IEC61937_MPEG1_LAYER23 54 libavformat/spdifdec.c case IEC61937_MPEG1_LAYER23: IEC61937_MPEG1_LAYER23 329 libavformat/spdifenc.c { IEC61937_MPEG1_LAYER1, IEC61937_MPEG1_LAYER23, IEC61937_MPEG1_LAYER23 }, // MPEG-1