| /* |
| * libjingle |
| * Copyright 2013 Google Inc. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
| * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package org.webrtc; |
| |
| import java.nio.ByteBuffer; |
| |
| /** Java wrapper for a C++ DataChannelInterface. */ |
| public class DataChannel { |
| /** Java wrapper for WebIDL RTCDataChannel. */ |
| public static class Init { |
| public boolean ordered = true; |
| // Optional unsigned short in WebIDL, -1 means unspecified. |
| public int maxRetransmitTimeMs = -1; |
| // Optional unsigned short in WebIDL, -1 means unspecified. |
| public int maxRetransmits = -1; |
| public String protocol = ""; |
| public boolean negotiated = false; |
| // Optional unsigned short in WebIDL, -1 means unspecified. |
| public int id = -1; |
| |
| public Init() {} |
| |
| // Called only by native code. |
| private Init( |
| boolean ordered, int maxRetransmitTimeMs, int maxRetransmits, |
| String protocol, boolean negotiated, int id) { |
| this.ordered = ordered; |
| this.maxRetransmitTimeMs = maxRetransmitTimeMs; |
| this.maxRetransmits = maxRetransmits; |
| this.protocol = protocol; |
| this.negotiated = negotiated; |
| this.id = id; |
| } |
| } |
| |
| /** Java version of C++ DataBuffer. The atom of data in a DataChannel. */ |
| public static class Buffer { |
| /** The underlying data. */ |
| public final ByteBuffer data; |
| |
| /** |
| * Indicates whether |data| contains UTF-8 text or "binary data" |
| * (i.e. anything else). |
| */ |
| public final boolean binary; |
| |
| public Buffer(ByteBuffer data, boolean binary) { |
| this.data = data; |
| this.binary = binary; |
| } |
| } |
| |
| /** Java version of C++ DataChannelObserver. */ |
| public interface Observer { |
| /** The data channel's bufferedAmount has changed. */ |
| public void onBufferedAmountChange(long previousAmount); |
| /** The data channel state has changed. */ |
| public void onStateChange(); |
| /** |
| * A data buffer was successfully received. NOTE: |buffer.data| will be |
| * freed once this function returns so callers who want to use the data |
| * asynchronously must make sure to copy it first. |
| */ |
| public void onMessage(Buffer buffer); |
| } |
| |
| /** Keep in sync with DataChannelInterface::DataState. */ |
| public enum State { CONNECTING, OPEN, CLOSING, CLOSED }; |
| |
| private final long nativeDataChannel; |
| private long nativeObserver; |
| |
| public DataChannel(long nativeDataChannel) { |
| this.nativeDataChannel = nativeDataChannel; |
| } |
| |
| /** Register |observer|, replacing any previously-registered observer. */ |
| public void registerObserver(Observer observer) { |
| if (nativeObserver != 0) { |
| unregisterObserverNative(nativeObserver); |
| } |
| nativeObserver = registerObserverNative(observer); |
| } |
| private native long registerObserverNative(Observer observer); |
| |
| /** Unregister the (only) observer. */ |
| public void unregisterObserver() { |
| unregisterObserverNative(nativeObserver); |
| } |
| private native void unregisterObserverNative(long nativeObserver); |
| |
| public native String label(); |
| |
| public native State state(); |
| |
| /** |
| * Return the number of bytes of application data (UTF-8 text and binary data) |
| * that have been queued using SendBuffer but have not yet been transmitted |
| * to the network. |
| */ |
| public native long bufferedAmount(); |
| |
| /** Close the channel. */ |
| public native void close(); |
| |
| /** Send |data| to the remote peer; return success. */ |
| public boolean send(Buffer buffer) { |
| // TODO(fischman): this could be cleverer about avoiding copies if the |
| // ByteBuffer is direct and/or is backed by an array. |
| byte[] data = new byte[buffer.data.remaining()]; |
| buffer.data.get(data); |
| return sendNative(data, buffer.binary); |
| } |
| private native boolean sendNative(byte[] data, boolean binary); |
| |
| /** Dispose of native resources attached to this channel. */ |
| public native void dispose(); |
| }; |