Implement adaptive target delay extension

media/cast/net/rtp/rtp_parser.cc

Index: media/cast/net/rtp/rtp_parser.cc
diff --git a/media/cast/net/rtp/rtp_parser.cc b/media/cast/net/rtp/rtp_parser.cc
index bed1d7c8d8f6489a4a68772fcf8f852fd7bb7151..f336bbd3cb34120be95b0e02614457600dec1f08 100644
--- a/media/cast/net/rtp/rtp_parser.cc
+++ b/media/cast/net/rtp/rtp_parser.cc
@@ -7,17 +7,11 @@
 #include "base/big_endian.h"
 #include "base/logging.h"
 #include "media/cast/cast_defines.h"
+#include "media/cast/net/rtp/rtp_defines.h"
 
 namespace media {
 namespace cast {
 
-static const size_t kRtpHeaderLength = 12;
-static const size_t kCastHeaderLength = 7;
-static const uint8 kRtpExtensionBitMask = 0x10;
-static const uint8 kRtpMarkerBitMask = 0x80;
-static const uint8 kCastKeyFrameBitMask = 0x80;
-static const uint8 kCastReferenceFrameIdBitMask = 0x40;
-
 RtpParser::RtpParser(uint32 expected_sender_ssrc, uint8 expected_payload_type)
     : expected_sender_ssrc_(expected_sender_ssrc),
       expected_payload_type_(expected_payload_type) {}
@@ -92,6 +86,22 @@ bool RtpParser::ParsePacket(const uint8* packet,
     return false;
   }
 
+  for (int i = 0; i < (bits & kCastExtensionCountmask); i++) {
+    uint16 type_and_size;
+    if (!reader.ReadU16(&type_and_size))
+      return false;
+    base::StringPiece tmp;
+    if (!reader.ReadPiece(&tmp, type_and_size & 0x3ff))
+      return false;
+    base::BigEndianReader chunk(tmp.data(), tmp.size());
+    switch (type_and_size >> 10) {
+      case kCastRTPExtensionAdaptiveLatency:
+        if (!chunk.ReadU16(&header->new_playout_delay_ms))
+          return false;
+
+    }
+  }
+
   // Only the lower 8 bits of the |frame_id| were serialized, so do some magic
   // to restore the upper 24 bits.
   //