fix some printf format specifiers
[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 * This file is part of FFmpeg.
8 *
9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 *
23 * Support for external huffman table, various fixes (AVID workaround),
24 * aspecting, new decode_frame mechanism and apple mjpeg-b support
25 * by Alex Beregszaszi
26 */
27
28 /**
29 * @file mjpegdec.c
30 * MJPEG decoder.
31 */
32
33 //#define DEBUG
34 #include <assert.h>
35
36 #include "avcodec.h"
37 #include "dsputil.h"
38 #include "mjpeg.h"
39 #include "mjpegdec.h"
40 #include "jpeglsdec.h"
41
42
43 static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table,
44 int nb_codes, int use_static, int is_ac)
45 {
46 uint8_t huff_size[256+16];
47 uint16_t huff_code[256+16];
48
49 assert(nb_codes <= 256);
50
51 memset(huff_size, 0, sizeof(huff_size));
52 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
53
54 if(is_ac){
55 memmove(huff_size+16, huff_size, sizeof(uint8_t)*nb_codes);
56 memmove(huff_code+16, huff_code, sizeof(uint16_t)*nb_codes);
57 memset(huff_size, 0, sizeof(uint8_t)*16);
58 memset(huff_code, 0, sizeof(uint16_t)*16);
59 nb_codes += 16;
60 }
61
62 return init_vlc(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 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_luminance, 12, 0, 0);
68 build_vlc(&s->vlcs[0][1], ff_mjpeg_bits_dc_chrominance,
69 ff_mjpeg_val_dc_chrominance, 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 }
75
76 int ff_mjpeg_decode_init(AVCodecContext *avctx)
77 {
78 MJpegDecodeContext *s = avctx->priv_data;
79
80 s->avctx = avctx;
81 dsputil_init(&s->dsp, avctx);
82 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
83 s->buffer_size = 0;
84 s->buffer = NULL;
85 s->start_code = -1;
86 s->first_picture = 1;
87 s->org_height = avctx->coded_height;
88
89 build_basic_mjpeg_vlc(s);
90
91 if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
92 {
93 av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
94 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size*8);
95 if (ff_mjpeg_decode_dht(s)) {
96 av_log(avctx, AV_LOG_ERROR, "mjpeg: error using external huffman table, switching back to internal\n");
97 build_basic_mjpeg_vlc(s);
98 }
99 }
100 if (avctx->extradata_size > 9 &&
101 AV_RL32(avctx->extradata + 4) == MKTAG('f','i','e','l')) {
102 if (avctx->extradata[9] == 6) { /* quicktime icefloe 019 */
103 s->interlace_polarity = 1; /* bottom field first */
104 av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
105 }
106 }
107
108 return 0;
109 }
110
111
112 /* quantize tables */
113 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
114 {
115 int len, index, i, j;
116
117 len = get_bits(&s->gb, 16) - 2;
118
119 while (len >= 65) {
120 /* only 8 bit precision handled */
121 if (get_bits(&s->gb, 4) != 0)
122 {
123 av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
124 return -1;
125 }
126 index = get_bits(&s->gb, 4);
127 if (index >= 4)
128 return -1;
129 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
130 /* read quant table */
131 for(i=0;i<64;i++) {
132 j = s->scantable.permutated[i];
133 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
134 }
135
136 //XXX FIXME finetune, and perhaps add dc too
137 s->qscale[index]= FFMAX(
138 s->quant_matrixes[index][s->scantable.permutated[1]],
139 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
140 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n", index, s->qscale[index]);
141 len -= 65;
142 }
143
144 return 0;
145 }
146
147 /* decode huffman tables and build VLC decoders */
148 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
149 {
150 int len, index, i, class, n, v, code_max;
151 uint8_t bits_table[17];
152 uint8_t val_table[256];
153
154 len = get_bits(&s->gb, 16) - 2;
155
156 while (len > 0) {
157 if (len < 17)
158 return -1;
159 class = get_bits(&s->gb, 4);
160 if (class >= 2)
161 return -1;
162 index = get_bits(&s->gb, 4);
163 if (index >= 4)
164 return -1;
165 n = 0;
166 for(i=1;i<=16;i++) {
167 bits_table[i] = get_bits(&s->gb, 8);
168 n += bits_table[i];
169 }
170 len -= 17;
171 if (len < n || n > 256)
172 return -1;
173
174 code_max = 0;
175 for(i=0;i<n;i++) {
176 v = get_bits(&s->gb, 8);
177 if (v > code_max)
178 code_max = v;
179 val_table[i] = v;
180 }
181 len -= n;
182
183 /* build VLC and flush previous vlc if present */
184 free_vlc(&s->vlcs[class][index]);
185 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
186 class, index, code_max + 1);
187 if(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1, 0, class > 0) < 0){
188 return -1;
189 }
190 }
191 return 0;
192 }
193
194 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
195 {
196 int len, nb_components, i, width, height, pix_fmt_id;
197
198 /* XXX: verify len field validity */
199 len = get_bits(&s->gb, 16);
200 s->bits= get_bits(&s->gb, 8);
201
202 if(s->pegasus_rct) s->bits=9;
203 if(s->bits==9 && !s->pegasus_rct) s->rct=1; //FIXME ugly
204
205 if (s->bits != 8 && !s->lossless){
206 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
207 return -1;
208 }
209
210 height = get_bits(&s->gb, 16);
211 width = get_bits(&s->gb, 16);
212
213 //HACK for odd_height.mov
214 if(s->interlaced && s->width == width && s->height == height + 1)
215 height= s->height;
216
217 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
218 if(avcodec_check_dimensions(s->avctx, width, height))
219 return -1;
220
221 nb_components = get_bits(&s->gb, 8);
222 if (nb_components <= 0 ||
223 nb_components > MAX_COMPONENTS)
224 return -1;
225 if (s->ls && !(s->bits <= 8 || nb_components == 1)){
226 av_log(s->avctx, AV_LOG_ERROR, "only <= 8 bits/component or 16-bit gray accepted for JPEG-LS\n");
227 return -1;
228 }
229 s->nb_components = nb_components;
230 s->h_max = 1;
231 s->v_max = 1;
232 for(i=0;i<nb_components;i++) {
233 /* component id */
234 s->component_id[i] = get_bits(&s->gb, 8) - 1;
235 s->h_count[i] = get_bits(&s->gb, 4);
236 s->v_count[i] = get_bits(&s->gb, 4);
237 /* compute hmax and vmax (only used in interleaved case) */
238 if (s->h_count[i] > s->h_max)
239 s->h_max = s->h_count[i];
240 if (s->v_count[i] > s->v_max)
241 s->v_max = s->v_count[i];
242 s->quant_index[i] = get_bits(&s->gb, 8);
243 if (s->quant_index[i] >= 4)
244 return -1;
245 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n", i, s->h_count[i],
246 s->v_count[i], s->component_id[i], s->quant_index[i]);
247 }
248
249 if(s->ls && (s->h_max > 1 || s->v_max > 1)) {
250 av_log(s->avctx, AV_LOG_ERROR, "Subsampling in JPEG-LS is not supported.\n");
251 return -1;
252 }
253
254 if(s->v_max==1 && s->h_max==1 && s->lossless==1) s->rgb=1;
255
256 /* if different size, realloc/alloc picture */
257 /* XXX: also check h_count and v_count */
258 if (width != s->width || height != s->height) {
259 av_freep(&s->qscale_table);
260
261 s->width = width;
262 s->height = height;
263 s->interlaced = 0;
264
265 /* test interlaced mode */
266 if (s->first_picture &&
267 s->org_height != 0 &&
268 s->height < ((s->org_height * 3) / 4)) {
269 s->interlaced = 1;
270 s->bottom_field = s->interlace_polarity;
271 s->picture.interlaced_frame = 1;
272 s->picture.top_field_first = !s->interlace_polarity;
273 height *= 2;
274 }
275
276 avcodec_set_dimensions(s->avctx, width, height);
277
278 s->qscale_table= av_mallocz((s->width+15)/16);
279
280 s->first_picture = 0;
281 }
282
283 if(s->interlaced && (s->bottom_field == !s->interlace_polarity))
284 return 0;
285
286 /* XXX: not complete test ! */
287 pix_fmt_id = (s->h_count[0] << 20) | (s->v_count[0] << 16) |
288 (s->h_count[1] << 12) | (s->v_count[1] << 8) |
289 (s->h_count[2] << 4) | s->v_count[2];
290 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
291 switch(pix_fmt_id){
292 case 0x222222:
293 case 0x111111:
294 if(s->rgb){
295 s->avctx->pix_fmt = PIX_FMT_RGB32;
296 }else if(s->nb_components==3)
297 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
298 else
299 s->avctx->pix_fmt = PIX_FMT_GRAY8;
300 break;
301 case 0x211111:
302 case 0x221212:
303 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
304 break;
305 default:
306 case 0x221111:
307 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P;
308 break;
309 }
310 if(s->ls){
311 if(s->nb_components > 1)
312 s->avctx->pix_fmt = PIX_FMT_RGB24;
313 else if(s->bits <= 8)
314 s->avctx->pix_fmt = PIX_FMT_GRAY8;
315 else
316 s->avctx->pix_fmt = PIX_FMT_GRAY16;
317 }
318
319 if(s->picture.data[0])
320 s->avctx->release_buffer(s->avctx, &s->picture);
321
322 s->picture.reference= 0;
323 if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
324 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
325 return -1;
326 }
327 s->picture.pict_type= I_TYPE;
328 s->picture.key_frame= 1;
329
330 for(i=0; i<3; i++){
331 s->linesize[i]= s->picture.linesize[i] << s->interlaced;
332 }
333
334 // printf("%d %d %d %d %d %d\n", s->width, s->height, s->linesize[0], s->linesize[1], s->interlaced, s->avctx->height);
335
336 if (len != (8+(3*nb_components)))
337 {
338 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
339 }
340
341 /* totally blank picture as progressive JPEG will only add details to it */
342 if(s->progressive){
343 memset(s->picture.data[0], 0, s->picture.linesize[0] * s->height);
344 memset(s->picture.data[1], 0, s->picture.linesize[1] * s->height >> (s->v_max - s->v_count[1]));
345 memset(s->picture.data[2], 0, s->picture.linesize[2] * s->height >> (s->v_max - s->v_count[2]));
346 }
347 return 0;
348 }
349
350 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
351 {
352 int code;
353 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
354 if (code < 0)
355 {
356 av_log(s->avctx, AV_LOG_WARNING, "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n", 0, dc_index,
357 &s->vlcs[0][dc_index]);
358 return 0xffff;
359 }
360
361 if(code)
362 return get_xbits(&s->gb, code);
363 else
364 return 0;
365 }
366
367 /* decode block and dequantize */
368 static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
369 int component, int dc_index, int ac_index, int16_t *quant_matrix)
370 {
371 int code, i, j, level, val;
372
373 /* DC coef */
374 val = mjpeg_decode_dc(s, dc_index);
375 if (val == 0xffff) {
376 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
377 return -1;
378 }
379 val = val * quant_matrix[0] + s->last_dc[component];
380 s->last_dc[component] = val;
381 block[0] = val;
382 /* AC coefs */
383 i = 0;
384 {OPEN_READER(re, &s->gb)
385 for(;;) {
386 UPDATE_CACHE(re, &s->gb);
387 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
388
389 /* EOB */
390 if (code == 0x10)
391 break;
392 i += ((unsigned)code) >> 4;
393 if(code != 0x100){
394 code &= 0xf;
395 if(code > MIN_CACHE_BITS - 16){
396 UPDATE_CACHE(re, &s->gb)
397 }
398 {
399 int cache=GET_CACHE(re,&s->gb);
400 int sign=(~cache)>>31;
401 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
402 }
403
404 LAST_SKIP_BITS(re, &s->gb, code)
405
406 if (i >= 63) {
407 if(i == 63){
408 j = s->scantable.permutated[63];
409 block[j] = level * quant_matrix[j];
410 break;
411 }
412 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
413 return -1;
414 }
415 j = s->scantable.permutated[i];
416 block[j] = level * quant_matrix[j];
417 }
418 }
419 CLOSE_READER(re, &s->gb)}
420
421 return 0;
422 }
423
424 /* decode block and dequantize - progressive JPEG version */
425 static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block,
426 int component, int dc_index, int ac_index, int16_t *quant_matrix,
427 int ss, int se, int Ah, int Al, int *EOBRUN)
428 {
429 int code, i, j, level, val, run;
430
431 /* DC coef */
432 if(!ss){
433 val = mjpeg_decode_dc(s, dc_index);
434 if (val == 0xffff) {
435 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
436 return -1;
437 }
438 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
439 }else
440 val = 0;
441 s->last_dc[component] = val;
442 block[0] = val;
443 if(!se) return 0;
444 /* AC coefs */
445 if(*EOBRUN){
446 (*EOBRUN)--;
447 return 0;
448 }
449 {OPEN_READER(re, &s->gb)
450 for(i=ss;;i++) {
451 UPDATE_CACHE(re, &s->gb);
452 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
453 /* Progressive JPEG use AC coeffs from zero and this decoder sets offset 16 by default */
454 code -= 16;
455 if(code & 0xF) {
456 i += ((unsigned) code) >> 4;
457 code &= 0xf;
458 if(code > MIN_CACHE_BITS - 16){
459 UPDATE_CACHE(re, &s->gb)
460 }
461 {
462 int cache=GET_CACHE(re,&s->gb);
463 int sign=(~cache)>>31;
464 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
465 }
466
467 LAST_SKIP_BITS(re, &s->gb, code)
468
469 if (i >= se) {
470 if(i == se){
471 j = s->scantable.permutated[se];
472 block[j] = level * quant_matrix[j] << Al;
473 break;
474 }
475 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
476 return -1;
477 }
478 j = s->scantable.permutated[i];
479 block[j] = level * quant_matrix[j] << Al;
480 }else{
481 run = ((unsigned) code) >> 4;
482 if(run == 0xF){// ZRL - skip 15 coefficients
483 i += 15;
484 }else{
485 val = run;
486 run = (1 << run);
487 UPDATE_CACHE(re, &s->gb);
488 run += (GET_CACHE(re, &s->gb) >> (32 - val)) & (run - 1);
489 if(val)
490 LAST_SKIP_BITS(re, &s->gb, val);
491 *EOBRUN = run - 1;
492 break;
493 }
494 }
495 }
496 CLOSE_READER(re, &s->gb)}
497
498 return 0;
499 }
500
501 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){
502 int i, mb_x, mb_y;
503 uint16_t buffer[32768][4];
504 int left[3], top[3], topleft[3];
505 const int linesize= s->linesize[0];
506 const int mask= (1<<s->bits)-1;
507
508 if((unsigned)s->mb_width > 32768) //dynamic alloc
509 return -1;
510
511 for(i=0; i<3; i++){
512 buffer[0][i]= 1 << (s->bits + point_transform - 1);
513 }
514 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
515 const int modified_predictor= mb_y ? predictor : 1;
516 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
517
518 if (s->interlaced && s->bottom_field)
519 ptr += linesize >> 1;
520
521 for(i=0; i<3; i++){
522 top[i]= left[i]= topleft[i]= buffer[0][i];
523 }
524 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
525 if (s->restart_interval && !s->restart_count)
526 s->restart_count = s->restart_interval;
527
528 for(i=0;i<3;i++) {
529 int pred;
530
531 topleft[i]= top[i];
532 top[i]= buffer[mb_x][i];
533
534 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
535
536 left[i]=
537 buffer[mb_x][i]= mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
538 }
539
540 if (s->restart_interval && !--s->restart_count) {
541 align_get_bits(&s->gb);
542 skip_bits(&s->gb, 16); /* skip RSTn */
543 }
544 }
545
546 if(s->rct){
547 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
548 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200)>>2);
549 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
550 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
551 }
552 }else if(s->pegasus_rct){
553 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
554 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2])>>2);
555 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
556 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
557 }
558 }else{
559 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
560 ptr[4*mb_x+0] = buffer[mb_x][0];
561 ptr[4*mb_x+1] = buffer[mb_x][1];
562 ptr[4*mb_x+2] = buffer[mb_x][2];
563 }
564 }
565 }
566 return 0;
567 }
568
569 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point_transform){
570 int i, mb_x, mb_y;
571 const int nb_components=3;
572
573 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
574 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
575 if (s->restart_interval && !s->restart_count)
576 s->restart_count = s->restart_interval;
577
578 if(mb_x==0 || mb_y==0 || s->interlaced){
579 for(i=0;i<nb_components;i++) {
580 uint8_t *ptr;
581 int n, h, v, x, y, c, j, linesize;
582 n = s->nb_blocks[i];
583 c = s->comp_index[i];
584 h = s->h_scount[i];
585 v = s->v_scount[i];
586 x = 0;
587 y = 0;
588 linesize= s->linesize[c];
589
590 for(j=0; j<n; j++) {
591 int pred;
592
593 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
594 if(y==0 && mb_y==0){
595 if(x==0 && mb_x==0){
596 pred= 128 << point_transform;
597 }else{
598 pred= ptr[-1];
599 }
600 }else{
601 if(x==0 && mb_x==0){
602 pred= ptr[-linesize];
603 }else{
604 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
605 }
606 }
607
608 if (s->interlaced && s->bottom_field)
609 ptr += linesize >> 1;
610 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
611
612 if (++x == h) {
613 x = 0;
614 y++;
615 }
616 }
617 }
618 }else{
619 for(i=0;i<nb_components;i++) {
620 uint8_t *ptr;
621 int n, h, v, x, y, c, j, linesize;
622 n = s->nb_blocks[i];
623 c = s->comp_index[i];
624 h = s->h_scount[i];
625 v = s->v_scount[i];
626 x = 0;
627 y = 0;
628 linesize= s->linesize[c];
629
630 for(j=0; j<n; j++) {
631 int pred;
632
633 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
634 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
635 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
636 if (++x == h) {
637 x = 0;
638 y++;
639 }
640 }
641 }
642 }
643 if (s->restart_interval && !--s->restart_count) {
644 align_get_bits(&s->gb);
645 skip_bits(&s->gb, 16); /* skip RSTn */
646 }
647 }
648 }
649 return 0;
650 }
651
652 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int ss, int se, int Ah, int Al){
653 int i, mb_x, mb_y;
654 int EOBRUN = 0;
655
656 if(Ah) return 0; /* TODO decode refinement planes too */
657 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
658 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
659 if (s->restart_interval && !s->restart_count)
660 s->restart_count = s->restart_interval;
661
662 for(i=0;i<nb_components;i++) {
663 uint8_t *ptr;
664 int n, h, v, x, y, c, j;
665 n = s->nb_blocks[i];
666 c = s->comp_index[i];
667 h = s->h_scount[i];
668 v = s->v_scount[i];
669 x = 0;
670 y = 0;
671 for(j=0;j<n;j++) {
672 memset(s->block, 0, sizeof(s->block));
673 if (!s->progressive && decode_block(s, s->block, i,
674 s->dc_index[i], s->ac_index[i],
675 s->quant_matrixes[ s->quant_index[c] ]) < 0) {
676 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
677 return -1;
678 }
679 if (s->progressive && decode_block_progressive(s, s->block, i,
680 s->dc_index[i], s->ac_index[i],
681 s->quant_matrixes[ s->quant_index[c] ], ss, se, Ah, Al, &EOBRUN) < 0) {
682 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
683 return -1;
684 }
685 // av_log(s->avctx, AV_LOG_DEBUG, "mb: %d %d processed\n", mb_y, mb_x);
686 ptr = s->picture.data[c] +
687 (((s->linesize[c] * (v * mb_y + y) * 8) +
688 (h * mb_x + x) * 8) >> s->avctx->lowres);
689 if (s->interlaced && s->bottom_field)
690 ptr += s->linesize[c] >> 1;
691 //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);
692 if(!s->progressive)
693 s->dsp.idct_put(ptr, s->linesize[c], s->block);
694 else
695 s->dsp.idct_add(ptr, s->linesize[c], s->block);
696 if (++x == h) {
697 x = 0;
698 y++;
699 }
700 }
701 }
702 /* (< 1350) buggy workaround for Spectralfan.mov, should be fixed */
703 if (s->restart_interval && (s->restart_interval < 1350) &&
704 !--s->restart_count) {
705 align_get_bits(&s->gb);
706 skip_bits(&s->gb, 16); /* skip RSTn */
707 for (i=0; i<nb_components; i++) /* reset dc */
708 s->last_dc[i] = 1024;
709 }
710 }
711 }
712 return 0;
713 }
714
715 int ff_mjpeg_decode_sos(MJpegDecodeContext *s)
716 {
717 int len, nb_components, i, h, v, predictor, point_transform;
718 int vmax, hmax, index, id;
719 const int block_size= s->lossless ? 1 : 8;
720 int ilv, prev_shift;
721
722 /* XXX: verify len field validity */
723 len = get_bits(&s->gb, 16);
724 nb_components = get_bits(&s->gb, 8);
725 if (len != 6+2*nb_components)
726 {
727 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
728 return -1;
729 }
730 vmax = 0;
731 hmax = 0;
732 for(i=0;i<nb_components;i++) {
733 id = get_bits(&s->gb, 8) - 1;
734 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
735 /* find component index */
736 for(index=0;index<s->nb_components;index++)
737 if (id == s->component_id[index])
738 break;
739 if (index == s->nb_components)
740 {
741 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: index(%d) out of components\n", index);
742 return -1;
743 }
744
745 s->comp_index[i] = index;
746
747 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
748 s->h_scount[i] = s->h_count[index];
749 s->v_scount[i] = s->v_count[index];
750
751 s->dc_index[i] = get_bits(&s->gb, 4);
752 s->ac_index[i] = get_bits(&s->gb, 4);
753
754 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
755 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
756 goto out_of_range;
757 #if 0 //buggy
758 switch(s->start_code)
759 {
760 case SOF0:
761 if (dc_index[i] > 1 || ac_index[i] > 1)
762 goto out_of_range;
763 break;
764 case SOF1:
765 case SOF2:
766 if (dc_index[i] > 3 || ac_index[i] > 3)
767 goto out_of_range;
768 break;
769 case SOF3:
770 if (dc_index[i] > 3 || ac_index[i] != 0)
771 goto out_of_range;
772 break;
773 }
774 #endif
775 }
776
777 predictor= get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
778 ilv= get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
779 prev_shift = get_bits(&s->gb, 4); /* Ah */
780 point_transform= get_bits(&s->gb, 4); /* Al */
781
782 for(i=0;i<nb_components;i++)
783 s->last_dc[i] = 1024;
784
785 if (nb_components > 1) {
786 /* interleaved stream */
787 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
788 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
789 } else if(!s->ls) { /* skip this for JPEG-LS */
790 h = s->h_max / s->h_scount[0];
791 v = s->v_max / s->v_scount[0];
792 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
793 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
794 s->nb_blocks[0] = 1;
795 s->h_scount[0] = 1;
796 s->v_scount[0] = 1;
797 }
798
799 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
800 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n", s->lossless ? "lossless" : "sequencial DCT", s->rgb ? "RGB" : "",
801 predictor, point_transform, ilv, s->bits,
802 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
803
804
805 /* mjpeg-b can have padding bytes between sos and image data, skip them */
806 for (i = s->mjpb_skiptosod; i > 0; i--)
807 skip_bits(&s->gb, 8);
808
809 if(s->lossless){
810 if(ENABLE_JPEGLS_DECODER && s->ls){
811 // for(){
812 // reset_ls_coding_parameters(s, 0);
813
814 ff_jpegls_decode_picture(s, predictor, point_transform, ilv);
815 }else{
816 if(s->rgb){
817 if(ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)
818 return -1;
819 }else{
820 if(ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0)
821 return -1;
822 }
823 }
824 }else{
825 if(mjpeg_decode_scan(s, nb_components, predictor, ilv, prev_shift, point_transform) < 0)
826 return -1;
827 }
828 emms_c();
829 return 0;
830 out_of_range:
831 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
832 return -1;
833 }
834
835 static int mjpeg_decode_dri(MJpegDecodeContext *s)
836 {
837 if (get_bits(&s->gb, 16) != 4)
838 return -1;
839 s->restart_interval = get_bits(&s->gb, 16);
840 s->restart_count = 0;
841 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n", s->restart_interval);
842
843 return 0;
844 }
845
846 static int mjpeg_decode_app(MJpegDecodeContext *s)
847 {
848 int len, id, i;
849
850 len = get_bits(&s->gb, 16);
851 if (len < 5)
852 return -1;
853 if(8*len + get_bits_count(&s->gb) > s->gb.size_in_bits)
854 return -1;
855
856 id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
857 id = be2me_32(id);
858 len -= 6;
859
860 if(s->avctx->debug & FF_DEBUG_STARTCODE){
861 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
862 }
863
864 /* buggy AVID, it puts EOI only at every 10th frame */
865 /* also this fourcc is used by non-avid files too, it holds some
866 informations, but it's always present in AVID creates files */
867 if (id == ff_get_fourcc("AVI1"))
868 {
869 /* structure:
870 4bytes AVI1
871 1bytes polarity
872 1bytes always zero
873 4bytes field_size
874 4bytes field_size_less_padding
875 */
876 s->buggy_avid = 1;
877 // if (s->first_picture)
878 // printf("mjpeg: workarounding buggy AVID\n");
879 i = get_bits(&s->gb, 8);
880 if (i==2) s->bottom_field= 1;
881 else if(i==1) s->bottom_field= 0;
882 #if 0
883 skip_bits(&s->gb, 8);
884 skip_bits(&s->gb, 32);
885 skip_bits(&s->gb, 32);
886 len -= 10;
887 #endif
888 // if (s->interlace_polarity)
889 // printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
890 goto out;
891 }
892
893 // len -= 2;
894
895 if (id == ff_get_fourcc("JFIF"))
896 {
897 int t_w, t_h, v1, v2;
898 skip_bits(&s->gb, 8); /* the trailing zero-byte */
899 v1= get_bits(&s->gb, 8);
900 v2= get_bits(&s->gb, 8);
901 skip_bits(&s->gb, 8);
902
903 s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 16);
904 s->avctx->sample_aspect_ratio.den= get_bits(&s->gb, 16);
905
906 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
907 av_log(s->avctx, AV_LOG_INFO, "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
908 v1, v2,
909 s->avctx->sample_aspect_ratio.num,
910 s->avctx->sample_aspect_ratio.den
911 );
912
913 t_w = get_bits(&s->gb, 8);
914 t_h = get_bits(&s->gb, 8);
915 if (t_w && t_h)
916 {
917 /* skip thumbnail */
918 if (len-10-(t_w*t_h*3) > 0)
919 len -= t_w*t_h*3;
920 }
921 len -= 10;
922 goto out;
923 }
924
925 if (id == ff_get_fourcc("Adob") && (get_bits(&s->gb, 8) == 'e'))
926 {
927 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
928 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
929 skip_bits(&s->gb, 16); /* version */
930 skip_bits(&s->gb, 16); /* flags0 */
931 skip_bits(&s->gb, 16); /* flags1 */
932 skip_bits(&s->gb, 8); /* transform */
933 len -= 7;
934 goto out;
935 }
936
937 if (id == ff_get_fourcc("LJIF")){
938 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
939 av_log(s->avctx, AV_LOG_INFO, "Pegasus lossless jpeg header found\n");
940 skip_bits(&s->gb, 16); /* version ? */
941 skip_bits(&s->gb, 16); /* unknwon always 0? */
942 skip_bits(&s->gb, 16); /* unknwon always 0? */
943 skip_bits(&s->gb, 16); /* unknwon always 0? */
944 switch( get_bits(&s->gb, 8)){
945 case 1:
946 s->rgb= 1;
947 s->pegasus_rct=0;
948 break;
949 case 2:
950 s->rgb= 1;
951 s->pegasus_rct=1;
952 break;
953 default:
954 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
955 }
956 len -= 9;
957 goto out;
958 }
959
960 /* Apple MJPEG-A */
961 if ((s->start_code == APP1) && (len > (0x28 - 8)))
962 {
963 id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
964 id = be2me_32(id);
965 len -= 4;
966 if (id == ff_get_fourcc("mjpg")) /* Apple MJPEG-A */
967 {
968 #if 0
969 skip_bits(&s->gb, 32); /* field size */
970 skip_bits(&s->gb, 32); /* pad field size */
971 skip_bits(&s->gb, 32); /* next off */
972 skip_bits(&s->gb, 32); /* quant off */
973 skip_bits(&s->gb, 32); /* huff off */
974 skip_bits(&s->gb, 32); /* image off */
975 skip_bits(&s->gb, 32); /* scan off */
976 skip_bits(&s->gb, 32); /* data off */
977 #endif
978 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
979 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
980 }
981 }
982
983 out:
984 /* slow but needed for extreme adobe jpegs */
985 if (len < 0)
986 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error, decode_app parser read over the end\n");
987 while(--len > 0)
988 skip_bits(&s->gb, 8);
989
990 return 0;
991 }
992
993 static int mjpeg_decode_com(MJpegDecodeContext *s)
994 {
995 int len = get_bits(&s->gb, 16);
996 if (len >= 2 && 8*len - 16 + get_bits_count(&s->gb) <= s->gb.size_in_bits) {
997 char *cbuf = av_malloc(len - 1);
998 if (cbuf) {
999 int i;
1000 for (i = 0; i < len - 2; i++)
1001 cbuf[i] = get_bits(&s->gb, 8);
1002 if (i > 0 && cbuf[i-1] == '\n')
1003 cbuf[i-1] = 0;
1004 else
1005 cbuf[i] = 0;
1006
1007 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1008 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1009
1010 /* buggy avid, it puts EOI only at every 10th frame */
1011 if (!strcmp(cbuf, "AVID"))
1012 {
1013 s->buggy_avid = 1;
1014 // if (s->first_picture)
1015 // printf("mjpeg: workarounding buggy AVID\n");
1016 }
1017 else if(!strcmp(cbuf, "CS=ITU601")){
1018 s->cs_itu601= 1;
1019 }
1020
1021 av_free(cbuf);
1022 }
1023 }
1024
1025 return 0;
1026 }
1027
1028 #if 0
1029 static int valid_marker_list[] =
1030 {
1031 /* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f */
1032 /* 0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1033 /* 1 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1034 /* 2 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1035 /* 3 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1036 /* 4 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1037 /* 5 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1038 /* 6 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1039 /* 7 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1040 /* 8 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1041 /* 9 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1042 /* a */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1043 /* b */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1044 /* c */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1045 /* d */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1046 /* e */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1047 /* f */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
1048 }
1049 #endif
1050
1051 /* return the 8 bit start code value and update the search
1052 state. Return -1 if no start code found */
1053 static int find_marker(uint8_t **pbuf_ptr, uint8_t *buf_end)
1054 {
1055 uint8_t *buf_ptr;
1056 unsigned int v, v2;
1057 int val;
1058 #ifdef DEBUG
1059 int skipped=0;
1060 #endif
1061
1062 buf_ptr = *pbuf_ptr;
1063 while (buf_ptr < buf_end) {
1064 v = *buf_ptr++;
1065 v2 = *buf_ptr;
1066 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1067 val = *buf_ptr++;
1068 goto found;
1069 }
1070 #ifdef DEBUG
1071 skipped++;
1072 #endif
1073 }
1074 val = -1;
1075 found:
1076 #ifdef DEBUG
1077 av_log(NULL, AV_LOG_VERBOSE, "find_marker skipped %d bytes\n", skipped);
1078 #endif
1079 *pbuf_ptr = buf_ptr;
1080 return val;
1081 }
1082
1083 int ff_mjpeg_decode_frame(AVCodecContext *avctx,
1084 void *data, int *data_size,
1085 uint8_t *buf, int buf_size)
1086 {
1087 MJpegDecodeContext *s = avctx->priv_data;
1088 uint8_t *buf_end, *buf_ptr;
1089 int start_code;
1090 AVFrame *picture = data;
1091
1092 buf_ptr = buf;
1093 buf_end = buf + buf_size;
1094 while (buf_ptr < buf_end) {
1095 /* find start next marker */
1096 start_code = find_marker(&buf_ptr, buf_end);
1097 {
1098 /* EOF */
1099 if (start_code < 0) {
1100 goto the_end;
1101 } else {
1102 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n", start_code, buf_end - buf_ptr);
1103
1104 if ((buf_end - buf_ptr) > s->buffer_size)
1105 {
1106 av_free(s->buffer);
1107 s->buffer_size = buf_end-buf_ptr;
1108 s->buffer = av_malloc(s->buffer_size + FF_INPUT_BUFFER_PADDING_SIZE);
1109 av_log(avctx, AV_LOG_DEBUG, "buffer too small, expanding to %d bytes\n",
1110 s->buffer_size);
1111 }
1112
1113 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1114 if (start_code == SOS && !s->ls)
1115 {
1116 uint8_t *src = buf_ptr;
1117 uint8_t *dst = s->buffer;
1118
1119 while (src<buf_end)
1120 {
1121 uint8_t x = *(src++);
1122
1123 *(dst++) = x;
1124 if (avctx->codec_id != CODEC_ID_THP)
1125 {
1126 if (x == 0xff) {
1127 while (src < buf_end && x == 0xff)
1128 x = *(src++);
1129
1130 if (x >= 0xd0 && x <= 0xd7)
1131 *(dst++) = x;
1132 else if (x)
1133 break;
1134 }
1135 }
1136 }
1137 init_get_bits(&s->gb, s->buffer, (dst - s->buffer)*8);
1138
1139 av_log(avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1140 (buf_end - buf_ptr) - (dst - s->buffer));
1141 }
1142 else if(start_code == SOS && s->ls){
1143 uint8_t *src = buf_ptr;
1144 uint8_t *dst = s->buffer;
1145 int bit_count = 0;
1146 int t = 0, b = 0;
1147 PutBitContext pb;
1148
1149 s->cur_scan++;
1150
1151 /* find marker */
1152 while (src + t < buf_end){
1153 uint8_t x = src[t++];
1154 if (x == 0xff){
1155 while((src + t < buf_end) && x == 0xff)
1156 x = src[t++];
1157 if (x & 0x80) {
1158 t -= 2;
1159 break;
1160 }
1161 }
1162 }
1163 bit_count = t * 8;
1164
1165 init_put_bits(&pb, dst, t);
1166
1167 /* unescape bitstream */
1168 while(b < t){
1169 uint8_t x = src[b++];
1170 put_bits(&pb, 8, x);
1171 if(x == 0xFF){
1172 x = src[b++];
1173 put_bits(&pb, 7, x);
1174 bit_count--;
1175 }
1176 }
1177 flush_put_bits(&pb);
1178
1179 init_get_bits(&s->gb, dst, bit_count);
1180 }
1181 else
1182 init_get_bits(&s->gb, buf_ptr, (buf_end - buf_ptr)*8);
1183
1184 s->start_code = start_code;
1185 if(s->avctx->debug & FF_DEBUG_STARTCODE){
1186 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1187 }
1188
1189 /* process markers */
1190 if (start_code >= 0xd0 && start_code <= 0xd7) {
1191 av_log(avctx, AV_LOG_DEBUG, "restart marker: %d\n", start_code&0x0f);
1192 /* APP fields */
1193 } else if (start_code >= APP0 && start_code <= APP15) {
1194 mjpeg_decode_app(s);
1195 /* Comment */
1196 } else if (start_code == COM){
1197 mjpeg_decode_com(s);
1198 }
1199
1200 switch(start_code) {
1201 case SOI:
1202 s->restart_interval = 0;
1203
1204 s->restart_count = 0;
1205 /* nothing to do on SOI */
1206 break;
1207 case DQT:
1208 ff_mjpeg_decode_dqt(s);
1209 break;
1210 case DHT:
1211 if(ff_mjpeg_decode_dht(s) < 0){
1212 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1213 return -1;
1214 }
1215 break;
1216 case SOF0:
1217 s->lossless=0;
1218 s->ls=0;
1219 s->progressive=0;
1220 if (ff_mjpeg_decode_sof(s) < 0)
1221 return -1;
1222 break;
1223 case SOF2:
1224 s->lossless=0;
1225 s->ls=0;
1226 s->progressive=1;
1227 if (ff_mjpeg_decode_sof(s) < 0)
1228 return -1;
1229 break;
1230 case SOF3:
1231 s->lossless=1;
1232 s->ls=0;
1233 s->progressive=0;
1234 if (ff_mjpeg_decode_sof(s) < 0)
1235 return -1;
1236 break;
1237 case SOF48:
1238 s->lossless=1;
1239 s->ls=1;
1240 s->progressive=0;
1241 if (ff_mjpeg_decode_sof(s) < 0)
1242 return -1;
1243 break;
1244 case LSE:
1245 if (!ENABLE_JPEGLS_DECODER || ff_jpegls_decode_lse(s) < 0)
1246 return -1;
1247 break;
1248 case EOI:
1249 s->cur_scan = 0;
1250 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1251 break;
1252 eoi_parser:
1253 {
1254 if (s->interlaced) {
1255 s->bottom_field ^= 1;
1256 /* if not bottom field, do not output image yet */
1257 if (s->bottom_field == !s->interlace_polarity)
1258 goto not_the_end;
1259 }
1260 *picture = s->picture;
1261 *data_size = sizeof(AVFrame);
1262
1263 if(!s->lossless){
1264 picture->quality= FFMAX(FFMAX(s->qscale[0], s->qscale[1]), s->qscale[2]);
1265 picture->qstride= 0;
1266 picture->qscale_table= s->qscale_table;
1267 memset(picture->qscale_table, picture->quality, (s->width+15)/16);
1268 if(avctx->debug & FF_DEBUG_QP)
1269 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
1270 picture->quality*= FF_QP2LAMBDA;
1271 }
1272
1273 goto the_end;
1274 }
1275 break;
1276 case SOS:
1277 ff_mjpeg_decode_sos(s);
1278 /* buggy avid puts EOI every 10-20th frame */
1279 /* if restart period is over process EOI */
1280 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1281 goto eoi_parser;
1282 break;
1283 case DRI:
1284 mjpeg_decode_dri(s);
1285 break;
1286 case SOF1:
1287 case SOF5:
1288 case SOF6:
1289 case SOF7:
1290 case SOF9:
1291 case SOF10:
1292 case SOF11:
1293 case SOF13:
1294 case SOF14:
1295 case SOF15:
1296 case JPG:
1297 av_log(avctx, AV_LOG_ERROR, "mjpeg: unsupported coding type (%x)\n", start_code);
1298 break;
1299 // default:
1300 // printf("mjpeg: unsupported marker (%x)\n", start_code);
1301 // break;
1302 }
1303
1304 not_the_end:
1305 /* eof process start code */
1306 buf_ptr += (get_bits_count(&s->gb)+7)/8;
1307 av_log(avctx, AV_LOG_DEBUG, "marker parser used %d bytes (%d bits)\n",
1308 (get_bits_count(&s->gb)+7)/8, get_bits_count(&s->gb));
1309 }
1310 }
1311 }
1312 the_end:
1313 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n", buf_end - buf_ptr);
1314 // return buf_end - buf_ptr;
1315 return buf_ptr - buf;
1316 }
1317
1318 int ff_mjpeg_decode_end(AVCodecContext *avctx)
1319 {
1320 MJpegDecodeContext *s = avctx->priv_data;
1321 int i, j;
1322
1323 av_free(s->buffer);
1324 av_free(s->qscale_table);
1325
1326 for(i=0;i<2;i++) {
1327 for(j=0;j<4;j++)
1328 free_vlc(&s->vlcs[i][j]);
1329 }
1330 return 0;
1331 }
1332
1333 AVCodec mjpeg_decoder = {
1334 "mjpeg",
1335 CODEC_TYPE_VIDEO,
1336 CODEC_ID_MJPEG,
1337 sizeof(MJpegDecodeContext),
1338 ff_mjpeg_decode_init,
1339 NULL,
1340 ff_mjpeg_decode_end,
1341 ff_mjpeg_decode_frame,
1342 CODEC_CAP_DR1,
1343 NULL
1344 };
1345
1346 AVCodec thp_decoder = {
1347 "thp",
1348 CODEC_TYPE_VIDEO,
1349 CODEC_ID_THP,
1350 sizeof(MJpegDecodeContext),
1351 ff_mjpeg_decode_init,
1352 NULL,
1353 ff_mjpeg_decode_end,
1354 ff_mjpeg_decode_frame,
1355 CODEC_CAP_DR1,
1356 NULL
1357 };