3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2003 Alex Beregszaszi
5 * Copyright (c) 2003-2004 Michael Niedermayer
7 * Support for external huffman table, various fixes (AVID workaround),
8 * aspecting, new decode_frame mechanism and apple mjpeg-b support
11 * This file is part of Libav.
13 * Libav is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU Lesser General Public
15 * License as published by the Free Software Foundation; either
16 * version 2.1 of the License, or (at your option) any later version.
18 * Libav is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * Lesser General Public License for more details.
23 * You should have received a copy of the GNU Lesser General Public
24 * License along with Libav; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
35 #include "libavutil/imgutils.h"
36 #include "libavutil/opt.h"
41 #include "jpegtables.h"
44 #include "jpeglsdec.h"
48 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
49 const uint8_t *val_table, int nb_codes,
50 int use_static, int is_ac)
52 uint8_t huff_size[256] = { 0 };
53 uint16_t huff_code[256];
54 uint16_t huff_sym[256];
57 assert(nb_codes <= 256);
59 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
61 for (i = 0; i < 256; i++)
62 huff_sym[i] = i + 16 * is_ac;
65 huff_sym[0] = 16 * 256;
67 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
68 huff_code, 2, 2, huff_sym, 2, 2, use_static);
71 static int build_basic_mjpeg_vlc(MJpegDecodeContext *s)
75 if ((ret = build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
76 avpriv_mjpeg_val_dc, 12, 0, 0)) < 0)
79 if ((ret = build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
80 avpriv_mjpeg_val_dc, 12, 0, 0)) < 0)
83 if ((ret = build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
84 avpriv_mjpeg_val_ac_luminance, 251, 0, 1)) < 0)
87 if ((ret = build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
88 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1)) < 0)
91 if ((ret = build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
92 avpriv_mjpeg_val_ac_luminance, 251, 0, 0)) < 0)
95 if ((ret = build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
96 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0)) < 0)
103 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
105 MJpegDecodeContext *s = avctx->priv_data;
108 if (!s->picture_ptr) {
109 s->picture = av_frame_alloc();
111 return AVERROR(ENOMEM);
112 s->picture_ptr = s->picture;
116 ff_blockdsp_init(&s->bdsp);
117 ff_hpeldsp_init(&s->hdsp, avctx->flags);
118 ff_idctdsp_init(&s->idsp, avctx);
119 ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
124 s->first_picture = 1;
125 s->org_height = avctx->coded_height;
126 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
127 avctx->colorspace = AVCOL_SPC_BT470BG;
129 if ((ret = build_basic_mjpeg_vlc(s)) < 0)
132 if (s->extern_huff) {
133 av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
134 if ((ret = init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8)) < 0)
136 if ((ret = ff_mjpeg_decode_dht(s))) {
137 av_log(avctx, AV_LOG_ERROR,
138 "mjpeg: error using external huffman table\n");
142 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
143 s->interlace_polarity = 1; /* bottom field first */
144 av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
146 if (avctx->codec->id == AV_CODEC_ID_AMV)
153 /* quantize tables */
154 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
156 int len, index, i, j;
158 len = get_bits(&s->gb, 16) - 2;
161 /* only 8-bit precision handled */
162 if (get_bits(&s->gb, 4) != 0) {
163 av_log(s->avctx, AV_LOG_ERROR, "dqt: 16-bit precision\n");
166 index = get_bits(&s->gb, 4);
169 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
170 /* read quant table */
171 for (i = 0; i < 64; i++) {
172 j = s->scantable.permutated[i];
173 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
176 // XXX FIXME fine-tune, and perhaps add dc too
177 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
178 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
179 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
180 index, s->qscale[index]);
186 /* decode huffman tables and build VLC decoders */
187 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
189 int len, index, i, class, n, v, code_max;
190 uint8_t bits_table[17];
191 uint8_t val_table[256];
194 len = get_bits(&s->gb, 16) - 2;
198 return AVERROR_INVALIDDATA;
199 class = get_bits(&s->gb, 4);
201 return AVERROR_INVALIDDATA;
202 index = get_bits(&s->gb, 4);
204 return AVERROR_INVALIDDATA;
206 for (i = 1; i <= 16; i++) {
207 bits_table[i] = get_bits(&s->gb, 8);
211 if (len < n || n > 256)
212 return AVERROR_INVALIDDATA;
215 for (i = 0; i < n; i++) {
216 v = get_bits(&s->gb, 8);
223 /* build VLC and flush previous vlc if present */
224 ff_free_vlc(&s->vlcs[class][index]);
225 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
226 class, index, code_max + 1);
227 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
228 code_max + 1, 0, class > 0)) < 0)
232 ff_free_vlc(&s->vlcs[2][index]);
233 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
234 code_max + 1, 0, 0)) < 0)
241 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
243 int h_count[MAX_COMPONENTS] = { 0 };
244 int v_count[MAX_COMPONENTS] = { 0 };
245 int len, nb_components, i, width, height, bits, pix_fmt_id, ret;
247 /* XXX: verify len field validity */
248 len = get_bits(&s->gb, 16);
249 bits = get_bits(&s->gb, 8);
253 if (bits == 9 && !s->pegasus_rct)
254 s->rct = 1; // FIXME ugly
256 if (bits != 8 && !s->lossless) {
257 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
261 height = get_bits(&s->gb, 16);
262 width = get_bits(&s->gb, 16);
264 // HACK for odd_height.mov
265 if (s->interlaced && s->width == width && s->height == height + 1)
268 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
269 if (av_image_check_size(width, height, 0, s->avctx) < 0)
270 return AVERROR_INVALIDDATA;
272 nb_components = get_bits(&s->gb, 8);
273 if (nb_components <= 0 ||
274 nb_components > MAX_COMPONENTS)
276 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
277 if (nb_components != s->nb_components) {
278 av_log(s->avctx, AV_LOG_ERROR,
279 "nb_components changing in interlaced picture\n");
280 return AVERROR_INVALIDDATA;
283 if (s->ls && !(bits <= 8 || nb_components == 1)) {
284 avpriv_report_missing_feature(s->avctx,
285 "JPEG-LS that is not <= 8 "
286 "bits/component or 16-bit gray");
287 return AVERROR_PATCHWELCOME;
289 s->nb_components = nb_components;
292 for (i = 0; i < nb_components; i++) {
294 s->component_id[i] = get_bits(&s->gb, 8) - 1;
295 h_count[i] = get_bits(&s->gb, 4);
296 v_count[i] = get_bits(&s->gb, 4);
297 /* compute hmax and vmax (only used in interleaved case) */
298 if (h_count[i] > s->h_max)
299 s->h_max = h_count[i];
300 if (v_count[i] > s->v_max)
301 s->v_max = v_count[i];
302 s->quant_index[i] = get_bits(&s->gb, 8);
303 if (s->quant_index[i] >= 4)
304 return AVERROR_INVALIDDATA;
305 if (!h_count[i] || !v_count[i]) {
306 av_log(s->avctx, AV_LOG_ERROR,
307 "Invalid sampling factor in component %d %d:%d\n",
308 i, h_count[i], v_count[i]);
309 return AVERROR_INVALIDDATA;
312 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
313 i, h_count[i], v_count[i],
314 s->component_id[i], s->quant_index[i]);
317 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
318 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
319 return AVERROR_PATCHWELCOME;
322 if (s->v_max == 1 && s->h_max == 1 && s->lossless == 1)
325 /* if different size, realloc/alloc picture */
326 if (width != s->width || height != s->height || bits != s->bits ||
327 memcmp(s->h_count, h_count, sizeof(h_count)) ||
328 memcmp(s->v_count, v_count, sizeof(v_count))) {
332 memcpy(s->h_count, h_count, sizeof(h_count));
333 memcpy(s->v_count, v_count, sizeof(v_count));
336 /* test interlaced mode */
337 if (s->first_picture &&
338 s->org_height != 0 &&
339 s->height < ((s->org_height * 3) / 4)) {
341 s->bottom_field = s->interlace_polarity;
342 s->picture_ptr->interlaced_frame = 1;
343 s->picture_ptr->top_field_first = !s->interlace_polarity;
347 ret = ff_set_dimensions(s->avctx, width, height);
351 s->first_picture = 0;
354 if (!(s->interlaced && (s->bottom_field == !s->interlace_polarity))) {
355 /* XXX: not complete test ! */
356 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
357 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
358 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
359 (s->h_count[3] << 4) | s->v_count[3];
360 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
361 /* NOTE we do not allocate pictures large enough for the possible
362 * padding of h/v_count being 4 */
363 if (!(pix_fmt_id & 0xD0D0D0D0))
364 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
365 if (!(pix_fmt_id & 0x0D0D0D0D))
366 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
368 switch (pix_fmt_id) {
371 s->avctx->pix_fmt = AV_PIX_FMT_BGRA;
373 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
374 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
376 assert(s->nb_components == 3);
379 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
382 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
383 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
386 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
387 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
390 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
391 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
394 avpriv_report_missing_feature(s->avctx, "Pixel format 0x%x", pix_fmt_id);
395 return AVERROR_PATCHWELCOME;
398 if (s->nb_components > 1)
399 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
400 else if (s->bits <= 8)
401 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
403 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
406 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
408 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
412 av_frame_unref(s->picture_ptr);
413 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0) {
414 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
417 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
418 s->picture_ptr->key_frame = 1;
421 for (i = 0; i < 3; i++)
422 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
424 ff_dlog(s->avctx, "%d %d %d %d %d %d\n",
425 s->width, s->height, s->linesize[0], s->linesize[1],
426 s->interlaced, s->avctx->height);
428 if (len != (8 + (3 * nb_components)))
429 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
432 /* totally blank picture as progressive JPEG will only add details to it */
433 if (s->progressive) {
434 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
435 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
436 for (i = 0; i < s->nb_components; i++) {
437 int size = bw * bh * s->h_count[i] * s->v_count[i];
438 av_freep(&s->blocks[i]);
439 av_freep(&s->last_nnz[i]);
440 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
441 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
442 s->block_stride[i] = bw * s->h_count[i];
444 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
449 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
452 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
454 av_log(s->avctx, AV_LOG_WARNING,
455 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
456 0, dc_index, &s->vlcs[0][dc_index]);
461 return get_xbits(&s->gb, code);
466 /* decode block and dequantize */
467 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
468 int dc_index, int ac_index, int16_t *quant_matrix)
470 int code, i, j, level, val;
473 val = mjpeg_decode_dc(s, dc_index);
475 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
476 return AVERROR_INVALIDDATA;
478 val = val * quant_matrix[0] + s->last_dc[component];
479 s->last_dc[component] = val;
483 {OPEN_READER(re, &s->gb);
485 UPDATE_CACHE(re, &s->gb);
486 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
488 i += ((unsigned)code) >> 4;
491 if (code > MIN_CACHE_BITS - 16)
492 UPDATE_CACHE(re, &s->gb);
495 int cache = GET_CACHE(re, &s->gb);
496 int sign = (~cache) >> 31;
497 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
500 LAST_SKIP_BITS(re, &s->gb, code);
503 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
504 return AVERROR_INVALIDDATA;
506 j = s->scantable.permutated[i];
507 block[j] = level * quant_matrix[j];
510 CLOSE_READER(re, &s->gb);}
515 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
516 int component, int dc_index,
517 int16_t *quant_matrix, int Al)
520 s->bdsp.clear_block(block);
521 val = mjpeg_decode_dc(s, dc_index);
523 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
524 return AVERROR_INVALIDDATA;
526 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
527 s->last_dc[component] = val;
532 /* decode block and dequantize - progressive JPEG version */
533 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
534 uint8_t *last_nnz, int ac_index,
535 int16_t *quant_matrix,
536 int ss, int se, int Al, int *EOBRUN)
538 int code, i, j, level, val, run;
546 OPEN_READER(re, &s->gb);
547 for (i = ss; ; i++) {
548 UPDATE_CACHE(re, &s->gb);
549 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
551 run = ((unsigned) code) >> 4;
555 if (code > MIN_CACHE_BITS - 16)
556 UPDATE_CACHE(re, &s->gb);
559 int cache = GET_CACHE(re, &s->gb);
560 int sign = (~cache) >> 31;
561 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
564 LAST_SKIP_BITS(re, &s->gb, code);
568 j = s->scantable.permutated[se];
569 block[j] = level * quant_matrix[j] << Al;
572 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
573 return AVERROR_INVALIDDATA;
575 j = s->scantable.permutated[i];
576 block[j] = level * quant_matrix[j] << Al;
578 if (run == 0xF) {// ZRL - skip 15 coefficients
581 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
582 return AVERROR_INVALIDDATA;
587 UPDATE_CACHE(re, &s->gb);
588 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
589 LAST_SKIP_BITS(re, &s->gb, run);
596 CLOSE_READER(re, &s->gb);
605 #define REFINE_BIT(j) { \
606 UPDATE_CACHE(re, &s->gb); \
607 sign = block[j] >> 15; \
608 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
609 ((quant_matrix[j] ^ sign) - sign) << Al; \
610 LAST_SKIP_BITS(re, &s->gb, 1); \
618 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
623 j = s->scantable.permutated[i]; \
626 else if (run-- == 0) \
630 /* decode block and dequantize - progressive JPEG refinement pass */
631 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
633 int ac_index, int16_t *quant_matrix,
634 int ss, int se, int Al, int *EOBRUN)
636 int code, i = ss, j, sign, val, run;
637 int last = FFMIN(se, *last_nnz);
639 OPEN_READER(re, &s->gb);
644 UPDATE_CACHE(re, &s->gb);
645 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
648 run = ((unsigned) code) >> 4;
649 UPDATE_CACHE(re, &s->gb);
650 val = SHOW_UBITS(re, &s->gb, 1);
651 LAST_SKIP_BITS(re, &s->gb, 1);
653 j = s->scantable.permutated[i];
655 block[j] = ((quant_matrix[j]^val) - val) << Al;
659 CLOSE_READER(re, &s->gb);
663 run = ((unsigned) code) >> 4;
670 UPDATE_CACHE(re, &s->gb);
671 run += SHOW_UBITS(re, &s->gb, val);
672 LAST_SKIP_BITS(re, &s->gb, val);
684 for (; i <= last; i++) {
685 j = s->scantable.permutated[i];
689 CLOSE_READER(re, &s->gb);
696 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor,
700 uint16_t (*buffer)[4];
701 int left[3], top[3], topleft[3];
702 const int linesize = s->linesize[0];
703 const int mask = (1 << s->bits) - 1;
705 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
706 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
707 if (!s->ljpeg_buffer)
708 return AVERROR(ENOMEM);
710 buffer = s->ljpeg_buffer;
712 for (i = 0; i < 3; i++)
713 buffer[0][i] = 1 << (s->bits + point_transform - 1);
715 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
716 const int modified_predictor = mb_y ? predictor : 1;
717 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
719 if (s->interlaced && s->bottom_field)
720 ptr += linesize >> 1;
722 for (i = 0; i < 3; i++)
723 top[i] = left[i] = topleft[i] = buffer[0][i];
725 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
726 if (s->restart_interval && !s->restart_count)
727 s->restart_count = s->restart_interval;
729 for (i = 0; i < 3; i++) {
733 top[i] = buffer[mb_x][i];
735 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
737 left[i] = buffer[mb_x][i] =
738 mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
741 if (s->restart_interval && !--s->restart_count) {
742 align_get_bits(&s->gb);
743 skip_bits(&s->gb, 16); /* skip RSTn */
748 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
749 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
750 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
751 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
753 } else if (s->pegasus_rct) {
754 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
755 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
756 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
757 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
760 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
761 ptr[4 * mb_x + 0] = buffer[mb_x][2];
762 ptr[4 * mb_x + 1] = buffer[mb_x][1];
763 ptr[4 * mb_x + 2] = buffer[mb_x][0];
770 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
771 int point_transform, int nb_components)
775 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
776 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
777 if (s->restart_interval && !s->restart_count)
778 s->restart_count = s->restart_interval;
780 if (mb_x == 0 || mb_y == 0 || s->interlaced) {
781 for (i = 0; i < nb_components; i++) {
783 int n, h, v, x, y, c, j, linesize;
785 c = s->comp_index[i];
790 linesize = s->linesize[c];
792 for (j = 0; j < n; j++) {
794 // FIXME optimize this crap
795 ptr = s->picture_ptr->data[c] +
796 (linesize * (v * mb_y + y)) +
798 if (y == 0 && mb_y == 0) {
799 if (x == 0 && mb_x == 0)
800 pred = 128 << point_transform;
804 if (x == 0 && mb_x == 0)
805 pred = ptr[-linesize];
807 PREDICT(pred, ptr[-linesize - 1],
808 ptr[-linesize], ptr[-1], predictor);
811 if (s->interlaced && s->bottom_field)
812 ptr += linesize >> 1;
813 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
822 for (i = 0; i < nb_components; i++) {
824 int n, h, v, x, y, c, j, linesize;
826 c = s->comp_index[i];
831 linesize = s->linesize[c];
833 for (j = 0; j < n; j++) {
836 // FIXME optimize this crap
837 ptr = s->picture_ptr->data[c] +
838 (linesize * (v * mb_y + y)) +
840 PREDICT(pred, ptr[-linesize - 1],
841 ptr[-linesize], ptr[-1], predictor);
842 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
850 if (s->restart_interval && !--s->restart_count) {
851 align_get_bits(&s->gb);
852 skip_bits(&s->gb, 16); /* skip RSTn */
859 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
860 int Al, const uint8_t *mb_bitmask,
861 const AVFrame *reference)
864 uint8_t *data[MAX_COMPONENTS];
865 const uint8_t *reference_data[MAX_COMPONENTS];
866 int linesize[MAX_COMPONENTS];
867 GetBitContext mb_bitmask_gb;
870 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
872 for (i = 0; i < nb_components; i++) {
873 int c = s->comp_index[i];
874 data[c] = s->picture_ptr->data[c];
875 reference_data[c] = reference ? reference->data[c] : NULL;
876 linesize[c] = s->linesize[c];
877 s->coefs_finished[c] |= 1;
880 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
881 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
882 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
884 if (s->restart_interval && !s->restart_count)
885 s->restart_count = s->restart_interval;
887 if (get_bits_left(&s->gb) < 0) {
888 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
889 -get_bits_left(&s->gb));
890 return AVERROR_INVALIDDATA;
892 for (i = 0; i < nb_components; i++) {
894 int n, h, v, x, y, c, j;
897 c = s->comp_index[i];
902 for (j = 0; j < n; j++) {
903 block_offset = ((linesize[c] * (v * mb_y + y) * 8) +
906 if (s->interlaced && s->bottom_field)
907 block_offset += linesize[c] >> 1;
908 ptr = data[c] + block_offset;
909 if (!s->progressive) {
911 s->hdsp.put_pixels_tab[1][0](ptr,
912 reference_data[c] + block_offset,
915 s->bdsp.clear_block(s->block);
916 if (decode_block(s, s->block, i,
917 s->dc_index[i], s->ac_index[i],
918 s->quant_matrixes[s->quant_index[c]]) < 0) {
919 av_log(s->avctx, AV_LOG_ERROR,
920 "error y=%d x=%d\n", mb_y, mb_x);
921 return AVERROR_INVALIDDATA;
923 s->idsp.idct_put(ptr, linesize[c], s->block);
926 int block_idx = s->block_stride[c] * (v * mb_y + y) +
928 int16_t *block = s->blocks[c][block_idx];
930 block[0] += get_bits1(&s->gb) *
931 s->quant_matrixes[s->quant_index[c]][0] << Al;
932 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
933 s->quant_matrixes[s->quant_index[c]],
935 av_log(s->avctx, AV_LOG_ERROR,
936 "error y=%d x=%d\n", mb_y, mb_x);
937 return AVERROR_INVALIDDATA;
940 ff_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
941 ff_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
942 mb_x, mb_y, x, y, c, s->bottom_field,
943 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
951 if (s->restart_interval) {
953 i = 8 + ((-get_bits_count(&s->gb)) & 7);
955 if (show_bits(&s->gb, i) == (1 << i) - 1) {
956 int pos = get_bits_count(&s->gb);
957 align_get_bits(&s->gb);
958 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
959 skip_bits(&s->gb, 8);
960 if ((get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
961 for (i = 0; i < nb_components; i++) /* reset dc */
962 s->last_dc[i] = 1024;
964 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
972 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
973 int se, int Ah, int Al,
974 const uint8_t *mb_bitmask,
975 const AVFrame *reference)
979 int c = s->comp_index[0];
980 uint8_t *data = s->picture_ptr->data[c];
981 const uint8_t *reference_data = reference ? reference->data[c] : NULL;
982 int linesize = s->linesize[c];
984 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
985 GetBitContext mb_bitmask_gb;
987 if (ss < 0 || ss >= 64 ||
988 se < ss || se >= 64 ||
990 return AVERROR_INVALIDDATA;
993 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
996 // s->coefs_finished is a bitmask for coefficients coded
997 // ss and se are parameters telling start and end coefficients
998 s->coefs_finished[c] |= (~0ULL >> (63 - (se - ss))) << ss;
999 last_scan = !~s->coefs_finished[c];
1002 if (s->interlaced && s->bottom_field) {
1003 int offset = linesize >> 1;
1005 reference_data += offset;
1008 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1009 int block_offset = mb_y * linesize * 8;
1010 uint8_t *ptr = data + block_offset;
1011 int block_idx = mb_y * s->block_stride[c];
1012 int16_t (*block)[64] = &s->blocks[c][block_idx];
1013 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1014 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1015 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1020 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1021 quant_matrix, ss, se, Al, &EOBRUN);
1023 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1024 quant_matrix, ss, se, Al, &EOBRUN);
1026 av_log(s->avctx, AV_LOG_ERROR,
1027 "error y=%d x=%d\n", mb_y, mb_x);
1028 return AVERROR_INVALIDDATA;
1034 s->hdsp.put_pixels_tab[1][0](ptr,
1035 reference_data + block_offset,
1038 s->idsp.idct_put(ptr, linesize, *block);
1047 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1048 const AVFrame *reference)
1050 int len, nb_components, i, h, v, predictor, point_transform;
1052 const int block_size = s->lossless ? 1 : 8;
1053 int ilv, prev_shift;
1055 /* XXX: verify len field validity */
1056 len = get_bits(&s->gb, 16);
1057 nb_components = get_bits(&s->gb, 8);
1058 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1059 avpriv_report_missing_feature(s->avctx,
1060 "decode_sos: nb_components (%d)",
1062 return AVERROR_PATCHWELCOME;
1064 if (len != 6 + 2 * nb_components) {
1065 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1066 return AVERROR_INVALIDDATA;
1068 for (i = 0; i < nb_components; i++) {
1069 id = get_bits(&s->gb, 8) - 1;
1070 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1071 /* find component index */
1072 for (index = 0; index < s->nb_components; index++)
1073 if (id == s->component_id[index])
1075 if (index == s->nb_components) {
1076 av_log(s->avctx, AV_LOG_ERROR,
1077 "decode_sos: index(%d) out of components\n", index);
1078 return AVERROR_INVALIDDATA;
1080 /* Metasoft MJPEG codec has Cb and Cr swapped */
1081 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1082 && nb_components == 3 && s->nb_components == 3 && i)
1085 s->comp_index[i] = index;
1087 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1088 s->h_scount[i] = s->h_count[index];
1089 s->v_scount[i] = s->v_count[index];
1091 s->dc_index[i] = get_bits(&s->gb, 4);
1092 s->ac_index[i] = get_bits(&s->gb, 4);
1094 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1095 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1097 if (!s->vlcs[0][s->dc_index[i]].table ||
1098 !s->vlcs[1][s->ac_index[i]].table)
1102 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1103 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1104 prev_shift = get_bits(&s->gb, 4); /* Ah */
1105 point_transform = get_bits(&s->gb, 4); /* Al */
1107 if (nb_components > 1) {
1108 /* interleaved stream */
1109 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1110 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1111 } else if (!s->ls) { /* skip this for JPEG-LS */
1112 h = s->h_max / s->h_scount[0];
1113 v = s->v_max / s->v_scount[0];
1114 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1115 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1116 s->nb_blocks[0] = 1;
1121 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1122 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n",
1123 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1124 predictor, point_transform, ilv, s->bits,
1125 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
1128 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1129 for (i = s->mjpb_skiptosod; i > 0; i--)
1130 skip_bits(&s->gb, 8);
1132 if (s->lossless && s->rgb && nb_components != 3) {
1133 avpriv_request_sample(s->avctx,
1134 "Lossless RGB image without 3 components");
1135 return AVERROR_PATCHWELCOME;
1139 for (i = 0; i < nb_components; i++)
1140 s->last_dc[i] = 1024;
1143 if (CONFIG_JPEGLS_DECODER && s->ls) {
1145 // reset_ls_coding_parameters(s, 0);
1147 if ((ret = ff_jpegls_decode_picture(s, predictor,
1148 point_transform, ilv)) < 0)
1152 if ((ret = ljpeg_decode_rgb_scan(s, predictor,
1153 point_transform)) < 0)
1156 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1158 nb_components)) < 0)
1163 if (s->progressive && predictor) {
1164 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1171 if ((ret = mjpeg_decode_scan(s, nb_components,
1172 prev_shift, point_transform,
1173 mb_bitmask, reference)) < 0)
1178 if (s->interlaced &&
1179 get_bits_left(&s->gb) > 32 &&
1180 show_bits(&s->gb, 8) == 0xFF) {
1181 GetBitContext bak = s->gb;
1182 align_get_bits(&bak);
1183 if (show_bits(&bak, 16) == 0xFFD1) {
1184 ff_dlog(s->avctx, "AVRn interlaced picture marker found\n");
1186 skip_bits(&s->gb, 16);
1187 s->bottom_field ^= 1;
1196 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1197 return AVERROR_INVALIDDATA;
1200 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1202 if (get_bits(&s->gb, 16) != 4)
1203 return AVERROR_INVALIDDATA;
1204 s->restart_interval = get_bits(&s->gb, 16);
1205 s->restart_count = 0;
1206 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1207 s->restart_interval);
1212 static int mjpeg_decode_app(MJpegDecodeContext *s)
1216 len = get_bits(&s->gb, 16);
1218 return AVERROR_INVALIDDATA;
1219 if (8 * len > get_bits_left(&s->gb))
1220 return AVERROR_INVALIDDATA;
1222 id = get_bits_long(&s->gb, 32);
1223 id = av_be2ne32(id);
1226 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1227 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1229 /* Buggy AVID, it puts EOI only at every 10th frame. */
1230 /* Also, this fourcc is used by non-avid files too, it holds some
1231 information, but it's always present in AVID-created files. */
1232 if (id == AV_RL32("AVI1")) {
1238 4bytes field_size_less_padding
1241 i = get_bits(&s->gb, 8);
1243 s->bottom_field = 1;
1245 s->bottom_field = 0;
1249 if (id == AV_RL32("JFIF")) {
1250 int t_w, t_h, v1, v2;
1251 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1252 v1 = get_bits(&s->gb, 8);
1253 v2 = get_bits(&s->gb, 8);
1254 skip_bits(&s->gb, 8);
1256 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1257 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1258 ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
1260 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1261 av_log(s->avctx, AV_LOG_INFO,
1262 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1264 s->avctx->sample_aspect_ratio.num,
1265 s->avctx->sample_aspect_ratio.den);
1267 t_w = get_bits(&s->gb, 8);
1268 t_h = get_bits(&s->gb, 8);
1270 /* skip thumbnail */
1271 if (len -10 - (t_w * t_h * 3) > 0)
1272 len -= t_w * t_h * 3;
1278 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1279 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1280 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1281 skip_bits(&s->gb, 16); /* version */
1282 skip_bits(&s->gb, 16); /* flags0 */
1283 skip_bits(&s->gb, 16); /* flags1 */
1284 skip_bits(&s->gb, 8); /* transform */
1289 if (id == AV_RL32("LJIF")) {
1290 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1291 av_log(s->avctx, AV_LOG_INFO,
1292 "Pegasus lossless jpeg header found\n");
1293 skip_bits(&s->gb, 16); /* version ? */
1294 skip_bits(&s->gb, 16); /* unknown always 0? */
1295 skip_bits(&s->gb, 16); /* unknown always 0? */
1296 skip_bits(&s->gb, 16); /* unknown always 0? */
1297 switch (get_bits(&s->gb, 8)) {
1307 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1314 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1315 id = get_bits_long(&s->gb, 32);
1316 id = av_be2ne32(id);
1319 if (id == AV_RL32("mjpg")) {
1320 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1321 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1326 /* slow but needed for extreme adobe jpegs */
1328 av_log(s->avctx, AV_LOG_ERROR,
1329 "mjpeg: error, decode_app parser read over the end\n");
1331 skip_bits(&s->gb, 8);
1336 static int mjpeg_decode_com(MJpegDecodeContext *s)
1338 int len = get_bits(&s->gb, 16);
1339 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1341 char *cbuf = av_malloc(len - 1);
1343 return AVERROR(ENOMEM);
1345 for (i = 0; i < len - 2; i++)
1346 cbuf[i] = get_bits(&s->gb, 8);
1347 if (i > 0 && cbuf[i - 1] == '\n')
1352 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1353 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1355 /* buggy avid, it puts EOI only at every 10th frame */
1356 if (!strcmp(cbuf, "AVID")) {
1358 } else if (!strcmp(cbuf, "CS=ITU601"))
1360 else if ((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
1361 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1370 /* return the 8 bit start code value and update the search
1371 state. Return -1 if no start code found */
1372 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1374 const uint8_t *buf_ptr;
1381 buf_ptr = *pbuf_ptr;
1382 while (buf_ptr < buf_end) {
1385 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1395 ff_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1396 *pbuf_ptr = buf_ptr;
1400 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1401 const uint8_t **buf_ptr, const uint8_t *buf_end,
1402 const uint8_t **unescaped_buf_ptr,
1403 int *unescaped_buf_size)
1406 start_code = find_marker(buf_ptr, buf_end);
1408 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1410 return AVERROR(ENOMEM);
1412 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1413 if (start_code == SOS && !s->ls) {
1414 const uint8_t *src = *buf_ptr;
1415 uint8_t *dst = s->buffer;
1417 while (src < buf_end) {
1418 uint8_t x = *(src++);
1421 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1423 while (src < buf_end && x == 0xff)
1426 if (x >= 0xd0 && x <= 0xd7)
1433 *unescaped_buf_ptr = s->buffer;
1434 *unescaped_buf_size = dst - s->buffer;
1435 memset(s->buffer + *unescaped_buf_size, 0,
1436 AV_INPUT_BUFFER_PADDING_SIZE);
1438 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1439 (buf_end - *buf_ptr) - (dst - s->buffer));
1440 } else if (start_code == SOS && s->ls) {
1441 const uint8_t *src = *buf_ptr;
1442 uint8_t *dst = s->buffer;
1450 while (src + t < buf_end) {
1451 uint8_t x = src[t++];
1453 while ((src + t < buf_end) && x == 0xff)
1462 init_put_bits(&pb, dst, t);
1464 /* unescape bitstream */
1466 uint8_t x = src[b++];
1467 put_bits(&pb, 8, x);
1470 put_bits(&pb, 7, x);
1474 flush_put_bits(&pb);
1476 *unescaped_buf_ptr = dst;
1477 *unescaped_buf_size = (bit_count + 7) >> 3;
1478 memset(s->buffer + *unescaped_buf_size, 0,
1479 AV_INPUT_BUFFER_PADDING_SIZE);
1481 *unescaped_buf_ptr = *buf_ptr;
1482 *unescaped_buf_size = buf_end - *buf_ptr;
1488 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1491 AVFrame *frame = data;
1492 const uint8_t *buf = avpkt->data;
1493 int buf_size = avpkt->size;
1494 MJpegDecodeContext *s = avctx->priv_data;
1495 const uint8_t *buf_end, *buf_ptr;
1496 const uint8_t *unescaped_buf_ptr;
1497 int unescaped_buf_size;
1501 s->got_picture = 0; // picture from previous image can not be reused
1503 buf_end = buf + buf_size;
1504 while (buf_ptr < buf_end) {
1505 /* find start next marker */
1506 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1508 &unescaped_buf_size);
1510 if (start_code < 0) {
1512 } else if (unescaped_buf_size > INT_MAX / 8) {
1513 av_log(avctx, AV_LOG_ERROR,
1514 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1515 start_code, unescaped_buf_size, buf_size);
1516 return AVERROR_INVALIDDATA;
1519 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1520 start_code, buf_end - buf_ptr);
1522 ret = init_get_bits(&s->gb, unescaped_buf_ptr,
1523 unescaped_buf_size * 8);
1527 s->start_code = start_code;
1528 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1529 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1531 /* process markers */
1532 if (start_code >= 0xd0 && start_code <= 0xd7) {
1533 av_log(avctx, AV_LOG_DEBUG,
1534 "restart marker: %d\n", start_code & 0x0f);
1536 } else if (start_code >= APP0 && start_code <= APP15) {
1537 if ((ret = mjpeg_decode_app(s)) < 0)
1540 } else if (start_code == COM) {
1541 ret = mjpeg_decode_com(s);
1546 if (!CONFIG_JPEGLS_DECODER &&
1547 (start_code == SOF48 || start_code == LSE)) {
1548 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
1549 return AVERROR(ENOSYS);
1552 switch (start_code) {
1554 s->restart_interval = 0;
1555 s->restart_count = 0;
1556 /* nothing to do on SOI */
1559 if ((ret = ff_mjpeg_decode_dqt(s)) < 0)
1563 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1564 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1573 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1580 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1587 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1594 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1598 if (!CONFIG_JPEGLS_DECODER ||
1599 (ret = ff_jpegls_decode_lse(s)) < 0)
1604 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1607 if (!s->got_picture) {
1608 av_log(avctx, AV_LOG_WARNING,
1609 "Found EOI before any SOF, ignoring\n");
1612 if (s->interlaced) {
1613 s->bottom_field ^= 1;
1614 /* if not bottom field, do not output image yet */
1615 if (s->bottom_field == !s->interlace_polarity)
1618 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
1622 for (i = 0; frame->data[i]; i++) {
1623 int h = frame->height >> ((i == 1 || i == 2) ?
1624 s->pix_desc->log2_chroma_h : 0);
1625 frame->data[i] += frame->linesize[i] * (h - 1);
1626 frame->linesize[i] *= -1;
1632 avctx->debug & FF_DEBUG_QP) {
1633 av_log(avctx, AV_LOG_DEBUG,
1634 "QP: %d\n", FFMAX3(s->qscale[0],
1641 if (!s->got_picture) {
1642 av_log(avctx, AV_LOG_WARNING,
1643 "Can not process SOS before SOF, skipping\n");
1646 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1647 (avctx->err_recognition & AV_EF_EXPLODE))
1649 /* buggy avid puts EOI every 10-20th frame */
1650 /* if restart period is over process EOI */
1651 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1655 if ((ret = mjpeg_decode_dri(s)) < 0)
1668 av_log(avctx, AV_LOG_ERROR,
1669 "mjpeg: unsupported coding type (%x)\n", start_code);
1674 /* eof process start code */
1675 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1676 av_log(avctx, AV_LOG_DEBUG,
1677 "marker parser used %d bytes (%d bits)\n",
1678 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1680 if (s->got_picture) {
1681 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1684 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1685 return AVERROR_INVALIDDATA;
1687 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n",
1689 // return buf_end - buf_ptr;
1690 return buf_ptr - buf;
1693 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1695 MJpegDecodeContext *s = avctx->priv_data;
1699 av_frame_free(&s->picture);
1700 s->picture_ptr = NULL;
1701 } else if (s->picture_ptr)
1702 av_frame_unref(s->picture_ptr);
1705 av_freep(&s->ljpeg_buffer);
1706 s->ljpeg_buffer_size = 0;
1708 for (i = 0; i < 3; i++) {
1709 for (j = 0; j < 4; j++)
1710 ff_free_vlc(&s->vlcs[i][j]);
1712 for (i = 0; i < MAX_COMPONENTS; i++) {
1713 av_freep(&s->blocks[i]);
1714 av_freep(&s->last_nnz[i]);
1719 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1720 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1721 static const AVOption options[] = {
1722 { "extern_huff", "Use external huffman table.",
1723 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
1727 static const AVClass mjpegdec_class = {
1728 .class_name = "MJPEG decoder",
1729 .item_name = av_default_item_name,
1731 .version = LIBAVUTIL_VERSION_INT,
1734 AVCodec ff_mjpeg_decoder = {
1736 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1737 .type = AVMEDIA_TYPE_VIDEO,
1738 .id = AV_CODEC_ID_MJPEG,
1739 .priv_data_size = sizeof(MJpegDecodeContext),
1740 .init = ff_mjpeg_decode_init,
1741 .close = ff_mjpeg_decode_end,
1742 .decode = ff_mjpeg_decode_frame,
1743 .capabilities = AV_CODEC_CAP_DR1,
1744 .priv_class = &mjpegdec_class,
1745 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
1748 AVCodec ff_thp_decoder = {
1750 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
1751 .type = AVMEDIA_TYPE_VIDEO,
1752 .id = AV_CODEC_ID_THP,
1753 .priv_data_size = sizeof(MJpegDecodeContext),
1754 .init = ff_mjpeg_decode_init,
1755 .close = ff_mjpeg_decode_end,
1756 .decode = ff_mjpeg_decode_frame,
1757 .capabilities = AV_CODEC_CAP_DR1,
1758 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,