3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2003 Alex Beregszaszi
5 * Copyright (c) 2003-2004 Michael Niedermayer
7 * Support for external huffman table, various fixes (AVID workaround),
8 * aspecting, new decode_frame mechanism and apple mjpeg-b support
11 * This file is part of FFmpeg.
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.
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.
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
29 * @file libavcodec/mjpegdec.c
40 #include "jpeglsdec.h"
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)
46 uint8_t huff_size[256+16];
47 uint16_t huff_code[256+16];
49 assert(nb_codes <= 256);
51 memset(huff_size, 0, sizeof(huff_size));
52 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
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);
62 return init_vlc(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2, use_static);
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);
76 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
78 MJpegDecodeContext *s = avctx->priv_data;
81 dsputil_init(&s->dsp, avctx);
82 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
87 s->org_height = avctx->coded_height;
88 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
90 build_basic_mjpeg_vlc(s);
92 if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
94 av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
95 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size*8);
96 if (ff_mjpeg_decode_dht(s)) {
97 av_log(avctx, AV_LOG_ERROR, "mjpeg: error using external huffman table, switching back to internal\n");
98 build_basic_mjpeg_vlc(s);
101 if (avctx->extradata_size > 9 &&
102 AV_RL32(avctx->extradata + 4) == MKTAG('f','i','e','l')) {
103 if (avctx->extradata[9] == 6) { /* quicktime icefloe 019 */
104 s->interlace_polarity = 1; /* bottom field first */
105 av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
108 if (avctx->codec->id == CODEC_ID_AMV)
115 /* quantize tables */
116 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
118 int len, index, i, j;
120 len = get_bits(&s->gb, 16) - 2;
123 /* only 8 bit precision handled */
124 if (get_bits(&s->gb, 4) != 0)
126 av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
129 index = get_bits(&s->gb, 4);
132 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
133 /* read quant table */
135 j = s->scantable.permutated[i];
136 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
139 //XXX FIXME finetune, and perhaps add dc too
140 s->qscale[index]= FFMAX(
141 s->quant_matrixes[index][s->scantable.permutated[1]],
142 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
143 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n", index, s->qscale[index]);
150 /* decode huffman tables and build VLC decoders */
151 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
153 int len, index, i, class, n, v, code_max;
154 uint8_t bits_table[17];
155 uint8_t val_table[256];
157 len = get_bits(&s->gb, 16) - 2;
162 class = get_bits(&s->gb, 4);
165 index = get_bits(&s->gb, 4);
170 bits_table[i] = get_bits(&s->gb, 8);
174 if (len < n || n > 256)
179 v = get_bits(&s->gb, 8);
186 /* build VLC and flush previous vlc if present */
187 free_vlc(&s->vlcs[class][index]);
188 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
189 class, index, code_max + 1);
190 if(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1, 0, class > 0) < 0){
197 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
199 int len, nb_components, i, width, height, pix_fmt_id;
201 /* XXX: verify len field validity */
202 len = get_bits(&s->gb, 16);
203 s->bits= get_bits(&s->gb, 8);
205 if(s->pegasus_rct) s->bits=9;
206 if(s->bits==9 && !s->pegasus_rct) s->rct=1; //FIXME ugly
208 if (s->bits != 8 && !s->lossless){
209 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
213 height = get_bits(&s->gb, 16);
214 width = get_bits(&s->gb, 16);
216 //HACK for odd_height.mov
217 if(s->interlaced && s->width == width && s->height == height + 1)
220 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
221 if(avcodec_check_dimensions(s->avctx, width, height))
224 nb_components = get_bits(&s->gb, 8);
225 if (nb_components <= 0 ||
226 nb_components > MAX_COMPONENTS)
228 if (s->ls && !(s->bits <= 8 || nb_components == 1)){
229 av_log(s->avctx, AV_LOG_ERROR, "only <= 8 bits/component or 16-bit gray accepted for JPEG-LS\n");
232 s->nb_components = nb_components;
235 for(i=0;i<nb_components;i++) {
237 s->component_id[i] = get_bits(&s->gb, 8) - 1;
238 s->h_count[i] = get_bits(&s->gb, 4);
239 s->v_count[i] = get_bits(&s->gb, 4);
240 /* compute hmax and vmax (only used in interleaved case) */
241 if (s->h_count[i] > s->h_max)
242 s->h_max = s->h_count[i];
243 if (s->v_count[i] > s->v_max)
244 s->v_max = s->v_count[i];
245 s->quant_index[i] = get_bits(&s->gb, 8);
246 if (s->quant_index[i] >= 4)
248 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n", i, s->h_count[i],
249 s->v_count[i], s->component_id[i], s->quant_index[i]);
252 if(s->ls && (s->h_max > 1 || s->v_max > 1)) {
253 av_log(s->avctx, AV_LOG_ERROR, "Subsampling in JPEG-LS is not supported.\n");
257 if(s->v_max==1 && s->h_max==1 && s->lossless==1) s->rgb=1;
259 /* if different size, realloc/alloc picture */
260 /* XXX: also check h_count and v_count */
261 if (width != s->width || height != s->height) {
262 av_freep(&s->qscale_table);
268 /* test interlaced mode */
269 if (s->first_picture &&
270 s->org_height != 0 &&
271 s->height < ((s->org_height * 3) / 4)) {
273 s->bottom_field = s->interlace_polarity;
274 s->picture.interlaced_frame = 1;
275 s->picture.top_field_first = !s->interlace_polarity;
279 avcodec_set_dimensions(s->avctx, width, height);
281 s->qscale_table= av_mallocz((s->width+15)/16);
283 s->first_picture = 0;
286 if(s->interlaced && (s->bottom_field == !s->interlace_polarity))
289 /* XXX: not complete test ! */
290 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
291 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
292 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
293 (s->h_count[3] << 4) | s->v_count[3];
294 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
295 //NOTE we do not allocate pictures large enough for the possible padding of h/v_count being 4
296 if(!(pix_fmt_id & 0xD0D0D0D0))
297 pix_fmt_id-= (pix_fmt_id & 0xF0F0F0F0)>>1;
298 if(!(pix_fmt_id & 0x0D0D0D0D))
299 pix_fmt_id-= (pix_fmt_id & 0x0F0F0F0F)>>1;
304 s->avctx->pix_fmt = PIX_FMT_BGRA;
306 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
307 assert(s->nb_components==3);
310 s->avctx->pix_fmt = PIX_FMT_GRAY8;
313 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV440P : PIX_FMT_YUVJ440P;
316 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
319 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P;
322 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
326 if(s->nb_components > 1)
327 s->avctx->pix_fmt = PIX_FMT_RGB24;
328 else if(s->bits <= 8)
329 s->avctx->pix_fmt = PIX_FMT_GRAY8;
331 s->avctx->pix_fmt = PIX_FMT_GRAY16;
334 if(s->picture.data[0])
335 s->avctx->release_buffer(s->avctx, &s->picture);
337 s->picture.reference= 0;
338 if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
339 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
342 s->picture.pict_type= FF_I_TYPE;
343 s->picture.key_frame= 1;
347 s->linesize[i]= s->picture.linesize[i] << s->interlaced;
350 // printf("%d %d %d %d %d %d\n", s->width, s->height, s->linesize[0], s->linesize[1], s->interlaced, s->avctx->height);
352 if (len != (8+(3*nb_components)))
354 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
357 /* totally blank picture as progressive JPEG will only add details to it */
359 int bw = (width + s->h_max*8-1) / (s->h_max*8);
360 int bh = (height + s->v_max*8-1) / (s->v_max*8);
361 for(i=0; i<s->nb_components; i++) {
362 int size = bw * bh * s->h_count[i] * s->v_count[i];
363 av_freep(&s->blocks[i]);
364 av_freep(&s->last_nnz[i]);
365 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
366 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
367 s->block_stride[i] = bw * s->h_count[i];
369 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
374 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
377 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
380 av_log(s->avctx, AV_LOG_WARNING, "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n", 0, dc_index,
381 &s->vlcs[0][dc_index]);
386 return get_xbits(&s->gb, code);
391 /* decode block and dequantize */
392 static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
393 int component, int dc_index, int ac_index, int16_t *quant_matrix)
395 int code, i, j, level, val;
398 val = mjpeg_decode_dc(s, dc_index);
400 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
403 val = val * quant_matrix[0] + s->last_dc[component];
404 s->last_dc[component] = val;
408 {OPEN_READER(re, &s->gb)
410 UPDATE_CACHE(re, &s->gb);
411 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
416 i += ((unsigned)code) >> 4;
419 if(code > MIN_CACHE_BITS - 16){
420 UPDATE_CACHE(re, &s->gb)
423 int cache=GET_CACHE(re,&s->gb);
424 int sign=(~cache)>>31;
425 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
428 LAST_SKIP_BITS(re, &s->gb, code)
432 j = s->scantable.permutated[63];
433 block[j] = level * quant_matrix[j];
436 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
439 j = s->scantable.permutated[i];
440 block[j] = level * quant_matrix[j];
443 CLOSE_READER(re, &s->gb)}
448 static int decode_dc_progressive(MJpegDecodeContext *s, DCTELEM *block, int component,
449 int dc_index, int16_t *quant_matrix, int Al)
452 s->dsp.clear_block(block);
453 val = mjpeg_decode_dc(s, dc_index);
455 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
458 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
459 s->last_dc[component] = val;
464 /* decode block and dequantize - progressive JPEG version */
465 static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz,
466 int ac_index, int16_t *quant_matrix,
467 int ss, int se, int Al, int *EOBRUN)
469 int code, i, j, level, val, run;
475 {OPEN_READER(re, &s->gb)
477 UPDATE_CACHE(re, &s->gb);
478 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
479 /* Progressive JPEG use AC coeffs from zero and this decoder sets offset 16 by default */
482 i += ((unsigned) code) >> 4;
484 if(code > MIN_CACHE_BITS - 16){
485 UPDATE_CACHE(re, &s->gb)
488 int cache=GET_CACHE(re,&s->gb);
489 int sign=(~cache)>>31;
490 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
493 LAST_SKIP_BITS(re, &s->gb, code)
497 j = s->scantable.permutated[se];
498 block[j] = level * quant_matrix[j] << Al;
501 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
504 j = s->scantable.permutated[i];
505 block[j] = level * quant_matrix[j] << Al;
507 run = ((unsigned) code) >> 4;
508 if(run == 0xF){// ZRL - skip 15 coefficients
513 UPDATE_CACHE(re, &s->gb);
514 run += (GET_CACHE(re, &s->gb) >> (32 - val)) & (run - 1);
516 LAST_SKIP_BITS(re, &s->gb, val);
522 CLOSE_READER(re, &s->gb)}
528 #define REFINE_BIT(j) {\
529 UPDATE_CACHE(re, &s->gb);\
530 sign = block[j]>>15;\
531 block[j] += SHOW_UBITS(re, &s->gb, 1) * ((quant_matrix[j]^sign)-sign) << Al;\
532 LAST_SKIP_BITS(re, &s->gb, 1);\
540 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);\
545 j = s->scantable.permutated[i];\
552 /* decode block and dequantize - progressive JPEG refinement pass */
553 static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz,
554 int ac_index, int16_t *quant_matrix,
555 int ss, int se, int Al, int *EOBRUN)
557 int code, i=ss, j, sign, val, run;
558 int last = FFMIN(se, *last_nnz);
560 OPEN_READER(re, &s->gb);
565 UPDATE_CACHE(re, &s->gb);
566 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
567 /* Progressive JPEG use AC coeffs from zero and this decoder sets offset 16 by default */
570 run = ((unsigned) code) >> 4;
571 UPDATE_CACHE(re, &s->gb);
572 val = SHOW_UBITS(re, &s->gb, 1);
573 LAST_SKIP_BITS(re, &s->gb, 1);
575 j = s->scantable.permutated[i];
577 block[j] = ((quant_matrix[j]^val)-val) << Al;
581 CLOSE_READER(re, &s->gb)
585 run = ((unsigned) code) >> 4;
592 UPDATE_CACHE(re, &s->gb);
593 run += SHOW_UBITS(re, &s->gb, val);
594 LAST_SKIP_BITS(re, &s->gb, val);
607 j = s->scantable.permutated[i];
611 CLOSE_READER(re, &s->gb);
618 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){
620 uint16_t (*buffer)[4];
621 int left[3], top[3], topleft[3];
622 const int linesize= s->linesize[0];
623 const int mask= (1<<s->bits)-1;
625 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size, (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
626 buffer= s->ljpeg_buffer;
629 buffer[0][i]= 1 << (s->bits + point_transform - 1);
631 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
632 const int modified_predictor= mb_y ? predictor : 1;
633 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
635 if (s->interlaced && s->bottom_field)
636 ptr += linesize >> 1;
639 top[i]= left[i]= topleft[i]= buffer[0][i];
641 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
642 if (s->restart_interval && !s->restart_count)
643 s->restart_count = s->restart_interval;
649 top[i]= buffer[mb_x][i];
651 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
654 buffer[mb_x][i]= mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
657 if (s->restart_interval && !--s->restart_count) {
658 align_get_bits(&s->gb);
659 skip_bits(&s->gb, 16); /* skip RSTn */
664 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
665 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200)>>2);
666 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
667 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
669 }else if(s->pegasus_rct){
670 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
671 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2])>>2);
672 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
673 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
676 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
677 ptr[4*mb_x+0] = buffer[mb_x][2];
678 ptr[4*mb_x+1] = buffer[mb_x][1];
679 ptr[4*mb_x+2] = buffer[mb_x][0];
686 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point_transform){
688 const int nb_components=3;
690 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
691 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
692 if (s->restart_interval && !s->restart_count)
693 s->restart_count = s->restart_interval;
695 if(mb_x==0 || mb_y==0 || s->interlaced){
696 for(i=0;i<nb_components;i++) {
698 int n, h, v, x, y, c, j, linesize;
700 c = s->comp_index[i];
705 linesize= s->linesize[c];
710 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
713 pred= 128 << point_transform;
719 pred= ptr[-linesize];
721 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
725 if (s->interlaced && s->bottom_field)
726 ptr += linesize >> 1;
727 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
736 for(i=0;i<nb_components;i++) {
738 int n, h, v, x, y, c, j, linesize;
740 c = s->comp_index[i];
745 linesize= s->linesize[c];
750 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
751 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
752 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
760 if (s->restart_interval && !--s->restart_count) {
761 align_get_bits(&s->gb);
762 skip_bits(&s->gb, 16); /* skip RSTn */
769 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah, int Al){
771 uint8_t* data[MAX_COMPONENTS];
772 int linesize[MAX_COMPONENTS];
774 if(s->flipped && s->avctx->flags & CODEC_FLAG_EMU_EDGE) {
775 av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with CODEC_FLAG_EMU_EDGE set!\n");
778 for(i=0; i < nb_components; i++) {
779 int c = s->comp_index[i];
780 data[c] = s->picture.data[c];
781 linesize[c]=s->linesize[c];
782 s->coefs_finished[c] |= 1;
784 //picture should be flipped upside-down for this codec
785 data[c] += (linesize[c] * (s->v_scount[i] * (8 * s->mb_height -((s->height/s->v_max)&7)) - 1 ));
790 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
791 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
792 if (s->restart_interval && !s->restart_count)
793 s->restart_count = s->restart_interval;
795 for(i=0;i<nb_components;i++) {
797 int n, h, v, x, y, c, j;
799 c = s->comp_index[i];
806 (((linesize[c] * (v * mb_y + y) * 8) +
807 (h * mb_x + x) * 8) >> s->avctx->lowres);
808 if(s->interlaced && s->bottom_field)
809 ptr += linesize[c] >> 1;
810 if(!s->progressive) {
811 s->dsp.clear_block(s->block);
812 if(decode_block(s, s->block, i,
813 s->dc_index[i], s->ac_index[i],
814 s->quant_matrixes[ s->quant_index[c] ]) < 0) {
815 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
818 s->dsp.idct_put(ptr, linesize[c], s->block);
820 int block_idx = s->block_stride[c] * (v * mb_y + y) + (h * mb_x + x);
821 DCTELEM *block = s->blocks[c][block_idx];
823 block[0] += get_bits1(&s->gb) * s->quant_matrixes[ s->quant_index[c] ][0] << Al;
824 else if(decode_dc_progressive(s, block, i, s->dc_index[i], s->quant_matrixes[ s->quant_index[c] ], Al) < 0) {
825 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
829 // av_log(s->avctx, AV_LOG_DEBUG, "mb: %d %d processed\n", mb_y, mb_x);
830 //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);
838 if (s->restart_interval && !--s->restart_count) {
839 align_get_bits(&s->gb);
840 skip_bits(&s->gb, 16); /* skip RSTn */
841 for (i=0; i<nb_components; i++) /* reset dc */
842 s->last_dc[i] = 1024;
849 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss, int se, int Ah, int Al){
852 int c = s->comp_index[0];
853 uint8_t* data = s->picture.data[c];
854 int linesize = s->linesize[c];
856 int16_t *quant_matrix = s->quant_matrixes[ s->quant_index[c] ];
859 s->coefs_finished[c] |= (1LL<<(se+1))-(1LL<<ss);
860 last_scan = !~s->coefs_finished[c];
863 if(s->interlaced && s->bottom_field)
864 data += linesize >> 1;
866 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
867 uint8_t *ptr = data + (mb_y*linesize*8 >> s->avctx->lowres);
868 int block_idx = mb_y * s->block_stride[c];
869 DCTELEM (*block)[64] = &s->blocks[c][block_idx];
870 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
871 for(mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
874 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
875 quant_matrix, ss, se, Al, &EOBRUN);
877 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
878 quant_matrix, ss, se, Al, &EOBRUN);
880 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
884 s->dsp.idct_put(ptr, linesize, *block);
885 ptr += 8 >> s->avctx->lowres;
892 int ff_mjpeg_decode_sos(MJpegDecodeContext *s)
894 int len, nb_components, i, h, v, predictor, point_transform;
896 const int block_size= s->lossless ? 1 : 8;
899 /* XXX: verify len field validity */
900 len = get_bits(&s->gb, 16);
901 nb_components = get_bits(&s->gb, 8);
902 if (nb_components == 0 || nb_components > MAX_COMPONENTS){
903 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: nb_components (%d) unsupported\n", nb_components);
906 if (len != 6+2*nb_components)
908 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
911 for(i=0;i<nb_components;i++) {
912 id = get_bits(&s->gb, 8) - 1;
913 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
914 /* find component index */
915 for(index=0;index<s->nb_components;index++)
916 if (id == s->component_id[index])
918 if (index == s->nb_components)
920 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: index(%d) out of components\n", index);
923 /* Metasoft MJPEG codec has Cb and Cr swapped */
924 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
925 && nb_components == 3 && s->nb_components == 3 && i)
928 s->comp_index[i] = index;
930 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
931 s->h_scount[i] = s->h_count[index];
932 s->v_scount[i] = s->v_count[index];
934 s->dc_index[i] = get_bits(&s->gb, 4);
935 s->ac_index[i] = get_bits(&s->gb, 4);
937 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
938 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
940 if (!s->vlcs[0][s->dc_index[i]].table || !s->vlcs[1][s->ac_index[i]].table)
944 predictor= get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
945 ilv= get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
946 prev_shift = get_bits(&s->gb, 4); /* Ah */
947 point_transform= get_bits(&s->gb, 4); /* Al */
949 for(i=0;i<nb_components;i++)
950 s->last_dc[i] = 1024;
952 if (nb_components > 1) {
953 /* interleaved stream */
954 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
955 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
956 } else if(!s->ls) { /* skip this for JPEG-LS */
957 h = s->h_max / s->h_scount[0];
958 v = s->v_max / s->v_scount[0];
959 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
960 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
966 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
967 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" : "",
968 predictor, point_transform, ilv, s->bits,
969 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
972 /* mjpeg-b can have padding bytes between sos and image data, skip them */
973 for (i = s->mjpb_skiptosod; i > 0; i--)
974 skip_bits(&s->gb, 8);
977 if(CONFIG_JPEGLS_DECODER && s->ls){
979 // reset_ls_coding_parameters(s, 0);
981 if(ff_jpegls_decode_picture(s, predictor, point_transform, ilv) < 0)
985 if(ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)
988 if(ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0)
993 if(s->progressive && predictor) {
994 if(mjpeg_decode_scan_progressive_ac(s, predictor, ilv, prev_shift, point_transform) < 0)
997 if(mjpeg_decode_scan(s, nb_components, prev_shift, point_transform) < 0)
1004 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1008 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1010 if (get_bits(&s->gb, 16) != 4)
1012 s->restart_interval = get_bits(&s->gb, 16);
1013 s->restart_count = 0;
1014 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n", s->restart_interval);
1019 static int mjpeg_decode_app(MJpegDecodeContext *s)
1023 len = get_bits(&s->gb, 16);
1026 if(8*len + get_bits_count(&s->gb) > s->gb.size_in_bits)
1029 id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
1033 if(s->avctx->debug & FF_DEBUG_STARTCODE){
1034 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1037 /* buggy AVID, it puts EOI only at every 10th frame */
1038 /* also this fourcc is used by non-avid files too, it holds some
1039 informations, but it's always present in AVID creates files */
1040 if (id == AV_RL32("AVI1"))
1047 4bytes field_size_less_padding
1050 // if (s->first_picture)
1051 // printf("mjpeg: workarounding buggy AVID\n");
1052 i = get_bits(&s->gb, 8);
1053 if (i==2) s->bottom_field= 1;
1054 else if(i==1) s->bottom_field= 0;
1056 skip_bits(&s->gb, 8);
1057 skip_bits(&s->gb, 32);
1058 skip_bits(&s->gb, 32);
1061 // if (s->interlace_polarity)
1062 // printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
1068 if (id == AV_RL32("JFIF"))
1070 int t_w, t_h, v1, v2;
1071 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1072 v1= get_bits(&s->gb, 8);
1073 v2= get_bits(&s->gb, 8);
1074 skip_bits(&s->gb, 8);
1076 s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 16);
1077 s->avctx->sample_aspect_ratio.den= get_bits(&s->gb, 16);
1079 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1080 av_log(s->avctx, AV_LOG_INFO, "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1082 s->avctx->sample_aspect_ratio.num,
1083 s->avctx->sample_aspect_ratio.den
1086 t_w = get_bits(&s->gb, 8);
1087 t_h = get_bits(&s->gb, 8);
1090 /* skip thumbnail */
1091 if (len-10-(t_w*t_h*3) > 0)
1098 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e'))
1100 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1101 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1102 skip_bits(&s->gb, 16); /* version */
1103 skip_bits(&s->gb, 16); /* flags0 */
1104 skip_bits(&s->gb, 16); /* flags1 */
1105 skip_bits(&s->gb, 8); /* transform */
1110 if (id == AV_RL32("LJIF")){
1111 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1112 av_log(s->avctx, AV_LOG_INFO, "Pegasus lossless jpeg header found\n");
1113 skip_bits(&s->gb, 16); /* version ? */
1114 skip_bits(&s->gb, 16); /* unknwon always 0? */
1115 skip_bits(&s->gb, 16); /* unknwon always 0? */
1116 skip_bits(&s->gb, 16); /* unknwon always 0? */
1117 switch( get_bits(&s->gb, 8)){
1127 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1134 if ((s->start_code == APP1) && (len > (0x28 - 8)))
1136 id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
1139 if (id == AV_RL32("mjpg")) /* Apple MJPEG-A */
1142 skip_bits(&s->gb, 32); /* field size */
1143 skip_bits(&s->gb, 32); /* pad field size */
1144 skip_bits(&s->gb, 32); /* next off */
1145 skip_bits(&s->gb, 32); /* quant off */
1146 skip_bits(&s->gb, 32); /* huff off */
1147 skip_bits(&s->gb, 32); /* image off */
1148 skip_bits(&s->gb, 32); /* scan off */
1149 skip_bits(&s->gb, 32); /* data off */
1151 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1152 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1157 /* slow but needed for extreme adobe jpegs */
1159 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error, decode_app parser read over the end\n");
1161 skip_bits(&s->gb, 8);
1166 static int mjpeg_decode_com(MJpegDecodeContext *s)
1168 int len = get_bits(&s->gb, 16);
1169 if (len >= 2 && 8*len - 16 + get_bits_count(&s->gb) <= s->gb.size_in_bits) {
1170 char *cbuf = av_malloc(len - 1);
1173 for (i = 0; i < len - 2; i++)
1174 cbuf[i] = get_bits(&s->gb, 8);
1175 if (i > 0 && cbuf[i-1] == '\n')
1180 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1181 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1183 /* buggy avid, it puts EOI only at every 10th frame */
1184 if (!strcmp(cbuf, "AVID"))
1187 // if (s->first_picture)
1188 // printf("mjpeg: workarounding buggy AVID\n");
1190 else if(!strcmp(cbuf, "CS=ITU601")){
1193 else if((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
1194 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20))){
1206 static int valid_marker_list[] =
1208 /* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f */
1209 /* 0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1210 /* 1 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1211 /* 2 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1212 /* 3 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1213 /* 4 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1214 /* 5 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1215 /* 6 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1216 /* 7 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1217 /* 8 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1218 /* 9 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1219 /* a */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1220 /* b */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1221 /* c */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1222 /* d */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1223 /* e */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1224 /* f */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
1228 /* return the 8 bit start code value and update the search
1229 state. Return -1 if no start code found */
1230 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1232 const uint8_t *buf_ptr;
1239 buf_ptr = *pbuf_ptr;
1240 while (buf_ptr < buf_end) {
1243 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1253 dprintf(NULL, "find_marker skipped %d bytes\n", skipped);
1254 *pbuf_ptr = buf_ptr;
1258 int ff_mjpeg_decode_frame(AVCodecContext *avctx,
1259 void *data, int *data_size,
1262 const uint8_t *buf = avpkt->data;
1263 int buf_size = avpkt->size;
1264 MJpegDecodeContext *s = avctx->priv_data;
1265 const uint8_t *buf_end, *buf_ptr;
1267 AVFrame *picture = data;
1269 s->got_picture = 0; // picture from previous image can not be reused
1271 buf_end = buf + buf_size;
1272 while (buf_ptr < buf_end) {
1273 /* find start next marker */
1274 start_code = find_marker(&buf_ptr, buf_end);
1277 if (start_code < 0) {
1280 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n", start_code, buf_end - buf_ptr);
1282 if ((buf_end - buf_ptr) > s->buffer_size)
1285 s->buffer_size = buf_end-buf_ptr;
1286 s->buffer = av_malloc(s->buffer_size + FF_INPUT_BUFFER_PADDING_SIZE);
1287 av_log(avctx, AV_LOG_DEBUG, "buffer too small, expanding to %d bytes\n",
1291 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1292 if (start_code == SOS && !s->ls)
1294 const uint8_t *src = buf_ptr;
1295 uint8_t *dst = s->buffer;
1299 uint8_t x = *(src++);
1302 if (avctx->codec_id != CODEC_ID_THP)
1305 while (src < buf_end && x == 0xff)
1308 if (x >= 0xd0 && x <= 0xd7)
1315 init_get_bits(&s->gb, s->buffer, (dst - s->buffer)*8);
1317 av_log(avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1318 (buf_end - buf_ptr) - (dst - s->buffer));
1320 else if(start_code == SOS && s->ls){
1321 const uint8_t *src = buf_ptr;
1322 uint8_t *dst = s->buffer;
1330 while (src + t < buf_end){
1331 uint8_t x = src[t++];
1333 while((src + t < buf_end) && x == 0xff)
1343 init_put_bits(&pb, dst, t);
1345 /* unescape bitstream */
1347 uint8_t x = src[b++];
1348 put_bits(&pb, 8, x);
1351 put_bits(&pb, 7, x);
1355 flush_put_bits(&pb);
1357 init_get_bits(&s->gb, dst, bit_count);
1360 init_get_bits(&s->gb, buf_ptr, (buf_end - buf_ptr)*8);
1362 s->start_code = start_code;
1363 if(s->avctx->debug & FF_DEBUG_STARTCODE){
1364 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1367 /* process markers */
1368 if (start_code >= 0xd0 && start_code <= 0xd7) {
1369 av_log(avctx, AV_LOG_DEBUG, "restart marker: %d\n", start_code&0x0f);
1371 } else if (start_code >= APP0 && start_code <= APP15) {
1372 mjpeg_decode_app(s);
1374 } else if (start_code == COM){
1375 mjpeg_decode_com(s);
1378 switch(start_code) {
1380 s->restart_interval = 0;
1382 s->restart_count = 0;
1383 /* nothing to do on SOI */
1386 ff_mjpeg_decode_dqt(s);
1389 if(ff_mjpeg_decode_dht(s) < 0){
1390 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1399 if (ff_mjpeg_decode_sof(s) < 0)
1406 if (ff_mjpeg_decode_sof(s) < 0)
1413 if (ff_mjpeg_decode_sof(s) < 0)
1420 if (ff_mjpeg_decode_sof(s) < 0)
1424 if (!CONFIG_JPEGLS_DECODER || ff_jpegls_decode_lse(s) < 0)
1429 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1432 if (!s->got_picture) {
1433 av_log(avctx, AV_LOG_WARNING, "Found EOI before any SOF, ignoring\n");
1437 if (s->interlaced) {
1438 s->bottom_field ^= 1;
1439 /* if not bottom field, do not output image yet */
1440 if (s->bottom_field == !s->interlace_polarity)
1443 *picture = s->picture;
1444 *data_size = sizeof(AVFrame);
1447 picture->quality= FFMAX3(s->qscale[0], s->qscale[1], s->qscale[2]);
1448 picture->qstride= 0;
1449 picture->qscale_table= s->qscale_table;
1450 memset(picture->qscale_table, picture->quality, (s->width+15)/16);
1451 if(avctx->debug & FF_DEBUG_QP)
1452 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
1453 picture->quality*= FF_QP2LAMBDA;
1460 if (!s->got_picture) {
1461 av_log(avctx, AV_LOG_WARNING, "Can not process SOS before SOF, skipping\n");
1464 ff_mjpeg_decode_sos(s);
1465 /* buggy avid puts EOI every 10-20th frame */
1466 /* if restart period is over process EOI */
1467 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1471 mjpeg_decode_dri(s);
1483 av_log(avctx, AV_LOG_ERROR, "mjpeg: unsupported coding type (%x)\n", start_code);
1486 // printf("mjpeg: unsupported marker (%x)\n", start_code);
1491 /* eof process start code */
1492 buf_ptr += (get_bits_count(&s->gb)+7)/8;
1493 av_log(avctx, AV_LOG_DEBUG, "marker parser used %d bytes (%d bits)\n",
1494 (get_bits_count(&s->gb)+7)/8, get_bits_count(&s->gb));
1498 if (s->got_picture) {
1499 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1502 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1505 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n", buf_end - buf_ptr);
1506 // return buf_end - buf_ptr;
1507 return buf_ptr - buf;
1510 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1512 MJpegDecodeContext *s = avctx->priv_data;
1515 if (s->picture.data[0])
1516 avctx->release_buffer(avctx, &s->picture);
1519 av_free(s->qscale_table);
1520 av_freep(&s->ljpeg_buffer);
1521 s->ljpeg_buffer_size=0;
1525 free_vlc(&s->vlcs[i][j]);
1527 for(i=0; i<MAX_COMPONENTS; i++) {
1528 av_freep(&s->blocks[i]);
1529 av_freep(&s->last_nnz[i]);
1534 AVCodec mjpeg_decoder = {
1538 sizeof(MJpegDecodeContext),
1539 ff_mjpeg_decode_init,
1541 ff_mjpeg_decode_end,
1542 ff_mjpeg_decode_frame,
1545 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1548 AVCodec thp_decoder = {
1552 sizeof(MJpegDecodeContext),
1553 ff_mjpeg_decode_init,
1555 ff_mjpeg_decode_end,
1556 ff_mjpeg_decode_frame,
1559 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),