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// Copyright (c) Team CharLS.
// SPDX-License-Identifier: BSD-3-Clause
#include "bitstreamdamage.h"
#include "util.h"
#include <iostream>
#include <random>
#include <vector>
using charls::jpegls_decoder;
using charls::jpegls_errc;
using charls::jpegls_error;
using std::cout;
using std::error_code;
using std::mt19937;
using std::uniform_int_distribution;
using std::vector;
namespace {
void test_damaged_bit_stream1()
{
const vector<uint8_t> encoded_buffer{read_file("test/incorrect_images/InfiniteLoopFFMPEG.jls")};
vector<uint8_t> destination(size_t{256} * 256 * 2);
error_code error;
try
{
jpegls_decoder::decode(encoded_buffer, destination);
}
catch (const jpegls_error& e)
{
error = e.code();
}
assert::is_true(error == jpegls_errc::invalid_encoded_data);
}
void test_damaged_bit_stream2()
{
vector<uint8_t> encoded_buffer{read_file("test/tulips-gray-8bit-512-512-hp-encoder.jls")};
encoded_buffer.resize(900);
encoded_buffer.resize(40000, 3);
vector<uint8_t> destination(size_t{512} * 512);
error_code error;
try
{
jpegls_decoder::decode(encoded_buffer, destination);
}
catch (const jpegls_error& e)
{
error = e.code();
}
assert::is_true(error == jpegls_errc::invalid_encoded_data);
}
void test_damaged_bit_stream3()
{
vector<uint8_t> encoded_buffer{read_file("test/tulips-gray-8bit-512-512-hp-encoder.jls")};
encoded_buffer[300] = 0xFF;
encoded_buffer[301] = 0xFF;
vector<uint8_t> destination(size_t{512} * 512);
error_code error;
try
{
jpegls_decoder::decode(encoded_buffer, destination);
}
catch (const jpegls_error& e)
{
error = e.code();
}
assert::is_true(error == jpegls_errc::invalid_encoded_data);
}
void test_file_with_random_header_damage(const char* filename)
{
const vector<uint8_t> encoded_buffer_original{read_file(filename)};
mt19937 generator(102347325);
MSVC_WARNING_SUPPRESS_NEXT_LINE(26496) // cannot be marked as const as operator() is not always defined const.
uniform_int_distribution<uint32_t> distribution(0, 255);
vector<uint8_t> destination(size_t{512} * 512);
for (size_t i{}; i != 40; ++i)
{
vector<uint8_t> encoded_buffer(encoded_buffer_original);
vector<int> errors(10, 0);
for (int j{}; j != 20; ++j)
{
encoded_buffer[i] = static_cast<uint8_t>(distribution(generator));
encoded_buffer[i + 1] = static_cast<uint8_t>(distribution(generator));
encoded_buffer[i + 2] = static_cast<uint8_t>(distribution(generator));
encoded_buffer[i + 3] = static_cast<uint8_t>(distribution(generator));
error_code error;
try
{
jpegls_decoder::decode(encoded_buffer, destination);
}
catch (const jpegls_error& e)
{
error = e.code();
}
errors[static_cast<size_t>(error.value())]++;
}
cout << "With garbage input at index " << i << ": ";
for (size_t error{}; error != errors.size(); ++error)
{
if (errors[error] == 0)
continue;
cout << errors[error] << "x error (" << error << "); ";
}
cout << "\r\n";
}
}
void test_random_malformed_header()
{
test_file_with_random_header_damage("test/conformance/t8c0e0.jls");
test_file_with_random_header_damage("test/conformance/t8c1e0.jls");
test_file_with_random_header_damage("test/conformance/t8c2e0.jls");
}
} // namespace
void damaged_bit_stream_tests()
{
cout << "Test Damaged bit stream\r\n";
test_damaged_bit_stream1();
test_damaged_bit_stream2();
test_damaged_bit_stream3();
cout << "Begin random malformed bit stream tests:\n";
test_random_malformed_header();
cout << "End random malformed bit stream tests:\n";
}
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