vf: add vf_control_by_label to send vfctrl to specific filter

2 files changed, 12 insertions, 0 deletions

diff --git a/video/filter/vf.c b/video/filter/vf.c
index 118587766d..2e26ed0fbe 100644
--- a/video/filter/vf.c
+++ b/video/filter/vf.c
@@ -156,6 +156,17 @@ int vf_control_any(struct vf_chain *c, int cmd, void *arg)
     return CONTROL_UNKNOWN;
 }
 
+int vf_control_by_label(struct vf_chain *c,int cmd, void *arg, bstr label)
+{
+    char *label_str = bstrdup0(NULL, label);
+    struct vf_instance *cur = vf_find_by_label(c, label_str);
+    talloc_free(label_str);
+    if (cur)
+        return cur->control(cur, cmd, arg);
+    else
+        return CONTROL_UNKNOWN;
+}
+
 static void vf_fix_img_params(struct mp_image *img, struct mp_image_params *p)
 {
     // Filters must absolutely set these correctly.
diff --git a/video/filter/vf.h b/video/filter/vf.h
index 4e7832a6e8..6bc887bbb2 100644
--- a/video/filter/vf.h
+++ b/video/filter/vf.h
@@ -129,6 +129,7 @@ struct vf_chain *vf_new(struct mpv_global *global);
 void vf_destroy(struct vf_chain *c);
 int vf_reconfig(struct vf_chain *c, const struct mp_image_params *params);
 int vf_control_any(struct vf_chain *c, int cmd, void *arg);
+int vf_control_by_label(struct vf_chain *c, int cmd, void *arg, bstr label);
 int vf_filter_frame(struct vf_chain *c, struct mp_image *img);
 struct mp_image *vf_output_queued_frame(struct vf_chain *c);
 void vf_seek_reset(struct vf_chain *c);