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_dsputil_init(&s->dsp, avctx);
93 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
98 s->org_height = avctx->coded_height;
99 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
101 build_basic_mjpeg_vlc(s);
103 if (s->extern_huff) {
105 av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
106 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
107 if ((ret = ff_mjpeg_decode_dht(s))) {
108 av_log(avctx, AV_LOG_ERROR,
109 "mjpeg: error using external huffman table\n");
113 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
114 s->interlace_polarity = 1; /* bottom field first */
115 av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
117 if (avctx->codec->id == AV_CODEC_ID_AMV)
124 /* quantize tables */
125 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
127 int len, index, i, j;
129 len = get_bits(&s->gb, 16) - 2;
132 /* only 8 bit precision handled */
133 if (get_bits(&s->gb, 4) != 0) {
134 av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
137 index = get_bits(&s->gb, 4);
140 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
141 /* read quant table */
142 for (i = 0; i < 64; i++) {
143 j = s->scantable.permutated[i];
144 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
147 // XXX FIXME finetune, and perhaps add dc too
148 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
149 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
150 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
151 index, s->qscale[index]);
157 /* decode huffman tables and build VLC decoders */
158 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
160 int len, index, i, class, n, v, code_max;
161 uint8_t bits_table[17];
162 uint8_t val_table[256];
165 len = get_bits(&s->gb, 16) - 2;
169 return AVERROR_INVALIDDATA;
170 class = get_bits(&s->gb, 4);
172 return AVERROR_INVALIDDATA;
173 index = get_bits(&s->gb, 4);
175 return AVERROR_INVALIDDATA;
177 for (i = 1; i <= 16; i++) {
178 bits_table[i] = get_bits(&s->gb, 8);
182 if (len < n || n > 256)
183 return AVERROR_INVALIDDATA;
186 for (i = 0; i < n; i++) {
187 v = get_bits(&s->gb, 8);
194 /* build VLC and flush previous vlc if present */
195 ff_free_vlc(&s->vlcs[class][index]);
196 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
197 class, index, code_max + 1);
198 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
199 code_max + 1, 0, class > 0)) < 0)
203 ff_free_vlc(&s->vlcs[2][index]);
204 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
205 code_max + 1, 0, 0)) < 0)
212 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
214 int len, nb_components, i, width, height, pix_fmt_id;
216 /* XXX: verify len field validity */
217 len = get_bits(&s->gb, 16);
218 s->bits = get_bits(&s->gb, 8);
222 if (s->bits == 9 && !s->pegasus_rct)
223 s->rct = 1; // FIXME ugly
225 if (s->bits != 8 && !s->lossless) {
226 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
230 height = get_bits(&s->gb, 16);
231 width = get_bits(&s->gb, 16);
233 // HACK for odd_height.mov
234 if (s->interlaced && s->width == width && s->height == height + 1)
237 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
238 if (av_image_check_size(width, height, 0, s->avctx))
239 return AVERROR_INVALIDDATA;
241 nb_components = get_bits(&s->gb, 8);
242 if (nb_components <= 0 ||
243 nb_components > MAX_COMPONENTS)
245 if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
246 av_log_missing_feature(s->avctx,
247 "For JPEG-LS anything except <= 8 bits/component"
248 " or 16-bit gray", 0);
249 return AVERROR_PATCHWELCOME;
251 s->nb_components = nb_components;
254 for (i = 0; i < nb_components; i++) {
256 s->component_id[i] = get_bits(&s->gb, 8) - 1;
257 s->h_count[i] = get_bits(&s->gb, 4);
258 s->v_count[i] = get_bits(&s->gb, 4);
259 /* compute hmax and vmax (only used in interleaved case) */
260 if (s->h_count[i] > s->h_max)
261 s->h_max = s->h_count[i];
262 if (s->v_count[i] > s->v_max)
263 s->v_max = s->v_count[i];
264 s->quant_index[i] = get_bits(&s->gb, 8);
265 if (s->quant_index[i] >= 4)
266 return AVERROR_INVALIDDATA;
267 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
268 i, s->h_count[i], s->v_count[i],
269 s->component_id[i], s->quant_index[i]);
272 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
273 av_log_missing_feature(s->avctx, "Subsampling in JPEG-LS", 0);
274 return AVERROR_PATCHWELCOME;
277 if (s->v_max == 1 && s->h_max == 1 && s->lossless == 1)
280 /* if different size, realloc/alloc picture */
281 /* XXX: also check h_count and v_count */
282 if (width != s->width || height != s->height) {
287 /* test interlaced mode */
288 if (s->first_picture &&
289 s->org_height != 0 &&
290 s->height < ((s->org_height * 3) / 4)) {
292 s->bottom_field = s->interlace_polarity;
293 s->picture_ptr->interlaced_frame = 1;
294 s->picture_ptr->top_field_first = !s->interlace_polarity;
298 avcodec_set_dimensions(s->avctx, width, height);
300 s->first_picture = 0;
303 if (!(s->interlaced && (s->bottom_field == !s->interlace_polarity))) {
304 /* XXX: not complete test ! */
305 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
306 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
307 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
308 (s->h_count[3] << 4) | s->v_count[3];
309 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
310 /* NOTE we do not allocate pictures large enough for the possible
311 * padding of h/v_count being 4 */
312 if (!(pix_fmt_id & 0xD0D0D0D0))
313 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
314 if (!(pix_fmt_id & 0x0D0D0D0D))
315 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
317 switch (pix_fmt_id) {
320 s->avctx->pix_fmt = AV_PIX_FMT_BGRA;
322 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
323 assert(s->nb_components == 3);
326 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
329 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
332 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
335 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
338 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
339 return AVERROR_PATCHWELCOME;
342 if (s->nb_components > 1)
343 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
344 else if (s->bits <= 8)
345 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
347 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
350 av_frame_unref(s->picture_ptr);
351 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0) {
352 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
355 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
356 s->picture_ptr->key_frame = 1;
359 for (i = 0; i < 3; i++)
360 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
362 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
363 s->width, s->height, s->linesize[0], s->linesize[1],
364 s->interlaced, s->avctx->height);
366 if (len != (8 + (3 * nb_components)))
367 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
370 /* totally blank picture as progressive JPEG will only add details to it */
371 if (s->progressive) {
372 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
373 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
374 for (i = 0; i < s->nb_components; i++) {
375 int size = bw * bh * s->h_count[i] * s->v_count[i];
376 av_freep(&s->blocks[i]);
377 av_freep(&s->last_nnz[i]);
378 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
379 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
380 s->block_stride[i] = bw * s->h_count[i];
382 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
387 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
390 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
392 av_log(s->avctx, AV_LOG_WARNING,
393 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
394 0, dc_index, &s->vlcs[0][dc_index]);
399 return get_xbits(&s->gb, code);
404 /* decode block and dequantize */
405 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
406 int dc_index, int ac_index, int16_t *quant_matrix)
408 int code, i, j, level, val;
411 val = mjpeg_decode_dc(s, dc_index);
413 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
414 return AVERROR_INVALIDDATA;
416 val = val * quant_matrix[0] + s->last_dc[component];
417 s->last_dc[component] = val;
421 {OPEN_READER(re, &s->gb);
423 UPDATE_CACHE(re, &s->gb);
424 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
426 i += ((unsigned)code) >> 4;
429 if (code > MIN_CACHE_BITS - 16)
430 UPDATE_CACHE(re, &s->gb);
433 int cache = GET_CACHE(re, &s->gb);
434 int sign = (~cache) >> 31;
435 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
438 LAST_SKIP_BITS(re, &s->gb, code);
441 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
442 return AVERROR_INVALIDDATA;
444 j = s->scantable.permutated[i];
445 block[j] = level * quant_matrix[j];
448 CLOSE_READER(re, &s->gb);}
453 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
454 int component, int dc_index,
455 int16_t *quant_matrix, int Al)
458 s->dsp.clear_block(block);
459 val = mjpeg_decode_dc(s, dc_index);
461 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
462 return AVERROR_INVALIDDATA;
464 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
465 s->last_dc[component] = val;
470 /* decode block and dequantize - progressive JPEG version */
471 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
472 uint8_t *last_nnz, int ac_index,
473 int16_t *quant_matrix,
474 int ss, int se, int Al, int *EOBRUN)
476 int code, i, j, level, val, run;
484 OPEN_READER(re, &s->gb);
485 for (i = ss; ; i++) {
486 UPDATE_CACHE(re, &s->gb);
487 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
489 run = ((unsigned) code) >> 4;
493 if (code > MIN_CACHE_BITS - 16)
494 UPDATE_CACHE(re, &s->gb);
497 int cache = GET_CACHE(re, &s->gb);
498 int sign = (~cache) >> 31;
499 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
502 LAST_SKIP_BITS(re, &s->gb, code);
506 j = s->scantable.permutated[se];
507 block[j] = level * quant_matrix[j] << Al;
510 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
511 return AVERROR_INVALIDDATA;
513 j = s->scantable.permutated[i];
514 block[j] = level * quant_matrix[j] << Al;
516 if (run == 0xF) {// ZRL - skip 15 coefficients
519 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
520 return AVERROR_INVALIDDATA;
525 UPDATE_CACHE(re, &s->gb);
526 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
527 LAST_SKIP_BITS(re, &s->gb, run);
534 CLOSE_READER(re, &s->gb);
543 #define REFINE_BIT(j) { \
544 UPDATE_CACHE(re, &s->gb); \
545 sign = block[j] >> 15; \
546 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
547 ((quant_matrix[j] ^ sign) - sign) << Al; \
548 LAST_SKIP_BITS(re, &s->gb, 1); \
556 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
561 j = s->scantable.permutated[i]; \
564 else if (run-- == 0) \
568 /* decode block and dequantize - progressive JPEG refinement pass */
569 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
571 int ac_index, int16_t *quant_matrix,
572 int ss, int se, int Al, int *EOBRUN)
574 int code, i = ss, j, sign, val, run;
575 int last = FFMIN(se, *last_nnz);
577 OPEN_READER(re, &s->gb);
582 UPDATE_CACHE(re, &s->gb);
583 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
586 run = ((unsigned) code) >> 4;
587 UPDATE_CACHE(re, &s->gb);
588 val = SHOW_UBITS(re, &s->gb, 1);
589 LAST_SKIP_BITS(re, &s->gb, 1);
591 j = s->scantable.permutated[i];
593 block[j] = ((quant_matrix[j]^val) - val) << Al;
597 CLOSE_READER(re, &s->gb);
601 run = ((unsigned) code) >> 4;
608 UPDATE_CACHE(re, &s->gb);
609 run += SHOW_UBITS(re, &s->gb, val);
610 LAST_SKIP_BITS(re, &s->gb, val);
622 for (; i <= last; i++) {
623 j = s->scantable.permutated[i];
627 CLOSE_READER(re, &s->gb);
634 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor,
638 uint16_t (*buffer)[4];
639 int left[3], top[3], topleft[3];
640 const int linesize = s->linesize[0];
641 const int mask = (1 << s->bits) - 1;
643 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
644 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
645 buffer = s->ljpeg_buffer;
647 for (i = 0; i < 3; i++)
648 buffer[0][i] = 1 << (s->bits + point_transform - 1);
650 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
651 const int modified_predictor = mb_y ? predictor : 1;
652 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
654 if (s->interlaced && s->bottom_field)
655 ptr += linesize >> 1;
657 for (i = 0; i < 3; i++)
658 top[i] = left[i] = topleft[i] = buffer[0][i];
660 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
661 if (s->restart_interval && !s->restart_count)
662 s->restart_count = s->restart_interval;
664 for (i = 0; i < 3; i++) {
668 top[i] = buffer[mb_x][i];
670 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
672 left[i] = buffer[mb_x][i] =
673 mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
676 if (s->restart_interval && !--s->restart_count) {
677 align_get_bits(&s->gb);
678 skip_bits(&s->gb, 16); /* skip RSTn */
683 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
684 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
685 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
686 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
688 } else if (s->pegasus_rct) {
689 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
690 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
691 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
692 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
695 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
696 ptr[4 * mb_x + 0] = buffer[mb_x][2];
697 ptr[4 * mb_x + 1] = buffer[mb_x][1];
698 ptr[4 * mb_x + 2] = buffer[mb_x][0];
705 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
709 const int nb_components = 3;
711 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
712 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
713 if (s->restart_interval && !s->restart_count)
714 s->restart_count = s->restart_interval;
716 if (mb_x == 0 || mb_y == 0 || s->interlaced) {
717 for (i = 0; i < nb_components; i++) {
719 int n, h, v, x, y, c, j, linesize;
721 c = s->comp_index[i];
726 linesize = s->linesize[c];
728 for (j = 0; j < n; j++) {
730 // FIXME optimize this crap
731 ptr = s->picture_ptr->data[c] +
732 (linesize * (v * mb_y + y)) +
734 if (y == 0 && mb_y == 0) {
735 if (x == 0 && mb_x == 0)
736 pred = 128 << point_transform;
740 if (x == 0 && mb_x == 0)
741 pred = ptr[-linesize];
743 PREDICT(pred, ptr[-linesize - 1],
744 ptr[-linesize], ptr[-1], predictor);
747 if (s->interlaced && s->bottom_field)
748 ptr += linesize >> 1;
749 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
758 for (i = 0; i < nb_components; i++) {
760 int n, h, v, x, y, c, j, linesize;
762 c = s->comp_index[i];
767 linesize = s->linesize[c];
769 for (j = 0; j < n; j++) {
772 // FIXME optimize this crap
773 ptr = s->picture_ptr->data[c] +
774 (linesize * (v * mb_y + y)) +
776 PREDICT(pred, ptr[-linesize - 1],
777 ptr[-linesize], ptr[-1], predictor);
778 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
786 if (s->restart_interval && !--s->restart_count) {
787 align_get_bits(&s->gb);
788 skip_bits(&s->gb, 16); /* skip RSTn */
795 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
796 int Al, const uint8_t *mb_bitmask,
797 const AVFrame *reference)
800 uint8_t *data[MAX_COMPONENTS];
801 const uint8_t *reference_data[MAX_COMPONENTS];
802 int linesize[MAX_COMPONENTS];
803 GetBitContext mb_bitmask_gb;
806 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
808 if (s->flipped && s->avctx->flags & CODEC_FLAG_EMU_EDGE) {
809 av_log(s->avctx, AV_LOG_ERROR,
810 "Can not flip image with CODEC_FLAG_EMU_EDGE set!\n");
814 for (i = 0; i < nb_components; i++) {
815 int c = s->comp_index[i];
816 data[c] = s->picture_ptr->data[c];
817 reference_data[c] = reference ? reference->data[c] : NULL;
818 linesize[c] = s->linesize[c];
819 s->coefs_finished[c] |= 1;
821 // picture should be flipped upside-down for this codec
822 int offset = (linesize[c] * (s->v_scount[i] *
823 (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
825 reference_data[c] += offset;
830 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
831 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
832 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
834 if (s->restart_interval && !s->restart_count)
835 s->restart_count = s->restart_interval;
837 if (get_bits_left(&s->gb) < 0) {
838 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
839 -get_bits_left(&s->gb));
840 return AVERROR_INVALIDDATA;
842 for (i = 0; i < nb_components; i++) {
844 int n, h, v, x, y, c, j;
847 c = s->comp_index[i];
852 for (j = 0; j < n; j++) {
853 block_offset = ((linesize[c] * (v * mb_y + y) * 8) +
856 if (s->interlaced && s->bottom_field)
857 block_offset += linesize[c] >> 1;
858 ptr = data[c] + block_offset;
859 if (!s->progressive) {
861 s->dsp.put_pixels_tab[1][0](ptr,
862 reference_data[c] + block_offset,
865 s->dsp.clear_block(s->block);
866 if (decode_block(s, s->block, i,
867 s->dc_index[i], s->ac_index[i],
868 s->quant_matrixes[s->quant_index[c]]) < 0) {
869 av_log(s->avctx, AV_LOG_ERROR,
870 "error y=%d x=%d\n", mb_y, mb_x);
871 return AVERROR_INVALIDDATA;
873 s->dsp.idct_put(ptr, linesize[c], s->block);
876 int block_idx = s->block_stride[c] * (v * mb_y + y) +
878 int16_t *block = s->blocks[c][block_idx];
880 block[0] += get_bits1(&s->gb) *
881 s->quant_matrixes[s->quant_index[c]][0] << Al;
882 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
883 s->quant_matrixes[s->quant_index[c]],
885 av_log(s->avctx, AV_LOG_ERROR,
886 "error y=%d x=%d\n", mb_y, mb_x);
887 return AVERROR_INVALIDDATA;
890 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
891 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
892 mb_x, mb_y, x, y, c, s->bottom_field,
893 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
901 if (s->restart_interval) {
903 i = 8 + ((-get_bits_count(&s->gb)) & 7);
905 if (show_bits(&s->gb, i) == (1 << i) - 1) {
906 int pos = get_bits_count(&s->gb);
907 align_get_bits(&s->gb);
908 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
909 skip_bits(&s->gb, 8);
910 if ((get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
911 for (i = 0; i < nb_components; i++) /* reset dc */
912 s->last_dc[i] = 1024;
914 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
922 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
923 int se, int Ah, int Al,
924 const uint8_t *mb_bitmask,
925 const AVFrame *reference)
929 int c = s->comp_index[0];
930 uint8_t *data = s->picture_ptr->data[c];
931 const uint8_t *reference_data = reference ? reference->data[c] : NULL;
932 int linesize = s->linesize[c];
934 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
935 GetBitContext mb_bitmask_gb;
938 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
941 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
942 last_scan = !~s->coefs_finished[c];
945 if (s->interlaced && s->bottom_field) {
946 int offset = linesize >> 1;
948 reference_data += offset;
951 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
952 int block_offset = mb_y * linesize * 8;
953 uint8_t *ptr = data + block_offset;
954 int block_idx = mb_y * s->block_stride[c];
955 int16_t (*block)[64] = &s->blocks[c][block_idx];
956 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
957 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
958 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
963 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
964 quant_matrix, ss, se, Al, &EOBRUN);
966 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
967 quant_matrix, ss, se, Al, &EOBRUN);
969 av_log(s->avctx, AV_LOG_ERROR,
970 "error y=%d x=%d\n", mb_y, mb_x);
971 return AVERROR_INVALIDDATA;
977 s->dsp.put_pixels_tab[1][0](ptr,
978 reference_data + block_offset,
981 s->dsp.idct_put(ptr, linesize, *block);
990 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
991 const AVFrame *reference)
993 int len, nb_components, i, h, v, predictor, point_transform;
995 const int block_size = s->lossless ? 1 : 8;
998 /* XXX: verify len field validity */
999 len = get_bits(&s->gb, 16);
1000 nb_components = get_bits(&s->gb, 8);
1001 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1002 av_log(s->avctx, AV_LOG_ERROR,
1003 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1004 return AVERROR_PATCHWELCOME;
1006 if (len != 6 + 2 * nb_components) {
1007 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1008 return AVERROR_INVALIDDATA;
1010 for (i = 0; i < nb_components; i++) {
1011 id = get_bits(&s->gb, 8) - 1;
1012 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1013 /* find component index */
1014 for (index = 0; index < s->nb_components; index++)
1015 if (id == s->component_id[index])
1017 if (index == s->nb_components) {
1018 av_log(s->avctx, AV_LOG_ERROR,
1019 "decode_sos: index(%d) out of components\n", index);
1020 return AVERROR_INVALIDDATA;
1022 /* Metasoft MJPEG codec has Cb and Cr swapped */
1023 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1024 && nb_components == 3 && s->nb_components == 3 && i)
1027 s->comp_index[i] = index;
1029 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1030 s->h_scount[i] = s->h_count[index];
1031 s->v_scount[i] = s->v_count[index];
1033 s->dc_index[i] = get_bits(&s->gb, 4);
1034 s->ac_index[i] = get_bits(&s->gb, 4);
1036 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1037 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1039 if (!s->vlcs[0][s->dc_index[i]].table ||
1040 !s->vlcs[1][s->ac_index[i]].table)
1044 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1045 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1046 prev_shift = get_bits(&s->gb, 4); /* Ah */
1047 point_transform = get_bits(&s->gb, 4); /* Al */
1049 if (nb_components > 1) {
1050 /* interleaved stream */
1051 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1052 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1053 } else if (!s->ls) { /* skip this for JPEG-LS */
1054 h = s->h_max / s->h_scount[0];
1055 v = s->v_max / s->v_scount[0];
1056 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1057 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1058 s->nb_blocks[0] = 1;
1063 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1064 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n",
1065 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1066 predictor, point_transform, ilv, s->bits,
1067 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
1070 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1071 for (i = s->mjpb_skiptosod; i > 0; i--)
1072 skip_bits(&s->gb, 8);
1075 for (i = 0; i < nb_components; i++)
1076 s->last_dc[i] = 1024;
1079 if (CONFIG_JPEGLS_DECODER && s->ls) {
1081 // reset_ls_coding_parameters(s, 0);
1083 if ((ret = ff_jpegls_decode_picture(s, predictor,
1084 point_transform, ilv)) < 0)
1088 if ((ret = ljpeg_decode_rgb_scan(s, predictor,
1089 point_transform)) < 0)
1092 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1093 point_transform)) < 0)
1098 if (s->progressive && predictor) {
1099 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1106 if ((ret = mjpeg_decode_scan(s, nb_components,
1107 prev_shift, point_transform,
1108 mb_bitmask, reference)) < 0)
1113 if (s->interlaced &&
1114 get_bits_left(&s->gb) > 32 &&
1115 show_bits(&s->gb, 8) == 0xFF) {
1116 GetBitContext bak = s->gb;
1117 align_get_bits(&bak);
1118 if (show_bits(&bak, 16) == 0xFFD1) {
1119 av_dlog(s->avctx, "AVRn interlaced picture marker found\n");
1121 skip_bits(&s->gb, 16);
1122 s->bottom_field ^= 1;
1131 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1132 return AVERROR_INVALIDDATA;
1135 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1137 if (get_bits(&s->gb, 16) != 4)
1138 return AVERROR_INVALIDDATA;
1139 s->restart_interval = get_bits(&s->gb, 16);
1140 s->restart_count = 0;
1141 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1142 s->restart_interval);
1147 static int mjpeg_decode_app(MJpegDecodeContext *s)
1151 len = get_bits(&s->gb, 16);
1153 return AVERROR_INVALIDDATA;
1154 if (8 * len > get_bits_left(&s->gb))
1155 return AVERROR_INVALIDDATA;
1157 id = get_bits_long(&s->gb, 32);
1158 id = av_be2ne32(id);
1161 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1162 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1164 /* Buggy AVID, it puts EOI only at every 10th frame. */
1165 /* Also, this fourcc is used by non-avid files too, it holds some
1166 information, but it's always present in AVID-created files. */
1167 if (id == AV_RL32("AVI1")) {
1173 4bytes field_size_less_padding
1176 i = get_bits(&s->gb, 8);
1178 s->bottom_field = 1;
1180 s->bottom_field = 0;
1182 skip_bits(&s->gb, 8);
1183 skip_bits(&s->gb, 32);
1184 skip_bits(&s->gb, 32);
1192 if (id == AV_RL32("JFIF")) {
1193 int t_w, t_h, v1, v2;
1194 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1195 v1 = get_bits(&s->gb, 8);
1196 v2 = get_bits(&s->gb, 8);
1197 skip_bits(&s->gb, 8);
1199 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1200 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1202 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1203 av_log(s->avctx, AV_LOG_INFO,
1204 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1206 s->avctx->sample_aspect_ratio.num,
1207 s->avctx->sample_aspect_ratio.den);
1209 t_w = get_bits(&s->gb, 8);
1210 t_h = get_bits(&s->gb, 8);
1212 /* skip thumbnail */
1213 if (len -10 - (t_w * t_h * 3) > 0)
1214 len -= t_w * t_h * 3;
1220 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1221 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1222 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1223 skip_bits(&s->gb, 16); /* version */
1224 skip_bits(&s->gb, 16); /* flags0 */
1225 skip_bits(&s->gb, 16); /* flags1 */
1226 skip_bits(&s->gb, 8); /* transform */
1231 if (id == AV_RL32("LJIF")) {
1232 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1233 av_log(s->avctx, AV_LOG_INFO,
1234 "Pegasus lossless jpeg header found\n");
1235 skip_bits(&s->gb, 16); /* version ? */
1236 skip_bits(&s->gb, 16); /* unknwon always 0? */
1237 skip_bits(&s->gb, 16); /* unknwon always 0? */
1238 skip_bits(&s->gb, 16); /* unknwon always 0? */
1239 switch (get_bits(&s->gb, 8)) {
1249 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1256 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1257 id = get_bits_long(&s->gb, 32);
1258 id = av_be2ne32(id);
1261 if (id == AV_RL32("mjpg")) {
1263 skip_bits(&s->gb, 32); /* field size */
1264 skip_bits(&s->gb, 32); /* pad field size */
1265 skip_bits(&s->gb, 32); /* next off */
1266 skip_bits(&s->gb, 32); /* quant off */
1267 skip_bits(&s->gb, 32); /* huff off */
1268 skip_bits(&s->gb, 32); /* image off */
1269 skip_bits(&s->gb, 32); /* scan off */
1270 skip_bits(&s->gb, 32); /* data off */
1272 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1273 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1278 /* slow but needed for extreme adobe jpegs */
1280 av_log(s->avctx, AV_LOG_ERROR,
1281 "mjpeg: error, decode_app parser read over the end\n");
1283 skip_bits(&s->gb, 8);
1288 static int mjpeg_decode_com(MJpegDecodeContext *s)
1290 int len = get_bits(&s->gb, 16);
1291 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1292 char *cbuf = av_malloc(len - 1);
1295 for (i = 0; i < len - 2; i++)
1296 cbuf[i] = get_bits(&s->gb, 8);
1297 if (i > 0 && cbuf[i - 1] == '\n')
1302 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1303 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1305 /* buggy avid, it puts EOI only at every 10th frame */
1306 if (!strcmp(cbuf, "AVID")) {
1308 } else if (!strcmp(cbuf, "CS=ITU601"))
1310 else if ((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
1311 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1321 /* return the 8 bit start code value and update the search
1322 state. Return -1 if no start code found */
1323 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1325 const uint8_t *buf_ptr;
1332 buf_ptr = *pbuf_ptr;
1333 while (buf_ptr < buf_end) {
1336 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1346 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1347 *pbuf_ptr = buf_ptr;
1351 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1352 const uint8_t **buf_ptr, const uint8_t *buf_end,
1353 const uint8_t **unescaped_buf_ptr,
1354 int *unescaped_buf_size)
1357 start_code = find_marker(buf_ptr, buf_end);
1359 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1361 return AVERROR(ENOMEM);
1363 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1364 if (start_code == SOS && !s->ls) {
1365 const uint8_t *src = *buf_ptr;
1366 uint8_t *dst = s->buffer;
1368 while (src < buf_end) {
1369 uint8_t x = *(src++);
1372 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1374 while (src < buf_end && x == 0xff)
1377 if (x >= 0xd0 && x <= 0xd7)
1384 *unescaped_buf_ptr = s->buffer;
1385 *unescaped_buf_size = dst - s->buffer;
1386 memset(s->buffer + *unescaped_buf_size, 0,
1387 FF_INPUT_BUFFER_PADDING_SIZE);
1389 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1390 (buf_end - *buf_ptr) - (dst - s->buffer));
1391 } else if (start_code == SOS && s->ls) {
1392 const uint8_t *src = *buf_ptr;
1393 uint8_t *dst = s->buffer;
1401 while (src + t < buf_end) {
1402 uint8_t x = src[t++];
1404 while ((src + t < buf_end) && x == 0xff)
1413 init_put_bits(&pb, dst, t);
1415 /* unescape bitstream */
1417 uint8_t x = src[b++];
1418 put_bits(&pb, 8, x);
1421 put_bits(&pb, 7, x);
1425 flush_put_bits(&pb);
1427 *unescaped_buf_ptr = dst;
1428 *unescaped_buf_size = (bit_count + 7) >> 3;
1429 memset(s->buffer + *unescaped_buf_size, 0,
1430 FF_INPUT_BUFFER_PADDING_SIZE);
1432 *unescaped_buf_ptr = *buf_ptr;
1433 *unescaped_buf_size = buf_end - *buf_ptr;
1439 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1442 const uint8_t *buf = avpkt->data;
1443 int buf_size = avpkt->size;
1444 MJpegDecodeContext *s = avctx->priv_data;
1445 const uint8_t *buf_end, *buf_ptr;
1446 const uint8_t *unescaped_buf_ptr;
1447 int unescaped_buf_size;
1451 s->got_picture = 0; // picture from previous image can not be reused
1453 buf_end = buf + buf_size;
1454 while (buf_ptr < buf_end) {
1455 /* find start next marker */
1456 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1458 &unescaped_buf_size);
1460 if (start_code < 0) {
1462 } else if (unescaped_buf_size > (1U<<29)) {
1463 av_log(avctx, AV_LOG_ERROR, "MJPEG packet 0x%x too big (0x%x/0x%x), corrupt data?\n",
1464 start_code, unescaped_buf_size, buf_size);
1465 return AVERROR_INVALIDDATA;
1467 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1468 start_code, buf_end - buf_ptr);
1470 init_get_bits(&s->gb, unescaped_buf_ptr, unescaped_buf_size * 8);
1472 s->start_code = start_code;
1473 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1474 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1476 /* process markers */
1477 if (start_code >= 0xd0 && start_code <= 0xd7)
1478 av_log(avctx, AV_LOG_DEBUG,
1479 "restart marker: %d\n", start_code & 0x0f);
1481 else if (start_code >= APP0 && start_code <= APP15)
1482 mjpeg_decode_app(s);
1484 else if (start_code == COM)
1485 mjpeg_decode_com(s);
1487 switch (start_code) {
1489 s->restart_interval = 0;
1490 s->restart_count = 0;
1491 /* nothing to do on SOI */
1494 ff_mjpeg_decode_dqt(s);
1497 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1498 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1507 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1514 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1521 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1528 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1532 if (!CONFIG_JPEGLS_DECODER ||
1533 (ret = ff_jpegls_decode_lse(s)) < 0)
1538 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1541 if (!s->got_picture) {
1542 av_log(avctx, AV_LOG_WARNING,
1543 "Found EOI before any SOF, ignoring\n");
1546 if (s->interlaced) {
1547 s->bottom_field ^= 1;
1548 /* if not bottom field, do not output image yet */
1549 if (s->bottom_field == !s->interlace_polarity)
1552 if ((ret = av_frame_ref(data, s->picture_ptr)) < 0)
1557 avctx->debug & FF_DEBUG_QP) {
1558 av_log(avctx, AV_LOG_DEBUG,
1559 "QP: %d\n", FFMAX3(s->qscale[0],
1566 if (!s->got_picture) {
1567 av_log(avctx, AV_LOG_WARNING,
1568 "Can not process SOS before SOF, skipping\n");
1571 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1572 (avctx->err_recognition & AV_EF_EXPLODE))
1574 /* buggy avid puts EOI every 10-20th frame */
1575 /* if restart period is over process EOI */
1576 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1580 mjpeg_decode_dri(s);
1592 av_log(avctx, AV_LOG_ERROR,
1593 "mjpeg: unsupported coding type (%x)\n", start_code);
1598 /* eof process start code */
1599 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1600 av_log(avctx, AV_LOG_DEBUG,
1601 "marker parser used %d bytes (%d bits)\n",
1602 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1605 if (s->got_picture) {
1606 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1609 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1610 return AVERROR_INVALIDDATA;
1612 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n",
1614 // return buf_end - buf_ptr;
1615 return buf_ptr - buf;
1618 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1620 MJpegDecodeContext *s = avctx->priv_data;
1624 av_frame_unref(s->picture_ptr);
1627 av_freep(&s->ljpeg_buffer);
1628 s->ljpeg_buffer_size = 0;
1630 for (i = 0; i < 3; i++) {
1631 for (j = 0; j < 4; j++)
1632 ff_free_vlc(&s->vlcs[i][j]);
1634 for (i = 0; i < MAX_COMPONENTS; i++) {
1635 av_freep(&s->blocks[i]);
1636 av_freep(&s->last_nnz[i]);
1641 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1642 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1643 static const AVOption options[] = {
1644 { "extern_huff", "Use external huffman table.",
1645 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
1649 static const AVClass mjpegdec_class = {
1650 .class_name = "MJPEG decoder",
1651 .item_name = av_default_item_name,
1653 .version = LIBAVUTIL_VERSION_INT,
1656 AVCodec ff_mjpeg_decoder = {
1658 .type = AVMEDIA_TYPE_VIDEO,
1659 .id = AV_CODEC_ID_MJPEG,
1660 .priv_data_size = sizeof(MJpegDecodeContext),
1661 .init = ff_mjpeg_decode_init,
1662 .close = ff_mjpeg_decode_end,
1663 .decode = ff_mjpeg_decode_frame,
1664 .capabilities = CODEC_CAP_DR1,
1665 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1666 .priv_class = &mjpegdec_class,
1669 AVCodec ff_thp_decoder = {
1671 .type = AVMEDIA_TYPE_VIDEO,
1672 .id = AV_CODEC_ID_THP,
1673 .priv_data_size = sizeof(MJpegDecodeContext),
1674 .init = ff_mjpeg_decode_init,
1675 .close = ff_mjpeg_decode_end,
1676 .decode = ff_mjpeg_decode_frame,
1677 .capabilities = CODEC_CAP_DR1,
1678 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),