【发布时间】：2018-05-08 07:34:48
【问题描述】：
我花了很长时间试图弄清楚如何使用音频单元从用户麦克风获取声音，以便我可以在音频单元录制回调中使用它，但我仍然处于堆栈状态。
- (OSStatus) setupMicInput {
AudioObjectPropertyAddress addr;
UInt32 size = sizeof(AudioDeviceID);
AudioDeviceID deviceID = 0;
addr.mSelector = kAudioHardwarePropertyDefaultInputDevice;
addr.mScope = kAudioObjectPropertyScopeGlobal;
addr.mElement = kAudioObjectPropertyElementMaster;
OSStatus err = AudioObjectGetPropertyData(kAudioObjectSystemObject, &addr, 0, NULL, &size, &deviceID);
checkStatus(err);
if (err == noErr) {
err = AudioUnitSetProperty(audioUnit, kAudioOutputUnitProperty_CurrentDevice, kAudioUnitScope_Global, 0, &deviceID, size);
}
checkStatus(err);
return err;
}
我确实收到了这个错误
2018-05-08 10:07:29.454485+0300 OsxSocketSound[1414:20839] [AudioHAL_Client] AudioHardware.cpp:578:AudioObjectGetPropertyDataSize: AudioObjectGetPropertyDataSize: no object with given ID 0
2018-05-08 10:07:29.454517+0300 OsxSocketSound[1414:20839]
[AudioHAL_Client] AudioHardware.cpp:666:AudioObjectGetPropertyData: AudioObjectGetPropertyData: no object with given ID 0
2018-05-08 10:07:29.454715+0300 OsxSocketSound[1414:20839]
[AudioHAL_Client] AudioHardware.cpp:3446:AudioDeviceSetProperty: AudioDeviceSetProperty: no device with given ID
2018-05-08 10:07:29.454738+0300 OsxSocketSound[1414:20839] 1610: ca_verify_noerr: [AudioDeviceSetProperty(mDeviceID, NULL, 0, isInput, kAudioDevicePropertyIOProcStreamUsage, theSize, theStreamUsage), 560227702].
我希望有人可以帮助我提供音频单元和捕获麦克风输入的示例。谢谢
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