Allow muting/unmuting audio through media track API

media/test/pipeline_integration_test.cc

Index: media/test/pipeline_integration_test.cc
diff --git a/media/test/pipeline_integration_test.cc b/media/test/pipeline_integration_test.cc
index ea8cd6e8c0c97eefdad2279f2c2917ed69362621..962bf45eebc02a512ede13b1831c7bdb76b0333d 100644
--- a/media/test/pipeline_integration_test.cc
+++ b/media/test/pipeline_integration_test.cc
@@ -617,7 +617,7 @@ class MockMediaSource {
 
     CHECK_EQ(chunk_demuxer_->AddId(kSourceId, type, codecs), ChunkDemuxer::kOk);
     chunk_demuxer_->SetTracksWatcher(
-        kSourceId, base::Bind(&MockMediaSource::InitSegmentReceivedWrapper,
+        kSourceId, base::Bind(&MockMediaSource::InitSegmentReceived,
                               base::Unretained(this)));
 
     AppendData(initial_append_size_);
@@ -634,12 +634,18 @@ class MockMediaSource {
     return last_timestamp_offset_;
   }
 
-  // A workaround for gtest mocks not allowing moving scoped_ptrs.
-  void InitSegmentReceivedWrapper(scoped_ptr<MediaTracks> tracks) {
-    InitSegmentReceived(tracks);
+  void InitSegmentReceived(scoped_ptr<MediaTracks> tracks) {
+    CHECK(tracks.get());
+    EXPECT_GT(tracks->tracks().size(), 0u);
+    media_tracks_ = std::move(tracks);
+    CHECK(chunk_demuxer_);
+    static unsigned track_id = 0;
+    for (const auto& track : media_tracks_->tracks()) {
+      chunk_demuxer_->OnTrackIdAssigned(++track_id, track.get());
+    }
   }
 
-  MOCK_METHOD1(InitSegmentReceived, void(scoped_ptr<MediaTracks>&));
+  const MediaTracks* GetMediaTracks() const { return media_tracks_.get(); }
 
  private:
   scoped_refptr<DecoderBuffer> file_data_;
@@ -648,6 +654,7 @@ class MockMediaSource {
   std::string mimetype_;
   ChunkDemuxer* chunk_demuxer_;
   scoped_ptr<Demuxer> owned_chunk_demuxer_;
+  scoped_ptr<MediaTracks> media_tracks_;
   Demuxer::EncryptedMediaInitDataCB encrypted_media_init_data_cb_;
   base::TimeDelta last_timestamp_offset_;
 };
@@ -693,7 +700,6 @@ class PipelineIntegrationTest : public PipelineIntegrationTestHost {
     hashing_enabled_ = test_type & kHashed;
     clockless_playback_ = test_type & kClockless;
 
-    EXPECT_CALL(*source, InitSegmentReceived(_)).Times(AtLeast(1));
     EXPECT_CALL(*this, OnMetadata(_))
         .Times(AtMost(1))
         .WillRepeatedly(SaveArg<0>(&metadata_));
@@ -722,12 +728,23 @@ class PipelineIntegrationTest : public PipelineIntegrationTestHost {
                    base::Unretained(this)));
     message_loop_.Run();
     EXPECT_EQ(PIPELINE_OK, pipeline_status_);
+    EXPECT_GT(source->GetMediaTracks()->tracks().size(), 0u);
     return pipeline_status_;
   }
 
+  void StartHashedPipelineWithMediaSource(MockMediaSource* source) {
+    hashing_enabled_ = true;
+    StartPipelineWithMediaSource(source);
+  }
+
+  void StartHashedClocklessPipelineWithMediaSource(MockMediaSource* source) {
+    hashing_enabled_ = true;
+    clockless_playback_ = true;
+    StartPipelineWithMediaSource(source);
+  }
+
   void StartPipelineWithEncryptedMedia(MockMediaSource* source,
                                        FakeEncryptedMedia* encrypted_media) {
-    EXPECT_CALL(*source, InitSegmentReceived(_)).Times(AtLeast(1));
     EXPECT_CALL(*this, OnMetadata(_))
         .Times(AtMost(1))
         .WillRepeatedly(SaveArg<0>(&metadata_));
@@ -768,6 +785,7 @@ class PipelineIntegrationTest : public PipelineIntegrationTestHost {
 
     message_loop_.Run();
     EXPECT_EQ(PIPELINE_OK, pipeline_status_);
+    EXPECT_GT(source->GetMediaTracks()->tracks().size(), 0u);
   }
 
   // Verifies that seeking works properly for ChunkDemuxer when the
@@ -2135,4 +2153,29 @@ TEST_F(PipelineIntegrationTest, BasicPlaybackPositiveStartTime) {
             demuxer_->GetStartTime());
 }
 
+TEST_F(PipelineIntegrationTest, AudioTrackMuteUnmute) {
+  ASSERT_EQ(PIPELINE_OK, Start("bear-320x240.webm"));
+
+  // Start playback and play a little, to ensure demuxer streams are created.
+  Play();
+  ASSERT_TRUE(
+      WaitUntilCurrentTimeIsAfter(base::TimeDelta::FromMilliseconds(500)));
+  Pause();
+
+  const DemuxerStream* demux_stream = demuxer_->GetDemuxerStreamByTrackId(2);
+  EXPECT_NE(demux_stream, nullptr);
+  EXPECT_EQ(demux_stream->type(), DemuxerStream::AUDIO);
+
+  // TODO(servolk): Find a way to verify that audio is really muted/unmuted.
+  // This should mute the audio stream.
+  std::vector<const DemuxerStream*> enabledAudioStreams;
+  pipeline_->OnEnabledAudioStreamsChanged(enabledAudioStreams);
+  // This should unmute the audio stream.
+  enabledAudioStreams.push_back(demux_stream);
+  pipeline_->OnEnabledAudioStreamsChanged(enabledAudioStreams);
+
+  Play();
+  ASSERT_TRUE(WaitUntilOnEnded());
+}
+
 }  // namespace media