3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2003 Alex Beregszaszi
5 * Copyright (c) 2003-2004 Michael Niedermayer
7 * Support for external huffman table, various fixes (AVID workaround),
8 * aspecting, new decode_frame mechanism and apple mjpeg-b support
11 * This file is part of Libav.
13 * Libav is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU Lesser General Public
15 * License as published by the Free Software Foundation; either
16 * version 2.1 of the License, or (at your option) any later version.
18 * Libav is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * Lesser General Public License for more details.
23 * You should have received a copy of the GNU Lesser General Public
24 * License along with Libav; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
35 #include "libavutil/imgutils.h"
36 #include "libavutil/opt.h"
41 #include "jpeglsdec.h"
44 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
45 const uint8_t *val_table, int nb_codes,
46 int use_static, int is_ac)
48 uint8_t huff_size[256] = { 0 };
49 uint16_t huff_code[256];
50 uint16_t huff_sym[256];
53 assert(nb_codes <= 256);
55 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
57 for (i = 0; i < 256; i++)
58 huff_sym[i] = i + 16 * is_ac;
61 huff_sym[0] = 16 * 256;
63 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
64 huff_code, 2, 2, huff_sym, 2, 2, use_static);
67 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
69 build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
70 avpriv_mjpeg_val_dc, 12, 0, 0);
71 build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
72 avpriv_mjpeg_val_dc, 12, 0, 0);
73 build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
74 avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
75 build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
76 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
77 build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
78 avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
79 build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
80 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
83 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
85 MJpegDecodeContext *s = avctx->priv_data;
87 if (!s->picture_ptr) {
88 s->picture = av_frame_alloc();
90 return AVERROR(ENOMEM);
91 s->picture_ptr = s->picture;
95 ff_hpeldsp_init(&s->hdsp, avctx->flags);
96 ff_dsputil_init(&s->dsp, avctx);
97 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
101 s->first_picture = 1;
102 s->org_height = avctx->coded_height;
103 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
105 build_basic_mjpeg_vlc(s);
107 if (s->extern_huff) {
109 av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
110 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
111 if ((ret = ff_mjpeg_decode_dht(s))) {
112 av_log(avctx, AV_LOG_ERROR,
113 "mjpeg: error using external huffman table\n");
117 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
118 s->interlace_polarity = 1; /* bottom field first */
119 av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
121 if (avctx->codec->id == AV_CODEC_ID_AMV)
128 /* quantize tables */
129 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
131 int len, index, i, j;
133 len = get_bits(&s->gb, 16) - 2;
136 /* only 8 bit precision handled */
137 if (get_bits(&s->gb, 4) != 0) {
138 av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
141 index = get_bits(&s->gb, 4);
144 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
145 /* read quant table */
146 for (i = 0; i < 64; i++) {
147 j = s->scantable.permutated[i];
148 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
151 // XXX FIXME finetune, and perhaps add dc too
152 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
153 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
154 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
155 index, s->qscale[index]);
161 /* decode huffman tables and build VLC decoders */
162 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
164 int len, index, i, class, n, v, code_max;
165 uint8_t bits_table[17];
166 uint8_t val_table[256];
169 len = get_bits(&s->gb, 16) - 2;
173 return AVERROR_INVALIDDATA;
174 class = get_bits(&s->gb, 4);
176 return AVERROR_INVALIDDATA;
177 index = get_bits(&s->gb, 4);
179 return AVERROR_INVALIDDATA;
181 for (i = 1; i <= 16; i++) {
182 bits_table[i] = get_bits(&s->gb, 8);
186 if (len < n || n > 256)
187 return AVERROR_INVALIDDATA;
190 for (i = 0; i < n; i++) {
191 v = get_bits(&s->gb, 8);
198 /* build VLC and flush previous vlc if present */
199 ff_free_vlc(&s->vlcs[class][index]);
200 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
201 class, index, code_max + 1);
202 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
203 code_max + 1, 0, class > 0)) < 0)
207 ff_free_vlc(&s->vlcs[2][index]);
208 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
209 code_max + 1, 0, 0)) < 0)
216 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
218 int len, nb_components, i, width, height, pix_fmt_id, ret;
220 /* XXX: verify len field validity */
221 len = get_bits(&s->gb, 16);
222 s->bits = get_bits(&s->gb, 8);
226 if (s->bits == 9 && !s->pegasus_rct)
227 s->rct = 1; // FIXME ugly
229 if (s->bits != 8 && !s->lossless) {
230 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
234 height = get_bits(&s->gb, 16);
235 width = get_bits(&s->gb, 16);
237 // HACK for odd_height.mov
238 if (s->interlaced && s->width == width && s->height == height + 1)
241 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
242 if (av_image_check_size(width, height, 0, s->avctx))
243 return AVERROR_INVALIDDATA;
245 nb_components = get_bits(&s->gb, 8);
246 if (nb_components <= 0 ||
247 nb_components > MAX_COMPONENTS)
249 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
250 if (nb_components != s->nb_components) {
251 av_log(s->avctx, AV_LOG_ERROR,
252 "nb_components changing in interlaced picture\n");
253 return AVERROR_INVALIDDATA;
256 if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
257 avpriv_report_missing_feature(s->avctx,
258 "JPEG-LS that is not <= 8 "
259 "bits/component or 16-bit gray");
260 return AVERROR_PATCHWELCOME;
262 s->nb_components = nb_components;
265 for (i = 0; i < nb_components; i++) {
267 s->component_id[i] = get_bits(&s->gb, 8) - 1;
268 s->h_count[i] = get_bits(&s->gb, 4);
269 s->v_count[i] = get_bits(&s->gb, 4);
270 /* compute hmax and vmax (only used in interleaved case) */
271 if (s->h_count[i] > s->h_max)
272 s->h_max = s->h_count[i];
273 if (s->v_count[i] > s->v_max)
274 s->v_max = s->v_count[i];
275 s->quant_index[i] = get_bits(&s->gb, 8);
276 if (s->quant_index[i] >= 4)
277 return AVERROR_INVALIDDATA;
278 if (!s->h_count[i] || !s->v_count[i]) {
279 av_log(s->avctx, AV_LOG_ERROR,
280 "Invalid sampling factor in component %d %d:%d\n",
281 i, s->h_count[i], s->v_count[i]);
282 return AVERROR_INVALIDDATA;
285 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
286 i, s->h_count[i], s->v_count[i],
287 s->component_id[i], s->quant_index[i]);
290 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
291 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
292 return AVERROR_PATCHWELCOME;
295 if (s->v_max == 1 && s->h_max == 1 && s->lossless == 1)
298 /* if different size, realloc/alloc picture */
299 /* XXX: also check h_count and v_count */
300 if (width != s->width || height != s->height) {
305 /* test interlaced mode */
306 if (s->first_picture &&
307 s->org_height != 0 &&
308 s->height < ((s->org_height * 3) / 4)) {
310 s->bottom_field = s->interlace_polarity;
311 s->picture_ptr->interlaced_frame = 1;
312 s->picture_ptr->top_field_first = !s->interlace_polarity;
316 ret = ff_set_dimensions(s->avctx, width, height);
320 s->first_picture = 0;
323 if (!(s->interlaced && (s->bottom_field == !s->interlace_polarity))) {
324 /* XXX: not complete test ! */
325 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
326 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
327 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
328 (s->h_count[3] << 4) | s->v_count[3];
329 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
330 /* NOTE we do not allocate pictures large enough for the possible
331 * padding of h/v_count being 4 */
332 if (!(pix_fmt_id & 0xD0D0D0D0))
333 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
334 if (!(pix_fmt_id & 0x0D0D0D0D))
335 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
337 switch (pix_fmt_id) {
340 s->avctx->pix_fmt = AV_PIX_FMT_BGRA;
342 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
343 assert(s->nb_components == 3);
346 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
349 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
352 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
355 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
358 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
359 return AVERROR_PATCHWELCOME;
362 if (s->nb_components > 1)
363 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
364 else if (s->bits <= 8)
365 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
367 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
370 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
372 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
376 av_frame_unref(s->picture_ptr);
377 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0) {
378 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
381 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
382 s->picture_ptr->key_frame = 1;
385 for (i = 0; i < 3; i++)
386 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
388 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
389 s->width, s->height, s->linesize[0], s->linesize[1],
390 s->interlaced, s->avctx->height);
392 if (len != (8 + (3 * nb_components)))
393 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
396 /* totally blank picture as progressive JPEG will only add details to it */
397 if (s->progressive) {
398 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
399 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
400 for (i = 0; i < s->nb_components; i++) {
401 int size = bw * bh * s->h_count[i] * s->v_count[i];
402 av_freep(&s->blocks[i]);
403 av_freep(&s->last_nnz[i]);
404 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
405 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
406 s->block_stride[i] = bw * s->h_count[i];
408 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
413 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
416 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
418 av_log(s->avctx, AV_LOG_WARNING,
419 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
420 0, dc_index, &s->vlcs[0][dc_index]);
425 return get_xbits(&s->gb, code);
430 /* decode block and dequantize */
431 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
432 int dc_index, int ac_index, int16_t *quant_matrix)
434 int code, i, j, level, val;
437 val = mjpeg_decode_dc(s, dc_index);
439 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
440 return AVERROR_INVALIDDATA;
442 val = val * quant_matrix[0] + s->last_dc[component];
443 s->last_dc[component] = val;
447 {OPEN_READER(re, &s->gb);
449 UPDATE_CACHE(re, &s->gb);
450 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
452 i += ((unsigned)code) >> 4;
455 if (code > MIN_CACHE_BITS - 16)
456 UPDATE_CACHE(re, &s->gb);
459 int cache = GET_CACHE(re, &s->gb);
460 int sign = (~cache) >> 31;
461 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
464 LAST_SKIP_BITS(re, &s->gb, code);
467 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
468 return AVERROR_INVALIDDATA;
470 j = s->scantable.permutated[i];
471 block[j] = level * quant_matrix[j];
474 CLOSE_READER(re, &s->gb);}
479 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
480 int component, int dc_index,
481 int16_t *quant_matrix, int Al)
484 s->dsp.clear_block(block);
485 val = mjpeg_decode_dc(s, dc_index);
487 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
488 return AVERROR_INVALIDDATA;
490 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
491 s->last_dc[component] = val;
496 /* decode block and dequantize - progressive JPEG version */
497 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
498 uint8_t *last_nnz, int ac_index,
499 int16_t *quant_matrix,
500 int ss, int se, int Al, int *EOBRUN)
502 int code, i, j, level, val, run;
510 OPEN_READER(re, &s->gb);
511 for (i = ss; ; i++) {
512 UPDATE_CACHE(re, &s->gb);
513 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
515 run = ((unsigned) code) >> 4;
519 if (code > MIN_CACHE_BITS - 16)
520 UPDATE_CACHE(re, &s->gb);
523 int cache = GET_CACHE(re, &s->gb);
524 int sign = (~cache) >> 31;
525 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
528 LAST_SKIP_BITS(re, &s->gb, code);
532 j = s->scantable.permutated[se];
533 block[j] = level * quant_matrix[j] << Al;
536 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
537 return AVERROR_INVALIDDATA;
539 j = s->scantable.permutated[i];
540 block[j] = level * quant_matrix[j] << Al;
542 if (run == 0xF) {// ZRL - skip 15 coefficients
545 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
546 return AVERROR_INVALIDDATA;
551 UPDATE_CACHE(re, &s->gb);
552 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
553 LAST_SKIP_BITS(re, &s->gb, run);
560 CLOSE_READER(re, &s->gb);
569 #define REFINE_BIT(j) { \
570 UPDATE_CACHE(re, &s->gb); \
571 sign = block[j] >> 15; \
572 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
573 ((quant_matrix[j] ^ sign) - sign) << Al; \
574 LAST_SKIP_BITS(re, &s->gb, 1); \
582 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
587 j = s->scantable.permutated[i]; \
590 else if (run-- == 0) \
594 /* decode block and dequantize - progressive JPEG refinement pass */
595 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
597 int ac_index, int16_t *quant_matrix,
598 int ss, int se, int Al, int *EOBRUN)
600 int code, i = ss, j, sign, val, run;
601 int last = FFMIN(se, *last_nnz);
603 OPEN_READER(re, &s->gb);
608 UPDATE_CACHE(re, &s->gb);
609 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
612 run = ((unsigned) code) >> 4;
613 UPDATE_CACHE(re, &s->gb);
614 val = SHOW_UBITS(re, &s->gb, 1);
615 LAST_SKIP_BITS(re, &s->gb, 1);
617 j = s->scantable.permutated[i];
619 block[j] = ((quant_matrix[j]^val) - val) << Al;
623 CLOSE_READER(re, &s->gb);
627 run = ((unsigned) code) >> 4;
634 UPDATE_CACHE(re, &s->gb);
635 run += SHOW_UBITS(re, &s->gb, val);
636 LAST_SKIP_BITS(re, &s->gb, val);
648 for (; i <= last; i++) {
649 j = s->scantable.permutated[i];
653 CLOSE_READER(re, &s->gb);
660 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor,
664 uint16_t (*buffer)[4];
665 int left[3], top[3], topleft[3];
666 const int linesize = s->linesize[0];
667 const int mask = (1 << s->bits) - 1;
669 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
670 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
671 buffer = s->ljpeg_buffer;
673 for (i = 0; i < 3; i++)
674 buffer[0][i] = 1 << (s->bits + point_transform - 1);
676 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
677 const int modified_predictor = mb_y ? predictor : 1;
678 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
680 if (s->interlaced && s->bottom_field)
681 ptr += linesize >> 1;
683 for (i = 0; i < 3; i++)
684 top[i] = left[i] = topleft[i] = buffer[0][i];
686 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
687 if (s->restart_interval && !s->restart_count)
688 s->restart_count = s->restart_interval;
690 for (i = 0; i < 3; i++) {
694 top[i] = buffer[mb_x][i];
696 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
698 left[i] = buffer[mb_x][i] =
699 mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
702 if (s->restart_interval && !--s->restart_count) {
703 align_get_bits(&s->gb);
704 skip_bits(&s->gb, 16); /* skip RSTn */
709 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
710 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
711 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
712 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
714 } else if (s->pegasus_rct) {
715 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
716 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
717 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
718 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
721 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
722 ptr[4 * mb_x + 0] = buffer[mb_x][2];
723 ptr[4 * mb_x + 1] = buffer[mb_x][1];
724 ptr[4 * mb_x + 2] = buffer[mb_x][0];
731 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
732 int point_transform, int nb_components)
736 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
737 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
738 if (s->restart_interval && !s->restart_count)
739 s->restart_count = s->restart_interval;
741 if (mb_x == 0 || mb_y == 0 || s->interlaced) {
742 for (i = 0; i < nb_components; i++) {
744 int n, h, v, x, y, c, j, linesize;
746 c = s->comp_index[i];
751 linesize = s->linesize[c];
753 for (j = 0; j < n; j++) {
755 // FIXME optimize this crap
756 ptr = s->picture_ptr->data[c] +
757 (linesize * (v * mb_y + y)) +
759 if (y == 0 && mb_y == 0) {
760 if (x == 0 && mb_x == 0)
761 pred = 128 << point_transform;
765 if (x == 0 && mb_x == 0)
766 pred = ptr[-linesize];
768 PREDICT(pred, ptr[-linesize - 1],
769 ptr[-linesize], ptr[-1], predictor);
772 if (s->interlaced && s->bottom_field)
773 ptr += linesize >> 1;
774 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
783 for (i = 0; i < nb_components; i++) {
785 int n, h, v, x, y, c, j, linesize;
787 c = s->comp_index[i];
792 linesize = s->linesize[c];
794 for (j = 0; j < n; j++) {
797 // FIXME optimize this crap
798 ptr = s->picture_ptr->data[c] +
799 (linesize * (v * mb_y + y)) +
801 PREDICT(pred, ptr[-linesize - 1],
802 ptr[-linesize], ptr[-1], predictor);
803 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
811 if (s->restart_interval && !--s->restart_count) {
812 align_get_bits(&s->gb);
813 skip_bits(&s->gb, 16); /* skip RSTn */
820 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
821 int Al, const uint8_t *mb_bitmask,
822 const AVFrame *reference)
825 uint8_t *data[MAX_COMPONENTS];
826 const uint8_t *reference_data[MAX_COMPONENTS];
827 int linesize[MAX_COMPONENTS];
828 GetBitContext mb_bitmask_gb;
831 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
833 for (i = 0; i < nb_components; i++) {
834 int c = s->comp_index[i];
835 data[c] = s->picture_ptr->data[c];
836 reference_data[c] = reference ? reference->data[c] : NULL;
837 linesize[c] = s->linesize[c];
838 s->coefs_finished[c] |= 1;
841 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
842 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
843 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
845 if (s->restart_interval && !s->restart_count)
846 s->restart_count = s->restart_interval;
848 if (get_bits_left(&s->gb) < 0) {
849 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
850 -get_bits_left(&s->gb));
851 return AVERROR_INVALIDDATA;
853 for (i = 0; i < nb_components; i++) {
855 int n, h, v, x, y, c, j;
858 c = s->comp_index[i];
863 for (j = 0; j < n; j++) {
864 block_offset = ((linesize[c] * (v * mb_y + y) * 8) +
867 if (s->interlaced && s->bottom_field)
868 block_offset += linesize[c] >> 1;
869 ptr = data[c] + block_offset;
870 if (!s->progressive) {
872 s->hdsp.put_pixels_tab[1][0](ptr,
873 reference_data[c] + block_offset,
876 s->dsp.clear_block(s->block);
877 if (decode_block(s, s->block, i,
878 s->dc_index[i], s->ac_index[i],
879 s->quant_matrixes[s->quant_index[c]]) < 0) {
880 av_log(s->avctx, AV_LOG_ERROR,
881 "error y=%d x=%d\n", mb_y, mb_x);
882 return AVERROR_INVALIDDATA;
884 s->dsp.idct_put(ptr, linesize[c], s->block);
887 int block_idx = s->block_stride[c] * (v * mb_y + y) +
889 int16_t *block = s->blocks[c][block_idx];
891 block[0] += get_bits1(&s->gb) *
892 s->quant_matrixes[s->quant_index[c]][0] << Al;
893 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
894 s->quant_matrixes[s->quant_index[c]],
896 av_log(s->avctx, AV_LOG_ERROR,
897 "error y=%d x=%d\n", mb_y, mb_x);
898 return AVERROR_INVALIDDATA;
901 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
902 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
903 mb_x, mb_y, x, y, c, s->bottom_field,
904 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
912 if (s->restart_interval) {
914 i = 8 + ((-get_bits_count(&s->gb)) & 7);
916 if (show_bits(&s->gb, i) == (1 << i) - 1) {
917 int pos = get_bits_count(&s->gb);
918 align_get_bits(&s->gb);
919 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
920 skip_bits(&s->gb, 8);
921 if ((get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
922 for (i = 0; i < nb_components; i++) /* reset dc */
923 s->last_dc[i] = 1024;
925 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
933 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
934 int se, int Ah, int Al,
935 const uint8_t *mb_bitmask,
936 const AVFrame *reference)
940 int c = s->comp_index[0];
941 uint8_t *data = s->picture_ptr->data[c];
942 const uint8_t *reference_data = reference ? reference->data[c] : NULL;
943 int linesize = s->linesize[c];
945 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
946 GetBitContext mb_bitmask_gb;
948 if (ss < 0 || ss >= 64 ||
949 se < ss || se >= 64 ||
951 return AVERROR_INVALIDDATA;
954 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
957 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
958 last_scan = !~s->coefs_finished[c];
961 if (s->interlaced && s->bottom_field) {
962 int offset = linesize >> 1;
964 reference_data += offset;
967 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
968 int block_offset = mb_y * linesize * 8;
969 uint8_t *ptr = data + block_offset;
970 int block_idx = mb_y * s->block_stride[c];
971 int16_t (*block)[64] = &s->blocks[c][block_idx];
972 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
973 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
974 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
979 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
980 quant_matrix, ss, se, Al, &EOBRUN);
982 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
983 quant_matrix, ss, se, Al, &EOBRUN);
985 av_log(s->avctx, AV_LOG_ERROR,
986 "error y=%d x=%d\n", mb_y, mb_x);
987 return AVERROR_INVALIDDATA;
993 s->hdsp.put_pixels_tab[1][0](ptr,
994 reference_data + block_offset,
997 s->dsp.idct_put(ptr, linesize, *block);
1006 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1007 const AVFrame *reference)
1009 int len, nb_components, i, h, v, predictor, point_transform;
1011 const int block_size = s->lossless ? 1 : 8;
1012 int ilv, prev_shift;
1014 /* XXX: verify len field validity */
1015 len = get_bits(&s->gb, 16);
1016 nb_components = get_bits(&s->gb, 8);
1017 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1018 av_log(s->avctx, AV_LOG_ERROR,
1019 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1020 return AVERROR_PATCHWELCOME;
1022 if (len != 6 + 2 * nb_components) {
1023 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1024 return AVERROR_INVALIDDATA;
1026 for (i = 0; i < nb_components; i++) {
1027 id = get_bits(&s->gb, 8) - 1;
1028 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1029 /* find component index */
1030 for (index = 0; index < s->nb_components; index++)
1031 if (id == s->component_id[index])
1033 if (index == s->nb_components) {
1034 av_log(s->avctx, AV_LOG_ERROR,
1035 "decode_sos: index(%d) out of components\n", index);
1036 return AVERROR_INVALIDDATA;
1038 /* Metasoft MJPEG codec has Cb and Cr swapped */
1039 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1040 && nb_components == 3 && s->nb_components == 3 && i)
1043 s->comp_index[i] = index;
1045 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1046 s->h_scount[i] = s->h_count[index];
1047 s->v_scount[i] = s->v_count[index];
1049 s->dc_index[i] = get_bits(&s->gb, 4);
1050 s->ac_index[i] = get_bits(&s->gb, 4);
1052 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1053 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1055 if (!s->vlcs[0][s->dc_index[i]].table ||
1056 !s->vlcs[1][s->ac_index[i]].table)
1060 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1061 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1062 prev_shift = get_bits(&s->gb, 4); /* Ah */
1063 point_transform = get_bits(&s->gb, 4); /* Al */
1065 if (nb_components > 1) {
1066 /* interleaved stream */
1067 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1068 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1069 } else if (!s->ls) { /* skip this for JPEG-LS */
1070 h = s->h_max / s->h_scount[0];
1071 v = s->v_max / s->v_scount[0];
1072 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1073 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1074 s->nb_blocks[0] = 1;
1079 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1080 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n",
1081 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1082 predictor, point_transform, ilv, s->bits,
1083 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
1086 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1087 for (i = s->mjpb_skiptosod; i > 0; i--)
1088 skip_bits(&s->gb, 8);
1091 for (i = 0; i < nb_components; i++)
1092 s->last_dc[i] = 1024;
1095 if (CONFIG_JPEGLS_DECODER && s->ls) {
1097 // reset_ls_coding_parameters(s, 0);
1099 if ((ret = ff_jpegls_decode_picture(s, predictor,
1100 point_transform, ilv)) < 0)
1104 if ((ret = ljpeg_decode_rgb_scan(s, predictor,
1105 point_transform)) < 0)
1108 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1110 nb_components)) < 0)
1115 if (s->progressive && predictor) {
1116 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1123 if ((ret = mjpeg_decode_scan(s, nb_components,
1124 prev_shift, point_transform,
1125 mb_bitmask, reference)) < 0)
1130 if (s->interlaced &&
1131 get_bits_left(&s->gb) > 32 &&
1132 show_bits(&s->gb, 8) == 0xFF) {
1133 GetBitContext bak = s->gb;
1134 align_get_bits(&bak);
1135 if (show_bits(&bak, 16) == 0xFFD1) {
1136 av_dlog(s->avctx, "AVRn interlaced picture marker found\n");
1138 skip_bits(&s->gb, 16);
1139 s->bottom_field ^= 1;
1148 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1149 return AVERROR_INVALIDDATA;
1152 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1154 if (get_bits(&s->gb, 16) != 4)
1155 return AVERROR_INVALIDDATA;
1156 s->restart_interval = get_bits(&s->gb, 16);
1157 s->restart_count = 0;
1158 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1159 s->restart_interval);
1164 static int mjpeg_decode_app(MJpegDecodeContext *s)
1168 len = get_bits(&s->gb, 16);
1170 return AVERROR_INVALIDDATA;
1171 if (8 * len > get_bits_left(&s->gb))
1172 return AVERROR_INVALIDDATA;
1174 id = get_bits_long(&s->gb, 32);
1175 id = av_be2ne32(id);
1178 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1179 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1181 /* Buggy AVID, it puts EOI only at every 10th frame. */
1182 /* Also, this fourcc is used by non-avid files too, it holds some
1183 information, but it's always present in AVID-created files. */
1184 if (id == AV_RL32("AVI1")) {
1190 4bytes field_size_less_padding
1193 i = get_bits(&s->gb, 8);
1195 s->bottom_field = 1;
1197 s->bottom_field = 0;
1199 skip_bits(&s->gb, 8);
1200 skip_bits(&s->gb, 32);
1201 skip_bits(&s->gb, 32);
1209 if (id == AV_RL32("JFIF")) {
1210 int t_w, t_h, v1, v2;
1211 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1212 v1 = get_bits(&s->gb, 8);
1213 v2 = get_bits(&s->gb, 8);
1214 skip_bits(&s->gb, 8);
1216 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1217 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1219 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1220 av_log(s->avctx, AV_LOG_INFO,
1221 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1223 s->avctx->sample_aspect_ratio.num,
1224 s->avctx->sample_aspect_ratio.den);
1226 t_w = get_bits(&s->gb, 8);
1227 t_h = get_bits(&s->gb, 8);
1229 /* skip thumbnail */
1230 if (len -10 - (t_w * t_h * 3) > 0)
1231 len -= t_w * t_h * 3;
1237 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1238 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1239 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1240 skip_bits(&s->gb, 16); /* version */
1241 skip_bits(&s->gb, 16); /* flags0 */
1242 skip_bits(&s->gb, 16); /* flags1 */
1243 skip_bits(&s->gb, 8); /* transform */
1248 if (id == AV_RL32("LJIF")) {
1249 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1250 av_log(s->avctx, AV_LOG_INFO,
1251 "Pegasus lossless jpeg header found\n");
1252 skip_bits(&s->gb, 16); /* version ? */
1253 skip_bits(&s->gb, 16); /* unknwon always 0? */
1254 skip_bits(&s->gb, 16); /* unknwon always 0? */
1255 skip_bits(&s->gb, 16); /* unknwon always 0? */
1256 switch (get_bits(&s->gb, 8)) {
1266 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1273 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1274 id = get_bits_long(&s->gb, 32);
1275 id = av_be2ne32(id);
1278 if (id == AV_RL32("mjpg")) {
1280 skip_bits(&s->gb, 32); /* field size */
1281 skip_bits(&s->gb, 32); /* pad field size */
1282 skip_bits(&s->gb, 32); /* next off */
1283 skip_bits(&s->gb, 32); /* quant off */
1284 skip_bits(&s->gb, 32); /* huff off */
1285 skip_bits(&s->gb, 32); /* image off */
1286 skip_bits(&s->gb, 32); /* scan off */
1287 skip_bits(&s->gb, 32); /* data off */
1289 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1290 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1295 /* slow but needed for extreme adobe jpegs */
1297 av_log(s->avctx, AV_LOG_ERROR,
1298 "mjpeg: error, decode_app parser read over the end\n");
1300 skip_bits(&s->gb, 8);
1305 static int mjpeg_decode_com(MJpegDecodeContext *s)
1307 int len = get_bits(&s->gb, 16);
1308 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1309 char *cbuf = av_malloc(len - 1);
1312 for (i = 0; i < len - 2; i++)
1313 cbuf[i] = get_bits(&s->gb, 8);
1314 if (i > 0 && cbuf[i - 1] == '\n')
1319 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1320 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1322 /* buggy avid, it puts EOI only at every 10th frame */
1323 if (!strcmp(cbuf, "AVID")) {
1325 } else if (!strcmp(cbuf, "CS=ITU601"))
1327 else if ((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
1328 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1338 /* return the 8 bit start code value and update the search
1339 state. Return -1 if no start code found */
1340 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1342 const uint8_t *buf_ptr;
1349 buf_ptr = *pbuf_ptr;
1350 while (buf_ptr < buf_end) {
1353 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1363 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1364 *pbuf_ptr = buf_ptr;
1368 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1369 const uint8_t **buf_ptr, const uint8_t *buf_end,
1370 const uint8_t **unescaped_buf_ptr,
1371 int *unescaped_buf_size)
1374 start_code = find_marker(buf_ptr, buf_end);
1376 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1378 return AVERROR(ENOMEM);
1380 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1381 if (start_code == SOS && !s->ls) {
1382 const uint8_t *src = *buf_ptr;
1383 uint8_t *dst = s->buffer;
1385 while (src < buf_end) {
1386 uint8_t x = *(src++);
1389 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1391 while (src < buf_end && x == 0xff)
1394 if (x >= 0xd0 && x <= 0xd7)
1401 *unescaped_buf_ptr = s->buffer;
1402 *unescaped_buf_size = dst - s->buffer;
1403 memset(s->buffer + *unescaped_buf_size, 0,
1404 FF_INPUT_BUFFER_PADDING_SIZE);
1406 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1407 (buf_end - *buf_ptr) - (dst - s->buffer));
1408 } else if (start_code == SOS && s->ls) {
1409 const uint8_t *src = *buf_ptr;
1410 uint8_t *dst = s->buffer;
1418 while (src + t < buf_end) {
1419 uint8_t x = src[t++];
1421 while ((src + t < buf_end) && x == 0xff)
1430 init_put_bits(&pb, dst, t);
1432 /* unescape bitstream */
1434 uint8_t x = src[b++];
1435 put_bits(&pb, 8, x);
1438 put_bits(&pb, 7, x);
1442 flush_put_bits(&pb);
1444 *unescaped_buf_ptr = dst;
1445 *unescaped_buf_size = (bit_count + 7) >> 3;
1446 memset(s->buffer + *unescaped_buf_size, 0,
1447 FF_INPUT_BUFFER_PADDING_SIZE);
1449 *unescaped_buf_ptr = *buf_ptr;
1450 *unescaped_buf_size = buf_end - *buf_ptr;
1456 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1459 AVFrame *frame = data;
1460 const uint8_t *buf = avpkt->data;
1461 int buf_size = avpkt->size;
1462 MJpegDecodeContext *s = avctx->priv_data;
1463 const uint8_t *buf_end, *buf_ptr;
1464 const uint8_t *unescaped_buf_ptr;
1465 int unescaped_buf_size;
1469 s->got_picture = 0; // picture from previous image can not be reused
1471 buf_end = buf + buf_size;
1472 while (buf_ptr < buf_end) {
1473 /* find start next marker */
1474 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1476 &unescaped_buf_size);
1478 if (start_code < 0) {
1480 } else if (unescaped_buf_size > INT_MAX / 8) {
1481 av_log(avctx, AV_LOG_ERROR,
1482 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1483 start_code, unescaped_buf_size, buf_size);
1484 return AVERROR_INVALIDDATA;
1487 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1488 start_code, buf_end - buf_ptr);
1490 ret = init_get_bits(&s->gb, unescaped_buf_ptr,
1491 unescaped_buf_size * 8);
1495 s->start_code = start_code;
1496 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1497 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1499 /* process markers */
1500 if (start_code >= 0xd0 && start_code <= 0xd7)
1501 av_log(avctx, AV_LOG_DEBUG,
1502 "restart marker: %d\n", start_code & 0x0f);
1504 else if (start_code >= APP0 && start_code <= APP15)
1505 mjpeg_decode_app(s);
1507 else if (start_code == COM)
1508 mjpeg_decode_com(s);
1510 if (!CONFIG_JPEGLS_DECODER &&
1511 (start_code == SOF48 || start_code == LSE)) {
1512 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
1513 return AVERROR(ENOSYS);
1516 switch (start_code) {
1518 s->restart_interval = 0;
1519 s->restart_count = 0;
1520 /* nothing to do on SOI */
1523 ff_mjpeg_decode_dqt(s);
1526 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1527 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1536 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1543 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1550 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1557 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1561 if (!CONFIG_JPEGLS_DECODER ||
1562 (ret = ff_jpegls_decode_lse(s)) < 0)
1567 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1570 if (!s->got_picture) {
1571 av_log(avctx, AV_LOG_WARNING,
1572 "Found EOI before any SOF, ignoring\n");
1575 if (s->interlaced) {
1576 s->bottom_field ^= 1;
1577 /* if not bottom field, do not output image yet */
1578 if (s->bottom_field == !s->interlace_polarity)
1581 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
1585 for (i = 0; frame->data[i]; i++) {
1586 int h = frame->height >> ((i == 1 || i == 2) ?
1587 s->pix_desc->log2_chroma_h : 0);
1588 frame->data[i] += frame->linesize[i] * (h - 1);
1589 frame->linesize[i] *= -1;
1595 avctx->debug & FF_DEBUG_QP) {
1596 av_log(avctx, AV_LOG_DEBUG,
1597 "QP: %d\n", FFMAX3(s->qscale[0],
1604 if (!s->got_picture) {
1605 av_log(avctx, AV_LOG_WARNING,
1606 "Can not process SOS before SOF, skipping\n");
1609 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1610 (avctx->err_recognition & AV_EF_EXPLODE))
1612 /* buggy avid puts EOI every 10-20th frame */
1613 /* if restart period is over process EOI */
1614 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1618 mjpeg_decode_dri(s);
1630 av_log(avctx, AV_LOG_ERROR,
1631 "mjpeg: unsupported coding type (%x)\n", start_code);
1636 /* eof process start code */
1637 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1638 av_log(avctx, AV_LOG_DEBUG,
1639 "marker parser used %d bytes (%d bits)\n",
1640 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1642 if (s->got_picture) {
1643 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1646 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1647 return AVERROR_INVALIDDATA;
1649 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n",
1651 // return buf_end - buf_ptr;
1652 return buf_ptr - buf;
1655 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1657 MJpegDecodeContext *s = avctx->priv_data;
1661 av_frame_free(&s->picture);
1662 s->picture_ptr = NULL;
1663 } else if (s->picture_ptr)
1664 av_frame_unref(s->picture_ptr);
1667 av_freep(&s->ljpeg_buffer);
1668 s->ljpeg_buffer_size = 0;
1670 for (i = 0; i < 3; i++) {
1671 for (j = 0; j < 4; j++)
1672 ff_free_vlc(&s->vlcs[i][j]);
1674 for (i = 0; i < MAX_COMPONENTS; i++) {
1675 av_freep(&s->blocks[i]);
1676 av_freep(&s->last_nnz[i]);
1681 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1682 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1683 static const AVOption options[] = {
1684 { "extern_huff", "Use external huffman table.",
1685 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
1689 static const AVClass mjpegdec_class = {
1690 .class_name = "MJPEG decoder",
1691 .item_name = av_default_item_name,
1693 .version = LIBAVUTIL_VERSION_INT,
1696 AVCodec ff_mjpeg_decoder = {
1698 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1699 .type = AVMEDIA_TYPE_VIDEO,
1700 .id = AV_CODEC_ID_MJPEG,
1701 .priv_data_size = sizeof(MJpegDecodeContext),
1702 .init = ff_mjpeg_decode_init,
1703 .close = ff_mjpeg_decode_end,
1704 .decode = ff_mjpeg_decode_frame,
1705 .capabilities = CODEC_CAP_DR1,
1706 .priv_class = &mjpegdec_class,
1709 AVCodec ff_thp_decoder = {
1711 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
1712 .type = AVMEDIA_TYPE_VIDEO,
1713 .id = AV_CODEC_ID_THP,
1714 .priv_data_size = sizeof(MJpegDecodeContext),
1715 .init = ff_mjpeg_decode_init,
1716 .close = ff_mjpeg_decode_end,
1717 .decode = ff_mjpeg_decode_frame,
1718 .capabilities = CODEC_CAP_DR1,