org.jitsi.impl.neomedia.codec.audio

Class FFmpegAudioEncoder

java.lang.Object

net.sf.fmj.media.AbstractControls

net.sf.fmj.media.AbstractPlugIn

net.sf.fmj.media.AbstractCodec

org.jitsi.impl.neomedia.codec.AbstractCodec2

org.jitsi.impl.neomedia.codec.audio.AbstractFFmpegAudioCodec

org.jitsi.impl.neomedia.codec.audio.FFmpegAudioEncoder

All Implemented Interfaces:

javax.media.Codec, javax.media.Controls, javax.media.PlugIn

Direct Known Subclasses:

JNIEncoder, JNIEncoder

public class FFmpegAudioEncoder
extends AbstractFFmpegAudioCodec

Implements an audio Codec using the FFmpeg library.

Author:

Lyubomir Marinov

Field Summary

Fields

Modifier and Type	Field and Description
protected int	prevInLen The length of the valid audio data in prevIn.

Fields inherited from class org.jitsi.impl.neomedia.codec.audio.AbstractFFmpegAudioCodec

avctx, codecID, frameSizeInBytes

Fields inherited from class org.jitsi.impl.neomedia.codec.AbstractCodec2

BUFFER_FLAG_FEC, BUFFER_FLAG_PLC, EMPTY_FORMATS, features, MAX_AUDIO_SEQUENCE_NUMBERS_TO_PLC, SEQUENCE_MAX, SEQUENCE_MIN

Fields inherited from class net.sf.fmj.media.AbstractCodec

inputFormat, inputFormats, opened, outputFormat

Fields inherited from interface javax.media.PlugIn

BUFFER_PROCESSED_FAILED, BUFFER_PROCESSED_OK, INPUT_BUFFER_NOT_CONSUMED, OUTPUT_BUFFER_NOT_FILLED, PLUGIN_TERMINATED

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	FFmpegAudioEncoder(String name, int codecID, javax.media.Format[] supportedOutputFormats) Initializes a new FFmpegAudioEncoder instance with a specific PlugIn name, a specific AVCodecID, and a specific list of Formats supported as output.

Method Summary

Modifier and Type	Method and Description
static void	assertFindAVCodec(int codecID) Asserts that an encoder with a specific AVCodecID is found by FFmpeg.
protected void	configureAVCodecContext(long avctx, javax.media.format.AudioFormat format) Configures the AVCodecContext initialized in AbstractFFmpegAudioCodec.doOpen() prior to invoking one of the FFmpeg functions in the avcodec_open family.
protected void	doClose()
protected int	doProcess(javax.media.Buffer inBuf, javax.media.Buffer outBuf)
protected long	findAVCodec(int codecID) Finds an AVCodec with a specific AVCodecID.
protected javax.media.format.AudioFormat	getAVCodecContextFormat() Gets the AudioFormat with which AbstractFFmpegAudioCodec.avctx is to be configured and opened by AbstractFFmpegAudioCodec.doOpen().

Methods inherited from class org.jitsi.impl.neomedia.codec.audio.AbstractFFmpegAudioCodec

codecIDToString, doOpen

Methods inherited from class org.jitsi.impl.neomedia.codec.AbstractCodec2

calculateLostSeqNoCount, close, discardOutputBuffer, getMatchingOutputFormats, getName, getSupportedOutputFormats, incrementSeqNo, matches, open, process, setInputFormat, setOutputFormat, specialize, updateOutput, validateByteArraySize, validateShortArraySize

Methods inherited from class net.sf.fmj.media.AbstractCodec

checkInputBuffer, dump, getInputFormat, getOutputFormat, getSupportedInputFormats, isEOM, propagateEOM

Methods inherited from class net.sf.fmj.media.AbstractPlugIn

reset

Methods inherited from class net.sf.fmj.media.AbstractControls

addControl, getControl, getControls, removeControl

Methods inherited from class java.lang.Object

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

Methods inherited from interface javax.media.PlugIn

reset

Methods inherited from interface javax.media.Controls

getControl, getControls

Field Detail

prevInLen

protected int prevInLen

The length of the valid audio data in prevIn.

Constructor Detail

FFmpegAudioEncoder

protected FFmpegAudioEncoder(String name,
                             int codecID,
                             javax.media.Format[] supportedOutputFormats)

Initializes a new FFmpegAudioEncoder instance with a specific PlugIn name, a specific AVCodecID, and a specific list of Formats supported as output.

Parameters:

name - the PlugIn name of the new instance

codecID - the AVCodecID of the FFmpeg codec to be represented by the new instance

supportedOutputFormats - the list of Formats supported by the new instance as output

Method Detail

assertFindAVCodec

public static void assertFindAVCodec(int codecID)

Asserts that an encoder with a specific AVCodecID is found by FFmpeg.

Parameters:

codecID - the AVCodecID of the encoder to find

Throws:

RuntimeException - if no encoder with the specified codecID is found by FFmpeg

configureAVCodecContext

protected void configureAVCodecContext(long avctx,
                                       javax.media.format.AudioFormat format)

Configures the AVCodecContext initialized in AbstractFFmpegAudioCodec.doOpen() prior to invoking one of the FFmpeg functions in the avcodec_open family. Allows extenders to override and provide additional, optional configuration.

Overrides:

configureAVCodecContext in class AbstractFFmpegAudioCodec

Parameters:

avctx - the AVCodecContext to configure

format - the AudioFormat with which avctx is being configured

doClose

protected void doClose()

Overrides:

doClose in class AbstractFFmpegAudioCodec

doProcess

protected int doProcess(javax.media.Buffer inBuf,
                        javax.media.Buffer outBuf)

Specified by:

doProcess in class AbstractCodec2

findAVCodec

protected long findAVCodec(int codecID)

Finds an AVCodec with a specific AVCodecID. The method is invoked by AbstractFFmpegAudioCodec.doOpen() in order to (eventually) open a new AVCodecContext.

Specified by:

findAVCodec in class AbstractFFmpegAudioCodec

Parameters:

codecID - the AVCodecID of the AVCodec to find

Returns:

an AVCodec with the specified codecID or 0

getAVCodecContextFormat

protected javax.media.format.AudioFormat getAVCodecContextFormat()

Gets the AudioFormat with which AbstractFFmpegAudioCodec.avctx is to be configured and opened by AbstractFFmpegAudioCodec.doOpen().

Specified by:

getAVCodecContextFormat in class AbstractFFmpegAudioCodec

Returns:

the AudioFormat with which avctx is to be configured and opened by doOpen()