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"
37 #include "libavutil/avassert.h"
38 #include "libavutil/opt.h"
43 #include "jpeglsdec.h"
46 static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table,
47 int nb_codes, int use_static, int is_ac)
49 uint8_t huff_size[256];
50 uint16_t huff_code[256];
51 uint16_t huff_sym[256];
54 assert(nb_codes <= 256);
56 memset(huff_size, 0, sizeof(huff_size));
57 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
60 huff_sym[i]= i + 16*is_ac;
62 if(is_ac) huff_sym[0]= 16*256;
64 return init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2, huff_sym, 2, 2, use_static);
67 static void build_basic_mjpeg_vlc(MJpegDecodeContext * s) {
68 build_vlc(&s->vlcs[0][0], ff_mjpeg_bits_dc_luminance,
69 ff_mjpeg_val_dc, 12, 0, 0);
70 build_vlc(&s->vlcs[0][1], ff_mjpeg_bits_dc_chrominance,
71 ff_mjpeg_val_dc, 12, 0, 0);
72 build_vlc(&s->vlcs[1][0], ff_mjpeg_bits_ac_luminance,
73 ff_mjpeg_val_ac_luminance, 251, 0, 1);
74 build_vlc(&s->vlcs[1][1], ff_mjpeg_bits_ac_chrominance,
75 ff_mjpeg_val_ac_chrominance, 251, 0, 1);
76 build_vlc(&s->vlcs[2][0], ff_mjpeg_bits_ac_luminance,
77 ff_mjpeg_val_ac_luminance, 251, 0, 0);
78 build_vlc(&s->vlcs[2][1], ff_mjpeg_bits_ac_chrominance,
79 ff_mjpeg_val_ac_chrominance, 251, 0, 0);
82 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
84 MJpegDecodeContext *s = avctx->priv_data;
87 s->picture_ptr = &s->picture;
88 avcodec_get_frame_defaults(&s->picture);
91 dsputil_init(&s->dsp, avctx);
92 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
97 s->org_height = avctx->coded_height;
98 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
100 build_basic_mjpeg_vlc(s);
102 #if FF_API_MJPEG_GLOBAL_OPTS
103 if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
108 av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
109 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size*8);
110 if (ff_mjpeg_decode_dht(s)) {
111 av_log(avctx, AV_LOG_ERROR, "mjpeg: error using external huffman table, switching back to internal\n");
112 build_basic_mjpeg_vlc(s);
115 if (avctx->extradata_size > 9 &&
116 AV_RL32(avctx->extradata + 4) == MKTAG('f','i','e','l')) {
117 if (avctx->extradata[9] == 6) { /* quicktime icefloe 019 */
118 s->interlace_polarity = 1; /* bottom field first */
119 av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
122 if (avctx->codec->id == CODEC_ID_AMV)
129 /* quantize tables */
130 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
132 int len, index, i, j;
134 len = get_bits(&s->gb, 16) - 2;
137 /* only 8 bit precision handled */
138 if (get_bits(&s->gb, 4) != 0)
140 av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
143 index = get_bits(&s->gb, 4);
146 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
147 /* read quant table */
149 j = s->scantable.permutated[i];
150 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
153 //XXX FIXME finetune, and perhaps add dc too
154 s->qscale[index]= FFMAX(
155 s->quant_matrixes[index][s->scantable.permutated[1]],
156 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
157 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n", index, s->qscale[index]);
164 /* decode huffman tables and build VLC decoders */
165 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
167 int len, index, i, class, n, v, code_max;
168 uint8_t bits_table[17];
169 uint8_t val_table[256];
171 len = get_bits(&s->gb, 16) - 2;
176 class = get_bits(&s->gb, 4);
179 index = get_bits(&s->gb, 4);
184 bits_table[i] = get_bits(&s->gb, 8);
188 if (len < n || n > 256)
193 v = get_bits(&s->gb, 8);
200 /* build VLC and flush previous vlc if present */
201 free_vlc(&s->vlcs[class][index]);
202 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
203 class, index, code_max + 1);
204 if(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1, 0, class > 0) < 0){
209 free_vlc(&s->vlcs[2][index]);
210 if(build_vlc(&s->vlcs[2][index], bits_table, val_table, code_max + 1, 0, 0) < 0){
218 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
220 int len, nb_components, i, width, height, pix_fmt_id;
224 /* XXX: verify len field validity */
225 len = get_bits(&s->gb, 16);
226 s->bits= get_bits(&s->gb, 8);
228 if(s->pegasus_rct) s->bits=9;
229 if(s->bits==9 && !s->pegasus_rct) s->rct=1; //FIXME ugly
231 if (s->bits != 8 && !s->lossless){
232 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
236 height = get_bits(&s->gb, 16);
237 width = get_bits(&s->gb, 16);
239 //HACK for odd_height.mov
240 if(s->interlaced && s->width == width && s->height == height + 1)
243 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
244 if(av_image_check_size(width, height, 0, s->avctx))
247 nb_components = get_bits(&s->gb, 8);
248 if (nb_components <= 0 ||
249 nb_components > MAX_COMPONENTS)
251 if (s->ls && !(s->bits <= 8 || nb_components == 1)){
252 av_log(s->avctx, AV_LOG_ERROR, "only <= 8 bits/component or 16-bit gray accepted for JPEG-LS\n");
255 s->nb_components = nb_components;
258 for(i=0;i<nb_components;i++) {
260 s->component_id[i] = get_bits(&s->gb, 8) - 1;
261 s->h_count[i] = get_bits(&s->gb, 4);
262 s->v_count[i] = get_bits(&s->gb, 4);
263 /* compute hmax and vmax (only used in interleaved case) */
264 if (s->h_count[i] > s->h_max)
265 s->h_max = s->h_count[i];
266 if (s->v_count[i] > s->v_max)
267 s->v_max = s->v_count[i];
268 s->quant_index[i] = get_bits(&s->gb, 8);
269 if (s->quant_index[i] >= 4)
271 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n", i, s->h_count[i],
272 s->v_count[i], s->component_id[i], s->quant_index[i]);
275 if(s->ls && (s->h_max > 1 || s->v_max > 1)) {
276 av_log(s->avctx, AV_LOG_ERROR, "Subsampling in JPEG-LS is not supported.\n");
280 if(s->v_max==1 && s->h_max==1 && s->lossless==1) s->rgb=1;
282 /* if different size, realloc/alloc picture */
283 /* XXX: also check h_count and v_count */
284 if (width != s->width || height != s->height) {
285 av_freep(&s->qscale_table);
291 /* test interlaced mode */
292 if (s->first_picture &&
293 s->org_height != 0 &&
294 s->height < ((s->org_height * 3) / 4)) {
296 s->bottom_field = s->interlace_polarity;
297 s->picture_ptr->interlaced_frame = 1;
298 s->picture_ptr->top_field_first = !s->interlace_polarity;
302 avcodec_set_dimensions(s->avctx, width, height);
304 s->qscale_table= av_mallocz((s->width+15)/16);
306 s->first_picture = 0;
309 if(s->interlaced && (s->bottom_field == !s->interlace_polarity))
312 /* XXX: not complete test ! */
313 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
314 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
315 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
316 (s->h_count[3] << 4) | s->v_count[3];
317 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
318 //NOTE we do not allocate pictures large enough for the possible padding of h/v_count being 4
319 if(!(pix_fmt_id & 0xD0D0D0D0))
320 pix_fmt_id-= (pix_fmt_id & 0xF0F0F0F0)>>1;
321 if(!(pix_fmt_id & 0x0D0D0D0D))
322 pix_fmt_id-= (pix_fmt_id & 0x0F0F0F0F)>>1;
327 s->avctx->pix_fmt = PIX_FMT_BGRA;
329 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
330 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
332 assert(s->nb_components==3);
335 s->avctx->pix_fmt = PIX_FMT_GRAY8;
338 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV440P : PIX_FMT_YUVJ440P;
339 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
342 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
343 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
346 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P;
347 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
350 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
354 if(s->nb_components > 1)
355 s->avctx->pix_fmt = PIX_FMT_RGB24;
356 else if(s->bits <= 8)
357 s->avctx->pix_fmt = PIX_FMT_GRAY8;
359 s->avctx->pix_fmt = PIX_FMT_GRAY16;
362 if(s->picture_ptr->data[0])
363 s->avctx->release_buffer(s->avctx, s->picture_ptr);
365 if(s->avctx->get_buffer(s->avctx, s->picture_ptr) < 0){
366 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
369 s->picture_ptr->pict_type= AV_PICTURE_TYPE_I;
370 s->picture_ptr->key_frame= 1;
374 s->linesize[i]= s->picture_ptr->linesize[i] << s->interlaced;
377 // printf("%d %d %d %d %d %d\n", s->width, s->height, s->linesize[0], s->linesize[1], s->interlaced, s->avctx->height);
379 if (len != (8+(3*nb_components)))
381 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
384 /* totally blank picture as progressive JPEG will only add details to it */
386 int bw = (width + s->h_max*8-1) / (s->h_max*8);
387 int bh = (height + s->v_max*8-1) / (s->v_max*8);
388 for(i=0; i<s->nb_components; i++) {
389 int size = bw * bh * s->h_count[i] * s->v_count[i];
390 av_freep(&s->blocks[i]);
391 av_freep(&s->last_nnz[i]);
392 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
393 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
394 s->block_stride[i] = bw * s->h_count[i];
396 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
401 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
404 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
407 av_log(s->avctx, AV_LOG_WARNING, "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n", 0, dc_index,
408 &s->vlcs[0][dc_index]);
413 return get_xbits(&s->gb, code);
418 /* decode block and dequantize */
419 static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
420 int component, int dc_index, int ac_index, int16_t *quant_matrix)
422 int code, i, j, level, val;
425 val = mjpeg_decode_dc(s, dc_index);
427 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
430 val = val * quant_matrix[0] + s->last_dc[component];
431 s->last_dc[component] = val;
435 {OPEN_READER(re, &s->gb);
437 UPDATE_CACHE(re, &s->gb);
438 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
440 i += ((unsigned)code) >> 4;
443 if(code > MIN_CACHE_BITS - 16){
444 UPDATE_CACHE(re, &s->gb);
447 int cache=GET_CACHE(re,&s->gb);
448 int sign=(~cache)>>31;
449 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
452 LAST_SKIP_BITS(re, &s->gb, code);
455 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
458 j = s->scantable.permutated[i];
459 block[j] = level * quant_matrix[j];
462 CLOSE_READER(re, &s->gb);}
467 static int decode_dc_progressive(MJpegDecodeContext *s, DCTELEM *block, int component,
468 int dc_index, int16_t *quant_matrix, int Al)
471 s->dsp.clear_block(block);
472 val = mjpeg_decode_dc(s, dc_index);
474 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
477 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
478 s->last_dc[component] = val;
483 /* decode block and dequantize - progressive JPEG version */
484 static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz,
485 int ac_index, int16_t *quant_matrix,
486 int ss, int se, int Al, int *EOBRUN)
488 int code, i, j, level, val, run;
494 {OPEN_READER(re, &s->gb);
496 UPDATE_CACHE(re, &s->gb);
497 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
499 run = ((unsigned) code) >> 4;
503 if(code > MIN_CACHE_BITS - 16){
504 UPDATE_CACHE(re, &s->gb);
507 int cache=GET_CACHE(re,&s->gb);
508 int sign=(~cache)>>31;
509 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
512 LAST_SKIP_BITS(re, &s->gb, code);
516 j = s->scantable.permutated[se];
517 block[j] = level * quant_matrix[j] << Al;
520 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
523 j = s->scantable.permutated[i];
524 block[j] = level * quant_matrix[j] << Al;
526 if(run == 0xF){// ZRL - skip 15 coefficients
529 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
535 UPDATE_CACHE(re, &s->gb);
536 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
537 LAST_SKIP_BITS(re, &s->gb, run);
544 CLOSE_READER(re, &s->gb);}
550 #define REFINE_BIT(j) {\
551 UPDATE_CACHE(re, &s->gb);\
552 sign = block[j]>>15;\
553 block[j] += SHOW_UBITS(re, &s->gb, 1) * ((quant_matrix[j]^sign)-sign) << Al;\
554 LAST_SKIP_BITS(re, &s->gb, 1);\
562 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);\
567 j = s->scantable.permutated[i];\
574 /* decode block and dequantize - progressive JPEG refinement pass */
575 static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz,
576 int ac_index, int16_t *quant_matrix,
577 int ss, int se, int Al, int *EOBRUN)
579 int code, i=ss, j, sign, val, run;
580 int last = FFMIN(se, *last_nnz);
582 OPEN_READER(re, &s->gb);
587 UPDATE_CACHE(re, &s->gb);
588 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
591 run = ((unsigned) code) >> 4;
592 UPDATE_CACHE(re, &s->gb);
593 val = SHOW_UBITS(re, &s->gb, 1);
594 LAST_SKIP_BITS(re, &s->gb, 1);
596 j = s->scantable.permutated[i];
598 block[j] = ((quant_matrix[j]^val)-val) << Al;
602 CLOSE_READER(re, &s->gb);
606 run = ((unsigned) code) >> 4;
613 UPDATE_CACHE(re, &s->gb);
614 run += SHOW_UBITS(re, &s->gb, val);
615 LAST_SKIP_BITS(re, &s->gb, val);
628 j = s->scantable.permutated[i];
632 CLOSE_READER(re, &s->gb);
639 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){
641 uint16_t (*buffer)[4];
642 int left[3], top[3], topleft[3];
643 const int linesize= s->linesize[0];
644 const int mask= (1<<s->bits)-1;
646 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size, (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
647 buffer= s->ljpeg_buffer;
650 buffer[0][i]= 1 << (s->bits + point_transform - 1);
652 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
653 const int modified_predictor= mb_y ? predictor : 1;
654 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
656 if (s->interlaced && s->bottom_field)
657 ptr += linesize >> 1;
660 top[i]= left[i]= topleft[i]= buffer[0][i];
662 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
663 if (s->restart_interval && !s->restart_count)
664 s->restart_count = s->restart_interval;
670 top[i]= buffer[mb_x][i];
672 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
675 buffer[mb_x][i]= mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
678 if (s->restart_interval && !--s->restart_count) {
679 align_get_bits(&s->gb);
680 skip_bits(&s->gb, 16); /* skip RSTn */
685 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
686 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200)>>2);
687 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
688 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
690 }else if(s->pegasus_rct){
691 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
692 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2])>>2);
693 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
694 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
697 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
698 ptr[4*mb_x+0] = buffer[mb_x][2];
699 ptr[4*mb_x+1] = buffer[mb_x][1];
700 ptr[4*mb_x+2] = buffer[mb_x][0];
707 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point_transform){
709 const int nb_components=3;
711 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
712 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
713 if (s->restart_interval && !s->restart_count)
714 s->restart_count = s->restart_interval;
716 if(mb_x==0 || mb_y==0 || s->interlaced){
717 for(i=0;i<nb_components;i++) {
719 int n, h, v, x, y, c, j, linesize;
721 c = s->comp_index[i];
726 linesize= s->linesize[c];
731 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
734 pred= 128 << point_transform;
740 pred= ptr[-linesize];
742 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
746 if (s->interlaced && s->bottom_field)
747 ptr += linesize >> 1;
748 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
757 for(i=0;i<nb_components;i++) {
759 int n, h, v, x, y, c, j, linesize;
761 c = s->comp_index[i];
766 linesize= s->linesize[c];
771 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
772 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
773 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
781 if (s->restart_interval && !--s->restart_count) {
782 align_get_bits(&s->gb);
783 skip_bits(&s->gb, 16); /* skip RSTn */
790 static av_always_inline void mjpeg_copy_block(uint8_t *dst, const uint8_t *src,
791 int linesize, int lowres)
794 case 0: copy_block8(dst, src, linesize, linesize, 8);
796 case 1: copy_block4(dst, src, linesize, linesize, 4);
798 case 2: copy_block2(dst, src, linesize, linesize, 2);
805 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah, int Al,
806 const uint8_t *mb_bitmask, const AVFrame *reference){
808 uint8_t* data[MAX_COMPONENTS];
809 const uint8_t *reference_data[MAX_COMPONENTS];
810 int linesize[MAX_COMPONENTS];
811 GetBitContext mb_bitmask_gb;
814 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width*s->mb_height);
817 if(s->flipped && s->avctx->flags & CODEC_FLAG_EMU_EDGE) {
818 av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with CODEC_FLAG_EMU_EDGE set!\n");
821 for(i=0; i < nb_components; i++) {
822 int c = s->comp_index[i];
823 data[c] = s->picture_ptr->data[c];
824 reference_data[c] = reference ? reference->data[c] : NULL;
825 linesize[c]=s->linesize[c];
826 s->coefs_finished[c] |= 1;
828 //picture should be flipped upside-down for this codec
829 int offset = (linesize[c] * (s->v_scount[i] * (8 * s->mb_height -((s->height/s->v_max)&7)) - 1 ));
831 reference_data[c] += offset;
836 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
837 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
838 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
840 if (s->restart_interval && !s->restart_count)
841 s->restart_count = s->restart_interval;
843 if(get_bits_count(&s->gb)>s->gb.size_in_bits){
844 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n", get_bits_count(&s->gb) - s->gb.size_in_bits);
847 for(i=0;i<nb_components;i++) {
849 int n, h, v, x, y, c, j;
852 c = s->comp_index[i];
858 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
859 (h * mb_x + x) * 8) >> s->avctx->lowres);
861 if(s->interlaced && s->bottom_field)
862 block_offset += linesize[c] >> 1;
863 ptr = data[c] + block_offset;
864 if(!s->progressive) {
866 mjpeg_copy_block(ptr, reference_data[c] + block_offset, linesize[c], s->avctx->lowres);
868 s->dsp.clear_block(s->block);
869 if(decode_block(s, s->block, i,
870 s->dc_index[i], s->ac_index[i],
871 s->quant_matrixes[ s->quant_index[c] ]) < 0) {
872 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
875 s->dsp.idct_put(ptr, linesize[c], s->block);
878 int block_idx = s->block_stride[c] * (v * mb_y + y) + (h * mb_x + x);
879 DCTELEM *block = s->blocks[c][block_idx];
881 block[0] += get_bits1(&s->gb) * s->quant_matrixes[ s->quant_index[c] ][0] << Al;
882 else if(decode_dc_progressive(s, block, i, s->dc_index[i], s->quant_matrixes[ s->quant_index[c] ], Al) < 0) {
883 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
887 // av_log(s->avctx, AV_LOG_DEBUG, "mb: %d %d processed\n", mb_y, mb_x);
888 //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);
896 if (s->restart_interval) --s->restart_count;
897 i= 8+((-get_bits_count(&s->gb))&7);
898 if (s->restart_interval && show_bits(&s->gb, i) == (1<<i)-1){ /* skip RSTn */
899 int pos= get_bits_count(&s->gb);
900 align_get_bits(&s->gb);
901 while(get_bits_count(&s->gb) < s->gb.size_in_bits && show_bits(&s->gb, 8) == 0xFF)
902 skip_bits(&s->gb, 8);
903 if(get_bits_count(&s->gb) < s->gb.size_in_bits && (get_bits(&s->gb, 8)&0xF8) == 0xD0){
904 for (i=0; i<nb_components; i++) /* reset dc */
905 s->last_dc[i] = 1024;
907 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
915 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss, int se, int Ah, int Al){
918 int c = s->comp_index[0];
919 uint8_t* data = s->picture.data[c];
920 int linesize = s->linesize[c];
922 int16_t *quant_matrix = s->quant_matrixes[ s->quant_index[c] ];
925 s->coefs_finished[c] |= (1LL<<(se+1))-(1LL<<ss);
926 last_scan = !~s->coefs_finished[c];
929 if(s->interlaced && s->bottom_field)
930 data += linesize >> 1;
932 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
933 uint8_t *ptr = data + (mb_y*linesize*8 >> s->avctx->lowres);
934 int block_idx = mb_y * s->block_stride[c];
935 DCTELEM (*block)[64] = &s->blocks[c][block_idx];
936 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
937 for(mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
940 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
941 quant_matrix, ss, se, Al, &EOBRUN);
943 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
944 quant_matrix, ss, se, Al, &EOBRUN);
946 av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
950 s->dsp.idct_put(ptr, linesize, *block);
951 ptr += 8 >> s->avctx->lowres;
958 int ff_mjpeg_decode_sos(MJpegDecodeContext *s,
959 const uint8_t *mb_bitmask, const AVFrame *reference)
961 int len, nb_components, i, h, v, predictor, point_transform;
963 const int block_size= s->lossless ? 1 : 8;
966 /* XXX: verify len field validity */
967 len = get_bits(&s->gb, 16);
968 nb_components = get_bits(&s->gb, 8);
969 if (nb_components == 0 || nb_components > MAX_COMPONENTS){
970 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: nb_components (%d) unsupported\n", nb_components);
973 if (len != 6+2*nb_components)
975 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
978 for(i=0;i<nb_components;i++) {
979 id = get_bits(&s->gb, 8) - 1;
980 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
981 /* find component index */
982 for(index=0;index<s->nb_components;index++)
983 if (id == s->component_id[index])
985 if (index == s->nb_components)
987 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: index(%d) out of components\n", index);
990 /* Metasoft MJPEG codec has Cb and Cr swapped */
991 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
992 && nb_components == 3 && s->nb_components == 3 && i)
995 s->comp_index[i] = index;
997 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
998 s->h_scount[i] = s->h_count[index];
999 s->v_scount[i] = s->v_count[index];
1001 s->dc_index[i] = get_bits(&s->gb, 4);
1002 s->ac_index[i] = get_bits(&s->gb, 4);
1004 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1005 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1007 if (!s->vlcs[0][s->dc_index[i]].table || !s->vlcs[1][s->ac_index[i]].table)
1011 predictor= get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1012 ilv= get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1013 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1014 prev_shift = get_bits(&s->gb, 4); /* Ah */
1015 point_transform= get_bits(&s->gb, 4); /* Al */
1017 prev_shift= point_transform= 0;
1019 for(i=0;i<nb_components;i++)
1020 s->last_dc[i] = 1024;
1022 if (nb_components > 1) {
1023 /* interleaved stream */
1024 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1025 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1026 } else if(!s->ls) { /* skip this for JPEG-LS */
1027 h = s->h_max / s->h_scount[0];
1028 v = s->v_max / s->v_scount[0];
1029 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1030 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1031 s->nb_blocks[0] = 1;
1036 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1037 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n", s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1038 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1039 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1042 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1043 for (i = s->mjpb_skiptosod; i > 0; i--)
1044 skip_bits(&s->gb, 8);
1047 av_assert0(s->picture_ptr == &s->picture);
1048 if(CONFIG_JPEGLS_DECODER && s->ls){
1050 // reset_ls_coding_parameters(s, 0);
1052 if(ff_jpegls_decode_picture(s, predictor, point_transform, ilv) < 0)
1056 if(ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)
1059 if(ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0)
1064 if(s->progressive && predictor) {
1065 av_assert0(s->picture_ptr == &s->picture);
1066 if(mjpeg_decode_scan_progressive_ac(s, predictor, ilv, prev_shift, point_transform) < 0)
1069 if(mjpeg_decode_scan(s, nb_components, prev_shift, point_transform,
1070 mb_bitmask, reference) < 0)
1077 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1081 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1083 if (get_bits(&s->gb, 16) != 4)
1085 s->restart_interval = get_bits(&s->gb, 16);
1086 s->restart_count = 0;
1087 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n", s->restart_interval);
1092 static int mjpeg_decode_app(MJpegDecodeContext *s)
1096 len = get_bits(&s->gb, 16);
1099 if(8*len + get_bits_count(&s->gb) > s->gb.size_in_bits)
1102 id = get_bits_long(&s->gb, 32);
1103 id = av_be2ne32(id);
1106 if(s->avctx->debug & FF_DEBUG_STARTCODE){
1107 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1110 /* buggy AVID, it puts EOI only at every 10th frame */
1111 /* also this fourcc is used by non-avid files too, it holds some
1112 informations, but it's always present in AVID creates files */
1113 if (id == AV_RL32("AVI1"))
1120 4bytes field_size_less_padding
1123 // if (s->first_picture)
1124 // printf("mjpeg: workarounding buggy AVID\n");
1125 i = get_bits(&s->gb, 8); len--;
1126 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1128 skip_bits(&s->gb, 8);
1129 skip_bits(&s->gb, 32);
1130 skip_bits(&s->gb, 32);
1133 // if (s->interlace_polarity)
1134 // printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
1140 if (id == AV_RL32("JFIF"))
1142 int t_w, t_h, v1, v2;
1143 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1144 v1= get_bits(&s->gb, 8);
1145 v2= get_bits(&s->gb, 8);
1146 skip_bits(&s->gb, 8);
1148 s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 16);
1149 s->avctx->sample_aspect_ratio.den= get_bits(&s->gb, 16);
1151 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1152 av_log(s->avctx, AV_LOG_INFO, "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1154 s->avctx->sample_aspect_ratio.num,
1155 s->avctx->sample_aspect_ratio.den
1158 t_w = get_bits(&s->gb, 8);
1159 t_h = get_bits(&s->gb, 8);
1162 /* skip thumbnail */
1163 if (len-10-(t_w*t_h*3) > 0)
1170 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e'))
1172 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1173 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1174 skip_bits(&s->gb, 16); /* version */
1175 skip_bits(&s->gb, 16); /* flags0 */
1176 skip_bits(&s->gb, 16); /* flags1 */
1177 skip_bits(&s->gb, 8); /* transform */
1182 if (id == AV_RL32("LJIF")){
1183 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1184 av_log(s->avctx, AV_LOG_INFO, "Pegasus lossless jpeg header found\n");
1185 skip_bits(&s->gb, 16); /* version ? */
1186 skip_bits(&s->gb, 16); /* unknwon always 0? */
1187 skip_bits(&s->gb, 16); /* unknwon always 0? */
1188 skip_bits(&s->gb, 16); /* unknwon always 0? */
1189 switch( get_bits(&s->gb, 8)){
1199 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1206 if ((s->start_code == APP1) && (len > (0x28 - 8)))
1208 id = get_bits_long(&s->gb, 32);
1209 id = av_be2ne32(id);
1211 if (id == AV_RL32("mjpg")) /* Apple MJPEG-A */
1214 skip_bits(&s->gb, 32); /* field size */
1215 skip_bits(&s->gb, 32); /* pad field size */
1216 skip_bits(&s->gb, 32); /* next off */
1217 skip_bits(&s->gb, 32); /* quant off */
1218 skip_bits(&s->gb, 32); /* huff off */
1219 skip_bits(&s->gb, 32); /* image off */
1220 skip_bits(&s->gb, 32); /* scan off */
1221 skip_bits(&s->gb, 32); /* data off */
1223 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1224 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1229 /* slow but needed for extreme adobe jpegs */
1231 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error, decode_app parser read over the end\n");
1233 skip_bits(&s->gb, 8);
1238 static int mjpeg_decode_com(MJpegDecodeContext *s)
1240 int len = get_bits(&s->gb, 16);
1241 if (len >= 2 && 8*len - 16 + get_bits_count(&s->gb) <= s->gb.size_in_bits) {
1242 char *cbuf = av_malloc(len - 1);
1245 for (i = 0; i < len - 2; i++)
1246 cbuf[i] = get_bits(&s->gb, 8);
1247 if (i > 0 && cbuf[i-1] == '\n')
1252 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1253 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1255 /* buggy avid, it puts EOI only at every 10th frame */
1256 if (!strcmp(cbuf, "AVID"))
1259 // if (s->first_picture)
1260 // printf("mjpeg: workarounding buggy AVID\n");
1262 else if(!strcmp(cbuf, "CS=ITU601")){
1265 else if((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
1266 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20))){
1277 /* return the 8 bit start code value and update the search
1278 state. Return -1 if no start code found */
1279 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1281 const uint8_t *buf_ptr;
1286 buf_ptr = *pbuf_ptr;
1287 while (buf_ptr < buf_end) {
1290 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1298 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1299 *pbuf_ptr = buf_ptr;
1303 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1304 const uint8_t **buf_ptr, const uint8_t *buf_end,
1305 const uint8_t **unescaped_buf_ptr, int *unescaped_buf_size)
1308 start_code = find_marker(buf_ptr, buf_end);
1310 if ((buf_end - *buf_ptr) > s->buffer_size)
1313 s->buffer_size = buf_end - *buf_ptr;
1314 s->buffer = av_malloc(s->buffer_size + FF_INPUT_BUFFER_PADDING_SIZE);
1315 av_log(s->avctx, AV_LOG_DEBUG, "buffer too small, expanding to %d bytes\n",
1319 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1320 if (start_code == SOS && !s->ls)
1322 const uint8_t *src = *buf_ptr;
1323 uint8_t *dst = s->buffer;
1327 uint8_t x = *(src++);
1330 if (s->avctx->codec_id != CODEC_ID_THP)
1333 while (src < buf_end && x == 0xff)
1336 if (x >= 0xd0 && x <= 0xd7)
1343 *unescaped_buf_ptr = s->buffer;
1344 *unescaped_buf_size = dst - s->buffer;
1346 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1347 (buf_end - *buf_ptr) - (dst - s->buffer));
1349 else if(start_code == SOS && s->ls){
1350 const uint8_t *src = *buf_ptr;
1351 uint8_t *dst = s->buffer;
1359 while (src + t < buf_end){
1360 uint8_t x = src[t++];
1362 while((src + t < buf_end) && x == 0xff)
1372 init_put_bits(&pb, dst, t);
1374 /* unescape bitstream */
1376 uint8_t x = src[b++];
1377 put_bits(&pb, 8, x);
1380 put_bits(&pb, 7, x);
1384 flush_put_bits(&pb);
1386 *unescaped_buf_ptr = dst;
1387 *unescaped_buf_size = (bit_count + 7) >> 3;
1391 *unescaped_buf_ptr = *buf_ptr;
1392 *unescaped_buf_size = buf_end - *buf_ptr;
1398 int ff_mjpeg_decode_frame(AVCodecContext *avctx,
1399 void *data, int *data_size,
1402 const uint8_t *buf = avpkt->data;
1403 int buf_size = avpkt->size;
1404 MJpegDecodeContext *s = avctx->priv_data;
1405 const uint8_t *buf_end, *buf_ptr;
1406 const uint8_t *unescaped_buf_ptr;
1407 int unescaped_buf_size;
1409 AVFrame *picture = data;
1411 s->got_picture = 0; // picture from previous image can not be reused
1413 buf_end = buf + buf_size;
1414 while (buf_ptr < buf_end) {
1415 /* find start next marker */
1416 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1417 &unescaped_buf_ptr, &unescaped_buf_size);
1420 if (start_code < 0) {
1423 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n", start_code, buf_end - buf_ptr);
1425 init_get_bits(&s->gb, unescaped_buf_ptr, unescaped_buf_size*8);
1427 s->start_code = start_code;
1428 if(s->avctx->debug & FF_DEBUG_STARTCODE){
1429 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1432 /* process markers */
1433 if (start_code >= 0xd0 && start_code <= 0xd7) {
1434 av_log(avctx, AV_LOG_DEBUG, "restart marker: %d\n", start_code&0x0f);
1436 } else if (start_code >= APP0 && start_code <= APP15) {
1437 mjpeg_decode_app(s);
1439 } else if (start_code == COM){
1440 mjpeg_decode_com(s);
1443 switch(start_code) {
1445 s->restart_interval = 0;
1447 s->restart_count = 0;
1448 /* nothing to do on SOI */
1451 ff_mjpeg_decode_dqt(s);
1454 if(ff_mjpeg_decode_dht(s) < 0){
1455 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1464 if (ff_mjpeg_decode_sof(s) < 0)
1471 if (ff_mjpeg_decode_sof(s) < 0)
1478 if (ff_mjpeg_decode_sof(s) < 0)
1485 if (ff_mjpeg_decode_sof(s) < 0)
1489 if (!CONFIG_JPEGLS_DECODER || ff_jpegls_decode_lse(s) < 0)
1495 if (!s->got_picture) {
1496 av_log(avctx, AV_LOG_WARNING, "Found EOI before any SOF, ignoring\n");
1499 if (s->interlaced) {
1500 s->bottom_field ^= 1;
1501 /* if not bottom field, do not output image yet */
1502 if (s->bottom_field == !s->interlace_polarity)
1505 *picture = *s->picture_ptr;
1506 *data_size = sizeof(AVFrame);
1509 picture->quality= FFMAX3(s->qscale[0], s->qscale[1], s->qscale[2]);
1510 picture->qstride= 0;
1511 picture->qscale_table= s->qscale_table;
1512 memset(picture->qscale_table, picture->quality, (s->width+15)/16);
1513 if(avctx->debug & FF_DEBUG_QP)
1514 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
1515 picture->quality*= FF_QP2LAMBDA;
1520 if (!s->got_picture) {
1521 av_log(avctx, AV_LOG_WARNING, "Can not process SOS before SOF, skipping\n");
1524 if (ff_mjpeg_decode_sos(s, NULL, NULL) < 0 &&
1525 avctx->error_recognition >= FF_ER_EXPLODE)
1526 return AVERROR_INVALIDDATA;
1529 mjpeg_decode_dri(s);
1541 av_log(avctx, AV_LOG_ERROR, "mjpeg: unsupported coding type (%x)\n", start_code);
1544 // printf("mjpeg: unsupported marker (%x)\n", start_code);
1548 /* eof process start code */
1549 buf_ptr += (get_bits_count(&s->gb)+7)/8;
1550 av_log(avctx, AV_LOG_DEBUG, "marker parser used %d bytes (%d bits)\n",
1551 (get_bits_count(&s->gb)+7)/8, get_bits_count(&s->gb));
1555 if (s->got_picture) {
1556 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1559 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1562 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n", buf_end - buf_ptr);
1563 // return buf_end - buf_ptr;
1564 return buf_ptr - buf;
1567 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1569 MJpegDecodeContext *s = avctx->priv_data;
1572 if (s->picture_ptr && s->picture_ptr->data[0])
1573 avctx->release_buffer(avctx, s->picture_ptr);
1576 av_free(s->qscale_table);
1577 av_freep(&s->ljpeg_buffer);
1578 s->ljpeg_buffer_size=0;
1582 free_vlc(&s->vlcs[i][j]);
1584 for(i=0; i<MAX_COMPONENTS; i++) {
1585 av_freep(&s->blocks[i]);
1586 av_freep(&s->last_nnz[i]);
1591 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1592 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1593 static const AVOption options[] = {
1594 { "extern_huff", "Use external huffman table.", OFFSET(extern_huff), AV_OPT_TYPE_INT, { 0 }, 0, 1, VD },
1598 static const AVClass mjpegdec_class = {
1599 .class_name = "MJPEG decoder",
1600 .item_name = av_default_item_name,
1602 .version = LIBAVUTIL_VERSION_INT,
1605 AVCodec ff_mjpeg_decoder = {
1607 .type = AVMEDIA_TYPE_VIDEO,
1608 .id = CODEC_ID_MJPEG,
1609 .priv_data_size = sizeof(MJpegDecodeContext),
1610 .init = ff_mjpeg_decode_init,
1611 .close = ff_mjpeg_decode_end,
1612 .decode = ff_mjpeg_decode_frame,
1613 .capabilities = CODEC_CAP_DR1,
1615 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1616 .priv_class = &mjpegdec_class,
1619 AVCodec ff_thp_decoder = {
1621 .type = AVMEDIA_TYPE_VIDEO,
1623 .priv_data_size = sizeof(MJpegDecodeContext),
1624 .init = ff_mjpeg_decode_init,
1625 .close = ff_mjpeg_decode_end,
1626 .decode = ff_mjpeg_decode_frame,
1627 .capabilities = CODEC_CAP_DR1,
1629 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),