Re: AudioUnitRender returning -10863 if no input device is present
Re: AudioUnitRender returning -10863 if no input device is present
- Subject: Re: AudioUnitRender returning -10863 if no input device is present
- From: Andrew Smith <email@hidden>
- Date: Wed, 21 Oct 2009 09:11:58 -0600
I'm still not getting this to work. I removed the kAudioOutputUnitProperty_EnableIO enable input, but I still get the same errors in the callback. I also tried explicitly disabling the input, no luck.
Here is my setupRemoteIO code:
// Open the output unit
AudioComponentDescription desc;
desc.componentType = kAudioUnitType_Output;
desc.componentSubType = kAudioUnitSubType_RemoteIO;
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
desc.componentFlags = 0;
desc.componentFlagsMask = 0;
AudioComponent comp = AudioComponentFindNext(NULL, &desc);
XThrowIfError(AudioComponentInstanceNew(comp, &inRemoteIOUnit), "couldn't open the remote I/O unit");
UInt32 one = 1;
// XThrowIfError(AudioUnitSetProperty(inRemoteIOUnit, kAudioOutputUnitProperty_EnableIO, kAudioUnitScope_Input, 1, &one, sizeof(one)), "couldn't enable input on the remote I/O unit");
XThrowIfError(AudioUnitSetProperty(inRemoteIOUnit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0, &inRenderProc, sizeof(inRenderProc)), "couldn't set remote i/o render callback");
UInt32 size = sizeof(outFormat);
XThrowIfError(AudioUnitGetProperty(inRemoteIOUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &outFormat, &size), "couldn't get the remote I/O unit's output client format");
outFormat.mSampleRate= auSampleRate;
outFormat.mFormatID= kAudioFormatLinearPCM;
outFormat.mFormatFlags= kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked;
outFormat.mFramesPerPacket= 1;
outFormat.mChannelsPerFrame= 2;
outFormat.mBitsPerChannel= 16;
outFormat.mBytesPerPacket= 4;
outFormat.mBytesPerFrame= 4;
XThrowIfError(AudioUnitSetProperty(inRemoteIOUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &outFormat, sizeof(outFormat)), "couldn't set the remote I/O unit's input client format");
XThrowIfError(AudioUnitSetProperty(inRemoteIOUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output, 1, &outFormat, sizeof(outFormat)), "couldn't set the remote I/O unit's input client format");
XThrowIfError(AudioUnitInitialize(inRemoteIOUnit), "couldn't initialize the remote I/O unit");
// NSLog(@"AudioUnitInitialize succeeds");
On Thursday, October 15, 2009, at 11:47AM, "Doug Wyatt" <email@hidden> wrote:
>When there's no input device present, you have to disable the input
>side of AURemoteIO via kAudioOutputUnitProperty_EnableIO. If the mic
>availability changes on a Touch and you want to change the enabledness
>of input on a unit you've already initialized, you'll hit an issue --
>avoid it by disposing the AURemoteIO and creating a new one.
>
>Doug
>
>On Oct 14, 2009, at 20:11 , Andrew Smith wrote:
>> Hi
>>
>> In my audio processing tools I normally use a RemoteIO setup that
>> lets me read in the input buffer, and stuff in values that end up in
>> the audio output. I do have one output-only function, but if it's on
>> a Touch with no mic plugged in, my performThru functions gest -10863
>> when it calls AudioUnitRender.
>>
>> Is there any way that I can still get my data into the output
>> without an input device being present?
>>
>> thanks!
>> Andrew Smith
>
>
>
>
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