Package javaforce.voip.codec

Class speex

java.lang.Object
javaforce.voip.codec.speex
All Implemented Interfaces:
RTPAudioCoder
public class speex extends Object implements RTPAudioCoder
Encodes/decodes speex packets. RFC 5574

  • Constructor Summary

    Constructors
    Constructor
    Description
    speex(RTP rtp, int rate)
     

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    close()
    Free any resources.
    short[]
    decode(byte[] encoded, int off, int length)
    Decodes RTP packet into audio samples.
    byte[]
    encode(short[] samples)
    Encodes audio samples into RTP packet.
    int
    getPacketSize()
    Returns encoded packet size (excluding RTP header) -1 = variable sized
    int
    getSampleRate()
    Returns sample rate.
    static void
    main(String[] args)
     
    speex
    setEnhancedMode(boolean mode)
    Set decoder enhanced mode.
    void
    setid(int id)
    Sets RTP payload ID.
    speex
    setQuality(int value)
    Set encoder quality (0-10) Default = 5.
    static void
    speex_dsp_denoise(long ctx, short[] audio)
    Performs denoise function.
    static void
    speex_dsp_echo(long ctx, short[] audio_mic, short[] audio_spk, short[] audio_out)
    Performs echo cancellation.
    static long
    speex_dsp_init(int sample_rate)
    Allocate speex DSP context.
    static long
    speex_dsp_init(int sample_rate, int echo_buffers)
    Allocate speex DSP context.
    static void
    speex_dsp_uninit(long ctx)
    Free speex DSP context
    static void
    speexdspdenoise(long ctx, short[] audio)
     
    static void
    speexdspecho(long ctx, short[] audio_mic, short[] audio_spk, short[] audio_out)
     
    static void
    speexdspuninit(long ctx)
     

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • speex

      public speex(RTP rtp, int rate)

  • Method Details

    • setid

      public void setid(int id)
      Description copied from interface: RTPAudioCoder
      Sets RTP payload ID. This value is exchanged in SDP packets. For most audio codecs this value is fixed and ignored.
      Specified by:
      setid in interface RTPAudioCoder

    • getPacketSize

      public int getPacketSize()
      Description copied from interface: RTPAudioCoder
      Returns encoded packet size (excluding RTP header) -1 = variable sized
      Specified by:
      getPacketSize in interface RTPAudioCoder

    • setQuality

      public speex setQuality(int value)
      Set encoder quality (0-10) Default = 5. Affects only new speex instances.

    • setEnhancedMode

      public speex setEnhancedMode(boolean mode)
      Set decoder enhanced mode. Default = false Affects only new speex instances.

    • encode

      public byte[] encode(short[] samples)
      Description copied from interface: RTPAudioCoder
      Encodes audio samples into RTP packet.
      Specified by:
      encode in interface RTPAudioCoder

    • decode

      public short[] decode(byte[] encoded, int off, int length)
      Description copied from interface: RTPAudioCoder
      Decodes RTP packet into audio samples.
      Specified by:
      decode in interface RTPAudioCoder

    • getSampleRate

      public int getSampleRate()
      Description copied from interface: RTPAudioCoder
      Returns sample rate.
      Specified by:
      getSampleRate in interface RTPAudioCoder

    • speex_dsp_init

      public static long speex_dsp_init(int sample_rate)
      Allocate speex DSP context. Audio buffers should be 160 samples. NOTE : speex SDP functions do NOT require the use of speex codec.
      Parameters:
      sample_rate - = sample rate
      Returns:
      ctx

    • speex_dsp_init

      public static long speex_dsp_init(int sample_rate, int echo_buffers)
      Allocate speex DSP context. Audio buffers should be 160 samples (50 per second, 20ms each). NOTE : speex SDP functions do NOT require the use of speex codec.
      Parameters:
      sample_rate - = sample rate
      echo_buffers - = # of buffers to allocate for echo cancellation (-1=default of 10)
      Returns:
      ctx

    • speexdspuninit

      public static void speexdspuninit(long ctx)

    • speex_dsp_uninit

      public static void speex_dsp_uninit(long ctx)
      Free speex DSP context
      Parameters:
      ctx - = speex context

    • speexdspdenoise

      public static void speexdspdenoise(long ctx, short[] audio)

    • speex_dsp_denoise

      public static void speex_dsp_denoise(long ctx, short[] audio)
      Performs denoise function.
      Parameters:
      ctx - = speex context
      audio - = audio samples

    • speexdspecho

      public static void speexdspecho(long ctx, short[] audio_mic, short[] audio_spk, short[] audio_out)

    • speex_dsp_echo

      public static void speex_dsp_echo(long ctx, short[] audio_mic, short[] audio_spk, short[] audio_out)
      Performs echo cancellation.
      Parameters:
      ctx - = speex context
      audio_mic - = mic audio (modified)
      audio_out - = outbound audio (not modified)

    • main

      public static void main(String[] args)

    • close

      public void close()
      Description copied from interface: RTPAudioCoder
      Free any resources.
      Specified by:
      close in interface RTPAudioCoder