| /* |
| * 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.FileReader; |
| import java.io.FileNotFoundException; |
| |
| /** |
| * <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 MAX_AUDIO_PORTS = 3; /* h2w, USB Audio & hdmi */ |
| private static final String uEventInfo[][] = { {"DEVPATH=/devices/virtual/switch/h2w", |
| "/sys/class/switch/h2w/state", |
| "/sys/class/switch/h2w/name"}, |
| {"DEVPATH=/devices/virtual/switch/usb_audio", |
| "/sys/class/switch/usb_audio/state", |
| "/sys/class/switch/usb_audio/name"}, |
| {"DEVPATH=/devices/virtual/switch/hdmi", |
| "/sys/class/switch/hdmi/state", |
| "/sys/class/switch/hdmi/name"} }; |
| |
| 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 int mHeadsetState; |
| private int mPrevHeadsetState; |
| private String mHeadsetName; |
| private int switchState; |
| |
| 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 < MAX_AUDIO_PORTS; i++) { |
| startObserving(uEventInfo[i][0]); |
| } |
| } |
| } |
| |
| @Override |
| public void onUEvent(UEventObserver.UEvent event) { |
| if (LOG) Slog.v(TAG, "Headset UEVENT: " + event.toString()); |
| |
| try { |
| String name = event.get("SWITCH_NAME"); |
| int state = Integer.parseInt(event.get("SWITCH_STATE")); |
| updateState(name, state); |
| } catch (NumberFormatException e) { |
| Slog.e(TAG, "Could not parse switch state from event " + event); |
| } |
| } |
| |
| private synchronized final void updateState(String name, int state) |
| { |
| if (name.equals("usb_audio")) { |
| switchState = ((mHeadsetState & (BIT_HEADSET|BIT_HEADSET_NO_MIC|BIT_HDMI_AUDIO)) | |
| ((state == 1) ? BIT_USB_HEADSET_ANLG : |
| ((state == 2) ? BIT_USB_HEADSET_DGTL : 0))); |
| } else if (name.equals("hdmi")) { |
| switchState = ((mHeadsetState & (BIT_HEADSET|BIT_HEADSET_NO_MIC| |
| BIT_USB_HEADSET_DGTL|BIT_USB_HEADSET_ANLG)) | |
| ((state == 1) ? BIT_HDMI_AUDIO : 0)); |
| } else { |
| switchState = ((mHeadsetState & (BIT_HDMI_AUDIO|BIT_USB_HEADSET_ANLG| |
| BIT_USB_HEADSET_DGTL)) | |
| ((state == 1) ? BIT_HEADSET : |
| ((state == 2) ? BIT_HEADSET_NO_MIC : 0))); |
| } |
| update(name, switchState); |
| } |
| |
| private synchronized final void init() { |
| char[] buffer = new char[1024]; |
| |
| String newName = mHeadsetName; |
| int newState = mHeadsetState; |
| mPrevHeadsetState = mHeadsetState; |
| |
| if (LOG) Slog.v(TAG, "init()"); |
| |
| for (int i = 0; i < MAX_AUDIO_PORTS; i++) { |
| try { |
| FileReader file = new FileReader(uEventInfo[i][1]); |
| int len = file.read(buffer, 0, 1024); |
| file.close(); |
| newState = Integer.valueOf((new String(buffer, 0, len)).trim()); |
| |
| file = new FileReader(uEventInfo[i][2]); |
| len = file.read(buffer, 0, 1024); |
| file.close(); |
| newName = new String(buffer, 0, len).trim(); |
| |
| if (newState > 0) { |
| updateState(newName, newState); |
| } |
| |
| } catch (FileNotFoundException e) { |
| Slog.w(TAG, "This kernel does not have wired headset support"); |
| } 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) { |
| 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_USB_ANLG_HEADSET_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_USB_DGTL_HEADSET_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(); |
| } |
| }; |
| } |