some folder structure
This commit is contained in:
ItsMAX0112
parent
0e52435d9b
commit
7998ff391d
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#include <iostream>
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#include "important.h"
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#include <cstdint>
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#include <chrono>
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#include <fstream>
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using namespace std;
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struct image_t *S1_smoothen(struct image_t *input_image)
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{
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// cout << input_image->width << input_image->height << " " << input_image->image_pixels << endl;
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int width = input_image->width;
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int height = input_image->height;
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// memory allocation
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struct image_t *smoother = new struct image_t;
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smoother->height = height;
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smoother->width = width;
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smoother->image_pixels = new uint8_t **[height];
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for (int i = 0; i < height; i++)
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{
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smoother->image_pixels[i] = new uint8_t *[width];
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for (int j = 0; j < width; j++)
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smoother->image_pixels[i][j] = new uint8_t[3];
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}
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for (int i = 1; i < height - 1; i++)
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{
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for (int j = 1; j < width - 1; j++)
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{
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for (int k = 0; k < 3; k++)
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{
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// image->image_pixels[i][j][k] = val;
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// edge cases
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if (i == 0 && j == 0)
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{ // i-1 and j - 1 doesnt exist
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smoother->image_pixels[i][j][k] = (input_image->image_pixels[i][j][k] / 4 + input_image->image_pixels[i][j + 1][k] / 4 + input_image->image_pixels[i + 1][j][k] / 4 + input_image->image_pixels[i + 1][j + 1][k] / 4);
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}
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else if (i == height - 1 && j == 0)
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{ // i+1 and j-1 does not exist
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smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j][k] / 4 + input_image->image_pixels[i - 1][j + 1][k] / 4 + input_image->image_pixels[i][j][k] / 4 + input_image->image_pixels[i][j + 1][k] / 4);
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}
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else if (i == 0 && j == width - 1)
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{ // i-1 and j+1 does not exist
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smoother->image_pixels[i][j][k] = (input_image->image_pixels[i][j - 1][k] / 4 + input_image->image_pixels[i][j][k] / 4 + input_image->image_pixels[i + 1][j - 1][k] / 4 + input_image->image_pixels[i + 1][j][k] / 4);
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}
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else if (i == height - 1 && j == width - 1)
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{ // i+1 and j+1 does not exist
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smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j - 1][k] / 4 + input_image->image_pixels[i - 1][j][k] / 4 + input_image->image_pixels[i][j - 1][k] / 4 + input_image->image_pixels[i][j][k] / 4);
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}
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else if (i == 0)
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{ // i - 1 does not exist
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smoother->image_pixels[i][j][k] = (input_image->image_pixels[i][j - 1][k] / 6 + input_image->image_pixels[i][j][k] / 6 + input_image->image_pixels[i][j + 1][k] / 6 + input_image->image_pixels[i + 1][j - 1][k] / 6 + input_image->image_pixels[i + 1][j][k] / 6 + input_image->image_pixels[i + 1][j + 1][k] / 6);
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}
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else if (j == 0)
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{ // j -1 does not exist
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smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j][k] / 6 + input_image->image_pixels[i - 1][j + 1][k] / 6 + input_image->image_pixels[i][j][k] / 6 + input_image->image_pixels[i][j + 1][k] / 6 + input_image->image_pixels[i + 1][j][k] / 6 + input_image->image_pixels[i + 1][j + 1][k] / 6);
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}
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else if (i == height - 1)
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{ // i+1 does not exist
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smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j - 1][k] / 6 + input_image->image_pixels[i - 1][j][k] / 6 + input_image->image_pixels[i - 1][j + 1][k] / 6 + input_image->image_pixels[i][j - 1][k] / 6 + input_image->image_pixels[i][j][k] / 6 + input_image->image_pixels[i][j + 1][k] / 6);
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}
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else if (j == width - 1)
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{ // j + 1 does not exist
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smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j - 1][k] / 6 + input_image->image_pixels[i - 1][j][k] / 6 + input_image->image_pixels[i][j - 1][k] / 6 + input_image->image_pixels[i][j][k] / 6 + input_image->image_pixels[i + 1][j - 1][k] / 6 + input_image->image_pixels[i + 1][j][k] / 6);
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}
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else
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{
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smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j - 1][k] / 9 + input_image->image_pixels[i - 1][j][k] / 9 + input_image->image_pixels[i - 1][j + 1][k] / 9 + input_image->image_pixels[i][j - 1][k] / 9 + input_image->image_pixels[i][j][k] / 9 + input_image->image_pixels[i][j + 1][k] / 9 + input_image->image_pixels[i + 1][j - 1][k] / 9 + input_image->image_pixels[i + 1][j][k] / 9 + input_image->image_pixels[i + 1][j + 1][k] / 9);
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}
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}
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}
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}
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return smoother;
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}
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struct image_t *S2_find_details(struct image_t *input_image, struct image_t *smoothened_image)
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{
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// TODO
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int width = input_image->width;
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int height = input_image->height;
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struct image_t *details = new struct image_t;
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details->height = height;
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details->width = width;
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details->image_pixels = new uint8_t **[height];
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for (int i = 0; i < height; i++)
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{
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details->image_pixels[i] = new uint8_t *[width];
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for (int j = 0; j < width; j++)
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details->image_pixels[i][j] = new uint8_t[3];
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}
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for (int i = 1; i < height - 1; i++)
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{
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for (int j = 1; j < width - 1; j++)
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{
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for (int k = 0; k < 3; k++)
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{
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details->image_pixels[i][j][k] = max(0, input_image->image_pixels[i][j][k] - smoothened_image->image_pixels[i][j][k]);
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}
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}
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}
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return details;
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}
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struct image_t *S3_sharpen(struct image_t *input_image, struct image_t *details_image)
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{
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// TODO
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int width = input_image->width;
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int height = input_image->height;
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int a = 1;
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struct image_t *sharp = new struct image_t;
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sharp->height = height;
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sharp->width = width;
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sharp->image_pixels = new uint8_t **[height];
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for (int i = 0; i < height; i++)
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{
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sharp->image_pixels[i] = new uint8_t *[width];
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for (int j = 0; j < width; j++)
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sharp->image_pixels[i][j] = new uint8_t[3];
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}
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for (int i = 1; i < height - 1; i++)
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{
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for (int j = 1; j < width - 1; j++)
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{
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for (int k = 0; k < 3; k++)
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{
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sharp->image_pixels[i][j][k] = min(255, input_image->image_pixels[i][j][k] + details_image->image_pixels[i][j][k]) * a;
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}
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}
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}
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return sharp; // TODO remove this line when adding your code
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}
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uint8_t skip_blanks_comments_while_reading(ifstream *read_stream) // returns the byte at the first position after the skipping of the blank space
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{
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uint8_t val;
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while (true)
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{
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val = read_stream->get();
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if (val == '#')
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{
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while (val != '\n')
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{
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val = read_stream->get();
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}
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}
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if (val == '\n' || val == ' ' || val == '\t')
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{
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continue;
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}
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else if (val != '#')
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return val;
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}
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return val;
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}
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struct image_t *read_ppm_file(char *path_to_input_file)
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{
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// cout << "input image file = " << path_to_input_file << "\n";
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ifstream read_stream(path_to_input_file, ios::binary | ios::in);
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if (read_stream.is_open())
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{
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struct image_t *image = new struct image_t;
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uint8_t val = skip_blanks_comments_while_reading(&read_stream); // 'P'
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val = read_stream.get(); //'6'
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// width
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val = skip_blanks_comments_while_reading(&read_stream);
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while (true)
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{
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if (val == ' ' || val == '\t' || val == '\n')
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break;
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image->width = image->width * 10 + (val - '0');
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val = read_stream.get();
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}
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// cout << "width = " << image->width << "\n";
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// height
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val = skip_blanks_comments_while_reading(&read_stream);
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while (true)
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{
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if (val == ' ' || val == '\t' || val == '\n')
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break;
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image->height = image->height * 10 + (val - '0');
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val = read_stream.get();
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}
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// cout << "height = " << image->height << "\n";
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image->image_pixels = new uint8_t **[image->height];
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for (int i = 0; i < image->height; i++)
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{
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image->image_pixels[i] = new uint8_t *[image->width];
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for (int j = 0; j < image->width; j++)
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image->image_pixels[i][j] = new uint8_t[3];
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}
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// maxval
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val = skip_blanks_comments_while_reading(&read_stream);
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while (true)
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{
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if (val == ' ' || val == '\t' || val == '\n')
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break;
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val = read_stream.get();
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}
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// get pixel values
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val = skip_blanks_comments_while_reading(&read_stream);
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for (int i = 0; i < image->height; i++)
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{
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for (int j = 0; j < image->width; j++)
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{
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for (int k = 0; k < 3; k++)
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{
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image->image_pixels[i][j][k] = val;
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val = read_stream.get(); // assuming maxval of <=255
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}
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}
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}
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// read_stream.seekg(-1, ios_base::cur);
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// read_stream.read(((char*)image->image_pixels), image->height * image->width * 3); //assuming maxval of <=255
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read_stream.close();
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return image;
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}
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else
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{
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cerr << "failed to open file " << path_to_input_file << "\n\n";
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exit(1);
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}
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}
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void write_ppm_file(char *path_to_output_file, struct image_t *image)
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{
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// cout << "output image file = " << path_to_output_file << "\n";
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ofstream write_stream(path_to_output_file, ios::binary | ios::out);
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if (write_stream.is_open())
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{
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write_stream.write("P6\n", 3);
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std::string width_string = std::to_string(image->width);
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// cout << "width = " << width_string << "\n";
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write_stream.write(width_string.c_str(), width_string.length());
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write_stream.write(" ", 1);
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std::string height_string = std::to_string(image->height);
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// cout << "height = " << height_string << "\n";
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write_stream.write(height_string.c_str(), height_string.length());
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write_stream.write("\n255\n", 5);
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for (int i = 0; i < image->height; i++)
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{
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for (int j = 0; j < image->width; j++)
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{
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for (int k = 0; k < 3; k++)
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{
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write_stream.put(image->image_pixels[i][j][k]); // assuming maxval of <=255
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}
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}
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}
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// write_stream.write(((char*)image->image_pixels), image->height * image->width * 3);
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write_stream.close();
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}
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else
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{
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cerr << "failed to open file " << path_to_output_file << "\n\n";
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exit(1);
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}
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}
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@ -0,0 +1,19 @@
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#ifndef IMPORTANT_H
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#define IMPORTANT_H
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#include <cstdint>
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struct image_t
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{
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int width;
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int height;
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uint8_t*** image_pixels;
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};
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struct image_t* S1_smoothen(struct image_t *input_image);
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struct image_t* S2_find_details(struct image_t *input_image, struct image_t *smoothened_image);
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struct image_t* S3_sharpen(struct image_t *input_image, struct image_t *details_image);
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struct image_t* read_ppm_file(char* path_to_input_file);
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void write_ppm_file(char* path_to_output_file, struct image_t* image);
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#endif
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@ -1,254 +0,0 @@
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#include "important.h"
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#include <iostream>
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#include <cstdint>
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#include <chrono>
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#include <fstream>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include<sys/mman.h>
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#include<sys/stat.h>
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#include<fcntl.h>
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#include<semaphore.h>
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using namespace std;
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int main(int argc, char *argv[]) {
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// if(argc != 3)
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// {
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// cout << "usage: ./a.out <path-to-original-image> <path-to-transformed-image>\n\n";
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// exit(0);
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// }
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// struct image_t *input_image = read_ppm_file(argv[1]);
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const char *shm1_name = "/shm_parent_child";
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const char *shm2_name = "/shm_child_grandchild";
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const char *sem1_name = "/sem_parent_child";
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const char *sem2_name = "/sem_child_grandchild";
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int shm_fd = shm_open(shm1_name, O_CREAT | O_RDWR, 0666);
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if (shm_fd == -1) {
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perror("shm_open");
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|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Resize the shared memory object to the desired size
|
|
||||||
if (ftruncate(shm_fd, size) == -1) {
|
|
||||||
perror("ftruncate");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Map the shared memory object into the process address space
|
|
||||||
void *ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, shm_fd, 0);
|
|
||||||
if (ptr == MAP_FAILED) {
|
|
||||||
perror("mmap");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
sem_t *sem_parent_child = sem_open(sem1_name, O_CREAT, 0666, 0); // Initially locked (0)
|
|
||||||
sem_t *sem_child_grandchild = sem_open(sem2_name, O_CREAT, 0666, 0); // Initially locked (0)
|
|
||||||
|
|
||||||
if (sem_parent_child == SEM_FAILED || sem_child_grandchild == SEM_FAILED) {
|
|
||||||
perror("sem_open failed");
|
|
||||||
exit(EXIT_FAILURE);
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
// size_t size = input_image->height * input_image->width * 3 * sizeof(uint8_t);
|
|
||||||
size_t size = 1024;
|
|
||||||
|
|
||||||
pid_t CHILD;
|
|
||||||
CHILD = fork();
|
|
||||||
if (CHILD == -1) {
|
|
||||||
perror("fork failed!");
|
|
||||||
exit(EXIT_FAILURE);
|
|
||||||
}
|
|
||||||
|
|
||||||
// Parent Process
|
|
||||||
if(CHILD != 0){
|
|
||||||
|
|
||||||
char buffer[1024] = {'p', 'a', 'c', 'k', 'e', 't', '\0'};
|
|
||||||
buffer[7] = '\0';
|
|
||||||
|
|
||||||
// Write data to the shared memory
|
|
||||||
for(int i = 1; i < 5; i++){
|
|
||||||
// printf("parent writing to shm\n");
|
|
||||||
buffer[6] = '0' + i;
|
|
||||||
memcpy(ptr, buffer, 1024); // Copy 1024 bytes to shared memory
|
|
||||||
|
|
||||||
// Optional: Print what is being written to shared memory for verification
|
|
||||||
printf("P - Writing to shared memory: %s\n", (char *)ptr);
|
|
||||||
sem_post(sem_parent_child);
|
|
||||||
sem_wait(sem_child_grandchild);
|
|
||||||
}
|
|
||||||
|
|
||||||
// Unmap the shared memory object
|
|
||||||
if (munmap(ptr, size) == -1) {
|
|
||||||
perror("munmap");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Close the shared memory file descriptor
|
|
||||||
if (close(shm_fd) == -1) {
|
|
||||||
perror("close");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
sem_close(sem_parent_child);
|
|
||||||
sem_close(sem_child_grandchild);
|
|
||||||
wait(NULL); /* Wait for child */
|
|
||||||
}
|
|
||||||
|
|
||||||
// Child process
|
|
||||||
else if (CHILD == 0) { /* Child reads from pipe */
|
|
||||||
pid_t GRAND_CHILD = fork();
|
|
||||||
|
|
||||||
if (GRAND_CHILD == -1) {
|
|
||||||
perror("fork failed!");
|
|
||||||
exit(EXIT_FAILURE);
|
|
||||||
}
|
|
||||||
|
|
||||||
// Child Process
|
|
||||||
if(GRAND_CHILD != 0){
|
|
||||||
int shm_fd = shm_open(shm1_name, O_CREAT | O_RDWR, 0666);
|
|
||||||
if (shm_fd == -1) {
|
|
||||||
perror("shm_open");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Resize the shared memory object to the desired size
|
|
||||||
if (ftruncate(shm_fd, size) == -1) {
|
|
||||||
perror("ftruncate");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Map the shared memory object into the process address space
|
|
||||||
void *ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, shm_fd, 0);
|
|
||||||
if (ptr == MAP_FAILED) {
|
|
||||||
perror("mmap");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
int shm2_fd = shm_open(shm2_name, O_CREAT | O_RDWR, 0666);
|
|
||||||
if (shm2_fd == -1) {
|
|
||||||
perror("shm_open");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Resize the shared memory object to the desired size
|
|
||||||
if (ftruncate(shm2_fd, size) == -1) {
|
|
||||||
perror("ftruncate");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Map the shared memory object into the process address space
|
|
||||||
void *ptr2 = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, shm2_fd, 0);
|
|
||||||
if (ptr2 == MAP_FAILED) {
|
|
||||||
perror("mmap");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
for(int i=0; i<5; i++){
|
|
||||||
// printf("Child reading from shm1 and writing to shm2...\n");
|
|
||||||
sem_wait(sem_parent_child);
|
|
||||||
// Print the contents of the shared memory
|
|
||||||
char *packet = (char *)ptr;
|
|
||||||
printf("C - Shared memory contents: %s\n", packet);
|
|
||||||
// char buffer[1024];
|
|
||||||
// strncpy(buffer, (char *)ptr, 1024);
|
|
||||||
memcpy(ptr2, ptr, 1024);
|
|
||||||
sem_post(sem_child_grandchild); // Signal parent
|
|
||||||
}
|
|
||||||
|
|
||||||
// Unmap the shared memory object
|
|
||||||
if (munmap(ptr, size) == -1) {
|
|
||||||
perror("munmap");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Close the shared memory file descriptor
|
|
||||||
if (close(shm_fd) == -1) {
|
|
||||||
perror("close");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
// printf("child writing to shm\n");
|
|
||||||
|
|
||||||
// Unmap the shared memory object
|
|
||||||
if (munmap(ptr2, size) == -1) {
|
|
||||||
perror("munmap");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Close the shared memory file descriptor
|
|
||||||
if (close(shm2_fd) == -1) {
|
|
||||||
perror("close");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
shm_unlink(shm1_name);
|
|
||||||
sem_close(sem_parent_child);
|
|
||||||
sem_close(sem_child_grandchild);
|
|
||||||
wait(NULL);
|
|
||||||
exit(EXIT_SUCCESS);
|
|
||||||
}
|
|
||||||
|
|
||||||
// GrandChild Process
|
|
||||||
else if (GRAND_CHILD == 0) { /* GrandChild reads from pipe */
|
|
||||||
int shm2_fd = shm_open(shm2_name, O_CREAT | O_RDWR, 0666);
|
|
||||||
if (shm2_fd == -1) {
|
|
||||||
perror("shm_open");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Resize the shared memory object to the desired size
|
|
||||||
if (ftruncate(shm2_fd, size) == -1) {
|
|
||||||
perror("ftruncate");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Map the shared memory object into the process address space
|
|
||||||
void *ptr2 = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, shm2_fd, 0);
|
|
||||||
if (ptr2 == MAP_FAILED) {
|
|
||||||
perror("mmap");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
for(int i=0; i<5; i++){
|
|
||||||
sem_wait(sem_child_grandchild);
|
|
||||||
// Print the contents of the shared memory
|
|
||||||
// printf("Grandchild reading from shm...\n");
|
|
||||||
printf("GC - Shared memory contents: %s\n", (char *)ptr2);
|
|
||||||
}
|
|
||||||
|
|
||||||
// Unmap the shared memory object
|
|
||||||
if (munmap(ptr2, size) == -1) {
|
|
||||||
perror("munmap");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Close the shared memory file descriptor
|
|
||||||
if (close(shm2_fd) == -1) {
|
|
||||||
perror("close");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
shm_unlink(shm2_name);
|
|
||||||
sem_close(sem_parent_child);
|
|
||||||
sem_close(sem_child_grandchild);
|
|
||||||
exit(EXIT_SUCCESS);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
sem_close(sem_parent_child);
|
|
||||||
sem_close(sem_child_grandchild);
|
|
||||||
sem_unlink(sem1_name);
|
|
||||||
sem_unlink(sem2_name);
|
|
||||||
|
|
||||||
cout << "success" << endl;
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
@ -1,53 +0,0 @@
|
||||||
#include<stdio.h>
|
|
||||||
#include<sys/mman.h>
|
|
||||||
#include<sys/stat.h>
|
|
||||||
#include<fcntl.h>
|
|
||||||
#include<unistd.h>
|
|
||||||
|
|
||||||
int main() {
|
|
||||||
const char *name = "/my_shared_memory";
|
|
||||||
int shm_fd = shm_open(name, O_CREAT | O_RDWR, 0666);
|
|
||||||
if (shm_fd == -1) {
|
|
||||||
perror("shm_open");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Set the size of the shared memory region
|
|
||||||
size_t size = 1024;
|
|
||||||
|
|
||||||
// Resize the shared memory object to the desired size
|
|
||||||
if (ftruncate(shm_fd, size) == -1) {
|
|
||||||
perror("ftruncate");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Map the shared memory object into the process address space
|
|
||||||
void *ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, shm_fd, 0);
|
|
||||||
if (ptr == MAP_FAILED) {
|
|
||||||
perror("mmap");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Write data to the shared memory
|
|
||||||
sprintf((char *)ptr, "Hello, shared memory!");
|
|
||||||
|
|
||||||
// Unmap the shared memory object
|
|
||||||
if (munmap(ptr, size) == -1) {
|
|
||||||
perror("munmap");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Close the shared memory file descriptor
|
|
||||||
if (close(shm_fd) == -1) {
|
|
||||||
perror("close");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Unlink the shared memory object
|
|
||||||
if (shm_unlink(name) == -1) {
|
|
||||||
perror("shm_unlink");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
@ -1,50 +0,0 @@
|
||||||
/* reader */
|
|
||||||
#include<stdio.h>
|
|
||||||
#include<sys/mman.h>
|
|
||||||
#include<sys/stat.h>
|
|
||||||
#include<fcntl.h>
|
|
||||||
#include<unistd.h>
|
|
||||||
|
|
||||||
int main() {
|
|
||||||
const char *name = "/my_shared_memory";
|
|
||||||
int shm_fd = shm_open(name, O_CREAT | O_RDWR, 0666);
|
|
||||||
if (shm_fd == -1) {
|
|
||||||
perror("shm_open");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Set the size of the shared memory region
|
|
||||||
size_t size = 1024;
|
|
||||||
|
|
||||||
// Resize the shared memory object to the desired size
|
|
||||||
if (ftruncate(shm_fd, size) == -1) {
|
|
||||||
perror("ftruncate");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Map the shared memory object into the process address space
|
|
||||||
void *ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, shm_fd, 0);
|
|
||||||
if (ptr == MAP_FAILED) {
|
|
||||||
perror("mmap");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
sleep(2);
|
|
||||||
|
|
||||||
// Print the contents of the shared memory
|
|
||||||
printf("Shared memory contents: %s\n", (char *)ptr);
|
|
||||||
|
|
||||||
// Unmap the shared memory object
|
|
||||||
if (munmap(ptr, size) == -1) {
|
|
||||||
perror("munmap");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Close the shared memory file descriptor
|
|
||||||
if (close(shm_fd) == -1) {
|
|
||||||
perror("close");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
@ -0,0 +1,283 @@
|
||||||
|
#include <iostream>
|
||||||
|
#include "important.h"
|
||||||
|
#include <cstdint>
|
||||||
|
#include <chrono>
|
||||||
|
#include <fstream>
|
||||||
|
|
||||||
|
using namespace std;
|
||||||
|
|
||||||
|
struct image_t *S1_smoothen(struct image_t *input_image)
|
||||||
|
{
|
||||||
|
// cout << input_image->width << input_image->height << " " << input_image->image_pixels << endl;
|
||||||
|
int width = input_image->width;
|
||||||
|
int height = input_image->height;
|
||||||
|
|
||||||
|
// memory allocation
|
||||||
|
struct image_t *smoother = new struct image_t;
|
||||||
|
smoother->height = height;
|
||||||
|
smoother->width = width;
|
||||||
|
smoother->image_pixels = new uint8_t **[height];
|
||||||
|
for (int i = 0; i < height; i++)
|
||||||
|
{
|
||||||
|
smoother->image_pixels[i] = new uint8_t *[width];
|
||||||
|
for (int j = 0; j < width; j++)
|
||||||
|
smoother->image_pixels[i][j] = new uint8_t[3];
|
||||||
|
}
|
||||||
|
|
||||||
|
for (int i = 1; i < height - 1; i++)
|
||||||
|
{
|
||||||
|
for (int j = 1; j < width - 1; j++)
|
||||||
|
{
|
||||||
|
for (int k = 0; k < 3; k++)
|
||||||
|
{
|
||||||
|
// image->image_pixels[i][j][k] = val;
|
||||||
|
// edge cases
|
||||||
|
if (i == 0 && j == 0)
|
||||||
|
{ // i-1 and j - 1 doesnt exist
|
||||||
|
smoother->image_pixels[i][j][k] = (input_image->image_pixels[i][j][k] / 4 + input_image->image_pixels[i][j + 1][k] / 4 + input_image->image_pixels[i + 1][j][k] / 4 + input_image->image_pixels[i + 1][j + 1][k] / 4);
|
||||||
|
}
|
||||||
|
else if (i == height - 1 && j == 0)
|
||||||
|
{ // i+1 and j-1 does not exist
|
||||||
|
smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j][k] / 4 + input_image->image_pixels[i - 1][j + 1][k] / 4 + input_image->image_pixels[i][j][k] / 4 + input_image->image_pixels[i][j + 1][k] / 4);
|
||||||
|
}
|
||||||
|
|
||||||
|
else if (i == 0 && j == width - 1)
|
||||||
|
{ // i-1 and j+1 does not exist
|
||||||
|
smoother->image_pixels[i][j][k] = (input_image->image_pixels[i][j - 1][k] / 4 + input_image->image_pixels[i][j][k] / 4 + input_image->image_pixels[i + 1][j - 1][k] / 4 + input_image->image_pixels[i + 1][j][k] / 4);
|
||||||
|
}
|
||||||
|
else if (i == height - 1 && j == width - 1)
|
||||||
|
{ // i+1 and j+1 does not exist
|
||||||
|
smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j - 1][k] / 4 + input_image->image_pixels[i - 1][j][k] / 4 + input_image->image_pixels[i][j - 1][k] / 4 + input_image->image_pixels[i][j][k] / 4);
|
||||||
|
}
|
||||||
|
else if (i == 0)
|
||||||
|
{ // i - 1 does not exist
|
||||||
|
smoother->image_pixels[i][j][k] = (input_image->image_pixels[i][j - 1][k] / 6 + input_image->image_pixels[i][j][k] / 6 + input_image->image_pixels[i][j + 1][k] / 6 + input_image->image_pixels[i + 1][j - 1][k] / 6 + input_image->image_pixels[i + 1][j][k] / 6 + input_image->image_pixels[i + 1][j + 1][k] / 6);
|
||||||
|
}
|
||||||
|
|
||||||
|
else if (j == 0)
|
||||||
|
{ // j -1 does not exist
|
||||||
|
smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j][k] / 6 + input_image->image_pixels[i - 1][j + 1][k] / 6 + input_image->image_pixels[i][j][k] / 6 + input_image->image_pixels[i][j + 1][k] / 6 + input_image->image_pixels[i + 1][j][k] / 6 + input_image->image_pixels[i + 1][j + 1][k] / 6);
|
||||||
|
}
|
||||||
|
|
||||||
|
else if (i == height - 1)
|
||||||
|
{ // i+1 does not exist
|
||||||
|
smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j - 1][k] / 6 + input_image->image_pixels[i - 1][j][k] / 6 + input_image->image_pixels[i - 1][j + 1][k] / 6 + input_image->image_pixels[i][j - 1][k] / 6 + input_image->image_pixels[i][j][k] / 6 + input_image->image_pixels[i][j + 1][k] / 6);
|
||||||
|
}
|
||||||
|
else if (j == width - 1)
|
||||||
|
{ // j + 1 does not exist
|
||||||
|
smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j - 1][k] / 6 + input_image->image_pixels[i - 1][j][k] / 6 + input_image->image_pixels[i][j - 1][k] / 6 + input_image->image_pixels[i][j][k] / 6 + input_image->image_pixels[i + 1][j - 1][k] / 6 + input_image->image_pixels[i + 1][j][k] / 6);
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j - 1][k] / 9 + input_image->image_pixels[i - 1][j][k] / 9 + input_image->image_pixels[i - 1][j + 1][k] / 9 + input_image->image_pixels[i][j - 1][k] / 9 + input_image->image_pixels[i][j][k] / 9 + input_image->image_pixels[i][j + 1][k] / 9 + input_image->image_pixels[i + 1][j - 1][k] / 9 + input_image->image_pixels[i + 1][j][k] / 9 + input_image->image_pixels[i + 1][j + 1][k] / 9);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return smoother;
|
||||||
|
}
|
||||||
|
|
||||||
|
struct image_t *S2_find_details(struct image_t *input_image, struct image_t *smoothened_image)
|
||||||
|
{
|
||||||
|
// TODO
|
||||||
|
int width = input_image->width;
|
||||||
|
int height = input_image->height;
|
||||||
|
|
||||||
|
struct image_t *details = new struct image_t;
|
||||||
|
details->height = height;
|
||||||
|
details->width = width;
|
||||||
|
details->image_pixels = new uint8_t **[height];
|
||||||
|
|
||||||
|
for (int i = 0; i < height; i++)
|
||||||
|
{
|
||||||
|
details->image_pixels[i] = new uint8_t *[width];
|
||||||
|
for (int j = 0; j < width; j++)
|
||||||
|
details->image_pixels[i][j] = new uint8_t[3];
|
||||||
|
}
|
||||||
|
|
||||||
|
for (int i = 1; i < height - 1; i++)
|
||||||
|
{
|
||||||
|
for (int j = 1; j < width - 1; j++)
|
||||||
|
{
|
||||||
|
for (int k = 0; k < 3; k++)
|
||||||
|
{
|
||||||
|
details->image_pixels[i][j][k] = max(0, input_image->image_pixels[i][j][k] - smoothened_image->image_pixels[i][j][k]);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return details;
|
||||||
|
}
|
||||||
|
|
||||||
|
struct image_t *S3_sharpen(struct image_t *input_image, struct image_t *details_image)
|
||||||
|
{
|
||||||
|
// TODO
|
||||||
|
int width = input_image->width;
|
||||||
|
int height = input_image->height;
|
||||||
|
|
||||||
|
int a = 1;
|
||||||
|
|
||||||
|
struct image_t *sharp = new struct image_t;
|
||||||
|
sharp->height = height;
|
||||||
|
sharp->width = width;
|
||||||
|
sharp->image_pixels = new uint8_t **[height];
|
||||||
|
|
||||||
|
for (int i = 0; i < height; i++)
|
||||||
|
{
|
||||||
|
sharp->image_pixels[i] = new uint8_t *[width];
|
||||||
|
for (int j = 0; j < width; j++)
|
||||||
|
sharp->image_pixels[i][j] = new uint8_t[3];
|
||||||
|
}
|
||||||
|
|
||||||
|
for (int i = 1; i < height - 1; i++)
|
||||||
|
{
|
||||||
|
for (int j = 1; j < width - 1; j++)
|
||||||
|
{
|
||||||
|
for (int k = 0; k < 3; k++)
|
||||||
|
{
|
||||||
|
sharp->image_pixels[i][j][k] = min(255, input_image->image_pixels[i][j][k] + details_image->image_pixels[i][j][k]) * a;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return sharp; // TODO remove this line when adding your code
|
||||||
|
}
|
||||||
|
|
||||||
|
uint8_t skip_blanks_comments_while_reading(ifstream *read_stream) // returns the byte at the first position after the skipping of the blank space
|
||||||
|
{
|
||||||
|
uint8_t val;
|
||||||
|
while (true)
|
||||||
|
{
|
||||||
|
val = read_stream->get();
|
||||||
|
if (val == '#')
|
||||||
|
{
|
||||||
|
while (val != '\n')
|
||||||
|
{
|
||||||
|
val = read_stream->get();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (val == '\n' || val == ' ' || val == '\t')
|
||||||
|
{
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
else if (val != '#')
|
||||||
|
return val;
|
||||||
|
}
|
||||||
|
return val;
|
||||||
|
}
|
||||||
|
|
||||||
|
struct image_t *read_ppm_file(char *path_to_input_file)
|
||||||
|
{
|
||||||
|
// cout << "input image file = " << path_to_input_file << "\n";
|
||||||
|
|
||||||
|
ifstream read_stream(path_to_input_file, ios::binary | ios::in);
|
||||||
|
|
||||||
|
if (read_stream.is_open())
|
||||||
|
{
|
||||||
|
struct image_t *image = new struct image_t;
|
||||||
|
|
||||||
|
uint8_t val = skip_blanks_comments_while_reading(&read_stream); // 'P'
|
||||||
|
val = read_stream.get(); //'6'
|
||||||
|
|
||||||
|
// width
|
||||||
|
val = skip_blanks_comments_while_reading(&read_stream);
|
||||||
|
while (true)
|
||||||
|
{
|
||||||
|
if (val == ' ' || val == '\t' || val == '\n')
|
||||||
|
break;
|
||||||
|
image->width = image->width * 10 + (val - '0');
|
||||||
|
val = read_stream.get();
|
||||||
|
}
|
||||||
|
// cout << "width = " << image->width << "\n";
|
||||||
|
|
||||||
|
// height
|
||||||
|
val = skip_blanks_comments_while_reading(&read_stream);
|
||||||
|
while (true)
|
||||||
|
{
|
||||||
|
if (val == ' ' || val == '\t' || val == '\n')
|
||||||
|
break;
|
||||||
|
image->height = image->height * 10 + (val - '0');
|
||||||
|
val = read_stream.get();
|
||||||
|
}
|
||||||
|
// cout << "height = " << image->height << "\n";
|
||||||
|
|
||||||
|
image->image_pixels = new uint8_t **[image->height];
|
||||||
|
for (int i = 0; i < image->height; i++)
|
||||||
|
{
|
||||||
|
image->image_pixels[i] = new uint8_t *[image->width];
|
||||||
|
for (int j = 0; j < image->width; j++)
|
||||||
|
image->image_pixels[i][j] = new uint8_t[3];
|
||||||
|
}
|
||||||
|
|
||||||
|
// maxval
|
||||||
|
val = skip_blanks_comments_while_reading(&read_stream);
|
||||||
|
while (true)
|
||||||
|
{
|
||||||
|
if (val == ' ' || val == '\t' || val == '\n')
|
||||||
|
break;
|
||||||
|
val = read_stream.get();
|
||||||
|
}
|
||||||
|
|
||||||
|
// get pixel values
|
||||||
|
val = skip_blanks_comments_while_reading(&read_stream);
|
||||||
|
for (int i = 0; i < image->height; i++)
|
||||||
|
{
|
||||||
|
for (int j = 0; j < image->width; j++)
|
||||||
|
{
|
||||||
|
for (int k = 0; k < 3; k++)
|
||||||
|
{
|
||||||
|
image->image_pixels[i][j][k] = val;
|
||||||
|
val = read_stream.get(); // assuming maxval of <=255
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
// read_stream.seekg(-1, ios_base::cur);
|
||||||
|
// read_stream.read(((char*)image->image_pixels), image->height * image->width * 3); //assuming maxval of <=255
|
||||||
|
|
||||||
|
read_stream.close();
|
||||||
|
|
||||||
|
return image;
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
cerr << "failed to open file " << path_to_input_file << "\n\n";
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void write_ppm_file(char *path_to_output_file, struct image_t *image)
|
||||||
|
{
|
||||||
|
// cout << "output image file = " << path_to_output_file << "\n";
|
||||||
|
|
||||||
|
ofstream write_stream(path_to_output_file, ios::binary | ios::out);
|
||||||
|
|
||||||
|
if (write_stream.is_open())
|
||||||
|
{
|
||||||
|
write_stream.write("P6\n", 3);
|
||||||
|
std::string width_string = std::to_string(image->width);
|
||||||
|
// cout << "width = " << width_string << "\n";
|
||||||
|
write_stream.write(width_string.c_str(), width_string.length());
|
||||||
|
write_stream.write(" ", 1);
|
||||||
|
std::string height_string = std::to_string(image->height);
|
||||||
|
// cout << "height = " << height_string << "\n";
|
||||||
|
write_stream.write(height_string.c_str(), height_string.length());
|
||||||
|
write_stream.write("\n255\n", 5);
|
||||||
|
for (int i = 0; i < image->height; i++)
|
||||||
|
{
|
||||||
|
for (int j = 0; j < image->width; j++)
|
||||||
|
{
|
||||||
|
for (int k = 0; k < 3; k++)
|
||||||
|
{
|
||||||
|
write_stream.put(image->image_pixels[i][j][k]); // assuming maxval of <=255
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
// write_stream.write(((char*)image->image_pixels), image->height * image->width * 3);
|
||||||
|
write_stream.close();
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
cerr << "failed to open file " << path_to_output_file << "\n\n";
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
@ -0,0 +1,19 @@
|
||||||
|
#ifndef IMPORTANT_H
|
||||||
|
#define IMPORTANT_H
|
||||||
|
#include <cstdint>
|
||||||
|
|
||||||
|
struct image_t
|
||||||
|
{
|
||||||
|
int width;
|
||||||
|
int height;
|
||||||
|
uint8_t*** image_pixels;
|
||||||
|
};
|
||||||
|
|
||||||
|
struct image_t* S1_smoothen(struct image_t *input_image);
|
||||||
|
struct image_t* S2_find_details(struct image_t *input_image, struct image_t *smoothened_image);
|
||||||
|
struct image_t* S3_sharpen(struct image_t *input_image, struct image_t *details_image);
|
||||||
|
|
||||||
|
struct image_t* read_ppm_file(char* path_to_input_file);
|
||||||
|
void write_ppm_file(char* path_to_output_file, struct image_t* image);
|
||||||
|
|
||||||
|
#endif
|
||||||
Loading…
Reference in New Issue