VirtualBox

source: vbox/trunk/src/VBox/Devices/Audio/pulseaudio.c@ 14683

Last change on this file since 14683 was 12910, checked in by vboxsync, 16 years ago

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1/** @file
2 *
3 * VBox PulseAudio backend
4 */
5
6/*
7 * Copyright (C) 2006-2007 Sun Microsystems, Inc.
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 *
17 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18 * Clara, CA 95054 USA or visit http://www.sun.com if you need
19 * additional information or have any questions.
20 */
21
22
23/*******************************************************************************
24* Header Files *
25*******************************************************************************/
26#define LOG_GROUP LOG_GROUP_DEV_AUDIO
27#include <VBox/log.h>
28#include <iprt/mem.h>
29
30#include <pulse/pulseaudio.h>
31#include "pulse_stubs.h"
32
33#include "../../vl_vbox.h"
34#include "audio.h"
35#define AUDIO_CAP "pulse"
36#include "audio_int.h"
37#include <stdio.h>
38
39/*
40 * We use a g_pMainLoop in a separate thread g_pContext. We have to call functions for
41 * manipulating objects either from callback functions or we have to protect
42 * these functions by pa_threaded_mainloop_lock() / pa_threaded_mainloop_unlock().
43 */
44static struct pa_threaded_mainloop *g_pMainLoop;
45static struct pa_context *g_pContext;
46
47static void pulse_audio_fini (void *);
48
49typedef struct PulseVoice
50{
51 HWVoiceOut hw;
52 void *pPCMBuf;
53 pa_stream *pStream;
54 int fOpSuccess;
55} PulseVoice;
56
57static struct
58{
59 int buffer_msecs_out;
60 int buffer_msecs_in;
61} conf
62=
63{
64 INIT_FIELD (.buffer_msecs_out = ) 100,
65 INIT_FIELD (.buffer_msecs_in = ) 100,
66};
67
68struct pulse_params_req
69{
70 int freq;
71 pa_sample_format_t pa_format;
72 int nchannels;
73};
74
75struct pulse_params_obt
76{
77 int freq;
78 pa_sample_format_t pa_format;
79 int nchannels;
80 unsigned long buffer_size;
81};
82
83static pa_sample_format_t aud_to_pulsefmt (audfmt_e fmt)
84{
85 switch (fmt)
86 {
87 case AUD_FMT_U8:
88 return PA_SAMPLE_U8;
89
90 case AUD_FMT_S16:
91 return PA_SAMPLE_S16LE;
92
93#ifdef PA_SAMPLE_S32LE
94 case AUD_FMT_S32:
95 return PA_SAMPLE_S32LE;
96#endif
97
98 default:
99 dolog ("Bad audio format %d\n", fmt);
100 return PA_SAMPLE_U8;
101 }
102}
103
104
105static int pulse_to_audfmt (pa_sample_format_t pulsefmt, audfmt_e *fmt, int *endianess)
106{
107 switch (pulsefmt)
108 {
109 case PA_SAMPLE_U8:
110 *endianess = 0;
111 *fmt = AUD_FMT_U8;
112 break;
113
114 case PA_SAMPLE_S16LE:
115 *fmt = AUD_FMT_S16;
116 *endianess = 0;
117 break;
118
119 case PA_SAMPLE_S16BE:
120 *fmt = AUD_FMT_S16;
121 *endianess = 1;
122 break;
123
124#ifdef PA_SAMPLE_S32LE
125 case PA_SAMPLE_S32LE:
126 *fmt = AUD_FMT_S32;
127 *endianess = 0;
128 break;
129#endif
130
131#ifdef PA_SAMPLE_S32BE
132 case PA_SAMPLE_S32BE:
133 *fmt = AUD_FMT_S32;
134 *endianess = 1;
135 break;
136#endif
137
138 default:
139 return -1;
140 }
141 return 0;
142}
143
144static void context_state_callback(pa_context *c, void *userdata)
145{
146 switch (pa_context_get_state(c))
147 {
148 case PA_CONTEXT_READY:
149 case PA_CONTEXT_TERMINATED:
150 case PA_CONTEXT_FAILED:
151 pa_threaded_mainloop_signal(g_pMainLoop, 0);
152 break;
153 default:
154 break;
155 }
156}
157
158static void stream_state_callback(pa_stream *s, void *userdata)
159{
160 switch (pa_stream_get_state(s))
161 {
162 case PA_STREAM_READY:
163 case PA_STREAM_FAILED:
164 case PA_STREAM_TERMINATED:
165 pa_threaded_mainloop_signal(g_pMainLoop, 0);
166 break;
167 default:
168 break;
169 }
170}
171
172static void stream_latency_update_callback(pa_stream *s, void *userdata)
173{
174 pa_threaded_mainloop_signal(g_pMainLoop, 0);
175}
176
177static int pulse_open (int fIn, struct pulse_params_req *req,
178 struct pulse_params_obt *obt, pa_stream **ppStream)
179{
180 pa_sample_spec sspec;
181 pa_channel_map cmap;
182 pa_stream *pStream = NULL;
183 pa_buffer_attr bufAttr;
184 const pa_buffer_attr *pBufAttr;
185 const pa_sample_spec *pSampSpec;
186 char achPCMName[64];
187 pa_stream_flags_t flags;
188 int ms = fIn ? conf.buffer_msecs_in : conf.buffer_msecs_out;
189 const char *stream_name = audio_get_stream_name();
190
191 RTStrPrintf(achPCMName, sizeof(achPCMName), "%.32s%s%s%s",
192 stream_name ? stream_name : "",
193 stream_name ? " (" : "",
194 fIn ? "pcm_in" : "pcm_out",
195 stream_name ? ")" : "");
196 sspec.rate = req->freq;
197 sspec.channels = req->nchannels;
198 sspec.format = req->pa_format;
199
200 LogRel(("Pulse: open %s rate=%dHz channels=%d format=%s\n",
201 fIn ? "PCM_IN" : "PCM_OUT", req->freq, req->nchannels,
202 pa_sample_format_to_string(req->pa_format)));
203
204 if (!pa_sample_spec_valid(&sspec))
205 {
206 LogRel(("Pulse: Unsupported sample specification\n"));
207 goto fail;
208 }
209
210 pa_channel_map_init_auto(&cmap, sspec.channels, PA_CHANNEL_MAP_ALSA);
211
212#if 0
213 pa_cvolume_reset(&volume, sspec.channels);
214#endif
215
216 pa_threaded_mainloop_lock(g_pMainLoop);
217
218 if (!(pStream = pa_stream_new(g_pContext, achPCMName, &sspec, &cmap)))
219 {
220 LogRel(("Pulse: Cannot create stream %s\n", achPCMName));
221 goto unlock_and_fail;
222 }
223
224 pSampSpec = pa_stream_get_sample_spec(pStream);
225 obt->pa_format = pSampSpec->format;
226 obt->nchannels = pSampSpec->channels;
227 obt->freq = pSampSpec->rate;
228
229 pa_stream_set_state_callback(pStream, stream_state_callback, NULL);
230 pa_stream_set_latency_update_callback(pStream, stream_latency_update_callback, NULL);
231
232 memset(&bufAttr, 0, sizeof(bufAttr));
233 bufAttr.tlength = (pa_bytes_per_second(pSampSpec) * ms) / 1000;
234 bufAttr.maxlength = (bufAttr.tlength*3) / 2;
235 bufAttr.minreq = pa_bytes_per_second(pSampSpec) / 100; /* 10ms */
236 bufAttr.prebuf = bufAttr.tlength - bufAttr.minreq;
237 bufAttr.fragsize = pa_bytes_per_second(pSampSpec) / 100; /* 10ms */
238
239 flags = PA_STREAM_INTERPOLATE_TIMING | PA_STREAM_AUTO_TIMING_UPDATE;
240 if (fIn)
241 {
242 if (pa_stream_connect_record(pStream, /*dev=*/NULL, &bufAttr, flags) < 0)
243 {
244 LogRel(("Pulse: Cannot connect record stream : %s\n",
245 pa_strerror(pa_context_errno(g_pContext))));
246 goto disconnect_unlock_and_fail;
247 }
248 }
249 else
250 {
251 if (pa_stream_connect_playback(pStream, /*dev=*/NULL, &bufAttr, flags,
252 NULL, NULL) < 0)
253 {
254 LogRel(("Pulse: Cannot connect playback stream: %s\n",
255 pa_strerror(pa_context_errno(g_pContext))));
256 goto disconnect_unlock_and_fail;
257 }
258 }
259
260 /* Wait until the stream is ready */
261 for (;;)
262 {
263 pa_stream_state_t sstate;
264 pa_threaded_mainloop_wait(g_pMainLoop);
265 sstate = pa_stream_get_state(pStream);
266 if (sstate == PA_STREAM_READY)
267 break;
268 else if (sstate == PA_STREAM_FAILED || sstate == PA_STREAM_TERMINATED)
269 {
270 LogRel(("Pulse: Failed to initialize stream (state %d)\n", sstate));
271 goto disconnect_unlock_and_fail;
272 }
273 }
274
275 pBufAttr = pa_stream_get_buffer_attr(pStream);
276 obt->buffer_size = pBufAttr->maxlength;
277
278 pa_threaded_mainloop_unlock(g_pMainLoop);
279
280 LogRel(("Pulse: buffer settings: max=%d tlength=%d prebuf=%d minreq=%d\n",
281 pBufAttr->maxlength, pBufAttr->tlength, pBufAttr->prebuf, pBufAttr->minreq));
282
283 *ppStream = pStream;
284 return 0;
285
286disconnect_unlock_and_fail:
287 pa_stream_disconnect(pStream);
288
289unlock_and_fail:
290 pa_threaded_mainloop_unlock(g_pMainLoop);
291
292fail:
293 if (pStream)
294 pa_stream_unref(pStream);
295
296 *ppStream = NULL;
297 return -1;
298}
299
300static int pulse_init_out (HWVoiceOut *hw, audsettings_t *as)
301{
302 PulseVoice *pulse = (PulseVoice *) hw;
303 struct pulse_params_req req;
304 struct pulse_params_obt obt;
305 audfmt_e effective_fmt;
306 int endianness;
307 audsettings_t obt_as;
308
309 req.pa_format = aud_to_pulsefmt (as->fmt);
310 req.freq = as->freq;
311 req.nchannels = as->nchannels;
312
313 if (pulse_open (/*fIn=*/0, &req, &obt, &pulse->pStream))
314 return -1;
315
316 if (pulse_to_audfmt (obt.pa_format, &effective_fmt, &endianness))
317 {
318 LogRel(("Pulse: Cannot find audio format %d\n", obt.pa_format));
319 return -1;
320 }
321
322 obt_as.freq = obt.freq;
323 obt_as.nchannels = obt.nchannels;
324 obt_as.fmt = effective_fmt;
325 obt_as.endianness = endianness;
326
327 audio_pcm_init_info (&hw->info, &obt_as);
328 hw->samples = obt.buffer_size >> hw->info.shift;
329
330 pulse->pPCMBuf = RTMemAllocZ(obt.buffer_size);
331 if (!pulse->pPCMBuf)
332 {
333 LogRel(("Pulse: Could not allocate DAC buffer of %d bytes\n", obt.buffer_size));
334 return -1;
335 }
336
337 return 0;
338}
339
340static void pulse_fini_out (HWVoiceOut *hw)
341{
342 PulseVoice *pulse = (PulseVoice *)hw;
343 if (pulse->pStream)
344 {
345 pa_stream_disconnect(pulse->pStream);
346 pa_stream_unref(pulse->pStream);
347 pulse->pStream = NULL;
348 }
349 if (pulse->pPCMBuf)
350 {
351 RTMemFree (pulse->pPCMBuf);
352 pulse->pPCMBuf = NULL;
353 }
354}
355
356static int pulse_run_out (HWVoiceOut *hw)
357{
358 PulseVoice *pulse = (PulseVoice *) hw;
359 int csLive, csDecr, csSamples, csToWrite, csAvail;
360 size_t cbAvail, cbToWrite;
361 uint8_t *pu8Dst;
362 st_sample_t *psSrc;
363
364 csLive = audio_pcm_hw_get_live_out (hw);
365 if (!csLive)
366 return 0;
367
368 pa_threaded_mainloop_lock(g_pMainLoop);
369
370 cbAvail = pa_stream_writable_size (pulse->pStream);
371 if (cbAvail == (size_t)-1)
372 {
373 LogRel(("Pulse: Failed to determine the writable size: %s\n",
374 pa_strerror(pa_context_errno(g_pContext))));
375 return 0;
376 }
377
378 csAvail = cbAvail >> hw->info.shift; /* bytes => samples */
379 csDecr = audio_MIN (csLive, csAvail);
380 csSamples = csDecr;
381
382 while (csSamples)
383 {
384 /* split request at the end of our samples buffer */
385 csToWrite = audio_MIN (csSamples, hw->samples - hw->rpos);
386 cbToWrite = csToWrite << hw->info.shift;
387 psSrc = hw->mix_buf + hw->rpos;
388 pu8Dst = advance (pulse->pPCMBuf, hw->rpos << hw->info.shift);
389
390 hw->clip (pu8Dst, psSrc, csToWrite);
391
392 if (pa_stream_write (pulse->pStream, pu8Dst, cbToWrite,
393 /*cleanup_callback=*/NULL, 0, PA_SEEK_RELATIVE) < 0)
394 {
395 LogRel(("Pulse: Failed to write %d samples: %s\n",
396 csToWrite, pa_strerror(pa_context_errno(g_pContext))));
397 break;
398 }
399 hw->rpos = (hw->rpos + csToWrite) % hw->samples;
400 csSamples -= csToWrite;
401 }
402
403 pa_threaded_mainloop_unlock(g_pMainLoop);
404
405 return csDecr;
406}
407
408static int pulse_write (SWVoiceOut *sw, void *buf, int len)
409{
410 return audio_pcm_sw_write (sw, buf, len);
411}
412
413static void stream_success_callback(pa_stream *pStream, int success, void *userdata)
414{
415 PulseVoice *pulse = (PulseVoice *) userdata;
416 pulse->fOpSuccess = success;
417 pa_threaded_mainloop_signal(g_pMainLoop, 0);
418}
419
420typedef enum
421{
422 Unpause = 0,
423 Pause = 1,
424 Flush = 2,
425 Trigger = 3
426} pulse_cmd_t;
427
428static int pulse_ctrl (HWVoiceOut *hw, pulse_cmd_t cmd)
429{
430 PulseVoice *pulse = (PulseVoice *) hw;
431 pa_operation *op = NULL;
432
433 if (!pulse->pStream)
434 return 0;
435
436 pa_threaded_mainloop_lock(g_pMainLoop);
437 switch (cmd)
438 {
439 case Pause:
440 op = pa_stream_cork(pulse->pStream, 1, stream_success_callback, pulse);
441 break;
442 case Unpause:
443 op = pa_stream_cork(pulse->pStream, 0, stream_success_callback, pulse);
444 break;
445 case Flush:
446 op = pa_stream_flush(pulse->pStream, stream_success_callback, pulse);
447 break;
448 case Trigger:
449 op = pa_stream_trigger(pulse->pStream, stream_success_callback, pulse);
450 break;
451 default:
452 goto fail;
453 }
454 if (!op)
455 LogRel(("Pulse: Failed ctrl cmd=%d to stream: %s\n",
456 cmd, pa_strerror(pa_context_errno(g_pContext))));
457 else
458 pa_operation_unref(op);
459
460fail:
461 pa_threaded_mainloop_unlock(g_pMainLoop);
462 return 0;
463}
464
465static int pulse_ctl_out (HWVoiceOut *hw, int cmd, ...)
466{
467 switch (cmd)
468 {
469 case VOICE_ENABLE:
470 pulse_ctrl(hw, Unpause);
471 pulse_ctrl(hw, Trigger);
472 break;
473 case VOICE_DISABLE:
474 pulse_ctrl(hw, Flush);
475 break;
476 default:
477 return -1;
478 }
479 return 0;
480}
481
482static int pulse_init_in (HWVoiceIn *hw, audsettings_t *as)
483{
484 PulseVoice *pulse = (PulseVoice *) hw;
485 struct pulse_params_req req;
486 struct pulse_params_obt obt;
487 audfmt_e effective_fmt;
488 int endianness;
489 audsettings_t obt_as;
490
491 req.pa_format = aud_to_pulsefmt (as->fmt);
492 req.freq = as->freq;
493 req.nchannels = as->nchannels;
494
495 if (pulse_open (/*fIn=*/1, &req, &obt, &pulse->pStream))
496 return -1;
497
498 if (pulse_to_audfmt (obt.pa_format, &effective_fmt, &endianness))
499 {
500 LogRel(("Pulse: Cannot find audio format %d\n", obt.pa_format));
501 return -1;
502 }
503
504 obt_as.freq = obt.freq;
505 obt_as.nchannels = obt.nchannels;
506 obt_as.fmt = effective_fmt;
507 obt_as.endianness = endianness;
508
509 audio_pcm_init_info (&hw->info, &obt_as);
510
511 /* pcm_in: reserve twice as the maximum buffer length because of peek()/drop(). */
512 hw->samples = 2 * (obt.buffer_size >> hw->info.shift);
513
514 /* no buffer for input */
515 pulse->pPCMBuf = NULL;
516
517 return 0;
518}
519
520static void pulse_fini_in (HWVoiceIn *hw)
521{
522 PulseVoice *pulse = (PulseVoice *)hw;
523 if (pulse->pStream)
524 {
525 pa_stream_disconnect(pulse->pStream);
526 pa_stream_unref(pulse->pStream);
527 pulse->pStream = NULL;
528 }
529 if (pulse->pPCMBuf)
530 {
531 RTMemFree (pulse->pPCMBuf);
532 pulse->pPCMBuf = NULL;
533 }
534}
535
536static int pulse_run_in (HWVoiceIn *hw)
537{
538 PulseVoice *pulse = (PulseVoice *) hw;
539 int csDead, csDecr = 0, csSamples, csRead, csAvail;
540 size_t cbAvail;
541 const void *pu8Src;
542 st_sample_t *psDst;
543
544 csDead = hw->samples - audio_pcm_hw_get_live_in (hw);
545
546 if (!csDead)
547 return 0; /* no buffer available */
548
549 pa_threaded_mainloop_lock(g_pMainLoop);
550
551 if (pa_stream_peek(pulse->pStream, &pu8Src, &cbAvail) < 0)
552 {
553 LogRel(("Pulse: Peek failed: %s\n",
554 pa_strerror(pa_context_errno(g_pContext))));
555 goto exit;
556 }
557 if (!pu8Src)
558 goto exit;
559
560 csAvail = cbAvail >> hw->info.shift;
561 csDecr = audio_MIN (csDead, csAvail);
562
563 csSamples = csDecr;
564
565 while (csSamples)
566 {
567 /* split request at the end of our samples buffer */
568 psDst = hw->conv_buf + hw->wpos;
569 csRead = audio_MIN (csSamples, hw->samples - hw->wpos);
570 hw->conv (psDst, pu8Src, csRead, &nominal_volume);
571 hw->wpos = (hw->wpos + csRead) % hw->samples;
572 csSamples -= csRead;
573 pu8Src = (const void*)((uint8_t*)pu8Src + (csRead << hw->info.shift));
574 }
575
576 pa_stream_drop(pulse->pStream);
577
578exit:
579 pa_threaded_mainloop_unlock(g_pMainLoop);
580
581 return csDecr;
582}
583
584static int pulse_read (SWVoiceIn *sw, void *buf, int size)
585{
586 return audio_pcm_sw_read (sw, buf, size);
587}
588
589static int pulse_ctl_in (HWVoiceIn *hw, int cmd, ...)
590{
591 return 0;
592}
593
594static void *pulse_audio_init (void)
595{
596 int rc;
597
598 rc = audioLoadPulseLib();
599 if (RT_FAILURE(rc))
600 {
601 LogRel(("Pulse: Failed to load the PulseAudio shared library! Error %Rrc\n", rc));
602 return NULL;
603 }
604 if (!(g_pMainLoop = pa_threaded_mainloop_new()))
605 {
606 LogRel(("Pulse: Failed to allocate main loop: %s\n",
607 pa_strerror(pa_context_errno(g_pContext))));
608 goto fail;
609 }
610 if (!(g_pContext = pa_context_new(pa_threaded_mainloop_get_api(g_pMainLoop), "VBox")))
611 {
612 LogRel(("Pulse: Failed to allocate context: %s\n",
613 pa_strerror(pa_context_errno(g_pContext))));
614 goto fail;
615 }
616 if (pa_threaded_mainloop_start(g_pMainLoop) < 0)
617 {
618 LogRel(("Pulse: Failed to start threaded mainloop: %s\n",
619 pa_strerror(pa_context_errno(g_pContext))));
620 goto fail;
621 }
622
623 pa_context_set_state_callback(g_pContext, context_state_callback, NULL);
624 pa_threaded_mainloop_lock(g_pMainLoop);
625
626 if (pa_context_connect(g_pContext, /*server=*/NULL, 0, NULL) < 0)
627 {
628 LogRel(("Pulse: Failed to connect to server: %s\n",
629 pa_strerror(pa_context_errno(g_pContext))));
630 goto unlock_and_fail;
631 }
632
633 /* Wait until the g_pContext is ready */
634 for (;;)
635 {
636 pa_context_state_t cstate;
637 pa_threaded_mainloop_wait(g_pMainLoop);
638 cstate = pa_context_get_state(g_pContext);
639 if (cstate == PA_CONTEXT_READY)
640 break;
641 else if (cstate == PA_CONTEXT_TERMINATED || cstate == PA_CONTEXT_FAILED)
642 {
643 LogRel(("Pulse: Failed to initialize context (state %d)\n", cstate));
644 goto unlock_and_fail;
645 }
646 }
647 pa_threaded_mainloop_unlock(g_pMainLoop);
648
649 return &conf;
650
651unlock_and_fail:
652 if (g_pMainLoop)
653 pa_threaded_mainloop_unlock(g_pMainLoop);
654
655fail:
656 if (g_pMainLoop)
657 pa_threaded_mainloop_stop(g_pMainLoop);
658
659 if (g_pContext)
660 {
661 pa_context_disconnect(g_pContext);
662 pa_context_unref(g_pContext);
663 g_pContext = NULL;
664 }
665 if (g_pMainLoop)
666 {
667 pa_threaded_mainloop_free(g_pMainLoop);
668 g_pMainLoop = NULL;
669 }
670 return NULL;
671}
672
673static void pulse_audio_fini (void *opaque)
674{
675 if (g_pMainLoop)
676 pa_threaded_mainloop_stop(g_pMainLoop);
677 if (g_pContext)
678 {
679 pa_context_disconnect(g_pContext);
680 pa_context_unref(g_pContext);
681 g_pContext = NULL;
682 }
683 if (g_pMainLoop)
684 {
685 pa_threaded_mainloop_free(g_pMainLoop);
686 g_pMainLoop = NULL;
687 }
688 (void) opaque;
689}
690
691static struct audio_option pulse_options[] =
692{
693 {"DAC_MS", AUD_OPT_INT, &conf.buffer_msecs_out,
694 "DAC period size in milliseconds", NULL, 0},
695 {"ADC_MS", AUD_OPT_INT, &conf.buffer_msecs_in,
696 "ADC period size in milliseconds", NULL, 0},
697 {NULL, 0, NULL, NULL, NULL, 0}
698};
699
700static struct audio_pcm_ops pulse_pcm_ops =
701{
702 pulse_init_out,
703 pulse_fini_out,
704 pulse_run_out,
705 pulse_write,
706 pulse_ctl_out,
707
708 pulse_init_in,
709 pulse_fini_in,
710 pulse_run_in,
711 pulse_read,
712 pulse_ctl_in
713};
714
715struct audio_driver pulse_audio_driver =
716{
717 INIT_FIELD (name = ) "pulse",
718 INIT_FIELD (descr = ) "PulseAudio http://www.pulseaudio.org",
719 INIT_FIELD (options = ) pulse_options,
720 INIT_FIELD (init = ) pulse_audio_init,
721 INIT_FIELD (fini = ) pulse_audio_fini,
722 INIT_FIELD (pcm_ops = ) &pulse_pcm_ops,
723 INIT_FIELD (can_be_default = ) 1,
724 INIT_FIELD (max_voices_out = ) INT_MAX,
725 INIT_FIELD (max_voices_in = ) INT_MAX,
726 INIT_FIELD (voice_size_out = ) sizeof (PulseVoice),
727 INIT_FIELD (voice_size_in = ) sizeof (PulseVoice)
728};
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