Adding build switch for Opus that supports 120ms ptime.

webrtc/modules/audio_coding/acm2/acm_codec_database.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 133 matching lines @@
 #ifdef WEBRTC_CODEC_G722
     // Mono
     {6, {160, 320, 480, 640, 800, 960}, 0, 2},
     // Stereo
     {6, {160, 320, 480, 640, 800, 960}, 0, 2},
 #endif
 #ifdef WEBRTC_CODEC_OPUS
     // Opus supports frames shorter than 10ms,
     // but it doesn't help us to use them.
     // Mono and stereo.
+#if WEBRTC_OPUS_SUPPORT_120MS_PTIME
+    {5, {480, 960, 1920, 2880, 5760}, 0, 2},
+#else
     {4, {480, 960, 1920, 2880}, 0, 2},
 #endif
+#endif
     // Comfort noise for three different sampling frequencies.
     {1, {240}, 240, 1},
     {1, {480}, 480, 1},
     {1, {960}, 960, 1},
 // TODO(solenberg): What is this flag? It is never set in the build files.
 #ifdef ENABLE_48000_HZ
     {1, {1440}, 1440, 1},
 #endif
     {1, {240}, 240, 1},
     {1, {240}, 240, 1},
@@ skipping 168 matching lines @@
 }
 // Gets codec id number from database for the receiver.
 int ACMCodecDB::ReceiverCodecNumber(const CodecInst& codec_inst) {
   // Look for a matching codec in the database.
   return CodecId(codec_inst);
 }
 
 }  // namespace acm2
 
 }  // namespace webrtc