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diff --git a/src/internal_frame_buffer_list.h b/src/internal_frame_buffer_list.h
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+/*
+ * Copyright 2019 The libgav1 Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef LIBGAV1_SRC_INTERNAL_FRAME_BUFFER_LIST_H_
+#define LIBGAV1_SRC_INTERNAL_FRAME_BUFFER_LIST_H_
+
+#include <cstddef>
+#include <cstdint>
+#include <memory>
+
+#include "src/gav1/frame_buffer.h"
+#include "src/utils/memory.h"
+#include "src/utils/vector.h"
+
+namespace libgav1 {
+
+extern "C" Libgav1StatusCode OnInternalFrameBufferSizeChanged(
+    void* callback_private_data, int bitdepth, Libgav1ImageFormat image_format,
+    int width, int height, int left_border, int right_border, int top_border,
+    int bottom_border, int stride_alignment);
+
+extern "C" Libgav1StatusCode GetInternalFrameBuffer(
+    void* callback_private_data, int bitdepth, Libgav1ImageFormat image_format,
+    int width, int height, int left_border, int right_border, int top_border,
+    int bottom_border, int stride_alignment, Libgav1FrameBuffer* frame_buffer);
+
+extern "C" void ReleaseInternalFrameBuffer(void* callback_private_data,
+                                           void* buffer_private_data);
+
+class InternalFrameBufferList : public Allocable {
+ public:
+  InternalFrameBufferList() = default;
+
+  // Not copyable or movable.
+  InternalFrameBufferList(const InternalFrameBufferList&) = delete;
+  InternalFrameBufferList& operator=(const InternalFrameBufferList&) = delete;
+
+  ~InternalFrameBufferList() = default;
+
+  Libgav1StatusCode OnFrameBufferSizeChanged(int bitdepth,
+                                             Libgav1ImageFormat image_format,
+                                             int width, int height,
+                                             int left_border, int right_border,
+                                             int top_border, int bottom_border,
+                                             int stride_alignment);
+
+  Libgav1StatusCode GetFrameBuffer(int bitdepth,
+                                   Libgav1ImageFormat image_format, int width,
+                                   int height, int left_border,
+                                   int right_border, int top_border,
+                                   int bottom_border, int stride_alignment,
+                                   Libgav1FrameBuffer* frame_buffer);
+
+  void ReleaseFrameBuffer(void* buffer_private_data);
+
+ private:
+  struct Buffer : public Allocable {
+    std::unique_ptr<uint8_t[], MallocDeleter> data;
+    size_t size = 0;
+    bool in_use = false;
+  };
+
+  Vector<std::unique_ptr<Buffer>> buffers_;
+};
+
+}  // namespace libgav1
+
+#endif  // LIBGAV1_SRC_INTERNAL_FRAME_BUFFER_LIST_H_