All Downloads are FREE. Search and download functionalities are using the official Maven repository.

be.tarsos.dsp.io.PipedAudioStream Maven / Gradle / Ivy

There is a newer version: 2.4-1
Show newest version
/*
*      _______                       _____   _____ _____  
*     |__   __|                     |  __ \ / ____|  __ \ 
*        | | __ _ _ __ ___  ___  ___| |  | | (___ | |__) |
*        | |/ _` | '__/ __|/ _ \/ __| |  | |\___ \|  ___/ 
*        | | (_| | |  \__ \ (_) \__ \ |__| |____) | |     
*        |_|\__,_|_|  |___/\___/|___/_____/|_____/|_|     
*                                                         
* -------------------------------------------------------------
*
* TarsosDSP is developed by Joren Six at IPEM, University Ghent
*  
* -------------------------------------------------------------
*
*  Info: http://0110.be/tag/TarsosDSP
*  Github: https://github.com/JorenSix/TarsosDSP
*  Releases: http://0110.be/releases/TarsosDSP/
*  
*  TarsosDSP includes modified source code by various authors,
*  for credits and info, see README.
* 
*/

package be.tarsos.dsp.io;

import java.io.InputStream;

import be.tarsos.dsp.util.AudioResourceUtils;


/**
 * An audio file can be used to convert and read from. It uses libAV to convert
 * about any audio format to a one channel PCM stream of a chosen sample rate. There is 
 * support for movie files as well, the first audio channel is then used as input.
 * The resource is either a local file or a type of stream supported by libAV (e.g. HTTP streams);
 * 
 * For a list of audio decoders the following command is practical:
 * 
avconv -decoders | grep -E "^A" | sort
 

A... 8svx_exp             8SVX exponential
A... 8svx_fib             8SVX fibonacci
A... aac                  AAC (Advanced Audio Coding)
A... aac_latm             AAC LATM (Advanced Audio Coding LATM syntax)
...
 * 
*/ public class PipedAudioStream { //private final static Logger LOG = Logger.getLogger(PipedAudioStream.class.getName()); private final String resource; private static PipeDecoder pipeDecoder = new PipeDecoder(); public static void setDecoder(PipeDecoder decoder){ pipeDecoder = decoder; } private final PipeDecoder decoder; public PipedAudioStream(String resource){ this.resource = AudioResourceUtils.sanitizeResource(resource); decoder = pipeDecoder; } /** * Return a one channel, signed PCM stream of audio of a defined sample rate. * @param targetSampleRate The target sample stream. * @param startTimeOffset The start time offset. * @return An audio stream which can be used to read samples from. */ public TarsosDSPAudioInputStream getMonoStream(int targetSampleRate,double startTimeOffset){ return getMonoStream(targetSampleRate, startTimeOffset,-1); } private TarsosDSPAudioFormat getTargetFormat(int targetSampleRate){ return new TarsosDSPAudioFormat(targetSampleRate, 16, 1, true, false); } /** * Return a one channel, signed PCM stream of audio of a defined sample rate. * @param targetSampleRate The target sample stream. * @param startTimeOffset The start time offset. * @param numberOfSeconds the number of seconds to pipe. If negative the stream is processed until end of stream. * @return An audio stream which can be used to read samples from. */ public TarsosDSPAudioInputStream getMonoStream(int targetSampleRate, double startTimeOffset, double numberOfSeconds) { InputStream stream = null; stream = decoder.getDecodedStream(resource, targetSampleRate,startTimeOffset,numberOfSeconds); return new UniversalAudioInputStream(stream, getTargetFormat(targetSampleRate)); } }




© 2015 - 2024 Weber Informatics LLC | Privacy Policy