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57 lines
2.4 KiB
C
57 lines
2.4 KiB
C
/*****************************************************************************
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# #
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# uStreamer - Lightweight and fast MJPEG-HTTP streamer. #
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# #
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# This source file is partially based on this code: #
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# - https://github.com/catid/kvm/blob/master/kvm_pipeline/src #
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# #
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# Copyright (C) 2018-2022 Maxim Devaev <mdevaev@gmail.com> #
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# #
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# This program is free software: you can redistribute it and/or modify #
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# it under the terms of the GNU General Public License as published by #
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# the Free Software Foundation, either version 3 of the License, or #
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# (at your option) any later version. #
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# #
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# This program is distributed in the hope that it will be useful, #
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# but WITHOUT ANY WARRANTY; without even the implied warranty of #
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
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# GNU General Public License for more details. #
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# #
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# You should have received a copy of the GNU General Public License #
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# along with this program. If not, see <https://www.gnu.org/licenses/>. #
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# #
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*****************************************************************************/
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#include "rtp.h"
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rtp_s *rtp_init(unsigned payload, bool video) {
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rtp_s *rtp;
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A_CALLOC(rtp, 1);
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rtp->payload = payload;
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rtp->video = video;
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rtp->ssrc = triple_u32(get_now_monotonic_u64());
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return rtp;
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}
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void rtp_destroy(rtp_s *rtp) {
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free(rtp);
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}
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void rtp_write_header(rtp_s *rtp, uint32_t pts, bool marked) {
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uint32_t word0 = 0x80000000;
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if (marked) {
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word0 |= 1 << 23;
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}
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word0 |= (rtp->payload & 0x7F) << 16;
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word0 |= rtp->seq;
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++rtp->seq;
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# define WRITE_BE_U32(_offset, _value) *((uint32_t *)(rtp->datagram + _offset)) = __builtin_bswap32(_value)
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WRITE_BE_U32(0, word0);
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WRITE_BE_U32(4, pts);
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WRITE_BE_U32(8, rtp->ssrc);
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# undef WRITE_BE_U32
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}
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