blob: 4952ee5ab62711542b2611510ad2ef9f40be3b9f [file] [log] [blame]
// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/memory/scoped_refptr.h"
namespace gfx {
class Rect;
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 {
DecodeSurfaceHandler() = default;
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(const scoped_refptr<T>& dec_surface,
int32_t bitstream_id,
const gfx::Rect& visible_rect,
const VideoColorSpace& color_space) = 0;
} // namespace media