2 * OpenAL cross platform audio library
3 * Copyright (C) 1999-2007 by authors.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
18 * Or go to http://www.gnu.org/copyleft/lgpl.html
33 #include <alsa/asoundlib.h>
38 snd_pcm_format_t format
;
55 static void *alsa_handle
;
56 #define MAKE_FUNC(f) static typeof(f) * p##f
57 MAKE_FUNC(snd_strerror
);
58 MAKE_FUNC(snd_pcm_open
);
59 MAKE_FUNC(snd_pcm_close
);
60 MAKE_FUNC(snd_pcm_nonblock
);
61 MAKE_FUNC(snd_pcm_frames_to_bytes
);
62 MAKE_FUNC(snd_pcm_hw_params_malloc
);
63 MAKE_FUNC(snd_pcm_hw_params_free
);
64 MAKE_FUNC(snd_pcm_hw_params_any
);
65 MAKE_FUNC(snd_pcm_hw_params_set_access
);
66 MAKE_FUNC(snd_pcm_hw_params_set_format
);
67 MAKE_FUNC(snd_pcm_hw_params_set_channels
);
68 MAKE_FUNC(snd_pcm_hw_params_set_periods_near
);
69 MAKE_FUNC(snd_pcm_hw_params_set_rate_near
);
70 MAKE_FUNC(snd_pcm_hw_params_set_rate
);
71 MAKE_FUNC(snd_pcm_hw_params_set_buffer_size_near
);
72 MAKE_FUNC(snd_pcm_hw_params_set_buffer_size_min
);
73 MAKE_FUNC(snd_pcm_hw_params_get_buffer_size
);
74 MAKE_FUNC(snd_pcm_hw_params_get_period_size
);
75 MAKE_FUNC(snd_pcm_hw_params_get_access
);
76 MAKE_FUNC(snd_pcm_hw_params
);
77 MAKE_FUNC(snd_pcm_sw_params_malloc
);
78 MAKE_FUNC(snd_pcm_sw_params_current
);
79 MAKE_FUNC(snd_pcm_sw_params_set_avail_min
);
80 MAKE_FUNC(snd_pcm_sw_params
);
81 MAKE_FUNC(snd_pcm_sw_params_free
);
82 MAKE_FUNC(snd_pcm_prepare
);
83 MAKE_FUNC(snd_pcm_start
);
84 MAKE_FUNC(snd_pcm_resume
);
85 MAKE_FUNC(snd_pcm_wait
);
86 MAKE_FUNC(snd_pcm_state
);
87 MAKE_FUNC(snd_pcm_avail_update
);
88 MAKE_FUNC(snd_pcm_areas_silence
);
89 MAKE_FUNC(snd_pcm_mmap_begin
);
90 MAKE_FUNC(snd_pcm_mmap_commit
);
91 MAKE_FUNC(snd_pcm_readi
);
92 MAKE_FUNC(snd_pcm_writei
);
93 MAKE_FUNC(snd_pcm_drain
);
94 MAKE_FUNC(snd_pcm_info_malloc
);
95 MAKE_FUNC(snd_pcm_info_free
);
96 MAKE_FUNC(snd_pcm_info_set_device
);
97 MAKE_FUNC(snd_pcm_info_set_subdevice
);
98 MAKE_FUNC(snd_pcm_info_set_stream
);
99 MAKE_FUNC(snd_pcm_info_get_name
);
100 MAKE_FUNC(snd_ctl_pcm_next_device
);
101 MAKE_FUNC(snd_ctl_pcm_info
);
102 MAKE_FUNC(snd_ctl_open
);
103 MAKE_FUNC(snd_ctl_close
);
104 MAKE_FUNC(snd_ctl_card_info_malloc
);
105 MAKE_FUNC(snd_ctl_card_info_free
);
106 MAKE_FUNC(snd_ctl_card_info
);
107 MAKE_FUNC(snd_ctl_card_info_get_name
);
108 MAKE_FUNC(snd_card_next
);
111 #define MAX_ALL_DEVICES 32
113 static ALCchar
*alsaDevice
;
114 static DevMap allDevNameMap
[MAX_ALL_DEVICES
];
115 static DevMap allCaptureDevNameMap
[MAX_ALL_DEVICES
];
117 static int xrun_recovery(snd_pcm_t
*handle
, int err
)
121 err
= psnd_pcm_prepare(handle
);
123 AL_PRINT("prepare failed: %s\n", psnd_strerror(err
));
125 else if (err
== -ESTRPIPE
)
127 while ((err
= psnd_pcm_resume(handle
)) == -EAGAIN
)
128 Sleep(1); /* wait until the suspend flag is released */
131 err
= psnd_pcm_prepare(handle
);
133 AL_PRINT("prepare failed: %s\n", psnd_strerror(err
));
140 static ALuint
ALSAProc(ALvoid
*ptr
)
142 ALCdevice
*pDevice
= (ALCdevice
*)ptr
;
143 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
144 const snd_pcm_channel_area_t
*areas
= NULL
;
145 snd_pcm_sframes_t avail
, commitres
;
146 snd_pcm_uframes_t offset
, frames
;
151 while(!data
->killNow
)
153 snd_pcm_state_t state
= psnd_pcm_state(data
->pcmHandle
);
154 if(state
== SND_PCM_STATE_XRUN
)
156 err
= xrun_recovery(data
->pcmHandle
, -EPIPE
);
159 AL_PRINT("XRUN recovery failed: %s\n", psnd_strerror(err
));
163 else if (state
== SND_PCM_STATE_SUSPENDED
)
165 err
= xrun_recovery(data
->pcmHandle
, -ESTRPIPE
);
168 AL_PRINT("SUSPEND recovery failed: %s\n", psnd_strerror(err
));
173 avail
= psnd_pcm_avail_update(data
->pcmHandle
);
176 err
= xrun_recovery(data
->pcmHandle
, avail
);
179 AL_PRINT("available update failed: %s\n", psnd_strerror(err
));
184 // make sure there's frames to process
185 if(avail
>= 0 && avail
< (snd_pcm_sframes_t
)pDevice
->UpdateSize
)
187 if(state
!= SND_PCM_STATE_RUNNING
)
189 err
= psnd_pcm_start(data
->pcmHandle
);
191 err
= xrun_recovery(data
->pcmHandle
, err
);
194 AL_PRINT("start failed: %s\n", psnd_strerror(err
));
198 else if(psnd_pcm_wait(data
->pcmHandle
, 1000) == 0)
199 AL_PRINT("Wait timeout... buffer size too low?\n");
202 avail
= pDevice
->UpdateSize
;
204 // it is possible that contiguous areas are smaller, thus we use a loop
209 SuspendContext(NULL
);
210 err
= psnd_pcm_mmap_begin(data
->pcmHandle
, &areas
, &offset
, &frames
);
213 err
= xrun_recovery(data
->pcmHandle
, err
);
215 AL_PRINT("mmap begin error: %s\n", psnd_strerror(err
));
216 ProcessContext(NULL
);
220 WritePtr
= (char*)areas
->addr
+ (offset
* areas
->step
/ 8);
221 WriteCnt
= psnd_pcm_frames_to_bytes(data
->pcmHandle
, frames
);
222 aluMixData(pDevice
->Context
, WritePtr
, WriteCnt
, pDevice
->Format
);
224 commitres
= psnd_pcm_mmap_commit(data
->pcmHandle
, offset
, frames
);
225 if (commitres
< 0 || (commitres
-frames
) != 0)
227 AL_PRINT("mmap commit error: %s\n",
228 psnd_strerror(commitres
>= 0 ? -EPIPE
: commitres
));
229 ProcessContext(NULL
);
232 ProcessContext(NULL
);
241 static ALuint
ALSANoMMapProc(ALvoid
*ptr
)
243 ALCdevice
*pDevice
= (ALCdevice
*)ptr
;
244 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
245 snd_pcm_sframes_t avail
;
248 while(!data
->killNow
)
250 SuspendContext(NULL
);
251 aluMixData(pDevice
->Context
, data
->buffer
, data
->size
, pDevice
->Format
);
252 ProcessContext(NULL
);
254 WritePtr
= data
->buffer
;
255 avail
= (snd_pcm_uframes_t
)data
->size
/ psnd_pcm_frames_to_bytes(data
->pcmHandle
, 1);
258 int ret
= psnd_pcm_writei(data
->pcmHandle
, WritePtr
, avail
);
264 while((ret
=psnd_pcm_resume(data
->pcmHandle
)) == -EAGAIN
)
272 WritePtr
+= psnd_pcm_frames_to_bytes(data
->pcmHandle
, ret
);
279 ret
= psnd_pcm_prepare(data
->pcmHandle
);
289 static ALuint
ALSANoMMapCaptureProc(ALvoid
*ptr
)
291 ALCdevice
*pDevice
= (ALCdevice
*)ptr
;
292 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
293 snd_pcm_sframes_t avail
;
295 while(!data
->killNow
)
297 avail
= (snd_pcm_uframes_t
)data
->size
/ psnd_pcm_frames_to_bytes(data
->pcmHandle
, 1);
298 avail
= psnd_pcm_readi(data
->pcmHandle
, data
->buffer
, avail
);
304 while((avail
=psnd_pcm_resume(data
->pcmHandle
)) == -EAGAIN
)
310 if (avail
>= 0 && data
->doCapture
)
311 WriteRingBuffer(data
->ring
, data
->buffer
, avail
);
316 avail
= psnd_pcm_prepare(data
->pcmHandle
);
318 AL_PRINT("prepare error: %s\n", psnd_strerror(avail
));
325 static ALCboolean
alsa_open_playback(ALCdevice
*device
, const ALCchar
*deviceName
)
334 strncpy(driver
, GetConfigValue("alsa", "device", "default"), sizeof(driver
)-1);
335 driver
[sizeof(driver
)-1] = 0;
340 for(idx
= 0;idx
< MAX_ALL_DEVICES
;idx
++)
342 if(allDevNameMap
[idx
].name
&&
343 strcmp(deviceName
, allDevNameMap
[idx
].name
) == 0)
345 device
->szDeviceName
= allDevNameMap
[idx
].name
;
347 sprintf(driver
, "hw:%d,%d", allDevNameMap
[idx
].card
, allDevNameMap
[idx
].dev
);
351 if(strcmp(deviceName
, alsaDevice
) == 0)
353 device
->szDeviceName
= alsaDevice
;
359 device
->szDeviceName
= alsaDevice
;
362 data
= (alsa_data
*)calloc(1, sizeof(alsa_data
));
364 i
= psnd_pcm_open(&data
->pcmHandle
, driver
, SND_PCM_STREAM_PLAYBACK
, SND_PCM_NONBLOCK
);
368 i
= psnd_pcm_open(&data
->pcmHandle
, driver
, SND_PCM_STREAM_PLAYBACK
, SND_PCM_NONBLOCK
);
372 i
= psnd_pcm_nonblock(data
->pcmHandle
, 0);
374 psnd_pcm_close(data
->pcmHandle
);
379 AL_PRINT("Could not open playback device '%s': %s\n", driver
, psnd_strerror(i
));
383 device
->ExtraData
= data
;
387 static void alsa_close_playback(ALCdevice
*device
)
389 alsa_data
*data
= (alsa_data
*)device
->ExtraData
;
391 psnd_pcm_close(data
->pcmHandle
);
393 device
->ExtraData
= NULL
;
396 static ALCboolean
alsa_start_context(ALCdevice
*device
, ALCcontext
*context
)
398 alsa_data
*data
= (alsa_data
*)device
->ExtraData
;
399 snd_pcm_uframes_t bufferSizeInFrames
;
400 snd_pcm_sw_params_t
*sp
= NULL
;
401 snd_pcm_hw_params_t
*p
= NULL
;
402 snd_pcm_access_t access
;
403 unsigned int periods
;
412 switch(aluBytesFromFormat(device
->Format
))
415 data
->format
= SND_PCM_FORMAT_U8
;
418 data
->format
= SND_PCM_FORMAT_S16
;
421 data
->format
= SND_PCM_FORMAT_UNKNOWN
;
422 AL_PRINT("Unknown format?! %x\n", device
->Format
);
425 periods
= GetConfigValueInt("alsa", "periods", 0);
426 bufferSizeInFrames
= device
->BufferSize
;
427 rate
= device
->Frequency
;
429 str
= GetConfigValue("alsa", "mmap", "true");
430 allowmmap
= (strcasecmp(str
, "true") == 0 ||
431 strcasecmp(str
, "yes") == 0 ||
432 strcasecmp(str
, "on") == 0 ||
436 psnd_pcm_hw_params_malloc(&p
);
438 if((i
=psnd_pcm_hw_params_any(data
->pcmHandle
, p
)) < 0)
440 /* set interleaved access */
441 if(err
== NULL
&& (!allowmmap
|| (i
=psnd_pcm_hw_params_set_access(data
->pcmHandle
, p
, SND_PCM_ACCESS_MMAP_INTERLEAVED
)) < 0))
443 if((i
=psnd_pcm_hw_params_set_access(data
->pcmHandle
, p
, SND_PCM_ACCESS_RW_INTERLEAVED
)) < 0)
446 /* set format (implicitly sets sample bits) */
447 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_format(data
->pcmHandle
, p
, data
->format
)) < 0)
449 /* set channels (implicitly sets frame bits) */
450 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_channels(data
->pcmHandle
, p
, aluChannelsFromFormat(device
->Format
))) < 0)
451 err
= "set channels";
452 /* set periods (implicitly constrains period/buffer parameters) */
453 if(err
== NULL
&& periods
&& (i
=psnd_pcm_hw_params_set_periods_near(data
->pcmHandle
, p
, &periods
, NULL
)) < 0)
454 err
= "set periods near";
455 /* set rate (implicitly constrains period/buffer parameters) */
456 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_rate_near(data
->pcmHandle
, p
, &rate
, NULL
)) < 0)
457 err
= "set rate near";
458 /* set buffer size in frame units (implicitly sets period size/bytes/time and buffer time/bytes) */
459 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_buffer_size_near(data
->pcmHandle
, p
, &bufferSizeInFrames
)) < 0)
460 err
= "set buffer size near";
461 /* install and prepare hardware configuration */
462 if(err
== NULL
&& (i
=psnd_pcm_hw_params(data
->pcmHandle
, p
)) < 0)
464 if(err
== NULL
&& (i
=psnd_pcm_hw_params_get_access(p
, &access
)) < 0)
466 if(err
== NULL
&& (i
=psnd_pcm_hw_params_get_period_size(p
, &bufferSizeInFrames
, NULL
)) < 0)
467 err
= "get period size";
470 AL_PRINT("%s failed: %s\n", err
, psnd_strerror(i
));
471 psnd_pcm_hw_params_free(p
);
475 psnd_pcm_hw_params_free(p
);
478 psnd_pcm_sw_params_malloc(&sp
);
480 if((i
=psnd_pcm_sw_params_current(data
->pcmHandle
, sp
)) != 0)
482 if(err
== NULL
&& (i
=psnd_pcm_sw_params_set_avail_min(data
->pcmHandle
, sp
, bufferSizeInFrames
)) != 0)
483 err
= "sw set avail min";
484 if(err
== NULL
&& (i
=psnd_pcm_sw_params(data
->pcmHandle
, sp
)) != 0)
485 err
= "sw set params";
488 AL_PRINT("%s failed: %s\n", err
, psnd_strerror(i
));
489 psnd_pcm_sw_params_free(sp
);
493 psnd_pcm_sw_params_free(sp
);
495 data
->size
= psnd_pcm_frames_to_bytes(data
->pcmHandle
, bufferSizeInFrames
);
496 if(access
== SND_PCM_ACCESS_RW_INTERLEAVED
)
498 data
->buffer
= malloc(data
->size
);
501 AL_PRINT("buffer malloc failed\n");
507 i
= psnd_pcm_prepare(data
->pcmHandle
);
510 AL_PRINT("prepare error: %s\n", psnd_strerror(i
));
517 if(access
== SND_PCM_ACCESS_RW_INTERLEAVED
)
518 data
->thread
= StartThread(ALSANoMMapProc
, device
);
520 data
->thread
= StartThread(ALSAProc
, device
);
521 if(data
->thread
== NULL
)
523 AL_PRINT("Could not create playback thread\n");
529 device
->UpdateSize
= bufferSizeInFrames
;
530 device
->Frequency
= rate
;
535 static void alsa_stop_context(ALCdevice
*device
, ALCcontext
*context
)
537 alsa_data
*data
= (alsa_data
*)device
->ExtraData
;
544 StopThread(data
->thread
);
552 static ALCboolean
alsa_open_capture(ALCdevice
*pDevice
, const ALCchar
*deviceName
)
554 snd_pcm_hw_params_t
*p
;
555 snd_pcm_uframes_t bufferSizeInFrames
;
556 snd_pcm_access_t access
;
567 strncpy(driver
, GetConfigValue("alsa", "capture", "default"), sizeof(driver
)-1);
568 driver
[sizeof(driver
)-1] = 0;
573 for(idx
= 0;idx
< MAX_ALL_DEVICES
;idx
++)
575 if(allCaptureDevNameMap
[idx
].name
&&
576 strcmp(deviceName
, allCaptureDevNameMap
[idx
].name
) == 0)
578 pDevice
->szDeviceName
= allCaptureDevNameMap
[idx
].name
;
580 sprintf(driver
, "plughw:%d,%d", allCaptureDevNameMap
[idx
].card
, allCaptureDevNameMap
[idx
].dev
);
587 pDevice
->szDeviceName
= allCaptureDevNameMap
[0].name
;
590 data
= (alsa_data
*)calloc(1, sizeof(alsa_data
));
592 i
= psnd_pcm_open(&data
->pcmHandle
, driver
, SND_PCM_STREAM_CAPTURE
, SND_PCM_NONBLOCK
);
596 i
= psnd_pcm_open(&data
->pcmHandle
, driver
, SND_PCM_STREAM_CAPTURE
, SND_PCM_NONBLOCK
);
600 i
= psnd_pcm_nonblock(data
->pcmHandle
, 0);
602 psnd_pcm_close(data
->pcmHandle
);
607 AL_PRINT("Could not open capture device '%s': %s\n", driver
, psnd_strerror(i
));
611 switch(aluBytesFromFormat(pDevice
->Format
))
614 data
->format
= SND_PCM_FORMAT_U8
;
617 data
->format
= SND_PCM_FORMAT_S16
;
620 data
->format
= SND_PCM_FORMAT_UNKNOWN
;
621 AL_PRINT("Unknown format?! %x\n", pDevice
->Format
);
624 str
= GetConfigValue("alsa", "mmap", "true");
625 allowmmap
= (strcasecmp(str
, "true") == 0 ||
626 strcasecmp(str
, "yes") == 0 ||
627 strcasecmp(str
, "on") == 0 ||
631 bufferSizeInFrames
= pDevice
->BufferSize
;
632 psnd_pcm_hw_params_malloc(&p
);
636 if((i
=psnd_pcm_hw_params_any(data
->pcmHandle
, p
)) < 0)
638 /* set interleaved access */
639 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_access(data
->pcmHandle
, p
, SND_PCM_ACCESS_MMAP_INTERLEAVED
)) < 0)
644 /* set format (implicitly sets sample bits) */
645 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_format(data
->pcmHandle
, p
, data
->format
)) < 0)
647 /* set channels (implicitly sets frame bits) */
648 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_channels(data
->pcmHandle
, p
, aluChannelsFromFormat(pDevice
->Format
))) < 0)
649 err
= "set channels";
650 /* set rate (implicitly constrains period/buffer parameters) */
651 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_rate(data
->pcmHandle
, p
, pDevice
->Frequency
, 0)) < 0)
652 err
= "set rate near";
653 /* set buffer size in frame units (implicitly sets period size/bytes/time and buffer time/bytes) */
654 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_buffer_size_min(data
->pcmHandle
, p
, &bufferSizeInFrames
)) < 0)
656 err
= "set buffer size min";
659 /* install and prepare hardware configuration */
660 if(err
== NULL
&& (i
=psnd_pcm_hw_params(data
->pcmHandle
, p
)) < 0)
665 if((i
=psnd_pcm_hw_params_any(data
->pcmHandle
, p
)) < 0)
667 /* set interleaved access */
668 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_access(data
->pcmHandle
, p
, SND_PCM_ACCESS_RW_INTERLEAVED
)) < 0)
670 /* set format (implicitly sets sample bits) */
671 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_format(data
->pcmHandle
, p
, data
->format
)) < 0)
673 /* set channels (implicitly sets frame bits) */
674 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_channels(data
->pcmHandle
, p
, aluChannelsFromFormat(pDevice
->Format
))) < 0)
675 err
= "set channels";
676 /* set rate (implicitly constrains period/buffer parameters) */
677 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_rate(data
->pcmHandle
, p
, pDevice
->Frequency
, 0)) < 0)
678 err
= "set rate near";
679 /* set buffer size in frame units (implicitly sets period size/bytes/time and buffer time/bytes) */
680 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_buffer_size_near(data
->pcmHandle
, p
, &bufferSizeInFrames
)) < 0)
681 err
= "set buffer size near";
682 /* install and prepare hardware configuration */
683 if(err
== NULL
&& (i
=psnd_pcm_hw_params(data
->pcmHandle
, p
)) < 0)
688 AL_PRINT("%s failed: %s\n", err
, psnd_strerror(i
));
689 psnd_pcm_hw_params_free(p
);
690 psnd_pcm_close(data
->pcmHandle
);
695 if((i
=psnd_pcm_hw_params_get_access(p
, &access
)) < 0)
697 AL_PRINT("get_access failed: %s\n", psnd_strerror(i
));
698 psnd_pcm_hw_params_free(p
);
699 psnd_pcm_close(data
->pcmHandle
);
703 if((i
=psnd_pcm_hw_params_get_period_size(p
, &bufferSizeInFrames
, NULL
)) < 0)
705 AL_PRINT("get size failed: %s\n", psnd_strerror(i
));
706 psnd_pcm_hw_params_free(p
);
707 psnd_pcm_close(data
->pcmHandle
);
712 psnd_pcm_hw_params_free(p
);
714 if(access
== SND_PCM_ACCESS_RW_INTERLEAVED
)
716 ALuint frameSize
= aluChannelsFromFormat(pDevice
->Format
);
717 frameSize
*= aluBytesFromFormat(pDevice
->Format
);
719 data
->ring
= CreateRingBuffer(frameSize
, pDevice
->BufferSize
);
722 AL_PRINT("ring buffer create failed\n");
723 psnd_pcm_close(data
->pcmHandle
);
728 data
->size
= psnd_pcm_frames_to_bytes(data
->pcmHandle
, bufferSizeInFrames
);
729 data
->buffer
= malloc(data
->size
);
732 AL_PRINT("buffer malloc failed\n");
733 psnd_pcm_close(data
->pcmHandle
);
734 DestroyRingBuffer(data
->ring
);
739 pDevice
->ExtraData
= data
;
740 data
->thread
= StartThread(ALSANoMMapCaptureProc
, pDevice
);
741 if(data
->thread
== NULL
)
743 AL_PRINT("Could not create capture thread\n");
744 pDevice
->ExtraData
= NULL
;
745 psnd_pcm_close(data
->pcmHandle
);
746 DestroyRingBuffer(data
->ring
);
754 i
= psnd_pcm_prepare(data
->pcmHandle
);
757 AL_PRINT("prepare error: %s\n", psnd_strerror(i
));
758 psnd_pcm_close(data
->pcmHandle
);
762 pDevice
->ExtraData
= data
;
768 static void alsa_close_capture(ALCdevice
*pDevice
)
770 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
775 StopThread(data
->thread
);
776 DestroyRingBuffer(data
->ring
);
778 psnd_pcm_close(data
->pcmHandle
);
781 pDevice
->ExtraData
= NULL
;
784 static void alsa_start_capture(ALCdevice
*pDevice
)
786 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
790 psnd_pcm_prepare(data
->pcmHandle
);
791 psnd_pcm_start(data
->pcmHandle
);
795 static void alsa_stop_capture(ALCdevice
*pDevice
)
797 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
800 psnd_pcm_drain(data
->pcmHandle
);
803 static void alsa_capture_samples(ALCdevice
*pDevice
, ALCvoid
*pBuffer
, ALCuint lSamples
)
805 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
806 const snd_pcm_channel_area_t
*areas
= NULL
;
807 snd_pcm_sframes_t frames
, commitres
;
808 snd_pcm_uframes_t size
, offset
;
809 snd_pcm_state_t state
;
814 if(lSamples
<= (ALCuint
)RingBufferSize(data
->ring
))
815 ReadRingBuffer(data
->ring
, pBuffer
, lSamples
);
817 SetALCError(ALC_INVALID_VALUE
);
821 state
= psnd_pcm_state(data
->pcmHandle
);
822 if(state
== SND_PCM_STATE_XRUN
)
824 err
= xrun_recovery(data
->pcmHandle
, -EPIPE
);
827 AL_PRINT("XRUN recovery failed: %s\n", psnd_strerror(err
));
832 frames
= psnd_pcm_avail_update(data
->pcmHandle
);
835 err
= xrun_recovery(data
->pcmHandle
, frames
);
837 AL_PRINT("available update failed: %s\n", psnd_strerror(err
));
839 frames
= psnd_pcm_avail_update(data
->pcmHandle
);
841 if (frames
< (snd_pcm_sframes_t
)lSamples
)
843 SetALCError(ALC_INVALID_VALUE
);
847 // it is possible that contiguous areas are smaller, thus we use a loop
854 err
= psnd_pcm_mmap_begin(data
->pcmHandle
, &areas
, &offset
, &size
);
857 err
= xrun_recovery(data
->pcmHandle
, err
);
860 AL_PRINT("mmap begin error: %s\n", psnd_strerror(err
));
866 Pointer
= (char*)areas
->addr
+ (offset
* areas
->step
/ 8);
867 Count
= psnd_pcm_frames_to_bytes(data
->pcmHandle
, size
);
869 memcpy(pBuffer
, Pointer
, Count
);
870 pBuffer
= (char*)pBuffer
+ Count
;
872 commitres
= psnd_pcm_mmap_commit(data
->pcmHandle
, offset
, size
);
873 if (commitres
< 0 || (commitres
-size
) != 0)
875 AL_PRINT("mmap commit error: %s\n",
876 psnd_strerror(commitres
>= 0 ? -EPIPE
: commitres
));
884 static ALCuint
alsa_available_samples(ALCdevice
*pDevice
)
886 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
887 snd_pcm_sframes_t frames
;
888 snd_pcm_state_t state
;
892 return RingBufferSize(data
->ring
);
894 state
= psnd_pcm_state(data
->pcmHandle
);
895 if(state
== SND_PCM_STATE_XRUN
)
897 err
= xrun_recovery(data
->pcmHandle
, -EPIPE
);
901 err
= psnd_pcm_start(data
->pcmHandle
);
905 AL_PRINT("XRUN recovery failed: %s\n", psnd_strerror(err
));
910 frames
= psnd_pcm_avail_update(data
->pcmHandle
);
913 err
= xrun_recovery(data
->pcmHandle
, frames
);
915 AL_PRINT("available update failed: %s\n", psnd_strerror(err
));
917 frames
= psnd_pcm_avail_update(data
->pcmHandle
);
919 return max(frames
, 0);
923 BackendFuncs alsa_funcs
= {
932 alsa_capture_samples
,
933 alsa_available_samples
936 void alc_alsa_init(BackendFuncs
*func_list
)
939 int card
, err
, dev
, idx
= 1;
940 snd_ctl_card_info_t
*info
;
941 snd_pcm_info_t
*pcminfo
;
942 snd_pcm_stream_t stream
= SND_PCM_STREAM_PLAYBACK
;
946 *func_list
= alsa_funcs
;
949 alsa_handle
= dlopen("libasound.so.2", RTLD_NOW
);
954 #define LOAD_FUNC(f) do { \
955 p##f = (typeof(f)*)dlsym(alsa_handle, #f); \
956 if((str=dlerror()) != NULL) \
958 dlclose(alsa_handle); \
959 alsa_handle = NULL; \
960 AL_PRINT("Could not load %s from libasound.so.2: %s\n", #f, str); \
966 alsa_handle
= (void*)0xDEADBEEF;
967 #define LOAD_FUNC(f) p##f = f
970 LOAD_FUNC(snd_strerror
);
971 LOAD_FUNC(snd_pcm_open
);
972 LOAD_FUNC(snd_pcm_close
);
973 LOAD_FUNC(snd_pcm_nonblock
);
974 LOAD_FUNC(snd_pcm_frames_to_bytes
);
975 LOAD_FUNC(snd_pcm_hw_params_malloc
);
976 LOAD_FUNC(snd_pcm_hw_params_free
);
977 LOAD_FUNC(snd_pcm_hw_params_any
);
978 LOAD_FUNC(snd_pcm_hw_params_set_access
);
979 LOAD_FUNC(snd_pcm_hw_params_set_format
);
980 LOAD_FUNC(snd_pcm_hw_params_set_channels
);
981 LOAD_FUNC(snd_pcm_hw_params_set_periods_near
);
982 LOAD_FUNC(snd_pcm_hw_params_set_rate_near
);
983 LOAD_FUNC(snd_pcm_hw_params_set_rate
);
984 LOAD_FUNC(snd_pcm_hw_params_set_buffer_size_near
);
985 LOAD_FUNC(snd_pcm_hw_params_set_buffer_size_min
);
986 LOAD_FUNC(snd_pcm_hw_params_get_buffer_size
);
987 LOAD_FUNC(snd_pcm_hw_params_get_period_size
);
988 LOAD_FUNC(snd_pcm_hw_params_get_access
);
989 LOAD_FUNC(snd_pcm_hw_params
);
990 LOAD_FUNC(snd_pcm_sw_params_malloc
);
991 LOAD_FUNC(snd_pcm_sw_params_current
);
992 LOAD_FUNC(snd_pcm_sw_params_set_avail_min
);
993 LOAD_FUNC(snd_pcm_sw_params
);
994 LOAD_FUNC(snd_pcm_sw_params_free
);
995 LOAD_FUNC(snd_pcm_prepare
);
996 LOAD_FUNC(snd_pcm_start
);
997 LOAD_FUNC(snd_pcm_resume
);
998 LOAD_FUNC(snd_pcm_wait
);
999 LOAD_FUNC(snd_pcm_state
);
1000 LOAD_FUNC(snd_pcm_avail_update
);
1001 LOAD_FUNC(snd_pcm_areas_silence
);
1002 LOAD_FUNC(snd_pcm_mmap_begin
);
1003 LOAD_FUNC(snd_pcm_mmap_commit
);
1004 LOAD_FUNC(snd_pcm_readi
);
1005 LOAD_FUNC(snd_pcm_writei
);
1006 LOAD_FUNC(snd_pcm_drain
);
1008 LOAD_FUNC(snd_pcm_info_malloc
);
1009 LOAD_FUNC(snd_pcm_info_free
);
1010 LOAD_FUNC(snd_pcm_info_set_device
);
1011 LOAD_FUNC(snd_pcm_info_set_subdevice
);
1012 LOAD_FUNC(snd_pcm_info_set_stream
);
1013 LOAD_FUNC(snd_pcm_info_get_name
);
1014 LOAD_FUNC(snd_ctl_pcm_next_device
);
1015 LOAD_FUNC(snd_ctl_pcm_info
);
1016 LOAD_FUNC(snd_ctl_open
);
1017 LOAD_FUNC(snd_ctl_close
);
1018 LOAD_FUNC(snd_ctl_card_info_malloc
);
1019 LOAD_FUNC(snd_ctl_card_info_free
);
1020 LOAD_FUNC(snd_ctl_card_info
);
1021 LOAD_FUNC(snd_ctl_card_info_get_name
);
1022 LOAD_FUNC(snd_card_next
);
1026 psnd_ctl_card_info_malloc(&info
);
1027 psnd_pcm_info_malloc(&pcminfo
);
1030 if(psnd_card_next(&card
) < 0 || card
< 0)
1031 AL_PRINT("no playback cards found...\n");
1033 alsaDevice
= AppendDeviceList("ALSA Software");
1034 allDevNameMap
[0].name
= AppendAllDeviceList("ALSA Software on default");
1037 sprintf(name
, "hw:%d", card
);
1038 if ((err
= psnd_ctl_open(&handle
, name
, 0)) < 0) {
1039 AL_PRINT("control open (%i): %s\n", card
, psnd_strerror(err
));
1042 if ((err
= psnd_ctl_card_info(handle
, info
)) < 0) {
1043 AL_PRINT("control hardware info (%i): %s\n", card
, psnd_strerror(err
));
1044 psnd_ctl_close(handle
);
1049 while (idx
< MAX_ALL_DEVICES
) {
1050 const char *cname
, *dname
;
1052 if (psnd_ctl_pcm_next_device(handle
, &dev
)<0)
1053 AL_PRINT("snd_ctl_pcm_next_device failed\n");
1057 psnd_pcm_info_set_device(pcminfo
, dev
);
1058 psnd_pcm_info_set_subdevice(pcminfo
, 0);
1059 psnd_pcm_info_set_stream(pcminfo
, stream
);
1060 if ((err
= psnd_ctl_pcm_info(handle
, pcminfo
)) < 0) {
1062 AL_PRINT("control digital audio info (%i): %s\n", card
, psnd_strerror(err
));
1066 cname
= psnd_ctl_card_info_get_name(info
);
1067 dname
= psnd_pcm_info_get_name(pcminfo
);
1068 snprintf(name
, sizeof(name
), "ALSA Software on %s [%s] (hw:%d,%d)",
1069 cname
, dname
, card
, dev
);
1070 allDevNameMap
[idx
].name
= AppendAllDeviceList(name
);
1071 allDevNameMap
[idx
].card
= card
;
1072 allDevNameMap
[idx
].dev
= dev
;
1075 psnd_ctl_close(handle
);
1077 if(psnd_card_next(&card
) < 0) {
1078 AL_PRINT("snd_card_next failed\n");
1084 stream
= SND_PCM_STREAM_CAPTURE
;
1087 if(psnd_card_next(&card
) < 0 || card
< 0) {
1088 AL_PRINT("no capture cards found...\n");
1089 psnd_pcm_info_free(pcminfo
);
1090 psnd_ctl_card_info_free(info
);
1094 allCaptureDevNameMap
[0].name
= AppendCaptureDeviceList("ALSA Capture on default");
1098 sprintf(name
, "hw:%d", card
);
1100 if ((err
= psnd_ctl_open(&handle
, name
, 0)) < 0) {
1101 AL_PRINT("control open (%i): %s\n", card
, psnd_strerror(err
));
1103 if (err
>= 0 && (err
= psnd_ctl_card_info(handle
, info
)) < 0) {
1104 AL_PRINT("control hardware info (%i): %s\n", card
, psnd_strerror(err
));
1109 while (idx
< MAX_ALL_DEVICES
) {
1110 const char *cname
, *dname
;
1112 if (psnd_ctl_pcm_next_device(handle
, &dev
)<0)
1113 AL_PRINT("snd_ctl_pcm_next_device failed\n");
1116 psnd_pcm_info_set_device(pcminfo
, dev
);
1117 psnd_pcm_info_set_subdevice(pcminfo
, 0);
1118 psnd_pcm_info_set_stream(pcminfo
, stream
);
1119 if ((err
= psnd_ctl_pcm_info(handle
, pcminfo
)) < 0) {
1121 AL_PRINT("control digital audio info (%i): %s\n", card
, psnd_strerror(err
));
1125 cname
= psnd_ctl_card_info_get_name(info
);
1126 dname
= psnd_pcm_info_get_name(pcminfo
);
1127 snprintf(name
, sizeof(name
), "ALSA Capture on %s [%s] (hw:%d,%d)",
1128 cname
, dname
, card
, dev
);
1129 allCaptureDevNameMap
[idx
].name
= AppendCaptureDeviceList(name
);
1130 allCaptureDevNameMap
[idx
].card
= card
;
1131 allCaptureDevNameMap
[idx
].dev
= dev
;
1135 if(handle
) psnd_ctl_close(handle
);
1136 if(psnd_card_next(&card
) < 0) {
1137 AL_PRINT("snd_card_next failed\n");
1141 psnd_pcm_info_free(pcminfo
);
1142 psnd_ctl_card_info_free(info
);