Added fileduration and filesize functions

util.h

@@ -13,6 +13,8 @@ char *mprintf(const char *fmt, ...);
 
 void *xmalloc(size_t size);
 char *hashfile(char *path);
+double fileduration(char *path);
+size_t filesize(char *path);
 
 /* JSON av parsing */
 void parse_dict(AVDictionary **d, char *s);

util/fileduration.c

+#include <libavformat/avformat.h>
+
+#include "../util.h"
+
+double fileduration(char *path)
+{
+	double res;
+	AVFormatContext *demux;
+	demux = 0;
+	if (avformat_open_input(&demux, path, 0, 0) < 0)
+		return 0;
+	avformat_find_stream_info(demux, 0);
+	res = demux->duration*av_q2d(AV_TIME_BASE_Q);
+	avformat_close_input(&demux);
+	return res;
+}

util/filesize.c

+#include <unistd.h>
+#include <sys/stat.h>
+
+#include "../util.h"
+
+size_t filesize(char *path)
+{
+	struct stat s;
+	if (stat(path, &s))
+		return 0;
+	return s.st_size;
+}