AC3ENC_TYPE        36 libavcodec/ac3enc_fixed.c #define AC3ENC_TYPE AC3ENC_TYPE_AC3_FIXED
AC3ENC_TYPE        37 libavcodec/ac3enc_float.c #define AC3ENC_TYPE AC3ENC_TYPE_AC3
AC3ENC_TYPE        35 libavcodec/eac3enc.c #define AC3ENC_TYPE AC3ENC_TYPE_EAC3