QMFAnalysis 88 libavcodec/aptx.h QMFAnalysis qmf; QMFAnalysis 55 libavcodec/aptxdec.c static void aptx_qmf_tree_synthesis(QMFAnalysis *qmf, QMFAnalysis 57 libavcodec/aptxenc.c static void aptx_qmf_tree_analysis(QMFAnalysis *qmf,