[Cast] Clean-up: Merge RtpReceiver+AudioReceiver+VideoReceiver-->FrameReceiver.

media/cast/rtp_receiver/rtp_receiver.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/rtp_receiver/rtp_receiver.h"
-
-#include "base/big_endian.h"
-#include "base/logging.h"
-#include "media/cast/rtp_receiver/receiver_stats.h"
-#include "media/cast/rtp_receiver/rtp_parser/rtp_parser.h"
-#include "media/cast/rtp_receiver/rtp_receiver_defines.h"
-
-namespace media {
-namespace cast {
-
-RtpReceiver::RtpReceiver(base::TickClock* clock,
-                         const FrameReceiverConfig* audio_config,
-                         const FrameReceiverConfig* video_config) :
-    packet_parser_(audio_config ? audio_config->incoming_ssrc :
-                   (video_config ? video_config->incoming_ssrc : 0),
-                   audio_config ? audio_config->rtp_payload_type :
-                   (video_config ? video_config->rtp_payload_type : 0)),
-    stats_(clock) {
-  DCHECK(audio_config || video_config);
-}
-
-RtpReceiver::~RtpReceiver() {}
-
-// static
-uint32 RtpReceiver::GetSsrcOfSender(const uint8* rtcp_buffer, size_t length) {
-  DCHECK_GE(length, kMinLengthOfRtp) << "Invalid RTP packet";
-  uint32 ssrc_of_sender;
-  base::BigEndianReader big_endian_reader(
-      reinterpret_cast<const char*>(rtcp_buffer), length);
-  big_endian_reader.Skip(8);  // Skip header
-  big_endian_reader.ReadU32(&ssrc_of_sender);
-  return ssrc_of_sender;
-}
-
-bool RtpReceiver::ReceivedPacket(const uint8* packet, size_t length) {
-  RtpCastHeader rtp_header;
-  const uint8* payload_data;
-  size_t payload_size;
-  if (!packet_parser_.ParsePacket(
-          packet, length, &rtp_header, &payload_data, &payload_size)) {
-    return false;
-  }
-
-  OnReceivedPayloadData(payload_data, payload_size, rtp_header);
-  stats_.UpdateStatistics(rtp_header);
-  return true;
-}
-
-}  // namespace cast
-}  // namespace media