annotate src/audio/SDL_audio.c @ 3884:dba874934f0c SDL-1.2

Fix for buffer overflow in audio code, when feeding a device that needs resampling. Fixes Bugzilla #298.
author Ryan C. Gordon <icculus@icculus.org>
date Fri, 27 Oct 2006 20:18:24 +0000
parents c1b6bb5205f1
children 6d2e1961661a
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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 Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 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 Lesser 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 Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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 #include "SDL_config.h"
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23
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24 /* Allow access to a raw mixing buffer */
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25
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26 #include "SDL.h"
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27 #include "SDL_audio_c.h"
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28 #include "SDL_audiomem.h"
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29 #include "SDL_sysaudio.h"
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30
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31 #ifdef __OS2__
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32 /* We'll need the DosSetPriority() API! */
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33 #define INCL_DOSPROCESS
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34 #include <os2.h>
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35 #endif
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36
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37 /* Available audio drivers */
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38 static AudioBootStrap *bootstrap[] = {
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39 #if SDL_AUDIO_DRIVER_BSD
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40 &BSD_AUDIO_bootstrap,
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41 #endif
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42 #if SDL_AUDIO_DRIVER_OSS
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43 &DSP_bootstrap,
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44 &DMA_bootstrap,
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45 #endif
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46 #if SDL_AUDIO_DRIVER_ALSA
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47 &ALSA_bootstrap,
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48 #endif
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49 #if SDL_AUDIO_DRIVER_QNXNTO
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50 &QNXNTOAUDIO_bootstrap,
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51 #endif
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52 #if SDL_AUDIO_DRIVER_SUNAUDIO
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53 &SUNAUDIO_bootstrap,
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54 #endif
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55 #if SDL_AUDIO_DRIVER_DMEDIA
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56 &DMEDIA_bootstrap,
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57 #endif
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58 #if SDL_AUDIO_DRIVER_ARTS
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59 &ARTS_bootstrap,
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60 #endif
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61 #if SDL_AUDIO_DRIVER_ESD
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62 &ESD_bootstrap,
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63 #endif
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64 #if SDL_AUDIO_DRIVER_NAS
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65 &NAS_bootstrap,
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66 #endif
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67 #if SDL_AUDIO_DRIVER_DSOUND
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68 &DSOUND_bootstrap,
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69 #endif
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70 #if SDL_AUDIO_DRIVER_WAVEOUT
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71 &WAVEOUT_bootstrap,
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72 #endif
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73 #if SDL_AUDIO_DRIVER_PAUD
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74 &Paud_bootstrap,
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75 #endif
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76 #if SDL_AUDIO_DRIVER_BAUDIO
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77 &BAUDIO_bootstrap,
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78 #endif
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79 #if SDL_AUDIO_DRIVER_COREAUDIO
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80 &COREAUDIO_bootstrap,
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81 #endif
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82 #if SDL_AUDIO_DRIVER_SNDMGR
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83 &SNDMGR_bootstrap,
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84 #endif
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85 #if SDL_AUDIO_DRIVER_AHI
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86 &AHI_bootstrap,
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87 #endif
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88 #if SDL_AUDIO_DRIVER_MINT
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89 &MINTAUDIO_GSXB_bootstrap,
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90 &MINTAUDIO_MCSN_bootstrap,
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91 &MINTAUDIO_STFA_bootstrap,
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92 &MINTAUDIO_XBIOS_bootstrap,
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93 &MINTAUDIO_DMA8_bootstrap,
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94 #endif
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95 #if SDL_AUDIO_DRIVER_DISK
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96 &DISKAUD_bootstrap,
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97 #endif
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98 #if SDL_AUDIO_DRIVER_DUMMY
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99 &DUMMYAUD_bootstrap,
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100 #endif
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101 #if SDL_AUDIO_DRIVER_DC
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102 &DCAUD_bootstrap,
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103 #endif
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104 #if SDL_AUDIO_DRIVER_MMEAUDIO
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105 &MMEAUDIO_bootstrap,
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106 #endif
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107 #if SDL_AUDIO_DRIVER_DART
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108 &DART_bootstrap,
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109 #endif
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110 NULL
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111 };
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112 SDL_AudioDevice *current_audio = NULL;
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113
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114 /* Various local functions */
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115 int SDL_AudioInit(const char *driver_name);
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116 void SDL_AudioQuit(void);
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117
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118 #if SDL_AUDIO_DRIVER_AHI
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119 static int audio_configured = 0;
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120 #endif
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121
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122 /* The general mixing thread function */
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123 int SDLCALL SDL_RunAudio(void *audiop)
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124 {
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125 SDL_AudioDevice *audio = (SDL_AudioDevice *)audiop;
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126 Uint8 *stream;
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127 int stream_len;
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128 void *udata;
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129 void (SDLCALL *fill)(void *userdata,Uint8 *stream, int len);
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130 int silence;
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131 #if SDL_AUDIO_DRIVER_AHI
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132 int started = 0;
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133
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134 /* AmigaOS NEEDS that the audio driver is opened in the thread that uses it! */
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135
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136 D(bug("Task audio started audio struct:<%lx>...\n",audiop));
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137
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138 D(bug("Before Openaudio..."));
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139 if(audio->OpenAudio(audio, &audio->spec)==-1)
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140 {
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141 D(bug("Open audio failed...\n"));
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142 return(-1);
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143 }
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144 D(bug("OpenAudio...OK\n"));
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diff changeset
145 #endif
0
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diff changeset
146
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diff changeset
147 /* Perform any thread setup */
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parents:
diff changeset
148 if ( audio->ThreadInit ) {
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149 audio->ThreadInit(audio);
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150 }
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151 audio->threadid = SDL_ThreadID();
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152
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153 /* Set up the mixing function */
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diff changeset
154 fill = audio->spec.callback;
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155 udata = audio->spec.userdata;
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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parents: 0
diff changeset
156
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diff changeset
157 #if SDL_AUDIO_DRIVER_AHI
21
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diff changeset
158 audio_configured = 1;
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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diff changeset
159
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
160 D(bug("Audio configured... Checking for conversion\n"));
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
161 SDL_mutexP(audio->mixer_lock);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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parents: 0
diff changeset
162 D(bug("Semaphore obtained...\n"));
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
163 #endif
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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parents: 0
diff changeset
164
0
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165 if ( audio->convert.needed ) {
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parents:
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166 if ( audio->convert.src_format == AUDIO_U8 ) {
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parents:
diff changeset
167 silence = 0x80;
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parents:
diff changeset
168 } else {
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diff changeset
169 silence = 0;
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parents:
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170 }
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171 stream_len = audio->convert.len;
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parents:
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172 } else {
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diff changeset
173 silence = audio->spec.silence;
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diff changeset
174 stream_len = audio->spec.size;
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175 }
1561
c724c4a99759 Try to fill the hardware audio buffer immediately.
Ryan C. Gordon <icculus@icculus.org>
parents: 1532
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176
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Sam Lantinga <slouken@libsdl.org>
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177 #if SDL_AUDIO_DRIVER_AHI
21
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parents: 0
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178 SDL_mutexV(audio->mixer_lock);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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parents: 0
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179 D(bug("Entering audio loop...\n"));
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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parents: 0
diff changeset
180 #endif
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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diff changeset
181
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182 #ifdef __OS2__
1487
dc6b59e925a2 Cleaning up warnings on MacOS X
Sam Lantinga <slouken@libsdl.org>
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183 /* Increase the priority of this thread to make sure that
dc6b59e925a2 Cleaning up warnings on MacOS X
Sam Lantinga <slouken@libsdl.org>
parents: 1442
diff changeset
184 the audio will be continuous all the time! */
1190
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diff changeset
185 #ifdef USE_DOSSETPRIORITY
1442
e3242177fe4a Updated OS/2 build, yay!
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parents: 1408
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186 if (SDL_getenv("SDL_USE_TIMECRITICAL_AUDIO"))
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
parents: 1408
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187 {
1190
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diff changeset
188 #ifdef DEBUG_BUILD
1442
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
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189 printf("[SDL_RunAudio] : Setting priority to TimeCritical+0! (TID%d)\n", SDL_ThreadID());
1190
173c063d4f55 OS/2 port!
Ryan C. Gordon <icculus@icculus.org>
parents: 955
diff changeset
190 #endif
1442
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
parents: 1408
diff changeset
191 DosSetPriority(PRTYS_THREAD, PRTYC_TIMECRITICAL, 0, 0);
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
parents: 1408
diff changeset
192 }
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
parents: 1408
diff changeset
193 else
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
parents: 1408
diff changeset
194 {
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
parents: 1408
diff changeset
195 #ifdef DEBUG_BUILD
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
parents: 1408
diff changeset
196 printf("[SDL_RunAudio] : Setting priority to ForegroundServer+0! (TID%d)\n", SDL_ThreadID());
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
parents: 1408
diff changeset
197 #endif
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
parents: 1408
diff changeset
198 DosSetPriority(PRTYS_THREAD, PRTYC_FOREGROUNDSERVER, 0, 0);
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
parents: 1408
diff changeset
199 }
1190
173c063d4f55 OS/2 port!
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diff changeset
200 #endif
173c063d4f55 OS/2 port!
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
201 #endif
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
202
0
74212992fb08 Initial revision
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parents:
diff changeset
203 /* Loop, filling the audio buffers */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
204 while ( audio->enabled ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
205
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parents:
diff changeset
206 /* Fill the current buffer with sound */
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parents:
diff changeset
207 if ( audio->convert.needed ) {
74212992fb08 Initial revision
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parents:
diff changeset
208 if ( audio->convert.buf ) {
74212992fb08 Initial revision
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parents:
diff changeset
209 stream = audio->convert.buf;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
210 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
211 continue;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
212 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
213 } else {
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parents:
diff changeset
214 stream = audio->GetAudioBuf(audio);
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parents:
diff changeset
215 if ( stream == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
216 stream = audio->fake_stream;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
217 }
74212992fb08 Initial revision
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parents:
diff changeset
218 }
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1330
diff changeset
219 SDL_memset(stream, silence, stream_len);
0
74212992fb08 Initial revision
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parents:
diff changeset
220
74212992fb08 Initial revision
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parents:
diff changeset
221 if ( ! audio->paused ) {
74212992fb08 Initial revision
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parents:
diff changeset
222 SDL_mutexP(audio->mixer_lock);
74212992fb08 Initial revision
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parents:
diff changeset
223 (*fill)(udata, stream, stream_len);
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parents:
diff changeset
224 SDL_mutexV(audio->mixer_lock);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
225 }
74212992fb08 Initial revision
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parents:
diff changeset
226
74212992fb08 Initial revision
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parents:
diff changeset
227 /* Convert the audio if necessary */
74212992fb08 Initial revision
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parents:
diff changeset
228 if ( audio->convert.needed ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
229 SDL_ConvertAudio(&audio->convert);
74212992fb08 Initial revision
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parents:
diff changeset
230 stream = audio->GetAudioBuf(audio);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
231 if ( stream == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
232 stream = audio->fake_stream;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
233 }
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1330
diff changeset
234 SDL_memcpy(stream, audio->convert.buf,
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
235 audio->convert.len_cvt);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
236 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
237
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
238 /* Ready current buffer for play and change current buffer */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
239 if ( stream != audio->fake_stream ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
240 audio->PlayAudio(audio);
1562
1d487a3fab41 Fixed bug #18
Sam Lantinga <slouken@libsdl.org>
parents: 1561
diff changeset
241 }
1d487a3fab41 Fixed bug #18
Sam Lantinga <slouken@libsdl.org>
parents: 1561
diff changeset
242
1d487a3fab41 Fixed bug #18
Sam Lantinga <slouken@libsdl.org>
parents: 1561
diff changeset
243 /* Wait for an audio buffer to become available */
1d487a3fab41 Fixed bug #18
Sam Lantinga <slouken@libsdl.org>
parents: 1561
diff changeset
244 if ( stream == audio->fake_stream ) {
1d487a3fab41 Fixed bug #18
Sam Lantinga <slouken@libsdl.org>
parents: 1561
diff changeset
245 SDL_Delay((audio->spec.samples*1000)/audio->spec.freq);
1d487a3fab41 Fixed bug #18
Sam Lantinga <slouken@libsdl.org>
parents: 1561
diff changeset
246 } else {
1d487a3fab41 Fixed bug #18
Sam Lantinga <slouken@libsdl.org>
parents: 1561
diff changeset
247 audio->WaitAudio(audio);
0
74212992fb08 Initial revision
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parents:
diff changeset
248 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
249 }
1562
1d487a3fab41 Fixed bug #18
Sam Lantinga <slouken@libsdl.org>
parents: 1561
diff changeset
250
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
251 /* Wait for the audio to drain.. */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
252 if ( audio->WaitDone ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
253 audio->WaitDone(audio);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
254 }
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
255
1402
d910939febfa Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents: 1379
diff changeset
256 #if SDL_AUDIO_DRIVER_AHI
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
257 D(bug("WaitAudio...Done\n"));
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
258
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
259 audio->CloseAudio(audio);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
260
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
261 D(bug("CloseAudio..Done, subtask exiting...\n"));
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
262 audio_configured = 0;
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
263 #endif
1190
173c063d4f55 OS/2 port!
Ryan C. Gordon <icculus@icculus.org>
parents: 955
diff changeset
264 #ifdef __OS2__
173c063d4f55 OS/2 port!
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parents: 955
diff changeset
265 #ifdef DEBUG_BUILD
173c063d4f55 OS/2 port!
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parents: 955
diff changeset
266 printf("[SDL_RunAudio] : Task exiting. (TID%d)\n", SDL_ThreadID());
173c063d4f55 OS/2 port!
Ryan C. Gordon <icculus@icculus.org>
parents: 955
diff changeset
267 #endif
173c063d4f55 OS/2 port!
Ryan C. Gordon <icculus@icculus.org>
parents: 955
diff changeset
268 #endif
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
269 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
270 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
271
322
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
272 static void SDL_LockAudio_Default(SDL_AudioDevice *audio)
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
273 {
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
274 if ( audio->thread && (SDL_ThreadID() == audio->threadid) ) {
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
275 return;
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
276 }
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
277 SDL_mutexP(audio->mixer_lock);
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
278 }
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
279
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
280 static void SDL_UnlockAudio_Default(SDL_AudioDevice *audio)
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
281 {
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
282 if ( audio->thread && (SDL_ThreadID() == audio->threadid) ) {
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
283 return;
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
284 }
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
285 SDL_mutexV(audio->mixer_lock);
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
286 }
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
287
1794
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
288 static Uint16 SDL_ParseAudioFormat(const char *string)
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
289 {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
290 Uint16 format = 0;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
291
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
292 switch (*string) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
293 case 'U':
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
294 ++string;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
295 format |= 0x0000;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
296 break;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
297 case 'S':
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
298 ++string;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
299 format |= 0x8000;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
300 break;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
301 default:
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
302 return 0;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
303 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
304 switch (SDL_atoi(string)) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
305 case 8:
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
306 string += 1;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
307 format |= 8;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
308 break;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
309 case 16:
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
310 string += 2;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
311 format |= 16;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
312 if ( SDL_strcmp(string, "LSB") == 0
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
313 #if SDL_BYTEORDER == SDL_LIL_ENDIAN
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
314 || SDL_strcmp(string, "SYS") == 0
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
315 #endif
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
316 ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
317 format |= 0x0000;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
318 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
319 if ( SDL_strcmp(string, "MSB") == 0
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
320 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
321 || SDL_strcmp(string, "SYS") == 0
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
322 #endif
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
323 ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
324 format |= 0x1000;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
325 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
326 break;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
327 default:
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
328 return 0;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
329 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
330 return format;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
331 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
332
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
333 int SDL_AudioInit(const char *driver_name)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
334 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
335 SDL_AudioDevice *audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
336 int i = 0, idx;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
337
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
338 /* Check to make sure we don't overwrite 'current_audio' */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
339 if ( current_audio != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
340 SDL_AudioQuit();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
341 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
342
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
343 /* Select the proper audio driver */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
344 audio = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
345 idx = 0;
1361
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
346 #if SDL_AUDIO_DRIVER_ESD
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1330
diff changeset
347 if ( (driver_name == NULL) && (SDL_getenv("ESPEAKER") != NULL) ) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
348 /* Ahem, we know that if ESPEAKER is set, user probably wants
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
349 to use ESD, but don't start it if it's not already running.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
350 This probably isn't the place to do this, but... Shh! :)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
351 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
352 for ( i=0; bootstrap[i]; ++i ) {
3881
c1b6bb5205f1 1.2 backport: Replaced strncmp for SDL_AUDIODRIVER test with strcasecmp.
Ryan C. Gordon <icculus@icculus.org>
parents: 1794
diff changeset
353 if ( SDL_strcasecmp(bootstrap[i]->name, "esd") == 0 ) {
1341
d02b552e5304 Configure dynamically generates SDL_config.h
Sam Lantinga <slouken@libsdl.org>
parents: 1336
diff changeset
354 #ifdef HAVE_PUTENV
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
355 const char *esd_no_spawn;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
356
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
357 /* Don't start ESD if it's not running */
1341
d02b552e5304 Configure dynamically generates SDL_config.h
Sam Lantinga <slouken@libsdl.org>
parents: 1336
diff changeset
358 esd_no_spawn = getenv("ESD_NO_SPAWN");
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
359 if ( esd_no_spawn == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
360 putenv("ESD_NO_SPAWN=1");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
361 }
1341
d02b552e5304 Configure dynamically generates SDL_config.h
Sam Lantinga <slouken@libsdl.org>
parents: 1336
diff changeset
362 #endif
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
363 if ( bootstrap[i]->available() ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
364 audio = bootstrap[i]->create(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
365 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
366 }
1341
d02b552e5304 Configure dynamically generates SDL_config.h
Sam Lantinga <slouken@libsdl.org>
parents: 1336
diff changeset
367 #ifdef HAVE_UNSETENV
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
368 if ( esd_no_spawn == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
369 unsetenv("ESD_NO_SPAWN");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
370 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
371 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
372 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
373 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
374 }
1361
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
375 #endif /* SDL_AUDIO_DRIVER_ESD */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
376 if ( audio == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
377 if ( driver_name != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
378 #if 0 /* This will be replaced with a better driver selection API */
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1330
diff changeset
379 if ( SDL_strrchr(driver_name, ':') != NULL ) {
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1330
diff changeset
380 idx = atoi(SDL_strrchr(driver_name, ':')+1);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
381 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
382 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
383 for ( i=0; bootstrap[i]; ++i ) {
3881
c1b6bb5205f1 1.2 backport: Replaced strncmp for SDL_AUDIODRIVER test with strcasecmp.
Ryan C. Gordon <icculus@icculus.org>
parents: 1794
diff changeset
384 if (SDL_strcasecmp(bootstrap[i]->name, driver_name) == 0) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
385 if ( bootstrap[i]->available() ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
386 audio=bootstrap[i]->create(idx);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
387 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
388 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
389 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
390 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
391 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
392 for ( i=0; bootstrap[i]; ++i ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
393 if ( bootstrap[i]->available() ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
394 audio = bootstrap[i]->create(idx);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
395 if ( audio != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
396 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
397 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
398 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
399 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
400 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
401 if ( audio == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
402 SDL_SetError("No available audio device");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403 #if 0 /* Don't fail SDL_Init() if audio isn't available.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
404 SDL_OpenAudio() will handle it at that point. *sigh*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
405 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
406 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
407 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
408 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
409 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
410 current_audio = audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
411 if ( current_audio ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
412 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
413 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
414 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
415 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
416 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
417 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
418 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
419 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
420
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
421 char *SDL_AudioDriverName(char *namebuf, int maxlen)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
422 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
423 if ( current_audio != NULL ) {
1379
c0a74f199ecf Use only safe string functions
Sam Lantinga <slouken@libsdl.org>
parents: 1361
diff changeset
424 SDL_strlcpy(namebuf, current_audio->name, maxlen);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
425 return(namebuf);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
426 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
427 return(NULL);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
428 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
429
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
430 int SDL_OpenAudio(SDL_AudioSpec *desired, SDL_AudioSpec *obtained)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
431 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
432 SDL_AudioDevice *audio;
1794
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
433 const char *env;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
434
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
435 /* Start up the audio driver, if necessary */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
436 if ( ! current_audio ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
437 if ( (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) ||
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
438 (current_audio == NULL) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
439 return(-1);
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 audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
443
262
ba5363e21df8 Don't allow multiple audio opens to succeed (until SDL 1.3)
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
444 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
445 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
446 return(-1);
ba5363e21df8 Don't allow multiple audio opens to succeed (until SDL 1.3)
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
447 }
ba5363e21df8 Don't allow multiple audio opens to succeed (until SDL 1.3)
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
448
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
449 /* Verify some parameters */
1794
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
450 if ( desired->freq == 0 ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
451 env = SDL_getenv("SDL_AUDIO_FREQUENCY");
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
452 if ( env ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
453 desired->freq = SDL_atoi(env);
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
454 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
455 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
456 if ( desired->freq == 0 ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
457 /* Pick some default audio frequency */
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
458 desired->freq = 22050;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
459 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
460 if ( desired->format == 0 ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
461 env = SDL_getenv("SDL_AUDIO_FORMAT");
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
462 if ( env ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
463 desired->format = SDL_ParseAudioFormat(env);
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
464 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
465 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
466 if ( desired->format == 0 ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
467 /* Pick some default audio format */
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
468 desired->format = AUDIO_S16;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
469 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
470 if ( desired->channels == 0 ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
471 env = SDL_getenv("SDL_AUDIO_CHANNELS");
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
472 if ( env ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
473 desired->channels = SDL_atoi(env);
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
474 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
475 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
476 if ( desired->channels == 0 ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
477 /* Pick a default number of channels */
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
478 desired->channels = 2;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
479 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
480 switch ( desired->channels ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
481 case 1: /* Mono */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
482 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
483 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
484 case 6: /* surround with center and lfe */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
485 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
486 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
487 SDL_SetError("1 (mono) and 2 (stereo) channels supported");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
488 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
489 }
1794
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
490 if ( desired->samples == 0 ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
491 env = SDL_getenv("SDL_AUDIO_SAMPLES");
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
492 if ( env ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
493 desired->samples = SDL_atoi(env);
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
494 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
495 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
496 if ( desired->samples == 0 ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
497 /* Pick a default of ~46 ms at desired frequency */
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
498 int samples = (desired->freq / 1000) * 46;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
499 int power2 = 1;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
500 while ( power2 < samples ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
501 power2 *= 2;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
502 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
503 desired->samples = power2;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
504 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
505 if ( desired->callback == NULL ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
506 SDL_SetError("SDL_OpenAudio() passed a NULL callback");
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
507 return(-1);
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
508 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
509
1402
d910939febfa Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents: 1379
diff changeset
510 #if defined(__MACOS__) || (defined(__RISCOS__) && SDL_THREADS_DISABLED)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
511 /* FIXME: Need to implement PPC interrupt asm for SDL_LockAudio() */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
512 #else
1361
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
513 #if defined(__MINT__) && SDL_THREADS_DISABLED
398
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents: 322
diff changeset
514 /* Uses interrupt driven audio, without thread */
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents: 322
diff changeset
515 #else
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
516 /* Create a semaphore for locking the sound buffers */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
517 audio->mixer_lock = SDL_CreateMutex();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
518 if ( audio->mixer_lock == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
519 SDL_SetError("Couldn't create mixer lock");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
520 SDL_CloseAudio();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
521 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
522 }
398
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents: 322
diff changeset
523 #endif /* __MINT__ */
1402
d910939febfa Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents: 1379
diff changeset
524 #endif /* __MACOS__ */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
525
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
526 /* Calculate the silence and size of the audio specification */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
527 SDL_CalculateAudioSpec(desired);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
528
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
529 /* Open the audio subsystem */
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1330
diff changeset
530 SDL_memcpy(&audio->spec, desired, sizeof(audio->spec));
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
531 audio->convert.needed = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
532 audio->enabled = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
533 audio->paused = 1;
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
534
1406
39ca9a4b22f3 *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
535 #if !SDL_AUDIO_DRIVER_AHI
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
536
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
537 /* AmigaOS opens audio inside the main loop */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
538 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
539
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
540 if ( ! audio->opened ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
541 SDL_CloseAudio();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
542 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
543 }
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
544 #else
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
545 D(bug("Locking semaphore..."));
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
546 SDL_mutexP(audio->mixer_lock);
1408
ceb5c2fec4f1 Fixed some preprocessor mangling
Sam Lantinga <slouken@libsdl.org>
parents: 1406
diff changeset
547
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
548
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
549 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
550 D(bug("Created thread...\n"));
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
551
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
552 if ( audio->thread == NULL ) {
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
553 SDL_mutexV(audio->mixer_lock);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
554 SDL_CloseAudio();
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
555 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
556 return(-1);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
557 }
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
558
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
559 while(!audio_configured)
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
560 SDL_Delay(100);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
561 #endif
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
562
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
563 /* If the audio driver changes the buffer size, accept it */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
564 if ( audio->spec.samples != desired->samples ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
565 desired->samples = audio->spec.samples;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
566 SDL_CalculateAudioSpec(desired);
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 /* Allocate a fake audio memory buffer */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
570 audio->fake_stream = SDL_AllocAudioMem(audio->spec.size);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
571 if ( audio->fake_stream == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
572 SDL_CloseAudio();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
573 SDL_OutOfMemory();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
574 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
575 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
576
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
577 /* 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
578 if ( obtained != NULL ) {
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1330
diff changeset
579 SDL_memcpy(obtained, &audio->spec, sizeof(audio->spec));
808
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
580 } else if ( desired->freq != audio->spec.freq ||
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
581 desired->format != audio->spec.format ||
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
582 desired->channels != audio->spec.channels ) {
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
583 /* Build an audio conversion block */
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
584 if ( SDL_BuildAudioCVT(&audio->convert,
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
585 desired->format, desired->channels,
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
586 desired->freq,
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
587 audio->spec.format, audio->spec.channels,
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
588 audio->spec.freq) < 0 ) {
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
589 SDL_CloseAudio();
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
590 return(-1);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
591 }
808
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
592 if ( audio->convert.needed ) {
3884
dba874934f0c Fix for buffer overflow in audio code, when feeding a device that needs
Ryan C. Gordon <icculus@icculus.org>
parents: 3881
diff changeset
593 audio->convert.len = (int) ( ((double) desired->size) /
dba874934f0c Fix for buffer overflow in audio code, when feeding a device that needs
Ryan C. Gordon <icculus@icculus.org>
parents: 3881
diff changeset
594 audio->convert.len_ratio );
808
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
595 audio->convert.buf =(Uint8 *)SDL_AllocAudioMem(
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
596 audio->convert.len*audio->convert.len_mult);
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
597 if ( audio->convert.buf == NULL ) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
598 SDL_CloseAudio();
808
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
599 SDL_OutOfMemory();
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
600 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
601 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
602 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
603 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
604
1406
39ca9a4b22f3 *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
605 #if !SDL_AUDIO_DRIVER_AHI
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
606 /* Start the audio thread if necessary */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
607 switch (audio->opened) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
608 case 1:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
609 /* Start the audio thread */
1402
d910939febfa Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents: 1379
diff changeset
610 #if (defined(__WIN32__) && !defined(_WIN32_WCE)) && !defined(HAVE_LIBC)
1330
450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
611 #undef SDL_CreateThread
450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
612 audio->thread = SDL_CreateThread(SDL_RunAudio, audio, NULL, NULL);
450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
613 #else
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
614 audio->thread = SDL_CreateThread(SDL_RunAudio, audio);
1330
450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
615 #endif
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
616 if ( audio->thread == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
617 SDL_CloseAudio();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
618 SDL_SetError("Couldn't create audio thread");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
619 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
620 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
621 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
622
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
623 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
624 /* The audio is now playing */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
625 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
626 }
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
627 #else
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
628 SDL_mutexV(audio->mixer_lock);
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
629 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
630
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
631 #endif
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
632
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
633 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
634 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
635
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
636 SDL_audiostatus SDL_GetAudioStatus(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
637 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
638 SDL_AudioDevice *audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
639 SDL_audiostatus status;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
640
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
641 status = SDL_AUDIO_STOPPED;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
642 if ( audio && audio->enabled ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
643 if ( audio->paused ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
644 status = SDL_AUDIO_PAUSED;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
645 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
646 status = SDL_AUDIO_PLAYING;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
647 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
648 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
649 return(status);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
650 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
651
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
652 void SDL_PauseAudio (int pause_on)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
653 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
654 SDL_AudioDevice *audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
655
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
656 if ( audio ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
657 audio->paused = pause_on;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
658 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
659 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
660
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
661 void SDL_LockAudio (void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
662 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
663 SDL_AudioDevice *audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
664
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
665 /* 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
666 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
667 audio->LockAudio(audio);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
668 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
669 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
670
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
671 void SDL_UnlockAudio (void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
672 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
673 SDL_AudioDevice *audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
674
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
675 /* 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
676 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
677 audio->UnlockAudio(audio);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
678 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
679 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
680
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
681 void SDL_CloseAudio (void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
682 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
683 SDL_QuitSubSystem(SDL_INIT_AUDIO);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
684 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
685
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
686 void SDL_AudioQuit(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
687 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
688 SDL_AudioDevice *audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
689
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
690 if ( audio ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
691 audio->enabled = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
692 if ( audio->thread != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
693 SDL_WaitThread(audio->thread, NULL);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
694 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
695 if ( audio->mixer_lock != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
696 SDL_DestroyMutex(audio->mixer_lock);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
697 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
698 if ( audio->fake_stream != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
699 SDL_FreeAudioMem(audio->fake_stream);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
700 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
701 if ( audio->convert.needed ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
702 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
703
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
704 }
1406
39ca9a4b22f3 *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
705 #if !SDL_AUDIO_DRIVER_AHI
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
706 if ( audio->opened ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
707 audio->CloseAudio(audio);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
708 audio->opened = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
709 }
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
710 #endif
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
711 /* Free the driver data */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
712 audio->free(audio);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
713 current_audio = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
714 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
715 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
716
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
717 #define NUM_FORMATS 6
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
718 static int format_idx;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
719 static int format_idx_sub;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
720 static Uint16 format_list[NUM_FORMATS][NUM_FORMATS] = {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
721 { AUDIO_U8, AUDIO_S8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
722 { AUDIO_S8, AUDIO_U8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
723 { AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_U8, AUDIO_S8 },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
724 { AUDIO_S16MSB, AUDIO_S16LSB, AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_U8, AUDIO_S8 },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
725 { AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U8, AUDIO_S8 },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
726 { AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_S16MSB, AUDIO_S16LSB, AUDIO_U8, AUDIO_S8 },
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
727 };
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
728
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
729 Uint16 SDL_FirstAudioFormat(Uint16 format)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
730 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
731 for ( format_idx=0; format_idx < NUM_FORMATS; ++format_idx ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
732 if ( format_list[format_idx][0] == format ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
733 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
734 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
735 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
736 format_idx_sub = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
737 return(SDL_NextAudioFormat());
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
738 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
739
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
740 Uint16 SDL_NextAudioFormat(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
741 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
742 if ( (format_idx == NUM_FORMATS) || (format_idx_sub == NUM_FORMATS) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
743 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
744 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
745 return(format_list[format_idx][format_idx_sub++]);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
746 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
747
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
748 void SDL_CalculateAudioSpec(SDL_AudioSpec *spec)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
749 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
750 switch (spec->format) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
751 case AUDIO_U8:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
752 spec->silence = 0x80;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
753 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
754 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
755 spec->silence = 0x00;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
756 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
757 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
758 spec->size = (spec->format&0xFF)/8;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
759 spec->size *= spec->channels;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
760 spec->size *= spec->samples;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
761 }