memops.c 23.6 KB
Newer Older
sletz's avatar
sletz committed
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
/*
    Copyright (C) 2000 Paul Davis 

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#define _ISOC9X_SOURCE  1
#define _ISOC99_SOURCE  1

#define __USE_ISOC9X    1
#define __USE_ISOC99    1

#include <stdio.h>
#include <string.h>
#include <math.h>
#include <memory.h>
#include <stdlib.h>
31
#include <stdint.h>
sletz's avatar
sletz committed
32
#include <limits.h>
sletz's avatar
sletz committed
33
#ifdef __linux__
sletz's avatar
sletz committed
34
#include <endian.h>
sletz's avatar
sletz committed
35
#endif
sletz's avatar
sletz committed
36
37
#include "memops.h"

sletz's avatar
sletz committed
38
39
#if defined (__SSE2__) && !defined (__sun__)
#include <emmintrin.h>
40
41
42
#ifdef __SSE4_1__
#include <smmintrin.h>
#endif
sletz's avatar
sletz committed
43
44
#endif

45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
/* Notes about these *_SCALING values.

   the MAX_<N>BIT values are floating point. when multiplied by
   a full-scale normalized floating point sample value (-1.0..+1.0)
   they should give the maxium value representable with an integer
   sample type of N bits. Note that this is asymmetric. Sample ranges 
   for signed integer, 2's complement values are -(2^(N-1) to +(2^(N-1)-1)

   Complications
   -------------
   If we use +2^(N-1) for the scaling factors, we run into a problem:

   if we start with a normalized float value of -1.0, scaling
   to 24 bits would give -8388608 (-2^23), which is ideal.
   But with +1.0, we get +8388608, which is technically out of range.

   We never multiply a full range normalized value by this constant,
   but we could multiply it by a positive value that is close enough to +1.0
   to produce a value > +(2^(N-1)-1.

   There is no way around this paradox without wasting CPU cycles to determine
   which scaling factor to use (i.e. determine if its negative or not,
   use the right factor).

   So, for now (October 2008) we use 2^(N-1)-1 as the scaling factor.
*/

#define SAMPLE_24BIT_SCALING  8388607.0f
#define SAMPLE_16BIT_SCALING  32767.0f

/* these are just values to use if the floating point value was out of range
   
   advice from Fons Adriaensen: make the limits symmetrical
 */

#define SAMPLE_24BIT_MAX  8388607  
#define SAMPLE_24BIT_MIN  -8388607 
#define SAMPLE_24BIT_MAX_F  8388607.0f  
#define SAMPLE_24BIT_MIN_F  -8388607.0f 

#define SAMPLE_16BIT_MAX  32767
#define SAMPLE_16BIT_MIN  -32767
#define SAMPLE_16BIT_MAX_F  32767.0f
#define SAMPLE_16BIT_MIN_F  -32767.0f

/* these mark the outer edges of the range considered "within" range
   for a floating point sample value. values outside (and on the boundaries) 
   of this range will be clipped before conversion; values within this 
   range will be scaled to appropriate values for the target sample
   type.
*/

#define NORMALIZED_FLOAT_MIN -1.0f
#define NORMALIZED_FLOAT_MAX  1.0f
sletz's avatar
sletz committed
99

100
101
102
/* define this in case we end up on a platform that is missing
   the real lrintf functions
*/
sletz's avatar
sletz committed
103
104
105

#define f_round(f) lrintf(f)

106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
#define float_16(s, d)\
	if ((s) <= NORMALIZED_FLOAT_MIN) {\
		(d) = SAMPLE_16BIT_MIN;\
	} else if ((s) >= NORMALIZED_FLOAT_MAX) {\
		(d) = SAMPLE_16BIT_MAX;\
	} else {\
		(d) = f_round ((s) * SAMPLE_16BIT_SCALING);\
	}

/* call this when "s" has already been scaled (e.g. when dithering)
 */

#define float_16_scaled(s, d)\
        if ((s) <= SAMPLE_16BIT_MIN_F) {\
		(d) = SAMPLE_16BIT_MIN_F;\
	} else if ((s) >= SAMPLE_16BIT_MAX_F) {	\
		(d) = SAMPLE_16BIT_MAX;\
	} else {\
	        (d) = f_round ((s));\
	}

#define float_24u32(s, d) \
	if ((s) <= NORMALIZED_FLOAT_MIN) {\
		(d) = SAMPLE_24BIT_MIN << 8;\
	} else if ((s) >= NORMALIZED_FLOAT_MAX) {\
		(d) = SAMPLE_24BIT_MAX << 8;\
	} else {\
		(d) = f_round ((s) * SAMPLE_24BIT_SCALING) << 8;\
	}

/* call this when "s" has already been scaled (e.g. when dithering)
 */

#define float_24u32_scaled(s, d)\
        if ((s) <= SAMPLE_24BIT_MIN_F) {\
		(d) = SAMPLE_24BIT_MIN << 8;\
	} else if ((s) >= SAMPLE_24BIT_MAX_F) {	\
		(d) = SAMPLE_24BIT_MAX << 8;		\
	} else {\
		(d) = f_round ((s)) << 8; \
	}

#define float_24(s, d) \
	if ((s) <= NORMALIZED_FLOAT_MIN) {\
		(d) = SAMPLE_24BIT_MIN;\
	} else if ((s) >= NORMALIZED_FLOAT_MAX) {\
		(d) = SAMPLE_24BIT_MAX;\
	} else {\
		(d) = f_round ((s) * SAMPLE_24BIT_SCALING);\
	}

/* call this when "s" has already been scaled (e.g. when dithering)
 */

#define float_24_scaled(s, d)\
        if ((s) <= SAMPLE_24BIT_MIN_F) {\
		(d) = SAMPLE_24BIT_MIN;\
	} else if ((s) >= SAMPLE_24BIT_MAX_F) {	\
		(d) = SAMPLE_24BIT_MAX;		\
	} else {\
		(d) = f_round ((s)); \
	}


170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
#if defined (__SSE2__) && !defined (__sun__)

/* generates same as _mm_set_ps(1.f, 1.f, 1f., 1f) but faster  */
static inline __m128 gen_one(void)
{
    volatile __m128i x;
    __m128i ones = _mm_cmpeq_epi32(x, x);
    return (__m128)_mm_slli_epi32 (_mm_srli_epi32(ones, 25), 23);
}

static inline __m128 clip(__m128 s, __m128 min, __m128 max)
{
    return _mm_min_ps(max, _mm_max_ps(s, min));
}

static inline __m128i float_24_sse(__m128 s)
{
    const __m128 upper_bound = gen_one(); /* NORMALIZED_FLOAT_MAX */
    const __m128 lower_bound = _mm_sub_ps(_mm_setzero_ps(), upper_bound);

    __m128 clipped = clip(s, lower_bound, upper_bound);
    __m128 scaled = _mm_mul_ps(clipped, _mm_set1_ps(SAMPLE_24BIT_SCALING));
    return _mm_cvtps_epi32(scaled);
}
#endif

sletz's avatar
sletz committed
196
/* Linear Congruential noise generator. From the music-dsp list
197
198
 * less random than rand(), but good enough and 10x faster 
 */
sletz's avatar
sletz committed
199
static unsigned int seed = 22222;
sletz's avatar
sletz committed
200
201
202
203
204
205

inline unsigned int fast_rand() {
	seed = (seed * 96314165) + 907633515;
	return seed;
}

206
207
208
/* functions for native float sample data */

void sample_move_floatLE_sSs (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip) {
209
210
#if __BYTE_ORDER == __LITTLE_ENDIAN
    char *d = (char*)dst;
211
	while (nsamples--) {
212
213
214
215
        *d++ = src[3];
        *d++ = src[2];
        *d++ = src[1];
        *d++ = src[0];
216
217
		src += src_skip;
	}
218
219
220
221
222
223
224
225
#else
    // Matching byte order
    while (nsamples--) {
        *dst = *((float *) src);
        dst++;
        src += src_skip;
    }
#endif
226
227
228
}

void sample_move_dS_floatLE (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state) {
229
#if __BYTE_ORDER == __LITTLE_ENDIAN
230
231
232
233
234
	while (nsamples--) {
		*((float *) dst) = *src;
		dst += dst_skip;
		src++;
	}
235
236
237
238
239
240
241
242
243
244
#else
    char *d = (char*)dst;
	while (nsamples--) {
        *d++ = src[3];
        *d++ = src[2];
        *d++ = src[1];
        *d++ = src[0];
		src += src_skip;
	}
#endif
245
246
}

247
/* NOTES on function naming:
248

249
   foo_bar_d<TYPE>_s<TYPE>
250

251
252
   the "d<TYPE>" component defines the destination type for the operation
   the "s<TYPE>" component defines the source type for the operation
253

254
255
256
257
258
259
260
261
262
263
   TYPE can be one of:
   
   S      - sample is a jack_default_audio_sample_t, currently (October 2008) a 32 bit floating point value
   Ss     - like S but reverse endian from the host CPU
   32u24  - sample is an signed 32 bit integer value, but data is in upper 24 bits only
   32u24s - like 32u24 but reverse endian from the host CPU
   24     - sample is an signed 24 bit integer value
   24s    - like 24 but reverse endian from the host CPU
   16     - sample is an signed 16 bit integer value
   16s    - like 16 but reverse endian from the host CPU
sletz's avatar
sletz committed
264

265
266
267
268
269
270
271
272
   For obvious reasons, the reverse endian versions only show as source types.

   This covers all known sample formats at 16 bits or larger.
*/   

/* functions for native integer sample data */

void sample_move_d32u24_sSs (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)
sletz's avatar
sletz committed
273
{
274
	int32_t z;
275
276
277
278
279
280
281
282
283
284
285
286
287
    
    union {
        jack_default_audio_sample_t f;
        char c[4];
    } t;
 	
    while (nsamples--) {
        t.c[0] = *((char*)src + 3);
        t.c[1] = *((char*)src + 2);
        t.c[2] = *((char*)src + 1);
        t.c[3] = *((char*)src + 0);
		float_24u32 (t.f, z);
        *((int32_t *) dst) = z;
sletz's avatar
sletz committed
288
289
290
291
292
		dst += dst_skip;
		src++;
	}
}	

sletz's avatar
sletz committed
293
294
void sample_move_d32u24_sS (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)
{
sletz's avatar
sletz committed
295
296
297
298
299
300
301
302
303
304
305
#if defined (__SSE2__) && !defined (__sun__)
	__m128 int_max = _mm_set1_ps(SAMPLE_24BIT_MAX_F);
	__m128 int_min = _mm_sub_ps(_mm_setzero_ps(), int_max);
	__m128 factor = int_max;

	unsigned long unrolled = nsamples / 4;
	nsamples = nsamples & 3;

	while (unrolled--) {
		__m128 in = _mm_load_ps(src);
		__m128 scaled = _mm_mul_ps(in, factor);
306
		__m128 clipped = clip(scaled, int_min, int_max);
sletz's avatar
sletz committed
307
308
309
310

		__m128i y = _mm_cvttps_epi32(clipped);
		__m128i shifted = _mm_slli_epi32(y, 8);

311
312
313
314
315
316
#ifdef __SSE4_1__
		*(int32_t*)dst              = _mm_extract_epi32(shifted, 0);
		*(int32_t*)(dst+dst_skip)   = _mm_extract_epi32(shifted, 1);
		*(int32_t*)(dst+2*dst_skip) = _mm_extract_epi32(shifted, 2);
		*(int32_t*)(dst+3*dst_skip) = _mm_extract_epi32(shifted, 3);
#else
sletz's avatar
sletz committed
317
318
319
320
321
		__m128i shuffled1 = _mm_shuffle_epi32(shifted, _MM_SHUFFLE(0, 3, 2, 1));
		__m128i shuffled2 = _mm_shuffle_epi32(shifted, _MM_SHUFFLE(1, 0, 3, 2));
		__m128i shuffled3 = _mm_shuffle_epi32(shifted, _MM_SHUFFLE(2, 1, 0, 3));

		_mm_store_ss((float*)dst, (__m128)shifted);
322
323
324
325

		_mm_store_ss((float*)(dst+dst_skip), (__m128)shuffled1);
		_mm_store_ss((float*)(dst+2*dst_skip), (__m128)shuffled2);
		_mm_store_ss((float*)(dst+3*dst_skip), (__m128)shuffled3);
326
#endif
327
		dst += 4*dst_skip;
sletz's avatar
sletz committed
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344

		src+= 4;
	}

	while (nsamples--) {
		__m128 in = _mm_load_ss(src);
		__m128 scaled = _mm_mul_ss(in, factor);
		__m128 clipped = _mm_min_ss(int_max, _mm_max_ss(scaled, int_min));

		int y = _mm_cvttss_si32(clipped);
		*((int *) dst) = y<<8;

		dst += dst_skip;
		src++;
	}

#else
sletz's avatar
sletz committed
345
	while (nsamples--) {
346
		float_24u32 (*src, *((int32_t*) dst));
sletz's avatar
sletz committed
347
348
349
		dst += dst_skip;
		src++;
	}
sletz's avatar
sletz committed
350
#endif
sletz's avatar
sletz committed
351
352
}	

sletz's avatar
sletz committed
353
354
355
356
void sample_move_dS_s32u24s (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip)
{
	/* ALERT: signed sign-extension portability !!! */

357
358
	const jack_default_audio_sample_t scaling = 1.0/SAMPLE_24BIT_SCALING;

sletz's avatar
sletz committed
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
	while (nsamples--) {
		int x;
#if __BYTE_ORDER == __LITTLE_ENDIAN
		x = (unsigned char)(src[0]);
		x <<= 8;
		x |= (unsigned char)(src[1]);
		x <<= 8;
		x |= (unsigned char)(src[2]);
		x <<= 8;
		x |= (unsigned char)(src[3]);
#elif __BYTE_ORDER == __BIG_ENDIAN
		x = (unsigned char)(src[3]);
		x <<= 8;
		x |= (unsigned char)(src[2]);
		x <<= 8;
		x |= (unsigned char)(src[1]);
		x <<= 8;
		x |= (unsigned char)(src[0]);
#endif
378
		*dst = (x >> 8) * scaling;
sletz's avatar
sletz committed
379
380
381
382
383
		dst++;
		src += src_skip;
	}
}	

sletz's avatar
sletz committed
384
385
void sample_move_dS_s32u24 (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip)
{
sletz's avatar
sletz committed
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
#if defined (__SSE2__) && !defined (__sun__)
	unsigned long unrolled = nsamples / 4;
	static float inv_sample_max_24bit = 1.0 / SAMPLE_24BIT_SCALING;
	__m128 factor = _mm_set1_ps(inv_sample_max_24bit);
	while (unrolled--)
	{
		int i1 = *((int *) src);
		src+= src_skip;
		int i2 = *((int *) src);
		src+= src_skip;
		int i3 = *((int *) src);
		src+= src_skip;
		int i4 = *((int *) src);
		src+= src_skip;

401
		__m128i src = _mm_set_epi32(i4, i3, i2, i1);
sletz's avatar
sletz committed
402
403
404
405
406
407
408
409
410
411
412
413
		__m128i shifted = _mm_srai_epi32(src, 8);

		__m128 as_float = _mm_cvtepi32_ps(shifted);
		__m128 divided = _mm_mul_ps(as_float, factor);

		_mm_storeu_ps(dst, divided);

		dst += 4;
	}
	nsamples = nsamples & 3;
#endif

sletz's avatar
sletz committed
414
415
	/* ALERT: signed sign-extension portability !!! */

416
	const jack_default_audio_sample_t scaling = 1.0/SAMPLE_24BIT_SCALING;
sletz's avatar
sletz committed
417
	while (nsamples--) {
418
		*dst = (*((int *) src) >> 8) * scaling;
sletz's avatar
sletz committed
419
420
421
422
423
		dst++;
		src += src_skip;
	}
}	

sletz's avatar
sletz committed
424
425
void sample_move_d24_sSs (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)
{
426
	int32_t z;
427
428
429
430
    union {
        jack_default_audio_sample_t f;
        char c[4];
    } t;
sletz's avatar
sletz committed
431
432

	while (nsamples--) {
433
434
435
436
437
438
        t.c[0] = *((char*)src + 3);
        t.c[1] = *((char*)src + 2);
        t.c[2] = *((char*)src + 1);
        t.c[3] = *((char*)src + 0);
		float_24 (t.f, z);
        
sletz's avatar
sletz committed
439
440
441
442
#if __BYTE_ORDER == __LITTLE_ENDIAN
		dst[0]=(char)(z);
		dst[1]=(char)(z>>8);
		dst[2]=(char)(z>>16);
443
444
445
446
#elif __BYTE_ORDER == __BIG_ENDIAN
		dst[0]=(char)(z>>16);
		dst[1]=(char)(z>>8);
		dst[2]=(char)(z);
sletz's avatar
sletz committed
447
448
449
450
451
452
#endif
		dst += dst_skip;
		src++;
	}
}	

sletz's avatar
sletz committed
453
454
void sample_move_d24_sS (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)
{
455
456
457
458
459
460
461
462
#if defined (__SSE2__) && !defined (__sun__)
	_MM_SET_ROUNDING_MODE(_MM_ROUND_NEAREST);
	while (nsamples >= 4) {
		int i;
		int32_t z[4];
		__m128 samples = _mm_loadu_ps(src);
		__m128i converted = float_24_sse(samples);

463
464
465
466
467
468
#ifdef __SSE4_1__
		z[0] = _mm_extract_epi32(converted, 0);
		z[1] = _mm_extract_epi32(converted, 1);
		z[2] = _mm_extract_epi32(converted, 2);
		z[3] = _mm_extract_epi32(converted, 3);
#else
469
470
471
472
473
474
475
476
477
478
479
480
481
		__m128i shuffled1 = _mm_shuffle_epi32(converted, _MM_SHUFFLE(0, 3, 2, 1));
		__m128i shuffled2 = _mm_shuffle_epi32(converted, _MM_SHUFFLE(1, 0, 3, 2));
		__m128i shuffled3 = _mm_shuffle_epi32(converted, _MM_SHUFFLE(2, 1, 0, 3));

		_mm_store_ss((float*)z, (__m128)converted);
		_mm_store_ss((float*)z+1, (__m128)shuffled1);
		_mm_store_ss((float*)z+2, (__m128)shuffled2);
		_mm_store_ss((float*)z+3, (__m128)shuffled3);

		for (i = 0; i != 4; ++i) {
			memcpy (dst, z+i, 3);
			dst += dst_skip;
		}
482
483
#endif

484
485
486
487
488
489
490
		nsamples -= 4;
		src += 4;
	}
#endif

    int32_t z;

sletz's avatar
sletz committed
491
	while (nsamples--) {
492
		float_24 (*src, z);
sletz's avatar
sletz committed
493
#if __BYTE_ORDER == __LITTLE_ENDIAN
494
		memcpy (dst, &z, 3);
sletz's avatar
sletz committed
495
#elif __BYTE_ORDER == __BIG_ENDIAN
496
		memcpy (dst, (char *)&z + 1, 3);
sletz's avatar
sletz committed
497
498
499
500
#endif
		dst += dst_skip;
		src++;
	}
501
}
sletz's avatar
sletz committed
502

sletz's avatar
sletz committed
503
504
505
506
void sample_move_dS_s24s (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip)
{
	/* ALERT: signed sign-extension portability !!! */

507
	const jack_default_audio_sample_t scaling = 1.0/SAMPLE_24BIT_SCALING;
sletz's avatar
sletz committed
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
	while (nsamples--) {
		int x;
#if __BYTE_ORDER == __LITTLE_ENDIAN
		x = (unsigned char)(src[0]);
		x <<= 8;
		x |= (unsigned char)(src[1]);
		x <<= 8;
		x |= (unsigned char)(src[2]);
		/* correct sign bit and the rest of the top byte */
		if (src[0] & 0x80) {
			x |= 0xff << 24;
		}
#elif __BYTE_ORDER == __BIG_ENDIAN
		x = (unsigned char)(src[2]);
		x <<= 8;
		x |= (unsigned char)(src[1]);
		x <<= 8;
		x |= (unsigned char)(src[0]);
		/* correct sign bit and the rest of the top byte */
sletz's avatar
sletz committed
527
		if (src[2] & 0x80) {
sletz's avatar
sletz committed
528
529
530
			x |= 0xff << 24;
		}
#endif
531
		*dst = x * scaling;
sletz's avatar
sletz committed
532
533
534
		dst++;
		src += src_skip;
	}
535
}
sletz's avatar
sletz committed
536

sletz's avatar
sletz committed
537
538
void sample_move_dS_s24 (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip)
{
539
540
541
542
	const jack_default_audio_sample_t scaling = 1.f/SAMPLE_24BIT_SCALING;

#if defined (__SSE2__) && !defined (__sun__)
	const __m128 scaling_block = _mm_set_ps1(scaling);
543
	while (nsamples >= 4) {
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
		int x0, x1, x2, x3;

		memcpy((char*)&x0 + 1, src, 3);
		memcpy((char*)&x1 + 1, src+src_skip, 3);
		memcpy((char*)&x2 + 1, src+2*src_skip, 3);
		memcpy((char*)&x3 + 1, src+3*src_skip, 3);
		src += 4 * src_skip;

		const __m128i block_i = _mm_set_epi32(x3, x2, x1, x0);
		const __m128i shifted = _mm_srai_epi32(block_i, 8);
		const __m128 converted = _mm_cvtepi32_ps (shifted);
		const __m128 scaled = _mm_mul_ps(converted, scaling_block);
		_mm_storeu_ps(dst, scaled);
		dst += 4;
		nsamples -= 4;
	}
sletz's avatar
sletz committed
560
#endif
sletz's avatar
sletz committed
561
562
563
564
565
566
567
568
569

	while (nsamples--) {
		int x;
#if __BYTE_ORDER == __LITTLE_ENDIAN
		memcpy((char*)&x + 1, src, 3);
#elif __BYTE_ORDER == __BIG_ENDIAN
		memcpy(&x, src, 3);
#endif
		x >>= 8;
570
		*dst = x * scaling;
sletz's avatar
sletz committed
571
572
573
		dst++;
		src += src_skip;
	}
574
}
sletz's avatar
sletz committed
575

sletz's avatar
sletz committed
576

577
void sample_move_d16_sSs (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)	
sletz's avatar
sletz committed
578
{
579
	int16_t tmp;
580
581
582
583
    union {
        jack_default_audio_sample_t f;
        char c[4];
    } t;
sletz's avatar
sletz committed
584
585

	while (nsamples--) {
586
587
588
589
590
        t.c[0] = *((char*)src + 3);
        t.c[1] = *((char*)src + 2);
        t.c[2] = *((char*)src + 1);
        t.c[3] = *((char*)src + 0);

591
		// float_16 (*src, tmp);
sletz's avatar
sletz committed
592

593
		if (t.f <= NORMALIZED_FLOAT_MIN) {
594
			tmp = SAMPLE_16BIT_MIN;
595
		} else if (t.f >= NORMALIZED_FLOAT_MAX) {
596
			tmp = SAMPLE_16BIT_MAX;
sletz's avatar
sletz committed
597
		} else {
598
			tmp = (int16_t) f_round (t.f * SAMPLE_16BIT_SCALING);
sletz's avatar
sletz committed
599
		}
sletz's avatar
sletz committed
600

601
        *((int16_t *) dst) = tmp;
sletz's avatar
sletz committed
602
603
604
605
606
		dst += dst_skip;
		src++;
	}
}

607
void sample_move_d16_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)	
sletz's avatar
sletz committed
608
609
{
	while (nsamples--) {
610
		float_16 (*src, *((int16_t*) dst));
sletz's avatar
sletz committed
611
612
613
614
615
		dst += dst_skip;
		src++;
	}
}

616
void sample_move_dither_rect_d16_sSs (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)	
sletz's avatar
sletz committed
617
618
{
	jack_default_audio_sample_t val;
619
	int16_t      tmp;
620
621
622
623
    union {
        jack_default_audio_sample_t f;
        char c[4];
    } t;
sletz's avatar
sletz committed
624
625

	while (nsamples--) {
626
627
628
629
630
        t.c[0] = *((char*)src + 3);
        t.c[1] = *((char*)src + 2);
        t.c[2] = *((char*)src + 1);
        t.c[3] = *((char*)src + 0);
		val = (t.f * SAMPLE_16BIT_SCALING) + fast_rand() / (float) UINT_MAX - 0.5f;
631
		float_16_scaled (val, tmp);
632
        *((int16_t *) dst) = tmp;
sletz's avatar
sletz committed
633
634
635
636
637
		dst += dst_skip;
		src++;
	}
}

638
void sample_move_dither_rect_d16_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)	
sletz's avatar
sletz committed
639
640
641
642
{
	jack_default_audio_sample_t val;

	while (nsamples--) {
643
644
		val = (*src * SAMPLE_16BIT_SCALING) + fast_rand() / (float)UINT_MAX - 0.5f;
		float_16_scaled (val, *((int16_t*) dst));
sletz's avatar
sletz committed
645
646
647
648
649
		dst += dst_skip;
		src++;
	}
}

650
void sample_move_dither_tri_d16_sSs (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)	
sletz's avatar
sletz committed
651
{
652
653
	jack_default_audio_sample_t val;
	int16_t      tmp;
654
655
656
657
    union {
        jack_default_audio_sample_t f;
        char c[4];
    } t;
sletz's avatar
sletz committed
658
659

	while (nsamples--) {
660
661
662
663
664
        t.c[0] = *((char*)src + 3);
        t.c[1] = *((char*)src + 2);
        t.c[2] = *((char*)src + 1);
        t.c[3] = *((char*)src + 0);
        val = (t.f * SAMPLE_16BIT_SCALING) + ((float)fast_rand() + (float)fast_rand()) / (float)UINT_MAX - 1.0f;
665
		float_16_scaled (val, tmp);
666
        *((int16_t *) dst) = tmp;
sletz's avatar
sletz committed
667
668
669
670
671
		dst += dst_skip;
		src++;
	}
}

672
void sample_move_dither_tri_d16_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)	
sletz's avatar
sletz committed
673
{
674
	jack_default_audio_sample_t val;
sletz's avatar
sletz committed
675
676

	while (nsamples--) {
677
678
		val = (*src * SAMPLE_16BIT_SCALING) + ((float)fast_rand() + (float)fast_rand()) / (float)UINT_MAX - 1.0f;
		float_16_scaled (val, *((int16_t*) dst));
sletz's avatar
sletz committed
679
680
681
682
683
		dst += dst_skip;
		src++;
	}
}

684
void sample_move_dither_shaped_d16_sSs (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)	
sletz's avatar
sletz committed
685
686
687
688
689
690
691
{
	jack_default_audio_sample_t     x;
	jack_default_audio_sample_t     xe; /* the innput sample - filtered error */
	jack_default_audio_sample_t     xp; /* x' */
	float        r;
	float        rm1 = state->rm1;
	unsigned int idx = state->idx;
692
	int16_t      tmp;
693
694
695
696
    union {
        jack_default_audio_sample_t f;
        char c[4];
    } t;
sletz's avatar
sletz committed
697
698

	while (nsamples--) {
699
700
701
702
703
704
        t.c[0] = *((char*)src + 3);
        t.c[1] = *((char*)src + 2);
        t.c[2] = *((char*)src + 1);
        t.c[3] = *((char*)src + 0);

		x = t.f * SAMPLE_16BIT_SCALING;
705
		r = ((float)fast_rand() + (float)fast_rand())  / (float)UINT_MAX - 1.0f;
sletz's avatar
sletz committed
706
707
708
709
710
711
712
713
714
715
716
		/* Filter the error with Lipshitz's minimally audible FIR:
		   [2.033 -2.165 1.959 -1.590 0.6149] */
		xe = x
		     - state->e[idx] * 2.033f
		     + state->e[(idx - 1) & DITHER_BUF_MASK] * 2.165f
		     - state->e[(idx - 2) & DITHER_BUF_MASK] * 1.959f
		     + state->e[(idx - 3) & DITHER_BUF_MASK] * 1.590f
		     - state->e[(idx - 4) & DITHER_BUF_MASK] * 0.6149f;
		xp = xe + r - rm1;
		rm1 = r;

717
		float_16_scaled (xp, tmp);
sletz's avatar
sletz committed
718
719
720

		/* Intrinsic z^-1 delay */
		idx = (idx + 1) & DITHER_BUF_MASK;
721
		state->e[idx] = xp - xe;
722
        *((int16_t *) dst) = tmp;
sletz's avatar
sletz committed
723
724
725
726
727
728
729
		dst += dst_skip;
		src++;
	}
	state->rm1 = rm1;
	state->idx = idx;
}

730
void sample_move_dither_shaped_d16_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)	
sletz's avatar
sletz committed
731
732
733
734
735
736
737
738
739
{
	jack_default_audio_sample_t     x;
	jack_default_audio_sample_t     xe; /* the innput sample - filtered error */
	jack_default_audio_sample_t     xp; /* x' */
	float        r;
	float        rm1 = state->rm1;
	unsigned int idx = state->idx;

	while (nsamples--) {
740
741
		x = *src * SAMPLE_16BIT_SCALING;
		r = ((float)fast_rand() + (float)fast_rand()) / (float)UINT_MAX - 1.0f;
sletz's avatar
sletz committed
742
743
744
745
746
747
748
749
750
751
752
		/* Filter the error with Lipshitz's minimally audible FIR:
		   [2.033 -2.165 1.959 -1.590 0.6149] */
		xe = x
		     - state->e[idx] * 2.033f
		     + state->e[(idx - 1) & DITHER_BUF_MASK] * 2.165f
		     - state->e[(idx - 2) & DITHER_BUF_MASK] * 1.959f
		     + state->e[(idx - 3) & DITHER_BUF_MASK] * 1.590f
		     - state->e[(idx - 4) & DITHER_BUF_MASK] * 0.6149f;
		xp = xe + r - rm1;
		rm1 = r;

753
		float_16_scaled (xp, *((int16_t*) dst));
sletz's avatar
sletz committed
754
755
756

		/* Intrinsic z^-1 delay */
		idx = (idx + 1) & DITHER_BUF_MASK;
757
		state->e[idx] = *((int16_t*) dst) - xe;
sletz's avatar
sletz committed
758
759
760
761
762
763
764
765

		dst += dst_skip;
		src++;
	}
	state->rm1 = rm1;
	state->idx = idx;
}

766
void sample_move_dS_s16s (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip) 	
sletz's avatar
sletz committed
767
768
{
	short z;
769
	const jack_default_audio_sample_t scaling = 1.0/SAMPLE_16BIT_SCALING;
sletz's avatar
sletz committed
770
771
772
773
774
775
776
777
778
779
780
781

	/* ALERT: signed sign-extension portability !!! */
	while (nsamples--) {
#if __BYTE_ORDER == __LITTLE_ENDIAN
		z = (unsigned char)(src[0]);
		z <<= 8;
		z |= (unsigned char)(src[1]);
#elif __BYTE_ORDER == __BIG_ENDIAN
		z = (unsigned char)(src[1]);
		z <<= 8;
		z |= (unsigned char)(src[0]);
#endif
782
		*dst = z * scaling;
sletz's avatar
sletz committed
783
784
785
786
787
		dst++;
		src += src_skip;
	}
}	

sletz's avatar
sletz committed
788
789
790
void sample_move_dS_s16 (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip) 
{
	/* ALERT: signed sign-extension portability !!! */
791
	const jack_default_audio_sample_t scaling = 1.0/SAMPLE_16BIT_SCALING;
sletz's avatar
sletz committed
792
	while (nsamples--) {
793
		*dst = (*((short *) src)) * scaling;
sletz's avatar
sletz committed
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
		dst++;
		src += src_skip;
	}
}	

void memset_interleave (char *dst, char val, unsigned long bytes, 
			unsigned long unit_bytes, 
			unsigned long skip_bytes) 
{
	switch (unit_bytes) {
	case 1:
		while (bytes--) {
			*dst = val;
			dst += skip_bytes;
		}
		break;
	case 2:
		while (bytes) {
			*((short *) dst) = (short) val;
			dst += skip_bytes;
			bytes -= 2;
		}
		break;
	case 4:		    
		while (bytes) {
			*((int *) dst) = (int) val;
			dst += skip_bytes;
			bytes -= 4;
		}
		break;
	default:
		while (bytes) {
			memset(dst, val, unit_bytes);
			dst += skip_bytes;
			bytes -= unit_bytes;
		}
		break;
	}
}

/* COPY FUNCTIONS: used to move data from an input channel to an
   output channel. Note that we assume that the skip distance
   is the same for both channels. This is completely fine
   unless the input and output were on different audio interfaces that
   were interleaved differently. We don't try to handle that.
*/

void 
memcpy_fake (char *dst, char *src, unsigned long src_bytes, unsigned long foo, unsigned long bar)
{
	memcpy (dst, src, src_bytes);
}

void 
memcpy_interleave_d16_s16 (char *dst, char *src, unsigned long src_bytes,
			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)
{
	while (src_bytes) {
		*((short *) dst) = *((short *) src);
		dst += dst_skip_bytes;
		src += src_skip_bytes;
		src_bytes -= 2;
	}
}

void 
memcpy_interleave_d24_s24 (char *dst, char *src, unsigned long src_bytes,
			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)
{
	while (src_bytes) {
		memcpy(dst, src, 3);
		dst += dst_skip_bytes;
		src += src_skip_bytes;
		src_bytes -= 3;
	}
}

void 
memcpy_interleave_d32_s32 (char *dst, char *src, unsigned long src_bytes,
			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)
{
	while (src_bytes) {
		*((int *) dst) = *((int *) src);
		dst += dst_skip_bytes;
		src += src_skip_bytes;
		src_bytes -= 4;
	}
}
882