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 #ifdef __USE_TINYALSA__
33 /* Convert pcm format from pulse to alsa */
34 static const uint32_t g_format_convert_table[] = {
35 [AUDIO_SAMPLE_U8] = PCM_FORMAT_S8,
36 [AUDIO_SAMPLE_S16LE] = PCM_FORMAT_S16_LE,
37 [AUDIO_SAMPLE_S32LE] = PCM_FORMAT_S32_LE,
38 [AUDIO_SAMPLE_S24_32LE] = PCM_FORMAT_S24_LE
41 /* FIXME : To avoid build warning... */
42 int _snd_pcm_poll_descriptor(snd_pcm_t *pcm);
43 /* Convert pcm format from pulse to alsa */
44 static const uint32_t g_format_convert_table[] = {
45 [AUDIO_SAMPLE_U8] = SND_PCM_FORMAT_U8,
46 [AUDIO_SAMPLE_ALAW] = SND_PCM_FORMAT_A_LAW,
47 [AUDIO_SAMPLE_ULAW] = SND_PCM_FORMAT_MU_LAW,
48 [AUDIO_SAMPLE_S16LE] = SND_PCM_FORMAT_S16_LE,
49 [AUDIO_SAMPLE_S16BE] = SND_PCM_FORMAT_S16_BE,
50 [AUDIO_SAMPLE_FLOAT32LE] = SND_PCM_FORMAT_FLOAT_LE,
51 [AUDIO_SAMPLE_FLOAT32BE] = SND_PCM_FORMAT_FLOAT_BE,
52 [AUDIO_SAMPLE_S32LE] = SND_PCM_FORMAT_S32_LE,
53 [AUDIO_SAMPLE_S32BE] = SND_PCM_FORMAT_S32_BE,
54 [AUDIO_SAMPLE_S24LE] = SND_PCM_FORMAT_S24_3LE,
55 [AUDIO_SAMPLE_S24BE] = SND_PCM_FORMAT_S24_3BE,
56 [AUDIO_SAMPLE_S24_32LE] = SND_PCM_FORMAT_S24_LE,
57 [AUDIO_SAMPLE_S24_32BE] = SND_PCM_FORMAT_S24_BE
61 static uint32_t __convert_format(audio_sample_format_t format)
63 return g_format_convert_table[format];
66 #ifdef __USE_TINYALSA__
67 static struct pcm *__tinyalsa_open_device(audio_pcm_sample_spec_t *ss, size_t period_size, size_t period_count, uint32_t direction)
69 struct pcm *pcm = NULL;
70 struct pcm_config config;
72 AUDIO_RETURN_NULL_IF_FAIL(ss);
74 config.channels = ss->channels;
75 config.rate = ss->rate;
76 config.period_size = period_size;
77 config.period_count = period_count;
78 config.format = ss->format;
79 config.start_threshold = period_size;
80 config.stop_threshold = 0xFFFFFFFF;
81 config.silence_threshold = 0;
83 AUDIO_LOG_INFO("direction %d, channels %d, rate %d, format %d, period_size %d, period_count %d", direction, ss->channels, ss->rate, ss->format, period_size, period_count);
85 pcm = pcm_open((direction == AUDIO_DIRECTION_OUT) ? PLAYBACK_CARD_ID : CAPTURE_CARD_ID,
86 (direction == AUDIO_DIRECTION_OUT) ? PLAYBACK_PCM_DEVICE_ID : CAPTURE_PCM_DEVICE_ID,
87 (direction == AUDIO_DIRECTION_OUT) ? PCM_OUT : PCM_IN,
89 if (!pcm || !pcm_is_ready(pcm)) {
90 AUDIO_LOG_ERROR("Unable to open device (%s)", pcm_get_error(pcm));
98 static int __tinyalsa_pcm_recover(struct pcm *pcm, int err)
102 if (err == -EINTR) /* nothing to do, continue */
105 AUDIO_LOG_INFO("XRUN occurred");
106 err = pcm_prepare(pcm);
108 AUDIO_LOG_ERROR("Could not recover from XRUN occurred, prepare failed : %d", err);
113 if (err == -ESTRPIPE) {
114 /* tinyalsa does not support pcm resume, dont't care suspend case */
115 AUDIO_LOG_ERROR("Could not recover from suspend : %d", err);
122 audio_return_t _pcm_open(void **pcm_handle, uint32_t direction, void *sample_spec, uint32_t period_size, uint32_t periods)
124 #ifdef __USE_TINYALSA__
125 audio_pcm_sample_spec_t *ss;
128 ss = (audio_pcm_sample_spec_t *)sample_spec;
129 ss->format = __convert_format((audio_sample_format_t)ss->format);
131 *pcm_handle = __tinyalsa_open_device(ss, (size_t)period_size, (size_t)periods, direction);
132 if (*pcm_handle == NULL) {
133 AUDIO_LOG_ERROR("Error opening PCM device");
134 return AUDIO_ERR_RESOURCE;
137 if ((err = pcm_prepare((struct pcm *)*pcm_handle)) != 0) {
138 AUDIO_LOG_ERROR("Error prepare PCM device : %d", err);
143 char *device_name = NULL;
145 mode = SND_PCM_NONBLOCK | SND_PCM_NO_AUTO_RESAMPLE | SND_PCM_NO_AUTO_CHANNELS | SND_PCM_NO_AUTO_FORMAT;
147 if (direction == AUDIO_DIRECTION_OUT)
148 device_name = PLAYBACK_PCM_DEVICE;
149 else if (direction == AUDIO_DIRECTION_IN)
150 device_name = CAPTURE_PCM_DEVICE;
152 AUDIO_LOG_ERROR("Error get device_name, direction : %d", direction);
153 return AUDIO_ERR_RESOURCE;
156 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) {
157 AUDIO_LOG_ERROR("Error opening PCM device %s : %s", device_name, snd_strerror(err));
158 return AUDIO_ERR_RESOURCE;
161 if ((err = _pcm_set_params(*pcm_handle, direction, sample_spec, period_size, periods)) != AUDIO_RET_OK) {
162 AUDIO_LOG_ERROR("Failed to set pcm parameters : %d", err);
166 AUDIO_LOG_INFO("PCM device %s", device_name);
172 audio_return_t _pcm_start(void *pcm_handle)
176 #ifdef __USE_TINYALSA__
177 if ((err = pcm_start(pcm_handle)) < 0) {
178 AUDIO_LOG_ERROR("Error starting PCM handle : %d", err);
179 return AUDIO_ERR_RESOURCE;
182 if ((err = snd_pcm_start(pcm_handle)) < 0) {
183 AUDIO_LOG_ERROR("Error starting PCM handle : %s", snd_strerror(err));
184 return AUDIO_ERR_RESOURCE;
188 AUDIO_LOG_INFO("PCM handle 0x%x start", pcm_handle);
192 audio_return_t _pcm_stop(void *pcm_handle)
196 #ifdef __USE_TINYALSA__
197 if ((err = pcm_stop(pcm_handle)) < 0) {
198 AUDIO_LOG_ERROR("Error stopping PCM handle : %d", err);
199 return AUDIO_ERR_RESOURCE;
202 if ((err = snd_pcm_drop(pcm_handle)) < 0) {
203 AUDIO_LOG_ERROR("Error stopping PCM handle : %s", snd_strerror(err));
204 return AUDIO_ERR_RESOURCE;
208 AUDIO_LOG_INFO("PCM handle 0x%x stop", pcm_handle);
212 audio_return_t _pcm_close(void *pcm_handle)
216 AUDIO_LOG_INFO("Try to close PCM handle 0x%x", pcm_handle);
218 #ifdef __USE_TINYALSA__
219 if ((err = pcm_close(pcm_handle)) < 0) {
220 AUDIO_LOG_ERROR("Error closing PCM handle : %d", err);
221 return AUDIO_ERR_RESOURCE;
224 if ((err = snd_pcm_close(pcm_handle)) < 0) {
225 AUDIO_LOG_ERROR("Error closing PCM handle : %s", snd_strerror(err));
226 return AUDIO_ERR_RESOURCE;
233 audio_return_t _pcm_avail(void *pcm_handle, uint32_t *avail)
235 #ifdef __USE_TINYALSA__
236 struct timespec tspec;
237 unsigned int frames_avail = 0;
240 err = pcm_get_htimestamp(pcm_handle, &frames_avail, &tspec);
242 AUDIO_LOG_ERROR("Could not get avail and timespec at PCM handle 0x%x : %d", pcm_handle, err);
243 return AUDIO_ERR_IOCTL;
247 AUDIO_LOG_DEBUG("avail = %d", frames_avail);
250 *avail = (uint32_t)frames_avail;
252 snd_pcm_sframes_t frames_avail;
254 if ((frames_avail = snd_pcm_avail(pcm_handle)) < 0) {
255 AUDIO_LOG_ERROR("Could not get avail at PCM handle 0x%x : %d", pcm_handle, frames_avail);
256 return AUDIO_ERR_IOCTL;
260 AUDIO_LOG_DEBUG("avail = %d", frames_avail);
263 *avail = (uint32_t)frames_avail;
269 audio_return_t _pcm_write(void *pcm_handle, const void *buffer, uint32_t frames)
271 #ifdef __USE_TINYALSA__
274 err = pcm_write(pcm_handle, buffer, pcm_frames_to_bytes(pcm_handle, (unsigned int)frames));
276 AUDIO_LOG_ERROR("Failed to write pcm : %d", err);
277 return AUDIO_ERR_IOCTL;
281 AUDIO_LOG_DEBUG("_pcm_write = %d", frames);
284 snd_pcm_sframes_t frames_written;
286 AUDIO_RETURN_VAL_IF_FAIL(pcm_handle, AUDIO_ERR_PARAMETER);
288 frames_written = snd_pcm_writei(pcm_handle, buffer, (snd_pcm_uframes_t) frames);
289 if (frames_written < 0) {
290 AUDIO_LOG_ERROR("Failed to write pcm : %d", frames_written);
291 return AUDIO_ERR_IOCTL;
295 AUDIO_LOG_DEBUG("_pcm_write = (%d / %d)", frames_written, frames);
302 audio_return_t _pcm_read(void *pcm_handle, void *buffer, uint32_t frames)
304 #ifdef __USE_TINYALSA__
307 err = pcm_read(pcm_handle, buffer, pcm_frames_to_bytes(pcm_handle, (unsigned int)frames));
309 AUDIO_LOG_ERROR("Failed to read pcm : %d", err);
310 return AUDIO_ERR_IOCTL;
314 AUDIO_LOG_DEBUG("audio_pcm_read = %d", frames);
317 snd_pcm_sframes_t frames_read;
319 frames_read = snd_pcm_readi(pcm_handle, buffer, (snd_pcm_uframes_t)frames);
320 if (frames_read < 0) {
321 AUDIO_LOG_ERROR("Failed to read pcm : %d", frames_read);
322 return AUDIO_ERR_IOCTL;
326 AUDIO_LOG_DEBUG("_pcm_read = (%d / %d)", frames_read, frames);
333 audio_return_t _pcm_get_fd(void *pcm_handle, int *fd)
335 /* we use an internal API of the (tiny)alsa library, so it causes warning message during compile */
336 #ifdef __USE_TINYALSA__
337 *fd = _pcm_poll_descriptor((struct pcm *)pcm_handle);
339 *fd = _snd_pcm_poll_descriptor((snd_pcm_t *)pcm_handle);
344 audio_return_t _pcm_recover(void *pcm_handle, int revents)
348 AUDIO_RETURN_VAL_IF_FAIL(pcm_handle, AUDIO_ERR_PARAMETER);
350 if (revents & POLLERR)
351 AUDIO_LOG_DEBUG("Got POLLERR from ALSA");
352 if (revents & POLLNVAL)
353 AUDIO_LOG_DEBUG("Got POLLNVAL from ALSA");
354 if (revents & POLLHUP)
355 AUDIO_LOG_DEBUG("Got POLLHUP from ALSA");
356 if (revents & POLLPRI)
357 AUDIO_LOG_DEBUG("Got POLLPRI from ALSA");
358 if (revents & POLLIN)
359 AUDIO_LOG_DEBUG("Got POLLIN from ALSA");
360 if (revents & POLLOUT)
361 AUDIO_LOG_DEBUG("Got POLLOUT from ALSA");
363 #ifdef __USE_TINYALSA__
364 state = pcm_state(pcm_handle);
365 AUDIO_LOG_DEBUG("PCM state is %d", state);
369 if ((err = __tinyalsa_pcm_recover(pcm_handle, -EPIPE)) != 0) {
370 AUDIO_LOG_ERROR("Could not recover from POLLERR|POLLNVAL|POLLHUP and XRUN : %d", err);
371 return AUDIO_ERR_IOCTL;
375 case PCM_STATE_SUSPENDED:
376 if ((err = __tinyalsa_pcm_recover(pcm_handle, -ESTRPIPE)) != 0) {
377 AUDIO_LOG_ERROR("Could not recover from POLLERR|POLLNVAL|POLLHUP and SUSPENDED : %d", err);
378 return AUDIO_ERR_IOCTL;
383 pcm_stop(pcm_handle);
384 if ((err = pcm_prepare(pcm_handle)) < 0) {
385 AUDIO_LOG_ERROR("Could not recover from POLLERR|POLLNVAL|POLLHUP with pcm_prepare() : %d", err);
386 return AUDIO_ERR_IOCTL;
390 state = snd_pcm_state(pcm_handle);
391 AUDIO_LOG_DEBUG("PCM state is %s", snd_pcm_state_name(state));
393 /* Try to recover from this error */
396 case SND_PCM_STATE_XRUN:
397 if ((err = snd_pcm_recover(pcm_handle, -EPIPE, 1)) != 0) {
398 AUDIO_LOG_ERROR("Could not recover from POLLERR|POLLNVAL|POLLHUP and XRUN : %d", err);
399 return AUDIO_ERR_IOCTL;
403 case SND_PCM_STATE_SUSPENDED:
404 if ((err = snd_pcm_recover(pcm_handle, -ESTRPIPE, 1)) != 0) {
405 AUDIO_LOG_ERROR("Could not recover from POLLERR|POLLNVAL|POLLHUP and SUSPENDED : %d", err);
406 return AUDIO_ERR_IOCTL;
411 snd_pcm_drop(pcm_handle);
412 if ((err = snd_pcm_prepare(pcm_handle)) < 0) {
413 AUDIO_LOG_ERROR("Could not recover from POLLERR|POLLNVAL|POLLHUP with snd_pcm_prepare() : %d", err);
414 return AUDIO_ERR_IOCTL;
420 AUDIO_LOG_DEBUG("_pcm_recover");
424 audio_return_t _pcm_get_params(void *pcm_handle, uint32_t direction, void **sample_spec, uint32_t *period_size, uint32_t *periods)
426 #ifdef __USE_TINYALSA__
427 audio_pcm_sample_spec_t *ss;
428 unsigned int _period_size, _buffer_size, _periods, _format, _rate, _channels;
429 unsigned int _start_threshold, _stop_threshold, _silence_threshold;
430 struct pcm_config *config;
432 ss = (audio_pcm_sample_spec_t *)*sample_spec;
434 /* we use an internal API of the tiny alsa library, so it causes warning message during compile */
435 _pcm_config(pcm_handle, &config);
437 *period_size = config->period_size;
438 *periods = config->period_count;
439 _buffer_size = config->period_size * config->period_count;
440 ss->format = config->format;
441 ss->rate = config->rate;
442 ss->channels = config->channels;
443 _start_threshold = config->start_threshold;
444 _stop_threshold = config->stop_threshold;
445 _silence_threshold = config->silence_threshold;
447 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);
450 audio_pcm_sample_spec_t *ss;
452 snd_pcm_uframes_t _period_size, _buffer_size;
453 snd_pcm_format_t _format;
454 unsigned int _rate, _channels;
455 snd_pcm_uframes_t _start_threshold, _stop_threshold, _silence_threshold, _avail_min;
456 unsigned int _periods;
457 snd_pcm_hw_params_t *hwparams;
458 snd_pcm_sw_params_t *swparams;
460 ss = (audio_pcm_sample_spec_t *)*sample_spec;
462 snd_pcm_hw_params_alloca(&hwparams);
463 snd_pcm_sw_params_alloca(&swparams);
465 if ((err = snd_pcm_hw_params_current(pcm_handle, hwparams)) < 0) {
466 AUDIO_LOG_ERROR("snd_pcm_hw_params_current() failed : %d", err);
467 return AUDIO_ERR_PARAMETER;
470 if ((err = snd_pcm_hw_params_get_period_size(hwparams, &_period_size, &dir)) < 0 ||
471 (err = snd_pcm_hw_params_get_buffer_size(hwparams, &_buffer_size)) < 0 ||
472 (err = snd_pcm_hw_params_get_periods(hwparams, &_periods, &dir)) < 0 ||
473 (err = snd_pcm_hw_params_get_format(hwparams, &_format)) < 0 ||
474 (err = snd_pcm_hw_params_get_rate(hwparams, &_rate, &dir)) < 0 ||
475 (err = snd_pcm_hw_params_get_channels(hwparams, &_channels)) < 0) {
476 AUDIO_LOG_ERROR("snd_pcm_hw_params_get_{period_size|buffer_size|periods|format|rate|channels}() failed : %s", err);
477 return AUDIO_ERR_PARAMETER;
480 *period_size = _period_size;
482 ss->format = _format;
484 ss->channels = _channels;
486 if ((err = snd_pcm_sw_params_current(pcm_handle, swparams)) < 0) {
487 AUDIO_LOG_ERROR("snd_pcm_sw_params_current() failed : %d", err);
488 return AUDIO_ERR_PARAMETER;
491 if ((err = snd_pcm_sw_params_get_start_threshold(swparams, &_start_threshold)) < 0 ||
492 (err = snd_pcm_sw_params_get_stop_threshold(swparams, &_stop_threshold)) < 0 ||
493 (err = snd_pcm_sw_params_get_silence_threshold(swparams, &_silence_threshold)) < 0 ||
494 (err = snd_pcm_sw_params_get_avail_min(swparams, &_avail_min)) < 0) {
495 AUDIO_LOG_ERROR("snd_pcm_sw_params_get_{start_threshold|stop_threshold|silence_threshold|avail_min}() failed : %s", err);
498 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);
504 audio_return_t _pcm_set_params(void *pcm_handle, uint32_t direction, void *sample_spec, uint32_t period_size, uint32_t periods)
506 #ifdef __USE_TINYALSA__
507 /* Parameters are only acceptable in pcm_open() function */
508 AUDIO_LOG_DEBUG("_pcm_set_params");
511 audio_pcm_sample_spec_t ss;
512 snd_pcm_uframes_t _buffer_size;
513 snd_pcm_hw_params_t *hwparams;
514 snd_pcm_sw_params_t *swparams;
516 ss = *(audio_pcm_sample_spec_t *)sample_spec;
518 snd_pcm_hw_params_alloca(&hwparams);
519 snd_pcm_sw_params_alloca(&swparams);
522 if ((err = snd_pcm_hw_params_any(pcm_handle, hwparams)) < 0) {
523 AUDIO_LOG_ERROR("snd_pcm_hw_params_any() failed : %d", err);
524 return AUDIO_ERR_PARAMETER;
527 if ((err = snd_pcm_hw_params_set_rate_resample(pcm_handle, hwparams, 0)) < 0) {
528 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_rate_resample() failed : %d", err);
529 return AUDIO_ERR_PARAMETER;
532 if ((err = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
533 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_access() failed : %d", err);
534 return AUDIO_ERR_PARAMETER;
537 ss.format = __convert_format((audio_sample_format_t)ss.format);
538 if ((err = snd_pcm_hw_params_set_format(pcm_handle, hwparams, ss.format)) < 0) {
539 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_format() failed : %d", err);
540 return AUDIO_ERR_PARAMETER;
543 if ((err = snd_pcm_hw_params_set_rate(pcm_handle, hwparams, ss.rate, 0)) < 0) {
544 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_rate() failed : %d", err);
545 return AUDIO_ERR_PARAMETER;
548 if ((err = snd_pcm_hw_params_set_channels(pcm_handle, hwparams, ss.channels)) < 0) {
549 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_channels(%u) failed : %d", err);
550 return AUDIO_ERR_PARAMETER;
553 if ((err = snd_pcm_hw_params_set_period_size(pcm_handle, hwparams, period_size, 0)) < 0) {
554 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_period_size(%u) failed : %d", err);
555 return AUDIO_ERR_PARAMETER;
558 if ((err = snd_pcm_hw_params_set_periods(pcm_handle, hwparams, periods, 0)) < 0) {
559 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_periods(%u) failed : %d", periods, err);
560 return AUDIO_ERR_PARAMETER;
563 _buffer_size = period_size * periods;
564 if ((err = snd_pcm_hw_params_set_buffer_size(pcm_handle, hwparams, _buffer_size)) < 0) {
565 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_buffer_size(%u) failed : %d", periods * periods, err);
566 return AUDIO_ERR_PARAMETER;
569 if ((err = snd_pcm_hw_params(pcm_handle, hwparams)) < 0) {
570 AUDIO_LOG_ERROR("snd_pcm_hw_params failed : %d", err);
571 return AUDIO_ERR_IOCTL;
575 if ((err = snd_pcm_sw_params_current(pcm_handle, swparams)) < 0) {
576 AUDIO_LOG_ERROR("Unable to determine current swparams : %d", err);
577 return AUDIO_ERR_PARAMETER;
580 if ((err = snd_pcm_sw_params_set_tstamp_mode(pcm_handle, swparams, SND_PCM_TSTAMP_ENABLE)) < 0) {
581 AUDIO_LOG_ERROR("Unable to enable time stamping : %d", err);
582 return AUDIO_ERR_PARAMETER;
585 if ((err = snd_pcm_sw_params_set_stop_threshold(pcm_handle, swparams, 0xFFFFFFFF)) < 0) {
586 AUDIO_LOG_ERROR("Unable to set stop threshold : %d", err);
587 return AUDIO_ERR_PARAMETER;
590 if ((err = snd_pcm_sw_params_set_start_threshold(pcm_handle, swparams, period_size / 2)) < 0) {
591 AUDIO_LOG_ERROR("Unable to set start threshold : %d", err);
592 return AUDIO_ERR_PARAMETER;
595 if ((err = snd_pcm_sw_params_set_avail_min(pcm_handle, swparams, 1024)) < 0) {
596 AUDIO_LOG_ERROR("snd_pcm_sw_params_set_avail_min() failed : %d", err);
597 return AUDIO_ERR_PARAMETER;
600 if ((err = snd_pcm_sw_params(pcm_handle, swparams)) < 0) {
601 AUDIO_LOG_ERROR("Unable to set sw params : %d", err);
602 return AUDIO_ERR_IOCTL;
606 if ((err = snd_pcm_prepare(pcm_handle)) < 0) {
607 AUDIO_LOG_ERROR("snd_pcm_prepare() failed : %d", err);
608 return AUDIO_ERR_IOCTL;
611 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);
617 /* Generic snd pcm interface APIs */
618 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)
620 audio_return_t ret = AUDIO_RET_OK;
621 snd_pcm_hw_params_t *hwparams;
624 unsigned int val = 0;
625 snd_pcm_uframes_t _period_size = period_size ? *period_size : 0;
626 snd_pcm_uframes_t _buffer_size = buffer_size ? *buffer_size : 0;
627 uint8_t _use_mmap = use_mmap && *use_mmap;
628 uint32_t channels = 0;
630 AUDIO_RETURN_VAL_IF_FAIL(pcm, AUDIO_ERR_PARAMETER);
632 snd_pcm_hw_params_alloca(&hwparams);
634 /* Skip parameter setting to null device. */
635 if (snd_pcm_type(pcm) == SND_PCM_TYPE_NULL)
636 return AUDIO_ERR_IOCTL;
638 /* Allocate a hardware parameters object. */
639 snd_pcm_hw_params_alloca(&hwparams);
641 /* Fill it in with default values. */
642 if (snd_pcm_hw_params_any(pcm, hwparams) < 0) {
643 AUDIO_LOG_ERROR("snd_pcm_hw_params_any() : failed! - %s\n", snd_strerror(err));
647 /* Set the desired hardware parameters. */
651 if (snd_pcm_hw_params_set_access(pcm, hwparams, SND_PCM_ACCESS_MMAP_INTERLEAVED) < 0) {
653 /* mmap() didn't work, fall back to interleaved */
655 if ((ret = snd_pcm_hw_params_set_access(pcm, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
656 AUDIO_LOG_DEBUG("snd_pcm_hw_params_set_access() failed: %s", snd_strerror(ret));
663 } else if ((ret = snd_pcm_hw_params_set_access(pcm, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
664 AUDIO_LOG_DEBUG("snd_pcm_hw_params_set_access() failed: %s", snd_strerror(ret));
667 AUDIO_LOG_DEBUG("setting rate - %d", sample_spec->rate);
668 err = snd_pcm_hw_params_set_rate(pcm, hwparams, sample_spec->rate, 0);
670 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_rate() : failed! - %s\n", snd_strerror(err));
673 err = snd_pcm_hw_params(pcm, hwparams);
675 AUDIO_LOG_ERROR("snd_pcm_hw_params() : failed! - %s\n", snd_strerror(err));
679 /* Dump current param */
681 if ((ret = snd_pcm_hw_params_current(pcm, hwparams)) < 0) {
682 AUDIO_LOG_INFO("snd_pcm_hw_params_current() failed: %s", snd_strerror(ret));
686 if ((ret = snd_pcm_hw_params_get_period_size(hwparams, &_period_size, &dir)) < 0 ||
687 (ret = snd_pcm_hw_params_get_buffer_size(hwparams, &_buffer_size)) < 0) {
688 AUDIO_LOG_INFO("snd_pcm_hw_params_get_{period|buffer}_size() failed: %s", snd_strerror(ret));
692 snd_pcm_hw_params_get_access(hwparams, (snd_pcm_access_t *) &val);
693 AUDIO_LOG_DEBUG("access type = %s\n", snd_pcm_access_name((snd_pcm_access_t)val));
695 snd_pcm_hw_params_get_format(hwparams, &sample_spec->format);
696 AUDIO_LOG_DEBUG("format = '%s' (%s)\n",
697 snd_pcm_format_name((snd_pcm_format_t)sample_spec->format),
698 snd_pcm_format_description((snd_pcm_format_t)sample_spec->format));
700 snd_pcm_hw_params_get_subformat(hwparams, (snd_pcm_subformat_t *)&val);
701 AUDIO_LOG_DEBUG("subformat = '%s' (%s)\n",
702 snd_pcm_subformat_name((snd_pcm_subformat_t)val),
703 snd_pcm_subformat_description((snd_pcm_subformat_t)val));
705 snd_pcm_hw_params_get_channels(hwparams, &channels);
706 sample_spec->channels = (uint8_t)channels;
707 AUDIO_LOG_DEBUG("channels = %d\n", sample_spec->channels);
710 *buffer_size = _buffer_size;
713 *period_size = _period_size;
716 *use_mmap = _use_mmap;
721 return AUDIO_ERR_RESOURCE;
724 audio_return_t _pcm_set_sw_params(snd_pcm_t *pcm, snd_pcm_uframes_t avail_min, uint8_t period_event)
726 snd_pcm_sw_params_t *swparams;
727 snd_pcm_uframes_t boundary;
730 AUDIO_RETURN_VAL_IF_FAIL(pcm, AUDIO_ERR_PARAMETER);
732 snd_pcm_sw_params_alloca(&swparams);
734 if ((err = snd_pcm_sw_params_current(pcm, swparams)) < 0) {
735 AUDIO_LOG_WARN("Unable to determine current swparams: %s\n", snd_strerror(err));
738 if ((err = snd_pcm_sw_params_set_period_event(pcm, swparams, period_event)) < 0) {
739 AUDIO_LOG_WARN("Unable to disable period event: %s\n", snd_strerror(err));
742 if ((err = snd_pcm_sw_params_set_tstamp_mode(pcm, swparams, SND_PCM_TSTAMP_ENABLE)) < 0) {
743 AUDIO_LOG_WARN("Unable to enable time stamping: %s\n", snd_strerror(err));
746 if ((err = snd_pcm_sw_params_get_boundary(swparams, &boundary)) < 0) {
747 AUDIO_LOG_WARN("Unable to get boundary: %s\n", snd_strerror(err));
750 if ((err = snd_pcm_sw_params_set_stop_threshold(pcm, swparams, boundary)) < 0) {
751 AUDIO_LOG_WARN("Unable to set stop threshold: %s\n", snd_strerror(err));
754 if ((err = snd_pcm_sw_params_set_start_threshold(pcm, swparams, (snd_pcm_uframes_t) avail_min)) < 0) {
755 AUDIO_LOG_WARN("Unable to set start threshold: %s\n", snd_strerror(err));
758 if ((err = snd_pcm_sw_params_set_avail_min(pcm, swparams, avail_min)) < 0) {
759 AUDIO_LOG_WARN("snd_pcm_sw_params_set_avail_min() failed: %s", snd_strerror(err));
762 if ((err = snd_pcm_sw_params(pcm, swparams)) < 0) {
763 AUDIO_LOG_WARN("Unable to set sw params: %s\n", snd_strerror(err));