vc.rar_jpeg VC_jpeg c_jpeg 嵌入式_libjpeg uc_转图BMP

//#include "stdafx.h" #include<stdio.h> #include "memory.h" #include<stdlib.h> //#include "string.h" extern "C" { #include "jpeglib.h" } #pragma comment(lib, "libjpeg/libjpeg.lib") #define IMAGESIZE 452400 typedef unsigned long DWORD; typedef int BOOL; typedef unsigned char BYTE; typedef unsigned short WORD; typedef long LONG; typedef struct tagBITMAPFILEHEADER { WORD bfType; WORD bfSizeL; WORD bfSizeH; WORD bfReserved1; WORD bfReserved2; WORD bfOffBitsL; WORD bfOffBitsH; } BITMAPFILEHEADER; typedef struct tagRGBQUAD { BYTE rgbBlue; BYTE rgbGreen; BYTE rgbRed; BYTE rgbReserved; } RGBQUAD; typedef struct tagBITMAPINFOHEADER{ DWORD biSize; LONG biWidth; LONG biHeight; WORD biPlanes; WORD biBitCount; DWORD biCompression; DWORD biSizeImage; LONG biXPelsPerMeter; LONG biYPelsPerMeter; DWORD biClrUsed; DWORD biClrImportant; DWORD biR; DWORD biG; DWORD biB; DWORD biempty; } BITMAPINFOHEADER; typedef struct tagBITMAPINFO { BITMAPINFOHEADER bmiHeader; RGBQUAD bmiColors[1]; } BITMAPINFO; /*********************************************** *解压缩jpeg到bmp格式 *对于灰度图和24位图，图像解压后正常 *对于256色索引位图，图像解压后为灰度图 **************************************************/ void jpgtobmp(const char *strSourceFileName, const char *strDestFileName) { BITMAPFILEHEADER bfh; // bmp文件头 BITMAPINFOHEADER bih; // bmp头信息 RGBQUAD rq[256]; // 调色板 DWORD bfSize; DWORD bfOffBits; WORD RGB; printf("%d \n",sizeof(bfh)); BYTE *data= NULL;//new BYTE[bih.biWidth*bih.biHeight]; BYTE *data16 = NULL; // WORD *data16 = NULL; //BYTE *pDataConv = NULL;//new BYTE[bih.biWidth*bih.biHeight]; int nComponent = 0; // 声明解压缩对象及错误信息管理器 struct jpeg_decompress_struct cinfo; struct jpeg_error_mgr jerr; cinfo.err = jpeg_std_error(&jerr); jpeg_create_decompress(&cinfo); FILE *f = fopen(strSourceFileName,"rb"); if (f==NULL) { printf("Open file error!\n"); return; } // jpeg_stdio_src(&cinfo, f); jpeg_read_header(&cinfo, TRUE); data = new BYTE[cinfo.image_width*cinfo.image_height*3]; data16 = new BYTE[cinfo.image_width*cinfo.image_height*2]; // data16 = new WORD[cinfo.image_width*cinfo.image_height]; jpeg_start_decompress(&cinfo); JSAMPROW row_pointer[1]; while (cinfo.output_scanline < cinfo.output_height) { row_pointer[0] = &data[(cinfo.output_height - cinfo.output_scanline-1)*cinfo.image_width*cinfo.num_components]; jpeg_read_scanlines(&cinfo,row_pointer , 1); } jpeg_finish_decompress(&cinfo); jpeg_destroy_decompress(&cinfo); fclose(f); f=fopen(strDestFileName,"wb"); if (f==NULL) { delete [] data; //delete [] pDataConv; return; } // 写文件头 memset(&bfh,0,sizeof(bfh)); bfSize = sizeof(bfh)+sizeof(bih); printf("%d \n",sizeof(bih)); bfh.bfSizeH = bfSize/65536; bfh.bfSizeL = bfSize%65536; bfOffBits = sizeof(bfh)+sizeof(bih); bfh.bfOffBitsH = bfOffBits/65536; bfh.bfOffBitsL = bfOffBits%65536; if (cinfo.num_components==1) { bfOffBits += 1024; bfh.bfOffBitsH = bfOffBits/65536; bfh.bfOffBitsL = bfOffBits%65536; bfSize += 1024; bfh.bfSizeH = bfSize/65536; bfh.bfSizeL = bfSize%65536; } else{ bfSize += cinfo.image_width*cinfo.image_height*cinfo.num_components; bfh.bfSizeH = bfSize/65536; bfh.bfSizeL = bfSize%65536; } bfh.bfType = 0x4d42; fwrite(&bfh,sizeof(bfh),1,f); // 写图像信息 bih.biBitCount = 16; bih.biSize = sizeof(bih); bih.biWidth = cinfo.image_width; bih.biHeight = cinfo.image_height; bih.biPlanes = 1; bih.biCompression = 3; bih.biSizeImage = cinfo.image_width*cinfo.image_height*2; bih.biXPelsPerMeter = 0; bih.biYPelsPerMeter = 0; bih.biClrUsed = 0; bih.biClrImportant = 0; bih.biR=0xf800; bih.biG=0x7e0; bih.biB=0x1f; bih.biempty= 0; fwrite(&bih,sizeof(bih),1,f); // 写调色板 if (bih.biBitCount==8) { for (int i=0;i<256;i++) { rq[i].rgbBlue =i; rq[i].rgbGreen = i; rq[i].rgbRed = i; rq[i].rgbReserved = 0; } fwrite(rq,1024,1,f); } if (bih.biBitCount==16) { for(int i = 0;i<bih.biWidth*bih.biHeight;i++) { BYTE red = data[i*3]; data[i*3] = data[i*3+2]; data[i*3+2] = red; // printf("%x \n",data[i]); } for(int j = 0;j<bih.biWidth*bih.biHeight;j++) { RGB = (data[j*3]>>3) | (data[j*3+1]>>2)<<5 | (data[j*3+2]>>3)<<11; // printf("%x",RGB); data16[j*2] = RGB%256; data16[j*2+1] = RGB/256; } fwrite(data16,cinfo.image_width*cinfo.image_height*2,1,f); } if (bih.biBitCount==24) { // 调整rgb顺序 for (int i = 0;i<bih.biWidth*bih.biHeight;i++) { BYTE red = data[i*3]; data[i*3] = data[i*3+2]; data[i*3+2] = red; } fwrite(data,cinfo.image_width*cinfo.image_height*3,1,f); } fclose(f); delete [] data; delete [] data16; } int main() { jpgtobmp("1.jpg","2.bmp"); return 0; }