diff options
Diffstat (limited to 'lib/info.c')
| -rw-r--r-- | lib/info.c | 588 |
1 files changed, 0 insertions, 588 deletions
diff --git a/lib/info.c b/lib/info.c deleted file mode 100644 index 4aa11a28..00000000 --- a/lib/info.c +++ /dev/null @@ -1,588 +0,0 @@ -/******************************************************************** - * * - * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * - * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * - * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001 * - * by the XIPHOPHORUS Company http://www.xiph.org/ * - - ******************************************************************** - - function: maintain the info structure, info <-> header packets - last mod: $Id: info.c,v 1.42 2001/08/13 01:36:57 xiphmont Exp $ - - ********************************************************************/ - -/* general handling of the header and the vorbis_info structure (and - substructures) */ - -#include <stdlib.h> -#include <string.h> -#include <ctype.h> -#include <ogg/ogg.h> -#include "vorbis/codec.h" -#include "codec_internal.h" -#include "codebook.h" -#include "registry.h" -#include "window.h" -#include "psy.h" -#include "misc.h" -#include "os.h" - -/* helpers */ -static int ilog2(unsigned int v){ - int ret=0; - while(v>1){ - ret++; - v>>=1; - } - return(ret); -} - -static void _v_writestring(oggpack_buffer *o,char *s){ - while(*s){ - oggpack_write(o,*s++,8); - } -} - -static void _v_readstring(oggpack_buffer *o,char *buf,int bytes){ - while(bytes--){ - *buf++=oggpack_read(o,8); - } -} - -void vorbis_comment_init(vorbis_comment *vc){ - memset(vc,0,sizeof(vorbis_comment)); -} - -void vorbis_comment_add(vorbis_comment *vc,char *comment){ - vc->user_comments=_ogg_realloc(vc->user_comments, - (vc->comments+2)*sizeof(char *)); - vc->comment_lengths=_ogg_realloc(vc->comment_lengths, - (vc->comments+2)*sizeof(int)); - vc->user_comments[vc->comments]=strdup(comment); - vc->comment_lengths[vc->comments]=strlen(comment); - vc->comments++; - vc->user_comments[vc->comments]=NULL; -} - -void vorbis_comment_add_tag(vorbis_comment *vc, char *tag, char *contents){ - char *comment=alloca(strlen(tag)+strlen(contents)+2); /* +2 for = and \0 */ - strcpy(comment, tag); - strcat(comment, "="); - strcat(comment, contents); - vorbis_comment_add(vc, comment); -} - -/* This is more or less the same as strncasecmp - but that doesn't exist - * everywhere, and this is a fairly trivial function, so we include it */ -static int tagcompare(const char *s1, const char *s2, int n){ - int c=0; - while(c < n){ - if(toupper(s1[c]) != toupper(s2[c])) - return !0; - c++; - } - return 0; -} - -char *vorbis_comment_query(vorbis_comment *vc, char *tag, int count){ - long i; - int found = 0; - int taglen = strlen(tag)+1; /* +1 for the = we append */ - char *fulltag = alloca(taglen+ 1); - - strcpy(fulltag, tag); - strcat(fulltag, "="); - - for(i=0;i<vc->comments;i++){ - if(!tagcompare(vc->user_comments[i], fulltag, taglen)){ - if(count == found) - /* We return a pointer to the data, not a copy */ - return vc->user_comments[i] + taglen; - else - found++; - } - } - return NULL; /* didn't find anything */ -} - -int vorbis_comment_query_count(vorbis_comment *vc, char *tag){ - int i,count=0; - int taglen = strlen(tag)+1; /* +1 for the = we append */ - char *fulltag = alloca(taglen+1); - strcpy(fulltag,tag); - strcat(fulltag, "="); - - for(i=0;i<vc->comments;i++){ - if(!tagcompare(vc->user_comments[i], fulltag, taglen)) - count++; - } - - return count; -} - -void vorbis_comment_clear(vorbis_comment *vc){ - if(vc){ - long i; - for(i=0;i<vc->comments;i++) - if(vc->user_comments[i])_ogg_free(vc->user_comments[i]); - if(vc->user_comments)_ogg_free(vc->user_comments); - if(vc->comment_lengths)_ogg_free(vc->comment_lengths); - if(vc->vendor)_ogg_free(vc->vendor); - } - memset(vc,0,sizeof(vorbis_comment)); -} - -/* used by synthesis, which has a full, alloced vi */ -void vorbis_info_init(vorbis_info *vi){ - memset(vi,0,sizeof(vorbis_info)); - vi->codec_setup=_ogg_calloc(1,sizeof(codec_setup_info)); -} - -void vorbis_info_clear(vorbis_info *vi){ - codec_setup_info *ci=vi->codec_setup; - int i; - - if(ci){ - - for(i=0;i<ci->modes;i++) - if(ci->mode_param[i])_ogg_free(ci->mode_param[i]); - - for(i=0;i<ci->maps;i++) /* unpack does the range checking */ - _mapping_P[ci->map_type[i]]->free_info(ci->map_param[i]); - - for(i=0;i<ci->times;i++) /* unpack does the range checking */ - _time_P[ci->time_type[i]]->free_info(ci->time_param[i]); - - for(i=0;i<ci->floors;i++) /* unpack does the range checking */ - _floor_P[ci->floor_type[i]]->free_info(ci->floor_param[i]); - - for(i=0;i<ci->residues;i++) /* unpack does the range checking */ - _residue_P[ci->residue_type[i]]->free_info(ci->residue_param[i]); - - for(i=0;i<ci->books;i++){ - if(ci->book_param[i]){ - /* knows if the book was not alloced */ - vorbis_staticbook_destroy(ci->book_param[i]); - } - } - - for(i=0;i<ci->psys;i++) - _vi_psy_free(ci->psy_param[i]); - - _ogg_free(ci); - } - - memset(vi,0,sizeof(vorbis_info)); -} - -/* Header packing/unpacking ********************************************/ - -static int _vorbis_unpack_info(vorbis_info *vi,oggpack_buffer *opb){ - codec_setup_info *ci=vi->codec_setup; - if(!ci)return(OV_EFAULT); - - vi->version=oggpack_read(opb,32); - if(vi->version!=0)return(OV_EVERSION); - - vi->channels=oggpack_read(opb,8); - vi->rate=oggpack_read(opb,32); - - vi->bitrate_upper=oggpack_read(opb,32); - vi->bitrate_nominal=oggpack_read(opb,32); - vi->bitrate_lower=oggpack_read(opb,32); - - ci->blocksizes[0]=1<<oggpack_read(opb,4); - ci->blocksizes[1]=1<<oggpack_read(opb,4); - - if(vi->rate<1)goto err_out; - if(vi->channels<1)goto err_out; - if(ci->blocksizes[0]<8)goto err_out; - if(ci->blocksizes[1]<ci->blocksizes[0])goto err_out; - - if(oggpack_read(opb,1)!=1)goto err_out; /* EOP check */ - - return(0); - err_out: - vorbis_info_clear(vi); - return(OV_EBADHEADER); -} - -static int _vorbis_unpack_comment(vorbis_comment *vc,oggpack_buffer *opb){ - int i; - int vendorlen=oggpack_read(opb,32); - if(vendorlen<0)goto err_out; - vc->vendor=_ogg_calloc(vendorlen+1,1); - _v_readstring(opb,vc->vendor,vendorlen); - vc->comments=oggpack_read(opb,32); - if(vc->comments<0)goto err_out; - vc->user_comments=_ogg_calloc(vc->comments+1,sizeof(char **)); - vc->comment_lengths=_ogg_calloc(vc->comments+1, sizeof(int)); - - for(i=0;i<vc->comments;i++){ - int len=oggpack_read(opb,32); - if(len<0)goto err_out; - vc->comment_lengths[i]=len; - vc->user_comments[i]=_ogg_calloc(len+1,1); - _v_readstring(opb,vc->user_comments[i],len); - } - if(oggpack_read(opb,1)!=1)goto err_out; /* EOP check */ - - return(0); - err_out: - vorbis_comment_clear(vc); - return(OV_EBADHEADER); -} - -/* all of the real encoding details are here. The modes, books, - everything */ -static int _vorbis_unpack_books(vorbis_info *vi,oggpack_buffer *opb){ - codec_setup_info *ci=vi->codec_setup; - int i; - if(!ci)return(OV_EFAULT); - - /* codebooks */ - ci->books=oggpack_read(opb,8)+1; - /*ci->book_param=_ogg_calloc(ci->books,sizeof(static_codebook *));*/ - for(i=0;i<ci->books;i++){ - ci->book_param[i]=_ogg_calloc(1,sizeof(static_codebook)); - if(vorbis_staticbook_unpack(opb,ci->book_param[i]))goto err_out; - } - - /* time backend settings */ - ci->times=oggpack_read(opb,6)+1; - /*ci->time_type=_ogg_malloc(ci->times*sizeof(int));*/ - /*ci->time_param=_ogg_calloc(ci->times,sizeof(void *));*/ - for(i=0;i<ci->times;i++){ - ci->time_type[i]=oggpack_read(opb,16); - if(ci->time_type[i]<0 || ci->time_type[i]>=VI_TIMEB)goto err_out; - ci->time_param[i]=_time_P[ci->time_type[i]]->unpack(vi,opb); - if(!ci->time_param[i])goto err_out; - } - - /* floor backend settings */ - ci->floors=oggpack_read(opb,6)+1; - /*ci->floor_type=_ogg_malloc(ci->floors*sizeof(int));*/ - /*ci->floor_param=_ogg_calloc(ci->floors,sizeof(void *));*/ - for(i=0;i<ci->floors;i++){ - ci->floor_type[i]=oggpack_read(opb,16); - if(ci->floor_type[i]<0 || ci->floor_type[i]>=VI_FLOORB)goto err_out; - ci->floor_param[i]=_floor_P[ci->floor_type[i]]->unpack(vi,opb); - if(!ci->floor_param[i])goto err_out; - } - - /* residue backend settings */ - ci->residues=oggpack_read(opb,6)+1; - /*ci->residue_type=_ogg_malloc(ci->residues*sizeof(int));*/ - /*ci->residue_param=_ogg_calloc(ci->residues,sizeof(void *));*/ - for(i=0;i<ci->residues;i++){ - ci->residue_type[i]=oggpack_read(opb,16); - if(ci->residue_type[i]<0 || ci->residue_type[i]>=VI_RESB)goto err_out; - ci->residue_param[i]=_residue_P[ci->residue_type[i]]->unpack(vi,opb); - if(!ci->residue_param[i])goto err_out; - } - - /* map backend settings */ - ci->maps=oggpack_read(opb,6)+1; - /*ci->map_type=_ogg_malloc(ci->maps*sizeof(int));*/ - /*ci->map_param=_ogg_calloc(ci->maps,sizeof(void *));*/ - for(i=0;i<ci->maps;i++){ - ci->map_type[i]=oggpack_read(opb,16); - if(ci->map_type[i]<0 || ci->map_type[i]>=VI_MAPB)goto err_out; - ci->map_param[i]=_mapping_P[ci->map_type[i]]->unpack(vi,opb); - if(!ci->map_param[i])goto err_out; - } - - /* mode settings */ - ci->modes=oggpack_read(opb,6)+1; - /*vi->mode_param=_ogg_calloc(vi->modes,sizeof(void *));*/ - for(i=0;i<ci->modes;i++){ - ci->mode_param[i]=_ogg_calloc(1,sizeof(vorbis_info_mode)); - ci->mode_param[i]->blockflag=oggpack_read(opb,1); - ci->mode_param[i]->windowtype=oggpack_read(opb,16); - ci->mode_param[i]->transformtype=oggpack_read(opb,16); - ci->mode_param[i]->mapping=oggpack_read(opb,8); - - if(ci->mode_param[i]->windowtype>=VI_WINDOWB)goto err_out; - if(ci->mode_param[i]->transformtype>=VI_WINDOWB)goto err_out; - if(ci->mode_param[i]->mapping>=ci->maps)goto err_out; - } - - if(oggpack_read(opb,1)!=1)goto err_out; /* top level EOP check */ - - return(0); - err_out: - vorbis_info_clear(vi); - return(OV_EBADHEADER); -} - -/* The Vorbis header is in three packets; the initial small packet in - the first page that identifies basic parameters, a second packet - with bitstream comments and a third packet that holds the - codebook. */ - -int vorbis_synthesis_headerin(vorbis_info *vi,vorbis_comment *vc,ogg_packet *op){ - oggpack_buffer opb; - - if(op){ - oggpack_readinit(&opb,op->packet,op->bytes); - - /* Which of the three types of header is this? */ - /* Also verify header-ness, vorbis */ - { - char buffer[6]; - int packtype=oggpack_read(&opb,8); - memset(buffer,0,6); - _v_readstring(&opb,buffer,6); - if(memcmp(buffer,"vorbis",6)){ - /* not a vorbis header */ - return(OV_ENOTVORBIS); - } - switch(packtype){ - case 0x01: /* least significant *bit* is read first */ - if(!op->b_o_s){ - /* Not the initial packet */ - return(OV_EBADHEADER); - } - if(vi->rate!=0){ - /* previously initialized info header */ - return(OV_EBADHEADER); - } - - return(_vorbis_unpack_info(vi,&opb)); - - case 0x03: /* least significant *bit* is read first */ - if(vi->rate==0){ - /* um... we didn't get the initial header */ - return(OV_EBADHEADER); - } - - return(_vorbis_unpack_comment(vc,&opb)); - - case 0x05: /* least significant *bit* is read first */ - if(vi->rate==0 || vc->vendor==NULL){ - /* um... we didn;t get the initial header or comments yet */ - return(OV_EBADHEADER); - } - - return(_vorbis_unpack_books(vi,&opb)); - - default: - /* Not a valid vorbis header type */ - return(OV_EBADHEADER); - break; - } - } - } - return(OV_EBADHEADER); -} - -/* pack side **********************************************************/ - -static int _vorbis_pack_info(oggpack_buffer *opb,vorbis_info *vi){ - codec_setup_info *ci=vi->codec_setup; - if(!ci)return(OV_EFAULT); - - /* preamble */ - oggpack_write(opb,0x01,8); - _v_writestring(opb,"vorbis"); - - /* basic information about the stream */ - oggpack_write(opb,0x00,32); - oggpack_write(opb,vi->channels,8); - oggpack_write(opb,vi->rate,32); - - oggpack_write(opb,vi->bitrate_upper,32); - oggpack_write(opb,vi->bitrate_nominal,32); - oggpack_write(opb,vi->bitrate_lower,32); - - oggpack_write(opb,ilog2(ci->blocksizes[0]),4); - oggpack_write(opb,ilog2(ci->blocksizes[1]),4); - oggpack_write(opb,1,1); - - return(0); -} - -static int _vorbis_pack_comment(oggpack_buffer *opb,vorbis_comment *vc){ - char temp[]="Xiphophorus libVorbis I 20010812"; - - /* preamble */ - oggpack_write(opb,0x03,8); - _v_writestring(opb,"vorbis"); - - /* vendor */ - oggpack_write(opb,strlen(temp),32); - _v_writestring(opb,temp); - - /* comments */ - - oggpack_write(opb,vc->comments,32); - if(vc->comments){ - int i; - for(i=0;i<vc->comments;i++){ - if(vc->user_comments[i]){ - oggpack_write(opb,vc->comment_lengths[i],32); - _v_writestring(opb,vc->user_comments[i]); - }else{ - oggpack_write(opb,0,32); - } - } - } - oggpack_write(opb,1,1); - - return(0); -} - -static int _vorbis_pack_books(oggpack_buffer *opb,vorbis_info *vi){ - codec_setup_info *ci=vi->codec_setup; - int i; - if(!ci)return(OV_EFAULT); - - oggpack_write(opb,0x05,8); - _v_writestring(opb,"vorbis"); - - /* books */ - oggpack_write(opb,ci->books-1,8); - for(i=0;i<ci->books;i++) - if(vorbis_staticbook_pack(ci->book_param[i],opb))goto err_out; - - /* times */ - oggpack_write(opb,ci->times-1,6); - for(i=0;i<ci->times;i++){ - oggpack_write(opb,ci->time_type[i],16); - _time_P[ci->time_type[i]]->pack(ci->time_param[i],opb); - } - - /* floors */ - oggpack_write(opb,ci->floors-1,6); - for(i=0;i<ci->floors;i++){ - oggpack_write(opb,ci->floor_type[i],16); - _floor_P[ci->floor_type[i]]->pack(ci->floor_param[i],opb); - } - - /* residues */ - oggpack_write(opb,ci->residues-1,6); - for(i=0;i<ci->residues;i++){ - oggpack_write(opb,ci->residue_type[i],16); - _residue_P[ci->residue_type[i]]->pack(ci->residue_param[i],opb); - } - - /* maps */ - oggpack_write(opb,ci->maps-1,6); - for(i=0;i<ci->maps;i++){ - oggpack_write(opb,ci->map_type[i],16); - _mapping_P[ci->map_type[i]]->pack(vi,ci->map_param[i],opb); - } - - /* modes */ - oggpack_write(opb,ci->modes-1,6); - for(i=0;i<ci->modes;i++){ - oggpack_write(opb,ci->mode_param[i]->blockflag,1); - oggpack_write(opb,ci->mode_param[i]->windowtype,16); - oggpack_write(opb,ci->mode_param[i]->transformtype,16); - oggpack_write(opb,ci->mode_param[i]->mapping,8); - } - oggpack_write(opb,1,1); - - return(0); -err_out: - return(-1); -} - -int vorbis_commentheader_out(vorbis_comment *vc, - ogg_packet *op){ - - oggpack_buffer opb; - - oggpack_writeinit(&opb); - if(_vorbis_pack_comment(&opb,vc)) return OV_EIMPL; - - op->packet = _ogg_malloc(oggpack_bytes(&opb)); - memcpy(op->packet, opb.buffer, oggpack_bytes(&opb)); - - op->bytes=oggpack_bytes(&opb); - op->b_o_s=0; - op->e_o_s=0; - op->granulepos=0; - - return 0; -} - -int vorbis_analysis_headerout(vorbis_dsp_state *v, - vorbis_comment *vc, - ogg_packet *op, - ogg_packet *op_comm, - ogg_packet *op_code){ - int ret=OV_EIMPL; - vorbis_info *vi=v->vi; - oggpack_buffer opb; - backend_lookup_state *b=v->backend_state; - - if(!b){ - ret=OV_EFAULT; - goto err_out; - } - - /* first header packet **********************************************/ - - oggpack_writeinit(&opb); - if(_vorbis_pack_info(&opb,vi))goto err_out; - - /* build the packet */ - if(b->header)_ogg_free(b->header); - b->header=_ogg_malloc(oggpack_bytes(&opb)); - memcpy(b->header,opb.buffer,oggpack_bytes(&opb)); - op->packet=b->header; - op->bytes=oggpack_bytes(&opb); - op->b_o_s=1; - op->e_o_s=0; - op->granulepos=0; - - /* second header packet (comments) **********************************/ - - oggpack_reset(&opb); - if(_vorbis_pack_comment(&opb,vc))goto err_out; - - if(b->header1)_ogg_free(b->header1); - b->header1=_ogg_malloc(oggpack_bytes(&opb)); - memcpy(b->header1,opb.buffer,oggpack_bytes(&opb)); - op_comm->packet=b->header1; - op_comm->bytes=oggpack_bytes(&opb); - op_comm->b_o_s=0; - op_comm->e_o_s=0; - op_comm->granulepos=0; - - /* third header packet (modes/codebooks) ****************************/ - - oggpack_reset(&opb); - if(_vorbis_pack_books(&opb,vi))goto err_out; - - if(b->header2)_ogg_free(b->header2); - b->header2=_ogg_malloc(oggpack_bytes(&opb)); - memcpy(b->header2,opb.buffer,oggpack_bytes(&opb)); - op_code->packet=b->header2; - op_code->bytes=oggpack_bytes(&opb); - op_code->b_o_s=0; - op_code->e_o_s=0; - op_code->granulepos=0; - - oggpack_writeclear(&opb); - return(0); - err_out: - oggpack_writeclear(&opb); - memset(op,0,sizeof(ogg_packet)); - memset(op_comm,0,sizeof(ogg_packet)); - memset(op_code,0,sizeof(ogg_packet)); - - if(b->header)_ogg_free(b->header); - if(b->header1)_ogg_free(b->header1); - if(b->header2)_ogg_free(b->header2); - b->header=NULL; - b->header1=NULL; - b->header2=NULL; - return(ret); -} - |