• Rostislav Pehlivanov's avatar
    Implement a new rate control system · 002e7b7a
    Rostislav Pehlivanov authored
    This commit implements a new rate control system which was ported from
    Daala's rate control system (which was based off of Theora's rate
    control system) to the encoder. Its aim is to address the weaknesses of
    the current rate control system and eventually serve as its replacement.
    
    This is still work in progress. So far this commit only implements
    support for single pass encoding for constant quality and bitrate
    targeting.
    Additional commits which implement two-pass support and the rest to
    match the feature set of the current rate control system are coming
    soon.
    
    The rate control system hasn't been fully tuned (and will likely need
    additional tuning as the encoder's development progresses) and does
    contain some "hacks", to convert the quality to a quantizer value
    (empirical) and to tweak the quantizer in between golden frames (which
    uses some code from the current rate control system as well as code
    which attempts to model what that code does), the latter of which is
    only in the constant quality codepath.
    
    Bitrate targeting works much better than the current rate control
    system's targeting and will actually closely match the rate specified by
    the user without the current rate control system's bursty behaviour.
    
    Change-Id: I588fbfd2e80a3d21ce7176903115d6a96ef1700a
    002e7b7a
av1_cx_iface.c 53.9 KB