mirror of
https://github.com/robbert-vdh/yabridge.git
synced 2026-05-07 03:50:11 +02:00
Robbert van der Helm
72 lines
2.6 KiB
C++
72 lines
2.6 KiB
C++
// yabridge: a Wine VST bridge
|
|
// Copyright (C) 2020-2021 Robbert van der Helm
|
|
//
|
|
// 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 3 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, see <https://www.gnu.org/licenses/>.
|
|
|
|
#pragma once
|
|
|
|
#include <optional>
|
|
|
|
#ifdef __WINE__
|
|
#include "../wine-host/boost-fix.h"
|
|
#endif
|
|
#include <boost/filesystem.hpp>
|
|
|
|
/**
|
|
* The interval in seconds between synchronizing the Wine plugin host's audio
|
|
* thread scheduling priority with the host's audio thread.
|
|
*
|
|
* @relates Vst2Bridge::last_audio_thread_priority_synchronization
|
|
*/
|
|
constexpr time_t audio_thread_priority_synchronization_interval = 10;
|
|
|
|
// The cannonical overloading template for `std::visitor`, not sure why this
|
|
// isn't part of the standard library
|
|
template <class... Ts>
|
|
struct overload : Ts... {
|
|
using Ts::operator()...;
|
|
};
|
|
template <class... Ts>
|
|
overload(Ts...) -> overload<Ts...>;
|
|
|
|
/**
|
|
* Return the path to the directory for story temporary files. This will be
|
|
* `$XDG_RUNTIME_DIR` if set, and `/tmp` otherwise.
|
|
*/
|
|
boost::filesystem::path get_temporary_directory();
|
|
|
|
/**
|
|
* Get the current thread's scheduling priority if the thread is using
|
|
* `SCHED_FIFO`. Returns a nullopt of the calling thread is not under realtime
|
|
* scheduling.
|
|
*/
|
|
std::optional<int> get_realtime_priority();
|
|
|
|
/**
|
|
* Set the scheduling policy to `SCHED_FIFO` with priority 5 for this process.
|
|
* We explicitly don't do this for wineserver itself since from my testing that
|
|
* can actually increase latencies.
|
|
*
|
|
* @param sched_fifo If true, set the current process/thread's scheudling policy
|
|
* to `SCHED_FIFO`. Otherwise reset it back to `SCHWED_OTHER`.
|
|
* @param priority The scheduling priority to use. The exact value usually
|
|
* doesn't really matter unless there are a lot of other active `SCHED_FIFO`
|
|
* background tasks. We'll use 5 as a default, but we'll periodically copy the
|
|
* priority set by the host on the audio threads.
|
|
*
|
|
* @return Whether the operation was successful or not. This will fail if the
|
|
* user does not have the privileges to set realtime priorities.
|
|
*/
|
|
bool set_realtime_priority(bool sched_fifo, int priority = 5);
|