rdpsnd.c@ 54430

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RDP/client: fix OSE
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1	/* -- c-basic-offset: 8 --
2	rdesktop: A Remote Desktop Protocol client.
3	Sound Channel Process Functions
4	Copyright 2006-2010 Pierre Ossman <[email protected]> for Cendio AB
5	Copyright 2009-2011 Peter Astrand <[email protected]> for Cendio AB
6	Copyright (C) Matthew Chapman <matthewc.unsw.edu.au> 2003-2008
7	Copyright (C) GuoJunBo <[email protected]> 2003
8
9	This program is free software: you can redistribute it and/or modify
10	it under the terms of the GNU General Public License as published by
11	the Free Software Foundation, either version 3 of the License, or
12	(at your option) any later version.
13
14	This program is distributed in the hope that it will be useful,
15	but WITHOUT ANY WARRANTY; without even the implied warranty of
16	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17	GNU General Public License for more details.
18
19	You should have received a copy of the GNU General Public License
20	along with this program. If not, see <http://www.gnu.org/licenses/>.
21	*/
22
23	/*
24	* Oracle GPL Disclaimer: For the avoidance of doubt, except that if any license choice
25	* other than GPL or LGPL is available it will apply instead, Oracle elects to use only
26	* the General Public License version 2 (GPLv2) at this time for any software where
27	* a choice of GPL license versions is made available with the language indicating
28	* that GPLv2 or any later version may be used, or where a choice of which version
29	* of the GPL is applied is otherwise unspecified.
30	*/
31
32	#include <assert.h>
33
34	#include "rdesktop.h"
35	#include "rdpsnd.h"
36	#include "rdpsnd_dsp.h"
37
38	#define RDPSND_CLOSE 1
39	#define RDPSND_WRITE 2
40	#define RDPSND_SET_VOLUME 3
41	#define RDPSND_UNKNOWN4 4
42	#define RDPSND_COMPLETION 5
43	#define RDPSND_PING 6
44	#define RDPSND_NEGOTIATE 7
45
46	#define RDPSND_REC_NEGOTIATE 39
47	#define RDPSND_REC_START 40
48	#define RDPSND_REC_STOP 41
49	#define RDPSND_REC_DATA 42
50	#define RDPSND_REC_SET_VOLUME 43
51
52	#define RDPSND_FLAG_RECORD 0x00800000
53
54	#define MAX_FORMATS 10
55	#define MAX_QUEUE 50
56
57	static VCHANNEL *rdpsnd_channel;
58	static VCHANNEL *rdpsnddbg_channel;
59	static struct audio_driver *drivers = NULL;
60	struct audio_driver *current_driver = NULL;
61
62	static RD_BOOL rdpsnd_negotiated;
63	static RD_BOOL rdpsnd_rec_negotiated;
64
65	static RD_BOOL device_open;
66	static RD_BOOL rec_device_open;
67
68	static RD_WAVEFORMATEX formats[MAX_FORMATS];
69	static unsigned int format_count;
70	static unsigned int current_format;
71
72	static RD_WAVEFORMATEX rec_formats[MAX_FORMATS];
73	static unsigned int rec_format_count;
74	static unsigned int rec_current_format;
75
76	unsigned int queue_hi, queue_lo, queue_pending;
77	struct audio_packet packet_queue[MAX_QUEUE];
78
79	static char record_buffer[8192];
80	static uint32 record_buffer_size;
81
82	static uint8 packet_opcode;
83	static struct stream packet;
84
85	void (*wave_out_play) (void);
86
87	static void rdpsnd_queue_write(STREAM s, uint16 tick, uint8 index);
88	static void rdpsnd_queue_init(void);
89	static void rdpsnd_queue_clear(void);
90	static void rdpsnd_queue_complete_pending(void);
91	static long rdpsnd_queue_next_completion(void);
92
93	static STREAM
94	rdpsnd_init_packet(uint16 type, uint16 size)
95	{
96	STREAM s;
97
98	s = channel_init(rdpsnd_channel, size + 4);
99	out_uint16_le(s, type);
100	out_uint16_le(s, size);
101	return s;
102	}
103
104	static void
105	rdpsnd_send(STREAM s)
106	{
107	channel_send(s, rdpsnd_channel);
108	}
109
110	static void
111	rdpsnd_send_completion(uint16 tick, uint8 packet_index)
112	{
113	STREAM s;
114
115	s = rdpsnd_init_packet(RDPSND_COMPLETION, 4);
116	out_uint16_le(s, tick);
117	out_uint8(s, packet_index);
118	out_uint8(s, 0);
119	s_mark_end(s);
120	rdpsnd_send(s);
121
122	DEBUG_SOUND(("RDPSND: -> RDPSND_COMPLETION(tick: %u, index: %u)\n",
123	(unsigned) tick, (unsigned) packet_index));
124	}
125
126	static void
127	rdpsnd_flush_record(void)
128	{
129	STREAM s;
130	unsigned int chunk_size;
131	char *data;
132
133	if (record_buffer_size == 0)
134	return;
135
136	assert(record_buffer_size <= sizeof(record_buffer));
137
138	data = record_buffer;
139
140	/*
141	* Microsoft's RDP server keeps dropping chunks, so we need to
142	* transmit everything inside one channel fragment or we risk
143	* making the rdpsnd server go out of sync with the byte stream.
144	*/
145	while (record_buffer_size)
146	{
147	if (record_buffer_size < 1596)
148	chunk_size = record_buffer_size;
149	else
150	chunk_size = 1596;
151
152	s = rdpsnd_init_packet(RDPSND_REC_DATA, chunk_size);
153	out_uint8p(s, data, chunk_size);
154
155	s_mark_end(s);
156	rdpsnd_send(s);
157
158	data = data + chunk_size;
159	record_buffer_size -= chunk_size;
160
161	DEBUG_SOUND(("RDPSND: -> RDPSND_REC_DATA(length: %u)\n", (unsigned) chunk_size));
162	}
163
164	record_buffer_size = 0;
165	}
166
167	static void
168	rdpsnd_clear_record(void)
169	{
170	/*
171	* Silently drop everything we have in the record buffer as
172	* we've somehow gotten a reset in regard to the server.
173	*/
174	record_buffer_size = 0;
175	}
176
177	void
178	rdpsnd_record(const void *data, unsigned int size)
179	{
180	uint32 remain, chunk;
181
182	assert(rec_device_open);
183
184	while (size)
185	{
186	remain = sizeof(record_buffer) - record_buffer_size;
187
188	if (size >= remain)
189	chunk = remain;
190	else
191	chunk = size;
192
193	memcpy(record_buffer + record_buffer_size, data, chunk);
194
195	#ifdef B_ENDIAN
196	if (current_driver->need_byteswap_on_be)
197	rdpsnd_dsp_swapbytes(record_buffer + record_buffer_size,
198	chunk, &rec_formats[rec_current_format]);
199	#endif
200
201	record_buffer_size += chunk;
202
203	data = (const char *) data + chunk;
204	size -= chunk;
205
206	if (record_buffer_size == sizeof(record_buffer))
207	rdpsnd_flush_record();
208	}
209	}
210
211	static RD_BOOL
212	rdpsnd_auto_select(void)
213	{
214	static RD_BOOL failed = False;
215
216	if (!failed)
217	{
218	current_driver = drivers;
219	while (current_driver != NULL)
220	{
221	DEBUG(("trying %s...\n", current_driver->name));
222	if (current_driver->wave_out_open())
223	{
224	DEBUG(("selected %s\n", current_driver->name));
225	current_driver->wave_out_close();
226	return True;
227	}
228	current_driver = current_driver->next;
229	}
230
231	warning("no working audio-driver found\n");
232	failed = True;
233	current_driver = NULL;
234	}
235
236	return False;
237	}
238
239	static void
240	rdpsnd_process_negotiate(STREAM in)
241	{
242	uint16 in_format_count, i;
243	uint8 pad;
244	uint16 version;
245	RD_WAVEFORMATEX *format;
246	STREAM out;
247	RD_BOOL device_available = False;
248	int readcnt;
249	int discardcnt;
250
251	in_uint8s(in, 14); /* initial bytes not valid from server */
252	in_uint16_le(in, in_format_count);
253	in_uint8(in, pad);
254	in_uint16_le(in, version);
255	in_uint8s(in, 1); /* padding */
256
257	DEBUG_SOUND(("RDPSND: RDPSND_NEGOTIATE(formats: %d, pad: 0x%02x, version: %x)\n",
258	(int) in_format_count, (unsigned) pad, (unsigned) version));
259
260	if (rdpsnd_negotiated)
261	{
262	error("RDPSND: Extra RDPSND_NEGOTIATE in the middle of a session\n");
263	/* Do a complete reset of the sound state */
264	rdpsnd_reset_state();
265	}
266
267	if (!current_driver)
268	device_available = rdpsnd_auto_select();
269
270	if (current_driver && !device_available && current_driver->wave_out_open())
271	{
272	current_driver->wave_out_close();
273	device_available = True;
274	}
275
276	format_count = 0;
277	if (s_check_rem(in, 18 * in_format_count))
278	{
279	for (i = 0; i < in_format_count; i++)
280	{
281	format = &formats[format_count];
282	in_uint16_le(in, format->wFormatTag);
283	in_uint16_le(in, format->nChannels);
284	in_uint32_le(in, format->nSamplesPerSec);
285	in_uint32_le(in, format->nAvgBytesPerSec);
286	in_uint16_le(in, format->nBlockAlign);
287	in_uint16_le(in, format->wBitsPerSample);
288	in_uint16_le(in, format->cbSize);
289
290	/* read in the buffer of unknown use */
291	readcnt = format->cbSize;
292	discardcnt = 0;
293	if (format->cbSize > MAX_CBSIZE)
294	{
295	fprintf(stderr, "cbSize too large for buffer: %d\n",
296	format->cbSize);
297	readcnt = MAX_CBSIZE;
298	discardcnt = format->cbSize - MAX_CBSIZE;
299	}
300	in_uint8a(in, format->cb, readcnt);
301	in_uint8s(in, discardcnt);
302
303	if (current_driver && current_driver->wave_out_format_supported(format))
304	{
305	format_count++;
306	if (format_count == MAX_FORMATS)
307	break;
308	}
309	}
310	}
311
312	out = rdpsnd_init_packet(RDPSND_NEGOTIATE \| 0x200, 20 + 18 * format_count);
313	out_uint32_le(out, 0x00800003); /* flags */
314	out_uint32(out, 0xffffffff); /* volume */
315	out_uint32(out, 0); /* pitch */
316	out_uint16(out, 0); /* UDP port */
317
318	out_uint16_le(out, format_count);
319	out_uint8(out, 0); /* padding */
320	out_uint16_le(out, 2); /* version */
321	out_uint8(out, 0); /* padding */
322
323	for (i = 0; i < format_count; i++)
324	{
325	format = &formats[i];
326	out_uint16_le(out, format->wFormatTag);
327	out_uint16_le(out, format->nChannels);
328	out_uint32_le(out, format->nSamplesPerSec);
329	out_uint32_le(out, format->nAvgBytesPerSec);
330	out_uint16_le(out, format->nBlockAlign);
331	out_uint16_le(out, format->wBitsPerSample);
332	out_uint16(out, 0); /* cbSize */
333	}
334
335	s_mark_end(out);
336
337	DEBUG_SOUND(("RDPSND: -> RDPSND_NEGOTIATE(formats: %d)\n", (int) format_count));
338
339	rdpsnd_send(out);
340
341	rdpsnd_negotiated = True;
342	}
343
344	static void
345	rdpsnd_process_ping(STREAM in)
346	{
347	uint16 tick;
348	STREAM out;
349
350	in_uint16_le(in, tick);
351
352	DEBUG_SOUND(("RDPSND: RDPSND_PING(tick: 0x%04x)\n", (unsigned) tick));
353
354	out = rdpsnd_init_packet(RDPSND_PING \| 0x2300, 4);
355	out_uint16_le(out, tick);
356	out_uint16_le(out, 0);
357	s_mark_end(out);
358	rdpsnd_send(out);
359
360	DEBUG_SOUND(("RDPSND: -> (tick: 0x%04x)\n", (unsigned) tick));
361	}
362
363	static void
364	rdpsnd_process_rec_negotiate(STREAM in)
365	{
366	uint16 in_format_count, i;
367	uint16 version;
368	RD_WAVEFORMATEX *format;
369	STREAM out;
370	RD_BOOL device_available = False;
371	int readcnt;
372	int discardcnt;
373
374	in_uint8s(in, 8); /* initial bytes not valid from server */
375	in_uint16_le(in, in_format_count);
376	in_uint16_le(in, version);
377
378	DEBUG_SOUND(("RDPSND: RDPSND_REC_NEGOTIATE(formats: %d, version: %x)\n",
379	(int) in_format_count, (unsigned) version));
380
381	if (rdpsnd_rec_negotiated)
382	{
383	error("RDPSND: Extra RDPSND_REC_NEGOTIATE in the middle of a session\n");
384	/* Do a complete reset of the sound state */
385	rdpsnd_reset_state();
386	}
387
388	if (!current_driver)
389	device_available = rdpsnd_auto_select();
390
391	if (current_driver && !device_available && current_driver->wave_in_open
392	&& current_driver->wave_in_open())
393	{
394	current_driver->wave_in_close();
395	device_available = True;
396	}
397
398	rec_format_count = 0;
399	if (s_check_rem(in, 18 * in_format_count))
400	{
401	for (i = 0; i < in_format_count; i++)
402	{
403	format = &rec_formats[rec_format_count];
404	in_uint16_le(in, format->wFormatTag);
405	in_uint16_le(in, format->nChannels);
406	in_uint32_le(in, format->nSamplesPerSec);
407	in_uint32_le(in, format->nAvgBytesPerSec);
408	in_uint16_le(in, format->nBlockAlign);
409	in_uint16_le(in, format->wBitsPerSample);
410	in_uint16_le(in, format->cbSize);
411
412	/* read in the buffer of unknown use */
413	readcnt = format->cbSize;
414	discardcnt = 0;
415	if (format->cbSize > MAX_CBSIZE)
416	{
417	fprintf(stderr, "cbSize too large for buffer: %d\n",
418	format->cbSize);
419	readcnt = MAX_CBSIZE;
420	discardcnt = format->cbSize - MAX_CBSIZE;
421	}
422	in_uint8a(in, format->cb, readcnt);
423	in_uint8s(in, discardcnt);
424
425	if (current_driver && current_driver->wave_in_format_supported
426	&& current_driver->wave_in_format_supported(format))
427	{
428	rec_format_count++;
429	if (rec_format_count == MAX_FORMATS)
430	break;
431	}
432	}
433	}
434
435	out = rdpsnd_init_packet(RDPSND_REC_NEGOTIATE, 12 + 18 * rec_format_count);
436	out_uint32_le(out, 0x00000000); /* flags */
437	out_uint32_le(out, 0xffffffff); /* volume */
438	out_uint16_le(out, rec_format_count);
439	out_uint16_le(out, 1); /* version */
440
441	for (i = 0; i < rec_format_count; i++)
442	{
443	format = &rec_formats[i];
444	out_uint16_le(out, format->wFormatTag);
445	out_uint16_le(out, format->nChannels);
446	out_uint32_le(out, format->nSamplesPerSec);
447	out_uint32_le(out, format->nAvgBytesPerSec);
448	out_uint16_le(out, format->nBlockAlign);
449	out_uint16_le(out, format->wBitsPerSample);
450	out_uint16(out, 0); /* cbSize */
451	}
452
453	s_mark_end(out);
454
455	DEBUG_SOUND(("RDPSND: -> RDPSND_REC_NEGOTIATE(formats: %d)\n", (int) rec_format_count));
456
457	rdpsnd_send(out);
458
459	rdpsnd_rec_negotiated = True;
460	}
461
462	static void
463	rdpsnd_process_packet(uint8 opcode, STREAM s)
464	{
465	uint16 vol_left, vol_right;
466	static uint16 tick, format;
467	static uint8 packet_index;
468
469	switch (opcode)
470	{
471	case RDPSND_WRITE:
472	in_uint16_le(s, tick);
473	in_uint16_le(s, format);
474	in_uint8(s, packet_index);
475	in_uint8s(s, 3);
476	DEBUG_SOUND(("RDPSND: RDPSND_WRITE(tick: %u, format: %u, index: %u, data: %u bytes)\n", (unsigned) tick, (unsigned) format, (unsigned) packet_index, (unsigned) s->size - 8));
477
478	if (format >= MAX_FORMATS)
479	{
480	error("RDPSND: Invalid format index\n");
481	break;
482	}
483
484	if (!device_open \|\| (format != current_format))
485	{
486	/*
487	* If we haven't selected a device by now, then either
488	* we've failed to find a working device, or the server
489	* is sending bogus RDPSND_WRITE.
490	*/
491	if (!current_driver)
492	{
493	rdpsnd_send_completion(tick, packet_index);
494	break;
495	}
496	if (!device_open && !current_driver->wave_out_open())
497	{
498	rdpsnd_send_completion(tick, packet_index);
499	break;
500	}
501	if (!current_driver->wave_out_set_format(&formats[format]))
502	{
503	rdpsnd_send_completion(tick, packet_index);
504	current_driver->wave_out_close();
505	device_open = False;
506	break;
507	}
508	device_open = True;
509	current_format = format;
510	}
511
512	rdpsnd_queue_write(rdpsnd_dsp_process
513	(s->p, s->end - s->p, current_driver,
514	&formats[current_format]), tick, packet_index);
515	return;
516	break;
517	case RDPSND_CLOSE:
518	DEBUG_SOUND(("RDPSND: RDPSND_CLOSE()\n"));
519	if (device_open)
520	current_driver->wave_out_close();
521	device_open = False;
522	break;
523	case RDPSND_NEGOTIATE:
524	rdpsnd_process_negotiate(s);
525	break;
526	case RDPSND_PING:
527	rdpsnd_process_ping(s);
528	break;
529	case RDPSND_SET_VOLUME:
530	in_uint16_le(s, vol_left);
531	in_uint16_le(s, vol_right);
532	DEBUG_SOUND(("RDPSND: RDPSND_VOLUME(left: 0x%04x (%u %%), right: 0x%04x (%u %%))\n", (unsigned) vol_left, (unsigned) vol_left / 655, (unsigned) vol_right, (unsigned) vol_right / 655));
533	if (device_open)
534	current_driver->wave_out_volume(vol_left, vol_right);
535	break;
536	case RDPSND_REC_NEGOTIATE:
537	rdpsnd_process_rec_negotiate(s);
538	break;
539	case RDPSND_REC_START:
540	in_uint16_le(s, format);
541	DEBUG_SOUND(("RDPSND: RDPSND_REC_START(format: %u)\n", (unsigned) format));
542
543	if (format >= MAX_FORMATS)
544	{
545	error("RDPSND: Invalid format index\n");
546	break;
547	}
548
549	if (rec_device_open)
550	{
551	error("RDPSND: Multiple RDPSND_REC_START\n");
552	break;
553	}
554
555	if (!current_driver->wave_in_open())
556	break;
557
558	if (!current_driver->wave_in_set_format(&rec_formats[format]))
559	{
560	error("RDPSND: Device not accepting format\n");
561	current_driver->wave_in_close();
562	break;
563	}
564	rec_current_format = format;
565	rec_device_open = True;
566	break;
567	case RDPSND_REC_STOP:
568	DEBUG_SOUND(("RDPSND: RDPSND_REC_STOP()\n"));
569	rdpsnd_flush_record();
570	if (rec_device_open)
571	current_driver->wave_in_close();
572	rec_device_open = False;
573	break;
574	case RDPSND_REC_SET_VOLUME:
575	in_uint16_le(s, vol_left);
576	in_uint16_le(s, vol_right);
577	DEBUG_SOUND(("RDPSND: RDPSND_REC_VOLUME(left: 0x%04x (%u %%), right: 0x%04x (%u %%))\n", (unsigned) vol_left, (unsigned) vol_left / 655, (unsigned) vol_right, (unsigned) vol_right / 655));
578	if (rec_device_open)
579	current_driver->wave_in_volume(vol_left, vol_right);
580	break;
581	default:
582	unimpl("RDPSND packet type %x\n", opcode);
583	break;
584	}
585	}
586
587	static void
588	rdpsnd_process(STREAM s)
589	{
590	uint16 len;
591
592	while (!s_check_end(s))
593	{
594	/* New packet */
595	if (packet.size == 0)
596	{
597	if ((s->end - s->p) < 4)
598	{
599	error("RDPSND: Split at packet header. Things will go south from here...\n");
600	return;
601	}
602	in_uint8(s, packet_opcode);
603	in_uint8s(s, 1); /* Padding */
604	in_uint16_le(s, len);
605
606	DEBUG_SOUND(("RDPSND: == Opcode %x Length: %d ==\n",
607	(int) packet_opcode, (int) len));
608
609	packet.p = packet.data;
610	packet.end = packet.data + len;
611	packet.size = len;
612	}
613	else
614	{
615	len = MIN(s->end - s->p, packet.end - packet.p);
616
617	/* Microsoft's server is so broken it's not even funny... */
618	if (packet_opcode == RDPSND_WRITE)
619	{
620	if ((packet.p - packet.data) < 12)
621	len = MIN(len, 12 - (packet.p - packet.data));
622	else if ((packet.p - packet.data) == 12)
623	{
624	DEBUG_SOUND(("RDPSND: Eating 4 bytes of %d bytes...\n",
625	len));
626	in_uint8s(s, 4);
627	len -= 4;
628	}
629	}
630
631	in_uint8a(s, packet.p, len);
632	packet.p += len;
633	}
634
635	/* Packet fully assembled */
636	if (packet.p == packet.end)
637	{
638	packet.p = packet.data;
639	rdpsnd_process_packet(packet_opcode, &packet);
640	packet.size = 0;
641	}
642	}
643	}
644
645	static RD_BOOL
646	rdpsnddbg_line_handler(const char line, void data)
647	{
648	#ifdef WITH_DEBUG_SOUND
649	fprintf(stderr, "SNDDBG: %s\n", line);
650	#endif
651	return True;
652	}
653
654	static void
655	rdpsnddbg_process(STREAM s)
656	{
657	unsigned int pkglen;
658	static char *rest = NULL;
659	char *buf;
660
661	pkglen = s->end - s->p;
662	/* str_handle_lines requires null terminated strings */
663	buf = (char *) xmalloc(pkglen + 1);
664	STRNCPY(buf, (char *) s->p, pkglen + 1);
665
666	str_handle_lines(buf, &rest, rdpsnddbg_line_handler, NULL);
667
668	xfree(buf);
669	}
670
671	static void
672	rdpsnd_register_drivers(char *options)
673	{
674	struct audio_driver **reg;
675
676	/* The order of registrations define the probe-order
677	when opening the device for the first time */
678	reg = &drivers;
679	#if defined(RDPSND_ALSA)
680	*reg = alsa_register(options);
681	assert(*reg);
682	reg = &((*reg)->next);
683	#endif
684	#if defined(RDPSND_SUN)
685	*reg = sun_register(options);
686	assert(*reg);
687	reg = &((*reg)->next);
688	#endif
689	#if defined(RDPSND_OSS)
690	*reg = oss_register(options);
691	assert(*reg);
692	reg = &((*reg)->next);
693	#endif
694	#if defined(RDPSND_SGI)
695	*reg = sgi_register(options);
696	assert(*reg);
697	reg = &((*reg)->next);
698	#endif
699	#if defined(RDPSND_LIBAO)
700	*reg = libao_register(options);
701	assert(*reg);
702	reg = &((*reg)->next);
703	#endif
704	*reg = NULL;
705	}
706
707	RD_BOOL
708	rdpsnd_init(char *optarg)
709	{
710	struct audio_driver *pos;
711	char driver = NULL, options = NULL;
712
713	drivers = NULL;
714
715	packet.data = (uint8 *) xmalloc(65536);
716	packet.p = packet.end = packet.data;
717	packet.size = 0;
718
719	rdpsnd_channel =
720	channel_register("rdpsnd", CHANNEL_OPTION_INITIALIZED \| CHANNEL_OPTION_ENCRYPT_RDP,
721	rdpsnd_process);
722
723	rdpsnddbg_channel =
724	channel_register("snddbg", CHANNEL_OPTION_INITIALIZED \| CHANNEL_OPTION_ENCRYPT_RDP,
725	rdpsnddbg_process);
726
727	if ((rdpsnd_channel == NULL) \|\| (rdpsnddbg_channel == NULL))
728	{
729	error("channel_register\n");
730	return False;
731	}
732
733	rdpsnd_queue_init();
734
735	if (optarg != NULL && strlen(optarg) > 0)
736	{
737	driver = options = optarg;
738
739	while (options != '\0' && options != ':')
740	options++;
741
742	if (*options == ':')
743	{
744	*options = '\0';
745	options++;
746	}
747
748	if (*options == '\0')
749	options = NULL;
750	}
751
752	rdpsnd_register_drivers(options);
753
754	if (!driver)
755	return True;
756
757	pos = drivers;
758	while (pos != NULL)
759	{
760	if (!strcmp(pos->name, driver))
761	{
762	DEBUG(("selected %s\n", pos->name));
763	current_driver = pos;
764	return True;
765	}
766	pos = pos->next;
767	}
768	return False;
769	}
770
771	void
772	rdpsnd_reset_state(void)
773	{
774	if (device_open)
775	current_driver->wave_out_close();
776	device_open = False;
777	rdpsnd_queue_clear();
778	rdpsnd_negotiated = False;
779
780	if (rec_device_open)
781	current_driver->wave_in_close();
782	rec_device_open = False;
783	rdpsnd_clear_record();
784	rdpsnd_rec_negotiated = False;
785	}
786
787
788	void
789	rdpsnd_show_help(void)
790	{
791	struct audio_driver *pos;
792
793	rdpsnd_register_drivers(NULL);
794
795	pos = drivers;
796	while (pos != NULL)
797	{
798	fprintf(stderr, " %s:\t%s\n", pos->name, pos->description);
799	pos = pos->next;
800	}
801	}
802
803	void
804	rdpsnd_add_fds(int n, fd_set rfds, fd_set * wfds, struct timeval *tv)
805	{
806	long next_pending;
807
808	if (device_open \|\| rec_device_open)
809	current_driver->add_fds(n, rfds, wfds, tv);
810
811	next_pending = rdpsnd_queue_next_completion();
812	if (next_pending >= 0)
813	{
814	long cur_timeout;
815
816	cur_timeout = tv->tv_sec * 1000000 + tv->tv_usec;
817	if (cur_timeout > next_pending)
818	{
819	tv->tv_sec = next_pending / 1000000;
820	tv->tv_usec = next_pending % 1000000;
821	}
822	}
823	}
824
825	void
826	rdpsnd_check_fds(fd_set * rfds, fd_set * wfds)
827	{
828	rdpsnd_queue_complete_pending();
829
830	if (device_open \|\| rec_device_open)
831	current_driver->check_fds(rfds, wfds);
832	}
833
834	static void
835	rdpsnd_queue_write(STREAM s, uint16 tick, uint8 index)
836	{
837	struct audio_packet *packet = &packet_queue[queue_hi];
838	unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE;
839
840	if (next_hi == queue_pending)
841	{
842	error("No space to queue audio packet\n");
843	return;
844	}
845
846	queue_hi = next_hi;
847
848	packet->s = *s;
849	packet->tick = tick;
850	packet->index = index;
851
852	gettimeofday(&packet->arrive_tv, NULL);
853	}
854
855	struct audio_packet *
856	rdpsnd_queue_current_packet(void)
857	{
858	return &packet_queue[queue_lo];
859	}
860
861	RD_BOOL
862	rdpsnd_queue_empty(void)
863	{
864	return (queue_lo == queue_hi);
865	}
866
867	static void
868	rdpsnd_queue_init(void)
869	{
870	queue_pending = queue_lo = queue_hi = 0;
871	}
872
873	static void
874	rdpsnd_queue_clear(void)
875	{
876	struct audio_packet *packet;
877
878	/* Go through everything, not just the pending packets */
879	while (queue_pending != queue_hi)
880	{
881	packet = &packet_queue[queue_pending];
882	xfree(packet->s.data);
883	queue_pending = (queue_pending + 1) % MAX_QUEUE;
884	}
885
886	/* Reset everything back to the initial state */
887	queue_pending = queue_lo = queue_hi = 0;
888	}
889
890	void
891	rdpsnd_queue_next(unsigned long completed_in_us)
892	{
893	struct audio_packet *packet;
894
895	assert(!rdpsnd_queue_empty());
896
897	packet = &packet_queue[queue_lo];
898
899	gettimeofday(&packet->completion_tv, NULL);
900
901	packet->completion_tv.tv_usec += completed_in_us;
902	packet->completion_tv.tv_sec += packet->completion_tv.tv_usec / 1000000;
903	packet->completion_tv.tv_usec %= 1000000;
904
905	queue_lo = (queue_lo + 1) % MAX_QUEUE;
906
907	rdpsnd_queue_complete_pending();
908	}
909
910	int
911	rdpsnd_queue_next_tick(void)
912	{
913	if (((queue_lo + 1) % MAX_QUEUE) != queue_hi)
914	{
915	return packet_queue[(queue_lo + 1) % MAX_QUEUE].tick;
916	}
917	else
918	{
919	return (packet_queue[queue_lo].tick + 65535) % 65536;
920	}
921	}
922
923	static void
924	rdpsnd_queue_complete_pending(void)
925	{
926	struct timeval now;
927	long elapsed;
928	struct audio_packet *packet;
929
930	gettimeofday(&now, NULL);
931
932	while (queue_pending != queue_lo)
933	{
934	packet = &packet_queue[queue_pending];
935
936	if (now.tv_sec < packet->completion_tv.tv_sec)
937	break;
938
939	if ((now.tv_sec == packet->completion_tv.tv_sec) &&
940	(now.tv_usec < packet->completion_tv.tv_usec))
941	break;
942
943	elapsed = (packet->completion_tv.tv_sec - packet->arrive_tv.tv_sec) * 1000000 +
944	(packet->completion_tv.tv_usec - packet->arrive_tv.tv_usec);
945	elapsed /= 1000;
946
947	xfree(packet->s.data);
948	rdpsnd_send_completion((packet->tick + elapsed) % 65536, packet->index);
949	queue_pending = (queue_pending + 1) % MAX_QUEUE;
950	}
951	}
952
953	static long
954	rdpsnd_queue_next_completion(void)
955	{
956	struct audio_packet *packet;
957	long remaining;
958	struct timeval now;
959
960	if (queue_pending == queue_lo)
961	return -1;
962
963	gettimeofday(&now, NULL);
964
965	packet = &packet_queue[queue_pending];
966
967	remaining = (packet->completion_tv.tv_sec - now.tv_sec) * 1000000 +
968	(packet->completion_tv.tv_usec - now.tv_usec);
969
970	if (remaining < 0)
971	return 0;
972
973	return remaining;
974	}

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source: vbox/trunk/src/VBox/RDP/client/rdpsnd.c@ 54430

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