Mercurial > SDL_sound_CoreAudio
annotate decoders/mpglib/layer3.c @ 298:c92c07e07636
Renamed from common.c.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Mon, 25 Mar 2002 20:51:32 +0000 |
| parents | ad4c8f34136a |
| children | 7b1df7526915 |
| 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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9e7f9e09ea0e
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parents:
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11 |
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9e7f9e09ea0e
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parents:
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12 #define __SDL_SOUND_INTERNAL__ |
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parents:
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13 #include "SDL_sound_internal.h" |
|
9e7f9e09ea0e
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parents:
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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) { | |
|
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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) { | |
|
274
9e7f9e09ea0e
Removed fprintf() calls. Replaced with SNDDBG() and Sound_SetError() calls.
Ryan C. Gordon <icculus@icculus.org>
parents:
261
diff
changeset
|
350 Sound_SetError("MPGLIB: Blocktype == 0 and window-switching == 1 not allowed."); |
| 261 | 351 return 0; |
| 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) { | |
|
274
9e7f9e09ea0e
Removed fprintf() calls. Replaced with SNDDBG() and Sound_SetError() calls.
Ryan C. Gordon <icculus@icculus.org>
parents:
261
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) { | |
|
274
9e7f9e09ea0e
Removed fprintf() calls. Replaced with SNDDBG() and Sound_SetError() calls.
Ryan C. Gordon <icculus@icculus.org>
parents:
261
diff
changeset
|
424 Sound_SetError("MPGLIB: Blocktype == 0 and window-switching == 1 not allowed."); |
| 261 | 425 return 0; |
| 426 } | |
| 427 /* region_count/start parameters are implicit in this case. */ | |
| 428 /* check this again! */ | |
| 429 if(gr_info->block_type == 2) | |
| 430 gr_info->region1start = 36>>1; | |
| 431 else if(sfreq == 8) | |
| 432 /* check this for 2.5 and sfreq=8 */ | |
| 433 gr_info->region1start = 108>>1; | |
| 434 else | |
| 435 gr_info->region1start = 54>>1; | |
| 436 gr_info->region2start = 576>>1; | |
| 437 } | |
| 438 else | |
| 439 { | |
| 440 int i,r0c,r1c; | |
| 441 for (i=0; i<3; i++) | |
| 442 gr_info->table_select[i] = getbits_fast(5); | |
| 443 r0c = getbits_fast(4); | |
| 444 r1c = getbits_fast(3); | |
| 445 gr_info->region1start = bandInfo[sfreq].longIdx[r0c+1] >> 1 ; | |
| 446 gr_info->region2start = bandInfo[sfreq].longIdx[r0c+1+r1c+1] >> 1; | |
| 447 gr_info->block_type = 0; | |
| 448 gr_info->mixed_block_flag = 0; | |
| 449 } | |
| 450 gr_info->scalefac_scale = get1bit(); | |
| 451 gr_info->count1table_select = get1bit(); | |
| 452 } | |
| 453 return !0; | |
| 454 } | |
| 455 | |
| 456 /* | |
| 457 * read scalefactors | |
| 458 */ | |
| 459 #ifdef MPEG1 | |
| 460 static int III_get_scale_factors_1(int *scf,struct gr_info_s *gr_info) | |
| 461 { | |
| 462 static const unsigned char slen[2][16] = { | |
| 463 {0, 0, 0, 0, 3, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4}, | |
| 464 {0, 1, 2, 3, 0, 1, 2, 3, 1, 2, 3, 1, 2, 3, 2, 3} | |
| 465 }; | |
| 466 int numbits; | |
| 467 int num0 = slen[0][gr_info->scalefac_compress]; | |
| 468 int num1 = slen[1][gr_info->scalefac_compress]; | |
| 469 | |
| 470 if (gr_info->block_type == 2) { | |
| 471 int i=18; | |
| 472 numbits = (num0 + num1) * 18; | |
| 473 | |
| 474 if (gr_info->mixed_block_flag) { | |
| 475 for (i=8;i;i--) | |
| 476 *scf++ = getbits_fast(num0); | |
| 477 i = 9; | |
| 478 numbits -= num0; /* num0 * 17 + num1 * 18 */ | |
| 479 } | |
| 480 | |
| 481 for (;i;i--) | |
| 482 *scf++ = getbits_fast(num0); | |
| 483 for (i = 18; i; i--) | |
| 484 *scf++ = getbits_fast(num1); | |
| 485 *scf++ = 0; *scf++ = 0; *scf++ = 0; /* short[13][0..2] = 0 */ | |
| 486 } | |
| 487 else { | |
| 488 int i; | |
| 489 int scfsi = gr_info->scfsi; | |
| 490 | |
| 491 if(scfsi < 0) { /* scfsi < 0 => granule == 0 */ | |
| 492 for(i=11;i;i--) | |
| 493 *scf++ = getbits_fast(num0); | |
| 494 for(i=10;i;i--) | |
| 495 *scf++ = getbits_fast(num1); | |
| 496 numbits = (num0 + num1) * 10 + num0; | |
| 497 *scf++ = 0; | |
| 498 } | |
| 499 else { | |
| 500 numbits = 0; | |
| 501 if(!(scfsi & 0x8)) { | |
| 502 for (i=0;i<6;i++) | |
| 503 *scf++ = getbits_fast(num0); | |
| 504 numbits += num0 * 6; | |
| 505 } | |
| 506 else { | |
| 507 scf += 6; | |
| 508 } | |
| 509 | |
| 510 if(!(scfsi & 0x4)) { | |
| 511 for (i=0;i<5;i++) | |
| 512 *scf++ = getbits_fast(num0); | |
| 513 numbits += num0 * 5; | |
| 514 } | |
| 515 else { | |
| 516 scf += 5; | |
| 517 } | |
| 518 | |
| 519 if(!(scfsi & 0x2)) { | |
| 520 for(i=0;i<5;i++) | |
| 521 *scf++ = getbits_fast(num1); | |
| 522 numbits += num1 * 5; | |
| 523 } | |
| 524 else { | |
| 525 scf += 5; | |
| 526 } | |
| 527 | |
| 528 if(!(scfsi & 0x1)) { | |
| 529 for (i=0;i<5;i++) | |
| 530 *scf++ = getbits_fast(num1); | |
| 531 numbits += num1 * 5; | |
| 532 } | |
| 533 else { | |
| 534 scf += 5; | |
| 535 } | |
| 536 *scf++ = 0; /* no l[21] in original sources */ | |
| 537 } | |
| 538 } | |
| 539 return numbits; | |
| 540 } | |
| 541 #endif | |
| 542 | |
| 543 | |
| 544 static int III_get_scale_factors_2(int *scf,struct gr_info_s *gr_info,int i_stereo) | |
| 545 { | |
| 546 unsigned char *pnt; | |
| 547 int i,j; | |
| 548 unsigned int slen; | |
| 549 int n = 0; | |
| 550 int numbits = 0; | |
| 551 | |
| 552 static unsigned char stab[3][6][4] = { | |
| 553 { { 6, 5, 5,5 } , { 6, 5, 7,3 } , { 11,10,0,0} , | |
| 554 { 7, 7, 7,0 } , { 6, 6, 6,3 } , { 8, 8,5,0} } , | |
| 555 { { 9, 9, 9,9 } , { 9, 9,12,6 } , { 18,18,0,0} , | |
| 556 {12,12,12,0 } , {12, 9, 9,6 } , { 15,12,9,0} } , | |
| 557 { { 6, 9, 9,9 } , { 6, 9,12,6 } , { 15,18,0,0} , | |
| 558 { 6,15,12,0 } , { 6,12, 9,6 } , { 6,18,9,0} } }; | |
| 559 | |
| 560 if(i_stereo) /* i_stereo AND second channel -> do_layer3() checks this */ | |
| 561 slen = i_slen2[gr_info->scalefac_compress>>1]; | |
| 562 else | |
| 563 slen = n_slen2[gr_info->scalefac_compress]; | |
| 564 | |
| 565 gr_info->preflag = (slen>>15) & 0x1; | |
| 566 | |
| 567 n = 0; | |
| 568 if( gr_info->block_type == 2 ) { | |
| 569 n++; | |
| 570 if(gr_info->mixed_block_flag) | |
| 571 n++; | |
| 572 } | |
| 573 | |
| 574 pnt = stab[n][(slen>>12)&0x7]; | |
| 575 | |
| 576 for(i=0;i<4;i++) { | |
| 577 int num = slen & 0x7; | |
| 578 slen >>= 3; | |
| 579 if(num) { | |
| 580 for(j=0;j<(int)(pnt[i]);j++) | |
| 581 *scf++ = getbits_fast(num); | |
| 582 numbits += pnt[i] * num; | |
| 583 } | |
| 584 else { | |
| 585 for(j=0;j<(int)(pnt[i]);j++) | |
| 586 *scf++ = 0; | |
| 587 } | |
| 588 } | |
| 589 | |
| 590 n = (n << 1) + 1; | |
| 591 for(i=0;i<n;i++) | |
| 592 *scf++ = 0; | |
| 593 | |
| 594 return numbits; | |
| 595 } | |
| 596 | |
| 597 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}; | |
| 598 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}; | |
| 599 | |
| 600 /* | |
| 601 * don't forget to apply the same changes to III_dequantize_sample_ms() !!! | |
| 602 */ | |
| 603 static int III_dequantize_sample(real xr[SBLIMIT][SSLIMIT],int *scf, | |
| 604 struct gr_info_s *gr_info,int sfreq,int part2bits) | |
| 605 { | |
| 606 int shift = 1 + gr_info->scalefac_scale; | |
| 607 real *xrpnt = (real *) xr; | |
| 608 int l[3],l3; | |
| 609 int part2remain = gr_info->part2_3_length - part2bits; | |
| 610 int *me; | |
| 611 | |
| 612 { | |
| 613 int bv = gr_info->big_values; | |
| 614 int region1 = gr_info->region1start; | |
| 615 int region2 = gr_info->region2start; | |
| 616 | |
| 617 l3 = ((576>>1)-bv)>>1; | |
| 618 /* | |
| 619 * we may lose the 'odd' bit here !! | |
| 620 * check this later again | |
| 621 */ | |
| 622 if(bv <= region1) { | |
| 623 l[0] = bv; l[1] = 0; l[2] = 0; | |
| 624 } | |
| 625 else { | |
| 626 l[0] = region1; | |
| 627 if(bv <= region2) { | |
| 628 l[1] = bv - l[0]; l[2] = 0; | |
| 629 } | |
| 630 else { | |
| 631 l[1] = region2 - l[0]; l[2] = bv - region2; | |
| 632 } | |
| 633 } | |
| 634 } | |
| 635 | |
| 636 if(gr_info->block_type == 2) { | |
| 637 /* | |
| 638 * decoding with short or mixed mode BandIndex table | |
| 639 */ | |
| 640 int i,max[4]; | |
| 641 int step=0,lwin=0,cb=0; | |
| 642 register real v = 0.0; | |
| 643 register int *m,mc; | |
| 644 | |
| 645 if(gr_info->mixed_block_flag) { | |
| 646 max[3] = -1; | |
| 647 max[0] = max[1] = max[2] = 2; | |
| 648 m = map[sfreq][0]; | |
| 649 me = mapend[sfreq][0]; | |
| 650 } | |
| 651 else { | |
| 652 max[0] = max[1] = max[2] = max[3] = -1; | |
| 653 /* max[3] not really needed in this case */ | |
| 654 m = map[sfreq][1]; | |
| 655 me = mapend[sfreq][1]; | |
| 656 } | |
| 657 | |
| 658 mc = 0; | |
| 659 for(i=0;i<2;i++) { | |
| 660 int lp = l[i]; | |
| 661 struct newhuff *h = ht+gr_info->table_select[i]; | |
| 662 for(;lp;lp--,mc--) { | |
| 663 register int x,y; | |
| 664 if( (!mc) ) { | |
| 665 mc = *m++; | |
| 666 xrpnt = ((real *) xr) + (*m++); | |
| 667 lwin = *m++; | |
| 668 cb = *m++; | |
| 669 if(lwin == 3) { | |
| 670 v = gr_info->pow2gain[(*scf++) << shift]; | |
| 671 step = 1; | |
| 672 } | |
| 673 else { | |
| 674 v = gr_info->full_gain[lwin][(*scf++) << shift]; | |
| 675 step = 3; | |
| 676 } | |
| 677 } | |
| 678 { | |
| 679 register short *val = h->table; | |
| 680 while((y=*val++)<0) { | |
| 681 if (get1bit()) | |
| 682 val -= y; | |
| 683 part2remain--; | |
| 684 } | |
| 685 x = y >> 4; | |
| 686 y &= 0xf; | |
| 687 } | |
| 688 if(x == 15) { | |
| 689 max[lwin] = cb; | |
| 690 part2remain -= h->linbits+1; | |
| 691 x += getbits(h->linbits); | |
| 692 if(get1bit()) | |
| 693 *xrpnt = -ispow[x] * v; | |
| 694 else | |
| 695 *xrpnt = ispow[x] * v; | |
| 696 } | |
| 697 else if(x) { | |
| 698 max[lwin] = cb; | |
| 699 if(get1bit()) | |
| 700 *xrpnt = -ispow[x] * v; | |
| 701 else | |
| 702 *xrpnt = ispow[x] * v; | |
| 703 part2remain--; | |
| 704 } | |
| 705 else | |
| 706 *xrpnt = 0.0; | |
| 707 xrpnt += step; | |
| 708 if(y == 15) { | |
| 709 max[lwin] = cb; | |
| 710 part2remain -= h->linbits+1; | |
| 711 y += getbits(h->linbits); | |
| 712 if(get1bit()) | |
| 713 *xrpnt = -ispow[y] * v; | |
| 714 else | |
| 715 *xrpnt = ispow[y] * v; | |
| 716 } | |
| 717 else if(y) { | |
| 718 max[lwin] = cb; | |
| 719 if(get1bit()) | |
| 720 *xrpnt = -ispow[y] * v; | |
| 721 else | |
| 722 *xrpnt = ispow[y] * v; | |
| 723 part2remain--; | |
| 724 } | |
| 725 else | |
| 726 *xrpnt = 0.0; | |
| 727 xrpnt += step; | |
| 728 } | |
| 729 } | |
| 730 for(;l3 && (part2remain > 0);l3--) { | |
| 731 struct newhuff *h = htc+gr_info->count1table_select; | |
| 732 register short *val = h->table,a; | |
| 733 | |
| 734 while((a=*val++)<0) { | |
| 735 part2remain--; | |
| 736 if(part2remain < 0) { | |
| 737 part2remain++; | |
| 738 a = 0; | |
| 739 break; | |
| 740 } | |
| 741 if (get1bit()) | |
| 742 val -= a; | |
| 743 } | |
| 744 | |
| 745 for(i=0;i<4;i++) { | |
| 746 if(!(i & 1)) { | |
| 747 if(!mc) { | |
| 748 mc = *m++; | |
| 749 xrpnt = ((real *) xr) + (*m++); | |
| 750 lwin = *m++; | |
| 751 cb = *m++; | |
| 752 if(lwin == 3) { | |
| 753 v = gr_info->pow2gain[(*scf++) << shift]; | |
| 754 step = 1; | |
| 755 } | |
| 756 else { | |
| 757 v = gr_info->full_gain[lwin][(*scf++) << shift]; | |
| 758 step = 3; | |
| 759 } | |
| 760 } | |
| 761 mc--; | |
| 762 } | |
| 763 if( (a & (0x8>>i)) ) { | |
| 764 max[lwin] = cb; | |
| 765 part2remain--; | |
| 766 if(part2remain < 0) { | |
| 767 part2remain++; | |
| 768 break; | |
| 769 } | |
| 770 if(get1bit()) | |
| 771 *xrpnt = -v; | |
| 772 else | |
| 773 *xrpnt = v; | |
| 774 } | |
| 775 else | |
| 776 *xrpnt = 0.0; | |
| 777 xrpnt += step; | |
| 778 } | |
| 779 } | |
| 780 | |
| 781 while( m < me ) { | |
| 782 if(!mc) { | |
| 783 mc = *m++; | |
| 784 xrpnt = ((real *) xr) + *m++; | |
| 785 if( (*m++) == 3) | |
| 786 step = 1; | |
| 787 else | |
| 788 step = 3; | |
| 789 m++; /* cb */ | |
| 790 } | |
| 791 mc--; | |
| 792 *xrpnt = 0.0; | |
| 793 xrpnt += step; | |
| 794 *xrpnt = 0.0; | |
| 795 xrpnt += step; | |
| 796 /* we could add a little opt. here: | |
| 797 * if we finished a band for window 3 or a long band | |
| 798 * further bands could copied in a simple loop without a | |
| 799 * special 'map' decoding | |
| 800 */ | |
| 801 } | |
| 802 | |
| 803 gr_info->maxband[0] = max[0]+1; | |
| 804 gr_info->maxband[1] = max[1]+1; | |
| 805 gr_info->maxband[2] = max[2]+1; | |
| 806 gr_info->maxbandl = max[3]+1; | |
| 807 | |
| 808 { | |
| 809 int rmax = max[0] > max[1] ? max[0] : max[1]; | |
| 810 rmax = (rmax > max[2] ? rmax : max[2]) + 1; | |
| 811 gr_info->maxb = rmax ? shortLimit[sfreq][rmax] : longLimit[sfreq][max[3]+1]; | |
| 812 } | |
| 813 | |
| 814 } | |
| 815 else { | |
| 816 /* | |
| 817 * decoding with 'long' BandIndex table (block_type != 2) | |
| 818 */ | |
| 819 int *pretab = gr_info->preflag ? pretab1 : pretab2; | |
| 820 int i,max = -1; | |
| 821 int cb = 0; | |
| 822 register int *m = map[sfreq][2]; | |
| 823 register real v = 0.0; | |
| 824 register int mc = 0; | |
| 825 #if 0 | |
| 826 me = mapend[sfreq][2]; | |
| 827 #endif | |
| 828 | |
| 829 /* | |
| 830 * long hash table values | |
| 831 */ | |
| 832 for(i=0;i<3;i++) { | |
| 833 int lp = l[i]; | |
| 834 struct newhuff *h = ht+gr_info->table_select[i]; | |
| 835 | |
| 836 for(;lp;lp--,mc--) { | |
| 837 int x,y; | |
| 838 | |
| 839 if(!mc) { | |
| 840 mc = *m++; | |
| 841 v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift]; | |
| 842 cb = *m++; | |
| 843 } | |
| 844 { | |
| 845 register short *val = h->table; | |
| 846 while((y=*val++)<0) { | |
| 847 if (get1bit()) | |
| 848 val -= y; | |
| 849 part2remain--; | |
| 850 } | |
| 851 x = y >> 4; | |
| 852 y &= 0xf; | |
| 853 } | |
| 854 if (x == 15) { | |
| 855 max = cb; | |
| 856 part2remain -= h->linbits+1; | |
| 857 x += getbits(h->linbits); | |
| 858 if(get1bit()) | |
| 859 *xrpnt++ = -ispow[x] * v; | |
| 860 else | |
| 861 *xrpnt++ = ispow[x] * v; | |
| 862 } | |
| 863 else if(x) { | |
| 864 max = cb; | |
| 865 if(get1bit()) | |
| 866 *xrpnt++ = -ispow[x] * v; | |
| 867 else | |
| 868 *xrpnt++ = ispow[x] * v; | |
| 869 part2remain--; | |
| 870 } | |
| 871 else | |
| 872 *xrpnt++ = 0.0; | |
| 873 | |
| 874 if (y == 15) { | |
| 875 max = cb; | |
| 876 part2remain -= h->linbits+1; | |
| 877 y += getbits(h->linbits); | |
| 878 if(get1bit()) | |
| 879 *xrpnt++ = -ispow[y] * v; | |
| 880 else | |
| 881 *xrpnt++ = ispow[y] * v; | |
| 882 } | |
| 883 else if(y) { | |
| 884 max = cb; | |
| 885 if(get1bit()) | |
| 886 *xrpnt++ = -ispow[y] * v; | |
| 887 else | |
| 888 *xrpnt++ = ispow[y] * v; | |
| 889 part2remain--; | |
| 890 } | |
| 891 else | |
| 892 *xrpnt++ = 0.0; | |
| 893 } | |
| 894 } | |
| 895 | |
| 896 /* | |
| 897 * short (count1table) values | |
| 898 */ | |
| 899 for(;l3 && (part2remain > 0);l3--) { | |
| 900 struct newhuff *h = htc+gr_info->count1table_select; | |
| 901 register short *val = h->table,a; | |
| 902 | |
| 903 while((a=*val++)<0) { | |
| 904 part2remain--; | |
| 905 if(part2remain < 0) { | |
| 906 part2remain++; | |
| 907 a = 0; | |
| 908 break; | |
| 909 } | |
| 910 if (get1bit()) | |
| 911 val -= a; | |
| 912 } | |
| 913 | |
| 914 for(i=0;i<4;i++) { | |
| 915 if(!(i & 1)) { | |
| 916 if(!mc) { | |
| 917 mc = *m++; | |
| 918 cb = *m++; | |
| 919 v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift]; | |
| 920 } | |
| 921 mc--; | |
| 922 } | |
| 923 if ( (a & (0x8>>i)) ) { | |
| 924 max = cb; | |
| 925 part2remain--; | |
| 926 if(part2remain < 0) { | |
| 927 part2remain++; | |
| 928 break; | |
| 929 } | |
| 930 if(get1bit()) | |
| 931 *xrpnt++ = -v; | |
| 932 else | |
| 933 *xrpnt++ = v; | |
| 934 } | |
| 935 else | |
| 936 *xrpnt++ = 0.0; | |
| 937 } | |
| 938 } | |
| 939 | |
| 940 /* | |
| 941 * zero part | |
| 942 */ | |
| 943 for(i=(&xr[SBLIMIT][0]-xrpnt)>>1;i;i--) { | |
| 944 *xrpnt++ = 0.0; | |
| 945 *xrpnt++ = 0.0; | |
| 946 } | |
| 947 | |
| 948 gr_info->maxbandl = max+1; | |
| 949 gr_info->maxb = longLimit[sfreq][gr_info->maxbandl]; | |
| 950 } | |
| 951 | |
| 952 while( part2remain > 16 ) { | |
| 953 getbits(16); /* Dismiss stuffing Bits */ | |
| 954 part2remain -= 16; | |
| 955 } | |
| 956 if(part2remain > 0) | |
| 957 getbits(part2remain); | |
| 958 else if(part2remain < 0) { | |
|
274
9e7f9e09ea0e
Removed fprintf() calls. Replaced with SNDDBG() and Sound_SetError() calls.
Ryan C. Gordon <icculus@icculus.org>
parents:
261
diff
changeset
|
959 Sound_SetError("MPGLIB: Can't rewind stream!"); /* !!! FIXME: Need formatting: by %d bits!\n",-part2remain);*/ |
| 261 | 960 return 1; /* -> error */ |
| 961 } | |
| 962 return 0; | |
| 963 } | |
| 964 | |
| 965 #if 0 | |
| 966 static int III_dequantize_sample_ms(real xr[2][SBLIMIT][SSLIMIT],int *scf, | |
| 967 struct gr_info_s *gr_info,int sfreq,int part2bits) | |
| 968 { | |
| 969 int shift = 1 + gr_info->scalefac_scale; | |
| 970 real *xrpnt = (real *) xr[1]; | |
| 971 real *xr0pnt = (real *) xr[0]; | |
| 972 int l[3],l3; | |
| 973 int part2remain = gr_info->part2_3_length - part2bits; | |
| 974 int *me; | |
| 975 | |
| 976 { | |
| 977 int bv = gr_info->big_values; | |
| 978 int region1 = gr_info->region1start; | |
| 979 int region2 = gr_info->region2start; | |
| 980 | |
| 981 l3 = ((576>>1)-bv)>>1; | |
| 982 /* | |
| 983 * we may lose the 'odd' bit here !! | |
| 984 * check this later gain | |
| 985 */ | |
| 986 if(bv <= region1) { | |
| 987 l[0] = bv; l[1] = 0; l[2] = 0; | |
| 988 } | |
| 989 else { | |
| 990 l[0] = region1; | |
| 991 if(bv <= region2) { | |
| 992 l[1] = bv - l[0]; l[2] = 0; | |
| 993 } | |
| 994 else { | |
| 995 l[1] = region2 - l[0]; l[2] = bv - region2; | |
| 996 } | |
| 997 } | |
| 998 } | |
| 999 | |
| 1000 if(gr_info->block_type == 2) { | |
| 1001 int i,max[4]; | |
| 1002 int step=0,lwin=0,cb=0; | |
| 1003 register real v = 0.0; | |
| 1004 register int *m,mc = 0; | |
| 1005 | |
| 1006 if(gr_info->mixed_block_flag) { | |
| 1007 max[3] = -1; | |
| 1008 max[0] = max[1] = max[2] = 2; | |
| 1009 m = map[sfreq][0]; | |
| 1010 me = mapend[sfreq][0]; | |
| 1011 } | |
| 1012 else { | |
| 1013 max[0] = max[1] = max[2] = max[3] = -1; | |
| 1014 /* max[3] not really needed in this case */ | |
| 1015 m = map[sfreq][1]; | |
| 1016 me = mapend[sfreq][1]; | |
| 1017 } | |
| 1018 | |
| 1019 for(i=0;i<2;i++) { | |
| 1020 int lp = l[i]; | |
| 1021 struct newhuff *h = ht+gr_info->table_select[i]; | |
| 1022 for(;lp;lp--,mc--) { | |
| 1023 int x,y; | |
| 1024 | |
| 1025 if(!mc) { | |
| 1026 mc = *m++; | |
| 1027 xrpnt = ((real *) xr[1]) + *m; | |
| 1028 xr0pnt = ((real *) xr[0]) + *m++; | |
| 1029 lwin = *m++; | |
| 1030 cb = *m++; | |
| 1031 if(lwin == 3) { | |
| 1032 v = gr_info->pow2gain[(*scf++) << shift]; | |
| 1033 step = 1; | |
| 1034 } | |
| 1035 else { | |
| 1036 v = gr_info->full_gain[lwin][(*scf++) << shift]; | |
| 1037 step = 3; | |
| 1038 } | |
| 1039 } | |
| 1040 { | |
| 1041 register short *val = h->table; | |
| 1042 while((y=*val++)<0) { | |
| 1043 if (get1bit()) | |
| 1044 val -= y; | |
| 1045 part2remain--; | |
| 1046 } | |
| 1047 x = y >> 4; | |
| 1048 y &= 0xf; | |
| 1049 } | |
| 1050 if(x == 15) { | |
| 1051 max[lwin] = cb; | |
| 1052 part2remain -= h->linbits+1; | |
| 1053 x += getbits(h->linbits); | |
| 1054 if(get1bit()) { | |
| 1055 real a = ispow[x] * v; | |
| 1056 *xrpnt = *xr0pnt + a; | |
| 1057 *xr0pnt -= a; | |
| 1058 } | |
| 1059 else { | |
| 1060 real a = ispow[x] * v; | |
| 1061 *xrpnt = *xr0pnt - a; | |
| 1062 *xr0pnt += a; | |
| 1063 } | |
| 1064 } | |
| 1065 else if(x) { | |
| 1066 max[lwin] = cb; | |
| 1067 if(get1bit()) { | |
| 1068 real a = ispow[x] * v; | |
| 1069 *xrpnt = *xr0pnt + a; | |
| 1070 *xr0pnt -= a; | |
| 1071 } | |
| 1072 else { | |
| 1073 real a = ispow[x] * v; | |
| 1074 *xrpnt = *xr0pnt - a; | |
| 1075 *xr0pnt += a; | |
| 1076 } | |
| 1077 part2remain--; | |
| 1078 } | |
| 1079 else | |
| 1080 *xrpnt = *xr0pnt; | |
| 1081 xrpnt += step; | |
| 1082 xr0pnt += step; | |
| 1083 | |
| 1084 if(y == 15) { | |
| 1085 max[lwin] = cb; | |
| 1086 part2remain -= h->linbits+1; | |
| 1087 y += getbits(h->linbits); | |
| 1088 if(get1bit()) { | |
| 1089 real a = ispow[y] * v; | |
| 1090 *xrpnt = *xr0pnt + a; | |
| 1091 *xr0pnt -= a; | |
| 1092 } | |
| 1093 else { | |
| 1094 real a = ispow[y] * v; | |
| 1095 *xrpnt = *xr0pnt - a; | |
| 1096 *xr0pnt += a; | |
| 1097 } | |
| 1098 } | |
| 1099 else if(y) { | |
| 1100 max[lwin] = cb; | |
| 1101 if(get1bit()) { | |
| 1102 real a = ispow[y] * v; | |
| 1103 *xrpnt = *xr0pnt + a; | |
| 1104 *xr0pnt -= a; | |
| 1105 } | |
| 1106 else { | |
| 1107 real a = ispow[y] * v; | |
| 1108 *xrpnt = *xr0pnt - a; | |
| 1109 *xr0pnt += a; | |
| 1110 } | |
| 1111 part2remain--; | |
| 1112 } | |
| 1113 else | |
| 1114 *xrpnt = *xr0pnt; | |
| 1115 xrpnt += step; | |
| 1116 xr0pnt += step; | |
| 1117 } | |
| 1118 } | |
| 1119 | |
| 1120 for(;l3 && (part2remain > 0);l3--) { | |
| 1121 struct newhuff *h = htc+gr_info->count1table_select; | |
| 1122 register short *val = h->table,a; | |
| 1123 | |
| 1124 while((a=*val++)<0) { | |
| 1125 part2remain--; | |
| 1126 if(part2remain < 0) { | |
| 1127 part2remain++; | |
| 1128 a = 0; | |
| 1129 break; | |
| 1130 } | |
| 1131 if (get1bit()) | |
| 1132 val -= a; | |
| 1133 } | |
| 1134 | |
| 1135 for(i=0;i<4;i++) { | |
| 1136 if(!(i & 1)) { | |
| 1137 if(!mc) { | |
| 1138 mc = *m++; | |
| 1139 xrpnt = ((real *) xr[1]) + *m; | |
| 1140 xr0pnt = ((real *) xr[0]) + *m++; | |
| 1141 lwin = *m++; | |
| 1142 cb = *m++; | |
| 1143 if(lwin == 3) { | |
| 1144 v = gr_info->pow2gain[(*scf++) << shift]; | |
| 1145 step = 1; | |
| 1146 } | |
| 1147 else { | |
| 1148 v = gr_info->full_gain[lwin][(*scf++) << shift]; | |
| 1149 step = 3; | |
| 1150 } | |
| 1151 } | |
| 1152 mc--; | |
| 1153 } | |
| 1154 if( (a & (0x8>>i)) ) { | |
| 1155 max[lwin] = cb; | |
| 1156 part2remain--; | |
| 1157 if(part2remain < 0) { | |
| 1158 part2remain++; | |
| 1159 break; | |
| 1160 } | |
| 1161 if(get1bit()) { | |
| 1162 *xrpnt = *xr0pnt + v; | |
| 1163 *xr0pnt -= v; | |
| 1164 } | |
| 1165 else { | |
| 1166 *xrpnt = *xr0pnt - v; | |
| 1167 *xr0pnt += v; | |
| 1168 } | |
| 1169 } | |
| 1170 else | |
| 1171 *xrpnt = *xr0pnt; | |
| 1172 xrpnt += step; | |
| 1173 xr0pnt += step; | |
| 1174 } | |
| 1175 } | |
| 1176 | |
| 1177 while( m < me ) { | |
| 1178 if(!mc) { | |
| 1179 mc = *m++; | |
| 1180 xrpnt = ((real *) xr[1]) + *m; | |
| 1181 xr0pnt = ((real *) xr[0]) + *m++; | |
| 1182 if(*m++ == 3) | |
| 1183 step = 1; | |
| 1184 else | |
| 1185 step = 3; | |
| 1186 m++; /* cb */ | |
| 1187 } | |
| 1188 mc--; | |
| 1189 *xrpnt = *xr0pnt; | |
| 1190 xrpnt += step; | |
| 1191 xr0pnt += step; | |
| 1192 *xrpnt = *xr0pnt; | |
| 1193 xrpnt += step; | |
| 1194 xr0pnt += step; | |
| 1195 /* we could add a little opt. here: | |
| 1196 * if we finished a band for window 3 or a long band | |
| 1197 * further bands could copied in a simple loop without a | |
| 1198 * special 'map' decoding | |
| 1199 */ | |
| 1200 } | |
| 1201 | |
| 1202 gr_info->maxband[0] = max[0]+1; | |
| 1203 gr_info->maxband[1] = max[1]+1; | |
| 1204 gr_info->maxband[2] = max[2]+1; | |
| 1205 gr_info->maxbandl = max[3]+1; | |
| 1206 | |
| 1207 { | |
| 1208 int rmax = max[0] > max[1] ? max[0] : max[1]; | |
| 1209 rmax = (rmax > max[2] ? rmax : max[2]) + 1; | |
| 1210 gr_info->maxb = rmax ? shortLimit[sfreq][rmax] : longLimit[sfreq][max[3]+1]; | |
| 1211 } | |
| 1212 } | |
| 1213 else { | |
| 1214 int *pretab = gr_info->preflag ? pretab1 : pretab2; | |
| 1215 int i,max = -1; | |
| 1216 int cb = 0; | |
| 1217 register int mc=0,*m = map[sfreq][2]; | |
| 1218 register real v = 0.0; | |
| 1219 #if 0 | |
| 1220 me = mapend[sfreq][2]; | |
| 1221 #endif | |
| 1222 | |
| 1223 for(i=0;i<3;i++) { | |
| 1224 int lp = l[i]; | |
| 1225 struct newhuff *h = ht+gr_info->table_select[i]; | |
| 1226 | |
| 1227 for(;lp;lp--,mc--) { | |
| 1228 int x,y; | |
| 1229 if(!mc) { | |
| 1230 mc = *m++; | |
| 1231 cb = *m++; | |
| 1232 v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift]; | |
| 1233 } | |
| 1234 { | |
| 1235 register short *val = h->table; | |
| 1236 while((y=*val++)<0) { | |
| 1237 if (get1bit()) | |
| 1238 val -= y; | |
| 1239 part2remain--; | |
| 1240 } | |
| 1241 x = y >> 4; | |
| 1242 y &= 0xf; | |
| 1243 } | |
| 1244 if (x == 15) { | |
| 1245 max = cb; | |
| 1246 part2remain -= h->linbits+1; | |
| 1247 x += getbits(h->linbits); | |
| 1248 if(get1bit()) { | |
| 1249 real a = ispow[x] * v; | |
| 1250 *xrpnt++ = *xr0pnt + a; | |
| 1251 *xr0pnt++ -= a; | |
| 1252 } | |
| 1253 else { | |
| 1254 real a = ispow[x] * v; | |
| 1255 *xrpnt++ = *xr0pnt - a; | |
| 1256 *xr0pnt++ += a; | |
| 1257 } | |
| 1258 } | |
| 1259 else if(x) { | |
| 1260 max = cb; | |
| 1261 if(get1bit()) { | |
| 1262 real a = ispow[x] * v; | |
| 1263 *xrpnt++ = *xr0pnt + a; | |
| 1264 *xr0pnt++ -= a; | |
| 1265 } | |
| 1266 else { | |
| 1267 real a = ispow[x] * v; | |
| 1268 *xrpnt++ = *xr0pnt - a; | |
| 1269 *xr0pnt++ += a; | |
| 1270 } | |
| 1271 part2remain--; | |
| 1272 } | |
| 1273 else | |
| 1274 *xrpnt++ = *xr0pnt++; | |
| 1275 | |
| 1276 if (y == 15) { | |
| 1277 max = cb; | |
| 1278 part2remain -= h->linbits+1; | |
| 1279 y += getbits(h->linbits); | |
| 1280 if(get1bit()) { | |
| 1281 real a = ispow[y] * v; | |
| 1282 *xrpnt++ = *xr0pnt + a; | |
| 1283 *xr0pnt++ -= a; | |
| 1284 } | |
| 1285 else { | |
| 1286 real a = ispow[y] * v; | |
| 1287 *xrpnt++ = *xr0pnt - a; | |
| 1288 *xr0pnt++ += a; | |
| 1289 } | |
| 1290 } | |
| 1291 else if(y) { | |
| 1292 max = cb; | |
| 1293 if(get1bit()) { | |
| 1294 real a = ispow[y] * v; | |
| 1295 *xrpnt++ = *xr0pnt + a; | |
| 1296 *xr0pnt++ -= a; | |
| 1297 } | |
| 1298 else { | |
| 1299 real a = ispow[y] * v; | |
| 1300 *xrpnt++ = *xr0pnt - a; | |
| 1301 *xr0pnt++ += a; | |
| 1302 } | |
| 1303 part2remain--; | |
| 1304 } | |
| 1305 else | |
| 1306 *xrpnt++ = *xr0pnt++; | |
| 1307 } | |
| 1308 } | |
| 1309 | |
| 1310 for(;l3 && (part2remain > 0);l3--) { | |
| 1311 struct newhuff *h = htc+gr_info->count1table_select; | |
| 1312 register short *val = h->table,a; | |
| 1313 | |
| 1314 while((a=*val++)<0) { | |
| 1315 part2remain--; | |
| 1316 if(part2remain < 0) { | |
| 1317 part2remain++; | |
| 1318 a = 0; | |
| 1319 break; | |
| 1320 } | |
| 1321 if (get1bit()) | |
| 1322 val -= a; | |
| 1323 } | |
| 1324 | |
| 1325 for(i=0;i<4;i++) { | |
| 1326 if(!(i & 1)) { | |
| 1327 if(!mc) { | |
| 1328 mc = *m++; | |
| 1329 cb = *m++; | |
| 1330 v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift]; | |
| 1331 } | |
| 1332 mc--; | |
| 1333 } | |
| 1334 if ( (a & (0x8>>i)) ) { | |
| 1335 max = cb; | |
| 1336 part2remain--; | |
| 1337 if(part2remain <= 0) { | |
| 1338 part2remain++; | |
| 1339 break; | |
| 1340 } | |
| 1341 if(get1bit()) { | |
| 1342 *xrpnt++ = *xr0pnt + v; | |
| 1343 *xr0pnt++ -= v; | |
| 1344 } | |
| 1345 else { | |
| 1346 *xrpnt++ = *xr0pnt - v; | |
| 1347 *xr0pnt++ += v; | |
| 1348 } | |
| 1349 } | |
| 1350 else | |
| 1351 *xrpnt++ = *xr0pnt++; | |
| 1352 } | |
| 1353 } | |
| 1354 for(i=(&xr[1][SBLIMIT][0]-xrpnt)>>1;i;i--) { | |
| 1355 *xrpnt++ = *xr0pnt++; | |
| 1356 *xrpnt++ = *xr0pnt++; | |
| 1357 } | |
| 1358 | |
| 1359 gr_info->maxbandl = max+1; | |
| 1360 gr_info->maxb = longLimit[sfreq][gr_info->maxbandl]; | |
| 1361 } | |
| 1362 | |
| 1363 while ( part2remain > 16 ) { | |
| 1364 getbits(16); /* Dismiss stuffing Bits */ | |
| 1365 part2remain -= 16; | |
| 1366 } | |
| 1367 if(part2remain > 0 ) | |
| 1368 getbits(part2remain); | |
| 1369 else if(part2remain < 0) { | |
|
274
9e7f9e09ea0e
Removed fprintf() calls. Replaced with SNDDBG() and Sound_SetError() calls.
Ryan C. Gordon <icculus@icculus.org>
parents:
261
diff
changeset
|
1370 Sound_SetError("MPGLIB: Can't rewind stream!"); /* !!! FIXME: Need formatting: by %d bits!\n",-part2remain); */ |
| 261 | 1371 return 1; /* -> error */ |
| 1372 } | |
| 1373 return 0; | |
| 1374 } | |
| 1375 #endif | |
| 1376 | |
| 1377 /* | |
| 1378 * III_stereo: calculate real channel values for Joint-I-Stereo-mode | |
| 1379 */ | |
| 1380 static void III_i_stereo(real xr_buf[2][SBLIMIT][SSLIMIT],int *scalefac, | |
| 1381 struct gr_info_s *gr_info,int sfreq,int ms_stereo,int lsf) | |
| 1382 { | |
| 1383 real (*xr)[SBLIMIT*SSLIMIT] = (real (*)[SBLIMIT*SSLIMIT] ) xr_buf; | |
| 1384 struct bandInfoStruct *bi = &bandInfo[sfreq]; | |
| 1385 real *tab1,*tab2; | |
| 1386 | |
| 1387 if(lsf) { | |
| 1388 int p = gr_info->scalefac_compress & 0x1; | |
| 1389 if(ms_stereo) { | |
| 1390 tab1 = pow1_2[p]; tab2 = pow2_2[p]; | |
| 1391 } | |
| 1392 else { | |
| 1393 tab1 = pow1_1[p]; tab2 = pow2_1[p]; | |
| 1394 } | |
| 1395 } | |
| 1396 else { | |
| 1397 if(ms_stereo) { | |
| 1398 tab1 = tan1_2; tab2 = tan2_2; | |
| 1399 } | |
| 1400 else { | |
| 1401 tab1 = tan1_1; tab2 = tan2_1; | |
| 1402 } | |
| 1403 } | |
| 1404 | |
| 1405 if (gr_info->block_type == 2) | |
| 1406 { | |
| 1407 int lwin,do_l = 0; | |
| 1408 if( gr_info->mixed_block_flag ) | |
| 1409 do_l = 1; | |
| 1410 | |
| 1411 for (lwin=0;lwin<3;lwin++) /* process each window */ | |
| 1412 { | |
| 1413 /* get first band with zero values */ | |
| 1414 int is_p,sb,idx,sfb = gr_info->maxband[lwin]; /* sfb is minimal 3 for mixed mode */ | |
| 1415 if(sfb > 3) | |
| 1416 do_l = 0; | |
| 1417 | |
| 1418 for(;sfb<12;sfb++) | |
| 1419 { | |
| 1420 is_p = scalefac[sfb*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */ | |
| 1421 if(is_p != 7) { | |
| 1422 real t1,t2; | |
| 1423 sb = bi->shortDiff[sfb]; | |
| 1424 idx = bi->shortIdx[sfb] + lwin; | |
| 1425 t1 = tab1[is_p]; t2 = tab2[is_p]; | |
| 1426 for (; sb > 0; sb--,idx+=3) | |
| 1427 { | |
| 1428 real v = xr[0][idx]; | |
| 1429 xr[0][idx] = v * t1; | |
| 1430 xr[1][idx] = v * t2; | |
| 1431 } | |
| 1432 } | |
| 1433 } | |
| 1434 | |
| 1435 #if 1 | |
| 1436 /* in the original: copy 10 to 11 , here: copy 11 to 12 | |
| 1437 maybe still wrong??? (copy 12 to 13?) */ | |
| 1438 is_p = scalefac[11*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */ | |
| 1439 sb = bi->shortDiff[12]; | |
| 1440 idx = bi->shortIdx[12] + lwin; | |
| 1441 #else | |
| 1442 is_p = scalefac[10*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */ | |
| 1443 sb = bi->shortDiff[11]; | |
| 1444 idx = bi->shortIdx[11] + lwin; | |
| 1445 #endif | |
| 1446 if(is_p != 7) | |
| 1447 { | |
| 1448 real t1,t2; | |
| 1449 t1 = tab1[is_p]; t2 = tab2[is_p]; | |
| 1450 for ( ; sb > 0; sb--,idx+=3 ) | |
| 1451 { | |
| 1452 real v = xr[0][idx]; | |
| 1453 xr[0][idx] = v * t1; | |
| 1454 xr[1][idx] = v * t2; | |
| 1455 } | |
| 1456 } | |
| 1457 } /* end for(lwin; .. ; . ) */ | |
| 1458 | |
| 1459 if (do_l) | |
| 1460 { | |
| 1461 /* also check l-part, if ALL bands in the three windows are 'empty' | |
| 1462 * and mode = mixed_mode | |
| 1463 */ | |
| 1464 int sfb = gr_info->maxbandl; | |
| 1465 int idx = bi->longIdx[sfb]; | |
| 1466 | |
| 1467 for ( ; sfb<8; sfb++ ) | |
| 1468 { | |
| 1469 int sb = bi->longDiff[sfb]; | |
| 1470 int is_p = scalefac[sfb]; /* scale: 0-15 */ | |
| 1471 if(is_p != 7) { | |
| 1472 real t1,t2; | |
| 1473 t1 = tab1[is_p]; t2 = tab2[is_p]; | |
| 1474 for ( ; sb > 0; sb--,idx++) | |
| 1475 { | |
| 1476 real v = xr[0][idx]; | |
| 1477 xr[0][idx] = v * t1; | |
| 1478 xr[1][idx] = v * t2; | |
| 1479 } | |
| 1480 } | |
| 1481 else | |
| 1482 idx += sb; | |
| 1483 } | |
| 1484 } | |
| 1485 } | |
| 1486 else /* ((gr_info->block_type != 2)) */ | |
| 1487 { | |
| 1488 int sfb = gr_info->maxbandl; | |
| 1489 int is_p,idx = bi->longIdx[sfb]; | |
| 1490 for ( ; sfb<21; sfb++) | |
| 1491 { | |
| 1492 int sb = bi->longDiff[sfb]; | |
| 1493 is_p = scalefac[sfb]; /* scale: 0-15 */ | |
| 1494 if(is_p != 7) { | |
| 1495 real t1,t2; | |
| 1496 t1 = tab1[is_p]; t2 = tab2[is_p]; | |
| 1497 for ( ; sb > 0; sb--,idx++) | |
| 1498 { | |
| 1499 real v = xr[0][idx]; | |
| 1500 xr[0][idx] = v * t1; | |
| 1501 xr[1][idx] = v * t2; | |
| 1502 } | |
| 1503 } | |
| 1504 else | |
| 1505 idx += sb; | |
| 1506 } | |
| 1507 | |
| 1508 is_p = scalefac[20]; /* copy l-band 20 to l-band 21 */ | |
| 1509 if(is_p != 7) | |
| 1510 { | |
| 1511 int sb; | |
| 1512 real t1 = tab1[is_p],t2 = tab2[is_p]; | |
| 1513 | |
| 1514 for ( sb = bi->longDiff[21]; sb > 0; sb--,idx++ ) | |
| 1515 { | |
| 1516 real v = xr[0][idx]; | |
| 1517 xr[0][idx] = v * t1; | |
| 1518 xr[1][idx] = v * t2; | |
| 1519 } | |
| 1520 } | |
| 1521 } /* ... */ | |
| 1522 } | |
| 1523 | |
| 1524 static void III_antialias(real xr[SBLIMIT][SSLIMIT],struct gr_info_s *gr_info) | |
| 1525 { | |
| 1526 int sblim; | |
| 1527 | |
| 1528 if(gr_info->block_type == 2) | |
| 1529 { | |
| 1530 if(!gr_info->mixed_block_flag) | |
| 1531 return; | |
| 1532 sblim = 1; | |
| 1533 } | |
| 1534 else { | |
| 1535 sblim = gr_info->maxb-1; | |
| 1536 } | |
| 1537 | |
| 1538 /* 31 alias-reduction operations between each pair of sub-bands */ | |
| 1539 /* with 8 butterflies between each pair */ | |
| 1540 | |
| 1541 { | |
| 1542 int sb; | |
| 1543 real *xr1=(real *) xr[1]; | |
| 1544 | |
| 1545 for(sb=sblim;sb;sb--,xr1+=10) | |
| 1546 { | |
| 1547 int ss; | |
| 1548 real *cs=aa_cs,*ca=aa_ca; | |
| 1549 real *xr2 = xr1; | |
| 1550 | |
| 1551 for(ss=7;ss>=0;ss--) | |
| 1552 { /* upper and lower butterfly inputs */ | |
| 1553 register real bu = *--xr2,bd = *xr1; | |
| 1554 *xr2 = (bu * (*cs) ) - (bd * (*ca) ); | |
| 1555 *xr1++ = (bd * (*cs++) ) + (bu * (*ca++) ); | |
| 1556 } | |
| 1557 } | |
| 1558 } | |
| 1559 } | |
| 1560 | |
| 1561 /* | |
| 1562 DCT insipired by Jeff Tsay's DCT from the maplay package | |
| 1563 this is an optimized version with manual unroll. | |
| 1564 | |
| 1565 References: | |
| 1566 [1] S. Winograd: "On Computing the Discrete Fourier Transform", | |
| 1567 Mathematics of Computation, Volume 32, Number 141, January 1978, | |
| 1568 Pages 175-199 | |
| 1569 */ | |
| 1570 | |
| 1571 static void dct36(real *inbuf,real *o1,real *o2,real *wintab,real *tsbuf) | |
| 1572 { | |
| 1573 { | |
| 1574 register real *in = inbuf; | |
| 1575 | |
| 1576 in[17]+=in[16]; in[16]+=in[15]; in[15]+=in[14]; | |
| 1577 in[14]+=in[13]; in[13]+=in[12]; in[12]+=in[11]; | |
| 1578 in[11]+=in[10]; in[10]+=in[9]; in[9] +=in[8]; | |
| 1579 in[8] +=in[7]; in[7] +=in[6]; in[6] +=in[5]; | |
| 1580 in[5] +=in[4]; in[4] +=in[3]; in[3] +=in[2]; | |
| 1581 in[2] +=in[1]; in[1] +=in[0]; | |
| 1582 | |
| 1583 in[17]+=in[15]; in[15]+=in[13]; in[13]+=in[11]; in[11]+=in[9]; | |
| 1584 in[9] +=in[7]; in[7] +=in[5]; in[5] +=in[3]; in[3] +=in[1]; | |
| 1585 | |
| 1586 | |
| 1587 { | |
| 1588 | |
| 1589 #define MACRO0(v) { \ | |
| 1590 real tmp; \ | |
| 1591 out2[9+(v)] = (tmp = sum0 + sum1) * w[27+(v)]; \ | |
| 1592 out2[8-(v)] = tmp * w[26-(v)]; } \ | |
| 1593 sum0 -= sum1; \ | |
| 1594 ts[SBLIMIT*(8-(v))] = out1[8-(v)] + sum0 * w[8-(v)]; \ | |
| 1595 ts[SBLIMIT*(9+(v))] = out1[9+(v)] + sum0 * w[9+(v)]; | |
| 1596 #define MACRO1(v) { \ | |
| 1597 real sum0,sum1; \ | |
| 1598 sum0 = tmp1a + tmp2a; \ | |
| 1599 sum1 = (tmp1b + tmp2b) * tfcos36[(v)]; \ | |
| 1600 MACRO0(v); } | |
| 1601 #define MACRO2(v) { \ | |
| 1602 real sum0,sum1; \ | |
| 1603 sum0 = tmp2a - tmp1a; \ | |
| 1604 sum1 = (tmp2b - tmp1b) * tfcos36[(v)]; \ | |
| 1605 MACRO0(v); } | |
| 1606 | |
| 1607 register const real *c = COS9; | |
| 1608 register real *out2 = o2; | |
| 1609 register real *w = wintab; | |
| 1610 register real *out1 = o1; | |
| 1611 register real *ts = tsbuf; | |
| 1612 | |
| 1613 real ta33,ta66,tb33,tb66; | |
| 1614 | |
| 1615 ta33 = in[2*3+0] * c[3]; | |
| 1616 ta66 = in[2*6+0] * c[6]; | |
| 1617 tb33 = in[2*3+1] * c[3]; | |
| 1618 tb66 = in[2*6+1] * c[6]; | |
| 1619 | |
| 1620 { | |
| 1621 real tmp1a,tmp2a,tmp1b,tmp2b; | |
| 1622 tmp1a = in[2*1+0] * c[1] + ta33 + in[2*5+0] * c[5] + in[2*7+0] * c[7]; | |
| 1623 tmp1b = in[2*1+1] * c[1] + tb33 + in[2*5+1] * c[5] + in[2*7+1] * c[7]; | |
| 1624 tmp2a = in[2*0+0] + in[2*2+0] * c[2] + in[2*4+0] * c[4] + ta66 + in[2*8+0] * c[8]; | |
| 1625 tmp2b = in[2*0+1] + in[2*2+1] * c[2] + in[2*4+1] * c[4] + tb66 + in[2*8+1] * c[8]; | |
| 1626 | |
| 1627 MACRO1(0); | |
| 1628 MACRO2(8); | |
| 1629 } | |
| 1630 | |
| 1631 { | |
| 1632 real tmp1a,tmp2a,tmp1b,tmp2b; | |
| 1633 tmp1a = ( in[2*1+0] - in[2*5+0] - in[2*7+0] ) * c[3]; | |
| 1634 tmp1b = ( in[2*1+1] - in[2*5+1] - in[2*7+1] ) * c[3]; | |
| 1635 tmp2a = ( in[2*2+0] - in[2*4+0] - in[2*8+0] ) * c[6] - in[2*6+0] + in[2*0+0]; | |
| 1636 tmp2b = ( in[2*2+1] - in[2*4+1] - in[2*8+1] ) * c[6] - in[2*6+1] + in[2*0+1]; | |
| 1637 | |
| 1638 MACRO1(1); | |
| 1639 MACRO2(7); | |
| 1640 } | |
| 1641 | |
| 1642 { | |
| 1643 real tmp1a,tmp2a,tmp1b,tmp2b; | |
| 1644 tmp1a = in[2*1+0] * c[5] - ta33 - in[2*5+0] * c[7] + in[2*7+0] * c[1]; | |
| 1645 tmp1b = in[2*1+1] * c[5] - tb33 - in[2*5+1] * c[7] + in[2*7+1] * c[1]; | |
| 1646 tmp2a = in[2*0+0] - in[2*2+0] * c[8] - in[2*4+0] * c[2] + ta66 + in[2*8+0] * c[4]; | |
| 1647 tmp2b = in[2*0+1] - in[2*2+1] * c[8] - in[2*4+1] * c[2] + tb66 + in[2*8+1] * c[4]; | |
| 1648 | |
| 1649 MACRO1(2); | |
| 1650 MACRO2(6); | |
| 1651 } | |
| 1652 | |
| 1653 { | |
| 1654 real tmp1a,tmp2a,tmp1b,tmp2b; | |
| 1655 tmp1a = in[2*1+0] * c[7] - ta33 + in[2*5+0] * c[1] - in[2*7+0] * c[5]; | |
| 1656 tmp1b = in[2*1+1] * c[7] - tb33 + in[2*5+1] * c[1] - in[2*7+1] * c[5]; | |
| 1657 tmp2a = in[2*0+0] - in[2*2+0] * c[4] + in[2*4+0] * c[8] + ta66 - in[2*8+0] * c[2]; | |
| 1658 tmp2b = in[2*0+1] - in[2*2+1] * c[4] + in[2*4+1] * c[8] + tb66 - in[2*8+1] * c[2]; | |
| 1659 | |
| 1660 MACRO1(3); | |
| 1661 MACRO2(5); | |
| 1662 } | |
| 1663 | |
| 1664 { | |
| 1665 real sum0,sum1; | |
| 1666 sum0 = in[2*0+0] - in[2*2+0] + in[2*4+0] - in[2*6+0] + in[2*8+0]; | |
| 1667 sum1 = (in[2*0+1] - in[2*2+1] + in[2*4+1] - in[2*6+1] + in[2*8+1] ) * tfcos36[4]; | |
| 1668 MACRO0(4); | |
| 1669 } | |
| 1670 } | |
| 1671 | |
| 1672 } | |
| 1673 } | |
| 1674 | |
| 1675 /* | |
| 1676 * new DCT12 | |
| 1677 */ | |
| 1678 static void dct12(real *in,real *rawout1,real *rawout2,register real *wi,register real *ts) | |
| 1679 { | |
| 1680 #define DCT12_PART1 \ | |
| 1681 in5 = in[5*3]; \ | |
| 1682 in5 += (in4 = in[4*3]); \ | |
| 1683 in4 += (in3 = in[3*3]); \ | |
| 1684 in3 += (in2 = in[2*3]); \ | |
| 1685 in2 += (in1 = in[1*3]); \ | |
| 1686 in1 += (in0 = in[0*3]); \ | |
| 1687 \ | |
| 1688 in5 += in3; in3 += in1; \ | |
| 1689 \ | |
| 1690 in2 *= COS6_1; \ | |
| 1691 in3 *= COS6_1; \ | |
| 1692 | |
| 1693 #define DCT12_PART2 \ | |
| 1694 in0 += in4 * COS6_2; \ | |
| 1695 \ | |
| 1696 in4 = in0 + in2; \ | |
| 1697 in0 -= in2; \ | |
| 1698 \ | |
| 1699 in1 += in5 * COS6_2; \ | |
| 1700 \ | |
| 1701 in5 = (in1 + in3) * tfcos12[0]; \ | |
| 1702 in1 = (in1 - in3) * tfcos12[2]; \ | |
| 1703 \ | |
| 1704 in3 = in4 + in5; \ | |
| 1705 in4 -= in5; \ | |
| 1706 \ | |
| 1707 in2 = in0 + in1; \ | |
| 1708 in0 -= in1; | |
| 1709 | |
| 1710 | |
| 1711 { | |
| 1712 real in0,in1,in2,in3,in4,in5; | |
| 1713 register real *out1 = rawout1; | |
| 1714 ts[SBLIMIT*0] = out1[0]; ts[SBLIMIT*1] = out1[1]; ts[SBLIMIT*2] = out1[2]; | |
| 1715 ts[SBLIMIT*3] = out1[3]; ts[SBLIMIT*4] = out1[4]; ts[SBLIMIT*5] = out1[5]; | |
| 1716 | |
| 1717 DCT12_PART1 | |
| 1718 | |
| 1719 { | |
| 1720 real tmp0,tmp1 = (in0 - in4); | |
| 1721 { | |
| 1722 real tmp2 = (in1 - in5) * tfcos12[1]; | |
| 1723 tmp0 = tmp1 + tmp2; | |
| 1724 tmp1 -= tmp2; | |
| 1725 } | |
| 1726 ts[(17-1)*SBLIMIT] = out1[17-1] + tmp0 * wi[11-1]; | |
| 1727 ts[(12+1)*SBLIMIT] = out1[12+1] + tmp0 * wi[6+1]; | |
| 1728 ts[(6 +1)*SBLIMIT] = out1[6 +1] + tmp1 * wi[1]; | |
| 1729 ts[(11-1)*SBLIMIT] = out1[11-1] + tmp1 * wi[5-1]; | |
| 1730 } | |
| 1731 | |
| 1732 DCT12_PART2 | |
| 1733 | |
| 1734 ts[(17-0)*SBLIMIT] = out1[17-0] + in2 * wi[11-0]; | |
| 1735 ts[(12+0)*SBLIMIT] = out1[12+0] + in2 * wi[6+0]; | |
| 1736 ts[(12+2)*SBLIMIT] = out1[12+2] + in3 * wi[6+2]; | |
| 1737 ts[(17-2)*SBLIMIT] = out1[17-2] + in3 * wi[11-2]; | |
| 1738 | |
| 1739 ts[(6+0)*SBLIMIT] = out1[6+0] + in0 * wi[0]; | |
| 1740 ts[(11-0)*SBLIMIT] = out1[11-0] + in0 * wi[5-0]; | |
| 1741 ts[(6+2)*SBLIMIT] = out1[6+2] + in4 * wi[2]; | |
| 1742 ts[(11-2)*SBLIMIT] = out1[11-2] + in4 * wi[5-2]; | |
| 1743 } | |
| 1744 | |
| 1745 in++; | |
| 1746 | |
| 1747 { | |
| 1748 real in0,in1,in2,in3,in4,in5; | |
| 1749 register real *out2 = rawout2; | |
| 1750 | |
| 1751 DCT12_PART1 | |
| 1752 | |
| 1753 { | |
| 1754 real tmp0,tmp1 = (in0 - in4); | |
| 1755 { | |
| 1756 real tmp2 = (in1 - in5) * tfcos12[1]; | |
| 1757 tmp0 = tmp1 + tmp2; | |
| 1758 tmp1 -= tmp2; | |
| 1759 } | |
| 1760 out2[5-1] = tmp0 * wi[11-1]; | |
| 1761 out2[0+1] = tmp0 * wi[6+1]; | |
| 1762 ts[(12+1)*SBLIMIT] += tmp1 * wi[1]; | |
| 1763 ts[(17-1)*SBLIMIT] += tmp1 * wi[5-1]; | |
| 1764 } | |
| 1765 | |
| 1766 DCT12_PART2 | |
| 1767 | |
| 1768 out2[5-0] = in2 * wi[11-0]; | |
| 1769 out2[0+0] = in2 * wi[6+0]; | |
| 1770 out2[0+2] = in3 * wi[6+2]; | |
| 1771 out2[5-2] = in3 * wi[11-2]; | |
| 1772 | |
| 1773 ts[(12+0)*SBLIMIT] += in0 * wi[0]; | |
| 1774 ts[(17-0)*SBLIMIT] += in0 * wi[5-0]; | |
| 1775 ts[(12+2)*SBLIMIT] += in4 * wi[2]; | |
| 1776 ts[(17-2)*SBLIMIT] += in4 * wi[5-2]; | |
| 1777 } | |
| 1778 | |
| 1779 in++; | |
| 1780 | |
| 1781 { | |
| 1782 real in0,in1,in2,in3,in4,in5; | |
| 1783 register real *out2 = rawout2; | |
| 1784 out2[12]=out2[13]=out2[14]=out2[15]=out2[16]=out2[17]=0.0; | |
| 1785 | |
| 1786 DCT12_PART1 | |
| 1787 | |
| 1788 { | |
| 1789 real tmp0,tmp1 = (in0 - in4); | |
| 1790 { | |
| 1791 real tmp2 = (in1 - in5) * tfcos12[1]; | |
| 1792 tmp0 = tmp1 + tmp2; | |
| 1793 tmp1 -= tmp2; | |
| 1794 } | |
| 1795 out2[11-1] = tmp0 * wi[11-1]; | |
| 1796 out2[6 +1] = tmp0 * wi[6+1]; | |
| 1797 out2[0+1] += tmp1 * wi[1]; | |
| 1798 out2[5-1] += tmp1 * wi[5-1]; | |
| 1799 } | |
| 1800 | |
| 1801 DCT12_PART2 | |
| 1802 | |
| 1803 out2[11-0] = in2 * wi[11-0]; | |
| 1804 out2[6 +0] = in2 * wi[6+0]; | |
| 1805 out2[6 +2] = in3 * wi[6+2]; | |
| 1806 out2[11-2] = in3 * wi[11-2]; | |
| 1807 | |
| 1808 out2[0+0] += in0 * wi[0]; | |
| 1809 out2[5-0] += in0 * wi[5-0]; | |
| 1810 out2[0+2] += in4 * wi[2]; | |
| 1811 out2[5-2] += in4 * wi[5-2]; | |
| 1812 } | |
| 1813 } | |
| 1814 | |
| 1815 /* | |
| 1816 * III_hybrid | |
| 1817 */ | |
| 1818 static void III_hybrid(real fsIn[SBLIMIT][SSLIMIT],real tsOut[SSLIMIT][SBLIMIT], | |
|
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1819 int ch,struct gr_info_s *gr_info,struct mpstr *mp) |
| 261 | 1820 { |
| 1821 real *tspnt = (real *) tsOut; | |
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1822 real (*block)[2][SBLIMIT*SSLIMIT] = mp->hybrid_block; |
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1823 int *blc = mp->hybrid_blc; |
| 261 | 1824 real *rawout1,*rawout2; |
| 1825 int bt; | |
| 1826 int sb = 0; | |
| 1827 | |
| 1828 { | |
| 1829 int b = blc[ch]; | |
| 1830 rawout1=block[b][ch]; | |
| 1831 b=-b+1; | |
| 1832 rawout2=block[b][ch]; | |
| 1833 blc[ch] = b; | |
| 1834 } | |
| 1835 | |
| 1836 | |
| 1837 if(gr_info->mixed_block_flag) { | |
| 1838 sb = 2; | |
| 1839 dct36(fsIn[0],rawout1,rawout2,win[0],tspnt); | |
| 1840 dct36(fsIn[1],rawout1+18,rawout2+18,win1[0],tspnt+1); | |
| 1841 rawout1 += 36; rawout2 += 36; tspnt += 2; | |
| 1842 } | |
| 1843 | |
| 1844 bt = gr_info->block_type; | |
| 1845 if(bt == 2) { | |
| 1846 for (; sb<gr_info->maxb; sb+=2,tspnt+=2,rawout1+=36,rawout2+=36) { | |
| 1847 dct12(fsIn[sb],rawout1,rawout2,win[2],tspnt); | |
| 1848 dct12(fsIn[sb+1],rawout1+18,rawout2+18,win1[2],tspnt+1); | |
| 1849 } | |
| 1850 } | |
| 1851 else { | |
| 1852 for (; sb<gr_info->maxb; sb+=2,tspnt+=2,rawout1+=36,rawout2+=36) { | |
| 1853 dct36(fsIn[sb],rawout1,rawout2,win[bt],tspnt); | |
| 1854 dct36(fsIn[sb+1],rawout1+18,rawout2+18,win1[bt],tspnt+1); | |
| 1855 } | |
| 1856 } | |
| 1857 | |
| 1858 for(;sb<SBLIMIT;sb++,tspnt++) { | |
| 1859 int i; | |
| 1860 for(i=0;i<SSLIMIT;i++) { | |
| 1861 tspnt[i*SBLIMIT] = *rawout1++; | |
| 1862 *rawout2++ = 0.0; | |
| 1863 } | |
| 1864 } | |
| 1865 } | |
| 1866 | |
| 1867 /* | |
| 1868 * main layer3 handler | |
| 1869 */ | |
|
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1870 int do_layer3(struct frame *fr,unsigned char *pcm_sample, |
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1871 int *pcm_point,struct mpstr *mp) |
| 261 | 1872 { |
| 1873 int gr, ch, ss,clip=0; | |
| 1874 int scalefacs[2][39]; /* max 39 for short[13][3] mode, mixed: 38, long: 22 */ | |
| 1875 struct III_sideinfo sideinfo; | |
| 1876 int stereo = fr->stereo; | |
| 1877 int single = fr->single; | |
| 1878 int ms_stereo,i_stereo; | |
| 1879 int sfreq = fr->sampling_frequency; | |
| 1880 int stereo1,granules; | |
| 1881 | |
| 1882 if(stereo == 1) { /* stream is mono */ | |
| 1883 stereo1 = 1; | |
| 1884 single = 0; | |
| 1885 } | |
| 1886 else if(single >= 0) /* stream is stereo, but force to mono */ | |
| 1887 stereo1 = 1; | |
| 1888 else | |
| 1889 stereo1 = 2; | |
| 1890 | |
| 1891 if(fr->mode == MPG_MD_JOINT_STEREO) { | |
| 1892 ms_stereo = fr->mode_ext & 0x2; | |
| 1893 i_stereo = fr->mode_ext & 0x1; | |
| 1894 } | |
| 1895 else | |
| 1896 ms_stereo = i_stereo = 0; | |
| 1897 | |
| 1898 if(fr->lsf) { | |
| 1899 granules = 1; | |
| 1900 if(!III_get_side_info_2(&sideinfo,stereo,ms_stereo,sfreq,single)) | |
| 1901 return -1; | |
| 1902 } | |
| 1903 else { | |
| 1904 granules = 2; | |
| 1905 #ifdef MPEG1 | |
| 1906 if(!III_get_side_info_1(&sideinfo,stereo,ms_stereo,sfreq,single)) | |
| 1907 return -1; | |
| 1908 #else | |
|
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1909 Sound_SetError("MPGLIB: Not supported!"); |
| 261 | 1910 #endif |
| 1911 } | |
| 1912 | |
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1913 if(set_pointer(sideinfo.main_data_begin,mp) == MP3_ERR) |
| 261 | 1914 return -1; |
| 1915 | |
| 1916 for (gr=0;gr<granules;gr++) | |
| 1917 { | |
| 1918 real hybridIn[2][SBLIMIT][SSLIMIT]; | |
| 1919 real hybridOut[2][SSLIMIT][SBLIMIT]; | |
| 1920 | |
| 1921 { | |
| 1922 struct gr_info_s *gr_info = &(sideinfo.ch[0].gr[gr]); | |
| 1923 long part2bits; | |
| 1924 if(fr->lsf) | |
| 1925 part2bits = III_get_scale_factors_2(scalefacs[0],gr_info,0); | |
| 1926 else { | |
| 1927 #ifdef MPEG1 | |
| 1928 part2bits = III_get_scale_factors_1(scalefacs[0],gr_info); | |
| 1929 #else | |
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1930 Sound_SetError("MPGLIB: Not supported!"); |
| 261 | 1931 #endif |
| 1932 } | |
| 1933 if(III_dequantize_sample(hybridIn[0], scalefacs[0],gr_info,sfreq,part2bits)) | |
| 1934 return clip; | |
| 1935 } | |
| 1936 if(stereo == 2) { | |
| 1937 struct gr_info_s *gr_info = &(sideinfo.ch[1].gr[gr]); | |
| 1938 long part2bits; | |
| 1939 if(fr->lsf) | |
| 1940 part2bits = III_get_scale_factors_2(scalefacs[1],gr_info,i_stereo); | |
| 1941 else { | |
| 1942 #ifdef MPEG1 | |
| 1943 part2bits = III_get_scale_factors_1(scalefacs[1],gr_info); | |
| 1944 #else | |
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1945 Sound_SetError("MPGLIB: Not supported!"); |
| 261 | 1946 #endif |
| 1947 } | |
| 1948 | |
| 1949 if(III_dequantize_sample(hybridIn[1],scalefacs[1],gr_info,sfreq,part2bits)) | |
| 1950 return clip; | |
| 1951 | |
| 1952 if(ms_stereo) { | |
| 1953 int i; | |
| 1954 for(i=0;i<SBLIMIT*SSLIMIT;i++) { | |
| 1955 real tmp0,tmp1; | |
| 1956 tmp0 = ((real *) hybridIn[0])[i]; | |
| 1957 tmp1 = ((real *) hybridIn[1])[i]; | |
| 1958 ((real *) hybridIn[0])[i] = tmp0 + tmp1; | |
| 1959 ((real *) hybridIn[1])[i] = tmp0 - tmp1; | |
| 1960 } | |
| 1961 } | |
| 1962 | |
| 1963 if(i_stereo) | |
| 1964 III_i_stereo(hybridIn,scalefacs[1],gr_info,sfreq,ms_stereo,fr->lsf); | |
| 1965 | |
| 1966 if(ms_stereo || i_stereo || (single == 3) ) { | |
| 1967 if(gr_info->maxb > sideinfo.ch[0].gr[gr].maxb) | |
| 1968 sideinfo.ch[0].gr[gr].maxb = gr_info->maxb; | |
| 1969 else | |
| 1970 gr_info->maxb = sideinfo.ch[0].gr[gr].maxb; | |
| 1971 } | |
| 1972 | |
| 1973 switch(single) { | |
| 1974 case 3: | |
| 1975 { | |
| 1976 register int i; | |
| 1977 register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1]; | |
| 1978 for(i=0;i<SSLIMIT*gr_info->maxb;i++,in0++) | |
| 1979 *in0 = (*in0 + *in1++); /* *0.5 done by pow-scale */ | |
| 1980 } | |
| 1981 break; | |
| 1982 case 1: | |
| 1983 { | |
| 1984 register int i; | |
| 1985 register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1]; | |
| 1986 for(i=0;i<SSLIMIT*gr_info->maxb;i++) | |
| 1987 *in0++ = *in1++; | |
| 1988 } | |
| 1989 break; | |
| 1990 } | |
| 1991 } | |
| 1992 | |
| 1993 for(ch=0;ch<stereo1;ch++) { | |
| 1994 struct gr_info_s *gr_info = &(sideinfo.ch[ch].gr[gr]); | |
| 1995 III_antialias(hybridIn[ch],gr_info); | |
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1996 III_hybrid(hybridIn[ch], hybridOut[ch], ch,gr_info,mp); |
| 261 | 1997 } |
| 1998 | |
| 1999 for(ss=0;ss<SSLIMIT;ss++) { | |
| 2000 if(single >= 0) { | |
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2001 clip += synth_1to1_mono(hybridOut[0][ss],pcm_sample,pcm_point,mp); |
| 261 | 2002 } |
| 2003 else { | |
| 2004 int p1 = *pcm_point; | |
|
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2005 clip += synth_1to1(hybridOut[0][ss],0,pcm_sample,&p1,mp); |
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parents:
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2006 clip += synth_1to1(hybridOut[1][ss],1,pcm_sample,pcm_point,mp); |
| 261 | 2007 } |
| 2008 } | |
| 2009 } | |
| 2010 | |
| 2011 return clip; | |
| 2012 } | |
| 2013 | |
| 2014 |