kemono: add support

kemonoio/kemonoio.h

@@ -0,0 +1,53 @@
+#pragma once
+
+#include <windows.h>
+
+#include <stdint.h>
+
+enum {
+    KEMONO_IO_OPBTN_TEST = 0x01,
+    KEMONO_IO_OPBTN_SERVICE = 0x02
+};
+
+enum {
+    KEMONO_IO_GAMEBTN_UP = 0x01,
+    KEMONO_IO_GAMEBTN_DOWN = 0x02,
+    KEMONO_IO_GAMEBTN_LEFT = 0x04,
+    KEMONO_IO_GAMEBTN_RIGHT = 0x08,
+    KEMONO_IO_GAMEBTN_R = 0x10,
+    KEMONO_IO_GAMEBTN_G = 0x20,
+    KEMONO_IO_GAMEBTN_B = 0x40,
+    KEMONO_IO_GAMEBTN_START = 0x80
+};
+
+/* Get the version of the Kemono IO API that this DLL supports. This
+   function should return a positive 16-bit integer, where the high byte is
+   the major version and the low byte is the minor version (as defined by the
+   Semantic Versioning standard).
+
+   The latest API version as of this writing is 0x0100. */
+
+uint16_t kemono_io_get_api_version(void);
+
+/* Initialize the IO DLL. This is the second function that will be called on
+   your DLL, after kemono_io_get_api_version.
+
+   All subsequent calls to this API may originate from arbitrary threads.
+
+   Minimum API version: 0x0100 */
+
+HRESULT kemono_io_init(void);
+
+/* Send any queued outputs (of which there are currently none, though this may
+   change in subsequent API versions) and retrieve any new inputs.
+
+   Minimum API version: 0x0100 */
+
+HRESULT kemono_io_poll(uint16_t* ops, uint16_t* player);
+
+/* Read the current state of the coin counter. This value should be incremented
+   for every coin detected by the coin acceptor mechanism. This count does not
+   need to persist beyond the lifetime of the process.
+
+   Minimum API version: 0x0100 */
+void kemono_io_jvs_read_coin_counter(uint16_t *out);