Add Cast PLI support on sender side.

media/cast/net/rtcp/test_rtcp_packet_builder.cc

 // Copyright 2014 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/net/rtcp/test_rtcp_packet_builder.h"
 
 #include "base/logging.h"
 #include "media/cast/net/rtcp/rtcp_utility.h"
 
 namespace media {
@@ skipping 165 matching lines @@
   for (uint8_t ack_bits : ack_bitmasks)
     big_endian_writer_.WriteU8(ack_bits);
 
   // Pad to ensure the extra CST2 data chunk is 32-bit aligned.
   for (size_t num_bytes_written = 6 + ack_bitmasks.size();
        num_bytes_written % 4; ++num_bytes_written) {
     big_endian_writer_.WriteU8(0);
   }
 }
 
+void TestRtcpPacketBuilder::AddPli(uint32_t sender_ssrc, uint32_t media_ssrc) {

[Irfan, 2016/02/29 16:01:23]

Same as previous comment. I find "sender" and "media" on SSRC unclear, does
local and remote make sense here as well ?

[xjz, 2016/02/29 19:48:58]

Done.

+  AddRtcpHeader(206, 1);
+  big_endian_writer_.WriteU32(sender_ssrc);
+  big_endian_writer_.WriteU32(media_ssrc);
+}
+
 void TestRtcpPacketBuilder::AddReceiverLog(uint32_t sender_ssrc) {
   AddRtcpHeader(204, 2);
   big_endian_writer_.WriteU32(sender_ssrc);
   big_endian_writer_.WriteU8('C');
   big_endian_writer_.WriteU8('A');
   big_endian_writer_.WriteU8('S');
   big_endian_writer_.WriteU8('T');
 }
 
 void TestRtcpPacketBuilder::AddReceiverFrameLog(uint32_t rtp_timestamp,
@@ skipping 54 matching lines @@
   big_endian_writer_.WriteU8(0x80 | (format_or_count & 0x1F));
   big_endian_writer_.WriteU8(payload);
   ptr_of_length_ = big_endian_writer_.ptr();
 
   // Initialize length to "clearly illegal".
   big_endian_writer_.WriteU16(0xDEAD);
 }
 
 }  // namespace cast
 }  // namespace media