LoadVideoFromResource.cpp

# include <Siv3D.hpp> // OpenSiv3D v0.6.3

VideoTexture LoadVideoFromResource(const FilePathView resourcePath, const FilePathView temporaryFilePath, const Loop loop)
{
# if SIV3D_PLATFORM(WINDOWS)

	if (not FileSystem::Exists(temporaryFilePath))
	{
		Print << U"ファイルをコピー";

		BinaryReader reader{ resourcePath };

		if (not reader)
		{
			return{};
		}

		BinaryWriter writer{ temporaryFilePath };
		int64 copySize = reader.size();
		constexpr int64 BlockSize = (1024 * 64);
		Array<Byte> buffer(BlockSize);

		while (copySize)
		{
			const int64 readSize = Min(copySize, BlockSize);
			reader.read(buffer.data(), readSize);
			writer.write(buffer.data(), readSize);
			copySize -= readSize;
		}
	}
	else
	{
		Print << U"キャッシュが存在";
	}

	return VideoTexture{ temporaryFilePath, loop };

# else

	return VideoTexture{ resourcePath, loop };

# endif
}

void Main()
{
	const FilePath resourcePath = Resource(U"example/video/river.mp4");
	const FilePath temporaryFilePath = (FileSystem::TemporaryDirectoryPath() + U"MyApp/river.mp4");
	Print << resourcePath;
	Print << temporaryFilePath;

	const VideoTexture videoTexture = LoadVideoFromResource(resourcePath, temporaryFilePath, Loop::Yes);

	while (System::Update())
	{
		videoTexture.advance();
		videoTexture.scaled(0.5).draw();
	}
}