X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fbitstream_filter.c;h=ee56174b2c9f11a616bce6a330e6f9e6422cc3ae;hb=ad0e31f1346bacdb04341a07375ff597dea8b2e2;hp=89fc4e17599ea709aa8941425bbfbbe36e54f7b5;hpb=fead30d4440bc7b75006ae60f2742c63a05168b3;p=ffmpeg diff --git a/libavcodec/bitstream_filter.c b/libavcodec/bitstream_filter.c index 89fc4e17599..ee56174b2c9 100644 --- a/libavcodec/bitstream_filter.c +++ b/libavcodec/bitstream_filter.c @@ -1,27 +1,31 @@ /* * copyright (c) 2006 Michael Niedermayer * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * Libav 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, + * Libav 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 + * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #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; @@ -35,7 +39,7 @@ AVBitStreamFilterContext *av_bitstream_filter_init(const char *name){ if(!strcmp(name, bsf->name)){ AVBitStreamFilterContext *bsfc= av_mallocz(sizeof(AVBitStreamFilterContext)); bsfc->filter= bsf; - bsfc->priv_data= av_mallocz(bsf->priv_data_size); + bsfc->priv_data = bsf->priv_data_size ? av_mallocz(bsf->priv_data_size) : NULL; return bsfc; } bsf= bsf->next; @@ -44,6 +48,8 @@ AVBitStreamFilterContext *av_bitstream_filter_init(const char *name){ } 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); @@ -57,228 +63,3 @@ int av_bitstream_filter_filter(AVBitStreamFilterContext *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; istrict_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; -} - -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 = AV_RB32(buf); - if(ff_mpa_check_header(header) >= 0){ - *poutbuf= (uint8_t *) buf; - *poutbuf_size= buf_size; - - return 0; - } - - if(avctx->extradata_size != 15 || strcmp(avctx->extradata, "FFCMP3 0.0")){ - av_log(avctx, AV_LOG_ERROR, "Extradata invalid %d\n", avctx->extradata_size); - return -1; - } - - header= AV_RB32(avctx->extradata+11) & MP3_MASK; - - lsf = sample_rate < (24000+32000)/2; - mpeg25 = sample_rate < (12000+16000)/2; - sample_rate_index= (header>>10)&3; - 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(frame_size == buf_size + 6) - 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 |= (frame_size == buf_size + 4)<<16; //FIXME actually set a correct crc instead of 0 - - *poutbuf_size= frame_size; - *poutbuf= av_malloc(frame_size + FF_INPUT_BUFFER_PADDING_SIZE); - memcpy(*poutbuf + frame_size - buf_size, buf, buf_size + FF_INPUT_BUFFER_PADDING_SIZE); - - if(avctx->channels==2){ - uint8_t *p= *poutbuf + frame_size - buf_size; - if(lsf){ - FFSWAP(int, p[1], p[2]); - header |= (p[1] & 0xC0)>>2; - p[1] &= 0x3F; - }else{ - header |= p[1] & 0x30; - p[1] &= 0xCF; - } - } - - (*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, -};