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comparison paradise.sndsrv.sun.c @ 3:5a977ccbc7a9 default tip

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author darius
date Sat, 06 Dec 1997 05:41:29 +0000
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2:fba0b6e6cdc7 3:5a977ccbc7a9
1 /*
2 * paradise.sndsrv.c - VoxWare(tm) Compatible Sound - July 1996
3 * This server is SunOS Specific.
4 * Sujal M. Patel (smpatel@umiacs.umd.edu)
5 *
6 * Copyright (c) 1994-1996, Sujal M. Patel
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * $Id: paradise.sndsrv.sun.c,v 1.1.1.1 1997/12/06 05:41:29 darius Exp $
31 */
32
33
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <unistd.h>
37 #include <fcntl.h>
38 #include <sys/ioctl.h>
39 #include <sys/time.h>
40 #include <signal.h>
41 #include <string.h>
42
43 char *FILENAME[] = {
44 "/explode.raw",
45 "/cloak.raw",
46 "/firetorp.raw",
47 "/phaser.raw",
48 "/plasma.raw",
49 "/shield.raw",
50 "/torphit.raw",
51 "/explode_big.raw",
52 "/paradise.raw",
53 "/thermal.raw",
54 "/redalert.raw"
55 };
56
57 #define NUM_SOUNDS (sizeof(FILENAME)/sizeof(char*))
58
59 signed char *sound_buffer[NUM_SOUNDS];
60 int sound_size[NUM_SOUNDS];
61 int fragsize;
62
63
64 /* Terminate: Signal Handler */
65 void
66 quit ()
67 {
68 exit (0);
69 }
70
71
72
73 void
74 init (int argc, char **argv)
75 {
76 int i;
77 char s[1024];
78
79 if (argc != 3)
80 {
81 printf ("This program is only executed by Paradise\n");
82 exit (1);
83 }
84
85 for (i = 0; i < NUM_SOUNDS; i++)
86 {
87 s[0] = 0;
88 strcat (s, argv[1]);
89 if (s[(int) strlen (s) - 1] == '/')
90 FILENAME[i]++;
91 strcat (s, FILENAME[i]);
92 FILENAME[i] = malloc ((int) strlen (s) + 1);
93 strcpy (FILENAME[i], s);
94 sound_buffer[i] = NULL;
95 sound_size[i] = 0;
96 }
97
98 signal (SIGTERM, quit); /* Setup Terminate Signal Handler */
99 }
100
101
102 /*
103 Setup DSP: Opens /dev/audio
104 Sets fragment size to 512
105 Error checking
106 */
107 int
108 setup_dsp (char *dspdev)
109 {
110 int dsp, frag, value;
111 int mixer;
112
113 dsp = open (dspdev, O_RDWR);
114 if (dsp < 1)
115 {
116 fprintf (stderr, "paradise.sndsrv: Couldn't open device %s\n", dspdev);
117 return -1;
118 }
119
120 fragsize = 512;
121
122 return dsp;
123 }
124
125 /*
126 This just keeps the pipe from breaking...
127 Eventually I'll look at the paradise signal handlers and
128 just trap this.
129 */
130 int
131 do_nothing (void)
132 {
133 while (1)
134 sleep (5);
135 }
136
137 int
138 read_sound (int k)
139 {
140 int i, fd, size;
141
142 /*fprintf(stderr,"loading sound %d, %s\n",k,FILENAME[k]); */
143
144 fd = open (FILENAME[k], O_RDONLY);
145 if (fd <= 0)
146 {
147 fprintf (stderr, "paradise.sndsrv: The sound %s could not be opened\n", FILENAME[k]);
148 sound_size[k] = -1;
149 return (0);
150 };
151 size = lseek (fd, 0, SEEK_END);
152 sound_size[k] = (size / fragsize) + 1; /*size in fragments */
153 sound_buffer[k] = malloc (sound_size[k] * fragsize);
154 if (sound_buffer[k] == NULL)
155 {
156 fprintf (stderr, "paradise.sndsrv: couldn't malloc memory for sound\n");
157 sound_size[k] = -1;
158 close (fd);
159 return (0);
160 };
161 lseek (fd, 0, SEEK_SET);
162 read (fd, sound_buffer[k], size);
163 close (fd);
164 for (i = 0; i < size; i++)
165 sound_buffer[k][i] ^= 0x80;
166 bzero (sound_buffer[k] + size, sound_size[k] * fragsize - size);
167
168 /*fprintf(stderr,"sound has been loaded, %d bytes\n",size); *//*DEBUG */
169 return (1);
170 }
171
172
173 void
174 do_everything (int dsp)
175 {
176 char k;
177 int i, j;
178 int terminate = -1; /* Which Sound to Terminate */
179 int playing[16]; /* Sound numbers that we are playing */
180 int position[16]; /* Current position in each sound file */
181 int playnum = 0; /* Number of sounds currently being played */
182 unsigned char final[512]; /* Final Mixing Buffer */
183 int premix[512];
184 char *sample;
185
186 for (;;)
187 {
188 terminate = -1;
189 /* Try to open a new sound if we get an integer on the 'in' pipe */
190 i = read (STDIN_FILENO, &k, sizeof (k));
191 if (i == 0)
192 { /* EOF on pipe means parent has closed its end */
193 /*fprintf(stderr,"paradise.sndsrv: shutting down\n"); */
194 kill (getpid (), SIGTERM);
195 };
196 if (i != -1)
197 { /* there was something in the pipe */
198 /*fprintf(stderr,"Just read a %d from pipe\n",(int)k); *//*DEBUG */
199 /* Negative means terminate the FIRST sound in the buffer */
200 if (k < 0)
201 {
202 /*fprintf(stderr,"terminating sound\n"); *//*DEBUG */
203 terminate = 0;
204 }
205 else
206 {
207 if (sound_size[(int) k] == 0)
208 read_sound (k);
209 if (sound_size[(int) k] > 0 && playnum < 16)
210 {
211 position[playnum] = 0;
212 playing[playnum++] = k;
213 /*fprintf(stderr,"sound %d added to play queue\n",playnum-1); *//*DEBUG */
214 };
215 };
216 };
217
218 /* terminate a sound if necessary */
219 for (i = 0; i < playnum; i++)
220 {
221 if ((position[i] == sound_size[playing[i]]) || (terminate == i))
222 {
223 /*fprintf(stderr,"finished playing sound %d\n",i); *//*DEBUG */
224 /*fprintf(stderr,"is was at position %d\n",position[i]); *//*DEBUG */
225 bcopy (playing + i + 1, playing + i, (playnum - i) * sizeof (int));
226 bcopy (position + i + 1, position + i, (playnum - i) * sizeof (int));
227 playnum--;
228 i--;
229 };
230 };
231
232 if (playnum)
233 {
234 /* Mix each sound into the final buffer */
235 bzero (premix, sizeof (premix));
236 for (i = 0; i < playnum; i++)
237 {
238 sample = sound_buffer[playing[i]] + position[i] * fragsize;
239 for (j = 0; j < fragsize; j++)
240 {
241 premix[j] += *(sample + j);
242 };
243 position[i]++;
244 };
245 for (i = 0; i < fragsize; i++)
246 final[i] = (premix[i] > 255) ? 255 : (premix[i] < -256 ? 0 : (premix[i] >> 1) + 128);
247 }
248 else
249 {
250 /*
251 We have no sounds to play
252 Just fill the buffer with silence and maybe play it
253 */
254 memset (final, 128, sizeof (final));
255 };
256 write (dsp, final, fragsize);
257 /*
258 The sound server is in a tight loop, EXCEPT for this
259 write which blocks. Any optimizations in the above
260 code would really be helpful. Right now the server
261 takes up to 7% cpu on a 486DX/50.
262 */
263 }
264 }
265
266
267
268 void
269 main (argc, argv)
270 int argc;
271 char **argv;
272 {
273 int dsp;
274
275 fcntl (STDIN_FILENO, F_SETFL, O_NONBLOCK);
276 init (argc, argv);
277 dsp = setup_dsp (argv[2]);
278
279 if (dsp < 1)
280 do_nothing ();
281
282 do_everything (dsp);
283 }