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void SaveBMP ( BYTE* data, int w, int h )  // data指代的是解码后的原始数据，格式为：NV12

{ FILE *f; unsigned char *img = NULL; int filesize = 54 + 3*w*h;          //w is your image width, h is image height, both int if( img )  { free( img ); }

img = (unsigned char *)malloc(3*w*h); memset(img,0,sizeof(img)); for(int j=0; j<h; j++) { for(int i=0; i<w; i++) { unsigned char r,g,b; r = data[(((j*w)+i)*4)+2]; g = data[(((j*w)+i)*4)+1]; b = data[(((j*w)+i)*4)+0]; img[(((j*w)+i)*3)+2] = (r); img[(((j*w)+i)*3)+1] = (g); img[(((j*w)+i)*3)+0] = (b); } } unsigned char bmpfileheader[14] = {'B','M', 0,0,0,0, 0,0, 0,0, 54,0,0,0}; unsigned char bmpinfoheader[40] = {40,0,0,0, 0,0,0,0, 0,0,0,0, 1,0, 24,0}; unsigned char bmppad[3] = {0,0,0}; bmpfileheader[ 2] = (unsigned char)(filesize    ); bmpfileheader[ 3] = (unsigned char)(filesize>> 8); bmpfileheader[ 4] = (unsigned char)(filesize>>16); bmpfileheader[ 5] = (unsigned char)(filesize>>24); bmpinfoheader[ 4] = (unsigned char)(       w    ); bmpinfoheader[ 5] = (unsigned char)(       w>> 8); bmpinfoheader[ 6] = (unsigned char)(       w>>16); bmpinfoheader[ 7] = (unsigned char)(       w>>24); bmpinfoheader[ 8] = (unsigned char)(       h    ); bmpinfoheader[ 9] = (unsigned char)(       h>> 8); bmpinfoheader[10] = (unsigned char)(       h>>16); bmpinfoheader[11] = (unsigned char)(       h>>24);         g_FrameCapFile[] = "framecap.bmp"; //保存的图片名称 f = fopen(g_FrameCapFile,"wb");    fwrite(bmpfileheader,1,14,f); fwrite(bmpinfoheader,1,40,f); for(int i=0; i<h; i++) { fwrite(img+(w*(h-i-1)*3),3,w,f); fwrite(bmppad,1,(4-(w*3)%4)%4,f); } fclose(f); printf("saved frame capture file width = %d, height = %d\n", w, h); }

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