/*
  * 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 "avcodec.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){
     bsf->next = first_bitstream_filter;
     first_bitstream_filter= 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= av_mallocz(bsf->priv_data_size);

             return bsfc;
         }
         bsf= bsf->next;
     }
     return NULL;
 }
 
 void av_bitstream_filter_close(AVBitStreamFilterContext *bsfc){

     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);
 }