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>
54 static void *alsa_handle
;
55 #define MAKE_FUNC(f) static typeof(f) * p##f
56 MAKE_FUNC(snd_strerror
);
57 MAKE_FUNC(snd_pcm_open
);
58 MAKE_FUNC(snd_pcm_close
);
59 MAKE_FUNC(snd_pcm_nonblock
);
60 MAKE_FUNC(snd_pcm_frames_to_bytes
);
61 MAKE_FUNC(snd_pcm_hw_params_malloc
);
62 MAKE_FUNC(snd_pcm_hw_params_free
);
63 MAKE_FUNC(snd_pcm_hw_params_any
);
64 MAKE_FUNC(snd_pcm_hw_params_set_access
);
65 MAKE_FUNC(snd_pcm_hw_params_set_format
);
66 MAKE_FUNC(snd_pcm_hw_params_set_channels
);
67 MAKE_FUNC(snd_pcm_hw_params_set_periods_near
);
68 MAKE_FUNC(snd_pcm_hw_params_set_rate_near
);
69 MAKE_FUNC(snd_pcm_hw_params_set_rate
);
70 MAKE_FUNC(snd_pcm_hw_params_set_buffer_size_near
);
71 MAKE_FUNC(snd_pcm_hw_params_set_period_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_get_periods
);
77 MAKE_FUNC(snd_pcm_hw_params
);
78 MAKE_FUNC(snd_pcm_sw_params_malloc
);
79 MAKE_FUNC(snd_pcm_sw_params_current
);
80 MAKE_FUNC(snd_pcm_sw_params_set_avail_min
);
81 MAKE_FUNC(snd_pcm_sw_params
);
82 MAKE_FUNC(snd_pcm_sw_params_free
);
83 MAKE_FUNC(snd_pcm_prepare
);
84 MAKE_FUNC(snd_pcm_start
);
85 MAKE_FUNC(snd_pcm_resume
);
86 MAKE_FUNC(snd_pcm_wait
);
87 MAKE_FUNC(snd_pcm_state
);
88 MAKE_FUNC(snd_pcm_avail_update
);
89 MAKE_FUNC(snd_pcm_areas_silence
);
90 MAKE_FUNC(snd_pcm_mmap_begin
);
91 MAKE_FUNC(snd_pcm_mmap_commit
);
92 MAKE_FUNC(snd_pcm_readi
);
93 MAKE_FUNC(snd_pcm_writei
);
94 MAKE_FUNC(snd_pcm_drain
);
95 MAKE_FUNC(snd_pcm_info_malloc
);
96 MAKE_FUNC(snd_pcm_info_free
);
97 MAKE_FUNC(snd_pcm_info_set_device
);
98 MAKE_FUNC(snd_pcm_info_set_subdevice
);
99 MAKE_FUNC(snd_pcm_info_set_stream
);
100 MAKE_FUNC(snd_pcm_info_get_name
);
101 MAKE_FUNC(snd_ctl_pcm_next_device
);
102 MAKE_FUNC(snd_ctl_pcm_info
);
103 MAKE_FUNC(snd_ctl_open
);
104 MAKE_FUNC(snd_ctl_close
);
105 MAKE_FUNC(snd_ctl_card_info_malloc
);
106 MAKE_FUNC(snd_ctl_card_info_free
);
107 MAKE_FUNC(snd_ctl_card_info
);
108 MAKE_FUNC(snd_ctl_card_info_get_name
);
109 MAKE_FUNC(snd_card_next
);
113 static const ALCchar alsaDevice
[] = "ALSA Software";
114 static DevMap
*allDevNameMap
;
115 static ALuint numDevNames
;
116 static DevMap
*allCaptureDevNameMap
;
117 static ALuint numCaptureDevNames
;
118 static volatile ALuint load_count
;
128 alsa_handle
= dlopen("libasound.so.2", RTLD_NOW
);
133 #define LOAD_FUNC(f) do { \
134 p##f = dlsym(alsa_handle, #f); \
135 if((str=dlerror()) != NULL) \
137 dlclose(alsa_handle); \
138 alsa_handle = NULL; \
139 AL_PRINT("Could not load %s from libasound.so.2: %s\n", #f, str); \
145 alsa_handle
= (void*)0xDEADBEEF;
146 #define LOAD_FUNC(f) p##f = f
149 LOAD_FUNC(snd_strerror
);
150 LOAD_FUNC(snd_pcm_open
);
151 LOAD_FUNC(snd_pcm_close
);
152 LOAD_FUNC(snd_pcm_nonblock
);
153 LOAD_FUNC(snd_pcm_frames_to_bytes
);
154 LOAD_FUNC(snd_pcm_hw_params_malloc
);
155 LOAD_FUNC(snd_pcm_hw_params_free
);
156 LOAD_FUNC(snd_pcm_hw_params_any
);
157 LOAD_FUNC(snd_pcm_hw_params_set_access
);
158 LOAD_FUNC(snd_pcm_hw_params_set_format
);
159 LOAD_FUNC(snd_pcm_hw_params_set_channels
);
160 LOAD_FUNC(snd_pcm_hw_params_set_periods_near
);
161 LOAD_FUNC(snd_pcm_hw_params_set_rate_near
);
162 LOAD_FUNC(snd_pcm_hw_params_set_rate
);
163 LOAD_FUNC(snd_pcm_hw_params_set_buffer_size_near
);
164 LOAD_FUNC(snd_pcm_hw_params_set_buffer_size_min
);
165 LOAD_FUNC(snd_pcm_hw_params_set_period_size_near
);
166 LOAD_FUNC(snd_pcm_hw_params_get_buffer_size
);
167 LOAD_FUNC(snd_pcm_hw_params_get_period_size
);
168 LOAD_FUNC(snd_pcm_hw_params_get_access
);
169 LOAD_FUNC(snd_pcm_hw_params_get_periods
);
170 LOAD_FUNC(snd_pcm_hw_params
);
171 LOAD_FUNC(snd_pcm_sw_params_malloc
);
172 LOAD_FUNC(snd_pcm_sw_params_current
);
173 LOAD_FUNC(snd_pcm_sw_params_set_avail_min
);
174 LOAD_FUNC(snd_pcm_sw_params
);
175 LOAD_FUNC(snd_pcm_sw_params_free
);
176 LOAD_FUNC(snd_pcm_prepare
);
177 LOAD_FUNC(snd_pcm_start
);
178 LOAD_FUNC(snd_pcm_resume
);
179 LOAD_FUNC(snd_pcm_wait
);
180 LOAD_FUNC(snd_pcm_state
);
181 LOAD_FUNC(snd_pcm_avail_update
);
182 LOAD_FUNC(snd_pcm_areas_silence
);
183 LOAD_FUNC(snd_pcm_mmap_begin
);
184 LOAD_FUNC(snd_pcm_mmap_commit
);
185 LOAD_FUNC(snd_pcm_readi
);
186 LOAD_FUNC(snd_pcm_writei
);
187 LOAD_FUNC(snd_pcm_drain
);
189 LOAD_FUNC(snd_pcm_info_malloc
);
190 LOAD_FUNC(snd_pcm_info_free
);
191 LOAD_FUNC(snd_pcm_info_set_device
);
192 LOAD_FUNC(snd_pcm_info_set_subdevice
);
193 LOAD_FUNC(snd_pcm_info_set_stream
);
194 LOAD_FUNC(snd_pcm_info_get_name
);
195 LOAD_FUNC(snd_ctl_pcm_next_device
);
196 LOAD_FUNC(snd_ctl_pcm_info
);
197 LOAD_FUNC(snd_ctl_open
);
198 LOAD_FUNC(snd_ctl_close
);
199 LOAD_FUNC(snd_ctl_card_info_malloc
);
200 LOAD_FUNC(snd_ctl_card_info_free
);
201 LOAD_FUNC(snd_ctl_card_info
);
202 LOAD_FUNC(snd_ctl_card_info_get_name
);
203 LOAD_FUNC(snd_card_next
);
210 void alsa_unload(void)
212 if(load_count
== 0 || --load_count
> 0)
216 dlclose(alsa_handle
);
222 static int xrun_recovery(snd_pcm_t
*handle
, int err
)
226 err
= psnd_pcm_prepare(handle
);
228 AL_PRINT("prepare failed: %s\n", psnd_strerror(err
));
230 else if (err
== -ESTRPIPE
)
232 while ((err
= psnd_pcm_resume(handle
)) == -EAGAIN
)
233 Sleep(1); /* wait until the suspend flag is released */
236 err
= psnd_pcm_prepare(handle
);
238 AL_PRINT("prepare failed: %s\n", psnd_strerror(err
));
244 static int verify_state(snd_pcm_t
*handle
)
246 snd_pcm_state_t state
= psnd_pcm_state(handle
);
247 if(state
== SND_PCM_STATE_DISCONNECTED
)
249 if(state
== SND_PCM_STATE_XRUN
)
251 int err
= xrun_recovery(handle
, -EPIPE
);
252 if(err
< 0) return err
;
254 else if(state
== SND_PCM_STATE_SUSPENDED
)
256 int err
= xrun_recovery(handle
, -ESTRPIPE
);
257 if(err
< 0) return err
;
264 static ALuint
ALSAProc(ALvoid
*ptr
)
266 ALCdevice
*pDevice
= (ALCdevice
*)ptr
;
267 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
268 const snd_pcm_channel_area_t
*areas
= NULL
;
269 snd_pcm_sframes_t avail
, commitres
;
270 snd_pcm_uframes_t offset
, frames
;
274 while(!data
->killNow
)
276 int state
= verify_state(data
->pcmHandle
);
279 AL_PRINT("Invalid state detected: %s\n", psnd_strerror(state
));
280 aluHandleDisconnect(pDevice
);
284 avail
= psnd_pcm_avail_update(data
->pcmHandle
);
287 AL_PRINT("available update failed: %s\n", psnd_strerror(avail
));
291 // make sure there's frames to process
292 if((snd_pcm_uframes_t
)avail
< pDevice
->UpdateSize
)
294 if(state
!= SND_PCM_STATE_RUNNING
)
296 err
= psnd_pcm_start(data
->pcmHandle
);
299 AL_PRINT("start failed: %s\n", psnd_strerror(err
));
303 if(psnd_pcm_wait(data
->pcmHandle
, 1000) == 0)
304 AL_PRINT("Wait timeout... buffer size too low?\n");
307 avail
-= avail
%pDevice
->UpdateSize
;
309 // it is possible that contiguous areas are smaller, thus we use a loop
314 err
= psnd_pcm_mmap_begin(data
->pcmHandle
, &areas
, &offset
, &frames
);
317 AL_PRINT("mmap begin error: %s\n", psnd_strerror(err
));
321 WritePtr
= (char*)areas
->addr
+ (offset
* areas
->step
/ 8);
322 aluMixData(pDevice
, WritePtr
, frames
);
324 commitres
= psnd_pcm_mmap_commit(data
->pcmHandle
, offset
, frames
);
325 if(commitres
< 0 || (commitres
-frames
) != 0)
327 AL_PRINT("mmap commit error: %s\n",
328 psnd_strerror(commitres
>= 0 ? -EPIPE
: commitres
));
339 static ALuint
ALSANoMMapProc(ALvoid
*ptr
)
341 ALCdevice
*pDevice
= (ALCdevice
*)ptr
;
342 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
343 snd_pcm_sframes_t avail
;
346 while(!data
->killNow
)
348 int state
= verify_state(data
->pcmHandle
);
351 AL_PRINT("Invalid state detected: %s\n", psnd_strerror(state
));
352 aluHandleDisconnect(pDevice
);
356 WritePtr
= data
->buffer
;
357 avail
= data
->size
/ psnd_pcm_frames_to_bytes(data
->pcmHandle
, 1);
358 aluMixData(pDevice
, WritePtr
, avail
);
362 int ret
= psnd_pcm_writei(data
->pcmHandle
, WritePtr
, avail
);
368 while((ret
=psnd_pcm_resume(data
->pcmHandle
)) == -EAGAIN
)
376 WritePtr
+= psnd_pcm_frames_to_bytes(data
->pcmHandle
, ret
);
383 ret
= psnd_pcm_prepare(data
->pcmHandle
);
393 static ALuint
ALSANoMMapCaptureProc(ALvoid
*ptr
)
395 ALCdevice
*pDevice
= (ALCdevice
*)ptr
;
396 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
397 snd_pcm_sframes_t avail
;
399 while(!data
->killNow
)
401 int state
= verify_state(data
->pcmHandle
);
404 AL_PRINT("Invalid state detected: %s\n", psnd_strerror(state
));
405 aluHandleDisconnect(pDevice
);
409 avail
= (snd_pcm_uframes_t
)data
->size
/ psnd_pcm_frames_to_bytes(data
->pcmHandle
, 1);
410 avail
= psnd_pcm_readi(data
->pcmHandle
, data
->buffer
, avail
);
416 while((avail
=psnd_pcm_resume(data
->pcmHandle
)) == -EAGAIN
)
422 if (avail
>= 0 && data
->doCapture
)
423 WriteRingBuffer(data
->ring
, data
->buffer
, avail
);
428 avail
= psnd_pcm_prepare(data
->pcmHandle
);
430 AL_PRINT("prepare error: %s\n", psnd_strerror(avail
));
437 static ALCboolean
alsa_open_playback(ALCdevice
*device
, const ALCchar
*deviceName
)
443 strncpy(driver
, GetConfigValue("alsa", "device", "default"), sizeof(driver
)-1);
444 driver
[sizeof(driver
)-1] = 0;
446 deviceName
= alsaDevice
;
447 else if(strcmp(deviceName
, alsaDevice
) != 0)
451 for(idx
= 0;idx
< numDevNames
;idx
++)
453 if(allDevNameMap
[idx
].name
&&
454 strcmp(deviceName
, allDevNameMap
[idx
].name
) == 0)
457 sprintf(driver
, "hw:%d,%d", allDevNameMap
[idx
].card
, allDevNameMap
[idx
].dev
);
461 if(idx
== numDevNames
)
469 data
= (alsa_data
*)calloc(1, sizeof(alsa_data
));
471 i
= psnd_pcm_open(&data
->pcmHandle
, driver
, SND_PCM_STREAM_PLAYBACK
, SND_PCM_NONBLOCK
);
475 i
= psnd_pcm_open(&data
->pcmHandle
, driver
, SND_PCM_STREAM_PLAYBACK
, SND_PCM_NONBLOCK
);
479 i
= psnd_pcm_nonblock(data
->pcmHandle
, 0);
481 psnd_pcm_close(data
->pcmHandle
);
486 AL_PRINT("Could not open playback device '%s': %s\n", driver
, psnd_strerror(i
));
491 device
->szDeviceName
= strdup(deviceName
);
492 device
->ExtraData
= data
;
496 static void alsa_close_playback(ALCdevice
*device
)
498 alsa_data
*data
= (alsa_data
*)device
->ExtraData
;
500 psnd_pcm_close(data
->pcmHandle
);
502 device
->ExtraData
= NULL
;
507 static ALCboolean
alsa_reset_playback(ALCdevice
*device
)
509 alsa_data
*data
= (alsa_data
*)device
->ExtraData
;
510 snd_pcm_uframes_t periodSizeInFrames
;
511 snd_pcm_sw_params_t
*sp
= NULL
;
512 snd_pcm_hw_params_t
*p
= NULL
;
513 snd_pcm_access_t access
;
514 snd_pcm_format_t format
;
515 unsigned int periods
;
522 switch(aluBytesFromFormat(device
->Format
))
525 format
= SND_PCM_FORMAT_U8
;
528 format
= SND_PCM_FORMAT_S16
;
531 format
= SND_PCM_FORMAT_FLOAT
;
534 AL_PRINT("Unknown format: 0x%x\n", device
->Format
);
538 allowmmap
= GetConfigValueBool("alsa", "mmap", 1);
539 periods
= device
->NumUpdates
;
540 periodSizeInFrames
= device
->UpdateSize
;
541 rate
= device
->Frequency
;
544 psnd_pcm_hw_params_malloc(&p
);
546 if((i
=psnd_pcm_hw_params_any(data
->pcmHandle
, p
)) < 0)
548 /* set interleaved access */
549 if(err
== NULL
&& (!allowmmap
|| (i
=psnd_pcm_hw_params_set_access(data
->pcmHandle
, p
, SND_PCM_ACCESS_MMAP_INTERLEAVED
)) < 0))
551 if(periods
> 2) periods
--;
552 if((i
=psnd_pcm_hw_params_set_access(data
->pcmHandle
, p
, SND_PCM_ACCESS_RW_INTERLEAVED
)) < 0)
555 /* set format (implicitly sets sample bits) */
556 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_format(data
->pcmHandle
, p
, format
)) < 0)
558 switch(aluChannelsFromFormat(device
->Format
))
560 case 1: device
->Format
= AL_FORMAT_MONO_FLOAT32
; break;
561 case 2: device
->Format
= AL_FORMAT_STEREO_FLOAT32
; break;
562 case 4: device
->Format
= AL_FORMAT_QUAD32
; break;
563 case 6: device
->Format
= AL_FORMAT_51CHN32
; break;
564 case 7: device
->Format
= AL_FORMAT_61CHN32
; break;
565 case 8: device
->Format
= AL_FORMAT_71CHN32
; break;
567 if((i
=psnd_pcm_hw_params_set_format(data
->pcmHandle
, p
, SND_PCM_FORMAT_FLOAT
)) < 0)
569 switch(aluChannelsFromFormat(device
->Format
))
571 case 1: device
->Format
= AL_FORMAT_MONO16
; break;
572 case 2: device
->Format
= AL_FORMAT_STEREO16
; break;
573 case 4: device
->Format
= AL_FORMAT_QUAD16
; break;
574 case 6: device
->Format
= AL_FORMAT_51CHN16
; break;
575 case 7: device
->Format
= AL_FORMAT_61CHN16
; break;
576 case 8: device
->Format
= AL_FORMAT_71CHN16
; break;
578 if((i
=psnd_pcm_hw_params_set_format(data
->pcmHandle
, p
, SND_PCM_FORMAT_S16
)) < 0)
580 switch(aluChannelsFromFormat(device
->Format
))
582 case 1: device
->Format
= AL_FORMAT_MONO8
; break;
583 case 2: device
->Format
= AL_FORMAT_STEREO8
; break;
584 case 4: device
->Format
= AL_FORMAT_QUAD8
; break;
585 case 6: device
->Format
= AL_FORMAT_51CHN8
; break;
586 case 7: device
->Format
= AL_FORMAT_61CHN8
; break;
587 case 8: device
->Format
= AL_FORMAT_71CHN8
; break;
589 if((i
=psnd_pcm_hw_params_set_format(data
->pcmHandle
, p
, SND_PCM_FORMAT_U8
)) < 0)
594 /* set channels (implicitly sets frame bits) */
595 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_channels(data
->pcmHandle
, p
, aluChannelsFromFormat(device
->Format
))) < 0)
597 switch(aluBytesFromFormat(device
->Format
))
599 case 1: device
->Format
= AL_FORMAT_STEREO8
; break;
600 case 2: device
->Format
= AL_FORMAT_STEREO16
; break;
601 case 4: device
->Format
= AL_FORMAT_STEREO_FLOAT32
; break;
603 if((i
=psnd_pcm_hw_params_set_channels(data
->pcmHandle
, p
, 2)) < 0)
605 switch(aluBytesFromFormat(device
->Format
))
607 case 1: device
->Format
= AL_FORMAT_MONO8
; break;
608 case 2: device
->Format
= AL_FORMAT_MONO16
; break;
609 case 4: device
->Format
= AL_FORMAT_MONO_FLOAT32
; break;
611 if((i
=psnd_pcm_hw_params_set_channels(data
->pcmHandle
, p
, 1)) < 0)
612 err
= "set channels";
615 /* set periods (implicitly constrains period/buffer parameters) */
616 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_periods_near(data
->pcmHandle
, p
, &periods
, NULL
)) < 0)
617 err
= "set periods near";
618 /* set rate (implicitly constrains period/buffer parameters) */
619 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_rate_near(data
->pcmHandle
, p
, &rate
, NULL
)) < 0)
620 err
= "set rate near";
621 /* set period size in frame units (implicitly sets buffer size/bytes/time and period time/bytes) */
622 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_period_size_near(data
->pcmHandle
, p
, &periodSizeInFrames
, NULL
)) < 0)
623 err
= "set period size near";
624 /* install and prepare hardware configuration */
625 if(err
== NULL
&& (i
=psnd_pcm_hw_params(data
->pcmHandle
, p
)) < 0)
627 if(err
== NULL
&& (i
=psnd_pcm_hw_params_get_access(p
, &access
)) < 0)
629 if(err
== NULL
&& (i
=psnd_pcm_hw_params_get_period_size(p
, &periodSizeInFrames
, NULL
)) < 0)
630 err
= "get period size";
631 if(err
== NULL
&& (i
=psnd_pcm_hw_params_get_periods(p
, &periods
, NULL
)) < 0)
635 AL_PRINT("%s failed: %s\n", err
, psnd_strerror(i
));
636 psnd_pcm_hw_params_free(p
);
640 psnd_pcm_hw_params_free(p
);
643 psnd_pcm_sw_params_malloc(&sp
);
645 if((i
=psnd_pcm_sw_params_current(data
->pcmHandle
, sp
)) != 0)
647 if(err
== NULL
&& (i
=psnd_pcm_sw_params_set_avail_min(data
->pcmHandle
, sp
, periodSizeInFrames
)) != 0)
648 err
= "sw set avail min";
649 if(err
== NULL
&& (i
=psnd_pcm_sw_params(data
->pcmHandle
, sp
)) != 0)
650 err
= "sw set params";
653 AL_PRINT("%s failed: %s\n", err
, psnd_strerror(i
));
654 psnd_pcm_sw_params_free(sp
);
658 psnd_pcm_sw_params_free(sp
);
660 data
->size
= psnd_pcm_frames_to_bytes(data
->pcmHandle
, periodSizeInFrames
);
661 if(access
== SND_PCM_ACCESS_RW_INTERLEAVED
)
663 /* Increase periods by one, since the temp buffer counts as an extra
666 data
->buffer
= malloc(data
->size
);
669 AL_PRINT("buffer malloc failed\n");
672 data
->thread
= StartThread(ALSANoMMapProc
, device
);
676 i
= psnd_pcm_prepare(data
->pcmHandle
);
679 AL_PRINT("prepare error: %s\n", psnd_strerror(i
));
682 data
->thread
= StartThread(ALSAProc
, device
);
684 if(data
->thread
== NULL
)
686 AL_PRINT("Could not create playback thread\n");
692 device
->UpdateSize
= periodSizeInFrames
;
693 device
->NumUpdates
= periods
;
694 device
->Frequency
= rate
;
699 static void alsa_stop_playback(ALCdevice
*device
)
701 alsa_data
*data
= (alsa_data
*)device
->ExtraData
;
706 StopThread(data
->thread
);
714 static ALCboolean
alsa_open_capture(ALCdevice
*pDevice
, const ALCchar
*deviceName
)
717 snd_pcm_hw_params_t
*p
;
718 snd_pcm_uframes_t bufferSizeInFrames
;
719 snd_pcm_format_t format
;
726 strncpy(driver
, GetConfigValue("alsa", "capture", "default"), sizeof(driver
)-1);
727 driver
[sizeof(driver
)-1] = 0;
729 deviceName
= allCaptureDevNameMap
[0].name
;
734 for(idx
= 0;idx
< numCaptureDevNames
;idx
++)
736 if(allCaptureDevNameMap
[idx
].name
&&
737 strcmp(deviceName
, allCaptureDevNameMap
[idx
].name
) == 0)
739 devName
= allCaptureDevNameMap
[idx
].name
;
741 sprintf(driver
, "plughw:%d,%d", allCaptureDevNameMap
[idx
].card
, allCaptureDevNameMap
[idx
].dev
);
745 if(idx
== numCaptureDevNames
)
753 data
= (alsa_data
*)calloc(1, sizeof(alsa_data
));
755 i
= psnd_pcm_open(&data
->pcmHandle
, driver
, SND_PCM_STREAM_CAPTURE
, SND_PCM_NONBLOCK
);
759 i
= psnd_pcm_open(&data
->pcmHandle
, driver
, SND_PCM_STREAM_CAPTURE
, SND_PCM_NONBLOCK
);
763 i
= psnd_pcm_nonblock(data
->pcmHandle
, 0);
765 psnd_pcm_close(data
->pcmHandle
);
769 AL_PRINT("Could not open capture device '%s': %s\n", driver
, psnd_strerror(i
));
775 switch(aluBytesFromFormat(pDevice
->Format
))
778 format
= SND_PCM_FORMAT_U8
;
781 format
= SND_PCM_FORMAT_S16
;
784 format
= SND_PCM_FORMAT_FLOAT
;
787 AL_PRINT("Unknown format: 0x%x\n", pDevice
->Format
);
792 bufferSizeInFrames
= pDevice
->UpdateSize
* pDevice
->NumUpdates
;
793 psnd_pcm_hw_params_malloc(&p
);
795 if((i
=psnd_pcm_hw_params_any(data
->pcmHandle
, p
)) < 0)
797 /* set interleaved access */
798 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_access(data
->pcmHandle
, p
, SND_PCM_ACCESS_RW_INTERLEAVED
)) < 0)
800 /* set format (implicitly sets sample bits) */
801 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_format(data
->pcmHandle
, p
, format
)) < 0)
803 /* set channels (implicitly sets frame bits) */
804 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_channels(data
->pcmHandle
, p
, aluChannelsFromFormat(pDevice
->Format
))) < 0)
805 err
= "set channels";
806 /* set rate (implicitly constrains period/buffer parameters) */
807 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_rate(data
->pcmHandle
, p
, pDevice
->Frequency
, 0)) < 0)
808 err
= "set rate near";
809 /* set buffer size in frame units (implicitly sets period size/bytes/time and buffer time/bytes) */
810 if(err
== NULL
&& (i
=psnd_pcm_hw_params_set_buffer_size_near(data
->pcmHandle
, p
, &bufferSizeInFrames
)) < 0)
811 err
= "set buffer size near";
812 /* install and prepare hardware configuration */
813 if(err
== NULL
&& (i
=psnd_pcm_hw_params(data
->pcmHandle
, p
)) < 0)
817 AL_PRINT("%s failed: %s\n", err
, psnd_strerror(i
));
818 psnd_pcm_hw_params_free(p
);
822 if((i
=psnd_pcm_hw_params_get_period_size(p
, &bufferSizeInFrames
, NULL
)) < 0)
824 AL_PRINT("get size failed: %s\n", psnd_strerror(i
));
825 psnd_pcm_hw_params_free(p
);
829 psnd_pcm_hw_params_free(p
);
831 frameSize
= aluChannelsFromFormat(pDevice
->Format
);
832 frameSize
*= aluBytesFromFormat(pDevice
->Format
);
834 data
->ring
= CreateRingBuffer(frameSize
, pDevice
->UpdateSize
*pDevice
->NumUpdates
);
837 AL_PRINT("ring buffer create failed\n");
841 data
->size
= psnd_pcm_frames_to_bytes(data
->pcmHandle
, bufferSizeInFrames
);
842 data
->buffer
= malloc(data
->size
);
845 AL_PRINT("buffer malloc failed\n");
849 pDevice
->ExtraData
= data
;
850 data
->thread
= StartThread(ALSANoMMapCaptureProc
, pDevice
);
851 if(data
->thread
== NULL
)
853 AL_PRINT("Could not create capture thread\n");
857 pDevice
->szDeviceName
= strdup(deviceName
);
862 DestroyRingBuffer(data
->ring
);
863 psnd_pcm_close(data
->pcmHandle
);
867 pDevice
->ExtraData
= NULL
;
871 static void alsa_close_capture(ALCdevice
*pDevice
)
873 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
876 StopThread(data
->thread
);
878 psnd_pcm_close(data
->pcmHandle
);
879 DestroyRingBuffer(data
->ring
);
883 pDevice
->ExtraData
= NULL
;
888 static void alsa_start_capture(ALCdevice
*pDevice
)
890 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
894 static void alsa_stop_capture(ALCdevice
*pDevice
)
896 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
900 static void alsa_capture_samples(ALCdevice
*pDevice
, ALCvoid
*pBuffer
, ALCuint lSamples
)
902 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
904 if(lSamples
<= (ALCuint
)RingBufferSize(data
->ring
))
905 ReadRingBuffer(data
->ring
, pBuffer
, lSamples
);
907 alcSetError(ALC_INVALID_VALUE
);
910 static ALCuint
alsa_available_samples(ALCdevice
*pDevice
)
912 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
913 return RingBufferSize(data
->ring
);
917 BackendFuncs alsa_funcs
= {
926 alsa_capture_samples
,
927 alsa_available_samples
930 void alc_alsa_init(BackendFuncs
*func_list
)
932 *func_list
= alsa_funcs
;
935 void alc_alsa_deinit(void)
939 for(i
= 0;i
< numDevNames
;++i
)
940 free(allDevNameMap
[i
].name
);
942 allDevNameMap
= NULL
;
945 for(i
= 0;i
< numCaptureDevNames
;++i
)
946 free(allCaptureDevNameMap
[i
].name
);
947 free(allCaptureDevNameMap
);
948 allCaptureDevNameMap
= NULL
;
949 numCaptureDevNames
= 0;
952 void alc_alsa_probe(int type
)
955 int card
, err
, dev
, idx
;
956 snd_ctl_card_info_t
*info
;
957 snd_pcm_info_t
*pcminfo
;
958 snd_pcm_stream_t stream
;
963 if(!alsa_handle
) return;
965 psnd_ctl_card_info_malloc(&info
);
966 psnd_pcm_info_malloc(&pcminfo
);
969 if((err
=psnd_card_next(&card
)) < 0)
970 AL_PRINT("Failed to find a card: %s\n", psnd_strerror(err
));
972 if(type
== DEVICE_PROBE
)
973 AppendDeviceList(alsaDevice
);
974 else if(type
== ALL_DEVICE_PROBE
)
976 stream
= SND_PCM_STREAM_PLAYBACK
;
978 for(i
= 0;i
< numDevNames
;++i
)
979 free(allDevNameMap
[i
].name
);
981 allDevNameMap
= realloc(allDevNameMap
, sizeof(DevMap
) * 1);
982 allDevNameMap
[0].name
= strdup("ALSA Software on default");
983 AppendAllDeviceList(allDevNameMap
[0].name
);
987 sprintf(name
, "hw:%d", card
);
988 if ((err
= psnd_ctl_open(&handle
, name
, 0)) < 0) {
989 AL_PRINT("control open (%i): %s\n", card
, psnd_strerror(err
));
992 if ((err
= psnd_ctl_card_info(handle
, info
)) < 0) {
993 AL_PRINT("control hardware info (%i): %s\n", card
, psnd_strerror(err
));
994 psnd_ctl_close(handle
);
1000 const char *cname
, *dname
;
1003 if (psnd_ctl_pcm_next_device(handle
, &dev
)<0)
1004 AL_PRINT("snd_ctl_pcm_next_device failed\n");
1008 psnd_pcm_info_set_device(pcminfo
, dev
);
1009 psnd_pcm_info_set_subdevice(pcminfo
, 0);
1010 psnd_pcm_info_set_stream(pcminfo
, stream
);
1011 if ((err
= psnd_ctl_pcm_info(handle
, pcminfo
)) < 0) {
1013 AL_PRINT("control digital audio info (%i): %s\n", card
, psnd_strerror(err
));
1017 temp
= realloc(allDevNameMap
, sizeof(DevMap
) * (idx
+1));
1020 allDevNameMap
= temp
;
1021 cname
= psnd_ctl_card_info_get_name(info
);
1022 dname
= psnd_pcm_info_get_name(pcminfo
);
1023 snprintf(name
, sizeof(name
), "ALSA Software on %s [%s] (hw:%d,%d)",
1024 cname
, dname
, card
, dev
);
1025 AppendAllDeviceList(name
);
1026 allDevNameMap
[idx
].name
= strdup(name
);
1027 allDevNameMap
[idx
].card
= card
;
1028 allDevNameMap
[idx
].dev
= dev
;
1032 psnd_ctl_close(handle
);
1034 if(psnd_card_next(&card
) < 0) {
1035 AL_PRINT("snd_card_next failed\n");
1041 else if(type
== CAPTURE_DEVICE_PROBE
)
1043 stream
= SND_PCM_STREAM_CAPTURE
;
1045 for(i
= 0;i
< numCaptureDevNames
;++i
)
1046 free(allCaptureDevNameMap
[i
].name
);
1048 allCaptureDevNameMap
= realloc(allCaptureDevNameMap
, sizeof(DevMap
) * 1);
1049 allCaptureDevNameMap
[0].name
= strdup("ALSA Capture on default");
1050 AppendCaptureDeviceList(allCaptureDevNameMap
[0].name
);
1054 sprintf(name
, "hw:%d", card
);
1056 if ((err
= psnd_ctl_open(&handle
, name
, 0)) < 0) {
1057 AL_PRINT("control open (%i): %s\n", card
, psnd_strerror(err
));
1059 if (err
>= 0 && (err
= psnd_ctl_card_info(handle
, info
)) < 0) {
1060 AL_PRINT("control hardware info (%i): %s\n", card
, psnd_strerror(err
));
1066 const char *cname
, *dname
;
1069 if (psnd_ctl_pcm_next_device(handle
, &dev
)<0)
1070 AL_PRINT("snd_ctl_pcm_next_device failed\n");
1073 psnd_pcm_info_set_device(pcminfo
, dev
);
1074 psnd_pcm_info_set_subdevice(pcminfo
, 0);
1075 psnd_pcm_info_set_stream(pcminfo
, stream
);
1076 if ((err
= psnd_ctl_pcm_info(handle
, pcminfo
)) < 0) {
1078 AL_PRINT("control digital audio info (%i): %s\n", card
, psnd_strerror(err
));
1082 temp
= realloc(allCaptureDevNameMap
, sizeof(DevMap
) * (idx
+1));
1085 allCaptureDevNameMap
= temp
;
1086 cname
= psnd_ctl_card_info_get_name(info
);
1087 dname
= psnd_pcm_info_get_name(pcminfo
);
1088 snprintf(name
, sizeof(name
), "ALSA Capture on %s [%s] (hw:%d,%d)",
1089 cname
, dname
, card
, dev
);
1090 AppendCaptureDeviceList(name
);
1091 allCaptureDevNameMap
[idx
].name
= strdup(name
);
1092 allCaptureDevNameMap
[idx
].card
= card
;
1093 allCaptureDevNameMap
[idx
].dev
= dev
;
1098 if(handle
) psnd_ctl_close(handle
);
1099 if(psnd_card_next(&card
) < 0) {
1100 AL_PRINT("snd_card_next failed\n");
1104 numCaptureDevNames
= idx
;
1107 psnd_pcm_info_free(pcminfo
);
1108 psnd_ctl_card_info_free(info
);