Cast: First stab at implementing adaptive latency

media/cast/cast_config.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_CAST_CAST_CONFIG_H_
 #define MEDIA_CAST_CAST_CONFIG_H_
 
 #include <list>
 #include <string>
 #include <vector>
@@ skipping 20 matching lines @@
 
   // Identifier referring to the sender, used by the receiver.
   uint32 ssrc;
 
   // The receiver's SSRC identifier.
   uint32 incoming_feedback_ssrc;
 
   int rtcp_interval;
 
   // The total amount of time between a frame's capture/recording on the sender
-  // and its playback on the receiver (i.e., shown to a user).  This is fixed as
-  // a value large enough to give the system sufficient time to encode,
+  // and its playback on the receiver (i.e., shown to a user).  This should be
+  // set to a value large enough to give the system sufficient time to encode,
   // transmit/retransmit, receive, decode, and render; given its run-time
   // environment (sender/receiver hardware performance, network conditions,
   // etc.).
-  base::TimeDelta target_playout_delay;
+  base::TimeDelta min_playout_delay;
+  base::TimeDelta max_playout_delay;
 
   // RTP payload type enum: Specifies the type/encoding of frame data.
   int rtp_payload_type;
 
   bool use_external_encoder;
   int frequency;
   int channels;
   int bitrate;  // Set to <= 0 for "auto variable bitrate" (libopus knows best).
   Codec codec;
 
@@ skipping 10 matching lines @@
 
   // Identifier referring to the sender, used by the receiver.
   uint32 ssrc;
 
   // The receiver's SSRC identifier.
   uint32 incoming_feedback_ssrc;  // TODO(miu): Rename to receiver_ssrc.
 
   int rtcp_interval;
 
   // The total amount of time between a frame's capture/recording on the sender
-  // and its playback on the receiver (i.e., shown to a user).  This is fixed as
-  // a value large enough to give the system sufficient time to encode,
+  // and its playback on the receiver (i.e., shown to a user).  This should be
+  // set to a value large enough to give the system sufficient time to encode,
   // transmit/retransmit, receive, decode, and render; given its run-time
   // environment (sender/receiver hardware performance, network conditions,
   // etc.).
-  base::TimeDelta target_playout_delay;
+  base::TimeDelta min_playout_delay;
+  base::TimeDelta max_playout_delay;
 
   // RTP payload type enum: Specifies the type/encoding of frame data.
   int rtp_payload_type;
 
   bool use_external_encoder;
   int width;  // Incoming frames will be scaled to this size.
   int height;
 
   float congestion_control_back_off;
   int max_bitrate;
@@ skipping 81 matching lines @@
 typedef base::Callback<void(scoped_ptr<base::SharedMemory>)>
     ReceiveVideoEncodeMemoryCallback;
 typedef base::Callback<void(size_t size,
                             const ReceiveVideoEncodeMemoryCallback&)>
     CreateVideoEncodeMemoryCallback;
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_CAST_CONFIG_H_