1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libtheora/lib/dequant.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,182 @@
1.4 +/********************************************************************
1.5 + * *
1.6 + * THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. *
1.7 + * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
1.8 + * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
1.9 + * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
1.10 + * *
1.11 + * THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009 *
1.12 + * by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
1.13 + * *
1.14 + ********************************************************************
1.15 +
1.16 + function:
1.17 + last mod: $Id: dequant.c 16503 2009-08-22 18:14:02Z giles $
1.18 +
1.19 + ********************************************************************/
1.20 +
1.21 +#include <stdlib.h>
1.22 +#include <string.h>
1.23 +#include <ogg/ogg.h>
1.24 +#include "dequant.h"
1.25 +#include "decint.h"
1.26 +
1.27 +int oc_quant_params_unpack(oc_pack_buf *_opb,th_quant_info *_qinfo){
1.28 + th_quant_base *base_mats;
1.29 + long val;
1.30 + int nbase_mats;
1.31 + int sizes[64];
1.32 + int indices[64];
1.33 + int nbits;
1.34 + int bmi;
1.35 + int ci;
1.36 + int qti;
1.37 + int pli;
1.38 + int qri;
1.39 + int qi;
1.40 + int i;
1.41 + val=oc_pack_read(_opb,3);
1.42 + nbits=(int)val;
1.43 + for(qi=0;qi<64;qi++){
1.44 + val=oc_pack_read(_opb,nbits);
1.45 + _qinfo->loop_filter_limits[qi]=(unsigned char)val;
1.46 + }
1.47 + val=oc_pack_read(_opb,4);
1.48 + nbits=(int)val+1;
1.49 + for(qi=0;qi<64;qi++){
1.50 + val=oc_pack_read(_opb,nbits);
1.51 + _qinfo->ac_scale[qi]=(ogg_uint16_t)val;
1.52 + }
1.53 + val=oc_pack_read(_opb,4);
1.54 + nbits=(int)val+1;
1.55 + for(qi=0;qi<64;qi++){
1.56 + val=oc_pack_read(_opb,nbits);
1.57 + _qinfo->dc_scale[qi]=(ogg_uint16_t)val;
1.58 + }
1.59 + val=oc_pack_read(_opb,9);
1.60 + nbase_mats=(int)val+1;
1.61 + base_mats=_ogg_malloc(nbase_mats*sizeof(base_mats[0]));
1.62 + if(base_mats==NULL)return TH_EFAULT;
1.63 + for(bmi=0;bmi<nbase_mats;bmi++){
1.64 + for(ci=0;ci<64;ci++){
1.65 + val=oc_pack_read(_opb,8);
1.66 + base_mats[bmi][ci]=(unsigned char)val;
1.67 + }
1.68 + }
1.69 + nbits=oc_ilog(nbase_mats-1);
1.70 + for(i=0;i<6;i++){
1.71 + th_quant_ranges *qranges;
1.72 + th_quant_base *qrbms;
1.73 + int *qrsizes;
1.74 + qti=i/3;
1.75 + pli=i%3;
1.76 + qranges=_qinfo->qi_ranges[qti]+pli;
1.77 + if(i>0){
1.78 + val=oc_pack_read1(_opb);
1.79 + if(!val){
1.80 + int qtj;
1.81 + int plj;
1.82 + if(qti>0){
1.83 + val=oc_pack_read1(_opb);
1.84 + if(val){
1.85 + qtj=qti-1;
1.86 + plj=pli;
1.87 + }
1.88 + else{
1.89 + qtj=(i-1)/3;
1.90 + plj=(i-1)%3;
1.91 + }
1.92 + }
1.93 + else{
1.94 + qtj=(i-1)/3;
1.95 + plj=(i-1)%3;
1.96 + }
1.97 + *qranges=*(_qinfo->qi_ranges[qtj]+plj);
1.98 + continue;
1.99 + }
1.100 + }
1.101 + val=oc_pack_read(_opb,nbits);
1.102 + indices[0]=(int)val;
1.103 + for(qi=qri=0;qi<63;){
1.104 + val=oc_pack_read(_opb,oc_ilog(62-qi));
1.105 + sizes[qri]=(int)val+1;
1.106 + qi+=(int)val+1;
1.107 + val=oc_pack_read(_opb,nbits);
1.108 + indices[++qri]=(int)val;
1.109 + }
1.110 + /*Note: The caller is responsible for cleaning up any partially
1.111 + constructed qinfo.*/
1.112 + if(qi>63){
1.113 + _ogg_free(base_mats);
1.114 + return TH_EBADHEADER;
1.115 + }
1.116 + qranges->nranges=qri;
1.117 + qranges->sizes=qrsizes=(int *)_ogg_malloc(qri*sizeof(qrsizes[0]));
1.118 + if(qranges->sizes==NULL){
1.119 + /*Note: The caller is responsible for cleaning up any partially
1.120 + constructed qinfo.*/
1.121 + _ogg_free(base_mats);
1.122 + return TH_EFAULT;
1.123 + }
1.124 + memcpy(qrsizes,sizes,qri*sizeof(qrsizes[0]));
1.125 + qrbms=(th_quant_base *)_ogg_malloc((qri+1)*sizeof(qrbms[0]));
1.126 + if(qrbms==NULL){
1.127 + /*Note: The caller is responsible for cleaning up any partially
1.128 + constructed qinfo.*/
1.129 + _ogg_free(base_mats);
1.130 + return TH_EFAULT;
1.131 + }
1.132 + qranges->base_matrices=(const th_quant_base *)qrbms;
1.133 + do{
1.134 + bmi=indices[qri];
1.135 + /*Note: The caller is responsible for cleaning up any partially
1.136 + constructed qinfo.*/
1.137 + if(bmi>=nbase_mats){
1.138 + _ogg_free(base_mats);
1.139 + return TH_EBADHEADER;
1.140 + }
1.141 + memcpy(qrbms[qri],base_mats[bmi],sizeof(qrbms[qri]));
1.142 + }
1.143 + while(qri-->0);
1.144 + }
1.145 + _ogg_free(base_mats);
1.146 + return 0;
1.147 +}
1.148 +
1.149 +void oc_quant_params_clear(th_quant_info *_qinfo){
1.150 + int i;
1.151 + for(i=6;i-->0;){
1.152 + int qti;
1.153 + int pli;
1.154 + qti=i/3;
1.155 + pli=i%3;
1.156 + /*Clear any duplicate pointer references.*/
1.157 + if(i>0){
1.158 + int qtj;
1.159 + int plj;
1.160 + qtj=(i-1)/3;
1.161 + plj=(i-1)%3;
1.162 + if(_qinfo->qi_ranges[qti][pli].sizes==
1.163 + _qinfo->qi_ranges[qtj][plj].sizes){
1.164 + _qinfo->qi_ranges[qti][pli].sizes=NULL;
1.165 + }
1.166 + if(_qinfo->qi_ranges[qti][pli].base_matrices==
1.167 + _qinfo->qi_ranges[qtj][plj].base_matrices){
1.168 + _qinfo->qi_ranges[qti][pli].base_matrices=NULL;
1.169 + }
1.170 + }
1.171 + if(qti>0){
1.172 + if(_qinfo->qi_ranges[1][pli].sizes==
1.173 + _qinfo->qi_ranges[0][pli].sizes){
1.174 + _qinfo->qi_ranges[1][pli].sizes=NULL;
1.175 + }
1.176 + if(_qinfo->qi_ranges[1][pli].base_matrices==
1.177 + _qinfo->qi_ranges[0][pli].base_matrices){
1.178 + _qinfo->qi_ranges[1][pli].base_matrices=NULL;
1.179 + }
1.180 + }
1.181 + /*Now free all the non-duplicate storage.*/
1.182 + _ogg_free((void *)_qinfo->qi_ranges[qti][pli].sizes);
1.183 + _ogg_free((void *)_qinfo->qi_ranges[qti][pli].base_matrices);
1.184 + }
1.185 +}
