chromium/media/video/video_encode_accelerator_adapter.h

// Copyright 2020 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_VIDEO_VIDEO_ENCODE_ACCELERATOR_ADAPTER_H_
#define MEDIA_VIDEO_VIDEO_ENCODE_ACCELERATOR_ADAPTER_H_

#include <memory>
#include <optional>

#include "base/containers/circular_deque.h"
#include "base/containers/queue.h"
#include "base/functional/callback_forward.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/read_only_shared_memory_region.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/unsafe_shared_memory_pool.h"
#include "base/synchronization/lock.h"
#include "base/time/time.h"
#include "media/base/media_export.h"
#include "media/base/video_encoder.h"
#include "media/base/video_frame_converter.h"
#include "media/media_buildflags.h"
#include "media/video/video_encode_accelerator.h"
#include "ui/gfx/color_space.h"
#include "ui/gfx/geometry/size.h"

namespace base {
class SequencedTaskRunner;
}

namespace media {
class GpuVideoAcceleratorFactories;
class MediaLog;
class H264AnnexBToAvcBitstreamConverter;
#if BUILDFLAG(ENABLE_PLATFORM_HEVC) && \
    BUILDFLAG(ENABLE_HEVC_PARSER_AND_HW_DECODER)
class H265AnnexBToHevcBitstreamConverter;
#endif  // BUILDFLAG(ENABLE_PLATFORM_HEVC) &&
        // BUILDFLAG(ENABLE_HEVC_PARSER_AND_HW_DECODER)

// This class is a somewhat complex adapter from VideoEncodeAccelerator
// to VideoEncoder, it takes cares of such things as
// - managing and copying GPU/shared memory buffers
// - managing hops between task runners, for VEA and callbacks
// - keeping track of the state machine. Forbiding encodes during flush etc.
class MEDIA_EXPORT VideoEncodeAcceleratorAdapter
    : public VideoEncoder,
      public VideoEncodeAccelerator::Client { … };

}  // namespace media
#endif  // MEDIA_VIDEO_VIDEO_ENCODE_ACCELERATOR_ADAPTER_H_