mqadec: update to new bluos api

mqadec.c

@@ -79,7 +79,7 @@ static int get_samples(int frame_size, uint8_t **samples, int eof, int *end)
 
 	*samples = &buf[buf_pos];
 
-	return size;
+	return size / frame_size;
 }
 
 static void consume(int len)
@@ -92,12 +92,10 @@ static size_t write_samples(void *p, void *buf, size_t len)
 	int32_t *s = buf;
 	int i;
 
-	len &= ~7;
-
-	for (i = 0; i < len / 4; i++)
+	for (i = 0; i < len * 2; i++)
 		s[i] <<= 8;
 
-	return sf_writef_int(outfile, s, len / 8) * 8;
+	return sf_writef_int(outfile, s, len);
 }
 
 static int write_size(void *p)