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annotate src/audio/macosx/SDL_coreaudio.c @ 1614:6162b8d921ce

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Date: Wed, 29 Mar 2006 17:26:55 +0200 CEST From: "Fran���is Revol" Subject: [SDL] BeOS port fix: PrintScreen key crashing It seems the latest SDL crashes when someone hits the PrtScrn key in ZETA (BeOS R6), somewhere it gets a negative value as key code (or a big unsigned maybe ?), and uses it as an index in the keysym table... I'll investigate the cause for the negative value, but it's always better to check for bounds correctly when indexing a table. The attached diff fixes it. Fran���is Revol -- Software Architect yellowTAB GmbH
author Sam Lantinga <slouken@libsdl.org>
date Fri, 31 Mar 2006 06:16:20 +0000
parents dc6b59e925a2
children 782fd950bd46 c121d94672cb 9df8136abec0
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #include <AudioUnit/AudioUnit.h>
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25
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26 #include "SDL_audio.h"
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27 #include "../SDL_audio_c.h"
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28 #include "../SDL_sysaudio.h"
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29 #include "SDL_coreaudio.h"
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30
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31
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32 /* Audio driver functions */
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33
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34 static int Core_OpenAudio(_THIS, SDL_AudioSpec *spec);
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35 static void Core_WaitAudio(_THIS);
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36 static void Core_PlayAudio(_THIS);
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37 static Uint8 *Core_GetAudioBuf(_THIS);
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38 static void Core_CloseAudio(_THIS);
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39
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40 /* Audio driver bootstrap functions */
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41
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42 static int Audio_Available(void)
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43 {
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44 return(1);
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45 }
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46
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47 static void Audio_DeleteDevice(SDL_AudioDevice *device)
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48 {
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49 SDL_free(device->hidden);
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50 SDL_free(device);
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51 }
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52
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53 static SDL_AudioDevice *Audio_CreateDevice(int devindex)
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54 {
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55 SDL_AudioDevice *this;
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56
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57 /* Initialize all variables that we clean on shutdown */
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58 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
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59 if ( this ) {
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60 SDL_memset(this, 0, (sizeof *this));
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61 this->hidden = (struct SDL_PrivateAudioData *)
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62 SDL_malloc((sizeof *this->hidden));
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63 }
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64 if ( (this == NULL) || (this->hidden == NULL) ) {
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65 SDL_OutOfMemory();
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66 if ( this ) {
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67 SDL_free(this);
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68 }
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69 return(0);
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70 }
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71 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
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72
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73 /* Set the function pointers */
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74 this->OpenAudio = Core_OpenAudio;
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75 this->WaitAudio = Core_WaitAudio;
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76 this->PlayAudio = Core_PlayAudio;
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77 this->GetAudioBuf = Core_GetAudioBuf;
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78 this->CloseAudio = Core_CloseAudio;
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79
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80 this->free = Audio_DeleteDevice;
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81
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82 return this;
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83 }
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84
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85 AudioBootStrap COREAUDIO_bootstrap = {
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86 "coreaudio", "Mac OS X CoreAudio",
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87 Audio_Available, Audio_CreateDevice
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88 };
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89
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90 /* The CoreAudio callback */
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91 static OSStatus audioCallback (void *inRefCon,
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92 AudioUnitRenderActionFlags inActionFlags,
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93 const AudioTimeStamp *inTimeStamp,
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94 UInt32 inBusNumber,
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95 AudioBuffer *ioData)
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96 {
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97 SDL_AudioDevice *this = (SDL_AudioDevice *)inRefCon;
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98 UInt32 remaining, len;
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99 void *ptr;
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100
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101 /* Only do anything if audio is enabled and not paused */
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102 if ( ! this->enabled || this->paused ) {
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103 SDL_memset(ioData->mData, this->spec.silence, ioData->mDataByteSize);
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104 return 0;
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105 }
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106
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107 /* No SDL conversion should be needed here, ever, since we accept
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108 any input format in OpenAudio, and leave the conversion to CoreAudio.
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109 */
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110 /*
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111 assert(!this->convert.needed);
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112 assert(this->spec.channels == ioData->mNumberChannels);
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113 */
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114
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115 remaining = ioData->mDataByteSize;
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116 ptr = ioData->mData;
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117 while (remaining > 0) {
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118 if (bufferOffset >= bufferSize) {
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119 /* Generate the data */
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120 SDL_memset(buffer, this->spec.silence, bufferSize);
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121 SDL_mutexP(this->mixer_lock);
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122 (*this->spec.callback)(this->spec.userdata,
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123 buffer, bufferSize);
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124 SDL_mutexV(this->mixer_lock);
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125 bufferOffset = 0;
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126 }
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diff changeset
127
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128 len = bufferSize - bufferOffset;
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129 if (len > remaining)
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130 len = remaining;
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131 SDL_memcpy(ptr, (char *)buffer + bufferOffset, len);
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132 ptr = (char *)ptr + len;
935
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133 remaining -= len;
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134 bufferOffset += len;
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135 }
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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diff changeset
136
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137 return 0;
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diff changeset
138 }
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diff changeset
139
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diff changeset
140 /* Dummy functions -- we don't use thread-based audio */
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141 void Core_WaitAudio(_THIS)
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142 {
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143 return;
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144 }
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diff changeset
145
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diff changeset
146 void Core_PlayAudio(_THIS)
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diff changeset
147 {
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diff changeset
148 return;
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diff changeset
149 }
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diff changeset
150
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diff changeset
151 Uint8 *Core_GetAudioBuf(_THIS)
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152 {
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153 return(NULL);
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154 }
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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155
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156 void Core_CloseAudio(_THIS)
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157 {
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158 OSStatus result;
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84f930aebaeb CoreAudio driver works on Mac OSX 10.1
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159 struct AudioUnitInputCallback callback;
935
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diff changeset
160
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diff changeset
161 /* stop processing the audio unit */
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diff changeset
162 result = AudioOutputUnitStop (outputAudioUnit);
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163 if (result != noErr) {
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diff changeset
164 SDL_SetError("Core_CloseAudio: AudioOutputUnitStop");
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165 return;
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166 }
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diff changeset
167
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diff changeset
168 /* Remove the input callback */
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diff changeset
169 callback.inputProc = 0;
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170 callback.inputProcRefCon = 0;
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diff changeset
171 result = AudioUnitSetProperty (outputAudioUnit,
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diff changeset
172 kAudioUnitProperty_SetInputCallback,
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diff changeset
173 kAudioUnitScope_Input,
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diff changeset
174 0,
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diff changeset
175 &callback,
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
176 sizeof(callback));
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diff changeset
177 if (result != noErr) {
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diff changeset
178 SDL_SetError("Core_CloseAudio: AudioUnitSetProperty (kAudioUnitProperty_SetInputCallback)");
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diff changeset
179 return;
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180 }
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diff changeset
181
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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diff changeset
182 result = CloseComponent(outputAudioUnit);
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diff changeset
183 if (result != noErr) {
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diff changeset
184 SDL_SetError("Core_CloseAudio: CloseComponent");
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185 return;
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186 }
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187
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
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188 SDL_free(buffer);
935
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189 }
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diff changeset
190
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diff changeset
191 #define CHECK_RESULT(msg) \
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diff changeset
192 if (result != noErr) { \
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diff changeset
193 SDL_SetError("Failed to start CoreAudio: " msg); \
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diff changeset
194 return -1; \
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195 }
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
196
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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diff changeset
197
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diff changeset
198 int Core_OpenAudio(_THIS, SDL_AudioSpec *spec)
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diff changeset
199 {
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diff changeset
200 OSStatus result = noErr;
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diff changeset
201 Component comp;
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diff changeset
202 ComponentDescription desc;
936
84f930aebaeb CoreAudio driver works on Mac OSX 10.1
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parents: 935
diff changeset
203 struct AudioUnitInputCallback callback;
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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diff changeset
204 AudioStreamBasicDescription requestedDesc;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
205
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
206 /* Setup a AudioStreamBasicDescription with the requested format */
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parents:
diff changeset
207 requestedDesc.mFormatID = kAudioFormatLinearPCM;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
208 requestedDesc.mFormatFlags = kLinearPCMFormatFlagIsPacked;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
209 requestedDesc.mChannelsPerFrame = spec->channels;
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parents:
diff changeset
210 requestedDesc.mSampleRate = spec->freq;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
211
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
212 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
213 if (spec->format & 0x8000)
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parents:
diff changeset
214 requestedDesc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
215 if (spec->format & 0x1000)
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
216 requestedDesc.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
217
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
218 requestedDesc.mFramesPerPacket = 1;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
219 requestedDesc.mBytesPerFrame = requestedDesc.mBitsPerChannel * requestedDesc.mChannelsPerFrame / 8;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
220 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
221
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
222
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
223 /* Locate 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
224 desc.componentType = kAudioUnitComponentType;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
225 desc.componentSubType = kAudioUnitSubType_Output;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
226 desc.componentManufacturer = kAudioUnitID_DefaultOutput;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
227 desc.componentFlags = 0;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
228 desc.componentFlagsMask = 0;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
229
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
230 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
231 if (comp == NULL) {
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
232 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
233 return -1;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
234 }
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
235
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
236 /* 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
237 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
238 CHECK_RESULT("OpenAComponent")
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
239
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
240 result = AudioUnitInitialize (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("AudioUnitInitialize")
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 /* 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
244 result = AudioUnitSetProperty (outputAudioUnit,
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
245 kAudioUnitProperty_StreamFormat,
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
246 kAudioUnitScope_Input,
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
247 0,
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
248 &requestedDesc,
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
249 sizeof (requestedDesc));
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
250 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_StreamFormat)")
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
251
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
252 /* Set the audio callback */
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
253 callback.inputProc = audioCallback;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
254 callback.inputProcRefCon = this;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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255 result = AudioUnitSetProperty (outputAudioUnit,
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256 kAudioUnitProperty_SetInputCallback,
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257 kAudioUnitScope_Input,
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258 0,
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259 &callback,
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260 sizeof(callback));
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261 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_SetInputCallback)")
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262
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263 /* Calculate the final parameters for this audio specification */
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264 SDL_CalculateAudioSpec(spec);
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265
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266 /* Allocate a sample buffer */
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267 bufferOffset = bufferSize = this->spec.size;
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268 buffer = SDL_malloc(bufferSize);
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269
935
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270 /* Finally, start processing of the audio unit */
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271 result = AudioOutputUnitStart (outputAudioUnit);
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272 CHECK_RESULT("AudioOutputUnitStart")
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273
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274
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275 /* We're running! */
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276 return(1);
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277 }