Adding cbr support for Opus

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

 /*
  *  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 187 matching lines @@
     int ret = opus_encoder_ctl(inst->encoder,
                                OPUS_SET_SIGNAL(OPUS_AUTO));
     if (ret != OPUS_OK)
       return ret;
     return opus_encoder_ctl(inst->encoder, OPUS_SET_DTX(0));
   } else {
     return -1;
   }
 }
 
+int16_t WebRtcOpus_EnableCbr(OpusEncInst* inst) {
+  if (inst) {
+    return opus_encoder_ctl(inst->encoder, OPUS_SET_VBR(0));
+  } else {
+    return -1;
+  }
+}
+
+int16_t WebRtcOpus_DisableCbr(OpusEncInst* inst) {
+  if (inst) {
+    return opus_encoder_ctl(inst->encoder, OPUS_SET_VBR(1));
+  } else {
+    return -1;
+  }
+}
+
 int16_t WebRtcOpus_SetComplexity(OpusEncInst* inst, int32_t complexity) {
   if (inst) {
     return opus_encoder_ctl(inst->encoder, OPUS_SET_COMPLEXITY(complexity));
   } else {
     return -1;
   }
 }
 
 int16_t WebRtcOpus_SetForceChannels(OpusEncInst* inst, size_t num_channels) {
   if (!inst)
@@ skipping 260 matching lines @@
     return 0;
   }
 
   for (n = 0; n < channels; n++) {
     if (frame_data[0][0] & (0x80 >> ((n + 1) * (frames + 1) - 1)))
       return 1;
   }
 
   return 0;
 }