diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/joystick.cpp | 69 | ||||
| -rw-r--r-- | src/opcodes.cpp | 87 |
2 files changed, 156 insertions, 0 deletions
diff --git a/src/joystick.cpp b/src/joystick.cpp new file mode 100644 index 0000000..1b40650 --- /dev/null +++ b/src/joystick.cpp @@ -0,0 +1,69 @@ +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +// +// Copyright Drew Noakes 2013-2016 + +#include "joystick.hpp" + +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <iostream> +#include <string> +#include <sstream> +#include "unistd.h" + + + +void Joystick::init(int joystickNumber) { + std::stringstream sstm; + sstm << "/dev/input/js" << joystickNumber; + openPath(sstm.str(), false); +} + +void Joystick::openPath(std::string devicePath, bool blocking) +{ + // Open the device using either blocking or non-blocking + _fd = open(devicePath.c_str(), blocking ? O_RDONLY : O_RDONLY | O_NONBLOCK); +} + +bool Joystick::sample(JoystickEvent* event) +{ + int bytes = read(_fd, event, sizeof(*event)); + + if (bytes == -1) + return false; + + // NOTE if this condition is not met, we're probably out of sync and this + // Joystick instance is likely unusable + return bytes == sizeof(*event); +} + +bool Joystick::isFound() +{ + return _fd >= 0; +} + +Joystick::~Joystick() +{ + close(_fd); +} + +std::ostream& operator<<(std::ostream& os, const JoystickEvent& e) +{ + os << "type=" << static_cast<int>(e.type) + << " number=" << static_cast<int>(e.number) + << " value=" << static_cast<int>(e.value); + return os; +} + + diff --git a/src/opcodes.cpp b/src/opcodes.cpp new file mode 100644 index 0000000..d3e3c9b --- /dev/null +++ b/src/opcodes.cpp @@ -0,0 +1,87 @@ +/* + opcodes.cpp + Copyright (C) 2021 Richard Knight + + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser 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 <plugin.h> +#include "linux/joystick.h" +#include "joystick.hpp" + +struct jstick : csnd::Plugin<2, 1> { + static constexpr char const *otypes = "k[]k[]"; + static constexpr char const *itypes = "i"; + Joystick js; + MYFLT* saxis; + MYFLT* sbuttons; + + int init() { + csound->plugin_deinit(this); + csnd::Vector<MYFLT> &axis = outargs.vector_data<MYFLT>(0); + csnd::Vector<MYFLT> &buttons = outargs.vector_data<MYFLT>(1); + + saxis = (MYFLT*) csound->calloc(4*sizeof(MYFLT)); + sbuttons = (MYFLT*) csound->calloc(12*sizeof(MYFLT)); + + axis.init(csound, 4); + buttons.init(csound, 12); + js.init((int)inargs[0]); + if (!js.isFound()) { + return csound->init_error("cannot open joypad"); + } + return OK; + } + + + int deinit() { + delete js; + return OK; + } + + int kperf() { + csnd::Vector<MYFLT> &axis = outargs.vector_data<MYFLT>(0); + csnd::Vector<MYFLT> &buttons = outargs.vector_data<MYFLT>(1); + axis.init(csound, 4); + buttons.init(csound, 12); + JoystickEvent event; + bool isAxis; + int type; + MYFLT val; + while (js.sample(&event)) { + isAxis = event.isAxis(); + type = event.number; + val = event.value; + } + if (isAxis) { + saxis[type] = FL(((32767.0)+val)/65534); + } else { + sbuttons[type] = val; + } + memcpy(axis.data_array(), saxis, sizeof(MYFLT)*4); + memcpy(buttons.data_array(), sbuttons, sizeof(MYFLT)*12); + + return OK; + } +}; + + +#include <modload.h> + +void csnd::on_load(csnd::Csound *csound) { + csnd::plugin<jstick>(csound, "jstick", csnd::thread::ik); +} |