obs-StreamFX/source/filter-displacement.cpp

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/*
* 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 <sys/stat.h>
#include "strings.hpp"
// Initializer & Finalizer
static filter::displacement_factory* filterDisplacementInstance;
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INITIALIZER(FilterDisplacementInit)
{
initializerFunctions.push_back([] { filterDisplacementInstance = new filter::displacement_factory(); });
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finalizerFunctions.push_back([] { delete filterDisplacementInstance; });
}
filter::displacement_factory::displacement_factory()
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{
memset(&sourceInfo, 0, sizeof(obs_source_info));
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sourceInfo.id = "obs-stream-effects-filter-displacement";
sourceInfo.type = OBS_SOURCE_TYPE_FILTER;
sourceInfo.output_flags = OBS_SOURCE_VIDEO;
sourceInfo.get_name = get_name;
sourceInfo.get_defaults = get_defaults;
sourceInfo.get_properties = get_properties;
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sourceInfo.create = create;
sourceInfo.destroy = destroy;
sourceInfo.update = update;
sourceInfo.activate = activate;
sourceInfo.deactivate = deactivate;
sourceInfo.show = show;
sourceInfo.hide = hide;
sourceInfo.video_tick = video_tick;
sourceInfo.video_render = video_render;
obs_register_source(&sourceInfo);
}
filter::displacement_factory::~displacement_factory() {}
const char* filter::displacement_factory::get_name(void*)
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{
return P_TRANSLATE(S_FILTER_DISPLACEMENT);
}
void* filter::displacement_factory::create(obs_data_t* data, obs_source_t* source)
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{
return new displacement(data, source);
}
void filter::displacement_factory::destroy(void* ptr)
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{
delete reinterpret_cast<displacement*>(ptr);
}
uint32_t filter::displacement_factory::get_width(void* ptr)
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{
return reinterpret_cast<displacement*>(ptr)->get_width();
}
uint32_t filter::displacement_factory::get_height(void* ptr)
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{
return reinterpret_cast<displacement*>(ptr)->get_height();
}
void filter::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");
obs_data_set_default_string(data, S_FILTER_DISPLACEMENT_FILE, disp);
obs_data_set_default_double(data, S_FILTER_DISPLACEMENT_RATIO, 0);
obs_data_set_default_double(data, S_FILTER_DISPLACEMENT_SCALE, 0);
bfree(disp);
}
obs_properties_t* filter::displacement_factory::get_properties(void* ptr)
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{
obs_properties_t* pr = obs_properties_create();
std::string path = "";
if (ptr)
path = reinterpret_cast<displacement*>(ptr)->get_file();
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obs_properties_add_path(pr, S_FILTER_DISPLACEMENT_FILE, P_TRANSLATE(S_FILTER_DISPLACEMENT_FILE),
obs_path_type::OBS_PATH_FILE, P_TRANSLATE(S_FILTER_DISPLACEMENT_FILE_TYPES), path.c_str());
obs_properties_add_float_slider(pr, S_FILTER_DISPLACEMENT_RATIO, P_TRANSLATE(S_FILTER_DISPLACEMENT_RATIO), 0, 1,
0.01);
obs_properties_add_float_slider(pr, S_FILTER_DISPLACEMENT_SCALE, P_TRANSLATE(S_FILTER_DISPLACEMENT_SCALE), -1000,
1000, 0.01);
return pr;
}
void filter::displacement_factory::update(void* ptr, obs_data_t* data)
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{
reinterpret_cast<displacement*>(ptr)->update(data);
}
void filter::displacement_factory::activate(void* ptr)
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{
reinterpret_cast<displacement*>(ptr)->activate();
}
void filter::displacement_factory::deactivate(void* ptr)
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{
reinterpret_cast<displacement*>(ptr)->deactivate();
}
void filter::displacement_factory::show(void* ptr)
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{
reinterpret_cast<displacement*>(ptr)->show();
}
void filter::displacement_factory::hide(void* ptr)
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{
reinterpret_cast<displacement*>(ptr)->hide();
}
void filter::displacement_factory::video_tick(void* ptr, float time)
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{
reinterpret_cast<displacement*>(ptr)->video_tick(time);
}
void filter::displacement_factory::video_render(void* ptr, gs_effect_t* effect)
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{
reinterpret_cast<displacement*>(ptr)->video_render(effect);
}
void filter::displacement::validate_file_texture(std::string file)
{
bool do_update = false;
// File name different
if (file != m_file_name) {
do_update = true;
m_file_name = file;
}
// Timestamp verification
struct stat stats;
if (os_stat(m_file_name.c_str(), &stats) != 0) {
do_update = do_update || (stats.st_ctime != m_file_create_time);
do_update = do_update || (stats.st_mtime != m_file_modified_time);
do_update = do_update || (stats.st_size != m_file_size);
m_file_create_time = stats.st_ctime;
m_file_modified_time = stats.st_mtime;
m_file_size = stats.st_size;
}
do_update = !m_file_texture || do_update;
if (do_update) {
m_file_texture = std::make_shared<gs::texture>(m_file_name);
}
}
filter::displacement::displacement(obs_data_t* data, obs_source_t* context)
: m_self(context), m_active(true), m_timer(0), m_effect(nullptr), m_distance(0), m_file_create_time(0),
m_file_modified_time(0), m_file_size(0)
{
char* effectFile = obs_module_file("effects/displace.effect");
try {
m_effect = std::make_shared<gs::effect>(effectFile);
} catch (...) {
P_LOG_ERROR("<Displacement Filter:%s> Failed to load displacement effect.", obs_source_get_name(m_self));
}
bfree(effectFile);
update(data);
}
filter::displacement::~displacement()
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{
m_effect.reset();
m_file_texture.reset();
}
void filter::displacement::update(obs_data_t* data)
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{
validate_file_texture(obs_data_get_string(data, S_FILTER_DISPLACEMENT_FILE));
m_distance = float_t(obs_data_get_double(data, S_FILTER_DISPLACEMENT_RATIO));
vec2_set(&m_displacement_scale, float_t(obs_data_get_double(data, S_FILTER_DISPLACEMENT_SCALE)),
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float_t(obs_data_get_double(data, S_FILTER_DISPLACEMENT_SCALE)));
}
uint32_t filter::displacement::get_width()
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{
return 0;
}
uint32_t filter::displacement::get_height()
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{
return 0;
}
void filter::displacement::activate() {}
void filter::displacement::deactivate() {}
void filter::displacement::show() {}
void filter::displacement::hide() {}
void filter::displacement::video_tick(float time)
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{
m_timer += time;
if (m_timer >= 1.0) {
m_timer -= 1.0;
validate_file_texture(m_file_name);
}
}
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float interp(float a, float b, float v)
{
return (a * (1.0f - v)) + (b * v);
}
void filter::displacement::video_render(gs_effect_t*)
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{
obs_source_t* parent = obs_filter_get_parent(m_self);
obs_source_t* target = obs_filter_get_target(m_self);
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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 || !m_file_texture) {
obs_source_skip_video_filter(m_self);
return;
}
if (!obs_source_process_filter_begin(m_self, GS_RGBA, OBS_ALLOW_DIRECT_RENDERING)) {
obs_source_skip_video_filter(m_self);
return;
}
if (m_effect->has_parameter("texelScale")) {
m_effect->get_parameter("texelScale")
.set_float2(interp((1.0f / baseW), 1.0f, m_distance), interp((1.0f / baseH), 1.0f, m_distance));
}
if (m_effect->has_parameter("displacementScale")) {
m_effect->get_parameter("displacementScale").set_float2(m_displacement_scale);
}
if (m_effect->has_parameter("displacementMap")) {
m_effect->get_parameter("displacementMap").set_texture(m_file_texture);
}
obs_source_process_filter_end(m_self, m_effect->get_object(), baseW, baseH);
}
std::string filter::displacement::get_file()
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{
return m_file_name;
}