298 lines
8.9 KiB
C++
298 lines
8.9 KiB
C++
/*
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* Modern effects for a modern Streamer
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* Copyright (C) 2017 Michael Fabian Dirks
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "filter-displacement.hpp"
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#include <sys/stat.h>
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#include "strings.hpp"
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#define ST "Filter.Displacement"
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#define ST_FILE "Filter.Displacement.File"
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#define ST_FILE_TYPES "Filter.Displacement.File.Types"
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#define ST_RATIO "Filter.Displacement.Ratio"
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#define ST_SCALE "Filter.Displacement.Scale"
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// Initializer & Finalizer
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P_INITIALIZER(FilterDisplacementInit)
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{
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initializer_functions.push_back([] { filter::displacement::displacement_factory::initialize(); });
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finalizer_functions.push_back([] { filter::displacement::displacement_factory::finalize(); });
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}
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static std::shared_ptr<filter::displacement::displacement_factory> factory_instance = nullptr;
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void filter::displacement::displacement_factory::initialize()
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{
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factory_instance = std::make_shared<filter::displacement::displacement_factory>();
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}
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void filter::displacement::displacement_factory::finalize()
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{
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factory_instance.reset();
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}
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std::shared_ptr<filter::displacement::displacement_factory> filter::displacement::displacement_factory::get()
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{
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return factory_instance;
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}
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filter::displacement::displacement_factory::displacement_factory()
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{
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memset(&_source_info, 0, sizeof(obs_source_info));
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_source_info.id = "obs-stream-effects-filter-displacement";
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_source_info.type = OBS_SOURCE_TYPE_FILTER;
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_source_info.output_flags = OBS_SOURCE_VIDEO;
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_source_info.get_name = get_name;
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_source_info.get_defaults = get_defaults;
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_source_info.get_properties = get_properties;
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_source_info.create = create;
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_source_info.destroy = destroy;
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_source_info.update = update;
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_source_info.activate = activate;
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_source_info.deactivate = deactivate;
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_source_info.show = show;
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_source_info.hide = hide;
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_source_info.video_tick = video_tick;
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_source_info.video_render = video_render;
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obs_register_source(&_source_info);
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}
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filter::displacement::displacement_factory::~displacement_factory() {}
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const char* filter::displacement::displacement_factory::get_name(void*)
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{
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return D_TRANSLATE(ST);
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}
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void* filter::displacement::displacement_factory::create(obs_data_t* data, obs_source_t* source)
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{
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return new displacement_instance(data, source);
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}
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void filter::displacement::displacement_factory::destroy(void* ptr)
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{
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delete reinterpret_cast<displacement_instance*>(ptr);
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}
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uint32_t filter::displacement::displacement_factory::get_width(void* ptr)
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{
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return reinterpret_cast<displacement_instance*>(ptr)->get_width();
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}
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uint32_t filter::displacement::displacement_factory::get_height(void* ptr)
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{
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return reinterpret_cast<displacement_instance*>(ptr)->get_height();
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}
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void filter::displacement::displacement_factory::get_defaults(obs_data_t* data)
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{
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char* disp = obs_module_file("filter-displacement/neutral.png");
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obs_data_set_default_string(data, ST_FILE, disp);
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obs_data_set_default_double(data, ST_RATIO, 0);
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obs_data_set_default_double(data, ST_SCALE, 0);
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bfree(disp);
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}
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obs_properties_t* filter::displacement::displacement_factory::get_properties(void* ptr)
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{
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obs_properties_t* pr = obs_properties_create();
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std::string path = "";
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if (ptr)
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path = reinterpret_cast<displacement_instance*>(ptr)->get_file();
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obs_properties_add_path(pr, ST_FILE, D_TRANSLATE(ST_FILE), obs_path_type::OBS_PATH_FILE, D_TRANSLATE(ST_FILE_TYPES),
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path.c_str());
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obs_properties_add_float_slider(pr, ST_RATIO, D_TRANSLATE(ST_RATIO), 0, 1, 0.01);
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obs_properties_add_float_slider(pr, ST_SCALE, D_TRANSLATE(ST_SCALE), -1000, 1000, 0.01);
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return pr;
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}
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void filter::displacement::displacement_factory::update(void* ptr, obs_data_t* data)
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{
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reinterpret_cast<displacement_instance*>(ptr)->update(data);
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}
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void filter::displacement::displacement_factory::activate(void* ptr)
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{
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reinterpret_cast<displacement_instance*>(ptr)->activate();
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}
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void filter::displacement::displacement_factory::deactivate(void* ptr)
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{
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reinterpret_cast<displacement_instance*>(ptr)->deactivate();
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}
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void filter::displacement::displacement_factory::show(void* ptr)
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{
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reinterpret_cast<displacement_instance*>(ptr)->show();
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}
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void filter::displacement::displacement_factory::hide(void* ptr)
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{
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reinterpret_cast<displacement_instance*>(ptr)->hide();
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}
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void filter::displacement::displacement_factory::video_tick(void* ptr, float time)
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{
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reinterpret_cast<displacement_instance*>(ptr)->video_tick(time);
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}
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void filter::displacement::displacement_factory::video_render(void* ptr, gs_effect_t* effect)
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{
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reinterpret_cast<displacement_instance*>(ptr)->video_render(effect);
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}
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void filter::displacement::displacement_instance::validate_file_texture(std::string file)
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{
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bool do_update = false;
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// Don't allow empty file names.
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if (file.length() == 0) {
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return;
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}
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// File name different
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if (file != _file_name) {
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do_update = true;
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_file_name = file;
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}
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// Timestamp verification
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struct stat stats;
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if (os_stat(_file_name.c_str(), &stats) != 0) {
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do_update = do_update || (stats.st_ctime != _file_create_time);
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do_update = do_update || (stats.st_mtime != _file_modified_time);
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do_update = do_update || (static_cast<size_t>(stats.st_size) != _file_size);
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_file_create_time = stats.st_ctime;
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_file_modified_time = stats.st_mtime;
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_file_size = static_cast<size_t>(stats.st_size);
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}
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do_update = !_file_texture || do_update;
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if (do_update) {
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try {
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_file_texture = std::make_shared<gs::texture>(_file_name);
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} catch (...) {
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}
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}
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}
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filter::displacement::displacement_instance::displacement_instance(obs_data_t* data, obs_source_t* context)
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: _self(context), _timer(0), _effect(nullptr), _distance(0), _file_create_time(0), _file_modified_time(0),
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_file_size(0)
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{
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char* effectFile = obs_module_file("effects/displace.effect");
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if (effectFile) {
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try {
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_effect = gs::effect::create(effectFile);
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} catch (...) {
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P_LOG_ERROR("<Displacement Filter:%s> Failed to load displacement effect.", obs_source_get_name(_self));
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}
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bfree(effectFile);
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}
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update(data);
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}
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filter::displacement::displacement_instance::~displacement_instance()
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{
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_effect.reset();
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_file_texture.reset();
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}
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void filter::displacement::displacement_instance::update(obs_data_t* data)
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{
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validate_file_texture(obs_data_get_string(data, ST_FILE));
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_distance = float_t(obs_data_get_double(data, ST_RATIO));
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vec2_set(&_displacement_scale, float_t(obs_data_get_double(data, ST_SCALE)),
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float_t(obs_data_get_double(data, ST_SCALE)));
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}
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uint32_t filter::displacement::displacement_instance::get_width()
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{
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return 0;
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}
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uint32_t filter::displacement::displacement_instance::get_height()
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{
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return 0;
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}
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void filter::displacement::displacement_instance::activate() {}
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void filter::displacement::displacement_instance::deactivate() {}
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void filter::displacement::displacement_instance::show() {}
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void filter::displacement::displacement_instance::hide() {}
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void filter::displacement::displacement_instance::video_tick(float time)
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{
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_timer += time;
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if (_timer >= 1.0f) {
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_timer -= 1.0f;
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validate_file_texture(_file_name);
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}
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}
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static float interp(float a, float b, float v)
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{
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return (a * (1.0f - v)) + (b * v);
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}
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void filter::displacement::displacement_instance::video_render(gs_effect_t*)
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{
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obs_source_t* parent = obs_filter_get_parent(_self);
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obs_source_t* target = obs_filter_get_target(_self);
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uint32_t baseW = obs_source_get_base_width(target), baseH = obs_source_get_base_height(target);
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// Skip rendering if our target, parent or context is not valid.
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if (!parent || !target || !baseW || !baseH || !_file_texture) {
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obs_source_skip_video_filter(_self);
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return;
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}
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if (!obs_source_process_filter_begin(_self, GS_RGBA, OBS_ALLOW_DIRECT_RENDERING)) {
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obs_source_skip_video_filter(_self);
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return;
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}
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if (_effect->has_parameter("texelScale")) {
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_effect->get_parameter("texelScale")
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->set_float2(interp((1.0f / baseW), 1.0f, _distance), interp((1.0f / baseH), 1.0f, _distance));
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}
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if (_effect->has_parameter("displacementScale")) {
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_effect->get_parameter("displacementScale")->set_float2(_displacement_scale);
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}
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if (_effect->has_parameter("displacementMap")) {
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_effect->get_parameter("displacementMap")->set_texture(_file_texture);
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}
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obs_source_process_filter_end(_self, _effect->get_object(), baseW, baseH);
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}
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std::string filter::displacement::displacement_instance::get_file()
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{
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return _file_name;
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}
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