media/cast/sender/congestion_control.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef MEDIA_CAST_CONGESTION_CONTROL_CONGESTION_CONTROL_H_
   6 #define MEDIA_CAST_CONGESTION_CONTROL_CONGESTION_CONTROL_H_
   7
   8 #include <deque>
   9
  10 #include "base/basictypes.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/time/tick_clock.h"
  13 #include "base/time/time.h"
  14
  15 namespace media {
  16 namespace cast {
  17
  18 class CongestionControl {
  19  public:
  20   virtual ~CongestionControl();
  21
  22   // Called with latest measured rtt value.
  23   virtual void UpdateRtt(base::TimeDelta rtt) = 0;
  24
  25   // Called with an updated target playout delay value.
  26   virtual void UpdateTargetPlayoutDelay(base::TimeDelta delay) = 0;
  27
  28   // Called when an encoded frame is sent to the transport.
  29   virtual void SendFrameToTransport(uint32 frame_id,
  30                                     size_t frame_size,
  31                                     base::TimeTicks when) = 0;
  32   // Called when we receive an ACK for a frame.
  33   virtual void AckFrame(uint32 frame_id, base::TimeTicks when) = 0;
  34
  35   // Returns the bitrate we should use for the next frame.
  36   virtual uint32 GetBitrate(base::TimeTicks playout_time,
  37                             base::TimeDelta playout_delay) = 0;
  38 };
  39
  40 CongestionControl* NewAdaptiveCongestionControl(
  41     base::TickClock* clock,
  42     uint32 max_bitrate_configured,
  43     uint32 min_bitrate_configured,
  44     double max_frame_rate);
  45
  46 CongestionControl* NewFixedCongestionControl(uint32 bitrate);
  47
  48 }  // namespace cast
  49 }  // namespace media
  50
  51 #endif  // MEDIA_CAST_CONGESTION_CONTROL_CONGESTION_CONTROL_H_