Minimal CoreAudio line in example
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#include <CoreAudio/CoreAudio.h> | |
#include <AudioToolbox/AudioToolbox.h> | |
#include <iostream> | |
static const int kNumberBuffers = 3; | |
static const int kBufferByteSize = 8192; | |
void callback (void *userData, AudioQueueRef queue, AudioQueueBufferRef buffer, const AudioTimeStamp *startTime, UInt32 inumberPacketDescriptions, const AudioStreamPacketDescription *packetDescs) { | |
OSStatus status; | |
std::cout << buffer->mAudioDataBytesCapacity << std::endl; | |
status = AudioQueueEnqueueBuffer(queue, buffer, 0, nullptr); | |
if (status != 0) exit(5); | |
} | |
int main() { | |
OSStatus status; | |
AudioStreamBasicDescription desc; | |
desc.mSampleRate = 44100; | |
desc.mFormatID = kAudioFormatLinearPCM; | |
desc.mFormatFlags = kAudioFormatFlagIsSignedInteger; | |
desc.mBytesPerPacket = 0; | |
desc.mFramesPerPacket = 1; | |
desc.mBytesPerFrame = 0; | |
desc.mChannelsPerFrame = 2; | |
desc.mBitsPerChannel = 16; | |
desc.mReserved = 0; | |
AudioQueueRef queue; | |
status = AudioQueueNewInput(&desc, callback, nullptr, nullptr, nullptr, 0, &queue); | |
if (status != 0) return 1; | |
status = AudioQueueStart(queue, nullptr); | |
if (status != 0) return 2; | |
for (int i = 0; i < kNumberBuffers; ++i) { | |
AudioQueueBufferRef buffer; | |
status = AudioQueueAllocateBuffer(queue, kBufferByteSize, &buffer); | |
if (status != 0) return 3; | |
status = AudioQueueEnqueueBuffer(queue, buffer, 0, nullptr); | |
if (status != 0) return 4; | |
} | |
getchar(); | |
return 0; | |
} |
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line-in: | |
clang++ darwin.cc -framework AudioToolBox -framework CoreFoundation -o line-in |
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This gives [aqme] 318: error -66680 finding/initializing AQDefaultInput