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      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_.get()) {
     52     if (!factory_->InitializeMediaStreamAudioSource(render_view_id_,
     53                                                     constraints,
     54                                                     this)) {
     55       // The source failed to start.
     56       // UserMediaClientImpl rely on the |stop_callback| to be triggered when
     57       // the last track is removed from the source. But in this case, the
     58       // source is is not even started. So we need to fail both adding the
     59       // track and 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
     71