cast: Support for low-latency interactive mode

chrome/renderer/media/cast_rtp_stream.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 CHROME_RENDERER_MEDIA_CAST_RTP_STREAM_H_
 #define CHROME_RENDERER_MEDIA_CAST_RTP_STREAM_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
+#include "media/cast/cast_config.h"
+#include "media/cast/constants.h"
 #include "third_party/WebKit/public/platform/WebMediaStreamTrack.h"
 
 namespace base {
 class BinaryValue;
 class DictionaryValue;
 }
 
 class CastAudioSink;
 class CastSession;
 class CastVideoSink;
 
 // A key value pair structure for codec specific parameters.
 struct CastCodecSpecificParams {
   std::string key;
   std::string value;
 
   CastCodecSpecificParams();
   ~CastCodecSpecificParams();
 };
 
 // Defines the basic properties of a payload supported by cast transport.
 struct CastRtpPayloadParams {
   // RTP specific field that identifies the content type.
-  int payload_type;
+  int payload_type = media::cast::kDefaultRtpVideoPayloadType;
 
   // Maximum latency in milliseconds. Implemetation tries to keep latency
   // under this threshold.
-  int max_latency_ms;
+  int max_latency_ms = media::cast::kDefaultRtpMaxDelayMs;
 
   // Minimum latency.
   // Default value (0) means use max_latency_ms.
-  int min_latency_ms;
+  int min_latency_ms = 0;
+
+  // Starting latency on animated content.
+  // Default value (0) means use max_latency_ms.
+  int animated_latency_ms = 0;
 
   // RTP specific field to identify a stream.
-  int ssrc;
+  int ssrc = 1;
 
   // RTP specific field to idenfity the feedback stream.
-  int feedback_ssrc;
+  int feedback_ssrc = 2;
 
   // Update frequency of payload sample.
-  int clock_rate;
+  int clock_rate = media::cast::kVideoFrequency;
 
   // Maximum bitrate in kilobits per second.
-  int max_bitrate;
+  int max_bitrate = media::cast::kDefaultMaxVideoKbps;
 
   // Minimum bitrate in kilobits per second.
-  int min_bitrate;
+  int min_bitrate = media::cast::kDefaultMinVideoKbps;
 
   // Number of audio channels.
-  int channels;
+  int channels = 1;
 
   // The maximum frame rate.
-  double max_frame_rate;
+  double max_frame_rate = media::cast::kDefaultMaxFrameRate;
 
   // Name of the codec used.
   std::string codec_name;
 
   // AES encryption key.
   std::string aes_key;
 
   // AES encryption IV mask.
   std::string aes_iv_mask;
 
@@ skipping 78 matching lines @@
   CastRtpParams params_;
   base::Closure stop_callback_;
   ErrorCallback error_callback_;
 
   base::WeakPtrFactory<CastRtpStream> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CastRtpStream);
 };
 
 #endif  // CHROME_RENDERER_MEDIA_CAST_RTP_STREAM_H_