mirror of
https://github.com/outbackdingo/UltraGrid.git
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17f50eede2
Send same RTP timestamps for audio/video frames captured at the same time. RTP specification allows this (although doesn't require - according to the spec, the RTP timestamps should colaesce with RTCP NTP correspondence). We slightly modify that in a way that we use for both audio and video 90 kHz clock resolution, so if the start point is the same (random), the RTP timestamps will be exactly the same for related data. Implemented for vidcap DeckLink and testcard.
115 lines
3.8 KiB
C++
115 lines
3.8 KiB
C++
/*
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* FILE: tv.h
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* AUTHOR: Colin Perkins <csp@csperkins.org>
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* MODIFIED: Ladan Gharai <ladan@isi.edu>
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*
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* Copyright (c) 2001-2003 University of Southern California
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* Copyright (c) 2005-2023 CESNET z.s.p.o.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, is permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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*
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* This product includes software developed by the University of Southern
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* California Information Sciences Institute.
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*
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* 4. Neither the name of the University nor of the Institute may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef TV_H_8332A958_38EB_4FE7_94E6_22C71BECD013
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#define TV_H_8332A958_38EB_4FE7_94E6_22C71BECD013
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#ifdef __cplusplus
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#include <cstdint>
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#include <ctime>
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#else
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#include <stdint.h>
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#include <time.h>
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#endif
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#ifndef _MSC_VER
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#include <sys/time.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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uint32_t get_local_mediatime_offset(void);
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uint32_t get_local_mediatime(void);
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void ts_add_nsec(struct timespec *ts, long long offset);
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double tv_diff(struct timeval curr_time, struct timeval prev_time);
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uint32_t tv_diff_usec(struct timeval curr_time, struct timeval prev_time);
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void tv_add(struct timeval *ts, double offset_secs);
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void tv_add_usec(struct timeval *ts, long long offset);
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int tv_gt(struct timeval a, struct timeval b);
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uint32_t get_std_audio_local_mediatime(double samples, int rate);
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uint32_t get_std_video_local_mediatime(void);
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typedef long long time_ns_t;
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#define MS_IN_NS_DBL 1000000.0
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#define MS_IN_SEC 1000
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#define MS_IN_SEC_DBL 1000.0
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#define US_IN_SEC 1000000LL
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#define US_IN_NS 1000LL
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#define US_IN_SEC_DBL ((double) US_IN_SEC)
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#define NS_IN_MS 1000000LL
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#define NS_IN_MS_DBL 1E6
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#define NS_IN_SEC 1000000000LL
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#define NS_IN_SEC_DBL ((double) NS_IN_SEC)
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#define NS_IN_US (NS_IN_SEC/US_IN_SEC)
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#define NS_IN_US_DBL ((double) NS_IN_US)
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static inline time_ns_t get_time_in_ns() {
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#ifdef HAVE_TIMESPEC_GET
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struct timespec ts = { 0, 0 };
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timespec_get(&ts, TIME_UTC);
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return ts.tv_sec * NS_IN_SEC + ts.tv_nsec;
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#else
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struct timeval tv = { 0, 0 };
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gettimeofday(&tv, NULL);
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return tv.tv_sec * NS_IN_SEC + tv.tv_usec * NS_IN_US;
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#endif
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}
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// old macOS compat
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#if !defined HAVE_TIMESPEC_GET
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#ifndef TIME_UTC
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#define TIME_UTC 1
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#endif
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int timespec_get(struct timespec *ts, int base);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif // ! defined TV_H_8332A958_38EB_4FE7_94E6_22C71BECD013
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