org.jcodec.codecs.h264.decode.aso

Class SliceGroupMapBuilder

java.lang.Object

org.jcodec.codecs.h264.decode.aso.SliceGroupMapBuilder

public class SliceGroupMapBuilder
extends Object

This class is part of JCodec ( www.jcodec.org ) This software is distributed under FreeBSD License A helper class that builds macroblock to slice group maps needed by ASO (Arbitrary Slice Order)

Author:

The JCodec project

Constructor Summary

Constructors

Constructor and Description
SliceGroupMapBuilder()

Method Summary

Modifier and Type	Method and Description
static int[]	buildBoxOutMap(int picWidthInMbs, int picHeightInMbs, boolean changeDirection, int numberOfMbsInBox) A boxout macroblock to slice group mapping.
static int[]	buildDispersedMap(int picWidthInMbs, int picHeightInMbs, int numSliceGroups) A dispersed map.
static int[]	buildForegroundMap(int picWidthInMbs, int picHeightInMbs, int numSliceGroups, int[] topLeftAddr, int[] bottomRightAddr) A foreground macroblock to slice group map.
static int[]	buildInterleavedMap(int picWidthInMbs, int picHeightInMbs, int[] runLength) Interleaved slice group map.
static int[]	buildRasterScanMap(int picWidthInMbs, int picHeightInMbs, int sizeOfUpperLeftGroup, boolean changeDirection) A macroblock to slice group map that fills frame in raster scan.
static int[]	buildWipeMap(int picWidthInMbs, int picHeightInMbs, int sizeOfUpperLeftGroup, boolean changeDirection) A macroblock to slice group map that fills frame column by column

Methods inherited from class java.lang.Object

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

Constructor Detail

SliceGroupMapBuilder

public SliceGroupMapBuilder()

Method Detail

buildInterleavedMap

public static int[] buildInterleavedMap(int picWidthInMbs,
                                        int picHeightInMbs,
                                        int[] runLength)

Interleaved slice group map. Each slice group fills a number of cells equal to the appropriate run length, then followed by the next slice group. Example: 1, 1, 1, 1, 2, 2, 2, 1, 1, 1, 1, 2, 2, 2, 1, 1, 1, 1, 2, 2, 2, 1, 1, 1,

buildDispersedMap

public static int[] buildDispersedMap(int picWidthInMbs,
                                      int picHeightInMbs,
                                      int numSliceGroups)

A dispersed map. Every odd line starts from the (N / 2)th group Example: 0, 1, 2, 3, 0, 1, 2, 3 2, 3, 0, 1, 2, 3, 0, 1 0, 1, 2, 3, 0, 1, 2, 3 2, 3, 0, 1, 2, 3, 0, 1 0, 1, 2, 3, 0, 1, 2, 3 2, 3, 0, 1, 2, 3, 0, 1 0, 1, 2, 3, 0, 1, 2, 3 2, 3, 0, 1, 2, 3, 0, 1 0, 1, 2, 3, 0, 1, 2, 3 2, 3, 0, 1, 2, 3, 0, 1

buildForegroundMap

public static int[] buildForegroundMap(int picWidthInMbs,
                                       int picHeightInMbs,
                                       int numSliceGroups,
                                       int[] topLeftAddr,
                                       int[] bottomRightAddr)

A foreground macroblock to slice group map. Macroblocks of the last slice group are the background, all the others represent rectangles covering areas with top-left corner specified by topLeftAddr[group] and bottom right corner specified by bottomRightAddr[group].

Parameters:

picWidthInMbs -

picHeightInMbs -

numSliceGroups - Total number of slice groups

topLeftAddr - Addresses of macroblocks that are top-left corners of respective slice groups

bottomRightAddr - Addresses macroblocks that are bottom-right corners of respective slice groups

Returns:

buildBoxOutMap

public static int[] buildBoxOutMap(int picWidthInMbs,
                                   int picHeightInMbs,
                                   boolean changeDirection,
                                   int numberOfMbsInBox)

A boxout macroblock to slice group mapping. Only applicable when there's exactly 2 slice groups. Slice group 1 is a background, while slice group 0 is a box in the middle of the frame.

Parameters:

picWidthInMbs -

picHeightInMbs -

changeDirection -

numberOfMbsInBox - number of macroblocks in slice group 0

Returns:

buildRasterScanMap

public static int[] buildRasterScanMap(int picWidthInMbs,
                                       int picHeightInMbs,
                                       int sizeOfUpperLeftGroup,
                                       boolean changeDirection)

A macroblock to slice group map that fills frame in raster scan.

Parameters:

picWidthInMbs -

picHeightInMbs -

sizeOfUpperLeftGroup -

changeDirection -

Returns:

buildWipeMap

public static int[] buildWipeMap(int picWidthInMbs,
                                 int picHeightInMbs,
                                 int sizeOfUpperLeftGroup,
                                 boolean changeDirection)

A macroblock to slice group map that fills frame column by column

Parameters:

picWidthInMbs -

picHeightInMbs -

sizeOfUpperLeftGroup -

changeDirection -

Returns: