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* Copyright 2012, Google Inc.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef TALK_SESSION_PHONE_DATAMEDIAENGINE_H_
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#define TALK_SESSION_PHONE_DATAMEDIAENGINE_H_
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#include "talk/base/timing.h"
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#include "talk/session/phone/mediachannel.h"
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#include "talk/session/phone/mediaengine.h"
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static const int kGoogleDataCodecId = 101;
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static const char kGoogleDataCodecName[] = "google-data";
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class DataEngine : public DataEngineInterface {
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virtual DataMediaChannel* CreateChannel();
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virtual const std::vector<DataCodec>& data_codecs() {
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// Mostly for testing with a fake clock. Ownership is passed in.
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void SetTiming(talk_base::Timing* timing) {
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timing_.reset(timing);
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std::vector<DataCodec> data_codecs_;
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talk_base::scoped_ptr<talk_base::Timing> timing_;
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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 DataMediaChannel::RtpClock {
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RtpClock(int clockrate, uint16 first_seq_num, uint32 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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void Tick(double now, int* seq_num, uint32* timestamp);
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uint32 timestamp_offset_;
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} // namespace cricket
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#endif // TALK_SESSION_PHONE_DATAMEDIAENGINE_H_