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/*
* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <stdio.h>
#include "common_video/libyuv/include/webrtc_libyuv.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"
#include "test/testsupport/frame_writer.h"
extern "C" {
#if defined(USE_SYSTEM_LIBJPEG)
#include <jpeglib.h>
#else
// Include directory supplied by gn
#include "jpeglib.h" // NOLINT
#endif
}
namespace webrtc {
namespace test {
JpegFrameWriter::JpegFrameWriter(const std::string& output_filename)
: frame_written_(false),
output_filename_(output_filename),
output_file_(nullptr) {}
bool JpegFrameWriter::WriteFrame(const VideoFrame& input_frame, int quality) {
if (frame_written_) {
RTC_LOG(LS_ERROR) << "Only a single frame can be saved to Jpeg.";
return false;
}
const int kColorPlanes = 3; // R, G and B.
size_t rgb_len = input_frame.height() * input_frame.width() * kColorPlanes;
std::unique_ptr<uint8_t[]> rgb_buf(new uint8_t[rgb_len]);
// kRGB24 actually corresponds to FourCC 24BG which is 24-bit BGR.
if (ConvertFromI420(input_frame, VideoType::kRGB24, 0, rgb_buf.get()) < 0) {
RTC_LOG(LS_ERROR) << "Could not convert input frame to RGB.";
return false;
}
output_file_ = fopen(output_filename_.c_str(), "wb");
if (!output_file_) {
RTC_LOG(LS_ERROR) << "Couldn't open file to write jpeg frame to:"
<< output_filename_;
return false;
}
// Invoking LIBJPEG
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
JSAMPROW row_pointer[1];
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
jpeg_stdio_dest(&cinfo, output_file_);
cinfo.image_width = input_frame.width();
cinfo.image_height = input_frame.height();
cinfo.input_components = kColorPlanes;
cinfo.in_color_space = JCS_EXT_BGR;
jpeg_set_defaults(&cinfo);
jpeg_set_quality(&cinfo, quality, TRUE);
jpeg_start_compress(&cinfo, TRUE);
int row_stride = input_frame.width() * kColorPlanes;
while (cinfo.next_scanline < cinfo.image_height) {
row_pointer[0] = &rgb_buf.get()[cinfo.next_scanline * row_stride];
jpeg_write_scanlines(&cinfo, row_pointer, 1);
}
jpeg_finish_compress(&cinfo);
jpeg_destroy_compress(&cinfo);
fclose(output_file_);
frame_written_ = true;
return true;
}
} // namespace test
} // namespace webrtc
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