annotate src/audio/SDL_audio.c @ 1190:173c063d4f55

OS/2 port! This was mostly, if not entirely, written by "Doodle" and "Caetano": doodle@scenergy.dfmk.hu daniel@caetano.eng.br --ryan.
author Ryan C. Gordon <icculus@icculus.org>
date Wed, 23 Nov 2005 07:29:56 +0000
parents d74fbf56f2f6
children f9794ee91dfc
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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
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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 #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 #ifdef __OS2__
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42 // We'll need the DosSetPriority() API!
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43 #define INCL_DOSPROCESS
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44 #include <os2.h>
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45 #endif
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46
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47 /* Available audio drivers */
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48 static AudioBootStrap *bootstrap[] = {
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49 #ifdef OPENBSD_AUDIO_SUPPORT
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50 &OPENBSD_AUDIO_bootstrap,
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51 #endif
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52 #ifdef OSS_SUPPORT
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53 &DSP_bootstrap,
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54 &DMA_bootstrap,
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55 #endif
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56 #ifdef ALSA_SUPPORT
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57 &ALSA_bootstrap,
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58 #endif
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59 #ifdef QNXNTOAUDIO_SUPPORT
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60 &QNXNTOAUDIO_bootstrap,
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61 #endif
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62 #ifdef SUNAUDIO_SUPPORT
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63 &SUNAUDIO_bootstrap,
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64 #endif
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65 #ifdef DMEDIA_SUPPORT
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66 &DMEDIA_bootstrap,
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67 #endif
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68 #ifdef ARTSC_SUPPORT
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69 &ARTSC_bootstrap,
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70 #endif
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71 #ifdef ESD_SUPPORT
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72 &ESD_bootstrap,
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73 #endif
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74 #ifdef NAS_SUPPORT
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75 &NAS_bootstrap,
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76 #endif
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77 #ifdef ENABLE_DIRECTX
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78 &DSOUND_bootstrap,
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79 #endif
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80 #ifdef ENABLE_WINDIB
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81 &WAVEOUT_bootstrap,
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82 #endif
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83 #ifdef __BEOS__
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84 &BAUDIO_bootstrap,
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85 #endif
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86 #ifdef MACOSX
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87 &COREAUDIO_bootstrap,
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88 #endif
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89 #if defined(macintosh) || TARGET_API_MAC_CARBON
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90 &SNDMGR_bootstrap,
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91 #endif
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92 #ifdef _AIX
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93 &Paud_bootstrap,
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94 #endif
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95 #ifdef ENABLE_AHI
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96 &AHI_bootstrap,
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97 #endif
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98 #ifdef MMEAUDIO_SUPPORT
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99 &MMEAUDIO_bootstrap,
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100 #endif
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101 #ifdef MINTAUDIO_SUPPORT
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102 &MINTAUDIO_GSXB_bootstrap,
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103 &MINTAUDIO_MCSN_bootstrap,
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104 &MINTAUDIO_STFA_bootstrap,
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105 &MINTAUDIO_XBIOS_bootstrap,
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106 &MINTAUDIO_DMA8_bootstrap,
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107 #endif
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108 #ifdef DISKAUD_SUPPORT
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109 &DISKAUD_bootstrap,
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110 #endif
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111 #ifdef ENABLE_DC
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112 &DCAUD_bootstrap,
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113 #endif
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114 #ifdef DRENDERER_SUPPORT
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115 &DRENDERER_bootstrap,
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116 #endif
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117 #ifdef __OS2__
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118 &DART_bootstrap,
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119 #endif
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120 NULL
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121 };
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122 SDL_AudioDevice *current_audio = NULL;
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123
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124 /* Various local functions */
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125 int SDL_AudioInit(const char *driver_name);
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126 void SDL_AudioQuit(void);
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127
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128 #ifdef ENABLE_AHI
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129 static int audio_configured = 0;
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130 #endif
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131
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132 /* The general mixing thread function */
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133 int SDL_RunAudio(void *audiop)
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134 {
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135 SDL_AudioDevice *audio = (SDL_AudioDevice *)audiop;
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136 Uint8 *stream;
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137 int stream_len;
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138 void *udata;
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139 void (*fill)(void *userdata,Uint8 *stream, int len);
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140 int silence;
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141 #ifdef ENABLE_AHI
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142 int started = 0;
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143
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144 /* AmigaOS NEEDS that the audio driver is opened in the thread that uses it! */
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145
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146 D(bug("Task audio started audio struct:<%lx>...\n",audiop));
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147
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148 D(bug("Before Openaudio..."));
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149 if(audio->OpenAudio(audio, &audio->spec)==-1)
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150 {
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151 D(bug("Open audio failed...\n"));
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152 return(-1);
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153 }
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154 D(bug("OpenAudio...OK\n"));
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155 #endif
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156
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157 /* Perform any thread setup */
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158 if ( audio->ThreadInit ) {
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159 audio->ThreadInit(audio);
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160 }
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161 audio->threadid = SDL_ThreadID();
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162
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163 /* Set up the mixing function */
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164 fill = audio->spec.callback;
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165 udata = audio->spec.userdata;
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166
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167 #ifdef ENABLE_AHI
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168 audio_configured = 1;
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169
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170 D(bug("Audio configured... Checking for conversion\n"));
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171 SDL_mutexP(audio->mixer_lock);
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172 D(bug("Semaphore obtained...\n"));
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173 #endif
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174
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175 if ( audio->convert.needed ) {
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176 if ( audio->convert.src_format == AUDIO_U8 ) {
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177 silence = 0x80;
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178 } else {
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179 silence = 0;
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180 }
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181 stream_len = audio->convert.len;
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182 } else {
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183 silence = audio->spec.silence;
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184 stream_len = audio->spec.size;
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185 }
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186 stream = audio->fake_stream;
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187
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188 #ifdef ENABLE_AHI
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189 SDL_mutexV(audio->mixer_lock);
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190 D(bug("Entering audio loop...\n"));
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191 #endif
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192
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193 #ifdef __OS2__
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194 // Increase the priority of this thread to make sure that
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195 // the audio will be continuous all the time!
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196 #ifdef USE_DOSSETPRIORITY
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197 #ifdef DEBUG_BUILD
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198 printf("[SDL_RunAudio] : Setting priority to ForegroundServer+0! (TID%d)\n", SDL_ThreadID());
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199 #endif
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200 DosSetPriority(PRTYS_THREAD, PRTYC_FOREGROUNDSERVER, 0, 0);
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201 #endif
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202 #endif
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203
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204 /* Loop, filling the audio buffers */
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205 while ( audio->enabled ) {
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206
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207 /* Wait for new current buffer to finish playing */
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208 if ( stream == audio->fake_stream ) {
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209 SDL_Delay((audio->spec.samples*1000)/audio->spec.freq);
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210 } else {
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211 #ifdef ENABLE_AHI
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212 if ( started > 1 )
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213 #endif
0
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214 audio->WaitAudio(audio);
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215 }
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216
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217 /* Fill the current buffer with sound */
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218 if ( audio->convert.needed ) {
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219 if ( audio->convert.buf ) {
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220 stream = audio->convert.buf;
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221 } else {
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222 continue;
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223 }
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224 } else {
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225 stream = audio->GetAudioBuf(audio);
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226 if ( stream == NULL ) {
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227 stream = audio->fake_stream;
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228 }
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229 }
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230 memset(stream, silence, stream_len);
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231
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232 if ( ! audio->paused ) {
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233 SDL_mutexP(audio->mixer_lock);
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234 (*fill)(udata, stream, stream_len);
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235 SDL_mutexV(audio->mixer_lock);
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236 }
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237
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238 /* Convert the audio if necessary */
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239 if ( audio->convert.needed ) {
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240 SDL_ConvertAudio(&audio->convert);
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241 stream = audio->GetAudioBuf(audio);
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242 if ( stream == NULL ) {
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243 stream = audio->fake_stream;
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244 }
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245 memcpy(stream, audio->convert.buf,
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246 audio->convert.len_cvt);
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247 }
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248
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249 /* Ready current buffer for play and change current buffer */
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250 if ( stream != audio->fake_stream ) {
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251 audio->PlayAudio(audio);
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252 #ifdef ENABLE_AHI
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253 /* AmigaOS don't have to wait the first time audio is played! */
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254 started++;
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255 #endif
0
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256 }
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257 }
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258 /* Wait for the audio to drain.. */
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259 if ( audio->WaitDone ) {
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260 audio->WaitDone(audio);
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261 }
21
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262
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263 #ifdef ENABLE_AHI
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diff changeset
264 D(bug("WaitAudio...Done\n"));
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265
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266 audio->CloseAudio(audio);
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267
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268 D(bug("CloseAudio..Done, subtask exiting...\n"));
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269 audio_configured = 0;
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diff changeset
270 #endif
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271 #ifdef __OS2__
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272 #ifdef DEBUG_BUILD
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273 printf("[SDL_RunAudio] : Task exiting. (TID%d)\n", SDL_ThreadID());
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274 #endif
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275 #endif
0
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276 return(0);
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277 }
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278
322
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279 static void SDL_LockAudio_Default(SDL_AudioDevice *audio)
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280 {
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281 if ( audio->thread && (SDL_ThreadID() == audio->threadid) ) {
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282 return;
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
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diff changeset
283 }
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284 SDL_mutexP(audio->mixer_lock);
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285 }
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286
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diff changeset
287 static void SDL_UnlockAudio_Default(SDL_AudioDevice *audio)
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diff changeset
288 {
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diff changeset
289 if ( audio->thread && (SDL_ThreadID() == audio->threadid) ) {
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diff changeset
290 return;
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diff changeset
291 }
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292 SDL_mutexV(audio->mixer_lock);
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diff changeset
293 }
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diff changeset
294
0
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295 int SDL_AudioInit(const char *driver_name)
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diff changeset
296 {
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297 SDL_AudioDevice *audio;
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298 int i = 0, idx;
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299
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diff changeset
300 /* Check to make sure we don't overwrite 'current_audio' */
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diff changeset
301 if ( current_audio != NULL ) {
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diff changeset
302 SDL_AudioQuit();
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diff changeset
303 }
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diff changeset
304
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305 /* Select the proper audio driver */
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diff changeset
306 audio = NULL;
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diff changeset
307 idx = 0;
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diff changeset
308 #ifdef unix
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diff changeset
309 if ( (driver_name == NULL) && (getenv("ESPEAKER") != NULL) ) {
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diff changeset
310 /* Ahem, we know that if ESPEAKER is set, user probably wants
74212992fb08 Initial revision
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diff changeset
311 to use ESD, but don't start it if it's not already running.
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312 This probably isn't the place to do this, but... Shh! :)
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313 */
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314 for ( i=0; bootstrap[i]; ++i ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
315 if ( strcmp(bootstrap[i]->name, "esd") == 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
316 const char *esd_no_spawn;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
317
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
318 /* Don't start ESD if it's not running */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
319 esd_no_spawn = getenv("ESD_NO_SPAWN");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
320 if ( esd_no_spawn == NULL ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
321 putenv("ESD_NO_SPAWN=1");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
322 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
323 if ( bootstrap[i]->available() ) {
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parents:
diff changeset
324 audio = bootstrap[i]->create(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
325 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
326 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
327 #ifdef linux /* No unsetenv() on most platforms */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
328 if ( esd_no_spawn == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
329 unsetenv("ESD_NO_SPAWN");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
330 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
331 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
332 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
333 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
334 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
335 #endif /* unix */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
336 if ( audio == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
337 if ( driver_name != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
338 #if 0 /* This will be replaced with a better driver selection API */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
339 if ( strrchr(driver_name, ':') != NULL ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
340 idx = atoi(strrchr(driver_name, ':')+1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
341 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
342 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
343 for ( i=0; bootstrap[i]; ++i ) {
74212992fb08 Initial revision
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parents:
diff changeset
344 if (strncmp(bootstrap[i]->name, driver_name,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
345 strlen(bootstrap[i]->name)) == 0) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
346 if ( bootstrap[i]->available() ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
347 audio=bootstrap[i]->create(idx);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
348 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
349 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
350 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
351 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
352 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
353 for ( i=0; bootstrap[i]; ++i ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
354 if ( bootstrap[i]->available() ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
355 audio = bootstrap[i]->create(idx);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
356 if ( audio != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
357 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
358 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
359 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
360 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
361 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
362 if ( audio == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
363 SDL_SetError("No available audio device");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
364 #if 0 /* Don't fail SDL_Init() if audio isn't available.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
365 SDL_OpenAudio() will handle it at that point. *sigh*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
366 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
367 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
368 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
369 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
370 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
371 current_audio = audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
372 if ( current_audio ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
373 current_audio->name = bootstrap[i]->name;
322
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
374 if ( !current_audio->LockAudio && !current_audio->UnlockAudio ) {
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
375 current_audio->LockAudio = SDL_LockAudio_Default;
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
376 current_audio->UnlockAudio = SDL_UnlockAudio_Default;
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
377 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
378 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
379 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
380 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
381
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
382 char *SDL_AudioDriverName(char *namebuf, int maxlen)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
383 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
384 if ( current_audio != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
385 strncpy(namebuf, current_audio->name, maxlen-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
386 namebuf[maxlen-1] = '\0';
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
387 return(namebuf);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
388 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
389 return(NULL);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
390 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
391
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
392 int SDL_OpenAudio(SDL_AudioSpec *desired, SDL_AudioSpec *obtained)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
393 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
394 SDL_AudioDevice *audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
395
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
396 /* Start up the audio driver, if necessary */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
397 if ( ! current_audio ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
398 if ( (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) ||
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
399 (current_audio == NULL) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
400 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
401 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
402 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403 audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
404
262
ba5363e21df8 Don't allow multiple audio opens to succeed (until SDL 1.3)
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
405 if (audio->opened) {
ba5363e21df8 Don't allow multiple audio opens to succeed (until SDL 1.3)
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
406 SDL_SetError("Audio device is already opened");
ba5363e21df8 Don't allow multiple audio opens to succeed (until SDL 1.3)
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
407 return(-1);
ba5363e21df8 Don't allow multiple audio opens to succeed (until SDL 1.3)
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
408 }
ba5363e21df8 Don't allow multiple audio opens to succeed (until SDL 1.3)
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
409
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
410 /* Verify some parameters */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
411 if ( desired->callback == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
412 SDL_SetError("SDL_OpenAudio() passed a NULL callback");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
413 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
414 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
415 switch ( desired->channels ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
416 case 1: /* Mono */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
417 case 2: /* Stereo */
942
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents: 936
diff changeset
418 case 4: /* surround */
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents: 936
diff changeset
419 case 6: /* surround with center and lfe */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
420 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
421 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
422 SDL_SetError("1 (mono) and 2 (stereo) channels supported");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
423 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
424 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
425
955
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 942
diff changeset
426 #if defined(macintosh) || (defined(__riscos__) && !defined(DISABLE_THREADS))
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
427 /* FIXME: Need to implement PPC interrupt asm for SDL_LockAudio() */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
428 #else
398
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents: 322
diff changeset
429 #if defined(__MINT__) && !defined(ENABLE_THREADS)
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents: 322
diff changeset
430 /* Uses interrupt driven audio, without thread */
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents: 322
diff changeset
431 #else
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
432 /* Create a semaphore for locking the sound buffers */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
433 audio->mixer_lock = SDL_CreateMutex();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
434 if ( audio->mixer_lock == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
435 SDL_SetError("Couldn't create mixer lock");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
436 SDL_CloseAudio();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
437 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
438 }
398
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents: 322
diff changeset
439 #endif /* __MINT__ */
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents: 322
diff changeset
440 #endif /* macintosh */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
441
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
442 /* Calculate the silence and size of the audio specification */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
443 SDL_CalculateAudioSpec(desired);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
444
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
445 /* Open the audio subsystem */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
446 memcpy(&audio->spec, desired, sizeof(audio->spec));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
447 audio->convert.needed = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
448 audio->enabled = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
449 audio->paused = 1;
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
450
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
451 #ifndef ENABLE_AHI
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
452
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
453 /* AmigaOS opens audio inside the main loop */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
454 audio->opened = audio->OpenAudio(audio, &audio->spec)+1;
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
455
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
456 if ( ! audio->opened ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
457 SDL_CloseAudio();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
458 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
459 }
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
460 #else
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
461 D(bug("Locking semaphore..."));
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
462 SDL_mutexP(audio->mixer_lock);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
463
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
464 audio->thread = SDL_CreateThread(SDL_RunAudio, audio);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
465 D(bug("Created thread...\n"));
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
466
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
467 if ( audio->thread == NULL ) {
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
468 SDL_mutexV(audio->mixer_lock);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
469 SDL_CloseAudio();
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
470 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
471 return(-1);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
472 }
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
473
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
474 while(!audio_configured)
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
475 SDL_Delay(100);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
476 #endif
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
477
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
478 /* If the audio driver changes the buffer size, accept it */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
479 if ( audio->spec.samples != desired->samples ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
480 desired->samples = audio->spec.samples;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
481 SDL_CalculateAudioSpec(desired);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
482 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
483
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
484 /* Allocate a fake audio memory buffer */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
485 audio->fake_stream = SDL_AllocAudioMem(audio->spec.size);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
486 if ( audio->fake_stream == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
487 SDL_CloseAudio();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
488 SDL_OutOfMemory();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
489 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
490 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
491
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
492 /* See if we need to do any conversion */
808
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
493 if ( obtained != NULL ) {
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
494 memcpy(obtained, &audio->spec, sizeof(audio->spec));
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
495 } else if ( desired->freq != audio->spec.freq ||
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
496 desired->format != audio->spec.format ||
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
497 desired->channels != audio->spec.channels ) {
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
498 /* Build an audio conversion block */
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
499 if ( SDL_BuildAudioCVT(&audio->convert,
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
500 desired->format, desired->channels,
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
501 desired->freq,
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
502 audio->spec.format, audio->spec.channels,
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
503 audio->spec.freq) < 0 ) {
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
504 SDL_CloseAudio();
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
505 return(-1);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
506 }
808
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
507 if ( audio->convert.needed ) {
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
508 audio->convert.len = desired->size;
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
509 audio->convert.buf =(Uint8 *)SDL_AllocAudioMem(
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
510 audio->convert.len*audio->convert.len_mult);
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
511 if ( audio->convert.buf == NULL ) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
512 SDL_CloseAudio();
808
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
513 SDL_OutOfMemory();
0
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
514 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
515 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
516 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
517 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
518
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
519 #ifndef ENABLE_AHI
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
520 /* Start the audio thread if necessary */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
521 switch (audio->opened) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
522 case 1:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
523 /* Start the audio thread */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
524 audio->thread = SDL_CreateThread(SDL_RunAudio, audio);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
525 if ( audio->thread == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
526 SDL_CloseAudio();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
527 SDL_SetError("Couldn't create audio thread");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
528 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
529 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
530 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
531
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
532 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
533 /* The audio is now playing */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
534 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
535 }
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
536 #else
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
537 SDL_mutexV(audio->mixer_lock);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
538 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
539
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
540 #endif
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
541
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
542 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
543 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
544
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
545 SDL_audiostatus SDL_GetAudioStatus(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
546 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
547 SDL_AudioDevice *audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
548 SDL_audiostatus status;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
549
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
550 status = SDL_AUDIO_STOPPED;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
551 if ( audio && audio->enabled ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
552 if ( audio->paused ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
553 status = SDL_AUDIO_PAUSED;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
554 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
555 status = SDL_AUDIO_PLAYING;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
556 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
557 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
558 return(status);
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 void SDL_PauseAudio (int pause_on)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
562 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
563 SDL_AudioDevice *audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
564
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
565 if ( audio ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
566 audio->paused = pause_on;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
567 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
568 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
569
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
570 void SDL_LockAudio (void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
571 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
572 SDL_AudioDevice *audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
573
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
574 /* Obtain a lock on the mixing buffers */
322
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
575 if ( audio && audio->LockAudio ) {
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
576 audio->LockAudio(audio);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
577 }
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 void SDL_UnlockAudio (void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
581 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
582 SDL_AudioDevice *audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
583
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
584 /* Release lock on the mixing buffers */
322
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
585 if ( audio && audio->UnlockAudio ) {
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
586 audio->UnlockAudio(audio);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
587 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
588 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
589
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
590 void SDL_CloseAudio (void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
591 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
592 SDL_QuitSubSystem(SDL_INIT_AUDIO);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
593 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
594
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
595 void SDL_AudioQuit(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
596 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
597 SDL_AudioDevice *audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
598
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
599 if ( audio ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
600 audio->enabled = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
601 if ( audio->thread != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
602 SDL_WaitThread(audio->thread, NULL);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
603 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
604 if ( audio->mixer_lock != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
605 SDL_DestroyMutex(audio->mixer_lock);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
606 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
607 if ( audio->fake_stream != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
608 SDL_FreeAudioMem(audio->fake_stream);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
609 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
610 if ( audio->convert.needed ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
611 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
612
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
613 }
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
614 #ifndef ENABLE_AHI
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
615 if ( audio->opened ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
616 audio->CloseAudio(audio);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
617 audio->opened = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
618 }
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
619 #endif
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
620 /* Free the driver data */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
621 audio->free(audio);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
622 current_audio = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
623 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
624 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
625
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
626 #define NUM_FORMATS 6
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
627 static int format_idx;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
628 static int format_idx_sub;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
629 static Uint16 format_list[NUM_FORMATS][NUM_FORMATS] = {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
630 { AUDIO_U8, AUDIO_S8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
631 { AUDIO_S8, AUDIO_U8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
632 { AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_U8, AUDIO_S8 },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
633 { AUDIO_S16MSB, AUDIO_S16LSB, AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_U8, AUDIO_S8 },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
634 { AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U8, AUDIO_S8 },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
635 { AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_S16MSB, AUDIO_S16LSB, AUDIO_U8, AUDIO_S8 },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
636 };
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
637
74212992fb08 Initial revision
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638 Uint16 SDL_FirstAudioFormat(Uint16 format)
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639 {
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640 for ( format_idx=0; format_idx < NUM_FORMATS; ++format_idx ) {
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641 if ( format_list[format_idx][0] == format ) {
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642 break;
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643 }
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644 }
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645 format_idx_sub = 0;
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646 return(SDL_NextAudioFormat());
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647 }
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648
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649 Uint16 SDL_NextAudioFormat(void)
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650 {
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651 if ( (format_idx == NUM_FORMATS) || (format_idx_sub == NUM_FORMATS) ) {
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652 return(0);
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653 }
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654 return(format_list[format_idx][format_idx_sub++]);
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655 }
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656
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657 void SDL_CalculateAudioSpec(SDL_AudioSpec *spec)
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658 {
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659 switch (spec->format) {
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660 case AUDIO_U8:
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661 spec->silence = 0x80;
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662 break;
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663 default:
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664 spec->silence = 0x00;
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665 break;
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666 }
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667 spec->size = (spec->format&0xFF)/8;
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668 spec->size *= spec->channels;
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669 spec->size *= spec->samples;
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670 }