FFmpeg: libavcodec/j2kenc.c Source File

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j2kenc.c

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1 /*

2 * JPEG2000 image encoder

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 */

22 /**

23 * JPEG2000 image encoder

24 * @file

25 * @author Kamil Nowosad

26 */

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"

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))

40 static 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];

45 static 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}},

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 };

57 typedef struct {

58 Jpeg2000Component *comp;

59 } Jpeg2000Tile;

61 typedef struct {

62 AVCodecContext *avctx;

63 const AVFrame *picture;

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;

73 uint8_t *buf_start;

74 uint8_t *buf;

75 uint8_t *buf_end;

76 int bit_index;

78 int64_t lambda;

80 Jpeg2000CodingStyle codsty;

81 Jpeg2000QuantStyle qntsty;

83 Jpeg2000Tile *tile;

84 } Jpeg2000EncoderContext;

87 /* debug */

88 #if 0

89 #undef ifprintf

90 #undef printf

92 static void nspaces(FILE *fd, int n)

93 {

94 while(n--) putc(' ', fd);

95 }

97 static 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

104 static 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 */

160 static 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 */

173 static 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 */

180 static 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 */

191 static 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 */

219 static 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

231 static 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

260 static 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

287 static 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

313 static 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 */

337 static 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

383 static 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

421 static 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

451 static 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 */

469 static 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

476 static 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

483 static 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

505 static 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

519 static 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

574 static 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

633 static 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

648 static 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

743 static 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

766 static 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

784 static 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

813 static 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

892 static 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

907 static 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

917 static 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

970 static 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

1030 static int j2kenc_destroy(AVCodecContext *avctx)

1031 {

1032 Jpeg2000EncoderContext *s = avctx->priv_data;

1033

1034 cleanup(s);

1035 return 0;

1036 }

1037

1038 AVCodec 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 };

Generated on Sun Mar 8 2015 02:34:54 for FFmpeg by doxygen 1.8.2