Armadilloフォーラム

#include <stdio.h>
#include <stdlib.h>
#include <memory.h>
#include <jpeglib.h>
 
#define RAW_WIDTH	1920 // 2832 // 4k:3840 // fhd:1920
#define RAW_HEIGHT 	1080 // 4240 // 4k:2160 // fhd:1080
#define PIX_SIZE 	3 // RGB888
#define HEADER 	54 // header length
#define JPEG_QUALITY	10
 
char rgb_file[] = "/mnt/original.bmp";
char jpg_file[] = "/home/www-data/result.jpg";
 
int main() {
	struct jpeg_compress_struct cinfo;
	struct jpeg_error_mgr jerr;
	FILE *outfile;
	FILE *infile;
 
	JSAMPARRAY img;
    	int i, j;
 
	unsigned char *img_buf;
 
	img_buf = (unsigned char*)malloc(RAW_WIDTH *RAW_HEIGHT * 3 + HEADER);
 
	infile = fopen(rgb_file, "rb");
	fread(img_buf, PIX_SIZE, RAW_WIDTH * RAW_HEIGHT + HEADER, infile);
	fclose(infile);
 
	img = (JSAMPARRAY)malloc(sizeof(JSAMPROW) * RAW_HEIGHT);
	for(i = 0; i < RAW_HEIGHT; i++) {
		img[i] = (JSAMPROW)malloc(sizeof(JSAMPLE) * 3 * RAW_WIDTH);
		for(j = 0; j < RAW_WIDTH; j++) {
			int org_i = RAW_HEIGHT - i;	// if need to reverse virtial of original data
            		img[i][j * 3 + 0] = *(img_buf + HEADER + (org_i * RAW_WIDTH * 3 + j * 3 + 2)); // BGR to RGB
            		img[i][j * 3 + 1] = *(img_buf + HEADER + (org_i * RAW_WIDTH * 3 + j * 3 + 1)); // BGR to RGB
             		img[i][j * 3 + 2] = *(img_buf + HEADER + (org_i * RAW_WIDTH * 3 + j * 3 + 0)); // BGR to RGB
        	}
    	}
 
	free(img_buf);
 
    	cinfo.err = jpeg_std_error(&jerr);
    	jpeg_create_compress(&cinfo);
 
    	outfile = fopen(jpg_file, "wb");
    	jpeg_stdio_dest(&cinfo, outfile);
 
    	cinfo.image_width = RAW_WIDTH;
    	cinfo.image_height = RAW_HEIGHT;
    	cinfo.input_components = 3;		// RGB color
    	cinfo.in_color_space = JCS_RGB;	// RGB color
 
    	jpeg_set_defaults(&cinfo);
    	jpeg_set_quality(&cinfo, JPEG_QUALITY, TRUE);
 
    	jpeg_start_compress(&cinfo, TRUE);
    	jpeg_write_scanlines(&cinfo, img, RAW_HEIGHT);
    	jpeg_finish_compress(&cinfo);
    	jpeg_destroy_compress(&cinfo);
 
    	fclose(outfile);
 
    	for(i = 0; i < RAW_HEIGHT; i++) {
        	free(img[i]);
    	}
    	free(img);
}

atmark@atde5:~$ arm-linux-gnueabi-gcc rgb2jpeg.c -o rgb2jpeg -ljpeg

[root@armadillo440-0 (ttymxc1) ~]# chmod +x rgb2jpeg

[root@armadillo440-0 (ttymxc1) ~]# mount -t vfat /dev/sda1 /mnt

[root@armadillo440-0 (ttymxc1) ~]# mount -t tmpfs tmpfs /mnt
#実行後、/mntにoriginal.bmpを置く。

[root@armadillo440-0 (ttymxc1) ~]# ./rgb2jpeg

[root@armadillo440-0 (ttymxc1) ~]# free
             total         used         free       shared      buffers
Mem:        123204        35524        87680            0          520
-/+ buffers:              35004        88200

#define RAW_WIDTH	2832 // 2832 // 4k:3840 // fhd:1920
#define RAW_HEIGHT 	4240 // 4240 // 4k:2160 // fhd:1080
#define PIX_SIZE 	3 // RGB888
#define HEADER 	54 // header length
#define JPEG_QUALITY	10

[root@armadillo440-0 (ttymxc1) ~]# mount -t vfat /dev/sda1 /mnt

			int org_i = RAW_HEIGHT - i;	// if need to reverse virtial of original data
            		img[i][j * 3 + 0] = *(img_buf + HEADER + (org_i * RAW_WIDTH * 3 + j * 3 + 2)); // BGR to RGB
            		img[i][j * 3 + 1] = *(img_buf + HEADER + (org_i * RAW_WIDTH * 3 + j * 3 + 1)); // BGR to RGB
             		img[i][j * 3 + 2] = *(img_buf + HEADER + (org_i * RAW_WIDTH * 3 + j * 3 + 0)); // BGR to RGB

atmark@atde5:~$ git clone https://github.com/bitbank2/JPEGENC.git

atmark@atde5:~$ cd JPEGENC
atmark@atde5:~/JPEGENC$ cat jpegenc_readbmp-memsave.patch | patch -p1

atmark@atde5:~/JPEGENC$ cd linux
atmark@atde5:~/JPEGENC/linux$ CC=arm-linux-gnueabi-gcc CXX=arm-linux-gnueabi-g++ make

[root@armadillo440-0 (ttymxc1) ~]# ./jpegenc /mnt/test.bmp /mnt/test.jpg