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MPEGPlayer: Fix leakage of file decriptors if file wasn't accepted by playback engine...
[kugel-rb.git] / apps / codecs / libmad / layer3.c
bloba598ff2c95f16e896bdc5c48a4299a5279e13a71
1 /*
2 * libmad - MPEG audio decoder library
3 * Copyright (C) 2000-2004 Underbit Technologies, Inc.
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 "config.h"
24 # endif
25
26 # include "global.h"
27
28 # include <string.h>
29
30 # ifdef HAVE_ASSERT_H
31 # include <assert.h>
32 # endif
33
34 # ifdef HAVE_LIMITS_H
35 # include <limits.h>
36 # else
37 # undef CHAR_BIT
38 # define CHAR_BIT 8
39 # endif
40
41 # include "fixed.h"
42 # include "bit.h"
43 # include "stream.h"
44 # include "frame.h"
45 # include "huffman.h"
46 # include "layer3.h"
47
48 /* depending on the cpu "leftshift32" may be supported or not */
49 # if defined(CPU_COLDFIRE)
50 #define MAXLSHIFT 32
51 #else
52 #define MAXLSHIFT 31
53 #endif
54
55 /* --- Layer III ----------------------------------------------------------- */
56
57 enum {
58 count1table_select = 0x01,
59 scalefac_scale = 0x02,
60 preflag = 0x04,
61 mixed_block_flag = 0x08
62 };
63
64 enum {
65 I_STEREO = 0x1,
66 MS_STEREO = 0x2
67 };
68
69 struct sideinfo {
70 unsigned int main_data_begin;
71 unsigned int private_bits;
72
73 unsigned char scfsi[2];
74
75 struct granule {
76 struct channel {
77 /* from side info */
78 unsigned short part2_3_length;
79 unsigned short big_values;
80 unsigned short global_gain;
81 unsigned short scalefac_compress;
82
83 unsigned char flags;
84 unsigned char block_type;
85 unsigned char table_select[3];
86 unsigned char subblock_gain[3];
87 unsigned char region0_count;
88 unsigned char region1_count;
89
90 /* from main_data */
91 unsigned char scalefac[39]; /* scalefac_l and/or scalefac_s */
92 } ch[2];
93 } gr[2];
94 };
95
96 /*
97 * scalefactor bit lengths
98 * derived from section 2.4.2.7 of ISO/IEC 11172-3
99 */
100 static
101 struct {
102 unsigned char slen1;
103 unsigned char slen2;
104 } const sflen_table[16] = {
105 { 0, 0 }, { 0, 1 }, { 0, 2 }, { 0, 3 },
106 { 3, 0 }, { 1, 1 }, { 1, 2 }, { 1, 3 },
107 { 2, 1 }, { 2, 2 }, { 2, 3 }, { 3, 1 },
108 { 3, 2 }, { 3, 3 }, { 4, 2 }, { 4, 3 }
109 };
110
111 /*
112 * number of LSF scalefactor band values
113 * derived from section 2.4.3.2 of ISO/IEC 13818-3
114 */
115 static
116 unsigned char const nsfb_table[6][3][4] = {
117 { { 6, 5, 5, 5 },
118 { 9, 9, 9, 9 },
119 { 6, 9, 9, 9 } },
120
121 { { 6, 5, 7, 3 },
122 { 9, 9, 12, 6 },
123 { 6, 9, 12, 6 } },
124
125 { { 11, 10, 0, 0 },
126 { 18, 18, 0, 0 },
127 { 15, 18, 0, 0 } },
128
129 { { 7, 7, 7, 0 },
130 { 12, 12, 12, 0 },
131 { 6, 15, 12, 0 } },
132
133 { { 6, 6, 6, 3 },
134 { 12, 9, 9, 6 },
135 { 6, 12, 9, 6 } },
136
137 { { 8, 8, 5, 0 },
138 { 15, 12, 9, 0 },
139 { 6, 18, 9, 0 } }
140 };
141
142 /*
143 * MPEG-1 scalefactor band widths
144 * derived from Table B.8 of ISO/IEC 11172-3
145 */
146 static
147 unsigned char const sfb_48000_long[] = {
148 4, 4, 4, 4, 4, 4, 6, 6, 6, 8, 10,
149 12, 16, 18, 22, 28, 34, 40, 46, 54, 54, 192
150 };
151
152 static
153 unsigned char const sfb_44100_long[] = {
154 4, 4, 4, 4, 4, 4, 6, 6, 8, 8, 10,
155 12, 16, 20, 24, 28, 34, 42, 50, 54, 76, 158
156 };
157
158 static
159 unsigned char const sfb_32000_long[] = {
160 4, 4, 4, 4, 4, 4, 6, 6, 8, 10, 12,
161 16, 20, 24, 30, 38, 46, 56, 68, 84, 102, 26
162 };
163
164 static
165 unsigned char const sfb_48000_short[] = {
166 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 6,
167 6, 6, 6, 6, 6, 10, 10, 10, 12, 12, 12, 14, 14,
168 14, 16, 16, 16, 20, 20, 20, 26, 26, 26, 66, 66, 66
169 };
170
171 static
172 unsigned char const sfb_44100_short[] = {
173 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 6,
174 6, 6, 8, 8, 8, 10, 10, 10, 12, 12, 12, 14, 14,
175 14, 18, 18, 18, 22, 22, 22, 30, 30, 30, 56, 56, 56
176 };
177
178 static
179 unsigned char const sfb_32000_short[] = {
180 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 6,
181 6, 6, 8, 8, 8, 12, 12, 12, 16, 16, 16, 20, 20,
182 20, 26, 26, 26, 34, 34, 34, 42, 42, 42, 12, 12, 12
183 };
184
185 static
186 unsigned char const sfb_48000_mixed[] = {
187 /* long */ 4, 4, 4, 4, 4, 4, 6, 6,
188 /* short */ 4, 4, 4, 6, 6, 6, 6, 6, 6, 10,
189 10, 10, 12, 12, 12, 14, 14, 14, 16, 16,
190 16, 20, 20, 20, 26, 26, 26, 66, 66, 66
191 };
192
193 static
194 unsigned char const sfb_44100_mixed[] = {
195 /* long */ 4, 4, 4, 4, 4, 4, 6, 6,
196 /* short */ 4, 4, 4, 6, 6, 6, 8, 8, 8, 10,
197 10, 10, 12, 12, 12, 14, 14, 14, 18, 18,
198 18, 22, 22, 22, 30, 30, 30, 56, 56, 56
199 };
200
201 static
202 unsigned char const sfb_32000_mixed[] = {
203 /* long */ 4, 4, 4, 4, 4, 4, 6, 6,
204 /* short */ 4, 4, 4, 6, 6, 6, 8, 8, 8, 12,
205 12, 12, 16, 16, 16, 20, 20, 20, 26, 26,
206 26, 34, 34, 34, 42, 42, 42, 12, 12, 12
207 };
208
209 /*
210 * MPEG-2 scalefactor band widths
211 * derived from Table B.2 of ISO/IEC 13818-3
212 */
213 static
214 unsigned char const sfb_24000_long[] = {
215 6, 6, 6, 6, 6, 6, 8, 10, 12, 14, 16,
216 18, 22, 26, 32, 38, 46, 54, 62, 70, 76, 36
217 };
218
219 static
220 unsigned char const sfb_22050_long[] = {
221 6, 6, 6, 6, 6, 6, 8, 10, 12, 14, 16,
222 20, 24, 28, 32, 38, 46, 52, 60, 68, 58, 54
223 };
224
225 # define sfb_16000_long sfb_22050_long
226
227 static
228 unsigned char const sfb_24000_short[] = {
229 4, 4, 4, 4, 4, 4, 4, 4, 4, 6, 6, 6, 8,
230 8, 8, 10, 10, 10, 12, 12, 12, 14, 14, 14, 18, 18,
231 18, 24, 24, 24, 32, 32, 32, 44, 44, 44, 12, 12, 12
232 };
233
234 static
235 unsigned char const sfb_22050_short[] = {
236 4, 4, 4, 4, 4, 4, 4, 4, 4, 6, 6, 6, 6,
237 6, 6, 8, 8, 8, 10, 10, 10, 14, 14, 14, 18, 18,
238 18, 26, 26, 26, 32, 32, 32, 42, 42, 42, 18, 18, 18
239 };
240
241 static
242 unsigned char const sfb_16000_short[] = {
243 4, 4, 4, 4, 4, 4, 4, 4, 4, 6, 6, 6, 8,
244 8, 8, 10, 10, 10, 12, 12, 12, 14, 14, 14, 18, 18,
245 18, 24, 24, 24, 30, 30, 30, 40, 40, 40, 18, 18, 18
246 };
247
248 static
249 unsigned char const sfb_24000_mixed[] = {
250 /* long */ 6, 6, 6, 6, 6, 6,
251 /* short */ 6, 6, 6, 8, 8, 8, 10, 10, 10, 12,
252 12, 12, 14, 14, 14, 18, 18, 18, 24, 24,
253 24, 32, 32, 32, 44, 44, 44, 12, 12, 12
254 };
255
256 static
257 unsigned char const sfb_22050_mixed[] = {
258 /* long */ 6, 6, 6, 6, 6, 6,
259 /* short */ 6, 6, 6, 6, 6, 6, 8, 8, 8, 10,
260 10, 10, 14, 14, 14, 18, 18, 18, 26, 26,
261 26, 32, 32, 32, 42, 42, 42, 18, 18, 18
262 };
263
264 static
265 unsigned char const sfb_16000_mixed[] = {
266 /* long */ 6, 6, 6, 6, 6, 6,
267 /* short */ 6, 6, 6, 8, 8, 8, 10, 10, 10, 12,
268 12, 12, 14, 14, 14, 18, 18, 18, 24, 24,
269 24, 30, 30, 30, 40, 40, 40, 18, 18, 18
270 };
271
272 /*
273 * MPEG 2.5 scalefactor band widths
274 * derived from public sources
275 */
276 # define sfb_12000_long sfb_16000_long
277 # define sfb_11025_long sfb_12000_long
278
279 static
280 unsigned char const sfb_8000_long[] = {
281 12, 12, 12, 12, 12, 12, 16, 20, 24, 28, 32,
282 40, 48, 56, 64, 76, 90, 2, 2, 2, 2, 2
283 };
284
285 # define sfb_12000_short sfb_16000_short
286 # define sfb_11025_short sfb_12000_short
287
288 static
289 unsigned char const sfb_8000_short[] = {
290 8, 8, 8, 8, 8, 8, 8, 8, 8, 12, 12, 12, 16,
291 16, 16, 20, 20, 20, 24, 24, 24, 28, 28, 28, 36, 36,
292 36, 2, 2, 2, 2, 2, 2, 2, 2, 2, 26, 26, 26
293 };
294
295 # define sfb_12000_mixed sfb_16000_mixed
296 # define sfb_11025_mixed sfb_12000_mixed
297
298 /* the 8000 Hz short block scalefactor bands do not break after
299 the first 36 frequency lines, so this is probably wrong */
300 static
301 unsigned char const sfb_8000_mixed[] = {
302 /* long */ 12, 12, 12,
303 /* short */ 4, 4, 4, 8, 8, 8, 12, 12, 12, 16, 16, 16,
304 20, 20, 20, 24, 24, 24, 28, 28, 28, 36, 36, 36,
305 2, 2, 2, 2, 2, 2, 2, 2, 2, 26, 26, 26
306 };
307
308 static
309 struct {
310 unsigned char const *l;
311 unsigned char const *s;
312 unsigned char const *m;
313 } const sfbwidth_table[9] = {
314 { sfb_48000_long, sfb_48000_short, sfb_48000_mixed },
315 { sfb_44100_long, sfb_44100_short, sfb_44100_mixed },
316 { sfb_32000_long, sfb_32000_short, sfb_32000_mixed },
317 { sfb_24000_long, sfb_24000_short, sfb_24000_mixed },
318 { sfb_22050_long, sfb_22050_short, sfb_22050_mixed },
319 { sfb_16000_long, sfb_16000_short, sfb_16000_mixed },
320 { sfb_12000_long, sfb_12000_short, sfb_12000_mixed },
321 { sfb_11025_long, sfb_11025_short, sfb_11025_mixed },
322 { sfb_8000_long, sfb_8000_short, sfb_8000_mixed }
323 };
324
325 /*
326 * scalefactor band preemphasis (used only when preflag is set)
327 * derived from Table B.6 of ISO/IEC 11172-3
328 */
329 static
330 unsigned char const pretab[22] = {
331 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 3, 3, 3, 2, 0
332 };
333
334 /*
335 * table for requantization
336 *
337 * rq_table[x].mantissa * 2^(rq_table[x].exponent) = x^(4/3)
338 *
339 * format rq_table: bit31-27=exponent bit26-0=mantissa
340 */
341 static
342 unsigned long const rq_table[8207] = {
343 # include "rq_table.dat"
344 };
345
346 /*
347 * fractional powers of two
348 * used for requantization and joint stereo decoding
349 *
350 * root_table[3 + x] = 2^(x/4)
351 */
352 mad_fixed_t const root_table[7] ICONST_ATTR MEM_ALIGN_ATTR = {
353 MAD_F(0x09837f05) /* 2^(-3/4) == 0.59460355750136 */,
354 MAD_F(0x0b504f33) /* 2^(-2/4) == 0.70710678118655 */,
355 MAD_F(0x0d744fcd) /* 2^(-1/4) == 0.84089641525371 */,
356 MAD_F(0x10000000) /* 2^( 0/4) == 1.00000000000000 */,
357 MAD_F(0x1306fe0a) /* 2^(+1/4) == 1.18920711500272 */,
358 MAD_F(0x16a09e66) /* 2^(+2/4) == 1.41421356237310 */,
359 MAD_F(0x1ae89f99) /* 2^(+3/4) == 1.68179283050743 */
360 };
361
362 /*
363 * coefficients for aliasing reduction
364 * derived from Table B.9 of ISO/IEC 11172-3
365 *
366 * c[] = { -0.6, -0.535, -0.33, -0.185, -0.095, -0.041, -0.0142, -0.0037 }
367 * cs[i] = 1 / sqrt(1 + c[i]^2)
368 * ca[i] = c[i] / sqrt(1 + c[i]^2)
369 */
370 mad_fixed_t const cs[8] ICONST_ATTR MEM_ALIGN_ATTR = {
371 +MAD_F(0x0db84a81) /* +0.857492926 */, +MAD_F(0x0e1b9d7f) /* +0.881741997 */,
372 +MAD_F(0x0f31adcf) /* +0.949628649 */, +MAD_F(0x0fbba815) /* +0.983314592 */,
373 +MAD_F(0x0feda417) /* +0.995517816 */, +MAD_F(0x0ffc8fc8) /* +0.999160558 */,
374 +MAD_F(0x0fff964c) /* +0.999899195 */, +MAD_F(0x0ffff8d3) /* +0.999993155 */
375 };
376
377 mad_fixed_t const ca[8] ICONST_ATTR MEM_ALIGN_ATTR = {
378 -MAD_F(0x083b5fe7) /* -0.514495755 */, -MAD_F(0x078c36d2) /* -0.471731969 */,
379 -MAD_F(0x05039814) /* -0.313377454 */, -MAD_F(0x02e91dd1) /* -0.181913200 */,
380 -MAD_F(0x0183603a) /* -0.094574193 */, -MAD_F(0x00a7cb87) /* -0.040965583 */,
381 -MAD_F(0x003a2847) /* -0.014198569 */, -MAD_F(0x000f27b4) /* -0.003699975 */
382 };
383
384 /*
385 * IMDCT coefficients for short blocks
386 * derived from section 2.4.3.4.10.2 of ISO/IEC 11172-3
387 *
388 * imdct_s[i/even][k] = cos((PI / 24) * (2 * (i / 2) + 7) * (2 * k + 1))
389 * imdct_s[i /odd][k] = cos((PI / 24) * (2 * (6 + (i-1)/2) + 7) * (2 * k + 1))
390 */
391 mad_fixed_t const imdct_s[6][6] ICONST_ATTR MEM_ALIGN_ATTR = {
392 # include "imdct_s.dat"
393 };
394
395 # if !defined(FPM_ARM)
396 /*
397 * windowing coefficients for long blocks
398 * derived from section 2.4.3.4.10.3 of ISO/IEC 11172-3
399 *
400 * window_l[i] = sin((PI / 36) * (i + 1/2))
401 */
402 static
403 mad_fixed_t const window_l[36] ICONST_ATTR MEM_ALIGN_ATTR = {
404 MAD_F(0x00b2aa3e) /* 0.043619387 */, MAD_F(0x0216a2a2) /* 0.130526192 */,
405 MAD_F(0x03768962) /* 0.216439614 */, MAD_F(0x04cfb0e2) /* 0.300705800 */,
406 MAD_F(0x061f78aa) /* 0.382683432 */, MAD_F(0x07635284) /* 0.461748613 */,
407 MAD_F(0x0898c779) /* 0.537299608 */, MAD_F(0x09bd7ca0) /* 0.608761429 */,
408 MAD_F(0x0acf37ad) /* 0.675590208 */, MAD_F(0x0bcbe352) /* 0.737277337 */,
409 MAD_F(0x0cb19346) /* 0.793353340 */, MAD_F(0x0d7e8807) /* 0.843391446 */,
410
411 MAD_F(0x0e313245) /* 0.887010833 */, MAD_F(0x0ec835e8) /* 0.923879533 */,
412 MAD_F(0x0f426cb5) /* 0.953716951 */, MAD_F(0x0f9ee890) /* 0.976296007 */,
413 MAD_F(0x0fdcf549) /* 0.991444861 */, MAD_F(0x0ffc19fd) /* 0.999048222 */,
414 MAD_F(0x0ffc19fd) /* 0.999048222 */, MAD_F(0x0fdcf549) /* 0.991444861 */,
415 MAD_F(0x0f9ee890) /* 0.976296007 */, MAD_F(0x0f426cb5) /* 0.953716951 */,
416 MAD_F(0x0ec835e8) /* 0.923879533 */, MAD_F(0x0e313245) /* 0.887010833 */,
417
418 MAD_F(0x0d7e8807) /* 0.843391446 */, MAD_F(0x0cb19346) /* 0.793353340 */,
419 MAD_F(0x0bcbe352) /* 0.737277337 */, MAD_F(0x0acf37ad) /* 0.675590208 */,
420 MAD_F(0x09bd7ca0) /* 0.608761429 */, MAD_F(0x0898c779) /* 0.537299608 */,
421 MAD_F(0x07635284) /* 0.461748613 */, MAD_F(0x061f78aa) /* 0.382683432 */,
422 MAD_F(0x04cfb0e2) /* 0.300705800 */, MAD_F(0x03768962) /* 0.216439614 */,
423 MAD_F(0x0216a2a2) /* 0.130526192 */, MAD_F(0x00b2aa3e) /* 0.043619387 */,
424 };
425 # endif /* FPM_ARM */
426
427 /*
428 * windowing coefficients for short blocks
429 * derived from section 2.4.3.4.10.3 of ISO/IEC 11172-3
430 *
431 * window_s[i] = sin((PI / 12) * (i + 1/2))
432 */
433 mad_fixed_t const window_s[12] ICONST_ATTR MEM_ALIGN_ATTR = {
434 MAD_F(0x0216a2a2) /* 0.130526192 */, MAD_F(0x061f78aa) /* 0.382683432 */,
435 MAD_F(0x09bd7ca0) /* 0.608761429 */, MAD_F(0x0cb19346) /* 0.793353340 */,
436 MAD_F(0x0ec835e8) /* 0.923879533 */, MAD_F(0x0fdcf549) /* 0.991444861 */,
437 MAD_F(0x0fdcf549) /* 0.991444861 */, MAD_F(0x0ec835e8) /* 0.923879533 */,
438 MAD_F(0x0cb19346) /* 0.793353340 */, MAD_F(0x09bd7ca0) /* 0.608761429 */,
439 MAD_F(0x061f78aa) /* 0.382683432 */, MAD_F(0x0216a2a2) /* 0.130526192 */,
440 };
441
442 /*
443 * coefficients for intensity stereo processing
444 * derived from section 2.4.3.4.9.3 of ISO/IEC 11172-3
445 *
446 * is_ratio[i] = tan(i * (PI / 12))
447 * is_table[i] = is_ratio[i] / (1 + is_ratio[i])
448 */
449 static
450 mad_fixed_t const is_table[7] = {
451 MAD_F(0x00000000) /* 0.000000000 */,
452 MAD_F(0x0361962f) /* 0.211324865 */,
453 MAD_F(0x05db3d74) /* 0.366025404 */,
454 MAD_F(0x08000000) /* 0.500000000 */,
455 MAD_F(0x0a24c28c) /* 0.633974596 */,
456 MAD_F(0x0c9e69d1) /* 0.788675135 */,
457 MAD_F(0x10000000) /* 1.000000000 */
458 };
459
460 /*
461 * coefficients for LSF intensity stereo processing
462 * derived from section 2.4.3.2 of ISO/IEC 13818-3
463 *
464 * is_lsf_table[0][i] = (1 / sqrt(sqrt(2)))^(i + 1)
465 * is_lsf_table[1][i] = (1 / sqrt(2)) ^(i + 1)
466 */
467 static
468 mad_fixed_t const is_lsf_table[2][15] = {
469 {
470 MAD_F(0x0d744fcd) /* 0.840896415 */,
471 MAD_F(0x0b504f33) /* 0.707106781 */,
472 MAD_F(0x09837f05) /* 0.594603558 */,
473 MAD_F(0x08000000) /* 0.500000000 */,
474 MAD_F(0x06ba27e6) /* 0.420448208 */,
475 MAD_F(0x05a8279a) /* 0.353553391 */,
476 MAD_F(0x04c1bf83) /* 0.297301779 */,
477 MAD_F(0x04000000) /* 0.250000000 */,
478 MAD_F(0x035d13f3) /* 0.210224104 */,
479 MAD_F(0x02d413cd) /* 0.176776695 */,
480 MAD_F(0x0260dfc1) /* 0.148650889 */,
481 MAD_F(0x02000000) /* 0.125000000 */,
482 MAD_F(0x01ae89fa) /* 0.105112052 */,
483 MAD_F(0x016a09e6) /* 0.088388348 */,
484 MAD_F(0x01306fe1) /* 0.074325445 */
485 }, {
486 MAD_F(0x0b504f33) /* 0.707106781 */,
487 MAD_F(0x08000000) /* 0.500000000 */,
488 MAD_F(0x05a8279a) /* 0.353553391 */,
489 MAD_F(0x04000000) /* 0.250000000 */,
490 MAD_F(0x02d413cd) /* 0.176776695 */,
491 MAD_F(0x02000000) /* 0.125000000 */,
492 MAD_F(0x016a09e6) /* 0.088388348 */,
493 MAD_F(0x01000000) /* 0.062500000 */,
494 MAD_F(0x00b504f3) /* 0.044194174 */,
495 MAD_F(0x00800000) /* 0.031250000 */,
496 MAD_F(0x005a827a) /* 0.022097087 */,
497 MAD_F(0x00400000) /* 0.015625000 */,
498 MAD_F(0x002d413d) /* 0.011048543 */,
499 MAD_F(0x00200000) /* 0.007812500 */,
500 MAD_F(0x0016a09e) /* 0.005524272 */
501 }
502 };
503
504 /*
505 * NAME: III_sideinfo()
506 * DESCRIPTION: decode frame side information from a bitstream
507 */
508 static
509 enum mad_error III_sideinfo(struct mad_bitptr *ptr, unsigned int nch,
510 int lsf, struct sideinfo *si,
511 unsigned int *data_bitlen,
512 unsigned int *priv_bitlen)
513 {
514 unsigned int ngr, gr, ch, i;
515 enum mad_error result = MAD_ERROR_NONE;
516
517 *data_bitlen = 0;
518 *priv_bitlen = lsf ? ((nch == 1) ? 1 : 2) : ((nch == 1) ? 5 : 3);
519
520 si->main_data_begin = mad_bit_read(ptr, lsf ? 8 : 9);
521 si->private_bits = mad_bit_read(ptr, *priv_bitlen);
522
523 ngr = 1;
524 if (!lsf) {
525 ngr = 2;
526
527 for (ch = 0; ch < nch; ++ch)
528 si->scfsi[ch] = mad_bit_read(ptr, 4);
529 }
530
531 for (gr = 0; gr < ngr; ++gr) {
532 struct granule *granule = &si->gr[gr];
533
534 for (ch = 0; ch < nch; ++ch) {
535 struct channel *channel = &granule->ch[ch];
536
537 channel->part2_3_length = mad_bit_read(ptr, 12);
538 channel->big_values = mad_bit_read(ptr, 9);
539 channel->global_gain = mad_bit_read(ptr, 8);
540 channel->scalefac_compress = mad_bit_read(ptr, lsf ? 9 : 4);
541
542 *data_bitlen += channel->part2_3_length;
543
544 if (channel->big_values > 288 && result == 0)
545 result = MAD_ERROR_BADBIGVALUES;
546
547 channel->flags = 0;
548
549 /* window_switching_flag */
550 if (mad_bit_read(ptr, 1)) {
551 channel->block_type = mad_bit_read(ptr, 2);
552
553 if (channel->block_type == 0 && result == 0)
554 result = MAD_ERROR_BADBLOCKTYPE;
555
556 if (!lsf && channel->block_type == 2 && si->scfsi[ch] && result == 0)
557 result = MAD_ERROR_BADSCFSI;
558
559 channel->region0_count = 7;
560 channel->region1_count = 36;
561
562 if (mad_bit_read(ptr, 1))
563 channel->flags |= mixed_block_flag;
564 else if (channel->block_type == 2)
565 channel->region0_count = 8;
566
567 for (i = 0; i < 2; ++i)
568 channel->table_select[i] = mad_bit_read(ptr, 5);
569
570 # if defined(DEBUG)
571 channel->table_select[2] = 4; /* not used */
572 # endif
573
574 for (i = 0; i < 3; ++i)
575 channel->subblock_gain[i] = mad_bit_read(ptr, 3);
576 }
577 else {
578 channel->block_type = 0;
579
580 for (i = 0; i < 3; ++i)
581 channel->table_select[i] = mad_bit_read(ptr, 5);
582
583 channel->region0_count = mad_bit_read(ptr, 4);
584 channel->region1_count = mad_bit_read(ptr, 3);
585 }
586
587 /* [preflag,] scalefac_scale, count1table_select */
588 channel->flags |= mad_bit_read(ptr, lsf ? 2 : 3);
589 }
590 }
591
592 return result;
593 }
594
595 /*
596 * NAME: III_scalefactors_lsf()
597 * DESCRIPTION: decode channel scalefactors for LSF from a bitstream
598 */
599 static
600 unsigned int III_scalefactors_lsf(struct mad_bitptr *ptr,
601 struct channel *channel,
602 struct channel *gr1ch, int mode_extension)
603 {
604 struct mad_bitptr start;
605 unsigned int scalefac_compress, index, slen[4], part, n, i;
606 unsigned char const *nsfb;
607
608 start = *ptr;
609
610 scalefac_compress = channel->scalefac_compress;
611 index = (channel->block_type == 2) ?
612 ((channel->flags & mixed_block_flag) ? 2 : 1) : 0;
613
614 if (!((mode_extension & I_STEREO) && gr1ch)) {
615 if (scalefac_compress < 400) {
616 slen[0] = (scalefac_compress >> 4) / 5;
617 slen[1] = (scalefac_compress >> 4) % 5;
618 slen[2] = (scalefac_compress % 16) >> 2;
619 slen[3] = scalefac_compress % 4;
620
621 nsfb = nsfb_table[0][index];
622 }
623 else if (scalefac_compress < 500) {
624 scalefac_compress -= 400;
625
626 slen[0] = (scalefac_compress >> 2) / 5;
627 slen[1] = (scalefac_compress >> 2) % 5;
628 slen[2] = scalefac_compress % 4;
629 slen[3] = 0;
630
631 nsfb = nsfb_table[1][index];
632 }
633 else {
634 scalefac_compress -= 500;
635
636 slen[0] = scalefac_compress / 3;
637 slen[1] = scalefac_compress % 3;
638 slen[2] = 0;
639 slen[3] = 0;
640
641 channel->flags |= preflag;
642
643 nsfb = nsfb_table[2][index];
644 }
645
646 n = 0;
647 for (part = 0; part < 4; ++part) {
648 for (i = 0; i < nsfb[part]; ++i)
649 channel->scalefac[n++] = mad_bit_read(ptr, slen[part]);
650 }
651
652 while (n < 39)
653 channel->scalefac[n++] = 0;
654 }
655 else { /* (mode_extension & I_STEREO) && gr1ch (i.e. ch == 1) */
656 scalefac_compress >>= 1;
657
658 if (scalefac_compress < 180) {
659 slen[0] = scalefac_compress / 36;
660 slen[1] = (scalefac_compress % 36) / 6;
661 slen[2] = (scalefac_compress % 36) % 6;
662 slen[3] = 0;
663
664 nsfb = nsfb_table[3][index];
665 }
666 else if (scalefac_compress < 244) {
667 scalefac_compress -= 180;
668
669 slen[0] = (scalefac_compress % 64) >> 4;
670 slen[1] = (scalefac_compress % 16) >> 2;
671 slen[2] = scalefac_compress % 4;
672 slen[3] = 0;
673
674 nsfb = nsfb_table[4][index];
675 }
676 else {
677 scalefac_compress -= 244;
678
679 slen[0] = scalefac_compress / 3;
680 slen[1] = scalefac_compress % 3;
681 slen[2] = 0;
682 slen[3] = 0;
683
684 nsfb = nsfb_table[5][index];
685 }
686
687 n = 0;
688 for (part = 0; part < 4; ++part) {
689 unsigned int max, is_pos;
690
691 max = (1 << slen[part]) - 1;
692
693 for (i = 0; i < nsfb[part]; ++i) {
694 is_pos = mad_bit_read(ptr, slen[part]);
695
696 channel->scalefac[n] = is_pos;
697 gr1ch->scalefac[n++] = (is_pos == max);
698 }
699 }
700
701 while (n < 39) {
702 channel->scalefac[n] = 0;
703 gr1ch->scalefac[n++] = 0; /* apparently not illegal */
704 }
705 }
706
707 return mad_bit_length(&start, ptr);
708 }
709
710 /*
711 * NAME: III_scalefactors()
712 * DESCRIPTION: decode channel scalefactors of one granule from a bitstream
713 */
714 static
715 unsigned int III_scalefactors(struct mad_bitptr *ptr, struct channel *channel,
716 struct channel const *gr0ch, unsigned int scfsi)
717 {
718 struct mad_bitptr start;
719 unsigned int slen1, slen2, sfbi;
720
721 start = *ptr;
722
723 slen1 = sflen_table[channel->scalefac_compress].slen1;
724 slen2 = sflen_table[channel->scalefac_compress].slen2;
725
726 if (channel->block_type == 2) {
727 unsigned int nsfb;
728
729 sfbi = 0;
730
731 nsfb = (channel->flags & mixed_block_flag) ? 8 + 3 * 3 : 6 * 3;
732 while (nsfb--)
733 channel->scalefac[sfbi++] = mad_bit_read(ptr, slen1);
734
735 nsfb = 6 * 3;
736 while (nsfb--)
737 channel->scalefac[sfbi++] = mad_bit_read(ptr, slen2);
738
739 nsfb = 1 * 3;
740 while (nsfb--)
741 channel->scalefac[sfbi++] = 0;
742 }
743 else { /* channel->block_type != 2 */
744 if (scfsi & 0x8) {
745 for (sfbi = 0; sfbi < 6; ++sfbi)
746 channel->scalefac[sfbi] = gr0ch->scalefac[sfbi];
747 }
748 else {
749 for (sfbi = 0; sfbi < 6; ++sfbi)
750 channel->scalefac[sfbi] = mad_bit_read(ptr, slen1);
751 }
752
753 if (scfsi & 0x4) {
754 for (sfbi = 6; sfbi < 11; ++sfbi)
755 channel->scalefac[sfbi] = gr0ch->scalefac[sfbi];
756 }
757 else {
758 for (sfbi = 6; sfbi < 11; ++sfbi)
759 channel->scalefac[sfbi] = mad_bit_read(ptr, slen1);
760 }
761
762 if (scfsi & 0x2) {
763 for (sfbi = 11; sfbi < 16; ++sfbi)
764 channel->scalefac[sfbi] = gr0ch->scalefac[sfbi];
765 }
766 else {
767 for (sfbi = 11; sfbi < 16; ++sfbi)
768 channel->scalefac[sfbi] = mad_bit_read(ptr, slen2);
769 }
770
771 if (scfsi & 0x1) {
772 for (sfbi = 16; sfbi < 21; ++sfbi)
773 channel->scalefac[sfbi] = gr0ch->scalefac[sfbi];
774 }
775 else {
776 for (sfbi = 16; sfbi < 21; ++sfbi)
777 channel->scalefac[sfbi] = mad_bit_read(ptr, slen2);
778 }
779
780 channel->scalefac[21] = 0;
781 }
782
783 return mad_bit_length(&start, ptr);
784 }
785
786 /*
787 * The Layer III formula for requantization and scaling is defined by
788 * section 2.4.3.4.7.1 of ISO/IEC 11172-3, as follows:
789 *
790 * long blocks:
791 * xr[i] = sign(is[i]) * abs(is[i])^(4/3) *
792 * 2^((1/4) * (global_gain - 210)) *
793 * 2^-(scalefac_multiplier *
794 * (scalefac_l[sfb] + preflag * pretab[sfb]))
795 *
796 * short blocks:
797 * xr[i] = sign(is[i]) * abs(is[i])^(4/3) *
798 * 2^((1/4) * (global_gain - 210 - 8 * subblock_gain[w])) *
799 * 2^-(scalefac_multiplier * scalefac_s[sfb][w])
800 *
801 * where:
802 * scalefac_multiplier = (scalefac_scale + 1) / 2
803 *
804 * The routines III_exponents() and III_requantize() facilitate this
805 * calculation.
806 */
807
808 /*
809 * NAME: III_exponents()
810 * DESCRIPTION: calculate scalefactor exponents
811 */
812 static
813 void III_exponents(struct channel const *channel,
814 unsigned char const *sfbwidth, signed int exponents[39])
815 {
816 signed int gain;
817 unsigned int scalefac_multiplier, sfbi;
818
819 gain = (signed int) channel->global_gain - 210;
820 scalefac_multiplier = (channel->flags & scalefac_scale) ? 2 : 1;
821
822 if (channel->block_type == 2) {
823 unsigned int l;
824 signed int gain0, gain1, gain2;
825
826 sfbi = l = 0;
827
828 if (channel->flags & mixed_block_flag) {
829 unsigned int premask;
830
831 premask = (channel->flags & preflag) ? ~0 : 0;
832
833 /* long block subbands 0-1 */
834
835 while (l < 36) {
836 exponents[sfbi] = gain -
837 (signed int) ((channel->scalefac[sfbi] + (pretab[sfbi] & premask)) <<
838 scalefac_multiplier);
839
840 l += sfbwidth[sfbi++];
841 }
842 }
843
844 /* this is probably wrong for 8000 Hz short/mixed blocks */
845
846 gain0 = gain - 8 * (signed int) channel->subblock_gain[0];
847 gain1 = gain - 8 * (signed int) channel->subblock_gain[1];
848 gain2 = gain - 8 * (signed int) channel->subblock_gain[2];
849
850 while (l < 576) {
851 exponents[sfbi + 0] = gain0 -
852 (signed int) (channel->scalefac[sfbi + 0] << scalefac_multiplier);
853 exponents[sfbi + 1] = gain1 -
854 (signed int) (channel->scalefac[sfbi + 1] << scalefac_multiplier);
855 exponents[sfbi + 2] = gain2 -
856 (signed int) (channel->scalefac[sfbi + 2] << scalefac_multiplier);
857 unsigned int w = sfbwidth[sfbi];
858 l += 3 * w;
859 sfbi += 3;
860 }
861 }
862 else { /* channel->block_type != 2 */
863 if (channel->flags & preflag) {
864 for (sfbi = 0; sfbi < 22; ++sfbi) {
865 exponents[sfbi] = gain -
866 (signed int) ((channel->scalefac[sfbi] + pretab[sfbi]) <<
867 scalefac_multiplier);
868 }
869 }
870 else {
871 for (sfbi = 0; sfbi < 22; ++sfbi) {
872 exponents[sfbi] = gain -
873 (signed int) (channel->scalefac[sfbi] << scalefac_multiplier);
874 }
875 }
876 }
877 }
878
879 /*
880 * NAME: III_requantize()
881 * DESCRIPTION: requantize one (positive) value
882 */
883 static
884 mad_fixed_t III_requantize(unsigned int value, signed int exp)
885 {
886 mad_fixed_t requantized;
887 signed int frac;
888 unsigned long power;
889
890 frac = exp % 4; /* assumes sign(frac) == sign(exp) */
891 exp /= 4;
892
893 /* format rq_table: bit31-27=exponent bit26-0=mantissa */
894 power = rq_table[value];
895 requantized = power & 0x07ffffff;
896 exp += power >> 27;
897
898 if (exp < 0) {
899 if (-exp >= (signed int) (sizeof(mad_fixed_t) * CHAR_BIT)) {
900 /* underflow */
901 requantized = 0;
902 }
903 else {
904 requantized += 1L << (-exp - 1);
905 requantized >>= -exp;
906 }
907 }
908 else {
909 if (exp >= 5) {
910 /* overflow */
911 # if defined(DEBUG)
912 fprintf(stderr, "requantize overflow (%f * 2^%d)\n",
913 mad_f_todouble(requantized), exp);
914 # endif
915 requantized = MAD_F_MAX;
916 }
917 else
918 requantized <<= exp;
919 }
920
921 return frac ? mad_f_mul(requantized, root_table[3 + frac]) : requantized;
922 }
923
924 /* we must take care that sz >= bits and sz < sizeof(long) lest bits == 0 */
925 # if defined(CPU_ARM)
926 # define MASK(cache, sz, bits) \
927 ({ unsigned long res; \
928 asm ("mov %0, #1\n\t" \
929 "rsb %0, %0, %0, lsl %3\n\t" \
930 "and %0, %0, %1, lsr %2" \
931 : "=&r" (res) : "r" (cache), "r" ((sz) - (bits)), "r" (bits)); \
932 res; \
933 })
934 #else
935 # define MASK(cache, sz, bits) \
936 (((cache) >> ((sz) - (bits))) & ((1 << (bits)) - 1))
937 #endif
938 # define MASK1BIT(cache, sz) \
939 ((cache) & (1 << ((sz) - 1)))
940
941 /*
942 * NAME: III_huffdecode()
943 * DESCRIPTION: decode Huffman code words of one channel of one granule
944 */
945 static
946 enum mad_error III_huffdecode(struct mad_bitptr *ptr, mad_fixed_t xrarr[576],
947 struct channel *channel,
948 unsigned char const *sfbwidth,
949 unsigned int part2_length)
950 {
951 unsigned int bits;
952 signed int exponents[39], exp;
953 signed int const *expptr;
954 struct mad_bitptr peek;
955 signed int bits_left, cachesz;
956 register mad_fixed_t *xr;
957 mad_fixed_t const *sfbound;
958 register unsigned long bitcache;
959
960 bits_left = (signed) channel->part2_3_length - (signed) part2_length;
961 if (bits_left < 0)
962 return MAD_ERROR_BADPART3LEN;
963
964 III_exponents(channel, sfbwidth, exponents);
965
966 peek = *ptr;
967 cachesz = 0;
968 sfbound = xr = xrarr;
969 mad_bit_skip(ptr, bits_left);
970
971 /* big_values */
972 {
973 int region;
974 struct hufftable const *entry;
975 union huffpair const *table;
976 unsigned int linbits, startbits, rcount;
977 mad_fixed_t reqcache[16];
978 mad_fixed_t const *xr_end, *xr_big_val;
979
980 rcount = 1;
981 expptr = &exponents[0];
982 region = -1;
983 exp = 0x3210; /* start value */
984 bitcache = 0;
985 linbits = startbits = 0;
986 table = NULL;
987 xr_big_val = xr + 2 * channel->big_values;
988
989 while(xr < xr_big_val)
990 {
991 sfbound += *sfbwidth++;
992 xr_end = sfbound > xr_big_val ? xr_big_val : sfbound;
993
994 /* change table if region boundary */
995 if(--rcount == 0)
996 {
997 if(exp == 0x3210)
998 rcount = channel->region0_count + 1;
999 else
1000 if(region == 0)
1001 rcount = channel->region1_count + 1;
1002 else
1003 rcount = 0; /* all remaining */
1004
1005 entry = &mad_huff_pair_table[channel->table_select[++region]];
1006 table = entry->table;
1007 linbits = entry->linbits;
1008 startbits = entry->startbits;
1009
1010 if(table == 0)
1011 return MAD_ERROR_BADHUFFTABLE;
1012 }
1013
1014 if(exp != *expptr)
1015 {
1016 exp = *expptr;
1017 /* clear cache */
1018 memset(reqcache, 0, sizeof(reqcache));
1019 }
1020
1021 ++expptr;
1022
1023 if(linbits)
1024 {
1025 for( ; xr<xr_end; xr+=2)
1026 {
1027 union huffpair const *pair;
1028 register mad_fixed_t requantized;
1029 unsigned int clumpsz, value;
1030
1031 /* maxhuffcode(hufftab16,hufftab24)=17bit + sign(x,y)=2bit */
1032 if(cachesz < 19)
1033 {
1034 if(cachesz < 0)
1035 return MAD_ERROR_BADHUFFDATA; /* cache underrun */
1036
1037 bits = MAXLSHIFT - cachesz;
1038 bitcache = (bitcache << bits) | mad_bit_read(&peek, bits);
1039 cachesz += bits;
1040 }
1041
1042 /* hcod (0..19) */
1043 clumpsz = startbits;
1044 pair = &table[MASK(bitcache, cachesz, clumpsz)];
1045
1046 while(!pair->final)
1047 {
1048 cachesz -= clumpsz;
1049 clumpsz = pair->ptr.bits;
1050 pair = &table[pair->ptr.offset + MASK(bitcache, cachesz, clumpsz)];
1051 }
1052
1053 cachesz -= pair->value.hlen;
1054
1055 /* x (0..14) */
1056 value = pair->value.x;
1057 if(value == 0)
1058 xr[0] = 0;
1059 else
1060 {
1061 if(value == 15)
1062 {
1063 /* maxlinbits=13bit + sign(x,y)=2bit */
1064 if(cachesz < 15)
1065 {
1066 if(cachesz < 0)
1067 return MAD_ERROR_BADHUFFDATA; /* cache underrun */
1068
1069 bits = MAXLSHIFT - cachesz;
1070 bitcache = (bitcache << bits) | mad_bit_read(&peek, bits);
1071 cachesz += bits;
1072 }
1073
1074 requantized = III_requantize(15+MASK(bitcache, cachesz, linbits), exp);
1075 cachesz -= linbits;
1076 }
1077 else
1078 {
1079 if(reqcache[value])
1080 requantized = reqcache[value];
1081 else
1082 requantized = reqcache[value] = III_requantize(value, exp);
1083 }
1084
1085 xr[0] = MASK1BIT(bitcache, cachesz--) ? -requantized : requantized;
1086 }
1087
1088 /* y (0..14) */
1089 value = pair->value.y;
1090 if(value == 0)
1091 xr[1] = 0;
1092 else
1093 {
1094 if(value == 15)
1095 {
1096 /* maxlinbits=13bit + sign(y)=1bit */
1097 if(cachesz < 14)
1098 {
1099 if(cachesz < 0)
1100 return MAD_ERROR_BADHUFFDATA; /* cache underrun */
1101
1102 bits = MAXLSHIFT - cachesz;
1103 bitcache = (bitcache << bits) | mad_bit_read(&peek, bits);
1104 cachesz += bits;
1105 }
1106
1107 requantized = III_requantize(15+MASK(bitcache, cachesz, linbits), exp);
1108 cachesz -= linbits;
1109 }
1110 else
1111 {
1112 if(reqcache[value])
1113 requantized = reqcache[value];
1114 else
1115 requantized = reqcache[value] = III_requantize(value, exp);
1116 }
1117 xr[1] = MASK1BIT(bitcache, cachesz--) ? -requantized : requantized;
1118 }
1119 }
1120 }
1121 else
1122 {
1123 for( ; xr<xr_end; xr+=2)
1124 {
1125 union huffpair const *pair;
1126 register mad_fixed_t requantized;
1127 unsigned int clumpsz, value;
1128
1129 /* maxlookup=4bit + sign(x,y)=2bit */
1130 if(cachesz < 6)
1131 {
1132 if(cachesz < 0)
1133 return MAD_ERROR_BADHUFFDATA; /* cache underrun */
1134
1135 bits = MAXLSHIFT - cachesz;
1136 bitcache = (bitcache << bits) | mad_bit_read(&peek, bits);
1137 cachesz += bits;
1138 }
1139
1140 /* hcod (0..19) */
1141 clumpsz = startbits;
1142 pair = &table[MASK(bitcache, cachesz, clumpsz)];
1143
1144 while(!pair->final)
1145 {
1146 cachesz -= clumpsz;
1147
1148 /* maxlookup=4bit + sign(x,y)=2bit */
1149 if(cachesz < 6)
1150 {
1151 if(cachesz < 0)
1152 return MAD_ERROR_BADHUFFDATA; /* cache underrun */
1153
1154 bits = MAXLSHIFT - cachesz;
1155 bitcache = (bitcache << bits) | mad_bit_read(&peek, bits);
1156 cachesz += bits;
1157 }
1158
1159 clumpsz = pair->ptr.bits;
1160 pair = &table[pair->ptr.offset + MASK(bitcache, cachesz, clumpsz)];
1161 }
1162
1163 cachesz -= pair->value.hlen;
1164
1165 /* x (0..1) */
1166 value = pair->value.x;
1167 if(value == 0)
1168 xr[0] = 0;
1169 else
1170 {
1171 if(reqcache[value])
1172 requantized = reqcache[value];
1173 else
1174 requantized = reqcache[value] = III_requantize(value, exp);
1175
1176 xr[0] = MASK1BIT(bitcache, cachesz--) ? -requantized : requantized;
1177 }
1178
1179 /* y (0..1) */
1180 value = pair->value.y;
1181 if(value == 0)
1182 xr[1] = 0;
1183 else
1184 {
1185 if(reqcache[value])
1186 requantized = reqcache[value];
1187 else
1188 requantized = reqcache[value] = III_requantize(value, exp);
1189
1190 xr[1] = MASK1BIT(bitcache, cachesz--) ? -requantized : requantized;
1191 }
1192 }
1193 }
1194 }
1195 }
1196
1197 bits_left = ptr->readbit - peek.readbit;
1198
1199 if(bits_left + cachesz < 0)
1200 return MAD_ERROR_BADHUFFDATA; /* big_values overrun */
1201
1202 /* count1 */
1203 {
1204 union huffquad const *table;
1205 register mad_fixed_t requantized;
1206
1207 table = mad_huff_quad_table[channel->flags & count1table_select];
1208
1209 requantized = III_requantize(1, exp);
1210
1211 while(xr <= &xrarr[572] && bits_left + cachesz > 0)
1212 {
1213 union huffquad const *quad;
1214
1215 /* hcod (1..6) */
1216 if(cachesz < 10)
1217 {
1218 if(cachesz < 0)
1219 return MAD_ERROR_BADHUFFDATA; /* cache underrun */
1220
1221 bits = MAXLSHIFT - cachesz;
1222 bitcache = (bitcache << bits) | mad_bit_read(&peek, bits);
1223 cachesz += bits;
1224 bits_left -= bits;
1225 }
1226
1227 quad = &table[MASK(bitcache, cachesz, 4)];
1228
1229 /* quad tables guaranteed to have at most one extra lookup */
1230 if (!quad->final) {
1231 cachesz -= 4;
1232
1233 quad = &table[quad->ptr.offset +
1234 MASK(bitcache, cachesz, quad->ptr.bits)];
1235 }
1236
1237 cachesz -= quad->value.hlen;
1238
1239 if (xr == sfbound) {
1240 sfbound += *sfbwidth++;
1241
1242 if (exp != *expptr) {
1243 exp = *expptr;
1244 requantized = III_requantize(1, exp);
1245 }
1246
1247 ++expptr;
1248 }
1249
1250 /* v (0..1) */
1251 xr[0] = quad->value.v ?
1252 (MASK1BIT(bitcache, cachesz--) ? -requantized : requantized) : 0;
1253
1254 /* w (0..1) */
1255 xr[1] = quad->value.w ?
1256 (MASK1BIT(bitcache, cachesz--) ? -requantized : requantized) : 0;
1257
1258 xr += 2;
1259
1260 if (xr == sfbound) {
1261 sfbound += *sfbwidth++;
1262
1263 if (exp != *expptr) {
1264 exp = *expptr;
1265 requantized = III_requantize(1, exp);
1266 }
1267
1268 ++expptr;
1269 }
1270
1271 /* x (0..1) */
1272 xr[0] = quad->value.x ?
1273 (MASK1BIT(bitcache, cachesz--) ? -requantized : requantized) : 0;
1274
1275 /* y (0..1) */
1276 xr[1] = quad->value.y ?
1277 (MASK1BIT(bitcache, cachesz--) ? -requantized : requantized) : 0;
1278
1279 xr += 2;
1280 }
1281
1282 if(bits_left + cachesz < 0)
1283 {
1284 /* technically the bitstream is misformatted, but apparently
1285 some encoders are just a bit sloppy with stuffing bits */
1286 xr -= 4;
1287 }
1288 }
1289
1290 /* rzero */
1291 memset(xr, 0, (char*)&xrarr[576] - (char*)xr);
1292
1293 return MAD_ERROR_NONE;
1294 }
1295
1296 # undef MASK
1297 # undef MASK1BIT
1298
1299 /*
1300 * NAME: III_reorder()
1301 * DESCRIPTION: reorder frequency lines of a short block into subband order
1302 */
1303 static
1304 void III_reorder(mad_fixed_t xr[576], struct channel const *channel,
1305 unsigned char const sfbwidth[39])
1306 {
1307 mad_fixed_t tmp[32][3][6];
1308 unsigned int sb, l, f, w, sbw[3], sw[3];
1309
1310 /* this is probably wrong for 8000 Hz mixed blocks */
1311
1312 sb = 0;
1313 if (channel->flags & mixed_block_flag) {
1314 sb = 2;
1315
1316 l = 0;
1317 while (l < 36)
1318 l += *sfbwidth++;
1319 }
1320
1321 for (w = 0; w < 3; ++w) {
1322 sbw[w] = sb;
1323 sw[w] = 0;
1324 }
1325
1326 f = *sfbwidth++;
1327 w = 0;
1328
1329 for (l = 18 * sb; l < 576; ++l) {
1330 if (f-- == 0) {
1331 f = *sfbwidth++ - 1;
1332 w = (w + 1) % 3;
1333 }
1334
1335 unsigned int sbww = sbw[w];
1336 tmp[sbww][w][sw[w]++] = xr[l];
1337
1338 if (sw[w] == 6) {
1339 sw[w] = 0;
1340 ++sbw[w];
1341 }
1342 }
1343
1344 memcpy(&xr[18 * sb], &tmp[sb], (576 - 18 * sb) * sizeof(mad_fixed_t));
1345 }
1346
1347 /*
1348 * NAME: III_stereo()
1349 * DESCRIPTION: perform joint stereo processing on a granule
1350 */
1351 static
1352 enum mad_error III_stereo(mad_fixed_t xr[2][576],
1353 struct granule const *granule,
1354 struct mad_header *header,
1355 unsigned char const *sfbwidth)
1356 {
1357 short modes[39];
1358 unsigned int sfbi, l, n, i;
1359
1360 if (granule->ch[0].block_type !=
1361 granule->ch[1].block_type ||
1362 (granule->ch[0].flags & mixed_block_flag) !=
1363 (granule->ch[1].flags & mixed_block_flag))
1364 return MAD_ERROR_BADSTEREO;
1365
1366 for (i = 0; i < 39; ++i)
1367 modes[i] = header->mode_extension;
1368
1369 /* intensity stereo */
1370
1371 if (header->mode_extension & I_STEREO) {
1372 struct channel const *right_ch = &granule->ch[1];
1373 mad_fixed_t const *right_xr = xr[1];
1374 unsigned int is_pos;
1375
1376 header->flags |= MAD_FLAG_I_STEREO;
1377
1378 /* first determine which scalefactor bands are to be processed */
1379
1380 if (right_ch->block_type == 2) {
1381 unsigned int lower, start, max, bound[3], w;
1382
1383 lower = start = max = bound[0] = bound[1] = bound[2] = 0;
1384
1385 sfbi = l = 0;
1386
1387 if (right_ch->flags & mixed_block_flag) {
1388 while (l < 36) {
1389 n = sfbwidth[sfbi++];
1390
1391 for (i = 0; i < n; ++i) {
1392 if (right_xr[i]) {
1393 lower = sfbi;
1394 break;
1395 }
1396 }
1397
1398 right_xr += n;
1399 l += n;
1400 }
1401
1402 start = sfbi;
1403 }
1404
1405 w = 0;
1406 while (l < 576) {
1407 n = sfbwidth[sfbi++];
1408
1409 for (i = 0; i < n; ++i) {
1410 if (right_xr[i]) {
1411 max = bound[w] = sfbi;
1412 break;
1413 }
1414 }
1415
1416 right_xr += n;
1417 l += n;
1418 w = (w + 1) % 3;
1419 }
1420
1421 if (max)
1422 lower = start;
1423
1424 /* long blocks */
1425
1426 for (i = 0; i < lower; ++i)
1427 modes[i] = header->mode_extension & ~I_STEREO;
1428
1429 /* short blocks */
1430
1431 w = 0;
1432 for (i = start; i < max; ++i) {
1433 if (i < bound[w])
1434 modes[i] = header->mode_extension & ~I_STEREO;
1435
1436 w = (w + 1) % 3;
1437 }
1438 }
1439 else { /* right_ch->block_type != 2 */
1440 unsigned int bound;
1441
1442 bound = 0;
1443 for (sfbi = l = 0; l < 576; l += n) {
1444 n = sfbwidth[sfbi++];
1445
1446 for (i = 0; i < n; ++i) {
1447 if (right_xr[i]) {
1448 bound = sfbi;
1449 break;
1450 }
1451 }
1452
1453 right_xr += n;
1454 }
1455
1456 for (i = 0; i < bound; ++i)
1457 modes[i] = header->mode_extension & ~I_STEREO;
1458 }
1459
1460 /* now do the actual processing */
1461
1462 if (header->flags & MAD_FLAG_LSF_EXT) {
1463 unsigned char const *illegal_pos = granule[1].ch[1].scalefac;
1464 mad_fixed_t const *lsf_scale;
1465
1466 /* intensity_scale */
1467 lsf_scale = is_lsf_table[right_ch->scalefac_compress & 0x1];
1468
1469 for (sfbi = l = 0; l < 576; ++sfbi, l += n) {
1470 n = sfbwidth[sfbi];
1471
1472 if (!(modes[sfbi] & I_STEREO))
1473 continue;
1474
1475 if (illegal_pos[sfbi]) {
1476 modes[sfbi] &= ~I_STEREO;
1477 continue;
1478 }
1479
1480 is_pos = right_ch->scalefac[sfbi];
1481
1482 for (i = 0; i < n; ++i) {
1483 register mad_fixed_t left;
1484
1485 left = xr[0][l + i];
1486
1487 if (is_pos == 0)
1488 xr[1][l + i] = left;
1489 else {
1490 register mad_fixed_t opposite;
1491
1492 opposite = mad_f_mul(left, lsf_scale[(is_pos - 1) / 2]);
1493
1494 if (is_pos & 1) {
1495 xr[0][l + i] = opposite;
1496 xr[1][l + i] = left;
1497 }
1498 else
1499 xr[1][l + i] = opposite;
1500 }
1501 }
1502 }
1503 }
1504 else { /* !(header->flags & MAD_FLAG_LSF_EXT) */
1505 for (sfbi = l = 0; l < 576; ++sfbi, l += n) {
1506 n = sfbwidth[sfbi];
1507
1508 if (!(modes[sfbi] & I_STEREO))
1509 continue;
1510
1511 is_pos = right_ch->scalefac[sfbi];
1512
1513 if (is_pos >= 7) { /* illegal intensity position */
1514 modes[sfbi] &= ~I_STEREO;
1515 continue;
1516 }
1517
1518 for (i = 0; i < n; ++i) {
1519 register mad_fixed_t left;
1520
1521 left = xr[0][l + i];
1522
1523 xr[0][l + i] = mad_f_mul(left, is_table[ is_pos]);
1524 xr[1][l + i] = mad_f_mul(left, is_table[6 - is_pos]);
1525 }
1526 }
1527 }
1528 }
1529
1530 /* middle/side stereo */
1531
1532 if (header->mode_extension & MS_STEREO) {
1533 register mad_fixed_t invsqrt2;
1534
1535 header->flags |= MAD_FLAG_MS_STEREO;
1536
1537 invsqrt2 = root_table[3 + -2];
1538
1539 for (sfbi = l = 0; l < 576; ++sfbi, l += n) {
1540 n = sfbwidth[sfbi];
1541
1542 if (modes[sfbi] != MS_STEREO)
1543 continue;
1544
1545 for (i = 0; i < n; ++i) {
1546 register mad_fixed_t m, s;
1547
1548 m = xr[0][l + i];
1549 s = xr[1][l + i];
1550
1551 xr[0][l + i] = mad_f_mul(m + s, invsqrt2); /* l = (m + s) / sqrt(2) */
1552 xr[1][l + i] = mad_f_mul(m - s, invsqrt2); /* r = (m - s) / sqrt(2) */
1553 }
1554 }
1555 }
1556
1557 return MAD_ERROR_NONE;
1558 }
1559
1560 #if defined(CPU_ARM)
1561 void III_aliasreduce(mad_fixed_t xr[576], int lines);
1562 #else
1563 /*
1564 * NAME: III_aliasreduce()
1565 * DESCRIPTION: perform frequency line alias reduction
1566 */
1567 static
1568 void III_aliasreduce(mad_fixed_t xr[576], int lines)
1569 {
1570 mad_fixed_t const *bound;
1571 int i;
1572
1573 bound = &xr[lines];
1574 for (xr += 18; xr < bound; xr += 18) {
1575 for (i = 0; i < 8; ++i) {
1576 register mad_fixed_t a, b;
1577 register mad_fixed64hi_t hi;
1578 register mad_fixed64lo_t lo;
1579
1580 a = xr[-1 - i];
1581 b = xr[ i];
1582
1583 # if defined(CPU_COLDFIRE)
1584 (void)hi, (void)lo;
1585 asm volatile ("mac.l %[a], %[csi], %%acc0\n\t"
1586 "msac.l %[b], %[cai], %%acc0\n\t"
1587 "mac.l %[b], %[csi], %%acc1\n\t"
1588 "mac.l %[a], %[cai], %%acc1\n\t"
1589 "movclr.l %%acc0, %[a]\n\t"
1590 "asl.l #3, %[a]\n\t"
1591 "movclr.l %%acc1, %[b]\n\t"
1592 "asl.l #3, %[b]\n\t"
1593 : [a] "+d" (a), [b] "+d" (b)
1594 : [csi] "r" (cs[i]), [cai] "r" (ca[i]));
1595 xr[-1 - i] = a;
1596 xr[ i] = b;
1597 # else
1598 MAD_F_ML0(hi, lo, a, cs[i]);
1599 MAD_F_MLA(hi, lo, -b, ca[i]);
1600
1601 xr[-1 - i] = MAD_F_MLZ(hi, lo);
1602
1603 MAD_F_ML0(hi, lo, b, cs[i]);
1604 MAD_F_MLA(hi, lo, a, ca[i]);
1605
1606 xr[ i] = MAD_F_MLZ(hi, lo);
1607 # endif
1608 }
1609 }
1610 }
1611 #endif
1612
1613 # if defined(FPM_ARM)
1614 void III_imdct_l(mad_fixed_t const [18], mad_fixed_t [36], unsigned int);
1615 # else
1616 /*
1617 * NAME: imdct36
1618 * DESCRIPTION: perform X[18]->x[36] IMDCT
1619 */
1620 # if defined(CPU_COLDFIRE)
1621 /* emac optimized imdct36, it is very ugly and i hope to replace it soon.
1622 * for now it is actually somewhat faster than the stock implementation.
1623 */
1624 static inline
1625 void imdct36(mad_fixed_t const X[18], mad_fixed_t x[36])
1626 {
1627 mad_fixed_t t[16];
1628 /* assumes FRACBITS = 28 */
1629 asm volatile (
1630 /* MAD_F_ML0(hi, lo, X[4], MAD_F(0x0ec835e8)); */
1631 /* MAD_F_MLA(hi, lo, X[13], MAD_F(0x061f78aa)); */
1632 /* t6 = MAD_F_MLZ(hi, lo); */
1633 "move.l (4*4, %[X]), %%d0\n"
1634 "move.l #0x0ec835e8, %%d1\n"
1635 "move.l #0x061f78aa, %%d2\n"
1636 "mac.l %%d1, %%d0, (13*4, %[X]), %%d0, %%acc0\n"
1637 "mac.l %%d2, %%d0, ( 1*4, %[X]), %%d0, %%acc0\n"
1638 "move.l %%acc0, %%d7\n"
1639 "asl.l #3, %%d7\n"
1640 "move.l %%d7, (6*4, %[t])\n"
1641
1642 /* MAD_F_ML0(hi, lo, (t14 = X[1] - X[10]), -MAD_F(0x0ec835e8)); */
1643 /* MAD_F_MLA(hi, lo, (t15 = X[7] + X[16]), MAD_F(0x061f78aa)); */
1644 /* t4 = MAD_F_MLZ(hi, lo); */
1645 /* MAD_F_MLA(hi, lo, t14, -MAD_F(0x061f78aa)); */
1646 /* MAD_F_MLA(hi, lo, t15, -MAD_F(0x0ec835e8)); */
1647 /* t0 = MAD_F_MLZ(hi, lo); */
1648 "sub.l (10*4, %[X]), %%d0\n" /* t14 */
1649 "msac.l %%d0, %%d1, %%acc1\n"
1650 "msac.l %%d0, %%d2, (7*4, %[X]), %%d5, %%acc0\n"
1651 "add.l (16*4, %[X]), %%d5\n" /* t15 */
1652 "mac.l %%d5, %%d2, %%acc1\n"
1653 "msac.l %%d5, %%d1, ( %[X]), %%d5, %%acc0\n"
1654 "movclr.l %%acc1, %%d6\n"
1655 "asl.l #3, %%d6\n" /* t4 */
1656 "move.l %%d6, (4*4, %[t])\n"
1657 "move.l %%acc0, %%d0\n"
1658 "asl.l #3, %%d0\n" /* t0 */
1659 "move.l %%d0, (0*4, %[t])\n"
1660
1661 /* MAD_F_MLA(hi, lo, (t8 =X[0]-X[11]-X[12]), MAD_F(0x0216a2a2)); */
1662 /* MAD_F_MLA(hi, lo, (t9 =X[2]-X[ 9]-X[14]), MAD_F(0x09bd7ca0)); */
1663 /* MAD_F_MLA(hi, lo, (t10=X[3]-X[ 8]-X[15]), -MAD_F(0x0cb19346)); */
1664 /* MAD_F_MLA(hi, lo, (t11=X[5]-X[ 6]-X[17]), -MAD_F(0x0fdcf549)); */
1665 /* x[10] = -(x[7] = MAD_F_MLZ(hi, lo)); */
1666
1667 /* MAD_F_ML0(hi, lo, t8, -MAD_F(0x0cb19346)); */
1668 /* MAD_F_MLA(hi, lo, t9, MAD_F(0x0fdcf549)); */
1669 /* MAD_F_MLA(hi, lo, t10, MAD_F(0x0216a2a2)); */
1670 /* MAD_F_MLA(hi, lo, t11, -MAD_F(0x09bd7ca0)); */
1671 /* x[19] = x[34] = MAD_F_MLZ(hi, lo) - t0; */
1672
1673 /* MAD_F_ML0(hi, lo, t8, MAD_F(0x09bd7ca0)); */
1674 /* MAD_F_MLA(hi, lo, t9, -MAD_F(0x0216a2a2)); */
1675 /* MAD_F_MLA(hi, lo, t10, MAD_F(0x0fdcf549)); */
1676 /* MAD_F_MLA(hi, lo, t11, -MAD_F(0x0cb19346)); */
1677 /* x[ 1] = MAD_F_MLZ(hi, lo); */
1678
1679 /* MAD_F_ML0(hi, lo, t8, -MAD_F(0x0fdcf549)); */
1680 /* MAD_F_MLA(hi, lo, t9, -MAD_F(0x0cb19346)); */
1681 /* MAD_F_MLA(hi, lo, t10, -MAD_F(0x09bd7ca0)); */
1682 /* MAD_F_MLA(hi, lo, t11, -MAD_F(0x0216a2a2)); */
1683 /* x[25] = MAD_F_MLZ(hi, lo); */
1684
1685 /* t12 = t8 - t10; */
1686 /* t13 = t9 + t11; */
1687 "move.l #0x0216a2a2, %%d1\n"
1688 "move.l #0x0cb19346, %%d2\n"
1689 "move.l #0x09bd7ca0, %%d3\n"
1690 "move.l #0x0fdcf549, %%d4\n"
1691 "sub.l (11*4, %[X]), %%d5\n"
1692 "sub.l (12*4, %[X]), %%d5\n"
1693 "mac.l %%d1, %%d5, %%acc0\n"
1694 "msac.l %%d2, %%d5, %%acc1\n"
1695 "mac.l %%d3, %%d5, %%acc2\n"
1696 "msac.l %%d4, %%d5, (2*4, %[X]), %%d6, %%acc3\n"
1697 "sub.l ( 9*4, %[X]), %%d6\n"
1698 "sub.l (14*4, %[X]), %%d6\n"
1699 "mac.l %%d3, %%d6, %%acc0\n"
1700 "mac.l %%d4, %%d6, %%acc1\n"
1701 "msac.l %%d1, %%d6, %%acc2\n"
1702 "msac.l %%d2, %%d6, (3*4, %[X]), %%d7, %%acc3\n"
1703 "sub.l ( 8*4, %[X]), %%d7\n"
1704 "sub.l (15*4, %[X]), %%d7\n"
1705 "sub.l %%d7, %%d5\n" /* d5: t12 */
1706 "move.l %%d5, (12*4, %[t])\n"
1707 "msac.l %%d2, %%d7, %%acc0\n"
1708 "mac.l %%d1, %%d7, %%acc1\n"
1709 "mac.l %%d4, %%d7, %%acc2\n"
1710 "msac.l %%d3, %%d7, (5*4, %[X]), %%d7, %%acc3\n"
1711 "sub.l ( 6*4, %[X]), %%d7\n"
1712 "sub.l (17*4, %[X]), %%d7\n"
1713 "add.l %%d7, %%d6\n" /* d6: t13 */
1714 "move.l %%d6, (13*4, %[t])\n"
1715 "msac.l %%d4, %%d7, %%acc0\n"
1716 "msac.l %%d3, %%d7, %%acc1\n"
1717 "msac.l %%d2, %%d7, %%acc2\n"
1718 "msac.l %%d1, %%d7, (1*4, %[X]), %%d5, %%acc3\n"
1719
1720 "movclr.l %%acc0, %%d7\n"
1721 "asl.l #3, %%d7\n"
1722 "move.l %%d7, (7*4, %[x])\n"
1723 "neg.l %%d7\n"
1724 "move.l %%d7, (10*4, %[x])\n"
1725
1726 "movclr.l %%acc1, %%d7\n"
1727 "asl.l #3, %%d7\n"
1728 "sub.l %%d0, %%d7\n"
1729 "move.l %%d7, (19*4, %[x])\n"
1730 "move.l %%d7, (34*4, %[x])\n"
1731
1732 "movclr.l %%acc2, %%d7\n"
1733 "asl.l #3, %%d7\n"
1734 "move.l %%d7, ( 1*4, %[x])\n"
1735
1736 "movclr.l %%acc3, %%d7\n"
1737 "asl.l #3, %%d7\n"
1738 "move.l %%d7, (25*4, %[x])\n"
1739
1740 /* MAD_F_ML0(hi, lo, X[1], -MAD_F(0x09bd7ca0)); */
1741 /* MAD_F_MLA(hi, lo, X[7], MAD_F(0x0216a2a2)); */
1742 /* MAD_F_MLA(hi, lo, X[10], -MAD_F(0x0fdcf549)); */
1743 /* MAD_F_MLA(hi, lo, X[16], MAD_F(0x0cb19346)); */
1744 /* t1 = MAD_F_MLZ(hi, lo) + t6; */
1745
1746 /* MAD_F_ML0(hi, lo, X[1], -MAD_F(0x0216a2a2)); */
1747 /* MAD_F_MLA(hi, lo, X[7], -MAD_F(0x09bd7ca0)); */
1748 /* MAD_F_MLA(hi, lo, X[10], MAD_F(0x0cb19346)); */
1749 /* MAD_F_MLA(hi, lo, X[16], MAD_F(0x0fdcf549)); */
1750 /* t3 = MAD_F_MLZ(hi, lo); */
1751
1752 /* MAD_F_ML0(hi, lo, X[1], -MAD_F(0x0fdcf549)); */
1753 /* MAD_F_MLA(hi, lo, X[7], -MAD_F(0x0cb19346)); */
1754 /* MAD_F_MLA(hi, lo, X[10], -MAD_F(0x09bd7ca0)); */
1755 /* MAD_F_MLA(hi, lo, X[16], -MAD_F(0x0216a2a2)); */
1756 /* t5 = MAD_F_MLZ(hi, lo) - t6; */
1757 "msac.l %%d3, %%d5, %%acc0\n"
1758 "msac.l %%d1, %%d5, %%acc1\n"
1759 "msac.l %%d4, %%d5, ( 7*4, %[X]), %%d5, %%acc2\n"
1760 "mac.l %%d1, %%d5, %%acc0\n"
1761 "msac.l %%d3, %%d5, %%acc1\n"
1762 "msac.l %%d2, %%d5, (10*4, %[X]), %%d5, %%acc2\n"
1763 "msac.l %%d4, %%d5, %%acc0\n"
1764 "mac.l %%d2, %%d5, %%acc1\n"
1765 "msac.l %%d3, %%d5, (16*4, %[X]), %%d5, %%acc2\n"
1766 "mac.l %%d2, %%d5, %%acc0\n"
1767 "mac.l %%d4, %%d5, %%acc1\n"
1768 "msac.l %%d1, %%d5, ( 0*4, %[X]), %%d0, %%acc2\n"
1769
1770 "movclr.l %%acc0, %%d7\n"
1771 "asl.l #3, %%d7\n"
1772 "add.l (6*4, %[t]), %%d7\n" /* t1 */
1773
1774 "movclr.l %%acc1, %%d5\n"
1775 "asl.l #3, %%d5\n" /* t3 */
1776
1777 "movclr.l %%acc2, %%d6\n"
1778 "asl.l #3, %%d6\n"
1779 "sub.l (6*4, %[t]), %%d6\n" /* t5 */
1780 "move.l %%d6, (5*4, %[t])\n"
1781
1782 /* MAD_F_ML0(hi, lo, X[0], MAD_F(0x03768962)); */
1783 /* MAD_F_MLA(hi, lo, X[2], MAD_F(0x0e313245)); */
1784 /* MAD_F_MLA(hi, lo, X[3], -MAD_F(0x0ffc19fd)); */
1785 /* MAD_F_MLA(hi, lo, X[5], -MAD_F(0x0acf37ad)); */
1786 /* MAD_F_MLA(hi, lo, X[6], MAD_F(0x04cfb0e2)); */
1787 /* MAD_F_MLA(hi, lo, X[8], -MAD_F(0x0898c779)); */
1788 /* MAD_F_MLA(hi, lo, X[9], MAD_F(0x0d7e8807)); */
1789 /* MAD_F_MLA(hi, lo, X[11], MAD_F(0x0f426cb5)); */
1790 /* MAD_F_MLA(hi, lo, X[12], -MAD_F(0x0bcbe352)); */
1791 /* MAD_F_MLA(hi, lo, X[14], MAD_F(0x00b2aa3e)); */
1792 /* MAD_F_MLA(hi, lo, X[15], -MAD_F(0x07635284)); */
1793 /* MAD_F_MLA(hi, lo, X[17], -MAD_F(0x0f9ee890)); */
1794 /* x[11] = -(x[6] = MAD_F_MLZ(hi, lo) + t1); */
1795 /* MAD_F_ML0(hi, lo, X[0], -MAD_F(0x0f426cb5)); */
1796 /* MAD_F_MLA(hi, lo, X[2], -MAD_F(0x00b2aa3e)); */
1797 /* MAD_F_MLA(hi, lo, X[3], MAD_F(0x0898c779)); */
1798 /* MAD_F_MLA(hi, lo, X[5], MAD_F(0x0f9ee890)); */
1799 /* MAD_F_MLA(hi, lo, X[6], MAD_F(0x0acf37ad)); */
1800 /* MAD_F_MLA(hi, lo, X[8], -MAD_F(0x07635284)); */
1801 /* MAD_F_MLA(hi, lo, X[9], -MAD_F(0x0e313245)); */
1802 /* MAD_F_MLA(hi, lo, X[11], -MAD_F(0x0bcbe352)); */
1803 /* MAD_F_MLA(hi, lo, X[12], -MAD_F(0x03768962)); */
1804 /* MAD_F_MLA(hi, lo, X[14], MAD_F(0x0d7e8807)); */
1805 /* MAD_F_MLA(hi, lo, X[15], MAD_F(0x0ffc19fd)); */
1806 /* MAD_F_MLA(hi, lo, X[17], MAD_F(0x04cfb0e2)); */
1807 /* x[23] = x[30] = MAD_F_MLZ(hi, lo) + t1; */
1808 /* MAD_F_ML0(hi, lo, X[0], -MAD_F(0x0bcbe352)); */
1809 /* MAD_F_MLA(hi, lo, X[2], MAD_F(0x0d7e8807)); */
1810 /* MAD_F_MLA(hi, lo, X[3], -MAD_F(0x07635284)); */
1811 /* MAD_F_MLA(hi, lo, X[5], MAD_F(0x04cfb0e2)); */
1812 /* MAD_F_MLA(hi, lo, X[6], MAD_F(0x0f9ee890)); */
1813 /* MAD_F_MLA(hi, lo, X[8], -MAD_F(0x0ffc19fd)); */
1814 /* MAD_F_MLA(hi, lo, X[9], -MAD_F(0x00b2aa3e)); */
1815 /* MAD_F_MLA(hi, lo, X[11], MAD_F(0x03768962)); */
1816 /* MAD_F_MLA(hi, lo, X[12], -MAD_F(0x0f426cb5)); */
1817 /* MAD_F_MLA(hi, lo, X[14], MAD_F(0x0e313245)); */
1818 /* MAD_F_MLA(hi, lo, X[15], MAD_F(0x0898c779)); */
1819 /* MAD_F_MLA(hi, lo, X[17], -MAD_F(0x0acf37ad)); */
1820 /* x[18] = x[35] = MAD_F_MLZ(hi, lo) - t1; */
1821 "move.l #0x03768962, %%d1\n"
1822 "move.l #0x0f426cb5, %%d2\n"
1823 "move.l #0x0bcbe352, %%d3\n"
1824 "mac.l %%d1, %%d0, %%acc0\n"
1825 "msac.l %%d2, %%d0, %%acc1\n"
1826 "msac.l %%d3, %%d0, (11*4, %[X]), %%d0, %%acc2\n"
1827 "mac.l %%d2, %%d0, %%acc0\n"
1828 "msac.l %%d3, %%d0, %%acc1\n"
1829 "mac.l %%d1, %%d0, (12*4, %[X]), %%d0, %%acc2\n"
1830 "msac.l %%d3, %%d0, %%acc0\n"
1831 "msac.l %%d1, %%d0, %%acc1\n"
1832 "msac.l %%d2, %%d0, ( 2*4, %[X]), %%d0, %%acc2\n"
1833 "move.l #0x0e313245, %%d1\n"
1834 "move.l #0x00b2aa3e, %%d2\n"
1835 "move.l #0x0d7e8807, %%d3\n"
1836 "mac.l %%d1, %%d0, %%acc0\n"
1837 "msac.l %%d2, %%d0, %%acc1\n"
1838 "mac.l %%d3, %%d0, ( 9*4, %[X]), %%d0, %%acc2\n"
1839 "mac.l %%d3, %%d0, %%acc0\n"
1840 "msac.l %%d1, %%d0, %%acc1\n"
1841 "msac.l %%d2, %%d0, (14*4, %[X]), %%d0, %%acc2\n"
1842 "mac.l %%d2, %%d0, %%acc0\n"
1843 "mac.l %%d3, %%d0, %%acc1\n"
1844 "mac.l %%d1, %%d0, ( 3*4, %[X]), %%d0, %%acc2\n"
1845 "move.l #0x0ffc19fd, %%d1\n"
1846 "move.l #0x0898c779, %%d2\n"
1847 "move.l #0x07635284, %%d3\n"
1848 "msac.l %%d1, %%d0, %%acc0\n"
1849 "mac.l %%d2, %%d0, %%acc1\n"
1850 "msac.l %%d3, %%d0, ( 8*4, %[X]), %%d0, %%acc2\n"
1851 "msac.l %%d2, %%d0, %%acc0\n"
1852 "msac.l %%d3, %%d0, %%acc1\n"
1853 "msac.l %%d1, %%d0, (15*4, %[X]), %%d0, %%acc2\n"
1854 "msac.l %%d3, %%d0, %%acc0\n"
1855 "mac.l %%d1, %%d0, %%acc1\n"
1856 "mac.l %%d2, %%d0, ( 5*4, %[X]), %%d0, %%acc2\n"
1857 "move.l #0x0acf37ad, %%d1\n"
1858 "move.l #0x0f9ee890, %%d2\n"
1859 "move.l #0x04cfb0e2, %%d3\n"
1860 "msac.l %%d1, %%d0, %%acc0\n"
1861 "mac.l %%d2, %%d0, %%acc1\n"
1862 "mac.l %%d3, %%d0, ( 6*4, %[X]), %%d0, %%acc2\n"
1863 "mac.l %%d3, %%d0, %%acc0\n"
1864 "mac.l %%d1, %%d0, %%acc1\n"
1865 "mac.l %%d2, %%d0, (17*4, %[X]), %%d0, %%acc2\n"
1866 "msac.l %%d2, %%d0, %%acc0\n"
1867 "mac.l %%d3, %%d0, %%acc1\n"
1868 "msac.l %%d1, %%d0, ( 4*4, %[X]), %%d0, %%acc2\n"
1869
1870 "movclr.l %%acc0, %%d6\n"
1871 "asl.l #3, %%d6\n"
1872 "add.l %%d7, %%d6\n"
1873 "move.l %%d6, (6*4, %[x])\n"
1874 "neg.l %%d6\n"
1875 "move.l %%d6, (11*4, %[x])\n"
1876
1877 "movclr.l %%acc1, %%d6\n"
1878 "asl.l #3, %%d6\n"
1879 "add.l %%d7, %%d6\n"
1880 "move.l %%d6, (23*4, %[x])\n"
1881 "move.l %%d6, (30*4, %[x])\n"
1882
1883 "movclr.l %%acc2, %%d6\n"
1884 "asl.l #3, %%d6\n"
1885 "sub.l %%d7, %%d6\n"
1886 "move.l %%d6, (18*4, %[x])\n"
1887 "move.l %%d6, (35*4, %[x])\n"
1888
1889 /* MAD_F_ML0(hi, lo, X[4], MAD_F(0x061f78aa)); */
1890 /* MAD_F_MLA(hi, lo, X[13], -MAD_F(0x0ec835e8)); */
1891 /* t3 += (t7 = MAD_F_MLZ(hi, lo)); */
1892 /* t4 -= t7; */
1893 "move.l #0x061f78aa, %%d1\n"
1894 "mac.l %%d1, %%d0, (13*4, %[X]), %%d0, %%acc0\n"
1895 "move.l #0x0ec835e8, %%d1\n"
1896 "msac.l %%d1, %%d0, (1*4, %[X]), %%d0, %%acc0\n"
1897 "move.l %%acc0, %%d6\n"
1898 "asl.l #3, %%d6\n" /* t7 */
1899 "add.l %%d6, %%d5\n" /* t3 */
1900 "move.l (4*4, %[t]), %%d1\n"
1901 "sub.l %%d6, %%d1\n" /* t4 */
1902 "move.l %%d1, (4*4, %[t])\n"
1903
1904 /* MAD_F_MLA(hi, lo, X[1], -MAD_F(0x0cb19346)); */
1905 /* MAD_F_MLA(hi, lo, X[7], MAD_F(0x0fdcf549)); */
1906 /* MAD_F_MLA(hi, lo, X[10], MAD_F(0x0216a2a2)); */
1907 /* MAD_F_MLA(hi, lo, X[16], -MAD_F(0x09bd7ca0)); */
1908 /* t2 = MAD_F_MLZ(hi, lo); */
1909 "move.l #0x0cb19346, %%d1\n"
1910 "msac.l %%d1, %%d0, ( 7*4, %[X]), %%d0, %%acc0\n"
1911 "move.l #0x0fdcf549, %%d1\n"
1912 "mac.l %%d1, %%d0, (10*4, %[X]), %%d0, %%acc0\n"
1913 "move.l #0x0216a2a2, %%d1\n"
1914 "mac.l %%d1, %%d0, (16*4, %[X]), %%d0, %%acc0\n"
1915 "move.l #0x09bd7ca0, %%d1\n"
1916 "msac.l %%d1, %%d0, ( %[X]), %%d0, %%acc0\n"
1917 "move.l %%acc0, %%d7\n"
1918 "asl.l #3, %%d7\n" /* t2 */
1919
1920 /* MAD_F_MLA(hi, lo, X[0], MAD_F(0x04cfb0e2)); */
1921 /* MAD_F_MLA(hi, lo, X[2], MAD_F(0x0ffc19fd)); */
1922 /* MAD_F_MLA(hi, lo, X[3], -MAD_F(0x0d7e8807)); */
1923 /* MAD_F_MLA(hi, lo, X[5], MAD_F(0x03768962)); */
1924 /* MAD_F_MLA(hi, lo, X[6], -MAD_F(0x0bcbe352)); */
1925 /* MAD_F_MLA(hi, lo, X[8], -MAD_F(0x0e313245)); */
1926 /* MAD_F_MLA(hi, lo, X[9], MAD_F(0x07635284)); */
1927 /* MAD_F_MLA(hi, lo, X[11], -MAD_F(0x0acf37ad)); */
1928 /* MAD_F_MLA(hi, lo, X[12], MAD_F(0x0f9ee890)); */
1929 /* MAD_F_MLA(hi, lo, X[14], MAD_F(0x0898c779)); */
1930 /* MAD_F_MLA(hi, lo, X[15], MAD_F(0x00b2aa3e)); */
1931 /* MAD_F_MLA(hi, lo, X[17], MAD_F(0x0f426cb5)); */
1932 /* x[12] = -(x[5] = MAD_F_MLZ(hi, lo)); */
1933 /* MAD_F_ML0(hi, lo, X[0], MAD_F(0x0acf37ad)); */
1934 /* MAD_F_MLA(hi, lo, X[2], -MAD_F(0x0898c779)); */
1935 /* MAD_F_MLA(hi, lo, X[3], MAD_F(0x0e313245)); */
1936 /* MAD_F_MLA(hi, lo, X[5], -MAD_F(0x0f426cb5)); */
1937 /* MAD_F_MLA(hi, lo, X[6], -MAD_F(0x03768962)); */
1938 /* MAD_F_MLA(hi, lo, X[8], MAD_F(0x00b2aa3e)); */
1939 /* MAD_F_MLA(hi, lo, X[9], -MAD_F(0x0ffc19fd)); */
1940 /* MAD_F_MLA(hi, lo, X[11], MAD_F(0x0f9ee890)); */
1941 /* MAD_F_MLA(hi, lo, X[12], -MAD_F(0x04cfb0e2)); */
1942 /* MAD_F_MLA(hi, lo, X[14], MAD_F(0x07635284)); */
1943 /* MAD_F_MLA(hi, lo, X[15], MAD_F(0x0d7e8807)); */
1944 /* MAD_F_MLA(hi, lo, X[17], -MAD_F(0x0bcbe352)); */
1945 /* x[17] = -(x[0] = MAD_F_MLZ(hi, lo) + t2); */
1946 /* MAD_F_ML0(hi, lo, X[0], -MAD_F(0x0f9ee890)); */
1947 /* MAD_F_MLA(hi, lo, X[2], -MAD_F(0x07635284)); */
1948 /* MAD_F_MLA(hi, lo, X[3], -MAD_F(0x00b2aa3e)); */
1949 /* MAD_F_MLA(hi, lo, X[5], MAD_F(0x0bcbe352)); */
1950 /* MAD_F_MLA(hi, lo, X[6], MAD_F(0x0f426cb5)); */
1951 /* MAD_F_MLA(hi, lo, X[8], MAD_F(0x0d7e8807)); */
1952 /* MAD_F_MLA(hi, lo, X[9], MAD_F(0x0898c779)); */
1953 /* MAD_F_MLA(hi, lo, X[11], -MAD_F(0x04cfb0e2)); */
1954 /* MAD_F_MLA(hi, lo, X[12], -MAD_F(0x0acf37ad)); */
1955 /* MAD_F_MLA(hi, lo, X[14], -MAD_F(0x0ffc19fd)); */
1956 /* MAD_F_MLA(hi, lo, X[15], -MAD_F(0x0e313245)); */
1957 /* MAD_F_MLA(hi, lo, X[17], -MAD_F(0x03768962)); */
1958 /* x[24] = x[29] = MAD_F_MLZ(hi, lo) + t2; */
1959 "move.l #0x0acf37ad, %%d1\n"
1960 "move.l #0x0f9ee890, %%d2\n"
1961 "move.l #0x04cfb0e2, %%d3\n"
1962 "mac.l %%d3, %%d0, %%acc0\n"
1963 "mac.l %%d1, %%d0, %%acc1\n"
1964 "msac.l %%d2, %%d0, (11*4, %[X]), %%d0, %%acc2\n"
1965 "msac.l %%d1, %%d0, %%acc0\n"
1966 "mac.l %%d2, %%d0, %%acc1\n"
1967 "msac.l %%d3, %%d0, (12*4, %[X]), %%d0, %%acc2\n"
1968 "mac.l %%d2, %%d0, %%acc0\n"
1969 "msac.l %%d3, %%d0, %%acc1\n"
1970 "msac.l %%d1, %%d0, ( 2*4, %[X]), %%d0, %%acc2\n"
1971 "move.l #0x0ffc19fd, %%d1\n"
1972 "move.l #0x0898c779, %%d2\n"
1973 "move.l #0x07635284, %%d3\n"
1974 "mac.l %%d1, %%d0, %%acc0\n"
1975 "msac.l %%d2, %%d0, %%acc1\n"
1976 "msac.l %%d3, %%d0, ( 9*4, %[X]), %%d0, %%acc2\n"
1977 "mac.l %%d3, %%d0, %%acc0\n"
1978 "msac.l %%d1, %%d0, %%acc1\n"
1979 "mac.l %%d2, %%d0, (14*4, %[X]), %%d0, %%acc2\n"
1980 "mac.l %%d2, %%d0, %%acc0\n"
1981 "mac.l %%d3, %%d0, %%acc1\n"
1982 "msac.l %%d1, %%d0, ( 3*4, %[X]), %%d0, %%acc2\n"
1983 "move.l #0x0e313245, %%d1\n"
1984 "move.l #0x00b2aa3e, %%d2\n"
1985 "move.l #0x0d7e8807, %%d3\n"
1986 "msac.l %%d3, %%d0, %%acc0\n"
1987 "mac.l %%d1, %%d0, %%acc1\n"
1988 "msac.l %%d2, %%d0, ( 8*4, %[X]), %%d0, %%acc2\n"
1989 "msac.l %%d1, %%d0, %%acc0\n"
1990 "mac.l %%d2, %%d0, %%acc1\n"
1991 "mac.l %%d3, %%d0, (15*4, %[X]), %%d0, %%acc2\n"
1992 "mac.l %%d2, %%d0, %%acc0\n"
1993 "mac.l %%d3, %%d0, %%acc1\n"
1994 "msac.l %%d1, %%d0, ( 5*4, %[X]), %%d0, %%acc2\n"
1995 "move.l #0x03768962, %%d1\n"
1996 "move.l #0x0f426cb5, %%d2\n"
1997 "move.l #0x0bcbe352, %%d3\n"
1998 "mac.l %%d1, %%d0, %%acc0\n"
1999 "msac.l %%d2, %%d0, %%acc1\n"
2000 "mac.l %%d3, %%d0, ( 6*4, %[X]), %%d0, %%acc2\n"
2001 "msac.l %%d3, %%d0, %%acc0\n"
2002 "msac.l %%d1, %%d0, %%acc1\n"
2003 "mac.l %%d2, %%d0, (17*4, %[X]), %%d0, %%acc2\n"
2004 "mac.l %%d2, %%d0, %%acc0\n"
2005 "msac.l %%d3, %%d0, %%acc1\n"
2006 "msac.l %%d1, %%d0, ( %[X]), %%d0, %%acc2\n"
2007
2008 "movclr.l %%acc0, %%d6\n"
2009 "asl.l #3, %%d6\n"
2010 "move.l %%d6, ( 5*4, %[x])\n"
2011 "neg.l %%d6\n"
2012 "move.l %%d6, (12*4, %[x])\n"
2013
2014 "movclr.l %%acc1, %%d6\n"
2015 "asl.l #3, %%d6\n"
2016 "add.l %%d7, %%d6\n"
2017 "move.l %%d6, ( %[x])\n"
2018 "neg.l %%d6\n"
2019 "move.l %%d6, (17*4, %[x])\n"
2020
2021 "movclr.l %%acc2, %%d6\n"
2022 "asl.l #3, %%d6\n"
2023 "add.l %%d7, %%d6\n"
2024 "move.l %%d6, (24*4, %[x])\n"
2025 "move.l %%d6, (29*4, %[x])\n"
2026
2027 /* MAD_F_ML0(hi, lo, X[0], MAD_F(0x00b2aa3e)); */
2028 /* MAD_F_MLA(hi, lo, X[2], MAD_F(0x03768962)); */
2029 /* MAD_F_MLA(hi, lo, X[3], -MAD_F(0x04cfb0e2)); */
2030 /* MAD_F_MLA(hi, lo, X[5], -MAD_F(0x07635284)); */
2031 /* MAD_F_MLA(hi, lo, X[6], MAD_F(0x0898c779)); */
2032 /* MAD_F_MLA(hi, lo, X[8], MAD_F(0x0acf37ad)); */
2033 /* MAD_F_MLA(hi, lo, X[9], -MAD_F(0x0bcbe352)); */
2034 /* MAD_F_MLA(hi, lo, X[11], -MAD_F(0x0d7e8807)); */
2035 /* MAD_F_MLA(hi, lo, X[12], MAD_F(0x0e313245)); */
2036 /* MAD_F_MLA(hi, lo, X[14], MAD_F(0x0f426cb5)); */
2037 /* MAD_F_MLA(hi, lo, X[15], -MAD_F(0x0f9ee890)); */
2038 /* MAD_F_MLA(hi, lo, X[17], -MAD_F(0x0ffc19fd)); */
2039 /* x[9] = -(x[8] = MAD_F_MLZ(hi, lo) + t3); */
2040
2041 /* MAD_F_ML0(hi, lo, X[0], -MAD_F(0x0e313245)); */
2042 /* MAD_F_MLA(hi, lo, X[2], MAD_F(0x0bcbe352)); */
2043 /* MAD_F_MLA(hi, lo, X[3], MAD_F(0x0f9ee890)); */
2044 /* MAD_F_MLA(hi, lo, X[5], -MAD_F(0x0898c779)); */
2045 /* MAD_F_MLA(hi, lo, X[6], -MAD_F(0x0ffc19fd)); */
2046 /* MAD_F_MLA(hi, lo, X[8], MAD_F(0x04cfb0e2)); */
2047 /* MAD_F_MLA(hi, lo, X[9], MAD_F(0x0f426cb5)); */
2048 /* MAD_F_MLA(hi, lo, X[11], -MAD_F(0x00b2aa3e)); */
2049 /* MAD_F_MLA(hi, lo, X[12], -MAD_F(0x0d7e8807)); */
2050 /* MAD_F_MLA(hi, lo, X[14], -MAD_F(0x03768962)); */
2051 /* MAD_F_MLA(hi, lo, X[15], MAD_F(0x0acf37ad)); */
2052 /* MAD_F_MLA(hi, lo, X[17], MAD_F(0x07635284)); */
2053 /* x[21] = x[32] = MAD_F_MLZ(hi, lo) + t3; */
2054
2055 /* MAD_F_ML0(hi, lo, X[0], -MAD_F(0x0d7e8807)); */
2056 /* MAD_F_MLA(hi, lo, X[2], MAD_F(0x0f426cb5)); */
2057 /* MAD_F_MLA(hi, lo, X[3], MAD_F(0x0acf37ad)); */
2058 /* MAD_F_MLA(hi, lo, X[5], -MAD_F(0x0ffc19fd)); */
2059 /* MAD_F_MLA(hi, lo, X[6], -MAD_F(0x07635284)); */
2060 /* MAD_F_MLA(hi, lo, X[8], MAD_F(0x0f9ee890)); */
2061 /* MAD_F_MLA(hi, lo, X[9], MAD_F(0x03768962)); */
2062 /* MAD_F_MLA(hi, lo, X[11], -MAD_F(0x0e313245)); */
2063 /* MAD_F_MLA(hi, lo, X[12], MAD_F(0x00b2aa3e)); */
2064 /* MAD_F_MLA(hi, lo, X[14], MAD_F(0x0bcbe352)); */
2065 /* MAD_F_MLA(hi, lo, X[15], -MAD_F(0x04cfb0e2)); */
2066 /* MAD_F_MLA(hi, lo, X[17], -MAD_F(0x0898c779)); */
2067 /* x[20] = x[33] = MAD_F_MLZ(hi, lo) - t3; */
2068 "move.l #0x0e313245, %%d1\n"
2069 "move.l #0x00b2aa3e, %%d2\n"
2070 "move.l #0x0d7e8807, %%d3\n"
2071 "mac.l %%d2, %%d0, %%acc0\n"
2072 "msac.l %%d1, %%d0, %%acc1\n"
2073 "msac.l %%d3, %%d0, (11*4, %[X]), %%d0, %%acc2\n"
2074 "msac.l %%d3, %%d0, %%acc0\n"
2075 "msac.l %%d2, %%d0, %%acc1\n"
2076 "msac.l %%d1, %%d0, (12*4, %[X]), %%d0, %%acc2\n"
2077 "mac.l %%d1, %%d0, %%acc0\n"
2078 "msac.l %%d3, %%d0, %%acc1\n"
2079 "mac.l %%d2, %%d0, ( 2*4, %[X]), %%d0, %%acc2\n"
2080 "move.l #0x03768962, %%d1\n"
2081 "move.l #0x0f426cb5, %%d2\n"
2082 "move.l #0x0bcbe352, %%d3\n"
2083 "mac.l %%d1, %%d0, %%acc0\n"
2084 "mac.l %%d3, %%d0, %%acc1\n"
2085 "mac.l %%d2, %%d0, ( 9*4, %[X]), %%d0, %%acc2\n"
2086 "msac.l %%d3, %%d0, %%acc0\n"
2087 "mac.l %%d2, %%d0, %%acc1\n"
2088 "mac.l %%d1, %%d0, (14*4, %[X]), %%d0, %%acc2\n"
2089 "mac.l %%d2, %%d0, %%acc0\n"
2090 "msac.l %%d1, %%d0, %%acc1\n"
2091 "mac.l %%d3, %%d0, ( 3*4, %[X]), %%d0, %%acc2\n"
2092 "move.l #0x0acf37ad, %%d1\n"
2093 "move.l #0x0f9ee890, %%d2\n"
2094 "move.l #0x04cfb0e2, %%d3\n"
2095 "msac.l %%d3, %%d0, %%acc0\n"
2096 "mac.l %%d2, %%d0, %%acc1\n"
2097 "mac.l %%d1, %%d0, ( 8*4, %[X]), %%d0, %%acc2\n"
2098 "mac.l %%d1, %%d0, %%acc0\n"
2099 "mac.l %%d3, %%d0, %%acc1\n"
2100 "mac.l %%d2, %%d0, (15*4, %[X]), %%d0, %%acc2\n"
2101 "msac.l %%d2, %%d0, %%acc0\n"
2102 "mac.l %%d1, %%d0, %%acc1\n"
2103 "msac.l %%d3, %%d0, ( 5*4, %[X]), %%d0, %%acc2\n"
2104 "move.l #0x0ffc19fd, %%d1\n"
2105 "move.l #0x0898c779, %%d2\n"
2106 "move.l #0x07635284, %%d3\n"
2107 "msac.l %%d3, %%d0, %%acc0\n"
2108 "msac.l %%d2, %%d0, %%acc1\n"
2109 "msac.l %%d1, %%d0, ( 6*4, %[X]), %%d0, %%acc2\n"
2110 "mac.l %%d2, %%d0, %%acc0\n"
2111 "msac.l %%d1, %%d0, %%acc1\n"
2112 "msac.l %%d3, %%d0, (17*4, %[X]), %%d0, %%acc2\n"
2113 "msac.l %%d1, %%d0, %%acc0\n"
2114 "mac.l %%d3, %%d0, %%acc1\n"
2115 "msac.l %%d2, %%d0, (12*4, %[t]), %%d0, %%acc2\n"
2116
2117 "movclr.l %%acc0, %%d6\n"
2118 "asl.l #3, %%d6\n"
2119 "add.l %%d5, %%d6\n"
2120 "move.l %%d6, (8*4, %[x])\n"
2121 "neg.l %%d6\n"
2122 "move.l %%d6, (9*4, %[x])\n"
2123
2124 "movclr.l %%acc1, %%d6\n"
2125 "asl.l #3, %%d6\n"
2126 "add.l %%d5, %%d6\n"
2127 "move.l %%d6, (21*4, %[x])\n"
2128 "move.l %%d6, (32*4, %[x])\n"
2129
2130 "movclr.l %%acc2, %%d6\n"
2131 "asl.l #3, %%d6\n"
2132 "sub.l %%d5, %%d6\n"
2133 "move.l %%d6, (20*4, %[x])\n"
2134 "move.l %%d6, (33*4, %[x])\n"
2135
2136 /* MAD_F_ML0(hi, lo, t12, -MAD_F(0x0ec835e8)); */
2137 /* MAD_F_MLA(hi, lo, t13, MAD_F(0x061f78aa)); */
2138 /* x[22] = x[31] = MAD_F_MLZ(hi, lo) + t0; */
2139 "move.l #0x0ec835e8, %%d1\n"
2140 "move.l #0x061f78aa, %%d2\n"
2141 "msac.l %%d1, %%d0, (13*4, %[t]), %%d3, %%acc0\n"
2142 "mac.l %%d2, %%d3, ( 1*4, %[x]), %%d4, %%acc0\n"
2143 "movclr.l %%acc0, %%d6\n"
2144 "asl.l #3, %%d6\n"
2145 "add.l (0*4, %[t]), %%d6\n"
2146 "move.l %%d6, (22*4, %[x])\n"
2147 "move.l %%d6, (31*4, %[x])\n"
2148
2149 /* MAD_F_ML0(hi, lo, t12, MAD_F(0x061f78aa)); */
2150 /* MAD_F_MLA(hi, lo, t13, MAD_F(0x0ec835e8)); */
2151 /* x[13] = -(x[4] = MAD_F_MLZ(hi, lo) + t4); */
2152 /* x[16] = -(x[1] = x[1] + t4); */
2153 /* x[25] = x[28] = x[25] + t4; */
2154 "mac.l %%d2, %%d0, (4*4, %[t]), %%d2, %%acc0\n"
2155 "mac.l %%d1, %%d3, ( %[X]), %%d0, %%acc0\n"
2156 "movclr.l %%acc0, %%d6\n"
2157 "asl.l #3, %%d6\n"
2158 "add.l %%d2, %%d6\n"
2159 "move.l %%d6, ( 4*4, %[x])\n"
2160 "neg.l %%d6\n"
2161 "move.l %%d6, (13*4, %[x])\n"
2162
2163 "add.l %%d2, %%d4\n"
2164 "move.l %%d4, ( 1*4, %[x])\n"
2165 "neg.l %%d4\n"
2166 "move.l %%d4, (16*4, %[x])\n"
2167
2168 "move.l (25*4, %[x]), %%d4\n"
2169 "add.l %%d2, %%d4\n"
2170 "move.l %%d4, (25*4, %[x])\n"
2171 "move.l %%d4, (28*4, %[x])\n"
2172
2173 /* MAD_F_ML0(hi, lo, X[0], MAD_F(0x0898c779)); */
2174 /* MAD_F_MLA(hi, lo, X[2], MAD_F(0x04cfb0e2)); */
2175 /* MAD_F_MLA(hi, lo, X[3], MAD_F(0x0bcbe352)); */
2176 /* MAD_F_MLA(hi, lo, X[5], MAD_F(0x00b2aa3e)); */
2177 /* MAD_F_MLA(hi, lo, X[6], MAD_F(0x0e313245)); */
2178 /* MAD_F_MLA(hi, lo, X[8], -MAD_F(0x03768962)); */
2179 /* MAD_F_MLA(hi, lo, X[9], MAD_F(0x0f9ee890)); */
2180 /* MAD_F_MLA(hi, lo, X[11], -MAD_F(0x07635284)); */
2181 /* MAD_F_MLA(hi, lo, X[12], MAD_F(0x0ffc19fd)); */
2182 /* MAD_F_MLA(hi, lo, X[14], -MAD_F(0x0acf37ad)); */
2183 /* MAD_F_MLA(hi, lo, X[15], MAD_F(0x0f426cb5)); */
2184 /* MAD_F_MLA(hi, lo, X[17], -MAD_F(0x0d7e8807)); */
2185 /* x[15] = -(x[2] = MAD_F_MLZ(hi, lo) + t5); */
2186 /* MAD_F_ML0(hi, lo, X[0], MAD_F(0x07635284)); */
2187 /* MAD_F_MLA(hi, lo, X[2], MAD_F(0x0acf37ad)); */
2188 /* MAD_F_MLA(hi, lo, X[3], MAD_F(0x03768962)); */
2189 /* MAD_F_MLA(hi, lo, X[5], MAD_F(0x0d7e8807)); */
2190 /* MAD_F_MLA(hi, lo, X[6], -MAD_F(0x00b2aa3e)); */
2191 /* MAD_F_MLA(hi, lo, X[8], MAD_F(0x0f426cb5)); */
2192 /* MAD_F_MLA(hi, lo, X[9], -MAD_F(0x04cfb0e2)); */
2193 /* MAD_F_MLA(hi, lo, X[11], MAD_F(0x0ffc19fd)); */
2194 /* MAD_F_MLA(hi, lo, X[12], -MAD_F(0x0898c779)); */
2195 /* MAD_F_MLA(hi, lo, X[14], MAD_F(0x0f9ee890)); */
2196 /* MAD_F_MLA(hi, lo, X[15], -MAD_F(0x0bcbe352)); */
2197 /* MAD_F_MLA(hi, lo, X[17], MAD_F(0x0e313245)); */
2198 /* x[14] = -(x[3] = MAD_F_MLZ(hi, lo) + t5); */
2199 /* MAD_F_ML0(hi, lo, X[0], -MAD_F(0x0ffc19fd)); */
2200 /* MAD_F_MLA(hi, lo, X[2], -MAD_F(0x0f9ee890)); */
2201 /* MAD_F_MLA(hi, lo, X[3], -MAD_F(0x0f426cb5)); */
2202 /* MAD_F_MLA(hi, lo, X[5], -MAD_F(0x0e313245)); */
2203 /* MAD_F_MLA(hi, lo, X[6], -MAD_F(0x0d7e8807)); */
2204 /* MAD_F_MLA(hi, lo, X[8], -MAD_F(0x0bcbe352)); */
2205 /* MAD_F_MLA(hi, lo, X[9], -MAD_F(0x0acf37ad)); */
2206 /* MAD_F_MLA(hi, lo, X[11], -MAD_F(0x0898c779)); */
2207 /* MAD_F_MLA(hi, lo, X[12], -MAD_F(0x07635284)); */
2208 /* MAD_F_MLA(hi, lo, X[14], -MAD_F(0x04cfb0e2)); */
2209 /* MAD_F_MLA(hi, lo, X[15], -MAD_F(0x03768962)); */
2210 /* MAD_F_MLA(hi, lo, X[17], -MAD_F(0x00b2aa3e)); */
2211 /* x[26] = x[27] = MAD_F_MLZ(hi, lo) + t5; */
2212 "move.l #0x0ffc19fd, %%d1\n"
2213 "move.l #0x0898c779, %%d2\n"
2214 "move.l #0x07635284, %%d3\n"
2215 "mac.l %%d2, %%d0, %%acc0\n"
2216 "mac.l %%d3, %%d0, %%acc1\n"
2217 "msac.l %%d1, %%d0, (11*4, %[X]), %%d0, %%acc2\n"
2218 "msac.l %%d3, %%d0, %%acc0\n"
2219 "mac.l %%d1, %%d0, %%acc1\n"
2220 "msac.l %%d2, %%d0, (12*4, %[X]), %%d0, %%acc2\n"
2221 "mac.l %%d1, %%d0, %%acc0\n"
2222 "msac.l %%d2, %%d0, %%acc1\n"
2223 "msac.l %%d3, %%d0, ( 2*4, %[X]), %%d0, %%acc2\n"
2224 "move.l #0x0acf37ad, %%d1\n"
2225 "move.l #0x0f9ee890, %%d2\n"
2226 "move.l #0x04cfb0e2, %%d3\n"
2227 "mac.l %%d3, %%d0, %%acc0\n"
2228 "mac.l %%d1, %%d0, %%acc1\n"
2229 "msac.l %%d2, %%d0, ( 9*4, %[X]), %%d0, %%acc2\n"
2230 "mac.l %%d2, %%d0, %%acc0\n"
2231 "msac.l %%d3, %%d0, %%acc1\n"
2232 "msac.l %%d1, %%d0, (14*4, %[X]), %%d0, %%acc2\n"
2233 "msac.l %%d1, %%d0, %%acc0\n"
2234 "mac.l %%d2, %%d0, %%acc1\n"
2235 "msac.l %%d3, %%d0, ( 3*4, %[X]), %%d0, %%acc2\n"
2236 "move.l #0x03768962, %%d1\n"
2237 "move.l #0x0f426cb5, %%d2\n"
2238 "move.l #0x0bcbe352, %%d3\n"
2239 "mac.l %%d3, %%d0, %%acc0\n"
2240 "mac.l %%d1, %%d0, %%acc1\n"
2241 "msac.l %%d2, %%d0, ( 8*4, %[X]), %%d0, %%acc2\n"
2242 "msac.l %%d1, %%d0, %%acc0\n"
2243 "mac.l %%d2, %%d0, %%acc1\n"
2244 "msac.l %%d3, %%d0, (15*4, %[X]), %%d0, %%acc2\n"
2245 "mac.l %%d2, %%d0, %%acc0\n"
2246 "msac.l %%d3, %%d0, %%acc1\n"
2247 "msac.l %%d1, %%d0, ( 5*4, %[X]), %%d0, %%acc2\n"
2248 "move.l #0x0e313245, %%d1\n"
2249 "move.l #0x00b2aa3e, %%d2\n"
2250 "move.l #0x0d7e8807, %%d3\n"
2251 "mac.l %%d2, %%d0, %%acc0\n"
2252 "mac.l %%d3, %%d0, %%acc1\n"
2253 "msac.l %%d1, %%d0, ( 6*4, %[X]), %%d0, %%acc2\n"
2254 "mac.l %%d1, %%d0, %%acc0\n"
2255 "msac.l %%d2, %%d0, %%acc1\n"
2256 "msac.l %%d3, %%d0, (17*4, %[X]), %%d0, %%acc2\n"
2257 "msac.l %%d3, %%d0, %%acc0\n"
2258 "mac.l %%d1, %%d0, %%acc1\n"
2259 "msac.l %%d2, %%d0, ( 5*4, %[t]), %%d6, %%acc2\n"
2260 "movclr.l %%acc0, %%d7\n"
2261 "asl.l #3, %%d7\n"
2262 "add.l %%d6, %%d7\n"
2263 "move.l %%d7, (2*4, %[x])\n"
2264 "neg.l %%d7\n"
2265 "move.l %%d7, (15*4, %[x])\n"
2266
2267 "movclr.l %%acc1, %%d7\n"
2268 "asl.l #3, %%d7\n"
2269 "add.l %%d6, %%d7\n"
2270 "move.l %%d7, (3*4, %[x])\n"
2271 "neg.l %%d7\n"
2272 "move.l %%d7, (14*4, %[x])\n"
2273
2274 "movclr.l %%acc2, %%d7\n"
2275 "asl.l #3, %%d7\n"
2276 "add.l %%d6, %%d7\n"
2277 "move.l %%d7, (26*4, %[x])\n"
2278 "move.l %%d7, (27*4, %[x])\n"
2279
2280 : : [X] "a" (X), [x] "a" (x), [t] "a" (t)
2281 : "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7");
2282 /* pfew */
2283 }
2284
2285 # else /* if defined(CPU_COLDFIRE) */
2286
2287 static inline
2288 void imdct36(mad_fixed_t const X[18], mad_fixed_t x[36])
2289 {
2290 mad_fixed_t t0, t1, t2, t3, t4, t5, t6, t7;
2291 mad_fixed_t t8, t9, t10, t11, t12, t13, t14, t15;
2292 register mad_fixed64hi_t hi;
2293 register mad_fixed64lo_t lo;
2294
2295 MAD_F_ML0(hi, lo, (t14 = X[1] - X[10]), -MAD_F(0x0ec835e8));
2296 MAD_F_MLA(hi, lo, (t15 = X[7] + X[16]), MAD_F(0x061f78aa));
2297 t4 = MAD_F_MLZ(hi, lo);
2298
2299 MAD_F_ML0(hi, lo, X[4], MAD_F(0x0ec835e8));
2300 MAD_F_MLA(hi, lo, X[13], MAD_F(0x061f78aa));
2301 t6 = MAD_F_MLZ(hi, lo);
2302
2303 MAD_F_MLA(hi, lo, t14, -MAD_F(0x061f78aa));
2304 MAD_F_MLA(hi, lo, t15, -MAD_F(0x0ec835e8));
2305 t0 = MAD_F_MLZ(hi, lo);
2306
2307 MAD_F_MLA(hi, lo, (t8 =X[0]-X[11]-X[12]), MAD_F(0x0216a2a2));
2308 MAD_F_MLA(hi, lo, (t9 =X[2]-X[ 9]-X[14]), MAD_F(0x09bd7ca0));
2309 MAD_F_MLA(hi, lo, (t10=X[3]-X[ 8]-X[15]), -MAD_F(0x0cb19346));
2310 MAD_F_MLA(hi, lo, (t11=X[5]-X[ 6]-X[17]), -MAD_F(0x0fdcf549));
2311 x[10] = -(x[7] = MAD_F_MLZ(hi, lo));
2312
2313 MAD_F_ML0(hi, lo, t8, -MAD_F(0x0cb19346));
2314 MAD_F_MLA(hi, lo, t9, MAD_F(0x0fdcf549));
2315 MAD_F_MLA(hi, lo, t10, MAD_F(0x0216a2a2));
2316 MAD_F_MLA(hi, lo, t11, -MAD_F(0x09bd7ca0));
2317 x[19] = x[34] = MAD_F_MLZ(hi, lo) - t0;
2318
2319 MAD_F_ML0(hi, lo, t8, MAD_F(0x09bd7ca0));
2320 MAD_F_MLA(hi, lo, t9, -MAD_F(0x0216a2a2));
2321 MAD_F_MLA(hi, lo, t10, MAD_F(0x0fdcf549));
2322 MAD_F_MLA(hi, lo, t11, -MAD_F(0x0cb19346));
2323 x[ 1] = MAD_F_MLZ(hi, lo);
2324
2325 MAD_F_ML0(hi, lo, t8, -MAD_F(0x0fdcf549));
2326 MAD_F_MLA(hi, lo, t9, -MAD_F(0x0cb19346));
2327 MAD_F_MLA(hi, lo, t10, -MAD_F(0x09bd7ca0));
2328 MAD_F_MLA(hi, lo, t11, -MAD_F(0x0216a2a2));
2329 x[25] = MAD_F_MLZ(hi, lo);
2330
2331 t12 = t8 - t10;
2332 t13 = t9 + t11;
2333
2334 MAD_F_ML0(hi, lo, X[1], -MAD_F(0x09bd7ca0));
2335 MAD_F_MLA(hi, lo, X[7], MAD_F(0x0216a2a2));
2336 MAD_F_MLA(hi, lo, X[10], -MAD_F(0x0fdcf549));
2337 MAD_F_MLA(hi, lo, X[16], MAD_F(0x0cb19346));
2338 t1 = MAD_F_MLZ(hi, lo) + t6;
2339
2340 MAD_F_ML0(hi, lo, X[1], -MAD_F(0x0216a2a2));
2341 MAD_F_MLA(hi, lo, X[7], -MAD_F(0x09bd7ca0));
2342 MAD_F_MLA(hi, lo, X[10], MAD_F(0x0cb19346));
2343 MAD_F_MLA(hi, lo, X[16], MAD_F(0x0fdcf549));
2344 t3 = MAD_F_MLZ(hi, lo);
2345
2346 MAD_F_ML0(hi, lo, X[1], -MAD_F(0x0fdcf549));
2347 MAD_F_MLA(hi, lo, X[7], -MAD_F(0x0cb19346));
2348 MAD_F_MLA(hi, lo, X[10], -MAD_F(0x09bd7ca0));
2349 MAD_F_MLA(hi, lo, X[16], -MAD_F(0x0216a2a2));
2350 t5 = MAD_F_MLZ(hi, lo) - t6;
2351
2352 MAD_F_ML0(hi, lo, X[0], MAD_F(0x03768962));
2353 MAD_F_MLA(hi, lo, X[2], MAD_F(0x0e313245));
2354 MAD_F_MLA(hi, lo, X[3], -MAD_F(0x0ffc19fd));
2355 MAD_F_MLA(hi, lo, X[5], -MAD_F(0x0acf37ad));
2356 MAD_F_MLA(hi, lo, X[6], MAD_F(0x04cfb0e2));
2357 MAD_F_MLA(hi, lo, X[8], -MAD_F(0x0898c779));
2358 MAD_F_MLA(hi, lo, X[9], MAD_F(0x0d7e8807));
2359 MAD_F_MLA(hi, lo, X[11], MAD_F(0x0f426cb5));
2360 MAD_F_MLA(hi, lo, X[12], -MAD_F(0x0bcbe352));
2361 MAD_F_MLA(hi, lo, X[14], MAD_F(0x00b2aa3e));
2362 MAD_F_MLA(hi, lo, X[15], -MAD_F(0x07635284));
2363 MAD_F_MLA(hi, lo, X[17], -MAD_F(0x0f9ee890));
2364 x[11] = -(x[6] = MAD_F_MLZ(hi, lo) + t1);
2365
2366 MAD_F_ML0(hi, lo, X[0], -MAD_F(0x0f426cb5));
2367 MAD_F_MLA(hi, lo, X[2], -MAD_F(0x00b2aa3e));
2368 MAD_F_MLA(hi, lo, X[3], MAD_F(0x0898c779));
2369 MAD_F_MLA(hi, lo, X[5], MAD_F(0x0f9ee890));
2370 MAD_F_MLA(hi, lo, X[6], MAD_F(0x0acf37ad));
2371 MAD_F_MLA(hi, lo, X[8], -MAD_F(0x07635284));
2372 MAD_F_MLA(hi, lo, X[9], -MAD_F(0x0e313245));
2373 MAD_F_MLA(hi, lo, X[11], -MAD_F(0x0bcbe352));
2374 MAD_F_MLA(hi, lo, X[12], -MAD_F(0x03768962));
2375 MAD_F_MLA(hi, lo, X[14], MAD_F(0x0d7e8807));
2376 MAD_F_MLA(hi, lo, X[15], MAD_F(0x0ffc19fd));
2377 MAD_F_MLA(hi, lo, X[17], MAD_F(0x04cfb0e2));
2378 x[23] = x[30] = MAD_F_MLZ(hi, lo) + t1;
2379
2380 MAD_F_ML0(hi, lo, X[0], -MAD_F(0x0bcbe352));
2381 MAD_F_MLA(hi, lo, X[2], MAD_F(0x0d7e8807));
2382 MAD_F_MLA(hi, lo, X[3], -MAD_F(0x07635284));
2383 MAD_F_MLA(hi, lo, X[5], MAD_F(0x04cfb0e2));
2384 MAD_F_MLA(hi, lo, X[6], MAD_F(0x0f9ee890));
2385 MAD_F_MLA(hi, lo, X[8], -MAD_F(0x0ffc19fd));
2386 MAD_F_MLA(hi, lo, X[9], -MAD_F(0x00b2aa3e));
2387 MAD_F_MLA(hi, lo, X[11], MAD_F(0x03768962));
2388 MAD_F_MLA(hi, lo, X[12], -MAD_F(0x0f426cb5));
2389 MAD_F_MLA(hi, lo, X[14], MAD_F(0x0e313245));
2390 MAD_F_MLA(hi, lo, X[15], MAD_F(0x0898c779));
2391 MAD_F_MLA(hi, lo, X[17], -MAD_F(0x0acf37ad));
2392 x[18] = x[35] = MAD_F_MLZ(hi, lo) - t1;
2393
2394 MAD_F_ML0(hi, lo, X[4], MAD_F(0x061f78aa));
2395 MAD_F_MLA(hi, lo, X[13], -MAD_F(0x0ec835e8));
2396 t3+= (t7 = MAD_F_MLZ(hi, lo));
2397 t4-= t7;
2398
2399 MAD_F_MLA(hi, lo, X[1], -MAD_F(0x0cb19346));
2400 MAD_F_MLA(hi, lo, X[7], MAD_F(0x0fdcf549));
2401 MAD_F_MLA(hi, lo, X[10], MAD_F(0x0216a2a2));
2402 MAD_F_MLA(hi, lo, X[16], -MAD_F(0x09bd7ca0));
2403 t2 = MAD_F_MLZ(hi, lo);
2404
2405 MAD_F_MLA(hi, lo, X[0], MAD_F(0x04cfb0e2));
2406 MAD_F_MLA(hi, lo, X[2], MAD_F(0x0ffc19fd));
2407 MAD_F_MLA(hi, lo, X[3], -MAD_F(0x0d7e8807));
2408 MAD_F_MLA(hi, lo, X[5], MAD_F(0x03768962));
2409 MAD_F_MLA(hi, lo, X[6], -MAD_F(0x0bcbe352));
2410 MAD_F_MLA(hi, lo, X[8], -MAD_F(0x0e313245));
2411 MAD_F_MLA(hi, lo, X[9], MAD_F(0x07635284));
2412 MAD_F_MLA(hi, lo, X[11], -MAD_F(0x0acf37ad));
2413 MAD_F_MLA(hi, lo, X[12], MAD_F(0x0f9ee890));
2414 MAD_F_MLA(hi, lo, X[14], MAD_F(0x0898c779));
2415 MAD_F_MLA(hi, lo, X[15], MAD_F(0x00b2aa3e));
2416 MAD_F_MLA(hi, lo, X[17], MAD_F(0x0f426cb5));
2417 x[12] = -(x[5] = MAD_F_MLZ(hi, lo));
2418
2419 MAD_F_ML0(hi, lo, X[0], MAD_F(0x0acf37ad));
2420 MAD_F_MLA(hi, lo, X[2], -MAD_F(0x0898c779));
2421 MAD_F_MLA(hi, lo, X[3], MAD_F(0x0e313245));
2422 MAD_F_MLA(hi, lo, X[5], -MAD_F(0x0f426cb5));
2423 MAD_F_MLA(hi, lo, X[6], -MAD_F(0x03768962));
2424 MAD_F_MLA(hi, lo, X[8], MAD_F(0x00b2aa3e));
2425 MAD_F_MLA(hi, lo, X[9], -MAD_F(0x0ffc19fd));
2426 MAD_F_MLA(hi, lo, X[11], MAD_F(0x0f9ee890));
2427 MAD_F_MLA(hi, lo, X[12], -MAD_F(0x04cfb0e2));
2428 MAD_F_MLA(hi, lo, X[14], MAD_F(0x07635284));
2429 MAD_F_MLA(hi, lo, X[15], MAD_F(0x0d7e8807));
2430 MAD_F_MLA(hi, lo, X[17], -MAD_F(0x0bcbe352));
2431 x[17] = -(x[0] = MAD_F_MLZ(hi, lo) + t2);
2432
2433 MAD_F_ML0(hi, lo, X[0], -MAD_F(0x0f9ee890));
2434 MAD_F_MLA(hi, lo, X[2], -MAD_F(0x07635284));
2435 MAD_F_MLA(hi, lo, X[3], -MAD_F(0x00b2aa3e));
2436 MAD_F_MLA(hi, lo, X[5], MAD_F(0x0bcbe352));
2437 MAD_F_MLA(hi, lo, X[6], MAD_F(0x0f426cb5));
2438 MAD_F_MLA(hi, lo, X[8], MAD_F(0x0d7e8807));
2439 MAD_F_MLA(hi, lo, X[9], MAD_F(0x0898c779));
2440 MAD_F_MLA(hi, lo, X[11], -MAD_F(0x04cfb0e2));
2441 MAD_F_MLA(hi, lo, X[12], -MAD_F(0x0acf37ad));
2442 MAD_F_MLA(hi, lo, X[14], -MAD_F(0x0ffc19fd));
2443 MAD_F_MLA(hi, lo, X[15], -MAD_F(0x0e313245));
2444 MAD_F_MLA(hi, lo, X[17], -MAD_F(0x03768962));
2445 x[24] = x[29] = MAD_F_MLZ(hi, lo) + t2;
2446
2447 MAD_F_ML0(hi, lo, X[0], MAD_F(0x00b2aa3e));
2448 MAD_F_MLA(hi, lo, X[2], MAD_F(0x03768962));
2449 MAD_F_MLA(hi, lo, X[3], -MAD_F(0x04cfb0e2));
2450 MAD_F_MLA(hi, lo, X[5], -MAD_F(0x07635284));
2451 MAD_F_MLA(hi, lo, X[6], MAD_F(0x0898c779));
2452 MAD_F_MLA(hi, lo, X[8], MAD_F(0x0acf37ad));
2453 MAD_F_MLA(hi, lo, X[9], -MAD_F(0x0bcbe352));
2454 MAD_F_MLA(hi, lo, X[11], -MAD_F(0x0d7e8807));
2455 MAD_F_MLA(hi, lo, X[12], MAD_F(0x0e313245));
2456 MAD_F_MLA(hi, lo, X[14], MAD_F(0x0f426cb5));
2457 MAD_F_MLA(hi, lo, X[15], -MAD_F(0x0f9ee890));
2458 MAD_F_MLA(hi, lo, X[17], -MAD_F(0x0ffc19fd));
2459 x[9] = -(x[8] = MAD_F_MLZ(hi, lo) + t3);
2460
2461 MAD_F_ML0(hi, lo, X[0], -MAD_F(0x0e313245));
2462 MAD_F_MLA(hi, lo, X[2], MAD_F(0x0bcbe352));
2463 MAD_F_MLA(hi, lo, X[3], MAD_F(0x0f9ee890));
2464 MAD_F_MLA(hi, lo, X[5], -MAD_F(0x0898c779));
2465 MAD_F_MLA(hi, lo, X[6], -MAD_F(0x0ffc19fd));
2466 MAD_F_MLA(hi, lo, X[8], MAD_F(0x04cfb0e2));
2467 MAD_F_MLA(hi, lo, X[9], MAD_F(0x0f426cb5));
2468 MAD_F_MLA(hi, lo, X[11], -MAD_F(0x00b2aa3e));
2469 MAD_F_MLA(hi, lo, X[12], -MAD_F(0x0d7e8807));
2470 MAD_F_MLA(hi, lo, X[14], -MAD_F(0x03768962));
2471 MAD_F_MLA(hi, lo, X[15], MAD_F(0x0acf37ad));
2472 MAD_F_MLA(hi, lo, X[17], MAD_F(0x07635284));
2473 x[21] = x[32] = MAD_F_MLZ(hi, lo) + t3;
2474
2475 MAD_F_ML0(hi, lo, X[0], -MAD_F(0x0d7e8807));
2476 MAD_F_MLA(hi, lo, X[2], MAD_F(0x0f426cb5));
2477 MAD_F_MLA(hi, lo, X[3], MAD_F(0x0acf37ad));
2478 MAD_F_MLA(hi, lo, X[5], -MAD_F(0x0ffc19fd));
2479 MAD_F_MLA(hi, lo, X[6], -MAD_F(0x07635284));
2480 MAD_F_MLA(hi, lo, X[8], MAD_F(0x0f9ee890));
2481 MAD_F_MLA(hi, lo, X[9], MAD_F(0x03768962));
2482 MAD_F_MLA(hi, lo, X[11], -MAD_F(0x0e313245));
2483 MAD_F_MLA(hi, lo, X[12], MAD_F(0x00b2aa3e));
2484 MAD_F_MLA(hi, lo, X[14], MAD_F(0x0bcbe352));
2485 MAD_F_MLA(hi, lo, X[15], -MAD_F(0x04cfb0e2));
2486 MAD_F_MLA(hi, lo, X[17], -MAD_F(0x0898c779));
2487 x[20] = x[33] = MAD_F_MLZ(hi, lo) - t3;
2488
2489 MAD_F_ML0(hi, lo, t12, -MAD_F(0x0ec835e8));
2490 MAD_F_MLA(hi, lo, t13, MAD_F(0x061f78aa));
2491 x[22] = x[31] = MAD_F_MLZ(hi, lo) + t0;
2492
2493 MAD_F_ML0(hi, lo, t12, MAD_F(0x061f78aa));
2494 MAD_F_MLA(hi, lo, t13, MAD_F(0x0ec835e8));
2495 x[13] = -(x[4] = MAD_F_MLZ(hi, lo) + t4);
2496 x[16] = -(x[1] = x[1] + t4);
2497 x[25] = x[28] = x[25] + t4;
2498
2499 MAD_F_ML0(hi, lo, X[0], MAD_F(0x0898c779));
2500 MAD_F_MLA(hi, lo, X[2], MAD_F(0x04cfb0e2));
2501 MAD_F_MLA(hi, lo, X[3], MAD_F(0x0bcbe352));
2502 MAD_F_MLA(hi, lo, X[5], MAD_F(0x00b2aa3e));
2503 MAD_F_MLA(hi, lo, X[6], MAD_F(0x0e313245));
2504 MAD_F_MLA(hi, lo, X[8], -MAD_F(0x03768962));
2505 MAD_F_MLA(hi, lo, X[9], MAD_F(0x0f9ee890));
2506 MAD_F_MLA(hi, lo, X[11], -MAD_F(0x07635284));
2507 MAD_F_MLA(hi, lo, X[12], MAD_F(0x0ffc19fd));
2508 MAD_F_MLA(hi, lo, X[14], -MAD_F(0x0acf37ad));
2509 MAD_F_MLA(hi, lo, X[15], MAD_F(0x0f426cb5));
2510 MAD_F_MLA(hi, lo, X[17], -MAD_F(0x0d7e8807));
2511 x[15] = -(x[2] = MAD_F_MLZ(hi, lo) + t5);
2512
2513 MAD_F_ML0(hi, lo, X[0], MAD_F(0x07635284));
2514 MAD_F_MLA(hi, lo, X[2], MAD_F(0x0acf37ad));
2515 MAD_F_MLA(hi, lo, X[3], MAD_F(0x03768962));
2516 MAD_F_MLA(hi, lo, X[5], MAD_F(0x0d7e8807));
2517 MAD_F_MLA(hi, lo, X[6], -MAD_F(0x00b2aa3e));
2518 MAD_F_MLA(hi, lo, X[8], MAD_F(0x0f426cb5));
2519 MAD_F_MLA(hi, lo, X[9], -MAD_F(0x04cfb0e2));
2520 MAD_F_MLA(hi, lo, X[11], MAD_F(0x0ffc19fd));
2521 MAD_F_MLA(hi, lo, X[12], -MAD_F(0x0898c779));
2522 MAD_F_MLA(hi, lo, X[14], MAD_F(0x0f9ee890));
2523 MAD_F_MLA(hi, lo, X[15], -MAD_F(0x0bcbe352));
2524 MAD_F_MLA(hi, lo, X[17], MAD_F(0x0e313245));
2525 x[14] = -(x[3] = MAD_F_MLZ(hi, lo) + t5);
2526
2527 MAD_F_ML0(hi, lo, X[0], -MAD_F(0x0ffc19fd));
2528 MAD_F_MLA(hi, lo, X[2], -MAD_F(0x0f9ee890));
2529 MAD_F_MLA(hi, lo, X[3], -MAD_F(0x0f426cb5));
2530 MAD_F_MLA(hi, lo, X[5], -MAD_F(0x0e313245));
2531 MAD_F_MLA(hi, lo, X[6], -MAD_F(0x0d7e8807));
2532 MAD_F_MLA(hi, lo, X[8], -MAD_F(0x0bcbe352));
2533 MAD_F_MLA(hi, lo, X[9], -MAD_F(0x0acf37ad));
2534 MAD_F_MLA(hi, lo, X[11], -MAD_F(0x0898c779));
2535 MAD_F_MLA(hi, lo, X[12], -MAD_F(0x07635284));
2536 MAD_F_MLA(hi, lo, X[14], -MAD_F(0x04cfb0e2));
2537 MAD_F_MLA(hi, lo, X[15], -MAD_F(0x03768962));
2538 MAD_F_MLA(hi, lo, X[17], -MAD_F(0x00b2aa3e));
2539 x[26] = x[27] = MAD_F_MLZ(hi, lo) + t5;
2540 }
2541 # endif /* CPU_COLDFIRE */
2542
2543 /*
2544 * NAME: III_imdct_l()
2545 * DESCRIPTION: perform IMDCT and windowing for long blocks
2546 */
2547 static
2548 void III_imdct_l(mad_fixed_t const X[18], mad_fixed_t z[36],
2549 unsigned int block_type)
2550 {
2551 unsigned int i;
2552
2553 /* IMDCT */
2554
2555 imdct36(X, z);
2556
2557 /* windowing */
2558
2559 switch (block_type) {
2560 case 0: /* normal window */
2561 # if 1
2562 /* loop unrolled implementation */
2563 for (i = 0; i < 36; i += 4) {
2564 z[i + 0] = mad_f_mul(z[i + 0], window_l[i + 0]);
2565 z[i + 1] = mad_f_mul(z[i + 1], window_l[i + 1]);
2566 z[i + 2] = mad_f_mul(z[i + 2], window_l[i + 2]);
2567 z[i + 3] = mad_f_mul(z[i + 3], window_l[i + 3]);
2568 }
2569 # else
2570 /* reference implementation */
2571 for (i = 0; i < 36; ++i) z[i] = mad_f_mul(z[i], window_l[i]);
2572 # endif
2573 break;
2574
2575 case 1: /* start block */
2576 for (i = 0; i < 18; i += 3) {
2577 z[i + 0] = mad_f_mul(z[i + 0], window_l[i + 0]);
2578 z[i + 1] = mad_f_mul(z[i + 1], window_l[i + 1]);
2579 z[i + 2] = mad_f_mul(z[i + 2], window_l[i + 2]);
2580 }
2581 /* (i = 18; i < 24; ++i) z[i] unchanged */
2582 for (i = 24; i < 30; ++i) z[i] = mad_f_mul(z[i], window_s[i - 18]);
2583 for (i = 30; i < 36; ++i) z[i] = 0;
2584 break;
2585
2586 case 3: /* stop block */
2587 for (i = 0; i < 6; ++i) z[i] = 0;
2588 for (i = 6; i < 12; ++i) z[i] = mad_f_mul(z[i], window_s[i - 6]);
2589 /* (i = 12; i < 18; ++i) z[i] unchanged */
2590 for (i = 18; i < 36; i += 3) {
2591 z[i + 0] = mad_f_mul(z[i + 0], window_l[i + 0]);
2592 z[i + 1] = mad_f_mul(z[i + 1], window_l[i + 1]);
2593 z[i + 2] = mad_f_mul(z[i + 2], window_l[i + 2]);
2594 }
2595 break;
2596 }
2597 }
2598 # endif /* FPM_ARM */
2599
2600 /*
2601 * NAME: III_imdct_s()
2602 * DESCRIPTION: perform IMDCT and windowing for short blocks
2603 */
2604
2605 # if defined(CPU_COLDFIRE)
2606 void III_imdct_s(mad_fixed_t const X[18], mad_fixed_t z[36]);
2607 #else
2608
2609 static
2610 void III_imdct_s(mad_fixed_t const X[18], mad_fixed_t z[36])
2611 {
2612 mad_fixed_t y[36], *yptr;
2613 mad_fixed_t const *wptr;
2614 int w, i;
2615 register mad_fixed64hi_t hi;
2616 register mad_fixed64lo_t lo;
2617
2618 /* IMDCT */
2619
2620 yptr = &y[0];
2621
2622 for (w = 0; w < 3; ++w) {
2623 register mad_fixed_t const (*s)[6];
2624
2625 s = imdct_s;
2626
2627 for (i = 0; i < 3; ++i) {
2628 MAD_F_ML0(hi, lo, X[0], (*s)[0]);
2629 MAD_F_MLA(hi, lo, X[1], (*s)[1]);
2630 MAD_F_MLA(hi, lo, X[2], (*s)[2]);
2631 MAD_F_MLA(hi, lo, X[3], (*s)[3]);
2632 MAD_F_MLA(hi, lo, X[4], (*s)[4]);
2633 MAD_F_MLA(hi, lo, X[5], (*s)[5]);
2634
2635 yptr[i + 0] = MAD_F_MLZ(hi, lo);
2636 yptr[5 - i] = -yptr[i + 0];
2637
2638 ++s;
2639
2640 MAD_F_ML0(hi, lo, X[0], (*s)[0]);
2641 MAD_F_MLA(hi, lo, X[1], (*s)[1]);
2642 MAD_F_MLA(hi, lo, X[2], (*s)[2]);
2643 MAD_F_MLA(hi, lo, X[3], (*s)[3]);
2644 MAD_F_MLA(hi, lo, X[4], (*s)[4]);
2645 MAD_F_MLA(hi, lo, X[5], (*s)[5]);
2646
2647 yptr[ i + 6] = MAD_F_MLZ(hi, lo);
2648 yptr[11 - i] = yptr[i + 6];
2649
2650 ++s;
2651 }
2652
2653 yptr += 12;
2654 X += 6;
2655 }
2656
2657 /* windowing, overlapping and concatenation */
2658
2659 yptr = &y[0];
2660 wptr = &window_s[0];
2661
2662 for (i = 0; i < 6; ++i) {
2663 z[i + 0] = 0;
2664 z[i + 6] = mad_f_mul(yptr[ 0 + 0], wptr[0]);
2665
2666 MAD_F_ML0(hi, lo, yptr[ 0 + 6], wptr[6]);
2667 MAD_F_MLA(hi, lo, yptr[12 + 0], wptr[0]);
2668
2669 z[i + 12] = MAD_F_MLZ(hi, lo);
2670
2671 MAD_F_ML0(hi, lo, yptr[12 + 6], wptr[6]);
2672 MAD_F_MLA(hi, lo, yptr[24 + 0], wptr[0]);
2673
2674 z[i + 18] = MAD_F_MLZ(hi, lo);
2675
2676 z[i + 24] = mad_f_mul(yptr[24 + 6], wptr[6]);
2677 z[i + 30] = 0;
2678
2679 ++yptr;
2680 ++wptr;
2681 }
2682 }
2683
2684 #endif
2685
2686 #ifdef CPU_ARM
2687 void III_overlap(mad_fixed_t const output[36], mad_fixed_t overlap[18],
2688 mad_fixed_t sample[18][32], unsigned int sb);
2689 #else
2690
2691 /*
2692 * NAME: III_overlap()
2693 * DESCRIPTION: perform overlap-add of windowed IMDCT outputs
2694 */
2695 static
2696 void III_overlap(mad_fixed_t const output[36], mad_fixed_t overlap[18],
2697 mad_fixed_t sample[18][32], unsigned int sb)
2698 {
2699 unsigned int i;
2700 for (i = 0; i < 18; ++i) {
2701 sample[i][sb] = output[i + 0] + overlap[i];
2702 overlap[i] = output[i + 18];
2703 }
2704 }
2705 #endif
2706
2707 /*
2708 * NAME: III_overlap_z()
2709 * DESCRIPTION: perform "overlap-add" of zero IMDCT outputs
2710 */
2711 static inline
2712 void III_overlap_z(mad_fixed_t overlap[18],
2713 mad_fixed_t sample[18][32], unsigned int sb)
2714 {
2715 unsigned int i;
2716 for (i = 0; i < 18; ++i) {
2717 sample[i][sb] = overlap[i];
2718 overlap[i] = 0;
2719 }
2720 }
2721
2722 /*
2723 * NAME: III_freqinver()
2724 * DESCRIPTION: perform subband frequency inversion for odd sample lines
2725 */
2726 static
2727 void III_freqinver(mad_fixed_t sample[18][32], unsigned int sb)
2728 {
2729 unsigned int i;
2730 for (i = 1; i < 18; i += 2)
2731 sample[i][sb] = -sample[i][sb];
2732 }
2733
2734 /*
2735 * NAME: III_decode()
2736 * DESCRIPTION: decode frame main_data
2737 */
2738 static
2739 enum mad_error III_decode(struct mad_bitptr *ptr, struct mad_frame *frame,
2740 struct sideinfo *si, unsigned int nch)
2741 {
2742 struct mad_header *header = &frame->header;
2743 unsigned int sfreqi, ngr, gr;
2744
2745 {
2746 unsigned int sfreq;
2747
2748 sfreq = header->samplerate;
2749 if (header->flags & MAD_FLAG_MPEG_2_5_EXT)
2750 sfreq *= 2;
2751
2752 /* 48000 => 0, 44100 => 1, 32000 => 2,
2753 24000 => 3, 22050 => 4, 16000 => 5 */
2754 sfreqi = ((sfreq >> 7) & 0x000f) +
2755 ((sfreq >> 15) & 0x0001) - 8;
2756
2757 if (header->flags & MAD_FLAG_MPEG_2_5_EXT)
2758 sfreqi += 3;
2759 }
2760
2761 /* scalefactors, Huffman decoding, requantization */
2762
2763 ngr = (header->flags & MAD_FLAG_LSF_EXT) ? 1 : 2;
2764
2765 for (gr = 0; gr < ngr; ++gr) {
2766 struct granule *granule = &si->gr[gr];
2767 unsigned char const *sfbwidth[2];
2768 mad_fixed_t xr[2][576];
2769 unsigned int ch;
2770 enum mad_error error;
2771
2772 for (ch = 0; ch < nch; ++ch) {
2773 struct channel *channel = &granule->ch[ch];
2774 unsigned int part2_length;
2775
2776 sfbwidth[ch] = sfbwidth_table[sfreqi].l;
2777 if (channel->block_type == 2) {
2778 sfbwidth[ch] = (channel->flags & mixed_block_flag) ?
2779 sfbwidth_table[sfreqi].m : sfbwidth_table[sfreqi].s;
2780 }
2781
2782 if (header->flags & MAD_FLAG_LSF_EXT) {
2783 part2_length = III_scalefactors_lsf(ptr, channel,
2784 ch == 0 ? 0 : &si->gr[1].ch[1],
2785 header->mode_extension);
2786 }
2787 else {
2788 part2_length = III_scalefactors(ptr, channel, &si->gr[0].ch[ch],
2789 gr == 0 ? 0 : si->scfsi[ch]);
2790 }
2791
2792 error = III_huffdecode(ptr, xr[ch], channel, sfbwidth[ch], part2_length);
2793 if (error)
2794 return error;
2795 }
2796
2797 /* joint stereo processing */
2798
2799 if (header->mode == MAD_MODE_JOINT_STEREO && header->mode_extension) {
2800 error = III_stereo(xr, granule, header, sfbwidth[0]);
2801 if (error)
2802 return error;
2803 }
2804
2805 /* reordering, alias reduction, IMDCT, overlap-add, frequency inversion */
2806
2807 for (ch = 0; ch < nch; ++ch) {
2808 struct channel const *channel = &granule->ch[ch];
2809 mad_fixed_t (*sample)[32] = &((*frame->sbsample)[ch][18 * gr]);
2810 unsigned int sb, l, i, sblimit;
2811 mad_fixed_t output[36];
2812
2813 if (channel->block_type == 2) {
2814 III_reorder(xr[ch], channel, sfbwidth[ch]);
2815
2816 # if !defined(OPT_STRICT)
2817 /*
2818 * According to ISO/IEC 11172-3, "Alias reduction is not applied for
2819 * granules with block_type == 2 (short block)." However, other
2820 * sources suggest alias reduction should indeed be performed on the
2821 * lower two subbands of mixed blocks. Most other implementations do
2822 * this, so by default we will too.
2823 */
2824 if (channel->flags & mixed_block_flag)
2825 III_aliasreduce(xr[ch], 36);
2826 # endif
2827 }
2828 else
2829 III_aliasreduce(xr[ch], 576);
2830
2831 l = 0;
2832
2833 /* subbands 0-1 */
2834
2835 if (channel->block_type != 2 || (channel->flags & mixed_block_flag)) {
2836 unsigned int block_type;
2837
2838 block_type = channel->block_type;
2839 if (channel->flags & mixed_block_flag)
2840 block_type = 0;
2841
2842 /* long blocks */
2843 for (sb = 0; sb < 2; ++sb, l += 18) {
2844 III_imdct_l(&xr[ch][l], output, block_type);
2845 III_overlap(output, (*frame->overlap)[ch][sb], sample, sb);
2846 }
2847 }
2848 else {
2849 /* short blocks */
2850 for (sb = 0; sb < 2; ++sb, l += 18) {
2851 III_imdct_s(&xr[ch][l], output);
2852 III_overlap(output, (*frame->overlap)[ch][sb], sample, sb);
2853 }
2854 }
2855
2856 III_freqinver(sample, 1);
2857
2858 /* (nonzero) subbands 2-31 */
2859
2860 /*
2861 i = 576;
2862 while (i > 36 && xr[ch][i - 1] == 0)
2863 --i;
2864 */
2865
2866 {
2867 /* saves ~600k cycles */
2868 mad_fixed_t *p = &xr[ch][576];
2869 mad_fixed_t tmp = xr[ch][35];
2870 xr[ch][35] = 1;
2871 while (!*--p);
2872 xr[ch][35] = tmp;
2873 i = p - &xr[ch][0] + 1;
2874 }
2875 sblimit = 32 - (576 - i) / 18;
2876
2877 if (channel->block_type != 2) {
2878 /* long blocks */
2879 for (sb = 2; sb < sblimit; ++sb, l += 18) {
2880 III_imdct_l(&xr[ch][l], output, channel->block_type);
2881 III_overlap(output, (*frame->overlap)[ch][sb], sample, sb);
2882
2883 if (sb & 1)
2884 III_freqinver(sample, sb);
2885 }
2886 }
2887 else {
2888 /* short blocks */
2889 for (sb = 2; sb < sblimit; ++sb, l += 18) {
2890 III_imdct_s(&xr[ch][l], output);
2891 III_overlap(output, (*frame->overlap)[ch][sb], sample, sb);
2892
2893 if (sb & 1)
2894 III_freqinver(sample, sb);
2895 }
2896 }
2897
2898 /* remaining (zero) subbands */
2899
2900 for (sb = sblimit; sb < 32; ++sb) {
2901 III_overlap_z((*frame->overlap)[ch][sb], sample, sb);
2902
2903 if (sb & 1)
2904 III_freqinver(sample, sb);
2905 }
2906 }
2907 }
2908
2909 return MAD_ERROR_NONE;
2910 }
2911
2912 /*
2913 * NAME: layer->III()
2914 * DESCRIPTION: decode a single Layer III frame
2915 */
2916 int mad_layer_III(struct mad_stream *stream, struct mad_frame *frame)
2917 {
2918 struct mad_header *header = &frame->header;
2919 unsigned int nch, priv_bitlen, next_md_begin = 0;
2920 unsigned int si_len, data_bitlen, md_len;
2921 unsigned int frame_space, frame_used, frame_free;
2922 struct mad_bitptr ptr;
2923 struct sideinfo si;
2924 enum mad_error error;
2925 int result = 0;
2926
2927 #if 0 /* rockbox: do not allocate */
2928 /* allocate Layer III dynamic structures */
2929 /* rockbox: not used. Both pointers are linked to an array in rockbox'
2930 * apps/codecs/mpa.c before calling this. */
2931 if (stream->main_data == 0) {
2932 stream->main_data = malloc(MAD_BUFFER_MDLEN);
2933 if (stream->main_data == 0) {
2934 stream->error = MAD_ERROR_NOMEM;
2935 return -1;
2936 }
2937 }
2938
2939 if (frame->overlap == 0) {
2940 frame->overlap = calloc(2 * 32 * 18, sizeof(mad_fixed_t));
2941 if (frame->overlap == 0) {
2942 stream->error = MAD_ERROR_NOMEM;
2943 return -1;
2944 }
2945 }
2946 #else
2947 /* rockbox: This should not happen. Return with error. */
2948 if ((stream->main_data == 0) || (frame->overlap == 0)) {
2949 stream->error = MAD_ERROR_NOMEM;
2950 return -1;
2951 }
2952 #endif /* rockbox */
2953
2954 nch = MAD_NCHANNELS(header);
2955 si_len = (header->flags & MAD_FLAG_LSF_EXT) ?
2956 (nch == 1 ? 9 : 17) : (nch == 1 ? 17 : 32);
2957
2958 /* check frame sanity */
2959
2960 if (stream->next_frame - mad_bit_nextbyte(&stream->ptr) <
2961 (signed int) si_len) {
2962 stream->error = MAD_ERROR_BADFRAMELEN;
2963 stream->md_len = 0;
2964 return -1;
2965 }
2966
2967 /* check CRC word */
2968
2969 if (header->flags & MAD_FLAG_PROTECTION) {
2970 header->crc_check =
2971 mad_bit_crc(stream->ptr, si_len * CHAR_BIT, header->crc_check);
2972
2973 if (header->crc_check != header->crc_target &&
2974 !(frame->options & MAD_OPTION_IGNORECRC)) {
2975 stream->error = MAD_ERROR_BADCRC;
2976 result = -1;
2977 }
2978 }
2979
2980 /* decode frame side information */
2981
2982 error = III_sideinfo(&stream->ptr, nch, header->flags & MAD_FLAG_LSF_EXT,
2983 &si, &data_bitlen, &priv_bitlen);
2984 if (error && result == 0) {
2985 stream->error = error;
2986 result = -1;
2987 }
2988
2989 header->flags |= priv_bitlen;
2990 header->private_bits |= si.private_bits;
2991
2992 /* find main_data of next frame */
2993
2994 {
2995 struct mad_bitptr peek;
2996 unsigned long header;
2997
2998 mad_bit_init(&peek, stream->next_frame);
2999
3000 header = mad_bit_read(&peek, 32);
3001 if ((header & 0xffe60000L) /* syncword | layer */ == 0xffe20000L) {
3002 if (!(header & 0x00010000L)) /* protection_bit */
3003 mad_bit_skip(&peek, 16); /* crc_check */
3004
3005 next_md_begin =
3006 mad_bit_read(&peek, (header & 0x00080000L) /* ID */ ? 9 : 8);
3007 }
3008
3009 mad_bit_finish(&peek);
3010 }
3011
3012 /* find main_data of this frame */
3013
3014 frame_space = stream->next_frame - mad_bit_nextbyte(&stream->ptr);
3015
3016 if (next_md_begin > si.main_data_begin + frame_space)
3017 next_md_begin = 0;
3018
3019 md_len = si.main_data_begin + frame_space - next_md_begin;
3020
3021 frame_used = 0;
3022
3023 if (si.main_data_begin == 0) {
3024 ptr = stream->ptr;
3025 stream->md_len = 0;
3026
3027 frame_used = md_len;
3028 }
3029 else {
3030 if (si.main_data_begin > stream->md_len) {
3031 if (result == 0) {
3032 stream->error = MAD_ERROR_BADDATAPTR;
3033 result = -1;
3034 }
3035 }
3036 else {
3037 mad_bit_init(&ptr,
3038 *stream->main_data + stream->md_len - si.main_data_begin);
3039
3040 if (md_len > si.main_data_begin) {
3041 assert(stream->md_len + md_len -
3042 si.main_data_begin <= MAD_BUFFER_MDLEN);
3043
3044 memcpy(*stream->main_data + stream->md_len,
3045 mad_bit_nextbyte(&stream->ptr),
3046 frame_used = md_len - si.main_data_begin);
3047 stream->md_len += frame_used;
3048 }
3049 }
3050 }
3051
3052 frame_free = frame_space - frame_used;
3053
3054 /* decode main_data */
3055
3056 if (result == 0) {
3057 error = III_decode(&ptr, frame, &si, nch);
3058 if (error) {
3059 stream->error = error;
3060 result = -1;
3061 }
3062
3063 /* designate ancillary bits */
3064
3065 stream->anc_ptr = ptr;
3066 stream->anc_bitlen = md_len * CHAR_BIT - data_bitlen;
3067 }
3068
3069 # if 0 && defined(DEBUG)
3070 fprintf(stderr,
3071 "main_data_begin:%u, md_len:%u, frame_free:%u, "
3072 "data_bitlen:%u, anc_bitlen: %u\n",
3073 si.main_data_begin, md_len, frame_free,
3074 data_bitlen, stream->anc_bitlen);
3075 # endif
3076
3077 /* preload main_data buffer with up to 511 bytes for next frame(s) */
3078
3079 if (frame_free >= next_md_begin) {
3080 memcpy(*stream->main_data,
3081 stream->next_frame - next_md_begin, next_md_begin);
3082 stream->md_len = next_md_begin;
3083 }
3084 else {
3085 if (md_len < si.main_data_begin) {
3086 unsigned int extra;
3087
3088 extra = si.main_data_begin - md_len;
3089 if (extra + frame_free > next_md_begin)
3090 extra = next_md_begin - frame_free;
3091
3092 if (extra < stream->md_len) {
3093 memmove(*stream->main_data,
3094 *stream->main_data + stream->md_len - extra, extra);
3095 stream->md_len = extra;
3096 }
3097 }
3098 else
3099 stream->md_len = 0;
3100
3101 memcpy(*stream->main_data + stream->md_len,
3102 stream->next_frame - frame_free, frame_free);
3103 stream->md_len += frame_free;
3104 }
3105
3106 return result;
3107 }
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