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 "libavcore/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 return init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2, huff_sym, 2, 2, use_static);
63 static void build_basic_mjpeg_vlc(MJpegDecodeContext * s) {
64 build_vlc(&s->vlcs[0][0], ff_mjpeg_bits_dc_luminance,
65 ff_mjpeg_val_dc, 12, 0, 0);
66 build_vlc(&s->vlcs[0][1], ff_mjpeg_bits_dc_chrominance,
67 ff_mjpeg_val_dc, 12, 0, 0);
68 build_vlc(&s->vlcs[1][0], ff_mjpeg_bits_ac_luminance,
69 ff_mjpeg_val_ac_luminance, 251, 0, 1);
70 build_vlc(&s->vlcs[1][1], ff_mjpeg_bits_ac_chrominance,
71 ff_mjpeg_val_ac_chrominance, 251, 0, 1);
74 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
76 MJpegDecodeContext *s = avctx->priv_data;
79 dsputil_init(&s->dsp, avctx);
80 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
85 s->org_height = avctx->coded_height;
86 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
88 build_basic_mjpeg_vlc(s);
90 if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
92 av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
93 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size*8);
94 if (ff_mjpeg_decode_dht(s)) {
95 av_log(avctx, AV_LOG_ERROR, "mjpeg: error using external huffman table, switching back to internal\n");
96 build_basic_mjpeg_vlc(s);
99 if (avctx->extradata_size > 9 &&
100 AV_RL32(avctx->extradata + 4) == MKTAG('f','i','e','l')) {
101 if (avctx->extradata[9] == 6) { /* quicktime icefloe 019 */
102 s->interlace_polarity = 1; /* bottom field first */
103 av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
106 if (avctx->codec->id == CODEC_ID_AMV)
113 /* quantize tables */
114 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
116 int len, index, i, j;
118 len = get_bits(&s->gb, 16) - 2;
121 /* only 8 bit precision handled */
122 if (get_bits(&s->gb, 4) != 0)
124 av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
127 index = get_bits(&s->gb, 4);
130 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
131 /* read quant table */
133 j = s->scantable.permutated[i];
134 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
137 //XXX FIXME finetune, and perhaps add dc too
138 s->qscale[index]= FFMAX(
139 s->quant_matrixes[index][s->scantable.permutated[1]],
140 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
141 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n", index, s->qscale[index]);
148 /* decode huffman tables and build VLC decoders */
149 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
151 int len, index, i, class, n, v, code_max;
152 uint8_t bits_table[17];
153 uint8_t val_table[256];
155 len = get_bits(&s->gb, 16) - 2;
160 class = get_bits(&s->gb, 4);
163 index = get_bits(&s->gb, 4);
168 bits_table[i] = get_bits(&s->gb, 8);
172 if (len < n || n > 256)
177 v = get_bits(&s->gb, 8);
184 /* build VLC and flush previous vlc if present */
185 free_vlc(&s->vlcs[class][index]);
186 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
187 class, index, code_max + 1);
188 if(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1, 0, class > 0) < 0){
195 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
197 int len, nb_components, i, width, height, pix_fmt_id;
199 /* XXX: verify len field validity */
200 len = get_bits(&s->gb, 16);
201 s->bits= get_bits(&s->gb, 8);
203 if(s->pegasus_rct) s->bits=9;
204 if(s->bits==9 && !s->pegasus_rct) s->rct=1; //FIXME ugly
206 if (s->bits != 8 && !s->lossless){
207 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
211 height = get_bits(&s->gb, 16);
212 width = get_bits(&s->gb, 16);
214 //HACK for odd_height.mov
215 if(s->interlaced && s->width == width && s->height == height + 1)
218 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
219 if(av_image_check_size(width, height, 0, s->avctx))
222 nb_components = get_bits(&s->gb, 8);
223 if (nb_components <= 0 ||
224 nb_components > MAX_COMPONENTS)
226 if (s->ls && !(s->bits <= 8 || nb_components == 1)){
227 av_log(s->avctx, AV_LOG_ERROR, "only <= 8 bits/component or 16-bit gray accepted for JPEG-LS\n");
230 s->nb_components = nb_components;
233 for(i=0;i<nb_components;i++) {
235 s->component_id[i] = get_bits(&s->gb, 8) - 1;
236 s->h_count[i] = get_bits(&s->gb, 4);
237 s->v_count[i] = get_bits(&s->gb, 4);
238 /* compute hmax and vmax (only used in interleaved case) */
239 if (s->h_count[i] > s->h_max)
240 s->h_max = s->h_count[i];
241 if (s->v_count[i] > s->v_max)
242 s->v_max = s->v_count[i];
243 s->quant_index[i] = get_bits(&s->gb, 8);
244 if (s->quant_index[i] >= 4)
246 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n", i, s->h_count[i],
247 s->v_count[i], s->component_id[i], s->quant_index[i]);
250 if(s->ls && (s->h_max > 1 || s->v_max > 1)) {
251 av_log(s->avctx, AV_LOG_ERROR, "Subsampling in JPEG-LS is not supported.\n");
255 if(s->v_max==1 && s->h_max==1 && s->lossless==1) s->rgb=1;
257 /* if different size, realloc/alloc picture */
258 /* XXX: also check h_count and v_count */
259 if (width != s->width || height != s->height) {
260 av_freep(&s->qscale_table);
266 /* test interlaced mode */
267 if (s->first_picture &&
268 s->org_height != 0 &&
269 s->height < ((s->org_height * 3) / 4)) {
271 s->bottom_field = s->interlace_polarity;
272 s->picture.interlaced_frame = 1;
273 s->picture.top_field_first = !s->interlace_polarity;
277 avcodec_set_dimensions(s->avctx, width, height);
279 s->qscale_table= av_mallocz((s->width+15)/16);
281 s->first_picture = 0;
284 if(s->interlaced && (s->bottom_field == !s->interlace_polarity))
287 /* XXX: not complete test ! */
288 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
289 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
290 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
291 (s->h_count[3] << 4) | s->v_count[3];
292 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
293 //NOTE we do not allocate pictures large enough for the possible padding of h/v_count being 4
294 if(!(pix_fmt_id & 0xD0D0D0D0))
295 pix_fmt_id-= (pix_fmt_id & 0xF0F0F0F0)>>1;
296 if(!(pix_fmt_id & 0x0D0D0D0D))
297 pix_fmt_id-= (pix_fmt_id & 0x0F0F0F0F)>>1;
302 s->avctx->pix_fmt = PIX_FMT_BGRA;
304 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
305 assert(s->nb_components==3);
308 s->avctx->pix_fmt = PIX_FMT_GRAY8;
311 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV440P : PIX_FMT_YUVJ440P;
314 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
317 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P;
320 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
324 if(s->nb_components > 1)
325 s->avctx->pix_fmt = PIX_FMT_RGB24;
326 else if(s->bits <= 8)
327 s->avctx->pix_fmt = PIX_FMT_GRAY8;
329 s->avctx->pix_fmt = PIX_FMT_GRAY16;
332 if(s->picture.data[0])
333 s->avctx->release_buffer(s->avctx, &s->picture);
335 s->picture.reference= 0;
336 if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
337 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
340 s->picture.pict_type= FF_I_TYPE;
341 s->picture.key_frame= 1;
345 s->linesize[i]= s->picture.linesize[i] << s->interlaced;
348 // printf("%d %d %d %d %d %d\n", s->width, s->height, s->linesize[0], s->linesize[1], s->interlaced, s->avctx->height);
350 if (len != (8+(3*nb_components)))
352 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
355 /* totally blank picture as progressive JPEG will only add details to it */
357 int bw = (width + s->h_max*8-1) / (s->h_max*8);
358 int bh = (height + s->v_max*8-1) / (s->v_max*8);
359 for(i=0; i<s->nb_components; i++) {
360 int size = bw * bh * s->h_count[i] * s->v_count[i];
361 av_freep(&s->blocks[i]);
362 av_freep(&s->last_nnz[i]);
363 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
364 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
365 s->block_stride[i] = bw * s->h_count[i];
367 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
372 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
375 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
378 av_log(s->avctx, AV_LOG_WARNING, "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n", 0, dc_index,
379 &s->vlcs[0][dc_index]);
384 return get_xbits(&s->gb, code);
389 /* decode block and dequantize */
390 static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
391 int component, int dc_index, int ac_index, int16_t *quant_matrix)
393 int code, i, j, level, val;
396 val = mjpeg_decode_dc(s, dc_index);
398 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
401 val = val * quant_matrix[0] + s->last_dc[component];
402 s->last_dc[component] = val;
406 {OPEN_READER(re, &s->gb)
408 UPDATE_CACHE(re, &s->gb);
409 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
414 i += ((unsigned)code) >> 4;
417 if(code > MIN_CACHE_BITS - 16){
418 UPDATE_CACHE(re, &s->gb)
421 int cache=GET_CACHE(re,&s->gb);
422 int sign=(~cache)>>31;
423 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
426 LAST_SKIP_BITS(re, &s->gb, code)
430 j = s->scantable.permutated[63];
431 block[j] = level * quant_matrix[j];
434 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
437 j = s->scantable.permutated[i];
438 block[j] = level * quant_matrix[j];
441 CLOSE_READER(re, &s->gb)}
446 static int decode_dc_progressive(MJpegDecodeContext *s, DCTELEM *block, int component,
447 int dc_index, int16_t *quant_matrix, int Al)
450 s->dsp.clear_block(block);
451 val = mjpeg_decode_dc(s, dc_index);
453 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
456 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
457 s->last_dc[component] = val;
462 /* decode block and dequantize - progressive JPEG version */
463 static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz,
464 int ac_index, int16_t *quant_matrix,
465 int ss, int se, int Al, int *EOBRUN)
467 int code, i, j, level, val, run;
473 {OPEN_READER(re, &s->gb)
475 UPDATE_CACHE(re, &s->gb);
476 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
477 /* Progressive JPEG use AC coeffs from zero and this decoder sets offset 16 by default */
479 run = ((unsigned) code) >> 4;
483 if(code > MIN_CACHE_BITS - 16){
484 UPDATE_CACHE(re, &s->gb)
487 int cache=GET_CACHE(re,&s->gb);
488 int sign=(~cache)>>31;
489 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
492 LAST_SKIP_BITS(re, &s->gb, code)
496 j = s->scantable.permutated[se];
497 block[j] = level * quant_matrix[j] << Al;
500 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
503 j = s->scantable.permutated[i];
504 block[j] = level * quant_matrix[j] << Al;
506 if(run == 0xF){// ZRL - skip 15 coefficients
511 UPDATE_CACHE(re, &s->gb);
512 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
513 LAST_SKIP_BITS(re, &s->gb, run);
520 CLOSE_READER(re, &s->gb)}
526 #define REFINE_BIT(j) {\
527 UPDATE_CACHE(re, &s->gb);\
528 sign = block[j]>>15;\
529 block[j] += SHOW_UBITS(re, &s->gb, 1) * ((quant_matrix[j]^sign)-sign) << Al;\
530 LAST_SKIP_BITS(re, &s->gb, 1);\
538 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);\
543 j = s->scantable.permutated[i];\
550 /* decode block and dequantize - progressive JPEG refinement pass */
551 static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz,
552 int ac_index, int16_t *quant_matrix,
553 int ss, int se, int Al, int *EOBRUN)
555 int code, i=ss, j, sign, val, run;
556 int last = FFMIN(se, *last_nnz);
558 OPEN_READER(re, &s->gb);
563 UPDATE_CACHE(re, &s->gb);
564 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
565 /* Progressive JPEG use AC coeffs from zero and this decoder sets offset 16 by default */
568 run = ((unsigned) code) >> 4;
569 UPDATE_CACHE(re, &s->gb);
570 val = SHOW_UBITS(re, &s->gb, 1);
571 LAST_SKIP_BITS(re, &s->gb, 1);
573 j = s->scantable.permutated[i];
575 block[j] = ((quant_matrix[j]^val)-val) << Al;
579 CLOSE_READER(re, &s->gb)
583 run = ((unsigned) code) >> 4;
590 UPDATE_CACHE(re, &s->gb);
591 run += SHOW_UBITS(re, &s->gb, val);
592 LAST_SKIP_BITS(re, &s->gb, val);
605 j = s->scantable.permutated[i];
609 CLOSE_READER(re, &s->gb);
616 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){
618 uint16_t (*buffer)[4];
619 int left[3], top[3], topleft[3];
620 const int linesize= s->linesize[0];
621 const int mask= (1<<s->bits)-1;
623 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size, (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
624 buffer= s->ljpeg_buffer;
627 buffer[0][i]= 1 << (s->bits + point_transform - 1);
629 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
630 const int modified_predictor= mb_y ? predictor : 1;
631 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
633 if (s->interlaced && s->bottom_field)
634 ptr += linesize >> 1;
637 top[i]= left[i]= topleft[i]= buffer[0][i];
639 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
640 if (s->restart_interval && !s->restart_count)
641 s->restart_count = s->restart_interval;
647 top[i]= buffer[mb_x][i];
649 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
652 buffer[mb_x][i]= mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
655 if (s->restart_interval && !--s->restart_count) {
656 align_get_bits(&s->gb);
657 skip_bits(&s->gb, 16); /* skip RSTn */
662 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
663 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200)>>2);
664 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
665 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
667 }else if(s->pegasus_rct){
668 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
669 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2])>>2);
670 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
671 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
674 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
675 ptr[4*mb_x+0] = buffer[mb_x][2];
676 ptr[4*mb_x+1] = buffer[mb_x][1];
677 ptr[4*mb_x+2] = buffer[mb_x][0];
684 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point_transform){
686 const int nb_components=3;
688 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
689 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
690 if (s->restart_interval && !s->restart_count)
691 s->restart_count = s->restart_interval;
693 if(mb_x==0 || mb_y==0 || s->interlaced){
694 for(i=0;i<nb_components;i++) {
696 int n, h, v, x, y, c, j, linesize;
698 c = s->comp_index[i];
703 linesize= s->linesize[c];
708 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
711 pred= 128 << point_transform;
717 pred= ptr[-linesize];
719 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
723 if (s->interlaced && s->bottom_field)
724 ptr += linesize >> 1;
725 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
734 for(i=0;i<nb_components;i++) {
736 int n, h, v, x, y, c, j, linesize;
738 c = s->comp_index[i];
743 linesize= s->linesize[c];
748 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
749 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
750 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
758 if (s->restart_interval && !--s->restart_count) {
759 align_get_bits(&s->gb);
760 skip_bits(&s->gb, 16); /* skip RSTn */
767 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah, int Al){
769 uint8_t* data[MAX_COMPONENTS];
770 int linesize[MAX_COMPONENTS];
772 if(s->flipped && s->avctx->flags & CODEC_FLAG_EMU_EDGE) {
773 av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with CODEC_FLAG_EMU_EDGE set!\n");
776 for(i=0; i < nb_components; i++) {
777 int c = s->comp_index[i];
778 data[c] = s->picture.data[c];
779 linesize[c]=s->linesize[c];
780 s->coefs_finished[c] |= 1;
782 //picture should be flipped upside-down for this codec
783 data[c] += (linesize[c] * (s->v_scount[i] * (8 * s->mb_height -((s->height/s->v_max)&7)) - 1 ));
788 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
789 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
790 if (s->restart_interval && !s->restart_count)
791 s->restart_count = s->restart_interval;
793 for(i=0;i<nb_components;i++) {
795 int n, h, v, x, y, c, j;
797 c = s->comp_index[i];
804 (((linesize[c] * (v * mb_y + y) * 8) +
805 (h * mb_x + x) * 8) >> s->avctx->lowres);
806 if(s->interlaced && s->bottom_field)
807 ptr += linesize[c] >> 1;
808 if(!s->progressive) {
809 s->dsp.clear_block(s->block);
810 if(decode_block(s, s->block, i,
811 s->dc_index[i], s->ac_index[i],
812 s->quant_matrixes[ s->quant_index[c] ]) < 0) {
813 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
816 s->dsp.idct_put(ptr, linesize[c], s->block);
818 int block_idx = s->block_stride[c] * (v * mb_y + y) + (h * mb_x + x);
819 DCTELEM *block = s->blocks[c][block_idx];
821 block[0] += get_bits1(&s->gb) * s->quant_matrixes[ s->quant_index[c] ][0] << Al;
822 else if(decode_dc_progressive(s, block, i, s->dc_index[i], s->quant_matrixes[ s->quant_index[c] ], Al) < 0) {
823 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
827 // av_log(s->avctx, AV_LOG_DEBUG, "mb: %d %d processed\n", mb_y, mb_x);
828 //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);
836 if (s->restart_interval && !--s->restart_count) {
837 align_get_bits(&s->gb);
838 skip_bits(&s->gb, 16); /* skip RSTn */
839 for (i=0; i<nb_components; i++) /* reset dc */
840 s->last_dc[i] = 1024;
847 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss, int se, int Ah, int Al){
850 int c = s->comp_index[0];
851 uint8_t* data = s->picture.data[c];
852 int linesize = s->linesize[c];
854 int16_t *quant_matrix = s->quant_matrixes[ s->quant_index[c] ];
857 s->coefs_finished[c] |= (1LL<<(se+1))-(1LL<<ss);
858 last_scan = !~s->coefs_finished[c];
861 if(s->interlaced && s->bottom_field)
862 data += linesize >> 1;
864 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
865 uint8_t *ptr = data + (mb_y*linesize*8 >> s->avctx->lowres);
866 int block_idx = mb_y * s->block_stride[c];
867 DCTELEM (*block)[64] = &s->blocks[c][block_idx];
868 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
869 for(mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
872 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
873 quant_matrix, ss, se, Al, &EOBRUN);
875 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
876 quant_matrix, ss, se, Al, &EOBRUN);
878 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
882 s->dsp.idct_put(ptr, linesize, *block);
883 ptr += 8 >> s->avctx->lowres;
890 int ff_mjpeg_decode_sos(MJpegDecodeContext *s)
892 int len, nb_components, i, h, v, predictor, point_transform;
894 const int block_size= s->lossless ? 1 : 8;
897 /* XXX: verify len field validity */
898 len = get_bits(&s->gb, 16);
899 nb_components = get_bits(&s->gb, 8);
900 if (nb_components == 0 || nb_components > MAX_COMPONENTS){
901 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: nb_components (%d) unsupported\n", nb_components);
904 if (len != 6+2*nb_components)
906 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
909 for(i=0;i<nb_components;i++) {
910 id = get_bits(&s->gb, 8) - 1;
911 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
912 /* find component index */
913 for(index=0;index<s->nb_components;index++)
914 if (id == s->component_id[index])
916 if (index == s->nb_components)
918 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: index(%d) out of components\n", index);
921 /* Metasoft MJPEG codec has Cb and Cr swapped */
922 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
923 && nb_components == 3 && s->nb_components == 3 && i)
926 s->comp_index[i] = index;
928 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
929 s->h_scount[i] = s->h_count[index];
930 s->v_scount[i] = s->v_count[index];
932 s->dc_index[i] = get_bits(&s->gb, 4);
933 s->ac_index[i] = get_bits(&s->gb, 4);
935 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
936 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
938 if (!s->vlcs[0][s->dc_index[i]].table || !s->vlcs[1][s->ac_index[i]].table)
942 predictor= get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
943 ilv= get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
944 prev_shift = get_bits(&s->gb, 4); /* Ah */
945 point_transform= get_bits(&s->gb, 4); /* Al */
947 for(i=0;i<nb_components;i++)
948 s->last_dc[i] = 1024;
950 if (nb_components > 1) {
951 /* interleaved stream */
952 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
953 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
954 } else if(!s->ls) { /* skip this for JPEG-LS */
955 h = s->h_max / s->h_scount[0];
956 v = s->v_max / s->v_scount[0];
957 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
958 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
964 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
965 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" : "",
966 predictor, point_transform, ilv, s->bits,
967 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
970 /* mjpeg-b can have padding bytes between sos and image data, skip them */
971 for (i = s->mjpb_skiptosod; i > 0; i--)
972 skip_bits(&s->gb, 8);
975 if(CONFIG_JPEGLS_DECODER && s->ls){
977 // reset_ls_coding_parameters(s, 0);
979 if(ff_jpegls_decode_picture(s, predictor, point_transform, ilv) < 0)
983 if(ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)
986 if(ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0)
991 if(s->progressive && predictor) {
992 if(mjpeg_decode_scan_progressive_ac(s, predictor, ilv, prev_shift, point_transform) < 0)
995 if(mjpeg_decode_scan(s, nb_components, prev_shift, point_transform) < 0)
1002 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1006 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1008 if (get_bits(&s->gb, 16) != 4)
1010 s->restart_interval = get_bits(&s->gb, 16);
1011 s->restart_count = 0;
1012 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n", s->restart_interval);
1017 static int mjpeg_decode_app(MJpegDecodeContext *s)
1021 len = get_bits(&s->gb, 16);
1024 if(8*len + get_bits_count(&s->gb) > s->gb.size_in_bits)
1027 id = get_bits_long(&s->gb, 32);
1028 id = av_be2ne32(id);
1031 if(s->avctx->debug & FF_DEBUG_STARTCODE){
1032 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1035 /* buggy AVID, it puts EOI only at every 10th frame */
1036 /* also this fourcc is used by non-avid files too, it holds some
1037 informations, but it's always present in AVID creates files */
1038 if (id == AV_RL32("AVI1"))
1045 4bytes field_size_less_padding
1048 // if (s->first_picture)
1049 // printf("mjpeg: workarounding buggy AVID\n");
1050 i = get_bits(&s->gb, 8);
1051 if (i==2) s->bottom_field= 1;
1052 else if(i==1) s->bottom_field= 0;
1054 skip_bits(&s->gb, 8);
1055 skip_bits(&s->gb, 32);
1056 skip_bits(&s->gb, 32);
1059 // if (s->interlace_polarity)
1060 // printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
1066 if (id == AV_RL32("JFIF"))
1068 int t_w, t_h, v1, v2;
1069 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1070 v1= get_bits(&s->gb, 8);
1071 v2= get_bits(&s->gb, 8);
1072 skip_bits(&s->gb, 8);
1074 s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 16);
1075 s->avctx->sample_aspect_ratio.den= get_bits(&s->gb, 16);
1077 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1078 av_log(s->avctx, AV_LOG_INFO, "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1080 s->avctx->sample_aspect_ratio.num,
1081 s->avctx->sample_aspect_ratio.den
1084 t_w = get_bits(&s->gb, 8);
1085 t_h = get_bits(&s->gb, 8);
1088 /* skip thumbnail */
1089 if (len-10-(t_w*t_h*3) > 0)
1096 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e'))
1098 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1099 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1100 skip_bits(&s->gb, 16); /* version */
1101 skip_bits(&s->gb, 16); /* flags0 */
1102 skip_bits(&s->gb, 16); /* flags1 */
1103 skip_bits(&s->gb, 8); /* transform */
1108 if (id == AV_RL32("LJIF")){
1109 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1110 av_log(s->avctx, AV_LOG_INFO, "Pegasus lossless jpeg header found\n");
1111 skip_bits(&s->gb, 16); /* version ? */
1112 skip_bits(&s->gb, 16); /* unknwon always 0? */
1113 skip_bits(&s->gb, 16); /* unknwon always 0? */
1114 skip_bits(&s->gb, 16); /* unknwon always 0? */
1115 switch( get_bits(&s->gb, 8)){
1125 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1132 if ((s->start_code == APP1) && (len > (0x28 - 8)))
1134 id = get_bits_long(&s->gb, 32);
1135 id = av_be2ne32(id);
1137 if (id == AV_RL32("mjpg")) /* Apple MJPEG-A */
1140 skip_bits(&s->gb, 32); /* field size */
1141 skip_bits(&s->gb, 32); /* pad field size */
1142 skip_bits(&s->gb, 32); /* next off */
1143 skip_bits(&s->gb, 32); /* quant off */
1144 skip_bits(&s->gb, 32); /* huff off */
1145 skip_bits(&s->gb, 32); /* image off */
1146 skip_bits(&s->gb, 32); /* scan off */
1147 skip_bits(&s->gb, 32); /* data off */
1149 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1150 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1155 /* slow but needed for extreme adobe jpegs */
1157 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error, decode_app parser read over the end\n");
1159 skip_bits(&s->gb, 8);
1164 static int mjpeg_decode_com(MJpegDecodeContext *s)
1166 int len = get_bits(&s->gb, 16);
1167 if (len >= 2 && 8*len - 16 + get_bits_count(&s->gb) <= s->gb.size_in_bits) {
1168 char *cbuf = av_malloc(len - 1);
1171 for (i = 0; i < len - 2; i++)
1172 cbuf[i] = get_bits(&s->gb, 8);
1173 if (i > 0 && cbuf[i-1] == '\n')
1178 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1179 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1181 /* buggy avid, it puts EOI only at every 10th frame */
1182 if (!strcmp(cbuf, "AVID"))
1185 // if (s->first_picture)
1186 // printf("mjpeg: workarounding buggy AVID\n");
1188 else if(!strcmp(cbuf, "CS=ITU601")){
1191 else if((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
1192 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20))){
1204 static int valid_marker_list[] =
1206 /* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f */
1207 /* 0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1208 /* 1 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1209 /* 2 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1210 /* 3 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1211 /* 4 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1212 /* 5 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1213 /* 6 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1214 /* 7 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1215 /* 8 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1216 /* 9 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1217 /* a */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1218 /* b */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1219 /* c */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1220 /* d */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1221 /* e */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1222 /* f */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
1226 /* return the 8 bit start code value and update the search
1227 state. Return -1 if no start code found */
1228 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1230 const uint8_t *buf_ptr;
1237 buf_ptr = *pbuf_ptr;
1238 while (buf_ptr < buf_end) {
1241 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1251 dprintf(NULL, "find_marker skipped %d bytes\n", skipped);
1252 *pbuf_ptr = buf_ptr;
1256 int ff_mjpeg_decode_frame(AVCodecContext *avctx,
1257 void *data, int *data_size,
1260 const uint8_t *buf = avpkt->data;
1261 int buf_size = avpkt->size;
1262 MJpegDecodeContext *s = avctx->priv_data;
1263 const uint8_t *buf_end, *buf_ptr;
1265 AVFrame *picture = data;
1267 s->got_picture = 0; // picture from previous image can not be reused
1269 buf_end = buf + buf_size;
1270 while (buf_ptr < buf_end) {
1271 /* find start next marker */
1272 start_code = find_marker(&buf_ptr, buf_end);
1275 if (start_code < 0) {
1278 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n", start_code, buf_end - buf_ptr);
1280 if ((buf_end - buf_ptr) > s->buffer_size)
1283 s->buffer_size = buf_end-buf_ptr;
1284 s->buffer = av_malloc(s->buffer_size + FF_INPUT_BUFFER_PADDING_SIZE);
1285 av_log(avctx, AV_LOG_DEBUG, "buffer too small, expanding to %d bytes\n",
1289 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1290 if (start_code == SOS && !s->ls)
1292 const uint8_t *src = buf_ptr;
1293 uint8_t *dst = s->buffer;
1297 uint8_t x = *(src++);
1300 if (avctx->codec_id != CODEC_ID_THP)
1303 while (src < buf_end && x == 0xff)
1306 if (x >= 0xd0 && x <= 0xd7)
1313 init_get_bits(&s->gb, s->buffer, (dst - s->buffer)*8);
1315 av_log(avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1316 (buf_end - buf_ptr) - (dst - s->buffer));
1318 else if(start_code == SOS && s->ls){
1319 const uint8_t *src = buf_ptr;
1320 uint8_t *dst = s->buffer;
1328 while (src + t < buf_end){
1329 uint8_t x = src[t++];
1331 while((src + t < buf_end) && x == 0xff)
1341 init_put_bits(&pb, dst, t);
1343 /* unescape bitstream */
1345 uint8_t x = src[b++];
1346 put_bits(&pb, 8, x);
1349 put_bits(&pb, 7, x);
1353 flush_put_bits(&pb);
1355 init_get_bits(&s->gb, dst, bit_count);
1358 init_get_bits(&s->gb, buf_ptr, (buf_end - buf_ptr)*8);
1360 s->start_code = start_code;
1361 if(s->avctx->debug & FF_DEBUG_STARTCODE){
1362 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1365 /* process markers */
1366 if (start_code >= 0xd0 && start_code <= 0xd7) {
1367 av_log(avctx, AV_LOG_DEBUG, "restart marker: %d\n", start_code&0x0f);
1369 } else if (start_code >= APP0 && start_code <= APP15) {
1370 mjpeg_decode_app(s);
1372 } else if (start_code == COM){
1373 mjpeg_decode_com(s);
1376 switch(start_code) {
1378 s->restart_interval = 0;
1380 s->restart_count = 0;
1381 /* nothing to do on SOI */
1384 ff_mjpeg_decode_dqt(s);
1387 if(ff_mjpeg_decode_dht(s) < 0){
1388 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1397 if (ff_mjpeg_decode_sof(s) < 0)
1404 if (ff_mjpeg_decode_sof(s) < 0)
1411 if (ff_mjpeg_decode_sof(s) < 0)
1418 if (ff_mjpeg_decode_sof(s) < 0)
1422 if (!CONFIG_JPEGLS_DECODER || ff_jpegls_decode_lse(s) < 0)
1427 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1430 if (!s->got_picture) {
1431 av_log(avctx, AV_LOG_WARNING, "Found EOI before any SOF, ignoring\n");
1435 if (s->interlaced) {
1436 s->bottom_field ^= 1;
1437 /* if not bottom field, do not output image yet */
1438 if (s->bottom_field == !s->interlace_polarity)
1441 *picture = s->picture;
1442 *data_size = sizeof(AVFrame);
1445 picture->quality= FFMAX3(s->qscale[0], s->qscale[1], s->qscale[2]);
1446 picture->qstride= 0;
1447 picture->qscale_table= s->qscale_table;
1448 memset(picture->qscale_table, picture->quality, (s->width+15)/16);
1449 if(avctx->debug & FF_DEBUG_QP)
1450 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
1451 picture->quality*= FF_QP2LAMBDA;
1458 if (!s->got_picture) {
1459 av_log(avctx, AV_LOG_WARNING, "Can not process SOS before SOF, skipping\n");
1462 ff_mjpeg_decode_sos(s);
1463 /* buggy avid puts EOI every 10-20th frame */
1464 /* if restart period is over process EOI */
1465 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1469 mjpeg_decode_dri(s);
1481 av_log(avctx, AV_LOG_ERROR, "mjpeg: unsupported coding type (%x)\n", start_code);
1484 // printf("mjpeg: unsupported marker (%x)\n", start_code);
1489 /* eof process start code */
1490 buf_ptr += (get_bits_count(&s->gb)+7)/8;
1491 av_log(avctx, AV_LOG_DEBUG, "marker parser used %d bytes (%d bits)\n",
1492 (get_bits_count(&s->gb)+7)/8, get_bits_count(&s->gb));
1496 if (s->got_picture) {
1497 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1500 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1503 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n", buf_end - buf_ptr);
1504 // return buf_end - buf_ptr;
1505 return buf_ptr - buf;
1508 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1510 MJpegDecodeContext *s = avctx->priv_data;
1513 if (s->picture.data[0])
1514 avctx->release_buffer(avctx, &s->picture);
1517 av_free(s->qscale_table);
1518 av_freep(&s->ljpeg_buffer);
1519 s->ljpeg_buffer_size=0;
1523 free_vlc(&s->vlcs[i][j]);
1525 for(i=0; i<MAX_COMPONENTS; i++) {
1526 av_freep(&s->blocks[i]);
1527 av_freep(&s->last_nnz[i]);
1532 AVCodec mjpeg_decoder = {
1536 sizeof(MJpegDecodeContext),
1537 ff_mjpeg_decode_init,
1539 ff_mjpeg_decode_end,
1540 ff_mjpeg_decode_frame,
1544 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1547 AVCodec thp_decoder = {
1551 sizeof(MJpegDecodeContext),
1552 ff_mjpeg_decode_init,
1554 ff_mjpeg_decode_end,
1555 ff_mjpeg_decode_frame,
1559 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),