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 #include "content/renderer/render_frame_impl.h"
   8 #include "content/renderer/render_view_impl.h"
   9
  10 namespace content {
  11
  12 namespace {
  13 // TODO(miu): This is a temporary hack until the Chrome audio vertical is
  14 // migrated for the Cross-Site Isolation project.  http://crbug.com/392596
  15 int ToRenderViewId(int render_frame_id) {
  16   RenderFrameImpl* const frame =
  17       RenderFrameImpl::FromRoutingID(render_frame_id);
  18   RenderViewImpl* const view = frame ? frame->render_view() : NULL;
  19   return view ? view->GetRoutingID() : -1;
  20 }
  21 }  // namespace
  22
  23 MediaStreamAudioSource::MediaStreamAudioSource(
  24     int render_frame_id,
  25     const StreamDeviceInfo& device_info,
  26     const SourceStoppedCallback& stop_callback,
  27     PeerConnectionDependencyFactory* factory)
  28     : render_view_id_(ToRenderViewId(render_frame_id)),
  29       factory_(factory) {
  30   SetDeviceInfo(device_info);
  31   SetStopCallback(stop_callback);
  32 }
  33
  34 MediaStreamAudioSource::MediaStreamAudioSource()
  35     : render_view_id_(-1),
  36       factory_(NULL) {
  37 }
  38
  39 MediaStreamAudioSource::~MediaStreamAudioSource() {}
  40
  41 void MediaStreamAudioSource::DoStopSource() {
  42   if (audio_capturer_.get())
  43     audio_capturer_->Stop();
  44 }
  45
  46 void MediaStreamAudioSource::AddTrack(
  47     const blink::WebMediaStreamTrack& track,
  48     const blink::WebMediaConstraints& constraints,
  49     const ConstraintsCallback& callback) {
  50   // TODO(xians): Properly implement for audio sources.
  51   if (!local_audio_source_) {
  52     if (!factory_->InitializeMediaStreamAudioSource(render_view_id_,
  53                                                     constraints,
  54                                                     this)) {
  55       // The source failed to start.
  56       // MediaStreamImpl rely on the |stop_callback| to be triggered when the
  57       // last track is removed from the source. But in this case, the source is
  58       // is not even started. So we need to fail both adding the track and
  59       // trigger |stop_callback|.
  60       callback.Run(this, MEDIA_DEVICE_TRACK_START_FAILURE, "");
  61       StopSource();
  62       return;
  63     }
  64   }
  65
  66   factory_->CreateLocalAudioTrack(track);
  67   callback.Run(this, MEDIA_DEVICE_OK, "");
  68 }
  69
  70 }  // namespace content