pulseaudio.c@ 54988

Last change on this file since 54988 was 51637, checked in by vboxsync, 10 years ago
Pulseaudio: Bitten by duplicate files...
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1	/** @file
2	*
3	* VBox PulseAudio backend
4	*/
5
6	/*
7	* Copyright (C) 2006-2010 Oracle Corporation
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
18
19	/*******************************************************************************
20	* Header Files *
21	*******************************************************************************/
22	#define LOG_GROUP LOG_GROUP_DEV_AUDIO
23	#include <VBox/log.h>
24	#include <iprt/mem.h>
25
26	#include "pulse_mangling.h"
27	#include "pulse_stubs.h"
28	#include <pulse/pulseaudio.h>
29
30	#include "vl_vbox.h"
31	#include "audio.h"
32	#define AUDIO_CAP "pulse"
33	#include "audio_int.h"
34	#include <stdio.h>
35
36	#define MAX_LOG_REL_ERRORS 32
37
38	/*
39	* We use a g_pMainLoop in a separate thread g_pContext. We have to call functions for
40	* manipulating objects either from callback functions or we have to protect
41	* these functions by pa_threaded_mainloop_lock() / pa_threaded_mainloop_unlock().
42	*/
43	static struct pa_threaded_mainloop *g_pMainLoop;
44	static struct pa_context *g_pContext;
45
46	typedef struct PulseVoice
47	{
48	/** not accessed from within this context */
49	union
50	{
51	HWVoiceOut In;
52	HWVoiceIn Out;
53	} hw;
54	/** DAC buffer */
55	void *pPCMBuf;
56	/** Pulse stream */
57	pa_stream *pStream;
58	/** Pulse sample format and attribute specification */
59	pa_sample_spec SampleSpec;
60	/** Pulse playback and buffer metrics */
61	pa_buffer_attr BufAttr;
62	int fOpSuccess;
63	/** number of logged errors */
64	unsigned cErrors;
65	/** Pulse record peek buffer */
66	const uint8_t *pu8PeekBuf;
67	size_t cbPeekBuf;
68	size_t offPeekBuf;
69	pa_operation *pDrainOp;
70	} PulseVoice;
71
72	/* The desired buffer length in milliseconds. Will be the target total stream
73	* latency on newer version of pulse. Apparent latency can be less (or more.)
74	*/
75	static struct
76	{
77	int buffer_msecs_out;
78	int buffer_msecs_in;
79	} conf
80	=
81	{
82	INIT_FIELD (.buffer_msecs_out = ) 100,
83	INIT_FIELD (.buffer_msecs_in = ) 100,
84	};
85
86	static pa_sample_format_t aud_to_pulsefmt (audfmt_e fmt)
87	{
88	switch (fmt)
89	{
90	case AUD_FMT_U8:
91	return PA_SAMPLE_U8;
92
93	case AUD_FMT_S16:
94	return PA_SAMPLE_S16LE;
95
96	#ifdef PA_SAMPLE_S32LE
97	case AUD_FMT_S32:
98	return PA_SAMPLE_S32LE;
99	#endif
100
101	default:
102	dolog ("Bad audio format %d\n", fmt);
103	return PA_SAMPLE_U8;
104	}
105	}
106
107
108	static int pulse_to_audfmt (pa_sample_format_t pulsefmt, audfmt_e fmt, int endianess)
109	{
110	switch (pulsefmt)
111	{
112	case PA_SAMPLE_U8:
113	*endianess = 0;
114	*fmt = AUD_FMT_U8;
115	break;
116
117	case PA_SAMPLE_S16LE:
118	*fmt = AUD_FMT_S16;
119	*endianess = 0;
120	break;
121
122	case PA_SAMPLE_S16BE:
123	*fmt = AUD_FMT_S16;
124	*endianess = 1;
125	break;
126
127	#ifdef PA_SAMPLE_S32LE
128	case PA_SAMPLE_S32LE:
129	*fmt = AUD_FMT_S32;
130	*endianess = 0;
131	break;
132	#endif
133
134	#ifdef PA_SAMPLE_S32BE
135	case PA_SAMPLE_S32BE:
136	*fmt = AUD_FMT_S32;
137	*endianess = 1;
138	break;
139	#endif
140
141	default:
142	return -1;
143	}
144	return 0;
145	}
146
147	static void stream_success_callback(pa_stream pStream, int fSuccess, void userdata)
148	{
149	PulseVoice pPulse = (PulseVoice )userdata;
150	pPulse->fOpSuccess = fSuccess;
151	if (!fSuccess)
152	{
153	if (pPulse->cErrors < MAX_LOG_REL_ERRORS)
154	{
155	int rc = pa_context_errno(g_pContext);
156	pPulse->cErrors++;
157	LogRel(("Pulse: Failed stream operation: %s\n", pa_strerror(rc)));
158	}
159	}
160	pa_threaded_mainloop_signal(g_pMainLoop, 0);
161	}
162
163	/**
164	* Synchronously wait until an operation completed.
165	*/
166	static int pulse_wait_for_operation (pa_operation *op)
167	{
168	if (op)
169	{
170	while (pa_operation_get_state(op) == PA_OPERATION_RUNNING)
171	pa_threaded_mainloop_wait(g_pMainLoop);
172	pa_operation_unref(op);
173	}
174
175	return 1;
176	}
177
178	/**
179	* Context status changed.
180	*/
181	static void context_state_callback(pa_context pContext, void userdata)
182	{
183	PulseVoice pPulse = (PulseVoice )userdata;
184	switch (pa_context_get_state(pContext))
185	{
186	case PA_CONTEXT_READY:
187	case PA_CONTEXT_TERMINATED:
188	pa_threaded_mainloop_signal(g_pMainLoop, 0);
189	break;
190
191	case PA_CONTEXT_FAILED:
192	LogRel(("Pulse: Audio input/output stopped!\n"));
193	if (pPulse)
194	pPulse->cErrors = MAX_LOG_REL_ERRORS;
195	pa_threaded_mainloop_signal(g_pMainLoop, 0);
196	break;
197
198	default:
199	break;
200	}
201	}
202
203	/**
204	* Stream status changed.
205	*/
206	static void stream_state_callback(pa_stream pStream, void userdata)
207	{
208	switch (pa_stream_get_state(pStream))
209	{
210	case PA_STREAM_READY:
211	case PA_STREAM_FAILED:
212	case PA_STREAM_TERMINATED:
213	pa_threaded_mainloop_signal(g_pMainLoop, 0);
214	break;
215
216	default:
217	break;
218	}
219	}
220
221	/**
222	* Callback called when our pa_stream_drain operation was completed.
223	*/
224	static void stream_drain_callback(pa_stream pStream, int fSuccess, void userdata)
225	{
226	PulseVoice pPulse = (PulseVoice )userdata;
227	pPulse->fOpSuccess = fSuccess;
228	if (!fSuccess)
229	{
230	if (pPulse->cErrors < MAX_LOG_REL_ERRORS)
231	{
232	int rc = pa_context_errno(g_pContext);
233	pPulse->cErrors++;
234	LogRel(("Pulse: Failed stream operation: %s\n", pa_strerror(rc)));
235	}
236	}
237	else
238	pa_operation_unref(pa_stream_cork(pStream, 1, stream_success_callback, userdata));
239
240	pa_operation_unref(pPulse->pDrainOp);
241	pPulse->pDrainOp = NULL;
242	}
243
244	static int pulse_open (int fIn, pa_stream *ppStream, pa_sample_spec pSampleSpec,
245	pa_buffer_attr *pBufAttr)
246	{
247	const pa_buffer_attr *pBufAttrObtained;
248	pa_stream *pStream = NULL;
249	char achPCMName[64];
250	pa_stream_flags_t flags = 0;
251	const char *stream_name = audio_get_stream_name();
252
253	RTStrPrintf(achPCMName, sizeof(achPCMName), "%.32s%s%s%s",
254	stream_name ? stream_name : "",
255	stream_name ? " (" : "",
256	fIn ? "pcm_in" : "pcm_out",
257	stream_name ? ")" : "");
258
259	LogRel(("Pulse: Open %s rate=%dHz channels=%d format=%s\n",
260	fIn ? "PCM_IN" : "PCM_OUT", pSampleSpec->rate, pSampleSpec->channels,
261	pa_sample_format_to_string(pSampleSpec->format)));
262
263	if (!pa_sample_spec_valid(pSampleSpec))
264	{
265	LogRel(("Pulse: Unsupported sample specification\n"));
266	goto fail;
267	}
268
269	pa_threaded_mainloop_lock(g_pMainLoop);
270
271	if (!(pStream = pa_stream_new(g_pContext, achPCMName, pSampleSpec, /channel_map=/NULL)))
272	{
273	LogRel(("Pulse: Cannot create stream %s\n", achPCMName));
274	goto unlock_and_fail;
275	}
276
277	pa_stream_set_state_callback(pStream, stream_state_callback, NULL);
278
279	#if PA_API_VERSION >= 12
280	/* XXX */
281	flags \|= PA_STREAM_ADJUST_LATENCY;
282	#endif
283
284	#if 0
285	/* not applicable as we don't use pa_stream_get_latency() and pa_stream_get_time() */
286	flags \|= PA_STREAM_INTERPOLATE_TIMING \| PA_STREAM_AUTO_TIMING_UPDATE;
287	#endif
288
289	/* no input/output right away after the stream was started */
290	flags \|= PA_STREAM_START_CORKED;
291
292	if (fIn)
293	{
294	LogRel(("Pulse: Requested record buffer attributes: maxlength=%d fragsize=%d\n",
295	pBufAttr->maxlength, pBufAttr->fragsize));
296
297	if (pa_stream_connect_record(pStream, /dev=/NULL, pBufAttr, flags) < 0)
298	{
299	LogRel(("Pulse: Cannot connect record stream: %s\n",
300	pa_strerror(pa_context_errno(g_pContext))));
301	goto disconnect_unlock_and_fail;
302	}
303	}
304	else
305	{
306	LogRel(("Pulse: Requested playback buffer attributes: maxlength=%d tlength=%d prebuf=%d minreq=%d\n",
307	pBufAttr->maxlength, pBufAttr->tlength, pBufAttr->prebuf, pBufAttr->minreq));
308
309	if (pa_stream_connect_playback(pStream, /dev=/NULL, pBufAttr, flags,
310	/cvolume=/NULL, /sync_stream=/NULL) < 0)
311	{
312	LogRel(("Pulse: Cannot connect playback stream: %s\n",
313	pa_strerror(pa_context_errno(g_pContext))));
314	goto disconnect_unlock_and_fail;
315	}
316	}
317
318	/* Wait until the stream is ready */
319	for (;;)
320	{
321	pa_stream_state_t sstate;
322	pa_threaded_mainloop_wait(g_pMainLoop);
323
324	sstate = pa_stream_get_state(pStream);
325	if (sstate == PA_STREAM_READY)
326	break;
327	else if (sstate == PA_STREAM_FAILED \|\| sstate == PA_STREAM_TERMINATED)
328	{
329	LogRel(("Pulse: Failed to initialize stream (state %d)\n", sstate));
330	goto disconnect_unlock_and_fail;
331	}
332	}
333
334	pBufAttrObtained = pa_stream_get_buffer_attr(pStream);
335	memcpy(pBufAttr, pBufAttrObtained, sizeof(pa_buffer_attr));
336
337	if (fIn)
338	{
339	LogRel(("Pulse: Obtained record buffer attributes: maxlength=%d fragsize=%d\n",
340	pBufAttr->maxlength, pBufAttr->fragsize));
341	}
342	else
343	{
344	LogRel(("Pulse: Obtained playback buffer attributes: maxlength=%d tlength=%d prebuf=%d minreq=%d\n",
345	pBufAttr->maxlength, pBufAttr->tlength, pBufAttr->prebuf, pBufAttr->minreq));
346	}
347
348	pa_threaded_mainloop_unlock(g_pMainLoop);
349	*ppStream = pStream;
350	return 0;
351
352	disconnect_unlock_and_fail:
353	pa_stream_disconnect(pStream);
354
355	unlock_and_fail:
356	pa_threaded_mainloop_unlock(g_pMainLoop);
357
358	fail:
359	if (pStream)
360	pa_stream_unref(pStream);
361
362	*ppStream = NULL;
363	return -1;
364	}
365
366	static int pulse_init_out (HWVoiceOut hw, audsettings_t as)
367	{
368	PulseVoice pPulse = (PulseVoice ) hw;
369	audsettings_t obt_as;
370	int cbBuf;
371
372	pPulse->pDrainOp = NULL;
373
374	pPulse->SampleSpec.format = aud_to_pulsefmt (as->fmt);
375	pPulse->SampleSpec.rate = as->freq;
376	pPulse->SampleSpec.channels = as->nchannels;
377
378	/* Note that setting maxlength to -1 does not work on PulseAudio servers
379	* older than 0.9.10. So use the suggested value of 3/2 of tlength */
380	pPulse->BufAttr.tlength = (pa_bytes_per_second(&pPulse->SampleSpec)
381	* conf.buffer_msecs_out) / 1000;
382	pPulse->BufAttr.maxlength = (pPulse->BufAttr.tlength * 3) / 2;
383	pPulse->BufAttr.prebuf = -1; /* Same as tlength */
384	pPulse->BufAttr.minreq = -1; /* Pulse should set something sensible for minreq on it's own */
385
386	/* Notice that the struct BufAttr is updated to the obtained values after this call */
387	if (pulse_open (0, &pPulse->pStream, &pPulse->SampleSpec, &pPulse->BufAttr))
388	return -1;
389
390	if (pulse_to_audfmt (pPulse->SampleSpec.format, &obt_as.fmt, &obt_as.endianness))
391	{
392	LogRel(("Pulse: Cannot find audio format %d\n", pPulse->SampleSpec.format));
393	return -1;
394	}
395
396	obt_as.freq = pPulse->SampleSpec.rate;
397	obt_as.nchannels = pPulse->SampleSpec.channels;
398
399	audio_pcm_init_info (&hw->info, &obt_as);
400	cbBuf = audio_MIN(pPulse->BufAttr.tlength * 2, pPulse->BufAttr.maxlength);
401
402	pPulse->pPCMBuf = RTMemAllocZ(cbBuf);
403	if (!pPulse->pPCMBuf)
404	{
405	LogRel(("Pulse: Could not allocate DAC buffer of %d bytes\n", cbBuf));
406	return -1;
407	}
408
409	/* Convert from bytes to frames (aka samples) */
410	hw->samples = cbBuf >> hw->info.shift;
411
412	return 0;
413	}
414
415	static void pulse_fini_out (HWVoiceOut *hw)
416	{
417	PulseVoice pPulse = (PulseVoice )hw;
418
419	if (pPulse->pStream)
420	{
421	pa_threaded_mainloop_lock(g_pMainLoop);
422	pa_stream_disconnect(pPulse->pStream);
423	pa_stream_unref(pPulse->pStream);
424	pa_threaded_mainloop_unlock(g_pMainLoop);
425	pPulse->pStream = NULL;
426	}
427
428	if (pPulse->pPCMBuf)
429	{
430	RTMemFree (pPulse->pPCMBuf);
431	pPulse->pPCMBuf = NULL;
432	}
433	}
434
435	static int pulse_run_out (HWVoiceOut *hw)
436	{
437	PulseVoice pPulse = (PulseVoice ) hw;
438	int cFramesLive;
439	int cFramesWritten = 0;
440	int csSamples;
441	int cFramesToWrite;
442	int cFramesAvail;
443	size_t cbAvail;
444	size_t cbToWrite;
445	uint8_t *pu8Dst;
446	st_sample_t *psSrc;
447
448	cFramesLive = audio_pcm_hw_get_live_out (hw);
449	if (!cFramesLive)
450	return 0;
451
452	pa_threaded_mainloop_lock(g_pMainLoop);
453
454	cbAvail = pa_stream_writable_size (pPulse->pStream);
455	if (cbAvail == (size_t)-1)
456	{
457	if (pPulse->cErrors < MAX_LOG_REL_ERRORS)
458	{
459	int rc = pa_context_errno(g_pContext);
460	pPulse->cErrors++;
461	LogRel(("Pulse: Failed to determine the writable size: %s\n",
462	pa_strerror(rc)));
463	}
464	goto unlock_and_exit;
465	}
466
467	cFramesAvail = cbAvail >> hw->info.shift; /* bytes => samples */
468	cFramesWritten = audio_MIN (cFramesLive, cFramesAvail);
469	csSamples = cFramesWritten;
470
471	while (csSamples)
472	{
473	/* split request at the end of our samples buffer */
474	cFramesToWrite = audio_MIN (csSamples, hw->samples - hw->rpos);
475	cbToWrite = cFramesToWrite << hw->info.shift;
476	psSrc = hw->mix_buf + hw->rpos;
477	pu8Dst = advance (pPulse->pPCMBuf, hw->rpos << hw->info.shift);
478
479	hw->clip (pu8Dst, psSrc, cFramesToWrite);
480
481	if (pa_stream_write (pPulse->pStream, pu8Dst, cbToWrite,
482	/cleanup_callback=/NULL, 0, PA_SEEK_RELATIVE) < 0)
483	{
484	LogRel(("Pulse: Failed to write %d samples: %s\n",
485	cFramesToWrite, pa_strerror(pa_context_errno(g_pContext))));
486	break;
487	}
488	hw->rpos = (hw->rpos + cFramesToWrite) % hw->samples;
489	csSamples -= cFramesToWrite;
490	}
491
492	unlock_and_exit:
493	pa_threaded_mainloop_unlock(g_pMainLoop);
494
495	return cFramesWritten;
496	}
497
498	static int pulse_write (SWVoiceOut sw, void buf, int len)
499	{
500	return audio_pcm_sw_write (sw, buf, len);
501	}
502
503	static int pulse_ctl_out (HWVoiceOut *hw, int cmd, ...)
504	{
505	PulseVoice pPulse = (PulseVoice ) hw;
506
507	switch (cmd)
508	{
509	case VOICE_ENABLE:
510	/* Start audio output. */
511	pa_threaded_mainloop_lock(g_pMainLoop);
512	if ( pPulse->pDrainOp
513	&& pa_operation_get_state(pPulse->pDrainOp) != PA_OPERATION_DONE)
514	{
515	pa_operation_cancel(pPulse->pDrainOp);
516	pa_operation_unref(pPulse->pDrainOp);
517	pPulse->pDrainOp = NULL;
518	}
519	else
520	{
521	/* should return immediately */
522	pulse_wait_for_operation(pa_stream_cork(pPulse->pStream, 0,
523	stream_success_callback, pPulse));
524	}
525	pa_threaded_mainloop_unlock(g_pMainLoop);
526	break;
527
528	case VOICE_DISABLE:
529	/* Pause audio output (the Pause bit of the AC97 x_CR register is set).
530	* Note that we must return immediately from here! */
531	pa_threaded_mainloop_lock(g_pMainLoop);
532	if (!pPulse->pDrainOp)
533	{
534	/* should return immediately */
535	pulse_wait_for_operation(pa_stream_trigger(pPulse->pStream,
536	stream_success_callback, pPulse));
537	pPulse->pDrainOp = pa_stream_drain(pPulse->pStream,
538	stream_drain_callback, pPulse);
539	}
540	pa_threaded_mainloop_unlock(g_pMainLoop);
541	break;
542
543	default:
544	return -1;
545	}
546	return 0;
547	}
548
549	static int pulse_init_in (HWVoiceIn hw, audsettings_t as)
550	{
551	PulseVoice pPulse = (PulseVoice ) hw;
552	audsettings_t obt_as;
553
554	pPulse->SampleSpec.format = aud_to_pulsefmt (as->fmt);
555	pPulse->SampleSpec.rate = as->freq;
556	pPulse->SampleSpec.channels = as->nchannels;
557
558	/* XXX check these values */
559	pPulse->BufAttr.fragsize = (pa_bytes_per_second(&pPulse->SampleSpec)
560	* conf.buffer_msecs_in) / 1000;
561	pPulse->BufAttr.maxlength = (pPulse->BufAttr.fragsize * 3) / 2;
562	/* Other members of pa_buffer_attr are ignored for record streams */
563
564	if (pulse_open (1, &pPulse->pStream, &pPulse->SampleSpec, &pPulse->BufAttr))
565	return -1;
566
567	if (pulse_to_audfmt (pPulse->SampleSpec.format, &obt_as.fmt, &obt_as.endianness))
568	{
569	LogRel(("Pulse: Cannot find audio format %d\n", pPulse->SampleSpec.format));
570	return -1;
571	}
572
573	obt_as.freq = pPulse->SampleSpec.rate;
574	obt_as.nchannels = pPulse->SampleSpec.channels;
575	audio_pcm_init_info (&hw->info, &obt_as);
576	hw->samples = audio_MIN(pPulse->BufAttr.fragsize * 10, pPulse->BufAttr.maxlength)
577	>> hw->info.shift;
578	pPulse->pu8PeekBuf = NULL;
579
580	return 0;
581	}
582
583	static void pulse_fini_in (HWVoiceIn *hw)
584	{
585	PulseVoice pPulse = (PulseVoice )hw;
586
587	if (pPulse->pStream)
588	{
589	pa_threaded_mainloop_lock(g_pMainLoop);
590	pa_stream_disconnect(pPulse->pStream);
591	pa_stream_unref(pPulse->pStream);
592	pa_threaded_mainloop_unlock(g_pMainLoop);
593	pPulse->pStream = NULL;
594	}
595	}
596
597	static int pulse_run_in (HWVoiceIn *hw)
598	{
599	PulseVoice pPulse = (PulseVoice ) hw;
600	const int hwshift = hw->info.shift;
601	int cFramesRead = 0; /* total frames which have been read this call */
602	int cFramesAvail; /* total frames available from pulse at start of call */
603	int cFramesToRead; /* the largest amount we want/can get this call */
604	int cFramesToPeek; /* the largest amount we want/can get this peek */
605
606	/* We should only call pa_stream_readable_size() once and trust the first value */
607	pa_threaded_mainloop_lock(g_pMainLoop);
608	cFramesAvail = pa_stream_readable_size(pPulse->pStream) >> hwshift;
609	pa_threaded_mainloop_unlock(g_pMainLoop);
610
611	if (cFramesAvail == -1)
612	{
613	if (pPulse->cErrors < MAX_LOG_REL_ERRORS)
614	{
615	int rc = pa_context_errno(g_pContext);
616	pPulse->cErrors++;
617	LogRel(("Pulse: Failed to determine the readable size: %s\n",
618	pa_strerror(rc)));
619	}
620	return 0;
621	}
622
623	/* If the buffer was not dropped last call, add what remains */
624	if (pPulse->pu8PeekBuf)
625	cFramesAvail += (pPulse->cbPeekBuf - pPulse->offPeekBuf) >> hwshift;
626
627	cFramesToRead = audio_MIN(cFramesAvail, hw->samples - audio_pcm_hw_get_live_in(hw));
628	for (; cFramesToRead; cFramesToRead -= cFramesToPeek)
629	{
630	/* If there is no data, do another peek */
631	if (!pPulse->pu8PeekBuf)
632	{
633	pa_threaded_mainloop_lock(g_pMainLoop);
634	pa_stream_peek(pPulse->pStream, (const void**)&pPulse->pu8PeekBuf, &pPulse->cbPeekBuf);
635	pa_threaded_mainloop_unlock(g_pMainLoop);
636	pPulse->offPeekBuf = 0;
637	if ( !pPulse->pu8PeekBuf
638	\|\| !pPulse->cbPeekBuf)
639	break;
640	}
641
642	cFramesToPeek = audio_MIN((signed)( pPulse->cbPeekBuf
643	- pPulse->offPeekBuf) >> hwshift,
644	cFramesToRead);
645
646	/* Check for wrapping around the buffer end */
647	if (hw->wpos + cFramesToPeek > hw->samples)
648	{
649	int cFramesDelta = hw->samples - hw->wpos;
650
651	hw->conv(hw->conv_buf + hw->wpos,
652	pPulse->pu8PeekBuf + pPulse->offPeekBuf,
653	cFramesDelta,
654	&nominal_volume);
655
656	hw->conv(hw->conv_buf,
657	pPulse->pu8PeekBuf + pPulse->offPeekBuf + (cFramesDelta << hwshift),
658	cFramesToPeek - cFramesDelta,
659	&nominal_volume);
660	}
661	else
662	{
663	hw->conv(hw->conv_buf + hw->wpos,
664	pPulse->pu8PeekBuf + pPulse->offPeekBuf,
665	cFramesToPeek,
666	&nominal_volume);
667	}
668
669	cFramesRead += cFramesToPeek;
670	hw->wpos = (hw->wpos + cFramesToPeek) % hw->samples;
671	pPulse->offPeekBuf += cFramesToPeek << hwshift;
672
673	/* If the buffer is done, drop it */
674	if (pPulse->offPeekBuf == pPulse->cbPeekBuf)
675	{
676	pa_threaded_mainloop_lock(g_pMainLoop);
677	pa_stream_drop(pPulse->pStream);
678	pa_threaded_mainloop_unlock(g_pMainLoop);
679	pPulse->pu8PeekBuf = NULL;
680	}
681	}
682
683	return cFramesRead;
684	}
685
686	static int pulse_read (SWVoiceIn sw, void buf, int size)
687	{
688	return audio_pcm_sw_read (sw, buf, size);
689	}
690
691	static int pulse_ctl_in (HWVoiceIn *hw, int cmd, ...)
692	{
693	PulseVoice pPulse = (PulseVoice )hw;
694
695	switch (cmd)
696	{
697	case VOICE_ENABLE:
698	pa_threaded_mainloop_lock(g_pMainLoop);
699	/* should return immediately */
700	pulse_wait_for_operation(pa_stream_cork(pPulse->pStream, 0,
701	stream_success_callback, pPulse));
702	pa_threaded_mainloop_unlock(g_pMainLoop);
703	break;
704
705	case VOICE_DISABLE:
706	pa_threaded_mainloop_lock(g_pMainLoop);
707	if (pPulse->pu8PeekBuf)
708	{
709	pa_stream_drop(pPulse->pStream);
710	pPulse->pu8PeekBuf = NULL;
711	}
712	/* should return immediately */
713	pulse_wait_for_operation(pa_stream_cork(pPulse->pStream, 1,
714	stream_success_callback, pPulse));
715	pa_threaded_mainloop_unlock(g_pMainLoop);
716	break;
717
718	default:
719	return -1;
720	}
721	return 0;
722	}
723
724	static void *pulse_audio_init (void)
725	{
726	int rc;
727
728	rc = audioLoadPulseLib();
729	if (RT_FAILURE(rc))
730	{
731	LogRel(("Pulse: Failed to load the PulseAudio shared library! Error %Rrc\n", rc));
732	return NULL;
733	}
734
735	if (!(g_pMainLoop = pa_threaded_mainloop_new()))
736	{
737	LogRel(("Pulse: Failed to allocate main loop: %s\n",
738	pa_strerror(pa_context_errno(g_pContext))));
739	goto fail;
740	}
741
742	if (!(g_pContext = pa_context_new(pa_threaded_mainloop_get_api(g_pMainLoop), "VBox")))
743	{
744	LogRel(("Pulse: Failed to allocate context: %s\n",
745	pa_strerror(pa_context_errno(g_pContext))));
746	goto fail;
747	}
748
749	if (pa_threaded_mainloop_start(g_pMainLoop) < 0)
750	{
751	LogRel(("Pulse: Failed to start threaded mainloop: %s\n",
752	pa_strerror(pa_context_errno(g_pContext))));
753	goto fail;
754	}
755
756	pa_context_set_state_callback(g_pContext, context_state_callback, NULL);
757	pa_threaded_mainloop_lock(g_pMainLoop);
758
759	if (pa_context_connect(g_pContext, /server=/NULL, 0, NULL) < 0)
760	{
761	LogRel(("Pulse: Failed to connect to server: %s\n",
762	pa_strerror(pa_context_errno(g_pContext))));
763	goto unlock_and_fail;
764	}
765
766	/* Wait until the g_pContext is ready */
767	for (;;)
768	{
769	pa_context_state_t cstate;
770	pa_threaded_mainloop_wait(g_pMainLoop);
771	cstate = pa_context_get_state(g_pContext);
772	if (cstate == PA_CONTEXT_READY)
773	break;
774	else if (cstate == PA_CONTEXT_TERMINATED \|\| cstate == PA_CONTEXT_FAILED)
775	{
776	LogRel(("Pulse: Failed to initialize context (state %d)\n", cstate));
777	goto unlock_and_fail;
778	}
779	}
780	pa_threaded_mainloop_unlock(g_pMainLoop);
781
782	return &conf;
783
784	unlock_and_fail:
785	if (g_pMainLoop)
786	pa_threaded_mainloop_unlock(g_pMainLoop);
787
788	fail:
789	if (g_pMainLoop)
790	pa_threaded_mainloop_stop(g_pMainLoop);
791
792	if (g_pContext)
793	{
794	pa_context_disconnect(g_pContext);
795	pa_context_unref(g_pContext);
796	g_pContext = NULL;
797	}
798
799	if (g_pMainLoop)
800	{
801	pa_threaded_mainloop_free(g_pMainLoop);
802	g_pMainLoop = NULL;
803	}
804
805	return NULL;
806	}
807
808	static void pulse_audio_fini (void *opaque)
809	{
810	if (g_pMainLoop)
811	pa_threaded_mainloop_stop(g_pMainLoop);
812
813	if (g_pContext)
814	{
815	pa_context_disconnect(g_pContext);
816	pa_context_unref(g_pContext);
817	g_pContext = NULL;
818	}
819
820	if (g_pMainLoop)
821	{
822	pa_threaded_mainloop_free(g_pMainLoop);
823	g_pMainLoop = NULL;
824	}
825
826	(void) opaque;
827	}
828
829	static struct audio_option pulse_options[] =
830	{
831	{"DAC_MS", AUD_OPT_INT, &conf.buffer_msecs_out,
832	"DAC period size in milliseconds", NULL, 0},
833	{"ADC_MS", AUD_OPT_INT, &conf.buffer_msecs_in,
834	"ADC period size in milliseconds", NULL, 0},
835	{NULL, 0, NULL, NULL, NULL, 0}
836	};
837
838	static struct audio_pcm_ops pulse_pcm_ops =
839	{
840	pulse_init_out,
841	pulse_fini_out,
842	pulse_run_out,
843	pulse_write,
844	pulse_ctl_out,
845
846	pulse_init_in,
847	pulse_fini_in,
848	pulse_run_in,
849	pulse_read,
850	pulse_ctl_in
851	};
852
853	struct audio_driver pulse_audio_driver =
854	{
855	INIT_FIELD (name = ) "pulse",
856	INIT_FIELD (descr = ) "PulseAudio http://www.pulseaudio.org",
857	INIT_FIELD (options = ) pulse_options,
858	INIT_FIELD (init = ) pulse_audio_init,
859	INIT_FIELD (fini = ) pulse_audio_fini,
860	INIT_FIELD (pcm_ops = ) &pulse_pcm_ops,
861	INIT_FIELD (can_be_default = ) 1,
862	INIT_FIELD (max_voices_out = ) INT_MAX,
863	INIT_FIELD (max_voices_in = ) INT_MAX,
864	INIT_FIELD (voice_size_out = ) sizeof (PulseVoice),
865	INIT_FIELD (voice_size_in = ) sizeof (PulseVoice)
866	};

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source: vbox/trunk/src/VBox/Devices/Audio/pulseaudio.c@ 54988

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