mirror of
https://github.com/lucannez64/darling-lol.git
synced 2026-10-26 19:47:42 +00:00
76 lines
3.9 KiB
C++
76 lines
3.9 KiB
C++
#include <AudioToolbox/AudioUnit.h>
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#include <CoreAudio/AudioHardware.h>
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#include <atomic>
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#include <cstdio>
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#include <cstring>
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#include <unistd.h>
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static std::atomic<unsigned> callbacks{0}, badBuffers{0}, maxFrames{0};
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static unsigned phase;
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static OSStatus render(void*,AudioUnitRenderActionFlags*,const AudioTimeStamp*,
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UInt32,UInt32 frames,AudioBufferList* buffers) {
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if(!buffers || buffers->mNumberBuffers!=2) {++badBuffers;return -1;}
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for(unsigned b=0;b<2;++b) {
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if(buffers->mBuffers[b].mNumberChannels!=1 ||
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buffers->mBuffers[b].mDataByteSize<frames*sizeof(float)) {++badBuffers;return -1;}
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auto* samples=(float*)buffers->mBuffers[b].mData;
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for(unsigned i=0;i<frames;++i) samples[i]=((phase+i)%100<50?.005f:-.005f);
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}
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phase+=frames;
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if(frames>maxFrames) maxFrames=frames;
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++callbacks;
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return noErr;
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}
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int main() {
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AudioComponentDescription description={kAudioUnitType_Output,kAudioUnitSubType_HALOutput,
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kAudioUnitManufacturer_Apple,0,0};
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AudioComponent component=AudioComponentFindNext(nullptr,&description);
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printf("AUDIO_UNIT available=%d\n",component!=nullptr);fflush(stdout);
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if(!component) return 1;
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AudioComponentInstance unit=nullptr;
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OSStatus status=AudioComponentInstanceNew(component,&unit);
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if(status || !unit) return 2;
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UInt32 output=0xdeadbeef,size=sizeof(output);
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status=AudioUnitGetProperty(unit,kAudioOutputUnitProperty_EnableIO,kAudioUnitScope_Output,0,&output,&size);
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printf("AUDIO_UNIT_OUTPUT status=%d enabled=%u\n",status,output);fflush(stdout);
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if(status || output!=1) return 3;
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AudioChannelLayout layout={};size=sizeof(layout);
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status=AudioUnitGetProperty(unit,kAudioUnitProperty_AudioChannelLayout,kAudioUnitScope_Output,0,&layout,&size);
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printf("AUDIO_UNIT_LAYOUT status=%d stereo=%d\n",status,layout.mChannelLayoutTag==kAudioChannelLayoutTag_Stereo);fflush(stdout);
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if(status || layout.mChannelLayoutTag!=kAudioChannelLayoutTag_Stereo) return 9;
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AudioStreamBasicDescription format={44100,kAudioFormatLinearPCM,
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kAudioFormatFlagIsFloat|kAudioFormatFlagIsPacked|kAudioFormatFlagIsNonInterleaved,4,1,4,2,32,0};
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status=AudioUnitSetProperty(unit,kAudioUnitProperty_StreamFormat,kAudioUnitScope_Input,0,&format,sizeof(format));
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printf("AUDIO_UNIT_CONFIGURE status=%d before_initialization=1\n",status);fflush(stdout);
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if(status) return 4;
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AURenderCallbackStruct callback={render,nullptr};
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status=AudioUnitSetProperty(unit,kAudioUnitProperty_SetRenderCallback,kAudioUnitScope_Input,0,&callback,sizeof(callback));
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if(status) return 5;
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UInt32 frames=256;
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status=AudioUnitSetProperty(unit,kAudioDevicePropertyBufferFrameSize,kAudioUnitScope_Global,0,&frames,sizeof(frames));
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if(status) return 6;
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status=AudioUnitInitialize(unit);
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printf("AUDIO_UNIT_INITIALIZE status=%d\n",status);fflush(stdout);
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if(status) return 7;
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status=AudioOutputUnitStart(unit);
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printf("AUDIO_UNIT_START status=%d\n",status);fflush(stdout);
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if(status) return 8;
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for(unsigned i=0;i<150;++i) usleep(20000);
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status=AudioOutputUnitStop(unit);
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printf("AUDIO_UNIT_RENDER callbacks=%u bad_buffers=%u max_frames=%u stop_status=%d\n",
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(unsigned)callbacks,(unsigned)badBuffers,(unsigned)maxFrames,status);fflush(stdout);
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for(unsigned cycle=0;cycle<2 && !status;cycle++) {
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unsigned before=callbacks;
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status=AudioOutputUnitStart(unit);
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for(unsigned i=0;i<50 && !status;++i) usleep(20000);
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OSStatus stopped=AudioOutputUnitStop(unit);
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printf("AUDIO_UNIT_RESTART cycle=%u start_status=%d stop_status=%d callbacks=%u\n",cycle+1,status,stopped,(unsigned)callbacks-before);fflush(stdout);
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if(!status) status=stopped;
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if(!status && callbacks==before) status=-1;
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}
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AudioUnitUninitialize(unit);
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AudioComponentInstanceDispose(unit);
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return status || !callbacks || badBuffers || maxFrames>frames;
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}
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