The Tor Browser / file comparison
comparison: media/libtheora/lib/dequant.c
media/libtheora/lib/dequant.c
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
equal
deleted
inserted
replaced
| -1:000000000000 | 0:d66bcb70f814 |
|---|---|
| 1 /******************************************************************** | |
| 2 * * | |
| 3 * THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. * | |
| 4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * | |
| 5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * | |
| 6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * | |
| 7 * * | |
| 8 * THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009 * | |
| 9 * by the Xiph.Org Foundation and contributors http://www.xiph.org/ * | |
| 10 * * | |
| 11 ******************************************************************** | |
| 12 | |
| 13 function: | |
| 14 last mod: $Id: dequant.c 16503 2009-08-22 18:14:02Z giles $ | |
| 15 | |
| 16 ********************************************************************/ | |
| 17 | |
| 18 #include <stdlib.h> | |
| 19 #include <string.h> | |
| 20 #include <ogg/ogg.h> | |
| 21 #include "dequant.h" | |
| 22 #include "decint.h" | |
| 23 | |
| 24 int oc_quant_params_unpack(oc_pack_buf *_opb,th_quant_info *_qinfo){ | |
| 25 th_quant_base *base_mats; | |
| 26 long val; | |
| 27 int nbase_mats; | |
| 28 int sizes[64]; | |
| 29 int indices[64]; | |
| 30 int nbits; | |
| 31 int bmi; | |
| 32 int ci; | |
| 33 int qti; | |
| 34 int pli; | |
| 35 int qri; | |
| 36 int qi; | |
| 37 int i; | |
| 38 val=oc_pack_read(_opb,3); | |
| 39 nbits=(int)val; | |
| 40 for(qi=0;qi<64;qi++){ | |
| 41 val=oc_pack_read(_opb,nbits); | |
| 42 _qinfo->loop_filter_limits[qi]=(unsigned char)val; | |
| 43 } | |
| 44 val=oc_pack_read(_opb,4); | |
| 45 nbits=(int)val+1; | |
| 46 for(qi=0;qi<64;qi++){ | |
| 47 val=oc_pack_read(_opb,nbits); | |
| 48 _qinfo->ac_scale[qi]=(ogg_uint16_t)val; | |
| 49 } | |
| 50 val=oc_pack_read(_opb,4); | |
| 51 nbits=(int)val+1; | |
| 52 for(qi=0;qi<64;qi++){ | |
| 53 val=oc_pack_read(_opb,nbits); | |
| 54 _qinfo->dc_scale[qi]=(ogg_uint16_t)val; | |
| 55 } | |
| 56 val=oc_pack_read(_opb,9); | |
| 57 nbase_mats=(int)val+1; | |
| 58 base_mats=_ogg_malloc(nbase_mats*sizeof(base_mats[0])); | |
| 59 if(base_mats==NULL)return TH_EFAULT; | |
| 60 for(bmi=0;bmi<nbase_mats;bmi++){ | |
| 61 for(ci=0;ci<64;ci++){ | |
| 62 val=oc_pack_read(_opb,8); | |
| 63 base_mats[bmi][ci]=(unsigned char)val; | |
| 64 } | |
| 65 } | |
| 66 nbits=oc_ilog(nbase_mats-1); | |
| 67 for(i=0;i<6;i++){ | |
| 68 th_quant_ranges *qranges; | |
| 69 th_quant_base *qrbms; | |
| 70 int *qrsizes; | |
| 71 qti=i/3; | |
| 72 pli=i%3; | |
| 73 qranges=_qinfo->qi_ranges[qti]+pli; | |
| 74 if(i>0){ | |
| 75 val=oc_pack_read1(_opb); | |
| 76 if(!val){ | |
| 77 int qtj; | |
| 78 int plj; | |
| 79 if(qti>0){ | |
| 80 val=oc_pack_read1(_opb); | |
| 81 if(val){ | |
| 82 qtj=qti-1; | |
| 83 plj=pli; | |
| 84 } | |
| 85 else{ | |
| 86 qtj=(i-1)/3; | |
| 87 plj=(i-1)%3; | |
| 88 } | |
| 89 } | |
| 90 else{ | |
| 91 qtj=(i-1)/3; | |
| 92 plj=(i-1)%3; | |
| 93 } | |
| 94 *qranges=*(_qinfo->qi_ranges[qtj]+plj); | |
| 95 continue; | |
| 96 } | |
| 97 } | |
| 98 val=oc_pack_read(_opb,nbits); | |
| 99 indices[0]=(int)val; | |
| 100 for(qi=qri=0;qi<63;){ | |
| 101 val=oc_pack_read(_opb,oc_ilog(62-qi)); | |
| 102 sizes[qri]=(int)val+1; | |
| 103 qi+=(int)val+1; | |
| 104 val=oc_pack_read(_opb,nbits); | |
| 105 indices[++qri]=(int)val; | |
| 106 } | |
| 107 /*Note: The caller is responsible for cleaning up any partially | |
| 108 constructed qinfo.*/ | |
| 109 if(qi>63){ | |
| 110 _ogg_free(base_mats); | |
| 111 return TH_EBADHEADER; | |
| 112 } | |
| 113 qranges->nranges=qri; | |
| 114 qranges->sizes=qrsizes=(int *)_ogg_malloc(qri*sizeof(qrsizes[0])); | |
| 115 if(qranges->sizes==NULL){ | |
| 116 /*Note: The caller is responsible for cleaning up any partially | |
| 117 constructed qinfo.*/ | |
| 118 _ogg_free(base_mats); | |
| 119 return TH_EFAULT; | |
| 120 } | |
| 121 memcpy(qrsizes,sizes,qri*sizeof(qrsizes[0])); | |
| 122 qrbms=(th_quant_base *)_ogg_malloc((qri+1)*sizeof(qrbms[0])); | |
| 123 if(qrbms==NULL){ | |
| 124 /*Note: The caller is responsible for cleaning up any partially | |
| 125 constructed qinfo.*/ | |
| 126 _ogg_free(base_mats); | |
| 127 return TH_EFAULT; | |
| 128 } | |
| 129 qranges->base_matrices=(const th_quant_base *)qrbms; | |
| 130 do{ | |
| 131 bmi=indices[qri]; | |
| 132 /*Note: The caller is responsible for cleaning up any partially | |
| 133 constructed qinfo.*/ | |
| 134 if(bmi>=nbase_mats){ | |
| 135 _ogg_free(base_mats); | |
| 136 return TH_EBADHEADER; | |
| 137 } | |
| 138 memcpy(qrbms[qri],base_mats[bmi],sizeof(qrbms[qri])); | |
| 139 } | |
| 140 while(qri-->0); | |
| 141 } | |
| 142 _ogg_free(base_mats); | |
| 143 return 0; | |
| 144 } | |
| 145 | |
| 146 void oc_quant_params_clear(th_quant_info *_qinfo){ | |
| 147 int i; | |
| 148 for(i=6;i-->0;){ | |
| 149 int qti; | |
| 150 int pli; | |
| 151 qti=i/3; | |
| 152 pli=i%3; | |
| 153 /*Clear any duplicate pointer references.*/ | |
| 154 if(i>0){ | |
| 155 int qtj; | |
| 156 int plj; | |
| 157 qtj=(i-1)/3; | |
| 158 plj=(i-1)%3; | |
| 159 if(_qinfo->qi_ranges[qti][pli].sizes== | |
| 160 _qinfo->qi_ranges[qtj][plj].sizes){ | |
| 161 _qinfo->qi_ranges[qti][pli].sizes=NULL; | |
| 162 } | |
| 163 if(_qinfo->qi_ranges[qti][pli].base_matrices== | |
| 164 _qinfo->qi_ranges[qtj][plj].base_matrices){ | |
| 165 _qinfo->qi_ranges[qti][pli].base_matrices=NULL; | |
| 166 } | |
| 167 } | |
| 168 if(qti>0){ | |
| 169 if(_qinfo->qi_ranges[1][pli].sizes== | |
| 170 _qinfo->qi_ranges[0][pli].sizes){ | |
| 171 _qinfo->qi_ranges[1][pli].sizes=NULL; | |
| 172 } | |
| 173 if(_qinfo->qi_ranges[1][pli].base_matrices== | |
| 174 _qinfo->qi_ranges[0][pli].base_matrices){ | |
| 175 _qinfo->qi_ranges[1][pli].base_matrices=NULL; | |
| 176 } | |
| 177 } | |
| 178 /*Now free all the non-duplicate storage.*/ | |
| 179 _ogg_free((void *)_qinfo->qi_ranges[qti][pli].sizes); | |
| 180 _ogg_free((void *)_qinfo->qi_ranges[qti][pli].base_matrices); | |
| 181 } | |
| 182 } |
