test/y4m_video_source.h

   1 /*
   2  * Copyright (c) 2016, Alliance for Open Media. All rights reserved
   3  *
   4  * This source code is subject to the terms of the BSD 2 Clause License and
   5  * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
   6  * was not distributed with this source code in the LICENSE file, you can
   7  * obtain it at www.aomedia.org/license/software. If the Alliance for Open
   8  * Media Patent License 1.0 was not distributed with this source code in the
   9  * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
  10  */
  11 #ifndef TEST_Y4M_VIDEO_SOURCE_H_
  12 #define TEST_Y4M_VIDEO_SOURCE_H_
  13 #include <algorithm>
  14 #include <string>
  15
  16 #include "common/y4minput.h"
  17 #include "test/video_source.h"
  18
  19 namespace libaom_test {
  20
  21 // This class extends VideoSource to allow parsing of raw yv12
  22 // so that we can do actual file encodes.
  23 class Y4mVideoSource : public VideoSource {
  24  public:
  25   Y4mVideoSource(const std::string &file_name, unsigned int start, int limit)
  26       : file_name_(file_name), input_file_(NULL), img_(new aom_image_t()),
  27         start_(start), limit_(limit), frame_(0), framerate_numerator_(0),
  28         framerate_denominator_(0), y4m_() {}
  29
  30   virtual ~Y4mVideoSource() {
  31     aom_img_free(img_.get());
  32     CloseSource();
  33   }
  34
  35   virtual void OpenSource() {
  36     CloseSource();
  37     input_file_ = OpenTestDataFile(file_name_);
  38     ASSERT_TRUE(input_file_ != NULL)
  39         << "Input file open failed. Filename: " << file_name_;
  40   }
  41
  42   virtual void ReadSourceToStart() {
  43     ASSERT_TRUE(input_file_ != NULL);
  44     ASSERT_FALSE(y4m_input_open(&y4m_, input_file_, NULL, 0, 0));
  45     framerate_numerator_ = y4m_.fps_n;
  46     framerate_denominator_ = y4m_.fps_d;
  47     frame_ = 0;
  48     for (unsigned int i = 0; i < start_; i++) {
  49       Next();
  50     }
  51     FillFrame();
  52   }
  53
  54   virtual void Begin() {
  55     OpenSource();
  56     ReadSourceToStart();
  57   }
  58
  59   virtual void Next() {
  60     ++frame_;
  61     FillFrame();
  62   }
  63
  64   virtual aom_image_t *img() const {
  65     return (frame_ < limit_) ? img_.get() : NULL;
  66   }
  67
  68   // Models a stream where Timebase = 1/FPS, so pts == frame.
  69   virtual aom_codec_pts_t pts() const { return frame_; }
  70
  71   virtual unsigned long duration() const { return 1; }
  72
  73   virtual aom_rational_t timebase() const {
  74     const aom_rational_t t = { framerate_denominator_, framerate_numerator_ };
  75     return t;
  76   }
  77
  78   virtual unsigned int frame() const { return frame_; }
  79
  80   virtual unsigned int limit() const { return limit_; }
  81
  82   virtual void FillFrame() {
  83     ASSERT_TRUE(input_file_ != NULL);
  84     // Read a frame from input_file.
  85     y4m_input_fetch_frame(&y4m_, input_file_, img_.get());
  86   }
  87
  88   // Swap buffers with another y4m source. This allows reading a new frame
  89   // while keeping the old frame around. A whole Y4mSource is required and
  90   // not just a aom_image_t because of how the y4m reader manipulates
  91   // aom_image_t internals,
  92   void SwapBuffers(Y4mVideoSource *other) {
  93     std::swap(other->y4m_.dst_buf, y4m_.dst_buf);
  94     aom_image_t *tmp;
  95     tmp = other->img_.release();
  96     other->img_.reset(img_.release());
  97     img_.reset(tmp);
  98   }
  99
 100  protected:
 101   void CloseSource() {
 102     y4m_input_close(&y4m_);
 103     y4m_ = y4m_input();
 104     if (input_file_ != NULL) {
 105       fclose(input_file_);
 106       input_file_ = NULL;
 107     }
 108   }
 109
 110   std::string file_name_;
 111   FILE *input_file_;
 112   testing::internal::scoped_ptr<aom_image_t> img_;
 113   unsigned int start_;
 114   unsigned int limit_;
 115   unsigned int frame_;
 116   int framerate_numerator_;
 117   int framerate_denominator_;
 118   y4m_input y4m_;
 119 };
 120
 121 }  // namespace libaom_test
 122
 123 #endif  // TEST_Y4M_VIDEO_SOURCE_H_