Some encode/decode practice.

This commit is contained in:
James Grogan 2022-11-21 17:45:12 +00:00
parent 8a41337e2d
commit ff962a6b16
29 changed files with 727 additions and 305 deletions

View file

@ -1,14 +1,46 @@
#include <iostream>
#include "HuffmanEncoder.h"
#include "RunLengthEncoder.h"
void test_run_length_encoder()
{
std::string test_data = "BCAAAADDDCCACACAC";
RunLengthEncoder encoder;
auto encoded = encoder.encode(test_data);
std::cout << "Encoded: " << encoded << std::endl;
auto decoded = encoder.decode(encoded);
std::cout << "Decoded: " << decoded << std::endl;
}
void test_huffman_encoder()
{
//std::string testData = "BCAADDDCCACACAC";
//std::vector<unsigned char> stream(testData.begin(), testData.end());
std::unordered_map<unsigned char, unsigned> counts;
counts['A'] = 1;
counts['B'] = 1;
counts['C'] = 1;
counts['D'] = 2;
counts['E'] = 3;
counts['F'] = 5;
counts['G'] = 5;
counts['H'] = 12;
HuffmanEncoder encoder;
encoder.encode(counts);
}
int main()
{
std::string testData = "BCAADDDCCACACAC";
std::vector<unsigned char> stream(testData.begin(), testData.end());
HuffmanEncoder encoder;
encoder.encode(stream);
test_huffman_encoder();
//test_run_length_encoder();
return 0;
}

View file

@ -5,7 +5,7 @@
int main()
{
const auto path = "/home/jmsgrogan/code/MediaTool-build/bin/test.png";
const auto path = "/home/jmsgrogan/Downloads/test.png";
PngReader reader;
reader.setPath(path);

View file

@ -1,6 +1,7 @@
#include "Image.h"
#include "PngWriter.h"
#include "PngWriterImpl.h"
#include "ImagePrimitives.h"
#include <iostream>
@ -13,22 +14,13 @@ int main()
image->setNumChannels(numChannels);
std::vector<unsigned char> data(image->getBytesPerRow()*height, 0);
for(unsigned jdx=0;jdx<height;jdx++)
{
const auto heightOffset = jdx*image->getBytesPerRow();
for(unsigned idx=0;idx<width*numChannels;idx+=numChannels)
{
const auto index = heightOffset + idx;
data[index] = (idx%2 == 0) ? 255*jdx/(height+1) : 0;
data[index+1] = 0;
data[index+2] = 0;
}
}
ImagePrimitives::drawAlternatingStrips(data, width,height, numChannels, image->getBytesPerRow());
image->setData(data);
PngWriter writer;
writer.SetPath("test.png");
writer.Write(image);
writer.setPath("test.png");
writer.write(image);
return 0;
}