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82 lines
2.6 KiB
82 lines
2.6 KiB
/*****************************************************************************
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* rtp3551.h: RTP Profile for Audio and Video
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*****************************************************************************
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* Copyright (C) 2013 VideoLAN
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*
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* Authors: Benjamin Cohen <bencoh@notk.org>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject
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* to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*****************************************************************************/
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/*
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* Normative references:
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* - IETF RFC 3551 RTP Profile for Audio and Video Conferences
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* with Minimal Control (July 2003)
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*/
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#ifndef __BITSTREAM_IETF_RTP3551_H__
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#define __BITSTREAM_IETF_RTP3551_H__
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#include <stdint.h> /* uint8_t, uint16_t, etc... */
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#include "rtp.h"
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#define RTP_TYPE_GSM 3
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#define RTP_TYPE_L16 10
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#define RTP_TYPE_L16MONO 11
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#define RTP_TYPE_MPA 14
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#define RTP_TYPE_MPV 32
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static inline uint32_t rtp_3551_get_clock_rate(uint8_t i_type)
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{
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/* rtp type is a 7bit positive integer, thus 0xff is invalid */
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struct {
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uint8_t i_type;
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uint32_t i_rate;
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} profiles[] = {
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{ RTP_TYPE_TS, 90000 },
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{ RTP_TYPE_MPA, 90000 },
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{ RTP_TYPE_MPV, 90000 },
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{ RTP_TYPE_L16, 44100 },
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{ RTP_TYPE_L16MONO, 44100 },
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{ RTP_TYPE_GSM, 8000 },
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{ 0xff, 0xffff}
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};
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int i = 0;
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while(profiles[i].i_type != 0xff) {
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if (i_type == profiles[i].i_type) {
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return profiles[i].i_rate;
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}
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i++;
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}
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return 0; /* invalid clock rate for unknown type */
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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