org.monte.media.AbstractVideoCodecCore
org.monte.media.avi.TechSmithCodecCore
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Copyright 2012-04-26 Werner Randelshofer | ||||||||
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java.lang.Object
public class TechSmithCodecCore
TechSmithCodec (tscc) encodes a BufferedImage as a byte[] array.
This codec does not encode the color palette of an image. This must be done separately.
Supported input formats:
Format with BufferedImage.class, any width, any height,
depth=8,16 or 24.
Format with byte[].class, same width and height as input
format, depth=8,16 or 24.
Compression of a frame is performed in two steps: In the first, step a frame is compressed line by line from bottom to top. In the second step the resulting data is compressed again using zlib compression.
Apart from the second compression step and the support for 16- and 24-bit
data, this encoder is identical to the RunLengthCodec.
Each line of a frame is compressed individually. A line consists of two-byte op-codes optionally followed by data. The end of the line is marked with the EOL op-code.
The following op-codes are supported:
0x00 0x00
0x00 0x01
0x00 0x02 dx dy
dx and dy
indicate the horizontal and vertical offset from the current position.
dx and dy are unsigned 8-bit values.0x00 n pixel{n} 0x00?
n
gives the number of 8-, 16- or 24-bit pixels that follow.
n must be between 3 and 255.
If n is odd and 8-bit pixels are used, a pad byte with the value 0x00 must be
added.
n pixel
n
gives the number of times the given pixel is repeated. n must be
between 1 and 255.
Compressed data Expanded data 03 04 04 04 04 05 06 06 06 06 06 06 00 03 45 56 67 00 45 56 67 02 78 78 78 00 02 05 01 Move 5 right and 1 down 02 78 78 78 00 00 End of line 09 1E 1E 1E 1E 1E 1E 1E 1E 1E 1E 00 01 End of RLE bitmapReferences:
Palette colors
In an AVI file, palette changes are stored in chunks with id's with the suffix "pc". "pc" chunks contain an AVIPALCHANGE struct as shown below.
/* ------------------
* AVI Palette Change
* ------------------
* /
// Values for this enum have been taken from:
// http://biodi.sdsc.edu/Doc/GARP/garp-1.1/define.h
enum {
PC_EXPLICIT = 0x02,
// Specifies that the low-order word of the logical palette entry
// designates a hardware palette index. This flag allows the application to
// show the contents of the display device palette.
PC_NOCOLLAPSE = 0x04,
// Specifies that the color be placed in an unused entry in the system
// palette instead of being matched to an existing color in the system
// palette. If there are no unused entries in the system palette, the color
// is matched normally. Once this color is in the system palette, colors in
// other logical palettes can be matched to this color.
PC_RESERVED = 0x01
// Specifies that the logical palette entry be used for palette animation.
// This flag prevents other windows from matching colors to the palette
// entry since the color frequently changes. If an unused system-palette
// entry is available, the color is placed in that entry. Otherwise, the
// color is not available for animation.
} peFlagsEnum;
/*
* The PALETTEENTRY structure specifies the color and usage of an entry in a
* logical palette. A logical palette is defined by a LOGPALETTE structure.
* /
typedef struct {
BYTE peRed; // Specifies a red intensity value for the palette entry.
BYTE peGreen; // Specifies a green intensity value for the palette entry.
BYTE peBlue; // Specifies a blue intensity value for the palette entry.
BYTE enum peFlagsEnum peFlags; // Specifies how the palette entry is to be used.
} PALETTEENTRY;
typedef struct {
AVIPALCHANGE avipalchange;
} AVIPALCHANGE0;
typedef struct {
PALETTEENTRY p[256];
} PALETTEENTRY_ALLENTRIES;
typedef struct {
BYTE firstEntry;
// Specifies the index of the first palette entry to change.
BYTE numEntries;
// Specifies the number of palette entries to change, or zero to change
// all 256 palette entries.
WORD flags;
// Reserved.
PALETTEENTRY peNew[numEntries];
// Specifies an array of PALETTEENTRY structures, of size "numEntries".
PALETTEENTRY_ALLENTRIES all[numEntries==0];
} AVIPALCHANGE;
| Constructor Summary | |
|---|---|
TechSmithCodecCore()
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| Method Summary | |
|---|---|
boolean |
decode16(byte[] inDat,
int off,
int length,
int[] outDat,
int[] prevDat,
int width,
int height,
boolean onlyDecodeIfKeyframe)
Decodes from 16-bit to 24-bit RGB. |
boolean |
decode24(byte[] inDat,
int off,
int length,
int[] outDat,
int[] prevDat,
int width,
int height,
boolean onlyDecodeIfKeyframe)
Decodes to 24-bit RGB. |
boolean |
decode8(byte[] inDat,
int off,
int length,
byte[] outDat,
byte[] prevDat,
int width,
int height,
boolean onlyDecodeIfKeyframe)
Decodes to 8-bit palettised. |
boolean |
decode8(byte[] inDat,
int off,
int length,
int[] outDat,
int[] prevDat,
int width,
int height,
boolean onlyDecodeIfKeyframe)
Decodes to 24-bit direct color. |
void |
decodePalette(byte[] inDat,
int off,
int len)
Decodes an AVI palette change chunk. |
void |
encodeDelta16(java.io.OutputStream out,
short[] data,
short[] prev,
int width,
int height,
int offset,
int scanlineStride)
Encodes a 16-bit delta frame. |
void |
encodeDelta24(java.io.OutputStream out,
int[] data,
int[] prev,
int width,
int height,
int offset,
int scanlineStride)
Encodes a 24-bit delta frame. |
void |
encodeDelta8(java.io.OutputStream out,
byte[] data,
byte[] prev,
int width,
int height,
int offset,
int scanlineStride)
Encodes an 8-bit delta frame with indexed colors. |
void |
encodeDelta8to24(java.io.OutputStream out,
byte[] data,
byte[] prev,
int width,
int height,
int offset,
int scanlineStride)
Encodes an 8-bit delta frame with indexed colors to 24-bit. |
void |
encodeKey16(java.io.OutputStream out,
short[] data,
int width,
int height,
int offset,
int scanlineStride)
Encodes a 16-bit key frame. |
void |
encodeKey24(java.io.OutputStream out,
int[] data,
int width,
int height,
int offset,
int scanlineStride)
Encodes a 24-bit key frame. |
void |
encodeKey8(java.io.OutputStream out,
byte[] data,
int width,
int height,
int offset,
int scanlineStride)
Encodes a 8-bit key frame with indexed colors. |
void |
encodeKey8to24(java.io.OutputStream out,
byte[] data,
int width,
int height,
int offset,
int scanlineStride)
Encodes a 8-bit key frame with indexed colors to 24-bit. |
void |
encodeSameDelta16(java.io.OutputStream out,
short[] data,
short[] prev,
int width,
int height,
int offset,
int scanlineStride)
Encodes a delta frame which is known to have the same content than the previous frame. |
void |
encodeSameDelta24(java.io.OutputStream out,
int[] data,
int[] prev,
int width,
int height,
int offset,
int scanlineStride)
Encodes a delta frame which is known to have the same content than the previous frame. |
void |
encodeSameDelta8(java.io.OutputStream out,
byte[] data,
byte[] prev,
int width,
int height,
int offset,
int scanlineStride)
Encodes a delta frame which is known to have the same content than the previous frame. |
int[] |
getPalette()
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void |
reset()
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void |
setPalette(byte[] redValues,
byte[] greenValues,
byte[] blueValues)
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| Methods inherited from class org.monte.media.AbstractVideoCodecCore |
|---|
readInt24LE, readInts24LE, readRGB555to24, readRGB555to24LE, readRGB565to24, readRGBs555to24, readRGBs555to24LE, readRGBs565to24, writeInt24, writeInt24LE, writeInts24, writeInts24LE |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
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public TechSmithCodecCore()
| Method Detail |
|---|
public void reset()
public int[] getPalette()
public void decodePalette(byte[] inDat,
int off,
int len)
throws java.io.IOException
java.io.IOException
public boolean decode8(byte[] inDat,
int off,
int length,
byte[] outDat,
byte[] prevDat,
int width,
int height,
boolean onlyDecodeIfKeyframe)
throws java.io.IOException
inDat - off - length - outDat - prevDat - The pixels decoded in the previous frame. Since no double
buffering is used, this can be the same array than
outDat.width - height - onlyDecodeIfKeyframe -
java.io.IOException
public boolean decode8(byte[] inDat,
int off,
int length,
int[] outDat,
int[] prevDat,
int width,
int height,
boolean onlyDecodeIfKeyframe)
throws java.io.IOException
inDat - off - length - outDat - prevDat - The pixels decoded in the previous frame. Since no double
buffering is used, this can be the same array than
outDat.width - height - onlyDecodeIfKeyframe -
java.io.IOException
public boolean decode24(byte[] inDat,
int off,
int length,
int[] outDat,
int[] prevDat,
int width,
int height,
boolean onlyDecodeIfKeyframe)
throws java.io.IOException
java.io.IOException
public boolean decode16(byte[] inDat,
int off,
int length,
int[] outDat,
int[] prevDat,
int width,
int height,
boolean onlyDecodeIfKeyframe)
throws java.io.IOException
java.io.IOException
public void encodeDelta8(java.io.OutputStream out,
byte[] data,
byte[] prev,
int width,
int height,
int offset,
int scanlineStride)
throws java.io.IOException
out - The output stream.data - The image data.prev - The image data of the previous frame.offset - The offset to the first pixel in the data array.width - The width of the image in data elements.scanlineStride - The number to add to offset to get to the next scanline.
java.io.IOException
public void encodeDelta8to24(java.io.OutputStream out,
byte[] data,
byte[] prev,
int width,
int height,
int offset,
int scanlineStride)
throws java.io.IOException
out - The output stream.data - The image data.prev - The image data of the previous frame.offset - The offset to the first pixel in the data array.width - The width of the image in data elements.scanlineStride - The number to add to offset to get to the next scanline.
java.io.IOException
public void encodeSameDelta8(java.io.OutputStream out,
byte[] data,
byte[] prev,
int width,
int height,
int offset,
int scanlineStride)
throws java.io.IOException
out - data - prev - width - height - offset - scanlineStride -
java.io.IOException
public void encodeSameDelta24(java.io.OutputStream out,
int[] data,
int[] prev,
int width,
int height,
int offset,
int scanlineStride)
throws java.io.IOException
out - data - prev - width - height - offset - scanlineStride -
java.io.IOException
public void encodeSameDelta16(java.io.OutputStream out,
short[] data,
short[] prev,
int width,
int height,
int offset,
int scanlineStride)
throws java.io.IOException
out - data - prev - width - height - offset - scanlineStride -
java.io.IOException
public void encodeKey8(java.io.OutputStream out,
byte[] data,
int width,
int height,
int offset,
int scanlineStride)
throws java.io.IOException
out - The output stream.data - The image data.offset - The offset to the first pixel in the data array.width - The width of the image in data elements.scanlineStride - The number to add to offset to get to the next scanline.
java.io.IOException
public void encodeKey8to24(java.io.OutputStream out,
byte[] data,
int width,
int height,
int offset,
int scanlineStride)
throws java.io.IOException
out - The output stream.data - The image data.offset - The offset to the first pixel in the data array.width - The width of the image in data elements.scanlineStride - The number to add to offset to get to the next scanline.
java.io.IOException
public void encodeDelta16(java.io.OutputStream out,
short[] data,
short[] prev,
int width,
int height,
int offset,
int scanlineStride)
throws java.io.IOException
out - The output stream.data - The image data.prev - The image data of the previous frame.offset - The offset to the first pixel in the data array.width - The width of the image in data elements.scanlineStride - The number to add to offset to get to the next scanline.
java.io.IOException
public void encodeKey24(java.io.OutputStream out,
int[] data,
int width,
int height,
int offset,
int scanlineStride)
throws java.io.IOException
out - The output stream.data - The image data.offset - The offset to the first pixel in the data array.width - The width of the image in data elements.scanlineStride - The number to add to offset to get to the next scanline.
java.io.IOException
public void encodeDelta24(java.io.OutputStream out,
int[] data,
int[] prev,
int width,
int height,
int offset,
int scanlineStride)
throws java.io.IOException
out - The output stream.data - The image data.prev - The image data of the previous frame.offset - The offset to the first pixel in the data array.width - The width of the image in data elements.scanlineStride - The number to add to offset to get to the next scanline.
java.io.IOException
public void encodeKey16(java.io.OutputStream out,
short[] data,
int width,
int height,
int offset,
int scanlineStride)
throws java.io.IOException
out - The output stream.data - The image data.offset - The offset to the first pixel in the data array.width - The width of the image in data elements.scanlineStride - The number to add to offset to get to the next scanline.
java.io.IOException
public void setPalette(byte[] redValues,
byte[] greenValues,
byte[] blueValues)
|
Copyright 2012-04-26 Werner Randelshofer | ||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | ||||||||