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|
/*
* Copyright (C) 2010 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 android.net.sip;
import gov.nist.javax.sdp.fields.SDPKeywords;
import android.content.Context;
import android.media.AudioManager;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.media.ToneGenerator;
import android.net.Uri;
import android.net.rtp.AudioCodec;
import android.net.rtp.AudioGroup;
import android.net.rtp.AudioStream;
import android.net.rtp.RtpStream;
import android.net.wifi.WifiManager;
import android.os.Message;
import android.os.RemoteException;
import android.os.Vibrator;
import android.provider.Settings;
import android.util.Log;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.sdp.SdpException;
/**
* Class that handles an audio call over SIP.
*/
/** @hide */
public class SipAudioCallImpl extends SipSessionAdapter
implements SipAudioCall {
private static final String TAG = SipAudioCallImpl.class.getSimpleName();
private static final boolean RELEASE_SOCKET = true;
private static final boolean DONT_RELEASE_SOCKET = false;
private static final String AUDIO = "audio";
private static final int DTMF = 101;
private static final int SESSION_TIMEOUT = 5; // in seconds
private Context mContext;
private SipProfile mLocalProfile;
private SipAudioCall.Listener mListener;
private ISipSession mSipSession;
private SdpSessionDescription mPeerSd;
private AudioStream mAudioStream;
private AudioGroup mAudioGroup;
private SdpSessionDescription.AudioCodec mCodec;
private long mSessionId = -1L; // SDP session ID
private boolean mInCall = false;
private boolean mMuted = false;
private boolean mHold = false;
private boolean mRingbackToneEnabled = true;
private boolean mRingtoneEnabled = true;
private Ringtone mRingtone;
private ToneGenerator mRingbackTone;
private SipProfile mPendingCallRequest;
private WifiManager mWm;
private WifiManager.WifiLock mWifiHighPerfLock;
private int mErrorCode = SipErrorCode.NO_ERROR;
private String mErrorMessage;
public SipAudioCallImpl(Context context, SipProfile localProfile) {
mContext = context;
mLocalProfile = localProfile;
mWm = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
}
public void setListener(SipAudioCall.Listener listener) {
setListener(listener, false);
}
public void setListener(SipAudioCall.Listener listener,
boolean callbackImmediately) {
mListener = listener;
try {
if ((listener == null) || !callbackImmediately) {
// do nothing
} else if (mErrorCode != SipErrorCode.NO_ERROR) {
listener.onError(this, mErrorCode, mErrorMessage);
} else if (mInCall) {
if (mHold) {
listener.onCallHeld(this);
} else {
listener.onCallEstablished(this);
}
} else {
int state = getState();
switch (state) {
case SipSessionState.READY_TO_CALL:
listener.onReadyToCall(this);
break;
case SipSessionState.INCOMING_CALL:
listener.onRinging(this, getPeerProfile(mSipSession));
break;
case SipSessionState.OUTGOING_CALL:
listener.onCalling(this);
break;
case SipSessionState.OUTGOING_CALL_RING_BACK:
listener.onRingingBack(this);
break;
}
}
} catch (Throwable t) {
Log.e(TAG, "setListener()", t);
}
}
public synchronized boolean isInCall() {
return mInCall;
}
public synchronized boolean isOnHold() {
return mHold;
}
public void close() {
close(true);
}
private synchronized void close(boolean closeRtp) {
if (closeRtp) stopCall(RELEASE_SOCKET);
stopRingbackTone();
stopRinging();
mInCall = false;
mHold = false;
mSessionId = -1L;
mErrorCode = SipErrorCode.NO_ERROR;
mErrorMessage = null;
if (mSipSession != null) {
try {
mSipSession.setListener(null);
} catch (RemoteException e) {
// don't care
}
mSipSession = null;
}
}
public synchronized SipProfile getLocalProfile() {
return mLocalProfile;
}
public synchronized SipProfile getPeerProfile() {
try {
return (mSipSession == null) ? null : mSipSession.getPeerProfile();
} catch (RemoteException e) {
return null;
}
}
public synchronized int getState() {
if (mSipSession == null) return SipSessionState.READY_TO_CALL;
try {
return mSipSession.getState();
} catch (RemoteException e) {
return SipSessionState.REMOTE_ERROR;
}
}
public synchronized ISipSession getSipSession() {
return mSipSession;
}
@Override
public void onCalling(ISipSession session) {
Log.d(TAG, "calling... " + session);
Listener listener = mListener;
if (listener != null) {
try {
listener.onCalling(this);
} catch (Throwable t) {
Log.e(TAG, "onCalling()", t);
}
}
}
@Override
public void onRingingBack(ISipSession session) {
Log.d(TAG, "sip call ringing back: " + session);
if (!mInCall) startRingbackTone();
Listener listener = mListener;
if (listener != null) {
try {
listener.onRingingBack(this);
} catch (Throwable t) {
Log.e(TAG, "onRingingBack()", t);
}
}
}
@Override
public synchronized void onRinging(ISipSession session,
SipProfile peerProfile, String sessionDescription) {
try {
if ((mSipSession == null) || !mInCall
|| !session.getCallId().equals(mSipSession.getCallId())) {
// should not happen
session.endCall();
return;
}
// session changing request
try {
mPeerSd = new SdpSessionDescription(sessionDescription);
answerCall(SESSION_TIMEOUT);
} catch (Throwable e) {
Log.e(TAG, "onRinging()", e);
session.endCall();
}
} catch (RemoteException e) {
Log.e(TAG, "onRinging()", e);
}
}
@Override
public void onCallEstablished(ISipSession session,
String sessionDescription) {
stopRingbackTone();
stopRinging();
try {
mPeerSd = new SdpSessionDescription(sessionDescription);
Log.d(TAG, "sip call established: " + mPeerSd);
} catch (SdpException e) {
Log.e(TAG, "createSessionDescription()", e);
}
Listener listener = mListener;
if (listener != null) {
try {
if (mHold) {
listener.onCallHeld(this);
} else {
listener.onCallEstablished(this);
}
} catch (Throwable t) {
Log.e(TAG, "onCallEstablished()", t);
}
}
}
@Override
public void onCallEnded(ISipSession session) {
Log.d(TAG, "sip call ended: " + session);
close();
Listener listener = mListener;
if (listener != null) {
try {
listener.onCallEnded(this);
} catch (Throwable t) {
Log.e(TAG, "onCallEnded()", t);
}
}
}
@Override
public void onCallBusy(ISipSession session) {
Log.d(TAG, "sip call busy: " + session);
close(false);
Listener listener = mListener;
if (listener != null) {
try {
listener.onCallBusy(this);
} catch (Throwable t) {
Log.e(TAG, "onCallBusy()", t);
}
}
}
@Override
public void onCallChangeFailed(ISipSession session, int errorCode,
String message) {
Log.d(TAG, "sip call change failed: " + message);
mErrorCode = errorCode;
mErrorMessage = message;
Listener listener = mListener;
if (listener != null) {
try {
listener.onError(this, mErrorCode, message);
} catch (Throwable t) {
Log.e(TAG, "onCallBusy()", t);
}
}
}
@Override
public void onError(ISipSession session, int errorCode, String message) {
Log.d(TAG, "sip session error: " + SipErrorCode.toString(errorCode)
+ ": " + message);
mErrorCode = errorCode;
mErrorMessage = message;
synchronized (this) {
if ((mErrorCode == SipErrorCode.DATA_CONNECTION_LOST)
|| !isInCall()) {
close(true);
}
}
Listener listener = mListener;
if (listener != null) {
try {
listener.onError(this, errorCode, message);
} catch (Throwable t) {
Log.e(TAG, "onError()", t);
}
}
}
public synchronized void attachCall(ISipSession session,
String sessionDescription) throws SipException {
mSipSession = session;
try {
mPeerSd = new SdpSessionDescription(sessionDescription);
session.setListener(this);
if (getState() == SipSessionState.INCOMING_CALL) startRinging();
} catch (Throwable e) {
Log.e(TAG, "attachCall()", e);
throwSipException(e);
}
}
public synchronized void makeCall(SipProfile peerProfile,
SipManager sipManager, int timeout) throws SipException {
try {
mSipSession = sipManager.createSipSession(mLocalProfile, this);
if (mSipSession == null) {
throw new SipException(
"Failed to create SipSession; network available?");
}
mSipSession.makeCall(peerProfile, createOfferSessionDescription(),
timeout);
} catch (Throwable e) {
if (e instanceof SipException) {
throw (SipException) e;
} else {
throwSipException(e);
}
}
}
public synchronized void endCall() throws SipException {
try {
stopRinging();
stopCall(true);
mInCall = false;
// perform the above local ops first and then network op
if (mSipSession != null) mSipSession.endCall();
} catch (Throwable e) {
throwSipException(e);
}
}
public synchronized void holdCall(int timeout) throws SipException {
if (mHold) return;
try {
mSipSession.changeCall(createHoldSessionDescription(), timeout);
mHold = true;
} catch (Throwable e) {
throwSipException(e);
}
AudioGroup audioGroup = getAudioGroup();
if (audioGroup != null) audioGroup.setMode(AudioGroup.MODE_ON_HOLD);
}
public synchronized void answerCall(int timeout) throws SipException {
try {
stopRinging();
mSipSession.answerCall(createAnswerSessionDescription(), timeout);
} catch (Throwable e) {
Log.e(TAG, "answerCall()", e);
throwSipException(e);
}
}
public synchronized void continueCall(int timeout) throws SipException {
if (!mHold) return;
try {
mHold = false;
mSipSession.changeCall(createContinueSessionDescription(), timeout);
} catch (Throwable e) {
throwSipException(e);
}
AudioGroup audioGroup = getAudioGroup();
if (audioGroup != null) audioGroup.setMode(AudioGroup.MODE_NORMAL);
}
private String createOfferSessionDescription() {
AudioCodec[] codecs = AudioCodec.getSystemSupportedCodecs();
return createSdpBuilder(true, convert(codecs)).build();
}
private String createAnswerSessionDescription() {
try {
// choose an acceptable media from mPeerSd to answer
SdpSessionDescription.AudioCodec codec = getCodec(mPeerSd);
SdpSessionDescription.Builder sdpBuilder =
createSdpBuilder(false, codec);
if (mPeerSd.isSendOnly(AUDIO)) {
sdpBuilder.addMediaAttribute(AUDIO, "recvonly", (String) null);
} else if (mPeerSd.isReceiveOnly(AUDIO)) {
sdpBuilder.addMediaAttribute(AUDIO, "sendonly", (String) null);
}
return sdpBuilder.build();
} catch (SdpException e) {
throw new RuntimeException(e);
}
}
private String createHoldSessionDescription() {
try {
return createSdpBuilder(false, mCodec)
.addMediaAttribute(AUDIO, "sendonly", (String) null)
.build();
} catch (SdpException e) {
throw new RuntimeException(e);
}
}
private void grabWifiHighPerfLock() {
if (mWifiHighPerfLock == null) {
Log.v(TAG, "acquire wifi high perf lock");
mWifiHighPerfLock = ((WifiManager)
mContext.getSystemService(Context.WIFI_SERVICE))
.createWifiLock(WifiManager.WIFI_MODE_FULL_HIGH_PERF, TAG);
mWifiHighPerfLock.acquire();
}
}
private void releaseWifiHighPerfLock() {
if (mWifiHighPerfLock != null) {
Log.v(TAG, "release wifi high perf lock");
mWifiHighPerfLock.release();
mWifiHighPerfLock = null;
}
}
private boolean isWifiOn() {
return (mWm.getConnectionInfo().getBSSID() == null) ? false : true;
}
private String createContinueSessionDescription() {
return createSdpBuilder(true, mCodec).build();
}
private String getMediaDescription(SdpSessionDescription.AudioCodec codec) {
return String.format("%d %s/%d", codec.payloadType, codec.name,
codec.sampleRate);
}
private long getSessionId() {
if (mSessionId < 0) {
mSessionId = System.currentTimeMillis();
}
return mSessionId;
}
private SdpSessionDescription.Builder createSdpBuilder(
boolean addTelephoneEvent,
SdpSessionDescription.AudioCodec... codecs) {
String localIp = getLocalIp();
SdpSessionDescription.Builder sdpBuilder;
try {
long sessionVersion = System.currentTimeMillis();
sdpBuilder = new SdpSessionDescription.Builder("SIP Call")
.setOrigin(mLocalProfile, getSessionId(), sessionVersion,
SDPKeywords.IN, SDPKeywords.IPV4, localIp)
.setConnectionInfo(SDPKeywords.IN, SDPKeywords.IPV4,
localIp);
List<Integer> codecIds = new ArrayList<Integer>();
for (SdpSessionDescription.AudioCodec codec : codecs) {
codecIds.add(codec.payloadType);
}
if (addTelephoneEvent) codecIds.add(DTMF);
sdpBuilder.addMedia(AUDIO, getLocalMediaPort(), 1, "RTP/AVP",
codecIds.toArray(new Integer[codecIds.size()]));
for (SdpSessionDescription.AudioCodec codec : codecs) {
sdpBuilder.addMediaAttribute(AUDIO, "rtpmap",
getMediaDescription(codec));
}
if (addTelephoneEvent) {
sdpBuilder.addMediaAttribute(AUDIO, "rtpmap",
DTMF + " telephone-event/8000");
}
// FIXME: deal with vbr codec
sdpBuilder.addMediaAttribute(AUDIO, "ptime", "20");
} catch (SdpException e) {
throw new RuntimeException(e);
}
return sdpBuilder;
}
public synchronized void toggleMute() {
AudioGroup audioGroup = getAudioGroup();
if (audioGroup != null) {
audioGroup.setMode(
mMuted ? AudioGroup.MODE_NORMAL : AudioGroup.MODE_MUTED);
mMuted = !mMuted;
}
}
public synchronized boolean isMuted() {
return mMuted;
}
public synchronized void setSpeakerMode(boolean speakerMode) {
((AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE))
.setSpeakerphoneOn(speakerMode);
}
public void sendDtmf(int code) {
sendDtmf(code, null);
}
public synchronized void sendDtmf(int code, Message result) {
AudioGroup audioGroup = getAudioGroup();
if ((audioGroup != null) && (mSipSession != null)
&& (SipSessionState.IN_CALL == getState())) {
Log.v(TAG, "send DTMF: " + code);
audioGroup.sendDtmf(code);
}
if (result != null) result.sendToTarget();
}
public synchronized AudioStream getAudioStream() {
return mAudioStream;
}
public synchronized AudioGroup getAudioGroup() {
if (mAudioGroup != null) return mAudioGroup;
return ((mAudioStream == null) ? null : mAudioStream.getAudioGroup());
}
public synchronized void setAudioGroup(AudioGroup group) {
if ((mAudioStream != null) && (mAudioStream.getAudioGroup() != null)) {
mAudioStream.join(group);
}
mAudioGroup = group;
}
private SdpSessionDescription.AudioCodec getCodec(SdpSessionDescription sd) {
HashMap<String, AudioCodec> acceptableCodecs =
new HashMap<String, AudioCodec>();
for (AudioCodec codec : AudioCodec.getSystemSupportedCodecs()) {
acceptableCodecs.put(codec.name, codec);
}
for (SdpSessionDescription.AudioCodec codec : sd.getAudioCodecs()) {
AudioCodec matchedCodec = acceptableCodecs.get(codec.name);
if (matchedCodec != null) return codec;
}
Log.w(TAG, "no common codec is found, use PCM/0");
return convert(AudioCodec.ULAW);
}
private AudioCodec convert(SdpSessionDescription.AudioCodec codec) {
AudioCodec c = AudioCodec.getSystemSupportedCodec(codec.name);
return ((c == null) ? AudioCodec.ULAW : c);
}
private SdpSessionDescription.AudioCodec convert(AudioCodec codec) {
return new SdpSessionDescription.AudioCodec(codec.defaultType,
codec.name, codec.sampleRate, codec.sampleCount);
}
private SdpSessionDescription.AudioCodec[] convert(AudioCodec[] codecs) {
SdpSessionDescription.AudioCodec[] copies =
new SdpSessionDescription.AudioCodec[codecs.length];
for (int i = 0, len = codecs.length; i < len; i++) {
copies[i] = convert(codecs[i]);
}
return copies;
}
public void startAudio() {
try {
startAudioInternal();
} catch (UnknownHostException e) {
onError(mSipSession, SipErrorCode.PEER_NOT_REACHABLE,
e.getMessage());
} catch (Throwable e) {
onError(mSipSession, SipErrorCode.CLIENT_ERROR,
e.getMessage());
}
}
private synchronized void startAudioInternal() throws UnknownHostException {
stopCall(DONT_RELEASE_SOCKET);
mInCall = true;
SdpSessionDescription peerSd = mPeerSd;
if (isWifiOn()) grabWifiHighPerfLock();
String peerMediaAddress = peerSd.getPeerMediaAddress(AUDIO);
// TODO: handle multiple media fields
int peerMediaPort = peerSd.getPeerMediaPort(AUDIO);
Log.i(TAG, "start audiocall " + peerMediaAddress + ":" + peerMediaPort);
int localPort = getLocalMediaPort();
int sampleRate = 8000;
int frameSize = sampleRate / 50; // 160
// TODO: get sample rate from sdp
mCodec = getCodec(peerSd);
AudioStream audioStream = mAudioStream;
audioStream.associate(InetAddress.getByName(peerMediaAddress),
peerMediaPort);
audioStream.setCodec(convert(mCodec), mCodec.payloadType);
audioStream.setDtmfType(DTMF);
Log.d(TAG, "start media: localPort=" + localPort + ", peer="
+ peerMediaAddress + ":" + peerMediaPort);
audioStream.setMode(RtpStream.MODE_NORMAL);
if (!mHold) {
// FIXME: won't work if peer is not sending nor receiving
if (!peerSd.isSending(AUDIO)) {
Log.d(TAG, " not receiving");
audioStream.setMode(RtpStream.MODE_SEND_ONLY);
}
if (!peerSd.isReceiving(AUDIO)) {
Log.d(TAG, " not sending");
audioStream.setMode(RtpStream.MODE_RECEIVE_ONLY);
}
/* The recorder volume will be very low if the device is in
* IN_CALL mode. Therefore, we have to set the mode to NORMAL
* in order to have the normal microphone level.
*/
((AudioManager) mContext.getSystemService
(Context.AUDIO_SERVICE))
.setMode(AudioManager.MODE_NORMAL);
}
// AudioGroup logic:
AudioGroup audioGroup = getAudioGroup();
if (mHold) {
if (audioGroup != null) {
audioGroup.setMode(AudioGroup.MODE_ON_HOLD);
}
// don't create an AudioGroup here; doing so will fail if
// there's another AudioGroup out there that's active
} else {
if (audioGroup == null) audioGroup = new AudioGroup();
audioStream.join(audioGroup);
if (mMuted) {
audioGroup.setMode(AudioGroup.MODE_MUTED);
} else {
audioGroup.setMode(AudioGroup.MODE_NORMAL);
}
}
}
private void stopCall(boolean releaseSocket) {
Log.d(TAG, "stop audiocall");
releaseWifiHighPerfLock();
if (mAudioStream != null) {
mAudioStream.join(null);
if (releaseSocket) {
mAudioStream.release();
mAudioStream = null;
}
}
}
private int getLocalMediaPort() {
if (mAudioStream != null) return mAudioStream.getLocalPort();
try {
AudioStream s = mAudioStream =
new AudioStream(InetAddress.getByName(getLocalIp()));
return s.getLocalPort();
} catch (IOException e) {
Log.w(TAG, "getLocalMediaPort(): " + e);
throw new RuntimeException(e);
}
}
private String getLocalIp() {
try {
return mSipSession.getLocalIp();
} catch (RemoteException e) {
// FIXME
return "127.0.0.1";
}
}
public synchronized void setRingbackToneEnabled(boolean enabled) {
mRingbackToneEnabled = enabled;
}
public synchronized void setRingtoneEnabled(boolean enabled) {
mRingtoneEnabled = enabled;
}
private void startRingbackTone() {
if (!mRingbackToneEnabled) return;
if (mRingbackTone == null) {
// The volume relative to other sounds in the stream
int toneVolume = 80;
mRingbackTone = new ToneGenerator(
AudioManager.STREAM_VOICE_CALL, toneVolume);
}
mRingbackTone.startTone(ToneGenerator.TONE_CDMA_LOW_PBX_L);
}
private void stopRingbackTone() {
if (mRingbackTone != null) {
mRingbackTone.stopTone();
mRingbackTone.release();
mRingbackTone = null;
}
}
private void startRinging() {
if (!mRingtoneEnabled) return;
((Vibrator) mContext.getSystemService(Context.VIBRATOR_SERVICE))
.vibrate(new long[] {0, 1000, 1000}, 1);
AudioManager am = (AudioManager)
mContext.getSystemService(Context.AUDIO_SERVICE);
if (am.getStreamVolume(AudioManager.STREAM_RING) > 0) {
String ringtoneUri =
Settings.System.DEFAULT_RINGTONE_URI.toString();
mRingtone = RingtoneManager.getRingtone(mContext,
Uri.parse(ringtoneUri));
mRingtone.play();
}
}
private void stopRinging() {
((Vibrator) mContext.getSystemService(Context.VIBRATOR_SERVICE))
.cancel();
if (mRingtone != null) mRingtone.stop();
}
private void throwSipException(Throwable throwable) throws SipException {
if (throwable instanceof SipException) {
throw (SipException) throwable;
} else {
throw new SipException("", throwable);
}
}
private SipProfile getPeerProfile(ISipSession session) {
try {
return session.getPeerProfile();
} catch (RemoteException e) {
return null;
}
}
}
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