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_recover
);
96 MAKE_FUNC(snd_pcm_info_malloc
);
97 MAKE_FUNC(snd_pcm_info_free
);
98 MAKE_FUNC(snd_pcm_info_set_device
);
99 MAKE_FUNC(snd_pcm_info_set_subdevice
);
100 MAKE_FUNC(snd_pcm_info_set_stream
);
101 MAKE_FUNC(snd_pcm_info_get_name
);
102 MAKE_FUNC(snd_ctl_pcm_next_device
);
103 MAKE_FUNC(snd_ctl_pcm_info
);
104 MAKE_FUNC(snd_ctl_open
);
105 MAKE_FUNC(snd_ctl_close
);
106 MAKE_FUNC(snd_ctl_card_info_malloc
);
107 MAKE_FUNC(snd_ctl_card_info_free
);
108 MAKE_FUNC(snd_ctl_card_info
);
109 MAKE_FUNC(snd_ctl_card_info_get_name
);
110 MAKE_FUNC(snd_card_next
);
114 static const ALCchar alsaDevice
[] = "ALSA Software";
115 static DevMap
*allDevNameMap
;
116 static ALuint numDevNames
;
117 static DevMap
*allCaptureDevNameMap
;
118 static ALuint numCaptureDevNames
;
119 static volatile ALuint load_count
;
122 void *alsa_load(void)
129 alsa_handle
= dlopen("libasound.so.2", RTLD_NOW
);
134 #define LOAD_FUNC(f) do { \
135 p##f = dlsym(alsa_handle, #f); \
136 if((str=dlerror()) != NULL) \
138 dlclose(alsa_handle); \
139 alsa_handle = NULL; \
140 AL_PRINT("Could not load %s from libasound.so.2: %s\n", #f, str); \
146 alsa_handle
= (void*)0xDEADBEEF;
147 #define LOAD_FUNC(f) p##f = f
150 LOAD_FUNC(snd_strerror
);
151 LOAD_FUNC(snd_pcm_open
);
152 LOAD_FUNC(snd_pcm_close
);
153 LOAD_FUNC(snd_pcm_nonblock
);
154 LOAD_FUNC(snd_pcm_frames_to_bytes
);
155 LOAD_FUNC(snd_pcm_hw_params_malloc
);
156 LOAD_FUNC(snd_pcm_hw_params_free
);
157 LOAD_FUNC(snd_pcm_hw_params_any
);
158 LOAD_FUNC(snd_pcm_hw_params_set_access
);
159 LOAD_FUNC(snd_pcm_hw_params_set_format
);
160 LOAD_FUNC(snd_pcm_hw_params_set_channels
);
161 LOAD_FUNC(snd_pcm_hw_params_set_periods_near
);
162 LOAD_FUNC(snd_pcm_hw_params_set_rate_near
);
163 LOAD_FUNC(snd_pcm_hw_params_set_rate
);
164 LOAD_FUNC(snd_pcm_hw_params_set_buffer_size_near
);
165 LOAD_FUNC(snd_pcm_hw_params_set_buffer_size_min
);
166 LOAD_FUNC(snd_pcm_hw_params_set_period_size_near
);
167 LOAD_FUNC(snd_pcm_hw_params_get_buffer_size
);
168 LOAD_FUNC(snd_pcm_hw_params_get_period_size
);
169 LOAD_FUNC(snd_pcm_hw_params_get_access
);
170 LOAD_FUNC(snd_pcm_hw_params_get_periods
);
171 LOAD_FUNC(snd_pcm_hw_params
);
172 LOAD_FUNC(snd_pcm_sw_params_malloc
);
173 LOAD_FUNC(snd_pcm_sw_params_current
);
174 LOAD_FUNC(snd_pcm_sw_params_set_avail_min
);
175 LOAD_FUNC(snd_pcm_sw_params
);
176 LOAD_FUNC(snd_pcm_sw_params_free
);
177 LOAD_FUNC(snd_pcm_prepare
);
178 LOAD_FUNC(snd_pcm_start
);
179 LOAD_FUNC(snd_pcm_resume
);
180 LOAD_FUNC(snd_pcm_wait
);
181 LOAD_FUNC(snd_pcm_state
);
182 LOAD_FUNC(snd_pcm_avail_update
);
183 LOAD_FUNC(snd_pcm_areas_silence
);
184 LOAD_FUNC(snd_pcm_mmap_begin
);
185 LOAD_FUNC(snd_pcm_mmap_commit
);
186 LOAD_FUNC(snd_pcm_readi
);
187 LOAD_FUNC(snd_pcm_writei
);
188 LOAD_FUNC(snd_pcm_drain
);
189 LOAD_FUNC(snd_pcm_recover
);
191 LOAD_FUNC(snd_pcm_info_malloc
);
192 LOAD_FUNC(snd_pcm_info_free
);
193 LOAD_FUNC(snd_pcm_info_set_device
);
194 LOAD_FUNC(snd_pcm_info_set_subdevice
);
195 LOAD_FUNC(snd_pcm_info_set_stream
);
196 LOAD_FUNC(snd_pcm_info_get_name
);
197 LOAD_FUNC(snd_ctl_pcm_next_device
);
198 LOAD_FUNC(snd_ctl_pcm_info
);
199 LOAD_FUNC(snd_ctl_open
);
200 LOAD_FUNC(snd_ctl_close
);
201 LOAD_FUNC(snd_ctl_card_info_malloc
);
202 LOAD_FUNC(snd_ctl_card_info_free
);
203 LOAD_FUNC(snd_ctl_card_info
);
204 LOAD_FUNC(snd_ctl_card_info_get_name
);
205 LOAD_FUNC(snd_card_next
);
214 void alsa_unload(void)
216 if(load_count
== 0 || --load_count
> 0)
220 dlclose(alsa_handle
);
226 static int xrun_recovery(snd_pcm_t
*handle
, int err
)
228 if(err
== -EINTR
|| err
== -EPIPE
|| err
== -ESTRPIPE
)
230 err
= psnd_pcm_recover(handle
, err
, 1);
232 err
= psnd_pcm_prepare(handle
);
234 AL_PRINT("recover failed: %s\n", psnd_strerror(err
));
239 static int verify_state(snd_pcm_t
*handle
)
241 snd_pcm_state_t state
= psnd_pcm_state(handle
);
242 if(state
== SND_PCM_STATE_DISCONNECTED
)
244 if(state
== SND_PCM_STATE_XRUN
)
246 int err
= xrun_recovery(handle
, -EPIPE
);
247 if(err
< 0) return err
;
249 else if(state
== SND_PCM_STATE_SUSPENDED
)
251 int err
= xrun_recovery(handle
, -ESTRPIPE
);
252 if(err
< 0) return err
;
259 static ALuint
ALSAProc(ALvoid
*ptr
)
261 ALCdevice
*pDevice
= (ALCdevice
*)ptr
;
262 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
263 const snd_pcm_channel_area_t
*areas
= NULL
;
264 snd_pcm_sframes_t avail
, commitres
;
265 snd_pcm_uframes_t offset
, frames
;
269 EnableRTPrio(RTPrioLevel
);
271 while(!data
->killNow
)
273 int state
= verify_state(data
->pcmHandle
);
276 AL_PRINT("Invalid state detected: %s\n", psnd_strerror(state
));
277 aluHandleDisconnect(pDevice
);
281 avail
= psnd_pcm_avail_update(data
->pcmHandle
);
284 AL_PRINT("available update failed: %s\n", psnd_strerror(avail
));
288 // make sure there's frames to process
289 if((snd_pcm_uframes_t
)avail
< pDevice
->UpdateSize
)
291 if(state
!= SND_PCM_STATE_RUNNING
)
293 err
= psnd_pcm_start(data
->pcmHandle
);
296 AL_PRINT("start failed: %s\n", psnd_strerror(err
));
300 if(psnd_pcm_wait(data
->pcmHandle
, 1000) == 0)
301 AL_PRINT("Wait timeout... buffer size too low?\n");
304 avail
-= avail
%pDevice
->UpdateSize
;
306 // it is possible that contiguous areas are smaller, thus we use a loop
311 err
= psnd_pcm_mmap_begin(data
->pcmHandle
, &areas
, &offset
, &frames
);
314 AL_PRINT("mmap begin error: %s\n", psnd_strerror(err
));
318 WritePtr
= (char*)areas
->addr
+ (offset
* areas
->step
/ 8);
319 aluMixData(pDevice
, WritePtr
, frames
);
321 commitres
= psnd_pcm_mmap_commit(data
->pcmHandle
, offset
, frames
);
322 if(commitres
< 0 || (commitres
-frames
) != 0)
324 AL_PRINT("mmap commit error: %s\n",
325 psnd_strerror(commitres
>= 0 ? -EPIPE
: commitres
));
336 static ALuint
ALSANoMMapProc(ALvoid
*ptr
)
338 ALCdevice
*pDevice
= (ALCdevice
*)ptr
;
339 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
340 snd_pcm_sframes_t avail
;
343 EnableRTPrio(RTPrioLevel
);
345 while(!data
->killNow
)
347 int state
= verify_state(data
->pcmHandle
);
350 AL_PRINT("Invalid state detected: %s\n", psnd_strerror(state
));
351 aluHandleDisconnect(pDevice
);
355 WritePtr
= data
->buffer
;
356 avail
= data
->size
/ psnd_pcm_frames_to_bytes(data
->pcmHandle
, 1);
357 aluMixData(pDevice
, WritePtr
, avail
);
361 int ret
= psnd_pcm_writei(data
->pcmHandle
, WritePtr
, avail
);
369 ret
= psnd_pcm_recover(data
->pcmHandle
, ret
, 1);
371 psnd_pcm_prepare(data
->pcmHandle
);
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 EnableRTPrio(RTPrioLevel
);
401 while(!data
->killNow
)
403 int state
= verify_state(data
->pcmHandle
);
406 AL_PRINT("Invalid state detected: %s\n", psnd_strerror(state
));
407 aluHandleDisconnect(pDevice
);
411 avail
= (snd_pcm_uframes_t
)data
->size
/ psnd_pcm_frames_to_bytes(data
->pcmHandle
, 1);
412 avail
= psnd_pcm_readi(data
->pcmHandle
, data
->buffer
, avail
);
420 avail
= psnd_pcm_recover(data
->pcmHandle
, avail
, 1);
422 psnd_pcm_prepare(data
->pcmHandle
);
425 if (avail
>= 0 && data
->doCapture
)
426 WriteRingBuffer(data
->ring
, data
->buffer
, avail
);
431 avail
= psnd_pcm_prepare(data
->pcmHandle
);
433 AL_PRINT("prepare error: %s\n", psnd_strerror(avail
));
440 static ALCboolean
alsa_open_playback(ALCdevice
*device
, const ALCchar
*deviceName
)
446 strncpy(driver
, GetConfigValue("alsa", "device", "default"), sizeof(driver
)-1);
447 driver
[sizeof(driver
)-1] = 0;
449 deviceName
= alsaDevice
;
450 else if(strcmp(deviceName
, alsaDevice
) != 0)
454 for(idx
= 0;idx
< numDevNames
;idx
++)
456 if(allDevNameMap
[idx
].name
&&
457 strcmp(deviceName
, allDevNameMap
[idx
].name
) == 0)
460 sprintf(driver
, "hw:%d,%d", allDevNameMap
[idx
].card
, allDevNameMap
[idx
].dev
);
464 if(idx
== numDevNames
)
471 data
= (alsa_data
*)calloc(1, sizeof(alsa_data
));
473 i
= psnd_pcm_open(&data
->pcmHandle
, driver
, SND_PCM_STREAM_PLAYBACK
, SND_PCM_NONBLOCK
);
477 i
= psnd_pcm_open(&data
->pcmHandle
, driver
, SND_PCM_STREAM_PLAYBACK
, SND_PCM_NONBLOCK
);
481 i
= psnd_pcm_nonblock(data
->pcmHandle
, 0);
483 psnd_pcm_close(data
->pcmHandle
);
488 AL_PRINT("Could not open playback device '%s': %s\n", driver
, psnd_strerror(i
));
493 device
->szDeviceName
= strdup(deviceName
);
494 device
->ExtraData
= data
;
498 static void alsa_close_playback(ALCdevice
*device
)
500 alsa_data
*data
= (alsa_data
*)device
->ExtraData
;
502 psnd_pcm_close(data
->pcmHandle
);
504 device
->ExtraData
= NULL
;
509 static ALCboolean
alsa_reset_playback(ALCdevice
*device
)
511 alsa_data
*data
= (alsa_data
*)device
->ExtraData
;
512 snd_pcm_uframes_t periodSizeInFrames
;
513 snd_pcm_sw_params_t
*sp
= NULL
;
514 snd_pcm_hw_params_t
*p
= NULL
;
515 snd_pcm_access_t access
;
516 snd_pcm_format_t format
;
517 unsigned int periods
;
524 switch(aluBytesFromFormat(device
->Format
))
527 format
= SND_PCM_FORMAT_U8
;
530 format
= SND_PCM_FORMAT_S16
;
533 format
= SND_PCM_FORMAT_FLOAT
;
536 AL_PRINT("Unknown format: 0x%x\n", device
->Format
);
540 allowmmap
= GetConfigValueBool("alsa", "mmap", 1);
541 periods
= device
->NumUpdates
;
542 periodSizeInFrames
= device
->UpdateSize
;
543 rate
= device
->Frequency
;
546 psnd_pcm_hw_params_malloc(&p
);
548 if((i
=psnd_pcm_hw_params_any(data
->pcmHandle
, p
)) < 0)
550 /* set interleaved access */
551 if(i
>= 0 && (!allowmmap
|| (i
=psnd_pcm_hw_params_set_access(data
->pcmHandle
, p
, SND_PCM_ACCESS_MMAP_INTERLEAVED
)) < 0))
553 if(periods
> 2) periods
--;
554 if((i
=psnd_pcm_hw_params_set_access(data
->pcmHandle
, p
, SND_PCM_ACCESS_RW_INTERLEAVED
)) < 0)
557 /* set format (implicitly sets sample bits) */
558 if(i
>= 0 && (i
=psnd_pcm_hw_params_set_format(data
->pcmHandle
, p
, format
)) < 0)
560 switch(aluChannelsFromFormat(device
->Format
))
562 case 1: device
->Format
= AL_FORMAT_MONO_FLOAT32
; break;
563 case 2: device
->Format
= AL_FORMAT_STEREO_FLOAT32
; break;
564 case 4: device
->Format
= AL_FORMAT_QUAD32
; break;
565 case 6: device
->Format
= AL_FORMAT_51CHN32
; break;
566 case 7: device
->Format
= AL_FORMAT_61CHN32
; break;
567 case 8: device
->Format
= AL_FORMAT_71CHN32
; break;
569 if((i
=psnd_pcm_hw_params_set_format(data
->pcmHandle
, p
, SND_PCM_FORMAT_FLOAT
)) < 0)
571 switch(aluChannelsFromFormat(device
->Format
))
573 case 1: device
->Format
= AL_FORMAT_MONO16
; break;
574 case 2: device
->Format
= AL_FORMAT_STEREO16
; break;
575 case 4: device
->Format
= AL_FORMAT_QUAD16
; break;
576 case 6: device
->Format
= AL_FORMAT_51CHN16
; break;
577 case 7: device
->Format
= AL_FORMAT_61CHN16
; break;
578 case 8: device
->Format
= AL_FORMAT_71CHN16
; break;
580 if((i
=psnd_pcm_hw_params_set_format(data
->pcmHandle
, p
, SND_PCM_FORMAT_S16
)) < 0)
582 switch(aluChannelsFromFormat(device
->Format
))
584 case 1: device
->Format
= AL_FORMAT_MONO8
; break;
585 case 2: device
->Format
= AL_FORMAT_STEREO8
; break;
586 case 4: device
->Format
= AL_FORMAT_QUAD8
; break;
587 case 6: device
->Format
= AL_FORMAT_51CHN8
; break;
588 case 7: device
->Format
= AL_FORMAT_61CHN8
; break;
589 case 8: device
->Format
= AL_FORMAT_71CHN8
; break;
591 if((i
=psnd_pcm_hw_params_set_format(data
->pcmHandle
, p
, SND_PCM_FORMAT_U8
)) < 0)
596 /* set channels (implicitly sets frame bits) */
597 if(i
>= 0 && (i
=psnd_pcm_hw_params_set_channels(data
->pcmHandle
, p
, aluChannelsFromFormat(device
->Format
))) < 0)
599 switch(aluBytesFromFormat(device
->Format
))
601 case 1: device
->Format
= AL_FORMAT_STEREO8
; break;
602 case 2: device
->Format
= AL_FORMAT_STEREO16
; break;
603 case 4: device
->Format
= AL_FORMAT_STEREO_FLOAT32
; break;
605 if((i
=psnd_pcm_hw_params_set_channels(data
->pcmHandle
, p
, 2)) < 0)
607 switch(aluBytesFromFormat(device
->Format
))
609 case 1: device
->Format
= AL_FORMAT_MONO8
; break;
610 case 2: device
->Format
= AL_FORMAT_MONO16
; break;
611 case 4: device
->Format
= AL_FORMAT_MONO_FLOAT32
; break;
613 if((i
=psnd_pcm_hw_params_set_channels(data
->pcmHandle
, p
, 1)) < 0)
614 err
= "set channels";
617 /* set periods (implicitly constrains period/buffer parameters) */
618 if(i
>= 0 && (i
=psnd_pcm_hw_params_set_periods_near(data
->pcmHandle
, p
, &periods
, NULL
)) < 0)
619 err
= "set periods near";
620 /* set rate (implicitly constrains period/buffer parameters) */
621 if(i
>= 0 && (i
=psnd_pcm_hw_params_set_rate_near(data
->pcmHandle
, p
, &rate
, NULL
)) < 0)
622 err
= "set rate near";
623 /* set period size in frame units (implicitly sets buffer size/bytes/time and period time/bytes) */
624 if(i
>= 0 && (i
=psnd_pcm_hw_params_set_period_size_near(data
->pcmHandle
, p
, &periodSizeInFrames
, NULL
)) < 0)
625 err
= "set period size near";
626 /* install and prepare hardware configuration */
627 if(i
>= 0 && (i
=psnd_pcm_hw_params(data
->pcmHandle
, p
)) < 0)
629 if(i
>= 0 && (i
=psnd_pcm_hw_params_get_access(p
, &access
)) < 0)
631 if(i
>= 0 && (i
=psnd_pcm_hw_params_get_period_size(p
, &periodSizeInFrames
, NULL
)) < 0)
632 err
= "get period size";
633 if(i
>= 0 && (i
=psnd_pcm_hw_params_get_periods(p
, &periods
, NULL
)) < 0)
637 AL_PRINT("%s failed: %s\n", err
, psnd_strerror(i
));
638 psnd_pcm_hw_params_free(p
);
642 psnd_pcm_hw_params_free(p
);
645 psnd_pcm_sw_params_malloc(&sp
);
647 if((i
=psnd_pcm_sw_params_current(data
->pcmHandle
, sp
)) != 0)
649 if(i
== 0 && (i
=psnd_pcm_sw_params_set_avail_min(data
->pcmHandle
, sp
, periodSizeInFrames
)) != 0)
650 err
= "sw set avail min";
651 if(i
== 0 && (i
=psnd_pcm_sw_params(data
->pcmHandle
, sp
)) != 0)
652 err
= "sw set params";
655 AL_PRINT("%s failed: %s\n", err
, psnd_strerror(i
));
656 psnd_pcm_sw_params_free(sp
);
660 psnd_pcm_sw_params_free(sp
);
662 SetDefaultChannelOrder(device
);
664 data
->size
= psnd_pcm_frames_to_bytes(data
->pcmHandle
, periodSizeInFrames
);
665 if(access
== SND_PCM_ACCESS_RW_INTERLEAVED
)
667 /* Increase periods by one, since the temp buffer counts as an extra
670 data
->buffer
= malloc(data
->size
);
673 AL_PRINT("buffer malloc failed\n");
676 device
->UpdateSize
= periodSizeInFrames
;
677 device
->NumUpdates
= periods
;
678 device
->Frequency
= rate
;
679 data
->thread
= StartThread(ALSANoMMapProc
, device
);
683 i
= psnd_pcm_prepare(data
->pcmHandle
);
686 AL_PRINT("prepare error: %s\n", psnd_strerror(i
));
689 device
->UpdateSize
= periodSizeInFrames
;
690 device
->NumUpdates
= periods
;
691 device
->Frequency
= rate
;
692 data
->thread
= StartThread(ALSAProc
, device
);
694 if(data
->thread
== NULL
)
696 AL_PRINT("Could not create playback thread\n");
705 static void alsa_stop_playback(ALCdevice
*device
)
707 alsa_data
*data
= (alsa_data
*)device
->ExtraData
;
712 StopThread(data
->thread
);
721 static ALCboolean
alsa_open_capture(ALCdevice
*pDevice
, const ALCchar
*deviceName
)
724 snd_pcm_hw_params_t
*p
;
725 snd_pcm_uframes_t bufferSizeInFrames
;
726 snd_pcm_format_t format
;
733 strncpy(driver
, GetConfigValue("alsa", "capture", "default"), sizeof(driver
)-1);
734 driver
[sizeof(driver
)-1] = 0;
736 deviceName
= allCaptureDevNameMap
[0].name
;
741 for(idx
= 0;idx
< numCaptureDevNames
;idx
++)
743 if(allCaptureDevNameMap
[idx
].name
&&
744 strcmp(deviceName
, allCaptureDevNameMap
[idx
].name
) == 0)
746 devName
= allCaptureDevNameMap
[idx
].name
;
748 sprintf(driver
, "plughw:%d,%d", allCaptureDevNameMap
[idx
].card
, allCaptureDevNameMap
[idx
].dev
);
752 if(idx
== numCaptureDevNames
)
759 data
= (alsa_data
*)calloc(1, sizeof(alsa_data
));
761 i
= psnd_pcm_open(&data
->pcmHandle
, driver
, SND_PCM_STREAM_CAPTURE
, SND_PCM_NONBLOCK
);
765 i
= psnd_pcm_open(&data
->pcmHandle
, driver
, SND_PCM_STREAM_CAPTURE
, SND_PCM_NONBLOCK
);
769 i
= psnd_pcm_nonblock(data
->pcmHandle
, 0);
771 psnd_pcm_close(data
->pcmHandle
);
775 AL_PRINT("Could not open capture device '%s': %s\n", driver
, psnd_strerror(i
));
781 switch(aluBytesFromFormat(pDevice
->Format
))
784 format
= SND_PCM_FORMAT_U8
;
787 format
= SND_PCM_FORMAT_S16
;
790 format
= SND_PCM_FORMAT_FLOAT
;
793 AL_PRINT("Unknown format: 0x%x\n", pDevice
->Format
);
798 bufferSizeInFrames
= pDevice
->UpdateSize
* pDevice
->NumUpdates
;
799 psnd_pcm_hw_params_malloc(&p
);
801 if((i
=psnd_pcm_hw_params_any(data
->pcmHandle
, p
)) < 0)
803 /* set interleaved access */
804 if(i
>= 0 && (i
=psnd_pcm_hw_params_set_access(data
->pcmHandle
, p
, SND_PCM_ACCESS_RW_INTERLEAVED
)) < 0)
806 /* set format (implicitly sets sample bits) */
807 if(i
>= 0 && (i
=psnd_pcm_hw_params_set_format(data
->pcmHandle
, p
, format
)) < 0)
809 /* set channels (implicitly sets frame bits) */
810 if(i
>= 0 && (i
=psnd_pcm_hw_params_set_channels(data
->pcmHandle
, p
, aluChannelsFromFormat(pDevice
->Format
))) < 0)
811 err
= "set channels";
812 /* set rate (implicitly constrains period/buffer parameters) */
813 if(i
>= 0 && (i
=psnd_pcm_hw_params_set_rate(data
->pcmHandle
, p
, pDevice
->Frequency
, 0)) < 0)
814 err
= "set rate near";
815 /* set buffer size in frame units (implicitly sets period size/bytes/time and buffer time/bytes) */
816 if(i
>= 0 && (i
=psnd_pcm_hw_params_set_buffer_size_near(data
->pcmHandle
, p
, &bufferSizeInFrames
)) < 0)
817 err
= "set buffer size near";
818 /* install and prepare hardware configuration */
819 if(i
>= 0 && (i
=psnd_pcm_hw_params(data
->pcmHandle
, p
)) < 0)
823 AL_PRINT("%s failed: %s\n", err
, psnd_strerror(i
));
824 psnd_pcm_hw_params_free(p
);
828 if((i
=psnd_pcm_hw_params_get_period_size(p
, &bufferSizeInFrames
, NULL
)) < 0)
830 AL_PRINT("get size failed: %s\n", psnd_strerror(i
));
831 psnd_pcm_hw_params_free(p
);
835 psnd_pcm_hw_params_free(p
);
837 frameSize
= aluChannelsFromFormat(pDevice
->Format
);
838 frameSize
*= aluBytesFromFormat(pDevice
->Format
);
840 data
->ring
= CreateRingBuffer(frameSize
, pDevice
->UpdateSize
*pDevice
->NumUpdates
);
843 AL_PRINT("ring buffer create failed\n");
847 data
->size
= psnd_pcm_frames_to_bytes(data
->pcmHandle
, bufferSizeInFrames
);
848 data
->buffer
= malloc(data
->size
);
851 AL_PRINT("buffer malloc failed\n");
855 pDevice
->ExtraData
= data
;
856 data
->thread
= StartThread(ALSANoMMapCaptureProc
, pDevice
);
857 if(data
->thread
== NULL
)
859 AL_PRINT("Could not create capture thread\n");
863 pDevice
->szDeviceName
= strdup(deviceName
);
868 DestroyRingBuffer(data
->ring
);
869 psnd_pcm_close(data
->pcmHandle
);
873 pDevice
->ExtraData
= NULL
;
877 static void alsa_close_capture(ALCdevice
*pDevice
)
879 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
882 StopThread(data
->thread
);
884 psnd_pcm_close(data
->pcmHandle
);
885 DestroyRingBuffer(data
->ring
);
889 pDevice
->ExtraData
= NULL
;
894 static void alsa_start_capture(ALCdevice
*pDevice
)
896 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
900 static void alsa_stop_capture(ALCdevice
*pDevice
)
902 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
906 static void alsa_capture_samples(ALCdevice
*pDevice
, ALCvoid
*pBuffer
, ALCuint lSamples
)
908 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
910 if(lSamples
<= (ALCuint
)RingBufferSize(data
->ring
))
911 ReadRingBuffer(data
->ring
, pBuffer
, lSamples
);
913 alcSetError(pDevice
, ALC_INVALID_VALUE
);
916 static ALCuint
alsa_available_samples(ALCdevice
*pDevice
)
918 alsa_data
*data
= (alsa_data
*)pDevice
->ExtraData
;
919 return RingBufferSize(data
->ring
);
923 BackendFuncs alsa_funcs
= {
932 alsa_capture_samples
,
933 alsa_available_samples
936 void alc_alsa_init(BackendFuncs
*func_list
)
938 *func_list
= alsa_funcs
;
941 void alc_alsa_deinit(void)
945 for(i
= 0;i
< numDevNames
;++i
)
946 free(allDevNameMap
[i
].name
);
948 allDevNameMap
= NULL
;
951 for(i
= 0;i
< numCaptureDevNames
;++i
)
952 free(allCaptureDevNameMap
[i
].name
);
953 free(allCaptureDevNameMap
);
954 allCaptureDevNameMap
= NULL
;
955 numCaptureDevNames
= 0;
958 void alc_alsa_probe(int type
)
961 int card
, err
, dev
, idx
;
962 snd_ctl_card_info_t
*info
;
963 snd_pcm_info_t
*pcminfo
;
964 snd_pcm_stream_t stream
;
971 psnd_ctl_card_info_malloc(&info
);
972 psnd_pcm_info_malloc(&pcminfo
);
975 if((err
=psnd_card_next(&card
)) < 0)
976 AL_PRINT("Failed to find a card: %s\n", psnd_strerror(err
));
978 if(type
== DEVICE_PROBE
)
979 AppendDeviceList(alsaDevice
);
980 else if(type
== ALL_DEVICE_PROBE
)
982 stream
= SND_PCM_STREAM_PLAYBACK
;
984 for(i
= 0;i
< numDevNames
;++i
)
985 free(allDevNameMap
[i
].name
);
987 allDevNameMap
= realloc(allDevNameMap
, sizeof(DevMap
) * 1);
988 allDevNameMap
[0].name
= strdup("ALSA Software on default");
989 AppendAllDeviceList(allDevNameMap
[0].name
);
993 sprintf(name
, "hw:%d", card
);
994 if ((err
= psnd_ctl_open(&handle
, name
, 0)) < 0) {
995 AL_PRINT("control open (%i): %s\n", card
, psnd_strerror(err
));
998 if ((err
= psnd_ctl_card_info(handle
, info
)) < 0) {
999 AL_PRINT("control hardware info (%i): %s\n", card
, psnd_strerror(err
));
1000 psnd_ctl_close(handle
);
1006 const char *cname
, *dname
;
1009 if (psnd_ctl_pcm_next_device(handle
, &dev
)<0)
1010 AL_PRINT("snd_ctl_pcm_next_device failed\n");
1014 psnd_pcm_info_set_device(pcminfo
, dev
);
1015 psnd_pcm_info_set_subdevice(pcminfo
, 0);
1016 psnd_pcm_info_set_stream(pcminfo
, stream
);
1017 if ((err
= psnd_ctl_pcm_info(handle
, pcminfo
)) < 0) {
1019 AL_PRINT("control digital audio info (%i): %s\n", card
, psnd_strerror(err
));
1023 temp
= realloc(allDevNameMap
, sizeof(DevMap
) * (idx
+1));
1026 allDevNameMap
= temp
;
1027 cname
= psnd_ctl_card_info_get_name(info
);
1028 dname
= psnd_pcm_info_get_name(pcminfo
);
1029 snprintf(name
, sizeof(name
), "ALSA Software on %s [%s] (hw:%d,%d)",
1030 cname
, dname
, card
, dev
);
1031 AppendAllDeviceList(name
);
1032 allDevNameMap
[idx
].name
= strdup(name
);
1033 allDevNameMap
[idx
].card
= card
;
1034 allDevNameMap
[idx
].dev
= dev
;
1038 psnd_ctl_close(handle
);
1040 if(psnd_card_next(&card
) < 0) {
1041 AL_PRINT("snd_card_next failed\n");
1047 else if(type
== CAPTURE_DEVICE_PROBE
)
1049 stream
= SND_PCM_STREAM_CAPTURE
;
1051 for(i
= 0;i
< numCaptureDevNames
;++i
)
1052 free(allCaptureDevNameMap
[i
].name
);
1054 allCaptureDevNameMap
= realloc(allCaptureDevNameMap
, sizeof(DevMap
) * 1);
1055 allCaptureDevNameMap
[0].name
= strdup("ALSA Capture on default");
1056 AppendCaptureDeviceList(allCaptureDevNameMap
[0].name
);
1060 sprintf(name
, "hw:%d", card
);
1062 if ((err
= psnd_ctl_open(&handle
, name
, 0)) < 0) {
1063 AL_PRINT("control open (%i): %s\n", card
, psnd_strerror(err
));
1065 if (err
>= 0 && (err
= psnd_ctl_card_info(handle
, info
)) < 0) {
1066 AL_PRINT("control hardware info (%i): %s\n", card
, psnd_strerror(err
));
1072 const char *cname
, *dname
;
1075 if (psnd_ctl_pcm_next_device(handle
, &dev
)<0)
1076 AL_PRINT("snd_ctl_pcm_next_device failed\n");
1079 psnd_pcm_info_set_device(pcminfo
, dev
);
1080 psnd_pcm_info_set_subdevice(pcminfo
, 0);
1081 psnd_pcm_info_set_stream(pcminfo
, stream
);
1082 if ((err
= psnd_ctl_pcm_info(handle
, pcminfo
)) < 0) {
1084 AL_PRINT("control digital audio info (%i): %s\n", card
, psnd_strerror(err
));
1088 temp
= realloc(allCaptureDevNameMap
, sizeof(DevMap
) * (idx
+1));
1091 allCaptureDevNameMap
= temp
;
1092 cname
= psnd_ctl_card_info_get_name(info
);
1093 dname
= psnd_pcm_info_get_name(pcminfo
);
1094 snprintf(name
, sizeof(name
), "ALSA Capture on %s [%s] (hw:%d,%d)",
1095 cname
, dname
, card
, dev
);
1096 AppendCaptureDeviceList(name
);
1097 allCaptureDevNameMap
[idx
].name
= strdup(name
);
1098 allCaptureDevNameMap
[idx
].card
= card
;
1099 allCaptureDevNameMap
[idx
].dev
= dev
;
1104 if(handle
) psnd_ctl_close(handle
);
1105 if(psnd_card_next(&card
) < 0) {
1106 AL_PRINT("snd_card_next failed\n");
1110 numCaptureDevNames
= idx
;
1113 psnd_pcm_info_free(pcminfo
);
1114 psnd_ctl_card_info_free(info
);