JMF2.11E源代码

/* * @(#)MpegParser.java 1.50 01/02/27 * * Licensed Materials - Property of IBM * "Restricted Materials of IBM" * 5648-B81 * (c) Copyright IBM Corporation 1998,1999 All Rights Reserved * US Government Users Restricted Rights - Use, duplication or * disclosure restricted by GSA ADP Schedule Contract with * IBM Corporation. * */ package com.ibm.media.parser.video; import java.security.*; import java.lang.reflect.Method; import java.lang.reflect.Constructor; import java.io.OutputStream; //EE temporary! import java.io.FileOutputStream; //EE temporary! import java.io.IOException; import java.awt.Dimension; import javax.media.*; import javax.media.protocol.DataSource; import javax.media.protocol.SourceStream; import javax.media.protocol.PullSourceStream; import javax.media.protocol.Seekable; import javax.media.protocol.Positionable; import javax.media.Format; import javax.media.protocol.ContentDescriptor; import javax.media.protocol.FileTypeDescriptor; import javax.media.format.AudioFormat; import javax.media.format.VideoFormat; import com.sun.media.format.WavAudioFormat; import com.sun.media.parser.BasicPullParser; import com.sun.media.parser.BasicTrack; import com.sun.media.util.jdk12; import com.sun.media.util.LoopThread; import com.sun.media.JMFSecurity; import com.sun.media.JMFSecurityManager; import com.sun.media.CircularBuffer; import com.sun.media.Log; import com.ms.security.PermissionID; import com.ms.security.PolicyEngine; public class MpegParser extends BasicPullParser { /* * Temporary fields */ /* temporary for saving in output files */ boolean saveOutputFlag = false; //true; String AoutName = "Audio.mpg"; String VoutName = "Video.mpg"; FileOutputStream aout; FileOutputStream vout; /* temporary for throwing all data away */ boolean throwOutputFlag = false; /// true; /* As long as MPEG audio decoder doesn't exist, the audio track should be * hidden inside the parser. That's mean that only video tracks are output * of getTracks, and once in a while the audio buffer should be just flushed. * There is a similar option to ignore the video data. */ boolean hideAudioTracks = false; //true; boolean hideVideoTracks = false; /* * Constants definitions for the MPEG-1 system layer splitter */ static final long NO_PTS_VAL = -3333333; /* an arbitray value */ private static final float EPSILON_PTS = 45000; /* which is 0.5 sec in PTS units */ private static final float EPSILON_NS = 500000000; /* which is 0.5 sec in nanoseconds */ /* The nature of MPEG video stream is that I frames usually apears every * 15 frames. In setPosition, we want to have an I frame before the time * being setted. This is why we will try to look for time stamp of 0.5 seconds * earlier (in common frame rates of 24-30 frames per second, 0.5 second will * probably include an I frame). */ private static final long PRE_ROLLING_DELTA_NS = 500000000; /* which is 0.5 sec in nano-seconds */ /* packet/track/stream type */ private static final byte UNKNOWN_TYPE = 0; private static final byte AUDIO_TYPE = 1; private static final byte VIDEO_TYPE = 2; private static final byte SYS11172_TYPE = 3; /* streams buffer size */ private static final int AUDIO_TRACK_BUF_SIZE = 100000; private static final int VIDEO_TRACK_BUF_SIZE = 200000; /* codes definition */ private static final int PACK_START_CODE = 0x000001BA; private static final int SYSTEM_HEADER_START_CODE = 0x000001BB; private static final int PACKET_START_CODE_24 = 0x000001; /* 24 bits of 0x000001 */ private static final int END_CODE = 0x000001B9; private static final int MIN_STREAM_CODE = 0x00BC; private static final int MAX_STREAM_CODE = 0x00FF; private static final int PRIVATE_STREAM2_CODE = 0x00BF; private static final int VIDEO_PICTURE_START_CODE = 0x00000100; private static final int VIDEO_SEQUENCE_HEADER_CODE = 0x000001B3; private static final int VIDEO_GROUP_START_CODE = 0x000001B8; /* streams IDs */ private static final int MAX_AUDIO_STREAMS = 32; private static final int MAX_VIDEO_STREAMS = 16; private static final int MAX_NUM_STREAMS = 48; private static final int MIN_AUDIO_ID = 0; private static final int MAX_AUDIO_ID = 31; private static final int MIN_VIDEO_ID = 32; private static final int MAX_VIDEO_ID = 47; private static int MAX_TRACKS_SUPPORTED = MAX_NUM_STREAMS; /* * Fields */ private static ContentDescriptor[] supportedFormat = new ContentDescriptor[] { new ContentDescriptor("audio.mpeg"), new ContentDescriptor(FileTypeDescriptor.MPEG), new ContentDescriptor(FileTypeDescriptor.MPEG_AUDIO)}; private PullSourceStream stream = null; private TrackList[] trackList = new TrackList[MAX_TRACKS_SUPPORTED]; private Track[] tracks = null; private Track[] videoTracks = null; /// temporary, for hiding audio tracks private Track[] audioTracks = null; /// temporary, for hiding video tracks private int videoCount = 0; /// temporary, for hiding audio tracks private int audioCount = 0; /// temporary, for hiding video tracks private int numSupportedTracks = 0; private int numTracks = 0; private int numPackets = 0; private int initTmpBufLen; // a buffer used in the initation phase private byte[] initTmpStreamBuf; private byte streamType = UNKNOWN_TYPE; // stream can be of: Unknown/Audio/Video/System11172 type private long streamContentLength = 0L; private SystemHeader sysHeader = new SystemHeader(); private boolean sysHeaderSeen = false; boolean EOMflag = false; boolean parserErrorFlag = false; private boolean durationInitialized = false; private boolean sysPausedFlag = false; private boolean seekableStreamFlag = false; // can be seeked at least to the beginning private boolean randomAccessStreamFlag = true; // can be seeked to any location /* some JMFSecurity stuff */ private static JMFSecurity jmfSecurity = null; private static boolean securityPrivelege=false; private Method mSecurity[] = new Method[1]; private Class clSecurity[] = new Class[1]; private Object argsSecurity[][] = new Object[1][0]; private long startLocation = 0; static { try { jmfSecurity = JMFSecurityManager.getJMFSecurity(); securityPrivelege = true; } catch (SecurityException e) { } } /* Time is managed in few sets of variables (for different types of media), * each has it's own units: * durationNs - in nanoseconds * PTS - is 33 bits of the presentation time stamp value. * Upon the MPEG standard, it probably should be unsigned, * but since there are movies with negetive values, we will * treat the time stamp as SIGNED !! * AV...Ns - time for Audio/Video only streams, in nanoseconds * Important: every public method who return time, calculate the time * relative to the startPTS ! */ /** content duration in NS **/ private Time durationNs = Duration.DURATION_UNKNOWN; /** last seek time **/ private Time lastSetPositionTime = new Time(0L);