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Add support for the legacy uinput interface

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Luiz Henrique Laurini 2021-05-08 14:13:22 -03:00 • committed by Simon Chan
parent abedd0b478
commit ae83fe3214
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1 changed files with 110 additions and 26 deletions
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136
server/src/main/java/com/genymobile/scrcpy/UinputDevice.java
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@ -6,6 +6,7 @@ import com.sun.jna.Native;
import com.sun.jna.Platform;
import com.sun.jna.Pointer;
import com.sun.jna.Structure;
import com.sun.jna.ptr.IntByReference;
import java.util.Arrays;
import java.util.List;
@ -15,6 +16,8 @@ public abstract class UinputDevice {
public static final int DEVICE_REMOVED = 1;
private static final int UINPUT_MAX_NAME_SIZE = 80;
private static final int ABS_MAX = 0x3f;
private static final int ABS_CNT = ABS_MAX + 1;
@SuppressWarnings("checkstyle:VisibilityModifier")
public static class InputId extends Structure {
@ -41,6 +44,22 @@ public abstract class UinputDevice {
}
}
@SuppressWarnings("checkstyle:VisibilityModifier")
public static class UinputUserDev extends Structure {
public byte[] name = new byte[UINPUT_MAX_NAME_SIZE];
public InputId id;
public int ffEffectsMax = 0;
public int[] absmax = new int[ABS_CNT];
public int[] absmin = new int[ABS_CNT];
public int[] absfuzz = new int[ABS_CNT];
public int[] absflat = new int[ABS_CNT];
@Override
protected List<String> getFieldOrder() {
return Arrays.asList("name", "id", "ffEffectsMax", "absmax", "absmin", "absfuzz", "absflat");
}
};
@SuppressWarnings("checkstyle:VisibilityModifier")
public static class InputAbsinfo extends Structure {
public int value = 0;
@ -96,6 +115,7 @@ public abstract class UinputDevice {
private static final int IOC_NONE = 0;
private static final int IOC_WRITE = 1;
private static final int IOC_READ = 2;
private static final int IOC_DIRSHIFT = 30;
private static final int IOC_TYPESHIFT = 8;
@ -113,6 +133,10 @@ public abstract class UinputDevice {
return ioc(IOC_NONE, type, nr, size);
}
private static int ior(int type, int nr, int size) {
return ioc(IOC_READ, type, nr, size);
}
private static int iow(int type, int nr, int size) {
return ioc(IOC_WRITE, type, nr, size);
}
@ -124,12 +148,13 @@ public abstract class UinputDevice {
private static final int UINPUT_IOCTL_BASE = 'U';
private static final int UI_GET_VERSION = ior(UINPUT_IOCTL_BASE, 45, 4); // 0.5+
private static final int UI_SET_EVBIT = iow(UINPUT_IOCTL_BASE, 100, 4);
private static final int UI_SET_KEYBIT = iow(UINPUT_IOCTL_BASE, 101, 4);
private static final int UI_SET_ABSBIT = iow(UINPUT_IOCTL_BASE, 103, 4);
private static final int UI_ABS_SETUP = iow(UINPUT_IOCTL_BASE, 4, new UinputAbsSetup().size());
private static final int UI_ABS_SETUP = iow(UINPUT_IOCTL_BASE, 4, new UinputAbsSetup().size()); // 0.5+
private static final int UI_DEV_SETUP = iow(UINPUT_IOCTL_BASE, 3, new UinputSetup().size());
private static final int UI_DEV_SETUP = iow(UINPUT_IOCTL_BASE, 3, new UinputSetup().size()); // 0.5+
private static final int UI_DEV_CREATE = io(UINPUT_IOCTL_BASE, 1, 0);
private static final int UI_DEV_DESTROY = io(UINPUT_IOCTL_BASE, 2, 0);
@ -161,15 +186,20 @@ public abstract class UinputDevice {
protected static final short ABS_HAT0Y = 0x11;
private int fd = -1;
private int[] absmax;
private int[] absmin;
private int[] absfuzz;
private int[] absflat;
public interface LibC extends Library {
int open(String pathname, int flags) throws LastErrorException;
int ioctl(int fd, long request, Object... args) throws LastErrorException;
long write(int fd, Pointer buf, long count) throws LastErrorException;
int close(int fd) throws LastErrorException;
}
private static LibC libC;
private static int version = 0;
/// Must be the first method called
public static void loadNativeLibraries() {
@ -183,6 +213,22 @@ public abstract class UinputDevice {
throw new UinputUnsupportedException(e);
}
if (version == 0) {
try {
IntByReference versionRef = new IntByReference();
libC.ioctl(fd, UI_GET_VERSION, versionRef);
version = versionRef.getValue();
} catch (LastErrorException e) {
version = -1;
}
if (version >= 0) {
Ln.i(String.format("Using uinput version 0.%d", version));
} else {
Ln.i(String.format("Using unknown uinput version. Assuming at least 0.3."));
}
}
if (hasKeys()) {
try {
libC.ioctl(fd, UI_SET_EVBIT, EV_KEY);
@ -198,28 +244,59 @@ public abstract class UinputDevice {
} catch (LastErrorException e) {
throw new RuntimeException("Could not enable absolute events.", e);
}
if (version < 5) {
absmax = new int[ABS_CNT];
absmin = new int[ABS_CNT];
absfuzz = new int[ABS_CNT];
absflat = new int[ABS_CNT];
}
setupAbs();
}
UinputSetup usetup = new UinputSetup();
usetup.id.bustype = BUS_USB;
usetup.id.vendor = getVendor();
usetup.id.product = getProduct();
byte[] name = getName().getBytes();
System.arraycopy(name, 0, usetup.name, 0, name.length);
if (version >= 5) {
UinputSetup usetup = new UinputSetup();
usetup.id.bustype = BUS_USB;
usetup.id.vendor = getVendor();
usetup.id.product = getProduct();
byte[] name = getName().getBytes();
System.arraycopy(name, 0, usetup.name, 0, name.length);
try {
libC.ioctl(fd, UI_DEV_SETUP, usetup);
} catch (LastErrorException e) {
close();
throw new RuntimeException("Couldn't setup uinput device.", e);
try {
libC.ioctl(fd, UI_DEV_SETUP, usetup);
} catch (LastErrorException e) {
close();
throw new RuntimeException("Could not setup uinput device.", e);
}
} else {
UinputUserDev userDev = new UinputUserDev();
userDev.id.bustype = BUS_USB;
userDev.id.vendor = getVendor();
userDev.id.product = getProduct();
byte[] name = getName().getBytes();
System.arraycopy(name, 0, userDev.name, 0, name.length);
userDev.absmax = absmax;
userDev.absmin = absmin;
userDev.absfuzz = absfuzz;
userDev.absflat = absflat;
userDev.write();
try {
libC.write(fd, userDev.getPointer(), userDev.size());
} catch (LastErrorException e) {
close();
throw new RuntimeException("Could not setup uinput device using legacy method.", e);
}
}
try {
libC.ioctl(fd, UI_DEV_CREATE);
} catch (LastErrorException e) {
close();
throw new RuntimeException("Couldn't create uinput device.", e);
throw new RuntimeException("Could not create uinput device.", e);
}
}
@ -262,18 +339,25 @@ public abstract class UinputDevice {
Ln.e("Could not add absolute event.", e);
}
UinputAbsSetup absSetup = new UinputAbsSetup();
if (version >= 5) {
UinputAbsSetup absSetup = new UinputAbsSetup();
absSetup.code = code;
absSetup.absinfo.minimum = minimum;
absSetup.absinfo.maximum = maximum;
absSetup.absinfo.fuzz = fuzz;
absSetup.absinfo.flat = flat;
absSetup.code = code;
absSetup.absinfo.minimum = minimum;
absSetup.absinfo.maximum = maximum;
absSetup.absinfo.fuzz = fuzz;
absSetup.absinfo.flat = flat;
try {
libC.ioctl(fd, UI_ABS_SETUP, absSetup);
} catch (LastErrorException e) {
Ln.e("Could not set absolute event info.", e);
try {
libC.ioctl(fd, UI_ABS_SETUP, absSetup);
} catch (LastErrorException e) {
Ln.e("Could not set absolute event info.", e);
}
} else {
absmin[code] = minimum;
absmax[code] = maximum;
absfuzz[code] = fuzz;
absflat[code] = flat;
}
}