Adds MediaStreamSource, MediaStreamAudioSource and MediaStreamVideoCaptureDeviceSource

content/renderer/media/media_stream_audio_source.h

+// Copyright 2014 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.
+
+#ifndef CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_SOURCE_H_
+#define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_SOURCE_H_
+
+#include "base/compiler_specific.h"
+#include "content/common/content_export.h"
+#include "content/renderer/media/media_stream_source.h"
+#include "content/renderer/media/webrtc_audio_capturer.h"
+#include "third_party/libjingle/source/talk/app/webrtc/mediastreaminterface.h"
+
+namespace content {
+
+class CONTENT_EXPORT MediaStreamAudioSource
+    : NON_EXPORTED_BASE(public MediaStreamSource) {
+ public:
+  MediaStreamAudioSource(const StreamDeviceInfo& device_info,
+                         const SourceStopCallback& stop_callback);
+  MediaStreamAudioSource();
+  virtual ~MediaStreamAudioSource();
+
+  virtual void ApplyConstraints(const blink::WebMediaStreamTrack& track,
+                                const blink::WebMediaConstraints& constraints,
+                                const ConstraintsCallback& callback) OVERRIDE;
+
+  void SetLocalAudioSource(webrtc::AudioSourceInterface* source) {
+    local_audio_source_ = source;
+  }
+
+  void SetAudioCapturer(WebRtcAudioCapturer* capturer) {
+    DCHECK(!audio_capturer_);
+    audio_capturer_ = capturer;
+  }
+
+  WebRtcAudioCapturer* GetAudioCapturer() const {
+    // TODO(perkj): |audio_capturer_| can currently be reconfigured to use
+    // another microphone even after it has been created since only one
+    // capturer is supported. See issue crbug/262117.
+    // It would make more sense if a WebRtcAudioCapturer represent one and only
+    // one audio source.
+    if (audio_capturer_ &&
+        device_info_.session_id == audio_capturer_->session_id()) {
+      return audio_capturer_;
+    }
+    return NULL;
+  }
+
+  webrtc::AudioSourceInterface* local_audio_source() {
+    return local_audio_source_.get();
+  }
+
+ protected:
+  virtual void DoStopSource() OVERRIDE;
+
+ private:
+  StreamDeviceInfo device_info_;
+
+  // This member holds an instance of webrtc::LocalAudioSource. This is used
+  // as a container for audio options.
+  // TODO(hclam): This should be merged with |audio_source_| such that it
+  // carries audio options.
+  scoped_refptr<webrtc::AudioSourceInterface> local_audio_source_;
+
+  scoped_refptr<WebRtcAudioCapturer> audio_capturer_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaStreamAudioSource);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_SOURCE_H_