3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2003 Alex Beregszaszi
5 * Copyright (c) 2003-2004 Michael Niedermayer
7 * Support for external huffman table, various fixes (AVID workaround),
8 * aspecting, new decode_frame mechanism and apple mjpeg-b support
11 * This file is part of FFmpeg.
13 * FFmpeg is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU Lesser General Public
15 * License as published by the Free Software Foundation; either
16 * version 2.1 of the License, or (at your option) any later version.
18 * FFmpeg is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * Lesser General Public License for more details.
23 * You should have received a copy of the GNU Lesser General Public
24 * License along with FFmpeg; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
29 * @file libavcodec/mjpegdec.c
40 #include "jpeglsdec.h"
43 static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table,
44 int nb_codes, int use_static, int is_ac)
46 uint8_t huff_size[256+16];
47 uint16_t huff_code[256+16];
49 assert(nb_codes <= 256);
51 memset(huff_size, 0, sizeof(huff_size));
52 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
55 memmove(huff_size+16, huff_size, sizeof(uint8_t)*nb_codes);
56 memmove(huff_code+16, huff_code, sizeof(uint16_t)*nb_codes);
57 memset(huff_size, 0, sizeof(uint8_t)*16);
58 memset(huff_code, 0, sizeof(uint16_t)*16);
62 return init_vlc(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2, use_static);
65 static void build_basic_mjpeg_vlc(MJpegDecodeContext * s) {
66 build_vlc(&s->vlcs[0][0], ff_mjpeg_bits_dc_luminance,
67 ff_mjpeg_val_dc, 12, 0, 0);
68 build_vlc(&s->vlcs[0][1], ff_mjpeg_bits_dc_chrominance,
69 ff_mjpeg_val_dc, 12, 0, 0);
70 build_vlc(&s->vlcs[1][0], ff_mjpeg_bits_ac_luminance,
71 ff_mjpeg_val_ac_luminance, 251, 0, 1);
72 build_vlc(&s->vlcs[1][1], ff_mjpeg_bits_ac_chrominance,
73 ff_mjpeg_val_ac_chrominance, 251, 0, 1);
76 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
78 MJpegDecodeContext *s = avctx->priv_data;
81 dsputil_init(&s->dsp, avctx);
82 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
87 s->org_height = avctx->coded_height;
88 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
90 build_basic_mjpeg_vlc(s);
92 if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
94 av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
95 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size*8);
96 if (ff_mjpeg_decode_dht(s)) {
97 av_log(avctx, AV_LOG_ERROR, "mjpeg: error using external huffman table, switching back to internal\n");
98 build_basic_mjpeg_vlc(s);
101 if (avctx->extradata_size > 9 &&
102 AV_RL32(avctx->extradata + 4) == MKTAG('f','i','e','l')) {
103 if (avctx->extradata[9] == 6) { /* quicktime icefloe 019 */
104 s->interlace_polarity = 1; /* bottom field first */
105 av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
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(avcodec_check_dimensions(s->avctx, width, height))
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 if(!(pix_fmt_id & 0x10101010))
294 pix_fmt_id-= (pix_fmt_id & 0xF0F0F0F0)>>1;
295 if(!(pix_fmt_id & 0x01010101))
296 pix_fmt_id-= (pix_fmt_id & 0x0F0F0F0F)>>1;
301 s->avctx->pix_fmt = PIX_FMT_RGB32;
303 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
304 assert(s->nb_components==3);
307 s->avctx->pix_fmt = PIX_FMT_GRAY8;
310 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV440P : PIX_FMT_YUVJ440P;
313 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
316 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P;
319 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
323 if(s->nb_components > 1)
324 s->avctx->pix_fmt = PIX_FMT_RGB24;
325 else if(s->bits <= 8)
326 s->avctx->pix_fmt = PIX_FMT_GRAY8;
328 s->avctx->pix_fmt = PIX_FMT_GRAY16;
331 if(s->picture.data[0])
332 s->avctx->release_buffer(s->avctx, &s->picture);
334 s->picture.reference= 0;
335 if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
336 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
339 s->picture.pict_type= FF_I_TYPE;
340 s->picture.key_frame= 1;
343 s->linesize[i]= s->picture.linesize[i] << s->interlaced;
346 // printf("%d %d %d %d %d %d\n", s->width, s->height, s->linesize[0], s->linesize[1], s->interlaced, s->avctx->height);
348 if (len != (8+(3*nb_components)))
350 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
353 /* totally blank picture as progressive JPEG will only add details to it */
355 int bw = (width + s->h_max*8-1) / (s->h_max*8);
356 int bh = (height + s->v_max*8-1) / (s->v_max*8);
357 for(i=0; i<s->nb_components; i++) {
358 int size = bw * bh * s->h_count[i] * s->v_count[i];
359 av_freep(&s->blocks[i]);
360 av_freep(&s->last_nnz[i]);
361 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
362 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
363 s->block_stride[i] = bw * s->h_count[i];
365 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
370 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
373 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
376 av_log(s->avctx, AV_LOG_WARNING, "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n", 0, dc_index,
377 &s->vlcs[0][dc_index]);
382 return get_xbits(&s->gb, code);
387 /* decode block and dequantize */
388 static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
389 int component, int dc_index, int ac_index, int16_t *quant_matrix)
391 int code, i, j, level, val;
394 val = mjpeg_decode_dc(s, dc_index);
396 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
399 val = val * quant_matrix[0] + s->last_dc[component];
400 s->last_dc[component] = val;
404 {OPEN_READER(re, &s->gb)
406 UPDATE_CACHE(re, &s->gb);
407 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
412 i += ((unsigned)code) >> 4;
415 if(code > MIN_CACHE_BITS - 16){
416 UPDATE_CACHE(re, &s->gb)
419 int cache=GET_CACHE(re,&s->gb);
420 int sign=(~cache)>>31;
421 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
424 LAST_SKIP_BITS(re, &s->gb, code)
428 j = s->scantable.permutated[63];
429 block[j] = level * quant_matrix[j];
432 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
435 j = s->scantable.permutated[i];
436 block[j] = level * quant_matrix[j];
439 CLOSE_READER(re, &s->gb)}
444 static int decode_dc_progressive(MJpegDecodeContext *s, DCTELEM *block, int component,
445 int dc_index, int16_t *quant_matrix, int Al)
448 s->dsp.clear_block(block);
449 val = mjpeg_decode_dc(s, dc_index);
451 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
454 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
455 s->last_dc[component] = val;
460 /* decode block and dequantize - progressive JPEG version */
461 static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz,
462 int ac_index, int16_t *quant_matrix,
463 int ss, int se, int Al, int *EOBRUN)
465 int code, i, j, level, val, run;
471 {OPEN_READER(re, &s->gb)
473 UPDATE_CACHE(re, &s->gb);
474 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
475 /* Progressive JPEG use AC coeffs from zero and this decoder sets offset 16 by default */
478 i += ((unsigned) code) >> 4;
480 if(code > MIN_CACHE_BITS - 16){
481 UPDATE_CACHE(re, &s->gb)
484 int cache=GET_CACHE(re,&s->gb);
485 int sign=(~cache)>>31;
486 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
489 LAST_SKIP_BITS(re, &s->gb, code)
493 j = s->scantable.permutated[se];
494 block[j] = level * quant_matrix[j] << Al;
497 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
500 j = s->scantable.permutated[i];
501 block[j] = level * quant_matrix[j] << Al;
503 run = ((unsigned) code) >> 4;
504 if(run == 0xF){// ZRL - skip 15 coefficients
509 UPDATE_CACHE(re, &s->gb);
510 run += (GET_CACHE(re, &s->gb) >> (32 - val)) & (run - 1);
512 LAST_SKIP_BITS(re, &s->gb, val);
518 CLOSE_READER(re, &s->gb)}
524 #define REFINE_BIT(j) {\
525 UPDATE_CACHE(re, &s->gb);\
526 sign = block[j]>>15;\
527 block[j] += SHOW_UBITS(re, &s->gb, 1) * ((quant_matrix[j]^sign)-sign) << Al;\
528 LAST_SKIP_BITS(re, &s->gb, 1);\
536 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);\
541 j = s->scantable.permutated[i];\
548 /* decode block and dequantize - progressive JPEG refinement pass */
549 static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz,
550 int ac_index, int16_t *quant_matrix,
551 int ss, int se, int Al, int *EOBRUN)
553 int code, i=ss, j, sign, val, run;
554 int last = FFMIN(se, *last_nnz);
556 OPEN_READER(re, &s->gb);
561 UPDATE_CACHE(re, &s->gb);
562 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
563 /* Progressive JPEG use AC coeffs from zero and this decoder sets offset 16 by default */
566 run = ((unsigned) code) >> 4;
567 UPDATE_CACHE(re, &s->gb);
568 val = SHOW_UBITS(re, &s->gb, 1);
569 LAST_SKIP_BITS(re, &s->gb, 1);
571 j = s->scantable.permutated[i];
573 block[j] = ((quant_matrix[j]^val)-val) << Al;
577 CLOSE_READER(re, &s->gb)
581 run = ((unsigned) code) >> 4;
588 UPDATE_CACHE(re, &s->gb);
589 run += SHOW_UBITS(re, &s->gb, val);
590 LAST_SKIP_BITS(re, &s->gb, val);
603 j = s->scantable.permutated[i];
607 CLOSE_READER(re, &s->gb);
614 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){
616 uint16_t buffer[32768][4];
617 int left[3], top[3], topleft[3];
618 const int linesize= s->linesize[0];
619 const int mask= (1<<s->bits)-1;
621 if((unsigned)s->mb_width > 32768) //dynamic alloc
625 buffer[0][i]= 1 << (s->bits + point_transform - 1);
627 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
628 const int modified_predictor= mb_y ? predictor : 1;
629 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
631 if (s->interlaced && s->bottom_field)
632 ptr += linesize >> 1;
635 top[i]= left[i]= topleft[i]= buffer[0][i];
637 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
638 if (s->restart_interval && !s->restart_count)
639 s->restart_count = s->restart_interval;
645 top[i]= buffer[mb_x][i];
647 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
650 buffer[mb_x][i]= mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
653 if (s->restart_interval && !--s->restart_count) {
654 align_get_bits(&s->gb);
655 skip_bits(&s->gb, 16); /* skip RSTn */
660 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
661 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200)>>2);
662 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
663 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
665 }else if(s->pegasus_rct){
666 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
667 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2])>>2);
668 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
669 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
672 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
673 ptr[4*mb_x+0] = buffer[mb_x][0];
674 ptr[4*mb_x+1] = buffer[mb_x][1];
675 ptr[4*mb_x+2] = buffer[mb_x][2];
682 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point_transform){
684 const int nb_components=3;
686 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
687 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
688 if (s->restart_interval && !s->restart_count)
689 s->restart_count = s->restart_interval;
691 if(mb_x==0 || mb_y==0 || s->interlaced){
692 for(i=0;i<nb_components;i++) {
694 int n, h, v, x, y, c, j, linesize;
696 c = s->comp_index[i];
701 linesize= s->linesize[c];
706 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
709 pred= 128 << point_transform;
715 pred= ptr[-linesize];
717 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
721 if (s->interlaced && s->bottom_field)
722 ptr += linesize >> 1;
723 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
732 for(i=0;i<nb_components;i++) {
734 int n, h, v, x, y, c, j, linesize;
736 c = s->comp_index[i];
741 linesize= s->linesize[c];
746 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
747 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
748 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
756 if (s->restart_interval && !--s->restart_count) {
757 align_get_bits(&s->gb);
758 skip_bits(&s->gb, 16); /* skip RSTn */
765 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah, int Al){
767 uint8_t* data[MAX_COMPONENTS];
768 int linesize[MAX_COMPONENTS];
770 for(i=0; i < nb_components; i++) {
771 int c = s->comp_index[i];
772 data[c] = s->picture.data[c];
773 linesize[c]=s->linesize[c];
774 s->coefs_finished[c] |= 1;
775 if(s->avctx->codec->id==CODEC_ID_AMV) {
776 //picture should be flipped upside-down for this codec
777 assert(!(s->avctx->flags & CODEC_FLAG_EMU_EDGE));
778 data[c] += (linesize[c] * (s->v_scount[i] * (8 * s->mb_height -((s->height/s->v_max)&7)) - 1 ));
783 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
784 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
785 if (s->restart_interval && !s->restart_count)
786 s->restart_count = s->restart_interval;
788 for(i=0;i<nb_components;i++) {
790 int n, h, v, x, y, c, j;
792 c = s->comp_index[i];
799 (((linesize[c] * (v * mb_y + y) * 8) +
800 (h * mb_x + x) * 8) >> s->avctx->lowres);
801 if(s->interlaced && s->bottom_field)
802 ptr += linesize[c] >> 1;
803 if(!s->progressive) {
804 s->dsp.clear_block(s->block);
805 if(decode_block(s, s->block, i,
806 s->dc_index[i], s->ac_index[i],
807 s->quant_matrixes[ s->quant_index[c] ]) < 0) {
808 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
811 s->dsp.idct_put(ptr, linesize[c], s->block);
813 int block_idx = s->block_stride[c] * (v * mb_y + y) + (h * mb_x + x);
814 DCTELEM *block = s->blocks[c][block_idx];
816 block[0] += get_bits1(&s->gb) * s->quant_matrixes[ s->quant_index[c] ][0] << Al;
817 else if(decode_dc_progressive(s, block, i, s->dc_index[i], s->quant_matrixes[ s->quant_index[c] ], Al) < 0) {
818 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
822 // av_log(s->avctx, AV_LOG_DEBUG, "mb: %d %d processed\n", mb_y, mb_x);
823 //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);
830 /* (< 1350) buggy workaround for Spectralfan.mov, should be fixed */
831 if (s->restart_interval && (s->restart_interval < 1350) &&
832 !--s->restart_count) {
833 align_get_bits(&s->gb);
834 skip_bits(&s->gb, 16); /* skip RSTn */
835 for (i=0; i<nb_components; i++) /* reset dc */
836 s->last_dc[i] = 1024;
843 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss, int se, int Ah, int Al){
846 int c = s->comp_index[0];
847 uint8_t* data = s->picture.data[c];
848 int linesize = s->linesize[c];
850 int16_t *quant_matrix = s->quant_matrixes[ s->quant_index[c] ];
853 s->coefs_finished[c] |= (1LL<<(se+1))-(1LL<<ss);
854 last_scan = !~s->coefs_finished[c];
857 if(s->interlaced && s->bottom_field)
858 data += linesize >> 1;
860 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
861 uint8_t *ptr = data + (mb_y*linesize*8 >> s->avctx->lowres);
862 int block_idx = mb_y * s->block_stride[c];
863 DCTELEM (*block)[64] = &s->blocks[c][block_idx];
864 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
865 for(mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
868 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
869 quant_matrix, ss, se, Al, &EOBRUN);
871 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
872 quant_matrix, ss, se, Al, &EOBRUN);
874 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
878 s->dsp.idct_put(ptr, linesize, *block);
879 ptr += 8 >> s->avctx->lowres;
886 int ff_mjpeg_decode_sos(MJpegDecodeContext *s)
888 int len, nb_components, i, h, v, predictor, point_transform;
890 const int block_size= s->lossless ? 1 : 8;
893 /* XXX: verify len field validity */
894 len = get_bits(&s->gb, 16);
895 nb_components = get_bits(&s->gb, 8);
896 if (len != 6+2*nb_components)
898 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
901 for(i=0;i<nb_components;i++) {
902 id = get_bits(&s->gb, 8) - 1;
903 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
904 /* find component index */
905 for(index=0;index<s->nb_components;index++)
906 if (id == s->component_id[index])
908 if (index == s->nb_components)
910 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: index(%d) out of components\n", index);
914 s->comp_index[i] = index;
916 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
917 s->h_scount[i] = s->h_count[index];
918 s->v_scount[i] = s->v_count[index];
920 s->dc_index[i] = get_bits(&s->gb, 4);
921 s->ac_index[i] = get_bits(&s->gb, 4);
923 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
924 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
927 switch(s->start_code)
930 if (dc_index[i] > 1 || ac_index[i] > 1)
935 if (dc_index[i] > 3 || ac_index[i] > 3)
939 if (dc_index[i] > 3 || ac_index[i] != 0)
946 predictor= get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
947 ilv= get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
948 prev_shift = get_bits(&s->gb, 4); /* Ah */
949 point_transform= get_bits(&s->gb, 4); /* Al */
951 for(i=0;i<nb_components;i++)
952 s->last_dc[i] = 1024;
954 if (nb_components > 1) {
955 /* interleaved stream */
956 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
957 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
958 } else if(!s->ls) { /* skip this for JPEG-LS */
959 h = s->h_max / s->h_scount[0];
960 v = s->v_max / s->v_scount[0];
961 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
962 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
968 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
969 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n", s->lossless ? "lossless" : "sequencial DCT", s->rgb ? "RGB" : "",
970 predictor, point_transform, ilv, s->bits,
971 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
974 /* mjpeg-b can have padding bytes between sos and image data, skip them */
975 for (i = s->mjpb_skiptosod; i > 0; i--)
976 skip_bits(&s->gb, 8);
979 if(CONFIG_JPEGLS_DECODER && s->ls){
981 // reset_ls_coding_parameters(s, 0);
983 if(ff_jpegls_decode_picture(s, predictor, point_transform, ilv) < 0)
987 if(ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)
990 if(ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0)
995 if(s->progressive && predictor) {
996 if(mjpeg_decode_scan_progressive_ac(s, predictor, ilv, prev_shift, point_transform) < 0)
999 if(mjpeg_decode_scan(s, nb_components, prev_shift, point_transform) < 0)
1006 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1010 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1012 if (get_bits(&s->gb, 16) != 4)
1014 s->restart_interval = get_bits(&s->gb, 16);
1015 s->restart_count = 0;
1016 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n", s->restart_interval);
1021 static int mjpeg_decode_app(MJpegDecodeContext *s)
1025 len = get_bits(&s->gb, 16);
1028 if(8*len + get_bits_count(&s->gb) > s->gb.size_in_bits)
1031 id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
1035 if(s->avctx->debug & FF_DEBUG_STARTCODE){
1036 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1039 /* buggy AVID, it puts EOI only at every 10th frame */
1040 /* also this fourcc is used by non-avid files too, it holds some
1041 informations, but it's always present in AVID creates files */
1042 if (id == AV_RL32("AVI1"))
1049 4bytes field_size_less_padding
1052 // if (s->first_picture)
1053 // printf("mjpeg: workarounding buggy AVID\n");
1054 i = get_bits(&s->gb, 8);
1055 if (i==2) s->bottom_field= 1;
1056 else if(i==1) s->bottom_field= 0;
1058 skip_bits(&s->gb, 8);
1059 skip_bits(&s->gb, 32);
1060 skip_bits(&s->gb, 32);
1063 // if (s->interlace_polarity)
1064 // printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
1070 if (id == AV_RL32("JFIF"))
1072 int t_w, t_h, v1, v2;
1073 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1074 v1= get_bits(&s->gb, 8);
1075 v2= get_bits(&s->gb, 8);
1076 skip_bits(&s->gb, 8);
1078 s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 16);
1079 s->avctx->sample_aspect_ratio.den= get_bits(&s->gb, 16);
1081 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1082 av_log(s->avctx, AV_LOG_INFO, "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1084 s->avctx->sample_aspect_ratio.num,
1085 s->avctx->sample_aspect_ratio.den
1088 t_w = get_bits(&s->gb, 8);
1089 t_h = get_bits(&s->gb, 8);
1092 /* skip thumbnail */
1093 if (len-10-(t_w*t_h*3) > 0)
1100 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e'))
1102 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1103 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1104 skip_bits(&s->gb, 16); /* version */
1105 skip_bits(&s->gb, 16); /* flags0 */
1106 skip_bits(&s->gb, 16); /* flags1 */
1107 skip_bits(&s->gb, 8); /* transform */
1112 if (id == AV_RL32("LJIF")){
1113 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1114 av_log(s->avctx, AV_LOG_INFO, "Pegasus lossless jpeg header found\n");
1115 skip_bits(&s->gb, 16); /* version ? */
1116 skip_bits(&s->gb, 16); /* unknwon always 0? */
1117 skip_bits(&s->gb, 16); /* unknwon always 0? */
1118 skip_bits(&s->gb, 16); /* unknwon always 0? */
1119 switch( get_bits(&s->gb, 8)){
1129 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1136 if ((s->start_code == APP1) && (len > (0x28 - 8)))
1138 id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
1141 if (id == AV_RL32("mjpg")) /* Apple MJPEG-A */
1144 skip_bits(&s->gb, 32); /* field size */
1145 skip_bits(&s->gb, 32); /* pad field size */
1146 skip_bits(&s->gb, 32); /* next off */
1147 skip_bits(&s->gb, 32); /* quant off */
1148 skip_bits(&s->gb, 32); /* huff off */
1149 skip_bits(&s->gb, 32); /* image off */
1150 skip_bits(&s->gb, 32); /* scan off */
1151 skip_bits(&s->gb, 32); /* data off */
1153 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1154 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1159 /* slow but needed for extreme adobe jpegs */
1161 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error, decode_app parser read over the end\n");
1163 skip_bits(&s->gb, 8);
1168 static int mjpeg_decode_com(MJpegDecodeContext *s)
1170 int len = get_bits(&s->gb, 16);
1171 if (len >= 2 && 8*len - 16 + get_bits_count(&s->gb) <= s->gb.size_in_bits) {
1172 char *cbuf = av_malloc(len - 1);
1175 for (i = 0; i < len - 2; i++)
1176 cbuf[i] = get_bits(&s->gb, 8);
1177 if (i > 0 && cbuf[i-1] == '\n')
1182 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1183 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1185 /* buggy avid, it puts EOI only at every 10th frame */
1186 if (!strcmp(cbuf, "AVID"))
1189 // if (s->first_picture)
1190 // printf("mjpeg: workarounding buggy AVID\n");
1192 else if(!strcmp(cbuf, "CS=ITU601")){
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) {
1252 av_log(NULL, AV_LOG_VERBOSE, "find_marker skipped %d bytes\n", skipped);
1254 *pbuf_ptr = buf_ptr;
1258 int ff_mjpeg_decode_frame(AVCodecContext *avctx,
1259 void *data, int *data_size,
1262 const uint8_t *buf = avpkt->data;
1263 int buf_size = avpkt->size;
1264 MJpegDecodeContext *s = avctx->priv_data;
1265 const uint8_t *buf_end, *buf_ptr;
1267 AVFrame *picture = data;
1270 buf_end = buf + buf_size;
1271 while (buf_ptr < buf_end) {
1272 /* find start next marker */
1273 start_code = find_marker(&buf_ptr, buf_end);
1276 if (start_code < 0) {
1279 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n", start_code, buf_end - buf_ptr);
1281 if ((buf_end - buf_ptr) > s->buffer_size)
1284 s->buffer_size = buf_end-buf_ptr;
1285 s->buffer = av_malloc(s->buffer_size + FF_INPUT_BUFFER_PADDING_SIZE);
1286 av_log(avctx, AV_LOG_DEBUG, "buffer too small, expanding to %d bytes\n",
1290 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1291 if (start_code == SOS && !s->ls)
1293 const uint8_t *src = buf_ptr;
1294 uint8_t *dst = s->buffer;
1298 uint8_t x = *(src++);
1301 if (avctx->codec_id != CODEC_ID_THP)
1304 while (src < buf_end && x == 0xff)
1307 if (x >= 0xd0 && x <= 0xd7)
1314 init_get_bits(&s->gb, s->buffer, (dst - s->buffer)*8);
1316 av_log(avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1317 (buf_end - buf_ptr) - (dst - s->buffer));
1319 else if(start_code == SOS && s->ls){
1320 const uint8_t *src = buf_ptr;
1321 uint8_t *dst = s->buffer;
1329 while (src + t < buf_end){
1330 uint8_t x = src[t++];
1332 while((src + t < buf_end) && x == 0xff)
1342 init_put_bits(&pb, dst, t);
1344 /* unescape bitstream */
1346 uint8_t x = src[b++];
1347 put_bits(&pb, 8, x);
1350 put_bits(&pb, 7, x);
1354 flush_put_bits(&pb);
1356 init_get_bits(&s->gb, dst, bit_count);
1359 init_get_bits(&s->gb, buf_ptr, (buf_end - buf_ptr)*8);
1361 s->start_code = start_code;
1362 if(s->avctx->debug & FF_DEBUG_STARTCODE){
1363 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1366 /* process markers */
1367 if (start_code >= 0xd0 && start_code <= 0xd7) {
1368 av_log(avctx, AV_LOG_DEBUG, "restart marker: %d\n", start_code&0x0f);
1370 } else if (start_code >= APP0 && start_code <= APP15) {
1371 mjpeg_decode_app(s);
1373 } else if (start_code == COM){
1374 mjpeg_decode_com(s);
1377 switch(start_code) {
1379 s->restart_interval = 0;
1381 s->restart_count = 0;
1382 /* nothing to do on SOI */
1385 ff_mjpeg_decode_dqt(s);
1388 if(ff_mjpeg_decode_dht(s) < 0){
1389 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)
1431 if (s->interlaced) {
1432 s->bottom_field ^= 1;
1433 /* if not bottom field, do not output image yet */
1434 if (s->bottom_field == !s->interlace_polarity)
1437 *picture = s->picture;
1438 *data_size = sizeof(AVFrame);
1441 picture->quality= FFMAX3(s->qscale[0], s->qscale[1], s->qscale[2]);
1442 picture->qstride= 0;
1443 picture->qscale_table= s->qscale_table;
1444 memset(picture->qscale_table, picture->quality, (s->width+15)/16);
1445 if(avctx->debug & FF_DEBUG_QP)
1446 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
1447 picture->quality*= FF_QP2LAMBDA;
1454 ff_mjpeg_decode_sos(s);
1455 /* buggy avid puts EOI every 10-20th frame */
1456 /* if restart period is over process EOI */
1457 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1461 mjpeg_decode_dri(s);
1474 av_log(avctx, AV_LOG_ERROR, "mjpeg: unsupported coding type (%x)\n", start_code);
1477 // printf("mjpeg: unsupported marker (%x)\n", start_code);
1482 /* eof process start code */
1483 buf_ptr += (get_bits_count(&s->gb)+7)/8;
1484 av_log(avctx, AV_LOG_DEBUG, "marker parser used %d bytes (%d bits)\n",
1485 (get_bits_count(&s->gb)+7)/8, get_bits_count(&s->gb));
1490 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n", buf_end - buf_ptr);
1491 // return buf_end - buf_ptr;
1492 return buf_ptr - buf;
1495 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1497 MJpegDecodeContext *s = avctx->priv_data;
1501 av_free(s->qscale_table);
1505 free_vlc(&s->vlcs[i][j]);
1507 for(i=0; i<MAX_COMPONENTS; i++) {
1508 av_freep(&s->blocks[i]);
1509 av_freep(&s->last_nnz[i]);
1514 AVCodec mjpeg_decoder = {
1518 sizeof(MJpegDecodeContext),
1519 ff_mjpeg_decode_init,
1521 ff_mjpeg_decode_end,
1522 ff_mjpeg_decode_frame,
1525 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1528 AVCodec thp_decoder = {
1532 sizeof(MJpegDecodeContext),
1533 ff_mjpeg_decode_init,
1535 ff_mjpeg_decode_end,
1536 ff_mjpeg_decode_frame,
1539 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),