#define APU_CMD_MASK 0x10000000
#define APU_CMD_MASK_ACK (APU_CMD_MASK | 0x80000000)
+#define CX18_APU_ENCODING_METHOD_MPEG (0 << 28)
+#define CX18_APU_ENCODING_METHOD_AC3 (1 << 28)
+
+/* Description: Command APU to start audio
+ IN[0] - audio parameters (same as CX18_CPU_SET_AUDIO_PARAMETERS?)
+ IN[1] - caller buffer address, or 0
+ ReturnCode - ??? */
+#define CX18_APU_START (APU_CMD_MASK | 0x01)
+
+/* Description: Command APU to stop audio
+ IN[0] - encoding method to stop
+ ReturnCode - ??? */
+#define CX18_APU_STOP (APU_CMD_MASK | 0x02)
+
+/* Description: Command APU to reset the AI
+ ReturnCode - ??? */
#define CX18_APU_RESETAI (APU_CMD_MASK | 0x05)
/* Description: This command indicates that a Memory Descriptor List has been