Cast:Moving netwrok sender related code to a designated folder

media/cast/rtp_sender/rtp_sender.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_sender/rtp_sender.h"
-
-#include "base/logging.h"
-#include "base/rand_util.h"
-#include "media/cast/cast_defines.h"
-#include "media/cast/pacing/paced_sender.h"
-#include "media/cast/rtcp/rtcp_defines.h"
-#include "net/base/big_endian.h"
-
-namespace media {
-namespace cast {
-
-RtpSender::RtpSender(scoped_refptr<CastEnvironment> cast_environment,
-                     const AudioSenderConfig* audio_config,
-                     const VideoSenderConfig* video_config,
-                     PacedPacketSender* transport)
-    : cast_environment_(cast_environment),
-      config_(),
-      transport_(transport) {
-  // Store generic cast config and create packetizer config.
-  DCHECK(audio_config || video_config) << "Invalid argument";
-  if (audio_config) {
-    storage_.reset(new PacketStorage(cast_environment->Clock(),
-                                     audio_config->rtp_history_ms));
-    config_.audio = true;
-    config_.ssrc = audio_config->sender_ssrc;
-    config_.payload_type = audio_config->rtp_payload_type;
-    config_.frequency = audio_config->frequency;
-    config_.audio_codec = audio_config->codec;
-  } else {
-    storage_.reset(new PacketStorage(cast_environment->Clock(),
-                                     video_config->rtp_history_ms));
-    config_.audio = false;
-    config_.ssrc = video_config->sender_ssrc;
-    config_.payload_type = video_config->rtp_payload_type;
-    config_.frequency = kVideoFrequency;
-    config_.video_codec = video_config->codec;
-  }
-  // Randomly set start values.
-  config_.sequence_number = base::RandInt(0, 65535);
-  config_.rtp_timestamp = base::RandInt(0, 65535);
-  config_.rtp_timestamp += base::RandInt(0, 65535) << 16;
-  packetizer_.reset(new RtpPacketizer(transport, storage_.get(), config_));
-}
-
-RtpSender::~RtpSender() {}
-
-void RtpSender::IncomingEncodedVideoFrame(const EncodedVideoFrame* video_frame,
-    const base::TimeTicks& capture_time) {
-  packetizer_->IncomingEncodedVideoFrame(video_frame, capture_time);
-}
-
-void RtpSender::IncomingEncodedAudioFrame(const EncodedAudioFrame* audio_frame,
-    const base::TimeTicks& recorded_time) {
-  packetizer_->IncomingEncodedAudioFrame(audio_frame, recorded_time);
-}
-
-void RtpSender::ResendPackets(
-    const MissingFramesAndPacketsMap& missing_frames_and_packets) {
-  // Iterate over all frames in the list.
-  for (MissingFramesAndPacketsMap::const_iterator it =
-       missing_frames_and_packets.begin();
-       it != missing_frames_and_packets.end(); ++it) {
-    PacketList packets_to_resend;
-    uint8 frame_id = it->first;
-    const PacketIdSet& packets_set = it->second;
-    bool success = false;
-
-    if (packets_set.empty()) {
-      VLOG(1) << "Missing all packets in frame " << static_cast<int>(frame_id);
-
-      uint16 packet_id = 0;
-      do {
-        // Get packet from storage.
-        success = storage_->GetPacket(frame_id, packet_id, &packets_to_resend);
-
-        // Resend packet to the network.
-        if (success) {
-          VLOG(1) << "Resend " << static_cast<int>(frame_id)
-                  << ":" << packet_id;
-          // Set a unique incremental sequence number for every packet.
-          Packet& packet = packets_to_resend.back();
-          UpdateSequenceNumber(&packet);
-          // Set the size as correspond to each frame.
-          ++packet_id;
-        }
-      } while (success);
-    } else {
-      // Iterate over all of the packets in the frame.
-      for (PacketIdSet::const_iterator set_it = packets_set.begin();
-          set_it != packets_set.end(); ++set_it) {
-        uint16 packet_id = *set_it;
-        success = storage_->GetPacket(frame_id, packet_id, &packets_to_resend);
-
-        // Resend packet to the network.
-        if (success) {
-          VLOG(1) << "Resend " << static_cast<int>(frame_id)
-                  << ":" << packet_id;
-          Packet& packet = packets_to_resend.back();
-          UpdateSequenceNumber(&packet);
-        }
-      }
-    }
-    transport_->ResendPackets(packets_to_resend);
-  }
-}
-
-void RtpSender::UpdateSequenceNumber(Packet* packet) {
-  uint16 new_sequence_number = packetizer_->NextSequenceNumber();
-  int index = 2;
-  (*packet)[index] = (static_cast<uint8>(new_sequence_number));
-  (*packet)[index + 1] =(static_cast<uint8>(new_sequence_number >> 8));
-}
-
-void RtpSender::RtpStatistics(const base::TimeTicks& now,
-                              RtcpSenderInfo* sender_info) {
-  // The timestamp of this Rtcp packet should be estimated as the timestamp of
-  // the frame being captured at this moment. We are calculating that
-  // timestamp as the last frame's timestamp + the time since the last frame
-  // was captured.
-  uint32 ntp_seconds = 0;
-  uint32 ntp_fraction = 0;
-  ConvertTimeTicksToNtp(now, &ntp_seconds, &ntp_fraction);
-  sender_info->ntp_seconds = ntp_seconds;
-  sender_info->ntp_fraction = ntp_fraction;
-
-  base::TimeTicks time_sent;
-  uint32 rtp_timestamp;
-  if (packetizer_->LastSentTimestamp(&time_sent, &rtp_timestamp)) {
-    base::TimeDelta time_since_last_send = now - time_sent;
-    sender_info->rtp_timestamp = rtp_timestamp +
-        time_since_last_send.InMilliseconds() * (config_.frequency / 1000);
-  } else {
-    sender_info->rtp_timestamp = 0;
-  }
-  sender_info->send_packet_count = packetizer_->send_packets_count();
-  sender_info->send_octet_count = packetizer_->send_octet_count();
-}
-
-}  //  namespace cast
-}  // namespace media