command: add vf-command command

3 files changed, 22 insertions, 0 deletions

diff --git a/video/filter/vf.c b/video/filter/vf.c
index 35de0f23a7..f710d81ea7 100644
--- a/video/filter/vf.c
+++ b/video/filter/vf.c
@@ -163,6 +163,17 @@ static void vf_control_all(struct vf_chain *c, int cmd, void *arg)
     }
 }
 
+int vf_send_command(struct vf_chain *c, char *label, char *cmd, char *arg)
+{
+    char *args[2] = {cmd, arg};
+    if (strcmp(label, "all") == 0) {
+        vf_control_all(c, VFCTRL_COMMAND, args);
+        return 0;
+    } else {
+        return vf_control_by_label(c, VFCTRL_COMMAND, args, bstr0(label));
+    }
+}
+
 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 f828d4e735..c982b612e1 100644
--- a/video/filter/vf.h
+++ b/video/filter/vf.h
@@ -144,6 +144,7 @@ enum vf_ctrl {
     /* Hack to make the OSD state object available to vf_sub which
      * access OSD/subtitle state outside of normal OSD draw time. */
     VFCTRL_INIT_OSD,
+    VFCTRL_COMMAND,
 };
 
 struct vf_chain *vf_new(struct mpv_global *global);
@@ -164,6 +165,8 @@ struct vf_instance *vf_find_by_label(struct vf_chain *c, const char *label);
 void vf_print_filter_chain(struct vf_chain *c, int msglevel,
                            struct vf_instance *vf);
 
+int vf_send_command(struct vf_chain *c, char *label, char *cmd, char *arg);
+
 // Filter internal API
 struct mp_image *vf_alloc_out_image(struct vf_instance *vf);
 bool vf_make_out_image_writeable(struct vf_instance *vf, struct mp_image *img);
diff --git a/video/filter/vf_lavfi.c b/video/filter/vf_lavfi.c
index e1705f6874..8cfd27a7bd 100644
--- a/video/filter/vf_lavfi.c
+++ b/video/filter/vf_lavfi.c
@@ -335,6 +335,14 @@ static int control(vf_instance_t *vf, int request, void *data)
     case VFCTRL_SEEK_RESET:
         reset(vf);
         return CONTROL_OK;
+    case VFCTRL_COMMAND: {
+        if (!vf->priv->graph)
+            break;
+        char **args = data;
+        return avfilter_graph_send_command(vf->priv->graph, "all",
+                                           args[0], args[1], &(char){0}, 0, 0)
+                >= 0 ? CONTROL_OK : CONTROL_ERROR;
+    }
     case VFCTRL_GET_METADATA:
         if (vf->priv && vf->priv->metadata) {
             *(struct mp_tags *)data = *vf->priv->metadata;