Add ff_ prefix to data symbols of encoders, decoders, hwaccel, parsers, bsf.
[libav.git] / libavcodec / mjpegdec.c
1 /*
2 * MJPEG decoder
3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2003 Alex Beregszaszi
5 * Copyright (c) 2003-2004 Michael Niedermayer
6 *
7 * Support for external huffman table, various fixes (AVID workaround),
8 * aspecting, new decode_frame mechanism and apple mjpeg-b support
9 * by Alex Beregszaszi
10 *
11 * This file is part of FFmpeg.
12 *
13 * FFmpeg is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU Lesser General Public
15 * License as published by the Free Software Foundation; either
16 * version 2.1 of the License, or (at your option) any later version.
17 *
18 * FFmpeg is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * Lesser General Public License for more details.
22 *
23 * You should have received a copy of the GNU Lesser General Public
24 * License along with FFmpeg; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 */
27
28 /**
29 * @file
30 * MJPEG decoder.
31 */
32
33 //#define DEBUG
34 #include <assert.h>
35
36 #include "libavcore/imgutils.h"
37 #include "avcodec.h"
38 #include "dsputil.h"
39 #include "mjpeg.h"
40 #include "mjpegdec.h"
41 #include "jpeglsdec.h"
42
43
44 static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table,
45 int nb_codes, int use_static, int is_ac)
46 {
47 uint8_t huff_size[256];
48 uint16_t huff_code[256];
49 uint16_t huff_sym[256];
50 int i;
51
52 assert(nb_codes <= 256);
53
54 memset(huff_size, 0, sizeof(huff_size));
55 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
56
57 for(i=0; i<256; i++)
58 huff_sym[i]= i + 16*is_ac;
59
60 if(is_ac) huff_sym[0]= 16*256;
61
62 return init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2, huff_sym, 2, 2, use_static);
63 }
64
65 static void build_basic_mjpeg_vlc(MJpegDecodeContext * s) {
66 build_vlc(&s->vlcs[0][0], ff_mjpeg_bits_dc_luminance,
67 ff_mjpeg_val_dc, 12, 0, 0);
68 build_vlc(&s->vlcs[0][1], ff_mjpeg_bits_dc_chrominance,
69 ff_mjpeg_val_dc, 12, 0, 0);
70 build_vlc(&s->vlcs[1][0], ff_mjpeg_bits_ac_luminance,
71 ff_mjpeg_val_ac_luminance, 251, 0, 1);
72 build_vlc(&s->vlcs[1][1], ff_mjpeg_bits_ac_chrominance,
73 ff_mjpeg_val_ac_chrominance, 251, 0, 1);
74 build_vlc(&s->vlcs[2][0], ff_mjpeg_bits_ac_luminance,
75 ff_mjpeg_val_ac_luminance, 251, 0, 0);
76 build_vlc(&s->vlcs[2][1], ff_mjpeg_bits_ac_chrominance,
77 ff_mjpeg_val_ac_chrominance, 251, 0, 0);
78 }
79
80 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
81 {
82 MJpegDecodeContext *s = avctx->priv_data;
83
84 s->avctx = avctx;
85 dsputil_init(&s->dsp, avctx);
86 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
87 s->buffer_size = 0;
88 s->buffer = NULL;
89 s->start_code = -1;
90 s->first_picture = 1;
91 s->org_height = avctx->coded_height;
92 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
93
94 build_basic_mjpeg_vlc(s);
95
96 if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
97 {
98 av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
99 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size*8);
100 if (ff_mjpeg_decode_dht(s)) {
101 av_log(avctx, AV_LOG_ERROR, "mjpeg: error using external huffman table, switching back to internal\n");
102 build_basic_mjpeg_vlc(s);
103 }
104 }
105 if (avctx->extradata_size > 9 &&
106 AV_RL32(avctx->extradata + 4) == MKTAG('f','i','e','l')) {
107 if (avctx->extradata[9] == 6) { /* quicktime icefloe 019 */
108 s->interlace_polarity = 1; /* bottom field first */
109 av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
110 }
111 }
112 if (avctx->codec->id == CODEC_ID_AMV)
113 s->flipped = 1;
114
115 return 0;
116 }
117
118
119 /* quantize tables */
120 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
121 {
122 int len, index, i, j;
123
124 len = get_bits(&s->gb, 16) - 2;
125
126 while (len >= 65) {
127 /* only 8 bit precision handled */
128 if (get_bits(&s->gb, 4) != 0)
129 {
130 av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
131 return -1;
132 }
133 index = get_bits(&s->gb, 4);
134 if (index >= 4)
135 return -1;
136 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
137 /* read quant table */
138 for(i=0;i<64;i++) {
139 j = s->scantable.permutated[i];
140 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
141 }
142
143 //XXX FIXME finetune, and perhaps add dc too
144 s->qscale[index]= FFMAX(
145 s->quant_matrixes[index][s->scantable.permutated[1]],
146 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
147 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n", index, s->qscale[index]);
148 len -= 65;
149 }
150
151 return 0;
152 }
153
154 /* decode huffman tables and build VLC decoders */
155 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
156 {
157 int len, index, i, class, n, v, code_max;
158 uint8_t bits_table[17];
159 uint8_t val_table[256];
160
161 len = get_bits(&s->gb, 16) - 2;
162
163 while (len > 0) {
164 if (len < 17)
165 return -1;
166 class = get_bits(&s->gb, 4);
167 if (class >= 2)
168 return -1;
169 index = get_bits(&s->gb, 4);
170 if (index >= 4)
171 return -1;
172 n = 0;
173 for(i=1;i<=16;i++) {
174 bits_table[i] = get_bits(&s->gb, 8);
175 n += bits_table[i];
176 }
177 len -= 17;
178 if (len < n || n > 256)
179 return -1;
180
181 code_max = 0;
182 for(i=0;i<n;i++) {
183 v = get_bits(&s->gb, 8);
184 if (v > code_max)
185 code_max = v;
186 val_table[i] = v;
187 }
188 len -= n;
189
190 /* build VLC and flush previous vlc if present */
191 free_vlc(&s->vlcs[class][index]);
192 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
193 class, index, code_max + 1);
194 if(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1, 0, class > 0) < 0){
195 return -1;
196 }
197
198 if(class>0){
199 free_vlc(&s->vlcs[2][index]);
200 if(build_vlc(&s->vlcs[2][index], bits_table, val_table, code_max + 1, 0, 0) < 0){
201 return -1;
202 }
203 }
204 }
205 return 0;
206 }
207
208 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
209 {
210 int len, nb_components, i, width, height, pix_fmt_id;
211
212 /* XXX: verify len field validity */
213 len = get_bits(&s->gb, 16);
214 s->bits= get_bits(&s->gb, 8);
215
216 if(s->pegasus_rct) s->bits=9;
217 if(s->bits==9 && !s->pegasus_rct) s->rct=1; //FIXME ugly
218
219 if (s->bits != 8 && !s->lossless){
220 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
221 return -1;
222 }
223
224 height = get_bits(&s->gb, 16);
225 width = get_bits(&s->gb, 16);
226
227 //HACK for odd_height.mov
228 if(s->interlaced && s->width == width && s->height == height + 1)
229 height= s->height;
230
231 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
232 if(av_image_check_size(width, height, 0, s->avctx))
233 return -1;
234
235 nb_components = get_bits(&s->gb, 8);
236 if (nb_components <= 0 ||
237 nb_components > MAX_COMPONENTS)
238 return -1;
239 if (s->ls && !(s->bits <= 8 || nb_components == 1)){
240 av_log(s->avctx, AV_LOG_ERROR, "only <= 8 bits/component or 16-bit gray accepted for JPEG-LS\n");
241 return -1;
242 }
243 s->nb_components = nb_components;
244 s->h_max = 1;
245 s->v_max = 1;
246 for(i=0;i<nb_components;i++) {
247 /* component id */
248 s->component_id[i] = get_bits(&s->gb, 8) - 1;
249 s->h_count[i] = get_bits(&s->gb, 4);
250 s->v_count[i] = get_bits(&s->gb, 4);
251 /* compute hmax and vmax (only used in interleaved case) */
252 if (s->h_count[i] > s->h_max)
253 s->h_max = s->h_count[i];
254 if (s->v_count[i] > s->v_max)
255 s->v_max = s->v_count[i];
256 s->quant_index[i] = get_bits(&s->gb, 8);
257 if (s->quant_index[i] >= 4)
258 return -1;
259 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n", i, s->h_count[i],
260 s->v_count[i], s->component_id[i], s->quant_index[i]);
261 }
262
263 if(s->ls && (s->h_max > 1 || s->v_max > 1)) {
264 av_log(s->avctx, AV_LOG_ERROR, "Subsampling in JPEG-LS is not supported.\n");
265 return -1;
266 }
267
268 if(s->v_max==1 && s->h_max==1 && s->lossless==1) s->rgb=1;
269
270 /* if different size, realloc/alloc picture */
271 /* XXX: also check h_count and v_count */
272 if (width != s->width || height != s->height) {
273 av_freep(&s->qscale_table);
274
275 s->width = width;
276 s->height = height;
277 s->interlaced = 0;
278
279 /* test interlaced mode */
280 if (s->first_picture &&
281 s->org_height != 0 &&
282 s->height < ((s->org_height * 3) / 4)) {
283 s->interlaced = 1;
284 s->bottom_field = s->interlace_polarity;
285 s->picture.interlaced_frame = 1;
286 s->picture.top_field_first = !s->interlace_polarity;
287 height *= 2;
288 }
289
290 avcodec_set_dimensions(s->avctx, width, height);
291
292 s->qscale_table= av_mallocz((s->width+15)/16);
293
294 s->first_picture = 0;
295 }
296
297 if(s->interlaced && (s->bottom_field == !s->interlace_polarity))
298 return 0;
299
300 /* XXX: not complete test ! */
301 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
302 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
303 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
304 (s->h_count[3] << 4) | s->v_count[3];
305 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
306 //NOTE we do not allocate pictures large enough for the possible padding of h/v_count being 4
307 if(!(pix_fmt_id & 0xD0D0D0D0))
308 pix_fmt_id-= (pix_fmt_id & 0xF0F0F0F0)>>1;
309 if(!(pix_fmt_id & 0x0D0D0D0D))
310 pix_fmt_id-= (pix_fmt_id & 0x0F0F0F0F)>>1;
311
312 switch(pix_fmt_id){
313 case 0x11111100:
314 if(s->rgb){
315 s->avctx->pix_fmt = PIX_FMT_BGRA;
316 }else
317 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
318 assert(s->nb_components==3);
319 break;
320 case 0x11000000:
321 s->avctx->pix_fmt = PIX_FMT_GRAY8;
322 break;
323 case 0x12111100:
324 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV440P : PIX_FMT_YUVJ440P;
325 break;
326 case 0x21111100:
327 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
328 break;
329 case 0x22111100:
330 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P;
331 break;
332 default:
333 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
334 return -1;
335 }
336 if(s->ls){
337 if(s->nb_components > 1)
338 s->avctx->pix_fmt = PIX_FMT_RGB24;
339 else if(s->bits <= 8)
340 s->avctx->pix_fmt = PIX_FMT_GRAY8;
341 else
342 s->avctx->pix_fmt = PIX_FMT_GRAY16;
343 }
344
345 if(s->picture.data[0])
346 s->avctx->release_buffer(s->avctx, &s->picture);
347
348 s->picture.reference= 0;
349 if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
350 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
351 return -1;
352 }
353 s->picture.pict_type= FF_I_TYPE;
354 s->picture.key_frame= 1;
355 s->got_picture = 1;
356
357 for(i=0; i<3; i++){
358 s->linesize[i]= s->picture.linesize[i] << s->interlaced;
359 }
360
361 // printf("%d %d %d %d %d %d\n", s->width, s->height, s->linesize[0], s->linesize[1], s->interlaced, s->avctx->height);
362
363 if (len != (8+(3*nb_components)))
364 {
365 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
366 }
367
368 /* totally blank picture as progressive JPEG will only add details to it */
369 if(s->progressive){
370 int bw = (width + s->h_max*8-1) / (s->h_max*8);
371 int bh = (height + s->v_max*8-1) / (s->v_max*8);
372 for(i=0; i<s->nb_components; i++) {
373 int size = bw * bh * s->h_count[i] * s->v_count[i];
374 av_freep(&s->blocks[i]);
375 av_freep(&s->last_nnz[i]);
376 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
377 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
378 s->block_stride[i] = bw * s->h_count[i];
379 }
380 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
381 }
382 return 0;
383 }
384
385 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
386 {
387 int code;
388 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
389 if (code < 0)
390 {
391 av_log(s->avctx, AV_LOG_WARNING, "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n", 0, dc_index,
392 &s->vlcs[0][dc_index]);
393 return 0xffff;
394 }
395
396 if(code)
397 return get_xbits(&s->gb, code);
398 else
399 return 0;
400 }
401
402 /* decode block and dequantize */
403 static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
404 int component, int dc_index, int ac_index, int16_t *quant_matrix)
405 {
406 int code, i, j, level, val;
407
408 /* DC coef */
409 val = mjpeg_decode_dc(s, dc_index);
410 if (val == 0xffff) {
411 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
412 return -1;
413 }
414 val = val * quant_matrix[0] + s->last_dc[component];
415 s->last_dc[component] = val;
416 block[0] = val;
417 /* AC coefs */
418 i = 0;
419 {OPEN_READER(re, &s->gb);
420 do {
421 UPDATE_CACHE(re, &s->gb);
422 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
423
424 i += ((unsigned)code) >> 4;
425 code &= 0xf;
426 if(code){
427 if(code > MIN_CACHE_BITS - 16){
428 UPDATE_CACHE(re, &s->gb);
429 }
430 {
431 int cache=GET_CACHE(re,&s->gb);
432 int sign=(~cache)>>31;
433 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
434 }
435
436 LAST_SKIP_BITS(re, &s->gb, code);
437
438 if (i > 63) {
439 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
440 return -1;
441 }
442 j = s->scantable.permutated[i];
443 block[j] = level * quant_matrix[j];
444 }
445 }while(i<63);
446 CLOSE_READER(re, &s->gb);}
447
448 return 0;
449 }
450
451 static int decode_dc_progressive(MJpegDecodeContext *s, DCTELEM *block, int component,
452 int dc_index, int16_t *quant_matrix, int Al)
453 {
454 int val;
455 s->dsp.clear_block(block);
456 val = mjpeg_decode_dc(s, dc_index);
457 if (val == 0xffff) {
458 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
459 return -1;
460 }
461 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
462 s->last_dc[component] = val;
463 block[0] = val;
464 return 0;
465 }
466
467 /* decode block and dequantize - progressive JPEG version */
468 static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz,
469 int ac_index, int16_t *quant_matrix,
470 int ss, int se, int Al, int *EOBRUN)
471 {
472 int code, i, j, level, val, run;
473
474 if(*EOBRUN){
475 (*EOBRUN)--;
476 return 0;
477 }
478 {OPEN_READER(re, &s->gb);
479 for(i=ss;;i++) {
480 UPDATE_CACHE(re, &s->gb);
481 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
482
483 run = ((unsigned) code) >> 4;
484 code &= 0xF;
485 if(code) {
486 i += run;
487 if(code > MIN_CACHE_BITS - 16){
488 UPDATE_CACHE(re, &s->gb);
489 }
490 {
491 int cache=GET_CACHE(re,&s->gb);
492 int sign=(~cache)>>31;
493 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
494 }
495
496 LAST_SKIP_BITS(re, &s->gb, code);
497
498 if (i >= se) {
499 if(i == se){
500 j = s->scantable.permutated[se];
501 block[j] = level * quant_matrix[j] << Al;
502 break;
503 }
504 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
505 return -1;
506 }
507 j = s->scantable.permutated[i];
508 block[j] = level * quant_matrix[j] << Al;
509 }else{
510 if(run == 0xF){// ZRL - skip 15 coefficients
511 i += 15;
512 if (i >= se) {
513 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
514 return -1;
515 }
516 }else{
517 val = (1 << run);
518 if(run){
519 UPDATE_CACHE(re, &s->gb);
520 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
521 LAST_SKIP_BITS(re, &s->gb, run);
522 }
523 *EOBRUN = val - 1;
524 break;
525 }
526 }
527 }
528 CLOSE_READER(re, &s->gb);}
529 if(i > *last_nnz)
530 *last_nnz = i;
531 return 0;
532 }
533
534 #define REFINE_BIT(j) {\
535 UPDATE_CACHE(re, &s->gb);\
536 sign = block[j]>>15;\
537 block[j] += SHOW_UBITS(re, &s->gb, 1) * ((quant_matrix[j]^sign)-sign) << Al;\
538 LAST_SKIP_BITS(re, &s->gb, 1);\
539 }
540
541 #define ZERO_RUN \
542 for(;;i++) {\
543 if(i > last) {\
544 i += run;\
545 if(i > se) {\
546 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);\
547 return -1;\
548 }\
549 break;\
550 }\
551 j = s->scantable.permutated[i];\
552 if(block[j])\
553 REFINE_BIT(j)\
554 else if(run-- == 0)\
555 break;\
556 }
557
558 /* decode block and dequantize - progressive JPEG refinement pass */
559 static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz,
560 int ac_index, int16_t *quant_matrix,
561 int ss, int se, int Al, int *EOBRUN)
562 {
563 int code, i=ss, j, sign, val, run;
564 int last = FFMIN(se, *last_nnz);
565
566 OPEN_READER(re, &s->gb);
567 if(*EOBRUN)
568 (*EOBRUN)--;
569 else {
570 for(;;i++) {
571 UPDATE_CACHE(re, &s->gb);
572 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
573
574 if(code & 0xF) {
575 run = ((unsigned) code) >> 4;
576 UPDATE_CACHE(re, &s->gb);
577 val = SHOW_UBITS(re, &s->gb, 1);
578 LAST_SKIP_BITS(re, &s->gb, 1);
579 ZERO_RUN;
580 j = s->scantable.permutated[i];
581 val--;
582 block[j] = ((quant_matrix[j]^val)-val) << Al;
583 if(i == se) {
584 if(i > *last_nnz)
585 *last_nnz = i;
586 CLOSE_READER(re, &s->gb);
587 return 0;
588 }
589 }else{
590 run = ((unsigned) code) >> 4;
591 if(run == 0xF){
592 ZERO_RUN;
593 }else{
594 val = run;
595 run = (1 << run);
596 if(val) {
597 UPDATE_CACHE(re, &s->gb);
598 run += SHOW_UBITS(re, &s->gb, val);
599 LAST_SKIP_BITS(re, &s->gb, val);
600 }
601 *EOBRUN = run - 1;
602 break;
603 }
604 }
605 }
606
607 if(i > *last_nnz)
608 *last_nnz = i;
609 }
610
611 for(;i<=last;i++) {
612 j = s->scantable.permutated[i];
613 if(block[j])
614 REFINE_BIT(j)
615 }
616 CLOSE_READER(re, &s->gb);
617
618 return 0;
619 }
620 #undef REFINE_BIT
621 #undef ZERO_RUN
622
623 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){
624 int i, mb_x, mb_y;
625 uint16_t (*buffer)[4];
626 int left[3], top[3], topleft[3];
627 const int linesize= s->linesize[0];
628 const int mask= (1<<s->bits)-1;
629
630 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size, (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
631 buffer= s->ljpeg_buffer;
632
633 for(i=0; i<3; i++){
634 buffer[0][i]= 1 << (s->bits + point_transform - 1);
635 }
636 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
637 const int modified_predictor= mb_y ? predictor : 1;
638 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
639
640 if (s->interlaced && s->bottom_field)
641 ptr += linesize >> 1;
642
643 for(i=0; i<3; i++){
644 top[i]= left[i]= topleft[i]= buffer[0][i];
645 }
646 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
647 if (s->restart_interval && !s->restart_count)
648 s->restart_count = s->restart_interval;
649
650 for(i=0;i<3;i++) {
651 int pred;
652
653 topleft[i]= top[i];
654 top[i]= buffer[mb_x][i];
655
656 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
657
658 left[i]=
659 buffer[mb_x][i]= mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
660 }
661
662 if (s->restart_interval && !--s->restart_count) {
663 align_get_bits(&s->gb);
664 skip_bits(&s->gb, 16); /* skip RSTn */
665 }
666 }
667
668 if(s->rct){
669 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
670 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200)>>2);
671 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
672 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
673 }
674 }else if(s->pegasus_rct){
675 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
676 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2])>>2);
677 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
678 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
679 }
680 }else{
681 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
682 ptr[4*mb_x+0] = buffer[mb_x][2];
683 ptr[4*mb_x+1] = buffer[mb_x][1];
684 ptr[4*mb_x+2] = buffer[mb_x][0];
685 }
686 }
687 }
688 return 0;
689 }
690
691 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point_transform){
692 int i, mb_x, mb_y;
693 const int nb_components=3;
694
695 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
696 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
697 if (s->restart_interval && !s->restart_count)
698 s->restart_count = s->restart_interval;
699
700 if(mb_x==0 || mb_y==0 || s->interlaced){
701 for(i=0;i<nb_components;i++) {
702 uint8_t *ptr;
703 int n, h, v, x, y, c, j, linesize;
704 n = s->nb_blocks[i];
705 c = s->comp_index[i];
706 h = s->h_scount[i];
707 v = s->v_scount[i];
708 x = 0;
709 y = 0;
710 linesize= s->linesize[c];
711
712 for(j=0; j<n; j++) {
713 int pred;
714
715 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
716 if(y==0 && mb_y==0){
717 if(x==0 && mb_x==0){
718 pred= 128 << point_transform;
719 }else{
720 pred= ptr[-1];
721 }
722 }else{
723 if(x==0 && mb_x==0){
724 pred= ptr[-linesize];
725 }else{
726 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
727 }
728 }
729
730 if (s->interlaced && s->bottom_field)
731 ptr += linesize >> 1;
732 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
733
734 if (++x == h) {
735 x = 0;
736 y++;
737 }
738 }
739 }
740 }else{
741 for(i=0;i<nb_components;i++) {
742 uint8_t *ptr;
743 int n, h, v, x, y, c, j, linesize;
744 n = s->nb_blocks[i];
745 c = s->comp_index[i];
746 h = s->h_scount[i];
747 v = s->v_scount[i];
748 x = 0;
749 y = 0;
750 linesize= s->linesize[c];
751
752 for(j=0; j<n; j++) {
753 int pred;
754
755 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
756 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
757 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
758 if (++x == h) {
759 x = 0;
760 y++;
761 }
762 }
763 }
764 }
765 if (s->restart_interval && !--s->restart_count) {
766 align_get_bits(&s->gb);
767 skip_bits(&s->gb, 16); /* skip RSTn */
768 }
769 }
770 }
771 return 0;
772 }
773
774 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah, int Al){
775 int i, mb_x, mb_y;
776 uint8_t* data[MAX_COMPONENTS];
777 int linesize[MAX_COMPONENTS];
778
779 if(s->flipped && s->avctx->flags & CODEC_FLAG_EMU_EDGE) {
780 av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with CODEC_FLAG_EMU_EDGE set!\n");
781 s->flipped = 0;
782 }
783 for(i=0; i < nb_components; i++) {
784 int c = s->comp_index[i];
785 data[c] = s->picture.data[c];
786 linesize[c]=s->linesize[c];
787 s->coefs_finished[c] |= 1;
788 if(s->flipped) {
789 //picture should be flipped upside-down for this codec
790 data[c] += (linesize[c] * (s->v_scount[i] * (8 * s->mb_height -((s->height/s->v_max)&7)) - 1 ));
791 linesize[c] *= -1;
792 }
793 }
794
795 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
796 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
797 if (s->restart_interval && !s->restart_count)
798 s->restart_count = s->restart_interval;
799
800 for(i=0;i<nb_components;i++) {
801 uint8_t *ptr;
802 int n, h, v, x, y, c, j;
803 n = s->nb_blocks[i];
804 c = s->comp_index[i];
805 h = s->h_scount[i];
806 v = s->v_scount[i];
807 x = 0;
808 y = 0;
809 for(j=0;j<n;j++) {
810 ptr = data[c] +
811 (((linesize[c] * (v * mb_y + y) * 8) +
812 (h * mb_x + x) * 8) >> s->avctx->lowres);
813 if(s->interlaced && s->bottom_field)
814 ptr += linesize[c] >> 1;
815 if(!s->progressive) {
816 s->dsp.clear_block(s->block);
817 if(decode_block(s, s->block, i,
818 s->dc_index[i], s->ac_index[i],
819 s->quant_matrixes[ s->quant_index[c] ]) < 0) {
820 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
821 return -1;
822 }
823 s->dsp.idct_put(ptr, linesize[c], s->block);
824 } else {
825 int block_idx = s->block_stride[c] * (v * mb_y + y) + (h * mb_x + x);
826 DCTELEM *block = s->blocks[c][block_idx];
827 if(Ah)
828 block[0] += get_bits1(&s->gb) * s->quant_matrixes[ s->quant_index[c] ][0] << Al;
829 else if(decode_dc_progressive(s, block, i, s->dc_index[i], s->quant_matrixes[ s->quant_index[c] ], Al) < 0) {
830 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
831 return -1;
832 }
833 }
834 // av_log(s->avctx, AV_LOG_DEBUG, "mb: %d %d processed\n", mb_y, mb_x);
835 //av_log(NULL, AV_LOG_DEBUG, "%d %d %d %d %d %d %d %d \n", mb_x, mb_y, x, y, c, s->bottom_field, (v * mb_y + y) * 8, (h * mb_x + x) * 8);
836 if (++x == h) {
837 x = 0;
838 y++;
839 }
840 }
841 }
842
843 if (s->restart_interval && !--s->restart_count) {
844 align_get_bits(&s->gb);
845 skip_bits(&s->gb, 16); /* skip RSTn */
846 for (i=0; i<nb_components; i++) /* reset dc */
847 s->last_dc[i] = 1024;
848 }
849 }
850 }
851 return 0;
852 }
853
854 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss, int se, int Ah, int Al){
855 int mb_x, mb_y;
856 int EOBRUN = 0;
857 int c = s->comp_index[0];
858 uint8_t* data = s->picture.data[c];
859 int linesize = s->linesize[c];
860 int last_scan = 0;
861 int16_t *quant_matrix = s->quant_matrixes[ s->quant_index[c] ];
862
863 if(!Al) {
864 s->coefs_finished[c] |= (1LL<<(se+1))-(1LL<<ss);
865 last_scan = !~s->coefs_finished[c];
866 }
867
868 if(s->interlaced && s->bottom_field)
869 data += linesize >> 1;
870
871 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
872 uint8_t *ptr = data + (mb_y*linesize*8 >> s->avctx->lowres);
873 int block_idx = mb_y * s->block_stride[c];
874 DCTELEM (*block)[64] = &s->blocks[c][block_idx];
875 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
876 for(mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
877 int ret;
878 if(Ah)
879 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
880 quant_matrix, ss, se, Al, &EOBRUN);
881 else
882 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
883 quant_matrix, ss, se, Al, &EOBRUN);
884 if(ret < 0) {
885 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
886 return -1;
887 }
888 if(last_scan) {
889 s->dsp.idct_put(ptr, linesize, *block);
890 ptr += 8 >> s->avctx->lowres;
891 }
892 }
893 }
894 return 0;
895 }
896
897 int ff_mjpeg_decode_sos(MJpegDecodeContext *s)
898 {
899 int len, nb_components, i, h, v, predictor, point_transform;
900 int index, id;
901 const int block_size= s->lossless ? 1 : 8;
902 int ilv, prev_shift;
903
904 /* XXX: verify len field validity */
905 len = get_bits(&s->gb, 16);
906 nb_components = get_bits(&s->gb, 8);
907 if (nb_components == 0 || nb_components > MAX_COMPONENTS){
908 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: nb_components (%d) unsupported\n", nb_components);
909 return -1;
910 }
911 if (len != 6+2*nb_components)
912 {
913 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
914 return -1;
915 }
916 for(i=0;i<nb_components;i++) {
917 id = get_bits(&s->gb, 8) - 1;
918 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
919 /* find component index */
920 for(index=0;index<s->nb_components;index++)
921 if (id == s->component_id[index])
922 break;
923 if (index == s->nb_components)
924 {
925 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: index(%d) out of components\n", index);
926 return -1;
927 }
928 /* Metasoft MJPEG codec has Cb and Cr swapped */
929 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
930 && nb_components == 3 && s->nb_components == 3 && i)
931 index = 3 - i;
932
933 s->comp_index[i] = index;
934
935 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
936 s->h_scount[i] = s->h_count[index];
937 s->v_scount[i] = s->v_count[index];
938
939 s->dc_index[i] = get_bits(&s->gb, 4);
940 s->ac_index[i] = get_bits(&s->gb, 4);
941
942 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
943 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
944 goto out_of_range;
945 if (!s->vlcs[0][s->dc_index[i]].table || !s->vlcs[1][s->ac_index[i]].table)
946 goto out_of_range;
947 }
948
949 predictor= get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
950 ilv= get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
951 prev_shift = get_bits(&s->gb, 4); /* Ah */
952 point_transform= get_bits(&s->gb, 4); /* Al */
953
954 for(i=0;i<nb_components;i++)
955 s->last_dc[i] = 1024;
956
957 if (nb_components > 1) {
958 /* interleaved stream */
959 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
960 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
961 } else if(!s->ls) { /* skip this for JPEG-LS */
962 h = s->h_max / s->h_scount[0];
963 v = s->v_max / s->v_scount[0];
964 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
965 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
966 s->nb_blocks[0] = 1;
967 s->h_scount[0] = 1;
968 s->v_scount[0] = 1;
969 }
970
971 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
972 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n", s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
973 predictor, point_transform, ilv, s->bits,
974 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
975
976
977 /* mjpeg-b can have padding bytes between sos and image data, skip them */
978 for (i = s->mjpb_skiptosod; i > 0; i--)
979 skip_bits(&s->gb, 8);
980
981 if(s->lossless){
982 if(CONFIG_JPEGLS_DECODER && s->ls){
983 // for(){
984 // reset_ls_coding_parameters(s, 0);
985
986 if(ff_jpegls_decode_picture(s, predictor, point_transform, ilv) < 0)
987 return -1;
988 }else{
989 if(s->rgb){
990 if(ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)
991 return -1;
992 }else{
993 if(ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0)
994 return -1;
995 }
996 }
997 }else{
998 if(s->progressive && predictor) {
999 if(mjpeg_decode_scan_progressive_ac(s, predictor, ilv, prev_shift, point_transform) < 0)
1000 return -1;
1001 } else {
1002 if(mjpeg_decode_scan(s, nb_components, prev_shift, point_transform) < 0)
1003 return -1;
1004 }
1005 }
1006 emms_c();
1007 return 0;
1008 out_of_range:
1009 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1010 return -1;
1011 }
1012
1013 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1014 {
1015 if (get_bits(&s->gb, 16) != 4)
1016 return -1;
1017 s->restart_interval = get_bits(&s->gb, 16);
1018 s->restart_count = 0;
1019 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n", s->restart_interval);
1020
1021 return 0;
1022 }
1023
1024 static int mjpeg_decode_app(MJpegDecodeContext *s)
1025 {
1026 int len, id, i;
1027
1028 len = get_bits(&s->gb, 16);
1029 if (len < 5)
1030 return -1;
1031 if(8*len + get_bits_count(&s->gb) > s->gb.size_in_bits)
1032 return -1;
1033
1034 id = get_bits_long(&s->gb, 32);
1035 id = av_be2ne32(id);
1036 len -= 6;
1037
1038 if(s->avctx->debug & FF_DEBUG_STARTCODE){
1039 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1040 }
1041
1042 /* buggy AVID, it puts EOI only at every 10th frame */
1043 /* also this fourcc is used by non-avid files too, it holds some
1044 informations, but it's always present in AVID creates files */
1045 if (id == AV_RL32("AVI1"))
1046 {
1047 /* structure:
1048 4bytes AVI1
1049 1bytes polarity
1050 1bytes always zero
1051 4bytes field_size
1052 4bytes field_size_less_padding
1053 */
1054 s->buggy_avid = 1;
1055 // if (s->first_picture)
1056 // printf("mjpeg: workarounding buggy AVID\n");
1057 i = get_bits(&s->gb, 8);
1058 if (i==2) s->bottom_field= 1;
1059 else if(i==1) s->bottom_field= 0;
1060 #if 0
1061 skip_bits(&s->gb, 8);
1062 skip_bits(&s->gb, 32);
1063 skip_bits(&s->gb, 32);
1064 len -= 10;
1065 #endif
1066 // if (s->interlace_polarity)
1067 // printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
1068 goto out;
1069 }
1070
1071 // len -= 2;
1072
1073 if (id == AV_RL32("JFIF"))
1074 {
1075 int t_w, t_h, v1, v2;
1076 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1077 v1= get_bits(&s->gb, 8);
1078 v2= get_bits(&s->gb, 8);
1079 skip_bits(&s->gb, 8);
1080
1081 s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 16);
1082 s->avctx->sample_aspect_ratio.den= get_bits(&s->gb, 16);
1083
1084 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1085 av_log(s->avctx, AV_LOG_INFO, "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1086 v1, v2,
1087 s->avctx->sample_aspect_ratio.num,
1088 s->avctx->sample_aspect_ratio.den
1089 );
1090
1091 t_w = get_bits(&s->gb, 8);
1092 t_h = get_bits(&s->gb, 8);
1093 if (t_w && t_h)
1094 {
1095 /* skip thumbnail */
1096 if (len-10-(t_w*t_h*3) > 0)
1097 len -= t_w*t_h*3;
1098 }
1099 len -= 10;
1100 goto out;
1101 }
1102
1103 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e'))
1104 {
1105 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1106 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1107 skip_bits(&s->gb, 16); /* version */
1108 skip_bits(&s->gb, 16); /* flags0 */
1109 skip_bits(&s->gb, 16); /* flags1 */
1110 skip_bits(&s->gb, 8); /* transform */
1111 len -= 7;
1112 goto out;
1113 }
1114
1115 if (id == AV_RL32("LJIF")){
1116 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1117 av_log(s->avctx, AV_LOG_INFO, "Pegasus lossless jpeg header found\n");
1118 skip_bits(&s->gb, 16); /* version ? */
1119 skip_bits(&s->gb, 16); /* unknwon always 0? */
1120 skip_bits(&s->gb, 16); /* unknwon always 0? */
1121 skip_bits(&s->gb, 16); /* unknwon always 0? */
1122 switch( get_bits(&s->gb, 8)){
1123 case 1:
1124 s->rgb= 1;
1125 s->pegasus_rct=0;
1126 break;
1127 case 2:
1128 s->rgb= 1;
1129 s->pegasus_rct=1;
1130 break;
1131 default:
1132 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1133 }
1134 len -= 9;
1135 goto out;
1136 }
1137
1138 /* Apple MJPEG-A */
1139 if ((s->start_code == APP1) && (len > (0x28 - 8)))
1140 {
1141 id = get_bits_long(&s->gb, 32);
1142 id = av_be2ne32(id);
1143 len -= 4;
1144 if (id == AV_RL32("mjpg")) /* Apple MJPEG-A */
1145 {
1146 #if 0
1147 skip_bits(&s->gb, 32); /* field size */
1148 skip_bits(&s->gb, 32); /* pad field size */
1149 skip_bits(&s->gb, 32); /* next off */
1150 skip_bits(&s->gb, 32); /* quant off */
1151 skip_bits(&s->gb, 32); /* huff off */
1152 skip_bits(&s->gb, 32); /* image off */
1153 skip_bits(&s->gb, 32); /* scan off */
1154 skip_bits(&s->gb, 32); /* data off */
1155 #endif
1156 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1157 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1158 }
1159 }
1160
1161 out:
1162 /* slow but needed for extreme adobe jpegs */
1163 if (len < 0)
1164 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error, decode_app parser read over the end\n");
1165 while(--len > 0)
1166 skip_bits(&s->gb, 8);
1167
1168 return 0;
1169 }
1170
1171 static int mjpeg_decode_com(MJpegDecodeContext *s)
1172 {
1173 int len = get_bits(&s->gb, 16);
1174 if (len >= 2 && 8*len - 16 + get_bits_count(&s->gb) <= s->gb.size_in_bits) {
1175 char *cbuf = av_malloc(len - 1);
1176 if (cbuf) {
1177 int i;
1178 for (i = 0; i < len - 2; i++)
1179 cbuf[i] = get_bits(&s->gb, 8);
1180 if (i > 0 && cbuf[i-1] == '\n')
1181 cbuf[i-1] = 0;
1182 else
1183 cbuf[i] = 0;
1184
1185 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1186 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1187
1188 /* buggy avid, it puts EOI only at every 10th frame */
1189 if (!strcmp(cbuf, "AVID"))
1190 {
1191 s->buggy_avid = 1;
1192 // if (s->first_picture)
1193 // printf("mjpeg: workarounding buggy AVID\n");
1194 }
1195 else if(!strcmp(cbuf, "CS=ITU601")){
1196 s->cs_itu601= 1;
1197 }
1198 else if((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
1199 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20))){
1200 s->flipped = 1;
1201 }
1202
1203 av_free(cbuf);
1204 }
1205 }
1206
1207 return 0;
1208 }
1209
1210 #if 0
1211 static int valid_marker_list[] =
1212 {
1213 /* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f */
1214 /* 0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1215 /* 1 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1216 /* 2 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1217 /* 3 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1218 /* 4 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1219 /* 5 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1220 /* 6 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1221 /* 7 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1222 /* 8 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1223 /* 9 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1224 /* a */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1225 /* b */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1226 /* c */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1227 /* d */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1228 /* e */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1229 /* f */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
1230 }
1231 #endif
1232
1233 /* return the 8 bit start code value and update the search
1234 state. Return -1 if no start code found */
1235 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1236 {
1237 const uint8_t *buf_ptr;
1238 unsigned int v, v2;
1239 int val;
1240 #ifdef DEBUG
1241 int skipped=0;
1242 #endif
1243
1244 buf_ptr = *pbuf_ptr;
1245 while (buf_ptr < buf_end) {
1246 v = *buf_ptr++;
1247 v2 = *buf_ptr;
1248 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1249 val = *buf_ptr++;
1250 goto found;
1251 }
1252 #ifdef DEBUG
1253 skipped++;
1254 #endif
1255 }
1256 val = -1;
1257 found:
1258 dprintf(NULL, "find_marker skipped %d bytes\n", skipped);
1259 *pbuf_ptr = buf_ptr;
1260 return val;
1261 }
1262
1263 int ff_mjpeg_decode_frame(AVCodecContext *avctx,
1264 void *data, int *data_size,
1265 AVPacket *avpkt)
1266 {
1267 const uint8_t *buf = avpkt->data;
1268 int buf_size = avpkt->size;
1269 MJpegDecodeContext *s = avctx->priv_data;
1270 const uint8_t *buf_end, *buf_ptr;
1271 int start_code;
1272 AVFrame *picture = data;
1273
1274 s->got_picture = 0; // picture from previous image can not be reused
1275 buf_ptr = buf;
1276 buf_end = buf + buf_size;
1277 while (buf_ptr < buf_end) {
1278 /* find start next marker */
1279 start_code = find_marker(&buf_ptr, buf_end);
1280 {
1281 /* EOF */
1282 if (start_code < 0) {
1283 goto the_end;
1284 } else {
1285 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n", start_code, buf_end - buf_ptr);
1286
1287 if ((buf_end - buf_ptr) > s->buffer_size)
1288 {
1289 av_free(s->buffer);
1290 s->buffer_size = buf_end-buf_ptr;
1291 s->buffer = av_malloc(s->buffer_size + FF_INPUT_BUFFER_PADDING_SIZE);
1292 av_log(avctx, AV_LOG_DEBUG, "buffer too small, expanding to %d bytes\n",
1293 s->buffer_size);
1294 }
1295
1296 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1297 if (start_code == SOS && !s->ls)
1298 {
1299 const uint8_t *src = buf_ptr;
1300 uint8_t *dst = s->buffer;
1301
1302 while (src<buf_end)
1303 {
1304 uint8_t x = *(src++);
1305
1306 *(dst++) = x;
1307 if (avctx->codec_id != CODEC_ID_THP)
1308 {
1309 if (x == 0xff) {
1310 while (src < buf_end && x == 0xff)
1311 x = *(src++);
1312
1313 if (x >= 0xd0 && x <= 0xd7)
1314 *(dst++) = x;
1315 else if (x)
1316 break;
1317 }
1318 }
1319 }
1320 init_get_bits(&s->gb, s->buffer, (dst - s->buffer)*8);
1321
1322 av_log(avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1323 (buf_end - buf_ptr) - (dst - s->buffer));
1324 }
1325 else if(start_code == SOS && s->ls){
1326 const uint8_t *src = buf_ptr;
1327 uint8_t *dst = s->buffer;
1328 int bit_count = 0;
1329 int t = 0, b = 0;
1330 PutBitContext pb;
1331
1332 s->cur_scan++;
1333
1334 /* find marker */
1335 while (src + t < buf_end){
1336 uint8_t x = src[t++];
1337 if (x == 0xff){
1338 while((src + t < buf_end) && x == 0xff)
1339 x = src[t++];
1340 if (x & 0x80) {
1341 t -= 2;
1342 break;
1343 }
1344 }
1345 }
1346 bit_count = t * 8;
1347
1348 init_put_bits(&pb, dst, t);
1349
1350 /* unescape bitstream */
1351 while(b < t){
1352 uint8_t x = src[b++];
1353 put_bits(&pb, 8, x);
1354 if(x == 0xFF){
1355 x = src[b++];
1356 put_bits(&pb, 7, x);
1357 bit_count--;
1358 }
1359 }
1360 flush_put_bits(&pb);
1361
1362 init_get_bits(&s->gb, dst, bit_count);
1363 }
1364 else
1365 init_get_bits(&s->gb, buf_ptr, (buf_end - buf_ptr)*8);
1366
1367 s->start_code = start_code;
1368 if(s->avctx->debug & FF_DEBUG_STARTCODE){
1369 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1370 }
1371
1372 /* process markers */
1373 if (start_code >= 0xd0 && start_code <= 0xd7) {
1374 av_log(avctx, AV_LOG_DEBUG, "restart marker: %d\n", start_code&0x0f);
1375 /* APP fields */
1376 } else if (start_code >= APP0 && start_code <= APP15) {
1377 mjpeg_decode_app(s);
1378 /* Comment */
1379 } else if (start_code == COM){
1380 mjpeg_decode_com(s);
1381 }
1382
1383 switch(start_code) {
1384 case SOI:
1385 s->restart_interval = 0;
1386
1387 s->restart_count = 0;
1388 /* nothing to do on SOI */
1389 break;
1390 case DQT:
1391 ff_mjpeg_decode_dqt(s);
1392 break;
1393 case DHT:
1394 if(ff_mjpeg_decode_dht(s) < 0){
1395 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1396 return -1;
1397 }
1398 break;
1399 case SOF0:
1400 case SOF1:
1401 s->lossless=0;
1402 s->ls=0;
1403 s->progressive=0;
1404 if (ff_mjpeg_decode_sof(s) < 0)
1405 return -1;
1406 break;
1407 case SOF2:
1408 s->lossless=0;
1409 s->ls=0;
1410 s->progressive=1;
1411 if (ff_mjpeg_decode_sof(s) < 0)
1412 return -1;
1413 break;
1414 case SOF3:
1415 s->lossless=1;
1416 s->ls=0;
1417 s->progressive=0;
1418 if (ff_mjpeg_decode_sof(s) < 0)
1419 return -1;
1420 break;
1421 case SOF48:
1422 s->lossless=1;
1423 s->ls=1;
1424 s->progressive=0;
1425 if (ff_mjpeg_decode_sof(s) < 0)
1426 return -1;
1427 break;
1428 case LSE:
1429 if (!CONFIG_JPEGLS_DECODER || ff_jpegls_decode_lse(s) < 0)
1430 return -1;
1431 break;
1432 case EOI:
1433 s->cur_scan = 0;
1434 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1435 break;
1436 eoi_parser:
1437 if (!s->got_picture) {
1438 av_log(avctx, AV_LOG_WARNING, "Found EOI before any SOF, ignoring\n");
1439 break;
1440 }
1441 {
1442 if (s->interlaced) {
1443 s->bottom_field ^= 1;
1444 /* if not bottom field, do not output image yet */
1445 if (s->bottom_field == !s->interlace_polarity)
1446 goto not_the_end;
1447 }
1448 *picture = s->picture;
1449 *data_size = sizeof(AVFrame);
1450
1451 if(!s->lossless){
1452 picture->quality= FFMAX3(s->qscale[0], s->qscale[1], s->qscale[2]);
1453 picture->qstride= 0;
1454 picture->qscale_table= s->qscale_table;
1455 memset(picture->qscale_table, picture->quality, (s->width+15)/16);
1456 if(avctx->debug & FF_DEBUG_QP)
1457 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
1458 picture->quality*= FF_QP2LAMBDA;
1459 }
1460
1461 goto the_end;
1462 }
1463 break;
1464 case SOS:
1465 if (!s->got_picture) {
1466 av_log(avctx, AV_LOG_WARNING, "Can not process SOS before SOF, skipping\n");
1467 break;
1468 }
1469 ff_mjpeg_decode_sos(s);
1470 /* buggy avid puts EOI every 10-20th frame */
1471 /* if restart period is over process EOI */
1472 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1473 goto eoi_parser;
1474 break;
1475 case DRI:
1476 mjpeg_decode_dri(s);
1477 break;
1478 case SOF5:
1479 case SOF6:
1480 case SOF7:
1481 case SOF9:
1482 case SOF10:
1483 case SOF11:
1484 case SOF13:
1485 case SOF14:
1486 case SOF15:
1487 case JPG:
1488 av_log(avctx, AV_LOG_ERROR, "mjpeg: unsupported coding type (%x)\n", start_code);
1489 break;
1490 // default:
1491 // printf("mjpeg: unsupported marker (%x)\n", start_code);
1492 // break;
1493 }
1494
1495 not_the_end:
1496 /* eof process start code */
1497 buf_ptr += (get_bits_count(&s->gb)+7)/8;
1498 av_log(avctx, AV_LOG_DEBUG, "marker parser used %d bytes (%d bits)\n",
1499 (get_bits_count(&s->gb)+7)/8, get_bits_count(&s->gb));
1500 }
1501 }
1502 }
1503 if (s->got_picture) {
1504 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1505 goto eoi_parser;
1506 }
1507 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1508 return -1;
1509 the_end:
1510 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n", buf_end - buf_ptr);
1511 // return buf_end - buf_ptr;
1512 return buf_ptr - buf;
1513 }
1514
1515 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1516 {
1517 MJpegDecodeContext *s = avctx->priv_data;
1518 int i, j;
1519
1520 if (s->picture.data[0])
1521 avctx->release_buffer(avctx, &s->picture);
1522
1523 av_free(s->buffer);
1524 av_free(s->qscale_table);
1525 av_freep(&s->ljpeg_buffer);
1526 s->ljpeg_buffer_size=0;
1527
1528 for(i=0;i<3;i++) {
1529 for(j=0;j<4;j++)
1530 free_vlc(&s->vlcs[i][j]);
1531 }
1532 for(i=0; i<MAX_COMPONENTS; i++) {
1533 av_freep(&s->blocks[i]);
1534 av_freep(&s->last_nnz[i]);
1535 }
1536 return 0;
1537 }
1538
1539 AVCodec ff_mjpeg_decoder = {
1540 "mjpeg",
1541 AVMEDIA_TYPE_VIDEO,
1542 CODEC_ID_MJPEG,
1543 sizeof(MJpegDecodeContext),
1544 ff_mjpeg_decode_init,
1545 NULL,
1546 ff_mjpeg_decode_end,
1547 ff_mjpeg_decode_frame,
1548 CODEC_CAP_DR1,
1549 NULL,
1550 .max_lowres = 4,
1551 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1552 };
1553
1554 AVCodec ff_thp_decoder = {
1555 "thp",
1556 AVMEDIA_TYPE_VIDEO,
1557 CODEC_ID_THP,
1558 sizeof(MJpegDecodeContext),
1559 ff_mjpeg_decode_init,
1560 NULL,
1561 ff_mjpeg_decode_end,
1562 ff_mjpeg_decode_frame,
1563 CODEC_CAP_DR1,
1564 NULL,
1565 .max_lowres = 3,
1566 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
1567 };