obs-StreamFX/source/filters/filter-displacement.cpp
2019-10-13 07:27:42 +02:00

323 lines
11 KiB
C++

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