图像处理之基础---2个YUV视频 拼接技术

/*************************************************
* 主要功能：两路 YUV4:2:0拼接一路左右半宽格式YUV视频
参考资料：http://www.pudn.com/downloads271/sourcecode/multimedia/vfw/detail1237363.html
U_size=V_size=Y_size/2
*************************************************/
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define PREWEIGHT 1920
#define PREHEIGHT 1080
#define RESWEIGHT 3840
#define RESHEIGHT 1080
#define PREYSIZE ((PREWEIGHT)*(PREHEIGHT))
#define PREUSIZE ((PREWEIGHT/2)*(PREHEIGHT/2))
#define PREVSIZE ((PREWEIGHT/2)*(PREHEIGHT/2))
#define RESYSIZE ((RESWEIGHT)*(RESHEIGHT))
#define RESUSIZE ((RESWEIGHT/2)*(RESHEIGHT/2))
#define RESVSIZE ((RESWEIGHT/2)*(RESHEIGHT/2))
#define PRESIZE ((PREYSIZE)+(PREUSIZE)+(PREVSIZE))
#define RESSIZE ((RESYSIZE)+(RESUSIZE)+(RESVSIZE))

int GetFrameNum(const char *File)
{
    FILE *fp;
    int size=0;
    if (!(fp=fopen(File,"rb")))
    {
        printf("Open %s error !",File);
        exit(1);
    }
    else
    {
        fseek(fp,0,SEEK_END);/*将文件指针移到YUV文件的末尾*/
        size=ftell(fp);/*计算文件的总大小*/
    }
    return (size/PRESIZE);
}
void ReadYUV(char *ResBuf,char *PreBuf,int resstart,int prestart,int resoffset,int preoffset,int size,int height)
{
    int k;
    for (k=0;k<height;k++)
    {
        memmove(ResBuf+resstart+k*(resoffset),PreBuf+prestart+k*(preoffset),size);//注意这里用memmov不用strncpy
    }
}
int main(int argc,char *argv[])
{
    const char *FileName[]={"e:BMX_L_1920x1080_240frms.yuv","e:BMX_R_1920x1080_240frms.yuv"};/*两路YUV文件名*/
    FILE *FileResult;/*输出文件名*/
    FILE** fp_combine=(FILE**)malloc(sizeof(FILE *)*3);/*申请文件指针*/
    int *FileFrameNum=(int *)malloc(sizeof(int)*3);/*每个YUV的帧数*/
    char *PreBuf=(char *)malloc(sizeof(char)*(PRESIZE+1));/*处理前每一帧图像的大小*/
    char *ResBuf=(char*)malloc(sizeof(char)*(RESSIZE+1));/*处理后每一帧图像的大小*/
    int Y_start_section=0;/*预处理图片Y分量存入目标区域的起始区域*/
    int U_start_section = 0;/*预处理图片U分量存入目标区域的起始区域*/
    int V_start_section = 0;/*预处理图片V分量存入目标区域的起始区域*/
    int File_offset = 0;/*预处理文件偏移值*/
    int i_combine=0,j_combine=0,k_combine=0;/*控制循环*/
    /*判断申请内存是否成功*/
    if (!((fp_combine)&&(FileFrameNum)&&(PreBuf)&&(ResBuf)))
    {
        printf("Allocate memeroy Faile !");
        exit(1);
    }
    /*初始化申请空间*/
    memset(fp_combine,0,sizeof(FILE *)*2);
    memset(FileFrameNum,0,sizeof(int)*2);
    memset(PreBuf,0,sizeof(char)*PRESIZE);
    memset(ResBuf,0,sizeof(char)*RESSIZE);
    if (!(FileResult=fopen("hua_result.YUV","wb")))/*创建输出文件*/
    {
        printf("Creat File faile !");
        exit(1);
    }
    for (i_combine=0;i_combine<2;i_combine++)
    {
        if(!(fp_combine[i_combine]=fopen(FileName[i_combine],"rb")))/*打开输入文件*/
        {
            printf("Open File %s Faile !",FileName[i_combine]);
            exit(1);
        }
        else
        {
            FileFrameNum[i_combine]=GetFrameNum(FileName[i_combine]);/*存储每一个视频的帧数*/
        }
    }
    i_combine=0;
    k_combine=FileFrameNum[i_combine];
    while (i_combine<k_combine)
    {
        File_offset = i_combine*PRESIZE;
        j_combine=0;
        while (j_combine<2)
        {
            fseek(fp_combine[j_combine],File_offset,SEEK_SET);/*移动文件指针至需要处理的数据的位置*/
            fread(PreBuf,1,PRESIZE,fp_combine[j_combine]);/*读取一幅图像*/
            if (j_combine==0)
            {
                /*把读取预处理图片Y/U/V分量的起始位置放置目标对应位置*/
                Y_start_section=0;
                U_start_section=RESYSIZE;
                V_start_section=RESYSIZE+RESUSIZE;
            }
            else
            {
                /*把读取预处理图片Y/U/V分量的起始位置放置目标对应位置*/
                Y_start_section=PREWEIGHT;
                U_start_section=RESYSIZE+PREWEIGHT/2;
                V_start_section=RESYSIZE+RESUSIZE+PREWEIGHT/2;
            }
            /*分别读Y、U、V*/
            ReadYUV(ResBuf,PreBuf,Y_start_section,0,                 RESWEIGHT,PREWEIGHT,PREWEIGHT,PREHEIGHT);
            ReadYUV(ResBuf,PreBuf,U_start_section,PREYSIZE,          RESWEIGHT/2,PREWEIGHT/2,PREWEIGHT/2,PREHEIGHT/2);
            ReadYUV(ResBuf,PreBuf,V_start_section,PREYSIZE+PREUSIZE, RESWEIGHT/2,PREWEIGHT/2,PREWEIGHT/2,PREHEIGHT/2);
            j_combine++;
        }
        fwrite(ResBuf,1,RESSIZE,FileResult);
        fflush(FileResult);
        i_combine++;
    }
    fclose(fp_combine[0]);
    fclose(fp_combine[1]);
    fclose(FileResult);
    return 0;
}

http://blog.csdn.net/huahuahailang/article/details/9040847