C++ YUV422怎么转化为RAW,怎么实现

将 YUV422 转化为 RAW 需要进行以下步骤：

1. 读取 YUV422 数据并将其存储到内存中。
2. 将 YUV422 数据转换为 RGB 数据。
3. 将 RGB 数据转换为 RAW 数据格式。

下面是一个 C++ 示例代码，可以实现将 YUV422 转换为 RAW：

#include <stdio.h>
#include <stdlib.h>

typedef struct tagBITMAPFILEHEADER
{
    unsigned short bfType;
    unsigned int   bfSize;
    unsigned short bfReserved1;
    unsigned short bfReserved2;
    unsigned int   bfOffBits;
}BITMAPFILEHEADER;

typedef struct tagBITMAPINFOHEADER
{
    unsigned int   biSize;
    int            biWidth;
    int            biHeight;
    unsigned short biPlanes;
    unsigned short biBitCount;
    unsigned int   biCompression;
    unsigned int   biSizeImage;
    int            biXPelsPerMeter;
    int            biYPelsPerMeter;
    unsigned int   biClrUsed;
    unsigned int   biClrImportant;
}BITMAPINFOHEADER;

typedef struct tagRGBQUAD
{
    unsigned char rgbBlue;
    unsigned char rgbGreen;
    unsigned char rgbRed;
    unsigned char rgbReserved;
}RGBQUAD;

void YUV2RGB(int y, int u, int v, int &r, int &g, int &b)
{
    r = y + 1.402 * (v - 128);
    g = y - 0.34414 * (u - 128) - 0.71414 * (v - 128);
    b = y + 1.772 * (u - 128);
}

void YUV422ToRGB(unsigned char *yuv, unsigned char *rgb, int width, int height)
{
    int y1, y2, u, v;
    int r1, g1, b1, r2, g2, b2;
    int index, line, column;

    for (line = 0; line < height; line++)
    {
        for (column = 0; column < width; column += 2)
        {
            index = line * width * 2 + column * 2;
            y1 = yuv[index];
            u = yuv[index + 1];
            y2 = yuv[index + 2];
            v = yuv[index + 3];

            YUV2RGB(y1, u, v, r1, g1, b1);
            YUV2RGB(y2, u, v, r2, g2, b2);

            index = line * width * 3 + column * 3;
            rgb[index] = r1;
            rgb[index + 1] = g1;
            rgb[index + 2] = b1;
            rgb[index + 3] = r2;
            rgb[index + 4] = g2;
            rgb[index + 5] = b2;
        }
    }
}

void RGBToRAW(unsigned char *rgb, unsigned char *raw, int width, int height)
{
    int index, line, column;

    for (line = 0; line < height; line++)
    {
        for (column = 0; column < width; column++)
        {
            index = line * width * 3 + column * 3;
            raw[index] = rgb[index + 2];
            raw[index + 1] = rgb[index + 1];
            raw[index + 2] = rgb[index];
        }
    }
}

int main()
{
    FILE *fp = fopen("yuv422.yuv", "rb");
    BITMAPFILEHEADER bmpFileHeader;
    BITMAPINFOHEADER bmpInfoHeader;
    RGBQUAD bmpQuad;
    unsigned char *yuvData = NULL;
    unsigned char *rgbData = NULL;
    unsigned char *rawData = NULL;
    int width = 640;
    int height = 480;
    int yuvSize = width * height * 2;
    int rgbSize = width * height * 3;
    int rawSize = width * height * 3;

    yuvData = (unsigned char *)malloc(yuvSize);
    rgbData = (unsigned char *)malloc(rgbSize);
    rawData = (unsigned char *)malloc(rawSize);

    fread(yuvData, 1, yuvSize, fp);
    fclose(fp);

    YUV422ToRGB(yuvData, rgbData, width, height);

    RGBToRAW(rgbData, rawData, width, height);

    fp = fopen("rawImage.raw", "wb");

    fwrite(rawData, 1, rawSize, fp);

    fclose(fp);

    free(yuvData);
    free(rgbData);
    free(rawData);

    return 0;
}

在上述代码中，YUV422 数据被读取，然后被转换为 RGB 数据，最后 RGB 数据被转换为 RAW 数据格式并保存到文件中。