1 |
astrand |
963 |
/* -*- c-basic-offset: 8 -*- |
2 |
matthewc |
475 |
rdesktop: A Remote Desktop Protocol client. |
3 |
|
|
Sound Channel Process Functions - Open Sound System |
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 "rdesktop.h" |
23 |
|
|
#include <unistd.h> |
24 |
|
|
#include <fcntl.h> |
25 |
|
|
#include <errno.h> |
26 |
stargo |
510 |
#include <sys/time.h> |
27 |
matthewc |
475 |
#include <sys/ioctl.h> |
28 |
|
|
#include <sys/soundcard.h> |
29 |
|
|
|
30 |
|
|
#define MAX_QUEUE 10 |
31 |
|
|
|
32 |
|
|
int g_dsp_fd; |
33 |
stargo |
504 |
BOOL g_dsp_busy = False; |
34 |
stargo |
510 |
static int g_snd_rate; |
35 |
|
|
static short g_samplewidth; |
36 |
stargo |
761 |
static BOOL g_driver_broken = False; |
37 |
matthewc |
475 |
|
38 |
astrand |
499 |
static struct audio_packet |
39 |
|
|
{ |
40 |
matthewc |
475 |
struct stream s; |
41 |
|
|
uint16 tick; |
42 |
|
|
uint8 index; |
43 |
|
|
} packet_queue[MAX_QUEUE]; |
44 |
|
|
static unsigned int queue_hi, queue_lo; |
45 |
|
|
|
46 |
|
|
BOOL |
47 |
|
|
wave_out_open(void) |
48 |
|
|
{ |
49 |
stargo |
751 |
char *dsp_dev = getenv("AUDIODEV"); |
50 |
matthewc |
475 |
|
51 |
stargo |
751 |
if (dsp_dev == NULL) |
52 |
|
|
{ |
53 |
astrand |
974 |
dsp_dev = xstrdup("/dev/dsp"); |
54 |
stargo |
751 |
} |
55 |
|
|
|
56 |
astrand |
499 |
if ((g_dsp_fd = open(dsp_dev, O_WRONLY | O_NONBLOCK)) == -1) |
57 |
matthewc |
475 |
{ |
58 |
|
|
perror(dsp_dev); |
59 |
|
|
return False; |
60 |
|
|
} |
61 |
|
|
|
62 |
|
|
/* Non-blocking so that user interface is responsive */ |
63 |
astrand |
499 |
fcntl(g_dsp_fd, F_SETFL, fcntl(g_dsp_fd, F_GETFL) | O_NONBLOCK); |
64 |
matthewc |
475 |
return True; |
65 |
|
|
} |
66 |
|
|
|
67 |
|
|
void |
68 |
|
|
wave_out_close(void) |
69 |
|
|
{ |
70 |
|
|
close(g_dsp_fd); |
71 |
|
|
} |
72 |
|
|
|
73 |
|
|
BOOL |
74 |
astrand |
499 |
wave_out_format_supported(WAVEFORMATEX * pwfx) |
75 |
matthewc |
475 |
{ |
76 |
|
|
if (pwfx->wFormatTag != WAVE_FORMAT_PCM) |
77 |
|
|
return False; |
78 |
|
|
if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2)) |
79 |
|
|
return False; |
80 |
|
|
if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16)) |
81 |
|
|
return False; |
82 |
|
|
|
83 |
|
|
return True; |
84 |
|
|
} |
85 |
|
|
|
86 |
|
|
BOOL |
87 |
astrand |
499 |
wave_out_set_format(WAVEFORMATEX * pwfx) |
88 |
matthewc |
475 |
{ |
89 |
stargo |
761 |
int stereo, format, fragments; |
90 |
matthewc |
475 |
|
91 |
|
|
ioctl(g_dsp_fd, SNDCTL_DSP_RESET, NULL); |
92 |
|
|
ioctl(g_dsp_fd, SNDCTL_DSP_SYNC, NULL); |
93 |
|
|
|
94 |
|
|
if (pwfx->wBitsPerSample == 8) |
95 |
|
|
format = AFMT_U8; |
96 |
|
|
else if (pwfx->wBitsPerSample == 16) |
97 |
|
|
format = AFMT_S16_LE; |
98 |
|
|
|
99 |
stargo |
510 |
g_samplewidth = pwfx->wBitsPerSample / 8; |
100 |
|
|
|
101 |
matthewc |
475 |
if (ioctl(g_dsp_fd, SNDCTL_DSP_SETFMT, &format) == -1) |
102 |
|
|
{ |
103 |
|
|
perror("SNDCTL_DSP_SETFMT"); |
104 |
|
|
close(g_dsp_fd); |
105 |
|
|
return False; |
106 |
|
|
} |
107 |
|
|
|
108 |
stargo |
760 |
if (pwfx->nChannels == 2) |
109 |
matthewc |
475 |
{ |
110 |
stargo |
760 |
stereo = 1; |
111 |
|
|
g_samplewidth *= 2; |
112 |
|
|
} |
113 |
|
|
else |
114 |
|
|
{ |
115 |
|
|
stereo = 0; |
116 |
|
|
} |
117 |
|
|
|
118 |
|
|
if (ioctl(g_dsp_fd, SNDCTL_DSP_STEREO, &stereo) == -1) |
119 |
|
|
{ |
120 |
matthewc |
475 |
perror("SNDCTL_DSP_CHANNELS"); |
121 |
|
|
close(g_dsp_fd); |
122 |
|
|
return False; |
123 |
|
|
} |
124 |
|
|
|
125 |
stargo |
510 |
g_snd_rate = pwfx->nSamplesPerSec; |
126 |
|
|
if (ioctl(g_dsp_fd, SNDCTL_DSP_SPEED, &g_snd_rate) == -1) |
127 |
|
|
{ |
128 |
matthewc |
475 |
perror("SNDCTL_DSP_SPEED"); |
129 |
|
|
close(g_dsp_fd); |
130 |
|
|
return False; |
131 |
|
|
} |
132 |
|
|
|
133 |
stargo |
761 |
/* try to get 7 fragments of 2^12 bytes size */ |
134 |
|
|
fragments = (7 << 16) + 12; |
135 |
|
|
ioctl(g_dsp_fd, SNDCTL_DSP_SETFRAGMENT, &fragments); |
136 |
|
|
|
137 |
|
|
if (!g_driver_broken) |
138 |
|
|
{ |
139 |
|
|
audio_buf_info info; |
140 |
|
|
|
141 |
astrand |
801 |
memset(&info, 0, sizeof(info)); |
142 |
stargo |
761 |
if (ioctl(g_dsp_fd, SNDCTL_DSP_GETOSPACE, &info) == -1) |
143 |
|
|
{ |
144 |
|
|
perror("SNDCTL_DSP_GETOSPACE"); |
145 |
|
|
close(g_dsp_fd); |
146 |
|
|
return False; |
147 |
|
|
} |
148 |
|
|
|
149 |
|
|
if (info.fragments == 0 || info.fragstotal == 0 || info.fragsize == 0) |
150 |
|
|
{ |
151 |
|
|
fprintf(stderr, |
152 |
|
|
"Broken OSS-driver detected: fragments: %d, fragstotal: %d, fragsize: %d\n", |
153 |
|
|
info.fragments, info.fragstotal, info.fragsize); |
154 |
|
|
g_driver_broken = True; |
155 |
|
|
} |
156 |
|
|
} |
157 |
|
|
|
158 |
matthewc |
475 |
return True; |
159 |
|
|
} |
160 |
|
|
|
161 |
|
|
void |
162 |
stargo |
491 |
wave_out_volume(uint16 left, uint16 right) |
163 |
|
|
{ |
164 |
stargo |
509 |
static BOOL use_dev_mixer = False; |
165 |
stargo |
491 |
uint32 volume; |
166 |
stargo |
509 |
int fd_mix = -1; |
167 |
stargo |
491 |
|
168 |
astrand |
499 |
volume = left / (65536 / 100); |
169 |
|
|
volume |= right / (65536 / 100) << 8; |
170 |
stargo |
509 |
|
171 |
|
|
if (use_dev_mixer) |
172 |
|
|
{ |
173 |
astrand |
532 |
if ((fd_mix = open("/dev/mixer", O_RDWR | O_NONBLOCK)) == -1) |
174 |
stargo |
509 |
{ |
175 |
|
|
perror("open /dev/mixer"); |
176 |
|
|
return; |
177 |
|
|
} |
178 |
|
|
|
179 |
|
|
if (ioctl(fd_mix, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1) |
180 |
|
|
{ |
181 |
|
|
perror("MIXER_WRITE(SOUND_MIXER_PCM)"); |
182 |
|
|
return; |
183 |
|
|
} |
184 |
|
|
|
185 |
|
|
close(fd_mix); |
186 |
|
|
} |
187 |
|
|
|
188 |
stargo |
491 |
if (ioctl(g_dsp_fd, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1) |
189 |
|
|
{ |
190 |
|
|
perror("MIXER_WRITE(SOUND_MIXER_PCM)"); |
191 |
stargo |
509 |
use_dev_mixer = True; |
192 |
stargo |
491 |
return; |
193 |
|
|
} |
194 |
|
|
} |
195 |
|
|
|
196 |
|
|
void |
197 |
matthewc |
475 |
wave_out_write(STREAM s, uint16 tick, uint8 index) |
198 |
|
|
{ |
199 |
matthewc |
476 |
struct audio_packet *packet = &packet_queue[queue_hi]; |
200 |
|
|
unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE; |
201 |
matthewc |
475 |
|
202 |
|
|
if (next_hi == queue_lo) |
203 |
|
|
{ |
204 |
|
|
error("No space to queue audio packet\n"); |
205 |
|
|
return; |
206 |
|
|
} |
207 |
|
|
|
208 |
|
|
queue_hi = next_hi; |
209 |
|
|
|
210 |
|
|
packet->s = *s; |
211 |
|
|
packet->tick = tick; |
212 |
|
|
packet->index = index; |
213 |
stargo |
491 |
packet->s.p += 4; |
214 |
matthewc |
475 |
|
215 |
|
|
/* we steal the data buffer from s, give it a new one */ |
216 |
jsorg71 |
778 |
s->data = (uint8 *) malloc(s->size); |
217 |
matthewc |
475 |
|
218 |
|
|
if (!g_dsp_busy) |
219 |
|
|
wave_out_play(); |
220 |
|
|
} |
221 |
|
|
|
222 |
|
|
void |
223 |
|
|
wave_out_play(void) |
224 |
|
|
{ |
225 |
|
|
struct audio_packet *packet; |
226 |
|
|
ssize_t len; |
227 |
|
|
STREAM out; |
228 |
stargo |
510 |
static long startedat_us; |
229 |
|
|
static long startedat_s; |
230 |
|
|
static BOOL started = False; |
231 |
|
|
struct timeval tv; |
232 |
stargo |
761 |
audio_buf_info info; |
233 |
matthewc |
475 |
|
234 |
|
|
while (1) |
235 |
|
|
{ |
236 |
|
|
if (queue_lo == queue_hi) |
237 |
|
|
{ |
238 |
|
|
g_dsp_busy = 0; |
239 |
|
|
return; |
240 |
|
|
} |
241 |
|
|
|
242 |
|
|
packet = &packet_queue[queue_lo]; |
243 |
|
|
out = &packet->s; |
244 |
|
|
|
245 |
stargo |
510 |
if (!started) |
246 |
|
|
{ |
247 |
|
|
gettimeofday(&tv, NULL); |
248 |
|
|
startedat_us = tv.tv_usec; |
249 |
|
|
startedat_s = tv.tv_sec; |
250 |
|
|
started = True; |
251 |
|
|
} |
252 |
|
|
|
253 |
stargo |
761 |
len = out->end - out->p; |
254 |
|
|
|
255 |
|
|
if (!g_driver_broken) |
256 |
|
|
{ |
257 |
astrand |
801 |
memset(&info, 0, sizeof(info)); |
258 |
stargo |
761 |
if (ioctl(g_dsp_fd, SNDCTL_DSP_GETOSPACE, &info) == -1) |
259 |
|
|
{ |
260 |
|
|
perror("SNDCTL_DSP_GETOSPACE"); |
261 |
|
|
return; |
262 |
|
|
} |
263 |
|
|
|
264 |
|
|
if (info.fragments == 0) |
265 |
|
|
{ |
266 |
|
|
g_dsp_busy = 1; |
267 |
|
|
return; |
268 |
|
|
} |
269 |
|
|
|
270 |
|
|
if (info.fragments * info.fragsize < len |
271 |
|
|
&& info.fragments * info.fragsize > 0) |
272 |
|
|
{ |
273 |
|
|
len = info.fragments * info.fragsize; |
274 |
|
|
} |
275 |
|
|
} |
276 |
|
|
|
277 |
|
|
|
278 |
|
|
len = write(g_dsp_fd, out->p, len); |
279 |
matthewc |
475 |
if (len == -1) |
280 |
|
|
{ |
281 |
|
|
if (errno != EWOULDBLOCK) |
282 |
|
|
perror("write audio"); |
283 |
|
|
g_dsp_busy = 1; |
284 |
|
|
return; |
285 |
|
|
} |
286 |
|
|
|
287 |
|
|
out->p += len; |
288 |
|
|
if (out->p == out->end) |
289 |
|
|
{ |
290 |
stargo |
510 |
long long duration; |
291 |
|
|
long elapsed; |
292 |
astrand |
532 |
|
293 |
stargo |
510 |
gettimeofday(&tv, NULL); |
294 |
astrand |
532 |
duration = (out->size * (1000000 / (g_samplewidth * g_snd_rate))); |
295 |
|
|
elapsed = (tv.tv_sec - startedat_s) * 1000000 + (tv.tv_usec - startedat_us); |
296 |
stargo |
510 |
|
297 |
stargo |
753 |
if (elapsed >= (duration * 85) / 100) |
298 |
stargo |
510 |
{ |
299 |
|
|
rdpsnd_send_completion(packet->tick, packet->index); |
300 |
|
|
free(out->data); |
301 |
|
|
queue_lo = (queue_lo + 1) % MAX_QUEUE; |
302 |
|
|
started = False; |
303 |
|
|
} |
304 |
|
|
else |
305 |
|
|
{ |
306 |
|
|
g_dsp_busy = 1; |
307 |
|
|
return; |
308 |
|
|
} |
309 |
matthewc |
475 |
} |
310 |
|
|
} |
311 |
|
|
} |