/*
*YUV422->YUV420
*/
#if?0
//YUV422是分片組裝
void?YUV422toYUV420（unsigned?char?*yuv420?unsigned?char?*yuv422?int?Y_width?int?Y_height）
{
	int?UV_width_422?=?Y_width>>1;?//422色度信號(hào)U和V寬度
	int?UV_height_422?=?Y_height;?//422色度信號(hào)U和V高度?

	int?UV_width_420?=?Y_width>>1;?//420色度信號(hào)U和V寬度
	int?UV_height_420?=?Y_height>>1;?//420色度信號(hào)U和V高度?

	int?Ylen?=?Y_width*Y_height;

	unsigned?char?*p_Y420?=?yuv420?;???
	unsigned?char?*p_U420?=?p_Y420?+?Ylen?;???
	unsigned?char?*p_V420?=?p_U420?+?Ylen/4?;???

	unsigned?char?*p_Y422?=?yuv422?;???
	unsigned?char?*p_U422?=?p_Y422?+?Ylen?;???
	unsigned?char?*p_V422?=?p_U422?+?Ylen/2?;???

	//亮度信號(hào)Y復(fù)制
	memcpy（p_Y420?p_Y422?Ylen）;

	//U、V取平均值
	int?k?=?0?;???
	BYTE?u1?u2??v1?v2?;???
	for?（?int?i?=?0?;?i?	{???
		for?（?int?j?=?0?;?j?		{???
			u1?=?*（p_U422+i*UV_width_422+j）?;???
			u2?=?*（p_U422+（i+1）*UV_width_422+j）?;???

			v1?=?*（p_V422+i*UV_width_422+j）?;???
			v2?=?*（p_V422+（i+1）*UV_width_422+j）?;???

			//色度信號(hào)U復(fù)制
			*（p_U420+k*UV_width_420+j）?=?（（u1+u2）?>>?1）?;???

			//色度信號(hào)V復(fù)制
			*（p_V420+k*UV_width_420+j）?=?（（v1+v2）?>>?1）?;???
		}???
		k++?;???
	}??
}
#else
//YUV422是打包組裝
void?YUV422toYUV420（unsigned?char?*yuv420?unsigned?char?*yuv422?int?Y_width?int?Y_height）
{
	int?len?=?Y_width?*?Y_height;
	unsigned?char*?pY420?=?yuv420;
	unsigned?char*?pU420?=?yuv420?+?len;
	unsigned?char*?pV420?=?pU420?+?len/4;

	unsigned?char*?pY422?=?yuv422;
	for?（int?i?=?0;?i	{
		*pY420?=?*pY422;
		pY420++;
		pY422+=2;
	}

	unsigned?char*?pU422?=?yuv422?+?1;
	for?（int?i?=?0;?i	{
		*pU420?=?（*pU422?+?*（pU422?+?4））/2;
		pU420++;
		pU422+=8;
	}

	unsigned?char*?pV422?=?yuv422?+?3;
	for?（int?i?=?0;?i	{
		*pV420?=?（*pV422?+?*（pV422?+?4））