+++ /dev/null
-//========================================================================
-//
-// JPXStream.h
-//
-// Copyright 2002-2003 Glyph & Cog, LLC
-//
-//========================================================================
-
-#ifndef JPXSTREAM_H
-#define JPXSTREAM_H
-
-#include <aconf.h>
-
-#ifdef USE_GCC_PRAGMAS
-#pragma interface
-#endif
-
-#include "gtypes.h"
-#include "Object.h"
-#include "Stream.h"
-
-class JArithmeticDecoderStats;
-
-//------------------------------------------------------------------------
-
-enum JPXColorSpaceType {
- jpxCSBiLevel = 0,
- jpxCSYCbCr1 = 1,
- jpxCSYCbCr2 = 3,
- jpxCSYCBCr3 = 4,
- jpxCSPhotoYCC = 9,
- jpxCSCMY = 11,
- jpxCSCMYK = 12,
- jpxCSYCCK = 13,
- jpxCSCIELab = 14,
- jpxCSsRGB = 16,
- jpxCSGrayscale = 17,
- jpxCSBiLevel2 = 18,
- jpxCSCIEJab = 19,
- jpxCSCISesRGB = 20,
- jpxCSROMMRGB = 21,
- jpxCSsRGBYCbCr = 22,
- jpxCSYPbPr1125 = 23,
- jpxCSYPbPr1250 = 24
-};
-
-struct JPXColorSpecCIELab {
- Guint rl, ol, ra, oa, rb, ob, il;
-};
-
-struct JPXColorSpecEnumerated {
- JPXColorSpaceType type; // color space type
- union {
- JPXColorSpecCIELab cieLab;
- };
-};
-
-struct JPXColorSpec {
- Guint meth; // method
- int prec; // precedence
- union {
- JPXColorSpecEnumerated enumerated;
- };
-};
-
-//------------------------------------------------------------------------
-
-struct JPXPalette {
- Guint nEntries; // number of entries in the palette
- Guint nComps; // number of components in each entry
- Guint *bpc; // bits per component, for each component
- int *c; // color data:
- // c[i*nComps+j] = entry i, component j
-};
-
-//------------------------------------------------------------------------
-
-struct JPXCompMap {
- Guint nChannels; // number of channels
- Guint *comp; // codestream components mapped to each channel
- Guint *type; // 0 for direct use, 1 for palette mapping
- Guint *pComp; // palette components to use
-};
-
-//------------------------------------------------------------------------
-
-struct JPXChannelDefn {
- Guint nChannels; // number of channels
- Guint *idx; // channel indexes
- Guint *type; // channel types
- Guint *assoc; // channel associations
-};
-
-//------------------------------------------------------------------------
-
-struct JPXTagTreeNode {
- GBool finished; // true if this node is finished
- Guint val; // current value
-};
-
-//------------------------------------------------------------------------
-
-struct JPXCoeff {
- Gushort flags; // flag bits
- Gushort len; // number of significant bits in mag
- Guint mag; // magnitude value
-};
-
-// coefficient flags
-#define jpxCoeffSignificantB 0
-#define jpxCoeffTouchedB 1
-#define jpxCoeffFirstMagRefB 2
-#define jpxCoeffSignB 7
-#define jpxCoeffSignificant (1 << jpxCoeffSignificantB)
-#define jpxCoeffTouched (1 << jpxCoeffTouchedB)
-#define jpxCoeffFirstMagRef (1 << jpxCoeffFirstMagRefB)
-#define jpxCoeffSign (1 << jpxCoeffSignB)
-
-//------------------------------------------------------------------------
-
-struct JPXCodeBlock {
- //----- size
- Guint x0, y0, x1, y1; // bounds
-
- //----- persistent state
- GBool seen; // true if this code-block has already
- // been seen
- Guint lBlock; // base number of bits used for pkt data length
- Guint nextPass; // next coding pass
-
- //---- info from first packet
- Guint nZeroBitPlanes; // number of zero bit planes
-
- //----- info for the current packet
- Guint included; // code-block inclusion in this packet:
- // 0=not included, 1=included
- Guint nCodingPasses; // number of coding passes in this pkt
- Guint dataLen; // pkt data length
-
- //----- coefficient data
- JPXCoeff *coeffs; // the coefficients
- JArithmeticDecoder // arithmetic decoder
- *arithDecoder;
- JArithmeticDecoderStats // arithmetic decoder stats
- *stats;
-};
-
-//------------------------------------------------------------------------
-
-struct JPXSubband {
- //----- computed
- Guint x0, y0, x1, y1; // bounds
- Guint nXCBs, nYCBs; // number of code-blocks in the x and y
- // directions
-
- //----- tag trees
- Guint maxTTLevel; // max tag tree level
- JPXTagTreeNode *inclusion; // inclusion tag tree for each subband
- JPXTagTreeNode *zeroBitPlane; // zero-bit plane tag tree for each
- // subband
-
- //----- children
- JPXCodeBlock *cbs; // the code-blocks (len = nXCBs * nYCBs)
-};
-
-//------------------------------------------------------------------------
-
-struct JPXPrecinct {
- //----- computed
- Guint x0, y0, x1, y1; // bounds of the precinct
-
- //----- children
- JPXSubband *subbands; // the subbands
-};
-
-//------------------------------------------------------------------------
-
-struct JPXResLevel {
- //----- from the COD and COC segments (main and tile)
- Guint precinctWidth; // log2(precinct width)
- Guint precinctHeight; // log2(precinct height)
-
- //----- computed
- Guint x0, y0, x1, y1; // bounds of the tile-comp (for this res level)
- Guint bx0[3], by0[3], // subband bounds
- bx1[3], by1[3];
-
- //---- children
- JPXPrecinct *precincts; // the precincts
-};
-
-//------------------------------------------------------------------------
-
-struct JPXTileComp {
- //----- from the SIZ segment
- GBool sgned; // 1 for signed, 0 for unsigned
- Guint prec; // precision, in bits
- Guint hSep; // horizontal separation of samples
- Guint vSep; // vertical separation of samples
-
- //----- from the COD and COC segments (main and tile)
- Guint style; // coding style parameter (Scod / Scoc)
- Guint nDecompLevels; // number of decomposition levels
- Guint codeBlockW; // log2(code-block width)
- Guint codeBlockH; // log2(code-block height)
- Guint codeBlockStyle; // code-block style
- Guint transform; // wavelet transformation
-
- //----- from the QCD and QCC segments (main and tile)
- Guint quantStyle; // quantization style
- Guint *quantSteps; // quantization step size for each subband
- Guint nQuantSteps; // number of entries in quantSteps
-
- //----- computed
- Guint x0, y0, x1, y1; // bounds of the tile-comp, in ref coords
- Guint cbW; // code-block width
- Guint cbH; // code-block height
-
- //----- image data
- int *data; // the decoded image data
- int *buf; // intermediate buffer for the inverse
- // transform
-
- //----- children
- JPXResLevel *resLevels; // the resolution levels
- // (len = nDecompLevels + 1)
-};
-
-//------------------------------------------------------------------------
-
-struct JPXTile {
- //----- from the COD segments (main and tile)
- Guint progOrder; // progression order
- Guint nLayers; // number of layers
- Guint multiComp; // multiple component transformation
-
- //----- computed
- Guint x0, y0, x1, y1; // bounds of the tile, in ref coords
- Guint maxNDecompLevels; // max number of decomposition levels used
- // in any component in this tile
-
- //----- progression order loop counters
- Guint comp; // component
- Guint res; // resolution level
- Guint precinct; // precinct
- Guint layer; // layer
-
- //----- children
- JPXTileComp *tileComps; // the tile-components (len = JPXImage.nComps)
-};
-
-//------------------------------------------------------------------------
-
-struct JPXImage {
- //----- from the SIZ segment
- Guint xSize, ySize; // size of reference grid
- Guint xOffset, yOffset; // image offset
- Guint xTileSize, yTileSize; // size of tiles
- Guint xTileOffset, // offset of first tile
- yTileOffset;
- Guint nComps; // number of components
-
- //----- computed
- Guint nXTiles; // number of tiles in x direction
- Guint nYTiles; // number of tiles in y direction
-
- //----- children
- JPXTile *tiles; // the tiles (len = nXTiles * nYTiles)
-};
-
-//------------------------------------------------------------------------
-
-class JPXStream: public FilterStream {
-public:
-
- JPXStream(Stream *strA);
- virtual ~JPXStream();
- virtual StreamKind getKind() { return strJPX; }
- virtual void reset();
- virtual int getChar();
- virtual int lookChar();
- virtual GString *getPSFilter(int psLevel, char *indent);
- virtual GBool isBinary(GBool last = gTrue);
- virtual void getImageParams(int *bitsPerComponent,
- StreamColorSpaceMode *csMode);
-
-private:
-
- void fillReadBuf();
- void getImageParams2(int *bitsPerComponent, StreamColorSpaceMode *csMode);
- GBool readBoxes();
- GBool readColorSpecBox(Guint dataLen);
- GBool readCodestream(Guint len);
- GBool readTilePart();
- GBool readTilePartData(Guint tileIdx,
- Guint tilePartLen, GBool tilePartToEOC);
- GBool readCodeBlockData(JPXTileComp *tileComp,
- JPXResLevel *resLevel,
- JPXPrecinct *precinct,
- JPXSubband *subband,
- Guint res, Guint sb,
- JPXCodeBlock *cb);
- void inverseTransform(JPXTileComp *tileComp);
- void inverseTransformLevel(JPXTileComp *tileComp,
- Guint r, JPXResLevel *resLevel,
- Guint nx0, Guint ny0,
- Guint nx1, Guint ny1);
- void inverseTransform1D(JPXTileComp *tileComp,
- int *data, Guint stride,
- Guint i0, Guint i1);
- GBool inverseMultiCompAndDC(JPXTile *tile);
- GBool readBoxHdr(Guint *boxType, Guint *boxLen, Guint *dataLen);
- int readMarkerHdr(int *segType, Guint *segLen);
- GBool readUByte(Guint *x);
- GBool readByte(int *x);
- GBool readUWord(Guint *x);
- GBool readULong(Guint *x);
- GBool readNBytes(int nBytes, GBool signd, int *x);
- GBool readBits(int nBits, Guint *x);
- void clearBitBuf();
-
- Guint nComps; // number of components
- Guint *bpc; // bits per component, for each component
- Guint width, height; // image size
- GBool haveImgHdr; // set if a JP2/JPX image header has been
- // found
- JPXColorSpec cs; // color specification
- GBool haveCS; // set if a color spec has been found
- JPXPalette palette; // the palette
- GBool havePalette; // set if a palette has been found
- JPXCompMap compMap; // the component mapping
- GBool haveCompMap; // set if a component mapping has been found
- JPXChannelDefn channelDefn; // channel definition
- GBool haveChannelDefn; // set if a channel defn has been found
-
- JPXImage img; // JPEG2000 decoder data
- Guint bitBuf; // buffer for bit reads
- int bitBufLen; // number of bits in bitBuf
- GBool bitBufSkip; // true if next bit should be skipped
- // (for bit stuffing)
- Guint byteCount; // number of bytes read since last call
- // to clearBitBuf
-
- Guint curX, curY, curComp; // current position for lookChar/getChar
- Guint readBuf; // read buffer
- Guint readBufLen; // number of valid bits in readBuf
-};
-
-#endif
git.asbjorn.biz / swftools.git / blobdiff