altos: Provide for a pre-filter on commands

This allows for external code to see each command line before it is
processed and potentially skip it.

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/src/ao.h b/src/ao.h
index 2d2bbf82..77f3259e 100644
--- a/src/ao.h
+++ b/src/ao.h
@@ -403,6 +403,14 @@ ao_cmd_register(__code struct ao_cmds *cmds);
 void
 ao_cmd_init(void);
 
+#if HAS_CMD_FILTER
+/*
+ * Provided by an external module to filter raw command lines
+ */
+uint8_t
+ao_cmd_filter(void);
+#endif
+
 /*
  * ao_dma.c
  */