Cast: First stab at implementing adaptive latency

media/cast/cast_config.cc

 // 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.
 
 #include "media/cast/cast_config.h"
 
 namespace media {
 namespace cast {
 
 // TODO(miu): Revisit code factoring of these structs.  There are a number of
 // common elements between them all, so it might be reasonable to only have one
 // or two structs; or, at least a common base class.
 
 // TODO(miu): Make sure all POD members are initialized by ctors.  Policy
 // decision: Reasonable defaults or use invalid placeholder values to expose
 // unset members?
 
 // TODO(miu): Provide IsValidConfig() functions?
 
 // TODO(miu): Throughout the code, there is a lot of copy-and-paste of the same
 // calculations based on these config values.  So, why don't we add methods to
 // these classes to centralize the logic?
 
 VideoSenderConfig::VideoSenderConfig()
     : ssrc(0),
       incoming_feedback_ssrc(0),
       rtcp_interval(kDefaultRtcpIntervalMs),
-      target_playout_delay(
+      min_playout_delay(
+          base::TimeDelta::FromMilliseconds(kDefaultRtpMaxDelayMs)),
+      max_playout_delay(
           base::TimeDelta::FromMilliseconds(kDefaultRtpMaxDelayMs)),
       rtp_payload_type(0),
       use_external_encoder(false),
       width(0),
       height(0),
       congestion_control_back_off(kDefaultCongestionControlBackOff),
       max_bitrate(5000000),
       min_bitrate(1000000),
       start_bitrate(5000000),
       max_qp(kDefaultMaxQp),
       min_qp(kDefaultMinQp),
       max_frame_rate(kDefaultMaxFrameRate),
       max_number_of_video_buffers_used(kDefaultNumberOfVideoBuffers),
       codec(CODEC_VIDEO_VP8),
       number_of_encode_threads(1) {}
 
 VideoSenderConfig::~VideoSenderConfig() {}
 
 AudioSenderConfig::AudioSenderConfig()
     : ssrc(0),
       incoming_feedback_ssrc(0),
       rtcp_interval(kDefaultRtcpIntervalMs),
-      target_playout_delay(
+      min_playout_delay(
+          base::TimeDelta::FromMilliseconds(kDefaultRtpMaxDelayMs)),
+      max_playout_delay(
           base::TimeDelta::FromMilliseconds(kDefaultRtpMaxDelayMs)),
       rtp_payload_type(0),
       use_external_encoder(false),
       frequency(0),
       channels(0),
       bitrate(0),
       codec(CODEC_AUDIO_OPUS) {}
 
 AudioSenderConfig::~AudioSenderConfig() {}
 
 FrameReceiverConfig::FrameReceiverConfig()
     : feedback_ssrc(0),
       incoming_ssrc(0),
       rtcp_interval(kDefaultRtcpIntervalMs),
       rtp_max_delay_ms(kDefaultRtpMaxDelayMs),
       rtp_payload_type(0),
       frequency(0),
       channels(0),
       max_frame_rate(0),
       codec(CODEC_UNKNOWN) {}
 
 FrameReceiverConfig::~FrameReceiverConfig() {}
 
 }  // namespace cast
 }  // namespace media