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obs-streamFX/source/filters/filter-shader.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-shader.hpp"
#include <stdexcept>
#include "strings.hpp"
#include "utility.hpp"
#define ST "Filter.Shader"
#define ST_SCALE_LOCKED "Filter.Shader.Scale.Locked"
#define ST_SCALE_SCALE "Filter.Shader.Scale.Scale"
#define ST_SCALE_WIDTH "Filter.Shader.Scale.Width"
#define ST_SCALE_HEIGHT "Filter.Shader.Scale.Height"
static std::shared_ptr<filter::shader::shader_factory> factory_instance = nullptr;
void filter::shader::shader_factory::initialize()
{
factory_instance = std::make_shared<filter::shader::shader_factory>();
}
void filter::shader::shader_factory::finalize()
{
factory_instance.reset();
}
std::shared_ptr<filter::shader::shader_factory> filter::shader::shader_factory::get()
{
return factory_instance;
}
static void get_defaults(obs_data_t* data)
{
obs_data_set_default_string(data, S_SHADER_FILE, obs_module_file("shaders/filter/example.effect"));
obs_data_set_default_string(data, S_SHADER_TECHNIQUE, "Draw");
obs_data_set_default_bool(data, ST_SCALE_LOCKED, true);
obs_data_set_default_double(data, ST_SCALE_SCALE, 1.0);
obs_data_set_default_double(data, ST_SCALE_WIDTH, 1.0);
obs_data_set_default_double(data, ST_SCALE_HEIGHT, 1.0);
}
filter::shader::shader_factory::shader_factory()
{
memset(&_source_info, 0, sizeof(obs_source_info));
_source_info.id = "obs-stream-effects-filter-shader";
_source_info.type = OBS_SOURCE_TYPE_FILTER;
_source_info.output_flags = OBS_SOURCE_VIDEO;
_source_info.get_name = [](void*) { return D_TRANSLATE(ST); };
_source_info.get_defaults = get_defaults;
_source_info.create = [](obs_data_t* data, obs_source_t* self) {
try {
return static_cast<void*>(new filter::shader::shader_instance(data, self));
} catch (const std::exception& ex) {
P_LOG_ERROR("<filter-shader> Failed to create source, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<filter-shader> Failed to create source.");
}
return static_cast<void*>(nullptr);
};
_source_info.destroy = [](void* ptr) {
try {
delete reinterpret_cast<filter::shader::shader_instance*>(ptr);
} catch (const std::exception& ex) {
P_LOG_ERROR("<filter-shader> Failed to delete source, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<filter-shader> Failed to delete source.");
}
};
_source_info.get_properties = [](void* ptr) {
obs_properties_t* pr = obs_properties_create();
try {
if (ptr)
reinterpret_cast<filter::shader::shader_instance*>(ptr)->properties(pr);
} catch (const std::exception& ex) {
P_LOG_ERROR("<filter-shader> Failed to retrieve options, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<filter-shader> Failed to retrieve options.");
}
return pr;
};
_source_info.get_width = [](void* ptr) {
try {
if (ptr)
return reinterpret_cast<filter::shader::shader_instance*>(ptr)->width();
} catch (const std::exception& ex) {
P_LOG_ERROR("<filter-shader> Failed to retrieve width, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<filter-shader> Failed to retrieve width.");
}
return uint32_t(0);
};
_source_info.get_height = [](void* ptr) {
try {
if (ptr)
return reinterpret_cast<filter::shader::shader_instance*>(ptr)->height();
} catch (const std::exception& ex) {
P_LOG_ERROR("<filter-shader> Failed to retrieve height, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<filter-shader> Failed to retrieve height.");
}
return uint32_t(0);
};
_source_info.load = [](void* ptr, obs_data_t* data) {
try {
if (ptr)
reinterpret_cast<filter::shader::shader_instance*>(ptr)->load(data);
} catch (const std::exception& ex) {
P_LOG_ERROR("<filter-shader> Failed to load, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<filter-shader> Failed to load.");
}
};
_source_info.update = [](void* ptr, obs_data_t* data) {
try {
if (ptr)
reinterpret_cast<filter::shader::shader_instance*>(ptr)->update(data);
} catch (const std::exception& ex) {
P_LOG_ERROR("<filter-shader> Failed to update, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<filter-shader> Failed to update.");
}
};
_source_info.activate = [](void* ptr) {
try {
if (ptr)
reinterpret_cast<filter::shader::shader_instance*>(ptr)->activate();
} catch (const std::exception& ex) {
P_LOG_ERROR("<filter-shader> Failed to activate, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<filter-shader> Failed to activate.");
}
};
_source_info.deactivate = [](void* ptr) {
try {
if (ptr)
reinterpret_cast<filter::shader::shader_instance*>(ptr)->deactivate();
} catch (const std::exception& ex) {
P_LOG_ERROR("<filter-shader> Failed to deactivate, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<filter-shader> Failed to deactivate.");
}
};
_source_info.video_tick = [](void* ptr, float_t time) {
try {
if (ptr)
reinterpret_cast<filter::shader::shader_instance*>(ptr)->video_tick(time);
} catch (const std::exception& ex) {
P_LOG_ERROR("<filter-shader> Failed to tick, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<filter-shader> Failed to tick.");
}
};
_source_info.video_render = [](void* ptr, gs_effect_t* effect) {
try {
if (ptr)
reinterpret_cast<filter::shader::shader_instance*>(ptr)->video_render(effect);
} catch (const std::exception& ex) {
P_LOG_ERROR("<filter-shader> Failed to render, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<filter-shader> Failed to render.");
}
};
_source_info.enum_active_sources = [](void* ptr, obs_source_enum_proc_t enum_callback, void* param) {
try {
if (ptr)
reinterpret_cast<filter::shader::shader_instance*>(ptr)->enum_active_sources(enum_callback, param);
} catch (const std::exception& ex) {
P_LOG_ERROR("<filter-shader> Failed to enumerate sources, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<filter-shader> Failed to enumerate sources.");
}
};
obs_register_source(&_source_info);
}
filter::shader::shader_factory::~shader_factory() {}
filter::shader::shader_instance::shader_instance(obs_data_t* data, obs_source_t* self)
: _self(self), _active(true), _width(0), _height(0)
{
_fx = std::make_shared<gfx::effect_source::effect_source>(self);
_fx->set_valid_property_cb(std::bind(&filter::shader::shader_instance::valid_param, this, std::placeholders::_1));
_fx->set_override_cb(std::bind(&filter::shader::shader_instance::override_param, this, std::placeholders::_1));
_rt = std::make_shared<gs::rendertarget>(GS_RGBA, GS_ZS_NONE);
_rt2 = std::make_shared<gs::rendertarget>(GS_RGBA, GS_ZS_NONE);
update(data);
}
filter::shader::shader_instance::~shader_instance() {}
uint32_t filter::shader::shader_instance::width()
{
return _swidth;
}
uint32_t filter::shader::shader_instance::height()
{
return _sheight;
}
bool modifiedcb3(obs_properties_t* props, obs_property_t* property, obs_data_t* settings) noexcept try {
obs_property_set_visible(obs_properties_get(props, ST_SCALE_SCALE), obs_data_get_bool(settings, ST_SCALE_LOCKED));
obs_property_set_visible(obs_properties_get(props, ST_SCALE_WIDTH), !obs_data_get_bool(settings, ST_SCALE_LOCKED));
obs_property_set_visible(obs_properties_get(props, ST_SCALE_HEIGHT), !obs_data_get_bool(settings, ST_SCALE_LOCKED));
return true;
} 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__);
return false;
}
void filter::shader::shader_instance::properties(obs_properties_t* props)
{
auto p = obs_properties_add_bool(props, ST_SCALE_LOCKED, D_TRANSLATE(ST_SCALE_LOCKED));
obs_property_set_modified_callback(p, modifiedcb3);
obs_properties_add_float(props, ST_SCALE_SCALE, D_TRANSLATE(ST_SCALE_SCALE), 0.01, 5.0, 0.01);
obs_properties_add_float(props, ST_SCALE_WIDTH, D_TRANSLATE(ST_SCALE_WIDTH), 0.01, 5.0, 0.01);
obs_properties_add_float(props, ST_SCALE_HEIGHT, D_TRANSLATE(ST_SCALE_HEIGHT), 0.01, 5.0, 0.01);
_fx->properties(props);
}
void filter::shader::shader_instance::load(obs_data_t* data)
{
update(data);
}
void filter::shader::shader_instance::update(obs_data_t* data)
{
_scale_locked = obs_data_get_bool(data, ST_SCALE_LOCKED);
if (_scale_locked) {
_hscale = _wscale = obs_data_get_double(data, ST_SCALE_SCALE);
} else {
_wscale = obs_data_get_double(data, ST_SCALE_WIDTH);
_hscale = obs_data_get_double(data, ST_SCALE_HEIGHT);
}
_fx->update(data);
}
void filter::shader::shader_instance::activate()
{
_active = true;
}
void filter::shader::shader_instance::deactivate()
{
_active = false;
}
bool filter::shader::shader_instance::valid_param(std::shared_ptr<gs::effect_parameter> param)
{
if (strcmp(param->get_name().c_str(), "ImageSource") == 0)
return false;
if (strcmp(param->get_name().c_str(), "ImageSource_Size") == 0)
return false;
if (strcmp(param->get_name().c_str(), "ImageSource_Texel") == 0)
return false;
if (strcmp(param->get_name().c_str(), "ImageTarget_Size") == 0)
return false;
if (strcmp(param->get_name().c_str(), "ImageTarget_Texel") == 0)
return false;
return true;
}
void filter::shader::shader_instance::override_param(std::shared_ptr<gs::effect> effect)
{
auto p_source = effect->get_parameter("ImageSource");
auto p_source_size = effect->get_parameter("ImageSource_Size");
auto p_source_texel = effect->get_parameter("ImageSource_Texel");
if (p_source && (p_source->get_type() == gs::effect_parameter::type::Texture)) {
p_source->set_texture(_rt_tex);
}
if (p_source_size && (p_source_size->get_type() == gs::effect_parameter::type::Float2)) {
p_source_size->set_float2(_width, _height);
}
if (p_source_texel && (p_source_size->get_type() == gs::effect_parameter::type::Float2)) {
p_source_texel->set_float2(1.0f / _width, 1.0f / _height);
}
auto p_target_size = effect->get_parameter("ImageTarget_Size");
auto p_target_texel = effect->get_parameter("ImageTarget_Texel");
if (p_target_size && (p_target_size->get_type() == gs::effect_parameter::type::Float2)) {
p_target_size->set_float2(_swidth, _sheight);
}
if (p_target_texel && (p_target_texel->get_type() == gs::effect_parameter::type::Float2)) {
p_target_texel->set_float2(1.0f / _swidth, 1.0f / _sheight);
}
}
void filter::shader::shader_instance::enum_active_sources(obs_source_enum_proc_t r, void* p)
{
_fx->enum_active_sources(r, p);
}
void filter::shader::shader_instance::video_tick(float_t sec_since_last)
{
obs_source_t* target = obs_filter_get_target(_self);
{ // Update width and height.
_width = obs_source_get_base_width(target);
_height = obs_source_get_base_height(target);
_swidth = _width * _wscale;
_sheight = _height * _hscale;
}
if (_fx->tick(sec_since_last)) {
obs_data_t* data = obs_source_get_settings(_self);
update(data);
obs_data_release(data);
}
_rt_updated = false;
_rt2_updated = false;
}
void filter::shader::shader_instance::video_render(gs_effect_t* effect)
{
// Grab initial values.
obs_source_t* parent = obs_filter_get_parent(_self);
obs_source_t* target = obs_filter_get_target(_self);
gs_effect_t* effect_default = obs_get_base_effect(obs_base_effect::OBS_EFFECT_DEFAULT);
// Skip filter if anything is wrong.
if (!_active || !parent || !target || !_width || !_height || !effect_default) {
obs_source_skip_video_filter(_self);
return;
}
if (!_rt_updated) {
if (obs_source_process_filter_begin(_self, GS_RGBA, OBS_ALLOW_DIRECT_RENDERING)) {
auto op = _rt->render(_width, _height);
gs_blend_state_push();
gs_reset_blend_state();
gs_set_cull_mode(GS_NEITHER);
gs_enable_color(true, true, true, true);
gs_enable_blending(false);
gs_enable_depth_test(false);
gs_enable_stencil_test(false);
gs_enable_stencil_write(false);
gs_ortho(0, static_cast<float_t>(_width), 0, static_cast<float_t>(_height), -1., 1.);
obs_source_process_filter_end(_self, effect_default, _width, _height);
gs_blend_state_pop();
}
_rt_tex = _rt->get_texture();
_rt_updated = true;
}
if (!_rt2_updated) {
try {
auto op = _rt2->render(_swidth, _sheight);
_fx->render();
} catch (...) {
obs_source_skip_video_filter(_self);
}
_rt2_tex = _rt2->get_texture();
_rt2_updated = true;
}
if (!_rt2_tex)
return;
gs_effect_t* ef = effect ? effect : effect_default;
if (gs_eparam_t* prm = gs_effect_get_param_by_name(ef, "image"))
gs_effect_set_texture(prm, _rt2_tex->get_object());
while (gs_effect_loop(ef, "Draw")) {
gs_draw_sprite(nullptr, 0, _swidth, _sheight);
}
}
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