1 /*
2 * koules.sndsrv.c - VoxWare(tm) Compatible Sound - Apr. 1995
3 * PC Speaker Compatible Sound
4 * This server is FreeBSD 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 <sys/soundcard.h>
18 #include <sys/time.h>
19 #include <signal.h>
20 #include <string.h>
21
22
23
24 char *FILENAME[] =
25 {
26 "/start.raw",
27 "/end.raw",
28 "/colize.raw",
29 "/destroy1.raw",
30 "/destroy2.raw",
31 "/creator1.raw",
32 "/creator2.raw"
33
34 };
35
36 #define NUM_SOUNDS (sizeof(FILENAME)/sizeof(char*))
37
38 signed char *sound_buffer[NUM_SOUNDS];
39 int sound_size[NUM_SOUNDS];
40 int fragsize;
41
42
43 /* Terminate: Signal Handler */
44 void
quit()45 quit ()
46 {
47 exit (0);
48 }
49
50
51
52 void
init(int argc,char ** argv)53 init (int argc, char **argv)
54 {
55 int i;
56 char s[1024];
57
58 if (argc != 3)
59 {
60 printf ("This program is only executed by koules\n");
61 exit (1);
62 }
63
64 for (i = 0; i < NUM_SOUNDS; i++)
65 {
66 s[0] = 0;
67 strcat (s, argv[1]);
68 if (s[(int) strlen (s) - 1] == '/')
69 FILENAME[i]++;
70 strcat (s, FILENAME[i]);
71 FILENAME[i] = malloc ((int) strlen (s) + 1);
72 strcpy (FILENAME[i], s);
73 sound_buffer[i] = NULL;
74 sound_size[i] = 0;
75 }
76
77 signal (SIGTERM, quit); /* Setup Terminate Signal Handler */
78 }
79
80
81 /*
82 Setup DSP: Opens /dev/dsp or /dev/pcdsp
83 Sets fragment size on VoxWare
84 Sets speed to 8000hz
85 Should set mono mode
86 Error checking
87 */
88 int
setup_dsp(char * dspdev,int * is_pcsp)89 setup_dsp (char *dspdev, int *is_pcsp)
90 {
91 int dsp, frag, value;
92 int mixer;
93
94 dsp = open (dspdev, O_RDWR);
95 if (dsp < 1)
96 {
97 fprintf (stderr, "koules.sndsrv: Couldn't open DSP %s\n", dspdev);
98 return -1;
99 }
100
101 *is_pcsp = 0;
102 fragsize = 0;
103
104 frag = 0x00020009; /* try 512 bytes, for 1/16 second frag size */
105 ioctl (dsp, SNDCTL_DSP_SETFRAGMENT, &frag);
106 value = 8010;
107 if (ioctl (dsp, SNDCTL_DSP_SPEED, &value))
108 {
109 fprintf (stderr, "koules.sndsrv: Couldn't set DSP rate!\n");
110 };
111 value = 0;
112 ioctl (dsp, SNDCTL_DSP_STEREO, &value);
113 ioctl (dsp, SNDCTL_DSP_GETBLKSIZE, &fragsize);
114 fprintf (stderr, "koules.sndsrv: fragment set to %d\n", fragsize);
115
116 if (!fragsize)
117 {
118 /* Don't Assume just because you can't set the fragment, use proper IOCTL */
119 fprintf (stderr, "koules.sndsrv: Couldn't set Fragment Size.\nAssuming PC Speaker!\n");
120 fragsize = 128;
121 *is_pcsp = 1;
122 }
123 else
124 {
125 mixer = open ("/dev/mixer", O_RDWR | O_NONBLOCK);
126 if (mixer == -1)
127 {
128 fprintf (stderr, "koules.sndsrv: Couldn't open mixer %s\n", "/dev/mixer");
129 return (-1);
130 };
131 #if 0
132 value = 0x6464;
133 ioctl (mixer, SOUND_MIXER_WRITE_PCM, &value);
134 ioctl (mixer, SOUND_MIXER_WRITE_VOLUME, &value); /*what does this do? */
135 #endif
136 close (mixer);
137
138 }
139
140 return dsp;
141 }
142
143 /*
144 This just keeps the pipe from breaking...
145 Eventually I'll look at the koules signal handlers and
146 just trap this.
147 */
148 int
do_nothing(void)149 do_nothing (void)
150 {
151 fprintf (stderr, "koules.sndsrv: doing nothing, something is broken\n");
152 while (1)
153 sleep (5);
154 }
155
156 int
read_sound(int k)157 read_sound (int k)
158 {
159 int i, fd, size;
160
161 /*fprintf(stderr,"loading sound %d, %s\n",k,FILENAME[k]); */
162
163 fd = open (FILENAME[k], O_RDONLY);
164 if (fd <= 0)
165 {
166 fprintf (stderr, "koules.sndsrv: The sound %s could not be opened\n", FILENAME[k]);
167 sound_size[k] = -1;
168 return (0);
169 };
170 size = lseek (fd, 0, SEEK_END);
171 sound_size[k] = (size / fragsize) + 1; /*size in fragments */
172 sound_buffer[k] = malloc (sound_size[k] * fragsize);
173 if (sound_buffer[k] == NULL)
174 {
175 fprintf (stderr, "koules.sndsrv: couldn't malloc memory for sound\n");
176 sound_size[k] = -1;
177 close (fd);
178 return (0);
179 };
180 lseek (fd, 0, SEEK_SET);
181 read (fd, sound_buffer[k], size);
182 close (fd);
183 for (i = 0; i < size; i++)
184 sound_buffer[k][i] ^= 0x80;
185 memset (sound_buffer[k] + size, 0, sound_size[k] * fragsize - size);
186
187 /*fprintf(stderr,"sound has been loaded, %d bytes\n",size); *//*DEBUG */
188 return (1);
189 }
190
191
192 void
do_everything(int dsp,int is_pcsp)193 do_everything (int dsp, int is_pcsp)
194 {
195 char k;
196 int i, j;
197 int terminate = -1; /* Which Sound to Terminate */
198 int playing[16]; /* Sound numbers that we are playing */
199 int position[16]; /* Current position in each sound file */
200 int playnum = 0; /* Number of sounds currently being played */
201 unsigned char final[512]; /* Final Mixing Buffer */
202 int premix[512];
203 char *sample;
204
205 for (;;)
206 {
207 terminate = -1;
208 /* Try to open a new sound if we get an integer on the 'in' pipe */
209 i = read (STDIN_FILENO, &k, sizeof (k));
210 if (i == 0)
211 { /* EOF on pipe means parent has closed its end */
212 /*fprintf(stderr,"koules.sndsrv: shutting down\n"); */
213 kill (getpid (), SIGTERM);
214 };
215 if (i != -1)
216 { /* there was something in the pipe */
217 /*fprintf(stderr,"Just read a %d from pipe\n",(int)k); *//*DEBUG */
218 /* Negative means terminate the FIRST sound in the buffer */
219 if (k < 0)
220 {
221 /*fprintf(stderr,"terminating sound\n"); *//*DEBUG */
222 terminate = 0;
223 }
224 else
225 {
226 if (sound_size[k] == 0)
227 read_sound (k);
228 if (sound_size[k] > 0 && playnum < 16)
229 {
230 position[playnum] = 0;
231 playing[playnum++] = k;
232 /*fprintf(stderr,"sound %d added to play queue\n",playnum-1); *//*DEBUG */
233 };
234 };
235 };
236
237 /* terminate a sound if necessary */
238 for (i = 0; i < playnum; i++)
239 {
240 if ((position[i] == sound_size[playing[i]]) || (terminate == i))
241 {
242 /*fprintf(stderr,"finished playing sound %d\n",i); *//*DEBUG */
243 /*fprintf(stderr,"is was at position %d\n",position[i]); *//*DEBUG */
244 memmove (playing + i, playing + i + 1, (playnum - i) * sizeof (int));
245 memmove (position + i, position + i + 1, (playnum - i) * sizeof (int));
246 playnum--;
247 i--;
248 };
249 };
250
251 if (playnum)
252 {
253 /* Mix each sound into the final buffer */
254 memset (premix, 0, sizeof (premix));
255 for (i = 0; i < playnum; i++)
256 {
257 sample = sound_buffer[playing[i]] + position[i] * fragsize;
258 for (j = 0; j < fragsize; j++)
259 {
260 premix[j] += *(sample + j);
261 };
262 position[i]++;
263 };
264 for (i = 0; i < fragsize; i++)
265 final[i] = (premix[i] > 255) ? 255 : (premix[i] < -256 ? 0 : (premix[i] >> 1) + 128);
266 }
267 else
268 {
269 /*
270 We have no sounds to play
271 Just fill the buffer with silence and maybe play it
272 */
273 memset (final, 128, sizeof (final));
274 };
275 write (dsp, final, fragsize);
276 /*
277 The sound server is in a tight loop, EXCEPT for this
278 write which blocks. Any optimizations in the above
279 code would really be helpful. Right now the server
280 takes up to 7% cpu on a 486DX/50.
281 */
282 }
283 }
284
285
286
287 void
main(argc,argv)288 main (argc, argv)
289 int argc;
290 char **argv;
291 {
292 int dsp, is_pcsp, ppid;
293 char filename[512];
294
295 fcntl (STDIN_FILENO, F_SETFL, O_NONBLOCK);
296 init (argc, argv);
297 dsp = setup_dsp (argv[2], &is_pcsp);
298
299 if (!dsp)
300 do_nothing ();
301
302 do_everything (dsp, is_pcsp);
303 }
304