lavfi: modify avfilter_get_matrix to support separate scale factors

1 files changed, 10 insertions, 3 deletions

diff --git a/libavfilter/transform.c b/libavfilter/transform.c
index f92fc4d42f..f4f9e0a47d 100644
--- a/libavfilter/transform.c
+++ b/libavfilter/transform.c
@@ -103,12 +103,19 @@ INTERPOLATE_METHOD(interpolate_biquadratic)
     }
 }
 
-void avfilter_get_matrix(float x_shift, float y_shift, float angle, float zoom, float *matrix) {
-    matrix[0] = zoom * cos(angle);
+void ff_get_matrix(
+    float x_shift,
+    float y_shift,
+    float angle,
+    float scale_x,
+    float scale_y,
+    float *matrix
+) {
+    matrix[0] = scale_x * cos(angle);
     matrix[1] = -sin(angle);
     matrix[2] = x_shift;
     matrix[3] = -matrix[1];
-    matrix[4] = matrix[0];
+    matrix[4] = scale_y * cos(angle);
     matrix[5] = y_shift;
     matrix[6] = 0;
     matrix[7] = 0;