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am 892f371c: Merge "Encapsulate locks in UEventObservers." into jb-mr1-dev

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* commit '892f371c6b8c33268dceaeb89ac09c73ad72ad79':
  Encapsulate locks in UEventObservers.
This commit is contained in:
Jeff Brown
2012-08-20 20:28:30 -07:00
committed by Android Git Automerger
parent 6fee1cba4f 892f371c6b
commit bdc2f66d5b
3 changed files with 443 additions and 405 deletions
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200
core/java/android/os/UEventObserver.java
View File

@@ -37,14 +37,79 @@ import java.util.HashMap;
* @hide
*/
public abstract class UEventObserver {
private static final String TAG = UEventObserver.class.getSimpleName();
private static UEventThread sThread;
private static native void native_setup();
private static native int next_event(byte[] buffer);
public UEventObserver() {
}
protected void finalize() throws Throwable {
try {
stopObserving();
} finally {
super.finalize();
}
}
private static UEventThread getThread() {
synchronized (UEventObserver.class) {
if (sThread == null) {
sThread = new UEventThread();
sThread.start();
}
return sThread;
}
}
private static UEventThread peekThread() {
synchronized (UEventObserver.class) {
return sThread;
}
}
/**
* Begin observation of UEvent's.<p>
* This method will cause the UEvent thread to start if this is the first
* invocation of startObserving in this process.<p>
* Once called, the UEvent thread will call onUEvent() when an incoming
* UEvent matches the specified string.<p>
* This method can be called multiple times to register multiple matches.
* Only one call to stopObserving is required even with multiple registered
* matches.
* @param match A substring of the UEvent to match. Use "" to match all
* UEvent's
*/
public final void startObserving(String match) {
final UEventThread t = getThread();
t.addObserver(match, this);
}
/**
* End observation of UEvent's.<p>
* This process's UEvent thread will never call onUEvent() on this
* UEventObserver after this call. Repeated calls have no effect.
*/
public final void stopObserving() {
final UEventThread t = getThread();
if (t != null) {
t.removeObserver(this);
}
}
/**
* Subclasses of UEventObserver should override this method to handle
* UEvents.
*/
public abstract void onUEvent(UEvent event);
/**
* Representation of a UEvent.
*/
static public class UEvent {
public static final class UEvent {
// collection of key=value pairs parsed from the uevent message
public HashMap<String,String> mMap = new HashMap<String,String>();
private final HashMap<String,String> mMap = new HashMap<String,String>();
public UEvent(String message) {
int offset = 0;
@@ -79,20 +144,20 @@ public abstract class UEventObserver {
}
}
private static UEventThread sThread;
private static boolean sThreadStarted = false;
private static class UEventThread extends Thread {
private static final class UEventThread extends Thread {
/** Many to many mapping of string match to observer.
* Multimap would be better, but not available in android, so use
* an ArrayList where even elements are the String match and odd
* elements the corresponding UEventObserver observer */
private ArrayList<Object> mObservers = new ArrayList<Object>();
UEventThread() {
private final ArrayList<Object> mKeysAndObservers = new ArrayList<Object>();
private final ArrayList<UEventObserver> mTempObserversToSignal =
new ArrayList<UEventObserver>();
public UEventThread() {
super("UEventObserver");
}
public void run() {
native_setup();
@@ -101,91 +166,54 @@ public abstract class UEventObserver {
while (true) {
len = next_event(buffer);
if (len > 0) {
String bufferStr = new String(buffer, 0, len); // easier to search a String
synchronized (mObservers) {
for (int i = 0; i < mObservers.size(); i += 2) {
if (bufferStr.indexOf((String)mObservers.get(i)) != -1) {
((UEventObserver)mObservers.get(i+1))
.onUEvent(new UEvent(bufferStr));
}
}
}
sendEvent(new String(buffer, 0, len));
}
}
}
public void addObserver(String match, UEventObserver observer) {
synchronized(mObservers) {
mObservers.add(match);
mObservers.add(observer);
private void sendEvent(String message) {
synchronized (mKeysAndObservers) {
final int N = mKeysAndObservers.size();
for (int i = 0; i < N; i += 2) {
final String key = (String)mKeysAndObservers.get(i);
if (message.indexOf(key) != -1) {
final UEventObserver observer =
(UEventObserver)mKeysAndObservers.get(i + 1);
mTempObserversToSignal.add(observer);
}
}
}
if (!mTempObserversToSignal.isEmpty()) {
final UEvent event = new UEvent(message);
final int N = mTempObserversToSignal.size();
for (int i = 0; i < N; i++) {
final UEventObserver observer = mTempObserversToSignal.get(i);
observer.onUEvent(event);
}
mTempObserversToSignal.clear();
}
}
public void addObserver(String match, UEventObserver observer) {
synchronized (mKeysAndObservers) {
mKeysAndObservers.add(match);
mKeysAndObservers.add(observer);
}
}
/** Removes every key/value pair where value=observer from mObservers */
public void removeObserver(UEventObserver observer) {
synchronized(mObservers) {
boolean found = true;
while (found) {
found = false;
for (int i = 0; i < mObservers.size(); i += 2) {
if (mObservers.get(i+1) == observer) {
mObservers.remove(i+1);
mObservers.remove(i);
found = true;
break;
}
synchronized (mKeysAndObservers) {
for (int i = 0; i < mKeysAndObservers.size(); ) {
if (mKeysAndObservers.get(i + 1) == observer) {
mKeysAndObservers.remove(i + 1);
mKeysAndObservers.remove(i);
} else {
i += 2;
}
}
}
}
}
private static native void native_setup();
private static native int next_event(byte[] buffer);
private static final synchronized void ensureThreadStarted() {
if (sThreadStarted == false) {
sThread = new UEventThread();
sThread.start();
sThreadStarted = true;
}
}
/**
* Begin observation of UEvent's.<p>
* This method will cause the UEvent thread to start if this is the first
* invocation of startObserving in this process.<p>
* Once called, the UEvent thread will call onUEvent() when an incoming
* UEvent matches the specified string.<p>
* This method can be called multiple times to register multiple matches.
* Only one call to stopObserving is required even with multiple registered
* matches.
* @param match A substring of the UEvent to match. Use "" to match all
* UEvent's
*/
public final synchronized void startObserving(String match) {
ensureThreadStarted();
sThread.addObserver(match, this);
}
/**
* End observation of UEvent's.<p>
* This process's UEvent thread will never call onUEvent() on this
* UEventObserver after this call. Repeated calls have no effect.
*/
public final synchronized void stopObserving() {
sThread.removeObserver(this);
}
/**
* Subclasses of UEventObserver should override this method to handle
* UEvents.
*/
public abstract void onUEvent(UEvent event);
protected void finalize() throws Throwable {
try {
stopObserving();
} finally {
super.finalize();
}
}
}

239
services/java/com/android/server/DockObserver.java
View File

@@ -18,10 +18,6 @@ package com.android.server;
import static android.provider.Settings.Secure.SCREENSAVER_ACTIVATE_ON_DOCK;
import com.android.server.power.PowerManagerService;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
@@ -30,6 +26,7 @@ import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.os.RemoteException;
import android.os.ServiceManager;
@@ -47,7 +44,7 @@ import java.io.FileReader;
/**
* <p>DockObserver monitors for a docking station.
*/
class DockObserver extends UEventObserver {
final class DockObserver extends UEventObserver {
private static final String TAG = DockObserver.class.getSimpleName();
private static final boolean LOG = false;
@@ -56,7 +53,9 @@ class DockObserver extends UEventObserver {
private static final int DEFAULT_DOCK = 1;
private static final int MSG_DOCK_STATE = 0;
private static final int MSG_DOCK_STATE_CHANGED = 0;
private final Object mLock = new Object();
private int mDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
private int mPreviousDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
@@ -78,7 +77,7 @@ class DockObserver extends UEventObserver {
Slog.v(TAG, "Dock UEVENT: " + event.toString());
}
synchronized (this) {
synchronized (mLock) {
try {
int newState = Integer.parseInt(event.get("SWITCH_STATE"));
if (newState != mDockState) {
@@ -96,7 +95,7 @@ class DockObserver extends UEventObserver {
(PowerManager)mContext.getSystemService(Context.POWER_SERVICE);
pm.wakeUp(SystemClock.uptimeMillis());
}
update();
updateLocked();
}
}
} catch (NumberFormatException e) {
@@ -105,132 +104,142 @@ class DockObserver extends UEventObserver {
}
}
private final void init() {
char[] buffer = new char[1024];
try {
FileReader file = new FileReader(DOCK_STATE_PATH);
int len = file.read(buffer, 0, 1024);
file.close();
mPreviousDockState = mDockState = Integer.valueOf((new String(buffer, 0, len)).trim());
} catch (FileNotFoundException e) {
Slog.w(TAG, "This kernel does not have dock station support");
} catch (Exception e) {
Slog.e(TAG, "" , e);
private void init() {
synchronized (mLock) {
try {
char[] buffer = new char[1024];
FileReader file = new FileReader(DOCK_STATE_PATH);
try {
int len = file.read(buffer, 0, 1024);
mDockState = Integer.valueOf((new String(buffer, 0, len)).trim());
mPreviousDockState = mDockState;
} finally {
file.close();
}
} catch (FileNotFoundException e) {
Slog.w(TAG, "This kernel does not have dock station support");
} catch (Exception e) {
Slog.e(TAG, "" , e);
}
}
}
void systemReady() {
synchronized (this) {
synchronized (mLock) {
// don't bother broadcasting undocked here
if (mDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED) {
update();
updateLocked();
}
mSystemReady = true;
}
}
private final void update() {
mHandler.sendEmptyMessage(MSG_DOCK_STATE);
private void updateLocked() {
mHandler.sendEmptyMessage(MSG_DOCK_STATE_CHANGED);
}
private void handleDockStateChange() {
synchronized (mLock) {
Slog.i(TAG, "Dock state changed: " + mDockState);
final ContentResolver cr = mContext.getContentResolver();
if (Settings.Secure.getInt(cr,
Settings.Secure.DEVICE_PROVISIONED, 0) == 0) {
Slog.i(TAG, "Device not provisioned, skipping dock broadcast");
return;
}
// Pack up the values and broadcast them to everyone
Intent intent = new Intent(Intent.ACTION_DOCK_EVENT);
intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
intent.putExtra(Intent.EXTRA_DOCK_STATE, mDockState);
// Check if this is Bluetooth Dock
// TODO(BT): Get Dock address.
// String address = null;
// if (address != null) {
// intent.putExtra(BluetoothDevice.EXTRA_DEVICE,
// BluetoothAdapter.getDefaultAdapter().getRemoteDevice(address));
// }
// User feedback to confirm dock connection. Particularly
// useful for flaky contact pins...
if (Settings.System.getInt(cr,
Settings.System.DOCK_SOUNDS_ENABLED, 1) == 1) {
String whichSound = null;
if (mDockState == Intent.EXTRA_DOCK_STATE_UNDOCKED) {
if ((mPreviousDockState == Intent.EXTRA_DOCK_STATE_DESK) ||
(mPreviousDockState == Intent.EXTRA_DOCK_STATE_LE_DESK) ||
(mPreviousDockState == Intent.EXTRA_DOCK_STATE_HE_DESK)) {
whichSound = Settings.System.DESK_UNDOCK_SOUND;
} else if (mPreviousDockState == Intent.EXTRA_DOCK_STATE_CAR) {
whichSound = Settings.System.CAR_UNDOCK_SOUND;
}
} else {
if ((mDockState == Intent.EXTRA_DOCK_STATE_DESK) ||
(mDockState == Intent.EXTRA_DOCK_STATE_LE_DESK) ||
(mDockState == Intent.EXTRA_DOCK_STATE_HE_DESK)) {
whichSound = Settings.System.DESK_DOCK_SOUND;
} else if (mDockState == Intent.EXTRA_DOCK_STATE_CAR) {
whichSound = Settings.System.CAR_DOCK_SOUND;
}
}
if (whichSound != null) {
final String soundPath = Settings.System.getString(cr, whichSound);
if (soundPath != null) {
final Uri soundUri = Uri.parse("file://" + soundPath);
if (soundUri != null) {
final Ringtone sfx = RingtoneManager.getRingtone(mContext, soundUri);
if (sfx != null) {
sfx.setStreamType(AudioManager.STREAM_SYSTEM);
sfx.play();
}
}
}
}
}
IDreamManager mgr = IDreamManager.Stub.asInterface(ServiceManager.getService("dreams"));
if (mgr != null) {
// dreams feature enabled
boolean undocked = mDockState == Intent.EXTRA_DOCK_STATE_UNDOCKED;
if (undocked) {
try {
if (mgr.isDreaming()) {
mgr.awaken();
}
} catch (RemoteException e) {
Slog.w(TAG, "Unable to awaken!", e);
}
} else {
if (isScreenSaverActivatedOnDock(mContext)) {
try {
mgr.dream();
} catch (RemoteException e) {
Slog.w(TAG, "Unable to dream!", e);
}
}
}
} else {
// dreams feature not enabled, send legacy intent
mContext.sendStickyBroadcast(intent);
}
}
}
private static boolean isScreenSaverActivatedOnDock(Context context) {
return 0 != Settings.Secure.getInt(
context.getContentResolver(), SCREENSAVER_ACTIVATE_ON_DOCK, DEFAULT_DOCK);
return Settings.Secure.getInt(context.getContentResolver(),
SCREENSAVER_ACTIVATE_ON_DOCK, DEFAULT_DOCK) != 0;
}
private final Handler mHandler = new Handler() {
private final Handler mHandler = new Handler(Looper.myLooper(), null, true) {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_DOCK_STATE:
synchronized (this) {
Slog.i(TAG, "Dock state changed: " + mDockState);
final ContentResolver cr = mContext.getContentResolver();
if (Settings.Secure.getInt(cr,
Settings.Secure.DEVICE_PROVISIONED, 0) == 0) {
Slog.i(TAG, "Device not provisioned, skipping dock broadcast");
return;
}
// Pack up the values and broadcast them to everyone
Intent intent = new Intent(Intent.ACTION_DOCK_EVENT);
intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
intent.putExtra(Intent.EXTRA_DOCK_STATE, mDockState);
// Check if this is Bluetooth Dock
// TODO(BT): Get Dock address.
String address = null;
if (address != null)
intent.putExtra(BluetoothDevice.EXTRA_DEVICE,
BluetoothAdapter.getDefaultAdapter().getRemoteDevice(address));
// User feedback to confirm dock connection. Particularly
// useful for flaky contact pins...
if (Settings.System.getInt(cr,
Settings.System.DOCK_SOUNDS_ENABLED, 1) == 1)
{
String whichSound = null;
if (mDockState == Intent.EXTRA_DOCK_STATE_UNDOCKED) {
if ((mPreviousDockState == Intent.EXTRA_DOCK_STATE_DESK) ||
(mPreviousDockState == Intent.EXTRA_DOCK_STATE_LE_DESK) ||
(mPreviousDockState == Intent.EXTRA_DOCK_STATE_HE_DESK)) {
whichSound = Settings.System.DESK_UNDOCK_SOUND;
} else if (mPreviousDockState == Intent.EXTRA_DOCK_STATE_CAR) {
whichSound = Settings.System.CAR_UNDOCK_SOUND;
}
} else {
if ((mDockState == Intent.EXTRA_DOCK_STATE_DESK) ||
(mDockState == Intent.EXTRA_DOCK_STATE_LE_DESK) ||
(mDockState == Intent.EXTRA_DOCK_STATE_HE_DESK)) {
whichSound = Settings.System.DESK_DOCK_SOUND;
} else if (mDockState == Intent.EXTRA_DOCK_STATE_CAR) {
whichSound = Settings.System.CAR_DOCK_SOUND;
}
}
if (whichSound != null) {
final String soundPath = Settings.System.getString(cr, whichSound);
if (soundPath != null) {
final Uri soundUri = Uri.parse("file://" + soundPath);
if (soundUri != null) {
final Ringtone sfx = RingtoneManager.getRingtone(mContext, soundUri);
if (sfx != null) {
sfx.setStreamType(AudioManager.STREAM_SYSTEM);
sfx.play();
}
}
}
}
}
IDreamManager mgr = IDreamManager.Stub.asInterface(ServiceManager.getService("dreams"));
if (mgr != null) {
// dreams feature enabled
boolean undocked = mDockState == Intent.EXTRA_DOCK_STATE_UNDOCKED;
if (undocked) {
try {
if (mgr.isDreaming()) {
mgr.awaken();
}
} catch (RemoteException e) {
Slog.w(TAG, "Unable to awaken!", e);
}
} else {
if (isScreenSaverActivatedOnDock(mContext)) {
try {
mgr.dream();
} catch (RemoteException e) {
Slog.w(TAG, "Unable to dream!", e);
}
}
}
} else {
// dreams feature not enabled, send legacy intent
mContext.sendStickyBroadcast(intent);
}
}
case MSG_DOCK_STATE_CHANGED:
handleDockStateChange();
break;
}
}

409
services/java/com/android/server/WiredAccessoryObserver.java
View File

@@ -16,12 +16,12 @@
package com.android.server;
import android.app.ActivityManagerNative;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.os.PowerManager;
import android.os.PowerManager.WakeLock;
@@ -39,7 +39,7 @@ import java.util.List;
/**
* <p>WiredAccessoryObserver monitors for a wired headset on the main board or dock.
*/
class WiredAccessoryObserver extends UEventObserver {
final class WiredAccessoryObserver extends UEventObserver {
private static final String TAG = WiredAccessoryObserver.class.getSimpleName();
private static final boolean LOG = true;
private static final int BIT_HEADSET = (1 << 0);
@@ -50,40 +50,177 @@ class WiredAccessoryObserver extends UEventObserver {
private static final int SUPPORTED_HEADSETS = (BIT_HEADSET|BIT_HEADSET_NO_MIC|
BIT_USB_HEADSET_ANLG|BIT_USB_HEADSET_DGTL|
BIT_HDMI_AUDIO);
private static final int HEADSETS_WITH_MIC = BIT_HEADSET;
private static class UEventInfo {
private final String mDevName;
private final int mState1Bits;
private final int mState2Bits;
private final Object mLock = new Object();
public UEventInfo(String devName, int state1Bits, int state2Bits) {
mDevName = devName;
mState1Bits = state1Bits;
mState2Bits = state2Bits;
private final Context mContext;
private final WakeLock mWakeLock; // held while there is a pending route change
private final AudioManager mAudioManager;
private final List<UEventInfo> mUEventInfo;
private int mHeadsetState;
private int mPrevHeadsetState;
private String mHeadsetName;
public WiredAccessoryObserver(Context context) {
mContext = context;
PowerManager pm = (PowerManager)context.getSystemService(Context.POWER_SERVICE);
mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "WiredAccessoryObserver");
mWakeLock.setReferenceCounted(false);
mAudioManager = (AudioManager)context.getSystemService(Context.AUDIO_SERVICE);
mUEventInfo = makeObservedUEventList();
context.registerReceiver(new BootCompletedReceiver(),
new IntentFilter(Intent.ACTION_BOOT_COMPLETED), null, null);
}
@Override
public void onUEvent(UEventObserver.UEvent event) {
if (LOG) Slog.v(TAG, "Headset UEVENT: " + event.toString());
try {
String devPath = event.get("DEVPATH");
String name = event.get("SWITCH_NAME");
int state = Integer.parseInt(event.get("SWITCH_STATE"));
synchronized (mLock) {
updateStateLocked(devPath, name, state);
}
} catch (NumberFormatException e) {
Slog.e(TAG, "Could not parse switch state from event " + event);
}
}
private void bootCompleted() {
synchronized (mLock) {
char[] buffer = new char[1024];
mPrevHeadsetState = mHeadsetState;
if (LOG) Slog.v(TAG, "init()");
for (int i = 0; i < mUEventInfo.size(); ++i) {
UEventInfo uei = mUEventInfo.get(i);
try {
int curState;
FileReader file = new FileReader(uei.getSwitchStatePath());
int len = file.read(buffer, 0, 1024);
file.close();
curState = Integer.valueOf((new String(buffer, 0, len)).trim());
if (curState > 0) {
updateStateLocked(uei.getDevPath(), uei.getDevName(), curState);
}
} catch (FileNotFoundException e) {
Slog.w(TAG, uei.getSwitchStatePath() +
" not found while attempting to determine initial switch state");
} catch (Exception e) {
Slog.e(TAG, "" , e);
}
}
}
public String getDevName() { return mDevName; }
// At any given time accessories could be inserted
// one on the board, one on the dock and one on HDMI:
// observe three UEVENTs
for (int i = 0; i < mUEventInfo.size(); ++i) {
UEventInfo uei = mUEventInfo.get(i);
startObserving("DEVPATH="+uei.getDevPath());
}
}
public String getDevPath() {
return String.format("/devices/virtual/switch/%s", mDevName);
private void updateStateLocked(String devPath, String name, int state) {
for (int i = 0; i < mUEventInfo.size(); ++i) {
UEventInfo uei = mUEventInfo.get(i);
if (devPath.equals(uei.getDevPath())) {
updateLocked(name, uei.computeNewHeadsetState(mHeadsetState, state));
return;
}
}
}
private void updateLocked(String newName, int newState) {
// Retain only relevant bits
int headsetState = newState & SUPPORTED_HEADSETS;
int usb_headset_anlg = headsetState & BIT_USB_HEADSET_ANLG;
int usb_headset_dgtl = headsetState & BIT_USB_HEADSET_DGTL;
int h2w_headset = headsetState & (BIT_HEADSET | BIT_HEADSET_NO_MIC);
boolean h2wStateChange = true;
boolean usbStateChange = true;
// reject all suspect transitions: only accept state changes from:
// - a: 0 heaset to 1 headset
// - b: 1 headset to 0 headset
if (LOG) Slog.v(TAG, "newState = "+newState+", headsetState = "+headsetState+","
+ "mHeadsetState = "+mHeadsetState);
if (mHeadsetState == headsetState || ((h2w_headset & (h2w_headset - 1)) != 0)) {
Log.e(TAG, "unsetting h2w flag");
h2wStateChange = false;
}
// - c: 0 usb headset to 1 usb headset
// - d: 1 usb headset to 0 usb headset
if ((usb_headset_anlg >> 2) == 1 && (usb_headset_dgtl >> 3) == 1) {
Log.e(TAG, "unsetting usb flag");
usbStateChange = false;
}
if (!h2wStateChange && !usbStateChange) {
Log.e(TAG, "invalid transition, returning ...");
return;
}
public String getSwitchStatePath() {
return String.format("/sys/class/switch/%s/state", mDevName);
mHeadsetName = newName;
mPrevHeadsetState = mHeadsetState;
mHeadsetState = headsetState;
mWakeLock.acquire();
Message msg = mHandler.obtainMessage(0, mHeadsetState, mPrevHeadsetState, mHeadsetName);
mHandler.sendMessage(msg);
}
private void setDevicesState(
int headsetState, int prevHeadsetState, String headsetName) {
synchronized (mLock) {
int allHeadsets = SUPPORTED_HEADSETS;
for (int curHeadset = 1; allHeadsets != 0; curHeadset <<= 1) {
if ((curHeadset & allHeadsets) != 0) {
setDeviceStateLocked(curHeadset, headsetState, prevHeadsetState, headsetName);
allHeadsets &= ~curHeadset;
}
}
}
}
public boolean checkSwitchExists() {
File f = new File(getSwitchStatePath());
return ((null != f) && f.exists());
}
private void setDeviceStateLocked(int headset,
int headsetState, int prevHeadsetState, String headsetName) {
if ((headsetState & headset) != (prevHeadsetState & headset)) {
int device;
int state;
public int computeNewHeadsetState(int headsetState, int switchState) {
int preserveMask = ~(mState1Bits | mState2Bits);
int setBits = ((switchState == 1) ? mState1Bits :
((switchState == 2) ? mState2Bits : 0));
if ((headsetState & headset) != 0) {
state = 1;
} else {
state = 0;
}
return ((headsetState & preserveMask) | setBits);
if (headset == BIT_HEADSET) {
device = AudioManager.DEVICE_OUT_WIRED_HEADSET;
} else if (headset == BIT_HEADSET_NO_MIC){
device = AudioManager.DEVICE_OUT_WIRED_HEADPHONE;
} else if (headset == BIT_USB_HEADSET_ANLG) {
device = AudioManager.DEVICE_OUT_ANLG_DOCK_HEADSET;
} else if (headset == BIT_USB_HEADSET_DGTL) {
device = AudioManager.DEVICE_OUT_DGTL_DOCK_HEADSET;
} else if (headset == BIT_HDMI_AUDIO) {
device = AudioManager.DEVICE_OUT_AUX_DIGITAL;
} else {
Slog.e(TAG, "setDeviceState() invalid headset type: "+headset);
return;
}
if (LOG)
Slog.v(TAG, "device "+headsetName+((state == 1) ? " connected" : " disconnected"));
mAudioManager.setWiredDeviceConnectionState(device, state, headsetName);
}
}
@@ -130,189 +267,53 @@ class WiredAccessoryObserver extends UEventObserver {
return retVal;
}
private static List<UEventInfo> uEventInfo = makeObservedUEventList();
private int mHeadsetState;
private int mPrevHeadsetState;
private String mHeadsetName;
private final Context mContext;
private final WakeLock mWakeLock; // held while there is a pending route change
private final AudioManager mAudioManager;
public WiredAccessoryObserver(Context context) {
mContext = context;
PowerManager pm = (PowerManager)context.getSystemService(Context.POWER_SERVICE);
mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "WiredAccessoryObserver");
mWakeLock.setReferenceCounted(false);
mAudioManager = (AudioManager)context.getSystemService(Context.AUDIO_SERVICE);
context.registerReceiver(new BootCompletedReceiver(),
new IntentFilter(Intent.ACTION_BOOT_COMPLETED), null, null);
}
private final class BootCompletedReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
// At any given time accessories could be inserted
// one on the board, one on the dock and one on HDMI:
// observe three UEVENTs
init(); // set initial status
for (int i = 0; i < uEventInfo.size(); ++i) {
UEventInfo uei = uEventInfo.get(i);
startObserving("DEVPATH="+uei.getDevPath());
}
}
}
@Override
public void onUEvent(UEventObserver.UEvent event) {
if (LOG) Slog.v(TAG, "Headset UEVENT: " + event.toString());
try {
String devPath = event.get("DEVPATH");
String name = event.get("SWITCH_NAME");
int state = Integer.parseInt(event.get("SWITCH_STATE"));
updateState(devPath, name, state);
} catch (NumberFormatException e) {
Slog.e(TAG, "Could not parse switch state from event " + event);
}
}
private synchronized final void updateState(String devPath, String name, int state)
{
for (int i = 0; i < uEventInfo.size(); ++i) {
UEventInfo uei = uEventInfo.get(i);
if (devPath.equals(uei.getDevPath())) {
update(name, uei.computeNewHeadsetState(mHeadsetState, state));
return;
}
}
}
private synchronized final void init() {
char[] buffer = new char[1024];
mPrevHeadsetState = mHeadsetState;
if (LOG) Slog.v(TAG, "init()");
for (int i = 0; i < uEventInfo.size(); ++i) {
UEventInfo uei = uEventInfo.get(i);
try {
int curState;
FileReader file = new FileReader(uei.getSwitchStatePath());
int len = file.read(buffer, 0, 1024);
file.close();
curState = Integer.valueOf((new String(buffer, 0, len)).trim());
if (curState > 0) {
updateState(uei.getDevPath(), uei.getDevName(), curState);
}
} catch (FileNotFoundException e) {
Slog.w(TAG, uei.getSwitchStatePath() +
" not found while attempting to determine initial switch state");
} catch (Exception e) {
Slog.e(TAG, "" , e);
}
}
}
private synchronized final void update(String newName, int newState) {
// Retain only relevant bits
int headsetState = newState & SUPPORTED_HEADSETS;
int newOrOld = headsetState | mHeadsetState;
int delay = 0;
int usb_headset_anlg = headsetState & BIT_USB_HEADSET_ANLG;
int usb_headset_dgtl = headsetState & BIT_USB_HEADSET_DGTL;
int h2w_headset = headsetState & (BIT_HEADSET | BIT_HEADSET_NO_MIC);
boolean h2wStateChange = true;
boolean usbStateChange = true;
// reject all suspect transitions: only accept state changes from:
// - a: 0 heaset to 1 headset
// - b: 1 headset to 0 headset
if (LOG) Slog.v(TAG, "newState = "+newState+", headsetState = "+headsetState+","
+ "mHeadsetState = "+mHeadsetState);
if (mHeadsetState == headsetState || ((h2w_headset & (h2w_headset - 1)) != 0)) {
Log.e(TAG, "unsetting h2w flag");
h2wStateChange = false;
}
// - c: 0 usb headset to 1 usb headset
// - d: 1 usb headset to 0 usb headset
if ((usb_headset_anlg >> 2) == 1 && (usb_headset_dgtl >> 3) == 1) {
Log.e(TAG, "unsetting usb flag");
usbStateChange = false;
}
if (!h2wStateChange && !usbStateChange) {
Log.e(TAG, "invalid transition, returning ...");
return;
}
mHeadsetName = newName;
mPrevHeadsetState = mHeadsetState;
mHeadsetState = headsetState;
mWakeLock.acquire();
mHandler.sendMessage(mHandler.obtainMessage(0,
mHeadsetState,
mPrevHeadsetState,
mHeadsetName));
}
private synchronized final void setDevicesState(int headsetState,
int prevHeadsetState,
String headsetName) {
int allHeadsets = SUPPORTED_HEADSETS;
for (int curHeadset = 1; allHeadsets != 0; curHeadset <<= 1) {
if ((curHeadset & allHeadsets) != 0) {
setDeviceState(curHeadset, headsetState, prevHeadsetState, headsetName);
allHeadsets &= ~curHeadset;
}
}
}
private final void setDeviceState(int headset,
int headsetState,
int prevHeadsetState,
String headsetName) {
if ((headsetState & headset) != (prevHeadsetState & headset)) {
int device;
int state;
if ((headsetState & headset) != 0) {
state = 1;
} else {
state = 0;
}
if (headset == BIT_HEADSET) {
device = AudioManager.DEVICE_OUT_WIRED_HEADSET;
} else if (headset == BIT_HEADSET_NO_MIC){
device = AudioManager.DEVICE_OUT_WIRED_HEADPHONE;
} else if (headset == BIT_USB_HEADSET_ANLG) {
device = AudioManager.DEVICE_OUT_ANLG_DOCK_HEADSET;
} else if (headset == BIT_USB_HEADSET_DGTL) {
device = AudioManager.DEVICE_OUT_DGTL_DOCK_HEADSET;
} else if (headset == BIT_HDMI_AUDIO) {
device = AudioManager.DEVICE_OUT_AUX_DIGITAL;
} else {
Slog.e(TAG, "setDeviceState() invalid headset type: "+headset);
return;
}
if (LOG)
Slog.v(TAG, "device "+headsetName+((state == 1) ? " connected" : " disconnected"));
mAudioManager.setWiredDeviceConnectionState(device, state, headsetName);
}
}
private final Handler mHandler = new Handler() {
private final Handler mHandler = new Handler(Looper.myLooper(), null, true) {
@Override
public void handleMessage(Message msg) {
setDevicesState(msg.arg1, msg.arg2, (String)msg.obj);
mWakeLock.release();
}
};
private static final class UEventInfo {
private final String mDevName;
private final int mState1Bits;
private final int mState2Bits;
public UEventInfo(String devName, int state1Bits, int state2Bits) {
mDevName = devName;
mState1Bits = state1Bits;
mState2Bits = state2Bits;
}
public String getDevName() { return mDevName; }
public String getDevPath() {
return String.format("/devices/virtual/switch/%s", mDevName);
}
public String getSwitchStatePath() {
return String.format("/sys/class/switch/%s/state", mDevName);
}
public boolean checkSwitchExists() {
File f = new File(getSwitchStatePath());
return ((null != f) && f.exists());
}
public int computeNewHeadsetState(int headsetState, int switchState) {
int preserveMask = ~(mState1Bits | mState2Bits);
int setBits = ((switchState == 1) ? mState1Bits :
((switchState == 2) ? mState2Bits : 0));
return ((headsetState & preserveMask) | setBits);
}
}
private final class BootCompletedReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
bootCompleted();
}
}
}