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#include "../include/AsyncImageLoader.hpp"
#include "../include/FileAnalyzer.hpp"
#include "../include/DownloadUtils.hpp"
#include "../include/Program.hpp"
#include "../include/ImageUtils.hpp"
#include "../include/Scale.hpp"
#include "../include/SfmlFixes.hpp"
#include "../external/hash-library/sha256.h"
#include <sys/stat.h>
#include <assert.h>
namespace QuickMedia {
bool create_thumbnail(const Path &thumbnail_path, const Path &thumbnail_path_resized, sf::Vector2i resize_target_size) {
// > is to only shrink image if smaller than the target size
std::string new_size = std::to_string(resize_target_size.x) + "x" + std::to_string(resize_target_size.y) + ">";
// We only want the first frame if its a gif
Path thumbnail_path_first_frame = thumbnail_path;
thumbnail_path_first_frame.append("[0]");
Path result_path_tmp = thumbnail_path_resized;
result_path_tmp.append(".tmp");
const char *args[] = { "convert", thumbnail_path_first_frame.data.c_str(), "-thumbnail", new_size.c_str(), result_path_tmp.data.c_str(), nullptr};
int convert_res = exec_program(args, nullptr, nullptr);
if(convert_res == 0 && rename(result_path_tmp.data.c_str(), thumbnail_path_resized.data.c_str()) == 0)
return true;
else
return false;
}
// Create thumbnail and load it. On failure load the original image
static void create_thumbnail(const Path &thumbnail_path, const Path &thumbnail_path_resized, ThumbnailData *thumbnail_data, sf::Vector2i resize_target_size) {
FileAnalyzer file_analyzer;
if(!file_analyzer.load_file(thumbnail_path.data.c_str(), false)) {
fprintf(stderr, "Failed to convert %s to a thumbnail, using the original image\n", thumbnail_path.data.c_str());
thumbnail_data->loading_state = LoadingState::FINISHED_LOADING;
return;
}
if(is_content_type_video(file_analyzer.get_content_type())) {
if(video_get_first_frame(thumbnail_path.data.c_str(), thumbnail_path_resized.data.c_str(), resize_target_size.x, resize_target_size.y))
load_image_from_file(*thumbnail_data->image, thumbnail_path_resized.data);
thumbnail_data->loading_state = LoadingState::FINISHED_LOADING;
return;
}
if(create_thumbnail(thumbnail_path, thumbnail_path_resized, resize_target_size)) {
load_image_from_file(*thumbnail_data->image, thumbnail_path_resized.data);
} else {
load_image_from_file(*thumbnail_data->image, thumbnail_path.data);
fprintf(stderr, "Failed to convert %s to a thumbnail, using the original image\n", thumbnail_path.data.c_str());
}
thumbnail_data->loading_state = LoadingState::FINISHED_LOADING;
}
AsyncImageLoader& AsyncImageLoader::get_instance() {
static AsyncImageLoader *instance = nullptr;
if(!instance)
instance = new AsyncImageLoader();
return *instance;
}
AsyncImageLoader::AsyncImageLoader() {
for(int i = 0; i < NUM_IMAGE_LOAD_THREADS; ++i) {
loading_image[i] = false;
}
load_image_thread = std::thread([this]() mutable {
std::optional<ThumbnailLoadData> thumbnail_load_data_opt;
while(true) {
thumbnail_load_data_opt = image_load_queue.pop_wait();
if(!thumbnail_load_data_opt)
break;
ThumbnailLoadData &thumbnail_load_data = thumbnail_load_data_opt.value();
thumbnail_load_data.thumbnail_data->image = std::make_unique<sf::Image>();
Path thumbnail_path_resized = thumbnail_load_data.thumbnail_path;
if(thumbnail_load_data.resize_target_size.x != 0 && thumbnail_load_data.resize_target_size.y != 0)
thumbnail_path_resized.append("_" + std::to_string(thumbnail_load_data.resize_target_size.x) + "x" + std::to_string(thumbnail_load_data.resize_target_size.y));
if(get_file_type(thumbnail_path_resized) == FileType::REGULAR) {
load_image_from_file(*thumbnail_load_data.thumbnail_data->image, thumbnail_path_resized.data);
thumbnail_load_data.thumbnail_data->loading_state = LoadingState::FINISHED_LOADING;
fprintf(stderr, "Loaded %s from thumbnail cache\n", thumbnail_path_resized.data.c_str());
continue;
}
Path thumbnail_original_path;
if(thumbnail_load_data.local)
thumbnail_original_path = thumbnail_load_data.path;
else
thumbnail_original_path = thumbnail_load_data.thumbnail_path;
if(thumbnail_load_data.resize_target_size.x != 0 && thumbnail_load_data.resize_target_size.y != 0)
create_thumbnail(thumbnail_original_path, thumbnail_path_resized, thumbnail_load_data.thumbnail_data.get(), thumbnail_load_data.resize_target_size);
else
load_image_from_file(*thumbnail_load_data.thumbnail_data->image, thumbnail_original_path.data);
thumbnail_load_data.thumbnail_data->loading_state = LoadingState::FINISHED_LOADING;
}
});
}
AsyncImageLoader::~AsyncImageLoader() {
image_load_queue.close();
if(load_image_thread.joinable()) {
program_kill_in_thread(load_image_thread.get_id());
load_image_thread.join();
}
for(size_t i = 0; i < NUM_IMAGE_LOAD_THREADS; ++i) {
if(download_image_thread[i].joinable()) {
program_kill_in_thread(download_image_thread[i].get_id());
download_image_thread[i].join();
}
}
}
void AsyncImageLoader::load_thumbnail(const std::string &url, bool local, sf::Vector2i resize_target_size, std::shared_ptr<ThumbnailData> thumbnail_data) {
if(thumbnail_data->loading_state != LoadingState::NOT_LOADED)
return;
if(url.empty()) {
thumbnail_data->image = std::make_unique<sf::Image>();
thumbnail_data->loading_state = LoadingState::FINISHED_LOADING;
return;
}
SHA256 sha256;
sha256.add(url.data(), url.size());
Path thumbnail_path = get_cache_dir().join("thumbnails").join(sha256.getHash());
if(local) {
struct stat file_stat;
if(stat(url.c_str(), &file_stat) != 0 || !S_ISREG(file_stat.st_mode)) {
thumbnail_data->image = std::make_unique<sf::Image>();
thumbnail_data->loading_state = LoadingState::FINISHED_LOADING;
return;
}
thumbnail_path.append("_" + std::to_string(file_stat.st_mtim.tv_sec));
thumbnail_data->loading_state = LoadingState::LOADING;
image_load_queue.push({ url, thumbnail_path, true, thumbnail_data, resize_target_size });
return;
}
if(get_file_type(thumbnail_path) == FileType::REGULAR) {
thumbnail_data->loading_state = LoadingState::LOADING;
image_load_queue.push({ url, thumbnail_path, false, thumbnail_data, resize_target_size });
return;
}
int free_index = get_free_load_index();
if(free_index == -1)
return;
loading_image[free_index] = true;
thumbnail_data->loading_state = LoadingState::LOADING;
if(download_image_thread[free_index].joinable())
download_image_thread[free_index].join();
// TODO: Keep the thread running and use conditional variable instead to sleep until a new image should be loaded. Same in ImageViewer.
download_image_thread[free_index] = std::thread([this, free_index, thumbnail_path, url, resize_target_size, thumbnail_data]() mutable {
thumbnail_data->image = std::make_unique<sf::Image>();
Path thumbnail_path_resized = thumbnail_path;
if(resize_target_size.x != 0 && resize_target_size.y != 0)
thumbnail_path_resized.append("_" + std::to_string(resize_target_size.x) + "x" + std::to_string(resize_target_size.y));
if(get_file_type(thumbnail_path_resized) == FileType::REGULAR) {
load_image_from_file(*thumbnail_data->image, thumbnail_path_resized.data);
thumbnail_data->loading_state = LoadingState::FINISHED_LOADING;
fprintf(stderr, "Loaded %s from thumbnail cache\n", thumbnail_path_resized.data.c_str());
return;
}
if(get_file_type(thumbnail_path.data) == FileType::FILE_NOT_FOUND && download_to_file(url, thumbnail_path.data, {}, true) != DownloadResult::OK) {
thumbnail_data->loading_state = LoadingState::FINISHED_LOADING;
loading_image[free_index] = false;
return;
}
if(resize_target_size.x != 0 && resize_target_size.y != 0)
create_thumbnail(thumbnail_path, thumbnail_path_resized, thumbnail_data.get(), resize_target_size);
else
load_image_from_file(*thumbnail_data->image, thumbnail_path.data);
thumbnail_data->loading_state = LoadingState::FINISHED_LOADING;
loading_image[free_index] = false;
return;
});
}
int AsyncImageLoader::get_free_load_index() const {
for(int i = 0; i < NUM_IMAGE_LOAD_THREADS; ++i) {
if(!loading_image[i])
return i;
}
return -1;
}
}
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