388 lines
11 KiB
Python
388 lines
11 KiB
Python
# ----------------------------------------------------------------------------
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# pyglet
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# Copyright (c) 2006-2008 Alex Holkner
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# Copyright (c) 2008-2021 pyglet contributors
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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# * Neither the name of pyglet nor the names of its
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# contributors may be used to endorse or promote products
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# derived from this software without specific prior written
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# permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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# ----------------------------------------------------------------------------
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import os
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import errno
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import ctypes
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import pyglet
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from pyglet.app.xlib import XlibSelectDevice
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from .base import Device, Control, RelativeAxis, AbsoluteAxis, Button, Joystick
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from .base import DeviceOpenException
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from .evdev_constants import *
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c = pyglet.lib.load_library('c')
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_IOC_NRBITS = 8
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_IOC_TYPEBITS = 8
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_IOC_SIZEBITS = 14
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_IOC_DIRBITS = 2
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_IOC_NRMASK = ((1 << _IOC_NRBITS) - 1)
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_IOC_TYPEMASK = ((1 << _IOC_TYPEBITS) - 1)
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_IOC_SIZEMASK = ((1 << _IOC_SIZEBITS) - 1)
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_IOC_DIRMASK = ((1 << _IOC_DIRBITS) - 1)
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_IOC_NRSHIFT = 0
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_IOC_TYPESHIFT = (_IOC_NRSHIFT + _IOC_NRBITS)
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_IOC_SIZESHIFT = (_IOC_TYPESHIFT + _IOC_TYPEBITS)
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_IOC_DIRSHIFT = (_IOC_SIZESHIFT + _IOC_SIZEBITS)
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_IOC_NONE = 0
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_IOC_WRITE = 1
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_IOC_READ = 2
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def _IOC(dir, type, nr, size):
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return ((dir << _IOC_DIRSHIFT) |
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(type << _IOC_TYPESHIFT) |
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(nr << _IOC_NRSHIFT) |
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(size << _IOC_SIZESHIFT))
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def _IOR(type, nr, struct):
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request = _IOC(_IOC_READ, ord(type), nr, ctypes.sizeof(struct))
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def f(fileno):
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buffer = struct()
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if c.ioctl(fileno, request, ctypes.byref(buffer)) < 0:
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err = ctypes.c_int.in_dll(c, 'errno').value
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raise OSError(err, errno.errorcode[err])
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return buffer
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return f
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def _IOR_len(type, nr):
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def f(fileno, buffer):
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request = _IOC(_IOC_READ, ord(type), nr, ctypes.sizeof(buffer))
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if c.ioctl(fileno, request, ctypes.byref(buffer)) < 0:
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err = ctypes.c_int.in_dll(c, 'errno').value
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raise OSError(err, errno.errorcode[err])
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return buffer
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return f
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def _IOR_str(type, nr):
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g = _IOR_len(type, nr)
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def f(fileno, len=256):
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return g(fileno, ctypes.create_string_buffer(len)).value
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return f
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time_t = ctypes.c_long
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suseconds_t = ctypes.c_long
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class timeval(ctypes.Structure):
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_fields_ = (
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('tv_sec', time_t),
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('tv_usec', suseconds_t)
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)
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class input_event(ctypes.Structure):
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_fields_ = (
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('time', timeval),
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('type', ctypes.c_uint16),
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('code', ctypes.c_uint16),
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('value', ctypes.c_int32)
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)
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class input_id(ctypes.Structure):
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_fields_ = (
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('bustype', ctypes.c_uint16),
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('vendor', ctypes.c_uint16),
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('product', ctypes.c_uint16),
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('version', ctypes.c_uint16),
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)
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class input_absinfo(ctypes.Structure):
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_fields_ = (
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('value', ctypes.c_int32),
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('minimum', ctypes.c_int32),
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('maximum', ctypes.c_int32),
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('fuzz', ctypes.c_int32),
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('flat', ctypes.c_int32),
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)
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EVIOCGVERSION = _IOR('E', 0x01, ctypes.c_int)
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EVIOCGID = _IOR('E', 0x02, input_id)
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EVIOCGNAME = _IOR_str('E', 0x06)
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EVIOCGPHYS = _IOR_str('E', 0x07)
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EVIOCGUNIQ = _IOR_str('E', 0x08)
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def EVIOCGBIT(fileno, ev, buffer):
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return _IOR_len('E', 0x20 + ev)(fileno, buffer)
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def EVIOCGABS(fileno, abs):
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buffer = input_absinfo()
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return _IOR_len('E', 0x40 + abs)(fileno, buffer)
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def get_set_bits(bytes):
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bits = set()
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j = 0
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for byte in bytes:
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for i in range(8):
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if byte & 1:
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bits.add(j + i)
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byte >>= 1
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j += 8
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return bits
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_abs_names = {
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ABS_X: AbsoluteAxis.X,
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ABS_Y: AbsoluteAxis.Y,
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ABS_Z: AbsoluteAxis.Z,
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ABS_RX: AbsoluteAxis.RX,
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ABS_RY: AbsoluteAxis.RY,
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ABS_RZ: AbsoluteAxis.RZ,
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ABS_HAT0X: AbsoluteAxis.HAT_X,
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ABS_HAT0Y: AbsoluteAxis.HAT_Y,
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}
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_rel_names = {
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REL_X: RelativeAxis.X,
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REL_Y: RelativeAxis.Y,
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REL_Z: RelativeAxis.Z,
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REL_RX: RelativeAxis.RX,
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REL_RY: RelativeAxis.RY,
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REL_RZ: RelativeAxis.RZ,
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REL_WHEEL: RelativeAxis.WHEEL,
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}
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def _create_control(fileno, event_type, event_code):
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if event_type == EV_ABS:
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raw_name = abs_raw_names.get(event_code, 'EV_ABS(%x)' % event_code)
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name = _abs_names.get(event_code)
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absinfo = EVIOCGABS(fileno, event_code)
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value = absinfo.value
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min = absinfo.minimum
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max = absinfo.maximum
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control = AbsoluteAxis(name, min, max, raw_name)
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control.value = value
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if name == 'hat_y':
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control.inverted = True
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elif event_type == EV_REL:
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raw_name = rel_raw_names.get(event_code, 'EV_REL(%x)' % event_code)
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name = _rel_names.get(event_code)
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# TODO min/max?
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control = RelativeAxis(name, raw_name)
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elif event_type == EV_KEY:
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raw_name = key_raw_names.get(event_code, 'EV_KEY(%x)' % event_code)
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name = None
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control = Button(name, raw_name)
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else:
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value = min = max = 0 # TODO
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return None
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control._event_type = event_type
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control._event_code = event_code
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return control
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def _create_joystick(device):
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# Look for something with an ABS X and ABS Y axis, and a joystick 0 button
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have_x = False
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have_y = False
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have_button = False
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for control in device.controls:
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if control._event_type == EV_ABS and control._event_code == ABS_X:
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have_x = True
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elif control._event_type == EV_ABS and control._event_code == ABS_Y:
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have_y = True
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elif control._event_type == EV_KEY and \
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control._event_code in (BTN_JOYSTICK, BTN_GAMEPAD):
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have_button = True
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if not (have_x and have_y and have_button):
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return
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return Joystick(device)
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event_types = {
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EV_KEY: KEY_MAX,
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EV_REL: REL_MAX,
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EV_ABS: ABS_MAX,
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EV_MSC: MSC_MAX,
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EV_LED: LED_MAX,
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EV_SND: SND_MAX,
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}
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class EvdevDevice(XlibSelectDevice, Device):
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_fileno = None
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def __init__(self, display, filename):
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self._filename = filename
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fileno = os.open(filename, os.O_RDONLY)
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# event_version = EVIOCGVERSION(fileno).value
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id = EVIOCGID(fileno)
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self.id_bustype = id.bustype
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self.id_vendor = hex(id.vendor)
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self.id_product = hex(id.product)
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self.id_version = id.version
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name = EVIOCGNAME(fileno)
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try:
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name = name.decode('utf-8')
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except UnicodeDecodeError:
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try:
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name = name.decode('latin-1')
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except UnicodeDecodeError:
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pass
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try:
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self.phys = EVIOCGPHYS(fileno)
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except OSError:
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self.phys = ''
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try:
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self.uniq = EVIOCGUNIQ(fileno)
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except OSError:
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self.uniq = ''
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self.controls = []
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self.control_map = {}
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event_types_bits = (ctypes.c_byte * 4)()
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EVIOCGBIT(fileno, 0, event_types_bits)
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for event_type in get_set_bits(event_types_bits):
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if event_type not in event_types:
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continue
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max_code = event_types[event_type]
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nbytes = max_code // 8 + 1
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event_codes_bits = (ctypes.c_byte * nbytes)()
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EVIOCGBIT(fileno, event_type, event_codes_bits)
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for event_code in get_set_bits(event_codes_bits):
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control = _create_control(fileno, event_type, event_code)
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if control:
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self.control_map[(event_type, event_code)] = control
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self.controls.append(control)
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os.close(fileno)
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super(EvdevDevice, self).__init__(display, name)
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def open(self, window=None, exclusive=False):
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super(EvdevDevice, self).open(window, exclusive)
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try:
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self._fileno = os.open(self._filename, os.O_RDONLY | os.O_NONBLOCK)
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except OSError as e:
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raise DeviceOpenException(e)
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pyglet.app.platform_event_loop._select_devices.add(self)
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def close(self):
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super(EvdevDevice, self).close()
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if not self._fileno:
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return
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pyglet.app.platform_event_loop._select_devices.remove(self)
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os.close(self._fileno)
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self._fileno = None
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def get_controls(self):
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return self.controls
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# XlibSelectDevice interface
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def fileno(self):
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return self._fileno
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def poll(self):
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# TODO
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return False
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def select(self):
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if not self._fileno:
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return
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events = (input_event * 64)()
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bytes = c.read(self._fileno, events, ctypes.sizeof(events))
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if bytes < 0:
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return
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n_events = bytes // ctypes.sizeof(input_event)
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for event in events[:n_events]:
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try:
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control = self.control_map[(event.type, event.code)]
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control.value = event.value
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except KeyError:
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pass
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_devices = {}
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def get_devices(display=None):
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base = '/dev/input'
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for filename in os.listdir(base):
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if filename.startswith('event'):
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path = os.path.join(base, filename)
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if path in _devices:
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continue
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try:
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_devices[path] = EvdevDevice(display, path)
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except OSError:
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pass
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return list(_devices.values())
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def get_joysticks(display=None):
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return [joystick
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for joystick
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in [_create_joystick(device)
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for device
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in get_devices(display)]
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if joystick is not None]
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