1 /* 2 * Copyright 2013 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 package org.webrtc; 12 13 /** Java wrapper for a C++ MediaSourceInterface. */ 14 public class MediaSource { 15 /** Tracks MediaSourceInterface.SourceState */ 16 public enum State { 17 INITIALIZING, 18 LIVE, 19 ENDED, 20 MUTED; 21 22 @CalledByNative("State") fromNativeIndex(int nativeIndex)23 static State fromNativeIndex(int nativeIndex) { 24 return values()[nativeIndex]; 25 } 26 } 27 28 private final RefCountDelegate refCountDelegate; 29 private long nativeSource; 30 MediaSource(long nativeSource)31 public MediaSource(long nativeSource) { 32 refCountDelegate = new RefCountDelegate(() -> JniCommon.nativeReleaseRef(nativeSource)); 33 this.nativeSource = nativeSource; 34 } 35 state()36 public State state() { 37 checkMediaSourceExists(); 38 return nativeGetState(nativeSource); 39 } 40 dispose()41 public void dispose() { 42 checkMediaSourceExists(); 43 refCountDelegate.release(); 44 nativeSource = 0; 45 } 46 47 /** Returns a pointer to webrtc::MediaSourceInterface. */ getNativeMediaSource()48 protected long getNativeMediaSource() { 49 checkMediaSourceExists(); 50 return nativeSource; 51 } 52 53 /** 54 * Runs code in {@code runnable} holding a reference to the media source. If the object has 55 * already been released, does nothing. 56 */ runWithReference(Runnable runnable)57 void runWithReference(Runnable runnable) { 58 if (refCountDelegate.safeRetain()) { 59 try { 60 runnable.run(); 61 } finally { 62 refCountDelegate.release(); 63 } 64 } 65 } 66 checkMediaSourceExists()67 private void checkMediaSourceExists() { 68 if (nativeSource == 0) { 69 throw new IllegalStateException("MediaSource has been disposed."); 70 } 71 } 72 nativeGetState(long pointer)73 private static native State nativeGetState(long pointer); 74 } 75