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