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      1 /*
      2  * libjingle
      3  * Copyright 2013 Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #ifndef TALK_MEDIA_BASE_AUDIORENDERER_H_
     29 #define TALK_MEDIA_BASE_AUDIORENDERER_H_
     30 
     31 namespace cricket {
     32 
     33 // Abstract interface for holding the voice channel IDs.
     34 class AudioRenderer {
     35  public:
     36   // Add the WebRtc VoE channel to the renderer.
     37   // For local stream, multiple WebRtc VoE channels can be connected to the
     38   // renderer. While for remote stream, only one WebRtc VoE channel can be
     39   // connected to the renderer.
     40   virtual void AddChannel(int channel_id) = 0;
     41 
     42   // Remove the WebRtc VoE channel from the renderer.
     43   // This method is called when the VoE channel is going away.
     44   virtual void RemoveChannel(int channel_id) = 0;
     45 
     46  protected:
     47   virtual ~AudioRenderer() {}
     48 };
     49 
     50 }  // namespace cricket
     51 
     52 #endif  // TALK_MEDIA_BASE_AUDIORENDERER_H_
     53