obs-StreamFX/source/obs/obs-source-tracker.cpp

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/*
* Modern effects for a modern Streamer
* Copyright (C) 2017-2018 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 "obs-source-tracker.hpp"
#include <stdexcept>
#include "obs/obs-tools.hpp"
#include "plugin.hpp"
static std::shared_ptr<obs::source_tracker> source_tracker_instance;
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void obs::source_tracker::source_create_handler(void* ptr, calldata_t* data) noexcept
try {
obs::source_tracker* self = reinterpret_cast<obs::source_tracker*>(ptr);
obs_source_t* target = nullptr;
calldata_get_ptr(data, "source", &target);
if (!target) {
return;
}
const char* name = obs_source_get_name(target);
if (!name) { // Do not track unnamed sources.
return;
}
obs_weak_source_t* weak = obs_source_get_weak_source(target);
if (!weak) { // This source has already been deleted, do not track.
return;
}
{
std::unique_lock<std::mutex> ul(self->_lock);
self->_sources.insert({std::string(name), {weak, obs::obs_weak_source_deleter}});
}
} catch (...) {
DLOG_ERROR("Unexpected exception in function '%s'.", __FUNCTION_NAME__);
}
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void obs::source_tracker::source_destroy_handler(void* ptr, calldata_t* data) noexcept
try {
obs::source_tracker* self = reinterpret_cast<obs::source_tracker*>(ptr);
obs_source_t* target = nullptr;
calldata_get_ptr(data, "source", &target);
if (!target) {
return;
}
const char* name = obs_source_get_name(target);
if (!name) { // Not tracking unnamed sources.
return;
}
{
std::unique_lock<std::mutex> ul(self->_lock);
auto found = self->_sources.find(std::string(name));
if (found == self->_sources.end()) {
return;
}
self->_sources.erase(found);
}
} catch (...) {
DLOG_ERROR("Unexpected exception in function '%s'.", __FUNCTION_NAME__);
}
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void obs::source_tracker::source_rename_handler(void* ptr, calldata_t* data) noexcept
try {
obs::source_tracker* self = reinterpret_cast<obs::source_tracker*>(ptr);
obs_source_t* target = nullptr;
const char* prev_name = nullptr;
const char* new_name = nullptr;
calldata_get_ptr(data, "source", &target);
calldata_get_string(data, "prev_name", &prev_name);
calldata_get_string(data, "new_name", &new_name);
if (strcmp(prev_name, new_name) == 0) {
// They weren't renamed at all, invalid event.
return;
}
{
std::unique_lock<std::mutex> ul(self->_lock);
auto found = self->_sources.find(std::string(prev_name));
if (found == self->_sources.end()) {
// Untracked source, insert.
obs_weak_source_t* weak = obs_source_get_weak_source(target);
if (!weak) {
return;
}
self->_sources.insert({new_name, {weak, obs::obs_weak_source_deleter}});
return;
}
// Insert at new key, remove old pair.
self->_sources.insert({new_name, found->second});
self->_sources.erase(found);
}
} catch (...) {
DLOG_ERROR("Unexpected exception in function '%s'.", __FUNCTION_NAME__);
}
void obs::source_tracker::initialize()
{
source_tracker_instance = std::make_shared<obs::source_tracker>();
}
void obs::source_tracker::finalize()
{
source_tracker_instance.reset();
}
std::shared_ptr<obs::source_tracker> obs::source_tracker::get()
{
return source_tracker_instance;
}
obs::source_tracker::source_tracker()
{
auto osi = obs_get_signal_handler();
signal_handler_connect(osi, "source_create", &source_create_handler, this);
signal_handler_connect(osi, "source_destroy", &source_destroy_handler, this);
signal_handler_connect(osi, "source_rename", &source_rename_handler, this);
}
obs::source_tracker::~source_tracker()
{
auto osi = obs_get_signal_handler();
if (osi) {
signal_handler_disconnect(osi, "source_create", &source_create_handler, this);
signal_handler_disconnect(osi, "source_destroy", &source_destroy_handler, this);
signal_handler_disconnect(osi, "source_rename", &source_rename_handler, this);
}
this->_sources.clear();
}
void obs::source_tracker::enumerate(enumerate_cb_t ecb, filter_cb_t fcb)
{
// Need func-local copy, otherwise we risk corruption if a new source is created or destroyed.
decltype(_sources) _clone;
{
std::unique_lock<std::mutex> ul(_lock);
_clone = _sources;
}
for (auto kv : _clone) {
auto source =
std::shared_ptr<obs_source_t>(obs_weak_source_get_source(kv.second.get()), obs::obs_source_deleter);
if (!source) {
continue;
}
if (fcb) {
if (fcb(kv.first, source.get())) {
continue;
}
}
if (ecb) {
if (ecb(kv.first, source.get())) {
break;
}
}
}
}
bool obs::source_tracker::filter_sources(std::string, obs_source_t* source)
{
return (obs_source_get_type(source) != OBS_SOURCE_TYPE_INPUT);
}
bool obs::source_tracker::filter_audio_sources(std::string, obs_source_t* source)
{
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std::uint32_t flags = obs_source_get_output_flags(source);
return !(flags & OBS_SOURCE_AUDIO) || (obs_source_get_type(source) != OBS_SOURCE_TYPE_INPUT);
}
bool obs::source_tracker::filter_video_sources(std::string, obs_source_t* source)
{
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std::uint32_t flags = obs_source_get_output_flags(source);
return !(flags & OBS_SOURCE_VIDEO) || (obs_source_get_type(source) != OBS_SOURCE_TYPE_INPUT);
}
bool obs::source_tracker::filter_transitions(std::string, obs_source_t* source)
{
return (obs_source_get_type(source) != OBS_SOURCE_TYPE_TRANSITION);
}
bool obs::source_tracker::filter_scenes(std::string, obs_source_t* source)
{
return (obs_source_get_type(source) != OBS_SOURCE_TYPE_SCENE);
}