Add chromium support for MediaStreamAudioDestinationNode

content/renderer/media/media_stream_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/media/media_stream_impl.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "base/string_number_conversions.h"
@@ skipping 52 matching lines @@
           kMediaStreamSourceTab) {
     options->video_type = content::MEDIA_TAB_VIDEO_CAPTURE;
     options->video_device_id = GetMandatoryStreamConstraint(
         user_media_request.videoConstraints(),
         kMediaStreamSourceId);
   }
 }
 
 // Get session ID for the selected microphone to ensure that we start
 // capturing audio using the correct input device.
-static int GetSessionId(const WebKit::WebMediaStreamDescriptor& descriptor) {
-  WebKit::WebVector<WebKit::WebMediaStreamComponent> audio_components;
-  descriptor.audioSources(audio_components);
-  if (audio_components.size() != 1) {
-    // TODO(henrika): add support for more than one audio track.
-    NOTIMPLEMENTED();
-    return -1;
-  }
-
-  if (!audio_components[0].isEnabled()) {
-    DVLOG(1) << "audio track is disabled";
-    return -1;
-  }
-
-  const WebKit::WebMediaStreamSource& source = audio_components[0].source();
+static int GetSessionId(const WebKit::WebMediaStreamSource& source) {
   MediaStreamSourceExtraData* source_data =
       static_cast<MediaStreamSourceExtraData*>(source.extraData());
   if (!source_data) {
     // TODO(henrika): Implement support for sources from remote MediaStreams.
     NOTIMPLEMENTED();
     return -1;
   }
   DVLOG(1) << "local audio track source name: "
            << source_data->device_info().device.name;
 
@@ skipping 217 matching lines @@
         dependency_factory_->GetWebRtcAudioDevice()->SetRenderer(renderer)) {
       return renderer;
     }
 
     // WebRtcAudioDeviceImpl can only support one renderer.
     return NULL;
   } else if (extra_data->local_stream()) {
     DVLOG(1) << "creating local audio renderer for stream:"
              << extra_data->local_stream()->label();
 
-    // Get session ID for the local media stream.
-    int session_id = GetSessionId(descriptor);
-    if (session_id == -1)
+    WebKit::WebVector<WebKit::WebMediaStreamComponent> audio_components;
+    descriptor.audioSources(audio_components);
+    if (audio_components.size() != 1) {
+      // TODO(henrika): add support for more than one audio track.
+      LOG(WARNING) << "Multiple MediaStream audio tracks not supported";
       return NULL;
+    }
+
+    if (!audio_components[0].isEnabled()) {
+      DVLOG(1) << "audio track is disabled";
+      return NULL;
+    }
+
+    int session_id = 0;
+    const WebKit::WebMediaStreamSource& source = audio_components[0].source();
+    if (!source.requiresAudioConsumer()) {
+      session_id = GetSessionId(source);
+      if (session_id == -1) {
+        return NULL;
+      }
+    } else {
+      DVLOG(1) << "WebAudio MediaStream is detected";
+      session_id = -1;
+    }
 
     // Create the local audio renderer using the specified session ID.
     scoped_refptr<WebRtcLocalAudioRenderer> local_renderer =
         CreateLocalAudioRenderer(session_id);
     return local_renderer;
   }
 
   NOTREACHED();
   return NULL;
 }
 
 // Callback from MediaStreamDispatcher.
 // The requested stream have been generated by the MediaStreamDispatcher.
 void MediaStreamImpl::OnStreamGenerated(
     int request_id,
     const std::string& label,
     const StreamDeviceInfoArray& audio_array,
     const StreamDeviceInfoArray& video_array) {
   DCHECK(CalledOnValidThread());
+  DVLOG(1) << "MediaStreamImpl::OnStreamGenerated("
+           << request_id << "," << label << ")";
 
   UserMediaRequestInfo* request_info = FindUserMediaRequestInfo(request_id);
   if (!request_info) {
     // This can happen if the request is canceled or the frame reloads while
     // MediaStreamDispatcher is processing the request.
     // We need to tell the dispatcher to stop the stream.
     media_stream_dispatcher_->StopStream(label);
     DVLOG(1) << "Request ID not found";
     return;
   }
@@ skipping 233 matching lines @@
     return NULL;
 
   DVLOG(1) << "MediaStreamImpl::CreateRemoteAudioRenderer label:"
            << stream->label();
 
   return new WebRtcAudioRenderer(RenderViewObserver::routing_id());
 }
 
 scoped_refptr<WebRtcLocalAudioRenderer>
 MediaStreamImpl::CreateLocalAudioRenderer(int session_id) {
-  DCHECK_NE(session_id, -1);
   // Ensure that the existing capturer reads data from the selected microphone.
   scoped_refptr<WebRtcAudioCapturer> source =
       dependency_factory_->GetWebRtcAudioDevice()->capturer();
   if (!source) {
     // The WebRtcAudioCapturer instance can be NULL e.g. if an unsupported
     // sample rate is used.
     // TODO(henrika): extend support of capture sample rates.
     return NULL;
   }
-  source->SetDevice(session_id);
+
+  if (session_id != -1)
+    source->SetDevice(session_id);
 
   // Create a new WebRtcLocalAudioRenderer instance and connect it to the
   // existing WebRtcAudioCapturer so that the renderer can use it as source.
   return new WebRtcLocalAudioRenderer(source, RenderViewObserver::routing_id());
 }
 
 MediaStreamSourceExtraData::MediaStreamSourceExtraData(
     const StreamDeviceInfo& device_info)
     : device_info_(device_info) {
 }
@@ skipping 17 matching lines @@
     const StreamStopCallback& stop_callback) {
   stream_stop_callback_ = stop_callback;
 }
 
 void MediaStreamExtraData::OnLocalStreamStop() {
   if (!stream_stop_callback_.is_null())
     stream_stop_callback_.Run(local_stream_->label());
 }
 
 }  // namespace content