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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / j2kenc.c
CommitLineData
2ba45a60
DM		 1/*
2 * JPEG2000 image encoder
3 * Copyright (c) 2007 Kamil Nowosad
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22/**
23 * JPEG2000 image encoder
24 * @file
25 * @author Kamil Nowosad
26 */
27
28#include <float.h>
29#include "avcodec.h"
30#include "internal.h"
31#include "bytestream.h"
32#include "jpeg2000.h"
33#include "libavutil/common.h"
34
35#define NMSEDEC_BITS 7
36#define NMSEDEC_FRACBITS (NMSEDEC_BITS-1)
37#define WMSEDEC_SHIFT 13 ///< must be >= 13
38#define LAMBDA_SCALE (100000000LL << (WMSEDEC_SHIFT - 13))
39
40static int lut_nmsedec_ref [1<<NMSEDEC_BITS],
41 lut_nmsedec_ref0[1<<NMSEDEC_BITS],
42 lut_nmsedec_sig [1<<NMSEDEC_BITS],
43 lut_nmsedec_sig0[1<<NMSEDEC_BITS];
44
45static const int dwt_norms[2][4][10] = { // [dwt_type][band][rlevel] (multiplied by 10000)
46 {{10000, 19650, 41770, 84030, 169000, 338400, 676900, 1353000, 2706000, 5409000},
47 {20220, 39890, 83550, 170400, 342700, 686300, 1373000, 2746000, 5490000},
48 {20220, 39890, 83550, 170400, 342700, 686300, 1373000, 2746000, 5490000},
49 {20800, 38650, 83070, 171800, 347100, 695900, 1393000, 2786000, 5572000}},
50
51 {{10000, 15000, 27500, 53750, 106800, 213400, 426700, 853300, 1707000, 3413000},
52 {10380, 15920, 29190, 57030, 113300, 226400, 452500, 904800, 1809000},
53 {10380, 15920, 29190, 57030, 113300, 226400, 452500, 904800, 1809000},
54 { 7186, 9218, 15860, 30430, 60190, 120100, 240000, 479700, 959300}}
55};
56
57typedef struct {
58 Jpeg2000Component *comp;
59} Jpeg2000Tile;
60
61typedef struct {
62 AVCodecContext *avctx;
63 const AVFrame *picture;
64
65 int width, height; ///< image width and height
66 uint8_t cbps[4]; ///< bits per sample in particular components
67 int chroma_shift[2];
68 uint8_t planar;
69 int ncomponents;
70 int tile_width, tile_height; ///< tile size
71 int numXtiles, numYtiles;
72
73 uint8_t *buf_start;
74 uint8_t *buf;
75 uint8_t *buf_end;
76 int bit_index;
77
78 int64_t lambda;
79
80 Jpeg2000CodingStyle codsty;
81 Jpeg2000QuantStyle qntsty;
82
83 Jpeg2000Tile *tile;
84} Jpeg2000EncoderContext;
85
86
87/* debug */
88#if 0
89#undef ifprintf
90#undef printf
91
92static void nspaces(FILE *fd, int n)
93{
94 while(n--) putc(' ', fd);
95}
96
97static void printcomp(Jpeg2000Component *comp)
98{
99 int i;
100 for (i = 0; i < comp->y1 - comp->y0; i++)
101 ff_jpeg2000_printv(comp->i_data + i * (comp->x1 - comp->x0), comp->x1 - comp->x0);
102}
103
104static void dump(Jpeg2000EncoderContext *s, FILE *fd)
105{
106 int tileno, compno, reslevelno, bandno, precno;
107 fprintf(fd, "XSiz = %d, YSiz = %d, tile_width = %d, tile_height = %d\n"
108 "numXtiles = %d, numYtiles = %d, ncomponents = %d\n"
109 "tiles:\n",
110 s->width, s->height, s->tile_width, s->tile_height,
111 s->numXtiles, s->numYtiles, s->ncomponents);
112 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){
113 Jpeg2000Tile *tile = s->tile + tileno;
114 nspaces(fd, 2);
115 fprintf(fd, "tile %d:\n", tileno);
116 for(compno = 0; compno < s->ncomponents; compno++){
117 Jpeg2000Component *comp = tile->comp + compno;
118 nspaces(fd, 4);
119 fprintf(fd, "component %d:\n", compno);
120 nspaces(fd, 4);
121 fprintf(fd, "x0 = %d, x1 = %d, y0 = %d, y1 = %d\n",
122 comp->x0, comp->x1, comp->y0, comp->y1);
123 for(reslevelno = 0; reslevelno < s->nreslevels; reslevelno++){
124 Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno;
125 nspaces(fd, 6);
126 fprintf(fd, "reslevel %d:\n", reslevelno);
127 nspaces(fd, 6);
128 fprintf(fd, "x0 = %d, x1 = %d, y0 = %d, y1 = %d, nbands = %d\n",
129 reslevel->x0, reslevel->x1, reslevel->y0,
130 reslevel->y1, reslevel->nbands);
131 for(bandno = 0; bandno < reslevel->nbands; bandno++){
132 Jpeg2000Band *band = reslevel->band + bandno;
133 nspaces(fd, 8);
134 fprintf(fd, "band %d:\n", bandno);
135 nspaces(fd, 8);
136 fprintf(fd, "x0 = %d, x1 = %d, y0 = %d, y1 = %d,"
137 "codeblock_width = %d, codeblock_height = %d cblknx = %d cblkny = %d\n",
138 band->x0, band->x1,
139 band->y0, band->y1,
140 band->codeblock_width, band->codeblock_height,
141 band->cblknx, band->cblkny);
142 for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++){
143 Jpeg2000Prec *prec = band->prec + precno;
144 nspaces(fd, 10);
145 fprintf(fd, "prec %d:\n", precno);
146 nspaces(fd, 10);
147 fprintf(fd, "xi0 = %d, xi1 = %d, yi0 = %d, yi1 = %d\n",
148 prec->xi0, prec->xi1, prec->yi0, prec->yi1);
149 }
150 }
151 }
152 }
153 }
154}
155#endif
156
157/* bitstream routines */
158
159/** put n times val bit */
160static void put_bits(Jpeg2000EncoderContext *s, int val, int n) // TODO: optimize
161{
162 while (n-- > 0){
163 if (s->bit_index == 8)
164 {
165 s->bit_index = *s->buf == 0xff;
166 *(++s->buf) = 0;
167 }
168 *s->buf |= val << (7 - s->bit_index++);
169 }
170}
171
172/** put n least significant bits of a number num */
173static void put_num(Jpeg2000EncoderContext *s, int num, int n)
174{
175 while(--n >= 0)
176 put_bits(s, (num >> n) & 1, 1);
177}
178
179/** flush the bitstream */
180static void j2k_flush(Jpeg2000EncoderContext *s)
181{
182 if (s->bit_index){
183 s->bit_index = 0;
184 s->buf++;
185 }
186}
187
188/* tag tree routines */
189
190/** code the value stored in node */
191static void tag_tree_code(Jpeg2000EncoderContext *s, Jpeg2000TgtNode *node, int threshold)
192{
193 Jpeg2000TgtNode *stack[30];
194 int sp = 1, curval = 0;
195 stack[0] = node;
196
197 node = node->parent;
198 while(node){
199 if (node->vis){
200 curval = node->val;
201 break;
202 }
203 node->vis++;
204 stack[sp++] = node;
205 node = node->parent;
206 }
207 while(--sp >= 0){
208 if (stack[sp]->val >= threshold){
209 put_bits(s, 0, threshold - curval);
210 break;
211 }
212 put_bits(s, 0, stack[sp]->val - curval);
213 put_bits(s, 1, 1);
214 curval = stack[sp]->val;
215 }
216}
217
218/** update the value in node */
219static void tag_tree_update(Jpeg2000TgtNode *node)
220{
221 int lev = 0;
222 while (node->parent){
223 if (node->parent->val <= node->val)
224 break;
225 node->parent->val = node->val;
226 node = node->parent;
227 lev++;
228 }
229}
230
231static int put_siz(Jpeg2000EncoderContext *s)
232{
233 int i;
234
235 if (s->buf_end - s->buf < 40 + 3 * s->ncomponents)
236 return -1;
237
238 bytestream_put_be16(&s->buf, JPEG2000_SIZ);
239 bytestream_put_be16(&s->buf, 38 + 3 * s->ncomponents); // Lsiz
240 bytestream_put_be16(&s->buf, 0); // Rsiz
241 bytestream_put_be32(&s->buf, s->width); // width
242 bytestream_put_be32(&s->buf, s->height); // height
243 bytestream_put_be32(&s->buf, 0); // X0Siz
244 bytestream_put_be32(&s->buf, 0); // Y0Siz
245
246 bytestream_put_be32(&s->buf, s->tile_width); // XTSiz
247 bytestream_put_be32(&s->buf, s->tile_height); // YTSiz
248 bytestream_put_be32(&s->buf, 0); // XT0Siz
249 bytestream_put_be32(&s->buf, 0); // YT0Siz
250 bytestream_put_be16(&s->buf, s->ncomponents); // CSiz
251
252 for (i = 0; i < s->ncomponents; i++){ // Ssiz_i XRsiz_i, YRsiz_i
253 bytestream_put_byte(&s->buf, 7);
254 bytestream_put_byte(&s->buf, i?1<<s->chroma_shift[0]:1);
255 bytestream_put_byte(&s->buf, i?1<<s->chroma_shift[1]:1);
256 }
257 return 0;
258}
259
260static int put_cod(Jpeg2000EncoderContext *s)
261{
262 Jpeg2000CodingStyle *codsty = &s->codsty;
263
264 if (s->buf_end - s->buf < 14)
265 return -1;
266
267 bytestream_put_be16(&s->buf, JPEG2000_COD);
268 bytestream_put_be16(&s->buf, 12); // Lcod
269 bytestream_put_byte(&s->buf, 0); // Scod
270 // SGcod
271 bytestream_put_byte(&s->buf, 0); // progression level
272 bytestream_put_be16(&s->buf, 1); // num of layers
273 if(s->avctx->pix_fmt == AV_PIX_FMT_YUV444P){
274 bytestream_put_byte(&s->buf, 2); // ICT
275 }else{
276 bytestream_put_byte(&s->buf, 0); // unspecified
277 }
278 // SPcod
279 bytestream_put_byte(&s->buf, codsty->nreslevels - 1); // num of decomp. levels
280 bytestream_put_byte(&s->buf, codsty->log2_cblk_width-2); // cblk width
281 bytestream_put_byte(&s->buf, codsty->log2_cblk_height-2); // cblk height
282 bytestream_put_byte(&s->buf, 0); // cblk style
283 bytestream_put_byte(&s->buf, codsty->transform == FF_DWT53); // transformation
284 return 0;
285}
286
287static int put_qcd(Jpeg2000EncoderContext *s, int compno)
288{
289 int i, size;
290 Jpeg2000CodingStyle *codsty = &s->codsty;
291 Jpeg2000QuantStyle *qntsty = &s->qntsty;
292
293 if (qntsty->quantsty == JPEG2000_QSTY_NONE)
294 size = 4 + 3 * (codsty->nreslevels-1);
295 else // QSTY_SE
296 size = 5 + 6 * (codsty->nreslevels-1);
297
298 if (s->buf_end - s->buf < size + 2)
299 return -1;
300
301 bytestream_put_be16(&s->buf, JPEG2000_QCD);
302 bytestream_put_be16(&s->buf, size); // LQcd
303 bytestream_put_byte(&s->buf, (qntsty->nguardbits << 5) | qntsty->quantsty); // Sqcd
304 if (qntsty->quantsty == JPEG2000_QSTY_NONE)
305 for (i = 0; i < codsty->nreslevels * 3 - 2; i++)
306 bytestream_put_byte(&s->buf, qntsty->expn[i] << 3);
307 else // QSTY_SE
308 for (i = 0; i < codsty->nreslevels * 3 - 2; i++)
309 bytestream_put_be16(&s->buf, (qntsty->expn[i] << 11) | qntsty->mant[i]);
310 return 0;
311}
312
313static uint8_t *put_sot(Jpeg2000EncoderContext *s, int tileno)
314{
315 uint8_t *psotptr;
316
317 if (s->buf_end - s->buf < 12)
318 return NULL;
319
320 bytestream_put_be16(&s->buf, JPEG2000_SOT);
321 bytestream_put_be16(&s->buf, 10); // Lsot
322 bytestream_put_be16(&s->buf, tileno); // Isot
323
324 psotptr = s->buf;
325 bytestream_put_be32(&s->buf, 0); // Psot (filled in later)
326
327 bytestream_put_byte(&s->buf, 0); // TPsot
328 bytestream_put_byte(&s->buf, 1); // TNsot
329 return psotptr;
330}
331
332/**
333 * compute the sizes of tiles, resolution levels, bands, etc.
334 * allocate memory for them
335 * divide the input image into tile-components
336 */
337static int init_tiles(Jpeg2000EncoderContext *s)
338{
339 int tileno, tilex, tiley, compno;
340 Jpeg2000CodingStyle *codsty = &s->codsty;
341 Jpeg2000QuantStyle *qntsty = &s->qntsty;
342
343 s->numXtiles = ff_jpeg2000_ceildiv(s->width, s->tile_width);
344 s->numYtiles = ff_jpeg2000_ceildiv(s->height, s->tile_height);
345
346 s->tile = av_malloc_array(s->numXtiles, s->numYtiles * sizeof(Jpeg2000Tile));
347 if (!s->tile)
348 return AVERROR(ENOMEM);
349 for (tileno = 0, tiley = 0; tiley < s->numYtiles; tiley++)
350 for (tilex = 0; tilex < s->numXtiles; tilex++, tileno++){
351 Jpeg2000Tile *tile = s->tile + tileno;
352
353 tile->comp = av_mallocz_array(s->ncomponents, sizeof(Jpeg2000Component));
354 if (!tile->comp)
355 return AVERROR(ENOMEM);
356 for (compno = 0; compno < s->ncomponents; compno++){
357 Jpeg2000Component *comp = tile->comp + compno;
358 int ret, i, j;
359
360 comp->coord[0][0] = comp->coord_o[0][0] = tilex * s->tile_width;
361 comp->coord[0][1] = comp->coord_o[0][1] = FFMIN((tilex+1)*s->tile_width, s->width);
362 comp->coord[1][0] = comp->coord_o[1][0] = tiley * s->tile_height;
363 comp->coord[1][1] = comp->coord_o[1][1] = FFMIN((tiley+1)*s->tile_height, s->height);
364 if (compno > 0)
365 for (i = 0; i < 2; i++)
366 for (j = 0; j < 2; j++)
367 comp->coord[i][j] = comp->coord_o[i][j] = ff_jpeg2000_ceildivpow2(comp->coord[i][j], s->chroma_shift[i]);
368
369 if (ret = ff_jpeg2000_init_component(comp,
370 codsty,
371 qntsty,
372 s->cbps[compno],
373 compno?1<<s->chroma_shift[0]:1,
374 compno?1<<s->chroma_shift[1]:1,
375 s->avctx
376 ))
377 return ret;
378 }
379 }
380 return 0;
381}
382
383static void copy_frame(Jpeg2000EncoderContext *s)
384{
385 int tileno, compno, i, y, x;
386 uint8_t *line;
387 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){
388 Jpeg2000Tile *tile = s->tile + tileno;
389 if (s->planar){
390 for (compno = 0; compno < s->ncomponents; compno++){
391 Jpeg2000Component *comp = tile->comp + compno;
392 int *dst = comp->i_data;
393 line = s->picture->data[compno]
394 + comp->coord[1][0] * s->picture->linesize[compno]
395 + comp->coord[0][0];
396 for (y = comp->coord[1][0]; y < comp->coord[1][1]; y++){
397 uint8_t *ptr = line;
398 for (x = comp->coord[0][0]; x < comp->coord[0][1]; x++)
399 *dst++ = *ptr++ - (1 << 7);
400 line += s->picture->linesize[compno];
401 }
402 }
403 } else{
404 line = s->picture->data[0] + tile->comp[0].coord[1][0] * s->picture->linesize[0]
405 + tile->comp[0].coord[0][0] * s->ncomponents;
406
407 i = 0;
408 for (y = tile->comp[0].coord[1][0]; y < tile->comp[0].coord[1][1]; y++){
409 uint8_t *ptr = line;
410 for (x = tile->comp[0].coord[0][0]; x < tile->comp[0].coord[0][1]; x++, i++){
411 for (compno = 0; compno < s->ncomponents; compno++){
412 tile->comp[compno].i_data[i] = *ptr++ - (1 << 7);
413 }
414 }
415 line += s->picture->linesize[0];
416 }
417 }
418 }
419}
420
421static void init_quantization(Jpeg2000EncoderContext *s)
422{
423 int compno, reslevelno, bandno;
424 Jpeg2000QuantStyle *qntsty = &s->qntsty;
425 Jpeg2000CodingStyle *codsty = &s->codsty;
426
427 for (compno = 0; compno < s->ncomponents; compno++){
428 int gbandno = 0;
429 for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++){
430 int nbands, lev = codsty->nreslevels - reslevelno - 1;
431 nbands = reslevelno ? 3 : 1;
432 for (bandno = 0; bandno < nbands; bandno++, gbandno++){
433 int expn, mant;
434
435 if (codsty->transform == FF_DWT97_INT){
436 int bandpos = bandno + (reslevelno>0),
437 ss = 81920000 / dwt_norms[0][bandpos][lev],
438 log = av_log2(ss);
439 mant = (11 - log < 0 ? ss >> log - 11 : ss << 11 - log) & 0x7ff;
440 expn = s->cbps[compno] - log + 13;
441 } else
442 expn = ((bandno&2)>>1) + (reslevelno>0) + s->cbps[compno];
443
444 qntsty->expn[gbandno] = expn;
445 qntsty->mant[gbandno] = mant;
446 }
447 }
448 }
449}
450
451static void init_luts(void)
452{
453 int i, a,
454 mask = ~((1<<NMSEDEC_FRACBITS)-1);
455
456 for (i = 0; i < (1 << NMSEDEC_BITS); i++){
457 lut_nmsedec_sig[i] = FFMAX(6*i - (9<<NMSEDEC_FRACBITS-1) << 12-NMSEDEC_FRACBITS, 0);
458 lut_nmsedec_sig0[i] = FFMAX((i*i + (1<<NMSEDEC_FRACBITS-1) & mask) << 1, 0);
459
460 a = (i >> (NMSEDEC_BITS-2)&2) + 1;
461 lut_nmsedec_ref[i] = FFMAX((-2*i + (1<<NMSEDEC_FRACBITS) + a*i - (a*a<<NMSEDEC_FRACBITS-2))
462 << 13-NMSEDEC_FRACBITS, 0);
463 lut_nmsedec_ref0[i] = FFMAX(((i*i + (1-4*i << NMSEDEC_FRACBITS-1) + (1<<2*NMSEDEC_FRACBITS)) & mask)
464 << 1, 0);
465 }
466}
467
468/* tier-1 routines */
469static int getnmsedec_sig(int x, int bpno)
470{
471 if (bpno > NMSEDEC_FRACBITS)
472 return lut_nmsedec_sig[(x >> (bpno - NMSEDEC_FRACBITS)) & ((1 << NMSEDEC_BITS) - 1)];
473 return lut_nmsedec_sig0[x & ((1 << NMSEDEC_BITS) - 1)];
474}
475
476static int getnmsedec_ref(int x, int bpno)
477{
478 if (bpno > NMSEDEC_FRACBITS)
479 return lut_nmsedec_ref[(x >> (bpno - NMSEDEC_FRACBITS)) & ((1 << NMSEDEC_BITS) - 1)];
480 return lut_nmsedec_ref0[x & ((1 << NMSEDEC_BITS) - 1)];
481}
482
483static void encode_sigpass(Jpeg2000T1Context *t1, int width, int height, int bandno, int *nmsedec, int bpno)
484{
485 int y0, x, y, mask = 1 << (bpno + NMSEDEC_FRACBITS);
486 for (y0 = 0; y0 < height; y0 += 4)
487 for (x = 0; x < width; x++)
488 for (y = y0; y < height && y < y0+4; y++){
489 if (!(t1->flags[y+1][x+1] & JPEG2000_T1_SIG) && (t1->flags[y+1][x+1] & JPEG2000_T1_SIG_NB)){
490 int ctxno = ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1], bandno),
491 bit = t1->data[y][x] & mask ? 1 : 0;
492 ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + ctxno, bit);
493 if (bit){
494 int xorbit;
495 int ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y+1][x+1], &xorbit);
496 ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + ctxno, (t1->flags[y+1][x+1] >> 15) ^ xorbit);
497 *nmsedec += getnmsedec_sig(t1->data[y][x], bpno + NMSEDEC_FRACBITS);
498 ff_jpeg2000_set_significance(t1, x, y, t1->flags[y+1][x+1] >> 15);
499 }
500 t1->flags[y+1][x+1] |= JPEG2000_T1_VIS;
501 }
502 }
503}
504
505static void encode_refpass(Jpeg2000T1Context *t1, int width, int height, int *nmsedec, int bpno)
506{
507 int y0, x, y, mask = 1 << (bpno + NMSEDEC_FRACBITS);
508 for (y0 = 0; y0 < height; y0 += 4)
509 for (x = 0; x < width; x++)
510 for (y = y0; y < height && y < y0+4; y++)
511 if ((t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS)) == JPEG2000_T1_SIG){
512 int ctxno = ff_jpeg2000_getrefctxno(t1->flags[y+1][x+1]);
513 *nmsedec += getnmsedec_ref(t1->data[y][x], bpno + NMSEDEC_FRACBITS);
514 ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + ctxno, t1->data[y][x] & mask ? 1:0);
515 t1->flags[y+1][x+1] |= JPEG2000_T1_REF;
516 }
517}
518
519static void encode_clnpass(Jpeg2000T1Context *t1, int width, int height, int bandno, int *nmsedec, int bpno)
520{
521 int y0, x, y, mask = 1 << (bpno + NMSEDEC_FRACBITS);
522 for (y0 = 0; y0 < height; y0 += 4)
523 for (x = 0; x < width; x++){
524 if (y0 + 3 < height && !(
525 (t1->flags[y0+1][x+1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
526 (t1->flags[y0+2][x+1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
527 (t1->flags[y0+3][x+1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
528 (t1->flags[y0+4][x+1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG))))
529 {
530 // aggregation mode
531 int rlen;
532 for (rlen = 0; rlen < 4; rlen++)
533 if (t1->data[y0+rlen][x] & mask)
534 break;
535 ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + MQC_CX_RL, rlen != 4);
536 if (rlen == 4)
537 continue;
538 ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI, rlen >> 1);
539 ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI, rlen & 1);
540 for (y = y0 + rlen; y < y0 + 4; y++){
541 if (!(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))){
542 int ctxno = ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1], bandno);
543 if (y > y0 + rlen)
544 ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + ctxno, t1->data[y][x] & mask ? 1:0);
545 if (t1->data[y][x] & mask){ // newly significant
546 int xorbit;
547 int ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y+1][x+1], &xorbit);
548 *nmsedec += getnmsedec_sig(t1->data[y][x], bpno + NMSEDEC_FRACBITS);
549 ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + ctxno, (t1->flags[y+1][x+1] >> 15) ^ xorbit);
550 ff_jpeg2000_set_significance(t1, x, y, t1->flags[y+1][x+1] >> 15);
551 }
552 }
553 t1->flags[y+1][x+1] &= ~JPEG2000_T1_VIS;
554 }
555 } else{
556 for (y = y0; y < y0 + 4 && y < height; y++){
557 if (!(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))){
558 int ctxno = ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1], bandno);
559 ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + ctxno, t1->data[y][x] & mask ? 1:0);
560 if (t1->data[y][x] & mask){ // newly significant
561 int xorbit;
562 int ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y+1][x+1], &xorbit);
563 *nmsedec += getnmsedec_sig(t1->data[y][x], bpno + NMSEDEC_FRACBITS);
564 ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + ctxno, (t1->flags[y+1][x+1] >> 15) ^ xorbit);
565 ff_jpeg2000_set_significance(t1, x, y, t1->flags[y+1][x+1] >> 15);
566 }
567 }
568 t1->flags[y+1][x+1] &= ~JPEG2000_T1_VIS;
569 }
570 }
571 }
572}
573
574static void encode_cblk(Jpeg2000EncoderContext *s, Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk, Jpeg2000Tile *tile,
575 int width, int height, int bandpos, int lev)
576{
577 int pass_t = 2, passno, x, y, max=0, nmsedec, bpno;
578 int64_t wmsedec = 0;
579
580 for (y = 0; y < height+2; y++)
581 memset(t1->flags[y], 0, (width+2)*sizeof(int));
582
583 for (y = 0; y < height; y++){
584 for (x = 0; x < width; x++){
585 if (t1->data[y][x] < 0){
586 t1->flags[y+1][x+1] |= JPEG2000_T1_SGN;
587 t1->data[y][x] = -t1->data[y][x];
588 }
589 max = FFMAX(max, t1->data[y][x]);
590 }
591 }
592
593 if (max == 0){
594 cblk->nonzerobits = 0;
595 bpno = 0;
596 } else{
597 cblk->nonzerobits = av_log2(max) + 1 - NMSEDEC_FRACBITS;
598 bpno = cblk->nonzerobits - 1;
599 }
600
601 ff_mqc_initenc(&t1->mqc, cblk->data);
602
603 for (passno = 0; bpno >= 0; passno++){
604 nmsedec=0;
605
606 switch(pass_t){
607 case 0: encode_sigpass(t1, width, height, bandpos, &nmsedec, bpno);
608 break;
609 case 1: encode_refpass(t1, width, height, &nmsedec, bpno);
610 break;
611 case 2: encode_clnpass(t1, width, height, bandpos, &nmsedec, bpno);
612 break;
613 }
614
615 cblk->passes[passno].rate = 3 + ff_mqc_length(&t1->mqc);
616 wmsedec += (int64_t)nmsedec << (2*bpno);
617 cblk->passes[passno].disto = wmsedec;
618
619 if (++pass_t == 3){
620 pass_t = 0;
621 bpno--;
622 }
623 }
624 cblk->npasses = passno;
625 cblk->ninclpasses = passno;
626
627 // TODO: optional flush on each pass
628 cblk->passes[passno-1].rate = ff_mqc_flush(&t1->mqc);
629}
630
631/* tier-2 routines: */
632
633static void putnumpasses(Jpeg2000EncoderContext *s, int n)
634{
635 if (n == 1)
636 put_num(s, 0, 1);
637 else if (n == 2)
638 put_num(s, 2, 2);
639 else if (n <= 5)
640 put_num(s, 0xc | (n-3), 4);
641 else if (n <= 36)
642 put_num(s, 0x1e0 | (n-6), 9);
643 else
644 put_num(s, 0xff80 | (n-37), 16);
645}
646
647
648static int encode_packet(Jpeg2000EncoderContext *s, Jpeg2000ResLevel *rlevel, int precno,
649 uint8_t *expn, int numgbits)
650{
651 int bandno, empty = 1;
652
653 // init bitstream
654 *s->buf = 0;
655 s->bit_index = 0;
656
657 // header
658
659 // is the packet empty?
660 for (bandno = 0; bandno < rlevel->nbands; bandno++){
661 if (rlevel->band[bandno].coord[0][0] < rlevel->band[bandno].coord[0][1]
662 && rlevel->band[bandno].coord[1][0] < rlevel->band[bandno].coord[1][1]){
663 empty = 0;
664 break;
665 }
666 }
667
668 put_bits(s, !empty, 1);
669 if (empty){
670 j2k_flush(s);
671 return 0;
672 }
673
674 for (bandno = 0; bandno < rlevel->nbands; bandno++){
675 Jpeg2000Band *band = rlevel->band + bandno;
676 Jpeg2000Prec *prec = band->prec + precno;
677 int yi, xi, pos;
678 int cblknw = prec->nb_codeblocks_width;
679
680 if (band->coord[0][0] == band->coord[0][1]
681 || band->coord[1][0] == band->coord[1][1])
682 continue;
683
684 for (pos=0, yi = 0; yi < prec->nb_codeblocks_height; yi++){
685 for (xi = 0; xi < cblknw; xi++, pos++){
686 prec->cblkincl[pos].val = prec->cblk[yi * cblknw + xi].ninclpasses == 0;
687 tag_tree_update(prec->cblkincl + pos);
688 prec->zerobits[pos].val = expn[bandno] + numgbits - 1 - prec->cblk[yi * cblknw + xi].nonzerobits;
689 tag_tree_update(prec->zerobits + pos);
690 }
691 }
692
693 for (pos=0, yi = 0; yi < prec->nb_codeblocks_height; yi++){
694 for (xi = 0; xi < cblknw; xi++, pos++){
695 int pad = 0, llen, length;
696 Jpeg2000Cblk *cblk = prec->cblk + yi * cblknw + xi;
697
698 if (s->buf_end - s->buf < 20) // approximately
699 return -1;
700
701 // inclusion information
702 tag_tree_code(s, prec->cblkincl + pos, 1);
703 if (!cblk->ninclpasses)
704 continue;
705 // zerobits information
706 tag_tree_code(s, prec->zerobits + pos, 100);
707 // number of passes
708 putnumpasses(s, cblk->ninclpasses);
709
710 length = cblk->passes[cblk->ninclpasses-1].rate;
711 llen = av_log2(length) - av_log2(cblk->ninclpasses) - 2;
712 if (llen < 0){
713 pad = -llen;
714 llen = 0;
715 }
716 // length of code block
717 put_bits(s, 1, llen);
718 put_bits(s, 0, 1);
719 put_num(s, length, av_log2(length)+1+pad);
720 }
721 }
722 }
723 j2k_flush(s);
724 for (bandno = 0; bandno < rlevel->nbands; bandno++){
725 Jpeg2000Band *band = rlevel->band + bandno;
726 Jpeg2000Prec *prec = band->prec + precno;
727 int yi, cblknw = prec->nb_codeblocks_width;
728 for (yi =0; yi < prec->nb_codeblocks_height; yi++){
729 int xi;
730 for (xi = 0; xi < cblknw; xi++){
731 Jpeg2000Cblk *cblk = prec->cblk + yi * cblknw + xi;
732 if (cblk->ninclpasses){
733 if (s->buf_end - s->buf < cblk->passes[cblk->ninclpasses-1].rate)
734 return -1;
735 bytestream_put_buffer(&s->buf, cblk->data, cblk->passes[cblk->ninclpasses-1].rate);
736 }
737 }
738 }
739 }
740 return 0;
741}
742
743static int encode_packets(Jpeg2000EncoderContext *s, Jpeg2000Tile *tile, int tileno)
744{
745 int compno, reslevelno, ret;
746 Jpeg2000CodingStyle *codsty = &s->codsty;
747 Jpeg2000QuantStyle *qntsty = &s->qntsty;
748
749 av_log(s->avctx, AV_LOG_DEBUG, "tier2\n");
750 // lay-rlevel-comp-pos progression
751 for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++){
752 for (compno = 0; compno < s->ncomponents; compno++){
753 int precno;
754 Jpeg2000ResLevel *reslevel = s->tile[tileno].comp[compno].reslevel + reslevelno;
755 for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++){
756 if (ret = encode_packet(s, reslevel, precno, qntsty->expn + (reslevelno ? 3*reslevelno-2 : 0),
757 qntsty->nguardbits))
758 return ret;
759 }
760 }
761 }
762 av_log(s->avctx, AV_LOG_DEBUG, "after tier2\n");
763 return 0;
764}
765
766static int getcut(Jpeg2000Cblk *cblk, int64_t lambda, int dwt_norm)
767{
768 int passno, res = 0;
769 for (passno = 0; passno < cblk->npasses; passno++){
770 int dr;
771 int64_t dd;
772
773 dr = cblk->passes[passno].rate
774 - (res ? cblk->passes[res-1].rate:0);
775 dd = cblk->passes[passno].disto
776 - (res ? cblk->passes[res-1].disto:0);
777
778 if (((dd * dwt_norm) >> WMSEDEC_SHIFT) * dwt_norm >= dr * lambda)
779 res = passno+1;
780 }
781 return res;
782}
783
784static void truncpasses(Jpeg2000EncoderContext *s, Jpeg2000Tile *tile)
785{
786 int precno, compno, reslevelno, bandno, cblkno, lev;
787 Jpeg2000CodingStyle *codsty = &s->codsty;
788
789 for (compno = 0; compno < s->ncomponents; compno++){
790 Jpeg2000Component *comp = tile->comp + compno;
791
792 for (reslevelno = 0, lev = codsty->nreslevels-1; reslevelno < codsty->nreslevels; reslevelno++, lev--){
793 Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno;
794
795 for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++){
796 for (bandno = 0; bandno < reslevel->nbands ; bandno++){
797 int bandpos = bandno + (reslevelno > 0);
798 Jpeg2000Band *band = reslevel->band + bandno;
799 Jpeg2000Prec *prec = band->prec + precno;
800
801 for (cblkno = 0; cblkno < prec->nb_codeblocks_height * prec->nb_codeblocks_width; cblkno++){
802 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
803
804 cblk->ninclpasses = getcut(cblk, s->lambda,
805 (int64_t)dwt_norms[codsty->transform == FF_DWT53][bandpos][lev] * (int64_t)band->i_stepsize >> 15);
806 }
807 }
808 }
809 }
810 }
811}
812
813static int encode_tile(Jpeg2000EncoderContext *s, Jpeg2000Tile *tile, int tileno)
814{
815 int compno, reslevelno, bandno, ret;
816 Jpeg2000T1Context t1;
817 Jpeg2000CodingStyle *codsty = &s->codsty;
818 for (compno = 0; compno < s->ncomponents; compno++){
819 Jpeg2000Component *comp = s->tile[tileno].comp + compno;
820
821 av_log(s->avctx, AV_LOG_DEBUG,"dwt\n");
822 if (ret = ff_dwt_encode(&comp->dwt, comp->i_data))
823 return ret;
824 av_log(s->avctx, AV_LOG_DEBUG,"after dwt -> tier1\n");
825
826 for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++){
827 Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno;
828
829 for (bandno = 0; bandno < reslevel->nbands ; bandno++){
830 Jpeg2000Band *band = reslevel->band + bandno;
831 Jpeg2000Prec *prec = band->prec; // we support only 1 precinct per band ATM in the encoder
832 int cblkx, cblky, cblkno=0, xx0, x0, xx1, y0, yy0, yy1, bandpos;
833 yy0 = bandno == 0 ? 0 : comp->reslevel[reslevelno-1].coord[1][1] - comp->reslevel[reslevelno-1].coord[1][0];
834 y0 = yy0;
835 yy1 = FFMIN(ff_jpeg2000_ceildivpow2(band->coord[1][0] + 1, band->log2_cblk_height) << band->log2_cblk_height,
836 band->coord[1][1]) - band->coord[1][0] + yy0;
837
838 if (band->coord[0][0] == band->coord[0][1] || band->coord[1][0] == band->coord[1][1])
839 continue;
840
841 bandpos = bandno + (reslevelno > 0);
842
843 for (cblky = 0; cblky < prec->nb_codeblocks_height; cblky++){
844 if (reslevelno == 0 || bandno == 1)
845 xx0 = 0;
846 else
847 xx0 = comp->reslevel[reslevelno-1].coord[0][1] - comp->reslevel[reslevelno-1].coord[0][0];
848 x0 = xx0;
849 xx1 = FFMIN(ff_jpeg2000_ceildivpow2(band->coord[0][0] + 1, band->log2_cblk_width) << band->log2_cblk_width,
850 band->coord[0][1]) - band->coord[0][0] + xx0;
851
852 for (cblkx = 0; cblkx < prec->nb_codeblocks_width; cblkx++, cblkno++){
853 int y, x;
854 if (codsty->transform == FF_DWT53){
855 for (y = yy0; y < yy1; y++){
856 int *ptr = t1.data[y-yy0];
857 for (x = xx0; x < xx1; x++){
858 *ptr++ = comp->i_data[(comp->coord[0][1] - comp->coord[0][0]) * y + x] << NMSEDEC_FRACBITS;
859 }
860 }
861 } else{
862 for (y = yy0; y < yy1; y++){
863 int *ptr = t1.data[y-yy0];
864 for (x = xx0; x < xx1; x++){
865 *ptr = (comp->i_data[(comp->coord[0][1] - comp->coord[0][0]) * y + x]);
866 *ptr = (int64_t)*ptr * (int64_t)(16384 * 65536 / band->i_stepsize) >> 15 - NMSEDEC_FRACBITS;
867 ptr++;
868 }
869 }
870 }
871 encode_cblk(s, &t1, prec->cblk + cblkno, tile, xx1 - xx0, yy1 - yy0,
872 bandpos, codsty->nreslevels - reslevelno - 1);
873 xx0 = xx1;
874 xx1 = FFMIN(xx1 + (1 << band->log2_cblk_width), band->coord[0][1] - band->coord[0][0] + x0);
875 }
876 yy0 = yy1;
877 yy1 = FFMIN(yy1 + (1 << band->log2_cblk_height), band->coord[1][1] - band->coord[1][0] + y0);
878 }
879 }
880 }
881 av_log(s->avctx, AV_LOG_DEBUG, "after tier1\n");
882 }
883
884 av_log(s->avctx, AV_LOG_DEBUG, "rate control\n");
885 truncpasses(s, tile);
886 if (ret = encode_packets(s, tile, tileno))
887 return ret;
888 av_log(s->avctx, AV_LOG_DEBUG, "after rate control\n");
889 return 0;
890}
891
892static void cleanup(Jpeg2000EncoderContext *s)
893{
894 int tileno, compno;
895 Jpeg2000CodingStyle *codsty = &s->codsty;
896
897 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){
898 for (compno = 0; compno < s->ncomponents; compno++){
899 Jpeg2000Component *comp = s->tile[tileno].comp + compno;
900 ff_jpeg2000_cleanup(comp, codsty);
901 }
902 av_freep(&s->tile[tileno].comp);
903 }
904 av_freep(&s->tile);
905}
906
907static void reinit(Jpeg2000EncoderContext *s)
908{
909 int tileno, compno;
910 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){
911 Jpeg2000Tile *tile = s->tile + tileno;
912 for (compno = 0; compno < s->ncomponents; compno++)
913 ff_jpeg2000_reinit(tile->comp + compno, &s->codsty);
914 }
915}
916
917static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
918 const AVFrame *pict, int *got_packet)
919{
920 int tileno, ret;
921 Jpeg2000EncoderContext *s = avctx->priv_data;
922
923 if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width*avctx->height*9 + FF_MIN_BUFFER_SIZE)) < 0)
924 return ret;
925
926 // init:
927 s->buf = s->buf_start = pkt->data;
928 s->buf_end = pkt->data + pkt->size;
929
930 s->picture = pict;
931
932 s->lambda = s->picture->quality * LAMBDA_SCALE;
933
934 copy_frame(s);
935 reinit(s);
936
937 if (s->buf_end - s->buf < 2)
938 return -1;
939 bytestream_put_be16(&s->buf, JPEG2000_SOC);
940 if (ret = put_siz(s))
941 return ret;
942 if (ret = put_cod(s))
943 return ret;
944 if (ret = put_qcd(s, 0))
945 return ret;
946
947 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){
948 uint8_t *psotptr;
949 if (!(psotptr = put_sot(s, tileno)))
950 return -1;
951 if (s->buf_end - s->buf < 2)
952 return -1;
953 bytestream_put_be16(&s->buf, JPEG2000_SOD);
954 if (ret = encode_tile(s, s->tile + tileno, tileno))
955 return ret;
956 bytestream_put_be32(&psotptr, s->buf - psotptr + 6);
957 }
958 if (s->buf_end - s->buf < 2)
959 return -1;
960 bytestream_put_be16(&s->buf, JPEG2000_EOC);
961
962 av_log(s->avctx, AV_LOG_DEBUG, "end\n");
963 pkt->size = s->buf - s->buf_start;
964 pkt->flags |= AV_PKT_FLAG_KEY;
965 *got_packet = 1;
966
967 return 0;
968}
969
970static av_cold int j2kenc_init(AVCodecContext *avctx)
971{
972 int i, ret;
973 Jpeg2000EncoderContext *s = avctx->priv_data;
974 Jpeg2000CodingStyle *codsty = &s->codsty;
975 Jpeg2000QuantStyle *qntsty = &s->qntsty;
976
977 s->avctx = avctx;
978 av_log(s->avctx, AV_LOG_DEBUG, "init\n");
979
980 // defaults:
981 // TODO: implement setting non-standard precinct size
982 memset(codsty->log2_prec_widths , 15, sizeof(codsty->log2_prec_widths ));
983 memset(codsty->log2_prec_heights, 15, sizeof(codsty->log2_prec_heights));
984 codsty->nreslevels2decode=
985 codsty->nreslevels = 7;
986 codsty->log2_cblk_width = 4;
987 codsty->log2_cblk_height = 4;
988 codsty->transform = avctx->prediction_method ? FF_DWT53 : FF_DWT97_INT;
989
990 qntsty->nguardbits = 1;
991
992 s->tile_width = 256;
993 s->tile_height = 256;
994
995 if (codsty->transform == FF_DWT53)
996 qntsty->quantsty = JPEG2000_QSTY_NONE;
997 else
998 qntsty->quantsty = JPEG2000_QSTY_SE;
999
1000 s->width = avctx->width;
1001 s->height = avctx->height;
1002
1003 for (i = 0; i < 3; i++)
1004 s->cbps[i] = 8;
1005
1006 if (avctx->pix_fmt == AV_PIX_FMT_RGB24){
1007 s->ncomponents = 3;
1008 } else if (avctx->pix_fmt == AV_PIX_FMT_GRAY8){
1009 s->ncomponents = 1;
1010 } else{ // planar YUV
1011 s->planar = 1;
1012 s->ncomponents = 3;
1013 avcodec_get_chroma_sub_sample(avctx->pix_fmt,
1014 s->chroma_shift, s->chroma_shift + 1);
1015 }
1016
1017 ff_jpeg2000_init_tier1_luts();
1018 ff_mqc_init_context_tables();
1019 init_luts();
1020
1021 init_quantization(s);
1022 if (ret=init_tiles(s))
1023 return ret;
1024
1025 av_log(s->avctx, AV_LOG_DEBUG, "after init\n");
1026
1027 return 0;
1028}
1029
1030static int j2kenc_destroy(AVCodecContext *avctx)
1031{
1032 Jpeg2000EncoderContext *s = avctx->priv_data;
1033
1034 cleanup(s);
1035 return 0;
1036}
1037
1038AVCodec ff_jpeg2000_encoder = {
1039 .name = "jpeg2000",
1040 .long_name = NULL_IF_CONFIG_SMALL("JPEG 2000"),
1041 .type = AVMEDIA_TYPE_VIDEO,
1042 .id = AV_CODEC_ID_JPEG2000,
1043 .priv_data_size = sizeof(Jpeg2000EncoderContext),
1044 .init = j2kenc_init,
1045 .encode2 = encode_frame,
1046 .close = j2kenc_destroy,
1047 .capabilities = CODEC_CAP_EXPERIMENTAL,
1048 .pix_fmts = (const enum AVPixelFormat[]) {
1049 AV_PIX_FMT_RGB24, AV_PIX_FMT_YUV444P, AV_PIX_FMT_GRAY8,
1050/* AV_PIX_FMT_YUV420P,
1051 AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
1052 AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,*/
1053 AV_PIX_FMT_NONE
1054 }
1055};
ffmpeg Piment Noir Debian package repository