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LeafOS / LeafOS-Project / android_frameworks_av / f94b6d6d8118e27213e38c0449159c60cbd74362 / . / media / extractors / mp4 / MPEG4Extractor.cpp
blob: 9d5890c42cbe7ab614139123da3e49bb1c506cde [file] [log] [blame]
/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//#define LOG_NDEBUG 0
#define LOG_TAG "MPEG4Extractor"
#include <ctype.h>
#include <inttypes.h>
#include <memory>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <log/log.h>
#include <utils/Log.h>
#include "AC4Parser.h"
#include "MPEG4Extractor.h"
#include "SampleTable.h"
#include "ItemTable.h"
#include "include/ESDS.h"
#include <media/DataSourceBase.h>
#include <media/ExtractorUtils.h>
#include <media/stagefright/foundation/ABitReader.h>
#include <media/stagefright/foundation/ABuffer.h>
#include <media/stagefright/foundation/ADebug.h>
#include <media/stagefright/foundation/AMessage.h>
#include <media/stagefright/foundation/AudioPresentationInfo.h>
#include <media/stagefright/foundation/AUtils.h>
#include <media/stagefright/foundation/ByteUtils.h>
#include <media/stagefright/foundation/ColorUtils.h>
#include <media/stagefright/foundation/avc_utils.h>
#include <media/stagefright/foundation/hexdump.h>
#include <media/stagefright/foundation/OpusHeader.h>
#include <media/stagefright/MediaBufferGroup.h>
#include <media/stagefright/MediaDefs.h>
#include <media/stagefright/MetaDataBase.h>
#include <utils/String8.h>
#include <byteswap.h>
#include "include/ID3.h"
#ifndef UINT32_MAX
#define UINT32_MAX (4294967295U)
#endif
#define ALAC_SPECIFIC_INFO_SIZE (36)
namespace android {
enum {
// max track header chunk to return
kMaxTrackHeaderSize = 32,
// maximum size of an atom. Some atoms can be bigger according to the spec,
// but we only allow up to this size.
kMaxAtomSize = 64 * 1024 * 1024,
};
class MPEG4Source : public MediaTrackHelper {
static const size_t kMaxPcmFrameSize = 8192;
public:
// Caller retains ownership of both "dataSource" and "sampleTable".
MPEG4Source(AMediaFormat *format,
DataSourceHelper *dataSource,
int32_t timeScale,
const sp<SampleTable> &sampleTable,
Vector<SidxEntry> &sidx,
const Trex *trex,
off64_t firstMoofOffset,
const sp<ItemTable> &itemTable,
uint64_t elstShiftStartTicks);
virtual status_t init();
virtual media_status_t start();
virtual media_status_t stop();
virtual media_status_t getFormat(AMediaFormat *);
virtual media_status_t read(MediaBufferHelper **buffer, const ReadOptions *options = NULL);
bool supportsNonBlockingRead() override { return true; }
virtual media_status_t fragmentedRead(
MediaBufferHelper **buffer, const ReadOptions *options = NULL);
virtual ~MPEG4Source();
private:
Mutex mLock;
AMediaFormat *mFormat;
DataSourceHelper *mDataSource;
int32_t mTimescale;
sp<SampleTable> mSampleTable;
uint32_t mCurrentSampleIndex;
uint32_t mCurrentFragmentIndex;
Vector<SidxEntry> &mSegments;
const Trex *mTrex;
off64_t mFirstMoofOffset;
off64_t mCurrentMoofOffset;
off64_t mNextMoofOffset;
uint32_t mCurrentTime; // in media timescale ticks
int32_t mLastParsedTrackId;
int32_t mTrackId;
int32_t mCryptoMode; // passed in from extractor
int32_t mDefaultIVSize; // passed in from extractor
uint8_t mCryptoKey[16]; // passed in from extractor
int32_t mDefaultEncryptedByteBlock;
int32_t mDefaultSkipByteBlock;
uint32_t mCurrentAuxInfoType;
uint32_t mCurrentAuxInfoTypeParameter;
int32_t mCurrentDefaultSampleInfoSize;
uint32_t mCurrentSampleInfoCount;
uint32_t mCurrentSampleInfoAllocSize;
uint8_t* mCurrentSampleInfoSizes;
uint32_t mCurrentSampleInfoOffsetCount;
uint32_t mCurrentSampleInfoOffsetsAllocSize;
uint64_t* mCurrentSampleInfoOffsets;
bool mIsAVC;
bool mIsHEVC;
bool mIsAC4;
bool mIsPcm;
size_t mNALLengthSize;
bool mStarted;
MediaBufferHelper *mBuffer;
uint8_t *mSrcBuffer;
bool mIsHeif;
bool mIsAudio;
sp<ItemTable> mItemTable;
// Start offset from composition time to presentation time.
// Support shift only for video tracks through mElstShiftStartTicks for now.
uint64_t mElstShiftStartTicks;
size_t parseNALSize(const uint8_t *data) const;
status_t parseChunk(off64_t *offset);
status_t parseTrackFragmentHeader(off64_t offset, off64_t size);
status_t parseTrackFragmentRun(off64_t offset, off64_t size);
status_t parseSampleAuxiliaryInformationSizes(off64_t offset, off64_t size);
status_t parseSampleAuxiliaryInformationOffsets(off64_t offset, off64_t size);
status_t parseClearEncryptedSizes(off64_t offset, bool isSubsampleEncryption, uint32_t flags);
status_t parseSampleEncryption(off64_t offset);
// returns -1 for invalid layer ID
int32_t parseHEVCLayerId(const uint8_t *data, size_t size);
struct TrackFragmentHeaderInfo {
enum Flags {
kBaseDataOffsetPresent = 0x01,
kSampleDescriptionIndexPresent = 0x02,
kDefaultSampleDurationPresent = 0x08,
kDefaultSampleSizePresent = 0x10,
kDefaultSampleFlagsPresent = 0x20,
kDurationIsEmpty = 0x10000,
};
uint32_t mTrackID;
uint32_t mFlags;
uint64_t mBaseDataOffset;
uint32_t mSampleDescriptionIndex;
uint32_t mDefaultSampleDuration;
uint32_t mDefaultSampleSize;
uint32_t mDefaultSampleFlags;
uint64_t mDataOffset;
};
TrackFragmentHeaderInfo mTrackFragmentHeaderInfo;
struct Sample {
off64_t offset;
size_t size;
uint32_t duration;
int32_t compositionOffset;
uint8_t iv[16];
Vector<size_t> clearsizes;
Vector<size_t> encryptedsizes;
};
Vector<Sample> mCurrentSamples;
MPEG4Source(const MPEG4Source &);
MPEG4Source &operator=(const MPEG4Source &);
};
// This custom data source wraps an existing one and satisfies requests
// falling entirely within a cached range from the cache while forwarding
// all remaining requests to the wrapped datasource.
// This is used to cache the full sampletable metadata for a single track,
// possibly wrapping multiple times to cover all tracks, i.e.
// Each CachedRangedDataSource caches the sampletable metadata for a single track.
class CachedRangedDataSource : public DataSourceHelper {
public:
explicit CachedRangedDataSource(DataSourceHelper *source);
virtual ~CachedRangedDataSource();
ssize_t readAt(off64_t offset, void *data, size_t size) override;
status_t getSize(off64_t *size) override;
uint32_t flags() override;
status_t setCachedRange(off64_t offset, size_t size, bool assumeSourceOwnershipOnSuccess);
private:
Mutex mLock;
DataSourceHelper *mSource;
bool mOwnsDataSource;
off64_t mCachedOffset;
size_t mCachedSize;
uint8_t *mCache;
void clearCache();
CachedRangedDataSource(const CachedRangedDataSource &);
CachedRangedDataSource &operator=(const CachedRangedDataSource &);
};
CachedRangedDataSource::CachedRangedDataSource(DataSourceHelper *source)
: DataSourceHelper(source),
mSource(source),
mOwnsDataSource(false),
mCachedOffset(0),
mCachedSize(0),
mCache(NULL) {
}
CachedRangedDataSource::~CachedRangedDataSource() {
clearCache();
if (mOwnsDataSource) {
delete mSource;
}
}
void CachedRangedDataSource::clearCache() {
if (mCache) {
free(mCache);
mCache = NULL;
}
mCachedOffset = 0;
mCachedSize = 0;
}
ssize_t CachedRangedDataSource::readAt(off64_t offset, void *data, size_t size) {
Mutex::Autolock autoLock(mLock);
if (isInRange(mCachedOffset, mCachedSize, offset, size)) {
memcpy(data, &mCache[offset - mCachedOffset], size);
return size;
}
return mSource->readAt(offset, data, size);
}
status_t CachedRangedDataSource::getSize(off64_t *size) {
return mSource->getSize(size);
}
uint32_t CachedRangedDataSource::flags() {
return mSource->flags();
}
status_t CachedRangedDataSource::setCachedRange(off64_t offset,
size_t size,
bool assumeSourceOwnershipOnSuccess) {
Mutex::Autolock autoLock(mLock);
clearCache();
mCache = (uint8_t *)malloc(size);
if (mCache == NULL) {
return -ENOMEM;
}
mCachedOffset = offset;
mCachedSize = size;
ssize_t err = mSource->readAt(mCachedOffset, mCache, mCachedSize);
if (err < (ssize_t)size) {
clearCache();
return ERROR_IO;
}
mOwnsDataSource = assumeSourceOwnershipOnSuccess;
return OK;
}
////////////////////////////////////////////////////////////////////////////////
static const bool kUseHexDump = false;
static const char *FourCC2MIME(uint32_t fourcc) {
switch (fourcc) {
case FOURCC("mp4a"):
return MEDIA_MIMETYPE_AUDIO_AAC;
case FOURCC("samr"):
return MEDIA_MIMETYPE_AUDIO_AMR_NB;
case FOURCC("sawb"):
return MEDIA_MIMETYPE_AUDIO_AMR_WB;
case FOURCC("ec-3"):
return MEDIA_MIMETYPE_AUDIO_EAC3;
case FOURCC("mp4v"):
return MEDIA_MIMETYPE_VIDEO_MPEG4;
case FOURCC("s263"):
case FOURCC("h263"):
case FOURCC("H263"):
return MEDIA_MIMETYPE_VIDEO_H263;
case FOURCC("avc1"):
return MEDIA_MIMETYPE_VIDEO_AVC;
case FOURCC("hvc1"):
case FOURCC("hev1"):
return MEDIA_MIMETYPE_VIDEO_HEVC;
case FOURCC("ac-4"):
return MEDIA_MIMETYPE_AUDIO_AC4;
case FOURCC("Opus"):
return MEDIA_MIMETYPE_AUDIO_OPUS;
case FOURCC("twos"):
case FOURCC("sowt"):
return MEDIA_MIMETYPE_AUDIO_RAW;
case FOURCC("alac"):
return MEDIA_MIMETYPE_AUDIO_ALAC;
case FOURCC("fLaC"):
return MEDIA_MIMETYPE_AUDIO_FLAC;
case FOURCC("av01"):
return MEDIA_MIMETYPE_VIDEO_AV1;
case FOURCC(".mp3"):
case 0x6D730055: // "ms U" mp3 audio
return MEDIA_MIMETYPE_AUDIO_MPEG;
default:
ALOGW("Unknown fourcc: %c%c%c%c",
(fourcc >> 24) & 0xff,
(fourcc >> 16) & 0xff,
(fourcc >> 8) & 0xff,
fourcc & 0xff
);
return "application/octet-stream";
}
}
static bool AdjustChannelsAndRate(uint32_t fourcc, uint32_t *channels, uint32_t *rate) {
if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, FourCC2MIME(fourcc))) {
// AMR NB audio is always mono, 8kHz
*channels = 1;
*rate = 8000;
return true;
} else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, FourCC2MIME(fourcc))) {
// AMR WB audio is always mono, 16kHz
*channels = 1;
*rate = 16000;
return true;
}
return false;
}
MPEG4Extractor::MPEG4Extractor(DataSourceHelper *source, const char *mime)
: mMoofOffset(0),
mMoofFound(false),
mMdatFound(false),
mDataSource(source),
mInitCheck(NO_INIT),
mHeaderTimescale(0),
mIsQT(false),
mIsHeif(false),
mHasMoovBox(false),
mPreferHeif(mime != NULL && !strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_HEIF)),
mFirstTrack(NULL),
mLastTrack(NULL) {
ALOGV("mime=%s, mPreferHeif=%d", mime, mPreferHeif);
mFileMetaData = AMediaFormat_new();
}
MPEG4Extractor::~MPEG4Extractor() {
Track *track = mFirstTrack;
while (track) {
Track *next = track->next;
delete track;
track = next;
}
mFirstTrack = mLastTrack = NULL;
for (size_t i = 0; i < mPssh.size(); i++) {
delete [] mPssh[i].data;
}
mPssh.clear();
delete mDataSource;
AMediaFormat_delete(mFileMetaData);
}
uint32_t MPEG4Extractor::flags() const {
return CAN_PAUSE |
((mMoofOffset == 0 || mSidxEntries.size() != 0) ?
(CAN_SEEK_BACKWARD | CAN_SEEK_FORWARD | CAN_SEEK) : 0);
}
media_status_t MPEG4Extractor::getMetaData(AMediaFormat *meta) {
status_t err;
if ((err = readMetaData()) != OK) {
return AMEDIA_ERROR_UNKNOWN;
}
AMediaFormat_copy(meta, mFileMetaData);
return AMEDIA_OK;
}
size_t MPEG4Extractor::countTracks() {
status_t err;
if ((err = readMetaData()) != OK) {
ALOGV("MPEG4Extractor::countTracks: no tracks");
return 0;
}
size_t n = 0;
Track *track = mFirstTrack;
while (track) {
++n;
track = track->next;
}
ALOGV("MPEG4Extractor::countTracks: %zu tracks", n);
return n;
}
media_status_t MPEG4Extractor::getTrackMetaData(
AMediaFormat *meta,
size_t index, uint32_t flags) {
status_t err;
if ((err = readMetaData()) != OK) {
return AMEDIA_ERROR_UNKNOWN;
}
Track *track = mFirstTrack;
while (index > 0) {
if (track == NULL) {
return AMEDIA_ERROR_UNKNOWN;
}
track = track->next;
--index;
}
if (track == NULL) {
return AMEDIA_ERROR_UNKNOWN;
}
[=] {
int64_t duration;
int32_t samplerate;
// Only for audio track.
if (track->has_elst && mHeaderTimescale != 0 &&
AMediaFormat_getInt64(track->meta, AMEDIAFORMAT_KEY_DURATION, &duration) &&
AMediaFormat_getInt32(track->meta, AMEDIAFORMAT_KEY_SAMPLE_RATE, &samplerate)) {
// Elst has to be processed only the first time this function is called.
track->has_elst = false;
if (track->elst_segment_duration > INT64_MAX) {
return;
}
int64_t segment_duration = track->elst_segment_duration;
int64_t media_time = track->elst_media_time;
int64_t halfscale = track->timescale / 2;
ALOGV("segment_duration = %" PRId64 ", media_time = %" PRId64
", halfscale = %" PRId64 ", mdhd_timescale = %d, track_timescale = %u",
segment_duration, media_time,
halfscale, mHeaderTimescale, track->timescale);
if ((uint32_t)samplerate != track->timescale){
ALOGV("samplerate:%" PRId32 ", track->timescale and samplerate are different!",
samplerate);
}
// Both delay and paddingsamples have to be set inorder for either to be
// effective in the lower layers.
int64_t delay = 0;
if (media_time > 0) { // Gapless playback
// delay = ((media_time * samplerate) + halfscale) / track->timescale;
if (__builtin_mul_overflow(media_time, samplerate, &delay) ||
__builtin_add_overflow(delay, halfscale, &delay) ||
(delay /= track->timescale, false) ||
delay > INT32_MAX ||
delay < INT32_MIN) {
ALOGW("ignoring edit list with bogus values");
return;
}
}
ALOGV("delay = %" PRId64, delay);
AMediaFormat_setInt32(track->meta, AMEDIAFORMAT_KEY_ENCODER_DELAY, delay);
int64_t paddingsamples = 0;
if (segment_duration > 0) {
int64_t scaled_duration;
// scaled_duration = duration * mHeaderTimescale;
if (__builtin_mul_overflow(duration, mHeaderTimescale, &scaled_duration)) {
return;
}
ALOGV("scaled_duration = %" PRId64, scaled_duration);
int64_t segment_end;
int64_t padding;
int64_t segment_duration_e6;
int64_t media_time_scaled_e6;
int64_t media_time_scaled;
// padding = scaled_duration - ((segment_duration * 1000000) +
// ((media_time * mHeaderTimescale * 1000000)/track->timescale) )
// segment_duration is based on timescale in movie header box(mdhd)
// media_time is based on timescale track header/media timescale
if (__builtin_mul_overflow(segment_duration, 1000000, &segment_duration_e6) ||
__builtin_mul_overflow(media_time, mHeaderTimescale, &media_time_scaled) ||
__builtin_mul_overflow(media_time_scaled, 1000000, &media_time_scaled_e6)) {
return;
}
media_time_scaled_e6 /= track->timescale;
if (__builtin_add_overflow(segment_duration_e6, media_time_scaled_e6, &segment_end)
|| __builtin_sub_overflow(scaled_duration, segment_end, &padding)) {
return;
}
ALOGV("segment_end = %" PRId64 ", padding = %" PRId64, segment_end, padding);
// track duration from media header (which is what AMEDIAFORMAT_KEY_DURATION is)
// might be slightly shorter than the segment duration, which would make the
// padding negative. Clamp to zero.
if (padding > 0) {
int64_t halfscale_mht = mHeaderTimescale / 2;
int64_t halfscale_e6;
int64_t timescale_e6;
// paddingsamples = ((padding * samplerate) + (halfscale_mht * 1000000))
// / (mHeaderTimescale * 1000000);
if (__builtin_mul_overflow(padding, samplerate, &paddingsamples) ||
__builtin_mul_overflow(halfscale_mht, 1000000, &halfscale_e6) ||
__builtin_mul_overflow(mHeaderTimescale, 1000000, &timescale_e6) ||
__builtin_add_overflow(paddingsamples, halfscale_e6, &paddingsamples) ||
(paddingsamples /= timescale_e6, false) ||
paddingsamples > INT32_MAX) {
return;
}
}
}
ALOGV("paddingsamples = %" PRId64, paddingsamples);
AMediaFormat_setInt32(track->meta, AMEDIAFORMAT_KEY_ENCODER_PADDING, paddingsamples);
}
}();
if ((flags & kIncludeExtensiveMetaData)
&& !track->includes_expensive_metadata) {
track->includes_expensive_metadata = true;
const char *mime;
CHECK(AMediaFormat_getString(track->meta, AMEDIAFORMAT_KEY_MIME, &mime));
if (!strncasecmp("video/", mime, 6)) {
// MPEG2 tracks do not provide CSD, so read the stream header
if (!strcmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG2)) {
off64_t offset;
size_t size;
if (track->sampleTable->getMetaDataForSample(
0 /* sampleIndex */, &offset, &size, NULL /* sampleTime */) == OK) {
if (size > kMaxTrackHeaderSize) {
size = kMaxTrackHeaderSize;
}
uint8_t header[kMaxTrackHeaderSize];
if (mDataSource->readAt(offset, &header, size) == (ssize_t)size) {
AMediaFormat_setBuffer(track->meta,
AMEDIAFORMAT_KEY_MPEG2_STREAM_HEADER, header, size);
}
}
}
if (mMoofOffset > 0) {
int64_t duration;
if (AMediaFormat_getInt64(track->meta,
AMEDIAFORMAT_KEY_DURATION, &duration)) {
// nothing fancy, just pick a frame near 1/4th of the duration
AMediaFormat_setInt64(track->meta,
AMEDIAFORMAT_KEY_THUMBNAIL_TIME, duration / 4);
}
} else {
uint32_t sampleIndex;
uint64_t sampleTime;
if (track->timescale != 0 &&
track->sampleTable->findThumbnailSample(&sampleIndex) == OK
&& track->sampleTable->getMetaDataForSample(
sampleIndex, NULL /* offset */, NULL /* size */,
&sampleTime) == OK) {
AMediaFormat_setInt64(track->meta,
AMEDIAFORMAT_KEY_THUMBNAIL_TIME,
((int64_t)sampleTime * 1000000) / track->timescale);
}
}
}
}
AMediaFormat_copy(meta, track->meta);
return AMEDIA_OK;
}
status_t MPEG4Extractor::readMetaData() {
if (mInitCheck != NO_INIT) {
return mInitCheck;
}
off64_t offset = 0;
status_t err;
bool sawMoovOrSidx = false;
while (!((mHasMoovBox && sawMoovOrSidx && (mMdatFound || mMoofFound)) ||
(mIsHeif && (mPreferHeif || !mHasMoovBox) &&
(mItemTable != NULL) && mItemTable->isValid()))) {
off64_t orig_offset = offset;
err = parseChunk(&offset, 0);
if (err != OK && err != UNKNOWN_ERROR) {
break;
} else if (offset <= orig_offset) {
// only continue parsing if the offset was advanced,
// otherwise we might end up in an infinite loop
ALOGE("did not advance: %lld->%lld", (long long)orig_offset, (long long)offset);
err = ERROR_MALFORMED;
break;
} else if (err == UNKNOWN_ERROR) {
sawMoovOrSidx = true;
}
}
if (mIsHeif && (mItemTable != NULL) && (mItemTable->countImages() > 0)) {
off64_t exifOffset;
size_t exifSize;
if (mItemTable->getExifOffsetAndSize(&exifOffset, &exifSize) == OK) {
AMediaFormat_setInt64(mFileMetaData,
AMEDIAFORMAT_KEY_EXIF_OFFSET, (int64_t)exifOffset);
AMediaFormat_setInt64(mFileMetaData,
AMEDIAFORMAT_KEY_EXIF_SIZE, (int64_t)exifSize);
}
for (uint32_t imageIndex = 0;
imageIndex < mItemTable->countImages(); imageIndex++) {
AMediaFormat *meta = mItemTable->getImageMeta(imageIndex);
if (meta == NULL) {
ALOGE("heif image %u has no meta!", imageIndex);
continue;
}
// Some heif files advertise image sequence brands (eg. 'hevc') in
// ftyp box, but don't have any valid tracks in them. Instead of
// reporting the entire file as malformed, we override the error
// to allow still images to be extracted.
if (err != OK) {
ALOGW("Extracting still images only");
err = OK;
}
mInitCheck = OK;
ALOGV("adding HEIF image track %u", imageIndex);
Track *track = new Track;
if (mLastTrack != NULL) {
mLastTrack->next = track;
} else {
mFirstTrack = track;
}
mLastTrack = track;
track->meta = meta;
AMediaFormat_setInt32(track->meta, AMEDIAFORMAT_KEY_TRACK_ID, imageIndex);
track->timescale = 1000000;
}
}
if (mInitCheck == OK) {
if (findTrackByMimePrefix("video/") != NULL) {
AMediaFormat_setString(mFileMetaData,
AMEDIAFORMAT_KEY_MIME, MEDIA_MIMETYPE_CONTAINER_MPEG4);
} else if (findTrackByMimePrefix("audio/") != NULL) {
AMediaFormat_setString(mFileMetaData,
AMEDIAFORMAT_KEY_MIME, "audio/mp4");
} else if (findTrackByMimePrefix(
MEDIA_MIMETYPE_IMAGE_ANDROID_HEIC) != NULL) {
AMediaFormat_setString(mFileMetaData,
AMEDIAFORMAT_KEY_MIME, MEDIA_MIMETYPE_CONTAINER_HEIF);
} else {
AMediaFormat_setString(mFileMetaData,
AMEDIAFORMAT_KEY_MIME, "application/octet-stream");
}
} else {
mInitCheck = err;
}
CHECK_NE(err, (status_t)NO_INIT);
// copy pssh data into file metadata
uint64_t psshsize = 0;
for (size_t i = 0; i < mPssh.size(); i++) {
psshsize += 20 + mPssh[i].datalen;
}
if (psshsize > 0 && psshsize <= UINT32_MAX) {
char *buf = (char*)malloc(psshsize);
if (!buf) {
ALOGE("b/28471206");
return NO_MEMORY;
}
char *ptr = buf;
for (size_t i = 0; i < mPssh.size(); i++) {
memcpy(ptr, mPssh[i].uuid, 20); // uuid + length
memcpy(ptr + 20, mPssh[i].data, mPssh[i].datalen);
ptr += (20 + mPssh[i].datalen);
}
AMediaFormat_setBuffer(mFileMetaData, AMEDIAFORMAT_KEY_PSSH, buf, psshsize);
free(buf);
}
return mInitCheck;
}
struct PathAdder {
PathAdder(Vector<uint32_t> *path, uint32_t chunkType)
: mPath(path) {
mPath->push(chunkType);
}
~PathAdder() {
mPath->pop();
}
private:
Vector<uint32_t> *mPath;
PathAdder(const PathAdder &);
PathAdder &operator=(const PathAdder &);
};
static bool underMetaDataPath(const Vector<uint32_t> &path) {
return path.size() >= 5
&& path[0] == FOURCC("moov")
&& path[1] == FOURCC("udta")
&& path[2] == FOURCC("meta")
&& path[3] == FOURCC("ilst");
}
static bool underQTMetaPath(const Vector<uint32_t> &path, int32_t depth) {
return path.size() >= 2
&& path[0] == FOURCC("moov")
&& path[1] == FOURCC("meta")
&& (depth == 2
|| (depth == 3
&& (path[2] == FOURCC("hdlr")
|| path[2] == FOURCC("ilst")
|| path[2] == FOURCC("keys"))));
}
// Given a time in seconds since Jan 1 1904, produce a human-readable string.
static bool convertTimeToDate(int64_t time_1904, String8 *s) {
// delta between mpeg4 time and unix epoch time
static const int64_t delta = (((66 * 365 + 17) * 24) * 3600);
if (time_1904 < INT64_MIN + delta) {
return false;
}
time_t time_1970 = time_1904 - delta;
char tmp[32];
struct tm* tm = gmtime(&time_1970);
if (tm != NULL &&
strftime(tmp, sizeof(tmp), "%Y%m%dT%H%M%S.000Z", tm) > 0) {
s->setTo(tmp);
return true;
}
return false;
}
status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
ALOGV("entering parseChunk %lld/%d", (long long)*offset, depth);
if (*offset < 0) {
ALOGE("b/23540914");
return ERROR_MALFORMED;
}
if (depth > 100) {
ALOGE("b/27456299");
return ERROR_MALFORMED;
}
uint32_t hdr[2];
if (mDataSource->readAt(*offset, hdr, 8) < 8) {
return ERROR_IO;
}
uint64_t chunk_size = ntohl(hdr[0]);
int32_t chunk_type = ntohl(hdr[1]);
off64_t data_offset = *offset + 8;
if (chunk_size == 1) {
if (mDataSource->readAt(*offset + 8, &chunk_size, 8) < 8) {
return ERROR_IO;
}
chunk_size = ntoh64(chunk_size);
data_offset += 8;
if (chunk_size < 16) {
// The smallest valid chunk is 16 bytes long in this case.
return ERROR_MALFORMED;
}
} else if (chunk_size == 0) {
if (depth == 0) {
// atom extends to end of file
off64_t sourceSize;
if (mDataSource->getSize(&sourceSize) == OK) {
chunk_size = (sourceSize - *offset);
} else {
// XXX could we just pick a "sufficiently large" value here?
ALOGE("atom size is 0, and data source has no size");
return ERROR_MALFORMED;
}
} else {
// not allowed for non-toplevel atoms, skip it
*offset += 4;
return OK;
}
} else if (chunk_size < 8) {
// The smallest valid chunk is 8 bytes long.
ALOGE("invalid chunk size: %" PRIu64, chunk_size);
return ERROR_MALFORMED;
}
char chunk[5];
MakeFourCCString(chunk_type, chunk);
ALOGV("chunk: %s @ %lld, %d", chunk, (long long)*offset, depth);
if (kUseHexDump) {
static const char kWhitespace[] = " ";
const char *indent = &kWhitespace[sizeof(kWhitespace) - 1 - 2 * depth];
printf("%sfound chunk '%s' of size %" PRIu64 "\n", indent, chunk, chunk_size);
char buffer[256];
size_t n = chunk_size;
if (n > sizeof(buffer)) {
n = sizeof(buffer);
}
if (mDataSource->readAt(*offset, buffer, n)
< (ssize_t)n) {
return ERROR_IO;
}
hexdump(buffer, n);
}
PathAdder autoAdder(&mPath, chunk_type);
// (data_offset - *offset) is either 8 or 16
off64_t chunk_data_size = chunk_size - (data_offset - *offset);
if (chunk_data_size < 0) {
ALOGE("b/23540914");
return ERROR_MALFORMED;
}
if (chunk_type != FOURCC("mdat") && chunk_data_size > kMaxAtomSize) {
char errMsg[100];
sprintf(errMsg, "%s atom has size %" PRId64, chunk, chunk_data_size);
ALOGE("%s (b/28615448)", errMsg);
android_errorWriteWithInfoLog(0x534e4554, "28615448", -1, errMsg, strlen(errMsg));
return ERROR_MALFORMED;
}
if (chunk_type != FOURCC("cprt")
&& chunk_type != FOURCC("covr")
&& mPath.size() == 5 && underMetaDataPath(mPath)) {
off64_t stop_offset = *offset + chunk_size;
*offset = data_offset;
while (*offset < stop_offset) {
status_t err = parseChunk(offset, depth + 1);
if (err != OK) {
return err;
}
}
if (*offset != stop_offset) {
return ERROR_MALFORMED;
}
return OK;
}
switch(chunk_type) {
case FOURCC("moov"):
case FOURCC("trak"):
case FOURCC("mdia"):
case FOURCC("minf"):
case FOURCC("dinf"):
case FOURCC("stbl"):
case FOURCC("mvex"):
case FOURCC("moof"):
case FOURCC("traf"):
case FOURCC("mfra"):
case FOURCC("udta"):
case FOURCC("ilst"):
case FOURCC("sinf"):
case FOURCC("schi"):
case FOURCC("edts"):
case FOURCC("wave"):
{
if (chunk_type == FOURCC("moov") && depth != 0) {
ALOGE("moov: depth %d", depth);
return ERROR_MALFORMED;
}
if (chunk_type == FOURCC("moov") && mInitCheck == OK) {
ALOGE("duplicate moov");
return ERROR_MALFORMED;
}
if (chunk_type == FOURCC("moof") && !mMoofFound) {
// store the offset of the first segment
mMoofFound = true;
mMoofOffset = *offset;
}
if (chunk_type == FOURCC("stbl")) {
ALOGV("sampleTable chunk is %" PRIu64 " bytes long.", chunk_size);
if (mDataSource->flags()
& (DataSourceBase::kWantsPrefetching
| DataSourceBase::kIsCachingDataSource)) {
CachedRangedDataSource *cachedSource =
new CachedRangedDataSource(mDataSource);
if (cachedSource->setCachedRange(
*offset, chunk_size,
true /* assume ownership on success */) == OK) {
mDataSource = cachedSource;
} else {
delete cachedSource;
}
}
if (mLastTrack == NULL) {
return ERROR_MALFORMED;
}
mLastTrack->sampleTable = new SampleTable(mDataSource);
}
bool isTrack = false;
if (chunk_type == FOURCC("trak")) {
if (depth != 1) {
ALOGE("trak: depth %d", depth);
return ERROR_MALFORMED;
}
isTrack = true;
ALOGV("adding new track");
Track *track = new Track;
if (mLastTrack) {
mLastTrack->next = track;
} else {
mFirstTrack = track;
}
mLastTrack = track;
track->meta = AMediaFormat_new();
AMediaFormat_setString(track->meta,
AMEDIAFORMAT_KEY_MIME, "application/octet-stream");
}
off64_t stop_offset = *offset + chunk_size;
*offset = data_offset;
while (*offset < stop_offset) {
// pass udata terminate
if (mIsQT && stop_offset - *offset == 4 && chunk_type == FOURCC("udta")) {
// handle the case that udta terminates with terminate code x00000000
// note that 0 terminator is optional and we just handle this case.
uint32_t terminate_code = 1;
mDataSource->readAt(*offset, &terminate_code, 4);
if (0 == terminate_code) {
*offset += 4;
ALOGD("Terminal code for udta");
continue;
} else {
ALOGW("invalid udta Terminal code");
}
}
status_t err = parseChunk(offset, depth + 1);
if (err != OK) {
if (isTrack) {
mLastTrack->skipTrack = true;
break;
}
return err;
}
}
if (*offset != stop_offset) {
return ERROR_MALFORMED;
}
if (isTrack) {
int32_t trackId;
// There must be exactly one track header per track.
if (!AMediaFormat_getInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_TRACK_ID, &trackId)) {
mLastTrack->skipTrack = true;
}
status_t err = verifyTrack(mLastTrack);
if (err != OK) {
mLastTrack->skipTrack = true;
}
if (mLastTrack->skipTrack) {
ALOGV("skipping this track...");
Track *cur = mFirstTrack;
if (cur == mLastTrack) {
delete cur;
mFirstTrack = mLastTrack = NULL;
} else {
while (cur && cur->next != mLastTrack) {
cur = cur->next;
}
if (cur) {
cur->next = NULL;
}
delete mLastTrack;
mLastTrack = cur;
}
return OK;
}
// place things we built elsewhere into their final locations
// put aggregated tx3g data into the metadata
if (mLastTrack->mTx3gFilled > 0) {
ALOGV("Putting %zu bytes of tx3g data into meta data",
mLastTrack->mTx3gFilled);
AMediaFormat_setBuffer(mLastTrack->meta,
AMEDIAFORMAT_KEY_TEXT_FORMAT_DATA,
mLastTrack->mTx3gBuffer, mLastTrack->mTx3gFilled);
// drop it now to reduce our footprint
free(mLastTrack->mTx3gBuffer);
mLastTrack->mTx3gBuffer = NULL;
}
} else if (chunk_type == FOURCC("moov")) {
mInitCheck = OK;
return UNKNOWN_ERROR; // Return a dummy error.
}
break;
}
case FOURCC("schm"):
{
*offset += chunk_size;
if (!mLastTrack) {
return ERROR_MALFORMED;
}
uint32_t scheme_type;
if (mDataSource->readAt(data_offset + 4, &scheme_type, 4) < 4) {
return ERROR_IO;
}
scheme_type = ntohl(scheme_type);
int32_t mode = kCryptoModeUnencrypted;
switch(scheme_type) {
case FOURCC("cbc1"):
{
mode = kCryptoModeAesCbc;
break;
}
case FOURCC("cbcs"):
{
mode = kCryptoModeAesCbc;
mLastTrack->subsample_encryption = true;
break;
}
case FOURCC("cenc"):
{
mode = kCryptoModeAesCtr;
break;
}
case FOURCC("cens"):
{
mode = kCryptoModeAesCtr;
mLastTrack->subsample_encryption = true;
break;
}
}
if (mode != kCryptoModeUnencrypted) {
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_CRYPTO_MODE, mode);
}
break;
}
case FOURCC("elst"):
{
*offset += chunk_size;
if (!mLastTrack) {
return ERROR_MALFORMED;
}
// See 14496-12 8.6.6
uint8_t version;
if (mDataSource->readAt(data_offset, &version, 1) < 1) {
return ERROR_IO;
}
uint32_t entry_count;
if (!mDataSource->getUInt32(data_offset + 4, &entry_count)) {
return ERROR_IO;
}
if (entry_count != 1) {
// we only support a single entry at the moment, for gapless playback
// or start offset
ALOGW("ignoring edit list with %d entries", entry_count);
} else {
off64_t entriesoffset = data_offset + 8;
uint64_t segment_duration;
int64_t media_time;
if (version == 1) {
if (!mDataSource->getUInt64(entriesoffset, &segment_duration) ||
!mDataSource->getUInt64(entriesoffset + 8, (uint64_t*)&media_time)) {
return ERROR_IO;
}
} else if (version == 0) {
uint32_t sd;
int32_t mt;
if (!mDataSource->getUInt32(entriesoffset, &sd) ||
!mDataSource->getUInt32(entriesoffset + 4, (uint32_t*)&mt)) {
return ERROR_IO;
}
segment_duration = sd;
media_time = mt;
} else {
return ERROR_IO;
}
// save these for later, because the elst atom might precede
// the atoms that actually gives us the duration and sample rate
// needed to calculate the padding and delay values
mLastTrack->has_elst = true;
mLastTrack->elst_media_time = media_time;
mLastTrack->elst_segment_duration = segment_duration;
}
break;
}
case FOURCC("frma"):
{
*offset += chunk_size;
uint32_t original_fourcc;
if (mDataSource->readAt(data_offset, &original_fourcc, 4) < 4) {
return ERROR_IO;
}
original_fourcc = ntohl(original_fourcc);
ALOGV("read original format: %d", original_fourcc);
if (mLastTrack == NULL) {
return ERROR_MALFORMED;
}
AMediaFormat_setString(mLastTrack->meta,
AMEDIAFORMAT_KEY_MIME, FourCC2MIME(original_fourcc));
uint32_t num_channels = 0;
uint32_t sample_rate = 0;
if (AdjustChannelsAndRate(original_fourcc, &num_channels, &sample_rate)) {
AMediaFormat_setInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_CHANNEL_COUNT, num_channels);
AMediaFormat_setInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_SAMPLE_RATE, sample_rate);
}
if (!mIsQT && original_fourcc == FOURCC("alac")) {
off64_t tmpOffset = *offset;
status_t err = parseALACSampleEntry(&tmpOffset);
if (err != OK) {
ALOGE("parseALACSampleEntry err:%d Line:%d", err, __LINE__);
return err;
}
*offset = tmpOffset + 8;
}
break;
}
case FOURCC("tenc"):
{
*offset += chunk_size;
if (chunk_size < 32) {
return ERROR_MALFORMED;
}
// tenc box contains 1 byte version, 3 byte flags, 3 byte default algorithm id, one byte
// default IV size, 16 bytes default KeyID
// (ISO 23001-7)
uint8_t version;
if (mDataSource->readAt(data_offset, &version, sizeof(version))
< (ssize_t)sizeof(version)) {
return ERROR_IO;
}
uint8_t buf[4];
memset(buf, 0, 4);
if (mDataSource->readAt(data_offset + 4, buf + 1, 3) < 3) {
return ERROR_IO;
}
if (mLastTrack == NULL) {
return ERROR_MALFORMED;
}
uint8_t defaultEncryptedByteBlock = 0;
uint8_t defaultSkipByteBlock = 0;
uint32_t defaultAlgorithmId = ntohl(*((int32_t*)buf));
if (version == 1) {
uint32_t pattern = buf[2];
defaultEncryptedByteBlock = pattern >> 4;
defaultSkipByteBlock = pattern & 0xf;
if (defaultEncryptedByteBlock == 0 && defaultSkipByteBlock == 0) {
// use (1,0) to mean "encrypt everything"
defaultEncryptedByteBlock = 1;
}
} else if (mLastTrack->subsample_encryption) {
ALOGW("subsample_encryption should be version 1");
} else if (defaultAlgorithmId > 1) {
// only 0 (clear) and 1 (AES-128) are valid
ALOGW("defaultAlgorithmId: %u is a reserved value", defaultAlgorithmId);
defaultAlgorithmId = 1;
}
memset(buf, 0, 4);
if (mDataSource->readAt(data_offset + 7, buf + 3, 1) < 1) {
return ERROR_IO;
}
uint32_t defaultIVSize = ntohl(*((int32_t*)buf));
if (defaultAlgorithmId == 0 && defaultIVSize != 0) {
// only unencrypted data must have 0 IV size
return ERROR_MALFORMED;
} else if (defaultIVSize != 0 &&
defaultIVSize != 8 &&
defaultIVSize != 16) {
return ERROR_MALFORMED;
}
uint8_t defaultKeyId[16];
if (mDataSource->readAt(data_offset + 8, &defaultKeyId, 16) < 16) {
return ERROR_IO;
}
sp<ABuffer> defaultConstantIv;
if (defaultAlgorithmId != 0 && defaultIVSize == 0) {
uint8_t ivlength;
if (mDataSource->readAt(data_offset + 24, &ivlength, sizeof(ivlength))
< (ssize_t)sizeof(ivlength)) {
return ERROR_IO;
}
if (ivlength != 8 && ivlength != 16) {
ALOGW("unsupported IV length: %u", ivlength);
return ERROR_MALFORMED;
}
defaultConstantIv = new ABuffer(ivlength);
if (mDataSource->readAt(data_offset + 25, defaultConstantIv->data(), ivlength)
< (ssize_t)ivlength) {
return ERROR_IO;
}
defaultConstantIv->setRange(0, ivlength);
}
int32_t tmpAlgorithmId;
if (!AMediaFormat_getInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_CRYPTO_MODE, &tmpAlgorithmId)) {
AMediaFormat_setInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_CRYPTO_MODE, defaultAlgorithmId);
}
AMediaFormat_setInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_CRYPTO_DEFAULT_IV_SIZE, defaultIVSize);
AMediaFormat_setBuffer(mLastTrack->meta,
AMEDIAFORMAT_KEY_CRYPTO_KEY, defaultKeyId, 16);
AMediaFormat_setInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_CRYPTO_ENCRYPTED_BYTE_BLOCK, defaultEncryptedByteBlock);
AMediaFormat_setInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_CRYPTO_SKIP_BYTE_BLOCK, defaultSkipByteBlock);
if (defaultConstantIv != NULL) {
AMediaFormat_setBuffer(mLastTrack->meta, AMEDIAFORMAT_KEY_CRYPTO_IV,
defaultConstantIv->data(), defaultConstantIv->size());
}
break;
}
case FOURCC("tkhd"):
{
*offset += chunk_size;
status_t err;
if ((err = parseTrackHeader(data_offset, chunk_data_size)) != OK) {
return err;
}
break;
}
case FOURCC("tref"):
{
off64_t stop_offset = *offset + chunk_size;
*offset = data_offset;
while (*offset < stop_offset) {
status_t err = parseChunk(offset, depth + 1);
if (err != OK) {
return err;
}
}
if (*offset != stop_offset) {
return ERROR_MALFORMED;
}
break;
}
case FOURCC("thmb"):
{
*offset += chunk_size;
if (mLastTrack != NULL) {
// Skip thumbnail track for now since we don't have an
// API to retrieve it yet.
// The thumbnail track can't be accessed by negative index or time,
// because each timed sample has its own corresponding thumbnail
// in the thumbnail track. We'll need a dedicated API to retrieve
// thumbnail at time instead.
mLastTrack->skipTrack = true;
}
break;
}
case FOURCC("pssh"):
{
*offset += chunk_size;
PsshInfo pssh;
if (mDataSource->readAt(data_offset + 4, &pssh.uuid, 16) < 16) {
return ERROR_IO;
}
uint32_t psshdatalen = 0;
if (mDataSource->readAt(data_offset + 20, &psshdatalen, 4) < 4) {
return ERROR_IO;
}
pssh.datalen = ntohl(psshdatalen);
ALOGV("pssh data size: %d", pssh.datalen);
if (chunk_size < 20 || pssh.datalen > chunk_size - 20) {
// pssh data length exceeds size of containing box
return ERROR_MALFORMED;
}
pssh.data = new (std::nothrow) uint8_t[pssh.datalen];
if (pssh.data == NULL) {
return ERROR_MALFORMED;
}
ALOGV("allocated pssh @ %p", pssh.data);
ssize_t requested = (ssize_t) pssh.datalen;
if (mDataSource->readAt(data_offset + 24, pssh.data, requested) < requested) {
delete[] pssh.data;
return ERROR_IO;
}
mPssh.push_back(pssh);
break;
}
case FOURCC("mdhd"):
{
*offset += chunk_size;
if (chunk_data_size < 4 || mLastTrack == NULL) {
return ERROR_MALFORMED;
}
uint8_t version;
if (mDataSource->readAt(
data_offset, &version, sizeof(version))
< (ssize_t)sizeof(version)) {
return ERROR_IO;
}
off64_t timescale_offset;
if (version == 1) {
timescale_offset = data_offset + 4 + 16;
} else if (version == 0) {
timescale_offset = data_offset + 4 + 8;
} else {
return ERROR_IO;
}
uint32_t timescale;
if (mDataSource->readAt(
timescale_offset, &timescale, sizeof(timescale))
< (ssize_t)sizeof(timescale)) {
return ERROR_IO;
}
if (!timescale) {
ALOGE("timescale should not be ZERO.");
return ERROR_MALFORMED;
}
mLastTrack->timescale = ntohl(timescale);
// 14496-12 says all ones means indeterminate, but some files seem to use
// 0 instead. We treat both the same.
int64_t duration = 0;
if (version == 1) {
if (mDataSource->readAt(
timescale_offset + 4, &duration, sizeof(duration))
< (ssize_t)sizeof(duration)) {
return ERROR_IO;
}
if (duration != -1) {
duration = ntoh64(duration);
}
} else {
uint32_t duration32;
if (mDataSource->readAt(
timescale_offset + 4, &duration32, sizeof(duration32))
< (ssize_t)sizeof(duration32)) {
return ERROR_IO;
}
if (duration32 != 0xffffffff) {
duration = ntohl(duration32);
}
}
if (duration != 0 && mLastTrack->timescale != 0) {
long double durationUs = ((long double)duration * 1000000) / mLastTrack->timescale;
if (durationUs < 0 || durationUs > INT64_MAX) {
ALOGE("cannot represent %lld * 1000000 / %lld in 64 bits",
(long long) duration, (long long) mLastTrack->timescale);
return ERROR_MALFORMED;
}
AMediaFormat_setInt64(mLastTrack->meta, AMEDIAFORMAT_KEY_DURATION, durationUs);
}
uint8_t lang[2];
off64_t lang_offset;
if (version == 1) {
lang_offset = timescale_offset + 4 + 8;
} else if (version == 0) {
lang_offset = timescale_offset + 4 + 4;
} else {
return ERROR_IO;
}
if (mDataSource->readAt(lang_offset, &lang, sizeof(lang))
< (ssize_t)sizeof(lang)) {
return ERROR_IO;
}
// To get the ISO-639-2/T three character language code
// 1 bit pad followed by 3 5-bits characters. Each character
// is packed as the difference between its ASCII value and 0x60.
char lang_code[4];
lang_code[0] = ((lang[0] >> 2) & 0x1f) + 0x60;
lang_code[1] = ((lang[0] & 0x3) << 3 | (lang[1] >> 5)) + 0x60;
lang_code[2] = (lang[1] & 0x1f) + 0x60;
lang_code[3] = '\0';
AMediaFormat_setString(mLastTrack->meta, AMEDIAFORMAT_KEY_LANGUAGE, lang_code);
break;
}
case FOURCC("stsd"):
{
uint8_t buffer[8];
if (chunk_data_size < (off64_t)sizeof(buffer)) {
return ERROR_MALFORMED;
}
if (mDataSource->readAt(
data_offset, buffer, 8) < 8) {
return ERROR_IO;
}
if (U32_AT(buffer) != 0) {
// Should be version 0, flags 0.
return ERROR_MALFORMED;
}
uint32_t entry_count = U32_AT(&buffer[4]);
if (entry_count > 1) {
// For 3GPP timed text, there could be multiple tx3g boxes contain
// multiple text display formats. These formats will be used to
// display the timed text.
// For encrypted files, there may also be more than one entry.
const char *mime;
if (mLastTrack == NULL)
return ERROR_MALFORMED;
CHECK(AMediaFormat_getString(mLastTrack->meta, AMEDIAFORMAT_KEY_MIME, &mime));
if (strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP) &&
strcasecmp(mime, "application/octet-stream")) {
// For now we only support a single type of media per track.
mLastTrack->skipTrack = true;
*offset += chunk_size;
break;
}
}
off64_t stop_offset = *offset + chunk_size;
*offset = data_offset + 8;
for (uint32_t i = 0; i < entry_count; ++i) {
status_t err = parseChunk(offset, depth + 1);
if (err != OK) {
return err;
}
}
if (*offset != stop_offset) {
return ERROR_MALFORMED;
}
break;
}
case FOURCC("mett"):
{
*offset += chunk_size;
if (mLastTrack == NULL)
return ERROR_MALFORMED;
auto buffer = heapbuffer<uint8_t>(chunk_data_size);
if (buffer.get() == NULL) {
return NO_MEMORY;
}
if (mDataSource->readAt(
data_offset, buffer.get(), chunk_data_size) < chunk_data_size) {
return ERROR_IO;
}
// Prior to API 29, the metadata track was not compliant with ISO/IEC
// 14496-12-2015. This led to some ISO-compliant parsers failing to read the
// metatrack. As of API 29 and onwards, a change was made to metadata track to
// make it compliant with the standard. The workaround is to write the
// null-terminated mime_format string twice. This allows compliant parsers to
// read the missing reserved, data_reference_index, and content_encoding fields
// from the first mime_type string. The actual mime_format field would then be
// read correctly from the second string. The non-compliant Android frameworks
// from API 28 and earlier would still be able to read the mime_format correctly
// as it would only read the first null-terminated mime_format string. To enable
// reading metadata tracks generated from both the non-compliant and compliant
// formats, a check needs to be done to see which format is used.
int null_pos = 0;
const unsigned char *str = buffer.get();
while (null_pos < chunk_data_size) {
if (*(str + null_pos) == '\0') {
break;
}
++null_pos;
}
if (null_pos == chunk_data_size - 1) {
// This is not a standard ompliant metadata track.
String8 mimeFormat((const char *)(buffer.get()), chunk_data_size);
AMediaFormat_setString(mLastTrack->meta,
AMEDIAFORMAT_KEY_MIME, mimeFormat.string());
} else {
// This is a standard compliant metadata track.
String8 contentEncoding((const char *)(buffer.get() + 8));
String8 mimeFormat((const char *)(buffer.get() + 8 + contentEncoding.size() + 1),
chunk_data_size - 8 - contentEncoding.size() - 1);
AMediaFormat_setString(mLastTrack->meta,
AMEDIAFORMAT_KEY_MIME, mimeFormat.string());
}
break;
}
case FOURCC("mp4a"):
case FOURCC("enca"):
case FOURCC("samr"):
case FOURCC("sawb"):
case FOURCC("Opus"):
case FOURCC("twos"):
case FOURCC("sowt"):
case FOURCC("alac"):
case FOURCC("fLaC"):
case FOURCC(".mp3"):
case 0x6D730055: // "ms U" mp3 audio
{
if (mIsQT && depth >= 1 && mPath[depth - 1] == FOURCC("wave")) {
if (chunk_type == FOURCC("alac")) {
off64_t offsetTmp = *offset;
status_t err = parseALACSampleEntry(&offsetTmp);
if (err != OK) {
ALOGE("parseALACSampleEntry err:%d Line:%d", err, __LINE__);
return err;
}
}
// Ignore all atoms embedded in QT wave atom
ALOGV("Ignore all atoms embedded in QT wave atom");
*offset += chunk_size;
break;
}
uint8_t buffer[8 + 20];
if (chunk_data_size < (ssize_t)sizeof(buffer)) {
// Basic AudioSampleEntry size.
return ERROR_MALFORMED;
}
if (mDataSource->readAt(
data_offset, buffer, sizeof(buffer)) < (ssize_t)sizeof(buffer)) {
return ERROR_IO;
}
uint16_t data_ref_index __unused = U16_AT(&buffer[6]);
uint16_t version = U16_AT(&buffer[8]);
uint32_t num_channels = U16_AT(&buffer[16]);
uint16_t sample_size = U16_AT(&buffer[18]);
uint32_t sample_rate = U32_AT(&buffer[24]) >> 16;
if (mLastTrack == NULL)
return ERROR_MALFORMED;
off64_t stop_offset = *offset + chunk_size;
*offset = data_offset + sizeof(buffer);
if (mIsQT) {
if (version == 1) {
if (mDataSource->readAt(*offset, buffer, 16) < 16) {
return ERROR_IO;
}
#if 0
U32_AT(buffer); // samples per packet
U32_AT(&buffer[4]); // bytes per packet
U32_AT(&buffer[8]); // bytes per frame
U32_AT(&buffer[12]); // bytes per sample
#endif
*offset += 16;
} else if (version == 2) {
uint8_t v2buffer[36];
if (mDataSource->readAt(*offset, v2buffer, 36) < 36) {
return ERROR_IO;
}
#if 0
U32_AT(v2buffer); // size of struct only
sample_rate = (uint32_t)U64_AT(&v2buffer[4]); // audio sample rate
num_channels = U32_AT(&v2buffer[12]); // num audio channels
U32_AT(&v2buffer[16]); // always 0x7f000000
sample_size = (uint16_t)U32_AT(&v2buffer[20]); // const bits per channel
U32_AT(&v2buffer[24]); // format specifc flags
U32_AT(&v2buffer[28]); // const bytes per audio packet
U32_AT(&v2buffer[32]); // const LPCM frames per audio packet
#endif
*offset += 36;
}
}
if (chunk_type != FOURCC("enca")) {
// if the chunk type is enca, we'll get the type from the frma box later
AMediaFormat_setString(mLastTrack->meta,
AMEDIAFORMAT_KEY_MIME, FourCC2MIME(chunk_type));
AdjustChannelsAndRate(chunk_type, &num_channels, &sample_rate);
if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_RAW, FourCC2MIME(chunk_type))) {
AMediaFormat_setInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_BITS_PER_SAMPLE, sample_size);
if (chunk_type == FOURCC("twos")) {
AMediaFormat_setInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_PCM_BIG_ENDIAN, 1);
}
}
}
ALOGV("*** coding='%s' %d channels, size %d, rate %d\n",
chunk, num_channels, sample_size, sample_rate);
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_CHANNEL_COUNT, num_channels);
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_SAMPLE_RATE, sample_rate);
if (chunk_type == FOURCC("Opus")) {
uint8_t opusInfo[AOPUS_OPUSHEAD_MAXSIZE];
data_offset += sizeof(buffer);
size_t opusInfoSize = chunk_data_size - sizeof(buffer);
if (opusInfoSize < AOPUS_OPUSHEAD_MINSIZE ||
opusInfoSize > AOPUS_OPUSHEAD_MAXSIZE) {
return ERROR_MALFORMED;
}
// Read Opus Header
if (mDataSource->readAt(
data_offset, opusInfo, opusInfoSize) < opusInfoSize) {
return ERROR_IO;
}
// OpusHeader must start with this magic sequence, overwrite first 8 bytes
// http://wiki.xiph.org/OggOpus#ID_Header
strncpy((char *)opusInfo, "OpusHead", 8);
// Version shall be 0 as per mp4 Opus Specific Box
// (https://opus-codec.org/docs/opus_in_isobmff.html#4.3.2)
if (opusInfo[8]) {
return ERROR_MALFORMED;
}
// Force version to 1 as per OpusHead definition
// (http://wiki.xiph.org/OggOpus#ID_Header)
opusInfo[8] = 1;
// Read Opus Specific Box values
size_t opusOffset = 10;
uint16_t pre_skip = U16_AT(&opusInfo[opusOffset]);
uint32_t sample_rate = U32_AT(&opusInfo[opusOffset + 2]);
uint16_t out_gain = U16_AT(&opusInfo[opusOffset + 6]);
// Convert Opus Specific Box values. ParseOpusHeader expects
// the values in LE, however MP4 stores these values as BE
// https://opus-codec.org/docs/opus_in_isobmff.html#4.3.2
memcpy(&opusInfo[opusOffset], &pre_skip, sizeof(pre_skip));
memcpy(&opusInfo[opusOffset + 2], &sample_rate, sizeof(sample_rate));
memcpy(&opusInfo[opusOffset + 6], &out_gain, sizeof(out_gain));
static const int64_t kSeekPreRollNs = 80000000; // Fixed 80 msec
static const int32_t kOpusSampleRate = 48000;
int64_t codecDelay = pre_skip * 1000000000ll / kOpusSampleRate;
AMediaFormat_setBuffer(mLastTrack->meta,
AMEDIAFORMAT_KEY_CSD_0, opusInfo, opusInfoSize);
AMediaFormat_setBuffer(mLastTrack->meta,
AMEDIAFORMAT_KEY_CSD_1, &codecDelay, sizeof(codecDelay));
AMediaFormat_setBuffer(mLastTrack->meta,
AMEDIAFORMAT_KEY_CSD_2, &kSeekPreRollNs, sizeof(kSeekPreRollNs));
data_offset += opusInfoSize;
*offset = data_offset;
CHECK_EQ(*offset, stop_offset);
}
if (!mIsQT && chunk_type == FOURCC("alac")) {
data_offset += sizeof(buffer);
status_t err = parseALACSampleEntry(&data_offset);
if (err != OK) {
ALOGE("parseALACSampleEntry err:%d Line:%d", err, __LINE__);
return err;
}
*offset = data_offset;
CHECK_EQ(*offset, stop_offset);
}
if (chunk_type == FOURCC("fLaC")) {
// From https://github.com/xiph/flac/blob/master/doc/isoflac.txt
// 4 for mime, 4 for blockType and BlockLen, 34 for metadata
uint8_t flacInfo[4 + 4 + 34];
// skipping dFla, version
data_offset += sizeof(buffer) + 12;
size_t flacOffset = 4;
// Add flaC header mime type to CSD
strncpy((char *)flacInfo, "fLaC", 4);
if (mDataSource->readAt(
data_offset, flacInfo + flacOffset, sizeof(flacInfo) - flacOffset) <
(ssize_t)sizeof(flacInfo) - flacOffset) {
return ERROR_IO;
}
data_offset += sizeof(flacInfo) - flacOffset;
AMediaFormat_setBuffer(mLastTrack->meta, AMEDIAFORMAT_KEY_CSD_0, flacInfo,
sizeof(flacInfo));
*offset = data_offset;
CHECK_EQ(*offset, stop_offset);
}
while (*offset < stop_offset) {
status_t err = parseChunk(offset, depth + 1);
if (err != OK) {
return err;
}
}
if (*offset != stop_offset) {
return ERROR_MALFORMED;
}
break;
}
case FOURCC("mp4v"):
case FOURCC("encv"):
case FOURCC("s263"):
case FOURCC("H263"):
case FOURCC("h263"):
case FOURCC("avc1"):
case FOURCC("hvc1"):
case FOURCC("hev1"):
case FOURCC("av01"):
{
uint8_t buffer[78];
if (chunk_data_size < (ssize_t)sizeof(buffer)) {
// Basic VideoSampleEntry size.
return ERROR_MALFORMED;
}
if (mDataSource->readAt(
data_offset, buffer, sizeof(buffer)) < (ssize_t)sizeof(buffer)) {
return ERROR_IO;
}
uint16_t data_ref_index __unused = U16_AT(&buffer[6]);
uint16_t width = U16_AT(&buffer[6 + 18]);
uint16_t height = U16_AT(&buffer[6 + 20]);
// The video sample is not standard-compliant if it has invalid dimension.
// Use some default width and height value, and
// let the decoder figure out the actual width and height (and thus
// be prepared for INFO_FOMRAT_CHANGED event).
if (width == 0) width = 352;
if (height == 0) height = 288;
// printf("*** coding='%s' width=%d height=%d\n",
// chunk, width, height);
if (mLastTrack == NULL)
return ERROR_MALFORMED;
if (chunk_type != FOURCC("encv")) {
// if the chunk type is encv, we'll get the type from the frma box later
AMediaFormat_setString(mLastTrack->meta,
AMEDIAFORMAT_KEY_MIME, FourCC2MIME(chunk_type));
}
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_WIDTH, width);
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_HEIGHT, height);
off64_t stop_offset = *offset + chunk_size;
*offset = data_offset + sizeof(buffer);
while (*offset < stop_offset) {
status_t err = parseChunk(offset, depth + 1);
if (err != OK) {
return err;
}
}
if (*offset != stop_offset) {
return ERROR_MALFORMED;
}
break;
}
case FOURCC("stco"):
case FOURCC("co64"):
{
if ((mLastTrack == NULL) || (mLastTrack->sampleTable == NULL)) {
return ERROR_MALFORMED;
}
status_t err =
mLastTrack->sampleTable->setChunkOffsetParams(
chunk_type, data_offset, chunk_data_size);
*offset += chunk_size;
if (err != OK) {
return err;
}
break;
}
case FOURCC("stsc"):
{
if ((mLastTrack == NULL) || (mLastTrack->sampleTable == NULL))
return ERROR_MALFORMED;
status_t err =
mLastTrack->sampleTable->setSampleToChunkParams(
data_offset, chunk_data_size);
*offset += chunk_size;
if (err != OK) {
return err;
}
break;
}
case FOURCC("stsz"):
case FOURCC("stz2"):
{
if ((mLastTrack == NULL) || (mLastTrack->sampleTable == NULL)) {
return ERROR_MALFORMED;
}
status_t err =
mLastTrack->sampleTable->setSampleSizeParams(
chunk_type, data_offset, chunk_data_size);
*offset += chunk_size;
if (err != OK) {
return err;
}
adjustRawDefaultFrameSize();
size_t max_size;
err = mLastTrack->sampleTable->getMaxSampleSize(&max_size);
if (err != OK) {
return err;
}
if (max_size != 0) {
// Assume that a given buffer only contains at most 10 chunks,
// each chunk originally prefixed with a 2 byte length will
// have a 4 byte header (0x00 0x00 0x00 0x01) after conversion,
// and thus will grow by 2 bytes per chunk.
if (max_size > SIZE_MAX - 10 * 2) {
ALOGE("max sample size too big: %zu", max_size);
return ERROR_MALFORMED;
}
AMediaFormat_setInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_MAX_INPUT_SIZE, max_size + 10 * 2);
} else {
// No size was specified. Pick a conservatively large size.
uint32_t width, height;
if (!AMediaFormat_getInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_WIDTH, (int32_t*)&width) ||
!AMediaFormat_getInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_HEIGHT,(int32_t*) &height)) {
ALOGE("No width or height, assuming worst case 1080p");
width = 1920;
height = 1080;
} else {
// A resolution was specified, check that it's not too big. The values below
// were chosen so that the calculations below don't cause overflows, they're
// not indicating that resolutions up to 32kx32k are actually supported.
if (width > 32768 || height > 32768) {
ALOGE("can't support %u x %u video", width, height);
return ERROR_MALFORMED;
}
}
const char *mime;
CHECK(AMediaFormat_getString(mLastTrack->meta, AMEDIAFORMAT_KEY_MIME, &mime));
if (!strncmp(mime, "audio/", 6)) {
// for audio, use 128KB
max_size = 1024 * 128;
} else if (!strcmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)
|| !strcmp(mime, MEDIA_MIMETYPE_VIDEO_HEVC)) {
// AVC & HEVC requires compression ratio of at least 2, and uses
// macroblocks
max_size = ((width + 15) / 16) * ((height + 15) / 16) * 192;
} else {
// For all other formats there is no minimum compression
// ratio. Use compression ratio of 1.
max_size = width * height * 3 / 2;
}
// HACK: allow 10% overhead
// TODO: read sample size from traf atom for fragmented MPEG4.
max_size += max_size / 10;
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_MAX_INPUT_SIZE, max_size);
}
// NOTE: setting another piece of metadata invalidates any pointers (such as the
// mimetype) previously obtained, so don't cache them.
const char *mime;
CHECK(AMediaFormat_getString(mLastTrack->meta, AMEDIAFORMAT_KEY_MIME, &mime));
// Calculate average frame rate.
if (!strncasecmp("video/", mime, 6)) {
size_t nSamples = mLastTrack->sampleTable->countSamples();
if (nSamples == 0) {
int32_t trackId;
if (AMediaFormat_getInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_TRACK_ID, &trackId)) {
for (size_t i = 0; i < mTrex.size(); i++) {
Trex *t = &mTrex.editItemAt(i);
if (t->track_ID == (uint32_t) trackId) {
if (t->default_sample_duration > 0) {
int32_t frameRate =
mLastTrack->timescale / t->default_sample_duration;
AMediaFormat_setInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_FRAME_RATE, frameRate);
}
break;
}
}
}
} else {
int64_t durationUs;
if (AMediaFormat_getInt64(mLastTrack->meta,
AMEDIAFORMAT_KEY_DURATION, &durationUs)) {
if (durationUs > 0) {
int32_t frameRate = (nSamples * 1000000LL +
(durationUs >> 1)) / durationUs;
AMediaFormat_setInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_FRAME_RATE, frameRate);
}
}
ALOGV("setting frame count %zu", nSamples);
AMediaFormat_setInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_FRAME_COUNT, nSamples);
}
}
break;
}
case FOURCC("stts"):
{
if ((mLastTrack == NULL) || (mLastTrack->sampleTable == NULL))
return ERROR_MALFORMED;
*offset += chunk_size;
if (depth >= 1 && mPath[depth - 1] != FOURCC("stbl")) {
char chunk[5];
MakeFourCCString(mPath[depth - 1], chunk);
ALOGW("stts's parent box (%s) is not stbl, skip it.", chunk);
break;
}
status_t err =
mLastTrack->sampleTable->setTimeToSampleParams(
data_offset, chunk_data_size);
if (err != OK) {
return err;
}
break;
}
case FOURCC("ctts"):
{
if ((mLastTrack == NULL) || (mLastTrack->sampleTable == NULL))
return ERROR_MALFORMED;
*offset += chunk_size;
status_t err =
mLastTrack->sampleTable->setCompositionTimeToSampleParams(
data_offset, chunk_data_size);
if (err != OK) {
return err;
}
break;
}
case FOURCC("stss"):
{
if ((mLastTrack == NULL) || (mLastTrack->sampleTable == NULL))
return ERROR_MALFORMED;
*offset += chunk_size;
status_t err =
mLastTrack->sampleTable->setSyncSampleParams(
data_offset, chunk_data_size);
if (err != OK) {
return err;
}
break;
}
// \xA9xyz
case FOURCC("\251xyz"):
{
*offset += chunk_size;
// Best case the total data length inside "\xA9xyz" box would
// be 9, for instance "\xA9xyz" + "\x00\x05\x15\xc7" + "+0+0/",
// where "\x00\x05" is the text string length with value = 5,
// "\0x15\xc7" is the language code = en, and "+0+0/" is a
// location (string) value with longitude = 0 and latitude = 0.
// Since some devices encountered in the wild omit the trailing
// slash, we'll allow that.
if (chunk_data_size < 8) { // 8 instead of 9 to allow for missing /
return ERROR_MALFORMED;
}
uint16_t len;
if (!mDataSource->getUInt16(data_offset, &len)) {
return ERROR_IO;
}
// allow "+0+0" without trailing slash
if (len < 4 || len > chunk_data_size - 4) {
return ERROR_MALFORMED;
}
// The location string following the language code is formatted
// according to ISO 6709:2008 (https://en.wikipedia.org/wiki/ISO_6709).
// Allocate 2 extra bytes, in case we need to add a trailing slash,
// and to add a terminating 0.
std::unique_ptr<char[]> buffer(new (std::nothrow) char[len+2]());
if (!buffer) {
return NO_MEMORY;
}
if (mDataSource->readAt(
data_offset + 4, &buffer[0], len) < len) {
return ERROR_IO;
}
len = strlen(&buffer[0]);
if (len < 4) {
return ERROR_MALFORMED;
}
// Add a trailing slash if there wasn't one.
if (buffer[len - 1] != '/') {
buffer[len] = '/';
}
AMediaFormat_setString(mFileMetaData, AMEDIAFORMAT_KEY_LOCATION, &buffer[0]);
break;
}
case FOURCC("esds"):
{
*offset += chunk_size;
if (chunk_data_size < 4) {
return ERROR_MALFORMED;
}
auto tmp = heapbuffer<uint8_t>(chunk_data_size);
uint8_t *buffer = tmp.get();
if (buffer == NULL) {
return -ENOMEM;
}
if (mDataSource->readAt(
data_offset, buffer, chunk_data_size) < chunk_data_size) {
return ERROR_IO;
}
if (U32_AT(buffer) != 0) {
// Should be version 0, flags 0.
return ERROR_MALFORMED;
}
if (mLastTrack == NULL)
return ERROR_MALFORMED;
AMediaFormat_setBuffer(mLastTrack->meta,
AMEDIAFORMAT_KEY_ESDS, &buffer[4], chunk_data_size - 4);
if (mPath.size() >= 2
&& mPath[mPath.size() - 2] == FOURCC("mp4a")) {
// Information from the ESDS must be relied on for proper
// setup of sample rate and channel count for MPEG4 Audio.
// The generic header appears to only contain generic
// information...
status_t err = updateAudioTrackInfoFromESDS_MPEG4Audio(
&buffer[4], chunk_data_size - 4);
if (err != OK) {
return err;
}
}
if (mPath.size() >= 2
&& mPath[mPath.size() - 2] == FOURCC("mp4v")) {
// Check if the video is MPEG2
ESDS esds(&buffer[4], chunk_data_size - 4);
uint8_t objectTypeIndication;
if (esds.getObjectTypeIndication(&objectTypeIndication) == OK) {
if (objectTypeIndication >= 0x60 && objectTypeIndication <= 0x65) {
AMediaFormat_setString(mLastTrack->meta,
AMEDIAFORMAT_KEY_MIME, MEDIA_MIMETYPE_VIDEO_MPEG2);
}
}
}
break;
}
case FOURCC("btrt"):
{
*offset += chunk_size;
if (mLastTrack == NULL) {
return ERROR_MALFORMED;
}
uint8_t buffer[12];
if (chunk_data_size != sizeof(buffer)) {
return ERROR_MALFORMED;
}
if (mDataSource->readAt(
data_offset, buffer, chunk_data_size) < chunk_data_size) {
return ERROR_IO;
}
uint32_t maxBitrate = U32_AT(&buffer[4]);
uint32_t avgBitrate = U32_AT(&buffer[8]);
if (maxBitrate > 0 && maxBitrate < INT32_MAX) {
AMediaFormat_setInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_MAX_BIT_RATE, (int32_t)maxBitrate);
}
if (avgBitrate > 0 && avgBitrate < INT32_MAX) {
AMediaFormat_setInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_BIT_RATE, (int32_t)avgBitrate);
}
break;
}
case FOURCC("avcC"):
{
*offset += chunk_size;
auto buffer = heapbuffer<uint8_t>(chunk_data_size);
if (buffer.get() == NULL) {
ALOGE("b/28471206");
return NO_MEMORY;
}
if (mDataSource->readAt(
data_offset, buffer.get(), chunk_data_size) < chunk_data_size) {
return ERROR_IO;
}
if (mLastTrack == NULL)
return ERROR_MALFORMED;
AMediaFormat_setBuffer(mLastTrack->meta,
AMEDIAFORMAT_KEY_CSD_AVC, buffer.get(), chunk_data_size);
break;
}
case FOURCC("hvcC"):
{
auto buffer = heapbuffer<uint8_t>(chunk_data_size);
if (buffer.get() == NULL) {
ALOGE("b/28471206");
return NO_MEMORY;
}
if (mDataSource->readAt(
data_offset, buffer.get(), chunk_data_size) < chunk_data_size) {
return ERROR_IO;
}
if (mLastTrack == NULL)
return ERROR_MALFORMED;
AMediaFormat_setBuffer(mLastTrack->meta,
AMEDIAFORMAT_KEY_CSD_HEVC, buffer.get(), chunk_data_size);
*offset += chunk_size;
break;
}
case FOURCC("av1C"):
{
auto buffer = heapbuffer<uint8_t>(chunk_data_size);
if (buffer.get() == NULL) {
ALOGE("b/28471206");
return NO_MEMORY;
}
if (mDataSource->readAt(
data_offset, buffer.get(), chunk_data_size) < chunk_data_size) {
return ERROR_IO;
}
if (mLastTrack == NULL)
return ERROR_MALFORMED;
AMediaFormat_setBuffer(mLastTrack->meta,
AMEDIAFORMAT_KEY_CSD_0, buffer.get(), chunk_data_size);
*offset += chunk_size;
break;
}
case FOURCC("d263"):
{
*offset += chunk_size;
/*
* d263 contains a fixed 7 bytes part:
* vendor - 4 bytes
* version - 1 byte
* level - 1 byte
* profile - 1 byte
* optionally, "d263" box itself may contain a 16-byte
* bit rate box (bitr)
* average bit rate - 4 bytes
* max bit rate - 4 bytes
*/
char buffer[23];
if (chunk_data_size != 7 &&
chunk_data_size != 23) {
ALOGE("Incorrect D263 box size %lld", (long long)chunk_data_size);
return ERROR_MALFORMED;
}
if (mDataSource->readAt(
data_offset, buffer, chunk_data_size) < chunk_data_size) {
return ERROR_IO;
}
if (mLastTrack == NULL)
return ERROR_MALFORMED;
AMediaFormat_setBuffer(mLastTrack->meta,
AMEDIAFORMAT_KEY_D263, buffer, chunk_data_size);
break;
}
case FOURCC("meta"):
{
off64_t stop_offset = *offset + chunk_size;
*offset = data_offset;
bool isParsingMetaKeys = underQTMetaPath(mPath, 2);
if (!isParsingMetaKeys) {
uint8_t buffer[4];
if (chunk_data_size < (off64_t)sizeof(buffer)) {
*offset = stop_offset;
return ERROR_MALFORMED;
}
if (mDataSource->readAt(
data_offset, buffer, 4) < 4) {
*offset = stop_offset;
return ERROR_IO;
}
if (U32_AT(buffer) != 0) {
// Should be version 0, flags 0.
// If it's not, let's assume this is one of those
// apparently malformed chunks that don't have flags
// and completely different semantics than what's
// in the MPEG4 specs and skip it.
*offset = stop_offset;
return OK;
}
*offset += sizeof(buffer);
}
while (*offset < stop_offset) {
status_t err = parseChunk(offset, depth + 1);
if (err != OK) {
return err;
}
}
if (*offset != stop_offset) {
return ERROR_MALFORMED;
}
break;
}
case FOURCC("iloc"):
case FOURCC("iinf"):
case FOURCC("iprp"):
case FOURCC("pitm"):
case FOURCC("idat"):
case FOURCC("iref"):
case FOURCC("ipro"):
{
if (mIsHeif) {
if (mItemTable == NULL) {
mItemTable = new ItemTable(mDataSource);
}
status_t err = mItemTable->parse(
chunk_type, data_offset, chunk_data_size);
if (err != OK) {
return err;
}
}
*offset += chunk_size;
break;
}
case FOURCC("mean"):
case FOURCC("name"):
case FOURCC("data"):
{
*offset += chunk_size;
if (mPath.size() == 6 && underMetaDataPath(mPath)) {
status_t err = parseITunesMetaData(data_offset, chunk_data_size);
if (err != OK) {
return err;
}
}
break;
}
case FOURCC("mvhd"):
{
*offset += chunk_size;
if (depth != 1) {
ALOGE("mvhd: depth %d", depth);
return ERROR_MALFORMED;
}
if (chunk_data_size < 32) {
return ERROR_MALFORMED;
}
uint8_t header[32];
if (mDataSource->readAt(
data_offset, header, sizeof(header))
< (ssize_t)sizeof(header)) {
return ERROR_IO;
}
uint64_t creationTime;
uint64_t duration = 0;
if (header[0] == 1) {
creationTime = U64_AT(&header[4]);
mHeaderTimescale = U32_AT(&header[20]);
duration = U64_AT(&header[24]);
if (duration == 0xffffffffffffffff) {
duration = 0;
}
} else if (header[0] != 0) {
return ERROR_MALFORMED;
} else {
creationTime = U32_AT(&header[4]);
mHeaderTimescale = U32_AT(&header[12]);
uint32_t d32 = U32_AT(&header[16]);
if (d32 == 0xffffffff) {
d32 = 0;
}
duration = d32;
}
if (duration != 0 && mHeaderTimescale != 0 && duration < UINT64_MAX / 1000000) {
AMediaFormat_setInt64(mFileMetaData,
AMEDIAFORMAT_KEY_DURATION, duration * 1000000 / mHeaderTimescale);
}
String8 s;
if (convertTimeToDate(creationTime, &s)) {
AMediaFormat_setString(mFileMetaData, AMEDIAFORMAT_KEY_DATE, s.string());
}
break;
}
case FOURCC("mehd"):
{
*offset += chunk_size;
if (chunk_data_size < 8) {
return ERROR_MALFORMED;
}
uint8_t flags[4];
if (mDataSource->readAt(
data_offset, flags, sizeof(flags))
< (ssize_t)sizeof(flags)) {
return ERROR_IO;
}
uint64_t duration = 0;
if (flags[0] == 1) {
// 64 bit
if (chunk_data_size < 12) {
return ERROR_MALFORMED;
}
mDataSource->getUInt64(data_offset + 4, &duration);
if (duration == 0xffffffffffffffff) {
duration = 0;
}
} else if (flags[0] == 0) {
// 32 bit
uint32_t d32;
mDataSource->getUInt32(data_offset + 4, &d32);
if (d32 == 0xffffffff) {
d32 = 0;
}
duration = d32;
} else {
return ERROR_MALFORMED;
}
if (duration != 0 && mHeaderTimescale != 0) {
AMediaFormat_setInt64(mFileMetaData,
AMEDIAFORMAT_KEY_DURATION, duration * 1000000 / mHeaderTimescale);
}
break;
}
case FOURCC("mdat"):
{
mMdatFound = true;
*offset += chunk_size;
break;
}
case FOURCC("hdlr"):
{
*offset += chunk_size;
if (underQTMetaPath(mPath, 3)) {
break;
}
uint32_t buffer;
if (mDataSource->readAt(
data_offset + 8, &buffer, 4) < 4) {
return ERROR_IO;
}
uint32_t type = ntohl(buffer);
// For the 3GPP file format, the handler-type within the 'hdlr' box
// shall be 'text'. We also want to support 'sbtl' handler type
// for a practical reason as various MPEG4 containers use it.
if (type == FOURCC("text") || type == FOURCC("sbtl")) {
if (mLastTrack != NULL) {
AMediaFormat_setString(mLastTrack->meta,
AMEDIAFORMAT_KEY_MIME, MEDIA_MIMETYPE_TEXT_3GPP);
}
}
break;
}
case FOURCC("keys"):
{
*offset += chunk_size;
if (underQTMetaPath(mPath, 3)) {
status_t err = parseQTMetaKey(data_offset, chunk_data_size);
if (err != OK) {
return err;
}
}
break;
}
case FOURCC("trex"):
{
*offset += chunk_size;
if (chunk_data_size < 24) {
return ERROR_IO;
}
Trex trex;
if (!mDataSource->getUInt32(data_offset + 4, &trex.track_ID) ||
!mDataSource->getUInt32(data_offset + 8, &trex.default_sample_description_index) ||
!mDataSource->getUInt32(data_offset + 12, &trex.default_sample_duration) ||
!mDataSource->getUInt32(data_offset + 16, &trex.default_sample_size) ||
!mDataSource->getUInt32(data_offset + 20, &trex.default_sample_flags)) {
return ERROR_IO;
}
mTrex.add(trex);
break;
}
case FOURCC("tx3g"):
{
if (mLastTrack == NULL)
return ERROR_MALFORMED;
// complain about ridiculous chunks
if (chunk_size > kMaxAtomSize) {
return ERROR_MALFORMED;
}
// complain about empty atoms
if (chunk_data_size <= 0) {
ALOGE("b/124330204");
android_errorWriteLog(0x534e4554, "124330204");
return ERROR_MALFORMED;
}
// should fill buffer based on "data_offset" and "chunk_data_size"
// instead of *offset and chunk_size;
// but we've been feeding the extra data to consumers for multiple releases and
// if those apps are compensating for it, we'd break them with such a change
//
if (mLastTrack->mTx3gSize - mLastTrack->mTx3gFilled < chunk_size) {
size_t growth = kTx3gGrowth;
if (growth < chunk_size) {
growth = chunk_size;
}
// although this disallows 2 tx3g atoms of nearly kMaxAtomSize...
if ((uint64_t) mLastTrack->mTx3gSize + growth > kMaxAtomSize) {
ALOGE("b/124330204 - too much space");
android_errorWriteLog(0x534e4554, "124330204");
return ERROR_MALFORMED;
}
uint8_t *updated = (uint8_t *)realloc(mLastTrack->mTx3gBuffer,
mLastTrack->mTx3gSize + growth);
if (updated == NULL) {
return ERROR_MALFORMED;
}
mLastTrack->mTx3gBuffer = updated;
mLastTrack->mTx3gSize += growth;
}
if ((size_t)(mDataSource->readAt(*offset,
mLastTrack->mTx3gBuffer + mLastTrack->mTx3gFilled,
chunk_size))
< chunk_size) {
// advance read pointer so we don't end up reading this again
*offset += chunk_size;
return ERROR_IO;
}
mLastTrack->mTx3gFilled += chunk_size;
*offset += chunk_size;
break;
}
case FOURCC("covr"):
{
*offset += chunk_size;
ALOGV("chunk_data_size = %" PRId64 " and data_offset = %" PRId64,
chunk_data_size, data_offset);
if (chunk_data_size < 0 || static_cast<uint64_t>(chunk_data_size) >= SIZE_MAX - 1) {
return ERROR_MALFORMED;
}
auto buffer = heapbuffer<uint8_t>(chunk_data_size);
if (buffer.get() == NULL) {
ALOGE("b/28471206");
return NO_MEMORY;
}
if (mDataSource->readAt(
data_offset, buffer.get(), chunk_data_size) != (ssize_t)chunk_data_size) {
return ERROR_IO;
}
const int kSkipBytesOfDataBox = 16;
if (chunk_data_size <= kSkipBytesOfDataBox) {
return ERROR_MALFORMED;
}
AMediaFormat_setBuffer(mFileMetaData,
AMEDIAFORMAT_KEY_ALBUMART,
buffer.get() + kSkipBytesOfDataBox, chunk_data_size - kSkipBytesOfDataBox);
break;
}
case FOURCC("colr"):
{
*offset += chunk_size;
// this must be in a VisualSampleEntry box under the Sample Description Box ('stsd')
// ignore otherwise
if (depth >= 2 && mPath[depth - 2] == FOURCC("stsd")) {
status_t err = parseColorInfo(data_offset, chunk_data_size);
if (err != OK) {
return err;
}
}
break;
}
case FOURCC("titl"):
case FOURCC("perf"):
case FOURCC("auth"):
case FOURCC("gnre"):
case FOURCC("albm"):
case FOURCC("yrrc"):
{
*offset += chunk_size;
status_t err = parse3GPPMetaData(data_offset, chunk_data_size, depth);
if (err != OK) {
return err;
}
break;
}
case FOURCC("ID32"):
{
*offset += chunk_size;
if (chunk_data_size < 6) {
return ERROR_MALFORMED;
}
parseID3v2MetaData(data_offset + 6);
break;
}
case FOURCC("----"):
{
mLastCommentMean.clear();
mLastCommentName.clear();
mLastCommentData.clear();
*offset += chunk_size;
break;
}
case FOURCC("sidx"):
{
status_t err = parseSegmentIndex(data_offset, chunk_data_size);
if (err != OK) {
return err;
}
*offset += chunk_size;
return UNKNOWN_ERROR; // stop parsing after sidx
}
case FOURCC("ac-3"):
{
*offset += chunk_size;
// bypass ac-3 if parse fail
if (parseAC3SpecificBox(data_offset) != OK) {
if (mLastTrack != NULL) {
ALOGW("Fail to parse ac-3");
mLastTrack->skipTrack = true;
}
}
return OK;
}
case FOURCC("ec-3"):
{
*offset += chunk_size;
// bypass ec-3 if parse fail
if (parseEAC3SpecificBox(data_offset) != OK) {
if (mLastTrack != NULL) {
ALOGW("Fail to parse ec-3");
mLastTrack->skipTrack = true;
}
}
return OK;
}
case FOURCC("ac-4"):
{
*offset += chunk_size;
// bypass ac-4 if parse fail
if (parseAC4SpecificBox(data_offset) != OK) {
if (mLastTrack != NULL) {
ALOGW("Fail to parse ac-4");
mLastTrack->skipTrack = true;
}
}
return OK;
}
case FOURCC("ftyp"):
{
if (chunk_data_size < 8 || depth != 0) {
return ERROR_MALFORMED;
}
off64_t stop_offset = *offset + chunk_size;
uint32_t numCompatibleBrands = (chunk_data_size - 8) / 4;
std::set<uint32_t> brandSet;
for (size_t i = 0; i < numCompatibleBrands + 2; ++i) {
if (i == 1) {
// Skip this index, it refers to the minorVersion,
// not a brand.
continue;
}
uint32_t brand;
if (mDataSource->readAt(data_offset + 4 * i, &brand, 4) < 4) {
return ERROR_MALFORMED;
}
brand = ntohl(brand);
brandSet.insert(brand);
}
if (brandSet.count(FOURCC("qt ")) > 0) {
mIsQT = true;
} else {
if (brandSet.count(FOURCC("mif1")) > 0
&& brandSet.count(FOURCC("heic")) > 0) {
ALOGV("identified HEIF image");
mIsHeif = true;
brandSet.erase(FOURCC("mif1"));
brandSet.erase(FOURCC("heic"));
}
if (!brandSet.empty()) {
// This means that the file should have moov box.
// It could be any iso files (mp4, heifs, etc.)
mHasMoovBox = true;
if (mIsHeif) {
ALOGV("identified HEIF image with other tracks");
}
}
}
*offset = stop_offset;
break;
}
default:
{
// check if we're parsing 'ilst' for meta keys
// if so, treat type as a number (key-id).
if (underQTMetaPath(mPath, 3)) {
status_t err = parseQTMetaVal(chunk_type, data_offset, chunk_data_size);
if (err != OK) {
return err;
}
}
*offset += chunk_size;
break;
}
}
return OK;
}
status_t MPEG4Extractor::parseChannelCountSampleRate(
off64_t *offset, uint16_t *channelCount, uint16_t *sampleRate) {
// skip 16 bytes:
// + 6-byte reserved,
// + 2-byte data reference index,
// + 8-byte reserved
*offset += 16;
if (!mDataSource->getUInt16(*offset, channelCount)) {
ALOGE("MPEG4Extractor: error while reading sample entry box: cannot read channel count");
return ERROR_MALFORMED;
}
// skip 8 bytes:
// + 2-byte channelCount,
// + 2-byte sample size,
// + 4-byte reserved
*offset += 8;
if (!mDataSource->getUInt16(*offset, sampleRate)) {
ALOGE("MPEG4Extractor: error while reading sample entry box: cannot read sample rate");
return ERROR_MALFORMED;
}
// skip 4 bytes:
// + 2-byte sampleRate,
// + 2-byte reserved
*offset += 4;
return OK;
}
status_t MPEG4Extractor::parseAC4SpecificBox(off64_t offset) {
if (mLastTrack == NULL) {
return ERROR_MALFORMED;
}
uint16_t sampleRate, channelCount;
status_t status;
if ((status = parseChannelCountSampleRate(&offset, &channelCount, &sampleRate)) != OK) {
return status;
}
uint32_t size;
// + 4-byte size
// + 4-byte type
// + 3-byte payload
const uint32_t kAC4MinimumBoxSize = 4 + 4 + 3;
if (!mDataSource->getUInt32(offset, &size) || size < kAC4MinimumBoxSize) {
ALOGE("MPEG4Extractor: error while reading ac-4 block: cannot read specific box size");
return ERROR_MALFORMED;
}
// + 4-byte size
offset += 4;
uint32_t type;
if (!mDataSource->getUInt32(offset, &type) || type != FOURCC("dac4")) {
ALOGE("MPEG4Extractor: error while reading ac-4 specific block: header not dac4");
return ERROR_MALFORMED;
}
// + 4-byte type
offset += 4;
const uint32_t kAC4SpecificBoxPayloadSize = 1176;
uint8_t chunk[kAC4SpecificBoxPayloadSize];
ssize_t dsiSize = size - 8; // size of box - size and type fields
if (dsiSize >= (ssize_t)kAC4SpecificBoxPayloadSize ||
mDataSource->readAt(offset, chunk, dsiSize) != dsiSize) {
ALOGE("MPEG4Extractor: error while reading ac-4 specific block: bitstream fields");
return ERROR_MALFORMED;
}
// + size-byte payload
offset += dsiSize;
ABitReader br(chunk, dsiSize);
AC4DSIParser parser(br);
if (!parser.parse()){
ALOGE("MPEG4Extractor: error while parsing ac-4 specific block");
return ERROR_MALFORMED;
}
AMediaFormat_setString(mLastTrack->meta, AMEDIAFORMAT_KEY_MIME, MEDIA_MIMETYPE_AUDIO_AC4);
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_CHANNEL_COUNT, channelCount);
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_SAMPLE_RATE, sampleRate);
AudioPresentationCollection presentations;
// translate the AC4 presentation information to audio presentations for this track
AC4DSIParser::AC4Presentations ac4Presentations = parser.getPresentations();
if (!ac4Presentations.empty()) {
for (const auto& ac4Presentation : ac4Presentations) {
auto& presentation = ac4Presentation.second;
if (!presentation.mEnabled) {
continue;
}
AudioPresentationV1 ap;
ap.mPresentationId = presentation.mGroupIndex;
ap.mProgramId = presentation.mProgramID;
ap.mLanguage = presentation.mLanguage;
if (presentation.mPreVirtualized) {
ap.mMasteringIndication = MASTERED_FOR_HEADPHONE;
} else {
switch (presentation.mChannelMode) {
case AC4Parser::AC4Presentation::kChannelMode_Mono:
case AC4Parser::AC4Presentation::kChannelMode_Stereo:
ap.mMasteringIndication = MASTERED_FOR_STEREO;
break;
case AC4Parser::AC4Presentation::kChannelMode_3_0:
case AC4Parser::AC4Presentation::kChannelMode_5_0:
case AC4Parser::AC4Presentation::kChannelMode_5_1:
case AC4Parser::AC4Presentation::kChannelMode_7_0_34:
case AC4Parser::AC4Presentation::kChannelMode_7_1_34:
case AC4Parser::AC4Presentation::kChannelMode_7_0_52:
case AC4Parser::AC4Presentation::kChannelMode_7_1_52:
ap.mMasteringIndication = MASTERED_FOR_SURROUND;
break;
case AC4Parser::AC4Presentation::kChannelMode_7_0_322:
case AC4Parser::AC4Presentation::kChannelMode_7_1_322:
case AC4Parser::AC4Presentation::kChannelMode_7_0_4:
case AC4Parser::AC4Presentation::kChannelMode_7_1_4:
case AC4Parser::AC4Presentation::kChannelMode_9_0_4:
case AC4Parser::AC4Presentation::kChannelMode_9_1_4:
case AC4Parser::AC4Presentation::kChannelMode_22_2:
ap.mMasteringIndication = MASTERED_FOR_3D;
break;
default:
ALOGE("Invalid channel mode in AC4 presentation");
return ERROR_MALFORMED;
}
}
ap.mAudioDescriptionAvailable = (presentation.mContentClassifier ==
AC4Parser::AC4Presentation::kVisuallyImpaired);
ap.mSpokenSubtitlesAvailable = (presentation.mContentClassifier ==
AC4Parser::AC4Presentation::kVoiceOver);
ap.mDialogueEnhancementAvailable = presentation.mHasDialogEnhancements;
if (!ap.mLanguage.empty()) {
ap.mLabels.emplace(ap.mLanguage, presentation.mDescription);
}
presentations.push_back(std::move(ap));
}
}
if (presentations.empty()) {
// Clear audio presentation info in metadata.
AMediaFormat_setBuffer(
mLastTrack->meta, AMEDIAFORMAT_KEY_AUDIO_PRESENTATION_INFO, nullptr, 0);
} else {
std::ostringstream outStream(std::ios::out);
serializeAudioPresentations(presentations, &outStream);
AMediaFormat_setBuffer(
mLastTrack->meta, AMEDIAFORMAT_KEY_AUDIO_PRESENTATION_INFO,
outStream.str().data(), outStream.str().size());
}
return OK;
}
status_t MPEG4Extractor::parseEAC3SpecificBox(off64_t offset) {
if (mLastTrack == NULL) {
return ERROR_MALFORMED;
}
uint16_t sampleRate, channels;
status_t status;
if ((status = parseChannelCountSampleRate(&offset, &channels, &sampleRate)) != OK) {
return status;
}
uint32_t size;
// + 4-byte size
// + 4-byte type
// + 3-byte payload
const uint32_t kEAC3SpecificBoxMinSize = 11;
// 13 + 3 + (8 * (2 + 5 + 5 + 3 + 1 + 3 + 4 + (14 * 9 + 1))) bits == 152 bytes theoretical max
// calculated from the required bits read below as well as the maximum number of independent
// and dependant sub streams you can have
const uint32_t kEAC3SpecificBoxMaxSize = 152;
if (!mDataSource->getUInt32(offset, &size) ||
size < kEAC3SpecificBoxMinSize ||
size > kEAC3SpecificBoxMaxSize) {
ALOGE("MPEG4Extractor: error while reading eac-3 block: cannot read specific box size");
return ERROR_MALFORMED;
}
offset += 4;
uint32_t type;
if (!mDataSource->getUInt32(offset, &type) || type != FOURCC("dec3")) {
ALOGE("MPEG4Extractor: error while reading eac-3 specific block: header not dec3");
return ERROR_MALFORMED;
}
offset += 4;
uint8_t* chunk = new (std::nothrow) uint8_t[size];
if (chunk == NULL) {
return ERROR_MALFORMED;
}
if (mDataSource->readAt(offset, chunk, size) != (ssize_t)size) {
ALOGE("MPEG4Extractor: error while reading eac-3 specific block: bitstream fields");
delete[] chunk;
return ERROR_MALFORMED;
}
ABitReader br(chunk, size);
static const unsigned channelCountTable[] = {2, 1, 2, 3, 3, 4, 4, 5};
static const unsigned sampleRateTable[] = {48000, 44100, 32000};
if (br.numBitsLeft() < 16) {
delete[] chunk;
return ERROR_MALFORMED;
}
unsigned data_rate = br.getBits(13);
ALOGV("EAC3 data rate = %d", data_rate);
unsigned num_ind_sub = br.getBits(3) + 1;
ALOGV("EAC3 independant substreams = %d", num_ind_sub);
if (br.numBitsLeft() < (num_ind_sub * 23)) {
delete[] chunk;
return ERROR_MALFORMED;
}
unsigned channelCount = 0;
for (unsigned i = 0; i < num_ind_sub; i++) {
unsigned fscod = br.getBits(2);
if (fscod == 3) {
ALOGE("Incorrect fscod (3) in EAC3 header");
delete[] chunk;
return ERROR_MALFORMED;
}
unsigned boxSampleRate = sampleRateTable[fscod];
if (boxSampleRate != sampleRate) {
ALOGE("sample rate mismatch: boxSampleRate = %d, sampleRate = %d",
boxSampleRate, sampleRate);
delete[] chunk;
return ERROR_MALFORMED;
}
unsigned bsid = br.getBits(5);
if (bsid == 9 || bsid == 10) {
ALOGW("EAC3 stream (bsid=%d) may be silenced by the decoder", bsid);
} else if (bsid > 16) {
ALOGE("EAC3 stream (bsid=%d) is not compatible with ETSI TS 102 366 v1.4.1", bsid);
delete[] chunk;
return ERROR_MALFORMED;
}
// skip
br.skipBits(2);
unsigned bsmod = br.getBits(3);
unsigned acmod = br.getBits(3);
unsigned lfeon = br.getBits(1);
// we currently only support the first stream
if (i == 0)
channelCount = channelCountTable[acmod] + lfeon;
ALOGV("bsmod = %d, acmod = %d, lfeon = %d", bsmod, acmod, lfeon);
br.skipBits(3);
unsigned num_dep_sub = br.getBits(4);
ALOGV("EAC3 dependant substreams = %d", num_dep_sub);
if (num_dep_sub != 0) {
if (br.numBitsLeft() < 9) {
delete[] chunk;
return ERROR_MALFORMED;
}
static const char* chan_loc_tbl[] = { "Lc/Rc","Lrs/Rrs","Cs","Ts","Lsd/Rsd",
"Lw/Rw","Lvh/Rvh","Cvh","Lfe2" };
unsigned chan_loc = br.getBits(9);
unsigned mask = 1;
for (unsigned j = 0; j < 9; j++, mask <<= 1) {
if ((chan_loc & mask) != 0) {
// we currently only support the first stream
if (i == 0) {
channelCount++;
// these are 2 channels in the mask
if (j == 0 || j == 1 || j == 4 || j == 5 || j == 6) {
channelCount++;
}
}
ALOGV(" %s", chan_loc_tbl[j]);
}
}
} else {
if (br.numBitsLeft() == 0) {
delete[] chunk;
return ERROR_MALFORMED;
}
br.skipBits(1);
}
}
if (br.numBitsLeft() != 0) {
if (br.numBitsLeft() < 8) {
delete[] chunk;
return ERROR_MALFORMED;
}
unsigned mask = br.getBits(8);
for (unsigned i = 0; i < 8; i++) {
if (((0x1 << i) && mask) == 0)
continue;
if (br.numBitsLeft() < 8) {
delete[] chunk;
return ERROR_MALFORMED;
}
switch (i) {
case 0: {
unsigned complexity = br.getBits(8);
ALOGV("Found a JOC stream with complexity = %d", complexity);
}break;
default: {
br.skipBits(8);
}break;
}
}
}
AMediaFormat_setString(mLastTrack->meta, AMEDIAFORMAT_KEY_MIME, MEDIA_MIMETYPE_AUDIO_EAC3);
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_CHANNEL_COUNT, channelCount);
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_SAMPLE_RATE, sampleRate);
delete[] chunk;
return OK;
}
status_t MPEG4Extractor::parseAC3SpecificBox(off64_t offset) {
if (mLastTrack == NULL) {
return ERROR_MALFORMED;
}
uint16_t sampleRate, channels;
status_t status;
if ((status = parseChannelCountSampleRate(&offset, &channels, &sampleRate)) != OK) {
return status;
}
uint32_t size;
// + 4-byte size
// + 4-byte type
// + 3-byte payload
const uint32_t kAC3SpecificBoxSize = 11;
if (!mDataSource->getUInt32(offset, &size) || size < kAC3SpecificBoxSize) {
ALOGE("MPEG4Extractor: error while reading ac-3 block: cannot read specific box size");
return ERROR_MALFORMED;
}
offset += 4;
uint32_t type;
if (!mDataSource->getUInt32(offset, &type) || type != FOURCC("dac3")) {
ALOGE("MPEG4Extractor: error while reading ac-3 specific block: header not dac3");
return ERROR_MALFORMED;
}
offset += 4;
const uint32_t kAC3SpecificBoxPayloadSize = 3;
uint8_t chunk[kAC3SpecificBoxPayloadSize];
if (mDataSource->readAt(offset, chunk, sizeof(chunk)) != sizeof(chunk)) {
ALOGE("MPEG4Extractor: error while reading ac-3 specific block: bitstream fields");
return ERROR_MALFORMED;
}
ABitReader br(chunk, sizeof(chunk));
static const unsigned channelCountTable[] = {2, 1, 2, 3, 3, 4, 4, 5};
static const unsigned sampleRateTable[] = {48000, 44100, 32000};
unsigned fscod = br.getBits(2);
if (fscod == 3) {
ALOGE("Incorrect fscod (3) in AC3 header");
return ERROR_MALFORMED;
}
unsigned boxSampleRate = sampleRateTable[fscod];
if (boxSampleRate != sampleRate) {
ALOGE("sample rate mismatch: boxSampleRate = %d, sampleRate = %d",
boxSampleRate, sampleRate);
return ERROR_MALFORMED;
}
unsigned bsid = br.getBits(5);
if (bsid > 8) {
ALOGW("Incorrect bsid in AC3 header. Possibly E-AC-3?");
return ERROR_MALFORMED;
}
// skip
unsigned bsmod __unused = br.getBits(3);
unsigned acmod = br.getBits(3);
unsigned lfeon = br.getBits(1);
unsigned channelCount = channelCountTable[acmod] + lfeon;
AMediaFormat_setString(mLastTrack->meta, AMEDIAFORMAT_KEY_MIME, MEDIA_MIMETYPE_AUDIO_AC3);
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_CHANNEL_COUNT, channelCount);
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_SAMPLE_RATE, sampleRate);
return OK;
}
status_t MPEG4Extractor::parseALACSampleEntry(off64_t *offset) {
// See 'external/alac/ALACMagicCookieDescription.txt for the detail'.
// Store ALAC magic cookie (decoder needs it).
uint8_t alacInfo[12];
off64_t data_offset = *offset;
if (mDataSource->readAt(
data_offset, alacInfo, sizeof(alacInfo)) < (ssize_t)sizeof(alacInfo)) {
return ERROR_IO;
}
uint32_t size = U32_AT(&alacInfo[0]);
if ((size != ALAC_SPECIFIC_INFO_SIZE) ||
(U32_AT(&alacInfo[4]) != FOURCC("alac")) ||
(U32_AT(&alacInfo[8]) != 0)) {
ALOGV("Size:%u, U32_AT(&alacInfo[4]):%u, U32_AT(&alacInfo[8]):%u",
size, U32_AT(&alacInfo[4]), U32_AT(&alacInfo[8]));
return ERROR_MALFORMED;
}
data_offset += sizeof(alacInfo);
uint8_t cookie[size - sizeof(alacInfo)];
if (mDataSource->readAt(
data_offset, cookie, sizeof(cookie)) < (ssize_t)sizeof(cookie)) {
return ERROR_IO;
}
uint8_t bitsPerSample = cookie[5];
AMediaFormat_setInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_BITS_PER_SAMPLE, bitsPerSample);
AMediaFormat_setInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_CHANNEL_COUNT, cookie[9]);
AMediaFormat_setInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_SAMPLE_RATE, U32_AT(&cookie[20]));
AMediaFormat_setBuffer(mLastTrack->meta,
AMEDIAFORMAT_KEY_CSD_0, cookie, sizeof(cookie));
data_offset += sizeof(cookie);
*offset = data_offset;
return OK;
}
status_t MPEG4Extractor::parseSegmentIndex(off64_t offset, size_t size) {
ALOGV("MPEG4Extractor::parseSegmentIndex");
if (size < 12) {
return -EINVAL;
}
uint32_t flags;
if (!mDataSource->getUInt32(offset, &flags)) {
return ERROR_MALFORMED;
}
uint32_t version = flags >> 24;
flags &= 0xffffff;
ALOGV("sidx version %d", version);
uint32_t referenceId;
if (!mDataSource->getUInt32(offset + 4, &referenceId)) {
return ERROR_MALFORMED;
}
uint32_t timeScale;
if (!mDataSource->getUInt32(offset + 8, &timeScale)) {
return ERROR_MALFORMED;
}
ALOGV("sidx refid/timescale: %d/%d", referenceId, timeScale);
if (timeScale == 0)
return ERROR_MALFORMED;
uint64_t earliestPresentationTime;
uint64_t firstOffset;
offset += 12;
size -= 12;
if (version == 0) {
if (size < 8) {
return -EINVAL;
}
uint32_t tmp;
if (!mDataSource->getUInt32(offset, &tmp)) {
return ERROR_MALFORMED;
}
earliestPresentationTime = tmp;
if (!mDataSource->getUInt32(offset + 4, &tmp)) {
return ERROR_MALFORMED;
}
firstOffset = tmp;
offset += 8;
size -= 8;
} else {
if (size < 16) {
return -EINVAL;
}
if (!mDataSource->getUInt64(offset, &earliestPresentationTime)) {
return ERROR_MALFORMED;
}
if (!mDataSource->getUInt64(offset + 8, &firstOffset)) {
return ERROR_MALFORMED;
}
offset += 16;
size -= 16;
}
ALOGV("sidx pres/off: %" PRIu64 "/%" PRIu64, earliestPresentationTime, firstOffset);
if (size < 4) {
return -EINVAL;
}
uint16_t referenceCount;
if (!mDataSource->getUInt16(offset + 2, &referenceCount)) {
return ERROR_MALFORMED;
}
offset += 4;
size -= 4;
ALOGV("refcount: %d", referenceCount);
if (size < referenceCount * 12) {
return -EINVAL;
}
uint64_t total_duration = 0;
for (unsigned int i = 0; i < referenceCount; i++) {
uint32_t d1, d2, d3;
if (!mDataSource->getUInt32(offset, &d1) || // size
!mDataSource->getUInt32(offset + 4, &d2) || // duration
!mDataSource->getUInt32(offset + 8, &d3)) { // flags
return ERROR_MALFORMED;
}
if (d1 & 0x80000000) {
ALOGW("sub-sidx boxes not supported yet");
}
bool sap = d3 & 0x80000000;
uint32_t saptype = (d3 >> 28) & 7;
if (!sap || (saptype != 1 && saptype != 2)) {
// type 1 and 2 are sync samples
ALOGW("not a stream access point, or unsupported type: %08x", d3);
}
total_duration += d2;
offset += 12;
ALOGV(" item %d, %08x %08x %08x", i, d1, d2, d3);
SidxEntry se;
se.mSize = d1 & 0x7fffffff;
se.mDurationUs = 1000000LL * d2 / timeScale;
mSidxEntries.add(se);
}
uint64_t sidxDuration = total_duration * 1000000 / timeScale;
if (mLastTrack == NULL)
return ERROR_MALFORMED;
int64_t metaDuration;
if (!AMediaFormat_getInt64(mLastTrack->meta,
AMEDIAFORMAT_KEY_DURATION, &metaDuration) || metaDuration == 0) {
AMediaFormat_setInt64(mLastTrack->meta, AMEDIAFORMAT_KEY_DURATION, sidxDuration);
}
return OK;
}
status_t MPEG4Extractor::parseQTMetaKey(off64_t offset, size_t size) {
if (size < 8) {
return ERROR_MALFORMED;
}
uint32_t count;
if (!mDataSource->getUInt32(offset + 4, &count)) {
return ERROR_MALFORMED;
}
if (mMetaKeyMap.size() > 0) {
ALOGW("'keys' atom seen again, discarding existing entries");
mMetaKeyMap.clear();
}
off64_t keyOffset = offset + 8;
off64_t stopOffset = offset + size;
for (size_t i = 1; i <= count; i++) {
if (keyOffset + 8 > stopOffset) {
return ERROR_MALFORMED;
}
uint32_t keySize;
if (!mDataSource->getUInt32(keyOffset, &keySize)
|| keySize < 8
|| keyOffset + keySize > stopOffset) {
return ERROR_MALFORMED;
}
uint32_t type;
if (!mDataSource->getUInt32(keyOffset + 4, &type)
|| type != FOURCC("mdta")) {
return ERROR_MALFORMED;
}
keySize -= 8;
keyOffset += 8;
auto keyData = heapbuffer<uint8_t>(keySize);
if (keyData.get() == NULL) {
return ERROR_MALFORMED;
}
if (mDataSource->readAt(
keyOffset, keyData.get(), keySize) < (ssize_t) keySize) {
return ERROR_MALFORMED;
}
AString key((const char *)keyData.get(), keySize);
mMetaKeyMap.add(i, key);
keyOffset += keySize;
}
return OK;
}
status_t MPEG4Extractor::parseQTMetaVal(
int32_t keyId, off64_t offset, size_t size) {
ssize_t index = mMetaKeyMap.indexOfKey(keyId);
if (index < 0) {
// corresponding key is not present, ignore
return ERROR_MALFORMED;
}
if (size <= 16) {
return ERROR_MALFORMED;
}
uint32_t dataSize;
if (!mDataSource->getUInt32(offset, &dataSize)
|| dataSize > size || dataSize <= 16) {
return ERROR_MALFORMED;
}
uint32_t atomFourCC;
if (!mDataSource->getUInt32(offset + 4, &atomFourCC)
|| atomFourCC != FOURCC("data")) {
return ERROR_MALFORMED;
}
uint32_t dataType;
if (!mDataSource->getUInt32(offset + 8, &dataType)
|| ((dataType & 0xff000000) != 0)) {
// not well-known type
return ERROR_MALFORMED;
}
dataSize -= 16;
offset += 16;
if (dataType == 23 && dataSize >= 4) {
// BE Float32
uint32_t val;
if (!mDataSource->getUInt32(offset, &val)) {
return ERROR_MALFORMED;
}
if (!strcasecmp(mMetaKeyMap[index].c_str(), "com.android.capture.fps")) {
AMediaFormat_setFloat(mFileMetaData, AMEDIAFORMAT_KEY_CAPTURE_RATE, *(float *)&val);
}
} else if (dataType == 67 && dataSize >= 4) {
// BE signed int32
uint32_t val;
if (!mDataSource->getUInt32(offset, &val)) {
return ERROR_MALFORMED;
}
if (!strcasecmp(mMetaKeyMap[index].c_str(), "com.android.video.temporal_layers_count")) {
AMediaFormat_setInt32(mFileMetaData,
AMEDIAFORMAT_KEY_TEMPORAL_LAYER_COUNT, val);
}
} else {
// add more keys if needed
ALOGV("ignoring key: type %d, size %d", dataType, dataSize);
}
return OK;
}
status_t MPEG4Extractor::parseTrackHeader(
off64_t data_offset, off64_t data_size) {
if (data_size < 4) {
return ERROR_MALFORMED;
}
uint8_t version;
if (mDataSource->readAt(data_offset, &version, 1) < 1) {
return ERROR_IO;
}
size_t dynSize = (version == 1) ? 36 : 24;
uint8_t buffer[36 + 60];
if (data_size != (off64_t)dynSize + 60) {
return ERROR_MALFORMED;
}
if (mDataSource->readAt(
data_offset, buffer, data_size) < (ssize_t)data_size) {
return ERROR_IO;
}
uint64_t ctime __unused, mtime __unused, duration __unused;
int32_t id;
if (version == 1) {
ctime = U64_AT(&buffer[4]);
mtime = U64_AT(&buffer[12]);
id = U32_AT(&buffer[20]);
duration = U64_AT(&buffer[28]);
} else if (version == 0) {
ctime = U32_AT(&buffer[4]);
mtime = U32_AT(&buffer[8]);
id = U32_AT(&buffer[12]);
duration = U32_AT(&buffer[20]);
} else {
return ERROR_UNSUPPORTED;
}
if (mLastTrack == NULL)
return ERROR_MALFORMED;
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_TRACK_ID, id);
size_t matrixOffset = dynSize + 16;
int32_t a00 = U32_AT(&buffer[matrixOffset]);
int32_t a01 = U32_AT(&buffer[matrixOffset + 4]);
int32_t a10 = U32_AT(&buffer[matrixOffset + 12]);
int32_t a11 = U32_AT(&buffer[matrixOffset + 16]);
#if 0
int32_t dx = U32_AT(&buffer[matrixOffset + 8]);
int32_t dy = U32_AT(&buffer[matrixOffset + 20]);
ALOGI("x' = %.2f * x + %.2f * y + %.2f",
a00 / 65536.0f, a01 / 65536.0f, dx / 65536.0f);
ALOGI("y' = %.2f * x + %.2f * y + %.2f",
a10 / 65536.0f, a11 / 65536.0f, dy / 65536.0f);
#endif
uint32_t rotationDegrees;
static const int32_t kFixedOne = 0x10000;
if (a00 == kFixedOne && a01 == 0 && a10 == 0 && a11 == kFixedOne) {
// Identity, no rotation
rotationDegrees = 0;
} else if (a00 == 0 && a01 == kFixedOne && a10 == -kFixedOne && a11 == 0) {
rotationDegrees = 90;
} else if (a00 == 0 && a01 == -kFixedOne && a10 == kFixedOne && a11 == 0) {
rotationDegrees = 270;
} else if (a00 == -kFixedOne && a01 == 0 && a10 == 0 && a11 == -kFixedOne) {
rotationDegrees = 180;
} else {
ALOGW("We only support 0,90,180,270 degree rotation matrices");
rotationDegrees = 0;
}
if (rotationDegrees != 0) {
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_ROTATION, rotationDegrees);
}
// Handle presentation display size, which could be different
// from the image size indicated by AMEDIAFORMAT_KEY_WIDTH and AMEDIAFORMAT_KEY_HEIGHT.
uint32_t width = U32_AT(&buffer[dynSize + 52]);
uint32_t height = U32_AT(&buffer[dynSize + 56]);
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_DISPLAY_WIDTH, width >> 16);
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_DISPLAY_HEIGHT, height >> 16);
return OK;
}
status_t MPEG4Extractor::parseITunesMetaData(off64_t offset, size_t size) {
if (size == 0) {
return OK;
}
if (size < 4 || size == SIZE_MAX) {
return ERROR_MALFORMED;
}
uint8_t *buffer = new (std::nothrow) uint8_t[size + 1];
if (buffer == NULL) {
return ERROR_MALFORMED;
}
if (mDataSource->readAt(
offset, buffer, size) != (ssize_t)size) {
delete[] buffer;
buffer = NULL;
return ERROR_IO;
}
uint32_t flags = U32_AT(buffer);
const char *metadataKey = nullptr;
char chunk[5];
MakeFourCCString(mPath[4], chunk);
ALOGV("meta: %s @ %lld", chunk, (long long)offset);
switch ((int32_t)mPath[4]) {
case FOURCC("\251alb"):
{
metadataKey = "album";
break;
}
case FOURCC("\251ART"):
{
metadataKey = "artist";
break;
}
case FOURCC("aART"):
{
metadataKey = "albumartist";
break;
}
case FOURCC("\251day"):
{
metadataKey = "year";
break;
}
case FOURCC("\251nam"):
{
metadataKey = "title";
break;
}
case FOURCC("\251wrt"):
{
metadataKey = "writer";
break;
}
case FOURCC("covr"):
{
metadataKey = "albumart";
break;
}
case FOURCC("gnre"):
case FOURCC("\251gen"):
{
metadataKey = "genre";
break;
}
case FOURCC("cpil"):
{
if (size == 9 && flags == 21) {
char tmp[16];
sprintf(tmp, "%d",
(int)buffer[size - 1]);
AMediaFormat_setString(mFileMetaData, AMEDIAFORMAT_KEY_COMPILATION, tmp);
}
break;
}
case FOURCC("trkn"):
{
if (size == 16 && flags == 0) {
char tmp[16];
uint16_t* pTrack = (uint16_t*)&buffer[10];
uint16_t* pTotalTracks = (uint16_t*)&buffer[12];
sprintf(tmp, "%d/%d", ntohs(*pTrack), ntohs(*pTotalTracks));
AMediaFormat_setString(mFileMetaData, AMEDIAFORMAT_KEY_CDTRACKNUMBER, tmp);
}
break;
}
case FOURCC("disk"):
{
if ((size == 14 || size == 16) && flags == 0) {
char tmp[16];
uint16_t* pDisc = (uint16_t*)&buffer[10];
uint16_t* pTotalDiscs = (uint16_t*)&buffer[12];
sprintf(tmp, "%d/%d", ntohs(*pDisc), ntohs(*pTotalDiscs));
AMediaFormat_setString(mFileMetaData, AMEDIAFORMAT_KEY_DISCNUMBER, tmp);
}
break;
}
case FOURCC("----"):
{
buffer[size] = '\0';
switch (mPath[5]) {
case FOURCC("mean"):
mLastCommentMean.setTo((const char *)buffer + 4);
break;
case FOURCC("name"):
mLastCommentName.setTo((const char *)buffer + 4);
break;
case FOURCC("data"):
if (size < 8) {
delete[] buffer;
buffer = NULL;
ALOGE("b/24346430");
return ERROR_MALFORMED;
}
mLastCommentData.setTo((const char *)buffer + 8);
break;
}
// Once we have a set of mean/name/data info, go ahead and process
// it to see if its something we are interested in. Whether or not
// were are interested in the specific tag, make sure to clear out
// the set so we can be ready to process another tuple should one
// show up later in the file.
if ((mLastCommentMean.length() != 0) &&
(mLastCommentName.length() != 0) &&
(mLastCommentData.length() != 0)) {
if (mLastCommentMean == "com.apple.iTunes"
&& mLastCommentName == "iTunSMPB") {
int32_t delay, padding;
if (sscanf(mLastCommentData,
" %*x %x %x %*x", &delay, &padding) == 2) {
if (mLastTrack == NULL) {
delete[] buffer;
return ERROR_MALFORMED;
}
AMediaFormat_setInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_ENCODER_DELAY, delay);
AMediaFormat_setInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_ENCODER_PADDING, padding);
}
}
mLastCommentMean.clear();
mLastCommentName.clear();
mLastCommentData.clear();
}
break;
}
default:
break;
}
void *tmpData;
size_t tmpDataSize;
const char *s;
if (size >= 8 && metadataKey &&
!AMediaFormat_getBuffer(mFileMetaData, metadataKey, &tmpData, &tmpDataSize) &&
!AMediaFormat_getString(mFileMetaData, metadataKey, &s)) {
if (!strcmp(metadataKey, "albumart")) {
AMediaFormat_setBuffer(mFileMetaData, metadataKey,
buffer + 8, size - 8);
} else if (!strcmp(metadataKey, "genre")) {
if (flags == 0) {
// uint8_t genre code, iTunes genre codes are
// the standard id3 codes, except they start
// at 1 instead of 0 (e.g. Pop is 14, not 13)
// We use standard id3 numbering, so subtract 1.
int genrecode = (int)buffer[size - 1];
genrecode--;
if (genrecode < 0) {
genrecode = 255; // reserved for 'unknown genre'
}
char genre[10];
sprintf(genre, "%d", genrecode);
AMediaFormat_setString(mFileMetaData, metadataKey, genre);
} else if (flags == 1) {
// custom genre string
buffer[size] = '\0';
AMediaFormat_setString(mFileMetaData,
metadataKey, (const char *)buffer + 8);
}
} else {
buffer[size] = '\0';
AMediaFormat_setString(mFileMetaData,
metadataKey, (const char *)buffer + 8);
}
}
delete[] buffer;
buffer = NULL;
return OK;
}
status_t MPEG4Extractor::parseColorInfo(off64_t offset, size_t size) {
if (size < 4 || size == SIZE_MAX || mLastTrack == NULL) {
return ERROR_MALFORMED;
}
uint8_t *buffer = new (std::nothrow) uint8_t[size + 1];
if (buffer == NULL) {
return ERROR_MALFORMED;
}
if (mDataSource->readAt(offset, buffer, size) != (ssize_t)size) {
delete[] buffer;
buffer = NULL;
return ERROR_IO;
}
int32_t type = U32_AT(&buffer[0]);
if ((type == FOURCC("nclx") && size >= 11)
|| (type == FOURCC("nclc") && size >= 10)) {
// only store the first color specification
int32_t existingColor;
if (!AMediaFormat_getInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_COLOR_RANGE, &existingColor)) {
int32_t primaries = U16_AT(&buffer[4]);
int32_t isotransfer = U16_AT(&buffer[6]);
int32_t coeffs = U16_AT(&buffer[8]);
bool fullRange = (type == FOURCC("nclx")) && (buffer[10] & 128);
int32_t range = 0;
int32_t standard = 0;
int32_t transfer = 0;
ColorUtils::convertIsoColorAspectsToPlatformAspects(
primaries, isotransfer, coeffs, fullRange,
&range, &standard, &transfer);
if (range != 0) {
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_COLOR_RANGE, range);
}
if (standard != 0) {
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_COLOR_STANDARD, standard);
}
if (transfer != 0) {
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_COLOR_TRANSFER, transfer);
}
}
}
delete[] buffer;
buffer = NULL;
return OK;
}
status_t MPEG4Extractor::parse3GPPMetaData(off64_t offset, size_t size, int depth) {
if (size < 4 || size == SIZE_MAX) {
return ERROR_MALFORMED;
}
uint8_t *buffer = new (std::nothrow) uint8_t[size + 1];
if (buffer == NULL) {
return ERROR_MALFORMED;
}
if (mDataSource->readAt(
offset, buffer, size) != (ssize_t)size) {
delete[] buffer;
buffer = NULL;
return ERROR_IO;
}
const char *metadataKey = nullptr;
switch (mPath[depth]) {
case FOURCC("titl"):
{
metadataKey = "title";
break;
}
case FOURCC("perf"):
{
metadataKey = "artist";
break;
}
case FOURCC("auth"):
{
metadataKey = "writer";
break;
}
case FOURCC("gnre"):
{
metadataKey = "genre";
break;
}
case FOURCC("albm"):
{
if (buffer[size - 1] != '\0') {
char tmp[4];
sprintf(tmp, "%u", buffer[size - 1]);
AMediaFormat_setString(mFileMetaData, AMEDIAFORMAT_KEY_CDTRACKNUMBER, tmp);
}
metadataKey = "album";
break;
}
case FOURCC("yrrc"):
{
if (size < 6) {
delete[] buffer;
buffer = NULL;
ALOGE("b/62133227");
android_errorWriteLog(0x534e4554, "62133227");
return ERROR_MALFORMED;
}
char tmp[5];
uint16_t year = U16_AT(&buffer[4]);
if (year < 10000) {
sprintf(tmp, "%u", year);
AMediaFormat_setString(mFileMetaData, AMEDIAFORMAT_KEY_YEAR, tmp);
}
break;
}
default:
break;
}
if (metadataKey) {
bool isUTF8 = true; // Common case
char16_t *framedata = NULL;
int len16 = 0; // Number of UTF-16 characters
// smallest possible valid UTF-16 string w BOM: 0xfe 0xff 0x00 0x00
if (size < 6) {
delete[] buffer;
buffer = NULL;
return ERROR_MALFORMED;
}
if (size - 6 >= 4) {
len16 = ((size - 6) / 2) - 1; // don't include 0x0000 terminator
framedata = (char16_t *)(buffer + 6);
if (0xfffe == *framedata) {
// endianness marker (BOM) doesn't match host endianness
for (int i = 0; i < len16; i++) {
framedata[i] = bswap_16(framedata[i]);
}
// BOM is now swapped to 0xfeff, we will execute next block too
}
if (0xfeff == *framedata) {
// Remove the BOM
framedata++;
len16--;
isUTF8 = false;
}
// else normal non-zero-length UTF-8 string
// we can't handle UTF-16 without BOM as there is no other
// indication of encoding.
}
if (isUTF8) {
buffer[size] = 0;
AMediaFormat_setString(mFileMetaData, metadataKey, (const char *)buffer + 6);
} else {
// Convert from UTF-16 string to UTF-8 string.
String8 tmpUTF8str(framedata, len16);
AMediaFormat_setString(mFileMetaData, metadataKey, tmpUTF8str.string());
}
}
delete[] buffer;
buffer = NULL;
return OK;
}
void MPEG4Extractor::parseID3v2MetaData(off64_t offset) {
ID3 id3(mDataSource, true /* ignorev1 */, offset);
if (id3.isValid()) {
struct Map {
const char *key;
const char *tag1;
const char *tag2;
};
static const Map kMap[] = {
{ AMEDIAFORMAT_KEY_ALBUM, "TALB", "TAL" },
{ AMEDIAFORMAT_KEY_ARTIST, "TPE1", "TP1" },
{ AMEDIAFORMAT_KEY_ALBUMARTIST, "TPE2", "TP2" },
{ AMEDIAFORMAT_KEY_COMPOSER, "TCOM", "TCM" },
{ AMEDIAFORMAT_KEY_GENRE, "TCON", "TCO" },
{ AMEDIAFORMAT_KEY_TITLE, "TIT2", "TT2" },
{ AMEDIAFORMAT_KEY_YEAR, "TYE", "TYER" },
{ AMEDIAFORMAT_KEY_AUTHOR, "TXT", "TEXT" },
{ AMEDIAFORMAT_KEY_CDTRACKNUMBER, "TRK", "TRCK" },
{ AMEDIAFORMAT_KEY_DISCNUMBER, "TPA", "TPOS" },
{ AMEDIAFORMAT_KEY_COMPILATION, "TCP", "TCMP" },
};
static const size_t kNumMapEntries = sizeof(kMap) / sizeof(kMap[0]);
for (size_t i = 0; i < kNumMapEntries; ++i) {
const char *ss;
if (!AMediaFormat_getString(mFileMetaData, kMap[i].key, &ss)) {
ID3::Iterator *it = new ID3::Iterator(id3, kMap[i].tag1);
if (it->done()) {
delete it;
it = new ID3::Iterator(id3, kMap[i].tag2);
}
if (it->done()) {
delete it;
continue;
}
String8 s;
it->getString(&s);
delete it;
AMediaFormat_setString(mFileMetaData, kMap[i].key, s);
}
}
size_t dataSize;
String8 mime;
const void *data = id3.getAlbumArt(&dataSize, &mime);
if (data) {
AMediaFormat_setBuffer(mFileMetaData, AMEDIAFORMAT_KEY_ALBUMART, data, dataSize);
}
}
}
MediaTrackHelper *MPEG4Extractor::getTrack(size_t index) {
status_t err;
if ((err = readMetaData()) != OK) {
return NULL;
}
Track *track = mFirstTrack;
while (index > 0) {
if (track == NULL) {
return NULL;
}
track = track->next;
--index;
}
if (track == NULL) {
return NULL;
}
Trex *trex = NULL;
int32_t trackId;
if (AMediaFormat_getInt32(track->meta, AMEDIAFORMAT_KEY_TRACK_ID, &trackId)) {
for (size_t i = 0; i < mTrex.size(); i++) {
Trex *t = &mTrex.editItemAt(i);
if (t->track_ID == (uint32_t) trackId) {
trex = t;
break;
}
}
} else {
ALOGE("b/21657957");
return NULL;
}
ALOGV("getTrack called, pssh: %zu", mPssh.size());
const char *mime;
if (!AMediaFormat_getString(track->meta, AMEDIAFORMAT_KEY_MIME, &mime)) {
return NULL;
}
sp<ItemTable> itemTable;
if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) {
void *data;
size_t size;
if (!AMediaFormat_getBuffer(track->meta, AMEDIAFORMAT_KEY_CSD_AVC, &data, &size)) {
return NULL;
}
const uint8_t *ptr = (const uint8_t *)data;
if (size < 7 || ptr[0] != 1) { // configurationVersion == 1
return NULL;
}
} else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_HEVC)
|| !strcasecmp(mime, MEDIA_MIMETYPE_IMAGE_ANDROID_HEIC)) {
void *data;
size_t size;
if (!AMediaFormat_getBuffer(track->meta, AMEDIAFORMAT_KEY_CSD_HEVC, &data, &size)) {
return NULL;
}
const uint8_t *ptr = (const uint8_t *)data;
if (size < 22 || ptr[0] != 1) { // configurationVersion == 1
return NULL;
}
if (!strcasecmp(mime, MEDIA_MIMETYPE_IMAGE_ANDROID_HEIC)) {
itemTable = mItemTable;
}
} else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AV1)) {
void *data;
size_t size;
if (!AMediaFormat_getBuffer(track->meta, AMEDIAFORMAT_KEY_CSD_0, &data, &size)) {
return NULL;
}
const uint8_t *ptr = (const uint8_t *)data;
if (size < 5 || ptr[0] != 0x81) { // configurationVersion == 1
return NULL;
}
}
if (track->has_elst and !strncasecmp("video/", mime, 6) and track->elst_media_time > 0) {
track->elstShiftStartTicks = track->elst_media_time;
ALOGV("video track->elstShiftStartTicks :%" PRIu64, track->elstShiftStartTicks);
}
MPEG4Source *source = new MPEG4Source(
track->meta, mDataSource, track->timescale, track->sampleTable,
mSidxEntries, trex, mMoofOffset, itemTable,
track->elstShiftStartTicks);
if (source->init() != OK) {
delete source;
return NULL;
}
return source;
}
// static
status_t MPEG4Extractor::verifyTrack(Track *track) {
const char *mime;
CHECK(AMediaFormat_getString(track->meta, AMEDIAFORMAT_KEY_MIME, &mime));
void *data;
size_t size;
if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) {
if (!AMediaFormat_getBuffer(track->meta, AMEDIAFORMAT_KEY_CSD_AVC, &data, &size)) {
return ERROR_MALFORMED;
}
} else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_HEVC)) {
if (!AMediaFormat_getBuffer(track->meta, AMEDIAFORMAT_KEY_CSD_HEVC, &data, &size)) {
return ERROR_MALFORMED;
}
} else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AV1)) {
if (!AMediaFormat_getBuffer(track->meta, AMEDIAFORMAT_KEY_CSD_0, &data, &size)) {
return ERROR_MALFORMED;
}
} else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4)
|| !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG2)
|| !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) {
if (!AMediaFormat_getBuffer(track->meta, AMEDIAFORMAT_KEY_ESDS, &data, &size)) {
return ERROR_MALFORMED;
}
}
if (track->sampleTable == NULL || !track->sampleTable->isValid()) {
// Make sure we have all the metadata we need.
ALOGE("stbl atom missing/invalid.");
return ERROR_MALFORMED;
}
if (track->timescale == 0) {
ALOGE("timescale invalid.");
return ERROR_MALFORMED;
}
return OK;
}
typedef enum {
//AOT_NONE = -1,
//AOT_NULL_OBJECT = 0,
//AOT_AAC_MAIN = 1, /**< Main profile */
AOT_AAC_LC = 2, /**< Low Complexity object */
//AOT_AAC_SSR = 3,
//AOT_AAC_LTP = 4,
AOT_SBR = 5,
//AOT_AAC_SCAL = 6,
//AOT_TWIN_VQ = 7,
//AOT_CELP = 8,
//AOT_HVXC = 9,
//AOT_RSVD_10 = 10, /**< (reserved) */
//AOT_RSVD_11 = 11, /**< (reserved) */
//AOT_TTSI = 12, /**< TTSI Object */
//AOT_MAIN_SYNTH = 13, /**< Main Synthetic object */
//AOT_WAV_TAB_SYNTH = 14, /**< Wavetable Synthesis object */
//AOT_GEN_MIDI = 15, /**< General MIDI object */
//AOT_ALG_SYNTH_AUD_FX = 16, /**< Algorithmic Synthesis and Audio FX object */
AOT_ER_AAC_LC = 17, /**< Error Resilient(ER) AAC Low Complexity */
//AOT_RSVD_18 = 18, /**< (reserved) */
//AOT_ER_AAC_LTP = 19, /**< Error Resilient(ER) AAC LTP object */
AOT_ER_AAC_SCAL = 20, /**< Error Resilient(ER) AAC Scalable object */
//AOT_ER_TWIN_VQ = 21, /**< Error Resilient(ER) TwinVQ object */
AOT_ER_BSAC = 22, /**< Error Resilient(ER) BSAC object */
AOT_ER_AAC_LD = 23, /**< Error Resilient(ER) AAC LowDelay object */
//AOT_ER_CELP = 24, /**< Error Resilient(ER) CELP object */
//AOT_ER_HVXC = 25, /**< Error Resilient(ER) HVXC object */
//AOT_ER_HILN = 26, /**< Error Resilient(ER) HILN object */
//AOT_ER_PARA = 27, /**< Error Resilient(ER) Parametric object */
//AOT_RSVD_28 = 28, /**< might become SSC */
AOT_PS = 29, /**< PS, Parametric Stereo (includes SBR) */
//AOT_MPEGS = 30, /**< MPEG Surround */
AOT_ESCAPE = 31, /**< Signal AOT uses more than 5 bits */
//AOT_MP3ONMP4_L1 = 32, /**< MPEG-Layer1 in mp4 */
//AOT_MP3ONMP4_L2 = 33, /**< MPEG-Layer2 in mp4 */
//AOT_MP3ONMP4_L3 = 34, /**< MPEG-Layer3 in mp4 */
//AOT_RSVD_35 = 35, /**< might become DST */
//AOT_RSVD_36 = 36, /**< might become ALS */
//AOT_AAC_SLS = 37, /**< AAC + SLS */
//AOT_SLS = 38, /**< SLS */
//AOT_ER_AAC_ELD = 39, /**< AAC Enhanced Low Delay */
//AOT_USAC = 42, /**< USAC */
//AOT_SAOC = 43, /**< SAOC */
//AOT_LD_MPEGS = 44, /**< Low Delay MPEG Surround */
//AOT_RSVD50 = 50, /**< Interim AOT for Rsvd50 */
} AUDIO_OBJECT_TYPE;
status_t MPEG4Extractor::updateAudioTrackInfoFromESDS_MPEG4Audio(
const void *esds_data, size_t esds_size) {
ESDS esds(esds_data, esds_size);
uint8_t objectTypeIndication;
if (esds.getObjectTypeIndication(&objectTypeIndication) != OK) {
return ERROR_MALFORMED;
}
if (objectTypeIndication == 0xe1) {
// This isn't MPEG4 audio at all, it's QCELP 14k...
if (mLastTrack == NULL)
return ERROR_MALFORMED;
AMediaFormat_setString(mLastTrack->meta, AMEDIAFORMAT_KEY_MIME, MEDIA_MIMETYPE_AUDIO_QCELP);
return OK;
}
if (objectTypeIndication == 0x6B || objectTypeIndication == 0x69) {
// mp3 audio
AMediaFormat_setString(mLastTrack->meta,AMEDIAFORMAT_KEY_MIME, MEDIA_MIMETYPE_AUDIO_MPEG);
return OK;
}
if (mLastTrack != NULL) {
uint32_t maxBitrate = 0;
uint32_t avgBitrate = 0;
esds.getBitRate(&maxBitrate, &avgBitrate);
if (maxBitrate > 0 && maxBitrate < INT32_MAX) {
AMediaFormat_setInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_MAX_BIT_RATE, (int32_t)maxBitrate);
}
if (avgBitrate > 0 && avgBitrate < INT32_MAX) {
AMediaFormat_setInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_BIT_RATE, (int32_t)avgBitrate);
}
}
const uint8_t *csd;
size_t csd_size;
if (esds.getCodecSpecificInfo(
(const void **)&csd, &csd_size) != OK) {
return ERROR_MALFORMED;
}
if (kUseHexDump) {
printf("ESD of size %zu\n", csd_size);
hexdump(csd, csd_size);
}
if (csd_size == 0) {
// There's no further information, i.e. no codec specific data
// Let's assume that the information provided in the mpeg4 headers
// is accurate and hope for the best.
return OK;
}
if (csd_size < 2) {
return ERROR_MALFORMED;
}
if (objectTypeIndication == 0xdd) {
// vorbis audio
if (csd[0] != 0x02) {
return ERROR_MALFORMED;
}
// codecInfo starts with two lengths, len1 and len2, that are
// "Xiph-style-lacing encoded"..
size_t offset = 1;
size_t len1 = 0;
while (offset < csd_size && csd[offset] == 0xff) {
if (__builtin_add_overflow(len1, 0xff, &len1)) {
return ERROR_MALFORMED;
}
++offset;
}
if (offset >= csd_size) {
return ERROR_MALFORMED;
}
if (__builtin_add_overflow(len1, csd[offset], &len1)) {
return ERROR_MALFORMED;
}
++offset;
if (len1 == 0) {
return ERROR_MALFORMED;
}
size_t len2 = 0;
while (offset < csd_size && csd[offset] == 0xff) {
if (__builtin_add_overflow(len2, 0xff, &len2)) {
return ERROR_MALFORMED;
}
++offset;
}
if (offset >= csd_size) {
return ERROR_MALFORMED;
}
if (__builtin_add_overflow(len2, csd[offset], &len2)) {
return ERROR_MALFORMED;
}
++offset;
if (len2 == 0) {
return ERROR_MALFORMED;
}
if (offset >= csd_size || csd[offset] != 0x01) {
return ERROR_MALFORMED;
}
// formerly kKeyVorbisInfo
AMediaFormat_setBuffer(mLastTrack->meta,
AMEDIAFORMAT_KEY_CSD_0, &csd[offset], len1);
if (__builtin_add_overflow(offset, len1, &offset) ||
offset >= csd_size || csd[offset] != 0x03) {
return ERROR_MALFORMED;
}
if (__builtin_add_overflow(offset, len2, &offset) ||
offset >= csd_size || csd[offset] != 0x05) {
return ERROR_MALFORMED;
}
// formerly kKeyVorbisBooks
AMediaFormat_setBuffer(mLastTrack->meta,
AMEDIAFORMAT_KEY_CSD_1, &csd[offset], csd_size - offset);
AMediaFormat_setString(mLastTrack->meta,
AMEDIAFORMAT_KEY_MIME, MEDIA_MIMETYPE_AUDIO_VORBIS);
return OK;
}
static uint32_t kSamplingRate[] = {
96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050,
16000, 12000, 11025, 8000, 7350
};
ABitReader br(csd, csd_size);
uint32_t objectType = br.getBits(5);
if (objectType == 31) { // AAC-ELD => additional 6 bits
objectType = 32 + br.getBits(6);
}
if (mLastTrack == NULL)
return ERROR_MALFORMED;
//keep AOT type
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_AAC_PROFILE, objectType);
uint32_t freqIndex = br.getBits(4);
int32_t sampleRate = 0;
int32_t numChannels = 0;
if (freqIndex == 15) {
if (br.numBitsLeft() < 28) return ERROR_MALFORMED;
sampleRate = br.getBits(24);
numChannels = br.getBits(4);
} else {
if (br.numBitsLeft() < 4) return ERROR_MALFORMED;
numChannels = br.getBits(4);
if (freqIndex == 13 || freqIndex == 14) {
return ERROR_MALFORMED;
}
sampleRate = kSamplingRate[freqIndex];
}
if (objectType == AOT_SBR || objectType == AOT_PS) {//SBR specific config per 14496-3 tbl 1.13
if (br.numBitsLeft() < 4) return ERROR_MALFORMED;
uint32_t extFreqIndex = br.getBits(4);
int32_t extSampleRate __unused;
if (extFreqIndex == 15) {
if (csd_size < 8) {
return ERROR_MALFORMED;
}
if (br.numBitsLeft() < 24) return ERROR_MALFORMED;
extSampleRate = br.getBits(24);
} else {
if (extFreqIndex == 13 || extFreqIndex == 14) {
return ERROR_MALFORMED;
}
extSampleRate = kSamplingRate[extFreqIndex];
}
//TODO: save the extension sampling rate value in meta data =>
// AMediaFormat_setInt32(mLastTrack->meta, kKeyExtSampleRate, extSampleRate);
}
switch (numChannels) {
// values defined in 14496-3_2009 amendment-4 Table 1.19 - Channel Configuration
case 0:
case 1:// FC
case 2:// FL FR
case 3:// FC, FL FR
case 4:// FC, FL FR, RC
case 5:// FC, FL FR, SL SR
case 6:// FC, FL FR, SL SR, LFE
//numChannels already contains the right value
break;
case 11:// FC, FL FR, SL SR, RC, LFE
numChannels = 7;
break;
case 7: // FC, FCL FCR, FL FR, SL SR, LFE
case 12:// FC, FL FR, SL SR, RL RR, LFE
case 14:// FC, FL FR, SL SR, LFE, FHL FHR
numChannels = 8;
break;
default:
return ERROR_UNSUPPORTED;
}
{
if (objectType == AOT_SBR || objectType == AOT_PS) {
if (br.numBitsLeft() < 5) return ERROR_MALFORMED;
objectType = br.getBits(5);
if (objectType == AOT_ESCAPE) {
if (br.numBitsLeft() < 6) return ERROR_MALFORMED;
objectType = 32 + br.getBits(6);
}
}
if (objectType == AOT_AAC_LC || objectType == AOT_ER_AAC_LC ||
objectType == AOT_ER_AAC_LD || objectType == AOT_ER_AAC_SCAL ||
objectType == AOT_ER_BSAC) {
if (br.numBitsLeft() < 2) return ERROR_MALFORMED;
const int32_t frameLengthFlag __unused = br.getBits(1);
const int32_t dependsOnCoreCoder = br.getBits(1);
if (dependsOnCoreCoder ) {
if (br.numBitsLeft() < 14) return ERROR_MALFORMED;
const int32_t coreCoderDelay __unused = br.getBits(14);
}
int32_t extensionFlag = -1;
if (br.numBitsLeft() > 0) {
extensionFlag = br.getBits(1);
} else {
switch (objectType) {
// 14496-3 4.5.1.1 extensionFlag
case AOT_AAC_LC:
extensionFlag = 0;
break;
case AOT_ER_AAC_LC:
case AOT_ER_AAC_SCAL:
case AOT_ER_BSAC:
case AOT_ER_AAC_LD:
extensionFlag = 1;
break;
default:
return ERROR_MALFORMED;
break;
}
ALOGW("csd missing extension flag; assuming %d for object type %u.",
extensionFlag, objectType);
}
if (numChannels == 0) {
int32_t channelsEffectiveNum = 0;
int32_t channelsNum = 0;
if (br.numBitsLeft() < 32) {
return ERROR_MALFORMED;
}
const int32_t ElementInstanceTag __unused = br.getBits(4);
const int32_t Profile __unused = br.getBits(2);
const int32_t SamplingFrequencyIndex __unused = br.getBits(4);
const int32_t NumFrontChannelElements = br.getBits(4);
const int32_t NumSideChannelElements = br.getBits(4);
const int32_t NumBackChannelElements = br.getBits(4);
const int32_t NumLfeChannelElements = br.getBits(2);
const int32_t NumAssocDataElements __unused = br.getBits(3);
const int32_t NumValidCcElements __unused = br.getBits(4);
const int32_t MonoMixdownPresent = br.getBits(1);
if (MonoMixdownPresent != 0) {
if (br.numBitsLeft() < 4) return ERROR_MALFORMED;
const int32_t MonoMixdownElementNumber __unused = br.getBits(4);
}
if (br.numBitsLeft() < 1) return ERROR_MALFORMED;
const int32_t StereoMixdownPresent = br.getBits(1);
if (StereoMixdownPresent != 0) {
if (br.numBitsLeft() < 4) return ERROR_MALFORMED;
const int32_t StereoMixdownElementNumber __unused = br.getBits(4);
}
if (br.numBitsLeft() < 1) return ERROR_MALFORMED;
const int32_t MatrixMixdownIndexPresent = br.getBits(1);
if (MatrixMixdownIndexPresent != 0) {
if (br.numBitsLeft() < 3) return ERROR_MALFORMED;
const int32_t MatrixMixdownIndex __unused = br.getBits(2);
const int32_t PseudoSurroundEnable __unused = br.getBits(1);
}
int i;
for (i=0; i < NumFrontChannelElements; i++) {
if (br.numBitsLeft() < 5) return ERROR_MALFORMED;
const int32_t FrontElementIsCpe = br.getBits(1);
const int32_t FrontElementTagSelect __unused = br.getBits(4);
channelsNum += FrontElementIsCpe ? 2 : 1;
}
for (i=0; i < NumSideChannelElements; i++) {
if (br.numBitsLeft() < 5) return ERROR_MALFORMED;
const int32_t SideElementIsCpe = br.getBits(1);
const int32_t SideElementTagSelect __unused = br.getBits(4);
channelsNum += SideElementIsCpe ? 2 : 1;
}
for (i=0; i < NumBackChannelElements; i++) {
if (br.numBitsLeft() < 5) return ERROR_MALFORMED;
const int32_t BackElementIsCpe = br.getBits(1);
const int32_t BackElementTagSelect __unused = br.getBits(4);
channelsNum += BackElementIsCpe ? 2 : 1;
}
channelsEffectiveNum = channelsNum;
for (i=0; i < NumLfeChannelElements; i++) {
if (br.numBitsLeft() < 4) return ERROR_MALFORMED;
const int32_t LfeElementTagSelect __unused = br.getBits(4);
channelsNum += 1;
}
ALOGV("mpeg4 audio channelsNum = %d", channelsNum);
ALOGV("mpeg4 audio channelsEffectiveNum = %d", channelsEffectiveNum);
numChannels = channelsNum;
}
}
}
if (numChannels == 0) {
return ERROR_UNSUPPORTED;
}
if (mLastTrack == NULL)
return ERROR_MALFORMED;
int32_t prevSampleRate;
CHECK(AMediaFormat_getInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_SAMPLE_RATE, &prevSampleRate));
if (prevSampleRate != sampleRate) {
ALOGV("mpeg4 audio sample rate different from previous setting. "
"was: %d, now: %d", prevSampleRate, sampleRate);
}
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_SAMPLE_RATE, sampleRate);
int32_t prevChannelCount;
CHECK(AMediaFormat_getInt32(mLastTrack->meta,
AMEDIAFORMAT_KEY_CHANNEL_COUNT, &prevChannelCount));
if (prevChannelCount != numChannels) {
ALOGV("mpeg4 audio channel count different from previous setting. "
"was: %d, now: %d", prevChannelCount, numChannels);
}
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_CHANNEL_COUNT, numChannels);
return OK;
}
void MPEG4Extractor::adjustRawDefaultFrameSize() {
int32_t chanCount = 0;
int32_t bitWidth = 0;
const char *mimeStr = NULL;
if(AMediaFormat_getString(mLastTrack->meta, AMEDIAFORMAT_KEY_MIME, &mimeStr) &&
!strcasecmp(mimeStr, MEDIA_MIMETYPE_AUDIO_RAW) &&
AMediaFormat_getInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_CHANNEL_COUNT, &chanCount) &&
AMediaFormat_getInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_BITS_PER_SAMPLE, &bitWidth)) {
// samplesize in stsz may not right , so updade default samplesize
mLastTrack->sampleTable->setPredictSampleSize(chanCount * bitWidth / 8);
}
}
////////////////////////////////////////////////////////////////////////////////
MPEG4Source::MPEG4Source(
AMediaFormat *format,
DataSourceHelper *dataSource,
int32_t timeScale,
const sp<SampleTable> &sampleTable,
Vector<SidxEntry> &sidx,
const Trex *trex,
off64_t firstMoofOffset,
const sp<ItemTable> &itemTable,
uint64_t elstShiftStartTicks)
: mFormat(format),
mDataSource(dataSource),
mTimescale(timeScale),
mSampleTable(sampleTable),
mCurrentSampleIndex(0),
mCurrentFragmentIndex(0),
mSegments(sidx),
mTrex(trex),
mFirstMoofOffset(firstMoofOffset),
mCurrentMoofOffset(firstMoofOffset),
mNextMoofOffset(-1),
mCurrentTime(0),
mDefaultEncryptedByteBlock(0),
mDefaultSkipByteBlock(0),
mCurrentSampleInfoAllocSize(0),
mCurrentSampleInfoSizes(NULL),
mCurrentSampleInfoOffsetsAllocSize(0),
mCurrentSampleInfoOffsets(NULL),
mIsAVC(false),
mIsHEVC(false),
mIsAC4(false),
mIsPcm(false),
mNALLengthSize(0),
mStarted(false),
mBuffer(NULL),
mSrcBuffer(NULL),
mIsHeif(itemTable != NULL),
mItemTable(itemTable),
mElstShiftStartTicks(elstShiftStartTicks) {
memset(&mTrackFragmentHeaderInfo, 0, sizeof(mTrackFragmentHeaderInfo));
AMediaFormat_getInt32(mFormat,
AMEDIAFORMAT_KEY_CRYPTO_MODE, &mCryptoMode);
mDefaultIVSize = 0;
AMediaFormat_getInt32(mFormat,
AMEDIAFORMAT_KEY_CRYPTO_DEFAULT_IV_SIZE, &mDefaultIVSize);
void *key;
size_t keysize;
if (AMediaFormat_getBuffer(mFormat,
AMEDIAFORMAT_KEY_CRYPTO_KEY, &key, &keysize)) {
CHECK(keysize <= 16);
memset(mCryptoKey, 0, 16);
memcpy(mCryptoKey, key, keysize);
}
AMediaFormat_getInt32(mFormat,
AMEDIAFORMAT_KEY_CRYPTO_ENCRYPTED_BYTE_BLOCK, &mDefaultEncryptedByteBlock);
AMediaFormat_getInt32(mFormat,
AMEDIAFORMAT_KEY_CRYPTO_SKIP_BYTE_BLOCK, &mDefaultSkipByteBlock);
const char *mime;
bool success = AMediaFormat_getString(mFormat, AMEDIAFORMAT_KEY_MIME, &mime);
CHECK(success);
mIsAVC = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC);
mIsHEVC = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_HEVC) ||
!strcasecmp(mime, MEDIA_MIMETYPE_IMAGE_ANDROID_HEIC);
mIsAC4 = !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AC4);
if (mIsAVC) {
void *data;
size_t size;
CHECK(AMediaFormat_getBuffer(format, AMEDIAFORMAT_KEY_CSD_AVC, &data, &size));
const uint8_t *ptr = (const uint8_t *)data;
CHECK(size >= 7);
CHECK_EQ((unsigned)ptr[0], 1u); // configurationVersion == 1
// The number of bytes used to encode the length of a NAL unit.
mNALLengthSize = 1 + (ptr[4] & 3);
} else if (mIsHEVC) {
void *data;
size_t size;
CHECK(AMediaFormat_getBuffer(format, AMEDIAFORMAT_KEY_CSD_HEVC, &data, &size));
const uint8_t *ptr = (const uint8_t *)data;
CHECK(size >= 22);
CHECK_EQ((unsigned)ptr[0], 1u); // configurationVersion == 1
mNALLengthSize = 1 + (ptr[14 + 7] & 3);
}
mIsPcm = !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_RAW);
mIsAudio = !strncasecmp(mime, "audio/", 6);
if (mIsPcm) {
int32_t numChannels = 0;
int32_t bitsPerSample = 0;
CHECK(AMediaFormat_getInt32(mFormat, AMEDIAFORMAT_KEY_BITS_PER_SAMPLE, &bitsPerSample));
CHECK(AMediaFormat_getInt32(mFormat, AMEDIAFORMAT_KEY_CHANNEL_COUNT, &numChannels));
int32_t bytesPerSample = bitsPerSample >> 3;
int32_t pcmSampleSize = bytesPerSample * numChannels;
size_t maxSampleSize;
status_t err = mSampleTable->getMaxSampleSize(&maxSampleSize);
if (err != OK || maxSampleSize != static_cast<size_t>(pcmSampleSize)
|| bitsPerSample != 16) {
// Not supported
mIsPcm = false;
} else {
AMediaFormat_setInt32(mFormat,
AMEDIAFORMAT_KEY_MAX_INPUT_SIZE, pcmSampleSize * kMaxPcmFrameSize);
}
}
CHECK(AMediaFormat_getInt32(format, AMEDIAFORMAT_KEY_TRACK_ID, &mTrackId));
}
status_t MPEG4Source::init() {
status_t err = OK;
const char *mime;
CHECK(AMediaFormat_getString(mFormat, AMEDIAFORMAT_KEY_MIME, &mime));
if (mFirstMoofOffset != 0) {
off64_t offset = mFirstMoofOffset;
err = parseChunk(&offset);
if(err == OK && !strncasecmp("video/", mime, 6)
&& !mCurrentSamples.isEmpty()) {
// Start offset should be less or equal to composition time of first sample.
// ISO : sample_composition_time_offset, version 0 (unsigned) for major brands.
mElstShiftStartTicks = std::min(mElstShiftStartTicks,
(uint64_t)(*mCurrentSamples.begin()).compositionOffset);
}
return err;
}
if (!strncasecmp("video/", mime, 6)) {
uint64_t firstSampleCTS = 0;
err = mSampleTable->getMetaDataForSample(0, NULL, NULL, &firstSampleCTS);
// Start offset should be less or equal to composition time of first sample.
// Composition time stamp of first sample cannot be negative.
mElstShiftStartTicks = std::min(mElstShiftStartTicks, firstSampleCTS);
}
return err;
}
MPEG4Source::~MPEG4Source() {
if (mStarted) {
stop();
}
free(mCurrentSampleInfoSizes);
free(mCurrentSampleInfoOffsets);
}
media_status_t MPEG4Source::start() {
Mutex::Autolock autoLock(mLock);
CHECK(!mStarted);
int32_t tmp;
CHECK(AMediaFormat_getInt32(mFormat, AMEDIAFORMAT_KEY_MAX_INPUT_SIZE, &tmp));
size_t max_size = tmp;
// A somewhat arbitrary limit that should be sufficient for 8k video frames
// If you see the message below for a valid input stream: increase the limit
const size_t kMaxBufferSize = 64 * 1024 * 1024;
if (max_size > kMaxBufferSize) {
ALOGE("bogus max input size: %zu > %zu", max_size, kMaxBufferSize);
return AMEDIA_ERROR_MALFORMED;
}
if (max_size == 0) {
ALOGE("zero max input size");
return AMEDIA_ERROR_MALFORMED;
}
// Allow up to kMaxBuffers, but not if the total exceeds kMaxBufferSize.
const size_t kInitialBuffers = 2;
const size_t kMaxBuffers = 8;
const size_t realMaxBuffers = min(kMaxBufferSize / max_size, kMaxBuffers);
mBufferGroup->init(kInitialBuffers, max_size, realMaxBuffers);
mSrcBuffer = new (std::nothrow) uint8_t[max_size];
if (mSrcBuffer == NULL) {
// file probably specified a bad max size
return AMEDIA_ERROR_MALFORMED;
}
mStarted = true;
return AMEDIA_OK;
}
media_status_t MPEG4Source::stop() {
Mutex::Autolock autoLock(mLock);
CHECK(mStarted);
if (mBuffer != NULL) {
mBuffer->release();
mBuffer = NULL;
}
delete[] mSrcBuffer;
mSrcBuffer = NULL;
mStarted = false;
mCurrentSampleIndex = 0;
return AMEDIA_OK;
}
status_t MPEG4Source::parseChunk(off64_t *offset) {
uint32_t hdr[2];
if (mDataSource->readAt(*offset, hdr, 8) < 8) {
return ERROR_IO;
}
uint64_t chunk_size = ntohl(hdr[0]);
uint32_t chunk_type = ntohl(hdr[1]);
off64_t data_offset = *offset + 8;
if (chunk_size == 1) {
if (mDataSource->readAt(*offset + 8, &chunk_size, 8) < 8) {
return ERROR_IO;
}
chunk_size = ntoh64(chunk_size);
data_offset += 8;
if (chunk_size < 16) {
// The smallest valid chunk is 16 bytes long in this case.
return ERROR_MALFORMED;
}
} else if (chunk_size < 8) {
// The smallest valid chunk is 8 bytes long.
return ERROR_MALFORMED;
}
char chunk[5];
MakeFourCCString(chunk_type, chunk);
ALOGV("MPEG4Source chunk %s @ %#llx", chunk, (long long)*offset);
off64_t chunk_data_size = *offset + chunk_size - data_offset;
switch(chunk_type) {
case FOURCC("traf"):
case FOURCC("moof"): {
off64_t stop_offset = *offset + chunk_size;
*offset = data_offset;
while (*offset < stop_offset) {
status_t err = parseChunk(offset);
if (err != OK) {
return err;
}
}
if (chunk_type == FOURCC("moof")) {
// *offset points to the box following this moof. Find the next moof from there.
while (true) {
if (mDataSource->readAt(*offset, hdr, 8) < 8) {
// no more box to the end of file.
break;
}
chunk_size = ntohl(hdr[0]);
chunk_type = ntohl(hdr[1]);
if (chunk_size == 1) {
// ISO/IEC 14496-12:2012, 8.8.4 Movie Fragment Box, moof is a Box
// which is defined in 4.2 Object Structure.
// When chunk_size==1, 8 bytes follows as "largesize".
if (mDataSource->readAt(*offset + 8, &chunk_size, 8) < 8) {
return ERROR_IO;
}
chunk_size = ntoh64(chunk_size);
if (chunk_size < 16) {
// The smallest valid chunk is 16 bytes long in this case.
return ERROR_MALFORMED;
}
} else if (chunk_size == 0) {
// next box extends to end of file.
} else if (chunk_size < 8) {
// The smallest valid chunk is 8 bytes long in this case.
return ERROR_MALFORMED;
}
if (chunk_type == FOURCC("moof")) {
mNextMoofOffset = *offset;
break;
} else if (chunk_size == 0) {
break;
}
*offset += chunk_size;
}
}
break;
}
case FOURCC("tfhd"): {
status_t err;
if ((err = parseTrackFragmentHeader(data_offset, chunk_data_size)) != OK) {
return err;
}
*offset += chunk_size;
break;
}
case FOURCC("trun"): {
status_t err;
if (mLastParsedTrackId == mTrackId) {
if ((err = parseTrackFragmentRun(data_offset, chunk_data_size)) != OK) {
return err;
}
}
*offset += chunk_size;
break;
}
case FOURCC("saiz"): {
status_t err;
if ((err = parseSampleAuxiliaryInformationSizes(data_offset, chunk_data_size)) != OK) {
return err;
}
*offset += chunk_size;
break;
}
case FOURCC("saio"): {
status_t err;
if ((err = parseSampleAuxiliaryInformationOffsets(data_offset, chunk_data_size))
!= OK) {
return err;
}
*offset += chunk_size;
break;
}
case FOURCC("senc"): {
status_t err;
if ((err = parseSampleEncryption(data_offset)) != OK) {
return err;
}
*offset += chunk_size;
break;
}
case FOURCC("mdat"): {
// parse DRM info if present
ALOGV("MPEG4Source::parseChunk mdat");
// if saiz/saoi was previously observed, do something with the sampleinfos
*offset += chunk_size;
break;
}
default: {
*offset += chunk_size;
break;
}
}
return OK;
}
status_t MPEG4Source::parseSampleAuxiliaryInformationSizes(
off64_t offset, off64_t /* size */) {
ALOGV("parseSampleAuxiliaryInformationSizes");
// 14496-12 8.7.12
uint8_t version;
if (mDataSource->readAt(
offset, &version, sizeof(version))
< (ssize_t)sizeof(version)) {
return ERROR_IO;
}
if (version != 0) {
return ERROR_UNSUPPORTED;
}
offset++;
uint32_t flags;
if (!mDataSource->getUInt24(offset, &flags)) {
return ERROR_IO;
}
offset += 3;
if (flags & 1) {
uint32_t tmp;
if (!mDataSource->getUInt32(offset, &tmp)) {
return ERROR_MALFORMED;
}
mCurrentAuxInfoType = tmp;
offset += 4;
if (!mDataSource->getUInt32(offset, &tmp)) {
return ERROR_MALFORMED;
}
mCurrentAuxInfoTypeParameter = tmp;
offset += 4;
}
uint8_t defsize;
if (mDataSource->readAt(offset, &defsize, 1) != 1) {
return ERROR_MALFORMED;
}
mCurrentDefaultSampleInfoSize = defsize;
offset++;
uint32_t smplcnt;
if (!mDataSource->getUInt32(offset, &smplcnt)) {
return ERROR_MALFORMED;
}
mCurrentSampleInfoCount = smplcnt;
offset += 4;
if (mCurrentDefaultSampleInfoSize != 0) {
ALOGV("@@@@ using default sample info size of %d", mCurrentDefaultSampleInfoSize);
return OK;
}
if (smplcnt > mCurrentSampleInfoAllocSize) {
uint8_t * newPtr = (uint8_t*) realloc(mCurrentSampleInfoSizes, smplcnt);
if (newPtr == NULL) {
ALOGE("failed to realloc %u -> %u", mCurrentSampleInfoAllocSize, smplcnt);
return NO_MEMORY;
}
mCurrentSampleInfoSizes = newPtr;
mCurrentSampleInfoAllocSize = smplcnt;
}
mDataSource->readAt(offset, mCurrentSampleInfoSizes, smplcnt);
return OK;
}
status_t MPEG4Source::parseSampleAuxiliaryInformationOffsets(
off64_t offset, off64_t /* size */) {
ALOGV("parseSampleAuxiliaryInformationOffsets");
// 14496-12 8.7.13
uint8_t version;
if (mDataSource->readAt(offset, &version, sizeof(version)) != 1) {
return ERROR_IO;
}
offset++;
uint32_t flags;
if (!mDataSource->getUInt24(offset, &flags)) {
return ERROR_IO;
}
offset += 3;
uint32_t entrycount;
if (!mDataSource->getUInt32(offset, &entrycount)) {
return ERROR_IO;
}
offset += 4;
if (entrycount == 0) {
return OK;
}
if (entrycount > UINT32_MAX / 8) {
return ERROR_MALFORMED;
}
if (entrycount > mCurrentSampleInfoOffsetsAllocSize) {
uint64_t *newPtr = (uint64_t *)realloc(mCurrentSampleInfoOffsets, entrycount * 8);
if (newPtr == NULL) {
ALOGE("failed to realloc %u -> %u",
mCurrentSampleInfoOffsetsAllocSize, entrycount * 8);
return NO_MEMORY;
}
mCurrentSampleInfoOffsets = newPtr;
mCurrentSampleInfoOffsetsAllocSize = entrycount;
}
mCurrentSampleInfoOffsetCount = entrycount;
if (mCurrentSampleInfoOffsets == NULL) {
return OK;
}
for (size_t i = 0; i < entrycount; i++) {
if (version == 0) {
uint32_t tmp;
if (!mDataSource->getUInt32(offset, &tmp)) {
return ERROR_IO;
}
mCurrentSampleInfoOffsets[i] = tmp;
offset += 4;
} else {
uint64_t tmp;
if (!mDataSource->getUInt64(offset, &tmp)) {
return ERROR_IO;
}
mCurrentSampleInfoOffsets[i] = tmp;
offset += 8;
}
}
// parse clear/encrypted data
off64_t drmoffset = mCurrentSampleInfoOffsets[0]; // from moof
drmoffset += mCurrentMoofOffset;
return parseClearEncryptedSizes(drmoffset, false, 0);
}
status_t MPEG4Source::parseClearEncryptedSizes(
off64_t offset, bool isSubsampleEncryption, uint32_t flags) {
int32_t ivlength;
if (!AMediaFormat_getInt32(mFormat, AMEDIAFORMAT_KEY_CRYPTO_DEFAULT_IV_SIZE, &ivlength)) {
return ERROR_MALFORMED;
}
// only 0, 8 and 16 byte initialization vectors are supported
if (ivlength != 0 && ivlength != 8 && ivlength != 16) {
ALOGW("unsupported IV length: %d", ivlength);
return ERROR_MALFORMED;
}
uint32_t sampleCount = mCurrentSampleInfoCount;
if (isSubsampleEncryption) {
if (!mDataSource->getUInt32(offset, &sampleCount)) {
return ERROR_IO;
}
offset += 4;
}
// read CencSampleAuxiliaryDataFormats
for (size_t i = 0; i < sampleCount; i++) {
if (i >= mCurrentSamples.size()) {
ALOGW("too few samples");
break;
}
Sample *smpl = &mCurrentSamples.editItemAt(i);
if (!smpl->clearsizes.isEmpty()) {
continue;
}
memset(smpl->iv, 0, 16);
if (mDataSource->readAt(offset, smpl->iv, ivlength) != ivlength) {
return ERROR_IO;
}
offset += ivlength;
bool readSubsamples;
if (isSubsampleEncryption) {
readSubsamples = flags & 2;
} else {
int32_t smplinfosize = mCurrentDefaultSampleInfoSize;
if (smplinfosize == 0) {
smplinfosize = mCurrentSampleInfoSizes[i];
}
readSubsamples = smplinfosize > ivlength;
}
if (readSubsamples) {
uint16_t numsubsamples;
if (!mDataSource->getUInt16(offset, &numsubsamples)) {
return ERROR_IO;
}
offset += 2;
for (size_t j = 0; j < numsubsamples; j++) {
uint16_t numclear;
uint32_t numencrypted;
if (!mDataSource->getUInt16(offset, &numclear)) {
return ERROR_IO;
}
offset += 2;
if (!mDataSource->getUInt32(offset, &numencrypted)) {
return ERROR_IO;
}
offset += 4;
smpl->clearsizes.add(numclear);
smpl->encryptedsizes.add(numencrypted);
}
} else {
smpl->clearsizes.add(0);
smpl->encryptedsizes.add(smpl->size);
}
}
return OK;
}
status_t MPEG4Source::parseSampleEncryption(off64_t offset) {
uint32_t flags;
if (!mDataSource->getUInt32(offset, &flags)) { // actually version + flags
return ERROR_MALFORMED;
}
return parseClearEncryptedSizes(offset + 4, true, flags);
}
status_t MPEG4Source::parseTrackFragmentHeader(off64_t offset, off64_t size) {
if (size < 8) {
return -EINVAL;
}
uint32_t flags;
if (!mDataSource->getUInt32(offset, &flags)) { // actually version + flags
return ERROR_MALFORMED;
}
if (flags & 0xff000000) {
return -EINVAL;
}
if (!mDataSource->getUInt32(offset + 4, (uint32_t*)&mLastParsedTrackId)) {
return ERROR_MALFORMED;
}
if (mLastParsedTrackId != mTrackId) {
// this is not the right track, skip it
return OK;
}
mTrackFragmentHeaderInfo.mFlags = flags;
mTrackFragmentHeaderInfo.mTrackID = mLastParsedTrackId;
offset += 8;
size -= 8;
ALOGV("fragment header: %08x %08x", flags, mTrackFragmentHeaderInfo.mTrackID);
if (flags & TrackFragmentHeaderInfo::kBaseDataOffsetPresent) {
if (size < 8) {
return -EINVAL;
}
if (!mDataSource->getUInt64(offset, &mTrackFragmentHeaderInfo.mBaseDataOffset)) {
return ERROR_MALFORMED;
}
offset += 8;
size -= 8;
}
if (flags & TrackFragmentHeaderInfo::kSampleDescriptionIndexPresent) {
if (size < 4) {
return -EINVAL;
}
if (!mDataSource->getUInt32(offset, &mTrackFragmentHeaderInfo.mSampleDescriptionIndex)) {
return ERROR_MALFORMED;
}
offset += 4;
size -= 4;
}
if (flags & TrackFragmentHeaderInfo::kDefaultSampleDurationPresent) {
if (size < 4) {
return -EINVAL;
}
if (!mDataSource->getUInt32(offset, &mTrackFragmentHeaderInfo.mDefaultSampleDuration)) {
return ERROR_MALFORMED;
}
offset += 4;
size -= 4;
}
if (flags & TrackFragmentHeaderInfo::kDefaultSampleSizePresent) {
if (size < 4) {
return -EINVAL;
}
if (!mDataSource->getUInt32(offset, &mTrackFragmentHeaderInfo.mDefaultSampleSize)) {
return ERROR_MALFORMED;
}
offset += 4;
size -= 4;
}
if (flags & TrackFragmentHeaderInfo::kDefaultSampleFlagsPresent) {
if (size < 4) {
return -EINVAL;
}
if (!mDataSource->getUInt32(offset, &mTrackFragmentHeaderInfo.mDefaultSampleFlags)) {
return ERROR_MALFORMED;
}
offset += 4;
size -= 4;
}
if (!(flags & TrackFragmentHeaderInfo::kBaseDataOffsetPresent)) {
mTrackFragmentHeaderInfo.mBaseDataOffset = mCurrentMoofOffset;
}
mTrackFragmentHeaderInfo.mDataOffset = 0;
return OK;
}
status_t MPEG4Source::parseTrackFragmentRun(off64_t offset, off64_t size) {
ALOGV("MPEG4Source::parseTrackFragmentRun");
if (size < 8) {
return -EINVAL;
}
enum {
kDataOffsetPresent = 0x01,
kFirstSampleFlagsPresent = 0x04,
kSampleDurationPresent = 0x100,
kSampleSizePresent = 0x200,
kSampleFlagsPresent = 0x400,
kSampleCompositionTimeOffsetPresent = 0x800,
};
uint32_t flags;
if (!mDataSource->getUInt32(offset, &flags)) {
return ERROR_MALFORMED;
}
// |version| only affects SampleCompositionTimeOffset field.
// If version == 0, SampleCompositionTimeOffset is uint32_t;
// Otherwise, SampleCompositionTimeOffset is int32_t.
// Sample.compositionOffset is defined as int32_t.
uint8_t version = flags >> 24;
flags &= 0xffffff;
ALOGV("fragment run version: 0x%02x, flags: 0x%06x", version, flags);
if ((flags & kFirstSampleFlagsPresent) && (flags & kSampleFlagsPresent)) {
// These two shall not be used together.
return -EINVAL;
}
uint32_t sampleCount;
if (!mDataSource->getUInt32(offset + 4, &sampleCount)) {
return ERROR_MALFORMED;
}
offset += 8;
size -= 8;
uint64_t dataOffset = mTrackFragmentHeaderInfo.mDataOffset;
uint32_t firstSampleFlags = 0;
if (flags & kDataOffsetPresent) {
if (size < 4) {
return -EINVAL;
}
int32_t dataOffsetDelta;
if (!mDataSource->getUInt32(offset, (uint32_t*)&dataOffsetDelta)) {
return ERROR_MALFORMED;
}
dataOffset = mTrackFragmentHeaderInfo.mBaseDataOffset + dataOffsetDelta;
offset += 4;
size -= 4;
}
if (flags & kFirstSampleFlagsPresent) {
if (size < 4) {
return -EINVAL;
}
if (!mDataSource->getUInt32(offset, &firstSampleFlags)) {
return ERROR_MALFORMED;
}
offset += 4;
size -= 4;
}
uint32_t sampleDuration = 0, sampleSize = 0, sampleFlags = 0,
sampleCtsOffset = 0;
size_t bytesPerSample = 0;
if (flags & kSampleDurationPresent) {
bytesPerSample += 4;
} else if (mTrackFragmentHeaderInfo.mFlags
& TrackFragmentHeaderInfo::kDefaultSampleDurationPresent) {
sampleDuration = mTrackFragmentHeaderInfo.mDefaultSampleDuration;
} else if (mTrex) {
sampleDuration = mTrex->default_sample_duration;
}
if (flags & kSampleSizePresent) {
bytesPerSample += 4;
} else if (mTrackFragmentHeaderInfo.mFlags
& TrackFragmentHeaderInfo::kDefaultSampleSizePresent) {
sampleSize = mTrackFragmentHeaderInfo.mDefaultSampleSize;
} else {
sampleSize = mTrackFragmentHeaderInfo.mDefaultSampleSize;
}
if (flags & kSampleFlagsPresent) {
bytesPerSample += 4;
} else if (mTrackFragmentHeaderInfo.mFlags
& TrackFragmentHeaderInfo::kDefaultSampleFlagsPresent) {
sampleFlags = mTrackFragmentHeaderInfo.mDefaultSampleFlags;
} else {
sampleFlags = mTrackFragmentHeaderInfo.mDefaultSampleFlags;
}
if (flags & kSampleCompositionTimeOffsetPresent) {
bytesPerSample += 4;
} else {
sampleCtsOffset = 0;
}
if (bytesPerSample != 0) {
if (size < (off64_t)sampleCount * bytesPerSample) {
return -EINVAL;
}
} else {
if (sampleDuration == 0) {
ALOGW("b/123389881 sampleDuration == 0");
android_errorWriteLog(0x534e4554, "124389881 zero");
return -EINVAL;
}
// apply some sanity (vs strict legality) checks
//
// clamp the count of entries in the trun box, to avoid spending forever parsing
// this box. Clamping (vs error) lets us play *something*.
// 1 million is about 400 msecs on a Pixel3, should be no more than a couple seconds
// on the slowest devices.
static constexpr uint32_t kMaxTrunSampleCount = 1000000;
if (sampleCount > kMaxTrunSampleCount) {
ALOGW("b/123389881 clamp sampleCount(%u) @ kMaxTrunSampleCount(%u)",
sampleCount, kMaxTrunSampleCount);
android_errorWriteLog(0x534e4554, "124389881 count");
}
}
Sample tmp;
for (uint32_t i = 0; i < sampleCount; ++i) {
if (flags & kSampleDurationPresent) {
if (!mDataSource->getUInt32(offset, &sampleDuration)) {
return ERROR_MALFORMED;
}
offset += 4;
}
if (flags & kSampleSizePresent) {
if (!mDataSource->getUInt32(offset, &sampleSize)) {
return ERROR_MALFORMED;
}
offset += 4;
}
if (flags & kSampleFlagsPresent) {
if (!mDataSource->getUInt32(offset, &sampleFlags)) {
return ERROR_MALFORMED;
}
offset += 4;
}
if (flags & kSampleCompositionTimeOffsetPresent) {
if (!mDataSource->getUInt32(offset, &sampleCtsOffset)) {
return ERROR_MALFORMED;
}
offset += 4;
}
ALOGV("adding sample %d at offset 0x%08" PRIx64 ", size %u, duration %u, "
" flags 0x%08x ctsOffset %" PRIu32, i + 1,
dataOffset, sampleSize, sampleDuration,
(flags & kFirstSampleFlagsPresent) && i == 0
? firstSampleFlags : sampleFlags, sampleCtsOffset);
tmp.offset = dataOffset;
tmp.size = sampleSize;
tmp.duration = sampleDuration;
tmp.compositionOffset = sampleCtsOffset;
memset(tmp.iv, 0, sizeof(tmp.iv));
mCurrentSamples.add(tmp);
dataOffset += sampleSize;
}
mTrackFragmentHeaderInfo.mDataOffset = dataOffset;
return OK;
}
media_status_t MPEG4Source::getFormat(AMediaFormat *meta) {
Mutex::Autolock autoLock(mLock);
AMediaFormat_copy(meta, mFormat);
return AMEDIA_OK;
}
size_t MPEG4Source::parseNALSize(const uint8_t *data) const {
switch (mNALLengthSize) {
case 1:
return *data;
case 2:
return U16_AT(data);
case 3:
return ((size_t)data[0] << 16) | U16_AT(&data[1]);
case 4:
return U32_AT(data);
}
// This cannot happen, mNALLengthSize springs to life by adding 1 to
// a 2-bit integer.
CHECK(!"Should not be here.");
return 0;
}
int32_t MPEG4Source::parseHEVCLayerId(const uint8_t *data, size_t size) {
if (data == nullptr || size < mNALLengthSize + 2) {
return -1;
}
// HEVC NAL-header (16-bit)
// 1 6 6 3
// |-|uuuuuu|------|iii|
// ^ ^
// NAL_type layer_id + 1
//
// Layer-id is non-zero only for Temporal Sub-layer Access pictures (TSA)
enum {
TSA_N = 2,
TSA_R = 3,
STSA_N = 4,
STSA_R = 5,
};
data += mNALLengthSize;
uint16_t nalHeader = data[0] << 8 | data[1];
uint16_t nalType = (nalHeader >> 9) & 0x3Fu;
if (nalType == TSA_N || nalType == TSA_R || nalType == STSA_N || nalType == STSA_R) {
int32_t layerIdPlusOne = nalHeader & 0x7u;
ALOGD_IF(layerIdPlusOne == 0, "got layerId 0 for TSA picture");
return layerIdPlusOne - 1;
}
return 0;
}
media_status_t MPEG4Source::read(
MediaBufferHelper **out, const ReadOptions *options) {
Mutex::Autolock autoLock(mLock);
CHECK(mStarted);
if (options != nullptr && options->getNonBlocking() && !mBufferGroup->has_buffers()) {
*out = nullptr;
return AMEDIA_ERROR_WOULD_BLOCK;
}
if (mFirstMoofOffset > 0) {
return fragmentedRead(out, options);
}
*out = NULL;
int64_t targetSampleTimeUs = -1;
int64_t seekTimeUs;
ReadOptions::SeekMode mode;
if (options && options->getSeekTo(&seekTimeUs, &mode)) {
if (mIsHeif) {
CHECK(mSampleTable == NULL);
CHECK(mItemTable != NULL);
int32_t imageIndex;
if (!AMediaFormat_getInt32(mFormat, AMEDIAFORMAT_KEY_TRACK_ID, &imageIndex)) {
return AMEDIA_ERROR_MALFORMED;
}
status_t err;
if (seekTimeUs >= 0) {
err = mItemTable->findImageItem(imageIndex, &mCurrentSampleIndex);
} else {
err = mItemTable->findThumbnailItem(imageIndex, &mCurrentSampleIndex);
}
if (err != OK) {
return AMEDIA_ERROR_UNKNOWN;
}
} else {
uint32_t findFlags = 0;
switch (mode) {
case ReadOptions::SEEK_PREVIOUS_SYNC:
findFlags = SampleTable::kFlagBefore;
break;
case ReadOptions::SEEK_NEXT_SYNC:
findFlags = SampleTable::kFlagAfter;
break;
case ReadOptions::SEEK_CLOSEST_SYNC:
case ReadOptions::SEEK_CLOSEST:
findFlags = SampleTable::kFlagClosest;
break;
case ReadOptions::SEEK_FRAME_INDEX:
findFlags = SampleTable::kFlagFrameIndex;
break;
default:
CHECK(!"Should not be here.");
break;
}
if( mode != ReadOptions::SEEK_FRAME_INDEX) {
seekTimeUs += ((long double)mElstShiftStartTicks * 1000000) / mTimescale;
}
uint32_t sampleIndex;
status_t err = mSampleTable->findSampleAtTime(
seekTimeUs, 1000000, mTimescale,
&sampleIndex, findFlags);
if (mode == ReadOptions::SEEK_CLOSEST
|| mode == ReadOptions::SEEK_FRAME_INDEX) {
// We found the closest sample already, now we want the sync
// sample preceding it (or the sample itself of course), even
// if the subsequent sync sample is closer.
findFlags = SampleTable::kFlagBefore;
}
uint32_t syncSampleIndex = sampleIndex;
// assume every audio sample is a sync sample. This works around
// seek issues with files that were incorrectly written with an
// empty or single-sample stss block for the audio track
if (err == OK && !mIsAudio) {
err = mSampleTable->findSyncSampleNear(
sampleIndex, &syncSampleIndex, findFlags);
}
uint64_t sampleTime;
if (err == OK) {
err = mSampleTable->getMetaDataForSample(
sampleIndex, NULL, NULL, &sampleTime);
}
if (err != OK) {
if (err == ERROR_OUT_OF_RANGE) {
// An attempt to seek past the end of the stream would
// normally cause this ERROR_OUT_OF_RANGE error. Propagating
// this all the way to the MediaPlayer would cause abnormal
// termination. Legacy behaviour appears to be to behave as if
// we had seeked to the end of stream, ending normally.
return AMEDIA_ERROR_END_OF_STREAM;
}
ALOGV("end of stream");
return AMEDIA_ERROR_UNKNOWN;
}
if (mode == ReadOptions::SEEK_CLOSEST
|| mode == ReadOptions::SEEK_FRAME_INDEX) {
sampleTime -= mElstShiftStartTicks;
targetSampleTimeUs = (sampleTime * 1000000ll) / mTimescale;
}
#if 0
uint32_t syncSampleTime;
CHECK_EQ(OK, mSampleTable->getMetaDataForSample(
syncSampleIndex, NULL, NULL, &syncSampleTime));
ALOGI("seek to time %lld us => sample at time %lld us, "
"sync sample at time %lld us",
seekTimeUs,
sampleTime * 1000000ll / mTimescale,
syncSampleTime * 1000000ll / mTimescale);
#endif
mCurrentSampleIndex = syncSampleIndex;
}
if (mBuffer != NULL) {
mBuffer->release();
mBuffer = NULL;
}
// fall through
}
off64_t offset = 0;
size_t size = 0;
uint64_t cts, stts;
bool isSyncSample;
bool newBuffer = false;
if (mBuffer == NULL) {
newBuffer = true;
status_t err;
if (!mIsHeif) {
err = mSampleTable->getMetaDataForSample(
mCurrentSampleIndex, &offset, &size, &cts, &isSyncSample, &stts);
if(err == OK) {
/* Composition Time Stamp cannot be negative. Some files have video Sample
* Time(STTS)delta with zero value(b/117402420). Hence subtract only
* min(cts, mElstShiftStartTicks), so that audio tracks can be played.
*/
cts -= std::min(cts, mElstShiftStartTicks);
}
} else {
err = mItemTable->getImageOffsetAndSize(
options && options->getSeekTo(&seekTimeUs, &mode) ?
&mCurrentSampleIndex : NULL, &offset, &size);
cts = stts = 0;
isSyncSample = 0;
ALOGV("image offset %lld, size %zu", (long long)offset, size);
}
if (err != OK) {
if (err == ERROR_END_OF_STREAM) {
return AMEDIA_ERROR_END_OF_STREAM;
}
return AMEDIA_ERROR_UNKNOWN;
}
err = mBufferGroup->acquire_buffer(&mBuffer);
if (err != OK) {
CHECK(mBuffer == NULL);
return AMEDIA_ERROR_UNKNOWN;
}
if (size > mBuffer->size()) {
ALOGE("buffer too small: %zu > %zu", size, mBuffer->size());
mBuffer->release();
mBuffer = NULL;
return AMEDIA_ERROR_UNKNOWN; // ERROR_BUFFER_TOO_SMALL
}
}
if (!mIsAVC && !mIsHEVC && !mIsAC4) {
if (newBuffer) {
if (mIsPcm) {
// The twos' PCM block reader assumes that all samples has the same size.
uint32_t samplesToRead = mSampleTable->getLastSampleIndexInChunk()
- mCurrentSampleIndex + 1;
if (samplesToRead > kMaxPcmFrameSize) {
samplesToRead = kMaxPcmFrameSize;
}
ALOGV("Reading %d PCM frames of size %zu at index %d to stop of chunk at %d",
samplesToRead, size, mCurrentSampleIndex,
mSampleTable->getLastSampleIndexInChunk());
size_t totalSize = samplesToRead * size;
uint8_t* buf = (uint8_t *)mBuffer->data();
ssize_t bytesRead = mDataSource->readAt(offset, buf, totalSize);
if (bytesRead < (ssize_t)totalSize) {
mBuffer->release();
mBuffer = NULL;
return AMEDIA_ERROR_IO;
}
AMediaFormat *meta = mBuffer->meta_data();
AMediaFormat_clear(meta);
AMediaFormat_setInt64(
meta, AMEDIAFORMAT_KEY_TIME_US, ((long double)cts * 1000000) / mTimescale);
AMediaFormat_setInt32(meta, AMEDIAFORMAT_KEY_IS_SYNC_FRAME, 1);
int32_t byteOrder;
AMediaFormat_getInt32(mFormat,
AMEDIAFORMAT_KEY_PCM_BIG_ENDIAN, &byteOrder);
if (byteOrder == 1) {
// Big-endian -> little-endian
uint16_t *dstData = (uint16_t *)buf;
uint16_t *srcData = (uint16_t *)buf;
for (size_t j = 0; j < bytesRead / sizeof(uint16_t); j++) {
dstData[j] = ntohs(srcData[j]);
}
}
mCurrentSampleIndex += samplesToRead;
mBuffer->set_range(0, totalSize);
} else {
ssize_t num_bytes_read =
mDataSource->readAt(offset, (uint8_t *)mBuffer->data(), size);
if (num_bytes_read < (ssize_t)size) {
mBuffer->release();
mBuffer = NULL;
return AMEDIA_ERROR_IO;
}
CHECK(mBuffer != NULL);
mBuffer->set_range(0, size);
AMediaFormat *meta = mBuffer->meta_data();
AMediaFormat_clear(meta);
AMediaFormat_setInt64(
meta, AMEDIAFORMAT_KEY_TIME_US, ((long double)cts * 1000000) / mTimescale);
AMediaFormat_setInt64(
meta, AMEDIAFORMAT_KEY_DURATION, ((long double)stts * 1000000) / mTimescale);
if (targetSampleTimeUs >= 0) {
AMediaFormat_setInt64(
meta, AMEDIAFORMAT_KEY_TARGET_TIME, targetSampleTimeUs);
}
if (isSyncSample) {
AMediaFormat_setInt32(meta, AMEDIAFORMAT_KEY_IS_SYNC_FRAME, 1);
}
++mCurrentSampleIndex;
}
}
*out = mBuffer;
mBuffer = NULL;
return AMEDIA_OK;
} else if (mIsAC4) {
CHECK(mBuffer != NULL);
// Make sure there is enough space to write the sync header and the raw frame
if (mBuffer->range_length() < (7 + size)) {
mBuffer->release();
mBuffer = NULL;
return AMEDIA_ERROR_IO;
}
uint8_t *dstData = (uint8_t *)mBuffer->data();
size_t dstOffset = 0;
// Add AC-4 sync header to MPEG4 encapsulated AC-4 raw frame
// AC40 sync word, meaning no CRC at the end of the frame
dstData[dstOffset++] = 0xAC;
dstData[dstOffset++] = 0x40;
dstData[dstOffset++] = 0xFF;
dstData[dstOffset++] = 0xFF;
dstData[dstOffset++] = (uint8_t)((size >> 16) & 0xFF);
dstData[dstOffset++] = (uint8_t)((size >> 8) & 0xFF);
dstData[dstOffset++] = (uint8_t)((size >> 0) & 0xFF);
ssize_t numBytesRead = mDataSource->readAt(offset, dstData + dstOffset, size);
if (numBytesRead != (ssize_t)size) {
mBuffer->release();
mBuffer = NULL;
return AMEDIA_ERROR_IO;
}
mBuffer->set_range(0, dstOffset + size);
AMediaFormat *meta = mBuffer->meta_data();
AMediaFormat_clear(meta);
AMediaFormat_setInt64(
meta, AMEDIAFORMAT_KEY_TIME_US, ((long double)cts * 1000000) / mTimescale);
AMediaFormat_setInt64(
meta, AMEDIAFORMAT_KEY_DURATION, ((long double)stts * 1000000) / mTimescale);
if (targetSampleTimeUs >= 0) {
AMediaFormat_setInt64(
meta, AMEDIAFORMAT_KEY_TARGET_TIME, targetSampleTimeUs);
}
if (isSyncSample) {
AMediaFormat_setInt32(meta, AMEDIAFORMAT_KEY_IS_SYNC_FRAME, 1);
}
++mCurrentSampleIndex;
*out = mBuffer;
mBuffer = NULL;
return AMEDIA_OK;
} else {
// Whole NAL units are returned but each fragment is prefixed by
// the start code (0x00 00 00 01).
ssize_t num_bytes_read = 0;
num_bytes_read = mDataSource->readAt(offset, mSrcBuffer, size);
if (num_bytes_read < (ssize_t)size) {
mBuffer->release();
mBuffer = NULL;
return AMEDIA_ERROR_IO;
}
uint8_t *dstData = (uint8_t *)mBuffer->data();
size_t srcOffset = 0;
size_t dstOffset = 0;
while (srcOffset < size) {
bool isMalFormed = !isInRange((size_t)0u, size, srcOffset, mNALLengthSize);
size_t nalLength = 0;
if (!isMalFormed) {
nalLength = parseNALSize(&mSrcBuffer[srcOffset]);
srcOffset += mNALLengthSize;
isMalFormed = !isInRange((size_t)0u, size, srcOffset, nalLength);
}
if (isMalFormed) {
//if nallength abnormal,ignore it.
ALOGW("abnormal nallength, ignore this NAL");
srcOffset = size;
break;
}
if (nalLength == 0) {
continue;
}
if (dstOffset > SIZE_MAX - 4 ||
dstOffset + 4 > SIZE_MAX - nalLength ||
dstOffset + 4 + nalLength > mBuffer->size()) {
ALOGE("b/27208621 : %zu %zu", dstOffset, mBuffer->size());
android_errorWriteLog(0x534e4554, "27208621");
mBuffer->release();
mBuffer = NULL;
return AMEDIA_ERROR_MALFORMED;
}
dstData[dstOffset++] = 0;
dstData[dstOffset++] = 0;
dstData[dstOffset++] = 0;
dstData[dstOffset++] = 1;
memcpy(&dstData[dstOffset], &mSrcBuffer[srcOffset], nalLength);
srcOffset += nalLength;
dstOffset += nalLength;
}
CHECK_EQ(srcOffset, size);
CHECK(mBuffer != NULL);
mBuffer->set_range(0, dstOffset);
AMediaFormat *meta = mBuffer->meta_data();
AMediaFormat_clear(meta);
AMediaFormat_setInt64(
meta, AMEDIAFORMAT_KEY_TIME_US, ((long double)cts * 1000000) / mTimescale);
AMediaFormat_setInt64(
meta, AMEDIAFORMAT_KEY_DURATION, ((long double)stts * 1000000) / mTimescale);
if (targetSampleTimeUs >= 0) {
AMediaFormat_setInt64(
meta, AMEDIAFORMAT_KEY_TARGET_TIME, targetSampleTimeUs);
}
if (mIsAVC) {
uint32_t layerId = FindAVCLayerId(
(const uint8_t *)mBuffer->data(), mBuffer->range_length());
AMediaFormat_setInt32(meta, AMEDIAFORMAT_KEY_TEMPORAL_LAYER_ID, layerId);
} else if (mIsHEVC) {
int32_t layerId = parseHEVCLayerId(
(const uint8_t *)mBuffer->data(), mBuffer->range_length());
if (layerId >= 0) {
AMediaFormat_setInt32(meta, AMEDIAFORMAT_KEY_TEMPORAL_LAYER_ID, layerId);
}
}
if (isSyncSample) {
AMediaFormat_setInt32(meta, AMEDIAFORMAT_KEY_IS_SYNC_FRAME, 1);
}
++mCurrentSampleIndex;
*out = mBuffer;
mBuffer = NULL;
return AMEDIA_OK;
}
}
media_status_t MPEG4Source::fragmentedRead(
MediaBufferHelper **out, const ReadOptions *options) {
ALOGV("MPEG4Source::fragmentedRead");
CHECK(mStarted);
*out = NULL;
int64_t targetSampleTimeUs = -1;
int64_t seekTimeUs;
ReadOptions::SeekMode mode;
if (options && options->getSeekTo(&seekTimeUs, &mode)) {
seekTimeUs += ((long double)mElstShiftStartTicks * 1000000) / mTimescale;
ALOGV("shifted seekTimeUs :%" PRId64 ", mElstShiftStartTicks:%" PRIu64, seekTimeUs,
mElstShiftStartTicks);
int numSidxEntries = mSegments.size();
if (numSidxEntries != 0) {
int64_t totalTime = 0;
off64_t totalOffset = mFirstMoofOffset;
for (int i = 0; i < numSidxEntries; i++) {
const SidxEntry *se = &mSegments[i];
if (totalTime + se->mDurationUs > seekTimeUs) {
// The requested time is somewhere in this segment
if ((mode == ReadOptions::SEEK_NEXT_SYNC && seekTimeUs > totalTime) ||
(mode == ReadOptions::SEEK_CLOSEST_SYNC &&
(seekTimeUs - totalTime) > (totalTime + se->mDurationUs - seekTimeUs))) {
// requested next sync, or closest sync and it was closer to the end of
// this segment
totalTime += se->mDurationUs;
totalOffset += se->mSize;
}
break;
}
totalTime += se->mDurationUs;
totalOffset += se->mSize;
}
mCurrentMoofOffset = totalOffset;
mNextMoofOffset = -1;
mCurrentSamples.clear();
mCurrentSampleIndex = 0;
status_t err = parseChunk(&totalOffset);
if (err != OK) {
return AMEDIA_ERROR_UNKNOWN;
}
mCurrentTime = totalTime * mTimescale / 1000000ll;
} else {
// without sidx boxes, we can only seek to 0
mCurrentMoofOffset = mFirstMoofOffset;
mNextMoofOffset = -1;
mCurrentSamples.clear();
mCurrentSampleIndex = 0;
off64_t tmp = mCurrentMoofOffset;
status_t err = parseChunk(&tmp);
if (err != OK) {
return AMEDIA_ERROR_UNKNOWN;
}
mCurrentTime = 0;
}
if (mBuffer != NULL) {
mBuffer->release();
mBuffer = NULL;
}
// fall through
}
off64_t offset = 0;
size_t size = 0;
uint64_t cts = 0;
bool isSyncSample = false;
bool newBuffer = false;
if (mBuffer == NULL || mCurrentSampleIndex >= mCurrentSamples.size()) {
newBuffer = true;
if (mBuffer != NULL) {
mBuffer->release();
mBuffer = NULL;
}
if (mCurrentSampleIndex >= mCurrentSamples.size()) {
// move to next fragment if there is one
if (mNextMoofOffset <= mCurrentMoofOffset) {
return AMEDIA_ERROR_END_OF_STREAM;
}
off64_t nextMoof = mNextMoofOffset;
mCurrentMoofOffset = nextMoof;
mCurrentSamples.clear();
mCurrentSampleIndex = 0;
status_t err = parseChunk(&nextMoof);
if (err != OK) {
return AMEDIA_ERROR_UNKNOWN;
}
if (mCurrentSampleIndex >= mCurrentSamples.size()) {
return AMEDIA_ERROR_END_OF_STREAM;
}
}
const Sample *smpl = &mCurrentSamples[mCurrentSampleIndex];
offset = smpl->offset;
size = smpl->size;
cts = mCurrentTime + smpl->compositionOffset;
/* Composition Time Stamp cannot be negative. Some files have video Sample
* Time(STTS)delta with zero value(b/117402420). Hence subtract only
* min(cts, mElstShiftStartTicks), so that audio tracks can be played.
*/
cts -= std::min(cts, mElstShiftStartTicks);
mCurrentTime += smpl->duration;
isSyncSample = (mCurrentSampleIndex == 0);
status_t err = mBufferGroup->acquire_buffer(&mBuffer);
if (err != OK) {
CHECK(mBuffer == NULL);
ALOGV("acquire_buffer returned %d", err);
return AMEDIA_ERROR_UNKNOWN;
}
if (size > mBuffer->size()) {
ALOGE("buffer too small: %zu > %zu", size, mBuffer->size());
mBuffer->release();
mBuffer = NULL;
return AMEDIA_ERROR_UNKNOWN;
}
}
const Sample *smpl = &mCurrentSamples[mCurrentSampleIndex];
AMediaFormat *bufmeta = mBuffer->meta_data();
AMediaFormat_clear(bufmeta);
if (smpl->encryptedsizes.size()) {
// store clear/encrypted lengths in metadata
AMediaFormat_setBuffer(bufmeta, AMEDIAFORMAT_KEY_CRYPTO_PLAIN_SIZES,
smpl->clearsizes.array(), smpl->clearsizes.size() * 4);
AMediaFormat_setBuffer(bufmeta, AMEDIAFORMAT_KEY_CRYPTO_ENCRYPTED_SIZES,
smpl->encryptedsizes.array(), smpl->encryptedsizes.size() * 4);
AMediaFormat_setInt32(bufmeta, AMEDIAFORMAT_KEY_CRYPTO_DEFAULT_IV_SIZE, mDefaultIVSize);
AMediaFormat_setInt32(bufmeta, AMEDIAFORMAT_KEY_CRYPTO_MODE, mCryptoMode);
AMediaFormat_setBuffer(bufmeta, AMEDIAFORMAT_KEY_CRYPTO_KEY, mCryptoKey, 16);
AMediaFormat_setInt32(bufmeta,
AMEDIAFORMAT_KEY_CRYPTO_ENCRYPTED_BYTE_BLOCK, mDefaultEncryptedByteBlock);
AMediaFormat_setInt32(bufmeta,
AMEDIAFORMAT_KEY_CRYPTO_SKIP_BYTE_BLOCK, mDefaultSkipByteBlock);
void *iv = NULL;
size_t ivlength = 0;
if (!AMediaFormat_getBuffer(mFormat,
"crypto-iv", &iv, &ivlength)) {
iv = (void *) smpl->iv;
ivlength = 16; // use 16 or the actual size?
}
AMediaFormat_setBuffer(bufmeta, AMEDIAFORMAT_KEY_CRYPTO_IV, iv, ivlength);
}
if (!mIsAVC && !mIsHEVC) {
if (newBuffer) {
if (!isInRange((size_t)0u, mBuffer->size(), size)) {
mBuffer->release();
mBuffer = NULL;
ALOGE("fragmentedRead ERROR_MALFORMED size %zu", size);
return AMEDIA_ERROR_MALFORMED;
}
ssize_t num_bytes_read =
mDataSource->readAt(offset, (uint8_t *)mBuffer->data(), size);
if (num_bytes_read < (ssize_t)size) {
mBuffer->release();
mBuffer = NULL;
ALOGE("i/o error");
return AMEDIA_ERROR_IO;
}
CHECK(mBuffer != NULL);
mBuffer->set_range(0, size);
AMediaFormat_setInt64(bufmeta,
AMEDIAFORMAT_KEY_TIME_US, ((long double)cts * 1000000) / mTimescale);
AMediaFormat_setInt64(bufmeta,
AMEDIAFORMAT_KEY_DURATION, ((long double)smpl->duration * 1000000) / mTimescale);
if (targetSampleTimeUs >= 0) {
AMediaFormat_setInt64(bufmeta, AMEDIAFORMAT_KEY_TARGET_TIME, targetSampleTimeUs);
}
if (mIsAVC) {
uint32_t layerId = FindAVCLayerId(
(const uint8_t *)mBuffer->data(), mBuffer->range_length());
AMediaFormat_setInt32(bufmeta, AMEDIAFORMAT_KEY_TEMPORAL_LAYER_ID, layerId);
} else if (mIsHEVC) {
int32_t layerId = parseHEVCLayerId(
(const uint8_t *)mBuffer->data(), mBuffer->range_length());
if (layerId >= 0) {
AMediaFormat_setInt32(bufmeta, AMEDIAFORMAT_KEY_TEMPORAL_LAYER_ID, layerId);
}
}
if (isSyncSample) {
AMediaFormat_setInt32(bufmeta, AMEDIAFORMAT_KEY_IS_SYNC_FRAME, 1);
}
++mCurrentSampleIndex;
}
*out = mBuffer;
mBuffer = NULL;
return AMEDIA_OK;
} else {
ALOGV("whole NAL");
// Whole NAL units are returned but each fragment is prefixed by
// the start code (0x00 00 00 01).
ssize_t num_bytes_read = 0;
void *data = NULL;
bool isMalFormed = false;
int32_t max_size;
if (!AMediaFormat_getInt32(mFormat, AMEDIAFORMAT_KEY_MAX_INPUT_SIZE, &max_size)
|| !isInRange((size_t)0u, (size_t)max_size, size)) {
isMalFormed = true;
} else {
data = mSrcBuffer;
}
if (isMalFormed || data == NULL) {
ALOGE("isMalFormed size %zu", size);
if (mBuffer != NULL) {
mBuffer->release();
mBuffer = NULL;
}
return AMEDIA_ERROR_MALFORMED;
}
num_bytes_read = mDataSource->readAt(offset, data, size);
if (num_bytes_read < (ssize_t)size) {
mBuffer->release();
mBuffer = NULL;
ALOGE("i/o error");
return AMEDIA_ERROR_IO;
}
uint8_t *dstData = (uint8_t *)mBuffer->data();
size_t srcOffset = 0;
size_t dstOffset = 0;
while (srcOffset < size) {
isMalFormed = !isInRange((size_t)0u, size, srcOffset, mNALLengthSize);
size_t nalLength = 0;
if (!isMalFormed) {
nalLength = parseNALSize(&mSrcBuffer[srcOffset]);
srcOffset += mNALLengthSize;
isMalFormed = !isInRange((size_t)0u, size, srcOffset, nalLength)
|| !isInRange((size_t)0u, mBuffer->size(), dstOffset, (size_t)4u)
|| !isInRange((size_t)0u, mBuffer->size(), dstOffset + 4, nalLength);
}
if (isMalFormed) {
ALOGE("Video is malformed; nalLength %zu", nalLength);
mBuffer->release();
mBuffer = NULL;
return AMEDIA_ERROR_MALFORMED;
}
if (nalLength == 0) {
continue;
}
if (dstOffset > SIZE_MAX - 4 ||
dstOffset + 4 > SIZE_MAX - nalLength ||
dstOffset + 4 + nalLength > mBuffer->size()) {
ALOGE("b/26365349 : %zu %zu", dstOffset, mBuffer->size());
android_errorWriteLog(0x534e4554, "26365349");
mBuffer->release();
mBuffer = NULL;
return AMEDIA_ERROR_MALFORMED;
}
dstData[dstOffset++] = 0;
dstData[dstOffset++] = 0;
dstData[dstOffset++] = 0;
dstData[dstOffset++] = 1;
memcpy(&dstData[dstOffset], &mSrcBuffer[srcOffset], nalLength);
srcOffset += nalLength;
dstOffset += nalLength;
}
CHECK_EQ(srcOffset, size);
CHECK(mBuffer != NULL);
mBuffer->set_range(0, dstOffset);
AMediaFormat *bufmeta = mBuffer->meta_data();
AMediaFormat_setInt64(bufmeta,
AMEDIAFORMAT_KEY_TIME_US, ((long double)cts * 1000000) / mTimescale);
AMediaFormat_setInt64(bufmeta,
AMEDIAFORMAT_KEY_DURATION, ((long double)smpl->duration * 1000000) / mTimescale);
if (targetSampleTimeUs >= 0) {
AMediaFormat_setInt64(bufmeta, AMEDIAFORMAT_KEY_TARGET_TIME, targetSampleTimeUs);
}
if (isSyncSample) {
AMediaFormat_setInt32(bufmeta, AMEDIAFORMAT_KEY_IS_SYNC_FRAME, 1);
}
++mCurrentSampleIndex;
*out = mBuffer;
mBuffer = NULL;
return AMEDIA_OK;
}
return AMEDIA_OK;
}
MPEG4Extractor::Track *MPEG4Extractor::findTrackByMimePrefix(
const char *mimePrefix) {
for (Track *track = mFirstTrack; track != NULL; track = track->next) {
const char *mime;
if (AMediaFormat_getString(track->meta, AMEDIAFORMAT_KEY_MIME, &mime)
&& !strncasecmp(mime, mimePrefix, strlen(mimePrefix))) {
return track;
}
}
return NULL;
}
static bool LegacySniffMPEG4(DataSourceHelper *source, float *confidence) {
uint8_t header[8];
ssize_t n = source->readAt(4, header, sizeof(header));
if (n < (ssize_t)sizeof(header)) {
return false;
}
if (!memcmp(header, "ftyp3gp", 7) || !memcmp(header, "ftypmp42", 8)
|| !memcmp(header, "ftyp3gr6", 8) || !memcmp(header, "ftyp3gs6", 8)
|| !memcmp(header, "ftyp3ge6", 8) || !memcmp(header, "ftyp3gg6", 8)
|| !memcmp(header, "ftypisom", 8) || !memcmp(header, "ftypM4V ", 8)
|| !memcmp(header, "ftypM4A ", 8) || !memcmp(header, "ftypf4v ", 8)
|| !memcmp(header, "ftypkddi", 8) || !memcmp(header, "ftypM4VP", 8)
|| !memcmp(header, "ftypmif1", 8) || !memcmp(header, "ftypheic", 8)
|| !memcmp(header, "ftypmsf1", 8) || !memcmp(header, "ftyphevc", 8)) {
*confidence = 0.4;
return true;
}
return false;
}
static bool isCompatibleBrand(uint32_t fourcc) {
static const uint32_t kCompatibleBrands[] = {
FOURCC("isom"),
FOURCC("iso2"),
FOURCC("avc1"),
FOURCC("hvc1"),
FOURCC("hev1"),
FOURCC("av01"),
FOURCC("3gp4"),
FOURCC("mp41"),
FOURCC("mp42"),
FOURCC("dash"),
FOURCC("nvr1"),
// Won't promise that the following file types can be played.
// Just give these file types a chance.
FOURCC("qt "), // Apple's QuickTime
FOURCC("MSNV"), // Sony's PSP
FOURCC("wmf "),
FOURCC("3g2a"), // 3GPP2
FOURCC("3g2b"),
FOURCC("mif1"), // HEIF image
FOURCC("heic"), // HEIF image
FOURCC("msf1"), // HEIF image sequence
FOURCC("hevc"), // HEIF image sequence
};
for (size_t i = 0;
i < sizeof(kCompatibleBrands) / sizeof(kCompatibleBrands[0]);
++i) {
if (kCompatibleBrands[i] == fourcc) {
return true;
}
}
return false;
}
// Attempt to actually parse the 'ftyp' atom and determine if a suitable
// compatible brand is present.
// Also try to identify where this file's metadata ends
// (end of the 'moov' atom) and report it to the caller as part of
// the metadata.
static bool BetterSniffMPEG4(DataSourceHelper *source, float *confidence) {
// We scan up to 128 bytes to identify this file as an MP4.
static const off64_t kMaxScanOffset = 128ll;
off64_t offset = 0ll;
bool foundGoodFileType = false;
off64_t moovAtomEndOffset = -1ll;
bool done = false;
while (!done && offset < kMaxScanOffset) {
uint32_t hdr[2];
if (source->readAt(offset, hdr, 8) < 8) {
return false;
}
uint64_t chunkSize = ntohl(hdr[0]);
uint32_t chunkType = ntohl(hdr[1]);
off64_t chunkDataOffset = offset + 8;
if (chunkSize == 1) {
if (source->readAt(offset + 8, &chunkSize, 8) < 8) {
return false;
}
chunkSize = ntoh64(chunkSize);
chunkDataOffset += 8;
if (chunkSize < 16) {
// The smallest valid chunk is 16 bytes long in this case.
return false;
}
} else if (chunkSize < 8) {
// The smallest valid chunk is 8 bytes long.
return false;
}
// (data_offset - offset) is either 8 or 16
off64_t chunkDataSize = chunkSize - (chunkDataOffset - offset);
if (chunkDataSize < 0) {
ALOGE("b/23540914");
return false;
}
char chunkstring[5];
MakeFourCCString(chunkType, chunkstring);
ALOGV("saw chunk type %s, size %" PRIu64 " @ %lld",
chunkstring, chunkSize, (long long)offset);
switch (chunkType) {
case FOURCC("ftyp"):
{
if (chunkDataSize < 8) {
return false;
}
uint32_t numCompatibleBrands = (chunkDataSize - 8) / 4;
for (size_t i = 0; i < numCompatibleBrands + 2; ++i) {
if (i == 1) {
// Skip this index, it refers to the minorVersion,
// not a brand.
continue;
}
uint32_t brand;
if (source->readAt(
chunkDataOffset + 4 * i, &brand, 4) < 4) {
return false;
}
brand = ntohl(brand);
if (isCompatibleBrand(brand)) {
foundGoodFileType = true;
break;
}
}
if (!foundGoodFileType) {
return false;
}
break;
}
case FOURCC("moov"):
{
moovAtomEndOffset = offset + chunkSize;
done = true;
break;
}
default:
break;
}
offset += chunkSize;
}
if (!foundGoodFileType) {
return false;
}
*confidence = 0.4f;
return true;
}
static CMediaExtractor* CreateExtractor(CDataSource *source, void *) {
return wrap(new MPEG4Extractor(new DataSourceHelper(source)));
}
static CreatorFunc Sniff(
CDataSource *source, float *confidence, void **,
FreeMetaFunc *) {
DataSourceHelper helper(source);
if (BetterSniffMPEG4(&helper, confidence)) {
return CreateExtractor;
}
if (LegacySniffMPEG4(&helper, confidence)) {
ALOGW("Identified supported mpeg4 through LegacySniffMPEG4.");
return CreateExtractor;
}
return NULL;
}
static const char *extensions[] = {
"3g2",
"3ga",
"3gp",
"3gpp",
"3gpp2",
"m4a",
"m4r",
"m4v",
"mov",
"mp4",
"qt",
NULL
};
extern "C" {
// This is the only symbol that needs to be exported
__attribute__ ((visibility ("default")))
ExtractorDef GETEXTRACTORDEF() {
return {
EXTRACTORDEF_VERSION,
UUID("27575c67-4417-4c54-8d3d-8e626985a164"),
2, // version
"MP4 Extractor",
{ .v3 = {Sniff, extensions} },
};
}
} // extern "C"
} // namespace android