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 Libav.
13 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
36 #include "libavutil/imgutils.h"
41 #include "jpeglsdec.h"
44 static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table,
45 int nb_codes, int use_static, int is_ac)
47 uint8_t huff_size[256];
48 uint16_t huff_code[256];
49 uint16_t huff_sym[256];
52 assert(nb_codes <= 256);
54 memset(huff_size, 0, sizeof(huff_size));
55 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
58 huff_sym[i]= i + 16*is_ac;
60 if(is_ac) huff_sym[0]= 16*256;
62 return init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2, huff_sym, 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);
74 build_vlc(&s->vlcs[2][0], ff_mjpeg_bits_ac_luminance,
75 ff_mjpeg_val_ac_luminance, 251, 0, 0);
76 build_vlc(&s->vlcs[2][1], ff_mjpeg_bits_ac_chrominance,
77 ff_mjpeg_val_ac_chrominance, 251, 0, 0);
80 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
82 MJpegDecodeContext *s = avctx->priv_data;
85 s->picture_ptr = &s->picture;
88 dsputil_init(&s->dsp, avctx);
89 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
94 s->org_height = avctx->coded_height;
95 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
97 build_basic_mjpeg_vlc(s);
99 if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
101 av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
102 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size*8);
103 if (ff_mjpeg_decode_dht(s)) {
104 av_log(avctx, AV_LOG_ERROR, "mjpeg: error using external huffman table, switching back to internal\n");
105 build_basic_mjpeg_vlc(s);
108 if (avctx->extradata_size > 9 &&
109 AV_RL32(avctx->extradata + 4) == MKTAG('f','i','e','l')) {
110 if (avctx->extradata[9] == 6) { /* quicktime icefloe 019 */
111 s->interlace_polarity = 1; /* bottom field first */
112 av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
115 if (avctx->codec->id == CODEC_ID_AMV)
122 /* quantize tables */
123 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
125 int len, index, i, j;
127 len = get_bits(&s->gb, 16) - 2;
130 /* only 8 bit precision handled */
131 if (get_bits(&s->gb, 4) != 0)
133 av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
136 index = get_bits(&s->gb, 4);
139 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
140 /* read quant table */
142 j = s->scantable.permutated[i];
143 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
146 //XXX FIXME finetune, and perhaps add dc too
147 s->qscale[index]= FFMAX(
148 s->quant_matrixes[index][s->scantable.permutated[1]],
149 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
150 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n", index, s->qscale[index]);
157 /* decode huffman tables and build VLC decoders */
158 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
160 int len, index, i, class, n, v, code_max;
161 uint8_t bits_table[17];
162 uint8_t val_table[256];
164 len = get_bits(&s->gb, 16) - 2;
169 class = get_bits(&s->gb, 4);
172 index = get_bits(&s->gb, 4);
177 bits_table[i] = get_bits(&s->gb, 8);
181 if (len < n || n > 256)
186 v = get_bits(&s->gb, 8);
193 /* build VLC and flush previous vlc if present */
194 free_vlc(&s->vlcs[class][index]);
195 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
196 class, index, code_max + 1);
197 if(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1, 0, class > 0) < 0){
202 free_vlc(&s->vlcs[2][index]);
203 if(build_vlc(&s->vlcs[2][index], bits_table, val_table, code_max + 1, 0, 0) < 0){
211 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
213 int len, nb_components, i, width, height, pix_fmt_id;
215 /* XXX: verify len field validity */
216 len = get_bits(&s->gb, 16);
217 s->bits= get_bits(&s->gb, 8);
219 if(s->pegasus_rct) s->bits=9;
220 if(s->bits==9 && !s->pegasus_rct) s->rct=1; //FIXME ugly
222 if (s->bits != 8 && !s->lossless){
223 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
227 height = get_bits(&s->gb, 16);
228 width = get_bits(&s->gb, 16);
230 //HACK for odd_height.mov
231 if(s->interlaced && s->width == width && s->height == height + 1)
234 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
235 if(av_image_check_size(width, height, 0, s->avctx))
238 nb_components = get_bits(&s->gb, 8);
239 if (nb_components <= 0 ||
240 nb_components > MAX_COMPONENTS)
242 if (s->ls && !(s->bits <= 8 || nb_components == 1)){
243 av_log(s->avctx, AV_LOG_ERROR, "only <= 8 bits/component or 16-bit gray accepted for JPEG-LS\n");
246 s->nb_components = nb_components;
249 for(i=0;i<nb_components;i++) {
251 s->component_id[i] = get_bits(&s->gb, 8) - 1;
252 s->h_count[i] = get_bits(&s->gb, 4);
253 s->v_count[i] = get_bits(&s->gb, 4);
254 /* compute hmax and vmax (only used in interleaved case) */
255 if (s->h_count[i] > s->h_max)
256 s->h_max = s->h_count[i];
257 if (s->v_count[i] > s->v_max)
258 s->v_max = s->v_count[i];
259 s->quant_index[i] = get_bits(&s->gb, 8);
260 if (s->quant_index[i] >= 4)
262 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n", i, s->h_count[i],
263 s->v_count[i], s->component_id[i], s->quant_index[i]);
266 if(s->ls && (s->h_max > 1 || s->v_max > 1)) {
267 av_log(s->avctx, AV_LOG_ERROR, "Subsampling in JPEG-LS is not supported.\n");
271 if(s->v_max==1 && s->h_max==1 && s->lossless==1) s->rgb=1;
273 /* if different size, realloc/alloc picture */
274 /* XXX: also check h_count and v_count */
275 if (width != s->width || height != s->height) {
276 av_freep(&s->qscale_table);
282 /* test interlaced mode */
283 if (s->first_picture &&
284 s->org_height != 0 &&
285 s->height < ((s->org_height * 3) / 4)) {
287 s->bottom_field = s->interlace_polarity;
288 s->picture_ptr->interlaced_frame = 1;
289 s->picture_ptr->top_field_first = !s->interlace_polarity;
293 avcodec_set_dimensions(s->avctx, width, height);
295 s->qscale_table= av_mallocz((s->width+15)/16);
297 s->first_picture = 0;
300 if(s->interlaced && (s->bottom_field == !s->interlace_polarity))
303 /* XXX: not complete test ! */
304 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
305 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
306 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
307 (s->h_count[3] << 4) | s->v_count[3];
308 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
309 //NOTE we do not allocate pictures large enough for the possible padding of h/v_count being 4
310 if(!(pix_fmt_id & 0xD0D0D0D0))
311 pix_fmt_id-= (pix_fmt_id & 0xF0F0F0F0)>>1;
312 if(!(pix_fmt_id & 0x0D0D0D0D))
313 pix_fmt_id-= (pix_fmt_id & 0x0F0F0F0F)>>1;
318 s->avctx->pix_fmt = PIX_FMT_BGRA;
320 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
321 assert(s->nb_components==3);
324 s->avctx->pix_fmt = PIX_FMT_GRAY8;
327 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV440P : PIX_FMT_YUVJ440P;
330 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
333 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P;
336 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
340 if(s->nb_components > 1)
341 s->avctx->pix_fmt = PIX_FMT_RGB24;
342 else if(s->bits <= 8)
343 s->avctx->pix_fmt = PIX_FMT_GRAY8;
345 s->avctx->pix_fmt = PIX_FMT_GRAY16;
348 if(s->picture_ptr->data[0])
349 s->avctx->release_buffer(s->avctx, s->picture_ptr);
351 if(s->avctx->get_buffer(s->avctx, s->picture_ptr) < 0){
352 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
355 s->picture_ptr->pict_type= AV_PICTURE_TYPE_I;
356 s->picture_ptr->key_frame= 1;
360 s->linesize[i]= s->picture_ptr->linesize[i] << s->interlaced;
363 // printf("%d %d %d %d %d %d\n", s->width, s->height, s->linesize[0], s->linesize[1], s->interlaced, s->avctx->height);
365 if (len != (8+(3*nb_components)))
367 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
370 /* totally blank picture as progressive JPEG will only add details to it */
372 int bw = (width + s->h_max*8-1) / (s->h_max*8);
373 int bh = (height + s->v_max*8-1) / (s->v_max*8);
374 for(i=0; i<s->nb_components; i++) {
375 int size = bw * bh * s->h_count[i] * s->v_count[i];
376 av_freep(&s->blocks[i]);
377 av_freep(&s->last_nnz[i]);
378 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
379 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
380 s->block_stride[i] = bw * s->h_count[i];
382 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
387 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
390 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
393 av_log(s->avctx, AV_LOG_WARNING, "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n", 0, dc_index,
394 &s->vlcs[0][dc_index]);
399 return get_xbits(&s->gb, code);
404 /* decode block and dequantize */
405 static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
406 int component, int dc_index, int ac_index, int16_t *quant_matrix)
408 int code, i, j, level, val;
411 val = mjpeg_decode_dc(s, dc_index);
413 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
416 val = val * quant_matrix[0] + s->last_dc[component];
417 s->last_dc[component] = val;
421 {OPEN_READER(re, &s->gb);
423 UPDATE_CACHE(re, &s->gb);
424 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
426 i += ((unsigned)code) >> 4;
429 if(code > MIN_CACHE_BITS - 16){
430 UPDATE_CACHE(re, &s->gb);
433 int cache=GET_CACHE(re,&s->gb);
434 int sign=(~cache)>>31;
435 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
438 LAST_SKIP_BITS(re, &s->gb, code);
441 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
444 j = s->scantable.permutated[i];
445 block[j] = level * quant_matrix[j];
448 CLOSE_READER(re, &s->gb);}
453 static int decode_dc_progressive(MJpegDecodeContext *s, DCTELEM *block, int component,
454 int dc_index, int16_t *quant_matrix, int Al)
457 s->dsp.clear_block(block);
458 val = mjpeg_decode_dc(s, dc_index);
460 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
463 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
464 s->last_dc[component] = val;
469 /* decode block and dequantize - progressive JPEG version */
470 static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz,
471 int ac_index, int16_t *quant_matrix,
472 int ss, int se, int Al, int *EOBRUN)
474 int code, i, j, level, val, run;
480 {OPEN_READER(re, &s->gb);
482 UPDATE_CACHE(re, &s->gb);
483 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
485 run = ((unsigned) code) >> 4;
489 if(code > MIN_CACHE_BITS - 16){
490 UPDATE_CACHE(re, &s->gb);
493 int cache=GET_CACHE(re,&s->gb);
494 int sign=(~cache)>>31;
495 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
498 LAST_SKIP_BITS(re, &s->gb, code);
502 j = s->scantable.permutated[se];
503 block[j] = level * quant_matrix[j] << Al;
506 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
509 j = s->scantable.permutated[i];
510 block[j] = level * quant_matrix[j] << Al;
512 if(run == 0xF){// ZRL - skip 15 coefficients
515 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
521 UPDATE_CACHE(re, &s->gb);
522 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
523 LAST_SKIP_BITS(re, &s->gb, run);
530 CLOSE_READER(re, &s->gb);}
536 #define REFINE_BIT(j) {\
537 UPDATE_CACHE(re, &s->gb);\
538 sign = block[j]>>15;\
539 block[j] += SHOW_UBITS(re, &s->gb, 1) * ((quant_matrix[j]^sign)-sign) << Al;\
540 LAST_SKIP_BITS(re, &s->gb, 1);\
548 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);\
553 j = s->scantable.permutated[i];\
560 /* decode block and dequantize - progressive JPEG refinement pass */
561 static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz,
562 int ac_index, int16_t *quant_matrix,
563 int ss, int se, int Al, int *EOBRUN)
565 int code, i=ss, j, sign, val, run;
566 int last = FFMIN(se, *last_nnz);
568 OPEN_READER(re, &s->gb);
573 UPDATE_CACHE(re, &s->gb);
574 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
577 run = ((unsigned) code) >> 4;
578 UPDATE_CACHE(re, &s->gb);
579 val = SHOW_UBITS(re, &s->gb, 1);
580 LAST_SKIP_BITS(re, &s->gb, 1);
582 j = s->scantable.permutated[i];
584 block[j] = ((quant_matrix[j]^val)-val) << Al;
588 CLOSE_READER(re, &s->gb);
592 run = ((unsigned) code) >> 4;
599 UPDATE_CACHE(re, &s->gb);
600 run += SHOW_UBITS(re, &s->gb, val);
601 LAST_SKIP_BITS(re, &s->gb, val);
614 j = s->scantable.permutated[i];
618 CLOSE_READER(re, &s->gb);
625 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){
627 uint16_t (*buffer)[4];
628 int left[3], top[3], topleft[3];
629 const int linesize= s->linesize[0];
630 const int mask= (1<<s->bits)-1;
632 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size, (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
633 buffer= s->ljpeg_buffer;
636 buffer[0][i]= 1 << (s->bits + point_transform - 1);
638 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
639 const int modified_predictor= mb_y ? predictor : 1;
640 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
642 if (s->interlaced && s->bottom_field)
643 ptr += linesize >> 1;
646 top[i]= left[i]= topleft[i]= buffer[0][i];
648 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
649 if (s->restart_interval && !s->restart_count)
650 s->restart_count = s->restart_interval;
656 top[i]= buffer[mb_x][i];
658 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
661 buffer[mb_x][i]= mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
664 if (s->restart_interval && !--s->restart_count) {
665 align_get_bits(&s->gb);
666 skip_bits(&s->gb, 16); /* skip RSTn */
671 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
672 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200)>>2);
673 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
674 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
676 }else if(s->pegasus_rct){
677 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
678 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2])>>2);
679 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
680 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
683 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
684 ptr[4*mb_x+0] = buffer[mb_x][2];
685 ptr[4*mb_x+1] = buffer[mb_x][1];
686 ptr[4*mb_x+2] = buffer[mb_x][0];
693 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point_transform){
695 const int nb_components=3;
697 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
698 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
699 if (s->restart_interval && !s->restart_count)
700 s->restart_count = s->restart_interval;
702 if(mb_x==0 || mb_y==0 || s->interlaced){
703 for(i=0;i<nb_components;i++) {
705 int n, h, v, x, y, c, j, linesize;
707 c = s->comp_index[i];
712 linesize= s->linesize[c];
717 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
720 pred= 128 << point_transform;
726 pred= ptr[-linesize];
728 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
732 if (s->interlaced && s->bottom_field)
733 ptr += linesize >> 1;
734 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
743 for(i=0;i<nb_components;i++) {
745 int n, h, v, x, y, c, j, linesize;
747 c = s->comp_index[i];
752 linesize= s->linesize[c];
757 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
758 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
759 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
767 if (s->restart_interval && !--s->restart_count) {
768 align_get_bits(&s->gb);
769 skip_bits(&s->gb, 16); /* skip RSTn */
776 static av_always_inline void mjpeg_copy_block(uint8_t *dst, const uint8_t *src,
777 int linesize, int lowres)
780 case 0: copy_block8(dst, src, linesize, linesize, 8);
782 case 1: copy_block4(dst, src, linesize, linesize, 4);
784 case 2: copy_block2(dst, src, linesize, linesize, 2);
791 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah, int Al,
792 const uint8_t *mb_bitmask, const AVFrame *reference){
794 uint8_t* data[MAX_COMPONENTS];
795 const uint8_t *reference_data[MAX_COMPONENTS];
796 int linesize[MAX_COMPONENTS];
797 GetBitContext mb_bitmask_gb;
800 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width*s->mb_height);
803 if(s->flipped && s->avctx->flags & CODEC_FLAG_EMU_EDGE) {
804 av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with CODEC_FLAG_EMU_EDGE set!\n");
807 for(i=0; i < nb_components; i++) {
808 int c = s->comp_index[i];
809 data[c] = s->picture_ptr->data[c];
810 reference_data[c] = reference ? reference->data[c] : NULL;
811 linesize[c]=s->linesize[c];
812 s->coefs_finished[c] |= 1;
814 //picture should be flipped upside-down for this codec
815 int offset = (linesize[c] * (s->v_scount[i] * (8 * s->mb_height -((s->height/s->v_max)&7)) - 1 ));
817 reference_data[c] += offset;
822 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
823 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
824 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
826 if (s->restart_interval && !s->restart_count)
827 s->restart_count = s->restart_interval;
829 if(get_bits_count(&s->gb)>s->gb.size_in_bits){
830 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n", get_bits_count(&s->gb) - s->gb.size_in_bits);
833 for(i=0;i<nb_components;i++) {
835 int n, h, v, x, y, c, j;
838 c = s->comp_index[i];
844 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
845 (h * mb_x + x) * 8) >> s->avctx->lowres);
847 if(s->interlaced && s->bottom_field)
848 block_offset += linesize[c] >> 1;
849 ptr = data[c] + block_offset;
850 if(!s->progressive) {
852 mjpeg_copy_block(ptr, reference_data[c] + block_offset, linesize[c], s->avctx->lowres);
854 s->dsp.clear_block(s->block);
855 if(decode_block(s, s->block, i,
856 s->dc_index[i], s->ac_index[i],
857 s->quant_matrixes[ s->quant_index[c] ]) < 0) {
858 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
861 s->dsp.idct_put(ptr, linesize[c], s->block);
864 int block_idx = s->block_stride[c] * (v * mb_y + y) + (h * mb_x + x);
865 DCTELEM *block = s->blocks[c][block_idx];
867 block[0] += get_bits1(&s->gb) * s->quant_matrixes[ s->quant_index[c] ][0] << Al;
868 else if(decode_dc_progressive(s, block, i, s->dc_index[i], s->quant_matrixes[ s->quant_index[c] ], Al) < 0) {
869 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
873 // av_log(s->avctx, AV_LOG_DEBUG, "mb: %d %d processed\n", mb_y, mb_x);
874 //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);
882 if (s->restart_interval && show_bits(&s->gb, 8) == 0xFF){ /* skip RSTn */
884 align_get_bits(&s->gb);
885 while(show_bits(&s->gb, 8) == 0xFF)
886 skip_bits(&s->gb, 8);
887 skip_bits(&s->gb, 8);
888 for (i=0; i<nb_components; i++) /* reset dc */
889 s->last_dc[i] = 1024;
896 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss, int se, int Ah, int Al,
897 const uint8_t *mb_bitmask, const AVFrame *reference){
900 int c = s->comp_index[0];
901 uint8_t* data = s->picture_ptr->data[c];
902 const uint8_t *reference_data = reference ? reference->data[c] : NULL;
903 int linesize = s->linesize[c];
905 int16_t *quant_matrix = s->quant_matrixes[ s->quant_index[c] ];
906 GetBitContext mb_bitmask_gb;
909 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width*s->mb_height);
913 s->coefs_finished[c] |= (1LL<<(se+1))-(1LL<<ss);
914 last_scan = !~s->coefs_finished[c];
917 if(s->interlaced && s->bottom_field) {
918 int offset = linesize >> 1;
920 reference_data += offset;
923 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
924 int block_offset = (mb_y*linesize*8 >> s->avctx->lowres);
925 uint8_t *ptr = data + block_offset;
926 int block_idx = mb_y * s->block_stride[c];
927 DCTELEM (*block)[64] = &s->blocks[c][block_idx];
928 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
929 for(mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
930 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
935 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
936 quant_matrix, ss, se, Al, &EOBRUN);
938 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
939 quant_matrix, ss, se, Al, &EOBRUN);
941 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
948 mjpeg_copy_block(ptr, reference_data + block_offset, linesize, s->avctx->lowres);
950 s->dsp.idct_put(ptr, linesize, *block);
951 ptr += 8 >> s->avctx->lowres;
959 int ff_mjpeg_decode_sos(MJpegDecodeContext *s,
960 const uint8_t *mb_bitmask, const AVFrame *reference)
962 int len, nb_components, i, h, v, predictor, point_transform;
964 const int block_size= s->lossless ? 1 : 8;
967 /* XXX: verify len field validity */
968 len = get_bits(&s->gb, 16);
969 nb_components = get_bits(&s->gb, 8);
970 if (nb_components == 0 || nb_components > MAX_COMPONENTS){
971 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: nb_components (%d) unsupported\n", nb_components);
974 if (len != 6+2*nb_components)
976 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
979 for(i=0;i<nb_components;i++) {
980 id = get_bits(&s->gb, 8) - 1;
981 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
982 /* find component index */
983 for(index=0;index<s->nb_components;index++)
984 if (id == s->component_id[index])
986 if (index == s->nb_components)
988 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: index(%d) out of components\n", index);
991 /* Metasoft MJPEG codec has Cb and Cr swapped */
992 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
993 && nb_components == 3 && s->nb_components == 3 && i)
996 s->comp_index[i] = index;
998 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
999 s->h_scount[i] = s->h_count[index];
1000 s->v_scount[i] = s->v_count[index];
1002 s->dc_index[i] = get_bits(&s->gb, 4);
1003 s->ac_index[i] = get_bits(&s->gb, 4);
1005 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1006 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1008 if (!s->vlcs[0][s->dc_index[i]].table || !s->vlcs[1][s->ac_index[i]].table)
1012 predictor= get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1013 ilv= get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1014 prev_shift = get_bits(&s->gb, 4); /* Ah */
1015 point_transform= get_bits(&s->gb, 4); /* Al */
1017 for(i=0;i<nb_components;i++)
1018 s->last_dc[i] = 1024;
1020 if (nb_components > 1) {
1021 /* interleaved stream */
1022 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1023 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1024 } else if(!s->ls) { /* skip this for JPEG-LS */
1025 h = s->h_max / s->h_scount[0];
1026 v = s->v_max / s->v_scount[0];
1027 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1028 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1029 s->nb_blocks[0] = 1;
1034 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1035 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n", s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1036 predictor, point_transform, ilv, s->bits,
1037 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
1040 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1041 for (i = s->mjpb_skiptosod; i > 0; i--)
1042 skip_bits(&s->gb, 8);
1045 if(CONFIG_JPEGLS_DECODER && s->ls){
1047 // reset_ls_coding_parameters(s, 0);
1049 if(ff_jpegls_decode_picture(s, predictor, point_transform, ilv) < 0)
1053 if(ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)
1056 if(ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0)
1061 if(s->progressive && predictor) {
1062 if(mjpeg_decode_scan_progressive_ac(s, predictor, ilv, prev_shift, point_transform,
1063 mb_bitmask, reference) < 0)
1066 if(mjpeg_decode_scan(s, nb_components, prev_shift, point_transform,
1067 mb_bitmask, reference) < 0)
1074 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1078 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1080 if (get_bits(&s->gb, 16) != 4)
1082 s->restart_interval = get_bits(&s->gb, 16);
1083 s->restart_count = 0;
1084 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n", s->restart_interval);
1089 static int mjpeg_decode_app(MJpegDecodeContext *s)
1093 len = get_bits(&s->gb, 16);
1096 if(8*len + get_bits_count(&s->gb) > s->gb.size_in_bits)
1099 id = get_bits_long(&s->gb, 32);
1100 id = av_be2ne32(id);
1103 if(s->avctx->debug & FF_DEBUG_STARTCODE){
1104 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1107 /* buggy AVID, it puts EOI only at every 10th frame */
1108 /* also this fourcc is used by non-avid files too, it holds some
1109 informations, but it's always present in AVID creates files */
1110 if (id == AV_RL32("AVI1"))
1117 4bytes field_size_less_padding
1120 // if (s->first_picture)
1121 // printf("mjpeg: workarounding buggy AVID\n");
1122 i = get_bits(&s->gb, 8);
1123 if (i==2) s->bottom_field= 1;
1124 else if(i==1) s->bottom_field= 0;
1126 skip_bits(&s->gb, 8);
1127 skip_bits(&s->gb, 32);
1128 skip_bits(&s->gb, 32);
1131 // if (s->interlace_polarity)
1132 // printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
1138 if (id == AV_RL32("JFIF"))
1140 int t_w, t_h, v1, v2;
1141 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1142 v1= get_bits(&s->gb, 8);
1143 v2= get_bits(&s->gb, 8);
1144 skip_bits(&s->gb, 8);
1146 s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 16);
1147 s->avctx->sample_aspect_ratio.den= get_bits(&s->gb, 16);
1149 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1150 av_log(s->avctx, AV_LOG_INFO, "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1152 s->avctx->sample_aspect_ratio.num,
1153 s->avctx->sample_aspect_ratio.den
1156 t_w = get_bits(&s->gb, 8);
1157 t_h = get_bits(&s->gb, 8);
1160 /* skip thumbnail */
1161 if (len-10-(t_w*t_h*3) > 0)
1168 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e'))
1170 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1171 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1172 skip_bits(&s->gb, 16); /* version */
1173 skip_bits(&s->gb, 16); /* flags0 */
1174 skip_bits(&s->gb, 16); /* flags1 */
1175 skip_bits(&s->gb, 8); /* transform */
1180 if (id == AV_RL32("LJIF")){
1181 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1182 av_log(s->avctx, AV_LOG_INFO, "Pegasus lossless jpeg header found\n");
1183 skip_bits(&s->gb, 16); /* version ? */
1184 skip_bits(&s->gb, 16); /* unknwon always 0? */
1185 skip_bits(&s->gb, 16); /* unknwon always 0? */
1186 skip_bits(&s->gb, 16); /* unknwon always 0? */
1187 switch( get_bits(&s->gb, 8)){
1197 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1204 if ((s->start_code == APP1) && (len > (0x28 - 8)))
1206 id = get_bits_long(&s->gb, 32);
1207 id = av_be2ne32(id);
1209 if (id == AV_RL32("mjpg")) /* Apple MJPEG-A */
1212 skip_bits(&s->gb, 32); /* field size */
1213 skip_bits(&s->gb, 32); /* pad field size */
1214 skip_bits(&s->gb, 32); /* next off */
1215 skip_bits(&s->gb, 32); /* quant off */
1216 skip_bits(&s->gb, 32); /* huff off */
1217 skip_bits(&s->gb, 32); /* image off */
1218 skip_bits(&s->gb, 32); /* scan off */
1219 skip_bits(&s->gb, 32); /* data off */
1221 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1222 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1227 /* slow but needed for extreme adobe jpegs */
1229 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error, decode_app parser read over the end\n");
1231 skip_bits(&s->gb, 8);
1236 static int mjpeg_decode_com(MJpegDecodeContext *s)
1238 int len = get_bits(&s->gb, 16);
1239 if (len >= 2 && 8*len - 16 + get_bits_count(&s->gb) <= s->gb.size_in_bits) {
1240 char *cbuf = av_malloc(len - 1);
1243 for (i = 0; i < len - 2; i++)
1244 cbuf[i] = get_bits(&s->gb, 8);
1245 if (i > 0 && cbuf[i-1] == '\n')
1250 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1251 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1253 /* buggy avid, it puts EOI only at every 10th frame */
1254 if (!strcmp(cbuf, "AVID"))
1257 // if (s->first_picture)
1258 // printf("mjpeg: workarounding buggy AVID\n");
1260 else if(!strcmp(cbuf, "CS=ITU601")){
1263 else if((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
1264 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20))){
1275 /* return the 8 bit start code value and update the search
1276 state. Return -1 if no start code found */
1277 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1279 const uint8_t *buf_ptr;
1286 buf_ptr = *pbuf_ptr;
1287 while (buf_ptr < buf_end) {
1290 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1300 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1301 *pbuf_ptr = buf_ptr;
1305 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1306 const uint8_t **buf_ptr, const uint8_t *buf_end,
1307 const uint8_t **unescaped_buf_ptr, int *unescaped_buf_size)
1310 start_code = find_marker(buf_ptr, buf_end);
1312 if ((buf_end - *buf_ptr) > s->buffer_size)
1315 s->buffer_size = buf_end - *buf_ptr;
1316 s->buffer = av_malloc(s->buffer_size + FF_INPUT_BUFFER_PADDING_SIZE);
1317 av_log(s->avctx, AV_LOG_DEBUG, "buffer too small, expanding to %d bytes\n",
1321 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1322 if (start_code == SOS && !s->ls)
1324 const uint8_t *src = *buf_ptr;
1325 uint8_t *dst = s->buffer;
1329 uint8_t x = *(src++);
1332 if (s->avctx->codec_id != CODEC_ID_THP)
1335 while (src < buf_end && x == 0xff)
1338 if (x >= 0xd0 && x <= 0xd7)
1345 *unescaped_buf_ptr = s->buffer;
1346 *unescaped_buf_size = dst - s->buffer;
1348 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1349 (buf_end - *buf_ptr) - (dst - s->buffer));
1351 else if(start_code == SOS && s->ls){
1352 const uint8_t *src = *buf_ptr;
1353 uint8_t *dst = s->buffer;
1361 while (src + t < buf_end){
1362 uint8_t x = src[t++];
1364 while((src + t < buf_end) && x == 0xff)
1374 init_put_bits(&pb, dst, t);
1376 /* unescape bitstream */
1378 uint8_t x = src[b++];
1379 put_bits(&pb, 8, x);
1382 put_bits(&pb, 7, x);
1386 flush_put_bits(&pb);
1388 *unescaped_buf_ptr = dst;
1389 *unescaped_buf_size = (bit_count + 7) >> 3;
1393 *unescaped_buf_ptr = *buf_ptr;
1394 *unescaped_buf_size = buf_end - *buf_ptr;
1400 int ff_mjpeg_decode_frame(AVCodecContext *avctx,
1401 void *data, int *data_size,
1404 const uint8_t *buf = avpkt->data;
1405 int buf_size = avpkt->size;
1406 MJpegDecodeContext *s = avctx->priv_data;
1407 const uint8_t *buf_end, *buf_ptr;
1408 const uint8_t *unescaped_buf_ptr;
1409 int unescaped_buf_size;
1411 AVFrame *picture = data;
1413 s->got_picture = 0; // picture from previous image can not be reused
1415 buf_end = buf + buf_size;
1416 while (buf_ptr < buf_end) {
1417 /* find start next marker */
1418 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1419 &unescaped_buf_ptr, &unescaped_buf_size);
1422 if (start_code < 0) {
1425 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n", start_code, buf_end - buf_ptr);
1427 init_get_bits(&s->gb, unescaped_buf_ptr, unescaped_buf_size*8);
1429 s->start_code = start_code;
1430 if(s->avctx->debug & FF_DEBUG_STARTCODE){
1431 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1434 /* process markers */
1435 if (start_code >= 0xd0 && start_code <= 0xd7) {
1436 av_log(avctx, AV_LOG_DEBUG, "restart marker: %d\n", start_code&0x0f);
1438 } else if (start_code >= APP0 && start_code <= APP15) {
1439 mjpeg_decode_app(s);
1441 } else if (start_code == COM){
1442 mjpeg_decode_com(s);
1445 switch(start_code) {
1447 s->restart_interval = 0;
1449 s->restart_count = 0;
1450 /* nothing to do on SOI */
1453 ff_mjpeg_decode_dqt(s);
1456 if(ff_mjpeg_decode_dht(s) < 0){
1457 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1466 if (ff_mjpeg_decode_sof(s) < 0)
1473 if (ff_mjpeg_decode_sof(s) < 0)
1480 if (ff_mjpeg_decode_sof(s) < 0)
1487 if (ff_mjpeg_decode_sof(s) < 0)
1491 if (!CONFIG_JPEGLS_DECODER || ff_jpegls_decode_lse(s) < 0)
1496 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1499 if (!s->got_picture) {
1500 av_log(avctx, AV_LOG_WARNING, "Found EOI before any SOF, ignoring\n");
1503 if (s->interlaced) {
1504 s->bottom_field ^= 1;
1505 /* if not bottom field, do not output image yet */
1506 if (s->bottom_field == !s->interlace_polarity)
1509 *picture = *s->picture_ptr;
1510 *data_size = sizeof(AVFrame);
1513 picture->quality= FFMAX3(s->qscale[0], s->qscale[1], s->qscale[2]);
1514 picture->qstride= 0;
1515 picture->qscale_table= s->qscale_table;
1516 memset(picture->qscale_table, picture->quality, (s->width+15)/16);
1517 if(avctx->debug & FF_DEBUG_QP)
1518 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
1519 picture->quality*= FF_QP2LAMBDA;
1524 if (!s->got_picture) {
1525 av_log(avctx, AV_LOG_WARNING, "Can not process SOS before SOF, skipping\n");
1528 ff_mjpeg_decode_sos(s, NULL, NULL);
1529 /* buggy avid puts EOI every 10-20th frame */
1530 /* if restart period is over process EOI */
1531 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1535 mjpeg_decode_dri(s);
1547 av_log(avctx, AV_LOG_ERROR, "mjpeg: unsupported coding type (%x)\n", start_code);
1550 // printf("mjpeg: unsupported marker (%x)\n", start_code);
1555 /* eof process start code */
1556 buf_ptr += (get_bits_count(&s->gb)+7)/8;
1557 av_log(avctx, AV_LOG_DEBUG, "marker parser used %d bytes (%d bits)\n",
1558 (get_bits_count(&s->gb)+7)/8, get_bits_count(&s->gb));
1562 if (s->got_picture) {
1563 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1566 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1569 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n", buf_end - buf_ptr);
1570 // return buf_end - buf_ptr;
1571 return buf_ptr - buf;
1574 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1576 MJpegDecodeContext *s = avctx->priv_data;
1579 if (s->picture_ptr && s->picture_ptr->data[0])
1580 avctx->release_buffer(avctx, s->picture_ptr);
1583 av_free(s->qscale_table);
1584 av_freep(&s->ljpeg_buffer);
1585 s->ljpeg_buffer_size=0;
1589 free_vlc(&s->vlcs[i][j]);
1591 for(i=0; i<MAX_COMPONENTS; i++) {
1592 av_freep(&s->blocks[i]);
1593 av_freep(&s->last_nnz[i]);
1598 AVCodec ff_mjpeg_decoder = {
1602 sizeof(MJpegDecodeContext),
1603 ff_mjpeg_decode_init,
1605 ff_mjpeg_decode_end,
1606 ff_mjpeg_decode_frame,
1610 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1613 AVCodec ff_thp_decoder = {
1617 sizeof(MJpegDecodeContext),
1618 ff_mjpeg_decode_init,
1620 ff_mjpeg_decode_end,
1621 ff_mjpeg_decode_frame,
1625 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),