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>
date Wed, 08 Feb 2006 17:19:43 +0000
parents 604d73db6802
children c71e05b4dc2e
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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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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diff changeset
123 SDL_memset(buffer, this->spec.silence, bufferSize);
935
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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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diff changeset
126 buffer, bufferSize);
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diff changeset
127 SDL_mutexV(this->mixer_lock);
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diff changeset
128 bufferOffset = 0;
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129 }
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diff changeset
130
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diff changeset
131 len = bufferSize - bufferOffset;
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132 if (len > remaining)
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diff changeset
133 len = remaining;
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diff changeset
134 SDL_memcpy(ptr, buffer + bufferOffset, len);
935
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135 ptr += len;
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diff changeset
136 remaining -= len;
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diff changeset
137 bufferOffset += len;
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diff changeset
138 }
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diff changeset
139
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140 return 0;
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diff changeset
141 }
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diff changeset
142
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diff changeset
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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diff changeset
149 void Core_PlayAudio(_THIS)
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diff changeset
150 {
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diff changeset
151 return;
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diff changeset
152 }
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diff changeset
153
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154 Uint8 *Core_GetAudioBuf(_THIS)
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155 {
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diff changeset
156 return(NULL);
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157 }
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diff changeset
158
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diff changeset
159 void Core_CloseAudio(_THIS)
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diff changeset
160 {
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diff changeset
161 OSStatus result;
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diff changeset
162 struct AudioUnitInputCallback callback;
935
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163
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164 /* stop processing the audio unit */
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diff changeset
165 result = AudioOutputUnitStop (outputAudioUnit);
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166 if (result != noErr) {
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diff changeset
167 SDL_SetError("Core_CloseAudio: AudioOutputUnitStop");
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diff changeset
168 return;
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169 }
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diff changeset
170
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171 /* Remove the input callback */
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diff changeset
172 callback.inputProc = 0;
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diff changeset
173 callback.inputProcRefCon = 0;
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diff changeset
174 result = AudioUnitSetProperty (outputAudioUnit,
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diff changeset
175 kAudioUnitProperty_SetInputCallback,
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diff changeset
176 kAudioUnitScope_Input,
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diff changeset
177 0,
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178 &callback,
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diff changeset
179 sizeof(callback));
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diff changeset
180 if (result != noErr) {
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diff changeset
181 SDL_SetError("Core_CloseAudio: AudioUnitSetProperty (kAudioUnitProperty_SetInputCallback)");
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182 return;
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183 }
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diff changeset
184
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diff changeset
185 result = CloseComponent(outputAudioUnit);
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diff changeset
186 if (result != noErr) {
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diff changeset
187 SDL_SetError("Core_CloseAudio: CloseComponent");
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diff changeset
188 return;
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189 }
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diff changeset
190
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diff changeset
191 SDL_free(buffer);
935
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192 }
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193
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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diff changeset
194 #define CHECK_RESULT(msg) \
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diff changeset
195 if (result != noErr) { \
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diff changeset
196 SDL_SetError("Failed to start CoreAudio: " msg); \
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diff changeset
197 return -1; \
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diff changeset
198 }
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diff changeset
199
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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diff changeset
200
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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diff changeset
201 int Core_OpenAudio(_THIS, SDL_AudioSpec *spec)
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diff changeset
202 {
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diff changeset
203 OSStatus result = noErr;
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diff changeset
204 Component comp;
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diff changeset
205 ComponentDescription desc;
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84f930aebaeb CoreAudio driver works on Mac OSX 10.1
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diff changeset
206 struct AudioUnitInputCallback callback;
935
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diff changeset
207 AudioStreamBasicDescription requestedDesc;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
208
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
209 /* Setup a AudioStreamBasicDescription with the requested format */
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parents:
diff changeset
210 requestedDesc.mFormatID = kAudioFormatLinearPCM;
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parents:
diff changeset
211 requestedDesc.mFormatFlags = kLinearPCMFormatFlagIsPacked;
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parents:
diff changeset
212 requestedDesc.mChannelsPerFrame = spec->channels;
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parents:
diff changeset
213 requestedDesc.mSampleRate = spec->freq;
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parents:
diff changeset
214
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
215 requestedDesc.mBitsPerChannel = spec->format & 0xFF;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
216 if (spec->format & 0x8000)
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
217 requestedDesc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
218 if (spec->format & 0x1000)
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
219 requestedDesc.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
220
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
221 requestedDesc.mFramesPerPacket = 1;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
222 requestedDesc.mBytesPerFrame = requestedDesc.mBitsPerChannel * requestedDesc.mChannelsPerFrame / 8;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
223 requestedDesc.mBytesPerPacket = requestedDesc.mBytesPerFrame * requestedDesc.mFramesPerPacket;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
224
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
225
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
226 /* Locate the default output audio unit */
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
227 desc.componentType = kAudioUnitComponentType;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
228 desc.componentSubType = kAudioUnitSubType_Output;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
229 desc.componentManufacturer = kAudioUnitID_DefaultOutput;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
230 desc.componentFlags = 0;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
231 desc.componentFlagsMask = 0;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
232
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
233 comp = FindNextComponent (NULL, &desc);
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
234 if (comp == NULL) {
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
235 SDL_SetError ("Failed to start CoreAudio: FindNextComponent returned NULL");
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
236 return -1;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
237 }
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
238
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
239 /* Open & initialize the default output audio unit */
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
240 result = OpenAComponent (comp, &outputAudioUnit);
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
241 CHECK_RESULT("OpenAComponent")
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
242
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
243 result = AudioUnitInitialize (outputAudioUnit);
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
244 CHECK_RESULT("AudioUnitInitialize")
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
245
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
246 /* Set the input format of the audio unit. */
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
247 result = AudioUnitSetProperty (outputAudioUnit,
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
248 kAudioUnitProperty_StreamFormat,
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
249 kAudioUnitScope_Input,
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
250 0,
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
251 &requestedDesc,
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
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
935
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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 }