path: root/libavcodec/j2kenc.c (plain)
blob: c8d38617327d28f277db9ca116a7ed5bd9242758

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	*
24	*
25	* This source code incorporates work covered by the following copyright and
26	* permission notice:
27	*
28	* Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
29	* Copyright (c) 2002-2007, Professor Benoit Macq
30	* Copyright (c) 2001-2003, David Janssens
31	* Copyright (c) 2002-2003, Yannick Verschueren
32	* Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
33	* Copyright (c) 2005, Herve Drolon, FreeImage Team
34	* Copyright (c) 2007, Callum Lerwick <seg@haxxed.com>
35	* All rights reserved.
36	*
37	* Redistribution and use in source and binary forms, with or without
38	* modification, are permitted provided that the following conditions
39	* are met:
40	* 1. Redistributions of source code must retain the above copyright
41	* notice, this list of conditions and the following disclaimer.
42	* 2. Redistributions in binary form must reproduce the above copyright
43	* notice, this list of conditions and the following disclaimer in the
44	* documentation and/or other materials provided with the distribution.
45	*
46	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
47	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
48	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
49	* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
50	* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
51	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
52	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
53	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
54	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
55	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
56	* POSSIBILITY OF SUCH DAMAGE.
57	*/
58
59
60	/**
61	* JPEG2000 image encoder
62	* @file
63	* @author Kamil Nowosad
64	*/
65
66	#include <float.h>
67	#include "avcodec.h"
68	#include "internal.h"
69	#include "bytestream.h"
70	#include "jpeg2000.h"
71	#include "libavutil/common.h"
72	#include "libavutil/opt.h"
73
74	#define NMSEDEC_BITS 7
75	#define NMSEDEC_FRACBITS (NMSEDEC_BITS-1)
76	#define WMSEDEC_SHIFT 13 ///< must be >= 13
77	#define LAMBDA_SCALE (100000000LL << (WMSEDEC_SHIFT - 13))
78
79	#define CODEC_JP2 1
80	#define CODEC_J2K 0
81
82	static int lut_nmsedec_ref [1<<NMSEDEC_BITS],
83	lut_nmsedec_ref0[1<<NMSEDEC_BITS],
84	lut_nmsedec_sig [1<<NMSEDEC_BITS],
85	lut_nmsedec_sig0[1<<NMSEDEC_BITS];
86
87	static const int dwt_norms[2][4][10] = { // [dwt_type][band][rlevel] (multiplied by 10000)
88	{{10000, 19650, 41770, 84030, 169000, 338400, 676900, 1353000, 2706000, 5409000},
89	{20220, 39890, 83550, 170400, 342700, 686300, 1373000, 2746000, 5490000},
90	{20220, 39890, 83550, 170400, 342700, 686300, 1373000, 2746000, 5490000},
91	{20800, 38650, 83070, 171800, 347100, 695900, 1393000, 2786000, 5572000}},
92
93	{{10000, 15000, 27500, 53750, 106800, 213400, 426700, 853300, 1707000, 3413000},
94	{10380, 15920, 29190, 57030, 113300, 226400, 452500, 904800, 1809000},
95	{10380, 15920, 29190, 57030, 113300, 226400, 452500, 904800, 1809000},
96	{ 7186, 9218, 15860, 30430, 60190, 120100, 240000, 479700, 959300}}
97	};
98
99	typedef struct {
100	Jpeg2000Component *comp;
101	} Jpeg2000Tile;
102
103	typedef struct {
104	AVClass *class;
105	AVCodecContext *avctx;
106	const AVFrame *picture;
107
108	int width, height; ///< image width and height
109	uint8_t cbps[4]; ///< bits per sample in particular components
110	int chroma_shift[2];
111	uint8_t planar;
112	int ncomponents;
113	int tile_width, tile_height; ///< tile size
114	int numXtiles, numYtiles;
115
116	uint8_t *buf_start;
117	uint8_t *buf;
118	uint8_t *buf_end;
119	int bit_index;
120
121	int64_t lambda;
122
123	Jpeg2000CodingStyle codsty;
124	Jpeg2000QuantStyle qntsty;
125
126	Jpeg2000Tile *tile;
127
128	int format;
129	int pred;
130	} Jpeg2000EncoderContext;
131
132
133	/* debug */
134	#if 0
135	#undef ifprintf
136	#undef printf
137
138	static void nspaces(FILE *fd, int n)
139	{
140	while(n--) putc(' ', fd);
141	}
142
143	static void printcomp(Jpeg2000Component *comp)
144	{
145	int i;
146	for (i = 0; i < comp->y1 - comp->y0; i++)
147	ff_jpeg2000_printv(comp->i_data + i * (comp->x1 - comp->x0), comp->x1 - comp->x0);
148	}
149
150	static void dump(Jpeg2000EncoderContext *s, FILE *fd)
151	{
152	int tileno, compno, reslevelno, bandno, precno;
153	fprintf(fd, "XSiz = %d, YSiz = %d, tile_width = %d, tile_height = %d\n"
154	"numXtiles = %d, numYtiles = %d, ncomponents = %d\n"
155	"tiles:\n",
156	s->width, s->height, s->tile_width, s->tile_height,
157	s->numXtiles, s->numYtiles, s->ncomponents);
158	for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){
159	Jpeg2000Tile *tile = s->tile + tileno;
160	nspaces(fd, 2);
161	fprintf(fd, "tile %d:\n", tileno);
162	for(compno = 0; compno < s->ncomponents; compno++){
163	Jpeg2000Component *comp = tile->comp + compno;
164	nspaces(fd, 4);
165	fprintf(fd, "component %d:\n", compno);
166	nspaces(fd, 4);
167	fprintf(fd, "x0 = %d, x1 = %d, y0 = %d, y1 = %d\n",
168	comp->x0, comp->x1, comp->y0, comp->y1);
169	for(reslevelno = 0; reslevelno < s->nreslevels; reslevelno++){
170	Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno;
171	nspaces(fd, 6);
172	fprintf(fd, "reslevel %d:\n", reslevelno);
173	nspaces(fd, 6);
174	fprintf(fd, "x0 = %d, x1 = %d, y0 = %d, y1 = %d, nbands = %d\n",
175	reslevel->x0, reslevel->x1, reslevel->y0,
176	reslevel->y1, reslevel->nbands);
177	for(bandno = 0; bandno < reslevel->nbands; bandno++){
178	Jpeg2000Band *band = reslevel->band + bandno;
179	nspaces(fd, 8);
180	fprintf(fd, "band %d:\n", bandno);
181	nspaces(fd, 8);
182	fprintf(fd, "x0 = %d, x1 = %d, y0 = %d, y1 = %d,"
183	"codeblock_width = %d, codeblock_height = %d cblknx = %d cblkny = %d\n",
184	band->x0, band->x1,
185	band->y0, band->y1,
186	band->codeblock_width, band->codeblock_height,
187	band->cblknx, band->cblkny);
188	for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++){
189	Jpeg2000Prec *prec = band->prec + precno;
190	nspaces(fd, 10);
191	fprintf(fd, "prec %d:\n", precno);
192	nspaces(fd, 10);
193	fprintf(fd, "xi0 = %d, xi1 = %d, yi0 = %d, yi1 = %d\n",
194	prec->xi0, prec->xi1, prec->yi0, prec->yi1);
195	}
196	}
197	}
198	}
199	}
200	}
201	#endif
202
203	/* bitstream routines */
204
205	/** put n times val bit */
206	static void put_bits(Jpeg2000EncoderContext *s, int val, int n) // TODO: optimize
207	{
208	while (n-- > 0){
209	if (s->bit_index == 8)
210	{
211	s->bit_index = *s->buf == 0xff;
212	*(++s->buf) = 0;
213	}
214	*s->buf |= val << (7 - s->bit_index++);
215	}
216	}
217
218	/** put n least significant bits of a number num */
219	static void put_num(Jpeg2000EncoderContext *s, int num, int n)
220	{
221	while(--n >= 0)
222	put_bits(s, (num >> n) & 1, 1);
223	}
224
225	/** flush the bitstream */
226	static void j2k_flush(Jpeg2000EncoderContext *s)
227	{
228	if (s->bit_index){
229	s->bit_index = 0;
230	s->buf++;
231	}
232	}
233
234	/* tag tree routines */
235
236	/** code the value stored in node */
237	static void tag_tree_code(Jpeg2000EncoderContext *s, Jpeg2000TgtNode *node, int threshold)
238	{
239	Jpeg2000TgtNode *stack[30];
240	int sp = 1, curval = 0;
241	stack[0] = node;
242
243	node = node->parent;
244	while(node){
245	if (node->vis){
246	curval = node->val;
247	break;
248	}
249	node->vis++;
250	stack[sp++] = node;
251	node = node->parent;
252	}
253	while(--sp >= 0){
254	if (stack[sp]->val >= threshold){
255	put_bits(s, 0, threshold - curval);
256	break;
257	}
258	put_bits(s, 0, stack[sp]->val - curval);
259	put_bits(s, 1, 1);
260	curval = stack[sp]->val;
261	}
262	}
263
264	/** update the value in node */
265	static void tag_tree_update(Jpeg2000TgtNode *node)
266	{
267	int lev = 0;
268	while (node->parent){
269	if (node->parent->val <= node->val)
270	break;
271	node->parent->val = node->val;
272	node = node->parent;
273	lev++;
274	}
275	}
276
277	static int put_siz(Jpeg2000EncoderContext *s)
278	{
279	int i;
280
281	if (s->buf_end - s->buf < 40 + 3 * s->ncomponents)
282	return -1;
283
284	bytestream_put_be16(&s->buf, JPEG2000_SIZ);
285	bytestream_put_be16(&s->buf, 38 + 3 * s->ncomponents); // Lsiz
286	bytestream_put_be16(&s->buf, 0); // Rsiz
287	bytestream_put_be32(&s->buf, s->width); // width
288	bytestream_put_be32(&s->buf, s->height); // height
289	bytestream_put_be32(&s->buf, 0); // X0Siz
290	bytestream_put_be32(&s->buf, 0); // Y0Siz
291
292	bytestream_put_be32(&s->buf, s->tile_width); // XTSiz
293	bytestream_put_be32(&s->buf, s->tile_height); // YTSiz
294	bytestream_put_be32(&s->buf, 0); // XT0Siz
295	bytestream_put_be32(&s->buf, 0); // YT0Siz
296	bytestream_put_be16(&s->buf, s->ncomponents); // CSiz
297
298	for (i = 0; i < s->ncomponents; i++){ // Ssiz_i XRsiz_i, YRsiz_i
299	bytestream_put_byte(&s->buf, 7);
300	bytestream_put_byte(&s->buf, i?1<<s->chroma_shift[0]:1);
301	bytestream_put_byte(&s->buf, i?1<<s->chroma_shift[1]:1);
302	}
303	return 0;
304	}
305
306	static int put_cod(Jpeg2000EncoderContext *s)
307	{
308	Jpeg2000CodingStyle *codsty = &s->codsty;
309
310	if (s->buf_end - s->buf < 14)
311	return -1;
312
313	bytestream_put_be16(&s->buf, JPEG2000_COD);
314	bytestream_put_be16(&s->buf, 12); // Lcod
315	bytestream_put_byte(&s->buf, 0); // Scod
316	// SGcod
317	bytestream_put_byte(&s->buf, 0); // progression level
318	bytestream_put_be16(&s->buf, 1); // num of layers
319	if(s->avctx->pix_fmt == AV_PIX_FMT_YUV444P){
320	bytestream_put_byte(&s->buf, 0); // unspecified
321	}else{
322	bytestream_put_byte(&s->buf, 0); // unspecified
323	}
324	// SPcod
325	bytestream_put_byte(&s->buf, codsty->nreslevels - 1); // num of decomp. levels
326	bytestream_put_byte(&s->buf, codsty->log2_cblk_width-2); // cblk width
327	bytestream_put_byte(&s->buf, codsty->log2_cblk_height-2); // cblk height
328	bytestream_put_byte(&s->buf, 0); // cblk style
329	bytestream_put_byte(&s->buf, codsty->transform == FF_DWT53); // transformation
330	return 0;
331	}
332
333	static int put_qcd(Jpeg2000EncoderContext *s, int compno)
334	{
335	int i, size;
336	Jpeg2000CodingStyle *codsty = &s->codsty;
337	Jpeg2000QuantStyle *qntsty = &s->qntsty;
338
339	if (qntsty->quantsty == JPEG2000_QSTY_NONE)
340	size = 4 + 3 * (codsty->nreslevels-1);
341	else // QSTY_SE
342	size = 5 + 6 * (codsty->nreslevels-1);
343
344	if (s->buf_end - s->buf < size + 2)
345	return -1;
346
347	bytestream_put_be16(&s->buf, JPEG2000_QCD);
348	bytestream_put_be16(&s->buf, size); // LQcd
349	bytestream_put_byte(&s->buf, (qntsty->nguardbits << 5) | qntsty->quantsty); // Sqcd
350	if (qntsty->quantsty == JPEG2000_QSTY_NONE)
351	for (i = 0; i < codsty->nreslevels * 3 - 2; i++)
352	bytestream_put_byte(&s->buf, qntsty->expn[i] << 3);
353	else // QSTY_SE
354	for (i = 0; i < codsty->nreslevels * 3 - 2; i++)
355	bytestream_put_be16(&s->buf, (qntsty->expn[i] << 11) | qntsty->mant[i]);
356	return 0;
357	}
358
359	static int put_com(Jpeg2000EncoderContext *s, int compno)
360	{
361	int size = 4 + strlen(LIBAVCODEC_IDENT);
362
363	if (s->avctx->flags & AV_CODEC_FLAG_BITEXACT)
364	return 0;
365
366	if (s->buf_end - s->buf < size + 2)
367	return -1;
368
369	bytestream_put_be16(&s->buf, JPEG2000_COM);
370	bytestream_put_be16(&s->buf, size);
371	bytestream_put_be16(&s->buf, 1); // General use (ISO/IEC 8859-15 (Latin) values)
372
373	bytestream_put_buffer(&s->buf, LIBAVCODEC_IDENT, strlen(LIBAVCODEC_IDENT));
374
375	return 0;
376	}
377
378	static uint8_t *put_sot(Jpeg2000EncoderContext *s, int tileno)
379	{
380	uint8_t *psotptr;
381
382	if (s->buf_end - s->buf < 12)
383	return NULL;
384
385	bytestream_put_be16(&s->buf, JPEG2000_SOT);
386	bytestream_put_be16(&s->buf, 10); // Lsot
387	bytestream_put_be16(&s->buf, tileno); // Isot
388
389	psotptr = s->buf;
390	bytestream_put_be32(&s->buf, 0); // Psot (filled in later)
391
392	bytestream_put_byte(&s->buf, 0); // TPsot
393	bytestream_put_byte(&s->buf, 1); // TNsot
394	return psotptr;
395	}
396
397	/**
398	* compute the sizes of tiles, resolution levels, bands, etc.
399	* allocate memory for them
400	* divide the input image into tile-components
401	*/
402	static int init_tiles(Jpeg2000EncoderContext *s)
403	{
404	int tileno, tilex, tiley, compno;
405	Jpeg2000CodingStyle *codsty = &s->codsty;
406	Jpeg2000QuantStyle *qntsty = &s->qntsty;
407
408	s->numXtiles = ff_jpeg2000_ceildiv(s->width, s->tile_width);
409	s->numYtiles = ff_jpeg2000_ceildiv(s->height, s->tile_height);
410
411	s->tile = av_malloc_array(s->numXtiles, s->numYtiles * sizeof(Jpeg2000Tile));
412	if (!s->tile)
413	return AVERROR(ENOMEM);
414	for (tileno = 0, tiley = 0; tiley < s->numYtiles; tiley++)
415	for (tilex = 0; tilex < s->numXtiles; tilex++, tileno++){
416	Jpeg2000Tile *tile = s->tile + tileno;
417
418	tile->comp = av_mallocz_array(s->ncomponents, sizeof(Jpeg2000Component));
419	if (!tile->comp)
420	return AVERROR(ENOMEM);
421	for (compno = 0; compno < s->ncomponents; compno++){
422	Jpeg2000Component *comp = tile->comp + compno;
423	int ret, i, j;
424
425	comp->coord[0][0] = comp->coord_o[0][0] = tilex * s->tile_width;
426	comp->coord[0][1] = comp->coord_o[0][1] = FFMIN((tilex+1)*s->tile_width, s->width);
427	comp->coord[1][0] = comp->coord_o[1][0] = tiley * s->tile_height;
428	comp->coord[1][1] = comp->coord_o[1][1] = FFMIN((tiley+1)*s->tile_height, s->height);
429	if (compno > 0)
430	for (i = 0; i < 2; i++)
431	for (j = 0; j < 2; j++)
432	comp->coord[i][j] = comp->coord_o[i][j] = ff_jpeg2000_ceildivpow2(comp->coord[i][j], s->chroma_shift[i]);
433
434	if ((ret = ff_jpeg2000_init_component(comp,
435	codsty,
436	qntsty,
437	s->cbps[compno],
438	compno?1<<s->chroma_shift[0]:1,
439	compno?1<<s->chroma_shift[1]:1,
440	s->avctx
441	)) < 0)
442	return ret;
443	}
444	}
445	return 0;
446	}
447
448	static void copy_frame(Jpeg2000EncoderContext *s)
449	{
450	int tileno, compno, i, y, x;
451	uint8_t *line;
452	for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){
453	Jpeg2000Tile *tile = s->tile + tileno;
454	if (s->planar){
455	for (compno = 0; compno < s->ncomponents; compno++){
456	Jpeg2000Component *comp = tile->comp + compno;
457	int *dst = comp->i_data;
458	line = s->picture->data[compno]
459	+ comp->coord[1][0] * s->picture->linesize[compno]
460	+ comp->coord[0][0];
461	for (y = comp->coord[1][0]; y < comp->coord[1][1]; y++){
462	uint8_t *ptr = line;
463	for (x = comp->coord[0][0]; x < comp->coord[0][1]; x++)
464	*dst++ = *ptr++ - (1 << 7);
465	line += s->picture->linesize[compno];
466	}
467	}
468	} else{
469	line = s->picture->data[0] + tile->comp[0].coord[1][0] * s->picture->linesize[0]
470	+ tile->comp[0].coord[0][0] * s->ncomponents;
471
472	i = 0;
473	for (y = tile->comp[0].coord[1][0]; y < tile->comp[0].coord[1][1]; y++){
474	uint8_t *ptr = line;
475	for (x = tile->comp[0].coord[0][0]; x < tile->comp[0].coord[0][1]; x++, i++){
476	for (compno = 0; compno < s->ncomponents; compno++){
477	tile->comp[compno].i_data[i] = *ptr++ - (1 << 7);
478	}
479	}
480	line += s->picture->linesize[0];
481	}
482	}
483	}
484	}
485
486	static void init_quantization(Jpeg2000EncoderContext *s)
487	{
488	int compno, reslevelno, bandno;
489	Jpeg2000QuantStyle *qntsty = &s->qntsty;
490	Jpeg2000CodingStyle *codsty = &s->codsty;
491
492	for (compno = 0; compno < s->ncomponents; compno++){
493	int gbandno = 0;
494	for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++){
495	int nbands, lev = codsty->nreslevels - reslevelno - 1;
496	nbands = reslevelno ? 3 : 1;
497	for (bandno = 0; bandno < nbands; bandno++, gbandno++){
498	int expn, mant = 0;
499
500	if (codsty->transform == FF_DWT97_INT){
501	int bandpos = bandno + (reslevelno>0),
502	ss = 81920000 / dwt_norms[0][bandpos][lev],
503	log = av_log2(ss);
504	mant = (11 - log < 0 ? ss >> log - 11 : ss << 11 - log) & 0x7ff;
505	expn = s->cbps[compno] - log + 13;
506	} else
507	expn = ((bandno&2)>>1) + (reslevelno>0) + s->cbps[compno];
508
509	qntsty->expn[gbandno] = expn;
510	qntsty->mant[gbandno] = mant;
511	}
512	}
513	}
514	}
515
516	static void init_luts(void)
517	{
518	int i, a,
519	mask = ~((1<<NMSEDEC_FRACBITS)-1);
520
521	for (i = 0; i < (1 << NMSEDEC_BITS); i++){
522	lut_nmsedec_sig[i] = FFMAX(6*i - (9<<NMSEDEC_FRACBITS-1) << 12-NMSEDEC_FRACBITS, 0);
523	lut_nmsedec_sig0[i] = FFMAX((i*i + (1<<NMSEDEC_FRACBITS-1) & mask) << 1, 0);
524
525	a = (i >> (NMSEDEC_BITS-2)&2) + 1;
526	lut_nmsedec_ref[i] = FFMAX((-2*i + (1<<NMSEDEC_FRACBITS) + a*i - (a*a<<NMSEDEC_FRACBITS-2))
527	<< 13-NMSEDEC_FRACBITS, 0);
528	lut_nmsedec_ref0[i] = FFMAX(((i*i + (1-4*i << NMSEDEC_FRACBITS-1) + (1<<2*NMSEDEC_FRACBITS)) & mask)
529	<< 1, 0);
530	}
531	}
532
533	/* tier-1 routines */
534	static int getnmsedec_sig(int x, int bpno)
535	{
536	if (bpno > NMSEDEC_FRACBITS)
537	return lut_nmsedec_sig[(x >> (bpno - NMSEDEC_FRACBITS)) & ((1 << NMSEDEC_BITS) - 1)];
538	return lut_nmsedec_sig0[x & ((1 << NMSEDEC_BITS) - 1)];
539	}
540
541	static int getnmsedec_ref(int x, int bpno)
542	{
543	if (bpno > NMSEDEC_FRACBITS)
544	return lut_nmsedec_ref[(x >> (bpno - NMSEDEC_FRACBITS)) & ((1 << NMSEDEC_BITS) - 1)];
545	return lut_nmsedec_ref0[x & ((1 << NMSEDEC_BITS) - 1)];
546	}
547
548	static void encode_sigpass(Jpeg2000T1Context *t1, int width, int height, int bandno, int *nmsedec, int bpno)
549	{
550	int y0, x, y, mask = 1 << (bpno + NMSEDEC_FRACBITS);
551	for (y0 = 0; y0 < height; y0 += 4)
552	for (x = 0; x < width; x++)
553	for (y = y0; y < height && y < y0+4; y++){
554	if (!(t1->flags[(y+1) * t1->stride + x+1] & JPEG2000_T1_SIG) && (t1->flags[(y+1) * t1->stride + x+1] & JPEG2000_T1_SIG_NB)){
555	int ctxno = ff_jpeg2000_getsigctxno(t1->flags[(y+1) * t1->stride + x+1], bandno),
556	bit = t1->data[(y) * t1->stride + x] & mask ? 1 : 0;
557	ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + ctxno, bit);
558	if (bit){
559	int xorbit;
560	int ctxno = ff_jpeg2000_getsgnctxno(t1->flags[(y+1) * t1->stride + x+1], &xorbit);
561	ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + ctxno, (t1->flags[(y+1) * t1->stride + x+1] >> 15) ^ xorbit);
562	*nmsedec += getnmsedec_sig(t1->data[(y) * t1->stride + x], bpno + NMSEDEC_FRACBITS);
563	ff_jpeg2000_set_significance(t1, x, y, t1->flags[(y+1) * t1->stride + x+1] >> 15);
564	}
565	t1->flags[(y+1) * t1->stride + x+1] |= JPEG2000_T1_VIS;
566	}
567	}
568	}
569
570	static void encode_refpass(Jpeg2000T1Context *t1, int width, int height, int *nmsedec, int bpno)
571	{
572	int y0, x, y, mask = 1 << (bpno + NMSEDEC_FRACBITS);
573	for (y0 = 0; y0 < height; y0 += 4)
574	for (x = 0; x < width; x++)
575	for (y = y0; y < height && y < y0+4; y++)
576	if ((t1->flags[(y+1) * t1->stride + x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS)) == JPEG2000_T1_SIG){
577	int ctxno = ff_jpeg2000_getrefctxno(t1->flags[(y+1) * t1->stride + x+1]);
578	*nmsedec += getnmsedec_ref(t1->data[(y) * t1->stride + x], bpno + NMSEDEC_FRACBITS);
579	ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + ctxno, t1->data[(y) * t1->stride + x] & mask ? 1:0);
580	t1->flags[(y+1) * t1->stride + x+1] |= JPEG2000_T1_REF;
581	}
582	}
583
584	static void encode_clnpass(Jpeg2000T1Context *t1, int width, int height, int bandno, int *nmsedec, int bpno)
585	{
586	int y0, x, y, mask = 1 << (bpno + NMSEDEC_FRACBITS);
587	for (y0 = 0; y0 < height; y0 += 4)
588	for (x = 0; x < width; x++){
589	if (y0 + 3 < height && !(
590	(t1->flags[(y0+1) * t1->stride + x+1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
591	(t1->flags[(y0+2) * t1->stride + x+1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
592	(t1->flags[(y0+3) * t1->stride + x+1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
593	(t1->flags[(y0+4) * t1->stride + x+1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG))))
594	{
595	// aggregation mode
596	int rlen;
597	for (rlen = 0; rlen < 4; rlen++)
598	if (t1->data[(y0+rlen) * t1->stride + x] & mask)
599	break;
600	ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + MQC_CX_RL, rlen != 4);
601	if (rlen == 4)
602	continue;
603	ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI, rlen >> 1);
604	ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI, rlen & 1);
605	for (y = y0 + rlen; y < y0 + 4; y++){
606	if (!(t1->flags[(y+1) * t1->stride + x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))){
607	int ctxno = ff_jpeg2000_getsigctxno(t1->flags[(y+1) * t1->stride + x+1], bandno);
608	if (y > y0 + rlen)
609	ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + ctxno, t1->data[(y) * t1->stride + x] & mask ? 1:0);
610	if (t1->data[(y) * t1->stride + x] & mask){ // newly significant
611	int xorbit;
612	int ctxno = ff_jpeg2000_getsgnctxno(t1->flags[(y+1) * t1->stride + x+1], &xorbit);
613	*nmsedec += getnmsedec_sig(t1->data[(y) * t1->stride + x], bpno + NMSEDEC_FRACBITS);
614	ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + ctxno, (t1->flags[(y+1) * t1->stride + x+1] >> 15) ^ xorbit);
615	ff_jpeg2000_set_significance(t1, x, y, t1->flags[(y+1) * t1->stride + x+1] >> 15);
616	}
617	}
618	t1->flags[(y+1) * t1->stride + x+1] &= ~JPEG2000_T1_VIS;
619	}
620	} else{
621	for (y = y0; y < y0 + 4 && y < height; y++){
622	if (!(t1->flags[(y+1) * t1->stride + x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))){
623	int ctxno = ff_jpeg2000_getsigctxno(t1->flags[(y+1) * t1->stride + x+1], bandno);
624	ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + ctxno, t1->data[(y) * t1->stride + x] & mask ? 1:0);
625	if (t1->data[(y) * t1->stride + x] & mask){ // newly significant
626	int xorbit;
627	int ctxno = ff_jpeg2000_getsgnctxno(t1->flags[(y+1) * t1->stride + x+1], &xorbit);
628	*nmsedec += getnmsedec_sig(t1->data[(y) * t1->stride + x], bpno + NMSEDEC_FRACBITS);
629	ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + ctxno, (t1->flags[(y+1) * t1->stride + x+1] >> 15) ^ xorbit);
630	ff_jpeg2000_set_significance(t1, x, y, t1->flags[(y+1) * t1->stride + x+1] >> 15);
631	}
632	}
633	t1->flags[(y+1) * t1->stride + x+1] &= ~JPEG2000_T1_VIS;
634	}
635	}
636	}
637	}
638
639	static void encode_cblk(Jpeg2000EncoderContext *s, Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk, Jpeg2000Tile *tile,
640	int width, int height, int bandpos, int lev)
641	{
642	int pass_t = 2, passno, x, y, max=0, nmsedec, bpno;
643	int64_t wmsedec = 0;
644
645	memset(t1->flags, 0, t1->stride * (height + 2) * sizeof(*t1->flags));
646
647	for (y = 0; y < height; y++){
648	for (x = 0; x < width; x++){
649	if (t1->data[(y) * t1->stride + x] < 0){
650	t1->flags[(y+1) * t1->stride + x+1] |= JPEG2000_T1_SGN;
651	t1->data[(y) * t1->stride + x] = -t1->data[(y) * t1->stride + x];
652	}
653	max = FFMAX(max, t1->data[(y) * t1->stride + x]);
654	}
655	}
656
657	if (max == 0){
658	cblk->nonzerobits = 0;
659	bpno = 0;
660	} else{
661	cblk->nonzerobits = av_log2(max) + 1 - NMSEDEC_FRACBITS;
662	bpno = cblk->nonzerobits - 1;
663	}
664
665	ff_mqc_initenc(&t1->mqc, cblk->data);
666
667	for (passno = 0; bpno >= 0; passno++){
668	nmsedec=0;
669
670	switch(pass_t){
671	case 0: encode_sigpass(t1, width, height, bandpos, &nmsedec, bpno);
672	break;
673	case 1: encode_refpass(t1, width, height, &nmsedec, bpno);
674	break;
675	case 2: encode_clnpass(t1, width, height, bandpos, &nmsedec, bpno);
676	break;
677	}
678
679	cblk->passes[passno].rate = ff_mqc_flush_to(&t1->mqc, cblk->passes[passno].flushed, &cblk->passes[passno].flushed_len);
680	wmsedec += (int64_t)nmsedec << (2*bpno);
681	cblk->passes[passno].disto = wmsedec;
682
683	if (++pass_t == 3){
684	pass_t = 0;
685	bpno--;
686	}
687	}
688	cblk->npasses = passno;
689	cblk->ninclpasses = passno;
690
691	cblk->passes[passno-1].rate = ff_mqc_flush_to(&t1->mqc, cblk->passes[passno-1].flushed, &cblk->passes[passno-1].flushed_len);
692	}
693
694	/* tier-2 routines: */
695
696	static void putnumpasses(Jpeg2000EncoderContext *s, int n)
697	{
698	if (n == 1)
699	put_num(s, 0, 1);
700	else if (n == 2)
701	put_num(s, 2, 2);
702	else if (n <= 5)
703	put_num(s, 0xc | (n-3), 4);
704	else if (n <= 36)
705	put_num(s, 0x1e0 | (n-6), 9);
706	else
707	put_num(s, 0xff80 | (n-37), 16);
708	}
709
710
711	static int encode_packet(Jpeg2000EncoderContext *s, Jpeg2000ResLevel *rlevel, int precno,
712	uint8_t *expn, int numgbits)
713	{
714	int bandno, empty = 1;
715
716	// init bitstream
717	*s->buf = 0;
718	s->bit_index = 0;
719
720	// header
721
722	// is the packet empty?
723	for (bandno = 0; bandno < rlevel->nbands; bandno++){
724	if (rlevel->band[bandno].coord[0][0] < rlevel->band[bandno].coord[0][1]
725	&& rlevel->band[bandno].coord[1][0] < rlevel->band[bandno].coord[1][1]){
726	empty = 0;
727	break;
728	}
729	}
730
731	put_bits(s, !empty, 1);
732	if (empty){
733	j2k_flush(s);
734	return 0;
735	}
736
737	for (bandno = 0; bandno < rlevel->nbands; bandno++){
738	Jpeg2000Band *band = rlevel->band + bandno;
739	Jpeg2000Prec *prec = band->prec + precno;
740	int yi, xi, pos;
741	int cblknw = prec->nb_codeblocks_width;
742
743	if (band->coord[0][0] == band->coord[0][1]
744	|| band->coord[1][0] == band->coord[1][1])
745	continue;
746
747	for (pos=0, yi = 0; yi < prec->nb_codeblocks_height; yi++){
748	for (xi = 0; xi < cblknw; xi++, pos++){
749	prec->cblkincl[pos].val = prec->cblk[yi * cblknw + xi].ninclpasses == 0;
750	tag_tree_update(prec->cblkincl + pos);
751	prec->zerobits[pos].val = expn[bandno] + numgbits - 1 - prec->cblk[yi * cblknw + xi].nonzerobits;
752	tag_tree_update(prec->zerobits + pos);
753	}
754	}
755
756	for (pos=0, yi = 0; yi < prec->nb_codeblocks_height; yi++){
757	for (xi = 0; xi < cblknw; xi++, pos++){
758	int pad = 0, llen, length;
759	Jpeg2000Cblk *cblk = prec->cblk + yi * cblknw + xi;
760
761	if (s->buf_end - s->buf < 20) // approximately
762	return -1;
763
764	// inclusion information
765	tag_tree_code(s, prec->cblkincl + pos, 1);
766	if (!cblk->ninclpasses)
767	continue;
768	// zerobits information
769	tag_tree_code(s, prec->zerobits + pos, 100);
770	// number of passes
771	putnumpasses(s, cblk->ninclpasses);
772
773	length = cblk->passes[cblk->ninclpasses-1].rate;
774	llen = av_log2(length) - av_log2(cblk->ninclpasses) - 2;
775	if (llen < 0){
776	pad = -llen;
777	llen = 0;
778	}
779	// length of code block
780	put_bits(s, 1, llen);
781	put_bits(s, 0, 1);
782	put_num(s, length, av_log2(length)+1+pad);
783	}
784	}
785	}
786	j2k_flush(s);
787	for (bandno = 0; bandno < rlevel->nbands; bandno++){
788	Jpeg2000Band *band = rlevel->band + bandno;
789	Jpeg2000Prec *prec = band->prec + precno;
790	int yi, cblknw = prec->nb_codeblocks_width;
791	for (yi =0; yi < prec->nb_codeblocks_height; yi++){
792	int xi;
793	for (xi = 0; xi < cblknw; xi++){
794	Jpeg2000Cblk *cblk = prec->cblk + yi * cblknw + xi;
795	if (cblk->ninclpasses){
796	if (s->buf_end - s->buf < cblk->passes[cblk->ninclpasses-1].rate)
797	return -1;
798	bytestream_put_buffer(&s->buf, cblk->data, cblk->passes[cblk->ninclpasses-1].rate
799	- cblk->passes[cblk->ninclpasses-1].flushed_len);
800	bytestream_put_buffer(&s->buf, cblk->passes[cblk->ninclpasses-1].flushed,
801	cblk->passes[cblk->ninclpasses-1].flushed_len);
802	}
803	}
804	}
805	}
806	return 0;
807	}
808
809	static int encode_packets(Jpeg2000EncoderContext *s, Jpeg2000Tile *tile, int tileno)
810	{
811	int compno, reslevelno, ret;
812	Jpeg2000CodingStyle *codsty = &s->codsty;
813	Jpeg2000QuantStyle *qntsty = &s->qntsty;
814
815	av_log(s->avctx, AV_LOG_DEBUG, "tier2\n");
816	// lay-rlevel-comp-pos progression
817	for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++){
818	for (compno = 0; compno < s->ncomponents; compno++){
819	int precno;
820	Jpeg2000ResLevel *reslevel = s->tile[tileno].comp[compno].reslevel + reslevelno;
821	for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++){
822	if ((ret = encode_packet(s, reslevel, precno, qntsty->expn + (reslevelno ? 3*reslevelno-2 : 0),
823	qntsty->nguardbits)) < 0)
824	return ret;
825	}
826	}
827	}
828	av_log(s->avctx, AV_LOG_DEBUG, "after tier2\n");
829	return 0;
830	}
831
832	static int getcut(Jpeg2000Cblk *cblk, int64_t lambda, int dwt_norm)
833	{
834	int passno, res = 0;
835	for (passno = 0; passno < cblk->npasses; passno++){
836	int dr;
837	int64_t dd;
838
839	dr = cblk->passes[passno].rate
840	- (res ? cblk->passes[res-1].rate:0);
841	dd = cblk->passes[passno].disto
842	- (res ? cblk->passes[res-1].disto:0);
843
844	if (((dd * dwt_norm) >> WMSEDEC_SHIFT) * dwt_norm >= dr * lambda)
845	res = passno+1;
846	}
847	return res;
848	}
849
850	static void truncpasses(Jpeg2000EncoderContext *s, Jpeg2000Tile *tile)
851	{
852	int precno, compno, reslevelno, bandno, cblkno, lev;
853	Jpeg2000CodingStyle *codsty = &s->codsty;
854
855	for (compno = 0; compno < s->ncomponents; compno++){
856	Jpeg2000Component *comp = tile->comp + compno;
857
858	for (reslevelno = 0, lev = codsty->nreslevels-1; reslevelno < codsty->nreslevels; reslevelno++, lev--){
859	Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno;
860
861	for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++){
862	for (bandno = 0; bandno < reslevel->nbands ; bandno++){
863	int bandpos = bandno + (reslevelno > 0);
864	Jpeg2000Band *band = reslevel->band + bandno;
865	Jpeg2000Prec *prec = band->prec + precno;
866
867	for (cblkno = 0; cblkno < prec->nb_codeblocks_height * prec->nb_codeblocks_width; cblkno++){
868	Jpeg2000Cblk *cblk = prec->cblk + cblkno;
869
870	cblk->ninclpasses = getcut(cblk, s->lambda,
871	(int64_t)dwt_norms[codsty->transform == FF_DWT53][bandpos][lev] * (int64_t)band->i_stepsize >> 15);
872	}
873	}
874	}
875	}
876	}
877	}
878
879	static int encode_tile(Jpeg2000EncoderContext *s, Jpeg2000Tile *tile, int tileno)
880	{
881	int compno, reslevelno, bandno, ret;
882	Jpeg2000T1Context t1;
883	Jpeg2000CodingStyle *codsty = &s->codsty;
884	for (compno = 0; compno < s->ncomponents; compno++){
885	Jpeg2000Component *comp = s->tile[tileno].comp + compno;
886
887	t1.stride = (1<<codsty->log2_cblk_width) + 2;
888
889	av_log(s->avctx, AV_LOG_DEBUG,"dwt\n");
890	if ((ret = ff_dwt_encode(&comp->dwt, comp->i_data)) < 0)
891	return ret;
892	av_log(s->avctx, AV_LOG_DEBUG,"after dwt -> tier1\n");
893
894	for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++){
895	Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno;
896
897	for (bandno = 0; bandno < reslevel->nbands ; bandno++){
898	Jpeg2000Band *band = reslevel->band + bandno;
899	Jpeg2000Prec *prec = band->prec; // we support only 1 precinct per band ATM in the encoder
900	int cblkx, cblky, cblkno=0, xx0, x0, xx1, y0, yy0, yy1, bandpos;
901	yy0 = bandno == 0 ? 0 : comp->reslevel[reslevelno-1].coord[1][1] - comp->reslevel[reslevelno-1].coord[1][0];
902	y0 = yy0;
903	yy1 = FFMIN(ff_jpeg2000_ceildivpow2(band->coord[1][0] + 1, band->log2_cblk_height) << band->log2_cblk_height,
904	band->coord[1][1]) - band->coord[1][0] + yy0;
905
906	if (band->coord[0][0] == band->coord[0][1] || band->coord[1][0] == band->coord[1][1])
907	continue;
908
909	bandpos = bandno + (reslevelno > 0);
910
911	for (cblky = 0; cblky < prec->nb_codeblocks_height; cblky++){
912	if (reslevelno == 0 || bandno == 1)
913	xx0 = 0;
914	else
915	xx0 = comp->reslevel[reslevelno-1].coord[0][1] - comp->reslevel[reslevelno-1].coord[0][0];
916	x0 = xx0;
917	xx1 = FFMIN(ff_jpeg2000_ceildivpow2(band->coord[0][0] + 1, band->log2_cblk_width) << band->log2_cblk_width,
918	band->coord[0][1]) - band->coord[0][0] + xx0;
919
920	for (cblkx = 0; cblkx < prec->nb_codeblocks_width; cblkx++, cblkno++){
921	int y, x;
922	if (codsty->transform == FF_DWT53){
923	for (y = yy0; y < yy1; y++){
924	int *ptr = t1.data + (y-yy0)*t1.stride;
925	for (x = xx0; x < xx1; x++){
926	*ptr++ = comp->i_data[(comp->coord[0][1] - comp->coord[0][0]) * y + x] << NMSEDEC_FRACBITS;
927	}
928	}
929	} else{
930	for (y = yy0; y < yy1; y++){
931	int *ptr = t1.data + (y-yy0)*t1.stride;
932	for (x = xx0; x < xx1; x++){
933	*ptr = (comp->i_data[(comp->coord[0][1] - comp->coord[0][0]) * y + x]);
934	*ptr = (int64_t)*ptr * (int64_t)(16384 * 65536 / band->i_stepsize) >> 15 - NMSEDEC_FRACBITS;
935	ptr++;
936	}
937	}
938	}
939	encode_cblk(s, &t1, prec->cblk + cblkno, tile, xx1 - xx0, yy1 - yy0,
940	bandpos, codsty->nreslevels - reslevelno - 1);
941	xx0 = xx1;
942	xx1 = FFMIN(xx1 + (1 << band->log2_cblk_width), band->coord[0][1] - band->coord[0][0] + x0);
943	}
944	yy0 = yy1;
945	yy1 = FFMIN(yy1 + (1 << band->log2_cblk_height), band->coord[1][1] - band->coord[1][0] + y0);
946	}
947	}
948	}
949	av_log(s->avctx, AV_LOG_DEBUG, "after tier1\n");
950	}
951
952	av_log(s->avctx, AV_LOG_DEBUG, "rate control\n");
953	truncpasses(s, tile);
954	if ((ret = encode_packets(s, tile, tileno)) < 0)
955	return ret;
956	av_log(s->avctx, AV_LOG_DEBUG, "after rate control\n");
957	return 0;
958	}
959
960	static void cleanup(Jpeg2000EncoderContext *s)
961	{
962	int tileno, compno;
963	Jpeg2000CodingStyle *codsty = &s->codsty;
964
965	for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){
966	for (compno = 0; compno < s->ncomponents; compno++){
967	Jpeg2000Component *comp = s->tile[tileno].comp + compno;
968	ff_jpeg2000_cleanup(comp, codsty);
969	}
970	av_freep(&s->tile[tileno].comp);
971	}
972	av_freep(&s->tile);
973	}
974
975	static void reinit(Jpeg2000EncoderContext *s)
976	{
977	int tileno, compno;
978	for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){
979	Jpeg2000Tile *tile = s->tile + tileno;
980	for (compno = 0; compno < s->ncomponents; compno++)
981	ff_jpeg2000_reinit(tile->comp + compno, &s->codsty);
982	}
983	}
984
985	static void update_size(uint8_t *size, const uint8_t *end)
986	{
987	AV_WB32(size, end-size);
988	}
989
990	static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
991	const AVFrame *pict, int *got_packet)
992	{
993	int tileno, ret;
994	Jpeg2000EncoderContext *s = avctx->priv_data;
995	uint8_t *chunkstart, *jp2cstart, *jp2hstart;
996
997	if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width*avctx->height*9 + AV_INPUT_BUFFER_MIN_SIZE, 0)) < 0)
998	return ret;
999
1000	// init:
1001	s->buf = s->buf_start = pkt->data;
1002	s->buf_end = pkt->data + pkt->size;
1003
1004	s->picture = pict;
1005
1006	s->lambda = s->picture->quality * LAMBDA_SCALE;
1007
1008	copy_frame(s);
1009	reinit(s);
1010
1011	if (s->format == CODEC_JP2) {
1012	av_assert0(s->buf == pkt->data);
1013
1014	bytestream_put_be32(&s->buf, 0x0000000C);
1015	bytestream_put_be32(&s->buf, 0x6A502020);
1016	bytestream_put_be32(&s->buf, 0x0D0A870A);
1017
1018	chunkstart = s->buf;
1019	bytestream_put_be32(&s->buf, 0);
1020	bytestream_put_buffer(&s->buf, "ftyp", 4);
1021	bytestream_put_buffer(&s->buf, "jp2\040\040", 4);
1022	bytestream_put_be32(&s->buf, 0);
1023	bytestream_put_buffer(&s->buf, "jp2\040", 4);
1024	update_size(chunkstart, s->buf);
1025
1026	jp2hstart = s->buf;
1027	bytestream_put_be32(&s->buf, 0);
1028	bytestream_put_buffer(&s->buf, "jp2h", 4);
1029
1030	chunkstart = s->buf;
1031	bytestream_put_be32(&s->buf, 0);
1032	bytestream_put_buffer(&s->buf, "ihdr", 4);
1033	bytestream_put_be32(&s->buf, avctx->height);
1034	bytestream_put_be32(&s->buf, avctx->width);
1035	bytestream_put_be16(&s->buf, s->ncomponents);
1036	bytestream_put_byte(&s->buf, s->cbps[0]);
1037	bytestream_put_byte(&s->buf, 7);
1038	bytestream_put_byte(&s->buf, 0);
1039	bytestream_put_byte(&s->buf, 0);
1040	update_size(chunkstart, s->buf);
1041
1042	chunkstart = s->buf;
1043	bytestream_put_be32(&s->buf, 0);
1044	bytestream_put_buffer(&s->buf, "colr", 4);
1045	bytestream_put_byte(&s->buf, 1);
1046	bytestream_put_byte(&s->buf, 0);
1047	bytestream_put_byte(&s->buf, 0);
1048	if (s->ncomponents == 1) {
1049	bytestream_put_be32(&s->buf, 17);
1050	} else if (avctx->pix_fmt == AV_PIX_FMT_RGB24) {
1051	bytestream_put_be32(&s->buf, 16);
1052	} else {
1053	bytestream_put_be32(&s->buf, 18);
1054	}
1055	update_size(chunkstart, s->buf);
1056	update_size(jp2hstart, s->buf);
1057
1058	jp2cstart = s->buf;
1059	bytestream_put_be32(&s->buf, 0);
1060	bytestream_put_buffer(&s->buf, "jp2c", 4);
1061	}
1062
1063	if (s->buf_end - s->buf < 2)
1064	return -1;
1065	bytestream_put_be16(&s->buf, JPEG2000_SOC);
1066	if ((ret = put_siz(s)) < 0)
1067	return ret;
1068	if ((ret = put_cod(s)) < 0)
1069	return ret;
1070	if ((ret = put_qcd(s, 0)) < 0)
1071	return ret;
1072	if ((ret = put_com(s, 0)) < 0)
1073	return ret;
1074
1075	for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){
1076	uint8_t *psotptr;
1077	if (!(psotptr = put_sot(s, tileno)))
1078	return -1;
1079	if (s->buf_end - s->buf < 2)
1080	return -1;
1081	bytestream_put_be16(&s->buf, JPEG2000_SOD);
1082	if ((ret = encode_tile(s, s->tile + tileno, tileno)) < 0)
1083	return ret;
1084	bytestream_put_be32(&psotptr, s->buf - psotptr + 6);
1085	}
1086	if (s->buf_end - s->buf < 2)
1087	return -1;
1088	bytestream_put_be16(&s->buf, JPEG2000_EOC);
1089
1090	if (s->format == CODEC_JP2)
1091	update_size(jp2cstart, s->buf);
1092
1093	av_log(s->avctx, AV_LOG_DEBUG, "end\n");
1094	pkt->size = s->buf - s->buf_start;
1095	pkt->flags |= AV_PKT_FLAG_KEY;
1096	*got_packet = 1;
1097
1098	return 0;
1099	}
1100
1101	static av_cold int j2kenc_init(AVCodecContext *avctx)
1102	{
1103	int i, ret;
1104	Jpeg2000EncoderContext *s = avctx->priv_data;
1105	Jpeg2000CodingStyle *codsty = &s->codsty;
1106	Jpeg2000QuantStyle *qntsty = &s->qntsty;
1107
1108	s->avctx = avctx;
1109	av_log(s->avctx, AV_LOG_DEBUG, "init\n");
1110
1111	#if FF_API_PRIVATE_OPT
1112	FF_DISABLE_DEPRECATION_WARNINGS
1113	if (avctx->prediction_method)
1114	s->pred = avctx->prediction_method;
1115	FF_ENABLE_DEPRECATION_WARNINGS
1116	#endif
1117
1118	// defaults:
1119	// TODO: implement setting non-standard precinct size
1120	memset(codsty->log2_prec_widths , 15, sizeof(codsty->log2_prec_widths ));
1121	memset(codsty->log2_prec_heights, 15, sizeof(codsty->log2_prec_heights));
1122	codsty->nreslevels2decode=
1123	codsty->nreslevels = 7;
1124	codsty->log2_cblk_width = 4;
1125	codsty->log2_cblk_height = 4;
1126	codsty->transform = s->pred ? FF_DWT53 : FF_DWT97_INT;
1127
1128	qntsty->nguardbits = 1;
1129
1130	if ((s->tile_width & (s->tile_width -1)) ||
1131	(s->tile_height & (s->tile_height-1))) {
1132	av_log(avctx, AV_LOG_WARNING, "Tile dimension not a power of 2\n");
1133	}
1134
1135	if (codsty->transform == FF_DWT53)
1136	qntsty->quantsty = JPEG2000_QSTY_NONE;
1137	else
1138	qntsty->quantsty = JPEG2000_QSTY_SE;
1139
1140	s->width = avctx->width;
1141	s->height = avctx->height;
1142
1143	for (i = 0; i < 3; i++)
1144	s->cbps[i] = 8;
1145
1146	if (avctx->pix_fmt == AV_PIX_FMT_RGB24){
1147	s->ncomponents = 3;
1148	} else if (avctx->pix_fmt == AV_PIX_FMT_GRAY8){
1149	s->ncomponents = 1;
1150	} else{ // planar YUV
1151	s->planar = 1;
1152	s->ncomponents = 3;
1153	avcodec_get_chroma_sub_sample(avctx->pix_fmt,
1154	s->chroma_shift, s->chroma_shift + 1);
1155	}
1156
1157	ff_jpeg2000_init_tier1_luts();
1158	ff_mqc_init_context_tables();
1159	init_luts();
1160
1161	init_quantization(s);
1162	if ((ret=init_tiles(s)) < 0)
1163	return ret;
1164
1165	av_log(s->avctx, AV_LOG_DEBUG, "after init\n");
1166
1167	return 0;
1168	}
1169
1170	static int j2kenc_destroy(AVCodecContext *avctx)
1171	{
1172	Jpeg2000EncoderContext *s = avctx->priv_data;
1173
1174	cleanup(s);
1175	return 0;
1176	}
1177
1178	// taken from the libopenjpeg wraper so it matches
1179
1180	#define OFFSET(x) offsetof(Jpeg2000EncoderContext, x)
1181	#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1182	static const AVOption options[] = {
1183	{ "format", "Codec Format", OFFSET(format), AV_OPT_TYPE_INT, { .i64 = CODEC_JP2 }, CODEC_J2K, CODEC_JP2, VE, "format" },
1184	{ "j2k", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CODEC_J2K }, 0, 0, VE, "format" },
1185	{ "jp2", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CODEC_JP2 }, 0, 0, VE, "format" },
1186	{ "tile_width", "Tile Width", OFFSET(tile_width), AV_OPT_TYPE_INT, { .i64 = 256 }, 1, 1<<30, VE, },
1187	{ "tile_height", "Tile Height", OFFSET(tile_height), AV_OPT_TYPE_INT, { .i64 = 256 }, 1, 1<<30, VE, },
1188	{ "pred", "DWT Type", OFFSET(pred), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE, "pred" },
1189	{ "dwt97int", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, VE, "pred" },
1190	{ "dwt53", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, VE, "pred" },
1191
1192	{ NULL }
1193	};
1194
1195	static const AVClass j2k_class = {
1196	.class_name = "jpeg 2000 encoder",
1197	.item_name = av_default_item_name,
1198	.option = options,
1199	.version = LIBAVUTIL_VERSION_INT,
1200	};
1201
1202	AVCodec ff_jpeg2000_encoder = {
1203	.name = "jpeg2000",
1204	.long_name = NULL_IF_CONFIG_SMALL("JPEG 2000"),
1205	.type = AVMEDIA_TYPE_VIDEO,
1206	.id = AV_CODEC_ID_JPEG2000,
1207	.priv_data_size = sizeof(Jpeg2000EncoderContext),
1208	.init = j2kenc_init,
1209	.encode2 = encode_frame,
1210	.close = j2kenc_destroy,
1211	.pix_fmts = (const enum AVPixelFormat[]) {
1212	AV_PIX_FMT_RGB24, AV_PIX_FMT_YUV444P, AV_PIX_FMT_GRAY8,
1213	AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
1214	AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
1215	AV_PIX_FMT_NONE
1216	},
1217	.priv_class = &j2k_class,
1218	};
1219