110 lines
3.3 KiB
C
110 lines
3.3 KiB
C
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/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MEDIA_BASE_RTP_DATA_ENGINE_H_
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#define MEDIA_BASE_RTP_DATA_ENGINE_H_
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#include <map>
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#include <memory>
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#include <string>
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#include <vector>
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#include "media/base/codec.h"
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#include "media/base/media_channel.h"
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#include "media/base/media_constants.h"
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#include "media/base/media_engine.h"
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namespace rtc {
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class DataRateLimiter;
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}
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namespace cricket {
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class RtpDataEngine : public DataEngineInterface {
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public:
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RtpDataEngine();
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virtual DataMediaChannel* CreateChannel(const MediaConfig& config);
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virtual const std::vector<DataCodec>& data_codecs() { return data_codecs_; }
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private:
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std::vector<DataCodec> data_codecs_;
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};
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// Keep track of sequence number and timestamp of an RTP stream. The
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// sequence number starts with a "random" value and increments. The
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// timestamp starts with a "random" value and increases monotonically
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// according to the clockrate.
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class RtpClock {
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public:
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RtpClock(int clockrate, uint16_t first_seq_num, uint32_t timestamp_offset)
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: clockrate_(clockrate),
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last_seq_num_(first_seq_num),
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timestamp_offset_(timestamp_offset) {}
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// Given the current time (in number of seconds which must be
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// monotonically increasing), Return the next sequence number and
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// timestamp.
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void Tick(double now, int* seq_num, uint32_t* timestamp);
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private:
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int clockrate_;
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uint16_t last_seq_num_;
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uint32_t timestamp_offset_;
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};
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class RtpDataMediaChannel : public DataMediaChannel {
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public:
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explicit RtpDataMediaChannel(const MediaConfig& config);
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virtual ~RtpDataMediaChannel();
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virtual bool SetSendParameters(const DataSendParameters& params);
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virtual bool SetRecvParameters(const DataRecvParameters& params);
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virtual bool AddSendStream(const StreamParams& sp);
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virtual bool RemoveSendStream(uint32_t ssrc);
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virtual bool AddRecvStream(const StreamParams& sp);
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virtual bool RemoveRecvStream(uint32_t ssrc);
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virtual void ResetUnsignaledRecvStream();
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virtual bool SetSend(bool send) {
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sending_ = send;
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return true;
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}
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virtual bool SetReceive(bool receive) {
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receiving_ = receive;
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return true;
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}
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virtual void OnPacketReceived(rtc::CopyOnWriteBuffer packet,
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int64_t packet_time_us);
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virtual void OnReadyToSend(bool ready) {}
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virtual bool SendData(const SendDataParams& params,
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const rtc::CopyOnWriteBuffer& payload,
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SendDataResult* result);
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private:
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void Construct();
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bool SetMaxSendBandwidth(int bps);
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bool SetSendCodecs(const std::vector<DataCodec>& codecs);
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bool SetRecvCodecs(const std::vector<DataCodec>& codecs);
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bool sending_;
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bool receiving_;
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std::vector<DataCodec> send_codecs_;
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std::vector<DataCodec> recv_codecs_;
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std::vector<StreamParams> send_streams_;
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std::vector<StreamParams> recv_streams_;
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std::map<uint32_t, RtpClock*> rtp_clock_by_send_ssrc_;
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std::unique_ptr<rtc::DataRateLimiter> send_limiter_;
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};
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} // namespace cricket
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#endif // MEDIA_BASE_RTP_DATA_ENGINE_H_
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