obs-StreamFX/source/filter-custom-shader.cpp
2018-03-20 12:50:17 +01:00

766 lines
26 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-custom-shader.h"
#include "strings.h"
#include <vector>
#include <tuple>
#include <fstream>
extern "C" {
#pragma warning (push)
#pragma warning (disable: 4201)
#include "libobs/util/platform.h"
#include "libobs/graphics/graphics.h"
#include "libobs/graphics/matrix4.h"
#pragma warning (pop)
}
#define S "Filter.CustomShader"
#define S_TYPE "Filter.CustomShader.Type"
#define S_TYPE_TEXT "Filter.CustomShader.Type.Text"
#define S_TYPE_FILE "Filter.CustomShader.Type.File"
#define S_CONTENT_TEXT "Filter.CustomShader.Content.Text"
#define S_CONTENT_FILE "Filter.CustomShader.Content.File"
#define DEFAULT_SHADER ""
/** Shader Definitions
* - Only one technique, any number of passes.
* - Technique must be named 'Draw'.
* - Parameters are split by the last underscore (_) to determine if it is a special parameter or not.
*
* Predefined Parameters:
* - ViewProj: The current view projection matrix (float4x4).
* - ViewSize: The current rendered size (float2).
* - ViewSizeI: The current rendered size as an int (int2).
* - Time: Time passed during total rendering in seconds (float).
* - TimeActive: Time since last activation (float).
* - image: The source being filtered (texture2d).
*
* Texture Special Parameters:
* - $(name)_Size: Texture Size (float2).
* - $(name)_SizeI: Texture Size (int2).
* - $(name)_Texel: Texture Texel Size (1/Texture Size) (float2).
**/
enum class ShaderType : int64_t {
Text,
File
};
static Filter::CustomShader* handler;
INITIALIZER(HandlerInit) {
initializerFunctions.push_back([] {
handler = new Filter::CustomShader();
});
finalizerFunctions.push_back([] {
delete handler;
});
}
Filter::CustomShader::CustomShader() {
memset(&sourceInfo, 0, sizeof(obs_source_info));
sourceInfo.id = "obs-stream-effects-filter-custom-shader";
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.video_tick = video_tick;
sourceInfo.video_render = video_render;
obs_register_source(&sourceInfo);
}
Filter::CustomShader::~CustomShader() {}
const char * Filter::CustomShader::get_name(void *) {
return P_TRANSLATE(S);
}
void Filter::CustomShader::get_defaults(obs_data_t *data) {
obs_data_set_default_int(data, S_TYPE, (int64_t)ShaderType::Text);
obs_data_set_default_string(data, S_CONTENT_TEXT, DEFAULT_SHADER);
}
obs_properties_t * Filter::CustomShader::get_properties(void *ptr) {
obs_properties_t *pr = obs_properties_create_param(ptr, nullptr);
obs_property_t *p;
p = obs_properties_add_list(pr, S_TYPE, P_TRANSLATE(S_TYPE), obs_combo_type::OBS_COMBO_TYPE_LIST,
obs_combo_format::OBS_COMBO_FORMAT_INT);
obs_property_list_add_int(p, P_TRANSLATE(S_TYPE_TEXT), (int64_t)ShaderType::Text);
obs_property_list_add_int(p, P_TRANSLATE(S_TYPE_FILE), (int64_t)ShaderType::File);
obs_property_set_modified_callback(p, modified_properties);
p = obs_properties_add_text(pr, S_CONTENT_TEXT, P_TRANSLATE(S_CONTENT_TEXT),
obs_text_type::OBS_TEXT_MULTILINE);
std::string defaultPath = obs_module_file("effects/displace.effect");
if (ptr)
defaultPath = reinterpret_cast<Instance*>(ptr)->GetShaderFile();
p = obs_properties_add_path(pr, S_CONTENT_FILE, P_TRANSLATE(S_CONTENT_FILE),
obs_path_type::OBS_PATH_FILE, "OBS Studio Effect (*.effect);;Any File (*.*)", defaultPath.c_str());
if (ptr)
reinterpret_cast<Instance*>(ptr)->get_properties(pr);
return pr;
}
bool Filter::CustomShader::modified_properties(obs_properties_t *pr, obs_property_t *, obs_data_t *data) {
ShaderType shaderType = (ShaderType)obs_data_get_int(data, S_TYPE);
switch (shaderType) {
case ShaderType::Text:
obs_property_set_visible(obs_properties_get(pr, S_CONTENT_TEXT), true);
obs_property_set_visible(obs_properties_get(pr, S_CONTENT_FILE), false);
break;
case ShaderType::File:
obs_property_set_visible(obs_properties_get(pr, S_CONTENT_TEXT), false);
obs_property_set_visible(obs_properties_get(pr, S_CONTENT_FILE), true);
break;
}
Instance* ptr = static_cast<Instance*>(obs_properties_get_param(pr));
for (Instance::Parameter& prm : ptr->m_effectParameters) {
switch (prm.type) {
case gs::effect_parameter::type::Texture:
bool isSource = obs_data_get_int(data, prm.uiNames[0].c_str()) == 1;
obs_property_set_visible(obs_properties_get(pr, prm.uiNames[1].c_str()), isSource);
obs_property_set_visible(obs_properties_get(pr, prm.uiNames[2].c_str()), !isSource);
break;
}
}
return true;
}
void * Filter::CustomShader::create(obs_data_t *data, obs_source_t *src) {
return new Instance(data, src);
}
void Filter::CustomShader::destroy(void *ptr) {
delete reinterpret_cast<Instance*>(ptr);
}
uint32_t Filter::CustomShader::get_width(void *ptr) {
return reinterpret_cast<Instance*>(ptr)->get_width();
}
uint32_t Filter::CustomShader::get_height(void *ptr) {
return reinterpret_cast<Instance*>(ptr)->get_height();
}
void Filter::CustomShader::update(void *ptr, obs_data_t *data) {
reinterpret_cast<Instance*>(ptr)->update(data);
}
void Filter::CustomShader::activate(void *ptr) {
reinterpret_cast<Instance*>(ptr)->activate();
}
void Filter::CustomShader::deactivate(void *ptr) {
reinterpret_cast<Instance*>(ptr)->activate();
}
void Filter::CustomShader::video_tick(void *ptr, float time) {
reinterpret_cast<Instance*>(ptr)->video_tick(time);
}
void Filter::CustomShader::video_render(void *ptr, gs_effect_t *effect) {
reinterpret_cast<Instance*>(ptr)->video_render(effect);
}
Filter::CustomShader::Instance::Instance(obs_data_t *data, obs_source_t *source) {
m_source = source;
m_effect.path = obs_module_file("effects/displace.effect");
m_effect.createTime = time_t(0);
m_effect.modifiedTime = time_t(0);
m_effect.size = 0;
m_effect.lastCheck = 0;
m_effect.effect = nullptr;
m_renderTarget = std::make_unique<gs::rendertarget>(GS_RGBA, GS_ZS_NONE);
m_activeTime = 0.0f;
m_renderTime = 0.0f;
update(data);
}
Filter::CustomShader::Instance::~Instance() {}
void Filter::CustomShader::Instance::update(obs_data_t *data) {
ShaderType shaderType = (ShaderType)obs_data_get_int(data, S_TYPE);
if (shaderType == ShaderType::Text) {
const char* shaderText = obs_data_get_string(data, S_CONTENT_TEXT);
try {
m_effect.effect = std::make_unique<gs::effect>(shaderText, "Text Shader");
} catch (std::runtime_error& ex) {
const char* filterName = obs_source_get_name(m_source);
P_LOG_ERROR("[%s] Shader loading failed with error(s): %s", filterName, ex.what());
}
} else if (shaderType == ShaderType::File) {
CheckShaderFile(obs_data_get_string(data, S_CONTENT_FILE), 0.0f);
}
m_effectParameters.clear();
if (m_effect.effect && m_effect.effect->count_parameters() > 0) {
for (auto p : m_effect.effect->get_parameters()) {
std::string p_name = p.get_name();
std::string p_desc = p_name;
if (IsSpecialParameter(p_name, p.get_type()))
continue;
Parameter prm;
prm.name = p_name;
prm.type = p.get_type();
switch (p.get_type()) {
case gs::effect_parameter::type::Boolean:
{
prm.uiNames.push_back(p_name);
prm.uiDescriptions.push_back(p_desc);
prm.value.b = obs_data_get_bool(data, p_name.c_str());
break;
}
case gs::effect_parameter::type::Float:
case gs::effect_parameter::type::Float2:
case gs::effect_parameter::type::Float3:
case gs::effect_parameter::type::Float4:
{
{
prm.uiNames.push_back(p_name + "0");
prm.uiDescriptions.push_back(p_desc + "[0]");
prm.value.f[0] = (float_t)obs_data_get_double(data, prm.uiNames.back().c_str());
}
if (p.get_type() >= gs::effect_parameter::type::Float2) {
prm.uiNames.push_back(p_name + "1");
prm.uiDescriptions.push_back(p_desc + "[1]");
prm.value.f[1] = (float_t)obs_data_get_double(data, prm.uiNames.back().c_str());
}
if (p.get_type() >= gs::effect_parameter::type::Float3) {
prm.uiNames.push_back(p_name + "2");
prm.uiDescriptions.push_back(p_desc + "[2]");
prm.value.f[2] = (float_t)obs_data_get_double(data, prm.uiNames.back().c_str());
}
if (p.get_type() >= gs::effect_parameter::type::Float4) {
prm.uiNames.push_back(p_name + "3");
prm.uiDescriptions.push_back(p_desc + "[3]");
prm.value.f[3] = (float_t)obs_data_get_double(data, prm.uiNames.back().c_str());
}
break;
}
case gs::effect_parameter::type::Integer:
case gs::effect_parameter::type::Integer2:
case gs::effect_parameter::type::Integer3:
case gs::effect_parameter::type::Integer4:
{
{
prm.uiNames.push_back(p_name + "0");
prm.uiDescriptions.push_back(p_desc + "[0]");
prm.value.i[0] = (int32_t)obs_data_get_int(data, prm.uiNames.back().c_str());
}
if (p.get_type() >= gs::effect_parameter::type::Integer2) {
prm.uiNames.push_back(p_name + "1");
prm.uiDescriptions.push_back(p_desc + "[1]");
prm.value.i[1] = (int32_t)obs_data_get_int(data, prm.uiNames.back().c_str());
}
if (p.get_type() >= gs::effect_parameter::type::Integer3) {
prm.uiNames.push_back(p_name + "2");
prm.uiDescriptions.push_back(p_desc + "[2]");
prm.value.i[2] = (int32_t)obs_data_get_int(data, prm.uiNames.back().c_str());
}
if (p.get_type() >= gs::effect_parameter::type::Integer4) {
prm.uiNames.push_back(p_name + "3");
prm.uiDescriptions.push_back(p_desc + "[3]");
prm.value.i[3] = (int32_t)obs_data_get_int(data, prm.uiNames.back().c_str());
}
break;
}
case gs::effect_parameter::type::Texture:
{
prm.uiNames.push_back(p_name + "_type");
prm.uiDescriptions.push_back(p_desc + " Type");
prm.value.textureIsSource = obs_data_get_int(data, prm.uiNames.back().c_str()) == 1;
prm.uiNames.push_back(p_name + "_source");
prm.uiDescriptions.push_back(p_desc);
prm.value.source.name = obs_data_get_string(data, prm.uiNames.back().c_str());
prm.uiNames.push_back(p_name + "_file");
prm.uiDescriptions.push_back(p_desc);
if (obs_data_has_user_value(data, prm.uiNames.back().c_str())) {
prm.value.file.path = obs_data_get_string(data, prm.uiNames.back().c_str());
} else {
prm.value.file.path = obs_module_file("white.png");
}
break;
}
}
m_effectParameters.emplace_back(prm);
}
}
for (Parameter& prm : m_effectParameters) {
switch (prm.type) {
case gs::effect_parameter::type::Boolean:
prm.value.b = obs_data_get_bool(data, prm.uiNames[0].c_str());
break;
case gs::effect_parameter::type::Float4:
prm.value.f[3] = (float_t)obs_data_get_double(data, prm.uiNames[3].c_str());
case gs::effect_parameter::type::Float3:
prm.value.f[2] = (float_t)obs_data_get_double(data, prm.uiNames[2].c_str());
case gs::effect_parameter::type::Float2:
prm.value.f[1] = (float_t)obs_data_get_double(data, prm.uiNames[1].c_str());
case gs::effect_parameter::type::Float:
prm.value.f[0] = (float_t)obs_data_get_double(data, prm.uiNames[0].c_str());
break;
case gs::effect_parameter::type::Integer4:
prm.value.i[3] = (int32_t)obs_data_get_int(data, prm.uiNames[3].c_str());
case gs::effect_parameter::type::Integer3:
prm.value.i[2] = (int32_t)obs_data_get_int(data, prm.uiNames[2].c_str());
case gs::effect_parameter::type::Integer2:
prm.value.i[1] = (int32_t)obs_data_get_int(data, prm.uiNames[1].c_str());
case gs::effect_parameter::type::Integer:
prm.value.i[0] = (int32_t)obs_data_get_int(data, prm.uiNames[0].c_str());
break;
case gs::effect_parameter::type::Texture:
prm.value.textureIsSource = obs_data_get_int(data, prm.uiNames[0].c_str()) == 1;
std::string nName = obs_data_get_string(data, prm.uiNames[1].c_str());
if (nName != prm.value.source.name) {
prm.value.source.name = nName;
prm.value.source.dirty = true;
}
std::string nPath = obs_data_get_string(data, prm.uiNames[2].c_str());
if (nPath != prm.value.file.path) {
prm.value.file.path = nPath;
prm.value.file.dirty = true;
}
break;
}
}
}
uint32_t Filter::CustomShader::Instance::get_width() {
return 0;
}
uint32_t Filter::CustomShader::Instance::get_height() {
return 0;
}
void Filter::CustomShader::Instance::activate() {
m_isActive = true;
m_activeTime = 0.0f;
}
void Filter::CustomShader::Instance::deactivate() {
m_isActive = false;
}
void Filter::CustomShader::Instance::video_tick(float time) {
CheckShaderFile(m_effect.path, time);
CheckTextures(time);
if (m_isActive)
m_activeTime += time;
m_renderTime += time;
}
void Filter::CustomShader::Instance::video_render(gs_effect_t *effect) {
if (!m_source || !m_isActive) {
obs_source_skip_video_filter(m_source);
return;
}
obs_source_t *parent = obs_filter_get_parent(m_source);
obs_source_t *target = obs_filter_get_target(m_source);
if (!parent || !target || !m_effect.effect) {
obs_source_skip_video_filter(m_source);
return;
}
uint32_t baseW = obs_source_get_base_width(target),
baseH = obs_source_get_base_height(target);
if (!baseW || !baseH) {
obs_source_skip_video_filter(m_source);
return;
}
// Render original source to texture.
{
auto op = m_renderTarget->render(baseW, baseH);
vec4 black; vec4_zero(&black);
gs_ortho(0, (float_t)baseW, 0, (float_t)baseH, 0, 1);
gs_clear(GS_CLEAR_COLOR, &black, 0, 0);
if (obs_source_process_filter_begin(m_source, GS_RGBA, OBS_NO_DIRECT_RENDERING)) {
obs_source_process_filter_end(m_source,
effect ? effect : obs_get_base_effect(OBS_EFFECT_DEFAULT), baseW, baseH);
}
}
gs_texture_t* sourceTexture = m_renderTarget->get_object();
if (!sourceTexture) {
obs_source_skip_video_filter(m_source);
return;
}
// Apply Parameters
try {
if (m_effect.effect->has_parameter("ViewSize", gs::effect_parameter::type::Float2))
m_effect.effect->get_parameter("ViewSize").set_float2(float_t(baseW), float_t(baseH));
if (m_effect.effect->has_parameter("ViewSizeI", gs::effect_parameter::type::Integer2))
m_effect.effect->get_parameter("ViewSizeI").set_int2(baseW, baseH);
if (m_effect.effect->has_parameter("Time", gs::effect_parameter::type::Float))
m_effect.effect->get_parameter("Time").set_float(m_renderTime);
if (m_effect.effect->has_parameter("TimeActive", gs::effect_parameter::type::Float))
m_effect.effect->get_parameter("TimeActive").set_float(m_activeTime);
/// "image" Specials
if (m_effect.effect->has_parameter("image_Size", gs::effect_parameter::type::Float2))
m_effect.effect->get_parameter("image_Size").set_float2(float_t(baseW), float_t(baseH));
if (m_effect.effect->has_parameter("image_SizeI", gs::effect_parameter::type::Float2))
m_effect.effect->get_parameter("image_SizeI").set_int2(baseW, baseH);
if (m_effect.effect->has_parameter("image_Texel", gs::effect_parameter::type::Float2))
m_effect.effect->get_parameter("image_Texel").set_float2(1.0f / float_t(baseW), 1.0f / float_t(baseH));
for (Parameter& prm : m_effectParameters) {
gs::effect_parameter eprm = m_effect.effect->get_parameter(prm.name);
switch (prm.type) {
case gs::effect_parameter::type::Boolean:
eprm.set_bool(prm.value.b);
break;
case gs::effect_parameter::type::Integer:
eprm.set_int(prm.value.i[0]);
break;
case gs::effect_parameter::type::Integer2:
eprm.set_int2(prm.value.i[0], prm.value.i[1]);
break;
case gs::effect_parameter::type::Integer3:
eprm.set_int3(prm.value.i[0], prm.value.i[1], prm.value.i[2]);
break;
case gs::effect_parameter::type::Integer4:
eprm.set_int4(prm.value.i[0], prm.value.i[1], prm.value.i[2], prm.value.i[3]);
break;
case gs::effect_parameter::type::Float:
eprm.set_float(prm.value.f[0]);
break;
case gs::effect_parameter::type::Float2:
eprm.set_float2(prm.value.f[0], prm.value.f[1]);
break;
case gs::effect_parameter::type::Float3:
eprm.set_float3(prm.value.f[0], prm.value.f[1], prm.value.f[2]);
break;
case gs::effect_parameter::type::Float4:
eprm.set_float4(prm.value.f[0], prm.value.f[1], prm.value.f[2], prm.value.f[3]);
break;
case gs::effect_parameter::type::Texture:
if (prm.value.textureIsSource) {
if (prm.value.source.rendertarget && prm.value.source.source) {
uint32_t w, h;
w = obs_source_get_width(prm.value.source.source);
h = obs_source_get_height(prm.value.source.source);
{
auto op = prm.value.source.rendertarget->render(w, h);
vec4 black; vec4_zero(&black);
gs_ortho(0, (float_t)w, 0, (float_t)h, 0, 1);
gs_clear(GS_CLEAR_COLOR, &black, 0, 0);
obs_source_video_render(prm.value.source.source);
}
eprm.set_texture(prm.value.source.rendertarget->get_object());
}
} else {
if (prm.value.file.texture) {
eprm.set_texture(prm.value.file.texture);
}
}
break;
}
}
} catch (...) {
obs_source_skip_video_filter(m_source);
return;
}
gs_reset_blend_state();
gs_enable_depth_test(false);
while (gs_effect_loop(m_effect.effect->get_object(), "Draw")) {
obs_source_draw(sourceTexture, 0, 0, baseW, baseH, false);
}
}
static bool UpdateSourceListCB(void *ptr, obs_source_t* src) {
obs_property_t* p = (obs_property_t*)ptr;
obs_property_list_add_string(p, obs_source_get_name(src), obs_source_get_name(src));
return true;
}
static void UpdateSourceList(obs_property_t* p) {
obs_property_list_clear(p);
obs_enum_sources(UpdateSourceListCB, p);
}
void Filter::CustomShader::Instance::get_properties(obs_properties_t *pr) {
if (!m_effect.effect)
return;
for (Parameter& prm : m_effectParameters) {
switch (prm.type) {
case gs::effect_parameter::type::Boolean:
obs_properties_add_bool(pr, prm.uiNames[0].c_str(), prm.uiDescriptions[0].c_str());
break;
case gs::effect_parameter::type::Float:
case gs::effect_parameter::type::Float2:
case gs::effect_parameter::type::Float3:
case gs::effect_parameter::type::Float4:
obs_properties_add_float(pr, prm.uiNames[0].c_str(), prm.uiDescriptions[0].c_str(), FLT_MIN, FLT_MAX, FLT_EPSILON);
if (prm.type >= gs::effect_parameter::type::Float2)
obs_properties_add_float(pr, prm.uiNames[1].c_str(), prm.uiDescriptions[1].c_str(), FLT_MIN, FLT_MAX, FLT_EPSILON);
if (prm.type >= gs::effect_parameter::type::Float3)
obs_properties_add_float(pr, prm.uiNames[2].c_str(), prm.uiDescriptions[2].c_str(), FLT_MIN, FLT_MAX, FLT_EPSILON);
if (prm.type >= gs::effect_parameter::type::Float4)
obs_properties_add_float(pr, prm.uiNames[3].c_str(), prm.uiDescriptions[3].c_str(), FLT_MIN, FLT_MAX, FLT_EPSILON);
break;
case gs::effect_parameter::type::Integer:
case gs::effect_parameter::type::Integer2:
case gs::effect_parameter::type::Integer3:
case gs::effect_parameter::type::Integer4:
obs_properties_add_int(pr, prm.uiNames[0].c_str(), prm.uiDescriptions[0].c_str(), INT_MIN, INT_MAX, 1);
if (prm.type >= gs::effect_parameter::type::Integer2)
obs_properties_add_int(pr, prm.uiNames[1].c_str(), prm.uiDescriptions[1].c_str(), INT_MIN, INT_MAX, 1);
if (prm.type >= gs::effect_parameter::type::Integer3)
obs_properties_add_int(pr, prm.uiNames[2].c_str(), prm.uiDescriptions[2].c_str(), INT_MIN, INT_MAX, 1);
if (prm.type >= gs::effect_parameter::type::Integer4)
obs_properties_add_int(pr, prm.uiNames[3].c_str(), prm.uiDescriptions[3].c_str(), INT_MIN, INT_MAX, 1);
break;
case gs::effect_parameter::type::Texture:
obs_property * pt = obs_properties_add_list(pr,
prm.uiNames[0].c_str(),
prm.uiDescriptions[0].c_str(),
OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_INT);
obs_property_list_add_int(pt, "File", 0);
obs_property_list_add_int(pt, "Source", 1);
obs_property_set_modified_callback(pt, modified_properties);
pt = obs_properties_add_list(pr,
prm.uiNames[1].c_str(),
prm.uiDescriptions[1].c_str(),
OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_STRING);
UpdateSourceList(pt);
obs_properties_add_path(pr,
prm.uiNames[2].c_str(),
prm.uiDescriptions[2].c_str(),
OBS_PATH_FILE, "", prm.value.file.path.c_str());
break;
}
}
return;
}
void Filter::CustomShader::Instance::CheckShaderFile(std::string file, float_t time) {
bool doRefresh = false;
// Update if the paths are different.
if (file != m_effect.path) {
m_effect.path = file;
doRefresh = true;
}
if (file.empty()) {
m_effect.effect = nullptr;
return;
}
// Don't check for updates if the last update was less than 1/2 seconds away.
m_effect.lastCheck += time;
if (m_effect.lastCheck < 0.5f) {
if (!doRefresh)
return;
} else {
m_effect.lastCheck = m_effect.lastCheck - 0.5f;
}
struct stat stats;
if (os_stat(m_effect.path.c_str(), &stats) == 0) {
doRefresh = doRefresh ||
(m_effect.createTime != stats.st_ctime) ||
(m_effect.modifiedTime != stats.st_mtime);
m_effect.createTime = stats.st_ctime;
m_effect.modifiedTime = stats.st_mtime;
}
if (!m_effect.effect)
doRefresh = true;
if (doRefresh) {
try {
std::vector<char> shaderContent;
{ // gs_effect_create_from_file caches results, which is bad for us.
std::ifstream fs(file.c_str(), std::ios::binary);
if (fs.bad())
throw std::runtime_error("Failed to open file.");
size_t beg = fs.tellg();
fs.seekg(0, std::ios::end);
size_t sz = size_t(fs.tellg()) - beg;
shaderContent.resize(sz + 1);
fs.seekg(0, std::ios::beg);
fs.read(shaderContent.data(), sz);
fs.close();
shaderContent[sz] = '\0';
}
m_effect.effect = std::make_unique<gs::effect>(shaderContent.data(), m_effect.path);
} catch (std::runtime_error& ex) {
const char* filterName = obs_source_get_name(m_source);
P_LOG_ERROR("[%s] Shader loading failed with error(s): %s", filterName, ex.what());
}
}
}
std::string Filter::CustomShader::Instance::GetShaderFile() {
return m_effect.path;
}
void Filter::CustomShader::Instance::CheckTextures(float_t time) {
for (Parameter& prm : m_effectParameters) {
if (prm.type != gs::effect_parameter::type::Texture)
continue;
if (prm.value.textureIsSource) {
// If the source field is empty, simply clear the source reference.
if (prm.value.source.name.empty()) {
if (prm.value.source.source)
obs_source_release(m_source);
prm.value.source.source = nullptr;
continue;
}
// Ensure that a render target exists.
if (!prm.value.source.rendertarget)
prm.value.source.rendertarget = std::make_shared<gs::rendertarget>(GS_RGBA, GS_ZS_NONE);
// Finally check if the source property was modified or is empty.
if (prm.value.source.dirty || !prm.value.source.source) {
prm.value.source.dirty = false;
if (prm.value.source.source)
obs_source_release(prm.value.source.source);
prm.value.source.source = obs_get_source_by_name(prm.value.source.name.c_str());
}
} else {
bool doRefresh = false;
// If the path is empty, don't attempt to update any files and simply null the texture.
if (prm.value.file.path.empty()) {
prm.value.file.texture = nullptr;
continue;
}
// If the property was modified or the texture is empty, force a refresh.
if (prm.value.file.dirty || !prm.value.file.texture) {
doRefresh = true;
}
// Skip testing if the last test was less than 1/2 of a second away.
prm.value.file.lastCheck += time;
if (prm.value.file.lastCheck < 0.5f) {
if (!doRefresh)
continue;
} else {
prm.value.file.lastCheck = prm.value.file.lastCheck - 0.5f;
}
// Test if the file was modified.
struct stat stats;
if (os_stat(prm.value.file.path.c_str(), &stats) == 0) {
doRefresh = doRefresh ||
(prm.value.file.createTime != stats.st_ctime) ||
(prm.value.file.modifiedTime != stats.st_mtime) ||
(prm.value.file.fileSize != stats.st_size);
prm.value.file.createTime = stats.st_ctime;
prm.value.file.modifiedTime = stats.st_mtime;
prm.value.file.fileSize = stats.st_size;
}
if (doRefresh) {
prm.value.file.dirty = false;
try {
prm.value.file.texture = std::make_shared<gs::texture>(prm.value.file.path);
} catch (std::runtime_error& ex) {
const char* filterName = obs_source_get_name(m_source);
P_LOG_ERROR("[%s] Loading texture file '%s' failed with error(s): %s",
filterName, prm.value.file.path.c_str(), ex.what());
}
}
}
}
}
bool Filter::CustomShader::Instance::IsSpecialParameter(std::string name, gs::effect_parameter::type type) {
std::pair<std::string, gs::effect_parameter::type> reservedParameters[] = {
{ "ViewProj", gs::effect_parameter::type::Matrix },
{ "ViewSize", gs::effect_parameter::type::Float2 },
{ "ViewSizeI", gs::effect_parameter::type::Integer2 },
{ "Time", gs::effect_parameter::type::Float },
{ "TimeActive", gs::effect_parameter::type::Float },
{ "image", gs::effect_parameter::type::Texture }
};
std::pair<std::string, gs::effect_parameter::type> textureParameters[] = {
{ "Size", gs::effect_parameter::type::Float2 },
{ "SizeI", gs::effect_parameter::type::Integer2 },
{ "Texel", gs::effect_parameter::type::Float2 }
};
for (auto& kv : reservedParameters) {
if ((name == kv.first) && (type == kv.second))
return true;
}
// Split by last underscore(_) (if there is one).
size_t posUnderscore = name.find_last_of('_');
if (posUnderscore != std::string::npos) {
std::string firstPart, secondPart;
firstPart = name.substr(0, posUnderscore);
secondPart = name.substr(posUnderscore + 1);
try {
gs::effect_parameter prm = m_effect.effect->get_parameter(firstPart);
if (prm.get_type() == gs::effect_parameter::type::Texture) {
for (auto& kv : reservedParameters) {
if ((secondPart == kv.first) && (type == kv.second))
return true;
}
}
} catch (...) {
return false;
}
}
return false;
}