Mercurial > SDL_sound_CoreAudio
annotate decoders/mpglib/layer3.c @ 438:72ccb2916418
Initial add.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Sun, 12 Jan 2003 21:11:15 +0000 |
| parents | 9d0b5ec9cc26 |
| children | 5b00e43ec23c |
| 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 | |
| 8 #include <stdlib.h> | |
|
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9 |
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10 #include "SDL_sound.h" |
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11 |
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12 #define __SDL_SOUND_INTERNAL__ |
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13 #include "SDL_sound_internal.h" |
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14 |
| 261 | 15 #include "mpg123_sdlsound.h" |
| 16 #include "mpglib_sdlsound.h" | |
| 17 #include "huffman.h" | |
| 18 | |
| 19 #define MPEG1 | |
| 20 | |
| 21 static real ispow[8207]; | |
| 22 static real aa_ca[8],aa_cs[8]; | |
| 23 static real COS1[12][6]; | |
| 24 static real win[4][36]; | |
| 25 static real win1[4][36]; | |
| 26 static real gainpow2[256+118+4]; | |
| 27 static real COS9[9]; | |
| 28 static real COS6_1,COS6_2; | |
| 29 static real tfcos36[9]; | |
| 30 static real tfcos12[3]; | |
| 31 | |
| 32 struct bandInfoStruct { | |
| 33 short longIdx[23]; | |
| 34 short longDiff[22]; | |
| 35 short shortIdx[14]; | |
| 36 short shortDiff[13]; | |
| 37 }; | |
| 38 | |
| 39 int longLimit[9][23]; | |
| 40 int shortLimit[9][14]; | |
| 41 | |
| 42 struct bandInfoStruct bandInfo[9] = { | |
| 43 | |
| 44 /* MPEG 1.0 */ | |
| 45 { {0,4,8,12,16,20,24,30,36,44,52,62,74, 90,110,134,162,196,238,288,342,418,576}, | |
| 46 {4,4,4,4,4,4,6,6,8, 8,10,12,16,20,24,28,34,42,50,54, 76,158}, | |
| 47 {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}, | |
| 48 {4,4,4,4,6,8,10,12,14,18,22,30,56} } , | |
| 49 | |
| 50 { {0,4,8,12,16,20,24,30,36,42,50,60,72, 88,106,128,156,190,230,276,330,384,576}, | |
| 51 {4,4,4,4,4,4,6,6,6, 8,10,12,16,18,22,28,34,40,46,54, 54,192}, | |
| 52 {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}, | |
| 53 {4,4,4,4,6,6,10,12,14,16,20,26,66} } , | |
| 54 | |
| 55 { {0,4,8,12,16,20,24,30,36,44,54,66,82,102,126,156,194,240,296,364,448,550,576} , | |
| 56 {4,4,4,4,4,4,6,6,8,10,12,16,20,24,30,38,46,56,68,84,102, 26} , | |
| 57 {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} , | |
| 58 {4,4,4,4,6,8,12,16,20,26,34,42,12} } , | |
| 59 | |
| 60 /* MPEG 2.0 */ | |
| 61 { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576}, | |
| 62 {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 } , | |
| 63 {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} , | |
| 64 {4,4,4,6,6,8,10,14,18,26,32,42,18 } } , | |
| 65 | |
| 66 { {0,6,12,18,24,30,36,44,54,66,80,96,114,136,162,194,232,278,330,394,464,540,576}, | |
| 67 {6,6,6,6,6,6,8,10,12,14,16,18,22,26,32,38,46,52,64,70,76,36 } , | |
| 68 {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} , | |
| 69 {4,4,4,6,8,10,12,14,18,24,32,44,12 } } , | |
| 70 | |
| 71 { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576}, | |
| 72 {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 }, | |
| 73 {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}, | |
| 74 {4,4,4,6,8,10,12,14,18,24,30,40,18 } } , | |
| 75 /* MPEG 2.5 */ | |
| 76 { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576} , | |
| 77 {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54}, | |
| 78 {0,12,24,36,54,78,108,144,186,240,312,402,522,576}, | |
| 79 {4,4,4,6,8,10,12,14,18,24,30,40,18} }, | |
| 80 { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576} , | |
| 81 {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54}, | |
| 82 {0,12,24,36,54,78,108,144,186,240,312,402,522,576}, | |
| 83 {4,4,4,6,8,10,12,14,18,24,30,40,18} }, | |
| 84 { {0,12,24,36,48,60,72,88,108,132,160,192,232,280,336,400,476,566,568,570,572,574,576}, | |
| 85 {12,12,12,12,12,12,16,20,24,28,32,40,48,56,64,76,90,2,2,2,2,2}, | |
| 86 {0, 24, 48, 72,108,156,216,288,372,480,486,492,498,576}, | |
| 87 {8,8,8,12,16,20,24,28,36,2,2,2,26} } , | |
| 88 }; | |
| 89 | |
| 90 static int mapbuf0[9][152]; | |
| 91 static int mapbuf1[9][156]; | |
| 92 static int mapbuf2[9][44]; | |
| 93 static int *map[9][3]; | |
| 94 static int *mapend[9][3]; | |
| 95 | |
| 96 static unsigned int n_slen2[512]; /* MPEG 2.0 slen for 'normal' mode */ | |
| 97 static unsigned int i_slen2[256]; /* MPEG 2.0 slen for intensity stereo */ | |
| 98 | |
| 99 static real tan1_1[16],tan2_1[16],tan1_2[16],tan2_2[16]; | |
| 100 static real pow1_1[2][16],pow2_1[2][16],pow1_2[2][16],pow2_2[2][16]; | |
| 101 | |
| 102 /* | |
| 103 * init tables for layer-3 | |
| 104 */ | |
| 105 void init_layer3(int down_sample_sblimit) | |
| 106 { | |
| 107 int i,j,k,l; | |
| 108 | |
| 109 for(i=-256;i<118+4;i++) | |
| 110 gainpow2[i+256] = pow((double)2.0,-0.25 * (double) (i+210) ); | |
| 111 | |
| 112 for(i=0;i<8207;i++) | |
| 113 ispow[i] = pow((double)i,(double)4.0/3.0); | |
| 114 | |
| 115 for (i=0;i<8;i++) | |
| 116 { | |
| 117 static double Ci[8]={-0.6,-0.535,-0.33,-0.185,-0.095,-0.041,-0.0142,-0.0037}; | |
| 118 double sq=sqrt(1.0+Ci[i]*Ci[i]); | |
| 119 aa_cs[i] = 1.0/sq; | |
| 120 aa_ca[i] = Ci[i]/sq; | |
| 121 } | |
| 122 | |
| 123 for(i=0;i<18;i++) | |
| 124 { | |
| 125 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 ); | |
| 126 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 ); | |
| 127 } | |
| 128 for(i=0;i<6;i++) | |
| 129 { | |
| 130 win[1][i+18] = 0.5 / cos ( M_PI * (double) (2*(i+18)+19) / 72.0 ); | |
| 131 win[3][i+12] = 0.5 / cos ( M_PI * (double) (2*(i+12)+19) / 72.0 ); | |
| 132 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 ); | |
| 133 win[1][i+30] = win[3][i] = 0.0; | |
| 134 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 ); | |
| 135 } | |
| 136 | |
| 137 for(i=0;i<9;i++) | |
| 138 COS9[i] = cos( M_PI / 18.0 * (double) i); | |
| 139 | |
| 140 for(i=0;i<9;i++) | |
| 141 tfcos36[i] = 0.5 / cos ( M_PI * (double) (i*2+1) / 36.0 ); | |
| 142 for(i=0;i<3;i++) | |
| 143 tfcos12[i] = 0.5 / cos ( M_PI * (double) (i*2+1) / 12.0 ); | |
| 144 | |
| 145 COS6_1 = cos( M_PI / 6.0 * (double) 1); | |
| 146 COS6_2 = cos( M_PI / 6.0 * (double) 2); | |
| 147 | |
| 148 for(i=0;i<12;i++) | |
| 149 { | |
| 150 win[2][i] = 0.5 * sin( M_PI / 24.0 * (double) (2*i+1) ) / cos ( M_PI * (double) (2*i+7) / 24.0 ); | |
| 151 for(j=0;j<6;j++) | |
| 152 COS1[i][j] = cos( M_PI / 24.0 * (double) ((2*i+7)*(2*j+1)) ); | |
| 153 } | |
| 154 | |
| 155 for(j=0;j<4;j++) { | |
| 156 static int len[4] = { 36,36,12,36 }; | |
| 157 for(i=0;i<len[j];i+=2) | |
| 158 win1[j][i] = + win[j][i]; | |
| 159 for(i=1;i<len[j];i+=2) | |
| 160 win1[j][i] = - win[j][i]; | |
| 161 } | |
| 162 | |
| 163 for(i=0;i<16;i++) | |
| 164 { | |
| 165 double t = tan( (double) i * M_PI / 12.0 ); | |
| 166 tan1_1[i] = t / (1.0+t); | |
| 167 tan2_1[i] = 1.0 / (1.0 + t); | |
| 168 tan1_2[i] = M_SQRT2 * t / (1.0+t); | |
| 169 tan2_2[i] = M_SQRT2 / (1.0 + t); | |
| 170 | |
| 171 for(j=0;j<2;j++) { | |
| 172 double base = pow(2.0,-0.25*(j+1.0)); | |
| 173 double p1=1.0,p2=1.0; | |
| 174 if(i > 0) { | |
| 175 if( i & 1 ) | |
| 176 p1 = pow(base,(i+1.0)*0.5); | |
| 177 else | |
| 178 p2 = pow(base,i*0.5); | |
| 179 } | |
| 180 pow1_1[j][i] = p1; | |
| 181 pow2_1[j][i] = p2; | |
| 182 pow1_2[j][i] = M_SQRT2 * p1; | |
| 183 pow2_2[j][i] = M_SQRT2 * p2; | |
| 184 } | |
| 185 } | |
| 186 | |
| 187 for(j=0;j<9;j++) | |
| 188 { | |
| 189 struct bandInfoStruct *bi = &bandInfo[j]; | |
| 190 int *mp; | |
| 191 int cb,lwin; | |
| 192 short *bdf; | |
| 193 | |
| 194 mp = map[j][0] = mapbuf0[j]; | |
| 195 bdf = bi->longDiff; | |
| 196 for(i=0,cb = 0; cb < 8 ; cb++,i+=*bdf++) { | |
| 197 *mp++ = (*bdf) >> 1; | |
| 198 *mp++ = i; | |
| 199 *mp++ = 3; | |
| 200 *mp++ = cb; | |
| 201 } | |
| 202 bdf = bi->shortDiff+3; | |
| 203 for(cb=3;cb<13;cb++) { | |
| 204 int l = (*bdf++) >> 1; | |
| 205 for(lwin=0;lwin<3;lwin++) { | |
| 206 *mp++ = l; | |
| 207 *mp++ = i + lwin; | |
| 208 *mp++ = lwin; | |
| 209 *mp++ = cb; | |
| 210 } | |
| 211 i += 6*l; | |
| 212 } | |
| 213 mapend[j][0] = mp; | |
| 214 | |
| 215 mp = map[j][1] = mapbuf1[j]; | |
| 216 bdf = bi->shortDiff+0; | |
| 217 for(i=0,cb=0;cb<13;cb++) { | |
| 218 int l = (*bdf++) >> 1; | |
| 219 for(lwin=0;lwin<3;lwin++) { | |
| 220 *mp++ = l; | |
| 221 *mp++ = i + lwin; | |
| 222 *mp++ = lwin; | |
| 223 *mp++ = cb; | |
| 224 } | |
| 225 i += 6*l; | |
| 226 } | |
| 227 mapend[j][1] = mp; | |
| 228 | |
| 229 mp = map[j][2] = mapbuf2[j]; | |
| 230 bdf = bi->longDiff; | |
| 231 for(cb = 0; cb < 22 ; cb++) { | |
| 232 *mp++ = (*bdf++) >> 1; | |
| 233 *mp++ = cb; | |
| 234 } | |
| 235 mapend[j][2] = mp; | |
| 236 | |
| 237 } | |
| 238 | |
| 239 for(j=0;j<9;j++) { | |
| 240 for(i=0;i<23;i++) { | |
| 241 longLimit[j][i] = (bandInfo[j].longIdx[i] - 1 + 8) / 18 + 1; | |
| 242 if(longLimit[j][i] > (down_sample_sblimit) ) | |
| 243 longLimit[j][i] = down_sample_sblimit; | |
| 244 } | |
| 245 for(i=0;i<14;i++) { | |
| 246 shortLimit[j][i] = (bandInfo[j].shortIdx[i] - 1) / 18 + 1; | |
| 247 if(shortLimit[j][i] > (down_sample_sblimit) ) | |
| 248 shortLimit[j][i] = down_sample_sblimit; | |
| 249 } | |
| 250 } | |
| 251 | |
| 252 for(i=0;i<5;i++) { | |
| 253 for(j=0;j<6;j++) { | |
| 254 for(k=0;k<6;k++) { | |
| 255 int n = k + j * 6 + i * 36; | |
| 256 i_slen2[n] = i|(j<<3)|(k<<6)|(3<<12); | |
| 257 } | |
| 258 } | |
| 259 } | |
| 260 for(i=0;i<4;i++) { | |
| 261 for(j=0;j<4;j++) { | |
| 262 for(k=0;k<4;k++) { | |
| 263 int n = k + j * 4 + i * 16; | |
| 264 i_slen2[n+180] = i|(j<<3)|(k<<6)|(4<<12); | |
| 265 } | |
| 266 } | |
| 267 } | |
| 268 for(i=0;i<4;i++) { | |
| 269 for(j=0;j<3;j++) { | |
| 270 int n = j + i * 3; | |
| 271 i_slen2[n+244] = i|(j<<3) | (5<<12); | |
| 272 n_slen2[n+500] = i|(j<<3) | (2<<12) | (1<<15); | |
| 273 } | |
| 274 } | |
| 275 | |
| 276 for(i=0;i<5;i++) { | |
| 277 for(j=0;j<5;j++) { | |
| 278 for(k=0;k<4;k++) { | |
| 279 for(l=0;l<4;l++) { | |
| 280 int n = l + k * 4 + j * 16 + i * 80; | |
| 281 n_slen2[n] = i|(j<<3)|(k<<6)|(l<<9)|(0<<12); | |
| 282 } | |
| 283 } | |
| 284 } | |
| 285 } | |
| 286 for(i=0;i<5;i++) { | |
| 287 for(j=0;j<5;j++) { | |
| 288 for(k=0;k<4;k++) { | |
| 289 int n = k + j * 4 + i * 20; | |
| 290 n_slen2[n+400] = i|(j<<3)|(k<<6)|(1<<12); | |
| 291 } | |
| 292 } | |
| 293 } | |
| 294 } | |
| 295 | |
| 296 /* | |
| 297 * read additional side information | |
| 298 */ | |
| 299 #ifdef MPEG1 | |
| 300 static int III_get_side_info_1(struct III_sideinfo *si,int stereo, | |
| 301 int ms_stereo,long sfreq,int single) | |
| 302 { | |
| 303 int ch, gr; | |
| 304 int powdiff = (single == 3) ? 4 : 0; | |
| 305 | |
| 306 si->main_data_begin = getbits(9); | |
| 307 if (stereo == 1) | |
| 308 si->private_bits = getbits_fast(5); | |
| 309 else | |
| 310 si->private_bits = getbits_fast(3); | |
| 311 | |
| 312 for (ch=0; ch<stereo; ch++) { | |
| 313 si->ch[ch].gr[0].scfsi = -1; | |
| 314 si->ch[ch].gr[1].scfsi = getbits_fast(4); | |
| 315 } | |
| 316 | |
| 317 for (gr=0; gr<2; gr++) | |
| 318 { | |
| 319 for (ch=0; ch<stereo; ch++) | |
| 320 { | |
| 321 register struct gr_info_s *gr_info = &(si->ch[ch].gr[gr]); | |
| 322 | |
| 323 gr_info->part2_3_length = getbits(12); | |
| 324 gr_info->big_values = getbits_fast(9); | |
| 325 if(gr_info->big_values > 288) { | |
|
299
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326 SNDDBG(("MPGLIB: big_values too large!\n")); |
| 261 | 327 gr_info->big_values = 288; |
| 328 } | |
| 329 gr_info->pow2gain = gainpow2+256 - getbits_fast(8) + powdiff; | |
| 330 if(ms_stereo) | |
| 331 gr_info->pow2gain += 2; | |
| 332 gr_info->scalefac_compress = getbits_fast(4); | |
| 333 /* window-switching flag == 1 for block_Type != 0 .. and block-type == 0 -> win-sw-flag = 0 */ | |
| 334 if(get1bit()) | |
| 335 { | |
| 336 int i; | |
| 337 gr_info->block_type = getbits_fast(2); | |
| 338 gr_info->mixed_block_flag = get1bit(); | |
| 339 gr_info->table_select[0] = getbits_fast(5); | |
| 340 gr_info->table_select[1] = getbits_fast(5); | |
| 341 /* | |
| 342 * table_select[2] not needed, because there is no region2, | |
| 343 * but to satisfy some verifications tools we set it either. | |
| 344 */ | |
| 345 gr_info->table_select[2] = 0; | |
| 346 for(i=0;i<3;i++) | |
| 347 gr_info->full_gain[i] = gr_info->pow2gain + (getbits_fast(3)<<3); | |
| 348 | |
| 349 if(gr_info->block_type == 0) { | |
|
387
fb519e6028e3
Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL*_MACRO)
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diff
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350 BAIL_MACRO("MPGLIB: Blocktype == 0 and window-switching == 1 not allowed.", 0); |
| 261 | 351 } |
| 352 /* region_count/start parameters are implicit in this case. */ | |
| 353 gr_info->region1start = 36>>1; | |
| 354 gr_info->region2start = 576>>1; | |
| 355 } | |
| 356 else | |
| 357 { | |
| 358 int i,r0c,r1c; | |
| 359 for (i=0; i<3; i++) | |
| 360 gr_info->table_select[i] = getbits_fast(5); | |
| 361 r0c = getbits_fast(4); | |
| 362 r1c = getbits_fast(3); | |
| 363 gr_info->region1start = bandInfo[sfreq].longIdx[r0c+1] >> 1 ; | |
| 364 gr_info->region2start = bandInfo[sfreq].longIdx[r0c+1+r1c+1] >> 1; | |
| 365 gr_info->block_type = 0; | |
| 366 gr_info->mixed_block_flag = 0; | |
| 367 } | |
| 368 gr_info->preflag = get1bit(); | |
| 369 gr_info->scalefac_scale = get1bit(); | |
| 370 gr_info->count1table_select = get1bit(); | |
| 371 } | |
| 372 } | |
| 373 return !0; | |
| 374 } | |
| 375 #endif | |
| 376 | |
| 377 /* | |
| 378 * Side Info for MPEG 2.0 / LSF | |
| 379 */ | |
| 380 static int III_get_side_info_2(struct III_sideinfo *si,int stereo, | |
| 381 int ms_stereo,long sfreq,int single) | |
| 382 { | |
| 383 int ch; | |
| 384 int powdiff = (single == 3) ? 4 : 0; | |
| 385 | |
| 386 si->main_data_begin = getbits(8); | |
| 387 if (stereo == 1) | |
| 388 si->private_bits = get1bit(); | |
| 389 else | |
| 390 si->private_bits = getbits_fast(2); | |
| 391 | |
| 392 for (ch=0; ch<stereo; ch++) | |
| 393 { | |
| 394 register struct gr_info_s *gr_info = &(si->ch[ch].gr[0]); | |
| 395 | |
| 396 gr_info->part2_3_length = getbits(12); | |
| 397 gr_info->big_values = getbits_fast(9); | |
| 398 if(gr_info->big_values > 288) { | |
|
299
7b1df7526915
Patches for Visual C compatibility.
Ryan C. Gordon <icculus@icculus.org>
parents:
281
diff
changeset
|
399 SNDDBG(("MPGLIB: big_values too large!\n")); |
| 261 | 400 gr_info->big_values = 288; |
| 401 } | |
| 402 gr_info->pow2gain = gainpow2+256 - getbits_fast(8) + powdiff; | |
| 403 if(ms_stereo) | |
| 404 gr_info->pow2gain += 2; | |
| 405 gr_info->scalefac_compress = getbits(9); | |
| 406 /* window-switching flag == 1 for block_Type != 0 .. and block-type == 0 -> win-sw-flag = 0 */ | |
| 407 if(get1bit()) | |
| 408 { | |
| 409 int i; | |
| 410 gr_info->block_type = getbits_fast(2); | |
| 411 gr_info->mixed_block_flag = get1bit(); | |
| 412 gr_info->table_select[0] = getbits_fast(5); | |
| 413 gr_info->table_select[1] = getbits_fast(5); | |
| 414 /* | |
| 415 * table_select[2] not needed, because there is no region2, | |
| 416 * but to satisfy some verifications tools we set it either. | |
| 417 */ | |
| 418 gr_info->table_select[2] = 0; | |
| 419 for(i=0;i<3;i++) | |
| 420 gr_info->full_gain[i] = gr_info->pow2gain + (getbits_fast(3)<<3); | |
| 421 | |
| 422 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
|
423 BAIL_MACRO("MPGLIB: Blocktype == 0 and window-switching == 1 not allowed.", 0); |
| 261 | 424 } |
| 425 /* region_count/start parameters are implicit in this case. */ | |
| 426 /* check this again! */ | |
| 427 if(gr_info->block_type == 2) | |
| 428 gr_info->region1start = 36>>1; | |
| 429 else if(sfreq == 8) | |
| 430 /* check this for 2.5 and sfreq=8 */ | |
| 431 gr_info->region1start = 108>>1; | |
| 432 else | |
| 433 gr_info->region1start = 54>>1; | |
| 434 gr_info->region2start = 576>>1; | |
| 435 } | |
| 436 else | |
| 437 { | |
| 438 int i,r0c,r1c; | |
| 439 for (i=0; i<3; i++) | |
| 440 gr_info->table_select[i] = getbits_fast(5); | |
| 441 r0c = getbits_fast(4); | |
| 442 r1c = getbits_fast(3); | |
| 443 gr_info->region1start = bandInfo[sfreq].longIdx[r0c+1] >> 1 ; | |
| 444 gr_info->region2start = bandInfo[sfreq].longIdx[r0c+1+r1c+1] >> 1; | |
| 445 gr_info->block_type = 0; | |
| 446 gr_info->mixed_block_flag = 0; | |
| 447 } | |
| 448 gr_info->scalefac_scale = get1bit(); | |
| 449 gr_info->count1table_select = get1bit(); | |
| 450 } | |
| 451 return !0; | |
| 452 } | |
| 453 | |
| 454 /* | |
| 455 * read scalefactors | |
| 456 */ | |
| 457 #ifdef MPEG1 | |
| 458 static int III_get_scale_factors_1(int *scf,struct gr_info_s *gr_info) | |
| 459 { | |
| 460 static const unsigned char slen[2][16] = { | |
| 461 {0, 0, 0, 0, 3, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4}, | |
| 462 {0, 1, 2, 3, 0, 1, 2, 3, 1, 2, 3, 1, 2, 3, 2, 3} | |
| 463 }; | |
| 464 int numbits; | |
| 465 int num0 = slen[0][gr_info->scalefac_compress]; | |
| 466 int num1 = slen[1][gr_info->scalefac_compress]; | |
| 467 | |
| 468 if (gr_info->block_type == 2) { | |
| 469 int i=18; | |
| 470 numbits = (num0 + num1) * 18; | |
| 471 | |
| 472 if (gr_info->mixed_block_flag) { | |
| 473 for (i=8;i;i--) | |
| 474 *scf++ = getbits_fast(num0); | |
| 475 i = 9; | |
| 476 numbits -= num0; /* num0 * 17 + num1 * 18 */ | |
| 477 } | |
| 478 | |
| 479 for (;i;i--) | |
| 480 *scf++ = getbits_fast(num0); | |
| 481 for (i = 18; i; i--) | |
| 482 *scf++ = getbits_fast(num1); | |
| 483 *scf++ = 0; *scf++ = 0; *scf++ = 0; /* short[13][0..2] = 0 */ | |
| 484 } | |
| 485 else { | |
| 486 int i; | |
| 487 int scfsi = gr_info->scfsi; | |
| 488 | |
| 489 if(scfsi < 0) { /* scfsi < 0 => granule == 0 */ | |
| 490 for(i=11;i;i--) | |
| 491 *scf++ = getbits_fast(num0); | |
| 492 for(i=10;i;i--) | |
| 493 *scf++ = getbits_fast(num1); | |
| 494 numbits = (num0 + num1) * 10 + num0; | |
| 495 *scf++ = 0; | |
| 496 } | |
| 497 else { | |
| 498 numbits = 0; | |
| 499 if(!(scfsi & 0x8)) { | |
| 500 for (i=0;i<6;i++) | |
| 501 *scf++ = getbits_fast(num0); | |
| 502 numbits += num0 * 6; | |
| 503 } | |
| 504 else { | |
| 505 scf += 6; | |
| 506 } | |
| 507 | |
| 508 if(!(scfsi & 0x4)) { | |
| 509 for (i=0;i<5;i++) | |
| 510 *scf++ = getbits_fast(num0); | |
| 511 numbits += num0 * 5; | |
| 512 } | |
| 513 else { | |
| 514 scf += 5; | |
| 515 } | |
| 516 | |
| 517 if(!(scfsi & 0x2)) { | |
| 518 for(i=0;i<5;i++) | |
| 519 *scf++ = getbits_fast(num1); | |
| 520 numbits += num1 * 5; | |
| 521 } | |
| 522 else { | |
| 523 scf += 5; | |
| 524 } | |
| 525 | |
| 526 if(!(scfsi & 0x1)) { | |
| 527 for (i=0;i<5;i++) | |
| 528 *scf++ = getbits_fast(num1); | |
| 529 numbits += num1 * 5; | |
| 530 } | |
| 531 else { | |
| 532 scf += 5; | |
| 533 } | |
| 534 *scf++ = 0; /* no l[21] in original sources */ | |
| 535 } | |
| 536 } | |
| 537 return numbits; | |
| 538 } | |
| 539 #endif | |
| 540 | |
| 541 | |
| 542 static int III_get_scale_factors_2(int *scf,struct gr_info_s *gr_info,int i_stereo) | |
| 543 { | |
| 544 unsigned char *pnt; | |
| 545 int i,j; | |
| 546 unsigned int slen; | |
| 547 int n = 0; | |
| 548 int numbits = 0; | |
| 549 | |
| 550 static unsigned char stab[3][6][4] = { | |
| 551 { { 6, 5, 5,5 } , { 6, 5, 7,3 } , { 11,10,0,0} , | |
| 552 { 7, 7, 7,0 } , { 6, 6, 6,3 } , { 8, 8,5,0} } , | |
| 553 { { 9, 9, 9,9 } , { 9, 9,12,6 } , { 18,18,0,0} , | |
| 554 {12,12,12,0 } , {12, 9, 9,6 } , { 15,12,9,0} } , | |
| 555 { { 6, 9, 9,9 } , { 6, 9,12,6 } , { 15,18,0,0} , | |
| 556 { 6,15,12,0 } , { 6,12, 9,6 } , { 6,18,9,0} } }; | |
| 557 | |
| 558 if(i_stereo) /* i_stereo AND second channel -> do_layer3() checks this */ | |
| 559 slen = i_slen2[gr_info->scalefac_compress>>1]; | |
| 560 else | |
| 561 slen = n_slen2[gr_info->scalefac_compress]; | |
| 562 | |
| 563 gr_info->preflag = (slen>>15) & 0x1; | |
| 564 | |
| 565 n = 0; | |
| 566 if( gr_info->block_type == 2 ) { | |
| 567 n++; | |
| 568 if(gr_info->mixed_block_flag) | |
| 569 n++; | |
| 570 } | |
| 571 | |
| 572 pnt = stab[n][(slen>>12)&0x7]; | |
| 573 | |
| 574 for(i=0;i<4;i++) { | |
| 575 int num = slen & 0x7; | |
| 576 slen >>= 3; | |
| 577 if(num) { | |
| 578 for(j=0;j<(int)(pnt[i]);j++) | |
| 579 *scf++ = getbits_fast(num); | |
| 580 numbits += pnt[i] * num; | |
| 581 } | |
| 582 else { | |
| 583 for(j=0;j<(int)(pnt[i]);j++) | |
| 584 *scf++ = 0; | |
| 585 } | |
| 586 } | |
| 587 | |
| 588 n = (n << 1) + 1; | |
| 589 for(i=0;i<n;i++) | |
| 590 *scf++ = 0; | |
| 591 | |
| 592 return numbits; | |
| 593 } | |
| 594 | |
| 595 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}; | |
| 596 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}; | |
| 597 | |
| 598 /* | |
| 599 * don't forget to apply the same changes to III_dequantize_sample_ms() !!! | |
| 600 */ | |
| 601 static int III_dequantize_sample(real xr[SBLIMIT][SSLIMIT],int *scf, | |
| 602 struct gr_info_s *gr_info,int sfreq,int part2bits) | |
| 603 { | |
| 604 int shift = 1 + gr_info->scalefac_scale; | |
| 605 real *xrpnt = (real *) xr; | |
| 606 int l[3],l3; | |
| 607 int part2remain = gr_info->part2_3_length - part2bits; | |
| 608 int *me; | |
| 609 | |
| 610 { | |
| 611 int bv = gr_info->big_values; | |
| 612 int region1 = gr_info->region1start; | |
| 613 int region2 = gr_info->region2start; | |
| 614 | |
| 615 l3 = ((576>>1)-bv)>>1; | |
| 616 /* | |
| 617 * we may lose the 'odd' bit here !! | |
| 618 * check this later again | |
| 619 */ | |
| 620 if(bv <= region1) { | |
| 621 l[0] = bv; l[1] = 0; l[2] = 0; | |
| 622 } | |
| 623 else { | |
| 624 l[0] = region1; | |
| 625 if(bv <= region2) { | |
| 626 l[1] = bv - l[0]; l[2] = 0; | |
| 627 } | |
| 628 else { | |
| 629 l[1] = region2 - l[0]; l[2] = bv - region2; | |
| 630 } | |
| 631 } | |
| 632 } | |
| 633 | |
| 634 if(gr_info->block_type == 2) { | |
| 635 /* | |
| 636 * decoding with short or mixed mode BandIndex table | |
| 637 */ | |
| 638 int i,max[4]; | |
| 639 int step=0,lwin=0,cb=0; | |
| 640 register real v = 0.0; | |
| 641 register int *m,mc; | |
| 642 | |
| 643 if(gr_info->mixed_block_flag) { | |
| 644 max[3] = -1; | |
| 645 max[0] = max[1] = max[2] = 2; | |
| 646 m = map[sfreq][0]; | |
| 647 me = mapend[sfreq][0]; | |
| 648 } | |
| 649 else { | |
| 650 max[0] = max[1] = max[2] = max[3] = -1; | |
| 651 /* max[3] not really needed in this case */ | |
| 652 m = map[sfreq][1]; | |
| 653 me = mapend[sfreq][1]; | |
| 654 } | |
| 655 | |
| 656 mc = 0; | |
| 657 for(i=0;i<2;i++) { | |
| 658 int lp = l[i]; | |
| 659 struct newhuff *h = ht+gr_info->table_select[i]; | |
| 660 for(;lp;lp--,mc--) { | |
| 661 register int x,y; | |
| 662 if( (!mc) ) { | |
| 663 mc = *m++; | |
| 664 xrpnt = ((real *) xr) + (*m++); | |
| 665 lwin = *m++; | |
| 666 cb = *m++; | |
| 667 if(lwin == 3) { | |
| 668 v = gr_info->pow2gain[(*scf++) << shift]; | |
| 669 step = 1; | |
| 670 } | |
| 671 else { | |
| 672 v = gr_info->full_gain[lwin][(*scf++) << shift]; | |
| 673 step = 3; | |
| 674 } | |
| 675 } | |
| 676 { | |
| 677 register short *val = h->table; | |
| 678 while((y=*val++)<0) { | |
| 679 if (get1bit()) | |
| 680 val -= y; | |
| 681 part2remain--; | |
| 682 } | |
| 683 x = y >> 4; | |
| 684 y &= 0xf; | |
| 685 } | |
| 686 if(x == 15) { | |
| 687 max[lwin] = cb; | |
| 688 part2remain -= h->linbits+1; | |
| 689 x += getbits(h->linbits); | |
| 690 if(get1bit()) | |
| 691 *xrpnt = -ispow[x] * v; | |
| 692 else | |
| 693 *xrpnt = ispow[x] * v; | |
| 694 } | |
| 695 else if(x) { | |
| 696 max[lwin] = cb; | |
| 697 if(get1bit()) | |
| 698 *xrpnt = -ispow[x] * v; | |
| 699 else | |
| 700 *xrpnt = ispow[x] * v; | |
| 701 part2remain--; | |
| 702 } | |
| 703 else | |
| 704 *xrpnt = 0.0; | |
| 705 xrpnt += step; | |
| 706 if(y == 15) { | |
| 707 max[lwin] = cb; | |
| 708 part2remain -= h->linbits+1; | |
| 709 y += getbits(h->linbits); | |
| 710 if(get1bit()) | |
| 711 *xrpnt = -ispow[y] * v; | |
| 712 else | |
| 713 *xrpnt = ispow[y] * v; | |
| 714 } | |
| 715 else if(y) { | |
| 716 max[lwin] = cb; | |
| 717 if(get1bit()) | |
| 718 *xrpnt = -ispow[y] * v; | |
| 719 else | |
| 720 *xrpnt = ispow[y] * v; | |
| 721 part2remain--; | |
| 722 } | |
| 723 else | |
| 724 *xrpnt = 0.0; | |
| 725 xrpnt += step; | |
| 726 } | |
| 727 } | |
| 728 for(;l3 && (part2remain > 0);l3--) { | |
| 729 struct newhuff *h = htc+gr_info->count1table_select; | |
| 730 register short *val = h->table,a; | |
| 731 | |
| 732 while((a=*val++)<0) { | |
| 733 part2remain--; | |
| 734 if(part2remain < 0) { | |
| 735 part2remain++; | |
| 736 a = 0; | |
| 737 break; | |
| 738 } | |
| 739 if (get1bit()) | |
| 740 val -= a; | |
| 741 } | |
| 742 | |
| 743 for(i=0;i<4;i++) { | |
| 744 if(!(i & 1)) { | |
| 745 if(!mc) { | |
| 746 mc = *m++; | |
| 747 xrpnt = ((real *) xr) + (*m++); | |
| 748 lwin = *m++; | |
| 749 cb = *m++; | |
| 750 if(lwin == 3) { | |
| 751 v = gr_info->pow2gain[(*scf++) << shift]; | |
| 752 step = 1; | |
| 753 } | |
| 754 else { | |
| 755 v = gr_info->full_gain[lwin][(*scf++) << shift]; | |
| 756 step = 3; | |
| 757 } | |
| 758 } | |
| 759 mc--; | |
| 760 } | |
| 761 if( (a & (0x8>>i)) ) { | |
| 762 max[lwin] = cb; | |
| 763 part2remain--; | |
| 764 if(part2remain < 0) { | |
| 765 part2remain++; | |
| 766 break; | |
| 767 } | |
| 768 if(get1bit()) | |
| 769 *xrpnt = -v; | |
| 770 else | |
| 771 *xrpnt = v; | |
| 772 } | |
| 773 else | |
| 774 *xrpnt = 0.0; | |
| 775 xrpnt += step; | |
| 776 } | |
| 777 } | |
| 778 | |
| 779 while( m < me ) { | |
| 780 if(!mc) { | |
| 781 mc = *m++; | |
| 782 xrpnt = ((real *) xr) + *m++; | |
| 783 if( (*m++) == 3) | |
| 784 step = 1; | |
| 785 else | |
| 786 step = 3; | |
| 787 m++; /* cb */ | |
| 788 } | |
| 789 mc--; | |
| 790 *xrpnt = 0.0; | |
| 791 xrpnt += step; | |
| 792 *xrpnt = 0.0; | |
| 793 xrpnt += step; | |
| 794 /* we could add a little opt. here: | |
| 795 * if we finished a band for window 3 or a long band | |
| 796 * further bands could copied in a simple loop without a | |
| 797 * special 'map' decoding | |
| 798 */ | |
| 799 } | |
| 800 | |
| 801 gr_info->maxband[0] = max[0]+1; | |
| 802 gr_info->maxband[1] = max[1]+1; | |
| 803 gr_info->maxband[2] = max[2]+1; | |
| 804 gr_info->maxbandl = max[3]+1; | |
| 805 | |
| 806 { | |
| 807 int rmax = max[0] > max[1] ? max[0] : max[1]; | |
| 808 rmax = (rmax > max[2] ? rmax : max[2]) + 1; | |
| 809 gr_info->maxb = rmax ? shortLimit[sfreq][rmax] : longLimit[sfreq][max[3]+1]; | |
| 810 } | |
| 811 | |
| 812 } | |
| 813 else { | |
| 814 /* | |
| 815 * decoding with 'long' BandIndex table (block_type != 2) | |
| 816 */ | |
| 817 int *pretab = gr_info->preflag ? pretab1 : pretab2; | |
| 818 int i,max = -1; | |
| 819 int cb = 0; | |
| 820 register int *m = map[sfreq][2]; | |
| 821 register real v = 0.0; | |
| 822 register int mc = 0; | |
| 823 #if 0 | |
| 824 me = mapend[sfreq][2]; | |
| 825 #endif | |
| 826 | |
| 827 /* | |
| 828 * long hash table values | |
| 829 */ | |
| 830 for(i=0;i<3;i++) { | |
| 831 int lp = l[i]; | |
| 832 struct newhuff *h = ht+gr_info->table_select[i]; | |
| 833 | |
| 834 for(;lp;lp--,mc--) { | |
| 835 int x,y; | |
| 836 | |
| 837 if(!mc) { | |
| 838 mc = *m++; | |
| 839 v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift]; | |
| 840 cb = *m++; | |
| 841 } | |
| 842 { | |
| 843 register short *val = h->table; | |
| 844 while((y=*val++)<0) { | |
| 845 if (get1bit()) | |
| 846 val -= y; | |
| 847 part2remain--; | |
| 848 } | |
| 849 x = y >> 4; | |
| 850 y &= 0xf; | |
| 851 } | |
| 852 if (x == 15) { | |
| 853 max = cb; | |
| 854 part2remain -= h->linbits+1; | |
| 855 x += getbits(h->linbits); | |
| 856 if(get1bit()) | |
| 857 *xrpnt++ = -ispow[x] * v; | |
| 858 else | |
| 859 *xrpnt++ = ispow[x] * v; | |
| 860 } | |
| 861 else if(x) { | |
| 862 max = cb; | |
| 863 if(get1bit()) | |
| 864 *xrpnt++ = -ispow[x] * v; | |
| 865 else | |
| 866 *xrpnt++ = ispow[x] * v; | |
| 867 part2remain--; | |
| 868 } | |
| 869 else | |
| 870 *xrpnt++ = 0.0; | |
| 871 | |
| 872 if (y == 15) { | |
| 873 max = cb; | |
| 874 part2remain -= h->linbits+1; | |
| 875 y += getbits(h->linbits); | |
| 876 if(get1bit()) | |
| 877 *xrpnt++ = -ispow[y] * v; | |
| 878 else | |
| 879 *xrpnt++ = ispow[y] * v; | |
| 880 } | |
| 881 else if(y) { | |
| 882 max = cb; | |
| 883 if(get1bit()) | |
| 884 *xrpnt++ = -ispow[y] * v; | |
| 885 else | |
| 886 *xrpnt++ = ispow[y] * v; | |
| 887 part2remain--; | |
| 888 } | |
| 889 else | |
| 890 *xrpnt++ = 0.0; | |
| 891 } | |
| 892 } | |
| 893 | |
| 894 /* | |
| 895 * short (count1table) values | |
| 896 */ | |
| 897 for(;l3 && (part2remain > 0);l3--) { | |
| 898 struct newhuff *h = htc+gr_info->count1table_select; | |
| 899 register short *val = h->table,a; | |
| 900 | |
| 901 while((a=*val++)<0) { | |
| 902 part2remain--; | |
| 903 if(part2remain < 0) { | |
| 904 part2remain++; | |
| 905 a = 0; | |
| 906 break; | |
| 907 } | |
| 908 if (get1bit()) | |
| 909 val -= a; | |
| 910 } | |
| 911 | |
| 912 for(i=0;i<4;i++) { | |
| 913 if(!(i & 1)) { | |
| 914 if(!mc) { | |
| 915 mc = *m++; | |
| 916 cb = *m++; | |
| 917 v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift]; | |
| 918 } | |
| 919 mc--; | |
| 920 } | |
| 921 if ( (a & (0x8>>i)) ) { | |
| 922 max = cb; | |
| 923 part2remain--; | |
| 924 if(part2remain < 0) { | |
| 925 part2remain++; | |
| 926 break; | |
| 927 } | |
| 928 if(get1bit()) | |
| 929 *xrpnt++ = -v; | |
| 930 else | |
| 931 *xrpnt++ = v; | |
| 932 } | |
| 933 else | |
| 934 *xrpnt++ = 0.0; | |
| 935 } | |
| 936 } | |
| 937 | |
| 938 /* | |
| 939 * zero part | |
| 940 */ | |
| 941 for(i=(&xr[SBLIMIT][0]-xrpnt)>>1;i;i--) { | |
| 942 *xrpnt++ = 0.0; | |
| 943 *xrpnt++ = 0.0; | |
| 944 } | |
| 945 | |
| 946 gr_info->maxbandl = max+1; | |
| 947 gr_info->maxb = longLimit[sfreq][gr_info->maxbandl]; | |
| 948 } | |
| 949 | |
| 950 while( part2remain > 16 ) { | |
| 951 getbits(16); /* Dismiss stuffing Bits */ | |
| 952 part2remain -= 16; | |
| 953 } | |
| 954 if(part2remain > 0) | |
| 955 getbits(part2remain); | |
| 956 else if(part2remain < 0) { | |
| 400 | 957 char err[128]; |
| 958 snprintf(err, sizeof (err), | |
| 959 "MPGLIB: Can't rewind stream by %d bits!", | |
| 960 -part2remain); | |
| 961 BAIL_MACRO(err, 1); /* -> error */ | |
| 261 | 962 } |
| 963 return 0; | |
| 964 } | |
| 965 | |
| 966 #if 0 | |
| 967 static int III_dequantize_sample_ms(real xr[2][SBLIMIT][SSLIMIT],int *scf, | |
| 968 struct gr_info_s *gr_info,int sfreq,int part2bits) | |
| 969 { | |
| 970 int shift = 1 + gr_info->scalefac_scale; | |
| 971 real *xrpnt = (real *) xr[1]; | |
| 972 real *xr0pnt = (real *) xr[0]; | |
| 973 int l[3],l3; | |
| 974 int part2remain = gr_info->part2_3_length - part2bits; | |
| 975 int *me; | |
| 976 | |
| 977 { | |
| 978 int bv = gr_info->big_values; | |
| 979 int region1 = gr_info->region1start; | |
| 980 int region2 = gr_info->region2start; | |
| 981 | |
| 982 l3 = ((576>>1)-bv)>>1; | |
| 983 /* | |
| 984 * we may lose the 'odd' bit here !! | |
| 985 * check this later gain | |
| 986 */ | |
| 987 if(bv <= region1) { | |
| 988 l[0] = bv; l[1] = 0; l[2] = 0; | |
| 989 } | |
| 990 else { | |
| 991 l[0] = region1; | |
| 992 if(bv <= region2) { | |
| 993 l[1] = bv - l[0]; l[2] = 0; | |
| 994 } | |
| 995 else { | |
| 996 l[1] = region2 - l[0]; l[2] = bv - region2; | |
| 997 } | |
| 998 } | |
| 999 } | |
| 1000 | |
| 1001 if(gr_info->block_type == 2) { | |
| 1002 int i,max[4]; | |
| 1003 int step=0,lwin=0,cb=0; | |
| 1004 register real v = 0.0; | |
| 1005 register int *m,mc = 0; | |
| 1006 | |
| 1007 if(gr_info->mixed_block_flag) { | |
| 1008 max[3] = -1; | |
| 1009 max[0] = max[1] = max[2] = 2; | |
| 1010 m = map[sfreq][0]; | |
| 1011 me = mapend[sfreq][0]; | |
| 1012 } | |
| 1013 else { | |
| 1014 max[0] = max[1] = max[2] = max[3] = -1; | |
| 1015 /* max[3] not really needed in this case */ | |
| 1016 m = map[sfreq][1]; | |
| 1017 me = mapend[sfreq][1]; | |
| 1018 } | |
| 1019 | |
| 1020 for(i=0;i<2;i++) { | |
| 1021 int lp = l[i]; | |
| 1022 struct newhuff *h = ht+gr_info->table_select[i]; | |
| 1023 for(;lp;lp--,mc--) { | |
| 1024 int x,y; | |
| 1025 | |
| 1026 if(!mc) { | |
| 1027 mc = *m++; | |
| 1028 xrpnt = ((real *) xr[1]) + *m; | |
| 1029 xr0pnt = ((real *) xr[0]) + *m++; | |
| 1030 lwin = *m++; | |
| 1031 cb = *m++; | |
| 1032 if(lwin == 3) { | |
| 1033 v = gr_info->pow2gain[(*scf++) << shift]; | |
| 1034 step = 1; | |
| 1035 } | |
| 1036 else { | |
| 1037 v = gr_info->full_gain[lwin][(*scf++) << shift]; | |
| 1038 step = 3; | |
| 1039 } | |
| 1040 } | |
| 1041 { | |
| 1042 register short *val = h->table; | |
| 1043 while((y=*val++)<0) { | |
| 1044 if (get1bit()) | |
| 1045 val -= y; | |
| 1046 part2remain--; | |
| 1047 } | |
| 1048 x = y >> 4; | |
| 1049 y &= 0xf; | |
| 1050 } | |
| 1051 if(x == 15) { | |
| 1052 max[lwin] = cb; | |
| 1053 part2remain -= h->linbits+1; | |
| 1054 x += getbits(h->linbits); | |
| 1055 if(get1bit()) { | |
| 1056 real a = ispow[x] * v; | |
| 1057 *xrpnt = *xr0pnt + a; | |
| 1058 *xr0pnt -= a; | |
| 1059 } | |
| 1060 else { | |
| 1061 real a = ispow[x] * v; | |
| 1062 *xrpnt = *xr0pnt - a; | |
| 1063 *xr0pnt += a; | |
| 1064 } | |
| 1065 } | |
| 1066 else if(x) { | |
| 1067 max[lwin] = cb; | |
| 1068 if(get1bit()) { | |
| 1069 real a = ispow[x] * v; | |
| 1070 *xrpnt = *xr0pnt + a; | |
| 1071 *xr0pnt -= a; | |
| 1072 } | |
| 1073 else { | |
| 1074 real a = ispow[x] * v; | |
| 1075 *xrpnt = *xr0pnt - a; | |
| 1076 *xr0pnt += a; | |
| 1077 } | |
| 1078 part2remain--; | |
| 1079 } | |
| 1080 else | |
| 1081 *xrpnt = *xr0pnt; | |
| 1082 xrpnt += step; | |
| 1083 xr0pnt += step; | |
| 1084 | |
| 1085 if(y == 15) { | |
| 1086 max[lwin] = cb; | |
| 1087 part2remain -= h->linbits+1; | |
| 1088 y += getbits(h->linbits); | |
| 1089 if(get1bit()) { | |
| 1090 real a = ispow[y] * v; | |
| 1091 *xrpnt = *xr0pnt + a; | |
| 1092 *xr0pnt -= a; | |
| 1093 } | |
| 1094 else { | |
| 1095 real a = ispow[y] * v; | |
| 1096 *xrpnt = *xr0pnt - a; | |
| 1097 *xr0pnt += a; | |
| 1098 } | |
| 1099 } | |
| 1100 else if(y) { | |
| 1101 max[lwin] = cb; | |
| 1102 if(get1bit()) { | |
| 1103 real a = ispow[y] * v; | |
| 1104 *xrpnt = *xr0pnt + a; | |
| 1105 *xr0pnt -= a; | |
| 1106 } | |
| 1107 else { | |
| 1108 real a = ispow[y] * v; | |
| 1109 *xrpnt = *xr0pnt - a; | |
| 1110 *xr0pnt += a; | |
| 1111 } | |
| 1112 part2remain--; | |
| 1113 } | |
| 1114 else | |
| 1115 *xrpnt = *xr0pnt; | |
| 1116 xrpnt += step; | |
| 1117 xr0pnt += step; | |
| 1118 } | |
| 1119 } | |
| 1120 | |
| 1121 for(;l3 && (part2remain > 0);l3--) { | |
| 1122 struct newhuff *h = htc+gr_info->count1table_select; | |
| 1123 register short *val = h->table,a; | |
| 1124 | |
| 1125 while((a=*val++)<0) { | |
| 1126 part2remain--; | |
| 1127 if(part2remain < 0) { | |
| 1128 part2remain++; | |
| 1129 a = 0; | |
| 1130 break; | |
| 1131 } | |
| 1132 if (get1bit()) | |
| 1133 val -= a; | |
| 1134 } | |
| 1135 | |
| 1136 for(i=0;i<4;i++) { | |
| 1137 if(!(i & 1)) { | |
| 1138 if(!mc) { | |
| 1139 mc = *m++; | |
| 1140 xrpnt = ((real *) xr[1]) + *m; | |
| 1141 xr0pnt = ((real *) xr[0]) + *m++; | |
| 1142 lwin = *m++; | |
| 1143 cb = *m++; | |
| 1144 if(lwin == 3) { | |
| 1145 v = gr_info->pow2gain[(*scf++) << shift]; | |
| 1146 step = 1; | |
| 1147 } | |
| 1148 else { | |
| 1149 v = gr_info->full_gain[lwin][(*scf++) << shift]; | |
| 1150 step = 3; | |
| 1151 } | |
| 1152 } | |
| 1153 mc--; | |
| 1154 } | |
| 1155 if( (a & (0x8>>i)) ) { | |
| 1156 max[lwin] = cb; | |
| 1157 part2remain--; | |
| 1158 if(part2remain < 0) { | |
| 1159 part2remain++; | |
| 1160 break; | |
| 1161 } | |
| 1162 if(get1bit()) { | |
| 1163 *xrpnt = *xr0pnt + v; | |
| 1164 *xr0pnt -= v; | |
| 1165 } | |
| 1166 else { | |
| 1167 *xrpnt = *xr0pnt - v; | |
| 1168 *xr0pnt += v; | |
| 1169 } | |
| 1170 } | |
| 1171 else | |
| 1172 *xrpnt = *xr0pnt; | |
| 1173 xrpnt += step; | |
| 1174 xr0pnt += step; | |
| 1175 } | |
| 1176 } | |
| 1177 | |
| 1178 while( m < me ) { | |
| 1179 if(!mc) { | |
| 1180 mc = *m++; | |
| 1181 xrpnt = ((real *) xr[1]) + *m; | |
| 1182 xr0pnt = ((real *) xr[0]) + *m++; | |
| 1183 if(*m++ == 3) | |
| 1184 step = 1; | |
| 1185 else | |
| 1186 step = 3; | |
| 1187 m++; /* cb */ | |
| 1188 } | |
| 1189 mc--; | |
| 1190 *xrpnt = *xr0pnt; | |
| 1191 xrpnt += step; | |
| 1192 xr0pnt += step; | |
| 1193 *xrpnt = *xr0pnt; | |
| 1194 xrpnt += step; | |
| 1195 xr0pnt += step; | |
| 1196 /* we could add a little opt. here: | |
| 1197 * if we finished a band for window 3 or a long band | |
| 1198 * further bands could copied in a simple loop without a | |
| 1199 * special 'map' decoding | |
| 1200 */ | |
| 1201 } | |
| 1202 | |
| 1203 gr_info->maxband[0] = max[0]+1; | |
| 1204 gr_info->maxband[1] = max[1]+1; | |
| 1205 gr_info->maxband[2] = max[2]+1; | |
| 1206 gr_info->maxbandl = max[3]+1; | |
| 1207 | |
| 1208 { | |
| 1209 int rmax = max[0] > max[1] ? max[0] : max[1]; | |
| 1210 rmax = (rmax > max[2] ? rmax : max[2]) + 1; | |
| 1211 gr_info->maxb = rmax ? shortLimit[sfreq][rmax] : longLimit[sfreq][max[3]+1]; | |
| 1212 } | |
| 1213 } | |
| 1214 else { | |
| 1215 int *pretab = gr_info->preflag ? pretab1 : pretab2; | |
| 1216 int i,max = -1; | |
| 1217 int cb = 0; | |
| 1218 register int mc=0,*m = map[sfreq][2]; | |
| 1219 register real v = 0.0; | |
| 1220 #if 0 | |
| 1221 me = mapend[sfreq][2]; | |
| 1222 #endif | |
| 1223 | |
| 1224 for(i=0;i<3;i++) { | |
| 1225 int lp = l[i]; | |
| 1226 struct newhuff *h = ht+gr_info->table_select[i]; | |
| 1227 | |
| 1228 for(;lp;lp--,mc--) { | |
| 1229 int x,y; | |
| 1230 if(!mc) { | |
| 1231 mc = *m++; | |
| 1232 cb = *m++; | |
| 1233 v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift]; | |
| 1234 } | |
| 1235 { | |
| 1236 register short *val = h->table; | |
| 1237 while((y=*val++)<0) { | |
| 1238 if (get1bit()) | |
| 1239 val -= y; | |
| 1240 part2remain--; | |
| 1241 } | |
| 1242 x = y >> 4; | |
| 1243 y &= 0xf; | |
| 1244 } | |
| 1245 if (x == 15) { | |
| 1246 max = cb; | |
| 1247 part2remain -= h->linbits+1; | |
| 1248 x += getbits(h->linbits); | |
| 1249 if(get1bit()) { | |
| 1250 real a = ispow[x] * v; | |
| 1251 *xrpnt++ = *xr0pnt + a; | |
| 1252 *xr0pnt++ -= a; | |
| 1253 } | |
| 1254 else { | |
| 1255 real a = ispow[x] * v; | |
| 1256 *xrpnt++ = *xr0pnt - a; | |
| 1257 *xr0pnt++ += a; | |
| 1258 } | |
| 1259 } | |
| 1260 else if(x) { | |
| 1261 max = cb; | |
| 1262 if(get1bit()) { | |
| 1263 real a = ispow[x] * v; | |
| 1264 *xrpnt++ = *xr0pnt + a; | |
| 1265 *xr0pnt++ -= a; | |
| 1266 } | |
| 1267 else { | |
| 1268 real a = ispow[x] * v; | |
| 1269 *xrpnt++ = *xr0pnt - a; | |
| 1270 *xr0pnt++ += a; | |
| 1271 } | |
| 1272 part2remain--; | |
| 1273 } | |
| 1274 else | |
| 1275 *xrpnt++ = *xr0pnt++; | |
| 1276 | |
| 1277 if (y == 15) { | |
| 1278 max = cb; | |
| 1279 part2remain -= h->linbits+1; | |
| 1280 y += getbits(h->linbits); | |
| 1281 if(get1bit()) { | |
| 1282 real a = ispow[y] * v; | |
| 1283 *xrpnt++ = *xr0pnt + a; | |
| 1284 *xr0pnt++ -= a; | |
| 1285 } | |
| 1286 else { | |
| 1287 real a = ispow[y] * v; | |
| 1288 *xrpnt++ = *xr0pnt - a; | |
| 1289 *xr0pnt++ += a; | |
| 1290 } | |
| 1291 } | |
| 1292 else if(y) { | |
| 1293 max = cb; | |
| 1294 if(get1bit()) { | |
| 1295 real a = ispow[y] * v; | |
| 1296 *xrpnt++ = *xr0pnt + a; | |
| 1297 *xr0pnt++ -= a; | |
| 1298 } | |
| 1299 else { | |
| 1300 real a = ispow[y] * v; | |
| 1301 *xrpnt++ = *xr0pnt - a; | |
| 1302 *xr0pnt++ += a; | |
| 1303 } | |
| 1304 part2remain--; | |
| 1305 } | |
| 1306 else | |
| 1307 *xrpnt++ = *xr0pnt++; | |
| 1308 } | |
| 1309 } | |
| 1310 | |
| 1311 for(;l3 && (part2remain > 0);l3--) { | |
| 1312 struct newhuff *h = htc+gr_info->count1table_select; | |
| 1313 register short *val = h->table,a; | |
| 1314 | |
| 1315 while((a=*val++)<0) { | |
| 1316 part2remain--; | |
| 1317 if(part2remain < 0) { | |
| 1318 part2remain++; | |
| 1319 a = 0; | |
| 1320 break; | |
| 1321 } | |
| 1322 if (get1bit()) | |
| 1323 val -= a; | |
| 1324 } | |
| 1325 | |
| 1326 for(i=0;i<4;i++) { | |
| 1327 if(!(i & 1)) { | |
| 1328 if(!mc) { | |
| 1329 mc = *m++; | |
| 1330 cb = *m++; | |
| 1331 v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift]; | |
| 1332 } | |
| 1333 mc--; | |
| 1334 } | |
| 1335 if ( (a & (0x8>>i)) ) { | |
| 1336 max = cb; | |
| 1337 part2remain--; | |
| 1338 if(part2remain <= 0) { | |
| 1339 part2remain++; | |
| 1340 break; | |
| 1341 } | |
| 1342 if(get1bit()) { | |
| 1343 *xrpnt++ = *xr0pnt + v; | |
| 1344 *xr0pnt++ -= v; | |
| 1345 } | |
| 1346 else { | |
| 1347 *xrpnt++ = *xr0pnt - v; | |
| 1348 *xr0pnt++ += v; | |
| 1349 } | |
| 1350 } | |
| 1351 else | |
| 1352 *xrpnt++ = *xr0pnt++; | |
| 1353 } | |
| 1354 } | |
| 1355 for(i=(&xr[1][SBLIMIT][0]-xrpnt)>>1;i;i--) { | |
| 1356 *xrpnt++ = *xr0pnt++; | |
| 1357 *xrpnt++ = *xr0pnt++; | |
| 1358 } | |
| 1359 | |
| 1360 gr_info->maxbandl = max+1; | |
| 1361 gr_info->maxb = longLimit[sfreq][gr_info->maxbandl]; | |
| 1362 } | |
| 1363 | |
| 1364 while ( part2remain > 16 ) { | |
| 1365 getbits(16); /* Dismiss stuffing Bits */ | |
| 1366 part2remain -= 16; | |
| 1367 } | |
| 1368 if(part2remain > 0 ) | |
| 1369 getbits(part2remain); | |
| 1370 else if(part2remain < 0) { | |
| 400 | 1371 char err[128]; |
| 1372 snprintf(err, sizeof (err), | |
| 1373 "MPGLIB: Can't rewind stream by %d bits!", | |
| 1374 -part2remain); | |
| 1375 BAIL_MACRO(err, 1); /* -> error */ | |
| 261 | 1376 } |
| 1377 return 0; | |
| 1378 } | |
| 1379 #endif | |
| 1380 | |
| 1381 /* | |
| 1382 * III_stereo: calculate real channel values for Joint-I-Stereo-mode | |
| 1383 */ | |
| 1384 static void III_i_stereo(real xr_buf[2][SBLIMIT][SSLIMIT],int *scalefac, | |
| 1385 struct gr_info_s *gr_info,int sfreq,int ms_stereo,int lsf) | |
| 1386 { | |
| 1387 real (*xr)[SBLIMIT*SSLIMIT] = (real (*)[SBLIMIT*SSLIMIT] ) xr_buf; | |
| 1388 struct bandInfoStruct *bi = &bandInfo[sfreq]; | |
| 1389 real *tab1,*tab2; | |
| 1390 | |
| 1391 if(lsf) { | |
| 1392 int p = gr_info->scalefac_compress & 0x1; | |
| 1393 if(ms_stereo) { | |
| 1394 tab1 = pow1_2[p]; tab2 = pow2_2[p]; | |
| 1395 } | |
| 1396 else { | |
| 1397 tab1 = pow1_1[p]; tab2 = pow2_1[p]; | |
| 1398 } | |
| 1399 } | |
| 1400 else { | |
| 1401 if(ms_stereo) { | |
| 1402 tab1 = tan1_2; tab2 = tan2_2; | |
| 1403 } | |
| 1404 else { | |
| 1405 tab1 = tan1_1; tab2 = tan2_1; | |
| 1406 } | |
| 1407 } | |
| 1408 | |
| 1409 if (gr_info->block_type == 2) | |
| 1410 { | |
| 1411 int lwin,do_l = 0; | |
| 1412 if( gr_info->mixed_block_flag ) | |
| 1413 do_l = 1; | |
| 1414 | |
| 1415 for (lwin=0;lwin<3;lwin++) /* process each window */ | |
| 1416 { | |
| 1417 /* get first band with zero values */ | |
| 1418 int is_p,sb,idx,sfb = gr_info->maxband[lwin]; /* sfb is minimal 3 for mixed mode */ | |
| 1419 if(sfb > 3) | |
| 1420 do_l = 0; | |
| 1421 | |
| 1422 for(;sfb<12;sfb++) | |
| 1423 { | |
| 1424 is_p = scalefac[sfb*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */ | |
| 1425 if(is_p != 7) { | |
| 1426 real t1,t2; | |
| 1427 sb = bi->shortDiff[sfb]; | |
| 1428 idx = bi->shortIdx[sfb] + lwin; | |
| 1429 t1 = tab1[is_p]; t2 = tab2[is_p]; | |
| 1430 for (; sb > 0; sb--,idx+=3) | |
| 1431 { | |
| 1432 real v = xr[0][idx]; | |
| 1433 xr[0][idx] = v * t1; | |
| 1434 xr[1][idx] = v * t2; | |
| 1435 } | |
| 1436 } | |
| 1437 } | |
| 1438 | |
| 1439 #if 1 | |
| 1440 /* in the original: copy 10 to 11 , here: copy 11 to 12 | |
| 1441 maybe still wrong??? (copy 12 to 13?) */ | |
| 1442 is_p = scalefac[11*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */ | |
| 1443 sb = bi->shortDiff[12]; | |
| 1444 idx = bi->shortIdx[12] + lwin; | |
| 1445 #else | |
| 1446 is_p = scalefac[10*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */ | |
| 1447 sb = bi->shortDiff[11]; | |
| 1448 idx = bi->shortIdx[11] + lwin; | |
| 1449 #endif | |
| 1450 if(is_p != 7) | |
| 1451 { | |
| 1452 real t1,t2; | |
| 1453 t1 = tab1[is_p]; t2 = tab2[is_p]; | |
| 1454 for ( ; sb > 0; sb--,idx+=3 ) | |
| 1455 { | |
| 1456 real v = xr[0][idx]; | |
| 1457 xr[0][idx] = v * t1; | |
| 1458 xr[1][idx] = v * t2; | |
| 1459 } | |
| 1460 } | |
| 1461 } /* end for(lwin; .. ; . ) */ | |
| 1462 | |
| 1463 if (do_l) | |
| 1464 { | |
| 1465 /* also check l-part, if ALL bands in the three windows are 'empty' | |
| 1466 * and mode = mixed_mode | |
| 1467 */ | |
| 1468 int sfb = gr_info->maxbandl; | |
| 1469 int idx = bi->longIdx[sfb]; | |
| 1470 | |
| 1471 for ( ; sfb<8; sfb++ ) | |
| 1472 { | |
| 1473 int sb = bi->longDiff[sfb]; | |
| 1474 int is_p = scalefac[sfb]; /* scale: 0-15 */ | |
| 1475 if(is_p != 7) { | |
| 1476 real t1,t2; | |
| 1477 t1 = tab1[is_p]; t2 = tab2[is_p]; | |
| 1478 for ( ; sb > 0; sb--,idx++) | |
| 1479 { | |
| 1480 real v = xr[0][idx]; | |
| 1481 xr[0][idx] = v * t1; | |
| 1482 xr[1][idx] = v * t2; | |
| 1483 } | |
| 1484 } | |
| 1485 else | |
| 1486 idx += sb; | |
| 1487 } | |
| 1488 } | |
| 1489 } | |
| 1490 else /* ((gr_info->block_type != 2)) */ | |
| 1491 { | |
| 1492 int sfb = gr_info->maxbandl; | |
| 1493 int is_p,idx = bi->longIdx[sfb]; | |
| 1494 for ( ; sfb<21; sfb++) | |
| 1495 { | |
| 1496 int sb = bi->longDiff[sfb]; | |
| 1497 is_p = scalefac[sfb]; /* scale: 0-15 */ | |
| 1498 if(is_p != 7) { | |
| 1499 real t1,t2; | |
| 1500 t1 = tab1[is_p]; t2 = tab2[is_p]; | |
| 1501 for ( ; sb > 0; sb--,idx++) | |
| 1502 { | |
| 1503 real v = xr[0][idx]; | |
| 1504 xr[0][idx] = v * t1; | |
| 1505 xr[1][idx] = v * t2; | |
| 1506 } | |
| 1507 } | |
| 1508 else | |
| 1509 idx += sb; | |
| 1510 } | |
| 1511 | |
| 1512 is_p = scalefac[20]; /* copy l-band 20 to l-band 21 */ | |
| 1513 if(is_p != 7) | |
| 1514 { | |
| 1515 int sb; | |
| 1516 real t1 = tab1[is_p],t2 = tab2[is_p]; | |
| 1517 | |
| 1518 for ( sb = bi->longDiff[21]; sb > 0; sb--,idx++ ) | |
| 1519 { | |
| 1520 real v = xr[0][idx]; | |
| 1521 xr[0][idx] = v * t1; | |
| 1522 xr[1][idx] = v * t2; | |
| 1523 } | |
| 1524 } | |
| 1525 } /* ... */ | |
| 1526 } | |
| 1527 | |
| 1528 static void III_antialias(real xr[SBLIMIT][SSLIMIT],struct gr_info_s *gr_info) | |
| 1529 { | |
| 1530 int sblim; | |
| 1531 | |
| 1532 if(gr_info->block_type == 2) | |
| 1533 { | |
| 1534 if(!gr_info->mixed_block_flag) | |
| 1535 return; | |
| 1536 sblim = 1; | |
| 1537 } | |
| 1538 else { | |
| 1539 sblim = gr_info->maxb-1; | |
| 1540 } | |
| 1541 | |
| 1542 /* 31 alias-reduction operations between each pair of sub-bands */ | |
| 1543 /* with 8 butterflies between each pair */ | |
| 1544 | |
| 1545 { | |
| 1546 int sb; | |
| 1547 real *xr1=(real *) xr[1]; | |
| 1548 | |
| 1549 for(sb=sblim;sb;sb--,xr1+=10) | |
| 1550 { | |
| 1551 int ss; | |
| 1552 real *cs=aa_cs,*ca=aa_ca; | |
| 1553 real *xr2 = xr1; | |
| 1554 | |
| 1555 for(ss=7;ss>=0;ss--) | |
| 1556 { /* upper and lower butterfly inputs */ | |
| 1557 register real bu = *--xr2,bd = *xr1; | |
| 1558 *xr2 = (bu * (*cs) ) - (bd * (*ca) ); | |
| 1559 *xr1++ = (bd * (*cs++) ) + (bu * (*ca++) ); | |
| 1560 } | |
| 1561 } | |
| 1562 } | |
| 1563 } | |
| 1564 | |
| 1565 /* | |
| 1566 DCT insipired by Jeff Tsay's DCT from the maplay package | |
| 1567 this is an optimized version with manual unroll. | |
| 1568 | |
| 1569 References: | |
| 1570 [1] S. Winograd: "On Computing the Discrete Fourier Transform", | |
| 1571 Mathematics of Computation, Volume 32, Number 141, January 1978, | |
| 1572 Pages 175-199 | |
| 1573 */ | |
| 1574 | |
| 1575 static void dct36(real *inbuf,real *o1,real *o2,real *wintab,real *tsbuf) | |
| 1576 { | |
| 1577 { | |
| 1578 register real *in = inbuf; | |
| 1579 | |
| 1580 in[17]+=in[16]; in[16]+=in[15]; in[15]+=in[14]; | |
| 1581 in[14]+=in[13]; in[13]+=in[12]; in[12]+=in[11]; | |
| 1582 in[11]+=in[10]; in[10]+=in[9]; in[9] +=in[8]; | |
| 1583 in[8] +=in[7]; in[7] +=in[6]; in[6] +=in[5]; | |
| 1584 in[5] +=in[4]; in[4] +=in[3]; in[3] +=in[2]; | |
| 1585 in[2] +=in[1]; in[1] +=in[0]; | |
| 1586 | |
| 1587 in[17]+=in[15]; in[15]+=in[13]; in[13]+=in[11]; in[11]+=in[9]; | |
| 1588 in[9] +=in[7]; in[7] +=in[5]; in[5] +=in[3]; in[3] +=in[1]; | |
| 1589 | |
| 1590 | |
| 1591 { | |
| 1592 | |
| 1593 #define MACRO0(v) { \ | |
| 1594 real tmp; \ | |
| 1595 out2[9+(v)] = (tmp = sum0 + sum1) * w[27+(v)]; \ | |
| 1596 out2[8-(v)] = tmp * w[26-(v)]; } \ | |
| 1597 sum0 -= sum1; \ | |
| 1598 ts[SBLIMIT*(8-(v))] = out1[8-(v)] + sum0 * w[8-(v)]; \ | |
| 1599 ts[SBLIMIT*(9+(v))] = out1[9+(v)] + sum0 * w[9+(v)]; | |
| 1600 #define MACRO1(v) { \ | |
| 1601 real sum0,sum1; \ | |
| 1602 sum0 = tmp1a + tmp2a; \ | |
| 1603 sum1 = (tmp1b + tmp2b) * tfcos36[(v)]; \ | |
| 1604 MACRO0(v); } | |
| 1605 #define MACRO2(v) { \ | |
| 1606 real sum0,sum1; \ | |
| 1607 sum0 = tmp2a - tmp1a; \ | |
| 1608 sum1 = (tmp2b - tmp1b) * tfcos36[(v)]; \ | |
| 1609 MACRO0(v); } | |
| 1610 | |
| 1611 register const real *c = COS9; | |
| 1612 register real *out2 = o2; | |
| 1613 register real *w = wintab; | |
| 1614 register real *out1 = o1; | |
| 1615 register real *ts = tsbuf; | |
| 1616 | |
| 1617 real ta33,ta66,tb33,tb66; | |
| 1618 | |
| 1619 ta33 = in[2*3+0] * c[3]; | |
| 1620 ta66 = in[2*6+0] * c[6]; | |
| 1621 tb33 = in[2*3+1] * c[3]; | |
| 1622 tb66 = in[2*6+1] * c[6]; | |
| 1623 | |
| 1624 { | |
| 1625 real tmp1a,tmp2a,tmp1b,tmp2b; | |
| 1626 tmp1a = in[2*1+0] * c[1] + ta33 + in[2*5+0] * c[5] + in[2*7+0] * c[7]; | |
| 1627 tmp1b = in[2*1+1] * c[1] + tb33 + in[2*5+1] * c[5] + in[2*7+1] * c[7]; | |
| 1628 tmp2a = in[2*0+0] + in[2*2+0] * c[2] + in[2*4+0] * c[4] + ta66 + in[2*8+0] * c[8]; | |
| 1629 tmp2b = in[2*0+1] + in[2*2+1] * c[2] + in[2*4+1] * c[4] + tb66 + in[2*8+1] * c[8]; | |
| 1630 | |
| 1631 MACRO1(0); | |
| 1632 MACRO2(8); | |
| 1633 } | |
| 1634 | |
| 1635 { | |
| 1636 real tmp1a,tmp2a,tmp1b,tmp2b; | |
| 1637 tmp1a = ( in[2*1+0] - in[2*5+0] - in[2*7+0] ) * c[3]; | |
| 1638 tmp1b = ( in[2*1+1] - in[2*5+1] - in[2*7+1] ) * c[3]; | |
| 1639 tmp2a = ( in[2*2+0] - in[2*4+0] - in[2*8+0] ) * c[6] - in[2*6+0] + in[2*0+0]; | |
| 1640 tmp2b = ( in[2*2+1] - in[2*4+1] - in[2*8+1] ) * c[6] - in[2*6+1] + in[2*0+1]; | |
| 1641 | |
| 1642 MACRO1(1); | |
| 1643 MACRO2(7); | |
| 1644 } | |
| 1645 | |
| 1646 { | |
| 1647 real tmp1a,tmp2a,tmp1b,tmp2b; | |
| 1648 tmp1a = in[2*1+0] * c[5] - ta33 - in[2*5+0] * c[7] + in[2*7+0] * c[1]; | |
| 1649 tmp1b = in[2*1+1] * c[5] - tb33 - in[2*5+1] * c[7] + in[2*7+1] * c[1]; | |
| 1650 tmp2a = in[2*0+0] - in[2*2+0] * c[8] - in[2*4+0] * c[2] + ta66 + in[2*8+0] * c[4]; | |
| 1651 tmp2b = in[2*0+1] - in[2*2+1] * c[8] - in[2*4+1] * c[2] + tb66 + in[2*8+1] * c[4]; | |
| 1652 | |
| 1653 MACRO1(2); | |
| 1654 MACRO2(6); | |
| 1655 } | |
| 1656 | |
| 1657 { | |
| 1658 real tmp1a,tmp2a,tmp1b,tmp2b; | |
| 1659 tmp1a = in[2*1+0] * c[7] - ta33 + in[2*5+0] * c[1] - in[2*7+0] * c[5]; | |
| 1660 tmp1b = in[2*1+1] * c[7] - tb33 + in[2*5+1] * c[1] - in[2*7+1] * c[5]; | |
| 1661 tmp2a = in[2*0+0] - in[2*2+0] * c[4] + in[2*4+0] * c[8] + ta66 - in[2*8+0] * c[2]; | |
| 1662 tmp2b = in[2*0+1] - in[2*2+1] * c[4] + in[2*4+1] * c[8] + tb66 - in[2*8+1] * c[2]; | |
| 1663 | |
| 1664 MACRO1(3); | |
| 1665 MACRO2(5); | |
| 1666 } | |
| 1667 | |
| 1668 { | |
| 1669 real sum0,sum1; | |
| 1670 sum0 = in[2*0+0] - in[2*2+0] + in[2*4+0] - in[2*6+0] + in[2*8+0]; | |
| 1671 sum1 = (in[2*0+1] - in[2*2+1] + in[2*4+1] - in[2*6+1] + in[2*8+1] ) * tfcos36[4]; | |
| 1672 MACRO0(4); | |
| 1673 } | |
| 1674 } | |
| 1675 | |
| 1676 } | |
| 1677 } | |
| 1678 | |
| 1679 /* | |
| 1680 * new DCT12 | |
| 1681 */ | |
| 1682 static void dct12(real *in,real *rawout1,real *rawout2,register real *wi,register real *ts) | |
| 1683 { | |
| 1684 #define DCT12_PART1 \ | |
| 1685 in5 = in[5*3]; \ | |
| 1686 in5 += (in4 = in[4*3]); \ | |
| 1687 in4 += (in3 = in[3*3]); \ | |
| 1688 in3 += (in2 = in[2*3]); \ | |
| 1689 in2 += (in1 = in[1*3]); \ | |
| 1690 in1 += (in0 = in[0*3]); \ | |
| 1691 \ | |
| 1692 in5 += in3; in3 += in1; \ | |
| 1693 \ | |
| 1694 in2 *= COS6_1; \ | |
| 1695 in3 *= COS6_1; \ | |
| 1696 | |
| 1697 #define DCT12_PART2 \ | |
| 1698 in0 += in4 * COS6_2; \ | |
| 1699 \ | |
| 1700 in4 = in0 + in2; \ | |
| 1701 in0 -= in2; \ | |
| 1702 \ | |
| 1703 in1 += in5 * COS6_2; \ | |
| 1704 \ | |
| 1705 in5 = (in1 + in3) * tfcos12[0]; \ | |
| 1706 in1 = (in1 - in3) * tfcos12[2]; \ | |
| 1707 \ | |
| 1708 in3 = in4 + in5; \ | |
| 1709 in4 -= in5; \ | |
| 1710 \ | |
| 1711 in2 = in0 + in1; \ | |
| 1712 in0 -= in1; | |
| 1713 | |
| 1714 | |
| 1715 { | |
| 1716 real in0,in1,in2,in3,in4,in5; | |
| 1717 register real *out1 = rawout1; | |
| 1718 ts[SBLIMIT*0] = out1[0]; ts[SBLIMIT*1] = out1[1]; ts[SBLIMIT*2] = out1[2]; | |
| 1719 ts[SBLIMIT*3] = out1[3]; ts[SBLIMIT*4] = out1[4]; ts[SBLIMIT*5] = out1[5]; | |
| 1720 | |
| 1721 DCT12_PART1 | |
| 1722 | |
| 1723 { | |
| 1724 real tmp0,tmp1 = (in0 - in4); | |
| 1725 { | |
| 1726 real tmp2 = (in1 - in5) * tfcos12[1]; | |
| 1727 tmp0 = tmp1 + tmp2; | |
| 1728 tmp1 -= tmp2; | |
| 1729 } | |
| 1730 ts[(17-1)*SBLIMIT] = out1[17-1] + tmp0 * wi[11-1]; | |
| 1731 ts[(12+1)*SBLIMIT] = out1[12+1] + tmp0 * wi[6+1]; | |
| 1732 ts[(6 +1)*SBLIMIT] = out1[6 +1] + tmp1 * wi[1]; | |
| 1733 ts[(11-1)*SBLIMIT] = out1[11-1] + tmp1 * wi[5-1]; | |
| 1734 } | |
| 1735 | |
| 1736 DCT12_PART2 | |
| 1737 | |
| 1738 ts[(17-0)*SBLIMIT] = out1[17-0] + in2 * wi[11-0]; | |
| 1739 ts[(12+0)*SBLIMIT] = out1[12+0] + in2 * wi[6+0]; | |
| 1740 ts[(12+2)*SBLIMIT] = out1[12+2] + in3 * wi[6+2]; | |
| 1741 ts[(17-2)*SBLIMIT] = out1[17-2] + in3 * wi[11-2]; | |
| 1742 | |
| 1743 ts[(6+0)*SBLIMIT] = out1[6+0] + in0 * wi[0]; | |
| 1744 ts[(11-0)*SBLIMIT] = out1[11-0] + in0 * wi[5-0]; | |
| 1745 ts[(6+2)*SBLIMIT] = out1[6+2] + in4 * wi[2]; | |
| 1746 ts[(11-2)*SBLIMIT] = out1[11-2] + in4 * wi[5-2]; | |
| 1747 } | |
| 1748 | |
| 1749 in++; | |
| 1750 | |
| 1751 { | |
| 1752 real in0,in1,in2,in3,in4,in5; | |
| 1753 register real *out2 = rawout2; | |
| 1754 | |
| 1755 DCT12_PART1 | |
| 1756 | |
| 1757 { | |
| 1758 real tmp0,tmp1 = (in0 - in4); | |
| 1759 { | |
| 1760 real tmp2 = (in1 - in5) * tfcos12[1]; | |
| 1761 tmp0 = tmp1 + tmp2; | |
| 1762 tmp1 -= tmp2; | |
| 1763 } | |
| 1764 out2[5-1] = tmp0 * wi[11-1]; | |
| 1765 out2[0+1] = tmp0 * wi[6+1]; | |
| 1766 ts[(12+1)*SBLIMIT] += tmp1 * wi[1]; | |
| 1767 ts[(17-1)*SBLIMIT] += tmp1 * wi[5-1]; | |
| 1768 } | |
| 1769 | |
| 1770 DCT12_PART2 | |
| 1771 | |
| 1772 out2[5-0] = in2 * wi[11-0]; | |
| 1773 out2[0+0] = in2 * wi[6+0]; | |
| 1774 out2[0+2] = in3 * wi[6+2]; | |
| 1775 out2[5-2] = in3 * wi[11-2]; | |
| 1776 | |
| 1777 ts[(12+0)*SBLIMIT] += in0 * wi[0]; | |
| 1778 ts[(17-0)*SBLIMIT] += in0 * wi[5-0]; | |
| 1779 ts[(12+2)*SBLIMIT] += in4 * wi[2]; | |
| 1780 ts[(17-2)*SBLIMIT] += in4 * wi[5-2]; | |
| 1781 } | |
| 1782 | |
| 1783 in++; | |
| 1784 | |
| 1785 { | |
| 1786 real in0,in1,in2,in3,in4,in5; | |
| 1787 register real *out2 = rawout2; | |
| 1788 out2[12]=out2[13]=out2[14]=out2[15]=out2[16]=out2[17]=0.0; | |
| 1789 | |
| 1790 DCT12_PART1 | |
| 1791 | |
| 1792 { | |
| 1793 real tmp0,tmp1 = (in0 - in4); | |
| 1794 { | |
| 1795 real tmp2 = (in1 - in5) * tfcos12[1]; | |
| 1796 tmp0 = tmp1 + tmp2; | |
| 1797 tmp1 -= tmp2; | |
| 1798 } | |
| 1799 out2[11-1] = tmp0 * wi[11-1]; | |
| 1800 out2[6 +1] = tmp0 * wi[6+1]; | |
| 1801 out2[0+1] += tmp1 * wi[1]; | |
| 1802 out2[5-1] += tmp1 * wi[5-1]; | |
| 1803 } | |
| 1804 | |
| 1805 DCT12_PART2 | |
| 1806 | |
| 1807 out2[11-0] = in2 * wi[11-0]; | |
| 1808 out2[6 +0] = in2 * wi[6+0]; | |
| 1809 out2[6 +2] = in3 * wi[6+2]; | |
| 1810 out2[11-2] = in3 * wi[11-2]; | |
| 1811 | |
| 1812 out2[0+0] += in0 * wi[0]; | |
| 1813 out2[5-0] += in0 * wi[5-0]; | |
| 1814 out2[0+2] += in4 * wi[2]; | |
| 1815 out2[5-2] += in4 * wi[5-2]; | |
| 1816 } | |
| 1817 } | |
| 1818 | |
| 1819 /* | |
| 1820 * III_hybrid | |
| 1821 */ | |
| 1822 static void III_hybrid(real fsIn[SBLIMIT][SSLIMIT],real tsOut[SSLIMIT][SBLIMIT], | |
|
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1823 int ch,struct gr_info_s *gr_info,struct mpstr *mp) |
| 261 | 1824 { |
| 1825 real *tspnt = (real *) tsOut; | |
|
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1826 real (*block)[2][SBLIMIT*SSLIMIT] = mp->hybrid_block; |
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1827 int *blc = mp->hybrid_blc; |
| 261 | 1828 real *rawout1,*rawout2; |
| 1829 int bt; | |
| 1830 int sb = 0; | |
| 1831 | |
| 1832 { | |
| 1833 int b = blc[ch]; | |
| 1834 rawout1=block[b][ch]; | |
| 1835 b=-b+1; | |
| 1836 rawout2=block[b][ch]; | |
| 1837 blc[ch] = b; | |
| 1838 } | |
| 1839 | |
| 1840 | |
| 1841 if(gr_info->mixed_block_flag) { | |
| 1842 sb = 2; | |
| 1843 dct36(fsIn[0],rawout1,rawout2,win[0],tspnt); | |
| 1844 dct36(fsIn[1],rawout1+18,rawout2+18,win1[0],tspnt+1); | |
| 1845 rawout1 += 36; rawout2 += 36; tspnt += 2; | |
| 1846 } | |
| 1847 | |
| 1848 bt = gr_info->block_type; | |
| 1849 if(bt == 2) { | |
| 1850 for (; sb<gr_info->maxb; sb+=2,tspnt+=2,rawout1+=36,rawout2+=36) { | |
| 1851 dct12(fsIn[sb],rawout1,rawout2,win[2],tspnt); | |
| 1852 dct12(fsIn[sb+1],rawout1+18,rawout2+18,win1[2],tspnt+1); | |
| 1853 } | |
| 1854 } | |
| 1855 else { | |
| 1856 for (; sb<gr_info->maxb; sb+=2,tspnt+=2,rawout1+=36,rawout2+=36) { | |
| 1857 dct36(fsIn[sb],rawout1,rawout2,win[bt],tspnt); | |
| 1858 dct36(fsIn[sb+1],rawout1+18,rawout2+18,win1[bt],tspnt+1); | |
| 1859 } | |
| 1860 } | |
| 1861 | |
| 1862 for(;sb<SBLIMIT;sb++,tspnt++) { | |
| 1863 int i; | |
| 1864 for(i=0;i<SSLIMIT;i++) { | |
| 1865 tspnt[i*SBLIMIT] = *rawout1++; | |
| 1866 *rawout2++ = 0.0; | |
| 1867 } | |
| 1868 } | |
| 1869 } | |
| 1870 | |
| 1871 /* | |
| 1872 * main layer3 handler | |
| 1873 */ | |
|
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1874 int do_layer3(struct frame *fr,unsigned char *pcm_sample, |
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1875 int *pcm_point,struct mpstr *mp) |
| 261 | 1876 { |
| 1877 int gr, ch, ss,clip=0; | |
| 1878 int scalefacs[2][39]; /* max 39 for short[13][3] mode, mixed: 38, long: 22 */ | |
| 1879 struct III_sideinfo sideinfo; | |
| 1880 int stereo = fr->stereo; | |
| 1881 int single = fr->single; | |
| 1882 int ms_stereo,i_stereo; | |
| 1883 int sfreq = fr->sampling_frequency; | |
| 1884 int stereo1,granules; | |
| 1885 | |
| 1886 if(stereo == 1) { /* stream is mono */ | |
| 1887 stereo1 = 1; | |
| 1888 single = 0; | |
| 1889 } | |
| 1890 else if(single >= 0) /* stream is stereo, but force to mono */ | |
| 1891 stereo1 = 1; | |
| 1892 else | |
| 1893 stereo1 = 2; | |
| 1894 | |
| 1895 if(fr->mode == MPG_MD_JOINT_STEREO) { | |
| 1896 ms_stereo = fr->mode_ext & 0x2; | |
| 1897 i_stereo = fr->mode_ext & 0x1; | |
| 1898 } | |
| 1899 else | |
| 1900 ms_stereo = i_stereo = 0; | |
| 1901 | |
| 1902 if(fr->lsf) { | |
| 1903 granules = 1; | |
| 1904 if(!III_get_side_info_2(&sideinfo,stereo,ms_stereo,sfreq,single)) | |
| 1905 return -1; | |
| 1906 } | |
| 1907 else { | |
| 1908 granules = 2; | |
| 1909 #ifdef MPEG1 | |
| 1910 if(!III_get_side_info_1(&sideinfo,stereo,ms_stereo,sfreq,single)) | |
| 1911 return -1; | |
| 1912 #else | |
|
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1913 __Sound_SetError("MPGLIB: Not supported!"); |
| 261 | 1914 #endif |
| 1915 } | |
| 1916 | |
|
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1917 if(set_pointer(sideinfo.main_data_begin,mp) == MP3_ERR) |
| 261 | 1918 return -1; |
| 1919 | |
| 1920 for (gr=0;gr<granules;gr++) | |
| 1921 { | |
| 1922 real hybridIn[2][SBLIMIT][SSLIMIT]; | |
| 1923 real hybridOut[2][SSLIMIT][SBLIMIT]; | |
| 1924 | |
| 1925 { | |
| 1926 struct gr_info_s *gr_info = &(sideinfo.ch[0].gr[gr]); | |
| 1927 long part2bits; | |
| 1928 if(fr->lsf) | |
| 1929 part2bits = III_get_scale_factors_2(scalefacs[0],gr_info,0); | |
| 1930 else { | |
| 1931 #ifdef MPEG1 | |
| 1932 part2bits = III_get_scale_factors_1(scalefacs[0],gr_info); | |
| 1933 #else | |
|
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1934 __Sound_SetError("MPGLIB: Not supported!"); |
| 261 | 1935 #endif |
| 1936 } | |
| 1937 if(III_dequantize_sample(hybridIn[0], scalefacs[0],gr_info,sfreq,part2bits)) | |
| 1938 return clip; | |
| 1939 } | |
| 1940 if(stereo == 2) { | |
| 1941 struct gr_info_s *gr_info = &(sideinfo.ch[1].gr[gr]); | |
| 1942 long part2bits; | |
| 1943 if(fr->lsf) | |
| 1944 part2bits = III_get_scale_factors_2(scalefacs[1],gr_info,i_stereo); | |
| 1945 else { | |
| 1946 #ifdef MPEG1 | |
| 1947 part2bits = III_get_scale_factors_1(scalefacs[1],gr_info); | |
| 1948 #else | |
|
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1949 __Sound_SetError("MPGLIB: Not supported!"); |
| 261 | 1950 #endif |
| 1951 } | |
| 1952 | |
| 1953 if(III_dequantize_sample(hybridIn[1],scalefacs[1],gr_info,sfreq,part2bits)) | |
| 1954 return clip; | |
| 1955 | |
| 1956 if(ms_stereo) { | |
| 1957 int i; | |
| 1958 for(i=0;i<SBLIMIT*SSLIMIT;i++) { | |
| 1959 real tmp0,tmp1; | |
| 1960 tmp0 = ((real *) hybridIn[0])[i]; | |
| 1961 tmp1 = ((real *) hybridIn[1])[i]; | |
| 1962 ((real *) hybridIn[0])[i] = tmp0 + tmp1; | |
| 1963 ((real *) hybridIn[1])[i] = tmp0 - tmp1; | |
| 1964 } | |
| 1965 } | |
| 1966 | |
| 1967 if(i_stereo) | |
| 1968 III_i_stereo(hybridIn,scalefacs[1],gr_info,sfreq,ms_stereo,fr->lsf); | |
| 1969 | |
| 1970 if(ms_stereo || i_stereo || (single == 3) ) { | |
| 1971 if(gr_info->maxb > sideinfo.ch[0].gr[gr].maxb) | |
| 1972 sideinfo.ch[0].gr[gr].maxb = gr_info->maxb; | |
| 1973 else | |
| 1974 gr_info->maxb = sideinfo.ch[0].gr[gr].maxb; | |
| 1975 } | |
| 1976 | |
| 1977 switch(single) { | |
| 1978 case 3: | |
| 1979 { | |
| 1980 register int i; | |
| 1981 register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1]; | |
| 1982 for(i=0;i<SSLIMIT*gr_info->maxb;i++,in0++) | |
| 1983 *in0 = (*in0 + *in1++); /* *0.5 done by pow-scale */ | |
| 1984 } | |
| 1985 break; | |
| 1986 case 1: | |
| 1987 { | |
| 1988 register int i; | |
| 1989 register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1]; | |
| 1990 for(i=0;i<SSLIMIT*gr_info->maxb;i++) | |
| 1991 *in0++ = *in1++; | |
| 1992 } | |
| 1993 break; | |
| 1994 } | |
| 1995 } | |
| 1996 | |
| 1997 for(ch=0;ch<stereo1;ch++) { | |
| 1998 struct gr_info_s *gr_info = &(sideinfo.ch[ch].gr[gr]); | |
| 1999 III_antialias(hybridIn[ch],gr_info); | |
|
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2000 III_hybrid(hybridIn[ch], hybridOut[ch], ch,gr_info,mp); |
| 261 | 2001 } |
| 2002 | |
| 2003 for(ss=0;ss<SSLIMIT;ss++) { | |
| 2004 if(single >= 0) { | |
|
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2005 clip += synth_1to1_mono(hybridOut[0][ss],pcm_sample,pcm_point,mp); |
| 261 | 2006 } |
| 2007 else { | |
| 2008 int p1 = *pcm_point; | |
|
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2009 clip += synth_1to1(hybridOut[0][ss],0,pcm_sample,&p1,mp); |
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2010 clip += synth_1to1(hybridOut[1][ss],1,pcm_sample,pcm_point,mp); |
| 261 | 2011 } |
| 2012 } | |
| 2013 } | |
| 2014 | |
| 2015 return clip; | |
| 2016 } | |
| 2017 | |
| 2018 |