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/**
* Copyright (c) 2020 Filip Klembara (in2core)
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/.
*/
#ifndef RTC_H264_RTP_PACKETIZER_H
#define RTC_H264_RTP_PACKETIZER_H
#if RTC_ENABLE_MEDIA
#include "mediahandlerrootelement.hpp"
#include "nalunit.hpp"
#include "rtppacketizer.hpp"
namespace rtc {
/// RTP packetization of h264 payload
class RTC_CPP_EXPORT H264RtpPacketizer final : public RtpPacketizer,
public MediaHandlerRootElement {
shared_ptr<NalUnits> splitMessage(binary_ptr message);
const uint16_t maximumFragmentSize;
public:
/// Default clock rate for H264 in RTP
inline static const uint32_t defaultClockRate = 90 * 1000;
/// NAL unit separator
enum class Separator {
Length = RTC_NAL_SEPARATOR_LENGTH, // first 4 bytes are NAL unit length
LongStartSequence = RTC_NAL_SEPARATOR_LONG_START_SEQUENCE, // 0x00, 0x00, 0x00, 0x01
ShortStartSequence = RTC_NAL_SEPARATOR_SHORT_START_SEQUENCE, // 0x00, 0x00, 0x01
StartSequence = RTC_NAL_SEPARATOR_START_SEQUENCE, // LongStartSequence or ShortStartSequence
};
H264RtpPacketizer(H264RtpPacketizer::Separator separator,
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(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 /* RTC_H264_RTP_PACKETIZER_H */