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 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
269 i, s->h_count[i], s->v_count[i],
270 s->component_id[i], s->quant_index[i]);
273 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
274 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
275 return AVERROR_PATCHWELCOME;
278 if (s->v_max == 1 && s->h_max == 1 && s->lossless == 1)
281 /* if different size, realloc/alloc picture */
282 /* XXX: also check h_count and v_count */
283 if (width != s->width || height != s->height) {
288 /* test interlaced mode */
289 if (s->first_picture &&
290 s->org_height != 0 &&
291 s->height < ((s->org_height * 3) / 4)) {
293 s->bottom_field = s->interlace_polarity;
294 s->picture_ptr->interlaced_frame = 1;
295 s->picture_ptr->top_field_first = !s->interlace_polarity;
299 avcodec_set_dimensions(s->avctx, width, height);
301 s->first_picture = 0;
304 if (!(s->interlaced && (s->bottom_field == !s->interlace_polarity))) {
305 /* XXX: not complete test ! */
306 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
307 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
308 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
309 (s->h_count[3] << 4) | s->v_count[3];
310 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
311 /* NOTE we do not allocate pictures large enough for the possible
312 * padding of h/v_count being 4 */
313 if (!(pix_fmt_id & 0xD0D0D0D0))
314 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
315 if (!(pix_fmt_id & 0x0D0D0D0D))
316 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
318 switch (pix_fmt_id) {
321 s->avctx->pix_fmt = AV_PIX_FMT_BGRA;
323 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
324 assert(s->nb_components == 3);
327 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
330 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
333 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
336 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
339 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
340 return AVERROR_PATCHWELCOME;
343 if (s->nb_components > 1)
344 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
345 else if (s->bits <= 8)
346 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
348 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
351 av_frame_unref(s->picture_ptr);
352 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0) {
353 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
356 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
357 s->picture_ptr->key_frame = 1;
360 for (i = 0; i < 3; i++)
361 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
363 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
364 s->width, s->height, s->linesize[0], s->linesize[1],
365 s->interlaced, s->avctx->height);
367 if (len != (8 + (3 * nb_components)))
368 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
371 /* totally blank picture as progressive JPEG will only add details to it */
372 if (s->progressive) {
373 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
374 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
375 for (i = 0; i < s->nb_components; i++) {
376 int size = bw * bh * s->h_count[i] * s->v_count[i];
377 av_freep(&s->blocks[i]);
378 av_freep(&s->last_nnz[i]);
379 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
380 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
381 s->block_stride[i] = bw * s->h_count[i];
383 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
388 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
391 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
393 av_log(s->avctx, AV_LOG_WARNING,
394 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
395 0, dc_index, &s->vlcs[0][dc_index]);
400 return get_xbits(&s->gb, code);
405 /* decode block and dequantize */
406 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
407 int dc_index, int ac_index, int16_t *quant_matrix)
409 int code, i, j, level, val;
412 val = mjpeg_decode_dc(s, dc_index);
414 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
415 return AVERROR_INVALIDDATA;
417 val = val * quant_matrix[0] + s->last_dc[component];
418 s->last_dc[component] = val;
422 {OPEN_READER(re, &s->gb);
424 UPDATE_CACHE(re, &s->gb);
425 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
427 i += ((unsigned)code) >> 4;
430 if (code > MIN_CACHE_BITS - 16)
431 UPDATE_CACHE(re, &s->gb);
434 int cache = GET_CACHE(re, &s->gb);
435 int sign = (~cache) >> 31;
436 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
439 LAST_SKIP_BITS(re, &s->gb, code);
442 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
443 return AVERROR_INVALIDDATA;
445 j = s->scantable.permutated[i];
446 block[j] = level * quant_matrix[j];
449 CLOSE_READER(re, &s->gb);}
454 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
455 int component, int dc_index,
456 int16_t *quant_matrix, int Al)
459 s->dsp.clear_block(block);
460 val = mjpeg_decode_dc(s, dc_index);
462 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
463 return AVERROR_INVALIDDATA;
465 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
466 s->last_dc[component] = val;
471 /* decode block and dequantize - progressive JPEG version */
472 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
473 uint8_t *last_nnz, int ac_index,
474 int16_t *quant_matrix,
475 int ss, int se, int Al, int *EOBRUN)
477 int code, i, j, level, val, run;
485 OPEN_READER(re, &s->gb);
486 for (i = ss; ; i++) {
487 UPDATE_CACHE(re, &s->gb);
488 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
490 run = ((unsigned) code) >> 4;
494 if (code > MIN_CACHE_BITS - 16)
495 UPDATE_CACHE(re, &s->gb);
498 int cache = GET_CACHE(re, &s->gb);
499 int sign = (~cache) >> 31;
500 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
503 LAST_SKIP_BITS(re, &s->gb, code);
507 j = s->scantable.permutated[se];
508 block[j] = level * quant_matrix[j] << Al;
511 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
512 return AVERROR_INVALIDDATA;
514 j = s->scantable.permutated[i];
515 block[j] = level * quant_matrix[j] << Al;
517 if (run == 0xF) {// ZRL - skip 15 coefficients
520 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
521 return AVERROR_INVALIDDATA;
526 UPDATE_CACHE(re, &s->gb);
527 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
528 LAST_SKIP_BITS(re, &s->gb, run);
535 CLOSE_READER(re, &s->gb);
544 #define REFINE_BIT(j) { \
545 UPDATE_CACHE(re, &s->gb); \
546 sign = block[j] >> 15; \
547 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
548 ((quant_matrix[j] ^ sign) - sign) << Al; \
549 LAST_SKIP_BITS(re, &s->gb, 1); \
557 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
562 j = s->scantable.permutated[i]; \
565 else if (run-- == 0) \
569 /* decode block and dequantize - progressive JPEG refinement pass */
570 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
572 int ac_index, int16_t *quant_matrix,
573 int ss, int se, int Al, int *EOBRUN)
575 int code, i = ss, j, sign, val, run;
576 int last = FFMIN(se, *last_nnz);
578 OPEN_READER(re, &s->gb);
583 UPDATE_CACHE(re, &s->gb);
584 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
587 run = ((unsigned) code) >> 4;
588 UPDATE_CACHE(re, &s->gb);
589 val = SHOW_UBITS(re, &s->gb, 1);
590 LAST_SKIP_BITS(re, &s->gb, 1);
592 j = s->scantable.permutated[i];
594 block[j] = ((quant_matrix[j]^val) - val) << Al;
598 CLOSE_READER(re, &s->gb);
602 run = ((unsigned) code) >> 4;
609 UPDATE_CACHE(re, &s->gb);
610 run += SHOW_UBITS(re, &s->gb, val);
611 LAST_SKIP_BITS(re, &s->gb, val);
623 for (; i <= last; i++) {
624 j = s->scantable.permutated[i];
628 CLOSE_READER(re, &s->gb);
635 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor,
639 uint16_t (*buffer)[4];
640 int left[3], top[3], topleft[3];
641 const int linesize = s->linesize[0];
642 const int mask = (1 << s->bits) - 1;
644 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
645 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
646 buffer = s->ljpeg_buffer;
648 for (i = 0; i < 3; i++)
649 buffer[0][i] = 1 << (s->bits + point_transform - 1);
651 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
652 const int modified_predictor = mb_y ? predictor : 1;
653 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
655 if (s->interlaced && s->bottom_field)
656 ptr += linesize >> 1;
658 for (i = 0; i < 3; i++)
659 top[i] = left[i] = topleft[i] = buffer[0][i];
661 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
662 if (s->restart_interval && !s->restart_count)
663 s->restart_count = s->restart_interval;
665 for (i = 0; i < 3; i++) {
669 top[i] = buffer[mb_x][i];
671 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
673 left[i] = buffer[mb_x][i] =
674 mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
677 if (s->restart_interval && !--s->restart_count) {
678 align_get_bits(&s->gb);
679 skip_bits(&s->gb, 16); /* skip RSTn */
684 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
685 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
686 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
687 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
689 } else if (s->pegasus_rct) {
690 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
691 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
692 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
693 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
696 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
697 ptr[4 * mb_x + 0] = buffer[mb_x][2];
698 ptr[4 * mb_x + 1] = buffer[mb_x][1];
699 ptr[4 * mb_x + 2] = buffer[mb_x][0];
706 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
710 const int nb_components = 3;
712 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
713 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
714 if (s->restart_interval && !s->restart_count)
715 s->restart_count = s->restart_interval;
717 if (mb_x == 0 || mb_y == 0 || s->interlaced) {
718 for (i = 0; i < nb_components; i++) {
720 int n, h, v, x, y, c, j, linesize;
722 c = s->comp_index[i];
727 linesize = s->linesize[c];
729 for (j = 0; j < n; j++) {
731 // FIXME optimize this crap
732 ptr = s->picture_ptr->data[c] +
733 (linesize * (v * mb_y + y)) +
735 if (y == 0 && mb_y == 0) {
736 if (x == 0 && mb_x == 0)
737 pred = 128 << point_transform;
741 if (x == 0 && mb_x == 0)
742 pred = ptr[-linesize];
744 PREDICT(pred, ptr[-linesize - 1],
745 ptr[-linesize], ptr[-1], predictor);
748 if (s->interlaced && s->bottom_field)
749 ptr += linesize >> 1;
750 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
759 for (i = 0; i < nb_components; i++) {
761 int n, h, v, x, y, c, j, linesize;
763 c = s->comp_index[i];
768 linesize = s->linesize[c];
770 for (j = 0; j < n; j++) {
773 // FIXME optimize this crap
774 ptr = s->picture_ptr->data[c] +
775 (linesize * (v * mb_y + y)) +
777 PREDICT(pred, ptr[-linesize - 1],
778 ptr[-linesize], ptr[-1], predictor);
779 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
787 if (s->restart_interval && !--s->restart_count) {
788 align_get_bits(&s->gb);
789 skip_bits(&s->gb, 16); /* skip RSTn */
796 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
797 int Al, const uint8_t *mb_bitmask,
798 const AVFrame *reference)
801 uint8_t *data[MAX_COMPONENTS];
802 const uint8_t *reference_data[MAX_COMPONENTS];
803 int linesize[MAX_COMPONENTS];
804 GetBitContext mb_bitmask_gb;
807 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
809 if (s->flipped && s->avctx->flags & CODEC_FLAG_EMU_EDGE) {
810 av_log(s->avctx, AV_LOG_ERROR,
811 "Can not flip image with CODEC_FLAG_EMU_EDGE set!\n");
815 for (i = 0; i < nb_components; i++) {
816 int c = s->comp_index[i];
817 data[c] = s->picture_ptr->data[c];
818 reference_data[c] = reference ? reference->data[c] : NULL;
819 linesize[c] = s->linesize[c];
820 s->coefs_finished[c] |= 1;
822 // picture should be flipped upside-down for this codec
823 int offset = (linesize[c] * (s->v_scount[i] *
824 (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
826 reference_data[c] += offset;
831 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
832 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
833 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
835 if (s->restart_interval && !s->restart_count)
836 s->restart_count = s->restart_interval;
838 if (get_bits_left(&s->gb) < 0) {
839 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
840 -get_bits_left(&s->gb));
841 return AVERROR_INVALIDDATA;
843 for (i = 0; i < nb_components; i++) {
845 int n, h, v, x, y, c, j;
848 c = s->comp_index[i];
853 for (j = 0; j < n; j++) {
854 block_offset = ((linesize[c] * (v * mb_y + y) * 8) +
857 if (s->interlaced && s->bottom_field)
858 block_offset += linesize[c] >> 1;
859 ptr = data[c] + block_offset;
860 if (!s->progressive) {
862 s->hdsp.put_pixels_tab[1][0](ptr,
863 reference_data[c] + block_offset,
866 s->dsp.clear_block(s->block);
867 if (decode_block(s, s->block, i,
868 s->dc_index[i], s->ac_index[i],
869 s->quant_matrixes[s->quant_index[c]]) < 0) {
870 av_log(s->avctx, AV_LOG_ERROR,
871 "error y=%d x=%d\n", mb_y, mb_x);
872 return AVERROR_INVALIDDATA;
874 s->dsp.idct_put(ptr, linesize[c], s->block);
877 int block_idx = s->block_stride[c] * (v * mb_y + y) +
879 int16_t *block = s->blocks[c][block_idx];
881 block[0] += get_bits1(&s->gb) *
882 s->quant_matrixes[s->quant_index[c]][0] << Al;
883 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
884 s->quant_matrixes[s->quant_index[c]],
886 av_log(s->avctx, AV_LOG_ERROR,
887 "error y=%d x=%d\n", mb_y, mb_x);
888 return AVERROR_INVALIDDATA;
891 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
892 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
893 mb_x, mb_y, x, y, c, s->bottom_field,
894 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
902 if (s->restart_interval) {
904 i = 8 + ((-get_bits_count(&s->gb)) & 7);
906 if (show_bits(&s->gb, i) == (1 << i) - 1) {
907 int pos = get_bits_count(&s->gb);
908 align_get_bits(&s->gb);
909 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
910 skip_bits(&s->gb, 8);
911 if ((get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
912 for (i = 0; i < nb_components; i++) /* reset dc */
913 s->last_dc[i] = 1024;
915 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
923 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
924 int se, int Ah, int Al,
925 const uint8_t *mb_bitmask,
926 const AVFrame *reference)
930 int c = s->comp_index[0];
931 uint8_t *data = s->picture_ptr->data[c];
932 const uint8_t *reference_data = reference ? reference->data[c] : NULL;
933 int linesize = s->linesize[c];
935 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
936 GetBitContext mb_bitmask_gb;
939 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
942 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
943 last_scan = !~s->coefs_finished[c];
946 if (s->interlaced && s->bottom_field) {
947 int offset = linesize >> 1;
949 reference_data += offset;
952 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
953 int block_offset = mb_y * linesize * 8;
954 uint8_t *ptr = data + block_offset;
955 int block_idx = mb_y * s->block_stride[c];
956 int16_t (*block)[64] = &s->blocks[c][block_idx];
957 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
958 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
959 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
964 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
965 quant_matrix, ss, se, Al, &EOBRUN);
967 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
968 quant_matrix, ss, se, Al, &EOBRUN);
970 av_log(s->avctx, AV_LOG_ERROR,
971 "error y=%d x=%d\n", mb_y, mb_x);
972 return AVERROR_INVALIDDATA;
978 s->hdsp.put_pixels_tab[1][0](ptr,
979 reference_data + block_offset,
982 s->dsp.idct_put(ptr, linesize, *block);
991 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
992 const AVFrame *reference)
994 int len, nb_components, i, h, v, predictor, point_transform;
996 const int block_size = s->lossless ? 1 : 8;
999 /* XXX: verify len field validity */
1000 len = get_bits(&s->gb, 16);
1001 nb_components = get_bits(&s->gb, 8);
1002 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1003 av_log(s->avctx, AV_LOG_ERROR,
1004 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1005 return AVERROR_PATCHWELCOME;
1007 if (len != 6 + 2 * nb_components) {
1008 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1009 return AVERROR_INVALIDDATA;
1011 for (i = 0; i < nb_components; i++) {
1012 id = get_bits(&s->gb, 8) - 1;
1013 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1014 /* find component index */
1015 for (index = 0; index < s->nb_components; index++)
1016 if (id == s->component_id[index])
1018 if (index == s->nb_components) {
1019 av_log(s->avctx, AV_LOG_ERROR,
1020 "decode_sos: index(%d) out of components\n", index);
1021 return AVERROR_INVALIDDATA;
1023 /* Metasoft MJPEG codec has Cb and Cr swapped */
1024 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1025 && nb_components == 3 && s->nb_components == 3 && i)
1028 s->comp_index[i] = index;
1030 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1031 s->h_scount[i] = s->h_count[index];
1032 s->v_scount[i] = s->v_count[index];
1034 s->dc_index[i] = get_bits(&s->gb, 4);
1035 s->ac_index[i] = get_bits(&s->gb, 4);
1037 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1038 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1040 if (!s->vlcs[0][s->dc_index[i]].table ||
1041 !s->vlcs[1][s->ac_index[i]].table)
1045 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1046 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1047 prev_shift = get_bits(&s->gb, 4); /* Ah */
1048 point_transform = get_bits(&s->gb, 4); /* Al */
1050 if (nb_components > 1) {
1051 /* interleaved stream */
1052 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1053 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1054 } else if (!s->ls) { /* skip this for JPEG-LS */
1055 h = s->h_max / s->h_scount[0];
1056 v = s->v_max / s->v_scount[0];
1057 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1058 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1059 s->nb_blocks[0] = 1;
1064 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1065 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n",
1066 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1067 predictor, point_transform, ilv, s->bits,
1068 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
1071 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1072 for (i = s->mjpb_skiptosod; i > 0; i--)
1073 skip_bits(&s->gb, 8);
1076 for (i = 0; i < nb_components; i++)
1077 s->last_dc[i] = 1024;
1080 if (CONFIG_JPEGLS_DECODER && s->ls) {
1082 // reset_ls_coding_parameters(s, 0);
1084 if ((ret = ff_jpegls_decode_picture(s, predictor,
1085 point_transform, ilv)) < 0)
1089 if ((ret = ljpeg_decode_rgb_scan(s, predictor,
1090 point_transform)) < 0)
1093 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1094 point_transform)) < 0)
1099 if (s->progressive && predictor) {
1100 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1107 if ((ret = mjpeg_decode_scan(s, nb_components,
1108 prev_shift, point_transform,
1109 mb_bitmask, reference)) < 0)
1114 if (s->interlaced &&
1115 get_bits_left(&s->gb) > 32 &&
1116 show_bits(&s->gb, 8) == 0xFF) {
1117 GetBitContext bak = s->gb;
1118 align_get_bits(&bak);
1119 if (show_bits(&bak, 16) == 0xFFD1) {
1120 av_dlog(s->avctx, "AVRn interlaced picture marker found\n");
1122 skip_bits(&s->gb, 16);
1123 s->bottom_field ^= 1;
1132 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1133 return AVERROR_INVALIDDATA;
1136 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1138 if (get_bits(&s->gb, 16) != 4)
1139 return AVERROR_INVALIDDATA;
1140 s->restart_interval = get_bits(&s->gb, 16);
1141 s->restart_count = 0;
1142 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1143 s->restart_interval);
1148 static int mjpeg_decode_app(MJpegDecodeContext *s)
1152 len = get_bits(&s->gb, 16);
1154 return AVERROR_INVALIDDATA;
1155 if (8 * len > get_bits_left(&s->gb))
1156 return AVERROR_INVALIDDATA;
1158 id = get_bits_long(&s->gb, 32);
1159 id = av_be2ne32(id);
1162 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1163 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1165 /* Buggy AVID, it puts EOI only at every 10th frame. */
1166 /* Also, this fourcc is used by non-avid files too, it holds some
1167 information, but it's always present in AVID-created files. */
1168 if (id == AV_RL32("AVI1")) {
1174 4bytes field_size_less_padding
1177 i = get_bits(&s->gb, 8);
1179 s->bottom_field = 1;
1181 s->bottom_field = 0;
1183 skip_bits(&s->gb, 8);
1184 skip_bits(&s->gb, 32);
1185 skip_bits(&s->gb, 32);
1193 if (id == AV_RL32("JFIF")) {
1194 int t_w, t_h, v1, v2;
1195 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1196 v1 = get_bits(&s->gb, 8);
1197 v2 = get_bits(&s->gb, 8);
1198 skip_bits(&s->gb, 8);
1200 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1201 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1203 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1204 av_log(s->avctx, AV_LOG_INFO,
1205 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1207 s->avctx->sample_aspect_ratio.num,
1208 s->avctx->sample_aspect_ratio.den);
1210 t_w = get_bits(&s->gb, 8);
1211 t_h = get_bits(&s->gb, 8);
1213 /* skip thumbnail */
1214 if (len -10 - (t_w * t_h * 3) > 0)
1215 len -= t_w * t_h * 3;
1221 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1222 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1223 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1224 skip_bits(&s->gb, 16); /* version */
1225 skip_bits(&s->gb, 16); /* flags0 */
1226 skip_bits(&s->gb, 16); /* flags1 */
1227 skip_bits(&s->gb, 8); /* transform */
1232 if (id == AV_RL32("LJIF")) {
1233 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1234 av_log(s->avctx, AV_LOG_INFO,
1235 "Pegasus lossless jpeg header found\n");
1236 skip_bits(&s->gb, 16); /* version ? */
1237 skip_bits(&s->gb, 16); /* unknwon always 0? */
1238 skip_bits(&s->gb, 16); /* unknwon always 0? */
1239 skip_bits(&s->gb, 16); /* unknwon always 0? */
1240 switch (get_bits(&s->gb, 8)) {
1250 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1257 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1258 id = get_bits_long(&s->gb, 32);
1259 id = av_be2ne32(id);
1262 if (id == AV_RL32("mjpg")) {
1264 skip_bits(&s->gb, 32); /* field size */
1265 skip_bits(&s->gb, 32); /* pad field size */
1266 skip_bits(&s->gb, 32); /* next off */
1267 skip_bits(&s->gb, 32); /* quant off */
1268 skip_bits(&s->gb, 32); /* huff off */
1269 skip_bits(&s->gb, 32); /* image off */
1270 skip_bits(&s->gb, 32); /* scan off */
1271 skip_bits(&s->gb, 32); /* data off */
1273 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1274 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1279 /* slow but needed for extreme adobe jpegs */
1281 av_log(s->avctx, AV_LOG_ERROR,
1282 "mjpeg: error, decode_app parser read over the end\n");
1284 skip_bits(&s->gb, 8);
1289 static int mjpeg_decode_com(MJpegDecodeContext *s)
1291 int len = get_bits(&s->gb, 16);
1292 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1293 char *cbuf = av_malloc(len - 1);
1296 for (i = 0; i < len - 2; i++)
1297 cbuf[i] = get_bits(&s->gb, 8);
1298 if (i > 0 && cbuf[i - 1] == '\n')
1303 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1304 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1306 /* buggy avid, it puts EOI only at every 10th frame */
1307 if (!strcmp(cbuf, "AVID")) {
1309 } else if (!strcmp(cbuf, "CS=ITU601"))
1311 else if ((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
1312 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1322 /* return the 8 bit start code value and update the search
1323 state. Return -1 if no start code found */
1324 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1326 const uint8_t *buf_ptr;
1333 buf_ptr = *pbuf_ptr;
1334 while (buf_ptr < buf_end) {
1337 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1347 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1348 *pbuf_ptr = buf_ptr;
1352 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1353 const uint8_t **buf_ptr, const uint8_t *buf_end,
1354 const uint8_t **unescaped_buf_ptr,
1355 int *unescaped_buf_size)
1358 start_code = find_marker(buf_ptr, buf_end);
1360 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1362 return AVERROR(ENOMEM);
1364 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1365 if (start_code == SOS && !s->ls) {
1366 const uint8_t *src = *buf_ptr;
1367 uint8_t *dst = s->buffer;
1369 while (src < buf_end) {
1370 uint8_t x = *(src++);
1373 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1375 while (src < buf_end && x == 0xff)
1378 if (x >= 0xd0 && x <= 0xd7)
1385 *unescaped_buf_ptr = s->buffer;
1386 *unescaped_buf_size = dst - s->buffer;
1387 memset(s->buffer + *unescaped_buf_size, 0,
1388 FF_INPUT_BUFFER_PADDING_SIZE);
1390 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1391 (buf_end - *buf_ptr) - (dst - s->buffer));
1392 } else if (start_code == SOS && s->ls) {
1393 const uint8_t *src = *buf_ptr;
1394 uint8_t *dst = s->buffer;
1402 while (src + t < buf_end) {
1403 uint8_t x = src[t++];
1405 while ((src + t < buf_end) && x == 0xff)
1414 init_put_bits(&pb, dst, t);
1416 /* unescape bitstream */
1418 uint8_t x = src[b++];
1419 put_bits(&pb, 8, x);
1422 put_bits(&pb, 7, x);
1426 flush_put_bits(&pb);
1428 *unescaped_buf_ptr = dst;
1429 *unescaped_buf_size = (bit_count + 7) >> 3;
1430 memset(s->buffer + *unescaped_buf_size, 0,
1431 FF_INPUT_BUFFER_PADDING_SIZE);
1433 *unescaped_buf_ptr = *buf_ptr;
1434 *unescaped_buf_size = buf_end - *buf_ptr;
1440 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1443 const uint8_t *buf = avpkt->data;
1444 int buf_size = avpkt->size;
1445 MJpegDecodeContext *s = avctx->priv_data;
1446 const uint8_t *buf_end, *buf_ptr;
1447 const uint8_t *unescaped_buf_ptr;
1448 int unescaped_buf_size;
1452 s->got_picture = 0; // picture from previous image can not be reused
1454 buf_end = buf + buf_size;
1455 while (buf_ptr < buf_end) {
1456 /* find start next marker */
1457 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1459 &unescaped_buf_size);
1461 if (start_code < 0) {
1463 } else if (unescaped_buf_size > (1U<<29)) {
1464 av_log(avctx, AV_LOG_ERROR, "MJPEG packet 0x%x too big (0x%x/0x%x), corrupt data?\n",
1465 start_code, unescaped_buf_size, buf_size);
1466 return AVERROR_INVALIDDATA;
1468 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1469 start_code, buf_end - buf_ptr);
1471 init_get_bits(&s->gb, unescaped_buf_ptr, unescaped_buf_size * 8);
1473 s->start_code = start_code;
1474 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1475 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1477 /* process markers */
1478 if (start_code >= 0xd0 && start_code <= 0xd7)
1479 av_log(avctx, AV_LOG_DEBUG,
1480 "restart marker: %d\n", start_code & 0x0f);
1482 else if (start_code >= APP0 && start_code <= APP15)
1483 mjpeg_decode_app(s);
1485 else if (start_code == COM)
1486 mjpeg_decode_com(s);
1488 switch (start_code) {
1490 s->restart_interval = 0;
1491 s->restart_count = 0;
1492 /* nothing to do on SOI */
1495 ff_mjpeg_decode_dqt(s);
1498 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1499 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1508 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1515 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1522 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1529 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1533 if (!CONFIG_JPEGLS_DECODER ||
1534 (ret = ff_jpegls_decode_lse(s)) < 0)
1539 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1542 if (!s->got_picture) {
1543 av_log(avctx, AV_LOG_WARNING,
1544 "Found EOI before any SOF, ignoring\n");
1547 if (s->interlaced) {
1548 s->bottom_field ^= 1;
1549 /* if not bottom field, do not output image yet */
1550 if (s->bottom_field == !s->interlace_polarity)
1553 if ((ret = av_frame_ref(data, s->picture_ptr)) < 0)
1558 avctx->debug & FF_DEBUG_QP) {
1559 av_log(avctx, AV_LOG_DEBUG,
1560 "QP: %d\n", FFMAX3(s->qscale[0],
1567 if (!s->got_picture) {
1568 av_log(avctx, AV_LOG_WARNING,
1569 "Can not process SOS before SOF, skipping\n");
1572 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1573 (avctx->err_recognition & AV_EF_EXPLODE))
1575 /* buggy avid puts EOI every 10-20th frame */
1576 /* if restart period is over process EOI */
1577 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1581 mjpeg_decode_dri(s);
1593 av_log(avctx, AV_LOG_ERROR,
1594 "mjpeg: unsupported coding type (%x)\n", start_code);
1599 /* eof process start code */
1600 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1601 av_log(avctx, AV_LOG_DEBUG,
1602 "marker parser used %d bytes (%d bits)\n",
1603 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1606 if (s->got_picture) {
1607 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1610 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1611 return AVERROR_INVALIDDATA;
1613 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n",
1615 // return buf_end - buf_ptr;
1616 return buf_ptr - buf;
1619 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1621 MJpegDecodeContext *s = avctx->priv_data;
1625 av_frame_unref(s->picture_ptr);
1628 av_freep(&s->ljpeg_buffer);
1629 s->ljpeg_buffer_size = 0;
1631 for (i = 0; i < 3; i++) {
1632 for (j = 0; j < 4; j++)
1633 ff_free_vlc(&s->vlcs[i][j]);
1635 for (i = 0; i < MAX_COMPONENTS; i++) {
1636 av_freep(&s->blocks[i]);
1637 av_freep(&s->last_nnz[i]);
1642 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1643 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1644 static const AVOption options[] = {
1645 { "extern_huff", "Use external huffman table.",
1646 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
1650 static const AVClass mjpegdec_class = {
1651 .class_name = "MJPEG decoder",
1652 .item_name = av_default_item_name,
1654 .version = LIBAVUTIL_VERSION_INT,
1657 AVCodec ff_mjpeg_decoder = {
1659 .type = AVMEDIA_TYPE_VIDEO,
1660 .id = AV_CODEC_ID_MJPEG,
1661 .priv_data_size = sizeof(MJpegDecodeContext),
1662 .init = ff_mjpeg_decode_init,
1663 .close = ff_mjpeg_decode_end,
1664 .decode = ff_mjpeg_decode_frame,
1665 .capabilities = CODEC_CAP_DR1,
1666 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1667 .priv_class = &mjpegdec_class,
1670 AVCodec ff_thp_decoder = {
1672 .type = AVMEDIA_TYPE_VIDEO,
1673 .id = AV_CODEC_ID_THP,
1674 .priv_data_size = sizeof(MJpegDecodeContext),
1675 .init = ff_mjpeg_decode_init,
1676 .close = ff_mjpeg_decode_end,
1677 .decode = ff_mjpeg_decode_frame,
1678 .capabilities = CODEC_CAP_DR1,
1679 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),