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Diffstat (limited to 'distrib/sdl-1.2.12/src/audio/macosx/SDL_coreaudio.c')
-rw-r--r--distrib/sdl-1.2.12/src/audio/macosx/SDL_coreaudio.c277
1 files changed, 0 insertions, 277 deletions
diff --git a/distrib/sdl-1.2.12/src/audio/macosx/SDL_coreaudio.c b/distrib/sdl-1.2.12/src/audio/macosx/SDL_coreaudio.c
deleted file mode 100644
index 2cae958..0000000
--- a/distrib/sdl-1.2.12/src/audio/macosx/SDL_coreaudio.c
+++ /dev/null
@@ -1,277 +0,0 @@
-/*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997-2006 Sam Lantinga
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with this library; if not, write to the Free Software
- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
- Sam Lantinga
- slouken@libsdl.org
-*/
-#include "SDL_config.h"
-
-#include <AudioUnit/AudioUnit.h>
-
-#include "SDL_audio.h"
-#include "../SDL_audio_c.h"
-#include "../SDL_sysaudio.h"
-#include "SDL_coreaudio.h"
-
-
-/* Audio driver functions */
-
-static int Core_OpenAudio(_THIS, SDL_AudioSpec *spec);
-static void Core_WaitAudio(_THIS);
-static void Core_PlayAudio(_THIS);
-static Uint8 *Core_GetAudioBuf(_THIS);
-static void Core_CloseAudio(_THIS);
-
-/* Audio driver bootstrap functions */
-
-static int Audio_Available(void)
-{
- return(1);
-}
-
-static void Audio_DeleteDevice(SDL_AudioDevice *device)
-{
- SDL_free(device->hidden);
- SDL_free(device);
-}
-
-static SDL_AudioDevice *Audio_CreateDevice(int devindex)
-{
- SDL_AudioDevice *this;
-
- /* Initialize all variables that we clean on shutdown */
- this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
- if ( this ) {
- SDL_memset(this, 0, (sizeof *this));
- this->hidden = (struct SDL_PrivateAudioData *)
- SDL_malloc((sizeof *this->hidden));
- }
- if ( (this == NULL) || (this->hidden == NULL) ) {
- SDL_OutOfMemory();
- if ( this ) {
- SDL_free(this);
- }
- return(0);
- }
- SDL_memset(this->hidden, 0, (sizeof *this->hidden));
-
- /* Set the function pointers */
- this->OpenAudio = Core_OpenAudio;
- this->WaitAudio = Core_WaitAudio;
- this->PlayAudio = Core_PlayAudio;
- this->GetAudioBuf = Core_GetAudioBuf;
- this->CloseAudio = Core_CloseAudio;
-
- this->free = Audio_DeleteDevice;
-
- return this;
-}
-
-AudioBootStrap COREAUDIO_bootstrap = {
- "coreaudio", "Mac OS X CoreAudio",
- Audio_Available, Audio_CreateDevice
-};
-
-/* The CoreAudio callback */
-static OSStatus audioCallback (void *inRefCon,
- AudioUnitRenderActionFlags inActionFlags,
- const AudioTimeStamp *inTimeStamp,
- UInt32 inBusNumber,
- AudioBuffer *ioData)
-{
- SDL_AudioDevice *this = (SDL_AudioDevice *)inRefCon;
- UInt32 remaining, len;
- void *ptr;
-
- /* Only do anything if audio is enabled and not paused */
- if ( ! this->enabled || this->paused ) {
- SDL_memset(ioData->mData, this->spec.silence, ioData->mDataByteSize);
- return 0;
- }
-
- /* No SDL conversion should be needed here, ever, since we accept
- any input format in OpenAudio, and leave the conversion to CoreAudio.
- */
- /*
- assert(!this->convert.needed);
- assert(this->spec.channels == ioData->mNumberChannels);
- */
-
- remaining = ioData->mDataByteSize;
- ptr = ioData->mData;
- while (remaining > 0) {
- if (bufferOffset >= bufferSize) {
- /* Generate the data */
- SDL_memset(buffer, this->spec.silence, bufferSize);
- SDL_mutexP(this->mixer_lock);
- (*this->spec.callback)(this->spec.userdata,
- buffer, bufferSize);
- SDL_mutexV(this->mixer_lock);
- bufferOffset = 0;
- }
-
- len = bufferSize - bufferOffset;
- if (len > remaining)
- len = remaining;
- SDL_memcpy(ptr, (char *)buffer + bufferOffset, len);
- ptr = (char *)ptr + len;
- remaining -= len;
- bufferOffset += len;
- }
-
- return 0;
-}
-
-/* Dummy functions -- we don't use thread-based audio */
-void Core_WaitAudio(_THIS)
-{
- return;
-}
-
-void Core_PlayAudio(_THIS)
-{
- return;
-}
-
-Uint8 *Core_GetAudioBuf(_THIS)
-{
- return(NULL);
-}
-
-void Core_CloseAudio(_THIS)
-{
- OSStatus result;
- struct AudioUnitInputCallback callback;
-
- /* stop processing the audio unit */
- result = AudioOutputUnitStop (outputAudioUnit);
- if (result != noErr) {
- SDL_SetError("Core_CloseAudio: AudioOutputUnitStop");
- return;
- }
-
- /* Remove the input callback */
- callback.inputProc = 0;
- callback.inputProcRefCon = 0;
- result = AudioUnitSetProperty (outputAudioUnit,
- kAudioUnitProperty_SetInputCallback,
- kAudioUnitScope_Input,
- 0,
- &callback,
- sizeof(callback));
- if (result != noErr) {
- SDL_SetError("Core_CloseAudio: AudioUnitSetProperty (kAudioUnitProperty_SetInputCallback)");
- return;
- }
-
- result = CloseComponent(outputAudioUnit);
- if (result != noErr) {
- SDL_SetError("Core_CloseAudio: CloseComponent");
- return;
- }
-
- SDL_free(buffer);
-}
-
-#define CHECK_RESULT(msg) \
- if (result != noErr) { \
- SDL_SetError("Failed to start CoreAudio: " msg); \
- return -1; \
- }
-
-
-int Core_OpenAudio(_THIS, SDL_AudioSpec *spec)
-{
- OSStatus result = noErr;
- Component comp;
- ComponentDescription desc;
- struct AudioUnitInputCallback callback;
- AudioStreamBasicDescription requestedDesc;
-
- /* Setup a AudioStreamBasicDescription with the requested format */
- requestedDesc.mFormatID = kAudioFormatLinearPCM;
- requestedDesc.mFormatFlags = kLinearPCMFormatFlagIsPacked;
- requestedDesc.mChannelsPerFrame = spec->channels;
- requestedDesc.mSampleRate = spec->freq;
-
- requestedDesc.mBitsPerChannel = spec->format & 0xFF;
- if (spec->format & 0x8000)
- requestedDesc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
- if (spec->format & 0x1000)
- requestedDesc.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian;
-
- requestedDesc.mFramesPerPacket = 1;
- requestedDesc.mBytesPerFrame = requestedDesc.mBitsPerChannel * requestedDesc.mChannelsPerFrame / 8;
- requestedDesc.mBytesPerPacket = requestedDesc.mBytesPerFrame * requestedDesc.mFramesPerPacket;
-
-
- /* Locate the default output audio unit */
- desc.componentType = kAudioUnitComponentType;
- desc.componentSubType = kAudioUnitSubType_Output;
- desc.componentManufacturer = kAudioUnitID_DefaultOutput;
- desc.componentFlags = 0;
- desc.componentFlagsMask = 0;
-
- comp = FindNextComponent (NULL, &desc);
- if (comp == NULL) {
- SDL_SetError ("Failed to start CoreAudio: FindNextComponent returned NULL");
- return -1;
- }
-
- /* Open & initialize the default output audio unit */
- result = OpenAComponent (comp, &outputAudioUnit);
- CHECK_RESULT("OpenAComponent")
-
- result = AudioUnitInitialize (outputAudioUnit);
- CHECK_RESULT("AudioUnitInitialize")
-
- /* Set the input format of the audio unit. */
- result = AudioUnitSetProperty (outputAudioUnit,
- kAudioUnitProperty_StreamFormat,
- kAudioUnitScope_Input,
- 0,
- &requestedDesc,
- sizeof (requestedDesc));
- CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_StreamFormat)")
-
- /* Set the audio callback */
- callback.inputProc = audioCallback;
- callback.inputProcRefCon = this;
- result = AudioUnitSetProperty (outputAudioUnit,
- kAudioUnitProperty_SetInputCallback,
- kAudioUnitScope_Input,
- 0,
- &callback,
- sizeof(callback));
- CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_SetInputCallback)")
-
- /* Calculate the final parameters for this audio specification */
- SDL_CalculateAudioSpec(spec);
-
- /* Allocate a sample buffer */
- bufferOffset = bufferSize = this->spec.size;
- buffer = SDL_malloc(bufferSize);
-
- /* Finally, start processing of the audio unit */
- result = AudioOutputUnitStart (outputAudioUnit);
- CHECK_RESULT("AudioOutputUnitStart")
-
-
- /* We're running! */
- return(1);
-}
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