视频带宽计算Demo

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace DaikuanDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            var data= bandwidthTesting(1080, 1920, "YCBCR_420", 1.064, 8, 60);
            Console.WriteLine(data);
            Console.ReadLine();
        }

        public static double bandwidthTesting(double height, double width, string ChromaSamplingFactor, double PF, double BitsPerPixel, double FrameRate)
        {

            double HDMI_H_ACTIVE = width;
            BitsPerPixel = BitsPerPixel * 3;
            /**
             * 带宽计算公式:
             * "color_space" : "YCBCR_422"
             * 视频的总高度*视频的活跃宽度*色度采样因子*PF*像素深度(RGB每个占8，一共是24)*帧率/1 000 000 000
             * HDMI_V_TOTAL * HDMI_H_ACTIVE * Chroma sampling factor * PF * Bits per pixel * Frame rate / 1 000 000 000
             */

            #region 对采样因子进行处理 retuen lastchromaSamplingFactor --张小墨
            /**
                 * 对色度采样因子进行处理:
                 * 处理思路：
                 * 
                 * 1.定义四个变量，用来存储在横竖方面各自的分子和分母
                 * 2.对ChromaSamplingFactor进行拆分，获取后三位，再将后三位拆成单个的数据
                 * 3.横向的分子是中间的数，分母是第一个数
                 * 4.竖向的，如果不是零，分子是1，分母是2. 如果是0，分子分母都是1
                 * 5.分别对横竖方面的分子分母进行约分
                 * 6.将横竖的分子相加，分母相加，结果进行约分
                 * 7.返回约分后的结果
                 * 
                 */
            //分子
            int line_numerator = 0, vertical_numerator = 0;
            //分母
            int line_denominator = 0, vertical_denominator = 0;

            //最终的分子分母
            double last_numerator = 0, last_denominator = 0;
            //YCBCR_422
            var ChromaSamplingNumberstring = ChromaSamplingFactor.Split('_')[1].ToCharArray();
            //取出每个数据
            for (int i = 0; i < ChromaSamplingNumberstring.Length; i++)
            {
                if (i == 0)
                {
                    line_denominator = int.Parse(ChromaSamplingNumberstring[i].ToString());
                }
                if (i == 1)
                {
                    line_numerator = int.Parse(ChromaSamplingNumberstring[i].ToString());
                }
                if (i == 2)
                {
                    vertical_numerator = 1;if (int.Parse(ChromaSamplingNumberstring[i].ToString()) != 0)
                    {
                        vertical_denominator = 1;
                    }
                    else
                    {
                        vertical_denominator = 2;
                    }
                }
            }
            //对行数据进行约分
            if (line_denominator % line_numerator == 0)
            {
                line_denominator = line_denominator / line_numerator;
                line_numerator = 1;

            }
            //获得最后的分子分母值
            last_denominator = line_denominator + vertical_denominator;
            last_numerator = line_numerator + vertical_numerator;
            double lastchromaSamplingFactor = last_numerator / last_denominator;
            #endregion

            #region 计算HDMI_V_TOTA retuen HDMI_V_TOTA --张小墨
            /**
                 * 计算HDMI_V_TOTA：
                 * 计算思路:
                 *1.获取到此种视频的宽高隐藏比例
                 *2.计算例子：x-24%x=1280     (1-0.24)x=1280  x=1280/0.76=1684
                 *
                 */
            double HDMI_V_TOTA = 1080 / (1 - (4.00 / 100));
            #endregion

            double bandWidth = HDMI_V_TOTA * HDMI_H_ACTIVE * lastchromaSamplingFactor * PF * BitsPerPixel * FrameRate / 1000000000;


            return bandWidth;
        }
    }
}