| 1 | /* |
| 2 | * PCM Plug-In shared (kernel/library) code |
| 3 | * Copyright (c) 1999 by Jaroslav Kysela <perex@suse.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 <sound/driver.h> |
| 28 | |
| 29 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
| 30 | |
| 31 | #include <linux/slab.h> |
| 32 | #include <linux/time.h> |
| 33 | #include <linux/vmalloc.h> |
| 34 | #include <sound/core.h> |
| 35 | #include <sound/pcm.h> |
| 36 | #include <sound/pcm_params.h> |
| 37 | #include "pcm_plugin.h" |
| 38 | |
| 39 | #define snd_pcm_plug_first(plug) ((plug)->runtime->oss.plugin_first) |
| 40 | #define snd_pcm_plug_last(plug) ((plug)->runtime->oss.plugin_last) |
| 41 | |
| 42 | static int snd_pcm_plugin_src_channels_mask(struct snd_pcm_plugin *plugin, |
| 43 | unsigned long *dst_vmask, |
| 44 | unsigned long **src_vmask) |
| 45 | { |
| 46 | unsigned long *vmask = plugin->src_vmask; |
| 47 | bitmap_copy(vmask, dst_vmask, plugin->src_format.channels); |
| 48 | *src_vmask = vmask; |
| 49 | return 0; |
| 50 | } |
| 51 | |
| 52 | static int snd_pcm_plugin_dst_channels_mask(struct snd_pcm_plugin *plugin, |
| 53 | unsigned long *src_vmask, |
| 54 | unsigned long **dst_vmask) |
| 55 | { |
| 56 | unsigned long *vmask = plugin->dst_vmask; |
| 57 | bitmap_copy(vmask, src_vmask, plugin->dst_format.channels); |
| 58 | *dst_vmask = vmask; |
| 59 | return 0; |
| 60 | } |
| 61 | |
| 62 | /* |
| 63 | * because some cards might have rates "very close", we ignore |
| 64 | * all "resampling" requests within +-5% |
| 65 | */ |
| 66 | static int rate_match(unsigned int src_rate, unsigned int dst_rate) |
| 67 | { |
| 68 | unsigned int low = (src_rate * 95) / 100; |
| 69 | unsigned int high = (src_rate * 105) / 100; |
| 70 | return dst_rate >= low && dst_rate <= high; |
| 71 | } |
| 72 | |
| 73 | static int snd_pcm_plugin_alloc(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t frames) |
| 74 | { |
| 75 | struct snd_pcm_plugin_format *format; |
| 76 | ssize_t width; |
| 77 | size_t size; |
| 78 | unsigned int channel; |
| 79 | struct snd_pcm_plugin_channel *c; |
| 80 | |
| 81 | if (plugin->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 82 | format = &plugin->src_format; |
| 83 | } else { |
| 84 | format = &plugin->dst_format; |
| 85 | } |
| 86 | if ((width = snd_pcm_format_physical_width(format->format)) < 0) |
| 87 | return width; |
| 88 | size = frames * format->channels * width; |
| 89 | snd_assert((size % 8) == 0, return -ENXIO); |
| 90 | size /= 8; |
| 91 | if (plugin->buf_frames < frames) { |
| 92 | vfree(plugin->buf); |
| 93 | plugin->buf = vmalloc(size); |
| 94 | plugin->buf_frames = frames; |
| 95 | } |
| 96 | if (!plugin->buf) { |
| 97 | plugin->buf_frames = 0; |
| 98 | return -ENOMEM; |
| 99 | } |
| 100 | c = plugin->buf_channels; |
| 101 | if (plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) { |
| 102 | for (channel = 0; channel < format->channels; channel++, c++) { |
| 103 | c->frames = frames; |
| 104 | c->enabled = 1; |
| 105 | c->wanted = 0; |
| 106 | c->area.addr = plugin->buf; |
| 107 | c->area.first = channel * width; |
| 108 | c->area.step = format->channels * width; |
| 109 | } |
| 110 | } else if (plugin->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) { |
| 111 | snd_assert((size % format->channels) == 0,); |
| 112 | size /= format->channels; |
| 113 | for (channel = 0; channel < format->channels; channel++, c++) { |
| 114 | c->frames = frames; |
| 115 | c->enabled = 1; |
| 116 | c->wanted = 0; |
| 117 | c->area.addr = plugin->buf + (channel * size); |
| 118 | c->area.first = 0; |
| 119 | c->area.step = width; |
| 120 | } |
| 121 | } else |
| 122 | return -EINVAL; |
| 123 | return 0; |
| 124 | } |
| 125 | |
| 126 | int snd_pcm_plug_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t frames) |
| 127 | { |
| 128 | int err; |
| 129 | snd_assert(snd_pcm_plug_first(plug) != NULL, return -ENXIO); |
| 130 | if (snd_pcm_plug_stream(plug) == SNDRV_PCM_STREAM_PLAYBACK) { |
| 131 | struct snd_pcm_plugin *plugin = snd_pcm_plug_first(plug); |
| 132 | while (plugin->next) { |
| 133 | if (plugin->dst_frames) |
| 134 | frames = plugin->dst_frames(plugin, frames); |
| 135 | snd_assert(frames > 0, return -ENXIO); |
| 136 | plugin = plugin->next; |
| 137 | err = snd_pcm_plugin_alloc(plugin, frames); |
| 138 | if (err < 0) |
| 139 | return err; |
| 140 | } |
| 141 | } else { |
| 142 | struct snd_pcm_plugin *plugin = snd_pcm_plug_last(plug); |
| 143 | while (plugin->prev) { |
| 144 | if (plugin->src_frames) |
| 145 | frames = plugin->src_frames(plugin, frames); |
| 146 | snd_assert(frames > 0, return -ENXIO); |
| 147 | plugin = plugin->prev; |
| 148 | err = snd_pcm_plugin_alloc(plugin, frames); |
| 149 | if (err < 0) |
| 150 | return err; |
| 151 | } |
| 152 | } |
| 153 | return 0; |
| 154 | } |
| 155 | |
| 156 | |
| 157 | snd_pcm_sframes_t snd_pcm_plugin_client_channels(struct snd_pcm_plugin *plugin, |
| 158 | snd_pcm_uframes_t frames, |
| 159 | struct snd_pcm_plugin_channel **channels) |
| 160 | { |
| 161 | *channels = plugin->buf_channels; |
| 162 | return frames; |
| 163 | } |
| 164 | |
| 165 | int snd_pcm_plugin_build(struct snd_pcm_substream *plug, |
| 166 | const char *name, |
| 167 | struct snd_pcm_plugin_format *src_format, |
| 168 | struct snd_pcm_plugin_format *dst_format, |
| 169 | size_t extra, |
| 170 | struct snd_pcm_plugin **ret) |
| 171 | { |
| 172 | struct snd_pcm_plugin *plugin; |
| 173 | unsigned int channels; |
| 174 | |
| 175 | snd_assert(plug != NULL, return -ENXIO); |
| 176 | snd_assert(src_format != NULL && dst_format != NULL, return -ENXIO); |
| 177 | plugin = kzalloc(sizeof(*plugin) + extra, GFP_KERNEL); |
| 178 | if (plugin == NULL) |
| 179 | return -ENOMEM; |
| 180 | plugin->name = name; |
| 181 | plugin->plug = plug; |
| 182 | plugin->stream = snd_pcm_plug_stream(plug); |
| 183 | plugin->access = SNDRV_PCM_ACCESS_RW_INTERLEAVED; |
| 184 | plugin->src_format = *src_format; |
| 185 | plugin->src_width = snd_pcm_format_physical_width(src_format->format); |
| 186 | snd_assert(plugin->src_width > 0, ); |
| 187 | plugin->dst_format = *dst_format; |
| 188 | plugin->dst_width = snd_pcm_format_physical_width(dst_format->format); |
| 189 | snd_assert(plugin->dst_width > 0, ); |
| 190 | if (plugin->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 191 | channels = src_format->channels; |
| 192 | else |
| 193 | channels = dst_format->channels; |
| 194 | plugin->buf_channels = kcalloc(channels, sizeof(*plugin->buf_channels), GFP_KERNEL); |
| 195 | if (plugin->buf_channels == NULL) { |
| 196 | snd_pcm_plugin_free(plugin); |
| 197 | return -ENOMEM; |
| 198 | } |
| 199 | plugin->src_vmask = bitmap_alloc(src_format->channels); |
| 200 | if (plugin->src_vmask == NULL) { |
| 201 | snd_pcm_plugin_free(plugin); |
| 202 | return -ENOMEM; |
| 203 | } |
| 204 | plugin->dst_vmask = bitmap_alloc(dst_format->channels); |
| 205 | if (plugin->dst_vmask == NULL) { |
| 206 | snd_pcm_plugin_free(plugin); |
| 207 | return -ENOMEM; |
| 208 | } |
| 209 | plugin->client_channels = snd_pcm_plugin_client_channels; |
| 210 | plugin->src_channels_mask = snd_pcm_plugin_src_channels_mask; |
| 211 | plugin->dst_channels_mask = snd_pcm_plugin_dst_channels_mask; |
| 212 | *ret = plugin; |
| 213 | return 0; |
| 214 | } |
| 215 | |
| 216 | int snd_pcm_plugin_free(struct snd_pcm_plugin *plugin) |
| 217 | { |
| 218 | if (! plugin) |
| 219 | return 0; |
| 220 | if (plugin->private_free) |
| 221 | plugin->private_free(plugin); |
| 222 | kfree(plugin->buf_channels); |
| 223 | vfree(plugin->buf); |
| 224 | kfree(plugin->src_vmask); |
| 225 | kfree(plugin->dst_vmask); |
| 226 | kfree(plugin); |
| 227 | return 0; |
| 228 | } |
| 229 | |
| 230 | snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *plug, snd_pcm_uframes_t drv_frames) |
| 231 | { |
| 232 | struct snd_pcm_plugin *plugin, *plugin_prev, *plugin_next; |
| 233 | int stream = snd_pcm_plug_stream(plug); |
| 234 | |
| 235 | snd_assert(plug != NULL, return -ENXIO); |
| 236 | if (drv_frames == 0) |
| 237 | return 0; |
| 238 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 239 | plugin = snd_pcm_plug_last(plug); |
| 240 | while (plugin && drv_frames > 0) { |
| 241 | plugin_prev = plugin->prev; |
| 242 | if (plugin->src_frames) |
| 243 | drv_frames = plugin->src_frames(plugin, drv_frames); |
| 244 | plugin = plugin_prev; |
| 245 | } |
| 246 | } else if (stream == SNDRV_PCM_STREAM_CAPTURE) { |
| 247 | plugin = snd_pcm_plug_first(plug); |
| 248 | while (plugin && drv_frames > 0) { |
| 249 | plugin_next = plugin->next; |
| 250 | if (plugin->dst_frames) |
| 251 | drv_frames = plugin->dst_frames(plugin, drv_frames); |
| 252 | plugin = plugin_next; |
| 253 | } |
| 254 | } else |
| 255 | snd_BUG(); |
| 256 | return drv_frames; |
| 257 | } |
| 258 | |
| 259 | snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *plug, snd_pcm_uframes_t clt_frames) |
| 260 | { |
| 261 | struct snd_pcm_plugin *plugin, *plugin_prev, *plugin_next; |
| 262 | snd_pcm_sframes_t frames; |
| 263 | int stream = snd_pcm_plug_stream(plug); |
| 264 | |
| 265 | snd_assert(plug != NULL, return -ENXIO); |
| 266 | if (clt_frames == 0) |
| 267 | return 0; |
| 268 | frames = clt_frames; |
| 269 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 270 | plugin = snd_pcm_plug_first(plug); |
| 271 | while (plugin && frames > 0) { |
| 272 | plugin_next = plugin->next; |
| 273 | if (plugin->dst_frames) { |
| 274 | frames = plugin->dst_frames(plugin, frames); |
| 275 | if (frames < 0) |
| 276 | return frames; |
| 277 | } |
| 278 | plugin = plugin_next; |
| 279 | } |
| 280 | } else if (stream == SNDRV_PCM_STREAM_CAPTURE) { |
| 281 | plugin = snd_pcm_plug_last(plug); |
| 282 | while (plugin) { |
| 283 | plugin_prev = plugin->prev; |
| 284 | if (plugin->src_frames) { |
| 285 | frames = plugin->src_frames(plugin, frames); |
| 286 | if (frames < 0) |
| 287 | return frames; |
| 288 | } |
| 289 | plugin = plugin_prev; |
| 290 | } |
| 291 | } else |
| 292 | snd_BUG(); |
| 293 | return frames; |
| 294 | } |
| 295 | |
| 296 | static int snd_pcm_plug_formats(struct snd_mask *mask, int format) |
| 297 | { |
| 298 | struct snd_mask formats = *mask; |
| 299 | u64 linfmts = (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S8 | |
| 300 | SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_S16_LE | |
| 301 | SNDRV_PCM_FMTBIT_U16_BE | SNDRV_PCM_FMTBIT_S16_BE | |
| 302 | SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_S24_LE | |
| 303 | SNDRV_PCM_FMTBIT_U24_BE | SNDRV_PCM_FMTBIT_S24_BE | |
| 304 | SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_S32_LE | |
| 305 | SNDRV_PCM_FMTBIT_U32_BE | SNDRV_PCM_FMTBIT_S32_BE); |
| 306 | snd_mask_set(&formats, SNDRV_PCM_FORMAT_MU_LAW); |
| 307 | |
| 308 | if (formats.bits[0] & (u32)linfmts) |
| 309 | formats.bits[0] |= (u32)linfmts; |
| 310 | if (formats.bits[1] & (u32)(linfmts >> 32)) |
| 311 | formats.bits[1] |= (u32)(linfmts >> 32); |
| 312 | return snd_mask_test(&formats, format); |
| 313 | } |
| 314 | |
| 315 | static int preferred_formats[] = { |
| 316 | SNDRV_PCM_FORMAT_S16_LE, |
| 317 | SNDRV_PCM_FORMAT_S16_BE, |
| 318 | SNDRV_PCM_FORMAT_U16_LE, |
| 319 | SNDRV_PCM_FORMAT_U16_BE, |
| 320 | SNDRV_PCM_FORMAT_S24_LE, |
| 321 | SNDRV_PCM_FORMAT_S24_BE, |
| 322 | SNDRV_PCM_FORMAT_U24_LE, |
| 323 | SNDRV_PCM_FORMAT_U24_BE, |
| 324 | SNDRV_PCM_FORMAT_S32_LE, |
| 325 | SNDRV_PCM_FORMAT_S32_BE, |
| 326 | SNDRV_PCM_FORMAT_U32_LE, |
| 327 | SNDRV_PCM_FORMAT_U32_BE, |
| 328 | SNDRV_PCM_FORMAT_S8, |
| 329 | SNDRV_PCM_FORMAT_U8 |
| 330 | }; |
| 331 | |
| 332 | int snd_pcm_plug_slave_format(int format, struct snd_mask *format_mask) |
| 333 | { |
| 334 | if (snd_mask_test(format_mask, format)) |
| 335 | return format; |
| 336 | if (! snd_pcm_plug_formats(format_mask, format)) |
| 337 | return -EINVAL; |
| 338 | if (snd_pcm_format_linear(format)) { |
| 339 | int width = snd_pcm_format_width(format); |
| 340 | int unsignd = snd_pcm_format_unsigned(format); |
| 341 | int big = snd_pcm_format_big_endian(format); |
| 342 | int format1; |
| 343 | int wid, width1=width; |
| 344 | int dwidth1 = 8; |
| 345 | for (wid = 0; wid < 4; ++wid) { |
| 346 | int end, big1 = big; |
| 347 | for (end = 0; end < 2; ++end) { |
| 348 | int sgn, unsignd1 = unsignd; |
| 349 | for (sgn = 0; sgn < 2; ++sgn) { |
| 350 | format1 = snd_pcm_build_linear_format(width1, unsignd1, big1); |
| 351 | if (format1 >= 0 && |
| 352 | snd_mask_test(format_mask, format1)) |
| 353 | goto _found; |
| 354 | unsignd1 = !unsignd1; |
| 355 | } |
| 356 | big1 = !big1; |
| 357 | } |
| 358 | if (width1 == 32) { |
| 359 | dwidth1 = -dwidth1; |
| 360 | width1 = width; |
| 361 | } |
| 362 | width1 += dwidth1; |
| 363 | } |
| 364 | return -EINVAL; |
| 365 | _found: |
| 366 | return format1; |
| 367 | } else { |
| 368 | unsigned int i; |
| 369 | switch (format) { |
| 370 | case SNDRV_PCM_FORMAT_MU_LAW: |
| 371 | for (i = 0; i < ARRAY_SIZE(preferred_formats); ++i) { |
| 372 | int format1 = preferred_formats[i]; |
| 373 | if (snd_mask_test(format_mask, format1)) |
| 374 | return format1; |
| 375 | } |
| 376 | default: |
| 377 | return -EINVAL; |
| 378 | } |
| 379 | } |
| 380 | } |
| 381 | |
| 382 | int snd_pcm_plug_format_plugins(struct snd_pcm_substream *plug, |
| 383 | struct snd_pcm_hw_params *params, |
| 384 | struct snd_pcm_hw_params *slave_params) |
| 385 | { |
| 386 | struct snd_pcm_plugin_format tmpformat; |
| 387 | struct snd_pcm_plugin_format dstformat; |
| 388 | struct snd_pcm_plugin_format srcformat; |
| 389 | int src_access, dst_access; |
| 390 | struct snd_pcm_plugin *plugin = NULL; |
| 391 | int err; |
| 392 | int stream = snd_pcm_plug_stream(plug); |
| 393 | int slave_interleaved = (params_channels(slave_params) == 1 || |
| 394 | params_access(slave_params) == SNDRV_PCM_ACCESS_RW_INTERLEAVED); |
| 395 | |
| 396 | switch (stream) { |
| 397 | case SNDRV_PCM_STREAM_PLAYBACK: |
| 398 | dstformat.format = params_format(slave_params); |
| 399 | dstformat.rate = params_rate(slave_params); |
| 400 | dstformat.channels = params_channels(slave_params); |
| 401 | srcformat.format = params_format(params); |
| 402 | srcformat.rate = params_rate(params); |
| 403 | srcformat.channels = params_channels(params); |
| 404 | src_access = SNDRV_PCM_ACCESS_RW_INTERLEAVED; |
| 405 | dst_access = (slave_interleaved ? SNDRV_PCM_ACCESS_RW_INTERLEAVED : |
| 406 | SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); |
| 407 | break; |
| 408 | case SNDRV_PCM_STREAM_CAPTURE: |
| 409 | dstformat.format = params_format(params); |
| 410 | dstformat.rate = params_rate(params); |
| 411 | dstformat.channels = params_channels(params); |
| 412 | srcformat.format = params_format(slave_params); |
| 413 | srcformat.rate = params_rate(slave_params); |
| 414 | srcformat.channels = params_channels(slave_params); |
| 415 | src_access = (slave_interleaved ? SNDRV_PCM_ACCESS_RW_INTERLEAVED : |
| 416 | SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); |
| 417 | dst_access = SNDRV_PCM_ACCESS_RW_INTERLEAVED; |
| 418 | break; |
| 419 | default: |
| 420 | snd_BUG(); |
| 421 | return -EINVAL; |
| 422 | } |
| 423 | tmpformat = srcformat; |
| 424 | |
| 425 | pdprintf("srcformat: format=%i, rate=%i, channels=%i\n", |
| 426 | srcformat.format, |
| 427 | srcformat.rate, |
| 428 | srcformat.channels); |
| 429 | pdprintf("dstformat: format=%i, rate=%i, channels=%i\n", |
| 430 | dstformat.format, |
| 431 | dstformat.rate, |
| 432 | dstformat.channels); |
| 433 | |
| 434 | /* Format change (linearization) */ |
| 435 | if ((srcformat.format != dstformat.format || |
| 436 | !rate_match(srcformat.rate, dstformat.rate) || |
| 437 | srcformat.channels != dstformat.channels) && |
| 438 | !snd_pcm_format_linear(srcformat.format)) { |
| 439 | if (snd_pcm_format_linear(dstformat.format)) |
| 440 | tmpformat.format = dstformat.format; |
| 441 | else |
| 442 | tmpformat.format = SNDRV_PCM_FORMAT_S16; |
| 443 | switch (srcformat.format) { |
| 444 | case SNDRV_PCM_FORMAT_MU_LAW: |
| 445 | err = snd_pcm_plugin_build_mulaw(plug, |
| 446 | &srcformat, &tmpformat, |
| 447 | &plugin); |
| 448 | break; |
| 449 | default: |
| 450 | return -EINVAL; |
| 451 | } |
| 452 | pdprintf("format change: src=%i, dst=%i returns %i\n", srcformat.format, tmpformat.format, err); |
| 453 | if (err < 0) |
| 454 | return err; |
| 455 | err = snd_pcm_plugin_append(plugin); |
| 456 | if (err < 0) { |
| 457 | snd_pcm_plugin_free(plugin); |
| 458 | return err; |
| 459 | } |
| 460 | srcformat = tmpformat; |
| 461 | src_access = dst_access; |
| 462 | } |
| 463 | |
| 464 | /* channels reduction */ |
| 465 | if (srcformat.channels > dstformat.channels) { |
| 466 | int sv = srcformat.channels; |
| 467 | int dv = dstformat.channels; |
| 468 | int *ttable = kcalloc(dv * sv, sizeof(*ttable), GFP_KERNEL); |
| 469 | if (ttable == NULL) |
| 470 | return -ENOMEM; |
| 471 | #if 1 |
| 472 | if (sv == 2 && dv == 1) { |
| 473 | ttable[0] = HALF; |
| 474 | ttable[1] = HALF; |
| 475 | } else |
| 476 | #endif |
| 477 | { |
| 478 | int v; |
| 479 | for (v = 0; v < dv; ++v) |
| 480 | ttable[v * sv + v] = FULL; |
| 481 | } |
| 482 | tmpformat.channels = dstformat.channels; |
| 483 | if (rate_match(srcformat.rate, dstformat.rate) && |
| 484 | snd_pcm_format_linear(dstformat.format)) |
| 485 | tmpformat.format = dstformat.format; |
| 486 | err = snd_pcm_plugin_build_route(plug, |
| 487 | &srcformat, &tmpformat, |
| 488 | ttable, &plugin); |
| 489 | kfree(ttable); |
| 490 | pdprintf("channels reduction: src=%i, dst=%i returns %i\n", srcformat.channels, tmpformat.channels, err); |
| 491 | if (err < 0) { |
| 492 | snd_pcm_plugin_free(plugin); |
| 493 | return err; |
| 494 | } |
| 495 | err = snd_pcm_plugin_append(plugin); |
| 496 | if (err < 0) { |
| 497 | snd_pcm_plugin_free(plugin); |
| 498 | return err; |
| 499 | } |
| 500 | srcformat = tmpformat; |
| 501 | src_access = dst_access; |
| 502 | } |
| 503 | |
| 504 | /* rate resampling */ |
| 505 | if (!rate_match(srcformat.rate, dstformat.rate)) { |
| 506 | tmpformat.rate = dstformat.rate; |
| 507 | if (srcformat.channels == dstformat.channels && |
| 508 | snd_pcm_format_linear(dstformat.format)) |
| 509 | tmpformat.format = dstformat.format; |
| 510 | err = snd_pcm_plugin_build_rate(plug, |
| 511 | &srcformat, &tmpformat, |
| 512 | &plugin); |
| 513 | pdprintf("rate down resampling: src=%i, dst=%i returns %i\n", srcformat.rate, tmpformat.rate, err); |
| 514 | if (err < 0) { |
| 515 | snd_pcm_plugin_free(plugin); |
| 516 | return err; |
| 517 | } |
| 518 | err = snd_pcm_plugin_append(plugin); |
| 519 | if (err < 0) { |
| 520 | snd_pcm_plugin_free(plugin); |
| 521 | return err; |
| 522 | } |
| 523 | srcformat = tmpformat; |
| 524 | src_access = dst_access; |
| 525 | } |
| 526 | |
| 527 | /* channels extension */ |
| 528 | if (srcformat.channels < dstformat.channels) { |
| 529 | int sv = srcformat.channels; |
| 530 | int dv = dstformat.channels; |
| 531 | int *ttable = kcalloc(dv * sv, sizeof(*ttable), GFP_KERNEL); |
| 532 | if (ttable == NULL) |
| 533 | return -ENOMEM; |
| 534 | #if 0 |
| 535 | { |
| 536 | int v; |
| 537 | for (v = 0; v < sv; ++v) |
| 538 | ttable[v * sv + v] = FULL; |
| 539 | } |
| 540 | #else |
| 541 | { |
| 542 | /* Playback is spreaded on all channels */ |
| 543 | int vd, vs; |
| 544 | for (vd = 0, vs = 0; vd < dv; ++vd) { |
| 545 | ttable[vd * sv + vs] = FULL; |
| 546 | vs++; |
| 547 | if (vs == sv) |
| 548 | vs = 0; |
| 549 | } |
| 550 | } |
| 551 | #endif |
| 552 | tmpformat.channels = dstformat.channels; |
| 553 | if (snd_pcm_format_linear(dstformat.format)) |
| 554 | tmpformat.format = dstformat.format; |
| 555 | err = snd_pcm_plugin_build_route(plug, |
| 556 | &srcformat, &tmpformat, |
| 557 | ttable, &plugin); |
| 558 | kfree(ttable); |
| 559 | pdprintf("channels extension: src=%i, dst=%i returns %i\n", srcformat.channels, tmpformat.channels, err); |
| 560 | if (err < 0) { |
| 561 | snd_pcm_plugin_free(plugin); |
| 562 | return err; |
| 563 | } |
| 564 | err = snd_pcm_plugin_append(plugin); |
| 565 | if (err < 0) { |
| 566 | snd_pcm_plugin_free(plugin); |
| 567 | return err; |
| 568 | } |
| 569 | srcformat = tmpformat; |
| 570 | src_access = dst_access; |
| 571 | } |
| 572 | |
| 573 | /* format change */ |
| 574 | if (srcformat.format != dstformat.format) { |
| 575 | tmpformat.format = dstformat.format; |
| 576 | if (tmpformat.format == SNDRV_PCM_FORMAT_MU_LAW) { |
| 577 | err = snd_pcm_plugin_build_mulaw(plug, |
| 578 | &srcformat, &tmpformat, |
| 579 | &plugin); |
| 580 | } |
| 581 | else if (snd_pcm_format_linear(srcformat.format) && |
| 582 | snd_pcm_format_linear(tmpformat.format)) { |
| 583 | err = snd_pcm_plugin_build_linear(plug, |
| 584 | &srcformat, &tmpformat, |
| 585 | &plugin); |
| 586 | } |
| 587 | else |
| 588 | return -EINVAL; |
| 589 | pdprintf("format change: src=%i, dst=%i returns %i\n", srcformat.format, tmpformat.format, err); |
| 590 | if (err < 0) |
| 591 | return err; |
| 592 | err = snd_pcm_plugin_append(plugin); |
| 593 | if (err < 0) { |
| 594 | snd_pcm_plugin_free(plugin); |
| 595 | return err; |
| 596 | } |
| 597 | srcformat = tmpformat; |
| 598 | src_access = dst_access; |
| 599 | } |
| 600 | |
| 601 | /* de-interleave */ |
| 602 | if (src_access != dst_access) { |
| 603 | err = snd_pcm_plugin_build_copy(plug, |
| 604 | &srcformat, |
| 605 | &tmpformat, |
| 606 | &plugin); |
| 607 | pdprintf("interleave change (copy: returns %i)\n", err); |
| 608 | if (err < 0) |
| 609 | return err; |
| 610 | err = snd_pcm_plugin_append(plugin); |
| 611 | if (err < 0) { |
| 612 | snd_pcm_plugin_free(plugin); |
| 613 | return err; |
| 614 | } |
| 615 | } |
| 616 | |
| 617 | return 0; |
| 618 | } |
| 619 | |
| 620 | snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(struct snd_pcm_substream *plug, |
| 621 | char *buf, |
| 622 | snd_pcm_uframes_t count, |
| 623 | struct snd_pcm_plugin_channel **channels) |
| 624 | { |
| 625 | struct snd_pcm_plugin *plugin; |
| 626 | struct snd_pcm_plugin_channel *v; |
| 627 | struct snd_pcm_plugin_format *format; |
| 628 | int width, nchannels, channel; |
| 629 | int stream = snd_pcm_plug_stream(plug); |
| 630 | |
| 631 | snd_assert(buf != NULL, return -ENXIO); |
| 632 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 633 | plugin = snd_pcm_plug_first(plug); |
| 634 | format = &plugin->src_format; |
| 635 | } else { |
| 636 | plugin = snd_pcm_plug_last(plug); |
| 637 | format = &plugin->dst_format; |
| 638 | } |
| 639 | v = plugin->buf_channels; |
| 640 | *channels = v; |
| 641 | if ((width = snd_pcm_format_physical_width(format->format)) < 0) |
| 642 | return width; |
| 643 | nchannels = format->channels; |
| 644 | snd_assert(plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || format->channels <= 1, return -ENXIO); |
| 645 | for (channel = 0; channel < nchannels; channel++, v++) { |
| 646 | v->frames = count; |
| 647 | v->enabled = 1; |
| 648 | v->wanted = (stream == SNDRV_PCM_STREAM_CAPTURE); |
| 649 | v->area.addr = buf; |
| 650 | v->area.first = channel * width; |
| 651 | v->area.step = nchannels * width; |
| 652 | } |
| 653 | return count; |
| 654 | } |
| 655 | |
| 656 | static int snd_pcm_plug_playback_channels_mask(struct snd_pcm_substream *plug, |
| 657 | unsigned long *client_vmask) |
| 658 | { |
| 659 | struct snd_pcm_plugin *plugin = snd_pcm_plug_last(plug); |
| 660 | if (plugin == NULL) { |
| 661 | return 0; |
| 662 | } else { |
| 663 | int schannels = plugin->dst_format.channels; |
| 664 | DECLARE_BITMAP(bs, schannels); |
| 665 | unsigned long *srcmask; |
| 666 | unsigned long *dstmask = bs; |
| 667 | int err; |
| 668 | bitmap_fill(dstmask, schannels); |
| 669 | |
| 670 | while (1) { |
| 671 | err = plugin->src_channels_mask(plugin, dstmask, &srcmask); |
| 672 | if (err < 0) |
| 673 | return err; |
| 674 | dstmask = srcmask; |
| 675 | if (plugin->prev == NULL) |
| 676 | break; |
| 677 | plugin = plugin->prev; |
| 678 | } |
| 679 | bitmap_and(client_vmask, client_vmask, dstmask, plugin->src_format.channels); |
| 680 | return 0; |
| 681 | } |
| 682 | } |
| 683 | |
| 684 | static int snd_pcm_plug_playback_disable_useless_channels(struct snd_pcm_substream *plug, |
| 685 | struct snd_pcm_plugin_channel *src_channels) |
| 686 | { |
| 687 | struct snd_pcm_plugin *plugin = snd_pcm_plug_first(plug); |
| 688 | unsigned int nchannels = plugin->src_format.channels; |
| 689 | DECLARE_BITMAP(bs, nchannels); |
| 690 | unsigned long *srcmask = bs; |
| 691 | int err; |
| 692 | unsigned int channel; |
| 693 | for (channel = 0; channel < nchannels; channel++) { |
| 694 | if (src_channels[channel].enabled) |
| 695 | set_bit(channel, srcmask); |
| 696 | else |
| 697 | clear_bit(channel, srcmask); |
| 698 | } |
| 699 | err = snd_pcm_plug_playback_channels_mask(plug, srcmask); |
| 700 | if (err < 0) |
| 701 | return err; |
| 702 | for (channel = 0; channel < nchannels; channel++) { |
| 703 | if (!test_bit(channel, srcmask)) |
| 704 | src_channels[channel].enabled = 0; |
| 705 | } |
| 706 | return 0; |
| 707 | } |
| 708 | |
| 709 | static int snd_pcm_plug_capture_disable_useless_channels(struct snd_pcm_substream *plug, |
| 710 | struct snd_pcm_plugin_channel *src_channels, |
| 711 | struct snd_pcm_plugin_channel *client_channels) |
| 712 | { |
| 713 | struct snd_pcm_plugin *plugin = snd_pcm_plug_last(plug); |
| 714 | unsigned int nchannels = plugin->dst_format.channels; |
| 715 | DECLARE_BITMAP(bs, nchannels); |
| 716 | unsigned long *dstmask = bs; |
| 717 | unsigned long *srcmask; |
| 718 | int err; |
| 719 | unsigned int channel; |
| 720 | for (channel = 0; channel < nchannels; channel++) { |
| 721 | if (client_channels[channel].enabled) |
| 722 | set_bit(channel, dstmask); |
| 723 | else |
| 724 | clear_bit(channel, dstmask); |
| 725 | } |
| 726 | while (plugin) { |
| 727 | err = plugin->src_channels_mask(plugin, dstmask, &srcmask); |
| 728 | if (err < 0) |
| 729 | return err; |
| 730 | dstmask = srcmask; |
| 731 | plugin = plugin->prev; |
| 732 | } |
| 733 | plugin = snd_pcm_plug_first(plug); |
| 734 | nchannels = plugin->src_format.channels; |
| 735 | for (channel = 0; channel < nchannels; channel++) { |
| 736 | if (!test_bit(channel, dstmask)) |
| 737 | src_channels[channel].enabled = 0; |
| 738 | } |
| 739 | return 0; |
| 740 | } |
| 741 | |
| 742 | 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) |
| 743 | { |
| 744 | struct snd_pcm_plugin *plugin, *next; |
| 745 | struct snd_pcm_plugin_channel *dst_channels; |
| 746 | int err; |
| 747 | snd_pcm_sframes_t frames = size; |
| 748 | |
| 749 | if ((err = snd_pcm_plug_playback_disable_useless_channels(plug, src_channels)) < 0) |
| 750 | return err; |
| 751 | |
| 752 | plugin = snd_pcm_plug_first(plug); |
| 753 | while (plugin && frames > 0) { |
| 754 | if ((next = plugin->next) != NULL) { |
| 755 | snd_pcm_sframes_t frames1 = frames; |
| 756 | if (plugin->dst_frames) |
| 757 | frames1 = plugin->dst_frames(plugin, frames); |
| 758 | if ((err = next->client_channels(next, frames1, &dst_channels)) < 0) { |
| 759 | return err; |
| 760 | } |
| 761 | if (err != frames1) { |
| 762 | frames = err; |
| 763 | if (plugin->src_frames) |
| 764 | frames = plugin->src_frames(plugin, frames1); |
| 765 | } |
| 766 | } else |
| 767 | dst_channels = NULL; |
| 768 | pdprintf("write plugin: %s, %li\n", plugin->name, frames); |
| 769 | if ((frames = plugin->transfer(plugin, src_channels, dst_channels, frames)) < 0) |
| 770 | return frames; |
| 771 | src_channels = dst_channels; |
| 772 | plugin = next; |
| 773 | } |
| 774 | return snd_pcm_plug_client_size(plug, frames); |
| 775 | } |
| 776 | |
| 777 | 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) |
| 778 | { |
| 779 | struct snd_pcm_plugin *plugin, *next; |
| 780 | struct snd_pcm_plugin_channel *src_channels, *dst_channels; |
| 781 | snd_pcm_sframes_t frames = size; |
| 782 | int err; |
| 783 | |
| 784 | frames = snd_pcm_plug_slave_size(plug, frames); |
| 785 | if (frames < 0) |
| 786 | return frames; |
| 787 | |
| 788 | src_channels = NULL; |
| 789 | plugin = snd_pcm_plug_first(plug); |
| 790 | while (plugin && frames > 0) { |
| 791 | if ((next = plugin->next) != NULL) { |
| 792 | if ((err = plugin->client_channels(plugin, frames, &dst_channels)) < 0) { |
| 793 | return err; |
| 794 | } |
| 795 | frames = err; |
| 796 | if (!plugin->prev) { |
| 797 | if ((err = snd_pcm_plug_capture_disable_useless_channels(plug, dst_channels, dst_channels_final)) < 0) |
| 798 | return err; |
| 799 | } |
| 800 | } else { |
| 801 | dst_channels = dst_channels_final; |
| 802 | } |
| 803 | pdprintf("read plugin: %s, %li\n", plugin->name, frames); |
| 804 | if ((frames = plugin->transfer(plugin, src_channels, dst_channels, frames)) < 0) |
| 805 | return frames; |
| 806 | plugin = next; |
| 807 | src_channels = dst_channels; |
| 808 | } |
| 809 | return frames; |
| 810 | } |
| 811 | |
| 812 | int snd_pcm_area_silence(const struct snd_pcm_channel_area *dst_area, size_t dst_offset, |
| 813 | size_t samples, int format) |
| 814 | { |
| 815 | /* FIXME: sub byte resolution and odd dst_offset */ |
| 816 | unsigned char *dst; |
| 817 | unsigned int dst_step; |
| 818 | int width; |
| 819 | const unsigned char *silence; |
| 820 | if (!dst_area->addr) |
| 821 | return 0; |
| 822 | dst = dst_area->addr + (dst_area->first + dst_area->step * dst_offset) / 8; |
| 823 | width = snd_pcm_format_physical_width(format); |
| 824 | if (width <= 0) |
| 825 | return -EINVAL; |
| 826 | if (dst_area->step == (unsigned int) width && width >= 8) |
| 827 | return snd_pcm_format_set_silence(format, dst, samples); |
| 828 | silence = snd_pcm_format_silence_64(format); |
| 829 | if (! silence) |
| 830 | return -EINVAL; |
| 831 | dst_step = dst_area->step / 8; |
| 832 | if (width == 4) { |
| 833 | /* Ima ADPCM */ |
| 834 | int dstbit = dst_area->first % 8; |
| 835 | int dstbit_step = dst_area->step % 8; |
| 836 | while (samples-- > 0) { |
| 837 | if (dstbit) |
| 838 | *dst &= 0xf0; |
| 839 | else |
| 840 | *dst &= 0x0f; |
| 841 | dst += dst_step; |
| 842 | dstbit += dstbit_step; |
| 843 | if (dstbit == 8) { |
| 844 | dst++; |
| 845 | dstbit = 0; |
| 846 | } |
| 847 | } |
| 848 | } else { |
| 849 | width /= 8; |
| 850 | while (samples-- > 0) { |
| 851 | memcpy(dst, silence, width); |
| 852 | dst += dst_step; |
| 853 | } |
| 854 | } |
| 855 | return 0; |
| 856 | } |
| 857 | |
| 858 | int snd_pcm_area_copy(const struct snd_pcm_channel_area *src_area, size_t src_offset, |
| 859 | const struct snd_pcm_channel_area *dst_area, size_t dst_offset, |
| 860 | size_t samples, int format) |
| 861 | { |
| 862 | /* FIXME: sub byte resolution and odd dst_offset */ |
| 863 | char *src, *dst; |
| 864 | int width; |
| 865 | int src_step, dst_step; |
| 866 | src = src_area->addr + (src_area->first + src_area->step * src_offset) / 8; |
| 867 | if (!src_area->addr) |
| 868 | return snd_pcm_area_silence(dst_area, dst_offset, samples, format); |
| 869 | dst = dst_area->addr + (dst_area->first + dst_area->step * dst_offset) / 8; |
| 870 | if (!dst_area->addr) |
| 871 | return 0; |
| 872 | width = snd_pcm_format_physical_width(format); |
| 873 | if (width <= 0) |
| 874 | return -EINVAL; |
| 875 | if (src_area->step == (unsigned int) width && |
| 876 | dst_area->step == (unsigned int) width && width >= 8) { |
| 877 | size_t bytes = samples * width / 8; |
| 878 | memcpy(dst, src, bytes); |
| 879 | return 0; |
| 880 | } |
| 881 | src_step = src_area->step / 8; |
| 882 | dst_step = dst_area->step / 8; |
| 883 | if (width == 4) { |
| 884 | /* Ima ADPCM */ |
| 885 | int srcbit = src_area->first % 8; |
| 886 | int srcbit_step = src_area->step % 8; |
| 887 | int dstbit = dst_area->first % 8; |
| 888 | int dstbit_step = dst_area->step % 8; |
| 889 | while (samples-- > 0) { |
| 890 | unsigned char srcval; |
| 891 | if (srcbit) |
| 892 | srcval = *src & 0x0f; |
| 893 | else |
| 894 | srcval = (*src & 0xf0) >> 4; |
| 895 | if (dstbit) |
| 896 | *dst = (*dst & 0xf0) | srcval; |
| 897 | else |
| 898 | *dst = (*dst & 0x0f) | (srcval << 4); |
| 899 | src += src_step; |
| 900 | srcbit += srcbit_step; |
| 901 | if (srcbit == 8) { |
| 902 | src++; |
| 903 | srcbit = 0; |
| 904 | } |
| 905 | dst += dst_step; |
| 906 | dstbit += dstbit_step; |
| 907 | if (dstbit == 8) { |
| 908 | dst++; |
| 909 | dstbit = 0; |
| 910 | } |
| 911 | } |
| 912 | } else { |
| 913 | width /= 8; |
| 914 | while (samples-- > 0) { |
| 915 | memcpy(dst, src, width); |
| 916 | src += src_step; |
| 917 | dst += dst_step; |
| 918 | } |
| 919 | } |
| 920 | return 0; |
| 921 | } |
| 922 | |
| 923 | #endif |