Cast: Basic cast_receiver API for chrome.

content/public/renderer/media_stream_source_api.cc

+// Copyright 2015 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/public/renderer/media_stream_source_api.h"
+
+#include "base/callback.h"
+#include "base/strings/utf_string_conversions.h"
+#include "content/renderer/media/media_stream_audio_source.h"
+#include "content/renderer/media/media_stream_video_capturer_source.h"
+#include "media/base/audio_capturer_source.h"
+#include "media/video/capture/video_capturer_source.h"
+#include "third_party/WebKit/public/platform/WebMediaDeviceInfo.h"
+#include "third_party/WebKit/public/platform/WebMediaStreamSource.h"
+
+namespace content {
+
+void InitializeVideoWebMediaSource(
+    scoped_refptr<media::VideoCapturerSource> source,
+    blink::WebMediaStreamSource* webkit_source) {
+  webkit_source->initialize(base::UTF8ToUTF16(""),
+                            blink::WebMediaStreamSource::TypeVideo,
+                            base::UTF8ToUTF16(""),
+                            true /* remote */,
+                            true /* readonly */);
+  webkit_source->setExtraData(
+      new content::MediaStreamVideoCapturerSource(
+          StreamDeviceInfo(),
+          content::MediaStreamSource::SourceStoppedCallback(),
+          source));
+}
+
+void InitializeAudioWebMediaSource(
+    scoped_refptr<media::AudioCapturerSource> source,
+    blink::WebMediaStreamSource* webkit_source) {
+  webkit_source->initialize(base::UTF8ToUTF16(""),
+                            blink::WebMediaStreamSource::TypeAudio,
+                            base::UTF8ToUTF16(""),
+                            true /* remote */,
+                            true /* readonly */);
+  MediaStreamAudioSource* audio_source(
+        new MediaStreamAudioSource(
+            -1,
+            StreamDeviceInfo(),
+            content::MediaStreamSource::SourceStoppedCallback(),
+            RenderThreadImpl::current()->GetPeerConnectionDependencyFactory()));
+  scoped_refptr<WebRtcAudioCapturer> capturer(
+      WebRtcAudioCapturer::CreateCapturer(
+            -1,
+            StreamDeviceInfo(),
+            blink::WebMediaConstraints(),
+            NULL,
+            audio_source));
+  media::AudioParameters params;
+  capturer->SetCapturerSource(source, params);
+  audio_source->SetAudioCapturer(capturer);
+  webkit_source->setExtraData(audio_source);
+}
+
+}  // namespace content