MediaCaptureFromElement: add support for audio captureStream().

content/renderer/renderer_blink_platform_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/renderer_blink_platform_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
+#include "base/guid.h"
 #include "base/lazy_instance.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/shared_memory.h"
 #include "base/metrics/histogram.h"
 #include "base/numerics/safe_conversions.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 33 matching lines @@
 #include "content/renderer/device_sensors/device_light_event_pump.h"
 #include "content/renderer/device_sensors/device_motion_event_pump.h"
 #include "content/renderer/device_sensors/device_orientation_absolute_event_pump.h"
 #include "content/renderer/device_sensors/device_orientation_event_pump.h"
 #include "content/renderer/dom_storage/local_storage_cached_areas.h"
 #include "content/renderer/dom_storage/local_storage_namespace.h"
 #include "content/renderer/dom_storage/webstoragenamespace_impl.h"
 #include "content/renderer/gamepad_shared_memory_reader.h"
 #include "content/renderer/media/audio_decoder.h"
 #include "content/renderer/media/canvas_capture_handler.h"
+#include "content/renderer/media/html_audio_element_capturer_source.h"
 #include "content/renderer/media/html_video_element_capturer_source.h"
 #include "content/renderer/media/image_capture_frame_grabber.h"
 #include "content/renderer/media/media_recorder_handler.h"
 #include "content/renderer/media/renderer_webaudiodevice_impl.h"
 #include "content/renderer/media/renderer_webmidiaccessor_impl.h"
 #include "content/renderer/media/rtc_certificate_generator.h"
 #include "content/renderer/mojo/blink_service_registry_impl.h"
 #include "content/renderer/render_thread_impl.h"
 #include "content/renderer/renderer_clipboard_delegate.h"
 #include "content/renderer/screen_orientation/screen_orientation_observer.h"
@@ skipping 894 matching lines @@
   AddVideoTrackToMediaStream(
       HtmlVideoElementCapturerSource::CreateFromWebMediaPlayerImpl(
           web_media_player,
           content::RenderThread::Get()->GetIOMessageLoopProxy()),
       false,  // is_remote
       false,  // is_readonly
       web_media_stream);
 #endif
 }
 
+void RendererBlinkPlatformImpl::createHTMLAudioElementCapturer(
+    WebMediaStream* web_media_stream,
+    WebMediaPlayer* web_media_player) {
+  DCHECK(web_media_stream);
+  DCHECK(web_media_player);
+
+  blink::WebMediaStreamSource web_media_stream_source;
+  blink::WebMediaStreamTrack web_media_stream_track;
+  const WebString track_id = WebString::fromUTF8(base::GenerateGUID());
+
+  web_media_stream_source.initialize(track_id,
+                                     blink::WebMediaStreamSource::TypeAudio,
+                                     track_id,
+                                     false /* is_remote */);
+  web_media_stream_track.initialize(web_media_stream_source);
+
+  MediaStreamAudioSource* const media_stream_source =
+      HtmlAudioElementCapturerSource::CreateFromWebMediaPlayerImpl(
+          web_media_player);
+
+  // Takes ownership of |media_stream_source|.
+  web_media_stream_source.setExtraData(media_stream_source);
+
+  media_stream_source->ConnectToTrack(web_media_stream_track);
+  web_media_stream->addTrack(web_media_stream_track);
+}
+
 //------------------------------------------------------------------------------
 
 WebImageCaptureFrameGrabber*
 RendererBlinkPlatformImpl::createImageCaptureFrameGrabber() {
 #if defined(ENABLE_WEBRTC)
   return new ImageCaptureFrameGrabber();
 #else
   return nullptr;
 #endif  // defined(ENABLE_WEBRTC)
 }
@@ skipping 321 matching lines @@
   return &trial_token_validator_;
 }
 
 void RendererBlinkPlatformImpl::workerContextCreated(
     const v8::Local<v8::Context>& worker) {
   GetContentClient()->renderer()->DidInitializeWorkerContextOnWorkerThread(
       worker);
 }
 
 }  // namespace content