2023-10-26 13:54:33 CST W43D4

avutil_tree.go

@@ -0,0 +1,56 @@
+package ffmpeg
+
+/*
+#include <libavutil/tree.h>
+
+typedef int (*av_tree_cmp_func)(void *opaque, void *elem);
+typedef int (*av_tree_enu_func)(void *opaque, void *elem);
+
+*/
+import "C"
+import "unsafe"
+
+type AVTreeNode C.struct_AVTreeNode
+
+// typedef int (*av_tree_cmp_func)(void *opaque, void *elem);
+type AvTreeCmpFunc = C.av_tree_cmp_func
+
+// typedef int (*av_tree_enu_func)(void *opaque, void *elem);
+type AvTreeEnuFunc = C.av_tree_enu_func
+
+// AvTreeNodeAlloc allocates an AVTreeNode.
+func AvTreeNodeAlloc() *AVTreeNode {
+	return (*AVTreeNode)(C.av_tree_node_alloc())
+}
+
+// AvTreeFind finds an element.
+func AvTreeFind(root *AVTreeNode, key CVoidPointer,
+	cmp AvTreeCmpFunc, next []unsafe.Pointer) unsafe.Pointer {
+	if next != nil && len(next) < 2 {
+		panic("next len < 2")
+	}
+	return (unsafe.Pointer)(C.av_tree_find((*C.struct_AVTreeNode)(root),
+		VoidPointer(key), (C.av_tree_cmp_func)(cmp),
+		(*unsafe.Pointer)(unsafe.Pointer(&next[0]))))
+}
+
+// AvTreeInsert inserts or removes an element.
+func AvTreeInsert(rootp **AVTreeNode, key CVoidPointer,
+	cmp AvTreeCmpFunc, next **AVTreeNode) unsafe.Pointer {
+	return (unsafe.Pointer)(C.av_tree_insert(
+		(**C.struct_AVTreeNode)(unsafe.Pointer(rootp)),
+		VoidPointer(key), (C.av_tree_cmp_func)(cmp),
+		(**C.struct_AVTreeNode)(unsafe.Pointer(next))))
+}
+
+// AvTreeDestroy
+func AvTreeDestroy(t *AVTreeNode) {
+	C.av_tree_destroy((*C.struct_AVTreeNode)(t))
+}
+
+// AvTreeEnumerate applies enu(opaque, &elem) to all the elements in the tree in a given range.
+func AvTreeEnumerate(t *AVTreeNode, opaque CVoidPointer,
+	cmp AvTreeCmpFunc, enu AvTreeEnuFunc) {
+	C.av_tree_enumerate((*C.struct_AVTreeNode)(t), VoidPointer(opaque),
+		(C.av_tree_cmp_func)(cmp), (C.av_tree_enu_func)(enu))
+}