Set the RTP payload type to fixed values for audio/video streams.

media/cast/receiver/frame_receiver.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/receiver/frame_receiver.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/big_endian.h"
@@ skipping 22 matching lines @@
 namespace media {
 namespace cast {
 
 FrameReceiver::FrameReceiver(
     const scoped_refptr<CastEnvironment>& cast_environment,
     const FrameReceiverConfig& config,
     EventMediaType event_media_type,
     CastTransport* const transport)
     : cast_environment_(cast_environment),
       transport_(transport),
-      packet_parser_(config.sender_ssrc,
-                     static_cast<uint8_t>(config.rtp_payload_type)),
+      packet_parser_(
+          config.sender_ssrc,
+          config.rtp_payload_type <= RtpPayloadType::AUDIO_LAST ? 127 : 96),
       stats_(cast_environment->Clock()),
       event_media_type_(event_media_type),
       event_subscriber_(kReceiverRtcpEventHistorySize, event_media_type),
       rtp_timebase_(config.rtp_timebase),
       target_playout_delay_(
           base::TimeDelta::FromMilliseconds(config.rtp_max_delay_ms)),
       expected_frame_duration_(
           base::TimeDelta::FromSecondsD(1.0 / config.target_frame_rate)),
       reports_are_scheduled_(false),
       framer_(cast_environment->Clock(),
@@ skipping 340 matching lines @@
     transport_->AddCastFeedback(*cast_message, target_delay);
   if (pli_message)
     transport_->AddPli(*pli_message);
   if (rtcp_events)
     transport_->AddRtcpEvents(*rtcp_events);
   transport_->SendRtcpFromRtpReceiver();
 }
 
 }  // namespace cast
 }  // namespace media