- 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);
-}
-
-static int dump_extradata(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
- uint8_t **poutbuf, int *poutbuf_size,
- const uint8_t *buf, int buf_size, int keyframe){
- int cmd= args ? *args : 0;
- /* cast to avoid warning about discarding qualifiers */
- if(avctx->extradata){
- if( (keyframe && (avctx->flags2 & CODEC_FLAG2_LOCAL_HEADER) && cmd=='a')
- ||(keyframe && (cmd=='k' || !cmd))
- ||(cmd=='e')
- /*||(? && (s->flags & PARSER_FLAG_DUMP_EXTRADATA_AT_BEGIN)*/){
- int size= buf_size + avctx->extradata_size;
- *poutbuf_size= size;
- *poutbuf= av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
-
- memcpy(*poutbuf, avctx->extradata, avctx->extradata_size);
- memcpy((*poutbuf) + avctx->extradata_size, buf, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
- return 1;
- }
- }
- return 0;
-}
-
-static int remove_extradata(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
- uint8_t **poutbuf, int *poutbuf_size,
- const uint8_t *buf, int buf_size, int keyframe){
- int cmd= args ? *args : 0;
- AVCodecParserContext *s;
-
- if(!bsfc->parser){
- bsfc->parser= av_parser_init(avctx->codec_id);
- }
- s= bsfc->parser;
-
- if(s && s->parser->split){
- if( (((avctx->flags & CODEC_FLAG_GLOBAL_HEADER) || (avctx->flags2 & CODEC_FLAG2_LOCAL_HEADER)) && cmd=='a')
- ||(!keyframe && cmd=='k')
- ||(cmd=='e' || !cmd)
- ){
- int i= s->parser->split(avctx, buf, buf_size);
- buf += i;
- buf_size -= i;
- }
- }
- *poutbuf= (uint8_t *) buf;
- *poutbuf_size= buf_size;
-
- return 0;
-}
-
-static int noise(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
- uint8_t **poutbuf, int *poutbuf_size,
- const uint8_t *buf, int buf_size, int keyframe){
- int amount= args ? atoi(args) : 10000;
- unsigned int *state= bsfc->priv_data;
- int i;
-
- *poutbuf= av_malloc(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
-
- memcpy(*poutbuf, buf, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
- for(i=0; i<buf_size; i++){
- (*state) += (*poutbuf)[i] + 1;
- if(*state % amount == 0)
- (*poutbuf)[i] = *state;
- }
- return 1;
-}
-
-#define MP3_MASK 0xFFFE0CCF
-
-static int mp3_header_compress(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
- uint8_t **poutbuf, int *poutbuf_size,
- const uint8_t *buf, int buf_size, int keyframe){
- uint32_t header, extraheader;
- int mode_extension, header_size;
-
- if(avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
- av_log(avctx, AV_LOG_ERROR, "not standards compliant\n");
- return -1;
- }
-
- header = AV_RB32(buf);
- mode_extension= (header>>4)&3;
-
- if(ff_mpa_check_header(header) < 0 || (header&0x60000) != 0x20000){
-output_unchanged:
- *poutbuf= (uint8_t *) buf;
- *poutbuf_size= buf_size;
-
- av_log(avctx, AV_LOG_INFO, "cannot compress %08X\n", header);
- return 0;
- }
-
- if(avctx->extradata_size == 0){
- avctx->extradata_size=15;
- avctx->extradata= av_malloc(avctx->extradata_size);
- strcpy(avctx->extradata, "FFCMP3 0.0");
- memcpy(avctx->extradata+11, buf, 4);
- }
- if(avctx->extradata_size != 15){
- av_log(avctx, AV_LOG_ERROR, "Extradata invalid\n");
- return -1;
- }
- extraheader = AV_RB32(avctx->extradata+11);
- if((extraheader&MP3_MASK) != (header&MP3_MASK))
- goto output_unchanged;
-
- header_size= (header&0x10000) ? 4 : 6;
-
- *poutbuf_size= buf_size - header_size;
- *poutbuf= av_malloc(buf_size - header_size + FF_INPUT_BUFFER_PADDING_SIZE);
- memcpy(*poutbuf, buf + header_size, buf_size - header_size + FF_INPUT_BUFFER_PADDING_SIZE);
-
- if(avctx->channels==2){
- if((header & (3<<19)) != 3<<19){
- (*poutbuf)[1] &= 0x3F;
- (*poutbuf)[1] |= mode_extension<<6;
- FFSWAP(int, (*poutbuf)[1], (*poutbuf)[2]);
- }else{
- (*poutbuf)[1] &= 0x8F;
- (*poutbuf)[1] |= mode_extension<<4;
- }
- }
-
- return 1;