#include <string.h>
#include "avcodec.h"
+#include "libavutil/atomic.h"
#include "libavutil/mem.h"
- static AVBitStreamFilter *first_bitstream_filter= NULL;
+ static AVBitStreamFilter *first_bitstream_filter = NULL;
- AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f){
- if(f) return f->next;
- else return first_bitstream_filter;
+ AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f)
+ {
+ if (f)
+ return f->next;
+ else
+ return first_bitstream_filter;
}
- void av_register_bitstream_filter(AVBitStreamFilter *bsf){
+ void av_register_bitstream_filter(AVBitStreamFilter *bsf)
+ {
- bsf->next = first_bitstream_filter;
- first_bitstream_filter = bsf;
+ do {
+ bsf->next = first_bitstream_filter;
+ } while(bsf->next != avpriv_atomic_ptr_cas((void * volatile *)&first_bitstream_filter, bsf->next, bsf));
}
- AVBitStreamFilterContext *av_bitstream_filter_init(const char *name){
- AVBitStreamFilter *bsf= first_bitstream_filter;
+ AVBitStreamFilterContext *av_bitstream_filter_init(const char *name)
+ {
+ AVBitStreamFilter *bsf = first_bitstream_filter;
- while(bsf){
- if(!strcmp(name, bsf->name)){
- AVBitStreamFilterContext *bsfc= av_mallocz(sizeof(AVBitStreamFilterContext));
- bsfc->filter= bsf;
- bsfc->priv_data = bsf->priv_data_size ? av_mallocz(bsf->priv_data_size) : NULL;
+ while (bsf) {
+ if (!strcmp(name, bsf->name)) {
+ AVBitStreamFilterContext *bsfc =
+ av_mallocz(sizeof(AVBitStreamFilterContext));
+ bsfc->filter = bsf;
+ bsfc->priv_data =
+ bsf->priv_data_size ? av_mallocz(bsf->priv_data_size) : NULL;
return bsfc;
}
- bsf= bsf->next;
+ bsf = bsf->next;
}
return NULL;
}
- void av_bitstream_filter_close(AVBitStreamFilterContext *bsfc){
+ void av_bitstream_filter_close(AVBitStreamFilterContext *bsfc)
+ {
+ if (!bsfc)
+ return;
- if(bsfc->filter->close)
+ if (bsfc->filter->close)
bsfc->filter->close(bsfc);
av_freep(&bsfc->priv_data);
av_parser_close(bsfc->parser);