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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_GPU_V4L2_DECODE_SURFACE_HANDLER_H_
#define MEDIA_GPU_V4L2_DECODE_SURFACE_HANDLER_H_
#include "base/memory/scoped_refptr.h"
#include "ui/gfx/geometry/rect.h"
namespace media {
class VideoColorSpace;
// Interface representing {V4L2,Vaapi}DecodeSurface operations, i.e. a client
// gets a T to work with by calling CreateSurface() and returns it when finished
// by calling SurfaceReady(). Class T has to be ref-counted. No assumptions are
// made about threading.
template <class T>
class DecodeSurfaceHandler {
public:
DecodeSurfaceHandler() = default;
DecodeSurfaceHandler(const DecodeSurfaceHandler&) = delete;
DecodeSurfaceHandler& operator=(const DecodeSurfaceHandler&) = delete;
virtual ~DecodeSurfaceHandler() = default;
// Returns a T for decoding into, if available, or nullptr.
virtual scoped_refptr<T> CreateSurface() = 0;
// Called by the client to indicate that |dec_surface| is ready to be
// outputted. This can actually be called before decode is finished in
// hardware; this method must guarantee that |dec_surface|s are processed in
// the same order as SurfaceReady() is called. (On Intel, this order doesn't
// need to be explicitly maintained since the driver will enforce it, together
// with any necessary dependencies).
virtual void SurfaceReady(scoped_refptr<T> dec_surface,
int32_t bitstream_id,
const gfx::Rect& visible_rect,
const VideoColorSpace& color_space) = 0;
};
} // namespace media
#endif // MEDIA_GPU_V4L2_DECODE_SURFACE_HANDLER_H_
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