2023-10-24 21:24:55 CST W43D2

avutil_display.go

@@ -0,0 +1,25 @@
+package ffmpeg
+
+/*
+#include <libavutil/display.h>
+*/
+import "C"
+
+// AvDisplayRotationGet extracts the rotation component of the transformation matrix.
+func AvDisplayRotationGet(matrix []int32) float64 {
+	if len(matrix) < 9 {
+		panic("matrix len < 9")
+	}
+	return (float64)(C.av_display_rotation_get((*C.int32_t)(&matrix[0])))
+}
+
+// AvDisplayRotationSet initializes a transformation matrix describing a pure counterclockwise
+// rotation by the specified angle (in degrees).
+func AvDisplayRotationSet(matrix []int32, angle float64) {
+	C.av_display_rotation_set((*C.int32_t)(&matrix[0]), (C.double)(angle))
+}
+
+// AvDisplayMatrixFlip flips the input matrix horizontally and/or vertically.
+func AvDisplayMatrixFlip(matrix []int32, hflip, vflip int32) {
+	C.av_display_matrix_flip((*C.int32_t)(&matrix[0]), (C.int)(hflip), (C.int)(vflip))
+}