yading@10: /*
yading@10:  * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #include <string.h>
yading@10: 
yading@10: #include "avcodec.h"
yading@10: #include "libavutil/mem.h"
yading@10: 
yading@10: static AVBitStreamFilter *first_bitstream_filter= NULL;
yading@10: 
yading@10: AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f){
yading@10:     if(f) return f->next;
yading@10:     else  return first_bitstream_filter;
yading@10: }
yading@10: 
yading@10: void av_register_bitstream_filter(AVBitStreamFilter *bsf){
yading@10:     bsf->next = first_bitstream_filter;
yading@10:     first_bitstream_filter= bsf;
yading@10: }
yading@10: 
yading@10: AVBitStreamFilterContext *av_bitstream_filter_init(const char *name){
yading@10:     AVBitStreamFilter *bsf= first_bitstream_filter;
yading@10: 
yading@10:     while(bsf){
yading@10:         if(!strcmp(name, bsf->name)){
yading@10:             AVBitStreamFilterContext *bsfc= av_mallocz(sizeof(AVBitStreamFilterContext));
yading@10:             bsfc->filter= bsf;
yading@10:             bsfc->priv_data = bsf->priv_data_size ? av_mallocz(bsf->priv_data_size) : NULL;
yading@10:             return bsfc;
yading@10:         }
yading@10:         bsf= bsf->next;
yading@10:     }
yading@10:     return NULL;
yading@10: }
yading@10: 
yading@10: void av_bitstream_filter_close(AVBitStreamFilterContext *bsfc){
yading@10:     if(bsfc->filter->close)
yading@10:         bsfc->filter->close(bsfc);
yading@10:     av_freep(&bsfc->priv_data);
yading@10:     av_parser_close(bsfc->parser);
yading@10:     av_free(bsfc);
yading@10: }
yading@10: 
yading@10: int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
yading@10:                                AVCodecContext *avctx, const char *args,
yading@10:                      uint8_t **poutbuf, int *poutbuf_size,
yading@10:                      const uint8_t *buf, int buf_size, int keyframe){
yading@10:     *poutbuf= (uint8_t *) buf;
yading@10:     *poutbuf_size= buf_size;
yading@10:     return bsfc->filter->filter(bsfc, avctx, args, poutbuf, poutbuf_size, buf, buf_size, keyframe);
yading@10: }