/*
* Copyright (c) 2012 The WebM 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.
*/
#ifndef VPX_TEST_Y4M_VIDEO_SOURCE_H_
#define VPX_TEST_Y4M_VIDEO_SOURCE_H_
#include <algorithm>
#include <memory>
#include <string>
#include "test/video_source.h"
#include "./y4minput.h"
namespace libvpx_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 vpx_image_t()),
start_(start), limit_(limit), frame_(0), framerate_numerator_(0),
framerate_denominator_(0), y4m_() {}
~Y4mVideoSource() override {
vpx_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, 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();
}
vpx_image_t *img()
const override {
return (frame_ < limit_) ? img_.get() : nullptr;
}
// Models a stream where Timebase = 1/FPS, so pts == frame.
vpx_codec_pts_t pts()
const override {
return frame_; }
unsigned long duration()
const override {
return 1; }
vpx_rational_t timebase()
const override {
const vpx_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 vpx_image_t because of how the y4m reader manipulates
// vpx_image_t internals,
void SwapBuffers(Y4mVideoSource *other) {
std::swap(other->y4m_.dst_buf, y4m_.dst_buf);
vpx_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<vpx_image_t> img_;
unsigned int start_;
unsigned int limit_;
unsigned int frame_;
int framerate_numerator_;
int framerate_denominator_;
y4m_input y4m_;
};
}
// namespace libvpx_test
#endif // VPX_TEST_Y4M_VIDEO_SOURCE_H_
