annotate src/audio/SDL_audio.c @ 38:80139f9b90d8

Oops, typo fix
author Sam Lantinga <slouken@lokigames.com>
date Sat, 26 May 2001 21:39:01 +0000
parents 3ad7157c6cfa
children ac6645260d31
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 OSS_SUPPORT
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44 &DSP_bootstrap,
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45 &DMA_bootstrap,
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46 #endif
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47 #ifdef ALSA_SUPPORT
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48 &ALSA_bootstrap,
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49 #endif
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50 #ifdef __OpenBSD__
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51 &OBSD_bootstrap,
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52 #endif
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53 #if (defined(unix) && !defined(__CYGWIN32__)) && \
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54 !defined(OSS_SUPPORT) && !defined(ALSA_SUPPORT)
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55 &AUDIO_bootstrap,
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56 #endif
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57 #ifdef ARTSC_SUPPORT
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58 &ARTSC_bootstrap,
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59 #endif
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60 #ifdef ESD_SUPPORT
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61 &ESD_bootstrap,
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62 #endif
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63 #ifdef NAS_SUPPORT
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64 &NAS_bootstrap,
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65 #endif
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66 #ifdef ENABLE_DIRECTX
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67 &DSOUND_bootstrap,
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68 #endif
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69 #ifdef ENABLE_WINDIB
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70 &WAVEOUT_bootstrap,
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71 #endif
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72 #ifdef __BEOS__
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73 &BAUDIO_bootstrap,
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74 #endif
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75 #if defined(macintosh) || TARGET_API_MAC_CARBON
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76 &SNDMGR_bootstrap,
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77 #endif
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78 #ifdef _AIX
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79 &Paud_bootstrap,
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80 #endif
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81 #ifdef ENABLE_AHI
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82 &AHI_bootstrap,
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83 #endif
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84
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85 NULL
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86 };
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87 SDL_AudioDevice *current_audio = NULL;
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88
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89 /* Various local functions */
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90 int SDL_AudioInit(const char *driver_name);
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91 void SDL_AudioQuit(void);
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92
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93 #ifdef ENABLE_AHI
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94 static int audio_configured = 0;
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95 #endif
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96
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97 /* The general mixing thread function */
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98 int SDL_RunAudio(void *audiop)
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99 {
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100 SDL_AudioDevice *audio = (SDL_AudioDevice *)audiop;
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101 Uint8 *stream;
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102 int stream_len;
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103 void *udata;
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104 void (*fill)(void *userdata,Uint8 *stream, int len);
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105 int silence;
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106 #ifdef ENABLE_AHI
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107 int started = 0;
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108
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109 /* AmigaOS NEEDS that the audio driver is opened in the thread that uses it! */
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110
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111 D(bug("Task audio started audio struct:<%lx>...\n",audiop));
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112
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113 D(bug("Before Openaudio..."));
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114 if(audio->OpenAudio(audio, &audio->spec)==-1)
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115 {
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116 D(bug("Open audio failed...\n"));
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117 return(-1);
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118 }
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119 D(bug("OpenAudio...OK\n"));
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120 #endif
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121
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122 /* Perform any thread setup */
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123 if ( audio->ThreadInit ) {
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124 audio->ThreadInit(audio);
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125 }
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126 audio->threadid = SDL_ThreadID();
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127
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128 /* Set up the mixing function */
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129 fill = audio->spec.callback;
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130 udata = audio->spec.userdata;
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131
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132 #ifdef ENABLE_AHI
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133 audio_configured = 1;
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134
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135 D(bug("Audio configured... Checking for conversion\n"));
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136 SDL_mutexP(audio->mixer_lock);
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137 D(bug("Semaphore obtained...\n"));
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138 #endif
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139
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140 if ( audio->convert.needed ) {
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141 if ( audio->convert.src_format == AUDIO_U8 ) {
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142 silence = 0x80;
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143 } else {
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144 silence = 0;
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145 }
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146 stream_len = audio->convert.len;
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147 } else {
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148 silence = audio->spec.silence;
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149 stream_len = audio->spec.size;
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150 }
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151 stream = audio->fake_stream;
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152
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153 #ifdef ENABLE_AHI
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154 SDL_mutexV(audio->mixer_lock);
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155 D(bug("Entering audio loop...\n"));
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156 #endif
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157
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158
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159 /* Loop, filling the audio buffers */
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160 while ( audio->enabled ) {
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161
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162 /* Wait for new current buffer to finish playing */
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163 if ( stream == audio->fake_stream ) {
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164 SDL_Delay((audio->spec.samples*1000)/audio->spec.freq);
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165 } else {
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166 #ifdef ENABLE_AHI
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diff changeset
167 if ( started > 1 )
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168 #endif
0
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169 audio->WaitAudio(audio);
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170 }
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171
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172 /* Fill the current buffer with sound */
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173 if ( audio->convert.needed ) {
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174 if ( audio->convert.buf ) {
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175 stream = audio->convert.buf;
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176 } else {
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177 continue;
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178 }
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179 } else {
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180 stream = audio->GetAudioBuf(audio);
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181 if ( stream == NULL ) {
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182 stream = audio->fake_stream;
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183 }
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184 }
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185 memset(stream, silence, stream_len);
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186
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187 if ( ! audio->paused ) {
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188 SDL_mutexP(audio->mixer_lock);
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189 (*fill)(udata, stream, stream_len);
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190 SDL_mutexV(audio->mixer_lock);
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191 }
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192
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193 /* Convert the audio if necessary */
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194 if ( audio->convert.needed ) {
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195 SDL_ConvertAudio(&audio->convert);
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196 stream = audio->GetAudioBuf(audio);
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197 if ( stream == NULL ) {
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198 stream = audio->fake_stream;
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199 }
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200 memcpy(stream, audio->convert.buf,
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201 audio->convert.len_cvt);
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202 }
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203
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204 /* Ready current buffer for play and change current buffer */
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205 if ( stream != audio->fake_stream ) {
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206 audio->PlayAudio(audio);
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207 #ifdef ENABLE_AHI
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208 /* AmigaOS don't have to wait the first time audio is played! */
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diff changeset
209 started++;
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diff changeset
210 #endif
0
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211 }
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212 }
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213 /* Wait for the audio to drain.. */
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214 if ( audio->WaitDone ) {
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215 audio->WaitDone(audio);
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216 }
21
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217
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diff changeset
218 #ifdef ENABLE_AHI
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diff changeset
219 D(bug("WaitAudio...Done\n"));
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220
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diff changeset
221 audio->CloseAudio(audio);
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diff changeset
222
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diff changeset
223 D(bug("CloseAudio..Done, subtask exiting...\n"));
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diff changeset
224 audio_configured = 0;
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diff changeset
225 #endif
0
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226 return(0);
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227 }
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228
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229 int SDL_AudioInit(const char *driver_name)
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230 {
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231 SDL_AudioDevice *audio;
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232 int i = 0, idx;
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233
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234 /* Check to make sure we don't overwrite 'current_audio' */
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235 if ( current_audio != NULL ) {
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236 SDL_AudioQuit();
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237 }
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238
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diff changeset
239 /* Select the proper audio driver */
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diff changeset
240 audio = NULL;
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diff changeset
241 idx = 0;
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diff changeset
242 #ifdef unix
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diff changeset
243 if ( (driver_name == NULL) && (getenv("ESPEAKER") != NULL) ) {
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244 /* Ahem, we know that if ESPEAKER is set, user probably wants
74212992fb08 Initial revision
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diff changeset
245 to use ESD, but don't start it if it's not already running.
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diff changeset
246 This probably isn't the place to do this, but... Shh! :)
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247 */
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diff changeset
248 for ( i=0; bootstrap[i]; ++i ) {
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diff changeset
249 if ( strcmp(bootstrap[i]->name, "esd") == 0 ) {
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diff changeset
250 const char *esd_no_spawn;
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diff changeset
251
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diff changeset
252 /* Don't start ESD if it's not running */
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diff changeset
253 esd_no_spawn = getenv("ESD_NO_SPAWN");
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parents:
diff changeset
254 if ( esd_no_spawn == NULL ) {
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diff changeset
255 putenv("ESD_NO_SPAWN=1");
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parents:
diff changeset
256 }
74212992fb08 Initial revision
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parents:
diff changeset
257 if ( bootstrap[i]->available() ) {
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diff changeset
258 audio = bootstrap[i]->create(0);
74212992fb08 Initial revision
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parents:
diff changeset
259 break;
74212992fb08 Initial revision
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parents:
diff changeset
260 }
74212992fb08 Initial revision
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diff changeset
261 #ifdef linux /* No unsetenv() on most platforms */
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parents:
diff changeset
262 if ( esd_no_spawn == NULL ) {
74212992fb08 Initial revision
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parents:
diff changeset
263 unsetenv("ESD_NO_SPAWN");
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parents:
diff changeset
264 }
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parents:
diff changeset
265 #endif
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parents:
diff changeset
266 }
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parents:
diff changeset
267 }
74212992fb08 Initial revision
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parents:
diff changeset
268 }
74212992fb08 Initial revision
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parents:
diff changeset
269 #endif /* unix */
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parents:
diff changeset
270 if ( audio == NULL ) {
74212992fb08 Initial revision
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parents:
diff changeset
271 if ( driver_name != NULL ) {
74212992fb08 Initial revision
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parents:
diff changeset
272 #if 0 /* This will be replaced with a better driver selection API */
74212992fb08 Initial revision
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parents:
diff changeset
273 if ( strrchr(driver_name, ':') != NULL ) {
74212992fb08 Initial revision
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diff changeset
274 idx = atoi(strrchr(driver_name, ':')+1);
74212992fb08 Initial revision
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parents:
diff changeset
275 }
74212992fb08 Initial revision
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parents:
diff changeset
276 #endif
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parents:
diff changeset
277 for ( i=0; bootstrap[i]; ++i ) {
74212992fb08 Initial revision
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parents:
diff changeset
278 if (strncmp(bootstrap[i]->name, driver_name,
74212992fb08 Initial revision
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parents:
diff changeset
279 strlen(bootstrap[i]->name)) == 0) {
74212992fb08 Initial revision
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parents:
diff changeset
280 if ( bootstrap[i]->available() ) {
74212992fb08 Initial revision
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diff changeset
281 audio=bootstrap[i]->create(idx);
74212992fb08 Initial revision
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parents:
diff changeset
282 break;
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parents:
diff changeset
283 }
74212992fb08 Initial revision
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parents:
diff changeset
284 }
74212992fb08 Initial revision
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parents:
diff changeset
285 }
74212992fb08 Initial revision
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diff changeset
286 } else {
74212992fb08 Initial revision
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parents:
diff changeset
287 for ( i=0; bootstrap[i]; ++i ) {
74212992fb08 Initial revision
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parents:
diff changeset
288 if ( bootstrap[i]->available() ) {
74212992fb08 Initial revision
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parents:
diff changeset
289 audio = bootstrap[i]->create(idx);
74212992fb08 Initial revision
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parents:
diff changeset
290 if ( audio != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
291 break;
74212992fb08 Initial revision
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parents:
diff changeset
292 }
74212992fb08 Initial revision
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parents:
diff changeset
293 }
74212992fb08 Initial revision
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parents:
diff changeset
294 }
74212992fb08 Initial revision
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parents:
diff changeset
295 }
74212992fb08 Initial revision
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parents:
diff changeset
296 if ( audio == NULL ) {
74212992fb08 Initial revision
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parents:
diff changeset
297 SDL_SetError("No available audio device");
74212992fb08 Initial revision
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parents:
diff changeset
298 #if 0 /* Don't fail SDL_Init() if audio isn't available.
74212992fb08 Initial revision
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parents:
diff changeset
299 SDL_OpenAudio() will handle it at that point. *sigh*
74212992fb08 Initial revision
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parents:
diff changeset
300 */
74212992fb08 Initial revision
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parents:
diff changeset
301 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
302 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
303 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
304 }
74212992fb08 Initial revision
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parents:
diff changeset
305 current_audio = audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
306 if ( current_audio ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
307 current_audio->name = bootstrap[i]->name;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
308 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
309 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
310 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
311
74212992fb08 Initial revision
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parents:
diff changeset
312 char *SDL_AudioDriverName(char *namebuf, int maxlen)
74212992fb08 Initial revision
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parents:
diff changeset
313 {
74212992fb08 Initial revision
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parents:
diff changeset
314 if ( current_audio != NULL ) {
74212992fb08 Initial revision
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parents:
diff changeset
315 strncpy(namebuf, current_audio->name, maxlen-1);
74212992fb08 Initial revision
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parents:
diff changeset
316 namebuf[maxlen-1] = '\0';
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
317 return(namebuf);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
318 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
319 return(NULL);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
320 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
321
74212992fb08 Initial revision
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parents:
diff changeset
322 int SDL_OpenAudio(SDL_AudioSpec *desired, SDL_AudioSpec *obtained)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
323 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
324 SDL_AudioDevice *audio;
74212992fb08 Initial revision
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parents:
diff changeset
325
74212992fb08 Initial revision
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parents:
diff changeset
326 /* Start up the audio driver, if necessary */
74212992fb08 Initial revision
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parents:
diff changeset
327 if ( ! current_audio ) {
74212992fb08 Initial revision
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parents:
diff changeset
328 if ( (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) ||
74212992fb08 Initial revision
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parents:
diff changeset
329 (current_audio == NULL) ) {
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diff changeset
330 return(-1);
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parents:
diff changeset
331 }
74212992fb08 Initial revision
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parents:
diff changeset
332 }
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diff changeset
333 audio = current_audio;
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parents:
diff changeset
334
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parents:
diff changeset
335 /* Verify some parameters */
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parents:
diff changeset
336 if ( desired->callback == NULL ) {
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parents:
diff changeset
337 SDL_SetError("SDL_OpenAudio() passed a NULL callback");
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parents:
diff changeset
338 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
339 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
340 switch ( desired->channels ) {
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parents:
diff changeset
341 case 1: /* Mono */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
342 case 2: /* Stereo */
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parents:
diff changeset
343 break;
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parents:
diff changeset
344 default:
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parents:
diff changeset
345 SDL_SetError("1 (mono) and 2 (stereo) channels supported");
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parents:
diff changeset
346 return(-1);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
347 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
348
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parents:
diff changeset
349 #ifdef macintosh
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parents:
diff changeset
350 /* FIXME: Need to implement PPC interrupt asm for SDL_LockAudio() */
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parents:
diff changeset
351 #else
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parents:
diff changeset
352 /* Create a semaphore for locking the sound buffers */
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parents:
diff changeset
353 audio->mixer_lock = SDL_CreateMutex();
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parents:
diff changeset
354 if ( audio->mixer_lock == NULL ) {
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parents:
diff changeset
355 SDL_SetError("Couldn't create mixer lock");
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parents:
diff changeset
356 SDL_CloseAudio();
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parents:
diff changeset
357 return(-1);
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parents:
diff changeset
358 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
359 #endif
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parents:
diff changeset
360
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parents:
diff changeset
361 /* Calculate the silence and size of the audio specification */
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parents:
diff changeset
362 SDL_CalculateAudioSpec(desired);
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parents:
diff changeset
363
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parents:
diff changeset
364 /* Open the audio subsystem */
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parents:
diff changeset
365 memcpy(&audio->spec, desired, sizeof(audio->spec));
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parents:
diff changeset
366 audio->convert.needed = 0;
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parents:
diff changeset
367 audio->enabled = 1;
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parents:
diff changeset
368 audio->paused = 1;
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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parents: 0
diff changeset
369
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
370 #ifndef ENABLE_AHI
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
371
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
372 /* AmigaOS opens audio inside the main loop */
0
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parents:
diff changeset
373 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
374
0
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parents:
diff changeset
375 if ( ! audio->opened ) {
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parents:
diff changeset
376 SDL_CloseAudio();
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
377 return(-1);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
378 }
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
379 #else
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
380 D(bug("Locking semaphore..."));
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
381 SDL_mutexP(audio->mixer_lock);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
382
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
383 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
384 D(bug("Created thread...\n"));
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
385
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
386 if ( audio->thread == NULL ) {
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
387 SDL_mutexV(audio->mixer_lock);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
388 SDL_CloseAudio();
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
389 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
390 return(-1);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
391 }
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
392
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
393 while(!audio_configured)
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
394 SDL_Delay(100);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
395 #endif
0
74212992fb08 Initial revision
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parents:
diff changeset
396
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
397 /* If the audio driver changes the buffer size, accept it */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
398 if ( audio->spec.samples != desired->samples ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
399 desired->samples = audio->spec.samples;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
400 SDL_CalculateAudioSpec(desired);
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 /* Allocate a fake audio memory buffer */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
404 audio->fake_stream = SDL_AllocAudioMem(audio->spec.size);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
405 if ( audio->fake_stream == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
406 SDL_CloseAudio();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
407 SDL_OutOfMemory();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
408 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
409 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
410
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
411 /* See if we need to do any conversion */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
412 if ( memcmp(desired, &audio->spec, sizeof(audio->spec)) == 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
413 /* Just copy over the desired audio specification */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
414 if ( obtained != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
415 memcpy(obtained, &audio->spec, sizeof(audio->spec));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
416 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
417 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
418 /* Copy over the audio specification if possible */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
419 if ( obtained != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
420 memcpy(obtained, &audio->spec, sizeof(audio->spec));
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 /* Build an audio conversion block */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
423 if ( SDL_BuildAudioCVT(&audio->convert,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
424 desired->format, desired->channels,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
425 desired->freq,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
426 audio->spec.format, audio->spec.channels,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
427 audio->spec.freq) < 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
428 SDL_CloseAudio();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
429 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
430 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
431 if ( audio->convert.needed ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
432 audio->convert.len = desired->size;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
433 audio->convert.buf =(Uint8 *)SDL_AllocAudioMem(
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
434 audio->convert.len*audio->convert.len_mult);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
435 if ( audio->convert.buf == NULL ) {
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 SDL_OutOfMemory();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
438 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
439 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
440 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
441 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
442 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
443
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
444 #ifndef ENABLE_AHI
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
445 /* Start the audio thread if necessary */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
446 switch (audio->opened) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
447 case 1:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
448 /* Start the audio thread */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
449 audio->thread = SDL_CreateThread(SDL_RunAudio, audio);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
450 if ( audio->thread == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
451 SDL_CloseAudio();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
452 SDL_SetError("Couldn't create audio thread");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
453 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
454 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
455 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
456
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
457 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
458 /* The audio is now playing */
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 }
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
461 #else
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
462 SDL_mutexV(audio->mixer_lock);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
463 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
464
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
465 #endif
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
466
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
467 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
468 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
469
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
470 SDL_audiostatus SDL_GetAudioStatus(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
471 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
472 SDL_AudioDevice *audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
473 SDL_audiostatus status;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
474
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
475 status = SDL_AUDIO_STOPPED;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
476 if ( audio && audio->enabled ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
477 if ( audio->paused ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
478 status = SDL_AUDIO_PAUSED;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
479 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
480 status = SDL_AUDIO_PLAYING;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
481 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
482 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
483 return(status);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
484 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
485
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
486 void SDL_PauseAudio (int pause_on)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
487 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
488 SDL_AudioDevice *audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
489
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
490 if ( audio ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
491 audio->paused = pause_on;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
492 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
493 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
494
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
495 void SDL_LockAudio (void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
496 {
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parents:
diff changeset
497 SDL_AudioDevice *audio = current_audio;
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parents:
diff changeset
498
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
499 /* Obtain a lock on the mixing buffers */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
500 if ( audio ) {
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parents:
diff changeset
501 if ( audio->thread && (SDL_ThreadID() == audio->threadid) ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
502 return;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
503 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
504 SDL_mutexP(audio->mixer_lock);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
505 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
506 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
507
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
508 void SDL_UnlockAudio (void)
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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 SDL_AudioDevice *audio = current_audio;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
511
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
512 /* Release lock on the mixing buffers */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
513 if ( audio ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
514 if ( audio->thread && (SDL_ThreadID() == audio->threadid) ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
515 return;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
516 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
517 SDL_mutexV(audio->mixer_lock);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
518 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
519 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
520
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
521 void SDL_CloseAudio (void)
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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 SDL_QuitSubSystem(SDL_INIT_AUDIO);
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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
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
526 void SDL_AudioQuit(void)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
527 {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
528 SDL_AudioDevice *audio = current_audio;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
529
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
530 if ( audio ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
531 audio->enabled = 0;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
532 if ( audio->thread != NULL ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
533 SDL_WaitThread(audio->thread, NULL);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
534 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
535 if ( audio->mixer_lock != NULL ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
536 SDL_DestroyMutex(audio->mixer_lock);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
537 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
538 if ( audio->fake_stream != NULL ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
539 SDL_FreeAudioMem(audio->fake_stream);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
540 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
541 if ( audio->convert.needed ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
542 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
543
0
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
544 }
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
545 #ifndef ENABLE_AHI
0
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
546 if ( audio->opened ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
547 audio->CloseAudio(audio);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
548 audio->opened = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
549 }
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
550 #endif
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
551 /* Free the driver data */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
552 audio->free(audio);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
553 current_audio = NULL;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
554 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
555 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
556
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
557 #define NUM_FORMATS 6
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
558 static int format_idx;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
559 static int format_idx_sub;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
560 static Uint16 format_list[NUM_FORMATS][NUM_FORMATS] = {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
561 { AUDIO_U8, AUDIO_S8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
562 { AUDIO_S8, AUDIO_U8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
563 { AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_U8, AUDIO_S8 },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
564 { AUDIO_S16MSB, AUDIO_S16LSB, AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_U8, AUDIO_S8 },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
565 { AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U8, AUDIO_S8 },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
566 { AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_S16MSB, AUDIO_S16LSB, AUDIO_U8, AUDIO_S8 },
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 Uint16 SDL_FirstAudioFormat(Uint16 format)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
570 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
571 for ( format_idx=0; format_idx < NUM_FORMATS; ++format_idx ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
572 if ( format_list[format_idx][0] == format ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
573 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
574 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
575 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
576 format_idx_sub = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
577 return(SDL_NextAudioFormat());
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 Uint16 SDL_NextAudioFormat(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 if ( (format_idx == NUM_FORMATS) || (format_idx_sub == NUM_FORMATS) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
583 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
584 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
585 return(format_list[format_idx][format_idx_sub++]);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
586 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
587
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
588 void SDL_CalculateAudioSpec(SDL_AudioSpec *spec)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
589 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
590 switch (spec->format) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
591 case AUDIO_U8:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
592 spec->silence = 0x80;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
593 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
594 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
595 spec->silence = 0x00;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
596 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
597 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
598 spec->size = (spec->format&0xFF)/8;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
599 spec->size *= spec->channels;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
600 spec->size *= spec->samples;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
601 }