org.jcodec.api.transcode

Class SourceImpl

java.lang.Object

org.jcodec.api.transcode.SourceImpl

All Implemented Interfaces:

PacketSource, Source

public class SourceImpl
extends Object
implements Source, PacketSource

A source producing uncompressed video/audio streams out of a compressed file. The buffers for the frames coming out of this source will be borrowed from a pixel store and must be returned to it for maximum efficiency.

Author:

Stanislav Vitvitskiy

Constructor Summary

Constructors

Constructor and Description
SourceImpl(String sourceName, Format inputFormat, Tuple._3<Integer,Integer,Codec> inputVideoCodec, Tuple._3<Integer,Integer,Codec> inputAudioCodec)

Method Summary

Modifier and Type	Method and Description
static JpegDecoder	createJpegDecoder(int downscale)
static MPEGDecoder	createMpegDecoder(int downscale)
static ProresDecoder	createProresDecoder(int downscale)
protected ByteBuffer	decodeAudio(ByteBuffer audioPkt)
Picture	decodeVideo(ByteBuffer data, Picture target1)
void	finish() Closes the input and flushes all the buffers related to this source.
AudioCodecMeta	getAudioCodecMeta() Gets the metadata about audio
DemuxerTrackMeta	getAudioMeta()
Tuple._3<Integer,Integer,Codec>	getInputAudioCode()
Tuple._3<Integer,Integer,Codec>	getIntputVideoCodec()
AudioFrameWithPacket	getNextAudioFrame() Gets the next decoded audio frame from this source
VideoFrameWithPacket	getNextVideoFrame() Gets the next video frame from this source
protected PixelStore.LoanerPicture	getPixelBuffer(ByteBuffer firstFrame) Returns a pixel buffer of a suitable size to hold the given video frame.
DemuxerTrackMeta	getTrackVideoMeta()
VideoCodecMeta	getVideoCodecMeta() Gets the metadata about video
boolean	haveAudio()
void	init(PixelStore pixelStore) Starts reading media data from the source.
void	initDemuxer()
Packet	inputAudioPacket()
Packet	inputVideoPacket()
boolean	isAudio()
boolean	isVideo()
void	seekFrames(int seekFrames) Skips some number of frames in this source
protected int	seekToKeyFrame(int frame) Seeks to a previous key frame prior or on the given frame, if the track is not seekable returns 0.
void	setOption(Options option, Object value)

Methods inherited from class java.lang.Object

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

Constructor Detail

SourceImpl

public SourceImpl(String sourceName,
                  Format inputFormat,
                  Tuple._3<Integer,Integer,Codec> inputVideoCodec,
                  Tuple._3<Integer,Integer,Codec> inputAudioCodec)

Method Detail

createMpegDecoder

public static MPEGDecoder createMpegDecoder(int downscale)

createProresDecoder

public static ProresDecoder createProresDecoder(int downscale)

initDemuxer

public void initDemuxer()
                 throws FileNotFoundException,
                        IOException

Throws:

FileNotFoundException

IOException

seekToKeyFrame

protected int seekToKeyFrame(int frame)
                      throws IOException

Seeks to a previous key frame prior or on the given frame, if the track is not seekable returns 0.

Parameters:

frame - A frame to seek

Returns:

Frame number of a key frame or 0 if the track is not seekable.

Throws:

IOException

inputVideoPacket

public Packet inputVideoPacket()
                        throws IOException

Specified by:

inputVideoPacket in interface PacketSource

Throws:

IOException

inputAudioPacket

public Packet inputAudioPacket()
                        throws IOException

Specified by:

inputAudioPacket in interface PacketSource

Throws:

IOException

getTrackVideoMeta

public DemuxerTrackMeta getTrackVideoMeta()

getAudioMeta

public DemuxerTrackMeta getAudioMeta()

haveAudio

public boolean haveAudio()

Specified by:

haveAudio in interface Source

finish

public void finish()

Description copied from interface: Source

Closes the input and flushes all the buffers related to this source.

Specified by:

finish in interface Source

init

public void init(PixelStore pixelStore)
          throws IOException

Description copied from interface: Source

Starts reading media data from the source.

Specified by:

init in interface Source

Parameters:

pixelStore - The pixel store where the buffers for the returned pictures will be borrowed from.

Throws:

IOException

decodeVideo

public Picture decodeVideo(ByteBuffer data,
                           Picture target1)

decodeAudio

protected ByteBuffer decodeAudio(ByteBuffer audioPkt)
                          throws IOException

Throws:

IOException

seekFrames

public void seekFrames(int seekFrames)
                throws IOException

Description copied from interface: Source

Skips some number of frames in this source

Specified by:

seekFrames in interface Source

Throws:

IOException

getPixelBuffer

protected PixelStore.LoanerPicture getPixelBuffer(ByteBuffer firstFrame)

Returns a pixel buffer of a suitable size to hold the given video frame. The video size is taken either from the video metadata or by analyzing the incoming video packet.

Parameters:

firstFrame -

Returns:

getVideoCodecMeta

public VideoCodecMeta getVideoCodecMeta()

Description copied from interface: Source

Gets the metadata about video

Specified by:

getVideoCodecMeta in interface Source

Returns:

getNextVideoFrame

public VideoFrameWithPacket getNextVideoFrame()
                                       throws IOException

Description copied from interface: Source

Gets the next video frame from this source

Specified by:

getNextVideoFrame in interface Source

Returns:

A picture holding the decoded frame, when the picture is not used it must be returned to the appropriate pixel store for the maximum efficiency.

Throws:

IOException

getNextAudioFrame

public AudioFrameWithPacket getNextAudioFrame()
                                       throws IOException

Description copied from interface: Source

Gets the next decoded audio frame from this source

Specified by:

getNextAudioFrame in interface Source

Returns:

The audio buffer containing PCM samples of the decoded audio and the audio format.

Throws:

IOException

getIntputVideoCodec

public Tuple._3<Integer,Integer,Codec> getIntputVideoCodec()

getInputAudioCode

public Tuple._3<Integer,Integer,Codec> getInputAudioCode()

setOption

public void setOption(Options option,
                      Object value)

Specified by:

setOption in interface Source

getAudioCodecMeta

public AudioCodecMeta getAudioCodecMeta()

Description copied from interface: Source

Gets the metadata about audio

Specified by:

getAudioCodecMeta in interface Source

Returns:

isVideo

public boolean isVideo()

Specified by:

isVideo in interface Source

isAudio

public boolean isAudio()

Specified by:

isAudio in interface Source

createJpegDecoder

public static JpegDecoder createJpegDecoder(int downscale)