Prevent a voice channel from sending data before a renderer is set.

webrtc/media/base/audiorenderer.h

-/*
- *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#ifndef WEBRTC_MEDIA_BASE_AUDIORENDERER_H_
-#define WEBRTC_MEDIA_BASE_AUDIORENDERER_H_
-
-#include <cstddef>
-
-namespace cricket {
-
-// Abstract interface for rendering the audio data.
-class AudioRenderer {

[pthatcher1, 2016/03/08 17:46:51]

We should make sure this doesn't break the Chrome FYI bots because of this:

//src/content/renderer/media/webrtc/webrtc_local_audio_track_adapter.h

- public:
-  class Sink {
-   public:
-    // Callback to receive data from the AudioRenderer.
-    virtual void OnData(const void* audio_data,
-                        int bits_per_sample,
-                        int sample_rate,
-                        size_t number_of_channels,
-                        size_t number_of_frames) = 0;
-
-    // Called when the AudioRenderer is going away.
-    virtual void OnClose() = 0;
-
-   protected:
-    virtual ~Sink() {}
-  };
-
-  // Sets a sink to the AudioRenderer. There can be only one sink connected
-  // to the renderer at a time.
-  virtual void SetSink(Sink* sink) {}
-
- protected:
-  virtual ~AudioRenderer() {}
-};
-
-}  // namespace cricket
-
-#endif  // WEBRTC_MEDIA_BASE_AUDIORENDERER_H_