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rtp: add SAP parsing

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This commit is contained in:
Wim Taymans 2022-10-04 13:19:14 +02:00
parent d21fc6f378
commit 38f908e758
3 changed files with 226 additions and 54 deletions
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78
src/modules/module-rtp/rtp.h Normal file
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/* PipeWire
*
* Copyright © 2022 Wim Taymans <wim.taymans@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef PIPEWIRE_RTP_H
#define PIPEWIRE_RTP_H
#ifdef __cplusplus
extern "C" {
#endif
struct rtp_header {
#if __BYTE_ORDER == __LITTLE_ENDIAN
unsigned cc:4;
unsigned x:1;
unsigned p:1;
unsigned v:2;
unsigned pt:7;
unsigned m:1;
#elif __BYTE_ORDER == __BIG_ENDIAN
unsigned v:2;
unsigned p:1;
unsigned x:1;
unsigned cc:4;
unsigned m:1;
unsigned pt:7;
#else
#error "Unknown byte order"
#endif
uint16_t sequence_number;
uint32_t timestamp;
uint32_t ssrc;
uint32_t csrc[0];
} __attribute__ ((packed));
struct rtp_payload {
#if __BYTE_ORDER == __LITTLE_ENDIAN
unsigned frame_count:4;
unsigned rfa0:1;
unsigned is_last_fragment:1;
unsigned is_first_fragment:1;
unsigned is_fragmented:1;
#elif __BYTE_ORDER == __BIG_ENDIAN
unsigned is_fragmented:1;
unsigned is_first_fragment:1;
unsigned is_last_fragment:1;
unsigned rfa0:1;
unsigned frame_count:4;
#endif
} __attribute__ ((packed));
#ifdef __cplusplus
}
#endif
#endif /* PIPEWIRE_RTP_H */