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read from stdin, write to stdout

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main
phani 5 years ago
parent 03f70a904b
commit 1b875f6d70
4 changed files with 81 additions and 58 deletions
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2
get_time.h
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@ -37,7 +37,7 @@ print_time(unsigned long long s, unsigned long long e)
#if 0
printf("%llu cycs, %llu us\n", e - s, (e - s) / CPU_FREQ);
#else
printf("%llu us\n", e - s);
fprintf(stderr, "%llu us\n", e - s);
#endif
}

59
samples/license_plate_detection.c
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@ -49,37 +49,49 @@ static int filter_cb(int width, int height)
}
return 1; /* Accepted region */
}
#define MAX_IMG_SIZE (1024*1024)
int main(int argc, char *argv[])
{
struct stat stbf;
// struct stat stbf;
unsigned char *zInpbuf = NULL;
unsigned long long s = get_time(), e;
/* Input image (pass a path or use the test image shipped with the samples ZIP archive) */
const char *zInput = argc > 1 ? argv[1] : "./plate.jpg";
/* Processed output image path */
const char *zOut = argc > 2 ? argv[2] : "./out_plate.jpg";
int r = stat(zInput, &stbf);
if (r < 0) {
perror("stat");
return -1;
}
zInpbuf = malloc(stbf.st_size);
//memset(zInpbuf, 0, stbf.st_size);
int zIfd = open(zInput, O_RDONLY);
if (zIfd < 0) {
perror("open");
return -1;
}
r = read(zIfd, zInpbuf, stbf.st_size);
if (r < stbf.st_size) {
perror("read");
// const char *zInput = argc > 1 ? argv[1] : "./plate.jpg";
// /* Processed output image path */
// const char *zOut = argc > 2 ? argv[2] : "./out_plate.jpg";
// int r = stat(zInput, &stbf);
// if (r < 0) {
// perror("stat");
// return -1;
// }
// zInpbuf = malloc(stbf.st_size);
// //memset(zInpbuf, 0, stbf.st_size);
// int zIfd = open(zInput, O_RDONLY);
// if (zIfd < 0) {
// perror("open");
// return -1;
// }
// r = read(zIfd, zInpbuf, stbf.st_size);
// if (r < stbf.st_size) {
// perror("read");
// return -1;
// }
// close(zIfd);
zInpbuf = malloc(MAX_IMG_SIZE);
if (!zInpbuf) return -1;
size_t zImgSz = read(0, zInpbuf, MAX_IMG_SIZE);
if (zImgSz <= 0) {
if (zImgSz < 0) perror("read");
free(zInpbuf);
return -1;
}
close(zIfd);
/* Load the input image in the grayscale colorspace */
//sod_img imgIn = sod_img_load_grayscale(zInput);
sod_img imgIn = sod_img_load_from_mem(zInpbuf, stbf.st_size, SOD_IMG_GRAYSCALE);
sod_img imgIn = sod_img_load_from_mem(zInpbuf, zImgSz, SOD_IMG_GRAYSCALE);
if (imgIn.data == 0) {
/* Invalid path, unsupported format, memory failure, etc. */
puts("Cannot load input image..exiting");
@ -89,7 +101,7 @@ int main(int argc, char *argv[])
* marking the plate in question if any.
*/
//sod_img imgCopy = sod_img_load_color(zInput);
sod_img imgCopy = sod_img_load_from_mem(zInpbuf, stbf.st_size, SOD_IMG_COLOR);
sod_img imgCopy = sod_img_load_from_mem(zInpbuf, zImgSz, SOD_IMG_COLOR);
/* Obtain a binary image first */
sod_img binImg = sod_threshold_image(imgIn, 0.5);
/*
@ -115,13 +127,14 @@ int main(int argc, char *argv[])
}
sod_image_blob_boxes_release(box);
/* Finally save the output image to the specified path */
sod_img_save_as_jpeg(imgCopy, zOut, 0);
sod_img_save_as_jpeg(imgCopy, NULL, 0);
/* Cleanup */
sod_free_image(imgIn);
sod_free_image(cannyImg);
sod_free_image(binImg);
sod_free_image(dilImg);
sod_free_image(imgCopy);
free(zInpbuf);
e = get_time();
print_time(s, e);
return 0;

66
samples/resize_image.c
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@ -31,44 +31,53 @@
#include <stdlib.h>
#include "sod.h"
#include "get_time.h"
#define MAX_IMG_SZ (1024*1024) //1MB
/*
* Resize an image (Minify) to half its original size.
*/
int main(int argc, char *argv[])
{
struct stat stbf;
// struct stat stbf;
size_t imgSz = 0;
unsigned char *zInpbuf = NULL;
unsigned long long s = get_time(), e;
/* Input image (pass a path or use the test image shipped with the samples ZIP archive) */
const char *zInput = argc > 1 ? argv[1] : "./flower.jpg";
/* Processed output image path */
const char *zOut = argc > 2 ? argv[2] : "./out_rz.png";
/* Load the input image in full color */
int r = stat(zInput, &stbf);
if (r < 0) {
perror("stat");
return -1;
}
zInpbuf = malloc(stbf.st_size);
//memset(zInpbuf, 0, stbf.st_size);
int zIfd = open(zInput, O_RDONLY);
if (zIfd < 0) {
perror("open");
return -1;
}
r = read(zIfd, zInpbuf, stbf.st_size);
if (r < stbf.st_size) {
perror("read");
return -1;
}
close(zIfd);
// /* Input image (pass a path or use the test image shipped with the samples ZIP archive) */
// const char *zInput = argc > 1 ? argv[1] : "./flower.jpg";
// /* Processed output image path */
// const char *zOut = argc > 2 ? argv[2] : "./out_rz.png";
// /* Load the input image in full color */
// int r = stat(zInput, &stbf);
// if (r < 0) {
// perror("stat");
// return -1;
// }
// zInpbuf = malloc(stbf.st_size);
// //memset(zInpbuf, 0, stbf.st_size);
// int zIfd = open(zInput, O_RDONLY);
// if (zIfd < 0) {
// perror("open");
// return -1;
// }
// r = read(zIfd, zInpbuf, stbf.st_size);
// if (r < stbf.st_size) {
// perror("read");
// return -1;
// }
// close(zIfd);
zInpbuf = malloc(MAX_IMG_SZ);
if (!zInpbuf) return -1;
imgSz = read(0, zInpbuf, MAX_IMG_SZ);
if (imgSz <= 0) return -1;
// sod_img imgIn = sod_img_load_from_file(zInput, SOD_IMG_COLOR /* full color channels */);
sod_img imgIn = sod_img_load_from_mem(zInpbuf, stbf.st_size, SOD_IMG_COLOR /* full color channels */);
sod_img imgIn = sod_img_load_from_mem(zInpbuf, imgSz, SOD_IMG_COLOR /* full color channels */);
if (imgIn.data == 0) {
/* Invalid path, unsupported format, memory failure, etc. */
puts("Cannot load input image..exiting");
return 0;
//puts("Cannot load input image..exiting");
printf("Error loading input\n");
free(zInpbuf);
return -1;
}
/* Resize to half its original size */
int newWidth = imgIn.w / 2;
@ -76,11 +85,12 @@ int main(int argc, char *argv[])
sod_img rz = sod_resize_image(imgIn, newWidth, newHeight);
/* Save the resized image to the specified path */
sod_img_save_as_png(rz, zOut);
sod_img_save_as_png(rz, NULL);
//sod_img_save_as_jpeg(rz, zOut, 0);
/* Cleanup */
sod_free_image(imgIn);
sod_free_image(rz);
free(zInpbuf);
e = get_time();
print_time(s, e);
return 0;

12
sod_img_writer.h
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@ -293,12 +293,12 @@ static void stbi__stdio_write(void *context, void *data, int size)
static int stbi__start_write_file(stbi__write_context *s, const char *filename)
{
FILE *f;
FILE *f = stdout;
#ifdef STBI_MSC_SECURE_CRT
if (fopen_s(&f, filename, "wb"))
if (filename && fopen_s(&f, filename, "wb"))
f = NULL;
#else
f = fopen(filename, "wb");
if (filename) f = fopen(filename, "wb");
#endif
stbi__start_write_callbacks(s, stbi__stdio_write, (void *)f);
return f != NULL;
@ -1137,15 +1137,15 @@ unsigned char *stbi_write_png_to_mem(unsigned char *pixels, int stride_bytes, in
#ifndef STBI_WRITE_NO_STDIO
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
{
FILE *f;
FILE *f = stdout;
int len;
unsigned char *png = stbi_write_png_to_mem((unsigned char *)data, stride_bytes, x, y, comp, &len);
if (png == NULL) return 0;
#ifdef STBI_MSC_SECURE_CRT
if (fopen_s(&f, filename, "wb"))
if (filename && fopen_s(&f, filename, "wb"))
f = NULL;
#else
f = fopen(filename, "wb");
if (filename) f = fopen(filename, "wb");
#endif
if (!f) { STBIW_FREE(png); return 0; }
fwrite(png, 1, len, f);

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