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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_WINDOWS_D3D11_VIDEO_CONTEXT_WRAPPER_H_
#define MEDIA_GPU_WINDOWS_D3D11_VIDEO_CONTEXT_WRAPPER_H_
#include <d3d11_1.h>
#include <wrl/client.h>
#include <memory>
#include "base/memory/raw_ptr.h"
#include "media/gpu/media_gpu_export.h"
#include "media/gpu/windows/d3d11_com_defs.h"
namespace media {
class MEDIA_GPU_EXPORT VideoContextWrapper {
public:
VideoContextWrapper() = default;
VideoContextWrapper(const VideoContextWrapper&) = delete;
VideoContextWrapper& operator=(const VideoContextWrapper&) = delete;
virtual ~VideoContextWrapper();
// D3D11_VIDEO_DECODER_BUFFER_DESC1 and D3D11_VIDEO_DECODER_BUFFER_DESC
// have radically different sets of member variables, which means that in
// order to have a converter class, we need to support all fields. They are
// also in different orders, which prevents using a simple memcpy.
// It seems we don't currently use any of the D3D11_VIDEO_DECODER_BUFFER_DESC
// specific fields right now.
// Fields are named as they appear in the D3D11 Structs.
struct VideoBufferWrapper {
// Shared Fields
D3D11_VIDEO_DECODER_BUFFER_TYPE BufferType;
UINT DataOffset;
UINT DataSize;
raw_ptr<void> pIV;
UINT IVSize;
// DESC1-specific fields
raw_ptr<D3D11_VIDEO_DECODER_SUB_SAMPLE_MAPPING_BLOCK>
pSubSampleMappingBlock;
UINT SubSampleMappingCount;
};
static std::unique_ptr<VideoContextWrapper> CreateWrapper(
D3D_FEATURE_LEVEL supported_d3d11_version,
ComD3D11DeviceContext device_context,
HRESULT* status);
// This method signiture is defined to match exactly that of
// |ID3D11VideoContext::DecoderBeginFrame|.
virtual HRESULT DecoderBeginFrame(ID3D11VideoDecoder* video_decoder,
ID3D11VideoDecoderOutputView* output_view,
UINT content_key_size,
const void* content_key) = 0;
// This method signiture is defined to match exactly that of
// |ID3D11VideoContext::GetDecoderBuffer|.
virtual HRESULT GetDecoderBuffer(ID3D11VideoDecoder* video_decoder,
D3D11_VIDEO_DECODER_BUFFER_TYPE type,
UINT* buffer_size,
void** buffer) = 0;
// This method signiture is defined to match exactly that of
// |ID3D11VideoContext::ReleaseDecoderBuffer|.
virtual HRESULT ReleaseDecoderBuffer(
ID3D11VideoDecoder* video_decoder,
D3D11_VIDEO_DECODER_BUFFER_TYPE type) = 0;
// This method signiture is defined to match exactly that of
// |ID3D11VideoContext::DecoderEndFrame|.
virtual HRESULT DecoderEndFrame(ID3D11VideoDecoder* video_decoder) = 0;
// This method signiture is defined to match exactly that of
// |ID3D11VideoContext::SubmitDecoderBuffers|.
virtual HRESULT SubmitDecoderBuffers(ID3D11VideoDecoder* video_decoder,
UINT num_buffers,
const VideoBufferWrapper* buffers) = 0;
}; // VideoContextWrapper
} // namespace media
#endif // MEDIA_GPU_WINDOWS_D3D11_VIDEO_CONTEXT_WRAPPER_H_
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