annotate src/audio/SDL_audio.c @ 4391:07b330419439 SDL-1.2

Fixed bug #849 some more: Tim Angus 2009-11-26 14:41:04 PST Fix to the cursor not being responsive when the app doesn't have SDL_APPINPUTFOCUS The problems with the directx driver are similar to the ones I introduced in the windib driver with r4478. Basically if the application did not have focus, the mouse position is not updated. It's not really that the mouse cursor was invisible, it's that it is stuck underneath another window where you can't see it. This behaviour predates my r4478 changes and is the reason I unwittingly broke the windib driver as I had been replicating the way the directx driver deals with focus. Prior to r4478 the directx driver could not be used in windowed mode, so the broken focusing would not have actually been observable. Anyway, the attached patch makes the directx driver behaves like the windib driver in terms of focus. Time for 1.2.15? ;) I've added an additional change of moving the calls to WIN_GrabInput that are made on WM_ACTIVATE messages so that they only occur when the state is SDL_APPINPUTFOCUS. When a fullscreen application is minimised using alt-tab, it still receives WM_ACTIVATE messages when other applications are selected. If WIN_GrabInput is called when the SDL application doesn't have input focus, bad things happen; it shouldn't be being called at all. I've also added a line to make sure that SDL_APPMOUSEFOCUS state is dropped when the application is minimised following an alt-tab.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 11 Dec 2009 15:24:53 +0000
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children fe15c4e8efe6
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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_PULSE
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43 &PULSE_bootstrap,
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44 #endif
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45 #if SDL_AUDIO_DRIVER_ALSA
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46 &ALSA_bootstrap,
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47 #endif
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48 #if SDL_AUDIO_DRIVER_OSS
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49 &DSP_bootstrap,
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50 &DMA_bootstrap,
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51 #endif
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52 #if SDL_AUDIO_DRIVER_QNXNTO
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53 &QNXNTOAUDIO_bootstrap,
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54 #endif
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55 #if SDL_AUDIO_DRIVER_SUNAUDIO
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56 &SUNAUDIO_bootstrap,
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57 #endif
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58 #if SDL_AUDIO_DRIVER_DMEDIA
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59 &DMEDIA_bootstrap,
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60 #endif
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61 #if SDL_AUDIO_DRIVER_ARTS
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62 &ARTS_bootstrap,
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63 #endif
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64 #if SDL_AUDIO_DRIVER_ESD
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65 &ESD_bootstrap,
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66 #endif
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67 #if SDL_AUDIO_DRIVER_NAS
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68 &NAS_bootstrap,
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69 #endif
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70 #if SDL_AUDIO_DRIVER_DSOUND
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71 &DSOUND_bootstrap,
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72 #endif
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73 #if SDL_AUDIO_DRIVER_WAVEOUT
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74 &WAVEOUT_bootstrap,
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75 #endif
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76 #if SDL_AUDIO_DRIVER_PAUD
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77 &Paud_bootstrap,
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78 #endif
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79 #if SDL_AUDIO_DRIVER_BAUDIO
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80 &BAUDIO_bootstrap,
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81 #endif
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82 #if SDL_AUDIO_DRIVER_COREAUDIO
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83 &COREAUDIO_bootstrap,
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84 #endif
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85 #if SDL_AUDIO_DRIVER_SNDMGR
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86 &SNDMGR_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_NDS
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105 &NDSAUD_bootstrap,
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106 #endif
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107 #if SDL_AUDIO_DRIVER_MMEAUDIO
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108 &MMEAUDIO_bootstrap,
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109 #endif
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110 #if SDL_AUDIO_DRIVER_DART
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111 &DART_bootstrap,
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112 #endif
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113 #if SDL_AUDIO_DRIVER_EPOCAUDIO
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114 &EPOCAudio_bootstrap,
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115 #endif
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116 NULL
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117 };
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118 SDL_AudioDevice *current_audio = NULL;
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119
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120 /* Various local functions */
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121 int SDL_AudioInit(const char *driver_name);
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122 void SDL_AudioQuit(void);
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123
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124 /* The general mixing thread function */
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125 int SDLCALL SDL_RunAudio(void *audiop)
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126 {
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127 SDL_AudioDevice *audio = (SDL_AudioDevice *)audiop;
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128 Uint8 *stream;
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129 int stream_len;
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130 void *udata;
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131 void (SDLCALL *fill)(void *userdata,Uint8 *stream, int len);
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132 int silence;
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133
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134 /* Perform any thread setup */
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135 if ( audio->ThreadInit ) {
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136 audio->ThreadInit(audio);
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137 }
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138 audio->threadid = SDL_ThreadID();
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139
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140 /* Set up the mixing function */
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parents:
diff changeset
141 fill = audio->spec.callback;
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diff changeset
142 udata = audio->spec.userdata;
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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parents: 0
diff changeset
143
0
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diff changeset
144 if ( audio->convert.needed ) {
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diff changeset
145 if ( audio->convert.src_format == AUDIO_U8 ) {
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parents:
diff changeset
146 silence = 0x80;
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parents:
diff changeset
147 } else {
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diff changeset
148 silence = 0;
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parents:
diff changeset
149 }
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diff changeset
150 stream_len = audio->convert.len;
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parents:
diff changeset
151 } else {
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diff changeset
152 silence = audio->spec.silence;
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diff changeset
153 stream_len = audio->spec.size;
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diff changeset
154 }
1561
c724c4a99759 Try to fill the hardware audio buffer immediately.
Ryan C. Gordon <icculus@icculus.org>
parents: 1532
diff changeset
155
1190
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diff changeset
156 #ifdef __OS2__
1487
dc6b59e925a2 Cleaning up warnings on MacOS X
Sam Lantinga <slouken@libsdl.org>
parents: 1442
diff changeset
157 /* Increase the priority of this thread to make sure that
dc6b59e925a2 Cleaning up warnings on MacOS X
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parents: 1442
diff changeset
158 the audio will be continuous all the time! */
1190
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diff changeset
159 #ifdef USE_DOSSETPRIORITY
1442
e3242177fe4a Updated OS/2 build, yay!
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diff changeset
160 if (SDL_getenv("SDL_USE_TIMECRITICAL_AUDIO"))
e3242177fe4a Updated OS/2 build, yay!
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parents: 1408
diff changeset
161 {
1190
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diff changeset
162 #ifdef DEBUG_BUILD
1442
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
163 printf("[SDL_RunAudio] : Setting priority to TimeCritical+0! (TID%d)\n", SDL_ThreadID());
1190
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parents: 955
diff changeset
164 #endif
1442
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
parents: 1408
diff changeset
165 DosSetPriority(PRTYS_THREAD, PRTYC_TIMECRITICAL, 0, 0);
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
parents: 1408
diff changeset
166 }
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
parents: 1408
diff changeset
167 else
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
parents: 1408
diff changeset
168 {
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
parents: 1408
diff changeset
169 #ifdef DEBUG_BUILD
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
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diff changeset
170 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
171 #endif
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
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diff changeset
172 DosSetPriority(PRTYS_THREAD, PRTYC_FOREGROUNDSERVER, 0, 0);
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
parents: 1408
diff changeset
173 }
1190
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diff changeset
174 #endif
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diff changeset
175 #endif
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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diff changeset
176
0
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177 /* Loop, filling the audio buffers */
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parents:
diff changeset
178 while ( audio->enabled ) {
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parents:
diff changeset
179
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parents:
diff changeset
180 /* Fill the current buffer with sound */
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parents:
diff changeset
181 if ( audio->convert.needed ) {
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parents:
diff changeset
182 if ( audio->convert.buf ) {
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diff changeset
183 stream = audio->convert.buf;
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parents:
diff changeset
184 } else {
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parents:
diff changeset
185 continue;
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parents:
diff changeset
186 }
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parents:
diff changeset
187 } else {
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diff changeset
188 stream = audio->GetAudioBuf(audio);
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parents:
diff changeset
189 if ( stream == NULL ) {
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parents:
diff changeset
190 stream = audio->fake_stream;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
191 }
74212992fb08 Initial revision
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parents:
diff changeset
192 }
4001
6831b8723a85 Don't initialize the audio buffer passed to the application's audio callback,
Ryan C. Gordon <icculus@icculus.org>
parents: 3976
diff changeset
193
4024
000a99b4be87 Reverted patch in revision #3139, since it changes behaviour, which isn't good
Ryan C. Gordon <icculus@icculus.org>
parents: 4001
diff changeset
194 SDL_memset(stream, silence, stream_len);
0
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parents:
diff changeset
195
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parents:
diff changeset
196 if ( ! audio->paused ) {
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parents:
diff changeset
197 SDL_mutexP(audio->mixer_lock);
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parents:
diff changeset
198 (*fill)(udata, stream, stream_len);
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parents:
diff changeset
199 SDL_mutexV(audio->mixer_lock);
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parents:
diff changeset
200 }
74212992fb08 Initial revision
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parents:
diff changeset
201
74212992fb08 Initial revision
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parents:
diff changeset
202 /* Convert the audio if necessary */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
203 if ( audio->convert.needed ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
204 SDL_ConvertAudio(&audio->convert);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
205 stream = audio->GetAudioBuf(audio);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
206 if ( stream == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
207 stream = audio->fake_stream;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
208 }
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1330
diff changeset
209 SDL_memcpy(stream, audio->convert.buf,
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
210 audio->convert.len_cvt);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
211 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
212
74212992fb08 Initial revision
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parents:
diff changeset
213 /* Ready current buffer for play and change current buffer */
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parents:
diff changeset
214 if ( stream != audio->fake_stream ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
215 audio->PlayAudio(audio);
1562
1d487a3fab41 Fixed bug #18
Sam Lantinga <slouken@libsdl.org>
parents: 1561
diff changeset
216 }
1d487a3fab41 Fixed bug #18
Sam Lantinga <slouken@libsdl.org>
parents: 1561
diff changeset
217
1d487a3fab41 Fixed bug #18
Sam Lantinga <slouken@libsdl.org>
parents: 1561
diff changeset
218 /* Wait for an audio buffer to become available */
1d487a3fab41 Fixed bug #18
Sam Lantinga <slouken@libsdl.org>
parents: 1561
diff changeset
219 if ( stream == audio->fake_stream ) {
1d487a3fab41 Fixed bug #18
Sam Lantinga <slouken@libsdl.org>
parents: 1561
diff changeset
220 SDL_Delay((audio->spec.samples*1000)/audio->spec.freq);
1d487a3fab41 Fixed bug #18
Sam Lantinga <slouken@libsdl.org>
parents: 1561
diff changeset
221 } else {
1d487a3fab41 Fixed bug #18
Sam Lantinga <slouken@libsdl.org>
parents: 1561
diff changeset
222 audio->WaitAudio(audio);
0
74212992fb08 Initial revision
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parents:
diff changeset
223 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
224 }
1562
1d487a3fab41 Fixed bug #18
Sam Lantinga <slouken@libsdl.org>
parents: 1561
diff changeset
225
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
226 /* Wait for the audio to drain.. */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
227 if ( audio->WaitDone ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
228 audio->WaitDone(audio);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
229 }
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
230
1190
173c063d4f55 OS/2 port!
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diff changeset
231 #ifdef __OS2__
173c063d4f55 OS/2 port!
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parents: 955
diff changeset
232 #ifdef DEBUG_BUILD
173c063d4f55 OS/2 port!
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diff changeset
233 printf("[SDL_RunAudio] : Task exiting. (TID%d)\n", SDL_ThreadID());
173c063d4f55 OS/2 port!
Ryan C. Gordon <icculus@icculus.org>
parents: 955
diff changeset
234 #endif
173c063d4f55 OS/2 port!
Ryan C. Gordon <icculus@icculus.org>
parents: 955
diff changeset
235 #endif
0
74212992fb08 Initial revision
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parents:
diff changeset
236 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
237 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
238
322
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
239 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
240 {
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
241 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
242 return;
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
243 }
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
244 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
245 }
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
246
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
247 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
248 {
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
249 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
250 return;
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
251 }
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
252 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
253 }
fd93a09655e3 The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
254
1794
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
255 static Uint16 SDL_ParseAudioFormat(const char *string)
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
256 {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
257 Uint16 format = 0;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
258
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
259 switch (*string) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
260 case 'U':
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
261 ++string;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
262 format |= 0x0000;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
263 break;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
264 case 'S':
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
265 ++string;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
266 format |= 0x8000;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
267 break;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
268 default:
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
269 return 0;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
270 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
271 switch (SDL_atoi(string)) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
272 case 8:
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
273 string += 1;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
274 format |= 8;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
275 break;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
276 case 16:
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
277 string += 2;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
278 format |= 16;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
279 if ( SDL_strcmp(string, "LSB") == 0
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
280 #if SDL_BYTEORDER == SDL_LIL_ENDIAN
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
281 || SDL_strcmp(string, "SYS") == 0
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
282 #endif
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
283 ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
284 format |= 0x0000;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
285 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
286 if ( SDL_strcmp(string, "MSB") == 0
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
287 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
288 || SDL_strcmp(string, "SYS") == 0
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
289 #endif
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
290 ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
291 format |= 0x1000;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
292 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
293 break;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
294 default:
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
295 return 0;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
296 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
297 return format;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
298 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
299
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
300 int SDL_AudioInit(const char *driver_name)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
301 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
302 SDL_AudioDevice *audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
303 int i = 0, idx;
74212992fb08 Initial revision
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parents:
diff changeset
304
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parents:
diff changeset
305 /* Check to make sure we don't overwrite 'current_audio' */
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parents:
diff changeset
306 if ( current_audio != NULL ) {
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parents:
diff changeset
307 SDL_AudioQuit();
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parents:
diff changeset
308 }
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parents:
diff changeset
309
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parents:
diff changeset
310 /* Select the proper audio driver */
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parents:
diff changeset
311 audio = NULL;
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parents:
diff changeset
312 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
313 #if SDL_AUDIO_DRIVER_ESD
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1330
diff changeset
314 if ( (driver_name == NULL) && (SDL_getenv("ESPEAKER") != NULL) ) {
0
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parents:
diff changeset
315 /* Ahem, we know that if ESPEAKER is set, user probably wants
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parents:
diff changeset
316 to use ESD, but don't start it if it's not already running.
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parents:
diff changeset
317 This probably isn't the place to do this, but... Shh! :)
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parents:
diff changeset
318 */
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parents:
diff changeset
319 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
320 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
321 #ifdef HAVE_PUTENV
0
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parents:
diff changeset
322 const char *esd_no_spawn;
74212992fb08 Initial revision
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parents:
diff changeset
323
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parents:
diff changeset
324 /* 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
325 esd_no_spawn = getenv("ESD_NO_SPAWN");
0
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parents:
diff changeset
326 if ( esd_no_spawn == NULL ) {
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parents:
diff changeset
327 putenv("ESD_NO_SPAWN=1");
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parents:
diff changeset
328 }
1341
d02b552e5304 Configure dynamically generates SDL_config.h
Sam Lantinga <slouken@libsdl.org>
parents: 1336
diff changeset
329 #endif
0
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parents:
diff changeset
330 if ( bootstrap[i]->available() ) {
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parents:
diff changeset
331 audio = bootstrap[i]->create(0);
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parents:
diff changeset
332 break;
74212992fb08 Initial revision
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parents:
diff changeset
333 }
1341
d02b552e5304 Configure dynamically generates SDL_config.h
Sam Lantinga <slouken@libsdl.org>
parents: 1336
diff changeset
334 #ifdef HAVE_UNSETENV
0
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parents:
diff changeset
335 if ( esd_no_spawn == NULL ) {
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parents:
diff changeset
336 unsetenv("ESD_NO_SPAWN");
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
337 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
338 #endif
74212992fb08 Initial revision
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parents:
diff changeset
339 }
74212992fb08 Initial revision
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parents:
diff changeset
340 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
341 }
1361
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
342 #endif /* SDL_AUDIO_DRIVER_ESD */
0
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parents:
diff changeset
343 if ( audio == NULL ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
344 if ( driver_name != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
345 #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
346 if ( SDL_strrchr(driver_name, ':') != NULL ) {
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1330
diff changeset
347 idx = atoi(SDL_strrchr(driver_name, ':')+1);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
348 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
349 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
350 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
351 if (SDL_strcasecmp(bootstrap[i]->name, driver_name) == 0) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
352 if ( bootstrap[i]->available() ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
353 audio=bootstrap[i]->create(idx);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
354 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
355 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
356 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
357 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
358 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
359 for ( i=0; bootstrap[i]; ++i ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
360 if ( bootstrap[i]->available() ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
361 audio = bootstrap[i]->create(idx);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
362 if ( audio != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
363 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
364 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
365 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
366 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
367 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
368 if ( audio == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
369 SDL_SetError("No available audio device");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
370 #if 0 /* Don't fail SDL_Init() if audio isn't available.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
371 SDL_OpenAudio() will handle it at that point. *sigh*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
372 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
373 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
374 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
375 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
376 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
377 current_audio = audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
378 if ( current_audio ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
379 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
380 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
381 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
382 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
383 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
384 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
385 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
386 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
387
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
388 char *SDL_AudioDriverName(char *namebuf, int maxlen)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
389 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
390 if ( current_audio != NULL ) {
1379
c0a74f199ecf Use only safe string functions
Sam Lantinga <slouken@libsdl.org>
parents: 1361
diff changeset
391 SDL_strlcpy(namebuf, current_audio->name, maxlen);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
392 return(namebuf);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
393 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
394 return(NULL);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
395 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
396
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
397 int SDL_OpenAudio(SDL_AudioSpec *desired, SDL_AudioSpec *obtained)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
398 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
399 SDL_AudioDevice *audio;
1794
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
400 const char *env;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
401
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
402 /* Start up the audio driver, if necessary */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403 if ( ! current_audio ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
404 if ( (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) ||
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
405 (current_audio == NULL) ) {
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 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
408 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
409 audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
410
262
ba5363e21df8 Don't allow multiple audio opens to succeed (until SDL 1.3)
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
411 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
412 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
413 return(-1);
ba5363e21df8 Don't allow multiple audio opens to succeed (until SDL 1.3)
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
414 }
ba5363e21df8 Don't allow multiple audio opens to succeed (until SDL 1.3)
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
415
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
416 /* Verify some parameters */
1794
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
417 if ( desired->freq == 0 ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
418 env = SDL_getenv("SDL_AUDIO_FREQUENCY");
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
419 if ( env ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
420 desired->freq = SDL_atoi(env);
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
421 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
422 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
423 if ( desired->freq == 0 ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
424 /* Pick some default audio frequency */
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
425 desired->freq = 22050;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
426 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
427 if ( desired->format == 0 ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
428 env = SDL_getenv("SDL_AUDIO_FORMAT");
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
429 if ( env ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
430 desired->format = SDL_ParseAudioFormat(env);
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
431 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
432 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
433 if ( desired->format == 0 ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
434 /* Pick some default audio format */
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
435 desired->format = AUDIO_S16;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
436 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
437 if ( desired->channels == 0 ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
438 env = SDL_getenv("SDL_AUDIO_CHANNELS");
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
439 if ( env ) {
4044
009d85e98922 Fixed VC++ warnings
Sam Lantinga <slouken@libsdl.org>
parents: 4024
diff changeset
440 desired->channels = (Uint8)SDL_atoi(env);
1794
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
441 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
442 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
443 if ( desired->channels == 0 ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
444 /* Pick a default number of channels */
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
445 desired->channels = 2;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
446 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
447 switch ( desired->channels ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
448 case 1: /* Mono */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
449 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
450 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
451 case 6: /* surround with center and lfe */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
452 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
453 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
454 SDL_SetError("1 (mono) and 2 (stereo) channels supported");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
455 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
456 }
1794
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
457 if ( desired->samples == 0 ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
458 env = SDL_getenv("SDL_AUDIO_SAMPLES");
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
459 if ( env ) {
4044
009d85e98922 Fixed VC++ warnings
Sam Lantinga <slouken@libsdl.org>
parents: 4024
diff changeset
460 desired->samples = (Uint16)SDL_atoi(env);
1794
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
461 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
462 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
463 if ( desired->samples == 0 ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
464 /* Pick a default of ~46 ms at desired frequency */
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
465 int samples = (desired->freq / 1000) * 46;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
466 int power2 = 1;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
467 while ( power2 < samples ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
468 power2 *= 2;
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 desired->samples = power2;
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
471 }
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
472 if ( desired->callback == NULL ) {
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
473 SDL_SetError("SDL_OpenAudio() passed a NULL callback");
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
474 return(-1);
5605a9820134 Fixed bug #137
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
475 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
476
3976
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
477 #if SDL_THREADS_DISABLED
398
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents: 322
diff changeset
478 /* Uses interrupt driven audio, without thread */
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents: 322
diff changeset
479 #else
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
480 /* Create a semaphore for locking the sound buffers */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
481 audio->mixer_lock = SDL_CreateMutex();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
482 if ( audio->mixer_lock == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
483 SDL_SetError("Couldn't create mixer lock");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
484 SDL_CloseAudio();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
485 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
486 }
3976
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
487 #endif /* SDL_THREADS_DISABLED */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
488
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
489 /* Calculate the silence and size of the audio specification */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
490 SDL_CalculateAudioSpec(desired);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
491
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
492 /* Open the audio subsystem */
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1330
diff changeset
493 SDL_memcpy(&audio->spec, desired, sizeof(audio->spec));
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
494 audio->convert.needed = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
495 audio->enabled = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
496 audio->paused = 1;
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
497
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
498 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
499
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
500 if ( ! audio->opened ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
501 SDL_CloseAudio();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
502 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
503 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
504
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
505 /* If the audio driver changes the buffer size, accept it */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
506 if ( audio->spec.samples != desired->samples ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
507 desired->samples = audio->spec.samples;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
508 SDL_CalculateAudioSpec(desired);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
509 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
510
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
511 /* Allocate a fake audio memory buffer */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
512 audio->fake_stream = SDL_AllocAudioMem(audio->spec.size);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
513 if ( audio->fake_stream == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
514 SDL_CloseAudio();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
515 SDL_OutOfMemory();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
516 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
517 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
518
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
519 /* 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
520 if ( obtained != NULL ) {
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1330
diff changeset
521 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
522 } else if ( desired->freq != audio->spec.freq ||
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
523 desired->format != audio->spec.format ||
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
524 desired->channels != audio->spec.channels ) {
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
525 /* Build an audio conversion block */
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
526 if ( SDL_BuildAudioCVT(&audio->convert,
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
527 desired->format, desired->channels,
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
528 desired->freq,
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
529 audio->spec.format, audio->spec.channels,
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
530 audio->spec.freq) < 0 ) {
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
531 SDL_CloseAudio();
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
532 return(-1);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
533 }
808
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
534 if ( audio->convert.needed ) {
4205
12da7861173e Use correct value when calculating audio conversion length.
Ryan C. Gordon <icculus@icculus.org>
parents: 4159
diff changeset
535 audio->convert.len = (int) ( ((double) audio->spec.size) /
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
536 audio->convert.len_ratio );
808
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
537 audio->convert.buf =(Uint8 *)SDL_AllocAudioMem(
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
538 audio->convert.len*audio->convert.len_mult);
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
539 if ( audio->convert.buf == NULL ) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
540 SDL_CloseAudio();
808
0defd90ef27c Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
541 SDL_OutOfMemory();
0
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 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
544 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
545 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
546
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
547 /* Start the audio thread if necessary */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
548 switch (audio->opened) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
549 case 1:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
550 /* Start the audio thread */
3975
e85e65aec22f Added S60 port.
Ryan C. Gordon <icculus@icculus.org>
parents: 3939
diff changeset
551 #if (defined(__WIN32__) && !defined(_WIN32_WCE)) && !defined(HAVE_LIBC) && !defined(__SYMBIAN32__)
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
552 #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
553 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
554 #else
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
555 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
556 #endif
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
557 if ( audio->thread == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
558 SDL_CloseAudio();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
559 SDL_SetError("Couldn't create audio thread");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
560 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
561 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
562 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
563
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
564 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
565 /* The audio is now playing */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
566 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
567 }
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
568
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
569 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
570 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
571
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
572 SDL_audiostatus SDL_GetAudioStatus(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
573 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
574 SDL_AudioDevice *audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
575 SDL_audiostatus status;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
576
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
577 status = SDL_AUDIO_STOPPED;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
578 if ( audio && audio->enabled ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
579 if ( audio->paused ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
580 status = SDL_AUDIO_PAUSED;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
581 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
582 status = SDL_AUDIO_PLAYING;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
583 }
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(status);
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_PauseAudio (int pause_on)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
589 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
590 SDL_AudioDevice *audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
591
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
592 if ( audio ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
593 audio->paused = pause_on;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
594 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
595 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
596
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
597 void SDL_LockAudio (void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
598 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
599 SDL_AudioDevice *audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
600
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
601 /* 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
602 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
603 audio->LockAudio(audio);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
604 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
605 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
606
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
607 void SDL_UnlockAudio (void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
608 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
609 SDL_AudioDevice *audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
610
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
611 /* 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
612 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
613 audio->UnlockAudio(audio);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
614 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
615 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
616
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
617 void SDL_CloseAudio (void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
618 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
619 SDL_QuitSubSystem(SDL_INIT_AUDIO);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
620 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
621
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
622 void SDL_AudioQuit(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
623 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
624 SDL_AudioDevice *audio = current_audio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
625
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
626 if ( audio ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
627 audio->enabled = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
628 if ( audio->thread != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
629 SDL_WaitThread(audio->thread, NULL);
74212992fb08 Initial revision
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630 }
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631 if ( audio->mixer_lock != NULL ) {
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632 SDL_DestroyMutex(audio->mixer_lock);
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633 }
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634 if ( audio->fake_stream != NULL ) {
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635 SDL_FreeAudioMem(audio->fake_stream);
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636 }
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637 if ( audio->convert.needed ) {
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638 SDL_FreeAudioMem(audio->convert.buf);
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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639
0
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640 }
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641 if ( audio->opened ) {
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642 audio->CloseAudio(audio);
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643 audio->opened = 0;
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644 }
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645 /* Free the driver data */
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646 audio->free(audio);
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647 current_audio = NULL;
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648 }
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649 }
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650
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651 #define NUM_FORMATS 6
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parents:
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652 static int format_idx;
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653 static int format_idx_sub;
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654 static Uint16 format_list[NUM_FORMATS][NUM_FORMATS] = {
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655 { AUDIO_U8, AUDIO_S8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB },
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diff changeset
656 { AUDIO_S8, AUDIO_U8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB },
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657 { AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_U8, AUDIO_S8 },
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parents:
diff changeset
658 { AUDIO_S16MSB, AUDIO_S16LSB, AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_U8, AUDIO_S8 },
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parents:
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659 { AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U8, AUDIO_S8 },
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parents:
diff changeset
660 { AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_S16MSB, AUDIO_S16LSB, AUDIO_U8, AUDIO_S8 },
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diff changeset
661 };
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parents:
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662
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663 Uint16 SDL_FirstAudioFormat(Uint16 format)
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parents:
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664 {
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parents:
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665 for ( format_idx=0; format_idx < NUM_FORMATS; ++format_idx ) {
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666 if ( format_list[format_idx][0] == format ) {
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diff changeset
667 break;
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parents:
diff changeset
668 }
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parents:
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669 }
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diff changeset
670 format_idx_sub = 0;
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671 return(SDL_NextAudioFormat());
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diff changeset
672 }
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parents:
diff changeset
673
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parents:
diff changeset
674 Uint16 SDL_NextAudioFormat(void)
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parents:
diff changeset
675 {
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diff changeset
676 if ( (format_idx == NUM_FORMATS) || (format_idx_sub == NUM_FORMATS) ) {
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parents:
diff changeset
677 return(0);
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parents:
diff changeset
678 }
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parents:
diff changeset
679 return(format_list[format_idx][format_idx_sub++]);
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parents:
diff changeset
680 }
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parents:
diff changeset
681
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diff changeset
682 void SDL_CalculateAudioSpec(SDL_AudioSpec *spec)
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parents:
diff changeset
683 {
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parents:
diff changeset
684 switch (spec->format) {
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parents:
diff changeset
685 case AUDIO_U8:
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parents:
diff changeset
686 spec->silence = 0x80;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
687 break;
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parents:
diff changeset
688 default:
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parents:
diff changeset
689 spec->silence = 0x00;
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parents:
diff changeset
690 break;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
691 }
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parents:
diff changeset
692 spec->size = (spec->format&0xFF)/8;
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parents:
diff changeset
693 spec->size *= spec->channels;
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parents:
diff changeset
694 spec->size *= spec->samples;
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parents:
diff changeset
695 }