Re: Can't have AudioServer properly get the list of available formats
Re: Can't have AudioServer properly get the list of available formats
- Subject: Re: Can't have AudioServer properly get the list of available formats
- From: Jeff Moore <email@hidden>
- Date: Tue, 12 Mar 2013 11:52:27 -0700
If the 88200 format is the third format that you are returning, shouldn't the index of the array you are writing into be 2 and not 1?
--
Jeff Moore
Core Audio
Apple
On Mar 12, 2013, at 11:44 AM, Eric Gorouben <email@hidden> wrote:
> I'm implementing the kAudioStreamPropertyAvailablePhysicalFormats and kAudioStreamPropertyAvailableVirtualFormats properties. For some reason, this doesn't seem to work.
> As an experiment, I modified my source to use the SA_Plugin values (the 2 44.1 & 48k formats). No problem.
> I then modified it to have 3 formats (i.e. change the data size, and add a third format with a 88200 Hz sample rate
> if(theNumberItemsToFetch > 2)
> {
> ((AudioStreamRangedDescription*)outData)[1].mFormat.mSampleRate = 88200.0;
> ((AudioStreamRangedDescription*)outData)[1].mFormat.mFormatID = kAudioFormatLinearPCM;
> ((AudioStreamRangedDescription*)outData)[1].mFormat.mFormatFlags = kAudioFormatFlagIsSignedInteger | kAudioFormatFlagsNativeEndian | kAudioFormatFlagIsPacked;
> ((AudioStreamRangedDescription*)outData)[1].mFormat.mBytesPerPacket = 4;
> ((AudioStreamRangedDescription*)outData)[1].mFormat.mFramesPerPacket = 1;
> ((AudioStreamRangedDescription*)outData)[1].mFormat.mBytesPerFrame = 4;
> ((AudioStreamRangedDescription*)outData)[1].mFormat.mChannelsPerFrame = 2;
> ((AudioStreamRangedDescription*)outData)[1].mFormat.mBitsPerChannel = 16;
> ((AudioStreamRangedDescription*)outData)[1].mSampleRateRange.mMinimum = 88200.0;
> ((AudioStreamRangedDescription*)outData)[1].mSampleRateRange.mMaximum = 88200.0;
> }
>
> ).
> I get completely wrong results and AudioServer seems lost and gives the applications inconsistent values.
> I'm stuck on this problem. What did I miss?
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