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annotate src/audio/openbsd/SDL_openbsdaudio.c @ 1011:4095d9ca23f2

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*** empty log message ***
author Sam Lantinga <slouken@libsdl.org>
date Mon, 13 Dec 2004 08:49:17 +0000
parents b8d311d90021
children 0276947bee66
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 Sam Lantinga
37
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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@libsdl.org
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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 OPENBSD_AUDIO_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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diff changeset
141 OBSD_WaitAudio(_THIS)
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142 {
94
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diff changeset
143 /* Check to see if the thread-parent process is still alive */
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diff changeset
144 { static int cnt = 0;
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diff changeset
145 /* Note that this only works with thread implementations
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diff changeset
146 that use a different process id for each thread.
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diff changeset
147 */
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diff changeset
148 if (parent && (((++cnt)%10) == 0)) { /* Check every 10 loops */
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diff changeset
149 if ( kill(parent, 0) < 0 ) {
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diff changeset
150 this->enabled = 0;
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151 }
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152 }
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153 }
37
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154
94
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diff changeset
155 #ifndef USE_BLOCKING_WRITES /* Not necessary when using blocking writes */
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diff changeset
156 /* See if we need to use timed audio synchronization */
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diff changeset
157 if ( frame_ticks ) {
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diff changeset
158 /* Use timer for general audio synchronization */
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diff changeset
159 Sint32 ticks;
37
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160
94
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diff changeset
161 ticks = ((Sint32)(next_frame - SDL_GetTicks()))-FUDGE_TICKS;
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diff changeset
162 if ( ticks > 0 ) {
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diff changeset
163 SDL_Delay(ticks);
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diff changeset
164 }
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diff changeset
165 } else {
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166 /* Use select() for audio synchronization */
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diff changeset
167 fd_set fdset;
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diff changeset
168 struct timeval timeout;
37
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169
94
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diff changeset
170 FD_ZERO(&fdset);
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diff changeset
171 FD_SET(audio_fd, &fdset);
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172 timeout.tv_sec = 10;
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diff changeset
173 timeout.tv_usec = 0;
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diff changeset
174 #ifdef DEBUG_AUDIO
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diff changeset
175 fprintf(stderr, "Waiting for audio to get ready\n");
37
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176 #endif
94
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diff changeset
177 if ( select(audio_fd+1, NULL, &fdset, NULL, &timeout) <= 0 ) {
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178 const char *message =
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179 "Audio timeout - buggy audio driver? (disabled)";
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180 /* In general we should never print to the screen,
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diff changeset
181 but in this case we have no other way of letting
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diff changeset
182 the user know what happened.
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diff changeset
183 */
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184 fprintf(stderr, "SDL: %s\n", message);
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185 this->enabled = 0;
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diff changeset
186 /* Don't try to close - may hang */
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diff changeset
187 audio_fd = -1;
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188 #ifdef DEBUG_AUDIO
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diff changeset
189 fprintf(stderr, "Done disabling audio\n");
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190 #endif
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diff changeset
191 }
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diff changeset
192 #ifdef DEBUG_AUDIO
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diff changeset
193 fprintf(stderr, "Ready!\n");
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diff changeset
194 #endif
37
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195 }
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196 #endif /* !USE_BLOCKING_WRITES */
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197 }
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198
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199 static void
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200 OBSD_PlayAudio(_THIS)
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201 {
94
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diff changeset
202 int written, p=0;
37
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203
94
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diff changeset
204 /* Write the audio data, checking for EAGAIN on broken audio drivers */
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diff changeset
205 do {
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diff changeset
206 written = write(audio_fd, &mixbuf[p], mixlen-p);
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diff changeset
207 if (written>0)
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diff changeset
208 p += written;
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diff changeset
209 if (written == -1 && errno != 0 && errno != EAGAIN && errno != EINTR)
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210 {
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diff changeset
211 /* Non recoverable error has occurred. It should be reported!!! */
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diff changeset
212 perror("audio");
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diff changeset
213 break;
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diff changeset
214 }
37
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215
94
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diff changeset
216 if ( p < written || ((written < 0) && ((errno == 0) || (errno == EAGAIN))) ) {
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diff changeset
217 SDL_Delay(1); /* Let a little CPU time go by */
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218 }
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diff changeset
219 } while ( p < written );
37
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220
94
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diff changeset
221 /* If timer synchronization is enabled, set the next write frame */
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diff changeset
222 if ( frame_ticks ) {
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diff changeset
223 next_frame += frame_ticks;
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diff changeset
224 }
37
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225
94
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diff changeset
226 /* If we couldn't write, assume fatal error for now */
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diff changeset
227 if ( written < 0 ) {
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diff changeset
228 this->enabled = 0;
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diff changeset
229 }
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230 #ifdef DEBUG_AUDIO
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diff changeset
231 fprintf(stderr, "Wrote %d bytes of audio data\n", written);
37
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232 #endif
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233 }
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234
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235 static Uint8
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236 *OBSD_GetAudioBuf(_THIS)
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diff changeset
237 {
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238 return(mixbuf);
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239 }
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240
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241 static void
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242 OBSD_CloseAudio(_THIS)
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243 {
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244 if(mixbuf != NULL) {
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245 SDL_FreeAudioMem(mixbuf);
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246 mixbuf = NULL;
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247 }
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248 if(audio_fd >= 0) {
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249 close(audio_fd);
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250 audio_fd = -1;
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251 }
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parents:
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252 }
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253
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254 #ifdef DEBUG_AUDIO
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parents:
diff changeset
255 void
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parents:
diff changeset
256 OBSD_Status(_THIS)
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diff changeset
257 {
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diff changeset
258 audio_info_t info;
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259
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diff changeset
260 if(ioctl(audio_fd, AUDIO_GETINFO, &info) < 0) {
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diff changeset
261 fprintf(stderr,"AUDIO_GETINFO failed.\n");
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262 return;
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diff changeset
263 }
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264
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265 fprintf(stderr,"
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266 [play/record info]
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267 buffer size : %d bytes
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268 sample rate : %i Hz
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269 channels : %i
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270 precision : %i-bit
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parents:
diff changeset
271 encoding : 0x%x
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parents:
diff changeset
272 seek : %i
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parents:
diff changeset
273 sample count : %i
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parents:
diff changeset
274 EOF count : %i
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parents:
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275 paused : %s
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parents:
diff changeset
276 error occured : %s
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
277 waiting : %s
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
278 active : %s
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
279 ",
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
280 info.play.buffer_size,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
281 info.play.sample_rate,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
282 info.play.channels,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
283 info.play.precision,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
284 info.play.encoding,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
285 info.play.seek,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
286 info.play.samples,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
287 info.play.eof,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
288 info.play.pause ? "yes" : "no",
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
289 info.play.error ? "yes" : "no",
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
290 info.play.waiting ? "yes" : "no",
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
291 info.play.active ? "yes": "no");
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
292
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
293 fprintf(stderr,"
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
294 [audio info]
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
295 monitor_gain : %i
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
296 hw block size : %d bytes
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
297 hi watermark : %i
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
298 lo watermark : %i
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
299 audio mode : %s
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
300 ",
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
301 info.monitor_gain,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
302 info.blocksize,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
303 info.hiwat, info.lowat,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
304 (info.mode == AUMODE_PLAY) ? "PLAY"
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
305 : (info.mode = AUMODE_RECORD) ? "RECORD"
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
306 : (info.mode == AUMODE_PLAY_ALL ? "PLAY_ALL"
543
522e5202014d *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
307 : "?"));
37
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
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 #endif /* DEBUG_AUDIO */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
310
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
311 static int
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
312 OBSD_OpenAudio(_THIS, SDL_AudioSpec *spec)
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
313 {
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
314 char audiodev[64];
131
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
315 Uint16 format;
37
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
316 audio_info_t info;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
317
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
318 AUDIO_INITINFO(&info);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
319
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
320 /* Calculate the final parameters for this audio specification */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
321 SDL_CalculateAudioSpec(spec);
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 #ifdef USE_TIMER_SYNC
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
324 frame_ticks = 0.0;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
325 #endif
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
326
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
327 /* Open the audio device */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
328 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
329 if(audio_fd < 0) {
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
330 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
331 return(-1);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
332 }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
333
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
334 /* Set to play mode */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
335 info.mode = AUMODE_PLAY;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
336 if(ioctl(audio_fd, AUDIO_SETINFO, &info) < 0) {
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
337 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
338 return(-1);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
339 }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
340
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
341 mixbuf = NULL;
131
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
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parents: 121
diff changeset
342 AUDIO_INITINFO(&info);
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parents: 121
diff changeset
343 for (format = SDL_FirstAudioFormat(spec->format);
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parents: 121
diff changeset
344 format; format = SDL_NextAudioFormat())
37
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
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parents:
diff changeset
345 {
131
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
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parents: 121
diff changeset
346 switch(format) {
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
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parents: 121
diff changeset
347 case AUDIO_U8:
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
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parents: 121
diff changeset
348 info.play.encoding = AUDIO_ENCODING_ULINEAR;
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
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parents: 121
diff changeset
349 info.play.precision = 8;
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
350 break;
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
351 case AUDIO_S8:
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
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parents: 121
diff changeset
352 info.play.encoding = AUDIO_ENCODING_SLINEAR;
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
353 info.play.precision = 8;
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
354 break;
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
355 case AUDIO_S16LSB:
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
356 info.play.encoding = AUDIO_ENCODING_SLINEAR_LE;
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
357 info.play.precision = 16;
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
358 break;
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
359 case AUDIO_S16MSB:
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
360 info.play.encoding = AUDIO_ENCODING_SLINEAR_BE;
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
361 info.play.precision = 16;
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
362 break;
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
363 case AUDIO_U16LSB:
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
364 info.play.encoding = AUDIO_ENCODING_ULINEAR_LE;
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
365 info.play.precision = 16;
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
366 break;
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
367 case AUDIO_U16MSB:
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
368 info.play.encoding = AUDIO_ENCODING_ULINEAR_BE;
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
369 info.play.precision = 16;
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
370 break;
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
371 default:
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
372 continue;
37
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
373 }
131
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
374 if (ioctl(audio_fd, AUDIO_SETINFO, &info) == 0)
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
375 break;
37
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
131
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
378 if(!format) {
37
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
379 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
380 return(-1);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
381 }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
382
131
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
383 spec->format = format;
37
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
384
131
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
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parents: 121
diff changeset
385 AUDIO_INITINFO(&info);
37
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
386 info.play.channels = spec->channels;
131
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
387 if (ioctl(audio_fd, AUDIO_SETINFO, &info) == -1)
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
388 spec->channels = 1;
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
389 AUDIO_INITINFO(&info);
37
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
390 info.play.sample_rate = spec->freq;
131
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
391 (void)ioctl(audio_fd, AUDIO_SETINFO, &info);
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
392 (void)ioctl(audio_fd, AUDIO_GETINFO, &info);
5d08b230932e Fixed audio format selection for OpenBSD (thanks Peter!)
Sam Lantinga <slouken@libsdl.org>
parents: 121
diff changeset
393 spec->freq = info.play.sample_rate;
37
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
394 /* Allocate mixing buffer */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
395 mixlen = spec->size;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
396 mixbuf = (Uint8*)SDL_AllocAudioMem(mixlen);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
397 if(mixbuf == NULL) {
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
398 return(-1);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
399 }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
400 memset(mixbuf, spec->silence, spec->size);
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 /* Get the parent process id (we're the parent of the audio thread) */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403 parent = getpid();
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
404
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
405 #ifdef DEBUG_AUDIO
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
406 OBSD_Status(this);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
407 #endif
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
408
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
409 /* We're ready to rock and roll. :-) */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
410 return(0);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
411 }