/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server;
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import android.content.Context;
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import android.os.Handler;
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import android.os.Looper;
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import android.os.Message;
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import android.os.PowerManager;
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import android.os.PowerManager.WakeLock;
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import android.os.UEventObserver;
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import android.util.Pair;
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import android.util.Slog;
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import android.media.AudioManager;
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import android.util.Log;
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import android.view.InputDevice;
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import android.os.SystemProperties;
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import com.android.internal.R;
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import com.android.server.input.InputManagerService;
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import com.android.server.input.InputManagerService.WiredAccessoryCallbacks;
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import static com.android.server.input.InputManagerService.SW_HEADPHONE_INSERT;
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import static com.android.server.input.InputManagerService.SW_MICROPHONE_INSERT;
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import static com.android.server.input.InputManagerService.SW_LINEOUT_INSERT;
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import static com.android.server.input.InputManagerService.SW_HEADPHONE_INSERT_BIT;
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import static com.android.server.input.InputManagerService.SW_MICROPHONE_INSERT_BIT;
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import static com.android.server.input.InputManagerService.SW_LINEOUT_INSERT_BIT;
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import java.io.File;
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import java.io.FileReader;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Locale;
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/**
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* <p>WiredAccessoryManager monitors for a wired headset on the main board or dock using
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* both the InputManagerService notifyWiredAccessoryChanged interface and the UEventObserver
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* subsystem.
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*/
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final class WiredAccessoryManager implements WiredAccessoryCallbacks {
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private static final String TAG = WiredAccessoryManager.class.getSimpleName();
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private static final boolean LOG = false;
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private static final int BIT_HEADSET = (1 << 0);
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private static final int BIT_HEADSET_NO_MIC = (1 << 1);
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private static final int BIT_USB_HEADSET_ANLG = (1 << 2);
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private static final int BIT_USB_HEADSET_DGTL = (1 << 3);
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private static final int BIT_HDMI_AUDIO = (1 << 4);
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private static final int BIT_LINEOUT = (1 << 5);
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private static final int SUPPORTED_HEADSETS = (BIT_HEADSET | BIT_HEADSET_NO_MIC |
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BIT_USB_HEADSET_ANLG | BIT_USB_HEADSET_DGTL |
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BIT_HDMI_AUDIO | BIT_LINEOUT);
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private static final String NAME_H2W = "h2w";
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private static final String NAME_USB_AUDIO = "usb_audio";
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private static final String NAME_HDMI_AUDIO = "hdmi_audio";
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private static final String NAME_HDMI = "hdmi";
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private static final int MSG_NEW_DEVICE_STATE = 1;
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private static final int MSG_SYSTEM_READY = 2;
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private final Object mLock = new Object();
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private final WakeLock mWakeLock; // held while there is a pending route change
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private final AudioManager mAudioManager;
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private int mHeadsetState;
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private int mSwitchValues;
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private final WiredAccessoryObserver mObserver;
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private final WiredAccessoryExtconObserver mExtconObserver;
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private final InputManagerService mInputManager;
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private final boolean mUseDevInputEventForAudioJack;
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public WiredAccessoryManager(Context context, InputManagerService inputManager) {
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PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
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mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "WiredAccessoryManager");
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mWakeLock.setReferenceCounted(false);
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mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
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mInputManager = inputManager;
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mUseDevInputEventForAudioJack =
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context.getResources().getBoolean(R.bool.config_useDevInputEventForAudioJack);
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mExtconObserver = new WiredAccessoryExtconObserver();
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mObserver = new WiredAccessoryObserver();
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}
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private void onSystemReady() {
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if (mUseDevInputEventForAudioJack) {
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int switchValues = 0;
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if (mInputManager.getSwitchState(-1, InputDevice.SOURCE_ANY, SW_HEADPHONE_INSERT)
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== 1) {
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switchValues |= SW_HEADPHONE_INSERT_BIT;
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}
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if (mInputManager.getSwitchState(-1, InputDevice.SOURCE_ANY, SW_MICROPHONE_INSERT)
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== 1) {
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switchValues |= SW_MICROPHONE_INSERT_BIT;
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}
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if (mInputManager.getSwitchState(-1, InputDevice.SOURCE_ANY, SW_LINEOUT_INSERT) == 1) {
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switchValues |= SW_LINEOUT_INSERT_BIT;
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}
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notifyWiredAccessoryChanged(0, switchValues,
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SW_HEADPHONE_INSERT_BIT | SW_MICROPHONE_INSERT_BIT | SW_LINEOUT_INSERT_BIT);
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}
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if (ExtconUEventObserver.extconExists()) {
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if (mUseDevInputEventForAudioJack) {
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Log.w(TAG, "Both input event and extcon are used for audio jack,"
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+ " please just choose one.");
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}
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mExtconObserver.init();
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} else {
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mObserver.init();
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}
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}
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@Override
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public void notifyWiredAccessoryChanged(long whenNanos, int switchValues, int switchMask) {
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if (LOG) {
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Slog.v(TAG, "notifyWiredAccessoryChanged: when=" + whenNanos
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+ " bits=" + switchCodeToString(switchValues, switchMask)
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+ " mask=" + Integer.toHexString(switchMask));
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}
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synchronized (mLock) {
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int headset;
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mSwitchValues = (mSwitchValues & ~switchMask) | switchValues;
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switch (mSwitchValues &
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(SW_HEADPHONE_INSERT_BIT | SW_MICROPHONE_INSERT_BIT | SW_LINEOUT_INSERT_BIT)) {
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case 0:
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headset = 0;
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break;
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case SW_HEADPHONE_INSERT_BIT:
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headset = BIT_HEADSET_NO_MIC;
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break;
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case SW_LINEOUT_INSERT_BIT:
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headset = BIT_LINEOUT;
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break;
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case SW_HEADPHONE_INSERT_BIT | SW_MICROPHONE_INSERT_BIT:
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headset = BIT_HEADSET;
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break;
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case SW_MICROPHONE_INSERT_BIT:
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headset = BIT_HEADSET;
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break;
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default:
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headset = 0;
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break;
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}
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updateLocked(NAME_H2W,
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(mHeadsetState & ~(BIT_HEADSET | BIT_HEADSET_NO_MIC | BIT_LINEOUT)) | headset);
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}
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}
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@Override
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public void systemReady() {
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synchronized (mLock) {
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mWakeLock.acquire();
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Message msg = mHandler.obtainMessage(MSG_SYSTEM_READY, 0, 0, null);
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mHandler.sendMessage(msg);
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}
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}
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/**
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* Compare the existing headset state with the new state and pass along accordingly. Note
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* that this only supports a single headset at a time. Inserting both a usb and jacked headset
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* results in support for the last one plugged in. Similarly, unplugging either is seen as
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* unplugging all.
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*
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* @param newName One of the NAME_xxx variables defined above.
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* @param newState 0 or one of the BIT_xxx variables defined above.
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*/
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private void updateLocked(String newName, int newState) {
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// Retain only relevant bits
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int headsetState = newState & SUPPORTED_HEADSETS;
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int usb_headset_anlg = headsetState & BIT_USB_HEADSET_ANLG;
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int usb_headset_dgtl = headsetState & BIT_USB_HEADSET_DGTL;
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int h2w_headset = headsetState & (BIT_HEADSET | BIT_HEADSET_NO_MIC | BIT_LINEOUT);
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boolean h2wStateChange = true;
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boolean usbStateChange = true;
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if (LOG) {
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Slog.v(TAG, "newName=" + newName
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+ " newState=" + newState
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+ " headsetState=" + headsetState
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+ " prev headsetState=" + mHeadsetState);
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}
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if (mHeadsetState == headsetState) {
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Log.e(TAG, "No state change.");
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return;
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}
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// reject all suspect transitions: only accept state changes from:
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// - a: 0 headset to 1 headset
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// - b: 1 headset to 0 headset
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if (h2w_headset == (BIT_HEADSET | BIT_HEADSET_NO_MIC | BIT_LINEOUT)) {
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Log.e(TAG, "Invalid combination, unsetting h2w flag");
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h2wStateChange = false;
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}
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// - c: 0 usb headset to 1 usb headset
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// - d: 1 usb headset to 0 usb headset
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if (usb_headset_anlg == BIT_USB_HEADSET_ANLG && usb_headset_dgtl == BIT_USB_HEADSET_DGTL) {
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Log.e(TAG, "Invalid combination, unsetting usb flag");
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usbStateChange = false;
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}
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if (!h2wStateChange && !usbStateChange) {
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Log.e(TAG, "invalid transition, returning ...");
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return;
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}
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mWakeLock.acquire();
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Log.i(TAG, "MSG_NEW_DEVICE_STATE");
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Message msg = mHandler.obtainMessage(MSG_NEW_DEVICE_STATE, headsetState,
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mHeadsetState, "");
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mHandler.sendMessage(msg);
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mHeadsetState = headsetState;
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}
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private final Handler mHandler = new Handler(Looper.myLooper(), null, true) {
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@Override
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public void handleMessage(Message msg) {
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switch (msg.what) {
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case MSG_NEW_DEVICE_STATE:
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setDevicesState(msg.arg1, msg.arg2, (String) msg.obj);
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mWakeLock.release();
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break;
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case MSG_SYSTEM_READY:
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onSystemReady();
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mWakeLock.release();
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break;
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}
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}
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};
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private void setDevicesState(
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int headsetState, int prevHeadsetState, String headsetName) {
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synchronized (mLock) {
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int allHeadsets = SUPPORTED_HEADSETS;
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for (int curHeadset = 1; allHeadsets != 0; curHeadset <<= 1) {
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if ((curHeadset & allHeadsets) != 0) {
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setDeviceStateLocked(curHeadset, headsetState, prevHeadsetState, headsetName);
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allHeadsets &= ~curHeadset;
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}
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}
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}
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}
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private void setDeviceStateLocked(int headset,
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int headsetState, int prevHeadsetState, String headsetName) {
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if ((headsetState & headset) != (prevHeadsetState & headset)) {
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int outDevice = 0;
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int inDevice = 0;
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int state;
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if ((headsetState & headset) != 0) {
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state = 1;
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} else {
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state = 0;
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}
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if (headset == BIT_HEADSET) {
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outDevice = AudioManager.DEVICE_OUT_WIRED_HEADSET;
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inDevice = AudioManager.DEVICE_IN_WIRED_HEADSET;
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} else if (headset == BIT_HEADSET_NO_MIC) {
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outDevice = AudioManager.DEVICE_OUT_WIRED_HEADPHONE;
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} else if (headset == BIT_LINEOUT) {
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outDevice = AudioManager.DEVICE_OUT_LINE;
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} else if (headset == BIT_USB_HEADSET_ANLG) {
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outDevice = AudioManager.DEVICE_OUT_ANLG_DOCK_HEADSET;
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} else if (headset == BIT_USB_HEADSET_DGTL) {
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outDevice = AudioManager.DEVICE_OUT_DGTL_DOCK_HEADSET;
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} else if (headset == BIT_HDMI_AUDIO) {
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outDevice = AudioManager.DEVICE_OUT_HDMI;
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} else {
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Slog.e(TAG, "setDeviceState() invalid headset type: " + headset);
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return;
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}
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if (LOG) {
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Slog.v(TAG, "headsetName: " + headsetName +
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(state == 1 ? " connected" : " disconnected"));
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}
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if (outDevice != 0) {
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mAudioManager.setWiredDeviceConnectionState(outDevice, state, "", headsetName);
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}
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if (inDevice != 0) {
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mAudioManager.setWiredDeviceConnectionState(inDevice, state, "", headsetName);
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}
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}
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}
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private String switchCodeToString(int switchValues, int switchMask) {
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StringBuffer sb = new StringBuffer();
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if ((switchMask & SW_HEADPHONE_INSERT_BIT) != 0 &&
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(switchValues & SW_HEADPHONE_INSERT_BIT) != 0) {
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sb.append("SW_HEADPHONE_INSERT ");
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}
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if ((switchMask & SW_MICROPHONE_INSERT_BIT) != 0 &&
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(switchValues & SW_MICROPHONE_INSERT_BIT) != 0) {
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sb.append("SW_MICROPHONE_INSERT");
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}
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return sb.toString();
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}
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class WiredAccessoryObserver extends UEventObserver {
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private final List<UEventInfo> mUEventInfo;
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public WiredAccessoryObserver() {
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mUEventInfo = makeObservedUEventList();
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}
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void init() {
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synchronized (mLock) {
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if (LOG) Slog.v(TAG, "init()");
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char[] buffer = new char[1024];
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for (int i = 0; i < mUEventInfo.size(); ++i) {
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UEventInfo uei = mUEventInfo.get(i);
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try {
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int curState;
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FileReader file = new FileReader(uei.getSwitchStatePath());
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int len = file.read(buffer, 0, 1024);
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file.close();
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curState = Integer.parseInt((new String(buffer, 0, len)).trim());
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if (curState > 0) {
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updateStateLocked(uei.getDevPath(), uei.getDevName(), curState);
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}
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} catch (FileNotFoundException e) {
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Slog.w(TAG, uei.getSwitchStatePath() +
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" not found while attempting to determine initial switch state");
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} catch (Exception e) {
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Slog.e(TAG, "Error while attempting to determine initial switch state for "
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+ uei.getDevName(), e);
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}
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}
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}
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// At any given time accessories could be inserted
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// one on the board, one on the dock and one on HDMI:
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// observe three UEVENTs
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for (int i = 0; i < mUEventInfo.size(); ++i) {
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UEventInfo uei = mUEventInfo.get(i);
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startObserving("DEVPATH=" + uei.getDevPath());
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}
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}
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private List<UEventInfo> makeObservedUEventList() {
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List<UEventInfo> retVal = new ArrayList<UEventInfo>();
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UEventInfo uei;
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if("homlet".equals(SystemProperties.get("ro.product.platform", "pad"))) {}
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else{
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// Monitor h2w
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if (!mUseDevInputEventForAudioJack) {
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uei = new UEventInfo(NAME_H2W, BIT_HEADSET, BIT_HEADSET_NO_MIC, BIT_LINEOUT);
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if (uei.checkSwitchExists()) {
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retVal.add(uei);
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} else {
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Slog.w(TAG, "This kernel does not have wired headset support");
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}
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}
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// Monitor USB
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uei = new UEventInfo(NAME_USB_AUDIO, BIT_USB_HEADSET_ANLG, BIT_USB_HEADSET_DGTL, 0);
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if (uei.checkSwitchExists()) {
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retVal.add(uei);
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} else {
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Slog.w(TAG, "This kernel does not have usb audio support");
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}
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// Monitor HDMI
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//
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// If the kernel has support for the "hdmi_audio" switch, use that. It will be
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// signalled only when the HDMI driver has a video mode configured, and the downstream
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// sink indicates support for audio in its EDID.
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//
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// If the kernel does not have an "hdmi_audio" switch, just fall back on the older
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// "hdmi" switch instead.
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uei = new UEventInfo(NAME_HDMI_AUDIO, BIT_HDMI_AUDIO, 0, 0);
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if (uei.checkSwitchExists()) {
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retVal.add(uei);
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} else {
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uei = new UEventInfo(NAME_HDMI, BIT_HDMI_AUDIO, 0, 0);
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if (uei.checkSwitchExists()) {
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retVal.add(uei);
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} else {
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Slog.w(TAG, "This kernel does not have HDMI audio support");
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}
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}
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}
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return retVal;
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}
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@Override
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public void onUEvent(UEventObserver.UEvent event) {
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if (LOG) Slog.v(TAG, "Headset UEVENT: " + event.toString());
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try {
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String devPath = event.get("DEVPATH");
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String name = event.get("SWITCH_NAME");
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int state = Integer.parseInt(event.get("SWITCH_STATE"));
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synchronized (mLock) {
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updateStateLocked(devPath, name, state);
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}
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} catch (NumberFormatException e) {
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Slog.e(TAG, "Could not parse switch state from event " + event);
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}
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}
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private void updateStateLocked(String devPath, String name, int state) {
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for (int i = 0; i < mUEventInfo.size(); ++i) {
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UEventInfo uei = mUEventInfo.get(i);
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if (devPath.equals(uei.getDevPath())) {
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updateLocked(name, uei.computeNewHeadsetState(mHeadsetState, state));
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return;
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}
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}
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}
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private final class UEventInfo {
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private final String mDevName;
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private final int mState1Bits;
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private final int mState2Bits;
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private final int mStateNbits;
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public UEventInfo(String devName, int state1Bits, int state2Bits, int stateNbits) {
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mDevName = devName;
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mState1Bits = state1Bits;
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mState2Bits = state2Bits;
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mStateNbits = stateNbits;
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}
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public String getDevName() {
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return mDevName;
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}
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public String getDevPath() {
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return String.format(Locale.US, "/devices/virtual/switch/%s", mDevName);
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}
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public String getSwitchStatePath() {
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return String.format(Locale.US, "/sys/class/switch/%s/state", mDevName);
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}
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public boolean checkSwitchExists() {
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File f = new File(getSwitchStatePath());
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return f.exists();
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}
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public int computeNewHeadsetState(int headsetState, int switchState) {
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int preserveMask = ~(mState1Bits | mState2Bits | mStateNbits);
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int setBits = ((switchState == 1) ? mState1Bits :
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((switchState == 2) ? mState2Bits :
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((switchState == mStateNbits) ? mStateNbits : 0)));
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return ((headsetState & preserveMask) | setBits);
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}
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}
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}
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private class WiredAccessoryExtconObserver extends ExtconStateObserver<Pair<Integer, Integer>> {
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private final List<ExtconInfo> mExtconInfos;
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WiredAccessoryExtconObserver() {
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mExtconInfos = ExtconInfo.getExtconInfos(null);
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}
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private void init() {
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for (ExtconInfo extconInfo : mExtconInfos) {
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Pair<Integer, Integer> state = null;
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try {
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state = parseStateFromFile(extconInfo);
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} catch (FileNotFoundException e) {
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Slog.w(TAG, extconInfo.getStatePath()
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+ " not found while attempting to determine initial state", e);
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} catch (IOException e) {
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Slog.e(
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TAG,
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"Error reading " + extconInfo.getStatePath()
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+ " while attempting to determine initial state",
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e);
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}
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if (state != null) {
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updateState(extconInfo, extconInfo.getName(), state);
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}
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if (LOG) Slog.d(TAG, "observing " + extconInfo.getName());
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startObserving(extconInfo);
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}
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}
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@Override
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public Pair<Integer, Integer> parseState(ExtconInfo extconInfo, String status) {
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if (LOG) Slog.v(TAG, "status " + status);
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int []maskAndState = {0,0};
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// extcon event state changes from kernel4.9
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// new state will be like STATE=MICROPHONE=1\nHEADPHONE=0
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updateBit(maskAndState, BIT_HEADSET_NO_MIC, status, "HEADPHONE") ;
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updateBit(maskAndState, BIT_HEADSET, status,"MICROPHONE") ;
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updateBit(maskAndState, BIT_HDMI_AUDIO, status,"HDMI") ;
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updateBit(maskAndState, BIT_LINEOUT, status,"LINE-OUT") ;
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if (LOG) Slog.v(TAG, "mask " + maskAndState[0] + " state " + maskAndState[1]);
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return Pair.create(maskAndState[0],maskAndState[1]);
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}
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@Override
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public void updateState(ExtconInfo extconInfo, String name,
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Pair<Integer, Integer> maskAndState) {
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synchronized (mLock) {
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int mask = maskAndState.first;
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int state = maskAndState.second;
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if(name.equals("hdmi"))
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{
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updateLocked(name, mHeadsetState & ~(BIT_HDMI_AUDIO) | state);
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return;
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}
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updateLocked(name, mHeadsetState | (mask & state) & ~(mask & ~state));
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return;
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}
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}
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}
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/**
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* Updates the mask bit at {@code position} to 1 and the state bit at {@code position} to true
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* if {@code name=1} or false if {}@code name=0} is contained in {@code state}.
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*/
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private static void updateBit(int[] maskAndState, int position, String state, String name) {
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maskAndState[0] |= position;
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if (state.contains(name + "=1")) {
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maskAndState[0] |= position;
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maskAndState[1] |= position;
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} else if (state.contains(name + "=0")) {
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maskAndState[0] |= position;
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maskAndState[1] &= ~position;
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}
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}
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}
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