4 * Copyright (c) 2016 Samsung Electronics Co., Ltd. All rights reserved.
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
29 #include "tizen-audio-internal.h"
30 #include "tizen-audio-impl.h"
32 #ifndef __USE_TINYALSA__
33 #define DEVICE_NAME_MAX 32
36 #ifdef __USE_TINYALSA__
37 /* Convert pcm format from pulse to alsa */
38 static const uint32_t g_format_convert_table[] = {
39 [AUDIO_SAMPLE_U8] = PCM_FORMAT_S8,
40 [AUDIO_SAMPLE_S16LE] = PCM_FORMAT_S16_LE,
41 [AUDIO_SAMPLE_S32LE] = PCM_FORMAT_S32_LE,
42 [AUDIO_SAMPLE_S24_32LE] = PCM_FORMAT_S24_LE
45 /* FIXME : To avoid build warning... */
46 int _snd_pcm_poll_descriptor(snd_pcm_t *pcm);
47 /* Convert pcm format from pulse to alsa */
48 static const uint32_t g_format_convert_table[] = {
49 [AUDIO_SAMPLE_U8] = SND_PCM_FORMAT_U8,
50 [AUDIO_SAMPLE_ALAW] = SND_PCM_FORMAT_A_LAW,
51 [AUDIO_SAMPLE_ULAW] = SND_PCM_FORMAT_MU_LAW,
52 [AUDIO_SAMPLE_S16LE] = SND_PCM_FORMAT_S16_LE,
53 [AUDIO_SAMPLE_S16BE] = SND_PCM_FORMAT_S16_BE,
54 [AUDIO_SAMPLE_FLOAT32LE] = SND_PCM_FORMAT_FLOAT_LE,
55 [AUDIO_SAMPLE_FLOAT32BE] = SND_PCM_FORMAT_FLOAT_BE,
56 [AUDIO_SAMPLE_S32LE] = SND_PCM_FORMAT_S32_LE,
57 [AUDIO_SAMPLE_S32BE] = SND_PCM_FORMAT_S32_BE,
58 [AUDIO_SAMPLE_S24LE] = SND_PCM_FORMAT_S24_3LE,
59 [AUDIO_SAMPLE_S24BE] = SND_PCM_FORMAT_S24_3BE,
60 [AUDIO_SAMPLE_S24_32LE] = SND_PCM_FORMAT_S24_LE,
61 [AUDIO_SAMPLE_S24_32BE] = SND_PCM_FORMAT_S24_BE
65 static uint32_t __convert_format(audio_sample_format_t format)
67 return g_format_convert_table[format];
70 #ifdef __USE_TINYALSA__
71 static int __parse_card_device_number(const char *card, const char *device, unsigned int *card_u, unsigned int *device_u) {
72 AUDIO_RETURN_VAL_IF_FAIL(card, AUDIO_ERR_PARAMETER);
73 AUDIO_RETURN_VAL_IF_FAIL(device, AUDIO_ERR_PARAMETER);
74 AUDIO_RETURN_VAL_IF_FAIL(card_u, AUDIO_ERR_PARAMETER);
75 AUDIO_RETURN_VAL_IF_FAIL(device_u, AUDIO_ERR_PARAMETER);
77 AUDIO_LOG_DEBUG("card : %s, device : %s", card, device);
79 *card_u = (unsigned int) strtol(card, NULL, 10);
80 *device_u = (unsigned int) strtol(device, NULL, 10);
85 static struct pcm *__tinyalsa_open_device(const char *card, const char *device, audio_pcm_sample_spec_t *ss, size_t period_size, size_t period_count, uint32_t direction)
87 struct pcm *pcm = NULL;
88 struct pcm_config config;
89 unsigned int card_u, device_u;
91 AUDIO_RETURN_NULL_IF_FAIL(device);
92 AUDIO_RETURN_NULL_IF_FAIL(ss);
94 config.channels = ss->channels;
95 config.rate = ss->rate;
96 config.period_size = period_size;
97 config.period_count = period_count;
98 config.format = ss->format;
99 config.start_threshold = period_size;
100 config.stop_threshold = 0xFFFFFFFF;
101 config.silence_threshold = 0;
103 AUDIO_LOG_INFO("card %s, device %s, direction %d, channels %d, rate %d, format %d, period_size %d, period_count %d",
104 card, device, direction, ss->channels, ss->rate, ss->format, period_size, period_count);
106 if (__parse_card_device_number(card, device, &card_u, &device_u) < 0) {
107 AUDIO_LOG_ERROR("Failed to get card device number from %s", device);
111 pcm = pcm_open(card_u, device_u, (direction == AUDIO_DIRECTION_OUT) ? PCM_OUT : PCM_IN, &config);
112 if (!pcm || !pcm_is_ready(pcm)) {
113 AUDIO_LOG_ERROR("Unable to open device (%s)", pcm_get_error(pcm));
121 static int __tinyalsa_pcm_recover(struct pcm *pcm, int err)
125 if (err == -EINTR) /* nothing to do, continue */
128 AUDIO_LOG_INFO("XRUN occurred");
129 err = pcm_prepare(pcm);
131 AUDIO_LOG_ERROR("Could not recover from XRUN occurred, prepare failed : %d", err);
136 if (err == -ESTRPIPE) {
137 /* tinyalsa does not support pcm resume, dont't care suspend case */
138 AUDIO_LOG_ERROR("Could not recover from suspend : %d", err);
145 #ifndef __USE_TINYALSA__
146 static int __make_alsa_device_name(const char *card, const char *device, char device_name[])
148 AUDIO_RETURN_VAL_IF_FAIL(card, AUDIO_ERR_PARAMETER);
149 AUDIO_RETURN_VAL_IF_FAIL(device, AUDIO_ERR_PARAMETER);
150 AUDIO_RETURN_VAL_IF_FAIL(device_name, AUDIO_ERR_PARAMETER);
152 snprintf(device_name, DEVICE_NAME_MAX, "hw:%s,%s", card, device);
157 audio_return_t _pcm_open(const char *card, const char *device, uint32_t direction, void *sample_spec,
158 uint32_t period_size, uint32_t periods, void **pcm_handle)
162 AUDIO_RETURN_VAL_IF_FAIL(card, AUDIO_ERR_PARAMETER);
163 AUDIO_RETURN_VAL_IF_FAIL(device, AUDIO_ERR_PARAMETER);
164 AUDIO_RETURN_VAL_IF_FAIL((direction == AUDIO_DIRECTION_OUT) || (direction == AUDIO_DIRECTION_IN),
165 AUDIO_ERR_PARAMETER);
167 AUDIO_LOG_INFO("card(%s) device(%s) direction(%u) period_size(%u) periods(%u)",
168 card, device, direction, period_size, periods);
169 #ifdef __USE_TINYALSA__
170 audio_pcm_sample_spec_t *ss;
172 ss = (audio_pcm_sample_spec_t *)sample_spec;
173 ss->format = __convert_format((audio_sample_format_t)ss->format);
175 *pcm_handle = __tinyalsa_open_device(card, device, ss, (size_t)period_size, (size_t)periods, direction);
176 if (*pcm_handle == NULL) {
177 AUDIO_LOG_ERROR("Error opening PCM device");
178 return AUDIO_ERR_RESOURCE;
181 if ((err = pcm_prepare((struct pcm *)*pcm_handle)) != 0) {
182 AUDIO_LOG_ERROR("Error prepare PCM device : %d", err);
188 char device_name[DEVICE_NAME_MAX];
190 __make_alsa_device_name(card, device, device_name);
191 mode = SND_PCM_NONBLOCK | SND_PCM_NO_AUTO_RESAMPLE | SND_PCM_NO_AUTO_CHANNELS | SND_PCM_NO_AUTO_FORMAT;
193 if ((err = snd_pcm_open((snd_pcm_t **)pcm_handle, device_name, (direction == AUDIO_DIRECTION_OUT) ? SND_PCM_STREAM_PLAYBACK : SND_PCM_STREAM_CAPTURE, mode)) < 0) {
194 AUDIO_LOG_ERROR("Error opening PCM device %s : %s", device_name, snd_strerror(err));
195 return AUDIO_ERR_RESOURCE;
198 if ((ret = _pcm_set_params(*pcm_handle, direction, sample_spec, period_size, periods)) != AUDIO_RET_OK) {
199 AUDIO_LOG_ERROR("Failed to set pcm parameters : %d", ret);
203 AUDIO_LOG_INFO("PCM device %s", device_name);
209 audio_return_t _pcm_start(void *pcm_handle)
213 #ifdef __USE_TINYALSA__
214 if ((err = pcm_start(pcm_handle)) < 0) {
215 AUDIO_LOG_ERROR("Error starting PCM handle : %d", err);
216 return AUDIO_ERR_RESOURCE;
219 if ((err = snd_pcm_start(pcm_handle)) < 0) {
220 AUDIO_LOG_ERROR("Error starting PCM handle : %s", snd_strerror(err));
221 return AUDIO_ERR_RESOURCE;
225 AUDIO_LOG_INFO("PCM handle 0x%x start", pcm_handle);
229 audio_return_t _pcm_stop(void *pcm_handle)
233 #ifdef __USE_TINYALSA__
234 if ((err = pcm_stop(pcm_handle)) < 0) {
235 AUDIO_LOG_ERROR("Error stopping PCM handle : %d", err);
236 return AUDIO_ERR_RESOURCE;
239 if ((err = snd_pcm_drop(pcm_handle)) < 0) {
240 AUDIO_LOG_ERROR("Error stopping PCM handle : %s", snd_strerror(err));
241 return AUDIO_ERR_RESOURCE;
245 AUDIO_LOG_INFO("PCM handle 0x%x stop", pcm_handle);
249 audio_return_t _pcm_close(void *pcm_handle)
253 AUDIO_LOG_INFO("Try to close PCM handle 0x%x", pcm_handle);
255 #ifdef __USE_TINYALSA__
256 if ((err = pcm_close(pcm_handle)) < 0) {
257 AUDIO_LOG_ERROR("Error closing PCM handle : %d", err);
258 return AUDIO_ERR_RESOURCE;
261 if ((err = snd_pcm_close(pcm_handle)) < 0) {
262 AUDIO_LOG_ERROR("Error closing PCM handle : %s", snd_strerror(err));
263 return AUDIO_ERR_RESOURCE;
270 audio_return_t _pcm_avail(void *pcm_handle, uint32_t *avail)
272 #ifdef __USE_TINYALSA__
273 struct timespec tspec;
274 unsigned int frames_avail = 0;
277 err = pcm_get_htimestamp(pcm_handle, &frames_avail, &tspec);
279 AUDIO_LOG_ERROR("Could not get avail and timespec at PCM handle 0x%x : %d", pcm_handle, err);
280 return AUDIO_ERR_IOCTL;
284 AUDIO_LOG_DEBUG("avail = %d", frames_avail);
287 *avail = (uint32_t)frames_avail;
289 snd_pcm_sframes_t frames_avail;
291 if ((frames_avail = snd_pcm_avail(pcm_handle)) < 0) {
292 AUDIO_LOG_ERROR("Could not get avail at PCM handle 0x%x : %d", pcm_handle, frames_avail);
293 return AUDIO_ERR_IOCTL;
297 AUDIO_LOG_DEBUG("avail = %d", frames_avail);
300 *avail = (uint32_t)frames_avail;
306 audio_return_t _pcm_write(void *pcm_handle, const void *buffer, uint32_t frames)
308 #ifdef __USE_TINYALSA__
311 err = pcm_write(pcm_handle, buffer, pcm_frames_to_bytes(pcm_handle, (unsigned int)frames));
313 AUDIO_LOG_ERROR("Failed to write pcm : %d", err);
314 return AUDIO_ERR_IOCTL;
318 AUDIO_LOG_DEBUG("_pcm_write = %d", frames);
321 snd_pcm_sframes_t frames_written;
323 AUDIO_RETURN_VAL_IF_FAIL(pcm_handle, AUDIO_ERR_PARAMETER);
325 frames_written = snd_pcm_writei(pcm_handle, buffer, (snd_pcm_uframes_t) frames);
326 if (frames_written < 0) {
327 AUDIO_LOG_ERROR("Failed to write pcm : %d", frames_written);
328 return AUDIO_ERR_IOCTL;
332 AUDIO_LOG_DEBUG("_pcm_write = (%d / %d)", frames_written, frames);
339 audio_return_t _pcm_read(void *pcm_handle, void *buffer, uint32_t frames)
341 #ifdef __USE_TINYALSA__
344 err = pcm_read(pcm_handle, buffer, pcm_frames_to_bytes(pcm_handle, (unsigned int)frames));
346 AUDIO_LOG_ERROR("Failed to read pcm : %d", err);
347 return AUDIO_ERR_IOCTL;
351 AUDIO_LOG_DEBUG("audio_pcm_read = %d", frames);
354 snd_pcm_sframes_t frames_read;
356 frames_read = snd_pcm_readi(pcm_handle, buffer, (snd_pcm_uframes_t)frames);
357 if (frames_read < 0) {
358 AUDIO_LOG_ERROR("Failed to read pcm : %d", frames_read);
359 return AUDIO_ERR_IOCTL;
363 AUDIO_LOG_DEBUG("_pcm_read = (%d / %d)", frames_read, frames);
370 audio_return_t _pcm_get_fd(void *pcm_handle, int *fd)
372 /* we use an internal API of the (tiny)alsa library, so it causes warning message during compile */
373 #ifdef __USE_TINYALSA__
374 *fd = _pcm_poll_descriptor((struct pcm *)pcm_handle);
376 *fd = _snd_pcm_poll_descriptor((snd_pcm_t *)pcm_handle);
381 audio_return_t _pcm_recover(void *pcm_handle, int revents)
385 AUDIO_RETURN_VAL_IF_FAIL(pcm_handle, AUDIO_ERR_PARAMETER);
387 if (revents & POLLERR)
388 AUDIO_LOG_DEBUG("Got POLLERR from ALSA");
389 if (revents & POLLNVAL)
390 AUDIO_LOG_DEBUG("Got POLLNVAL from ALSA");
391 if (revents & POLLHUP)
392 AUDIO_LOG_DEBUG("Got POLLHUP from ALSA");
393 if (revents & POLLPRI)
394 AUDIO_LOG_DEBUG("Got POLLPRI from ALSA");
395 if (revents & POLLIN)
396 AUDIO_LOG_DEBUG("Got POLLIN from ALSA");
397 if (revents & POLLOUT)
398 AUDIO_LOG_DEBUG("Got POLLOUT from ALSA");
400 #ifdef __USE_TINYALSA__
401 state = pcm_state(pcm_handle);
402 AUDIO_LOG_DEBUG("PCM state is %d", state);
406 if ((err = __tinyalsa_pcm_recover(pcm_handle, -EPIPE)) != 0) {
407 AUDIO_LOG_ERROR("Could not recover from POLLERR|POLLNVAL|POLLHUP and XRUN : %d", err);
408 return AUDIO_ERR_IOCTL;
412 case PCM_STATE_SUSPENDED:
413 if ((err = __tinyalsa_pcm_recover(pcm_handle, -ESTRPIPE)) != 0) {
414 AUDIO_LOG_ERROR("Could not recover from POLLERR|POLLNVAL|POLLHUP and SUSPENDED : %d", err);
415 return AUDIO_ERR_IOCTL;
420 pcm_stop(pcm_handle);
421 if ((err = pcm_prepare(pcm_handle)) < 0) {
422 AUDIO_LOG_ERROR("Could not recover from POLLERR|POLLNVAL|POLLHUP with pcm_prepare() : %d", err);
423 return AUDIO_ERR_IOCTL;
427 state = snd_pcm_state(pcm_handle);
428 AUDIO_LOG_DEBUG("PCM state is %s", snd_pcm_state_name(state));
430 /* Try to recover from this error */
433 case SND_PCM_STATE_XRUN:
434 if ((err = snd_pcm_recover(pcm_handle, -EPIPE, 1)) != 0) {
435 AUDIO_LOG_ERROR("Could not recover from POLLERR|POLLNVAL|POLLHUP and XRUN : %d", err);
436 return AUDIO_ERR_IOCTL;
440 case SND_PCM_STATE_SUSPENDED:
441 if ((err = snd_pcm_recover(pcm_handle, -ESTRPIPE, 1)) != 0) {
442 AUDIO_LOG_ERROR("Could not recover from POLLERR|POLLNVAL|POLLHUP and SUSPENDED : %d", err);
443 return AUDIO_ERR_IOCTL;
448 snd_pcm_drop(pcm_handle);
449 if ((err = snd_pcm_prepare(pcm_handle)) < 0) {
450 AUDIO_LOG_ERROR("Could not recover from POLLERR|POLLNVAL|POLLHUP with snd_pcm_prepare() : %d", err);
451 return AUDIO_ERR_IOCTL;
457 AUDIO_LOG_DEBUG("_pcm_recover");
461 audio_return_t _pcm_get_params(void *pcm_handle, uint32_t direction, void **sample_spec, uint32_t *period_size, uint32_t *periods)
463 #ifdef __USE_TINYALSA__
464 audio_pcm_sample_spec_t *ss;
465 unsigned int _period_size, _buffer_size, _periods, _format, _rate, _channels;
466 unsigned int _start_threshold, _stop_threshold, _silence_threshold;
467 struct pcm_config *config;
469 ss = (audio_pcm_sample_spec_t *)*sample_spec;
471 /* we use an internal API of the tiny alsa library, so it causes warning message during compile */
472 _pcm_config(pcm_handle, &config);
474 *period_size = config->period_size;
475 *periods = config->period_count;
476 _buffer_size = config->period_size * config->period_count;
477 ss->format = config->format;
478 ss->rate = config->rate;
479 ss->channels = config->channels;
480 _start_threshold = config->start_threshold;
481 _stop_threshold = config->stop_threshold;
482 _silence_threshold = config->silence_threshold;
484 AUDIO_LOG_DEBUG("_pcm_get_params (handle 0x%x, format %d, rate %d, channels %d, period_size %d, periods %d, buffer_size %d)", pcm_handle, config->format, config->rate, config->channels, config->period_size, config->period_count, _buffer_size);
487 audio_pcm_sample_spec_t *ss;
489 snd_pcm_uframes_t _period_size, _buffer_size;
490 snd_pcm_format_t _format;
491 unsigned int _rate, _channels;
492 snd_pcm_uframes_t _start_threshold, _stop_threshold, _silence_threshold, _avail_min;
493 unsigned int _periods;
494 snd_pcm_hw_params_t *hwparams;
495 snd_pcm_sw_params_t *swparams;
497 ss = (audio_pcm_sample_spec_t *)*sample_spec;
499 snd_pcm_hw_params_alloca(&hwparams);
500 snd_pcm_sw_params_alloca(&swparams);
502 if ((err = snd_pcm_hw_params_current(pcm_handle, hwparams)) < 0) {
503 AUDIO_LOG_ERROR("snd_pcm_hw_params_current() failed : %d", err);
504 return AUDIO_ERR_PARAMETER;
507 if ((err = snd_pcm_hw_params_get_period_size(hwparams, &_period_size, &dir)) < 0 ||
508 (err = snd_pcm_hw_params_get_buffer_size(hwparams, &_buffer_size)) < 0 ||
509 (err = snd_pcm_hw_params_get_periods(hwparams, &_periods, &dir)) < 0 ||
510 (err = snd_pcm_hw_params_get_format(hwparams, &_format)) < 0 ||
511 (err = snd_pcm_hw_params_get_rate(hwparams, &_rate, &dir)) < 0 ||
512 (err = snd_pcm_hw_params_get_channels(hwparams, &_channels)) < 0) {
513 AUDIO_LOG_ERROR("snd_pcm_hw_params_get_{period_size|buffer_size|periods|format|rate|channels}() failed : %s", err);
514 return AUDIO_ERR_PARAMETER;
517 *period_size = _period_size;
519 ss->format = _format;
521 ss->channels = _channels;
523 if ((err = snd_pcm_sw_params_current(pcm_handle, swparams)) < 0) {
524 AUDIO_LOG_ERROR("snd_pcm_sw_params_current() failed : %d", err);
525 return AUDIO_ERR_PARAMETER;
528 if ((err = snd_pcm_sw_params_get_start_threshold(swparams, &_start_threshold)) < 0 ||
529 (err = snd_pcm_sw_params_get_stop_threshold(swparams, &_stop_threshold)) < 0 ||
530 (err = snd_pcm_sw_params_get_silence_threshold(swparams, &_silence_threshold)) < 0 ||
531 (err = snd_pcm_sw_params_get_avail_min(swparams, &_avail_min)) < 0) {
532 AUDIO_LOG_ERROR("snd_pcm_sw_params_get_{start_threshold|stop_threshold|silence_threshold|avail_min}() failed : %s", err);
535 AUDIO_LOG_DEBUG("_pcm_get_params (handle 0x%x, format %d, rate %d, channels %d, period_size %d, periods %d, buffer_size %d)", pcm_handle, _format, _rate, _channels, _period_size, _periods, _buffer_size);
541 audio_return_t _pcm_set_params(void *pcm_handle, uint32_t direction, void *sample_spec, uint32_t period_size, uint32_t periods)
543 #ifdef __USE_TINYALSA__
544 /* Parameters are only acceptable in pcm_open() function */
545 AUDIO_LOG_DEBUG("_pcm_set_params");
548 audio_pcm_sample_spec_t ss;
549 snd_pcm_uframes_t _buffer_size;
550 snd_pcm_hw_params_t *hwparams;
551 snd_pcm_sw_params_t *swparams;
553 ss = *(audio_pcm_sample_spec_t *)sample_spec;
555 snd_pcm_hw_params_alloca(&hwparams);
556 snd_pcm_sw_params_alloca(&swparams);
559 if ((err = snd_pcm_hw_params_any(pcm_handle, hwparams)) < 0) {
560 AUDIO_LOG_ERROR("snd_pcm_hw_params_any() failed : %d", err);
561 return AUDIO_ERR_PARAMETER;
564 if ((err = snd_pcm_hw_params_set_rate_resample(pcm_handle, hwparams, 0)) < 0) {
565 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_rate_resample() failed : %d", err);
566 return AUDIO_ERR_PARAMETER;
569 if ((err = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
570 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_access() failed : %d", err);
571 return AUDIO_ERR_PARAMETER;
574 ss.format = __convert_format((audio_sample_format_t)ss.format);
575 if ((err = snd_pcm_hw_params_set_format(pcm_handle, hwparams, ss.format)) < 0) {
576 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_format() failed : %d", err);
577 return AUDIO_ERR_PARAMETER;
580 if ((err = snd_pcm_hw_params_set_rate(pcm_handle, hwparams, ss.rate, 0)) < 0) {
581 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_rate() failed : %d", err);
582 return AUDIO_ERR_PARAMETER;
585 if ((err = snd_pcm_hw_params_set_channels(pcm_handle, hwparams, ss.channels)) < 0) {
586 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_channels(%u) failed : %d", ss.channels, err);
587 return AUDIO_ERR_PARAMETER;
590 if ((err = snd_pcm_hw_params_set_period_size(pcm_handle, hwparams, period_size, 0)) < 0) {
591 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_period_size(%u) failed : %d", period_size, err);
592 return AUDIO_ERR_PARAMETER;
595 if ((err = snd_pcm_hw_params_set_periods(pcm_handle, hwparams, periods, 0)) < 0) {
596 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_periods(%u) failed : %d", periods, err);
597 return AUDIO_ERR_PARAMETER;
600 _buffer_size = period_size * periods;
601 if ((err = snd_pcm_hw_params_set_buffer_size(pcm_handle, hwparams, _buffer_size)) < 0) {
602 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_buffer_size(%u) failed : %d", _buffer_size, err);
603 return AUDIO_ERR_PARAMETER;
606 if ((err = snd_pcm_hw_params(pcm_handle, hwparams)) < 0) {
607 AUDIO_LOG_ERROR("snd_pcm_hw_params failed : %d", err);
608 return AUDIO_ERR_IOCTL;
612 if ((err = snd_pcm_sw_params_current(pcm_handle, swparams)) < 0) {
613 AUDIO_LOG_ERROR("Unable to determine current swparams : %d", err);
614 return AUDIO_ERR_PARAMETER;
617 if ((err = snd_pcm_sw_params_set_tstamp_mode(pcm_handle, swparams, SND_PCM_TSTAMP_ENABLE)) < 0) {
618 AUDIO_LOG_ERROR("Unable to enable time stamping : %d", err);
619 return AUDIO_ERR_PARAMETER;
622 if ((err = snd_pcm_sw_params_set_stop_threshold(pcm_handle, swparams, 0xFFFFFFFF)) < 0) {
623 AUDIO_LOG_ERROR("Unable to set stop threshold : %d", err);
624 return AUDIO_ERR_PARAMETER;
627 if ((err = snd_pcm_sw_params_set_start_threshold(pcm_handle, swparams, period_size / 2)) < 0) {
628 AUDIO_LOG_ERROR("Unable to set start threshold : %d", err);
629 return AUDIO_ERR_PARAMETER;
632 if ((err = snd_pcm_sw_params_set_avail_min(pcm_handle, swparams, 1024)) < 0) {
633 AUDIO_LOG_ERROR("snd_pcm_sw_params_set_avail_min() failed : %d", err);
634 return AUDIO_ERR_PARAMETER;
637 if ((err = snd_pcm_sw_params(pcm_handle, swparams)) < 0) {
638 AUDIO_LOG_ERROR("Unable to set sw params : %d", err);
639 return AUDIO_ERR_IOCTL;
643 if ((err = snd_pcm_prepare(pcm_handle)) < 0) {
644 AUDIO_LOG_ERROR("snd_pcm_prepare() failed : %d", err);
645 return AUDIO_ERR_IOCTL;
648 AUDIO_LOG_DEBUG("_pcm_set_params (handle 0x%x, format %d, rate %d, channels %d, period_size %d, periods %d, buffer_size %d)", pcm_handle, ss.format, ss.rate, ss.channels, period_size, periods, _buffer_size);
654 /* Generic snd pcm interface APIs */
655 audio_return_t _pcm_set_hw_params(snd_pcm_t *pcm, audio_pcm_sample_spec_t *sample_spec, uint8_t *use_mmap, snd_pcm_uframes_t *period_size, snd_pcm_uframes_t *buffer_size)
657 audio_return_t ret = AUDIO_RET_OK;
658 snd_pcm_hw_params_t *hwparams;
661 unsigned int val = 0;
662 snd_pcm_uframes_t _period_size = period_size ? *period_size : 0;
663 snd_pcm_uframes_t _buffer_size = buffer_size ? *buffer_size : 0;
664 uint8_t _use_mmap = use_mmap && *use_mmap;
665 uint32_t channels = 0;
667 AUDIO_RETURN_VAL_IF_FAIL(pcm, AUDIO_ERR_PARAMETER);
669 snd_pcm_hw_params_alloca(&hwparams);
671 /* Skip parameter setting to null device. */
672 if (snd_pcm_type(pcm) == SND_PCM_TYPE_NULL)
673 return AUDIO_ERR_IOCTL;
675 /* Allocate a hardware parameters object. */
676 snd_pcm_hw_params_alloca(&hwparams);
678 /* Fill it in with default values. */
679 if (snd_pcm_hw_params_any(pcm, hwparams) < 0) {
680 AUDIO_LOG_ERROR("snd_pcm_hw_params_any() : failed! - %s\n", snd_strerror(err));
684 /* Set the desired hardware parameters. */
688 if (snd_pcm_hw_params_set_access(pcm, hwparams, SND_PCM_ACCESS_MMAP_INTERLEAVED) < 0) {
690 /* mmap() didn't work, fall back to interleaved */
692 if ((ret = snd_pcm_hw_params_set_access(pcm, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
693 AUDIO_LOG_DEBUG("snd_pcm_hw_params_set_access() failed: %s", snd_strerror(ret));
700 } else if ((ret = snd_pcm_hw_params_set_access(pcm, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
701 AUDIO_LOG_DEBUG("snd_pcm_hw_params_set_access() failed: %s", snd_strerror(ret));
704 AUDIO_LOG_DEBUG("setting rate - %d", sample_spec->rate);
705 err = snd_pcm_hw_params_set_rate(pcm, hwparams, sample_spec->rate, 0);
707 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_rate() : failed! - %s\n", snd_strerror(err));
710 err = snd_pcm_hw_params(pcm, hwparams);
712 AUDIO_LOG_ERROR("snd_pcm_hw_params() : failed! - %s\n", snd_strerror(err));
716 /* Dump current param */
718 if ((ret = snd_pcm_hw_params_current(pcm, hwparams)) < 0) {
719 AUDIO_LOG_INFO("snd_pcm_hw_params_current() failed: %s", snd_strerror(ret));
723 if ((ret = snd_pcm_hw_params_get_period_size(hwparams, &_period_size, &dir)) < 0 ||
724 (ret = snd_pcm_hw_params_get_buffer_size(hwparams, &_buffer_size)) < 0) {
725 AUDIO_LOG_INFO("snd_pcm_hw_params_get_{period|buffer}_size() failed: %s", snd_strerror(ret));
729 snd_pcm_hw_params_get_access(hwparams, (snd_pcm_access_t *) &val);
730 AUDIO_LOG_DEBUG("access type = %s\n", snd_pcm_access_name((snd_pcm_access_t)val));
732 snd_pcm_hw_params_get_format(hwparams, &sample_spec->format);
733 AUDIO_LOG_DEBUG("format = '%s' (%s)\n",
734 snd_pcm_format_name((snd_pcm_format_t)sample_spec->format),
735 snd_pcm_format_description((snd_pcm_format_t)sample_spec->format));
737 snd_pcm_hw_params_get_subformat(hwparams, (snd_pcm_subformat_t *)&val);
738 AUDIO_LOG_DEBUG("subformat = '%s' (%s)\n",
739 snd_pcm_subformat_name((snd_pcm_subformat_t)val),
740 snd_pcm_subformat_description((snd_pcm_subformat_t)val));
742 snd_pcm_hw_params_get_channels(hwparams, &channels);
743 sample_spec->channels = (uint8_t)channels;
744 AUDIO_LOG_DEBUG("channels = %d\n", sample_spec->channels);
747 *buffer_size = _buffer_size;
750 *period_size = _period_size;
753 *use_mmap = _use_mmap;
758 return AUDIO_ERR_RESOURCE;
761 audio_return_t _pcm_set_sw_params(snd_pcm_t *pcm, snd_pcm_uframes_t avail_min, uint8_t period_event)
763 snd_pcm_sw_params_t *swparams;
764 snd_pcm_uframes_t boundary;
767 AUDIO_RETURN_VAL_IF_FAIL(pcm, AUDIO_ERR_PARAMETER);
769 snd_pcm_sw_params_alloca(&swparams);
771 if ((err = snd_pcm_sw_params_current(pcm, swparams)) < 0) {
772 AUDIO_LOG_WARN("Unable to determine current swparams: %s\n", snd_strerror(err));
775 if ((err = snd_pcm_sw_params_set_period_event(pcm, swparams, period_event)) < 0) {
776 AUDIO_LOG_WARN("Unable to disable period event: %s\n", snd_strerror(err));
779 if ((err = snd_pcm_sw_params_set_tstamp_mode(pcm, swparams, SND_PCM_TSTAMP_ENABLE)) < 0) {
780 AUDIO_LOG_WARN("Unable to enable time stamping: %s\n", snd_strerror(err));
783 if ((err = snd_pcm_sw_params_get_boundary(swparams, &boundary)) < 0) {
784 AUDIO_LOG_WARN("Unable to get boundary: %s\n", snd_strerror(err));
787 if ((err = snd_pcm_sw_params_set_stop_threshold(pcm, swparams, boundary)) < 0) {
788 AUDIO_LOG_WARN("Unable to set stop threshold: %s\n", snd_strerror(err));
791 if ((err = snd_pcm_sw_params_set_start_threshold(pcm, swparams, (snd_pcm_uframes_t) avail_min)) < 0) {
792 AUDIO_LOG_WARN("Unable to set start threshold: %s\n", snd_strerror(err));
795 if ((err = snd_pcm_sw_params_set_avail_min(pcm, swparams, avail_min)) < 0) {
796 AUDIO_LOG_WARN("snd_pcm_sw_params_set_avail_min() failed: %s", snd_strerror(err));
799 if ((err = snd_pcm_sw_params(pcm, swparams)) < 0) {
800 AUDIO_LOG_WARN("Unable to set sw params: %s\n", snd_strerror(err));