text: // Copyright 2019 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 <random>
  #include <utility>
  
  #include "base/bind_helpers.h"
  #include "media/base/win/d3d11_mocks.h"
  #include "media/gpu/windows/d3d11_copying_texture_wrapper.h"
  #include "media/gpu/windows/d3d11_texture_wrapper.h"
  #include "media/gpu/windows/d3d11_video_processor_proxy.h"
  #include "testing/gmock/include/gmock/gmock.h"
  #include "testing/gtest/include/gtest/gtest.h"
  
  using ::testing::_;
  using ::testing::DoAll;
  using ::testing::Return;
  using ::testing::SetArgPointee;
  
  namespace media {
  
  using MockD3D11VideoDevice = Microsoft::WRL::ComPtr<D3D11VideoDeviceMock>;
  using MockD3D11DeviceContext = Microsoft::WRL::ComPtr<D3D11DeviceContextMock>;
  using MockD3D11VideoContext = Microsoft::WRL::ComPtr<D3D11VideoContextMock>;
  using MockD3D11VideoProcessor = Microsoft::WRL::ComPtr<D3D11VideoProcessorMock>;
  using MockD3D11VideoProcessorEnumerator =
      Microsoft::WRL::ComPtr<D3D11VideoProcessorEnumeratorMock>;
  
  class D3D11VideoProcessorProxyUnittest : public ::testing::Test {
   public:
    MockD3D11VideoDevice dev_;
    MockD3D11DeviceContext ctx_;
    MockD3D11VideoContext vctx_;
    MockD3D11VideoProcessorEnumerator enumerator_;
    MockD3D11VideoProcessor proc_;
  
    std::unique_ptr<VideoProcessorProxy> CreateProxy() {
      dev_ = MakeComPtr<D3D11VideoDeviceMock>();
      ctx_ = MakeComPtr<D3D11DeviceContextMock>();
      vctx_ = MakeComPtr<D3D11VideoContextMock>();
      proc_ = MakeComPtr<D3D11VideoProcessorMock>();
      enumerator_ = MakeComPtr<D3D11VideoProcessorEnumeratorMock>();
  
      EXPECT_CALL(*dev_.Get(), CreateVideoProcessorEnumerator(_, _))
          .WillOnce(SetComPointeeAndReturnOk<1>(enumerator_.Get()));
  
      EXPECT_CALL(*dev_.Get(), CreateVideoProcessor(_, _, _))
          .WillOnce(SetComPointeeAndReturnOk<2>(proc_.Get()));
  
      EXPECT_CALL(*ctx_.Get(), QueryInterface(_, _))
          .WillOnce(SetComPointeeAndReturnOk<1>(vctx_.Get()));
  
      return std::make_unique<VideoProcessorProxy>(dev_, ctx_);
    }
  
    // Pull a random pointer off the stack, rather than relying on nullptrs.
    template <typename T>
    T* CreateGarbagePtr() {
      int foo;
      void* local = &foo;
      return static_cast<T*>(local);
    }
  };
  
  // The processor proxy wraps the VideoDevice/VideoContext and stores some of the
  // d3d11 types. Make sure that the arguments we give these methods are passed
  // through correctly.
  TEST_F(D3D11VideoProcessorProxyUnittest, EnsureMethodPassthrough) {
    auto proxy = CreateProxy();
  
    // Garbage pointers are used because the proxy just passes them along and does
    // absolutely nothing with them.
    auto* texture = CreateGarbagePtr<ID3D11Texture2D>();
    auto* out_desc = CreateGarbagePtr<D3D11_VIDEO_PROCESSOR_OUTPUT_VIEW_DESC>();
    auto* in_desc = CreateGarbagePtr<D3D11_VIDEO_PROCESSOR_INPUT_VIEW_DESC>();
    auto* out_view = CreateGarbagePtr<ID3D11VideoProcessorOutputView>();
    auto* streams = CreateGarbagePtr<D3D11_VIDEO_PROCESSOR_STREAM>();
  
    EXPECT_CALL(*dev_.Get(), CreateVideoProcessorOutputView(
                                 texture, enumerator_.Get(), out_desc, nullptr));
  
    EXPECT_CALL(*dev_.Get(), CreateVideoProcessorInputView(
                                 texture, enumerator_.Get(), in_desc, nullptr));
  
    EXPECT_CALL(*vctx_.Get(),
                VideoProcessorBlt(proc_.Get(), out_view, 6, 7, streams));
  
    EXPECT_TRUE(proxy->Init(0, 0).is_ok());
    proxy->CreateVideoProcessorOutputView(texture, out_desc, nullptr);
    proxy->CreateVideoProcessorInputView(texture, in_desc, nullptr);
    proxy->VideoProcessorBlt(out_view, 6, 7, streams);
  }
  
  }  // namespace media
  