Change SimulcastEncoderAdapter to allow a 0 for SetRates.

webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter.cc

 /*
  *  Copyright (c) 2014 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 345 matching lines @@
                                       uint32_t new_framerate) {
   if (!Initialized()) {
     return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
   }
   if (new_framerate < 1) {
     return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
   }
   if (codec_.maxBitrate > 0 && new_bitrate_kbit > codec_.maxBitrate) {
     new_bitrate_kbit = codec_.maxBitrate;
   }
-  if (new_bitrate_kbit < codec_.minBitrate) {
-    new_bitrate_kbit = codec_.minBitrate;
-  }
-  if (codec_.numberOfSimulcastStreams > 0 &&
-      new_bitrate_kbit < codec_.simulcastStream[0].minBitrate) {
-    new_bitrate_kbit = codec_.simulcastStream[0].minBitrate;
+  if (new_bitrate_kbit > 0) {
+    // Make sure the bitrate fits the configured min bitrates. 0 is a special
+    // value that means paused, though, so leave it alone.
+    if (new_bitrate_kbit < codec_.minBitrate) {
+      new_bitrate_kbit = codec_.minBitrate;
+    }
+    if (codec_.numberOfSimulcastStreams > 0 &&
+        new_bitrate_kbit < codec_.simulcastStream[0].minBitrate) {
+      new_bitrate_kbit = codec_.simulcastStream[0].minBitrate;
+    }
   }
   codec_.maxFramerate = new_framerate;
 
   bool send_stream = true;
   uint32_t stream_bitrate = 0;
   for (size_t stream_idx = 0; stream_idx < streaminfos_.size(); ++stream_idx) {
     stream_bitrate = GetStreamBitrate(stream_idx, streaminfos_.size(),
                                       new_bitrate_kbit, &send_stream);
     // Need a key frame if we have not sent this stream before.
     if (send_stream && !streaminfos_[stream_idx].send_stream) {
@@ skipping 139 matching lines @@
       return false;
   }
   return true;
 }
 
 const char* SimulcastEncoderAdapter::ImplementationName() const {
   return implementation_name_.c_str();
 }
 
 }  // namespace webrtc