|
3
|
1 /*
|
|
|
2 * paradise.sndsrv.c - USS-Lite Compatible Sound - July 1996
|
|
|
3 * This server is Linux Specific.
|
|
|
4 * Sujal M. Patel (smpatel@umiacs.umd.edu)
|
|
|
5 *
|
|
|
6 *
|
|
|
7 * Copyright (c) 1994-1996, Sujal M. Patel
|
|
|
8 * All rights reserved.
|
|
|
9 *
|
|
|
10 * Redistribution and use in source and binary forms, with or without
|
|
|
11 * modification, are permitted provided that the following conditions
|
|
|
12 * are met:
|
|
|
13 * 1. Redistributions of source code must retain the above copyright
|
|
|
14 * notice, this list of conditions and the following disclaimer.
|
|
|
15 * 2. Redistributions in binary form must reproduce the above copyright
|
|
|
16 * notice, this list of conditions and the following disclaimer in the
|
|
|
17 * documentation and/or other materials provided with the distribution.
|
|
|
18 *
|
|
|
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
|
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
|
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
|
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
|
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
|
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
|
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
|
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
|
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
|
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
|
29 * SUCH DAMAGE.
|
|
|
30 *
|
|
|
31 * $Id: paradise.sndsrv.linux.c,v 1.1.1.1 1997/12/06 05:41:29 darius Exp $
|
|
|
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 <linux/soundcard.h>
|
|
|
40 #include <sys/time.h>
|
|
|
41 #include <signal.h>
|
|
|
42 #include <string.h>
|
|
|
43
|
|
|
44
|
|
|
45
|
|
|
46 char *FILENAME[] = {
|
|
|
47 "/explode.raw",
|
|
|
48 "/cloak.raw",
|
|
|
49 "/firetorp.raw",
|
|
|
50 "/phaser.raw",
|
|
|
51 "/plasma.raw",
|
|
|
52 "/shield.raw",
|
|
|
53 "/torphit.raw",
|
|
|
54 "/explode_big.raw",
|
|
|
55 "/paradise.raw",
|
|
|
56 "/thermal.raw",
|
|
|
57 "/redalert.raw"
|
|
|
58 };
|
|
|
59
|
|
|
60 #define NUM_SOUNDS (sizeof(FILENAME)/sizeof(char*))
|
|
|
61
|
|
|
62 signed char *sound_buffer[NUM_SOUNDS];
|
|
|
63 int sound_size[NUM_SOUNDS];
|
|
|
64 int fragsize;
|
|
|
65
|
|
|
66
|
|
|
67 /* Terminate: Signal Handler */
|
|
|
68 void quit ()
|
|
|
69 {
|
|
|
70 exit (0);
|
|
|
71 }
|
|
|
72
|
|
|
73
|
|
|
74
|
|
|
75 void init (int argc, char **argv)
|
|
|
76 {
|
|
|
77 int i;
|
|
|
78 char s[1024];
|
|
|
79
|
|
|
80 if (argc != 3)
|
|
|
81 {
|
|
|
82 printf ("This program is only executed by netrek.paradise\n");
|
|
|
83 exit (1);
|
|
|
84 }
|
|
|
85
|
|
|
86 for (i=0; i < NUM_SOUNDS; i++)
|
|
|
87 {
|
|
|
88 s[0] = 0;
|
|
|
89 strcat (s, argv[1]);
|
|
|
90 if (s[(int)strlen(s) - 1] == '/') FILENAME[i]++;
|
|
|
91 strcat (s, FILENAME[i]);
|
|
|
92 FILENAME[i] = malloc ((int)strlen (s));
|
|
|
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:
|
|
|
104 Sets fragment size on VoxWare
|
|
|
105 Sets speed to 8000hz
|
|
|
106 Should set mono mode
|
|
|
107 Error checking
|
|
|
108 */
|
|
|
109 int setup_dsp (char *dspdev,int *is_pcsp)
|
|
|
110 {
|
|
|
111 int dsp, frag, value;
|
|
|
112 int mixer;
|
|
|
113
|
|
|
114 dsp = open(dspdev, O_RDWR);
|
|
|
115 if (dsp < 1)
|
|
|
116 {
|
|
|
117 fprintf (stderr, "paradise.sndsrv: Couldn't open device %s\n",dspdev);
|
|
|
118 return -1;
|
|
|
119 }
|
|
|
120
|
|
|
121 *is_pcsp = 0;
|
|
|
122 fragsize = 0;
|
|
|
123
|
|
|
124 frag = 0x00020009; /* try 512 bytes, for 1/16 second frag size */
|
|
|
125 ioctl(dsp, SNDCTL_DSP_SETFRAGMENT, &frag);
|
|
|
126 value = 8010;
|
|
|
127 if (ioctl(dsp, SNDCTL_DSP_SPEED, &value))
|
|
|
128 {
|
|
|
129 fprintf (stderr, "paradise.sndsrv: Couldn't set DSP rate!\n");
|
|
|
130 };
|
|
|
131 value = 0;
|
|
|
132 ioctl(dsp, SNDCTL_DSP_STEREO, &value);
|
|
|
133 ioctl(dsp, SNDCTL_DSP_GETBLKSIZE, &fragsize);
|
|
|
134 /*fprintf(stderr,"paradise.sndsrv: fragment set to %d\n",fragsize);*/
|
|
|
135
|
|
|
136 if (!fragsize)
|
|
|
137 {
|
|
|
138 /* Don't Assume just because you can't set the fragment, use proper IOCTL */
|
|
|
139 fprintf (stderr, "paradise.sndsrv: Couldn't set Fragment Size.\nAssuming PC Speaker!\n");
|
|
|
140 fragsize = 128;
|
|
|
141 *is_pcsp = 1;
|
|
|
142 } else {
|
|
|
143 mixer = open("/dev/mixer",O_RDWR | O_NONBLOCK);
|
|
|
144 if(mixer==-1) {
|
|
|
145 fprintf(stderr,"paradise.sndsrv: Couldn't open mixer %s\n","/dev/mixer");
|
|
|
146 return(-1);
|
|
|
147 };
|
|
|
148 value=0x6464;
|
|
|
149 ioctl(mixer,SOUND_MIXER_WRITE_PCM,&value);
|
|
|
150 ioctl(mixer,SOUND_MIXER_WRITE_VOLUME,&value); /*what does this do?*/
|
|
|
151 close(mixer);
|
|
|
152 }
|
|
|
153
|
|
|
154 return dsp;
|
|
|
155 }
|
|
|
156
|
|
|
157 /*
|
|
|
158 This just keeps the pipe from breaking...
|
|
|
159 Eventually I'll look at the paradise signal handlers and
|
|
|
160 just trap this.
|
|
|
161 */
|
|
|
162 int do_nothing(void)
|
|
|
163 {
|
|
|
164 while(1) sleep (5);
|
|
|
165 }
|
|
|
166
|
|
|
167 int read_sound(int k)
|
|
|
168 {
|
|
|
169 int i,fd,size;
|
|
|
170
|
|
|
171 /*fprintf(stderr,"loading sound %d, %s\n",k,FILENAME[k]);*/
|
|
|
172
|
|
|
173 fd = open(FILENAME[k], O_RDONLY);
|
|
|
174 if(fd<=0)
|
|
|
175 {
|
|
|
176 fprintf (stderr, "paradise.sndsrv: The sound %s could not be opened\n", FILENAME[k]);
|
|
|
177 sound_size[k]=-1;
|
|
|
178 return(0);
|
|
|
179 };
|
|
|
180 size=lseek(fd,0,SEEK_END);
|
|
|
181 sound_size[k]=(size/fragsize)+1; /*size in fragments*/
|
|
|
182 sound_buffer[k]=malloc(sound_size[k]*fragsize);
|
|
|
183 if(sound_buffer[k]==NULL)
|
|
|
184 {
|
|
|
185 fprintf(stderr,"paradise.sndsrv: couldn't malloc memory for sound\n");
|
|
|
186 sound_size[k]=-1;
|
|
|
187 close(fd);
|
|
|
188 return(0);
|
|
|
189 };
|
|
|
190 lseek(fd,0,SEEK_SET);
|
|
|
191 read(fd,sound_buffer[k],size);
|
|
|
192 close(fd);
|
|
|
193 for(i=0;i<size;i++) sound_buffer[k][i]^=0x80;
|
|
|
194 memset(sound_buffer[k]+size,0,sound_size[k]*fragsize-size);
|
|
|
195
|
|
|
196 /*fprintf(stderr,"sound has been loaded, %d bytes\n",size);*/ /*DEBUG*/
|
|
|
197 return(1);
|
|
|
198 }
|
|
|
199
|
|
|
200
|
|
|
201 void do_everything (int dsp, int is_pcsp)
|
|
|
202 {
|
|
|
203 char k;
|
|
|
204 int i, j ;
|
|
|
205 int terminate = -1; /* Which Sound to Terminate */
|
|
|
206 int playing[16]; /* Sound numbers that we are playing */
|
|
|
207 int position[16]; /* Current position in each sound file */
|
|
|
208 int playnum = 0; /* Number of sounds currently being played */
|
|
|
209 unsigned char final[512]; /* Final Mixing Buffer */
|
|
|
210 int premix[512];
|
|
|
211 char *sample;
|
|
|
212
|
|
|
213 for(;;) {
|
|
|
214 terminate = -1;
|
|
|
215 /* Try to open a new sound if we get an integer on the 'in' pipe */
|
|
|
216 i=read(STDIN_FILENO,&k,sizeof(k));
|
|
|
217 if(i==0) { /* EOF on pipe means parent has closed its end */
|
|
|
218 /*fprintf(stderr,"paradise.sndsrv: shutting down\n"); */
|
|
|
219 kill(getpid(), SIGTERM);
|
|
|
220 };
|
|
|
221 if(i!=-1) { /* there was something in the pipe */
|
|
|
222 /*fprintf(stderr,"Just read a %d from pipe\n",(int)k);*/ /*DEBUG*/
|
|
|
223 /* Negative means terminate the FIRST sound in the buffer */
|
|
|
224 if(k<0) {
|
|
|
225 /*fprintf(stderr,"terminating sound\n");*/ /*DEBUG*/
|
|
|
226 terminate = 0;
|
|
|
227 } else {
|
|
|
228 if(sound_size[k]==0) read_sound(k);
|
|
|
229 if(sound_size[k]>0 && playnum<16) {
|
|
|
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--;i--;
|
|
|
247 };
|
|
|
248 };
|
|
|
249
|
|
|
250 if(playnum) {
|
|
|
251 /* Mix each sound into the final buffer */
|
|
|
252 memset(premix,0,sizeof(premix));
|
|
|
253 for(i=0;i<playnum;i++) {
|
|
|
254 sample=sound_buffer[playing[i]]+position[i]*fragsize;
|
|
|
255 for(j=0;j<fragsize;j++) {
|
|
|
256 premix[j]+=*(sample+j);
|
|
|
257 };
|
|
|
258 position[i]++;
|
|
|
259 };
|
|
|
260 for(i=0;i<fragsize;i++)
|
|
|
261 final[i]=(premix[i]>255)?255:(premix[i]<-256?0:(premix[i]>>1)+128);
|
|
|
262 } else {
|
|
|
263 /*
|
|
|
264 We have no sounds to play
|
|
|
265 Just fill the buffer with silence and maybe play it
|
|
|
266 */
|
|
|
267 memset(final,128,sizeof(final));
|
|
|
268 };
|
|
|
269 write (dsp, final, fragsize);
|
|
|
270 /*
|
|
|
271 The sound server is in a tight loop, EXCEPT for this
|
|
|
272 write which blocks. Any optimizations in the above
|
|
|
273 code would really be helpful. Right now the server
|
|
|
274 takes up to 7% cpu on a 486DX/50.
|
|
|
275 */
|
|
|
276 }
|
|
|
277 }
|
|
|
278
|
|
|
279
|
|
|
280
|
|
|
281 void main (argc, argv)
|
|
|
282 int argc;
|
|
|
283 char **argv;
|
|
|
284 {
|
|
|
285 int dsp, is_pcsp, ppid;
|
|
|
286 char filename[512];
|
|
|
287
|
|
|
288 fcntl(STDIN_FILENO,F_SETFL,O_NONBLOCK);
|
|
|
289 init (argc, argv);
|
|
|
290 dsp = setup_dsp (argv[2],&is_pcsp);
|
|
|
291
|
|
|
292 if (dsp < 1) do_nothing();
|
|
|
293
|
|
|
294 do_everything (dsp, is_pcsp);
|
|
|
295 }
|
