net.sourceforge.jaad.aac

Class Decoder

java.lang.Object

net.sourceforge.jaad.aac.Decoder

All Implemented Interfaces:

SyntaxConstants

public class Decoder
extends Object
implements SyntaxConstants

This class is part of JAAD ( jaadec.sourceforge.net ) that is distributed under the Public Domain license. Code changes provided by the JCodec project are distributed under FreeBSD license. Main AAC decoder class

Author:

in-somnia

Field Summary

Fields inherited from interface net.sourceforge.jaad.aac.syntax.SyntaxConstants

BYTE_MASK, ELEMENT_CCE, ELEMENT_CPE, ELEMENT_DSE, ELEMENT_END, ELEMENT_FIL, ELEMENT_LFE, ELEMENT_PCE, ELEMENT_SCE, MAX_ELEMENTS, MAX_LTP_SFB, MAX_MS_MASK, MAX_SECTIONS, MAX_WINDOW_COUNT, MAX_WINDOW_GROUP_COUNT, MIN_INPUT_SIZE, SQRT2, WINDOW_LEN_LONG, WINDOW_LEN_SHORT, WINDOW_SMALL_LEN_LONG, WINDOW_SMALL_LEN_SHORT

Constructor Summary

Constructors

Constructor and Description
Decoder(byte[] decoderSpecificInfo) Initializes the decoder with a MP4 decoder specific info.

Method Summary

Modifier and Type	Method and Description
static boolean	canDecode(Profile profile) The methods returns true, if a profile is supported by the decoder.
void	decodeFrame(byte[] frame, SampleBuffer buffer) Decodes one frame of AAC data in frame mode and returns the raw PCM data.
AACDecoderConfig	getConfig()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Decoder

public Decoder(byte[] decoderSpecificInfo)
        throws AACException

Initializes the decoder with a MP4 decoder specific info. After this the MP4 frames can be passed to the decodeFrame(byte[], SampleBuffer) method to decode them.

Parameters:

decoderSpecificInfo - a byte array containing the decoder specific info from an MP4 container

Throws:

AACException - if the specified profile is not supported

Method Detail

canDecode

public static boolean canDecode(Profile profile)

The methods returns true, if a profile is supported by the decoder.

Parameters:

profile - an AAC profile

Returns:

true if the specified profile can be decoded

See Also:

Profile.isDecodingSupported()

getConfig

public AACDecoderConfig getConfig()

decodeFrame

public void decodeFrame(byte[] frame,
                        SampleBuffer buffer)
                 throws AACException

Decodes one frame of AAC data in frame mode and returns the raw PCM data.

Parameters:

frame - the AAC frame

buffer - a buffer to hold the decoded PCM data

Throws:

AACException - if decoding fails