1 /*
2 * koules.sndsrv.c - VoxWare(tm) Compatible Sound - Apr. 1995
3 * PC Speaker Compatible Sound
4 * This server is Linux Specific.
5 *
6 * Copyright 1994-1995 Sujal M. Patel (smpatel@wam.umd.edu)
7 * Conditions in "copyright.h"
8 *
9 * Modified for koules and bugfixed by Jan Hubicka
10 */
11
12 #include <stdio.h>
13 #include <stdlib.h>
14 #include <unistd.h>
15 #include <fcntl.h>
16 #include <sys/ioctl.h>
17 #include <linux/soundcard.h>
18 #include "linux_pcsp.h" /* /usr/include/linux/pcsp.h */
19 #include <sys/time.h>
20 #include <signal.h>
21 #include <string.h>
22
23
24
25 char *FILENAME[] =
26 {
27 "/start.raw",
28 "/end.raw",
29 "/colize.raw",
30 "/destroy1.raw",
31 "/destroy2.raw",
32 "/creator1.raw",
33 "/creator2.raw"
34
35 };
36
37 #define NUM_SOUNDS (sizeof(FILENAME)/sizeof(char*))
38
39 signed char *sound_buffer[NUM_SOUNDS];
40 int sound_size[NUM_SOUNDS];
41 int fragsize;
42
43
44 /* Terminate: Signal Handler */
45 void
quit()46 quit ()
47 {
48 exit (0);
49 }
50
51
52
53 void
init(int argc,char ** argv)54 init (int argc, char **argv)
55 {
56 int i;
57 char s[1024];
58
59 if (argc != 3)
60 {
61 printf ("This program is only executed by koules\n");
62 exit (1);
63 }
64
65 for (i = 0; i < NUM_SOUNDS; i++)
66 {
67 s[0] = 0;
68 strcat (s, argv[1]);
69 if (s[(int) strlen (s) - 1] == '/')
70 FILENAME[i]++;
71 strcat (s, FILENAME[i]);
72 FILENAME[i] = malloc ((int) strlen (s) + 1);
73 strcpy (FILENAME[i], s);
74 sound_buffer[i] = NULL;
75 sound_size[i] = 0;
76 }
77
78 signal (SIGTERM, quit); /* Setup Terminate Signal Handler */
79 }
80
81
82 /*
83 Setup DSP: Opens /dev/dsp or /dev/pcdsp
84 Sets fragment size on VoxWare
85 Sets speed to 8000hz
86 Should set mono mode
87 Error checking
88 */
89 int
setup_dsp(char * dspdev,int * is_pcsp)90 setup_dsp (char *dspdev, int *is_pcsp)
91 {
92 int dsp, frag, value;
93
94 dsp = open (dspdev, O_WRONLY);
95 if (dsp < 0)
96 {
97 fprintf (stderr, "koules.sndsrv: Couldn't open DSP >%s<\n", dspdev);
98 perror("error");
99 return -1;
100 }
101 *is_pcsp = 0;
102 fragsize = 0;
103
104 frag = 0x00020007; /* try 512 bytes, for 1/16 second frag size */
105 ioctl(dsp, SNDCTL_DSP_SAMPLESIZE, &value);
106 if(ioctl (dsp, SNDCTL_DSP_SETFRAGMENT, &frag))
107 {
108 fprintf (stderr, "koules.sndsrv: Couldn't set DSP fragment. Sounds will be ugly and delayed. Use USS lite driver!\n");
109 }
110 value = 8010;
111 if (ioctl (dsp, SNDCTL_DSP_SPEED, &value))
112 {
113 fprintf (stderr, "koules.sndsrv: Couldn't set DSP rate!\n");
114 };
115 value = 0;
116 ioctl (dsp, SNDCTL_DSP_STEREO, &value);
117 value = 1;
118 ioctl (dsp, SNDCTL_DSP_SYNC, &value);
119 ioctl (dsp, SNDCTL_DSP_GETBLKSIZE, &fragsize);
120 value=8;
121 ioctl(dsp, SNDCTL_DSP_SAMPLESIZE, &value);
122
123 if (!fragsize)
124 {
125 /* Don't Assume just because you can't set the fragment, use proper IOCTL */
126 fprintf (stderr, "koules.sndsrv: Couldn't set Fragment Size.\nAssuming PC Speaker!\n");
127 fragsize = 128;
128 *is_pcsp = 1;
129 }
130
131 return dsp;
132 }
133
134 /*
135 This just keeps the pipe from breaking...
136 Eventually I'll look at the koules signal handlers and
137 just trap this.
138 */
139 int
do_nothing(void)140 do_nothing (void)
141 {
142 fprintf (stderr, "koules.sndsrv: doing nothing, something is broken\n");
143 while (1)
144 sleep (5);
145 }
146
147 int
read_sound(int k)148 read_sound (int k)
149 {
150 int i, fd, size;
151
152 fd = open (FILENAME[k], O_RDONLY);
153 if (fd <= 0)
154 {
155 fprintf (stderr, "koules.sndsrv: The sound %s number %i could not be opened\n", FILENAME[k], k);
156 sound_size[k] = -1;
157 return (0);
158 }
159 size = lseek (fd, 0, SEEK_END);
160 sound_size[k] = (size / fragsize) + 1; /*size in fragments */
161 sound_buffer[k] = malloc ((sound_size[k] + 1) * fragsize);
162 if (sound_buffer[k] == NULL)
163 {
164 fprintf (stderr, "koules.sndsrv: couldn't malloc memory for sound\n");
165 sound_size[k] = -1;
166 close (fd);
167 return (0);
168 };
169 lseek (fd, 0, SEEK_SET);
170 read (fd, sound_buffer[k], size);
171 close (fd);
172 for (i = 0; i < size; i++)
173 sound_buffer[k][i] ^= 0x80;
174 memset (sound_buffer[k] + size, 0, sound_size[k] * fragsize - size);
175
176 /*fprintf(stderr,"sound has been loaded, %d bytes\n",size); *//*DEBUG */
177 return (1);
178 }
179
180
181 void
do_everything(int dsp,int is_pcsp)182 do_everything (int dsp, int is_pcsp)
183 {
184 char k;
185 int i, j;
186 int terminate = -1; /* Which Sound to Terminate */
187 int playing[16]; /* Sound numbers that we are playing */
188 int position[16]; /* Current position in each sound file */
189 int playnum = 0; /* Number of sounds currently being played */
190 unsigned char final[512]; /* Final Mixing Buffer */
191 int premix[512];
192 char *sample;
193 audio_buf_info info;
194
195 for (;;)
196 {
197 terminate = -1;
198 /* Try to open a new sound if we get an integer on the 'in' pipe */
199 i = read (STDIN_FILENO, &k, sizeof (k));
200 if (i == 0)
201 { /* EOF on pipe means parent has closed its end */
202 fprintf(stderr,"koules.sndsrv: shutting down\n");
203 kill (getpid (), SIGTERM);
204 exit(-1);
205 };
206 if (i != -1)
207 { /* there was something in the pipe */
208 /*fprintf(stderr,"Just read a %d from pipe\n",(int)k); *//*DEBUG */
209 /* Negative means terminate the FIRST sound in the buffer */
210 if (k < 0)
211 {
212 /*fprintf(stderr,"terminating sound\n"); *//*DEBUG */
213 terminate = 0;
214 }
215 else
216 {
217 if (sound_size[(int) k] == 0)
218 read_sound (k);
219 if (sound_size[(int) k] > 0 && playnum < 16)
220 {
221 position[playnum] = 0;
222 playing[playnum++] = k;
223 /*fprintf(stderr,"sound %d added to play queue\n",playnum-1); *//*DEBUG */
224 };
225 };
226 };
227
228 /* terminate a sound if necessary */
229 for (i = 0; i < playnum; i++)
230 {
231 if ((position[i] == sound_size[playing[i]]) || (terminate == i))
232 {
233 /*fprintf(stderr,"finished playing sound %d\n",i); *//*DEBUG */
234 /*fprintf(stderr,"is was at position %d\n",position[i]); *//*DEBUG */
235 memmove (playing + i, playing + i + 1, (playnum - i) * sizeof (int));
236 memmove (position + i, position + i + 1, (playnum - i) * sizeof (int));
237 playnum--;
238 i--;
239 };
240 };
241
242 if (playnum)
243 {
244 /* Mix each sound into the final buffer */
245 memset (premix, 0, sizeof (premix));
246 for (i = 0; i < playnum; i++)
247 {
248 sample = sound_buffer[playing[i]] + position[i] * fragsize;
249 for (j = 0; j < fragsize; j++)
250 {
251 premix[j] += *(sample + j);
252 };
253 position[i]++;
254 };
255 for (i = 0; i < fragsize; i++)
256 final[i] = (premix[i] > 255) ? 255 : (premix[i] < -256 ? 0 : (premix[i] >> 1) + 128);
257 }
258 else
259 {
260 /*
261 We have no sounds to play
262 Just fill the buffer with silence and maybe play it
263 */
264 memset (final, 128, sizeof (final));
265 };
266 write (dsp, final, fragsize);
267 if(!ioctl(dsp,SNDCTL_DSP_GETOSPACE,&info)) { /*this is code
268 drivers that does not allow to set number of
269 fragments to 2. (ultrasound project?)*/
270 while((int)info.fragments<((int)info.fragstotal-2)) {
271 usleep(1000000*info.fragsize/8010);
272 ioctl(dsp,SNDCTL_DSP_GETOSPACE,&info);
273 }
274 }
275 /*
276 The sound server is in a tight loop, EXCEPT for this
277 write which blocks. Any optimizations in the above
278 code would really be helpful. Right now the server
279 takes up to 7% cpu on a 486DX/50.
280 */
281 }
282 }
283
284
285
286 int
main(argc,argv)287 main (argc, argv)
288 int argc;
289 char **argv;
290 {
291 int dsp, is_pcsp;
292
293 fcntl (STDIN_FILENO, F_SETFL, O_NONBLOCK);
294 init (argc, argv);
295 dsp = setup_dsp (argv[2], &is_pcsp);
296 if (dsp<0) {
297 fprintf(stderr,"Sound server: exit\n");
298 exit(0);
299 }
300 printf("2\n");
301
302 do_everything (dsp, is_pcsp);
303 printf("3\n");
304 return 1;
305 }
306