Package org.xiph.speex
Class SpeexDecoder
java.lang.Object
org.xiph.speex.SpeexDecoder
Main Speex Decoder class.
This class decodes the given Speex packets into PCM 16bit samples.
Here's an example that decodes and recovers one Speex packet.
SpeexDecoder speexDecoder = new SpeexDecoder(); speexDecoder.processData(data, packetOffset, packetSize); byte[] decoded = new byte[speexDecoder.getProcessedBataByteSize()]; speexDecoder.getProcessedData(decoded, 0);
- Version:
- $Revision: 1.4 $
- Author:
- Jim Lawrence, helloNetwork.com, Marc Gimpel, Wimba S.A. (mgimpel@horizonwimba.com)
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Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionint
Returns the number of channels.int
getProcessedData
(byte[] data, int offset) Pull the decoded data out into a byte array at the given offset and returns the number of bytes processed and just read.int
getProcessedData
(short[] data, int offset) Pull the decoded data out into a short array at the given offset and returns tne number of shorts processed and just readint
Returns the number of bytes processed and ready to be read.int
Returns the sample rate.boolean
init
(int mode, int sampleRate, int channels, boolean enhanced) Initialise the Speex Decoder.void
processData
(boolean lost) This is where the actual decoding takes place.void
processData
(byte[] data, int offset, int len) This is where the actual decoding takes place
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Field Details
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VERSION
Version of the Speex Decoder- See Also:
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sampleRate
private int sampleRate -
channels
private int channels -
decodedData
private float[] decodedData -
outputData
private short[] outputData -
outputSize
private int outputSize -
bits
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decoder
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frameSize
private int frameSize
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Constructor Details
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SpeexDecoder
public SpeexDecoder()Constructor
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Method Details
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init
public boolean init(int mode, int sampleRate, int channels, boolean enhanced) Initialise the Speex Decoder.- Parameters:
mode
- the mode of the decoder (0=NB, 1=WB, 2=UWB).sampleRate
- the number of samples per second.channels
- the number of audio channels (1=mono, 2=stereo, ...).enhanced
- whether to enable perceptual enhancement or not.- Returns:
- true if initialisation successful.
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getSampleRate
public int getSampleRate()Returns the sample rate.- Returns:
- the sample rate.
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getChannels
public int getChannels()Returns the number of channels.- Returns:
- the number of channels.
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getProcessedData
public int getProcessedData(byte[] data, int offset) Pull the decoded data out into a byte array at the given offset and returns the number of bytes processed and just read.- Parameters:
data
-offset
-- Returns:
- the number of bytes processed and just read.
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getProcessedData
public int getProcessedData(short[] data, int offset) Pull the decoded data out into a short array at the given offset and returns tne number of shorts processed and just read- Parameters:
data
-offset
-- Returns:
- the number of samples processed and just read.
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getProcessedDataByteSize
public int getProcessedDataByteSize()Returns the number of bytes processed and ready to be read.- Returns:
- the number of bytes processed and ready to be read.
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processData
This is where the actual decoding takes place- Parameters:
data
- - the Speex data (frame) to decode. If it is null, the packet is supposed lost.offset
- - the offset from which to start reading the data.len
- - the length of data to read (Speex frame size).- Throws:
StreamCorruptedException
- If the input stream is invalid.
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processData
This is where the actual decoding takes place.- Parameters:
lost
- - true if the Speex packet has been lost.- Throws:
StreamCorruptedException
- If the input stream is invalid.
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