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.h"
#include "strings.h"
Filter::Displacement::Displacement() {
memset(&sourceInfo, 0, sizeof(obs_source_info));
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;
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::~Displacement() {
}
const char * Filter::Displacement::get_name(void *) {
return P_TRANSLATE(P_FILTER_DISPLACEMENT);
}
void * Filter::Displacement::create(obs_data_t *data, obs_source_t *source) {
return new Instance(data, source);
}
void Filter::Displacement::destroy(void *ptr) {
delete reinterpret_cast<Instance*>(ptr);
}
uint32_t Filter::Displacement::get_width(void *ptr) {
return reinterpret_cast<Instance*>(ptr)->get_width();
}
uint32_t Filter::Displacement::get_height(void *ptr) {
return reinterpret_cast<Instance*>(ptr)->get_height();
}
void Filter::Displacement::get_defaults(obs_data_t *data) {
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char* disp = obs_module_file("filter-displacement/neutral.png");
obs_data_set_default_string(data, P_FILTER_DISPLACEMENT_FILE, disp);
obs_data_set_default_double(data, P_FILTER_DISPLACEMENT_RATIO, 0);
obs_data_set_default_double(data, P_FILTER_DISPLACEMENT_SCALE, 0);
bfree(disp);
}
obs_properties_t * Filter::Displacement::get_properties(void *ptr) {
obs_properties_t *pr = obs_properties_create();
std::string path = "";
if (ptr)
path = reinterpret_cast<Instance*>(ptr)->get_file();
obs_properties_add_path(pr, P_FILTER_DISPLACEMENT_FILE, P_TRANSLATE(P_FILTER_DISPLACEMENT_FILE), obs_path_type::OBS_PATH_FILE, P_TRANSLATE(P_FILTER_DISPLACEMENT_FILE_TYPES), path.c_str());
obs_properties_add_float_slider(pr, P_FILTER_DISPLACEMENT_RATIO, P_TRANSLATE(P_FILTER_DISPLACEMENT_RATIO), 0, 1, 0.01);
obs_properties_add_float_slider(pr, P_FILTER_DISPLACEMENT_SCALE, P_TRANSLATE(P_FILTER_DISPLACEMENT_SCALE), -1000, 1000, 0.01);
return pr;
}
void Filter::Displacement::update(void *ptr, obs_data_t *data) {
reinterpret_cast<Instance*>(ptr)->update(data);
}
void Filter::Displacement::activate(void *ptr) {
reinterpret_cast<Instance*>(ptr)->activate();
}
void Filter::Displacement::deactivate(void *ptr) {
reinterpret_cast<Instance*>(ptr)->deactivate();
}
void Filter::Displacement::show(void *ptr) {
reinterpret_cast<Instance*>(ptr)->show();
}
void Filter::Displacement::hide(void *ptr) {
reinterpret_cast<Instance*>(ptr)->hide();
}
void Filter::Displacement::video_tick(void *ptr, float time) {
reinterpret_cast<Instance*>(ptr)->video_tick(time);
}
void Filter::Displacement::video_render(void *ptr, gs_effect_t *effect) {
reinterpret_cast<Instance*>(ptr)->video_render(effect);
}
Filter::Displacement::Instance::Instance(obs_data_t *data, obs_source_t *context) {
this->dispmap.texture = nullptr;
this->dispmap.createTime = 0;
this->dispmap.modifiedTime = 0;
this->dispmap.size = 0;
this->timer = 0;
this->context = context;
obs_enter_graphics();
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char* effectFile = obs_module_file("filter-displacement/displacement.effect");
char* errorMessage = nullptr;
this->customEffect = gs_effect_create_from_file(effectFile, &errorMessage);
bfree(effectFile);
if (errorMessage != nullptr) {
PLOG_ERROR("%s", errorMessage);
bfree(errorMessage);
}
obs_leave_graphics();
update(data);
}
Filter::Displacement::Instance::~Instance() {
obs_enter_graphics();
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gs_effect_destroy(customEffect);
gs_texture_destroy(dispmap.texture);
obs_leave_graphics();
}
void Filter::Displacement::Instance::update(obs_data_t *data) {
updateDisplacementMap(obs_data_get_string(data, P_FILTER_DISPLACEMENT_FILE));
distance = float_t(obs_data_get_double(data, P_FILTER_DISPLACEMENT_RATIO));
vec2_set(&displacementScale,
float_t(obs_data_get_double(data, P_FILTER_DISPLACEMENT_SCALE)),
float_t(obs_data_get_double(data, P_FILTER_DISPLACEMENT_SCALE)));
}
uint32_t Filter::Displacement::Instance::get_width() {
return 0;
}
uint32_t Filter::Displacement::Instance::get_height() {
return 0;
}
void Filter::Displacement::Instance::activate() {}
void Filter::Displacement::Instance::deactivate() {}
void Filter::Displacement::Instance::show() {}
void Filter::Displacement::Instance::hide() {}
void Filter::Displacement::Instance::video_tick(float time) {
timer += time;
if (timer >= 1.0) {
timer -= 1.0;
updateDisplacementMap(dispmap.file);
}
}
float interp(float a, float b, float v) {
return (a * (1.0f - v)) + (b * v);
}
void Filter::Displacement::Instance::video_render(gs_effect_t *) {
obs_source_t *parent = obs_filter_get_parent(context);
obs_source_t *target = obs_filter_get_target(context);
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.
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if (!target || !parent || !context || !dispmap.texture
|| !baseW || !baseH) {
obs_source_skip_video_filter(context);
return;
}
if (!obs_source_process_filter_begin(context, GS_RGBA, OBS_ALLOW_DIRECT_RENDERING))
return;
gs_eparam_t *param;
vec2 texelScale;
vec2_set(&texelScale,
interp((1.0f / baseW), 1.0f, distance),
interp((1.0f / baseH), 1.0f, distance));
param = gs_effect_get_param_by_name(customEffect, "texelScale");
if (param)
gs_effect_set_vec2(param, &texelScale);
else
PLOG_ERROR("Failed to set texel scale param.");
param = gs_effect_get_param_by_name(customEffect, "displacementScale");
if (param)
gs_effect_set_vec2(param, &displacementScale);
else
PLOG_ERROR("Failed to set displacement scale param.");
param = gs_effect_get_param_by_name(customEffect, "displacementMap");
if (param)
gs_effect_set_texture(param, dispmap.texture);
else
PLOG_ERROR("Failed to set texture param.");
obs_source_process_filter_end(context, customEffect, baseW, baseH);
}
std::string Filter::Displacement::Instance::get_file() {
return dispmap.file;
}
void Filter::Displacement::Instance::updateDisplacementMap(std::string file) {
bool shouldUpdateTexture = false;
// Different File
if (file != dispmap.file) {
dispmap.file = file;
shouldUpdateTexture = true;
} else { // Different Timestamps
struct stat stats;
if (os_stat(dispmap.file.c_str(), &stats) != 0) {
shouldUpdateTexture = shouldUpdateTexture ||
(dispmap.createTime != stats.st_ctime) ||
(dispmap.modifiedTime != stats.st_mtime);
dispmap.createTime = stats.st_ctime;
dispmap.modifiedTime = stats.st_mtime;
}
}
if (shouldUpdateTexture) {
obs_enter_graphics();
if (dispmap.texture) {
gs_texture_destroy(dispmap.texture);
dispmap.texture = nullptr;
}
if (os_file_exists(file.c_str()))
dispmap.texture = gs_texture_create_from_file(dispmap.file.c_str());
obs_leave_graphics();
}
}