Adding cbr support for Opus

webrtc/media/base/mediaconstants.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 36 matching lines @@
 extern const char kDtmfCodecName[];
 
 // Attribute parameters
 extern const char kCodecParamPTime[];
 extern const char kCodecParamMaxPTime[];
 // fmtp parameters
 extern const char kCodecParamMinPTime[];
 extern const char kCodecParamSPropStereo[];
 extern const char kCodecParamStereo[];
 extern const char kCodecParamUseInbandFec[];
+extern const char kCodecParamUseCbr[];
 extern const char kCodecParamUseDtx[];
 extern const char kCodecParamMaxAverageBitrate[];
 extern const char kCodecParamMaxPlaybackRate[];
 extern const char kCodecParamSctpProtocol[];
 extern const char kCodecParamSctpStreams[];
 
 extern const char kParamValueTrue[];
 // Parameters are stored as parameter/value pairs. For parameters who do not
 // have a value, |kParamValueEmpty| should be used as value.
 extern const char kParamValueEmpty[];
 
 // opus parameters.
 // Default value for maxptime according to
 // http://tools.ietf.org/html/draft-spittka-payload-rtp-opus-03
 extern const int kOpusDefaultMaxPTime;
 extern const int kOpusDefaultPTime;
 extern const int kOpusDefaultMinPTime;
 extern const int kOpusDefaultSPropStereo;
 extern const int kOpusDefaultStereo;
 extern const int kOpusDefaultUseInbandFec;
 extern const int kOpusDefaultUseDtx;
+extern const int kOpusDefaultUseCbr;

[minyue-webrtc, 2017/03/29 20:45:26]

nit: if you place Cbr before Dtx everywhere else, do the same here

 extern const int kOpusDefaultMaxPlaybackRate;
 
 // Prefered values in this code base. Note that they may differ from the default
 // values in http://tools.ietf.org/html/draft-spittka-payload-rtp-opus-03
 // Only frames larger or equal to 10 ms are currently supported in this code
 // base.
 extern const int kPreferredMaxPTime;
 extern const int kPreferredMinPTime;
 extern const int kPreferredSPropStereo;
 extern const int kPreferredStereo;
@@ skipping 40 matching lines @@
 extern const char kH264FmtpProfileLevelId[];
 extern const char kH264FmtpLevelAsymmetryAllowed[];
 extern const char kH264FmtpPacketizationMode[];
 extern const char kH264FmtpSpropParameterSets[];
 extern const char kH264ProfileLevelConstrainedBaseline[];
 
 extern const int kDefaultVideoMaxFramerate;
 }  // namespace cricket
 
 #endif  // WEBRTC_MEDIA_BASE_MEDIACONSTANTS_H_