Extract bitrate allocation of spatial/temporal layers out of codec impl.

webrtc/modules/video_coding/video_coding_impl.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 16 matching lines @@
 #include "webrtc/modules/video_coding/generic_encoder.h"
 #include "webrtc/modules/video_coding/jitter_buffer.h"
 #include "webrtc/modules/video_coding/media_optimization.h"
 #include "webrtc/modules/video_coding/receiver.h"
 #include "webrtc/modules/video_coding/timing.h"
 #include "webrtc/modules/video_coding/utility/qp_parser.h"
 #include "webrtc/system_wrappers/include/clock.h"
 
 namespace webrtc {
 
+class VideoBitrateAllocator;
+
 namespace vcm {
 
 class VCMProcessTimer {
  public:
   VCMProcessTimer(int64_t periodMs, Clock* clock)
       : _clock(clock),
         _periodMs(periodMs),
         _latestMs(_clock->TimeInMilliseconds()) {}
   int64_t Period() const;
   int64_t TimeUntilProcess() const;
@@ skipping 21 matching lines @@
                             uint32_t numberOfCores,
                             uint32_t maxPayloadSize);
 
   void RegisterExternalEncoder(VideoEncoder* externalEncoder,
                                uint8_t payloadType,
                                bool internalSource);
 
   int Bitrate(unsigned int* bitrate) const;
   int FrameRate(unsigned int* framerate) const;
 
-  int32_t SetChannelParameters(uint32_t target_bitrate,  // bits/s.
+  int32_t SetChannelParameters(uint32_t target_bitrate_bps,
                                uint8_t lossRate,
-                               int64_t rtt);
+                               int64_t rtt,
+                               VideoBitrateAllocator* bitrate_allocator);
+  // Calls SetChannelParameters(), with the previous target bitrate, loss rate
+  // and RTT, but reallocates the bitrate allocation based on a presumably
+  // updated codec configuration.
+  int32_t UpdateChannelParemeters(VideoBitrateAllocator* bitrate_allocator);
+
   // Deprecated:
   // TODO(perkj): Remove once no projects use it.
   int32_t RegisterProtectionCallback(VCMProtectionCallback* protection);
 
   int32_t AddVideoFrame(const VideoFrame& videoFrame,
                         const CodecSpecificInfo* codecSpecificInfo);
 
   int32_t IntraFrameRequest(size_t stream_index);
   int32_t EnableFrameDropper(bool enable);
 
@@ skipping 110 matching lines @@
   VCMProcessTimer _receiveStatsTimer;
   VCMProcessTimer _retransmissionTimer;
   VCMProcessTimer _keyRequestTimer;
   QpParser qp_parser_;
   ThreadUnsafeOneTimeEvent first_frame_received_;
 };
 
 }  // namespace vcm
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_VIDEO_CODING_VIDEO_CODING_IMPL_H_