From 4973beef6d094ea0d43bd1a3b1d5ce6b9c18d2f6 Mon Sep 17 00:00:00 2001
From: Jan Klemkow <j.klemkow@wemelug.de>
Date: Sat, 2 Feb 2013 03:48:42 +0100
Subject: add tool to recognize a cut inside a video

---
 src/findcut.c | 88 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 src/findcut.c

diff --git a/src/findcut.c b/src/findcut.c
new file mode 100644
index 0000000..2b2bc71
--- /dev/null
+++ b/src/findcut.c
@@ -0,0 +1,88 @@
+#define _XOPEN_SOURCE 500
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+
+#include "video_decode.h"
+#include "util.h"
+
+static void
+usage(void)
+{
+	fprintf(stderr, "findcut [-dh] [-t THRESHOLD] VIDEO CUT\n"
+			"\n"
+			"OPTIONS\n"
+			"\t-d\tprint diff for every frame\n"
+			"\t-h\tprint this help message\n"
+			"\t-t\tthreshold matching\n"
+			"\t-T\tprint timestamp of every frame\n");
+
+	exit(EXIT_FAILURE);
+}
+
+int
+main(int argc, char **argv)
+{
+	struct video_decode *video_vd;
+	struct video_decode *cut_vd;
+	struct video_frame *cur_frame = NULL, *cut_frame = NULL;
+	int ret, ch;
+	int diff_flag = 0, time_flag = 0;
+	int64_t timestamp = 0;
+	int64_t threshold = 10;
+	double diff = 0.0;
+
+	while ((ch = getopt(argc, argv, "dtTh")) != -1) {
+		switch (ch) {
+		case 'd':
+			diff_flag = 1;	/* print diff of every frame */
+			break;
+		case 't':
+			threshold = strtol(optarg, NULL, 10);
+			break;
+		case 'T':
+			time_flag = 1;
+			break;
+		case 'h':
+		default:
+			usage();
+			/* NOTREACHED */
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
+	if (argc < 2)
+		usage();
+
+	ret = video_decode_init(&cut_vd, argv[1], timestamp);
+	if (ret < 0)
+		return -ret;
+
+	/* just get first frame of the cut */
+	video_decode_get_frame(cut_vd, &cut_frame);
+
+	ret = video_decode_init(&video_vd, argv[0], timestamp);
+	if (ret < 0)
+		return -ret;
+
+	for (int i = 0; video_decode_get_frame(video_vd, &cur_frame) > 0; ++i) {
+		diff = frame_diff(cut_frame, cur_frame);
+
+		if (diff <= threshold || diff_flag) {
+			if (time_flag)
+				printf("%lld", cur_frame->dts);
+			else
+				print_time(cur_frame->dts);
+
+			printf(" %f\n", diff);
+		}
+	}
+
+	video_decode_free_frame(&cur_frame);
+	video_decode_free_frame(&cut_frame);
+	video_decode_uninit(&video_vd);
+	video_decode_uninit(&cut_vd);
+	return EXIT_SUCCESS;
+}
-- 
cgit