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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
33extern "C" {
34#endif
35
36#include <stdint.h>
37
45#define SND_PCM_DLSYM_VERSION _dlsym_pcm_001
46
48typedef struct _snd_pcm_info snd_pcm_info_t;
49
64typedef struct _snd_pcm_hw_params snd_pcm_hw_params_t;
65
67typedef struct _snd_pcm_sw_params snd_pcm_sw_params_t;
69 typedef struct _snd_pcm_status snd_pcm_status_t;
71typedef struct _snd_pcm_access_mask snd_pcm_access_mask_t;
73typedef struct _snd_pcm_format_mask snd_pcm_format_mask_t;
75typedef struct _snd_pcm_subformat_mask snd_pcm_subformat_mask_t;
76
90
92typedef enum _snd_pcm_subclass {
97 SND_PCM_SUBCLASS_LAST = SND_PCM_SUBCLASS_MULTI_MIX
99
101typedef enum _snd_pcm_stream {
106 SND_PCM_STREAM_LAST = SND_PCM_STREAM_CAPTURE
108
123
125typedef 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
255#elif __BYTE_ORDER == __BIG_ENDIAN
278#else
279#error "Unknown endian"
280#endif
282
297
322
324typedef enum _snd_pcm_start {
329 SND_PCM_START_LAST = SND_PCM_START_EXPLICIT
331
333typedef enum _snd_pcm_xrun {
338 SND_PCM_XRUN_LAST = SND_PCM_XRUN_STOP
340
353
361
376
378typedef struct _snd_pcm_audio_tstamp_config {
379 /* 5 of max 16 bits used */
380 unsigned int type_requested:4;
381 unsigned int report_delay:1;
383
385typedef struct _snd_pcm_audio_tstamp_report {
386 /* 6 of max 16 bits used for bit-fields */
387
388 unsigned int valid:1;
389 unsigned int actual_type:4;
391 unsigned int accuracy_report:1;
392 unsigned int accuracy;
394
396typedef unsigned long snd_pcm_uframes_t;
398typedef long snd_pcm_sframes_t;
399
401#define SND_PCM_NONBLOCK 0x00000001
403#define SND_PCM_ASYNC 0x00000002
405#define SND_PCM_EINTR 0x00000080
407#define SND_PCM_ABORT 0x00008000
409#define SND_PCM_NO_AUTO_RESAMPLE 0x00010000
411#define SND_PCM_NO_AUTO_CHANNELS 0x00020000
413#define SND_PCM_NO_AUTO_FORMAT 0x00040000
415#define SND_PCM_NO_SOFTVOL 0x00080000
416
418typedef struct _snd_pcm snd_pcm_t;
419
487
490
492typedef struct _snd_pcm_channel_area {
494 void *addr;
496 unsigned int first;
498 unsigned int step;
500
502typedef union _snd_pcm_sync_id {
504 unsigned char id[16];
506 unsigned short id16[8];
508 unsigned int id32[4];
510
512#define SND_PCM_WAIT_INFINITE (-1)
514#define SND_PCM_WAIT_IO (-10001)
516#define SND_PCM_WAIT_DRAIN (-10002)
517
519typedef struct _snd_pcm_scope snd_pcm_scope_t;
520
521int snd_pcm_open(snd_pcm_t **pcm, const char *name,
522 snd_pcm_stream_t stream, int mode);
523int snd_pcm_open_lconf(snd_pcm_t **pcm, const char *name,
524 snd_pcm_stream_t stream, int mode,
525 snd_config_t *lconf);
527 const char *name, const char *orig_name,
528 snd_pcm_stream_t stream, int mode);
529
530int snd_pcm_close(snd_pcm_t *pcm);
531const char *snd_pcm_name(snd_pcm_t *pcm);
535int snd_pcm_poll_descriptors(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int space);
536int snd_pcm_poll_descriptors_revents(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
537int snd_pcm_nonblock(snd_pcm_t *pcm, int nonblock);
538static __inline__ int snd_pcm_abort(snd_pcm_t *pcm) { return snd_pcm_nonblock(pcm, 2); }
540 snd_async_callback_t callback, void *private_data);
542int snd_pcm_info(snd_pcm_t *pcm, snd_pcm_info_t *info);
545int snd_pcm_hw_free(snd_pcm_t *pcm);
548int snd_pcm_prepare(snd_pcm_t *pcm);
549int snd_pcm_reset(snd_pcm_t *pcm);
550int snd_pcm_status(snd_pcm_t *pcm, snd_pcm_status_t *status);
551int snd_pcm_start(snd_pcm_t *pcm);
552int snd_pcm_drop(snd_pcm_t *pcm);
553int snd_pcm_drain(snd_pcm_t *pcm);
554int snd_pcm_pause(snd_pcm_t *pcm, int enable);
556int snd_pcm_hwsync(snd_pcm_t *pcm);
557int snd_pcm_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp);
558int snd_pcm_resume(snd_pcm_t *pcm);
567snd_pcm_sframes_t snd_pcm_writei(snd_pcm_t *pcm, const void *buffer, snd_pcm_uframes_t size);
571int snd_pcm_wait(snd_pcm_t *pcm, int timeout);
572
573int snd_pcm_link(snd_pcm_t *pcm1, snd_pcm_t *pcm2);
574int snd_pcm_unlink(snd_pcm_t *pcm);
575
577#define SND_CHMAP_API_VERSION ((1 << 16) | (0 << 8) | 1)
578
587
629
631#define SND_CHMAP_POSITION_MASK 0xffff
632
634#define SND_CHMAP_PHASE_INVERSE (0x01 << 16)
636#define SND_CHMAP_DRIVER_SPEC (0x02 << 16)
637
639typedef struct snd_pcm_chmap {
640 unsigned int channels;
641 unsigned int pos[0];
643
645typedef struct snd_pcm_chmap_query {
649
650
653 int subdev,
654 snd_pcm_stream_t stream);
657int snd_pcm_set_chmap(snd_pcm_t *pcm, const snd_pcm_chmap_t *map);
658
659const char *snd_pcm_chmap_type_name(enum snd_pcm_chmap_type val);
660const char *snd_pcm_chmap_name(enum snd_pcm_chmap_position val);
662int snd_pcm_chmap_print(const snd_pcm_chmap_t *map, size_t maxlen, char *buf);
663unsigned int snd_pcm_chmap_from_string(const char *str);
665
666//int snd_pcm_mixer_element(snd_pcm_t *pcm, snd_mixer_t *mixer, snd_mixer_elem_t **elem);
667
668/*
669 * application helpers - these functions are implemented on top
670 * of the basic API
671 */
672
673int snd_pcm_recover(snd_pcm_t *pcm, int err, int silent);
675 snd_pcm_format_t format,
676 snd_pcm_access_t access,
677 unsigned int channels,
678 unsigned int rate,
679 int soft_resample,
680 unsigned int latency);
682 snd_pcm_uframes_t *buffer_size,
683 snd_pcm_uframes_t *period_size);
684
694size_t snd_pcm_info_sizeof(void);
699#define snd_pcm_info_alloca(ptr) __snd_alloca(ptr, snd_pcm_info)
702void snd_pcm_info_copy(snd_pcm_info_t *dst, const snd_pcm_info_t *src);
703unsigned int snd_pcm_info_get_device(const snd_pcm_info_t *obj);
704unsigned int snd_pcm_info_get_subdevice(const snd_pcm_info_t *obj);
707const char *snd_pcm_info_get_id(const snd_pcm_info_t *obj);
708const char *snd_pcm_info_get_name(const snd_pcm_info_t *obj);
709const char *snd_pcm_info_get_subdevice_name(const snd_pcm_info_t *obj);
715void snd_pcm_info_set_device(snd_pcm_info_t *obj, unsigned int val);
716void snd_pcm_info_set_subdevice(snd_pcm_info_t *obj, unsigned int val);
718
729
743int snd_pcm_hw_params_supports_audio_wallclock_ts(const snd_pcm_hw_params_t *params); /* deprecated, use audio_ts_type */
746 unsigned int *rate_num,
747 unsigned int *rate_den);
750
751#if 0
752typedef struct _snd_pcm_hw_strategy snd_pcm_hw_strategy_t;
753
754/* choices need to be sorted on ascending badness */
755typedef struct _snd_pcm_hw_strategy_simple_choices_list {
756 unsigned int value;
757 unsigned int badness;
758} snd_pcm_hw_strategy_simple_choices_list_t;
759
760int snd_pcm_hw_params_strategy(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,
761 const snd_pcm_hw_strategy_t *strategy,
762 unsigned int badness_min,
763 unsigned int badness_max);
764
765void snd_pcm_hw_strategy_free(snd_pcm_hw_strategy_t *strategy);
766int snd_pcm_hw_strategy_simple(snd_pcm_hw_strategy_t **strategyp,
767 unsigned int badness_min,
768 unsigned int badness_max);
769int snd_pcm_hw_params_try_explain_failure(snd_pcm_t *pcm,
771 snd_pcm_hw_params_t *success,
772 unsigned int depth,
773 snd_output_t *out);
774
775#endif
776
777size_t snd_pcm_hw_params_sizeof(void);
782#define snd_pcm_hw_params_alloca(ptr) __snd_alloca(ptr, snd_pcm_hw_params)
786
787#if !defined(ALSA_LIBRARY_BUILD) && !defined(ALSA_PCM_OLD_HW_PARAMS_API)
788
796
804
812
813int snd_pcm_hw_params_get_channels(const snd_pcm_hw_params_t *params, unsigned int *val);
814int snd_pcm_hw_params_get_channels_min(const snd_pcm_hw_params_t *params, unsigned int *val);
815int snd_pcm_hw_params_get_channels_max(const snd_pcm_hw_params_t *params, unsigned int *val);
816int snd_pcm_hw_params_test_channels(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val);
817int snd_pcm_hw_params_set_channels(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val);
818int snd_pcm_hw_params_set_channels_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
819int snd_pcm_hw_params_set_channels_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
820int snd_pcm_hw_params_set_channels_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, unsigned int *max);
821int snd_pcm_hw_params_set_channels_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
822int snd_pcm_hw_params_set_channels_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
823int snd_pcm_hw_params_set_channels_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
824
825int snd_pcm_hw_params_get_rate(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
826int snd_pcm_hw_params_get_rate_min(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
827int snd_pcm_hw_params_get_rate_max(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
828int snd_pcm_hw_params_test_rate(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
829int snd_pcm_hw_params_set_rate(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
830int snd_pcm_hw_params_set_rate_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
831int snd_pcm_hw_params_set_rate_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
832int 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);
833int snd_pcm_hw_params_set_rate_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
834int snd_pcm_hw_params_set_rate_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
835int snd_pcm_hw_params_set_rate_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
836int snd_pcm_hw_params_set_rate_resample(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val);
837int snd_pcm_hw_params_get_rate_resample(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
838int snd_pcm_hw_params_set_export_buffer(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val);
839int snd_pcm_hw_params_get_export_buffer(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
840int snd_pcm_hw_params_set_period_wakeup(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val);
841int snd_pcm_hw_params_get_period_wakeup(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
842int snd_pcm_hw_params_set_drain_silence(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val);
843int snd_pcm_hw_params_get_drain_silence(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
844
845int snd_pcm_hw_params_get_period_time(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
846int snd_pcm_hw_params_get_period_time_min(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
847int snd_pcm_hw_params_get_period_time_max(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
848int snd_pcm_hw_params_test_period_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
849int snd_pcm_hw_params_set_period_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
850int snd_pcm_hw_params_set_period_time_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
851int snd_pcm_hw_params_set_period_time_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
852int 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);
853int snd_pcm_hw_params_set_period_time_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
854int snd_pcm_hw_params_set_period_time_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
855int snd_pcm_hw_params_set_period_time_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
856
869
870int snd_pcm_hw_params_get_periods(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
871int snd_pcm_hw_params_get_periods_min(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
872int snd_pcm_hw_params_get_periods_max(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
873int snd_pcm_hw_params_test_periods(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
874int snd_pcm_hw_params_set_periods(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
875int snd_pcm_hw_params_set_periods_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
876int snd_pcm_hw_params_set_periods_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
877int 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);
878int snd_pcm_hw_params_set_periods_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
879int snd_pcm_hw_params_set_periods_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
880int snd_pcm_hw_params_set_periods_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
882
883int snd_pcm_hw_params_get_buffer_time(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
884int snd_pcm_hw_params_get_buffer_time_min(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
885int snd_pcm_hw_params_get_buffer_time_max(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
886int snd_pcm_hw_params_test_buffer_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
887int snd_pcm_hw_params_set_buffer_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
888int snd_pcm_hw_params_set_buffer_time_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
889int snd_pcm_hw_params_set_buffer_time_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
890int 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);
891int snd_pcm_hw_params_set_buffer_time_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
892int snd_pcm_hw_params_set_buffer_time_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
893int snd_pcm_hw_params_set_buffer_time_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
894
906
907#endif /* !ALSA_LIBRARY_BUILD && !ALSA_PCM_OLD_HW_PARAMS_API */
908
910
920size_t snd_pcm_sw_params_sizeof(void);
925#define snd_pcm_sw_params_alloca(ptr) __snd_alloca(ptr, snd_pcm_sw_params)
930
931#if !defined(ALSA_LIBRARY_BUILD) && !defined(ALSA_PCM_OLD_SW_PARAMS_API)
932
949
950#endif /* !ALSA_LIBRARY_BUILD && !ALSA_PCM_OLD_SW_PARAMS_API */
951
954/* include old API */
955#ifndef ALSA_LIBRARY_BUILD
956#if defined(ALSA_PCM_OLD_HW_PARAMS_API) || defined(ALSA_PCM_OLD_SW_PARAMS_API)
957#include "pcm_old.h"
958#endif
959#endif
960
968size_t snd_pcm_access_mask_sizeof(void);
973#define snd_pcm_access_mask_alloca(ptr) __snd_alloca(ptr, snd_pcm_access_mask)
983
993size_t snd_pcm_format_mask_sizeof(void);
998#define snd_pcm_format_mask_alloca(ptr) __snd_alloca(ptr, snd_pcm_format_mask)
1008
1023#define snd_pcm_subformat_mask_alloca(ptr) __snd_alloca(ptr, snd_pcm_subformat_mask)
1033
1043size_t snd_pcm_status_sizeof(void);
1048#define snd_pcm_status_alloca(ptr) __snd_alloca(ptr, snd_pcm_status)
1060 snd_pcm_audio_tstamp_report_t *audio_tstamp_report);
1062 snd_pcm_audio_tstamp_config_t *audio_tstamp_config);
1063
1064static inline void snd_pcm_pack_audio_tstamp_config(unsigned int *data,
1066{
1067 *data = config->report_delay;
1068 *data <<= 4;
1069 *data |= config->type_requested;
1070}
1071
1072static inline void snd_pcm_unpack_audio_tstamp_report(unsigned int data, unsigned int accuracy,
1074{
1075 data >>= 16;
1076 report->valid = data & 1;
1077 report->actual_type = (data >> 1) & 0xF;
1078 report->accuracy_report = (data >> 5) & 1;
1079 report->accuracy = accuracy;
1080}
1081
1086
1096const char *snd_pcm_type_name(snd_pcm_type_t type);
1097const char *snd_pcm_stream_name(const snd_pcm_stream_t stream);
1098const char *snd_pcm_access_name(const snd_pcm_access_t _access);
1099const char *snd_pcm_format_name(const snd_pcm_format_t format);
1100const char *snd_pcm_format_description(const snd_pcm_format_t format);
1101const char *snd_pcm_subformat_name(const snd_pcm_subformat_t subformat);
1102const char *snd_pcm_subformat_description(const snd_pcm_subformat_t subformat);
1104snd_pcm_format_t snd_pcm_format_value(const char* name);
1105const char *snd_pcm_tstamp_mode_name(const snd_pcm_tstamp_t mode);
1106const char *snd_pcm_state_name(const snd_pcm_state_t state);
1107
1117int snd_pcm_dump(snd_pcm_t *pcm, snd_output_t *out);
1124
1135 const snd_pcm_channel_area_t **areas,
1136 snd_pcm_uframes_t *offset,
1137 snd_pcm_uframes_t *frames);
1139 snd_pcm_uframes_t offset,
1140 snd_pcm_uframes_t frames);
1145
1162int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
1163int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
1164snd_pcm_format_t snd_pcm_build_linear_format(int width, int pwidth, int unsignd, int big_endian);
1165ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
1170int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int samples);
1171
1174long snd_pcm_bytes_to_samples(snd_pcm_t *pcm, ssize_t bytes);
1175ssize_t snd_pcm_samples_to_bytes(snd_pcm_t *pcm, long samples);
1176
1177int snd_pcm_area_silence(const snd_pcm_channel_area_t *dst_channel, snd_pcm_uframes_t dst_offset,
1178 unsigned int samples, snd_pcm_format_t format);
1179int snd_pcm_areas_silence(const snd_pcm_channel_area_t *dst_channels, snd_pcm_uframes_t dst_offset,
1180 unsigned int channels, snd_pcm_uframes_t frames, snd_pcm_format_t format);
1181int snd_pcm_area_copy(const snd_pcm_channel_area_t *dst_channel, snd_pcm_uframes_t dst_offset,
1182 const snd_pcm_channel_area_t *src_channel, snd_pcm_uframes_t src_offset,
1183 unsigned int samples, snd_pcm_format_t format);
1184int snd_pcm_areas_copy(const snd_pcm_channel_area_t *dst_channels, snd_pcm_uframes_t dst_offset,
1185 const snd_pcm_channel_area_t *src_channels, snd_pcm_uframes_t src_offset,
1186 unsigned int channels, snd_pcm_uframes_t frames, snd_pcm_format_t format);
1187int snd_pcm_areas_copy_wrap(const snd_pcm_channel_area_t *dst_channels,
1188 snd_pcm_uframes_t dst_offset,
1189 const snd_pcm_uframes_t dst_size,
1190 const snd_pcm_channel_area_t *src_channels,
1191 snd_pcm_uframes_t src_offset,
1192 const snd_pcm_uframes_t src_size,
1193 const unsigned int channels,
1194 snd_pcm_uframes_t frames,
1195 const snd_pcm_format_t format);
1196
1204static inline void *snd_pcm_channel_area_addr(const snd_pcm_channel_area_t *area, snd_pcm_uframes_t offset)
1205{
1206 return (char *)area->addr + (area->first + area->step * offset) / 8;
1207}
1208
1215static inline unsigned int snd_pcm_channel_area_step(const snd_pcm_channel_area_t *area)
1216{
1217 return area->step / 8;
1218}
1219
1230typedef enum _snd_pcm_hook_type {
1231 SND_PCM_HOOK_TYPE_HW_PARAMS = 0,
1232 SND_PCM_HOOK_TYPE_HW_FREE,
1233 SND_PCM_HOOK_TYPE_CLOSE,
1234 SND_PCM_HOOK_TYPE_LAST = SND_PCM_HOOK_TYPE_CLOSE
1236
1238typedef struct _snd_pcm_hook snd_pcm_hook_t;
1243void snd_pcm_hook_set_private(snd_pcm_hook_t *hook, void *private_data);
1244int snd_pcm_hook_add(snd_pcm_hook_t **hookp, snd_pcm_t *pcm,
1246 snd_pcm_hook_func_t func, void *private_data);
1248
1259typedef struct _snd_pcm_scope_ops {
1263 int (*enable)(snd_pcm_scope_t *scope);
1267 void (*disable)(snd_pcm_scope_t *scope);
1271 void (*start)(snd_pcm_scope_t *scope);
1275 void (*stop)(snd_pcm_scope_t *scope);
1279 void (*update)(snd_pcm_scope_t *scope);
1283 void (*reset)(snd_pcm_scope_t *scope);
1287 void (*close)(snd_pcm_scope_t *scope);
1289
1291unsigned int snd_pcm_meter_get_channels(snd_pcm_t *pcm);
1292unsigned int snd_pcm_meter_get_rate(snd_pcm_t *pcm);
1299 const snd_pcm_scope_ops_t *val);
1300void snd_pcm_scope_set_name(snd_pcm_scope_t *scope, const char *val);
1301const char *snd_pcm_scope_get_name(snd_pcm_scope_t *scope);
1304int snd_pcm_scope_s16_open(snd_pcm_t *pcm, const char *name,
1305 snd_pcm_scope_t **scopep);
1307 unsigned int channel);
1308
1330
1332typedef enum _snd_spcm_xrun_type {
1338
1346
1347int snd_spcm_init(snd_pcm_t *pcm,
1348 unsigned int rate,
1349 unsigned int channels,
1350 snd_pcm_format_t format,
1351 snd_pcm_subformat_t subformat,
1352 snd_spcm_latency_t latency,
1353 snd_pcm_access_t _access,
1354 snd_spcm_xrun_type_t xrun_type);
1355
1356int snd_spcm_init_duplex(snd_pcm_t *playback_pcm,
1357 snd_pcm_t *capture_pcm,
1358 unsigned int rate,
1359 unsigned int channels,
1360 snd_pcm_format_t format,
1361 snd_pcm_subformat_t subformat,
1362 snd_spcm_latency_t latency,
1363 snd_pcm_access_t _access,
1364 snd_spcm_xrun_type_t xrun_type,
1365 snd_spcm_duplex_type_t duplex_type);
1366
1368 unsigned int *rate,
1369 snd_pcm_uframes_t *buffer_size,
1370 snd_pcm_uframes_t *period_size);
1371
1381/* Deprecated functions, for compatibility */
1382const char *snd_pcm_start_mode_name(snd_pcm_start_t mode) __attribute__((deprecated));
1383const char *snd_pcm_xrun_mode_name(snd_pcm_xrun_t mode) __attribute__((deprecated));
1384int snd_pcm_sw_params_set_start_mode(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_start_t val) __attribute__((deprecated));
1385snd_pcm_start_t snd_pcm_sw_params_get_start_mode(const snd_pcm_sw_params_t *params) __attribute__((deprecated));
1386int snd_pcm_sw_params_set_xrun_mode(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_xrun_t val) __attribute__((deprecated));
1387snd_pcm_xrun_t snd_pcm_sw_params_get_xrun_mode(const snd_pcm_sw_params_t *params) __attribute__((deprecated));
1388#if !defined(ALSA_LIBRARY_BUILD) && !defined(ALSA_PCM_OLD_SW_PARAMS_API)
1389int snd_pcm_sw_params_set_xfer_align(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val) __attribute__((deprecated));
1390int snd_pcm_sw_params_get_xfer_align(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val) __attribute__((deprecated));
1391int snd_pcm_sw_params_set_sleep_min(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, unsigned int val) __attribute__((deprecated));
1392int snd_pcm_sw_params_get_sleep_min(const snd_pcm_sw_params_t *params, unsigned int *val) __attribute__((deprecated));
1393#endif /* !ALSA_LIBRARY_BUILD && !ALSA_PCM_OLD_SW_PARAMS_API */
1394#if !defined(ALSA_LIBRARY_BUILD) && !defined(ALSA_PCM_OLD_HW_PARAMS_API)
1395int snd_pcm_hw_params_get_tick_time(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated));
1396int snd_pcm_hw_params_get_tick_time_min(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated));
1397int snd_pcm_hw_params_get_tick_time_max(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated));
1398int snd_pcm_hw_params_test_tick_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir) __attribute__((deprecated));
1399int snd_pcm_hw_params_set_tick_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir) __attribute__((deprecated));
1400int 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));
1401int 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));
1402int 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));
1403int 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));
1404int 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));
1405int 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));
1406#endif /* !ALSA_LIBRARY_BUILD && !ALSA_PCM_OLD_HW_PARAMS_API */
1407
1410#ifdef __cplusplus
1411}
1412#endif
1413
1414#endif /* __ALSA_PCM_H */
struct _snd_config snd_config_t
Internal structure for a configuration node object.
Definition conf.h:69
struct timespec snd_htimestamp_t
Definition global.h:154
struct _snd_async_handler snd_async_handler_t
Internal structure for an async notification client handler.
Definition global.h:115
struct timeval snd_timestamp_t
Definition global.h:152
void(* snd_async_callback_t)(snd_async_handler_t *handler)
Async notification callback.
Definition global.h:122
struct _snd_output snd_output_t
Internal structure for an output object.
Definition output.h:56
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:4037
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:4057
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:4026
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:3997
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:4016
size_t snd_pcm_access_mask_sizeof(void)
get size of snd_pcm_access_mask_t
Definition pcm.c:3964
void snd_pcm_access_mask_free(snd_pcm_access_mask_t *obj)
frees a previously allocated snd_pcm_access_mask_t
Definition pcm.c:3987
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:4007
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:4047
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:3974
int snd_pcm_sw_params_get_sleep_min(const snd_pcm_sw_params_t *params, unsigned int *val)
(DEPRECATED) Get minimum numbers of ticks to sleep from a software configuration container
Definition pcm.c:6631
int snd_pcm_hw_params_set_tick_time_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
(DEPRECATED) Restrict a configuration space with a maximum tick time
Definition pcm.c:6220
int snd_pcm_hw_params_set_tick_time_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
(DEPRECATED) Restrict a configuration space to have tick time nearest to a target
Definition pcm.c:6255
const char * snd_pcm_xrun_mode_name(snd_pcm_xrun_t mode)
(DEPRECATED) get name of PCM xrun mode setting
Definition pcm.c:2267
snd_pcm_xrun_t snd_pcm_sw_params_get_xrun_mode(const snd_pcm_sw_params_t *params)
(DEPRECATED) Get xrun mode from a software configuration container
Definition pcm.c:6525
int snd_pcm_sw_params_set_start_mode(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_start_t val)
(DEPRECATED) Set start mode inside a software configuration container
Definition pcm.c:6451
snd_pcm_start_t snd_pcm_sw_params_get_start_mode(const snd_pcm_sw_params_t *params)
(DEPRECATED) Get start mode from a software configuration container
Definition pcm.c:6477
int snd_pcm_hw_params_get_tick_time(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
(DEPRECATED) Extract tick time from a configuration space
Definition pcm.c:6120
int snd_pcm_hw_params_set_tick_time_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
(DEPRECATED) Restrict a configuration space to contain only its maximum tick time
Definition pcm.c:6293
int snd_pcm_sw_params_set_xrun_mode(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_xrun_t val)
(DEPRECATED) Set xrun mode inside a software configuration container
Definition pcm.c:6498
const char * snd_pcm_start_mode_name(snd_pcm_start_t mode)
(DEPRECATED) get name of PCM start mode setting
Definition pcm.c:2251
int snd_pcm_hw_params_get_tick_time_min(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
(DEPRECATED) Extract minimum tick time from a configuration space
Definition pcm.c:6139
int snd_pcm_hw_params_set_tick_time_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
(DEPRECATED) Restrict a configuration space with a minimum tick time
Definition pcm.c:6205
int snd_pcm_hw_params_set_tick_time_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
(DEPRECATED) Restrict a configuration space to contain only its minimum tick time
Definition pcm.c:6274
int snd_pcm_hw_params_get_tick_time_max(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
(DEPRECATED) Extract maximum tick time from a configuration space
Definition pcm.c:6158
int snd_pcm_sw_params_set_xfer_align(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val)
(DEPRECATED) Set xfer align inside a software configuration container
Definition pcm.c:6728
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)
(DEPRECATED) Restrict a configuration space to have tick times in a given range
Definition pcm.c:6237
int snd_pcm_hw_params_set_tick_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)
(DEPRECATED) Restrict a configuration space to contain only one tick time
Definition pcm.c:6190
int snd_pcm_sw_params_set_sleep_min(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, unsigned int val)
(DEPRECATED) Set minimum number of ticks to sleep inside a software configuration container
Definition pcm.c:6616
int snd_pcm_hw_params_test_tick_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)
(DEPRECATED) Verify if a tick time is available inside a configuration space for a PCM
Definition pcm.c:6175
int snd_pcm_sw_params_get_xfer_align(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val)
(DEPRECATED) Get xfer align from a software configuration container
Definition pcm.c:6743
const char * snd_pcm_access_name(const snd_pcm_access_t _access)
get name of PCM access type
Definition pcm.c:2140
const char * snd_pcm_format_name(const snd_pcm_format_t format)
get name of PCM sample format
Definition pcm.c:2152
const char * snd_pcm_format_description(const snd_pcm_format_t format)
get description of PCM sample format
Definition pcm.c:2164
snd_pcm_format_t snd_pcm_format_value(const char *name)
get PCM sample format from name
Definition pcm.c:2176
snd_pcm_subformat_t snd_pcm_subformat_value(const char *name)
get PCM sample subformat from name
Definition pcm.c:2227
const char * snd_pcm_type_name(snd_pcm_type_t type)
get name of PCM type
Definition pcm.c:2322
const char * snd_pcm_state_name(const snd_pcm_state_t state)
get name of PCM state
Definition pcm.c:2307
const char * snd_pcm_tstamp_mode_name(const snd_pcm_tstamp_t mode)
get name of PCM tstamp mode setting
Definition pcm.c:2283
const char * snd_pcm_stream_name(const snd_pcm_stream_t stream)
get name of PCM stream type
Definition pcm.c:2128
const char * snd_pcm_subformat_name(const snd_pcm_subformat_t subformat)
get name of PCM sample subformat
Definition pcm.c:2203
const char * snd_pcm_subformat_description(const snd_pcm_subformat_t subformat)
get description of PCM sample subformat
Definition pcm.c:2215
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:175
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:200
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:225
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:150
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:7390
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:7503
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:3557
int snd_pcm_dump_setup(snd_pcm_t *pcm, snd_output_t *out)
Dump current setup (hardware and software) for PCM.
Definition pcm.c:2394
int snd_pcm_dump_hw_setup(snd_pcm_t *pcm, snd_output_t *out)
Dump current hardware setup for PCM.
Definition pcm.c:2337
int snd_pcm_dump_sw_setup(snd_pcm_t *pcm, snd_output_t *out)
Dump current software setup for PCM.
Definition pcm.c:2367
int snd_pcm_dump(snd_pcm_t *pcm, snd_output_t *out)
Dump PCM info.
Definition pcm.c:2428
int snd_pcm_sw_params_dump(snd_pcm_sw_params_t *params, snd_output_t *out)
Dump a software configuration.
Definition pcm.c:6374
int snd_pcm_status_dump(snd_pcm_status_t *status, snd_output_t *out)
Dump status.
Definition pcm.c:2407
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:4149
void snd_pcm_format_mask_free(snd_pcm_format_mask_t *obj)
frees a previously allocated snd_pcm_format_mask_t
Definition pcm.c:4089
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:4109
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:4118
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:4099
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:4159
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:4139
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:4076
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:4128
size_t snd_pcm_format_mask_sizeof(void)
get size of snd_pcm_format_mask_t
Definition pcm.c:4066
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:4882
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:4541
size_t snd_pcm_hw_params_sizeof(void)
get size of snd_pcm_hw_params_t
Definition pcm.c:4272
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:5585
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:4556
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:3931
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:5703
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:5515
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:4677
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:4381
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:5551
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:5938
int snd_pcm_hw_params_get_drain_silence(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)
Extract drain with the filling of silence samples from a configuration space.
Definition pcm.c:5089
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:4404
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:4702
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:6305
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:4835
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:5815
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:6057
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:4983
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:5277
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:5191
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:5665
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:4365
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:4491
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:5430
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:3617
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:4900
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:4665
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:5865
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:3597
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:5959
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:5978
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:4585
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:5318
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:5052
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:4768
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:4501
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:5600
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:5260
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:4478
int snd_pcm_hw_params_set_drain_silence(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val)
Restrict a configuration space to fill the end of playback stream with silence when drain() is invoke...
Definition pcm.c:5071
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:4350
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:3577
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:4749
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:3890
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:5390
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:4717
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:4938
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:4820
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:4447
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:5569
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:5630
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:4435
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:4422
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:4804
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:5769
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:5884
int snd_pcm_hw_params_can_resume(const snd_pcm_hw_params_t *params)
Check if hardware supports resume.
Definition pcm.c:3717
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:3954
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:4282
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:5108
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:5533
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:4689
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:5144
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:4321
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:4462
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:4516
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:3657
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:5992
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:4951
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:5847
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:4865
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:5375
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:4850
int snd_pcm_hw_params_is_perfect_drain(const snd_pcm_hw_params_t *params)
Check if hardware is capable of perfect drain.
Definition pcm.c:3816
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:3912
void snd_pcm_hw_params_free(snd_pcm_hw_params_t *obj)
frees a previously allocated snd_pcm_hw_params_t
Definition pcm.c:4295
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:4653
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:5409
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:5453
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:4625
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:5223
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:5785
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:4305
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:5751
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:3854
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:5241
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:5615
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:5175
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:5684
int snd_pcm_hw_params_can_pause(const snd_pcm_hw_params_t *params)
Check if hardware supports pause.
Definition pcm.c:3697
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:5206
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:4595
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:4572
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:4338
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:5340
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:5919
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:5715
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:5830
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:5296
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:3737
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:5360
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:5733
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:4919
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:5030
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:6020
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:3637
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:4640
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:6077
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:4969
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:5800
int snd_pcm_hw_params_can_overrange(const snd_pcm_hw_params_t *params)
Check if hardware supports overrange detection.
Definition pcm.c:3677
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:6004
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:5499
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:3793
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:4394
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:6097
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:4733
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:4610
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:5126
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:3757
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:6037
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:5903
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:5160
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:4529
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:5647
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:5476
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:4786
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:3777
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:3836
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:5001
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:3258
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_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:3143
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_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:3508
int snd_pcm_format_big_endian(snd_pcm_format_t format)
Return endian info for a PCM sample format.
Definition pcm_misc.c:181
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_format_linear(snd_pcm_format_t format)
Return linear info for a PCM sample format.
Definition pcm_misc.c:100
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
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
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_format_little_endian(snd_pcm_format_t format)
Return endian info for a PCM sample format.
Definition pcm_misc.c:128
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_format_unsigned(snd_pcm_format_t format)
Return sign info for a PCM sample linear format.
Definition pcm_misc.c:85
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_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:3309
int snd_pcm_format_physical_width(snd_pcm_format_t format)
Return bits needed to store a PCM sample.
Definition pcm_misc.c:277
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
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:2463
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:3430
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
ssize_t snd_pcm_samples_to_bytes(snd_pcm_t *pcm, long samples)
Convert samples in bytes for a PCM.
Definition pcm.c:2495
long snd_pcm_bytes_to_samples(snd_pcm_t *pcm, ssize_t bytes)
Convert bytes in samples for a PCM.
Definition pcm.c:2479
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:2447
int snd_pcm_format_cpu_endian(snd_pcm_format_t format)
Return endian info for a PCM sample format.
Definition pcm_misc.c:196
int(* snd_pcm_hook_func_t)(snd_pcm_hook_t *hook)
Definition pcm.h:1240
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
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_hook_remove(snd_pcm_hook_t *hook)
Remove a PCM hook.
Definition pcm_hooks.c:628
snd_pcm_hook_type_t
Definition pcm.h:1230
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_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
struct _snd_pcm_hook snd_pcm_hook_t
Definition pcm.h:1238
unsigned int snd_pcm_info_get_device(const snd_pcm_info_t *obj)
Get device from a PCM info container.
Definition pcm.c:7208
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:7197
int snd_pcm_info_malloc(snd_pcm_info_t **ptr)
allocate an invalid snd_pcm_info_t using standard malloc
Definition pcm.c:7174
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:7353
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:7274
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:7296
int snd_pcm_info_get_card(const snd_pcm_info_t *obj)
Get card from a PCM info container.
Definition pcm.c:7241
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:7329
const char * snd_pcm_info_get_name(const snd_pcm_info_t *obj)
Get name from a PCM info container.
Definition pcm.c:7263
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:7364
size_t snd_pcm_info_sizeof(void)
get size of snd_pcm_info_t
Definition pcm.c:7164
const char * snd_pcm_info_get_id(const snd_pcm_info_t *obj)
Get id from a PCM info container.
Definition pcm.c:7252
void snd_pcm_info_free(snd_pcm_info_t *obj)
frees a previously allocated snd_pcm_info_t
Definition pcm.c:7187
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:7342
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:7230
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:7318
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:7285
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:7307
unsigned int snd_pcm_info_get_subdevice(const snd_pcm_info_t *obj)
Get subdevice from a PCM info container.
Definition pcm.c:7219
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:6711
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:6599
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:6763
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:6783
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:6402
void snd_pcm_sw_params_free(snd_pcm_sw_params_t *obj)
frees a previously allocated snd_pcm_sw_params_t
Definition pcm.c:6415
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:6567
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:6681
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:6852
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:6936
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:6807
size_t snd_pcm_sw_params_sizeof(void)
get size of snd_pcm_sw_params_t
Definition pcm.c:6392
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:6655
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:6878
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:6829
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:6437
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:6582
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:6546
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:6910
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:6698
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:6425
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:963
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:983
int snd_pcm_scope_malloc(snd_pcm_scope_t **ptr)
allocate an invalid snd_pcm_scope_t using standard malloc
Definition pcm_meter.c:1232
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:883
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:1181
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:939
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:993
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:911
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:863
snd_pcm_uframes_t snd_pcm_meter_get_now(snd_pcm_t *pcm)
Get meter "now" frame pointer from a SND_PCM_TYPE_METER PCM.
Definition pcm_meter.c:925
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:953
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:973
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:1213
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:848
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:897
snd_spcm_latency_t
Definition pcm.h:1319
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
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
snd_spcm_duplex_type_t
Definition pcm.h:1340
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
snd_spcm_xrun_type_t
Definition pcm.h:1332
@ SND_SPCM_LATENCY_STANDARD
Definition pcm.h:1322
@ SND_SPCM_LATENCY_REALTIME
Definition pcm.h:1328
@ SND_SPCM_LATENCY_MEDIUM
Definition pcm.h:1325
@ SND_SPCM_DUPLEX_LIBERAL
Definition pcm.h:1342
@ SND_SPCM_DUPLEX_PEDANTIC
Definition pcm.h:1344
@ SND_SPCM_XRUN_STOP
Definition pcm.h:1336
@ SND_SPCM_XRUN_IGNORE
Definition pcm.h:1334
void snd_pcm_status_get_audio_htstamp(const snd_pcm_status_t *obj, snd_htimestamp_t *ptr)
Get "now" hi-res audio timestamp from a PCM status container.
Definition pcm.c:7068
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:7122
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:6982
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:7154
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:7008
size_t snd_pcm_status_sizeof(void)
get size of snd_pcm_status_t
Definition pcm.c:6949
void snd_pcm_status_get_driver_htstamp(const snd_pcm_status_t *obj, snd_htimestamp_t *ptr)
Get "now" hi-res driver timestamp from a PCM status container. Defines when the status was generated ...
Definition pcm.c:7080
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:7091
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:7132
int snd_pcm_status_malloc(snd_pcm_status_t **ptr)
allocate an invalid snd_pcm_status_t using standard malloc
Definition pcm.c:6959
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:7027
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:6993
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:7144
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:7105
void snd_pcm_status_get_tstamp(const snd_pcm_status_t *obj, snd_timestamp_t *ptr)
Get "now" timestamp from a PCM status container.
Definition pcm.c:7040
void snd_pcm_status_free(snd_pcm_status_t *obj)
frees a previously allocated snd_pcm_status_t
Definition pcm.c:6972
void snd_pcm_status_get_htstamp(const snd_pcm_status_t *obj, snd_htimestamp_t *ptr)
Get "now" hi-res timestamp from a PCM status container.
Definition pcm.c:7055
void snd_pcm_subformat_mask_free(snd_pcm_subformat_mask_t *obj)
frees a previously allocated snd_pcm_subformat_mask_t
Definition pcm.c:4192
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:4231
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:4212
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:4179
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:4242
size_t snd_pcm_subformat_mask_sizeof(void)
get size of snd_pcm_subformat_mask_t
Definition pcm.c:4169
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:4252
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:4221
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:4262
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:4202
int snd_pcm_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp)
Obtain delay for a running PCM handle.
Definition pcm.c:1151
int snd_pcm_close(snd_pcm_t *pcm)
close PCM handle
Definition pcm.c:775
_snd_pcm_type
Definition pcm.h:421
snd_pcm_chmap_position
Definition pcm.h:589
struct _snd_pcm_format_mask snd_pcm_format_mask_t
Definition pcm.h:73
void snd_pcm_free_chmaps(snd_pcm_chmap_query_t **maps)
Definition pcm.c:8284
int snd_pcm_unlink(snd_pcm_t *pcm)
Remove a PCM from a linked group.
Definition pcm.c:1731
snd_pcm_sframes_t snd_pcm_rewindable(snd_pcm_t *pcm)
Get safe count of frames which can be rewinded.
Definition pcm.c:1423
snd_pcm_start_t
Definition pcm.h:324
int snd_pcm_resume(snd_pcm_t *pcm)
Resume from suspend, no samples are lost.
Definition pcm.c:1180
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:3104
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:2791
const char * snd_pcm_chmap_name(enum snd_pcm_chmap_position val)
Definition pcm.c:8378
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:950
int snd_pcm_chmap_print(const snd_pcm_chmap_t *map, size_t maxlen, char *buf)
Definition pcm.c:8446
snd_pcm_subformat_t
Definition pcm.h:284
int snd_pcm_recover(snd_pcm_t *pcm, int err, int silent)
Recover the stream state from an error or suspend.
Definition pcm.c:8727
int snd_pcm_hw_free(snd_pcm_t *pcm)
Remove PCM hardware configuration and free associated resources.
Definition pcm.c:967
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:8964
snd_pcm_audio_tstamp_type_t
Definition pcm.h:363
int snd_pcm_status(snd_pcm_t *pcm, snd_pcm_status_t *status)
Obtain status (runtime) information for PCM handle.
Definition pcm.c:1053
int snd_pcm_reset(snd_pcm_t *pcm)
Reset PCM position.
Definition pcm.c:1264
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:1209
int snd_pcm_hwsync(snd_pcm_t *pcm)
(DEPRECATED) Synchronize stream position with hardware
Definition pcm.c:1106
struct _snd_pcm_scope snd_pcm_scope_t
Definition pcm.h:519
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:8775
int snd_pcm_drain(snd_pcm_t *pcm)
Stop a PCM preserving pending frames.
Definition pcm.c:1357
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:1646
snd_pcm_t * snd_async_handler_get_pcm(snd_async_handler_t *handler)
Return PCM handle related to an async handler.
Definition pcm.c:2545
const char * snd_pcm_chmap_type_name(enum snd_pcm_chmap_type val)
Definition pcm.c:8345
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:3073
snd_pcm_chmap_t * snd_pcm_chmap_parse_string(const char *str)
Definition pcm.c:8536
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:2515
int snd_pcm_set_chmap(snd_pcm_t *pcm, const snd_pcm_chmap_t *map)
Definition pcm.c:8314
snd_pcm_state_t
Definition pcm.h:299
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:6355
snd_pcm_chmap_query_t ** snd_pcm_query_chmaps(snd_pcm_t *pcm)
Definition pcm.c:8273
struct _snd_pcm_hw_params snd_pcm_hw_params_t
Definition pcm.h:64
snd_pcm_access_t
Definition pcm.h:110
snd_pcm_xrun_t
Definition pcm.h:333
const char * snd_pcm_name(snd_pcm_t *pcm)
get identifier of PCM handle
Definition pcm.c:735
snd_pcm_tstamp_t
Definition pcm.h:342
snd_pcm_subclass_t
Definition pcm.h:92
int snd_pcm_start(snd_pcm_t *pcm)
Start a PCM.
Definition pcm.c:1289
snd_pcm_sframes_t snd_pcm_rewind(snd_pcm_t *pcm, snd_pcm_uframes_t frames)
Move application frame position backward.
Definition pcm.c:1454
snd_pcm_tstamp_type_t
Definition pcm.h:355
int snd_pcm_drop(snd_pcm_t *pcm)
Stop a PCM dropping pending frames.
Definition pcm.c:1320
long snd_pcm_sframes_t
Definition pcm.h:398
int snd_pcm_poll_descriptors(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int space)
get poll descriptors
Definition pcm.c:1822
int snd_pcm_prepare(snd_pcm_t *pcm)
Prepare PCM for use.
Definition pcm.c:1234
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:1270
struct _snd_pcm_info snd_pcm_info_t
Definition pcm.h:48
struct _snd_pcm_sw_params snd_pcm_sw_params_t
Definition pcm.h:67
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:1864
struct _snd_pcm_access_mask snd_pcm_access_mask_t
Definition pcm.h:71
int snd_pcm_open(snd_pcm_t **pcm, const char *name, snd_pcm_stream_t stream, int mode)
Opens a PCM.
Definition pcm.c:2743
snd_pcm_state_t snd_pcm_state(snd_pcm_t *pcm)
Return PCM state.
Definition pcm.c:1082
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:2773
struct _snd_pcm_subformat_mask snd_pcm_subformat_mask_t
Definition pcm.h:75
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:1000
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:3049
int snd_pcm_nonblock(snd_pcm_t *pcm, int nonblock)
set nonblock mode
Definition pcm.c:811
snd_pcm_stream_t snd_pcm_stream(snd_pcm_t *pcm)
get stream for a PCM handle
Definition pcm.c:761
struct _snd_pcm_status snd_pcm_status_t
Definition pcm.h:69
struct _snd_pcm snd_pcm_t
Definition pcm.h:418
snd_pcm_format_t
Definition pcm.h:125
snd_pcm_sframes_t snd_pcm_forwardable(snd_pcm_t *pcm)
Get safe count of frames which can be forwarded.
Definition pcm.c:1489
snd_pcm_type_t snd_pcm_type(snd_pcm_t *pcm)
get type of PCM handle
Definition pcm.c:748
const char * snd_pcm_chmap_long_name(enum snd_pcm_chmap_position val)
Definition pcm.c:8431
unsigned long snd_pcm_uframes_t
Definition pcm.h:396
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:1568
snd_pcm_chmap_t * snd_pcm_get_chmap(snd_pcm_t *pcm)
Definition pcm.c:8301
snd_pcm_stream_t
Definition pcm.h:101
int snd_pcm_link(snd_pcm_t *pcm1, snd_pcm_t *pcm2)
Link two PCMs.
Definition pcm.c:1713
int snd_pcm_poll_descriptors_count(snd_pcm_t *pcm)
get count of poll descriptors for PCM handle
Definition pcm.c:1758
enum _snd_pcm_type snd_pcm_type_t
Definition pcm.h:489
snd_pcm_sframes_t snd_pcm_forward(snd_pcm_t *pcm, snd_pcm_uframes_t frames)
Move application frame position forward.
Definition pcm.c:1523
snd_pcm_class_t
Definition pcm.h:78
unsigned int snd_pcm_chmap_from_string(const char *str)
Definition pcm.c:8524
int snd_pcm_wait(snd_pcm_t *pcm, int timeout)
Wait for a PCM to become ready.
Definition pcm.c:2902
int snd_pcm_pause(snd_pcm_t *pcm, int enable)
Pause/resume PCM.
Definition pcm.c:1391
snd_pcm_chmap_type
Definition pcm.h:580
int snd_pcm_info(snd_pcm_t *pcm, snd_pcm_info_t *info)
Obtain general (static) information for PCM handle.
Definition pcm.c:881
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:1607
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:899
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:1685
@ SND_PCM_TYPE_DSHARE
Definition pcm.h:474
@ SND_PCM_TYPE_HW
Definition pcm.h:423
@ SND_PCM_TYPE_DMIX
Definition pcm.h:468
@ SND_PCM_TYPE_NULL
Definition pcm.h:432
@ SND_PCM_TYPE_MULAW
Definition pcm.h:444
@ SND_PCM_TYPE_ROUTE
Definition pcm.h:450
@ SND_PCM_TYPE_HOOKS
Definition pcm.h:425
@ SND_PCM_TYPE_LINEAR
Definition pcm.h:440
@ SND_PCM_TYPE_INET
Definition pcm.h:436
@ SND_PCM_TYPE_JACK
Definition pcm.h:470
@ SND_PCM_TYPE_METER
Definition pcm.h:456
@ SND_PCM_TYPE_DSNOOP
Definition pcm.h:472
@ SND_PCM_TYPE_MULTI
Definition pcm.h:428
@ SND_PCM_TYPE_FILE
Definition pcm.h:430
@ SND_PCM_TYPE_SHARE
Definition pcm.h:454
@ SND_PCM_TYPE_SHM
Definition pcm.h:434
@ SND_PCM_TYPE_SOFTVOL
Definition pcm.h:478
@ SND_PCM_TYPE_LBSERVER
Definition pcm.h:462
@ SND_PCM_TYPE_EXTPLUG
Definition pcm.h:482
@ SND_PCM_TYPE_ADPCM
Definition pcm.h:446
@ SND_PCM_TYPE_MIX
Definition pcm.h:458
@ SND_PCM_TYPE_MMAP_EMUL
Definition pcm.h:484
@ SND_PCM_TYPE_IEC958
Definition pcm.h:476
@ SND_PCM_TYPE_ALAW
Definition pcm.h:442
@ SND_PCM_TYPE_DROUTE
Definition pcm.h:460
@ SND_PCM_TYPE_RATE
Definition pcm.h:448
@ SND_PCM_TYPE_IOPLUG
Definition pcm.h:480
@ SND_PCM_TYPE_PLUG
Definition pcm.h:452
@ SND_PCM_TYPE_COPY
Definition pcm.h:438
@ SND_PCM_TYPE_LADSPA
Definition pcm.h:466
@ SND_PCM_TYPE_LINEAR_FLOAT
Definition pcm.h:464
@ SND_CHMAP_TSR
Definition pcm.h:621
@ SND_CHMAP_RRC
Definition pcm.h:605
@ SND_CHMAP_TFLC
Definition pcm.h:618
@ SND_CHMAP_FLW
Definition pcm.h:606
@ SND_CHMAP_FLH
Definition pcm.h:608
@ SND_CHMAP_FR
Definition pcm.h:594
@ SND_CHMAP_TFRC
Definition pcm.h:619
@ SND_CHMAP_FC
Definition pcm.h:597
@ SND_CHMAP_RR
Definition pcm.h:596
@ SND_CHMAP_LFE
Definition pcm.h:598
@ SND_CHMAP_TSL
Definition pcm.h:620
@ SND_CHMAP_UNKNOWN
Definition pcm.h:590
@ SND_CHMAP_MONO
Definition pcm.h:592
@ SND_CHMAP_FL
Definition pcm.h:593
@ SND_CHMAP_RLFE
Definition pcm.h:623
@ SND_CHMAP_BLC
Definition pcm.h:625
@ SND_CHMAP_BC
Definition pcm.h:624
@ SND_CHMAP_FRC
Definition pcm.h:603
@ SND_CHMAP_NA
Definition pcm.h:591
@ SND_CHMAP_RLC
Definition pcm.h:604
@ SND_CHMAP_FRW
Definition pcm.h:607
@ SND_CHMAP_FLC
Definition pcm.h:602
@ SND_CHMAP_TFC
Definition pcm.h:614
@ SND_CHMAP_TRR
Definition pcm.h:616
@ SND_CHMAP_TRL
Definition pcm.h:615
@ SND_CHMAP_LLFE
Definition pcm.h:622
@ SND_CHMAP_SR
Definition pcm.h:600
@ SND_CHMAP_TRC
Definition pcm.h:617
@ SND_CHMAP_FCH
Definition pcm.h:609
@ SND_CHMAP_TFR
Definition pcm.h:613
@ SND_CHMAP_TFL
Definition pcm.h:612
@ SND_CHMAP_RC
Definition pcm.h:601
@ SND_CHMAP_SL
Definition pcm.h:599
@ SND_CHMAP_BRC
Definition pcm.h:626
@ SND_CHMAP_FRH
Definition pcm.h:610
@ SND_CHMAP_RL
Definition pcm.h:595
@ SND_CHMAP_TC
Definition pcm.h:611
@ SND_PCM_START_DATA
Definition pcm.h:326
@ SND_PCM_START_EXPLICIT
Definition pcm.h:328
@ SND_PCM_SUBFORMAT_STD
Definition pcm.h:288
@ SND_PCM_SUBFORMAT_MSBITS_MAX
Definition pcm.h:290
@ SND_PCM_SUBFORMAT_MSBITS_20
Definition pcm.h:292
@ SND_PCM_SUBFORMAT_UNKNOWN
Definition pcm.h:286
@ SND_PCM_SUBFORMAT_MSBITS_24
Definition pcm.h:294
@ SND_PCM_AUDIO_TSTAMP_TYPE_DEFAULT
Definition pcm.h:369
@ SND_PCM_AUDIO_TSTAMP_TYPE_LINK_ESTIMATED
Definition pcm.h:372
@ SND_PCM_AUDIO_TSTAMP_TYPE_LINK_SYNCHRONIZED
Definition pcm.h:373
@ SND_PCM_AUDIO_TSTAMP_TYPE_LINK
Definition pcm.h:370
@ SND_PCM_AUDIO_TSTAMP_TYPE_LINK_ABSOLUTE
Definition pcm.h:371
@ SND_PCM_AUDIO_TSTAMP_TYPE_COMPAT
Definition pcm.h:368
@ SND_PCM_STATE_PREPARED
Definition pcm.h:305
@ SND_PCM_STATE_PRIVATE1
Definition pcm.h:320
@ SND_PCM_STATE_OPEN
Definition pcm.h:301
@ SND_PCM_STATE_SETUP
Definition pcm.h:303
@ SND_PCM_STATE_SUSPENDED
Definition pcm.h:315
@ SND_PCM_STATE_RUNNING
Definition pcm.h:307
@ SND_PCM_STATE_DRAINING
Definition pcm.h:311
@ SND_PCM_STATE_PAUSED
Definition pcm.h:313
@ SND_PCM_STATE_DISCONNECTED
Definition pcm.h:317
@ SND_PCM_STATE_XRUN
Definition pcm.h:309
@ SND_PCM_ACCESS_MMAP_COMPLEX
Definition pcm.h:116
@ SND_PCM_ACCESS_RW_INTERLEAVED
Definition pcm.h:118
@ SND_PCM_ACCESS_MMAP_NONINTERLEAVED
Definition pcm.h:114
@ SND_PCM_ACCESS_MMAP_INTERLEAVED
Definition pcm.h:112
@ SND_PCM_ACCESS_RW_NONINTERLEAVED
Definition pcm.h:120
@ SND_PCM_XRUN_NONE
Definition pcm.h:335
@ SND_PCM_XRUN_STOP
Definition pcm.h:337
@ SND_PCM_TSTAMP_MMAP
Definition pcm.h:350
@ SND_PCM_TSTAMP_ENABLE
Definition pcm.h:346
@ SND_PCM_TSTAMP_NONE
Definition pcm.h:344
@ SND_PCM_SUBCLASS_GENERIC_MIX
Definition pcm.h:94
@ SND_PCM_SUBCLASS_MULTI_MIX
Definition pcm.h:96
@ SND_PCM_TSTAMP_TYPE_GETTIMEOFDAY
Definition pcm.h:356
@ SND_PCM_TSTAMP_TYPE_MONOTONIC
Definition pcm.h:357
@ SND_PCM_TSTAMP_TYPE_MONOTONIC_RAW
Definition pcm.h:358
@ SND_PCM_FORMAT_U16
Definition pcm.h:236
@ SND_PCM_FORMAT_U24
Definition pcm.h:240
@ SND_PCM_FORMAT_S24_LE
Definition pcm.h:141
@ SND_PCM_FORMAT_FLOAT_LE
Definition pcm.h:157
@ SND_PCM_FORMAT_U18_3BE
Definition pcm.h:211
@ SND_PCM_FORMAT_FLOAT64
Definition pcm.h:248
@ SND_PCM_FORMAT_U20_3LE
Definition pcm.h:201
@ SND_PCM_FORMAT_S20_3BE
Definition pcm.h:199
@ SND_PCM_FORMAT_S20_BE
Definition pcm.h:181
@ SND_PCM_FORMAT_MU_LAW
Definition pcm.h:169
@ SND_PCM_FORMAT_S24_3LE
Definition pcm.h:189
@ SND_PCM_FORMAT_S24_BE
Definition pcm.h:143
@ SND_PCM_FORMAT_U24_3BE
Definition pcm.h:195
@ SND_PCM_FORMAT_U24_BE
Definition pcm.h:147
@ SND_PCM_FORMAT_GSM
Definition pcm.h:177
@ SND_PCM_FORMAT_U24_LE
Definition pcm.h:145
@ SND_PCM_FORMAT_IEC958_SUBFRAME_BE
Definition pcm.h:167
@ SND_PCM_FORMAT_MPEG
Definition pcm.h:175
@ SND_PCM_FORMAT_S20
Definition pcm.h:252
@ SND_PCM_FORMAT_U18_3LE
Definition pcm.h:209
@ SND_PCM_FORMAT_IEC958_SUBFRAME_LE
Definition pcm.h:165
@ SND_PCM_FORMAT_U32_LE
Definition pcm.h:153
@ SND_PCM_FORMAT_S24_3BE
Definition pcm.h:191
@ SND_PCM_FORMAT_S8
Definition pcm.h:129
@ SND_PCM_FORMAT_U24_3LE
Definition pcm.h:193
@ SND_PCM_FORMAT_SPECIAL
Definition pcm.h:187
@ SND_PCM_FORMAT_FLOAT
Definition pcm.h:246
@ SND_PCM_FORMAT_IEC958_SUBFRAME
Definition pcm.h:250
@ SND_PCM_FORMAT_S18_3LE
Definition pcm.h:205
@ SND_PCM_FORMAT_S16_LE
Definition pcm.h:133
@ SND_PCM_FORMAT_U20_3BE
Definition pcm.h:203
@ SND_PCM_FORMAT_FLOAT64_LE
Definition pcm.h:161
@ SND_PCM_FORMAT_S20_3LE
Definition pcm.h:197
@ SND_PCM_FORMAT_FLOAT64_BE
Definition pcm.h:163
@ SND_PCM_FORMAT_IMA_ADPCM
Definition pcm.h:173
@ SND_PCM_FORMAT_A_LAW
Definition pcm.h:171
@ SND_PCM_FORMAT_S16_BE
Definition pcm.h:135
@ SND_PCM_FORMAT_S32_LE
Definition pcm.h:149
@ SND_PCM_FORMAT_S16
Definition pcm.h:234
@ SND_PCM_FORMAT_UNKNOWN
Definition pcm.h:127
@ SND_PCM_FORMAT_FLOAT_BE
Definition pcm.h:159
@ SND_PCM_FORMAT_U16_LE
Definition pcm.h:137
@ SND_PCM_FORMAT_U32
Definition pcm.h:244
@ SND_PCM_FORMAT_U20_BE
Definition pcm.h:185
@ SND_PCM_FORMAT_S32
Definition pcm.h:242
@ SND_PCM_FORMAT_S20_LE
Definition pcm.h:179
@ SND_PCM_FORMAT_U32_BE
Definition pcm.h:155
@ SND_PCM_FORMAT_U20
Definition pcm.h:254
@ SND_PCM_FORMAT_S24
Definition pcm.h:238
@ SND_PCM_FORMAT_S32_BE
Definition pcm.h:151
@ SND_PCM_FORMAT_S18_3BE
Definition pcm.h:207
@ SND_PCM_FORMAT_U8
Definition pcm.h:131
@ SND_PCM_FORMAT_U16_BE
Definition pcm.h:139
@ SND_PCM_FORMAT_U20_LE
Definition pcm.h:183
@ SND_PCM_STREAM_PLAYBACK
Definition pcm.h:103
@ SND_PCM_STREAM_CAPTURE
Definition pcm.h:105
@ SND_PCM_CLASS_MULTI
Definition pcm.h:83
@ SND_PCM_CLASS_GENERIC
Definition pcm.h:81
@ SND_PCM_CLASS_DIGITIZER
Definition pcm.h:87
@ SND_PCM_CLASS_MODEM
Definition pcm.h:85
@ SND_CHMAP_TYPE_NONE
Definition pcm.h:581
@ SND_CHMAP_TYPE_LAST
Definition pcm.h:585
@ SND_CHMAP_TYPE_FIXED
Definition pcm.h:582
@ SND_CHMAP_TYPE_VAR
Definition pcm.h:583
@ SND_CHMAP_TYPE_PAIRED
Definition pcm.h:584
Definition pcm.h:378
unsigned int type_requested
Definition pcm.h:380
unsigned int report_delay
Definition pcm.h:381
Definition pcm.h:385
unsigned int accuracy_report
Definition pcm.h:391
unsigned int actual_type
Definition pcm.h:389
unsigned int valid
Definition pcm.h:388
unsigned int accuracy
Definition pcm.h:392
Definition pcm.h:492
void * addr
Definition pcm.h:494
unsigned int first
Definition pcm.h:496
unsigned int step
Definition pcm.h:498
Definition pcm.h:645
snd_pcm_chmap_t map
Definition pcm.h:647
enum snd_pcm_chmap_type type
Definition pcm.h:646
Definition pcm.h:639
unsigned int channels
Definition pcm.h:640
Definition pcm.h:1259
Definition pcm.h:502