1 files changed, 70 insertions, 0 deletions
diff --git a/src/ExifImageMetaData.cxx b/src/ExifImageMetaData.cxx
new file mode 100644
index 0000000..05a43d5
--- /dev/null
+++ b/src/ExifImageMetaData.cxx
@@ -0,0 +1,70 @@
+// 
+// Copyright 2006 by Johannes Hofmann
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library 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
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+// USA.
+//
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/wait.h>
+
+#include "util.h"
+
+#include "ExifImageMetaData.H"
+
+#define FOCAL_LENGTH_IN_35MM_FILM 0xa405
+
+int
+ExifImageMetaData::load_image(char *name) {
+	char * args[32];
+	FILE *p;
+	pid_t pid;
+	int status;
+	char buf[1024];
+	char val[1024];
+	int id;
+
+	args[0] = "exif";
+	args[1] = "-i";
+	args[2] = "-m";
+	args[3] = name;
+	args[4] = NULL;
+  
+	p = pexecvp(args[0], args, &pid, "r");
+
+	if (p) {
+		while (fgets(buf, sizeof(buf), p) != NULL) {
+			if (sscanf(buf, "%d\t%s", &id, val) != 2) {
+				continue;
+			}
+	
+			switch(id) {
+				case FOCAL_LENGTH_IN_35MM_FILM:
+					focallength_sensor_ratio = atof(val) / 35;
+					break;
+			}	
+		}
+	}
+
+	fclose(p);
+	waitpid(pid, &status, 0); 
+	if (WEXITSTATUS(status) == 127 || WEXITSTATUS(status) == 126) {
+		fprintf(stderr, "%s not found\n", args[0]);
+	}
+
+	return 0;
+}
+