org.red5.codec.AudioCodec Maven / Gradle / Ivy
/*
* RED5 Open Source Media Server - https://github.com/Red5/ Copyright 2006-2023 by respective authors (see below). All rights reserved. Licensed under the Apache License, Version
* 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless
* required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific language governing permissions and limitations under the License.
*/
package org.red5.codec;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.Map;
import org.red5.io.utils.IOUtils;
/**
* Audio codecs that Red5 supports; which includes some RTMP-E specific codecs.
*
* @author Art Clarke
* @author Paul Gregoire ([email protected])
*/
public enum AudioCodec {
PCM((byte) 0) {
@Override
public String getMimeType() {
return "raw ";
}
}, // pcm raw
ADPCM((byte) 0x01) {
@Override
public String getMimeType() {
return "g722"; // XXX(paul) not sure if this is correct
}
}, // adpcm
MP3((byte) 0x02) {
@Override
public IAudioStreamCodec newInstance() {
return new MP3Audio();
}
@Override
public String getMimeType() {
return ".mp3";
}
}, // MP3 / .mp3 / mp3
PCM_LE((byte) 0x03), // pcm le
NELLY_MOSER_16K((byte) 0x04) {
@Override
public String getMimeType() {
return "NELL";
}
},
NELLY_MOSER_8K((byte) 0x05) {
@Override
public String getMimeType() {
return "NELL";
}
},
NELLY_MOSER((byte) 0x06) {
@Override
public String getMimeType() {
return "NELL";
}
}, // nelly moser legacy
PCM_ALAW((byte) 0x07) {
@Override
public String getMimeType() {
return "alaw";
}
}, // pcm alaw
PCM_MULAW((byte) 0x08) {
@Override
public String getMimeType() {
return "ulaw";
}
}, // pcm mulaw
ExHeader((byte) 0x09) {
@Override
public IAudioStreamCodec newInstance() {
return new ExtendedAudio(); // XXX(paul) will yield proper codec class after data parsing
}
@Override
public int getFourcc() {
return 9; // ExHd
}
@Override
public String getMimeType() {
return "ExHd";
}
}, // used to signal FOURCC mode
AAC((byte) 0x0a) {
@Override
public IAudioStreamCodec newInstance() {
return new AACAudio();
}
@Override
public String getMimeType() {
return "mp4a";
}
}, // AAC / mp4a / advanced audio codec
SPEEX((byte) 0x0b) {
@Override
public IAudioStreamCodec newInstance() {
return new SpeexAudio();
}
@Override
public String getMimeType() {
return "spx ";
}
}, // Speex / "spx " / speex
MP2((byte) 0x0c) {
@Override
public String getMimeType() {
return "mp2a";
}
}, // MP2 / mp2a / mpeg2 audio
OPUS((byte) 0x0d) {
@Override
public IAudioStreamCodec newInstance() {
return new OpusAudio();
}
@Override
public String getMimeType() {
return "Opus";
}
}, // Opus / opus
MP3_8K((byte) 0x0e) {
@Override
public IAudioStreamCodec newInstance() {
return new MP3Audio();
}
@Override
public String getMimeType() {
return ".mp3";
}
}, // mp3 8khz
//DEVICE_SPECIFIC((byte) 0x0f), // device specific (reserved)
L16((byte) 0x0f) {
@Override
public int getFourcc() {
return 15;
}
@Override
public String getMimeType() {
return "L16 ";
}
}, // L16 audio / XXX(paul) update logic that used 0x09 previously for L16
// RTMP-E specific that weren't already added previously
AC3((byte) 0x10) {
@Override
public IAudioStreamCodec newInstance() {
return new AC3Audio();
}
@Override
public String getMimeType() {
return "ac-3";
}
}, // AC3 / ac-3 / ac3
EAC3((byte) 0x11) {
@Override
public IAudioStreamCodec newInstance() {
return new EAC3Audio();
}
@Override
public String getMimeType() {
return "ec-3";
}
}, // EAC3 / ec-3 / eac3
FLAC((byte) 0x12) {
@Override
public IAudioStreamCodec newInstance() {
return new FLACAudio();
}
@Override
public String getMimeType() {
return "fLaC";
}
}; // FLAC / fLaC / flac
/**
* Codecs which have private / config data or type identifiers included.
*/
private final static EnumSet configured = EnumSet.of(AAC, AC3, EAC3, FLAC);
private final static Map map = new HashMap<>();
private byte id;
private int fourcc;
private String mimeType;
static {
for (AudioCodec codec : AudioCodec.values()) {
map.put(codec.id, codec);
}
}
private AudioCodec(byte id) {
this.id = id;
this.fourcc = IOUtils.makeFourcc(getMimeType());
}
/**
* Returns a new instance of the codec.
*
* @return codec implementation
*/
public IAudioStreamCodec newInstance() {
return null;
}
/**
* Returns back a numeric id for this codec, that happens to correspond to the numeric identifier that FLV will use for this codec.
*
* @return the codec id
*/
public byte getId() {
return id;
}
/**
* Returns back a four character code for this codec.
*
* @return the four character code
*/
public int getFourcc() {
return fourcc;
}
/**
* Returns the four character code for this codec.
*
* @return
*/
public String getMimeType() {
return mimeType;
}
/**
* Returns back the codec that corresponds to the given id.
*
* @param id
* the id
* @return the codec
*/
public static AudioCodec valueOfById(int id) {
return (AudioCodec) map.get((byte) id);
}
/**
* Returns back the codec that corresponds to the given four character code.
*
* @param fourcc
* the four character code
* @return the codec
*/
public static AudioCodec valueOfByFourCc(int fourcc) {
for (AudioCodec codec : AudioCodec.values()) {
if (codec.getFourcc() == fourcc) {
return codec;
}
}
return null;
}
public static EnumSet getConfigured() {
return configured;
}
} © 2015 - 2025 Weber Informatics LLC | Privacy Policy