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diff --git a/media/ffvpx/libavutil/hwcontext_internal.h b/media/ffvpx/libavutil/hwcontext_internal.h
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+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_HWCONTEXT_INTERNAL_H
+#define AVUTIL_HWCONTEXT_INTERNAL_H
+
+#include <stddef.h>
+
+#include "buffer.h"
+#include "hwcontext.h"
+#include "frame.h"
+#include "pixfmt.h"
+
+typedef struct HWContextType {
+ enum AVHWDeviceType type;
+ const char *name;
+
+ /**
+ * An array of pixel formats supported by the AVHWFramesContext instances
+ * Terminated by AV_PIX_FMT_NONE.
+ */
+ const enum AVPixelFormat *pix_fmts;
+
+ /**
+ * size of the public hardware-specific context,
+ * i.e. AVHWDeviceContext.hwctx
+ */
+ size_t device_hwctx_size;
+ /**
+ * size of the private data, i.e.
+ * AVHWDeviceInternal.priv
+ */
+ size_t device_priv_size;
+
+ /**
+ * Size of the hardware-specific device configuration.
+ * (Used to query hwframe constraints.)
+ */
+ size_t device_hwconfig_size;
+
+ /**
+ * size of the public frame pool hardware-specific context,
+ * i.e. AVHWFramesContext.hwctx
+ */
+ size_t frames_hwctx_size;
+ /**
+ * size of the private data, i.e.
+ * AVHWFramesInternal.priv
+ */
+ size_t frames_priv_size;
+
+ int (*device_create)(AVHWDeviceContext *ctx, const char *device,
+ AVDictionary *opts, int flags);
+ int (*device_derive)(AVHWDeviceContext *dst_ctx,
+ AVHWDeviceContext *src_ctx, int flags);
+
+ int (*device_init)(AVHWDeviceContext *ctx);
+ void (*device_uninit)(AVHWDeviceContext *ctx);
+
+ int (*frames_get_constraints)(AVHWDeviceContext *ctx,
+ const void *hwconfig,
+ AVHWFramesConstraints *constraints);
+
+ int (*frames_init)(AVHWFramesContext *ctx);
+ void (*frames_uninit)(AVHWFramesContext *ctx);
+
+ int (*frames_get_buffer)(AVHWFramesContext *ctx, AVFrame *frame);
+ int (*transfer_get_formats)(AVHWFramesContext *ctx,
+ enum AVHWFrameTransferDirection dir,
+ enum AVPixelFormat **formats);
+ int (*transfer_data_to)(AVHWFramesContext *ctx, AVFrame *dst,
+ const AVFrame *src);
+ int (*transfer_data_from)(AVHWFramesContext *ctx, AVFrame *dst,
+ const AVFrame *src);
+
+ int (*map_to)(AVHWFramesContext *ctx, AVFrame *dst,
+ const AVFrame *src, int flags);
+ int (*map_from)(AVHWFramesContext *ctx, AVFrame *dst,
+ const AVFrame *src, int flags);
+
+ int (*frames_derive_to)(AVHWFramesContext *dst_ctx,
+ AVHWFramesContext *src_ctx, int flags);
+ int (*frames_derive_from)(AVHWFramesContext *dst_ctx,
+ AVHWFramesContext *src_ctx, int flags);
+} HWContextType;
+
+struct AVHWDeviceInternal {
+ const HWContextType *hw_type;
+ void *priv;
+
+ /**
+ * For a derived device, a reference to the original device
+ * context it was derived from.
+ */
+ AVBufferRef *source_device;
+};
+
+struct AVHWFramesInternal {
+ const HWContextType *hw_type;
+ void *priv;
+
+ AVBufferPool *pool_internal;
+
+ /**
+ * For a derived context, a reference to the original frames
+ * context it was derived from.
+ */
+ AVBufferRef *source_frames;
+ /**
+ * Flags to apply to the mapping from the source to the derived
+ * frame context when trying to allocate in the derived context.
+ */
+ int source_allocation_map_flags;
+};
+
+typedef struct HWMapDescriptor {
+ /**
+ * A reference to the original source of the mapping.
+ */
+ AVFrame *source;
+ /**
+ * A reference to the hardware frames context in which this
+ * mapping was made. May be the same as source->hw_frames_ctx,
+ * but need not be.
+ */
+ AVBufferRef *hw_frames_ctx;
+ /**
+ * Unmap function.
+ */
+ void (*unmap)(AVHWFramesContext *ctx,
+ struct HWMapDescriptor *hwmap);
+ /**
+ * Hardware-specific private data associated with the mapping.
+ */
+ void *priv;
+} HWMapDescriptor;
+
+int ff_hwframe_map_create(AVBufferRef *hwframe_ref,
+ AVFrame *dst, const AVFrame *src,
+ void (*unmap)(AVHWFramesContext *ctx,
+ HWMapDescriptor *hwmap),
+ void *priv);
+
+
+extern const HWContextType ff_hwcontext_type_cuda;
+extern const HWContextType ff_hwcontext_type_d3d11va;
+extern const HWContextType ff_hwcontext_type_drm;
+extern const HWContextType ff_hwcontext_type_dxva2;
+extern const HWContextType ff_hwcontext_type_opencl;
+extern const HWContextType ff_hwcontext_type_qsv;
+extern const HWContextType ff_hwcontext_type_vaapi;
+extern const HWContextType ff_hwcontext_type_vdpau;
+extern const HWContextType ff_hwcontext_type_videotoolbox;
+extern const HWContextType ff_hwcontext_type_mediacodec;
+
+#endif /* AVUTIL_HWCONTEXT_INTERNAL_H */