+++ /dev/null
-//========================================================================
-//
-// JPXStream.cc
-//
-// Copyright 2002-2003 Glyph & Cog, LLC
-//
-//========================================================================
-
-#include <aconf.h>
-
-#ifdef USE_GCC_PRAGMAS
-#pragma implementation
-#endif
-
-#include "gmem.h"
-#include "Error.h"
-#include "JArithmeticDecoder.h"
-#include "JPXStream.h"
-
-//~ to do:
-// - precincts
-// - ROI
-// - progression order changes
-// - packed packet headers
-// - support for palettes, channel maps, etc.
-// - make sure all needed JP2/JPX subboxes are parsed (readBoxes)
-// - can we assume that QCC segments must come after the QCD segment?
-// - skip EPH markers (readTilePartData)
-// - handle tilePartToEOC in readTilePartData
-// - deal with multiple codeword segments (readTilePartData,
-// readCodeBlockData)
-// - progression orders 2, 3, and 4
-// - in coefficient decoding (readCodeBlockData):
-// - termination pattern: terminate after every coding pass
-// - error resilience segmentation symbol
-// - selective arithmetic coding bypass
-// - vertically causal context formation
-// - coeffs longer than 31 bits (should just ignore the extra bits?)
-// - handle boxes larger than 2^32 bytes
-// - the fixed-point arithmetic won't handle 16-bit pixels
-
-//------------------------------------------------------------------------
-
-// number of contexts for the arithmetic decoder
-#define jpxNContexts 19
-
-#define jpxContextSigProp 0 // 0 - 8: significance prop and cleanup
-#define jpxContextSign 9 // 9 - 13: sign
-#define jpxContextMagRef 14 // 14 -16: magnitude refinement
-#define jpxContextRunLength 17 // cleanup: run length
-#define jpxContextUniform 18 // cleanup: first signif coeff
-
-//------------------------------------------------------------------------
-
-#define jpxPassSigProp 0
-#define jpxPassMagRef 1
-#define jpxPassCleanup 2
-
-//------------------------------------------------------------------------
-
-// arithmetic decoder context for the significance propagation and
-// cleanup passes:
-// [horiz][vert][diag][subband]
-// where subband = 0 for HL
-// = 1 for LH and LL
-// = 2 for HH
-static Guint sigPropContext[3][3][5][3] = {
- {{{ 0, 0, 0 }, // horiz=0, vert=0, diag=0
- { 1, 1, 3 }, // horiz=0, vert=0, diag=1
- { 2, 2, 6 }, // horiz=0, vert=0, diag=2
- { 2, 2, 8 }, // horiz=0, vert=0, diag=3
- { 2, 2, 8 }}, // horiz=0, vert=0, diag=4
- {{ 5, 3, 1 }, // horiz=0, vert=1, diag=0
- { 6, 3, 4 }, // horiz=0, vert=1, diag=1
- { 6, 3, 7 }, // horiz=0, vert=1, diag=2
- { 6, 3, 8 }, // horiz=0, vert=1, diag=3
- { 6, 3, 8 }}, // horiz=0, vert=1, diag=4
- {{ 8, 4, 2 }, // horiz=0, vert=2, diag=0
- { 8, 4, 5 }, // horiz=0, vert=2, diag=1
- { 8, 4, 7 }, // horiz=0, vert=2, diag=2
- { 8, 4, 8 }, // horiz=0, vert=2, diag=3
- { 8, 4, 8 }}}, // horiz=0, vert=2, diag=4
- {{{ 3, 5, 1 }, // horiz=1, vert=0, diag=0
- { 3, 6, 4 }, // horiz=1, vert=0, diag=1
- { 3, 6, 7 }, // horiz=1, vert=0, diag=2
- { 3, 6, 8 }, // horiz=1, vert=0, diag=3
- { 3, 6, 8 }}, // horiz=1, vert=0, diag=4
- {{ 7, 7, 2 }, // horiz=1, vert=1, diag=0
- { 7, 7, 5 }, // horiz=1, vert=1, diag=1
- { 7, 7, 7 }, // horiz=1, vert=1, diag=2
- { 7, 7, 8 }, // horiz=1, vert=1, diag=3
- { 7, 7, 8 }}, // horiz=1, vert=1, diag=4
- {{ 8, 7, 2 }, // horiz=1, vert=2, diag=0
- { 8, 7, 5 }, // horiz=1, vert=2, diag=1
- { 8, 7, 7 }, // horiz=1, vert=2, diag=2
- { 8, 7, 8 }, // horiz=1, vert=2, diag=3
- { 8, 7, 8 }}}, // horiz=1, vert=2, diag=4
- {{{ 4, 8, 2 }, // horiz=2, vert=0, diag=0
- { 4, 8, 5 }, // horiz=2, vert=0, diag=1
- { 4, 8, 7 }, // horiz=2, vert=0, diag=2
- { 4, 8, 8 }, // horiz=2, vert=0, diag=3
- { 4, 8, 8 }}, // horiz=2, vert=0, diag=4
- {{ 7, 8, 2 }, // horiz=2, vert=1, diag=0
- { 7, 8, 5 }, // horiz=2, vert=1, diag=1
- { 7, 8, 7 }, // horiz=2, vert=1, diag=2
- { 7, 8, 8 }, // horiz=2, vert=1, diag=3
- { 7, 8, 8 }}, // horiz=2, vert=1, diag=4
- {{ 8, 8, 2 }, // horiz=2, vert=2, diag=0
- { 8, 8, 5 }, // horiz=2, vert=2, diag=1
- { 8, 8, 7 }, // horiz=2, vert=2, diag=2
- { 8, 8, 8 }, // horiz=2, vert=2, diag=3
- { 8, 8, 8 }}} // horiz=2, vert=2, diag=4
-};
-
-// arithmetic decoder context and xor bit for the sign bit in the
-// significance propagation pass:
-// [horiz][vert][k]
-// where horiz/vert are offset by 2 (i.e., range is -2 .. 2)
-// and k = 0 for the context
-// = 1 for the xor bit
-static Guint signContext[5][5][2] = {
- {{ 13, 1 }, // horiz=-2, vert=-2
- { 13, 1 }, // horiz=-2, vert=-1
- { 12, 1 }, // horiz=-2, vert= 0
- { 11, 1 }, // horiz=-2, vert=+1
- { 11, 1 }}, // horiz=-2, vert=+2
- {{ 13, 1 }, // horiz=-1, vert=-2
- { 13, 1 }, // horiz=-1, vert=-1
- { 12, 1 }, // horiz=-1, vert= 0
- { 11, 1 }, // horiz=-1, vert=+1
- { 11, 1 }}, // horiz=-1, vert=+2
- {{ 10, 1 }, // horiz= 0, vert=-2
- { 10, 1 }, // horiz= 0, vert=-1
- { 9, 0 }, // horiz= 0, vert= 0
- { 10, 0 }, // horiz= 0, vert=+1
- { 10, 0 }}, // horiz= 0, vert=+2
- {{ 11, 0 }, // horiz=+1, vert=-2
- { 11, 0 }, // horiz=+1, vert=-1
- { 12, 0 }, // horiz=+1, vert= 0
- { 13, 0 }, // horiz=+1, vert=+1
- { 13, 0 }}, // horiz=+1, vert=+2
- {{ 11, 0 }, // horiz=+2, vert=-2
- { 11, 0 }, // horiz=+2, vert=-1
- { 12, 0 }, // horiz=+2, vert= 0
- { 13, 0 }, // horiz=+2, vert=+1
- { 13, 0 }}, // horiz=+2, vert=+2
-};
-
-//------------------------------------------------------------------------
-
-// constants used in the IDWT
-#define idwtAlpha -1.586134342059924
-#define idwtBeta -0.052980118572961
-#define idwtGamma 0.882911075530934
-#define idwtDelta 0.443506852043971
-#define idwtKappa 1.230174104914001
-#define idwtIKappa (1.0 / idwtKappa)
-
-// number of bits to the right of the decimal point for the fixed
-// point arithmetic used in the IDWT
-#define fracBits 16
-
-//------------------------------------------------------------------------
-
-// floor(x / y)
-#define jpxFloorDiv(x, y) ((x) / (y))
-
-// floor(x / 2^y)
-#define jpxFloorDivPow2(x, y) ((x) >> (y))
-
-// ceil(x / y)
-#define jpxCeilDiv(x, y) (((x) + (y) - 1) / (y))
-
-// ceil(x / 2^y)
-#define jpxCeilDivPow2(x, y) (((x) + (1 << (y)) - 1) >> (y))
-
-//------------------------------------------------------------------------
-
-JPXStream::JPXStream(Stream *strA):
- FilterStream(strA)
-{
- nComps = 0;
- bpc = NULL;
- width = height = 0;
- haveCS = gFalse;
- havePalette = gFalse;
- haveCompMap = gFalse;
- haveChannelDefn = gFalse;
-
- img.tiles = NULL;
- bitBuf = 0;
- bitBufLen = 0;
- bitBufSkip = gFalse;
- byteCount = 0;
-}
-
-JPXStream::~JPXStream() {
- JPXTile *tile;
- JPXTileComp *tileComp;
- JPXResLevel *resLevel;
- JPXPrecinct *precinct;
- JPXSubband *subband;
- JPXCodeBlock *cb;
- Guint comp, i, k, r, pre, sb;
-
- gfree(bpc);
- if (havePalette) {
- gfree(palette.bpc);
- gfree(palette.c);
- }
- if (haveCompMap) {
- gfree(compMap.comp);
- gfree(compMap.type);
- gfree(compMap.pComp);
- }
- if (haveChannelDefn) {
- gfree(channelDefn.idx);
- gfree(channelDefn.type);
- gfree(channelDefn.assoc);
- }
-
- if (img.tiles) {
- for (i = 0; i < img.nXTiles * img.nYTiles; ++i) {
- tile = &img.tiles[i];
- if (tile->tileComps) {
- for (comp = 0; comp < img.nComps; ++comp) {
- tileComp = &tile->tileComps[comp];
- gfree(tileComp->quantSteps);
- gfree(tileComp->data);
- gfree(tileComp->buf);
- if (tileComp->resLevels) {
- for (r = 0; r <= tileComp->nDecompLevels; ++r) {
- resLevel = &tileComp->resLevels[r];
- if (resLevel->precincts) {
- for (pre = 0; pre < 1; ++pre) {
- precinct = &resLevel->precincts[pre];
- if (precinct->subbands) {
- for (sb = 0; sb < (r == 0 ? 1 : 3); ++sb) {
- subband = &precinct->subbands[sb];
- gfree(subband->inclusion);
- gfree(subband->zeroBitPlane);
- if (subband->cbs) {
- for (k = 0; k < subband->nXCBs * subband->nYCBs; ++k) {
- cb = &subband->cbs[k];
- gfree(cb->coeffs);
- if (cb->arithDecoder) {
- delete cb->arithDecoder;
- }
- if (cb->stats) {
- delete cb->stats;
- }
- }
- gfree(subband->cbs);
- }
- }
- gfree(precinct->subbands);
- }
- }
- gfree(img.tiles[i].tileComps[comp].resLevels[r].precincts);
- }
- }
- gfree(img.tiles[i].tileComps[comp].resLevels);
- }
- }
- gfree(img.tiles[i].tileComps);
- }
- }
- gfree(img.tiles);
- }
- delete str;
-}
-
-void JPXStream::reset() {
- str->reset();
- if (readBoxes()) {
- curY = img.yOffset;
- } else {
- // readBoxes reported an error, so we go immediately to EOF
- curY = img.ySize;
- }
- curX = img.xOffset;
- curComp = 0;
- readBufLen = 0;
-}
-
-int JPXStream::getChar() {
- int c;
-
- if (readBufLen < 8) {
- fillReadBuf();
- }
- if (readBufLen == 8) {
- c = readBuf & 0xff;
- readBufLen = 0;
- } else if (readBufLen > 8) {
- c = (readBuf >> (readBufLen - 8)) & 0xff;
- readBufLen -= 8;
- } else if (readBufLen == 0) {
- c = EOF;
- } else {
- c = (readBuf << (8 - readBufLen)) & 0xff;
- readBufLen = 0;
- }
- return c;
-}
-
-int JPXStream::lookChar() {
- int c;
-
- if (readBufLen < 8) {
- fillReadBuf();
- }
- if (readBufLen == 8) {
- c = readBuf & 0xff;
- } else if (readBufLen > 8) {
- c = (readBuf >> (readBufLen - 8)) & 0xff;
- } else if (readBufLen == 0) {
- c = EOF;
- } else {
- c = (readBuf << (8 - readBufLen)) & 0xff;
- }
- return c;
-}
-
-void JPXStream::fillReadBuf() {
- JPXTileComp *tileComp;
- Guint tileIdx, tx, ty;
- int pix, pixBits;
-
- do {
- if (curY >= img.ySize) {
- return;
- }
- tileIdx = ((curY - img.yTileOffset) / img.yTileSize) * img.nXTiles
- + (curX - img.xTileOffset) / img.xTileSize;
-#if 1 //~ ignore the palette, assume the PDF ColorSpace object is valid
- tileComp = &img.tiles[tileIdx].tileComps[curComp];
-#else
- tileComp = &img.tiles[tileIdx].tileComps[havePalette ? 0 : curComp];
-#endif
- tx = jpxCeilDiv((curX - img.xTileOffset) % img.xTileSize, tileComp->hSep);
- ty = jpxCeilDiv((curY - img.yTileOffset) % img.yTileSize, tileComp->vSep);
- pix = (int)tileComp->data[ty * (tileComp->x1 - tileComp->x0) + tx];
- pixBits = tileComp->prec;
-#if 1 //~ ignore the palette, assume the PDF ColorSpace object is valid
- if (++curComp == img.nComps) {
-#else
- if (havePalette) {
- if (pix >= 0 && pix < palette.nEntries) {
- pix = palette.c[pix * palette.nComps + curComp];
- } else {
- pix =
- pixBits = palette.bpc[curComp];
- }
- if (++curComp == (Guint)(havePalette ? palette.nComps : img.nComps)) {
-#endif
- curComp = 0;
- if (++curX == img.xSize) {
- curX = img.xOffset;
- ++curY;
- }
- }
- if (pixBits == 8) {
- readBuf = (readBuf << 8) | (pix & 0xff);
- } else {
- readBuf = (readBuf << pixBits) | (pix & ((1 << pixBits) - 1));
- }
- readBufLen += pixBits;
- } while (readBufLen < 8);
-}
-
-GString *JPXStream::getPSFilter(int psLevel, char *indent) {
- return NULL;
-}
-
-GBool JPXStream::isBinary(GBool last) {
- return str->isBinary(gTrue);
-}
-
-void JPXStream::getImageParams(int *bitsPerComponent,
- StreamColorSpaceMode *csMode) {
- Guint boxType, boxLen, dataLen, csEnum;
- Guint bpc1, dummy, i;
- int csMeth, csPrec, csPrec1, dummy2;
- StreamColorSpaceMode csMode1;
- GBool haveBPC, haveCSMode;
-
- csPrec = 0; // make gcc happy
- haveBPC = haveCSMode = gFalse;
- str->reset();
- if (str->lookChar() == 0xff) {
- getImageParams2(bitsPerComponent, csMode);
- } else {
- while (readBoxHdr(&boxType, &boxLen, &dataLen)) {
- if (boxType == 0x6a703268) { // JP2 header
- // skip the superbox
- } else if (boxType == 0x69686472) { // image header
- if (readULong(&dummy) &&
- readULong(&dummy) &&
- readUWord(&dummy) &&
- readUByte(&bpc1) &&
- readUByte(&dummy) &&
- readUByte(&dummy) &&
- readUByte(&dummy)) {
- *bitsPerComponent = bpc1 + 1;
- haveBPC = gTrue;
- }
- } else if (boxType == 0x636F6C72) { // color specification
- if (readByte(&csMeth) &&
- readByte(&csPrec1) &&
- readByte(&dummy2)) {
- if (csMeth == 1) {
- if (readULong(&csEnum)) {
- csMode1 = streamCSNone;
- if (csEnum == jpxCSBiLevel ||
- csEnum == jpxCSGrayscale) {
- csMode1 = streamCSDeviceGray;
- } else if (csEnum == jpxCSCMYK) {
- csMode1 = streamCSDeviceCMYK;
- } else if (csEnum == jpxCSsRGB ||
- csEnum == jpxCSCISesRGB ||
- csEnum == jpxCSROMMRGB) {
- csMode1 = streamCSDeviceRGB;
- }
- if (csMode1 != streamCSNone &&
- (!haveCSMode || csPrec1 > csPrec)) {
- *csMode = csMode1;
- csPrec = csPrec1;
- haveCSMode = gTrue;
- }
- for (i = 0; i < dataLen - 7; ++i) {
- str->getChar();
- }
- }
- } else {
- for (i = 0; i < dataLen - 3; ++i) {
- str->getChar();
- }
- }
- }
- } else if (boxType == 0x6A703263) { // codestream
- if (!(haveBPC && haveCSMode)) {
- getImageParams2(bitsPerComponent, csMode);
- }
- break;
- } else {
- for (i = 0; i < dataLen; ++i) {
- str->getChar();
- }
- }
- }
- }
- str->close();
-}
-
-// Get image parameters from the codestream.
-void JPXStream::getImageParams2(int *bitsPerComponent,
- StreamColorSpaceMode *csMode) {
- int segType;
- Guint segLen, nComps1, bpc1, dummy, i;
-
- while (readMarkerHdr(&segType, &segLen)) {
- if (segType == 0x51) { // SIZ - image and tile size
- if (readUWord(&dummy) &&
- readULong(&dummy) &&
- readULong(&dummy) &&
- readULong(&dummy) &&
- readULong(&dummy) &&
- readULong(&dummy) &&
- readULong(&dummy) &&
- readULong(&dummy) &&
- readULong(&dummy) &&
- readUWord(&nComps1) &&
- readUByte(&bpc1)) {
- *bitsPerComponent = (bpc1 & 0x7f) + 1;
- // if there's no color space info, take a guess
- if (nComps1 == 1) {
- *csMode = streamCSDeviceGray;
- } else if (nComps1 == 3) {
- *csMode = streamCSDeviceRGB;
- } else if (nComps1 == 4) {
- *csMode = streamCSDeviceCMYK;
- }
- }
- break;
- } else {
- if (segLen > 2) {
- for (i = 0; i < segLen - 2; ++i) {
- str->getChar();
- }
- }
- }
- }
-}
-
-GBool JPXStream::readBoxes() {
- Guint boxType, boxLen, dataLen;
- Guint bpc1, compression, unknownColorspace, ipr;
- Guint i, j;
-
- haveImgHdr = gFalse;
-
- // check for a naked JPEG 2000 codestream (without the JP2/JPX
- // wrapper) -- this appears to be a violation of the PDF spec, but
- // Acrobat allows it
- if (str->lookChar() == 0xff) {
- error(getPos(), "Naked JPEG 2000 codestream, missing JP2/JPX wrapper");
- readCodestream(0);
- nComps = img.nComps;
- bpc = (Guint *)gmallocn(nComps, sizeof(Guint));
- for (i = 0; i < nComps; ++i) {
- bpc[i] = img.tiles[0].tileComps[i].prec;
- }
- width = img.xSize - img.xOffset;
- height = img.ySize - img.yOffset;
- return gTrue;
- }
-
- while (readBoxHdr(&boxType, &boxLen, &dataLen)) {
- switch (boxType) {
- case 0x6a703268: // JP2 header
- // this is a grouping box ('superbox') which has no real
- // contents and doesn't appear to be used consistently, i.e.,
- // some things which should be subboxes of the JP2 header box
- // show up outside of it - so we simply ignore the JP2 header
- // box
- break;
- case 0x69686472: // image header
- if (!readULong(&height) ||
- !readULong(&width) ||
- !readUWord(&nComps) ||
- !readUByte(&bpc1) ||
- !readUByte(&compression) ||
- !readUByte(&unknownColorspace) ||
- !readUByte(&ipr)) {
- error(getPos(), "Unexpected EOF in JPX stream");
- return gFalse;
- }
- if (compression != 7) {
- error(getPos(), "Unknown compression type in JPX stream");
- return gFalse;
- }
- bpc = (Guint *)gmallocn(nComps, sizeof(Guint));
- for (i = 0; i < nComps; ++i) {
- bpc[i] = bpc1;
- }
- haveImgHdr = gTrue;
- break;
- case 0x62706363: // bits per component
- if (!haveImgHdr) {
- error(getPos(), "Found bits per component box before image header box in JPX stream");
- return gFalse;
- }
- if (dataLen != nComps) {
- error(getPos(), "Invalid bits per component box in JPX stream");
- return gFalse;
- }
- for (i = 0; i < nComps; ++i) {
- if (!readUByte(&bpc[i])) {
- error(getPos(), "Unexpected EOF in JPX stream");
- return gFalse;
- }
- }
- break;
- case 0x636F6C72: // color specification
- if (!readColorSpecBox(dataLen)) {
- return gFalse;
- }
- break;
- case 0x70636c72: // palette
- if (!readUWord(&palette.nEntries) ||
- !readUByte(&palette.nComps)) {
- error(getPos(), "Unexpected EOF in JPX stream");
- return gFalse;
- }
- palette.bpc = (Guint *)gmallocn(palette.nComps, sizeof(Guint));
- palette.c =
- (int *)gmallocn(palette.nEntries * palette.nComps, sizeof(int));
- for (i = 0; i < palette.nComps; ++i) {
- if (!readUByte(&palette.bpc[i])) {
- error(getPos(), "Unexpected EOF in JPX stream");
- return gFalse;
- }
- ++palette.bpc[i];
- }
- for (i = 0; i < palette.nEntries; ++i) {
- for (j = 0; j < palette.nComps; ++j) {
- if (!readNBytes(((palette.bpc[j] & 0x7f) + 7) >> 3,
- (palette.bpc[j] & 0x80) ? gTrue : gFalse,
- &palette.c[i * palette.nComps + j])) {
- error(getPos(), "Unexpected EOF in JPX stream");
- return gFalse;
- }
- }
- }
- havePalette = gTrue;
- break;
- case 0x636d6170: // component mapping
- compMap.nChannels = dataLen / 4;
- compMap.comp = (Guint *)gmallocn(compMap.nChannels, sizeof(Guint));
- compMap.type = (Guint *)gmallocn(compMap.nChannels, sizeof(Guint));
- compMap.pComp = (Guint *)gmallocn(compMap.nChannels, sizeof(Guint));
- for (i = 0; i < compMap.nChannels; ++i) {
- if (!readUWord(&compMap.comp[i]) ||
- !readUByte(&compMap.type[i]) ||
- !readUByte(&compMap.pComp[i])) {
- error(getPos(), "Unexpected EOF in JPX stream");
- return gFalse;
- }
- }
- haveCompMap = gTrue;
- break;
- case 0x63646566: // channel definition
- if (!readUWord(&channelDefn.nChannels)) {
- error(getPos(), "Unexpected EOF in JPX stream");
- return gFalse;
- }
- channelDefn.idx =
- (Guint *)gmallocn(channelDefn.nChannels, sizeof(Guint));
- channelDefn.type =
- (Guint *)gmallocn(channelDefn.nChannels, sizeof(Guint));
- channelDefn.assoc =
- (Guint *)gmallocn(channelDefn.nChannels, sizeof(Guint));
- for (i = 0; i < channelDefn.nChannels; ++i) {
- if (!readUWord(&channelDefn.idx[i]) ||
- !readUWord(&channelDefn.type[i]) ||
- !readUWord(&channelDefn.assoc[i])) {
- error(getPos(), "Unexpected EOF in JPX stream");
- return gFalse;
- }
- }
- haveChannelDefn = gTrue;
- break;
- case 0x6A703263: // contiguous codestream
- if (!bpc) {
- error(getPos(), "JPX stream is missing the image header box");
- }
- if (!haveCS) {
- error(getPos(), "JPX stream has no supported color spec");
- }
- if (!readCodestream(dataLen)) {
- return gFalse;
- }
- break;
- default:
- for (i = 0; i < dataLen; ++i) {
- if (str->getChar() == EOF) {
- error(getPos(), "Unexpected EOF in JPX stream");
- return gFalse;
- }
- }
- break;
- }
- }
- return gTrue;
-}
-
-GBool JPXStream::readColorSpecBox(Guint dataLen) {
- JPXColorSpec newCS;
- Guint csApprox, csEnum;
- Guint i;
- GBool ok;
-
- ok = gFalse;
- if (!readUByte(&newCS.meth) ||
- !readByte(&newCS.prec) ||
- !readUByte(&csApprox)) {
- goto err;
- }
- switch (newCS.meth) {
- case 1: // enumerated colorspace
- if (!readULong(&csEnum)) {
- goto err;
- }
- newCS.enumerated.type = (JPXColorSpaceType)csEnum;
- switch (newCS.enumerated.type) {
- case jpxCSBiLevel:
- ok = gTrue;
- break;
- case jpxCSYCbCr1:
- ok = gTrue;
- break;
- case jpxCSYCbCr2:
- ok = gTrue;
- break;
- case jpxCSYCBCr3:
- ok = gTrue;
- break;
- case jpxCSPhotoYCC:
- ok = gTrue;
- break;
- case jpxCSCMY:
- ok = gTrue;
- break;
- case jpxCSCMYK:
- ok = gTrue;
- break;
- case jpxCSYCCK:
- ok = gTrue;
- break;
- case jpxCSCIELab:
- if (dataLen == 7 + 7*4) {
- if (!readULong(&newCS.enumerated.cieLab.rl) ||
- !readULong(&newCS.enumerated.cieLab.ol) ||
- !readULong(&newCS.enumerated.cieLab.ra) ||
- !readULong(&newCS.enumerated.cieLab.oa) ||
- !readULong(&newCS.enumerated.cieLab.rb) ||
- !readULong(&newCS.enumerated.cieLab.ob) ||
- !readULong(&newCS.enumerated.cieLab.il)) {
- goto err;
- }
- } else if (dataLen == 7) {
- //~ this assumes the 8-bit case
- newCS.enumerated.cieLab.rl = 100;
- newCS.enumerated.cieLab.ol = 0;
- newCS.enumerated.cieLab.ra = 255;
- newCS.enumerated.cieLab.oa = 128;
- newCS.enumerated.cieLab.rb = 255;
- newCS.enumerated.cieLab.ob = 96;
- newCS.enumerated.cieLab.il = 0x00443530;
- } else {
- goto err;
- }
- ok = gTrue;
- break;
- case jpxCSsRGB:
- ok = gTrue;
- break;
- case jpxCSGrayscale:
- ok = gTrue;
- break;
- case jpxCSBiLevel2:
- ok = gTrue;
- break;
- case jpxCSCIEJab:
- // not allowed in PDF
- goto err;
- case jpxCSCISesRGB:
- ok = gTrue;
- break;
- case jpxCSROMMRGB:
- ok = gTrue;
- break;
- case jpxCSsRGBYCbCr:
- ok = gTrue;
- break;
- case jpxCSYPbPr1125:
- ok = gTrue;
- break;
- case jpxCSYPbPr1250:
- ok = gTrue;
- break;
- default:
- goto err;
- }
- break;
- case 2: // restricted ICC profile
- case 3: // any ICC profile (JPX)
- case 4: // vendor color (JPX)
- for (i = 0; i < dataLen - 3; ++i) {
- if (str->getChar() == EOF) {
- goto err;
- }
- }
- break;
- }
-
- if (ok && (!haveCS || newCS.prec > cs.prec)) {
- cs = newCS;
- haveCS = gTrue;
- }
-
- return gTrue;
-
- err:
- error(getPos(), "Error in JPX color spec");
- return gFalse;
-}
-
-GBool JPXStream::readCodestream(Guint len) {
- JPXTile *tile;
- JPXTileComp *tileComp;
- int segType;
- GBool haveSIZ, haveCOD, haveQCD, haveSOT;
- Guint precinctSize, style;
- Guint segLen, capabilities, nTiles, comp, i, j, r;
-
- //----- main header
- haveSIZ = haveCOD = haveQCD = haveSOT = gFalse;
- do {
- if (!readMarkerHdr(&segType, &segLen)) {
- error(getPos(), "Error in JPX codestream");
- return gFalse;
- }
- switch (segType) {
- case 0x4f: // SOC - start of codestream
- // marker only
- break;
- case 0x51: // SIZ - image and tile size
- if (!readUWord(&capabilities) ||
- !readULong(&img.xSize) ||
- !readULong(&img.ySize) ||
- !readULong(&img.xOffset) ||
- !readULong(&img.yOffset) ||
- !readULong(&img.xTileSize) ||
- !readULong(&img.yTileSize) ||
- !readULong(&img.xTileOffset) ||
- !readULong(&img.yTileOffset) ||
- !readUWord(&img.nComps)) {
- error(getPos(), "Error in JPX SIZ marker segment");
- return gFalse;
- }
- if (haveImgHdr && img.nComps != nComps) {
- error(getPos(), "Different number of components in JPX SIZ marker segment");
- return gFalse;
- }
- img.nXTiles = (img.xSize - img.xTileOffset + img.xTileSize - 1)
- / img.xTileSize;
- img.nYTiles = (img.ySize - img.yTileOffset + img.yTileSize - 1)
- / img.yTileSize;
- nTiles = img.nXTiles * img.nYTiles;
- // check for overflow before allocating memory
- if (nTiles == 0 || nTiles / img.nXTiles != img.nYTiles) {
- error(getPos(), "Bad tile count in JPX SIZ marker segment");
- return gFalse;
- }
- img.tiles = (JPXTile *)gmallocn(nTiles, sizeof(JPXTile));
- for (i = 0; i < img.nXTiles * img.nYTiles; ++i) {
- img.tiles[i].tileComps = (JPXTileComp *)gmallocn(img.nComps,
- sizeof(JPXTileComp));
- for (comp = 0; comp < img.nComps; ++comp) {
- img.tiles[i].tileComps[comp].quantSteps = NULL;
- img.tiles[i].tileComps[comp].data = NULL;
- img.tiles[i].tileComps[comp].buf = NULL;
- img.tiles[i].tileComps[comp].resLevels = NULL;
- }
- }
- for (comp = 0; comp < img.nComps; ++comp) {
- if (!readUByte(&img.tiles[0].tileComps[comp].prec) ||
- !readUByte(&img.tiles[0].tileComps[comp].hSep) ||
- !readUByte(&img.tiles[0].tileComps[comp].vSep)) {
- error(getPos(), "Error in JPX SIZ marker segment");
- return gFalse;
- }
- img.tiles[0].tileComps[comp].sgned =
- (img.tiles[0].tileComps[comp].prec & 0x80) ? gTrue : gFalse;
- img.tiles[0].tileComps[comp].prec =
- (img.tiles[0].tileComps[comp].prec & 0x7f) + 1;
- for (i = 1; i < img.nXTiles * img.nYTiles; ++i) {
- img.tiles[i].tileComps[comp] = img.tiles[0].tileComps[comp];
- }
- }
- haveSIZ = gTrue;
- break;
- case 0x52: // COD - coding style default
- if (!readUByte(&img.tiles[0].tileComps[0].style) ||
- !readUByte(&img.tiles[0].progOrder) ||
- !readUWord(&img.tiles[0].nLayers) ||
- !readUByte(&img.tiles[0].multiComp) ||
- !readUByte(&img.tiles[0].tileComps[0].nDecompLevels) ||
- !readUByte(&img.tiles[0].tileComps[0].codeBlockW) ||
- !readUByte(&img.tiles[0].tileComps[0].codeBlockH) ||
- !readUByte(&img.tiles[0].tileComps[0].codeBlockStyle) ||
- !readUByte(&img.tiles[0].tileComps[0].transform)) {
- error(getPos(), "Error in JPX COD marker segment");
- return gFalse;
- }
- img.tiles[0].tileComps[0].codeBlockW += 2;
- img.tiles[0].tileComps[0].codeBlockH += 2;
- for (i = 0; i < img.nXTiles * img.nYTiles; ++i) {
- if (i != 0) {
- img.tiles[i].progOrder = img.tiles[0].progOrder;
- img.tiles[i].nLayers = img.tiles[0].nLayers;
- img.tiles[i].multiComp = img.tiles[0].multiComp;
- }
- for (comp = 0; comp < img.nComps; ++comp) {
- if (!(i == 0 && comp == 0)) {
- img.tiles[i].tileComps[comp].style =
- img.tiles[0].tileComps[0].style;
- img.tiles[i].tileComps[comp].nDecompLevels =
- img.tiles[0].tileComps[0].nDecompLevels;
- img.tiles[i].tileComps[comp].codeBlockW =
- img.tiles[0].tileComps[0].codeBlockW;
- img.tiles[i].tileComps[comp].codeBlockH =
- img.tiles[0].tileComps[0].codeBlockH;
- img.tiles[i].tileComps[comp].codeBlockStyle =
- img.tiles[0].tileComps[0].codeBlockStyle;
- img.tiles[i].tileComps[comp].transform =
- img.tiles[0].tileComps[0].transform;
- }
- img.tiles[i].tileComps[comp].resLevels =
- (JPXResLevel *)gmallocn(
- (img.tiles[i].tileComps[comp].nDecompLevels + 1),
- sizeof(JPXResLevel));
- for (r = 0; r <= img.tiles[i].tileComps[comp].nDecompLevels; ++r) {
- img.tiles[i].tileComps[comp].resLevels[r].precincts = NULL;
- }
- }
- }
- for (r = 0; r <= img.tiles[0].tileComps[0].nDecompLevels; ++r) {
- if (img.tiles[0].tileComps[0].style & 0x01) {
- if (!readUByte(&precinctSize)) {
- error(getPos(), "Error in JPX COD marker segment");
- return gFalse;
- }
- img.tiles[0].tileComps[0].resLevels[r].precinctWidth =
- precinctSize & 0x0f;
- img.tiles[0].tileComps[0].resLevels[r].precinctHeight =
- (precinctSize >> 4) & 0x0f;
- } else {
- img.tiles[0].tileComps[0].resLevels[r].precinctWidth = 15;
- img.tiles[0].tileComps[0].resLevels[r].precinctHeight = 15;
- }
- }
- for (i = 0; i < img.nXTiles * img.nYTiles; ++i) {
- for (comp = 0; comp < img.nComps; ++comp) {
- if (!(i == 0 && comp == 0)) {
- for (r = 0; r <= img.tiles[i].tileComps[comp].nDecompLevels; ++r) {
- img.tiles[i].tileComps[comp].resLevels[r].precinctWidth =
- img.tiles[0].tileComps[0].resLevels[r].precinctWidth;
- img.tiles[i].tileComps[comp].resLevels[r].precinctHeight =
- img.tiles[0].tileComps[0].resLevels[r].precinctHeight;
- }
- }
- }
- }
- haveCOD = gTrue;
- break;
- case 0x53: // COC - coding style component
- if (!haveCOD) {
- error(getPos(), "JPX COC marker segment before COD segment");
- return gFalse;
- }
- if ((img.nComps > 256 && !readUWord(&comp)) ||
- (img.nComps <= 256 && !readUByte(&comp)) ||
- comp >= img.nComps ||
- !readUByte(&style) ||
- !readUByte(&img.tiles[0].tileComps[comp].nDecompLevels) ||
- !readUByte(&img.tiles[0].tileComps[comp].codeBlockW) ||
- !readUByte(&img.tiles[0].tileComps[comp].codeBlockH) ||
- !readUByte(&img.tiles[0].tileComps[comp].codeBlockStyle) ||
- !readUByte(&img.tiles[0].tileComps[comp].transform)) {
- error(getPos(), "Error in JPX COC marker segment");
- return gFalse;
- }
- img.tiles[0].tileComps[comp].style =
- (img.tiles[0].tileComps[comp].style & ~1) | (style & 1);
- img.tiles[0].tileComps[comp].codeBlockW += 2;
- img.tiles[0].tileComps[comp].codeBlockH += 2;
- for (i = 0; i < img.nXTiles * img.nYTiles; ++i) {
- if (i != 0) {
- img.tiles[i].tileComps[comp].style =
- img.tiles[0].tileComps[comp].style;
- img.tiles[i].tileComps[comp].nDecompLevels =
- img.tiles[0].tileComps[comp].nDecompLevels;
- img.tiles[i].tileComps[comp].codeBlockW =
- img.tiles[0].tileComps[comp].codeBlockW;
- img.tiles[i].tileComps[comp].codeBlockH =
- img.tiles[0].tileComps[comp].codeBlockH;
- img.tiles[i].tileComps[comp].codeBlockStyle =
- img.tiles[0].tileComps[comp].codeBlockStyle;
- img.tiles[i].tileComps[comp].transform =
- img.tiles[0].tileComps[comp].transform;
- }
- img.tiles[i].tileComps[comp].resLevels =
- (JPXResLevel *)greallocn(
- img.tiles[i].tileComps[comp].resLevels,
- (img.tiles[i].tileComps[comp].nDecompLevels + 1),
- sizeof(JPXResLevel));
- for (r = 0; r <= img.tiles[i].tileComps[comp].nDecompLevels; ++r) {
- img.tiles[i].tileComps[comp].resLevels[r].precincts = NULL;
- }
- }
- for (r = 0; r <= img.tiles[0].tileComps[comp].nDecompLevels; ++r) {
- if (img.tiles[0].tileComps[comp].style & 0x01) {
- if (!readUByte(&precinctSize)) {
- error(getPos(), "Error in JPX COD marker segment");
- return gFalse;
- }
- img.tiles[0].tileComps[comp].resLevels[r].precinctWidth =
- precinctSize & 0x0f;
- img.tiles[0].tileComps[comp].resLevels[r].precinctHeight =
- (precinctSize >> 4) & 0x0f;
- } else {
- img.tiles[0].tileComps[comp].resLevels[r].precinctWidth = 15;
- img.tiles[0].tileComps[comp].resLevels[r].precinctHeight = 15;
- }
- }
- for (i = 1; i < img.nXTiles * img.nYTiles; ++i) {
- for (r = 0; r <= img.tiles[i].tileComps[comp].nDecompLevels; ++r) {
- img.tiles[i].tileComps[comp].resLevels[r].precinctWidth =
- img.tiles[0].tileComps[comp].resLevels[r].precinctWidth;
- img.tiles[i].tileComps[comp].resLevels[r].precinctHeight =
- img.tiles[0].tileComps[comp].resLevels[r].precinctHeight;
- }
- }
- break;
- case 0x5c: // QCD - quantization default
- if (!readUByte(&img.tiles[0].tileComps[0].quantStyle)) {
- error(getPos(), "Error in JPX QCD marker segment");
- return gFalse;
- }
- if ((img.tiles[0].tileComps[0].quantStyle & 0x1f) == 0x00) {
- img.tiles[0].tileComps[0].nQuantSteps = segLen - 3;
- img.tiles[0].tileComps[0].quantSteps =
- (Guint *)greallocn(img.tiles[0].tileComps[0].quantSteps,
- img.tiles[0].tileComps[0].nQuantSteps,
- sizeof(Guint));
- for (i = 0; i < img.tiles[0].tileComps[0].nQuantSteps; ++i) {
- if (!readUByte(&img.tiles[0].tileComps[0].quantSteps[i])) {
- error(getPos(), "Error in JPX QCD marker segment");
- return gFalse;
- }
- }
- } else if ((img.tiles[0].tileComps[0].quantStyle & 0x1f) == 0x01) {
- img.tiles[0].tileComps[0].nQuantSteps = 1;
- img.tiles[0].tileComps[0].quantSteps =
- (Guint *)greallocn(img.tiles[0].tileComps[0].quantSteps,
- img.tiles[0].tileComps[0].nQuantSteps,
- sizeof(Guint));
- if (!readUWord(&img.tiles[0].tileComps[0].quantSteps[0])) {
- error(getPos(), "Error in JPX QCD marker segment");
- return gFalse;
- }
- } else if ((img.tiles[0].tileComps[0].quantStyle & 0x1f) == 0x02) {
- img.tiles[0].tileComps[0].nQuantSteps = (segLen - 3) / 2;
- img.tiles[0].tileComps[0].quantSteps =
- (Guint *)greallocn(img.tiles[0].tileComps[0].quantSteps,
- img.tiles[0].tileComps[0].nQuantSteps,
- sizeof(Guint));
- for (i = 0; i < img.tiles[0].tileComps[0].nQuantSteps; ++i) {
- if (!readUWord(&img.tiles[0].tileComps[0].quantSteps[i])) {
- error(getPos(), "Error in JPX QCD marker segment");
- return gFalse;
- }
- }
- } else {
- error(getPos(), "Error in JPX QCD marker segment");
- return gFalse;
- }
- for (i = 0; i < img.nXTiles * img.nYTiles; ++i) {
- for (comp = 0; comp < img.nComps; ++comp) {
- if (!(i == 0 && comp == 0)) {
- img.tiles[i].tileComps[comp].quantStyle =
- img.tiles[0].tileComps[0].quantStyle;
- img.tiles[i].tileComps[comp].nQuantSteps =
- img.tiles[0].tileComps[0].nQuantSteps;
- img.tiles[i].tileComps[comp].quantSteps =
- (Guint *)greallocn(img.tiles[i].tileComps[comp].quantSteps,
- img.tiles[0].tileComps[0].nQuantSteps,
- sizeof(Guint));
- for (j = 0; j < img.tiles[0].tileComps[0].nQuantSteps; ++j) {
- img.tiles[i].tileComps[comp].quantSteps[j] =
- img.tiles[0].tileComps[0].quantSteps[j];
- }
- }
- }
- }
- haveQCD = gTrue;
- break;
- case 0x5d: // QCC - quantization component
- if (!haveQCD) {
- error(getPos(), "JPX QCC marker segment before QCD segment");
- return gFalse;
- }
- if ((img.nComps > 256 && !readUWord(&comp)) ||
- (img.nComps <= 256 && !readUByte(&comp)) ||
- comp >= img.nComps ||
- !readUByte(&img.tiles[0].tileComps[comp].quantStyle)) {
- error(getPos(), "Error in JPX QCC marker segment");
- return gFalse;
- }
- if ((img.tiles[0].tileComps[comp].quantStyle & 0x1f) == 0x00) {
- img.tiles[0].tileComps[comp].nQuantSteps =
- segLen - (img.nComps > 256 ? 5 : 4);
- img.tiles[0].tileComps[comp].quantSteps =
- (Guint *)greallocn(img.tiles[0].tileComps[comp].quantSteps,
- img.tiles[0].tileComps[comp].nQuantSteps,
- sizeof(Guint));
- for (i = 0; i < img.tiles[0].tileComps[comp].nQuantSteps; ++i) {
- if (!readUByte(&img.tiles[0].tileComps[comp].quantSteps[i])) {
- error(getPos(), "Error in JPX QCC marker segment");
- return gFalse;
- }
- }
- } else if ((img.tiles[0].tileComps[comp].quantStyle & 0x1f) == 0x01) {
- img.tiles[0].tileComps[comp].nQuantSteps = 1;
- img.tiles[0].tileComps[comp].quantSteps =
- (Guint *)greallocn(img.tiles[0].tileComps[comp].quantSteps,
- img.tiles[0].tileComps[comp].nQuantSteps,
- sizeof(Guint));
- if (!readUWord(&img.tiles[0].tileComps[comp].quantSteps[0])) {
- error(getPos(), "Error in JPX QCC marker segment");
- return gFalse;
- }
- } else if ((img.tiles[0].tileComps[comp].quantStyle & 0x1f) == 0x02) {
- img.tiles[0].tileComps[comp].nQuantSteps =
- (segLen - (img.nComps > 256 ? 5 : 4)) / 2;
- img.tiles[0].tileComps[comp].quantSteps =
- (Guint *)greallocn(img.tiles[0].tileComps[comp].quantSteps,
- img.tiles[0].tileComps[comp].nQuantSteps,
- sizeof(Guint));
- for (i = 0; i < img.tiles[0].tileComps[comp].nQuantSteps; ++i) {
- if (!readUWord(&img.tiles[0].tileComps[comp].quantSteps[i])) {
- error(getPos(), "Error in JPX QCD marker segment");
- return gFalse;
- }
- }
- } else {
- error(getPos(), "Error in JPX QCC marker segment");
- return gFalse;
- }
- for (i = 1; i < img.nXTiles * img.nYTiles; ++i) {
- img.tiles[i].tileComps[comp].quantStyle =
- img.tiles[0].tileComps[comp].quantStyle;
- img.tiles[i].tileComps[comp].nQuantSteps =
- img.tiles[0].tileComps[comp].nQuantSteps;
- img.tiles[i].tileComps[comp].quantSteps =
- (Guint *)greallocn(img.tiles[i].tileComps[comp].quantSteps,
- img.tiles[0].tileComps[comp].nQuantSteps,
- sizeof(Guint));
- for (j = 0; j < img.tiles[0].tileComps[comp].nQuantSteps; ++j) {
- img.tiles[i].tileComps[comp].quantSteps[j] =
- img.tiles[0].tileComps[comp].quantSteps[j];
- }
- }
- break;
- case 0x5e: // RGN - region of interest
-#if 1 //~ ROI is unimplemented
- fprintf(stderr, "RGN\n");
- for (i = 0; i < segLen - 2; ++i) {
- if (str->getChar() == EOF) {
- error(getPos(), "Error in JPX PPM marker segment");
- return gFalse;
- }
- }
-#else
- if ((img.nComps > 256 && !readUWord(&comp)) ||
- (img.nComps <= 256 && !readUByte(&comp)) ||
- comp >= img.nComps ||
- !readUByte(&compInfo[comp].defROI.style) ||
- !readUByte(&compInfo[comp].defROI.shift)) {
- error(getPos(), "Error in JPX RGN marker segment");
- return gFalse;
- }
-#endif
- break;
- case 0x5f: // POC - progression order change
-#if 1 //~ progression order changes are unimplemented
- fprintf(stderr, "POC\n");
- for (i = 0; i < segLen - 2; ++i) {
- if (str->getChar() == EOF) {
- error(getPos(), "Error in JPX PPM marker segment");
- return gFalse;
- }
- }
-#else
- nProgs = (segLen - 2) / (img.nComps > 256 ? 9 : 7);
- progs = (JPXProgOrder *)gmallocn(nProgs, sizeof(JPXProgOrder));
- for (i = 0; i < nProgs; ++i) {
- if (!readUByte(&progs[i].startRes) ||
- !(img.nComps > 256 && readUWord(&progs[i].startComp)) ||
- !(img.nComps <= 256 && readUByte(&progs[i].startComp)) ||
- !readUWord(&progs[i].endLayer) ||
- !readUByte(&progs[i].endRes) ||
- !(img.nComps > 256 && readUWord(&progs[i].endComp)) ||
- !(img.nComps <= 256 && readUByte(&progs[i].endComp)) ||
- !readUByte(&progs[i].progOrder)) {
- error(getPos(), "Error in JPX POC marker segment");
- return gFalse;
- }
- }
-#endif
- break;
- case 0x60: // PPM - packed packet headers, main header
-#if 1 //~ packed packet headers are unimplemented
- fprintf(stderr, "PPM\n");
- for (i = 0; i < segLen - 2; ++i) {
- if (str->getChar() == EOF) {
- error(getPos(), "Error in JPX PPM marker segment");
- return gFalse;
- }
- }
-#endif
- break;
- case 0x55: // TLM - tile-part lengths
- // skipped
- for (i = 0; i < segLen - 2; ++i) {
- if (str->getChar() == EOF) {
- error(getPos(), "Error in JPX TLM marker segment");
- return gFalse;
- }
- }
- break;
- case 0x57: // PLM - packet length, main header
- // skipped
- for (i = 0; i < segLen - 2; ++i) {
- if (str->getChar() == EOF) {
- error(getPos(), "Error in JPX PLM marker segment");
- return gFalse;
- }
- }
- break;
- case 0x63: // CRG - component registration
- // skipped
- for (i = 0; i < segLen - 2; ++i) {
- if (str->getChar() == EOF) {
- error(getPos(), "Error in JPX CRG marker segment");
- return gFalse;
- }
- }
- break;
- case 0x64: // COM - comment
- // skipped
- for (i = 0; i < segLen - 2; ++i) {
- if (str->getChar() == EOF) {
- error(getPos(), "Error in JPX COM marker segment");
- return gFalse;
- }
- }
- break;
- case 0x90: // SOT - start of tile
- haveSOT = gTrue;
- break;
- default:
- error(getPos(), "Unknown marker segment %02x in JPX stream", segType);
- for (i = 0; i < segLen - 2; ++i) {
- if (str->getChar() == EOF) {
- break;
- }
- }
- break;
- }
- } while (!haveSOT);
-
- if (!haveSIZ) {
- error(getPos(), "Missing SIZ marker segment in JPX stream");
- return gFalse;
- }
- if (!haveCOD) {
- error(getPos(), "Missing COD marker segment in JPX stream");
- return gFalse;
- }
- if (!haveQCD) {
- error(getPos(), "Missing QCD marker segment in JPX stream");
- return gFalse;
- }
-
- //----- read the tile-parts
- while (1) {
- if (!readTilePart()) {
- return gFalse;
- }
- if (!readMarkerHdr(&segType, &segLen)) {
- error(getPos(), "Error in JPX codestream");
- return gFalse;
- }
- if (segType != 0x90) { // SOT - start of tile
- break;
- }
- }
-
- if (segType != 0xd9) { // EOC - end of codestream
- error(getPos(), "Missing EOC marker in JPX codestream");
- return gFalse;
- }
-
- //----- finish decoding the image
- for (i = 0; i < img.nXTiles * img.nYTiles; ++i) {
- tile = &img.tiles[i];
- for (comp = 0; comp < img.nComps; ++comp) {
- tileComp = &tile->tileComps[comp];
- inverseTransform(tileComp);
- }
- if (!inverseMultiCompAndDC(tile)) {
- return gFalse;
- }
- }
-
- //~ can free memory below tileComps here, and also tileComp.buf
-
- return gTrue;
-}
-
-GBool JPXStream::readTilePart() {
- JPXTile *tile;
- JPXTileComp *tileComp;
- JPXResLevel *resLevel;
- JPXPrecinct *precinct;
- JPXSubband *subband;
- JPXCodeBlock *cb;
- GBool haveSOD;
- Guint tileIdx, tilePartLen, tilePartIdx, nTileParts;
- GBool tilePartToEOC;
- Guint precinctSize, style;
- Guint n, nSBs, nx, ny, sbx0, sby0, comp, segLen;
- Guint i, j, k, cbX, cbY, r, pre, sb, cbi;
- int segType, level;
-
- // process the SOT marker segment
- if (!readUWord(&tileIdx) ||
- !readULong(&tilePartLen) ||
- !readUByte(&tilePartIdx) ||
- !readUByte(&nTileParts)) {
- error(getPos(), "Error in JPX SOT marker segment");
- return gFalse;
- }
-
- if (tileIdx >= img.nXTiles * img.nYTiles) {
- error(getPos(), "Weird tile index in JPX stream");
- return gFalse;
- }
-
- tilePartToEOC = tilePartLen == 0;
- tilePartLen -= 12; // subtract size of SOT segment
-
- haveSOD = gFalse;
- do {
- if (!readMarkerHdr(&segType, &segLen)) {
- error(getPos(), "Error in JPX tile-part codestream");
- return gFalse;
- }
- tilePartLen -= 2 + segLen;
- switch (segType) {
- case 0x52: // COD - coding style default
- if (!readUByte(&img.tiles[tileIdx].tileComps[0].style) ||
- !readUByte(&img.tiles[tileIdx].progOrder) ||
- !readUWord(&img.tiles[tileIdx].nLayers) ||
- !readUByte(&img.tiles[tileIdx].multiComp) ||
- !readUByte(&img.tiles[tileIdx].tileComps[0].nDecompLevels) ||
- !readUByte(&img.tiles[tileIdx].tileComps[0].codeBlockW) ||
- !readUByte(&img.tiles[tileIdx].tileComps[0].codeBlockH) ||
- !readUByte(&img.tiles[tileIdx].tileComps[0].codeBlockStyle) ||
- !readUByte(&img.tiles[tileIdx].tileComps[0].transform)) {
- error(getPos(), "Error in JPX COD marker segment");
- return gFalse;
- }
- img.tiles[tileIdx].tileComps[0].codeBlockW += 2;
- img.tiles[tileIdx].tileComps[0].codeBlockH += 2;
- for (comp = 0; comp < img.nComps; ++comp) {
- if (comp != 0) {
- img.tiles[tileIdx].tileComps[comp].style =
- img.tiles[tileIdx].tileComps[0].style;
- img.tiles[tileIdx].tileComps[comp].nDecompLevels =
- img.tiles[tileIdx].tileComps[0].nDecompLevels;
- img.tiles[tileIdx].tileComps[comp].codeBlockW =
- img.tiles[tileIdx].tileComps[0].codeBlockW;
- img.tiles[tileIdx].tileComps[comp].codeBlockH =
- img.tiles[tileIdx].tileComps[0].codeBlockH;
- img.tiles[tileIdx].tileComps[comp].codeBlockStyle =
- img.tiles[tileIdx].tileComps[0].codeBlockStyle;
- img.tiles[tileIdx].tileComps[comp].transform =
- img.tiles[tileIdx].tileComps[0].transform;
- }
- img.tiles[tileIdx].tileComps[comp].resLevels =
- (JPXResLevel *)greallocn(
- img.tiles[tileIdx].tileComps[comp].resLevels,
- (img.tiles[tileIdx].tileComps[comp].nDecompLevels + 1),
- sizeof(JPXResLevel));
- for (r = 0;
- r <= img.tiles[tileIdx].tileComps[comp].nDecompLevels;
- ++r) {
- img.tiles[tileIdx].tileComps[comp].resLevels[r].precincts = NULL;
- }
- }
- for (r = 0; r <= img.tiles[tileIdx].tileComps[0].nDecompLevels; ++r) {
- if (img.tiles[tileIdx].tileComps[0].style & 0x01) {
- if (!readUByte(&precinctSize)) {
- error(getPos(), "Error in JPX COD marker segment");
- return gFalse;
- }
- img.tiles[tileIdx].tileComps[0].resLevels[r].precinctWidth =
- precinctSize & 0x0f;
- img.tiles[tileIdx].tileComps[0].resLevels[r].precinctHeight =
- (precinctSize >> 4) & 0x0f;
- } else {
- img.tiles[tileIdx].tileComps[0].resLevels[r].precinctWidth = 15;
- img.tiles[tileIdx].tileComps[0].resLevels[r].precinctHeight = 15;
- }
- }
- for (comp = 1; comp < img.nComps; ++comp) {
- for (r = 0;
- r <= img.tiles[tileIdx].tileComps[comp].nDecompLevels;
- ++r) {
- img.tiles[tileIdx].tileComps[comp].resLevels[r].precinctWidth =
- img.tiles[tileIdx].tileComps[0].resLevels[r].precinctWidth;
- img.tiles[tileIdx].tileComps[comp].resLevels[r].precinctHeight =
- img.tiles[tileIdx].tileComps[0].resLevels[r].precinctHeight;
- }
- }
- break;
- case 0x53: // COC - coding style component
- if ((img.nComps > 256 && !readUWord(&comp)) ||
- (img.nComps <= 256 && !readUByte(&comp)) ||
- comp >= img.nComps ||
- !readUByte(&style) ||
- !readUByte(&img.tiles[tileIdx].tileComps[comp].nDecompLevels) ||
- !readUByte(&img.tiles[tileIdx].tileComps[comp].codeBlockW) ||
- !readUByte(&img.tiles[tileIdx].tileComps[comp].codeBlockH) ||
- !readUByte(&img.tiles[tileIdx].tileComps[comp].codeBlockStyle) ||
- !readUByte(&img.tiles[tileIdx].tileComps[comp].transform)) {
- error(getPos(), "Error in JPX COC marker segment");
- return gFalse;
- }
- img.tiles[tileIdx].tileComps[comp].style =
- (img.tiles[tileIdx].tileComps[comp].style & ~1) | (style & 1);
- img.tiles[tileIdx].tileComps[comp].codeBlockW += 2;
- img.tiles[tileIdx].tileComps[comp].codeBlockH += 2;
- img.tiles[tileIdx].tileComps[comp].resLevels =
- (JPXResLevel *)greallocn(
- img.tiles[tileIdx].tileComps[comp].resLevels,
- (img.tiles[tileIdx].tileComps[comp].nDecompLevels + 1),
- sizeof(JPXResLevel));
- for (r = 0; r <= img.tiles[tileIdx].tileComps[comp].nDecompLevels; ++r) {
- img.tiles[tileIdx].tileComps[comp].resLevels[r].precincts = NULL;
- }
- for (r = 0; r <= img.tiles[tileIdx].tileComps[comp].nDecompLevels; ++r) {
- if (img.tiles[tileIdx].tileComps[comp].style & 0x01) {
- if (!readUByte(&precinctSize)) {
- error(getPos(), "Error in JPX COD marker segment");
- return gFalse;
- }
- img.tiles[tileIdx].tileComps[comp].resLevels[r].precinctWidth =
- precinctSize & 0x0f;
- img.tiles[tileIdx].tileComps[comp].resLevels[r].precinctHeight =
- (precinctSize >> 4) & 0x0f;
- } else {
- img.tiles[tileIdx].tileComps[comp].resLevels[r].precinctWidth = 15;
- img.tiles[tileIdx].tileComps[comp].resLevels[r].precinctHeight = 15;
- }
- }
- break;
- case 0x5c: // QCD - quantization default
- if (!readUByte(&img.tiles[tileIdx].tileComps[0].quantStyle)) {
- error(getPos(), "Error in JPX QCD marker segment");
- return gFalse;
- }
- if ((img.tiles[tileIdx].tileComps[0].quantStyle & 0x1f) == 0x00) {
- img.tiles[tileIdx].tileComps[0].nQuantSteps =
- segLen - 3;
- img.tiles[tileIdx].tileComps[0].quantSteps =
- (Guint *)greallocn(img.tiles[tileIdx].tileComps[0].quantSteps,
- img.tiles[tileIdx].tileComps[0].nQuantSteps,
- sizeof(Guint));
- for (i = 0; i < img.tiles[tileIdx].tileComps[0].nQuantSteps; ++i) {
- if (!readUByte(&img.tiles[tileIdx].tileComps[0].quantSteps[i])) {
- error(getPos(), "Error in JPX QCD marker segment");
- return gFalse;
- }
- }
- } else if ((img.tiles[tileIdx].tileComps[0].quantStyle & 0x1f) == 0x01) {
- img.tiles[tileIdx].tileComps[0].nQuantSteps = 1;
- img.tiles[tileIdx].tileComps[0].quantSteps =
- (Guint *)greallocn(img.tiles[tileIdx].tileComps[0].quantSteps,
- img.tiles[tileIdx].tileComps[0].nQuantSteps,
- sizeof(Guint));
- if (!readUWord(&img.tiles[tileIdx].tileComps[0].quantSteps[0])) {
- error(getPos(), "Error in JPX QCD marker segment");
- return gFalse;
- }
- } else if ((img.tiles[tileIdx].tileComps[0].quantStyle & 0x1f) == 0x02) {
- img.tiles[tileIdx].tileComps[0].nQuantSteps = (segLen - 3) / 2;
- img.tiles[tileIdx].tileComps[0].quantSteps =
- (Guint *)greallocn(img.tiles[tileIdx].tileComps[0].quantSteps,
- img.tiles[tileIdx].tileComps[0].nQuantSteps,
- sizeof(Guint));
- for (i = 0; i < img.tiles[tileIdx].tileComps[0].nQuantSteps; ++i) {
- if (!readUWord(&img.tiles[tileIdx].tileComps[0].quantSteps[i])) {
- error(getPos(), "Error in JPX QCD marker segment");
- return gFalse;
- }
- }
- } else {
- error(getPos(), "Error in JPX QCD marker segment");
- return gFalse;
- }
- for (comp = 1; comp < img.nComps; ++comp) {
- img.tiles[tileIdx].tileComps[comp].quantStyle =
- img.tiles[tileIdx].tileComps[0].quantStyle;
- img.tiles[tileIdx].tileComps[comp].nQuantSteps =
- img.tiles[tileIdx].tileComps[0].nQuantSteps;
- img.tiles[tileIdx].tileComps[comp].quantSteps =
- (Guint *)greallocn(img.tiles[tileIdx].tileComps[comp].quantSteps,
- img.tiles[tileIdx].tileComps[0].nQuantSteps,
- sizeof(Guint));
- for (j = 0; j < img.tiles[tileIdx].tileComps[0].nQuantSteps; ++j) {
- img.tiles[tileIdx].tileComps[comp].quantSteps[j] =
- img.tiles[tileIdx].tileComps[0].quantSteps[j];
- }
- }
- break;
- case 0x5d: // QCC - quantization component
- if ((img.nComps > 256 && !readUWord(&comp)) ||
- (img.nComps <= 256 && !readUByte(&comp)) ||
- comp >= img.nComps ||
- !readUByte(&img.tiles[tileIdx].tileComps[comp].quantStyle)) {
- error(getPos(), "Error in JPX QCC marker segment");
- return gFalse;
- }
- if ((img.tiles[tileIdx].tileComps[comp].quantStyle & 0x1f) == 0x00) {
- img.tiles[tileIdx].tileComps[comp].nQuantSteps =
- segLen - (img.nComps > 256 ? 5 : 4);
- img.tiles[tileIdx].tileComps[comp].quantSteps =
- (Guint *)greallocn(img.tiles[tileIdx].tileComps[comp].quantSteps,
- img.tiles[tileIdx].tileComps[comp].nQuantSteps,
- sizeof(Guint));
- for (i = 0; i < img.tiles[tileIdx].tileComps[comp].nQuantSteps; ++i) {
- if (!readUByte(&img.tiles[tileIdx].tileComps[comp].quantSteps[i])) {
- error(getPos(), "Error in JPX QCC marker segment");
- return gFalse;
- }
- }
- } else if ((img.tiles[tileIdx].tileComps[comp].quantStyle & 0x1f)
- == 0x01) {
- img.tiles[tileIdx].tileComps[comp].nQuantSteps = 1;
- img.tiles[tileIdx].tileComps[comp].quantSteps =
- (Guint *)greallocn(img.tiles[tileIdx].tileComps[comp].quantSteps,
- img.tiles[tileIdx].tileComps[comp].nQuantSteps,
- sizeof(Guint));
- if (!readUWord(&img.tiles[tileIdx].tileComps[comp].quantSteps[0])) {
- error(getPos(), "Error in JPX QCC marker segment");
- return gFalse;
- }
- } else if ((img.tiles[tileIdx].tileComps[comp].quantStyle & 0x1f)
- == 0x02) {
- img.tiles[tileIdx].tileComps[comp].nQuantSteps =
- (segLen - (img.nComps > 256 ? 5 : 4)) / 2;
- img.tiles[tileIdx].tileComps[comp].quantSteps =
- (Guint *)greallocn(img.tiles[tileIdx].tileComps[comp].quantSteps,
- img.tiles[tileIdx].tileComps[comp].nQuantSteps,
- sizeof(Guint));
- for (i = 0; i < img.tiles[tileIdx].tileComps[comp].nQuantSteps; ++i) {
- if (!readUWord(&img.tiles[tileIdx].tileComps[comp].quantSteps[i])) {
- error(getPos(), "Error in JPX QCD marker segment");
- return gFalse;
- }
- }
- } else {
- error(getPos(), "Error in JPX QCC marker segment");
- return gFalse;
- }
- break;
- case 0x5e: // RGN - region of interest
-#if 1 //~ ROI is unimplemented
- fprintf(stderr, "RGN\n");
- for (i = 0; i < segLen - 2; ++i) {
- if (str->getChar() == EOF) {
- error(getPos(), "Error in JPX PPM marker segment");
- return gFalse;
- }
- }
-#else
- if ((img.nComps > 256 && !readUWord(&comp)) ||
- (img.nComps <= 256 && !readUByte(&comp)) ||
- comp >= img.nComps ||
- !readUByte(&compInfo[comp].roi.style) ||
- !readUByte(&compInfo[comp].roi.shift)) {
- error(getPos(), "Error in JPX RGN marker segment");
- return gFalse;
- }
-#endif
- break;
- case 0x5f: // POC - progression order change
-#if 1 //~ progression order changes are unimplemented
- fprintf(stderr, "POC\n");
- for (i = 0; i < segLen - 2; ++i) {
- if (str->getChar() == EOF) {
- error(getPos(), "Error in JPX PPM marker segment");
- return gFalse;
- }
- }
-#else
- nTileProgs = (segLen - 2) / (img.nComps > 256 ? 9 : 7);
- tileProgs = (JPXProgOrder *)gmallocn(nTileProgs, sizeof(JPXProgOrder));
- for (i = 0; i < nTileProgs; ++i) {
- if (!readUByte(&tileProgs[i].startRes) ||
- !(img.nComps > 256 && readUWord(&tileProgs[i].startComp)) ||
- !(img.nComps <= 256 && readUByte(&tileProgs[i].startComp)) ||
- !readUWord(&tileProgs[i].endLayer) ||
- !readUByte(&tileProgs[i].endRes) ||
- !(img.nComps > 256 && readUWord(&tileProgs[i].endComp)) ||
- !(img.nComps <= 256 && readUByte(&tileProgs[i].endComp)) ||
- !readUByte(&tileProgs[i].progOrder)) {
- error(getPos(), "Error in JPX POC marker segment");
- return gFalse;
- }
- }
-#endif
- break;
- case 0x61: // PPT - packed packet headers, tile-part hdr
-#if 1 //~ packed packet headers are unimplemented
- fprintf(stderr, "PPT\n");
- for (i = 0; i < segLen - 2; ++i) {
- if (str->getChar() == EOF) {
- error(getPos(), "Error in JPX PPT marker segment");
- return gFalse;
- }
- }
-#endif
- case 0x58: // PLT - packet length, tile-part header
- // skipped
- for (i = 0; i < segLen - 2; ++i) {
- if (str->getChar() == EOF) {
- error(getPos(), "Error in JPX PLT marker segment");
- return gFalse;
- }
- }
- break;
- case 0x64: // COM - comment
- // skipped
- for (i = 0; i < segLen - 2; ++i) {
- if (str->getChar() == EOF) {
- error(getPos(), "Error in JPX COM marker segment");
- return gFalse;
- }
- }
- break;
- case 0x93: // SOD - start of data
- haveSOD = gTrue;
- break;
- default:
- error(getPos(), "Unknown marker segment %02x in JPX tile-part stream",
- segType);
- for (i = 0; i < segLen - 2; ++i) {
- if (str->getChar() == EOF) {
- break;
- }
- }
- break;
- }
- } while (!haveSOD);
-
- //----- initialize the tile, precincts, and code-blocks
- if (tilePartIdx == 0) {
- tile = &img.tiles[tileIdx];
- i = tileIdx / img.nXTiles;
- j = tileIdx % img.nXTiles;
- if ((tile->x0 = img.xTileOffset + j * img.xTileSize) < img.xOffset) {
- tile->x0 = img.xOffset;
- }
- if ((tile->y0 = img.yTileOffset + i * img.yTileSize) < img.yOffset) {
- tile->y0 = img.yOffset;
- }
- if ((tile->x1 = img.xTileOffset + (j + 1) * img.xTileSize) > img.xSize) {
- tile->x1 = img.xSize;
- }
- if ((tile->y1 = img.yTileOffset + (i + 1) * img.yTileSize) > img.ySize) {
- tile->y1 = img.ySize;
- }
- tile->comp = 0;
- tile->res = 0;
- tile->precinct = 0;
- tile->layer = 0;
- tile->maxNDecompLevels = 0;
- for (comp = 0; comp < img.nComps; ++comp) {
- tileComp = &tile->tileComps[comp];
- if (tileComp->nDecompLevels > tile->maxNDecompLevels) {
- tile->maxNDecompLevels = tileComp->nDecompLevels;
- }
- tileComp->x0 = jpxCeilDiv(tile->x0, tileComp->hSep);
- tileComp->y0 = jpxCeilDiv(tile->y0, tileComp->hSep);
- tileComp->x1 = jpxCeilDiv(tile->x1, tileComp->hSep);
- tileComp->y1 = jpxCeilDiv(tile->y1, tileComp->hSep);
- tileComp->cbW = 1 << tileComp->codeBlockW;
- tileComp->cbH = 1 << tileComp->codeBlockH;
- tileComp->data = (int *)gmallocn((tileComp->x1 - tileComp->x0) *
- (tileComp->y1 - tileComp->y0),
- sizeof(int));
- if (tileComp->x1 - tileComp->x0 > tileComp->y1 - tileComp->y0) {
- n = tileComp->x1 - tileComp->x0;
- } else {
- n = tileComp->y1 - tileComp->y0;
- }
- tileComp->buf = (int *)gmallocn(n + 8, sizeof(int));
- for (r = 0; r <= tileComp->nDecompLevels; ++r) {
- resLevel = &tileComp->resLevels[r];
- k = r == 0 ? tileComp->nDecompLevels
- : tileComp->nDecompLevels - r + 1;
- resLevel->x0 = jpxCeilDivPow2(tileComp->x0, k);
- resLevel->y0 = jpxCeilDivPow2(tileComp->y0, k);
- resLevel->x1 = jpxCeilDivPow2(tileComp->x1, k);
- resLevel->y1 = jpxCeilDivPow2(tileComp->y1, k);
- if (r == 0) {
- resLevel->bx0[0] = resLevel->x0;
- resLevel->by0[0] = resLevel->y0;
- resLevel->bx1[0] = resLevel->x1;
- resLevel->by1[0] = resLevel->y1;
- } else {
- resLevel->bx0[0] = jpxCeilDivPow2(tileComp->x0 - (1 << (k-1)), k);
- resLevel->by0[0] = resLevel->y0;
- resLevel->bx1[0] = jpxCeilDivPow2(tileComp->x1 - (1 << (k-1)), k);
- resLevel->by1[0] = resLevel->y1;
- resLevel->bx0[1] = resLevel->x0;
- resLevel->by0[1] = jpxCeilDivPow2(tileComp->y0 - (1 << (k-1)), k);
- resLevel->bx1[1] = resLevel->x1;
- resLevel->by1[1] = jpxCeilDivPow2(tileComp->y1 - (1 << (k-1)), k);
- resLevel->bx0[2] = jpxCeilDivPow2(tileComp->x0 - (1 << (k-1)), k);
- resLevel->by0[2] = jpxCeilDivPow2(tileComp->y0 - (1 << (k-1)), k);
- resLevel->bx1[2] = jpxCeilDivPow2(tileComp->x1 - (1 << (k-1)), k);
- resLevel->by1[2] = jpxCeilDivPow2(tileComp->y1 - (1 << (k-1)), k);
- }
- resLevel->precincts = (JPXPrecinct *)gmallocn(1, sizeof(JPXPrecinct));
- for (pre = 0; pre < 1; ++pre) {
- precinct = &resLevel->precincts[pre];
- precinct->x0 = resLevel->x0;
- precinct->y0 = resLevel->y0;
- precinct->x1 = resLevel->x1;
- precinct->y1 = resLevel->y1;
- nSBs = r == 0 ? 1 : 3;
- precinct->subbands =
- (JPXSubband *)gmallocn(nSBs, sizeof(JPXSubband));
- for (sb = 0; sb < nSBs; ++sb) {
- subband = &precinct->subbands[sb];
- subband->x0 = resLevel->bx0[sb];
- subband->y0 = resLevel->by0[sb];
- subband->x1 = resLevel->bx1[sb];
- subband->y1 = resLevel->by1[sb];
- subband->nXCBs = jpxCeilDivPow2(subband->x1,
- tileComp->codeBlockW)
- - jpxFloorDivPow2(subband->x0,
- tileComp->codeBlockW);
- subband->nYCBs = jpxCeilDivPow2(subband->y1,
- tileComp->codeBlockH)
- - jpxFloorDivPow2(subband->y0,
- tileComp->codeBlockH);
- n = subband->nXCBs > subband->nYCBs ? subband->nXCBs
- : subband->nYCBs;
- for (subband->maxTTLevel = 0, --n;
- n;
- ++subband->maxTTLevel, n >>= 1) ;
- n = 0;
- for (level = subband->maxTTLevel; level >= 0; --level) {
- nx = jpxCeilDivPow2(subband->nXCBs, level);
- ny = jpxCeilDivPow2(subband->nYCBs, level);
- n += nx * ny;
- }
- subband->inclusion =
- (JPXTagTreeNode *)gmallocn(n, sizeof(JPXTagTreeNode));
- subband->zeroBitPlane =
- (JPXTagTreeNode *)gmallocn(n, sizeof(JPXTagTreeNode));
- for (k = 0; k < n; ++k) {
- subband->inclusion[k].finished = gFalse;
- subband->inclusion[k].val = 0;
- subband->zeroBitPlane[k].finished = gFalse;
- subband->zeroBitPlane[k].val = 0;
- }
- subband->cbs = (JPXCodeBlock *)gmallocn(subband->nXCBs *
- subband->nYCBs,
- sizeof(JPXCodeBlock));
- sbx0 = jpxFloorDivPow2(subband->x0, tileComp->codeBlockW);
- sby0 = jpxFloorDivPow2(subband->y0, tileComp->codeBlockH);
- cb = subband->cbs;
- for (cbY = 0; cbY < subband->nYCBs; ++cbY) {
- for (cbX = 0; cbX < subband->nXCBs; ++cbX) {
- cb->x0 = (sbx0 + cbX) << tileComp->codeBlockW;
- cb->x1 = cb->x0 + tileComp->cbW;
- if (subband->x0 > cb->x0) {
- cb->x0 = subband->x0;
- }
- if (subband->x1 < cb->x1) {
- cb->x1 = subband->x1;
- }
- cb->y0 = (sby0 + cbY) << tileComp->codeBlockH;
- cb->y1 = cb->y0 + tileComp->cbH;
- if (subband->y0 > cb->y0) {
- cb->y0 = subband->y0;
- }
- if (subband->y1 < cb->y1) {
- cb->y1 = subband->y1;
- }
- cb->seen = gFalse;
- cb->lBlock = 3;
- cb->nextPass = jpxPassCleanup;
- cb->nZeroBitPlanes = 0;
- cb->coeffs =
- (JPXCoeff *)gmallocn((1 << (tileComp->codeBlockW
- + tileComp->codeBlockH)),
- sizeof(JPXCoeff));
- for (cbi = 0;
- cbi < (Guint)(1 << (tileComp->codeBlockW
- + tileComp->codeBlockH));
- ++cbi) {
- cb->coeffs[cbi].flags = 0;
- cb->coeffs[cbi].len = 0;
- cb->coeffs[cbi].mag = 0;
- }
- cb->arithDecoder = NULL;
- cb->stats = NULL;
- ++cb;
- }
- }
- }
- }
- }
- }
- }
-
- return readTilePartData(tileIdx, tilePartLen, tilePartToEOC);
-}
-
-GBool JPXStream::readTilePartData(Guint tileIdx,
- Guint tilePartLen, GBool tilePartToEOC) {
- JPXTile *tile;
- JPXTileComp *tileComp;
- JPXResLevel *resLevel;
- JPXPrecinct *precinct;
- JPXSubband *subband;
- JPXCodeBlock *cb;
- Guint ttVal;
- Guint bits, cbX, cbY, nx, ny, i, j, n, sb;
- int level;
-
- tile = &img.tiles[tileIdx];
-
- // read all packets from this tile-part
- while (1) {
- if (tilePartToEOC) {
- //~ peek for an EOC marker
- } else if (tilePartLen == 0) {
- break;
- }
-
- tileComp = &tile->tileComps[tile->comp];
- resLevel = &tileComp->resLevels[tile->res];
- precinct = &resLevel->precincts[tile->precinct];
-
- //----- packet header
-
- // zero-length flag
- if (!readBits(1, &bits)) {
- goto err;
- }
- if (!bits) {
- // packet is empty -- clear all code-block inclusion flags
- for (sb = 0; sb < (tile->res == 0 ? 1 : 3); ++sb) {
- subband = &precinct->subbands[sb];
- for (cbY = 0; cbY < subband->nYCBs; ++cbY) {
- for (cbX = 0; cbX < subband->nXCBs; ++cbX) {
- cb = &subband->cbs[cbY * subband->nXCBs + cbX];
- cb->included = gFalse;
- }
- }
- }
- } else {
-
- for (sb = 0; sb < (tile->res == 0 ? 1 : 3); ++sb) {
- subband = &precinct->subbands[sb];
- for (cbY = 0; cbY < subband->nYCBs; ++cbY) {
- for (cbX = 0; cbX < subband->nXCBs; ++cbX) {
- cb = &subband->cbs[cbY * subband->nXCBs + cbX];
-
- // skip code-blocks with no coefficients
- if (cb->x0 >= cb->x1 || cb->y0 >= cb->y1) {
- cb->included = gFalse;
- continue;
- }
-
- // code-block inclusion
- if (cb->seen) {
- if (!readBits(1, &cb->included)) {
- goto err;
- }
- } else {
- ttVal = 0;
- i = 0;
- for (level = subband->maxTTLevel; level >= 0; --level) {
- nx = jpxCeilDivPow2(subband->nXCBs, level);
- ny = jpxCeilDivPow2(subband->nYCBs, level);
- j = i + (cbY >> level) * nx + (cbX >> level);
- if (!subband->inclusion[j].finished &&
- !subband->inclusion[j].val) {
- subband->inclusion[j].val = ttVal;
- } else {
- ttVal = subband->inclusion[j].val;
- }
- while (!subband->inclusion[j].finished &&
- ttVal <= tile->layer) {
- if (!readBits(1, &bits)) {
- goto err;
- }
- if (bits == 1) {
- subband->inclusion[j].finished = gTrue;
- } else {
- ++ttVal;
- }
- }
- subband->inclusion[j].val = ttVal;
- if (ttVal > tile->layer) {
- break;
- }
- i += nx * ny;
- }
- cb->included = level < 0;
- }
-
- if (cb->included) {
-
- // zero bit-plane count
- if (!cb->seen) {
- ttVal = 0;
- i = 0;
- for (level = subband->maxTTLevel; level >= 0; --level) {
- nx = jpxCeilDivPow2(subband->nXCBs, level);
- ny = jpxCeilDivPow2(subband->nYCBs, level);
- j = i + (cbY >> level) * nx + (cbX >> level);
- if (!subband->zeroBitPlane[j].finished &&
- !subband->zeroBitPlane[j].val) {
- subband->zeroBitPlane[j].val = ttVal;
- } else {
- ttVal = subband->zeroBitPlane[j].val;
- }
- while (!subband->zeroBitPlane[j].finished) {
- if (!readBits(1, &bits)) {
- goto err;
- }
- if (bits == 1) {
- subband->zeroBitPlane[j].finished = gTrue;
- } else {
- ++ttVal;
- }
- }
- subband->zeroBitPlane[j].val = ttVal;
- i += nx * ny;
- }
- cb->nZeroBitPlanes = ttVal;
- }
-
- // number of coding passes
- if (!readBits(1, &bits)) {
- goto err;
- }
- if (bits == 0) {
- cb->nCodingPasses = 1;
- } else {
- if (!readBits(1, &bits)) {
- goto err;
- }
- if (bits == 0) {
- cb->nCodingPasses = 2;
- } else {
- if (!readBits(2, &bits)) {
- goto err;
- }
- if (bits < 3) {
- cb->nCodingPasses = 3 + bits;
- } else {
- if (!readBits(5, &bits)) {
- goto err;
- }
- if (bits < 31) {
- cb->nCodingPasses = 6 + bits;
- } else {
- if (!readBits(7, &bits)) {
- goto err;
- }
- cb->nCodingPasses = 37 + bits;
- }
- }
- }
- }
-
- // update Lblock
- while (1) {
- if (!readBits(1, &bits)) {
- goto err;
- }
- if (!bits) {
- break;
- }
- ++cb->lBlock;
- }
-
- // length of compressed data
- //~ deal with multiple codeword segments
- for (n = cb->lBlock, i = cb->nCodingPasses >> 1;
- i;
- ++n, i >>= 1) ;
- if (!readBits(n, &cb->dataLen)) {
- goto err;
- }
- }
- }
- }
- }
- }
- tilePartLen -= byteCount;
- clearBitBuf();
-
- //----- packet data
-
- for (sb = 0; sb < (tile->res == 0 ? 1 : 3); ++sb) {
- subband = &precinct->subbands[sb];
- for (cbY = 0; cbY < subband->nYCBs; ++cbY) {
- for (cbX = 0; cbX < subband->nXCBs; ++cbX) {
- cb = &subband->cbs[cbY * subband->nXCBs + cbX];
- if (cb->included) {
- if (!readCodeBlockData(tileComp, resLevel, precinct, subband,
- tile->res, sb, cb)) {
- return gFalse;
- }
- tilePartLen -= cb->dataLen;
- cb->seen = gTrue;
- }
- }
- }
- }
-
- //----- next packet
-
- switch (tile->progOrder) {
- case 0: // layer, resolution level, component, precinct
- if (++tile->comp == img.nComps) {
- tile->comp = 0;
- if (++tile->res == tile->maxNDecompLevels + 1) {
- tile->res = 0;
- if (++tile->layer == tile->nLayers) {
- tile->layer = 0;
- }
- }
- }
- break;
- case 1: // resolution level, layer, component, precinct
- if (++tile->comp == img.nComps) {
- tile->comp = 0;
- if (++tile->layer == tile->nLayers) {
- tile->layer = 0;
- if (++tile->res == tile->maxNDecompLevels + 1) {
- tile->res = 0;
- }
- }
- }
- break;
- case 2: // resolution level, precinct, component, layer
- //~ this isn't correct -- see B.12.1.3
- if (++tile->layer == tile->nLayers) {
- tile->layer = 0;
- if (++tile->comp == img.nComps) {
- tile->comp = 0;
- if (++tile->res == tile->maxNDecompLevels + 1) {
- tile->res = 0;
- }
- }
- }
- break;
- case 3: // precinct, component, resolution level, layer
- //~ this isn't correct -- see B.12.1.4
- if (++tile->layer == tile->nLayers) {
- tile->layer = 0;
- if (++tile->res == tile->maxNDecompLevels + 1) {
- tile->res = 0;
- if (++tile->comp == img.nComps) {
- tile->comp = 0;
- }
- }
- }
- break;
- case 4: // component, precinct, resolution level, layer
- //~ this isn't correct -- see B.12.1.5
- if (++tile->layer == tile->nLayers) {
- tile->layer = 0;
- if (++tile->res == tile->maxNDecompLevels + 1) {
- tile->res = 0;
- if (++tile->comp == img.nComps) {
- tile->comp = 0;
- }
- }
- }
- break;
- }
- }
-
- return gTrue;
-
- err:
- error(getPos(), "Error in JPX stream");
- return gFalse;
-}
-
-GBool JPXStream::readCodeBlockData(JPXTileComp *tileComp,
- JPXResLevel *resLevel,
- JPXPrecinct *precinct,
- JPXSubband *subband,
- Guint res, Guint sb,
- JPXCodeBlock *cb) {
- JPXCoeff *coeff0, *coeff1, *coeff;
- Guint horiz, vert, diag, all, cx, xorBit;
- int horizSign, vertSign;
- Guint i, x, y0, y1, y2;
-
- if (cb->arithDecoder) {
- cb->arithDecoder->restart(cb->dataLen);
- } else {
- cb->arithDecoder = new JArithmeticDecoder();
- cb->arithDecoder->setStream(str, cb->dataLen);
- cb->arithDecoder->start();
- cb->stats = new JArithmeticDecoderStats(jpxNContexts);
- cb->stats->setEntry(jpxContextSigProp, 4, 0);
- cb->stats->setEntry(jpxContextRunLength, 3, 0);
- cb->stats->setEntry(jpxContextUniform, 46, 0);
- }
-
- for (i = 0; i < cb->nCodingPasses; ++i) {
- switch (cb->nextPass) {
-
- //----- significance propagation pass
- case jpxPassSigProp:
- for (y0 = cb->y0, coeff0 = cb->coeffs;
- y0 < cb->y1;
- y0 += 4, coeff0 += 4 << tileComp->codeBlockW) {
- for (x = cb->x0, coeff1 = coeff0;
- x < cb->x1;
- ++x, ++coeff1) {
- for (y1 = 0, coeff = coeff1;
- y1 < 4 && y0+y1 < cb->y1;
- ++y1, coeff += tileComp->cbW) {
- if (!(coeff->flags & jpxCoeffSignificant)) {
- horiz = vert = diag = 0;
- horizSign = vertSign = 2;
- if (x > cb->x0) {
- if (coeff[-1].flags & jpxCoeffSignificant) {
- ++horiz;
- horizSign += (coeff[-1].flags & jpxCoeffSign) ? -1 : 1;
- }
- if (y0+y1 > cb->y0) {
- diag += (coeff[-(int)tileComp->cbW - 1].flags
- >> jpxCoeffSignificantB) & 1;
- }
- if (y0+y1 < cb->y1 - 1) {
- diag += (coeff[tileComp->cbW - 1].flags
- >> jpxCoeffSignificantB) & 1;
- }
- }
- if (x < cb->x1 - 1) {
- if (coeff[1].flags & jpxCoeffSignificant) {
- ++horiz;
- horizSign += (coeff[1].flags & jpxCoeffSign) ? -1 : 1;
- }
- if (y0+y1 > cb->y0) {
- diag += (coeff[-(int)tileComp->cbW + 1].flags
- >> jpxCoeffSignificantB) & 1;
- }
- if (y0+y1 < cb->y1 - 1) {
- diag += (coeff[tileComp->cbW + 1].flags
- >> jpxCoeffSignificantB) & 1;
- }
- }
- if (y0+y1 > cb->y0) {
- if (coeff[-(int)tileComp->cbW].flags & jpxCoeffSignificant) {
- ++vert;
- vertSign += (coeff[-(int)tileComp->cbW].flags & jpxCoeffSign)
- ? -1 : 1;
- }
- }
- if (y0+y1 < cb->y1 - 1) {
- if (coeff[tileComp->cbW].flags & jpxCoeffSignificant) {
- ++vert;
- vertSign += (coeff[tileComp->cbW].flags & jpxCoeffSign)
- ? -1 : 1;
- }
- }
- cx = sigPropContext[horiz][vert][diag][res == 0 ? 1 : sb];
- if (cx != 0) {
- if (cb->arithDecoder->decodeBit(cx, cb->stats)) {
- coeff->flags |= jpxCoeffSignificant | jpxCoeffFirstMagRef;
- coeff->mag = (coeff->mag << 1) | 1;
- cx = signContext[horizSign][vertSign][0];
- xorBit = signContext[horizSign][vertSign][1];
- if (cb->arithDecoder->decodeBit(cx, cb->stats) ^ xorBit) {
- coeff->flags |= jpxCoeffSign;
- }
- }
- ++coeff->len;
- coeff->flags |= jpxCoeffTouched;
- }
- }
- }
- }
- }
- ++cb->nextPass;
- break;
-
- //----- magnitude refinement pass
- case jpxPassMagRef:
- for (y0 = cb->y0, coeff0 = cb->coeffs;
- y0 < cb->y1;
- y0 += 4, coeff0 += 4 << tileComp->codeBlockW) {
- for (x = cb->x0, coeff1 = coeff0;
- x < cb->x1;
- ++x, ++coeff1) {
- for (y1 = 0, coeff = coeff1;
- y1 < 4 && y0+y1 < cb->y1;
- ++y1, coeff += tileComp->cbW) {
- if ((coeff->flags & jpxCoeffSignificant) &&
- !(coeff->flags & jpxCoeffTouched)) {
- if (coeff->flags & jpxCoeffFirstMagRef) {
- all = 0;
- if (x > cb->x0) {
- all += (coeff[-1].flags >> jpxCoeffSignificantB) & 1;
- if (y0+y1 > cb->y0) {
- all += (coeff[-(int)tileComp->cbW - 1].flags
- >> jpxCoeffSignificantB) & 1;
- }
- if (y0+y1 < cb->y1 - 1) {
- all += (coeff[tileComp->cbW - 1].flags
- >> jpxCoeffSignificantB) & 1;
- }
- }
- if (x < cb->x1 - 1) {
- all += (coeff[1].flags >> jpxCoeffSignificantB) & 1;
- if (y0+y1 > cb->y0) {
- all += (coeff[-(int)tileComp->cbW + 1].flags
- >> jpxCoeffSignificantB) & 1;
- }
- if (y0+y1 < cb->y1 - 1) {
- all += (coeff[tileComp->cbW + 1].flags
- >> jpxCoeffSignificantB) & 1;
- }
- }
- if (y0+y1 > cb->y0) {
- all += (coeff[-(int)tileComp->cbW].flags
- >> jpxCoeffSignificantB) & 1;
- }
- if (y0+y1 < cb->y1 - 1) {
- all += (coeff[tileComp->cbW].flags
- >> jpxCoeffSignificantB) & 1;
- }
- cx = all ? 15 : 14;
- } else {
- cx = 16;
- }
- coeff->mag = (coeff->mag << 1) |
- cb->arithDecoder->decodeBit(cx, cb->stats);
- ++coeff->len;
- coeff->flags |= jpxCoeffTouched;
- coeff->flags &= ~jpxCoeffFirstMagRef;
- }
- }
- }
- }
- ++cb->nextPass;
- break;
-
- //----- cleanup pass
- case jpxPassCleanup:
- for (y0 = cb->y0, coeff0 = cb->coeffs;
- y0 < cb->y1;
- y0 += 4, coeff0 += 4 << tileComp->codeBlockW) {
- for (x = cb->x0, coeff1 = coeff0;
- x < cb->x1;
- ++x, ++coeff1) {
- y1 = 0;
- if (y0 + 3 < cb->y1 &&
- !(coeff1->flags & jpxCoeffTouched) &&
- !(coeff1[tileComp->cbW].flags & jpxCoeffTouched) &&
- !(coeff1[2 * tileComp->cbW].flags & jpxCoeffTouched) &&
- !(coeff1[3 * tileComp->cbW].flags & jpxCoeffTouched) &&
- (x == cb->x0 || y0 == cb->y0 ||
- !(coeff1[-(int)tileComp->cbW - 1].flags
- & jpxCoeffSignificant)) &&
- (y0 == cb->y0 ||
- !(coeff1[-(int)tileComp->cbW].flags
- & jpxCoeffSignificant)) &&
- (x == cb->x1 - 1 || y0 == cb->y0 ||
- !(coeff1[-(int)tileComp->cbW + 1].flags
- & jpxCoeffSignificant)) &&
- (x == cb->x0 ||
- (!(coeff1[-1].flags & jpxCoeffSignificant) &&
- !(coeff1[tileComp->cbW - 1].flags
- & jpxCoeffSignificant) &&
- !(coeff1[2 * tileComp->cbW - 1].flags
- & jpxCoeffSignificant) &&
- !(coeff1[3 * tileComp->cbW - 1].flags
- & jpxCoeffSignificant))) &&
- (x == cb->x1 - 1 ||
- (!(coeff1[1].flags & jpxCoeffSignificant) &&
- !(coeff1[tileComp->cbW + 1].flags
- & jpxCoeffSignificant) &&
- !(coeff1[2 * tileComp->cbW + 1].flags
- & jpxCoeffSignificant) &&
- !(coeff1[3 * tileComp->cbW + 1].flags
- & jpxCoeffSignificant))) &&
- (x == cb->x0 || y0+4 == cb->y1 ||
- !(coeff1[4 * tileComp->cbW - 1].flags & jpxCoeffSignificant)) &&
- (y0+4 == cb->y1 ||
- !(coeff1[4 * tileComp->cbW].flags & jpxCoeffSignificant)) &&
- (x == cb->x1 - 1 || y0+4 == cb->y1 ||
- !(coeff1[4 * tileComp->cbW + 1].flags
- & jpxCoeffSignificant))) {
- if (cb->arithDecoder->decodeBit(jpxContextRunLength, cb->stats)) {
- y1 = cb->arithDecoder->decodeBit(jpxContextUniform, cb->stats);
- y1 = (y1 << 1) |
- cb->arithDecoder->decodeBit(jpxContextUniform, cb->stats);
- for (y2 = 0, coeff = coeff1;
- y2 < y1;
- ++y2, coeff += tileComp->cbW) {
- ++coeff->len;
- }
- coeff->flags |= jpxCoeffSignificant | jpxCoeffFirstMagRef;
- coeff->mag = (coeff->mag << 1) | 1;
- ++coeff->len;
- cx = signContext[2][2][0];
- xorBit = signContext[2][2][1];
- if (cb->arithDecoder->decodeBit(cx, cb->stats) ^ xorBit) {
- coeff->flags |= jpxCoeffSign;
- }
- ++y1;
- } else {
- for (y1 = 0, coeff = coeff1;
- y1 < 4;
- ++y1, coeff += tileComp->cbW) {
- ++coeff->len;
- }
- y1 = 4;
- }
- }
- for (coeff = &coeff1[y1 << tileComp->codeBlockW];
- y1 < 4 && y0 + y1 < cb->y1;
- ++y1, coeff += tileComp->cbW) {
- if (!(coeff->flags & jpxCoeffTouched)) {
- horiz = vert = diag = 0;
- horizSign = vertSign = 2;
- if (x > cb->x0) {
- if (coeff[-1].flags & jpxCoeffSignificant) {
- ++horiz;
- horizSign += (coeff[-1].flags & jpxCoeffSign) ? -1 : 1;
- }
- if (y0+y1 > cb->y0) {
- diag += (coeff[-(int)tileComp->cbW - 1].flags
- >> jpxCoeffSignificantB) & 1;
- }
- if (y0+y1 < cb->y1 - 1) {
- diag += (coeff[tileComp->cbW - 1].flags
- >> jpxCoeffSignificantB) & 1;
- }
- }
- if (x < cb->x1 - 1) {
- if (coeff[1].flags & jpxCoeffSignificant) {
- ++horiz;
- horizSign += (coeff[1].flags & jpxCoeffSign) ? -1 : 1;
- }
- if (y0+y1 > cb->y0) {
- diag += (coeff[-(int)tileComp->cbW + 1].flags
- >> jpxCoeffSignificantB) & 1;
- }
- if (y0+y1 < cb->y1 - 1) {
- diag += (coeff[tileComp->cbW + 1].flags
- >> jpxCoeffSignificantB) & 1;
- }
- }
- if (y0+y1 > cb->y0) {
- if (coeff[-(int)tileComp->cbW].flags & jpxCoeffSignificant) {
- ++vert;
- vertSign += (coeff[-(int)tileComp->cbW].flags & jpxCoeffSign)
- ? -1 : 1;
- }
- }
- if (y0+y1 < cb->y1 - 1) {
- if (coeff[tileComp->cbW].flags & jpxCoeffSignificant) {
- ++vert;
- vertSign += (coeff[tileComp->cbW].flags & jpxCoeffSign)
- ? -1 : 1;
- }
- }
- cx = sigPropContext[horiz][vert][diag][res == 0 ? 1 : sb];
- if (cb->arithDecoder->decodeBit(cx, cb->stats)) {
- coeff->flags |= jpxCoeffSignificant | jpxCoeffFirstMagRef;
- coeff->mag = (coeff->mag << 1) | 1;
- cx = signContext[horizSign][vertSign][0];
- xorBit = signContext[horizSign][vertSign][1];
- if (cb->arithDecoder->decodeBit(cx, cb->stats) ^ xorBit) {
- coeff->flags |= jpxCoeffSign;
- }
- }
- ++coeff->len;
- } else {
- coeff->flags &= ~jpxCoeffTouched;
- }
- }
- }
- }
- cb->nextPass = jpxPassSigProp;
- break;
- }
- }
-
- cb->arithDecoder->cleanup();
- return gTrue;
-}
-
-// Inverse quantization, and wavelet transform (IDWT). This also does
-// the initial shift to convert to fixed point format.
-void JPXStream::inverseTransform(JPXTileComp *tileComp) {
- JPXResLevel *resLevel;
- JPXPrecinct *precinct;
- JPXSubband *subband;
- JPXCodeBlock *cb;
- JPXCoeff *coeff0, *coeff;
- Guint qStyle, guard, eps, shift;
- int shift2;
- double mu;
- int val;
- int *dataPtr;
- Guint nx0, ny0, nx1, ny1;
- Guint r, cbX, cbY, x, y;
-
- //----- (NL)LL subband (resolution level 0)
-
- resLevel = &tileComp->resLevels[0];
- precinct = &resLevel->precincts[0];
- subband = &precinct->subbands[0];
-
- // i-quant parameters
- qStyle = tileComp->quantStyle & 0x1f;
- guard = (tileComp->quantStyle >> 5) & 7;
- if (qStyle == 0) {
- eps = (tileComp->quantSteps[0] >> 3) & 0x1f;
- shift = guard + eps - 1;
- mu = 0; // make gcc happy
- } else {
- shift = guard - 1 + tileComp->prec;
- mu = (double)(0x800 + (tileComp->quantSteps[0] & 0x7ff)) / 2048.0;
- }
- if (tileComp->transform == 0) {
- shift += fracBits;
- }
-
- // copy (NL)LL into the upper-left corner of the data array, doing
- // the fixed point adjustment and dequantization along the way
- cb = subband->cbs;
- for (cbY = 0; cbY < subband->nYCBs; ++cbY) {
- for (cbX = 0; cbX < subband->nXCBs; ++cbX) {
- for (y = cb->y0, coeff0 = cb->coeffs;
- y < cb->y1;
- ++y, coeff0 += tileComp->cbW) {
- dataPtr = &tileComp->data[(y - subband->y0)
- * (tileComp->x1 - tileComp->x0)
- + (cb->x0 - subband->x0)];
- for (x = cb->x0, coeff = coeff0; x < cb->x1; ++x, ++coeff) {
- val = (int)coeff->mag;
- if (val != 0) {
- shift2 = shift - (cb->nZeroBitPlanes + coeff->len);
- if (shift2 > 0) {
- val = (val << shift2) + (1 << (shift2 - 1));
- } else {
- val >>= -shift2;
- }
- if (qStyle == 0) {
- if (tileComp->transform == 0) {
- val &= -1 << fracBits;
- }
- } else {
- val = (int)((double)val * mu);
- }
- if (coeff->flags & jpxCoeffSign) {
- val = -val;
- }
- }
- *dataPtr++ = val;
- }
- }
- ++cb;
- }
- }
-
- //----- IDWT for each level
-
- for (r = 1; r <= tileComp->nDecompLevels; ++r) {
- resLevel = &tileComp->resLevels[r];
-
- // (n)LL is already in the upper-left corner of the
- // tile-component data array -- interleave with (n)HL/LH/HH
- // and inverse transform to get (n-1)LL, which will be stored
- // in the upper-left corner of the tile-component data array
- if (r == tileComp->nDecompLevels) {
- nx0 = tileComp->x0;
- ny0 = tileComp->y0;
- nx1 = tileComp->x1;
- ny1 = tileComp->y1;
- } else {
- nx0 = tileComp->resLevels[r+1].x0;
- ny0 = tileComp->resLevels[r+1].y0;
- nx1 = tileComp->resLevels[r+1].x1;
- ny1 = tileComp->resLevels[r+1].y1;
- }
- inverseTransformLevel(tileComp, r, resLevel, nx0, ny0, nx1, ny1);
- }
-}
-
-// Do one level of the inverse transform:
-// - take (n)LL from the tile-component data array
-// - take (n)HL/LH/HH from <resLevel>
-// - leave the resulting (n-1)LL in the tile-component data array
-void JPXStream::inverseTransformLevel(JPXTileComp *tileComp,
- Guint r, JPXResLevel *resLevel,
- Guint nx0, Guint ny0,
- Guint nx1, Guint ny1) {
- JPXPrecinct *precinct;
- JPXSubband *subband;
- JPXCodeBlock *cb;
- JPXCoeff *coeff0, *coeff;
- Guint qStyle, guard, eps, shift, t;
- int shift2;
- double mu;
- int val;
- int *dataPtr;
- Guint xo, yo;
- Guint x, y, sb, cbX, cbY;
- int xx, yy;
-
- //----- interleave
-
- // spread out LL
- for (yy = resLevel->y1 - 1; yy >= (int)resLevel->y0; --yy) {
- for (xx = resLevel->x1 - 1; xx >= (int)resLevel->x0; --xx) {
- tileComp->data[(2 * yy - ny0) * (tileComp->x1 - tileComp->x0)
- + (2 * xx - nx0)] =
- tileComp->data[(yy - resLevel->y0) * (tileComp->x1 - tileComp->x0)
- + (xx - resLevel->x0)];
- }
- }
-
- // i-quant parameters
- qStyle = tileComp->quantStyle & 0x1f;
- guard = (tileComp->quantStyle >> 5) & 7;
-
- // interleave HL/LH/HH
- precinct = &resLevel->precincts[0];
- for (sb = 0; sb < 3; ++sb) {
-
- // i-quant parameters
- if (qStyle == 0) {
- eps = (tileComp->quantSteps[3*r - 2 + sb] >> 3) & 0x1f;
- shift = guard + eps - 1;
- mu = 0; // make gcc happy
- } else {
- shift = guard + tileComp->prec;
- if (sb == 2) {
- ++shift;
- }
- t = tileComp->quantSteps[qStyle == 1 ? 0 : (3*r - 2 + sb)];
- mu = (double)(0x800 + (t & 0x7ff)) / 2048.0;
- }
- if (tileComp->transform == 0) {
- shift += fracBits;
- }
-
- // copy the subband coefficients into the data array, doing the
- // fixed point adjustment and dequantization along the way
- xo = (sb & 1) ? 0 : 1;
- yo = (sb > 0) ? 1 : 0;
- subband = &precinct->subbands[sb];
- cb = subband->cbs;
- for (cbY = 0; cbY < subband->nYCBs; ++cbY) {
- for (cbX = 0; cbX < subband->nXCBs; ++cbX) {
- for (y = cb->y0, coeff0 = cb->coeffs;
- y < cb->y1;
- ++y, coeff0 += tileComp->cbW) {
- dataPtr = &tileComp->data[(2 * y + yo - ny0)
- * (tileComp->x1 - tileComp->x0)
- + (2 * cb->x0 + xo - nx0)];
- for (x = cb->x0, coeff = coeff0; x < cb->x1; ++x, ++coeff) {
- val = (int)coeff->mag;
- if (val != 0) {
- shift2 = shift - (cb->nZeroBitPlanes + coeff->len);
- if (shift2 > 0) {
- val = (val << shift2) + (1 << (shift2 - 1));
- } else {
- val >>= -shift2;
- }
- if (qStyle == 0) {
- if (tileComp->transform == 0) {
- val &= -1 << fracBits;
- }
- } else {
- val = (int)((double)val * mu);
- }
- if (coeff->flags & jpxCoeffSign) {
- val = -val;
- }
- }
- *dataPtr = val;
- dataPtr += 2;
- }
- }
- ++cb;
- }
- }
- }
-
- //----- horizontal (row) transforms
- dataPtr = tileComp->data;
- for (y = 0; y < ny1 - ny0; ++y) {
- inverseTransform1D(tileComp, dataPtr, 1, nx0, nx1);
- dataPtr += tileComp->x1 - tileComp->x0;
- }
-
- //----- vertical (column) transforms
- dataPtr = tileComp->data;
- for (x = 0; x < nx1 - nx0; ++x) {
- inverseTransform1D(tileComp, dataPtr,
- tileComp->x1 - tileComp->x0, ny0, ny1);
- ++dataPtr;
- }
-}
-
-void JPXStream::inverseTransform1D(JPXTileComp *tileComp,
- int *data, Guint stride,
- Guint i0, Guint i1) {
- int *buf;
- Guint offset, end, i;
-
- //----- special case for length = 1
- if (i1 - i0 == 1) {
- if (i0 & 1) {
- *data >>= 1;
- }
-
- } else {
-
- // choose an offset: this makes even buf[] indexes correspond to
- // odd values of i, and vice versa
- offset = 3 + (i0 & 1);
- end = offset + i1 - i0;
-
- //----- gather
- buf = tileComp->buf;
- for (i = 0; i < i1 - i0; ++i) {
- buf[offset + i] = data[i * stride];
- }
-
- //----- extend right
- buf[end] = buf[end - 2];
- if (i1 - i0 == 2) {
- buf[end+1] = buf[offset + 1];
- buf[end+2] = buf[offset];
- buf[end+3] = buf[offset + 1];
- } else {
- buf[end+1] = buf[end - 3];
- if (i1 - i0 == 3) {
- buf[end+2] = buf[offset + 1];
- buf[end+3] = buf[offset + 2];
- } else {
- buf[end+2] = buf[end - 4];
- if (i1 - i0 == 4) {
- buf[end+3] = buf[offset + 1];
- } else {
- buf[end+3] = buf[end - 5];
- }
- }
- }
-
- //----- extend left
- buf[offset - 1] = buf[offset + 1];
- buf[offset - 2] = buf[offset + 2];
- buf[offset - 3] = buf[offset + 3];
- if (offset == 4) {
- buf[0] = buf[offset + 4];
- }
-
- //----- 9-7 irreversible filter
-
- if (tileComp->transform == 0) {
- // step 1 (even)
- for (i = 1; i <= end + 2; i += 2) {
- buf[i] = (int)(idwtKappa * buf[i]);
- }
- // step 2 (odd)
- for (i = 0; i <= end + 3; i += 2) {
- buf[i] = (int)(idwtIKappa * buf[i]);
- }
- // step 3 (even)
- for (i = 1; i <= end + 2; i += 2) {
- buf[i] = (int)(buf[i] - idwtDelta * (buf[i-1] + buf[i+1]));
- }
- // step 4 (odd)
- for (i = 2; i <= end + 1; i += 2) {
- buf[i] = (int)(buf[i] - idwtGamma * (buf[i-1] + buf[i+1]));
- }
- // step 5 (even)
- for (i = 3; i <= end; i += 2) {
- buf[i] = (int)(buf[i] - idwtBeta * (buf[i-1] + buf[i+1]));
- }
- // step 6 (odd)
- for (i = 4; i <= end - 1; i += 2) {
- buf[i] = (int)(buf[i] - idwtAlpha * (buf[i-1] + buf[i+1]));
- }
-
- //----- 5-3 reversible filter
-
- } else {
- // step 1 (even)
- for (i = 3; i <= end; i += 2) {
- buf[i] -= (buf[i-1] + buf[i+1] + 2) >> 2;
- }
- // step 2 (odd)
- for (i = 4; i < end; i += 2) {
- buf[i] += (buf[i-1] + buf[i+1]) >> 1;
- }
- }
-
- //----- scatter
- for (i = 0; i < i1 - i0; ++i) {
- data[i * stride] = buf[offset + i];
- }
- }
-}
-
-// Inverse multi-component transform and DC level shift. This also
-// converts fixed point samples back to integers.
-GBool JPXStream::inverseMultiCompAndDC(JPXTile *tile) {
- JPXTileComp *tileComp;
- int coeff, d0, d1, d2, t, minVal, maxVal, zeroVal;
- int *dataPtr;
- Guint j, comp, x, y;
-
- //----- inverse multi-component transform
-
- if (tile->multiComp == 1) {
- if (img.nComps < 3 ||
- tile->tileComps[0].hSep != tile->tileComps[1].hSep ||
- tile->tileComps[0].vSep != tile->tileComps[1].vSep ||
- tile->tileComps[1].hSep != tile->tileComps[2].hSep ||
- tile->tileComps[1].vSep != tile->tileComps[2].vSep) {
- return gFalse;
- }
-
- // inverse irreversible multiple component transform
- if (tile->tileComps[0].transform == 0) {
- j = 0;
- for (y = 0; y < tile->tileComps[0].y1 - tile->tileComps[0].y0; ++y) {
- for (x = 0; x < tile->tileComps[0].x1 - tile->tileComps[0].x0; ++x) {
- d0 = tile->tileComps[0].data[j];
- d1 = tile->tileComps[1].data[j];
- d2 = tile->tileComps[2].data[j];
- tile->tileComps[0].data[j] = (int)(d0 + 1.402 * d2 + 0.5);
- tile->tileComps[1].data[j] =
- (int)(d0 - 0.34413 * d1 - 0.71414 * d2 + 0.5);
- tile->tileComps[2].data[j] = (int)(d0 + 1.772 * d1 + 0.5);
- ++j;
- }
- }
-
- // inverse reversible multiple component transform
- } else {
- j = 0;
- for (y = 0; y < tile->tileComps[0].y1 - tile->tileComps[0].y0; ++y) {
- for (x = 0; x < tile->tileComps[0].x1 - tile->tileComps[0].x0; ++x) {
- d0 = tile->tileComps[0].data[j];
- d1 = tile->tileComps[1].data[j];
- d2 = tile->tileComps[2].data[j];
- tile->tileComps[1].data[j] = t = d0 - ((d2 + d1) >> 2);
- tile->tileComps[0].data[j] = d2 + t;
- tile->tileComps[2].data[j] = d1 + t;
- ++j;
- }
- }
- }
- }
-
- //----- DC level shift
- for (comp = 0; comp < img.nComps; ++comp) {
- tileComp = &tile->tileComps[comp];
-
- // signed: clip
- if (tileComp->sgned) {
- minVal = -(1 << (tileComp->prec - 1));
- maxVal = (1 << (tileComp->prec - 1)) - 1;
- dataPtr = tileComp->data;
- for (y = 0; y < tileComp->y1 - tileComp->y0; ++y) {
- for (x = 0; x < tileComp->x1 - tileComp->x0; ++x) {
- coeff = *dataPtr;
- if (tileComp->transform == 0) {
- coeff >>= fracBits;
- }
- if (coeff < minVal) {
- coeff = minVal;
- } else if (coeff > maxVal) {
- coeff = maxVal;
- }
- *dataPtr++ = coeff;
- }
- }
-
- // unsigned: inverse DC level shift and clip
- } else {
- maxVal = (1 << tileComp->prec) - 1;
- zeroVal = 1 << (tileComp->prec - 1);
- dataPtr = tileComp->data;
- for (y = 0; y < tileComp->y1 - tileComp->y0; ++y) {
- for (x = 0; x < tileComp->x1 - tileComp->x0; ++x) {
- coeff = *dataPtr;
- if (tileComp->transform == 0) {
- coeff >>= fracBits;
- }
- coeff += zeroVal;
- if (coeff < 0) {
- coeff = 0;
- } else if (coeff > maxVal) {
- coeff = maxVal;
- }
- *dataPtr++ = coeff;
- }
- }
- }
- }
-
- return gTrue;
-}
-
-GBool JPXStream::readBoxHdr(Guint *boxType, Guint *boxLen, Guint *dataLen) {
- Guint len, lenH;
-
- if (!readULong(&len) ||
- !readULong(boxType)) {
- return gFalse;
- }
- if (len == 1) {
- if (!readULong(&lenH) || !readULong(&len)) {
- return gFalse;
- }
- if (lenH) {
- error(getPos(), "JPX stream contains a box larger than 2^32 bytes");
- return gFalse;
- }
- *boxLen = len;
- *dataLen = len - 16;
- } else if (len == 0) {
- *boxLen = 0;
- *dataLen = 0;
- } else {
- *boxLen = len;
- *dataLen = len - 8;
- }
- return gTrue;
-}
-
-int JPXStream::readMarkerHdr(int *segType, Guint *segLen) {
- int c;
-
- do {
- do {
- if ((c = str->getChar()) == EOF) {
- return gFalse;
- }
- } while (c != 0xff);
- do {
- if ((c = str->getChar()) == EOF) {
- return gFalse;
- }
- } while (c == 0xff);
- } while (c == 0x00);
- *segType = c;
- if ((c >= 0x30 && c <= 0x3f) ||
- c == 0x4f || c == 0x92 || c == 0x93 || c == 0xd9) {
- *segLen = 0;
- return gTrue;
- }
- return readUWord(segLen);
-}
-
-GBool JPXStream::readUByte(Guint *x) {
- int c0;
-
- if ((c0 = str->getChar()) == EOF) {
- return gFalse;
- }
- *x = (Guint)c0;
- return gTrue;
-}
-
-GBool JPXStream::readByte(int *x) {
- int c0;
-
- if ((c0 = str->getChar()) == EOF) {
- return gFalse;
- }
- *x = c0;
- if (c0 & 0x80) {
- *x |= -1 - 0xff;
- }
- return gTrue;
-}
-
-GBool JPXStream::readUWord(Guint *x) {
- int c0, c1;
-
- if ((c0 = str->getChar()) == EOF ||
- (c1 = str->getChar()) == EOF) {
- return gFalse;
- }
- *x = (Guint)((c0 << 8) | c1);
- return gTrue;
-}
-
-GBool JPXStream::readULong(Guint *x) {
- int c0, c1, c2, c3;
-
- if ((c0 = str->getChar()) == EOF ||
- (c1 = str->getChar()) == EOF ||
- (c2 = str->getChar()) == EOF ||
- (c3 = str->getChar()) == EOF) {
- return gFalse;
- }
- *x = (Guint)((c0 << 24) | (c1 << 16) | (c2 << 8) | c3);
- return gTrue;
-}
-
-GBool JPXStream::readNBytes(int nBytes, GBool signd, int *x) {
- int y, c, i;
-
- y = 0;
- for (i = 0; i < nBytes; ++i) {
- if ((c = str->getChar()) == EOF) {
- return gFalse;
- }
- y = (y << 8) + c;
- }
- if (signd) {
- if (y & (1 << (8 * nBytes - 1))) {
- y |= -1 << (8 * nBytes);
- }
- }
- *x = y;
- return gTrue;
-}
-
-GBool JPXStream::readBits(int nBits, Guint *x) {
- int c;
-
- while (bitBufLen < nBits) {
- if ((c = str->getChar()) == EOF) {
- return gFalse;
- }
- ++byteCount;
- if (bitBufSkip) {
- bitBuf = (bitBuf << 7) | (c & 0x7f);
- bitBufLen += 7;
- } else {
- bitBuf = (bitBuf << 8) | (c & 0xff);
- bitBufLen += 8;
- }
- bitBufSkip = c == 0xff;
- }
- *x = (bitBuf >> (bitBufLen - nBits)) & ((1 << nBits) - 1);
- bitBufLen -= nBits;
- return gTrue;
-}
-
-void JPXStream::clearBitBuf() {
- bitBufLen = 0;
- bitBufSkip = gFalse;
- byteCount = 0;
-}
git.asbjorn.biz / swftools.git / blobdiff