static vorbis_info_floor *floor1_unpack (vorbis_info *vi,oggpack_buffer *opb){
codec_setup_info *ci=vi->codec_setup;
int j,k,count=0,maxclass=-1,rangebits;
vorbis_info_floor1 *info=_ogg_calloc(1,sizeof(*info));
/* read partitions */
info->partitions=oggpack_read(opb,5); /* only 0 to 31 legal */
for(j=0;j<info->partitions;j++){
info->partitionclass[j]=oggpack_read(opb,4); /* only 0 to 15 legal */
if(maxclass<info->partitionclass[j])maxclass=info->partitionclass[j];
}
/* read partition classes */
for(j=0;j<maxclass+1;j++){
info->class_dim[j]=oggpack_read(opb,3)+1; /* 1 to 8 */
info->class_subs[j]=oggpack_read(opb,2); /* 0,1,2,3 bits */
if(info->class_subs[j]<0)
goto err_out;
if(info->class_subs[j])info->class_book[j]=oggpack_read(opb,8);
if(info->class_book[j]<0 || info->class_book[j]>=ci->books)
goto err_out;
for(k=0;k<(1<<info->class_subs[j]);k++){
info->class_subbook[j][k]=oggpack_read(opb,8)-1;
if(info->class_subbook[j][k]<-1 || info->class_subbook[j][k]>=ci->books)
goto err_out;
}
}
/* read the post list */
info->mult=oggpack_read(opb,2)+1; /* only 1,2,3,4 legal now */
rangebits=oggpack_read(opb,4);
for(j=0,k=0;j<info->partitions;j++){
count+=info->class_dim[info->partitionclass[j]];
for(;k<count;k++){
int t=info->postlist[k+2]=oggpack_read(opb,rangebits);
if(t<0 || t>=(1<<rangebits))
goto err_out;
}
}
info->postlist[0]=0;
info->postlist[1]=1<<rangebits;
return(info);
err_out:
floor1_free_info(info);
return(NULL);
}
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));
}
static vorbis_info_floor *floor1_unpack (vorbis_info *vi,oggpack_buffer *opb) {
codec_setup_info *ci=(codec_setup_info*)vi->codec_setup;
int j,k,count=0,maxclass=-1,rangebits;
vorbis_info_floor1 *info=(vorbis_info_floor1*)_ogg_calloc(1,sizeof(*info));
/* read partitions */
info->partitions=oggpack_read(opb,5); /* only 0 to 31 legal */
for(j=0; j<info->partitions; j++) {
info->partitionclass[j]=oggpack_read(opb,4); /* only 0 to 15 legal */
if(info->partitionclass[j]<0)goto err_out;
if(maxclass<info->partitionclass[j])maxclass=info->partitionclass[j];
}
/* read partition classes */
for(j=0; j<maxclass+1; j++) {
info->class_dim[j]=oggpack_read(opb,3)+1; /* 1 to 8 */
info->class_subs[j]=oggpack_read(opb,2); /* 0,1,2,3 bits */
if(info->class_subs[j]<0)
goto err_out;
if(info->class_subs[j])info->class_book[j]=oggpack_read(opb,8);
if(info->class_book[j]<0 || info->class_book[j]>=ci->books)
goto err_out;
for(k=0; k<(1<<info->class_subs[j]); k++) {
info->class_subbook[j][k]=oggpack_read(opb,8)-1;
if(info->class_subbook[j][k]<-1 || info->class_subbook[j][k]>=ci->books)
goto err_out;
}
}
/* read the post list */
info->mult=oggpack_read(opb,2)+1; /* only 1,2,3,4 legal now */
rangebits=oggpack_read(opb,4);
if(rangebits<0)goto err_out;
for(j=0,k=0; j<info->partitions; j++) {
count+=info->class_dim[info->partitionclass[j]];
for(; k<count; k++) {
int t=info->postlist[k+2]=oggpack_read(opb,rangebits);
if(t<0 || t>=(1<<rangebits))
goto err_out;
}
}
info->postlist[0]=0;
info->postlist[1]=1<<rangebits;
/* don't allow repeated values in post list as they'd result in
zero-length segments */
{
int *sortpointer[VIF_POSIT+2];
for(j=0; j<count+2; j++)sortpointer[j]=info->postlist+j;
qsort(sortpointer,count+2,sizeof(*sortpointer),icomp);
for(j=1; j<count+2; j++)
if(*sortpointer[j-1]==*sortpointer[j])goto err_out;
}
return(info);
err_out:
floor1_free_info(info);
return(NULL);
}
