/*
* Copyright (C) 2012 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.display;
import com.android.internal.util.DumpUtils;
import android.content.BroadcastReceiver;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.ContentObserver;
import android.hardware.display.WifiDisplay;
import android.hardware.display.WifiDisplayStatus;
import android.media.AudioManager;
import android.media.RemoteDisplay;
import android.net.NetworkInfo;
import android.net.Uri;
import android.net.wifi.p2p.WifiP2pConfig;
import android.net.wifi.p2p.WifiP2pDevice;
import android.net.wifi.p2p.WifiP2pDeviceList;
import android.net.wifi.p2p.WifiP2pGroup;
import android.net.wifi.p2p.WifiP2pManager;
import android.net.wifi.p2p.WifiP2pWfdInfo;
import android.net.wifi.p2p.WifiP2pManager.ActionListener;
import android.net.wifi.p2p.WifiP2pManager.Channel;
import android.net.wifi.p2p.WifiP2pManager.GroupInfoListener;
import android.net.wifi.p2p.WifiP2pManager.PeerListListener;
import android.os.Handler;
import android.provider.Settings;
import android.util.Slog;
import android.view.Surface;
import java.io.PrintWriter;
import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.Enumeration;
import libcore.util.Objects;
/**
* Manages all of the various asynchronous interactions with the {@link WifiP2pManager}
* on behalf of {@link WifiDisplayAdapter}.
* <p>
* This code is isolated from {@link WifiDisplayAdapter} so that we can avoid
* accidentally introducing any deadlocks due to the display manager calling
* outside of itself while holding its lock. It's also way easier to write this
* asynchronous code if we can assume that it is single-threaded.
* </p><p>
* The controller must be instantiated on the handler thread.
* </p>
*/
final class WifiDisplayController implements DumpUtils.Dump {
private static final String TAG = "WifiDisplayController";
private static final boolean DEBUG = false;
private static final int DEFAULT_CONTROL_PORT = 7236;
private static final int MAX_THROUGHPUT = 50;
private static final int CONNECTION_TIMEOUT_SECONDS = 60;
private static final int RTSP_TIMEOUT_SECONDS = 15;
private static final int DISCOVER_PEERS_MAX_RETRIES = 10;
private static final int DISCOVER_PEERS_RETRY_DELAY_MILLIS = 500;
private static final int CONNECT_MAX_RETRIES = 3;
private static final int CONNECT_RETRY_DELAY_MILLIS = 500;
// A unique token to identify the remote submix that is managed by Wifi display.
// It must match what the media server uses when it starts recording the submix
// for transmission. We use 0 although the actual value is currently ignored.
private static final int REMOTE_SUBMIX_ADDRESS = 0;
private final Context mContext;
private final Handler mHandler;
private final Listener mListener;
private final WifiP2pManager mWifiP2pManager;
private final Channel mWifiP2pChannel;
private final AudioManager mAudioManager;
private boolean mWifiP2pEnabled;
private boolean mWfdEnabled;
private boolean mWfdEnabling;
private NetworkInfo mNetworkInfo;
private final ArrayList<WifiP2pDevice> mAvailableWifiDisplayPeers =
new ArrayList<WifiP2pDevice>();
// True if Wifi display is enabled by the user.
private boolean mWifiDisplayOnSetting;
// True if there is a call to discoverPeers in progress.
private boolean mDiscoverPeersInProgress;
// Number of discover peers retries remaining.
private int mDiscoverPeersRetriesLeft;
// The device to which we want to connect, or null if we want to be disconnected.
private WifiP2pDevice mDesiredDevice;
// The device to which we are currently connecting, or null if we have already connected
// or are not trying to connect.
private WifiP2pDevice mConnectingDevice;
// The device to which we are currently connected, which means we have an active P2P group.
private WifiP2pDevice mConnectedDevice;
// The group info obtained after connecting.
private WifiP2pGroup mConnectedDeviceGroupInfo;
// Number of connection retries remaining.
private int mConnectionRetriesLeft;
// The remote display that is listening on the connection.
// Created after the Wifi P2P network is connected.
private RemoteDisplay mRemoteDisplay;
// The remote display interface.
private String mRemoteDisplayInterface;
// True if RTSP has connected.
private boolean mRemoteDisplayConnected;
// True if the remote submix is enabled.
private boolean mRemoteSubmixOn;
// The information we have most recently told WifiDisplayAdapter about.
private WifiDisplay mAdvertisedDisplay;
private Surface mAdvertisedDisplaySurface;
private int mAdvertisedDisplayWidth;
private int mAdvertisedDisplayHeight;
private int mAdvertisedDisplayFlags;
public WifiDisplayController(Context context, Handler handler, Listener listener) {
mContext = context;
mHandler = handler;
mListener = listener;
mWifiP2pManager = (WifiP2pManager)context.getSystemService(Context.WIFI_P2P_SERVICE);
mWifiP2pChannel = mWifiP2pManager.initialize(context, handler.getLooper(), null);
mAudioManager = (AudioManager)context.getSystemService(Context.AUDIO_SERVICE);
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION);
intentFilter.addAction(WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION);
intentFilter.addAction(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION);
context.registerReceiver(mWifiP2pReceiver, intentFilter, null, mHandler);
ContentObserver settingsObserver = new ContentObserver(mHandler) {
@Override
public void onChange(boolean selfChange, Uri uri) {
updateSettings();
}
};
final ContentResolver resolver = mContext.getContentResolver();
resolver.registerContentObserver(Settings.Global.getUriFor(
Settings.Global.WIFI_DISPLAY_ON), false, settingsObserver);
updateSettings();
}
private void updateSettings() {
final ContentResolver resolver = mContext.getContentResolver();
mWifiDisplayOnSetting = Settings.Global.getInt(resolver,
Settings.Global.WIFI_DISPLAY_ON, 0) != 0;
updateWfdEnableState();
}
public void dump(PrintWriter pw) {
pw.println("mWifiDisplayOnSetting=" + mWifiDisplayOnSetting);
pw.println("mWifiP2pEnabled=" + mWifiP2pEnabled);
pw.println("mWfdEnabled=" + mWfdEnabled);
pw.println("mWfdEnabling=" + mWfdEnabling);
pw.println("mNetworkInfo=" + mNetworkInfo);
pw.println("mDiscoverPeersInProgress=" + mDiscoverPeersInProgress);
pw.println("mDiscoverPeersRetriesLeft=" + mDiscoverPeersRetriesLeft);
pw.println("mDesiredDevice=" + describeWifiP2pDevice(mDesiredDevice));
pw.println("mConnectingDisplay=" + describeWifiP2pDevice(mConnectingDevice));
pw.println("mConnectedDevice=" + describeWifiP2pDevice(mConnectedDevice));
pw.println("mConnectionRetriesLeft=" + mConnectionRetriesLeft);
pw.println("mRemoteDisplay=" + mRemoteDisplay);
pw.println("mRemoteDisplayInterface=" + mRemoteDisplayInterface);
pw.println("mRemoteDisplayConnected=" + mRemoteDisplayConnected);
pw.println("mRemoteSubmixOn=" + mRemoteSubmixOn);
pw.println("mAdvertisedDisplay=" + mAdvertisedDisplay);
pw.println("mAdvertisedDisplaySurface=" + mAdvertisedDisplaySurface);
pw.println("mAdvertisedDisplayWidth=" + mAdvertisedDisplayWidth);
pw.println("mAdvertisedDisplayHeight=" + mAdvertisedDisplayHeight);
pw.println("mAdvertisedDisplayFlags=" + mAdvertisedDisplayFlags);
pw.println("mAvailableWifiDisplayPeers: size=" + mAvailableWifiDisplayPeers.size());
for (WifiP2pDevice device : mAvailableWifiDisplayPeers) {
pw.println(" " + describeWifiP2pDevice(device));
}
}
public void requestScan() {
discoverPeers();
}
public void requestConnect(String address) {
for (WifiP2pDevice device : mAvailableWifiDisplayPeers) {
if (device.deviceAddress.equals(address)) {
connect(device);
}
}
}
public void requestDisconnect() {
disconnect();
}
private void updateWfdEnableState() {
if (mWifiDisplayOnSetting && mWifiP2pEnabled) {
// WFD should be enabled.
if (!mWfdEnabled && !mWfdEnabling) {
mWfdEnabling = true;
WifiP2pWfdInfo wfdInfo = new WifiP2pWfdInfo();
wfdInfo.setWfdEnabled(true);
wfdInfo.setDeviceType(WifiP2pWfdInfo.WFD_SOURCE);
wfdInfo.setSessionAvailable(true);
wfdInfo.setControlPort(DEFAULT_CONTROL_PORT);
wfdInfo.setMaxThroughput(MAX_THROUGHPUT);
mWifiP2pManager.setWFDInfo(mWifiP2pChannel, wfdInfo, new ActionListener() {
@Override
public void onSuccess() {
if (DEBUG) {
Slog.d(TAG, "Successfully set WFD info.");
}
if (mWfdEnabling) {
mWfdEnabling = false;
mWfdEnabled = true;
reportFeatureState();
}
}
@Override
public void onFailure(int reason) {
if (DEBUG) {
Slog.d(TAG, "Failed to set WFD info with reason " + reason + ".");
}
mWfdEnabling = false;
}
});
}
} else {
// WFD should be disabled.
mWfdEnabling = false;
mWfdEnabled = false;
reportFeatureState();
disconnect();
}
}
private void reportFeatureState() {
final int featureState = computeFeatureState();
mHandler.post(new Runnable() {
@Override
public void run() {
mListener.onFeatureStateChanged(featureState);
}
});
}
private int computeFeatureState() {
if (!mWifiP2pEnabled) {
return WifiDisplayStatus.FEATURE_STATE_DISABLED;
}
return mWifiDisplayOnSetting ? WifiDisplayStatus.FEATURE_STATE_ON :
WifiDisplayStatus.FEATURE_STATE_OFF;
}
private void discoverPeers() {
if (!mDiscoverPeersInProgress) {
mDiscoverPeersInProgress = true;
mDiscoverPeersRetriesLeft = DISCOVER_PEERS_MAX_RETRIES;
handleScanStarted();
tryDiscoverPeers();
}
}
private void tryDiscoverPeers() {
mWifiP2pManager.discoverPeers(mWifiP2pChannel, new ActionListener() {
@Override
public void onSuccess() {
if (DEBUG) {
Slog.d(TAG, "Discover peers succeeded. Requesting peers now.");
}
mDiscoverPeersInProgress = false;
requestPeers();
}
@Override
public void onFailure(int reason) {
if (DEBUG) {
Slog.d(TAG, "Discover peers failed with reason " + reason + ".");
}
if (mDiscoverPeersInProgress) {
if (reason == 0 && mDiscoverPeersRetriesLeft > 0 && mWfdEnabled) {
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
if (mDiscoverPeersInProgress) {
if (mDiscoverPeersRetriesLeft > 0 && mWfdEnabled) {
mDiscoverPeersRetriesLeft -= 1;
if (DEBUG) {
Slog.d(TAG, "Retrying discovery. Retries left: "
+ mDiscoverPeersRetriesLeft);
}
tryDiscoverPeers();
} else {
handleScanFinished();
mDiscoverPeersInProgress = false;
}
}
}
}, DISCOVER_PEERS_RETRY_DELAY_MILLIS);
} else {
handleScanFinished();
mDiscoverPeersInProgress = false;
}
}
}
});
}
private void requestPeers() {
mWifiP2pManager.requestPeers(mWifiP2pChannel, new PeerListListener() {
@Override
public void onPeersAvailable(WifiP2pDeviceList peers) {
if (DEBUG) {
Slog.d(TAG, "Received list of peers.");
}
mAvailableWifiDisplayPeers.clear();
for (WifiP2pDevice device : peers.getDeviceList()) {
if (DEBUG) {
Slog.d(TAG, " " + describeWifiP2pDevice(device));
}
if (isWifiDisplay(device)) {
mAvailableWifiDisplayPeers.add(device);
}
}
handleScanFinished();
}
});
}
private void handleScanStarted() {
mHandler.post(new Runnable() {
@Override
public void run() {
mListener.onScanStarted();
}
});
}
private void handleScanFinished() {
final int count = mAvailableWifiDisplayPeers.size();
final WifiDisplay[] displays = WifiDisplay.CREATOR.newArray(count);
for (int i = 0; i < count; i++) {
displays[i] = createWifiDisplay(mAvailableWifiDisplayPeers.get(i));
}
mHandler.post(new Runnable() {
@Override
public void run() {
mListener.onScanFinished(displays);
}
});
}
private void connect(final WifiP2pDevice device) {
if (mDesiredDevice != null
&& !mDesiredDevice.deviceAddress.equals(device.deviceAddress)) {
if (DEBUG) {
Slog.d(TAG, "connect: nothing to do, already connecting to "
+ describeWifiP2pDevice(device));
}
return;
}
if (mConnectedDevice != null
&& !mConnectedDevice.deviceAddress.equals(device.deviceAddress)
&& mDesiredDevice == null) {
if (DEBUG) {
Slog.d(TAG, "connect: nothing to do, already connected to "
+ describeWifiP2pDevice(device) + " and not part way through "
+ "connecting to a different device.");
}
return;
}
mDesiredDevice = device;
mConnectionRetriesLeft = CONNECT_MAX_RETRIES;
updateConnection();
}
private void disconnect() {
mDesiredDevice = null;
updateConnection();
}
private void retryConnection() {
// Cheap hack. Make a new instance of the device object so that we
// can distinguish it from the previous connection attempt.
// This will cause us to tear everything down before we try again.
mDesiredDevice = new WifiP2pDevice(mDesiredDevice);
updateConnection();
}
/**
* This function is called repeatedly after each asynchronous operation
* until all preconditions for the connection have been satisfied and the
* connection is established (or not).
*/
private void updateConnection() {
// Step 1. Before we try to connect to a new device, tell the system we
// have disconnected from the old one.
if (mRemoteDisplay != null && mConnectedDevice != mDesiredDevice) {
Slog.i(TAG, "Stopped listening for RTSP connection on " + mRemoteDisplayInterface
+ " from Wifi display: " + mConnectedDevice.deviceName);
mRemoteDisplay.dispose();
mRemoteDisplay = null;
mRemoteDisplayInterface = null;
mRemoteDisplayConnected = false;
mHandler.removeCallbacks(mRtspTimeout);
setRemoteSubmixOn(false);
unadvertiseDisplay();
// continue to next step
}
// Step 2. Before we try to connect to a new device, disconnect from the old one.
if (mConnectedDevice != null && mConnectedDevice != mDesiredDevice) {
Slog.i(TAG, "Disconnecting from Wifi display: " + mConnectedDevice.deviceName);
unadvertiseDisplay();
final WifiP2pDevice oldDevice = mConnectedDevice;
mWifiP2pManager.removeGroup(mWifiP2pChannel, new ActionListener() {
@Override
public void onSuccess() {
Slog.i(TAG, "Disconnected from Wifi display: " + oldDevice.deviceName);
next();
}
@Override
public void onFailure(int reason) {
Slog.i(TAG, "Failed to disconnect from Wifi display: "
+ oldDevice.deviceName + ", reason=" + reason);
next();
}
private void next() {
if (mConnectedDevice == oldDevice) {
mConnectedDevice = null;
updateConnection();
}
}
});
return; // wait for asynchronous callback
}
// Step 3. Before we try to connect to a new device, stop trying to connect
// to the old one.
if (mConnectingDevice != null && mConnectingDevice != mDesiredDevice) {
Slog.i(TAG, "Canceling connection to Wifi display: " + mConnectingDevice.deviceName);
unadvertiseDisplay();
mHandler.removeCallbacks(mConnectionTimeout);
final WifiP2pDevice oldDevice = mConnectingDevice;
mWifiP2pManager.cancelConnect(mWifiP2pChannel, new ActionListener() {
@Override
public void onSuccess() {
Slog.i(TAG, "Canceled connection to Wifi display: " + oldDevice.deviceName);
next();
}
@Override
public void onFailure(int reason) {
Slog.i(TAG, "Failed to cancel connection to Wifi display: "
+ oldDevice.deviceName + ", reason=" + reason);
next();
}
private void next() {
if (mConnectingDevice == oldDevice) {
mConnectingDevice = null;
updateConnection();
}
}
});
return; // wait for asynchronous callback
}
// Step 4. If we wanted to disconnect, then mission accomplished.
if (mDesiredDevice == null) {
unadvertiseDisplay();
return; // done
}
// Step 5. Try to connect.
if (mConnectedDevice == null && mConnectingDevice == null) {
Slog.i(TAG, "Connecting to Wifi display: " + mDesiredDevice.deviceName);
mConnectingDevice = mDesiredDevice;
WifiP2pConfig config = new WifiP2pConfig();
config.deviceAddress = mConnectingDevice.deviceAddress;
// Helps with STA & P2P concurrency
config.groupOwnerIntent = WifiP2pConfig.MIN_GROUP_OWNER_INTENT;
WifiDisplay display = createWifiDisplay(mConnectingDevice);
advertiseDisplay(display, null, 0, 0, 0);
final WifiP2pDevice newDevice = mDesiredDevice;
mWifiP2pManager.connect(mWifiP2pChannel, config, new ActionListener() {
@Override
public void onSuccess() {
// The connection may not yet be established. We still need to wait
// for WIFI_P2P_CONNECTION_CHANGED_ACTION. However, we might never
// get that broadcast, so we register a timeout.
Slog.i(TAG, "Initiated connection to Wifi display: " + newDevice.deviceName);
mHandler.postDelayed(mConnectionTimeout, CONNECTION_TIMEOUT_SECONDS * 1000);
}
@Override
public void onFailure(int reason) {
if (mConnectingDevice == newDevice) {
Slog.i(TAG, "Failed to initiate connection to Wifi display: "
+ newDevice.deviceName + ", reason=" + reason);
mConnectingDevice = null;
handleConnectionFailure(false);
}
}
});
return; // wait for asynchronous callback
}
// Step 6. Listen for incoming connections.
if (mConnectedDevice != null && mRemoteDisplay == null) {
Inet4Address addr = getInterfaceAddress(mConnectedDeviceGroupInfo);
if (addr == null) {
Slog.i(TAG, "Failed to get local interface address for communicating "
+ "with Wifi display: " + mConnectedDevice.deviceName);
handleConnectionFailure(false);
return; // done
}
setRemoteSubmixOn(true);
final WifiP2pDevice oldDevice = mConnectedDevice;
final int port = getPortNumber(mConnectedDevice);
final String iface = addr.getHostAddress() + ":" + port;
mRemoteDisplayInterface = iface;
Slog.i(TAG, "Listening for RTSP connection on " + iface
+ " from Wifi display: " + mConnectedDevice.deviceName);
mRemoteDisplay = RemoteDisplay.listen(iface, new RemoteDisplay.Listener() {
@Override
public void onDisplayConnected(Surface surface,
int width, int height, int flags) {
if (mConnectedDevice == oldDevice && !mRemoteDisplayConnected) {
Slog.i(TAG, "Opened RTSP connection with Wifi display: "
+ mConnectedDevice.deviceName);
mRemoteDisplayConnected = true;
mHandler.removeCallbacks(mRtspTimeout);
final WifiDisplay display = createWifiDisplay(mConnectedDevice);
advertiseDisplay(display, surface, width, height, flags);
}
}
@Override
public void onDisplayDisconnected() {
if (mConnectedDevice == oldDevice) {
Slog.i(TAG, "Closed RTSP connection with Wifi display: "
+ mConnectedDevice.deviceName);
mHandler.removeCallbacks(mRtspTimeout);
disconnect();
}
}
@Override
public void onDisplayError(int error) {
if (mConnectedDevice == oldDevice) {
Slog.i(TAG, "Lost RTSP connection with Wifi display due to error "
+ error + ": " + mConnectedDevice.deviceName);
mHandler.removeCallbacks(mRtspTimeout);
handleConnectionFailure(false);
}
}
}, mHandler);
mHandler.postDelayed(mRtspTimeout, RTSP_TIMEOUT_SECONDS * 1000);
}
}
private void setRemoteSubmixOn(boolean on) {
if (mRemoteSubmixOn != on) {
mRemoteSubmixOn = on;
mAudioManager.setRemoteSubmixOn(on, REMOTE_SUBMIX_ADDRESS);
}
}
private void handleStateChanged(boolean enabled) {
mWifiP2pEnabled = enabled;
updateWfdEnableState();
}
private void handlePeersChanged() {
// Even if wfd is disabled, it is best to get the latest set of peers to
// keep in sync with the p2p framework
requestPeers();
}
private void handleConnectionChanged(NetworkInfo networkInfo) {
mNetworkInfo = networkInfo;
if (mWfdEnabled && networkInfo.isConnected()) {
if (mDesiredDevice != null) {
mWifiP2pManager.requestGroupInfo(mWifiP2pChannel, new GroupInfoListener() {
@Override
public void onGroupInfoAvailable(WifiP2pGroup info) {
if (DEBUG) {
Slog.d(TAG, "Received group info: " + describeWifiP2pGroup(info));
}
if (mConnectingDevice != null && !info.contains(mConnectingDevice)) {
Slog.i(TAG, "Aborting connection to Wifi display because "
+ "the current P2P group does not contain the device "
+ "we expected to find: " + mConnectingDevice.deviceName
+ ", group info was: " + describeWifiP2pGroup(info));
handleConnectionFailure(false);
return;
}
if (mDesiredDevice != null && !info.contains(mDesiredDevice)) {
disconnect();
return;
}
if (mConnectingDevice != null && mConnectingDevice == mDesiredDevice) {
Slog.i(TAG, "Connected to Wifi display: "
+ mConnectingDevice.deviceName);
mHandler.removeCallbacks(mConnectionTimeout);
mConnectedDeviceGroupInfo = info;
mConnectedDevice = mConnectingDevice;
mConnectingDevice = null;
updateConnection();
}
}
});
}
} else {
disconnect();
// After disconnection for a group, for some reason we have a tendency
// to get a peer change notification with an empty list of peers.
// Perform a fresh scan.
if (mWfdEnabled) {
requestPeers();
}
}
}
private final Runnable mConnectionTimeout = new Runnable() {
@Override
public void run() {
if (mConnectingDevice != null && mConnectingDevice == mDesiredDevice) {
Slog.i(TAG, "Timed out waiting for Wifi display connection after "
+ CONNECTION_TIMEOUT_SECONDS + " seconds: "
+ mConnectingDevice.deviceName);
handleConnectionFailure(true);
}
}
};
private final Runnable mRtspTimeout = new Runnable() {
@Override
public void run() {
if (mConnectedDevice != null
&& mRemoteDisplay != null && !mRemoteDisplayConnected) {
Slog.i(TAG, "Timed out waiting for Wifi display RTSP connection after "
+ RTSP_TIMEOUT_SECONDS + " seconds: "
+ mConnectedDevice.deviceName);
handleConnectionFailure(true);
}
}
};
private void handleConnectionFailure(boolean timeoutOccurred) {
Slog.i(TAG, "Wifi display connection failed!");
if (mDesiredDevice != null) {
if (mConnectionRetriesLeft > 0) {
final WifiP2pDevice oldDevice = mDesiredDevice;
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
if (mDesiredDevice == oldDevice && mConnectionRetriesLeft > 0) {
mConnectionRetriesLeft -= 1;
Slog.i(TAG, "Retrying Wifi display connection. Retries left: "
+ mConnectionRetriesLeft);
retryConnection();
}
}
}, timeoutOccurred ? 0 : CONNECT_RETRY_DELAY_MILLIS);
} else {
disconnect();
}
}
}
private void advertiseDisplay(final WifiDisplay display,
final Surface surface, final int width, final int height, final int flags) {
if (!Objects.equal(mAdvertisedDisplay, display)
|| mAdvertisedDisplaySurface != surface
|| mAdvertisedDisplayWidth != width
|| mAdvertisedDisplayHeight != height
|| mAdvertisedDisplayFlags != flags) {
final WifiDisplay oldDisplay = mAdvertisedDisplay;
final Surface oldSurface = mAdvertisedDisplaySurface;
mAdvertisedDisplay = display;
mAdvertisedDisplaySurface = surface;
mAdvertisedDisplayWidth = width;
mAdvertisedDisplayHeight = height;
mAdvertisedDisplayFlags = flags;
mHandler.post(new Runnable() {
@Override
public void run() {
if (oldSurface != null && surface != oldSurface) {
mListener.onDisplayDisconnected();
} else if (oldDisplay != null && !Objects.equal(display, oldDisplay)) {
mListener.onDisplayConnectionFailed();
}
if (display != null) {
if (!Objects.equal(display, oldDisplay)) {
mListener.onDisplayConnecting(display);
}
if (surface != null && surface != oldSurface) {
mListener.onDisplayConnected(display, surface, width, height, flags);
}
}
}
});
}
}
private void unadvertiseDisplay() {
advertiseDisplay(null, null, 0, 0, 0);
}
private static Inet4Address getInterfaceAddress(WifiP2pGroup info) {
NetworkInterface iface;
try {
iface = NetworkInterface.getByName(info.getInterface());
} catch (SocketException ex) {
Slog.w(TAG, "Could not obtain address of network interface "
+ info.getInterface(), ex);
return null;
}
Enumeration<InetAddress> addrs = iface.getInetAddresses();
while (addrs.hasMoreElements()) {
InetAddress addr = addrs.nextElement();
if (addr instanceof Inet4Address) {
return (Inet4Address)addr;
}
}
Slog.w(TAG, "Could not obtain address of network interface "
+ info.getInterface() + " because it had no IPv4 addresses.");
return null;
}
private static int getPortNumber(WifiP2pDevice device) {
if (device.deviceName.startsWith("DIRECT-")
&& device.deviceName.endsWith("Broadcom")) {
// These dongles ignore the port we broadcast in our WFD IE.
return 8554;
}
return DEFAULT_CONTROL_PORT;
}
private static boolean isWifiDisplay(WifiP2pDevice device) {
return device.wfdInfo != null
&& device.wfdInfo.isWfdEnabled()
&& isPrimarySinkDeviceType(device.wfdInfo.getDeviceType());
}
private static boolean isPrimarySinkDeviceType(int deviceType) {
return deviceType == WifiP2pWfdInfo.PRIMARY_SINK
|| deviceType == WifiP2pWfdInfo.SOURCE_OR_PRIMARY_SINK;
}
private static String describeWifiP2pDevice(WifiP2pDevice device) {
return device != null ? device.toString().replace('\n', ',') : "null";
}
private static String describeWifiP2pGroup(WifiP2pGroup group) {
return group != null ? group.toString().replace('\n', ',') : "null";
}
private static WifiDisplay createWifiDisplay(WifiP2pDevice device) {
return new WifiDisplay(device.deviceAddress, device.deviceName, null);
}
private final BroadcastReceiver mWifiP2pReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
final String action = intent.getAction();
if (action.equals(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION)) {
// This broadcast is sticky so we'll always get the initial Wifi P2P state
// on startup.
boolean enabled = (intent.getIntExtra(WifiP2pManager.EXTRA_WIFI_STATE,
WifiP2pManager.WIFI_P2P_STATE_DISABLED)) ==
WifiP2pManager.WIFI_P2P_STATE_ENABLED;
if (DEBUG) {
Slog.d(TAG, "Received WIFI_P2P_STATE_CHANGED_ACTION: enabled="
+ enabled);
}
handleStateChanged(enabled);
} else if (action.equals(WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION)) {
if (DEBUG) {
Slog.d(TAG, "Received WIFI_P2P_PEERS_CHANGED_ACTION.");
}
handlePeersChanged();
} else if (action.equals(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION)) {
NetworkInfo networkInfo = (NetworkInfo)intent.getParcelableExtra(
WifiP2pManager.EXTRA_NETWORK_INFO);
if (DEBUG) {
Slog.d(TAG, "Received WIFI_P2P_CONNECTION_CHANGED_ACTION: networkInfo="
+ networkInfo);
}
handleConnectionChanged(networkInfo);
}
}
};
/**
* Called on the handler thread when displays are connected or disconnected.
*/
public interface Listener {
void onFeatureStateChanged(int featureState);
void onScanStarted();
void onScanFinished(WifiDisplay[] availableDisplays);
void onDisplayConnecting(WifiDisplay display);
void onDisplayConnectionFailed();
void onDisplayConnected(WifiDisplay display,
Surface surface, int width, int height, int flags);
void onDisplayDisconnected();
}
}