blob: 0e347899282bc378c869c2a186cd30428af3406d [file] [log] [blame]
/*
**
** Copyright 2008, 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 "MediaMetadataRetrieverJNI"
#include <assert.h>
#include <utils/Log.h>
#include <utils/threads.h>
#include <core/SkBitmap.h>
#include <media/mediametadataretriever.h>
#include <media/mediascanner.h>
#include <private/media/VideoFrame.h>
#include "jni.h"
#include "JNIHelp.h"
#include "android_runtime/AndroidRuntime.h"
#include "android_media_Utils.h"
using namespace android;
struct fields_t {
jfieldID context;
jclass bitmapClazz; // Must be a global ref
jfieldID nativeBitmap;
jmethodID createBitmapMethod;
jmethodID createScaledBitmapMethod;
jclass configClazz; // Must be a global ref
jmethodID createConfigMethod;
};
static fields_t fields;
static Mutex sLock;
static const char* const kClassPathName = "android/media/MediaMetadataRetriever";
static void process_media_retriever_call(JNIEnv *env, status_t opStatus, const char* exception, const char *message)
{
if (opStatus == (status_t) INVALID_OPERATION) {
jniThrowException(env, "java/lang/IllegalStateException", NULL);
} else if (opStatus != (status_t) OK) {
if (strlen(message) > 230) {
// If the message is too long, don't bother displaying the status code.
jniThrowException( env, exception, message);
} else {
char msg[256];
// Append the status code to the message.
sprintf(msg, "%s: status = 0x%X", message, opStatus);
jniThrowException( env, exception, msg);
}
}
}
static MediaMetadataRetriever* getRetriever(JNIEnv* env, jobject thiz)
{
// No lock is needed, since it is called internally by other methods that are protected
MediaMetadataRetriever* retriever = (MediaMetadataRetriever*) env->GetLongField(thiz, fields.context);
return retriever;
}
static void setRetriever(JNIEnv* env, jobject thiz, MediaMetadataRetriever* retriever)
{
// No lock is needed, since it is called internally by other methods that are protected
MediaMetadataRetriever *old = (MediaMetadataRetriever*) env->GetLongField(thiz, fields.context);
env->SetLongField(thiz, fields.context, (jlong) retriever);
}
static void
android_media_MediaMetadataRetriever_setDataSourceAndHeaders(
JNIEnv *env, jobject thiz, jstring path,
jobjectArray keys, jobjectArray values) {
ALOGV("setDataSource");
MediaMetadataRetriever* retriever = getRetriever(env, thiz);
if (retriever == 0) {
jniThrowException(
env,
"java/lang/IllegalStateException", "No retriever available");
return;
}
if (!path) {
jniThrowException(
env, "java/lang/IllegalArgumentException", "Null pointer");
return;
}
const char *tmp = env->GetStringUTFChars(path, NULL);
if (!tmp) { // OutOfMemoryError exception already thrown
return;
}
String8 pathStr(tmp);
env->ReleaseStringUTFChars(path, tmp);
tmp = NULL;
// Don't let somebody trick us in to reading some random block of memory
if (strncmp("mem://", pathStr.string(), 6) == 0) {
jniThrowException(
env, "java/lang/IllegalArgumentException", "Invalid pathname");
return;
}
// We build a similar KeyedVector out of it.
KeyedVector<String8, String8> headersVector;
if (!ConvertKeyValueArraysToKeyedVector(
env, keys, values, &headersVector)) {
return;
}
process_media_retriever_call(
env,
retriever->setDataSource(
pathStr.string(), headersVector.size() > 0 ? &headersVector : NULL),
"java/lang/RuntimeException",
"setDataSource failed");
}
static void android_media_MediaMetadataRetriever_setDataSourceFD(JNIEnv *env, jobject thiz, jobject fileDescriptor, jlong offset, jlong length)
{
ALOGV("setDataSource");
MediaMetadataRetriever* retriever = getRetriever(env, thiz);
if (retriever == 0) {
jniThrowException(env, "java/lang/IllegalStateException", "No retriever available");
return;
}
if (!fileDescriptor) {
jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
return;
}
int fd = jniGetFDFromFileDescriptor(env, fileDescriptor);
if (offset < 0 || length < 0 || fd < 0) {
if (offset < 0) {
ALOGE("negative offset (%lld)", (long long)offset);
}
if (length < 0) {
ALOGE("negative length (%lld)", (long long)length);
}
if (fd < 0) {
ALOGE("invalid file descriptor");
}
jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
return;
}
process_media_retriever_call(env, retriever->setDataSource(fd, offset, length), "java/lang/RuntimeException", "setDataSource failed");
}
template<typename T>
static void rotate0(T* dst, const T* src, size_t width, size_t height)
{
memcpy(dst, src, width * height * sizeof(T));
}
template<typename T>
static void rotate90(T* dst, const T* src, size_t width, size_t height)
{
for (size_t i = 0; i < height; ++i) {
for (size_t j = 0; j < width; ++j) {
dst[j * height + height - 1 - i] = src[i * width + j];
}
}
}
template<typename T>
static void rotate180(T* dst, const T* src, size_t width, size_t height)
{
for (size_t i = 0; i < height; ++i) {
for (size_t j = 0; j < width; ++j) {
dst[(height - 1 - i) * width + width - 1 - j] = src[i * width + j];
}
}
}
template<typename T>
static void rotate270(T* dst, const T* src, size_t width, size_t height)
{
for (size_t i = 0; i < height; ++i) {
for (size_t j = 0; j < width; ++j) {
dst[(width - 1 - j) * height + i] = src[i * width + j];
}
}
}
template<typename T>
static void rotate(T *dst, const T *src, size_t width, size_t height, int angle)
{
switch (angle) {
case 0:
rotate0(dst, src, width, height);
break;
case 90:
rotate90(dst, src, width, height);
break;
case 180:
rotate180(dst, src, width, height);
break;
case 270:
rotate270(dst, src, width, height);
break;
}
}
static jobject android_media_MediaMetadataRetriever_getFrameAtTime(JNIEnv *env, jobject thiz, jlong timeUs, jint option)
{
ALOGV("getFrameAtTime: %lld us option: %d", timeUs, option);
MediaMetadataRetriever* retriever = getRetriever(env, thiz);
if (retriever == 0) {
jniThrowException(env, "java/lang/IllegalStateException", "No retriever available");
return NULL;
}
// Call native method to retrieve a video frame
VideoFrame *videoFrame = NULL;
sp<IMemory> frameMemory = retriever->getFrameAtTime(timeUs, option);
if (frameMemory != 0) { // cast the shared structure to a VideoFrame object
videoFrame = static_cast<VideoFrame *>(frameMemory->pointer());
}
if (videoFrame == NULL) {
ALOGE("getFrameAtTime: videoFrame is a NULL pointer");
return NULL;
}
ALOGV("Dimension = %dx%d and bytes = %d",
videoFrame->mDisplayWidth,
videoFrame->mDisplayHeight,
videoFrame->mSize);
jobject config = env->CallStaticObjectMethod(
fields.configClazz,
fields.createConfigMethod,
SkBitmap::kRGB_565_Config);
uint32_t width, height;
bool swapWidthAndHeight = false;
if (videoFrame->mRotationAngle == 90 || videoFrame->mRotationAngle == 270) {
width = videoFrame->mHeight;
height = videoFrame->mWidth;
swapWidthAndHeight = true;
} else {
width = videoFrame->mWidth;
height = videoFrame->mHeight;
}
jobject jBitmap = env->CallStaticObjectMethod(
fields.bitmapClazz,
fields.createBitmapMethod,
width,
height,
config);
if (jBitmap == NULL) {
if (env->ExceptionCheck()) {
env->ExceptionClear();
}
ALOGE("getFrameAtTime: create Bitmap failed!");
return NULL;
}
SkBitmap *bitmap =
(SkBitmap *) env->GetLongField(jBitmap, fields.nativeBitmap);
bitmap->lockPixels();
rotate((uint16_t*)bitmap->getPixels(),
(uint16_t*)((char*)videoFrame + sizeof(VideoFrame)),
videoFrame->mWidth,
videoFrame->mHeight,
videoFrame->mRotationAngle);
bitmap->unlockPixels();
if (videoFrame->mDisplayWidth != videoFrame->mWidth ||
videoFrame->mDisplayHeight != videoFrame->mHeight) {
uint32_t displayWidth = videoFrame->mDisplayWidth;
uint32_t displayHeight = videoFrame->mDisplayHeight;
if (swapWidthAndHeight) {
displayWidth = videoFrame->mDisplayHeight;
displayHeight = videoFrame->mDisplayWidth;
}
ALOGV("Bitmap dimension is scaled from %dx%d to %dx%d",
width, height, displayWidth, displayHeight);
jobject scaledBitmap = env->CallStaticObjectMethod(fields.bitmapClazz,
fields.createScaledBitmapMethod,
jBitmap,
displayWidth,
displayHeight,
true);
return scaledBitmap;
}
return jBitmap;
}
static jbyteArray android_media_MediaMetadataRetriever_getEmbeddedPicture(
JNIEnv *env, jobject thiz, jint pictureType)
{
ALOGV("getEmbeddedPicture: %d", pictureType);
MediaMetadataRetriever* retriever = getRetriever(env, thiz);
if (retriever == 0) {
jniThrowException(env, "java/lang/IllegalStateException", "No retriever available");
return NULL;
}
MediaAlbumArt* mediaAlbumArt = NULL;
// FIXME:
// Use pictureType to retrieve the intended embedded picture and also change
// the method name to getEmbeddedPicture().
sp<IMemory> albumArtMemory = retriever->extractAlbumArt();
if (albumArtMemory != 0) { // cast the shared structure to a MediaAlbumArt object
mediaAlbumArt = static_cast<MediaAlbumArt *>(albumArtMemory->pointer());
}
if (mediaAlbumArt == NULL) {
ALOGE("getEmbeddedPicture: Call to getEmbeddedPicture failed.");
return NULL;
}
jbyteArray array = env->NewByteArray(mediaAlbumArt->size());
if (!array) { // OutOfMemoryError exception has already been thrown.
ALOGE("getEmbeddedPicture: OutOfMemoryError is thrown.");
} else {
const jbyte* data =
reinterpret_cast<const jbyte*>(mediaAlbumArt->data());
env->SetByteArrayRegion(array, 0, mediaAlbumArt->size(), data);
}
// No need to delete mediaAlbumArt here
return array;
}
static jobject android_media_MediaMetadataRetriever_extractMetadata(JNIEnv *env, jobject thiz, jint keyCode)
{
ALOGV("extractMetadata");
MediaMetadataRetriever* retriever = getRetriever(env, thiz);
if (retriever == 0) {
jniThrowException(env, "java/lang/IllegalStateException", "No retriever available");
return NULL;
}
const char* value = retriever->extractMetadata(keyCode);
if (!value) {
ALOGV("extractMetadata: Metadata is not found");
return NULL;
}
ALOGV("extractMetadata: value (%s) for keyCode(%d)", value, keyCode);
return env->NewStringUTF(value);
}
static void android_media_MediaMetadataRetriever_release(JNIEnv *env, jobject thiz)
{
ALOGV("release");
Mutex::Autolock lock(sLock);
MediaMetadataRetriever* retriever = getRetriever(env, thiz);
delete retriever;
setRetriever(env, thiz, (MediaMetadataRetriever*) 0);
}
static void android_media_MediaMetadataRetriever_native_finalize(JNIEnv *env, jobject thiz)
{
ALOGV("native_finalize");
// No lock is needed, since android_media_MediaMetadataRetriever_release() is protected
android_media_MediaMetadataRetriever_release(env, thiz);
}
// This function gets a field ID, which in turn causes class initialization.
// It is called from a static block in MediaMetadataRetriever, which won't run until the
// first time an instance of this class is used.
static void android_media_MediaMetadataRetriever_native_init(JNIEnv *env)
{
jclass clazz = env->FindClass(kClassPathName);
if (clazz == NULL) {
return;
}
fields.context = env->GetFieldID(clazz, "mNativeContext", "J");
if (fields.context == NULL) {
return;
}
jclass bitmapClazz = env->FindClass("android/graphics/Bitmap");
if (bitmapClazz == NULL) {
return;
}
fields.bitmapClazz = (jclass) env->NewGlobalRef(bitmapClazz);
if (fields.bitmapClazz == NULL) {
return;
}
fields.createBitmapMethod =
env->GetStaticMethodID(fields.bitmapClazz, "createBitmap",
"(IILandroid/graphics/Bitmap$Config;)"
"Landroid/graphics/Bitmap;");
if (fields.createBitmapMethod == NULL) {
return;
}
fields.createScaledBitmapMethod =
env->GetStaticMethodID(fields.bitmapClazz, "createScaledBitmap",
"(Landroid/graphics/Bitmap;IIZ)"
"Landroid/graphics/Bitmap;");
if (fields.createScaledBitmapMethod == NULL) {
return;
}
fields.nativeBitmap = env->GetFieldID(fields.bitmapClazz, "mNativeBitmap", "J");
if (fields.nativeBitmap == NULL) {
return;
}
jclass configClazz = env->FindClass("android/graphics/Bitmap$Config");
if (configClazz == NULL) {
return;
}
fields.configClazz = (jclass) env->NewGlobalRef(configClazz);
if (fields.configClazz == NULL) {
return;
}
fields.createConfigMethod =
env->GetStaticMethodID(fields.configClazz, "nativeToConfig",
"(I)Landroid/graphics/Bitmap$Config;");
if (fields.createConfigMethod == NULL) {
return;
}
}
static void android_media_MediaMetadataRetriever_native_setup(JNIEnv *env, jobject thiz)
{
ALOGV("native_setup");
MediaMetadataRetriever* retriever = new MediaMetadataRetriever();
if (retriever == 0) {
jniThrowException(env, "java/lang/RuntimeException", "Out of memory");
return;
}
setRetriever(env, thiz, retriever);
}
// JNI mapping between Java methods and native methods
static JNINativeMethod nativeMethods[] = {
{
"_setDataSource",
"(Ljava/lang/String;[Ljava/lang/String;[Ljava/lang/String;)V",
(void *)android_media_MediaMetadataRetriever_setDataSourceAndHeaders
},
{"setDataSource", "(Ljava/io/FileDescriptor;JJ)V", (void *)android_media_MediaMetadataRetriever_setDataSourceFD},
{"_getFrameAtTime", "(JI)Landroid/graphics/Bitmap;", (void *)android_media_MediaMetadataRetriever_getFrameAtTime},
{"extractMetadata", "(I)Ljava/lang/String;", (void *)android_media_MediaMetadataRetriever_extractMetadata},
{"getEmbeddedPicture", "(I)[B", (void *)android_media_MediaMetadataRetriever_getEmbeddedPicture},
{"release", "()V", (void *)android_media_MediaMetadataRetriever_release},
{"native_finalize", "()V", (void *)android_media_MediaMetadataRetriever_native_finalize},
{"native_setup", "()V", (void *)android_media_MediaMetadataRetriever_native_setup},
{"native_init", "()V", (void *)android_media_MediaMetadataRetriever_native_init},
};
// This function only registers the native methods, and is called from
// JNI_OnLoad in android_media_MediaPlayer.cpp
int register_android_media_MediaMetadataRetriever(JNIEnv *env)
{
return AndroidRuntime::registerNativeMethods
(env, kClassPathName, nativeMethods, NELEM(nativeMethods));
}