1 |
/* -*- c-basic-offset: 8 -*- |
2 |
rdesktop: A Remote Desktop Protocol client. |
3 |
Sound Channel Process Functions |
4 |
Copyright (C) Matthew Chapman 2003 |
5 |
Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003 |
6 |
|
7 |
This program is free software; you can redistribute it and/or modify |
8 |
it under the terms of the GNU General Public License as published by |
9 |
the Free Software Foundation; either version 2 of the License, or |
10 |
(at your option) any later version. |
11 |
|
12 |
This program is distributed in the hope that it will be useful, |
13 |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 |
GNU General Public License for more details. |
16 |
|
17 |
You should have received a copy of the GNU General Public License |
18 |
along with this program; if not, write to the Free Software |
19 |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
20 |
*/ |
21 |
|
22 |
#include <assert.h> |
23 |
|
24 |
#include "rdesktop.h" |
25 |
#include "rdpsnd.h" |
26 |
#include "rdpsnd_dsp.h" |
27 |
|
28 |
#define RDPSND_CLOSE 1 |
29 |
#define RDPSND_WRITE 2 |
30 |
#define RDPSND_SET_VOLUME 3 |
31 |
#define RDPSND_UNKNOWN4 4 |
32 |
#define RDPSND_COMPLETION 5 |
33 |
#define RDPSND_SERVERTICK 6 |
34 |
#define RDPSND_NEGOTIATE 7 |
35 |
|
36 |
#define MAX_FORMATS 10 |
37 |
#define MAX_QUEUE 10 |
38 |
|
39 |
BOOL g_dsp_busy = False; |
40 |
int g_dsp_fd; |
41 |
|
42 |
static VCHANNEL *rdpsnd_channel; |
43 |
static struct audio_driver *drivers = NULL; |
44 |
struct audio_driver *current_driver = NULL; |
45 |
|
46 |
static BOOL device_open; |
47 |
static WAVEFORMATEX formats[MAX_FORMATS]; |
48 |
static unsigned int format_count; |
49 |
static unsigned int current_format; |
50 |
unsigned int queue_hi, queue_lo; |
51 |
struct audio_packet packet_queue[MAX_QUEUE]; |
52 |
|
53 |
void (*wave_out_play) (void); |
54 |
|
55 |
static STREAM |
56 |
rdpsnd_init_packet(uint16 type, uint16 size) |
57 |
{ |
58 |
STREAM s; |
59 |
|
60 |
s = channel_init(rdpsnd_channel, size + 4); |
61 |
out_uint16_le(s, type); |
62 |
out_uint16_le(s, size); |
63 |
return s; |
64 |
} |
65 |
|
66 |
static void |
67 |
rdpsnd_send(STREAM s) |
68 |
{ |
69 |
#ifdef RDPSND_DEBUG |
70 |
printf("RDPSND send:\n"); |
71 |
hexdump(s->channel_hdr + 8, s->end - s->channel_hdr - 8); |
72 |
#endif |
73 |
|
74 |
channel_send(s, rdpsnd_channel); |
75 |
} |
76 |
|
77 |
void |
78 |
rdpsnd_send_completion(uint16 tick, uint8 packet_index) |
79 |
{ |
80 |
STREAM s; |
81 |
|
82 |
s = rdpsnd_init_packet(RDPSND_COMPLETION, 4); |
83 |
out_uint16_le(s, tick); |
84 |
out_uint8(s, packet_index); |
85 |
out_uint8(s, 0); |
86 |
s_mark_end(s); |
87 |
rdpsnd_send(s); |
88 |
} |
89 |
|
90 |
static void |
91 |
rdpsnd_process_negotiate(STREAM in) |
92 |
{ |
93 |
unsigned int in_format_count, i; |
94 |
WAVEFORMATEX *format; |
95 |
STREAM out; |
96 |
BOOL device_available = False; |
97 |
int readcnt; |
98 |
int discardcnt; |
99 |
|
100 |
in_uint8s(in, 14); /* flags, volume, pitch, UDP port */ |
101 |
in_uint16_le(in, in_format_count); |
102 |
in_uint8s(in, 4); /* pad, status, pad */ |
103 |
|
104 |
if (current_driver->wave_out_open()) |
105 |
{ |
106 |
current_driver->wave_out_close(); |
107 |
device_available = True; |
108 |
} |
109 |
|
110 |
format_count = 0; |
111 |
if (s_check_rem(in, 18 * in_format_count)) |
112 |
{ |
113 |
for (i = 0; i < in_format_count; i++) |
114 |
{ |
115 |
format = &formats[format_count]; |
116 |
in_uint16_le(in, format->wFormatTag); |
117 |
in_uint16_le(in, format->nChannels); |
118 |
in_uint32_le(in, format->nSamplesPerSec); |
119 |
in_uint32_le(in, format->nAvgBytesPerSec); |
120 |
in_uint16_le(in, format->nBlockAlign); |
121 |
in_uint16_le(in, format->wBitsPerSample); |
122 |
in_uint16_le(in, format->cbSize); |
123 |
|
124 |
/* read in the buffer of unknown use */ |
125 |
readcnt = format->cbSize; |
126 |
discardcnt = 0; |
127 |
if (format->cbSize > MAX_CBSIZE) |
128 |
{ |
129 |
fprintf(stderr, "cbSize too large for buffer: %d\n", |
130 |
format->cbSize); |
131 |
readcnt = MAX_CBSIZE; |
132 |
discardcnt = format->cbSize - MAX_CBSIZE; |
133 |
} |
134 |
in_uint8a(in, format->cb, readcnt); |
135 |
in_uint8s(in, discardcnt); |
136 |
|
137 |
if (device_available && current_driver->wave_out_format_supported(format)) |
138 |
{ |
139 |
format_count++; |
140 |
if (format_count == MAX_FORMATS) |
141 |
break; |
142 |
} |
143 |
} |
144 |
} |
145 |
|
146 |
out = rdpsnd_init_packet(RDPSND_NEGOTIATE | 0x200, 20 + 18 * format_count); |
147 |
out_uint32_le(out, 3); /* flags */ |
148 |
out_uint32(out, 0xffffffff); /* volume */ |
149 |
out_uint32(out, 0); /* pitch */ |
150 |
out_uint16(out, 0); /* UDP port */ |
151 |
|
152 |
out_uint16_le(out, format_count); |
153 |
out_uint8(out, 0x95); /* pad? */ |
154 |
out_uint16_le(out, 2); /* status */ |
155 |
out_uint8(out, 0x77); /* pad? */ |
156 |
|
157 |
for (i = 0; i < format_count; i++) |
158 |
{ |
159 |
format = &formats[i]; |
160 |
out_uint16_le(out, format->wFormatTag); |
161 |
out_uint16_le(out, format->nChannels); |
162 |
out_uint32_le(out, format->nSamplesPerSec); |
163 |
out_uint32_le(out, format->nAvgBytesPerSec); |
164 |
out_uint16_le(out, format->nBlockAlign); |
165 |
out_uint16_le(out, format->wBitsPerSample); |
166 |
out_uint16(out, 0); /* cbSize */ |
167 |
} |
168 |
|
169 |
s_mark_end(out); |
170 |
rdpsnd_send(out); |
171 |
} |
172 |
|
173 |
static void |
174 |
rdpsnd_process_servertick(STREAM in) |
175 |
{ |
176 |
uint16 tick1, tick2; |
177 |
STREAM out; |
178 |
|
179 |
/* in_uint8s(in, 4); unknown */ |
180 |
in_uint16_le(in, tick1); |
181 |
in_uint16_le(in, tick2); |
182 |
|
183 |
out = rdpsnd_init_packet(RDPSND_SERVERTICK | 0x2300, 4); |
184 |
out_uint16_le(out, tick1); |
185 |
out_uint16_le(out, tick2); |
186 |
s_mark_end(out); |
187 |
rdpsnd_send(out); |
188 |
} |
189 |
|
190 |
static void |
191 |
rdpsnd_process(STREAM s) |
192 |
{ |
193 |
uint8 type; |
194 |
uint16 datalen; |
195 |
uint32 volume; |
196 |
static uint16 tick, format; |
197 |
static uint8 packet_index; |
198 |
static BOOL awaiting_data_packet; |
199 |
static unsigned char missing_bytes[4] = { 0, 0, 0, 0 }; |
200 |
|
201 |
#ifdef RDPSND_DEBUG |
202 |
printf("RDPSND recv:\n"); |
203 |
hexdump(s->p, s->end - s->p); |
204 |
#endif |
205 |
|
206 |
if (awaiting_data_packet) |
207 |
{ |
208 |
if (format >= MAX_FORMATS) |
209 |
{ |
210 |
error("RDPSND: Invalid format index\n"); |
211 |
return; |
212 |
} |
213 |
|
214 |
if (!device_open || (format != current_format)) |
215 |
{ |
216 |
if (!device_open && !current_driver->wave_out_open()) |
217 |
{ |
218 |
rdpsnd_send_completion(tick, packet_index); |
219 |
return; |
220 |
} |
221 |
if (!current_driver->wave_out_set_format(&formats[format])) |
222 |
{ |
223 |
rdpsnd_send_completion(tick, packet_index); |
224 |
current_driver->wave_out_close(); |
225 |
device_open = False; |
226 |
return; |
227 |
} |
228 |
device_open = True; |
229 |
current_format = format; |
230 |
} |
231 |
|
232 |
/* Insert the 4 missing bytes retrieved from last RDPSND_WRITE */ |
233 |
memcpy(s->data, missing_bytes, 4); |
234 |
|
235 |
current_driver-> |
236 |
wave_out_write(rdpsnd_dsp_process |
237 |
(s, current_driver, &formats[current_format]), tick, |
238 |
packet_index); |
239 |
awaiting_data_packet = False; |
240 |
return; |
241 |
} |
242 |
|
243 |
in_uint8(s, type); |
244 |
in_uint8s(s, 1); /* unknown? */ |
245 |
in_uint16_le(s, datalen); |
246 |
|
247 |
switch (type) |
248 |
{ |
249 |
case RDPSND_WRITE: |
250 |
in_uint16_le(s, tick); |
251 |
in_uint16_le(s, format); |
252 |
in_uint8(s, packet_index); |
253 |
/* Here are our lost bytes, but why? */ |
254 |
memcpy(missing_bytes, s->end - 4, 4); |
255 |
awaiting_data_packet = True; |
256 |
break; |
257 |
case RDPSND_CLOSE: |
258 |
current_driver->wave_out_close(); |
259 |
device_open = False; |
260 |
break; |
261 |
case RDPSND_NEGOTIATE: |
262 |
rdpsnd_process_negotiate(s); |
263 |
break; |
264 |
case RDPSND_SERVERTICK: |
265 |
rdpsnd_process_servertick(s); |
266 |
break; |
267 |
case RDPSND_SET_VOLUME: |
268 |
in_uint32(s, volume); |
269 |
if (device_open) |
270 |
{ |
271 |
current_driver->wave_out_volume((volume & 0xffff), |
272 |
(volume & 0xffff0000) >> 16); |
273 |
} |
274 |
break; |
275 |
default: |
276 |
unimpl("RDPSND packet type %d\n", type); |
277 |
break; |
278 |
} |
279 |
} |
280 |
|
281 |
static BOOL |
282 |
rdpsnd_auto_open(void) |
283 |
{ |
284 |
static BOOL failed = False; |
285 |
|
286 |
if (!failed) |
287 |
{ |
288 |
struct audio_driver *auto_driver = current_driver; |
289 |
|
290 |
current_driver = drivers; |
291 |
while (current_driver != NULL) |
292 |
{ |
293 |
DEBUG(("trying %s...\n", current_driver->name)); |
294 |
if (current_driver->wave_out_open()) |
295 |
{ |
296 |
DEBUG(("selected %s\n", current_driver->name)); |
297 |
return True; |
298 |
} |
299 |
g_dsp_fd = 0; |
300 |
current_driver = current_driver->next; |
301 |
} |
302 |
|
303 |
warning("no working audio-driver found\n"); |
304 |
failed = True; |
305 |
current_driver = auto_driver; |
306 |
} |
307 |
|
308 |
return False; |
309 |
} |
310 |
|
311 |
static void |
312 |
rdpsnd_register_drivers(char *options) |
313 |
{ |
314 |
struct audio_driver **reg; |
315 |
|
316 |
/* The order of registrations define the probe-order |
317 |
when opening the device for the first time */ |
318 |
reg = &drivers; |
319 |
#if defined(RDPSND_ALSA) |
320 |
*reg = alsa_register(options); |
321 |
assert(*reg); |
322 |
reg = &((*reg)->next); |
323 |
#endif |
324 |
#if defined(RDPSND_SUN) |
325 |
*reg = sun_register(options); |
326 |
assert(*reg); |
327 |
reg = &((*reg)->next); |
328 |
#endif |
329 |
#if defined(RDPSND_OSS) |
330 |
*reg = oss_register(options); |
331 |
assert(*reg); |
332 |
reg = &((*reg)->next); |
333 |
#endif |
334 |
#if defined(RDPSND_SGI) |
335 |
*reg = sgi_register(options); |
336 |
assert(*reg); |
337 |
reg = &((*reg)->next); |
338 |
#endif |
339 |
#if defined(RDPSND_LIBAO) |
340 |
*reg = libao_register(options); |
341 |
assert(*reg); |
342 |
reg = &((*reg)->next); |
343 |
#endif |
344 |
} |
345 |
|
346 |
BOOL |
347 |
rdpsnd_init(char *optarg) |
348 |
{ |
349 |
static struct audio_driver auto_driver; |
350 |
struct audio_driver *pos; |
351 |
char *driver = NULL, *options = NULL; |
352 |
|
353 |
drivers = NULL; |
354 |
|
355 |
rdpsnd_channel = |
356 |
channel_register("rdpsnd", CHANNEL_OPTION_INITIALIZED | CHANNEL_OPTION_ENCRYPT_RDP, |
357 |
rdpsnd_process); |
358 |
|
359 |
if (rdpsnd_channel == NULL) |
360 |
{ |
361 |
error("channel_register\n"); |
362 |
return False; |
363 |
} |
364 |
|
365 |
if (optarg != NULL && strlen(optarg) > 0) |
366 |
{ |
367 |
driver = options = optarg; |
368 |
|
369 |
while (*options != '\0' && *options != ':') |
370 |
options++; |
371 |
|
372 |
if (*options == ':') |
373 |
{ |
374 |
*options = '\0'; |
375 |
options++; |
376 |
} |
377 |
|
378 |
if (*options == '\0') |
379 |
options = NULL; |
380 |
} |
381 |
|
382 |
rdpsnd_register_drivers(options); |
383 |
|
384 |
if (!driver) |
385 |
{ |
386 |
auto_driver.wave_out_open = &rdpsnd_auto_open; |
387 |
current_driver = &auto_driver; |
388 |
return True; |
389 |
} |
390 |
|
391 |
pos = drivers; |
392 |
while (pos != NULL) |
393 |
{ |
394 |
if (!strcmp(pos->name, driver)) |
395 |
{ |
396 |
DEBUG(("selected %s\n", pos->name)); |
397 |
current_driver = pos; |
398 |
return True; |
399 |
} |
400 |
pos = pos->next; |
401 |
} |
402 |
return False; |
403 |
} |
404 |
|
405 |
void |
406 |
rdpsnd_show_help(void) |
407 |
{ |
408 |
struct audio_driver *pos; |
409 |
|
410 |
rdpsnd_register_drivers(NULL); |
411 |
|
412 |
pos = drivers; |
413 |
while (pos != NULL) |
414 |
{ |
415 |
fprintf(stderr, " %s:\t%s\n", pos->name, pos->description); |
416 |
pos = pos->next; |
417 |
} |
418 |
} |
419 |
|
420 |
void |
421 |
rdpsnd_play(void) |
422 |
{ |
423 |
current_driver->wave_out_play(); |
424 |
} |
425 |
|
426 |
void |
427 |
rdpsnd_queue_write(STREAM s, uint16 tick, uint8 index) |
428 |
{ |
429 |
struct audio_packet *packet = &packet_queue[queue_hi]; |
430 |
unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE; |
431 |
|
432 |
if (next_hi == queue_lo) |
433 |
{ |
434 |
error("No space to queue audio packet\n"); |
435 |
return; |
436 |
} |
437 |
|
438 |
queue_hi = next_hi; |
439 |
|
440 |
packet->s = *s; |
441 |
packet->tick = tick; |
442 |
packet->index = index; |
443 |
|
444 |
if (!g_dsp_busy) |
445 |
current_driver->wave_out_play(); |
446 |
} |
447 |
|
448 |
struct audio_packet * |
449 |
rdpsnd_queue_current_packet(void) |
450 |
{ |
451 |
return &packet_queue[queue_lo]; |
452 |
} |
453 |
|
454 |
BOOL |
455 |
rdpsnd_queue_empty(void) |
456 |
{ |
457 |
return (queue_lo == queue_hi); |
458 |
} |
459 |
|
460 |
void |
461 |
rdpsnd_queue_init(void) |
462 |
{ |
463 |
queue_lo = queue_hi = 0; |
464 |
} |
465 |
|
466 |
void |
467 |
rdpsnd_queue_next(void) |
468 |
{ |
469 |
xfree(packet_queue[queue_lo].s.data); |
470 |
queue_lo = (queue_lo + 1) % MAX_QUEUE; |
471 |
} |
472 |
|
473 |
int |
474 |
rdpsnd_queue_next_tick(void) |
475 |
{ |
476 |
if (((queue_lo + 1) % MAX_QUEUE) != queue_hi) |
477 |
{ |
478 |
return packet_queue[(queue_lo + 1) % MAX_QUEUE].tick; |
479 |
} |
480 |
else |
481 |
{ |
482 |
return (packet_queue[queue_lo].tick + 65535) % 65536; |
483 |
} |
484 |
} |