1 | /* |
2 | * PCM Plug-In shared (kernel/library) code |
3 | * Copyright (c) 1999 by Jaroslav Kysela <perex@perex.cz> |
4 | * Copyright (c) 2000 by Abramo Bagnara <abramo@alsa-project.org> |
5 | * |
6 | * |
7 | * This library is free software; you can redistribute it and/or modify |
8 | * it under the terms of the GNU Library General Public License as |
9 | * published by the Free Software Foundation; either version 2 of |
10 | * the License, or (at your option) any later version. |
11 | * |
12 | * This program is distributed in the hope that it will be useful, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | * GNU Library General Public License for more details. |
16 | * |
17 | * You should have received a copy of the GNU Library General Public |
18 | * License along with this library; if not, write to the Free Software |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
20 | * |
21 | */ |
22 | |
23 | #if 0 |
24 | #define PLUGIN_DEBUG |
25 | #endif |
26 | |
27 | #include <linux/slab.h> |
28 | #include <linux/time.h> |
29 | #include <linux/vmalloc.h> |
30 | #include <sound/core.h> |
31 | #include <sound/pcm.h> |
32 | #include <sound/pcm_params.h> |
33 | #include "pcm_plugin.h" |
34 | |
35 | #define snd_pcm_plug_first(plug) ((plug)->runtime->oss.plugin_first) |
36 | #define snd_pcm_plug_last(plug) ((plug)->runtime->oss.plugin_last) |
37 | |
38 | /* |
39 | * because some cards might have rates "very close", we ignore |
40 | * all "resampling" requests within +-5% |
41 | */ |
42 | static int rate_match(unsigned int src_rate, unsigned int dst_rate) |
43 | { |
44 | unsigned int low = (src_rate * 95) / 100; |
45 | unsigned int high = (src_rate * 105) / 100; |
46 | return dst_rate >= low && dst_rate <= high; |
47 | } |
48 | |
49 | static int snd_pcm_plugin_alloc(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t frames) |
50 | { |
51 | struct snd_pcm_plugin_format *format; |
52 | ssize_t width; |
53 | size_t size; |
54 | unsigned int channel; |
55 | struct snd_pcm_plugin_channel *c; |
56 | |
57 | if (plugin->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
58 | format = &plugin->src_format; |
59 | } else { |
60 | format = &plugin->dst_format; |
61 | } |
62 | width = snd_pcm_format_physical_width(format: format->format); |
63 | if (width < 0) |
64 | return width; |
65 | size = array3_size(frames, format->channels, width); |
66 | /* check for too large period size once again */ |
67 | if (size > 1024 * 1024) |
68 | return -ENOMEM; |
69 | if (snd_BUG_ON(size % 8)) |
70 | return -ENXIO; |
71 | size /= 8; |
72 | if (plugin->buf_frames < frames) { |
73 | kvfree(addr: plugin->buf); |
74 | plugin->buf = kvzalloc(size, GFP_KERNEL); |
75 | plugin->buf_frames = frames; |
76 | } |
77 | if (!plugin->buf) { |
78 | plugin->buf_frames = 0; |
79 | return -ENOMEM; |
80 | } |
81 | c = plugin->buf_channels; |
82 | if (plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) { |
83 | for (channel = 0; channel < format->channels; channel++, c++) { |
84 | c->frames = frames; |
85 | c->enabled = 1; |
86 | c->wanted = 0; |
87 | c->area.addr = plugin->buf; |
88 | c->area.first = channel * width; |
89 | c->area.step = format->channels * width; |
90 | } |
91 | } else if (plugin->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) { |
92 | if (snd_BUG_ON(size % format->channels)) |
93 | return -EINVAL; |
94 | size /= format->channels; |
95 | for (channel = 0; channel < format->channels; channel++, c++) { |
96 | c->frames = frames; |
97 | c->enabled = 1; |
98 | c->wanted = 0; |
99 | c->area.addr = plugin->buf + (channel * size); |
100 | c->area.first = 0; |
101 | c->area.step = width; |
102 | } |
103 | } else |
104 | return -EINVAL; |
105 | return 0; |
106 | } |
107 | |
108 | int snd_pcm_plug_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t frames) |
109 | { |
110 | int err; |
111 | if (snd_BUG_ON(!snd_pcm_plug_first(plug))) |
112 | return -ENXIO; |
113 | if (snd_pcm_plug_stream(plug) == SNDRV_PCM_STREAM_PLAYBACK) { |
114 | struct snd_pcm_plugin *plugin = snd_pcm_plug_first(plug); |
115 | while (plugin->next) { |
116 | if (plugin->dst_frames) |
117 | frames = plugin->dst_frames(plugin, frames); |
118 | if ((snd_pcm_sframes_t)frames <= 0) |
119 | return -ENXIO; |
120 | plugin = plugin->next; |
121 | err = snd_pcm_plugin_alloc(plugin, frames); |
122 | if (err < 0) |
123 | return err; |
124 | } |
125 | } else { |
126 | struct snd_pcm_plugin *plugin = snd_pcm_plug_last(plug); |
127 | while (plugin->prev) { |
128 | if (plugin->src_frames) |
129 | frames = plugin->src_frames(plugin, frames); |
130 | if ((snd_pcm_sframes_t)frames <= 0) |
131 | return -ENXIO; |
132 | plugin = plugin->prev; |
133 | err = snd_pcm_plugin_alloc(plugin, frames); |
134 | if (err < 0) |
135 | return err; |
136 | } |
137 | } |
138 | return 0; |
139 | } |
140 | |
141 | |
142 | snd_pcm_sframes_t snd_pcm_plugin_client_channels(struct snd_pcm_plugin *plugin, |
143 | snd_pcm_uframes_t frames, |
144 | struct snd_pcm_plugin_channel **channels) |
145 | { |
146 | *channels = plugin->buf_channels; |
147 | return frames; |
148 | } |
149 | |
150 | int snd_pcm_plugin_build(struct snd_pcm_substream *plug, |
151 | const char *name, |
152 | struct snd_pcm_plugin_format *src_format, |
153 | struct snd_pcm_plugin_format *dst_format, |
154 | size_t , |
155 | struct snd_pcm_plugin **ret) |
156 | { |
157 | struct snd_pcm_plugin *plugin; |
158 | unsigned int channels; |
159 | |
160 | if (snd_BUG_ON(!plug)) |
161 | return -ENXIO; |
162 | if (snd_BUG_ON(!src_format || !dst_format)) |
163 | return -ENXIO; |
164 | plugin = kzalloc(size: sizeof(*plugin) + extra, GFP_KERNEL); |
165 | if (plugin == NULL) |
166 | return -ENOMEM; |
167 | plugin->name = name; |
168 | plugin->plug = plug; |
169 | plugin->stream = snd_pcm_plug_stream(plug); |
170 | plugin->access = SNDRV_PCM_ACCESS_RW_INTERLEAVED; |
171 | plugin->src_format = *src_format; |
172 | plugin->src_width = snd_pcm_format_physical_width(format: src_format->format); |
173 | snd_BUG_ON(plugin->src_width <= 0); |
174 | plugin->dst_format = *dst_format; |
175 | plugin->dst_width = snd_pcm_format_physical_width(format: dst_format->format); |
176 | snd_BUG_ON(plugin->dst_width <= 0); |
177 | if (plugin->stream == SNDRV_PCM_STREAM_PLAYBACK) |
178 | channels = src_format->channels; |
179 | else |
180 | channels = dst_format->channels; |
181 | plugin->buf_channels = kcalloc(n: channels, size: sizeof(*plugin->buf_channels), GFP_KERNEL); |
182 | if (plugin->buf_channels == NULL) { |
183 | snd_pcm_plugin_free(plugin); |
184 | return -ENOMEM; |
185 | } |
186 | plugin->client_channels = snd_pcm_plugin_client_channels; |
187 | *ret = plugin; |
188 | return 0; |
189 | } |
190 | |
191 | int snd_pcm_plugin_free(struct snd_pcm_plugin *plugin) |
192 | { |
193 | if (! plugin) |
194 | return 0; |
195 | if (plugin->private_free) |
196 | plugin->private_free(plugin); |
197 | kfree(objp: plugin->buf_channels); |
198 | kvfree(addr: plugin->buf); |
199 | kfree(objp: plugin); |
200 | return 0; |
201 | } |
202 | |
203 | static snd_pcm_sframes_t calc_dst_frames(struct snd_pcm_substream *plug, |
204 | snd_pcm_sframes_t frames, |
205 | bool check_size) |
206 | { |
207 | struct snd_pcm_plugin *plugin, *plugin_next; |
208 | |
209 | plugin = snd_pcm_plug_first(plug); |
210 | while (plugin && frames > 0) { |
211 | plugin_next = plugin->next; |
212 | if (check_size && plugin->buf_frames && |
213 | frames > plugin->buf_frames) |
214 | frames = plugin->buf_frames; |
215 | if (plugin->dst_frames) { |
216 | frames = plugin->dst_frames(plugin, frames); |
217 | if (frames < 0) |
218 | return frames; |
219 | } |
220 | plugin = plugin_next; |
221 | } |
222 | return frames; |
223 | } |
224 | |
225 | static snd_pcm_sframes_t calc_src_frames(struct snd_pcm_substream *plug, |
226 | snd_pcm_sframes_t frames, |
227 | bool check_size) |
228 | { |
229 | struct snd_pcm_plugin *plugin, *plugin_prev; |
230 | |
231 | plugin = snd_pcm_plug_last(plug); |
232 | while (plugin && frames > 0) { |
233 | plugin_prev = plugin->prev; |
234 | if (plugin->src_frames) { |
235 | frames = plugin->src_frames(plugin, frames); |
236 | if (frames < 0) |
237 | return frames; |
238 | } |
239 | if (check_size && plugin->buf_frames && |
240 | frames > plugin->buf_frames) |
241 | frames = plugin->buf_frames; |
242 | plugin = plugin_prev; |
243 | } |
244 | return frames; |
245 | } |
246 | |
247 | snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *plug, snd_pcm_uframes_t drv_frames) |
248 | { |
249 | if (snd_BUG_ON(!plug)) |
250 | return -ENXIO; |
251 | switch (snd_pcm_plug_stream(plug)) { |
252 | case SNDRV_PCM_STREAM_PLAYBACK: |
253 | return calc_src_frames(plug, frames: drv_frames, check_size: false); |
254 | case SNDRV_PCM_STREAM_CAPTURE: |
255 | return calc_dst_frames(plug, frames: drv_frames, check_size: false); |
256 | default: |
257 | snd_BUG(); |
258 | return -EINVAL; |
259 | } |
260 | } |
261 | |
262 | snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *plug, snd_pcm_uframes_t clt_frames) |
263 | { |
264 | if (snd_BUG_ON(!plug)) |
265 | return -ENXIO; |
266 | switch (snd_pcm_plug_stream(plug)) { |
267 | case SNDRV_PCM_STREAM_PLAYBACK: |
268 | return calc_dst_frames(plug, frames: clt_frames, check_size: false); |
269 | case SNDRV_PCM_STREAM_CAPTURE: |
270 | return calc_src_frames(plug, frames: clt_frames, check_size: false); |
271 | default: |
272 | snd_BUG(); |
273 | return -EINVAL; |
274 | } |
275 | } |
276 | |
277 | static int snd_pcm_plug_formats(const struct snd_mask *mask, |
278 | snd_pcm_format_t format) |
279 | { |
280 | struct snd_mask formats = *mask; |
281 | u64 linfmts = (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S8 | |
282 | SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_S16_LE | |
283 | SNDRV_PCM_FMTBIT_U16_BE | SNDRV_PCM_FMTBIT_S16_BE | |
284 | SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_S24_LE | |
285 | SNDRV_PCM_FMTBIT_U24_BE | SNDRV_PCM_FMTBIT_S24_BE | |
286 | SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_S24_3LE | |
287 | SNDRV_PCM_FMTBIT_U24_3BE | SNDRV_PCM_FMTBIT_S24_3BE | |
288 | SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_S32_LE | |
289 | SNDRV_PCM_FMTBIT_U32_BE | SNDRV_PCM_FMTBIT_S32_BE); |
290 | snd_mask_set(mask: &formats, val: (__force int)SNDRV_PCM_FORMAT_MU_LAW); |
291 | |
292 | if (formats.bits[0] & lower_32_bits(linfmts)) |
293 | formats.bits[0] |= lower_32_bits(linfmts); |
294 | if (formats.bits[1] & upper_32_bits(linfmts)) |
295 | formats.bits[1] |= upper_32_bits(linfmts); |
296 | return snd_mask_test(mask: &formats, val: (__force int)format); |
297 | } |
298 | |
299 | static const snd_pcm_format_t preferred_formats[] = { |
300 | SNDRV_PCM_FORMAT_S16_LE, |
301 | SNDRV_PCM_FORMAT_S16_BE, |
302 | SNDRV_PCM_FORMAT_U16_LE, |
303 | SNDRV_PCM_FORMAT_U16_BE, |
304 | SNDRV_PCM_FORMAT_S24_3LE, |
305 | SNDRV_PCM_FORMAT_S24_3BE, |
306 | SNDRV_PCM_FORMAT_U24_3LE, |
307 | SNDRV_PCM_FORMAT_U24_3BE, |
308 | SNDRV_PCM_FORMAT_S24_LE, |
309 | SNDRV_PCM_FORMAT_S24_BE, |
310 | SNDRV_PCM_FORMAT_U24_LE, |
311 | SNDRV_PCM_FORMAT_U24_BE, |
312 | SNDRV_PCM_FORMAT_S32_LE, |
313 | SNDRV_PCM_FORMAT_S32_BE, |
314 | SNDRV_PCM_FORMAT_U32_LE, |
315 | SNDRV_PCM_FORMAT_U32_BE, |
316 | SNDRV_PCM_FORMAT_S8, |
317 | SNDRV_PCM_FORMAT_U8 |
318 | }; |
319 | |
320 | snd_pcm_format_t snd_pcm_plug_slave_format(snd_pcm_format_t format, |
321 | const struct snd_mask *format_mask) |
322 | { |
323 | int i; |
324 | |
325 | if (snd_mask_test(mask: format_mask, val: (__force int)format)) |
326 | return format; |
327 | if (!snd_pcm_plug_formats(mask: format_mask, format)) |
328 | return (__force snd_pcm_format_t)-EINVAL; |
329 | if (snd_pcm_format_linear(format)) { |
330 | unsigned int width = snd_pcm_format_width(format); |
331 | int unsignd = snd_pcm_format_unsigned(format) > 0; |
332 | int big = snd_pcm_format_big_endian(format) > 0; |
333 | unsigned int badness, best = -1; |
334 | snd_pcm_format_t best_format = (__force snd_pcm_format_t)-1; |
335 | for (i = 0; i < ARRAY_SIZE(preferred_formats); i++) { |
336 | snd_pcm_format_t f = preferred_formats[i]; |
337 | unsigned int w; |
338 | if (!snd_mask_test(mask: format_mask, val: (__force int)f)) |
339 | continue; |
340 | w = snd_pcm_format_width(format: f); |
341 | if (w >= width) |
342 | badness = w - width; |
343 | else |
344 | badness = width - w + 32; |
345 | badness += snd_pcm_format_unsigned(format: f) != unsignd; |
346 | badness += snd_pcm_format_big_endian(format: f) != big; |
347 | if (badness < best) { |
348 | best_format = f; |
349 | best = badness; |
350 | } |
351 | } |
352 | if ((__force int)best_format >= 0) |
353 | return best_format; |
354 | else |
355 | return (__force snd_pcm_format_t)-EINVAL; |
356 | } else { |
357 | switch (format) { |
358 | case SNDRV_PCM_FORMAT_MU_LAW: |
359 | for (i = 0; i < ARRAY_SIZE(preferred_formats); ++i) { |
360 | snd_pcm_format_t format1 = preferred_formats[i]; |
361 | if (snd_mask_test(mask: format_mask, val: (__force int)format1)) |
362 | return format1; |
363 | } |
364 | fallthrough; |
365 | default: |
366 | return (__force snd_pcm_format_t)-EINVAL; |
367 | } |
368 | } |
369 | } |
370 | |
371 | int snd_pcm_plug_format_plugins(struct snd_pcm_substream *plug, |
372 | struct snd_pcm_hw_params *params, |
373 | struct snd_pcm_hw_params *slave_params) |
374 | { |
375 | struct snd_pcm_plugin_format tmpformat; |
376 | struct snd_pcm_plugin_format dstformat; |
377 | struct snd_pcm_plugin_format srcformat; |
378 | snd_pcm_access_t src_access, dst_access; |
379 | struct snd_pcm_plugin *plugin = NULL; |
380 | int err; |
381 | int stream = snd_pcm_plug_stream(plug); |
382 | int slave_interleaved = (params_channels(p: slave_params) == 1 || |
383 | params_access(p: slave_params) == SNDRV_PCM_ACCESS_RW_INTERLEAVED); |
384 | |
385 | switch (stream) { |
386 | case SNDRV_PCM_STREAM_PLAYBACK: |
387 | dstformat.format = params_format(p: slave_params); |
388 | dstformat.rate = params_rate(p: slave_params); |
389 | dstformat.channels = params_channels(p: slave_params); |
390 | srcformat.format = params_format(p: params); |
391 | srcformat.rate = params_rate(p: params); |
392 | srcformat.channels = params_channels(p: params); |
393 | src_access = SNDRV_PCM_ACCESS_RW_INTERLEAVED; |
394 | dst_access = (slave_interleaved ? SNDRV_PCM_ACCESS_RW_INTERLEAVED : |
395 | SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); |
396 | break; |
397 | case SNDRV_PCM_STREAM_CAPTURE: |
398 | dstformat.format = params_format(p: params); |
399 | dstformat.rate = params_rate(p: params); |
400 | dstformat.channels = params_channels(p: params); |
401 | srcformat.format = params_format(p: slave_params); |
402 | srcformat.rate = params_rate(p: slave_params); |
403 | srcformat.channels = params_channels(p: slave_params); |
404 | src_access = (slave_interleaved ? SNDRV_PCM_ACCESS_RW_INTERLEAVED : |
405 | SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); |
406 | dst_access = SNDRV_PCM_ACCESS_RW_INTERLEAVED; |
407 | break; |
408 | default: |
409 | snd_BUG(); |
410 | return -EINVAL; |
411 | } |
412 | tmpformat = srcformat; |
413 | |
414 | pdprintf("srcformat: format=%i, rate=%i, channels=%i\n" , |
415 | srcformat.format, |
416 | srcformat.rate, |
417 | srcformat.channels); |
418 | pdprintf("dstformat: format=%i, rate=%i, channels=%i\n" , |
419 | dstformat.format, |
420 | dstformat.rate, |
421 | dstformat.channels); |
422 | |
423 | /* Format change (linearization) */ |
424 | if (! rate_match(src_rate: srcformat.rate, dst_rate: dstformat.rate) && |
425 | ! snd_pcm_format_linear(format: srcformat.format)) { |
426 | if (srcformat.format != SNDRV_PCM_FORMAT_MU_LAW) |
427 | return -EINVAL; |
428 | tmpformat.format = SNDRV_PCM_FORMAT_S16; |
429 | err = snd_pcm_plugin_build_mulaw(handle: plug, |
430 | src_format: &srcformat, dst_format: &tmpformat, |
431 | r_plugin: &plugin); |
432 | if (err < 0) |
433 | return err; |
434 | err = snd_pcm_plugin_append(plugin); |
435 | if (err < 0) { |
436 | snd_pcm_plugin_free(plugin); |
437 | return err; |
438 | } |
439 | srcformat = tmpformat; |
440 | src_access = dst_access; |
441 | } |
442 | |
443 | /* channels reduction */ |
444 | if (srcformat.channels > dstformat.channels) { |
445 | tmpformat.channels = dstformat.channels; |
446 | err = snd_pcm_plugin_build_route(handle: plug, src_format: &srcformat, dst_format: &tmpformat, r_plugin: &plugin); |
447 | pdprintf("channels reduction: src=%i, dst=%i returns %i\n" , srcformat.channels, tmpformat.channels, err); |
448 | if (err < 0) |
449 | return err; |
450 | err = snd_pcm_plugin_append(plugin); |
451 | if (err < 0) { |
452 | snd_pcm_plugin_free(plugin); |
453 | return err; |
454 | } |
455 | srcformat = tmpformat; |
456 | src_access = dst_access; |
457 | } |
458 | |
459 | /* rate resampling */ |
460 | if (!rate_match(src_rate: srcformat.rate, dst_rate: dstformat.rate)) { |
461 | if (srcformat.format != SNDRV_PCM_FORMAT_S16) { |
462 | /* convert to S16 for resampling */ |
463 | tmpformat.format = SNDRV_PCM_FORMAT_S16; |
464 | err = snd_pcm_plugin_build_linear(handle: plug, |
465 | src_format: &srcformat, dst_format: &tmpformat, |
466 | r_plugin: &plugin); |
467 | if (err < 0) |
468 | return err; |
469 | err = snd_pcm_plugin_append(plugin); |
470 | if (err < 0) { |
471 | snd_pcm_plugin_free(plugin); |
472 | return err; |
473 | } |
474 | srcformat = tmpformat; |
475 | src_access = dst_access; |
476 | } |
477 | tmpformat.rate = dstformat.rate; |
478 | err = snd_pcm_plugin_build_rate(handle: plug, |
479 | src_format: &srcformat, dst_format: &tmpformat, |
480 | r_plugin: &plugin); |
481 | pdprintf("rate down resampling: src=%i, dst=%i returns %i\n" , srcformat.rate, tmpformat.rate, err); |
482 | if (err < 0) |
483 | return err; |
484 | err = snd_pcm_plugin_append(plugin); |
485 | if (err < 0) { |
486 | snd_pcm_plugin_free(plugin); |
487 | return err; |
488 | } |
489 | srcformat = tmpformat; |
490 | src_access = dst_access; |
491 | } |
492 | |
493 | /* format change */ |
494 | if (srcformat.format != dstformat.format) { |
495 | tmpformat.format = dstformat.format; |
496 | if (srcformat.format == SNDRV_PCM_FORMAT_MU_LAW || |
497 | tmpformat.format == SNDRV_PCM_FORMAT_MU_LAW) { |
498 | err = snd_pcm_plugin_build_mulaw(handle: plug, |
499 | src_format: &srcformat, dst_format: &tmpformat, |
500 | r_plugin: &plugin); |
501 | } |
502 | else if (snd_pcm_format_linear(format: srcformat.format) && |
503 | snd_pcm_format_linear(format: tmpformat.format)) { |
504 | err = snd_pcm_plugin_build_linear(handle: plug, |
505 | src_format: &srcformat, dst_format: &tmpformat, |
506 | r_plugin: &plugin); |
507 | } |
508 | else |
509 | return -EINVAL; |
510 | pdprintf("format change: src=%i, dst=%i returns %i\n" , srcformat.format, tmpformat.format, err); |
511 | if (err < 0) |
512 | return err; |
513 | err = snd_pcm_plugin_append(plugin); |
514 | if (err < 0) { |
515 | snd_pcm_plugin_free(plugin); |
516 | return err; |
517 | } |
518 | srcformat = tmpformat; |
519 | src_access = dst_access; |
520 | } |
521 | |
522 | /* channels extension */ |
523 | if (srcformat.channels < dstformat.channels) { |
524 | tmpformat.channels = dstformat.channels; |
525 | err = snd_pcm_plugin_build_route(handle: plug, src_format: &srcformat, dst_format: &tmpformat, r_plugin: &plugin); |
526 | pdprintf("channels extension: src=%i, dst=%i returns %i\n" , srcformat.channels, tmpformat.channels, err); |
527 | if (err < 0) |
528 | return err; |
529 | err = snd_pcm_plugin_append(plugin); |
530 | if (err < 0) { |
531 | snd_pcm_plugin_free(plugin); |
532 | return err; |
533 | } |
534 | srcformat = tmpformat; |
535 | src_access = dst_access; |
536 | } |
537 | |
538 | /* de-interleave */ |
539 | if (src_access != dst_access) { |
540 | err = snd_pcm_plugin_build_copy(handle: plug, |
541 | src_format: &srcformat, |
542 | dst_format: &tmpformat, |
543 | r_plugin: &plugin); |
544 | pdprintf("interleave change (copy: returns %i)\n" , err); |
545 | if (err < 0) |
546 | return err; |
547 | err = snd_pcm_plugin_append(plugin); |
548 | if (err < 0) { |
549 | snd_pcm_plugin_free(plugin); |
550 | return err; |
551 | } |
552 | } |
553 | |
554 | return 0; |
555 | } |
556 | |
557 | snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(struct snd_pcm_substream *plug, |
558 | char *buf, |
559 | snd_pcm_uframes_t count, |
560 | struct snd_pcm_plugin_channel **channels) |
561 | { |
562 | struct snd_pcm_plugin *plugin; |
563 | struct snd_pcm_plugin_channel *v; |
564 | struct snd_pcm_plugin_format *format; |
565 | int width, nchannels, channel; |
566 | int stream = snd_pcm_plug_stream(plug); |
567 | |
568 | if (snd_BUG_ON(!buf)) |
569 | return -ENXIO; |
570 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
571 | plugin = snd_pcm_plug_first(plug); |
572 | format = &plugin->src_format; |
573 | } else { |
574 | plugin = snd_pcm_plug_last(plug); |
575 | format = &plugin->dst_format; |
576 | } |
577 | v = plugin->buf_channels; |
578 | *channels = v; |
579 | width = snd_pcm_format_physical_width(format: format->format); |
580 | if (width < 0) |
581 | return width; |
582 | nchannels = format->channels; |
583 | if (snd_BUG_ON(plugin->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && |
584 | format->channels > 1)) |
585 | return -ENXIO; |
586 | for (channel = 0; channel < nchannels; channel++, v++) { |
587 | v->frames = count; |
588 | v->enabled = 1; |
589 | v->wanted = (stream == SNDRV_PCM_STREAM_CAPTURE); |
590 | v->area.addr = buf; |
591 | v->area.first = channel * width; |
592 | v->area.step = nchannels * width; |
593 | } |
594 | return count; |
595 | } |
596 | |
597 | snd_pcm_sframes_t snd_pcm_plug_write_transfer(struct snd_pcm_substream *plug, struct snd_pcm_plugin_channel *src_channels, snd_pcm_uframes_t size) |
598 | { |
599 | struct snd_pcm_plugin *plugin, *next; |
600 | struct snd_pcm_plugin_channel *dst_channels; |
601 | int err; |
602 | snd_pcm_sframes_t frames = size; |
603 | |
604 | plugin = snd_pcm_plug_first(plug); |
605 | while (plugin) { |
606 | if (frames <= 0) |
607 | return frames; |
608 | next = plugin->next; |
609 | if (next) { |
610 | snd_pcm_sframes_t frames1 = frames; |
611 | if (plugin->dst_frames) { |
612 | frames1 = plugin->dst_frames(plugin, frames); |
613 | if (frames1 <= 0) |
614 | return frames1; |
615 | } |
616 | err = next->client_channels(next, frames1, &dst_channels); |
617 | if (err < 0) |
618 | return err; |
619 | if (err != frames1) { |
620 | frames = err; |
621 | if (plugin->src_frames) { |
622 | frames = plugin->src_frames(plugin, frames1); |
623 | if (frames <= 0) |
624 | return frames; |
625 | } |
626 | } |
627 | } else |
628 | dst_channels = NULL; |
629 | pdprintf("write plugin: %s, %li\n" , plugin->name, frames); |
630 | frames = plugin->transfer(plugin, src_channels, dst_channels, frames); |
631 | if (frames < 0) |
632 | return frames; |
633 | src_channels = dst_channels; |
634 | plugin = next; |
635 | } |
636 | return calc_src_frames(plug, frames, check_size: true); |
637 | } |
638 | |
639 | snd_pcm_sframes_t snd_pcm_plug_read_transfer(struct snd_pcm_substream *plug, struct snd_pcm_plugin_channel *dst_channels_final, snd_pcm_uframes_t size) |
640 | { |
641 | struct snd_pcm_plugin *plugin, *next; |
642 | struct snd_pcm_plugin_channel *src_channels, *dst_channels; |
643 | snd_pcm_sframes_t frames = size; |
644 | int err; |
645 | |
646 | frames = calc_src_frames(plug, frames, check_size: true); |
647 | if (frames < 0) |
648 | return frames; |
649 | |
650 | src_channels = NULL; |
651 | plugin = snd_pcm_plug_first(plug); |
652 | while (plugin && frames > 0) { |
653 | next = plugin->next; |
654 | if (next) { |
655 | err = plugin->client_channels(plugin, frames, &dst_channels); |
656 | if (err < 0) |
657 | return err; |
658 | frames = err; |
659 | } else { |
660 | dst_channels = dst_channels_final; |
661 | } |
662 | pdprintf("read plugin: %s, %li\n" , plugin->name, frames); |
663 | frames = plugin->transfer(plugin, src_channels, dst_channels, frames); |
664 | if (frames < 0) |
665 | return frames; |
666 | plugin = next; |
667 | src_channels = dst_channels; |
668 | } |
669 | return frames; |
670 | } |
671 | |
672 | int snd_pcm_area_silence(const struct snd_pcm_channel_area *dst_area, size_t dst_offset, |
673 | size_t samples, snd_pcm_format_t format) |
674 | { |
675 | /* FIXME: sub byte resolution and odd dst_offset */ |
676 | unsigned char *dst; |
677 | unsigned int dst_step; |
678 | int width; |
679 | const unsigned char *silence; |
680 | if (!dst_area->addr) |
681 | return 0; |
682 | dst = dst_area->addr + (dst_area->first + dst_area->step * dst_offset) / 8; |
683 | width = snd_pcm_format_physical_width(format); |
684 | if (width <= 0) |
685 | return -EINVAL; |
686 | if (dst_area->step == (unsigned int) width && width >= 8) |
687 | return snd_pcm_format_set_silence(format, buf: dst, frames: samples); |
688 | silence = snd_pcm_format_silence_64(format); |
689 | if (! silence) |
690 | return -EINVAL; |
691 | dst_step = dst_area->step / 8; |
692 | if (width == 4) { |
693 | /* Ima ADPCM */ |
694 | int dstbit = dst_area->first % 8; |
695 | int dstbit_step = dst_area->step % 8; |
696 | while (samples-- > 0) { |
697 | if (dstbit) |
698 | *dst &= 0xf0; |
699 | else |
700 | *dst &= 0x0f; |
701 | dst += dst_step; |
702 | dstbit += dstbit_step; |
703 | if (dstbit == 8) { |
704 | dst++; |
705 | dstbit = 0; |
706 | } |
707 | } |
708 | } else { |
709 | width /= 8; |
710 | while (samples-- > 0) { |
711 | memcpy(dst, silence, width); |
712 | dst += dst_step; |
713 | } |
714 | } |
715 | return 0; |
716 | } |
717 | |
718 | int snd_pcm_area_copy(const struct snd_pcm_channel_area *src_area, size_t src_offset, |
719 | const struct snd_pcm_channel_area *dst_area, size_t dst_offset, |
720 | size_t samples, snd_pcm_format_t format) |
721 | { |
722 | /* FIXME: sub byte resolution and odd dst_offset */ |
723 | char *src, *dst; |
724 | int width; |
725 | int src_step, dst_step; |
726 | src = src_area->addr + (src_area->first + src_area->step * src_offset) / 8; |
727 | if (!src_area->addr) |
728 | return snd_pcm_area_silence(dst_area, dst_offset, samples, format); |
729 | dst = dst_area->addr + (dst_area->first + dst_area->step * dst_offset) / 8; |
730 | if (!dst_area->addr) |
731 | return 0; |
732 | width = snd_pcm_format_physical_width(format); |
733 | if (width <= 0) |
734 | return -EINVAL; |
735 | if (src_area->step == (unsigned int) width && |
736 | dst_area->step == (unsigned int) width && width >= 8) { |
737 | size_t bytes = samples * width / 8; |
738 | memcpy(dst, src, bytes); |
739 | return 0; |
740 | } |
741 | src_step = src_area->step / 8; |
742 | dst_step = dst_area->step / 8; |
743 | if (width == 4) { |
744 | /* Ima ADPCM */ |
745 | int srcbit = src_area->first % 8; |
746 | int srcbit_step = src_area->step % 8; |
747 | int dstbit = dst_area->first % 8; |
748 | int dstbit_step = dst_area->step % 8; |
749 | while (samples-- > 0) { |
750 | unsigned char srcval; |
751 | if (srcbit) |
752 | srcval = *src & 0x0f; |
753 | else |
754 | srcval = (*src & 0xf0) >> 4; |
755 | if (dstbit) |
756 | *dst = (*dst & 0xf0) | srcval; |
757 | else |
758 | *dst = (*dst & 0x0f) | (srcval << 4); |
759 | src += src_step; |
760 | srcbit += srcbit_step; |
761 | if (srcbit == 8) { |
762 | src++; |
763 | srcbit = 0; |
764 | } |
765 | dst += dst_step; |
766 | dstbit += dstbit_step; |
767 | if (dstbit == 8) { |
768 | dst++; |
769 | dstbit = 0; |
770 | } |
771 | } |
772 | } else { |
773 | width /= 8; |
774 | while (samples-- > 0) { |
775 | memcpy(dst, src, width); |
776 | src += src_step; |
777 | dst += dst_step; |
778 | } |
779 | } |
780 | return 0; |
781 | } |
782 | |