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_rate_resample
);
71 MAKE_FUNC(snd_pcm_hw_params_set_buffer_time_near
);
72 MAKE_FUNC(snd_pcm_hw_params_set_period_time_near
);
73 MAKE_FUNC(snd_pcm_hw_params_set_buffer_size_near
);
74 MAKE_FUNC(snd_pcm_hw_params_set_period_size_near
);
75 MAKE_FUNC(snd_pcm_hw_params_set_buffer_size_min
);
76 MAKE_FUNC(snd_pcm_hw_params_get_buffer_size
);
77 MAKE_FUNC(snd_pcm_hw_params_get_period_size
);
78 MAKE_FUNC(snd_pcm_hw_params_get_access
);
79 MAKE_FUNC(snd_pcm_hw_params_get_periods
);
80 MAKE_FUNC(snd_pcm_hw_params
);
81 MAKE_FUNC(snd_pcm_sw_params_malloc
);
82 MAKE_FUNC(snd_pcm_sw_params_current
);
83 MAKE_FUNC(snd_pcm_sw_params_set_avail_min
);
84 MAKE_FUNC(snd_pcm_sw_params
);
85 MAKE_FUNC(snd_pcm_sw_params_free
);
86 MAKE_FUNC(snd_pcm_prepare
);
87 MAKE_FUNC(snd_pcm_start
);
88 MAKE_FUNC(snd_pcm_resume
);
89 MAKE_FUNC(snd_pcm_wait
);
90 MAKE_FUNC(snd_pcm_state
);
91 MAKE_FUNC(snd_pcm_avail_update
);
92 MAKE_FUNC(snd_pcm_areas_silence
);
93 MAKE_FUNC(snd_pcm_mmap_begin
);
94 MAKE_FUNC(snd_pcm_mmap_commit
);
95 MAKE_FUNC(snd_pcm_readi
);
96 MAKE_FUNC(snd_pcm_writei
);
97 MAKE_FUNC(snd_pcm_drain
);
98 MAKE_FUNC(snd_pcm_recover
);
99 MAKE_FUNC(snd_pcm_info_malloc
);
100 MAKE_FUNC(snd_pcm_info_free
);
101 MAKE_FUNC(snd_pcm_info_set_device
);
102 MAKE_FUNC(snd_pcm_info_set_subdevice
);
103 MAKE_FUNC(snd_pcm_info_set_stream
);
104 MAKE_FUNC(snd_pcm_info_get_name
);
105 MAKE_FUNC(snd_ctl_pcm_next_device
);
106 MAKE_FUNC(snd_ctl_pcm_info
);
107 MAKE_FUNC(snd_ctl_open
);
108 MAKE_FUNC(snd_ctl_close
);
109 MAKE_FUNC(snd_ctl_card_info_malloc
);
110 MAKE_FUNC(snd_ctl_card_info_free
);
111 MAKE_FUNC(snd_ctl_card_info
);
112 MAKE_FUNC(snd_ctl_card_info_get_name
);
113 MAKE_FUNC(snd_card_next
);
117 static const ALCchar alsaDevice
[] = "ALSA Software";
118 static DevMap
*allDevNameMap
;
119 static ALuint numDevNames
;
120 static DevMap
*allCaptureDevNameMap
;
121 static ALuint numCaptureDevNames
;
122 static volatile ALuint load_count
;
125 void *alsa_load(void)
132 alsa_handle
= dlopen("libasound.so.2", RTLD_NOW
);
137 #define LOAD_FUNC(f) do { \
138 p##f = dlsym(alsa_handle, #f); \
139 if((str=dlerror()) != NULL) \
141 dlclose(alsa_handle); \
142 alsa_handle = NULL; \
143 AL_PRINT("Could not load %s from libasound.so.2: %s\n", #f, str); \
149 alsa_handle
= (void*)0xDEADBEEF;
150 #define LOAD_FUNC(f) p##f = f
153 LOAD_FUNC(snd_strerror
);
154 LOAD_FUNC(snd_pcm_open
);
155 LOAD_FUNC(snd_pcm_close
);
156 LOAD_FUNC(snd_pcm_nonblock
);
157 LOAD_FUNC(snd_pcm_frames_to_bytes
);
158 LOAD_FUNC(snd_pcm_hw_params_malloc
);
159 LOAD_FUNC(snd_pcm_hw_params_free
);
160 LOAD_FUNC(snd_pcm_hw_params_any
);
161 LOAD_FUNC(snd_pcm_hw_params_set_access
);
162 LOAD_FUNC(snd_pcm_hw_params_set_format
);
163 LOAD_FUNC(snd_pcm_hw_params_set_channels
);
164 LOAD_FUNC(snd_pcm_hw_params_set_periods_near
);
165 LOAD_FUNC(snd_pcm_hw_params_set_rate_near
);
166 LOAD_FUNC(snd_pcm_hw_params_set_rate
);
167 LOAD_FUNC(snd_pcm_hw_params_set_rate_resample
);
168 LOAD_FUNC(snd_pcm_hw_params_set_buffer_time_near
);
169 LOAD_FUNC(snd_pcm_hw_params_set_period_time_near
);
170 LOAD_FUNC(snd_pcm_hw_params_set_buffer_size_near
);
171 LOAD_FUNC(snd_pcm_hw_params_set_buffer_size_min
);
172 LOAD_FUNC(snd_pcm_hw_params_set_period_size_near
);
173 LOAD_FUNC(snd_pcm_hw_params_get_buffer_size
);
174 LOAD_FUNC(snd_pcm_hw_params_get_period_size
);
175 LOAD_FUNC(snd_pcm_hw_params_get_access
);
176 LOAD_FUNC(snd_pcm_hw_params_get_periods
);
177 LOAD_FUNC(snd_pcm_hw_params
);
178 LOAD_FUNC(snd_pcm_sw_params_malloc
);
179 LOAD_FUNC(snd_pcm_sw_params_current
);
180 LOAD_FUNC(snd_pcm_sw_params_set_avail_min
);
181 LOAD_FUNC(snd_pcm_sw_params
);
182 LOAD_FUNC(snd_pcm_sw_params_free
);
183 LOAD_FUNC(snd_pcm_prepare
);
184 LOAD_FUNC(snd_pcm_start
);
185 LOAD_FUNC(snd_pcm_resume
);
186 LOAD_FUNC(snd_pcm_wait
);
187 LOAD_FUNC(snd_pcm_state
);
188 LOAD_FUNC(snd_pcm_avail_update
);
189 LOAD_FUNC(snd_pcm_areas_silence
);
190 LOAD_FUNC(snd_pcm_mmap_begin
);
191 LOAD_FUNC(snd_pcm_mmap_commit
);
192 LOAD_FUNC(snd_pcm_readi
);
193 LOAD_FUNC(snd_pcm_writei
);
194 LOAD_FUNC(snd_pcm_drain
);
195 LOAD_FUNC(snd_pcm_recover
);
197 LOAD_FUNC(snd_pcm_info_malloc
);
198 LOAD_FUNC(snd_pcm_info_free
);
199 LOAD_FUNC(snd_pcm_info_set_device
);
200 LOAD_FUNC(snd_pcm_info_set_subdevice
);
201 LOAD_FUNC(snd_pcm_info_set_stream
);
202 LOAD_FUNC(snd_pcm_info_get_name
);
203 LOAD_FUNC(snd_ctl_pcm_next_device
);
204 LOAD_FUNC(snd_ctl_pcm_info
);
205 LOAD_FUNC(snd_ctl_open
);
206 LOAD_FUNC(snd_ctl_close
);
207 LOAD_FUNC(snd_ctl_card_info_malloc
);
208 LOAD_FUNC(snd_ctl_card_info_free
);
209 LOAD_FUNC(snd_ctl_card_info
);
210 LOAD_FUNC(snd_ctl_card_info_get_name
);
211 LOAD_FUNC(snd_card_next
);
220 void alsa_unload(void)
222 if(load_count
== 0 || --load_count
> 0)
226 dlclose(alsa_handle
);
231 static DevMap
*probe_devices(snd_pcm_stream_t stream
, ALuint
*count
)
234 int card
, err
, dev
, idx
;
235 snd_ctl_card_info_t
*info
;
236 snd_pcm_info_t
*pcminfo
;
240 psnd_ctl_card_info_malloc(&info
);
241 psnd_pcm_info_malloc(&pcminfo
);
244 if((err
=psnd_card_next(&card
)) < 0)
245 AL_PRINT("Failed to find a card: %s\n", psnd_strerror(err
));
247 DevList
= malloc(sizeof(DevMap
) * 1);
248 DevList
[0].name
= strdup((stream
== SND_PCM_STREAM_PLAYBACK
) ?
249 "ALSA Software on default" :
250 "ALSA Capture on default");
254 sprintf(name
, "hw:%d", card
);
255 if((err
= psnd_ctl_open(&handle
, name
, 0)) < 0)
257 AL_PRINT("control open (%i): %s\n", card
, psnd_strerror(err
));
260 if((err
= psnd_ctl_card_info(handle
, info
)) < 0)
262 AL_PRINT("control hardware info (%i): %s\n", card
, psnd_strerror(err
));
263 psnd_ctl_close(handle
);
270 const char *cname
, *dname
;
273 if(psnd_ctl_pcm_next_device(handle
, &dev
) < 0)
274 AL_PRINT("snd_ctl_pcm_next_device failed\n");
278 psnd_pcm_info_set_device(pcminfo
, dev
);
279 psnd_pcm_info_set_subdevice(pcminfo
, 0);
280 psnd_pcm_info_set_stream(pcminfo
, stream
);
281 if((err
= psnd_ctl_pcm_info(handle
, pcminfo
)) < 0) {
283 AL_PRINT("control digital audio info (%i): %s\n", card
, psnd_strerror(err
));
287 temp
= realloc(DevList
, sizeof(DevMap
) * (idx
+1));
291 cname
= psnd_ctl_card_info_get_name(info
);
292 dname
= psnd_pcm_info_get_name(pcminfo
);
293 snprintf(name
, sizeof(name
), "ALSA %s on %s [%s] (hw:%d,%d)",
294 ((stream
== SND_PCM_STREAM_PLAYBACK
) ?
295 "Software" : "Capture"), cname
, dname
, card
, dev
);
296 DevList
[idx
].name
= strdup(name
);
297 DevList
[idx
].card
= card
;
298 DevList
[idx
].dev
= dev
;
302 psnd_ctl_close(handle
);
304 if(psnd_card_next(&card
) < 0) {
305 AL_PRINT("snd_card_next failed\n");
310 psnd_pcm_info_free(pcminfo
);
311 psnd_ctl_card_info_free(info
);
318 static int xrun_recovery(snd_pcm_t
*handle
, int err
)
320 if(err
== -EINTR
|| err
== -EPIPE
|| err
== -ESTRPIPE
)
322 err
= psnd_pcm_recover(handle
, err
, 1);
324 err
= psnd_pcm_prepare(handle
);
326 AL_PRINT("recover failed: %s\n", psnd_strerror(err
));
331 static int verify_state(snd_pcm_t
*handle
)
333 snd_pcm_state_t state
= psnd_pcm_state(handle
);
334 if(state
== SND_PCM_STATE_DISCONNECTED
)
336 if(state
== SND_PCM_STATE_XRUN
)
338 int err
= xrun_recovery(handle
, -EPIPE
);
339 if(err
< 0) return err
;
341 else if(state
== SND_PCM_STATE_SUSPENDED
)
343 int err
= xrun_recovery(handle
, -ESTRPIPE
);
344 if(err
< 0) return err
;
351 static ALuint
ALSAProc(ALvoid
*ptr
)
353 ALCdevice
*pDevice
= (ALCdevice
*)ptr
;
354 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
355 const snd_pcm_channel_area_t
*areas
= NULL
;
356 snd_pcm_sframes_t avail
, commitres
;
357 snd_pcm_uframes_t offset
, frames
;
363 while(!data
->killNow
)
365 int state
= verify_state(data
->pcmHandle
);
368 AL_PRINT("Invalid state detected: %s\n", psnd_strerror(state
));
369 aluHandleDisconnect(pDevice
);
373 avail
= psnd_pcm_avail_update(data
->pcmHandle
);
376 AL_PRINT("available update failed: %s\n", psnd_strerror(avail
));
380 // make sure there's frames to process
381 if((snd_pcm_uframes_t
)avail
< pDevice
->UpdateSize
)
383 if(state
!= SND_PCM_STATE_RUNNING
)
385 err
= psnd_pcm_start(data
->pcmHandle
);
388 AL_PRINT("start failed: %s\n", psnd_strerror(err
));
392 if(psnd_pcm_wait(data
->pcmHandle
, 1000) == 0)
393 AL_PRINT("Wait timeout... buffer size too low?\n");
396 avail
-= avail
%pDevice
->UpdateSize
;
398 // it is possible that contiguous areas are smaller, thus we use a loop
403 err
= psnd_pcm_mmap_begin(data
->pcmHandle
, &areas
, &offset
, &frames
);
406 AL_PRINT("mmap begin error: %s\n", psnd_strerror(err
));
410 WritePtr
= (char*)areas
->addr
+ (offset
* areas
->step
/ 8);
411 aluMixData(pDevice
, WritePtr
, frames
);
413 commitres
= psnd_pcm_mmap_commit(data
->pcmHandle
, offset
, frames
);
414 if(commitres
< 0 || (commitres
-frames
) != 0)
416 AL_PRINT("mmap commit error: %s\n",
417 psnd_strerror(commitres
>= 0 ? -EPIPE
: commitres
));
428 static ALuint
ALSANoMMapProc(ALvoid
*ptr
)
430 ALCdevice
*pDevice
= (ALCdevice
*)ptr
;
431 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
432 snd_pcm_sframes_t avail
;
437 while(!data
->killNow
)
439 int state
= verify_state(data
->pcmHandle
);
442 AL_PRINT("Invalid state detected: %s\n", psnd_strerror(state
));
443 aluHandleDisconnect(pDevice
);
447 WritePtr
= data
->buffer
;
448 avail
= data
->size
/ psnd_pcm_frames_to_bytes(data
->pcmHandle
, 1);
449 aluMixData(pDevice
, WritePtr
, avail
);
453 int ret
= psnd_pcm_writei(data
->pcmHandle
, WritePtr
, avail
);
461 ret
= psnd_pcm_recover(data
->pcmHandle
, ret
, 1);
463 psnd_pcm_prepare(data
->pcmHandle
);
468 WritePtr
+= psnd_pcm_frames_to_bytes(data
->pcmHandle
, ret
);
475 ret
= psnd_pcm_prepare(data
->pcmHandle
);
485 static ALuint
ALSANoMMapCaptureProc(ALvoid
*ptr
)
487 ALCdevice
*pDevice
= (ALCdevice
*)ptr
;
488 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
489 snd_pcm_sframes_t avail
;
493 while(!data
->killNow
)
495 int state
= verify_state(data
->pcmHandle
);
498 AL_PRINT("Invalid state detected: %s\n", psnd_strerror(state
));
499 aluHandleDisconnect(pDevice
);
503 avail
= (snd_pcm_uframes_t
)data
->size
/ psnd_pcm_frames_to_bytes(data
->pcmHandle
, 1);
504 avail
= psnd_pcm_readi(data
->pcmHandle
, data
->buffer
, avail
);
512 avail
= psnd_pcm_recover(data
->pcmHandle
, avail
, 1);
514 psnd_pcm_prepare(data
->pcmHandle
);
517 if (avail
>= 0 && data
->doCapture
)
518 WriteRingBuffer(data
->ring
, data
->buffer
, avail
);
523 avail
= psnd_pcm_prepare(data
->pcmHandle
);
525 AL_PRINT("prepare error: %s\n", psnd_strerror(avail
));
532 static ALCboolean
alsa_open_playback(ALCdevice
*device
, const ALCchar
*deviceName
)
541 strncpy(driver
, GetConfigValue("alsa", "device", "default"), sizeof(driver
)-1);
542 driver
[sizeof(driver
)-1] = 0;
545 deviceName
= alsaDevice
;
546 else if(strcmp(deviceName
, alsaDevice
) != 0)
551 allDevNameMap
= probe_devices(SND_PCM_STREAM_PLAYBACK
, &numDevNames
);
553 for(idx
= 0;idx
< numDevNames
;idx
++)
555 if(allDevNameMap
[idx
].name
&&
556 strcmp(deviceName
, allDevNameMap
[idx
].name
) == 0)
559 sprintf(driver
, "hw:%d,%d", allDevNameMap
[idx
].card
, allDevNameMap
[idx
].dev
);
563 if(idx
== numDevNames
)
570 data
= (alsa_data
*)calloc(1, sizeof(alsa_data
));
572 i
= psnd_pcm_open(&data
->pcmHandle
, driver
, SND_PCM_STREAM_PLAYBACK
, SND_PCM_NONBLOCK
);
576 i
= psnd_pcm_open(&data
->pcmHandle
, driver
, SND_PCM_STREAM_PLAYBACK
, SND_PCM_NONBLOCK
);
580 i
= psnd_pcm_nonblock(data
->pcmHandle
, 0);
582 psnd_pcm_close(data
->pcmHandle
);
587 AL_PRINT("Could not open playback device '%s': %s\n", driver
, psnd_strerror(i
));
592 device
->szDeviceName
= strdup(deviceName
);
593 device
->ExtraData
= data
;
597 static void alsa_close_playback(ALCdevice
*device
)
599 alsa_data
*data
= (alsa_data
*)device
->ExtraData
;
601 psnd_pcm_close(data
->pcmHandle
);
603 device
->ExtraData
= NULL
;
608 static ALCboolean
alsa_reset_playback(ALCdevice
*device
)
610 alsa_data
*data
= (alsa_data
*)device
->ExtraData
;
611 snd_pcm_uframes_t periodSizeInFrames
;
612 unsigned int periodLen
, bufferLen
;
613 snd_pcm_sw_params_t
*sp
= NULL
;
614 snd_pcm_hw_params_t
*p
= NULL
;
615 snd_pcm_access_t access
;
616 snd_pcm_format_t format
;
617 unsigned int periods
;
624 switch(aluBytesFromFormat(device
->Format
))
627 format
= SND_PCM_FORMAT_U8
;
630 format
= SND_PCM_FORMAT_S16
;
633 format
= SND_PCM_FORMAT_FLOAT
;
636 AL_PRINT("Unknown format: 0x%x\n", device
->Format
);
640 allowmmap
= GetConfigValueBool("alsa", "mmap", 1);
641 periods
= device
->NumUpdates
;
642 periodLen
= (ALuint64
)device
->UpdateSize
* 1000000 / device
->Frequency
;
643 rate
= device
->Frequency
;
646 psnd_pcm_hw_params_malloc(&p
);
648 if((i
=psnd_pcm_hw_params_any(data
->pcmHandle
, p
)) < 0)
650 /* set interleaved access */
651 if(i
>= 0 && (!allowmmap
|| (i
=psnd_pcm_hw_params_set_access(data
->pcmHandle
, p
, SND_PCM_ACCESS_MMAP_INTERLEAVED
)) < 0))
653 if(periods
> 2) periods
--;
654 if((i
=psnd_pcm_hw_params_set_access(data
->pcmHandle
, p
, SND_PCM_ACCESS_RW_INTERLEAVED
)) < 0)
657 /* set format (implicitly sets sample bits) */
658 if(i
>= 0 && (i
=psnd_pcm_hw_params_set_format(data
->pcmHandle
, p
, format
)) < 0)
660 switch(aluChannelsFromFormat(device
->Format
))
662 case 1: device
->Format
= AL_FORMAT_MONO_FLOAT32
; break;
663 case 2: device
->Format
= AL_FORMAT_STEREO_FLOAT32
; break;
664 case 4: device
->Format
= AL_FORMAT_QUAD32
; break;
665 case 6: device
->Format
= AL_FORMAT_51CHN32
; break;
666 case 7: device
->Format
= AL_FORMAT_61CHN32
; break;
667 case 8: device
->Format
= AL_FORMAT_71CHN32
; break;
669 if((i
=psnd_pcm_hw_params_set_format(data
->pcmHandle
, p
, SND_PCM_FORMAT_FLOAT
)) < 0)
671 switch(aluChannelsFromFormat(device
->Format
))
673 case 1: device
->Format
= AL_FORMAT_MONO16
; break;
674 case 2: device
->Format
= AL_FORMAT_STEREO16
; break;
675 case 4: device
->Format
= AL_FORMAT_QUAD16
; break;
676 case 6: device
->Format
= AL_FORMAT_51CHN16
; break;
677 case 7: device
->Format
= AL_FORMAT_61CHN16
; break;
678 case 8: device
->Format
= AL_FORMAT_71CHN16
; break;
680 if((i
=psnd_pcm_hw_params_set_format(data
->pcmHandle
, p
, SND_PCM_FORMAT_S16
)) < 0)
682 switch(aluChannelsFromFormat(device
->Format
))
684 case 1: device
->Format
= AL_FORMAT_MONO8
; break;
685 case 2: device
->Format
= AL_FORMAT_STEREO8
; break;
686 case 4: device
->Format
= AL_FORMAT_QUAD8
; break;
687 case 6: device
->Format
= AL_FORMAT_51CHN8
; break;
688 case 7: device
->Format
= AL_FORMAT_61CHN8
; break;
689 case 8: device
->Format
= AL_FORMAT_71CHN8
; break;
691 if((i
=psnd_pcm_hw_params_set_format(data
->pcmHandle
, p
, SND_PCM_FORMAT_U8
)) < 0)
696 /* set channels (implicitly sets frame bits) */
697 if(i
>= 0 && (i
=psnd_pcm_hw_params_set_channels(data
->pcmHandle
, p
, aluChannelsFromFormat(device
->Format
))) < 0)
699 switch(aluBytesFromFormat(device
->Format
))
701 case 1: device
->Format
= AL_FORMAT_STEREO8
; break;
702 case 2: device
->Format
= AL_FORMAT_STEREO16
; break;
703 case 4: device
->Format
= AL_FORMAT_STEREO_FLOAT32
; break;
705 if((i
=psnd_pcm_hw_params_set_channels(data
->pcmHandle
, p
, 2)) < 0)
707 switch(aluBytesFromFormat(device
->Format
))
709 case 1: device
->Format
= AL_FORMAT_MONO8
; break;
710 case 2: device
->Format
= AL_FORMAT_MONO16
; break;
711 case 4: device
->Format
= AL_FORMAT_MONO_FLOAT32
; break;
713 if((i
=psnd_pcm_hw_params_set_channels(data
->pcmHandle
, p
, 1)) < 0)
714 err
= "set channels";
717 if(i
>= 0 && (i
=psnd_pcm_hw_params_set_rate_resample(data
->pcmHandle
, p
, 0)) < 0)
719 AL_PRINT("Failed to disable ALSA resampler\n");
722 /* set rate (implicitly constrains period/buffer parameters) */
723 if(i
>= 0 && (i
=psnd_pcm_hw_params_set_rate_near(data
->pcmHandle
, p
, &rate
, NULL
)) < 0)
724 err
= "set rate near";
725 /* set buffer time (implicitly constrains period/buffer parameters) */
726 bufferLen
= periodLen
* periods
;
727 if(i
>= 0 && (i
=psnd_pcm_hw_params_set_buffer_time_near(data
->pcmHandle
, p
, &bufferLen
, NULL
)) < 0)
728 err
= "set buffer time near";
729 /* set period time in frame units (implicitly sets buffer size/bytes/time and period size/bytes) */
730 if(i
>= 0 && (i
=psnd_pcm_hw_params_set_period_time_near(data
->pcmHandle
, p
, &periodLen
, NULL
)) < 0)
731 err
= "set period time near";
732 /* install and prepare hardware configuration */
733 if(i
>= 0 && (i
=psnd_pcm_hw_params(data
->pcmHandle
, p
)) < 0)
735 if(i
>= 0 && (i
=psnd_pcm_hw_params_get_access(p
, &access
)) < 0)
737 if(i
>= 0 && (i
=psnd_pcm_hw_params_get_period_size(p
, &periodSizeInFrames
, NULL
)) < 0)
738 err
= "get period size";
739 if(i
>= 0 && (i
=psnd_pcm_hw_params_get_periods(p
, &periods
, NULL
)) < 0)
743 AL_PRINT("%s failed: %s\n", err
, psnd_strerror(i
));
744 psnd_pcm_hw_params_free(p
);
748 psnd_pcm_hw_params_free(p
);
751 psnd_pcm_sw_params_malloc(&sp
);
753 if((i
=psnd_pcm_sw_params_current(data
->pcmHandle
, sp
)) != 0)
755 if(i
== 0 && (i
=psnd_pcm_sw_params_set_avail_min(data
->pcmHandle
, sp
, periodSizeInFrames
)) != 0)
756 err
= "sw set avail min";
757 if(i
== 0 && (i
=psnd_pcm_sw_params(data
->pcmHandle
, sp
)) != 0)
758 err
= "sw set params";
761 AL_PRINT("%s failed: %s\n", err
, psnd_strerror(i
));
762 psnd_pcm_sw_params_free(sp
);
766 psnd_pcm_sw_params_free(sp
);
768 SetDefaultChannelOrder(device
);
770 data
->size
= psnd_pcm_frames_to_bytes(data
->pcmHandle
, periodSizeInFrames
);
771 if(access
== SND_PCM_ACCESS_RW_INTERLEAVED
)
773 /* Increase periods by one, since the temp buffer counts as an extra
776 data
->buffer
= malloc(data
->size
);
779 AL_PRINT("buffer malloc failed\n");
782 device
->UpdateSize
= periodSizeInFrames
;
783 device
->NumUpdates
= periods
;
784 device
->Frequency
= rate
;
785 data
->thread
= StartThread(ALSANoMMapProc
, device
);
789 i
= psnd_pcm_prepare(data
->pcmHandle
);
792 AL_PRINT("prepare error: %s\n", psnd_strerror(i
));
795 device
->UpdateSize
= periodSizeInFrames
;
796 device
->NumUpdates
= periods
;
797 device
->Frequency
= rate
;
798 data
->thread
= StartThread(ALSAProc
, device
);
800 if(data
->thread
== NULL
)
802 AL_PRINT("Could not create playback thread\n");
811 static void alsa_stop_playback(ALCdevice
*device
)
813 alsa_data
*data
= (alsa_data
*)device
->ExtraData
;
818 StopThread(data
->thread
);
827 static ALCboolean
alsa_open_capture(ALCdevice
*pDevice
, const ALCchar
*deviceName
)
830 snd_pcm_hw_params_t
*p
;
831 snd_pcm_uframes_t bufferSizeInFrames
;
832 snd_pcm_format_t format
;
842 strncpy(driver
, GetConfigValue("alsa", "capture", "default"), sizeof(driver
)-1);
843 driver
[sizeof(driver
)-1] = 0;
845 if(!allCaptureDevNameMap
)
846 allCaptureDevNameMap
= probe_devices(SND_PCM_STREAM_CAPTURE
, &numCaptureDevNames
);
849 deviceName
= allCaptureDevNameMap
[0].name
;
854 for(idx
= 0;idx
< numCaptureDevNames
;idx
++)
856 if(allCaptureDevNameMap
[idx
].name
&&
857 strcmp(deviceName
, allCaptureDevNameMap
[idx
].name
) == 0)
859 devName
= allCaptureDevNameMap
[idx
].name
;
861 sprintf(driver
, "plughw:%d,%d", allCaptureDevNameMap
[idx
].card
, allCaptureDevNameMap
[idx
].dev
);
865 if(idx
== numCaptureDevNames
)
872 data
= (alsa_data
*)calloc(1, sizeof(alsa_data
));
874 i
= psnd_pcm_open(&data
->pcmHandle
, driver
, SND_PCM_STREAM_CAPTURE
, SND_PCM_NONBLOCK
);
878 i
= psnd_pcm_open(&data
->pcmHandle
, driver
, SND_PCM_STREAM_CAPTURE
, SND_PCM_NONBLOCK
);
882 i
= psnd_pcm_nonblock(data
->pcmHandle
, 0);
884 psnd_pcm_close(data
->pcmHandle
);
888 AL_PRINT("Could not open capture device '%s': %s\n", driver
, psnd_strerror(i
));
894 switch(aluBytesFromFormat(pDevice
->Format
))
897 format
= SND_PCM_FORMAT_U8
;
900 format
= SND_PCM_FORMAT_S16
;
903 format
= SND_PCM_FORMAT_FLOAT
;
906 AL_PRINT("Unknown format: 0x%x\n", pDevice
->Format
);
911 bufferSizeInFrames
= pDevice
->UpdateSize
* pDevice
->NumUpdates
;
912 psnd_pcm_hw_params_malloc(&p
);
914 if((i
=psnd_pcm_hw_params_any(data
->pcmHandle
, p
)) < 0)
916 /* set interleaved access */
917 if(i
>= 0 && (i
=psnd_pcm_hw_params_set_access(data
->pcmHandle
, p
, SND_PCM_ACCESS_RW_INTERLEAVED
)) < 0)
919 /* set format (implicitly sets sample bits) */
920 if(i
>= 0 && (i
=psnd_pcm_hw_params_set_format(data
->pcmHandle
, p
, format
)) < 0)
922 /* set channels (implicitly sets frame bits) */
923 if(i
>= 0 && (i
=psnd_pcm_hw_params_set_channels(data
->pcmHandle
, p
, aluChannelsFromFormat(pDevice
->Format
))) < 0)
924 err
= "set channels";
925 /* set rate (implicitly constrains period/buffer parameters) */
926 if(i
>= 0 && (i
=psnd_pcm_hw_params_set_rate(data
->pcmHandle
, p
, pDevice
->Frequency
, 0)) < 0)
927 err
= "set rate near";
928 /* set buffer size in frame units (implicitly sets period size/bytes/time and buffer time/bytes) */
929 if(i
>= 0 && (i
=psnd_pcm_hw_params_set_buffer_size_near(data
->pcmHandle
, p
, &bufferSizeInFrames
)) < 0)
930 err
= "set buffer size near";
931 /* install and prepare hardware configuration */
932 if(i
>= 0 && (i
=psnd_pcm_hw_params(data
->pcmHandle
, p
)) < 0)
936 AL_PRINT("%s failed: %s\n", err
, psnd_strerror(i
));
937 psnd_pcm_hw_params_free(p
);
941 if((i
=psnd_pcm_hw_params_get_period_size(p
, &bufferSizeInFrames
, NULL
)) < 0)
943 AL_PRINT("get size failed: %s\n", psnd_strerror(i
));
944 psnd_pcm_hw_params_free(p
);
948 psnd_pcm_hw_params_free(p
);
950 frameSize
= aluChannelsFromFormat(pDevice
->Format
);
951 frameSize
*= aluBytesFromFormat(pDevice
->Format
);
953 data
->ring
= CreateRingBuffer(frameSize
, pDevice
->UpdateSize
*pDevice
->NumUpdates
);
956 AL_PRINT("ring buffer create failed\n");
960 data
->size
= psnd_pcm_frames_to_bytes(data
->pcmHandle
, bufferSizeInFrames
);
961 data
->buffer
= malloc(data
->size
);
964 AL_PRINT("buffer malloc failed\n");
968 pDevice
->ExtraData
= data
;
969 data
->thread
= StartThread(ALSANoMMapCaptureProc
, pDevice
);
970 if(data
->thread
== NULL
)
972 AL_PRINT("Could not create capture thread\n");
976 pDevice
->szDeviceName
= strdup(deviceName
);
981 DestroyRingBuffer(data
->ring
);
982 psnd_pcm_close(data
->pcmHandle
);
986 pDevice
->ExtraData
= NULL
;
990 static void alsa_close_capture(ALCdevice
*pDevice
)
992 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
995 StopThread(data
->thread
);
997 psnd_pcm_close(data
->pcmHandle
);
998 DestroyRingBuffer(data
->ring
);
1002 pDevice
->ExtraData
= NULL
;
1007 static void alsa_start_capture(ALCdevice
*pDevice
)
1009 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
1010 data
->doCapture
= 1;
1013 static void alsa_stop_capture(ALCdevice
*pDevice
)
1015 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
1016 data
->doCapture
= 0;
1019 static void alsa_capture_samples(ALCdevice
*pDevice
, ALCvoid
*pBuffer
, ALCuint lSamples
)
1021 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
1023 if(lSamples
<= (ALCuint
)RingBufferSize(data
->ring
))
1024 ReadRingBuffer(data
->ring
, pBuffer
, lSamples
);
1026 alcSetError(pDevice
, ALC_INVALID_VALUE
);
1029 static ALCuint
alsa_available_samples(ALCdevice
*pDevice
)
1031 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
1032 return RingBufferSize(data
->ring
);
1036 BackendFuncs alsa_funcs
= {
1038 alsa_close_playback
,
1039 alsa_reset_playback
,
1045 alsa_capture_samples
,
1046 alsa_available_samples
1049 void alc_alsa_init(BackendFuncs
*func_list
)
1051 *func_list
= alsa_funcs
;
1054 void alc_alsa_deinit(void)
1058 for(i
= 0;i
< numDevNames
;++i
)
1059 free(allDevNameMap
[i
].name
);
1060 free(allDevNameMap
);
1061 allDevNameMap
= NULL
;
1064 for(i
= 0;i
< numCaptureDevNames
;++i
)
1065 free(allCaptureDevNameMap
[i
].name
);
1066 free(allCaptureDevNameMap
);
1067 allCaptureDevNameMap
= NULL
;
1068 numCaptureDevNames
= 0;
1071 void alc_alsa_probe(int type
)
1078 if(type
== DEVICE_PROBE
)
1079 AppendDeviceList(alsaDevice
);
1080 else if(type
== ALL_DEVICE_PROBE
)
1082 for(i
= 0;i
< numDevNames
;++i
)
1083 free(allDevNameMap
[i
].name
);
1085 free(allDevNameMap
);
1086 allDevNameMap
= probe_devices(SND_PCM_STREAM_PLAYBACK
, &numDevNames
);
1088 for(i
= 0;i
< numDevNames
;++i
)
1089 AppendAllDeviceList(allDevNameMap
[i
].name
);
1091 else if(type
== CAPTURE_DEVICE_PROBE
)
1093 for(i
= 0;i
< numCaptureDevNames
;++i
)
1094 free(allCaptureDevNameMap
[i
].name
);
1096 free(allCaptureDevNameMap
);
1097 allCaptureDevNameMap
= probe_devices(SND_PCM_STREAM_CAPTURE
, &numCaptureDevNames
);
1099 for(i
= 0;i
< numCaptureDevNames
;++i
)
1100 AppendCaptureDeviceList(allCaptureDevNameMap
[i
].name
);