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obs-streamFX
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obs-streamFX/source/sources/source-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 "source-shader.hpp"
#include <stdexcept>
#include "strings.hpp"
#include "utility.hpp"
#define ST "Source.Shader"
#define ST_WIDTH ST ".Width"
#define ST_HEIGHT ST ".Height"
static std::shared_ptr<source::shader::shader_factory> factory_instance = nullptr;
void source::shader::shader_factory::initialize()
{
factory_instance = std::make_shared<source::shader::shader_factory>();
}
void source::shader::shader_factory::finalize()
{
factory_instance.reset();
}
std::shared_ptr<source::shader::shader_factory> source::shader::shader_factory::get()
{
return factory_instance;
}
static void get_defaults(obs_data_t* data)
{
obs_data_set_default_int(data, ST_WIDTH, 1920);
obs_data_set_default_int(data, ST_HEIGHT, 1080);
obs_data_set_default_string(data, S_SHADER_FILE, obs_module_file("shaders/source/example.effect"));
obs_data_set_default_string(data, S_SHADER_TECHNIQUE, "Draw");
}
source::shader::shader_factory::shader_factory()
{
memset(&_source_info, 0, sizeof(obs_source_info));
_source_info.id = "obs-stream-effects-source-shader";
_source_info.type = OBS_SOURCE_TYPE_INPUT;
_source_info.output_flags = OBS_SOURCE_VIDEO | OBS_SOURCE_CUSTOM_DRAW;
_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 source::shader::shader_instance(data, self));
} catch (std::exception& ex) {
P_LOG_ERROR("<source-shader> Failed to create source, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<source-shader> Failed to create source.");
}
return static_cast<void*>(nullptr);
};
_source_info.destroy = [](void* ptr) {
try {
delete reinterpret_cast<source::shader::shader_instance*>(ptr);
} catch (std::exception& ex) {
P_LOG_ERROR("<source-shader> Failed to delete source, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<source-shader> Failed to delete source.");
}
};
_source_info.get_properties = [](void* ptr) {
obs_properties_t* pr = obs_properties_create();
try {
if (ptr)
reinterpret_cast<source::shader::shader_instance*>(ptr)->properties(pr);
} catch (std::exception& ex) {
P_LOG_ERROR("<source-shader> Failed to retrieve options, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<source-shader> Failed to retrieve options.");
}
return pr;
};
_source_info.get_width = [](void* ptr) {
try {
if (ptr)
return reinterpret_cast<source::shader::shader_instance*>(ptr)->width();
} catch (std::exception& ex) {
P_LOG_ERROR("<source-shader> Failed to retrieve width, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<source-shader> Failed to retrieve width.");
}
return uint32_t(0);
};
_source_info.get_height = [](void* ptr) {
try {
if (ptr)
return reinterpret_cast<source::shader::shader_instance*>(ptr)->height();
} catch (std::exception& ex) {
P_LOG_ERROR("<source-shader> Failed to retrieve height, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<source-shader> Failed to retrieve height.");
}
return uint32_t(0);
};
_source_info.load = [](void* ptr, obs_data_t* data) {
try {
if (ptr)
reinterpret_cast<source::shader::shader_instance*>(ptr)->load(data);
} catch (std::exception& ex) {
P_LOG_ERROR("<source-shader> Failed to load, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<source-shader> Failed to load.");
}
};
_source_info.update = [](void* ptr, obs_data_t* data) {
try {
if (ptr)
reinterpret_cast<source::shader::shader_instance*>(ptr)->update(data);
} catch (std::exception& ex) {
P_LOG_ERROR("<source-shader> Failed to update, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<source-shader> Failed to update.");
}
};
_source_info.activate = [](void* ptr) {
try {
if (ptr)
reinterpret_cast<source::shader::shader_instance*>(ptr)->activate();
} catch (std::exception& ex) {
P_LOG_ERROR("<source-shader> Failed to activate, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<source-shader> Failed to activate.");
}
};
_source_info.deactivate = [](void* ptr) {
try {
if (ptr)
reinterpret_cast<source::shader::shader_instance*>(ptr)->deactivate();
} catch (std::exception& ex) {
P_LOG_ERROR("<source-shader> Failed to deactivate, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<source-shader> Failed to deactivate.");
}
};
_source_info.video_tick = [](void* ptr, float_t time) {
try {
if (ptr)
reinterpret_cast<source::shader::shader_instance*>(ptr)->video_tick(time);
} catch (std::exception& ex) {
P_LOG_ERROR("<source-shader> Failed to tick, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<source-shader> Failed to tick.");
}
};
_source_info.video_render = [](void* ptr, gs_effect_t* effect) {
try {
if (ptr)
reinterpret_cast<source::shader::shader_instance*>(ptr)->video_render(effect);
} catch (std::exception& ex) {
P_LOG_ERROR("<source-shader> Failed to render, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<source-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<source::shader::shader_instance*>(ptr)->enum_active_sources(enum_callback, param);
} catch (std::exception& ex) {
P_LOG_ERROR("<source-shader> Failed to enumerate sources, error: %s", ex.what());
} catch (...) {
P_LOG_ERROR("<source-shader> Failed to enumerate sources.");
}
};
obs_register_source(&_source_info);
}
source::shader::shader_factory::~shader_factory() {}
source::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(&source::shader::shader_instance::valid_param, this, std::placeholders::_1));
_fx->set_override_cb(std::bind(&source::shader::shader_instance::override_param, this, std::placeholders::_1));
_rt = std::make_shared<gs::rendertarget>(GS_RGBA, GS_ZS_NONE);
update(data);
}
source::shader::shader_instance::~shader_instance() {}
uint32_t source::shader::shader_instance::width()
{
return _width;
}
uint32_t source::shader::shader_instance::height()
{
return _height;
}
void source::shader::shader_instance::properties(obs_properties_t* props)
{
obs_properties_add_int(props, ST_WIDTH, D_TRANSLATE(ST_WIDTH), 1, 32768, 1);
obs_properties_add_int(props, ST_HEIGHT, D_TRANSLATE(ST_HEIGHT), 1, 32768, 1);
_fx->properties(props);
}
void source::shader::shader_instance::load(obs_data_t* data)
{
update(data);
}
void source::shader::shader_instance::update(obs_data_t* data)
{
_width = obs_data_get_int(data, ST_WIDTH);
_height = obs_data_get_int(data, ST_HEIGHT);
_fx->update(data);
}
void source::shader::shader_instance::activate()
{
_active = true;
}
void source::shader::shader_instance::deactivate()
{
_active = false;
}
bool source::shader::shader_instance::valid_param(std::shared_ptr<gs::effect_parameter> param)
{
return true;
}
void source::shader::shader_instance::override_param(std::shared_ptr<gs::effect> effect) {}
void source::shader::shader_instance::enum_active_sources(obs_source_enum_proc_t r, void* p)
{
_fx->enum_active_sources(r, p);
}
void source::shader::shader_instance::video_tick(float_t sec_since_last)
{
if (_fx->tick(sec_since_last)) {
obs_data_t* data = obs_source_get_settings(_self);
update(data);
obs_data_release(data);
}
_rt_updated = false;
}
void source::shader::shader_instance::video_render(gs_effect_t* effect)
{
// Grab initial values.
gs_effect_t* effect_default = obs_get_base_effect(obs_base_effect::OBS_EFFECT_DEFAULT);
// Skip filter if anything is wrong.
if (!_active || !_width || !_height || !effect_default) {
obs_source_skip_video_filter(_self);
return;
}
if (!_rt_updated) {
try {
auto op = _rt->render(_width, _height);
_fx->render();
} catch (...) {
}
_rt_tex = _rt->get_texture();
_rt_updated = true;
}
if (!_rt_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, _rt_tex->get_object());
while (gs_effect_loop(ef, "Draw")) {
gs_draw_sprite(nullptr, 0, _width, _height);
}
}
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