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-rw-r--r--Tremolo/treminfo.c348
1 files changed, 0 insertions, 348 deletions
diff --git a/Tremolo/treminfo.c b/Tremolo/treminfo.c
deleted file mode 100644
index 5373885..0000000
--- a/Tremolo/treminfo.c
+++ /dev/null
@@ -1,348 +0,0 @@
-/********************************************************************
- * *
- * THIS FILE IS PART OF THE OggVorbis 'TREMOR' 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 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2003 *
- * BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
- * *
- ********************************************************************
-
- function: maintain the info structure, info <-> header packets
-
- ********************************************************************/
-
-/* general handling of the header and the vorbis_info structure (and
- substructures) */
-
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-#include "ogg.h"
-#include "ivorbiscodec.h"
-#include "codec_internal.h"
-#include "codebook.h"
-#include "misc.h"
-#include "os.h"
-
-/* helpers */
-static void _v_readstring(oggpack_buffer *o,char *buf,int bytes){
- while(bytes--){
- *buf++=(char)oggpack_read(o,8);
- }
-}
-
-void vorbis_comment_init(vorbis_comment *vc){
- memset(vc,0,sizeof(*vc));
-}
-
-/* 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 = (char *)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 = (char *)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(*vc));
-}
-
-/* blocksize 0 is guaranteed to be short, 1 is guarantted to be long.
- They may be equal, but short will never ge greater than long */
-int vorbis_info_blocksize(vorbis_info *vi,int zo){
- codec_setup_info *ci = (codec_setup_info *)vi->codec_setup;
- return ci ? ci->blocksizes[zo] : -1;
-}
-
-/* used by synthesis, which has a full, alloced vi */
-void vorbis_info_init(vorbis_info *vi){
- memset(vi,0,sizeof(*vi));
- vi->codec_setup=(codec_setup_info *)_ogg_calloc(1,sizeof(codec_setup_info));
-}
-
-void vorbis_info_clear(vorbis_info *vi){
- codec_setup_info *ci=(codec_setup_info *)vi->codec_setup;
- int i;
-
- if(ci){
-
- if(ci->mode_param)_ogg_free(ci->mode_param);
-
- if(ci->map_param){
- for(i=0;i<ci->maps;i++) /* unpack does the range checking */
- mapping_clear_info(ci->map_param+i);
- _ogg_free(ci->map_param);
- }
-
- if(ci->floor_param){
- for(i=0;i<ci->floors;i++) /* unpack does the range checking */
- if(ci->floor_type[i])
- floor1_free_info(ci->floor_param[i]);
- else
- floor0_free_info(ci->floor_param[i]);
- _ogg_free(ci->floor_param);
- _ogg_free(ci->floor_type);
- }
-
- if(ci->residue_param){
- for(i=0;i<ci->residues;i++) /* unpack does the range checking */
- res_clear_info(ci->residue_param+i);
- _ogg_free(ci->residue_param);
- }
-
- if(ci->book_param){
- for(i=0;i<ci->books;i++)
- vorbis_book_clear(ci->book_param+i);
- _ogg_free(ci->book_param);
- }
-
- _ogg_free(ci);
- }
-
- memset(vi,0,sizeof(*vi));
-}
-
-/* Header packing/unpacking ********************************************/
-
-static int _vorbis_unpack_info(vorbis_info *vi,oggpack_buffer *opb){
- codec_setup_info *ci=(codec_setup_info *)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);
-
-#ifdef LIMIT_TO_64kHz
- if(vi->rate>=64000 || ci->blocksizes[1]>4096)goto err_out;
-#else
- if(vi->rate<64000 && ci->blocksizes[1]>4096)goto err_out;
-#endif
-
- if(vi->rate<1)goto err_out;
- if(vi->channels<1)goto err_out;
- if(ci->blocksizes[0]<64)goto err_out;
- if(ci->blocksizes[1]<ci->blocksizes[0])goto err_out;
- if(ci->blocksizes[1]>8192)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=(char *)_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=(char **)_ogg_calloc(vc->comments+1,sizeof(*vc->user_comments));
- vc->comment_lengths=(int *)_ogg_calloc(vc->comments+1, sizeof(*vc->comment_lengths));
-
- 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]=(char *)_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=(codec_setup_info *)vi->codec_setup;
- int i;
- if(!ci)return(OV_EFAULT);
-
- /* codebooks */
- ci->books=oggpack_read(opb,8)+1;
- ci->book_param=(codebook *)_ogg_calloc(ci->books,sizeof(*ci->book_param));
- for(i=0;i<ci->books;i++)
- if(vorbis_book_unpack(opb,ci->book_param+i))goto err_out;
-
- /* time backend settings, not actually used */
- i=oggpack_read(opb,6);
- for(;i>=0;i--)
- if(oggpack_read(opb,16)!=0)goto err_out;
-
- /* floor backend settings */
- ci->floors=oggpack_read(opb,6)+1;
- ci->floor_param=_ogg_malloc(sizeof(*ci->floor_param)*ci->floors);
- ci->floor_type=_ogg_malloc(sizeof(*ci->floor_type)*ci->floors);
- for(i=0;i<ci->floors;i++){
- ci->floor_type[i]=(char)oggpack_read(opb,16);
- if(ci->floor_type[i]<0 || ci->floor_type[i]>=VI_FLOORB)goto err_out;
- if(ci->floor_type[i])
- ci->floor_param[i]=floor1_info_unpack(vi,opb);
- else
- ci->floor_param[i]=floor0_info_unpack(vi,opb);
- if(!ci->floor_param[i])goto err_out;
- }
-
- /* residue backend settings */
- ci->residues=oggpack_read(opb,6)+1;
- ci->residue_param=_ogg_malloc(sizeof(*ci->residue_param)*ci->residues);
- for(i=0;i<ci->residues;i++)
- if(res_unpack(ci->residue_param+i,vi,opb))goto err_out;
-
- /* map backend settings */
- ci->maps=oggpack_read(opb,6)+1;
- ci->map_param=_ogg_malloc(sizeof(*ci->map_param)*ci->maps);
- for(i=0;i<ci->maps;i++){
- if(oggpack_read(opb,16)!=0)goto err_out;
- if(mapping_info_unpack(ci->map_param+i,vi,opb))goto err_out;
- }
-
- /* mode settings */
- ci->modes=oggpack_read(opb,6)+1;
- ci->mode_param=
- (vorbis_info_mode *)_ogg_malloc(ci->modes*sizeof(*ci->mode_param));
- for(i=0;i<ci->modes;i++){
- ci->mode_param[i].blockflag=(unsigned char)oggpack_read(opb,1);
- if(oggpack_read(opb,16))goto err_out;
- if(oggpack_read(opb,16))goto err_out;
- ci->mode_param[i].mapping=(unsigned char)oggpack_read(opb,8);
- 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_dsp_headerin(vorbis_info *vi,vorbis_comment *vc,ogg_packet *op){
- oggpack_buffer opb;
-
- if(op){
- oggpack_readinit(&opb,op->packet);
-
- /* 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);
-}
-
generated by cgit v1.1 at 2024-04-29 09:34:09 +0000