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 FFmpeg.
13 * FFmpeg 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 * FFmpeg 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 FFmpeg; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
33 #include "libavutil/imgutils.h"
34 #include "libavutil/avassert.h"
35 #include "libavutil/opt.h"
40 #include "jpeglsdec.h"
43 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
44 const uint8_t *val_table, int nb_codes,
45 int use_static, int is_ac)
47 uint8_t huff_size[256] = { 0 };
48 uint16_t huff_code[256];
49 uint16_t huff_sym[256];
52 av_assert0(nb_codes <= 256);
54 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
56 for (i = 0; i < 256; i++)
57 huff_sym[i] = i + 16 * is_ac;
60 huff_sym[0] = 16 * 256;
62 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
63 huff_code, 2, 2, huff_sym, 2, 2, use_static);
66 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
68 build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
69 avpriv_mjpeg_val_dc, 12, 0, 0);
70 build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
71 avpriv_mjpeg_val_dc, 12, 0, 0);
72 build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
73 avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
74 build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
75 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
76 build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
77 avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
78 build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
79 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
82 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
84 MJpegDecodeContext *s = avctx->priv_data;
87 s->picture_ptr = &s->picture;
88 avcodec_get_frame_defaults(&s->picture);
91 ff_dsputil_init(&s->dsp, avctx);
92 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
97 s->org_height = avctx->coded_height;
98 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
100 build_basic_mjpeg_vlc(s);
102 if (s->extern_huff) {
103 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
104 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
105 if (ff_mjpeg_decode_dht(s)) {
106 av_log(avctx, AV_LOG_ERROR,
107 "error using external huffman table, switching back to internal\n");
108 build_basic_mjpeg_vlc(s);
111 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
112 s->interlace_polarity = 1; /* bottom field first */
113 av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
115 if (avctx->codec->id == AV_CODEC_ID_AMV)
122 /* quantize tables */
123 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
125 int len, index, i, j;
127 len = get_bits(&s->gb, 16) - 2;
130 /* only 8 bit precision handled */
131 if (get_bits(&s->gb, 4) != 0) {
132 av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
135 index = get_bits(&s->gb, 4);
138 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
139 /* read quant table */
140 for (i = 0; i < 64; i++) {
141 j = s->scantable.permutated[i];
142 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
145 // XXX FIXME finetune, and perhaps add dc too
146 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
147 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
148 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
149 index, s->qscale[index]);
155 /* decode huffman tables and build VLC decoders */
156 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
158 int len, index, i, class, n, v, code_max;
159 uint8_t bits_table[17];
160 uint8_t val_table[256];
163 len = get_bits(&s->gb, 16) - 2;
167 return AVERROR_INVALIDDATA;
168 class = get_bits(&s->gb, 4);
170 return AVERROR_INVALIDDATA;
171 index = get_bits(&s->gb, 4);
173 return AVERROR_INVALIDDATA;
175 for (i = 1; i <= 16; i++) {
176 bits_table[i] = get_bits(&s->gb, 8);
180 if (len < n || n > 256)
181 return AVERROR_INVALIDDATA;
184 for (i = 0; i < n; i++) {
185 v = get_bits(&s->gb, 8);
192 /* build VLC and flush previous vlc if present */
193 ff_free_vlc(&s->vlcs[class][index]);
194 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
195 class, index, code_max + 1);
196 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
197 code_max + 1, 0, class > 0)) < 0)
201 ff_free_vlc(&s->vlcs[2][index]);
202 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
203 code_max + 1, 0, 0)) < 0)
210 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
212 int len, nb_components, i, width, height, pix_fmt_id;
215 s->upscale_h = s->upscale_v = 0;
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 if(s->lossless && s->avctx->lowres){
232 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
236 height = get_bits(&s->gb, 16);
237 width = get_bits(&s->gb, 16);
239 // HACK for odd_height.mov
240 if (s->interlaced && s->width == width && s->height == height + 1)
243 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
244 if (av_image_check_size(width, height, 0, s->avctx))
245 return AVERROR_INVALIDDATA;
247 nb_components = get_bits(&s->gb, 8);
248 if (nb_components <= 0 ||
249 nb_components > MAX_COMPONENTS)
251 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
252 if (nb_components != s->nb_components) {
253 av_log(s->avctx, AV_LOG_ERROR, "nb_components changing in interlaced picture\n");
254 return AVERROR_INVALIDDATA;
257 if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
258 av_log_missing_feature(s->avctx,
259 "For JPEG-LS anything except <= 8 bits/component"
260 " or 16-bit gray", 0);
261 return AVERROR_PATCHWELCOME;
263 s->nb_components = nb_components;
266 memset(s->h_count, 0, sizeof(s->h_count));
267 memset(s->v_count, 0, sizeof(s->v_count));
268 for (i = 0; i < nb_components; i++) {
270 s->component_id[i] = get_bits(&s->gb, 8) - 1;
271 s->h_count[i] = get_bits(&s->gb, 4);
272 s->v_count[i] = get_bits(&s->gb, 4);
273 /* compute hmax and vmax (only used in interleaved case) */
274 if (s->h_count[i] > s->h_max)
275 s->h_max = s->h_count[i];
276 if (s->v_count[i] > s->v_max)
277 s->v_max = s->v_count[i];
278 if (!s->h_count[i] || !s->v_count[i]) {
279 av_log(s->avctx, AV_LOG_ERROR, "h/v_count is 0\n");
282 s->quant_index[i] = get_bits(&s->gb, 8);
283 if (s->quant_index[i] >= 4)
284 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 av_log_missing_feature(s->avctx, "Subsampling in JPEG-LS", 0);
292 return AVERROR_PATCHWELCOME;
295 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && nb_components==3)
298 /* if different size, realloc/alloc picture */
299 /* XXX: also check h_count and v_count */
300 if (width != s->width || height != s->height) {
301 av_freep(&s->qscale_table);
307 /* test interlaced mode */
308 if (s->first_picture &&
309 s->org_height != 0 &&
310 s->height < ((s->org_height * 3) / 4)) {
312 s->bottom_field = s->interlace_polarity;
313 s->picture_ptr->interlaced_frame = 1;
314 s->picture_ptr->top_field_first = !s->interlace_polarity;
318 avcodec_set_dimensions(s->avctx, width, height);
320 s->qscale_table = av_mallocz((s->width + 15) / 16);
321 s->first_picture = 0;
324 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
325 if (s->progressive) {
326 av_log_ask_for_sample(s->avctx, "progressively coded interlaced pictures not supported\n");
327 return AVERROR_INVALIDDATA;
330 /* XXX: not complete test ! */
331 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
332 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
333 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
334 (s->h_count[3] << 4) | s->v_count[3];
335 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
336 /* NOTE we do not allocate pictures large enough for the possible
337 * padding of h/v_count being 4 */
338 if (!(pix_fmt_id & 0xD0D0D0D0))
339 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
340 if (!(pix_fmt_id & 0x0D0D0D0D))
341 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
343 switch (pix_fmt_id) {
346 s->avctx->pix_fmt = AV_PIX_FMT_BGR24;
348 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
349 s->avctx->pix_fmt = AV_PIX_FMT_GBR24P;
351 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
352 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
355 av_assert0(s->nb_components == 3);
359 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
360 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
362 s->upscale_h = (pix_fmt_id == 0x22122100);
363 s->chroma_height = s->height;
367 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
368 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
369 s->upscale_v = (pix_fmt_id == 0x22211200);
371 s->chroma_height = s->height;
374 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
375 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
378 s->chroma_height = s->height / 2;
382 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
384 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
389 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
390 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
391 s->upscale_h = (pix_fmt_id == 0x22211100) * 2 + (pix_fmt_id == 0x22112100);
392 s->chroma_height = s->height / 2;
395 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
396 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
400 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
401 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
402 s->upscale_v = (pix_fmt_id == 0x22121100) + 1;
405 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
406 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
409 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
410 return AVERROR_PATCHWELCOME;
412 if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
413 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
414 return AVERROR_PATCHWELCOME;
417 s->upscale_h = s->upscale_v = 0;
418 if (s->nb_components > 1)
419 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
420 else if (s->bits <= 8)
421 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
423 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
426 if (s->picture_ptr->data[0])
427 s->avctx->release_buffer(s->avctx, s->picture_ptr);
429 if (s->avctx->get_buffer(s->avctx, s->picture_ptr) < 0) {
430 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
433 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
434 s->picture_ptr->key_frame = 1;
437 for (i = 0; i < 3; i++)
438 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
440 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
441 s->width, s->height, s->linesize[0], s->linesize[1],
442 s->interlaced, s->avctx->height);
444 if (len != (8 + (3 * nb_components)))
445 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
448 /* totally blank picture as progressive JPEG will only add details to it */
449 if (s->progressive) {
450 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
451 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
452 for (i = 0; i < s->nb_components; i++) {
453 int size = bw * bh * s->h_count[i] * s->v_count[i];
454 av_freep(&s->blocks[i]);
455 av_freep(&s->last_nnz[i]);
456 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
457 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
458 s->block_stride[i] = bw * s->h_count[i];
460 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
465 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
468 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
470 av_log(s->avctx, AV_LOG_WARNING,
471 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
472 0, dc_index, &s->vlcs[0][dc_index]);
477 return get_xbits(&s->gb, code);
482 /* decode block and dequantize */
483 static int decode_block(MJpegDecodeContext *s, DCTELEM *block, int component,
484 int dc_index, int ac_index, int16_t *quant_matrix)
486 int code, i, j, level, val;
489 val = mjpeg_decode_dc(s, dc_index);
491 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
492 return AVERROR_INVALIDDATA;
494 val = val * quant_matrix[0] + s->last_dc[component];
495 s->last_dc[component] = val;
499 {OPEN_READER(re, &s->gb);
501 UPDATE_CACHE(re, &s->gb);
502 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
504 i += ((unsigned)code) >> 4;
507 if (code > MIN_CACHE_BITS - 16)
508 UPDATE_CACHE(re, &s->gb);
511 int cache = GET_CACHE(re, &s->gb);
512 int sign = (~cache) >> 31;
513 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
516 LAST_SKIP_BITS(re, &s->gb, code);
519 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
520 return AVERROR_INVALIDDATA;
522 j = s->scantable.permutated[i];
523 block[j] = level * quant_matrix[j];
526 CLOSE_READER(re, &s->gb);}
531 static int decode_dc_progressive(MJpegDecodeContext *s, DCTELEM *block,
532 int component, int dc_index,
533 int16_t *quant_matrix, int Al)
536 s->dsp.clear_block(block);
537 val = mjpeg_decode_dc(s, dc_index);
539 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
540 return AVERROR_INVALIDDATA;
542 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
543 s->last_dc[component] = val;
548 /* decode block and dequantize - progressive JPEG version */
549 static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block,
550 uint8_t *last_nnz, int ac_index,
551 int16_t *quant_matrix,
552 int ss, int se, int Al, int *EOBRUN)
554 int code, i, j, level, val, run;
562 OPEN_READER(re, &s->gb);
563 for (i = ss; ; i++) {
564 UPDATE_CACHE(re, &s->gb);
565 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
567 run = ((unsigned) code) >> 4;
571 if (code > MIN_CACHE_BITS - 16)
572 UPDATE_CACHE(re, &s->gb);
575 int cache = GET_CACHE(re, &s->gb);
576 int sign = (~cache) >> 31;
577 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
580 LAST_SKIP_BITS(re, &s->gb, code);
584 j = s->scantable.permutated[se];
585 block[j] = level * quant_matrix[j] << Al;
588 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
589 return AVERROR_INVALIDDATA;
591 j = s->scantable.permutated[i];
592 block[j] = level * quant_matrix[j] << Al;
594 if (run == 0xF) {// ZRL - skip 15 coefficients
597 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
598 return AVERROR_INVALIDDATA;
603 UPDATE_CACHE(re, &s->gb);
604 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
605 LAST_SKIP_BITS(re, &s->gb, run);
612 CLOSE_READER(re, &s->gb);
621 #define REFINE_BIT(j) { \
622 UPDATE_CACHE(re, &s->gb); \
623 sign = block[j] >> 15; \
624 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
625 ((quant_matrix[j] ^ sign) - sign) << Al; \
626 LAST_SKIP_BITS(re, &s->gb, 1); \
634 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
639 j = s->scantable.permutated[i]; \
642 else if (run-- == 0) \
646 /* decode block and dequantize - progressive JPEG refinement pass */
647 static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block,
649 int ac_index, int16_t *quant_matrix,
650 int ss, int se, int Al, int *EOBRUN)
652 int code, i = ss, j, sign, val, run;
653 int last = FFMIN(se, *last_nnz);
655 OPEN_READER(re, &s->gb);
660 UPDATE_CACHE(re, &s->gb);
661 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
664 run = ((unsigned) code) >> 4;
665 UPDATE_CACHE(re, &s->gb);
666 val = SHOW_UBITS(re, &s->gb, 1);
667 LAST_SKIP_BITS(re, &s->gb, 1);
669 j = s->scantable.permutated[i];
671 block[j] = ((quant_matrix[j]^val) - val) << Al;
675 CLOSE_READER(re, &s->gb);
679 run = ((unsigned) code) >> 4;
686 UPDATE_CACHE(re, &s->gb);
687 run += SHOW_UBITS(re, &s->gb, val);
688 LAST_SKIP_BITS(re, &s->gb, val);
700 for (; i <= last; i++) {
701 j = s->scantable.permutated[i];
705 CLOSE_READER(re, &s->gb);
712 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
715 uint16_t (*buffer)[4];
716 int left[3], top[3], topleft[3];
717 const int linesize = s->linesize[0];
718 const int mask = (1 << s->bits) - 1;
722 s->restart_count = s->restart_interval;
724 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
725 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
726 buffer = s->ljpeg_buffer;
728 for (i = 0; i < 3; i++)
729 buffer[0][i] = 1 << (s->bits - 1);
731 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
732 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
734 if (s->interlaced && s->bottom_field)
735 ptr += linesize >> 1;
737 for (i = 0; i < 3; i++)
738 top[i] = left[i] = topleft[i] = buffer[0][i];
740 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
741 int modified_predictor = predictor;
743 if (s->restart_interval && !s->restart_count){
744 s->restart_count = s->restart_interval;
748 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
750 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
751 modified_predictor = 1;
753 for (i=0;i<nb_components;i++) {
757 top[i] = buffer[mb_x][i];
759 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
761 dc = mjpeg_decode_dc(s, s->dc_index[i]);
765 left[i] = buffer[mb_x][i] =
766 mask & (pred + (dc << point_transform));
769 if (s->restart_interval && !--s->restart_count) {
770 align_get_bits(&s->gb);
771 skip_bits(&s->gb, 16); /* skip RSTn */
776 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
777 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
778 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
779 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
781 } else if (s->pegasus_rct) {
782 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
783 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
784 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
785 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
788 for(i=0; i<nb_components; i++) {
789 int c= s->comp_index[i];
790 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
791 ptr[3*mb_x+2-c] = buffer[mb_x][i];
799 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
803 const int nb_components=s->nb_components;
804 int bits= (s->bits+7)&~7;
808 point_transform += bits - s->bits;
810 av_assert0(nb_components==1 || nb_components==3);
812 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
813 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
814 if (s->restart_interval && !s->restart_count){
815 s->restart_count = s->restart_interval;
820 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
821 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
822 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
823 for (i = 0; i < nb_components; i++) {
826 int n, h, v, x, y, c, j, linesize;
828 c = s->comp_index[i];
833 linesize= s->linesize[c];
835 if(bits>8) linesize /= 2;
840 dc = mjpeg_decode_dc(s, s->dc_index[i]);
844 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
847 pred= 1 << (bits - 1);
853 pred= ptr[-linesize];
855 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
859 if (s->interlaced && s->bottom_field)
860 ptr += linesize >> 1;
861 pred &= (-1)<<(8-s->bits);
862 *ptr= pred + (dc << point_transform);
864 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
867 pred= 1 << (bits - 1);
873 pred= ptr16[-linesize];
875 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
879 if (s->interlaced && s->bottom_field)
880 ptr16 += linesize >> 1;
881 pred &= (-1)<<(16-s->bits);
882 *ptr16= pred + (dc << point_transform);
891 for (i = 0; i < nb_components; i++) {
894 int n, h, v, x, y, c, j, linesize, dc;
896 c = s->comp_index[i];
901 linesize = s->linesize[c];
903 if(bits>8) linesize /= 2;
905 for (j = 0; j < n; j++) {
908 dc = mjpeg_decode_dc(s, s->dc_index[i]);
912 ptr = s->picture.data[c] +
913 (linesize * (v * mb_y + y)) +
914 (h * mb_x + x); //FIXME optimize this crap
915 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
917 pred &= (-1)<<(8-s->bits);
918 *ptr = pred + (dc << point_transform);
920 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
921 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
923 pred &= (-1)<<(16-s->bits);
924 *ptr16= pred + (dc << point_transform);
934 if (s->restart_interval && !--s->restart_count) {
935 align_get_bits(&s->gb);
936 skip_bits(&s->gb, 16); /* skip RSTn */
943 static av_always_inline void mjpeg_copy_block(uint8_t *dst, const uint8_t *src,
944 int linesize, int lowres)
947 case 0: copy_block8(dst, src, linesize, linesize, 8);
949 case 1: copy_block4(dst, src, linesize, linesize, 4);
951 case 2: copy_block2(dst, src, linesize, linesize, 2);
958 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
959 int Al, const uint8_t *mb_bitmask,
960 const AVFrame *reference)
963 uint8_t *data[MAX_COMPONENTS];
964 const uint8_t *reference_data[MAX_COMPONENTS];
965 int linesize[MAX_COMPONENTS];
966 GetBitContext mb_bitmask_gb;
969 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
971 if (s->flipped && s->avctx->lowres) {
972 av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with lowres\n");
976 for (i = 0; i < nb_components; i++) {
977 int c = s->comp_index[i];
978 data[c] = s->picture_ptr->data[c];
979 reference_data[c] = reference ? reference->data[c] : NULL;
980 linesize[c] = s->linesize[c];
981 s->coefs_finished[c] |= 1;
982 if (s->flipped && !(s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
983 // picture should be flipped upside-down for this codec
984 int offset = (linesize[c] * (s->v_scount[i] *
985 (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
987 reference_data[c] += offset;
992 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
993 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
994 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
996 if (s->restart_interval && !s->restart_count)
997 s->restart_count = s->restart_interval;
999 if (get_bits_left(&s->gb) < 0) {
1000 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1001 -get_bits_left(&s->gb));
1002 return AVERROR_INVALIDDATA;
1004 for (i = 0; i < nb_components; i++) {
1006 int n, h, v, x, y, c, j;
1008 n = s->nb_blocks[i];
1009 c = s->comp_index[i];
1014 for (j = 0; j < n; j++) {
1015 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1016 (h * mb_x + x) * 8) >> s->avctx->lowres);
1018 if (s->interlaced && s->bottom_field)
1019 block_offset += linesize[c] >> 1;
1020 ptr = data[c] + block_offset;
1021 if (!s->progressive) {
1023 mjpeg_copy_block(ptr, reference_data[c] + block_offset,
1024 linesize[c], s->avctx->lowres);
1026 s->dsp.clear_block(s->block);
1027 if (decode_block(s, s->block, i,
1028 s->dc_index[i], s->ac_index[i],
1029 s->quant_matrixes[s->quant_index[c]]) < 0) {
1030 av_log(s->avctx, AV_LOG_ERROR,
1031 "error y=%d x=%d\n", mb_y, mb_x);
1032 return AVERROR_INVALIDDATA;
1034 s->dsp.idct_put(ptr, linesize[c], s->block);
1037 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1039 DCTELEM *block = s->blocks[c][block_idx];
1041 block[0] += get_bits1(&s->gb) *
1042 s->quant_matrixes[s->quant_index[c]][0] << Al;
1043 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1044 s->quant_matrixes[s->quant_index[c]],
1046 av_log(s->avctx, AV_LOG_ERROR,
1047 "error y=%d x=%d\n", mb_y, mb_x);
1048 return AVERROR_INVALIDDATA;
1051 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1052 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1053 mb_x, mb_y, x, y, c, s->bottom_field,
1054 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1062 if (s->restart_interval) {
1064 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
1065 align_get_bits(&s->gb);
1066 for (i = 0; i < nb_components; i++) /* reset dc */
1067 s->last_dc[i] = 1024;
1070 i = 8 + ((-get_bits_count(&s->gb)) & 7);
1072 if (show_bits(&s->gb, i) == (1 << i) - 1) {
1073 int pos = get_bits_count(&s->gb);
1074 align_get_bits(&s->gb);
1075 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
1076 skip_bits(&s->gb, 8);
1077 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
1078 for (i = 0; i < nb_components; i++) /* reset dc */
1079 s->last_dc[i] = 1024;
1081 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
1089 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1090 int se, int Ah, int Al)
1094 int c = s->comp_index[0];
1095 uint8_t *data = s->picture.data[c];
1096 int linesize = s->linesize[c];
1098 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
1101 av_log(s->avctx, AV_LOG_ERROR, "SE %d is too large\n", se);
1102 return AVERROR_INVALIDDATA;
1106 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
1107 last_scan = !~s->coefs_finished[c];
1110 if (s->interlaced && s->bottom_field)
1111 data += linesize >> 1;
1113 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1114 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1115 int block_idx = mb_y * s->block_stride[c];
1116 DCTELEM (*block)[64] = &s->blocks[c][block_idx];
1117 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1118 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1121 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1122 quant_matrix, ss, se, Al, &EOBRUN);
1124 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1125 quant_matrix, ss, se, Al, &EOBRUN);
1127 av_log(s->avctx, AV_LOG_ERROR,
1128 "error y=%d x=%d\n", mb_y, mb_x);
1129 return AVERROR_INVALIDDATA;
1133 s->dsp.idct_put(ptr, linesize, *block);
1134 ptr += 8 >> s->avctx->lowres;
1141 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1142 const AVFrame *reference)
1144 int len, nb_components, i, h, v, predictor, point_transform;
1146 const int block_size = s->lossless ? 1 : 8;
1147 int ilv, prev_shift;
1149 if (!s->got_picture) {
1150 av_log(s->avctx, AV_LOG_WARNING,
1151 "Can not process SOS before SOF, skipping\n");
1155 av_assert0(s->picture_ptr->data[0]);
1156 /* XXX: verify len field validity */
1157 len = get_bits(&s->gb, 16);
1158 nb_components = get_bits(&s->gb, 8);
1159 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1160 av_log(s->avctx, AV_LOG_ERROR,
1161 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1162 return AVERROR_PATCHWELCOME;
1164 if (len != 6 + 2 * nb_components) {
1165 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1166 return AVERROR_INVALIDDATA;
1168 for (i = 0; i < nb_components; i++) {
1169 id = get_bits(&s->gb, 8) - 1;
1170 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1171 /* find component index */
1172 for (index = 0; index < s->nb_components; index++)
1173 if (id == s->component_id[index])
1175 if (index == s->nb_components) {
1176 av_log(s->avctx, AV_LOG_ERROR,
1177 "decode_sos: index(%d) out of components\n", index);
1178 return AVERROR_INVALIDDATA;
1180 /* Metasoft MJPEG codec has Cb and Cr swapped */
1181 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1182 && nb_components == 3 && s->nb_components == 3 && i)
1185 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1187 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1188 index = (index+2)%3;
1190 s->comp_index[i] = index;
1192 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1193 s->h_scount[i] = s->h_count[index];
1194 s->v_scount[i] = s->v_count[index];
1196 s->dc_index[i] = get_bits(&s->gb, 4);
1197 s->ac_index[i] = get_bits(&s->gb, 4);
1199 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1200 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1202 if (!s->vlcs[0][s->dc_index[i]].table || !(s->progressive ? s->vlcs[2][s->ac_index[0]].table : s->vlcs[1][s->ac_index[i]].table))
1206 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1207 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1208 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1209 prev_shift = get_bits(&s->gb, 4); /* Ah */
1210 point_transform = get_bits(&s->gb, 4); /* Al */
1212 prev_shift = point_transform = 0;
1214 if (nb_components > 1) {
1215 /* interleaved stream */
1216 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1217 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1218 } else if (!s->ls) { /* skip this for JPEG-LS */
1219 h = s->h_max / s->h_scount[0];
1220 v = s->v_max / s->v_scount[0];
1221 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1222 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1223 s->nb_blocks[0] = 1;
1228 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1229 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1230 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1231 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1232 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1235 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1236 for (i = s->mjpb_skiptosod; i > 0; i--)
1237 skip_bits(&s->gb, 8);
1240 for (i = 0; i < nb_components; i++)
1241 s->last_dc[i] = 1024;
1244 av_assert0(s->picture_ptr == &s->picture);
1245 if (CONFIG_JPEGLS_DECODER && s->ls) {
1247 // reset_ls_coding_parameters(s, 0);
1249 if ((ret = ff_jpegls_decode_picture(s, predictor,
1250 point_transform, ilv)) < 0)
1254 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1257 if ((ret = ljpeg_decode_yuv_scan(s, predictor, point_transform)) < 0)
1262 if (s->progressive && predictor) {
1263 av_assert0(s->picture_ptr == &s->picture);
1264 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1266 point_transform)) < 0)
1269 if ((ret = mjpeg_decode_scan(s, nb_components,
1270 prev_shift, point_transform,
1271 mb_bitmask, reference)) < 0)
1276 if (s->interlaced &&
1277 get_bits_left(&s->gb) > 32 &&
1278 show_bits(&s->gb, 8) == 0xFF) {
1279 GetBitContext bak = s->gb;
1280 align_get_bits(&bak);
1281 if (show_bits(&bak, 16) == 0xFFD1) {
1282 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1284 skip_bits(&s->gb, 16);
1285 s->bottom_field ^= 1;
1294 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1295 return AVERROR_INVALIDDATA;
1298 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1300 if (get_bits(&s->gb, 16) != 4)
1301 return AVERROR_INVALIDDATA;
1302 s->restart_interval = get_bits(&s->gb, 16);
1303 s->restart_count = 0;
1304 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1305 s->restart_interval);
1310 static int mjpeg_decode_app(MJpegDecodeContext *s)
1314 len = get_bits(&s->gb, 16);
1316 return AVERROR_INVALIDDATA;
1317 if (8 * len > get_bits_left(&s->gb))
1318 return AVERROR_INVALIDDATA;
1320 id = get_bits_long(&s->gb, 32);
1321 id = av_be2ne32(id);
1324 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1325 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1327 /* Buggy AVID, it puts EOI only at every 10th frame. */
1328 /* Also, this fourcc is used by non-avid files too, it holds some
1329 information, but it's always present in AVID-created files. */
1330 if (id == AV_RL32("AVI1")) {
1336 4bytes field_size_less_padding
1339 i = get_bits(&s->gb, 8); len--;
1340 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1342 skip_bits(&s->gb, 8);
1343 skip_bits(&s->gb, 32);
1344 skip_bits(&s->gb, 32);
1352 if (id == AV_RL32("JFIF")) {
1353 int t_w, t_h, v1, v2;
1354 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1355 v1 = get_bits(&s->gb, 8);
1356 v2 = get_bits(&s->gb, 8);
1357 skip_bits(&s->gb, 8);
1359 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1360 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1362 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1363 av_log(s->avctx, AV_LOG_INFO,
1364 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1366 s->avctx->sample_aspect_ratio.num,
1367 s->avctx->sample_aspect_ratio.den);
1369 t_w = get_bits(&s->gb, 8);
1370 t_h = get_bits(&s->gb, 8);
1372 /* skip thumbnail */
1373 if (len -10 - (t_w * t_h * 3) > 0)
1374 len -= t_w * t_h * 3;
1380 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1381 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1382 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1383 skip_bits(&s->gb, 16); /* version */
1384 skip_bits(&s->gb, 16); /* flags0 */
1385 skip_bits(&s->gb, 16); /* flags1 */
1386 skip_bits(&s->gb, 8); /* transform */
1391 if (id == AV_RL32("LJIF")) {
1392 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1393 av_log(s->avctx, AV_LOG_INFO,
1394 "Pegasus lossless jpeg header found\n");
1395 skip_bits(&s->gb, 16); /* version ? */
1396 skip_bits(&s->gb, 16); /* unknwon always 0? */
1397 skip_bits(&s->gb, 16); /* unknwon always 0? */
1398 skip_bits(&s->gb, 16); /* unknwon always 0? */
1399 switch (get_bits(&s->gb, 8)) {
1409 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1416 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1417 id = get_bits_long(&s->gb, 32);
1418 id = av_be2ne32(id);
1421 if (id == AV_RL32("mjpg")) {
1423 skip_bits(&s->gb, 32); /* field size */
1424 skip_bits(&s->gb, 32); /* pad field size */
1425 skip_bits(&s->gb, 32); /* next off */
1426 skip_bits(&s->gb, 32); /* quant off */
1427 skip_bits(&s->gb, 32); /* huff off */
1428 skip_bits(&s->gb, 32); /* image off */
1429 skip_bits(&s->gb, 32); /* scan off */
1430 skip_bits(&s->gb, 32); /* data off */
1432 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1433 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1438 /* slow but needed for extreme adobe jpegs */
1440 av_log(s->avctx, AV_LOG_ERROR,
1441 "mjpeg: error, decode_app parser read over the end\n");
1443 skip_bits(&s->gb, 8);
1448 static int mjpeg_decode_com(MJpegDecodeContext *s)
1450 int len = get_bits(&s->gb, 16);
1451 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1452 char *cbuf = av_malloc(len - 1);
1455 for (i = 0; i < len - 2; i++)
1456 cbuf[i] = get_bits(&s->gb, 8);
1457 if (i > 0 && cbuf[i - 1] == '\n')
1462 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1463 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1465 /* buggy avid, it puts EOI only at every 10th frame */
1466 if (!strcmp(cbuf, "AVID")) {
1468 } else if (!strcmp(cbuf, "CS=ITU601"))
1470 else if ((len > 31 && !strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32)) ||
1471 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1481 /* return the 8 bit start code value and update the search
1482 state. Return -1 if no start code found */
1483 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1485 const uint8_t *buf_ptr;
1490 buf_ptr = *pbuf_ptr;
1491 while (buf_ptr < buf_end) {
1494 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1502 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1503 *pbuf_ptr = buf_ptr;
1507 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1508 const uint8_t **buf_ptr, const uint8_t *buf_end,
1509 const uint8_t **unescaped_buf_ptr,
1510 int *unescaped_buf_size)
1513 start_code = find_marker(buf_ptr, buf_end);
1515 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1517 return AVERROR(ENOMEM);
1519 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1520 if (start_code == SOS && !s->ls) {
1521 const uint8_t *src = *buf_ptr;
1522 uint8_t *dst = s->buffer;
1524 while (src < buf_end) {
1525 uint8_t x = *(src++);
1528 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1530 while (src < buf_end && x == 0xff)
1533 if (x >= 0xd0 && x <= 0xd7)
1540 *unescaped_buf_ptr = s->buffer;
1541 *unescaped_buf_size = dst - s->buffer;
1543 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1544 (buf_end - *buf_ptr) - (dst - s->buffer));
1545 } else if (start_code == SOS && s->ls) {
1546 const uint8_t *src = *buf_ptr;
1547 uint8_t *dst = s->buffer;
1555 while (src + t < buf_end) {
1556 uint8_t x = src[t++];
1558 while ((src + t < buf_end) && x == 0xff)
1567 init_put_bits(&pb, dst, t);
1569 /* unescape bitstream */
1571 uint8_t x = src[b++];
1572 put_bits(&pb, 8, x);
1575 put_bits(&pb, 7, x);
1579 flush_put_bits(&pb);
1581 *unescaped_buf_ptr = dst;
1582 *unescaped_buf_size = (bit_count + 7) >> 3;
1584 *unescaped_buf_ptr = *buf_ptr;
1585 *unescaped_buf_size = buf_end - *buf_ptr;
1591 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
1594 const uint8_t *buf = avpkt->data;
1595 int buf_size = avpkt->size;
1596 MJpegDecodeContext *s = avctx->priv_data;
1597 const uint8_t *buf_end, *buf_ptr;
1598 const uint8_t *unescaped_buf_ptr;
1599 int unescaped_buf_size;
1603 AVFrame *picture = data;
1605 s->got_picture = 0; // picture from previous image can not be reused
1607 buf_end = buf + buf_size;
1608 while (buf_ptr < buf_end) {
1609 /* find start next marker */
1610 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1612 &unescaped_buf_size);
1614 if (start_code < 0) {
1616 } else if (unescaped_buf_size > (1U<<28)) {
1617 av_log(avctx, AV_LOG_ERROR, "MJPEG packet 0x%x too big (0x%x/0x%x), corrupt data?\n",
1618 start_code, unescaped_buf_size, buf_size);
1619 return AVERROR_INVALIDDATA;
1621 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1622 start_code, buf_end - buf_ptr);
1624 init_get_bits(&s->gb, unescaped_buf_ptr, unescaped_buf_size * 8);
1626 s->start_code = start_code;
1627 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1628 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1630 /* process markers */
1631 if (start_code >= 0xd0 && start_code <= 0xd7)
1632 av_log(avctx, AV_LOG_DEBUG,
1633 "restart marker: %d\n", start_code & 0x0f);
1635 else if (start_code >= APP0 && start_code <= APP15)
1636 mjpeg_decode_app(s);
1638 else if (start_code == COM)
1639 mjpeg_decode_com(s);
1641 switch (start_code) {
1643 s->restart_interval = 0;
1644 s->restart_count = 0;
1645 /* nothing to do on SOI */
1648 ff_mjpeg_decode_dqt(s);
1651 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1652 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1661 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1668 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1675 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1682 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1686 if (!CONFIG_JPEGLS_DECODER ||
1687 (ret = ff_jpegls_decode_lse(s)) < 0)
1693 if (!s->got_picture) {
1694 av_log(avctx, AV_LOG_WARNING,
1695 "Found EOI before any SOF, ignoring\n");
1698 if (s->interlaced) {
1699 s->bottom_field ^= 1;
1700 /* if not bottom field, do not output image yet */
1701 if (s->bottom_field == !s->interlace_polarity)
1704 *picture = *s->picture_ptr;
1705 *data_size = sizeof(AVFrame);
1708 picture->quality = FFMAX3(s->qscale[0],
1711 picture->qstride = 0;
1712 picture->qscale_table = s->qscale_table;
1713 memset(picture->qscale_table, picture->quality,
1714 (s->width + 15) / 16);
1715 if (avctx->debug & FF_DEBUG_QP)
1716 av_log(avctx, AV_LOG_DEBUG,
1717 "QP: %d\n", picture->quality);
1718 picture->quality *= FF_QP2LAMBDA;
1723 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1724 (avctx->err_recognition & AV_EF_EXPLODE))
1728 mjpeg_decode_dri(s);
1740 av_log(avctx, AV_LOG_ERROR,
1741 "mjpeg: unsupported coding type (%x)\n", start_code);
1745 /* eof process start code */
1746 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1747 av_log(avctx, AV_LOG_DEBUG,
1748 "marker parser used %d bytes (%d bits)\n",
1749 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1752 if (s->got_picture) {
1753 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1756 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1757 return AVERROR_INVALIDDATA;
1760 uint8_t *line = s->picture_ptr->data[s->upscale_h];
1761 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
1762 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1763 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
1764 avctx->pix_fmt == AV_PIX_FMT_YUV440P);
1765 for (i = 0; i < s->chroma_height; i++) {
1766 for (index = s->width - 1; index; index--)
1767 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
1768 line += s->linesize[s->upscale_h];
1772 uint8_t *dst = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(s->height - 1) * s->linesize[s->upscale_v]];
1773 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
1774 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1775 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
1776 avctx->pix_fmt == AV_PIX_FMT_YUV422P);
1777 for (i = s->height - 1; i; i--) {
1778 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[i / 2 * s->linesize[s->upscale_v]];
1779 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(i + 1) / 2 * s->linesize[s->upscale_v]];
1781 memcpy(dst, src1, s->width);
1783 for (index = 0; index < s->width; index++)
1784 dst[index] = (src1[index] + src2[index]) >> 1;
1786 dst -= s->linesize[s->upscale_v];
1789 if (s->flipped && (s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
1790 int hshift, vshift, j;
1791 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
1792 for (index=0; index<4; index++) {
1793 uint8_t *dst = s->picture_ptr->data[index];
1796 if(index && index<3){
1797 w = -((-w) >> hshift);
1798 h = -((-h) >> vshift);
1801 uint8_t *dst2 = dst + s->linesize[index]*(h-1);
1802 for (i=0; i<h/2; i++) {
1804 FFSWAP(int, dst[j], dst2[j]);
1805 dst += s->linesize[index];
1806 dst2 -= s->linesize[index];
1812 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %td bytes\n",
1814 // return buf_end - buf_ptr;
1815 return buf_ptr - buf;
1818 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1820 MJpegDecodeContext *s = avctx->priv_data;
1823 if (s->picture_ptr && s->picture_ptr->data[0])
1824 avctx->release_buffer(avctx, s->picture_ptr);
1827 av_free(s->qscale_table);
1828 av_freep(&s->ljpeg_buffer);
1829 s->ljpeg_buffer_size = 0;
1831 for (i = 0; i < 3; i++) {
1832 for (j = 0; j < 4; j++)
1833 ff_free_vlc(&s->vlcs[i][j]);
1835 for (i = 0; i < MAX_COMPONENTS; i++) {
1836 av_freep(&s->blocks[i]);
1837 av_freep(&s->last_nnz[i]);
1842 #if CONFIG_MJPEG_DECODER
1843 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1844 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1845 static const AVOption options[] = {
1846 { "extern_huff", "Use external huffman table.",
1847 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
1851 static const AVClass mjpegdec_class = {
1852 .class_name = "MJPEG decoder",
1853 .item_name = av_default_item_name,
1855 .version = LIBAVUTIL_VERSION_INT,
1858 AVCodec ff_mjpeg_decoder = {
1860 .type = AVMEDIA_TYPE_VIDEO,
1861 .id = AV_CODEC_ID_MJPEG,
1862 .priv_data_size = sizeof(MJpegDecodeContext),
1863 .init = ff_mjpeg_decode_init,
1864 .close = ff_mjpeg_decode_end,
1865 .decode = ff_mjpeg_decode_frame,
1866 .capabilities = CODEC_CAP_DR1,
1868 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1869 .priv_class = &mjpegdec_class,
1872 #if CONFIG_THP_DECODER
1873 AVCodec ff_thp_decoder = {
1875 .type = AVMEDIA_TYPE_VIDEO,
1876 .id = AV_CODEC_ID_THP,
1877 .priv_data_size = sizeof(MJpegDecodeContext),
1878 .init = ff_mjpeg_decode_init,
1879 .close = ff_mjpeg_decode_end,
1880 .decode = ff_mjpeg_decode_frame,
1881 .capabilities = CODEC_CAP_DR1,
1883 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),