/* *  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_(NULL), img_(new vpx_image_t()),        start_(start), limit_(limit), frame_(0), framerate_numerator_(0),        framerate_denominator_(0), y4m_() {}   virtual ~Y4mVideoSource() {    vpx_img_free(img_.get());    CloseSource();  }   virtual void OpenSource() {    CloseSource();    input_file_ = OpenTestDataFile(file_name_);    ASSERT_TRUE(input_file_ != NULL)        << "Input file open failed. Filename: " << file_name_;  }   virtual void ReadSourceToStart() {    ASSERT_TRUE(input_file_ != NULL);    ASSERT_FALSE(y4m_input_open(&y4m_, input_file_, NULL, 0, 0));    framerate_numerator_ = y4m_.fps_n;    framerate_denominator_ = y4m_.fps_d;    frame_ = 0;    for (unsigned int i = 0; i < start_; i++) {      Next();    }    FillFrame();  }   virtual void Begin() {    OpenSource();    ReadSourceToStart();  }   virtual void Next() {    ++frame_;    FillFrame();  }   virtual vpx_image_t *img() const {    return (frame_ < limit_) ? img_.get() : NULL;  }   // Models a stream where Timebase = 1/FPS, so pts == frame.  virtual vpx_codec_pts_t pts() const { return frame_; }   virtual unsigned long duration() const { return 1; }   virtual vpx_rational_t timebase() const {    const vpx_rational_t t = { framerate_denominator_, framerate_numerator_ };    return t;  }   virtual unsigned int frame() const { return frame_; }   virtual unsigned int limit() const { return limit_; }   virtual void FillFrame() {    ASSERT_TRUE(input_file_ != NULL);    // 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_ != NULL) {      fclose(input_file_);      input_file_ = NULL;    }  }   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_