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
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 dsputil_init(&s->dsp, avctx);
86 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
91 s->org_height = avctx->coded_height;
92 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
94 build_basic_mjpeg_vlc(s);
96 if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
98 av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
99 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size*8);
100 if (ff_mjpeg_decode_dht(s)) {
101 av_log(avctx, AV_LOG_ERROR, "mjpeg: error using external huffman table, switching back to internal\n");
102 build_basic_mjpeg_vlc(s);
105 if (avctx->extradata_size > 9 &&
106 AV_RL32(avctx->extradata + 4) == MKTAG('f','i','e','l')) {
107 if (avctx->extradata[9] == 6) { /* quicktime icefloe 019 */
108 s->interlace_polarity = 1; /* bottom field first */
109 av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
112 if (avctx->codec->id == CODEC_ID_AMV)
119 /* quantize tables */
120 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
122 int len, index, i, j;
124 len = get_bits(&s->gb, 16) - 2;
127 /* only 8 bit precision handled */
128 if (get_bits(&s->gb, 4) != 0)
130 av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
133 index = get_bits(&s->gb, 4);
136 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
137 /* read quant table */
139 j = s->scantable.permutated[i];
140 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
143 //XXX FIXME finetune, and perhaps add dc too
144 s->qscale[index]= FFMAX(
145 s->quant_matrixes[index][s->scantable.permutated[1]],
146 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
147 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n", index, s->qscale[index]);
154 /* decode huffman tables and build VLC decoders */
155 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
157 int len, index, i, class, n, v, code_max;
158 uint8_t bits_table[17];
159 uint8_t val_table[256];
161 len = get_bits(&s->gb, 16) - 2;
166 class = get_bits(&s->gb, 4);
169 index = get_bits(&s->gb, 4);
174 bits_table[i] = get_bits(&s->gb, 8);
178 if (len < n || n > 256)
183 v = get_bits(&s->gb, 8);
190 /* build VLC and flush previous vlc if present */
191 free_vlc(&s->vlcs[class][index]);
192 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
193 class, index, code_max + 1);
194 if(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1, 0, class > 0) < 0){
199 free_vlc(&s->vlcs[2][index]);
200 if(build_vlc(&s->vlcs[2][index], bits_table, val_table, code_max + 1, 0, 0) < 0){
208 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
210 int len, nb_components, i, width, height, pix_fmt_id;
212 /* XXX: verify len field validity */
213 len = get_bits(&s->gb, 16);
214 s->bits= get_bits(&s->gb, 8);
216 if(s->pegasus_rct) s->bits=9;
217 if(s->bits==9 && !s->pegasus_rct) s->rct=1; //FIXME ugly
219 if (s->bits != 8 && !s->lossless){
220 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
224 height = get_bits(&s->gb, 16);
225 width = get_bits(&s->gb, 16);
227 //HACK for odd_height.mov
228 if(s->interlaced && s->width == width && s->height == height + 1)
231 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
232 if(av_image_check_size(width, height, 0, s->avctx))
235 nb_components = get_bits(&s->gb, 8);
236 if (nb_components <= 0 ||
237 nb_components > MAX_COMPONENTS)
239 if (s->ls && !(s->bits <= 8 || nb_components == 1)){
240 av_log(s->avctx, AV_LOG_ERROR, "only <= 8 bits/component or 16-bit gray accepted for JPEG-LS\n");
243 s->nb_components = nb_components;
246 for(i=0;i<nb_components;i++) {
248 s->component_id[i] = get_bits(&s->gb, 8) - 1;
249 s->h_count[i] = get_bits(&s->gb, 4);
250 s->v_count[i] = get_bits(&s->gb, 4);
251 /* compute hmax and vmax (only used in interleaved case) */
252 if (s->h_count[i] > s->h_max)
253 s->h_max = s->h_count[i];
254 if (s->v_count[i] > s->v_max)
255 s->v_max = s->v_count[i];
256 s->quant_index[i] = get_bits(&s->gb, 8);
257 if (s->quant_index[i] >= 4)
259 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n", i, s->h_count[i],
260 s->v_count[i], s->component_id[i], s->quant_index[i]);
263 if(s->ls && (s->h_max > 1 || s->v_max > 1)) {
264 av_log(s->avctx, AV_LOG_ERROR, "Subsampling in JPEG-LS is not supported.\n");
268 if(s->v_max==1 && s->h_max==1 && s->lossless==1) s->rgb=1;
270 /* if different size, realloc/alloc picture */
271 /* XXX: also check h_count and v_count */
272 if (width != s->width || height != s->height) {
273 av_freep(&s->qscale_table);
279 /* test interlaced mode */
280 if (s->first_picture &&
281 s->org_height != 0 &&
282 s->height < ((s->org_height * 3) / 4)) {
284 s->bottom_field = s->interlace_polarity;
285 s->picture.interlaced_frame = 1;
286 s->picture.top_field_first = !s->interlace_polarity;
290 avcodec_set_dimensions(s->avctx, width, height);
292 s->qscale_table= av_mallocz((s->width+15)/16);
294 s->first_picture = 0;
297 if(s->interlaced && (s->bottom_field == !s->interlace_polarity))
300 /* XXX: not complete test ! */
301 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
302 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
303 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
304 (s->h_count[3] << 4) | s->v_count[3];
305 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
306 //NOTE we do not allocate pictures large enough for the possible padding of h/v_count being 4
307 if(!(pix_fmt_id & 0xD0D0D0D0))
308 pix_fmt_id-= (pix_fmt_id & 0xF0F0F0F0)>>1;
309 if(!(pix_fmt_id & 0x0D0D0D0D))
310 pix_fmt_id-= (pix_fmt_id & 0x0F0F0F0F)>>1;
315 s->avctx->pix_fmt = PIX_FMT_BGRA;
317 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
318 assert(s->nb_components==3);
321 s->avctx->pix_fmt = PIX_FMT_GRAY8;
324 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV440P : PIX_FMT_YUVJ440P;
327 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
330 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P;
333 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
337 if(s->nb_components > 1)
338 s->avctx->pix_fmt = PIX_FMT_RGB24;
339 else if(s->bits <= 8)
340 s->avctx->pix_fmt = PIX_FMT_GRAY8;
342 s->avctx->pix_fmt = PIX_FMT_GRAY16;
345 if(s->picture.data[0])
346 s->avctx->release_buffer(s->avctx, &s->picture);
348 s->picture.reference= 0;
349 if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
350 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
353 s->picture.pict_type= FF_I_TYPE;
354 s->picture.key_frame= 1;
358 s->linesize[i]= s->picture.linesize[i] << s->interlaced;
361 // printf("%d %d %d %d %d %d\n", s->width, s->height, s->linesize[0], s->linesize[1], s->interlaced, s->avctx->height);
363 if (len != (8+(3*nb_components)))
365 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
368 /* totally blank picture as progressive JPEG will only add details to it */
370 int bw = (width + s->h_max*8-1) / (s->h_max*8);
371 int bh = (height + s->v_max*8-1) / (s->v_max*8);
372 for(i=0; i<s->nb_components; i++) {
373 int size = bw * bh * s->h_count[i] * s->v_count[i];
374 av_freep(&s->blocks[i]);
375 av_freep(&s->last_nnz[i]);
376 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
377 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
378 s->block_stride[i] = bw * s->h_count[i];
380 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
385 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
388 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
391 av_log(s->avctx, AV_LOG_WARNING, "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n", 0, dc_index,
392 &s->vlcs[0][dc_index]);
397 return get_xbits(&s->gb, code);
402 /* decode block and dequantize */
403 static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
404 int component, int dc_index, int ac_index, int16_t *quant_matrix)
406 int code, i, j, level, val;
409 val = mjpeg_decode_dc(s, dc_index);
411 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
414 val = val * quant_matrix[0] + s->last_dc[component];
415 s->last_dc[component] = val;
419 {OPEN_READER(re, &s->gb);
421 UPDATE_CACHE(re, &s->gb);
422 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
424 i += ((unsigned)code) >> 4;
427 if(code > MIN_CACHE_BITS - 16){
428 UPDATE_CACHE(re, &s->gb);
431 int cache=GET_CACHE(re,&s->gb);
432 int sign=(~cache)>>31;
433 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
436 LAST_SKIP_BITS(re, &s->gb, code);
439 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
442 j = s->scantable.permutated[i];
443 block[j] = level * quant_matrix[j];
446 CLOSE_READER(re, &s->gb);}
451 static int decode_dc_progressive(MJpegDecodeContext *s, DCTELEM *block, int component,
452 int dc_index, int16_t *quant_matrix, int Al)
455 s->dsp.clear_block(block);
456 val = mjpeg_decode_dc(s, dc_index);
458 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
461 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
462 s->last_dc[component] = val;
467 /* decode block and dequantize - progressive JPEG version */
468 static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz,
469 int ac_index, int16_t *quant_matrix,
470 int ss, int se, int Al, int *EOBRUN)
472 int code, i, j, level, val, run;
478 {OPEN_READER(re, &s->gb);
480 UPDATE_CACHE(re, &s->gb);
481 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
483 run = ((unsigned) code) >> 4;
487 if(code > MIN_CACHE_BITS - 16){
488 UPDATE_CACHE(re, &s->gb);
491 int cache=GET_CACHE(re,&s->gb);
492 int sign=(~cache)>>31;
493 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
496 LAST_SKIP_BITS(re, &s->gb, code);
500 j = s->scantable.permutated[se];
501 block[j] = level * quant_matrix[j] << Al;
504 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
507 j = s->scantable.permutated[i];
508 block[j] = level * quant_matrix[j] << Al;
510 if(run == 0xF){// ZRL - skip 15 coefficients
513 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
519 UPDATE_CACHE(re, &s->gb);
520 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
521 LAST_SKIP_BITS(re, &s->gb, run);
528 CLOSE_READER(re, &s->gb);}
534 #define REFINE_BIT(j) {\
535 UPDATE_CACHE(re, &s->gb);\
536 sign = block[j]>>15;\
537 block[j] += SHOW_UBITS(re, &s->gb, 1) * ((quant_matrix[j]^sign)-sign) << Al;\
538 LAST_SKIP_BITS(re, &s->gb, 1);\
546 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);\
551 j = s->scantable.permutated[i];\
558 /* decode block and dequantize - progressive JPEG refinement pass */
559 static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz,
560 int ac_index, int16_t *quant_matrix,
561 int ss, int se, int Al, int *EOBRUN)
563 int code, i=ss, j, sign, val, run;
564 int last = FFMIN(se, *last_nnz);
566 OPEN_READER(re, &s->gb);
571 UPDATE_CACHE(re, &s->gb);
572 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
575 run = ((unsigned) code) >> 4;
576 UPDATE_CACHE(re, &s->gb);
577 val = SHOW_UBITS(re, &s->gb, 1);
578 LAST_SKIP_BITS(re, &s->gb, 1);
580 j = s->scantable.permutated[i];
582 block[j] = ((quant_matrix[j]^val)-val) << Al;
586 CLOSE_READER(re, &s->gb);
590 run = ((unsigned) code) >> 4;
597 UPDATE_CACHE(re, &s->gb);
598 run += SHOW_UBITS(re, &s->gb, val);
599 LAST_SKIP_BITS(re, &s->gb, val);
612 j = s->scantable.permutated[i];
616 CLOSE_READER(re, &s->gb);
623 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){
625 uint16_t (*buffer)[4];
626 int left[3], top[3], topleft[3];
627 const int linesize= s->linesize[0];
628 const int mask= (1<<s->bits)-1;
630 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size, (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
631 buffer= s->ljpeg_buffer;
634 buffer[0][i]= 1 << (s->bits + point_transform - 1);
636 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
637 const int modified_predictor= mb_y ? predictor : 1;
638 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
640 if (s->interlaced && s->bottom_field)
641 ptr += linesize >> 1;
644 top[i]= left[i]= topleft[i]= buffer[0][i];
646 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
647 if (s->restart_interval && !s->restart_count)
648 s->restart_count = s->restart_interval;
654 top[i]= buffer[mb_x][i];
656 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
659 buffer[mb_x][i]= mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
662 if (s->restart_interval && !--s->restart_count) {
663 align_get_bits(&s->gb);
664 skip_bits(&s->gb, 16); /* skip RSTn */
669 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
670 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200)>>2);
671 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
672 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
674 }else if(s->pegasus_rct){
675 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
676 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2])>>2);
677 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
678 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
681 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
682 ptr[4*mb_x+0] = buffer[mb_x][2];
683 ptr[4*mb_x+1] = buffer[mb_x][1];
684 ptr[4*mb_x+2] = buffer[mb_x][0];
691 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point_transform){
693 const int nb_components=3;
695 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
696 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
697 if (s->restart_interval && !s->restart_count)
698 s->restart_count = s->restart_interval;
700 if(mb_x==0 || mb_y==0 || s->interlaced){
701 for(i=0;i<nb_components;i++) {
703 int n, h, v, x, y, c, j, linesize;
705 c = s->comp_index[i];
710 linesize= s->linesize[c];
715 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
718 pred= 128 << point_transform;
724 pred= ptr[-linesize];
726 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
730 if (s->interlaced && s->bottom_field)
731 ptr += linesize >> 1;
732 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
741 for(i=0;i<nb_components;i++) {
743 int n, h, v, x, y, c, j, linesize;
745 c = s->comp_index[i];
750 linesize= s->linesize[c];
755 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
756 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
757 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
765 if (s->restart_interval && !--s->restart_count) {
766 align_get_bits(&s->gb);
767 skip_bits(&s->gb, 16); /* skip RSTn */
774 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah, int Al){
776 uint8_t* data[MAX_COMPONENTS];
777 int linesize[MAX_COMPONENTS];
779 if(s->flipped && s->avctx->flags & CODEC_FLAG_EMU_EDGE) {
780 av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with CODEC_FLAG_EMU_EDGE set!\n");
783 for(i=0; i < nb_components; i++) {
784 int c = s->comp_index[i];
785 data[c] = s->picture.data[c];
786 linesize[c]=s->linesize[c];
787 s->coefs_finished[c] |= 1;
789 //picture should be flipped upside-down for this codec
790 data[c] += (linesize[c] * (s->v_scount[i] * (8 * s->mb_height -((s->height/s->v_max)&7)) - 1 ));
795 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
796 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
797 if (s->restart_interval && !s->restart_count)
798 s->restart_count = s->restart_interval;
800 if(get_bits_count(&s->gb)>s->gb.size_in_bits){
801 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n", get_bits_count(&s->gb) - s->gb.size_in_bits);
804 for(i=0;i<nb_components;i++) {
806 int n, h, v, x, y, c, j;
808 c = s->comp_index[i];
815 (((linesize[c] * (v * mb_y + y) * 8) +
816 (h * mb_x + x) * 8) >> s->avctx->lowres);
817 if(s->interlaced && s->bottom_field)
818 ptr += linesize[c] >> 1;
819 if(!s->progressive) {
820 s->dsp.clear_block(s->block);
821 if(decode_block(s, s->block, i,
822 s->dc_index[i], s->ac_index[i],
823 s->quant_matrixes[ s->quant_index[c] ]) < 0) {
824 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
827 s->dsp.idct_put(ptr, linesize[c], s->block);
829 int block_idx = s->block_stride[c] * (v * mb_y + y) + (h * mb_x + x);
830 DCTELEM *block = s->blocks[c][block_idx];
832 block[0] += get_bits1(&s->gb) * s->quant_matrixes[ s->quant_index[c] ][0] << Al;
833 else if(decode_dc_progressive(s, block, i, s->dc_index[i], s->quant_matrixes[ s->quant_index[c] ], Al) < 0) {
834 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
838 // av_log(s->avctx, AV_LOG_DEBUG, "mb: %d %d processed\n", mb_y, mb_x);
839 //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);
847 if (s->restart_interval && !--s->restart_count) {
848 align_get_bits(&s->gb);
849 skip_bits(&s->gb, 16); /* skip RSTn */
850 for (i=0; i<nb_components; i++) /* reset dc */
851 s->last_dc[i] = 1024;
858 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss, int se, int Ah, int Al){
861 int c = s->comp_index[0];
862 uint8_t* data = s->picture.data[c];
863 int linesize = s->linesize[c];
865 int16_t *quant_matrix = s->quant_matrixes[ s->quant_index[c] ];
868 s->coefs_finished[c] |= (1LL<<(se+1))-(1LL<<ss);
869 last_scan = !~s->coefs_finished[c];
872 if(s->interlaced && s->bottom_field)
873 data += linesize >> 1;
875 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
876 uint8_t *ptr = data + (mb_y*linesize*8 >> s->avctx->lowres);
877 int block_idx = mb_y * s->block_stride[c];
878 DCTELEM (*block)[64] = &s->blocks[c][block_idx];
879 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
880 for(mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
883 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
884 quant_matrix, ss, se, Al, &EOBRUN);
886 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
887 quant_matrix, ss, se, Al, &EOBRUN);
889 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
893 s->dsp.idct_put(ptr, linesize, *block);
894 ptr += 8 >> s->avctx->lowres;
901 int ff_mjpeg_decode_sos(MJpegDecodeContext *s)
903 int len, nb_components, i, h, v, predictor, point_transform;
905 const int block_size= s->lossless ? 1 : 8;
908 /* XXX: verify len field validity */
909 len = get_bits(&s->gb, 16);
910 nb_components = get_bits(&s->gb, 8);
911 if (nb_components == 0 || nb_components > MAX_COMPONENTS){
912 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: nb_components (%d) unsupported\n", nb_components);
915 if (len != 6+2*nb_components)
917 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
920 for(i=0;i<nb_components;i++) {
921 id = get_bits(&s->gb, 8) - 1;
922 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
923 /* find component index */
924 for(index=0;index<s->nb_components;index++)
925 if (id == s->component_id[index])
927 if (index == s->nb_components)
929 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: index(%d) out of components\n", index);
932 /* Metasoft MJPEG codec has Cb and Cr swapped */
933 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
934 && nb_components == 3 && s->nb_components == 3 && i)
937 s->comp_index[i] = index;
939 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
940 s->h_scount[i] = s->h_count[index];
941 s->v_scount[i] = s->v_count[index];
943 s->dc_index[i] = get_bits(&s->gb, 4);
944 s->ac_index[i] = get_bits(&s->gb, 4);
946 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
947 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
949 if (!s->vlcs[0][s->dc_index[i]].table || !s->vlcs[1][s->ac_index[i]].table)
953 predictor= get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
954 ilv= get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
955 prev_shift = get_bits(&s->gb, 4); /* Ah */
956 point_transform= get_bits(&s->gb, 4); /* Al */
958 for(i=0;i<nb_components;i++)
959 s->last_dc[i] = 1024;
961 if (nb_components > 1) {
962 /* interleaved stream */
963 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
964 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
965 } else if(!s->ls) { /* skip this for JPEG-LS */
966 h = s->h_max / s->h_scount[0];
967 v = s->v_max / s->v_scount[0];
968 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
969 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
975 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
976 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" : "",
977 predictor, point_transform, ilv, s->bits,
978 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
981 /* mjpeg-b can have padding bytes between sos and image data, skip them */
982 for (i = s->mjpb_skiptosod; i > 0; i--)
983 skip_bits(&s->gb, 8);
986 if(CONFIG_JPEGLS_DECODER && s->ls){
988 // reset_ls_coding_parameters(s, 0);
990 if(ff_jpegls_decode_picture(s, predictor, point_transform, ilv) < 0)
994 if(ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)
997 if(ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0)
1002 if(s->progressive && predictor) {
1003 if(mjpeg_decode_scan_progressive_ac(s, predictor, ilv, prev_shift, point_transform) < 0)
1006 if(mjpeg_decode_scan(s, nb_components, prev_shift, point_transform) < 0)
1013 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1017 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1019 if (get_bits(&s->gb, 16) != 4)
1021 s->restart_interval = get_bits(&s->gb, 16);
1022 s->restart_count = 0;
1023 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n", s->restart_interval);
1028 static int mjpeg_decode_app(MJpegDecodeContext *s)
1032 len = get_bits(&s->gb, 16);
1035 if(8*len + get_bits_count(&s->gb) > s->gb.size_in_bits)
1038 id = get_bits_long(&s->gb, 32);
1039 id = av_be2ne32(id);
1042 if(s->avctx->debug & FF_DEBUG_STARTCODE){
1043 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1046 /* buggy AVID, it puts EOI only at every 10th frame */
1047 /* also this fourcc is used by non-avid files too, it holds some
1048 informations, but it's always present in AVID creates files */
1049 if (id == AV_RL32("AVI1"))
1056 4bytes field_size_less_padding
1059 // if (s->first_picture)
1060 // printf("mjpeg: workarounding buggy AVID\n");
1061 i = get_bits(&s->gb, 8);
1062 if (i==2) s->bottom_field= 1;
1063 else if(i==1) s->bottom_field= 0;
1065 skip_bits(&s->gb, 8);
1066 skip_bits(&s->gb, 32);
1067 skip_bits(&s->gb, 32);
1070 // if (s->interlace_polarity)
1071 // printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
1077 if (id == AV_RL32("JFIF"))
1079 int t_w, t_h, v1, v2;
1080 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1081 v1= get_bits(&s->gb, 8);
1082 v2= get_bits(&s->gb, 8);
1083 skip_bits(&s->gb, 8);
1085 s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 16);
1086 s->avctx->sample_aspect_ratio.den= get_bits(&s->gb, 16);
1088 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1089 av_log(s->avctx, AV_LOG_INFO, "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1091 s->avctx->sample_aspect_ratio.num,
1092 s->avctx->sample_aspect_ratio.den
1095 t_w = get_bits(&s->gb, 8);
1096 t_h = get_bits(&s->gb, 8);
1099 /* skip thumbnail */
1100 if (len-10-(t_w*t_h*3) > 0)
1107 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e'))
1109 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1110 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1111 skip_bits(&s->gb, 16); /* version */
1112 skip_bits(&s->gb, 16); /* flags0 */
1113 skip_bits(&s->gb, 16); /* flags1 */
1114 skip_bits(&s->gb, 8); /* transform */
1119 if (id == AV_RL32("LJIF")){
1120 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1121 av_log(s->avctx, AV_LOG_INFO, "Pegasus lossless jpeg header found\n");
1122 skip_bits(&s->gb, 16); /* version ? */
1123 skip_bits(&s->gb, 16); /* unknwon always 0? */
1124 skip_bits(&s->gb, 16); /* unknwon always 0? */
1125 skip_bits(&s->gb, 16); /* unknwon always 0? */
1126 switch( get_bits(&s->gb, 8)){
1136 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1143 if ((s->start_code == APP1) && (len > (0x28 - 8)))
1145 id = get_bits_long(&s->gb, 32);
1146 id = av_be2ne32(id);
1148 if (id == AV_RL32("mjpg")) /* Apple MJPEG-A */
1151 skip_bits(&s->gb, 32); /* field size */
1152 skip_bits(&s->gb, 32); /* pad field size */
1153 skip_bits(&s->gb, 32); /* next off */
1154 skip_bits(&s->gb, 32); /* quant off */
1155 skip_bits(&s->gb, 32); /* huff off */
1156 skip_bits(&s->gb, 32); /* image off */
1157 skip_bits(&s->gb, 32); /* scan off */
1158 skip_bits(&s->gb, 32); /* data off */
1160 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1161 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1166 /* slow but needed for extreme adobe jpegs */
1168 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error, decode_app parser read over the end\n");
1170 skip_bits(&s->gb, 8);
1175 static int mjpeg_decode_com(MJpegDecodeContext *s)
1177 int len = get_bits(&s->gb, 16);
1178 if (len >= 2 && 8*len - 16 + get_bits_count(&s->gb) <= s->gb.size_in_bits) {
1179 char *cbuf = av_malloc(len - 1);
1182 for (i = 0; i < len - 2; i++)
1183 cbuf[i] = get_bits(&s->gb, 8);
1184 if (i > 0 && cbuf[i-1] == '\n')
1189 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1190 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1192 /* buggy avid, it puts EOI only at every 10th frame */
1193 if (!strcmp(cbuf, "AVID"))
1196 // if (s->first_picture)
1197 // printf("mjpeg: workarounding buggy AVID\n");
1199 else if(!strcmp(cbuf, "CS=ITU601")){
1202 else if((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
1203 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20))){
1215 static int valid_marker_list[] =
1217 /* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f */
1218 /* 0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1219 /* 1 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1220 /* 2 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1221 /* 3 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1222 /* 4 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1223 /* 5 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1224 /* 6 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1225 /* 7 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1226 /* 8 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1227 /* 9 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1228 /* a */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1229 /* b */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1230 /* c */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1231 /* d */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1232 /* e */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1233 /* f */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
1237 /* return the 8 bit start code value and update the search
1238 state. Return -1 if no start code found */
1239 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1241 const uint8_t *buf_ptr;
1248 buf_ptr = *pbuf_ptr;
1249 while (buf_ptr < buf_end) {
1252 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1262 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1263 *pbuf_ptr = buf_ptr;
1267 int ff_mjpeg_decode_frame(AVCodecContext *avctx,
1268 void *data, int *data_size,
1271 const uint8_t *buf = avpkt->data;
1272 int buf_size = avpkt->size;
1273 MJpegDecodeContext *s = avctx->priv_data;
1274 const uint8_t *buf_end, *buf_ptr;
1276 AVFrame *picture = data;
1278 s->got_picture = 0; // picture from previous image can not be reused
1280 buf_end = buf + buf_size;
1281 while (buf_ptr < buf_end) {
1282 /* find start next marker */
1283 start_code = find_marker(&buf_ptr, buf_end);
1286 if (start_code < 0) {
1289 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n", start_code, buf_end - buf_ptr);
1291 if ((buf_end - buf_ptr) > s->buffer_size)
1294 s->buffer_size = buf_end-buf_ptr;
1295 s->buffer = av_malloc(s->buffer_size + FF_INPUT_BUFFER_PADDING_SIZE);
1296 av_log(avctx, AV_LOG_DEBUG, "buffer too small, expanding to %d bytes\n",
1300 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1301 if (start_code == SOS && !s->ls)
1303 const uint8_t *src = buf_ptr;
1304 uint8_t *dst = s->buffer;
1308 uint8_t x = *(src++);
1311 if (avctx->codec_id != CODEC_ID_THP)
1314 while (src < buf_end && x == 0xff)
1317 if (x >= 0xd0 && x <= 0xd7)
1324 init_get_bits(&s->gb, s->buffer, (dst - s->buffer)*8);
1326 av_log(avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1327 (buf_end - buf_ptr) - (dst - s->buffer));
1329 else if(start_code == SOS && s->ls){
1330 const uint8_t *src = buf_ptr;
1331 uint8_t *dst = s->buffer;
1339 while (src + t < buf_end){
1340 uint8_t x = src[t++];
1342 while((src + t < buf_end) && x == 0xff)
1352 init_put_bits(&pb, dst, t);
1354 /* unescape bitstream */
1356 uint8_t x = src[b++];
1357 put_bits(&pb, 8, x);
1360 put_bits(&pb, 7, x);
1364 flush_put_bits(&pb);
1366 init_get_bits(&s->gb, dst, bit_count);
1369 init_get_bits(&s->gb, buf_ptr, (buf_end - buf_ptr)*8);
1371 s->start_code = start_code;
1372 if(s->avctx->debug & FF_DEBUG_STARTCODE){
1373 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1376 /* process markers */
1377 if (start_code >= 0xd0 && start_code <= 0xd7) {
1378 av_log(avctx, AV_LOG_DEBUG, "restart marker: %d\n", start_code&0x0f);
1380 } else if (start_code >= APP0 && start_code <= APP15) {
1381 mjpeg_decode_app(s);
1383 } else if (start_code == COM){
1384 mjpeg_decode_com(s);
1387 switch(start_code) {
1389 s->restart_interval = 0;
1391 s->restart_count = 0;
1392 /* nothing to do on SOI */
1395 ff_mjpeg_decode_dqt(s);
1398 if(ff_mjpeg_decode_dht(s) < 0){
1399 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1408 if (ff_mjpeg_decode_sof(s) < 0)
1415 if (ff_mjpeg_decode_sof(s) < 0)
1422 if (ff_mjpeg_decode_sof(s) < 0)
1429 if (ff_mjpeg_decode_sof(s) < 0)
1433 if (!CONFIG_JPEGLS_DECODER || ff_jpegls_decode_lse(s) < 0)
1438 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1441 if (!s->got_picture) {
1442 av_log(avctx, AV_LOG_WARNING, "Found EOI before any SOF, ignoring\n");
1446 if (s->interlaced) {
1447 s->bottom_field ^= 1;
1448 /* if not bottom field, do not output image yet */
1449 if (s->bottom_field == !s->interlace_polarity)
1452 *picture = s->picture;
1453 *data_size = sizeof(AVFrame);
1456 picture->quality= FFMAX3(s->qscale[0], s->qscale[1], s->qscale[2]);
1457 picture->qstride= 0;
1458 picture->qscale_table= s->qscale_table;
1459 memset(picture->qscale_table, picture->quality, (s->width+15)/16);
1460 if(avctx->debug & FF_DEBUG_QP)
1461 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
1462 picture->quality*= FF_QP2LAMBDA;
1469 if (!s->got_picture) {
1470 av_log(avctx, AV_LOG_WARNING, "Can not process SOS before SOF, skipping\n");
1473 ff_mjpeg_decode_sos(s);
1474 /* buggy avid puts EOI every 10-20th frame */
1475 /* if restart period is over process EOI */
1476 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1480 mjpeg_decode_dri(s);
1492 av_log(avctx, AV_LOG_ERROR, "mjpeg: unsupported coding type (%x)\n", start_code);
1495 // printf("mjpeg: unsupported marker (%x)\n", start_code);
1500 /* eof process start code */
1501 buf_ptr += (get_bits_count(&s->gb)+7)/8;
1502 av_log(avctx, AV_LOG_DEBUG, "marker parser used %d bytes (%d bits)\n",
1503 (get_bits_count(&s->gb)+7)/8, get_bits_count(&s->gb));
1507 if (s->got_picture) {
1508 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1511 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1514 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n", buf_end - buf_ptr);
1515 // return buf_end - buf_ptr;
1516 return buf_ptr - buf;
1519 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1521 MJpegDecodeContext *s = avctx->priv_data;
1524 if (s->picture.data[0])
1525 avctx->release_buffer(avctx, &s->picture);
1528 av_free(s->qscale_table);
1529 av_freep(&s->ljpeg_buffer);
1530 s->ljpeg_buffer_size=0;
1534 free_vlc(&s->vlcs[i][j]);
1536 for(i=0; i<MAX_COMPONENTS; i++) {
1537 av_freep(&s->blocks[i]);
1538 av_freep(&s->last_nnz[i]);
1543 AVCodec ff_mjpeg_decoder = {
1547 sizeof(MJpegDecodeContext),
1548 ff_mjpeg_decode_init,
1550 ff_mjpeg_decode_end,
1551 ff_mjpeg_decode_frame,
1555 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1558 AVCodec ff_thp_decoder = {
1562 sizeof(MJpegDecodeContext),
1563 ff_mjpeg_decode_init,
1565 ff_mjpeg_decode_end,
1566 ff_mjpeg_decode_frame,
1570 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),