KINGDOM HEARTS Dream Drop Distance

static IMFAttributes *strip_d3d_attributes(IMFAttributes *attrs)
{
    IMFAttributes *plain = NULL;
    UINT32 count = 0;

    if (!attrs || !real_MFCreateAttributes) return NULL;
    IMFAttributes_GetCount(attrs, &count);
    if (SUCCEEDED(real_MFCreateAttributes(&plain, count + 2)) && plain
        && SUCCEEDED(IMFAttributes_CopyAllItems(attrs, plain)))
    {
        IMFAttributes_DeleteItem(plain, &MF_SOURCE_READER_D3D_MANAGER);
        IMFAttributes_DeleteItem(plain, &MF_READWRITE_ENABLE_HARDWARE_TRANSFORMS);
        return plain;
    }
    if (plain) IMFAttributes_Release(plain);
    return NULL;
}

static void plane_write(const BYTE *nv12, UINT stride, UINT width, UINT height)
{
    D3D12_TEXTURE_COPY_LOCATION dst = { 0 }, src = { 0 };
    const BYTE *uv = nv12 + (size_t)stride * height;
    BYTE *mapped = NULL;
    UINT y;

    if (!plane_ready || !bridge_list || !bridge_queue) return;
    /*
     * Copy the planes' geometry, not the frame's.
     *
     * The footprints were computed from the descriptors captured when the pair
     * was created. If a later clip is larger and the game has not yet made a
     * new pair, writing the frame's rows into those footprints runs off the end
     * of the upload buffer. Refusing is the right answer: the next pair the
     * game creates re-arms this.
     */
    if (width != plane_y_desc.Width || height != plane_y_desc.Height) return;
    if (FAILED(ID3D12Resource_Map(plane_upload, 0, NULL, (void **)&mapped)) || !mapped)
        return;
    for (y = 0; y < height; ++y)
        memcpy(mapped + plane_y_fp.Offset + (size_t)y * plane_y_fp.Footprint.RowPitch,
               nv12 + (size_t)y * stride, width);
    for (y = 0; y < height / 2; ++y)
        memcpy(mapped + plane_uv_fp.Offset + (size_t)y * plane_uv_fp.Footprint.RowPitch,
               uv + (size_t)y * stride, width);
    ID3D12Resource_Unmap(plane_upload, 0, NULL);

    ID3D12CommandAllocator_Reset(bridge_alloc);
    ID3D12GraphicsCommandList_Reset(bridge_list, bridge_alloc, NULL);
    src.pResource = plane_upload;
    src.Type = D3D12_TEXTURE_COPY_TYPE_PLACED_FOOTPRINT;
    dst.Type = D3D12_TEXTURE_COPY_TYPE_SUBRESOURCE_INDEX;
    dst.pResource = plane_y;  src.PlacedFootprint = plane_y_fp;
    ID3D12GraphicsCommandList_CopyTextureRegion(bridge_list, &dst, 0, 0, 0, &src, NULL);
    dst.pResource = plane_uv; src.PlacedFootprint = plane_uv_fp;
    ID3D12GraphicsCommandList_CopyTextureRegion(bridge_list, &dst, 0, 0, 0, &src, NULL);
    ID3D12GraphicsCommandList_Close(bridge_list);
    ID3D12CommandQueue_ExecuteCommandLists(bridge_queue, 1,
            (ID3D12CommandList *const *)&bridge_list);

    ++bridge_fence_value;
    if (SUCCEEDED(ID3D12CommandQueue_Signal(bridge_queue, bridge_fence, bridge_fence_value))
        && ID3D12Fence_GetCompletedValue(bridge_fence) < bridge_fence_value
        && bridge_event)
    {
        ID3D12Fence_SetEventOnCompletion(bridge_fence, bridge_fence_value, bridge_event);
        WaitForSingleObject(bridge_event, 1000);
    }
}