mirror of https://github.com/OpenTTD/OpenTTD.git
145 lines
4.5 KiB
C++
145 lines
4.5 KiB
C++
/* $Id$ */
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/*****************************************************************************
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* Cocoa sound driver *
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* Known things left to do: *
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* - Might need to do endian checking for it to work on both ppc and x86 *
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*****************************************************************************/
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#ifdef WITH_COCOA
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#include <AudioUnit/AudioUnit.h>
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/* Name conflict */
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#define Rect OTTDRect
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#define Point OTTDPoint
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#define WindowClass OTTDWindowClass
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/* Defined in stdbool.h */
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#ifndef __cplusplus
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# ifndef __BEOS__
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# undef bool
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# undef false
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# undef true
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# endif
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#endif
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#include "../stdafx.h"
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#include "../openttd.h"
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#include "../debug.h"
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#include "../driver.h"
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#include "../mixer.h"
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#include "../sdl.h"
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#include "cocoa_s.h"
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#undef WindowClass
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#undef Point
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#undef Rect
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static FSoundDriver_Cocoa iFSoundDriver_Cocoa;
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static AudioUnit _outputAudioUnit;
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/* The CoreAudio callback */
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static OSStatus audioCallback(void *inRefCon, AudioUnitRenderActionFlags inActionFlags, const AudioTimeStamp *inTimeStamp, UInt32 inBusNumber, AudioBuffer *ioData)
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{
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MxMixSamples(ioData->mData, ioData->mDataByteSize / 4);
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return noErr;
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}
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const char *SoundDriver_Cocoa::Start(const char * const *parm)
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{
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Component comp;
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ComponentDescription desc;
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struct AudioUnitInputCallback callback;
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AudioStreamBasicDescription requestedDesc;
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/* Setup a AudioStreamBasicDescription with the requested format */
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requestedDesc.mFormatID = kAudioFormatLinearPCM;
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requestedDesc.mFormatFlags = kLinearPCMFormatFlagIsPacked;
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requestedDesc.mChannelsPerFrame = 2;
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requestedDesc.mSampleRate = GetDriverParamInt(parm, "hz", 11025);
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requestedDesc.mBitsPerChannel = 16;
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requestedDesc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
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#ifdef TTD_BIG_ENDIAN
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requestedDesc.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian;
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#endif
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requestedDesc.mFramesPerPacket = 1;
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requestedDesc.mBytesPerFrame = requestedDesc.mBitsPerChannel * requestedDesc.mChannelsPerFrame / 8;
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requestedDesc.mBytesPerPacket = requestedDesc.mBytesPerFrame * requestedDesc.mFramesPerPacket;
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/* Locate the default output audio unit */
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desc.componentType = kAudioUnitComponentType;
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desc.componentSubType = kAudioUnitSubType_Output;
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desc.componentManufacturer = kAudioUnitID_DefaultOutput;
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desc.componentFlags = 0;
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desc.componentFlagsMask = 0;
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comp = FindNextComponent (NULL, &desc);
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if (comp == NULL) {
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return "cocoa_s: Failed to start CoreAudio: FindNextComponent returned NULL";
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}
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/* Open & initialize the default output audio unit */
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if (OpenAComponent(comp, &_outputAudioUnit) != noErr) {
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return "cocoa_s: Failed to start CoreAudio: OpenAComponent";
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}
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if (AudioUnitInitialize(_outputAudioUnit) != noErr) {
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return "cocoa_s: Failed to start CoreAudio: AudioUnitInitialize";
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}
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/* Set the input format of the audio unit. */
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if (AudioUnitSetProperty(_outputAudioUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &requestedDesc, sizeof(requestedDesc)) != noErr) {
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return "cocoa_s: Failed to start CoreAudio: AudioUnitSetProperty (kAudioUnitProperty_StreamFormat)";
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}
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/* Set the audio callback */
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callback.inputProc = audioCallback;
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callback.inputProcRefCon = NULL;
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if (AudioUnitSetProperty(_outputAudioUnit, kAudioUnitProperty_SetInputCallback, kAudioUnitScope_Input, 0, &callback, sizeof(callback)) != noErr) {
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return "cocoa_s: Failed to start CoreAudio: AudioUnitSetProperty (kAudioUnitProperty_SetInputCallback)";
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}
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/* Finally, start processing of the audio unit */
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if (AudioOutputUnitStart(_outputAudioUnit) != noErr) {
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return "cocoa_s: Failed to start CoreAudio: AudioOutputUnitStart";
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}
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/* We're running! */
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return NULL;
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}
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void SoundDriver_Cocoa::Stop()
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{
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struct AudioUnitInputCallback callback;
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/* stop processing the audio unit */
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if (AudioOutputUnitStop(_outputAudioUnit) != noErr) {
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DEBUG(driver, 0, "cocoa_s: Core_CloseAudio: AudioOutputUnitStop failed");
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return;
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}
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/* Remove the input callback */
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callback.inputProc = 0;
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callback.inputProcRefCon = 0;
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if (AudioUnitSetProperty(_outputAudioUnit, kAudioUnitProperty_SetInputCallback, kAudioUnitScope_Input, 0, &callback, sizeof(callback)) != noErr) {
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DEBUG(driver, 0, "cocoa_s: Core_CloseAudio: AudioUnitSetProperty (kAudioUnitProperty_SetInputCallback) failed");
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return;
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}
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if (CloseComponent(_outputAudioUnit) != noErr) {
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DEBUG(driver, 0, "cocoa_s: Core_CloseAudio: CloseComponent failed");
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return;
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}
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}
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#endif /* WITH_COCOA */
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