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3
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1 /*
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2 * paradise.sndsrv.c - USS-Lite Compatible Sound - July 1996
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3 * This server is FreeBSD Specific.
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4 * Sujal M. Patel (smpatel@umiacs.umd.edu)
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5 *
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6 *
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7 * Copyright (c) 1994-1996, Sujal M. Patel
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8 * All rights reserved.
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9 *
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10 * Redistribution and use in source and binary forms, with or without
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11 * modification, are permitted provided that the following conditions
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12 * are met:
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13 * 1. Redistributions of source code must retain the above copyright
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14 * notice, this list of conditions and the following disclaimer.
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15 * 2. Redistributions in binary form must reproduce the above copyright
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16 * notice, this list of conditions and the following disclaimer in the
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17 * documentation and/or other materials provided with the distribution.
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18 *
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19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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29 * SUCH DAMAGE.
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30 *
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31 * $Id: paradise.sndsrv.freebsd.c,v 1.1.1.1 1997/12/06 05:41:29 darius Exp $
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32 */
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33
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34 #include <stdio.h>
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35 #include <stdlib.h>
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36 #include <unistd.h>
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37 #include <fcntl.h>
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38 #include <sys/ioctl.h>
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39 #include <machine/soundcard.h>
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40 #include <sys/time.h>
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41 #include <signal.h>
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42 #include <string.h>
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43
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44
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45
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46 char *FILENAME[] = {
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47 "/explode.raw",
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48 "/cloak.raw",
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49 "/firetorp.raw",
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50 "/phaser.raw",
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51 "/plasma.raw",
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52 "/shield.raw",
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53 "/torphit.raw",
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54 "/explode_big.raw",
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55 "/paradise.raw",
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56 "/thermal.raw",
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57 "/redalert.raw"
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58 };
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59
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60 #define NUM_SOUNDS (sizeof(FILENAME)/sizeof(char*))
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61
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62 signed char *sound_buffer[NUM_SOUNDS];
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63 int sound_size[NUM_SOUNDS];
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64 int fragsize;
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65
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66
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67 /* Terminate: Signal Handler */
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68 void quit ()
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69 {
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70 exit (0);
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71 }
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72
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73
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74
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75 void init (int argc, char **argv)
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76 {
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77 int i;
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78 char s[1024];
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79
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80 if (argc != 3)
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81 {
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82 printf ("This program is only executed by netrek.paradise\n");
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83 exit (1);
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84 }
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85
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86 for (i=0; i < NUM_SOUNDS; i++)
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87 {
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88 s[0] = 0;
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89 strcat (s, argv[1]);
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90 if (s[(int)strlen(s) - 1] == '/') FILENAME[i]++;
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91 strcat (s, FILENAME[i]);
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92 FILENAME[i] = malloc ((int)strlen (s));
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93 strcpy (FILENAME[i],s);
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94 sound_buffer[i]=NULL;
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95 sound_size[i]=0;
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96 }
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97
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98 signal(SIGTERM, quit); /* Setup Terminate Signal Handler */
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99 }
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100
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101
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102 /*
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103 Setup DSP: Opens /dev/dsp or /dev/pcdsp
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104 Sets fragment size on VoxWare
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105 Sets speed to 8000hz
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106 Should set mono mode
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107 Error checking
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108 */
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109 int setup_dsp (char *dspdev,int *is_pcsp)
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110 {
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111 int dsp, frag, value;
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112 int mixer;
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113
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114 dsp = open(dspdev, O_RDWR);
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115 if (dsp < 1)
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116 {
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117 fprintf (stderr, "paradise.sndsrv: Couldn't open device %s\n",dspdev);
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118 return -1;
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119 }
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120
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121 *is_pcsp = 0;
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122 fragsize = 0;
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123
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124 frag = 0x00020009; /* try 512 bytes, for 1/16 second frag size */
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125 ioctl(dsp, SNDCTL_DSP_SETFRAGMENT, &frag);
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126 value = 8010;
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127 if (ioctl(dsp, SNDCTL_DSP_SPEED, &value))
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128 {
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129 fprintf (stderr, "paradise.sndsrv: Couldn't set DSP rate!\n");
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130 };
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131 value = 0;
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132 ioctl(dsp, SNDCTL_DSP_STEREO, &value);
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133 ioctl(dsp, SNDCTL_DSP_GETBLKSIZE, &fragsize);
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134 /*fprintf(stderr,"paradise.sndsrv: fragment set to %d\n",fragsize);*/
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135
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136 if (!fragsize)
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137 {
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138 /* Don't Assume just because you can't set the fragment, use proper IOCTL */
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139 fprintf (stderr, "paradise.sndsrv: Couldn't set Fragment Size.\nAssuming PC Speaker!\n");
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140 fragsize = 128;
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141 *is_pcsp = 1;
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142 } else {
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143 mixer = open("/dev/mixer",O_RDWR | O_NONBLOCK);
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144 if(mixer==-1) {
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145 fprintf(stderr,"paradise.sndsrv: Couldn't open mixer %s\n","/dev/mixer");
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146 return(-1);
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147 };
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148 value=0x6464;
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149 ioctl(mixer,SOUND_MIXER_WRITE_PCM,&value);
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150 ioctl(mixer,SOUND_MIXER_WRITE_VOLUME,&value); /*what does this do?*/
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151 close(mixer);
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152 }
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153
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154 return dsp;
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155 }
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156
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157 /*
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158 This just keeps the pipe from breaking...
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159 Eventually I'll look at the paradise signal handlers and
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160 just trap this.
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161 */
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162 int do_nothing(void)
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163 {
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164 while(1) sleep (5);
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165 }
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166
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167 int read_sound(int k)
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168 {
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169 int i,fd,size;
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170
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171 /*fprintf(stderr,"loading sound %d, %s\n",k,FILENAME[k]);*/
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172
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173 fd = open(FILENAME[k], O_RDONLY);
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174 if(fd<=0)
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175 {
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176 fprintf (stderr, "paradise.sndsrv: The sound %s could not be opened\n", FILENAME[k]);
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177 sound_size[k]=-1;
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178 return(0);
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179 };
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180 size=lseek(fd,0,SEEK_END);
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181 sound_size[k]=(size/fragsize)+1; /*size in fragments*/
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182 sound_buffer[k]=malloc(sound_size[k]*fragsize);
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183 if(sound_buffer[k]==NULL)
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184 {
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185 fprintf(stderr,"paradise.sndsrv: couldn't malloc memory for sound\n");
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186 sound_size[k]=-1;
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187 close(fd);
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188 return(0);
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189 };
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190 lseek(fd,0,SEEK_SET);
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191 read(fd,sound_buffer[k],size);
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192 close(fd);
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193 for(i=0;i<size;i++) sound_buffer[k][i]^=0x80;
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194 memset(sound_buffer[k]+size,0,sound_size[k]*fragsize-size);
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195
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196 /*fprintf(stderr,"sound has been loaded, %d bytes\n",size);*/ /*DEBUG*/
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197 return(1);
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198 }
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199
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200
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201 void do_everything (int dsp, int is_pcsp)
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202 {
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203 char k;
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204 int i, j ;
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205 int terminate = -1; /* Which Sound to Terminate */
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206 int playing[16]; /* Sound numbers that we are playing */
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207 int position[16]; /* Current position in each sound file */
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208 int playnum = 0; /* Number of sounds currently being played */
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209 unsigned char final[512]; /* Final Mixing Buffer */
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210 int premix[512];
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211 char *sample;
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212
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213 for(;;) {
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214 terminate = -1;
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215 /* Try to open a new sound if we get an integer on the 'in' pipe */
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216 i=read(STDIN_FILENO,&k,sizeof(k));
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217 if(i==0) { /* EOF on pipe means parent has closed its end */
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218 /*fprintf(stderr,"paradise.sndsrv: shutting down\n"); */
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219 kill(getpid(), SIGTERM);
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220 };
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221 if(i!=-1) { /* there was something in the pipe */
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222 /*fprintf(stderr,"Just read a %d from pipe\n",(int)k);*/ /*DEBUG*/
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223 /* Negative means terminate the FIRST sound in the buffer */
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224 if(k<0) {
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225 /*fprintf(stderr,"terminating sound\n");*/ /*DEBUG*/
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226 terminate = 0;
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227 } else {
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228 if(sound_size[k]==0) read_sound(k);
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229 if(sound_size[k]>0 && playnum<16) {
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230 position[playnum]=0;
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231 playing[playnum++]=k;
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232 /*fprintf(stderr,"sound %d added to play queue\n",playnum-1);*/ /*DEBUG*/
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233 };
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234 };
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235 };
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236
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237 /* terminate a sound if necessary */
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238 for(i=0;i<playnum;i++)
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239 {
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240 if((position[i]==sound_size[playing[i]]) || (terminate==i))
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241 {
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242 /*fprintf(stderr,"finished playing sound %d\n",i);*/ /*DEBUG*/
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243 /*fprintf(stderr,"is was at position %d\n",position[i]);*/ /*DEBUG*/
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244 memmove(playing+i,playing+i+1,(playnum-i)*sizeof(int));
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245 memmove(position+i,position+i+1,(playnum-i)*sizeof(int));
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246 playnum--;i--;
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247 };
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248 };
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249
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250 if(playnum) {
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251 /* Mix each sound into the final buffer */
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252 memset(premix,0,sizeof(premix));
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253 for(i=0;i<playnum;i++) {
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254 sample=sound_buffer[playing[i]]+position[i]*fragsize;
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255 for(j=0;j<fragsize;j++) {
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256 premix[j]+=*(sample+j);
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257 };
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258 position[i]++;
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259 };
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260 for(i=0;i<fragsize;i++)
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261 final[i]=(premix[i]>255)?255:(premix[i]<-256?0:(premix[i]>>1)+128);
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262 } else {
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263 /*
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264 We have no sounds to play
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265 Just fill the buffer with silence and maybe play it
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266 */
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267 memset(final,128,sizeof(final));
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268 };
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269 write (dsp, final, fragsize);
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270 /*
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271 The sound server is in a tight loop, EXCEPT for this
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272 write which blocks. Any optimizations in the above
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273 code would really be helpful. Right now the server
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274 takes up to 7% cpu on a 486DX/50.
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275 */
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276 }
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277 }
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278
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279
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280
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281 void main (argc, argv)
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282 int argc;
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283 char **argv;
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284 {
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285 int dsp, is_pcsp, ppid;
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286 char filename[512];
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287
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288 fcntl(STDIN_FILENO,F_SETFL,O_NONBLOCK);
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289 init (argc, argv);
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290 dsp = setup_dsp (argv[2],&is_pcsp);
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291
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292 if (dsp < 1) do_nothing();
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293
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294 do_everything (dsp, is_pcsp);
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295 }
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