media/filters/fake_demuxer_stream.cc

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "media/filters/fake_demuxer_stream.h"
   6
   7 #include "base/bind.h"
   8 #include "base/callback_helpers.h"
   9 #include "base/location.h"
  10 #include "base/logging.h"
  11 #include "base/message_loop/message_loop_proxy.h"
  12 #include "media/base/bind_to_current_loop.h"
  13 #include "media/base/decoder_buffer.h"
  14 #include "media/base/test_helpers.h"
  15 #include "media/base/video_frame.h"
  16 #include "ui/gfx/rect.h"
  17 #include "ui/gfx/size.h"
  18
  19 namespace media {
  20
  21 const int kStartTimestampMs = 0;
  22 const int kDurationMs = 30;
  23 const int kStartWidth = 320;
  24 const int kStartHeight = 240;
  25 const int kWidthDelta = 4;
  26 const int kHeightDelta = 3;
  27 const uint8 kKeyId[] = { 0x00, 0x01, 0x02, 0x03 };
  28 const uint8 kIv[] = {
  29   0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
  30   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  31 };
  32
  33 FakeDemuxerStream::FakeDemuxerStream(int num_configs,
  34                                      int num_buffers_in_one_config,
  35                                      bool is_encrypted)
  36     : task_runner_(base::MessageLoopProxy::current()),
  37       num_configs_left_(num_configs),
  38       num_buffers_in_one_config_(num_buffers_in_one_config),
  39       is_encrypted_(is_encrypted),
  40       num_buffers_left_in_current_config_(num_buffers_in_one_config),
  41       num_buffers_returned_(0),
  42       current_timestamp_(base::TimeDelta::FromMilliseconds(kStartTimestampMs)),
  43       duration_(base::TimeDelta::FromMilliseconds(kDurationMs)),
  44       next_coded_size_(kStartWidth, kStartHeight),
  45       next_read_num_(0),
  46       read_to_hold_(-1) {
  47   DCHECK_GT(num_configs_left_, 0);
  48   DCHECK_GT(num_buffers_in_one_config_, 0);
  49   UpdateVideoDecoderConfig();
  50 }
  51
  52 FakeDemuxerStream::~FakeDemuxerStream() {}
  53
  54 void FakeDemuxerStream::Read(const ReadCB& read_cb) {
  55   DCHECK(task_runner_->BelongsToCurrentThread());
  56   DCHECK(read_cb_.is_null());
  57
  58   read_cb_ = BindToCurrentLoop(read_cb);
  59
  60   if (read_to_hold_ == next_read_num_)
  61     return;
  62
  63   DCHECK(read_to_hold_ == -1 || read_to_hold_ > next_read_num_);
  64   DoRead();
  65 }
  66
  67 AudioDecoderConfig FakeDemuxerStream::audio_decoder_config() {
  68   DCHECK(task_runner_->BelongsToCurrentThread());
  69   NOTREACHED();
  70   return AudioDecoderConfig();
  71 }
  72
  73 VideoDecoderConfig FakeDemuxerStream::video_decoder_config() {
  74   DCHECK(task_runner_->BelongsToCurrentThread());
  75   return video_decoder_config_;
  76 }
  77
  78 // TODO(xhwang): Support audio if needed.
  79 DemuxerStream::Type FakeDemuxerStream::type() {
  80   DCHECK(task_runner_->BelongsToCurrentThread());
  81   return VIDEO;
  82 }
  83
  84 void FakeDemuxerStream::EnableBitstreamConverter() {
  85   DCHECK(task_runner_->BelongsToCurrentThread());
  86 }
  87
  88 void FakeDemuxerStream::HoldNextRead() {
  89   DCHECK(task_runner_->BelongsToCurrentThread());
  90   read_to_hold_ = next_read_num_;
  91 }
  92
  93 void FakeDemuxerStream::HoldNextConfigChangeRead() {
  94   DCHECK(task_runner_->BelongsToCurrentThread());
  95   // Set |read_to_hold_| to be the next config change read.
  96   read_to_hold_ = next_read_num_ + num_buffers_in_one_config_ -
  97                   next_read_num_ % (num_buffers_in_one_config_ + 1);
  98 }
  99
 100 void FakeDemuxerStream::SatisfyRead() {
 101   DCHECK(task_runner_->BelongsToCurrentThread());
 102   DCHECK_EQ(read_to_hold_, next_read_num_);
 103   DCHECK(!read_cb_.is_null());
 104
 105   read_to_hold_ = -1;
 106   DoRead();
 107 }
 108
 109 void FakeDemuxerStream::Reset() {
 110   read_to_hold_ = -1;
 111
 112   if (!read_cb_.is_null())
 113     base::ResetAndReturn(&read_cb_).Run(kAborted, NULL);
 114 }
 115
 116 void FakeDemuxerStream::UpdateVideoDecoderConfig() {
 117   const gfx::Rect kVisibleRect(kStartWidth, kStartHeight);
 118   video_decoder_config_.Initialize(
 119       kCodecVP8, VIDEO_CODEC_PROFILE_UNKNOWN, VideoFrame::YV12,
 120       next_coded_size_, kVisibleRect, next_coded_size_,
 121       NULL, 0, is_encrypted_, false);
 122   next_coded_size_.Enlarge(kWidthDelta, kHeightDelta);
 123 }
 124
 125 void FakeDemuxerStream::DoRead() {
 126   DCHECK(task_runner_->BelongsToCurrentThread());
 127   DCHECK(!read_cb_.is_null());
 128
 129   next_read_num_++;
 130
 131   if (num_buffers_left_in_current_config_ == 0) {
 132     // End of stream.
 133     if (num_configs_left_ == 0) {
 134       base::ResetAndReturn(&read_cb_).Run(kOk,
 135                                           DecoderBuffer::CreateEOSBuffer());
 136       return;
 137     }
 138
 139     // Config change.
 140     num_buffers_left_in_current_config_ = num_buffers_in_one_config_;
 141     UpdateVideoDecoderConfig();
 142     base::ResetAndReturn(&read_cb_).Run(kConfigChanged, NULL);
 143     return;
 144   }
 145
 146   scoped_refptr<DecoderBuffer> buffer = CreateFakeVideoBufferForTest(
 147       video_decoder_config_, current_timestamp_, duration_);
 148
 149   // TODO(xhwang): Output out-of-order buffers if needed.
 150   if (is_encrypted_) {
 151     buffer->set_decrypt_config(scoped_ptr<DecryptConfig>(
 152         new DecryptConfig(std::string(kKeyId, kKeyId + arraysize(kKeyId)),
 153                           std::string(kIv, kIv + arraysize(kIv)),
 154                           std::vector<SubsampleEntry>())));
 155   }
 156   buffer->set_timestamp(current_timestamp_);
 157   buffer->set_duration(duration_);
 158   current_timestamp_ += duration_;
 159
 160   num_buffers_left_in_current_config_--;
 161   if (num_buffers_left_in_current_config_ == 0)
 162     num_configs_left_--;
 163
 164   num_buffers_returned_++;
 165   base::ResetAndReturn(&read_cb_).Run(kOk, buffer);
 166 }
 167
 168 }  // namespace media