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Java Source | 2000-09-28 | 5.4 KB | 141 lines | [TEXT/CWIE] |
- /*
- File: FileDJ.java
-
- Copyright: © Copyright 1999-2000 Apple Computer, Inc. All rights reserved.
-
- Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc.
- ("Apple") in consideration of your agreement to the following terms, and your
- use, installation, modification or redistribution of this Apple software
- constitutes acceptance of these terms. If you do not agree with these terms,
- please do not use, install, modify or redistribute this Apple software.
-
- In consideration of your agreement to abide by the following terms, and subject
- to these terms, Apple grants you a personal, non-exclusive license, under Apple’s
- copyrights in this original Apple software (the "Apple Software"), to use,
- reproduce, modify and redistribute the Apple Software, with or without
- modifications, in source and/or binary forms; provided that if you redistribute
- the Apple Software in its entirety and without modifications, you must retain
- this notice and the following text and disclaimers in all such redistributions of
- the Apple Software. Neither the name, trademarks, service marks or logos of
- Apple Computer, Inc. may be used to endorse or promote products derived from the
- Apple Software without specific prior written permission from Apple. Except as
- expressly stated in this notice, no other rights or licenses, express or implied,
- are granted by Apple herein, including but not limited to any patent rights that
- may be infringed by your derivative works or by other works in which the Apple
- Software may be incorporated.
-
- The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
- WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
- WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
- COMBINATION WITH YOUR PRODUCTS.
-
- IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
- GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION
- OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT
- (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN
- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
- Change History (most recent first):
-
- */
-
-
- package com.apple.jens.radio;
-
- import com.apple.jens.mp3.*;
- import java.io.*;
- import java.util.StringTokenizer;
-
-
- /** The FileDJ thread reads MP3 files selected by its MusicDirector
- and puts the contents into Buffers that can be streamed by Transmitters.
- */
- public class FileDJ extends DJ {
-
- public static final String kPropMusicLibrary = "FileDJ.music-library",
- kPropMusicDirector = "FileDJ.music-director",
- kPropMusicFilters = "FileDJ.music-filters";
-
-
- public void setStation( Station station ) {
- super.setStation(station);
- RadioProperties props = station.getProperties();
-
- MusicLibrary library = (MusicLibrary) props.getObjectProperty(kPropMusicLibrary);
- library.initialize(station);
-
- MusicDirector director = (MusicDirector) props.getObjectProperty(kPropMusicDirector);
- if( director == null )
- director = new SequentialMusicDirector(); // last-ditch default
- director.initialize(library,station);
- fIterator = director;
-
- // Parse a chain of MusicFilters that pipe through each other:
- String filters = props.getProperty(kPropMusicFilters);
- if( filters != null ) {
- StringTokenizer parser = new StringTokenizer(filters,"|,;: ");
- while( parser.hasMoreTokens() ) {
- MusicDirectorFilter filter = (MusicDirectorFilter) props.propertyValueToObject(
- kPropMusicDirector,
- parser.nextToken());
- if( filter != null ) {
- filter.initialize(fIterator,station);
- fIterator = filter;
- }
- }
- }
- }
-
-
- public MP3File getNextTrack( ) {
- return fIterator.getNextTrack();
- }
-
-
- protected void spin( ) throws IOException, InterruptedException {
- try{
- MP3File track = getNextTrack();
- if( track == null )
- throw new EOFException("MusicDirector finished"); // Causes thread's run loop to exit
- int bitRate = track.getBitRate();
- if( bitRate < 1000 ) throw new MP3Exception("Illegal bitrate "+bitRate);
- LOG(1,"Now playing \""+track.getTitle()+"\" by "+track.getArtist()
- +" (\""+track.getName()+"\", "+(bitRate/1000)+"kbps)");
- FileInputStream in = new FileInputStream(track);
-
- Throttle throttle = new Throttle(getName());
-
- try{
- while(true) {
- Buffer nextBuf = getNextFreeBuffer();
- LOG(2,"Loading "+nextBuf+" from "+track+"...");
- if( ! nextBuf.readFrom(in,bitRate) ) // Will block for a while (file input)
- break;
- LOG(2,"...done loading "+nextBuf);
-
- // Don't go faster than the audio bitrate or I'll overtake all the Transmitters:
- throttle.addTime( (long)nextBuf.getLength()*8000/bitRate );
- }
- }finally{
- in.close();
- }
- }catch( IOException x ) {
- Radio.WARN(1,this,"Caught an IOException, skipping to next track:");
- x.printStackTrace(System.err);
- }catch( MP3Exception x ) {
- Radio.WARN(1,this,"Caught an MP3Exception, skipping to next track:");
- x.printStackTrace(System.err);
- }
- }
-
-
- // INSTANCE DATA:
-
-
- private MusicIterator fIterator;
-
- }
-