forked from react-native-webrtc/react-native-webrtc
/
PeerConnectionObserver.java
529 lines (465 loc) · 19.2 KB
/
PeerConnectionObserver.java
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package com.oney.WebRTCModule;
import java.io.UnsupportedEncodingException;
import java.lang.ref.SoftReference;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import android.support.annotation.Nullable;
import android.util.Base64;
import android.util.Log;
import android.util.SparseArray;
import com.facebook.react.bridge.Arguments;
import com.facebook.react.bridge.Callback;
import com.facebook.react.bridge.ReadableMap;
import com.facebook.react.bridge.WritableArray;
import com.facebook.react.bridge.WritableMap;
import org.webrtc.AudioTrack;
import org.webrtc.DataChannel;
import org.webrtc.IceCandidate;
import org.webrtc.MediaStream;
import org.webrtc.MediaStreamTrack;
import org.webrtc.PeerConnection;
import org.webrtc.RtpReceiver;
import org.webrtc.StatsObserver;
import org.webrtc.StatsReport;
import org.webrtc.VideoTrack;
class PeerConnectionObserver implements PeerConnection.Observer {
private final static String TAG = WebRTCModule.TAG;
private final SparseArray<DataChannel> dataChannels
= new SparseArray<DataChannel>();
private final int id;
private PeerConnection peerConnection;
final List<MediaStream> localStreams;
final Map<String, MediaStream> remoteStreams;
final Map<String, MediaStreamTrack> remoteTracks;
private final VideoTrackAdapter videoTrackAdapters;
private final WebRTCModule webRTCModule;
/**
* The <tt>StringBuilder</tt> cache utilized by {@link #statsToJSON} in
* order to minimize the number of allocations of <tt>StringBuilder</tt>
* instances and, more importantly, the allocations of its <tt>char</tt>
* buffer in an attempt to improve performance.
*/
private SoftReference<StringBuilder> statsToJSONStringBuilder
= new SoftReference<>(null);
PeerConnectionObserver(WebRTCModule webRTCModule, int id) {
this.webRTCModule = webRTCModule;
this.id = id;
this.localStreams = new ArrayList<MediaStream>();
this.remoteStreams = new HashMap<String, MediaStream>();
this.remoteTracks = new HashMap<String, MediaStreamTrack>();
this.videoTrackAdapters = new VideoTrackAdapter(webRTCModule, id);
}
/**
* Adds a specific local <tt>MediaStream</tt> to the associated
* <tt>PeerConnection</tt>.
*
* @param localStream the local <tt>MediaStream</tt> to add to the
* associated <tt>PeerConnection</tt>
* @return <tt>true</tt> if the specified <tt>localStream</tt> was added to
* the associated <tt>PeerConnection</tt>; otherwise, <tt>false</tt>
*/
boolean addStream(MediaStream localStream) {
if (peerConnection != null && peerConnection.addStream(localStream)) {
localStreams.add(localStream);
return true;
}
return false;
}
/**
* Removes a specific local <tt>MediaStream</tt> from the associated
* <tt>PeerConnection</tt>.
*
* @param localStream the local <tt>MediaStream</tt> from the associated
* <tt>PeerConnection</tt>
* @return <tt>true</tt> if removing the specified <tt>mediaStream</tt> from
* this instance resulted in a modification of its internal list of local
* <tt>MediaStream</tt>s; otherwise, <tt>false</tt>
*/
boolean removeStream(MediaStream localStream) {
if (peerConnection != null) {
peerConnection.removeStream(localStream);
}
return localStreams.remove(localStream);
}
PeerConnection getPeerConnection() {
return peerConnection;
}
void setPeerConnection(PeerConnection peerConnection) {
this.peerConnection = peerConnection;
}
void close() {
Log.d(TAG, "PeerConnection.close() for " + id);
// Close the PeerConnection first to stop any events.
peerConnection.close();
// PeerConnection.dispose() calls MediaStream.dispose() on all local
// MediaStreams added to it and the app may crash if a local MediaStream
// is added to multiple PeerConnections. In order to reduce the risks of
// an app crash, remove all local MediaStreams from the associated
// PeerConnection so that it doesn't attempt to dispose of them.
for (MediaStream localStream : new ArrayList<>(localStreams)) {
removeStream(localStream);
}
// Remove video track adapters
for (MediaStream stream : remoteStreams.values()) {
for (VideoTrack videoTrack : stream.videoTracks) {
videoTrackAdapters.removeAdapter(videoTrack);
}
}
// At this point there should be no local MediaStreams in the associated
// PeerConnection. Call dispose() to free all remaining resources held
// by the PeerConnection instance (RtpReceivers, RtpSenders, etc.)
peerConnection.dispose();
remoteStreams.clear();
remoteTracks.clear();
// Unlike on iOS, we cannot unregister the DataChannel.Observer
// instance on Android. At least do whatever else we do on iOS.
dataChannels.clear();
}
void createDataChannel(String label, ReadableMap config) {
DataChannel.Init init = new DataChannel.Init();
if (config != null) {
if (config.hasKey("id")) {
init.id = config.getInt("id");
}
if (config.hasKey("ordered")) {
init.ordered = config.getBoolean("ordered");
}
if (config.hasKey("maxRetransmitTime")) {
init.maxRetransmitTimeMs = config.getInt("maxRetransmitTime");
}
if (config.hasKey("maxRetransmits")) {
init.maxRetransmits = config.getInt("maxRetransmits");
}
if (config.hasKey("protocol")) {
init.protocol = config.getString("protocol");
}
if (config.hasKey("negotiated")) {
init.negotiated = config.getBoolean("negotiated");
}
}
DataChannel dataChannel = peerConnection.createDataChannel(label, init);
int dataChannelId = init.id;
if (-1 != dataChannelId) {
dataChannels.put(dataChannelId, dataChannel);
registerDataChannelObserver(dataChannelId, dataChannel);
}
}
void dataChannelClose(int dataChannelId) {
DataChannel dataChannel = dataChannels.get(dataChannelId);
if (dataChannel != null) {
dataChannel.close();
dataChannels.remove(dataChannelId);
} else {
Log.d(TAG, "dataChannelClose() dataChannel is null");
}
}
void dataChannelSend(int dataChannelId, String data, String type) {
DataChannel dataChannel = dataChannels.get(dataChannelId);
if (dataChannel != null) {
byte[] byteArray;
if (type.equals("text")) {
try {
byteArray = data.getBytes("UTF-8");
} catch (UnsupportedEncodingException e) {
Log.d(TAG, "Could not encode text string as UTF-8.");
return;
}
} else if (type.equals("binary")) {
byteArray = Base64.decode(data, Base64.NO_WRAP);
} else {
Log.e(TAG, "Unsupported data type: " + type);
return;
}
ByteBuffer byteBuffer = ByteBuffer.wrap(byteArray);
DataChannel.Buffer buffer = new DataChannel.Buffer(byteBuffer, type.equals("binary"));
dataChannel.send(buffer);
} else {
Log.d(TAG, "dataChannelSend() dataChannel is null");
}
}
@SuppressWarnings("deprecation") // TODO(saghul): getStats is deprecated.
void getStats(String trackId, final Callback cb) {
MediaStreamTrack track = null;
if (trackId == null
|| trackId.isEmpty()
|| (track = webRTCModule.getLocalTrack(trackId)) != null
|| (track = remoteTracks.get(trackId)) != null) {
peerConnection.getStats(
reports -> cb.invoke(true, statsToJSON(reports)),
track);
} else {
Log.e(TAG, "peerConnectionGetStats() MediaStreamTrack not found for id: " + trackId);
cb.invoke(false, "Track not found");
}
}
/**
* Constructs a JSON <tt>String</tt> representation of a specific array of
* <tt>StatsReport</tt>s (produced by {@link PeerConnection#getStats}).
* <p>
* On Android it is faster to (1) construct a single JSON <tt>String</tt>
* representation of an array of <tt>StatsReport</tt>s and (2) have it pass
* through the React Native bridge rather than the array of
* <tt>StatsReport</tt>s.
*
* @param reports the array of <tt>StatsReport</tt>s to represent in JSON
* format
* @return a <tt>String</tt> which represents the specified <tt>reports</tt>
* in JSON format
*/
private String statsToJSON(StatsReport[] reports) {
// If possible, reuse a single StringBuilder instance across multiple
// getStats method calls in order to reduce the total number of
// allocations.
StringBuilder s = statsToJSONStringBuilder.get();
if (s == null) {
s = new StringBuilder();
statsToJSONStringBuilder = new SoftReference(s);
}
s.append('[');
final int reportCount = reports.length;
for (int i = 0; i < reportCount; ++i) {
StatsReport report = reports[i];
if (i != 0) {
s.append(',');
}
s.append("{\"id\":\"").append(report.id)
.append("\",\"type\":\"").append(report.type)
.append("\",\"timestamp\":").append(report.timestamp)
.append(",\"values\":[");
StatsReport.Value[] values = report.values;
final int valueCount = values.length;
for (int j = 0; j < valueCount; ++j) {
StatsReport.Value v = values[j];
if (j != 0) {
s.append(',');
}
s.append("{\"").append(v.name).append("\":\"").append(v.value)
.append("\"}");
}
s.append("]}");
}
s.append("]");
String r = s.toString();
// Prepare the StringBuilder instance for reuse (in order to reduce the
// total number of allocations performed during multiple getStats method
// calls).
s.setLength(0);
return r;
}
@Override
public void onIceCandidate(final IceCandidate candidate) {
Log.d(TAG, "onIceCandidate");
WritableMap params = Arguments.createMap();
params.putInt("id", id);
WritableMap candidateParams = Arguments.createMap();
candidateParams.putInt("sdpMLineIndex", candidate.sdpMLineIndex);
candidateParams.putString("sdpMid", candidate.sdpMid);
candidateParams.putString("candidate", candidate.sdp);
params.putMap("candidate", candidateParams);
webRTCModule.sendEvent("peerConnectionGotICECandidate", params);
}
@Override
public void onIceCandidatesRemoved(final IceCandidate[] candidates) {
Log.d(TAG, "onIceCandidatesRemoved");
}
@Override
public void onIceConnectionChange(PeerConnection.IceConnectionState iceConnectionState) {
WritableMap params = Arguments.createMap();
params.putInt("id", id);
params.putString("iceConnectionState", iceConnectionStateString(iceConnectionState));
webRTCModule.sendEvent("peerConnectionIceConnectionChanged", params);
}
@Override
public void onIceConnectionReceivingChange(boolean var1) {
}
@Override
public void onIceGatheringChange(PeerConnection.IceGatheringState iceGatheringState) {
Log.d(TAG, "onIceGatheringChange" + iceGatheringState.name());
WritableMap params = Arguments.createMap();
params.putInt("id", id);
params.putString("iceGatheringState", iceGatheringStateString(iceGatheringState));
webRTCModule.sendEvent("peerConnectionIceGatheringChanged", params);
}
private String getReactTagForStream(MediaStream mediaStream) {
for (Iterator<Map.Entry<String, MediaStream>> i
= remoteStreams.entrySet().iterator();
i.hasNext();) {
Map.Entry<String, MediaStream> e = i.next();
if (e.getValue().equals(mediaStream)) {
return e.getKey();
}
}
return null;
}
@Override
public void onAddStream(MediaStream mediaStream) {
String streamReactTag = null;
String streamId = mediaStream.getId();
// The native WebRTC implementation has a special concept of a default
// MediaStream instance with the label default that the implementation
// reuses.
if ("default".equals(streamId)) {
for (Map.Entry<String, MediaStream> e : remoteStreams.entrySet()) {
if (e.getValue().equals(mediaStream)) {
streamReactTag = e.getKey();
break;
}
}
}
if (streamReactTag == null) {
streamReactTag = UUID.randomUUID().toString();
remoteStreams.put(streamReactTag, mediaStream);
}
WritableMap params = Arguments.createMap();
params.putInt("id", id);
params.putString("streamId", streamId);
params.putString("streamReactTag", streamReactTag);
WritableArray tracks = Arguments.createArray();
for (int i = 0; i < mediaStream.videoTracks.size(); i++) {
VideoTrack track = mediaStream.videoTracks.get(i);
String trackId = track.id();
remoteTracks.put(trackId, track);
WritableMap trackInfo = Arguments.createMap();
trackInfo.putString("id", trackId);
trackInfo.putString("label", "Video");
trackInfo.putString("kind", track.kind());
trackInfo.putBoolean("enabled", track.enabled());
trackInfo.putString("readyState", track.state().toString());
trackInfo.putBoolean("remote", true);
tracks.pushMap(trackInfo);
videoTrackAdapters.addAdapter(streamReactTag, track);
}
for (int i = 0; i < mediaStream.audioTracks.size(); i++) {
AudioTrack track = mediaStream.audioTracks.get(i);
String trackId = track.id();
remoteTracks.put(trackId, track);
WritableMap trackInfo = Arguments.createMap();
trackInfo.putString("id", trackId);
trackInfo.putString("label", "Audio");
trackInfo.putString("kind", track.kind());
trackInfo.putBoolean("enabled", track.enabled());
trackInfo.putString("readyState", track.state().toString());
trackInfo.putBoolean("remote", true);
tracks.pushMap(trackInfo);
}
params.putArray("tracks", tracks);
webRTCModule.sendEvent("peerConnectionAddedStream", params);
}
@Override
public void onRemoveStream(MediaStream mediaStream) {
String streamReactTag = getReactTagForStream(mediaStream);
if (streamReactTag == null) {
Log.w(TAG,
"onRemoveStream - no remote stream for id: "
+ mediaStream.getId());
return;
}
for (VideoTrack track : mediaStream.videoTracks) {
this.videoTrackAdapters.removeAdapter(track);
this.remoteTracks.remove(track.id());
}
for (AudioTrack track : mediaStream.audioTracks) {
this.remoteTracks.remove(track.id());
}
this.remoteStreams.remove(streamReactTag);
WritableMap params = Arguments.createMap();
params.putInt("id", id);
params.putString("streamId", streamReactTag);
webRTCModule.sendEvent("peerConnectionRemovedStream", params);
}
@Override
public void onDataChannel(DataChannel dataChannel) {
final int dataChannelId = dataChannel.id();
if (-1 == dataChannelId) {
return;
}
WritableMap dataChannelParams = Arguments.createMap();
dataChannelParams.putInt("id", dataChannelId);
dataChannelParams.putString("label", dataChannel.label());
WritableMap params = Arguments.createMap();
params.putInt("id", id);
params.putMap("dataChannel", dataChannelParams);
dataChannels.put(dataChannelId, dataChannel);
registerDataChannelObserver(dataChannelId, dataChannel);
webRTCModule.sendEvent("peerConnectionDidOpenDataChannel", params);
}
private void registerDataChannelObserver(int dcId, DataChannel dataChannel) {
// DataChannel.registerObserver implementation does not allow to
// unregister, so the observer is registered here and is never
// unregistered
dataChannel.registerObserver(
new DataChannelObserver(webRTCModule, id, dcId, dataChannel));
}
@Override
public void onRenegotiationNeeded() {
WritableMap params = Arguments.createMap();
params.putInt("id", id);
webRTCModule.sendEvent("peerConnectionOnRenegotiationNeeded", params);
}
@Override
public void onSignalingChange(PeerConnection.SignalingState signalingState) {
WritableMap params = Arguments.createMap();
params.putInt("id", id);
params.putString("signalingState", signalingStateString(signalingState));
webRTCModule.sendEvent("peerConnectionSignalingStateChanged", params);
}
@Override
public void onAddTrack(final RtpReceiver receiver, final MediaStream[] mediaStreams) {
Log.d(TAG, "onAddTrack");
}
@Nullable
private String iceConnectionStateString(PeerConnection.IceConnectionState iceConnectionState) {
switch (iceConnectionState) {
case NEW:
return "new";
case CHECKING:
return "checking";
case CONNECTED:
return "connected";
case COMPLETED:
return "completed";
case FAILED:
return "failed";
case DISCONNECTED:
return "disconnected";
case CLOSED:
return "closed";
}
return null;
}
@Nullable
private String iceGatheringStateString(PeerConnection.IceGatheringState iceGatheringState) {
switch (iceGatheringState) {
case NEW:
return "new";
case GATHERING:
return "gathering";
case COMPLETE:
return "complete";
}
return null;
}
@Nullable
private String signalingStateString(PeerConnection.SignalingState signalingState) {
switch (signalingState) {
case STABLE:
return "stable";
case HAVE_LOCAL_OFFER:
return "have-local-offer";
case HAVE_LOCAL_PRANSWER:
return "have-local-pranswer";
case HAVE_REMOTE_OFFER:
return "have-remote-offer";
case HAVE_REMOTE_PRANSWER:
return "have-remote-pranswer";
case CLOSED:
return "closed";
}
return null;
}
}