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/*
* libjingle
* Copyright 2012 Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TALK_MEDIA_BASE_RTPDATAENGINE_H_
#define TALK_MEDIA_BASE_RTPDATAENGINE_H_
#include <string>
#include <vector>
#include "talk/media/base/constants.h"
#include "talk/media/base/mediachannel.h"
#include "talk/media/base/mediaengine.h"
#include "webrtc/base/timing.h"
namespace cricket {
struct DataCodec;
class RtpDataEngine : public DataEngineInterface {
public:
RtpDataEngine();
virtual DataMediaChannel* CreateChannel(DataChannelType data_channel_type);
virtual const std::vector<DataCodec>& data_codecs() {
return data_codecs_;
}
// Mostly for testing with a fake clock. Ownership is passed in.
void SetTiming(rtc::Timing* timing) {
timing_.reset(timing);
}
private:
std::vector<DataCodec> data_codecs_;
rtc::scoped_ptr<rtc::Timing> timing_;
};
// 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 {
public:
RtpClock(int clockrate, uint16_t first_seq_num, uint32_t timestamp_offset)
: clockrate_(clockrate),
last_seq_num_(first_seq_num),
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);
private:
int clockrate_;
uint16_t last_seq_num_;
uint32_t timestamp_offset_;
};
class RtpDataMediaChannel : public DataMediaChannel {
public:
// Timing* Used for the RtpClock
explicit RtpDataMediaChannel(rtc::Timing* timing);
// Sets Timing == NULL, so you'll need to call set_timer() before
// using it. This is needed by FakeMediaEngine.
RtpDataMediaChannel();
virtual ~RtpDataMediaChannel();
void set_timing(rtc::Timing* timing) {
timing_ = timing;
}
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::Buffer* packet,
const rtc::PacketTime& packet_time);
virtual void OnRtcpReceived(rtc::Buffer* packet,
const rtc::PacketTime& packet_time) {}
virtual void OnReadyToSend(bool ready) {}
virtual bool SendData(
const SendDataParams& params,
const rtc::Buffer& payload,
SendDataResult* result);
private:
void Construct(rtc::Timing* timing);
bool SetMaxSendBandwidth(int bps);
bool SetSendCodecs(const std::vector<DataCodec>& codecs);
bool SetRecvCodecs(const std::vector<DataCodec>& codecs);
bool sending_;
bool receiving_;
rtc::Timing* timing_;
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_;
rtc::scoped_ptr<rtc::RateLimiter> send_limiter_;
};
} // namespace cricket
#endif // TALK_MEDIA_BASE_RTPDATAENGINE_H_
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