Does nothing fancy but still sounds very decent at 128kbps. Still room to improve by bringing in the low pass and PNS management from the main big twoloop which should improve its quality but not sacrifice that much speed.
c92cc2d aacenc: add a faster version of twoloop as the "fast" coder
libavcodec/aaccoder.c | 154 ++++++++++++++++++++++++++++++++++++++++++-------
1 file changed, 134 insertions(+), 20 deletions(-)