• Fergus Simpson's avatar
    resize-refactor: Change resizing process with helpers · fecb2abc
    Fergus Simpson authored
    Adds three new helpers and changes one other. The intention of this is
    to make the triggering and function of resizing simpler. The new process
    is to resize to the next state and then update the current state to
    match. The new helpers reflect this change and make the overall flow
    simpler.
    
    resize_pending is now a helper instead of a member, so it doesn't need
    to be raised manually. A resize is pending when the numerator or
    denominator of the next resize state is different from the current one.
    resize_pending could be 1 (scale down), 0 (no change), or -1 (return to
    original resolution if 1-pass CBR), but now it can only be 1 or 0. To
    return to the original resolution just set the scale to 1:1. This
    reduces complexity with no change in functionality.
    
    resize_unscaled just returns 1 if the current numerator and denominator
    are equal. This makes some if conditions cleaner.
    
    resize_step makes the current scale equal to the next scale. This
    signifies that a resize is complete and will cause resize_pending to be
    false until the next state is changed. This is the end of the new
    resizing procedure.
    
    av1_calculate_coded_size has been changed to calculate the next size
    instead of the current size. The current state can't be updated until
    the resize is complete because if it were, the resize_pending state
    would drop and the resize wouldn't finish. This just means the next
    resolution is the target resolution until the resize is complete.
    
    Change-Id: I5d5855cc83f532d3a8b1f8853ba70a0d43221fbf
    fecb2abc
encoder.h 26.6 KB