2 * OpenAL cross platform audio library
3 * Copyright (C) 2009 by Konstantinos Natsakis <konstantinos.natsakis@gmail.com>
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
28 #include <pulse/pulseaudio.h>
30 #if PA_API_VERSION == 11
31 #define PA_STREAM_ADJUST_LATENCY 0x2000U
32 static inline int PA_STREAM_IS_GOOD(pa_stream_state_t x
)
34 return (x
== PA_STREAM_CREATING
|| x
== PA_STREAM_READY
);
36 static inline int PA_CONTEXT_IS_GOOD(pa_context_state_t x
)
38 return (x
== PA_CONTEXT_CONNECTING
|| x
== PA_CONTEXT_AUTHORIZING
||
39 x
== PA_CONTEXT_SETTING_NAME
|| x
== PA_CONTEXT_READY
);
41 #define PA_STREAM_IS_GOOD PA_STREAM_IS_GOOD
42 #define PA_CONTEXT_IS_GOOD PA_CONTEXT_IS_GOOD
43 #elif PA_API_VERSION != 12
44 #error Invalid PulseAudio API version
47 static void *pa_handle
;
48 #define MAKE_FUNC(x) static typeof(x) * p##x
49 MAKE_FUNC(pa_context_unref
);
50 MAKE_FUNC(pa_sample_spec_valid
);
51 MAKE_FUNC(pa_stream_drop
);
52 MAKE_FUNC(pa_strerror
);
53 MAKE_FUNC(pa_context_get_state
);
54 MAKE_FUNC(pa_stream_get_state
);
55 MAKE_FUNC(pa_threaded_mainloop_signal
);
56 MAKE_FUNC(pa_stream_peek
);
57 MAKE_FUNC(pa_threaded_mainloop_wait
);
58 MAKE_FUNC(pa_threaded_mainloop_unlock
);
59 MAKE_FUNC(pa_context_new
);
60 MAKE_FUNC(pa_threaded_mainloop_stop
);
61 MAKE_FUNC(pa_context_disconnect
);
62 MAKE_FUNC(pa_threaded_mainloop_start
);
63 MAKE_FUNC(pa_threaded_mainloop_get_api
);
64 MAKE_FUNC(pa_context_set_state_callback
);
65 MAKE_FUNC(pa_stream_write
);
67 MAKE_FUNC(pa_stream_connect_record
);
68 MAKE_FUNC(pa_stream_connect_playback
);
69 MAKE_FUNC(pa_path_get_filename
);
70 MAKE_FUNC(pa_get_binary_name
);
71 MAKE_FUNC(pa_threaded_mainloop_free
);
72 MAKE_FUNC(pa_context_errno
);
73 MAKE_FUNC(pa_xmalloc0
);
74 MAKE_FUNC(pa_stream_unref
);
75 MAKE_FUNC(pa_threaded_mainloop_accept
);
76 MAKE_FUNC(pa_stream_set_write_callback
);
77 MAKE_FUNC(pa_threaded_mainloop_new
);
78 MAKE_FUNC(pa_context_connect
);
79 MAKE_FUNC(pa_stream_set_read_callback
);
80 MAKE_FUNC(pa_stream_set_state_callback
);
81 MAKE_FUNC(pa_stream_new
);
82 MAKE_FUNC(pa_stream_disconnect
);
83 MAKE_FUNC(pa_threaded_mainloop_lock
);
99 char path_name
[PATH_MAX
];
100 const char *context_name
;
101 const char *stream_name
;
103 pa_threaded_mainloop
*loop
;
109 static char *pulse_device
;
110 static char *pulse_capture_device
;
112 // PulseAudio Event Callbacks {{{
113 static void stream_state_callback(pa_stream
*stream
, void *pdata
) //{{{
115 pulse_data
*data
= pdata
;
117 switch(ppa_stream_get_state(stream
))
119 case PA_STREAM_READY
:
120 AL_PRINT("%s: %s ready!\n", data
->context_name
, data
->stream_name
);
123 case PA_STREAM_FAILED
:
124 AL_PRINT("%s: %s: Connection failed: %s\n", data
->context_name
,
125 data
->stream_name
, ppa_strerror(ppa_context_errno(data
->context
)));
128 case PA_STREAM_TERMINATED
:
129 AL_PRINT("%s: %s terminated!\n", data
->context_name
, data
->stream_name
);
136 ppa_threaded_mainloop_signal(data
->loop
, 1);
139 static void context_state_callback(pa_context
*context
, void *pdata
) //{{{
141 pulse_data
*data
= pdata
;
143 switch(ppa_context_get_state(context
))
145 case PA_CONTEXT_READY
:
146 AL_PRINT("%s ready!\n", data
->context_name
);
149 case PA_CONTEXT_FAILED
:
150 AL_PRINT("%s: Connection failed: %s\n", data
->context_name
,
151 ppa_strerror(ppa_context_errno(context
)));
154 case PA_CONTEXT_TERMINATED
:
155 AL_PRINT("%s terminated!\n", data
->context_name
);
162 ppa_threaded_mainloop_signal(data
->loop
, 1);
166 // PulseAudio I/O Callbacks //{{{
167 static void stream_write_callback(pa_stream
*stream
, size_t len
, void *pdata
) //{{{
169 ALCdevice
*Device
= pdata
;
170 void *buf
= ppa_xmalloc0(len
);
172 SuspendContext(NULL
);
173 aluMixData(Device
->Context
, buf
, len
, Device
->Format
);
174 ProcessContext(NULL
);
176 ppa_stream_write(stream
, buf
, len
, ppa_xfree
, 0, PA_SEEK_RELATIVE
);
179 static void stream_read_callback(pa_stream
*stream
, size_t length
, void *pdata
) //{{{
181 ALCdevice
*Device
= pdata
;
182 pulse_data
*data
= Device
->ExtraData
;
185 if(ppa_stream_peek(stream
, &buf
, &length
) < 0)
187 AL_PRINT("pa_stream_peek() failed: %s\n",
188 ppa_strerror(ppa_context_errno(data
->context
)));
195 length
/= data
->frame_size
;
197 if(data
->samples
< length
)
198 AL_PRINT("stream_read_callback: buffer overflow!\n");
200 WriteRingBuffer(data
->ring
, buf
, (length
<data
->samples
) ? length
: data
->samples
);
202 ppa_stream_drop(stream
);
206 static ALCboolean
pulse_open(ALCdevice
*device
, ALCchar
*device_name
, ALCenum format
, ALCuint samples
, ALCuint frequency
) //{{{
208 pulse_data
*data
= ppa_xmalloc0(sizeof(pulse_data
));
210 data
->device
= device
;
211 data
->format
= format
;
212 data
->samples
= samples
;
213 data
->frequency
= frequency
;
214 data
->frame_size
= aluBytesFromFormat(format
) * aluChannelsFromFormat(format
);
216 if(ppa_get_binary_name(data
->path_name
, sizeof(data
->path_name
)))
217 data
->context_name
= ppa_path_get_filename(data
->path_name
);
219 data
->context_name
= "OpenAL Soft";
221 if(!(data
->ring
= CreateRingBuffer(data
->frame_size
, data
->samples
)))
227 device
->ExtraData
= data
;
228 device
->szDeviceName
= device_name
;
230 data
->attr
.minreq
= -1;
231 data
->attr
.prebuf
= -1;
232 data
->attr
.maxlength
= -1;
234 if(device
->IsCaptureDevice
)
236 data
->attr
.tlength
= -1;
237 data
->attr
.fragsize
= data
->frame_size
* data
->samples
/ 2;
238 data
->stream_name
= "Capture Stream";
242 data
->attr
.tlength
= data
->frame_size
* (device
->UpdateSize
&~3);
243 data
->attr
.fragsize
= -1;
244 data
->stream_name
= "Playback Stream";
247 data
->spec
.rate
= data
->frequency
;
248 data
->spec
.channels
= aluChannelsFromFormat(data
->format
);
250 switch(aluBytesFromFormat(data
->format
))
253 data
->spec
.format
= PA_SAMPLE_U8
;
256 data
->spec
.format
= PA_SAMPLE_S16NE
;
259 AL_PRINT("Unknown format: %x\n", data
->format
);
263 if(ppa_sample_spec_valid(&data
->spec
) == 0)
265 AL_PRINT("Invalid sample format\n");
269 if(!(data
->loop
= ppa_threaded_mainloop_new()))
271 AL_PRINT("pa_threaded_mainloop_new() failed!\n");
275 if(ppa_threaded_mainloop_start(data
->loop
) < 0)
277 AL_PRINT("pa_threaded_mainloop_start() failed\n");
281 ppa_threaded_mainloop_lock(data
->loop
);
283 data
->context
= ppa_context_new(ppa_threaded_mainloop_get_api(data
->loop
), data
->context_name
);
286 AL_PRINT("pa_context_new() failed: %s\n",
287 ppa_strerror(ppa_context_errno(data
->context
)));
289 ppa_threaded_mainloop_unlock(data
->loop
);
293 ppa_context_set_state_callback(data
->context
, context_state_callback
, data
);
295 if(ppa_context_connect(data
->context
, NULL
, PA_CONTEXT_NOAUTOSPAWN
, NULL
) < 0)
297 AL_PRINT("Context did not connect: %s\n",
298 ppa_strerror(ppa_context_errno(data
->context
)));
300 ppa_context_unref(data
->context
);
301 ppa_threaded_mainloop_unlock(data
->loop
);
303 data
->context
= NULL
;
307 while(ppa_context_get_state(data
->context
) != PA_CONTEXT_READY
)
309 if(!PA_CONTEXT_IS_GOOD(ppa_context_get_state(data
->context
)))
311 ppa_context_unref(data
->context
);
312 ppa_threaded_mainloop_unlock(data
->loop
);
314 data
->context
= NULL
;
318 ppa_threaded_mainloop_wait(data
->loop
);
319 ppa_threaded_mainloop_accept(data
->loop
);
322 data
->stream
= ppa_stream_new(data
->context
, data
->stream_name
, &data
->spec
, NULL
);
325 AL_PRINT("pa_stream_new() failed: %s\n",
326 ppa_strerror(ppa_context_errno(data
->context
)));
328 ppa_threaded_mainloop_unlock(data
->loop
);
332 ppa_stream_set_state_callback(data
->stream
, stream_state_callback
, data
);
334 if(device
->IsCaptureDevice
)
336 if(ppa_stream_connect_record(data
->stream
, NULL
, &data
->attr
, PA_STREAM_ADJUST_LATENCY
) < 0)
338 AL_PRINT("Stream did not connect: %s\n",
339 ppa_strerror(ppa_context_errno(data
->context
)));
341 ppa_stream_unref(data
->stream
);
342 ppa_threaded_mainloop_unlock(data
->loop
);
350 ppa_stream_set_write_callback(data
->stream
, stream_write_callback
, device
);
352 if(ppa_stream_connect_playback(data
->stream
, NULL
, &data
->attr
, PA_STREAM_ADJUST_LATENCY
, NULL
, NULL
) < 0)
354 AL_PRINT("Stream did not connect: %s\n",
355 ppa_strerror(ppa_context_errno(data
->context
)));
357 ppa_stream_unref(data
->stream
);
358 ppa_threaded_mainloop_unlock(data
->loop
);
365 while(ppa_stream_get_state(data
->stream
) != PA_STREAM_READY
)
367 if(!PA_STREAM_IS_GOOD(ppa_stream_get_state(data
->stream
)))
369 ppa_stream_unref(data
->stream
);
370 ppa_threaded_mainloop_unlock(data
->loop
);
376 ppa_threaded_mainloop_wait(data
->loop
);
377 ppa_threaded_mainloop_accept(data
->loop
);
380 device
->UpdateSize
/= 4;
381 ppa_threaded_mainloop_unlock(data
->loop
);
386 ppa_threaded_mainloop_lock(data
->loop
);
388 ppa_context_disconnect(data
->context
);
389 ppa_context_unref(data
->context
);
391 ppa_threaded_mainloop_unlock(data
->loop
);
393 ppa_threaded_mainloop_stop(data
->loop
);
394 ppa_threaded_mainloop_free(data
->loop
);
396 device
->ExtraData
= NULL
;
397 device
->szDeviceName
= NULL
;
398 DestroyRingBuffer(data
->ring
);
404 static void pulse_close(ALCdevice
*device
) //{{{
406 pulse_data
*data
= device
->ExtraData
;
408 ppa_threaded_mainloop_lock(data
->loop
);
410 ppa_stream_disconnect(data
->stream
);
411 ppa_stream_unref(data
->stream
);
413 ppa_context_disconnect(data
->context
);
414 ppa_context_unref(data
->context
);
416 ppa_threaded_mainloop_unlock(data
->loop
);
418 ppa_threaded_mainloop_stop(data
->loop
);
419 ppa_threaded_mainloop_free(data
->loop
);
421 device
->ExtraData
= NULL
;
422 device
->szDeviceName
= NULL
;
423 DestroyRingBuffer(data
->ring
);
430 static ALCboolean
pulse_open_playback(ALCdevice
*device
, const ALCchar
*device_name
) //{{{
434 if(strcmp(device_name
, pulse_device
) != 0)
438 return pulse_open(device
, pulse_device
, device
->Format
, 0, device
->Frequency
);
441 static void pulse_close_playback(ALCdevice
*device
) //{{{
446 static ALCboolean
pulse_open_capture(ALCdevice
*device
, const ALCchar
*device_name
, ALCuint frequency
, ALCenum format
, ALCsizei samples
) //{{{
450 if(strcmp(device_name
, pulse_capture_device
) != 0)
454 return pulse_open(device
, pulse_capture_device
, format
, samples
, frequency
);
457 static void pulse_close_capture(ALCdevice
*device
) //{{{
462 static void pulse_start_capture(ALCdevice
*device
) //{{{
464 pulse_data
*data
= device
->ExtraData
;
466 ppa_threaded_mainloop_lock(data
->loop
);
467 ppa_stream_set_read_callback(data
->stream
, stream_read_callback
, device
);
468 ppa_threaded_mainloop_unlock(data
->loop
);
471 static void pulse_stop_capture(ALCdevice
*device
) //{{{
473 pulse_data
*data
= device
->ExtraData
;
475 ppa_threaded_mainloop_lock(data
->loop
);
476 ppa_stream_set_read_callback(data
->stream
, NULL
, NULL
);
477 ppa_threaded_mainloop_unlock(data
->loop
);
480 static void pulse_capture_samples(ALCdevice
*device
, ALCvoid
*buffer
, ALCuint samples
) //{{{
482 pulse_data
*data
= device
->ExtraData
;
483 ALCuint available
= RingBufferSize(data
->ring
);
485 if(available
< samples
)
486 SetALCError(ALC_INVALID_VALUE
);
488 ReadRingBuffer(data
->ring
, buffer
, samples
);
491 static ALCuint
pulse_available_samples(ALCdevice
*device
) //{{{
493 pulse_data
*data
= device
->ExtraData
;
494 return RingBufferSize(data
->ring
);
497 BackendFuncs pulse_funcs
= { //{{{
499 pulse_close_playback
,
504 pulse_capture_samples
,
505 pulse_available_samples
508 void alc_pulse_init(BackendFuncs
*func_list
) //{{{
510 *func_list
= pulse_funcs
;
513 pa_handle
= LoadLibrary("libpulse-0.dll");
514 #define LOAD_FUNC(x) do { \
515 p##x = GetProcAddress(pa_handle, #x); \
517 FreeLibrary(pa_handle); \
523 #elif defined (HAVE_DLFCN_H)
525 #if defined(__APPLE__) && defined(__MACH__)
526 pa_handle
= dlopen("libpulse.0.dylib", RTLD_NOW
);
528 pa_handle
= dlopen("libpulse.so.0", RTLD_NOW
);
530 #define LOAD_FUNC(x) do { \
531 p##x = dlsym(pa_handle, #x); \
533 dlclose(pa_handle); \
541 #define LOAD_FUNC(x) p##x = (x)
545 LOAD_FUNC(pa_context_unref
);
546 LOAD_FUNC(pa_sample_spec_valid
);
547 LOAD_FUNC(pa_stream_drop
);
548 LOAD_FUNC(pa_strerror
);
549 LOAD_FUNC(pa_context_get_state
);
550 LOAD_FUNC(pa_stream_get_state
);
551 LOAD_FUNC(pa_threaded_mainloop_signal
);
552 LOAD_FUNC(pa_stream_peek
);
553 LOAD_FUNC(pa_threaded_mainloop_wait
);
554 LOAD_FUNC(pa_threaded_mainloop_unlock
);
555 LOAD_FUNC(pa_context_new
);
556 LOAD_FUNC(pa_threaded_mainloop_stop
);
557 LOAD_FUNC(pa_context_disconnect
);
558 LOAD_FUNC(pa_threaded_mainloop_start
);
559 LOAD_FUNC(pa_threaded_mainloop_get_api
);
560 LOAD_FUNC(pa_context_set_state_callback
);
561 LOAD_FUNC(pa_stream_write
);
563 LOAD_FUNC(pa_stream_connect_record
);
564 LOAD_FUNC(pa_stream_connect_playback
);
565 LOAD_FUNC(pa_path_get_filename
);
566 LOAD_FUNC(pa_get_binary_name
);
567 LOAD_FUNC(pa_threaded_mainloop_free
);
568 LOAD_FUNC(pa_context_errno
);
569 LOAD_FUNC(pa_xmalloc0
);
570 LOAD_FUNC(pa_stream_unref
);
571 LOAD_FUNC(pa_threaded_mainloop_accept
);
572 LOAD_FUNC(pa_stream_set_write_callback
);
573 LOAD_FUNC(pa_threaded_mainloop_new
);
574 LOAD_FUNC(pa_context_connect
);
575 LOAD_FUNC(pa_stream_set_read_callback
);
576 LOAD_FUNC(pa_stream_set_state_callback
);
577 LOAD_FUNC(pa_stream_new
);
578 LOAD_FUNC(pa_stream_disconnect
);
579 LOAD_FUNC(pa_threaded_mainloop_lock
);
583 pulse_device
= AppendDeviceList("PulseAudio Software");
584 AppendAllDeviceList(pulse_device
);
586 pulse_capture_device
= AppendCaptureDeviceList("PulseAudio Capture");