+#define AV_CH_TOP_SIDE_LEFT 0x0000001000000000ULL
+#define AV_CH_TOP_SIDE_RIGHT 0x0000002000000000ULL
+#define AV_CH_BOTTOM_FRONT_CENTER 0x0000004000000000ULL
+#define AV_CH_BOTTOM_FRONT_LEFT 0x0000008000000000ULL
+#define AV_CH_BOTTOM_FRONT_RIGHT 0x0000010000000000ULL