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 /* #define DEBUG_TIMING */
68 #ifdef __USE_TINYALSA__
69 static struct pcm *__tinyalsa_open_device(audio_pcm_sample_spec_t *ss, size_t period_size, size_t period_count, uint32_t direction)
71 struct pcm *pcm = NULL;
72 struct pcm_config config;
74 AUDIO_RETURN_NULL_IF_FAIL(ss);
76 config.channels = ss->channels;
77 config.rate = ss->rate;
78 config.period_size = period_size;
79 config.period_count = period_count;
80 config.format = ss->format;
81 config.start_threshold = period_size;
82 config.stop_threshold = 0xFFFFFFFF;
83 config.silence_threshold = 0;
85 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);
87 pcm = pcm_open((direction == AUDIO_DIRECTION_OUT) ? PLAYBACK_CARD_ID : CAPTURE_CARD_ID,
88 (direction == AUDIO_DIRECTION_OUT) ? PLAYBACK_PCM_DEVICE_ID : CAPTURE_PCM_DEVICE_ID,
89 (direction == AUDIO_DIRECTION_OUT) ? PCM_OUT : PCM_IN,
91 if (!pcm || !pcm_is_ready(pcm)) {
92 AUDIO_LOG_ERROR("Unable to open device (%s)", pcm_get_error(pcm));
100 static int __tinyalsa_pcm_recover(struct pcm *pcm, int err)
104 if (err == -EINTR) /* nothing to do, continue */
107 AUDIO_LOG_INFO("XRUN occurred");
108 err = pcm_prepare(pcm);
110 AUDIO_LOG_ERROR("Could not recover from XRUN occurred, prepare failed : %d", err);
115 if (err == -ESTRPIPE) {
116 /* tinyalsa does not support pcm resume, dont't care suspend case */
117 AUDIO_LOG_ERROR("Could not recover from suspend : %d", err);
124 audio_return_t _pcm_open(void **pcm_handle, uint32_t direction, void *sample_spec, uint32_t period_size, uint32_t periods)
126 #ifdef __USE_TINYALSA__
127 audio_pcm_sample_spec_t *ss;
130 ss = (audio_pcm_sample_spec_t *)sample_spec;
131 ss->format = __convert_format((audio_sample_format_t)ss->format);
133 *pcm_handle = __tinyalsa_open_device(ss, (size_t)period_size, (size_t)periods, direction);
134 if (*pcm_handle == NULL) {
135 AUDIO_LOG_ERROR("Error opening PCM device");
136 return AUDIO_ERR_RESOURCE;
139 if ((err = pcm_prepare((struct pcm *)*pcm_handle)) != 0) {
140 AUDIO_LOG_ERROR("Error prepare PCM device : %d", err);
145 char *device_name = NULL;
147 mode = SND_PCM_NONBLOCK | SND_PCM_NO_AUTO_RESAMPLE | SND_PCM_NO_AUTO_CHANNELS | SND_PCM_NO_AUTO_FORMAT;
149 if (direction == AUDIO_DIRECTION_OUT)
150 device_name = PLAYBACK_PCM_DEVICE;
151 else if (direction == AUDIO_DIRECTION_IN)
152 device_name = CAPTURE_PCM_DEVICE;
154 AUDIO_LOG_ERROR("Error get device_name, direction : %d", direction);
155 return AUDIO_ERR_RESOURCE;
158 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) {
159 AUDIO_LOG_ERROR("Error opening PCM device %s : %s", device_name, snd_strerror(err));
160 return AUDIO_ERR_RESOURCE;
163 if ((err = _pcm_set_params(*pcm_handle, direction, sample_spec, period_size, periods)) != AUDIO_RET_OK) {
164 AUDIO_LOG_ERROR("Failed to set pcm parameters : %d", err);
168 AUDIO_LOG_INFO("PCM device %s", device_name);
174 audio_return_t _pcm_start(void *pcm_handle)
178 #ifdef __USE_TINYALSA__
179 if ((err = pcm_start(pcm_handle)) < 0) {
180 AUDIO_LOG_ERROR("Error starting PCM handle : %d", err);
181 return AUDIO_ERR_RESOURCE;
184 if ((err = snd_pcm_start(pcm_handle)) < 0) {
185 AUDIO_LOG_ERROR("Error starting PCM handle : %s", snd_strerror(err));
186 return AUDIO_ERR_RESOURCE;
190 AUDIO_LOG_INFO("PCM handle 0x%x start", pcm_handle);
194 audio_return_t _pcm_stop(void *pcm_handle)
198 #ifdef __USE_TINYALSA__
199 if ((err = pcm_stop(pcm_handle)) < 0) {
200 AUDIO_LOG_ERROR("Error stopping PCM handle : %d", err);
201 return AUDIO_ERR_RESOURCE;
204 if ((err = snd_pcm_drop(pcm_handle)) < 0) {
205 AUDIO_LOG_ERROR("Error stopping PCM handle : %s", snd_strerror(err));
206 return AUDIO_ERR_RESOURCE;
210 AUDIO_LOG_INFO("PCM handle 0x%x stop", pcm_handle);
214 audio_return_t _pcm_close(void *pcm_handle)
218 AUDIO_LOG_INFO("Try to close PCM handle 0x%x", pcm_handle);
220 #ifdef __USE_TINYALSA__
221 if ((err = pcm_close(pcm_handle)) < 0) {
222 AUDIO_LOG_ERROR("Error closing PCM handle : %d", err);
223 return AUDIO_ERR_RESOURCE;
226 if ((err = snd_pcm_close(pcm_handle)) < 0) {
227 AUDIO_LOG_ERROR("Error closing PCM handle : %s", snd_strerror(err));
228 return AUDIO_ERR_RESOURCE;
235 audio_return_t _pcm_avail(void *pcm_handle, uint32_t *avail)
237 #ifdef __USE_TINYALSA__
238 struct timespec tspec;
239 unsigned int frames_avail = 0;
242 err = pcm_get_htimestamp(pcm_handle, &frames_avail, &tspec);
244 AUDIO_LOG_ERROR("Could not get avail and timespec at PCM handle 0x%x : %d", pcm_handle, err);
245 return AUDIO_ERR_IOCTL;
249 AUDIO_LOG_DEBUG("avail = %d", frames_avail);
252 *avail = (uint32_t)frames_avail;
254 snd_pcm_sframes_t frames_avail;
256 if ((frames_avail = snd_pcm_avail(pcm_handle)) < 0) {
257 AUDIO_LOG_ERROR("Could not get avail at PCM handle 0x%x : %d", pcm_handle, frames_avail);
258 return AUDIO_ERR_IOCTL;
262 AUDIO_LOG_DEBUG("avail = %d", frames_avail);
265 *avail = (uint32_t)frames_avail;
271 audio_return_t _pcm_write(void *pcm_handle, const void *buffer, uint32_t frames)
273 #ifdef __USE_TINYALSA__
276 err = pcm_write(pcm_handle, buffer, pcm_frames_to_bytes(pcm_handle, (unsigned int)frames));
278 AUDIO_LOG_ERROR("Failed to write pcm : %d", err);
279 return AUDIO_ERR_IOCTL;
283 AUDIO_LOG_DEBUG("_pcm_write = %d", frames);
286 snd_pcm_sframes_t frames_written;
288 AUDIO_RETURN_VAL_IF_FAIL(pcm_handle, AUDIO_ERR_PARAMETER);
290 frames_written = snd_pcm_writei(pcm_handle, buffer, (snd_pcm_uframes_t) frames);
291 if (frames_written < 0) {
292 AUDIO_LOG_ERROR("Failed to write pcm : %d", frames_written);
293 return AUDIO_ERR_IOCTL;
297 AUDIO_LOG_DEBUG("_pcm_write = (%d / %d)", frames_written, frames);
304 audio_return_t _pcm_read(void *pcm_handle, void *buffer, uint32_t frames)
306 #ifdef __USE_TINYALSA__
309 err = pcm_read(pcm_handle, buffer, pcm_frames_to_bytes(pcm_handle, (unsigned int)frames));
311 AUDIO_LOG_ERROR("Failed to read pcm : %d", err);
312 return AUDIO_ERR_IOCTL;
316 AUDIO_LOG_DEBUG("audio_pcm_read = %d", frames);
319 snd_pcm_sframes_t frames_read;
321 frames_read = snd_pcm_readi(pcm_handle, buffer, (snd_pcm_uframes_t)frames);
322 if (frames_read < 0) {
323 AUDIO_LOG_ERROR("Failed to read pcm : %d", frames_read);
324 return AUDIO_ERR_IOCTL;
328 AUDIO_LOG_DEBUG("_pcm_read = (%d / %d)", frames_read, frames);
335 audio_return_t _pcm_get_fd(void *pcm_handle, int *fd)
337 /* we use an internal API of the (tiny)alsa library, so it causes warning message during compile */
338 #ifdef __USE_TINYALSA__
339 *fd = _pcm_poll_descriptor((struct pcm *)pcm_handle);
341 *fd = _snd_pcm_poll_descriptor((snd_pcm_t *)pcm_handle);
346 audio_return_t _pcm_recover(void *pcm_handle, int revents)
350 AUDIO_RETURN_VAL_IF_FAIL(pcm_handle, AUDIO_ERR_PARAMETER);
352 if (revents & POLLERR)
353 AUDIO_LOG_DEBUG("Got POLLERR from ALSA");
354 if (revents & POLLNVAL)
355 AUDIO_LOG_DEBUG("Got POLLNVAL from ALSA");
356 if (revents & POLLHUP)
357 AUDIO_LOG_DEBUG("Got POLLHUP from ALSA");
358 if (revents & POLLPRI)
359 AUDIO_LOG_DEBUG("Got POLLPRI from ALSA");
360 if (revents & POLLIN)
361 AUDIO_LOG_DEBUG("Got POLLIN from ALSA");
362 if (revents & POLLOUT)
363 AUDIO_LOG_DEBUG("Got POLLOUT from ALSA");
365 #ifdef __USE_TINYALSA__
366 state = pcm_state(pcm_handle);
367 AUDIO_LOG_DEBUG("PCM state is %d", state);
371 if ((err = __tinyalsa_pcm_recover(pcm_handle, -EPIPE)) != 0) {
372 AUDIO_LOG_ERROR("Could not recover from POLLERR|POLLNVAL|POLLHUP and XRUN : %d", err);
373 return AUDIO_ERR_IOCTL;
377 case PCM_STATE_SUSPENDED:
378 if ((err = __tinyalsa_pcm_recover(pcm_handle, -ESTRPIPE)) != 0) {
379 AUDIO_LOG_ERROR("Could not recover from POLLERR|POLLNVAL|POLLHUP and SUSPENDED : %d", err);
380 return AUDIO_ERR_IOCTL;
385 pcm_stop(pcm_handle);
386 if ((err = pcm_prepare(pcm_handle)) < 0) {
387 AUDIO_LOG_ERROR("Could not recover from POLLERR|POLLNVAL|POLLHUP with pcm_prepare() : %d", err);
388 return AUDIO_ERR_IOCTL;
392 state = snd_pcm_state(pcm_handle);
393 AUDIO_LOG_DEBUG("PCM state is %s", snd_pcm_state_name(state));
395 /* Try to recover from this error */
398 case SND_PCM_STATE_XRUN:
399 if ((err = snd_pcm_recover(pcm_handle, -EPIPE, 1)) != 0) {
400 AUDIO_LOG_ERROR("Could not recover from POLLERR|POLLNVAL|POLLHUP and XRUN : %d", err);
401 return AUDIO_ERR_IOCTL;
405 case SND_PCM_STATE_SUSPENDED:
406 if ((err = snd_pcm_recover(pcm_handle, -ESTRPIPE, 1)) != 0) {
407 AUDIO_LOG_ERROR("Could not recover from POLLERR|POLLNVAL|POLLHUP and SUSPENDED : %d", err);
408 return AUDIO_ERR_IOCTL;
413 snd_pcm_drop(pcm_handle);
414 if ((err = snd_pcm_prepare(pcm_handle)) < 0) {
415 AUDIO_LOG_ERROR("Could not recover from POLLERR|POLLNVAL|POLLHUP with snd_pcm_prepare() : %d", err);
416 return AUDIO_ERR_IOCTL;
422 AUDIO_LOG_DEBUG("_pcm_recover");
426 audio_return_t _pcm_get_params(void *pcm_handle, uint32_t direction, void **sample_spec, uint32_t *period_size, uint32_t *periods)
428 #ifdef __USE_TINYALSA__
429 audio_pcm_sample_spec_t *ss;
430 unsigned int _period_size, _buffer_size, _periods, _format, _rate, _channels;
431 unsigned int _start_threshold, _stop_threshold, _silence_threshold;
432 struct pcm_config *config;
434 ss = (audio_pcm_sample_spec_t *)*sample_spec;
436 /* we use an internal API of the tiny alsa library, so it causes warning message during compile */
437 _pcm_config(pcm_handle, &config);
439 *period_size = config->period_size;
440 *periods = config->period_count;
441 _buffer_size = config->period_size * config->period_count;
442 ss->format = config->format;
443 ss->rate = config->rate;
444 ss->channels = config->channels;
445 _start_threshold = config->start_threshold;
446 _stop_threshold = config->stop_threshold;
447 _silence_threshold = config->silence_threshold;
449 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);
452 audio_pcm_sample_spec_t *ss;
454 snd_pcm_uframes_t _period_size, _buffer_size;
455 snd_pcm_format_t _format;
456 unsigned int _rate, _channels;
457 snd_pcm_uframes_t _start_threshold, _stop_threshold, _silence_threshold, _avail_min;
458 unsigned int _periods;
459 snd_pcm_hw_params_t *hwparams;
460 snd_pcm_sw_params_t *swparams;
462 ss = (audio_pcm_sample_spec_t *)*sample_spec;
464 snd_pcm_hw_params_alloca(&hwparams);
465 snd_pcm_sw_params_alloca(&swparams);
467 if ((err = snd_pcm_hw_params_current(pcm_handle, hwparams)) < 0) {
468 AUDIO_LOG_ERROR("snd_pcm_hw_params_current() failed : %d", err);
469 return AUDIO_ERR_PARAMETER;
472 if ((err = snd_pcm_hw_params_get_period_size(hwparams, &_period_size, &dir)) < 0 ||
473 (err = snd_pcm_hw_params_get_buffer_size(hwparams, &_buffer_size)) < 0 ||
474 (err = snd_pcm_hw_params_get_periods(hwparams, &_periods, &dir)) < 0 ||
475 (err = snd_pcm_hw_params_get_format(hwparams, &_format)) < 0 ||
476 (err = snd_pcm_hw_params_get_rate(hwparams, &_rate, &dir)) < 0 ||
477 (err = snd_pcm_hw_params_get_channels(hwparams, &_channels)) < 0) {
478 AUDIO_LOG_ERROR("snd_pcm_hw_params_get_{period_size|buffer_size|periods|format|rate|channels}() failed : %s", err);
479 return AUDIO_ERR_PARAMETER;
482 *period_size = _period_size;
484 ss->format = _format;
486 ss->channels = _channels;
488 if ((err = snd_pcm_sw_params_current(pcm_handle, swparams)) < 0) {
489 AUDIO_LOG_ERROR("snd_pcm_sw_params_current() failed : %d", err);
490 return AUDIO_ERR_PARAMETER;
493 if ((err = snd_pcm_sw_params_get_start_threshold(swparams, &_start_threshold)) < 0 ||
494 (err = snd_pcm_sw_params_get_stop_threshold(swparams, &_stop_threshold)) < 0 ||
495 (err = snd_pcm_sw_params_get_silence_threshold(swparams, &_silence_threshold)) < 0 ||
496 (err = snd_pcm_sw_params_get_avail_min(swparams, &_avail_min)) < 0) {
497 AUDIO_LOG_ERROR("snd_pcm_sw_params_get_{start_threshold|stop_threshold|silence_threshold|avail_min}() failed : %s", err);
500 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);
506 audio_return_t _pcm_set_params(void *pcm_handle, uint32_t direction, void *sample_spec, uint32_t period_size, uint32_t periods)
508 #ifdef __USE_TINYALSA__
509 /* Parameters are only acceptable in pcm_open() function */
510 AUDIO_LOG_DEBUG("_pcm_set_params");
513 audio_pcm_sample_spec_t ss;
514 snd_pcm_uframes_t _buffer_size;
515 snd_pcm_hw_params_t *hwparams;
516 snd_pcm_sw_params_t *swparams;
518 ss = *(audio_pcm_sample_spec_t *)sample_spec;
520 snd_pcm_hw_params_alloca(&hwparams);
521 snd_pcm_sw_params_alloca(&swparams);
524 if ((err = snd_pcm_hw_params_any(pcm_handle, hwparams)) < 0) {
525 AUDIO_LOG_ERROR("snd_pcm_hw_params_any() failed : %d", err);
526 return AUDIO_ERR_PARAMETER;
529 if ((err = snd_pcm_hw_params_set_rate_resample(pcm_handle, hwparams, 0)) < 0) {
530 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_rate_resample() failed : %d", err);
531 return AUDIO_ERR_PARAMETER;
534 if ((err = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
535 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_access() failed : %d", err);
536 return AUDIO_ERR_PARAMETER;
539 ss.format = __convert_format((audio_sample_format_t)ss.format);
540 if ((err = snd_pcm_hw_params_set_format(pcm_handle, hwparams, ss.format)) < 0) {
541 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_format() failed : %d", err);
542 return AUDIO_ERR_PARAMETER;
545 if ((err = snd_pcm_hw_params_set_rate(pcm_handle, hwparams, ss.rate, 0)) < 0) {
546 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_rate() failed : %d", err);
547 return AUDIO_ERR_PARAMETER;
550 if ((err = snd_pcm_hw_params_set_channels(pcm_handle, hwparams, ss.channels)) < 0) {
551 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_channels(%u) failed : %d", err);
552 return AUDIO_ERR_PARAMETER;
555 if ((err = snd_pcm_hw_params_set_period_size(pcm_handle, hwparams, period_size, 0)) < 0) {
556 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_period_size(%u) failed : %d", err);
557 return AUDIO_ERR_PARAMETER;
560 if ((err = snd_pcm_hw_params_set_periods(pcm_handle, hwparams, periods, 0)) < 0) {
561 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_periods(%u) failed : %d", periods, err);
562 return AUDIO_ERR_PARAMETER;
565 _buffer_size = period_size * periods;
566 if ((err = snd_pcm_hw_params_set_buffer_size(pcm_handle, hwparams, _buffer_size)) < 0) {
567 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_buffer_size(%u) failed : %d", periods * periods, err);
568 return AUDIO_ERR_PARAMETER;
571 if ((err = snd_pcm_hw_params(pcm_handle, hwparams)) < 0) {
572 AUDIO_LOG_ERROR("snd_pcm_hw_params failed : %d", err);
573 return AUDIO_ERR_IOCTL;
577 if ((err = snd_pcm_sw_params_current(pcm_handle, swparams)) < 0) {
578 AUDIO_LOG_ERROR("Unable to determine current swparams : %d", err);
579 return AUDIO_ERR_PARAMETER;
582 if ((err = snd_pcm_sw_params_set_tstamp_mode(pcm_handle, swparams, SND_PCM_TSTAMP_ENABLE)) < 0) {
583 AUDIO_LOG_ERROR("Unable to enable time stamping : %d", err);
584 return AUDIO_ERR_PARAMETER;
587 if ((err = snd_pcm_sw_params_set_stop_threshold(pcm_handle, swparams, 0xFFFFFFFF)) < 0) {
588 AUDIO_LOG_ERROR("Unable to set stop threshold : %d", err);
589 return AUDIO_ERR_PARAMETER;
592 if ((err = snd_pcm_sw_params_set_start_threshold(pcm_handle, swparams, period_size / 2)) < 0) {
593 AUDIO_LOG_ERROR("Unable to set start threshold : %d", err);
594 return AUDIO_ERR_PARAMETER;
597 if ((err = snd_pcm_sw_params_set_avail_min(pcm_handle, swparams, 1024)) < 0) {
598 AUDIO_LOG_ERROR("snd_pcm_sw_params_set_avail_min() failed : %d", err);
599 return AUDIO_ERR_PARAMETER;
602 if ((err = snd_pcm_sw_params(pcm_handle, swparams)) < 0) {
603 AUDIO_LOG_ERROR("Unable to set sw params : %d", err);
604 return AUDIO_ERR_IOCTL;
608 if ((err = snd_pcm_prepare(pcm_handle)) < 0) {
609 AUDIO_LOG_ERROR("snd_pcm_prepare() failed : %d", err);
610 return AUDIO_ERR_IOCTL;
613 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);
619 /* Generic snd pcm interface APIs */
620 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)
622 audio_return_t ret = AUDIO_RET_OK;
623 snd_pcm_hw_params_t *hwparams;
626 unsigned int val = 0;
627 snd_pcm_uframes_t _period_size = period_size ? *period_size : 0;
628 snd_pcm_uframes_t _buffer_size = buffer_size ? *buffer_size : 0;
629 uint8_t _use_mmap = use_mmap && *use_mmap;
630 uint32_t channels = 0;
632 AUDIO_RETURN_VAL_IF_FAIL(pcm, AUDIO_ERR_PARAMETER);
634 snd_pcm_hw_params_alloca(&hwparams);
636 /* Skip parameter setting to null device. */
637 if (snd_pcm_type(pcm) == SND_PCM_TYPE_NULL)
638 return AUDIO_ERR_IOCTL;
640 /* Allocate a hardware parameters object. */
641 snd_pcm_hw_params_alloca(&hwparams);
643 /* Fill it in with default values. */
644 if (snd_pcm_hw_params_any(pcm, hwparams) < 0) {
645 AUDIO_LOG_ERROR("snd_pcm_hw_params_any() : failed! - %s\n", snd_strerror(err));
649 /* Set the desired hardware parameters. */
653 if (snd_pcm_hw_params_set_access(pcm, hwparams, SND_PCM_ACCESS_MMAP_INTERLEAVED) < 0) {
655 /* mmap() didn't work, fall back to interleaved */
657 if ((ret = snd_pcm_hw_params_set_access(pcm, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
658 AUDIO_LOG_DEBUG("snd_pcm_hw_params_set_access() failed: %s", snd_strerror(ret));
665 } else if ((ret = snd_pcm_hw_params_set_access(pcm, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
666 AUDIO_LOG_DEBUG("snd_pcm_hw_params_set_access() failed: %s", snd_strerror(ret));
669 AUDIO_LOG_DEBUG("setting rate - %d", sample_spec->rate);
670 err = snd_pcm_hw_params_set_rate(pcm, hwparams, sample_spec->rate, 0);
672 AUDIO_LOG_ERROR("snd_pcm_hw_params_set_rate() : failed! - %s\n", snd_strerror(err));
675 err = snd_pcm_hw_params(pcm, hwparams);
677 AUDIO_LOG_ERROR("snd_pcm_hw_params() : failed! - %s\n", snd_strerror(err));
681 /* Dump current param */
683 if ((ret = snd_pcm_hw_params_current(pcm, hwparams)) < 0) {
684 AUDIO_LOG_INFO("snd_pcm_hw_params_current() failed: %s", snd_strerror(ret));
688 if ((ret = snd_pcm_hw_params_get_period_size(hwparams, &_period_size, &dir)) < 0 ||
689 (ret = snd_pcm_hw_params_get_buffer_size(hwparams, &_buffer_size)) < 0) {
690 AUDIO_LOG_INFO("snd_pcm_hw_params_get_{period|buffer}_size() failed: %s", snd_strerror(ret));
694 snd_pcm_hw_params_get_access(hwparams, (snd_pcm_access_t *) &val);
695 AUDIO_LOG_DEBUG("access type = %s\n", snd_pcm_access_name((snd_pcm_access_t)val));
697 snd_pcm_hw_params_get_format(hwparams, &sample_spec->format);
698 AUDIO_LOG_DEBUG("format = '%s' (%s)\n",
699 snd_pcm_format_name((snd_pcm_format_t)sample_spec->format),
700 snd_pcm_format_description((snd_pcm_format_t)sample_spec->format));
702 snd_pcm_hw_params_get_subformat(hwparams, (snd_pcm_subformat_t *)&val);
703 AUDIO_LOG_DEBUG("subformat = '%s' (%s)\n",
704 snd_pcm_subformat_name((snd_pcm_subformat_t)val),
705 snd_pcm_subformat_description((snd_pcm_subformat_t)val));
707 snd_pcm_hw_params_get_channels(hwparams, &channels);
708 sample_spec->channels = (uint8_t)channels;
709 AUDIO_LOG_DEBUG("channels = %d\n", sample_spec->channels);
712 *buffer_size = _buffer_size;
715 *period_size = _period_size;
718 *use_mmap = _use_mmap;
723 return AUDIO_ERR_RESOURCE;
726 audio_return_t _pcm_set_sw_params(snd_pcm_t *pcm, snd_pcm_uframes_t avail_min, uint8_t period_event)
728 snd_pcm_sw_params_t *swparams;
729 snd_pcm_uframes_t boundary;
732 AUDIO_RETURN_VAL_IF_FAIL(pcm, AUDIO_ERR_PARAMETER);
734 snd_pcm_sw_params_alloca(&swparams);
736 if ((err = snd_pcm_sw_params_current(pcm, swparams)) < 0) {
737 AUDIO_LOG_WARN("Unable to determine current swparams: %s\n", snd_strerror(err));
740 if ((err = snd_pcm_sw_params_set_period_event(pcm, swparams, period_event)) < 0) {
741 AUDIO_LOG_WARN("Unable to disable period event: %s\n", snd_strerror(err));
744 if ((err = snd_pcm_sw_params_set_tstamp_mode(pcm, swparams, SND_PCM_TSTAMP_ENABLE)) < 0) {
745 AUDIO_LOG_WARN("Unable to enable time stamping: %s\n", snd_strerror(err));
748 if ((err = snd_pcm_sw_params_get_boundary(swparams, &boundary)) < 0) {
749 AUDIO_LOG_WARN("Unable to get boundary: %s\n", snd_strerror(err));
752 if ((err = snd_pcm_sw_params_set_stop_threshold(pcm, swparams, boundary)) < 0) {
753 AUDIO_LOG_WARN("Unable to set stop threshold: %s\n", snd_strerror(err));
756 if ((err = snd_pcm_sw_params_set_start_threshold(pcm, swparams, (snd_pcm_uframes_t) avail_min)) < 0) {
757 AUDIO_LOG_WARN("Unable to set start threshold: %s\n", snd_strerror(err));
760 if ((err = snd_pcm_sw_params_set_avail_min(pcm, swparams, avail_min)) < 0) {
761 AUDIO_LOG_WARN("snd_pcm_sw_params_set_avail_min() failed: %s", snd_strerror(err));
764 if ((err = snd_pcm_sw_params(pcm, swparams)) < 0) {
765 AUDIO_LOG_WARN("Unable to set sw params: %s\n", snd_strerror(err));