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
36 #include "libavutil/imgutils.h"
37 #include "libavutil/opt.h"
42 #include "jpeglsdec.h"
45 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
46 const uint8_t *val_table, int nb_codes,
47 int use_static, int is_ac)
49 uint8_t huff_size[256] = { 0 };
50 uint16_t huff_code[256];
51 uint16_t huff_sym[256];
54 assert(nb_codes <= 256);
56 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
58 for (i = 0; i < 256; i++)
59 huff_sym[i] = i + 16 * is_ac;
62 huff_sym[0] = 16 * 256;
64 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
65 huff_code, 2, 2, huff_sym, 2, 2, use_static);
68 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
70 build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
71 avpriv_mjpeg_val_dc, 12, 0, 0);
72 build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
73 avpriv_mjpeg_val_dc, 12, 0, 0);
74 build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
75 avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
76 build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
77 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
78 build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
79 avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
80 build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
81 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
84 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
86 MJpegDecodeContext *s = avctx->priv_data;
89 s->picture_ptr = &s->picture;
92 ff_hpeldsp_init(&s->hdsp, avctx->flags);
93 ff_dsputil_init(&s->dsp, avctx);
94 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
99 s->org_height = avctx->coded_height;
100 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
102 build_basic_mjpeg_vlc(s);
104 if (s->extern_huff) {
106 av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
107 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
108 if ((ret = ff_mjpeg_decode_dht(s))) {
109 av_log(avctx, AV_LOG_ERROR,
110 "mjpeg: error using external huffman table\n");
114 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
115 s->interlace_polarity = 1; /* bottom field first */
116 av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
118 if (avctx->codec->id == AV_CODEC_ID_AMV)
125 /* quantize tables */
126 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
128 int len, index, i, j;
130 len = get_bits(&s->gb, 16) - 2;
133 /* only 8 bit precision handled */
134 if (get_bits(&s->gb, 4) != 0) {
135 av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
138 index = get_bits(&s->gb, 4);
141 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
142 /* read quant table */
143 for (i = 0; i < 64; i++) {
144 j = s->scantable.permutated[i];
145 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
148 // XXX FIXME finetune, and perhaps add dc too
149 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
150 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
151 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
152 index, s->qscale[index]);
158 /* decode huffman tables and build VLC decoders */
159 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
161 int len, index, i, class, n, v, code_max;
162 uint8_t bits_table[17];
163 uint8_t val_table[256];
166 len = get_bits(&s->gb, 16) - 2;
170 return AVERROR_INVALIDDATA;
171 class = get_bits(&s->gb, 4);
173 return AVERROR_INVALIDDATA;
174 index = get_bits(&s->gb, 4);
176 return AVERROR_INVALIDDATA;
178 for (i = 1; i <= 16; i++) {
179 bits_table[i] = get_bits(&s->gb, 8);
183 if (len < n || n > 256)
184 return AVERROR_INVALIDDATA;
187 for (i = 0; i < n; i++) {
188 v = get_bits(&s->gb, 8);
195 /* build VLC and flush previous vlc if present */
196 ff_free_vlc(&s->vlcs[class][index]);
197 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
198 class, index, code_max + 1);
199 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
200 code_max + 1, 0, class > 0)) < 0)
204 ff_free_vlc(&s->vlcs[2][index]);
205 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
206 code_max + 1, 0, 0)) < 0)
213 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
215 int len, nb_components, i, width, height, pix_fmt_id;
217 /* XXX: verify len field validity */
218 len = get_bits(&s->gb, 16);
219 s->bits = get_bits(&s->gb, 8);
223 if (s->bits == 9 && !s->pegasus_rct)
224 s->rct = 1; // FIXME ugly
226 if (s->bits != 8 && !s->lossless) {
227 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
231 height = get_bits(&s->gb, 16);
232 width = get_bits(&s->gb, 16);
234 // HACK for odd_height.mov
235 if (s->interlaced && s->width == width && s->height == height + 1)
238 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
239 if (av_image_check_size(width, height, 0, s->avctx))
240 return AVERROR_INVALIDDATA;
242 nb_components = get_bits(&s->gb, 8);
243 if (nb_components <= 0 ||
244 nb_components > MAX_COMPONENTS)
246 if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
247 avpriv_report_missing_feature(s->avctx,
248 "JPEG-LS that is not <= 8 "
249 "bits/component or 16-bit gray");
250 return AVERROR_PATCHWELCOME;
252 s->nb_components = nb_components;
255 for (i = 0; i < nb_components; i++) {
257 s->component_id[i] = get_bits(&s->gb, 8) - 1;
258 s->h_count[i] = get_bits(&s->gb, 4);
259 s->v_count[i] = get_bits(&s->gb, 4);
260 /* compute hmax and vmax (only used in interleaved case) */
261 if (s->h_count[i] > s->h_max)
262 s->h_max = s->h_count[i];
263 if (s->v_count[i] > s->v_max)
264 s->v_max = s->v_count[i];
265 s->quant_index[i] = get_bits(&s->gb, 8);
266 if (s->quant_index[i] >= 4)
267 return AVERROR_INVALIDDATA;
268 if (!s->h_count[i] || !s->v_count[i]) {
269 av_log(s->avctx, AV_LOG_ERROR,
270 "Invalid sampling factor in component %d %d:%d\n",
271 i, s->h_count[i], s->v_count[i]);
272 return AVERROR_INVALIDDATA;
275 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
276 i, s->h_count[i], s->v_count[i],
277 s->component_id[i], s->quant_index[i]);
280 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
281 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
282 return AVERROR_PATCHWELCOME;
285 if (s->v_max == 1 && s->h_max == 1 && s->lossless == 1)
288 /* if different size, realloc/alloc picture */
289 /* XXX: also check h_count and v_count */
290 if (width != s->width || height != s->height) {
295 /* test interlaced mode */
296 if (s->first_picture &&
297 s->org_height != 0 &&
298 s->height < ((s->org_height * 3) / 4)) {
300 s->bottom_field = s->interlace_polarity;
301 s->picture_ptr->interlaced_frame = 1;
302 s->picture_ptr->top_field_first = !s->interlace_polarity;
306 avcodec_set_dimensions(s->avctx, width, height);
308 s->first_picture = 0;
311 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
319 * padding of h/v_count being 4 */
320 if (!(pix_fmt_id & 0xD0D0D0D0))
321 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
322 if (!(pix_fmt_id & 0x0D0D0D0D))
323 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
325 switch (pix_fmt_id) {
328 s->avctx->pix_fmt = AV_PIX_FMT_BGRA;
330 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
331 assert(s->nb_components == 3);
334 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
337 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
340 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
343 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
346 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
347 return AVERROR_PATCHWELCOME;
350 if (s->nb_components > 1)
351 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
352 else if (s->bits <= 8)
353 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
355 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
358 av_frame_unref(s->picture_ptr);
359 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0) {
360 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
363 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
364 s->picture_ptr->key_frame = 1;
367 for (i = 0; i < 3; i++)
368 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
370 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
371 s->width, s->height, s->linesize[0], s->linesize[1],
372 s->interlaced, s->avctx->height);
374 if (len != (8 + (3 * nb_components)))
375 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
378 /* totally blank picture as progressive JPEG will only add details to it */
379 if (s->progressive) {
380 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
381 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
382 for (i = 0; i < s->nb_components; i++) {
383 int size = bw * bh * s->h_count[i] * s->v_count[i];
384 av_freep(&s->blocks[i]);
385 av_freep(&s->last_nnz[i]);
386 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
387 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
388 s->block_stride[i] = bw * s->h_count[i];
390 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
395 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
398 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
400 av_log(s->avctx, AV_LOG_WARNING,
401 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
402 0, dc_index, &s->vlcs[0][dc_index]);
407 return get_xbits(&s->gb, code);
412 /* decode block and dequantize */
413 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
414 int dc_index, int ac_index, int16_t *quant_matrix)
416 int code, i, j, level, val;
419 val = mjpeg_decode_dc(s, dc_index);
421 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
422 return AVERROR_INVALIDDATA;
424 val = val * quant_matrix[0] + s->last_dc[component];
425 s->last_dc[component] = val;
429 {OPEN_READER(re, &s->gb);
431 UPDATE_CACHE(re, &s->gb);
432 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
434 i += ((unsigned)code) >> 4;
437 if (code > MIN_CACHE_BITS - 16)
438 UPDATE_CACHE(re, &s->gb);
441 int cache = GET_CACHE(re, &s->gb);
442 int sign = (~cache) >> 31;
443 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
446 LAST_SKIP_BITS(re, &s->gb, code);
449 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
450 return AVERROR_INVALIDDATA;
452 j = s->scantable.permutated[i];
453 block[j] = level * quant_matrix[j];
456 CLOSE_READER(re, &s->gb);}
461 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
462 int component, int dc_index,
463 int16_t *quant_matrix, int Al)
466 s->dsp.clear_block(block);
467 val = mjpeg_decode_dc(s, dc_index);
469 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
470 return AVERROR_INVALIDDATA;
472 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
473 s->last_dc[component] = val;
478 /* decode block and dequantize - progressive JPEG version */
479 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
480 uint8_t *last_nnz, int ac_index,
481 int16_t *quant_matrix,
482 int ss, int se, int Al, int *EOBRUN)
484 int code, i, j, level, val, run;
492 OPEN_READER(re, &s->gb);
493 for (i = ss; ; i++) {
494 UPDATE_CACHE(re, &s->gb);
495 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
497 run = ((unsigned) code) >> 4;
501 if (code > MIN_CACHE_BITS - 16)
502 UPDATE_CACHE(re, &s->gb);
505 int cache = GET_CACHE(re, &s->gb);
506 int sign = (~cache) >> 31;
507 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
510 LAST_SKIP_BITS(re, &s->gb, code);
514 j = s->scantable.permutated[se];
515 block[j] = level * quant_matrix[j] << Al;
518 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
519 return AVERROR_INVALIDDATA;
521 j = s->scantable.permutated[i];
522 block[j] = level * quant_matrix[j] << Al;
524 if (run == 0xF) {// ZRL - skip 15 coefficients
527 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
528 return AVERROR_INVALIDDATA;
533 UPDATE_CACHE(re, &s->gb);
534 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
535 LAST_SKIP_BITS(re, &s->gb, run);
542 CLOSE_READER(re, &s->gb);
551 #define REFINE_BIT(j) { \
552 UPDATE_CACHE(re, &s->gb); \
553 sign = block[j] >> 15; \
554 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
555 ((quant_matrix[j] ^ sign) - sign) << Al; \
556 LAST_SKIP_BITS(re, &s->gb, 1); \
564 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
569 j = s->scantable.permutated[i]; \
572 else if (run-- == 0) \
576 /* decode block and dequantize - progressive JPEG refinement pass */
577 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
579 int ac_index, int16_t *quant_matrix,
580 int ss, int se, int Al, int *EOBRUN)
582 int code, i = ss, j, sign, val, run;
583 int last = FFMIN(se, *last_nnz);
585 OPEN_READER(re, &s->gb);
590 UPDATE_CACHE(re, &s->gb);
591 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
594 run = ((unsigned) code) >> 4;
595 UPDATE_CACHE(re, &s->gb);
596 val = SHOW_UBITS(re, &s->gb, 1);
597 LAST_SKIP_BITS(re, &s->gb, 1);
599 j = s->scantable.permutated[i];
601 block[j] = ((quant_matrix[j]^val) - val) << Al;
605 CLOSE_READER(re, &s->gb);
609 run = ((unsigned) code) >> 4;
616 UPDATE_CACHE(re, &s->gb);
617 run += SHOW_UBITS(re, &s->gb, val);
618 LAST_SKIP_BITS(re, &s->gb, val);
630 for (; i <= last; i++) {
631 j = s->scantable.permutated[i];
635 CLOSE_READER(re, &s->gb);
642 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor,
646 uint16_t (*buffer)[4];
647 int left[3], top[3], topleft[3];
648 const int linesize = s->linesize[0];
649 const int mask = (1 << s->bits) - 1;
651 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
652 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
653 buffer = s->ljpeg_buffer;
655 for (i = 0; i < 3; i++)
656 buffer[0][i] = 1 << (s->bits + point_transform - 1);
658 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
659 const int modified_predictor = mb_y ? predictor : 1;
660 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
662 if (s->interlaced && s->bottom_field)
663 ptr += linesize >> 1;
665 for (i = 0; i < 3; i++)
666 top[i] = left[i] = topleft[i] = buffer[0][i];
668 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
669 if (s->restart_interval && !s->restart_count)
670 s->restart_count = s->restart_interval;
672 for (i = 0; i < 3; i++) {
676 top[i] = buffer[mb_x][i];
678 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
680 left[i] = buffer[mb_x][i] =
681 mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
684 if (s->restart_interval && !--s->restart_count) {
685 align_get_bits(&s->gb);
686 skip_bits(&s->gb, 16); /* skip RSTn */
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] - 0x200) >> 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];
696 } else if (s->pegasus_rct) {
697 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
698 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
699 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
700 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
703 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
704 ptr[4 * mb_x + 0] = buffer[mb_x][2];
705 ptr[4 * mb_x + 1] = buffer[mb_x][1];
706 ptr[4 * mb_x + 2] = buffer[mb_x][0];
713 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
714 int point_transform, int nb_components)
718 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
719 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
720 if (s->restart_interval && !s->restart_count)
721 s->restart_count = s->restart_interval;
723 if (mb_x == 0 || mb_y == 0 || s->interlaced) {
724 for (i = 0; i < nb_components; i++) {
726 int n, h, v, x, y, c, j, linesize;
728 c = s->comp_index[i];
733 linesize = s->linesize[c];
735 for (j = 0; j < n; j++) {
737 // FIXME optimize this crap
738 ptr = s->picture_ptr->data[c] +
739 (linesize * (v * mb_y + y)) +
741 if (y == 0 && mb_y == 0) {
742 if (x == 0 && mb_x == 0)
743 pred = 128 << point_transform;
747 if (x == 0 && mb_x == 0)
748 pred = ptr[-linesize];
750 PREDICT(pred, ptr[-linesize - 1],
751 ptr[-linesize], ptr[-1], predictor);
754 if (s->interlaced && s->bottom_field)
755 ptr += linesize >> 1;
756 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
765 for (i = 0; i < nb_components; i++) {
767 int n, h, v, x, y, c, j, linesize;
769 c = s->comp_index[i];
774 linesize = s->linesize[c];
776 for (j = 0; j < n; j++) {
779 // FIXME optimize this crap
780 ptr = s->picture_ptr->data[c] +
781 (linesize * (v * mb_y + y)) +
783 PREDICT(pred, ptr[-linesize - 1],
784 ptr[-linesize], ptr[-1], predictor);
785 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
793 if (s->restart_interval && !--s->restart_count) {
794 align_get_bits(&s->gb);
795 skip_bits(&s->gb, 16); /* skip RSTn */
802 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
803 int Al, const uint8_t *mb_bitmask,
804 const AVFrame *reference)
807 uint8_t *data[MAX_COMPONENTS];
808 const uint8_t *reference_data[MAX_COMPONENTS];
809 int linesize[MAX_COMPONENTS];
810 GetBitContext mb_bitmask_gb;
813 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
815 if (s->flipped && s->avctx->flags & CODEC_FLAG_EMU_EDGE) {
816 av_log(s->avctx, AV_LOG_ERROR,
817 "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] *
830 (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
832 reference_data[c] += offset;
837 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
838 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
839 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
841 if (s->restart_interval && !s->restart_count)
842 s->restart_count = s->restart_interval;
844 if (get_bits_left(&s->gb) < 0) {
845 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
846 -get_bits_left(&s->gb));
847 return AVERROR_INVALIDDATA;
849 for (i = 0; i < nb_components; i++) {
851 int n, h, v, x, y, c, j;
854 c = s->comp_index[i];
859 for (j = 0; j < n; j++) {
860 block_offset = ((linesize[c] * (v * mb_y + y) * 8) +
863 if (s->interlaced && s->bottom_field)
864 block_offset += linesize[c] >> 1;
865 ptr = data[c] + block_offset;
866 if (!s->progressive) {
868 s->hdsp.put_pixels_tab[1][0](ptr,
869 reference_data[c] + block_offset,
872 s->dsp.clear_block(s->block);
873 if (decode_block(s, s->block, i,
874 s->dc_index[i], s->ac_index[i],
875 s->quant_matrixes[s->quant_index[c]]) < 0) {
876 av_log(s->avctx, AV_LOG_ERROR,
877 "error y=%d x=%d\n", mb_y, mb_x);
878 return AVERROR_INVALIDDATA;
880 s->dsp.idct_put(ptr, linesize[c], s->block);
883 int block_idx = s->block_stride[c] * (v * mb_y + y) +
885 int16_t *block = s->blocks[c][block_idx];
887 block[0] += get_bits1(&s->gb) *
888 s->quant_matrixes[s->quant_index[c]][0] << Al;
889 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
890 s->quant_matrixes[s->quant_index[c]],
892 av_log(s->avctx, AV_LOG_ERROR,
893 "error y=%d x=%d\n", mb_y, mb_x);
894 return AVERROR_INVALIDDATA;
897 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
898 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
899 mb_x, mb_y, x, y, c, s->bottom_field,
900 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
908 if (s->restart_interval) {
910 i = 8 + ((-get_bits_count(&s->gb)) & 7);
912 if (show_bits(&s->gb, i) == (1 << i) - 1) {
913 int pos = get_bits_count(&s->gb);
914 align_get_bits(&s->gb);
915 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
916 skip_bits(&s->gb, 8);
917 if ((get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
918 for (i = 0; i < nb_components; i++) /* reset dc */
919 s->last_dc[i] = 1024;
921 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
929 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
930 int se, int Ah, int Al,
931 const uint8_t *mb_bitmask,
932 const AVFrame *reference)
936 int c = s->comp_index[0];
937 uint8_t *data = s->picture_ptr->data[c];
938 const uint8_t *reference_data = reference ? reference->data[c] : NULL;
939 int linesize = s->linesize[c];
941 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
942 GetBitContext mb_bitmask_gb;
944 if (ss < 0 || ss >= 64 ||
945 se < ss || se >= 64 ||
947 return AVERROR_INVALIDDATA;
950 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
953 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
954 last_scan = !~s->coefs_finished[c];
957 if (s->interlaced && s->bottom_field) {
958 int offset = linesize >> 1;
960 reference_data += offset;
963 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
964 int block_offset = mb_y * linesize * 8;
965 uint8_t *ptr = data + block_offset;
966 int block_idx = mb_y * s->block_stride[c];
967 int16_t (*block)[64] = &s->blocks[c][block_idx];
968 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
969 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
970 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
975 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
976 quant_matrix, ss, se, Al, &EOBRUN);
978 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
979 quant_matrix, ss, se, Al, &EOBRUN);
981 av_log(s->avctx, AV_LOG_ERROR,
982 "error y=%d x=%d\n", mb_y, mb_x);
983 return AVERROR_INVALIDDATA;
989 s->hdsp.put_pixels_tab[1][0](ptr,
990 reference_data + block_offset,
993 s->dsp.idct_put(ptr, linesize, *block);
1002 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1003 const AVFrame *reference)
1005 int len, nb_components, i, h, v, predictor, point_transform;
1007 const int block_size = s->lossless ? 1 : 8;
1008 int ilv, prev_shift;
1010 /* XXX: verify len field validity */
1011 len = get_bits(&s->gb, 16);
1012 nb_components = get_bits(&s->gb, 8);
1013 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1014 av_log(s->avctx, AV_LOG_ERROR,
1015 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1016 return AVERROR_PATCHWELCOME;
1018 if (len != 6 + 2 * nb_components) {
1019 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1020 return AVERROR_INVALIDDATA;
1022 for (i = 0; i < nb_components; i++) {
1023 id = get_bits(&s->gb, 8) - 1;
1024 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1025 /* find component index */
1026 for (index = 0; index < s->nb_components; index++)
1027 if (id == s->component_id[index])
1029 if (index == s->nb_components) {
1030 av_log(s->avctx, AV_LOG_ERROR,
1031 "decode_sos: index(%d) out of components\n", index);
1032 return AVERROR_INVALIDDATA;
1034 /* Metasoft MJPEG codec has Cb and Cr swapped */
1035 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1036 && nb_components == 3 && s->nb_components == 3 && i)
1039 s->comp_index[i] = index;
1041 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1042 s->h_scount[i] = s->h_count[index];
1043 s->v_scount[i] = s->v_count[index];
1045 s->dc_index[i] = get_bits(&s->gb, 4);
1046 s->ac_index[i] = get_bits(&s->gb, 4);
1048 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1049 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1051 if (!s->vlcs[0][s->dc_index[i]].table ||
1052 !s->vlcs[1][s->ac_index[i]].table)
1056 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1057 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1058 prev_shift = get_bits(&s->gb, 4); /* Ah */
1059 point_transform = get_bits(&s->gb, 4); /* Al */
1061 if (nb_components > 1) {
1062 /* interleaved stream */
1063 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1064 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1065 } else if (!s->ls) { /* skip this for JPEG-LS */
1066 h = s->h_max / s->h_scount[0];
1067 v = s->v_max / s->v_scount[0];
1068 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1069 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1070 s->nb_blocks[0] = 1;
1075 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1076 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n",
1077 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1078 predictor, point_transform, ilv, s->bits,
1079 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
1082 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1083 for (i = s->mjpb_skiptosod; i > 0; i--)
1084 skip_bits(&s->gb, 8);
1087 for (i = 0; i < nb_components; i++)
1088 s->last_dc[i] = 1024;
1091 if (CONFIG_JPEGLS_DECODER && s->ls) {
1093 // reset_ls_coding_parameters(s, 0);
1095 if ((ret = ff_jpegls_decode_picture(s, predictor,
1096 point_transform, ilv)) < 0)
1100 if ((ret = ljpeg_decode_rgb_scan(s, predictor,
1101 point_transform)) < 0)
1104 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1106 nb_components)) < 0)
1111 if (s->progressive && predictor) {
1112 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1119 if ((ret = mjpeg_decode_scan(s, nb_components,
1120 prev_shift, point_transform,
1121 mb_bitmask, reference)) < 0)
1126 if (s->interlaced &&
1127 get_bits_left(&s->gb) > 32 &&
1128 show_bits(&s->gb, 8) == 0xFF) {
1129 GetBitContext bak = s->gb;
1130 align_get_bits(&bak);
1131 if (show_bits(&bak, 16) == 0xFFD1) {
1132 av_dlog(s->avctx, "AVRn interlaced picture marker found\n");
1134 skip_bits(&s->gb, 16);
1135 s->bottom_field ^= 1;
1144 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1145 return AVERROR_INVALIDDATA;
1148 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1150 if (get_bits(&s->gb, 16) != 4)
1151 return AVERROR_INVALIDDATA;
1152 s->restart_interval = get_bits(&s->gb, 16);
1153 s->restart_count = 0;
1154 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1155 s->restart_interval);
1160 static int mjpeg_decode_app(MJpegDecodeContext *s)
1164 len = get_bits(&s->gb, 16);
1166 return AVERROR_INVALIDDATA;
1167 if (8 * len > get_bits_left(&s->gb))
1168 return AVERROR_INVALIDDATA;
1170 id = get_bits_long(&s->gb, 32);
1171 id = av_be2ne32(id);
1174 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1175 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1177 /* Buggy AVID, it puts EOI only at every 10th frame. */
1178 /* Also, this fourcc is used by non-avid files too, it holds some
1179 information, but it's always present in AVID-created files. */
1180 if (id == AV_RL32("AVI1")) {
1186 4bytes field_size_less_padding
1189 i = get_bits(&s->gb, 8);
1191 s->bottom_field = 1;
1193 s->bottom_field = 0;
1195 skip_bits(&s->gb, 8);
1196 skip_bits(&s->gb, 32);
1197 skip_bits(&s->gb, 32);
1205 if (id == AV_RL32("JFIF")) {
1206 int t_w, t_h, v1, v2;
1207 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1208 v1 = get_bits(&s->gb, 8);
1209 v2 = get_bits(&s->gb, 8);
1210 skip_bits(&s->gb, 8);
1212 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1213 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1215 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1216 av_log(s->avctx, AV_LOG_INFO,
1217 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1219 s->avctx->sample_aspect_ratio.num,
1220 s->avctx->sample_aspect_ratio.den);
1222 t_w = get_bits(&s->gb, 8);
1223 t_h = get_bits(&s->gb, 8);
1225 /* skip thumbnail */
1226 if (len -10 - (t_w * t_h * 3) > 0)
1227 len -= t_w * t_h * 3;
1233 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1234 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1235 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1236 skip_bits(&s->gb, 16); /* version */
1237 skip_bits(&s->gb, 16); /* flags0 */
1238 skip_bits(&s->gb, 16); /* flags1 */
1239 skip_bits(&s->gb, 8); /* transform */
1244 if (id == AV_RL32("LJIF")) {
1245 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1246 av_log(s->avctx, AV_LOG_INFO,
1247 "Pegasus lossless jpeg header found\n");
1248 skip_bits(&s->gb, 16); /* version ? */
1249 skip_bits(&s->gb, 16); /* unknwon always 0? */
1250 skip_bits(&s->gb, 16); /* unknwon always 0? */
1251 skip_bits(&s->gb, 16); /* unknwon always 0? */
1252 switch (get_bits(&s->gb, 8)) {
1262 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1269 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1270 id = get_bits_long(&s->gb, 32);
1271 id = av_be2ne32(id);
1274 if (id == AV_RL32("mjpg")) {
1276 skip_bits(&s->gb, 32); /* field size */
1277 skip_bits(&s->gb, 32); /* pad field size */
1278 skip_bits(&s->gb, 32); /* next off */
1279 skip_bits(&s->gb, 32); /* quant off */
1280 skip_bits(&s->gb, 32); /* huff off */
1281 skip_bits(&s->gb, 32); /* image off */
1282 skip_bits(&s->gb, 32); /* scan off */
1283 skip_bits(&s->gb, 32); /* data off */
1285 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1286 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1291 /* slow but needed for extreme adobe jpegs */
1293 av_log(s->avctx, AV_LOG_ERROR,
1294 "mjpeg: error, decode_app parser read over the end\n");
1296 skip_bits(&s->gb, 8);
1301 static int mjpeg_decode_com(MJpegDecodeContext *s)
1303 int len = get_bits(&s->gb, 16);
1304 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1305 char *cbuf = av_malloc(len - 1);
1308 for (i = 0; i < len - 2; i++)
1309 cbuf[i] = get_bits(&s->gb, 8);
1310 if (i > 0 && cbuf[i - 1] == '\n')
1315 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1316 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1318 /* buggy avid, it puts EOI only at every 10th frame */
1319 if (!strcmp(cbuf, "AVID")) {
1321 } else if (!strcmp(cbuf, "CS=ITU601"))
1323 else if ((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
1324 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1334 /* return the 8 bit start code value and update the search
1335 state. Return -1 if no start code found */
1336 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1338 const uint8_t *buf_ptr;
1345 buf_ptr = *pbuf_ptr;
1346 while (buf_ptr < buf_end) {
1349 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1359 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1360 *pbuf_ptr = buf_ptr;
1364 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1365 const uint8_t **buf_ptr, const uint8_t *buf_end,
1366 const uint8_t **unescaped_buf_ptr,
1367 int *unescaped_buf_size)
1370 start_code = find_marker(buf_ptr, buf_end);
1372 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1374 return AVERROR(ENOMEM);
1376 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1377 if (start_code == SOS && !s->ls) {
1378 const uint8_t *src = *buf_ptr;
1379 uint8_t *dst = s->buffer;
1381 while (src < buf_end) {
1382 uint8_t x = *(src++);
1385 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1387 while (src < buf_end && x == 0xff)
1390 if (x >= 0xd0 && x <= 0xd7)
1397 *unescaped_buf_ptr = s->buffer;
1398 *unescaped_buf_size = dst - s->buffer;
1399 memset(s->buffer + *unescaped_buf_size, 0,
1400 FF_INPUT_BUFFER_PADDING_SIZE);
1402 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1403 (buf_end - *buf_ptr) - (dst - s->buffer));
1404 } else if (start_code == SOS && s->ls) {
1405 const uint8_t *src = *buf_ptr;
1406 uint8_t *dst = s->buffer;
1414 while (src + t < buf_end) {
1415 uint8_t x = src[t++];
1417 while ((src + t < buf_end) && x == 0xff)
1426 init_put_bits(&pb, dst, t);
1428 /* unescape bitstream */
1430 uint8_t x = src[b++];
1431 put_bits(&pb, 8, x);
1434 put_bits(&pb, 7, x);
1438 flush_put_bits(&pb);
1440 *unescaped_buf_ptr = dst;
1441 *unescaped_buf_size = (bit_count + 7) >> 3;
1442 memset(s->buffer + *unescaped_buf_size, 0,
1443 FF_INPUT_BUFFER_PADDING_SIZE);
1445 *unescaped_buf_ptr = *buf_ptr;
1446 *unescaped_buf_size = buf_end - *buf_ptr;
1452 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1455 const uint8_t *buf = avpkt->data;
1456 int buf_size = avpkt->size;
1457 MJpegDecodeContext *s = avctx->priv_data;
1458 const uint8_t *buf_end, *buf_ptr;
1459 const uint8_t *unescaped_buf_ptr;
1460 int unescaped_buf_size;
1464 s->got_picture = 0; // picture from previous image can not be reused
1466 buf_end = buf + buf_size;
1467 while (buf_ptr < buf_end) {
1468 /* find start next marker */
1469 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1471 &unescaped_buf_size);
1473 if (start_code < 0) {
1475 } else if (unescaped_buf_size > INT_MAX / 8) {
1476 av_log(avctx, AV_LOG_ERROR,
1477 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1478 start_code, unescaped_buf_size, buf_size);
1479 return AVERROR_INVALIDDATA;
1482 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1483 start_code, buf_end - buf_ptr);
1485 ret = init_get_bits(&s->gb, unescaped_buf_ptr,
1486 unescaped_buf_size * 8);
1490 s->start_code = start_code;
1491 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1492 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1494 /* process markers */
1495 if (start_code >= 0xd0 && start_code <= 0xd7)
1496 av_log(avctx, AV_LOG_DEBUG,
1497 "restart marker: %d\n", start_code & 0x0f);
1499 else if (start_code >= APP0 && start_code <= APP15)
1500 mjpeg_decode_app(s);
1502 else if (start_code == COM)
1503 mjpeg_decode_com(s);
1505 if (!CONFIG_JPEGLS_DECODER &&
1506 (start_code == SOF48 || start_code == LSE)) {
1507 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
1508 return AVERROR(ENOSYS);
1511 switch (start_code) {
1513 s->restart_interval = 0;
1514 s->restart_count = 0;
1515 /* nothing to do on SOI */
1518 ff_mjpeg_decode_dqt(s);
1521 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1522 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1531 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1538 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1545 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1552 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1556 if (!CONFIG_JPEGLS_DECODER ||
1557 (ret = ff_jpegls_decode_lse(s)) < 0)
1562 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1565 if (!s->got_picture) {
1566 av_log(avctx, AV_LOG_WARNING,
1567 "Found EOI before any SOF, ignoring\n");
1570 if (s->interlaced) {
1571 s->bottom_field ^= 1;
1572 /* if not bottom field, do not output image yet */
1573 if (s->bottom_field == !s->interlace_polarity)
1576 if ((ret = av_frame_ref(data, s->picture_ptr)) < 0)
1581 avctx->debug & FF_DEBUG_QP) {
1582 av_log(avctx, AV_LOG_DEBUG,
1583 "QP: %d\n", FFMAX3(s->qscale[0],
1590 if (!s->got_picture) {
1591 av_log(avctx, AV_LOG_WARNING,
1592 "Can not process SOS before SOF, skipping\n");
1595 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1596 (avctx->err_recognition & AV_EF_EXPLODE))
1598 /* buggy avid puts EOI every 10-20th frame */
1599 /* if restart period is over process EOI */
1600 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1604 mjpeg_decode_dri(s);
1616 av_log(avctx, AV_LOG_ERROR,
1617 "mjpeg: unsupported coding type (%x)\n", start_code);
1622 /* eof process start code */
1623 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1624 av_log(avctx, AV_LOG_DEBUG,
1625 "marker parser used %d bytes (%d bits)\n",
1626 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1628 if (s->got_picture) {
1629 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1632 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1633 return AVERROR_INVALIDDATA;
1635 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n",
1637 // return buf_end - buf_ptr;
1638 return buf_ptr - buf;
1641 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1643 MJpegDecodeContext *s = avctx->priv_data;
1647 av_frame_unref(s->picture_ptr);
1650 av_freep(&s->ljpeg_buffer);
1651 s->ljpeg_buffer_size = 0;
1653 for (i = 0; i < 3; i++) {
1654 for (j = 0; j < 4; j++)
1655 ff_free_vlc(&s->vlcs[i][j]);
1657 for (i = 0; i < MAX_COMPONENTS; i++) {
1658 av_freep(&s->blocks[i]);
1659 av_freep(&s->last_nnz[i]);
1664 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1665 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1666 static const AVOption options[] = {
1667 { "extern_huff", "Use external huffman table.",
1668 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
1672 static const AVClass mjpegdec_class = {
1673 .class_name = "MJPEG decoder",
1674 .item_name = av_default_item_name,
1676 .version = LIBAVUTIL_VERSION_INT,
1679 AVCodec ff_mjpeg_decoder = {
1681 .type = AVMEDIA_TYPE_VIDEO,
1682 .id = AV_CODEC_ID_MJPEG,
1683 .priv_data_size = sizeof(MJpegDecodeContext),
1684 .init = ff_mjpeg_decode_init,
1685 .close = ff_mjpeg_decode_end,
1686 .decode = ff_mjpeg_decode_frame,
1687 .capabilities = CODEC_CAP_DR1,
1688 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1689 .priv_class = &mjpegdec_class,
1692 AVCodec ff_thp_decoder = {
1694 .type = AVMEDIA_TYPE_VIDEO,
1695 .id = AV_CODEC_ID_THP,
1696 .priv_data_size = sizeof(MJpegDecodeContext),
1697 .init = ff_mjpeg_decode_init,
1698 .close = ff_mjpeg_decode_end,
1699 .decode = ff_mjpeg_decode_frame,
1700 .capabilities = CODEC_CAP_DR1,
1701 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),