1 files changed, 30 insertions, 0 deletions
diff --git a/filters/f_lavfi.h b/filters/f_lavfi.h
new file mode 100644
index 0000000000..7efc96c3de
--- /dev/null
+++ b/filters/f_lavfi.h
@@ -0,0 +1,30 @@
+#pragma once
+
+#include "frame.h"
+
+// A wrapped libavfilter filter or filter graph.
+// (to free this, free the filtert itself, mp_lavfi.f)
+struct mp_lavfi {
+    // This mirrors the libavfilter pads according to the user specification.
+    struct mp_filter *f;
+};
+
+// Create a filter with the given libavfilter graph string. The graph must
+// have labels on all unconnected pads; these are exposed as pins.
+//  type: if not 0, require all pads to have a compatible media type (or error)
+//  bidir: if true, require exactly 2 pads, 1 input, 1 output (mp_lavfi.f will
+//         have the input as pin 0, and the output as pin 1)
+//  graph_opts: options for the filter graph, see mp_set_avopts() (NULL is OK)
+//  graph: a libavfilter graph specification
+struct mp_lavfi *mp_lavfi_create_graph(struct mp_filter *parent,
+                                       enum mp_frame_type type, bool bidir,
+                                       char **graph_opts, const char *graph);
+
+// Unlike mp_lavfi_create_graph(), this creates a single filter, using explicit
+// options, and without involving the libavfilter graph parser. Instead of
+// a graph, it takes a filter name, and a key-value list of filter options
+// (which are applied with mp_set_avopts()).
+struct mp_lavfi *mp_lavfi_create_filter(struct mp_filter *parent,
+                                        enum mp_frame_type type, bool bidir,
+                                        char **graph_opts,
+                                        const char *filter, char **filter_opts);