C语言作业-基于Socket套接字在两台Linux机器之间传输bmp图像源码.zip

#include <stdio.h> #include <string.h> #include <stdlib.h> #include <stdint.h> #include <jpeglib.h> #include "bitmapHead.h" #define JPEG_QUALITY 90 //图片压缩质量 //读取文件头 int readFileHeader(FILE *fp, bmpFileHeader *bfHeader) { fseek(fp, 0, SEEK_SET); fread(bfHeader, sizeof(bmpFileHeader), 1, fp); int i; printf("读入文件头："); char *p = (char *)bfHeader; for (i = 0; i < sizeof(bmpFileHeader); i++, p++) { printf("%02x ", *p); } printf("\n"); printf("文件头信息如下：\n"); printf("文件大小: %d 字节\n", bfHeader->bfSize); printf("位图数据偏移：%d\n", bfHeader->bfOffBits); return 0; } //读取信息头 int readInfoHeader(FILE *fp, bmpInfoHeader *biHeader) { fseek(fp, 14, SEEK_SET); fread(biHeader, sizeof(bmpInfoHeader), 1, fp); int i; printf("读入位图信息头：\n"); char *p = (char *)biHeader; for (i = 0; i < sizeof(bmpInfoHeader); i++, p++) { printf("%02x ", *p); if (i % 20 == 0 && i != 0) printf("\n"); } printf("\n"); printf("位图信息头信息如下：\n"); printf("bmp图像宽度：%d\n", biHeader->biWidth); printf("bmp图像高度：%d\n", biHeader->biHeight); printf("bmp图像颜色位数: %d\n", biHeader->biBitCount); printf("bmp图像实际数据占用字节：%d\n", biHeader->biSizeImage); return 0; } // bmp转jpeg(bmpName,jpegName,bmpWidth,bmpHeight) int BmpToJpeg(char *bmp_file, char *jpeg_file, int width, int height, int bitCount) { FILE *fd; // bmp文件 struct jpeg_compress_struct cinfo; //创建代表压缩的结构体 struct jpeg_error_mgr jerr; // jpeg默认错误处理结构体 FILE *outfile; //输出文件 // BMP数据默认是（biHeight>0) //但偶尔也会出现biHeight<0，图片数据倒置的情况。 int flag = 1; //是否逆序 if (height < 0) { height = -height; flag = -1; //逆序存储 } long sizeImage = width * height * bitCount / 8; //文件大小 unsigned char *data; //数据空间 data = (unsigned char *)malloc(sizeImage); fd = fopen(bmp_file, "rb"); if (!fd) { printf("ERROR1:无法打开bmp文件，请检查路径是否正确!\n"); free(data); exit(0); return -1; } fseek(fd, 54, SEEK_SET); //跳过文件头和信息头 int ret = fread(data, sizeImage, 1, fd); if (ret == 0 && ferror(fd)) { printf("ERROT2:无法读取bmp文件!\n"); free(data); fclose(fd); return -1; } //初始化jpeg压缩对象 cinfo.err = jpeg_std_error(&jerr); jpeg_create_compress(&cinfo); if ((outfile = fopen(jpeg_file, "wb")) == NULL) { //错误信息输出到文件中 fprintf(stderr, "无法打开(创建) %s\n", jpeg_file); return -1; } jpeg_stdio_dest(&cinfo, outfile); //指定压缩后的图像存放的目标文件 cinfo.image_height = height; //压缩后的宽度高度，像素为单位 cinfo.image_width = width; cinfo.input_components = 3; //颜色分量 cinfo.in_color_space = JCS_YCbCr; //设置色彩空间 //设置压缩参数 jpeg_set_defaults(&cinfo); jpeg_set_quality(&cinfo, JPEG_QUALITY, TRUE); //设置图片压缩质量 jpeg_start_compress(&cinfo, TRUE); //设置压缩入口 JSAMPROW *row_pointer; //图像像素的每一行 row_pointer = malloc(height * width * 3); if (flag == -1) //逆序 { long rgb_index = 0; //定义bmp像素访问索引 for (int i = 0; i < height; i++) { unsigned char *lineData = NULL; //定义这一行的像素 lineData = malloc(width * 3); //开空间 for (int j = 0; j < width; j++) { // YCrCb色彩空间 lineData[j * 3 + 2] = 0.5 * data[rgb_index + 2] - 0.4178 * data[rgb_index + 1] - 0.0831 * data[rgb_index] + 128; lineData[j * 3 + 1] = -0.1687 * data[rgb_index + 2] - 0.3313 * data[rgb_index + 1] + 0.5 * data[rgb_index] + 128; lineData[j * 3 + 0] = 0.299 * data[rgb_index + 2] + 0.587 * data[rgb_index + 1] + 0.114 * data[rgb_index]; rgb_index += 3; if (bitCount == 32) { rgb_index++; //跳过Alpha通道 } } //如果是24位真彩图而且宽度不是4的倍数，需要跳过最后补了的无用像素 if ((width * bitCount / 8) % 4) { rgb_index += width % 4; } row_pointer[i] = lineData; //设置第i行像素 } } else if (flag == 1) //不逆序 { long rgb_index = 0; //定义bmp像素访问索引 for (int i = height - 1; i >= 0; i--) { unsigned char *lineData = NULL; //定义这一行的像素 lineData = malloc(width * 3); //开空间 for (int j = 0; j < width; j++) { // YCrCb色彩空间 lineData[j * 3 + 2] = 0.5 * data[rgb_index + 2] - 0.4178 * data[rgb_index + 1] - 0.0831 * data[rgb_index] + 128; lineData[j * 3 + 1] = -0.1687 * data[rgb_index + 2] - 0.3313 * data[rgb_index + 1] + 0.5 * data[rgb_index] + 128; lineData[j * 3 + 0] = 0.299 * data[rgb_index + 2] + 0.587 * data[rgb_index + 1] + 0.114 * data[rgb_index]; rgb_index += 3; if (bitCount == 32) { rgb_index++; //跳过Alpha通道 } } //如果是24位真彩图而且宽度不是4的倍数，需要跳过最后补了的无用像素 if ((width * bitCount / 8) % 4) { rgb_index += width % 4; } row_pointer[i] = lineData; //设置第i行像素 } } jpeg_write_scanlines(&cinfo, row_pointer, height); //输出每一行像素 jpeg_finish_compress(&cinfo); jpeg_destroy_compress(&cinfo); //释放空间 free(row_pointer); free(data); fclose(fd); fclose(outfile); return 0; } void bmp2jpeg(char *input_name, char *output_name) { FILE *fp; fp = fopen(input_name, "rb"); if (fp == NULL) { printf("打开bmp文件失败\n"); exit(0); } //输出信息 // bmpFileHeader bf; // bmpInfoHeader bi; // readFileHeader(fp,&bf); // readInfoHeader(fp,&bi); bmpFileHeader bfHeader; //文件头 fseek(fp, 0, SEEK_SET); fread(&bfHeader, sizeof(bmpFileHeader), 1, fp); bmpInfoHeader biHeader; //信息头 fseek(fp, 14, SEEK_SET); fread(&biHeader, sizeof(bmpInfoHeader), 1, fp); fseek(fp, 0, SEEK_SET); BmpToJpeg(input_name, output_name, biHeader.biWidth, biHeader.biHeight, biHeader.biBitCount); }