/*
* Java port of ogg demultiplexer.
* Copyright (c) 2004 Jonathan Hueber.
*
* License conditions are the same as OggVorbis. See README.
* 1a39e335700bec46ae31a38e2156a898
*/
/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* by the XIPHOPHORUS Company http://www.xiph.org/ *
* *
********************************************************************/
package net.sourceforge.jffmpeg.demux.ogg;
import java.io.*;
import java.net.URL;
import java.util.HashMap;
import javax.media.Demultiplexer;
import javax.media.protocol.Positionable;
import javax.media.protocol.Seekable;
import javax.media.Time;
import javax.media.protocol.ContentDescriptor;
import javax.media.protocol.FileTypeDescriptor;
import javax.media.Track;
import javax.media.protocol.DataSource;
import javax.media.protocol.PullDataSource;
import javax.media.protocol.PullSourceStream;
import javax.media.MediaLocator;
import javax.media.BadHeaderException;
import javax.media.Buffer;
import java.util.Iterator;
/**
*/
public class OggDemux implements Demultiplexer, Positionable {
public static final int MAX_OGG_PAGE_SIZE = 65307;
/**
* Input and output streams
*/
private PullSourceStream in;
private Seekable seek;
/**
* Output Track
*/
private int TRACK_SERIAL = 1;
private Track audioTrack = new AudioTrack( this, TRACK_SERIAL );
/**
* Timing information
*/
private long currentTime;
private long duration;
/** Create the OGG Demultiplexer */
public OggDemux() {
}
public void open() throws javax.media.ResourceUnavailableException {
}
public void reset() {
}
public void close() {
}
public synchronized void start() throws java.io.IOException {
}
public void stop() {
}
public Object getControl( String control ) {
return null;
}
public Object[] getControls() {
return new Object[0];
}
public Time getDuration() {
return new Time( duration );
}
public Time getMediaTime() {
return new Time( currentTime );
}
public String getName() {
return "OGG Demultiplexer";
}
public ContentDescriptor[] getSupportedInputContentDescriptors() {
return new ContentDescriptor[] {
new FileTypeDescriptor( "audio.ogg" )
};
}
public Track[] getTracks() throws IOException, BadHeaderException {
return new Track[] { audioTrack };
}
public boolean isPositionable() {
return true;
}
public boolean isRandomAccess() {
return true;
}
public Time setPosition( javax.media.Time newTime, int parameter ) {
seekPacket( (int)(newTime.getNanoseconds()/(1000000000 / 44100)), 1 );
return getMediaTime();
}
public void setSource( DataSource inputDataSource ) throws java.io.IOException, javax.media.IncompatibleSourceException {
if ( inputDataSource instanceof PullDataSource ) {
in = ((PullDataSource)inputDataSource).getStreams()[0];
if ( in instanceof Seekable
&& in.getContentLength() != in.LENGTH_UNKNOWN) {
seek = (Seekable)in;
/* Find duration */
seekPacket( -1, 1 );
duration = lastGranuleNumber * (1000000000 / 44100);
// System.out.println( "Duration: " + (duration/1000000000) );
seekPacket( 0, 1 );
}
return;
}
throw new javax.media.IncompatibleSourceException();
}
byte[] buffer;
protected void readFrame( Buffer output, int serial,
long sampleDuration ) throws IOException {
output.setEOM( false );
if ( currentTime == duration && seek != null && lastPacketPosition > 0 ) {
if ( seek.tell() >= lastPacketPosition ) {
output.setEOM( true );
output.setLength( 0 );
return;
}
}
/* Extract buffer */
buffer = (byte[])output.getData();
if ( buffer == null || buffer.length < MAX_OGG_PAGE_SIZE ) {
buffer = new byte[ MAX_OGG_PAGE_SIZE ];
output.setData( buffer );
}
/* Read header */
readBytes( 0, 27 );
/* Capture Pattern */
if ( buffer[ 0 ] != 'O'
|| buffer[ 1 ] != 'g'
|| buffer[ 2 ] != 'g'
|| buffer[ 3 ] != 'S' ) {
throw new IOException( "Invalid Capture Pattern: "
+ new String( buffer, 0, 4 ) );
}
int stream_structure_version = buffer[ 4 ] & 0xff;
int header_type_flag = buffer[ 5 ] & 0xff; // EOS/BOS
long absolute_granulePosition = readLong( buffer, 6 );
int stream_serial_number = readInt( buffer, 14 );
int page_sequence_number = readInt( buffer, 18 );
int page_checksum = readInt( buffer, 22 );
int page_segments = buffer[ 26 ] & 0xff;
readBytes( 27, page_segments );
int bodyLength = 0;
for ( int i = 0; i < page_segments; i++ ) {
bodyLength += buffer[ 27 + i ] & 0xff;
}
readBytes( 27 + page_segments, bodyLength );
int packetSize = 27 + page_segments + bodyLength;
/* Checksum */
buffer[ 22 ] = 0;
buffer[ 23 ] = 0;
buffer[ 24 ] = 0;
buffer[ 25 ] = 0;
int crc = 0;
for( int i = 0; i < packetSize; i++) {
crc = (crc<<8)^crc_lookup[(((int)(crc >> 24))^buffer[i])&0xff];
}
if ( page_checksum != crc ) {
throw new IOException( "Invalid CRC " + crc + "/" + page_checksum );
}
/* Return packet */
currentTime = absolute_granulePosition * sampleDuration;
output.setLength( packetSize );
output.setTimeStamp( currentTime );
}
private static final int[] crc_lookup = new int[] {
0x00000000,0x04c11db7,0x09823b6e,0x0d4326d9,
0x130476dc,0x17c56b6b,0x1a864db2,0x1e475005,
0x2608edb8,0x22c9f00f,0x2f8ad6d6,0x2b4bcb61,
0x350c9b64,0x31cd86d3,0x3c8ea00a,0x384fbdbd,
0x4c11db70,0x48d0c6c7,0x4593e01e,0x4152fda9,
0x5f15adac,0x5bd4b01b,0x569796c2,0x52568b75,
0x6a1936c8,0x6ed82b7f,0x639b0da6,0x675a1011,
0x791d4014,0x7ddc5da3,0x709f7b7a,0x745e66cd,
0x9823b6e0,0x9ce2ab57,0x91a18d8e,0x95609039,
0x8b27c03c,0x8fe6dd8b,0x82a5fb52,0x8664e6e5,
0xbe2b5b58,0xbaea46ef,0xb7a96036,0xb3687d81,
0xad2f2d84,0xa9ee3033,0xa4ad16ea,0xa06c0b5d,
0xd4326d90,0xd0f37027,0xddb056fe,0xd9714b49,
0xc7361b4c,0xc3f706fb,0xceb42022,0xca753d95,
0xf23a8028,0xf6fb9d9f,0xfbb8bb46,0xff79a6f1,
0xe13ef6f4,0xe5ffeb43,0xe8bccd9a,0xec7dd02d,
0x34867077,0x30476dc0,0x3d044b19,0x39c556ae,
0x278206ab,0x23431b1c,0x2e003dc5,0x2ac12072,
0x128e9dcf,0x164f8078,0x1b0ca6a1,0x1fcdbb16,
0x018aeb13,0x054bf6a4,0x0808d07d,0x0cc9cdca,
0x7897ab07,0x7c56b6b0,0x71159069,0x75d48dde,
0x6b93dddb,0x6f52c06c,0x6211e6b5,0x66d0fb02,
0x5e9f46bf,0x5a5e5b08,0x571d7dd1,0x53dc6066,
0x4d9b3063,0x495a2dd4,0x44190b0d,0x40d816ba,
0xaca5c697,0xa864db20,0xa527fdf9,0xa1e6e04e,
0xbfa1b04b,0xbb60adfc,0xb6238b25,0xb2e29692,
0x8aad2b2f,0x8e6c3698,0x832f1041,0x87ee0df6,
0x99a95df3,0x9d684044,0x902b669d,0x94ea7b2a,
0xe0b41de7,0xe4750050,0xe9362689,0xedf73b3e,
0xf3b06b3b,0xf771768c,0xfa325055,0xfef34de2,
0xc6bcf05f,0xc27dede8,0xcf3ecb31,0xcbffd686,
0xd5b88683,0xd1799b34,0xdc3abded,0xd8fba05a,
0x690ce0ee,0x6dcdfd59,0x608edb80,0x644fc637,
0x7a089632,0x7ec98b85,0x738aad5c,0x774bb0eb,
0x4f040d56,0x4bc510e1,0x46863638,0x42472b8f,
0x5c007b8a,0x58c1663d,0x558240e4,0x51435d53,
0x251d3b9e,0x21dc2629,0x2c9f00f0,0x285e1d47,
0x36194d42,0x32d850f5,0x3f9b762c,0x3b5a6b9b,
0x0315d626,0x07d4cb91,0x0a97ed48,0x0e56f0ff,
0x1011a0fa,0x14d0bd4d,0x19939b94,0x1d528623,
0xf12f560e,0xf5ee4bb9,0xf8ad6d60,0xfc6c70d7,
0xe22b20d2,0xe6ea3d65,0xeba91bbc,0xef68060b,
0xd727bbb6,0xd3e6a601,0xdea580d8,0xda649d6f,
0xc423cd6a,0xc0e2d0dd,0xcda1f604,0xc960ebb3,
0xbd3e8d7e,0xb9ff90c9,0xb4bcb610,0xb07daba7,
0xae3afba2,0xaafbe615,0xa7b8c0cc,0xa379dd7b,
0x9b3660c6,0x9ff77d71,0x92b45ba8,0x9675461f,
0x8832161a,0x8cf30bad,0x81b02d74,0x857130c3,
0x5d8a9099,0x594b8d2e,0x5408abf7,0x50c9b640,
0x4e8ee645,0x4a4ffbf2,0x470cdd2b,0x43cdc09c,
0x7b827d21,0x7f436096,0x7200464f,0x76c15bf8,
0x68860bfd,0x6c47164a,0x61043093,0x65c52d24,
0x119b4be9,0x155a565e,0x18197087,0x1cd86d30,
0x029f3d35,0x065e2082,0x0b1d065b,0x0fdc1bec,
0x3793a651,0x3352bbe6,0x3e119d3f,0x3ad08088,
0x2497d08d,0x2056cd3a,0x2d15ebe3,0x29d4f654,
0xc5a92679,0xc1683bce,0xcc2b1d17,0xc8ea00a0,
0xd6ad50a5,0xd26c4d12,0xdf2f6bcb,0xdbee767c,
0xe3a1cbc1,0xe760d676,0xea23f0af,0xeee2ed18,
0xf0a5bd1d,0xf464a0aa,0xf9278673,0xfde69bc4,
0x89b8fd09,0x8d79e0be,0x803ac667,0x84fbdbd0,
0x9abc8bd5,0x9e7d9662,0x933eb0bb,0x97ffad0c,
0xafb010b1,0xab710d06,0xa6322bdf,0xa2f33668,
0xbcb4666d,0xb8757bda,0xb5365d03,0xb1f740b4
};
private void readBytes( int offset, int n ) throws IOException {
int read = 0;
while (read < n) {
read += in.read( buffer, read + offset, n - read );
}
}
private long readLong( byte[] buffer, int offset ) {
long ret = 0;
ret = (ret << 8 ) | (buffer[ offset + 7 ] & 0xff);
ret = (ret << 8 ) | (buffer[ offset + 6 ] & 0xff);
ret = (ret << 8 ) | (buffer[ offset + 5 ] & 0xff);
ret = (ret << 8 ) | (buffer[ offset + 4 ] & 0xff);
ret = (ret << 8 ) | (buffer[ offset + 3 ] & 0xff);
ret = (ret << 8 ) | (buffer[ offset + 2 ] & 0xff);
ret = (ret << 8 ) | (buffer[ offset + 1 ] & 0xff);
ret = (ret << 8 ) | (buffer[ offset + 0 ] & 0xff);
return ret;
}
private int readInt( byte[] buffer, int offset ) {
int ret = 0;
ret = (ret << 8 ) | (buffer[ offset + 3 ] & 0xff);
ret = (ret << 8 ) | (buffer[ offset + 2 ] & 0xff);
ret = (ret << 8 ) | (buffer[ offset + 1 ] & 0xff);
ret = (ret << 8 ) | (buffer[ offset + 0 ] & 0xff);
return ret;
}
/* granuleNumber = 0 (seek to start)
* granuleNumber = -1 (seek to end)
*/
private long lastPacketPosition = -1;
private long lastGranuleNumber = 0;
protected void seekPacket( long granuleNumber, int serial ) {
if ( granuleNumber == 0 ) {
seek.seek( 0 );
return;
}
if ( granuleNumber == -1 ) {
if ( lastPacketPosition >= 0 ) {
seek.seek( lastPacketPosition );
return;
}
/* Very inefficient backward seek */
long end = seek.seek( in.getContentLength() );
Buffer lastPacket = new Buffer();
for ( long i = end - 4; i >= 0; i-- ) {
seek.seek( i );
try {
readFrame( lastPacket, serial, 1 );
lastPacketPosition = i;
lastGranuleNumber = lastPacket.getTimeStamp();
seek.seek( i );
return;
} catch (IOException e) {
} catch (IndexOutOfBoundsException e ) {
}
}
}
long chopLow = 0;
long chopHigh = lastPacketPosition;
long chopLast = 0;
/* TODO binary chop */
long chopThis = (lastPacketPosition * (granuleNumber - 1))/lastGranuleNumber;
Buffer guessedPacket = new Buffer();
for ( long i = chopThis; i >= 0; i-- ) {
seek.seek( i );
try {
readFrame( guessedPacket, serial, 1 );
// System.out.println( "Search " + granuleNumber + " found " + guessedPacket.getTimeStamp());
seek.seek( i );
return;
} catch (IOException e) {
} catch (IndexOutOfBoundsException e ) {
}
}
}
}