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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 HP/UX 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.hp.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 <sys/time.h>
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40 #include <sys/audio.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 char *FILENAME[] = {
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46 "/explode.raw",
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47 "/cloak.raw",
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48 "/firetorp.raw",
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49 "/phaser.raw",
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50 "/plasma.raw",
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51 "/shield.raw",
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52 "/torphit.raw",
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53 "/explode_big.raw",
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54 "/paradise.raw",
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55 "/thermal.raw",
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56 "/redalert.raw"
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57 };
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58
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59 #define NUM_SOUNDS (sizeof(FILENAME)/sizeof(char*))
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60
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61 signed char *sound_buffer[NUM_SOUNDS];
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62 int sound_size[NUM_SOUNDS];
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63 #define fragsize (256)
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64
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65
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66 /* Terminate: Signal Handler */
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67 void quit ()
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68 {
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69 exit (0);
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70 }
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71
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72
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73
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74 void init (int argc, char **argv)
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75 {
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76 int i;
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77 char s[1024];
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78
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79 if (argc != 3)
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80 {
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81 printf ("This program is only executed by Paradise\n");
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82 exit (1);
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83 }
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84
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85 for (i=0; i < NUM_SOUNDS; i++)
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86 {
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87 s[0] = 0;
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88 strcat (s, argv[1]);
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89 if (s[(int)strlen(s) - 1] == '/') FILENAME[i]++;
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90 strcat (s, FILENAME[i]);
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91 FILENAME[i] = malloc ((int)strlen (s)+1);
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92 strcpy (FILENAME[i],s);
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93 sound_buffer[i]=NULL;
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94 sound_size[i]=0;
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95 }
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96
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97 signal(SIGTERM, quit); /* Setup Terminate Signal Handler */
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98 }
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99
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100
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101 /*
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102 Setup DSP: Opens /dev/audio
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103 Sets fragment size to 512
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104 Error checking
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105 */
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106 int setup_dsp (char *dspdev)
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107 {
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108 int dsp, frag, value;
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109 int mixer;
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110
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111 dsp = open(dspdev, O_RDWR);
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112 if (dsp < 1)
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113 {
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114 fprintf (stderr, "paradise.sndsrv: Couldn't open device %s\n",dspdev);
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115 return -1;
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116 }
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117
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118 if (-1 == ioctl(dsp, AUDIO_SET_DATA_FORMAT, AUDIO_FORMAT_LINEAR16BIT)) {
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119 fprintf(stderr,"paradise.sndsrv: parameter setting failed");
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120 return;
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121 }
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122
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123 if (-1 == ioctl(dsp, AUDIO_SET_CHANNELS, 1)) {
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124 fprintf(stderr,"paradise.sndsrv: parameter setting failed");
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125 return;
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126 }
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127
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128 if (-1 == ioctl(dsp, AUDIO_SET_SAMPLE_RATE, 16000)) {
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129 fprintf(stderr,"paradise.sndsrv: parameter setting failed");
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130 return -1;
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131 }
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132
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133 if (-1 == ioctl(dsp, AUDIO_SET_OUTPUT, AUDIO_OUT_INTERNAL)) {
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134 fprintf(stderr,"paradise.sndsrv: parameter setting failed");
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135 return -1;
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136 }
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137
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138
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139 return dsp;
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140 }
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141
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142 /*
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143 This just keeps the pipe from breaking...
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144 Eventually I'll look at the paradise signal handlers and
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145 just trap this.
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146 */
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147 int do_nothing(void)
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148 {
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149 while(1) sleep (5);
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150 }
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151
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152 int read_sound(int k)
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153 {
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154 int i,fd,size;
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155 unsigned char * b;
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156 short * d;
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157
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158 /* fprintf(stderr,"loading sound %d, %s\n",k,FILENAME[k]); */
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159
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160 fd = open(FILENAME[k], O_RDONLY);
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161 if(fd<=0)
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162 {
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163 fprintf (stderr, "paradise.sndsrv: The sound %s could not be opened\n", FILENAME[k]);
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164 sound_size[k]=-1;
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165 return(0);
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166 };
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167 size=lseek(fd,0,SEEK_END);
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168 sound_size[k]=((size)/fragsize)+1; /*size in fragments*/
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169 sound_buffer[k]=malloc(sound_size[k]*sizeof(short)*fragsize);
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170 if(sound_buffer[k]==NULL)
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171 {
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172 fprintf(stderr,"paradise.sndsrv: couldn't malloc memory for sound\n");
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173 sound_size[k]=-1;
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174 close(fd);
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175 return(0);
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176 };
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177 lseek(fd,0,SEEK_SET);
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178 read(fd,sound_buffer[k],size);
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179
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180 b = ((unsigned char *)sound_buffer[k])+sound_size[k]*fragsize;
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181 d = sound_buffer[k] + sound_size[k]*fragsize;
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182 /* fprintf(stderr,"size = %d\n",sound_size[k]*fragsize); */
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183 for (i=0; i < sound_size[k]*fragsize; i++) {
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184 *(--d) = (((short)*(--b))-128) << 8;
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185 }
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186
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187 close(fd);
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188 bzero(((char *)sound_buffer[k])+size, sound_size[k]*sizeof(short)*fragsize-size);
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189
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190 /* fprintf(stderr,"buba! sound has been loaded, %d bytes\n",size);*/ /*DEBUG*/
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191 return(1);
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192 }
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193
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194
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195 void do_everything (int dsp)
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196 {
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197 char k;
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198 int i, j ;
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199 int terminate = -1; /* Which Sound to Terminate */
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200 int playing[16]; /* Sound numbers that we are playing */
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201 int position[16]; /* Current position in each sound file */
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202 int playnum = 0; /* Number of sounds currently being played */
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203 short final[fragsize]; /* Final Mixing Buffer */
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204 short *sample;
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205
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206 for(;;) {
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207 terminate = -1;
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208 /* Try to open a new sound if we get an integer on the 'in' pipe */
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209 i=read(STDIN_FILENO,&k,sizeof(k));
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210 if(i==0) { /* EOF on pipe means parent has closed its end */
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211 /*fprintf(stderr,"paradise.sndsrv: shutting down\n"); */
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212 kill(getpid(), SIGTERM);
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213 };
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214 if(i!=-1) { /* there was something in the pipe */
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215 /*fprintf(stderr,"Just read a %d from pipe\n",(int)k);*/ /*DEBUG*/
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216 /* Negative means terminate the FIRST sound in the buffer */
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217 if(k<0) {
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218 fprintf(stderr,"terminating sound\n"); /*DEBUG*/
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219 terminate = 0;
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220 } else {
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221 if(sound_size[(int)k]==0) read_sound(k);
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222 if(sound_size[(int)k]>0 && playnum<16) {
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223 position[playnum]=0;
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224 playing[playnum++]=k;
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225 /* fprintf(stderr,"sound %d added to play queue\n",playnum-1);*/ /*DEBUG*/
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226 };
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227 };
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228 };
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229
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230 /* terminate a sound if necessary */
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231 for(i=0;i<playnum;i++)
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232 {
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233 if((position[i]==sound_size[playing[i]]) || (terminate==i))
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234 {
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235 /* fprintf(stderr,"finished playing sound %d\n",i); */ /*DEBUG*/
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236 /* fprintf(stderr,"is was at position %d\n",position[i]); */ /*DEBUG*/
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237 bcopy(playing+i+1,playing+i,(playnum-i)*sizeof(int));
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238 bcopy(position+i+1,position+i,(playnum-i)*sizeof(int));
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239 playnum--;i--;
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240 };
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241 };
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242
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243 memset(final, 0, sizeof(final));
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244 if(playnum) {
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245 /* Mix each sound into the final buffer */
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246 for(i=0;i<playnum;i++) {
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247 short * f = final;
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248 sample=sound_buffer[playing[i]]+position[i]*fragsize;
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249 for(j=0;j<fragsize;j++) {
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250 long s = *f;
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251 s += *sample++;
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252 if (s < -32768) {
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253 s = -32768;
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254 }
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255 if (s > 32767) {
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256 s = 32767;
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257 }
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258 *f++ = (short)s;
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259 };
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260 position[i]++;
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261 }
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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 };
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268 write (dsp, final, fragsize*sizeof(short));
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269 /*
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270 The sound server is in a tight loop, EXCEPT for this
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271 write which blocks. Any optimizations in the above
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272 code would really be helpful. Right now the server
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273 takes up to 7% cpu on a 486DX/50.
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274 */
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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 void main (argc, argv)
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281 int argc;
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282 char **argv;
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283 {
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284 int dsp;
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285
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286 fcntl(STDIN_FILENO,F_SETFL,O_NONBLOCK);
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287 init (argc, argv);
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288 dsp = setup_dsp (argv[2]);
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289
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290 if (dsp < 1) do_nothing();
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291
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292 do_everything (dsp);
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293 }
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