y4m_video_source.h

/*
 *  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 TEST_Y4M_VIDEO_SOURCE_H_
#define TEST_Y4M_VIDEO_SOURCE_H_
#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 Begin() {
    CloseSource();
    input_file_ = OpenTestDataFile(file_name_);
    ASSERT_TRUE(input_file_ != NULL) << "Input file open failed. Filename: "
        << file_name_;

    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 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_; }