| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Copyright (c) 2001, 2002 Fabrice Bellard | ||
| 3 | * | ||
| 4 | * This file is part of FFmpeg. | ||
| 5 | * | ||
| 6 | * FFmpeg is free software; you can redistribute it and/or | ||
| 7 | * modify it under the terms of the GNU Lesser General Public | ||
| 8 | * License as published by the Free Software Foundation; either | ||
| 9 | * version 2.1 of the License, or (at your option) any later version. | ||
| 10 | * | ||
| 11 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 14 | * Lesser General Public License for more details. | ||
| 15 | * | ||
| 16 | * You should have received a copy of the GNU Lesser General Public | ||
| 17 | * License along with FFmpeg; if not, write to the Free Software | ||
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 19 | */ | ||
| 20 | |||
| 21 | #include <stdint.h> | ||
| 22 | |||
| 23 | #include "libavutil/attributes.h" | ||
| 24 | #include "libavutil/mem_internal.h" | ||
| 25 | #include "libavutil/thread.h" | ||
| 26 | |||
| 27 | #include "dct32.h" | ||
| 28 | #include "mathops.h" | ||
| 29 | #include "mpegaudiodsp.h" | ||
| 30 | #include "mpegaudio.h" | ||
| 31 | |||
| 32 | #if USE_FLOATS | ||
| 33 | #define RENAME(n) n##_float | ||
| 34 | |||
| 35 | 3058176 | static inline float round_sample(float *sum) | |
| 36 | { | ||
| 37 | 3058176 | float sum1=*sum; | |
| 38 | 3058176 | *sum = 0; | |
| 39 | 3058176 | return sum1; | |
| 40 | } | ||
| 41 | |||
| 42 | #define MACS(rt, ra, rb) rt+=(ra)*(rb) | ||
| 43 | #define MULS(ra, rb) ((ra)*(rb)) | ||
| 44 | #define MULH3(x, y, s) ((s)*(y)*(x)) | ||
| 45 | #define MLSS(rt, ra, rb) rt-=(ra)*(rb) | ||
| 46 | #define MULLx(x, y, s) ((y)*(x)) | ||
| 47 | #define FIXHR(x) ((float)(x)) | ||
| 48 | #define FIXR(x) ((float)(x)) | ||
| 49 | #define SHR(a,b) ((a)*(1.0f/(1<<(b)))) | ||
| 50 | |||
| 51 | #else | ||
| 52 | |||
| 53 | #define RENAME(n) n##_fixed | ||
| 54 | #define OUT_SHIFT (WFRAC_BITS + FRAC_BITS - 15) | ||
| 55 | |||
| 56 | 14113152 | static inline int round_sample(int64_t *sum) | |
| 57 | { | ||
| 58 | int sum1; | ||
| 59 | 14113152 | sum1 = (int)((*sum) >> OUT_SHIFT); | |
| 60 | 14113152 | *sum &= (1<<OUT_SHIFT)-1; | |
| 61 | 14113152 | return av_clip_int16(sum1); | |
| 62 | } | ||
| 63 | |||
| 64 | # define MULS(ra, rb) MUL64(ra, rb) | ||
| 65 | # define MACS(rt, ra, rb) MAC64(rt, ra, rb) | ||
| 66 | # define MLSS(rt, ra, rb) MLS64(rt, ra, rb) | ||
| 67 | # define MULH3(x, y, s) MULH((s)*(x), y) | ||
| 68 | # define MULLx(x, y, s) MULL((int)(x),(y),s) | ||
| 69 | # define SHR(a,b) (((int)(a))>>(b)) | ||
| 70 | # define FIXR(a) ((int)((a) * FRAC_ONE + 0.5)) | ||
| 71 | # define FIXHR(a) ((int)((a) * (1LL<<32) + 0.5)) | ||
| 72 | #endif | ||
| 73 | |||
| 74 | /** Window for MDCT. Actually only the elements in [0,17] and | ||
| 75 | [MDCT_BUF_SIZE/2, MDCT_BUF_SIZE/2 + 17] are actually used. The rest | ||
| 76 | is just to preserve alignment for SIMD implementations. | ||
| 77 | */ | ||
| 78 | DECLARE_ALIGNED(16, INTFLOAT, RENAME(ff_mdct_win))[8][MDCT_BUF_SIZE]; | ||
| 79 | |||
| 80 | DECLARE_ALIGNED(16, MPA_INT, RENAME(ff_mpa_synth_window))[512+256]; | ||
| 81 | |||
| 82 | #define SUM8(op, sum, w, p) \ | ||
| 83 | { \ | ||
| 84 | op(sum, (w)[0 * 64], (p)[0 * 64]); \ | ||
| 85 | op(sum, (w)[1 * 64], (p)[1 * 64]); \ | ||
| 86 | op(sum, (w)[2 * 64], (p)[2 * 64]); \ | ||
| 87 | op(sum, (w)[3 * 64], (p)[3 * 64]); \ | ||
| 88 | op(sum, (w)[4 * 64], (p)[4 * 64]); \ | ||
| 89 | op(sum, (w)[5 * 64], (p)[5 * 64]); \ | ||
| 90 | op(sum, (w)[6 * 64], (p)[6 * 64]); \ | ||
| 91 | op(sum, (w)[7 * 64], (p)[7 * 64]); \ | ||
| 92 | } | ||
| 93 | |||
| 94 | #define SUM8P2(sum1, op1, sum2, op2, w1, w2, p) \ | ||
| 95 | { \ | ||
| 96 | INTFLOAT tmp;\ | ||
| 97 | tmp = p[0 * 64];\ | ||
| 98 | op1(sum1, (w1)[0 * 64], tmp);\ | ||
| 99 | op2(sum2, (w2)[0 * 64], tmp);\ | ||
| 100 | tmp = p[1 * 64];\ | ||
| 101 | op1(sum1, (w1)[1 * 64], tmp);\ | ||
| 102 | op2(sum2, (w2)[1 * 64], tmp);\ | ||
| 103 | tmp = p[2 * 64];\ | ||
| 104 | op1(sum1, (w1)[2 * 64], tmp);\ | ||
| 105 | op2(sum2, (w2)[2 * 64], tmp);\ | ||
| 106 | tmp = p[3 * 64];\ | ||
| 107 | op1(sum1, (w1)[3 * 64], tmp);\ | ||
| 108 | op2(sum2, (w2)[3 * 64], tmp);\ | ||
| 109 | tmp = p[4 * 64];\ | ||
| 110 | op1(sum1, (w1)[4 * 64], tmp);\ | ||
| 111 | op2(sum2, (w2)[4 * 64], tmp);\ | ||
| 112 | tmp = p[5 * 64];\ | ||
| 113 | op1(sum1, (w1)[5 * 64], tmp);\ | ||
| 114 | op2(sum2, (w2)[5 * 64], tmp);\ | ||
| 115 | tmp = p[6 * 64];\ | ||
| 116 | op1(sum1, (w1)[6 * 64], tmp);\ | ||
| 117 | op2(sum2, (w2)[6 * 64], tmp);\ | ||
| 118 | tmp = p[7 * 64];\ | ||
| 119 | op1(sum1, (w1)[7 * 64], tmp);\ | ||
| 120 | op2(sum2, (w2)[7 * 64], tmp);\ | ||
| 121 | } | ||
| 122 | |||
| 123 | 536604 | void RENAME(ff_mpadsp_apply_window)(MPA_INT *synth_buf, MPA_INT *window, | |
| 124 | int *dither_state, OUT_INT *samples, | ||
| 125 | ptrdiff_t incr) | ||
| 126 | { | ||
| 127 | register const MPA_INT *w, *w2, *p; | ||
| 128 | int j; | ||
| 129 | OUT_INT *samples2; | ||
| 130 | #if USE_FLOATS | ||
| 131 | float sum, sum2; | ||
| 132 | #else | ||
| 133 | int64_t sum, sum2; | ||
| 134 | #endif | ||
| 135 | |||
| 136 | /* copy to avoid wrap */ | ||
| 137 | 536604 | memcpy(synth_buf + 512, synth_buf, 32 * sizeof(*synth_buf)); | |
| 138 | |||
| 139 | 536604 | samples2 = samples + 31 * incr; | |
| 140 | 536604 | w = window; | |
| 141 | 536604 | w2 = window + 31; | |
| 142 | |||
| 143 | 536604 | sum = *dither_state; | |
| 144 | 536604 | p = synth_buf + 16; | |
| 145 | 536604 | SUM8(MACS, sum, w, p); | |
| 146 | 536604 | p = synth_buf + 48; | |
| 147 | 536604 | SUM8(MLSS, sum, w + 32, p); | |
| 148 | 536604 | *samples = round_sample(&sum); | |
| 149 | 536604 | samples += incr; | |
| 150 | 536604 | w++; | |
| 151 | |||
| 152 | /* we calculate two samples at the same time to avoid one memory | ||
| 153 | access per two sample */ | ||
| 154 |
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8585664 | for(j=1;j<16;j++) { |
| 155 | 8049060 | sum2 = 0; | |
| 156 | 8049060 | p = synth_buf + 16 + j; | |
| 157 | 8049060 | SUM8P2(sum, MACS, sum2, MLSS, w, w2, p); | |
| 158 | 8049060 | p = synth_buf + 48 - j; | |
| 159 | 8049060 | SUM8P2(sum, MLSS, sum2, MLSS, w + 32, w2 + 32, p); | |
| 160 | |||
| 161 | 8049060 | *samples = round_sample(&sum); | |
| 162 | 8049060 | samples += incr; | |
| 163 | 8049060 | sum += sum2; | |
| 164 | 8049060 | *samples2 = round_sample(&sum); | |
| 165 | 8049060 | samples2 -= incr; | |
| 166 | 8049060 | w++; | |
| 167 | 8049060 | w2--; | |
| 168 | } | ||
| 169 | |||
| 170 | 536604 | p = synth_buf + 32; | |
| 171 | 536604 | SUM8(MLSS, sum, w + 32, p); | |
| 172 | 536604 | *samples = round_sample(&sum); | |
| 173 | 536604 | *dither_state= sum; | |
| 174 | 536604 | } | |
| 175 | |||
| 176 | /* 32 sub band synthesis filter. Input: 32 sub band samples, Output: | ||
| 177 | 32 samples. */ | ||
| 178 | 538872 | void RENAME(ff_mpa_synth_filter)(MPADSPContext *s, MPA_INT *synth_buf_ptr, | |
| 179 | int *synth_buf_offset, | ||
| 180 | MPA_INT *window, int *dither_state, | ||
| 181 | OUT_INT *samples, ptrdiff_t incr, | ||
| 182 | MPA_INT *sb_samples) | ||
| 183 | { | ||
| 184 | MPA_INT *synth_buf; | ||
| 185 | int offset; | ||
| 186 | |||
| 187 | 538872 | offset = *synth_buf_offset; | |
| 188 | 538872 | synth_buf = synth_buf_ptr + offset; | |
| 189 | |||
| 190 | 538872 | s->RENAME(dct32)(synth_buf, sb_samples); | |
| 191 | 538872 | s->RENAME(apply_window)(synth_buf, window, dither_state, samples, incr); | |
| 192 | |||
| 193 | 538872 | offset = (offset - 32) & 511; | |
| 194 | 538872 | *synth_buf_offset = offset; | |
| 195 | 538872 | } | |
| 196 | |||
| 197 | 115 | static av_cold void mpa_synth_init(MPA_INT *window) | |
| 198 | { | ||
| 199 | int i, j; | ||
| 200 | |||
| 201 | /* max = 18760, max sum over all 16 coefs : 44736 */ | ||
| 202 |
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29670 | for(i=0;i<257;i++) { |
| 203 | INTFLOAT v; | ||
| 204 | 29555 | v = ff_mpa_enwindow[i]; | |
| 205 | #if USE_FLOATS | ||
| 206 | 16448 | v *= 1.0 / (1LL<<(16 + FRAC_BITS)); | |
| 207 | #endif | ||
| 208 | 29555 | window[i] = v; | |
| 209 |
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29555 | if ((i & 63) != 0) |
| 210 | 28980 | v = -v; | |
| 211 |
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29555 | if (i != 0) |
| 212 | 29440 | window[512 - i] = v; | |
| 213 | } | ||
| 214 | |||
| 215 | |||
| 216 | // Needed for avoiding shuffles in ASM implementations | ||
| 217 |
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| 218 |
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15640 | for(j=0; j < 16; j++) |
| 219 | 14720 | window[512+16*i+j] = window[64*i+32-j]; | |
| 220 | |||
| 221 |
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1035 | for(i=0; i < 8; i++) |
| 222 |
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15640 | for(j=0; j < 16; j++) |
| 223 | 14720 | window[512+128+16*i+j] = window[64*i+48-j]; | |
| 224 | 115 | } | |
| 225 | |||
| 226 | 115 | static av_cold void mpa_synth_window_init(void) | |
| 227 | { | ||
| 228 | 115 | mpa_synth_init(RENAME(ff_mpa_synth_window)); | |
| 229 | 115 | } | |
| 230 | |||
| 231 | 115 | av_cold void RENAME(ff_mpa_synth_init)(void) | |
| 232 | { | ||
| 233 | static AVOnce init_static_once = AV_ONCE_INIT; | ||
| 234 | 115 | ff_thread_once(&init_static_once, mpa_synth_window_init); | |
| 235 | 115 | } | |
| 236 | |||
| 237 | /* cos(pi*i/18) */ | ||
| 238 | #define C1 FIXHR(0.98480775301220805936/2) | ||
| 239 | #define C2 FIXHR(0.93969262078590838405/2) | ||
| 240 | #define C3 FIXHR(0.86602540378443864676/2) | ||
| 241 | #define C4 FIXHR(0.76604444311897803520/2) | ||
| 242 | #define C5 FIXHR(0.64278760968653932632/2) | ||
| 243 | #define C6 FIXHR(0.5/2) | ||
| 244 | #define C7 FIXHR(0.34202014332566873304/2) | ||
| 245 | #define C8 FIXHR(0.17364817766693034885/2) | ||
| 246 | |||
| 247 | /* 0.5 / cos(pi*(2*i+1)/36) */ | ||
| 248 | static const INTFLOAT icos36[9] = { | ||
| 249 | FIXR(0.50190991877167369479), | ||
| 250 | FIXR(0.51763809020504152469), //0 | ||
| 251 | FIXR(0.55168895948124587824), | ||
| 252 | FIXR(0.61038729438072803416), | ||
| 253 | FIXR(0.70710678118654752439), //1 | ||
| 254 | FIXR(0.87172339781054900991), | ||
| 255 | FIXR(1.18310079157624925896), | ||
| 256 | FIXR(1.93185165257813657349), //2 | ||
| 257 | FIXR(5.73685662283492756461), | ||
| 258 | }; | ||
| 259 | |||
| 260 | /* 0.5 / cos(pi*(2*i+1)/36) */ | ||
| 261 | static const INTFLOAT icos36h[9] = { | ||
| 262 | FIXHR(0.50190991877167369479/2), | ||
| 263 | FIXHR(0.51763809020504152469/2), //0 | ||
| 264 | FIXHR(0.55168895948124587824/2), | ||
| 265 | FIXHR(0.61038729438072803416/2), | ||
| 266 | FIXHR(0.70710678118654752439/2), //1 | ||
| 267 | FIXHR(0.87172339781054900991/2), | ||
| 268 | FIXHR(1.18310079157624925896/4), | ||
| 269 | FIXHR(1.93185165257813657349/4), //2 | ||
| 270 | // FIXHR(5.73685662283492756461), | ||
| 271 | }; | ||
| 272 | |||
| 273 | /* using Lee like decomposition followed by hand coded 9 points DCT */ | ||
| 274 | 155523 | static void imdct36(INTFLOAT *out, INTFLOAT *buf, SUINTFLOAT *in, INTFLOAT *win) | |
| 275 | { | ||
| 276 | int i, j; | ||
| 277 | SUINTFLOAT t0, t1, t2, t3, s0, s1, s2, s3; | ||
| 278 | SUINTFLOAT tmp[18], *tmp1, *in1; | ||
| 279 | |||
| 280 |
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2799414 | for (i = 17; i >= 1; i--) |
| 281 | 2643891 | in[i] += in[i-1]; | |
| 282 |
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1399707 | for (i = 17; i >= 3; i -= 2) |
| 283 | 1244184 | in[i] += in[i-2]; | |
| 284 | |||
| 285 |
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466569 | for (j = 0; j < 2; j++) { |
| 286 | 311046 | tmp1 = tmp + j; | |
| 287 | 311046 | in1 = in + j; | |
| 288 | |||
| 289 | 311046 | t2 = in1[2*4] + in1[2*8] - in1[2*2]; | |
| 290 | |||
| 291 | 311046 | t3 = in1[2*0] + SHR(in1[2*6],1); | |
| 292 | 311046 | t1 = in1[2*0] - in1[2*6]; | |
| 293 | 311046 | tmp1[ 6] = t1 - SHR(t2,1); | |
| 294 | 311046 | tmp1[16] = t1 + t2; | |
| 295 | |||
| 296 | 311046 | t0 = MULH3(in1[2*2] + in1[2*4] , C2, 2); | |
| 297 | 311046 | t1 = MULH3(in1[2*4] - in1[2*8] , -2*C8, 1); | |
| 298 | 311046 | t2 = MULH3(in1[2*2] + in1[2*8] , -C4, 2); | |
| 299 | |||
| 300 | 311046 | tmp1[10] = t3 - t0 - t2; | |
| 301 | 311046 | tmp1[ 2] = t3 + t0 + t1; | |
| 302 | 311046 | tmp1[14] = t3 + t2 - t1; | |
| 303 | |||
| 304 | 311046 | tmp1[ 4] = MULH3(in1[2*5] + in1[2*7] - in1[2*1], -C3, 2); | |
| 305 | 311046 | t2 = MULH3(in1[2*1] + in1[2*5], C1, 2); | |
| 306 | 311046 | t3 = MULH3(in1[2*5] - in1[2*7], -2*C7, 1); | |
| 307 | 311046 | t0 = MULH3(in1[2*3], C3, 2); | |
| 308 | |||
| 309 | 311046 | t1 = MULH3(in1[2*1] + in1[2*7], -C5, 2); | |
| 310 | |||
| 311 | 311046 | tmp1[ 0] = t2 + t3 + t0; | |
| 312 | 311046 | tmp1[12] = t2 + t1 - t0; | |
| 313 | 311046 | tmp1[ 8] = t3 - t1 - t0; | |
| 314 | } | ||
| 315 | |||
| 316 | 155523 | i = 0; | |
| 317 |
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777615 | for (j = 0; j < 4; j++) { |
| 318 | 622092 | t0 = tmp[i]; | |
| 319 | 622092 | t1 = tmp[i + 2]; | |
| 320 | 622092 | s0 = t1 + t0; | |
| 321 | 622092 | s2 = t1 - t0; | |
| 322 | |||
| 323 | 622092 | t2 = tmp[i + 1]; | |
| 324 | 622092 | t3 = tmp[i + 3]; | |
| 325 | 622092 | s1 = MULH3(t3 + t2, icos36h[ j], 2); | |
| 326 | 622092 | s3 = MULLx(t3 - t2, icos36 [8 - j], FRAC_BITS); | |
| 327 | |||
| 328 | 622092 | t0 = s0 + s1; | |
| 329 | 622092 | t1 = s0 - s1; | |
| 330 | 622092 | out[(9 + j) * SBLIMIT] = MULH3(t1, win[ 9 + j], 1) + buf[4*(9 + j)]; | |
| 331 | 622092 | out[(8 - j) * SBLIMIT] = MULH3(t1, win[ 8 - j], 1) + buf[4*(8 - j)]; | |
| 332 | 622092 | buf[4 * ( 9 + j )] = MULH3(t0, win[MDCT_BUF_SIZE/2 + 9 + j], 1); | |
| 333 | 622092 | buf[4 * ( 8 - j )] = MULH3(t0, win[MDCT_BUF_SIZE/2 + 8 - j], 1); | |
| 334 | |||
| 335 | 622092 | t0 = s2 + s3; | |
| 336 | 622092 | t1 = s2 - s3; | |
| 337 | 622092 | out[(9 + 8 - j) * SBLIMIT] = MULH3(t1, win[ 9 + 8 - j], 1) + buf[4*(9 + 8 - j)]; | |
| 338 | 622092 | out[ j * SBLIMIT] = MULH3(t1, win[ j], 1) + buf[4*( j)]; | |
| 339 | 622092 | buf[4 * ( 9 + 8 - j )] = MULH3(t0, win[MDCT_BUF_SIZE/2 + 9 + 8 - j], 1); | |
| 340 | 622092 | buf[4 * ( j )] = MULH3(t0, win[MDCT_BUF_SIZE/2 + j], 1); | |
| 341 | 622092 | i += 4; | |
| 342 | } | ||
| 343 | |||
| 344 | 155523 | s0 = tmp[16]; | |
| 345 | 155523 | s1 = MULH3(tmp[17], icos36h[4], 2); | |
| 346 | 155523 | t0 = s0 + s1; | |
| 347 | 155523 | t1 = s0 - s1; | |
| 348 | 155523 | out[(9 + 4) * SBLIMIT] = MULH3(t1, win[ 9 + 4], 1) + buf[4*(9 + 4)]; | |
| 349 | 155523 | out[(8 - 4) * SBLIMIT] = MULH3(t1, win[ 8 - 4], 1) + buf[4*(8 - 4)]; | |
| 350 | 155523 | buf[4 * ( 9 + 4 )] = MULH3(t0, win[MDCT_BUF_SIZE/2 + 9 + 4], 1); | |
| 351 | 155523 | buf[4 * ( 8 - 4 )] = MULH3(t0, win[MDCT_BUF_SIZE/2 + 8 - 4], 1); | |
| 352 | 155523 | } | |
| 353 | |||
| 354 | 8034 | void RENAME(ff_imdct36_blocks)(INTFLOAT *out, INTFLOAT *buf, INTFLOAT *in, | |
| 355 | int count, int switch_point, int block_type) | ||
| 356 | { | ||
| 357 | int j; | ||
| 358 |
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163557 | for (j=0 ; j < count; j++) { |
| 359 | /* apply window & overlap with previous buffer */ | ||
| 360 | |||
| 361 | /* select window */ | ||
| 362 |
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155523 | int win_idx = (switch_point && j < 2) ? 0 : block_type; |
| 363 | 155523 | INTFLOAT *win = RENAME(ff_mdct_win)[win_idx + (4 & -(j & 1))]; | |
| 364 | |||
| 365 | 155523 | imdct36(out, buf, in, win); | |
| 366 | |||
| 367 | 155523 | in += 18; | |
| 368 |
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155523 | buf += ((j&3) != 3 ? 1 : (72-3)); |
| 369 | 155523 | out++; | |
| 370 | } | ||
| 371 | 8034 | } | |
| 372 | |||
| 373 |