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annotate src/audio/openbsd/SDL_openbsdaudio.c @ 37:3ad7157c6cfa

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Added native OpenBSD audio driver (thanks vedge!)
author Sam Lantinga <slouken@lokigames.com>
date Sat, 26 May 2001 16:58:37 +0000
parents
children ae6e6b73333f
rev   line source
37
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@devolution.com
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21 */
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22
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23 /*
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24 * Driver for native OpenBSD audio(4).
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25 * vedge@vedge.com.ar.
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26 */
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27
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28 #include <stdlib.h>
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29 #include <stdio.h>
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30 #include <string.h>
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31 #include <errno.h>
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32 #include <unistd.h>
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33 #include <fcntl.h>
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34 #include <signal.h>
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35 #include <sys/time.h>
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36 #include <sys/ioctl.h>
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37 #include <sys/stat.h>
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38 #include <sys/types.h>
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39 #include <sys/audioio.h>
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40
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41 #include "SDL_audio.h"
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42 #include "SDL_error.h"
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43 #include "SDL_audiomem.h"
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44 #include "SDL_audio_c.h"
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45 #include "SDL_timer.h"
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46 #include "SDL_audiodev_c.h"
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47 #include "SDL_openbsdaudio.h"
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48
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49 /* The tag name used by OpenBSD audio */
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50 #define OBSD_DRIVER_NAME "openbsd"
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51
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52 /* Open the audio device for playback, and don't block if busy */
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53 /* #define USE_BLOCKING_WRITES */
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54
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55 /* Use timer for synchronization */
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56 /* #define USE_TIMER_SYNC */
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57
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58 /* #define DEBUG_AUDIO */
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59 /* #define DEBUG_AUDIO_STREAM */
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60
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61 #ifdef USE_BLOCKING_WRITES
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62 #define OPEN_FLAGS O_WRONLY
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63 #else
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64 #define OPEN_FLAGS (O_WRONLY|O_NONBLOCK)
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65 #endif
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66
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67 /* Audio driver functions */
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68 static void OBSD_WaitAudio(_THIS);
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69 static int OBSD_OpenAudio(_THIS, SDL_AudioSpec *spec);
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70 static void OBSD_PlayAudio(_THIS);
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71 static Uint8 *OBSD_GetAudioBuf(_THIS);
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72 static void OBSD_CloseAudio(_THIS);
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73
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74 #ifdef DEBUG_AUDIO
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75 static void OBSD_Status(_THIS);
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76 #endif
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77
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78 /* Audio driver bootstrap functions */
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79
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80 static int
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81 Audio_Available(void)
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82 {
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83 int fd;
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84 int available;
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85
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86 available = 0;
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87 fd = SDL_OpenAudioPath(NULL, 0, OPEN_FLAGS, 0);
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88 if(fd >= 0) {
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89 available = 1;
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90 close(fd);
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91 }
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92 return(available);
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93 }
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94
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95 static void
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96 Audio_DeleteDevice(SDL_AudioDevice *device)
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97 {
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98 free(device->hidden);
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99 free(device);
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100 }
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101
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102 static SDL_AudioDevice
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103 *Audio_CreateDevice(int devindex)
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104 {
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105 SDL_AudioDevice *this;
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106
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107 /* Initialize all variables that we clean on shutdown */
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108 this = (SDL_AudioDevice*)malloc(sizeof(SDL_AudioDevice));
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109 if(this) {
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110 memset(this, 0, (sizeof *this));
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111 this->hidden =
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112 (struct SDL_PrivateAudioData*)malloc((sizeof *this->hidden));
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113 }
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114 if((this == NULL) || (this->hidden == NULL)) {
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115 SDL_OutOfMemory();
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116 if(this) free(this);
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117 return(0);
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118 }
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119 memset(this->hidden, 0, (sizeof *this->hidden));
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120 audio_fd = -1;
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121
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122 /* Set the function pointers */
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123 this->OpenAudio = OBSD_OpenAudio;
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124 this->WaitAudio = OBSD_WaitAudio;
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125 this->PlayAudio = OBSD_PlayAudio;
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126 this->GetAudioBuf = OBSD_GetAudioBuf;
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127 this->CloseAudio = OBSD_CloseAudio;
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128
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129 this->free = Audio_DeleteDevice;
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130
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131 return this;
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132 }
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133
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134 AudioBootStrap OBSD_bootstrap = {
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135 OBSD_DRIVER_NAME, "Native OpenBSD audio",
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136 Audio_Available, Audio_CreateDevice
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137 };
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138
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139 /* This function waits until it is possible to write a full sound buffer */
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140 static void
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141 OBSD_WaitAudio(_THIS)
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142 {
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143 #ifndef USE_BLOCKING_WRITES
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144 fd_set fdset;
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145
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146 /* Check to see if the thread-parent process is still alive */
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147 {
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148 static int cnt = 0;
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149 /* Note that this only works with thread implementations
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150 that use a different process id for each thread. */
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151 if(parent && (((++cnt)%10) == 0)) { /* Check every 10 loops */
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152 if(kill(parent, 0) < 0)
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153 this->enabled = 0;
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154 }
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155 }
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156
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157 #ifdef USE_TIMER_SYNC
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158 /* See if we need to use timed audio synchronization */
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159 if(frame_ticks)
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160 {
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161 /* Use timer for general audio synchronization */
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162 Sint32 ticks;
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163
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164 ticks = ((Sint32)(next_frame - SDL_GetTicks())) - FUDGE_TICKS;
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165 if(ticks > 0)
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166 SDL_Delay(ticks);
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167 }
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168 else
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169 #endif /* USE_TIMER_SYNC */
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170 {
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171 /* Use select() for audio synchronization */
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172 struct timeval timeout;
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173 FD_ZERO(&fdset);
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174 FD_SET(audio_fd, &fdset);
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175 timeout.tv_sec = 10;
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176 timeout.tv_usec = 0;
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177
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178 #if defined(DEBUG_AUDIO_STREAM) && defined(DEBUG_AUDIO_STREAM)
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179 OBSD_Status(this);
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180 #endif
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181 if(select(audio_fd+1, NULL, &fdset, NULL, &timeout) <= 0)
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182 {
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183 const char *message =
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184 "Audio timeout - buggy audio driver? (disabled)";
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185 fprintf(stderr, "SDL: %s\n", message);
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186 this->enabled = 0;
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187 audio_fd = -1;
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188 }
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189 }
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190 #endif /* !USE_BLOCKING_WRITES */
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191
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192 }
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193
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194 static void
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195 OBSD_PlayAudio(_THIS)
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196 {
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197 int written;
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198
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199 /* Write the audio data, checking for EAGAIN on broken audio drivers */
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200 do
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201 {
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202 written = write(audio_fd, mixbuf, mixlen);
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203 if((written < 0) && ((errno == 0) || (errno == EAGAIN)))
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204 SDL_Delay(1);
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205 }
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206 while((written < 0) &&
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207 ((errno == 0) || (errno == EAGAIN) || (errno == EINTR)));
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208
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209 #ifdef USE_TIMER_SYNC
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210 if(frame_ticks)
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211 next_frame += frame_ticks;
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212 #endif
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213
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214 /* If we couldn't write, assume fatal error for now */
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215 if(written < 0)
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216 this->enabled = 0;
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217
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218 #ifdef DEBUG_AUDIO_STREAM
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219 fprintf(stderr, "Wrote %d bytes of audio data\n", written);
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220 #endif
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221 }
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222
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223 static Uint8
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224 *OBSD_GetAudioBuf(_THIS)
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225 {
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226 return(mixbuf);
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227 }
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228
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229 static void
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230 OBSD_CloseAudio(_THIS)
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231 {
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232 if(mixbuf != NULL) {
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233 SDL_FreeAudioMem(mixbuf);
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234 mixbuf = NULL;
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235 }
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236 if(audio_fd >= 0) {
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237 close(audio_fd);
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238 audio_fd = -1;
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239 }
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240 }
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241
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242 #ifdef DEBUG_AUDIO
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243 void
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244 OBSD_Status(_THIS)
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245 {
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246 audio_info_t info;
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247
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248 if(ioctl(audio_fd, AUDIO_GETINFO, &info) < 0) {
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249 fprintf(stderr,"AUDIO_GETINFO failed.\n");
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250 return;
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251 }
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252
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253 fprintf(stderr,"
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254 [play/record info]
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255 buffer size : %d bytes
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256 sample rate : %i Hz
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257 channels : %i
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258 precision : %i-bit
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259 encoding : 0x%x
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260 seek : %i
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261 sample count : %i
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262 EOF count : %i
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263 paused : %s
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264 error occured : %s
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265 waiting : %s
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266 active : %s
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diff changeset
267 ",
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268 info.play.buffer_size,
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269 info.play.sample_rate,
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270 info.play.channels,
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271 info.play.precision,
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272 info.play.encoding,
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273 info.play.seek,
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274 info.play.samples,
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275 info.play.eof,
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276 info.play.pause ? "yes" : "no",
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277 info.play.error ? "yes" : "no",
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diff changeset
278 info.play.waiting ? "yes" : "no",
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diff changeset
279 info.play.active ? "yes": "no");
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280
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281 fprintf(stderr,"
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parents:
diff changeset
282 [audio info]
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
283 monitor_gain : %i
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
284 hw block size : %d bytes
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
285 hi watermark : %i
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
286 lo watermark : %i
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
287 audio mode : %s
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
288 ",
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
289 info.monitor_gain,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
290 info.blocksize,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
291 info.hiwat, info.lowat,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
292 (info.mode == AUMODE_PLAY) ? "PLAY"
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
293 : (info.mode = AUMODE_RECORD) ? "RECORD"
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parents:
diff changeset
294 : (info.mode == AUMODE_PLAY_ALL ? "PLAY_ALL"
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
295 : "???"));
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
296 }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
297 #endif /* DEBUG_AUDIO */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
298
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
299 static int
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
300 OBSD_OpenAudio(_THIS, SDL_AudioSpec *spec)
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
301 {
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
302 char audiodev[64];
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
303 Uint16 setenc;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
304 audio_encoding_t enc;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
305 audio_info_t info;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
306
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
307 AUDIO_INITINFO(&info);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
308
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
309 /* Calculate the final parameters for this audio specification */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
310 SDL_CalculateAudioSpec(spec);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
311
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
312 #ifdef USE_TIMER_SYNC
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
313 frame_ticks = 0.0;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
314 #endif
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
315
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
316 /* Open the audio device */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
317 audio_fd = SDL_OpenAudioPath(audiodev, sizeof(audiodev), OPEN_FLAGS, 0);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
318 if(audio_fd < 0) {
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
319 SDL_SetError("Couldn't open %s: %s", audiodev, strerror(errno));
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
320 return(-1);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
321 }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
322
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
323 /* Set to play mode */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
324 info.mode = AUMODE_PLAY;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
325 if(ioctl(audio_fd, AUDIO_SETINFO, &info) < 0) {
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
326 SDL_SetError("Couldn't put device into play mode");
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
327 return(-1);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
328 }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
329
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
330 mixbuf = NULL;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
331 setenc = 0;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
332
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
333 for(enc.index = 0; (ioctl(audio_fd, AUDIO_GETENC, &enc)>=0)
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
334 && (enc.encoding != setenc); enc.index++)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
335 {
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
336 switch(spec->format)
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
337 {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
338 case AUDIO_U8: /* 8-bit unsigned linear */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
339 setenc = AUDIO_ENCODING_PCM8;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
340 break;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
341 case AUDIO_S8: /* 8-bit signed linear */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
342 setenc = AUDIO_ENCODING_SLINEAR;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
343 break;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
344 case AUDIO_U16LSB: /* 16-bit unsigned linear, LSB */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
345 setenc = AUDIO_ENCODING_ULINEAR_LE;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
346 break;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
347 case AUDIO_U16MSB: /* 16-bit unsigned linear, MSB */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
348 setenc = AUDIO_ENCODING_ULINEAR_BE;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
349 break;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
350 case AUDIO_S16LSB: /* 16-bit signed linear, LSB */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
351 setenc = AUDIO_ENCODING_SLINEAR_LE;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
352 break;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
353 case AUDIO_S16MSB: /* 16-bit signed linear, MSB */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
354 setenc = AUDIO_ENCODING_SLINEAR_BE;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
355 break;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
356 }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
357 #ifdef DEBUG_AUDIO
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
358 fprintf(stderr,"encoding #%i: \"%s\" %i-bit (0x%x) flags=%i...\n",
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
359 enc.index, enc.name, enc.precision, enc.encoding, enc.flags);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
360 #endif
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
361 }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
362
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
363 if(!setenc) {
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
364 SDL_SetError("No supported encoding for 0x%x", spec->format);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
365 return(-1);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
366 }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
367
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
368 /* Set audio encoding */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
369 info.play.encoding = enc.encoding;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
370 info.play.precision = enc.precision;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
371 if((ioctl(audio_fd, AUDIO_SETINFO, &info) < 0)) {
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
372 SDL_SetError("Couldn't set encoding to 0x%x %i-bit",
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
373 enc.encoding, enc.precision);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
374 return(-1);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
375 }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
376
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
377 /* Set audio channels */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
378 info.play.channels = spec->channels;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
379 if(ioctl(audio_fd, AUDIO_SETINFO, &info) < 0) {
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
380 info.play.channels = (spec->channels > 1);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
381 ioctl(audio_fd, AUDIO_SETINFO, &info);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
382 }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
383
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
384 /* Set the sample rate */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
385 info.play.sample_rate = spec->freq;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
386 if(ioctl(audio_fd, AUDIO_SETINFO, &info) < 0) {
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
387 SDL_SetError("Couldn't set sample rate to %i Hz", spec->freq);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
388 return(-1);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
389 }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
390
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
391 /* Allocate mixing buffer */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
392 mixlen = spec->size;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
393 mixbuf = (Uint8*)SDL_AllocAudioMem(mixlen);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
394 if(mixbuf == NULL) {
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
395 return(-1);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
396 }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
397 memset(mixbuf, spec->silence, spec->size);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
398
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
399 /* Get the parent process id (we're the parent of the audio thread) */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
400 parent = getpid();
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
401
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
402 #ifdef DEBUG_AUDIO
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403 OBSD_Status(this);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
404 #endif
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
405
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
406 /* We're ready to rock and roll. :-) */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
407 return(0);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
408 }