IEC61937_MPEG2_LAYER2_LSF 72 libavformat/spdifdec.c case IEC61937_MPEG2_LAYER2_LSF: IEC61937_MPEG2_LAYER2_LSF 322 libavformat/spdifenc.c { IEC61937_MPEG2_LAYER1_LSF, IEC61937_MPEG2_LAYER2_LSF, IEC61937_MPEG2_LAYER3_LSF },//MPEG2 LSF