peter1138@2743: /* $Id$ */
peter1138@2743: 
peter1138@2953: /*****************************************************************************
peter1138@2953:  *                             Cocoa sound driver                            *
peter1138@2953:  * Known things left to do:                                                  *
peter1138@2953:  * - Might need to do endian checking for it to work on both ppc and x86     *
peter1138@2953:  *****************************************************************************/
bjarni@2736: 
bjarni@2736: #ifdef WITH_COCOA
bjarni@2736: 
bjarni@2736: #include <AudioUnit/AudioUnit.h>
bjarni@2736: 
bjarni@2736: /* Name conflict */
peter1138@2953: #define Rect        OTTDRect
peter1138@2953: #define Point       OTTDPoint
peter1138@2953: #define WindowClass OTTDWindowClass
bjarni@2736: /* Defined in stdbool.h */
bjarni@2736: #ifndef __cplusplus
bjarni@2736: # ifndef __BEOS__
bjarni@2736: #  undef bool
bjarni@2736: #  undef false
bjarni@2736: #  undef true
bjarni@2736: # endif
bjarni@2736: #endif
bjarni@2736: 
bjarni@2736: #include "../stdafx.h"
bjarni@2736: #include "../openttd.h"
bjarni@2736: #include "../debug.h"
bjarni@2736: #include "../driver.h"
bjarni@2736: #include "../mixer.h"
bjarni@2736: #include "../sdl.h"
bjarni@2736: 
bjarni@2736: #include "cocoa_s.h"
bjarni@2736: 
bjarni@2736: #undef WindowClass
bjarni@2736: #undef Point
bjarni@2736: #undef Rect
bjarni@2736: 
bjarni@2736: 
bjarni@2736: static AudioUnit _outputAudioUnit;
bjarni@2736: 
bjarni@2736: /* The CoreAudio callback */
peter1138@2953: static OSStatus audioCallback(void *inRefCon, AudioUnitRenderActionFlags inActionFlags, const AudioTimeStamp *inTimeStamp, UInt32 inBusNumber, AudioBuffer *ioData)
bjarni@2736: {
tron@2977: 	MxMixSamples(ioData->mData, ioData->mDataByteSize / 4);
bjarni@2736: 
bjarni@2736: 	return noErr;
bjarni@2736: }
bjarni@2736: 
bjarni@2736: 
bjarni@2736: static const char *CocoaSoundStart(const char * const *parm)
bjarni@2736: {
bjarni@2736: 	Component comp;
bjarni@2736: 	ComponentDescription desc;
bjarni@2736: 	struct AudioUnitInputCallback callback;
bjarni@2736: 	AudioStreamBasicDescription requestedDesc;
bjarni@2736: 
bjarni@2736: 	DEBUG(driver, 1)("cocoa_s: CocoaSoundStart");
bjarni@2736: 
bjarni@2736: 	/* Setup a AudioStreamBasicDescription with the requested format */
bjarni@2736: 	requestedDesc.mFormatID = kAudioFormatLinearPCM;
bjarni@2736: 	requestedDesc.mFormatFlags = kLinearPCMFormatFlagIsPacked;
bjarni@2736: 	requestedDesc.mChannelsPerFrame = 2;
bjarni@2736: 	requestedDesc.mSampleRate = GetDriverParamInt(parm, "hz", 11025);
bjarni@2736: 
bjarni@2736: 	requestedDesc.mBitsPerChannel = 16;
bjarni@2736: 	requestedDesc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
bjarni@2837: 
bjarni@2837: #ifdef TTD_BIG_ENDIAN
bjarni@2736: 	requestedDesc.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian;
bjarni@2736: #endif
bjarni@2736: 
bjarni@2736: 	requestedDesc.mFramesPerPacket = 1;
bjarni@2736: 	requestedDesc.mBytesPerFrame = requestedDesc.mBitsPerChannel * requestedDesc.mChannelsPerFrame / 8;
bjarni@2736: 	requestedDesc.mBytesPerPacket = requestedDesc.mBytesPerFrame * requestedDesc.mFramesPerPacket;
bjarni@2736: 
bjarni@2736: 
bjarni@2736: 	/* Locate the default output audio unit */
bjarni@2736: 	desc.componentType = kAudioUnitComponentType;
bjarni@2736: 	desc.componentSubType = kAudioUnitSubType_Output;
bjarni@2736: 	desc.componentManufacturer = kAudioUnitID_DefaultOutput;
bjarni@2736: 	desc.componentFlags = 0;
bjarni@2736: 	desc.componentFlagsMask = 0;
bjarni@2736: 
bjarni@2736: 	comp = FindNextComponent (NULL, &desc);
bjarni@2736: 	if (comp == NULL)
bjarni@2736: 		return "cocoa_s: Failed to start CoreAudio: FindNextComponent returned NULL";
bjarni@2736: 
bjarni@2736: 	/* Open & initialize the default output audio unit */
peter1138@2953: 	if (OpenAComponent(comp, &_outputAudioUnit) != noErr)
bjarni@2736: 		return "cocoa_s: Failed to start CoreAudio: OpenAComponent";
bjarni@2736: 
peter1138@2953: 	if (AudioUnitInitialize(_outputAudioUnit) != noErr)
bjarni@2736: 		return "cocoa_s: Failed to start CoreAudio: AudioUnitInitialize";
bjarni@2736: 
bjarni@2736: 	/* Set the input format of the audio unit. */
peter1138@2953: 	if (AudioUnitSetProperty(_outputAudioUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &requestedDesc, sizeof(requestedDesc)) != noErr)
peter1138@2953: 		return "cocoa_s: Failed to start CoreAudio: AudioUnitSetProperty (kAudioUnitProperty_StreamFormat)";
bjarni@2736: 
bjarni@2736: 	/* Set the audio callback */
bjarni@2736: 	callback.inputProc = audioCallback;
bjarni@2736: 	callback.inputProcRefCon = NULL;
peter1138@2953: 	if (AudioUnitSetProperty(_outputAudioUnit, kAudioUnitProperty_SetInputCallback, kAudioUnitScope_Input, 0, &callback, sizeof(callback)) != noErr)
bjarni@2736: 		return "cocoa_s: Failed to start CoreAudio: AudioUnitSetProperty (kAudioUnitProperty_SetInputCallback)";
bjarni@2736: 
bjarni@2736: 	/* Finally, start processing of the audio unit */
peter1138@2953: 	if (AudioOutputUnitStart(_outputAudioUnit) != noErr)
bjarni@2736: 		return "cocoa_s: Failed to start CoreAudio: AudioOutputUnitStart";
bjarni@2736: 
bjarni@2736: 	/* We're running! */
bjarni@2736: 	return NULL;
bjarni@2736: }
bjarni@2736: 
bjarni@2736: 
bjarni@2736: static void CocoaSoundStop(void)
bjarni@2736: {
bjarni@2736: 	struct AudioUnitInputCallback callback;
bjarni@2736: 
bjarni@2736: 	DEBUG(driver, 1)("cocoa_s: CocoaSoundStop");
bjarni@2736: 
bjarni@2736: 	/* stop processing the audio unit */
bjarni@2736: 	if(AudioOutputUnitStop(_outputAudioUnit) != noErr) {
bjarni@2736: 		DEBUG(driver, 1)("cocoa_s: Core_CloseAudio: AudioOutputUnitStop failed");
bjarni@2736: 		return;
bjarni@2736: 	}
bjarni@2736: 
bjarni@2736: 	/* Remove the input callback */
bjarni@2736: 	callback.inputProc = 0;
bjarni@2736: 	callback.inputProcRefCon = 0;
peter1138@2953: 	if (AudioUnitSetProperty(_outputAudioUnit, kAudioUnitProperty_SetInputCallback, kAudioUnitScope_Input, 0, &callback, sizeof(callback)) != noErr) {
bjarni@2736: 		DEBUG(driver, 1)("cocoa_s: Core_CloseAudio: AudioUnitSetProperty (kAudioUnitProperty_SetInputCallback) failed");
bjarni@2736: 		return;
bjarni@2736: 	}
bjarni@2736: 
bjarni@2736: 	if (CloseComponent(_outputAudioUnit) != noErr) {
bjarni@2736: 		DEBUG(driver, 1)("cocoa_s: Core_CloseAudio: CloseComponent failed");
bjarni@2736: 		return;
bjarni@2736: 	}
bjarni@2736: }
bjarni@2736: 
bjarni@2736: 
bjarni@2736: const HalSoundDriver _cocoa_sound_driver = {
bjarni@2736: 	CocoaSoundStart,
bjarni@2736: 	CocoaSoundStop,
bjarni@2736: };
bjarni@2736: 
bjarni@2736: #endif /* WITH_COCOA */