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am 2cb8acc9: am 12119732: Merge "Add new hid command." into mnc-dev

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* commit '2cb8acc9cf587bc0171a70e00500d89d2f577c3c':
  Add new `hid` command.
This commit is contained in:
Michael Wright
2015-06-23 13:05:47 +00:00
committed by Android Git Automerger
parent 8471e833f6 2cb8acc9cf
commit 8022f38ada
11 changed files with 1105 additions and 1 deletions
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18
cmds/hid/Android.mk Normal file
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# Copyright 2015 The Android Open Source Project
#
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES := $(call all-subdir-java-files)
LOCAL_MODULE := hid
LOCAL_JNI_SHARED_LIBRARIES := libhidcommand_jni
include $(BUILD_JAVA_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := hid
LOCAL_SRC_FILES := hid
LOCAL_MODULE_TAGS := optional
LOCAL_MODULE_CLASS := EXECUTABLES
include $(BUILD_PREBUILT)
include $(call all-makefiles-under,$(LOCAL_PATH))

0
cmds/hid/MODULE_LICENSE_APACHE2 Normal file
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190
cmds/hid/NOTICE Normal file
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Copyright (c) 2005-2008, The Android Open Source Project
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
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
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cmds/hid/hid Executable file
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#!/system/bin/sh
#
# Script to start "hid" on the device, which has a very rudimentary
# shell.
#
base=/system
export CLASSPATH=$base/framework/hid.jar
exec app_process $base/bin com.android.commands.hid.Hid "$@"

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cmds/hid/jni/Android.mk Normal file
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LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES := \
com_android_commands_hid_Device.cpp
LOCAL_C_INCLUDES := \
$(JNI_H_INCLUDE) \
frameworks/base/core/jni
LOCAL_SHARED_LIBRARIES := \
libandroid_runtime \
liblog \
libnativehelper \
libutils
LOCAL_MODULE := libhidcommand_jni
LOCAL_MODULE_TAGS := optional
LOCAL_CFLAGS += -Wall
include $(BUILD_SHARED_LIBRARY)

253
cmds/hid/jni/com_android_commands_hid_Device.cpp Normal file
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/*
* Copyright (C) 2015 The Android Open Source Project
*
* 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.
*/
#define LOG_TAG "HidCommandDevice"
#include "com_android_commands_hid_Device.h"
#include <linux/uhid.h>
#include <fcntl.h>
#include <cstdio>
#include <cstring>
#include <memory>
#include <unistd.h>
#include <android_runtime/AndroidRuntime.h>
#include <android_runtime/Log.h>
#include <android_os_MessageQueue.h>
#include <core_jni_helpers.h>
#include <jni.h>
#include <JNIHelp.h>
#include <ScopedPrimitiveArray.h>
#include <ScopedUtfChars.h>
#include <utils/Log.h>
#include <utils/Looper.h>
#include <utils/StrongPointer.h>
namespace android {
namespace uhid {
static const char* UHID_PATH = "/dev/uhid";
static const size_t UHID_MAX_NAME_LENGTH = 128;
static struct {
jmethodID onDeviceOpen;
jmethodID onDeviceError;
} gDeviceCallbackClassInfo;
static int handleLooperEvents(int fd, int events, void* data) {
Device* d = reinterpret_cast<Device*>(data);
return d->handleEvents(events);
}
static void checkAndClearException(JNIEnv* env, const char* methodName) {
if (env->ExceptionCheck()) {
ALOGE("An exception was thrown by callback '%s'.", methodName);
LOGE_EX(env);
env->ExceptionClear();
}
}
DeviceCallback::DeviceCallback(JNIEnv* env, jobject callback) :
mCallbackObject(env->NewGlobalRef(callback)) { }
DeviceCallback::~DeviceCallback() {
JNIEnv* env = AndroidRuntime::getJNIEnv();
env->DeleteGlobalRef(mCallbackObject);
}
void DeviceCallback::onDeviceError() {
JNIEnv* env = AndroidRuntime::getJNIEnv();
env->CallVoidMethod(mCallbackObject, gDeviceCallbackClassInfo.onDeviceError);
checkAndClearException(env, "onDeviceError");
}
void DeviceCallback::onDeviceOpen() {
JNIEnv* env = AndroidRuntime::getJNIEnv();
env->CallVoidMethod(mCallbackObject, gDeviceCallbackClassInfo.onDeviceOpen);
checkAndClearException(env, "onDeviceOpen");
}
Device* Device::open(int32_t id, const char* name, int32_t vid, int32_t pid,
std::unique_ptr<uint8_t[]> descriptor, size_t descriptorSize,
std::unique_ptr<DeviceCallback> callback, sp<Looper> looper) {
int fd = ::open(UHID_PATH, O_RDWR | O_CLOEXEC);
if (fd < 0) {
ALOGE("Failed to open uhid: %s", strerror(errno));
return nullptr;
}
struct uhid_event ev;
memset(&ev, 0, sizeof(ev));
ev.type = UHID_CREATE;
strncpy((char*)ev.u.create.name, name, UHID_MAX_NAME_LENGTH);
ev.u.create.rd_data = descriptor.get();
ev.u.create.rd_size = descriptorSize;
ev.u.create.bus = BUS_BLUETOOTH;
ev.u.create.vendor = vid;
ev.u.create.product = pid;
ev.u.create.version = 0;
ev.u.create.country = 0;
errno = 0;
ssize_t ret = TEMP_FAILURE_RETRY(::write(fd, &ev, sizeof(ev)));
if (ret < 0 || ret != sizeof(ev)) {
::close(fd);
ALOGE("Failed to create uhid node: %s", strerror(errno));
return nullptr;
}
// Wait for the device to actually be created.
ret = TEMP_FAILURE_RETRY(::read(fd, &ev, sizeof(ev)));
if (ret < 0 || ev.type != UHID_START) {
::close(fd);
ALOGE("uhid node failed to start: %s", strerror(errno));
return nullptr;
}
return new Device(id, fd, std::move(callback), looper);
}
Device::Device(int32_t id, int fd, std::unique_ptr<DeviceCallback> callback, sp<Looper> looper) :
mId(id), mFd(fd), mDeviceCallback(std::move(callback)), mLooper(looper) {
looper->addFd(fd, 0, Looper::EVENT_INPUT, handleLooperEvents, reinterpret_cast<void*>(this));
}
Device::~Device() {
mLooper->removeFd(mFd);
struct uhid_event ev;
memset(&ev, 0, sizeof(ev));
ev.type = UHID_DESTROY;
TEMP_FAILURE_RETRY(::write(mFd, &ev, sizeof(ev)));
::close(mFd);
mFd = -1;
}
void Device::sendReport(uint8_t* report, size_t reportSize) {
struct uhid_event ev;
memset(&ev, 0, sizeof(ev));
ev.type = UHID_INPUT;
ev.u.input.size = reportSize;
memcpy(&ev.u.input.data, report, reportSize);
ssize_t ret = TEMP_FAILURE_RETRY(::write(mFd, &ev, sizeof(ev)));
if (ret < 0 || ret != sizeof(ev)) {
ALOGE("Failed to send hid event: %s", strerror(errno));
}
}
int Device::handleEvents(int events) {
if (events & (Looper::EVENT_ERROR | Looper::EVENT_HANGUP)) {
ALOGE("uhid node was closed or an error occurred. events=0x%x", events);
mDeviceCallback->onDeviceError();
return 0;
}
struct uhid_event ev;
ssize_t ret = TEMP_FAILURE_RETRY(::read(mFd, &ev, sizeof(ev)));
if (ret < 0) {
ALOGE("Failed to read from uhid node: %s", strerror(errno));
mDeviceCallback->onDeviceError();
return 0;
}
if (ev.type == UHID_OPEN) {
mDeviceCallback->onDeviceOpen();
}
return 1;
}
} // namespace uhid
std::unique_ptr<uint8_t[]> getData(JNIEnv* env, jbyteArray javaArray, size_t& outSize) {
ScopedByteArrayRO scopedArray(env, javaArray);
outSize = scopedArray.size();
std::unique_ptr<uint8_t[]> data(new uint8_t[outSize]);
for (size_t i = 0; i < outSize; i++) {
data[i] = static_cast<uint8_t>(scopedArray[i]);
}
return data;
}
static jlong openDevice(JNIEnv* env, jclass clazz, jstring rawName, jint id, jint vid, jint pid,
jbyteArray rawDescriptor, jobject queue, jobject callback) {
ScopedUtfChars name(env, rawName);
if (name.c_str() == nullptr) {
return 0;
}
size_t size;
std::unique_ptr<uint8_t[]> desc = getData(env, rawDescriptor, size);
std::unique_ptr<uhid::DeviceCallback> cb(new uhid::DeviceCallback(env, callback));
sp<Looper> looper = android_os_MessageQueue_getMessageQueue(env, queue)->getLooper();
uhid::Device* d = uhid::Device::open(
id, reinterpret_cast<const char*>(name.c_str()), vid, pid,
std::move(desc), size, std::move(cb), std::move(looper));
return reinterpret_cast<jlong>(d);
}
static void sendReport(JNIEnv* env, jclass clazz, jlong ptr,jbyteArray rawReport) {
size_t size;
std::unique_ptr<uint8_t[]> report = getData(env, rawReport, size);
uhid::Device* d = reinterpret_cast<uhid::Device*>(ptr);
if (d) {
d->sendReport(report.get(), size);
}
}
static void closeDevice(JNIEnv* env, jclass clazz, jlong ptr) {
uhid::Device* d = reinterpret_cast<uhid::Device*>(ptr);
if (d) {
delete d;
}
}
static JNINativeMethod sMethods[] = {
{ "nativeOpenDevice",
"(Ljava/lang/String;III[BLandroid/os/MessageQueue;"
"Lcom/android/commands/hid/Device$DeviceCallback;)J",
reinterpret_cast<void*>(openDevice) },
{ "nativeSendReport", "(J[B)V", reinterpret_cast<void*>(sendReport) },
{ "nativeCloseDevice", "(J)V", reinterpret_cast<void*>(closeDevice) },
};
int register_com_android_commands_hid_Device(JNIEnv* env) {
jclass clazz = FindClassOrDie(env, "com/android/commands/hid/Device$DeviceCallback");
uhid::gDeviceCallbackClassInfo.onDeviceOpen =
GetMethodIDOrDie(env, clazz, "onDeviceOpen", "()V");
uhid::gDeviceCallbackClassInfo.onDeviceError=
GetMethodIDOrDie(env, clazz, "onDeviceError", "()V");
return jniRegisterNativeMethods(env, "com/android/commands/hid/Device",
sMethods, NELEM(sMethods));
}
} // namespace android
jint JNI_OnLoad(JavaVM* jvm, void*) {
JNIEnv *env = NULL;
if (jvm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6)) {
return JNI_ERR;
}
if (android::register_com_android_commands_hid_Device(env) < 0 ){
return JNI_ERR;
}
return JNI_VERSION_1_6;
}

61
cmds/hid/jni/com_android_commands_hid_Device.h Normal file
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/*
* Copyright (C) 2015 The Android Open Source Project
*
* 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.
*/
#include <memory>
#include <jni.h>
#include <utils/Looper.h>
#include <utils/StrongPointer.h>
namespace android {
namespace uhid {
class DeviceCallback {
public:
DeviceCallback(JNIEnv* env, jobject callback);
~DeviceCallback();
void onDeviceOpen();
void onDeviceError();
private:
jobject mCallbackObject;
};
class Device {
public:
static Device* open(int32_t id, const char* name, int32_t vid, int32_t pid,
std::unique_ptr<uint8_t[]> descriptor, size_t descriptorSize,
std::unique_ptr<DeviceCallback> callback, sp<Looper> looper);
Device(int32_t id, int fd, std::unique_ptr<DeviceCallback> callback, sp<Looper> looper);
~Device();
void sendReport(uint8_t* report, size_t reportSize);
void close();
int handleEvents(int events);
private:
int32_t mId;
int mFd;
std::unique_ptr<DeviceCallback> mDeviceCallback;
sp<Looper> mLooper;
};
} // namespace uhid
} // namespace android

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cmds/hid/src/com/android/commands/hid/Device.java Normal file
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/*
* Copyright (C) 2015 The Android Open Source Project
*
* 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.
*/
package com.android.commands.hid;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Looper;
import android.os.Message;
import android.os.MessageQueue;
import android.os.SystemClock;
import android.util.Log;
import com.android.internal.os.SomeArgs;
public class Device {
private static final String TAG = "HidDevice";
// Minimum amount of time to wait before sending input events to a device. Even though we're
// guaranteed that the device has been created and opened by the input system, there's still a
// window in which the system hasn't started reading events out of it. If a stream of events
// begins in during this window (like a button down event) and *then* we start reading, we're
// liable to ignore the whole stream.
private static final int MIN_WAIT_FOR_FIRST_EVENT = 150;
private static final int MSG_OPEN_DEVICE = 1;
private static final int MSG_SEND_REPORT = 2;
private static final int MSG_CLOSE_DEVICE = 3;
private final int mId;
private final HandlerThread mThread;
private final DeviceHandler mHandler;
private long mEventTime;
private final Object mCond = new Object();
static {
System.loadLibrary("hidcommand_jni");
}
private static native long nativeOpenDevice(String name, int id, int vid, int pid,
byte[] descriptor, MessageQueue queue, DeviceCallback callback);
private static native void nativeSendReport(long ptr, byte[] data);
private static native void nativeCloseDevice(long ptr);
public Device(int id, String name, int vid, int pid, byte[] descriptor, byte[] report) {
mId = id;
mThread = new HandlerThread("HidDeviceHandler");
mThread.start();
mHandler = new DeviceHandler(mThread.getLooper());
SomeArgs args = SomeArgs.obtain();
args.argi1 = id;
args.argi2 = vid;
args.argi3 = pid;
if (name != null) {
args.arg1 = name;
} else {
args.arg1 = id + ":" + vid + ":" + pid;
}
args.arg2 = descriptor;
args.arg3 = report;
mHandler.obtainMessage(MSG_OPEN_DEVICE, args).sendToTarget();
mEventTime = SystemClock.uptimeMillis() + MIN_WAIT_FOR_FIRST_EVENT;
}
public void sendReport(byte[] report) {
Message msg = mHandler.obtainMessage(MSG_SEND_REPORT, report);
mHandler.sendMessageAtTime(msg, mEventTime);
}
public void addDelay(int delay) {
mEventTime += delay;
}
public void close() {
Message msg = mHandler.obtainMessage(MSG_CLOSE_DEVICE);
msg.setAsynchronous(true);
mHandler.sendMessageAtTime(msg, mEventTime + 1);
try {
synchronized (mCond) {
mCond.wait();
}
} catch (InterruptedException ignore) {}
}
private class DeviceHandler extends Handler {
private long mPtr;
private int mBarrierToken;
public DeviceHandler(Looper looper) {
super(looper);
}
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_OPEN_DEVICE:
SomeArgs args = (SomeArgs) msg.obj;
mPtr = nativeOpenDevice((String) args.arg1, args.argi1, args.argi2, args.argi3,
(byte[]) args.arg2, getLooper().myQueue(), new DeviceCallback());
nativeSendReport(mPtr, (byte[]) args.arg3);
pauseEvents();
break;
case MSG_SEND_REPORT:
if (mPtr != 0) {
nativeSendReport(mPtr, (byte[]) msg.obj);
} else {
Log.e(TAG, "Tried to send report to closed device.");
}
break;
case MSG_CLOSE_DEVICE:
if (mPtr != 0) {
nativeCloseDevice(mPtr);
getLooper().quitSafely();
mPtr = 0;
} else {
Log.e(TAG, "Tried to close already closed device.");
}
synchronized (mCond) {
mCond.notify();
}
break;
default:
throw new IllegalArgumentException("Unknown device message");
}
}
public void pauseEvents() {
mBarrierToken = getLooper().myQueue().postSyncBarrier();
}
public void resumeEvents() {
getLooper().myQueue().removeSyncBarrier(mBarrierToken);
mBarrierToken = 0;
}
}
private class DeviceCallback {
public void onDeviceOpen() {
mHandler.resumeEvents();
}
public void onDeviceError() {
Message msg = mHandler.obtainMessage(MSG_CLOSE_DEVICE);
msg.setAsynchronous(true);
msg.sendToTarget();
}
}
}

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cmds/hid/src/com/android/commands/hid/Event.java Normal file
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/*
* Copyright (C) 2015 The Android Open Source Project
*
* 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.
*/
package com.android.commands.hid;
import android.util.JsonReader;
import android.util.JsonToken;
import android.util.Log;
import java.io.InputStreamReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
public class Event {
private static final String TAG = "HidEvent";
public static final String COMMAND_REGISTER = "register";
public static final String COMMAND_DELAY = "delay";
public static final String COMMAND_REPORT = "report";
private int mId;
private String mCommand;
private String mName;
private byte[] mDescriptor;
private int mVid;
private int mPid;
private byte[] mReport;
private int mDuration;
public int getId() {
return mId;
}
public String getCommand() {
return mCommand;
}
public String getName() {
return mName;
}
public byte[] getDescriptor() {
return mDescriptor;
}
public int getVendorId() {
return mVid;
}
public int getProductId() {
return mPid;
}
public byte[] getReport() {
return mReport;
}
public int getDuration() {
return mDuration;
}
public String toString() {
return "Event{id=" + mId
+ ", command=" + String.valueOf(mCommand)
+ ", name=" + String.valueOf(mName)
+ ", descriptor=" + Arrays.toString(mDescriptor)
+ ", vid=" + mVid
+ ", pid=" + mPid
+ ", report=" + Arrays.toString(mReport)
+ ", duration=" + mDuration
+ "}";
}
private static class Builder {
private Event mEvent;
public Builder() {
mEvent = new Event();
}
public void setId(int id) {
mEvent.mId = id;
}
private void setCommand(String command) {
mEvent.mCommand = command;
}
public void setName(String name) {
mEvent.mName = name;
}
public void setDescriptor(byte[] descriptor) {
mEvent.mDescriptor = descriptor;
}
public void setReport(byte[] report) {
mEvent.mReport = report;
}
public void setVid(int vid) {
mEvent.mVid = vid;
}
public void setPid(int pid) {
mEvent.mPid = pid;
}
public void setDuration(int duration) {
mEvent.mDuration = duration;
}
public Event build() {
if (mEvent.mId == -1) {
throw new IllegalStateException("No event id");
} else if (mEvent.mCommand == null) {
throw new IllegalStateException("Event does not contain a command");
}
if (COMMAND_REGISTER.equals(mEvent.mCommand)) {
if (mEvent.mDescriptor == null) {
throw new IllegalStateException("Device registration is missing descriptor");
}
} else if (COMMAND_DELAY.equals(mEvent.mCommand)) {
if (mEvent.mDuration <= 0) {
throw new IllegalStateException("Delay has missing or invalid duration");
}
} else if (COMMAND_REPORT.equals(mEvent.mCommand)) {
if (mEvent.mReport == null) {
throw new IllegalStateException("Report command is missing report data");
}
}
return mEvent;
}
}
public static class Reader {
private JsonReader mReader;
public Reader(InputStreamReader in) {
mReader = new JsonReader(in);
mReader.setLenient(true);
}
public Event getNextEvent() throws IOException {
Event e = null;
while (e == null && mReader.peek() != JsonToken.END_DOCUMENT) {
Event.Builder eb = new Event.Builder();
try {
mReader.beginObject();
while (mReader.hasNext()) {
String name = mReader.nextName();
switch (name) {
case "id":
eb.setId(readInt());
break;
case "command":
eb.setCommand(mReader.nextString());
break;
case "descriptor":
eb.setDescriptor(readData());
break;
case "name":
eb.setName(mReader.nextString());
break;
case "vid":
eb.setVid(readInt());
break;
case "pid":
eb.setPid(readInt());
break;
case "report":
eb.setReport(readData());
break;
case "duration":
eb.setDuration(readInt());
break;
default:
mReader.skipValue();
}
}
mReader.endObject();
} catch (IllegalStateException ex) {
error("Error reading in object, ignoring.", ex);
consumeRemainingElements();
mReader.endObject();
continue;
}
e = eb.build();
}
return e;
}
private byte[] readData() throws IOException {
ArrayList<Integer> data = new ArrayList<Integer>();
try {
mReader.beginArray();
while (mReader.hasNext()) {
data.add(Integer.decode(mReader.nextString()));
}
mReader.endArray();
} catch (IllegalStateException|NumberFormatException e) {
consumeRemainingElements();
mReader.endArray();
throw new IllegalStateException("Encountered malformed data.", e);
}
byte[] rawData = new byte[data.size()];
for (int i = 0; i < data.size(); i++) {
int d = data.get(i);
if ((d & 0xFF) != d) {
throw new IllegalStateException("Invalid data, all values must be byte-sized");
}
rawData[i] = (byte)d;
}
return rawData;
}
private int readInt() throws IOException {
String val = mReader.nextString();
return Integer.decode(val);
}
private void consumeRemainingElements() throws IOException {
while (mReader.hasNext()) {
mReader.skipValue();
}
}
}
private static void error(String msg) {
error(msg, null);
}
private static void error(String msg, Exception e) {
System.out.println(msg);
Log.e(TAG, msg);
if (e != null) {
Log.e(TAG, Log.getStackTraceString(e));
}
}
}

133
cmds/hid/src/com/android/commands/hid/Hid.java Normal file
View File

@@ -0,0 +1,133 @@
/*
* Copyright (C) 2015 The Android Open Source Project
*
* 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.
*/
package com.android.commands.hid;
import android.os.SystemClock;
import android.util.JsonReader;
import android.util.JsonToken;
import android.util.Log;
import android.util.SparseArray;
import libcore.io.IoUtils;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
public class Hid {
private static final String TAG = "HID";
private final Event.Reader mReader;
private final SparseArray<Device> mDevices;
private static void usage() {
error("Usage: hid [FILE]");
}
public static void main(String[] args) {
if (args.length != 1) {
usage();
System.exit(1);
}
InputStream stream = null;
try {
if (args[0].equals("-")) {
stream = System.in;
} else {
File f = new File(args[0]);
stream = new FileInputStream(f);
}
(new Hid(stream)).run();
} catch (Exception e) {
error("HID injection failed.", e);
System.exit(1);
} finally {
IoUtils.closeQuietly(stream);
}
}
private Hid(InputStream in) {
mDevices = new SparseArray<Device>();
try {
mReader = new Event.Reader(new InputStreamReader(in, "UTF-8"));
} catch (UnsupportedEncodingException e) {
throw new RuntimeException(e);
}
}
private void run() {
try {
Event e = null;
while ((e = mReader.getNextEvent()) != null) {
process(e);
}
} catch (IOException ex) {
error("Error reading in events.", ex);
}
for (int i = 0; i < mDevices.size(); i++) {
mDevices.valueAt(i).close();
}
}
private void process(Event e) {
final int index = mDevices.indexOfKey(e.getId());
if (index >= 0) {
Device d = mDevices.valueAt(index);
if (Event.COMMAND_DELAY.equals(e.getCommand())) {
d.addDelay(e.getDuration());
} else if (Event.COMMAND_REPORT.equals(e.getCommand())) {
d.sendReport(e.getReport());
} else {
error("Unknown command \"" + e.getCommand() + "\". Ignoring event.");
}
} else {
registerDevice(e);
}
}
private void registerDevice(Event e) {
if (!Event.COMMAND_REGISTER.equals(e.getCommand())) {
throw new IllegalStateException(
"Tried to send command \"" + e.getCommand() + "\" to an unregistered device!");
}
int id = e.getId();
Device d = new Device(id, e.getName(), e.getVendorId(), e.getProductId(),
e.getDescriptor(), e.getReport());
mDevices.append(id, d);
}
private static void error(String msg) {
error(msg, null);
}
private static void error(String msg, Exception e) {
System.out.println(msg);
Log.e(TAG, msg);
if (e != null) {
Log.e(TAG, Log.getStackTraceString(e));
}
}
}

2
core/jni/android_view_DisplayEventReceiver.cpp
View File

@@ -77,7 +77,7 @@ NativeDisplayEventReceiver::NativeDisplayEventReceiver(JNIEnv* env,
jobject receiverWeak, const sp<MessageQueue>& messageQueue) :
mReceiverWeakGlobal(env->NewGlobalRef(receiverWeak)),
mMessageQueue(messageQueue), mWaitingForVsync(false) {
ALOGV("receiver %p ~ Initializing input event receiver.", this);
ALOGV("receiver %p ~ Initializing display event receiver.", this);
}
NativeDisplayEventReceiver::~NativeDisplayEventReceiver() {