void av_register_output_format(AVOutputFormat *format)
{
AVOutputFormat **p = last_oformat;
format->next = NULL;
while(*p || avpriv_atomic_ptr_cas((void * volatile *)p, NULL, format))
p = &(*p)->next;
last_oformat = &format->next;
}
int bv_device_register(BVDevice * dev)
{
BVDevice **p = last_dev;
dev->next = NULL;
while (*p || avpriv_atomic_ptr_cas((void *volatile *) p, NULL, dev))
p = &(*p)->next;
last_iformat = &dev->next;
}
void av_register_output_format(AVOutputFormat *format)
{
AVOutputFormat **p = last_oformat;
// Note, format could be added after the first 2 checks but that implies that *p is no longer NULL
while(p != &format->next && !format->next && avpriv_atomic_ptr_cas((void * volatile *)p, NULL, format))
p = &(*p)->next;
if (!format->next)
last_oformat = &format->next;
}
int avfilter_register(AVFilter *filter)
{
AVFilter **f = last_filter;
/* the filter must select generic or internal exclusively */
av_assert0((filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE) != AVFILTER_FLAG_SUPPORT_TIMELINE);
filter->next = NULL;
while(*f || avpriv_atomic_ptr_cas((void * volatile *)f, NULL, filter))
f = &(*f)->next;
last_filter = &filter->next;
return 0;
}
int avfilter_register(AVFilter *filter)
{
AVFilter **f = &first_filter;
int i;
/* the filter must select generic or internal exclusively */
av_assert0((filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE) != AVFILTER_FLAG_SUPPORT_TIMELINE);
for(i=0; filter->inputs && filter->inputs[i].name; i++) {
const AVFilterPad *input = &filter->inputs[i];
av_assert0( !input->filter_frame
|| (!input->start_frame && !input->end_frame));
}
filter->next = NULL;
while(avpriv_atomic_ptr_cas((void * volatile *)f, NULL, filter))
f = &(*f)->next;
return 0;
}
void av_register_bitstream_filter(AVBitStreamFilter *bsf)
{
do {
bsf->next = first_bitstream_filter;
} while(bsf->next != avpriv_atomic_ptr_cas((void * volatile *)&first_bitstream_filter, bsf->next, bsf));
}
void av_register_codec_parser(AVCodecParser *parser)
{
do {
parser->next = av_first_parser;
} while (parser->next != avpriv_atomic_ptr_cas((void * volatile *)&av_first_parser, parser->next, parser));
}