src/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_(num_configs),
  38       num_buffers_in_one_config_(num_buffers_in_one_config),
  39       config_changes_(num_configs > 1),
  40       is_encrypted_(is_encrypted),
  41       read_to_hold_(-1) {
  42   DCHECK_GT(num_configs, 0);
  43   DCHECK_GT(num_buffers_in_one_config, 0);
  44   Initialize();
  45   UpdateVideoDecoderConfig();
  46 }
  47
  48 FakeDemuxerStream::~FakeDemuxerStream() {}
  49
  50 void FakeDemuxerStream::Initialize() {
  51   DCHECK_EQ(-1, read_to_hold_);
  52   num_configs_left_ = num_configs_;
  53   num_buffers_left_in_current_config_ = num_buffers_in_one_config_;
  54   num_buffers_returned_ = 0;
  55   current_timestamp_ = base::TimeDelta::FromMilliseconds(kStartTimestampMs);
  56   duration_ = base::TimeDelta::FromMilliseconds(kDurationMs);
  57   splice_timestamp_ = kNoTimestamp();
  58   next_coded_size_ = gfx::Size(kStartWidth, kStartHeight);
  59   next_read_num_ = 0;
  60 }
  61
  62 void FakeDemuxerStream::Read(const ReadCB& read_cb) {
  63   DCHECK(task_runner_->BelongsToCurrentThread());
  64   DCHECK(read_cb_.is_null());
  65
  66   read_cb_ = BindToCurrentLoop(read_cb);
  67
  68   if (read_to_hold_ == next_read_num_)
  69     return;
  70
  71   DCHECK(read_to_hold_ == -1 || read_to_hold_ > next_read_num_);
  72   DoRead();
  73 }
  74
  75 AudioDecoderConfig FakeDemuxerStream::audio_decoder_config() {
  76   DCHECK(task_runner_->BelongsToCurrentThread());
  77   NOTREACHED();
  78   return AudioDecoderConfig();
  79 }
  80
  81 VideoDecoderConfig FakeDemuxerStream::video_decoder_config() {
  82   DCHECK(task_runner_->BelongsToCurrentThread());
  83   return video_decoder_config_;
  84 }
  85
  86 // TODO(xhwang): Support audio if needed.
  87 DemuxerStream::Type FakeDemuxerStream::type() {
  88   DCHECK(task_runner_->BelongsToCurrentThread());
  89   return VIDEO;
  90 }
  91
  92 bool FakeDemuxerStream::SupportsConfigChanges() {
  93   return config_changes_;
  94 }
  95
  96 VideoRotation FakeDemuxerStream::video_rotation() {
  97   return VIDEO_ROTATION_0;
  98 }
  99
 100 void FakeDemuxerStream::HoldNextRead() {
 101   DCHECK(task_runner_->BelongsToCurrentThread());
 102   read_to_hold_ = next_read_num_;
 103 }
 104
 105 void FakeDemuxerStream::HoldNextConfigChangeRead() {
 106   DCHECK(task_runner_->BelongsToCurrentThread());
 107   // Set |read_to_hold_| to be the next config change read.
 108   read_to_hold_ = next_read_num_ + num_buffers_in_one_config_ -
 109                   next_read_num_ % (num_buffers_in_one_config_ + 1);
 110 }
 111
 112 void FakeDemuxerStream::SatisfyRead() {
 113   DCHECK(task_runner_->BelongsToCurrentThread());
 114   DCHECK_EQ(read_to_hold_, next_read_num_);
 115   DCHECK(!read_cb_.is_null());
 116
 117   read_to_hold_ = -1;
 118   DoRead();
 119 }
 120
 121 void FakeDemuxerStream::SatisfyReadAndHoldNext() {
 122   DCHECK(task_runner_->BelongsToCurrentThread());
 123   DCHECK_EQ(read_to_hold_, next_read_num_);
 124   DCHECK(!read_cb_.is_null());
 125
 126   ++read_to_hold_;
 127   DoRead();
 128 }
 129
 130 void FakeDemuxerStream::Reset() {
 131   read_to_hold_ = -1;
 132
 133   if (!read_cb_.is_null())
 134     base::ResetAndReturn(&read_cb_).Run(kAborted, NULL);
 135 }
 136
 137 void FakeDemuxerStream::SeekToStart() {
 138   Reset();
 139   Initialize();
 140 }
 141
 142 void FakeDemuxerStream::UpdateVideoDecoderConfig() {
 143   const gfx::Rect kVisibleRect(kStartWidth, kStartHeight);
 144   video_decoder_config_.Initialize(
 145       kCodecVP8, VIDEO_CODEC_PROFILE_UNKNOWN, VideoFrame::YV12,
 146       next_coded_size_, kVisibleRect, next_coded_size_,
 147       NULL, 0, is_encrypted_, false);
 148   next_coded_size_.Enlarge(kWidthDelta, kHeightDelta);
 149 }
 150
 151 void FakeDemuxerStream::DoRead() {
 152   DCHECK(task_runner_->BelongsToCurrentThread());
 153   DCHECK(!read_cb_.is_null());
 154
 155   next_read_num_++;
 156
 157   if (num_buffers_left_in_current_config_ == 0) {
 158     // End of stream.
 159     if (num_configs_left_ == 0) {
 160       base::ResetAndReturn(&read_cb_).Run(kOk,
 161                                           DecoderBuffer::CreateEOSBuffer());
 162       return;
 163     }
 164
 165     // Config change.
 166     num_buffers_left_in_current_config_ = num_buffers_in_one_config_;
 167     UpdateVideoDecoderConfig();
 168     base::ResetAndReturn(&read_cb_).Run(kConfigChanged, NULL);
 169     return;
 170   }
 171
 172   scoped_refptr<DecoderBuffer> buffer = CreateFakeVideoBufferForTest(
 173       video_decoder_config_, current_timestamp_, duration_);
 174
 175   // TODO(xhwang): Output out-of-order buffers if needed.
 176   if (is_encrypted_) {
 177     buffer->set_decrypt_config(scoped_ptr<DecryptConfig>(
 178         new DecryptConfig(std::string(kKeyId, kKeyId + arraysize(kKeyId)),
 179                           std::string(kIv, kIv + arraysize(kIv)),
 180                           std::vector<SubsampleEntry>())));
 181   }
 182   buffer->set_timestamp(current_timestamp_);
 183   buffer->set_duration(duration_);
 184   buffer->set_splice_timestamp(splice_timestamp_);
 185   current_timestamp_ += duration_;
 186
 187   num_buffers_left_in_current_config_--;
 188   if (num_buffers_left_in_current_config_ == 0)
 189     num_configs_left_--;
 190
 191   num_buffers_returned_++;
 192   base::ResetAndReturn(&read_cb_).Run(kOk, buffer);
 193 }
 194
 195 }  // namespace media