?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
More OKed parts of the QCELP decoder
[ffmpeg-lucabe.git] / libavcodec / mjpegdec.c
blobe8a34ef2ba94e3060bf7e4cbb901ec1ec67e8409
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 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, 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 }
75
76 av_cold 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] << 28) | (s->v_count[0] << 24) |
288 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
289 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
290 (s->h_count[3] << 4) | s->v_count[3];
291 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
292 if(!(pix_fmt_id & 0x10101010))
293 pix_fmt_id-= (pix_fmt_id & 0xF0F0F0F0)>>1;
294 if(!(pix_fmt_id & 0x01010101))
295 pix_fmt_id-= (pix_fmt_id & 0x0F0F0F0F)>>1;
296
297 switch(pix_fmt_id){
298 case 0x11111100:
299 if(s->rgb){
300 s->avctx->pix_fmt = PIX_FMT_RGB32;
301 }else
302 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
303 assert(s->nb_components==3);
304 break;
305 case 0x11000000:
306 s->avctx->pix_fmt = PIX_FMT_GRAY8;
307 break;
308 case 0x12111100:
309 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV440P : PIX_FMT_YUVJ440P;
310 break;
311 case 0x21111100:
312 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
313 break;
314 case 0x22111100:
315 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P;
316 break;
317 default:
318 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
319 return -1;
320 }
321 if(s->ls){
322 if(s->nb_components > 1)
323 s->avctx->pix_fmt = PIX_FMT_RGB24;
324 else if(s->bits <= 8)
325 s->avctx->pix_fmt = PIX_FMT_GRAY8;
326 else
327 s->avctx->pix_fmt = PIX_FMT_GRAY16;
328 }
329
330 if(s->picture.data[0])
331 s->avctx->release_buffer(s->avctx, &s->picture);
332
333 s->picture.reference= 0;
334 if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
335 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
336 return -1;
337 }
338 s->picture.pict_type= FF_I_TYPE;
339 s->picture.key_frame= 1;
340
341 for(i=0; i<3; i++){
342 s->linesize[i]= s->picture.linesize[i] << s->interlaced;
343 }
344
345 // printf("%d %d %d %d %d %d\n", s->width, s->height, s->linesize[0], s->linesize[1], s->interlaced, s->avctx->height);
346
347 if (len != (8+(3*nb_components)))
348 {
349 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
350 }
351
352 /* totally blank picture as progressive JPEG will only add details to it */
353 if(s->progressive){
354 memset(s->picture.data[0], 0, s->picture.linesize[0] * s->height);
355 memset(s->picture.data[1], 0, s->picture.linesize[1] * s->height >> (s->v_max - s->v_count[1]));
356 memset(s->picture.data[2], 0, s->picture.linesize[2] * s->height >> (s->v_max - s->v_count[2]));
357 }
358 return 0;
359 }
360
361 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
362 {
363 int code;
364 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
365 if (code < 0)
366 {
367 av_log(s->avctx, AV_LOG_WARNING, "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n", 0, dc_index,
368 &s->vlcs[0][dc_index]);
369 return 0xffff;
370 }
371
372 if(code)
373 return get_xbits(&s->gb, code);
374 else
375 return 0;
376 }
377
378 /* decode block and dequantize */
379 static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
380 int component, int dc_index, int ac_index, int16_t *quant_matrix)
381 {
382 int code, i, j, level, val;
383
384 /* DC coef */
385 val = mjpeg_decode_dc(s, dc_index);
386 if (val == 0xffff) {
387 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
388 return -1;
389 }
390 val = val * quant_matrix[0] + s->last_dc[component];
391 s->last_dc[component] = val;
392 block[0] = val;
393 /* AC coefs */
394 i = 0;
395 {OPEN_READER(re, &s->gb)
396 for(;;) {
397 UPDATE_CACHE(re, &s->gb);
398 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
399
400 /* EOB */
401 if (code == 0x10)
402 break;
403 i += ((unsigned)code) >> 4;
404 if(code != 0x100){
405 code &= 0xf;
406 if(code > MIN_CACHE_BITS - 16){
407 UPDATE_CACHE(re, &s->gb)
408 }
409 {
410 int cache=GET_CACHE(re,&s->gb);
411 int sign=(~cache)>>31;
412 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
413 }
414
415 LAST_SKIP_BITS(re, &s->gb, code)
416
417 if (i >= 63) {
418 if(i == 63){
419 j = s->scantable.permutated[63];
420 block[j] = level * quant_matrix[j];
421 break;
422 }
423 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
424 return -1;
425 }
426 j = s->scantable.permutated[i];
427 block[j] = level * quant_matrix[j];
428 }
429 }
430 CLOSE_READER(re, &s->gb)}
431
432 return 0;
433 }
434
435 /* decode block and dequantize - progressive JPEG version */
436 static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block,
437 int component, int dc_index, int ac_index, int16_t *quant_matrix,
438 int ss, int se, int Ah, int Al, int *EOBRUN)
439 {
440 int code, i, j, level, val, run;
441
442 /* DC coef */
443 if(!ss){
444 val = mjpeg_decode_dc(s, dc_index);
445 if (val == 0xffff) {
446 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
447 return -1;
448 }
449 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
450 }else
451 val = 0;
452 s->last_dc[component] = val;
453 block[0] = val;
454 if(!se) return 0;
455 /* AC coefs */
456 if(*EOBRUN){
457 (*EOBRUN)--;
458 return 0;
459 }
460 {OPEN_READER(re, &s->gb)
461 for(i=ss;;i++) {
462 UPDATE_CACHE(re, &s->gb);
463 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
464 /* Progressive JPEG use AC coeffs from zero and this decoder sets offset 16 by default */
465 code -= 16;
466 if(code & 0xF) {
467 i += ((unsigned) code) >> 4;
468 code &= 0xf;
469 if(code > MIN_CACHE_BITS - 16){
470 UPDATE_CACHE(re, &s->gb)
471 }
472 {
473 int cache=GET_CACHE(re,&s->gb);
474 int sign=(~cache)>>31;
475 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
476 }
477
478 LAST_SKIP_BITS(re, &s->gb, code)
479
480 if (i >= se) {
481 if(i == se){
482 j = s->scantable.permutated[se];
483 block[j] = level * quant_matrix[j] << Al;
484 break;
485 }
486 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
487 return -1;
488 }
489 j = s->scantable.permutated[i];
490 block[j] = level * quant_matrix[j] << Al;
491 }else{
492 run = ((unsigned) code) >> 4;
493 if(run == 0xF){// ZRL - skip 15 coefficients
494 i += 15;
495 }else{
496 val = run;
497 run = (1 << run);
498 UPDATE_CACHE(re, &s->gb);
499 run += (GET_CACHE(re, &s->gb) >> (32 - val)) & (run - 1);
500 if(val)
501 LAST_SKIP_BITS(re, &s->gb, val);
502 *EOBRUN = run - 1;
503 break;
504 }
505 }
506 }
507 CLOSE_READER(re, &s->gb)}
508
509 return 0;
510 }
511
512 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){
513 int i, mb_x, mb_y;
514 uint16_t buffer[32768][4];
515 int left[3], top[3], topleft[3];
516 const int linesize= s->linesize[0];
517 const int mask= (1<<s->bits)-1;
518
519 if((unsigned)s->mb_width > 32768) //dynamic alloc
520 return -1;
521
522 for(i=0; i<3; i++){
523 buffer[0][i]= 1 << (s->bits + point_transform - 1);
524 }
525 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
526 const int modified_predictor= mb_y ? predictor : 1;
527 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
528
529 if (s->interlaced && s->bottom_field)
530 ptr += linesize >> 1;
531
532 for(i=0; i<3; i++){
533 top[i]= left[i]= topleft[i]= buffer[0][i];
534 }
535 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
536 if (s->restart_interval && !s->restart_count)
537 s->restart_count = s->restart_interval;
538
539 for(i=0;i<3;i++) {
540 int pred;
541
542 topleft[i]= top[i];
543 top[i]= buffer[mb_x][i];
544
545 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
546
547 left[i]=
548 buffer[mb_x][i]= mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
549 }
550
551 if (s->restart_interval && !--s->restart_count) {
552 align_get_bits(&s->gb);
553 skip_bits(&s->gb, 16); /* skip RSTn */
554 }
555 }
556
557 if(s->rct){
558 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
559 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200)>>2);
560 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
561 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
562 }
563 }else if(s->pegasus_rct){
564 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
565 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2])>>2);
566 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
567 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
568 }
569 }else{
570 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
571 ptr[4*mb_x+0] = buffer[mb_x][0];
572 ptr[4*mb_x+1] = buffer[mb_x][1];
573 ptr[4*mb_x+2] = buffer[mb_x][2];
574 }
575 }
576 }
577 return 0;
578 }
579
580 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point_transform){
581 int i, mb_x, mb_y;
582 const int nb_components=3;
583
584 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
585 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
586 if (s->restart_interval && !s->restart_count)
587 s->restart_count = s->restart_interval;
588
589 if(mb_x==0 || mb_y==0 || s->interlaced){
590 for(i=0;i<nb_components;i++) {
591 uint8_t *ptr;
592 int n, h, v, x, y, c, j, linesize;
593 n = s->nb_blocks[i];
594 c = s->comp_index[i];
595 h = s->h_scount[i];
596 v = s->v_scount[i];
597 x = 0;
598 y = 0;
599 linesize= s->linesize[c];
600
601 for(j=0; j<n; j++) {
602 int pred;
603
604 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
605 if(y==0 && mb_y==0){
606 if(x==0 && mb_x==0){
607 pred= 128 << point_transform;
608 }else{
609 pred= ptr[-1];
610 }
611 }else{
612 if(x==0 && mb_x==0){
613 pred= ptr[-linesize];
614 }else{
615 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
616 }
617 }
618
619 if (s->interlaced && s->bottom_field)
620 ptr += linesize >> 1;
621 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
622
623 if (++x == h) {
624 x = 0;
625 y++;
626 }
627 }
628 }
629 }else{
630 for(i=0;i<nb_components;i++) {
631 uint8_t *ptr;
632 int n, h, v, x, y, c, j, linesize;
633 n = s->nb_blocks[i];
634 c = s->comp_index[i];
635 h = s->h_scount[i];
636 v = s->v_scount[i];
637 x = 0;
638 y = 0;
639 linesize= s->linesize[c];
640
641 for(j=0; j<n; j++) {
642 int pred;
643
644 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
645 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
646 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
647 if (++x == h) {
648 x = 0;
649 y++;
650 }
651 }
652 }
653 }
654 if (s->restart_interval && !--s->restart_count) {
655 align_get_bits(&s->gb);
656 skip_bits(&s->gb, 16); /* skip RSTn */
657 }
658 }
659 }
660 return 0;
661 }
662
663 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int ss, int se, int Ah, int Al){
664 int i, mb_x, mb_y;
665 int EOBRUN = 0;
666 uint8_t* data[MAX_COMPONENTS];
667 int linesize[MAX_COMPONENTS];
668
669 if(Ah) return 0; /* TODO decode refinement planes too */
670
671 for(i=0; i < nb_components; i++) {
672 int c = s->comp_index[i];
673 data[c] = s->picture.data[c];
674 linesize[c]=s->linesize[c];
675 if(s->avctx->codec->id==CODEC_ID_AMV) {
676 //picture should be flipped upside-down for this codec
677 assert(!(s->avctx->flags & CODEC_FLAG_EMU_EDGE));
678 data[c] += (linesize[c] * (s->v_scount[i] * (8 * s->mb_height -((s->height/s->v_max)&7)) - 1 ));
679 linesize[c] *= -1;
680 }
681 }
682
683 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
684 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
685 if (s->restart_interval && !s->restart_count)
686 s->restart_count = s->restart_interval;
687
688 for(i=0;i<nb_components;i++) {
689 uint8_t *ptr;
690 int n, h, v, x, y, c, j;
691 n = s->nb_blocks[i];
692 c = s->comp_index[i];
693 h = s->h_scount[i];
694 v = s->v_scount[i];
695 x = 0;
696 y = 0;
697 for(j=0;j<n;j++) {
698 memset(s->block, 0, sizeof(s->block));
699 if (!s->progressive && decode_block(s, s->block, i,
700 s->dc_index[i], s->ac_index[i],
701 s->quant_matrixes[ s->quant_index[c] ]) < 0) {
702 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
703 return -1;
704 }
705 if (s->progressive && decode_block_progressive(s, s->block, i,
706 s->dc_index[i], s->ac_index[i],
707 s->quant_matrixes[ s->quant_index[c] ], ss, se, Ah, Al, &EOBRUN) < 0) {
708 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
709 return -1;
710 }
711 // av_log(s->avctx, AV_LOG_DEBUG, "mb: %d %d processed\n", mb_y, mb_x);
712 ptr = data[c] +
713 (((linesize[c] * (v * mb_y + y) * 8) +
714 (h * mb_x + x) * 8) >> s->avctx->lowres);
715 if (s->interlaced && s->bottom_field)
716 ptr += linesize[c] >> 1;
717 //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);
718 if(!s->progressive)
719 s->dsp.idct_put(ptr, linesize[c], s->block);
720 else
721 s->dsp.idct_add(ptr, linesize[c], s->block);
722 if (++x == h) {
723 x = 0;
724 y++;
725 }
726 }
727 }
728 /* (< 1350) buggy workaround for Spectralfan.mov, should be fixed */
729 if (s->restart_interval && (s->restart_interval < 1350) &&
730 !--s->restart_count) {
731 align_get_bits(&s->gb);
732 skip_bits(&s->gb, 16); /* skip RSTn */
733 for (i=0; i<nb_components; i++) /* reset dc */
734 s->last_dc[i] = 1024;
735 }
736 }
737 }
738 return 0;
739 }
740
741 int ff_mjpeg_decode_sos(MJpegDecodeContext *s)
742 {
743 int len, nb_components, i, h, v, predictor, point_transform;
744 int vmax, hmax, index, id;
745 const int block_size= s->lossless ? 1 : 8;
746 int ilv, prev_shift;
747
748 /* XXX: verify len field validity */
749 len = get_bits(&s->gb, 16);
750 nb_components = get_bits(&s->gb, 8);
751 if (len != 6+2*nb_components)
752 {
753 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
754 return -1;
755 }
756 vmax = 0;
757 hmax = 0;
758 for(i=0;i<nb_components;i++) {
759 id = get_bits(&s->gb, 8) - 1;
760 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
761 /* find component index */
762 for(index=0;index<s->nb_components;index++)
763 if (id == s->component_id[index])
764 break;
765 if (index == s->nb_components)
766 {
767 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: index(%d) out of components\n", index);
768 return -1;
769 }
770
771 s->comp_index[i] = index;
772
773 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
774 s->h_scount[i] = s->h_count[index];
775 s->v_scount[i] = s->v_count[index];
776
777 s->dc_index[i] = get_bits(&s->gb, 4);
778 s->ac_index[i] = get_bits(&s->gb, 4);
779
780 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
781 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
782 goto out_of_range;
783 #if 0 //buggy
784 switch(s->start_code)
785 {
786 case SOF0:
787 if (dc_index[i] > 1 || ac_index[i] > 1)
788 goto out_of_range;
789 break;
790 case SOF1:
791 case SOF2:
792 if (dc_index[i] > 3 || ac_index[i] > 3)
793 goto out_of_range;
794 break;
795 case SOF3:
796 if (dc_index[i] > 3 || ac_index[i] != 0)
797 goto out_of_range;
798 break;
799 }
800 #endif
801 }
802
803 predictor= get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
804 ilv= get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
805 prev_shift = get_bits(&s->gb, 4); /* Ah */
806 point_transform= get_bits(&s->gb, 4); /* Al */
807
808 for(i=0;i<nb_components;i++)
809 s->last_dc[i] = 1024;
810
811 if (nb_components > 1) {
812 /* interleaved stream */
813 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
814 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
815 } else if(!s->ls) { /* skip this for JPEG-LS */
816 h = s->h_max / s->h_scount[0];
817 v = s->v_max / s->v_scount[0];
818 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
819 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
820 s->nb_blocks[0] = 1;
821 s->h_scount[0] = 1;
822 s->v_scount[0] = 1;
823 }
824
825 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
826 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" : "",
827 predictor, point_transform, ilv, s->bits,
828 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
829
830
831 /* mjpeg-b can have padding bytes between sos and image data, skip them */
832 for (i = s->mjpb_skiptosod; i > 0; i--)
833 skip_bits(&s->gb, 8);
834
835 if(s->lossless){
836 if(ENABLE_JPEGLS_DECODER && s->ls){
837 // for(){
838 // reset_ls_coding_parameters(s, 0);
839
840 if(ff_jpegls_decode_picture(s, predictor, point_transform, ilv) < 0)
841 return -1;
842 }else{
843 if(s->rgb){
844 if(ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)
845 return -1;
846 }else{
847 if(ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0)
848 return -1;
849 }
850 }
851 }else{
852 if(mjpeg_decode_scan(s, nb_components, predictor, ilv, prev_shift, point_transform) < 0)
853 return -1;
854 }
855 emms_c();
856 return 0;
857 out_of_range:
858 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
859 return -1;
860 }
861
862 static int mjpeg_decode_dri(MJpegDecodeContext *s)
863 {
864 if (get_bits(&s->gb, 16) != 4)
865 return -1;
866 s->restart_interval = get_bits(&s->gb, 16);
867 s->restart_count = 0;
868 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n", s->restart_interval);
869
870 return 0;
871 }
872
873 static int mjpeg_decode_app(MJpegDecodeContext *s)
874 {
875 int len, id, i;
876
877 len = get_bits(&s->gb, 16);
878 if (len < 5)
879 return -1;
880 if(8*len + get_bits_count(&s->gb) > s->gb.size_in_bits)
881 return -1;
882
883 id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
884 id = be2me_32(id);
885 len -= 6;
886
887 if(s->avctx->debug & FF_DEBUG_STARTCODE){
888 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
889 }
890
891 /* buggy AVID, it puts EOI only at every 10th frame */
892 /* also this fourcc is used by non-avid files too, it holds some
893 informations, but it's always present in AVID creates files */
894 if (id == ff_get_fourcc("AVI1"))
895 {
896 /* structure:
897 4bytes AVI1
898 1bytes polarity
899 1bytes always zero
900 4bytes field_size
901 4bytes field_size_less_padding
902 */
903 s->buggy_avid = 1;
904 // if (s->first_picture)
905 // printf("mjpeg: workarounding buggy AVID\n");
906 i = get_bits(&s->gb, 8);
907 if (i==2) s->bottom_field= 1;
908 else if(i==1) s->bottom_field= 0;
909 #if 0
910 skip_bits(&s->gb, 8);
911 skip_bits(&s->gb, 32);
912 skip_bits(&s->gb, 32);
913 len -= 10;
914 #endif
915 // if (s->interlace_polarity)
916 // printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
917 goto out;
918 }
919
920 // len -= 2;
921
922 if (id == ff_get_fourcc("JFIF"))
923 {
924 int t_w, t_h, v1, v2;
925 skip_bits(&s->gb, 8); /* the trailing zero-byte */
926 v1= get_bits(&s->gb, 8);
927 v2= get_bits(&s->gb, 8);
928 skip_bits(&s->gb, 8);
929
930 s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 16);
931 s->avctx->sample_aspect_ratio.den= get_bits(&s->gb, 16);
932
933 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
934 av_log(s->avctx, AV_LOG_INFO, "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
935 v1, v2,
936 s->avctx->sample_aspect_ratio.num,
937 s->avctx->sample_aspect_ratio.den
938 );
939
940 t_w = get_bits(&s->gb, 8);
941 t_h = get_bits(&s->gb, 8);
942 if (t_w && t_h)
943 {
944 /* skip thumbnail */
945 if (len-10-(t_w*t_h*3) > 0)
946 len -= t_w*t_h*3;
947 }
948 len -= 10;
949 goto out;
950 }
951
952 if (id == ff_get_fourcc("Adob") && (get_bits(&s->gb, 8) == 'e'))
953 {
954 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
955 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
956 skip_bits(&s->gb, 16); /* version */
957 skip_bits(&s->gb, 16); /* flags0 */
958 skip_bits(&s->gb, 16); /* flags1 */
959 skip_bits(&s->gb, 8); /* transform */
960 len -= 7;
961 goto out;
962 }
963
964 if (id == ff_get_fourcc("LJIF")){
965 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
966 av_log(s->avctx, AV_LOG_INFO, "Pegasus lossless jpeg header found\n");
967 skip_bits(&s->gb, 16); /* version ? */
968 skip_bits(&s->gb, 16); /* unknwon always 0? */
969 skip_bits(&s->gb, 16); /* unknwon always 0? */
970 skip_bits(&s->gb, 16); /* unknwon always 0? */
971 switch( get_bits(&s->gb, 8)){
972 case 1:
973 s->rgb= 1;
974 s->pegasus_rct=0;
975 break;
976 case 2:
977 s->rgb= 1;
978 s->pegasus_rct=1;
979 break;
980 default:
981 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
982 }
983 len -= 9;
984 goto out;
985 }
986
987 /* Apple MJPEG-A */
988 if ((s->start_code == APP1) && (len > (0x28 - 8)))
989 {
990 id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
991 id = be2me_32(id);
992 len -= 4;
993 if (id == ff_get_fourcc("mjpg")) /* Apple MJPEG-A */
994 {
995 #if 0
996 skip_bits(&s->gb, 32); /* field size */
997 skip_bits(&s->gb, 32); /* pad field size */
998 skip_bits(&s->gb, 32); /* next off */
999 skip_bits(&s->gb, 32); /* quant off */
1000 skip_bits(&s->gb, 32); /* huff off */
1001 skip_bits(&s->gb, 32); /* image off */
1002 skip_bits(&s->gb, 32); /* scan off */
1003 skip_bits(&s->gb, 32); /* data off */
1004 #endif
1005 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1006 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1007 }
1008 }
1009
1010 out:
1011 /* slow but needed for extreme adobe jpegs */
1012 if (len < 0)
1013 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error, decode_app parser read over the end\n");
1014 while(--len > 0)
1015 skip_bits(&s->gb, 8);
1016
1017 return 0;
1018 }
1019
1020 static int mjpeg_decode_com(MJpegDecodeContext *s)
1021 {
1022 int len = get_bits(&s->gb, 16);
1023 if (len >= 2 && 8*len - 16 + get_bits_count(&s->gb) <= s->gb.size_in_bits) {
1024 char *cbuf = av_malloc(len - 1);
1025 if (cbuf) {
1026 int i;
1027 for (i = 0; i < len - 2; i++)
1028 cbuf[i] = get_bits(&s->gb, 8);
1029 if (i > 0 && cbuf[i-1] == '\n')
1030 cbuf[i-1] = 0;
1031 else
1032 cbuf[i] = 0;
1033
1034 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1035 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1036
1037 /* buggy avid, it puts EOI only at every 10th frame */
1038 if (!strcmp(cbuf, "AVID"))
1039 {
1040 s->buggy_avid = 1;
1041 // if (s->first_picture)
1042 // printf("mjpeg: workarounding buggy AVID\n");
1043 }
1044 else if(!strcmp(cbuf, "CS=ITU601")){
1045 s->cs_itu601= 1;
1046 }
1047
1048 av_free(cbuf);
1049 }
1050 }
1051
1052 return 0;
1053 }
1054
1055 #if 0
1056 static int valid_marker_list[] =
1057 {
1058 /* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f */
1059 /* 0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1060 /* 1 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1061 /* 2 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1062 /* 3 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1063 /* 4 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1064 /* 5 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1065 /* 6 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1066 /* 7 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1067 /* 8 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1068 /* 9 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1069 /* a */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1070 /* b */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1071 /* c */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1072 /* d */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1073 /* e */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1074 /* f */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
1075 }
1076 #endif
1077
1078 /* return the 8 bit start code value and update the search
1079 state. Return -1 if no start code found */
1080 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1081 {
1082 const uint8_t *buf_ptr;
1083 unsigned int v, v2;
1084 int val;
1085 #ifdef DEBUG
1086 int skipped=0;
1087 #endif
1088
1089 buf_ptr = *pbuf_ptr;
1090 while (buf_ptr < buf_end) {
1091 v = *buf_ptr++;
1092 v2 = *buf_ptr;
1093 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1094 val = *buf_ptr++;
1095 goto found;
1096 }
1097 #ifdef DEBUG
1098 skipped++;
1099 #endif
1100 }
1101 val = -1;
1102 found:
1103 #ifdef DEBUG
1104 av_log(NULL, AV_LOG_VERBOSE, "find_marker skipped %d bytes\n", skipped);
1105 #endif
1106 *pbuf_ptr = buf_ptr;
1107 return val;
1108 }
1109
1110 int ff_mjpeg_decode_frame(AVCodecContext *avctx,
1111 void *data, int *data_size,
1112 const uint8_t *buf, int buf_size)
1113 {
1114 MJpegDecodeContext *s = avctx->priv_data;
1115 const uint8_t *buf_end, *buf_ptr;
1116 int start_code;
1117 AVFrame *picture = data;
1118
1119 buf_ptr = buf;
1120 buf_end = buf + buf_size;
1121 while (buf_ptr < buf_end) {
1122 /* find start next marker */
1123 start_code = find_marker(&buf_ptr, buf_end);
1124 {
1125 /* EOF */
1126 if (start_code < 0) {
1127 goto the_end;
1128 } else {
1129 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n", start_code, buf_end - buf_ptr);
1130
1131 if ((buf_end - buf_ptr) > s->buffer_size)
1132 {
1133 av_free(s->buffer);
1134 s->buffer_size = buf_end-buf_ptr;
1135 s->buffer = av_malloc(s->buffer_size + FF_INPUT_BUFFER_PADDING_SIZE);
1136 av_log(avctx, AV_LOG_DEBUG, "buffer too small, expanding to %d bytes\n",
1137 s->buffer_size);
1138 }
1139
1140 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1141 if (start_code == SOS && !s->ls)
1142 {
1143 const uint8_t *src = buf_ptr;
1144 uint8_t *dst = s->buffer;
1145
1146 while (src<buf_end)
1147 {
1148 uint8_t x = *(src++);
1149
1150 *(dst++) = x;
1151 if (avctx->codec_id != CODEC_ID_THP)
1152 {
1153 if (x == 0xff) {
1154 while (src < buf_end && x == 0xff)
1155 x = *(src++);
1156
1157 if (x >= 0xd0 && x <= 0xd7)
1158 *(dst++) = x;
1159 else if (x)
1160 break;
1161 }
1162 }
1163 }
1164 init_get_bits(&s->gb, s->buffer, (dst - s->buffer)*8);
1165
1166 av_log(avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1167 (buf_end - buf_ptr) - (dst - s->buffer));
1168 }
1169 else if(start_code == SOS && s->ls){
1170 const uint8_t *src = buf_ptr;
1171 uint8_t *dst = s->buffer;
1172 int bit_count = 0;
1173 int t = 0, b = 0;
1174 PutBitContext pb;
1175
1176 s->cur_scan++;
1177
1178 /* find marker */
1179 while (src + t < buf_end){
1180 uint8_t x = src[t++];
1181 if (x == 0xff){
1182 while((src + t < buf_end) && x == 0xff)
1183 x = src[t++];
1184 if (x & 0x80) {
1185 t -= 2;
1186 break;
1187 }
1188 }
1189 }
1190 bit_count = t * 8;
1191
1192 init_put_bits(&pb, dst, t);
1193
1194 /* unescape bitstream */
1195 while(b < t){
1196 uint8_t x = src[b++];
1197 put_bits(&pb, 8, x);
1198 if(x == 0xFF){
1199 x = src[b++];
1200 put_bits(&pb, 7, x);
1201 bit_count--;
1202 }
1203 }
1204 flush_put_bits(&pb);
1205
1206 init_get_bits(&s->gb, dst, bit_count);
1207 }
1208 else
1209 init_get_bits(&s->gb, buf_ptr, (buf_end - buf_ptr)*8);
1210
1211 s->start_code = start_code;
1212 if(s->avctx->debug & FF_DEBUG_STARTCODE){
1213 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1214 }
1215
1216 /* process markers */
1217 if (start_code >= 0xd0 && start_code <= 0xd7) {
1218 av_log(avctx, AV_LOG_DEBUG, "restart marker: %d\n", start_code&0x0f);
1219 /* APP fields */
1220 } else if (start_code >= APP0 && start_code <= APP15) {
1221 mjpeg_decode_app(s);
1222 /* Comment */
1223 } else if (start_code == COM){
1224 mjpeg_decode_com(s);
1225 }
1226
1227 switch(start_code) {
1228 case SOI:
1229 s->restart_interval = 0;
1230
1231 s->restart_count = 0;
1232 /* nothing to do on SOI */
1233 break;
1234 case DQT:
1235 ff_mjpeg_decode_dqt(s);
1236 break;
1237 case DHT:
1238 if(ff_mjpeg_decode_dht(s) < 0){
1239 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1240 return -1;
1241 }
1242 break;
1243 case SOF0:
1244 s->lossless=0;
1245 s->ls=0;
1246 s->progressive=0;
1247 if (ff_mjpeg_decode_sof(s) < 0)
1248 return -1;
1249 break;
1250 case SOF2:
1251 s->lossless=0;
1252 s->ls=0;
1253 s->progressive=1;
1254 if (ff_mjpeg_decode_sof(s) < 0)
1255 return -1;
1256 break;
1257 case SOF3:
1258 s->lossless=1;
1259 s->ls=0;
1260 s->progressive=0;
1261 if (ff_mjpeg_decode_sof(s) < 0)
1262 return -1;
1263 break;
1264 case SOF48:
1265 s->lossless=1;
1266 s->ls=1;
1267 s->progressive=0;
1268 if (ff_mjpeg_decode_sof(s) < 0)
1269 return -1;
1270 break;
1271 case LSE:
1272 if (!ENABLE_JPEGLS_DECODER || ff_jpegls_decode_lse(s) < 0)
1273 return -1;
1274 break;
1275 case EOI:
1276 s->cur_scan = 0;
1277 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1278 break;
1279 eoi_parser:
1280 {
1281 if (s->interlaced) {
1282 s->bottom_field ^= 1;
1283 /* if not bottom field, do not output image yet */
1284 if (s->bottom_field == !s->interlace_polarity)
1285 goto not_the_end;
1286 }
1287 *picture = s->picture;
1288 *data_size = sizeof(AVFrame);
1289
1290 if(!s->lossless){
1291 picture->quality= FFMAX3(s->qscale[0], s->qscale[1], s->qscale[2]);
1292 picture->qstride= 0;
1293 picture->qscale_table= s->qscale_table;
1294 memset(picture->qscale_table, picture->quality, (s->width+15)/16);
1295 if(avctx->debug & FF_DEBUG_QP)
1296 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
1297 picture->quality*= FF_QP2LAMBDA;
1298 }
1299
1300 goto the_end;
1301 }
1302 break;
1303 case SOS:
1304 ff_mjpeg_decode_sos(s);
1305 /* buggy avid puts EOI every 10-20th frame */
1306 /* if restart period is over process EOI */
1307 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1308 goto eoi_parser;
1309 break;
1310 case DRI:
1311 mjpeg_decode_dri(s);
1312 break;
1313 case SOF1:
1314 case SOF5:
1315 case SOF6:
1316 case SOF7:
1317 case SOF9:
1318 case SOF10:
1319 case SOF11:
1320 case SOF13:
1321 case SOF14:
1322 case SOF15:
1323 case JPG:
1324 av_log(avctx, AV_LOG_ERROR, "mjpeg: unsupported coding type (%x)\n", start_code);
1325 break;
1326 // default:
1327 // printf("mjpeg: unsupported marker (%x)\n", start_code);
1328 // break;
1329 }
1330
1331 not_the_end:
1332 /* eof process start code */
1333 buf_ptr += (get_bits_count(&s->gb)+7)/8;
1334 av_log(avctx, AV_LOG_DEBUG, "marker parser used %d bytes (%d bits)\n",
1335 (get_bits_count(&s->gb)+7)/8, get_bits_count(&s->gb));
1336 }
1337 }
1338 }
1339 the_end:
1340 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n", buf_end - buf_ptr);
1341 // return buf_end - buf_ptr;
1342 return buf_ptr - buf;
1343 }
1344
1345 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1346 {
1347 MJpegDecodeContext *s = avctx->priv_data;
1348 int i, j;
1349
1350 av_free(s->buffer);
1351 av_free(s->qscale_table);
1352
1353 for(i=0;i<2;i++) {
1354 for(j=0;j<4;j++)
1355 free_vlc(&s->vlcs[i][j]);
1356 }
1357 return 0;
1358 }
1359
1360 AVCodec mjpeg_decoder = {
1361 "mjpeg",
1362 CODEC_TYPE_VIDEO,
1363 CODEC_ID_MJPEG,
1364 sizeof(MJpegDecodeContext),
1365 ff_mjpeg_decode_init,
1366 NULL,
1367 ff_mjpeg_decode_end,
1368 ff_mjpeg_decode_frame,
1369 CODEC_CAP_DR1,
1370 NULL,
1371 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1372 };
1373
1374 AVCodec thp_decoder = {
1375 "thp",
1376 CODEC_TYPE_VIDEO,
1377 CODEC_ID_THP,
1378 sizeof(MJpegDecodeContext),
1379 ff_mjpeg_decode_init,
1380 NULL,
1381 ff_mjpeg_decode_end,
1382 ff_mjpeg_decode_frame,
1383 CODEC_CAP_DR1,
1384 NULL,
1385 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
1386 };
lucabe's unfinished and experimental patches for ffmpeg