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-rw-r--r--libs/ultrahdr/jpegdecoderhelper.cpp499
1 files changed, 499 insertions, 0 deletions
diff --git a/libs/ultrahdr/jpegdecoderhelper.cpp b/libs/ultrahdr/jpegdecoderhelper.cpp
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+/*
+ * Copyright 2022 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.
+ */
+
+#include <ultrahdr/jpegdecoderhelper.h>
+
+#include <utils/Log.h>
+
+#include <errno.h>
+#include <setjmp.h>
+#include <string>
+
+using namespace std;
+
+namespace android::ultrahdr {
+
+#define ALIGNM(x, m) ((((x) + ((m) - 1)) / (m)) * (m))
+
+const uint32_t kAPP0Marker = JPEG_APP0; // JFIF
+const uint32_t kAPP1Marker = JPEG_APP0 + 1; // EXIF, XMP
+const uint32_t kAPP2Marker = JPEG_APP0 + 2; // ICC
+
+const std::string kXmpNameSpace = "http://ns.adobe.com/xap/1.0/";
+const std::string kExifIdCode = "Exif";
+constexpr uint32_t kICCMarkerHeaderSize = 14;
+constexpr uint8_t kICCSig[] = {
+ 'I', 'C', 'C', '_', 'P', 'R', 'O', 'F', 'I', 'L', 'E', '\0',
+};
+
+struct jpegr_source_mgr : jpeg_source_mgr {
+ jpegr_source_mgr(const uint8_t* ptr, int len);
+ ~jpegr_source_mgr();
+
+ const uint8_t* mBufferPtr;
+ size_t mBufferLength;
+};
+
+struct jpegrerror_mgr {
+ struct jpeg_error_mgr pub;
+ jmp_buf setjmp_buffer;
+};
+
+static void jpegr_init_source(j_decompress_ptr cinfo) {
+ jpegr_source_mgr* src = static_cast<jpegr_source_mgr*>(cinfo->src);
+ src->next_input_byte = static_cast<const JOCTET*>(src->mBufferPtr);
+ src->bytes_in_buffer = src->mBufferLength;
+}
+
+static boolean jpegr_fill_input_buffer(j_decompress_ptr /* cinfo */) {
+ ALOGE("%s : should not get here", __func__);
+ return FALSE;
+}
+
+static void jpegr_skip_input_data(j_decompress_ptr cinfo, long num_bytes) {
+ jpegr_source_mgr* src = static_cast<jpegr_source_mgr*>(cinfo->src);
+
+ if (num_bytes > static_cast<long>(src->bytes_in_buffer)) {
+ ALOGE("jpegr_skip_input_data - num_bytes > (long)src->bytes_in_buffer");
+ } else {
+ src->next_input_byte += num_bytes;
+ src->bytes_in_buffer -= num_bytes;
+ }
+}
+
+static void jpegr_term_source(j_decompress_ptr /*cinfo*/) {}
+
+jpegr_source_mgr::jpegr_source_mgr(const uint8_t* ptr, int len) :
+ mBufferPtr(ptr), mBufferLength(len) {
+ init_source = jpegr_init_source;
+ fill_input_buffer = jpegr_fill_input_buffer;
+ skip_input_data = jpegr_skip_input_data;
+ resync_to_restart = jpeg_resync_to_restart;
+ term_source = jpegr_term_source;
+}
+
+jpegr_source_mgr::~jpegr_source_mgr() {}
+
+static void jpegrerror_exit(j_common_ptr cinfo) {
+ jpegrerror_mgr* err = reinterpret_cast<jpegrerror_mgr*>(cinfo->err);
+ longjmp(err->setjmp_buffer, 1);
+}
+
+JpegDecoderHelper::JpegDecoderHelper() {
+}
+
+JpegDecoderHelper::~JpegDecoderHelper() {
+}
+
+bool JpegDecoderHelper::decompressImage(const void* image, int length, bool decodeToRGBA) {
+ if (image == nullptr || length <= 0) {
+ ALOGE("Image size can not be handled: %d", length);
+ return false;
+ }
+
+ mResultBuffer.clear();
+ mXMPBuffer.clear();
+ if (!decode(image, length, decodeToRGBA)) {
+ return false;
+ }
+
+ return true;
+}
+
+void* JpegDecoderHelper::getDecompressedImagePtr() {
+ return mResultBuffer.data();
+}
+
+size_t JpegDecoderHelper::getDecompressedImageSize() {
+ return mResultBuffer.size();
+}
+
+void* JpegDecoderHelper::getXMPPtr() {
+ return mXMPBuffer.data();
+}
+
+size_t JpegDecoderHelper::getXMPSize() {
+ return mXMPBuffer.size();
+}
+
+void* JpegDecoderHelper::getEXIFPtr() {
+ return mEXIFBuffer.data();
+}
+
+size_t JpegDecoderHelper::getEXIFSize() {
+ return mEXIFBuffer.size();
+}
+
+void* JpegDecoderHelper::getICCPtr() {
+ return mICCBuffer.data();
+}
+
+size_t JpegDecoderHelper::getICCSize() {
+ return mICCBuffer.size();
+}
+
+size_t JpegDecoderHelper::getDecompressedImageWidth() {
+ return mWidth;
+}
+
+size_t JpegDecoderHelper::getDecompressedImageHeight() {
+ return mHeight;
+}
+
+bool JpegDecoderHelper::decode(const void* image, int length, bool decodeToRGBA) {
+ jpeg_decompress_struct cinfo;
+ jpegr_source_mgr mgr(static_cast<const uint8_t*>(image), length);
+ jpegrerror_mgr myerr;
+ bool status = true;
+
+ cinfo.err = jpeg_std_error(&myerr.pub);
+ myerr.pub.error_exit = jpegrerror_exit;
+
+ if (setjmp(myerr.setjmp_buffer)) {
+ jpeg_destroy_decompress(&cinfo);
+ return false;
+ }
+ jpeg_create_decompress(&cinfo);
+
+ jpeg_save_markers(&cinfo, kAPP0Marker, 0xFFFF);
+ jpeg_save_markers(&cinfo, kAPP1Marker, 0xFFFF);
+ jpeg_save_markers(&cinfo, kAPP2Marker, 0xFFFF);
+
+ cinfo.src = &mgr;
+ jpeg_read_header(&cinfo, TRUE);
+
+ // Save XMP data, EXIF data, and ICC data.
+ // Here we only handle the first XMP / EXIF / ICC package.
+ // We assume that all packages are starting with two bytes marker (eg FF E1 for EXIF package),
+ // two bytes of package length which is stored in marker->original_length, and the real data
+ // which is stored in marker->data.
+ bool exifAppears = false;
+ bool xmpAppears = false;
+ bool iccAppears = false;
+ for (jpeg_marker_struct* marker = cinfo.marker_list;
+ marker && !(exifAppears && xmpAppears && iccAppears);
+ marker = marker->next) {
+
+ if (marker->marker != kAPP1Marker && marker->marker != kAPP2Marker) {
+ continue;
+ }
+ const unsigned int len = marker->data_length;
+ if (!xmpAppears &&
+ len > kXmpNameSpace.size() &&
+ !strncmp(reinterpret_cast<const char*>(marker->data),
+ kXmpNameSpace.c_str(),
+ kXmpNameSpace.size())) {
+ mXMPBuffer.resize(len+1, 0);
+ memcpy(static_cast<void*>(mXMPBuffer.data()), marker->data, len);
+ xmpAppears = true;
+ } else if (!exifAppears &&
+ len > kExifIdCode.size() &&
+ !strncmp(reinterpret_cast<const char*>(marker->data),
+ kExifIdCode.c_str(),
+ kExifIdCode.size())) {
+ mEXIFBuffer.resize(len, 0);
+ memcpy(static_cast<void*>(mEXIFBuffer.data()), marker->data, len);
+ exifAppears = true;
+ } else if (!iccAppears &&
+ len > sizeof(kICCSig) &&
+ !memcmp(marker->data, kICCSig, sizeof(kICCSig))) {
+ mICCBuffer.resize(len, 0);
+ memcpy(static_cast<void*>(mICCBuffer.data()), marker->data, len);
+ iccAppears = true;
+ }
+ }
+
+ if (cinfo.image_width > kMaxWidth || cinfo.image_height > kMaxHeight) {
+ // constraint on max width and max height is only due to alloc constraints
+ // tune these values basing on the target device
+ status = false;
+ goto CleanUp;
+ }
+
+ mWidth = cinfo.image_width;
+ mHeight = cinfo.image_height;
+
+ if (decodeToRGBA) {
+ if (cinfo.jpeg_color_space == JCS_GRAYSCALE) {
+ // We don't intend to support decoding grayscale to RGBA
+ status = false;
+ ALOGE("%s: decoding grayscale to RGBA is unsupported", __func__);
+ goto CleanUp;
+ }
+ // 4 bytes per pixel
+ mResultBuffer.resize(cinfo.image_width * cinfo.image_height * 4);
+ cinfo.out_color_space = JCS_EXT_RGBA;
+ } else {
+ if (cinfo.jpeg_color_space == JCS_YCbCr) {
+ if (cinfo.comp_info[0].h_samp_factor != 2 ||
+ cinfo.comp_info[1].h_samp_factor != 1 ||
+ cinfo.comp_info[2].h_samp_factor != 1 ||
+ cinfo.comp_info[0].v_samp_factor != 2 ||
+ cinfo.comp_info[1].v_samp_factor != 1 ||
+ cinfo.comp_info[2].v_samp_factor != 1) {
+ status = false;
+ ALOGE("%s: decoding to YUV only supports 4:2:0 subsampling", __func__);
+ goto CleanUp;
+ }
+ mResultBuffer.resize(cinfo.image_width * cinfo.image_height * 3 / 2, 0);
+ } else if (cinfo.jpeg_color_space == JCS_GRAYSCALE) {
+ mResultBuffer.resize(cinfo.image_width * cinfo.image_height, 0);
+ }
+ cinfo.out_color_space = cinfo.jpeg_color_space;
+ cinfo.raw_data_out = TRUE;
+ }
+
+ cinfo.dct_method = JDCT_IFAST;
+
+ jpeg_start_decompress(&cinfo);
+
+ if (!decompress(&cinfo, static_cast<const uint8_t*>(mResultBuffer.data()),
+ cinfo.jpeg_color_space == JCS_GRAYSCALE)) {
+ status = false;
+ goto CleanUp;
+ }
+
+CleanUp:
+ jpeg_finish_decompress(&cinfo);
+ jpeg_destroy_decompress(&cinfo);
+
+ return status;
+}
+
+bool JpegDecoderHelper::decompress(jpeg_decompress_struct* cinfo, const uint8_t* dest,
+ bool isSingleChannel) {
+ if (isSingleChannel) {
+ return decompressSingleChannel(cinfo, dest);
+ }
+ if (cinfo->out_color_space == JCS_EXT_RGBA)
+ return decompressRGBA(cinfo, dest);
+ else
+ return decompressYUV(cinfo, dest);
+}
+
+bool JpegDecoderHelper::getCompressedImageParameters(const void* image, int length,
+ size_t *pWidth, size_t *pHeight,
+ std::vector<uint8_t> *iccData , std::vector<uint8_t> *exifData) {
+ jpeg_decompress_struct cinfo;
+ jpegr_source_mgr mgr(static_cast<const uint8_t*>(image), length);
+ jpegrerror_mgr myerr;
+ cinfo.err = jpeg_std_error(&myerr.pub);
+ myerr.pub.error_exit = jpegrerror_exit;
+
+ if (setjmp(myerr.setjmp_buffer)) {
+ jpeg_destroy_decompress(&cinfo);
+ return false;
+ }
+ jpeg_create_decompress(&cinfo);
+
+ jpeg_save_markers(&cinfo, kAPP1Marker, 0xFFFF);
+ jpeg_save_markers(&cinfo, kAPP2Marker, 0xFFFF);
+
+ cinfo.src = &mgr;
+ if (jpeg_read_header(&cinfo, TRUE) != JPEG_HEADER_OK) {
+ jpeg_destroy_decompress(&cinfo);
+ return false;
+ }
+
+ if (pWidth != nullptr) {
+ *pWidth = cinfo.image_width;
+ }
+ if (pHeight != nullptr) {
+ *pHeight = cinfo.image_height;
+ }
+
+ if (iccData != nullptr) {
+ for (jpeg_marker_struct* marker = cinfo.marker_list; marker;
+ marker = marker->next) {
+ if (marker->marker != kAPP2Marker) {
+ continue;
+ }
+ if (marker->data_length <= kICCMarkerHeaderSize ||
+ memcmp(marker->data, kICCSig, sizeof(kICCSig)) != 0) {
+ continue;
+ }
+
+ iccData->insert(iccData->end(), marker->data, marker->data + marker->data_length);
+ }
+ }
+
+ if (exifData != nullptr) {
+ bool exifAppears = false;
+ for (jpeg_marker_struct* marker = cinfo.marker_list; marker && !exifAppears;
+ marker = marker->next) {
+ if (marker->marker != kAPP1Marker) {
+ continue;
+ }
+
+ const unsigned int len = marker->data_length;
+ if (len >= kExifIdCode.size() &&
+ !strncmp(reinterpret_cast<const char*>(marker->data), kExifIdCode.c_str(),
+ kExifIdCode.size())) {
+ exifData->resize(len, 0);
+ memcpy(static_cast<void*>(exifData->data()), marker->data, len);
+ exifAppears = true;
+ }
+ }
+ }
+
+ jpeg_destroy_decompress(&cinfo);
+ return true;
+}
+
+bool JpegDecoderHelper::decompressRGBA(jpeg_decompress_struct* cinfo, const uint8_t* dest) {
+ JSAMPLE* decodeDst = (JSAMPLE*) dest;
+ uint32_t lines = 0;
+ // TODO: use batches for more effectiveness
+ while (lines < cinfo->image_height) {
+ uint32_t ret = jpeg_read_scanlines(cinfo, &decodeDst, 1);
+ if (ret == 0) {
+ break;
+ }
+ decodeDst += cinfo->image_width * 4;
+ lines++;
+ }
+ return lines == cinfo->image_height;
+}
+
+bool JpegDecoderHelper::decompressYUV(jpeg_decompress_struct* cinfo, const uint8_t* dest) {
+ JSAMPROW y[kCompressBatchSize];
+ JSAMPROW cb[kCompressBatchSize / 2];
+ JSAMPROW cr[kCompressBatchSize / 2];
+ JSAMPARRAY planes[3] {y, cb, cr};
+
+ size_t y_plane_size = cinfo->image_width * cinfo->image_height;
+ size_t uv_plane_size = y_plane_size / 4;
+ uint8_t* y_plane = const_cast<uint8_t*>(dest);
+ uint8_t* u_plane = const_cast<uint8_t*>(dest + y_plane_size);
+ uint8_t* v_plane = const_cast<uint8_t*>(dest + y_plane_size + uv_plane_size);
+ std::unique_ptr<uint8_t[]> empty = std::make_unique<uint8_t[]>(cinfo->image_width);
+ memset(empty.get(), 0, cinfo->image_width);
+
+ const int aligned_width = ALIGNM(cinfo->image_width, kCompressBatchSize);
+ bool is_width_aligned = (aligned_width == cinfo->image_width);
+ std::unique_ptr<uint8_t[]> buffer_intrm = nullptr;
+ uint8_t* y_plane_intrm = nullptr;
+ uint8_t* u_plane_intrm = nullptr;
+ uint8_t* v_plane_intrm = nullptr;
+ JSAMPROW y_intrm[kCompressBatchSize];
+ JSAMPROW cb_intrm[kCompressBatchSize / 2];
+ JSAMPROW cr_intrm[kCompressBatchSize / 2];
+ JSAMPARRAY planes_intrm[3] {y_intrm, cb_intrm, cr_intrm};
+ if (!is_width_aligned) {
+ size_t mcu_row_size = aligned_width * kCompressBatchSize * 3 / 2;
+ buffer_intrm = std::make_unique<uint8_t[]>(mcu_row_size);
+ y_plane_intrm = buffer_intrm.get();
+ u_plane_intrm = y_plane_intrm + (aligned_width * kCompressBatchSize);
+ v_plane_intrm = u_plane_intrm + (aligned_width * kCompressBatchSize) / 4;
+ for (int i = 0; i < kCompressBatchSize; ++i) {
+ y_intrm[i] = y_plane_intrm + i * aligned_width;
+ }
+ for (int i = 0; i < kCompressBatchSize / 2; ++i) {
+ int offset_intrm = i * (aligned_width / 2);
+ cb_intrm[i] = u_plane_intrm + offset_intrm;
+ cr_intrm[i] = v_plane_intrm + offset_intrm;
+ }
+ }
+
+ while (cinfo->output_scanline < cinfo->image_height) {
+ for (int i = 0; i < kCompressBatchSize; ++i) {
+ size_t scanline = cinfo->output_scanline + i;
+ if (scanline < cinfo->image_height) {
+ y[i] = y_plane + scanline * cinfo->image_width;
+ } else {
+ y[i] = empty.get();
+ }
+ }
+ // cb, cr only have half scanlines
+ for (int i = 0; i < kCompressBatchSize / 2; ++i) {
+ size_t scanline = cinfo->output_scanline / 2 + i;
+ if (scanline < cinfo->image_height / 2) {
+ int offset = scanline * (cinfo->image_width / 2);
+ cb[i] = u_plane + offset;
+ cr[i] = v_plane + offset;
+ } else {
+ cb[i] = cr[i] = empty.get();
+ }
+ }
+
+ int processed = jpeg_read_raw_data(cinfo, is_width_aligned ? planes : planes_intrm,
+ kCompressBatchSize);
+ if (processed != kCompressBatchSize) {
+ ALOGE("Number of processed lines does not equal input lines.");
+ return false;
+ }
+ if (!is_width_aligned) {
+ for (int i = 0; i < kCompressBatchSize; ++i) {
+ memcpy(y[i], y_intrm[i], cinfo->image_width);
+ }
+ for (int i = 0; i < kCompressBatchSize / 2; ++i) {
+ memcpy(cb[i], cb_intrm[i], cinfo->image_width / 2);
+ memcpy(cr[i], cr_intrm[i], cinfo->image_width / 2);
+ }
+ }
+ }
+ return true;
+}
+
+bool JpegDecoderHelper::decompressSingleChannel(jpeg_decompress_struct* cinfo, const uint8_t* dest) {
+ JSAMPROW y[kCompressBatchSize];
+ JSAMPARRAY planes[1] {y};
+
+ uint8_t* y_plane = const_cast<uint8_t*>(dest);
+ std::unique_ptr<uint8_t[]> empty = std::make_unique<uint8_t[]>(cinfo->image_width);
+ memset(empty.get(), 0, cinfo->image_width);
+
+ int aligned_width = ALIGNM(cinfo->image_width, kCompressBatchSize);
+ bool is_width_aligned = (aligned_width == cinfo->image_width);
+ std::unique_ptr<uint8_t[]> buffer_intrm = nullptr;
+ uint8_t* y_plane_intrm = nullptr;
+ JSAMPROW y_intrm[kCompressBatchSize];
+ JSAMPARRAY planes_intrm[1] {y_intrm};
+ if (!is_width_aligned) {
+ size_t mcu_row_size = aligned_width * kCompressBatchSize;
+ buffer_intrm = std::make_unique<uint8_t[]>(mcu_row_size);
+ y_plane_intrm = buffer_intrm.get();
+ for (int i = 0; i < kCompressBatchSize; ++i) {
+ y_intrm[i] = y_plane_intrm + i * aligned_width;
+ }
+ }
+
+ while (cinfo->output_scanline < cinfo->image_height) {
+ for (int i = 0; i < kCompressBatchSize; ++i) {
+ size_t scanline = cinfo->output_scanline + i;
+ if (scanline < cinfo->image_height) {
+ y[i] = y_plane + scanline * cinfo->image_width;
+ } else {
+ y[i] = empty.get();
+ }
+ }
+
+ int processed = jpeg_read_raw_data(cinfo, is_width_aligned ? planes : planes_intrm,
+ kCompressBatchSize);
+ if (processed != kCompressBatchSize / 2) {
+ ALOGE("Number of processed lines does not equal input lines.");
+ return false;
+ }
+ if (!is_width_aligned) {
+ for (int i = 0; i < kCompressBatchSize; ++i) {
+ memcpy(y[i], y_intrm[i], cinfo->image_width);
+ }
+ }
+ }
+ return true;
+}
+
+} // namespace ultrahdr
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