Mercurial > SDL_sound_CoreAudio
annotate decoders/mpglib/layer3.c @ 453:b9856ba6fb4e
Updated comments on supported files to include Speex.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Sat, 13 Sep 2003 20:35:24 +0000 |
| parents | 5b00e43ec23c |
| children | 72efeb4643b6 |
| rev | line source |
|---|---|
| 261 | 1 /* |
| 2 * Mpeg Layer-3 audio decoder | |
| 3 * -------------------------- | |
| 4 * copyright (c) 1995,1996,1997 by Michael Hipp. | |
| 5 * All rights reserved. See also 'README' | |
| 6 */ | |
| 7 | |
|
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8 #include <stdio.h> |
| 261 | 9 #include <stdlib.h> |
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10 |
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11 #include "SDL_sound.h" |
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12 |
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13 #define __SDL_SOUND_INTERNAL__ |
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14 #include "SDL_sound_internal.h" |
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15 |
| 261 | 16 #include "mpg123_sdlsound.h" |
| 17 #include "mpglib_sdlsound.h" | |
| 18 #include "huffman.h" | |
| 19 | |
| 20 #define MPEG1 | |
| 21 | |
| 22 static real ispow[8207]; | |
| 23 static real aa_ca[8],aa_cs[8]; | |
| 24 static real COS1[12][6]; | |
| 25 static real win[4][36]; | |
| 26 static real win1[4][36]; | |
| 27 static real gainpow2[256+118+4]; | |
| 28 static real COS9[9]; | |
| 29 static real COS6_1,COS6_2; | |
| 30 static real tfcos36[9]; | |
| 31 static real tfcos12[3]; | |
| 32 | |
| 33 struct bandInfoStruct { | |
| 34 short longIdx[23]; | |
| 35 short longDiff[22]; | |
| 36 short shortIdx[14]; | |
| 37 short shortDiff[13]; | |
| 38 }; | |
| 39 | |
| 40 int longLimit[9][23]; | |
| 41 int shortLimit[9][14]; | |
| 42 | |
| 43 struct bandInfoStruct bandInfo[9] = { | |
| 44 | |
| 45 /* MPEG 1.0 */ | |
| 46 { {0,4,8,12,16,20,24,30,36,44,52,62,74, 90,110,134,162,196,238,288,342,418,576}, | |
| 47 {4,4,4,4,4,4,6,6,8, 8,10,12,16,20,24,28,34,42,50,54, 76,158}, | |
| 48 {0,4*3,8*3,12*3,16*3,22*3,30*3,40*3,52*3,66*3, 84*3,106*3,136*3,192*3}, | |
| 49 {4,4,4,4,6,8,10,12,14,18,22,30,56} } , | |
| 50 | |
| 51 { {0,4,8,12,16,20,24,30,36,42,50,60,72, 88,106,128,156,190,230,276,330,384,576}, | |
| 52 {4,4,4,4,4,4,6,6,6, 8,10,12,16,18,22,28,34,40,46,54, 54,192}, | |
| 53 {0,4*3,8*3,12*3,16*3,22*3,28*3,38*3,50*3,64*3, 80*3,100*3,126*3,192*3}, | |
| 54 {4,4,4,4,6,6,10,12,14,16,20,26,66} } , | |
| 55 | |
| 56 { {0,4,8,12,16,20,24,30,36,44,54,66,82,102,126,156,194,240,296,364,448,550,576} , | |
| 57 {4,4,4,4,4,4,6,6,8,10,12,16,20,24,30,38,46,56,68,84,102, 26} , | |
| 58 {0,4*3,8*3,12*3,16*3,22*3,30*3,42*3,58*3,78*3,104*3,138*3,180*3,192*3} , | |
| 59 {4,4,4,4,6,8,12,16,20,26,34,42,12} } , | |
| 60 | |
| 61 /* MPEG 2.0 */ | |
| 62 { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576}, | |
| 63 {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 } , | |
| 64 {0,4*3,8*3,12*3,18*3,24*3,32*3,42*3,56*3,74*3,100*3,132*3,174*3,192*3} , | |
| 65 {4,4,4,6,6,8,10,14,18,26,32,42,18 } } , | |
| 66 | |
| 67 { {0,6,12,18,24,30,36,44,54,66,80,96,114,136,162,194,232,278,330,394,464,540,576}, | |
| 68 {6,6,6,6,6,6,8,10,12,14,16,18,22,26,32,38,46,52,64,70,76,36 } , | |
| 69 {0,4*3,8*3,12*3,18*3,26*3,36*3,48*3,62*3,80*3,104*3,136*3,180*3,192*3} , | |
| 70 {4,4,4,6,8,10,12,14,18,24,32,44,12 } } , | |
| 71 | |
| 72 { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576}, | |
| 73 {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 }, | |
| 74 {0,4*3,8*3,12*3,18*3,26*3,36*3,48*3,62*3,80*3,104*3,134*3,174*3,192*3}, | |
| 75 {4,4,4,6,8,10,12,14,18,24,30,40,18 } } , | |
| 76 /* MPEG 2.5 */ | |
| 77 { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576} , | |
| 78 {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54}, | |
| 79 {0,12,24,36,54,78,108,144,186,240,312,402,522,576}, | |
| 80 {4,4,4,6,8,10,12,14,18,24,30,40,18} }, | |
| 81 { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576} , | |
| 82 {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54}, | |
| 83 {0,12,24,36,54,78,108,144,186,240,312,402,522,576}, | |
| 84 {4,4,4,6,8,10,12,14,18,24,30,40,18} }, | |
| 85 { {0,12,24,36,48,60,72,88,108,132,160,192,232,280,336,400,476,566,568,570,572,574,576}, | |
| 86 {12,12,12,12,12,12,16,20,24,28,32,40,48,56,64,76,90,2,2,2,2,2}, | |
| 87 {0, 24, 48, 72,108,156,216,288,372,480,486,492,498,576}, | |
| 88 {8,8,8,12,16,20,24,28,36,2,2,2,26} } , | |
| 89 }; | |
| 90 | |
| 91 static int mapbuf0[9][152]; | |
| 92 static int mapbuf1[9][156]; | |
| 93 static int mapbuf2[9][44]; | |
| 94 static int *map[9][3]; | |
| 95 static int *mapend[9][3]; | |
| 96 | |
| 97 static unsigned int n_slen2[512]; /* MPEG 2.0 slen for 'normal' mode */ | |
| 98 static unsigned int i_slen2[256]; /* MPEG 2.0 slen for intensity stereo */ | |
| 99 | |
| 100 static real tan1_1[16],tan2_1[16],tan1_2[16],tan2_2[16]; | |
| 101 static real pow1_1[2][16],pow2_1[2][16],pow1_2[2][16],pow2_2[2][16]; | |
| 102 | |
| 103 /* | |
| 104 * init tables for layer-3 | |
| 105 */ | |
| 106 void init_layer3(int down_sample_sblimit) | |
| 107 { | |
| 108 int i,j,k,l; | |
| 109 | |
| 110 for(i=-256;i<118+4;i++) | |
| 111 gainpow2[i+256] = pow((double)2.0,-0.25 * (double) (i+210) ); | |
| 112 | |
| 113 for(i=0;i<8207;i++) | |
| 114 ispow[i] = pow((double)i,(double)4.0/3.0); | |
| 115 | |
| 116 for (i=0;i<8;i++) | |
| 117 { | |
| 118 static double Ci[8]={-0.6,-0.535,-0.33,-0.185,-0.095,-0.041,-0.0142,-0.0037}; | |
| 119 double sq=sqrt(1.0+Ci[i]*Ci[i]); | |
| 120 aa_cs[i] = 1.0/sq; | |
| 121 aa_ca[i] = Ci[i]/sq; | |
| 122 } | |
| 123 | |
| 124 for(i=0;i<18;i++) | |
| 125 { | |
| 126 win[0][i] = win[1][i] = 0.5 * sin( M_PI / 72.0 * (double) (2*(i+0) +1) ) / cos ( M_PI * (double) (2*(i+0) +19) / 72.0 ); | |
| 127 win[0][i+18] = win[3][i+18] = 0.5 * sin( M_PI / 72.0 * (double) (2*(i+18)+1) ) / cos ( M_PI * (double) (2*(i+18)+19) / 72.0 ); | |
| 128 } | |
| 129 for(i=0;i<6;i++) | |
| 130 { | |
| 131 win[1][i+18] = 0.5 / cos ( M_PI * (double) (2*(i+18)+19) / 72.0 ); | |
| 132 win[3][i+12] = 0.5 / cos ( M_PI * (double) (2*(i+12)+19) / 72.0 ); | |
| 133 win[1][i+24] = 0.5 * sin( M_PI / 24.0 * (double) (2*i+13) ) / cos ( M_PI * (double) (2*(i+24)+19) / 72.0 ); | |
| 134 win[1][i+30] = win[3][i] = 0.0; | |
| 135 win[3][i+6 ] = 0.5 * sin( M_PI / 24.0 * (double) (2*i+1) ) / cos ( M_PI * (double) (2*(i+6 )+19) / 72.0 ); | |
| 136 } | |
| 137 | |
| 138 for(i=0;i<9;i++) | |
| 139 COS9[i] = cos( M_PI / 18.0 * (double) i); | |
| 140 | |
| 141 for(i=0;i<9;i++) | |
| 142 tfcos36[i] = 0.5 / cos ( M_PI * (double) (i*2+1) / 36.0 ); | |
| 143 for(i=0;i<3;i++) | |
| 144 tfcos12[i] = 0.5 / cos ( M_PI * (double) (i*2+1) / 12.0 ); | |
| 145 | |
| 146 COS6_1 = cos( M_PI / 6.0 * (double) 1); | |
| 147 COS6_2 = cos( M_PI / 6.0 * (double) 2); | |
| 148 | |
| 149 for(i=0;i<12;i++) | |
| 150 { | |
| 151 win[2][i] = 0.5 * sin( M_PI / 24.0 * (double) (2*i+1) ) / cos ( M_PI * (double) (2*i+7) / 24.0 ); | |
| 152 for(j=0;j<6;j++) | |
| 153 COS1[i][j] = cos( M_PI / 24.0 * (double) ((2*i+7)*(2*j+1)) ); | |
| 154 } | |
| 155 | |
| 156 for(j=0;j<4;j++) { | |
| 157 static int len[4] = { 36,36,12,36 }; | |
| 158 for(i=0;i<len[j];i+=2) | |
| 159 win1[j][i] = + win[j][i]; | |
| 160 for(i=1;i<len[j];i+=2) | |
| 161 win1[j][i] = - win[j][i]; | |
| 162 } | |
| 163 | |
| 164 for(i=0;i<16;i++) | |
| 165 { | |
| 166 double t = tan( (double) i * M_PI / 12.0 ); | |
| 167 tan1_1[i] = t / (1.0+t); | |
| 168 tan2_1[i] = 1.0 / (1.0 + t); | |
| 169 tan1_2[i] = M_SQRT2 * t / (1.0+t); | |
| 170 tan2_2[i] = M_SQRT2 / (1.0 + t); | |
| 171 | |
| 172 for(j=0;j<2;j++) { | |
| 173 double base = pow(2.0,-0.25*(j+1.0)); | |
| 174 double p1=1.0,p2=1.0; | |
| 175 if(i > 0) { | |
| 176 if( i & 1 ) | |
| 177 p1 = pow(base,(i+1.0)*0.5); | |
| 178 else | |
| 179 p2 = pow(base,i*0.5); | |
| 180 } | |
| 181 pow1_1[j][i] = p1; | |
| 182 pow2_1[j][i] = p2; | |
| 183 pow1_2[j][i] = M_SQRT2 * p1; | |
| 184 pow2_2[j][i] = M_SQRT2 * p2; | |
| 185 } | |
| 186 } | |
| 187 | |
| 188 for(j=0;j<9;j++) | |
| 189 { | |
| 190 struct bandInfoStruct *bi = &bandInfo[j]; | |
| 191 int *mp; | |
| 192 int cb,lwin; | |
| 193 short *bdf; | |
| 194 | |
| 195 mp = map[j][0] = mapbuf0[j]; | |
| 196 bdf = bi->longDiff; | |
| 197 for(i=0,cb = 0; cb < 8 ; cb++,i+=*bdf++) { | |
| 198 *mp++ = (*bdf) >> 1; | |
| 199 *mp++ = i; | |
| 200 *mp++ = 3; | |
| 201 *mp++ = cb; | |
| 202 } | |
| 203 bdf = bi->shortDiff+3; | |
| 204 for(cb=3;cb<13;cb++) { | |
| 205 int l = (*bdf++) >> 1; | |
| 206 for(lwin=0;lwin<3;lwin++) { | |
| 207 *mp++ = l; | |
| 208 *mp++ = i + lwin; | |
| 209 *mp++ = lwin; | |
| 210 *mp++ = cb; | |
| 211 } | |
| 212 i += 6*l; | |
| 213 } | |
| 214 mapend[j][0] = mp; | |
| 215 | |
| 216 mp = map[j][1] = mapbuf1[j]; | |
| 217 bdf = bi->shortDiff+0; | |
| 218 for(i=0,cb=0;cb<13;cb++) { | |
| 219 int l = (*bdf++) >> 1; | |
| 220 for(lwin=0;lwin<3;lwin++) { | |
| 221 *mp++ = l; | |
| 222 *mp++ = i + lwin; | |
| 223 *mp++ = lwin; | |
| 224 *mp++ = cb; | |
| 225 } | |
| 226 i += 6*l; | |
| 227 } | |
| 228 mapend[j][1] = mp; | |
| 229 | |
| 230 mp = map[j][2] = mapbuf2[j]; | |
| 231 bdf = bi->longDiff; | |
| 232 for(cb = 0; cb < 22 ; cb++) { | |
| 233 *mp++ = (*bdf++) >> 1; | |
| 234 *mp++ = cb; | |
| 235 } | |
| 236 mapend[j][2] = mp; | |
| 237 | |
| 238 } | |
| 239 | |
| 240 for(j=0;j<9;j++) { | |
| 241 for(i=0;i<23;i++) { | |
| 242 longLimit[j][i] = (bandInfo[j].longIdx[i] - 1 + 8) / 18 + 1; | |
| 243 if(longLimit[j][i] > (down_sample_sblimit) ) | |
| 244 longLimit[j][i] = down_sample_sblimit; | |
| 245 } | |
| 246 for(i=0;i<14;i++) { | |
| 247 shortLimit[j][i] = (bandInfo[j].shortIdx[i] - 1) / 18 + 1; | |
| 248 if(shortLimit[j][i] > (down_sample_sblimit) ) | |
| 249 shortLimit[j][i] = down_sample_sblimit; | |
| 250 } | |
| 251 } | |
| 252 | |
| 253 for(i=0;i<5;i++) { | |
| 254 for(j=0;j<6;j++) { | |
| 255 for(k=0;k<6;k++) { | |
| 256 int n = k + j * 6 + i * 36; | |
| 257 i_slen2[n] = i|(j<<3)|(k<<6)|(3<<12); | |
| 258 } | |
| 259 } | |
| 260 } | |
| 261 for(i=0;i<4;i++) { | |
| 262 for(j=0;j<4;j++) { | |
| 263 for(k=0;k<4;k++) { | |
| 264 int n = k + j * 4 + i * 16; | |
| 265 i_slen2[n+180] = i|(j<<3)|(k<<6)|(4<<12); | |
| 266 } | |
| 267 } | |
| 268 } | |
| 269 for(i=0;i<4;i++) { | |
| 270 for(j=0;j<3;j++) { | |
| 271 int n = j + i * 3; | |
| 272 i_slen2[n+244] = i|(j<<3) | (5<<12); | |
| 273 n_slen2[n+500] = i|(j<<3) | (2<<12) | (1<<15); | |
| 274 } | |
| 275 } | |
| 276 | |
| 277 for(i=0;i<5;i++) { | |
| 278 for(j=0;j<5;j++) { | |
| 279 for(k=0;k<4;k++) { | |
| 280 for(l=0;l<4;l++) { | |
| 281 int n = l + k * 4 + j * 16 + i * 80; | |
| 282 n_slen2[n] = i|(j<<3)|(k<<6)|(l<<9)|(0<<12); | |
| 283 } | |
| 284 } | |
| 285 } | |
| 286 } | |
| 287 for(i=0;i<5;i++) { | |
| 288 for(j=0;j<5;j++) { | |
| 289 for(k=0;k<4;k++) { | |
| 290 int n = k + j * 4 + i * 20; | |
| 291 n_slen2[n+400] = i|(j<<3)|(k<<6)|(1<<12); | |
| 292 } | |
| 293 } | |
| 294 } | |
| 295 } | |
| 296 | |
| 297 /* | |
| 298 * read additional side information | |
| 299 */ | |
| 300 #ifdef MPEG1 | |
| 301 static int III_get_side_info_1(struct III_sideinfo *si,int stereo, | |
| 302 int ms_stereo,long sfreq,int single) | |
| 303 { | |
| 304 int ch, gr; | |
| 305 int powdiff = (single == 3) ? 4 : 0; | |
| 306 | |
| 307 si->main_data_begin = getbits(9); | |
| 308 if (stereo == 1) | |
| 309 si->private_bits = getbits_fast(5); | |
| 310 else | |
| 311 si->private_bits = getbits_fast(3); | |
| 312 | |
| 313 for (ch=0; ch<stereo; ch++) { | |
| 314 si->ch[ch].gr[0].scfsi = -1; | |
| 315 si->ch[ch].gr[1].scfsi = getbits_fast(4); | |
| 316 } | |
| 317 | |
| 318 for (gr=0; gr<2; gr++) | |
| 319 { | |
| 320 for (ch=0; ch<stereo; ch++) | |
| 321 { | |
| 322 register struct gr_info_s *gr_info = &(si->ch[ch].gr[gr]); | |
| 323 | |
| 324 gr_info->part2_3_length = getbits(12); | |
| 325 gr_info->big_values = getbits_fast(9); | |
| 326 if(gr_info->big_values > 288) { | |
|
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327 SNDDBG(("MPGLIB: big_values too large!\n")); |
| 261 | 328 gr_info->big_values = 288; |
| 329 } | |
| 330 gr_info->pow2gain = gainpow2+256 - getbits_fast(8) + powdiff; | |
| 331 if(ms_stereo) | |
| 332 gr_info->pow2gain += 2; | |
| 333 gr_info->scalefac_compress = getbits_fast(4); | |
| 334 /* window-switching flag == 1 for block_Type != 0 .. and block-type == 0 -> win-sw-flag = 0 */ | |
| 335 if(get1bit()) | |
| 336 { | |
| 337 int i; | |
| 338 gr_info->block_type = getbits_fast(2); | |
| 339 gr_info->mixed_block_flag = get1bit(); | |
| 340 gr_info->table_select[0] = getbits_fast(5); | |
| 341 gr_info->table_select[1] = getbits_fast(5); | |
| 342 /* | |
| 343 * table_select[2] not needed, because there is no region2, | |
| 344 * but to satisfy some verifications tools we set it either. | |
| 345 */ | |
| 346 gr_info->table_select[2] = 0; | |
| 347 for(i=0;i<3;i++) | |
| 348 gr_info->full_gain[i] = gr_info->pow2gain + (getbits_fast(3)<<3); | |
| 349 | |
| 350 if(gr_info->block_type == 0) { | |
|
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Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL*_MACRO)
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351 BAIL_MACRO("MPGLIB: Blocktype == 0 and window-switching == 1 not allowed.", 0); |
| 261 | 352 } |
| 353 /* region_count/start parameters are implicit in this case. */ | |
| 354 gr_info->region1start = 36>>1; | |
| 355 gr_info->region2start = 576>>1; | |
| 356 } | |
| 357 else | |
| 358 { | |
| 359 int i,r0c,r1c; | |
| 360 for (i=0; i<3; i++) | |
| 361 gr_info->table_select[i] = getbits_fast(5); | |
| 362 r0c = getbits_fast(4); | |
| 363 r1c = getbits_fast(3); | |
| 364 gr_info->region1start = bandInfo[sfreq].longIdx[r0c+1] >> 1 ; | |
| 365 gr_info->region2start = bandInfo[sfreq].longIdx[r0c+1+r1c+1] >> 1; | |
| 366 gr_info->block_type = 0; | |
| 367 gr_info->mixed_block_flag = 0; | |
| 368 } | |
| 369 gr_info->preflag = get1bit(); | |
| 370 gr_info->scalefac_scale = get1bit(); | |
| 371 gr_info->count1table_select = get1bit(); | |
| 372 } | |
| 373 } | |
| 374 return !0; | |
| 375 } | |
| 376 #endif | |
| 377 | |
| 378 /* | |
| 379 * Side Info for MPEG 2.0 / LSF | |
| 380 */ | |
| 381 static int III_get_side_info_2(struct III_sideinfo *si,int stereo, | |
| 382 int ms_stereo,long sfreq,int single) | |
| 383 { | |
| 384 int ch; | |
| 385 int powdiff = (single == 3) ? 4 : 0; | |
| 386 | |
| 387 si->main_data_begin = getbits(8); | |
| 388 if (stereo == 1) | |
| 389 si->private_bits = get1bit(); | |
| 390 else | |
| 391 si->private_bits = getbits_fast(2); | |
| 392 | |
| 393 for (ch=0; ch<stereo; ch++) | |
| 394 { | |
| 395 register struct gr_info_s *gr_info = &(si->ch[ch].gr[0]); | |
| 396 | |
| 397 gr_info->part2_3_length = getbits(12); | |
| 398 gr_info->big_values = getbits_fast(9); | |
| 399 if(gr_info->big_values > 288) { | |
|
299
7b1df7526915
Patches for Visual C compatibility.
Ryan C. Gordon <icculus@icculus.org>
parents:
281
diff
changeset
|
400 SNDDBG(("MPGLIB: big_values too large!\n")); |
| 261 | 401 gr_info->big_values = 288; |
| 402 } | |
| 403 gr_info->pow2gain = gainpow2+256 - getbits_fast(8) + powdiff; | |
| 404 if(ms_stereo) | |
| 405 gr_info->pow2gain += 2; | |
| 406 gr_info->scalefac_compress = getbits(9); | |
| 407 /* window-switching flag == 1 for block_Type != 0 .. and block-type == 0 -> win-sw-flag = 0 */ | |
| 408 if(get1bit()) | |
| 409 { | |
| 410 int i; | |
| 411 gr_info->block_type = getbits_fast(2); | |
| 412 gr_info->mixed_block_flag = get1bit(); | |
| 413 gr_info->table_select[0] = getbits_fast(5); | |
| 414 gr_info->table_select[1] = getbits_fast(5); | |
| 415 /* | |
| 416 * table_select[2] not needed, because there is no region2, | |
| 417 * but to satisfy some verifications tools we set it either. | |
| 418 */ | |
| 419 gr_info->table_select[2] = 0; | |
| 420 for(i=0;i<3;i++) | |
| 421 gr_info->full_gain[i] = gr_info->pow2gain + (getbits_fast(3)<<3); | |
| 422 | |
| 423 if(gr_info->block_type == 0) { | |
|
387
fb519e6028e3
Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL*_MACRO)
Ryan C. Gordon <icculus@icculus.org>
parents:
299
diff
changeset
|
424 BAIL_MACRO("MPGLIB: Blocktype == 0 and window-switching == 1 not allowed.", 0); |
| 261 | 425 } |
| 426 /* region_count/start parameters are implicit in this case. */ | |
| 427 /* check this again! */ | |
| 428 if(gr_info->block_type == 2) | |
| 429 gr_info->region1start = 36>>1; | |
| 430 else if(sfreq == 8) | |
| 431 /* check this for 2.5 and sfreq=8 */ | |
| 432 gr_info->region1start = 108>>1; | |
| 433 else | |
| 434 gr_info->region1start = 54>>1; | |
| 435 gr_info->region2start = 576>>1; | |
| 436 } | |
| 437 else | |
| 438 { | |
| 439 int i,r0c,r1c; | |
| 440 for (i=0; i<3; i++) | |
| 441 gr_info->table_select[i] = getbits_fast(5); | |
| 442 r0c = getbits_fast(4); | |
| 443 r1c = getbits_fast(3); | |
| 444 gr_info->region1start = bandInfo[sfreq].longIdx[r0c+1] >> 1 ; | |
| 445 gr_info->region2start = bandInfo[sfreq].longIdx[r0c+1+r1c+1] >> 1; | |
| 446 gr_info->block_type = 0; | |
| 447 gr_info->mixed_block_flag = 0; | |
| 448 } | |
| 449 gr_info->scalefac_scale = get1bit(); | |
| 450 gr_info->count1table_select = get1bit(); | |
| 451 } | |
| 452 return !0; | |
| 453 } | |
| 454 | |
| 455 /* | |
| 456 * read scalefactors | |
| 457 */ | |
| 458 #ifdef MPEG1 | |
| 459 static int III_get_scale_factors_1(int *scf,struct gr_info_s *gr_info) | |
| 460 { | |
| 461 static const unsigned char slen[2][16] = { | |
| 462 {0, 0, 0, 0, 3, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4}, | |
| 463 {0, 1, 2, 3, 0, 1, 2, 3, 1, 2, 3, 1, 2, 3, 2, 3} | |
| 464 }; | |
| 465 int numbits; | |
| 466 int num0 = slen[0][gr_info->scalefac_compress]; | |
| 467 int num1 = slen[1][gr_info->scalefac_compress]; | |
| 468 | |
| 469 if (gr_info->block_type == 2) { | |
| 470 int i=18; | |
| 471 numbits = (num0 + num1) * 18; | |
| 472 | |
| 473 if (gr_info->mixed_block_flag) { | |
| 474 for (i=8;i;i--) | |
| 475 *scf++ = getbits_fast(num0); | |
| 476 i = 9; | |
| 477 numbits -= num0; /* num0 * 17 + num1 * 18 */ | |
| 478 } | |
| 479 | |
| 480 for (;i;i--) | |
| 481 *scf++ = getbits_fast(num0); | |
| 482 for (i = 18; i; i--) | |
| 483 *scf++ = getbits_fast(num1); | |
| 484 *scf++ = 0; *scf++ = 0; *scf++ = 0; /* short[13][0..2] = 0 */ | |
| 485 } | |
| 486 else { | |
| 487 int i; | |
| 488 int scfsi = gr_info->scfsi; | |
| 489 | |
| 490 if(scfsi < 0) { /* scfsi < 0 => granule == 0 */ | |
| 491 for(i=11;i;i--) | |
| 492 *scf++ = getbits_fast(num0); | |
| 493 for(i=10;i;i--) | |
| 494 *scf++ = getbits_fast(num1); | |
| 495 numbits = (num0 + num1) * 10 + num0; | |
| 496 *scf++ = 0; | |
| 497 } | |
| 498 else { | |
| 499 numbits = 0; | |
| 500 if(!(scfsi & 0x8)) { | |
| 501 for (i=0;i<6;i++) | |
| 502 *scf++ = getbits_fast(num0); | |
| 503 numbits += num0 * 6; | |
| 504 } | |
| 505 else { | |
| 506 scf += 6; | |
| 507 } | |
| 508 | |
| 509 if(!(scfsi & 0x4)) { | |
| 510 for (i=0;i<5;i++) | |
| 511 *scf++ = getbits_fast(num0); | |
| 512 numbits += num0 * 5; | |
| 513 } | |
| 514 else { | |
| 515 scf += 5; | |
| 516 } | |
| 517 | |
| 518 if(!(scfsi & 0x2)) { | |
| 519 for(i=0;i<5;i++) | |
| 520 *scf++ = getbits_fast(num1); | |
| 521 numbits += num1 * 5; | |
| 522 } | |
| 523 else { | |
| 524 scf += 5; | |
| 525 } | |
| 526 | |
| 527 if(!(scfsi & 0x1)) { | |
| 528 for (i=0;i<5;i++) | |
| 529 *scf++ = getbits_fast(num1); | |
| 530 numbits += num1 * 5; | |
| 531 } | |
| 532 else { | |
| 533 scf += 5; | |
| 534 } | |
| 535 *scf++ = 0; /* no l[21] in original sources */ | |
| 536 } | |
| 537 } | |
| 538 return numbits; | |
| 539 } | |
| 540 #endif | |
| 541 | |
| 542 | |
| 543 static int III_get_scale_factors_2(int *scf,struct gr_info_s *gr_info,int i_stereo) | |
| 544 { | |
| 545 unsigned char *pnt; | |
| 546 int i,j; | |
| 547 unsigned int slen; | |
| 548 int n = 0; | |
| 549 int numbits = 0; | |
| 550 | |
| 551 static unsigned char stab[3][6][4] = { | |
| 552 { { 6, 5, 5,5 } , { 6, 5, 7,3 } , { 11,10,0,0} , | |
| 553 { 7, 7, 7,0 } , { 6, 6, 6,3 } , { 8, 8,5,0} } , | |
| 554 { { 9, 9, 9,9 } , { 9, 9,12,6 } , { 18,18,0,0} , | |
| 555 {12,12,12,0 } , {12, 9, 9,6 } , { 15,12,9,0} } , | |
| 556 { { 6, 9, 9,9 } , { 6, 9,12,6 } , { 15,18,0,0} , | |
| 557 { 6,15,12,0 } , { 6,12, 9,6 } , { 6,18,9,0} } }; | |
| 558 | |
| 559 if(i_stereo) /* i_stereo AND second channel -> do_layer3() checks this */ | |
| 560 slen = i_slen2[gr_info->scalefac_compress>>1]; | |
| 561 else | |
| 562 slen = n_slen2[gr_info->scalefac_compress]; | |
| 563 | |
| 564 gr_info->preflag = (slen>>15) & 0x1; | |
| 565 | |
| 566 n = 0; | |
| 567 if( gr_info->block_type == 2 ) { | |
| 568 n++; | |
| 569 if(gr_info->mixed_block_flag) | |
| 570 n++; | |
| 571 } | |
| 572 | |
| 573 pnt = stab[n][(slen>>12)&0x7]; | |
| 574 | |
| 575 for(i=0;i<4;i++) { | |
| 576 int num = slen & 0x7; | |
| 577 slen >>= 3; | |
| 578 if(num) { | |
| 579 for(j=0;j<(int)(pnt[i]);j++) | |
| 580 *scf++ = getbits_fast(num); | |
| 581 numbits += pnt[i] * num; | |
| 582 } | |
| 583 else { | |
| 584 for(j=0;j<(int)(pnt[i]);j++) | |
| 585 *scf++ = 0; | |
| 586 } | |
| 587 } | |
| 588 | |
| 589 n = (n << 1) + 1; | |
| 590 for(i=0;i<n;i++) | |
| 591 *scf++ = 0; | |
| 592 | |
| 593 return numbits; | |
| 594 } | |
| 595 | |
| 596 static int pretab1[22] = {0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,2,2,3,3,3,2,0}; | |
| 597 static int pretab2[22] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; | |
| 598 | |
| 599 /* | |
| 600 * don't forget to apply the same changes to III_dequantize_sample_ms() !!! | |
| 601 */ | |
| 602 static int III_dequantize_sample(real xr[SBLIMIT][SSLIMIT],int *scf, | |
| 603 struct gr_info_s *gr_info,int sfreq,int part2bits) | |
| 604 { | |
| 605 int shift = 1 + gr_info->scalefac_scale; | |
| 606 real *xrpnt = (real *) xr; | |
| 607 int l[3],l3; | |
| 608 int part2remain = gr_info->part2_3_length - part2bits; | |
| 609 int *me; | |
| 610 | |
| 611 { | |
| 612 int bv = gr_info->big_values; | |
| 613 int region1 = gr_info->region1start; | |
| 614 int region2 = gr_info->region2start; | |
| 615 | |
| 616 l3 = ((576>>1)-bv)>>1; | |
| 617 /* | |
| 618 * we may lose the 'odd' bit here !! | |
| 619 * check this later again | |
| 620 */ | |
| 621 if(bv <= region1) { | |
| 622 l[0] = bv; l[1] = 0; l[2] = 0; | |
| 623 } | |
| 624 else { | |
| 625 l[0] = region1; | |
| 626 if(bv <= region2) { | |
| 627 l[1] = bv - l[0]; l[2] = 0; | |
| 628 } | |
| 629 else { | |
| 630 l[1] = region2 - l[0]; l[2] = bv - region2; | |
| 631 } | |
| 632 } | |
| 633 } | |
| 634 | |
| 635 if(gr_info->block_type == 2) { | |
| 636 /* | |
| 637 * decoding with short or mixed mode BandIndex table | |
| 638 */ | |
| 639 int i,max[4]; | |
| 640 int step=0,lwin=0,cb=0; | |
| 641 register real v = 0.0; | |
| 642 register int *m,mc; | |
| 643 | |
| 644 if(gr_info->mixed_block_flag) { | |
| 645 max[3] = -1; | |
| 646 max[0] = max[1] = max[2] = 2; | |
| 647 m = map[sfreq][0]; | |
| 648 me = mapend[sfreq][0]; | |
| 649 } | |
| 650 else { | |
| 651 max[0] = max[1] = max[2] = max[3] = -1; | |
| 652 /* max[3] not really needed in this case */ | |
| 653 m = map[sfreq][1]; | |
| 654 me = mapend[sfreq][1]; | |
| 655 } | |
| 656 | |
| 657 mc = 0; | |
| 658 for(i=0;i<2;i++) { | |
| 659 int lp = l[i]; | |
| 660 struct newhuff *h = ht+gr_info->table_select[i]; | |
| 661 for(;lp;lp--,mc--) { | |
| 662 register int x,y; | |
| 663 if( (!mc) ) { | |
| 664 mc = *m++; | |
| 665 xrpnt = ((real *) xr) + (*m++); | |
| 666 lwin = *m++; | |
| 667 cb = *m++; | |
| 668 if(lwin == 3) { | |
| 669 v = gr_info->pow2gain[(*scf++) << shift]; | |
| 670 step = 1; | |
| 671 } | |
| 672 else { | |
| 673 v = gr_info->full_gain[lwin][(*scf++) << shift]; | |
| 674 step = 3; | |
| 675 } | |
| 676 } | |
| 677 { | |
| 678 register short *val = h->table; | |
| 679 while((y=*val++)<0) { | |
| 680 if (get1bit()) | |
| 681 val -= y; | |
| 682 part2remain--; | |
| 683 } | |
| 684 x = y >> 4; | |
| 685 y &= 0xf; | |
| 686 } | |
| 687 if(x == 15) { | |
| 688 max[lwin] = cb; | |
| 689 part2remain -= h->linbits+1; | |
| 690 x += getbits(h->linbits); | |
| 691 if(get1bit()) | |
| 692 *xrpnt = -ispow[x] * v; | |
| 693 else | |
| 694 *xrpnt = ispow[x] * v; | |
| 695 } | |
| 696 else if(x) { | |
| 697 max[lwin] = cb; | |
| 698 if(get1bit()) | |
| 699 *xrpnt = -ispow[x] * v; | |
| 700 else | |
| 701 *xrpnt = ispow[x] * v; | |
| 702 part2remain--; | |
| 703 } | |
| 704 else | |
| 705 *xrpnt = 0.0; | |
| 706 xrpnt += step; | |
| 707 if(y == 15) { | |
| 708 max[lwin] = cb; | |
| 709 part2remain -= h->linbits+1; | |
| 710 y += getbits(h->linbits); | |
| 711 if(get1bit()) | |
| 712 *xrpnt = -ispow[y] * v; | |
| 713 else | |
| 714 *xrpnt = ispow[y] * v; | |
| 715 } | |
| 716 else if(y) { | |
| 717 max[lwin] = cb; | |
| 718 if(get1bit()) | |
| 719 *xrpnt = -ispow[y] * v; | |
| 720 else | |
| 721 *xrpnt = ispow[y] * v; | |
| 722 part2remain--; | |
| 723 } | |
| 724 else | |
| 725 *xrpnt = 0.0; | |
| 726 xrpnt += step; | |
| 727 } | |
| 728 } | |
| 729 for(;l3 && (part2remain > 0);l3--) { | |
| 730 struct newhuff *h = htc+gr_info->count1table_select; | |
| 731 register short *val = h->table,a; | |
| 732 | |
| 733 while((a=*val++)<0) { | |
| 734 part2remain--; | |
| 735 if(part2remain < 0) { | |
| 736 part2remain++; | |
| 737 a = 0; | |
| 738 break; | |
| 739 } | |
| 740 if (get1bit()) | |
| 741 val -= a; | |
| 742 } | |
| 743 | |
| 744 for(i=0;i<4;i++) { | |
| 745 if(!(i & 1)) { | |
| 746 if(!mc) { | |
| 747 mc = *m++; | |
| 748 xrpnt = ((real *) xr) + (*m++); | |
| 749 lwin = *m++; | |
| 750 cb = *m++; | |
| 751 if(lwin == 3) { | |
| 752 v = gr_info->pow2gain[(*scf++) << shift]; | |
| 753 step = 1; | |
| 754 } | |
| 755 else { | |
| 756 v = gr_info->full_gain[lwin][(*scf++) << shift]; | |
| 757 step = 3; | |
| 758 } | |
| 759 } | |
| 760 mc--; | |
| 761 } | |
| 762 if( (a & (0x8>>i)) ) { | |
| 763 max[lwin] = cb; | |
| 764 part2remain--; | |
| 765 if(part2remain < 0) { | |
| 766 part2remain++; | |
| 767 break; | |
| 768 } | |
| 769 if(get1bit()) | |
| 770 *xrpnt = -v; | |
| 771 else | |
| 772 *xrpnt = v; | |
| 773 } | |
| 774 else | |
| 775 *xrpnt = 0.0; | |
| 776 xrpnt += step; | |
| 777 } | |
| 778 } | |
| 779 | |
| 780 while( m < me ) { | |
| 781 if(!mc) { | |
| 782 mc = *m++; | |
| 783 xrpnt = ((real *) xr) + *m++; | |
| 784 if( (*m++) == 3) | |
| 785 step = 1; | |
| 786 else | |
| 787 step = 3; | |
| 788 m++; /* cb */ | |
| 789 } | |
| 790 mc--; | |
| 791 *xrpnt = 0.0; | |
| 792 xrpnt += step; | |
| 793 *xrpnt = 0.0; | |
| 794 xrpnt += step; | |
| 795 /* we could add a little opt. here: | |
| 796 * if we finished a band for window 3 or a long band | |
| 797 * further bands could copied in a simple loop without a | |
| 798 * special 'map' decoding | |
| 799 */ | |
| 800 } | |
| 801 | |
| 802 gr_info->maxband[0] = max[0]+1; | |
| 803 gr_info->maxband[1] = max[1]+1; | |
| 804 gr_info->maxband[2] = max[2]+1; | |
| 805 gr_info->maxbandl = max[3]+1; | |
| 806 | |
| 807 { | |
| 808 int rmax = max[0] > max[1] ? max[0] : max[1]; | |
| 809 rmax = (rmax > max[2] ? rmax : max[2]) + 1; | |
| 810 gr_info->maxb = rmax ? shortLimit[sfreq][rmax] : longLimit[sfreq][max[3]+1]; | |
| 811 } | |
| 812 | |
| 813 } | |
| 814 else { | |
| 815 /* | |
| 816 * decoding with 'long' BandIndex table (block_type != 2) | |
| 817 */ | |
| 818 int *pretab = gr_info->preflag ? pretab1 : pretab2; | |
| 819 int i,max = -1; | |
| 820 int cb = 0; | |
| 821 register int *m = map[sfreq][2]; | |
| 822 register real v = 0.0; | |
| 823 register int mc = 0; | |
| 824 #if 0 | |
| 825 me = mapend[sfreq][2]; | |
| 826 #endif | |
| 827 | |
| 828 /* | |
| 829 * long hash table values | |
| 830 */ | |
| 831 for(i=0;i<3;i++) { | |
| 832 int lp = l[i]; | |
| 833 struct newhuff *h = ht+gr_info->table_select[i]; | |
| 834 | |
| 835 for(;lp;lp--,mc--) { | |
| 836 int x,y; | |
| 837 | |
| 838 if(!mc) { | |
| 839 mc = *m++; | |
| 840 v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift]; | |
| 841 cb = *m++; | |
| 842 } | |
| 843 { | |
| 844 register short *val = h->table; | |
| 845 while((y=*val++)<0) { | |
| 846 if (get1bit()) | |
| 847 val -= y; | |
| 848 part2remain--; | |
| 849 } | |
| 850 x = y >> 4; | |
| 851 y &= 0xf; | |
| 852 } | |
| 853 if (x == 15) { | |
| 854 max = cb; | |
| 855 part2remain -= h->linbits+1; | |
| 856 x += getbits(h->linbits); | |
| 857 if(get1bit()) | |
| 858 *xrpnt++ = -ispow[x] * v; | |
| 859 else | |
| 860 *xrpnt++ = ispow[x] * v; | |
| 861 } | |
| 862 else if(x) { | |
| 863 max = cb; | |
| 864 if(get1bit()) | |
| 865 *xrpnt++ = -ispow[x] * v; | |
| 866 else | |
| 867 *xrpnt++ = ispow[x] * v; | |
| 868 part2remain--; | |
| 869 } | |
| 870 else | |
| 871 *xrpnt++ = 0.0; | |
| 872 | |
| 873 if (y == 15) { | |
| 874 max = cb; | |
| 875 part2remain -= h->linbits+1; | |
| 876 y += getbits(h->linbits); | |
| 877 if(get1bit()) | |
| 878 *xrpnt++ = -ispow[y] * v; | |
| 879 else | |
| 880 *xrpnt++ = ispow[y] * v; | |
| 881 } | |
| 882 else if(y) { | |
| 883 max = cb; | |
| 884 if(get1bit()) | |
| 885 *xrpnt++ = -ispow[y] * v; | |
| 886 else | |
| 887 *xrpnt++ = ispow[y] * v; | |
| 888 part2remain--; | |
| 889 } | |
| 890 else | |
| 891 *xrpnt++ = 0.0; | |
| 892 } | |
| 893 } | |
| 894 | |
| 895 /* | |
| 896 * short (count1table) values | |
| 897 */ | |
| 898 for(;l3 && (part2remain > 0);l3--) { | |
| 899 struct newhuff *h = htc+gr_info->count1table_select; | |
| 900 register short *val = h->table,a; | |
| 901 | |
| 902 while((a=*val++)<0) { | |
| 903 part2remain--; | |
| 904 if(part2remain < 0) { | |
| 905 part2remain++; | |
| 906 a = 0; | |
| 907 break; | |
| 908 } | |
| 909 if (get1bit()) | |
| 910 val -= a; | |
| 911 } | |
| 912 | |
| 913 for(i=0;i<4;i++) { | |
| 914 if(!(i & 1)) { | |
| 915 if(!mc) { | |
| 916 mc = *m++; | |
| 917 cb = *m++; | |
| 918 v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift]; | |
| 919 } | |
| 920 mc--; | |
| 921 } | |
| 922 if ( (a & (0x8>>i)) ) { | |
| 923 max = cb; | |
| 924 part2remain--; | |
| 925 if(part2remain < 0) { | |
| 926 part2remain++; | |
| 927 break; | |
| 928 } | |
| 929 if(get1bit()) | |
| 930 *xrpnt++ = -v; | |
| 931 else | |
| 932 *xrpnt++ = v; | |
| 933 } | |
| 934 else | |
| 935 *xrpnt++ = 0.0; | |
| 936 } | |
| 937 } | |
| 938 | |
| 939 /* | |
| 940 * zero part | |
| 941 */ | |
| 942 for(i=(&xr[SBLIMIT][0]-xrpnt)>>1;i;i--) { | |
| 943 *xrpnt++ = 0.0; | |
| 944 *xrpnt++ = 0.0; | |
| 945 } | |
| 946 | |
| 947 gr_info->maxbandl = max+1; | |
| 948 gr_info->maxb = longLimit[sfreq][gr_info->maxbandl]; | |
| 949 } | |
| 950 | |
| 951 while( part2remain > 16 ) { | |
| 952 getbits(16); /* Dismiss stuffing Bits */ | |
| 953 part2remain -= 16; | |
| 954 } | |
| 955 if(part2remain > 0) | |
| 956 getbits(part2remain); | |
| 957 else if(part2remain < 0) { | |
| 400 | 958 char err[128]; |
| 959 snprintf(err, sizeof (err), | |
| 960 "MPGLIB: Can't rewind stream by %d bits!", | |
| 961 -part2remain); | |
| 962 BAIL_MACRO(err, 1); /* -> error */ | |
| 261 | 963 } |
| 964 return 0; | |
| 965 } | |
| 966 | |
| 967 #if 0 | |
| 968 static int III_dequantize_sample_ms(real xr[2][SBLIMIT][SSLIMIT],int *scf, | |
| 969 struct gr_info_s *gr_info,int sfreq,int part2bits) | |
| 970 { | |
| 971 int shift = 1 + gr_info->scalefac_scale; | |
| 972 real *xrpnt = (real *) xr[1]; | |
| 973 real *xr0pnt = (real *) xr[0]; | |
| 974 int l[3],l3; | |
| 975 int part2remain = gr_info->part2_3_length - part2bits; | |
| 976 int *me; | |
| 977 | |
| 978 { | |
| 979 int bv = gr_info->big_values; | |
| 980 int region1 = gr_info->region1start; | |
| 981 int region2 = gr_info->region2start; | |
| 982 | |
| 983 l3 = ((576>>1)-bv)>>1; | |
| 984 /* | |
| 985 * we may lose the 'odd' bit here !! | |
| 986 * check this later gain | |
| 987 */ | |
| 988 if(bv <= region1) { | |
| 989 l[0] = bv; l[1] = 0; l[2] = 0; | |
| 990 } | |
| 991 else { | |
| 992 l[0] = region1; | |
| 993 if(bv <= region2) { | |
| 994 l[1] = bv - l[0]; l[2] = 0; | |
| 995 } | |
| 996 else { | |
| 997 l[1] = region2 - l[0]; l[2] = bv - region2; | |
| 998 } | |
| 999 } | |
| 1000 } | |
| 1001 | |
| 1002 if(gr_info->block_type == 2) { | |
| 1003 int i,max[4]; | |
| 1004 int step=0,lwin=0,cb=0; | |
| 1005 register real v = 0.0; | |
| 1006 register int *m,mc = 0; | |
| 1007 | |
| 1008 if(gr_info->mixed_block_flag) { | |
| 1009 max[3] = -1; | |
| 1010 max[0] = max[1] = max[2] = 2; | |
| 1011 m = map[sfreq][0]; | |
| 1012 me = mapend[sfreq][0]; | |
| 1013 } | |
| 1014 else { | |
| 1015 max[0] = max[1] = max[2] = max[3] = -1; | |
| 1016 /* max[3] not really needed in this case */ | |
| 1017 m = map[sfreq][1]; | |
| 1018 me = mapend[sfreq][1]; | |
| 1019 } | |
| 1020 | |
| 1021 for(i=0;i<2;i++) { | |
| 1022 int lp = l[i]; | |
| 1023 struct newhuff *h = ht+gr_info->table_select[i]; | |
| 1024 for(;lp;lp--,mc--) { | |
| 1025 int x,y; | |
| 1026 | |
| 1027 if(!mc) { | |
| 1028 mc = *m++; | |
| 1029 xrpnt = ((real *) xr[1]) + *m; | |
| 1030 xr0pnt = ((real *) xr[0]) + *m++; | |
| 1031 lwin = *m++; | |
| 1032 cb = *m++; | |
| 1033 if(lwin == 3) { | |
| 1034 v = gr_info->pow2gain[(*scf++) << shift]; | |
| 1035 step = 1; | |
| 1036 } | |
| 1037 else { | |
| 1038 v = gr_info->full_gain[lwin][(*scf++) << shift]; | |
| 1039 step = 3; | |
| 1040 } | |
| 1041 } | |
| 1042 { | |
| 1043 register short *val = h->table; | |
| 1044 while((y=*val++)<0) { | |
| 1045 if (get1bit()) | |
| 1046 val -= y; | |
| 1047 part2remain--; | |
| 1048 } | |
| 1049 x = y >> 4; | |
| 1050 y &= 0xf; | |
| 1051 } | |
| 1052 if(x == 15) { | |
| 1053 max[lwin] = cb; | |
| 1054 part2remain -= h->linbits+1; | |
| 1055 x += getbits(h->linbits); | |
| 1056 if(get1bit()) { | |
| 1057 real a = ispow[x] * v; | |
| 1058 *xrpnt = *xr0pnt + a; | |
| 1059 *xr0pnt -= a; | |
| 1060 } | |
| 1061 else { | |
| 1062 real a = ispow[x] * v; | |
| 1063 *xrpnt = *xr0pnt - a; | |
| 1064 *xr0pnt += a; | |
| 1065 } | |
| 1066 } | |
| 1067 else if(x) { | |
| 1068 max[lwin] = cb; | |
| 1069 if(get1bit()) { | |
| 1070 real a = ispow[x] * v; | |
| 1071 *xrpnt = *xr0pnt + a; | |
| 1072 *xr0pnt -= a; | |
| 1073 } | |
| 1074 else { | |
| 1075 real a = ispow[x] * v; | |
| 1076 *xrpnt = *xr0pnt - a; | |
| 1077 *xr0pnt += a; | |
| 1078 } | |
| 1079 part2remain--; | |
| 1080 } | |
| 1081 else | |
| 1082 *xrpnt = *xr0pnt; | |
| 1083 xrpnt += step; | |
| 1084 xr0pnt += step; | |
| 1085 | |
| 1086 if(y == 15) { | |
| 1087 max[lwin] = cb; | |
| 1088 part2remain -= h->linbits+1; | |
| 1089 y += getbits(h->linbits); | |
| 1090 if(get1bit()) { | |
| 1091 real a = ispow[y] * v; | |
| 1092 *xrpnt = *xr0pnt + a; | |
| 1093 *xr0pnt -= a; | |
| 1094 } | |
| 1095 else { | |
| 1096 real a = ispow[y] * v; | |
| 1097 *xrpnt = *xr0pnt - a; | |
| 1098 *xr0pnt += a; | |
| 1099 } | |
| 1100 } | |
| 1101 else if(y) { | |
| 1102 max[lwin] = cb; | |
| 1103 if(get1bit()) { | |
| 1104 real a = ispow[y] * v; | |
| 1105 *xrpnt = *xr0pnt + a; | |
| 1106 *xr0pnt -= a; | |
| 1107 } | |
| 1108 else { | |
| 1109 real a = ispow[y] * v; | |
| 1110 *xrpnt = *xr0pnt - a; | |
| 1111 *xr0pnt += a; | |
| 1112 } | |
| 1113 part2remain--; | |
| 1114 } | |
| 1115 else | |
| 1116 *xrpnt = *xr0pnt; | |
| 1117 xrpnt += step; | |
| 1118 xr0pnt += step; | |
| 1119 } | |
| 1120 } | |
| 1121 | |
| 1122 for(;l3 && (part2remain > 0);l3--) { | |
| 1123 struct newhuff *h = htc+gr_info->count1table_select; | |
| 1124 register short *val = h->table,a; | |
| 1125 | |
| 1126 while((a=*val++)<0) { | |
| 1127 part2remain--; | |
| 1128 if(part2remain < 0) { | |
| 1129 part2remain++; | |
| 1130 a = 0; | |
| 1131 break; | |
| 1132 } | |
| 1133 if (get1bit()) | |
| 1134 val -= a; | |
| 1135 } | |
| 1136 | |
| 1137 for(i=0;i<4;i++) { | |
| 1138 if(!(i & 1)) { | |
| 1139 if(!mc) { | |
| 1140 mc = *m++; | |
| 1141 xrpnt = ((real *) xr[1]) + *m; | |
| 1142 xr0pnt = ((real *) xr[0]) + *m++; | |
| 1143 lwin = *m++; | |
| 1144 cb = *m++; | |
| 1145 if(lwin == 3) { | |
| 1146 v = gr_info->pow2gain[(*scf++) << shift]; | |
| 1147 step = 1; | |
| 1148 } | |
| 1149 else { | |
| 1150 v = gr_info->full_gain[lwin][(*scf++) << shift]; | |
| 1151 step = 3; | |
| 1152 } | |
| 1153 } | |
| 1154 mc--; | |
| 1155 } | |
| 1156 if( (a & (0x8>>i)) ) { | |
| 1157 max[lwin] = cb; | |
| 1158 part2remain--; | |
| 1159 if(part2remain < 0) { | |
| 1160 part2remain++; | |
| 1161 break; | |
| 1162 } | |
| 1163 if(get1bit()) { | |
| 1164 *xrpnt = *xr0pnt + v; | |
| 1165 *xr0pnt -= v; | |
| 1166 } | |
| 1167 else { | |
| 1168 *xrpnt = *xr0pnt - v; | |
| 1169 *xr0pnt += v; | |
| 1170 } | |
| 1171 } | |
| 1172 else | |
| 1173 *xrpnt = *xr0pnt; | |
| 1174 xrpnt += step; | |
| 1175 xr0pnt += step; | |
| 1176 } | |
| 1177 } | |
| 1178 | |
| 1179 while( m < me ) { | |
| 1180 if(!mc) { | |
| 1181 mc = *m++; | |
| 1182 xrpnt = ((real *) xr[1]) + *m; | |
| 1183 xr0pnt = ((real *) xr[0]) + *m++; | |
| 1184 if(*m++ == 3) | |
| 1185 step = 1; | |
| 1186 else | |
| 1187 step = 3; | |
| 1188 m++; /* cb */ | |
| 1189 } | |
| 1190 mc--; | |
| 1191 *xrpnt = *xr0pnt; | |
| 1192 xrpnt += step; | |
| 1193 xr0pnt += step; | |
| 1194 *xrpnt = *xr0pnt; | |
| 1195 xrpnt += step; | |
| 1196 xr0pnt += step; | |
| 1197 /* we could add a little opt. here: | |
| 1198 * if we finished a band for window 3 or a long band | |
| 1199 * further bands could copied in a simple loop without a | |
| 1200 * special 'map' decoding | |
| 1201 */ | |
| 1202 } | |
| 1203 | |
| 1204 gr_info->maxband[0] = max[0]+1; | |
| 1205 gr_info->maxband[1] = max[1]+1; | |
| 1206 gr_info->maxband[2] = max[2]+1; | |
| 1207 gr_info->maxbandl = max[3]+1; | |
| 1208 | |
| 1209 { | |
| 1210 int rmax = max[0] > max[1] ? max[0] : max[1]; | |
| 1211 rmax = (rmax > max[2] ? rmax : max[2]) + 1; | |
| 1212 gr_info->maxb = rmax ? shortLimit[sfreq][rmax] : longLimit[sfreq][max[3]+1]; | |
| 1213 } | |
| 1214 } | |
| 1215 else { | |
| 1216 int *pretab = gr_info->preflag ? pretab1 : pretab2; | |
| 1217 int i,max = -1; | |
| 1218 int cb = 0; | |
| 1219 register int mc=0,*m = map[sfreq][2]; | |
| 1220 register real v = 0.0; | |
| 1221 #if 0 | |
| 1222 me = mapend[sfreq][2]; | |
| 1223 #endif | |
| 1224 | |
| 1225 for(i=0;i<3;i++) { | |
| 1226 int lp = l[i]; | |
| 1227 struct newhuff *h = ht+gr_info->table_select[i]; | |
| 1228 | |
| 1229 for(;lp;lp--,mc--) { | |
| 1230 int x,y; | |
| 1231 if(!mc) { | |
| 1232 mc = *m++; | |
| 1233 cb = *m++; | |
| 1234 v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift]; | |
| 1235 } | |
| 1236 { | |
| 1237 register short *val = h->table; | |
| 1238 while((y=*val++)<0) { | |
| 1239 if (get1bit()) | |
| 1240 val -= y; | |
| 1241 part2remain--; | |
| 1242 } | |
| 1243 x = y >> 4; | |
| 1244 y &= 0xf; | |
| 1245 } | |
| 1246 if (x == 15) { | |
| 1247 max = cb; | |
| 1248 part2remain -= h->linbits+1; | |
| 1249 x += getbits(h->linbits); | |
| 1250 if(get1bit()) { | |
| 1251 real a = ispow[x] * v; | |
| 1252 *xrpnt++ = *xr0pnt + a; | |
| 1253 *xr0pnt++ -= a; | |
| 1254 } | |
| 1255 else { | |
| 1256 real a = ispow[x] * v; | |
| 1257 *xrpnt++ = *xr0pnt - a; | |
| 1258 *xr0pnt++ += a; | |
| 1259 } | |
| 1260 } | |
| 1261 else if(x) { | |
| 1262 max = cb; | |
| 1263 if(get1bit()) { | |
| 1264 real a = ispow[x] * v; | |
| 1265 *xrpnt++ = *xr0pnt + a; | |
| 1266 *xr0pnt++ -= a; | |
| 1267 } | |
| 1268 else { | |
| 1269 real a = ispow[x] * v; | |
| 1270 *xrpnt++ = *xr0pnt - a; | |
| 1271 *xr0pnt++ += a; | |
| 1272 } | |
| 1273 part2remain--; | |
| 1274 } | |
| 1275 else | |
| 1276 *xrpnt++ = *xr0pnt++; | |
| 1277 | |
| 1278 if (y == 15) { | |
| 1279 max = cb; | |
| 1280 part2remain -= h->linbits+1; | |
| 1281 y += getbits(h->linbits); | |
| 1282 if(get1bit()) { | |
| 1283 real a = ispow[y] * v; | |
| 1284 *xrpnt++ = *xr0pnt + a; | |
| 1285 *xr0pnt++ -= a; | |
| 1286 } | |
| 1287 else { | |
| 1288 real a = ispow[y] * v; | |
| 1289 *xrpnt++ = *xr0pnt - a; | |
| 1290 *xr0pnt++ += a; | |
| 1291 } | |
| 1292 } | |
| 1293 else if(y) { | |
| 1294 max = cb; | |
| 1295 if(get1bit()) { | |
| 1296 real a = ispow[y] * v; | |
| 1297 *xrpnt++ = *xr0pnt + a; | |
| 1298 *xr0pnt++ -= a; | |
| 1299 } | |
| 1300 else { | |
| 1301 real a = ispow[y] * v; | |
| 1302 *xrpnt++ = *xr0pnt - a; | |
| 1303 *xr0pnt++ += a; | |
| 1304 } | |
| 1305 part2remain--; | |
| 1306 } | |
| 1307 else | |
| 1308 *xrpnt++ = *xr0pnt++; | |
| 1309 } | |
| 1310 } | |
| 1311 | |
| 1312 for(;l3 && (part2remain > 0);l3--) { | |
| 1313 struct newhuff *h = htc+gr_info->count1table_select; | |
| 1314 register short *val = h->table,a; | |
| 1315 | |
| 1316 while((a=*val++)<0) { | |
| 1317 part2remain--; | |
| 1318 if(part2remain < 0) { | |
| 1319 part2remain++; | |
| 1320 a = 0; | |
| 1321 break; | |
| 1322 } | |
| 1323 if (get1bit()) | |
| 1324 val -= a; | |
| 1325 } | |
| 1326 | |
| 1327 for(i=0;i<4;i++) { | |
| 1328 if(!(i & 1)) { | |
| 1329 if(!mc) { | |
| 1330 mc = *m++; | |
| 1331 cb = *m++; | |
| 1332 v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift]; | |
| 1333 } | |
| 1334 mc--; | |
| 1335 } | |
| 1336 if ( (a & (0x8>>i)) ) { | |
| 1337 max = cb; | |
| 1338 part2remain--; | |
| 1339 if(part2remain <= 0) { | |
| 1340 part2remain++; | |
| 1341 break; | |
| 1342 } | |
| 1343 if(get1bit()) { | |
| 1344 *xrpnt++ = *xr0pnt + v; | |
| 1345 *xr0pnt++ -= v; | |
| 1346 } | |
| 1347 else { | |
| 1348 *xrpnt++ = *xr0pnt - v; | |
| 1349 *xr0pnt++ += v; | |
| 1350 } | |
| 1351 } | |
| 1352 else | |
| 1353 *xrpnt++ = *xr0pnt++; | |
| 1354 } | |
| 1355 } | |
| 1356 for(i=(&xr[1][SBLIMIT][0]-xrpnt)>>1;i;i--) { | |
| 1357 *xrpnt++ = *xr0pnt++; | |
| 1358 *xrpnt++ = *xr0pnt++; | |
| 1359 } | |
| 1360 | |
| 1361 gr_info->maxbandl = max+1; | |
| 1362 gr_info->maxb = longLimit[sfreq][gr_info->maxbandl]; | |
| 1363 } | |
| 1364 | |
| 1365 while ( part2remain > 16 ) { | |
| 1366 getbits(16); /* Dismiss stuffing Bits */ | |
| 1367 part2remain -= 16; | |
| 1368 } | |
| 1369 if(part2remain > 0 ) | |
| 1370 getbits(part2remain); | |
| 1371 else if(part2remain < 0) { | |
| 400 | 1372 char err[128]; |
| 1373 snprintf(err, sizeof (err), | |
| 1374 "MPGLIB: Can't rewind stream by %d bits!", | |
| 1375 -part2remain); | |
| 1376 BAIL_MACRO(err, 1); /* -> error */ | |
| 261 | 1377 } |
| 1378 return 0; | |
| 1379 } | |
| 1380 #endif | |
| 1381 | |
| 1382 /* | |
| 1383 * III_stereo: calculate real channel values for Joint-I-Stereo-mode | |
| 1384 */ | |
| 1385 static void III_i_stereo(real xr_buf[2][SBLIMIT][SSLIMIT],int *scalefac, | |
| 1386 struct gr_info_s *gr_info,int sfreq,int ms_stereo,int lsf) | |
| 1387 { | |
| 1388 real (*xr)[SBLIMIT*SSLIMIT] = (real (*)[SBLIMIT*SSLIMIT] ) xr_buf; | |
| 1389 struct bandInfoStruct *bi = &bandInfo[sfreq]; | |
| 1390 real *tab1,*tab2; | |
| 1391 | |
| 1392 if(lsf) { | |
| 1393 int p = gr_info->scalefac_compress & 0x1; | |
| 1394 if(ms_stereo) { | |
| 1395 tab1 = pow1_2[p]; tab2 = pow2_2[p]; | |
| 1396 } | |
| 1397 else { | |
| 1398 tab1 = pow1_1[p]; tab2 = pow2_1[p]; | |
| 1399 } | |
| 1400 } | |
| 1401 else { | |
| 1402 if(ms_stereo) { | |
| 1403 tab1 = tan1_2; tab2 = tan2_2; | |
| 1404 } | |
| 1405 else { | |
| 1406 tab1 = tan1_1; tab2 = tan2_1; | |
| 1407 } | |
| 1408 } | |
| 1409 | |
| 1410 if (gr_info->block_type == 2) | |
| 1411 { | |
| 1412 int lwin,do_l = 0; | |
| 1413 if( gr_info->mixed_block_flag ) | |
| 1414 do_l = 1; | |
| 1415 | |
| 1416 for (lwin=0;lwin<3;lwin++) /* process each window */ | |
| 1417 { | |
| 1418 /* get first band with zero values */ | |
| 1419 int is_p,sb,idx,sfb = gr_info->maxband[lwin]; /* sfb is minimal 3 for mixed mode */ | |
| 1420 if(sfb > 3) | |
| 1421 do_l = 0; | |
| 1422 | |
| 1423 for(;sfb<12;sfb++) | |
| 1424 { | |
| 1425 is_p = scalefac[sfb*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */ | |
| 1426 if(is_p != 7) { | |
| 1427 real t1,t2; | |
| 1428 sb = bi->shortDiff[sfb]; | |
| 1429 idx = bi->shortIdx[sfb] + lwin; | |
| 1430 t1 = tab1[is_p]; t2 = tab2[is_p]; | |
| 1431 for (; sb > 0; sb--,idx+=3) | |
| 1432 { | |
| 1433 real v = xr[0][idx]; | |
| 1434 xr[0][idx] = v * t1; | |
| 1435 xr[1][idx] = v * t2; | |
| 1436 } | |
| 1437 } | |
| 1438 } | |
| 1439 | |
| 1440 #if 1 | |
| 1441 /* in the original: copy 10 to 11 , here: copy 11 to 12 | |
| 1442 maybe still wrong??? (copy 12 to 13?) */ | |
| 1443 is_p = scalefac[11*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */ | |
| 1444 sb = bi->shortDiff[12]; | |
| 1445 idx = bi->shortIdx[12] + lwin; | |
| 1446 #else | |
| 1447 is_p = scalefac[10*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */ | |
| 1448 sb = bi->shortDiff[11]; | |
| 1449 idx = bi->shortIdx[11] + lwin; | |
| 1450 #endif | |
| 1451 if(is_p != 7) | |
| 1452 { | |
| 1453 real t1,t2; | |
| 1454 t1 = tab1[is_p]; t2 = tab2[is_p]; | |
| 1455 for ( ; sb > 0; sb--,idx+=3 ) | |
| 1456 { | |
| 1457 real v = xr[0][idx]; | |
| 1458 xr[0][idx] = v * t1; | |
| 1459 xr[1][idx] = v * t2; | |
| 1460 } | |
| 1461 } | |
| 1462 } /* end for(lwin; .. ; . ) */ | |
| 1463 | |
| 1464 if (do_l) | |
| 1465 { | |
| 1466 /* also check l-part, if ALL bands in the three windows are 'empty' | |
| 1467 * and mode = mixed_mode | |
| 1468 */ | |
| 1469 int sfb = gr_info->maxbandl; | |
| 1470 int idx = bi->longIdx[sfb]; | |
| 1471 | |
| 1472 for ( ; sfb<8; sfb++ ) | |
| 1473 { | |
| 1474 int sb = bi->longDiff[sfb]; | |
| 1475 int is_p = scalefac[sfb]; /* scale: 0-15 */ | |
| 1476 if(is_p != 7) { | |
| 1477 real t1,t2; | |
| 1478 t1 = tab1[is_p]; t2 = tab2[is_p]; | |
| 1479 for ( ; sb > 0; sb--,idx++) | |
| 1480 { | |
| 1481 real v = xr[0][idx]; | |
| 1482 xr[0][idx] = v * t1; | |
| 1483 xr[1][idx] = v * t2; | |
| 1484 } | |
| 1485 } | |
| 1486 else | |
| 1487 idx += sb; | |
| 1488 } | |
| 1489 } | |
| 1490 } | |
| 1491 else /* ((gr_info->block_type != 2)) */ | |
| 1492 { | |
| 1493 int sfb = gr_info->maxbandl; | |
| 1494 int is_p,idx = bi->longIdx[sfb]; | |
| 1495 for ( ; sfb<21; sfb++) | |
| 1496 { | |
| 1497 int sb = bi->longDiff[sfb]; | |
| 1498 is_p = scalefac[sfb]; /* scale: 0-15 */ | |
| 1499 if(is_p != 7) { | |
| 1500 real t1,t2; | |
| 1501 t1 = tab1[is_p]; t2 = tab2[is_p]; | |
| 1502 for ( ; sb > 0; sb--,idx++) | |
| 1503 { | |
| 1504 real v = xr[0][idx]; | |
| 1505 xr[0][idx] = v * t1; | |
| 1506 xr[1][idx] = v * t2; | |
| 1507 } | |
| 1508 } | |
| 1509 else | |
| 1510 idx += sb; | |
| 1511 } | |
| 1512 | |
| 1513 is_p = scalefac[20]; /* copy l-band 20 to l-band 21 */ | |
| 1514 if(is_p != 7) | |
| 1515 { | |
| 1516 int sb; | |
| 1517 real t1 = tab1[is_p],t2 = tab2[is_p]; | |
| 1518 | |
| 1519 for ( sb = bi->longDiff[21]; sb > 0; sb--,idx++ ) | |
| 1520 { | |
| 1521 real v = xr[0][idx]; | |
| 1522 xr[0][idx] = v * t1; | |
| 1523 xr[1][idx] = v * t2; | |
| 1524 } | |
| 1525 } | |
| 1526 } /* ... */ | |
| 1527 } | |
| 1528 | |
| 1529 static void III_antialias(real xr[SBLIMIT][SSLIMIT],struct gr_info_s *gr_info) | |
| 1530 { | |
| 1531 int sblim; | |
| 1532 | |
| 1533 if(gr_info->block_type == 2) | |
| 1534 { | |
| 1535 if(!gr_info->mixed_block_flag) | |
| 1536 return; | |
| 1537 sblim = 1; | |
| 1538 } | |
| 1539 else { | |
| 1540 sblim = gr_info->maxb-1; | |
| 1541 } | |
| 1542 | |
| 1543 /* 31 alias-reduction operations between each pair of sub-bands */ | |
| 1544 /* with 8 butterflies between each pair */ | |
| 1545 | |
| 1546 { | |
| 1547 int sb; | |
| 1548 real *xr1=(real *) xr[1]; | |
| 1549 | |
| 1550 for(sb=sblim;sb;sb--,xr1+=10) | |
| 1551 { | |
| 1552 int ss; | |
| 1553 real *cs=aa_cs,*ca=aa_ca; | |
| 1554 real *xr2 = xr1; | |
| 1555 | |
| 1556 for(ss=7;ss>=0;ss--) | |
| 1557 { /* upper and lower butterfly inputs */ | |
| 1558 register real bu = *--xr2,bd = *xr1; | |
| 1559 *xr2 = (bu * (*cs) ) - (bd * (*ca) ); | |
| 1560 *xr1++ = (bd * (*cs++) ) + (bu * (*ca++) ); | |
| 1561 } | |
| 1562 } | |
| 1563 } | |
| 1564 } | |
| 1565 | |
| 1566 /* | |
| 1567 DCT insipired by Jeff Tsay's DCT from the maplay package | |
| 1568 this is an optimized version with manual unroll. | |
| 1569 | |
| 1570 References: | |
| 1571 [1] S. Winograd: "On Computing the Discrete Fourier Transform", | |
| 1572 Mathematics of Computation, Volume 32, Number 141, January 1978, | |
| 1573 Pages 175-199 | |
| 1574 */ | |
| 1575 | |
| 1576 static void dct36(real *inbuf,real *o1,real *o2,real *wintab,real *tsbuf) | |
| 1577 { | |
| 1578 { | |
| 1579 register real *in = inbuf; | |
| 1580 | |
| 1581 in[17]+=in[16]; in[16]+=in[15]; in[15]+=in[14]; | |
| 1582 in[14]+=in[13]; in[13]+=in[12]; in[12]+=in[11]; | |
| 1583 in[11]+=in[10]; in[10]+=in[9]; in[9] +=in[8]; | |
| 1584 in[8] +=in[7]; in[7] +=in[6]; in[6] +=in[5]; | |
| 1585 in[5] +=in[4]; in[4] +=in[3]; in[3] +=in[2]; | |
| 1586 in[2] +=in[1]; in[1] +=in[0]; | |
| 1587 | |
| 1588 in[17]+=in[15]; in[15]+=in[13]; in[13]+=in[11]; in[11]+=in[9]; | |
| 1589 in[9] +=in[7]; in[7] +=in[5]; in[5] +=in[3]; in[3] +=in[1]; | |
| 1590 | |
| 1591 | |
| 1592 { | |
| 1593 | |
| 1594 #define MACRO0(v) { \ | |
| 1595 real tmp; \ | |
| 1596 out2[9+(v)] = (tmp = sum0 + sum1) * w[27+(v)]; \ | |
| 1597 out2[8-(v)] = tmp * w[26-(v)]; } \ | |
| 1598 sum0 -= sum1; \ | |
| 1599 ts[SBLIMIT*(8-(v))] = out1[8-(v)] + sum0 * w[8-(v)]; \ | |
| 1600 ts[SBLIMIT*(9+(v))] = out1[9+(v)] + sum0 * w[9+(v)]; | |
| 1601 #define MACRO1(v) { \ | |
| 1602 real sum0,sum1; \ | |
| 1603 sum0 = tmp1a + tmp2a; \ | |
| 1604 sum1 = (tmp1b + tmp2b) * tfcos36[(v)]; \ | |
| 1605 MACRO0(v); } | |
| 1606 #define MACRO2(v) { \ | |
| 1607 real sum0,sum1; \ | |
| 1608 sum0 = tmp2a - tmp1a; \ | |
| 1609 sum1 = (tmp2b - tmp1b) * tfcos36[(v)]; \ | |
| 1610 MACRO0(v); } | |
| 1611 | |
| 1612 register const real *c = COS9; | |
| 1613 register real *out2 = o2; | |
| 1614 register real *w = wintab; | |
| 1615 register real *out1 = o1; | |
| 1616 register real *ts = tsbuf; | |
| 1617 | |
| 1618 real ta33,ta66,tb33,tb66; | |
| 1619 | |
| 1620 ta33 = in[2*3+0] * c[3]; | |
| 1621 ta66 = in[2*6+0] * c[6]; | |
| 1622 tb33 = in[2*3+1] * c[3]; | |
| 1623 tb66 = in[2*6+1] * c[6]; | |
| 1624 | |
| 1625 { | |
| 1626 real tmp1a,tmp2a,tmp1b,tmp2b; | |
| 1627 tmp1a = in[2*1+0] * c[1] + ta33 + in[2*5+0] * c[5] + in[2*7+0] * c[7]; | |
| 1628 tmp1b = in[2*1+1] * c[1] + tb33 + in[2*5+1] * c[5] + in[2*7+1] * c[7]; | |
| 1629 tmp2a = in[2*0+0] + in[2*2+0] * c[2] + in[2*4+0] * c[4] + ta66 + in[2*8+0] * c[8]; | |
| 1630 tmp2b = in[2*0+1] + in[2*2+1] * c[2] + in[2*4+1] * c[4] + tb66 + in[2*8+1] * c[8]; | |
| 1631 | |
| 1632 MACRO1(0); | |
| 1633 MACRO2(8); | |
| 1634 } | |
| 1635 | |
| 1636 { | |
| 1637 real tmp1a,tmp2a,tmp1b,tmp2b; | |
| 1638 tmp1a = ( in[2*1+0] - in[2*5+0] - in[2*7+0] ) * c[3]; | |
| 1639 tmp1b = ( in[2*1+1] - in[2*5+1] - in[2*7+1] ) * c[3]; | |
| 1640 tmp2a = ( in[2*2+0] - in[2*4+0] - in[2*8+0] ) * c[6] - in[2*6+0] + in[2*0+0]; | |
| 1641 tmp2b = ( in[2*2+1] - in[2*4+1] - in[2*8+1] ) * c[6] - in[2*6+1] + in[2*0+1]; | |
| 1642 | |
| 1643 MACRO1(1); | |
| 1644 MACRO2(7); | |
| 1645 } | |
| 1646 | |
| 1647 { | |
| 1648 real tmp1a,tmp2a,tmp1b,tmp2b; | |
| 1649 tmp1a = in[2*1+0] * c[5] - ta33 - in[2*5+0] * c[7] + in[2*7+0] * c[1]; | |
| 1650 tmp1b = in[2*1+1] * c[5] - tb33 - in[2*5+1] * c[7] + in[2*7+1] * c[1]; | |
| 1651 tmp2a = in[2*0+0] - in[2*2+0] * c[8] - in[2*4+0] * c[2] + ta66 + in[2*8+0] * c[4]; | |
| 1652 tmp2b = in[2*0+1] - in[2*2+1] * c[8] - in[2*4+1] * c[2] + tb66 + in[2*8+1] * c[4]; | |
| 1653 | |
| 1654 MACRO1(2); | |
| 1655 MACRO2(6); | |
| 1656 } | |
| 1657 | |
| 1658 { | |
| 1659 real tmp1a,tmp2a,tmp1b,tmp2b; | |
| 1660 tmp1a = in[2*1+0] * c[7] - ta33 + in[2*5+0] * c[1] - in[2*7+0] * c[5]; | |
| 1661 tmp1b = in[2*1+1] * c[7] - tb33 + in[2*5+1] * c[1] - in[2*7+1] * c[5]; | |
| 1662 tmp2a = in[2*0+0] - in[2*2+0] * c[4] + in[2*4+0] * c[8] + ta66 - in[2*8+0] * c[2]; | |
| 1663 tmp2b = in[2*0+1] - in[2*2+1] * c[4] + in[2*4+1] * c[8] + tb66 - in[2*8+1] * c[2]; | |
| 1664 | |
| 1665 MACRO1(3); | |
| 1666 MACRO2(5); | |
| 1667 } | |
| 1668 | |
| 1669 { | |
| 1670 real sum0,sum1; | |
| 1671 sum0 = in[2*0+0] - in[2*2+0] + in[2*4+0] - in[2*6+0] + in[2*8+0]; | |
| 1672 sum1 = (in[2*0+1] - in[2*2+1] + in[2*4+1] - in[2*6+1] + in[2*8+1] ) * tfcos36[4]; | |
| 1673 MACRO0(4); | |
| 1674 } | |
| 1675 } | |
| 1676 | |
| 1677 } | |
| 1678 } | |
| 1679 | |
| 1680 /* | |
| 1681 * new DCT12 | |
| 1682 */ | |
| 1683 static void dct12(real *in,real *rawout1,real *rawout2,register real *wi,register real *ts) | |
| 1684 { | |
| 1685 #define DCT12_PART1 \ | |
| 1686 in5 = in[5*3]; \ | |
| 1687 in5 += (in4 = in[4*3]); \ | |
| 1688 in4 += (in3 = in[3*3]); \ | |
| 1689 in3 += (in2 = in[2*3]); \ | |
| 1690 in2 += (in1 = in[1*3]); \ | |
| 1691 in1 += (in0 = in[0*3]); \ | |
| 1692 \ | |
| 1693 in5 += in3; in3 += in1; \ | |
| 1694 \ | |
| 1695 in2 *= COS6_1; \ | |
| 1696 in3 *= COS6_1; \ | |
| 1697 | |
| 1698 #define DCT12_PART2 \ | |
| 1699 in0 += in4 * COS6_2; \ | |
| 1700 \ | |
| 1701 in4 = in0 + in2; \ | |
| 1702 in0 -= in2; \ | |
| 1703 \ | |
| 1704 in1 += in5 * COS6_2; \ | |
| 1705 \ | |
| 1706 in5 = (in1 + in3) * tfcos12[0]; \ | |
| 1707 in1 = (in1 - in3) * tfcos12[2]; \ | |
| 1708 \ | |
| 1709 in3 = in4 + in5; \ | |
| 1710 in4 -= in5; \ | |
| 1711 \ | |
| 1712 in2 = in0 + in1; \ | |
| 1713 in0 -= in1; | |
| 1714 | |
| 1715 | |
| 1716 { | |
| 1717 real in0,in1,in2,in3,in4,in5; | |
| 1718 register real *out1 = rawout1; | |
| 1719 ts[SBLIMIT*0] = out1[0]; ts[SBLIMIT*1] = out1[1]; ts[SBLIMIT*2] = out1[2]; | |
| 1720 ts[SBLIMIT*3] = out1[3]; ts[SBLIMIT*4] = out1[4]; ts[SBLIMIT*5] = out1[5]; | |
| 1721 | |
| 1722 DCT12_PART1 | |
| 1723 | |
| 1724 { | |
| 1725 real tmp0,tmp1 = (in0 - in4); | |
| 1726 { | |
| 1727 real tmp2 = (in1 - in5) * tfcos12[1]; | |
| 1728 tmp0 = tmp1 + tmp2; | |
| 1729 tmp1 -= tmp2; | |
| 1730 } | |
| 1731 ts[(17-1)*SBLIMIT] = out1[17-1] + tmp0 * wi[11-1]; | |
| 1732 ts[(12+1)*SBLIMIT] = out1[12+1] + tmp0 * wi[6+1]; | |
| 1733 ts[(6 +1)*SBLIMIT] = out1[6 +1] + tmp1 * wi[1]; | |
| 1734 ts[(11-1)*SBLIMIT] = out1[11-1] + tmp1 * wi[5-1]; | |
| 1735 } | |
| 1736 | |
| 1737 DCT12_PART2 | |
| 1738 | |
| 1739 ts[(17-0)*SBLIMIT] = out1[17-0] + in2 * wi[11-0]; | |
| 1740 ts[(12+0)*SBLIMIT] = out1[12+0] + in2 * wi[6+0]; | |
| 1741 ts[(12+2)*SBLIMIT] = out1[12+2] + in3 * wi[6+2]; | |
| 1742 ts[(17-2)*SBLIMIT] = out1[17-2] + in3 * wi[11-2]; | |
| 1743 | |
| 1744 ts[(6+0)*SBLIMIT] = out1[6+0] + in0 * wi[0]; | |
| 1745 ts[(11-0)*SBLIMIT] = out1[11-0] + in0 * wi[5-0]; | |
| 1746 ts[(6+2)*SBLIMIT] = out1[6+2] + in4 * wi[2]; | |
| 1747 ts[(11-2)*SBLIMIT] = out1[11-2] + in4 * wi[5-2]; | |
| 1748 } | |
| 1749 | |
| 1750 in++; | |
| 1751 | |
| 1752 { | |
| 1753 real in0,in1,in2,in3,in4,in5; | |
| 1754 register real *out2 = rawout2; | |
| 1755 | |
| 1756 DCT12_PART1 | |
| 1757 | |
| 1758 { | |
| 1759 real tmp0,tmp1 = (in0 - in4); | |
| 1760 { | |
| 1761 real tmp2 = (in1 - in5) * tfcos12[1]; | |
| 1762 tmp0 = tmp1 + tmp2; | |
| 1763 tmp1 -= tmp2; | |
| 1764 } | |
| 1765 out2[5-1] = tmp0 * wi[11-1]; | |
| 1766 out2[0+1] = tmp0 * wi[6+1]; | |
| 1767 ts[(12+1)*SBLIMIT] += tmp1 * wi[1]; | |
| 1768 ts[(17-1)*SBLIMIT] += tmp1 * wi[5-1]; | |
| 1769 } | |
| 1770 | |
| 1771 DCT12_PART2 | |
| 1772 | |
| 1773 out2[5-0] = in2 * wi[11-0]; | |
| 1774 out2[0+0] = in2 * wi[6+0]; | |
| 1775 out2[0+2] = in3 * wi[6+2]; | |
| 1776 out2[5-2] = in3 * wi[11-2]; | |
| 1777 | |
| 1778 ts[(12+0)*SBLIMIT] += in0 * wi[0]; | |
| 1779 ts[(17-0)*SBLIMIT] += in0 * wi[5-0]; | |
| 1780 ts[(12+2)*SBLIMIT] += in4 * wi[2]; | |
| 1781 ts[(17-2)*SBLIMIT] += in4 * wi[5-2]; | |
| 1782 } | |
| 1783 | |
| 1784 in++; | |
| 1785 | |
| 1786 { | |
| 1787 real in0,in1,in2,in3,in4,in5; | |
| 1788 register real *out2 = rawout2; | |
| 1789 out2[12]=out2[13]=out2[14]=out2[15]=out2[16]=out2[17]=0.0; | |
| 1790 | |
| 1791 DCT12_PART1 | |
| 1792 | |
| 1793 { | |
| 1794 real tmp0,tmp1 = (in0 - in4); | |
| 1795 { | |
| 1796 real tmp2 = (in1 - in5) * tfcos12[1]; | |
| 1797 tmp0 = tmp1 + tmp2; | |
| 1798 tmp1 -= tmp2; | |
| 1799 } | |
| 1800 out2[11-1] = tmp0 * wi[11-1]; | |
| 1801 out2[6 +1] = tmp0 * wi[6+1]; | |
| 1802 out2[0+1] += tmp1 * wi[1]; | |
| 1803 out2[5-1] += tmp1 * wi[5-1]; | |
| 1804 } | |
| 1805 | |
| 1806 DCT12_PART2 | |
| 1807 | |
| 1808 out2[11-0] = in2 * wi[11-0]; | |
| 1809 out2[6 +0] = in2 * wi[6+0]; | |
| 1810 out2[6 +2] = in3 * wi[6+2]; | |
| 1811 out2[11-2] = in3 * wi[11-2]; | |
| 1812 | |
| 1813 out2[0+0] += in0 * wi[0]; | |
| 1814 out2[5-0] += in0 * wi[5-0]; | |
| 1815 out2[0+2] += in4 * wi[2]; | |
| 1816 out2[5-2] += in4 * wi[5-2]; | |
| 1817 } | |
| 1818 } | |
| 1819 | |
| 1820 /* | |
| 1821 * III_hybrid | |
| 1822 */ | |
| 1823 static void III_hybrid(real fsIn[SBLIMIT][SSLIMIT],real tsOut[SSLIMIT][SBLIMIT], | |
|
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1824 int ch,struct gr_info_s *gr_info,struct mpstr *mp) |
| 261 | 1825 { |
| 1826 real *tspnt = (real *) tsOut; | |
|
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1827 real (*block)[2][SBLIMIT*SSLIMIT] = mp->hybrid_block; |
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1828 int *blc = mp->hybrid_blc; |
| 261 | 1829 real *rawout1,*rawout2; |
| 1830 int bt; | |
| 1831 int sb = 0; | |
| 1832 | |
| 1833 { | |
| 1834 int b = blc[ch]; | |
| 1835 rawout1=block[b][ch]; | |
| 1836 b=-b+1; | |
| 1837 rawout2=block[b][ch]; | |
| 1838 blc[ch] = b; | |
| 1839 } | |
| 1840 | |
| 1841 | |
| 1842 if(gr_info->mixed_block_flag) { | |
| 1843 sb = 2; | |
| 1844 dct36(fsIn[0],rawout1,rawout2,win[0],tspnt); | |
| 1845 dct36(fsIn[1],rawout1+18,rawout2+18,win1[0],tspnt+1); | |
| 1846 rawout1 += 36; rawout2 += 36; tspnt += 2; | |
| 1847 } | |
| 1848 | |
| 1849 bt = gr_info->block_type; | |
| 1850 if(bt == 2) { | |
| 1851 for (; sb<gr_info->maxb; sb+=2,tspnt+=2,rawout1+=36,rawout2+=36) { | |
| 1852 dct12(fsIn[sb],rawout1,rawout2,win[2],tspnt); | |
| 1853 dct12(fsIn[sb+1],rawout1+18,rawout2+18,win1[2],tspnt+1); | |
| 1854 } | |
| 1855 } | |
| 1856 else { | |
| 1857 for (; sb<gr_info->maxb; sb+=2,tspnt+=2,rawout1+=36,rawout2+=36) { | |
| 1858 dct36(fsIn[sb],rawout1,rawout2,win[bt],tspnt); | |
| 1859 dct36(fsIn[sb+1],rawout1+18,rawout2+18,win1[bt],tspnt+1); | |
| 1860 } | |
| 1861 } | |
| 1862 | |
| 1863 for(;sb<SBLIMIT;sb++,tspnt++) { | |
| 1864 int i; | |
| 1865 for(i=0;i<SSLIMIT;i++) { | |
| 1866 tspnt[i*SBLIMIT] = *rawout1++; | |
| 1867 *rawout2++ = 0.0; | |
| 1868 } | |
| 1869 } | |
| 1870 } | |
| 1871 | |
| 1872 /* | |
| 1873 * main layer3 handler | |
| 1874 */ | |
|
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1875 int do_layer3(struct frame *fr,unsigned char *pcm_sample, |
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1876 int *pcm_point,struct mpstr *mp) |
| 261 | 1877 { |
| 1878 int gr, ch, ss,clip=0; | |
| 1879 int scalefacs[2][39]; /* max 39 for short[13][3] mode, mixed: 38, long: 22 */ | |
| 1880 struct III_sideinfo sideinfo; | |
| 1881 int stereo = fr->stereo; | |
| 1882 int single = fr->single; | |
| 1883 int ms_stereo,i_stereo; | |
| 1884 int sfreq = fr->sampling_frequency; | |
| 1885 int stereo1,granules; | |
| 1886 | |
| 1887 if(stereo == 1) { /* stream is mono */ | |
| 1888 stereo1 = 1; | |
| 1889 single = 0; | |
| 1890 } | |
| 1891 else if(single >= 0) /* stream is stereo, but force to mono */ | |
| 1892 stereo1 = 1; | |
| 1893 else | |
| 1894 stereo1 = 2; | |
| 1895 | |
| 1896 if(fr->mode == MPG_MD_JOINT_STEREO) { | |
| 1897 ms_stereo = fr->mode_ext & 0x2; | |
| 1898 i_stereo = fr->mode_ext & 0x1; | |
| 1899 } | |
| 1900 else | |
| 1901 ms_stereo = i_stereo = 0; | |
| 1902 | |
| 1903 if(fr->lsf) { | |
| 1904 granules = 1; | |
| 1905 if(!III_get_side_info_2(&sideinfo,stereo,ms_stereo,sfreq,single)) | |
| 1906 return -1; | |
| 1907 } | |
| 1908 else { | |
| 1909 granules = 2; | |
| 1910 #ifdef MPEG1 | |
| 1911 if(!III_get_side_info_1(&sideinfo,stereo,ms_stereo,sfreq,single)) | |
| 1912 return -1; | |
| 1913 #else | |
|
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1914 __Sound_SetError("MPGLIB: Not supported!"); |
| 261 | 1915 #endif |
| 1916 } | |
| 1917 | |
|
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1918 if(set_pointer(sideinfo.main_data_begin,mp) == MP3_ERR) |
| 261 | 1919 return -1; |
| 1920 | |
| 1921 for (gr=0;gr<granules;gr++) | |
| 1922 { | |
| 1923 real hybridIn[2][SBLIMIT][SSLIMIT]; | |
| 1924 real hybridOut[2][SSLIMIT][SBLIMIT]; | |
| 1925 | |
| 1926 { | |
| 1927 struct gr_info_s *gr_info = &(sideinfo.ch[0].gr[gr]); | |
| 1928 long part2bits; | |
| 1929 if(fr->lsf) | |
| 1930 part2bits = III_get_scale_factors_2(scalefacs[0],gr_info,0); | |
| 1931 else { | |
| 1932 #ifdef MPEG1 | |
| 1933 part2bits = III_get_scale_factors_1(scalefacs[0],gr_info); | |
| 1934 #else | |
|
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1935 __Sound_SetError("MPGLIB: Not supported!"); |
| 261 | 1936 #endif |
| 1937 } | |
| 1938 if(III_dequantize_sample(hybridIn[0], scalefacs[0],gr_info,sfreq,part2bits)) | |
| 1939 return clip; | |
| 1940 } | |
| 1941 if(stereo == 2) { | |
| 1942 struct gr_info_s *gr_info = &(sideinfo.ch[1].gr[gr]); | |
| 1943 long part2bits; | |
| 1944 if(fr->lsf) | |
| 1945 part2bits = III_get_scale_factors_2(scalefacs[1],gr_info,i_stereo); | |
| 1946 else { | |
| 1947 #ifdef MPEG1 | |
| 1948 part2bits = III_get_scale_factors_1(scalefacs[1],gr_info); | |
| 1949 #else | |
|
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1950 __Sound_SetError("MPGLIB: Not supported!"); |
| 261 | 1951 #endif |
| 1952 } | |
| 1953 | |
| 1954 if(III_dequantize_sample(hybridIn[1],scalefacs[1],gr_info,sfreq,part2bits)) | |
| 1955 return clip; | |
| 1956 | |
| 1957 if(ms_stereo) { | |
| 1958 int i; | |
| 1959 for(i=0;i<SBLIMIT*SSLIMIT;i++) { | |
| 1960 real tmp0,tmp1; | |
| 1961 tmp0 = ((real *) hybridIn[0])[i]; | |
| 1962 tmp1 = ((real *) hybridIn[1])[i]; | |
| 1963 ((real *) hybridIn[0])[i] = tmp0 + tmp1; | |
| 1964 ((real *) hybridIn[1])[i] = tmp0 - tmp1; | |
| 1965 } | |
| 1966 } | |
| 1967 | |
| 1968 if(i_stereo) | |
| 1969 III_i_stereo(hybridIn,scalefacs[1],gr_info,sfreq,ms_stereo,fr->lsf); | |
| 1970 | |
| 1971 if(ms_stereo || i_stereo || (single == 3) ) { | |
| 1972 if(gr_info->maxb > sideinfo.ch[0].gr[gr].maxb) | |
| 1973 sideinfo.ch[0].gr[gr].maxb = gr_info->maxb; | |
| 1974 else | |
| 1975 gr_info->maxb = sideinfo.ch[0].gr[gr].maxb; | |
| 1976 } | |
| 1977 | |
| 1978 switch(single) { | |
| 1979 case 3: | |
| 1980 { | |
| 1981 register int i; | |
| 1982 register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1]; | |
| 1983 for(i=0;i<SSLIMIT*gr_info->maxb;i++,in0++) | |
| 1984 *in0 = (*in0 + *in1++); /* *0.5 done by pow-scale */ | |
| 1985 } | |
| 1986 break; | |
| 1987 case 1: | |
| 1988 { | |
| 1989 register int i; | |
| 1990 register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1]; | |
| 1991 for(i=0;i<SSLIMIT*gr_info->maxb;i++) | |
| 1992 *in0++ = *in1++; | |
| 1993 } | |
| 1994 break; | |
| 1995 } | |
| 1996 } | |
| 1997 | |
| 1998 for(ch=0;ch<stereo1;ch++) { | |
| 1999 struct gr_info_s *gr_info = &(sideinfo.ch[ch].gr[gr]); | |
| 2000 III_antialias(hybridIn[ch],gr_info); | |
|
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2001 III_hybrid(hybridIn[ch], hybridOut[ch], ch,gr_info,mp); |
| 261 | 2002 } |
| 2003 | |
| 2004 for(ss=0;ss<SSLIMIT;ss++) { | |
| 2005 if(single >= 0) { | |
|
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2006 clip += synth_1to1_mono(hybridOut[0][ss],pcm_sample,pcm_point,mp); |
| 261 | 2007 } |
| 2008 else { | |
| 2009 int p1 = *pcm_point; | |
|
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2010 clip += synth_1to1(hybridOut[0][ss],0,pcm_sample,&p1,mp); |
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2011 clip += synth_1to1(hybridOut[1][ss],1,pcm_sample,pcm_point,mp); |
| 261 | 2012 } |
| 2013 } | |
| 2014 } | |
| 2015 | |
| 2016 return clip; | |
| 2017 } | |
| 2018 | |
| 2019 |