src/content/renderer/media/media_stream_audio_source.cc

   1 // Copyright 2014 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 "content/renderer/media/media_stream_audio_source.h"
   6
   7 namespace content {
   8
   9 MediaStreamAudioSource::MediaStreamAudioSource(
  10     int render_view_id,
  11     const StreamDeviceInfo& device_info,
  12     const SourceStoppedCallback& stop_callback,
  13     MediaStreamDependencyFactory* factory)
  14     : render_view_id_(render_view_id),
  15       factory_(factory) {
  16   SetDeviceInfo(device_info);
  17   SetStopCallback(stop_callback);
  18 }
  19
  20 MediaStreamAudioSource::MediaStreamAudioSource()
  21     : render_view_id_(-1),
  22       factory_(NULL) {
  23 }
  24
  25 MediaStreamAudioSource::~MediaStreamAudioSource() {}
  26
  27 void MediaStreamAudioSource::DoStopSource() {
  28   if (audio_capturer_.get())
  29     audio_capturer_->Stop();
  30 }
  31
  32 void MediaStreamAudioSource::AddTrack(
  33     const blink::WebMediaStreamTrack& track,
  34     const blink::WebMediaConstraints& constraints,
  35     const ConstraintsCallback& callback) {
  36   // TODO(xians): Properly implement for audio sources.
  37   if (!local_audio_source_) {
  38     if (!factory_->InitializeMediaStreamAudioSource(render_view_id_,
  39                                                     constraints,
  40                                                     this)) {
  41       // The source failed to start.
  42       // MediaStreamImpl rely on the |stop_callback| to be triggered when the
  43       // last track is removed from the source. But in this case, the source is
  44       // is not even started. So we need to fail both adding the track and
  45       // trigger |stop_callback|.
  46       callback.Run(this, false);
  47       StopSource();
  48       return;
  49     }
  50   }
  51
  52   factory_->CreateLocalAudioTrack(track);
  53   callback.Run(this, true);
  54 }
  55
  56 }  // namespace content