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