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pcm.h
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1 
12 /*
13  * This library is free software; you can redistribute it and/or modify
14  * it under the terms of the GNU Lesser General Public License as
15  * published by the Free Software Foundation; either version 2.1 of
16  * the License, or (at your option) any later version.
17  *
18  * This program is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21  * GNU Lesser General Public License for more details.
22  *
23  * You should have received a copy of the GNU Lesser General Public
24  * License along with this library; if not, write to the Free Software
25  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26  *
27  */
28 
29 #ifndef __ALSA_PCM_H
30 #define __ALSA_PCM_H
31 
32 #ifdef __cplusplus
33 extern "C" {
34 #endif
35 
36 #include <stdint.h>
37 
45 #define SND_PCM_DLSYM_VERSION _dlsym_pcm_001
46 
48 typedef struct _snd_pcm_info snd_pcm_info_t;
49 
64 typedef struct _snd_pcm_hw_params snd_pcm_hw_params_t;
65 
67 typedef struct _snd_pcm_sw_params snd_pcm_sw_params_t;
69  typedef struct _snd_pcm_status snd_pcm_status_t;
71 typedef struct _snd_pcm_access_mask snd_pcm_access_mask_t;
73 typedef struct _snd_pcm_format_mask snd_pcm_format_mask_t;
75 typedef struct _snd_pcm_subformat_mask snd_pcm_subformat_mask_t;
76 
78 typedef enum _snd_pcm_class {
88  SND_PCM_CLASS_LAST = SND_PCM_CLASS_DIGITIZER
90 
92 typedef enum _snd_pcm_subclass {
97  SND_PCM_SUBCLASS_LAST = SND_PCM_SUBCLASS_MULTI_MIX
99 
101 typedef enum _snd_pcm_stream {
106  SND_PCM_STREAM_LAST = SND_PCM_STREAM_CAPTURE
108 
110 typedef enum _snd_pcm_access {
121  SND_PCM_ACCESS_LAST = SND_PCM_ACCESS_RW_NONINTERLEAVED
123 
125 typedef enum _snd_pcm_format {
212  /* G.723 (ADPCM) 24 kbit/s, 8 samples in 3 bytes */
213  SND_PCM_FORMAT_G723_24,
214  /* G.723 (ADPCM) 24 kbit/s, 1 sample in 1 byte */
215  SND_PCM_FORMAT_G723_24_1B,
216  /* G.723 (ADPCM) 40 kbit/s, 8 samples in 3 bytes */
217  SND_PCM_FORMAT_G723_40,
218  /* G.723 (ADPCM) 40 kbit/s, 1 sample in 1 byte */
219  SND_PCM_FORMAT_G723_40_1B,
220  /* Direct Stream Digital (DSD) in 1-byte samples (x8) */
221  SND_PCM_FORMAT_DSD_U8,
222  /* Direct Stream Digital (DSD) in 2-byte samples (x16) */
223  SND_PCM_FORMAT_DSD_U16_LE,
224  /* Direct Stream Digital (DSD) in 4-byte samples (x32) */
225  SND_PCM_FORMAT_DSD_U32_LE,
226  /* Direct Stream Digital (DSD) in 2-byte samples (x16) */
227  SND_PCM_FORMAT_DSD_U16_BE,
228  /* Direct Stream Digital (DSD) in 4-byte samples (x32) */
229  SND_PCM_FORMAT_DSD_U32_BE,
230  SND_PCM_FORMAT_LAST = SND_PCM_FORMAT_DSD_U32_BE,
231 
232 #if __BYTE_ORDER == __LITTLE_ENDIAN
233 
255 #elif __BYTE_ORDER == __BIG_ENDIAN
256 
278 #else
279 #error "Unknown endian"
280 #endif
282 
284 typedef enum _snd_pcm_subformat {
287  SND_PCM_SUBFORMAT_LAST = SND_PCM_SUBFORMAT_STD
289 
291 typedef enum _snd_pcm_state {
310  SND_PCM_STATE_LAST = SND_PCM_STATE_DISCONNECTED,
314 
316 typedef enum _snd_pcm_start {
321  SND_PCM_START_LAST = SND_PCM_START_EXPLICIT
323 
325 typedef enum _snd_pcm_xrun {
330  SND_PCM_XRUN_LAST = SND_PCM_XRUN_STOP
332 
334 typedef enum _snd_pcm_tstamp {
343  SND_PCM_TSTAMP_LAST = SND_PCM_TSTAMP_ENABLE
345 
346 typedef enum _snd_pcm_tstamp_type {
350  SND_PCM_TSTAMP_TYPE_LAST = SND_PCM_TSTAMP_TYPE_MONOTONIC_RAW,
352 
353 typedef struct _snd_pcm_audio_tstamp_config {
354  /* 5 of max 16 bits used */
355  unsigned int type_requested:4;
356  unsigned int report_delay:1; /* add total delay to A/D or D/A */
358 
359 typedef struct _snd_pcm_audio_tstamp_report {
360  /* 6 of max 16 bits used for bit-fields */
361 
362  /* for backwards compatibility */
363  unsigned int valid:1;
364 
365  /* actual type if hardware could not support requested timestamp */
366  unsigned int actual_type:4;
367 
368  /* accuracy represented in ns units */
369  unsigned int accuracy_report:1; /* 0 if accuracy unknown, 1 if accuracy field is valid */
370  unsigned int accuracy; /* up to 4.29s, will be packed in separate field */
372 
374 typedef unsigned long snd_pcm_uframes_t;
376 typedef long snd_pcm_sframes_t;
377 
379 #define SND_PCM_NONBLOCK 0x00000001
380 
381 #define SND_PCM_ASYNC 0x00000002
382 
383 #define SND_PCM_ABORT 0x00008000
384 
385 #define SND_PCM_NO_AUTO_RESAMPLE 0x00010000
386 
387 #define SND_PCM_NO_AUTO_CHANNELS 0x00020000
388 
389 #define SND_PCM_NO_AUTO_FORMAT 0x00040000
390 
391 #define SND_PCM_NO_SOFTVOL 0x00080000
392 
394 typedef struct _snd_pcm snd_pcm_t;
395 
461  SND_PCM_TYPE_LAST = SND_PCM_TYPE_MMAP_EMUL
462 };
463 
466 
468 typedef struct _snd_pcm_channel_area {
470  void *addr;
472  unsigned int first;
474  unsigned int step;
476 
478 typedef union _snd_pcm_sync_id {
480  unsigned char id[16];
482  unsigned short id16[8];
484  unsigned int id32[4];
486 
488 typedef struct _snd_pcm_scope snd_pcm_scope_t;
489 
490 int snd_pcm_open(snd_pcm_t **pcm, const char *name,
491  snd_pcm_stream_t stream, int mode);
492 int snd_pcm_open_lconf(snd_pcm_t **pcm, const char *name,
493  snd_pcm_stream_t stream, int mode,
494  snd_config_t *lconf);
496  const char *name, const char *orig_name,
497  snd_pcm_stream_t stream, int mode);
498 
499 int snd_pcm_close(snd_pcm_t *pcm);
500 const char *snd_pcm_name(snd_pcm_t *pcm);
501 snd_pcm_type_t snd_pcm_type(snd_pcm_t *pcm);
504 int snd_pcm_poll_descriptors(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int space);
505 int snd_pcm_poll_descriptors_revents(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
506 int snd_pcm_nonblock(snd_pcm_t *pcm, int nonblock);
507 static __inline__ int snd_pcm_abort(snd_pcm_t *pcm) { return snd_pcm_nonblock(pcm, 2); }
509  snd_async_callback_t callback, void *private_data);
511 int snd_pcm_info(snd_pcm_t *pcm, snd_pcm_info_t *info);
514 int snd_pcm_hw_free(snd_pcm_t *pcm);
517 int snd_pcm_prepare(snd_pcm_t *pcm);
518 int snd_pcm_reset(snd_pcm_t *pcm);
519 int snd_pcm_status(snd_pcm_t *pcm, snd_pcm_status_t *status);
520 int snd_pcm_start(snd_pcm_t *pcm);
521 int snd_pcm_drop(snd_pcm_t *pcm);
522 int snd_pcm_drain(snd_pcm_t *pcm);
523 int snd_pcm_pause(snd_pcm_t *pcm, int enable);
525 int snd_pcm_hwsync(snd_pcm_t *pcm);
526 int snd_pcm_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp);
527 int snd_pcm_resume(snd_pcm_t *pcm);
528 int snd_pcm_htimestamp(snd_pcm_t *pcm, snd_pcm_uframes_t *avail, snd_htimestamp_t *tstamp);
529 snd_pcm_sframes_t snd_pcm_avail(snd_pcm_t *pcm);
530 snd_pcm_sframes_t snd_pcm_avail_update(snd_pcm_t *pcm);
531 int snd_pcm_avail_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *availp, snd_pcm_sframes_t *delayp);
532 snd_pcm_sframes_t snd_pcm_rewindable(snd_pcm_t *pcm);
533 snd_pcm_sframes_t snd_pcm_rewind(snd_pcm_t *pcm, snd_pcm_uframes_t frames);
534 snd_pcm_sframes_t snd_pcm_forwardable(snd_pcm_t *pcm);
535 snd_pcm_sframes_t snd_pcm_forward(snd_pcm_t *pcm, snd_pcm_uframes_t frames);
536 snd_pcm_sframes_t snd_pcm_writei(snd_pcm_t *pcm, const void *buffer, snd_pcm_uframes_t size);
537 snd_pcm_sframes_t snd_pcm_readi(snd_pcm_t *pcm, void *buffer, snd_pcm_uframes_t size);
538 snd_pcm_sframes_t snd_pcm_writen(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size);
539 snd_pcm_sframes_t snd_pcm_readn(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size);
540 int snd_pcm_wait(snd_pcm_t *pcm, int timeout);
541 
542 int snd_pcm_link(snd_pcm_t *pcm1, snd_pcm_t *pcm2);
543 int snd_pcm_unlink(snd_pcm_t *pcm);
544 
546 #define SND_CHMAP_API_VERSION ((1 << 16) | (0 << 8) | 1)
547 
555 };
556 
596  SND_CHMAP_LAST = SND_CHMAP_BRC,
597 };
598 
600 #define SND_CHMAP_POSITION_MASK 0xffff
601 
603 #define SND_CHMAP_PHASE_INVERSE (0x01 << 16)
604 
605 #define SND_CHMAP_DRIVER_SPEC (0x02 << 16)
606 
608 typedef struct snd_pcm_chmap {
609  unsigned int channels;
610  unsigned int pos[0];
612 
614 typedef struct snd_pcm_chmap_query {
615  enum snd_pcm_chmap_type type;
618 
619 
622  int subdev,
623  snd_pcm_stream_t stream);
626 int snd_pcm_set_chmap(snd_pcm_t *pcm, const snd_pcm_chmap_t *map);
627 
628 const char *snd_pcm_chmap_type_name(enum snd_pcm_chmap_type val);
629 const char *snd_pcm_chmap_name(enum snd_pcm_chmap_position val);
630 const char *snd_pcm_chmap_long_name(enum snd_pcm_chmap_position val);
631 int snd_pcm_chmap_print(const snd_pcm_chmap_t *map, size_t maxlen, char *buf);
632 unsigned int snd_pcm_chmap_from_string(const char *str);
634 
635 //int snd_pcm_mixer_element(snd_pcm_t *pcm, snd_mixer_t *mixer, snd_mixer_elem_t **elem);
636 
637 /*
638  * application helpers - these functions are implemented on top
639  * of the basic API
640  */
641 
642 int snd_pcm_recover(snd_pcm_t *pcm, int err, int silent);
644  snd_pcm_format_t format,
645  snd_pcm_access_t access,
646  unsigned int channels,
647  unsigned int rate,
648  int soft_resample,
649  unsigned int latency);
651  snd_pcm_uframes_t *buffer_size,
652  snd_pcm_uframes_t *period_size);
653 
663 size_t snd_pcm_info_sizeof(void);
668 #define snd_pcm_info_alloca(ptr) __snd_alloca(ptr, snd_pcm_info)
671 void snd_pcm_info_copy(snd_pcm_info_t *dst, const snd_pcm_info_t *src);
672 unsigned int snd_pcm_info_get_device(const snd_pcm_info_t *obj);
673 unsigned int snd_pcm_info_get_subdevice(const snd_pcm_info_t *obj);
675 int snd_pcm_info_get_card(const snd_pcm_info_t *obj);
676 const char *snd_pcm_info_get_id(const snd_pcm_info_t *obj);
677 const char *snd_pcm_info_get_name(const snd_pcm_info_t *obj);
678 const char *snd_pcm_info_get_subdevice_name(const snd_pcm_info_t *obj);
681 unsigned int snd_pcm_info_get_subdevices_count(const snd_pcm_info_t *obj);
682 unsigned int snd_pcm_info_get_subdevices_avail(const snd_pcm_info_t *obj);
684 void snd_pcm_info_set_device(snd_pcm_info_t *obj, unsigned int val);
685 void snd_pcm_info_set_subdevice(snd_pcm_info_t *obj, unsigned int val);
687 
698 
711 int snd_pcm_hw_params_supports_audio_wallclock_ts(const snd_pcm_hw_params_t *params); /* deprecated, use audio_ts_type */
714  unsigned int *rate_num,
715  unsigned int *rate_den);
718 
719 #if 0
720 typedef struct _snd_pcm_hw_strategy snd_pcm_hw_strategy_t;
721 
722 /* choices need to be sorted on ascending badness */
723 typedef struct _snd_pcm_hw_strategy_simple_choices_list {
724  unsigned int value;
725  unsigned int badness;
726 } snd_pcm_hw_strategy_simple_choices_list_t;
727 
728 int snd_pcm_hw_params_strategy(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,
729  const snd_pcm_hw_strategy_t *strategy,
730  unsigned int badness_min,
731  unsigned int badness_max);
732 
733 void snd_pcm_hw_strategy_free(snd_pcm_hw_strategy_t *strategy);
734 int snd_pcm_hw_strategy_simple(snd_pcm_hw_strategy_t **strategyp,
735  unsigned int badness_min,
736  unsigned int badness_max);
737 int snd_pcm_hw_params_try_explain_failure(snd_pcm_t *pcm,
738  snd_pcm_hw_params_t *fail,
739  snd_pcm_hw_params_t *success,
740  unsigned int depth,
741  snd_output_t *out);
742 
743 #endif
744 
745 size_t snd_pcm_hw_params_sizeof(void);
750 #define snd_pcm_hw_params_alloca(ptr) __snd_alloca(ptr, snd_pcm_hw_params)
754 
755 #if !defined(ALSA_LIBRARY_BUILD) && !defined(ALSA_PCM_OLD_HW_PARAMS_API)
756 
764 
772 
780 
781 int snd_pcm_hw_params_get_channels(const snd_pcm_hw_params_t *params, unsigned int *val);
782 int snd_pcm_hw_params_get_channels_min(const snd_pcm_hw_params_t *params, unsigned int *val);
783 int snd_pcm_hw_params_get_channels_max(const snd_pcm_hw_params_t *params, unsigned int *val);
784 int snd_pcm_hw_params_test_channels(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val);
785 int snd_pcm_hw_params_set_channels(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val);
786 int snd_pcm_hw_params_set_channels_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
787 int snd_pcm_hw_params_set_channels_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
788 int snd_pcm_hw_params_set_channels_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, unsigned int *max);
789 int snd_pcm_hw_params_set_channels_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
790 int snd_pcm_hw_params_set_channels_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
791 int snd_pcm_hw_params_set_channels_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
792 
793 int snd_pcm_hw_params_get_rate(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
794 int snd_pcm_hw_params_get_rate_min(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
795 int snd_pcm_hw_params_get_rate_max(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
796 int snd_pcm_hw_params_test_rate(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
797 int snd_pcm_hw_params_set_rate(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
798 int snd_pcm_hw_params_set_rate_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
799 int snd_pcm_hw_params_set_rate_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
800 int snd_pcm_hw_params_set_rate_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir);
801 int snd_pcm_hw_params_set_rate_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
802 int snd_pcm_hw_params_set_rate_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
803 int snd_pcm_hw_params_set_rate_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
804 int snd_pcm_hw_params_set_rate_resample(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val);
805 int snd_pcm_hw_params_get_rate_resample(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
806 int snd_pcm_hw_params_set_export_buffer(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val);
807 int snd_pcm_hw_params_get_export_buffer(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
808 int snd_pcm_hw_params_set_period_wakeup(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val);
809 int snd_pcm_hw_params_get_period_wakeup(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
810 
811 int snd_pcm_hw_params_get_period_time(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
812 int snd_pcm_hw_params_get_period_time_min(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
813 int snd_pcm_hw_params_get_period_time_max(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
814 int snd_pcm_hw_params_test_period_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
815 int snd_pcm_hw_params_set_period_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
816 int snd_pcm_hw_params_set_period_time_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
817 int snd_pcm_hw_params_set_period_time_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
818 int snd_pcm_hw_params_set_period_time_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir);
819 int snd_pcm_hw_params_set_period_time_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
820 int snd_pcm_hw_params_set_period_time_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
821 int snd_pcm_hw_params_set_period_time_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
822 
823 int snd_pcm_hw_params_get_period_size(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *frames, int *dir);
824 int snd_pcm_hw_params_get_period_size_min(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *frames, int *dir);
825 int snd_pcm_hw_params_get_period_size_max(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *frames, int *dir);
826 int snd_pcm_hw_params_test_period_size(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val, int dir);
827 int snd_pcm_hw_params_set_period_size(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val, int dir);
828 int snd_pcm_hw_params_set_period_size_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir);
829 int snd_pcm_hw_params_set_period_size_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir);
830 int snd_pcm_hw_params_set_period_size_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *min, int *mindir, snd_pcm_uframes_t *max, int *maxdir);
831 int snd_pcm_hw_params_set_period_size_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir);
832 int snd_pcm_hw_params_set_period_size_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir);
833 int snd_pcm_hw_params_set_period_size_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir);
835 
836 int snd_pcm_hw_params_get_periods(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
837 int snd_pcm_hw_params_get_periods_min(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
838 int snd_pcm_hw_params_get_periods_max(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
839 int snd_pcm_hw_params_test_periods(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
840 int snd_pcm_hw_params_set_periods(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
841 int snd_pcm_hw_params_set_periods_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
842 int snd_pcm_hw_params_set_periods_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
843 int snd_pcm_hw_params_set_periods_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir);
844 int snd_pcm_hw_params_set_periods_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
845 int snd_pcm_hw_params_set_periods_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
846 int snd_pcm_hw_params_set_periods_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
848 
849 int snd_pcm_hw_params_get_buffer_time(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
850 int snd_pcm_hw_params_get_buffer_time_min(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
851 int snd_pcm_hw_params_get_buffer_time_max(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
852 int snd_pcm_hw_params_test_buffer_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
853 int snd_pcm_hw_params_set_buffer_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
854 int snd_pcm_hw_params_set_buffer_time_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
855 int snd_pcm_hw_params_set_buffer_time_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
856 int snd_pcm_hw_params_set_buffer_time_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir);
857 int snd_pcm_hw_params_set_buffer_time_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
858 int snd_pcm_hw_params_set_buffer_time_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
859 int snd_pcm_hw_params_set_buffer_time_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
860 
861 int snd_pcm_hw_params_get_buffer_size(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
862 int snd_pcm_hw_params_get_buffer_size_min(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
863 int snd_pcm_hw_params_get_buffer_size_max(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
864 int snd_pcm_hw_params_test_buffer_size(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val);
865 int snd_pcm_hw_params_set_buffer_size(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val);
866 int snd_pcm_hw_params_set_buffer_size_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
867 int snd_pcm_hw_params_set_buffer_size_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
868 int snd_pcm_hw_params_set_buffer_size_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *min, snd_pcm_uframes_t *max);
869 int snd_pcm_hw_params_set_buffer_size_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
870 int snd_pcm_hw_params_set_buffer_size_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
871 int snd_pcm_hw_params_set_buffer_size_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
872 
873 #endif /* !ALSA_LIBRARY_BUILD && !ALSA_PCM_OLD_HW_PARAMS_API */
874 
875 int snd_pcm_hw_params_get_min_align(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
876 
886 size_t snd_pcm_sw_params_sizeof(void);
891 #define snd_pcm_sw_params_alloca(ptr) __snd_alloca(ptr, snd_pcm_sw_params)
895 int snd_pcm_sw_params_get_boundary(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val);
896 
897 #if !defined(ALSA_LIBRARY_BUILD) && !defined(ALSA_PCM_OLD_SW_PARAMS_API)
898 
903 int snd_pcm_sw_params_set_avail_min(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val);
904 int snd_pcm_sw_params_get_avail_min(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val);
906 int snd_pcm_sw_params_get_period_event(const snd_pcm_sw_params_t *params, int *val);
907 int snd_pcm_sw_params_set_start_threshold(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val);
908 int snd_pcm_sw_params_get_start_threshold(const snd_pcm_sw_params_t *paramsm, snd_pcm_uframes_t *val);
909 int snd_pcm_sw_params_set_stop_threshold(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val);
910 int snd_pcm_sw_params_get_stop_threshold(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val);
911 int snd_pcm_sw_params_set_silence_threshold(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val);
912 int snd_pcm_sw_params_get_silence_threshold(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val);
913 int snd_pcm_sw_params_set_silence_size(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val);
914 int snd_pcm_sw_params_get_silence_size(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val);
915 
916 #endif /* !ALSA_LIBRARY_BUILD && !ALSA_PCM_OLD_SW_PARAMS_API */
917 
920 /* include old API */
921 #ifndef ALSA_LIBRARY_BUILD
922 #if defined(ALSA_PCM_OLD_HW_PARAMS_API) || defined(ALSA_PCM_OLD_SW_PARAMS_API)
923 #include "pcm_old.h"
924 #endif
925 #endif
926 
934 size_t snd_pcm_access_mask_sizeof(void);
939 #define snd_pcm_access_mask_alloca(ptr) __snd_alloca(ptr, snd_pcm_access_mask)
949 
959 size_t snd_pcm_format_mask_sizeof(void);
964 #define snd_pcm_format_mask_alloca(ptr) __snd_alloca(ptr, snd_pcm_format_mask)
974 
984 size_t snd_pcm_subformat_mask_sizeof(void);
989 #define snd_pcm_subformat_mask_alloca(ptr) __snd_alloca(ptr, snd_pcm_subformat_mask)
999 
1009 size_t snd_pcm_status_sizeof(void);
1014 #define snd_pcm_status_alloca(ptr) __snd_alloca(ptr, snd_pcm_status)
1026  snd_pcm_audio_tstamp_report_t *audio_tstamp_report);
1028  snd_pcm_audio_tstamp_config_t *audio_tstamp_config);
1029 
1030 static inline void snd_pcm_pack_audio_tstamp_config(unsigned int *data,
1032 {
1033  *data = config->report_delay;
1034  *data <<= 4;
1035  *data |= config->type_requested;
1036 }
1037 
1038 static inline void snd_pcm_unpack_audio_tstamp_report(unsigned int data, unsigned int accuracy,
1040 {
1041  data >>= 16;
1042  report->valid = data & 1;
1043  report->actual_type = (data >> 1) & 0xF;
1044  report->accuracy_report = (data >> 5) & 1;
1045  report->accuracy = accuracy;
1046 }
1047 
1048 snd_pcm_sframes_t snd_pcm_status_get_delay(const snd_pcm_status_t *obj);
1049 snd_pcm_uframes_t snd_pcm_status_get_avail(const snd_pcm_status_t *obj);
1050 snd_pcm_uframes_t snd_pcm_status_get_avail_max(const snd_pcm_status_t *obj);
1051 snd_pcm_uframes_t snd_pcm_status_get_overrange(const snd_pcm_status_t *obj);
1052 
1062 const char *snd_pcm_type_name(snd_pcm_type_t type);
1063 const char *snd_pcm_stream_name(const snd_pcm_stream_t stream);
1064 const char *snd_pcm_access_name(const snd_pcm_access_t _access);
1065 const char *snd_pcm_format_name(const snd_pcm_format_t format);
1066 const char *snd_pcm_format_description(const snd_pcm_format_t format);
1067 const char *snd_pcm_subformat_name(const snd_pcm_subformat_t subformat);
1068 const char *snd_pcm_subformat_description(const snd_pcm_subformat_t subformat);
1069 snd_pcm_format_t snd_pcm_format_value(const char* name);
1070 const char *snd_pcm_tstamp_mode_name(const snd_pcm_tstamp_t mode);
1071 const char *snd_pcm_state_name(const snd_pcm_state_t state);
1072 
1082 int snd_pcm_dump(snd_pcm_t *pcm, snd_output_t *out);
1085 int snd_pcm_dump_setup(snd_pcm_t *pcm, snd_output_t *out);
1089 
1099 int snd_pcm_mmap_begin(snd_pcm_t *pcm,
1100  const snd_pcm_channel_area_t **areas,
1101  snd_pcm_uframes_t *offset,
1102  snd_pcm_uframes_t *frames);
1103 snd_pcm_sframes_t snd_pcm_mmap_commit(snd_pcm_t *pcm,
1104  snd_pcm_uframes_t offset,
1105  snd_pcm_uframes_t frames);
1106 snd_pcm_sframes_t snd_pcm_mmap_writei(snd_pcm_t *pcm, const void *buffer, snd_pcm_uframes_t size);
1107 snd_pcm_sframes_t snd_pcm_mmap_readi(snd_pcm_t *pcm, void *buffer, snd_pcm_uframes_t size);
1108 snd_pcm_sframes_t snd_pcm_mmap_writen(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size);
1109 snd_pcm_sframes_t snd_pcm_mmap_readn(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size);
1110 
1127 int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
1128 int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
1129 snd_pcm_format_t snd_pcm_build_linear_format(int width, int pwidth, int unsignd, int big_endian);
1130 ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
1135 int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int samples);
1136 
1137 snd_pcm_sframes_t snd_pcm_bytes_to_frames(snd_pcm_t *pcm, ssize_t bytes);
1138 ssize_t snd_pcm_frames_to_bytes(snd_pcm_t *pcm, snd_pcm_sframes_t frames);
1139 long snd_pcm_bytes_to_samples(snd_pcm_t *pcm, ssize_t bytes);
1140 ssize_t snd_pcm_samples_to_bytes(snd_pcm_t *pcm, long samples);
1141 
1142 int snd_pcm_area_silence(const snd_pcm_channel_area_t *dst_channel, snd_pcm_uframes_t dst_offset,
1143  unsigned int samples, snd_pcm_format_t format);
1144 int snd_pcm_areas_silence(const snd_pcm_channel_area_t *dst_channels, snd_pcm_uframes_t dst_offset,
1145  unsigned int channels, snd_pcm_uframes_t frames, snd_pcm_format_t format);
1146 int snd_pcm_area_copy(const snd_pcm_channel_area_t *dst_channel, snd_pcm_uframes_t dst_offset,
1147  const snd_pcm_channel_area_t *src_channel, snd_pcm_uframes_t src_offset,
1148  unsigned int samples, snd_pcm_format_t format);
1149 int snd_pcm_areas_copy(const snd_pcm_channel_area_t *dst_channels, snd_pcm_uframes_t dst_offset,
1150  const snd_pcm_channel_area_t *src_channels, snd_pcm_uframes_t src_offset,
1151  unsigned int channels, snd_pcm_uframes_t frames, snd_pcm_format_t format);
1152 int snd_pcm_areas_copy_wrap(const snd_pcm_channel_area_t *dst_channels,
1153  snd_pcm_uframes_t dst_offset,
1154  const snd_pcm_uframes_t dst_size,
1155  const snd_pcm_channel_area_t *src_channels,
1156  snd_pcm_uframes_t src_offset,
1157  const snd_pcm_uframes_t src_size,
1158  const unsigned int channels,
1159  snd_pcm_uframes_t frames,
1160  const snd_pcm_format_t format);
1161 
1172 typedef enum _snd_pcm_hook_type {
1173  SND_PCM_HOOK_TYPE_HW_PARAMS = 0,
1174  SND_PCM_HOOK_TYPE_HW_FREE,
1175  SND_PCM_HOOK_TYPE_CLOSE,
1176  SND_PCM_HOOK_TYPE_LAST = SND_PCM_HOOK_TYPE_CLOSE
1178 
1180 typedef struct _snd_pcm_hook snd_pcm_hook_t;
1182 typedef int (*snd_pcm_hook_func_t)(snd_pcm_hook_t *hook);
1185 void snd_pcm_hook_set_private(snd_pcm_hook_t *hook, void *private_data);
1186 int snd_pcm_hook_add(snd_pcm_hook_t **hookp, snd_pcm_t *pcm,
1187  snd_pcm_hook_type_t type,
1188  snd_pcm_hook_func_t func, void *private_data);
1190 
1201 typedef struct _snd_pcm_scope_ops {
1205  int (*enable)(snd_pcm_scope_t *scope);
1209  void (*disable)(snd_pcm_scope_t *scope);
1213  void (*start)(snd_pcm_scope_t *scope);
1217  void (*stop)(snd_pcm_scope_t *scope);
1221  void (*update)(snd_pcm_scope_t *scope);
1225  void (*reset)(snd_pcm_scope_t *scope);
1229  void (*close)(snd_pcm_scope_t *scope);
1231 
1232 snd_pcm_uframes_t snd_pcm_meter_get_bufsize(snd_pcm_t *pcm);
1233 unsigned int snd_pcm_meter_get_channels(snd_pcm_t *pcm);
1234 unsigned int snd_pcm_meter_get_rate(snd_pcm_t *pcm);
1235 snd_pcm_uframes_t snd_pcm_meter_get_now(snd_pcm_t *pcm);
1236 snd_pcm_uframes_t snd_pcm_meter_get_boundary(snd_pcm_t *pcm);
1238 snd_pcm_scope_t *snd_pcm_meter_search_scope(snd_pcm_t *pcm, const char *name);
1241  const snd_pcm_scope_ops_t *val);
1242 void snd_pcm_scope_set_name(snd_pcm_scope_t *scope, const char *val);
1243 const char *snd_pcm_scope_get_name(snd_pcm_scope_t *scope);
1245 void snd_pcm_scope_set_callback_private(snd_pcm_scope_t *scope, void *val);
1246 int snd_pcm_scope_s16_open(snd_pcm_t *pcm, const char *name,
1247  snd_pcm_scope_t **scopep);
1249  unsigned int channel);
1250 
1261 typedef enum _snd_spcm_latency {
1272 
1274 typedef enum _snd_spcm_xrun_type {
1280 
1282 typedef enum _snd_spcm_duplex_type {
1288 
1289 int snd_spcm_init(snd_pcm_t *pcm,
1290  unsigned int rate,
1291  unsigned int channels,
1292  snd_pcm_format_t format,
1293  snd_pcm_subformat_t subformat,
1294  snd_spcm_latency_t latency,
1295  snd_pcm_access_t _access,
1296  snd_spcm_xrun_type_t xrun_type);
1297 
1298 int snd_spcm_init_duplex(snd_pcm_t *playback_pcm,
1299  snd_pcm_t *capture_pcm,
1300  unsigned int rate,
1301  unsigned int channels,
1302  snd_pcm_format_t format,
1303  snd_pcm_subformat_t subformat,
1304  snd_spcm_latency_t latency,
1305  snd_pcm_access_t _access,
1306  snd_spcm_xrun_type_t xrun_type,
1307  snd_spcm_duplex_type_t duplex_type);
1308 
1310  unsigned int *rate,
1311  snd_pcm_uframes_t *buffer_size,
1312  snd_pcm_uframes_t *period_size);
1313 
1323 /* Deprecated functions, for compatibility */
1324 const char *snd_pcm_start_mode_name(snd_pcm_start_t mode) __attribute__((deprecated));
1325 const char *snd_pcm_xrun_mode_name(snd_pcm_xrun_t mode) __attribute__((deprecated));
1326 int snd_pcm_sw_params_set_start_mode(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_start_t val) __attribute__((deprecated));
1327 snd_pcm_start_t snd_pcm_sw_params_get_start_mode(const snd_pcm_sw_params_t *params) __attribute__((deprecated));
1328 int snd_pcm_sw_params_set_xrun_mode(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_xrun_t val) __attribute__((deprecated));
1329 snd_pcm_xrun_t snd_pcm_sw_params_get_xrun_mode(const snd_pcm_sw_params_t *params) __attribute__((deprecated));
1330 #if !defined(ALSA_LIBRARY_BUILD) && !defined(ALSA_PCM_OLD_SW_PARAMS_API)
1331 int snd_pcm_sw_params_set_xfer_align(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val) __attribute__((deprecated));
1332 int snd_pcm_sw_params_get_xfer_align(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val) __attribute__((deprecated));
1333 int snd_pcm_sw_params_set_sleep_min(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, unsigned int val) __attribute__((deprecated));
1334 int snd_pcm_sw_params_get_sleep_min(const snd_pcm_sw_params_t *params, unsigned int *val) __attribute__((deprecated));
1335 #endif /* !ALSA_LIBRARY_BUILD && !ALSA_PCM_OLD_SW_PARAMS_API */
1336 #if !defined(ALSA_LIBRARY_BUILD) && !defined(ALSA_PCM_OLD_HW_PARAMS_API)
1337 int snd_pcm_hw_params_get_tick_time(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated));
1338 int snd_pcm_hw_params_get_tick_time_min(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated));
1339 int snd_pcm_hw_params_get_tick_time_max(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated));
1340 int snd_pcm_hw_params_test_tick_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir) __attribute__((deprecated));
1341 int snd_pcm_hw_params_set_tick_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir) __attribute__((deprecated));
1342 int snd_pcm_hw_params_set_tick_time_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated));
1343 int snd_pcm_hw_params_set_tick_time_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated));
1344 int snd_pcm_hw_params_set_tick_time_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir) __attribute__((deprecated));
1345 int snd_pcm_hw_params_set_tick_time_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated));
1346 int snd_pcm_hw_params_set_tick_time_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated));
1347 int snd_pcm_hw_params_set_tick_time_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated));
1348 #endif /* !ALSA_LIBRARY_BUILD && !ALSA_PCM_OLD_HW_PARAMS_API */
1349 
1352 #ifdef __cplusplus
1353 }
1354 #endif
1355 
1356 #endif /* __ALSA_PCM_H */
Definition: pcm.h:338
int snd_pcm_sw_params_get_avail_min(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val)
Get avail min from a software configuration container.
Definition: pcm.c:6405
int snd_pcm_sw_params_get_boundary(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val)
Get boundary for ring pointers from a software configuration container.
Definition: pcm.c:6164
int snd_pcm_hw_params_set_buffer_size_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)
Restrict a configuration space to contain only its maximum buffer size.
Definition: pcm.c:5831
int snd_pcm_hw_params_get_buffer_size(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)
Extract buffer size from a configuration space.
Definition: pcm.c:5653
int snd_pcm_hwsync(snd_pcm_t *pcm)
(DEPRECATED) Synchronize stream position with hardware
Definition: pcm.c:1042
struct _snd_pcm_sw_params snd_pcm_sw_params_t
Definition: pcm.h:67
void snd_pcm_hw_params_get_subformat_mask(snd_pcm_hw_params_t *params, snd_pcm_subformat_mask_t *mask)
Get subformat mask from a configuration space.
Definition: pcm.c:4366
void snd_pcm_hook_set_private(snd_pcm_hook_t *hook, void *private_data)
Set callback function private data for a PCM hook.
Definition: pcm_hooks.c:582
int snd_spcm_init_get_params(snd_pcm_t *pcm, unsigned int *rate, snd_pcm_uframes_t *buffer_size, snd_pcm_uframes_t *period_size)
Get the set up of simple PCM.
Definition: pcm_simple.c:284
Definition: pcm.h:161
int snd_pcm_access_mask_empty(const snd_pcm_access_mask_t *mask)
test, if given a snd_pcm_access_mask_t is empty
Definition: pcm.c:3808
Definition: pcm.h:426
int snd_pcm_set_chmap(snd_pcm_t *pcm, const snd_pcm_chmap_t *map)
Definition: pcm.c:8004
snd_pcm_xrun_t
Definition: pcm.h:325
int snd_pcm_sw_params_dump(snd_pcm_sw_params_t *params, snd_output_t *out)
Dump a software configuration.
Definition: pcm.c:6101
int snd_pcm_hw_params_set_buffer_time_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Restrict a configuration space to contain only its minimum buffer time.
Definition: pcm.c:5618
int snd_pcm_sw_params_get_xfer_align(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val) __attribute__((deprecated))
(DEPRECATED) Get xfer align from a software configuration container
Definition: pcm.c:6467
int snd_pcm_format_float(snd_pcm_format_t format)
Return float info for a PCM sample format.
Definition: pcm_misc.c:110
int snd_pcm_info(snd_pcm_t *pcm, snd_pcm_info_t *info)
Obtain general (static) information for PCM handle.
Definition: pcm.c:841
int snd_pcm_hw_params_get_period_size_min(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *frames, int *dir)
Extract minimum period size from a configuration space.
Definition: pcm.c:5052
int snd_pcm_hw_params_test_subformat(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_t subformat)
Verify if a subformat is available inside a configuration space for a PCM.
Definition: pcm.c:4300
int snd_pcm_hw_params_get_tick_time_min(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated))
(DEPRECATED) Extract minimum tick time from a configuration space
Definition: pcm.c:5873
uint64_t snd_pcm_format_silence_64(snd_pcm_format_t format)
Return 64 bit expressing silence for a PCM sample format.
Definition: pcm_misc.c:410
int snd_pcm_hw_params_get_rate_resample(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)
Extract resample state from a configuration space.
Definition: pcm.c:4740
int snd_pcm_hw_params_set_rate_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Restrict a configuration space to contain only its minimum rate.
Definition: pcm.c:4690
snd_pcm_start_t snd_pcm_sw_params_get_start_mode(const snd_pcm_sw_params_t *params) __attribute__((deprecated))
(DEPRECATED) Get start mode from a software configuration container
Definition: pcm.c:6204
int snd_pcm_hw_params_get_periods_min(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Extract minimum periods count from a configuration space.
Definition: pcm.c:5285
Definition: pcm.h:594
snd_pcm_chmap_t map
Definition: pcm.h:616
Definition: pcm.h:286
int snd_pcm_hw_params_get_period_wakeup(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)
Extract period wakeup flag from a configuration space.
Definition: pcm.c:4823
int snd_pcm_hw_params_get_export_buffer(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)
Extract buffer accessibility from a configuration space.
Definition: pcm.c:4772
const char * snd_pcm_start_mode_name(snd_pcm_start_t mode) __attribute__((deprecated))
(DEPRECATED) get name of PCM start mode setting
Definition: pcm.c:2100
size_t snd_pcm_info_sizeof(void)
get size of snd_pcm_info_t
Definition: pcm.c:6882
int snd_pcm_hw_params_test_tick_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir) __attribute__((deprecated))
(DEPRECATED) Verify if a tick time is available inside a configuration space for a PCM ...
Definition: pcm.c:5909
Definition: pcm.h:127
int snd_pcm_hw_params_get_periods(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Extract periods from a configuration space.
Definition: pcm.c:5267
Definition: pcm.h:440
Definition: pcm.h:563
Definition: pcm.h:614
struct _snd_pcm_subformat_mask snd_pcm_subformat_mask_t
Definition: pcm.h:75
int16_t * snd_pcm_scope_s16_get_channel_buffer(snd_pcm_scope_t *scope, unsigned int channel)
Get s16 pseudo scope frames buffer for a channel.
Definition: pcm_meter.c:1207
Definition: pcm.h:112
Definition: pcm.h:147
Definition: pcm.h:579
int snd_pcm_hw_params_set_buffer_size_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *min, snd_pcm_uframes_t *max)
Restrict a configuration space to have buffer sizes in a given range.
Definition: pcm.c:5771
snd_pcm_state_t
Definition: pcm.h:291
int snd_pcm_status_malloc(snd_pcm_status_t **ptr)
allocate an invalid snd_pcm_status_t using standard malloc
Definition: pcm.c:6679
int snd_pcm_hw_params_set_periods_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Restrict a configuration space with a minimum periods count.
Definition: pcm.c:5349
void snd_pcm_status_get_trigger_htstamp(const snd_pcm_status_t *obj, snd_htimestamp_t *ptr)
Get trigger hi-res timestamp from a PCM status container.
Definition: pcm.c:6747
Definition: pcm.h:1278
int snd_pcm_hw_params_test_buffer_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)
Verify if a buffer time is available inside a configuration space for a PCM.
Definition: pcm.c:5519
snd_pcm_class_t
Definition: pcm.h:78
Definition: pcm.h:458
unsigned int snd_pcm_meter_get_channels(snd_pcm_t *pcm)
Get meter channels from a SND_PCM_TYPE_METER PCM.
Definition: pcm_meter.c:893
int snd_pcm_hw_params_set_buffer_size_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)
Restrict a configuration space to have buffer size nearest to a target.
Definition: pcm.c:5791
int snd_pcm_hw_params_set_channels_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)
Restrict a configuration space with a maximum channels count.
Definition: pcm.c:4460
int snd_pcm_areas_copy(const snd_pcm_channel_area_t *dst_channels, snd_pcm_uframes_t dst_offset, const snd_pcm_channel_area_t *src_channels, snd_pcm_uframes_t src_offset, unsigned int channels, snd_pcm_uframes_t frames, snd_pcm_format_t format)
Copy one or more areas.
Definition: pcm.c:3229
size_t snd_pcm_format_mask_sizeof(void)
get size of snd_pcm_format_mask_t
Definition: pcm.c:3837
int snd_pcm_drop(snd_pcm_t *pcm)
Stop a PCM dropping pending frames.
Definition: pcm.c:1244
Definition: pcm.h:560
int snd_pcm_status(snd_pcm_t *pcm, snd_pcm_status_t *status)
Obtain status (runtime) information for PCM handle.
Definition: pcm.c:998
int snd_pcm_poll_descriptors_count(snd_pcm_t *pcm)
get count of poll descriptors for PCM handle
Definition: pcm.c:1650
snd_pcm_uframes_t snd_pcm_status_get_avail_max(const snd_pcm_status_t *obj)
Get maximum number of frames available from a PCM status container after last snd_pcm_status call...
Definition: pcm.c:6862
Definition: pcm.h:581
void snd_pcm_format_mask_set(snd_pcm_format_mask_t *mask, snd_pcm_format_t val)
make a format present in a snd_pcm_format_mask_t
Definition: pcm.c:3920
Definition: pcm.h:307
Definition: pcm.h:591
Definition: pcm.h:468
void(* snd_async_callback_t)(snd_async_handler_t *handler)
Async notification callback.
Definition: global.h:121
Definition: pcm.h:414
Definition: pcm.h:238
Definition: pcm.h:592
Definition: pcm.h:452
Definition: pcm.h:143
int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int samples)
Silence a PCM samples buffer.
Definition: pcm_misc.c:607
int snd_pcm_hw_params_set_periods_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Restrict a configuration space to contain only its minimum periods count.
Definition: pcm.c:5418
Definition: pcm.h:456
Definition: pcm.h:554
int snd_pcm_start(snd_pcm_t *pcm)
Start a PCM.
Definition: pcm.c:1213
snd_pcm_subformat_t
Definition: pcm.h:284
int snd_pcm_format_unsigned(snd_pcm_format_t format)
Return sign info for a PCM sample linear format.
Definition: pcm_misc.c:85
Definition: pcm.h:312
int snd_pcm_hw_params_set_period_size_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir)
Restrict a configuration space with a minimum period size.
Definition: pcm.c:5124
struct _snd_pcm_hw_params snd_pcm_hw_params_t
Definition: pcm.h:64
Definition: pcm.h:608
Definition: pcm.h:570
int snd_pcm_hw_params_supports_audio_ts_type(const snd_pcm_hw_params_t *params, int type)
Check if hardware supports type of audio timestamps.
Definition: pcm.c:3630
snd_pcm_type_t snd_pcm_type(snd_pcm_t *pcm)
get type of PCM handle
Definition: pcm.c:721
int snd_pcm_areas_copy_wrap(const snd_pcm_channel_area_t *dst_channels, snd_pcm_uframes_t dst_offset, const snd_pcm_uframes_t dst_size, const snd_pcm_channel_area_t *src_channels, snd_pcm_uframes_t src_offset, const snd_pcm_uframes_t src_size, const unsigned int channels, snd_pcm_uframes_t frames, const snd_pcm_format_t format)
Copy one or more areas.
Definition: pcm.c:3307
int snd_pcm_hw_params_set_access_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t *_access)
Restrict a configuration space to contain only its last access type.
Definition: pcm.c:4152
void * addr
Definition: pcm.h:470
struct _snd_pcm_status snd_pcm_status_t
Definition: pcm.h:69
struct _snd_pcm_info snd_pcm_info_t
Definition: pcm.h:48
Definition: pcm.h:131
const char * snd_pcm_chmap_name(enum snd_pcm_chmap_position val)
Definition: pcm.c:8063
int snd_pcm_hw_params_can_mmap_sample_resolution(const snd_pcm_hw_params_t *params)
Check if hardware supports sample-resolution mmap for given configuration.
Definition: pcm.c:3376
Definition: pcm.h:203
int snd_pcm_hw_params_set_period_time_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Restrict a configuration space to contain only its minimum period time.
Definition: pcm.c:4994
void snd_pcm_format_mask_reset(snd_pcm_format_mask_t *mask, snd_pcm_format_t val)
make a format missing from a snd_pcm_format_mask_t
Definition: pcm.c:3930
Definition: pcm.h:135
Definition: pcm.h:139
void snd_pcm_hw_params_get_format_mask(snd_pcm_hw_params_t *params, snd_pcm_format_mask_t *mask)
Get format mask from a configuration space.
Definition: pcm.c:4272
int snd_pcm_hw_params_set_format_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t *format)
Restrict a configuration space to contain only its first format.
Definition: pcm.c:4233
Definition: pcm.h:428
_snd_pcm_type
Definition: pcm.h:397
Definition: pcm.h:169
int snd_pcm_hw_params_set_rate_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Restrict a configuration space to have rate nearest to a target.
Definition: pcm.c:4671
Definition: pcm.h:553
snd_pcm_chmap_type
Definition: pcm.h:549
Definition: pcm.h:424
Definition: pcm.h:189
int snd_pcm_hw_params_is_joint_duplex(const snd_pcm_hw_params_t *params)
Check if hardware does joint-duplex (playback and capture are somewhat correlated) ...
Definition: pcm.c:3556
snd_pcm_subclass_t
Definition: pcm.h:92
int snd_pcm_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp)
Obtain delay for a running PCM handle.
Definition: pcm.c:1090
Definition: pcm.h:133
int snd_pcm_hw_params_test_format(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t val)
Verify if a format is available inside a configuration space for a PCM.
Definition: pcm.c:4206
int snd_pcm_areas_silence(const snd_pcm_channel_area_t *dst_channels, snd_pcm_uframes_t dst_offset, unsigned int channels, snd_pcm_uframes_t frames, snd_pcm_format_t format)
Silence one or more areas.
Definition: pcm.c:3057
int snd_pcm_hw_params_get_buffer_size_max(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)
Extract maximum buffer size from a configuration space.
Definition: pcm.c:5693
const char * snd_pcm_format_description(const snd_pcm_format_t format)
get description of PCM sample format
Definition: pcm.c:2037
Definition: pcm.h:408
int snd_pcm_wait(snd_pcm_t *pcm, int timeout)
Wait for a PCM to become ready.
Definition: pcm.c:2738
int snd_pcm_hook_remove(snd_pcm_hook_t *hook)
Remove a PCM hook.
Definition: pcm_hooks.c:628
snd_pcm_scope_t * snd_pcm_meter_search_scope(snd_pcm_t *pcm, const char *name)
Search an installed scope inside a SND_PCM_TYPE_METER PCM.
Definition: pcm_meter.c:859
int snd_pcm_hw_params_dump(snd_pcm_hw_params_t *params, snd_output_t *out)
Dump a PCM hardware configuration space.
Definition: pcm.c:3356
int snd_pcm_hw_params_get_tick_time_max(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated))
(DEPRECATED) Extract maximum tick time from a configuration space
Definition: pcm.c:5892
int snd_pcm_hw_params_set_subformat_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_t *subformat)
Restrict a configuration space to contain only its last subformat.
Definition: pcm.c:4343
int snd_pcm_hw_params_is_block_transfer(const snd_pcm_hw_params_t *params)
Check if hardware does block transfers for samples for given configuration.
Definition: pcm.c:3436
void snd_pcm_access_mask_any(snd_pcm_access_mask_t *mask)
set all bits in a snd_pcm_access_mask_t
Definition: pcm.c:3787
int snd_pcm_hw_params_get_buffer_time(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Extract buffer time from a configuration space.
Definition: pcm.c:5467
int snd_pcm_close(snd_pcm_t *pcm)
close PCM handle
Definition: pcm.c:748
const char * snd_pcm_info_get_subdevice_name(const snd_pcm_info_t *obj)
Get subdevice name from a PCM info container.
Definition: pcm.c:6992
void snd_pcm_status_get_driver_htstamp(const snd_pcm_status_t *obj, snd_htimestamp_t *ptr)
Get &quot;now&quot; hi-res driver timestamp from a PCM status container. Defines when the status was generated ...
Definition: pcm.c:6800
int snd_pcm_sw_params_set_xfer_align(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val) __attribute__((deprecated))
(DEPRECATED) Set xfer align inside a software configuration container
Definition: pcm.c:6452
Definition: pcm.h:580
Definition: pcm.h:145
void snd_pcm_subformat_mask_reset(snd_pcm_subformat_mask_t *mask, snd_pcm_subformat_t val)
make a subformat missing from a snd_pcm_subformat_mask_t
Definition: pcm.c:4033
Definition: pcm.h:550
Definition: pcm.h:418
int snd_pcm_hw_params_set_period_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)
Restrict a configuration space to contain only one period time.
Definition: pcm.c:4909
void snd_pcm_subformat_mask_free(snd_pcm_subformat_mask_t *obj)
frees a previously allocated snd_pcm_subformat_mask_t
Definition: pcm.c:3963
int snd_pcm_sw_params_get_tstamp_mode(const snd_pcm_sw_params_t *params, snd_pcm_tstamp_t *val)
Get timestamp mode from a software configuration container.
Definition: pcm.c:6294
int snd_pcm_status_dump(snd_pcm_status_t *status, snd_output_t *out)
Dump status.
Definition: pcm.c:2256
Definition: pcm.h:416
int snd_pcm_hw_params_set_rate_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Restrict a configuration space with a minimum rate.
Definition: pcm.c:4621
Definition: pcm.h:434
void snd_pcm_scope_set_name(snd_pcm_scope_t *scope, const char *val)
Set name of a SND_PCM_TYPE_METER PCM scope.
Definition: pcm_meter.c:949
Definition: pcm.h:420
Definition: pcm.h:250
Definition: pcm.h:1270
void snd_pcm_hw_params_copy(snd_pcm_hw_params_t *dst, const snd_pcm_hw_params_t *src)
copy one snd_pcm_hw_params_t to another
Definition: pcm.c:4076
snd_pcm_start_t
Definition: pcm.h:316
int snd_pcm_format_width(snd_pcm_format_t format)
Return nominal bits per a PCM sample.
Definition: pcm_misc.c:210
int snd_pcm_hw_params_can_pause(const snd_pcm_hw_params_t *params)
Check if hardware supports pause.
Definition: pcm.c:3496
int snd_pcm_hw_params_set_buffer_size(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val)
Restrict a configuration space to contain only one buffer size.
Definition: pcm.c:5726
int snd_pcm_nonblock(snd_pcm_t *pcm, int nonblock)
set nonblock mode
Definition: pcm.c:781
void snd_pcm_status_get_tstamp(const snd_pcm_status_t *obj, snd_timestamp_t *ptr)
Get &quot;now&quot; timestamp from a PCM status container.
Definition: pcm.c:6760
void * snd_pcm_scope_get_callback_private(snd_pcm_scope_t *scope)
Get callbacks private value for a SND_PCM_TYPE_METER PCM scope.
Definition: pcm_meter.c:979
Definition: pcm.h:1276
size_t snd_pcm_status_sizeof(void)
get size of snd_pcm_status_t
Definition: pcm.c:6669
int snd_pcm_hw_params_set_format_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t *format)
Restrict a configuration space to contain only its last format.
Definition: pcm.c:4249
void snd_pcm_info_free(snd_pcm_info_t *obj)
frees a previously allocated snd_pcm_info_t
Definition: pcm.c:6905
Definition: pcm.h:1284
Definition: pcm.h:151
int snd_pcm_hw_params_get_period_size(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *frames, int *dir)
Extract period size from a configuration space.
Definition: pcm.c:5030
int snd_pcm_get_params(snd_pcm_t *pcm, snd_pcm_uframes_t *buffer_size, snd_pcm_uframes_t *period_size)
Get the transfer size parameters in a simple way.
Definition: pcm.c:8648
Definition: pcm.h:336
int snd_pcm_hw_params_malloc(snd_pcm_hw_params_t **ptr)
allocate an invalid snd_pcm_hw_params_t using standard malloc
Definition: pcm.c:4053
Definition: pcm.h:571
Definition: pcm.h:105
int snd_pcm_hw_params_get_rate_max(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Extract maximum rate from a configuration space.
Definition: pcm.c:4575
Definition: pcm.h:589
int snd_pcm_hw_params_set_period_size_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir)
Restrict a configuration space with a maximum period size.
Definition: pcm.c:5143
int snd_pcm_chmap_print(const snd_pcm_chmap_t *map, size_t maxlen, char *buf)
Definition: pcm.c:8131
Definition: pcm.h:299
void snd_pcm_access_mask_free(snd_pcm_access_mask_t *obj)
frees a previously allocated snd_pcm_access_mask_t
Definition: pcm.c:3758
Definition: pcm.h:163
int snd_pcm_hw_params_set_subformat_mask(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_mask_t *mask)
Restrict a configuration space to contain only a set of subformats.
Definition: pcm.c:4356
void snd_pcm_format_mask_free(snd_pcm_format_mask_t *obj)
frees a previously allocated snd_pcm_format_mask_t
Definition: pcm.c:3860
int snd_pcm_subformat_mask_empty(const snd_pcm_subformat_mask_t *mask)
test, if given a snd_pcm_subformat_mask_t is empty
Definition: pcm.c:4013
const char * snd_pcm_xrun_mode_name(snd_pcm_xrun_t mode) __attribute__((deprecated))
(DEPRECATED) get name of PCM xrun mode setting
Definition: pcm.c:2116
int snd_pcm_hw_params_test_periods(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)
Verify if a periods count is available inside a configuration space for a PCM.
Definition: pcm.c:5319
Definition: pcm.h:442
int snd_pcm_hw_params_set_periods_integer(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
Restrict a configuration space to contain only integer periods counts.
Definition: pcm.c:5449
snd_pcm_uframes_t snd_pcm_meter_get_now(snd_pcm_t *pcm)
Get meter &quot;now&quot; frame pointer from a SND_PCM_TYPE_METER PCM.
Definition: pcm_meter.c:921
Definition: pcm.h:568
Definition: pcm.h:432
snd_pcm_format_t
Definition: pcm.h:125
const char * snd_pcm_chmap_long_name(enum snd_pcm_chmap_position val)
Definition: pcm.c:8116
long snd_pcm_sframes_t
Definition: pcm.h:376
Definition: pcm.h:297
Definition: pcm.h:155
int snd_pcm_hw_params_test_rate(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)
Verify if a rate is available inside a configuration space for a PCM.
Definition: pcm.c:4591
Definition: pcm.h:406
Definition: pcm.h:575
int snd_pcm_hw_params_test_buffer_size(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val)
Verify if a buffer size is available inside a configuration space for a PCM.
Definition: pcm.c:5712
Definition: pcm.h:205
Definition: pcm.h:175
int snd_pcm_open_lconf(snd_pcm_t **pcm, const char *name, snd_pcm_stream_t stream, int mode, snd_config_t *lconf)
Opens a PCM using local configuration.
Definition: pcm.c:2611
Definition: pcm.h:305
const char * snd_pcm_tstamp_mode_name(const snd_pcm_tstamp_t mode)
get name of PCM tstamp mode setting
Definition: pcm.c:2132
const char * snd_pcm_chmap_type_name(enum snd_pcm_chmap_type val)
Definition: pcm.c:8030
int snd_pcm_hw_params_get_channels_min(const snd_pcm_hw_params_t *params, unsigned int *val)
Extract minimum channels count from a configuration space.
Definition: pcm.c:4396
int snd_pcm_mmap_begin(snd_pcm_t *pcm, const snd_pcm_channel_area_t **areas, snd_pcm_uframes_t *offset, snd_pcm_uframes_t *frames)
Application request to access a portion of direct (mmap) area.
Definition: pcm.c:7108
int snd_pcm_meter_add_scope(snd_pcm_t *pcm, snd_pcm_scope_t *scope)
Add a scope to a SND_PCM_TYPE_METER PCM.
Definition: pcm_meter.c:844
Definition: pcm.h:590
Definition: pcm.h:244
void snd_pcm_format_mask_none(snd_pcm_format_mask_t *mask)
reset all bits in a snd_pcm_format_mask_t
Definition: pcm.c:3880
void snd_pcm_hw_params_free(snd_pcm_hw_params_t *obj)
frees a previously allocated snd_pcm_hw_params_t
Definition: pcm.c:4066
int snd_pcm_hw_params_get_access(const snd_pcm_hw_params_t *params, snd_pcm_access_t *_access)
Extract access type from a configuration space.
Definition: pcm.c:4092
int snd_pcm_hw_params_set_subformat(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_t subformat)
Restrict a configuration space to contain only one subformat.
Definition: pcm.c:4312
Definition: pcm.h:353
void snd_pcm_access_mask_copy(snd_pcm_access_mask_t *dst, const snd_pcm_access_mask_t *src)
copy one snd_pcm_access_mask_t to another
Definition: pcm.c:3768
Definition: pcm.h:242
void snd_pcm_info_set_stream(snd_pcm_info_t *obj, snd_pcm_stream_t val)
Set wanted stream inside a PCM info container (see snd_ctl_pcm_info)
Definition: pcm.c:7082
struct _snd_pcm_scope snd_pcm_scope_t
Definition: pcm.h:488
size_t snd_pcm_hw_params_sizeof(void)
get size of snd_pcm_hw_params_t
Definition: pcm.c:4043
int snd_pcm_hw_params_set_tick_time_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated))
(DEPRECATED) Restrict a configuration space to have tick time nearest to a target ...
Definition: pcm.c:5989
int snd_pcm_hw_params_get_rate_min(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Extract minimum rate from a configuration space.
Definition: pcm.c:4557
snd_pcm_sframes_t snd_pcm_avail(snd_pcm_t *pcm)
Return number of frames ready to be read (capture) / written (playback)
Definition: pcm.c:2872
int snd_pcm_sw_params_set_avail_min(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val)
Set avail min inside a software configuration container.
Definition: pcm.c:6382
Definition: pcm.h:399
void snd_pcm_info_set_device(snd_pcm_info_t *obj, unsigned int val)
Set wanted device inside a PCM info container (see snd_ctl_pcm_info)
Definition: pcm.c:7060
int snd_pcm_hw_params_set_rate_resample(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val)
Restrict a configuration space to contain only real hardware rates.
Definition: pcm.c:4722
Definition: pcm.h:578
int snd_pcm_hw_params_set_channels_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)
Restrict a configuration space to contain only its maximum channels count.
Definition: pcm.c:4520
const char * snd_pcm_scope_get_name(snd_pcm_scope_t *scope)
Get name of a SND_PCM_TYPE_METER PCM scope.
Definition: pcm_meter.c:959
int snd_pcm_scope_s16_open(snd_pcm_t *pcm, const char *name, snd_pcm_scope_t **scopep)
Add a s16 pseudo scope to a SND_PCM_TYPE_METER PCM.
Definition: pcm_meter.c:1175
Definition: pcm.h:583
unsigned int snd_pcm_info_get_subdevice(const snd_pcm_info_t *obj)
Get subdevice from a PCM info container.
Definition: pcm.c:6937
Definition: pcm.h:187
int snd_pcm_hw_params_set_period_time_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Restrict a configuration space with a minimum period time.
Definition: pcm.c:4925
unsigned int snd_pcm_info_get_subdevices_count(const snd_pcm_info_t *obj)
Get subdevices count from a PCM info container.
Definition: pcm.c:7025
Definition: pcm.h:588
int snd_pcm_hw_params_get_period_time(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Extract period time from a configuration space.
Definition: pcm.c:4842
const char * snd_pcm_info_get_id(const snd_pcm_info_t *obj)
Get id from a PCM info container.
Definition: pcm.c:6970
int snd_pcm_hw_params_get_tick_time(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated))
(DEPRECATED) Extract tick time from a configuration space
Definition: pcm.c:5854
int snd_pcm_hw_params_get_fifo_size(const snd_pcm_hw_params_t *params)
Get hardware FIFO size info from a configuration space.
Definition: pcm.c:3707
uint8_t snd_pcm_format_silence(snd_pcm_format_t format)
Return 8 bit expressing silence for a PCM sample format.
Definition: pcm_misc.c:594
int snd_pcm_hw_params_set_period_size_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *min, int *mindir, snd_pcm_uframes_t *max, int *maxdir)
Restrict a configuration space to have period sizes in a given range.
Definition: pcm.c:5164
snd_pcm_state_t snd_pcm_status_get_state(const snd_pcm_status_t *obj)
Get state from a PCM status container (see snd_pcm_state)
Definition: pcm.c:6713
int snd_pcm_sw_params_set_stop_threshold(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val)
Set stop threshold inside a software configuration container.
Definition: pcm.c:6531
Definition: pcm.h:454
void snd_pcm_subformat_mask_any(snd_pcm_subformat_mask_t *mask)
set all bits in a snd_pcm_subformat_mask_t
Definition: pcm.c:3992
Definition: pcm.h:410
Definition: pcm.h:83
Definition: pcm.h:173
struct _snd_output snd_output_t
Internal structure for an output object.
Definition: output.h:54
struct timespec snd_htimestamp_t
Definition: global.h:153
int snd_pcm_sw_params_set_xrun_mode(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_xrun_t val) __attribute__((deprecated))
(DEPRECATED) Set xrun mode inside a software configuration container
Definition: pcm.c:6225
uint32_t snd_pcm_format_silence_32(snd_pcm_format_t format)
Return 32 bit expressing silence for a PCM sample format.
Definition: pcm_misc.c:572
void snd_pcm_free_chmaps(snd_pcm_chmap_query_t **maps)
Definition: pcm.c:7974
int snd_pcm_hw_params_set_format(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t val)
Restrict a configuration space to contain only one format.
Definition: pcm.c:4218
void snd_pcm_status_get_htstamp(const snd_pcm_status_t *obj, snd_htimestamp_t *ptr)
Get &quot;now&quot; hi-res timestamp from a PCM status container.
Definition: pcm.c:6775
size_t snd_pcm_access_mask_sizeof(void)
get size of snd_pcm_access_mask_t
Definition: pcm.c:3735
int snd_pcm_hw_params_set_channels(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val)
Restrict a configuration space to contain only one channels count.
Definition: pcm.c:4436
snd_pcm_sframes_t snd_pcm_mmap_readi(snd_pcm_t *pcm, void *buffer, snd_pcm_uframes_t size)
Read interleaved frames from a PCM using direct buffer (mmap)
Definition: pcm_mmap.c:199
snd_pcm_uframes_t snd_pcm_meter_get_bufsize(snd_pcm_t *pcm)
Get meter buffer size from a SND_PCM_TYPE_METER PCM.
Definition: pcm_meter.c:879
void snd_pcm_subformat_mask_copy(snd_pcm_subformat_mask_t *dst, const snd_pcm_subformat_mask_t *src)
copy one snd_pcm_subformat_mask_t to another
Definition: pcm.c:3973
Definition: pcm.h:1286
int snd_pcm_hw_params_set_buffer_time_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Restrict a configuration space with a maximum buffer time.
Definition: pcm.c:5564
void snd_pcm_scope_set_ops(snd_pcm_scope_t *scope, const snd_pcm_scope_ops_t *val)
Set callbacks for a SND_PCM_TYPE_METER PCM scope.
Definition: pcm_meter.c:969
void snd_pcm_subformat_mask_set(snd_pcm_subformat_mask_t *mask, snd_pcm_subformat_t val)
make a subformat present in a snd_pcm_subformat_mask_t
Definition: pcm.c:4023
Definition: pcm.h:141
Definition: pcm.h:567
Definition: pcm.h:209
Definition: pcm.h:191
int snd_pcm_hw_params_is_half_duplex(const snd_pcm_hw_params_t *params)
Check if hardware does half-duplex only.
Definition: pcm.c:3536
Definition: pcm.h:87
Definition: pcm.h:320
void snd_pcm_format_mask_any(snd_pcm_format_mask_t *mask)
set all bits in a snd_pcm_format_mask_t
Definition: pcm.c:3889
int snd_pcm_hw_params_set_period_wakeup(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val)
Restrict a configuration space to settings without period wakeups.
Definition: pcm.c:4801
Definition: pcm.h:585
snd_pcm_sframes_t snd_pcm_readn(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size)
Read non interleaved frames to a PCM.
Definition: pcm.c:1585
void snd_pcm_status_get_trigger_tstamp(const snd_pcm_status_t *obj, snd_timestamp_t *ptr)
Get trigger timestamp from a PCM status container.
Definition: pcm.c:6728
int snd_pcm_hw_params_get_rate_numden(const snd_pcm_hw_params_t *params, unsigned int *rate_num, unsigned int *rate_den)
Get rate exact info from a configuration space.
Definition: pcm.c:3666
Definition: pcm.h:450
int snd_pcm_hw_params_set_tick_time_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated))
(DEPRECATED) Restrict a configuration space with a maximum tick time
Definition: pcm.c:5954
Definition: pcm.h:573
Definition: pcm.h:309
snd_spcm_xrun_type_t
Definition: pcm.h:1274
int snd_pcm_hw_params_set_access_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t *_access)
Restrict a configuration space to contain only its first access type.
Definition: pcm.c:4136
Definition: pcm.h:211
int snd_pcm_sw_params_set_sleep_min(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, unsigned int val) __attribute__((deprecated))
(DEPRECATED) Set minimum number of ticks to sleep inside a software configuration container ...
Definition: pcm.c:6343
snd_pcm_hook_type_t
Definition: pcm.h:1172
snd_pcm_sframes_t snd_pcm_mmap_writei(snd_pcm_t *pcm, const void *buffer, snd_pcm_uframes_t size)
Write interleaved frames to a PCM using direct buffer (mmap)
Definition: pcm_mmap.c:149
int snd_pcm_dump_setup(snd_pcm_t *pcm, snd_output_t *out)
Dump current setup (hardware and software) for PCM.
Definition: pcm.c:2243
snd_pcm_stream_t snd_pcm_stream(snd_pcm_t *pcm)
get stream for a PCM handle
Definition: pcm.c:734
Definition: pcm.h:1267
Definition: pcm.h:559
snd_pcm_sframes_t snd_pcm_avail_update(snd_pcm_t *pcm)
Return number of frames ready to be read (capture) / written (playback)
Definition: pcm.c:2848
snd_pcm_sync_id_t snd_pcm_info_get_sync(const snd_pcm_info_t *obj)
Get hardware synchronization ID from a PCM info container.
Definition: pcm.c:7047
Definition: pcm.h:236
Definition: pcm.h:401
Definition: pcm.h:295
int snd_pcm_hw_params_set_export_buffer(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val)
Restrict a configuration space to allow the buffer to be accessible from outside. ...
Definition: pcm.c:4754
Definition: pcm.h:193
int snd_pcm_hw_params_set_tick_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir) __attribute__((deprecated))
(DEPRECATED) Restrict a configuration space to contain only one tick time
Definition: pcm.c:5924
snd_pcm_t * snd_pcm_hook_get_pcm(snd_pcm_hook_t *hook)
Get PCM handle for a PCM hook.
Definition: pcm_hooks.c:560
snd_pcm_chmap_query_t ** snd_pcm_query_chmaps(snd_pcm_t *pcm)
Definition: pcm.c:7963
snd_pcm_subclass_t snd_pcm_info_get_subclass(const snd_pcm_info_t *obj)
Get subclass from a PCM info container.
Definition: pcm.c:7014
snd_spcm_duplex_type_t
Definition: pcm.h:1282
Definition: pcm.h:252
snd_pcm_class_t snd_pcm_info_get_class(const snd_pcm_info_t *obj)
Get class from a PCM info container.
Definition: pcm.c:7003
int snd_pcm_sw_params_set_tstamp_mode(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_tstamp_t val)
Set timestamp mode inside a software configuration container.
Definition: pcm.c:6273
Definition: pcm.h:438
void snd_pcm_access_mask_none(snd_pcm_access_mask_t *mask)
reset all bits in a snd_pcm_access_mask_t
Definition: pcm.c:3778
struct _snd_pcm_access_mask snd_pcm_access_mask_t
Definition: pcm.h:71
Definition: pcm.h:246
int snd_pcm_set_params(snd_pcm_t *pcm, snd_pcm_format_t format, snd_pcm_access_t access, unsigned int channels, unsigned int rate, int soft_resample, unsigned int latency)
Set the hardware and software parameters in a simple way.
Definition: pcm.c:8459
size_t snd_pcm_subformat_mask_sizeof(void)
get size of snd_pcm_subformat_mask_t
Definition: pcm.c:3940
int snd_pcm_htimestamp(snd_pcm_t *pcm, snd_pcm_uframes_t *avail, snd_htimestamp_t *tstamp)
Obtain last position update hi-res timestamp.
Definition: pcm.c:1142
void * snd_pcm_hook_get_private(snd_pcm_hook_t *hook)
Get callback function private data for a PCM hook.
Definition: pcm_hooks.c:571
int snd_pcm_scope_malloc(snd_pcm_scope_t **ptr)
allocate an invalid snd_pcm_scope_t using standard malloc
Definition: pcm_meter.c:1226
Definition: pcm.h:446
const char * snd_pcm_type_name(snd_pcm_type_t type)
get name of PCM type
Definition: pcm.c:2171
snd_pcm_sframes_t snd_pcm_rewindable(snd_pcm_t *pcm)
Get safe count of frames which can be rewinded.
Definition: pcm.c:1335
snd_pcm_sframes_t snd_pcm_bytes_to_frames(snd_pcm_t *pcm, ssize_t bytes)
Convert bytes in frames for a PCM.
Definition: pcm.c:2291
void snd_pcm_access_mask_set(snd_pcm_access_mask_t *mask, snd_pcm_access_t val)
make an access type present in a snd_pcm_access_mask_t
Definition: pcm.c:3818
int snd_pcm_hw_params_set_tick_time_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated))
(DEPRECATED) Restrict a configuration space to contain only its minimum tick time ...
Definition: pcm.c:6008
const char * snd_pcm_stream_name(const snd_pcm_stream_t stream)
get name of PCM stream type
Definition: pcm.c:2001
snd_pcm_stream_t snd_pcm_info_get_stream(const snd_pcm_info_t *obj)
Get stream (direction) from a PCM info container.
Definition: pcm.c:6948
struct _snd_pcm_hook snd_pcm_hook_t
Definition: pcm.h:1180
void snd_pcm_status_free(snd_pcm_status_t *obj)
frees a previously allocated snd_pcm_status_t
Definition: pcm.c:6692
snd_pcm_sframes_t snd_pcm_forwardable(snd_pcm_t *pcm)
Get safe count of frames which can be forwarded.
Definition: pcm.c:1395
int snd_pcm_sw_params_get_tstamp_type(const snd_pcm_sw_params_t *params, snd_pcm_tstamp_type_t *val)
Get timestamp type from a software configuration container.
Definition: pcm.c:6326
int snd_pcm_hw_params_get_rate(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Extract rate from a configuration space.
Definition: pcm.c:4539
int snd_pcm_dump_hw_setup(snd_pcm_t *pcm, snd_output_t *out)
Dump current hardware setup for PCM.
Definition: pcm.c:2186
ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples)
Return bytes needed to store a quantity of PCM sample.
Definition: pcm_misc.c:342
int snd_pcm_hw_params_can_sync_start(const snd_pcm_hw_params_t *params)
Check if hardware supports synchronized start with sample resolution.
Definition: pcm.c:3576
Definition: pcm.h:103
const char * snd_pcm_name(snd_pcm_t *pcm)
get identifier of PCM handle
Definition: pcm.c:708
int snd_pcm_hw_params_set_access_mask(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_mask_t *mask)
Restrict a configuration space to contain only a set of access types.
Definition: pcm.c:4165
int snd_pcm_hw_params_set_tick_time_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir) __attribute__((deprecated))
(DEPRECATED) Restrict a configuration space to have tick times in a given range
Definition: pcm.c:5971
Definition: pcm.h:195
int snd_pcm_sw_params_get_stop_threshold(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val)
Get stop threshold from a software configuration container.
Definition: pcm.c:6553
uint16_t snd_pcm_format_silence_16(snd_pcm_format_t format)
Return 16 bit expressing silence for a PCM sample format.
Definition: pcm_misc.c:583
long snd_pcm_bytes_to_samples(snd_pcm_t *pcm, ssize_t bytes)
Convert bytes in samples for a PCM.
Definition: pcm.c:2323
int snd_pcm_hw_params_set_buffer_size_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)
Restrict a configuration space with a minimum buffer size.
Definition: pcm.c:5738
int snd_pcm_hw_params_test_access(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t _access)
Verify if an access type is available inside a configuration space for a PCM.
Definition: pcm.c:4109
int snd_pcm_hw_params_get_buffer_time_max(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Extract maximum buffer time from a configuration space.
Definition: pcm.c:5503
Definition: pcm.h:412
int snd_pcm_hw_params_can_resume(const snd_pcm_hw_params_t *params)
Check if hardware supports resume.
Definition: pcm.c:3516
Definition: pcm.h:301
snd_pcm_state_t snd_pcm_state(snd_pcm_t *pcm)
Return PCM state.
Definition: pcm.c:1020
snd_pcm_tstamp_type_t
Definition: pcm.h:346
int snd_pcm_hw_params_get_subformat(const snd_pcm_hw_params_t *params, snd_pcm_subformat_t *subformat)
Extract subformat from a configuration space.
Definition: pcm.c:4287
int snd_pcm_hw_params_set_buffer_size_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)
Restrict a configuration space to contain only its minimum buffer size.
Definition: pcm.c:5811
snd_pcm_uframes_t snd_pcm_status_get_overrange(const snd_pcm_status_t *obj)
Get count of ADC overrange detections since last call.
Definition: pcm.c:6872
Definition: pcm.h:179
Definition: pcm.h:444
int snd_pcm_sw_params_current(snd_pcm_t *pcm, snd_pcm_sw_params_t *params)
Return current software configuration for a PCM.
Definition: pcm.c:6070
Definition: pcm.h:234
Definition: pcm.h:81
int snd_pcm_resume(snd_pcm_t *pcm)
Resume from suspend, no samples are lost.
Definition: pcm.c:1119
int snd_pcm_format_mask_malloc(snd_pcm_format_mask_t **ptr)
allocate an empty snd_pcm_format_mask_t using standard malloc
Definition: pcm.c:3847
snd_pcm_sframes_t snd_pcm_writen(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size)
Write non interleaved frames to a PCM.
Definition: pcm.c:1507
int snd_pcm_format_signed(snd_pcm_format_t format)
Return sign info for a PCM sample linear format.
Definition: pcm_misc.c:35
int snd_pcm_hw_params_set_rate_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Restrict a configuration space with a maximum rate.
Definition: pcm.c:4636
int snd_pcm_hw_params_set_rate_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Restrict a configuration space to contain only its maximum rate.
Definition: pcm.c:4709
Definition: pcm.h:582
snd_pcm_t * snd_async_handler_get_pcm(snd_async_handler_t *handler)
Return PCM handle related to an async handler.
Definition: pcm.c:2389
int snd_pcm_prepare(snd_pcm_t *pcm)
Prepare PCM for use.
Definition: pcm.c:1164
Definition: pcm.h:430
int snd_pcm_info_get_card(const snd_pcm_info_t *obj)
Get card from a PCM info container.
Definition: pcm.c:6959
Definition: pcm.h:153
snd_pcm_uframes_t snd_pcm_meter_get_boundary(snd_pcm_t *pcm)
Get boundary for frame pointers from a SND_PCM_TYPE_METER PCM.
Definition: pcm_meter.c:935
Definition: pcm.h:303
Definition: pcm.h:118
int snd_spcm_init(snd_pcm_t *pcm, unsigned int rate, unsigned int channels, snd_pcm_format_t format, snd_pcm_subformat_t subformat, snd_spcm_latency_t latency, snd_pcm_access_t _access, snd_spcm_xrun_type_t xrun_type)
Set up a simple PCM.
Definition: pcm_simple.c:157
struct _snd_async_handler snd_async_handler_t
Internal structure for an async notification client handler.
Definition: global.h:114
int snd_pcm_format_cpu_endian(snd_pcm_format_t format)
Return endian info for a PCM sample format.
Definition: pcm_misc.c:196
Definition: pcm.h:199
int snd_pcm_drain(snd_pcm_t *pcm)
Stop a PCM preserving pending frames.
Definition: pcm.c:1278
Definition: pcm.h:240
Definition: pcm.h:85
void snd_pcm_sw_params_free(snd_pcm_sw_params_t *obj)
frees a previously allocated snd_pcm_sw_params_t
Definition: pcm.c:6142
int snd_pcm_hw_params_set_periods_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Restrict a configuration space to contain only its maximum periods count.
Definition: pcm.c:5437
struct timeval snd_timestamp_t
Definition: global.h:151
int snd_pcm_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
Install one PCM hardware configuration chosen from a configuration space and snd_pcm_prepare it...
Definition: pcm.c:903
int snd_pcm_format_physical_width(snd_pcm_format_t format)
Return bits needed to store a PCM sample.
Definition: pcm_misc.c:277
int snd_pcm_hw_params_test_period_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)
Verify if a period time is available inside a configuration space for a PCM.
Definition: pcm.c:4894
Definition: pcm.h:565
Definition: pcm.h:94
int snd_pcm_hw_params_set_periods_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Restrict a configuration space with a maximum periods count.
Definition: pcm.c:5364
Definition: pcm.h:171
Definition: pcm.h:586
int(* snd_pcm_hook_func_t)(snd_pcm_hook_t *hook)
Definition: pcm.h:1182
int snd_pcm_pause(snd_pcm_t *pcm, int enable)
Pause/resume PCM.
Definition: pcm.c:1306
Definition: pcm.h:359
int snd_pcm_hw_params_set_buffer_time_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir)
Restrict a configuration space to have buffer times in a given range.
Definition: pcm.c:5581
int snd_pcm_hw_params_set_buffer_size_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)
Restrict a configuration space with a maximum buffer size.
Definition: pcm.c:5754
int snd_pcm_hw_free(snd_pcm_t *pcm)
Remove PCM hardware configuration and free associated resources.
Definition: pcm.c:918
int snd_pcm_sw_params(snd_pcm_t *pcm, snd_pcm_sw_params_t *params)
Install PCM software configuration defined by params.
Definition: pcm.c:948
int snd_pcm_subformat_mask_malloc(snd_pcm_subformat_mask_t **ptr)
allocate an empty snd_pcm_subformat_mask_t using standard malloc
Definition: pcm.c:3950
unsigned int step
Definition: pcm.h:474
Definition: pcm.h:149
int snd_pcm_hw_params_set_periods_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir)
Restrict a configuration space to have periods counts in a given range.
Definition: pcm.c:5381
int snd_pcm_dump(snd_pcm_t *pcm, snd_output_t *out)
Dump PCM info.
Definition: pcm.c:2277
unsigned int snd_pcm_chmap_from_string(const char *str)
Definition: pcm.c:8209
unsigned int snd_pcm_info_get_device(const snd_pcm_info_t *obj)
Get device from a PCM info container.
Definition: pcm.c:6926
int snd_pcm_hw_params_set_period_size_integer(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
Restrict a configuration space to contain only integer period sizes.
Definition: pcm.c:5249
int snd_pcm_link(snd_pcm_t *pcm1, snd_pcm_t *pcm2)
Link two PCMs.
Definition: pcm.c:1613
int snd_pcm_hw_params_set_buffer_time_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Restrict a configuration space to have buffer time nearest to a target.
Definition: pcm.c:5599
Definition: pcm.h:201
const char * snd_pcm_access_name(const snd_pcm_access_t _access)
get name of PCM access type
Definition: pcm.c:2013
Definition: pcm.h:197
Definition: pcm.h:569
const char * snd_pcm_subformat_name(const snd_pcm_subformat_t subformat)
get name of PCM sample subformat
Definition: pcm.c:2076
int snd_pcm_hw_params_set_buffer_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)
Restrict a configuration space to contain only one buffer time.
Definition: pcm.c:5534
int snd_pcm_subformat_mask_test(const snd_pcm_subformat_mask_t *mask, snd_pcm_subformat_t val)
test the presence of a subformat in a snd_pcm_subformat_mask_t
Definition: pcm.c:4002
Definition: pcm.h:404
int snd_pcm_unlink(snd_pcm_t *pcm)
Remove a PCM from a linked group.
Definition: pcm.c:1627
int snd_pcm_reset(snd_pcm_t *pcm)
Reset PCM position.
Definition: pcm.c:1191
void snd_pcm_sw_params_copy(snd_pcm_sw_params_t *dst, const snd_pcm_sw_params_t *src)
copy one snd_pcm_sw_params_t to another
Definition: pcm.c:6152
Definition: pcm.h:460
int snd_pcm_info_malloc(snd_pcm_info_t **ptr)
allocate an invalid snd_pcm_info_t using standard malloc
Definition: pcm.c:6892
snd_pcm_chmap_t * snd_pcm_chmap_parse_string(const char *str)
Definition: pcm.c:8221
Definition: pcm.h:593
snd_pcm_sframes_t snd_pcm_mmap_readn(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size)
Read non interleaved frames to a PCM using direct buffer (mmap)
Definition: pcm_mmap.c:224
int snd_pcm_hw_params_get_period_time_max(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Extract maximum period time from a configuration space.
Definition: pcm.c:4878
int snd_pcm_hw_params_set_period_time_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Restrict a configuration space with a maximum period time.
Definition: pcm.c:4940
Definition: pcm.h:478
const char * snd_pcm_format_name(const snd_pcm_format_t format)
get name of PCM sample format
Definition: pcm.c:2025
int snd_pcm_hw_params_set_channels_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)
Restrict a configuration space with a minimum channels count.
Definition: pcm.c:4448
int snd_pcm_hw_params_get_format(const snd_pcm_hw_params_t *params, snd_pcm_format_t *val)
Extract format from a configuration space.
Definition: pcm.c:4193
snd_pcm_format_t snd_pcm_build_linear_format(int width, int pwidth, int unsignd, int big_endian)
Compose a PCM sample linear format.
Definition: pcm_misc.c:716
void snd_pcm_status_copy(snd_pcm_status_t *dst, const snd_pcm_status_t *src)
copy one snd_pcm_status_t to another
Definition: pcm.c:6702
int snd_pcm_hook_add(snd_pcm_hook_t **hookp, snd_pcm_t *pcm, snd_pcm_hook_type_t type, snd_pcm_hook_func_t func, void *private_data)
Add a PCM hook at end of hooks chain.
Definition: pcm_hooks.c:600
int snd_pcm_hw_params_can_overrange(const snd_pcm_hw_params_t *params)
Check if hardware supports overrange detection.
Definition: pcm.c:3476
Definition: pcm.h:318
int snd_pcm_hw_params_is_batch(const snd_pcm_hw_params_t *params)
Check if hardware does double buffering for data transfers for given configuration.
Definition: pcm.c:3416
Definition: pcm.h:157
int snd_pcm_hw_params_get_min_align(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)
Get the minimum transfer align value in samples.
Definition: pcm.c:6039
int snd_async_add_pcm_handler(snd_async_handler_t **handler, snd_pcm_t *pcm, snd_async_callback_t callback, void *private_data)
Add an async handler for a PCM.
Definition: pcm.c:2359
int snd_pcm_hw_params_set_tick_time_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated))
(DEPRECATED) Restrict a configuration space with a minimum tick time
Definition: pcm.c:5939
Definition: pcm.h:562
unsigned int snd_pcm_info_get_subdevices_avail(const snd_pcm_info_t *obj)
Get available subdevices count from a PCM info container.
Definition: pcm.c:7036
int snd_pcm_format_mask_empty(const snd_pcm_format_mask_t *mask)
test, if given a snd_pcm_format_mask_t is empty
Definition: pcm.c:3910
int snd_pcm_recover(snd_pcm_t *pcm, int err, int silent)
Recover the stream state from an error or suspend.
Definition: pcm.c:8411
snd_pcm_tstamp_t
Definition: pcm.h:334
int snd_spcm_init_duplex(snd_pcm_t *playback_pcm, snd_pcm_t *capture_pcm, unsigned int rate, unsigned int channels, snd_pcm_format_t format, snd_pcm_subformat_t subformat, snd_spcm_latency_t latency, snd_pcm_access_t _access, snd_spcm_xrun_type_t xrun_type, snd_spcm_duplex_type_t duplex_type)
Initialize simple PCMs in the duplex mode.
Definition: pcm_simple.c:209
Definition: pcm.h:181
int snd_pcm_hw_params_set_periods_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Restrict a configuration space to have periods count nearest to a target.
Definition: pcm.c:5399
snd_pcm_chmap_position
Definition: pcm.h:558
struct _snd_pcm_format_mask snd_pcm_format_mask_t
Definition: pcm.h:73
Definition: pcm.h:254
unsigned int first
Definition: pcm.h:472
int snd_pcm_hw_params_set_channels_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)
Restrict a configuration space to contain only its minimum channels count.
Definition: pcm.c:4504
int snd_pcm_hw_params_set_buffer_time_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Restrict a configuration space with a minimum buffer time.
Definition: pcm.c:5549
struct _snd_config snd_config_t
Internal structure for a configuration node object.
Definition: conf.h:69
int snd_pcm_hw_params_set_periods(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)
Restrict a configuration space to contain only one periods count.
Definition: pcm.c:5334
int snd_pcm_hw_params_any(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
Fill params with a full configuration space for a PCM.
Definition: pcm.c:3725
void snd_pcm_scope_set_callback_private(snd_pcm_scope_t *scope, void *val)
Get callbacks private value for a SND_PCM_TYPE_METER PCM scope.
Definition: pcm_meter.c:989
int snd_pcm_hw_params_get_period_time_min(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Extract minimum period time from a configuration space.
Definition: pcm.c:4860
Definition: pcm.h:342
void snd_pcm_subformat_mask_none(snd_pcm_subformat_mask_t *mask)
reset all bits in a snd_pcm_subformat_mask_t
Definition: pcm.c:3983
int snd_pcm_sw_params_set_silence_size(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val)
Set silence size inside a software configuration container.
Definition: pcm.c:6630
Definition: pcm.h:348
snd_pcm_sframes_t snd_pcm_forward(snd_pcm_t *pcm, snd_pcm_uframes_t frames)
Move application frame position forward.
Definition: pcm.c:1426
Definition: pcm.h:207
Definition: pcm.h:183
int snd_pcm_hw_params_set_period_size_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir)
Restrict a configuration space to contain only its maximum period size.
Definition: pcm.c:5233
int snd_pcm_sw_params_get_sleep_min(const snd_pcm_sw_params_t *params, unsigned int *val) __attribute__((deprecated))
(DEPRECATED) Get minimum numbers of ticks to sleep from a software configuration container ...
Definition: pcm.c:6358
Definition: pcm.h:572
Definition: pcm.h:436
int snd_pcm_sw_params_set_start_mode(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_start_t val) __attribute__((deprecated))
(DEPRECATED) Set start mode inside a software configuration container
Definition: pcm.c:6178
ssize_t snd_pcm_frames_to_bytes(snd_pcm_t *pcm, snd_pcm_sframes_t frames)
Convert frames in bytes for a PCM.
Definition: pcm.c:2307
int snd_pcm_sw_params_set_silence_threshold(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val)
Set silence threshold inside a software configuration container.
Definition: pcm.c:6576
Definition: pcm.h:552
int snd_pcm_hw_params_set_format_mask(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_mask_t *mask)
Restrict a configuration space to contain only a set of formats.
Definition: pcm.c:4262
Definition: pcm.h:327
int snd_pcm_hw_params_set_period_time_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Restrict a configuration space to have period time nearest to a target.
Definition: pcm.c:4975
int snd_pcm_hw_params_set_access(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t _access)
Restrict a configuration space to contain only one access type.
Definition: pcm.c:4121
int snd_pcm_sw_params_get_period_event(const snd_pcm_sw_params_t *params, int *val)
Get period event from a software configuration container.
Definition: pcm.c:6435
int snd_pcm_hw_params_test_channels(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val)
Verify if a channels count is available inside a configuration space for a PCM.
Definition: pcm.c:4424
unsigned int snd_pcm_meter_get_rate(snd_pcm_t *pcm)
Get meter rate from a SND_PCM_TYPE_METER PCM.
Definition: pcm_meter.c:907
void snd_pcm_status_set_audio_htstamp_config(snd_pcm_status_t *obj, snd_pcm_audio_tstamp_config_t *audio_tstamp_config)
set audio_tstamp_config from a PCM status container
Definition: pcm.c:6825
int snd_pcm_hw_params_set_channels_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)
Restrict a configuration space to have channels count nearest to a target.
Definition: pcm.c:4488
int snd_pcm_hw_params_get_sbits(const snd_pcm_hw_params_t *params)
Get sample resolution info from a configuration space.
Definition: pcm.c:3688
int snd_pcm_area_silence(const snd_pcm_channel_area_t *dst_channel, snd_pcm_uframes_t dst_offset, unsigned int samples, snd_pcm_format_t format)
Silence an area.
Definition: pcm.c:2942
int snd_pcm_hw_params_set_period_time_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Restrict a configuration space to contain only its maximum period time.
Definition: pcm.c:5011
const char * snd_pcm_info_get_name(const snd_pcm_info_t *obj)
Get name from a PCM info container.
Definition: pcm.c:6981
snd_spcm_latency_t
Definition: pcm.h:1261
Definition: pcm.h:137
int snd_pcm_open(snd_pcm_t **pcm, const char *name, snd_pcm_stream_t stream, int mode)
Opens a PCM.
Definition: pcm.c:2587
int snd_pcm_poll_descriptors(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int space)
get poll descriptors
Definition: pcm.c:1708
Definition: pcm.h:584
int snd_pcm_sw_params_set_start_threshold(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val)
Set start threshold inside a software configuration container.
Definition: pcm.c:6487
Definition: pcm.h:185
Definition: pcm.h:293
void snd_pcm_access_mask_reset(snd_pcm_access_mask_t *mask, snd_pcm_access_t val)
make an access type missing from a snd_pcm_access_mask_t
Definition: pcm.c:3828
int snd_pcm_hw_params_get_channels_max(const snd_pcm_hw_params_t *params, unsigned int *val)
Extract maximum channels count from a configuration space.
Definition: pcm.c:4411
int snd_pcm_access_mask_test(const snd_pcm_access_mask_t *mask, snd_pcm_access_t val)
test the presence of an access type in a snd_pcm_access_mask_t
Definition: pcm.c:3797
snd_pcm_sframes_t snd_pcm_writei(snd_pcm_t *pcm, const void *buffer, snd_pcm_uframes_t size)
Write interleaved frames to a PCM.
Definition: pcm.c:1468
int snd_pcm_hw_params_get_buffer_size_min(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)
Extract minimum buffer size from a configuration space.
Definition: pcm.c:5672
int snd_pcm_hw_params_is_monotonic(const snd_pcm_hw_params_t *params)
Check if timestamps are monotonic for given configuration.
Definition: pcm.c:3456
Definition: pcm.h:551
void snd_pcm_status_get_audio_htstamp(const snd_pcm_status_t *obj, snd_htimestamp_t *ptr)
Get &quot;now&quot; hi-res audio timestamp from a PCM status container.
Definition: pcm.c:6788
int snd_pcm_hw_params_set_rate_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir)
Restrict a configuration space to have rates in a given range.
Definition: pcm.c:4653
int snd_pcm_sw_params_get_silence_size(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val)
Get silence size from a software configuration container.
Definition: pcm.c:6656
snd_pcm_sframes_t snd_pcm_mmap_commit(snd_pcm_t *pcm, snd_pcm_uframes_t offset, snd_pcm_uframes_t frames)
Application has completed the access to area requested with snd_pcm_mmap_begin.
Definition: pcm.c:7207
int snd_pcm_format_little_endian(snd_pcm_format_t format)
Return endian info for a PCM sample format.
Definition: pcm_misc.c:128
int snd_pcm_hw_params_current(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
Retreive current PCM hardware configuration chosen with snd_pcm_hw_params.
Definition: pcm.c:852
unsigned long snd_pcm_uframes_t
Definition: pcm.h:374
snd_pcm_uframes_t snd_pcm_status_get_avail(const snd_pcm_status_t *obj)
Get number of frames available from a PCM status container (see snd_pcm_avail_update) ...
Definition: pcm.c:6852
snd_pcm_chmap_t * snd_pcm_get_chmap(snd_pcm_t *pcm)
Definition: pcm.c:7991
int snd_pcm_format_mask_test(const snd_pcm_format_mask_t *mask, snd_pcm_format_t val)
test the presence of a format in a snd_pcm_format_mask_t
Definition: pcm.c:3899
snd_pcm_sframes_t snd_pcm_mmap_writen(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size)
Write non interleaved frames to a PCM using direct buffer (mmap)
Definition: pcm_mmap.c:174
Definition: pcm.h:576
Definition: pcm.h:329
int snd_pcm_hw_params_set_channels_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, unsigned int *max)
Restrict a configuration space to have channels counts in a given range.
Definition: pcm.c:4473
int snd_pcm_hw_params_get_period_size_max(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *frames, int *dir)
Extract maximum period size from a configuration space.
Definition: pcm.c:5074
Definition: pcm.h:129
int snd_pcm_hw_params_set_period_time_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir)
Restrict a configuration space to have period times in a given range.
Definition: pcm.c:4957
int snd_pcm_hw_params_get_channels(const snd_pcm_hw_params_t *params, unsigned int *val)
Extract channels from a configuration space.
Definition: pcm.c:4381
const char * snd_pcm_subformat_description(const snd_pcm_subformat_t subformat)
get description of PCM sample subformat
Definition: pcm.c:2088
snd_pcm_chmap_query_t ** snd_pcm_query_chmaps_from_hw(int card, int dev, int subdev, snd_pcm_stream_t stream)
Definition: pcm_hw.c:1200
void * ptr
Definition: seq_event.h:199
int snd_pcm_hw_params_is_double(const snd_pcm_hw_params_t *params)
Check if hardware does double buffering for start/stop for given configuration.
Definition: pcm.c:3396
int snd_pcm_hw_params_set_tick_time_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated))
(DEPRECATED) Restrict a configuration space to contain only its maximum tick time ...
Definition: pcm.c:6027
int snd_pcm_sw_params_get_silence_threshold(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val)
Get silence threshold from a software configuration container.
Definition: pcm.c:6602
int snd_pcm_avail_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *availp, snd_pcm_sframes_t *delayp)
Combine snd_pcm_avail and snd_pcm_delay functions.
Definition: pcm.c:2903
int snd_pcm_hw_params_get_periods_max(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Extract maximum periods count from a configuration space.
Definition: pcm.c:5303
int snd_pcm_hw_params_set_period_size_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir)
Restrict a configuration space to have period size nearest to a target.
Definition: pcm.c:5187
int snd_pcm_poll_descriptors_revents(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)
get returned events from poll descriptors
Definition: pcm.c:1743
Definition: pcm.h:96
snd_pcm_sframes_t snd_pcm_readi(snd_pcm_t *pcm, void *buffer, snd_pcm_uframes_t size)
Read interleaved frames from a PCM.
Definition: pcm.c:1546
int snd_pcm_dump_sw_setup(snd_pcm_t *pcm, snd_output_t *out)
Dump current software setup for PCM.
Definition: pcm.c:2216
void snd_pcm_format_mask_copy(snd_pcm_format_mask_t *dst, const snd_pcm_format_mask_t *src)
copy one snd_pcm_format_mask_t to another
Definition: pcm.c:3870
int snd_pcm_hw_params_set_rate(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)
Restrict a configuration space to contain only one rate.
Definition: pcm.c:4606
snd_pcm_format_t snd_pcm_format_value(const char *name)
get PCM sample format from name
Definition: pcm.c:2049
Definition: pcm.h:248
Definition: pcm.h:561
snd_pcm_stream_t
Definition: pcm.h:101
int snd_pcm_sw_params_set_period_event(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, int val)
Set period event inside a software configuration container.
Definition: pcm.c:6422
int snd_pcm_sw_params_set_tstamp_type(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_tstamp_type_t val)
Set timestamp type inside a software configuration container.
Definition: pcm.c:6309
int snd_pcm_format_big_endian(snd_pcm_format_t format)
Return endian info for a PCM sample format.
Definition: pcm_misc.c:181
int snd_pcm_open_fallback(snd_pcm_t **pcm, snd_config_t *root, const char *name, const char *orig_name, snd_pcm_stream_t stream, int mode)
Opens a fallback PCM.
Definition: pcm.c:2629
Definition: pcm.h:177
int snd_pcm_hw_params_set_subformat_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_t *subformat)
Restrict a configuration space to contain only its first subformat.
Definition: pcm.c:4327
int snd_pcm_hw_params_set_buffer_time_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Restrict a configuration space to contain only its maximum buffered time.
Definition: pcm.c:5637
Definition: pcm.h:564
Definition: pcm.h:595
Definition: pcm.h:566
int snd_pcm_hw_params_can_disable_period_wakeup(const snd_pcm_hw_params_t *params)
Check if hardware can disable period wakeups.
Definition: pcm.c:3592
Definition: pcm.h:448
enum _snd_pcm_type snd_pcm_type_t
Definition: pcm.h:465
Definition: pcm.h:587
Definition: pcm.h:1201
Definition: pcm.h:1264
void snd_pcm_info_copy(snd_pcm_info_t *dst, const snd_pcm_info_t *src)
copy one snd_pcm_info_t to another
Definition: pcm.c:6915
size_t snd_pcm_sw_params_sizeof(void)
get size of snd_pcm_sw_params_t
Definition: pcm.c:6119
int snd_pcm_area_copy(const snd_pcm_channel_area_t *dst_channel, snd_pcm_uframes_t dst_offset, const snd_pcm_channel_area_t *src_channel, snd_pcm_uframes_t src_offset, unsigned int samples, snd_pcm_format_t format)
Copy an area.
Definition: pcm.c:3108
void snd_pcm_info_set_subdevice(snd_pcm_info_t *obj, unsigned int val)
Set wanted subdevice inside a PCM info container (see snd_ctl_pcm_info)
Definition: pcm.c:7071
Definition: pcm.h:574
int snd_pcm_hw_params_supports_audio_wallclock_ts(const snd_pcm_hw_params_t *params)
Check if hardware supports audio wallclock timestamps.
Definition: pcm.c:3612
Definition: pcm.h:577
struct _snd_pcm snd_pcm_t
Definition: pcm.h:394
int snd_pcm_hw_params_get_buffer_time_min(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
Extract minimum buffer time from a configuration space.
Definition: pcm.c:5485
int snd_pcm_hw_params_get_access_mask(snd_pcm_hw_params_t *params, snd_pcm_access_mask_t *mask)
Get access mask from a configuration space.
Definition: pcm.c:4175
ssize_t snd_pcm_samples_to_bytes(snd_pcm_t *pcm, long samples)
Convert samples in bytes for a PCM.
Definition: pcm.c:2339
int snd_pcm_hw_params_test_period_size(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val, int dir)
Verify if a period size is available inside a configuration space for a PCM.
Definition: pcm.c:5094
unsigned int channels
Definition: pcm.h:609
snd_pcm_sframes_t snd_pcm_status_get_delay(const snd_pcm_status_t *obj)
Get delay from a PCM status container (see snd_pcm_delay)
Definition: pcm.c:6842
void snd_pcm_status_get_audio_htstamp_report(const snd_pcm_status_t *obj, snd_pcm_audio_tstamp_report_t *audio_tstamp_report)
Get audio_tstamp_report from a PCM status container.
Definition: pcm.c:6811
snd_pcm_sframes_t snd_pcm_rewind(snd_pcm_t *pcm, snd_pcm_uframes_t frames)
Move application frame position backward.
Definition: pcm.c:1363
snd_pcm_xrun_t snd_pcm_sw_params_get_xrun_mode(const snd_pcm_sw_params_t *params) __attribute__((deprecated))
(DEPRECATED) Get xrun mode from a software configuration container
Definition: pcm.c:6252
int snd_pcm_access_mask_malloc(snd_pcm_access_mask_t **ptr)
allocate an empty snd_pcm_access_mask_t using standard malloc
Definition: pcm.c:3745
Definition: pcm.h:159
int snd_pcm_format_linear(snd_pcm_format_t format)
Return linear info for a PCM sample format.
Definition: pcm_misc.c:100
int snd_pcm_sw_params_malloc(snd_pcm_sw_params_t **ptr)
allocate an invalid snd_pcm_sw_params_t using standard malloc
Definition: pcm.c:6129
int snd_pcm_hw_params_set_period_size(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val, int dir)
Restrict a configuration space to contain only one period size.
Definition: pcm.c:5109
snd_pcm_access_t
Definition: pcm.h:110
int snd_pcm_hw_params_set_period_size_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir)
Restrict a configuration space to contain only its minimum period size.
Definition: pcm.c:5210
Definition: pcm.h:116
int snd_pcm_sw_params_get_start_threshold(const snd_pcm_sw_params_t *paramsm, snd_pcm_uframes_t *val)
Get start threshold from a software configuration container.
Definition: pcm.c:6507
Definition: pcm.h:422
const char * snd_pcm_state_name(const snd_pcm_state_t state)
get name of PCM state
Definition: pcm.c:2156