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22#include <linux/time.h>
23#include <linux/export.h>
24#include <sound/core.h>
25#include <sound/pcm.h>
26
27#include "pcm_local.h"
28
29#define SND_PCM_FORMAT_UNKNOWN (-1)
30
31
32
33
34struct pcm_format_data {
35 unsigned char width;
36 unsigned char phys;
37 signed char le;
38 signed char signd;
39 unsigned char silence[8];
40};
41
42
43#define INT __force int
44
45static bool valid_format(snd_pcm_format_t format)
46{
47 return (INT)format >= 0 && (INT)format <= (INT)SNDRV_PCM_FORMAT_LAST;
48}
49
50static const struct pcm_format_data pcm_formats[(INT)SNDRV_PCM_FORMAT_LAST+1] = {
51 [SNDRV_PCM_FORMAT_S8] = {
52 .width = 8, .phys = 8, .le = -1, .signd = 1,
53 .silence = {},
54 },
55 [SNDRV_PCM_FORMAT_U8] = {
56 .width = 8, .phys = 8, .le = -1, .signd = 0,
57 .silence = { 0x80 },
58 },
59 [SNDRV_PCM_FORMAT_S16_LE] = {
60 .width = 16, .phys = 16, .le = 1, .signd = 1,
61 .silence = {},
62 },
63 [SNDRV_PCM_FORMAT_S16_BE] = {
64 .width = 16, .phys = 16, .le = 0, .signd = 1,
65 .silence = {},
66 },
67 [SNDRV_PCM_FORMAT_U16_LE] = {
68 .width = 16, .phys = 16, .le = 1, .signd = 0,
69 .silence = { 0x00, 0x80 },
70 },
71 [SNDRV_PCM_FORMAT_U16_BE] = {
72 .width = 16, .phys = 16, .le = 0, .signd = 0,
73 .silence = { 0x80, 0x00 },
74 },
75 [SNDRV_PCM_FORMAT_S24_LE] = {
76 .width = 24, .phys = 32, .le = 1, .signd = 1,
77 .silence = {},
78 },
79 [SNDRV_PCM_FORMAT_S24_BE] = {
80 .width = 24, .phys = 32, .le = 0, .signd = 1,
81 .silence = {},
82 },
83 [SNDRV_PCM_FORMAT_U24_LE] = {
84 .width = 24, .phys = 32, .le = 1, .signd = 0,
85 .silence = { 0x00, 0x00, 0x80 },
86 },
87 [SNDRV_PCM_FORMAT_U24_BE] = {
88 .width = 24, .phys = 32, .le = 0, .signd = 0,
89 .silence = { 0x00, 0x80, 0x00, 0x00 },
90 },
91 [SNDRV_PCM_FORMAT_S32_LE] = {
92 .width = 32, .phys = 32, .le = 1, .signd = 1,
93 .silence = {},
94 },
95 [SNDRV_PCM_FORMAT_S32_BE] = {
96 .width = 32, .phys = 32, .le = 0, .signd = 1,
97 .silence = {},
98 },
99 [SNDRV_PCM_FORMAT_U32_LE] = {
100 .width = 32, .phys = 32, .le = 1, .signd = 0,
101 .silence = { 0x00, 0x00, 0x00, 0x80 },
102 },
103 [SNDRV_PCM_FORMAT_U32_BE] = {
104 .width = 32, .phys = 32, .le = 0, .signd = 0,
105 .silence = { 0x80, 0x00, 0x00, 0x00 },
106 },
107 [SNDRV_PCM_FORMAT_FLOAT_LE] = {
108 .width = 32, .phys = 32, .le = 1, .signd = -1,
109 .silence = {},
110 },
111 [SNDRV_PCM_FORMAT_FLOAT_BE] = {
112 .width = 32, .phys = 32, .le = 0, .signd = -1,
113 .silence = {},
114 },
115 [SNDRV_PCM_FORMAT_FLOAT64_LE] = {
116 .width = 64, .phys = 64, .le = 1, .signd = -1,
117 .silence = {},
118 },
119 [SNDRV_PCM_FORMAT_FLOAT64_BE] = {
120 .width = 64, .phys = 64, .le = 0, .signd = -1,
121 .silence = {},
122 },
123 [SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE] = {
124 .width = 32, .phys = 32, .le = 1, .signd = -1,
125 .silence = {},
126 },
127 [SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE] = {
128 .width = 32, .phys = 32, .le = 0, .signd = -1,
129 .silence = {},
130 },
131 [SNDRV_PCM_FORMAT_MU_LAW] = {
132 .width = 8, .phys = 8, .le = -1, .signd = -1,
133 .silence = { 0x7f },
134 },
135 [SNDRV_PCM_FORMAT_A_LAW] = {
136 .width = 8, .phys = 8, .le = -1, .signd = -1,
137 .silence = { 0x55 },
138 },
139 [SNDRV_PCM_FORMAT_IMA_ADPCM] = {
140 .width = 4, .phys = 4, .le = -1, .signd = -1,
141 .silence = {},
142 },
143 [SNDRV_PCM_FORMAT_G723_24] = {
144 .width = 3, .phys = 3, .le = -1, .signd = -1,
145 .silence = {},
146 },
147 [SNDRV_PCM_FORMAT_G723_40] = {
148 .width = 5, .phys = 5, .le = -1, .signd = -1,
149 .silence = {},
150 },
151 [SNDRV_PCM_FORMAT_DSD_U8] = {
152 .width = 8, .phys = 8, .le = 1, .signd = 0,
153 .silence = { 0x69 },
154 },
155 [SNDRV_PCM_FORMAT_DSD_U16_LE] = {
156 .width = 16, .phys = 16, .le = 1, .signd = 0,
157 .silence = { 0x69, 0x69 },
158 },
159 [SNDRV_PCM_FORMAT_DSD_U32_LE] = {
160 .width = 32, .phys = 32, .le = 1, .signd = 0,
161 .silence = { 0x69, 0x69, 0x69, 0x69 },
162 },
163 [SNDRV_PCM_FORMAT_DSD_U16_BE] = {
164 .width = 16, .phys = 16, .le = 0, .signd = 0,
165 .silence = { 0x69, 0x69 },
166 },
167 [SNDRV_PCM_FORMAT_DSD_U32_BE] = {
168 .width = 32, .phys = 32, .le = 0, .signd = 0,
169 .silence = { 0x69, 0x69, 0x69, 0x69 },
170 },
171
172 [SNDRV_PCM_FORMAT_MPEG] = {
173 .le = -1, .signd = -1,
174 },
175 [SNDRV_PCM_FORMAT_GSM] = {
176 .le = -1, .signd = -1,
177 },
178 [SNDRV_PCM_FORMAT_S20_LE] = {
179 .width = 20, .phys = 32, .le = 1, .signd = 1,
180 .silence = {},
181 },
182 [SNDRV_PCM_FORMAT_S20_BE] = {
183 .width = 20, .phys = 32, .le = 0, .signd = 1,
184 .silence = {},
185 },
186 [SNDRV_PCM_FORMAT_U20_LE] = {
187 .width = 20, .phys = 32, .le = 1, .signd = 0,
188 .silence = { 0x00, 0x00, 0x08, 0x00 },
189 },
190 [SNDRV_PCM_FORMAT_U20_BE] = {
191 .width = 20, .phys = 32, .le = 0, .signd = 0,
192 .silence = { 0x00, 0x08, 0x00, 0x00 },
193 },
194
195 [SNDRV_PCM_FORMAT_SPECIAL] = {
196 .le = -1, .signd = -1,
197 },
198 [SNDRV_PCM_FORMAT_S24_3LE] = {
199 .width = 24, .phys = 24, .le = 1, .signd = 1,
200 .silence = {},
201 },
202 [SNDRV_PCM_FORMAT_S24_3BE] = {
203 .width = 24, .phys = 24, .le = 0, .signd = 1,
204 .silence = {},
205 },
206 [SNDRV_PCM_FORMAT_U24_3LE] = {
207 .width = 24, .phys = 24, .le = 1, .signd = 0,
208 .silence = { 0x00, 0x00, 0x80 },
209 },
210 [SNDRV_PCM_FORMAT_U24_3BE] = {
211 .width = 24, .phys = 24, .le = 0, .signd = 0,
212 .silence = { 0x80, 0x00, 0x00 },
213 },
214 [SNDRV_PCM_FORMAT_S20_3LE] = {
215 .width = 20, .phys = 24, .le = 1, .signd = 1,
216 .silence = {},
217 },
218 [SNDRV_PCM_FORMAT_S20_3BE] = {
219 .width = 20, .phys = 24, .le = 0, .signd = 1,
220 .silence = {},
221 },
222 [SNDRV_PCM_FORMAT_U20_3LE] = {
223 .width = 20, .phys = 24, .le = 1, .signd = 0,
224 .silence = { 0x00, 0x00, 0x08 },
225 },
226 [SNDRV_PCM_FORMAT_U20_3BE] = {
227 .width = 20, .phys = 24, .le = 0, .signd = 0,
228 .silence = { 0x08, 0x00, 0x00 },
229 },
230 [SNDRV_PCM_FORMAT_S18_3LE] = {
231 .width = 18, .phys = 24, .le = 1, .signd = 1,
232 .silence = {},
233 },
234 [SNDRV_PCM_FORMAT_S18_3BE] = {
235 .width = 18, .phys = 24, .le = 0, .signd = 1,
236 .silence = {},
237 },
238 [SNDRV_PCM_FORMAT_U18_3LE] = {
239 .width = 18, .phys = 24, .le = 1, .signd = 0,
240 .silence = { 0x00, 0x00, 0x02 },
241 },
242 [SNDRV_PCM_FORMAT_U18_3BE] = {
243 .width = 18, .phys = 24, .le = 0, .signd = 0,
244 .silence = { 0x02, 0x00, 0x00 },
245 },
246 [SNDRV_PCM_FORMAT_G723_24_1B] = {
247 .width = 3, .phys = 8, .le = -1, .signd = -1,
248 .silence = {},
249 },
250 [SNDRV_PCM_FORMAT_G723_40_1B] = {
251 .width = 5, .phys = 8, .le = -1, .signd = -1,
252 .silence = {},
253 },
254};
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263
264int snd_pcm_format_signed(snd_pcm_format_t format)
265{
266 int val;
267 if (!valid_format(format))
268 return -EINVAL;
269 if ((val = pcm_formats[(INT)format].signd) < 0)
270 return -EINVAL;
271 return val;
272}
273EXPORT_SYMBOL(snd_pcm_format_signed);
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281
282int snd_pcm_format_unsigned(snd_pcm_format_t format)
283{
284 int val;
285
286 val = snd_pcm_format_signed(format);
287 if (val < 0)
288 return val;
289 return !val;
290}
291EXPORT_SYMBOL(snd_pcm_format_unsigned);
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298
299int snd_pcm_format_linear(snd_pcm_format_t format)
300{
301 return snd_pcm_format_signed(format) >= 0;
302}
303EXPORT_SYMBOL(snd_pcm_format_linear);
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311
312int snd_pcm_format_little_endian(snd_pcm_format_t format)
313{
314 int val;
315 if (!valid_format(format))
316 return -EINVAL;
317 if ((val = pcm_formats[(INT)format].le) < 0)
318 return -EINVAL;
319 return val;
320}
321EXPORT_SYMBOL(snd_pcm_format_little_endian);
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329
330int snd_pcm_format_big_endian(snd_pcm_format_t format)
331{
332 int val;
333
334 val = snd_pcm_format_little_endian(format);
335 if (val < 0)
336 return val;
337 return !val;
338}
339EXPORT_SYMBOL(snd_pcm_format_big_endian);
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347
348int snd_pcm_format_width(snd_pcm_format_t format)
349{
350 int val;
351 if (!valid_format(format))
352 return -EINVAL;
353 if ((val = pcm_formats[(INT)format].width) == 0)
354 return -EINVAL;
355 return val;
356}
357EXPORT_SYMBOL(snd_pcm_format_width);
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365
366int snd_pcm_format_physical_width(snd_pcm_format_t format)
367{
368 int val;
369 if (!valid_format(format))
370 return -EINVAL;
371 if ((val = pcm_formats[(INT)format].phys) == 0)
372 return -EINVAL;
373 return val;
374}
375EXPORT_SYMBOL(snd_pcm_format_physical_width);
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385ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples)
386{
387 int phys_width = snd_pcm_format_physical_width(format);
388 if (phys_width < 0)
389 return -EINVAL;
390 return samples * phys_width / 8;
391}
392EXPORT_SYMBOL(snd_pcm_format_size);
393
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398
399
400const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format)
401{
402 if (!valid_format(format))
403 return NULL;
404 if (! pcm_formats[(INT)format].phys)
405 return NULL;
406 return pcm_formats[(INT)format].silence;
407}
408EXPORT_SYMBOL(snd_pcm_format_silence_64);
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420int snd_pcm_format_set_silence(snd_pcm_format_t format, void *data, unsigned int samples)
421{
422 int width;
423 unsigned char *dst;
424 const unsigned char *pat;
425
426 if (!valid_format(format))
427 return -EINVAL;
428 if (samples == 0)
429 return 0;
430 width = pcm_formats[(INT)format].phys;
431 pat = pcm_formats[(INT)format].silence;
432 if (! width)
433 return -EINVAL;
434
435 if (pcm_formats[(INT)format].signd == 1 || width <= 8) {
436 unsigned int bytes = samples * width / 8;
437 memset(data, *pat, bytes);
438 return 0;
439 }
440
441 width /= 8;
442 dst = data;
443#if 0
444 while (samples--) {
445 memcpy(dst, pat, width);
446 dst += width;
447 }
448#else
449
450 switch (width) {
451 case 2:
452 while (samples--) {
453 memcpy(dst, pat, 2);
454 dst += 2;
455 }
456 break;
457 case 3:
458 while (samples--) {
459 memcpy(dst, pat, 3);
460 dst += 3;
461 }
462 break;
463 case 4:
464 while (samples--) {
465 memcpy(dst, pat, 4);
466 dst += 4;
467 }
468 break;
469 case 8:
470 while (samples--) {
471 memcpy(dst, pat, 8);
472 dst += 8;
473 }
474 break;
475 }
476#endif
477 return 0;
478}
479EXPORT_SYMBOL(snd_pcm_format_set_silence);
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489
490int snd_pcm_hw_limit_rates(struct snd_pcm_hardware *hw)
491{
492 int i;
493 for (i = 0; i < (int)snd_pcm_known_rates.count; i++) {
494 if (hw->rates & (1 << i)) {
495 hw->rate_min = snd_pcm_known_rates.list[i];
496 break;
497 }
498 }
499 for (i = (int)snd_pcm_known_rates.count - 1; i >= 0; i--) {
500 if (hw->rates & (1 << i)) {
501 hw->rate_max = snd_pcm_known_rates.list[i];
502 break;
503 }
504 }
505 return 0;
506}
507EXPORT_SYMBOL(snd_pcm_hw_limit_rates);
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515
516unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate)
517{
518 unsigned int i;
519
520 for (i = 0; i < snd_pcm_known_rates.count; i++)
521 if (snd_pcm_known_rates.list[i] == rate)
522 return 1u << i;
523 return SNDRV_PCM_RATE_KNOT;
524}
525EXPORT_SYMBOL(snd_pcm_rate_to_rate_bit);
526
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533
534unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit)
535{
536 unsigned int i;
537
538 for (i = 0; i < snd_pcm_known_rates.count; i++)
539 if ((1u << i) == rate_bit)
540 return snd_pcm_known_rates.list[i];
541 return 0;
542}
543EXPORT_SYMBOL(snd_pcm_rate_bit_to_rate);
544
545static unsigned int snd_pcm_rate_mask_sanitize(unsigned int rates)
546{
547 if (rates & SNDRV_PCM_RATE_CONTINUOUS)
548 return SNDRV_PCM_RATE_CONTINUOUS;
549 else if (rates & SNDRV_PCM_RATE_KNOT)
550 return SNDRV_PCM_RATE_KNOT;
551 return rates;
552}
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566unsigned int snd_pcm_rate_mask_intersect(unsigned int rates_a,
567 unsigned int rates_b)
568{
569 rates_a = snd_pcm_rate_mask_sanitize(rates_a);
570 rates_b = snd_pcm_rate_mask_sanitize(rates_b);
571
572 if (rates_a & SNDRV_PCM_RATE_CONTINUOUS)
573 return rates_b;
574 else if (rates_b & SNDRV_PCM_RATE_CONTINUOUS)
575 return rates_a;
576 else if (rates_a & SNDRV_PCM_RATE_KNOT)
577 return rates_b;
578 else if (rates_b & SNDRV_PCM_RATE_KNOT)
579 return rates_a;
580 return rates_a & rates_b;
581}
582EXPORT_SYMBOL_GPL(snd_pcm_rate_mask_intersect);
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594
595unsigned int snd_pcm_rate_range_to_bits(unsigned int rate_min,
596 unsigned int rate_max)
597{
598 unsigned int rates = 0;
599 int i;
600
601 for (i = 0; i < snd_pcm_known_rates.count; i++) {
602 if (snd_pcm_known_rates.list[i] >= rate_min
603 && snd_pcm_known_rates.list[i] <= rate_max)
604 rates |= 1 << i;
605 }
606
607 if (!rates)
608 rates = SNDRV_PCM_RATE_KNOT;
609
610 return rates;
611}
612EXPORT_SYMBOL_GPL(snd_pcm_rate_range_to_bits);
613