Adding audio network adaptor to AudioEncoderOpus.

webrtc/modules/audio_coding/codecs/opus/opus_interface.h

 /*
  *  Copyright (c) 2012 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.
  */
 
@@ skipping 197 matching lines @@
  *
  * Input:
  *      - inst               : Encoder context
  *      - num_channels       : 0 - Not forced
  *                             1 - Mono
  *                             2 - Stereo
  *
  * Return value              :  0 - Success
  *                             -1 - Error
  */
-int16_t WebRtcOpus_SetForceChannels(OpusEncInst* inst, int32_t num_channels);
+int16_t WebRtcOpus_SetForceChannels(OpusEncInst* inst, size_t num_channels);

[minyue-webrtc, 2016/10/06 11:24:05]

I found that size_t suits better here and can avoid casting when being called
from AudioEncoderOpus.

Since WebRtcOpus_SetForceChannels's only use case is in this CL, I think it is
fine to fix this nit in this CL.

[kwiberg-webrtc, 2016/10/06 12:18:10]

Acknowledged.

 
 int16_t WebRtcOpus_DecoderCreate(OpusDecInst** inst, size_t channels);
 int16_t WebRtcOpus_DecoderFree(OpusDecInst* inst);
 
 /****************************************************************************
  * WebRtcOpus_DecoderChannels(...)
  *
  * This function returns the number of channels created for Opus decoder.
  */
 size_t WebRtcOpus_DecoderChannels(OpusDecInst* inst);
@@ skipping 133 matching lines @@
  *                                 1 - the packet contains FEC.
  */
 int WebRtcOpus_PacketHasFec(const uint8_t* payload,
                             size_t payload_length_bytes);
 
 #ifdef __cplusplus
 }  // extern "C"
 #endif
 
 #endif  // WEBRTC_MODULES_AUDIO_CODING_CODECS_OPUS_OPUS_INTERFACE_H_