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/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
#ifndef AOM_TEST_Y4M_VIDEO_SOURCE_H_
#define AOM_TEST_Y4M_VIDEO_SOURCE_H_
#include <algorithm>
#include <memory>
#include <string>
#include "common/y4minput.h"
#include "test/video_source.h"
namespace libaom_test {
// This class extends VideoSource to allow parsing of raw yv12
// so that we can do actual file encodes.
class Y4mVideoSource : public VideoSource {
public:
Y4mVideoSource(const std::string &file_name, unsigned int start, int limit)
: file_name_(file_name), input_file_(nullptr), img_(new aom_image_t()),
start_(start), limit_(limit), frame_(0), framerate_numerator_(0),
framerate_denominator_(0), y4m_() {}
~Y4mVideoSource() override {
aom_img_free(img_.get());
CloseSource();
}
virtual void OpenSource() {
CloseSource();
input_file_ = OpenTestDataFile(file_name_);
ASSERT_NE(input_file_, nullptr)
<< "Input file open failed. Filename: " << file_name_;
}
virtual void ReadSourceToStart() {
ASSERT_NE(input_file_, nullptr);
ASSERT_FALSE(
y4m_input_open(&y4m_, input_file_, nullptr, 0, AOM_CSP_UNKNOWN, 0));
framerate_numerator_ = y4m_.fps_n;
framerate_denominator_ = y4m_.fps_d;
frame_ = 0;
for (unsigned int i = 0; i < start_; i++) {
Next();
}
FillFrame();
}
void Begin() override {
OpenSource();
ReadSourceToStart();
}
void Next() override {
++frame_;
FillFrame();
}
aom_image_t *img() const override {
return (frame_ < limit_) ? img_.get() : nullptr;
}
// Models a stream where Timebase = 1/FPS, so pts == frame.
aom_codec_pts_t pts() const override { return frame_; }
unsigned long duration() const override { return 1; }
aom_rational_t timebase() const override {
const aom_rational_t t = { framerate_denominator_, framerate_numerator_ };
return t;
}
unsigned int frame() const override { return frame_; }
unsigned int limit() const override { return limit_; }
virtual void FillFrame() {
ASSERT_NE(input_file_, nullptr);
// Read a frame from input_file.
y4m_input_fetch_frame(&y4m_, input_file_, img_.get());
}
// Swap buffers with another y4m source. This allows reading a new frame
// while keeping the old frame around. A whole Y4mSource is required and
// not just a aom_image_t because of how the y4m reader manipulates
// aom_image_t internals,
void SwapBuffers(Y4mVideoSource *other) {
std::swap(other->y4m_.dst_buf, y4m_.dst_buf);
aom_image_t *tmp;
tmp = other->img_.release();
other->img_.reset(img_.release());
img_.reset(tmp);
}
protected:
void CloseSource() {
y4m_input_close(&y4m_);
y4m_ = y4m_input();
if (input_file_ != nullptr) {
fclose(input_file_);
input_file_ = nullptr;
}
}
std::string file_name_;
FILE *input_file_;
std::unique_ptr<aom_image_t> img_;
unsigned int start_;
unsigned int limit_;
unsigned int frame_;
int framerate_numerator_;
int framerate_denominator_;
y4m_input y4m_;
};
} // namespace libaom_test
#endif // AOM_TEST_Y4M_VIDEO_SOURCE_H_
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