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ef416fc2 | 1 | //======================================================================== |
2 | // | |
3 | // JPXStream.cc | |
4 | // | |
5 | // Copyright 2002-2003 Glyph & Cog, LLC | |
6 | // | |
7 | //======================================================================== | |
8 | ||
9 | #include <config.h> | |
10 | ||
11 | #ifdef USE_GCC_PRAGMAS | |
12 | #pragma implementation | |
13 | #endif | |
14 | ||
15 | #include "gmem.h" | |
16 | #include "Error.h" | |
17 | #include "JArithmeticDecoder.h" | |
18 | #include "JPXStream.h" | |
19 | ||
20 | //~ to do: | |
21 | // - precincts | |
22 | // - ROI | |
23 | // - progression order changes | |
24 | // - packed packet headers | |
25 | // - support for palettes, channel maps, etc. | |
26 | // - make sure all needed JP2/JPX subboxes are parsed (readBoxes) | |
27 | // - can we assume that QCC segments must come after the QCD segment? | |
28 | // - skip EPH markers (readTilePartData) | |
29 | // - handle tilePartToEOC in readTilePartData | |
30 | // - deal with multiple codeword segments (readTilePartData, | |
31 | // readCodeBlockData) | |
32 | // - progression orders 2, 3, and 4 | |
33 | // - in coefficient decoding (readCodeBlockData): | |
34 | // - termination pattern: terminate after every coding pass | |
35 | // - error resilience segmentation symbol | |
36 | // - selective arithmetic coding bypass | |
37 | // - vertically causal context formation | |
38 | // - coeffs longer than 31 bits (should just ignore the extra bits?) | |
39 | // - handle boxes larger than 2^32 bytes | |
40 | // - the fixed-point arithmetic won't handle 16-bit pixels | |
41 | ||
42 | //------------------------------------------------------------------------ | |
43 | ||
44 | // number of contexts for the arithmetic decoder | |
45 | #define jpxNContexts 19 | |
46 | ||
47 | #define jpxContextSigProp 0 // 0 - 8: significance prop and cleanup | |
48 | #define jpxContextSign 9 // 9 - 13: sign | |
49 | #define jpxContextMagRef 14 // 14 -16: magnitude refinement | |
50 | #define jpxContextRunLength 17 // cleanup: run length | |
51 | #define jpxContextUniform 18 // cleanup: first signif coeff | |
52 | ||
53 | //------------------------------------------------------------------------ | |
54 | ||
55 | #define jpxPassSigProp 0 | |
56 | #define jpxPassMagRef 1 | |
57 | #define jpxPassCleanup 2 | |
58 | ||
59 | //------------------------------------------------------------------------ | |
60 | ||
61 | // arithmetic decoder context for the significance propagation and | |
62 | // cleanup passes: | |
63 | // [horiz][vert][diag][subband] | |
64 | // where subband = 0 for HL | |
65 | // = 1 for LH and LL | |
66 | // = 2 for HH | |
67 | static Guint sigPropContext[3][3][5][3] = { | |
68 | {{{ 0, 0, 0 }, // horiz=0, vert=0, diag=0 | |
69 | { 1, 1, 3 }, // horiz=0, vert=0, diag=1 | |
70 | { 2, 2, 6 }, // horiz=0, vert=0, diag=2 | |
71 | { 2, 2, 8 }, // horiz=0, vert=0, diag=3 | |
72 | { 2, 2, 8 }}, // horiz=0, vert=0, diag=4 | |
73 | {{ 5, 3, 1 }, // horiz=0, vert=1, diag=0 | |
74 | { 6, 3, 4 }, // horiz=0, vert=1, diag=1 | |
75 | { 6, 3, 7 }, // horiz=0, vert=1, diag=2 | |
76 | { 6, 3, 8 }, // horiz=0, vert=1, diag=3 | |
77 | { 6, 3, 8 }}, // horiz=0, vert=1, diag=4 | |
78 | {{ 8, 4, 2 }, // horiz=0, vert=2, diag=0 | |
79 | { 8, 4, 5 }, // horiz=0, vert=2, diag=1 | |
80 | { 8, 4, 7 }, // horiz=0, vert=2, diag=2 | |
81 | { 8, 4, 8 }, // horiz=0, vert=2, diag=3 | |
82 | { 8, 4, 8 }}}, // horiz=0, vert=2, diag=4 | |
83 | {{{ 3, 5, 1 }, // horiz=1, vert=0, diag=0 | |
84 | { 3, 6, 4 }, // horiz=1, vert=0, diag=1 | |
85 | { 3, 6, 7 }, // horiz=1, vert=0, diag=2 | |
86 | { 3, 6, 8 }, // horiz=1, vert=0, diag=3 | |
87 | { 3, 6, 8 }}, // horiz=1, vert=0, diag=4 | |
88 | {{ 7, 7, 2 }, // horiz=1, vert=1, diag=0 | |
89 | { 7, 7, 5 }, // horiz=1, vert=1, diag=1 | |
90 | { 7, 7, 7 }, // horiz=1, vert=1, diag=2 | |
91 | { 7, 7, 8 }, // horiz=1, vert=1, diag=3 | |
92 | { 7, 7, 8 }}, // horiz=1, vert=1, diag=4 | |
93 | {{ 8, 7, 2 }, // horiz=1, vert=2, diag=0 | |
94 | { 8, 7, 5 }, // horiz=1, vert=2, diag=1 | |
95 | { 8, 7, 7 }, // horiz=1, vert=2, diag=2 | |
96 | { 8, 7, 8 }, // horiz=1, vert=2, diag=3 | |
97 | { 8, 7, 8 }}}, // horiz=1, vert=2, diag=4 | |
98 | {{{ 4, 8, 2 }, // horiz=2, vert=0, diag=0 | |
99 | { 4, 8, 5 }, // horiz=2, vert=0, diag=1 | |
100 | { 4, 8, 7 }, // horiz=2, vert=0, diag=2 | |
101 | { 4, 8, 8 }, // horiz=2, vert=0, diag=3 | |
102 | { 4, 8, 8 }}, // horiz=2, vert=0, diag=4 | |
103 | {{ 7, 8, 2 }, // horiz=2, vert=1, diag=0 | |
104 | { 7, 8, 5 }, // horiz=2, vert=1, diag=1 | |
105 | { 7, 8, 7 }, // horiz=2, vert=1, diag=2 | |
106 | { 7, 8, 8 }, // horiz=2, vert=1, diag=3 | |
107 | { 7, 8, 8 }}, // horiz=2, vert=1, diag=4 | |
108 | {{ 8, 8, 2 }, // horiz=2, vert=2, diag=0 | |
109 | { 8, 8, 5 }, // horiz=2, vert=2, diag=1 | |
110 | { 8, 8, 7 }, // horiz=2, vert=2, diag=2 | |
111 | { 8, 8, 8 }, // horiz=2, vert=2, diag=3 | |
112 | { 8, 8, 8 }}} // horiz=2, vert=2, diag=4 | |
113 | }; | |
114 | ||
115 | // arithmetic decoder context and xor bit for the sign bit in the | |
116 | // significance propagation pass: | |
117 | // [horiz][vert][k] | |
118 | // where horiz/vert are offset by 2 (i.e., range is -2 .. 2) | |
119 | // and k = 0 for the context | |
120 | // = 1 for the xor bit | |
121 | static Guint signContext[5][5][2] = { | |
122 | {{ 13, 1 }, // horiz=-2, vert=-2 | |
123 | { 13, 1 }, // horiz=-2, vert=-1 | |
124 | { 12, 1 }, // horiz=-2, vert= 0 | |
125 | { 11, 1 }, // horiz=-2, vert=+1 | |
126 | { 11, 1 }}, // horiz=-2, vert=+2 | |
127 | {{ 13, 1 }, // horiz=-1, vert=-2 | |
128 | { 13, 1 }, // horiz=-1, vert=-1 | |
129 | { 12, 1 }, // horiz=-1, vert= 0 | |
130 | { 11, 1 }, // horiz=-1, vert=+1 | |
131 | { 11, 1 }}, // horiz=-1, vert=+2 | |
132 | {{ 10, 1 }, // horiz= 0, vert=-2 | |
133 | { 10, 1 }, // horiz= 0, vert=-1 | |
134 | { 9, 0 }, // horiz= 0, vert= 0 | |
135 | { 10, 0 }, // horiz= 0, vert=+1 | |
136 | { 10, 0 }}, // horiz= 0, vert=+2 | |
137 | {{ 11, 0 }, // horiz=+1, vert=-2 | |
138 | { 11, 0 }, // horiz=+1, vert=-1 | |
139 | { 12, 0 }, // horiz=+1, vert= 0 | |
140 | { 13, 0 }, // horiz=+1, vert=+1 | |
141 | { 13, 0 }}, // horiz=+1, vert=+2 | |
142 | {{ 11, 0 }, // horiz=+2, vert=-2 | |
143 | { 11, 0 }, // horiz=+2, vert=-1 | |
144 | { 12, 0 }, // horiz=+2, vert= 0 | |
145 | { 13, 0 }, // horiz=+2, vert=+1 | |
146 | { 13, 0 }}, // horiz=+2, vert=+2 | |
147 | }; | |
148 | ||
149 | //------------------------------------------------------------------------ | |
150 | ||
151 | // constants used in the IDWT | |
152 | #define idwtAlpha -1.586134342059924 | |
153 | #define idwtBeta -0.052980118572961 | |
154 | #define idwtGamma 0.882911075530934 | |
155 | #define idwtDelta 0.443506852043971 | |
156 | #define idwtKappa 1.230174104914001 | |
157 | #define idwtIKappa (1.0 / idwtKappa) | |
158 | ||
159 | // number of bits to the right of the decimal point for the fixed | |
160 | // point arithmetic used in the IDWT | |
161 | #define fracBits 16 | |
162 | ||
163 | //------------------------------------------------------------------------ | |
164 | ||
165 | // floor(x / y) | |
166 | #define jpxFloorDiv(x, y) ((x) / (y)) | |
167 | ||
168 | // floor(x / 2^y) | |
169 | #define jpxFloorDivPow2(x, y) ((x) >> (y)) | |
170 | ||
171 | // ceil(x / y) | |
172 | #define jpxCeilDiv(x, y) (((x) + (y) - 1) / (y)) | |
173 | ||
174 | // ceil(x / 2^y) | |
175 | #define jpxCeilDivPow2(x, y) (((x) + (1 << (y)) - 1) >> (y)) | |
176 | ||
177 | //------------------------------------------------------------------------ | |
178 | ||
179 | JPXStream::JPXStream(Stream *strA): | |
180 | FilterStream(strA) | |
181 | { | |
182 | nComps = 0; | |
183 | bpc = NULL; | |
184 | width = height = 0; | |
185 | haveCS = gFalse; | |
186 | havePalette = gFalse; | |
187 | haveCompMap = gFalse; | |
188 | haveChannelDefn = gFalse; | |
189 | ||
190 | img.tiles = NULL; | |
191 | bitBuf = 0; | |
192 | bitBufLen = 0; | |
193 | bitBufSkip = gFalse; | |
194 | byteCount = 0; | |
195 | } | |
196 | ||
197 | JPXStream::~JPXStream() { | |
198 | JPXTile *tile; | |
199 | JPXTileComp *tileComp; | |
200 | JPXResLevel *resLevel; | |
201 | JPXPrecinct *precinct; | |
202 | JPXSubband *subband; | |
203 | JPXCodeBlock *cb; | |
204 | Guint comp, i, k, r, pre, sb; | |
205 | ||
206 | gfree(bpc); | |
207 | if (havePalette) { | |
208 | gfree(palette.bpc); | |
209 | gfree(palette.c); | |
210 | } | |
211 | if (haveCompMap) { | |
212 | gfree(compMap.comp); | |
213 | gfree(compMap.type); | |
214 | gfree(compMap.pComp); | |
215 | } | |
216 | if (haveChannelDefn) { | |
217 | gfree(channelDefn.idx); | |
218 | gfree(channelDefn.type); | |
219 | gfree(channelDefn.assoc); | |
220 | } | |
221 | ||
222 | if (img.tiles) { | |
223 | for (i = 0; i < img.nXTiles * img.nYTiles; ++i) { | |
224 | tile = &img.tiles[i]; | |
225 | if (tile->tileComps) { | |
226 | for (comp = 0; comp < img.nComps; ++comp) { | |
227 | tileComp = &tile->tileComps[comp]; | |
228 | gfree(tileComp->quantSteps); | |
229 | gfree(tileComp->data); | |
230 | gfree(tileComp->buf); | |
231 | if (tileComp->resLevels) { | |
232 | for (r = 0; r <= tileComp->nDecompLevels; ++r) { | |
233 | resLevel = &tileComp->resLevels[r]; | |
234 | if (resLevel->precincts) { | |
235 | for (pre = 0; pre < 1; ++pre) { | |
236 | precinct = &resLevel->precincts[pre]; | |
237 | if (precinct->subbands) { | |
238 | for (sb = 0; sb < (r == 0 ? 1 : 3); ++sb) { | |
239 | subband = &precinct->subbands[sb]; | |
240 | gfree(subband->inclusion); | |
241 | gfree(subband->zeroBitPlane); | |
242 | if (subband->cbs) { | |
243 | for (k = 0; k < subband->nXCBs * subband->nYCBs; ++k) { | |
244 | cb = &subband->cbs[k]; | |
245 | gfree(cb->coeffs); | |
246 | if (cb->arithDecoder) { | |
247 | delete cb->arithDecoder; | |
248 | } | |
249 | if (cb->stats) { | |
250 | delete cb->stats; | |
251 | } | |
252 | } | |
253 | gfree(subband->cbs); | |
254 | } | |
255 | } | |
256 | gfree(precinct->subbands); | |
257 | } | |
258 | } | |
259 | gfree(img.tiles[i].tileComps[comp].resLevels[r].precincts); | |
260 | } | |
261 | } | |
262 | gfree(img.tiles[i].tileComps[comp].resLevels); | |
263 | } | |
264 | } | |
265 | gfree(img.tiles[i].tileComps); | |
266 | } | |
267 | } | |
268 | gfree(img.tiles); | |
269 | } | |
270 | delete str; | |
271 | } | |
272 | ||
273 | void JPXStream::reset() { | |
274 | str->reset(); | |
275 | if (readBoxes()) { | |
276 | curY = img.yOffset; | |
277 | } else { | |
278 | // readBoxes reported an error, so we go immediately to EOF | |
279 | curY = img.ySize; | |
280 | } | |
281 | curX = img.xOffset; | |
282 | curComp = 0; | |
283 | readBufLen = 0; | |
284 | } | |
285 | ||
286 | int JPXStream::getChar() { | |
287 | int c; | |
288 | ||
289 | if (readBufLen < 8) { | |
290 | fillReadBuf(); | |
291 | } | |
292 | if (readBufLen == 8) { | |
293 | c = readBuf & 0xff; | |
294 | readBufLen = 0; | |
295 | } else if (readBufLen > 8) { | |
296 | c = (readBuf >> (readBufLen - 8)) & 0xff; | |
297 | readBufLen -= 8; | |
298 | } else if (readBufLen == 0) { | |
299 | c = EOF; | |
300 | } else { | |
301 | c = (readBuf << (8 - readBufLen)) & 0xff; | |
302 | readBufLen = 0; | |
303 | } | |
304 | return c; | |
305 | } | |
306 | ||
307 | int JPXStream::lookChar() { | |
308 | int c; | |
309 | ||
310 | if (readBufLen < 8) { | |
311 | fillReadBuf(); | |
312 | } | |
313 | if (readBufLen == 8) { | |
314 | c = readBuf & 0xff; | |
315 | } else if (readBufLen > 8) { | |
316 | c = (readBuf >> (readBufLen - 8)) & 0xff; | |
317 | } else if (readBufLen == 0) { | |
318 | c = EOF; | |
319 | } else { | |
320 | c = (readBuf << (8 - readBufLen)) & 0xff; | |
321 | } | |
322 | return c; | |
323 | } | |
324 | ||
325 | void JPXStream::fillReadBuf() { | |
326 | JPXTileComp *tileComp; | |
327 | Guint tileIdx, tx, ty; | |
328 | int pix, pixBits; | |
329 | ||
330 | do { | |
331 | if (curY >= img.ySize) { | |
332 | return; | |
333 | } | |
334 | tileIdx = ((curY - img.yTileOffset) / img.yTileSize) * img.nXTiles | |
335 | + (curX - img.xTileOffset) / img.xTileSize; | |
336 | #if 1 //~ ignore the palette, assume the PDF ColorSpace object is valid | |
337 | tileComp = &img.tiles[tileIdx].tileComps[curComp]; | |
338 | #else | |
339 | tileComp = &img.tiles[tileIdx].tileComps[havePalette ? 0 : curComp]; | |
340 | #endif | |
341 | tx = jpxCeilDiv((curX - img.xTileOffset) % img.xTileSize, tileComp->hSep); | |
342 | ty = jpxCeilDiv((curY - img.yTileOffset) % img.yTileSize, tileComp->vSep); | |
343 | pix = (int)tileComp->data[ty * (tileComp->x1 - tileComp->x0) + tx]; | |
344 | pixBits = tileComp->prec; | |
345 | #if 1 //~ ignore the palette, assume the PDF ColorSpace object is valid | |
346 | if (++curComp == img.nComps) { | |
347 | #else | |
348 | if (havePalette) { | |
349 | if (pix >= 0 && pix < palette.nEntries) { | |
350 | pix = palette.c[pix * palette.nComps + curComp]; | |
351 | } else { | |
352 | pix = | |
353 | pixBits = palette.bpc[curComp]; | |
354 | } | |
355 | if (++curComp == (Guint)(havePalette ? palette.nComps : img.nComps)) { | |
356 | #endif | |
357 | curComp = 0; | |
358 | if (++curX == img.xSize) { | |
359 | curX = img.xOffset; | |
360 | ++curY; | |
361 | } | |
362 | } | |
363 | if (pixBits == 8) { | |
364 | readBuf = (readBuf << 8) | (pix & 0xff); | |
365 | } else { | |
366 | readBuf = (readBuf << pixBits) | (pix & ((1 << pixBits) - 1)); | |
367 | } | |
368 | readBufLen += pixBits; | |
369 | } while (readBufLen < 8); | |
370 | } | |
371 | ||
372 | GString *JPXStream::getPSFilter(int psLevel, char *indent) { | |
373 | return NULL; | |
374 | } | |
375 | ||
376 | GBool JPXStream::isBinary(GBool last) { | |
377 | return str->isBinary(gTrue); | |
378 | } | |
379 | ||
380 | void JPXStream::getImageParams(int *bitsPerComponent, | |
381 | StreamColorSpaceMode *csMode) { | |
382 | Guint boxType, boxLen, dataLen, csEnum; | |
383 | Guint bpc1, dummy, i; | |
384 | int csMeth, csPrec, csPrec1, dummy2; | |
385 | StreamColorSpaceMode csMode1; | |
386 | GBool haveBPC, haveCSMode; | |
387 | ||
388 | csPrec = 0; // make gcc happy | |
389 | haveBPC = haveCSMode = gFalse; | |
390 | str->reset(); | |
391 | if (str->lookChar() == 0xff) { | |
392 | getImageParams2(bitsPerComponent, csMode); | |
393 | } else { | |
394 | while (readBoxHdr(&boxType, &boxLen, &dataLen)) { | |
395 | if (boxType == 0x6a703268) { // JP2 header | |
396 | // skip the superbox | |
397 | } else if (boxType == 0x69686472) { // image header | |
398 | if (readULong(&dummy) && | |
399 | readULong(&dummy) && | |
400 | readUWord(&dummy) && | |
401 | readUByte(&bpc1) && | |
402 | readUByte(&dummy) && | |
403 | readUByte(&dummy) && | |
404 | readUByte(&dummy)) { | |
405 | *bitsPerComponent = bpc1 + 1; | |
406 | haveBPC = gTrue; | |
407 | } | |
408 | } else if (boxType == 0x636F6C72) { // color specification | |
409 | if (readByte(&csMeth) && | |
410 | readByte(&csPrec1) && | |
411 | readByte(&dummy2)) { | |
412 | if (csMeth == 1) { | |
413 | if (readULong(&csEnum)) { | |
414 | csMode1 = streamCSNone; | |
415 | if (csEnum == jpxCSBiLevel || | |
416 | csEnum == jpxCSGrayscale) { | |
417 | csMode1 = streamCSDeviceGray; | |
418 | } else if (csEnum == jpxCSCMYK) { | |
419 | csMode1 = streamCSDeviceCMYK; | |
420 | } else if (csEnum == jpxCSsRGB || | |
421 | csEnum == jpxCSCISesRGB || | |
422 | csEnum == jpxCSROMMRGB) { | |
423 | csMode1 = streamCSDeviceRGB; | |
424 | } | |
425 | if (csMode1 != streamCSNone && | |
426 | (!haveCSMode || csPrec1 > csPrec)) { | |
427 | *csMode = csMode1; | |
428 | csPrec = csPrec1; | |
429 | haveCSMode = gTrue; | |
430 | } | |
431 | for (i = 0; i < dataLen - 7; ++i) { | |
432 | str->getChar(); | |
433 | } | |
434 | } | |
435 | } else { | |
436 | for (i = 0; i < dataLen - 3; ++i) { | |
437 | str->getChar(); | |
438 | } | |
439 | } | |
440 | } | |
441 | } else if (boxType == 0x6A703263) { // codestream | |
442 | if (!(haveBPC && haveCSMode)) { | |
443 | getImageParams2(bitsPerComponent, csMode); | |
444 | } | |
445 | break; | |
446 | } else { | |
447 | for (i = 0; i < dataLen; ++i) { | |
448 | str->getChar(); | |
449 | } | |
450 | } | |
451 | } | |
452 | } | |
453 | str->close(); | |
454 | } | |
455 | ||
456 | // Get image parameters from the codestream. | |
457 | void JPXStream::getImageParams2(int *bitsPerComponent, | |
458 | StreamColorSpaceMode *csMode) { | |
459 | int segType; | |
460 | Guint segLen, nComps1, bpc1, dummy, i; | |
461 | ||
462 | while (readMarkerHdr(&segType, &segLen)) { | |
463 | if (segType == 0x51) { // SIZ - image and tile size | |
464 | if (readUWord(&dummy) && | |
465 | readULong(&dummy) && | |
466 | readULong(&dummy) && | |
467 | readULong(&dummy) && | |
468 | readULong(&dummy) && | |
469 | readULong(&dummy) && | |
470 | readULong(&dummy) && | |
471 | readULong(&dummy) && | |
472 | readULong(&dummy) && | |
473 | readUWord(&nComps1) && | |
474 | readUByte(&bpc1)) { | |
475 | *bitsPerComponent = (bpc1 & 0x7f) + 1; | |
476 | // if there's no color space info, take a guess | |
477 | if (nComps1 == 1) { | |
478 | *csMode = streamCSDeviceGray; | |
479 | } else if (nComps1 == 3) { | |
480 | *csMode = streamCSDeviceRGB; | |
481 | } else if (nComps1 == 4) { | |
482 | *csMode = streamCSDeviceCMYK; | |
483 | } | |
484 | } | |
485 | break; | |
486 | } else { | |
487 | if (segLen > 2) { | |
488 | for (i = 0; i < segLen - 2; ++i) { | |
489 | str->getChar(); | |
490 | } | |
491 | } | |
492 | } | |
493 | } | |
494 | } | |
495 | ||
496 | GBool JPXStream::readBoxes() { | |
497 | Guint boxType, boxLen, dataLen; | |
498 | Guint bpc1, compression, unknownColorspace, ipr; | |
499 | Guint i, j; | |
500 | ||
501 | haveImgHdr = gFalse; | |
502 | ||
503 | // check for a naked JPEG 2000 codestream (without the JP2/JPX | |
504 | // wrapper) -- this appears to be a violation of the PDF spec, but | |
505 | // Acrobat allows it | |
506 | if (str->lookChar() == 0xff) { | |
507 | error(getPos(), "Naked JPEG 2000 codestream, missing JP2/JPX wrapper"); | |
508 | readCodestream(0); | |
509 | nComps = img.nComps; | |
510 | bpc = (Guint *)gmallocn(nComps, sizeof(Guint)); | |
511 | for (i = 0; i < nComps; ++i) { | |
512 | bpc[i] = img.tiles[0].tileComps[i].prec; | |
513 | } | |
514 | width = img.xSize - img.xOffset; | |
515 | height = img.ySize - img.yOffset; | |
516 | return gTrue; | |
517 | } | |
518 | ||
519 | while (readBoxHdr(&boxType, &boxLen, &dataLen)) { | |
520 | switch (boxType) { | |
521 | case 0x6a703268: // JP2 header | |
522 | // this is a grouping box ('superbox') which has no real | |
523 | // contents and doesn't appear to be used consistently, i.e., | |
524 | // some things which should be subboxes of the JP2 header box | |
525 | // show up outside of it - so we simply ignore the JP2 header | |
526 | // box | |
527 | break; | |
528 | case 0x69686472: // image header | |
529 | if (!readULong(&height) || | |
530 | !readULong(&width) || | |
531 | !readUWord(&nComps) || | |
532 | !readUByte(&bpc1) || | |
533 | !readUByte(&compression) || | |
534 | !readUByte(&unknownColorspace) || | |
535 | !readUByte(&ipr)) { | |
536 | error(getPos(), "Unexpected EOF in JPX stream"); | |
537 | return gFalse; | |
538 | } | |
539 | if (compression != 7) { | |
540 | error(getPos(), "Unknown compression type in JPX stream"); | |
541 | return gFalse; | |
542 | } | |
543 | bpc = (Guint *)gmallocn(nComps, sizeof(Guint)); | |
544 | for (i = 0; i < nComps; ++i) { | |
545 | bpc[i] = bpc1; | |
546 | } | |
547 | haveImgHdr = gTrue; | |
548 | break; | |
549 | case 0x62706363: // bits per component | |
550 | if (!haveImgHdr) { | |
551 | error(getPos(), "Found bits per component box before image header box in JPX stream"); | |
552 | return gFalse; | |
553 | } | |
554 | if (dataLen != nComps) { | |
555 | error(getPos(), "Invalid bits per component box in JPX stream"); | |
556 | return gFalse; | |
557 | } | |
558 | for (i = 0; i < nComps; ++i) { | |
559 | if (!readUByte(&bpc[i])) { | |
560 | error(getPos(), "Unexpected EOF in JPX stream"); | |
561 | return gFalse; | |
562 | } | |
563 | } | |
564 | break; | |
565 | case 0x636F6C72: // color specification | |
566 | if (!readColorSpecBox(dataLen)) { | |
567 | return gFalse; | |
568 | } | |
569 | break; | |
570 | case 0x70636c72: // palette | |
571 | if (!readUWord(&palette.nEntries) || | |
572 | !readUByte(&palette.nComps)) { | |
573 | error(getPos(), "Unexpected EOF in JPX stream"); | |
574 | return gFalse; | |
575 | } | |
576 | palette.bpc = (Guint *)gmallocn(palette.nComps, sizeof(Guint)); | |
577 | palette.c = | |
578 | (int *)gmallocn(palette.nEntries * palette.nComps, sizeof(int)); | |
579 | for (i = 0; i < palette.nComps; ++i) { | |
580 | if (!readUByte(&palette.bpc[i])) { | |
581 | error(getPos(), "Unexpected EOF in JPX stream"); | |
582 | return gFalse; | |
583 | } | |
584 | ++palette.bpc[i]; | |
585 | } | |
586 | for (i = 0; i < palette.nEntries; ++i) { | |
587 | for (j = 0; j < palette.nComps; ++j) { | |
588 | if (!readNBytes(((palette.bpc[j] & 0x7f) + 7) >> 3, | |
589 | (palette.bpc[j] & 0x80) ? gTrue : gFalse, | |
590 | &palette.c[i * palette.nComps + j])) { | |
591 | error(getPos(), "Unexpected EOF in JPX stream"); | |
592 | return gFalse; | |
593 | } | |
594 | } | |
595 | } | |
596 | havePalette = gTrue; | |
597 | break; | |
598 | case 0x636d6170: // component mapping | |
599 | compMap.nChannels = dataLen / 4; | |
600 | compMap.comp = (Guint *)gmallocn(compMap.nChannels, sizeof(Guint)); | |
601 | compMap.type = (Guint *)gmallocn(compMap.nChannels, sizeof(Guint)); | |
602 | compMap.pComp = (Guint *)gmallocn(compMap.nChannels, sizeof(Guint)); | |
603 | for (i = 0; i < compMap.nChannels; ++i) { | |
604 | if (!readUWord(&compMap.comp[i]) || | |
605 | !readUByte(&compMap.type[i]) || | |
606 | !readUByte(&compMap.pComp[i])) { | |
607 | error(getPos(), "Unexpected EOF in JPX stream"); | |
608 | return gFalse; | |
609 | } | |
610 | } | |
611 | haveCompMap = gTrue; | |
612 | break; | |
613 | case 0x63646566: // channel definition | |
614 | if (!readUWord(&channelDefn.nChannels)) { | |
615 | error(getPos(), "Unexpected EOF in JPX stream"); | |
616 | return gFalse; | |
617 | } | |
618 | channelDefn.idx = | |
619 | (Guint *)gmallocn(channelDefn.nChannels, sizeof(Guint)); | |
620 | channelDefn.type = | |
621 | (Guint *)gmallocn(channelDefn.nChannels, sizeof(Guint)); | |
622 | channelDefn.assoc = | |
623 | (Guint *)gmallocn(channelDefn.nChannels, sizeof(Guint)); | |
624 | for (i = 0; i < channelDefn.nChannels; ++i) { | |
625 | if (!readUWord(&channelDefn.idx[i]) || | |
626 | !readUWord(&channelDefn.type[i]) || | |
627 | !readUWord(&channelDefn.assoc[i])) { | |
628 | error(getPos(), "Unexpected EOF in JPX stream"); | |
629 | return gFalse; | |
630 | } | |
631 | } | |
632 | haveChannelDefn = gTrue; | |
633 | break; | |
634 | case 0x6A703263: // contiguous codestream | |
635 | if (!bpc) { | |
636 | error(getPos(), "JPX stream is missing the image header box"); | |
637 | } | |
638 | if (!haveCS) { | |
639 | error(getPos(), "JPX stream has no supported color spec"); | |
640 | } | |
641 | if (!readCodestream(dataLen)) { | |
642 | return gFalse; | |
643 | } | |
644 | break; | |
645 | default: | |
646 | for (i = 0; i < dataLen; ++i) { | |
647 | if (str->getChar() == EOF) { | |
648 | error(getPos(), "Unexpected EOF in JPX stream"); | |
649 | return gFalse; | |
650 | } | |
651 | } | |
652 | break; | |
653 | } | |
654 | } | |
655 | return gTrue; | |
656 | } | |
657 | ||
658 | GBool JPXStream::readColorSpecBox(Guint dataLen) { | |
659 | JPXColorSpec newCS; | |
660 | Guint csApprox, csEnum; | |
661 | Guint i; | |
662 | GBool ok; | |
663 | ||
664 | ok = gFalse; | |
665 | if (!readUByte(&newCS.meth) || | |
666 | !readByte(&newCS.prec) || | |
667 | !readUByte(&csApprox)) { | |
668 | goto err; | |
669 | } | |
670 | switch (newCS.meth) { | |
671 | case 1: // enumerated colorspace | |
672 | if (!readULong(&csEnum)) { | |
673 | goto err; | |
674 | } | |
675 | newCS.enumerated.type = (JPXColorSpaceType)csEnum; | |
676 | switch (newCS.enumerated.type) { | |
677 | case jpxCSBiLevel: | |
678 | ok = gTrue; | |
679 | break; | |
680 | case jpxCSYCbCr1: | |
681 | ok = gTrue; | |
682 | break; | |
683 | case jpxCSYCbCr2: | |
684 | ok = gTrue; | |
685 | break; | |
686 | case jpxCSYCBCr3: | |
687 | ok = gTrue; | |
688 | break; | |
689 | case jpxCSPhotoYCC: | |
690 | ok = gTrue; | |
691 | break; | |
692 | case jpxCSCMY: | |
693 | ok = gTrue; | |
694 | break; | |
695 | case jpxCSCMYK: | |
696 | ok = gTrue; | |
697 | break; | |
698 | case jpxCSYCCK: | |
699 | ok = gTrue; | |
700 | break; | |
701 | case jpxCSCIELab: | |
702 | if (dataLen == 7 + 7*4) { | |
703 | if (!readULong(&newCS.enumerated.cieLab.rl) || | |
704 | !readULong(&newCS.enumerated.cieLab.ol) || | |
705 | !readULong(&newCS.enumerated.cieLab.ra) || | |
706 | !readULong(&newCS.enumerated.cieLab.oa) || | |
707 | !readULong(&newCS.enumerated.cieLab.rb) || | |
708 | !readULong(&newCS.enumerated.cieLab.ob) || | |
709 | !readULong(&newCS.enumerated.cieLab.il)) { | |
710 | goto err; | |
711 | } | |
712 | } else if (dataLen == 7) { | |
713 | //~ this assumes the 8-bit case | |
714 | newCS.enumerated.cieLab.rl = 100; | |
715 | newCS.enumerated.cieLab.ol = 0; | |
716 | newCS.enumerated.cieLab.ra = 255; | |
717 | newCS.enumerated.cieLab.oa = 128; | |
718 | newCS.enumerated.cieLab.rb = 255; | |
719 | newCS.enumerated.cieLab.ob = 96; | |
720 | newCS.enumerated.cieLab.il = 0x00443530; | |
721 | } else { | |
722 | goto err; | |
723 | } | |
724 | ok = gTrue; | |
725 | break; | |
726 | case jpxCSsRGB: | |
727 | ok = gTrue; | |
728 | break; | |
729 | case jpxCSGrayscale: | |
730 | ok = gTrue; | |
731 | break; | |
732 | case jpxCSBiLevel2: | |
733 | ok = gTrue; | |
734 | break; | |
735 | case jpxCSCIEJab: | |
736 | // not allowed in PDF | |
737 | goto err; | |
738 | case jpxCSCISesRGB: | |
739 | ok = gTrue; | |
740 | break; | |
741 | case jpxCSROMMRGB: | |
742 | ok = gTrue; | |
743 | break; | |
744 | case jpxCSsRGBYCbCr: | |
745 | ok = gTrue; | |
746 | break; | |
747 | case jpxCSYPbPr1125: | |
748 | ok = gTrue; | |
749 | break; | |
750 | case jpxCSYPbPr1250: | |
751 | ok = gTrue; | |
752 | break; | |
753 | default: | |
754 | goto err; | |
755 | } | |
756 | break; | |
757 | case 2: // restricted ICC profile | |
758 | case 3: // any ICC profile (JPX) | |
759 | case 4: // vendor color (JPX) | |
760 | for (i = 0; i < dataLen - 3; ++i) { | |
761 | if (str->getChar() == EOF) { | |
762 | goto err; | |
763 | } | |
764 | } | |
765 | break; | |
766 | } | |
767 | ||
768 | if (ok && (!haveCS || newCS.prec > cs.prec)) { | |
769 | cs = newCS; | |
770 | haveCS = gTrue; | |
771 | } | |
772 | ||
773 | return gTrue; | |
774 | ||
775 | err: | |
776 | error(getPos(), "Error in JPX color spec"); | |
777 | return gFalse; | |
778 | } | |
779 | ||
780 | GBool JPXStream::readCodestream(Guint len) { | |
781 | JPXTile *tile; | |
782 | JPXTileComp *tileComp; | |
783 | int segType; | |
784 | GBool haveSIZ, haveCOD, haveQCD, haveSOT; | |
785 | Guint precinctSize, style; | |
786 | Guint segLen, capabilities, nTiles, comp, i, j, r; | |
787 | ||
788 | //----- main header | |
789 | haveSIZ = haveCOD = haveQCD = haveSOT = gFalse; | |
790 | do { | |
791 | if (!readMarkerHdr(&segType, &segLen)) { | |
792 | error(getPos(), "Error in JPX codestream"); | |
793 | return gFalse; | |
794 | } | |
795 | switch (segType) { | |
796 | case 0x4f: // SOC - start of codestream | |
797 | // marker only | |
798 | break; | |
799 | case 0x51: // SIZ - image and tile size | |
800 | if (!readUWord(&capabilities) || | |
801 | !readULong(&img.xSize) || | |
802 | !readULong(&img.ySize) || | |
803 | !readULong(&img.xOffset) || | |
804 | !readULong(&img.yOffset) || | |
805 | !readULong(&img.xTileSize) || | |
806 | !readULong(&img.yTileSize) || | |
807 | !readULong(&img.xTileOffset) || | |
808 | !readULong(&img.yTileOffset) || | |
809 | !readUWord(&img.nComps)) { | |
810 | error(getPos(), "Error in JPX SIZ marker segment"); | |
811 | return gFalse; | |
812 | } | |
813 | if (haveImgHdr && img.nComps != nComps) { | |
814 | error(getPos(), "Different number of components in JPX SIZ marker segment"); | |
815 | return gFalse; | |
816 | } | |
817 | img.nXTiles = (img.xSize - img.xTileOffset + img.xTileSize - 1) | |
818 | / img.xTileSize; | |
819 | img.nYTiles = (img.ySize - img.yTileOffset + img.yTileSize - 1) | |
820 | / img.yTileSize; | |
821 | nTiles = img.nXTiles * img.nYTiles; | |
822 | // check for overflow before allocating memory | |
823 | if (nTiles == 0 || nTiles / img.nXTiles != img.nYTiles) { | |
824 | error(getPos(), "Bad tile count in JPX SIZ marker segment"); | |
825 | return gFalse; | |
826 | } | |
827 | img.tiles = (JPXTile *)gmallocn(nTiles, sizeof(JPXTile)); | |
828 | for (i = 0; i < img.nXTiles * img.nYTiles; ++i) { | |
829 | img.tiles[i].tileComps = (JPXTileComp *)gmallocn(img.nComps, | |
830 | sizeof(JPXTileComp)); | |
831 | for (comp = 0; comp < img.nComps; ++comp) { | |
832 | img.tiles[i].tileComps[comp].quantSteps = NULL; | |
833 | img.tiles[i].tileComps[comp].data = NULL; | |
834 | img.tiles[i].tileComps[comp].buf = NULL; | |
835 | img.tiles[i].tileComps[comp].resLevels = NULL; | |
836 | } | |
837 | } | |
838 | for (comp = 0; comp < img.nComps; ++comp) { | |
839 | if (!readUByte(&img.tiles[0].tileComps[comp].prec) || | |
840 | !readUByte(&img.tiles[0].tileComps[comp].hSep) || | |
841 | !readUByte(&img.tiles[0].tileComps[comp].vSep)) { | |
842 | error(getPos(), "Error in JPX SIZ marker segment"); | |
843 | return gFalse; | |
844 | } | |
845 | img.tiles[0].tileComps[comp].sgned = | |
846 | (img.tiles[0].tileComps[comp].prec & 0x80) ? gTrue : gFalse; | |
847 | img.tiles[0].tileComps[comp].prec = | |
848 | (img.tiles[0].tileComps[comp].prec & 0x7f) + 1; | |
849 | for (i = 1; i < img.nXTiles * img.nYTiles; ++i) { | |
850 | img.tiles[i].tileComps[comp] = img.tiles[0].tileComps[comp]; | |
851 | } | |
852 | } | |
853 | haveSIZ = gTrue; | |
854 | break; | |
855 | case 0x52: // COD - coding style default | |
856 | if (!readUByte(&img.tiles[0].tileComps[0].style) || | |
857 | !readUByte(&img.tiles[0].progOrder) || | |
858 | !readUWord(&img.tiles[0].nLayers) || | |
859 | !readUByte(&img.tiles[0].multiComp) || | |
860 | !readUByte(&img.tiles[0].tileComps[0].nDecompLevels) || | |
861 | !readUByte(&img.tiles[0].tileComps[0].codeBlockW) || | |
862 | !readUByte(&img.tiles[0].tileComps[0].codeBlockH) || | |
863 | !readUByte(&img.tiles[0].tileComps[0].codeBlockStyle) || | |
864 | !readUByte(&img.tiles[0].tileComps[0].transform)) { | |
865 | error(getPos(), "Error in JPX COD marker segment"); | |
866 | return gFalse; | |
867 | } | |
868 | img.tiles[0].tileComps[0].codeBlockW += 2; | |
869 | img.tiles[0].tileComps[0].codeBlockH += 2; | |
870 | for (i = 0; i < img.nXTiles * img.nYTiles; ++i) { | |
871 | if (i != 0) { | |
872 | img.tiles[i].progOrder = img.tiles[0].progOrder; | |
873 | img.tiles[i].nLayers = img.tiles[0].nLayers; | |
874 | img.tiles[i].multiComp = img.tiles[0].multiComp; | |
875 | } | |
876 | for (comp = 0; comp < img.nComps; ++comp) { | |
877 | if (!(i == 0 && comp == 0)) { | |
878 | img.tiles[i].tileComps[comp].style = | |
879 | img.tiles[0].tileComps[0].style; | |
880 | img.tiles[i].tileComps[comp].nDecompLevels = | |
881 | img.tiles[0].tileComps[0].nDecompLevels; | |
882 | img.tiles[i].tileComps[comp].codeBlockW = | |
883 | img.tiles[0].tileComps[0].codeBlockW; | |
884 | img.tiles[i].tileComps[comp].codeBlockH = | |
885 | img.tiles[0].tileComps[0].codeBlockH; | |
886 | img.tiles[i].tileComps[comp].codeBlockStyle = | |
887 | img.tiles[0].tileComps[0].codeBlockStyle; | |
888 | img.tiles[i].tileComps[comp].transform = | |
889 | img.tiles[0].tileComps[0].transform; | |
890 | } | |
891 | img.tiles[i].tileComps[comp].resLevels = | |
892 | (JPXResLevel *)gmallocn( | |
893 | (img.tiles[i].tileComps[comp].nDecompLevels + 1), | |
894 | sizeof(JPXResLevel)); | |
895 | for (r = 0; r <= img.tiles[i].tileComps[comp].nDecompLevels; ++r) { | |
896 | img.tiles[i].tileComps[comp].resLevels[r].precincts = NULL; | |
897 | } | |
898 | } | |
899 | } | |
900 | for (r = 0; r <= img.tiles[0].tileComps[0].nDecompLevels; ++r) { | |
901 | if (img.tiles[0].tileComps[0].style & 0x01) { | |
902 | if (!readUByte(&precinctSize)) { | |
903 | error(getPos(), "Error in JPX COD marker segment"); | |
904 | return gFalse; | |
905 | } | |
906 | img.tiles[0].tileComps[0].resLevels[r].precinctWidth = | |
907 | precinctSize & 0x0f; | |
908 | img.tiles[0].tileComps[0].resLevels[r].precinctHeight = | |
909 | (precinctSize >> 4) & 0x0f; | |
910 | } else { | |
911 | img.tiles[0].tileComps[0].resLevels[r].precinctWidth = 15; | |
912 | img.tiles[0].tileComps[0].resLevels[r].precinctHeight = 15; | |
913 | } | |
914 | } | |
915 | for (i = 0; i < img.nXTiles * img.nYTiles; ++i) { | |
916 | for (comp = 0; comp < img.nComps; ++comp) { | |
917 | if (!(i == 0 && comp == 0)) { | |
918 | for (r = 0; r <= img.tiles[i].tileComps[comp].nDecompLevels; ++r) { | |
919 | img.tiles[i].tileComps[comp].resLevels[r].precinctWidth = | |
920 | img.tiles[0].tileComps[0].resLevels[r].precinctWidth; | |
921 | img.tiles[i].tileComps[comp].resLevels[r].precinctHeight = | |
922 | img.tiles[0].tileComps[0].resLevels[r].precinctHeight; | |
923 | } | |
924 | } | |
925 | } | |
926 | } | |
927 | haveCOD = gTrue; | |
928 | break; | |
929 | case 0x53: // COC - coding style component | |
930 | if (!haveCOD) { | |
931 | error(getPos(), "JPX COC marker segment before COD segment"); | |
932 | return gFalse; | |
933 | } | |
934 | if ((img.nComps > 256 && !readUWord(&comp)) || | |
935 | (img.nComps <= 256 && !readUByte(&comp)) || | |
936 | comp >= img.nComps || | |
937 | !readUByte(&style) || | |
938 | !readUByte(&img.tiles[0].tileComps[comp].nDecompLevels) || | |
939 | !readUByte(&img.tiles[0].tileComps[comp].codeBlockW) || | |
940 | !readUByte(&img.tiles[0].tileComps[comp].codeBlockH) || | |
941 | !readUByte(&img.tiles[0].tileComps[comp].codeBlockStyle) || | |
942 | !readUByte(&img.tiles[0].tileComps[comp].transform)) { | |
943 | error(getPos(), "Error in JPX COC marker segment"); | |
944 | return gFalse; | |
945 | } | |
946 | img.tiles[0].tileComps[comp].style = | |
947 | (img.tiles[0].tileComps[comp].style & ~1) | (style & 1); | |
948 | img.tiles[0].tileComps[comp].codeBlockW += 2; | |
949 | img.tiles[0].tileComps[comp].codeBlockH += 2; | |
950 | for (i = 0; i < img.nXTiles * img.nYTiles; ++i) { | |
951 | if (i != 0) { | |
952 | img.tiles[i].tileComps[comp].style = | |
953 | img.tiles[0].tileComps[comp].style; | |
954 | img.tiles[i].tileComps[comp].nDecompLevels = | |
955 | img.tiles[0].tileComps[comp].nDecompLevels; | |
956 | img.tiles[i].tileComps[comp].codeBlockW = | |
957 | img.tiles[0].tileComps[comp].codeBlockW; | |
958 | img.tiles[i].tileComps[comp].codeBlockH = | |
959 | img.tiles[0].tileComps[comp].codeBlockH; | |
960 | img.tiles[i].tileComps[comp].codeBlockStyle = | |
961 | img.tiles[0].tileComps[comp].codeBlockStyle; | |
962 | img.tiles[i].tileComps[comp].transform = | |
963 | img.tiles[0].tileComps[comp].transform; | |
964 | } | |
965 | img.tiles[i].tileComps[comp].resLevels = | |
966 | (JPXResLevel *)greallocn( | |
967 | img.tiles[i].tileComps[comp].resLevels, | |
968 | (img.tiles[i].tileComps[comp].nDecompLevels + 1), | |
969 | sizeof(JPXResLevel)); | |
970 | for (r = 0; r <= img.tiles[i].tileComps[comp].nDecompLevels; ++r) { | |
971 | img.tiles[i].tileComps[comp].resLevels[r].precincts = NULL; | |
972 | } | |
973 | } | |
974 | for (r = 0; r <= img.tiles[0].tileComps[comp].nDecompLevels; ++r) { | |
975 | if (img.tiles[0].tileComps[comp].style & 0x01) { | |
976 | if (!readUByte(&precinctSize)) { | |
977 | error(getPos(), "Error in JPX COD marker segment"); | |
978 | return gFalse; | |
979 | } | |
980 | img.tiles[0].tileComps[comp].resLevels[r].precinctWidth = | |
981 | precinctSize & 0x0f; | |
982 | img.tiles[0].tileComps[comp].resLevels[r].precinctHeight = | |
983 | (precinctSize >> 4) & 0x0f; | |
984 | } else { | |
985 | img.tiles[0].tileComps[comp].resLevels[r].precinctWidth = 15; | |
986 | img.tiles[0].tileComps[comp].resLevels[r].precinctHeight = 15; | |
987 | } | |
988 | } | |
989 | for (i = 1; i < img.nXTiles * img.nYTiles; ++i) { | |
990 | for (r = 0; r <= img.tiles[i].tileComps[comp].nDecompLevels; ++r) { | |
991 | img.tiles[i].tileComps[comp].resLevels[r].precinctWidth = | |
992 | img.tiles[0].tileComps[comp].resLevels[r].precinctWidth; | |
993 | img.tiles[i].tileComps[comp].resLevels[r].precinctHeight = | |
994 | img.tiles[0].tileComps[comp].resLevels[r].precinctHeight; | |
995 | } | |
996 | } | |
997 | break; | |
998 | case 0x5c: // QCD - quantization default | |
999 | if (!readUByte(&img.tiles[0].tileComps[0].quantStyle)) { | |
1000 | error(getPos(), "Error in JPX QCD marker segment"); | |
1001 | return gFalse; | |
1002 | } | |
1003 | if ((img.tiles[0].tileComps[0].quantStyle & 0x1f) == 0x00) { | |
1004 | img.tiles[0].tileComps[0].nQuantSteps = segLen - 3; | |
1005 | img.tiles[0].tileComps[0].quantSteps = | |
1006 | (Guint *)greallocn(img.tiles[0].tileComps[0].quantSteps, | |
1007 | img.tiles[0].tileComps[0].nQuantSteps, | |
1008 | sizeof(Guint)); | |
1009 | for (i = 0; i < img.tiles[0].tileComps[0].nQuantSteps; ++i) { | |
1010 | if (!readUByte(&img.tiles[0].tileComps[0].quantSteps[i])) { | |
1011 | error(getPos(), "Error in JPX QCD marker segment"); | |
1012 | return gFalse; | |
1013 | } | |
1014 | } | |
1015 | } else if ((img.tiles[0].tileComps[0].quantStyle & 0x1f) == 0x01) { | |
1016 | img.tiles[0].tileComps[0].nQuantSteps = 1; | |
1017 | img.tiles[0].tileComps[0].quantSteps = | |
1018 | (Guint *)greallocn(img.tiles[0].tileComps[0].quantSteps, | |
1019 | img.tiles[0].tileComps[0].nQuantSteps, | |
1020 | sizeof(Guint)); | |
1021 | if (!readUWord(&img.tiles[0].tileComps[0].quantSteps[0])) { | |
1022 | error(getPos(), "Error in JPX QCD marker segment"); | |
1023 | return gFalse; | |
1024 | } | |
1025 | } else if ((img.tiles[0].tileComps[0].quantStyle & 0x1f) == 0x02) { | |
1026 | img.tiles[0].tileComps[0].nQuantSteps = (segLen - 3) / 2; | |
1027 | img.tiles[0].tileComps[0].quantSteps = | |
1028 | (Guint *)greallocn(img.tiles[0].tileComps[0].quantSteps, | |
1029 | img.tiles[0].tileComps[0].nQuantSteps, | |
1030 | sizeof(Guint)); | |
1031 | for (i = 0; i < img.tiles[0].tileComps[0].nQuantSteps; ++i) { | |
1032 | if (!readUWord(&img.tiles[0].tileComps[0].quantSteps[i])) { | |
1033 | error(getPos(), "Error in JPX QCD marker segment"); | |
1034 | return gFalse; | |
1035 | } | |
1036 | } | |
1037 | } else { | |
1038 | error(getPos(), "Error in JPX QCD marker segment"); | |
1039 | return gFalse; | |
1040 | } | |
1041 | for (i = 0; i < img.nXTiles * img.nYTiles; ++i) { | |
1042 | for (comp = 0; comp < img.nComps; ++comp) { | |
1043 | if (!(i == 0 && comp == 0)) { | |
1044 | img.tiles[i].tileComps[comp].quantStyle = | |
1045 | img.tiles[0].tileComps[0].quantStyle; | |
1046 | img.tiles[i].tileComps[comp].nQuantSteps = | |
1047 | img.tiles[0].tileComps[0].nQuantSteps; | |
1048 | img.tiles[i].tileComps[comp].quantSteps = | |
1049 | (Guint *)greallocn(img.tiles[i].tileComps[comp].quantSteps, | |
1050 | img.tiles[0].tileComps[0].nQuantSteps, | |
1051 | sizeof(Guint)); | |
1052 | for (j = 0; j < img.tiles[0].tileComps[0].nQuantSteps; ++j) { | |
1053 | img.tiles[i].tileComps[comp].quantSteps[j] = | |
1054 | img.tiles[0].tileComps[0].quantSteps[j]; | |
1055 | } | |
1056 | } | |
1057 | } | |
1058 | } | |
1059 | haveQCD = gTrue; | |
1060 | break; | |
1061 | case 0x5d: // QCC - quantization component | |
1062 | if (!haveQCD) { | |
1063 | error(getPos(), "JPX QCC marker segment before QCD segment"); | |
1064 | return gFalse; | |
1065 | } | |
1066 | if ((img.nComps > 256 && !readUWord(&comp)) || | |
1067 | (img.nComps <= 256 && !readUByte(&comp)) || | |
1068 | comp >= img.nComps || | |
1069 | !readUByte(&img.tiles[0].tileComps[comp].quantStyle)) { | |
1070 | error(getPos(), "Error in JPX QCC marker segment"); | |
1071 | return gFalse; | |
1072 | } | |
1073 | if ((img.tiles[0].tileComps[comp].quantStyle & 0x1f) == 0x00) { | |
1074 | img.tiles[0].tileComps[comp].nQuantSteps = | |
1075 | segLen - (img.nComps > 256 ? 5 : 4); | |
1076 | img.tiles[0].tileComps[comp].quantSteps = | |
1077 | (Guint *)greallocn(img.tiles[0].tileComps[comp].quantSteps, | |
1078 | img.tiles[0].tileComps[comp].nQuantSteps, | |
1079 | sizeof(Guint)); | |
1080 | for (i = 0; i < img.tiles[0].tileComps[comp].nQuantSteps; ++i) { | |
1081 | if (!readUByte(&img.tiles[0].tileComps[comp].quantSteps[i])) { | |
1082 | error(getPos(), "Error in JPX QCC marker segment"); | |
1083 | return gFalse; | |
1084 | } | |
1085 | } | |
1086 | } else if ((img.tiles[0].tileComps[comp].quantStyle & 0x1f) == 0x01) { | |
1087 | img.tiles[0].tileComps[comp].nQuantSteps = 1; | |
1088 | img.tiles[0].tileComps[comp].quantSteps = | |
1089 | (Guint *)greallocn(img.tiles[0].tileComps[comp].quantSteps, | |
1090 | img.tiles[0].tileComps[comp].nQuantSteps, | |
1091 | sizeof(Guint)); | |
1092 | if (!readUWord(&img.tiles[0].tileComps[comp].quantSteps[0])) { | |
1093 | error(getPos(), "Error in JPX QCC marker segment"); | |
1094 | return gFalse; | |
1095 | } | |
1096 | } else if ((img.tiles[0].tileComps[comp].quantStyle & 0x1f) == 0x02) { | |
1097 | img.tiles[0].tileComps[comp].nQuantSteps = | |
1098 | (segLen - (img.nComps > 256 ? 5 : 4)) / 2; | |
1099 | img.tiles[0].tileComps[comp].quantSteps = | |
1100 | (Guint *)greallocn(img.tiles[0].tileComps[comp].quantSteps, | |
1101 | img.tiles[0].tileComps[comp].nQuantSteps, | |
1102 | sizeof(Guint)); | |
1103 | for (i = 0; i < img.tiles[0].tileComps[comp].nQuantSteps; ++i) { | |
1104 | if (!readUWord(&img.tiles[0].tileComps[comp].quantSteps[i])) { | |
1105 | error(getPos(), "Error in JPX QCD marker segment"); | |
1106 | return gFalse; | |
1107 | } | |
1108 | } | |
1109 | } else { | |
1110 | error(getPos(), "Error in JPX QCC marker segment"); | |
1111 | return gFalse; | |
1112 | } | |
1113 | for (i = 1; i < img.nXTiles * img.nYTiles; ++i) { | |
1114 | img.tiles[i].tileComps[comp].quantStyle = | |
1115 | img.tiles[0].tileComps[comp].quantStyle; | |
1116 | img.tiles[i].tileComps[comp].nQuantSteps = | |
1117 | img.tiles[0].tileComps[comp].nQuantSteps; | |
1118 | img.tiles[i].tileComps[comp].quantSteps = | |
1119 | (Guint *)greallocn(img.tiles[i].tileComps[comp].quantSteps, | |
1120 | img.tiles[0].tileComps[comp].nQuantSteps, | |
1121 | sizeof(Guint)); | |
1122 | for (j = 0; j < img.tiles[0].tileComps[comp].nQuantSteps; ++j) { | |
1123 | img.tiles[i].tileComps[comp].quantSteps[j] = | |
1124 | img.tiles[0].tileComps[comp].quantSteps[j]; | |
1125 | } | |
1126 | } | |
1127 | break; | |
1128 | case 0x5e: // RGN - region of interest | |
1129 | #if 1 //~ ROI is unimplemented | |
1130 | fprintf(stderr, "RGN\n"); | |
1131 | for (i = 0; i < segLen - 2; ++i) { | |
1132 | if (str->getChar() == EOF) { | |
1133 | error(getPos(), "Error in JPX PPM marker segment"); | |
1134 | return gFalse; | |
1135 | } | |
1136 | } | |
1137 | #else | |
1138 | if ((img.nComps > 256 && !readUWord(&comp)) || | |
1139 | (img.nComps <= 256 && !readUByte(&comp)) || | |
1140 | comp >= img.nComps || | |
1141 | !readUByte(&compInfo[comp].defROI.style) || | |
1142 | !readUByte(&compInfo[comp].defROI.shift)) { | |
1143 | error(getPos(), "Error in JPX RGN marker segment"); | |
1144 | return gFalse; | |
1145 | } | |
1146 | #endif | |
1147 | break; | |
1148 | case 0x5f: // POC - progression order change | |
1149 | #if 1 //~ progression order changes are unimplemented | |
1150 | fprintf(stderr, "POC\n"); | |
1151 | for (i = 0; i < segLen - 2; ++i) { | |
1152 | if (str->getChar() == EOF) { | |
1153 | error(getPos(), "Error in JPX PPM marker segment"); | |
1154 | return gFalse; | |
1155 | } | |
1156 | } | |
1157 | #else | |
1158 | nProgs = (segLen - 2) / (img.nComps > 256 ? 9 : 7); | |
1159 | progs = (JPXProgOrder *)gmallocn(nProgs, sizeof(JPXProgOrder)); | |
1160 | for (i = 0; i < nProgs; ++i) { | |
1161 | if (!readUByte(&progs[i].startRes) || | |
1162 | !(img.nComps > 256 && readUWord(&progs[i].startComp)) || | |
1163 | !(img.nComps <= 256 && readUByte(&progs[i].startComp)) || | |
1164 | !readUWord(&progs[i].endLayer) || | |
1165 | !readUByte(&progs[i].endRes) || | |
1166 | !(img.nComps > 256 && readUWord(&progs[i].endComp)) || | |
1167 | !(img.nComps <= 256 && readUByte(&progs[i].endComp)) || | |
1168 | !readUByte(&progs[i].progOrder)) { | |
1169 | error(getPos(), "Error in JPX POC marker segment"); | |
1170 | return gFalse; | |
1171 | } | |
1172 | } | |
1173 | #endif | |
1174 | break; | |
1175 | case 0x60: // PPM - packed packet headers, main header | |
1176 | #if 1 //~ packed packet headers are unimplemented | |
1177 | fprintf(stderr, "PPM\n"); | |
1178 | for (i = 0; i < segLen - 2; ++i) { | |
1179 | if (str->getChar() == EOF) { | |
1180 | error(getPos(), "Error in JPX PPM marker segment"); | |
1181 | return gFalse; | |
1182 | } | |
1183 | } | |
1184 | #endif | |
1185 | break; | |
1186 | case 0x55: // TLM - tile-part lengths | |
1187 | // skipped | |
1188 | for (i = 0; i < segLen - 2; ++i) { | |
1189 | if (str->getChar() == EOF) { | |
1190 | error(getPos(), "Error in JPX TLM marker segment"); | |
1191 | return gFalse; | |
1192 | } | |
1193 | } | |
1194 | break; | |
1195 | case 0x57: // PLM - packet length, main header | |
1196 | // skipped | |
1197 | for (i = 0; i < segLen - 2; ++i) { | |
1198 | if (str->getChar() == EOF) { | |
1199 | error(getPos(), "Error in JPX PLM marker segment"); | |
1200 | return gFalse; | |
1201 | } | |
1202 | } | |
1203 | break; | |
1204 | case 0x63: // CRG - component registration | |
1205 | // skipped | |
1206 | for (i = 0; i < segLen - 2; ++i) { | |
1207 | if (str->getChar() == EOF) { | |
1208 | error(getPos(), "Error in JPX CRG marker segment"); | |
1209 | return gFalse; | |
1210 | } | |
1211 | } | |
1212 | break; | |
1213 | case 0x64: // COM - comment | |
1214 | // skipped | |
1215 | for (i = 0; i < segLen - 2; ++i) { | |
1216 | if (str->getChar() == EOF) { | |
1217 | error(getPos(), "Error in JPX COM marker segment"); | |
1218 | return gFalse; | |
1219 | } | |
1220 | } | |
1221 | break; | |
1222 | case 0x90: // SOT - start of tile | |
1223 | haveSOT = gTrue; | |
1224 | break; | |
1225 | default: | |
1226 | error(getPos(), "Unknown marker segment %02x in JPX stream", segType); | |
1227 | for (i = 0; i < segLen - 2; ++i) { | |
1228 | if (str->getChar() == EOF) { | |
1229 | break; | |
1230 | } | |
1231 | } | |
1232 | break; | |
1233 | } | |
1234 | } while (!haveSOT); | |
1235 | ||
1236 | if (!haveSIZ) { | |
1237 | error(getPos(), "Missing SIZ marker segment in JPX stream"); | |
1238 | return gFalse; | |
1239 | } | |
1240 | if (!haveCOD) { | |
1241 | error(getPos(), "Missing COD marker segment in JPX stream"); | |
1242 | return gFalse; | |
1243 | } | |
1244 | if (!haveQCD) { | |
1245 | error(getPos(), "Missing QCD marker segment in JPX stream"); | |
1246 | return gFalse; | |
1247 | } | |
1248 | ||
1249 | //----- read the tile-parts | |
1250 | while (1) { | |
1251 | if (!readTilePart()) { | |
1252 | return gFalse; | |
1253 | } | |
1254 | if (!readMarkerHdr(&segType, &segLen)) { | |
1255 | error(getPos(), "Error in JPX codestream"); | |
1256 | return gFalse; | |
1257 | } | |
1258 | if (segType != 0x90) { // SOT - start of tile | |
1259 | break; | |
1260 | } | |
1261 | } | |
1262 | ||
1263 | if (segType != 0xd9) { // EOC - end of codestream | |
1264 | error(getPos(), "Missing EOC marker in JPX codestream"); | |
1265 | return gFalse; | |
1266 | } | |
1267 | ||
1268 | //----- finish decoding the image | |
1269 | for (i = 0; i < img.nXTiles * img.nYTiles; ++i) { | |
1270 | tile = &img.tiles[i]; | |
1271 | for (comp = 0; comp < img.nComps; ++comp) { | |
1272 | tileComp = &tile->tileComps[comp]; | |
1273 | inverseTransform(tileComp); | |
1274 | } | |
1275 | if (!inverseMultiCompAndDC(tile)) { | |
1276 | return gFalse; | |
1277 | } | |
1278 | } | |
1279 | ||
1280 | //~ can free memory below tileComps here, and also tileComp.buf | |
1281 | ||
1282 | return gTrue; | |
1283 | } | |
1284 | ||
1285 | GBool JPXStream::readTilePart() { | |
1286 | JPXTile *tile; | |
1287 | JPXTileComp *tileComp; | |
1288 | JPXResLevel *resLevel; | |
1289 | JPXPrecinct *precinct; | |
1290 | JPXSubband *subband; | |
1291 | JPXCodeBlock *cb; | |
1292 | GBool haveSOD; | |
1293 | Guint tileIdx, tilePartLen, tilePartIdx, nTileParts; | |
1294 | GBool tilePartToEOC; | |
1295 | Guint precinctSize, style; | |
1296 | Guint n, nSBs, nx, ny, sbx0, sby0, comp, segLen; | |
1297 | Guint i, j, k, cbX, cbY, r, pre, sb, cbi; | |
1298 | int segType, level; | |
1299 | ||
1300 | // process the SOT marker segment | |
1301 | if (!readUWord(&tileIdx) || | |
1302 | !readULong(&tilePartLen) || | |
1303 | !readUByte(&tilePartIdx) || | |
1304 | !readUByte(&nTileParts)) { | |
1305 | error(getPos(), "Error in JPX SOT marker segment"); | |
1306 | return gFalse; | |
1307 | } | |
1308 | ||
1309 | if (tileIdx >= img.nXTiles * img.nYTiles) { | |
1310 | error(getPos(), "Weird tile index in JPX stream"); | |
1311 | return gFalse; | |
1312 | } | |
1313 | ||
1314 | tilePartToEOC = tilePartLen == 0; | |
1315 | tilePartLen -= 12; // subtract size of SOT segment | |
1316 | ||
1317 | haveSOD = gFalse; | |
1318 | do { | |
1319 | if (!readMarkerHdr(&segType, &segLen)) { | |
1320 | error(getPos(), "Error in JPX tile-part codestream"); | |
1321 | return gFalse; | |
1322 | } | |
1323 | tilePartLen -= 2 + segLen; | |
1324 | switch (segType) { | |
1325 | case 0x52: // COD - coding style default | |
1326 | if (!readUByte(&img.tiles[tileIdx].tileComps[0].style) || | |
1327 | !readUByte(&img.tiles[tileIdx].progOrder) || | |
1328 | !readUWord(&img.tiles[tileIdx].nLayers) || | |
1329 | !readUByte(&img.tiles[tileIdx].multiComp) || | |
1330 | !readUByte(&img.tiles[tileIdx].tileComps[0].nDecompLevels) || | |
1331 | !readUByte(&img.tiles[tileIdx].tileComps[0].codeBlockW) || | |
1332 | !readUByte(&img.tiles[tileIdx].tileComps[0].codeBlockH) || | |
1333 | !readUByte(&img.tiles[tileIdx].tileComps[0].codeBlockStyle) || | |
1334 | !readUByte(&img.tiles[tileIdx].tileComps[0].transform)) { | |
1335 | error(getPos(), "Error in JPX COD marker segment"); | |
1336 | return gFalse; | |
1337 | } | |
1338 | img.tiles[tileIdx].tileComps[0].codeBlockW += 2; | |
1339 | img.tiles[tileIdx].tileComps[0].codeBlockH += 2; | |
1340 | for (comp = 0; comp < img.nComps; ++comp) { | |
1341 | if (comp != 0) { | |
1342 | img.tiles[tileIdx].tileComps[comp].style = | |
1343 | img.tiles[tileIdx].tileComps[0].style; | |
1344 | img.tiles[tileIdx].tileComps[comp].nDecompLevels = | |
1345 | img.tiles[tileIdx].tileComps[0].nDecompLevels; | |
1346 | img.tiles[tileIdx].tileComps[comp].codeBlockW = | |
1347 | img.tiles[tileIdx].tileComps[0].codeBlockW; | |
1348 | img.tiles[tileIdx].tileComps[comp].codeBlockH = | |
1349 | img.tiles[tileIdx].tileComps[0].codeBlockH; | |
1350 | img.tiles[tileIdx].tileComps[comp].codeBlockStyle = | |
1351 | img.tiles[tileIdx].tileComps[0].codeBlockStyle; | |
1352 | img.tiles[tileIdx].tileComps[comp].transform = | |
1353 | img.tiles[tileIdx].tileComps[0].transform; | |
1354 | } | |
1355 | img.tiles[tileIdx].tileComps[comp].resLevels = | |
1356 | (JPXResLevel *)greallocn( | |
1357 | img.tiles[tileIdx].tileComps[comp].resLevels, | |
1358 | (img.tiles[tileIdx].tileComps[comp].nDecompLevels + 1), | |
1359 | sizeof(JPXResLevel)); | |
1360 | for (r = 0; | |
1361 | r <= img.tiles[tileIdx].tileComps[comp].nDecompLevels; | |
1362 | ++r) { | |
1363 | img.tiles[tileIdx].tileComps[comp].resLevels[r].precincts = NULL; | |
1364 | } | |
1365 | } | |
1366 | for (r = 0; r <= img.tiles[tileIdx].tileComps[0].nDecompLevels; ++r) { | |
1367 | if (img.tiles[tileIdx].tileComps[0].style & 0x01) { | |
1368 | if (!readUByte(&precinctSize)) { | |
1369 | error(getPos(), "Error in JPX COD marker segment"); | |
1370 | return gFalse; | |
1371 | } | |
1372 | img.tiles[tileIdx].tileComps[0].resLevels[r].precinctWidth = | |
1373 | precinctSize & 0x0f; | |
1374 | img.tiles[tileIdx].tileComps[0].resLevels[r].precinctHeight = | |
1375 | (precinctSize >> 4) & 0x0f; | |
1376 | } else { | |
1377 | img.tiles[tileIdx].tileComps[0].resLevels[r].precinctWidth = 15; | |
1378 | img.tiles[tileIdx].tileComps[0].resLevels[r].precinctHeight = 15; | |
1379 | } | |
1380 | } | |
1381 | for (comp = 1; comp < img.nComps; ++comp) { | |
1382 | for (r = 0; | |
1383 | r <= img.tiles[tileIdx].tileComps[comp].nDecompLevels; | |
1384 | ++r) { | |
1385 | img.tiles[tileIdx].tileComps[comp].resLevels[r].precinctWidth = | |
1386 | img.tiles[tileIdx].tileComps[0].resLevels[r].precinctWidth; | |
1387 | img.tiles[tileIdx].tileComps[comp].resLevels[r].precinctHeight = | |
1388 | img.tiles[tileIdx].tileComps[0].resLevels[r].precinctHeight; | |
1389 | } | |
1390 | } | |
1391 | break; | |
1392 | case 0x53: // COC - coding style component | |
1393 | if ((img.nComps > 256 && !readUWord(&comp)) || | |
1394 | (img.nComps <= 256 && !readUByte(&comp)) || | |
1395 | comp >= img.nComps || | |
1396 | !readUByte(&style) || | |
1397 | !readUByte(&img.tiles[tileIdx].tileComps[comp].nDecompLevels) || | |
1398 | !readUByte(&img.tiles[tileIdx].tileComps[comp].codeBlockW) || | |
1399 | !readUByte(&img.tiles[tileIdx].tileComps[comp].codeBlockH) || | |
1400 | !readUByte(&img.tiles[tileIdx].tileComps[comp].codeBlockStyle) || | |
1401 | !readUByte(&img.tiles[tileIdx].tileComps[comp].transform)) { | |
1402 | error(getPos(), "Error in JPX COC marker segment"); | |
1403 | return gFalse; | |
1404 | } | |
1405 | img.tiles[tileIdx].tileComps[comp].style = | |
1406 | (img.tiles[tileIdx].tileComps[comp].style & ~1) | (style & 1); | |
1407 | img.tiles[tileIdx].tileComps[comp].codeBlockW += 2; | |
1408 | img.tiles[tileIdx].tileComps[comp].codeBlockH += 2; | |
1409 | img.tiles[tileIdx].tileComps[comp].resLevels = | |
1410 | (JPXResLevel *)greallocn( | |
1411 | img.tiles[tileIdx].tileComps[comp].resLevels, | |
1412 | (img.tiles[tileIdx].tileComps[comp].nDecompLevels + 1), | |
1413 | sizeof(JPXResLevel)); | |
1414 | for (r = 0; r <= img.tiles[tileIdx].tileComps[comp].nDecompLevels; ++r) { | |
1415 | img.tiles[tileIdx].tileComps[comp].resLevels[r].precincts = NULL; | |
1416 | } | |
1417 | for (r = 0; r <= img.tiles[tileIdx].tileComps[comp].nDecompLevels; ++r) { | |
1418 | if (img.tiles[tileIdx].tileComps[comp].style & 0x01) { | |
1419 | if (!readUByte(&precinctSize)) { | |
1420 | error(getPos(), "Error in JPX COD marker segment"); | |
1421 | return gFalse; | |
1422 | } | |
1423 | img.tiles[tileIdx].tileComps[comp].resLevels[r].precinctWidth = | |
1424 | precinctSize & 0x0f; | |
1425 | img.tiles[tileIdx].tileComps[comp].resLevels[r].precinctHeight = | |
1426 | (precinctSize >> 4) & 0x0f; | |
1427 | } else { | |
1428 | img.tiles[tileIdx].tileComps[comp].resLevels[r].precinctWidth = 15; | |
1429 | img.tiles[tileIdx].tileComps[comp].resLevels[r].precinctHeight = 15; | |
1430 | } | |
1431 | } | |
1432 | break; | |
1433 | case 0x5c: // QCD - quantization default | |
1434 | if (!readUByte(&img.tiles[tileIdx].tileComps[0].quantStyle)) { | |
1435 | error(getPos(), "Error in JPX QCD marker segment"); | |
1436 | return gFalse; | |
1437 | } | |
1438 | if ((img.tiles[tileIdx].tileComps[0].quantStyle & 0x1f) == 0x00) { | |
1439 | img.tiles[tileIdx].tileComps[0].nQuantSteps = | |
1440 | segLen - 3; | |
1441 | img.tiles[tileIdx].tileComps[0].quantSteps = | |
1442 | (Guint *)greallocn(img.tiles[tileIdx].tileComps[0].quantSteps, | |
1443 | img.tiles[tileIdx].tileComps[0].nQuantSteps, | |
1444 | sizeof(Guint)); | |
1445 | for (i = 0; i < img.tiles[tileIdx].tileComps[0].nQuantSteps; ++i) { | |
1446 | if (!readUByte(&img.tiles[tileIdx].tileComps[0].quantSteps[i])) { | |
1447 | error(getPos(), "Error in JPX QCD marker segment"); | |
1448 | return gFalse; | |
1449 | } | |
1450 | } | |
1451 | } else if ((img.tiles[tileIdx].tileComps[0].quantStyle & 0x1f) == 0x01) { | |
1452 | img.tiles[tileIdx].tileComps[0].nQuantSteps = 1; | |
1453 | img.tiles[tileIdx].tileComps[0].quantSteps = | |
1454 | (Guint *)greallocn(img.tiles[tileIdx].tileComps[0].quantSteps, | |
1455 | img.tiles[tileIdx].tileComps[0].nQuantSteps, | |
1456 | sizeof(Guint)); | |
1457 | if (!readUWord(&img.tiles[tileIdx].tileComps[0].quantSteps[0])) { | |
1458 | error(getPos(), "Error in JPX QCD marker segment"); | |
1459 | return gFalse; | |
1460 | } | |
1461 | } else if ((img.tiles[tileIdx].tileComps[0].quantStyle & 0x1f) == 0x02) { | |
1462 | img.tiles[tileIdx].tileComps[0].nQuantSteps = (segLen - 3) / 2; | |
1463 | img.tiles[tileIdx].tileComps[0].quantSteps = | |
1464 | (Guint *)greallocn(img.tiles[tileIdx].tileComps[0].quantSteps, | |
1465 | img.tiles[tileIdx].tileComps[0].nQuantSteps, | |
1466 | sizeof(Guint)); | |
1467 | for (i = 0; i < img.tiles[tileIdx].tileComps[0].nQuantSteps; ++i) { | |
1468 | if (!readUWord(&img.tiles[tileIdx].tileComps[0].quantSteps[i])) { | |
1469 | error(getPos(), "Error in JPX QCD marker segment"); | |
1470 | return gFalse; | |
1471 | } | |
1472 | } | |
1473 | } else { | |
1474 | error(getPos(), "Error in JPX QCD marker segment"); | |
1475 | return gFalse; | |
1476 | } | |
1477 | for (comp = 1; comp < img.nComps; ++comp) { | |
1478 | img.tiles[tileIdx].tileComps[comp].quantStyle = | |
1479 | img.tiles[tileIdx].tileComps[0].quantStyle; | |
1480 | img.tiles[tileIdx].tileComps[comp].nQuantSteps = | |
1481 | img.tiles[tileIdx].tileComps[0].nQuantSteps; | |
1482 | img.tiles[tileIdx].tileComps[comp].quantSteps = | |
1483 | (Guint *)greallocn(img.tiles[tileIdx].tileComps[comp].quantSteps, | |
1484 | img.tiles[tileIdx].tileComps[0].nQuantSteps, | |
1485 | sizeof(Guint)); | |
1486 | for (j = 0; j < img.tiles[tileIdx].tileComps[0].nQuantSteps; ++j) { | |
1487 | img.tiles[tileIdx].tileComps[comp].quantSteps[j] = | |
1488 | img.tiles[tileIdx].tileComps[0].quantSteps[j]; | |
1489 | } | |
1490 | } | |
1491 | break; | |
1492 | case 0x5d: // QCC - quantization component | |
1493 | if ((img.nComps > 256 && !readUWord(&comp)) || | |
1494 | (img.nComps <= 256 && !readUByte(&comp)) || | |
1495 | comp >= img.nComps || | |
1496 | !readUByte(&img.tiles[tileIdx].tileComps[comp].quantStyle)) { | |
1497 | error(getPos(), "Error in JPX QCC marker segment"); | |
1498 | return gFalse; | |
1499 | } | |
1500 | if ((img.tiles[tileIdx].tileComps[comp].quantStyle & 0x1f) == 0x00) { | |
1501 | img.tiles[tileIdx].tileComps[comp].nQuantSteps = | |
1502 | segLen - (img.nComps > 256 ? 5 : 4); | |
1503 | img.tiles[tileIdx].tileComps[comp].quantSteps = | |
1504 | (Guint *)greallocn(img.tiles[tileIdx].tileComps[comp].quantSteps, | |
1505 | img.tiles[tileIdx].tileComps[comp].nQuantSteps, | |
1506 | sizeof(Guint)); | |
1507 | for (i = 0; i < img.tiles[tileIdx].tileComps[comp].nQuantSteps; ++i) { | |
1508 | if (!readUByte(&img.tiles[tileIdx].tileComps[comp].quantSteps[i])) { | |
1509 | error(getPos(), "Error in JPX QCC marker segment"); | |
1510 | return gFalse; | |
1511 | } | |
1512 | } | |
1513 | } else if ((img.tiles[tileIdx].tileComps[comp].quantStyle & 0x1f) | |
1514 | == 0x01) { | |
1515 | img.tiles[tileIdx].tileComps[comp].nQuantSteps = 1; | |
1516 | img.tiles[tileIdx].tileComps[comp].quantSteps = | |
1517 | (Guint *)greallocn(img.tiles[tileIdx].tileComps[comp].quantSteps, | |
1518 | img.tiles[tileIdx].tileComps[comp].nQuantSteps, | |
1519 | sizeof(Guint)); | |
1520 | if (!readUWord(&img.tiles[tileIdx].tileComps[comp].quantSteps[0])) { | |
1521 | error(getPos(), "Error in JPX QCC marker segment"); | |
1522 | return gFalse; | |
1523 | } | |
1524 | } else if ((img.tiles[tileIdx].tileComps[comp].quantStyle & 0x1f) | |
1525 | == 0x02) { | |
1526 | img.tiles[tileIdx].tileComps[comp].nQuantSteps = | |
1527 | (segLen - (img.nComps > 256 ? 5 : 4)) / 2; | |
1528 | img.tiles[tileIdx].tileComps[comp].quantSteps = | |
1529 | (Guint *)greallocn(img.tiles[tileIdx].tileComps[comp].quantSteps, | |
1530 | img.tiles[tileIdx].tileComps[comp].nQuantSteps, | |
1531 | sizeof(Guint)); | |
1532 | for (i = 0; i < img.tiles[tileIdx].tileComps[comp].nQuantSteps; ++i) { | |
1533 | if (!readUWord(&img.tiles[tileIdx].tileComps[comp].quantSteps[i])) { | |
1534 | error(getPos(), "Error in JPX QCD marker segment"); | |
1535 | return gFalse; | |
1536 | } | |
1537 | } | |
1538 | } else { | |
1539 | error(getPos(), "Error in JPX QCC marker segment"); | |
1540 | return gFalse; | |
1541 | } | |
1542 | break; | |
1543 | case 0x5e: // RGN - region of interest | |
1544 | #if 1 //~ ROI is unimplemented | |
1545 | fprintf(stderr, "RGN\n"); | |
1546 | for (i = 0; i < segLen - 2; ++i) { | |
1547 | if (str->getChar() == EOF) { | |
1548 | error(getPos(), "Error in JPX PPM marker segment"); | |
1549 | return gFalse; | |
1550 | } | |
1551 | } | |
1552 | #else | |
1553 | if ((img.nComps > 256 && !readUWord(&comp)) || | |
1554 | (img.nComps <= 256 && !readUByte(&comp)) || | |
1555 | comp >= img.nComps || | |
1556 | !readUByte(&compInfo[comp].roi.style) || | |
1557 | !readUByte(&compInfo[comp].roi.shift)) { | |
1558 | error(getPos(), "Error in JPX RGN marker segment"); | |
1559 | return gFalse; | |
1560 | } | |
1561 | #endif | |
1562 | break; | |
1563 | case 0x5f: // POC - progression order change | |
1564 | #if 1 //~ progression order changes are unimplemented | |
1565 | fprintf(stderr, "POC\n"); | |
1566 | for (i = 0; i < segLen - 2; ++i) { | |
1567 | if (str->getChar() == EOF) { | |
1568 | error(getPos(), "Error in JPX PPM marker segment"); | |
1569 | return gFalse; | |
1570 | } | |
1571 | } | |
1572 | #else | |
1573 | nTileProgs = (segLen - 2) / (img.nComps > 256 ? 9 : 7); | |
1574 | tileProgs = (JPXProgOrder *)gmallocn(nTileProgs, sizeof(JPXProgOrder)); | |
1575 | for (i = 0; i < nTileProgs; ++i) { | |
1576 | if (!readUByte(&tileProgs[i].startRes) || | |
1577 | !(img.nComps > 256 && readUWord(&tileProgs[i].startComp)) || | |
1578 | !(img.nComps <= 256 && readUByte(&tileProgs[i].startComp)) || | |
1579 | !readUWord(&tileProgs[i].endLayer) || | |
1580 | !readUByte(&tileProgs[i].endRes) || | |
1581 | !(img.nComps > 256 && readUWord(&tileProgs[i].endComp)) || | |
1582 | !(img.nComps <= 256 && readUByte(&tileProgs[i].endComp)) || | |
1583 | !readUByte(&tileProgs[i].progOrder)) { | |
1584 | error(getPos(), "Error in JPX POC marker segment"); | |
1585 | return gFalse; | |
1586 | } | |
1587 | } | |
1588 | #endif | |
1589 | break; | |
1590 | case 0x61: // PPT - packed packet headers, tile-part hdr | |
1591 | #if 1 //~ packed packet headers are unimplemented | |
1592 | fprintf(stderr, "PPT\n"); | |
1593 | for (i = 0; i < segLen - 2; ++i) { | |
1594 | if (str->getChar() == EOF) { | |
1595 | error(getPos(), "Error in JPX PPT marker segment"); | |
1596 | return gFalse; | |
1597 | } | |
1598 | } | |
1599 | #endif | |
1600 | case 0x58: // PLT - packet length, tile-part header | |
1601 | // skipped | |
1602 | for (i = 0; i < segLen - 2; ++i) { | |
1603 | if (str->getChar() == EOF) { | |
1604 | error(getPos(), "Error in JPX PLT marker segment"); | |
1605 | return gFalse; | |
1606 | } | |
1607 | } | |
1608 | break; | |
1609 | case 0x64: // COM - comment | |
1610 | // skipped | |
1611 | for (i = 0; i < segLen - 2; ++i) { | |
1612 | if (str->getChar() == EOF) { | |
1613 | error(getPos(), "Error in JPX COM marker segment"); | |
1614 | return gFalse; | |
1615 | } | |
1616 | } | |
1617 | break; | |
1618 | case 0x93: // SOD - start of data | |
1619 | haveSOD = gTrue; | |
1620 | break; | |
1621 | default: | |
1622 | error(getPos(), "Unknown marker segment %02x in JPX tile-part stream", | |
1623 | segType); | |
1624 | for (i = 0; i < segLen - 2; ++i) { | |
1625 | if (str->getChar() == EOF) { | |
1626 | break; | |
1627 | } | |
1628 | } | |
1629 | break; | |
1630 | } | |
1631 | } while (!haveSOD); | |
1632 | ||
1633 | //----- initialize the tile, precincts, and code-blocks | |
1634 | if (tilePartIdx == 0) { | |
1635 | tile = &img.tiles[tileIdx]; | |
1636 | i = tileIdx / img.nXTiles; | |
1637 | j = tileIdx % img.nXTiles; | |
1638 | if ((tile->x0 = img.xTileOffset + j * img.xTileSize) < img.xOffset) { | |
1639 | tile->x0 = img.xOffset; | |
1640 | } | |
1641 | if ((tile->y0 = img.yTileOffset + i * img.yTileSize) < img.yOffset) { | |
1642 | tile->y0 = img.yOffset; | |
1643 | } | |
1644 | if ((tile->x1 = img.xTileOffset + (j + 1) * img.xTileSize) > img.xSize) { | |
1645 | tile->x1 = img.xSize; | |
1646 | } | |
1647 | if ((tile->y1 = img.yTileOffset + (i + 1) * img.yTileSize) > img.ySize) { | |
1648 | tile->y1 = img.ySize; | |
1649 | } | |
1650 | tile->comp = 0; | |
1651 | tile->res = 0; | |
1652 | tile->precinct = 0; | |
1653 | tile->layer = 0; | |
1654 | tile->maxNDecompLevels = 0; | |
1655 | for (comp = 0; comp < img.nComps; ++comp) { | |
1656 | tileComp = &tile->tileComps[comp]; | |
1657 | if (tileComp->nDecompLevels > tile->maxNDecompLevels) { | |
1658 | tile->maxNDecompLevels = tileComp->nDecompLevels; | |
1659 | } | |
1660 | tileComp->x0 = jpxCeilDiv(tile->x0, tileComp->hSep); | |
1661 | tileComp->y0 = jpxCeilDiv(tile->y0, tileComp->hSep); | |
1662 | tileComp->x1 = jpxCeilDiv(tile->x1, tileComp->hSep); | |
1663 | tileComp->y1 = jpxCeilDiv(tile->y1, tileComp->hSep); | |
1664 | tileComp->cbW = 1 << tileComp->codeBlockW; | |
1665 | tileComp->cbH = 1 << tileComp->codeBlockH; | |
1666 | tileComp->data = (int *)gmallocn((tileComp->x1 - tileComp->x0) * | |
1667 | (tileComp->y1 - tileComp->y0), | |
1668 | sizeof(int)); | |
1669 | if (tileComp->x1 - tileComp->x0 > tileComp->y1 - tileComp->y0) { | |
1670 | n = tileComp->x1 - tileComp->x0; | |
1671 | } else { | |
1672 | n = tileComp->y1 - tileComp->y0; | |
1673 | } | |
1674 | tileComp->buf = (int *)gmallocn(n + 8, sizeof(int)); | |
1675 | for (r = 0; r <= tileComp->nDecompLevels; ++r) { | |
1676 | resLevel = &tileComp->resLevels[r]; | |
1677 | k = r == 0 ? tileComp->nDecompLevels | |
1678 | : tileComp->nDecompLevels - r + 1; | |
1679 | resLevel->x0 = jpxCeilDivPow2(tileComp->x0, k); | |
1680 | resLevel->y0 = jpxCeilDivPow2(tileComp->y0, k); | |
1681 | resLevel->x1 = jpxCeilDivPow2(tileComp->x1, k); | |
1682 | resLevel->y1 = jpxCeilDivPow2(tileComp->y1, k); | |
1683 | if (r == 0) { | |
1684 | resLevel->bx0[0] = resLevel->x0; | |
1685 | resLevel->by0[0] = resLevel->y0; | |
1686 | resLevel->bx1[0] = resLevel->x1; | |
1687 | resLevel->by1[0] = resLevel->y1; | |
1688 | } else { | |
1689 | resLevel->bx0[0] = jpxCeilDivPow2(tileComp->x0 - (1 << (k-1)), k); | |
1690 | resLevel->by0[0] = resLevel->y0; | |
1691 | resLevel->bx1[0] = jpxCeilDivPow2(tileComp->x1 - (1 << (k-1)), k); | |
1692 | resLevel->by1[0] = resLevel->y1; | |
1693 | resLevel->bx0[1] = resLevel->x0; | |
1694 | resLevel->by0[1] = jpxCeilDivPow2(tileComp->y0 - (1 << (k-1)), k); | |
1695 | resLevel->bx1[1] = resLevel->x1; | |
1696 | resLevel->by1[1] = jpxCeilDivPow2(tileComp->y1 - (1 << (k-1)), k); | |
1697 | resLevel->bx0[2] = jpxCeilDivPow2(tileComp->x0 - (1 << (k-1)), k); | |
1698 | resLevel->by0[2] = jpxCeilDivPow2(tileComp->y0 - (1 << (k-1)), k); | |
1699 | resLevel->bx1[2] = jpxCeilDivPow2(tileComp->x1 - (1 << (k-1)), k); | |
1700 | resLevel->by1[2] = jpxCeilDivPow2(tileComp->y1 - (1 << (k-1)), k); | |
1701 | } | |
1702 | resLevel->precincts = (JPXPrecinct *)gmallocn(1, sizeof(JPXPrecinct)); | |
1703 | for (pre = 0; pre < 1; ++pre) { | |
1704 | precinct = &resLevel->precincts[pre]; | |
1705 | precinct->x0 = resLevel->x0; | |
1706 | precinct->y0 = resLevel->y0; | |
1707 | precinct->x1 = resLevel->x1; | |
1708 | precinct->y1 = resLevel->y1; | |
1709 | nSBs = r == 0 ? 1 : 3; | |
1710 | precinct->subbands = | |
1711 | (JPXSubband *)gmallocn(nSBs, sizeof(JPXSubband)); | |
1712 | for (sb = 0; sb < nSBs; ++sb) { | |
1713 | subband = &precinct->subbands[sb]; | |
1714 | subband->x0 = resLevel->bx0[sb]; | |
1715 | subband->y0 = resLevel->by0[sb]; | |
1716 | subband->x1 = resLevel->bx1[sb]; | |
1717 | subband->y1 = resLevel->by1[sb]; | |
1718 | subband->nXCBs = jpxCeilDivPow2(subband->x1, | |
1719 | tileComp->codeBlockW) | |
1720 | - jpxFloorDivPow2(subband->x0, | |
1721 | tileComp->codeBlockW); | |
1722 | subband->nYCBs = jpxCeilDivPow2(subband->y1, | |
1723 | tileComp->codeBlockH) | |
1724 | - jpxFloorDivPow2(subband->y0, | |
1725 | tileComp->codeBlockH); | |
1726 | n = subband->nXCBs > subband->nYCBs ? subband->nXCBs | |
1727 | : subband->nYCBs; | |
1728 | for (subband->maxTTLevel = 0, --n; | |
1729 | n; | |
1730 | ++subband->maxTTLevel, n >>= 1) ; | |
1731 | n = 0; | |
1732 | for (level = subband->maxTTLevel; level >= 0; --level) { | |
1733 | nx = jpxCeilDivPow2(subband->nXCBs, level); | |
1734 | ny = jpxCeilDivPow2(subband->nYCBs, level); | |
1735 | n += nx * ny; | |
1736 | } | |
1737 | subband->inclusion = | |
1738 | (JPXTagTreeNode *)gmallocn(n, sizeof(JPXTagTreeNode)); | |
1739 | subband->zeroBitPlane = | |
1740 | (JPXTagTreeNode *)gmallocn(n, sizeof(JPXTagTreeNode)); | |
1741 | for (k = 0; k < n; ++k) { | |
1742 | subband->inclusion[k].finished = gFalse; | |
1743 | subband->inclusion[k].val = 0; | |
1744 | subband->zeroBitPlane[k].finished = gFalse; | |
1745 | subband->zeroBitPlane[k].val = 0; | |
1746 | } | |
1747 | subband->cbs = (JPXCodeBlock *)gmallocn(subband->nXCBs * | |
1748 | subband->nYCBs, | |
1749 | sizeof(JPXCodeBlock)); | |
1750 | sbx0 = jpxFloorDivPow2(subband->x0, tileComp->codeBlockW); | |
1751 | sby0 = jpxFloorDivPow2(subband->y0, tileComp->codeBlockH); | |
1752 | cb = subband->cbs; | |
1753 | for (cbY = 0; cbY < subband->nYCBs; ++cbY) { | |
1754 | for (cbX = 0; cbX < subband->nXCBs; ++cbX) { | |
1755 | cb->x0 = (sbx0 + cbX) << tileComp->codeBlockW; | |
1756 | cb->x1 = cb->x0 + tileComp->cbW; | |
1757 | if (subband->x0 > cb->x0) { | |
1758 | cb->x0 = subband->x0; | |
1759 | } | |
1760 | if (subband->x1 < cb->x1) { | |
1761 | cb->x1 = subband->x1; | |
1762 | } | |
1763 | cb->y0 = (sby0 + cbY) << tileComp->codeBlockH; | |
1764 | cb->y1 = cb->y0 + tileComp->cbH; | |
1765 | if (subband->y0 > cb->y0) { | |
1766 | cb->y0 = subband->y0; | |
1767 | } | |
1768 | if (subband->y1 < cb->y1) { | |
1769 | cb->y1 = subband->y1; | |
1770 | } | |
1771 | cb->seen = gFalse; | |
1772 | cb->lBlock = 3; | |
1773 | cb->nextPass = jpxPassCleanup; | |
1774 | cb->nZeroBitPlanes = 0; | |
1775 | cb->coeffs = | |
1776 | (JPXCoeff *)gmallocn((1 << (tileComp->codeBlockW | |
1777 | + tileComp->codeBlockH)), | |
1778 | sizeof(JPXCoeff)); | |
1779 | for (cbi = 0; | |
1780 | cbi < (Guint)(1 << (tileComp->codeBlockW | |
1781 | + tileComp->codeBlockH)); | |
1782 | ++cbi) { | |
1783 | cb->coeffs[cbi].flags = 0; | |
1784 | cb->coeffs[cbi].len = 0; | |
1785 | cb->coeffs[cbi].mag = 0; | |
1786 | } | |
1787 | cb->arithDecoder = NULL; | |
1788 | cb->stats = NULL; | |
1789 | ++cb; | |
1790 | } | |
1791 | } | |
1792 | } | |
1793 | } | |
1794 | } | |
1795 | } | |
1796 | } | |
1797 | ||
1798 | return readTilePartData(tileIdx, tilePartLen, tilePartToEOC); | |
1799 | } | |
1800 | ||
1801 | GBool JPXStream::readTilePartData(Guint tileIdx, | |
1802 | Guint tilePartLen, GBool tilePartToEOC) { | |
1803 | JPXTile *tile; | |
1804 | JPXTileComp *tileComp; | |
1805 | JPXResLevel *resLevel; | |
1806 | JPXPrecinct *precinct; | |
1807 | JPXSubband *subband; | |
1808 | JPXCodeBlock *cb; | |
1809 | Guint ttVal; | |
1810 | Guint bits, cbX, cbY, nx, ny, i, j, n, sb; | |
1811 | int level; | |
1812 | ||
1813 | tile = &img.tiles[tileIdx]; | |
1814 | ||
1815 | // read all packets from this tile-part | |
1816 | while (1) { | |
1817 | if (tilePartToEOC) { | |
1818 | //~ peek for an EOC marker | |
1819 | } else if (tilePartLen == 0) { | |
1820 | break; | |
1821 | } | |
1822 | ||
1823 | tileComp = &tile->tileComps[tile->comp]; | |
1824 | resLevel = &tileComp->resLevels[tile->res]; | |
1825 | precinct = &resLevel->precincts[tile->precinct]; | |
1826 | ||
1827 | //----- packet header | |
1828 | ||
1829 | // zero-length flag | |
1830 | if (!readBits(1, &bits)) { | |
1831 | goto err; | |
1832 | } | |
1833 | if (!bits) { | |
1834 | // packet is empty -- clear all code-block inclusion flags | |
1835 | for (sb = 0; sb < (tile->res == 0 ? 1 : 3); ++sb) { | |
1836 | subband = &precinct->subbands[sb]; | |
1837 | for (cbY = 0; cbY < subband->nYCBs; ++cbY) { | |
1838 | for (cbX = 0; cbX < subband->nXCBs; ++cbX) { | |
1839 | cb = &subband->cbs[cbY * subband->nXCBs + cbX]; | |
1840 | cb->included = gFalse; | |
1841 | } | |
1842 | } | |
1843 | } | |
1844 | } else { | |
1845 | ||
1846 | for (sb = 0; sb < (tile->res == 0 ? 1 : 3); ++sb) { | |
1847 | subband = &precinct->subbands[sb]; | |
1848 | for (cbY = 0; cbY < subband->nYCBs; ++cbY) { | |
1849 | for (cbX = 0; cbX < subband->nXCBs; ++cbX) { | |
1850 | cb = &subband->cbs[cbY * subband->nXCBs + cbX]; | |
1851 | ||
1852 | // skip code-blocks with no coefficients | |
1853 | if (cb->x0 >= cb->x1 || cb->y0 >= cb->y1) { | |
1854 | cb->included = gFalse; | |
1855 | continue; | |
1856 | } | |
1857 | ||
1858 | // code-block inclusion | |
1859 | if (cb->seen) { | |
1860 | if (!readBits(1, &cb->included)) { | |
1861 | goto err; | |
1862 | } | |
1863 | } else { | |
1864 | ttVal = 0; | |
1865 | i = 0; | |
1866 | for (level = subband->maxTTLevel; level >= 0; --level) { | |
1867 | nx = jpxCeilDivPow2(subband->nXCBs, level); | |
1868 | ny = jpxCeilDivPow2(subband->nYCBs, level); | |
1869 | j = i + (cbY >> level) * nx + (cbX >> level); | |
1870 | if (!subband->inclusion[j].finished && | |
1871 | !subband->inclusion[j].val) { | |
1872 | subband->inclusion[j].val = ttVal; | |
1873 | } else { | |
1874 | ttVal = subband->inclusion[j].val; | |
1875 | } | |
1876 | while (!subband->inclusion[j].finished && | |
1877 | ttVal <= tile->layer) { | |
1878 | if (!readBits(1, &bits)) { | |
1879 | goto err; | |
1880 | } | |
1881 | if (bits == 1) { | |
1882 | subband->inclusion[j].finished = gTrue; | |
1883 | } else { | |
1884 | ++ttVal; | |
1885 | } | |
1886 | } | |
1887 | subband->inclusion[j].val = ttVal; | |
1888 | if (ttVal > tile->layer) { | |
1889 | break; | |
1890 | } | |
1891 | i += nx * ny; | |
1892 | } | |
1893 | cb->included = level < 0; | |
1894 | } | |
1895 | ||
1896 | if (cb->included) { | |
1897 | ||
1898 | // zero bit-plane count | |
1899 | if (!cb->seen) { | |
1900 | ttVal = 0; | |
1901 | i = 0; | |
1902 | for (level = subband->maxTTLevel; level >= 0; --level) { | |
1903 | nx = jpxCeilDivPow2(subband->nXCBs, level); | |
1904 | ny = jpxCeilDivPow2(subband->nYCBs, level); | |
1905 | j = i + (cbY >> level) * nx + (cbX >> level); | |
1906 | if (!subband->zeroBitPlane[j].finished && | |
1907 | !subband->zeroBitPlane[j].val) { | |
1908 | subband->zeroBitPlane[j].val = ttVal; | |
1909 | } else { | |
1910 | ttVal = subband->zeroBitPlane[j].val; | |
1911 | } | |
1912 | while (!subband->zeroBitPlane[j].finished) { | |
1913 | if (!readBits(1, &bits)) { | |
1914 | goto err; | |
1915 | } | |
1916 | if (bits == 1) { | |
1917 | subband->zeroBitPlane[j].finished = gTrue; | |
1918 | } else { | |
1919 | ++ttVal; | |
1920 | } | |
1921 | } | |
1922 | subband->zeroBitPlane[j].val = ttVal; | |
1923 | i += nx * ny; | |
1924 | } | |
1925 | cb->nZeroBitPlanes = ttVal; | |
1926 | } | |
1927 | ||
1928 | // number of coding passes | |
1929 | if (!readBits(1, &bits)) { | |
1930 | goto err; | |
1931 | } | |
1932 | if (bits == 0) { | |
1933 | cb->nCodingPasses = 1; | |
1934 | } else { | |
1935 | if (!readBits(1, &bits)) { | |
1936 | goto err; | |
1937 | } | |
1938 | if (bits == 0) { | |
1939 | cb->nCodingPasses = 2; | |
1940 | } else { | |
1941 | if (!readBits(2, &bits)) { | |
1942 | goto err; | |
1943 | } | |
1944 | if (bits < 3) { | |
1945 | cb->nCodingPasses = 3 + bits; | |
1946 | } else { | |
1947 | if (!readBits(5, &bits)) { | |
1948 | goto err; | |
1949 | } | |
1950 | if (bits < 31) { | |
1951 | cb->nCodingPasses = 6 + bits; | |
1952 | } else { | |
1953 | if (!readBits(7, &bits)) { | |
1954 | goto err; | |
1955 | } | |
1956 | cb->nCodingPasses = 37 + bits; | |
1957 | } | |
1958 | } | |
1959 | } | |
1960 | } | |
1961 | ||
1962 | // update Lblock | |
1963 | while (1) { | |
1964 | if (!readBits(1, &bits)) { | |
1965 | goto err; | |
1966 | } | |
1967 | if (!bits) { | |
1968 | break; | |
1969 | } | |
1970 | ++cb->lBlock; | |
1971 | } | |
1972 | ||
1973 | // length of compressed data | |
1974 | //~ deal with multiple codeword segments | |
1975 | for (n = cb->lBlock, i = cb->nCodingPasses >> 1; | |
1976 | i; | |
1977 | ++n, i >>= 1) ; | |
1978 | if (!readBits(n, &cb->dataLen)) { | |
1979 | goto err; | |
1980 | } | |
1981 | } | |
1982 | } | |
1983 | } | |
1984 | } | |
1985 | } | |
1986 | tilePartLen -= byteCount; | |
1987 | clearBitBuf(); | |
1988 | ||
1989 | //----- packet data | |
1990 | ||
1991 | for (sb = 0; sb < (tile->res == 0 ? 1 : 3); ++sb) { | |
1992 | subband = &precinct->subbands[sb]; | |
1993 | for (cbY = 0; cbY < subband->nYCBs; ++cbY) { | |
1994 | for (cbX = 0; cbX < subband->nXCBs; ++cbX) { | |
1995 | cb = &subband->cbs[cbY * subband->nXCBs + cbX]; | |
1996 | if (cb->included) { | |
1997 | if (!readCodeBlockData(tileComp, resLevel, precinct, subband, | |
1998 | tile->res, sb, cb)) { | |
1999 | return gFalse; | |
2000 | } | |
2001 | tilePartLen -= cb->dataLen; | |
2002 | cb->seen = gTrue; | |
2003 | } | |
2004 | } | |
2005 | } | |
2006 | } | |
2007 | ||
2008 | //----- next packet | |
2009 | ||
2010 | switch (tile->progOrder) { | |
2011 | case 0: // layer, resolution level, component, precinct | |
2012 | if (++tile->comp == img.nComps) { | |
2013 | tile->comp = 0; | |
2014 | if (++tile->res == tile->maxNDecompLevels + 1) { | |
2015 | tile->res = 0; | |
2016 | if (++tile->layer == tile->nLayers) { | |
2017 | tile->layer = 0; | |
2018 | } | |
2019 | } | |
2020 | } | |
2021 | break; | |
2022 | case 1: // resolution level, layer, component, precinct | |
2023 | if (++tile->comp == img.nComps) { | |
2024 | tile->comp = 0; | |
2025 | if (++tile->layer == tile->nLayers) { | |
2026 | tile->layer = 0; | |
2027 | if (++tile->res == tile->maxNDecompLevels + 1) { | |
2028 | tile->res = 0; | |
2029 | } | |
2030 | } | |
2031 | } | |
2032 | break; | |
2033 | case 2: // resolution level, precinct, component, layer | |
2034 | //~ this isn't correct -- see B.12.1.3 | |
2035 | if (++tile->layer == tile->nLayers) { | |
2036 | tile->layer = 0; | |
2037 | if (++tile->comp == img.nComps) { | |
2038 | tile->comp = 0; | |
2039 | if (++tile->res == tile->maxNDecompLevels + 1) { | |
2040 | tile->res = 0; | |
2041 | } | |
2042 | } | |
2043 | } | |
2044 | break; | |
2045 | case 3: // precinct, component, resolution level, layer | |
2046 | //~ this isn't correct -- see B.12.1.4 | |
2047 | if (++tile->layer == tile->nLayers) { | |
2048 | tile->layer = 0; | |
2049 | if (++tile->res == tile->maxNDecompLevels + 1) { | |
2050 | tile->res = 0; | |
2051 | if (++tile->comp == img.nComps) { | |
2052 | tile->comp = 0; | |
2053 | } | |
2054 | } | |
2055 | } | |
2056 | break; | |
2057 | case 4: // component, precinct, resolution level, layer | |
2058 | //~ this isn't correct -- see B.12.1.5 | |
2059 | if (++tile->layer == tile->nLayers) { | |
2060 | tile->layer = 0; | |
2061 | if (++tile->res == tile->maxNDecompLevels + 1) { | |
2062 | tile->res = 0; | |
2063 | if (++tile->comp == img.nComps) { | |
2064 | tile->comp = 0; | |
2065 | } | |
2066 | } | |
2067 | } | |
2068 | break; | |
2069 | } | |
2070 | } | |
2071 | ||
2072 | return gTrue; | |
2073 | ||
2074 | err: | |
2075 | error(getPos(), "Error in JPX stream"); | |
2076 | return gFalse; | |
2077 | } | |
2078 | ||
2079 | GBool JPXStream::readCodeBlockData(JPXTileComp *tileComp, | |
2080 | JPXResLevel *resLevel, | |
2081 | JPXPrecinct *precinct, | |
2082 | JPXSubband *subband, | |
2083 | Guint res, Guint sb, | |
2084 | JPXCodeBlock *cb) { | |
2085 | JPXCoeff *coeff0, *coeff1, *coeff; | |
2086 | Guint horiz, vert, diag, all, cx, xorBit; | |
2087 | int horizSign, vertSign; | |
2088 | Guint i, x, y0, y1, y2; | |
2089 | ||
2090 | if (cb->arithDecoder) { | |
2091 | cb->arithDecoder->restart(cb->dataLen); | |
2092 | } else { | |
2093 | cb->arithDecoder = new JArithmeticDecoder(); | |
2094 | cb->arithDecoder->setStream(str, cb->dataLen); | |
2095 | cb->arithDecoder->start(); | |
2096 | cb->stats = new JArithmeticDecoderStats(jpxNContexts); | |
2097 | cb->stats->setEntry(jpxContextSigProp, 4, 0); | |
2098 | cb->stats->setEntry(jpxContextRunLength, 3, 0); | |
2099 | cb->stats->setEntry(jpxContextUniform, 46, 0); | |
2100 | } | |
2101 | ||
2102 | for (i = 0; i < cb->nCodingPasses; ++i) { | |
2103 | switch (cb->nextPass) { | |
2104 | ||
2105 | //----- significance propagation pass | |
2106 | case jpxPassSigProp: | |
2107 | for (y0 = cb->y0, coeff0 = cb->coeffs; | |
2108 | y0 < cb->y1; | |
2109 | y0 += 4, coeff0 += 4 << tileComp->codeBlockW) { | |
2110 | for (x = cb->x0, coeff1 = coeff0; | |
2111 | x < cb->x1; | |
2112 | ++x, ++coeff1) { | |
2113 | for (y1 = 0, coeff = coeff1; | |
2114 | y1 < 4 && y0+y1 < cb->y1; | |
2115 | ++y1, coeff += tileComp->cbW) { | |
2116 | if (!(coeff->flags & jpxCoeffSignificant)) { | |
2117 | horiz = vert = diag = 0; | |
2118 | horizSign = vertSign = 2; | |
2119 | if (x > cb->x0) { | |
2120 | if (coeff[-1].flags & jpxCoeffSignificant) { | |
2121 | ++horiz; | |
2122 | horizSign += (coeff[-1].flags & jpxCoeffSign) ? -1 : 1; | |
2123 | } | |
2124 | if (y0+y1 > cb->y0) { | |
2125 | diag += (coeff[-(int)tileComp->cbW - 1].flags | |
2126 | >> jpxCoeffSignificantB) & 1; | |
2127 | } | |
2128 | if (y0+y1 < cb->y1 - 1) { | |
2129 | diag += (coeff[tileComp->cbW - 1].flags | |
2130 | >> jpxCoeffSignificantB) & 1; | |
2131 | } | |
2132 | } | |
2133 | if (x < cb->x1 - 1) { | |
2134 | if (coeff[1].flags & jpxCoeffSignificant) { | |
2135 | ++horiz; | |
2136 | horizSign += (coeff[1].flags & jpxCoeffSign) ? -1 : 1; | |
2137 | } | |
2138 | if (y0+y1 > cb->y0) { | |
2139 | diag += (coeff[-(int)tileComp->cbW + 1].flags | |
2140 | >> jpxCoeffSignificantB) & 1; | |
2141 | } | |
2142 | if (y0+y1 < cb->y1 - 1) { | |
2143 | diag += (coeff[tileComp->cbW + 1].flags | |
2144 | >> jpxCoeffSignificantB) & 1; | |
2145 | } | |
2146 | } | |
2147 | if (y0+y1 > cb->y0) { | |
2148 | if (coeff[-(int)tileComp->cbW].flags & jpxCoeffSignificant) { | |
2149 | ++vert; | |
2150 | vertSign += (coeff[-(int)tileComp->cbW].flags & jpxCoeffSign) | |
2151 | ? -1 : 1; | |
2152 | } | |
2153 | } | |
2154 | if (y0+y1 < cb->y1 - 1) { | |
2155 | if (coeff[tileComp->cbW].flags & jpxCoeffSignificant) { | |
2156 | ++vert; | |
2157 | vertSign += (coeff[tileComp->cbW].flags & jpxCoeffSign) | |
2158 | ? -1 : 1; | |
2159 | } | |
2160 | } | |
2161 | cx = sigPropContext[horiz][vert][diag][res == 0 ? 1 : sb]; | |
2162 | if (cx != 0) { | |
2163 | if (cb->arithDecoder->decodeBit(cx, cb->stats)) { | |
2164 | coeff->flags |= jpxCoeffSignificant | jpxCoeffFirstMagRef; | |
2165 | coeff->mag = (coeff->mag << 1) | 1; | |
2166 | cx = signContext[horizSign][vertSign][0]; | |
2167 | xorBit = signContext[horizSign][vertSign][1]; | |
2168 | if (cb->arithDecoder->decodeBit(cx, cb->stats) ^ xorBit) { | |
2169 | coeff->flags |= jpxCoeffSign; | |
2170 | } | |
2171 | } | |
2172 | ++coeff->len; | |
2173 | coeff->flags |= jpxCoeffTouched; | |
2174 | } | |
2175 | } | |
2176 | } | |
2177 | } | |
2178 | } | |
2179 | ++cb->nextPass; | |
2180 | break; | |
2181 | ||
2182 | //----- magnitude refinement pass | |
2183 | case jpxPassMagRef: | |
2184 | for (y0 = cb->y0, coeff0 = cb->coeffs; | |
2185 | y0 < cb->y1; | |
2186 | y0 += 4, coeff0 += 4 << tileComp->codeBlockW) { | |
2187 | for (x = cb->x0, coeff1 = coeff0; | |
2188 | x < cb->x1; | |
2189 | ++x, ++coeff1) { | |
2190 | for (y1 = 0, coeff = coeff1; | |
2191 | y1 < 4 && y0+y1 < cb->y1; | |
2192 | ++y1, coeff += tileComp->cbW) { | |
2193 | if ((coeff->flags & jpxCoeffSignificant) && | |
2194 | !(coeff->flags & jpxCoeffTouched)) { | |
2195 | if (coeff->flags & jpxCoeffFirstMagRef) { | |
2196 | all = 0; | |
2197 | if (x > cb->x0) { | |
2198 | all += (coeff[-1].flags >> jpxCoeffSignificantB) & 1; | |
2199 | if (y0+y1 > cb->y0) { | |
2200 | all += (coeff[-(int)tileComp->cbW - 1].flags | |
2201 | >> jpxCoeffSignificantB) & 1; | |
2202 | } | |
2203 | if (y0+y1 < cb->y1 - 1) { | |
2204 | all += (coeff[tileComp->cbW - 1].flags | |
2205 | >> jpxCoeffSignificantB) & 1; | |
2206 | } | |
2207 | } | |
2208 | if (x < cb->x1 - 1) { | |
2209 | all += (coeff[1].flags >> jpxCoeffSignificantB) & 1; | |
2210 | if (y0+y1 > cb->y0) { | |
2211 | all += (coeff[-(int)tileComp->cbW + 1].flags | |
2212 | >> jpxCoeffSignificantB) & 1; | |
2213 | } | |
2214 | if (y0+y1 < cb->y1 - 1) { | |
2215 | all += (coeff[tileComp->cbW + 1].flags | |
2216 | >> jpxCoeffSignificantB) & 1; | |
2217 | } | |
2218 | } | |
2219 | if (y0+y1 > cb->y0) { | |
2220 | all += (coeff[-(int)tileComp->cbW].flags | |
2221 | >> jpxCoeffSignificantB) & 1; | |
2222 | } | |
2223 | if (y0+y1 < cb->y1 - 1) { | |
2224 | all += (coeff[tileComp->cbW].flags | |
2225 | >> jpxCoeffSignificantB) & 1; | |
2226 | } | |
2227 | cx = all ? 15 : 14; | |
2228 | } else { | |
2229 | cx = 16; | |
2230 | } | |
2231 | coeff->mag = (coeff->mag << 1) | | |
2232 | cb->arithDecoder->decodeBit(cx, cb->stats); | |
2233 | ++coeff->len; | |
2234 | coeff->flags |= jpxCoeffTouched; | |
2235 | coeff->flags &= ~jpxCoeffFirstMagRef; | |
2236 | } | |
2237 | } | |
2238 | } | |
2239 | } | |
2240 | ++cb->nextPass; | |
2241 | break; | |
2242 | ||
2243 | //----- cleanup pass | |
2244 | case jpxPassCleanup: | |
2245 | for (y0 = cb->y0, coeff0 = cb->coeffs; | |
2246 | y0 < cb->y1; | |
2247 | y0 += 4, coeff0 += 4 << tileComp->codeBlockW) { | |
2248 | for (x = cb->x0, coeff1 = coeff0; | |
2249 | x < cb->x1; | |
2250 | ++x, ++coeff1) { | |
2251 | y1 = 0; | |
2252 | if (y0 + 3 < cb->y1 && | |
2253 | !(coeff1->flags & jpxCoeffTouched) && | |
2254 | !(coeff1[tileComp->cbW].flags & jpxCoeffTouched) && | |
2255 | !(coeff1[2 * tileComp->cbW].flags & jpxCoeffTouched) && | |
2256 | !(coeff1[3 * tileComp->cbW].flags & jpxCoeffTouched) && | |
2257 | (x == cb->x0 || y0 == cb->y0 || | |
2258 | !(coeff1[-(int)tileComp->cbW - 1].flags | |
2259 | & jpxCoeffSignificant)) && | |
2260 | (y0 == cb->y0 || | |
2261 | !(coeff1[-(int)tileComp->cbW].flags | |
2262 | & jpxCoeffSignificant)) && | |
2263 | (x == cb->x1 - 1 || y0 == cb->y0 || | |
2264 | !(coeff1[-(int)tileComp->cbW + 1].flags | |
2265 | & jpxCoeffSignificant)) && | |
2266 | (x == cb->x0 || | |
2267 | (!(coeff1[-1].flags & jpxCoeffSignificant) && | |
2268 | !(coeff1[tileComp->cbW - 1].flags | |
2269 | & jpxCoeffSignificant) && | |
2270 | !(coeff1[2 * tileComp->cbW - 1].flags | |
2271 | & jpxCoeffSignificant) && | |
2272 | !(coeff1[3 * tileComp->cbW - 1].flags | |
2273 | & jpxCoeffSignificant))) && | |
2274 | (x == cb->x1 - 1 || | |
2275 | (!(coeff1[1].flags & jpxCoeffSignificant) && | |
2276 | !(coeff1[tileComp->cbW + 1].flags | |
2277 | & jpxCoeffSignificant) && | |
2278 | !(coeff1[2 * tileComp->cbW + 1].flags | |
2279 | & jpxCoeffSignificant) && | |
2280 | !(coeff1[3 * tileComp->cbW + 1].flags | |
2281 | & jpxCoeffSignificant))) && | |
2282 | (x == cb->x0 || y0+4 == cb->y1 || | |
2283 | !(coeff1[4 * tileComp->cbW - 1].flags & jpxCoeffSignificant)) && | |
2284 | (y0+4 == cb->y1 || | |
2285 | !(coeff1[4 * tileComp->cbW].flags & jpxCoeffSignificant)) && | |
2286 | (x == cb->x1 - 1 || y0+4 == cb->y1 || | |
2287 | !(coeff1[4 * tileComp->cbW + 1].flags | |
2288 | & jpxCoeffSignificant))) { | |
2289 | if (cb->arithDecoder->decodeBit(jpxContextRunLength, cb->stats)) { | |
2290 | y1 = cb->arithDecoder->decodeBit(jpxContextUniform, cb->stats); | |
2291 | y1 = (y1 << 1) | | |
2292 | cb->arithDecoder->decodeBit(jpxContextUniform, cb->stats); | |
2293 | for (y2 = 0, coeff = coeff1; | |
2294 | y2 < y1; | |
2295 | ++y2, coeff += tileComp->cbW) { | |
2296 | ++coeff->len; | |
2297 | } | |
2298 | coeff->flags |= jpxCoeffSignificant | jpxCoeffFirstMagRef; | |
2299 | coeff->mag = (coeff->mag << 1) | 1; | |
2300 | ++coeff->len; | |
2301 | cx = signContext[2][2][0]; | |
2302 | xorBit = signContext[2][2][1]; | |
2303 | if (cb->arithDecoder->decodeBit(cx, cb->stats) ^ xorBit) { | |
2304 | coeff->flags |= jpxCoeffSign; | |
2305 | } | |
2306 | ++y1; | |
2307 | } else { | |
2308 | for (y1 = 0, coeff = coeff1; | |
2309 | y1 < 4; | |
2310 | ++y1, coeff += tileComp->cbW) { | |
2311 | ++coeff->len; | |
2312 | } | |
2313 | y1 = 4; | |
2314 | } | |
2315 | } | |
2316 | for (coeff = &coeff1[y1 << tileComp->codeBlockW]; | |
2317 | y1 < 4 && y0 + y1 < cb->y1; | |
2318 | ++y1, coeff += tileComp->cbW) { | |
2319 | if (!(coeff->flags & jpxCoeffTouched)) { | |
2320 | horiz = vert = diag = 0; | |
2321 | horizSign = vertSign = 2; | |
2322 | if (x > cb->x0) { | |
2323 | if (coeff[-1].flags & jpxCoeffSignificant) { | |
2324 | ++horiz; | |
2325 | horizSign += (coeff[-1].flags & jpxCoeffSign) ? -1 : 1; | |
2326 | } | |
2327 | if (y0+y1 > cb->y0) { | |
2328 | diag += (coeff[-(int)tileComp->cbW - 1].flags | |
2329 | >> jpxCoeffSignificantB) & 1; | |
2330 | } | |
2331 | if (y0+y1 < cb->y1 - 1) { | |
2332 | diag += (coeff[tileComp->cbW - 1].flags | |
2333 | >> jpxCoeffSignificantB) & 1; | |
2334 | } | |
2335 | } | |
2336 | if (x < cb->x1 - 1) { | |
2337 | if (coeff[1].flags & jpxCoeffSignificant) { | |
2338 | ++horiz; | |
2339 | horizSign += (coeff[1].flags & jpxCoeffSign) ? -1 : 1; | |
2340 | } | |
2341 | if (y0+y1 > cb->y0) { | |
2342 | diag += (coeff[-(int)tileComp->cbW + 1].flags | |
2343 | >> jpxCoeffSignificantB) & 1; | |
2344 | } | |
2345 | if (y0+y1 < cb->y1 - 1) { | |
2346 | diag += (coeff[tileComp->cbW + 1].flags | |
2347 | >> jpxCoeffSignificantB) & 1; | |
2348 | } | |
2349 | } | |
2350 | if (y0+y1 > cb->y0) { | |
2351 | if (coeff[-(int)tileComp->cbW].flags & jpxCoeffSignificant) { | |
2352 | ++vert; | |
2353 | vertSign += (coeff[-(int)tileComp->cbW].flags & jpxCoeffSign) | |
2354 | ? -1 : 1; | |
2355 | } | |
2356 | } | |
2357 | if (y0+y1 < cb->y1 - 1) { | |
2358 | if (coeff[tileComp->cbW].flags & jpxCoeffSignificant) { | |
2359 | ++vert; | |
2360 | vertSign += (coeff[tileComp->cbW].flags & jpxCoeffSign) | |
2361 | ? -1 : 1; | |
2362 | } | |
2363 | } | |
2364 | cx = sigPropContext[horiz][vert][diag][res == 0 ? 1 : sb]; | |
2365 | if (cb->arithDecoder->decodeBit(cx, cb->stats)) { | |
2366 | coeff->flags |= jpxCoeffSignificant | jpxCoeffFirstMagRef; | |
2367 | coeff->mag = (coeff->mag << 1) | 1; | |
2368 | cx = signContext[horizSign][vertSign][0]; | |
2369 | xorBit = signContext[horizSign][vertSign][1]; | |
2370 | if (cb->arithDecoder->decodeBit(cx, cb->stats) ^ xorBit) { | |
2371 | coeff->flags |= jpxCoeffSign; | |
2372 | } | |
2373 | } | |
2374 | ++coeff->len; | |
2375 | } else { | |
2376 | coeff->flags &= ~jpxCoeffTouched; | |
2377 | } | |
2378 | } | |
2379 | } | |
2380 | } | |
2381 | cb->nextPass = jpxPassSigProp; | |
2382 | break; | |
2383 | } | |
2384 | } | |
2385 | ||
2386 | cb->arithDecoder->cleanup(); | |
2387 | return gTrue; | |
2388 | } | |
2389 | ||
2390 | // Inverse quantization, and wavelet transform (IDWT). This also does | |
2391 | // the initial shift to convert to fixed point format. | |
2392 | void JPXStream::inverseTransform(JPXTileComp *tileComp) { | |
2393 | JPXResLevel *resLevel; | |
2394 | JPXPrecinct *precinct; | |
2395 | JPXSubband *subband; | |
2396 | JPXCodeBlock *cb; | |
2397 | JPXCoeff *coeff0, *coeff; | |
2398 | Guint qStyle, guard, eps, shift; | |
2399 | int shift2; | |
2400 | double mu; | |
2401 | int val; | |
2402 | int *dataPtr; | |
2403 | Guint nx0, ny0, nx1, ny1; | |
2404 | Guint r, cbX, cbY, x, y; | |
2405 | ||
2406 | //----- (NL)LL subband (resolution level 0) | |
2407 | ||
2408 | resLevel = &tileComp->resLevels[0]; | |
2409 | precinct = &resLevel->precincts[0]; | |
2410 | subband = &precinct->subbands[0]; | |
2411 | ||
2412 | // i-quant parameters | |
2413 | qStyle = tileComp->quantStyle & 0x1f; | |
2414 | guard = (tileComp->quantStyle >> 5) & 7; | |
2415 | if (qStyle == 0) { | |
2416 | eps = (tileComp->quantSteps[0] >> 3) & 0x1f; | |
2417 | shift = guard + eps - 1; | |
2418 | mu = 0; // make gcc happy | |
2419 | } else { | |
2420 | shift = guard - 1 + tileComp->prec; | |
2421 | mu = (double)(0x800 + (tileComp->quantSteps[0] & 0x7ff)) / 2048.0; | |
2422 | } | |
2423 | if (tileComp->transform == 0) { | |
2424 | shift += fracBits; | |
2425 | } | |
2426 | ||
2427 | // copy (NL)LL into the upper-left corner of the data array, doing | |
2428 | // the fixed point adjustment and dequantization along the way | |
2429 | cb = subband->cbs; | |
2430 | for (cbY = 0; cbY < subband->nYCBs; ++cbY) { | |
2431 | for (cbX = 0; cbX < subband->nXCBs; ++cbX) { | |
2432 | for (y = cb->y0, coeff0 = cb->coeffs; | |
2433 | y < cb->y1; | |
2434 | ++y, coeff0 += tileComp->cbW) { | |
2435 | dataPtr = &tileComp->data[(y - subband->y0) | |
2436 | * (tileComp->x1 - tileComp->x0) | |
2437 | + (cb->x0 - subband->x0)]; | |
2438 | for (x = cb->x0, coeff = coeff0; x < cb->x1; ++x, ++coeff) { | |
2439 | val = (int)coeff->mag; | |
2440 | if (val != 0) { | |
2441 | shift2 = shift - (cb->nZeroBitPlanes + coeff->len); | |
2442 | if (shift2 > 0) { | |
2443 | val = (val << shift2) + (1 << (shift2 - 1)); | |
2444 | } else { | |
2445 | val >>= -shift2; | |
2446 | } | |
2447 | if (qStyle == 0) { | |
2448 | if (tileComp->transform == 0) { | |
2449 | val &= -1 << fracBits; | |
2450 | } | |
2451 | } else { | |
2452 | val = (int)((double)val * mu); | |
2453 | } | |
2454 | if (coeff->flags & jpxCoeffSign) { | |
2455 | val = -val; | |
2456 | } | |
2457 | } | |
2458 | *dataPtr++ = val; | |
2459 | } | |
2460 | } | |
2461 | ++cb; | |
2462 | } | |
2463 | } | |
2464 | ||
2465 | //----- IDWT for each level | |
2466 | ||
2467 | for (r = 1; r <= tileComp->nDecompLevels; ++r) { | |
2468 | resLevel = &tileComp->resLevels[r]; | |
2469 | ||
2470 | // (n)LL is already in the upper-left corner of the | |
2471 | // tile-component data array -- interleave with (n)HL/LH/HH | |
2472 | // and inverse transform to get (n-1)LL, which will be stored | |
2473 | // in the upper-left corner of the tile-component data array | |
2474 | if (r == tileComp->nDecompLevels) { | |
2475 | nx0 = tileComp->x0; | |
2476 | ny0 = tileComp->y0; | |
2477 | nx1 = tileComp->x1; | |
2478 | ny1 = tileComp->y1; | |
2479 | } else { | |
2480 | nx0 = tileComp->resLevels[r+1].x0; | |
2481 | ny0 = tileComp->resLevels[r+1].y0; | |
2482 | nx1 = tileComp->resLevels[r+1].x1; | |
2483 | ny1 = tileComp->resLevels[r+1].y1; | |
2484 | } | |
2485 | inverseTransformLevel(tileComp, r, resLevel, nx0, ny0, nx1, ny1); | |
2486 | } | |
2487 | } | |
2488 | ||
2489 | // Do one level of the inverse transform: | |
2490 | // - take (n)LL from the tile-component data array | |
2491 | // - take (n)HL/LH/HH from <resLevel> | |
2492 | // - leave the resulting (n-1)LL in the tile-component data array | |
2493 | void JPXStream::inverseTransformLevel(JPXTileComp *tileComp, | |
2494 | Guint r, JPXResLevel *resLevel, | |
2495 | Guint nx0, Guint ny0, | |
2496 | Guint nx1, Guint ny1) { | |
2497 | JPXPrecinct *precinct; | |
2498 | JPXSubband *subband; | |
2499 | JPXCodeBlock *cb; | |
2500 | JPXCoeff *coeff0, *coeff; | |
2501 | Guint qStyle, guard, eps, shift, t; | |
2502 | int shift2; | |
2503 | double mu; | |
2504 | int val; | |
2505 | int *dataPtr; | |
2506 | Guint xo, yo; | |
2507 | Guint x, y, sb, cbX, cbY; | |
2508 | int xx, yy; | |
2509 | ||
2510 | //----- interleave | |
2511 | ||
2512 | // spread out LL | |
2513 | for (yy = resLevel->y1 - 1; yy >= (int)resLevel->y0; --yy) { | |
2514 | for (xx = resLevel->x1 - 1; xx >= (int)resLevel->x0; --xx) { | |
2515 | tileComp->data[(2 * yy - ny0) * (tileComp->x1 - tileComp->x0) | |
2516 | + (2 * xx - nx0)] = | |
2517 | tileComp->data[(yy - resLevel->y0) * (tileComp->x1 - tileComp->x0) | |
2518 | + (xx - resLevel->x0)]; | |
2519 | } | |
2520 | } | |
2521 | ||
2522 | // i-quant parameters | |
2523 | qStyle = tileComp->quantStyle & 0x1f; | |
2524 | guard = (tileComp->quantStyle >> 5) & 7; | |
2525 | ||
2526 | // interleave HL/LH/HH | |
2527 | precinct = &resLevel->precincts[0]; | |
2528 | for (sb = 0; sb < 3; ++sb) { | |
2529 | ||
2530 | // i-quant parameters | |
2531 | if (qStyle == 0) { | |
2532 | eps = (tileComp->quantSteps[3*r - 2 + sb] >> 3) & 0x1f; | |
2533 | shift = guard + eps - 1; | |
2534 | mu = 0; // make gcc happy | |
2535 | } else { | |
2536 | shift = guard + tileComp->prec; | |
2537 | if (sb == 2) { | |
2538 | ++shift; | |
2539 | } | |
2540 | t = tileComp->quantSteps[qStyle == 1 ? 0 : (3*r - 2 + sb)]; | |
2541 | mu = (double)(0x800 + (t & 0x7ff)) / 2048.0; | |
2542 | } | |
2543 | if (tileComp->transform == 0) { | |
2544 | shift += fracBits; | |
2545 | } | |
2546 | ||
2547 | // copy the subband coefficients into the data array, doing the | |
2548 | // fixed point adjustment and dequantization along the way | |
2549 | xo = (sb & 1) ? 0 : 1; | |
2550 | yo = (sb > 0) ? 1 : 0; | |
2551 | subband = &precinct->subbands[sb]; | |
2552 | cb = subband->cbs; | |
2553 | for (cbY = 0; cbY < subband->nYCBs; ++cbY) { | |
2554 | for (cbX = 0; cbX < subband->nXCBs; ++cbX) { | |
2555 | for (y = cb->y0, coeff0 = cb->coeffs; | |
2556 | y < cb->y1; | |
2557 | ++y, coeff0 += tileComp->cbW) { | |
2558 | dataPtr = &tileComp->data[(2 * y + yo - ny0) | |
2559 | * (tileComp->x1 - tileComp->x0) | |
2560 | + (2 * cb->x0 + xo - nx0)]; | |
2561 | for (x = cb->x0, coeff = coeff0; x < cb->x1; ++x, ++coeff) { | |
2562 | val = (int)coeff->mag; | |
2563 | if (val != 0) { | |
2564 | shift2 = shift - (cb->nZeroBitPlanes + coeff->len); | |
2565 | if (shift2 > 0) { | |
2566 | val = (val << shift2) + (1 << (shift2 - 1)); | |
2567 | } else { | |
2568 | val >>= -shift2; | |
2569 | } | |
2570 | if (qStyle == 0) { | |
2571 | if (tileComp->transform == 0) { | |
2572 | val &= -1 << fracBits; | |
2573 | } | |
2574 | } else { | |
2575 | val = (int)((double)val * mu); | |
2576 | } | |
2577 | if (coeff->flags & jpxCoeffSign) { | |
2578 | val = -val; | |
2579 | } | |
2580 | } | |
2581 | *dataPtr = val; | |
2582 | dataPtr += 2; | |
2583 | } | |
2584 | } | |
2585 | ++cb; | |
2586 | } | |
2587 | } | |
2588 | } | |
2589 | ||
2590 | //----- horizontal (row) transforms | |
2591 | dataPtr = tileComp->data; | |
2592 | for (y = 0; y < ny1 - ny0; ++y) { | |
2593 | inverseTransform1D(tileComp, dataPtr, 1, nx0, nx1); | |
2594 | dataPtr += tileComp->x1 - tileComp->x0; | |
2595 | } | |
2596 | ||
2597 | //----- vertical (column) transforms | |
2598 | dataPtr = tileComp->data; | |
2599 | for (x = 0; x < nx1 - nx0; ++x) { | |
2600 | inverseTransform1D(tileComp, dataPtr, | |
2601 | tileComp->x1 - tileComp->x0, ny0, ny1); | |
2602 | ++dataPtr; | |
2603 | } | |
2604 | } | |
2605 | ||
2606 | void JPXStream::inverseTransform1D(JPXTileComp *tileComp, | |
2607 | int *data, Guint stride, | |
2608 | Guint i0, Guint i1) { | |
2609 | int *buf; | |
2610 | Guint offset, end, i; | |
2611 | ||
2612 | //----- special case for length = 1 | |
2613 | if (i1 - i0 == 1) { | |
2614 | if (i0 & 1) { | |
2615 | *data >>= 1; | |
2616 | } | |
2617 | ||
2618 | } else { | |
2619 | ||
2620 | // choose an offset: this makes even buf[] indexes correspond to | |
2621 | // odd values of i, and vice versa | |
2622 | offset = 3 + (i0 & 1); | |
2623 | end = offset + i1 - i0; | |
2624 | ||
2625 | //----- gather | |
2626 | buf = tileComp->buf; | |
2627 | for (i = 0; i < i1 - i0; ++i) { | |
2628 | buf[offset + i] = data[i * stride]; | |
2629 | } | |
2630 | ||
2631 | //----- extend right | |
2632 | buf[end] = buf[end - 2]; | |
2633 | if (i1 - i0 == 2) { | |
2634 | buf[end+1] = buf[offset + 1]; | |
2635 | buf[end+2] = buf[offset]; | |
2636 | buf[end+3] = buf[offset + 1]; | |
2637 | } else { | |
2638 | buf[end+1] = buf[end - 3]; | |
2639 | if (i1 - i0 == 3) { | |
2640 | buf[end+2] = buf[offset + 1]; | |
2641 | buf[end+3] = buf[offset + 2]; | |
2642 | } else { | |
2643 | buf[end+2] = buf[end - 4]; | |
2644 | if (i1 - i0 == 4) { | |
2645 | buf[end+3] = buf[offset + 1]; | |
2646 | } else { | |
2647 | buf[end+3] = buf[end - 5]; | |
2648 | } | |
2649 | } | |
2650 | } | |
2651 | ||
2652 | //----- extend left | |
2653 | buf[offset - 1] = buf[offset + 1]; | |
2654 | buf[offset - 2] = buf[offset + 2]; | |
2655 | buf[offset - 3] = buf[offset + 3]; | |
2656 | if (offset == 4) { | |
2657 | buf[0] = buf[offset + 4]; | |
2658 | } | |
2659 | ||
2660 | //----- 9-7 irreversible filter | |
2661 | ||
2662 | if (tileComp->transform == 0) { | |
2663 | // step 1 (even) | |
2664 | for (i = 1; i <= end + 2; i += 2) { | |
2665 | buf[i] = (int)(idwtKappa * buf[i]); | |
2666 | } | |
2667 | // step 2 (odd) | |
2668 | for (i = 0; i <= end + 3; i += 2) { | |
2669 | buf[i] = (int)(idwtIKappa * buf[i]); | |
2670 | } | |
2671 | // step 3 (even) | |
2672 | for (i = 1; i <= end + 2; i += 2) { | |
2673 | buf[i] = (int)(buf[i] - idwtDelta * (buf[i-1] + buf[i+1])); | |
2674 | } | |
2675 | // step 4 (odd) | |
2676 | for (i = 2; i <= end + 1; i += 2) { | |
2677 | buf[i] = (int)(buf[i] - idwtGamma * (buf[i-1] + buf[i+1])); | |
2678 | } | |
2679 | // step 5 (even) | |
2680 | for (i = 3; i <= end; i += 2) { | |
2681 | buf[i] = (int)(buf[i] - idwtBeta * (buf[i-1] + buf[i+1])); | |
2682 | } | |
2683 | // step 6 (odd) | |
2684 | for (i = 4; i <= end - 1; i += 2) { | |
2685 | buf[i] = (int)(buf[i] - idwtAlpha * (buf[i-1] + buf[i+1])); | |
2686 | } | |
2687 | ||
2688 | //----- 5-3 reversible filter | |
2689 | ||
2690 | } else { | |
2691 | // step 1 (even) | |
2692 | for (i = 3; i <= end; i += 2) { | |
2693 | buf[i] -= (buf[i-1] + buf[i+1] + 2) >> 2; | |
2694 | } | |
2695 | // step 2 (odd) | |
2696 | for (i = 4; i < end; i += 2) { | |
2697 | buf[i] += (buf[i-1] + buf[i+1]) >> 1; | |
2698 | } | |
2699 | } | |
2700 | ||
2701 | //----- scatter | |
2702 | for (i = 0; i < i1 - i0; ++i) { | |
2703 | data[i * stride] = buf[offset + i]; | |
2704 | } | |
2705 | } | |
2706 | } | |
2707 | ||
2708 | // Inverse multi-component transform and DC level shift. This also | |
2709 | // converts fixed point samples back to integers. | |
2710 | GBool JPXStream::inverseMultiCompAndDC(JPXTile *tile) { | |
2711 | JPXTileComp *tileComp; | |
2712 | int coeff, d0, d1, d2, t, minVal, maxVal, zeroVal; | |
2713 | int *dataPtr; | |
2714 | Guint j, comp, x, y; | |
2715 | ||
2716 | //----- inverse multi-component transform | |
2717 | ||
2718 | if (tile->multiComp == 1) { | |
2719 | if (img.nComps < 3 || | |
2720 | tile->tileComps[0].hSep != tile->tileComps[1].hSep || | |
2721 | tile->tileComps[0].vSep != tile->tileComps[1].vSep || | |
2722 | tile->tileComps[1].hSep != tile->tileComps[2].hSep || | |
2723 | tile->tileComps[1].vSep != tile->tileComps[2].vSep) { | |
2724 | return gFalse; | |
2725 | } | |
2726 | ||
2727 | // inverse irreversible multiple component transform | |
2728 | if (tile->tileComps[0].transform == 0) { | |
2729 | j = 0; | |
2730 | for (y = 0; y < tile->tileComps[0].y1 - tile->tileComps[0].y0; ++y) { | |
2731 | for (x = 0; x < tile->tileComps[0].x1 - tile->tileComps[0].x0; ++x) { | |
2732 | d0 = tile->tileComps[0].data[j]; | |
2733 | d1 = tile->tileComps[1].data[j]; | |
2734 | d2 = tile->tileComps[2].data[j]; | |
2735 | tile->tileComps[0].data[j] = (int)(d0 + 1.402 * d2 + 0.5); | |
2736 | tile->tileComps[1].data[j] = | |
2737 | (int)(d0 - 0.34413 * d1 - 0.71414 * d2 + 0.5); | |
2738 | tile->tileComps[2].data[j] = (int)(d0 + 1.772 * d1 + 0.5); | |
2739 | ++j; | |
2740 | } | |
2741 | } | |
2742 | ||
2743 | // inverse reversible multiple component transform | |
2744 | } else { | |
2745 | j = 0; | |
2746 | for (y = 0; y < tile->tileComps[0].y1 - tile->tileComps[0].y0; ++y) { | |
2747 | for (x = 0; x < tile->tileComps[0].x1 - tile->tileComps[0].x0; ++x) { | |
2748 | d0 = tile->tileComps[0].data[j]; | |
2749 | d1 = tile->tileComps[1].data[j]; | |
2750 | d2 = tile->tileComps[2].data[j]; | |
2751 | tile->tileComps[1].data[j] = t = d0 - ((d2 + d1) >> 2); | |
2752 | tile->tileComps[0].data[j] = d2 + t; | |
2753 | tile->tileComps[2].data[j] = d1 + t; | |
2754 | ++j; | |
2755 | } | |
2756 | } | |
2757 | } | |
2758 | } | |
2759 | ||
2760 | //----- DC level shift | |
2761 | for (comp = 0; comp < img.nComps; ++comp) { | |
2762 | tileComp = &tile->tileComps[comp]; | |
2763 | ||
2764 | // signed: clip | |
2765 | if (tileComp->sgned) { | |
2766 | minVal = -(1 << (tileComp->prec - 1)); | |
2767 | maxVal = (1 << (tileComp->prec - 1)) - 1; | |
2768 | dataPtr = tileComp->data; | |
2769 | for (y = 0; y < tileComp->y1 - tileComp->y0; ++y) { | |
2770 | for (x = 0; x < tileComp->x1 - tileComp->x0; ++x) { | |
2771 | coeff = *dataPtr; | |
2772 | if (tileComp->transform == 0) { | |
2773 | coeff >>= fracBits; | |
2774 | } | |
2775 | if (coeff < minVal) { | |
2776 | coeff = minVal; | |
2777 | } else if (coeff > maxVal) { | |
2778 | coeff = maxVal; | |
2779 | } | |
2780 | *dataPtr++ = coeff; | |
2781 | } | |
2782 | } | |
2783 | ||
2784 | // unsigned: inverse DC level shift and clip | |
2785 | } else { | |
2786 | maxVal = (1 << tileComp->prec) - 1; | |
2787 | zeroVal = 1 << (tileComp->prec - 1); | |
2788 | dataPtr = tileComp->data; | |
2789 | for (y = 0; y < tileComp->y1 - tileComp->y0; ++y) { | |
2790 | for (x = 0; x < tileComp->x1 - tileComp->x0; ++x) { | |
2791 | coeff = *dataPtr; | |
2792 | if (tileComp->transform == 0) { | |
2793 | coeff >>= fracBits; | |
2794 | } | |
2795 | coeff += zeroVal; | |
2796 | if (coeff < 0) { | |
2797 | coeff = 0; | |
2798 | } else if (coeff > maxVal) { | |
2799 | coeff = maxVal; | |
2800 | } | |
2801 | *dataPtr++ = coeff; | |
2802 | } | |
2803 | } | |
2804 | } | |
2805 | } | |
2806 | ||
2807 | return gTrue; | |
2808 | } | |
2809 | ||
2810 | GBool JPXStream::readBoxHdr(Guint *boxType, Guint *boxLen, Guint *dataLen) { | |
2811 | Guint len, lenH; | |
2812 | ||
2813 | if (!readULong(&len) || | |
2814 | !readULong(boxType)) { | |
2815 | return gFalse; | |
2816 | } | |
2817 | if (len == 1) { | |
2818 | if (!readULong(&lenH) || !readULong(&len)) { | |
2819 | return gFalse; | |
2820 | } | |
2821 | if (lenH) { | |
2822 | error(getPos(), "JPX stream contains a box larger than 2^32 bytes"); | |
2823 | return gFalse; | |
2824 | } | |
2825 | *boxLen = len; | |
2826 | *dataLen = len - 16; | |
2827 | } else if (len == 0) { | |
2828 | *boxLen = 0; | |
2829 | *dataLen = 0; | |
2830 | } else { | |
2831 | *boxLen = len; | |
2832 | *dataLen = len - 8; | |
2833 | } | |
2834 | return gTrue; | |
2835 | } | |
2836 | ||
2837 | int JPXStream::readMarkerHdr(int *segType, Guint *segLen) { | |
2838 | int c; | |
2839 | ||
2840 | do { | |
2841 | do { | |
2842 | if ((c = str->getChar()) == EOF) { | |
2843 | return gFalse; | |
2844 | } | |
2845 | } while (c != 0xff); | |
2846 | do { | |
2847 | if ((c = str->getChar()) == EOF) { | |
2848 | return gFalse; | |
2849 | } | |
2850 | } while (c == 0xff); | |
2851 | } while (c == 0x00); | |
2852 | *segType = c; | |
2853 | if ((c >= 0x30 && c <= 0x3f) || | |
2854 | c == 0x4f || c == 0x92 || c == 0x93 || c == 0xd9) { | |
2855 | *segLen = 0; | |
2856 | return gTrue; | |
2857 | } | |
2858 | return readUWord(segLen); | |
2859 | } | |
2860 | ||
2861 | GBool JPXStream::readUByte(Guint *x) { | |
2862 | int c0; | |
2863 | ||
2864 | if ((c0 = str->getChar()) == EOF) { | |
2865 | return gFalse; | |
2866 | } | |
2867 | *x = (Guint)c0; | |
2868 | return gTrue; | |
2869 | } | |
2870 | ||
2871 | GBool JPXStream::readByte(int *x) { | |
2872 | int c0; | |
2873 | ||
2874 | if ((c0 = str->getChar()) == EOF) { | |
2875 | return gFalse; | |
2876 | } | |
2877 | *x = c0; | |
2878 | if (c0 & 0x80) { | |
2879 | *x |= -1 - 0xff; | |
2880 | } | |
2881 | return gTrue; | |
2882 | } | |
2883 | ||
2884 | GBool JPXStream::readUWord(Guint *x) { | |
2885 | int c0, c1; | |
2886 | ||
2887 | if ((c0 = str->getChar()) == EOF || | |
2888 | (c1 = str->getChar()) == EOF) { | |
2889 | return gFalse; | |
2890 | } | |
2891 | *x = (Guint)((c0 << 8) | c1); | |
2892 | return gTrue; | |
2893 | } | |
2894 | ||
2895 | GBool JPXStream::readULong(Guint *x) { | |
2896 | int c0, c1, c2, c3; | |
2897 | ||
2898 | if ((c0 = str->getChar()) == EOF || | |
2899 | (c1 = str->getChar()) == EOF || | |
2900 | (c2 = str->getChar()) == EOF || | |
2901 | (c3 = str->getChar()) == EOF) { | |
2902 | return gFalse; | |
2903 | } | |
2904 | *x = (Guint)((c0 << 24) | (c1 << 16) | (c2 << 8) | c3); | |
2905 | return gTrue; | |
2906 | } | |
2907 | ||
2908 | GBool JPXStream::readNBytes(int nBytes, GBool signd, int *x) { | |
2909 | int y, c, i; | |
2910 | ||
2911 | y = 0; | |
2912 | for (i = 0; i < nBytes; ++i) { | |
2913 | if ((c = str->getChar()) == EOF) { | |
2914 | return gFalse; | |
2915 | } | |
2916 | y = (y << 8) + c; | |
2917 | } | |
2918 | if (signd) { | |
2919 | if (y & (1 << (8 * nBytes - 1))) { | |
2920 | y |= -1 << (8 * nBytes); | |
2921 | } | |
2922 | } | |
2923 | *x = y; | |
2924 | return gTrue; | |
2925 | } | |
2926 | ||
2927 | GBool JPXStream::readBits(int nBits, Guint *x) { | |
2928 | int c; | |
2929 | ||
2930 | while (bitBufLen < nBits) { | |
2931 | if ((c = str->getChar()) == EOF) { | |
2932 | return gFalse; | |
2933 | } | |
2934 | ++byteCount; | |
2935 | if (bitBufSkip) { | |
2936 | bitBuf = (bitBuf << 7) | (c & 0x7f); | |
2937 | bitBufLen += 7; | |
2938 | } else { | |
2939 | bitBuf = (bitBuf << 8) | (c & 0xff); | |
2940 | bitBufLen += 8; | |
2941 | } | |
2942 | bitBufSkip = c == 0xff; | |
2943 | } | |
2944 | *x = (bitBuf >> (bitBufLen - nBits)) & ((1 << nBits) - 1); | |
2945 | bitBufLen -= nBits; | |
2946 | return gTrue; | |
2947 | } | |
2948 | ||
2949 | void JPXStream::clearBitBuf() { | |
2950 | bitBufLen = 0; | |
2951 | bitBufSkip = gFalse; | |
2952 | byteCount = 0; | |
2953 | } |