3 * \brief Application interface library for the ALSA driver
4 * \author Jaroslav Kysela <perex@perex.cz>
5 * \author Abramo Bagnara <abramo@alsa-project.org>
6 * \author Takashi Iwai <tiwai@suse.de>
9 * Application interface library for the ALSA driver.
10 * See the \ref pcm page for more details.
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.
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.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
37 * \defgroup PCM PCM Interface
38 * See the \ref pcm page for more details.
42 /** dlsym version for interface entry callback */
43 #define SND_PCM_DLSYM_VERSION _dlsym_pcm_001
45 /** PCM generic info container */
46 typedef struct _snd_pcm_info snd_pcm_info_t;
48 /** PCM hardware configuration space container
50 * snd_pcm_hw_params_t is an opaque structure which contains a set of possible
51 * PCM hardware configurations. For example, a given instance might include a
52 * range of buffer sizes, a range of period sizes, and a set of several sample
53 * formats. Some subset of all possible combinations these sets may be valid,
54 * but not necessarily any combination will be valid.
56 * When a parameter is set or restricted using a snd_pcm_hw_params_set*
57 * function, all of the other ranges will be updated to exclude as many
58 * impossible configurations as possible. Attempting to set a parameter
59 * outside of its acceptable range will result in the function failing
60 * and an error code being returned.
62 typedef struct _snd_pcm_hw_params snd_pcm_hw_params_t;
64 /** PCM software configuration container */
65 typedef struct _snd_pcm_sw_params snd_pcm_sw_params_t;
66 /** PCM status container */
67 typedef struct _snd_pcm_status snd_pcm_status_t;
68 /** PCM access types mask */
69 typedef struct _snd_pcm_access_mask snd_pcm_access_mask_t;
70 /** PCM formats mask */
71 typedef struct _snd_pcm_format_mask snd_pcm_format_mask_t;
72 /** PCM subformats mask */
73 typedef struct _snd_pcm_subformat_mask snd_pcm_subformat_mask_t;
76 typedef enum _snd_pcm_class {
77 /** standard device */
79 SND_PCM_CLASS_GENERIC = 0,
80 /** multichannel device */
82 /** software modem device */
84 /** digitizer device */
85 SND_PCM_CLASS_DIGITIZER,
86 SND_PCM_CLASS_LAST = SND_PCM_CLASS_DIGITIZER
90 typedef enum _snd_pcm_subclass {
91 /** subdevices are mixed together */
92 SND_PCM_SUBCLASS_GENERIC_MIX = 0,
93 /** multichannel subdevices are mixed together */
94 SND_PCM_SUBCLASS_MULTI_MIX,
95 SND_PCM_SUBCLASS_LAST = SND_PCM_SUBCLASS_MULTI_MIX
98 /** PCM stream (direction) */
99 typedef enum _snd_pcm_stream {
100 /** Playback stream */
101 SND_PCM_STREAM_PLAYBACK = 0,
102 /** Capture stream */
103 SND_PCM_STREAM_CAPTURE,
104 SND_PCM_STREAM_LAST = SND_PCM_STREAM_CAPTURE
107 /** PCM access type */
108 typedef enum _snd_pcm_access {
109 /** mmap access with simple interleaved channels */
110 SND_PCM_ACCESS_MMAP_INTERLEAVED = 0,
111 /** mmap access with simple non interleaved channels */
112 SND_PCM_ACCESS_MMAP_NONINTERLEAVED,
113 /** mmap access with complex placement */
114 SND_PCM_ACCESS_MMAP_COMPLEX,
115 /** snd_pcm_readi/snd_pcm_writei access */
116 SND_PCM_ACCESS_RW_INTERLEAVED,
117 /** snd_pcm_readn/snd_pcm_writen access */
118 SND_PCM_ACCESS_RW_NONINTERLEAVED,
119 SND_PCM_ACCESS_LAST = SND_PCM_ACCESS_RW_NONINTERLEAVED
122 /** PCM sample format */
123 typedef enum _snd_pcm_format {
125 SND_PCM_FORMAT_UNKNOWN = -1,
127 SND_PCM_FORMAT_S8 = 0,
128 /** Unsigned 8 bit */
130 /** Signed 16 bit Little Endian */
131 SND_PCM_FORMAT_S16_LE,
132 /** Signed 16 bit Big Endian */
133 SND_PCM_FORMAT_S16_BE,
134 /** Unsigned 16 bit Little Endian */
135 SND_PCM_FORMAT_U16_LE,
136 /** Unsigned 16 bit Big Endian */
137 SND_PCM_FORMAT_U16_BE,
138 /** Signed 24 bit Little Endian using low three bytes in 32-bit word */
139 SND_PCM_FORMAT_S24_LE,
140 /** Signed 24 bit Big Endian using low three bytes in 32-bit word */
141 SND_PCM_FORMAT_S24_BE,
142 /** Unsigned 24 bit Little Endian using low three bytes in 32-bit word */
143 SND_PCM_FORMAT_U24_LE,
144 /** Unsigned 24 bit Big Endian using low three bytes in 32-bit word */
145 SND_PCM_FORMAT_U24_BE,
146 /** Signed 32 bit Little Endian */
147 SND_PCM_FORMAT_S32_LE,
148 /** Signed 32 bit Big Endian */
149 SND_PCM_FORMAT_S32_BE,
150 /** Unsigned 32 bit Little Endian */
151 SND_PCM_FORMAT_U32_LE,
152 /** Unsigned 32 bit Big Endian */
153 SND_PCM_FORMAT_U32_BE,
154 /** Float 32 bit Little Endian, Range -1.0 to 1.0 */
155 SND_PCM_FORMAT_FLOAT_LE,
156 /** Float 32 bit Big Endian, Range -1.0 to 1.0 */
157 SND_PCM_FORMAT_FLOAT_BE,
158 /** Float 64 bit Little Endian, Range -1.0 to 1.0 */
159 SND_PCM_FORMAT_FLOAT64_LE,
160 /** Float 64 bit Big Endian, Range -1.0 to 1.0 */
161 SND_PCM_FORMAT_FLOAT64_BE,
162 /** IEC-958 Little Endian */
163 SND_PCM_FORMAT_IEC958_SUBFRAME_LE,
164 /** IEC-958 Big Endian */
165 SND_PCM_FORMAT_IEC958_SUBFRAME_BE,
167 SND_PCM_FORMAT_MU_LAW,
169 SND_PCM_FORMAT_A_LAW,
171 SND_PCM_FORMAT_IMA_ADPCM,
177 SND_PCM_FORMAT_SPECIAL = 31,
178 /** Signed 24bit Little Endian in 3bytes format */
179 SND_PCM_FORMAT_S24_3LE = 32,
180 /** Signed 24bit Big Endian in 3bytes format */
181 SND_PCM_FORMAT_S24_3BE,
182 /** Unsigned 24bit Little Endian in 3bytes format */
183 SND_PCM_FORMAT_U24_3LE,
184 /** Unsigned 24bit Big Endian in 3bytes format */
185 SND_PCM_FORMAT_U24_3BE,
186 /** Signed 20bit Little Endian in 3bytes format */
187 SND_PCM_FORMAT_S20_3LE,
188 /** Signed 20bit Big Endian in 3bytes format */
189 SND_PCM_FORMAT_S20_3BE,
190 /** Unsigned 20bit Little Endian in 3bytes format */
191 SND_PCM_FORMAT_U20_3LE,
192 /** Unsigned 20bit Big Endian in 3bytes format */
193 SND_PCM_FORMAT_U20_3BE,
194 /** Signed 18bit Little Endian in 3bytes format */
195 SND_PCM_FORMAT_S18_3LE,
196 /** Signed 18bit Big Endian in 3bytes format */
197 SND_PCM_FORMAT_S18_3BE,
198 /** Unsigned 18bit Little Endian in 3bytes format */
199 SND_PCM_FORMAT_U18_3LE,
200 /** Unsigned 18bit Big Endian in 3bytes format */
201 SND_PCM_FORMAT_U18_3BE,
202 /* G.723 (ADPCM) 24 kbit/s, 8 samples in 3 bytes */
203 SND_PCM_FORMAT_G723_24,
204 /* G.723 (ADPCM) 24 kbit/s, 1 sample in 1 byte */
205 SND_PCM_FORMAT_G723_24_1B,
206 /* G.723 (ADPCM) 40 kbit/s, 8 samples in 3 bytes */
207 SND_PCM_FORMAT_G723_40,
208 /* G.723 (ADPCM) 40 kbit/s, 1 sample in 1 byte */
209 SND_PCM_FORMAT_G723_40_1B,
210 /* Direct Stream Digital (DSD) in 1-byte samples (x8) */
211 SND_PCM_FORMAT_DSD_U8,
212 /* Direct Stream Digital (DSD) in 2-byte samples (x16) */
213 SND_PCM_FORMAT_DSD_U16_LE,
214 /* Direct Stream Digital (DSD) in 4-byte samples (x32) */
215 SND_PCM_FORMAT_DSD_U32_LE,
216 /* Direct Stream Digital (DSD) in 2-byte samples (x16) */
217 SND_PCM_FORMAT_DSD_U16_BE,
218 /* Direct Stream Digital (DSD) in 4-byte samples (x32) */
219 SND_PCM_FORMAT_DSD_U32_BE,
220 SND_PCM_FORMAT_LAST = SND_PCM_FORMAT_DSD_U32_BE,
222 #if __BYTE_ORDER == __LITTLE_ENDIAN
223 /** Signed 16 bit CPU endian */
224 SND_PCM_FORMAT_S16 = SND_PCM_FORMAT_S16_LE,
225 /** Unsigned 16 bit CPU endian */
226 SND_PCM_FORMAT_U16 = SND_PCM_FORMAT_U16_LE,
227 /** Signed 24 bit CPU endian */
228 SND_PCM_FORMAT_S24 = SND_PCM_FORMAT_S24_LE,
229 /** Unsigned 24 bit CPU endian */
230 SND_PCM_FORMAT_U24 = SND_PCM_FORMAT_U24_LE,
231 /** Signed 32 bit CPU endian */
232 SND_PCM_FORMAT_S32 = SND_PCM_FORMAT_S32_LE,
233 /** Unsigned 32 bit CPU endian */
234 SND_PCM_FORMAT_U32 = SND_PCM_FORMAT_U32_LE,
235 /** Float 32 bit CPU endian */
236 SND_PCM_FORMAT_FLOAT = SND_PCM_FORMAT_FLOAT_LE,
237 /** Float 64 bit CPU endian */
238 SND_PCM_FORMAT_FLOAT64 = SND_PCM_FORMAT_FLOAT64_LE,
239 /** IEC-958 CPU Endian */
240 SND_PCM_FORMAT_IEC958_SUBFRAME = SND_PCM_FORMAT_IEC958_SUBFRAME_LE
241 #elif __BYTE_ORDER == __BIG_ENDIAN
242 /** Signed 16 bit CPU endian */
243 SND_PCM_FORMAT_S16 = SND_PCM_FORMAT_S16_BE,
244 /** Unsigned 16 bit CPU endian */
245 SND_PCM_FORMAT_U16 = SND_PCM_FORMAT_U16_BE,
246 /** Signed 24 bit CPU endian */
247 SND_PCM_FORMAT_S24 = SND_PCM_FORMAT_S24_BE,
248 /** Unsigned 24 bit CPU endian */
249 SND_PCM_FORMAT_U24 = SND_PCM_FORMAT_U24_BE,
250 /** Signed 32 bit CPU endian */
251 SND_PCM_FORMAT_S32 = SND_PCM_FORMAT_S32_BE,
252 /** Unsigned 32 bit CPU endian */
253 SND_PCM_FORMAT_U32 = SND_PCM_FORMAT_U32_BE,
254 /** Float 32 bit CPU endian */
255 SND_PCM_FORMAT_FLOAT = SND_PCM_FORMAT_FLOAT_BE,
256 /** Float 64 bit CPU endian */
257 SND_PCM_FORMAT_FLOAT64 = SND_PCM_FORMAT_FLOAT64_BE,
258 /** IEC-958 CPU Endian */
259 SND_PCM_FORMAT_IEC958_SUBFRAME = SND_PCM_FORMAT_IEC958_SUBFRAME_BE
261 #error "Unknown endian"
265 /** PCM sample subformat */
266 typedef enum _snd_pcm_subformat {
268 SND_PCM_SUBFORMAT_STD = 0,
269 SND_PCM_SUBFORMAT_LAST = SND_PCM_SUBFORMAT_STD
270 } snd_pcm_subformat_t;
273 typedef enum _snd_pcm_state {
275 SND_PCM_STATE_OPEN = 0,
276 /** Setup installed */
278 /** Ready to start */
279 SND_PCM_STATE_PREPARED,
281 SND_PCM_STATE_RUNNING,
282 /** Stopped: underrun (playback) or overrun (capture) detected */
284 /** Draining: running (playback) or stopped (capture) */
285 SND_PCM_STATE_DRAINING,
287 SND_PCM_STATE_PAUSED,
288 /** Hardware is suspended */
289 SND_PCM_STATE_SUSPENDED,
290 /** Hardware is disconnected */
291 SND_PCM_STATE_DISCONNECTED,
292 SND_PCM_STATE_LAST = SND_PCM_STATE_DISCONNECTED
295 /** PCM start mode */
296 typedef enum _snd_pcm_start {
297 /** Automatic start on data read/write */
298 SND_PCM_START_DATA = 0,
299 /** Explicit start */
300 SND_PCM_START_EXPLICIT,
301 SND_PCM_START_LAST = SND_PCM_START_EXPLICIT
305 typedef enum _snd_pcm_xrun {
306 /** Xrun detection disabled */
307 SND_PCM_XRUN_NONE = 0,
308 /** Stop on xrun detection */
310 SND_PCM_XRUN_LAST = SND_PCM_XRUN_STOP
313 /** PCM timestamp mode */
314 typedef enum _snd_pcm_tstamp {
316 SND_PCM_TSTAMP_NONE = 0,
317 /** Update timestamp at every hardware position update */
318 SND_PCM_TSTAMP_ENABLE,
319 /** Equivalent with #SND_PCM_TSTAMP_ENABLE,
320 * just for compatibility with older versions
322 SND_PCM_TSTAMP_MMAP = SND_PCM_TSTAMP_ENABLE,
323 SND_PCM_TSTAMP_LAST = SND_PCM_TSTAMP_ENABLE
326 typedef enum _snd_pcm_tstamp_type {
327 SND_PCM_TSTAMP_TYPE_GETTIMEOFDAY = 0, /**< gettimeofday equivalent */
328 SND_PCM_TSTAMP_TYPE_MONOTONIC, /**< posix_clock_monotonic equivalent */
329 SND_PCM_TSTAMP_TYPE_MONOTONIC_RAW, /**< monotonic_raw (no NTP) */
330 SND_PCM_TSTAMP_TYPE_LAST = SND_PCM_TSTAMP_TYPE_MONOTONIC_RAW,
331 } snd_pcm_tstamp_type_t;
333 typedef struct _snd_pcm_audio_tstamp_config {
334 /* 5 of max 16 bits used */
335 unsigned int type_requested:4;
336 unsigned int report_delay:1; /* add total delay to A/D or D/A */
337 } snd_pcm_audio_tstamp_config_t;
339 typedef struct _snd_pcm_audio_tstamp_report {
340 /* 6 of max 16 bits used for bit-fields */
342 /* for backwards compatibility */
343 unsigned int valid:1;
345 /* actual type if hardware could not support requested timestamp */
346 unsigned int actual_type:4;
348 /* accuracy represented in ns units */
349 unsigned int accuracy_report:1; /* 0 if accuracy unknown, 1 if accuracy field is valid */
350 unsigned int accuracy; /* up to 4.29s, will be packed in separate field */
351 } snd_pcm_audio_tstamp_report_t;
353 /** Unsigned frames quantity */
354 typedef unsigned long snd_pcm_uframes_t;
355 /** Signed frames quantity */
356 typedef long snd_pcm_sframes_t;
358 /** Non blocking mode (flag for open mode) \hideinitializer */
359 #define SND_PCM_NONBLOCK 0x00000001
360 /** Async notification (flag for open mode) \hideinitializer */
361 #define SND_PCM_ASYNC 0x00000002
362 /** In an abort state (internal, not allowed for open) */
363 #define SND_PCM_ABORT 0x00008000
364 /** Disable automatic (but not forced!) rate resamplinig */
365 #define SND_PCM_NO_AUTO_RESAMPLE 0x00010000
366 /** Disable automatic (but not forced!) channel conversion */
367 #define SND_PCM_NO_AUTO_CHANNELS 0x00020000
368 /** Disable automatic (but not forced!) format conversion */
369 #define SND_PCM_NO_AUTO_FORMAT 0x00040000
370 /** Disable soft volume control */
371 #define SND_PCM_NO_SOFTVOL 0x00080000
374 typedef struct _snd_pcm snd_pcm_t;
378 /** Kernel level PCM */
382 /** One or more linked PCM with exclusive access to selected
385 /** File writing plugin */
387 /** Null endpoint PCM */
389 /** Shared memory client PCM */
391 /** INET client PCM (not yet implemented) */
393 /** Copying plugin */
395 /** Linear format conversion PCM */
397 /** A-Law format conversion PCM */
399 /** Mu-Law format conversion PCM */
401 /** IMA-ADPCM format conversion PCM */
403 /** Rate conversion PCM */
405 /** Attenuated static route PCM */
407 /** Format adjusted PCM */
415 /** Attenuated dynamic route PCM (not yet implemented) */
417 /** Loopback server plugin (not yet implemented) */
418 SND_PCM_TYPE_LBSERVER,
419 /** Linear Integer <-> Linear Float format conversion PCM */
420 SND_PCM_TYPE_LINEAR_FLOAT,
421 /** LADSPA integration plugin */
423 /** Direct Mixing plugin */
425 /** Jack Audio Connection Kit plugin */
427 /** Direct Snooping plugin */
429 /** Direct Sharing plugin */
431 /** IEC958 subframe plugin */
433 /** Soft volume plugin */
434 SND_PCM_TYPE_SOFTVOL,
435 /** External I/O plugin */
437 /** External filter plugin */
438 SND_PCM_TYPE_EXTPLUG,
439 /** Mmap-emulation plugin */
440 SND_PCM_TYPE_MMAP_EMUL,
441 SND_PCM_TYPE_LAST = SND_PCM_TYPE_MMAP_EMUL
445 typedef enum _snd_pcm_type snd_pcm_type_t;
447 /** PCM area specification */
448 typedef struct _snd_pcm_channel_area {
449 /** base address of channel samples */
451 /** offset to first sample in bits */
453 /** samples distance in bits */
455 } snd_pcm_channel_area_t;
457 /** PCM synchronization ID */
458 typedef union _snd_pcm_sync_id {
460 unsigned char id[16];
462 unsigned short id16[8];
464 unsigned int id32[4];
467 /** #SND_PCM_TYPE_METER scope handle */
468 typedef struct _snd_pcm_scope snd_pcm_scope_t;
470 int snd_pcm_open(snd_pcm_t **pcm, const char *name,
471 snd_pcm_stream_t stream, int mode);
472 int snd_pcm_open_lconf(snd_pcm_t **pcm, const char *name,
473 snd_pcm_stream_t stream, int mode,
474 snd_config_t *lconf);
475 int snd_pcm_open_fallback(snd_pcm_t **pcm, snd_config_t *root,
476 const char *name, const char *orig_name,
477 snd_pcm_stream_t stream, int mode);
479 int snd_pcm_close(snd_pcm_t *pcm);
480 const char *snd_pcm_name(snd_pcm_t *pcm);
481 snd_pcm_type_t snd_pcm_type(snd_pcm_t *pcm);
482 snd_pcm_stream_t snd_pcm_stream(snd_pcm_t *pcm);
483 int snd_pcm_poll_descriptors_count(snd_pcm_t *pcm);
484 int snd_pcm_poll_descriptors(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int space);
485 int snd_pcm_poll_descriptors_revents(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
486 int snd_pcm_nonblock(snd_pcm_t *pcm, int nonblock);
487 static __inline__ int snd_pcm_abort(snd_pcm_t *pcm) { return snd_pcm_nonblock(pcm, 2); }
488 int snd_async_add_pcm_handler(snd_async_handler_t **handler, snd_pcm_t *pcm,
489 snd_async_callback_t callback, void *private_data);
490 snd_pcm_t *snd_async_handler_get_pcm(snd_async_handler_t *handler);
491 int snd_pcm_info(snd_pcm_t *pcm, snd_pcm_info_t *info);
492 int snd_pcm_hw_params_current(snd_pcm_t *pcm, snd_pcm_hw_params_t *params);
493 int snd_pcm_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t *params);
494 int snd_pcm_hw_free(snd_pcm_t *pcm);
495 int snd_pcm_sw_params_current(snd_pcm_t *pcm, snd_pcm_sw_params_t *params);
496 int snd_pcm_sw_params(snd_pcm_t *pcm, snd_pcm_sw_params_t *params);
497 int snd_pcm_prepare(snd_pcm_t *pcm);
498 int snd_pcm_reset(snd_pcm_t *pcm);
499 int snd_pcm_status(snd_pcm_t *pcm, snd_pcm_status_t *status);
500 int snd_pcm_start(snd_pcm_t *pcm);
501 int snd_pcm_drop(snd_pcm_t *pcm);
502 int snd_pcm_drain(snd_pcm_t *pcm);
503 int snd_pcm_pause(snd_pcm_t *pcm, int enable);
504 snd_pcm_state_t snd_pcm_state(snd_pcm_t *pcm);
505 int snd_pcm_hwsync(snd_pcm_t *pcm);
506 int snd_pcm_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp);
507 int snd_pcm_resume(snd_pcm_t *pcm);
508 int snd_pcm_htimestamp(snd_pcm_t *pcm, snd_pcm_uframes_t *avail, snd_htimestamp_t *tstamp);
509 snd_pcm_sframes_t snd_pcm_avail(snd_pcm_t *pcm);
510 snd_pcm_sframes_t snd_pcm_avail_update(snd_pcm_t *pcm);
511 int snd_pcm_avail_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *availp, snd_pcm_sframes_t *delayp);
512 snd_pcm_sframes_t snd_pcm_rewindable(snd_pcm_t *pcm);
513 snd_pcm_sframes_t snd_pcm_rewind(snd_pcm_t *pcm, snd_pcm_uframes_t frames);
514 snd_pcm_sframes_t snd_pcm_forwardable(snd_pcm_t *pcm);
515 snd_pcm_sframes_t snd_pcm_forward(snd_pcm_t *pcm, snd_pcm_uframes_t frames);
516 snd_pcm_sframes_t snd_pcm_writei(snd_pcm_t *pcm, const void *buffer, snd_pcm_uframes_t size);
517 snd_pcm_sframes_t snd_pcm_readi(snd_pcm_t *pcm, void *buffer, snd_pcm_uframes_t size);
518 snd_pcm_sframes_t snd_pcm_writen(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size);
519 snd_pcm_sframes_t snd_pcm_readn(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size);
520 int snd_pcm_wait(snd_pcm_t *pcm, int timeout);
522 int snd_pcm_link(snd_pcm_t *pcm1, snd_pcm_t *pcm2);
523 int snd_pcm_unlink(snd_pcm_t *pcm);
525 /** channel mapping API version number */
526 #define SND_CHMAP_API_VERSION ((1 << 16) | (0 << 8) | 1)
528 /** channel map list type */
529 enum snd_pcm_chmap_type {
530 SND_CHMAP_TYPE_NONE = 0,/**< unspecified channel position */
531 SND_CHMAP_TYPE_FIXED, /**< fixed channel position */
532 SND_CHMAP_TYPE_VAR, /**< freely swappable channel position */
533 SND_CHMAP_TYPE_PAIRED, /**< pair-wise swappable channel position */
534 SND_CHMAP_TYPE_LAST = SND_CHMAP_TYPE_PAIRED, /**< last entry */
537 /** channel positions */
538 enum snd_pcm_chmap_position {
539 SND_CHMAP_UNKNOWN = 0, /**< unspecified */
540 SND_CHMAP_NA, /**< N/A, silent */
541 SND_CHMAP_MONO, /**< mono stream */
542 SND_CHMAP_FL, /**< front left */
543 SND_CHMAP_FR, /**< front right */
544 SND_CHMAP_RL, /**< rear left */
545 SND_CHMAP_RR, /**< rear right */
546 SND_CHMAP_FC, /**< front center */
547 SND_CHMAP_LFE, /**< LFE */
548 SND_CHMAP_SL, /**< side left */
549 SND_CHMAP_SR, /**< side right */
550 SND_CHMAP_RC, /**< rear center */
551 SND_CHMAP_FLC, /**< front left center */
552 SND_CHMAP_FRC, /**< front right center */
553 SND_CHMAP_RLC, /**< rear left center */
554 SND_CHMAP_RRC, /**< rear right center */
555 SND_CHMAP_FLW, /**< front left wide */
556 SND_CHMAP_FRW, /**< front right wide */
557 SND_CHMAP_FLH, /**< front left high */
558 SND_CHMAP_FCH, /**< front center high */
559 SND_CHMAP_FRH, /**< front right high */
560 SND_CHMAP_TC, /**< top center */
561 SND_CHMAP_TFL, /**< top front left */
562 SND_CHMAP_TFR, /**< top front right */
563 SND_CHMAP_TFC, /**< top front center */
564 SND_CHMAP_TRL, /**< top rear left */
565 SND_CHMAP_TRR, /**< top rear right */
566 SND_CHMAP_TRC, /**< top rear center */
567 SND_CHMAP_TFLC, /**< top front left center */
568 SND_CHMAP_TFRC, /**< top front right center */
569 SND_CHMAP_TSL, /**< top side left */
570 SND_CHMAP_TSR, /**< top side right */
571 SND_CHMAP_LLFE, /**< left LFE */
572 SND_CHMAP_RLFE, /**< right LFE */
573 SND_CHMAP_BC, /**< bottom center */
574 SND_CHMAP_BLC, /**< bottom left center */
575 SND_CHMAP_BRC, /**< bottom right center */
576 SND_CHMAP_LAST = SND_CHMAP_BRC,
579 /** bitmask for channel position */
580 #define SND_CHMAP_POSITION_MASK 0xffff
582 /** bit flag indicating the channel is phase inverted */
583 #define SND_CHMAP_PHASE_INVERSE (0x01 << 16)
584 /** bit flag indicating the non-standard channel value */
585 #define SND_CHMAP_DRIVER_SPEC (0x02 << 16)
587 /** the channel map header */
588 typedef struct snd_pcm_chmap {
589 unsigned int channels; /**< number of channels */
590 unsigned int pos[0]; /**< channel position array */
593 /** the header of array items returned from snd_pcm_query_chmaps() */
594 typedef struct snd_pcm_chmap_query {
595 enum snd_pcm_chmap_type type; /**< channel map type */
596 snd_pcm_chmap_t map; /**< available channel map */
597 } snd_pcm_chmap_query_t;
600 snd_pcm_chmap_query_t **snd_pcm_query_chmaps(snd_pcm_t *pcm);
601 snd_pcm_chmap_query_t **snd_pcm_query_chmaps_from_hw(int card, int dev,
603 snd_pcm_stream_t stream);
604 void snd_pcm_free_chmaps(snd_pcm_chmap_query_t **maps);
605 snd_pcm_chmap_t *snd_pcm_get_chmap(snd_pcm_t *pcm);
606 int snd_pcm_set_chmap(snd_pcm_t *pcm, const snd_pcm_chmap_t *map);
608 const char *snd_pcm_chmap_type_name(enum snd_pcm_chmap_type val);
609 const char *snd_pcm_chmap_name(enum snd_pcm_chmap_position val);
610 const char *snd_pcm_chmap_long_name(enum snd_pcm_chmap_position val);
611 int snd_pcm_chmap_print(const snd_pcm_chmap_t *map, size_t maxlen, char *buf);
612 unsigned int snd_pcm_chmap_from_string(const char *str);
613 snd_pcm_chmap_t *snd_pcm_chmap_parse_string(const char *str);
615 //int snd_pcm_mixer_element(snd_pcm_t *pcm, snd_mixer_t *mixer, snd_mixer_elem_t **elem);
618 * application helpers - these functions are implemented on top
622 int snd_pcm_recover(snd_pcm_t *pcm, int err, int silent);
623 int snd_pcm_set_params(snd_pcm_t *pcm,
624 snd_pcm_format_t format,
625 snd_pcm_access_t access,
626 unsigned int channels,
629 unsigned int latency);
630 int snd_pcm_get_params(snd_pcm_t *pcm,
631 snd_pcm_uframes_t *buffer_size,
632 snd_pcm_uframes_t *period_size);
637 * \defgroup PCM_Info Stream Information
639 * See the \ref pcm page for more details.
643 size_t snd_pcm_info_sizeof(void);
645 * \brief allocate an invalid #snd_pcm_info_t using standard alloca
646 * \param ptr returned pointer
648 #define snd_pcm_info_alloca(ptr) __snd_alloca(ptr, snd_pcm_info)
649 int snd_pcm_info_malloc(snd_pcm_info_t **ptr);
650 void snd_pcm_info_free(snd_pcm_info_t *obj);
651 void snd_pcm_info_copy(snd_pcm_info_t *dst, const snd_pcm_info_t *src);
652 unsigned int snd_pcm_info_get_device(const snd_pcm_info_t *obj);
653 unsigned int snd_pcm_info_get_subdevice(const snd_pcm_info_t *obj);
654 snd_pcm_stream_t snd_pcm_info_get_stream(const snd_pcm_info_t *obj);
655 int snd_pcm_info_get_card(const snd_pcm_info_t *obj);
656 const char *snd_pcm_info_get_id(const snd_pcm_info_t *obj);
657 const char *snd_pcm_info_get_name(const snd_pcm_info_t *obj);
658 const char *snd_pcm_info_get_subdevice_name(const snd_pcm_info_t *obj);
659 snd_pcm_class_t snd_pcm_info_get_class(const snd_pcm_info_t *obj);
660 snd_pcm_subclass_t snd_pcm_info_get_subclass(const snd_pcm_info_t *obj);
661 unsigned int snd_pcm_info_get_subdevices_count(const snd_pcm_info_t *obj);
662 unsigned int snd_pcm_info_get_subdevices_avail(const snd_pcm_info_t *obj);
663 snd_pcm_sync_id_t snd_pcm_info_get_sync(const snd_pcm_info_t *obj);
664 void snd_pcm_info_set_device(snd_pcm_info_t *obj, unsigned int val);
665 void snd_pcm_info_set_subdevice(snd_pcm_info_t *obj, unsigned int val);
666 void snd_pcm_info_set_stream(snd_pcm_info_t *obj, snd_pcm_stream_t val);
671 * \defgroup PCM_HW_Params Hardware Parameters
673 * See the \ref pcm page for more details.
677 int snd_pcm_hw_params_any(snd_pcm_t *pcm, snd_pcm_hw_params_t *params);
679 int snd_pcm_hw_params_can_mmap_sample_resolution(const snd_pcm_hw_params_t *params);
680 int snd_pcm_hw_params_is_double(const snd_pcm_hw_params_t *params);
681 int snd_pcm_hw_params_is_batch(const snd_pcm_hw_params_t *params);
682 int snd_pcm_hw_params_is_block_transfer(const snd_pcm_hw_params_t *params);
683 int snd_pcm_hw_params_is_monotonic(const snd_pcm_hw_params_t *params);
684 int snd_pcm_hw_params_can_overrange(const snd_pcm_hw_params_t *params);
685 int snd_pcm_hw_params_can_pause(const snd_pcm_hw_params_t *params);
686 int snd_pcm_hw_params_can_resume(const snd_pcm_hw_params_t *params);
687 int snd_pcm_hw_params_is_half_duplex(const snd_pcm_hw_params_t *params);
688 int snd_pcm_hw_params_is_joint_duplex(const snd_pcm_hw_params_t *params);
689 int snd_pcm_hw_params_can_sync_start(const snd_pcm_hw_params_t *params);
690 int snd_pcm_hw_params_can_disable_period_wakeup(const snd_pcm_hw_params_t *params);
691 int snd_pcm_hw_params_supports_audio_wallclock_ts(const snd_pcm_hw_params_t *params); /* deprecated, use audio_ts_type */
692 int snd_pcm_hw_params_supports_audio_ts_type(const snd_pcm_hw_params_t *params, int type);
693 int snd_pcm_hw_params_get_rate_numden(const snd_pcm_hw_params_t *params,
694 unsigned int *rate_num,
695 unsigned int *rate_den);
696 int snd_pcm_hw_params_get_sbits(const snd_pcm_hw_params_t *params);
697 int snd_pcm_hw_params_get_fifo_size(const snd_pcm_hw_params_t *params);
700 typedef struct _snd_pcm_hw_strategy snd_pcm_hw_strategy_t;
702 /* choices need to be sorted on ascending badness */
703 typedef struct _snd_pcm_hw_strategy_simple_choices_list {
705 unsigned int badness;
706 } snd_pcm_hw_strategy_simple_choices_list_t;
708 int snd_pcm_hw_params_strategy(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,
709 const snd_pcm_hw_strategy_t *strategy,
710 unsigned int badness_min,
711 unsigned int badness_max);
713 void snd_pcm_hw_strategy_free(snd_pcm_hw_strategy_t *strategy);
714 int snd_pcm_hw_strategy_simple(snd_pcm_hw_strategy_t **strategyp,
715 unsigned int badness_min,
716 unsigned int badness_max);
717 int snd_pcm_hw_params_try_explain_failure(snd_pcm_t *pcm,
718 snd_pcm_hw_params_t *fail,
719 snd_pcm_hw_params_t *success,
725 size_t snd_pcm_hw_params_sizeof(void);
727 * \brief allocate an invalid #snd_pcm_hw_params_t using standard alloca
728 * \param ptr returned pointer
730 #define snd_pcm_hw_params_alloca(ptr) __snd_alloca(ptr, snd_pcm_hw_params)
731 int snd_pcm_hw_params_malloc(snd_pcm_hw_params_t **ptr);
732 void snd_pcm_hw_params_free(snd_pcm_hw_params_t *obj);
733 void snd_pcm_hw_params_copy(snd_pcm_hw_params_t *dst, const snd_pcm_hw_params_t *src);
735 #if !defined(ALSA_LIBRARY_BUILD) && !defined(ALSA_PCM_OLD_HW_PARAMS_API)
737 int snd_pcm_hw_params_get_access(const snd_pcm_hw_params_t *params, snd_pcm_access_t *_access);
738 int snd_pcm_hw_params_test_access(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t _access);
739 int snd_pcm_hw_params_set_access(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t _access);
740 int snd_pcm_hw_params_set_access_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t *_access);
741 int snd_pcm_hw_params_set_access_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t *_access);
742 int snd_pcm_hw_params_set_access_mask(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_mask_t *mask);
743 int snd_pcm_hw_params_get_access_mask(snd_pcm_hw_params_t *params, snd_pcm_access_mask_t *mask);
745 int snd_pcm_hw_params_get_format(const snd_pcm_hw_params_t *params, snd_pcm_format_t *val);
746 int snd_pcm_hw_params_test_format(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t val);
747 int snd_pcm_hw_params_set_format(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t val);
748 int snd_pcm_hw_params_set_format_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t *format);
749 int snd_pcm_hw_params_set_format_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t *format);
750 int snd_pcm_hw_params_set_format_mask(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_mask_t *mask);
751 void snd_pcm_hw_params_get_format_mask(snd_pcm_hw_params_t *params, snd_pcm_format_mask_t *mask);
753 int snd_pcm_hw_params_get_subformat(const snd_pcm_hw_params_t *params, snd_pcm_subformat_t *subformat);
754 int snd_pcm_hw_params_test_subformat(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_t subformat);
755 int snd_pcm_hw_params_set_subformat(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_t subformat);
756 int snd_pcm_hw_params_set_subformat_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_t *subformat);
757 int snd_pcm_hw_params_set_subformat_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_t *subformat);
758 int snd_pcm_hw_params_set_subformat_mask(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_mask_t *mask);
759 void snd_pcm_hw_params_get_subformat_mask(snd_pcm_hw_params_t *params, snd_pcm_subformat_mask_t *mask);
761 int snd_pcm_hw_params_get_channels(const snd_pcm_hw_params_t *params, unsigned int *val);
762 int snd_pcm_hw_params_get_channels_min(const snd_pcm_hw_params_t *params, unsigned int *val);
763 int snd_pcm_hw_params_get_channels_max(const snd_pcm_hw_params_t *params, unsigned int *val);
764 int snd_pcm_hw_params_test_channels(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val);
765 int snd_pcm_hw_params_set_channels(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val);
766 int snd_pcm_hw_params_set_channels_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
767 int snd_pcm_hw_params_set_channels_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
768 int snd_pcm_hw_params_set_channels_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, unsigned int *max);
769 int snd_pcm_hw_params_set_channels_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
770 int snd_pcm_hw_params_set_channels_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
771 int snd_pcm_hw_params_set_channels_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
773 int snd_pcm_hw_params_get_rate(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
774 int snd_pcm_hw_params_get_rate_min(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
775 int snd_pcm_hw_params_get_rate_max(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
776 int snd_pcm_hw_params_test_rate(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
777 int snd_pcm_hw_params_set_rate(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
778 int snd_pcm_hw_params_set_rate_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
779 int snd_pcm_hw_params_set_rate_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
780 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);
781 int snd_pcm_hw_params_set_rate_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
782 int snd_pcm_hw_params_set_rate_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
783 int snd_pcm_hw_params_set_rate_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
784 int snd_pcm_hw_params_set_rate_resample(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val);
785 int snd_pcm_hw_params_get_rate_resample(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
786 int snd_pcm_hw_params_set_export_buffer(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val);
787 int snd_pcm_hw_params_get_export_buffer(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
788 int snd_pcm_hw_params_set_period_wakeup(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val);
789 int snd_pcm_hw_params_get_period_wakeup(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);
791 int snd_pcm_hw_params_get_period_time(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
792 int snd_pcm_hw_params_get_period_time_min(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
793 int snd_pcm_hw_params_get_period_time_max(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
794 int snd_pcm_hw_params_test_period_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
795 int snd_pcm_hw_params_set_period_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
796 int snd_pcm_hw_params_set_period_time_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
797 int snd_pcm_hw_params_set_period_time_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
798 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);
799 int snd_pcm_hw_params_set_period_time_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
800 int snd_pcm_hw_params_set_period_time_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
801 int snd_pcm_hw_params_set_period_time_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
803 int snd_pcm_hw_params_get_period_size(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *frames, int *dir);
804 int snd_pcm_hw_params_get_period_size_min(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *frames, int *dir);
805 int snd_pcm_hw_params_get_period_size_max(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *frames, int *dir);
806 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);
807 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);
808 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);
809 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);
810 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);
811 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);
812 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);
813 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);
814 int snd_pcm_hw_params_set_period_size_integer(snd_pcm_t *pcm, snd_pcm_hw_params_t *params);
816 int snd_pcm_hw_params_get_periods(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
817 int snd_pcm_hw_params_get_periods_min(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
818 int snd_pcm_hw_params_get_periods_max(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
819 int snd_pcm_hw_params_test_periods(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
820 int snd_pcm_hw_params_set_periods(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
821 int snd_pcm_hw_params_set_periods_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
822 int snd_pcm_hw_params_set_periods_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
823 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);
824 int snd_pcm_hw_params_set_periods_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
825 int snd_pcm_hw_params_set_periods_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
826 int snd_pcm_hw_params_set_periods_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
827 int snd_pcm_hw_params_set_periods_integer(snd_pcm_t *pcm, snd_pcm_hw_params_t *params);
829 int snd_pcm_hw_params_get_buffer_time(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
830 int snd_pcm_hw_params_get_buffer_time_min(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
831 int snd_pcm_hw_params_get_buffer_time_max(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
832 int snd_pcm_hw_params_test_buffer_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
833 int snd_pcm_hw_params_set_buffer_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
834 int snd_pcm_hw_params_set_buffer_time_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
835 int snd_pcm_hw_params_set_buffer_time_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
836 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);
837 int snd_pcm_hw_params_set_buffer_time_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
838 int snd_pcm_hw_params_set_buffer_time_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
839 int snd_pcm_hw_params_set_buffer_time_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
841 int snd_pcm_hw_params_get_buffer_size(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
842 int snd_pcm_hw_params_get_buffer_size_min(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
843 int snd_pcm_hw_params_get_buffer_size_max(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
844 int snd_pcm_hw_params_test_buffer_size(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val);
845 int snd_pcm_hw_params_set_buffer_size(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val);
846 int snd_pcm_hw_params_set_buffer_size_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
847 int snd_pcm_hw_params_set_buffer_size_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
848 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);
849 int snd_pcm_hw_params_set_buffer_size_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
850 int snd_pcm_hw_params_set_buffer_size_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
851 int snd_pcm_hw_params_set_buffer_size_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
853 #endif /* !ALSA_LIBRARY_BUILD && !ALSA_PCM_OLD_HW_PARAMS_API */
855 int snd_pcm_hw_params_get_min_align(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
860 * \defgroup PCM_SW_Params Software Parameters
862 * See the \ref pcm page for more details.
866 size_t snd_pcm_sw_params_sizeof(void);
868 * \brief allocate an invalid #snd_pcm_sw_params_t using standard alloca
869 * \param ptr returned pointer
871 #define snd_pcm_sw_params_alloca(ptr) __snd_alloca(ptr, snd_pcm_sw_params)
872 int snd_pcm_sw_params_malloc(snd_pcm_sw_params_t **ptr);
873 void snd_pcm_sw_params_free(snd_pcm_sw_params_t *obj);
874 void snd_pcm_sw_params_copy(snd_pcm_sw_params_t *dst, const snd_pcm_sw_params_t *src);
875 int snd_pcm_sw_params_get_boundary(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val);
877 #if !defined(ALSA_LIBRARY_BUILD) && !defined(ALSA_PCM_OLD_SW_PARAMS_API)
879 int snd_pcm_sw_params_set_tstamp_mode(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_tstamp_t val);
880 int snd_pcm_sw_params_get_tstamp_mode(const snd_pcm_sw_params_t *params, snd_pcm_tstamp_t *val);
881 int snd_pcm_sw_params_set_tstamp_type(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_tstamp_type_t val);
882 int snd_pcm_sw_params_get_tstamp_type(const snd_pcm_sw_params_t *params, snd_pcm_tstamp_type_t *val);
883 int snd_pcm_sw_params_set_avail_min(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val);
884 int snd_pcm_sw_params_get_avail_min(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val);
885 int snd_pcm_sw_params_set_period_event(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, int val);
886 int snd_pcm_sw_params_get_period_event(const snd_pcm_sw_params_t *params, int *val);
887 int snd_pcm_sw_params_set_start_threshold(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val);
888 int snd_pcm_sw_params_get_start_threshold(const snd_pcm_sw_params_t *paramsm, snd_pcm_uframes_t *val);
889 int snd_pcm_sw_params_set_stop_threshold(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val);
890 int snd_pcm_sw_params_get_stop_threshold(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val);
891 int snd_pcm_sw_params_set_silence_threshold(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val);
892 int snd_pcm_sw_params_get_silence_threshold(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val);
893 int snd_pcm_sw_params_set_silence_size(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val);
894 int snd_pcm_sw_params_get_silence_size(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val);
896 #endif /* !ALSA_LIBRARY_BUILD && !ALSA_PCM_OLD_SW_PARAMS_API */
900 /* include old API */
901 #ifndef ALSA_LIBRARY_BUILD
902 #if defined(ALSA_PCM_OLD_HW_PARAMS_API) || defined(ALSA_PCM_OLD_SW_PARAMS_API)
908 * \defgroup PCM_Access Access Mask Functions
910 * See the \ref pcm page for more details.
914 size_t snd_pcm_access_mask_sizeof(void);
916 * \brief allocate an empty #snd_pcm_access_mask_t using standard alloca
917 * \param ptr returned pointer
919 #define snd_pcm_access_mask_alloca(ptr) __snd_alloca(ptr, snd_pcm_access_mask)
920 int snd_pcm_access_mask_malloc(snd_pcm_access_mask_t **ptr);
921 void snd_pcm_access_mask_free(snd_pcm_access_mask_t *obj);
922 void snd_pcm_access_mask_copy(snd_pcm_access_mask_t *dst, const snd_pcm_access_mask_t *src);
923 void snd_pcm_access_mask_none(snd_pcm_access_mask_t *mask);
924 void snd_pcm_access_mask_any(snd_pcm_access_mask_t *mask);
925 int snd_pcm_access_mask_test(const snd_pcm_access_mask_t *mask, snd_pcm_access_t val);
926 int snd_pcm_access_mask_empty(const snd_pcm_access_mask_t *mask);
927 void snd_pcm_access_mask_set(snd_pcm_access_mask_t *mask, snd_pcm_access_t val);
928 void snd_pcm_access_mask_reset(snd_pcm_access_mask_t *mask, snd_pcm_access_t val);
933 * \defgroup PCM_Format Format Mask Functions
935 * See the \ref pcm page for more details.
939 size_t snd_pcm_format_mask_sizeof(void);
941 * \brief allocate an empty #snd_pcm_format_mask_t using standard alloca
942 * \param ptr returned pointer
944 #define snd_pcm_format_mask_alloca(ptr) __snd_alloca(ptr, snd_pcm_format_mask)
945 int snd_pcm_format_mask_malloc(snd_pcm_format_mask_t **ptr);
946 void snd_pcm_format_mask_free(snd_pcm_format_mask_t *obj);
947 void snd_pcm_format_mask_copy(snd_pcm_format_mask_t *dst, const snd_pcm_format_mask_t *src);
948 void snd_pcm_format_mask_none(snd_pcm_format_mask_t *mask);
949 void snd_pcm_format_mask_any(snd_pcm_format_mask_t *mask);
950 int snd_pcm_format_mask_test(const snd_pcm_format_mask_t *mask, snd_pcm_format_t val);
951 int snd_pcm_format_mask_empty(const snd_pcm_format_mask_t *mask);
952 void snd_pcm_format_mask_set(snd_pcm_format_mask_t *mask, snd_pcm_format_t val);
953 void snd_pcm_format_mask_reset(snd_pcm_format_mask_t *mask, snd_pcm_format_t val);
958 * \defgroup PCM_SubFormat Subformat Mask Functions
960 * See the \ref pcm page for more details.
964 size_t snd_pcm_subformat_mask_sizeof(void);
966 * \brief allocate an empty #snd_pcm_subformat_mask_t using standard alloca
967 * \param ptr returned pointer
969 #define snd_pcm_subformat_mask_alloca(ptr) __snd_alloca(ptr, snd_pcm_subformat_mask)
970 int snd_pcm_subformat_mask_malloc(snd_pcm_subformat_mask_t **ptr);
971 void snd_pcm_subformat_mask_free(snd_pcm_subformat_mask_t *obj);
972 void snd_pcm_subformat_mask_copy(snd_pcm_subformat_mask_t *dst, const snd_pcm_subformat_mask_t *src);
973 void snd_pcm_subformat_mask_none(snd_pcm_subformat_mask_t *mask);
974 void snd_pcm_subformat_mask_any(snd_pcm_subformat_mask_t *mask);
975 int snd_pcm_subformat_mask_test(const snd_pcm_subformat_mask_t *mask, snd_pcm_subformat_t val);
976 int snd_pcm_subformat_mask_empty(const snd_pcm_subformat_mask_t *mask);
977 void snd_pcm_subformat_mask_set(snd_pcm_subformat_mask_t *mask, snd_pcm_subformat_t val);
978 void snd_pcm_subformat_mask_reset(snd_pcm_subformat_mask_t *mask, snd_pcm_subformat_t val);
983 * \defgroup PCM_Status Status Functions
985 * See the \ref pcm page for more details.
989 size_t snd_pcm_status_sizeof(void);
991 * \brief allocate an invalid #snd_pcm_status_t using standard alloca
992 * \param ptr returned pointer
994 #define snd_pcm_status_alloca(ptr) __snd_alloca(ptr, snd_pcm_status)
995 int snd_pcm_status_malloc(snd_pcm_status_t **ptr);
996 void snd_pcm_status_free(snd_pcm_status_t *obj);
997 void snd_pcm_status_copy(snd_pcm_status_t *dst, const snd_pcm_status_t *src);
998 snd_pcm_state_t snd_pcm_status_get_state(const snd_pcm_status_t *obj);
999 void snd_pcm_status_get_trigger_tstamp(const snd_pcm_status_t *obj, snd_timestamp_t *ptr);
1000 void snd_pcm_status_get_trigger_htstamp(const snd_pcm_status_t *obj, snd_htimestamp_t *ptr);
1001 void snd_pcm_status_get_tstamp(const snd_pcm_status_t *obj, snd_timestamp_t *ptr);
1002 void snd_pcm_status_get_htstamp(const snd_pcm_status_t *obj, snd_htimestamp_t *ptr);
1003 void snd_pcm_status_get_audio_htstamp(const snd_pcm_status_t *obj, snd_htimestamp_t *ptr);
1004 void snd_pcm_status_get_driver_htstamp(const snd_pcm_status_t *obj, snd_htimestamp_t *ptr);
1005 void snd_pcm_status_get_audio_htstamp_report(const snd_pcm_status_t *obj,
1006 snd_pcm_audio_tstamp_report_t *audio_tstamp_report);
1007 void snd_pcm_status_set_audio_htstamp_config(snd_pcm_status_t *obj,
1008 snd_pcm_audio_tstamp_config_t *audio_tstamp_config);
1010 static inline void snd_pcm_pack_audio_tstamp_config(unsigned int *data,
1011 snd_pcm_audio_tstamp_config_t *config)
1013 *data = config->report_delay;
1015 *data |= config->type_requested;
1018 static inline void snd_pcm_unpack_audio_tstamp_report(unsigned int data, unsigned int accuracy,
1019 snd_pcm_audio_tstamp_report_t *report)
1022 report->valid = data & 1;
1023 report->actual_type = (data >> 1) & 0xF;
1024 report->accuracy_report = (data >> 5) & 1;
1025 report->accuracy = accuracy;
1028 snd_pcm_sframes_t snd_pcm_status_get_delay(const snd_pcm_status_t *obj);
1029 snd_pcm_uframes_t snd_pcm_status_get_avail(const snd_pcm_status_t *obj);
1030 snd_pcm_uframes_t snd_pcm_status_get_avail_max(const snd_pcm_status_t *obj);
1031 snd_pcm_uframes_t snd_pcm_status_get_overrange(const snd_pcm_status_t *obj);
1036 * \defgroup PCM_Description Description Functions
1038 * See the \ref pcm page for more details.
1042 const char *snd_pcm_type_name(snd_pcm_type_t type);
1043 const char *snd_pcm_stream_name(const snd_pcm_stream_t stream);
1044 const char *snd_pcm_access_name(const snd_pcm_access_t _access);
1045 const char *snd_pcm_format_name(const snd_pcm_format_t format);
1046 const char *snd_pcm_format_description(const snd_pcm_format_t format);
1047 const char *snd_pcm_subformat_name(const snd_pcm_subformat_t subformat);
1048 const char *snd_pcm_subformat_description(const snd_pcm_subformat_t subformat);
1049 snd_pcm_format_t snd_pcm_format_value(const char* name);
1050 const char *snd_pcm_tstamp_mode_name(const snd_pcm_tstamp_t mode);
1051 const char *snd_pcm_state_name(const snd_pcm_state_t state);
1056 * \defgroup PCM_Dump Debug Functions
1058 * See the \ref pcm page for more details.
1062 int snd_pcm_dump(snd_pcm_t *pcm, snd_output_t *out);
1063 int snd_pcm_dump_hw_setup(snd_pcm_t *pcm, snd_output_t *out);
1064 int snd_pcm_dump_sw_setup(snd_pcm_t *pcm, snd_output_t *out);
1065 int snd_pcm_dump_setup(snd_pcm_t *pcm, snd_output_t *out);
1066 int snd_pcm_hw_params_dump(snd_pcm_hw_params_t *params, snd_output_t *out);
1067 int snd_pcm_sw_params_dump(snd_pcm_sw_params_t *params, snd_output_t *out);
1068 int snd_pcm_status_dump(snd_pcm_status_t *status, snd_output_t *out);
1073 * \defgroup PCM_Direct Direct Access (MMAP) Functions
1075 * See the \ref pcm page for more details.
1079 int snd_pcm_mmap_begin(snd_pcm_t *pcm,
1080 const snd_pcm_channel_area_t **areas,
1081 snd_pcm_uframes_t *offset,
1082 snd_pcm_uframes_t *frames);
1083 snd_pcm_sframes_t snd_pcm_mmap_commit(snd_pcm_t *pcm,
1084 snd_pcm_uframes_t offset,
1085 snd_pcm_uframes_t frames);
1086 snd_pcm_sframes_t snd_pcm_mmap_writei(snd_pcm_t *pcm, const void *buffer, snd_pcm_uframes_t size);
1087 snd_pcm_sframes_t snd_pcm_mmap_readi(snd_pcm_t *pcm, void *buffer, snd_pcm_uframes_t size);
1088 snd_pcm_sframes_t snd_pcm_mmap_writen(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size);
1089 snd_pcm_sframes_t snd_pcm_mmap_readn(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size);
1094 * \defgroup PCM_Helpers Helper Functions
1096 * See the \ref pcm page for more details.
1100 int snd_pcm_format_signed(snd_pcm_format_t format);
1101 int snd_pcm_format_unsigned(snd_pcm_format_t format);
1102 int snd_pcm_format_linear(snd_pcm_format_t format);
1103 int snd_pcm_format_float(snd_pcm_format_t format);
1104 int snd_pcm_format_little_endian(snd_pcm_format_t format);
1105 int snd_pcm_format_big_endian(snd_pcm_format_t format);
1106 int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
1107 int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
1108 int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
1109 snd_pcm_format_t snd_pcm_build_linear_format(int width, int pwidth, int unsignd, int big_endian);
1110 ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
1111 u_int8_t snd_pcm_format_silence(snd_pcm_format_t format);
1112 u_int16_t snd_pcm_format_silence_16(snd_pcm_format_t format);
1113 u_int32_t snd_pcm_format_silence_32(snd_pcm_format_t format);
1114 u_int64_t snd_pcm_format_silence_64(snd_pcm_format_t format);
1115 int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int samples);
1117 snd_pcm_sframes_t snd_pcm_bytes_to_frames(snd_pcm_t *pcm, ssize_t bytes);
1118 ssize_t snd_pcm_frames_to_bytes(snd_pcm_t *pcm, snd_pcm_sframes_t frames);
1119 long snd_pcm_bytes_to_samples(snd_pcm_t *pcm, ssize_t bytes);
1120 ssize_t snd_pcm_samples_to_bytes(snd_pcm_t *pcm, long samples);
1122 int snd_pcm_area_silence(const snd_pcm_channel_area_t *dst_channel, snd_pcm_uframes_t dst_offset,
1123 unsigned int samples, snd_pcm_format_t format);
1124 int snd_pcm_areas_silence(const snd_pcm_channel_area_t *dst_channels, snd_pcm_uframes_t dst_offset,
1125 unsigned int channels, snd_pcm_uframes_t frames, snd_pcm_format_t format);
1126 int snd_pcm_area_copy(const snd_pcm_channel_area_t *dst_channel, snd_pcm_uframes_t dst_offset,
1127 const snd_pcm_channel_area_t *src_channel, snd_pcm_uframes_t src_offset,
1128 unsigned int samples, snd_pcm_format_t format);
1129 int snd_pcm_areas_copy(const snd_pcm_channel_area_t *dst_channels, snd_pcm_uframes_t dst_offset,
1130 const snd_pcm_channel_area_t *src_channels, snd_pcm_uframes_t src_offset,
1131 unsigned int channels, snd_pcm_uframes_t frames, snd_pcm_format_t format);
1136 * \defgroup PCM_Hook Hook Extension
1138 * See the \ref pcm page for more details.
1142 /** type of pcm hook */
1143 typedef enum _snd_pcm_hook_type {
1144 SND_PCM_HOOK_TYPE_HW_PARAMS = 0,
1145 SND_PCM_HOOK_TYPE_HW_FREE,
1146 SND_PCM_HOOK_TYPE_CLOSE,
1147 SND_PCM_HOOK_TYPE_LAST = SND_PCM_HOOK_TYPE_CLOSE
1148 } snd_pcm_hook_type_t;
1150 /** PCM hook container */
1151 typedef struct _snd_pcm_hook snd_pcm_hook_t;
1152 /** PCM hook callback function */
1153 typedef int (*snd_pcm_hook_func_t)(snd_pcm_hook_t *hook);
1154 snd_pcm_t *snd_pcm_hook_get_pcm(snd_pcm_hook_t *hook);
1155 void *snd_pcm_hook_get_private(snd_pcm_hook_t *hook);
1156 void snd_pcm_hook_set_private(snd_pcm_hook_t *hook, void *private_data);
1157 int snd_pcm_hook_add(snd_pcm_hook_t **hookp, snd_pcm_t *pcm,
1158 snd_pcm_hook_type_t type,
1159 snd_pcm_hook_func_t func, void *private_data);
1160 int snd_pcm_hook_remove(snd_pcm_hook_t *hook);
1165 * \defgroup PCM_Scope Scope Plugin Extension
1167 * See the \ref pcm page for more details.
1171 /** #SND_PCM_TYPE_METER scope functions */
1172 typedef struct _snd_pcm_scope_ops {
1173 /** \brief Enable and prepare it using current params
1174 * \param scope scope handle
1176 int (*enable)(snd_pcm_scope_t *scope);
1178 * \param scope scope handle
1180 void (*disable)(snd_pcm_scope_t *scope);
1181 /** \brief PCM has been started
1182 * \param scope scope handle
1184 void (*start)(snd_pcm_scope_t *scope);
1185 /** \brief PCM has been stopped
1186 * \param scope scope handle
1188 void (*stop)(snd_pcm_scope_t *scope);
1189 /** \brief New frames are present
1190 * \param scope scope handle
1192 void (*update)(snd_pcm_scope_t *scope);
1193 /** \brief Reset status
1194 * \param scope scope handle
1196 void (*reset)(snd_pcm_scope_t *scope);
1197 /** \brief PCM is closing
1198 * \param scope scope handle
1200 void (*close)(snd_pcm_scope_t *scope);
1201 } snd_pcm_scope_ops_t;
1203 snd_pcm_uframes_t snd_pcm_meter_get_bufsize(snd_pcm_t *pcm);
1204 unsigned int snd_pcm_meter_get_channels(snd_pcm_t *pcm);
1205 unsigned int snd_pcm_meter_get_rate(snd_pcm_t *pcm);
1206 snd_pcm_uframes_t snd_pcm_meter_get_now(snd_pcm_t *pcm);
1207 snd_pcm_uframes_t snd_pcm_meter_get_boundary(snd_pcm_t *pcm);
1208 int snd_pcm_meter_add_scope(snd_pcm_t *pcm, snd_pcm_scope_t *scope);
1209 snd_pcm_scope_t *snd_pcm_meter_search_scope(snd_pcm_t *pcm, const char *name);
1210 int snd_pcm_scope_malloc(snd_pcm_scope_t **ptr);
1211 void snd_pcm_scope_set_ops(snd_pcm_scope_t *scope,
1212 const snd_pcm_scope_ops_t *val);
1213 void snd_pcm_scope_set_name(snd_pcm_scope_t *scope, const char *val);
1214 const char *snd_pcm_scope_get_name(snd_pcm_scope_t *scope);
1215 void *snd_pcm_scope_get_callback_private(snd_pcm_scope_t *scope);
1216 void snd_pcm_scope_set_callback_private(snd_pcm_scope_t *scope, void *val);
1217 int snd_pcm_scope_s16_open(snd_pcm_t *pcm, const char *name,
1218 snd_pcm_scope_t **scopep);
1219 int16_t *snd_pcm_scope_s16_get_channel_buffer(snd_pcm_scope_t *scope,
1220 unsigned int channel);
1225 * \defgroup PCM_Simple Simple setup functions
1227 * See the \ref pcm page for more details.
1231 /** Simple PCM latency type */
1232 typedef enum _snd_spcm_latency {
1233 /** standard latency - for standard playback or capture
1234 (estimated latency in one direction 350ms) */
1235 SND_SPCM_LATENCY_STANDARD = 0,
1236 /** medium latency - software phones etc.
1237 (estimated latency in one direction maximally 25ms */
1238 SND_SPCM_LATENCY_MEDIUM,
1239 /** realtime latency - realtime applications (effect processors etc.)
1240 (estimated latency in one direction 5ms and better) */
1241 SND_SPCM_LATENCY_REALTIME
1242 } snd_spcm_latency_t;
1244 /** Simple PCM xrun type */
1245 typedef enum _snd_spcm_xrun_type {
1246 /** driver / library will ignore all xruns, the stream runs forever */
1247 SND_SPCM_XRUN_IGNORE = 0,
1248 /** driver / library stops the stream when an xrun occurs */
1250 } snd_spcm_xrun_type_t;
1252 /** Simple PCM duplex type */
1253 typedef enum _snd_spcm_duplex_type {
1254 /** liberal duplex - the buffer and period sizes might not match */
1255 SND_SPCM_DUPLEX_LIBERAL = 0,
1256 /** pedantic duplex - the buffer and period sizes MUST match */
1257 SND_SPCM_DUPLEX_PEDANTIC
1258 } snd_spcm_duplex_type_t;
1260 int snd_spcm_init(snd_pcm_t *pcm,
1262 unsigned int channels,
1263 snd_pcm_format_t format,
1264 snd_pcm_subformat_t subformat,
1265 snd_spcm_latency_t latency,
1266 snd_pcm_access_t _access,
1267 snd_spcm_xrun_type_t xrun_type);
1269 int snd_spcm_init_duplex(snd_pcm_t *playback_pcm,
1270 snd_pcm_t *capture_pcm,
1272 unsigned int channels,
1273 snd_pcm_format_t format,
1274 snd_pcm_subformat_t subformat,
1275 snd_spcm_latency_t latency,
1276 snd_pcm_access_t _access,
1277 snd_spcm_xrun_type_t xrun_type,
1278 snd_spcm_duplex_type_t duplex_type);
1280 int snd_spcm_init_get_params(snd_pcm_t *pcm,
1282 snd_pcm_uframes_t *buffer_size,
1283 snd_pcm_uframes_t *period_size);
1288 * \defgroup PCM_Deprecated Deprecated Functions
1290 * See the \ref pcm page for more details.
1294 /* Deprecated functions, for compatibility */
1295 const char *snd_pcm_start_mode_name(snd_pcm_start_t mode) __attribute__((deprecated));
1296 const char *snd_pcm_xrun_mode_name(snd_pcm_xrun_t mode) __attribute__((deprecated));
1297 int snd_pcm_sw_params_set_start_mode(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_start_t val) __attribute__((deprecated));
1298 snd_pcm_start_t snd_pcm_sw_params_get_start_mode(const snd_pcm_sw_params_t *params) __attribute__((deprecated));
1299 int snd_pcm_sw_params_set_xrun_mode(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_xrun_t val) __attribute__((deprecated));
1300 snd_pcm_xrun_t snd_pcm_sw_params_get_xrun_mode(const snd_pcm_sw_params_t *params) __attribute__((deprecated));
1301 #if !defined(ALSA_LIBRARY_BUILD) && !defined(ALSA_PCM_OLD_SW_PARAMS_API)
1302 int snd_pcm_sw_params_set_xfer_align(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val) __attribute__((deprecated));
1303 int snd_pcm_sw_params_get_xfer_align(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val) __attribute__((deprecated));
1304 int snd_pcm_sw_params_set_sleep_min(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, unsigned int val) __attribute__((deprecated));
1305 int snd_pcm_sw_params_get_sleep_min(const snd_pcm_sw_params_t *params, unsigned int *val) __attribute__((deprecated));
1306 #endif /* !ALSA_LIBRARY_BUILD && !ALSA_PCM_OLD_SW_PARAMS_API */
1307 #if !defined(ALSA_LIBRARY_BUILD) && !defined(ALSA_PCM_OLD_HW_PARAMS_API)
1308 int snd_pcm_hw_params_get_tick_time(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated));
1309 int snd_pcm_hw_params_get_tick_time_min(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated));
1310 int snd_pcm_hw_params_get_tick_time_max(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated));
1311 int snd_pcm_hw_params_test_tick_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir) __attribute__((deprecated));
1312 int snd_pcm_hw_params_set_tick_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir) __attribute__((deprecated));
1313 int snd_pcm_hw_params_set_tick_time_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated));
1314 int snd_pcm_hw_params_set_tick_time_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated));
1315 int snd_pcm_hw_params_set_tick_time_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir) __attribute__((deprecated));
1316 int snd_pcm_hw_params_set_tick_time_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated));
1317 int snd_pcm_hw_params_set_tick_time_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated));
1318 int snd_pcm_hw_params_set_tick_time_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir) __attribute__((deprecated));
1319 #endif /* !ALSA_LIBRARY_BUILD && !ALSA_PCM_OLD_HW_PARAMS_API */
1327 #endif /* __ALSA_PCM_H */