annotate src/audio/SDL_audio.c @ 148:8758b8d42cd9

Audio subsystem no longer assumes sun audio API on UNIX systems
author Sam Lantinga <slouken@libsdl.org>
date Thu, 09 Aug 2001 13:09:47 +0000
parents 43febd46d49d
children e8157fcb3114
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, 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 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /* Allow access to a raw mixing buffer */
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29 #include <stdlib.h>
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30 #include <stdio.h>
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31 #include <string.h>
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32
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33 #include "SDL.h"
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34 #include "SDL_audio.h"
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35 #include "SDL_timer.h"
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36 #include "SDL_error.h"
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37 #include "SDL_audio_c.h"
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38 #include "SDL_audiomem.h"
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39 #include "SDL_sysaudio.h"
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40
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41 /* Available audio drivers */
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42 static AudioBootStrap *bootstrap[] = {
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43 #ifdef OPENBSD_AUDIO_SUPPORT
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44 &OPENBSD_AUDIO_bootstrap,
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45 #endif
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46 #ifdef OSS_SUPPORT
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47 &DSP_bootstrap,
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48 &DMA_bootstrap,
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49 #endif
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50 #ifdef ALSA_SUPPORT
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51 &ALSA_bootstrap,
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52 #endif
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53 #ifdef SUNAUDIO_SUPPORT
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54 &SUNAUDIO_bootstrap,
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55 #endif
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56 #ifdef DMEDIA_SUPPORT
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57 &DMEDIA_bootstrap,
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58 #endif
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59 #ifdef ARTSC_SUPPORT
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60 &ARTSC_bootstrap,
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61 #endif
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62 #ifdef ESD_SUPPORT
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63 &ESD_bootstrap,
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64 #endif
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65 #ifdef NAS_SUPPORT
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66 &NAS_bootstrap,
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67 #endif
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68 #ifdef ENABLE_DIRECTX
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69 &DSOUND_bootstrap,
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70 #endif
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71 #ifdef ENABLE_WINDIB
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72 &WAVEOUT_bootstrap,
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73 #endif
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74 #ifdef __BEOS__
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75 &BAUDIO_bootstrap,
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76 #endif
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77 #if defined(macintosh) || TARGET_API_MAC_CARBON
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78 &SNDMGR_bootstrap,
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79 #endif
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80 #ifdef _AIX
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81 &Paud_bootstrap,
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82 #endif
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83 #ifdef ENABLE_AHI
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84 &AHI_bootstrap,
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85 #endif
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86 #ifdef DISKAUD_SUPPORT
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87 &DISKAUD_bootstrap,
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88 #endif
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89 NULL
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90 };
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91 SDL_AudioDevice *current_audio = NULL;
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92
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93 /* Various local functions */
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94 int SDL_AudioInit(const char *driver_name);
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95 void SDL_AudioQuit(void);
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96
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97 #ifdef ENABLE_AHI
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98 static int audio_configured = 0;
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99 #endif
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100
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101 /* The general mixing thread function */
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102 int SDL_RunAudio(void *audiop)
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103 {
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104 SDL_AudioDevice *audio = (SDL_AudioDevice *)audiop;
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105 Uint8 *stream;
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106 int stream_len;
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107 void *udata;
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108 void (*fill)(void *userdata,Uint8 *stream, int len);
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109 int silence;
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110 #ifdef ENABLE_AHI
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111 int started = 0;
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112
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113 /* AmigaOS NEEDS that the audio driver is opened in the thread that uses it! */
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114
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115 D(bug("Task audio started audio struct:<%lx>...\n",audiop));
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116
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117 D(bug("Before Openaudio..."));
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118 if(audio->OpenAudio(audio, &audio->spec)==-1)
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119 {
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120 D(bug("Open audio failed...\n"));
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121 return(-1);
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122 }
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123 D(bug("OpenAudio...OK\n"));
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124 #endif
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125
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126 /* Perform any thread setup */
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127 if ( audio->ThreadInit ) {
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128 audio->ThreadInit(audio);
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129 }
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130 audio->threadid = SDL_ThreadID();
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131
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132 /* Set up the mixing function */
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133 fill = audio->spec.callback;
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134 udata = audio->spec.userdata;
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135
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136 #ifdef ENABLE_AHI
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137 audio_configured = 1;
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138
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139 D(bug("Audio configured... Checking for conversion\n"));
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140 SDL_mutexP(audio->mixer_lock);
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141 D(bug("Semaphore obtained...\n"));
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142 #endif
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143
0
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144 if ( audio->convert.needed ) {
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145 if ( audio->convert.src_format == AUDIO_U8 ) {
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146 silence = 0x80;
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147 } else {
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148 silence = 0;
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149 }
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150 stream_len = audio->convert.len;
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151 } else {
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152 silence = audio->spec.silence;
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153 stream_len = audio->spec.size;
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154 }
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155 stream = audio->fake_stream;
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156
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157 #ifdef ENABLE_AHI
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158 SDL_mutexV(audio->mixer_lock);
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159 D(bug("Entering audio loop...\n"));
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160 #endif
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161
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162
0
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163 /* Loop, filling the audio buffers */
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164 while ( audio->enabled ) {
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165
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166 /* Wait for new current buffer to finish playing */
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167 if ( stream == audio->fake_stream ) {
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168 SDL_Delay((audio->spec.samples*1000)/audio->spec.freq);
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169 } else {
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170 #ifdef ENABLE_AHI
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171 if ( started > 1 )
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172 #endif
0
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173 audio->WaitAudio(audio);
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174 }
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175
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176 /* Fill the current buffer with sound */
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177 if ( audio->convert.needed ) {
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178 if ( audio->convert.buf ) {
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179 stream = audio->convert.buf;
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180 } else {
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181 continue;
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182 }
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183 } else {
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184 stream = audio->GetAudioBuf(audio);
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185 if ( stream == NULL ) {
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186 stream = audio->fake_stream;
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187 }
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188 }
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189 memset(stream, silence, stream_len);
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190
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191 if ( ! audio->paused ) {
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192 SDL_mutexP(audio->mixer_lock);
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193 (*fill)(udata, stream, stream_len);
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194 SDL_mutexV(audio->mixer_lock);
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195 }
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196
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197 /* Convert the audio if necessary */
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198 if ( audio->convert.needed ) {
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199 SDL_ConvertAudio(&audio->convert);
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200 stream = audio->GetAudioBuf(audio);
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201 if ( stream == NULL ) {
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202 stream = audio->fake_stream;
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203 }
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204 memcpy(stream, audio->convert.buf,
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205 audio->convert.len_cvt);
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206 }
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207
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208 /* Ready current buffer for play and change current buffer */
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209 if ( stream != audio->fake_stream ) {
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210 audio->PlayAudio(audio);
21
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211 #ifdef ENABLE_AHI
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212 /* AmigaOS don't have to wait the first time audio is played! */
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213 started++;
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214 #endif
0
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215 }
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216 }
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217 /* Wait for the audio to drain.. */
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218 if ( audio->WaitDone ) {
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219 audio->WaitDone(audio);
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220 }
21
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221
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222 #ifdef ENABLE_AHI
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223 D(bug("WaitAudio...Done\n"));
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224
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225 audio->CloseAudio(audio);
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226
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227 D(bug("CloseAudio..Done, subtask exiting...\n"));
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228 audio_configured = 0;
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229 #endif
0
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230 return(0);
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231 }
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232
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233 int SDL_AudioInit(const char *driver_name)
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234 {
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235 SDL_AudioDevice *audio;
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236 int i = 0, idx;
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237
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238 /* Check to make sure we don't overwrite 'current_audio' */
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239 if ( current_audio != NULL ) {
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240 SDL_AudioQuit();
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241 }
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242
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243 /* Select the proper audio driver */
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244 audio = NULL;
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245 idx = 0;
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246 #ifdef unix
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247 if ( (driver_name == NULL) && (getenv("ESPEAKER") != NULL) ) {
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248 /* Ahem, we know that if ESPEAKER is set, user probably wants
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249 to use ESD, but don't start it if it's not already running.
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250 This probably isn't the place to do this, but... Shh! :)
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251 */
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252 for ( i=0; bootstrap[i]; ++i ) {
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253 if ( strcmp(bootstrap[i]->name, "esd") == 0 ) {
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254 const char *esd_no_spawn;
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255
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256 /* Don't start ESD if it's not running */
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257 esd_no_spawn = getenv("ESD_NO_SPAWN");
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258 if ( esd_no_spawn == NULL ) {
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259 putenv("ESD_NO_SPAWN=1");
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260 }
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261 if ( bootstrap[i]->available() ) {
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262 audio = bootstrap[i]->create(0);
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263 break;
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264 }
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265 #ifdef linux /* No unsetenv() on most platforms */
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266 if ( esd_no_spawn == NULL ) {
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267 unsetenv("ESD_NO_SPAWN");
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268 }
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269 #endif
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270 }
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271 }
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272 }
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273 #endif /* unix */
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274 if ( audio == NULL ) {
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275 if ( driver_name != NULL ) {
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276 #if 0 /* This will be replaced with a better driver selection API */
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277 if ( strrchr(driver_name, ':') != NULL ) {
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278 idx = atoi(strrchr(driver_name, ':')+1);
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279 }
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280 #endif
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281 for ( i=0; bootstrap[i]; ++i ) {
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282 if (strncmp(bootstrap[i]->name, driver_name,
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283 strlen(bootstrap[i]->name)) == 0) {
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284 if ( bootstrap[i]->available() ) {
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285 audio=bootstrap[i]->create(idx);
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286 break;
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287 }
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288 }
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289 }
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290 } else {
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291 for ( i=0; bootstrap[i]; ++i ) {
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292 if ( bootstrap[i]->available() ) {
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293 audio = bootstrap[i]->create(idx);
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diff changeset
294 if ( audio != NULL ) {
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295 break;
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296 }
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297 }
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298 }
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299 }
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diff changeset
300 if ( audio == NULL ) {
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diff changeset
301 SDL_SetError("No available audio device");
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diff changeset
302 #if 0 /* Don't fail SDL_Init() if audio isn't available.
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diff changeset
303 SDL_OpenAudio() will handle it at that point. *sigh*
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diff changeset
304 */
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diff changeset
305 return(-1);
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diff changeset
306 #endif
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diff changeset
307 }
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diff changeset
308 }
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diff changeset
309 current_audio = audio;
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diff changeset
310 if ( current_audio ) {
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diff changeset
311 current_audio->name = bootstrap[i]->name;
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diff changeset
312 }
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diff changeset
313 return(0);
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parents:
diff changeset
314 }
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diff changeset
315
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diff changeset
316 char *SDL_AudioDriverName(char *namebuf, int maxlen)
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diff changeset
317 {
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diff changeset
318 if ( current_audio != NULL ) {
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diff changeset
319 strncpy(namebuf, current_audio->name, maxlen-1);
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diff changeset
320 namebuf[maxlen-1] = '\0';
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diff changeset
321 return(namebuf);
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parents:
diff changeset
322 }
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diff changeset
323 return(NULL);
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parents:
diff changeset
324 }
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diff changeset
325
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diff changeset
326 int SDL_OpenAudio(SDL_AudioSpec *desired, SDL_AudioSpec *obtained)
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diff changeset
327 {
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328 SDL_AudioDevice *audio;
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329
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330 /* Start up the audio driver, if necessary */
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diff changeset
331 if ( ! current_audio ) {
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332 if ( (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) ||
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parents:
diff changeset
333 (current_audio == NULL) ) {
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diff changeset
334 return(-1);
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parents:
diff changeset
335 }
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336 }
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337 audio = current_audio;
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338
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parents:
diff changeset
339 /* Verify some parameters */
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parents:
diff changeset
340 if ( desired->callback == NULL ) {
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diff changeset
341 SDL_SetError("SDL_OpenAudio() passed a NULL callback");
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342 return(-1);
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parents:
diff changeset
343 }
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344 switch ( desired->channels ) {
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345 case 1: /* Mono */
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diff changeset
346 case 2: /* Stereo */
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diff changeset
347 break;
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diff changeset
348 default:
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349 SDL_SetError("1 (mono) and 2 (stereo) channels supported");
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350 return(-1);
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parents:
diff changeset
351 }
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352
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diff changeset
353 #ifdef macintosh
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354 /* FIXME: Need to implement PPC interrupt asm for SDL_LockAudio() */
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diff changeset
355 #else
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parents:
diff changeset
356 /* Create a semaphore for locking the sound buffers */
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357 audio->mixer_lock = SDL_CreateMutex();
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parents:
diff changeset
358 if ( audio->mixer_lock == NULL ) {
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diff changeset
359 SDL_SetError("Couldn't create mixer lock");
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360 SDL_CloseAudio();
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361 return(-1);
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parents:
diff changeset
362 }
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diff changeset
363 #endif
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parents:
diff changeset
364
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parents:
diff changeset
365 /* Calculate the silence and size of the audio specification */
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366 SDL_CalculateAudioSpec(desired);
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367
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parents:
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368 /* Open the audio subsystem */
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369 memcpy(&audio->spec, desired, sizeof(audio->spec));
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370 audio->convert.needed = 0;
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diff changeset
371 audio->enabled = 1;
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372 audio->paused = 1;
21
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diff changeset
373
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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parents: 0
diff changeset
374 #ifndef ENABLE_AHI
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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diff changeset
375
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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parents: 0
diff changeset
376 /* AmigaOS opens audio inside the main loop */
0
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diff changeset
377 audio->opened = audio->OpenAudio(audio, &audio->spec)+1;
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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parents: 0
diff changeset
378
0
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parents:
diff changeset
379 if ( ! audio->opened ) {
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diff changeset
380 SDL_CloseAudio();
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parents:
diff changeset
381 return(-1);
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parents:
diff changeset
382 }
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
383 #else
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
384 D(bug("Locking semaphore..."));
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
385 SDL_mutexP(audio->mixer_lock);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
386
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
387 audio->thread = SDL_CreateThread(SDL_RunAudio, audio);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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parents: 0
diff changeset
388 D(bug("Created thread...\n"));
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
389
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
390 if ( audio->thread == NULL ) {
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
391 SDL_mutexV(audio->mixer_lock);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
392 SDL_CloseAudio();
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
393 SDL_SetError("Couldn't create audio thread");
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
394 return(-1);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
395 }
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
396
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
397 while(!audio_configured)
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
398 SDL_Delay(100);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
399 #endif
0
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parents:
diff changeset
400
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parents:
diff changeset
401 /* If the audio driver changes the buffer size, accept it */
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parents:
diff changeset
402 if ( audio->spec.samples != desired->samples ) {
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parents:
diff changeset
403 desired->samples = audio->spec.samples;
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parents:
diff changeset
404 SDL_CalculateAudioSpec(desired);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
405 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
406
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
407 /* Allocate a fake audio memory buffer */
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parents:
diff changeset
408 audio->fake_stream = SDL_AllocAudioMem(audio->spec.size);
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parents:
diff changeset
409 if ( audio->fake_stream == NULL ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
410 SDL_CloseAudio();
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parents:
diff changeset
411 SDL_OutOfMemory();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
412 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
413 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
414
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
415 /* See if we need to do any conversion */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
416 if ( memcmp(desired, &audio->spec, sizeof(audio->spec)) == 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
417 /* Just copy over the desired audio specification */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
418 if ( obtained != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
419 memcpy(obtained, &audio->spec, sizeof(audio->spec));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
420 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
421 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
422 /* Copy over the audio specification if possible */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
423 if ( obtained != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
424 memcpy(obtained, &audio->spec, sizeof(audio->spec));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
425 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
426 /* Build an audio conversion block */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
427 if ( SDL_BuildAudioCVT(&audio->convert,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
428 desired->format, desired->channels,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
429 desired->freq,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
430 audio->spec.format, audio->spec.channels,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
431 audio->spec.freq) < 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
432 SDL_CloseAudio();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
433 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
434 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
435 if ( audio->convert.needed ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
436 audio->convert.len = desired->size;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
437 audio->convert.buf =(Uint8 *)SDL_AllocAudioMem(
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
438 audio->convert.len*audio->convert.len_mult);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
439 if ( audio->convert.buf == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
440 SDL_CloseAudio();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
441 SDL_OutOfMemory();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
442 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
443 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
444 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
445 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
446 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
447
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
448 #ifndef ENABLE_AHI
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
449 /* Start the audio thread if necessary */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
450 switch (audio->opened) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
451 case 1:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
452 /* Start the audio thread */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
453 audio->thread = SDL_CreateThread(SDL_RunAudio, audio);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
454 if ( audio->thread == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
455 SDL_CloseAudio();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
456 SDL_SetError("Couldn't create audio thread");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
457 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
458 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
459 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
460
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
461 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
462 /* The audio is now playing */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
463 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
464 }
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
465 #else
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
466 SDL_mutexV(audio->mixer_lock);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
467 D(bug("SDL_OpenAudio USCITA...\n"));
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
468
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
469 #endif
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
470
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
471 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
472 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
473
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
474 SDL_audiostatus SDL_GetAudioStatus(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
475 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
476 SDL_AudioDevice *audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
477 SDL_audiostatus status;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
478
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
479 status = SDL_AUDIO_STOPPED;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
480 if ( audio && audio->enabled ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
481 if ( audio->paused ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
482 status = SDL_AUDIO_PAUSED;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
483 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
484 status = SDL_AUDIO_PLAYING;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
485 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
486 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
487 return(status);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
488 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
489
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
490 void SDL_PauseAudio (int pause_on)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
491 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
492 SDL_AudioDevice *audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
493
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
494 if ( audio ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
495 audio->paused = pause_on;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
496 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
497 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
498
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
499 void SDL_LockAudio (void)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
500 {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
501 SDL_AudioDevice *audio = current_audio;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
502
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
503 /* Obtain a lock on the mixing buffers */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
504 if ( audio ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
505 if ( audio->thread && (SDL_ThreadID() == audio->threadid) ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
506 return;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
507 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
508 SDL_mutexP(audio->mixer_lock);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
509 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
510 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
511
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
512 void SDL_UnlockAudio (void)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
513 {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
514 SDL_AudioDevice *audio = current_audio;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
515
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
516 /* Release lock on the mixing buffers */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
517 if ( audio ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
518 if ( audio->thread && (SDL_ThreadID() == audio->threadid) ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
519 return;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
520 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
521 SDL_mutexV(audio->mixer_lock);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
522 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
523 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
524
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
525 void SDL_CloseAudio (void)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
526 {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
527 SDL_QuitSubSystem(SDL_INIT_AUDIO);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
528 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
529
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
530 void SDL_AudioQuit(void)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
531 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
532 SDL_AudioDevice *audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
533
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
534 if ( audio ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
535 audio->enabled = 0;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
536 if ( audio->thread != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
537 SDL_WaitThread(audio->thread, NULL);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
538 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
539 if ( audio->mixer_lock != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
540 SDL_DestroyMutex(audio->mixer_lock);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
541 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
542 if ( audio->fake_stream != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
543 SDL_FreeAudioMem(audio->fake_stream);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
544 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
545 if ( audio->convert.needed ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
546 SDL_FreeAudioMem(audio->convert.buf);
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
547
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
548 }
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
549 #ifndef ENABLE_AHI
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
550 if ( audio->opened ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
551 audio->CloseAudio(audio);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
552 audio->opened = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
553 }
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
554 #endif
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
555 /* Free the driver data */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
556 audio->free(audio);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
557 current_audio = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
558 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
559 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
560
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
561 #define NUM_FORMATS 6
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
562 static int format_idx;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
563 static int format_idx_sub;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
564 static Uint16 format_list[NUM_FORMATS][NUM_FORMATS] = {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
565 { AUDIO_U8, AUDIO_S8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
566 { AUDIO_S8, AUDIO_U8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
567 { AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_U8, AUDIO_S8 },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
568 { AUDIO_S16MSB, AUDIO_S16LSB, AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_U8, AUDIO_S8 },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
569 { AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U8, AUDIO_S8 },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
570 { AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_S16MSB, AUDIO_S16LSB, AUDIO_U8, AUDIO_S8 },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
571 };
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
572
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
573 Uint16 SDL_FirstAudioFormat(Uint16 format)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
574 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
575 for ( format_idx=0; format_idx < NUM_FORMATS; ++format_idx ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
576 if ( format_list[format_idx][0] == format ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
577 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
578 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
579 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
580 format_idx_sub = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
581 return(SDL_NextAudioFormat());
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
582 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
583
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
584 Uint16 SDL_NextAudioFormat(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
585 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
586 if ( (format_idx == NUM_FORMATS) || (format_idx_sub == NUM_FORMATS) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
587 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
588 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
589 return(format_list[format_idx][format_idx_sub++]);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
590 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
591
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
592 void SDL_CalculateAudioSpec(SDL_AudioSpec *spec)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
593 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
594 switch (spec->format) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
595 case AUDIO_U8:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
596 spec->silence = 0x80;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
597 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
598 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
599 spec->silence = 0x00;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
600 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
601 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
602 spec->size = (spec->format&0xFF)/8;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
603 spec->size *= spec->channels;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
604 spec->size *= spec->samples;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
605 }