Revision 7a24c800 audio/alsaaudio.c
| b/audio/alsaaudio.c | ||
|---|---|---|
| 58 | 58 |
int period_size_out_overridden; |
| 59 | 59 |
int verbose; |
| 60 | 60 |
} conf = {
|
| 61 |
#define DEFAULT_BUFFER_SIZE 1024 |
|
| 62 |
#define DEFAULT_PERIOD_SIZE 256 |
|
| 63 |
#ifdef HIGH_LATENCY |
|
| 64 |
.size_in_usec_in = 1, |
|
| 65 |
.size_in_usec_out = 1, |
|
| 66 |
#endif |
|
| 67 | 61 |
.pcm_name_out = "default", |
| 68 | 62 |
.pcm_name_in = "default", |
| 69 |
#ifdef HIGH_LATENCY |
|
| 70 |
.buffer_size_in = 400000, |
|
| 71 |
.period_size_in = 400000 / 4, |
|
| 72 |
.buffer_size_out = 400000, |
|
| 73 |
.period_size_out = 400000 / 4, |
|
| 74 |
#else |
|
| 75 |
.buffer_size_in = DEFAULT_BUFFER_SIZE * 4, |
|
| 76 |
.period_size_in = DEFAULT_PERIOD_SIZE * 4, |
|
| 77 |
.buffer_size_out = DEFAULT_BUFFER_SIZE, |
|
| 78 |
.period_size_out = DEFAULT_PERIOD_SIZE, |
|
| 79 |
.buffer_size_in_overridden = 0, |
|
| 80 |
.buffer_size_out_overridden = 0, |
|
| 81 |
.period_size_in_overridden = 0, |
|
| 82 |
.period_size_out_overridden = 0, |
|
| 83 |
#endif |
|
| 84 |
.threshold = 0, |
|
| 85 |
.verbose = 0 |
|
| 86 | 63 |
}; |
| 87 | 64 |
|
| 88 | 65 |
struct alsa_params_req {
|
| 89 | 66 |
int freq; |
| 90 | 67 |
snd_pcm_format_t fmt; |
| 91 | 68 |
int nchannels; |
| 69 |
int size_in_usec; |
|
| 92 | 70 |
unsigned int buffer_size; |
| 93 | 71 |
unsigned int period_size; |
| 94 | 72 |
}; |
| ... | ... | |
| 286 | 264 |
snd_pcm_t *handle; |
| 287 | 265 |
snd_pcm_hw_params_t *hw_params; |
| 288 | 266 |
int err; |
| 267 |
int size_in_usec; |
|
| 289 | 268 |
unsigned int freq, nchannels; |
| 290 | 269 |
const char *pcm_name = in ? conf.pcm_name_in : conf.pcm_name_out; |
| 291 |
unsigned int period_size, buffer_size; |
|
| 292 | 270 |
snd_pcm_uframes_t obt_buffer_size; |
| 293 | 271 |
const char *typ = in ? "ADC" : "DAC"; |
| 294 | 272 |
snd_pcm_format_t obtfmt; |
| 295 | 273 |
|
| 296 | 274 |
freq = req->freq; |
| 297 |
period_size = req->period_size; |
|
| 298 |
buffer_size = req->buffer_size; |
|
| 299 | 275 |
nchannels = req->nchannels; |
| 276 |
size_in_usec = req->size_in_usec; |
|
| 300 | 277 |
|
| 301 | 278 |
snd_pcm_hw_params_alloca (&hw_params); |
| 302 | 279 |
|
| ... | ... | |
| 356 | 333 |
goto err; |
| 357 | 334 |
} |
| 358 | 335 |
|
| 359 |
if (!((in && conf.size_in_usec_in) || (!in && conf.size_in_usec_out))) {
|
|
| 360 |
if (!buffer_size) {
|
|
| 361 |
buffer_size = DEFAULT_BUFFER_SIZE; |
|
| 362 |
period_size= DEFAULT_PERIOD_SIZE; |
|
| 363 |
} |
|
| 364 |
} |
|
| 365 |
|
|
| 366 |
if (buffer_size) {
|
|
| 367 |
if ((in && conf.size_in_usec_in) || (!in && conf.size_in_usec_out)) {
|
|
| 368 |
if (period_size) {
|
|
| 369 |
err = snd_pcm_hw_params_set_period_time_near ( |
|
| 370 |
handle, |
|
| 371 |
hw_params, |
|
| 372 |
&period_size, |
|
| 373 |
0 |
|
| 374 |
); |
|
| 375 |
if (err < 0) {
|
|
| 376 |
alsa_logerr2 (err, typ, |
|
| 377 |
"Failed to set period time %d\n", |
|
| 378 |
req->period_size); |
|
| 379 |
goto err; |
|
| 380 |
} |
|
| 381 |
} |
|
| 336 |
if (req->buffer_size) {
|
|
| 337 |
if (size_in_usec) {
|
|
| 338 |
int dir = 0; |
|
| 339 |
unsigned int btime = req->buffer_size; |
|
| 382 | 340 |
|
| 383 | 341 |
err = snd_pcm_hw_params_set_buffer_time_near ( |
| 384 | 342 |
handle, |
| 385 | 343 |
hw_params, |
| 386 |
&buffer_size,
|
|
| 387 |
0
|
|
| 344 |
&btime,
|
|
| 345 |
&dir
|
|
| 388 | 346 |
); |
| 389 |
|
|
| 390 |
if (err < 0) {
|
|
| 391 |
alsa_logerr2 (err, typ, |
|
| 392 |
"Failed to set buffer time %d\n", |
|
| 393 |
req->buffer_size); |
|
| 394 |
goto err; |
|
| 395 |
} |
|
| 396 | 347 |
} |
| 397 | 348 |
else {
|
| 398 |
int dir; |
|
| 399 |
snd_pcm_uframes_t minval; |
|
| 400 |
|
|
| 401 |
if (period_size) {
|
|
| 402 |
minval = period_size; |
|
| 403 |
dir = 0; |
|
| 404 |
|
|
| 405 |
err = snd_pcm_hw_params_get_period_size_min ( |
|
| 406 |
hw_params, |
|
| 407 |
&minval, |
|
| 408 |
&dir |
|
| 409 |
); |
|
| 410 |
if (err < 0) {
|
|
| 411 |
alsa_logerr ( |
|
| 412 |
err, |
|
| 413 |
"Could not get minmal period size for %s\n", |
|
| 414 |
typ |
|
| 415 |
); |
|
| 416 |
} |
|
| 417 |
else {
|
|
| 418 |
if (period_size < minval) {
|
|
| 419 |
if ((in && conf.period_size_in_overridden) |
|
| 420 |
|| (!in && conf.period_size_out_overridden)) {
|
|
| 421 |
dolog ("%s period size(%d) is less "
|
|
| 422 |
"than minmal period size(%ld)\n", |
|
| 423 |
typ, |
|
| 424 |
period_size, |
|
| 425 |
minval); |
|
| 426 |
} |
|
| 427 |
period_size = minval; |
|
| 428 |
} |
|
| 429 |
} |
|
| 349 |
snd_pcm_uframes_t bsize = req->buffer_size; |
|
| 430 | 350 |
|
| 431 |
err = snd_pcm_hw_params_set_period_size ( |
|
| 432 |
handle, |
|
| 433 |
hw_params, |
|
| 434 |
period_size, |
|
| 435 |
0 |
|
| 436 |
); |
|
| 437 |
if (err < 0) {
|
|
| 438 |
alsa_logerr2 (err, typ, "Failed to set period size %d\n", |
|
| 439 |
req->period_size); |
|
| 440 |
goto err; |
|
| 441 |
} |
|
| 442 |
} |
|
| 351 |
err = snd_pcm_hw_params_set_buffer_size_near ( |
|
| 352 |
handle, |
|
| 353 |
hw_params, |
|
| 354 |
&bsize |
|
| 355 |
); |
|
| 356 |
} |
|
| 357 |
if (err < 0) {
|
|
| 358 |
alsa_logerr2 (err, typ, "Failed to set buffer %s to %d\n", |
|
| 359 |
size_in_usec ? "time" : "size", req->buffer_size); |
|
| 360 |
goto err; |
|
| 361 |
} |
|
| 362 |
} |
|
| 363 |
|
|
| 364 |
if (req->period_size) {
|
|
| 365 |
if (size_in_usec) {
|
|
| 366 |
int dir = 0; |
|
| 367 |
unsigned int ptime = req->period_size; |
|
| 443 | 368 |
|
| 444 |
minval = buffer_size;
|
|
| 445 |
err = snd_pcm_hw_params_get_buffer_size_min (
|
|
| 369 |
err = snd_pcm_hw_params_set_period_time_near (
|
|
| 370 |
handle,
|
|
| 446 | 371 |
hw_params, |
| 447 |
&minval |
|
| 372 |
&ptime, |
|
| 373 |
&dir |
|
| 448 | 374 |
); |
| 449 |
if (err < 0) {
|
|
| 450 |
alsa_logerr (err, "Could not get minmal buffer size for %s\n", |
|
| 451 |
typ); |
|
| 452 |
} |
|
| 453 |
else {
|
|
| 454 |
if (buffer_size < minval) {
|
|
| 455 |
if ((in && conf.buffer_size_in_overridden) |
|
| 456 |
|| (!in && conf.buffer_size_out_overridden)) {
|
|
| 457 |
dolog ( |
|
| 458 |
"%s buffer size(%d) is less " |
|
| 459 |
"than minimal buffer size(%ld)\n", |
|
| 460 |
typ, |
|
| 461 |
buffer_size, |
|
| 462 |
minval |
|
| 463 |
); |
|
| 464 |
} |
|
| 465 |
buffer_size = minval; |
|
| 466 |
} |
|
| 467 |
} |
|
| 375 |
} |
|
| 376 |
else {
|
|
| 377 |
snd_pcm_uframes_t psize = req->period_size; |
|
| 468 | 378 |
|
| 469 |
err = snd_pcm_hw_params_set_buffer_size ( |
|
| 379 |
err = snd_pcm_hw_params_set_buffer_size_near (
|
|
| 470 | 380 |
handle, |
| 471 | 381 |
hw_params, |
| 472 |
buffer_size
|
|
| 382 |
&psize
|
|
| 473 | 383 |
); |
| 474 |
if (err < 0) {
|
|
| 475 |
alsa_logerr2 (err, typ, "Failed to set buffer size %d\n", |
|
| 476 |
req->buffer_size); |
|
| 477 |
goto err; |
|
| 478 |
} |
|
| 479 | 384 |
} |
| 480 |
} |
|
| 481 |
else {
|
|
| 482 |
dolog ("warning: Buffer size is not set\n");
|
|
| 385 |
|
|
| 386 |
if (err < 0) {
|
|
| 387 |
alsa_logerr2 (err, typ, "Failed to set period %s to %d\n", |
|
| 388 |
size_in_usec ? "time" : "size", req->period_size); |
|
| 389 |
goto err; |
|
| 390 |
} |
|
| 483 | 391 |
} |
| 484 | 392 |
|
| 485 | 393 |
err = snd_pcm_hw_params (handle, hw_params); |
| ... | ... | |
| 697 | 605 |
req.nchannels = as->nchannels; |
| 698 | 606 |
req.period_size = conf.period_size_out; |
| 699 | 607 |
req.buffer_size = conf.buffer_size_out; |
| 608 |
req.size_in_usec = conf.size_in_usec_in; |
|
| 700 | 609 |
|
| 701 | 610 |
if (alsa_open (0, &req, &obt, &handle)) {
|
| 702 | 611 |
return -1; |
| ... | ... | |
| 774 | 683 |
req.nchannels = as->nchannels; |
| 775 | 684 |
req.period_size = conf.period_size_in; |
| 776 | 685 |
req.buffer_size = conf.buffer_size_in; |
| 686 |
req.size_in_usec = conf.size_in_usec_in; |
|
| 777 | 687 |
|
| 778 | 688 |
if (alsa_open (1, &req, &obt, &handle)) {
|
| 779 | 689 |
return -1; |
| ... | ... | |
| 953 | 863 |
{"DAC_SIZE_IN_USEC", AUD_OPT_BOOL, &conf.size_in_usec_out,
|
| 954 | 864 |
"DAC period/buffer size in microseconds (otherwise in frames)", NULL, 0}, |
| 955 | 865 |
{"DAC_PERIOD_SIZE", AUD_OPT_INT, &conf.period_size_out,
|
| 956 |
"DAC period size", &conf.period_size_out_overridden, 0}, |
|
| 866 |
"DAC period size (0 to go with system default)", |
|
| 867 |
&conf.period_size_out_overridden, 0}, |
|
| 957 | 868 |
{"DAC_BUFFER_SIZE", AUD_OPT_INT, &conf.buffer_size_out,
|
| 958 |
"DAC buffer size", &conf.buffer_size_out_overridden, 0}, |
|
| 869 |
"DAC buffer size (0 to go with system default)", |
|
| 870 |
&conf.buffer_size_out_overridden, 0}, |
|
| 959 | 871 |
|
| 960 | 872 |
{"ADC_SIZE_IN_USEC", AUD_OPT_BOOL, &conf.size_in_usec_in,
|
| 961 | 873 |
"ADC period/buffer size in microseconds (otherwise in frames)", NULL, 0}, |
| 962 | 874 |
{"ADC_PERIOD_SIZE", AUD_OPT_INT, &conf.period_size_in,
|
| 963 |
"ADC period size", &conf.period_size_in_overridden, 0}, |
|
| 875 |
"ADC period size (0 to go with system default)", |
|
| 876 |
&conf.period_size_in_overridden, 0}, |
|
| 964 | 877 |
{"ADC_BUFFER_SIZE", AUD_OPT_INT, &conf.buffer_size_in,
|
| 965 |
"ADC buffer size", &conf.buffer_size_in_overridden, 0}, |
|
| 878 |
"ADC buffer size (0 to go with system default)", |
|
| 879 |
&conf.buffer_size_in_overridden, 0}, |
|
| 966 | 880 |
|
| 967 | 881 |
{"THRESHOLD", AUD_OPT_INT, &conf.threshold,
|
| 968 | 882 |
"(undocumented)", NULL, 0}, |
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