libs/jpegrecoverymap/jpegdecoder.cpp - android_frameworks_native - Gitiles

 /*
  * 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 <jpegrecoverymap/jpegdecoder.h>

 #include <cutils/log.h>

 #include <errno.h>
 #include <setjmp.h>

 namespace android::recoverymap {
 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);
 }

 JpegDecoder::JpegDecoder() {
 }

 JpegDecoder::~JpegDecoder() {
 }

 bool JpegDecoder::decompressImage(const void* image, int length) {
     if (image == nullptr || length <= 0) {
         ALOGE("Image size can not be handled: %d", length);
         return false;
     }

     mResultBuffer.clear();
     if (!decode(image, length)) {
         return false;
     }

     return true;
 }

 void* JpegDecoder::getDecompressedImagePtr() {
     return mResultBuffer.data();
 }

 size_t JpegDecoder::getDecompressedImageSize() {
     return mResultBuffer.size();
 }

 size_t JpegDecoder::getDecompressedImageWidth() {
     return mWidth;
 }

 size_t JpegDecoder::getDecompressedImageHeight() {
     return mHeight;
 }

 bool JpegDecoder::decode(const void* image, int length) {
     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);

     cinfo.src = &mgr;
     jpeg_read_header(&cinfo, TRUE);

     mWidth = cinfo.image_width;
     mHeight = cinfo.image_height;

     if (cinfo.jpeg_color_space == JCS_YCbCr) {
         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.raw_data_out = TRUE;
     cinfo.dct_method = JDCT_IFAST;
     cinfo.out_color_space = cinfo.jpeg_color_space;

     jpeg_start_decompress(&cinfo);

     if (!decompress(&cinfo, static_cast<const uint8_t*>(mResultBuffer.data()),
             cinfo.jpeg_color_space == JCS_GRAYSCALE)) {
         return false;
     }

     jpeg_finish_decompress(&cinfo);
     jpeg_destroy_decompress(&cinfo);

     return true;
 }

 bool JpegDecoder::decompress(jpeg_decompress_struct* cinfo, const uint8_t* dest,
         bool isSingleChannel) {
     if (isSingleChannel) {
         return decompressSingleChannel(cinfo, dest);
     }
     return decompressYUV(cinfo, dest);
 }

 bool JpegDecoder::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(new uint8_t[cinfo->image_width]);
     memset(empty.get(), 0, cinfo->image_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();
             }
         }
         // 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, planes, kCompressBatchSize);
         if (processed != kCompressBatchSize) {
             ALOGE("Number of processed lines does not equal input lines.");
             return false;
         }
     }
     return true;
 }

 bool JpegDecoder::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(new uint8_t[cinfo->image_width]);
     memset(empty.get(), 0, cinfo->image_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, planes, kCompressBatchSize);
         if (processed != kCompressBatchSize / 2) {
             ALOGE("Number of processed lines does not equal input lines.");
             return false;
         }
     }
     return true;
 }

 } // namespace android
	/*
	* 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 <jpegrecoverymap/jpegdecoder.h>

	#include <cutils/log.h>

	#include <errno.h>
	#include <setjmp.h>

	namespace android::recoverymap {
	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);
	}

	JpegDecoder::JpegDecoder() {
	}

	JpegDecoder::~JpegDecoder() {
	}

	bool JpegDecoder::decompressImage(const void* image, int length) {
	if (image == nullptr \|\| length <= 0) {
	ALOGE("Image size can not be handled: %d", length);
	return false;
	}

	mResultBuffer.clear();
	if (!decode(image, length)) {
	return false;
	}

	return true;
	}

	void* JpegDecoder::getDecompressedImagePtr() {
	return mResultBuffer.data();
	}

	size_t JpegDecoder::getDecompressedImageSize() {
	return mResultBuffer.size();
	}

	size_t JpegDecoder::getDecompressedImageWidth() {
	return mWidth;
	}

	size_t JpegDecoder::getDecompressedImageHeight() {
	return mHeight;
	}

	bool JpegDecoder::decode(const void* image, int length) {
	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);

	cinfo.src = &mgr;
	jpeg_read_header(&cinfo, TRUE);

	mWidth = cinfo.image_width;
	mHeight = cinfo.image_height;

	if (cinfo.jpeg_color_space == JCS_YCbCr) {
	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.raw_data_out = TRUE;
	cinfo.dct_method = JDCT_IFAST;
	cinfo.out_color_space = cinfo.jpeg_color_space;

	jpeg_start_decompress(&cinfo);

	if (!decompress(&cinfo, static_cast<const uint8_t*>(mResultBuffer.data()),
	cinfo.jpeg_color_space == JCS_GRAYSCALE)) {
	return false;
	}

	jpeg_finish_decompress(&cinfo);
	jpeg_destroy_decompress(&cinfo);

	return true;
	}

	bool JpegDecoder::decompress(jpeg_decompress_struct* cinfo, const uint8_t* dest,
	bool isSingleChannel) {
	if (isSingleChannel) {
	return decompressSingleChannel(cinfo, dest);
	}
	return decompressYUV(cinfo, dest);
	}

	bool JpegDecoder::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(new uint8_t[cinfo->image_width]);
	memset(empty.get(), 0, cinfo->image_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();
	}
	}
	// 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, planes, kCompressBatchSize);
	if (processed != kCompressBatchSize) {
	ALOGE("Number of processed lines does not equal input lines.");
	return false;
	}
	}
	return true;
	}

	bool JpegDecoder::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(new uint8_t[cinfo->image_width]);
	memset(empty.get(), 0, cinfo->image_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, planes, kCompressBatchSize);
	if (processed != kCompressBatchSize / 2) {
	ALOGE("Number of processed lines does not equal input lines.");
	return false;
	}
	}
	return true;
	}

	} // namespace android