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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * PCM Plug-In shared (kernel/library) code | |
c1017a4c | 3 | * Copyright (c) 1999 by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
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 | ||
1da177e4 LT |
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 | ||
1da177e4 LT |
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 | ||
6ac77bc1 | 49 | static int snd_pcm_plugin_alloc(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t frames) |
1da177e4 | 50 | { |
6ac77bc1 | 51 | struct snd_pcm_plugin_format *format; |
1da177e4 LT |
52 | ssize_t width; |
53 | size_t size; | |
54 | unsigned int channel; | |
6ac77bc1 | 55 | struct snd_pcm_plugin_channel *c; |
1da177e4 LT |
56 | |
57 | if (plugin->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
58 | format = &plugin->src_format; | |
59 | } else { | |
60 | format = &plugin->dst_format; | |
61 | } | |
51c816fd TI |
62 | width = snd_pcm_format_physical_width(format->format); |
63 | if (width < 0) | |
1da177e4 | 64 | return width; |
20b79f88 TI |
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; | |
7eaa943c TI |
69 | if (snd_BUG_ON(size % 8)) |
70 | return -ENXIO; | |
1da177e4 LT |
71 | size /= 8; |
72 | if (plugin->buf_frames < frames) { | |
65766ee0 TI |
73 | kvfree(plugin->buf); |
74 | plugin->buf = kvzalloc(size, GFP_KERNEL); | |
1da177e4 LT |
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) { | |
7eaa943c TI |
92 | if (snd_BUG_ON(size % format->channels)) |
93 | return -EINVAL; | |
1da177e4 LT |
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 | ||
6ac77bc1 | 108 | int snd_pcm_plug_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t frames) |
1da177e4 LT |
109 | { |
110 | int err; | |
7eaa943c TI |
111 | if (snd_BUG_ON(!snd_pcm_plug_first(plug))) |
112 | return -ENXIO; | |
1da177e4 | 113 | if (snd_pcm_plug_stream(plug) == SNDRV_PCM_STREAM_PLAYBACK) { |
6ac77bc1 | 114 | struct snd_pcm_plugin *plugin = snd_pcm_plug_first(plug); |
1da177e4 LT |
115 | while (plugin->next) { |
116 | if (plugin->dst_frames) | |
117 | frames = plugin->dst_frames(plugin, frames); | |
5461e053 | 118 | if ((snd_pcm_sframes_t)frames <= 0) |
7eaa943c | 119 | return -ENXIO; |
1da177e4 LT |
120 | plugin = plugin->next; |
121 | err = snd_pcm_plugin_alloc(plugin, frames); | |
122 | if (err < 0) | |
123 | return err; | |
124 | } | |
125 | } else { | |
6ac77bc1 | 126 | struct snd_pcm_plugin *plugin = snd_pcm_plug_last(plug); |
1da177e4 LT |
127 | while (plugin->prev) { |
128 | if (plugin->src_frames) | |
129 | frames = plugin->src_frames(plugin, frames); | |
5461e053 | 130 | if ((snd_pcm_sframes_t)frames <= 0) |
7eaa943c | 131 | return -ENXIO; |
1da177e4 LT |
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 | ||
6ac77bc1 | 142 | snd_pcm_sframes_t snd_pcm_plugin_client_channels(struct snd_pcm_plugin *plugin, |
1da177e4 | 143 | snd_pcm_uframes_t frames, |
6ac77bc1 | 144 | struct snd_pcm_plugin_channel **channels) |
1da177e4 LT |
145 | { |
146 | *channels = plugin->buf_channels; | |
147 | return frames; | |
148 | } | |
149 | ||
6ac77bc1 | 150 | int snd_pcm_plugin_build(struct snd_pcm_substream *plug, |
1da177e4 | 151 | const char *name, |
6ac77bc1 TI |
152 | struct snd_pcm_plugin_format *src_format, |
153 | struct snd_pcm_plugin_format *dst_format, | |
1da177e4 | 154 | size_t extra, |
6ac77bc1 | 155 | struct snd_pcm_plugin **ret) |
1da177e4 | 156 | { |
6ac77bc1 | 157 | struct snd_pcm_plugin *plugin; |
1da177e4 LT |
158 | unsigned int channels; |
159 | ||
7eaa943c TI |
160 | if (snd_BUG_ON(!plug)) |
161 | return -ENXIO; | |
162 | if (snd_BUG_ON(!src_format || !dst_format)) | |
163 | return -ENXIO; | |
ca2c0966 | 164 | plugin = kzalloc(sizeof(*plugin) + extra, GFP_KERNEL); |
1da177e4 LT |
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(src_format->format); | |
7eaa943c | 173 | snd_BUG_ON(plugin->src_width <= 0); |
1da177e4 LT |
174 | plugin->dst_format = *dst_format; |
175 | plugin->dst_width = snd_pcm_format_physical_width(dst_format->format); | |
7eaa943c | 176 | snd_BUG_ON(plugin->dst_width <= 0); |
1da177e4 LT |
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(channels, sizeof(*plugin->buf_channels), GFP_KERNEL); | |
182 | if (plugin->buf_channels == NULL) { | |
183 | snd_pcm_plugin_free(plugin); | |
184 | return -ENOMEM; | |
185 | } | |
1da177e4 | 186 | plugin->client_channels = snd_pcm_plugin_client_channels; |
1da177e4 LT |
187 | *ret = plugin; |
188 | return 0; | |
189 | } | |
190 | ||
6ac77bc1 | 191 | int snd_pcm_plugin_free(struct snd_pcm_plugin *plugin) |
1da177e4 LT |
192 | { |
193 | if (! plugin) | |
194 | return 0; | |
195 | if (plugin->private_free) | |
196 | plugin->private_free(plugin); | |
197 | kfree(plugin->buf_channels); | |
65766ee0 | 198 | kvfree(plugin->buf); |
1da177e4 LT |
199 | kfree(plugin); |
200 | return 0; | |
201 | } | |
202 | ||
3bbf9e2f | 203 | static snd_pcm_sframes_t calc_dst_frames(struct snd_pcm_substream *plug, |
ff7e06a5 TI |
204 | snd_pcm_sframes_t frames, |
205 | bool check_size) | |
1da177e4 | 206 | { |
3bbf9e2f | 207 | struct snd_pcm_plugin *plugin, *plugin_next; |
1da177e4 | 208 | |
3bbf9e2f TI |
209 | plugin = snd_pcm_plug_first(plug); |
210 | while (plugin && frames > 0) { | |
211 | plugin_next = plugin->next; | |
ac957e8c TI |
212 | if (check_size && plugin->buf_frames && |
213 | frames > plugin->buf_frames) | |
214 | frames = plugin->buf_frames; | |
3bbf9e2f TI |
215 | if (plugin->dst_frames) { |
216 | frames = plugin->dst_frames(plugin, frames); | |
217 | if (frames < 0) | |
218 | return frames; | |
1da177e4 | 219 | } |
3bbf9e2f TI |
220 | plugin = plugin_next; |
221 | } | |
222 | return frames; | |
223 | } | |
224 | ||
225 | static snd_pcm_sframes_t calc_src_frames(struct snd_pcm_substream *plug, | |
ff7e06a5 TI |
226 | snd_pcm_sframes_t frames, |
227 | bool check_size) | |
3bbf9e2f TI |
228 | { |
229 | struct snd_pcm_plugin *plugin, *plugin_prev; | |
230 | ||
231 | plugin = snd_pcm_plug_last(plug); | |
232 | while (plugin && frames > 0) { | |
3bbf9e2f TI |
233 | plugin_prev = plugin->prev; |
234 | if (plugin->src_frames) { | |
235 | frames = plugin->src_frames(plugin, frames); | |
236 | if (frames < 0) | |
237 | return frames; | |
1da177e4 | 238 | } |
ac957e8c TI |
239 | if (check_size && plugin->buf_frames && |
240 | frames > plugin->buf_frames) | |
241 | frames = plugin->buf_frames; | |
3bbf9e2f TI |
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: | |
ff7e06a5 | 253 | return calc_src_frames(plug, drv_frames, false); |
3bbf9e2f | 254 | case SNDRV_PCM_STREAM_CAPTURE: |
ff7e06a5 | 255 | return calc_dst_frames(plug, drv_frames, false); |
3bbf9e2f | 256 | default: |
1da177e4 | 257 | snd_BUG(); |
3bbf9e2f TI |
258 | return -EINVAL; |
259 | } | |
1da177e4 LT |
260 | } |
261 | ||
6ac77bc1 | 262 | snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *plug, snd_pcm_uframes_t clt_frames) |
1da177e4 | 263 | { |
7eaa943c TI |
264 | if (snd_BUG_ON(!plug)) |
265 | return -ENXIO; | |
3bbf9e2f TI |
266 | switch (snd_pcm_plug_stream(plug)) { |
267 | case SNDRV_PCM_STREAM_PLAYBACK: | |
ff7e06a5 | 268 | return calc_dst_frames(plug, clt_frames, false); |
3bbf9e2f | 269 | case SNDRV_PCM_STREAM_CAPTURE: |
ff7e06a5 | 270 | return calc_src_frames(plug, clt_frames, false); |
3bbf9e2f | 271 | default: |
1da177e4 | 272 | snd_BUG(); |
3bbf9e2f TI |
273 | return -EINVAL; |
274 | } | |
1da177e4 LT |
275 | } |
276 | ||
e76bf3c4 TS |
277 | static int snd_pcm_plug_formats(const struct snd_mask *mask, |
278 | snd_pcm_format_t format) | |
1da177e4 | 279 | { |
6ac77bc1 | 280 | struct snd_mask formats = *mask; |
1da177e4 LT |
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 | | |
64d27f96 TI |
286 | SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_S24_3LE | |
287 | SNDRV_PCM_FMTBIT_U24_3BE | SNDRV_PCM_FMTBIT_S24_3BE | | |
1da177e4 LT |
288 | SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_S32_LE | |
289 | SNDRV_PCM_FMTBIT_U32_BE | SNDRV_PCM_FMTBIT_S32_BE); | |
fea952e5 | 290 | snd_mask_set(&formats, (__force int)SNDRV_PCM_FORMAT_MU_LAW); |
1da177e4 | 291 | |
191bb51e TI |
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); | |
fea952e5 | 296 | return snd_mask_test(&formats, (__force int)format); |
1da177e4 LT |
297 | } |
298 | ||
b40fe4bb | 299 | static const snd_pcm_format_t preferred_formats[] = { |
1da177e4 LT |
300 | SNDRV_PCM_FORMAT_S16_LE, |
301 | SNDRV_PCM_FORMAT_S16_BE, | |
302 | SNDRV_PCM_FORMAT_U16_LE, | |
303 | SNDRV_PCM_FORMAT_U16_BE, | |
64d27f96 TI |
304 | SNDRV_PCM_FORMAT_S24_3LE, |
305 | SNDRV_PCM_FORMAT_S24_3BE, | |
306 | SNDRV_PCM_FORMAT_U24_3LE, | |
307 | SNDRV_PCM_FORMAT_U24_3BE, | |
1da177e4 LT |
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 | ||
fea952e5 | 320 | snd_pcm_format_t snd_pcm_plug_slave_format(snd_pcm_format_t format, |
e76bf3c4 | 321 | const struct snd_mask *format_mask) |
1da177e4 | 322 | { |
64d27f96 TI |
323 | int i; |
324 | ||
fea952e5 | 325 | if (snd_mask_test(format_mask, (__force int)format)) |
1da177e4 | 326 | return format; |
fea952e5 CL |
327 | if (!snd_pcm_plug_formats(format_mask, format)) |
328 | return (__force snd_pcm_format_t)-EINVAL; | |
1da177e4 | 329 | if (snd_pcm_format_linear(format)) { |
64d27f96 TI |
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; | |
fea952e5 | 334 | snd_pcm_format_t best_format = (__force snd_pcm_format_t)-1; |
64d27f96 | 335 | for (i = 0; i < ARRAY_SIZE(preferred_formats); i++) { |
fea952e5 | 336 | snd_pcm_format_t f = preferred_formats[i]; |
64d27f96 | 337 | unsigned int w; |
fea952e5 | 338 | if (!snd_mask_test(format_mask, (__force int)f)) |
64d27f96 TI |
339 | continue; |
340 | w = snd_pcm_format_width(f); | |
341 | if (w >= width) | |
342 | badness = w - width; | |
343 | else | |
344 | badness = width - w + 32; | |
345 | badness += snd_pcm_format_unsigned(f) != unsignd; | |
346 | badness += snd_pcm_format_big_endian(f) != big; | |
347 | if (badness < best) { | |
348 | best_format = f; | |
349 | best = badness; | |
1da177e4 | 350 | } |
1da177e4 | 351 | } |
fea952e5 CL |
352 | if ((__force int)best_format >= 0) |
353 | return best_format; | |
354 | else | |
355 | return (__force snd_pcm_format_t)-EINVAL; | |
1da177e4 | 356 | } else { |
1da177e4 LT |
357 | switch (format) { |
358 | case SNDRV_PCM_FORMAT_MU_LAW: | |
359 | for (i = 0; i < ARRAY_SIZE(preferred_formats); ++i) { | |
fea952e5 CL |
360 | snd_pcm_format_t format1 = preferred_formats[i]; |
361 | if (snd_mask_test(format_mask, (__force int)format1)) | |
1da177e4 LT |
362 | return format1; |
363 | } | |
c0dbbdad | 364 | fallthrough; |
1da177e4 | 365 | default: |
fea952e5 | 366 | return (__force snd_pcm_format_t)-EINVAL; |
1da177e4 LT |
367 | } |
368 | } | |
369 | } | |
370 | ||
6ac77bc1 TI |
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) | |
1da177e4 | 374 | { |
6ac77bc1 TI |
375 | struct snd_pcm_plugin_format tmpformat; |
376 | struct snd_pcm_plugin_format dstformat; | |
377 | struct snd_pcm_plugin_format srcformat; | |
fea952e5 | 378 | snd_pcm_access_t src_access, dst_access; |
6ac77bc1 | 379 | struct snd_pcm_plugin *plugin = NULL; |
1da177e4 LT |
380 | int err; |
381 | int stream = snd_pcm_plug_stream(plug); | |
382 | int slave_interleaved = (params_channels(slave_params) == 1 || | |
383 | params_access(slave_params) == SNDRV_PCM_ACCESS_RW_INTERLEAVED); | |
384 | ||
385 | switch (stream) { | |
386 | case SNDRV_PCM_STREAM_PLAYBACK: | |
387 | dstformat.format = params_format(slave_params); | |
388 | dstformat.rate = params_rate(slave_params); | |
389 | dstformat.channels = params_channels(slave_params); | |
390 | srcformat.format = params_format(params); | |
391 | srcformat.rate = params_rate(params); | |
392 | srcformat.channels = params_channels(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(params); | |
399 | dstformat.rate = params_rate(params); | |
400 | dstformat.channels = params_channels(params); | |
401 | srcformat.format = params_format(slave_params); | |
402 | srcformat.rate = params_rate(slave_params); | |
403 | srcformat.channels = params_channels(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) */ | |
0534ab42 TI |
424 | if (! rate_match(srcformat.rate, dstformat.rate) && |
425 | ! snd_pcm_format_linear(srcformat.format)) { | |
426 | if (srcformat.format != SNDRV_PCM_FORMAT_MU_LAW) | |
1da177e4 | 427 | return -EINVAL; |
0534ab42 TI |
428 | tmpformat.format = SNDRV_PCM_FORMAT_S16; |
429 | err = snd_pcm_plugin_build_mulaw(plug, | |
430 | &srcformat, &tmpformat, | |
431 | &plugin); | |
1da177e4 LT |
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) { | |
1da177e4 | 445 | tmpformat.channels = dstformat.channels; |
0534ab42 | 446 | err = snd_pcm_plugin_build_route(plug, &srcformat, &tmpformat, &plugin); |
1da177e4 | 447 | pdprintf("channels reduction: src=%i, dst=%i returns %i\n", srcformat.channels, tmpformat.channels, err); |
0534ab42 | 448 | if (err < 0) |
1da177e4 | 449 | return err; |
1da177e4 LT |
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(srcformat.rate, dstformat.rate)) { | |
0534ab42 TI |
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(plug, | |
465 | &srcformat, &tmpformat, | |
466 | &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 | } | |
1da177e4 | 477 | tmpformat.rate = dstformat.rate; |
1da177e4 LT |
478 | err = snd_pcm_plugin_build_rate(plug, |
479 | &srcformat, &tmpformat, | |
480 | &plugin); | |
481 | pdprintf("rate down resampling: src=%i, dst=%i returns %i\n", srcformat.rate, tmpformat.rate, err); | |
0534ab42 | 482 | if (err < 0) |
1da177e4 | 483 | return err; |
1da177e4 LT |
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 | ||
1da177e4 LT |
493 | /* format change */ |
494 | if (srcformat.format != dstformat.format) { | |
495 | tmpformat.format = dstformat.format; | |
c82590d2 TI |
496 | if (srcformat.format == SNDRV_PCM_FORMAT_MU_LAW || |
497 | tmpformat.format == SNDRV_PCM_FORMAT_MU_LAW) { | |
1da177e4 LT |
498 | err = snd_pcm_plugin_build_mulaw(plug, |
499 | &srcformat, &tmpformat, | |
500 | &plugin); | |
501 | } | |
502 | else if (snd_pcm_format_linear(srcformat.format) && | |
503 | snd_pcm_format_linear(tmpformat.format)) { | |
504 | err = snd_pcm_plugin_build_linear(plug, | |
505 | &srcformat, &tmpformat, | |
506 | &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 | ||
0534ab42 TI |
522 | /* channels extension */ |
523 | if (srcformat.channels < dstformat.channels) { | |
524 | tmpformat.channels = dstformat.channels; | |
525 | err = snd_pcm_plugin_build_route(plug, &srcformat, &tmpformat, &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 | ||
1da177e4 LT |
538 | /* de-interleave */ |
539 | if (src_access != dst_access) { | |
540 | err = snd_pcm_plugin_build_copy(plug, | |
541 | &srcformat, | |
542 | &tmpformat, | |
543 | &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 | ||
6ac77bc1 | 557 | snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(struct snd_pcm_substream *plug, |
1da177e4 LT |
558 | char *buf, |
559 | snd_pcm_uframes_t count, | |
6ac77bc1 | 560 | struct snd_pcm_plugin_channel **channels) |
1da177e4 | 561 | { |
6ac77bc1 TI |
562 | struct snd_pcm_plugin *plugin; |
563 | struct snd_pcm_plugin_channel *v; | |
564 | struct snd_pcm_plugin_format *format; | |
1da177e4 LT |
565 | int width, nchannels, channel; |
566 | int stream = snd_pcm_plug_stream(plug); | |
567 | ||
7eaa943c TI |
568 | if (snd_BUG_ON(!buf)) |
569 | return -ENXIO; | |
1da177e4 LT |
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; | |
51c816fd TI |
579 | width = snd_pcm_format_physical_width(format->format); |
580 | if (width < 0) | |
1da177e4 LT |
581 | return width; |
582 | nchannels = format->channels; | |
7eaa943c TI |
583 | if (snd_BUG_ON(plugin->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && |
584 | format->channels > 1)) | |
585 | return -ENXIO; | |
1da177e4 LT |
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 | ||
6ac77bc1 | 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) |
1da177e4 | 598 | { |
6ac77bc1 TI |
599 | struct snd_pcm_plugin *plugin, *next; |
600 | struct snd_pcm_plugin_channel *dst_channels; | |
1da177e4 LT |
601 | int err; |
602 | snd_pcm_sframes_t frames = size; | |
603 | ||
1da177e4 | 604 | plugin = snd_pcm_plug_first(plug); |
67089137 TI |
605 | while (plugin) { |
606 | if (frames <= 0) | |
607 | return frames; | |
51c816fd TI |
608 | next = plugin->next; |
609 | if (next) { | |
1da177e4 | 610 | snd_pcm_sframes_t frames1 = frames; |
67089137 | 611 | if (plugin->dst_frames) { |
1da177e4 | 612 | frames1 = plugin->dst_frames(plugin, frames); |
67089137 TI |
613 | if (frames1 <= 0) |
614 | return frames1; | |
615 | } | |
51c816fd TI |
616 | err = next->client_channels(next, frames1, &dst_channels); |
617 | if (err < 0) | |
1da177e4 | 618 | return err; |
1da177e4 LT |
619 | if (err != frames1) { |
620 | frames = err; | |
67089137 | 621 | if (plugin->src_frames) { |
1da177e4 | 622 | frames = plugin->src_frames(plugin, frames1); |
67089137 TI |
623 | if (frames <= 0) |
624 | return frames; | |
625 | } | |
1da177e4 LT |
626 | } |
627 | } else | |
628 | dst_channels = NULL; | |
629 | pdprintf("write plugin: %s, %li\n", plugin->name, frames); | |
51c816fd TI |
630 | frames = plugin->transfer(plugin, src_channels, dst_channels, frames); |
631 | if (frames < 0) | |
1da177e4 LT |
632 | return frames; |
633 | src_channels = dst_channels; | |
634 | plugin = next; | |
635 | } | |
ff7e06a5 | 636 | return calc_src_frames(plug, frames, true); |
1da177e4 LT |
637 | } |
638 | ||
6ac77bc1 | 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) |
1da177e4 | 640 | { |
6ac77bc1 TI |
641 | struct snd_pcm_plugin *plugin, *next; |
642 | struct snd_pcm_plugin_channel *src_channels, *dst_channels; | |
1da177e4 LT |
643 | snd_pcm_sframes_t frames = size; |
644 | int err; | |
645 | ||
ff7e06a5 | 646 | frames = calc_src_frames(plug, frames, true); |
1da177e4 LT |
647 | if (frames < 0) |
648 | return frames; | |
649 | ||
650 | src_channels = NULL; | |
651 | plugin = snd_pcm_plug_first(plug); | |
652 | while (plugin && frames > 0) { | |
51c816fd TI |
653 | next = plugin->next; |
654 | if (next) { | |
655 | err = plugin->client_channels(plugin, frames, &dst_channels); | |
656 | if (err < 0) | |
1da177e4 | 657 | return err; |
1da177e4 | 658 | frames = err; |
1da177e4 LT |
659 | } else { |
660 | dst_channels = dst_channels_final; | |
661 | } | |
662 | pdprintf("read plugin: %s, %li\n", plugin->name, frames); | |
51c816fd TI |
663 | frames = plugin->transfer(plugin, src_channels, dst_channels, frames); |
664 | if (frames < 0) | |
1da177e4 LT |
665 | return frames; |
666 | plugin = next; | |
667 | src_channels = dst_channels; | |
668 | } | |
669 | return frames; | |
670 | } | |
671 | ||
6ac77bc1 | 672 | int snd_pcm_area_silence(const struct snd_pcm_channel_area *dst_area, size_t dst_offset, |
fea952e5 | 673 | size_t samples, snd_pcm_format_t format) |
1da177e4 LT |
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, dst, 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 | ||
6ac77bc1 TI |
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, | |
fea952e5 | 720 | size_t samples, snd_pcm_format_t format) |
1da177e4 LT |
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 | } |