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https://github.com/robbert-vdh/yabridge.git
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Robbert van der Helm
f03b9b1497
We'll periodically copy the scheduling priorities from the host's audio threads to the Wine plugin host's audio threads. The overhead of doing this is about 1 microsecond on my system, so doing this every cycle really adds up. But getting the Unix epoch time and comparing some timestamps has a neglegible overhead, so this should give you the best of both worlds. Next we'll do the same thing for VST3 plugins. As suggested by @jhernberg
49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
// yabridge: a Wine VST bridge
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// Copyright (C) 2020-2021 Robbert van der Helm
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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#include "utils.h"
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#include <sched.h>
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#include <boost/process/environment.hpp>
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namespace bp = boost::process;
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namespace fs = boost::filesystem;
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fs::path get_temporary_directory() {
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bp::environment env = boost::this_process::environment();
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if (!env["XDG_RUNTIME_DIR"].empty()) {
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return env["XDG_RUNTIME_DIR"].to_string();
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} else {
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return fs::temp_directory_path();
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}
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}
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std::optional<int> get_realtime_priority() {
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sched_param current_params{};
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if (sched_getparam(0, ¤t_params) == 0 &&
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current_params.sched_priority > 0) {
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return current_params.sched_priority;
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} else {
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return std::nullopt;
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}
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}
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bool set_realtime_priority(bool sched_fifo, int priority) {
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sched_param params{.sched_priority = (sched_fifo ? priority : 0)};
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return sched_setscheduler(0, sched_fifo ? SCHED_FIFO : SCHED_OTHER,
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¶ms) == 0;
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}
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