mpeg2_AAC the official reference source. Study audio friends can refer to this source.

mpeg2aac
........\aacDec
........\......\CVS
........\......\...\Entries
........\......\...\Repository
........\......\doc
........\......\...\readme_1st
........\......\...\readme_adif2mp4
........\......\...\readme_dec
........\......\...\readme_targets
........\......\makefile
........\......\makefile.cfg
........\......\makefile.cfg-example
........\......\src
........\......\...\adif2mp4.c
........\......\...\adifdec.c
........\......\...\adifdec.h
........\......\...\aiff_support.c
........\......\...\aiff_support.h
........\......\...\audioout.c
........\......\...\audioout.h
........\......\...\bitinput.c
........\......\...\bitinput.h
........\......\...\bitoutput.c
........\......\...\bitoutput.h
........\......\...\block.c
........\......\...\block.h
........\......\...\chandefs.h
........\......\...\config.c
........\......\...\config.h
........\......\...\coupling.c
........\......\...\coupling.h
........\......\...\ct_envcalc.c
........\......\...\ct_envcalc.h
........\......\...\ct_envdec.c
........\......\...\ct_envdec.h
........\......\...\ct_envextr.c
........\......\...\ct_envextr.h
........\......\...\ct_freqsca.c
........\......\...\ct_freqsca.h
........\......\...\ct_hfgen.c
........\......\...\ct_hfgen.h
........\......\...\ct_polyphase.c
........\......\...\ct_polyphase.h
........\......\...\ct_psdec.c
........\......\...\ct_psdec.h
........\......\...\ct_sbrbitb.c
........\......\...\ct_sbrbitb.h
........\......\...\ct_sbrconst.h
........\......\...\ct_sbrcrc.c
........\......\...\ct_sbrcrc.h
........\......\...\ct_sbrdec.c
........\......\...\ct_sbrdec.h
........\......\...\ct_sbrdecoder.c
........\......\...\ct_sbrdecoder.h
........\......\...\decoder.c
........\......\...\diagnose.c
........\......\...\diagnose.h
........\......\...\dolby_adapt.c
........\......\...\dolby_adapt.h
........\......\...\dolby_win.h
........\......\...\dolby_win_ssr.h
........\......\...\drc.c
........\......\...\drc.h
........\......\...\gc.c
........\......\...\gc.h
........\......\...\gc_common.c
........\......\...\gc_compensate.c
........\......\...\gc_imdct.c
........\......\...\gc_ipqf.c
........\......\...\gc_mdct_common.c
........\......\...\gc_pqf_common.c
........\......\...\gc_unpac.c
........\......\...\gc_unpac.h
........\......\...\huffdec.h
........\......\...\huffdec1.c
........\......\...\huffdec2.c
........\......\...\huffdec3.c
........\......\...\huffdec_intern.h
........\......\...\huffinit.c
........\......\...\huffinit.h
........\......\...\hufftables.c
........\......\...\hufftables.h
........\......\...\intensity.c
........\......\...\intensity.h
........\......\...\interface.h
........\......\...\intrins.c
........\......\...\intrins.h
........\......\...\monopred.c
........\......\...\monopred.h
........\......\...\stereo.c
........\......\...\stereo.h
........\......\...\tns.c
........\......\...\tns.h
........\......\...\transfo.c
........\......\...\transfo.h
........\......\win32
........\......\.....\aacdec_mc
........\......\.....\.........\aacdec_mc.dsp
........\......\.....\.........\CVS

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