avfvideosrc: fix compiler warning in iOS
applemedia: atdec: fix mp3 caps
applemedia: atdec: fix aac decoding on Mavericks
atdec: Set the correct layer depending on the MP3 caps
atdec: Initialize the audio description with zeroes
atdec: Set correct number of frames for MP3
atdec: Call AudioQueueReset() for flushing

AudioQueueFlush() is for draining all remaining data.
atdec: Handle errors in handle_frame() properly
atdec: Always try to pull one decoded frame out of the queue

... instead of doing magic calculations with the buffer duration.
atdec: Keep track of the current position

It's required to set a valid sample time for decoding on iOS.
atdec: First dequeue a buffer before enqueueing anything from the queue

Required for offline rendering according to the docs. wtf.
atdec: Implement draining properly
atdec: Add some more debug output