| /* |
| * Copyright (C) 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. |
| * 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.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.Message; |
| import android.os.PowerManager; |
| import android.os.PowerManager.WakeLock; |
| import android.os.UEventObserver; |
| import android.util.Slog; |
| import android.media.AudioManager; |
| import android.util.Log; |
| |
| import java.io.File; |
| import java.io.FileReader; |
| import java.io.FileNotFoundException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * <p>WiredAccessoryObserver monitors for a wired headset on the main board or dock. |
| */ |
| 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); |
| private static final int BIT_HEADSET_NO_MIC = (1 << 1); |
| private static final int BIT_USB_HEADSET_ANLG = (1 << 2); |
| private static final int BIT_USB_HEADSET_DGTL = (1 << 3); |
| private static final int BIT_HDMI_AUDIO = (1 << 4); |
| 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; |
| |
| 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 static List<UEventInfo> makeObservedUEventList() { |
| List<UEventInfo> retVal = new ArrayList<UEventInfo>(); |
| UEventInfo uei; |
| |
| // Monitor h2w |
| uei = new UEventInfo("h2w", BIT_HEADSET, BIT_HEADSET_NO_MIC); |
| if (uei.checkSwitchExists()) { |
| retVal.add(uei); |
| } else { |
| Slog.w(TAG, "This kernel does not have wired headset support"); |
| } |
| |
| // Monitor USB |
| uei = new UEventInfo("usb_audio", BIT_USB_HEADSET_ANLG, BIT_USB_HEADSET_DGTL); |
| if (uei.checkSwitchExists()) { |
| retVal.add(uei); |
| } else { |
| Slog.w(TAG, "This kernel does not have usb audio support"); |
| } |
| |
| // Monitor HDMI |
| // |
| // If the kernel has support for the "hdmi_audio" switch, use that. It will be signalled |
| // only when the HDMI driver has a video mode configured, and the downstream sink indicates |
| // support for audio in its EDID. |
| // |
| // If the kernel does not have an "hdmi_audio" switch, just fall back on the older "hdmi" |
| // switch instead. |
| uei = new UEventInfo("hdmi_audio", BIT_HDMI_AUDIO, 0); |
| if (uei.checkSwitchExists()) { |
| retVal.add(uei); |
| } else { |
| uei = new UEventInfo("hdmi", BIT_HDMI_AUDIO, 0); |
| if (uei.checkSwitchExists()) { |
| retVal.add(uei); |
| } else { |
| Slog.w(TAG, "This kernel does not have HDMI audio support"); |
| } |
| } |
| |
| 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 |
| |
| 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); |
| |
| 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; |
| |
| if (headsetState == 0) { |
| if (mContext.getResources().getBoolean( |
| com.android.internal.R.bool.config_sendAudioBecomingNoisy)) { |
| Intent intent = new Intent(AudioManager.ACTION_AUDIO_BECOMING_NOISY); |
| mContext.sendBroadcast(intent); |
| } |
| |
| // It can take hundreds of ms flush the audio pipeline after |
| // apps pause audio playback, but audio route changes are |
| // immediate, so delay the route change by 1000ms. |
| // This could be improved once the audio sub-system provides an |
| // interface to clear the audio pipeline. |
| delay = 1000; |
| } else { |
| // Insert the same delay for headset connection so that the connection event is not |
| // broadcast before the disconnection event in case of fast removal/insertion |
| if (mHandler.hasMessages(0)) { |
| delay = 1000; |
| } |
| } |
| mWakeLock.acquire(); |
| mHandler.sendMessageDelayed(mHandler.obtainMessage(0, |
| mHeadsetState, |
| mPrevHeadsetState, |
| mHeadsetName), |
| delay); |
| } |
| |
| private synchronized final void sendIntents(int headsetState, int prevHeadsetState, String headsetName) { |
| int allHeadsets = SUPPORTED_HEADSETS; |
| for (int curHeadset = 1; allHeadsets != 0; curHeadset <<= 1) { |
| if ((curHeadset & allHeadsets) != 0) { |
| sendIntent(curHeadset, headsetState, prevHeadsetState, headsetName); |
| allHeadsets &= ~curHeadset; |
| } |
| } |
| } |
| |
| private final void sendIntent(int headset, int headsetState, int prevHeadsetState, String headsetName) { |
| if ((headsetState & headset) != (prevHeadsetState & headset)) { |
| |
| int state = 0; |
| if ((headsetState & headset) != 0) { |
| state = 1; |
| } |
| if((headset == BIT_USB_HEADSET_ANLG) || (headset == BIT_USB_HEADSET_DGTL) || |
| (headset == BIT_HDMI_AUDIO)) { |
| Intent intent; |
| |
| // Pack up the values and broadcast them to everyone |
| if (headset == BIT_USB_HEADSET_ANLG) { |
| intent = new Intent(Intent.ACTION_ANALOG_AUDIO_DOCK_PLUG); |
| intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); |
| intent.putExtra("state", state); |
| intent.putExtra("name", headsetName); |
| ActivityManagerNative.broadcastStickyIntent(intent, null); |
| } else if (headset == BIT_USB_HEADSET_DGTL) { |
| intent = new Intent(Intent.ACTION_DIGITAL_AUDIO_DOCK_PLUG); |
| intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); |
| intent.putExtra("state", state); |
| intent.putExtra("name", headsetName); |
| ActivityManagerNative.broadcastStickyIntent(intent, null); |
| } else if (headset == BIT_HDMI_AUDIO) { |
| intent = new Intent(Intent.ACTION_HDMI_AUDIO_PLUG); |
| intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); |
| intent.putExtra("state", state); |
| intent.putExtra("name", headsetName); |
| ActivityManagerNative.broadcastStickyIntent(intent, null); |
| } |
| |
| if (LOG) Slog.v(TAG, "Intent.ACTION_USB_HEADSET_PLUG: state: "+state+" name: "+headsetName); |
| // TODO: Should we require a permission? |
| } |
| if((headset == BIT_HEADSET) || (headset == BIT_HEADSET_NO_MIC)) { |
| |
| // Pack up the values and broadcast them to everyone |
| Intent intent = new Intent(Intent.ACTION_HEADSET_PLUG); |
| intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); |
| //int state = 0; |
| int microphone = 0; |
| |
| if ((headset & HEADSETS_WITH_MIC) != 0) { |
| microphone = 1; |
| } |
| |
| intent.putExtra("state", state); |
| intent.putExtra("name", headsetName); |
| intent.putExtra("microphone", microphone); |
| |
| if (LOG) Slog.v(TAG, "Intent.ACTION_HEADSET_PLUG: state: "+state+" name: "+headsetName+" mic: "+microphone); |
| // TODO: Should we require a permission? |
| ActivityManagerNative.broadcastStickyIntent(intent, null); |
| } |
| } |
| } |
| |
| private final Handler mHandler = new Handler() { |
| @Override |
| public void handleMessage(Message msg) { |
| sendIntents(msg.arg1, msg.arg2, (String)msg.obj); |
| mWakeLock.release(); |
| } |
| }; |
| } |