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/*
* libdatachannel streamer example
* Copyright (c) 2020 Filip Klembara (in2core)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef H264_RTP_PACKETIZER_H
#define H264_RTP_PACKETIZER_H
#if RTC_ENABLE_MEDIA
#include "nalunit.hpp"
#include "rtppacketizer.hpp"
#include "mediahandlerrootelement.hpp"
namespace rtc {
/// RTP packetization of h264 payload
class RTC_CPP_EXPORT H264RtpPacketizer : public RtpPacketizer, public MediaHandlerRootElement {
std::shared_ptr<NalUnits> splitMessage(binary_ptr message);
const uint16_t maximumFragmentSize;
public:
/// Default clock rate for H264 in RTP
static const auto defaultClockRate = 90 * 1000;
/// Nalunit separator
enum class Separator {
LongStartSequence, // 0x00, 0x00, 0x00, 0x01
ShortStartSequence, // 0x00, 0x00, 0x01
StartSequence, // LongStartSequence or ShortStartSequence
Length // first 4 bytes is nal unit length
};
H264RtpPacketizer(H264RtpPacketizer::Separator separator, std::shared_ptr<RtpPacketizationConfig> rtpConfig,
uint16_t maximumFragmentSize = NalUnits::defaultMaximumFragmentSize);
/// Constructs h264 payload packetizer with given RTP configuration.
/// @note RTP configuration is used in packetization process which may change some configuration
/// properties such as sequence number.
/// @param rtpConfig RTP configuration
/// @param maximumFragmentSize maximum size of one NALU fragment
H264RtpPacketizer(std::shared_ptr<RtpPacketizationConfig> rtpConfig,
uint16_t maximumFragmentSize = NalUnits::defaultMaximumFragmentSize);
ChainedOutgoingProduct processOutgoingBinaryMessage(ChainedMessagesProduct messages, message_ptr control) override;
private:
const Separator separator;
};
} // namespace rtc
#endif /* RTC_ENABLE_MEDIA */
#endif /* H264_RTP_PACKETIZER_H */