/* * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include <string.h> #include "avcodec.h" #include "libavutil/atomic.h" #include "libavutil/mem.h" static 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) { 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; 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; } return NULL; } void av_bitstream_filter_close(AVBitStreamFilterContext *bsfc) { if (!bsfc) return; if (bsfc->filter->close) bsfc->filter->close(bsfc); av_freep(&bsfc->priv_data); av_parser_close(bsfc->parser); av_free(bsfc); } int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int keyframe) { *poutbuf = (uint8_t *)buf; *poutbuf_size = buf_size; return bsfc->filter->filter(bsfc, avctx, args, poutbuf, poutbuf_size, buf, buf_size, keyframe); }