*/
#include "avcodec.h"
-#include "mpegaudio.h"
-AVBitStreamFilter *first_bitstream_filter= NULL;
+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;
}
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);
*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;
-}
-
-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;
- int mode_extension;
-
- if(avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
- av_log(avctx, AV_LOG_ERROR, "not standards compliant\n");
- return -1;
- }
-
- header = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
- mode_extension= (header>>4)&3;
-
- if(ff_mpa_check_header(header) < 0 || (header&0x70000) != 0x30000){
- *poutbuf= (uint8_t *) buf;
- *poutbuf_size= buf_size;
-
- av_log(avctx, AV_LOG_INFO, "cannot compress %08X\n", header);
- return 0;
- }
-
- *poutbuf_size= buf_size - 4;
- *poutbuf= av_malloc(buf_size - 4 + FF_INPUT_BUFFER_PADDING_SIZE);
- memcpy(*poutbuf, buf + 4, buf_size - 4 + 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;
-}
-
-static int mp3_header_decompress(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;
- int sample_rate= avctx->sample_rate;
- int sample_rate_index=0;
- int lsf, mpeg25, bitrate_index, frame_size;
-
- header = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
- if(ff_mpa_check_header(header) >= 0){
- *poutbuf= (uint8_t *) buf;
- *poutbuf_size= buf_size;
-
- return 0;
- }
-
- header= 0xFFE00000 | ((4-3)<<17) | (1<<16); //FIXME simplify
-
- lsf = sample_rate < (24000+32000)/2;
- mpeg25 = sample_rate < (12000+16000)/2;
- header |= (!mpeg25)<<20;
- header |= (!lsf )<<19;
- if(sample_rate<<(lsf+mpeg25) < (44100+32000)/2)
- sample_rate_index |= 2;
- else if(sample_rate<<(lsf+mpeg25) > (44100+48000)/2)
- sample_rate_index |= 1;
-
- header |= sample_rate_index<<10;
- sample_rate= mpa_freq_tab[sample_rate_index] >> (lsf + mpeg25); //in case sample rate is a little off
-
- for(bitrate_index=2; bitrate_index<30; bitrate_index++){
- frame_size = mpa_bitrate_tab[lsf][2][bitrate_index>>1];
- frame_size = (frame_size * 144000) / (sample_rate << lsf) + (bitrate_index&1);
- if(frame_size == buf_size + 4)
- break;
- }
- if(bitrate_index == 30){
- av_log(avctx, AV_LOG_ERROR, "couldnt find bitrate_index\n");
- return -1;
- }
-
- header |= (bitrate_index&1)<<9;
- header |= (bitrate_index>>1)<<12;
- header |= (avctx->channels==1 ? MPA_MONO : MPA_JSTEREO)<<6;
-
- *poutbuf_size= buf_size + 4;
- *poutbuf= av_malloc(buf_size + 4 + FF_INPUT_BUFFER_PADDING_SIZE);
- memcpy(*poutbuf + 4, buf, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
-
- if(avctx->channels==2){
- if(lsf){
- FFSWAP(int, (*poutbuf)[5], (*poutbuf)[6]);
- header |= ((*poutbuf)[5] & 0xC0)>>2;
- }else{
- header |= (*poutbuf)[5] & 0x30;
- }
- }
-
- (*poutbuf)[0]= header>>24;
- (*poutbuf)[1]= header>>16;
- (*poutbuf)[2]= header>> 8;
- (*poutbuf)[3]= header ;
-
- return 1;
-}
-
-AVBitStreamFilter dump_extradata_bsf={
- "dump_extra",
- 0,
- dump_extradata,
-};
-
-AVBitStreamFilter remove_extradata_bsf={
- "remove_extra",
- 0,
- remove_extradata,
-};
-
-AVBitStreamFilter noise_bsf={
- "noise",
- sizeof(int),
- noise,
-};
-
-AVBitStreamFilter mp3_header_compress_bsf={
- "mp3comp",
- 0,
- mp3_header_compress,
-};
-
-AVBitStreamFilter mp3_header_decompress_bsf={
- "mp3decomp",
- 0,
- mp3_header_decompress,
-};
projects / ffmpeg / blobdiff