From 588017b4072f7e3163c1bb272c72dbc8792c8120 Mon Sep 17 00:00:00 2001
From: "Joseph Jezak josejx@gentoo.org" <josejx@gentoo.org>
Date: Fri, 4 Apr 2014 23:56:43 -0400
Subject: [PATCH] FIXBIK: Add fixbik, small utility to trim headers off EMI
 movies.

---
 tools/fixbik.cpp | 104 +++++++++++++++++++++++++++++++++++++++++++++++
 tools/module.mk  |   7 +++-
 2 files changed, 110 insertions(+), 1 deletion(-)
 create mode 100644 tools/fixbik.cpp

diff --git a/tools/fixbik.cpp b/tools/fixbik.cpp
new file mode 100644
index 0000000..bc78878
--- /dev/null
+++ b/tools/fixbik.cpp
@@ -0,0 +1,104 @@
+/* ResidualVM - A 3D game interpreter
+ *
+ * ResidualVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+
+// The movies included with EMI have a SMUSH header, but will play fine in
+// mplayer without it. This simple utility just takes off the header.
+
+#define BUF_SZ 0x2000
+int main(int argc, char **argv) {
+	FILE *rfd, *wfd;
+	uint32_t consumed = 0;
+	uint32_t i = 0;
+	unsigned char buf[BUF_SZ];
+	uint32_t bik_start = 0;
+
+	if (argc != 3) {
+		printf("Usage:\n\tfix_bik <Movie File> <Output File>\n");
+		return -1;
+	}
+
+	// Clear the buffer memory
+	memset(buf, 0, BUF_SZ);
+
+	// Open the files
+	rfd = fopen(argv[1], "r");
+	if (!rfd) {
+		printf("Unable to open the movie file: %s\n", argv[1]);
+		return -1;
+	}
+	wfd = fopen(argv[2], "w");
+	if (!rfd) {
+		printf("Unable to open the output file for writing: %s\n", argv[2]);
+		return -1;
+	}
+
+	// Read the first 5 bytes of the header
+	fread(buf, 5, 1, rfd);
+	buf[5] = 0;
+
+	// If the first 5 bytes are SMUSH, find the start of the BIK header
+	if (!strncmp((const char *)buf, "SMUSH", 5)) {
+		fread(buf, 16, 1, rfd);
+		consumed += 16;
+
+		// Decode the first part
+		for (i=0; i<consumed; i++) {
+			buf[i] ^= 0xd2;
+		}
+
+		// Get the SMUSH Header Length
+		sscanf((const char *)buf, "%u", &bik_start);
+
+		if (bik_start > BUF_SZ) {
+			printf("SMUSH Header doesn't make sense, refusing to go further\n");
+			return -1;
+		}
+	}
+
+	// Seek to the start of the BIK movie
+	fseek(rfd, bik_start, SEEK_SET);
+
+	// Read the BIK header
+	fread(buf, 3, 1, rfd);
+	buf[3] = 0;
+
+	// Sanity check to make sure we found the movie data
+	if (!strncmp((const char *)buf, "BIK", 3)) {
+		fseek(rfd, -3, SEEK_CUR);
+	} else {
+		printf("No BIK header found, possibly not a BINK file?\n");
+	}
+
+	// Read the BIK into the output file
+	while (!feof(rfd)) {
+		fread(buf, BUF_SZ, 1, rfd);
+		fwrite(buf, BUF_SZ, 1, wfd);
+	}
+
+	fclose(rfd);
+	fclose(wfd);
+	return 0;
+}
diff --git a/tools/module.mk b/tools/module.mk
index 5408fe4..0fed7c3 100644
--- a/tools/module.mk
+++ b/tools/module.mk
@@ -24,7 +24,8 @@ MAKE := \
 	patchex \
 	diffr \
 	patchr \
-	bm2bmp
+	bm2bmp \
+	fixbik
 
 # 	these below are not added because they depend on the ppm and bpm libraries
 #	mat2ppm
@@ -120,4 +121,8 @@ TOOL := bm2bmp
 TOOL_OBJS := bm2bmp.o lab.o
 include $(srcdir)/rules.mk
 
+TOOL := fixbik
+TOOL_OBJS := fixbik.o
+include $(srcdir)/rules.mk
+
 .PHONY: clean-tools tools