araw: add assertion

diff --git a/modules/codec/araw.c b/modules/codec/araw.c
index a4b0f115e9f9aeb084cd420f562916e065a83de6..0746a5eaa5bd0795474a02c9e3b16944407fc576 100644 (file)
--- a/modules/codec/araw.c
+++ b/modules/codec/araw.c
@@ -583,7 +583,7 @@ static void F64IDecode( void *outp, const uint8_t *in, unsigned samples )
     }
 }
 
-static int16_t dat12tos16( uint16_t y )
+static int16_t dat12tos16( uint_fast16_t y )
 {
     static const uint16_t diff[16] = {
        0x0000, 0x0000, 0x0100, 0x0200, 0x0300, 0x0400, 0x0500, 0x0600,
@@ -591,6 +591,8 @@ static int16_t dat12tos16( uint16_t y )
     static const uint8_t shift[16] = {
         0, 0, 1, 2, 3, 4, 5, 6, 6, 5, 4, 3, 2, 1, 0, 0 };
 
+    assert(y < 0x1000);
+
     int d = y >> 8;
     return (y - diff[d]) << shift[d];
 }