Also put frame_average into util

Not yet needed by other tools than cuttime,
but its really just a utility function.

3 files changed, 23 insertions, 19 deletions

diff --git a/src/cuttime.c b/src/cuttime.c
index 422e4be..4b1a494 100644
--- a/src/cuttime.c
+++ b/src/cuttime.c
@@ -18,25 +18,6 @@ start_new_szene(int64_t prev_szene_end, int64_t start)
 	prev_dts_start = start;
 }
 
-static double
-frame_average(struct video_frame *frame)
-{
-	double average = 0;
-	uint8_t *row = frame->data;
-	uint8_t *col = NULL;
-
-	for (int y = 0; y < frame->height; ++y) {
-		col = row;
-		for (int x = 0; x < frame->width; ++x) {
-			average += *col;
-			col++;
-		}
-		row += frame->stride;
-	}
-
-	return average / (frame->width * frame->height);
-}
-
 static void
 usage(void)
 {
diff --git a/src/util.c b/src/util.c
index e642762..ddd46d3 100644
--- a/src/util.c
+++ b/src/util.c
@@ -103,6 +103,26 @@ frame_diff(struct video_frame *frame_a, struct video_frame *frame_b)
 	return average / (frame_a->width * frame_a->height);
 }
 
+double
+frame_average(struct video_frame *frame)
+{
+	double average = 0;
+	uint8_t *row = frame->data;
+	uint8_t *col = NULL;
+
+	for (int y = 0; y < frame->height; ++y) {
+		col = row;
+		for (int x = 0; x < frame->width; ++x) {
+			average += *col;
+			col++;
+		}
+		row += frame->stride;
+	}
+
+	return average / (frame->width * frame->height);
+}
+
+
 /* print time in format: "hh:mm:ss.xxx" */
 void
 print_time(int64_t msec) {
diff --git a/src/util.h b/src/util.h
index bc926b6..4666b06 100644
--- a/src/util.h
+++ b/src/util.h
@@ -26,6 +26,9 @@ frame_mix(struct video_frame *frame_a, struct video_frame *frame_b);
 double
 frame_diff(struct video_frame *frame_a, struct video_frame *frame_b);
 
+double
+frame_average(struct video_frame *frame);
+
 void
 print_time(int64_t msec);