org.monte.media.anim

Class ANIMDecoder

java.lang.Object

org.monte.media.anim.ANIMDecoder

All Implemented Interfaces:

IFFVisitor

public class ANIMDecoder
extends Object
implements IFFVisitor

Decodes IFF files and adds the data to an ANIMMovieTrack.

Version:

2.3 2011-07-21 Treats CMAP specially if OCS chip set is detected.
2.1 2010-04-11 Adds support for CCRT color cycling.
2.1 2010-01-22 Adds support for CRNG color cycling.
2.0 2009-12-25 Treat an ILBM file as an animation with a single frame.
1.3 2009-12-24 Added support for CRNG color cycling.
1.2.1 2006-09-30 Decode CMAP even if it is too big or too small for the number of bitplanes used of the animation.
1.2 2003-04-21 Decode ANFI revised.
1.0 2003-04-03 Support for ANIM+SLA (Animations with Statically Loaded Audio) files added.
1.0 1999-10-19

Author:

Werner Randelshofer, Hausmatt 10, CH-6405 Goldau, Switzerland

Field Summary

Fields

Modifier and Type	Field and Description
static int	A2024_MONITOR_ID A2024, 60fps (I don't know the real value).
static int	DBLNTSC_MONITOR_ID DBLNTSC, 58fps, 44:52.
static int	DBLPAL_MONITOR_ID DBLPAL, 48fps, 44:44.
static int	DEFAULT_MONITOR_ID Default ID chooses a system dependent screen mode.
protected static int	EHB_MODE
static int	EURO36_MONITOR_ID EURO36, 73fps, 44:44.
static int	EURO72_MONITOR_ID EURO72, 69fps, 44:44.
protected static int	HAM_MODE
protected static int	MODE_MASK
static int	MONITOR_ID_MASK CAMG monitor ID mask.
static int	MULTISCAN_MONITOR_ID MULTISCAN (VGA), 58fps, 44:44.
static int	NTSC_MONITOR_ID NTSC, 60fps, 44:52.
static int	PAL_MONITOR_ID PAL, 50fps, 44:44.
static int	PROTO_MONITOR_ID PROTO, 60fps (I don't know the real value).
static int	SUPER72_MONITOR_ID SUPER72, 71fps, 34:40.

Constructor Summary

Constructors

Constructor and Description
ANIMDecoder(InputStream inputStream)
ANIMDecoder(URL location)

Method Summary

Methods

Modifier and Type	Method and Description
protected void	decodeANNO(IFFChunk[] chunks, ANIMMovieTrack track)
protected void	decodeAUTH(IFFChunk[] chunks, ANIMMovieTrack track)
protected void	decodeCCRT(IFFChunk chunk, ANIMMovieTrack track) Decodes the color cycling range and timing chunk (ILBM CCRT).
protected void	decodeColorCycling(IFFChunk[] ccrtChunks, IFFChunk[] crngChunks, IFFChunk[] drngChunks, ANIMMovieTrack track) Process CRNG and DRNG chunks in the sequence of their location in the file.
protected void	decodeCOPYRIGHT(IFFChunk[] chunks, ANIMMovieTrack track)
protected void	decodeCRNG(IFFChunk chunk, ANIMMovieTrack track) Decodes the color range cycling (ILBM CRNG).
protected void	decodeDRNG(IFFChunk chunk, ANIMMovieTrack track) Decodes the DPaint IV enhanced color cycle chunk (ILBM DRNG)
void	enterGroup(IFFChunk chunk)
void	leaveGroup(IFFChunk chunk)
void	produce(ANIMMovieTrack track, int n, boolean loadAudio) Decodes the stream and produces animation frames into the specified movie track.
void	registerChunks(IFFParser iff, boolean loadAudio)
void	visitChunk(IFFChunk group, IFFChunk chunk)

Methods inherited from class java.lang.Object

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

Field Detail

MONITOR_ID_MASK

public static final int MONITOR_ID_MASK

CAMG monitor ID mask.

See Also:

Constant Field Values

DEFAULT_MONITOR_ID

public static final int DEFAULT_MONITOR_ID

Default ID chooses a system dependent screen mode. We always fall back to NTSC OCS with 60fps. The default monitor ID triggers OCS mode! OCS stands for "Original Chip Set". The OCS chip set only had 4 bits per color register. All later chip sets hat 8 bits per color register.

See Also:

Constant Field Values

NTSC_MONITOR_ID

public static final int NTSC_MONITOR_ID

NTSC, 60fps, 44:52.

See Also:

Constant Field Values

PAL_MONITOR_ID

public static final int PAL_MONITOR_ID

PAL, 50fps, 44:44.

See Also:

Constant Field Values

MULTISCAN_MONITOR_ID

public static final int MULTISCAN_MONITOR_ID

MULTISCAN (VGA), 58fps, 44:44.

See Also:

Constant Field Values

A2024_MONITOR_ID

public static final int A2024_MONITOR_ID

A2024, 60fps (I don't know the real value).

See Also:

Constant Field Values

PROTO_MONITOR_ID

public static final int PROTO_MONITOR_ID

PROTO, 60fps (I don't know the real value).

See Also:

Constant Field Values

EURO72_MONITOR_ID

public static final int EURO72_MONITOR_ID

EURO72, 69fps, 44:44.

See Also:

Constant Field Values

EURO36_MONITOR_ID

public static final int EURO36_MONITOR_ID

EURO36, 73fps, 44:44.

See Also:

Constant Field Values

SUPER72_MONITOR_ID

public static final int SUPER72_MONITOR_ID

SUPER72, 71fps, 34:40.

See Also:

Constant Field Values

DBLNTSC_MONITOR_ID

public static final int DBLNTSC_MONITOR_ID

DBLNTSC, 58fps, 44:52.

See Also:

Constant Field Values

DBLPAL_MONITOR_ID

public static final int DBLPAL_MONITOR_ID

DBLPAL, 48fps, 44:44.

See Also:

Constant Field Values

MODE_MASK

protected static final int MODE_MASK

See Also:

Constant Field Values

HAM_MODE

protected static final int HAM_MODE

See Also:

Constant Field Values

EHB_MODE

protected static final int EHB_MODE

See Also:

Constant Field Values

Constructor Detail

ANIMDecoder

public ANIMDecoder(InputStream inputStream)

ANIMDecoder

public ANIMDecoder(URL location)

Method Detail

produce

public void produce(ANIMMovieTrack track,
           int n,
           boolean loadAudio)
             throws IOException

Decodes the stream and produces animation frames into the specified movie track. Reads the n-th ANIM chunk out of the IFF-file.

Parameters:

track - The decoded data is stored in this track.

n - The index of the ANIM FORM to be read out of the IFF-File

loadAudio - If this is set to false, audio data will be skipped.

Throws:

IOException

registerChunks

public void registerChunks(IFFParser iff,
                  boolean loadAudio)

enterGroup

public void enterGroup(IFFChunk chunk)

Specified by:

enterGroup in interface IFFVisitor

leaveGroup

public void leaveGroup(IFFChunk chunk)

Specified by:

leaveGroup in interface IFFVisitor

visitChunk

public void visitChunk(IFFChunk group,
              IFFChunk chunk)
                throws ParseException,
                       AbortException

Specified by:

visitChunk in interface IFFVisitor

Throws:

ParseException

AbortException

decodeCCRT

protected void decodeCCRT(IFFChunk chunk,
              ANIMMovieTrack track)
                   throws ParseException

Decodes the color cycling range and timing chunk (ILBM CCRT).

 enum {
     dontCycle = 0, forward = 1, backwards = -1
 } ccrtDirection;
 typedef struct {
   WORD enum ccrtDirection direction;  // 0=don't cycle, 1=forward, -1=backwards
   UBYTE start;      // range lower
   UBYTE end;        // range upper
   ULONG  seconds;    // seconds between cycling
   ULONG  microseconds; // msecs between cycling
   WORD  pad;        // future exp - store 0 here
 } ilbmColorCyclingRangeAndTimingChunk;
 

Throws:

ParseException

decodeCRNG

protected void decodeCRNG(IFFChunk chunk,
              ANIMMovieTrack track)
                   throws ParseException

Decodes the color range cycling (ILBM CRNG).

 #define RNG_NORATE  36   // Dpaint uses this rate to mean non-active
  set {
  active = 1, reverse = 2
  } crngActive;

  // A CRange is store in a CRNG chunk.
  typedef struct {
  WORD  pad1;              // reserved for future use; store 0 here *
  WORD  rate;              // 60/sec=16384, 30/sec=8192, 1/sec=16384/60=273
  WORD set crngActive flags;     // bit0 set = active, bit 1 set = reverse
  UBYTE low; UBYTE high;         // lower and upper color registers selected
  } ilbmColorRegisterRangeChunk;
 

Throws:

ParseException

decodeDRNG

protected void decodeDRNG(IFFChunk chunk,
              ANIMMovieTrack track)
                   throws ParseException

Decodes the DPaint IV enhanced color cycle chunk (ILBM DRNG)

The RNG_ACTIVE flag is set when the range is cyclable. A range should only have the RNG _ACTIVE if it:

1. contains at least one color register
2. has a defined rate
3. has more than one color and/or color register

 ILBM DRNG DPaint IV enhanced color cycle chunk
 --------------------------------------------

 set {
     RNG_ACTIVE=1,RNG_DP_RESERVED=4
 } drngFlags;

 /* True color cell * /
 typedef struct {
     UBYTE cell;
     UBYTE r;
     UBYTE g;
     UBYTE b;
 } ilbmDRNGDColor;

 /* Color register cell * /
 typedef struct {
     UBYTE cell;
     UBYTE index;
 } ilbmDRNGDIndex;

 /* DRNG chunk. * /
 typedef struct {
     UBYTE min; /* min cell value * /
     UBYTE max; /* max cell value * /
     UWORD rate; /* color cycling rate, 16384 = 60 steps/second * /
     UWORD set drngFlags flags; /* 1=RNG_ACTIVE, 4=RNG_DP_RESERVED * /
     UBYTE ntrue; /* number of DColorCell structs to follow * /
     UBYTE ntregs; /* number of DIndexCell structs to follow * /
     ilbmDRNGDColor[ntrue] trueColorCells;
     ilbmDRNGDIndex[ntregs] colorRegisterCells;
 } ilbmDRangeChunk;
 

Throws:

ParseException

decodeColorCycling

protected void decodeColorCycling(IFFChunk[] ccrtChunks,
                      IFFChunk[] crngChunks,
                      IFFChunk[] drngChunks,
                      ANIMMovieTrack track)
                           throws ParseException

Process CRNG and DRNG chunks in the sequence of their location in the file.

Throws:

ParseException

decodeCOPYRIGHT

protected void decodeCOPYRIGHT(IFFChunk[] chunks,
                   ANIMMovieTrack track)
                        throws ParseException

Throws:

ParseException

decodeAUTH

protected void decodeAUTH(IFFChunk[] chunks,
              ANIMMovieTrack track)
                   throws ParseException

Throws:

ParseException

decodeANNO

protected void decodeANNO(IFFChunk[] chunks,
              ANIMMovieTrack track)
                   throws ParseException

Throws:

ParseException