forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
103 lines
4.0 KiB
103 lines
4.0 KiB
/* |
|
Copyright (c) 2012, Broadcom Europe Ltd |
|
All rights reserved. |
|
|
|
Redistribution and use in source and binary forms, with or without |
|
modification, are permitted provided that the following conditions are met: |
|
* Redistributions of source code must retain the above copyright |
|
notice, this list of conditions and the following disclaimer. |
|
* Redistributions in binary form must reproduce the above copyright |
|
notice, this list of conditions and the following disclaimer in the |
|
documentation and/or other materials provided with the distribution. |
|
* Neither the name of the copyright holder nor the |
|
names of its contributors may be used to endorse or promote products |
|
derived from this software without specific prior written permission. |
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
|
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
|
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
|
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY |
|
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
|
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
|
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
|
*/ |
|
#ifndef VC_CONTAINERS_TIME_H |
|
#define VC_CONTAINERS_TIME_H |
|
|
|
/** \file |
|
* Utility functions to help with timestamping of elementary stream frames |
|
*/ |
|
|
|
typedef struct VC_CONTAINER_TIME_T |
|
{ |
|
uint32_t samplerate_num; |
|
uint32_t samplerate_den; |
|
uint32_t time_base; |
|
|
|
uint32_t remainder; |
|
|
|
int64_t time; |
|
|
|
} VC_CONTAINER_TIME_T; |
|
|
|
/*****************************************************************************/ |
|
STATIC_INLINE void vc_container_time_init( VC_CONTAINER_TIME_T *time, uint32_t time_base ) |
|
{ |
|
time->samplerate_num = 0; |
|
time->samplerate_den = 0; |
|
time->remainder = 0; |
|
time->time_base = time_base; |
|
time->time = VC_CONTAINER_TIME_UNKNOWN; |
|
} |
|
|
|
/*****************************************************************************/ |
|
STATIC_INLINE int64_t vc_container_time_get( VC_CONTAINER_TIME_T *time ) |
|
{ |
|
if (time->time == VC_CONTAINER_TIME_UNKNOWN || !time->samplerate_num || !time->samplerate_den) |
|
return VC_CONTAINER_TIME_UNKNOWN; |
|
return time->time + time->remainder * (int64_t)time->time_base * time->samplerate_den / time->samplerate_num; |
|
} |
|
|
|
/*****************************************************************************/ |
|
STATIC_INLINE void vc_container_time_set_samplerate( VC_CONTAINER_TIME_T *time, uint32_t samplerate_num, uint32_t samplerate_den ) |
|
{ |
|
if(time->samplerate_num == samplerate_num && |
|
time->samplerate_den == samplerate_den) |
|
return; |
|
|
|
/* We're changing samplerate, we need to reset our remainder */ |
|
if(time->remainder) |
|
time->time = vc_container_time_get( time ); |
|
time->remainder = 0; |
|
time->samplerate_num = samplerate_num; |
|
time->samplerate_den = samplerate_den; |
|
} |
|
|
|
/*****************************************************************************/ |
|
STATIC_INLINE void vc_container_time_set( VC_CONTAINER_TIME_T *time, int64_t new_time ) |
|
{ |
|
if (new_time == VC_CONTAINER_TIME_UNKNOWN) |
|
return; |
|
time->remainder = 0; |
|
time->time = new_time; |
|
} |
|
|
|
/*****************************************************************************/ |
|
STATIC_INLINE int64_t vc_container_time_add( VC_CONTAINER_TIME_T *time, uint32_t samples ) |
|
{ |
|
uint32_t increment; |
|
|
|
if (time->time == VC_CONTAINER_TIME_UNKNOWN || !time->samplerate_num || !time->samplerate_den) |
|
return VC_CONTAINER_TIME_UNKNOWN; |
|
|
|
samples += time->remainder; |
|
increment = samples * time->samplerate_den / time->samplerate_num; |
|
time->time += increment * time->time_base; |
|
time->remainder = samples - increment * time->samplerate_num / time->samplerate_den; |
|
return vc_container_time_get(time); |
|
} |
|
|
|
#endif /* VC_CONTAINERS_TIME_H */
|
|
|