AVBitStreamFilter *first_bitstream_filter= NULL;
+AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f){
+ if(f) return f->next;
+ else return first_bitstream_filter;
+}
+
void av_register_bitstream_filter(AVBitStreamFilter *bsf){
bsf->next = first_bitstream_filter;
first_bitstream_filter= bsf;