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[PATCH] Avoid console spam with ext3 aborted journal.
[linux-2.6/verdex.git] / sound / core / oss / route.c
blobc955b7dfdb30fc4f5ba0f523c29a77091bc2d5af
1 /*
2 * Attenuated route Plug-In
3 * Copyright (c) 2000 by Abramo Bagnara <abramo@alsa-project.org>
4 *
5 *
6 * This library is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU Library General Public License as
8 * published by the Free Software Foundation; either version 2 of
9 * the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #include <sound/driver.h>
23 #include <linux/slab.h>
24 #include <linux/time.h>
25 #include <sound/core.h>
26 #include <sound/pcm.h>
27 #include "pcm_plugin.h"
28
29 /* The best possible hack to support missing optimization in gcc 2.7.2.3 */
30 #if ROUTE_PLUGIN_RESOLUTION & (ROUTE_PLUGIN_RESOLUTION - 1) != 0
31 #define div(a) a /= ROUTE_PLUGIN_RESOLUTION
32 #elif ROUTE_PLUGIN_RESOLUTION == 16
33 #define div(a) a >>= 4
34 #else
35 #error "Add some code here"
36 #endif
37
38 typedef struct ttable_dst ttable_dst_t;
39 typedef struct route_private_data route_t;
40
41 typedef void (*route_channel_f)(snd_pcm_plugin_t *plugin,
42 const snd_pcm_plugin_channel_t *src_channels,
43 snd_pcm_plugin_channel_t *dst_channel,
44 ttable_dst_t* ttable, snd_pcm_uframes_t frames);
45
46 typedef struct {
47 int channel;
48 int as_int;
49 } ttable_src_t;
50
51 struct ttable_dst {
52 int att; /* Attenuated */
53 unsigned int nsrcs;
54 ttable_src_t* srcs;
55 route_channel_f func;
56 };
57
58 struct route_private_data {
59 enum {R_UINT32=0, R_UINT64=1} sum_type;
60 int get, put;
61 int conv;
62 int src_sample_size;
63 ttable_dst_t ttable[0];
64 };
65
66 typedef union {
67 u_int32_t as_uint32;
68 u_int64_t as_uint64;
69 } sum_t;
70
71
72 static void route_to_channel_from_zero(snd_pcm_plugin_t *plugin,
73 const snd_pcm_plugin_channel_t *src_channels ATTRIBUTE_UNUSED,
74 snd_pcm_plugin_channel_t *dst_channel,
75 ttable_dst_t* ttable ATTRIBUTE_UNUSED, snd_pcm_uframes_t frames)
76 {
77 if (dst_channel->wanted)
78 snd_pcm_area_silence(&dst_channel->area, 0, frames, plugin->dst_format.format);
79 dst_channel->enabled = 0;
80 }
81
82 static void route_to_channel_from_one(snd_pcm_plugin_t *plugin,
83 const snd_pcm_plugin_channel_t *src_channels,
84 snd_pcm_plugin_channel_t *dst_channel,
85 ttable_dst_t* ttable, snd_pcm_uframes_t frames)
86 {
87 #define CONV_LABELS
88 #include "plugin_ops.h"
89 #undef CONV_LABELS
90 route_t *data = (route_t *)plugin->extra_data;
91 void *conv;
92 const snd_pcm_plugin_channel_t *src_channel = NULL;
93 unsigned int srcidx;
94 char *src, *dst;
95 int src_step, dst_step;
96 for (srcidx = 0; srcidx < ttable->nsrcs; ++srcidx) {
97 src_channel = &src_channels[ttable->srcs[srcidx].channel];
98 if (src_channel->area.addr != NULL)
99 break;
100 }
101 if (srcidx == ttable->nsrcs) {
102 route_to_channel_from_zero(plugin, src_channels, dst_channel, ttable, frames);
103 return;
104 }
105
106 dst_channel->enabled = 1;
107 conv = conv_labels[data->conv];
108 src = src_channel->area.addr + src_channel->area.first / 8;
109 src_step = src_channel->area.step / 8;
110 dst = dst_channel->area.addr + dst_channel->area.first / 8;
111 dst_step = dst_channel->area.step / 8;
112 while (frames-- > 0) {
113 goto *conv;
114 #define CONV_END after
115 #include "plugin_ops.h"
116 #undef CONV_END
117 after:
118 src += src_step;
119 dst += dst_step;
120 }
121 }
122
123 static void route_to_channel(snd_pcm_plugin_t *plugin,
124 const snd_pcm_plugin_channel_t *src_channels,
125 snd_pcm_plugin_channel_t *dst_channel,
126 ttable_dst_t* ttable, snd_pcm_uframes_t frames)
127 {
128 #define GET_U_LABELS
129 #define PUT_U32_LABELS
130 #include "plugin_ops.h"
131 #undef GET_U_LABELS
132 #undef PUT_U32_LABELS
133 static void *zero_labels[2] = { &&zero_int32, &&zero_int64 };
134 /* sum_type att */
135 static void *add_labels[2 * 2] = { &&add_int32_noatt, &&add_int32_att,
136 &&add_int64_noatt, &&add_int64_att,
137 };
138 /* sum_type att shift */
139 static void *norm_labels[2 * 2 * 4] = { NULL,
140 &&norm_int32_8_noatt,
141 &&norm_int32_16_noatt,
142 &&norm_int32_24_noatt,
143 NULL,
144 &&norm_int32_8_att,
145 &&norm_int32_16_att,
146 &&norm_int32_24_att,
147 &&norm_int64_0_noatt,
148 &&norm_int64_8_noatt,
149 &&norm_int64_16_noatt,
150 &&norm_int64_24_noatt,
151 &&norm_int64_0_att,
152 &&norm_int64_8_att,
153 &&norm_int64_16_att,
154 &&norm_int64_24_att,
155 };
156 route_t *data = (route_t *)plugin->extra_data;
157 void *zero, *get, *add, *norm, *put_u32;
158 int nsrcs = ttable->nsrcs;
159 char *dst;
160 int dst_step;
161 char *srcs[nsrcs];
162 int src_steps[nsrcs];
163 ttable_src_t src_tt[nsrcs];
164 u_int32_t sample = 0;
165 int srcidx, srcidx1 = 0;
166 for (srcidx = 0; srcidx < nsrcs; ++srcidx) {
167 const snd_pcm_plugin_channel_t *src_channel = &src_channels[ttable->srcs[srcidx].channel];
168 if (!src_channel->enabled)
169 continue;
170 srcs[srcidx1] = src_channel->area.addr + src_channel->area.first / 8;
171 src_steps[srcidx1] = src_channel->area.step / 8;
172 src_tt[srcidx1] = ttable->srcs[srcidx];
173 srcidx1++;
174 }
175 nsrcs = srcidx1;
176 if (nsrcs == 0) {
177 route_to_channel_from_zero(plugin, src_channels, dst_channel, ttable, frames);
178 return;
179 } else if (nsrcs == 1 && src_tt[0].as_int == ROUTE_PLUGIN_RESOLUTION) {
180 route_to_channel_from_one(plugin, src_channels, dst_channel, ttable, frames);
181 return;
182 }
183
184 dst_channel->enabled = 1;
185 zero = zero_labels[data->sum_type];
186 get = get_u_labels[data->get];
187 add = add_labels[data->sum_type * 2 + ttable->att];
188 norm = norm_labels[data->sum_type * 8 + ttable->att * 4 + 4 - data->src_sample_size];
189 put_u32 = put_u32_labels[data->put];
190 dst = dst_channel->area.addr + dst_channel->area.first / 8;
191 dst_step = dst_channel->area.step / 8;
192
193 while (frames-- > 0) {
194 ttable_src_t *ttp = src_tt;
195 sum_t sum;
196
197 /* Zero sum */
198 goto *zero;
199 zero_int32:
200 sum.as_uint32 = 0;
201 goto zero_end;
202 zero_int64:
203 sum.as_uint64 = 0;
204 goto zero_end;
205 zero_end:
206 for (srcidx = 0; srcidx < nsrcs; ++srcidx) {
207 char *src = srcs[srcidx];
208
209 /* Get sample */
210 goto *get;
211 #define GET_U_END after_get
212 #include "plugin_ops.h"
213 #undef GET_U_END
214 after_get:
215
216 /* Sum */
217 goto *add;
218 add_int32_att:
219 sum.as_uint32 += sample * ttp->as_int;
220 goto after_sum;
221 add_int32_noatt:
222 if (ttp->as_int)
223 sum.as_uint32 += sample;
224 goto after_sum;
225 add_int64_att:
226 sum.as_uint64 += (u_int64_t) sample * ttp->as_int;
227 goto after_sum;
228 add_int64_noatt:
229 if (ttp->as_int)
230 sum.as_uint64 += sample;
231 goto after_sum;
232 after_sum:
233 srcs[srcidx] += src_steps[srcidx];
234 ttp++;
235 }
236
237 /* Normalization */
238 goto *norm;
239 norm_int32_8_att:
240 sum.as_uint64 = sum.as_uint32;
241 norm_int64_8_att:
242 sum.as_uint64 <<= 8;
243 norm_int64_0_att:
244 div(sum.as_uint64);
245 goto norm_int;
246
247 norm_int32_16_att:
248 sum.as_uint64 = sum.as_uint32;
249 norm_int64_16_att:
250 sum.as_uint64 <<= 16;
251 div(sum.as_uint64);
252 goto norm_int;
253
254 norm_int32_24_att:
255 sum.as_uint64 = sum.as_uint32;
256 norm_int64_24_att:
257 sum.as_uint64 <<= 24;
258 div(sum.as_uint64);
259 goto norm_int;
260
261 norm_int32_8_noatt:
262 sum.as_uint64 = sum.as_uint32;
263 norm_int64_8_noatt:
264 sum.as_uint64 <<= 8;
265 goto norm_int;
266
267 norm_int32_16_noatt:
268 sum.as_uint64 = sum.as_uint32;
269 norm_int64_16_noatt:
270 sum.as_uint64 <<= 16;
271 goto norm_int;
272
273 norm_int32_24_noatt:
274 sum.as_uint64 = sum.as_uint32;
275 norm_int64_24_noatt:
276 sum.as_uint64 <<= 24;
277 goto norm_int;
278
279 norm_int64_0_noatt:
280 norm_int:
281 if (sum.as_uint64 > (u_int32_t)0xffffffff)
282 sample = (u_int32_t)0xffffffff;
283 else
284 sample = sum.as_uint64;
285 goto after_norm;
286
287 after_norm:
288
289 /* Put sample */
290 goto *put_u32;
291 #define PUT_U32_END after_put_u32
292 #include "plugin_ops.h"
293 #undef PUT_U32_END
294 after_put_u32:
295
296 dst += dst_step;
297 }
298 }
299
300 static int route_src_channels_mask(snd_pcm_plugin_t *plugin,
301 bitset_t *dst_vmask,
302 bitset_t **src_vmask)
303 {
304 route_t *data = (route_t *)plugin->extra_data;
305 int schannels = plugin->src_format.channels;
306 int dchannels = plugin->dst_format.channels;
307 bitset_t *vmask = plugin->src_vmask;
308 int channel;
309 ttable_dst_t *dp = data->ttable;
310 bitset_zero(vmask, schannels);
311 for (channel = 0; channel < dchannels; channel++, dp++) {
312 unsigned int src;
313 ttable_src_t *sp;
314 if (!bitset_get(dst_vmask, channel))
315 continue;
316 sp = dp->srcs;
317 for (src = 0; src < dp->nsrcs; src++, sp++)
318 bitset_set(vmask, sp->channel);
319 }
320 *src_vmask = vmask;
321 return 0;
322 }
323
324 static int route_dst_channels_mask(snd_pcm_plugin_t *plugin,
325 bitset_t *src_vmask,
326 bitset_t **dst_vmask)
327 {
328 route_t *data = (route_t *)plugin->extra_data;
329 int dchannels = plugin->dst_format.channels;
330 bitset_t *vmask = plugin->dst_vmask;
331 int channel;
332 ttable_dst_t *dp = data->ttable;
333 bitset_zero(vmask, dchannels);
334 for (channel = 0; channel < dchannels; channel++, dp++) {
335 unsigned int src;
336 ttable_src_t *sp;
337 sp = dp->srcs;
338 for (src = 0; src < dp->nsrcs; src++, sp++) {
339 if (bitset_get(src_vmask, sp->channel)) {
340 bitset_set(vmask, channel);
341 break;
342 }
343 }
344 }
345 *dst_vmask = vmask;
346 return 0;
347 }
348
349 static void route_free(snd_pcm_plugin_t *plugin)
350 {
351 route_t *data = (route_t *)plugin->extra_data;
352 unsigned int dst_channel;
353 for (dst_channel = 0; dst_channel < plugin->dst_format.channels; ++dst_channel) {
354 kfree(data->ttable[dst_channel].srcs);
355 }
356 }
357
358 static int route_load_ttable(snd_pcm_plugin_t *plugin,
359 const route_ttable_entry_t* src_ttable)
360 {
361 route_t *data;
362 unsigned int src_channel, dst_channel;
363 const route_ttable_entry_t *sptr;
364 ttable_dst_t *dptr;
365 if (src_ttable == NULL)
366 return 0;
367 data = (route_t *)plugin->extra_data;
368 dptr = data->ttable;
369 sptr = src_ttable;
370 plugin->private_free = route_free;
371 for (dst_channel = 0; dst_channel < plugin->dst_format.channels; ++dst_channel) {
372 route_ttable_entry_t t = 0;
373 int att = 0;
374 int nsrcs = 0;
375 ttable_src_t srcs[plugin->src_format.channels];
376 for (src_channel = 0; src_channel < plugin->src_format.channels; ++src_channel) {
377 snd_assert(*sptr >= 0 || *sptr <= FULL, return -ENXIO);
378 if (*sptr != 0) {
379 srcs[nsrcs].channel = src_channel;
380 srcs[nsrcs].as_int = *sptr;
381 if (*sptr != FULL)
382 att = 1;
383 t += *sptr;
384 nsrcs++;
385 }
386 sptr++;
387 }
388 dptr->att = att;
389 dptr->nsrcs = nsrcs;
390 if (nsrcs == 0)
391 dptr->func = route_to_channel_from_zero;
392 else if (nsrcs == 1 && !att)
393 dptr->func = route_to_channel_from_one;
394 else
395 dptr->func = route_to_channel;
396 if (nsrcs > 0) {
397 int srcidx;
398 dptr->srcs = kcalloc(nsrcs, sizeof(*srcs), GFP_KERNEL);
399 for(srcidx = 0; srcidx < nsrcs; srcidx++)
400 dptr->srcs[srcidx] = srcs[srcidx];
401 } else
402 dptr->srcs = NULL;
403 dptr++;
404 }
405 return 0;
406 }
407
408 static snd_pcm_sframes_t route_transfer(snd_pcm_plugin_t *plugin,
409 const snd_pcm_plugin_channel_t *src_channels,
410 snd_pcm_plugin_channel_t *dst_channels,
411 snd_pcm_uframes_t frames)
412 {
413 route_t *data;
414 int src_nchannels, dst_nchannels;
415 int dst_channel;
416 ttable_dst_t *ttp;
417 snd_pcm_plugin_channel_t *dvp;
418
419 snd_assert(plugin != NULL && src_channels != NULL && dst_channels != NULL, return -ENXIO);
420 if (frames == 0)
421 return 0;
422 data = (route_t *)plugin->extra_data;
423
424 src_nchannels = plugin->src_format.channels;
425 dst_nchannels = plugin->dst_format.channels;
426
427 #ifdef CONFIG_SND_DEBUG
428 {
429 int src_channel;
430 for (src_channel = 0; src_channel < src_nchannels; ++src_channel) {
431 snd_assert(src_channels[src_channel].area.first % 8 == 0 ||
432 src_channels[src_channel].area.step % 8 == 0,
433 return -ENXIO);
434 }
435 for (dst_channel = 0; dst_channel < dst_nchannels; ++dst_channel) {
436 snd_assert(dst_channels[dst_channel].area.first % 8 == 0 ||
437 dst_channels[dst_channel].area.step % 8 == 0,
438 return -ENXIO);
439 }
440 }
441 #endif
442
443 ttp = data->ttable;
444 dvp = dst_channels;
445 for (dst_channel = 0; dst_channel < dst_nchannels; ++dst_channel) {
446 ttp->func(plugin, src_channels, dvp, ttp, frames);
447 dvp++;
448 ttp++;
449 }
450 return frames;
451 }
452
453 int getput_index(int format)
454 {
455 int sign, width, endian;
456 sign = !snd_pcm_format_signed(format);
457 width = snd_pcm_format_width(format) / 8 - 1;
458 if (width < 0 || width > 3) {
459 snd_printk(KERN_ERR "snd-pcm-oss: invalid format %d\n", format);
460 width = 0;
461 }
462 #ifdef SNDRV_LITTLE_ENDIAN
463 endian = snd_pcm_format_big_endian(format);
464 #else
465 endian = snd_pcm_format_little_endian(format);
466 #endif
467 if (endian < 0)
468 endian = 0;
469 return width * 4 + endian * 2 + sign;
470 }
471
472 int snd_pcm_plugin_build_route(snd_pcm_plug_t *plug,
473 snd_pcm_plugin_format_t *src_format,
474 snd_pcm_plugin_format_t *dst_format,
475 route_ttable_entry_t *ttable,
476 snd_pcm_plugin_t **r_plugin)
477 {
478 route_t *data;
479 snd_pcm_plugin_t *plugin;
480 int err;
481
482 snd_assert(r_plugin != NULL, return -ENXIO);
483 *r_plugin = NULL;
484 snd_assert(src_format->rate == dst_format->rate, return -ENXIO);
485 snd_assert(snd_pcm_format_linear(src_format->format) != 0 &&
486 snd_pcm_format_linear(dst_format->format) != 0,
487 return -ENXIO);
488
489 err = snd_pcm_plugin_build(plug, "attenuated route conversion",
490 src_format, dst_format,
491 sizeof(route_t) + sizeof(data->ttable[0]) * dst_format->channels,
492 &plugin);
493 if (err < 0)
494 return err;
495
496 data = (route_t *) plugin->extra_data;
497
498 data->get = getput_index(src_format->format);
499 snd_assert(data->get >= 0 && data->get < 4*2*2, return -EINVAL);
500 data->put = getput_index(dst_format->format);
501 snd_assert(data->get >= 0 && data->get < 4*2*2, return -EINVAL);
502 data->conv = conv_index(src_format->format, dst_format->format);
503
504 if (snd_pcm_format_width(src_format->format) == 32)
505 data->sum_type = R_UINT64;
506 else
507 data->sum_type = R_UINT32;
508 data->src_sample_size = snd_pcm_format_width(src_format->format) / 8;
509
510 if ((err = route_load_ttable(plugin, ttable)) < 0) {
511 snd_pcm_plugin_free(plugin);
512 return err;
513 }
514 plugin->transfer = route_transfer;
515 plugin->src_channels_mask = route_src_channels_mask;
516 plugin->dst_channels_mask = route_dst_channels_mask;
517 *r_plugin = plugin;
518 return 0;
519 }
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