AudioFormat property kAudioFormatProperty_ASBDFromMPEGPacket bug fix for macOS 10.12 (Sierra) and iOS 10.0

Media Technologies Audio
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theanalogkid OP
Created Sep ’16
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The Audio Format Property Identifier 

kAudioFormatProperty_ASBDFromMPEGPacket
is documented as returning a 
AudioStreamBasicDescription
for a given MPEG Packet where the specifier is an MPEG Packet.


In versions of OS X and iOS prior to macOS 10.12 (Sierra) and iOS 10.0, the 

inSpecifier
to 
AudioFormatGetProperty()
for 
kAudioFormatProperty_ASBDFromMPEGPacket
was being interpreted as a 4-byte MPEG audio sync word passed by value, rather than what you would expect to pass to this API, a pointer to a full packet.


This issue has been fixed. Developers using this property on older systems should note this behavior change and update their code as required.

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AudioFormat property kAudioFormatProperty_ASBDFromMPEGPacket bug fix for macOS 10.12 (Sierra) and iOS 10.0
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