cocoa_s.cpp
00001
00002
00003
00004
00005
00006
00007
00008
00009 #ifdef WITH_COCOA
00010
00011 #define MAC_OS_X_VERSION_MIN_REQUIRED MAC_OS_X_VERSION_10_3
00012 #include <AvailabilityMacros.h>
00013
00014 #include <AudioUnit/AudioUnit.h>
00015
00016
00017 #define Rect OTTDRect
00018 #define Point OTTDPoint
00019 #define WindowClass OTTDWindowClass
00020
00021 #include "../stdafx.h"
00022 #include "../debug.h"
00023 #include "../driver.h"
00024 #include "../mixer.h"
00025 #include "../core/endian_func.hpp"
00026
00027 #include "cocoa_s.h"
00028
00029 #undef WindowClass
00030 #undef Point
00031 #undef Rect
00032
00033 static FSoundDriver_Cocoa iFSoundDriver_Cocoa;
00034
00035 static AudioUnit _outputAudioUnit;
00036
00037
00038 static OSStatus audioCallback(void *inRefCon, AudioUnitRenderActionFlags *inActionFlags, const AudioTimeStamp *inTimeStamp, UInt32 inBusNumber, UInt32 inNumberFrames, AudioBufferList * ioData)
00039 {
00040 MxMixSamples(ioData->mBuffers[0].mData, ioData->mBuffers[0].mDataByteSize / 4);
00041
00042 return noErr;
00043 }
00044
00045
00046 const char *SoundDriver_Cocoa::Start(const char * const *parm)
00047 {
00048 Component comp;
00049 ComponentDescription desc;
00050 struct AURenderCallbackStruct callback;
00051 AudioStreamBasicDescription requestedDesc;
00052
00053
00054 requestedDesc.mFormatID = kAudioFormatLinearPCM;
00055 requestedDesc.mFormatFlags = kLinearPCMFormatFlagIsPacked;
00056 requestedDesc.mChannelsPerFrame = 2;
00057 requestedDesc.mSampleRate = GetDriverParamInt(parm, "hz", 11025);
00058
00059 requestedDesc.mBitsPerChannel = 16;
00060 requestedDesc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
00061
00062 #ifdef TTD_BIG_ENDIAN
00063 requestedDesc.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian;
00064 #endif
00065
00066 requestedDesc.mFramesPerPacket = 1;
00067 requestedDesc.mBytesPerFrame = requestedDesc.mBitsPerChannel * requestedDesc.mChannelsPerFrame / 8;
00068 requestedDesc.mBytesPerPacket = requestedDesc.mBytesPerFrame * requestedDesc.mFramesPerPacket;
00069
00070
00071
00072 desc.componentType = kAudioUnitType_Output;
00073 desc.componentSubType = kAudioUnitSubType_HALOutput;
00074 desc.componentManufacturer = kAudioUnitManufacturer_Apple;
00075 desc.componentFlags = 0;
00076 desc.componentFlagsMask = 0;
00077
00078 comp = FindNextComponent (NULL, &desc);
00079 if (comp == NULL) {
00080 return "cocoa_s: Failed to start CoreAudio: FindNextComponent returned NULL";
00081 }
00082
00083
00084 if (OpenAComponent(comp, &_outputAudioUnit) != noErr) {
00085 return "cocoa_s: Failed to start CoreAudio: OpenAComponent";
00086 }
00087
00088 if (AudioUnitInitialize(_outputAudioUnit) != noErr) {
00089 return "cocoa_s: Failed to start CoreAudio: AudioUnitInitialize";
00090 }
00091
00092
00093 if (AudioUnitSetProperty(_outputAudioUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &requestedDesc, sizeof(requestedDesc)) != noErr) {
00094 return "cocoa_s: Failed to start CoreAudio: AudioUnitSetProperty (kAudioUnitProperty_StreamFormat)";
00095 }
00096
00097
00098 callback.inputProc = audioCallback;
00099 callback.inputProcRefCon = NULL;
00100 if (AudioUnitSetProperty(_outputAudioUnit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0, &callback, sizeof(callback)) != noErr) {
00101 return "cocoa_s: Failed to start CoreAudio: AudioUnitSetProperty (kAudioUnitProperty_SetRenderCallback)";
00102 }
00103
00104
00105 if (AudioOutputUnitStart(_outputAudioUnit) != noErr) {
00106 return "cocoa_s: Failed to start CoreAudio: AudioOutputUnitStart";
00107 }
00108
00109
00110 return NULL;
00111 }
00112
00113
00114 void SoundDriver_Cocoa::Stop()
00115 {
00116 struct AURenderCallbackStruct callback;
00117
00118
00119 if (AudioOutputUnitStop(_outputAudioUnit) != noErr) {
00120 DEBUG(driver, 0, "cocoa_s: Core_CloseAudio: AudioOutputUnitStop failed");
00121 return;
00122 }
00123
00124
00125 callback.inputProc = 0;
00126 callback.inputProcRefCon = 0;
00127 if (AudioUnitSetProperty(_outputAudioUnit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0, &callback, sizeof(callback)) != noErr) {
00128 DEBUG(driver, 0, "cocoa_s: Core_CloseAudio: AudioUnitSetProperty (kAudioUnitProperty_SetRenderCallback) failed");
00129 return;
00130 }
00131
00132 if (CloseComponent(_outputAudioUnit) != noErr) {
00133 DEBUG(driver, 0, "cocoa_s: Core_CloseAudio: CloseComponent failed");
00134 return;
00135 }
00136 }
00137
00138 #endif