CH_LAYOUT_SURROUND   94 libavcodec/audioconvert.c     case 3: return CH_LAYOUT_SURROUND;
CH_LAYOUT_SURROUND  110 libavcodec/audioconvert.c     { "surround",    3,  CH_LAYOUT_SURROUND },
CH_LAYOUT_SURROUND  380 libavcodec/avcodec.h #define CH_LAYOUT_5POINT0           (CH_LAYOUT_SURROUND|CH_SIDE_LEFT|CH_SIDE_RIGHT)
CH_LAYOUT_SURROUND  383 libavcodec/avcodec.h #define CH_LAYOUT_7POINT1_WIDE      (CH_LAYOUT_SURROUND|CH_LOW_FREQUENCY|\