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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 | } | |
62 | if ((width = snd_pcm_format_physical_width(format->format)) < 0) | |
63 | return width; | |
64 | size = frames * format->channels * width; | |
7eaa943c TI |
65 | if (snd_BUG_ON(size % 8)) |
66 | return -ENXIO; | |
1da177e4 LT |
67 | size /= 8; |
68 | if (plugin->buf_frames < frames) { | |
69 | vfree(plugin->buf); | |
70 | plugin->buf = vmalloc(size); | |
71 | plugin->buf_frames = frames; | |
72 | } | |
73 | if (!plugin->buf) { | |
74 | plugin->buf_frames = 0; | |
75 | return -ENOMEM; | |
76 | } | |
77 | c = plugin->buf_channels; | |
78 | if (plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) { | |
79 | for (channel = 0; channel < format->channels; channel++, c++) { | |
80 | c->frames = frames; | |
81 | c->enabled = 1; | |
82 | c->wanted = 0; | |
83 | c->area.addr = plugin->buf; | |
84 | c->area.first = channel * width; | |
85 | c->area.step = format->channels * width; | |
86 | } | |
87 | } else if (plugin->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) { | |
7eaa943c TI |
88 | if (snd_BUG_ON(size % format->channels)) |
89 | return -EINVAL; | |
1da177e4 LT |
90 | size /= format->channels; |
91 | for (channel = 0; channel < format->channels; channel++, c++) { | |
92 | c->frames = frames; | |
93 | c->enabled = 1; | |
94 | c->wanted = 0; | |
95 | c->area.addr = plugin->buf + (channel * size); | |
96 | c->area.first = 0; | |
97 | c->area.step = width; | |
98 | } | |
99 | } else | |
100 | return -EINVAL; | |
101 | return 0; | |
102 | } | |
103 | ||
6ac77bc1 | 104 | int snd_pcm_plug_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t frames) |
1da177e4 LT |
105 | { |
106 | int err; | |
7eaa943c TI |
107 | if (snd_BUG_ON(!snd_pcm_plug_first(plug))) |
108 | return -ENXIO; | |
1da177e4 | 109 | if (snd_pcm_plug_stream(plug) == SNDRV_PCM_STREAM_PLAYBACK) { |
6ac77bc1 | 110 | struct snd_pcm_plugin *plugin = snd_pcm_plug_first(plug); |
1da177e4 LT |
111 | while (plugin->next) { |
112 | if (plugin->dst_frames) | |
113 | frames = plugin->dst_frames(plugin, frames); | |
7eaa943c TI |
114 | if (snd_BUG_ON(frames <= 0)) |
115 | return -ENXIO; | |
1da177e4 LT |
116 | plugin = plugin->next; |
117 | err = snd_pcm_plugin_alloc(plugin, frames); | |
118 | if (err < 0) | |
119 | return err; | |
120 | } | |
121 | } else { | |
6ac77bc1 | 122 | struct snd_pcm_plugin *plugin = snd_pcm_plug_last(plug); |
1da177e4 LT |
123 | while (plugin->prev) { |
124 | if (plugin->src_frames) | |
125 | frames = plugin->src_frames(plugin, frames); | |
7eaa943c TI |
126 | if (snd_BUG_ON(frames <= 0)) |
127 | return -ENXIO; | |
1da177e4 LT |
128 | plugin = plugin->prev; |
129 | err = snd_pcm_plugin_alloc(plugin, frames); | |
130 | if (err < 0) | |
131 | return err; | |
132 | } | |
133 | } | |
134 | return 0; | |
135 | } | |
136 | ||
137 | ||
6ac77bc1 | 138 | snd_pcm_sframes_t snd_pcm_plugin_client_channels(struct snd_pcm_plugin *plugin, |
1da177e4 | 139 | snd_pcm_uframes_t frames, |
6ac77bc1 | 140 | struct snd_pcm_plugin_channel **channels) |
1da177e4 LT |
141 | { |
142 | *channels = plugin->buf_channels; | |
143 | return frames; | |
144 | } | |
145 | ||
6ac77bc1 | 146 | int snd_pcm_plugin_build(struct snd_pcm_substream *plug, |
1da177e4 | 147 | const char *name, |
6ac77bc1 TI |
148 | struct snd_pcm_plugin_format *src_format, |
149 | struct snd_pcm_plugin_format *dst_format, | |
1da177e4 | 150 | size_t extra, |
6ac77bc1 | 151 | struct snd_pcm_plugin **ret) |
1da177e4 | 152 | { |
6ac77bc1 | 153 | struct snd_pcm_plugin *plugin; |
1da177e4 LT |
154 | unsigned int channels; |
155 | ||
7eaa943c TI |
156 | if (snd_BUG_ON(!plug)) |
157 | return -ENXIO; | |
158 | if (snd_BUG_ON(!src_format || !dst_format)) | |
159 | return -ENXIO; | |
ca2c0966 | 160 | plugin = kzalloc(sizeof(*plugin) + extra, GFP_KERNEL); |
1da177e4 LT |
161 | if (plugin == NULL) |
162 | return -ENOMEM; | |
163 | plugin->name = name; | |
164 | plugin->plug = plug; | |
165 | plugin->stream = snd_pcm_plug_stream(plug); | |
166 | plugin->access = SNDRV_PCM_ACCESS_RW_INTERLEAVED; | |
167 | plugin->src_format = *src_format; | |
168 | plugin->src_width = snd_pcm_format_physical_width(src_format->format); | |
7eaa943c | 169 | snd_BUG_ON(plugin->src_width <= 0); |
1da177e4 LT |
170 | plugin->dst_format = *dst_format; |
171 | plugin->dst_width = snd_pcm_format_physical_width(dst_format->format); | |
7eaa943c | 172 | snd_BUG_ON(plugin->dst_width <= 0); |
1da177e4 LT |
173 | if (plugin->stream == SNDRV_PCM_STREAM_PLAYBACK) |
174 | channels = src_format->channels; | |
175 | else | |
176 | channels = dst_format->channels; | |
177 | plugin->buf_channels = kcalloc(channels, sizeof(*plugin->buf_channels), GFP_KERNEL); | |
178 | if (plugin->buf_channels == NULL) { | |
179 | snd_pcm_plugin_free(plugin); | |
180 | return -ENOMEM; | |
181 | } | |
1da177e4 | 182 | plugin->client_channels = snd_pcm_plugin_client_channels; |
1da177e4 LT |
183 | *ret = plugin; |
184 | return 0; | |
185 | } | |
186 | ||
6ac77bc1 | 187 | int snd_pcm_plugin_free(struct snd_pcm_plugin *plugin) |
1da177e4 LT |
188 | { |
189 | if (! plugin) | |
190 | return 0; | |
191 | if (plugin->private_free) | |
192 | plugin->private_free(plugin); | |
193 | kfree(plugin->buf_channels); | |
194 | vfree(plugin->buf); | |
1da177e4 LT |
195 | kfree(plugin); |
196 | return 0; | |
197 | } | |
198 | ||
6ac77bc1 | 199 | snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *plug, snd_pcm_uframes_t drv_frames) |
1da177e4 | 200 | { |
6ac77bc1 | 201 | struct snd_pcm_plugin *plugin, *plugin_prev, *plugin_next; |
9af4e7fe | 202 | int stream; |
1da177e4 | 203 | |
7eaa943c TI |
204 | if (snd_BUG_ON(!plug)) |
205 | return -ENXIO; | |
1da177e4 LT |
206 | if (drv_frames == 0) |
207 | return 0; | |
9af4e7fe | 208 | stream = snd_pcm_plug_stream(plug); |
1da177e4 LT |
209 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
210 | plugin = snd_pcm_plug_last(plug); | |
211 | while (plugin && drv_frames > 0) { | |
212 | plugin_prev = plugin->prev; | |
213 | if (plugin->src_frames) | |
214 | drv_frames = plugin->src_frames(plugin, drv_frames); | |
215 | plugin = plugin_prev; | |
216 | } | |
217 | } else if (stream == SNDRV_PCM_STREAM_CAPTURE) { | |
218 | plugin = snd_pcm_plug_first(plug); | |
219 | while (plugin && drv_frames > 0) { | |
220 | plugin_next = plugin->next; | |
221 | if (plugin->dst_frames) | |
222 | drv_frames = plugin->dst_frames(plugin, drv_frames); | |
223 | plugin = plugin_next; | |
224 | } | |
225 | } else | |
226 | snd_BUG(); | |
227 | return drv_frames; | |
228 | } | |
229 | ||
6ac77bc1 | 230 | snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *plug, snd_pcm_uframes_t clt_frames) |
1da177e4 | 231 | { |
6ac77bc1 | 232 | struct snd_pcm_plugin *plugin, *plugin_prev, *plugin_next; |
1da177e4 | 233 | snd_pcm_sframes_t frames; |
701ef320 | 234 | int stream; |
1da177e4 | 235 | |
7eaa943c TI |
236 | if (snd_BUG_ON(!plug)) |
237 | return -ENXIO; | |
1da177e4 LT |
238 | if (clt_frames == 0) |
239 | return 0; | |
240 | frames = clt_frames; | |
701ef320 | 241 | stream = snd_pcm_plug_stream(plug); |
1da177e4 LT |
242 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
243 | plugin = snd_pcm_plug_first(plug); | |
244 | while (plugin && frames > 0) { | |
245 | plugin_next = plugin->next; | |
246 | if (plugin->dst_frames) { | |
247 | frames = plugin->dst_frames(plugin, frames); | |
248 | if (frames < 0) | |
249 | return frames; | |
250 | } | |
251 | plugin = plugin_next; | |
252 | } | |
253 | } else if (stream == SNDRV_PCM_STREAM_CAPTURE) { | |
254 | plugin = snd_pcm_plug_last(plug); | |
255 | while (plugin) { | |
256 | plugin_prev = plugin->prev; | |
257 | if (plugin->src_frames) { | |
258 | frames = plugin->src_frames(plugin, frames); | |
259 | if (frames < 0) | |
260 | return frames; | |
261 | } | |
262 | plugin = plugin_prev; | |
263 | } | |
264 | } else | |
265 | snd_BUG(); | |
266 | return frames; | |
267 | } | |
268 | ||
fea952e5 | 269 | static int snd_pcm_plug_formats(struct snd_mask *mask, snd_pcm_format_t format) |
1da177e4 | 270 | { |
6ac77bc1 | 271 | struct snd_mask formats = *mask; |
1da177e4 LT |
272 | u64 linfmts = (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S8 | |
273 | SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_S16_LE | | |
274 | SNDRV_PCM_FMTBIT_U16_BE | SNDRV_PCM_FMTBIT_S16_BE | | |
275 | SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_S24_LE | | |
276 | SNDRV_PCM_FMTBIT_U24_BE | SNDRV_PCM_FMTBIT_S24_BE | | |
64d27f96 TI |
277 | SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_S24_3LE | |
278 | SNDRV_PCM_FMTBIT_U24_3BE | SNDRV_PCM_FMTBIT_S24_3BE | | |
1da177e4 LT |
279 | SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_S32_LE | |
280 | SNDRV_PCM_FMTBIT_U32_BE | SNDRV_PCM_FMTBIT_S32_BE); | |
fea952e5 | 281 | snd_mask_set(&formats, (__force int)SNDRV_PCM_FORMAT_MU_LAW); |
1da177e4 LT |
282 | |
283 | if (formats.bits[0] & (u32)linfmts) | |
284 | formats.bits[0] |= (u32)linfmts; | |
285 | if (formats.bits[1] & (u32)(linfmts >> 32)) | |
286 | formats.bits[1] |= (u32)(linfmts >> 32); | |
fea952e5 | 287 | return snd_mask_test(&formats, (__force int)format); |
1da177e4 LT |
288 | } |
289 | ||
fea952e5 | 290 | static snd_pcm_format_t preferred_formats[] = { |
1da177e4 LT |
291 | SNDRV_PCM_FORMAT_S16_LE, |
292 | SNDRV_PCM_FORMAT_S16_BE, | |
293 | SNDRV_PCM_FORMAT_U16_LE, | |
294 | SNDRV_PCM_FORMAT_U16_BE, | |
64d27f96 TI |
295 | SNDRV_PCM_FORMAT_S24_3LE, |
296 | SNDRV_PCM_FORMAT_S24_3BE, | |
297 | SNDRV_PCM_FORMAT_U24_3LE, | |
298 | SNDRV_PCM_FORMAT_U24_3BE, | |
1da177e4 LT |
299 | SNDRV_PCM_FORMAT_S24_LE, |
300 | SNDRV_PCM_FORMAT_S24_BE, | |
301 | SNDRV_PCM_FORMAT_U24_LE, | |
302 | SNDRV_PCM_FORMAT_U24_BE, | |
303 | SNDRV_PCM_FORMAT_S32_LE, | |
304 | SNDRV_PCM_FORMAT_S32_BE, | |
305 | SNDRV_PCM_FORMAT_U32_LE, | |
306 | SNDRV_PCM_FORMAT_U32_BE, | |
307 | SNDRV_PCM_FORMAT_S8, | |
308 | SNDRV_PCM_FORMAT_U8 | |
309 | }; | |
310 | ||
fea952e5 CL |
311 | snd_pcm_format_t snd_pcm_plug_slave_format(snd_pcm_format_t format, |
312 | struct snd_mask *format_mask) | |
1da177e4 | 313 | { |
64d27f96 TI |
314 | int i; |
315 | ||
fea952e5 | 316 | if (snd_mask_test(format_mask, (__force int)format)) |
1da177e4 | 317 | return format; |
fea952e5 CL |
318 | if (!snd_pcm_plug_formats(format_mask, format)) |
319 | return (__force snd_pcm_format_t)-EINVAL; | |
1da177e4 | 320 | if (snd_pcm_format_linear(format)) { |
64d27f96 TI |
321 | unsigned int width = snd_pcm_format_width(format); |
322 | int unsignd = snd_pcm_format_unsigned(format) > 0; | |
323 | int big = snd_pcm_format_big_endian(format) > 0; | |
324 | unsigned int badness, best = -1; | |
fea952e5 | 325 | snd_pcm_format_t best_format = (__force snd_pcm_format_t)-1; |
64d27f96 | 326 | for (i = 0; i < ARRAY_SIZE(preferred_formats); i++) { |
fea952e5 | 327 | snd_pcm_format_t f = preferred_formats[i]; |
64d27f96 | 328 | unsigned int w; |
fea952e5 | 329 | if (!snd_mask_test(format_mask, (__force int)f)) |
64d27f96 TI |
330 | continue; |
331 | w = snd_pcm_format_width(f); | |
332 | if (w >= width) | |
333 | badness = w - width; | |
334 | else | |
335 | badness = width - w + 32; | |
336 | badness += snd_pcm_format_unsigned(f) != unsignd; | |
337 | badness += snd_pcm_format_big_endian(f) != big; | |
338 | if (badness < best) { | |
339 | best_format = f; | |
340 | best = badness; | |
1da177e4 | 341 | } |
1da177e4 | 342 | } |
fea952e5 CL |
343 | if ((__force int)best_format >= 0) |
344 | return best_format; | |
345 | else | |
346 | return (__force snd_pcm_format_t)-EINVAL; | |
1da177e4 | 347 | } else { |
1da177e4 LT |
348 | switch (format) { |
349 | case SNDRV_PCM_FORMAT_MU_LAW: | |
350 | for (i = 0; i < ARRAY_SIZE(preferred_formats); ++i) { | |
fea952e5 CL |
351 | snd_pcm_format_t format1 = preferred_formats[i]; |
352 | if (snd_mask_test(format_mask, (__force int)format1)) | |
1da177e4 LT |
353 | return format1; |
354 | } | |
355 | default: | |
fea952e5 | 356 | return (__force snd_pcm_format_t)-EINVAL; |
1da177e4 LT |
357 | } |
358 | } | |
359 | } | |
360 | ||
6ac77bc1 TI |
361 | int snd_pcm_plug_format_plugins(struct snd_pcm_substream *plug, |
362 | struct snd_pcm_hw_params *params, | |
363 | struct snd_pcm_hw_params *slave_params) | |
1da177e4 | 364 | { |
6ac77bc1 TI |
365 | struct snd_pcm_plugin_format tmpformat; |
366 | struct snd_pcm_plugin_format dstformat; | |
367 | struct snd_pcm_plugin_format srcformat; | |
fea952e5 | 368 | snd_pcm_access_t src_access, dst_access; |
6ac77bc1 | 369 | struct snd_pcm_plugin *plugin = NULL; |
1da177e4 LT |
370 | int err; |
371 | int stream = snd_pcm_plug_stream(plug); | |
372 | int slave_interleaved = (params_channels(slave_params) == 1 || | |
373 | params_access(slave_params) == SNDRV_PCM_ACCESS_RW_INTERLEAVED); | |
374 | ||
375 | switch (stream) { | |
376 | case SNDRV_PCM_STREAM_PLAYBACK: | |
377 | dstformat.format = params_format(slave_params); | |
378 | dstformat.rate = params_rate(slave_params); | |
379 | dstformat.channels = params_channels(slave_params); | |
380 | srcformat.format = params_format(params); | |
381 | srcformat.rate = params_rate(params); | |
382 | srcformat.channels = params_channels(params); | |
383 | src_access = SNDRV_PCM_ACCESS_RW_INTERLEAVED; | |
384 | dst_access = (slave_interleaved ? SNDRV_PCM_ACCESS_RW_INTERLEAVED : | |
385 | SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); | |
386 | break; | |
387 | case SNDRV_PCM_STREAM_CAPTURE: | |
388 | dstformat.format = params_format(params); | |
389 | dstformat.rate = params_rate(params); | |
390 | dstformat.channels = params_channels(params); | |
391 | srcformat.format = params_format(slave_params); | |
392 | srcformat.rate = params_rate(slave_params); | |
393 | srcformat.channels = params_channels(slave_params); | |
394 | src_access = (slave_interleaved ? SNDRV_PCM_ACCESS_RW_INTERLEAVED : | |
395 | SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); | |
396 | dst_access = SNDRV_PCM_ACCESS_RW_INTERLEAVED; | |
397 | break; | |
398 | default: | |
399 | snd_BUG(); | |
400 | return -EINVAL; | |
401 | } | |
402 | tmpformat = srcformat; | |
403 | ||
404 | pdprintf("srcformat: format=%i, rate=%i, channels=%i\n", | |
405 | srcformat.format, | |
406 | srcformat.rate, | |
407 | srcformat.channels); | |
408 | pdprintf("dstformat: format=%i, rate=%i, channels=%i\n", | |
409 | dstformat.format, | |
410 | dstformat.rate, | |
411 | dstformat.channels); | |
412 | ||
413 | /* Format change (linearization) */ | |
0534ab42 TI |
414 | if (! rate_match(srcformat.rate, dstformat.rate) && |
415 | ! snd_pcm_format_linear(srcformat.format)) { | |
416 | if (srcformat.format != SNDRV_PCM_FORMAT_MU_LAW) | |
1da177e4 | 417 | return -EINVAL; |
0534ab42 TI |
418 | tmpformat.format = SNDRV_PCM_FORMAT_S16; |
419 | err = snd_pcm_plugin_build_mulaw(plug, | |
420 | &srcformat, &tmpformat, | |
421 | &plugin); | |
1da177e4 LT |
422 | if (err < 0) |
423 | return err; | |
424 | err = snd_pcm_plugin_append(plugin); | |
425 | if (err < 0) { | |
426 | snd_pcm_plugin_free(plugin); | |
427 | return err; | |
428 | } | |
429 | srcformat = tmpformat; | |
430 | src_access = dst_access; | |
431 | } | |
432 | ||
433 | /* channels reduction */ | |
434 | if (srcformat.channels > dstformat.channels) { | |
1da177e4 | 435 | tmpformat.channels = dstformat.channels; |
0534ab42 | 436 | err = snd_pcm_plugin_build_route(plug, &srcformat, &tmpformat, &plugin); |
1da177e4 | 437 | pdprintf("channels reduction: src=%i, dst=%i returns %i\n", srcformat.channels, tmpformat.channels, err); |
0534ab42 | 438 | if (err < 0) |
1da177e4 | 439 | return err; |
1da177e4 LT |
440 | err = snd_pcm_plugin_append(plugin); |
441 | if (err < 0) { | |
442 | snd_pcm_plugin_free(plugin); | |
443 | return err; | |
444 | } | |
445 | srcformat = tmpformat; | |
446 | src_access = dst_access; | |
447 | } | |
448 | ||
449 | /* rate resampling */ | |
450 | if (!rate_match(srcformat.rate, dstformat.rate)) { | |
0534ab42 TI |
451 | if (srcformat.format != SNDRV_PCM_FORMAT_S16) { |
452 | /* convert to S16 for resampling */ | |
453 | tmpformat.format = SNDRV_PCM_FORMAT_S16; | |
454 | err = snd_pcm_plugin_build_linear(plug, | |
455 | &srcformat, &tmpformat, | |
456 | &plugin); | |
457 | if (err < 0) | |
458 | return err; | |
459 | err = snd_pcm_plugin_append(plugin); | |
460 | if (err < 0) { | |
461 | snd_pcm_plugin_free(plugin); | |
462 | return err; | |
463 | } | |
464 | srcformat = tmpformat; | |
465 | src_access = dst_access; | |
466 | } | |
1da177e4 | 467 | tmpformat.rate = dstformat.rate; |
1da177e4 LT |
468 | err = snd_pcm_plugin_build_rate(plug, |
469 | &srcformat, &tmpformat, | |
470 | &plugin); | |
471 | pdprintf("rate down resampling: src=%i, dst=%i returns %i\n", srcformat.rate, tmpformat.rate, err); | |
0534ab42 | 472 | if (err < 0) |
1da177e4 | 473 | return err; |
1da177e4 LT |
474 | err = snd_pcm_plugin_append(plugin); |
475 | if (err < 0) { | |
476 | snd_pcm_plugin_free(plugin); | |
477 | return err; | |
478 | } | |
479 | srcformat = tmpformat; | |
480 | src_access = dst_access; | |
481 | } | |
482 | ||
1da177e4 LT |
483 | /* format change */ |
484 | if (srcformat.format != dstformat.format) { | |
485 | tmpformat.format = dstformat.format; | |
c82590d2 TI |
486 | if (srcformat.format == SNDRV_PCM_FORMAT_MU_LAW || |
487 | tmpformat.format == SNDRV_PCM_FORMAT_MU_LAW) { | |
1da177e4 LT |
488 | err = snd_pcm_plugin_build_mulaw(plug, |
489 | &srcformat, &tmpformat, | |
490 | &plugin); | |
491 | } | |
492 | else if (snd_pcm_format_linear(srcformat.format) && | |
493 | snd_pcm_format_linear(tmpformat.format)) { | |
494 | err = snd_pcm_plugin_build_linear(plug, | |
495 | &srcformat, &tmpformat, | |
496 | &plugin); | |
497 | } | |
498 | else | |
499 | return -EINVAL; | |
500 | pdprintf("format change: src=%i, dst=%i returns %i\n", srcformat.format, tmpformat.format, err); | |
501 | if (err < 0) | |
502 | return err; | |
503 | err = snd_pcm_plugin_append(plugin); | |
504 | if (err < 0) { | |
505 | snd_pcm_plugin_free(plugin); | |
506 | return err; | |
507 | } | |
508 | srcformat = tmpformat; | |
509 | src_access = dst_access; | |
510 | } | |
511 | ||
0534ab42 TI |
512 | /* channels extension */ |
513 | if (srcformat.channels < dstformat.channels) { | |
514 | tmpformat.channels = dstformat.channels; | |
515 | err = snd_pcm_plugin_build_route(plug, &srcformat, &tmpformat, &plugin); | |
516 | pdprintf("channels extension: src=%i, dst=%i returns %i\n", srcformat.channels, tmpformat.channels, err); | |
517 | if (err < 0) | |
518 | return err; | |
519 | err = snd_pcm_plugin_append(plugin); | |
520 | if (err < 0) { | |
521 | snd_pcm_plugin_free(plugin); | |
522 | return err; | |
523 | } | |
524 | srcformat = tmpformat; | |
525 | src_access = dst_access; | |
526 | } | |
527 | ||
1da177e4 LT |
528 | /* de-interleave */ |
529 | if (src_access != dst_access) { | |
530 | err = snd_pcm_plugin_build_copy(plug, | |
531 | &srcformat, | |
532 | &tmpformat, | |
533 | &plugin); | |
534 | pdprintf("interleave change (copy: returns %i)\n", err); | |
535 | if (err < 0) | |
536 | return err; | |
537 | err = snd_pcm_plugin_append(plugin); | |
538 | if (err < 0) { | |
539 | snd_pcm_plugin_free(plugin); | |
540 | return err; | |
541 | } | |
542 | } | |
543 | ||
544 | return 0; | |
545 | } | |
546 | ||
6ac77bc1 | 547 | snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(struct snd_pcm_substream *plug, |
1da177e4 LT |
548 | char *buf, |
549 | snd_pcm_uframes_t count, | |
6ac77bc1 | 550 | struct snd_pcm_plugin_channel **channels) |
1da177e4 | 551 | { |
6ac77bc1 TI |
552 | struct snd_pcm_plugin *plugin; |
553 | struct snd_pcm_plugin_channel *v; | |
554 | struct snd_pcm_plugin_format *format; | |
1da177e4 LT |
555 | int width, nchannels, channel; |
556 | int stream = snd_pcm_plug_stream(plug); | |
557 | ||
7eaa943c TI |
558 | if (snd_BUG_ON(!buf)) |
559 | return -ENXIO; | |
1da177e4 LT |
560 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
561 | plugin = snd_pcm_plug_first(plug); | |
562 | format = &plugin->src_format; | |
563 | } else { | |
564 | plugin = snd_pcm_plug_last(plug); | |
565 | format = &plugin->dst_format; | |
566 | } | |
567 | v = plugin->buf_channels; | |
568 | *channels = v; | |
569 | if ((width = snd_pcm_format_physical_width(format->format)) < 0) | |
570 | return width; | |
571 | nchannels = format->channels; | |
7eaa943c TI |
572 | if (snd_BUG_ON(plugin->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && |
573 | format->channels > 1)) | |
574 | return -ENXIO; | |
1da177e4 LT |
575 | for (channel = 0; channel < nchannels; channel++, v++) { |
576 | v->frames = count; | |
577 | v->enabled = 1; | |
578 | v->wanted = (stream == SNDRV_PCM_STREAM_CAPTURE); | |
579 | v->area.addr = buf; | |
580 | v->area.first = channel * width; | |
581 | v->area.step = nchannels * width; | |
582 | } | |
583 | return count; | |
584 | } | |
585 | ||
6ac77bc1 | 586 | 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 | 587 | { |
6ac77bc1 TI |
588 | struct snd_pcm_plugin *plugin, *next; |
589 | struct snd_pcm_plugin_channel *dst_channels; | |
1da177e4 LT |
590 | int err; |
591 | snd_pcm_sframes_t frames = size; | |
592 | ||
1da177e4 LT |
593 | plugin = snd_pcm_plug_first(plug); |
594 | while (plugin && frames > 0) { | |
595 | if ((next = plugin->next) != NULL) { | |
596 | snd_pcm_sframes_t frames1 = frames; | |
597 | if (plugin->dst_frames) | |
598 | frames1 = plugin->dst_frames(plugin, frames); | |
599 | if ((err = next->client_channels(next, frames1, &dst_channels)) < 0) { | |
600 | return err; | |
601 | } | |
602 | if (err != frames1) { | |
603 | frames = err; | |
604 | if (plugin->src_frames) | |
605 | frames = plugin->src_frames(plugin, frames1); | |
606 | } | |
607 | } else | |
608 | dst_channels = NULL; | |
609 | pdprintf("write plugin: %s, %li\n", plugin->name, frames); | |
610 | if ((frames = plugin->transfer(plugin, src_channels, dst_channels, frames)) < 0) | |
611 | return frames; | |
612 | src_channels = dst_channels; | |
613 | plugin = next; | |
614 | } | |
615 | return snd_pcm_plug_client_size(plug, frames); | |
616 | } | |
617 | ||
6ac77bc1 | 618 | 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 | 619 | { |
6ac77bc1 TI |
620 | struct snd_pcm_plugin *plugin, *next; |
621 | struct snd_pcm_plugin_channel *src_channels, *dst_channels; | |
1da177e4 LT |
622 | snd_pcm_sframes_t frames = size; |
623 | int err; | |
624 | ||
625 | frames = snd_pcm_plug_slave_size(plug, frames); | |
626 | if (frames < 0) | |
627 | return frames; | |
628 | ||
629 | src_channels = NULL; | |
630 | plugin = snd_pcm_plug_first(plug); | |
631 | while (plugin && frames > 0) { | |
632 | if ((next = plugin->next) != NULL) { | |
633 | if ((err = plugin->client_channels(plugin, frames, &dst_channels)) < 0) { | |
634 | return err; | |
635 | } | |
636 | frames = err; | |
1da177e4 LT |
637 | } else { |
638 | dst_channels = dst_channels_final; | |
639 | } | |
640 | pdprintf("read plugin: %s, %li\n", plugin->name, frames); | |
641 | if ((frames = plugin->transfer(plugin, src_channels, dst_channels, frames)) < 0) | |
642 | return frames; | |
643 | plugin = next; | |
644 | src_channels = dst_channels; | |
645 | } | |
646 | return frames; | |
647 | } | |
648 | ||
6ac77bc1 | 649 | int snd_pcm_area_silence(const struct snd_pcm_channel_area *dst_area, size_t dst_offset, |
fea952e5 | 650 | size_t samples, snd_pcm_format_t format) |
1da177e4 LT |
651 | { |
652 | /* FIXME: sub byte resolution and odd dst_offset */ | |
653 | unsigned char *dst; | |
654 | unsigned int dst_step; | |
655 | int width; | |
656 | const unsigned char *silence; | |
657 | if (!dst_area->addr) | |
658 | return 0; | |
659 | dst = dst_area->addr + (dst_area->first + dst_area->step * dst_offset) / 8; | |
660 | width = snd_pcm_format_physical_width(format); | |
661 | if (width <= 0) | |
662 | return -EINVAL; | |
663 | if (dst_area->step == (unsigned int) width && width >= 8) | |
664 | return snd_pcm_format_set_silence(format, dst, samples); | |
665 | silence = snd_pcm_format_silence_64(format); | |
666 | if (! silence) | |
667 | return -EINVAL; | |
668 | dst_step = dst_area->step / 8; | |
669 | if (width == 4) { | |
670 | /* Ima ADPCM */ | |
671 | int dstbit = dst_area->first % 8; | |
672 | int dstbit_step = dst_area->step % 8; | |
673 | while (samples-- > 0) { | |
674 | if (dstbit) | |
675 | *dst &= 0xf0; | |
676 | else | |
677 | *dst &= 0x0f; | |
678 | dst += dst_step; | |
679 | dstbit += dstbit_step; | |
680 | if (dstbit == 8) { | |
681 | dst++; | |
682 | dstbit = 0; | |
683 | } | |
684 | } | |
685 | } else { | |
686 | width /= 8; | |
687 | while (samples-- > 0) { | |
688 | memcpy(dst, silence, width); | |
689 | dst += dst_step; | |
690 | } | |
691 | } | |
692 | return 0; | |
693 | } | |
694 | ||
6ac77bc1 TI |
695 | int snd_pcm_area_copy(const struct snd_pcm_channel_area *src_area, size_t src_offset, |
696 | const struct snd_pcm_channel_area *dst_area, size_t dst_offset, | |
fea952e5 | 697 | size_t samples, snd_pcm_format_t format) |
1da177e4 LT |
698 | { |
699 | /* FIXME: sub byte resolution and odd dst_offset */ | |
700 | char *src, *dst; | |
701 | int width; | |
702 | int src_step, dst_step; | |
703 | src = src_area->addr + (src_area->first + src_area->step * src_offset) / 8; | |
704 | if (!src_area->addr) | |
705 | return snd_pcm_area_silence(dst_area, dst_offset, samples, format); | |
706 | dst = dst_area->addr + (dst_area->first + dst_area->step * dst_offset) / 8; | |
707 | if (!dst_area->addr) | |
708 | return 0; | |
709 | width = snd_pcm_format_physical_width(format); | |
710 | if (width <= 0) | |
711 | return -EINVAL; | |
712 | if (src_area->step == (unsigned int) width && | |
713 | dst_area->step == (unsigned int) width && width >= 8) { | |
714 | size_t bytes = samples * width / 8; | |
715 | memcpy(dst, src, bytes); | |
716 | return 0; | |
717 | } | |
718 | src_step = src_area->step / 8; | |
719 | dst_step = dst_area->step / 8; | |
720 | if (width == 4) { | |
721 | /* Ima ADPCM */ | |
722 | int srcbit = src_area->first % 8; | |
723 | int srcbit_step = src_area->step % 8; | |
724 | int dstbit = dst_area->first % 8; | |
725 | int dstbit_step = dst_area->step % 8; | |
726 | while (samples-- > 0) { | |
727 | unsigned char srcval; | |
728 | if (srcbit) | |
729 | srcval = *src & 0x0f; | |
730 | else | |
731 | srcval = (*src & 0xf0) >> 4; | |
732 | if (dstbit) | |
733 | *dst = (*dst & 0xf0) | srcval; | |
734 | else | |
735 | *dst = (*dst & 0x0f) | (srcval << 4); | |
736 | src += src_step; | |
737 | srcbit += srcbit_step; | |
738 | if (srcbit == 8) { | |
739 | src++; | |
740 | srcbit = 0; | |
741 | } | |
742 | dst += dst_step; | |
743 | dstbit += dstbit_step; | |
744 | if (dstbit == 8) { | |
745 | dst++; | |
746 | dstbit = 0; | |
747 | } | |
748 | } | |
749 | } else { | |
750 | width /= 8; | |
751 | while (samples-- > 0) { | |
752 | memcpy(dst, src, width); | |
753 | src += src_step; | |
754 | dst += dst_step; | |
755 | } | |
756 | } | |
757 | return 0; | |
758 | } |