evrc coding and decoding, hope it helpful to you

evrc\code\a2lsp.c
....\....\acb_ex.c
....\....\acelp_pf.c
....\....\apf.c
....\....\auto.c
....\....\bitpack.c
....\....\bitupack.c
....\....\bl_intrp.c
....\....\bqiir.c
....\....\c3_10pf.c
....\....\c8_35pf.c
....\....\comacb.c
....\....\convh.c
....\....\cshift.c
....\....\d3_10pf.c
....\....\d8_35pf.c
....\....\data_formatchange.c
....\....\decode.c
....\....\durbin.c
....\....\d_fer.c
....\....\d_globs.c
....\....\d_no_fer.c
....\....\d_rate_1.c
....\....\encode.c
....\....\e_globs.c
....\....\fcbgq.c
....\....\fer.c
....\....\filter.c
....\....\fndppf.c
....\....\getext1k.c
....\....\getgain.c
....\....\getopt.c
....\....\getres.c
....\....\globs.c
....\....\impulser.c
....\....\interpol.c
....\....\intr_cos.c
....\....\inv_sqrt.c
....\....\lpcana.c
....\....\lsp2a.c
....\....\lspmaq.c
....\....\main.c
....\....\makefile
....\....\maxeloc.c
....\....\mdfyorig.c
....\....\mod.c
....\....\ns127.c
....\....\pit_shrp.c
....\....\pktoav.c
....\....\pre_enc.c
....\....\putacbc.c
....\....\rda.c
....\....\rom.c
....\....\r_fft.c
....\....\synfltr.c
....\....\w2res.c
....\....\weight.c
....\....\zeroinpt.c
....\dspmath\ehwutl.c
....\.......\ehwutl.h
....\.......\globdefs.c
....\.......\makefile
....\.......\mathadv.c
....\.......\mathadv.h
....\.......\mathdp31.c
....\.......\mathdp31.h
....\.......\mathevrc.c
....\.......\mathevrc.h
....\.......\typedefs.h
....\..._fx\basic_op.c
....\......\basic_op.h
....\......\basic_op40.c
....\......\basic_op40.h
....\......\lib_wmp_fx.c
....\......\lib_wmp_fx.h
....\......\makefile
....\......\math_adv.c
....\......\math_adv.h
....\......\math_adv40.c
....\......\math_adv40.h
....\......\math_ext32.c
....\......\math_ext32.h
....\......\math_ext40.c
....\......\math_ext40.h
....\......\typedef.h
....\......\typedef_fx.h
....\include\acelp_pf.h
....\.......\ansi.h
....\.......\bl_table.dat
....\.......\bqiir.h
....\.......\coder_ra.h
....\.......\costab.dat
....\.......\data_formatchange.h
....\.......\decode.h
....\.......\d_globs.h
....\.......\encode.h
....\.......\e_globs.h
....\.......\fer.h
....\.......\getopt.h
....\.......\globs.h

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