Diffstat (limited to 'core/multimedia/opieplayer/libmad/synth.c') (more/less context) (ignore whitespace changes)
-rw-r--r-- | core/multimedia/opieplayer/libmad/synth.c | 855 |
1 files changed, 855 insertions, 0 deletions
diff --git a/core/multimedia/opieplayer/libmad/synth.c b/core/multimedia/opieplayer/libmad/synth.c new file mode 100644 index 0000000..e1914c9 --- a/dev/null +++ b/core/multimedia/opieplayer/libmad/synth.c | |||
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1 | /* | ||
2 | * mad - MPEG audio decoder | ||
3 | * Copyright (C) 2000-2001 Robert Leslie | ||
4 | * | ||
5 | * This program is free software; you can redistribute it and/or modify | ||
6 | * it under the terms of the GNU General Public License as published by | ||
7 | * the Free Software Foundation; either version 2 of the License, or | ||
8 | * (at your option) any later version. | ||
9 | * | ||
10 | * This program is distributed in the hope that it will be useful, | ||
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
13 | * GNU General Public License for more details. | ||
14 | * | ||
15 | * You should have received a copy of the GNU General Public License | ||
16 | * along with this program; if not, write to the Free Software | ||
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
18 | * | ||
19 | * $Id$ | ||
20 | */ | ||
21 | |||
22 | # ifdef HAVE_CONFIG_H | ||
23 | # include "libmad_config.h" | ||
24 | # endif | ||
25 | |||
26 | # include "libmad_global.h" | ||
27 | |||
28 | # include "fixed.h" | ||
29 | # include "frame.h" | ||
30 | # include "synth.h" | ||
31 | |||
32 | /* | ||
33 | * NAME:synth->init() | ||
34 | * DESCRIPTION:initialize synth struct | ||
35 | */ | ||
36 | void mad_synth_init(struct mad_synth *synth) | ||
37 | { | ||
38 | mad_synth_mute(synth); | ||
39 | |||
40 | synth->phase = 0; | ||
41 | |||
42 | synth->pcm.samplerate = 0; | ||
43 | synth->pcm.channels = 0; | ||
44 | synth->pcm.length = 0; | ||
45 | } | ||
46 | |||
47 | /* | ||
48 | * NAME:synth->mute() | ||
49 | * DESCRIPTION:zero all polyphase filterbank values, resetting synthesis | ||
50 | */ | ||
51 | void mad_synth_mute(struct mad_synth *synth) | ||
52 | { | ||
53 | unsigned int ch, s, v; | ||
54 | |||
55 | for (ch = 0; ch < 2; ++ch) { | ||
56 | for (s = 0; s < 16; ++s) { | ||
57 | for (v = 0; v < 8; ++v) { | ||
58 | synth->filter[ch][0][0][s][v] = synth->filter[ch][0][1][s][v] = | ||
59 | synth->filter[ch][1][0][s][v] = synth->filter[ch][1][1][s][v] = 0; | ||
60 | } | ||
61 | } | ||
62 | } | ||
63 | } | ||
64 | |||
65 | /* | ||
66 | * An optional optimization called here the Subband Synthesis Optimization | ||
67 | * (SSO) improves the performance of subband synthesis at the expense of | ||
68 | * accuracy. | ||
69 | * | ||
70 | * The idea is to simplify 32x32->64-bit multiplication to 32x32->32 such | ||
71 | * that extra scaling and rounding are not necessary. This often allows the | ||
72 | * compiler to use faster 32-bit multiply-accumulate instructions instead of | ||
73 | * explicit 64-bit multiply, shift, and add instructions. | ||
74 | * | ||
75 | * SSO works like this: a full 32x32->64-bit multiply of two mad_fixed_t | ||
76 | * values requires the result to be right-shifted 28 bits to be properly | ||
77 | * scaled to the same fixed-point format. Right shifts can be applied at any | ||
78 | * time to either operand or to the result, so the optimization involves | ||
79 | * careful placement of these shifts to minimize the loss of accuracy. | ||
80 | * | ||
81 | * First, a 14-bit shift is applied with rounding at compile-time to the D[] | ||
82 | * table of coefficients for the subband synthesis window. This only loses 2 | ||
83 | * bits of accuracy because the lower 12 bits are always zero. A second | ||
84 | * 12-bit shift occurs after the DCT calculation. This loses 12 bits of | ||
85 | * accuracy. Finally, a third 2-bit shift occurs just before the sample is | ||
86 | * saved in the PCM buffer. 14 + 12 + 2 == 28 bits. | ||
87 | */ | ||
88 | |||
89 | /* FPM_DEFAULT without OPT_SSO will actually lose accuracy and performance */ | ||
90 | |||
91 | # if defined(FPM_DEFAULT) && !defined(OPT_SSO) | ||
92 | # define OPT_SSO | ||
93 | # endif | ||
94 | |||
95 | /* second SSO shift, with rounding */ | ||
96 | |||
97 | # if defined(OPT_SSO) | ||
98 | # define SHIFT(x) (((x) + (1L << 11)) >> 12) | ||
99 | # else | ||
100 | # define SHIFT(x) (x) | ||
101 | # endif | ||
102 | |||
103 | /* possible DCT speed optimization */ | ||
104 | |||
105 | # if defined(OPT_SPEED) && defined(MAD_F_MLX) | ||
106 | # define OPT_DCTO | ||
107 | # define MUL(x, y) \ | ||
108 | ({ mad_fixed64hi_t hi; \ | ||
109 | mad_fixed64lo_t lo; \ | ||
110 | MAD_F_MLX(hi, lo, (x), (y)); \ | ||
111 | hi << (32 - MAD_F_SCALEBITS - 3); \ | ||
112 | }) | ||
113 | # else | ||
114 | # undef OPT_DCTO | ||
115 | # define MUL(x, y) mad_f_mul((x), (y)) | ||
116 | # endif | ||
117 | |||
118 | /* | ||
119 | * NAME:dct32() | ||
120 | * DESCRIPTION:perform fast in[32]->out[32] DCT | ||
121 | */ | ||
122 | static | ||
123 | void dct32(mad_fixed_t const in[32], unsigned int slot, | ||
124 | mad_fixed_t lo[16][8], mad_fixed_t hi[16][8]) | ||
125 | { | ||
126 | mad_fixed_t t0, t1, t2, t3, t4, t5, t6, t7; | ||
127 | mad_fixed_t t8, t9, t10, t11, t12, t13, t14, t15; | ||
128 | mad_fixed_t t16, t17, t18, t19, t20, t21, t22, t23; | ||
129 | mad_fixed_t t24, t25, t26, t27, t28, t29, t30, t31; | ||
130 | mad_fixed_t t32, t33, t34, t35, t36, t37, t38, t39; | ||
131 | mad_fixed_t t40, t41, t42, t43, t44, t45, t46, t47; | ||
132 | mad_fixed_t t48, t49, t50, t51, t52, t53, t54, t55; | ||
133 | mad_fixed_t t56, t57, t58, t59, t60, t61, t62, t63; | ||
134 | mad_fixed_t t64, t65, t66, t67, t68, t69, t70, t71; | ||
135 | mad_fixed_t t72, t73, t74, t75, t76, t77, t78, t79; | ||
136 | mad_fixed_t t80, t81, t82, t83, t84, t85, t86, t87; | ||
137 | mad_fixed_t t88, t89, t90, t91, t92, t93, t94, t95; | ||
138 | mad_fixed_t t96, t97, t98, t99, t100, t101, t102, t103; | ||
139 | mad_fixed_t t104, t105, t106, t107, t108, t109, t110, t111; | ||
140 | mad_fixed_t t112, t113, t114, t115, t116, t117, t118, t119; | ||
141 | mad_fixed_t t120, t121, t122, t123, t124, t125, t126, t127; | ||
142 | mad_fixed_t t128, t129, t130, t131, t132, t133, t134, t135; | ||
143 | mad_fixed_t t136, t137, t138, t139, t140, t141, t142, t143; | ||
144 | mad_fixed_t t144, t145, t146, t147, t148, t149, t150, t151; | ||
145 | mad_fixed_t t152, t153, t154, t155, t156, t157, t158, t159; | ||
146 | mad_fixed_t t160, t161, t162, t163, t164, t165, t166, t167; | ||
147 | mad_fixed_t t168, t169, t170, t171, t172, t173, t174, t175; | ||
148 | mad_fixed_t t176; | ||
149 | |||
150 | /* costab[i] = cos(PI / (2 * 32) * i) */ | ||
151 | |||
152 | # if defined(OPT_DCTO) | ||
153 | enum { | ||
154 | costab1 = MAD_F(0x7fd8878e), | ||
155 | costab2 = MAD_F(0x7f62368f), | ||
156 | costab3 = MAD_F(0x7e9d55fc), | ||
157 | costab4 = MAD_F(0x7d8a5f40), | ||
158 | costab5 = MAD_F(0x7c29fbee), | ||
159 | costab6 = MAD_F(0x7a7d055b), | ||
160 | costab7 = MAD_F(0x78848414), | ||
161 | costab8 = MAD_F(0x7641af3d), | ||
162 | costab9 = MAD_F(0x73b5ebd1), | ||
163 | costab10 = MAD_F(0x70e2cbc6), | ||
164 | costab11 = MAD_F(0x6dca0d14), | ||
165 | costab12 = MAD_F(0x6a6d98a4), | ||
166 | costab13 = MAD_F(0x66cf8120), | ||
167 | costab14 = MAD_F(0x62f201ac), | ||
168 | costab15 = MAD_F(0x5ed77c8a), | ||
169 | costab16 = MAD_F(0x5a82799a), | ||
170 | costab17 = MAD_F(0x55f5a4d2), | ||
171 | costab18 = MAD_F(0x5133cc94), | ||
172 | costab19 = MAD_F(0x4c3fdff4), | ||
173 | costab20 = MAD_F(0x471cece7), | ||
174 | costab21 = MAD_F(0x41ce1e65), | ||
175 | costab22 = MAD_F(0x3c56ba70), | ||
176 | costab23 = MAD_F(0x36ba2014), | ||
177 | costab24 = MAD_F(0x30fbc54d), | ||
178 | costab25 = MAD_F(0x2b1f34eb), | ||
179 | costab26 = MAD_F(0x25280c5e), | ||
180 | costab27 = MAD_F(0x1f19f97b), | ||
181 | costab28 = MAD_F(0x18f8b83c), | ||
182 | costab29 = MAD_F(0x12c8106f), | ||
183 | costab30 = MAD_F(0x0c8bd35e), | ||
184 | costab31 = MAD_F(0x0647d97c) | ||
185 | }; | ||
186 | # else | ||
187 | enum { | ||
188 | costab1 = MAD_F(0x0ffb10f2), /* 0.998795456 */ | ||
189 | costab2 = MAD_F(0x0fec46d2), /* 0.995184727 */ | ||
190 | costab3 = MAD_F(0x0fd3aac0), /* 0.989176510 */ | ||
191 | costab4 = MAD_F(0x0fb14be8), /* 0.980785280 */ | ||
192 | costab5 = MAD_F(0x0f853f7e), /* 0.970031253 */ | ||
193 | costab6 = MAD_F(0x0f4fa0ab), /* 0.956940336 */ | ||
194 | costab7 = MAD_F(0x0f109082), /* 0.941544065 */ | ||
195 | costab8 = MAD_F(0x0ec835e8), /* 0.923879533 */ | ||
196 | costab9 = MAD_F(0x0e76bd7a), /* 0.903989293 */ | ||
197 | costab10 = MAD_F(0x0e1c5979), /* 0.881921264 */ | ||
198 | costab11 = MAD_F(0x0db941a3), /* 0.857728610 */ | ||
199 | costab12 = MAD_F(0x0d4db315), /* 0.831469612 */ | ||
200 | costab13 = MAD_F(0x0cd9f024), /* 0.803207531 */ | ||
201 | costab14 = MAD_F(0x0c5e4036), /* 0.773010453 */ | ||
202 | costab15 = MAD_F(0x0bdaef91), /* 0.740951125 */ | ||
203 | costab16 = MAD_F(0x0b504f33), /* 0.707106781 */ | ||
204 | costab17 = MAD_F(0x0abeb49a), /* 0.671558955 */ | ||
205 | costab18 = MAD_F(0x0a267993), /* 0.634393284 */ | ||
206 | costab19 = MAD_F(0x0987fbfe), /* 0.595699304 */ | ||
207 | costab20 = MAD_F(0x08e39d9d), /* 0.555570233 */ | ||
208 | costab21 = MAD_F(0x0839c3cd), /* 0.514102744 */ | ||
209 | costab22 = MAD_F(0x078ad74e), /* 0.471396737 */ | ||
210 | costab23 = MAD_F(0x06d74402), /* 0.427555093 */ | ||
211 | costab24 = MAD_F(0x061f78aa), /* 0.382683432 */ | ||
212 | costab25 = MAD_F(0x0563e69d), /* 0.336889853 */ | ||
213 | costab26 = MAD_F(0x04a5018c), /* 0.290284677 */ | ||
214 | costab27 = MAD_F(0x03e33f2f), /* 0.242980180 */ | ||
215 | costab28 = MAD_F(0x031f1708), /* 0.195090322 */ | ||
216 | costab29 = MAD_F(0x0259020e), /* 0.146730474 */ | ||
217 | costab30 = MAD_F(0x01917a6c), /* 0.098017140 */ | ||
218 | costab31 = MAD_F(0x00c8fb30) /* 0.049067674 */ | ||
219 | }; | ||
220 | # endif | ||
221 | |||
222 | t0 = in[0] + in[31]; t16 = MUL(in[0] - in[31], costab1); | ||
223 | t1 = in[15] + in[16]; t17 = MUL(in[15] - in[16], costab31); | ||
224 | |||
225 | t41 = t16 + t17; | ||
226 | t59 = MUL(t16 - t17, costab2); | ||
227 | t33 = t0 + t1; | ||
228 | t50 = MUL(t0 - t1, costab2); | ||
229 | |||
230 | t2 = in[7] + in[24]; t18 = MUL(in[7] - in[24], costab15); | ||
231 | t3 = in[8] + in[23]; t19 = MUL(in[8] - in[23], costab17); | ||
232 | |||
233 | t42 = t18 + t19; | ||
234 | t60 = MUL(t18 - t19, costab30); | ||
235 | t34 = t2 + t3; | ||
236 | t51 = MUL(t2 - t3, costab30); | ||
237 | |||
238 | t4 = in[3] + in[28]; t20 = MUL(in[3] - in[28], costab7); | ||
239 | t5 = in[12] + in[19]; t21 = MUL(in[12] - in[19], costab25); | ||
240 | |||
241 | t43 = t20 + t21; | ||
242 | t61 = MUL(t20 - t21, costab14); | ||
243 | t35 = t4 + t5; | ||
244 | t52 = MUL(t4 - t5, costab14); | ||
245 | |||
246 | t6 = in[4] + in[27]; t22 = MUL(in[4] - in[27], costab9); | ||
247 | t7 = in[11] + in[20]; t23 = MUL(in[11] - in[20], costab23); | ||
248 | |||
249 | t44 = t22 + t23; | ||
250 | t62 = MUL(t22 - t23, costab18); | ||
251 | t36 = t6 + t7; | ||
252 | t53 = MUL(t6 - t7, costab18); | ||
253 | |||
254 | t8 = in[1] + in[30]; t24 = MUL(in[1] - in[30], costab3); | ||
255 | t9 = in[14] + in[17]; t25 = MUL(in[14] - in[17], costab29); | ||
256 | |||
257 | t45 = t24 + t25; | ||
258 | t63 = MUL(t24 - t25, costab6); | ||
259 | t37 = t8 + t9; | ||
260 | t54 = MUL(t8 - t9, costab6); | ||
261 | |||
262 | t10 = in[6] + in[25]; t26 = MUL(in[6] - in[25], costab13); | ||
263 | t11 = in[9] + in[22]; t27 = MUL(in[9] - in[22], costab19); | ||
264 | |||
265 | t46 = t26 + t27; | ||
266 | t64 = MUL(t26 - t27, costab26); | ||
267 | t38 = t10 + t11; | ||
268 | t55 = MUL(t10 - t11, costab26); | ||
269 | |||
270 | t12 = in[2] + in[29]; t28 = MUL(in[2] - in[29], costab5); | ||
271 | t13 = in[13] + in[18]; t29 = MUL(in[13] - in[18], costab27); | ||
272 | |||
273 | t47 = t28 + t29; | ||
274 | t65 = MUL(t28 - t29, costab10); | ||
275 | t39 = t12 + t13; | ||
276 | t56 = MUL(t12 - t13, costab10); | ||
277 | |||
278 | t14 = in[5] + in[26]; t30 = MUL(in[5] - in[26], costab11); | ||
279 | t15 = in[10] + in[21]; t31 = MUL(in[10] - in[21], costab21); | ||
280 | |||
281 | t48 = t30 + t31; | ||
282 | t66 = MUL(t30 - t31, costab22); | ||
283 | t40 = t14 + t15; | ||
284 | t57 = MUL(t14 - t15, costab22); | ||
285 | |||
286 | t69 = t33 + t34; t89 = MUL(t33 - t34, costab4); | ||
287 | t70 = t35 + t36; t90 = MUL(t35 - t36, costab28); | ||
288 | t71 = t37 + t38; t91 = MUL(t37 - t38, costab12); | ||
289 | t72 = t39 + t40; t92 = MUL(t39 - t40, costab20); | ||
290 | t73 = t41 + t42; t94 = MUL(t41 - t42, costab4); | ||
291 | t74 = t43 + t44; t95 = MUL(t43 - t44, costab28); | ||
292 | t75 = t45 + t46; t96 = MUL(t45 - t46, costab12); | ||
293 | t76 = t47 + t48; t97 = MUL(t47 - t48, costab20); | ||
294 | |||
295 | t78 = t50 + t51; t100 = MUL(t50 - t51, costab4); | ||
296 | t79 = t52 + t53; t101 = MUL(t52 - t53, costab28); | ||
297 | t80 = t54 + t55; t102 = MUL(t54 - t55, costab12); | ||
298 | t81 = t56 + t57; t103 = MUL(t56 - t57, costab20); | ||
299 | |||
300 | t83 = t59 + t60; t106 = MUL(t59 - t60, costab4); | ||
301 | t84 = t61 + t62; t107 = MUL(t61 - t62, costab28); | ||
302 | t85 = t63 + t64; t108 = MUL(t63 - t64, costab12); | ||
303 | t86 = t65 + t66; t109 = MUL(t65 - t66, costab20); | ||
304 | |||
305 | t113 = t69 + t70; | ||
306 | t114 = t71 + t72; | ||
307 | |||
308 | /* 0 */ hi[15][slot] = SHIFT(t113 + t114); | ||
309 | /* 16 */ lo[ 0][slot] = SHIFT(MUL(t113 - t114, costab16)); | ||
310 | |||
311 | t115 = t73 + t74; | ||
312 | t116 = t75 + t76; | ||
313 | |||
314 | t32 = t115 + t116; | ||
315 | |||
316 | /* 1 */ hi[14][slot] = SHIFT(t32); | ||
317 | |||
318 | t118 = t78 + t79; | ||
319 | t119 = t80 + t81; | ||
320 | |||
321 | t58 = t118 + t119; | ||
322 | |||
323 | /* 2 */ hi[13][slot] = SHIFT(t58); | ||
324 | |||
325 | t121 = t83 + t84; | ||
326 | t122 = t85 + t86; | ||
327 | |||
328 | t67 = t121 + t122; | ||
329 | |||
330 | t49 = (t67 << 1) - t32; | ||
331 | |||
332 | /* 3 */ hi[12][slot] = SHIFT(t49); | ||
333 | |||
334 | t125 = t89 + t90; | ||
335 | t126 = t91 + t92; | ||
336 | |||
337 | t93 = t125 + t126; | ||
338 | |||
339 | /* 4 */ hi[11][slot] = SHIFT(t93); | ||
340 | |||
341 | t128 = t94 + t95; | ||
342 | t129 = t96 + t97; | ||
343 | |||
344 | t98 = t128 + t129; | ||
345 | |||
346 | t68 = (t98 << 1) - t49; | ||
347 | |||
348 | /* 5 */ hi[10][slot] = SHIFT(t68); | ||
349 | |||
350 | t132 = t100 + t101; | ||
351 | t133 = t102 + t103; | ||
352 | |||
353 | t104 = t132 + t133; | ||
354 | |||
355 | t82 = (t104 << 1) - t58; | ||
356 | |||
357 | /* 6 */ hi[ 9][slot] = SHIFT(t82); | ||
358 | |||
359 | t136 = t106 + t107; | ||
360 | t137 = t108 + t109; | ||
361 | |||
362 | t110 = t136 + t137; | ||
363 | |||
364 | t87 = (t110 << 1) - t67; | ||
365 | |||
366 | t77 = (t87 << 1) - t68; | ||
367 | |||
368 | /* 7 */ hi[ 8][slot] = SHIFT(t77); | ||
369 | |||
370 | t141 = MUL(t69 - t70, costab8); | ||
371 | t142 = MUL(t71 - t72, costab24); | ||
372 | t143 = t141 + t142; | ||
373 | |||
374 | /* 8 */ hi[ 7][slot] = SHIFT(t143); | ||
375 | /* 24 */ lo[ 8][slot] = | ||
376 | SHIFT((MUL(t141 - t142, costab16) << 1) - t143); | ||
377 | |||
378 | t144 = MUL(t73 - t74, costab8); | ||
379 | t145 = MUL(t75 - t76, costab24); | ||
380 | t146 = t144 + t145; | ||
381 | |||
382 | t88 = (t146 << 1) - t77; | ||
383 | |||
384 | /* 9 */ hi[ 6][slot] = SHIFT(t88); | ||
385 | |||
386 | t148 = MUL(t78 - t79, costab8); | ||
387 | t149 = MUL(t80 - t81, costab24); | ||
388 | t150 = t148 + t149; | ||
389 | |||
390 | t105 = (t150 << 1) - t82; | ||
391 | |||
392 | /* 10 */ hi[ 5][slot] = SHIFT(t105); | ||
393 | |||
394 | t152 = MUL(t83 - t84, costab8); | ||
395 | t153 = MUL(t85 - t86, costab24); | ||
396 | t154 = t152 + t153; | ||
397 | |||
398 | t111 = (t154 << 1) - t87; | ||
399 | |||
400 | t99 = (t111 << 1) - t88; | ||
401 | |||
402 | /* 11 */ hi[ 4][slot] = SHIFT(t99); | ||
403 | |||
404 | t157 = MUL(t89 - t90, costab8); | ||
405 | t158 = MUL(t91 - t92, costab24); | ||
406 | t159 = t157 + t158; | ||
407 | |||
408 | t127 = (t159 << 1) - t93; | ||
409 | |||
410 | /* 12 */ hi[ 3][slot] = SHIFT(t127); | ||
411 | |||
412 | t160 = (MUL(t125 - t126, costab16) << 1) - t127; | ||
413 | |||
414 | /* 20 */ lo[ 4][slot] = SHIFT(t160); | ||
415 | /* 28 */ lo[12][slot] = | ||
416 | SHIFT((((MUL(t157 - t158, costab16) << 1) - t159) << 1) - t160); | ||
417 | |||
418 | t161 = MUL(t94 - t95, costab8); | ||
419 | t162 = MUL(t96 - t97, costab24); | ||
420 | t163 = t161 + t162; | ||
421 | |||
422 | t130 = (t163 << 1) - t98; | ||
423 | |||
424 | t112 = (t130 << 1) - t99; | ||
425 | |||
426 | /* 13 */ hi[ 2][slot] = SHIFT(t112); | ||
427 | |||
428 | t164 = (MUL(t128 - t129, costab16) << 1) - t130; | ||
429 | |||
430 | t166 = MUL(t100 - t101, costab8); | ||
431 | t167 = MUL(t102 - t103, costab24); | ||
432 | t168 = t166 + t167; | ||
433 | |||
434 | t134 = (t168 << 1) - t104; | ||
435 | |||
436 | t120 = (t134 << 1) - t105; | ||
437 | |||
438 | /* 14 */ hi[ 1][slot] = SHIFT(t120); | ||
439 | |||
440 | t135 = (MUL(t118 - t119, costab16) << 1) - t120; | ||
441 | |||
442 | /* 18 */ lo[ 2][slot] = SHIFT(t135); | ||
443 | |||
444 | t169 = (MUL(t132 - t133, costab16) << 1) - t134; | ||
445 | |||
446 | t151 = (t169 << 1) - t135; | ||
447 | |||
448 | /* 22 */ lo[ 6][slot] = SHIFT(t151); | ||
449 | |||
450 | t170 = (((MUL(t148 - t149, costab16) << 1) - t150) << 1) - t151; | ||
451 | |||
452 | /* 26 */ lo[10][slot] = SHIFT(t170); | ||
453 | /* 30 */ lo[14][slot] = | ||
454 | SHIFT((((((MUL(t166 - t167, costab16) << 1) - | ||
455 | t168) << 1) - t169) << 1) - t170); | ||
456 | |||
457 | t171 = MUL(t106 - t107, costab8); | ||
458 | t172 = MUL(t108 - t109, costab24); | ||
459 | t173 = t171 + t172; | ||
460 | |||
461 | t138 = (t173 << 1) - t110; | ||
462 | |||
463 | t123 = (t138 << 1) - t111; | ||
464 | |||
465 | t139 = (MUL(t121 - t122, costab16) << 1) - t123; | ||
466 | |||
467 | t117 = (t123 << 1) - t112; | ||
468 | |||
469 | /* 15 */ hi[ 0][slot] = SHIFT(t117); | ||
470 | |||
471 | t124 = (MUL(t115 - t116, costab16) << 1) - t117; | ||
472 | |||
473 | /* 17 */ lo[ 1][slot] = SHIFT(t124); | ||
474 | |||
475 | t131 = (t139 << 1) - t124; | ||
476 | |||
477 | /* 19 */ lo[ 3][slot] = SHIFT(t131); | ||
478 | |||
479 | t140 = (t164 << 1) - t131; | ||
480 | |||
481 | /* 21 */ lo[ 5][slot] = SHIFT(t140); | ||
482 | |||
483 | t174 = (MUL(t136 - t137, costab16) << 1) - t138; | ||
484 | |||
485 | t155 = (t174 << 1) - t139; | ||
486 | |||
487 | t147 = (t155 << 1) - t140; | ||
488 | |||
489 | /* 23 */ lo[ 7][slot] = SHIFT(t147); | ||
490 | |||
491 | t156 = (((MUL(t144 - t145, costab16) << 1) - t146) << 1) - t147; | ||
492 | |||
493 | /* 25 */ lo[ 9][slot] = SHIFT(t156); | ||
494 | |||
495 | t175 = (((MUL(t152 - t153, costab16) << 1) - t154) << 1) - t155; | ||
496 | |||
497 | t165 = (t175 << 1) - t156; | ||
498 | |||
499 | /* 27 */ lo[11][slot] = SHIFT(t165); | ||
500 | |||
501 | t176 = (((((MUL(t161 - t162, costab16) << 1) - | ||
502 | t163) << 1) - t164) << 1) - t165; | ||
503 | |||
504 | /* 29 */ lo[13][slot] = SHIFT(t176); | ||
505 | /* 31 */ lo[15][slot] = | ||
506 | SHIFT((((((((MUL(t171 - t172, costab16) << 1) - | ||
507 | t173) << 1) - t174) << 1) - t175) << 1) - t176); | ||
508 | |||
509 | /* | ||
510 | * Totals: | ||
511 | * 80 multiplies | ||
512 | * 80 additions | ||
513 | * 119 subtractions | ||
514 | * 49 shifts (not counting SSO) | ||
515 | */ | ||
516 | } | ||
517 | |||
518 | # undef MUL | ||
519 | # undef SHIFT | ||
520 | |||
521 | /* third SSO shift and/or D[] optimization preshift */ | ||
522 | |||
523 | # if defined(OPT_SSO) | ||
524 | # if MAD_F_FRACBITS != 28 | ||
525 | # error "MAD_F_FRACBITS must be 28 to use OPT_SSO" | ||
526 | # endif | ||
527 | # define ML0(hi, lo, x, y)((lo) = (x) * (y)) | ||
528 | # define MLA(hi, lo, x, y)((lo) += (x) * (y)) | ||
529 | # define MLZ(hi, lo) ((void) (hi), (mad_fixed_t) (lo)) | ||
530 | # define SHIFT(x) ((x) >> 2) | ||
531 | # define PRESHIFT(x) ((MAD_F(x) + (1L << 13)) >> 14) | ||
532 | # else | ||
533 | # define ML0(hi, lo, x, y)MAD_F_ML0((hi), (lo), (x), (y)) | ||
534 | # define MLA(hi, lo, x, y)MAD_F_MLA((hi), (lo), (x), (y)) | ||
535 | # define MLZ(hi, lo) MAD_F_MLZ((hi), (lo)) | ||
536 | # define SHIFT(x) (x) | ||
537 | # if defined(MAD_F_SCALEBITS) | ||
538 | # undef MAD_F_SCALEBITS | ||
539 | # define MAD_F_SCALEBITS(MAD_F_FRACBITS - 12) | ||
540 | # define PRESHIFT(x) (MAD_F(x) >> 12) | ||
541 | # else | ||
542 | # define PRESHIFT(x) MAD_F(x) | ||
543 | # endif | ||
544 | # endif | ||
545 | |||
546 | static | ||
547 | mad_fixed_t const D[17][32] = { | ||
548 | # include "D.dat" | ||
549 | }; | ||
550 | |||
551 | # if defined(ASO_SYNTH) | ||
552 | void synth_full(struct mad_synth *, struct mad_frame const *, | ||
553 | unsigned int, unsigned int); | ||
554 | # else | ||
555 | /* | ||
556 | * NAME:synth->full() | ||
557 | * DESCRIPTION:perform full frequency PCM synthesis | ||
558 | */ | ||
559 | static | ||
560 | void synth_full(struct mad_synth *synth, struct mad_frame const *frame, | ||
561 | unsigned int nch, unsigned int ns) | ||
562 | { | ||
563 | unsigned int phase, ch, s, sb, pe, po; | ||
564 | mad_fixed_t *pcm1, *pcm2, (*filter)[2][2][16][8]; | ||
565 | mad_fixed_t const (*sbsample)[36][32]; | ||
566 | register mad_fixed_t (*fe)[8], (*fx)[8], (*fo)[8]; | ||
567 | register mad_fixed_t const (*Dptr)[32], *ptr; | ||
568 | register mad_fixed64hi_t hi; | ||
569 | register mad_fixed64lo_t lo; | ||
570 | |||
571 | for (ch = 0; ch < nch; ++ch) { | ||
572 | sbsample = &frame->sbsample[ch]; | ||
573 | filter = &synth->filter[ch]; | ||
574 | phase = synth->phase; | ||
575 | pcm1 = synth->pcm.samples[ch]; | ||
576 | |||
577 | for (s = 0; s < ns; ++s) { | ||
578 | dct32((*sbsample)[s], phase >> 1, | ||
579 | (*filter)[0][phase & 1], (*filter)[1][phase & 1]); | ||
580 | |||
581 | pe = phase & ~1; | ||
582 | po = ((phase - 1) & 0xf) | 1; | ||
583 | |||
584 | /* calculate 32 samples */ | ||
585 | |||
586 | fe = &(*filter)[0][ phase & 1][0]; | ||
587 | fx = &(*filter)[0][~phase & 1][0]; | ||
588 | fo = &(*filter)[1][~phase & 1][0]; | ||
589 | |||
590 | Dptr = &D[0]; | ||
591 | |||
592 | ptr = *Dptr + pe; | ||
593 | ML0(hi, lo, (*fe)[0], ptr[ 0]); | ||
594 | MLA(hi, lo, (*fe)[1], ptr[14]); | ||
595 | MLA(hi, lo, (*fe)[2], ptr[12]); | ||
596 | MLA(hi, lo, (*fe)[3], ptr[10]); | ||
597 | MLA(hi, lo, (*fe)[4], ptr[ 8]); | ||
598 | MLA(hi, lo, (*fe)[5], ptr[ 6]); | ||
599 | MLA(hi, lo, (*fe)[6], ptr[ 4]); | ||
600 | MLA(hi, lo, (*fe)[7], ptr[ 2]); | ||
601 | |||
602 | ptr = *Dptr + po; | ||
603 | MLA(hi, lo, (*fx)[0], -ptr[ 0]); | ||
604 | MLA(hi, lo, (*fx)[1], -ptr[14]); | ||
605 | MLA(hi, lo, (*fx)[2], -ptr[12]); | ||
606 | MLA(hi, lo, (*fx)[3], -ptr[10]); | ||
607 | MLA(hi, lo, (*fx)[4], -ptr[ 8]); | ||
608 | MLA(hi, lo, (*fx)[5], -ptr[ 6]); | ||
609 | MLA(hi, lo, (*fx)[6], -ptr[ 4]); | ||
610 | MLA(hi, lo, (*fx)[7], -ptr[ 2]); | ||
611 | |||
612 | *pcm1++ = SHIFT(MLZ(hi, lo)); | ||
613 | |||
614 | pcm2 = pcm1 + 30; | ||
615 | |||
616 | for (sb = 1; sb < 16; ++sb) { | ||
617 | ++fe; | ||
618 | ++Dptr; | ||
619 | |||
620 | /* D[32 - sb][i] == -D[sb][31 - i] */ | ||
621 | |||
622 | ptr = *Dptr + pe; | ||
623 | ML0(hi, lo, (*fe)[7], ptr[ 2]); | ||
624 | MLA(hi, lo, (*fe)[6], ptr[ 4]); | ||
625 | MLA(hi, lo, (*fe)[5], ptr[ 6]); | ||
626 | MLA(hi, lo, (*fe)[4], ptr[ 8]); | ||
627 | MLA(hi, lo, (*fe)[3], ptr[10]); | ||
628 | MLA(hi, lo, (*fe)[2], ptr[12]); | ||
629 | MLA(hi, lo, (*fe)[1], ptr[14]); | ||
630 | MLA(hi, lo, (*fe)[0], ptr[ 0]); | ||
631 | |||
632 | ptr = *Dptr + po; | ||
633 | MLA(hi, lo, (*fo)[0], -ptr[ 0]); | ||
634 | MLA(hi, lo, (*fo)[1], -ptr[14]); | ||
635 | MLA(hi, lo, (*fo)[2], -ptr[12]); | ||
636 | MLA(hi, lo, (*fo)[3], -ptr[10]); | ||
637 | MLA(hi, lo, (*fo)[4], -ptr[ 8]); | ||
638 | MLA(hi, lo, (*fo)[5], -ptr[ 6]); | ||
639 | MLA(hi, lo, (*fo)[6], -ptr[ 4]); | ||
640 | MLA(hi, lo, (*fo)[7], -ptr[ 2]); | ||
641 | |||
642 | *pcm1++ = SHIFT(MLZ(hi, lo)); | ||
643 | |||
644 | ptr = *Dptr - po; | ||
645 | ML0(hi, lo, (*fo)[7], ptr[31 - 2]); | ||
646 | MLA(hi, lo, (*fo)[6], ptr[31 - 4]); | ||
647 | MLA(hi, lo, (*fo)[5], ptr[31 - 6]); | ||
648 | MLA(hi, lo, (*fo)[4], ptr[31 - 8]); | ||
649 | MLA(hi, lo, (*fo)[3], ptr[31 - 10]); | ||
650 | MLA(hi, lo, (*fo)[2], ptr[31 - 12]); | ||
651 | MLA(hi, lo, (*fo)[1], ptr[31 - 14]); | ||
652 | MLA(hi, lo, (*fo)[0], ptr[31 - 16]); | ||
653 | |||
654 | ptr = *Dptr - pe; | ||
655 | MLA(hi, lo, (*fe)[0], ptr[31 - 16]); | ||
656 | MLA(hi, lo, (*fe)[1], ptr[31 - 14]); | ||
657 | MLA(hi, lo, (*fe)[2], ptr[31 - 12]); | ||
658 | MLA(hi, lo, (*fe)[3], ptr[31 - 10]); | ||
659 | MLA(hi, lo, (*fe)[4], ptr[31 - 8]); | ||
660 | MLA(hi, lo, (*fe)[5], ptr[31 - 6]); | ||
661 | MLA(hi, lo, (*fe)[6], ptr[31 - 4]); | ||
662 | MLA(hi, lo, (*fe)[7], ptr[31 - 2]); | ||
663 | |||
664 | *pcm2-- = SHIFT(MLZ(hi, lo)); | ||
665 | |||
666 | ++fo; | ||
667 | } | ||
668 | |||
669 | ++Dptr; | ||
670 | |||
671 | ptr = *Dptr + po; | ||
672 | ML0(hi, lo, (*fo)[0], ptr[ 0]); | ||
673 | MLA(hi, lo, (*fo)[1], ptr[14]); | ||
674 | MLA(hi, lo, (*fo)[2], ptr[12]); | ||
675 | MLA(hi, lo, (*fo)[3], ptr[10]); | ||
676 | MLA(hi, lo, (*fo)[4], ptr[ 8]); | ||
677 | MLA(hi, lo, (*fo)[5], ptr[ 6]); | ||
678 | MLA(hi, lo, (*fo)[6], ptr[ 4]); | ||
679 | MLA(hi, lo, (*fo)[7], ptr[ 2]); | ||
680 | |||
681 | *pcm1 = SHIFT(-MLZ(hi, lo)); | ||
682 | pcm1 += 16; | ||
683 | |||
684 | phase = (phase + 1) % 16; | ||
685 | } | ||
686 | } | ||
687 | } | ||
688 | # endif | ||
689 | |||
690 | /* | ||
691 | * NAME:synth->half() | ||
692 | * DESCRIPTION:perform half frequency PCM synthesis | ||
693 | */ | ||
694 | static | ||
695 | void synth_half(struct mad_synth *synth, struct mad_frame const *frame, | ||
696 | unsigned int nch, unsigned int ns) | ||
697 | { | ||
698 | unsigned int phase, ch, s, sb, pe, po; | ||
699 | mad_fixed_t *pcm1, *pcm2, (*filter)[2][2][16][8]; | ||
700 | mad_fixed_t const (*sbsample)[36][32]; | ||
701 | register mad_fixed_t (*fe)[8], (*fx)[8], (*fo)[8]; | ||
702 | register mad_fixed_t const (*Dptr)[32], *ptr; | ||
703 | register mad_fixed64hi_t hi; | ||
704 | register mad_fixed64lo_t lo; | ||
705 | |||
706 | for (ch = 0; ch < nch; ++ch) { | ||
707 | sbsample = &frame->sbsample[ch]; | ||
708 | filter = &synth->filter[ch]; | ||
709 | phase = synth->phase; | ||
710 | pcm1 = synth->pcm.samples[ch]; | ||
711 | |||
712 | for (s = 0; s < ns; ++s) { | ||
713 | dct32((*sbsample)[s], phase >> 1, | ||
714 | (*filter)[0][phase & 1], (*filter)[1][phase & 1]); | ||
715 | |||
716 | pe = phase & ~1; | ||
717 | po = ((phase - 1) & 0xf) | 1; | ||
718 | |||
719 | /* calculate 16 samples */ | ||
720 | |||
721 | fe = &(*filter)[0][ phase & 1][0]; | ||
722 | fx = &(*filter)[0][~phase & 1][0]; | ||
723 | fo = &(*filter)[1][~phase & 1][0]; | ||
724 | |||
725 | Dptr = &D[0]; | ||
726 | |||
727 | ptr = *Dptr + pe; | ||
728 | ML0(hi, lo, (*fe)[0], ptr[ 0]); | ||
729 | MLA(hi, lo, (*fe)[1], ptr[14]); | ||
730 | MLA(hi, lo, (*fe)[2], ptr[12]); | ||
731 | MLA(hi, lo, (*fe)[3], ptr[10]); | ||
732 | MLA(hi, lo, (*fe)[4], ptr[ 8]); | ||
733 | MLA(hi, lo, (*fe)[5], ptr[ 6]); | ||
734 | MLA(hi, lo, (*fe)[6], ptr[ 4]); | ||
735 | MLA(hi, lo, (*fe)[7], ptr[ 2]); | ||
736 | |||
737 | ptr = *Dptr + po; | ||
738 | MLA(hi, lo, (*fx)[0], -ptr[ 0]); | ||
739 | MLA(hi, lo, (*fx)[1], -ptr[14]); | ||
740 | MLA(hi, lo, (*fx)[2], -ptr[12]); | ||
741 | MLA(hi, lo, (*fx)[3], -ptr[10]); | ||
742 | MLA(hi, lo, (*fx)[4], -ptr[ 8]); | ||
743 | MLA(hi, lo, (*fx)[5], -ptr[ 6]); | ||
744 | MLA(hi, lo, (*fx)[6], -ptr[ 4]); | ||
745 | MLA(hi, lo, (*fx)[7], -ptr[ 2]); | ||
746 | |||
747 | *pcm1++ = SHIFT(MLZ(hi, lo)); | ||
748 | |||
749 | pcm2 = pcm1 + 14; | ||
750 | |||
751 | for (sb = 1; sb < 16; ++sb) { | ||
752 | ++fe; | ||
753 | ++Dptr; | ||
754 | |||
755 | /* D[32 - sb][i] == -D[sb][31 - i] */ | ||
756 | |||
757 | if (!(sb & 1)) { | ||
758 | ptr = *Dptr + pe; | ||
759 | ML0(hi, lo, (*fe)[7], ptr[ 2]); | ||
760 | MLA(hi, lo, (*fe)[6], ptr[ 4]); | ||
761 | MLA(hi, lo, (*fe)[5], ptr[ 6]); | ||
762 | MLA(hi, lo, (*fe)[4], ptr[ 8]); | ||
763 | MLA(hi, lo, (*fe)[3], ptr[10]); | ||
764 | MLA(hi, lo, (*fe)[2], ptr[12]); | ||
765 | MLA(hi, lo, (*fe)[1], ptr[14]); | ||
766 | MLA(hi, lo, (*fe)[0], ptr[ 0]); | ||
767 | |||
768 | ptr = *Dptr + po; | ||
769 | MLA(hi, lo, (*fo)[0], -ptr[ 0]); | ||
770 | MLA(hi, lo, (*fo)[1], -ptr[14]); | ||
771 | MLA(hi, lo, (*fo)[2], -ptr[12]); | ||
772 | MLA(hi, lo, (*fo)[3], -ptr[10]); | ||
773 | MLA(hi, lo, (*fo)[4], -ptr[ 8]); | ||
774 | MLA(hi, lo, (*fo)[5], -ptr[ 6]); | ||
775 | MLA(hi, lo, (*fo)[6], -ptr[ 4]); | ||
776 | MLA(hi, lo, (*fo)[7], -ptr[ 2]); | ||
777 | |||
778 | *pcm1++ = SHIFT(MLZ(hi, lo)); | ||
779 | |||
780 | ptr = *Dptr - po; | ||
781 | ML0(hi, lo, (*fo)[7], ptr[31 - 2]); | ||
782 | MLA(hi, lo, (*fo)[6], ptr[31 - 4]); | ||
783 | MLA(hi, lo, (*fo)[5], ptr[31 - 6]); | ||
784 | MLA(hi, lo, (*fo)[4], ptr[31 - 8]); | ||
785 | MLA(hi, lo, (*fo)[3], ptr[31 - 10]); | ||
786 | MLA(hi, lo, (*fo)[2], ptr[31 - 12]); | ||
787 | MLA(hi, lo, (*fo)[1], ptr[31 - 14]); | ||
788 | MLA(hi, lo, (*fo)[0], ptr[31 - 16]); | ||
789 | |||
790 | ptr = *Dptr - pe; | ||
791 | MLA(hi, lo, (*fe)[0], ptr[31 - 16]); | ||
792 | MLA(hi, lo, (*fe)[1], ptr[31 - 14]); | ||
793 | MLA(hi, lo, (*fe)[2], ptr[31 - 12]); | ||
794 | MLA(hi, lo, (*fe)[3], ptr[31 - 10]); | ||
795 | MLA(hi, lo, (*fe)[4], ptr[31 - 8]); | ||
796 | MLA(hi, lo, (*fe)[5], ptr[31 - 6]); | ||
797 | MLA(hi, lo, (*fe)[6], ptr[31 - 4]); | ||
798 | MLA(hi, lo, (*fe)[7], ptr[31 - 2]); | ||
799 | |||
800 | *pcm2-- = SHIFT(MLZ(hi, lo)); | ||
801 | } | ||
802 | |||
803 | ++fo; | ||
804 | } | ||
805 | |||
806 | ++Dptr; | ||
807 | |||
808 | ptr = *Dptr + po; | ||
809 | ML0(hi, lo, (*fo)[0], ptr[ 0]); | ||
810 | MLA(hi, lo, (*fo)[1], ptr[14]); | ||
811 | MLA(hi, lo, (*fo)[2], ptr[12]); | ||
812 | MLA(hi, lo, (*fo)[3], ptr[10]); | ||
813 | MLA(hi, lo, (*fo)[4], ptr[ 8]); | ||
814 | MLA(hi, lo, (*fo)[5], ptr[ 6]); | ||
815 | MLA(hi, lo, (*fo)[6], ptr[ 4]); | ||
816 | MLA(hi, lo, (*fo)[7], ptr[ 2]); | ||
817 | |||
818 | *pcm1 = SHIFT(-MLZ(hi, lo)); | ||
819 | pcm1 += 8; | ||
820 | |||
821 | phase = (phase + 1) % 16; | ||
822 | } | ||
823 | } | ||
824 | } | ||
825 | |||
826 | /* | ||
827 | * NAME:synth->frame() | ||
828 | * DESCRIPTION:perform PCM synthesis of frame subband samples | ||
829 | */ | ||
830 | void mad_synth_frame(struct mad_synth *synth, struct mad_frame const *frame) | ||
831 | { | ||
832 | unsigned int nch, ns; | ||
833 | void (*synth_frame)(struct mad_synth *, struct mad_frame const *, | ||
834 | unsigned int, unsigned int); | ||
835 | |||
836 | nch = MAD_NCHANNELS(&frame->header); | ||
837 | ns = MAD_NSBSAMPLES(&frame->header); | ||
838 | |||
839 | synth->pcm.samplerate = frame->header.samplerate; | ||
840 | synth->pcm.channels = nch; | ||
841 | synth->pcm.length = 32 * ns; | ||
842 | |||
843 | synth_frame = synth_full; | ||
844 | |||
845 | if (frame->options & MAD_OPTION_HALFSAMPLERATE) { | ||
846 | synth->pcm.samplerate /= 2; | ||
847 | synth->pcm.length /= 2; | ||
848 | |||
849 | synth_frame = synth_half; | ||
850 | } | ||
851 | |||
852 | synth_frame(synth, frame, nch, ns); | ||
853 | |||
854 | synth->phase = (synth->phase + ns) % 16; | ||
855 | } | ||