avcodec/jpeg2000dec: Skip SOP
[ffmpeg.git] / libavcodec / jpeg2000dec.c
1 /*
2  * JPEG 2000 image decoder
3  * Copyright (c) 2007 Kamil Nowosad
4  * Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22
23 /**
24  * @file
25  * JPEG 2000 image decoder
26  */
27
28 #include <inttypes.h>
29
30 #include "libavutil/attributes.h"
31 #include "libavutil/avassert.h"
32 #include "libavutil/common.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/pixdesc.h"
35 #include "avcodec.h"
36 #include "bytestream.h"
37 #include "internal.h"
38 #include "thread.h"
39 #include "jpeg2000.h"
40 #include "jpeg2000dsp.h"
41
42 #define JP2_SIG_TYPE    0x6A502020
43 #define JP2_SIG_VALUE   0x0D0A870A
44 #define JP2_CODESTREAM  0x6A703263
45 #define JP2_HEADER      0x6A703268
46
47 #define HAD_COC 0x01
48 #define HAD_QCC 0x02
49
50 typedef struct Jpeg2000TilePart {
51     uint8_t tile_index;                 // Tile index who refers the tile-part
52     const uint8_t *tp_end;
53     GetByteContext tpg;                 // bit stream in tile-part
54 } Jpeg2000TilePart;
55
56 /* RMK: For JPEG2000 DCINEMA 3 tile-parts in a tile
57  * one per component, so tile_part elements have a size of 3 */
58 typedef struct Jpeg2000Tile {
59     Jpeg2000Component   *comp;
60     uint8_t             properties[4];
61     Jpeg2000CodingStyle codsty[4];
62     Jpeg2000QuantStyle  qntsty[4];
63     Jpeg2000TilePart    tile_part[6];
64     uint16_t tp_idx;                    // Tile-part index
65 } Jpeg2000Tile;
66
67 typedef struct Jpeg2000DecoderContext {
68     AVClass         *class;
69     AVCodecContext  *avctx;
70     GetByteContext  g;
71
72     int             width, height;
73     int             image_offset_x, image_offset_y;
74     int             tile_offset_x, tile_offset_y;
75     uint8_t         cbps[4];    // bits per sample in particular components
76     uint8_t         sgnd[4];    // if a component is signed
77     uint8_t         properties[4];
78     int             cdx[4], cdy[4];
79     int             precision;
80     int             ncomponents;
81     int             colour_space;
82     uint32_t        palette[256];
83     int8_t          pal8;
84     int             cdef[4];
85     int             tile_width, tile_height;
86     unsigned        numXtiles, numYtiles;
87     int             maxtilelen;
88
89     Jpeg2000CodingStyle codsty[4];
90     Jpeg2000QuantStyle  qntsty[4];
91
92     int             bit_index;
93
94     int             curtileno;
95
96     Jpeg2000Tile    *tile;
97     Jpeg2000DSPContext dsp;
98
99     /*options parameters*/
100     int             reduction_factor;
101 } Jpeg2000DecoderContext;
102
103 /* get_bits functions for JPEG2000 packet bitstream
104  * It is a get_bit function with a bit-stuffing routine. If the value of the
105  * byte is 0xFF, the next byte includes an extra zero bit stuffed into the MSB.
106  * cf. ISO-15444-1:2002 / B.10.1 Bit-stuffing routine */
107 static int get_bits(Jpeg2000DecoderContext *s, int n)
108 {
109     int res = 0;
110
111     while (--n >= 0) {
112         res <<= 1;
113         if (s->bit_index == 0) {
114             s->bit_index = 7 + (bytestream2_get_byte(&s->g) != 0xFFu);
115         }
116         s->bit_index--;
117         res |= (bytestream2_peek_byte(&s->g) >> s->bit_index) & 1;
118     }
119     return res;
120 }
121
122 static void jpeg2000_flush(Jpeg2000DecoderContext *s)
123 {
124     if (bytestream2_get_byte(&s->g) == 0xff)
125         bytestream2_skip(&s->g, 1);
126     s->bit_index = 8;
127 }
128
129 /* decode the value stored in node */
130 static int tag_tree_decode(Jpeg2000DecoderContext *s, Jpeg2000TgtNode *node,
131                            int threshold)
132 {
133     Jpeg2000TgtNode *stack[30];
134     int sp = -1, curval = 0;
135
136     if (!node) {
137         av_log(s->avctx, AV_LOG_ERROR, "missing node\n");
138         return AVERROR_INVALIDDATA;
139     }
140
141     while (node && !node->vis) {
142         stack[++sp] = node;
143         node        = node->parent;
144     }
145
146     if (node)
147         curval = node->val;
148     else
149         curval = stack[sp]->val;
150
151     while (curval < threshold && sp >= 0) {
152         if (curval < stack[sp]->val)
153             curval = stack[sp]->val;
154         while (curval < threshold) {
155             int ret;
156             if ((ret = get_bits(s, 1)) > 0) {
157                 stack[sp]->vis++;
158                 break;
159             } else if (!ret)
160                 curval++;
161             else
162                 return ret;
163         }
164         stack[sp]->val = curval;
165         sp--;
166     }
167     return curval;
168 }
169
170 static int pix_fmt_match(enum AVPixelFormat pix_fmt, int components,
171                          int bpc, uint32_t log2_chroma_wh, int pal8)
172 {
173     int match = 1;
174     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
175
176     av_assert2(desc);
177
178     if (desc->nb_components != components) {
179         return 0;
180     }
181
182     switch (components) {
183     case 4:
184         match = match && desc->comp[3].depth_minus1 + 1 >= bpc &&
185                          (log2_chroma_wh >> 14 & 3) == 0 &&
186                          (log2_chroma_wh >> 12 & 3) == 0;
187     case 3:
188         match = match && desc->comp[2].depth_minus1 + 1 >= bpc &&
189                          (log2_chroma_wh >> 10 & 3) == desc->log2_chroma_w &&
190                          (log2_chroma_wh >>  8 & 3) == desc->log2_chroma_h;
191     case 2:
192         match = match && desc->comp[1].depth_minus1 + 1 >= bpc &&
193                          (log2_chroma_wh >>  6 & 3) == desc->log2_chroma_w &&
194                          (log2_chroma_wh >>  4 & 3) == desc->log2_chroma_h;
195
196     case 1:
197         match = match && desc->comp[0].depth_minus1 + 1 >= bpc &&
198                          (log2_chroma_wh >>  2 & 3) == 0 &&
199                          (log2_chroma_wh       & 3) == 0 &&
200                          (desc->flags & AV_PIX_FMT_FLAG_PAL) == pal8 * AV_PIX_FMT_FLAG_PAL;
201     }
202     return match;
203 }
204
205 // pix_fmts with lower bpp have to be listed before
206 // similar pix_fmts with higher bpp.
207 #define RGB_PIXEL_FORMATS   AV_PIX_FMT_PAL8,AV_PIX_FMT_RGB24,AV_PIX_FMT_RGBA,AV_PIX_FMT_RGB48,AV_PIX_FMT_RGBA64
208 #define GRAY_PIXEL_FORMATS  AV_PIX_FMT_GRAY8,AV_PIX_FMT_GRAY8A,AV_PIX_FMT_GRAY16,AV_PIX_FMT_YA16
209 #define YUV_PIXEL_FORMATS   AV_PIX_FMT_YUV410P,AV_PIX_FMT_YUV411P,AV_PIX_FMT_YUVA420P, \
210                             AV_PIX_FMT_YUV420P,AV_PIX_FMT_YUV422P,AV_PIX_FMT_YUVA422P, \
211                             AV_PIX_FMT_YUV440P,AV_PIX_FMT_YUV444P,AV_PIX_FMT_YUVA444P, \
212                             AV_PIX_FMT_YUV420P9,AV_PIX_FMT_YUV422P9,AV_PIX_FMT_YUV444P9, \
213                             AV_PIX_FMT_YUVA420P9,AV_PIX_FMT_YUVA422P9,AV_PIX_FMT_YUVA444P9, \
214                             AV_PIX_FMT_YUV420P10,AV_PIX_FMT_YUV422P10,AV_PIX_FMT_YUV444P10, \
215                             AV_PIX_FMT_YUVA420P10,AV_PIX_FMT_YUVA422P10,AV_PIX_FMT_YUVA444P10, \
216                             AV_PIX_FMT_YUV420P12,AV_PIX_FMT_YUV422P12,AV_PIX_FMT_YUV444P12, \
217                             AV_PIX_FMT_YUV420P14,AV_PIX_FMT_YUV422P14,AV_PIX_FMT_YUV444P14, \
218                             AV_PIX_FMT_YUV420P16,AV_PIX_FMT_YUV422P16,AV_PIX_FMT_YUV444P16, \
219                             AV_PIX_FMT_YUVA420P16,AV_PIX_FMT_YUVA422P16,AV_PIX_FMT_YUVA444P16
220 #define XYZ_PIXEL_FORMATS   AV_PIX_FMT_XYZ12
221
222 static const enum AVPixelFormat rgb_pix_fmts[]  = {RGB_PIXEL_FORMATS};
223 static const enum AVPixelFormat gray_pix_fmts[] = {GRAY_PIXEL_FORMATS};
224 static const enum AVPixelFormat yuv_pix_fmts[]  = {YUV_PIXEL_FORMATS};
225 static const enum AVPixelFormat xyz_pix_fmts[]  = {XYZ_PIXEL_FORMATS,
226                                                    YUV_PIXEL_FORMATS};
227 static const enum AVPixelFormat all_pix_fmts[]  = {RGB_PIXEL_FORMATS,
228                                                    GRAY_PIXEL_FORMATS,
229                                                    YUV_PIXEL_FORMATS,
230                                                    XYZ_PIXEL_FORMATS};
231
232 /* marker segments */
233 /* get sizes and offsets of image, tiles; number of components */
234 static int get_siz(Jpeg2000DecoderContext *s)
235 {
236     int i;
237     int ncomponents;
238     uint32_t log2_chroma_wh = 0;
239     const enum AVPixelFormat *possible_fmts = NULL;
240     int possible_fmts_nb = 0;
241
242     if (bytestream2_get_bytes_left(&s->g) < 36) {
243         av_log(s->avctx, AV_LOG_ERROR, "Insufficient space for SIZ\n");
244         return AVERROR_INVALIDDATA;
245     }
246
247     s->avctx->profile = bytestream2_get_be16u(&s->g); // Rsiz
248     s->width          = bytestream2_get_be32u(&s->g); // Width
249     s->height         = bytestream2_get_be32u(&s->g); // Height
250     s->image_offset_x = bytestream2_get_be32u(&s->g); // X0Siz
251     s->image_offset_y = bytestream2_get_be32u(&s->g); // Y0Siz
252     s->tile_width     = bytestream2_get_be32u(&s->g); // XTSiz
253     s->tile_height    = bytestream2_get_be32u(&s->g); // YTSiz
254     s->tile_offset_x  = bytestream2_get_be32u(&s->g); // XT0Siz
255     s->tile_offset_y  = bytestream2_get_be32u(&s->g); // YT0Siz
256     ncomponents       = bytestream2_get_be16u(&s->g); // CSiz
257
258     if (s->image_offset_x || s->image_offset_y) {
259         avpriv_request_sample(s->avctx, "Support for image offsets");
260         return AVERROR_PATCHWELCOME;
261     }
262
263     if (ncomponents <= 0) {
264         av_log(s->avctx, AV_LOG_ERROR, "Invalid number of components: %d\n",
265                s->ncomponents);
266         return AVERROR_INVALIDDATA;
267     }
268
269     if (ncomponents > 4) {
270         avpriv_request_sample(s->avctx, "Support for %d components",
271                               ncomponents);
272         return AVERROR_PATCHWELCOME;
273     }
274
275     s->ncomponents = ncomponents;
276
277     if (s->tile_width <= 0 || s->tile_height <= 0) {
278         av_log(s->avctx, AV_LOG_ERROR, "Invalid tile dimension %dx%d.\n",
279                s->tile_width, s->tile_height);
280         return AVERROR_INVALIDDATA;
281     }
282
283     if (bytestream2_get_bytes_left(&s->g) < 3 * s->ncomponents) {
284         av_log(s->avctx, AV_LOG_ERROR, "Insufficient space for %d components in SIZ\n", s->ncomponents);
285         return AVERROR_INVALIDDATA;
286     }
287
288     for (i = 0; i < s->ncomponents; i++) { // Ssiz_i XRsiz_i, YRsiz_i
289         uint8_t x    = bytestream2_get_byteu(&s->g);
290         s->cbps[i]   = (x & 0x7f) + 1;
291         s->precision = FFMAX(s->cbps[i], s->precision);
292         s->sgnd[i]   = !!(x & 0x80);
293         s->cdx[i]    = bytestream2_get_byteu(&s->g);
294         s->cdy[i]    = bytestream2_get_byteu(&s->g);
295         if (   !s->cdx[i] || s->cdx[i] == 3 || s->cdx[i] > 4
296             || !s->cdy[i] || s->cdy[i] == 3 || s->cdy[i] > 4) {
297             av_log(s->avctx, AV_LOG_ERROR, "Invalid sample separation %d/%d\n", s->cdx[i], s->cdy[i]);
298             return AVERROR_INVALIDDATA;
299         }
300         log2_chroma_wh |= s->cdy[i] >> 1 << i * 4 | s->cdx[i] >> 1 << i * 4 + 2;
301     }
302
303     s->numXtiles = ff_jpeg2000_ceildiv(s->width  - s->tile_offset_x, s->tile_width);
304     s->numYtiles = ff_jpeg2000_ceildiv(s->height - s->tile_offset_y, s->tile_height);
305
306     if (s->numXtiles * (uint64_t)s->numYtiles > INT_MAX/sizeof(*s->tile)) {
307         s->numXtiles = s->numYtiles = 0;
308         return AVERROR(EINVAL);
309     }
310
311     s->tile = av_mallocz_array(s->numXtiles * s->numYtiles, sizeof(*s->tile));
312     if (!s->tile) {
313         s->numXtiles = s->numYtiles = 0;
314         return AVERROR(ENOMEM);
315     }
316
317     for (i = 0; i < s->numXtiles * s->numYtiles; i++) {
318         Jpeg2000Tile *tile = s->tile + i;
319
320         tile->comp = av_mallocz(s->ncomponents * sizeof(*tile->comp));
321         if (!tile->comp)
322             return AVERROR(ENOMEM);
323     }
324
325     /* compute image size with reduction factor */
326     s->avctx->width  = ff_jpeg2000_ceildivpow2(s->width  - s->image_offset_x,
327                                                s->reduction_factor);
328     s->avctx->height = ff_jpeg2000_ceildivpow2(s->height - s->image_offset_y,
329                                                s->reduction_factor);
330
331     if (s->avctx->profile == FF_PROFILE_JPEG2000_DCINEMA_2K ||
332         s->avctx->profile == FF_PROFILE_JPEG2000_DCINEMA_4K) {
333         possible_fmts = xyz_pix_fmts;
334         possible_fmts_nb = FF_ARRAY_ELEMS(xyz_pix_fmts);
335     } else {
336         switch (s->colour_space) {
337         case 16:
338             possible_fmts = rgb_pix_fmts;
339             possible_fmts_nb = FF_ARRAY_ELEMS(rgb_pix_fmts);
340             break;
341         case 17:
342             possible_fmts = gray_pix_fmts;
343             possible_fmts_nb = FF_ARRAY_ELEMS(gray_pix_fmts);
344             break;
345         case 18:
346             possible_fmts = yuv_pix_fmts;
347             possible_fmts_nb = FF_ARRAY_ELEMS(yuv_pix_fmts);
348             break;
349         default:
350             possible_fmts = all_pix_fmts;
351             possible_fmts_nb = FF_ARRAY_ELEMS(all_pix_fmts);
352             break;
353         }
354     }
355     for (i = 0; i < possible_fmts_nb; ++i) {
356         if (pix_fmt_match(possible_fmts[i], ncomponents, s->precision, log2_chroma_wh, s->pal8)) {
357             s->avctx->pix_fmt = possible_fmts[i];
358             break;
359         }
360     }
361
362     if (i == possible_fmts_nb) {
363         if (ncomponents == 4 &&
364             s->cdy[0] == 1 && s->cdx[0] == 1 &&
365             s->cdy[1] == 1 && s->cdx[1] == 1 &&
366             s->cdy[2] == s->cdy[3] && s->cdx[2] == s->cdx[3]) {
367             if (s->precision == 8 && s->cdy[2] == 2 && s->cdx[2] == 2 && !s->pal8) {
368                 s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
369                 s->cdef[0] = 0;
370                 s->cdef[1] = 1;
371                 s->cdef[2] = 2;
372                 s->cdef[3] = 3;
373                 i = 0;
374             }
375         }
376     }
377
378
379     if (i == possible_fmts_nb) {
380         av_log(s->avctx, AV_LOG_ERROR,
381                "Unknown pix_fmt, profile: %d, colour_space: %d, "
382                "components: %d, precision: %d\n"
383                "cdx[0]: %d, cdy[0]: %d\n"
384                "cdx[1]: %d, cdy[1]: %d\n"
385                "cdx[2]: %d, cdy[2]: %d\n"
386                "cdx[3]: %d, cdy[3]: %d\n",
387                s->avctx->profile, s->colour_space, ncomponents, s->precision,
388                s->cdx[0],
389                s->cdy[0],
390                ncomponents > 1 ? s->cdx[1] : 0,
391                ncomponents > 1 ? s->cdy[1] : 0,
392                ncomponents > 2 ? s->cdx[2] : 0,
393                ncomponents > 2 ? s->cdy[2] : 0,
394                ncomponents > 3 ? s->cdx[3] : 0,
395                ncomponents > 3 ? s->cdy[3] : 0);
396         return AVERROR_PATCHWELCOME;
397     }
398     s->avctx->bits_per_raw_sample = s->precision;
399     return 0;
400 }
401
402 /* get common part for COD and COC segments */
403 static int get_cox(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c)
404 {
405     uint8_t byte;
406
407     if (bytestream2_get_bytes_left(&s->g) < 5) {
408         av_log(s->avctx, AV_LOG_ERROR, "Insufficient space for COX\n");
409         return AVERROR_INVALIDDATA;
410     }
411
412     /*  nreslevels = number of resolution levels
413                    = number of decomposition level +1 */
414     c->nreslevels = bytestream2_get_byteu(&s->g) + 1;
415     if (c->nreslevels >= JPEG2000_MAX_RESLEVELS) {
416         av_log(s->avctx, AV_LOG_ERROR, "nreslevels %d is invalid\n", c->nreslevels);
417         return AVERROR_INVALIDDATA;
418     }
419
420     if (c->nreslevels <= s->reduction_factor) {
421         /* we are forced to update reduction_factor as its requested value is
422            not compatible with this bitstream, and as we might have used it
423            already in setup earlier we have to fail this frame until
424            reinitialization is implemented */
425         av_log(s->avctx, AV_LOG_ERROR, "reduction_factor too large for this bitstream, max is %d\n", c->nreslevels - 1);
426         s->reduction_factor = c->nreslevels - 1;
427         return AVERROR(EINVAL);
428     }
429
430     /* compute number of resolution levels to decode */
431     c->nreslevels2decode = c->nreslevels - s->reduction_factor;
432
433     c->log2_cblk_width  = (bytestream2_get_byteu(&s->g) & 15) + 2; // cblk width
434     c->log2_cblk_height = (bytestream2_get_byteu(&s->g) & 15) + 2; // cblk height
435
436     if (c->log2_cblk_width > 10 || c->log2_cblk_height > 10 ||
437         c->log2_cblk_width + c->log2_cblk_height > 12) {
438         av_log(s->avctx, AV_LOG_ERROR, "cblk size invalid\n");
439         return AVERROR_INVALIDDATA;
440     }
441
442     if (c->log2_cblk_width > 6 || c->log2_cblk_height > 6) {
443         avpriv_request_sample(s->avctx, "cblk size > 64");
444         return AVERROR_PATCHWELCOME;
445     }
446
447     c->cblk_style = bytestream2_get_byteu(&s->g);
448     if (c->cblk_style != 0) { // cblk style
449         av_log(s->avctx, AV_LOG_WARNING, "extra cblk styles %X\n", c->cblk_style);
450         if (c->cblk_style & JPEG2000_CBLK_BYPASS)
451             av_log(s->avctx, AV_LOG_WARNING, "Selective arithmetic coding bypass\n");
452     }
453     c->transform = bytestream2_get_byteu(&s->g); // DWT transformation type
454     /* set integer 9/7 DWT in case of BITEXACT flag */
455     if ((s->avctx->flags & CODEC_FLAG_BITEXACT) && (c->transform == FF_DWT97))
456         c->transform = FF_DWT97_INT;
457
458     if (c->csty & JPEG2000_CSTY_PREC) {
459         int i;
460         for (i = 0; i < c->nreslevels; i++) {
461             byte = bytestream2_get_byte(&s->g);
462             c->log2_prec_widths[i]  =  byte       & 0x0F;    // precinct PPx
463             c->log2_prec_heights[i] = (byte >> 4) & 0x0F;    // precinct PPy
464         }
465     } else {
466         memset(c->log2_prec_widths , 15, sizeof(c->log2_prec_widths ));
467         memset(c->log2_prec_heights, 15, sizeof(c->log2_prec_heights));
468     }
469     return 0;
470 }
471
472 /* get coding parameters for a particular tile or whole image*/
473 static int get_cod(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c,
474                    uint8_t *properties)
475 {
476     Jpeg2000CodingStyle tmp;
477     int compno, ret;
478
479     if (bytestream2_get_bytes_left(&s->g) < 5) {
480         av_log(s->avctx, AV_LOG_ERROR, "Insufficient space for COD\n");
481         return AVERROR_INVALIDDATA;
482     }
483
484     tmp.csty = bytestream2_get_byteu(&s->g);
485
486     // get progression order
487     tmp.prog_order = bytestream2_get_byteu(&s->g);
488
489     tmp.nlayers    = bytestream2_get_be16u(&s->g);
490     tmp.mct        = bytestream2_get_byteu(&s->g); // multiple component transformation
491
492     if (tmp.mct && s->ncomponents < 3) {
493         av_log(s->avctx, AV_LOG_ERROR,
494                "MCT %"PRIu8" with too few components (%d)\n",
495                tmp.mct, s->ncomponents);
496         return AVERROR_INVALIDDATA;
497     }
498
499     if ((ret = get_cox(s, &tmp)) < 0)
500         return ret;
501
502     for (compno = 0; compno < s->ncomponents; compno++)
503         if (!(properties[compno] & HAD_COC))
504             memcpy(c + compno, &tmp, sizeof(tmp));
505     return 0;
506 }
507
508 /* Get coding parameters for a component in the whole image or a
509  * particular tile. */
510 static int get_coc(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c,
511                    uint8_t *properties)
512 {
513     int compno, ret;
514
515     if (bytestream2_get_bytes_left(&s->g) < 2) {
516         av_log(s->avctx, AV_LOG_ERROR, "Insufficient space for COC\n");
517         return AVERROR_INVALIDDATA;
518     }
519
520     compno = bytestream2_get_byteu(&s->g);
521
522     if (compno >= s->ncomponents) {
523         av_log(s->avctx, AV_LOG_ERROR,
524                "Invalid compno %d. There are %d components in the image.\n",
525                compno, s->ncomponents);
526         return AVERROR_INVALIDDATA;
527     }
528
529     c      += compno;
530     c->csty = bytestream2_get_byteu(&s->g);
531
532     if ((ret = get_cox(s, c)) < 0)
533         return ret;
534
535     properties[compno] |= HAD_COC;
536     return 0;
537 }
538
539 /* Get common part for QCD and QCC segments. */
540 static int get_qcx(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q)
541 {
542     int i, x;
543
544     if (bytestream2_get_bytes_left(&s->g) < 1)
545         return AVERROR_INVALIDDATA;
546
547     x = bytestream2_get_byteu(&s->g); // Sqcd
548
549     q->nguardbits = x >> 5;
550     q->quantsty   = x & 0x1f;
551
552     if (q->quantsty == JPEG2000_QSTY_NONE) {
553         n -= 3;
554         if (bytestream2_get_bytes_left(&s->g) < n ||
555             n > JPEG2000_MAX_DECLEVELS*3)
556             return AVERROR_INVALIDDATA;
557         for (i = 0; i < n; i++)
558             q->expn[i] = bytestream2_get_byteu(&s->g) >> 3;
559     } else if (q->quantsty == JPEG2000_QSTY_SI) {
560         if (bytestream2_get_bytes_left(&s->g) < 2)
561             return AVERROR_INVALIDDATA;
562         x          = bytestream2_get_be16u(&s->g);
563         q->expn[0] = x >> 11;
564         q->mant[0] = x & 0x7ff;
565         for (i = 1; i < JPEG2000_MAX_DECLEVELS * 3; i++) {
566             int curexpn = FFMAX(0, q->expn[0] - (i - 1) / 3);
567             q->expn[i] = curexpn;
568             q->mant[i] = q->mant[0];
569         }
570     } else {
571         n = (n - 3) >> 1;
572         if (bytestream2_get_bytes_left(&s->g) < 2 * n ||
573             n > JPEG2000_MAX_DECLEVELS*3)
574             return AVERROR_INVALIDDATA;
575         for (i = 0; i < n; i++) {
576             x          = bytestream2_get_be16u(&s->g);
577             q->expn[i] = x >> 11;
578             q->mant[i] = x & 0x7ff;
579         }
580     }
581     return 0;
582 }
583
584 /* Get quantization parameters for a particular tile or a whole image. */
585 static int get_qcd(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
586                    uint8_t *properties)
587 {
588     Jpeg2000QuantStyle tmp;
589     int compno, ret;
590
591     memset(&tmp, 0, sizeof(tmp));
592
593     if ((ret = get_qcx(s, n, &tmp)) < 0)
594         return ret;
595     for (compno = 0; compno < s->ncomponents; compno++)
596         if (!(properties[compno] & HAD_QCC))
597             memcpy(q + compno, &tmp, sizeof(tmp));
598     return 0;
599 }
600
601 /* Get quantization parameters for a component in the whole image
602  * on in a particular tile. */
603 static int get_qcc(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
604                    uint8_t *properties)
605 {
606     int compno;
607
608     if (bytestream2_get_bytes_left(&s->g) < 1)
609         return AVERROR_INVALIDDATA;
610
611     compno = bytestream2_get_byteu(&s->g);
612
613     if (compno >= s->ncomponents) {
614         av_log(s->avctx, AV_LOG_ERROR,
615                "Invalid compno %d. There are %d components in the image.\n",
616                compno, s->ncomponents);
617         return AVERROR_INVALIDDATA;
618     }
619
620     properties[compno] |= HAD_QCC;
621     return get_qcx(s, n - 1, q + compno);
622 }
623
624 /* Get start of tile segment. */
625 static int get_sot(Jpeg2000DecoderContext *s, int n)
626 {
627     Jpeg2000TilePart *tp;
628     uint16_t Isot;
629     uint32_t Psot;
630     uint8_t TPsot;
631
632     if (bytestream2_get_bytes_left(&s->g) < 8)
633         return AVERROR_INVALIDDATA;
634
635     s->curtileno = 0;
636     Isot = bytestream2_get_be16u(&s->g);        // Isot
637     if (Isot >= s->numXtiles * s->numYtiles)
638         return AVERROR_INVALIDDATA;
639
640     s->curtileno = Isot;
641     Psot  = bytestream2_get_be32u(&s->g);       // Psot
642     TPsot = bytestream2_get_byteu(&s->g);       // TPsot
643
644     /* Read TNSot but not used */
645     bytestream2_get_byteu(&s->g);               // TNsot
646
647     if (!Psot)
648         Psot = bytestream2_get_bytes_left(&s->g) + n + 2;
649
650     if (Psot > bytestream2_get_bytes_left(&s->g) + n + 2) {
651         av_log(s->avctx, AV_LOG_ERROR, "Psot %"PRIu32" too big\n", Psot);
652         return AVERROR_INVALIDDATA;
653     }
654
655     if (TPsot >= FF_ARRAY_ELEMS(s->tile[Isot].tile_part)) {
656         avpriv_request_sample(s->avctx, "Support for %"PRIu8" components", TPsot);
657         return AVERROR_PATCHWELCOME;
658     }
659
660     s->tile[Isot].tp_idx = TPsot;
661     tp             = s->tile[Isot].tile_part + TPsot;
662     tp->tile_index = Isot;
663     tp->tp_end     = s->g.buffer + Psot - n - 2;
664
665     if (!TPsot) {
666         Jpeg2000Tile *tile = s->tile + s->curtileno;
667
668         /* copy defaults */
669         memcpy(tile->codsty, s->codsty, s->ncomponents * sizeof(Jpeg2000CodingStyle));
670         memcpy(tile->qntsty, s->qntsty, s->ncomponents * sizeof(Jpeg2000QuantStyle));
671     }
672
673     return 0;
674 }
675
676 /* Tile-part lengths: see ISO 15444-1:2002, section A.7.1
677  * Used to know the number of tile parts and lengths.
678  * There may be multiple TLMs in the header.
679  * TODO: The function is not used for tile-parts management, nor anywhere else.
680  * It can be useful to allocate memory for tile parts, before managing the SOT
681  * markers. Parsing the TLM header is needed to increment the input header
682  * buffer.
683  * This marker is mandatory for DCI. */
684 static uint8_t get_tlm(Jpeg2000DecoderContext *s, int n)
685 {
686     uint8_t Stlm, ST, SP, tile_tlm, i;
687     bytestream2_get_byte(&s->g);               /* Ztlm: skipped */
688     Stlm = bytestream2_get_byte(&s->g);
689
690     // too complex ? ST = ((Stlm >> 4) & 0x01) + ((Stlm >> 4) & 0x02);
691     ST = (Stlm >> 4) & 0x03;
692     // TODO: Manage case of ST = 0b11 --> raise error
693     SP       = (Stlm >> 6) & 0x01;
694     tile_tlm = (n - 4) / ((SP + 1) * 2 + ST);
695     for (i = 0; i < tile_tlm; i++) {
696         switch (ST) {
697         case 0:
698             break;
699         case 1:
700             bytestream2_get_byte(&s->g);
701             break;
702         case 2:
703             bytestream2_get_be16(&s->g);
704             break;
705         case 3:
706             bytestream2_get_be32(&s->g);
707             break;
708         }
709         if (SP == 0) {
710             bytestream2_get_be16(&s->g);
711         } else {
712             bytestream2_get_be32(&s->g);
713         }
714     }
715     return 0;
716 }
717
718 static uint8_t get_plt(Jpeg2000DecoderContext *s, int n)
719 {
720     int i;
721
722     av_log(s->avctx, AV_LOG_DEBUG,
723             "PLT marker at pos 0x%X\n", bytestream2_tell(&s->g) - 4);
724
725     /*Zplt =*/ bytestream2_get_byte(&s->g);
726
727     for (i = 0; i < n - 3; i++) {
728         bytestream2_get_byte(&s->g);
729     }
730
731     return 0;
732 }
733
734 static int init_tile(Jpeg2000DecoderContext *s, int tileno)
735 {
736     int compno;
737     int tilex = tileno % s->numXtiles;
738     int tiley = tileno / s->numXtiles;
739     Jpeg2000Tile *tile = s->tile + tileno;
740
741     if (!tile->comp)
742         return AVERROR(ENOMEM);
743
744     for (compno = 0; compno < s->ncomponents; compno++) {
745         Jpeg2000Component *comp = tile->comp + compno;
746         Jpeg2000CodingStyle *codsty = tile->codsty + compno;
747         Jpeg2000QuantStyle  *qntsty = tile->qntsty + compno;
748         int ret; // global bandno
749
750         comp->coord_o[0][0] = FFMAX(tilex       * s->tile_width  + s->tile_offset_x, s->image_offset_x);
751         comp->coord_o[0][1] = FFMIN((tilex + 1) * s->tile_width  + s->tile_offset_x, s->width);
752         comp->coord_o[1][0] = FFMAX(tiley       * s->tile_height + s->tile_offset_y, s->image_offset_y);
753         comp->coord_o[1][1] = FFMIN((tiley + 1) * s->tile_height + s->tile_offset_y, s->height);
754         if (compno) {
755             comp->coord_o[0][0] /= s->cdx[compno];
756             comp->coord_o[0][1] /= s->cdx[compno];
757             comp->coord_o[1][0] /= s->cdy[compno];
758             comp->coord_o[1][1] /= s->cdy[compno];
759         }
760
761         comp->coord[0][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][0], s->reduction_factor);
762         comp->coord[0][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][1], s->reduction_factor);
763         comp->coord[1][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[1][0], s->reduction_factor);
764         comp->coord[1][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[1][1], s->reduction_factor);
765
766         if (ret = ff_jpeg2000_init_component(comp, codsty, qntsty,
767                                              s->cbps[compno], s->cdx[compno],
768                                              s->cdy[compno], s->avctx))
769             return ret;
770     }
771     return 0;
772 }
773
774 /* Read the number of coding passes. */
775 static int getnpasses(Jpeg2000DecoderContext *s)
776 {
777     int num;
778     if (!get_bits(s, 1))
779         return 1;
780     if (!get_bits(s, 1))
781         return 2;
782     if ((num = get_bits(s, 2)) != 3)
783         return num < 0 ? num : 3 + num;
784     if ((num = get_bits(s, 5)) != 31)
785         return num < 0 ? num : 6 + num;
786     num = get_bits(s, 7);
787     return num < 0 ? num : 37 + num;
788 }
789
790 static int getlblockinc(Jpeg2000DecoderContext *s)
791 {
792     int res = 0, ret;
793     while (ret = get_bits(s, 1)) {
794         if (ret < 0)
795             return ret;
796         res++;
797     }
798     return res;
799 }
800
801 static int jpeg2000_decode_packet(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile, int *tp_index,
802                                   Jpeg2000CodingStyle *codsty,
803                                   Jpeg2000ResLevel *rlevel, int precno,
804                                   int layno, uint8_t *expn, int numgbits)
805 {
806     int bandno, cblkno, ret, nb_code_blocks;
807     int cwsno;
808
809     if (bytestream2_get_bytes_left(&s->g) == 0 && s->bit_index == 8) {
810         if (*tp_index < FF_ARRAY_ELEMS(tile->tile_part) - 1) {
811             s->g = tile->tile_part[++(*tp_index)].tpg;
812         }
813     }
814
815     if (bytestream2_peek_be32(&s->g) == 0xFF910004)
816         bytestream2_skip(&s->g, 6);
817
818     if (!(ret = get_bits(s, 1))) {
819         jpeg2000_flush(s);
820         return 0;
821     } else if (ret < 0)
822         return ret;
823
824     for (bandno = 0; bandno < rlevel->nbands; bandno++) {
825         Jpeg2000Band *band = rlevel->band + bandno;
826         Jpeg2000Prec *prec = band->prec + precno;
827
828         if (band->coord[0][0] == band->coord[0][1] ||
829             band->coord[1][0] == band->coord[1][1])
830             continue;
831         nb_code_blocks =  prec->nb_codeblocks_height *
832                           prec->nb_codeblocks_width;
833         for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
834             Jpeg2000Cblk *cblk = prec->cblk + cblkno;
835             int incl, newpasses, llen;
836
837             if (cblk->npasses)
838                 incl = get_bits(s, 1);
839             else
840                 incl = tag_tree_decode(s, prec->cblkincl + cblkno, layno + 1) == layno;
841             if (!incl)
842                 continue;
843             else if (incl < 0)
844                 return incl;
845
846             if (!cblk->npasses) {
847                 int v = expn[bandno] + numgbits - 1 -
848                         tag_tree_decode(s, prec->zerobits + cblkno, 100);
849                 if (v < 0) {
850                     av_log(s->avctx, AV_LOG_ERROR,
851                            "nonzerobits %d invalid\n", v);
852                     return AVERROR_INVALIDDATA;
853                 }
854                 cblk->nonzerobits = v;
855             }
856             if ((newpasses = getnpasses(s)) < 0)
857                 return newpasses;
858             av_assert2(newpasses > 0);
859             if (cblk->npasses + newpasses >= JPEG2000_MAX_PASSES) {
860                 avpriv_request_sample(s->avctx, "Too many passes\n");
861                 return AVERROR_PATCHWELCOME;
862             }
863             if ((llen = getlblockinc(s)) < 0)
864                 return llen;
865             if (cblk->lblock + llen + av_log2(newpasses) > 16) {
866                 avpriv_request_sample(s->avctx,
867                                       "Block with length beyond 16 bits\n");
868                 return AVERROR_PATCHWELCOME;
869             }
870
871             cblk->lblock += llen;
872
873             cblk->nb_lengthinc = 0;
874             cblk->nb_terminationsinc = 0;
875             do {
876                 int newpasses1 = 0;
877
878                 while (newpasses1 < newpasses) {
879                     newpasses1 ++;
880                     if (needs_termination(codsty->cblk_style, cblk->npasses + newpasses1 - 1)) {
881                         cblk->nb_terminationsinc ++;
882                         break;
883                     }
884                 }
885
886                 if ((ret = get_bits(s, av_log2(newpasses1) + cblk->lblock)) < 0)
887                     return ret;
888                 if (ret > sizeof(cblk->data)) {
889                     avpriv_request_sample(s->avctx,
890                                         "Block with lengthinc greater than %"SIZE_SPECIFIER"",
891                                         sizeof(cblk->data));
892                     return AVERROR_PATCHWELCOME;
893                 }
894                 cblk->lengthinc[cblk->nb_lengthinc++] = ret;
895                 cblk->npasses  += newpasses1;
896                 newpasses -= newpasses1;
897             } while(newpasses);
898         }
899     }
900     jpeg2000_flush(s);
901
902     if (codsty->csty & JPEG2000_CSTY_EPH) {
903         if (bytestream2_peek_be16(&s->g) == JPEG2000_EPH)
904             bytestream2_skip(&s->g, 2);
905         else
906             av_log(s->avctx, AV_LOG_ERROR, "EPH marker not found.\n");
907     }
908
909     for (bandno = 0; bandno < rlevel->nbands; bandno++) {
910         Jpeg2000Band *band = rlevel->band + bandno;
911         Jpeg2000Prec *prec = band->prec + precno;
912
913         nb_code_blocks = prec->nb_codeblocks_height * prec->nb_codeblocks_width;
914         for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
915             Jpeg2000Cblk *cblk = prec->cblk + cblkno;
916             for (cwsno = 0; cwsno < cblk->nb_lengthinc; cwsno ++) {
917                 if (   bytestream2_get_bytes_left(&s->g) < cblk->lengthinc[cwsno]
918                     || sizeof(cblk->data) < cblk->length + cblk->lengthinc[cwsno] + 4
919                 ) {
920                     av_log(s->avctx, AV_LOG_ERROR,
921                         "Block length %"PRIu16" or lengthinc %d is too large, left %d\n",
922                         cblk->length, cblk->lengthinc[cwsno], bytestream2_get_bytes_left(&s->g));
923                     return AVERROR_INVALIDDATA;
924                 }
925
926                 bytestream2_get_bufferu(&s->g, cblk->data + cblk->length, cblk->lengthinc[cwsno]);
927                 cblk->length   += cblk->lengthinc[cwsno];
928                 cblk->lengthinc[cwsno] = 0;
929                 if (cblk->nb_terminationsinc) {
930                     cblk->nb_terminationsinc--;
931                     cblk->nb_terminations++;
932                     cblk->data[cblk->length++] = 0xFF;
933                     cblk->data[cblk->length++] = 0xFF;
934                     cblk->data_start[cblk->nb_terminations] = cblk->length;
935                 }
936             }
937         }
938     }
939     return 0;
940 }
941
942 static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
943 {
944     int ret = 0;
945     int layno, reslevelno, compno, precno, ok_reslevel;
946     int x, y;
947     int tp_index = 0;
948     int step_x, step_y;
949
950     s->bit_index = 8;
951     switch (tile->codsty[0].prog_order) {
952     case JPEG2000_PGOD_RLCP:
953         av_log(s->avctx, AV_LOG_DEBUG, "Progression order RLCP\n");
954         ok_reslevel = 1;
955         for (reslevelno = 0; ok_reslevel; reslevelno++) {
956             ok_reslevel = 0;
957             for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
958                 for (compno = 0; compno < s->ncomponents; compno++) {
959                     Jpeg2000CodingStyle *codsty = tile->codsty + compno;
960                     Jpeg2000QuantStyle *qntsty  = tile->qntsty + compno;
961                     if (reslevelno < codsty->nreslevels) {
962                         Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel +
963                                                 reslevelno;
964                         ok_reslevel = 1;
965                         for (precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++)
966                             if ((ret = jpeg2000_decode_packet(s, tile, &tp_index,
967                                                               codsty, rlevel,
968                                                               precno, layno,
969                                                               qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
970                                                               qntsty->nguardbits)) < 0)
971                                 return ret;
972                     }
973                 }
974             }
975         }
976         break;
977
978     case JPEG2000_PGOD_LRCP:
979         av_log(s->avctx, AV_LOG_DEBUG, "Progression order LRCP\n");
980         for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
981             ok_reslevel = 1;
982             for (reslevelno = 0; ok_reslevel; reslevelno++) {
983                 ok_reslevel = 0;
984                 for (compno = 0; compno < s->ncomponents; compno++) {
985                     Jpeg2000CodingStyle *codsty = tile->codsty + compno;
986                     Jpeg2000QuantStyle *qntsty  = tile->qntsty + compno;
987                     if (reslevelno < codsty->nreslevels) {
988                         Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel +
989                                                 reslevelno;
990                         ok_reslevel = 1;
991                         for (precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++)
992                             if ((ret = jpeg2000_decode_packet(s, tile, &tp_index,
993                                                               codsty, rlevel,
994                                                               precno, layno,
995                                                               qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
996                                                               qntsty->nguardbits)) < 0)
997                                 return ret;
998                     }
999                 }
1000             }
1001         }
1002         break;
1003
1004     case JPEG2000_PGOD_CPRL:
1005         av_log(s->avctx, AV_LOG_DEBUG, "Progression order CPRL\n");
1006         for (compno = 0; compno < s->ncomponents; compno++) {
1007             Jpeg2000Component *comp     = tile->comp + compno;
1008             Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1009             Jpeg2000QuantStyle *qntsty  = tile->qntsty + compno;
1010             int maxlogstep_x = 0;
1011             int maxlogstep_y = 0;
1012             int start_x, start_y;
1013             step_x = 32;
1014             step_y = 32;
1015
1016             for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
1017                 uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; //  ==> N_L - r
1018                 Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
1019                 step_x = FFMIN(step_x, rlevel->log2_prec_width  + reducedresno);
1020                 step_y = FFMIN(step_y, rlevel->log2_prec_height + reducedresno);
1021                 maxlogstep_x = FFMAX(maxlogstep_x, rlevel->log2_prec_width  + reducedresno);
1022                 maxlogstep_y = FFMAX(maxlogstep_y, rlevel->log2_prec_height + reducedresno);
1023             }
1024             step_x = 1<<step_x;
1025             step_y = 1<<step_y;
1026
1027             start_y = comp->coord_o[1][0] >> maxlogstep_y << maxlogstep_y;
1028             start_x = comp->coord_o[0][0] >> maxlogstep_x << maxlogstep_x;
1029             for (y = start_y; y < comp->coord_o[1][1]; y += step_y) {
1030                 for (x = start_x; x < comp->coord_o[0][1]; x += step_x) {
1031                     for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
1032                         unsigned prcx, prcy;
1033                         uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; //  ==> N_L - r
1034                         Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
1035
1036                         if (y % (1 << (rlevel->log2_prec_height + reducedresno)))
1037                             continue;
1038
1039                         if (x % (1 << (rlevel->log2_prec_width + reducedresno)))
1040                             continue;
1041
1042                         // check if a precinct exists
1043                         prcx   = ff_jpeg2000_ceildivpow2(x, reducedresno) >> rlevel->log2_prec_width;
1044                         prcy   = ff_jpeg2000_ceildivpow2(y, reducedresno) >> rlevel->log2_prec_height;
1045                         prcx  -= ff_jpeg2000_ceildivpow2(comp->coord_o[0][0], reducedresno) >> rlevel->log2_prec_width;
1046                         prcy  -= ff_jpeg2000_ceildivpow2(comp->coord_o[1][0], reducedresno) >> rlevel->log2_prec_height;
1047
1048                         precno = prcx + rlevel->num_precincts_x * prcy;
1049
1050                         if (prcx >= rlevel->num_precincts_x || prcy >= rlevel->num_precincts_y) {
1051                             av_log(s->avctx, AV_LOG_WARNING, "prc %d %d outside limits %d %d\n",
1052                                    prcx, prcy, rlevel->num_precincts_x, rlevel->num_precincts_y);
1053                             continue;
1054                         }
1055
1056                         for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
1057                             if ((ret = jpeg2000_decode_packet(s, tile, &tp_index, codsty, rlevel,
1058                                                               precno, layno,
1059                                                               qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
1060                                                               qntsty->nguardbits)) < 0)
1061                                 return ret;
1062                         }
1063                     }
1064                 }
1065             }
1066         }
1067         break;
1068
1069     case JPEG2000_PGOD_RPCL:
1070         av_log(s->avctx, AV_LOG_WARNING, "Progression order RPCL\n");
1071         ok_reslevel = 1;
1072         for (reslevelno = 0; ok_reslevel; reslevelno++) {
1073             ok_reslevel = 0;
1074
1075             step_x = 32;
1076             step_y = 32;
1077             for (compno = 0; compno < s->ncomponents; compno++) {
1078                 Jpeg2000Component *comp     = tile->comp + compno;
1079                 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1080
1081                 if (reslevelno < codsty->nreslevels) {
1082                     uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; //  ==> N_L - r
1083                     Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
1084                     step_x = FFMIN(step_x, rlevel->log2_prec_width  + reducedresno);
1085                     step_y = FFMIN(step_y, rlevel->log2_prec_height + reducedresno);
1086                 }
1087             }
1088             step_x = 1<<step_x;
1089             step_y = 1<<step_y;
1090
1091             //FIXME we could iterate over less than the whole image
1092             for (y = 0; y < s->height; y += step_y) {
1093                 for (x = 0; x < s->width; x += step_x) {
1094                     for (compno = 0; compno < s->ncomponents; compno++) {
1095                         Jpeg2000Component *comp     = tile->comp + compno;
1096                         Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1097                         Jpeg2000QuantStyle *qntsty  = tile->qntsty + compno;
1098                         uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; //  ==> N_L - r
1099                         Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
1100                         unsigned prcx, prcy;
1101
1102                         int xc = x / s->cdx[compno];
1103                         int yc = y / s->cdy[compno];
1104
1105                         if (yc % (1 << (rlevel->log2_prec_height + reducedresno)))
1106                             continue;
1107
1108                         if (xc % (1 << (rlevel->log2_prec_width + reducedresno)))
1109                             continue;
1110
1111                         // check if a precinct exists
1112                         prcx   = ff_jpeg2000_ceildivpow2(xc, reducedresno) >> rlevel->log2_prec_width;
1113                         prcy   = ff_jpeg2000_ceildivpow2(yc, reducedresno) >> rlevel->log2_prec_height;
1114                         prcx  -= ff_jpeg2000_ceildivpow2(comp->coord_o[0][0], reducedresno) >> rlevel->log2_prec_width;
1115                         prcy  -= ff_jpeg2000_ceildivpow2(comp->coord_o[1][0], reducedresno) >> rlevel->log2_prec_height;
1116
1117                         precno = prcx + rlevel->num_precincts_x * prcy;
1118
1119                         if (prcx >= rlevel->num_precincts_x || prcy >= rlevel->num_precincts_y) {
1120                             av_log(s->avctx, AV_LOG_WARNING, "prc %d %d outside limits %d %d\n",
1121                                    prcx, prcy, rlevel->num_precincts_x, rlevel->num_precincts_y);
1122                             continue;
1123                         }
1124
1125                         if (reslevelno < codsty->nreslevels) {
1126                             Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel +
1127                                                     reslevelno;
1128                             ok_reslevel = 1;
1129                             for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
1130                                 if ((ret = jpeg2000_decode_packet(s, tile, &tp_index,
1131                                                                 codsty, rlevel,
1132                                                                 precno, layno,
1133                                                                 qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
1134                                                                 qntsty->nguardbits)) < 0)
1135                                     return ret;
1136                             }
1137                         }
1138                     }
1139                 }
1140             }
1141         }
1142         break;
1143
1144     case JPEG2000_PGOD_PCRL:
1145         av_log(s->avctx, AV_LOG_WARNING, "Progression order PCRL");
1146         step_x = 32;
1147         step_y = 32;
1148         for (compno = 0; compno < s->ncomponents; compno++) {
1149             Jpeg2000Component *comp     = tile->comp + compno;
1150             Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1151             Jpeg2000QuantStyle *qntsty  = tile->qntsty + compno;
1152
1153             for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
1154                 uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; //  ==> N_L - r
1155                 Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
1156                 step_x = FFMIN(step_x, rlevel->log2_prec_width  + reducedresno);
1157                 step_y = FFMIN(step_y, rlevel->log2_prec_height + reducedresno);
1158             }
1159         }
1160         step_x = 1<<step_x;
1161         step_y = 1<<step_y;
1162
1163         //FIXME we could iterate over less than the whole image
1164         for (y = 0; y < s->height; y += step_y) {
1165             for (x = 0; x < s->width; x += step_x) {
1166                 for (compno = 0; compno < s->ncomponents; compno++) {
1167                     Jpeg2000Component *comp     = tile->comp + compno;
1168                     Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1169                     Jpeg2000QuantStyle *qntsty  = tile->qntsty + compno;
1170                     int xc = x / s->cdx[compno];
1171                     int yc = y / s->cdy[compno];
1172
1173                     for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
1174                         unsigned prcx, prcy;
1175                         uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; //  ==> N_L - r
1176                         Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
1177
1178                         if (yc % (1 << (rlevel->log2_prec_height + reducedresno)))
1179                             continue;
1180
1181                         if (xc % (1 << (rlevel->log2_prec_width + reducedresno)))
1182                             continue;
1183
1184                         // check if a precinct exists
1185                         prcx   = ff_jpeg2000_ceildivpow2(xc, reducedresno) >> rlevel->log2_prec_width;
1186                         prcy   = ff_jpeg2000_ceildivpow2(yc, reducedresno) >> rlevel->log2_prec_height;
1187                         prcx  -= ff_jpeg2000_ceildivpow2(comp->coord_o[0][0], reducedresno) >> rlevel->log2_prec_width;
1188                         prcy  -= ff_jpeg2000_ceildivpow2(comp->coord_o[1][0], reducedresno) >> rlevel->log2_prec_height;
1189
1190                         precno = prcx + rlevel->num_precincts_x * prcy;
1191
1192                         if (prcx >= rlevel->num_precincts_x || prcy >= rlevel->num_precincts_y) {
1193                             av_log(s->avctx, AV_LOG_WARNING, "prc %d %d outside limits %d %d\n",
1194                                    prcx, prcy, rlevel->num_precincts_x, rlevel->num_precincts_y);
1195                             continue;
1196                         }
1197
1198                         for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
1199                             if ((ret = jpeg2000_decode_packet(s, tile, &tp_index, codsty, rlevel,
1200                                                               precno, layno,
1201                                                               qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
1202                                                               qntsty->nguardbits)) < 0)
1203                                 return ret;
1204                         }
1205                     }
1206                 }
1207             }
1208         }
1209         break;
1210
1211     default:
1212         break;
1213     }
1214
1215     /* EOC marker reached */
1216     bytestream2_skip(&s->g, 2);
1217
1218     return ret;
1219 }
1220
1221 /* TIER-1 routines */
1222 static void decode_sigpass(Jpeg2000T1Context *t1, int width, int height,
1223                            int bpno, int bandno,
1224                            int vert_causal_ctx_csty_symbol)
1225 {
1226     int mask = 3 << (bpno - 1), y0, x, y;
1227
1228     for (y0 = 0; y0 < height; y0 += 4)
1229         for (x = 0; x < width; x++)
1230             for (y = y0; y < height && y < y0 + 4; y++) {
1231                 if ((t1->flags[y+1][x+1] & JPEG2000_T1_SIG_NB)
1232                 && !(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {
1233                     int flags_mask = -1;
1234                     if (vert_causal_ctx_csty_symbol && y == y0 + 3)
1235                         flags_mask &= ~(JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_SW | JPEG2000_T1_SIG_SE);
1236                     if (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1] & flags_mask, bandno))) {
1237                         int xorbit, ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y+1][x+1], &xorbit);
1238                         if (t1->mqc.raw)
1239                              t1->data[y][x] = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ? -mask : mask;
1240                         else
1241                              t1->data[y][x] = (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ^ xorbit) ?
1242                                                -mask : mask;
1243
1244                         ff_jpeg2000_set_significance(t1, x, y,
1245                                                      t1->data[y][x] < 0);
1246                     }
1247                     t1->flags[y + 1][x + 1] |= JPEG2000_T1_VIS;
1248                 }
1249             }
1250 }
1251
1252 static void decode_refpass(Jpeg2000T1Context *t1, int width, int height,
1253                            int bpno)
1254 {
1255     int phalf, nhalf;
1256     int y0, x, y;
1257
1258     phalf = 1 << (bpno - 1);
1259     nhalf = -phalf;
1260
1261     for (y0 = 0; y0 < height; y0 += 4)
1262         for (x = 0; x < width; x++)
1263             for (y = y0; y < height && y < y0 + 4; y++)
1264                 if ((t1->flags[y + 1][x + 1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS)) == JPEG2000_T1_SIG) {
1265                     int ctxno = ff_jpeg2000_getrefctxno(t1->flags[y + 1][x + 1]);
1266                     int r     = ff_mqc_decode(&t1->mqc,
1267                                               t1->mqc.cx_states + ctxno)
1268                                 ? phalf : nhalf;
1269                     t1->data[y][x]          += t1->data[y][x] < 0 ? -r : r;
1270                     t1->flags[y + 1][x + 1] |= JPEG2000_T1_REF;
1271                 }
1272 }
1273
1274 static void decode_clnpass(Jpeg2000DecoderContext *s, Jpeg2000T1Context *t1,
1275                            int width, int height, int bpno, int bandno,
1276                            int seg_symbols, int vert_causal_ctx_csty_symbol)
1277 {
1278     int mask = 3 << (bpno - 1), y0, x, y, runlen, dec;
1279
1280     for (y0 = 0; y0 < height; y0 += 4) {
1281         for (x = 0; x < width; x++) {
1282             if (y0 + 3 < height &&
1283                 !((t1->flags[y0 + 1][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
1284                   (t1->flags[y0 + 2][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
1285                   (t1->flags[y0 + 3][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
1286                   (t1->flags[y0 + 4][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)))) {
1287                 if (!ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_RL))
1288                     continue;
1289                 runlen = ff_mqc_decode(&t1->mqc,
1290                                        t1->mqc.cx_states + MQC_CX_UNI);
1291                 runlen = (runlen << 1) | ff_mqc_decode(&t1->mqc,
1292                                                        t1->mqc.cx_states +
1293                                                        MQC_CX_UNI);
1294                 dec = 1;
1295             } else {
1296                 runlen = 0;
1297                 dec    = 0;
1298             }
1299
1300             for (y = y0 + runlen; y < y0 + 4 && y < height; y++) {
1301                 if (!dec) {
1302                     if (!(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {
1303                         int flags_mask = -1;
1304                         if (vert_causal_ctx_csty_symbol && y == y0 + 3)
1305                             flags_mask &= ~(JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_SW | JPEG2000_T1_SIG_SE);
1306                         dec = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1] & flags_mask,
1307                                                                                              bandno));
1308                     }
1309                 }
1310                 if (dec) {
1311                     int xorbit;
1312                     int ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y + 1][x + 1],
1313                                                         &xorbit);
1314                     t1->data[y][x] = (ff_mqc_decode(&t1->mqc,
1315                                                     t1->mqc.cx_states + ctxno) ^
1316                                       xorbit)
1317                                      ? -mask : mask;
1318                     ff_jpeg2000_set_significance(t1, x, y, t1->data[y][x] < 0);
1319                 }
1320                 dec = 0;
1321                 t1->flags[y + 1][x + 1] &= ~JPEG2000_T1_VIS;
1322             }
1323         }
1324     }
1325     if (seg_symbols) {
1326         int val;
1327         val = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
1328         val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
1329         val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
1330         val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
1331         if (val != 0xa)
1332             av_log(s->avctx, AV_LOG_ERROR,
1333                    "Segmentation symbol value incorrect\n");
1334     }
1335 }
1336
1337 static int decode_cblk(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty,
1338                        Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk,
1339                        int width, int height, int bandpos)
1340 {
1341     int passno = cblk->npasses, pass_t = 2, bpno = cblk->nonzerobits - 1, y;
1342     int pass_cnt = 0;
1343     int vert_causal_ctx_csty_symbol = codsty->cblk_style & JPEG2000_CBLK_VSC;
1344     int term_cnt = 0;
1345     int coder_type;
1346
1347     av_assert0(width  <= JPEG2000_MAX_CBLKW);
1348     av_assert0(height <= JPEG2000_MAX_CBLKH);
1349
1350     for (y = 0; y < height; y++)
1351         memset(t1->data[y], 0, width * sizeof(**t1->data));
1352
1353     /* If code-block contains no compressed data: nothing to do. */
1354     if (!cblk->length)
1355         return 0;
1356
1357     for (y = 0; y < height + 2; y++)
1358         memset(t1->flags[y], 0, (width + 2) * sizeof(**t1->flags));
1359
1360     cblk->data[cblk->length] = 0xff;
1361     cblk->data[cblk->length+1] = 0xff;
1362     ff_mqc_initdec(&t1->mqc, cblk->data, 0, 1);
1363
1364     while (passno--) {
1365         switch(pass_t) {
1366         case 0:
1367             decode_sigpass(t1, width, height, bpno + 1, bandpos,
1368                            vert_causal_ctx_csty_symbol);
1369             break;
1370         case 1:
1371             decode_refpass(t1, width, height, bpno + 1);
1372             break;
1373         case 2:
1374             av_assert2(!t1->mqc.raw);
1375             decode_clnpass(s, t1, width, height, bpno + 1, bandpos,
1376                            codsty->cblk_style & JPEG2000_CBLK_SEGSYM,
1377                            vert_causal_ctx_csty_symbol);
1378             break;
1379         }
1380         if (codsty->cblk_style & JPEG2000_CBLK_RESET) // XXX no testcase for just this
1381             ff_mqc_init_contexts(&t1->mqc);
1382
1383         if ((coder_type = needs_termination(codsty->cblk_style, pass_cnt))) {
1384             if (term_cnt >= cblk->nb_terminations) {
1385                 av_log(s->avctx, AV_LOG_ERROR, "Missing needed termination \n");
1386                 return AVERROR_INVALIDDATA;
1387             }
1388             ff_mqc_initdec(&t1->mqc, cblk->data + cblk->data_start[++term_cnt], coder_type == 2, 0);
1389         }
1390
1391         pass_t++;
1392         if (pass_t == 3) {
1393             bpno--;
1394             pass_t = 0;
1395         }
1396         pass_cnt ++;
1397     }
1398
1399     if (cblk->data + cblk->length != t1->mqc.bp) {
1400         av_log(s->avctx, AV_LOG_WARNING, "End mismatch %"PTRDIFF_SPECIFIER"\n", cblk->data + cblk->length - t1->mqc.bp);
1401     }
1402
1403     return 0;
1404 }
1405
1406 /* TODO: Verify dequantization for lossless case
1407  * comp->data can be float or int
1408  * band->stepsize can be float or int
1409  * depending on the type of DWT transformation.
1410  * see ISO/IEC 15444-1:2002 A.6.1 */
1411
1412 /* Float dequantization of a codeblock.*/
1413 static void dequantization_float(int x, int y, Jpeg2000Cblk *cblk,
1414                                  Jpeg2000Component *comp,
1415                                  Jpeg2000T1Context *t1, Jpeg2000Band *band)
1416 {
1417     int i, j;
1418     int w = cblk->coord[0][1] - cblk->coord[0][0];
1419     for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) {
1420         float *datap = &comp->f_data[(comp->coord[0][1] - comp->coord[0][0]) * (y + j) + x];
1421         int *src = t1->data[j];
1422         for (i = 0; i < w; ++i)
1423             datap[i] = src[i] * band->f_stepsize;
1424     }
1425 }
1426
1427 /* Integer dequantization of a codeblock.*/
1428 static void dequantization_int(int x, int y, Jpeg2000Cblk *cblk,
1429                                Jpeg2000Component *comp,
1430                                Jpeg2000T1Context *t1, Jpeg2000Band *band)
1431 {
1432     int i, j;
1433     int w = cblk->coord[0][1] - cblk->coord[0][0];
1434     for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) {
1435         int32_t *datap = &comp->i_data[(comp->coord[0][1] - comp->coord[0][0]) * (y + j) + x];
1436         int *src = t1->data[j];
1437         for (i = 0; i < w; ++i)
1438             datap[i] = (src[i] * band->i_stepsize) / 32768;
1439     }
1440 }
1441
1442 static void dequantization_int_97(int x, int y, Jpeg2000Cblk *cblk,
1443                                Jpeg2000Component *comp,
1444                                Jpeg2000T1Context *t1, Jpeg2000Band *band)
1445 {
1446     int i, j;
1447     int w = cblk->coord[0][1] - cblk->coord[0][0];
1448     for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) {
1449         int32_t *datap = &comp->i_data[(comp->coord[0][1] - comp->coord[0][0]) * (y + j) + x];
1450         int *src = t1->data[j];
1451         for (i = 0; i < w; ++i)
1452             datap[i] = (src[i] * band->i_stepsize + (1<<14)) >> 15;
1453     }
1454 }
1455
1456 static inline void mct_decode(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
1457 {
1458     int i, csize = 1;
1459     void *src[3];
1460
1461     for (i = 1; i < 3; i++) {
1462         if (tile->codsty[0].transform != tile->codsty[i].transform) {
1463             av_log(s->avctx, AV_LOG_ERROR, "Transforms mismatch, MCT not supported\n");
1464             return;
1465         }
1466         if (memcmp(tile->comp[0].coord, tile->comp[i].coord, sizeof(tile->comp[0].coord))) {
1467             av_log(s->avctx, AV_LOG_ERROR, "Coords mismatch, MCT not supported\n");
1468             return;
1469         }
1470     }
1471
1472     for (i = 0; i < 3; i++)
1473         if (tile->codsty[0].transform == FF_DWT97)
1474             src[i] = tile->comp[i].f_data;
1475         else
1476             src[i] = tile->comp[i].i_data;
1477
1478     for (i = 0; i < 2; i++)
1479         csize *= tile->comp[0].coord[i][1] - tile->comp[0].coord[i][0];
1480
1481     s->dsp.mct_decode[tile->codsty[0].transform](src[0], src[1], src[2], csize);
1482 }
1483
1484 static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
1485                                 AVFrame *picture)
1486 {
1487     const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
1488     int compno, reslevelno, bandno;
1489     int x, y;
1490     int planar    = !!(pixdesc->flags & AV_PIX_FMT_FLAG_PLANAR);
1491     int pixelsize = planar ? 1 : pixdesc->nb_components;
1492
1493     uint8_t *line;
1494     Jpeg2000T1Context t1;
1495
1496     /* Loop on tile components */
1497     for (compno = 0; compno < s->ncomponents; compno++) {
1498         Jpeg2000Component *comp     = tile->comp + compno;
1499         Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1500
1501         /* Loop on resolution levels */
1502         for (reslevelno = 0; reslevelno < codsty->nreslevels2decode; reslevelno++) {
1503             Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
1504             /* Loop on bands */
1505             for (bandno = 0; bandno < rlevel->nbands; bandno++) {
1506                 int nb_precincts, precno;
1507                 Jpeg2000Band *band = rlevel->band + bandno;
1508                 int cblkno = 0, bandpos;
1509
1510                 bandpos = bandno + (reslevelno > 0);
1511
1512                 if (band->coord[0][0] == band->coord[0][1] ||
1513                     band->coord[1][0] == band->coord[1][1])
1514                     continue;
1515
1516                 nb_precincts = rlevel->num_precincts_x * rlevel->num_precincts_y;
1517                 /* Loop on precincts */
1518                 for (precno = 0; precno < nb_precincts; precno++) {
1519                     Jpeg2000Prec *prec = band->prec + precno;
1520
1521                     /* Loop on codeblocks */
1522                     for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) {
1523                         int x, y;
1524                         Jpeg2000Cblk *cblk = prec->cblk + cblkno;
1525                         decode_cblk(s, codsty, &t1, cblk,
1526                                     cblk->coord[0][1] - cblk->coord[0][0],
1527                                     cblk->coord[1][1] - cblk->coord[1][0],
1528                                     bandpos);
1529
1530                         x = cblk->coord[0][0] - band->coord[0][0];
1531                         y = cblk->coord[1][0] - band->coord[1][0];
1532
1533                         if (codsty->transform == FF_DWT97)
1534                             dequantization_float(x, y, cblk, comp, &t1, band);
1535                         else if (codsty->transform == FF_DWT97_INT)
1536                             dequantization_int_97(x, y, cblk, comp, &t1, band);
1537                         else
1538                             dequantization_int(x, y, cblk, comp, &t1, band);
1539                    } /* end cblk */
1540                 } /*end prec */
1541             } /* end band */
1542         } /* end reslevel */
1543
1544         /* inverse DWT */
1545         ff_dwt_decode(&comp->dwt, codsty->transform == FF_DWT97 ? (void*)comp->f_data : (void*)comp->i_data);
1546     } /*end comp */
1547
1548     /* inverse MCT transformation */
1549     if (tile->codsty[0].mct)
1550         mct_decode(s, tile);
1551
1552     if (s->cdef[0] < 0) {
1553         for (x = 0; x < s->ncomponents; x++)
1554             s->cdef[x] = x + 1;
1555         if ((s->ncomponents & 1) == 0)
1556             s->cdef[s->ncomponents-1] = 0;
1557     }
1558
1559     if (s->precision <= 8) {
1560         for (compno = 0; compno < s->ncomponents; compno++) {
1561             Jpeg2000Component *comp = tile->comp + compno;
1562             Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1563             float *datap = comp->f_data;
1564             int32_t *i_datap = comp->i_data;
1565             int cbps = s->cbps[compno];
1566             int w = tile->comp[compno].coord[0][1] - s->image_offset_x;
1567             int plane = 0;
1568
1569             if (planar)
1570                 plane = s->cdef[compno] ? s->cdef[compno]-1 : (s->ncomponents-1);
1571
1572
1573             y    = tile->comp[compno].coord[1][0] - s->image_offset_y;
1574             line = picture->data[plane] + y / s->cdy[compno] * picture->linesize[plane];
1575             for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y ++) {
1576                 uint8_t *dst;
1577
1578                 x   = tile->comp[compno].coord[0][0] - s->image_offset_x;
1579                 dst = line + x / s->cdx[compno] * pixelsize + compno*!planar;
1580
1581                 if (codsty->transform == FF_DWT97) {
1582                     for (; x < w; x ++) {
1583                         int val = lrintf(*datap) + (1 << (cbps - 1));
1584                         /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1585                         val = av_clip(val, 0, (1 << cbps) - 1);
1586                         *dst = val << (8 - cbps);
1587                         datap++;
1588                         dst += pixelsize;
1589                     }
1590                 } else {
1591                     for (; x < w; x ++) {
1592                         int val = *i_datap + (1 << (cbps - 1));
1593                         /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1594                         val = av_clip(val, 0, (1 << cbps) - 1);
1595                         *dst = val << (8 - cbps);
1596                         i_datap++;
1597                         dst += pixelsize;
1598                     }
1599                 }
1600                 line += picture->linesize[plane];
1601             }
1602         }
1603     } else {
1604         int precision = picture->format == AV_PIX_FMT_XYZ12 ||
1605                         picture->format == AV_PIX_FMT_RGB48 ||
1606                         picture->format == AV_PIX_FMT_RGBA64 ||
1607                         picture->format == AV_PIX_FMT_GRAY16 ? 16 : s->precision;
1608
1609         for (compno = 0; compno < s->ncomponents; compno++) {
1610             Jpeg2000Component *comp = tile->comp + compno;
1611             Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1612             float *datap = comp->f_data;
1613             int32_t *i_datap = comp->i_data;
1614             uint16_t *linel;
1615             int cbps = s->cbps[compno];
1616             int w = tile->comp[compno].coord[0][1] - s->image_offset_x;
1617             int plane = 0;
1618
1619             if (planar)
1620                 plane = s->cdef[compno] ? s->cdef[compno]-1 : (s->ncomponents-1);
1621
1622             y     = tile->comp[compno].coord[1][0] - s->image_offset_y;
1623             linel = (uint16_t *)picture->data[plane] + y / s->cdy[compno] * (picture->linesize[plane] >> 1);
1624             for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y ++) {
1625                 uint16_t *dst;
1626
1627                 x   = tile->comp[compno].coord[0][0] - s->image_offset_x;
1628                 dst = linel + (x / s->cdx[compno] * pixelsize + compno*!planar);
1629                 if (codsty->transform == FF_DWT97) {
1630                     for (; x < w; x ++) {
1631                         int  val = lrintf(*datap) + (1 << (cbps - 1));
1632                         /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1633                         val = av_clip(val, 0, (1 << cbps) - 1);
1634                         /* align 12 bit values in little-endian mode */
1635                         *dst = val << (precision - cbps);
1636                         datap++;
1637                         dst += pixelsize;
1638                     }
1639                 } else {
1640                     for (; x < w; x ++) {
1641                         int val = *i_datap + (1 << (cbps - 1));
1642                         /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1643                         val = av_clip(val, 0, (1 << cbps) - 1);
1644                         /* align 12 bit values in little-endian mode */
1645                         *dst = val << (precision - cbps);
1646                         i_datap++;
1647                         dst += pixelsize;
1648                     }
1649                 }
1650                 linel += picture->linesize[plane] >> 1;
1651             }
1652         }
1653     }
1654
1655     return 0;
1656 }
1657
1658 static void jpeg2000_dec_cleanup(Jpeg2000DecoderContext *s)
1659 {
1660     int tileno, compno;
1661     for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) {
1662         if (s->tile[tileno].comp) {
1663             for (compno = 0; compno < s->ncomponents; compno++) {
1664                 Jpeg2000Component *comp     = s->tile[tileno].comp   + compno;
1665                 Jpeg2000CodingStyle *codsty = s->tile[tileno].codsty + compno;
1666
1667                 ff_jpeg2000_cleanup(comp, codsty);
1668             }
1669             av_freep(&s->tile[tileno].comp);
1670         }
1671     }
1672     av_freep(&s->tile);
1673     memset(s->codsty, 0, sizeof(s->codsty));
1674     memset(s->qntsty, 0, sizeof(s->qntsty));
1675     s->numXtiles = s->numYtiles = 0;
1676 }
1677
1678 static int jpeg2000_read_main_headers(Jpeg2000DecoderContext *s)
1679 {
1680     Jpeg2000CodingStyle *codsty = s->codsty;
1681     Jpeg2000QuantStyle *qntsty  = s->qntsty;
1682     uint8_t *properties         = s->properties;
1683
1684     for (;;) {
1685         int len, ret = 0;
1686         uint16_t marker;
1687         int oldpos;
1688
1689         if (bytestream2_get_bytes_left(&s->g) < 2) {
1690             av_log(s->avctx, AV_LOG_ERROR, "Missing EOC\n");
1691             break;
1692         }
1693
1694         marker = bytestream2_get_be16u(&s->g);
1695         oldpos = bytestream2_tell(&s->g);
1696
1697         if (marker == JPEG2000_SOD) {
1698             Jpeg2000Tile *tile;
1699             Jpeg2000TilePart *tp;
1700
1701             if (!s->tile) {
1702                 av_log(s->avctx, AV_LOG_ERROR, "Missing SIZ\n");
1703                 return AVERROR_INVALIDDATA;
1704             }
1705             if (s->curtileno < 0) {
1706                 av_log(s->avctx, AV_LOG_ERROR, "Missing SOT\n");
1707                 return AVERROR_INVALIDDATA;
1708             }
1709
1710             tile = s->tile + s->curtileno;
1711             tp = tile->tile_part + tile->tp_idx;
1712             if (tp->tp_end < s->g.buffer) {
1713                 av_log(s->avctx, AV_LOG_ERROR, "Invalid tpend\n");
1714                 return AVERROR_INVALIDDATA;
1715             }
1716             bytestream2_init(&tp->tpg, s->g.buffer, tp->tp_end - s->g.buffer);
1717             bytestream2_skip(&s->g, tp->tp_end - s->g.buffer);
1718
1719             continue;
1720         }
1721         if (marker == JPEG2000_EOC)
1722             break;
1723
1724         len = bytestream2_get_be16(&s->g);
1725         if (len < 2 || bytestream2_get_bytes_left(&s->g) < len - 2) {
1726             av_log(s->avctx, AV_LOG_ERROR, "Invalid len %d left=%d\n", len, bytestream2_get_bytes_left(&s->g));
1727             return AVERROR_INVALIDDATA;
1728         }
1729
1730         switch (marker) {
1731         case JPEG2000_SIZ:
1732             ret = get_siz(s);
1733             if (!s->tile)
1734                 s->numXtiles = s->numYtiles = 0;
1735             break;
1736         case JPEG2000_COC:
1737             ret = get_coc(s, codsty, properties);
1738             break;
1739         case JPEG2000_COD:
1740             ret = get_cod(s, codsty, properties);
1741             break;
1742         case JPEG2000_QCC:
1743             ret = get_qcc(s, len, qntsty, properties);
1744             break;
1745         case JPEG2000_QCD:
1746             ret = get_qcd(s, len, qntsty, properties);
1747             break;
1748         case JPEG2000_SOT:
1749             if (!(ret = get_sot(s, len))) {
1750                 av_assert1(s->curtileno >= 0);
1751                 codsty = s->tile[s->curtileno].codsty;
1752                 qntsty = s->tile[s->curtileno].qntsty;
1753                 properties = s->tile[s->curtileno].properties;
1754             }
1755             break;
1756         case JPEG2000_COM:
1757             // the comment is ignored
1758             bytestream2_skip(&s->g, len - 2);
1759             break;
1760         case JPEG2000_TLM:
1761             // Tile-part lengths
1762             ret = get_tlm(s, len);
1763             break;
1764         case JPEG2000_PLT:
1765             // Packet length, tile-part header
1766             ret = get_plt(s, len);
1767             break;
1768         default:
1769             av_log(s->avctx, AV_LOG_ERROR,
1770                    "unsupported marker 0x%.4"PRIX16" at pos 0x%X\n",
1771                    marker, bytestream2_tell(&s->g) - 4);
1772             bytestream2_skip(&s->g, len - 2);
1773             break;
1774         }
1775         if (bytestream2_tell(&s->g) - oldpos != len || ret) {
1776             av_log(s->avctx, AV_LOG_ERROR,
1777                    "error during processing marker segment %.4"PRIx16"\n",
1778                    marker);
1779             return ret ? ret : -1;
1780         }
1781     }
1782     return 0;
1783 }
1784
1785 /* Read bit stream packets --> T2 operation. */
1786 static int jpeg2000_read_bitstream_packets(Jpeg2000DecoderContext *s)
1787 {
1788     int ret = 0;
1789     int tileno;
1790
1791     for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) {
1792         Jpeg2000Tile *tile = s->tile + tileno;
1793
1794         if ((ret = init_tile(s, tileno)) < 0)
1795             return ret;
1796
1797         s->g = tile->tile_part[0].tpg;
1798         if ((ret = jpeg2000_decode_packets(s, tile)) < 0)
1799             return ret;
1800     }
1801
1802     return 0;
1803 }
1804
1805 static int jp2_find_codestream(Jpeg2000DecoderContext *s)
1806 {
1807     uint32_t atom_size, atom, atom_end;
1808     int search_range = 10;
1809
1810     while (search_range
1811            &&
1812            bytestream2_get_bytes_left(&s->g) >= 8) {
1813         atom_size = bytestream2_get_be32u(&s->g);
1814         atom      = bytestream2_get_be32u(&s->g);
1815         atom_end  = bytestream2_tell(&s->g) + atom_size - 8;
1816
1817         if (atom == JP2_CODESTREAM)
1818             return 1;
1819
1820         if (bytestream2_get_bytes_left(&s->g) < atom_size || atom_end < atom_size)
1821             return 0;
1822
1823         if (atom == JP2_HEADER &&
1824                    atom_size >= 16) {
1825             uint32_t atom2_size, atom2, atom2_end;
1826             do {
1827                 atom2_size = bytestream2_get_be32u(&s->g);
1828                 atom2      = bytestream2_get_be32u(&s->g);
1829                 atom2_end  = bytestream2_tell(&s->g) + atom2_size - 8;
1830                 if (atom2_size < 8 || atom2_end > atom_end || atom2_end < atom2_size)
1831                     break;
1832                 if (atom2 == JP2_CODESTREAM) {
1833                     return 1;
1834                 } else if (atom2 == MKBETAG('c','o','l','r') && atom2_size >= 7) {
1835                     int method = bytestream2_get_byteu(&s->g);
1836                     bytestream2_skipu(&s->g, 2);
1837                     if (method == 1) {
1838                         s->colour_space = bytestream2_get_be32u(&s->g);
1839                     }
1840                 } else if (atom2 == MKBETAG('p','c','l','r') && atom2_size >= 6) {
1841                     int i, size, colour_count, colour_channels, colour_depth[3];
1842                     uint32_t r, g, b;
1843                     colour_count = bytestream2_get_be16u(&s->g);
1844                     colour_channels = bytestream2_get_byteu(&s->g);
1845                     // FIXME: Do not ignore channel_sign
1846                     colour_depth[0] = (bytestream2_get_byteu(&s->g) & 0x7f) + 1;
1847                     colour_depth[1] = (bytestream2_get_byteu(&s->g) & 0x7f) + 1;
1848                     colour_depth[2] = (bytestream2_get_byteu(&s->g) & 0x7f) + 1;
1849                     size = (colour_depth[0] + 7 >> 3) * colour_count +
1850                            (colour_depth[1] + 7 >> 3) * colour_count +
1851                            (colour_depth[2] + 7 >> 3) * colour_count;
1852                     if (colour_count > 256   ||
1853                         colour_channels != 3 ||
1854                         colour_depth[0] > 16 ||
1855                         colour_depth[1] > 16 ||
1856                         colour_depth[2] > 16 ||
1857                         atom2_size < size) {
1858                         avpriv_request_sample(s->avctx, "Unknown palette");
1859                         bytestream2_seek(&s->g, atom2_end, SEEK_SET);
1860                         continue;
1861                     }
1862                     s->pal8 = 1;
1863                     for (i = 0; i < colour_count; i++) {
1864                         if (colour_depth[0] <= 8) {
1865                             r = bytestream2_get_byteu(&s->g) << 8 - colour_depth[0];
1866                             r |= r >> colour_depth[0];
1867                         } else {
1868                             r = bytestream2_get_be16u(&s->g) >> colour_depth[0] - 8;
1869                         }
1870                         if (colour_depth[1] <= 8) {
1871                             g = bytestream2_get_byteu(&s->g) << 8 - colour_depth[1];
1872                             r |= r >> colour_depth[1];
1873                         } else {
1874                             g = bytestream2_get_be16u(&s->g) >> colour_depth[1] - 8;
1875                         }
1876                         if (colour_depth[2] <= 8) {
1877                             b = bytestream2_get_byteu(&s->g) << 8 - colour_depth[2];
1878                             r |= r >> colour_depth[2];
1879                         } else {
1880                             b = bytestream2_get_be16u(&s->g) >> colour_depth[2] - 8;
1881                         }
1882                         s->palette[i] = 0xffu << 24 | r << 16 | g << 8 | b;
1883                     }
1884                 } else if (atom2 == MKBETAG('c','d','e','f') && atom2_size >= 2) {
1885                     int n = bytestream2_get_be16u(&s->g);
1886                     for (; n>0; n--) {
1887                         int cn   = bytestream2_get_be16(&s->g);
1888                         int av_unused typ  = bytestream2_get_be16(&s->g);
1889                         int asoc = bytestream2_get_be16(&s->g);
1890                         if (cn < 4 && asoc < 4)
1891                             s->cdef[cn] = asoc;
1892                     }
1893                 }
1894                 bytestream2_seek(&s->g, atom2_end, SEEK_SET);
1895             } while (atom_end - atom2_end >= 8);
1896         } else {
1897             search_range--;
1898         }
1899         bytestream2_seek(&s->g, atom_end, SEEK_SET);
1900     }
1901
1902     return 0;
1903 }
1904
1905 static av_cold int jpeg2000_decode_init(AVCodecContext *avctx)
1906 {
1907     Jpeg2000DecoderContext *s = avctx->priv_data;
1908
1909     ff_jpeg2000dsp_init(&s->dsp);
1910
1911     return 0;
1912 }
1913
1914 static int jpeg2000_decode_frame(AVCodecContext *avctx, void *data,
1915                                  int *got_frame, AVPacket *avpkt)
1916 {
1917     Jpeg2000DecoderContext *s = avctx->priv_data;
1918     ThreadFrame frame = { .f = data };
1919     AVFrame *picture = data;
1920     int tileno, ret;
1921
1922     s->avctx     = avctx;
1923     bytestream2_init(&s->g, avpkt->data, avpkt->size);
1924     s->curtileno = -1;
1925     memset(s->cdef, -1, sizeof(s->cdef));
1926
1927     if (bytestream2_get_bytes_left(&s->g) < 2) {
1928         ret = AVERROR_INVALIDDATA;
1929         goto end;
1930     }
1931
1932     // check if the image is in jp2 format
1933     if (bytestream2_get_bytes_left(&s->g) >= 12 &&
1934        (bytestream2_get_be32u(&s->g) == 12) &&
1935        (bytestream2_get_be32u(&s->g) == JP2_SIG_TYPE) &&
1936        (bytestream2_get_be32u(&s->g) == JP2_SIG_VALUE)) {
1937         if (!jp2_find_codestream(s)) {
1938             av_log(avctx, AV_LOG_ERROR,
1939                    "Could not find Jpeg2000 codestream atom.\n");
1940             ret = AVERROR_INVALIDDATA;
1941             goto end;
1942         }
1943     } else {
1944         bytestream2_seek(&s->g, 0, SEEK_SET);
1945     }
1946
1947     while (bytestream2_get_bytes_left(&s->g) >= 3 && bytestream2_peek_be16(&s->g) != JPEG2000_SOC)
1948         bytestream2_skip(&s->g, 1);
1949
1950     if (bytestream2_get_be16u(&s->g) != JPEG2000_SOC) {
1951         av_log(avctx, AV_LOG_ERROR, "SOC marker not present\n");
1952         ret = AVERROR_INVALIDDATA;
1953         goto end;
1954     }
1955     if (ret = jpeg2000_read_main_headers(s))
1956         goto end;
1957
1958     /* get picture buffer */
1959     if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
1960         goto end;
1961     picture->pict_type = AV_PICTURE_TYPE_I;
1962     picture->key_frame = 1;
1963
1964     if (ret = jpeg2000_read_bitstream_packets(s))
1965         goto end;
1966
1967     for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++)
1968         if (ret = jpeg2000_decode_tile(s, s->tile + tileno, picture))
1969             goto end;
1970
1971     jpeg2000_dec_cleanup(s);
1972
1973     *got_frame = 1;
1974
1975     if (s->avctx->pix_fmt == AV_PIX_FMT_PAL8)
1976         memcpy(picture->data[1], s->palette, 256 * sizeof(uint32_t));
1977
1978     return bytestream2_tell(&s->g);
1979
1980 end:
1981     jpeg2000_dec_cleanup(s);
1982     return ret;
1983 }
1984
1985 static av_cold void jpeg2000_init_static_data(AVCodec *codec)
1986 {
1987     ff_jpeg2000_init_tier1_luts();
1988     ff_mqc_init_context_tables();
1989 }
1990
1991 #define OFFSET(x) offsetof(Jpeg2000DecoderContext, x)
1992 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1993
1994 static const AVOption options[] = {
1995     { "lowres",  "Lower the decoding resolution by a power of two",
1996         OFFSET(reduction_factor), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, JPEG2000_MAX_RESLEVELS - 1, VD },
1997     { NULL },
1998 };
1999
2000 static const AVProfile profiles[] = {
2001     { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0,  "JPEG 2000 codestream restriction 0"   },
2002     { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1,  "JPEG 2000 codestream restriction 1"   },
2003     { FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION, "JPEG 2000 no codestream restrictions" },
2004     { FF_PROFILE_JPEG2000_DCINEMA_2K,             "JPEG 2000 digital cinema 2K"          },
2005     { FF_PROFILE_JPEG2000_DCINEMA_4K,             "JPEG 2000 digital cinema 4K"          },
2006     { FF_PROFILE_UNKNOWN },
2007 };
2008
2009 static const AVClass jpeg2000_class = {
2010     .class_name = "jpeg2000",
2011     .item_name  = av_default_item_name,
2012     .option     = options,
2013     .version    = LIBAVUTIL_VERSION_INT,
2014 };
2015
2016 AVCodec ff_jpeg2000_decoder = {
2017     .name             = "jpeg2000",
2018     .long_name        = NULL_IF_CONFIG_SMALL("JPEG 2000"),
2019     .type             = AVMEDIA_TYPE_VIDEO,
2020     .id               = AV_CODEC_ID_JPEG2000,
2021     .capabilities     = CODEC_CAP_FRAME_THREADS,
2022     .priv_data_size   = sizeof(Jpeg2000DecoderContext),
2023     .init_static_data = jpeg2000_init_static_data,
2024     .init             = jpeg2000_decode_init,
2025     .decode           = jpeg2000_decode_frame,
2026     .priv_class       = &jpeg2000_class,
2027     .max_lowres       = 5,
2028     .profiles         = NULL_IF_CONFIG_SMALL(profiles)
2029 };