From 501123a96ac448ddb8062be7b7f94d566c8942da Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mathias=20Panzenb=C3=B6ck?= <grosser.meister.morti@gmx.net>
Date: Fri, 7 Aug 2015 21:52:27 +0200
Subject: [PATCH] forgot to add xmidi.h and xmidi.c

---
 src/xmidi.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/xmidi.h | 35 ++++++++++++++++++++++++++++
 2 files changed, 101 insertions(+)
 create mode 100644 src/xmidi.c
 create mode 100644 src/xmidi.h

diff --git a/src/xmidi.c b/src/xmidi.c
new file mode 100644
index 0000000..9952102
--- /dev/null
+++ b/src/xmidi.c
@@ -0,0 +1,66 @@
+/* Copyright (c) 2015 Mathias Panzenböck
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <stdint.h>
+
+#include "aiff.h"
+#include "xmidi.h"
+
+int xmidi_isfile(const uint8_t *data, size_t input_len, struct file_info *info)
+{
+	size_t length = 0;
+
+	if (input_len < XMIDI_MIN_SIZE)
+		return 0;
+
+	if (MAGIC(data) == FORM_MAGIC) {
+		length = be32toh(*(const uint32_t *)(data + 4));
+		if (SIZE_MAX - 8 < length || MAGIC(data + 8) != XDIR_MAGIC)
+			return 0;
+		length += 8;
+	}
+
+	if (input_len < length || input_len - length < XMIDI_MIN_SIZE)
+		return 0;
+
+	if (MAGIC(data + length) != CAT_MAGIC || MAGIC(data + length + 8) != XMID_MAGIC)
+		return 0;
+	
+	size_t cat_length = be32toh(*(const uint32_t *)(data + length + 4));
+
+	if (SIZE_MAX - 8 < cat_length)
+		return 0;
+
+	cat_length += 8;
+
+	if (SIZE_MAX - length < cat_length)
+		return 0;
+
+	length += cat_length;
+
+	if (info)
+	{
+		info->length = length;
+		info->ext    = "xmid";
+	}
+
+	return 1;
+}
diff --git a/src/xmidi.h b/src/xmidi.h
new file mode 100644
index 0000000..1be9702
--- /dev/null
+++ b/src/xmidi.h
@@ -0,0 +1,35 @@
+/* Copyright (c) 2015 Mathias Panzenböck
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MEDIAEXTRACT_XMIDI_H__
+#define MEDIAEXTRACT_XMIDI_H__
+
+#include "mediaextract.h"
+
+#define XDIR_MAGIC MAGIC("XDIR")
+#define CAT_MAGIC  MAGIC("CAT ")
+#define XMID_MAGIC MAGIC("XMID")
+
+#define XMIDI_MIN_SIZE 12
+
+int xmidi_isfile(const uint8_t *data, size_t input_len, struct file_info *info);
+
+#endif /* MEDIAEXTRACT_XMIDI_H__ */