Generate FMTP parameters for the H.264 codec.

webrtc/media/base/mediaconstants.cc

 /*
  *  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 98 matching lines @@
     "urn:3gpp:video-orientation:6";
 
 const int kRtpTransportSequenceNumberHeaderExtensionDefaultId = 5;
 const char kRtpTransportSequenceNumberHeaderExtension[] =
     "http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01";
 
 const char kVp8CodecName[] = "VP8";
 const char kVp9CodecName[] = "VP9";
 const char kH264CodecName[] = "H264";
 
+// RFC 6184 RTP Payload Format for H.264 video
+const char kH264FmtpProfileLevelId[] = "profile-level-id";

[juberti2, 2016/04/13 20:20:58]

The precedent here is kCodecParamFoo, or perhaps in this case, kH264Param foo
(see the opus params above).

[hta-webrtc, 2016/04/13 20:43:58]

The precedent is wrong. The namespace for FMTP parameters is scoped by codec,
mixing the names of FMTP codec parameters like these with the names of codec
parameters that go on a= lines is going to cause confusion.

+const char kH264FmtpLevelAsymmetryAllowed[] = "level-asymmetry-allowed";
+const char kH264FmtpPacketizationMode[] = "packetization-mode";
+const char kH264ProfileLevelConstrainedBaseline[] = "42e01f";
+
 const int kDefaultVp8PlType = 100;
 const int kDefaultVp9PlType = 101;
 const int kDefaultH264PlType = 107;
 const int kDefaultRedPlType = 116;
 const int kDefaultUlpfecType = 117;
 const int kDefaultRtxVp8PlType = 96;
 const int kDefaultRtxVp9PlType = 97;
 const int kDefaultRtxRedPlType = 98;
 const int kDefaultRtxH264PlType = 99;
 
 const int kDefaultVideoMaxWidth = 640;
 const int kDefaultVideoMaxHeight = 400;
 const int kDefaultVideoMaxFramerate = 30;
 }  // namespace cricket