Mercurial > sdl-ios-xcode
annotate src/audio/macosx/SDL_coreaudio.c @ 1348:40d0975c1769
Date: Mon, 6 Feb 2006 11:41:04 -0500
From: "mystml@adinet.com.uy"
Subject: [SDL] ALT-F4 using DirectX
My game isn't getting SDL_QUIT when I press ALT-F4 using the DirectX
driver; it does get SDL_QUIT when I press the red X in the window.
I tracked this down to DX5_HandleMessage() in SDL_dx5events.c;
WM_SYSKEYDOWN is being trapped and ignored which causes Windows not to post
a WM_CLOSE, hence no SDL_QUIT is being generated.
The relevant code is this :
/* The keyboard is handled via DirectInput */
case WM_SYSKEYUP:
case WM_SYSKEYDOWN:
case WM_KEYUP:
case WM_KEYDOWN: {
/* Ignore windows keyboard messages */;
}
return(0);
If I comment the WM_SYSKEYDOWN case, it falls through DefWindowProc() and
ALT-F4 starts working again.
I'm not sure about the best way to fix this. One option is handling ALT-F4
as a particular case somehow, but doesn't sound good. Another option would
be to handle WM_SYSKEYDOWN separately and breaking instead of returning 0,
so processing falls through and goes to DefWindowProc which does The Right
Thing (TM). This seems to be the minimal change that makes ALT-F4 work and
normal keyboard input continues to work.
Does this sound reasonable? Am I overlooking anything? Do I submit a patch?
--Gabriel
author | Sam Lantinga <slouken@libsdl.org> |
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date | Wed, 08 Feb 2006 17:19:43 +0000 |
parents | 604d73db6802 |
children | c71e05b4dc2e |
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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 |
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23 #include <AudioUnit/AudioUnit.h> |
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24 |
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25 #include "SDL_stdlib.h" |
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26 #include "SDL_string.h" |
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27 #include "SDL_endian.h" |
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28 #include "SDL_audio.h" |
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29 #include "SDL_audio_c.h" |
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30 #include "SDL_audiomem.h" |
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31 #include "SDL_sysaudio.h" |
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32 #include "SDL_coreaudio.h" |
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33 |
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34 |
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35 /* Audio driver functions */ |
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36 |
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37 static int Core_OpenAudio(_THIS, SDL_AudioSpec *spec); |
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38 static void Core_WaitAudio(_THIS); |
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39 static void Core_PlayAudio(_THIS); |
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40 static Uint8 *Core_GetAudioBuf(_THIS); |
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41 static void Core_CloseAudio(_THIS); |
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42 |
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43 /* Audio driver bootstrap functions */ |
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44 |
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45 static int Audio_Available(void) |
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46 { |
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47 return(1); |
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48 } |
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49 |
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50 static void Audio_DeleteDevice(SDL_AudioDevice *device) |
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51 { |
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52 SDL_free(device->hidden); |
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53 SDL_free(device); |
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54 } |
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55 |
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56 static SDL_AudioDevice *Audio_CreateDevice(int devindex) |
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57 { |
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58 SDL_AudioDevice *this; |
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59 |
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60 /* Initialize all variables that we clean on shutdown */ |
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61 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
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62 if ( this ) { |
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63 SDL_memset(this, 0, (sizeof *this)); |
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64 this->hidden = (struct SDL_PrivateAudioData *) |
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65 SDL_malloc((sizeof *this->hidden)); |
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66 } |
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67 if ( (this == NULL) || (this->hidden == NULL) ) { |
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68 SDL_OutOfMemory(); |
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69 if ( this ) { |
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70 SDL_free(this); |
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71 } |
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72 return(0); |
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73 } |
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74 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
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75 |
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76 /* Set the function pointers */ |
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77 this->OpenAudio = Core_OpenAudio; |
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78 this->WaitAudio = Core_WaitAudio; |
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79 this->PlayAudio = Core_PlayAudio; |
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80 this->GetAudioBuf = Core_GetAudioBuf; |
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81 this->CloseAudio = Core_CloseAudio; |
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82 |
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83 this->free = Audio_DeleteDevice; |
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84 |
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85 return this; |
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86 } |
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87 |
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88 AudioBootStrap COREAUDIO_bootstrap = { |
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89 "coreaudio", "Mac OS X CoreAudio", |
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90 Audio_Available, Audio_CreateDevice |
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91 }; |
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92 |
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93 /* The CoreAudio callback */ |
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94 static OSStatus audioCallback (void *inRefCon, |
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95 AudioUnitRenderActionFlags inActionFlags, |
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96 const AudioTimeStamp *inTimeStamp, |
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97 UInt32 inBusNumber, |
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98 AudioBuffer *ioData) |
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99 { |
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100 SDL_AudioDevice *this = (SDL_AudioDevice *)inRefCon; |
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101 UInt32 remaining, len; |
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102 void *ptr; |
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103 |
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104 /* Only do anything if audio is enabled and not paused */ |
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105 if ( ! this->enabled || this->paused ) { |
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106 SDL_memset(ioData->mData, this->spec.silence, ioData->mDataByteSize); |
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107 return 0; |
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108 } |
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109 |
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110 /* No SDL conversion should be needed here, ever, since we accept |
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111 any input format in OpenAudio, and leave the conversion to CoreAudio. |
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112 */ |
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113 /* |
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114 assert(!this->convert.needed); |
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115 assert(this->spec.channels == ioData->mNumberChannels); |
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116 */ |
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117 |
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118 remaining = ioData->mDataByteSize; |
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119 ptr = ioData->mData; |
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120 while (remaining > 0) { |
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121 if (bufferOffset >= bufferSize) { |
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122 /* Generate the data */ |
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123 SDL_memset(buffer, this->spec.silence, bufferSize); |
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124 SDL_mutexP(this->mixer_lock); |
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125 (*this->spec.callback)(this->spec.userdata, |
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126 buffer, bufferSize); |
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127 SDL_mutexV(this->mixer_lock); |
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128 bufferOffset = 0; |
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129 } |
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130 |
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131 len = bufferSize - bufferOffset; |
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132 if (len > remaining) |
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133 len = remaining; |
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134 SDL_memcpy(ptr, buffer + bufferOffset, len); |
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135 ptr += len; |
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136 remaining -= len; |
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137 bufferOffset += len; |
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138 } |
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139 |
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140 return 0; |
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141 } |
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142 |
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143 /* Dummy functions -- we don't use thread-based audio */ |
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144 void Core_WaitAudio(_THIS) |
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145 { |
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146 return; |
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147 } |
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148 |
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149 void Core_PlayAudio(_THIS) |
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150 { |
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151 return; |
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152 } |
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153 |
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154 Uint8 *Core_GetAudioBuf(_THIS) |
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155 { |
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156 return(NULL); |
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157 } |
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158 |
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159 void Core_CloseAudio(_THIS) |
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160 { |
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161 OSStatus result; |
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162 struct AudioUnitInputCallback callback; |
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163 |
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164 /* stop processing the audio unit */ |
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165 result = AudioOutputUnitStop (outputAudioUnit); |
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166 if (result != noErr) { |
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167 SDL_SetError("Core_CloseAudio: AudioOutputUnitStop"); |
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168 return; |
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169 } |
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170 |
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171 /* Remove the input callback */ |
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172 callback.inputProc = 0; |
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173 callback.inputProcRefCon = 0; |
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174 result = AudioUnitSetProperty (outputAudioUnit, |
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175 kAudioUnitProperty_SetInputCallback, |
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176 kAudioUnitScope_Input, |
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177 0, |
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178 &callback, |
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179 sizeof(callback)); |
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180 if (result != noErr) { |
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181 SDL_SetError("Core_CloseAudio: AudioUnitSetProperty (kAudioUnitProperty_SetInputCallback)"); |
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182 return; |
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183 } |
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184 |
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185 result = CloseComponent(outputAudioUnit); |
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186 if (result != noErr) { |
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187 SDL_SetError("Core_CloseAudio: CloseComponent"); |
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188 return; |
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189 } |
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190 |
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191 SDL_free(buffer); |
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192 } |
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193 |
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194 #define CHECK_RESULT(msg) \ |
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195 if (result != noErr) { \ |
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196 SDL_SetError("Failed to start CoreAudio: " msg); \ |
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197 return -1; \ |
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198 } |
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199 |
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200 |
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201 int Core_OpenAudio(_THIS, SDL_AudioSpec *spec) |
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202 { |
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203 OSStatus result = noErr; |
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204 Component comp; |
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205 ComponentDescription desc; |
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206 struct AudioUnitInputCallback callback; |
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207 AudioStreamBasicDescription requestedDesc; |
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208 |
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|
209 /* Setup a AudioStreamBasicDescription with the requested format */ |
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210 requestedDesc.mFormatID = kAudioFormatLinearPCM; |
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211 requestedDesc.mFormatFlags = kLinearPCMFormatFlagIsPacked; |
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212 requestedDesc.mChannelsPerFrame = spec->channels; |
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213 requestedDesc.mSampleRate = spec->freq; |
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214 |
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|
215 requestedDesc.mBitsPerChannel = spec->format & 0xFF; |
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216 if (spec->format & 0x8000) |
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217 requestedDesc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger; |
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218 if (spec->format & 0x1000) |
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|
219 requestedDesc.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian; |
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220 |
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|
221 requestedDesc.mFramesPerPacket = 1; |
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|
222 requestedDesc.mBytesPerFrame = requestedDesc.mBitsPerChannel * requestedDesc.mChannelsPerFrame / 8; |
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223 requestedDesc.mBytesPerPacket = requestedDesc.mBytesPerFrame * requestedDesc.mFramesPerPacket; |
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224 |
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225 |
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226 /* Locate the default output audio unit */ |
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227 desc.componentType = kAudioUnitComponentType; |
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228 desc.componentSubType = kAudioUnitSubType_Output; |
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229 desc.componentManufacturer = kAudioUnitID_DefaultOutput; |
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230 desc.componentFlags = 0; |
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231 desc.componentFlagsMask = 0; |
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232 |
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233 comp = FindNextComponent (NULL, &desc); |
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234 if (comp == NULL) { |
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235 SDL_SetError ("Failed to start CoreAudio: FindNextComponent returned NULL"); |
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236 return -1; |
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237 } |
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238 |
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239 /* Open & initialize the default output audio unit */ |
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240 result = OpenAComponent (comp, &outputAudioUnit); |
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241 CHECK_RESULT("OpenAComponent") |
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242 |
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243 result = AudioUnitInitialize (outputAudioUnit); |
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244 CHECK_RESULT("AudioUnitInitialize") |
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245 |
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246 /* Set the input format of the audio unit. */ |
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247 result = AudioUnitSetProperty (outputAudioUnit, |
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248 kAudioUnitProperty_StreamFormat, |
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249 kAudioUnitScope_Input, |
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250 0, |
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251 &requestedDesc, |
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252 sizeof (requestedDesc)); |
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253 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_StreamFormat)") |
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254 |
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255 /* Set the audio callback */ |
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256 callback.inputProc = audioCallback; |
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257 callback.inputProcRefCon = this; |
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258 result = AudioUnitSetProperty (outputAudioUnit, |
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259 kAudioUnitProperty_SetInputCallback, |
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260 kAudioUnitScope_Input, |
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261 0, |
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262 &callback, |
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263 sizeof(callback)); |
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264 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_SetInputCallback)") |
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265 |
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266 /* Calculate the final parameters for this audio specification */ |
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267 SDL_CalculateAudioSpec(spec); |
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268 |
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269 /* Allocate a sample buffer */ |
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270 bufferOffset = bufferSize = this->spec.size; |
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271 buffer = SDL_malloc(bufferSize); |
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272 |
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273 /* Finally, start processing of the audio unit */ |
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274 result = AudioOutputUnitStart (outputAudioUnit); |
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275 CHECK_RESULT("AudioOutputUnitStart") |
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276 |
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277 |
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278 /* We're running! */ |
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279 return(1); |
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280 } |