blob: ca434940dc2bd7e3fbcd130375952682cbe9f453 [file] [log] [blame]
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
#include <memory>
#include <string>
#include <vector>
#include "webrtc/media/base/mediachannel.h"
#include "webrtc/media/base/mediaconstants.h"
#include "webrtc/media/base/mediaengine.h"
namespace cricket {
struct DataCodec;
class RtpDataEngine : public DataEngineInterface {
virtual DataMediaChannel* CreateChannel(const MediaConfig& config);
virtual const std::vector<DataCodec>& data_codecs() {
return data_codecs_;
std::vector<DataCodec> data_codecs_;
// Keep track of sequence number and timestamp of an RTP stream. The
// sequence number starts with a "random" value and increments. The
// timestamp starts with a "random" value and increases monotonically
// according to the clockrate.
class RtpClock {
RtpClock(int clockrate, uint16_t first_seq_num, uint32_t timestamp_offset)
: clockrate_(clockrate),
timestamp_offset_(timestamp_offset) {}
// Given the current time (in number of seconds which must be
// monotonically increasing), Return the next sequence number and
// timestamp.
void Tick(double now, int* seq_num, uint32_t* timestamp);
int clockrate_;
uint16_t last_seq_num_;
uint32_t timestamp_offset_;
class RtpDataMediaChannel : public DataMediaChannel {
RtpDataMediaChannel(const MediaConfig& config);
virtual ~RtpDataMediaChannel();
virtual bool SetSendParameters(const DataSendParameters& params);
virtual bool SetRecvParameters(const DataRecvParameters& params);
virtual bool AddSendStream(const StreamParams& sp);
virtual bool RemoveSendStream(uint32_t ssrc);
virtual bool AddRecvStream(const StreamParams& sp);
virtual bool RemoveRecvStream(uint32_t ssrc);
virtual bool SetSend(bool send) {
sending_ = send;
return true;
virtual bool SetReceive(bool receive) {
receiving_ = receive;
return true;
virtual void OnPacketReceived(rtc::CopyOnWriteBuffer* packet,
const rtc::PacketTime& packet_time);
virtual void OnRtcpReceived(rtc::CopyOnWriteBuffer* packet,
const rtc::PacketTime& packet_time) {}
virtual void OnReadyToSend(bool ready) {}
virtual void OnTransportOverheadChanged(int transport_overhead_per_packet) {}
virtual bool SendData(
const SendDataParams& params,
const rtc::CopyOnWriteBuffer& payload,
SendDataResult* result);
virtual rtc::DiffServCodePoint PreferredDscp() const;
void Construct();
bool SetMaxSendBandwidth(int bps);
bool SetSendCodecs(const std::vector<DataCodec>& codecs);
bool SetRecvCodecs(const std::vector<DataCodec>& codecs);
bool sending_;
bool receiving_;
std::vector<DataCodec> send_codecs_;
std::vector<DataCodec> recv_codecs_;
std::vector<StreamParams> send_streams_;
std::vector<StreamParams> recv_streams_;
std::map<uint32_t, RtpClock*> rtp_clock_by_send_ssrc_;
std::unique_ptr<rtc::RateLimiter> send_limiter_;
} // namespace cricket