author | Ryan C. Gordon <icculus@icculus.org> |
Fri, 01 Sep 2006 05:31:36 +0000 | |
changeset 2003 | 506851d3efa4 |
parent 1895 | c121d94672cb |
child 2016 | 72fa74928062 |
permissions | -rw-r--r-- |
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/* |
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SDL - Simple DirectMedia Layer |
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Copyright (C) 1997-2006 Sam Lantinga |
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This library is free software; you can redistribute it and/or |
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modify it under the terms of the GNU Lesser General Public |
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License as published by the Free Software Foundation; either |
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version 2.1 of the License, or (at your option) any later version. |
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This library is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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Lesser General Public License for more details. |
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You should have received a copy of the GNU Lesser General Public |
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License along with this library; if not, write to the Free Software |
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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Sam Lantinga |
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slouken@libsdl.org |
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*/ |
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#include "SDL_config.h" |
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#include <AudioUnit/AudioUnit.h> |
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#include "SDL_audio.h" |
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#include "../SDL_audio_c.h" |
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#include "../SDL_sysaudio.h" |
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#include "SDL_coreaudio.h" |
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/* Audio driver functions */ |
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static int Core_OpenAudio(_THIS, SDL_AudioSpec * spec); |
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static void Core_WaitAudio(_THIS); |
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static void Core_PlayAudio(_THIS); |
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static Uint8 *Core_GetAudioBuf(_THIS); |
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static void Core_CloseAudio(_THIS); |
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/* Audio driver bootstrap functions */ |
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static int |
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Audio_Available(void) |
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{ |
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return (1); |
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} |
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static void |
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Audio_DeleteDevice(SDL_AudioDevice * device) |
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{ |
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SDL_free(device->hidden); |
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SDL_free(device); |
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} |
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static SDL_AudioDevice * |
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Audio_CreateDevice(int devindex) |
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{ |
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SDL_AudioDevice *this; |
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/* Initialize all variables that we clean on shutdown */ |
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this = (SDL_AudioDevice *) SDL_malloc(sizeof(SDL_AudioDevice)); |
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if (this) { |
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SDL_memset(this, 0, (sizeof *this)); |
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this->hidden = (struct SDL_PrivateAudioData *) |
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SDL_malloc((sizeof *this->hidden)); |
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} |
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if ((this == NULL) || (this->hidden == NULL)) { |
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SDL_OutOfMemory(); |
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if (this) { |
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SDL_free(this); |
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} |
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return (0); |
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} |
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SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
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/* Set the function pointers */ |
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this->OpenAudio = Core_OpenAudio; |
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this->WaitAudio = Core_WaitAudio; |
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this->PlayAudio = Core_PlayAudio; |
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this->GetAudioBuf = Core_GetAudioBuf; |
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this->CloseAudio = Core_CloseAudio; |
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this->free = Audio_DeleteDevice; |
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return this; |
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} |
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AudioBootStrap COREAUDIO_bootstrap = { |
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"coreaudio", "Mac OS X CoreAudio", |
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Audio_Available, Audio_CreateDevice |
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}; |
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/* The CoreAudio callback */ |
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static OSStatus |
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audioCallback(void *inRefCon, |
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AudioUnitRenderActionFlags inActionFlags, |
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const AudioTimeStamp * inTimeStamp, |
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UInt32 inBusNumber, AudioBuffer * ioData) |
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{ |
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SDL_AudioDevice *this = (SDL_AudioDevice *) inRefCon; |
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UInt32 remaining, len; |
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void *ptr; |
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/* Only do anything if audio is enabled and not paused */ |
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if (!this->enabled || this->paused) { |
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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, buffer, bufferSize); |
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|
126 |
SDL_mutexV(this->mixer_lock); |
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|
127 |
bufferOffset = 0; |
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|
128 |
} |
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129 |
|
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|
130 |
len = bufferSize - bufferOffset; |
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|
131 |
if (len > remaining) |
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|
132 |
len = remaining; |
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133 |
SDL_memcpy(ptr, (char *) buffer + bufferOffset, len); |
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|
134 |
ptr = (char *) ptr + len; |
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|
135 |
remaining -= len; |
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|
136 |
bufferOffset += len; |
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|
137 |
} |
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|
138 |
|
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|
139 |
return 0; |
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|
140 |
} |
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|
141 |
|
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|
142 |
/* Dummy functions -- we don't use thread-based audio */ |
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143 |
void |
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144 |
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 |
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150 |
Core_PlayAudio(_THIS) |
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|
151 |
{ |
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|
152 |
return; |
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|
153 |
} |
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changeset
|
154 |
|
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|
155 |
Uint8 * |
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|
156 |
Core_GetAudioBuf(_THIS) |
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|
157 |
{ |
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|
158 |
return (NULL); |
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|
159 |
} |
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changeset
|
160 |
|
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|
161 |
void |
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|
162 |
Core_CloseAudio(_THIS) |
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|
163 |
{ |
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|
164 |
OSStatus result; |
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|
165 |
struct AudioUnitInputCallback callback; |
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|
166 |
|
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|
167 |
/* stop processing the audio unit */ |
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|
168 |
result = AudioOutputUnitStop(outputAudioUnit); |
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|
169 |
if (result != noErr) { |
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|
170 |
SDL_SetError("Core_CloseAudio: AudioOutputUnitStop"); |
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|
171 |
return; |
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changeset
|
172 |
} |
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changeset
|
173 |
|
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changeset
|
174 |
/* Remove the input callback */ |
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changeset
|
175 |
callback.inputProc = 0; |
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|
176 |
callback.inputProcRefCon = 0; |
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|
177 |
result = AudioUnitSetProperty(outputAudioUnit, |
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|
178 |
kAudioUnitProperty_SetInputCallback, |
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|
179 |
kAudioUnitScope_Input, |
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|
180 |
0, &callback, sizeof(callback)); |
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|
181 |
if (result != noErr) { |
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|
182 |
SDL_SetError |
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|
183 |
("Core_CloseAudio: AudioUnitSetProperty (kAudioUnitProperty_SetInputCallback)"); |
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changeset
|
184 |
return; |
f8d5ddc7aef1
Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
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changeset
|
185 |
} |
f8d5ddc7aef1
Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
186 |
|
f8d5ddc7aef1
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Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
187 |
result = CloseComponent(outputAudioUnit); |
f8d5ddc7aef1
Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
188 |
if (result != noErr) { |
f8d5ddc7aef1
Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
189 |
SDL_SetError("Core_CloseAudio: CloseComponent"); |
f8d5ddc7aef1
Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
190 |
return; |
f8d5ddc7aef1
Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
191 |
} |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
192 |
|
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Use SDL_ prefixed versions of C library functions.
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1312
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changeset
|
193 |
SDL_free(buffer); |
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diff
changeset
|
194 |
} |
f8d5ddc7aef1
Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
195 |
|
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Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
196 |
#define CHECK_RESULT(msg) \ |
f8d5ddc7aef1
Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
197 |
if (result != noErr) { \ |
f8d5ddc7aef1
Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
198 |
SDL_SetError("Failed to start CoreAudio: " msg); \ |
f8d5ddc7aef1
Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
199 |
return -1; \ |
f8d5ddc7aef1
Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
200 |
} |
f8d5ddc7aef1
Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
201 |
|
f8d5ddc7aef1
Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
202 |
|
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|
203 |
int |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
204 |
Core_OpenAudio(_THIS, SDL_AudioSpec * spec) |
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changeset
|
205 |
{ |
f8d5ddc7aef1
Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
206 |
OSStatus result = noErr; |
f8d5ddc7aef1
Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
207 |
Component comp; |
f8d5ddc7aef1
Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
208 |
ComponentDescription desc; |
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CoreAudio driver works on Mac OSX 10.1
Sam Lantinga <slouken@libsdl.org>
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changeset
|
209 |
struct AudioUnitInputCallback callback; |
2003
506851d3efa4
Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents:
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|
210 |
AudioStreamBasicDescription desc; |
506851d3efa4
Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents:
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|
211 |
SDL_AudioFormat test_format = SDL_FirstAudioFormat(spec->format); |
506851d3efa4
Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents:
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|
212 |
int valid_datatype = 0; |
935
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Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
213 |
|
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Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
214 |
/* Setup a AudioStreamBasicDescription with the requested format */ |
2003
506851d3efa4
Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents:
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|
215 |
memset(&desc, '\0', sizeof (AudioStreamBasicDescription)); |
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216 |
desc.mFormatID = kAudioFormatLinearPCM; |
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217 |
desc.mFormatFlags = kLinearPCMFormatFlagIsPacked; |
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218 |
desc.mChannelsPerFrame = spec->channels; |
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219 |
desc.mSampleRate = spec->freq; |
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220 |
desc.mFramesPerPacket = 1; |
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221 |
|
2003
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222 |
while ((!valid_datatype) && (test_format)) { |
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223 |
spec->format = test_format; |
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224 |
desc.mFormatFlags = 0; |
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225 |
/* Just a list of valid SDL formats, so people don't pass junk here. */ |
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226 |
switch (test_format) { |
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227 |
case AUDIO_U8: |
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228 |
case AUDIO_S8: |
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229 |
case AUDIO_U16LSB: |
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230 |
case AUDIO_S16LSB: |
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231 |
case AUDIO_U16MSB: |
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232 |
case AUDIO_S16MSB: |
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233 |
case AUDIO_S32LSB: |
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234 |
case AUDIO_S32MSB: |
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235 |
case AUDIO_F32LSB: |
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236 |
case AUDIO_F32MSB: |
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|
237 |
valid_datatype = 1; |
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238 |
desc.mBitsPerChannel = SDL_AUDIO_BITSIZE(spec->format); |
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|
239 |
|
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|
240 |
if (SDL_AUDIO_ISFLOAT(spec->format)) |
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|
241 |
desc.mFormatFlags |= kLinearPCMFormatFlagIsFloat; |
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242 |
else if (SDL_AUDIO_ISSIGNED(spec->format)) |
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|
243 |
desc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger; |
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|
244 |
|
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|
245 |
if (SDL_AUDIO_ISBIGENDIAN(spec->format)) |
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246 |
desc.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian; |
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|
247 |
break; |
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248 |
} |
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249 |
} |
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|
250 |
|
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|
251 |
if (!valid_datatype) { /* shouldn't happen, but just in case... */ |
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|
252 |
SDL_SetError("Unsupported audio format"); |
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253 |
return (-1); |
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|
254 |
} |
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|
255 |
|
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|
256 |
desc.mBytesPerFrame = |
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|
257 |
desc.mBitsPerChannel * desc.mChannelsPerFrame / 8; |
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|
258 |
desc.mBytesPerPacket = |
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|
259 |
desc.mBytesPerFrame * desc.mFramesPerPacket; |
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|
260 |
|
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|
261 |
|
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|
262 |
/* Locate the default output audio unit */ |
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|
263 |
desc.componentType = kAudioUnitComponentType; |
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changeset
|
264 |
desc.componentSubType = kAudioUnitSubType_Output; |
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|
265 |
desc.componentManufacturer = kAudioUnitID_DefaultOutput; |
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|
266 |
desc.componentFlags = 0; |
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|
267 |
desc.componentFlagsMask = 0; |
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|
268 |
|
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|
269 |
comp = FindNextComponent(NULL, &desc); |
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|
270 |
if (comp == NULL) { |
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|
271 |
SDL_SetError |
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|
272 |
("Failed to start CoreAudio: FindNextComponent returned NULL"); |
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|
273 |
return -1; |
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|
274 |
} |
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|
275 |
|
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|
276 |
/* Open & initialize the default output audio unit */ |
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|
277 |
result = OpenAComponent(comp, &outputAudioUnit); |
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|
278 |
CHECK_RESULT("OpenAComponent") |
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|
279 |
result = AudioUnitInitialize(outputAudioUnit); |
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|
280 |
CHECK_RESULT("AudioUnitInitialize") |
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|
281 |
/* Set the input format of the audio unit. */ |
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|
282 |
result = AudioUnitSetProperty(outputAudioUnit, |
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|
283 |
kAudioUnitProperty_StreamFormat, |
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|
284 |
kAudioUnitScope_Input, |
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|
285 |
0, |
2003
506851d3efa4
Mac OS X audio backend now supports int32/float32.
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|
286 |
&desc, sizeof (desc)); |
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changeset
|
287 |
CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_StreamFormat)") |
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|
288 |
/* Set the audio callback */ |
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|
289 |
callback.inputProc = audioCallback; |
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|
290 |
callback.inputProcRefCon = this; |
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|
291 |
result = AudioUnitSetProperty(outputAudioUnit, |
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|
292 |
kAudioUnitProperty_SetInputCallback, |
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|
293 |
kAudioUnitScope_Input, |
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|
294 |
0, &callback, sizeof(callback)); |
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|
295 |
CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_SetInputCallback)") |
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|
296 |
/* Calculate the final parameters for this audio specification */ |
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|
297 |
SDL_CalculateAudioSpec(spec); |
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|
298 |
|
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|
299 |
/* Allocate a sample buffer */ |
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changeset
|
300 |
bufferOffset = bufferSize = this->spec.size; |
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
301 |
buffer = SDL_malloc(bufferSize); |
1338
604d73db6802
Removed uses of stdlib.h and string.h
Sam Lantinga <slouken@libsdl.org>
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changeset
|
302 |
|
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changeset
|
303 |
/* Finally, start processing of the audio unit */ |
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|
304 |
result = AudioOutputUnitStart(outputAudioUnit); |
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|
305 |
CHECK_RESULT("AudioOutputUnitStart") |
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|
306 |
/* We're running! */ |
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|
307 |
return (1); |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
308 |
} |
935
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changeset
|
309 |
|
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|
310 |
/* vi: set ts=4 sw=4 expandtab: */ |