Can't have AudioServer properly get the list of available formats
Can't have AudioServer properly get the list of available formats
- Subject: Can't have AudioServer properly get the list of available formats
- From: Eric Gorouben <email@hidden>
- Date: Tue, 12 Mar 2013 19:44:13 +0100
Hi,
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?
Thanks!
Eric
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