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"
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 av_assert0(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;
88 s->picture_ptr = &s->picture;
89 avcodec_get_frame_defaults(&s->picture);
92 ff_dsputil_init(&s->dsp, avctx);
93 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
99 s->org_height = avctx->coded_height;
100 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
102 build_basic_mjpeg_vlc(s);
104 if (s->extern_huff) {
105 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
106 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
107 if (ff_mjpeg_decode_dht(s)) {
108 av_log(avctx, AV_LOG_ERROR,
109 "error using external huffman table, switching back to internal\n");
110 build_basic_mjpeg_vlc(s);
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, "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 int pr = get_bits(&s->gb, 4);
134 av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
135 return AVERROR_INVALIDDATA;
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, pr ? 16 : 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;
215 int h_count[MAX_COMPONENTS];
216 int v_count[MAX_COMPONENTS];
219 s->upscale_h = s->upscale_v = 0;
221 /* XXX: verify len field validity */
222 len = get_bits(&s->gb, 16);
223 s->bits = get_bits(&s->gb, 8);
227 if (s->bits == 9 && !s->pegasus_rct)
228 s->rct = 1; // FIXME ugly
230 if (s->bits != 8 && !s->lossless) {
231 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
235 if(s->lossless && s->avctx->lowres){
236 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
240 height = get_bits(&s->gb, 16);
241 width = get_bits(&s->gb, 16);
243 // HACK for odd_height.mov
244 if (s->interlaced && s->width == width && s->height == height + 1)
247 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
248 if (av_image_check_size(width, height, 0, s->avctx))
249 return AVERROR_INVALIDDATA;
251 nb_components = get_bits(&s->gb, 8);
252 if (nb_components <= 0 ||
253 nb_components > MAX_COMPONENTS)
255 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
256 if (nb_components != s->nb_components) {
257 av_log(s->avctx, AV_LOG_ERROR, "nb_components changing in interlaced picture\n");
258 return AVERROR_INVALIDDATA;
261 if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
262 av_log_missing_feature(s->avctx,
263 "For JPEG-LS anything except <= 8 bits/component"
264 " or 16-bit gray", 0);
265 return AVERROR_PATCHWELCOME;
267 s->nb_components = nb_components;
270 memset(h_count, 0, sizeof(h_count));
271 memset(v_count, 0, sizeof(v_count));
272 for (i = 0; i < nb_components; i++) {
274 s->component_id[i] = get_bits(&s->gb, 8) - 1;
275 h_count[i] = get_bits(&s->gb, 4);
276 v_count[i] = get_bits(&s->gb, 4);
277 /* compute hmax and vmax (only used in interleaved case) */
278 if (h_count[i] > s->h_max)
279 s->h_max = h_count[i];
280 if (v_count[i] > s->v_max)
281 s->v_max = v_count[i];
282 if (!h_count[i] || !v_count[i]) {
283 av_log(s->avctx, AV_LOG_ERROR, "h/v_count is 0\n");
286 s->quant_index[i] = get_bits(&s->gb, 8);
287 if (s->quant_index[i] >= 4) {
288 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
289 return AVERROR_INVALIDDATA;
291 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
292 i, h_count[i], v_count[i],
293 s->component_id[i], s->quant_index[i]);
296 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
297 av_log_missing_feature(s->avctx, "Subsampling in JPEG-LS", 0);
298 return AVERROR_PATCHWELCOME;
301 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && nb_components==3)
303 else if (!s->lossless)
306 /* if different size, realloc/alloc picture */
307 if ( width != s->width || height != s->height
308 || memcmp(s->h_count, h_count, sizeof(h_count))
309 || memcmp(s->v_count, v_count, sizeof(v_count))) {
310 av_freep(&s->qscale_table);
314 memcpy(s->h_count, h_count, sizeof(h_count));
315 memcpy(s->v_count, v_count, sizeof(v_count));
319 /* test interlaced mode */
320 if (s->first_picture &&
321 s->org_height != 0 &&
322 s->height < ((s->org_height * 3) / 4)) {
324 s->bottom_field = s->interlace_polarity;
325 s->picture_ptr->interlaced_frame = 1;
326 s->picture_ptr->top_field_first = !s->interlace_polarity;
330 avcodec_set_dimensions(s->avctx, width, height);
332 s->qscale_table = av_mallocz((s->width + 15) / 16);
333 s->first_picture = 0;
336 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
337 if (s->progressive) {
338 av_log_ask_for_sample(s->avctx, "progressively coded interlaced pictures not supported\n");
339 return AVERROR_INVALIDDATA;
342 /* XXX: not complete test ! */
343 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
344 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
345 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
346 (s->h_count[3] << 4) | s->v_count[3];
347 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
348 /* NOTE we do not allocate pictures large enough for the possible
349 * padding of h/v_count being 4 */
350 if (!(pix_fmt_id & 0xD0D0D0D0))
351 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
352 if (!(pix_fmt_id & 0x0D0D0D0D))
353 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
355 switch (pix_fmt_id) {
358 s->avctx->pix_fmt = AV_PIX_FMT_BGR24;
360 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
361 s->avctx->pix_fmt = AV_PIX_FMT_GBR24P;
363 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
364 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
367 av_assert0(s->nb_components == 3);
371 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
372 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
374 s->upscale_h = (pix_fmt_id == 0x22122100);
375 s->chroma_height = s->height;
379 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
380 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
381 s->upscale_v = (pix_fmt_id == 0x22211200);
383 s->chroma_height = s->height;
386 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
387 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
390 s->chroma_height = s->height / 2;
402 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
404 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
409 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
410 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
411 s->upscale_h = (pix_fmt_id == 0x22211100) * 2 + (pix_fmt_id == 0x22112100);
412 s->chroma_height = s->height / 2;
415 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
416 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
420 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
421 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
422 s->upscale_v = (pix_fmt_id == 0x22121100) + 1;
425 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
426 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
429 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
430 return AVERROR_PATCHWELCOME;
432 if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
433 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
434 return AVERROR_PATCHWELCOME;
437 s->upscale_h = s->upscale_v = 0;
438 if (s->nb_components > 1)
439 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
440 else if (s->bits <= 8)
441 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
443 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
446 if (s->picture_ptr->data[0])
447 s->avctx->release_buffer(s->avctx, s->picture_ptr);
449 if (ff_get_buffer(s->avctx, s->picture_ptr) < 0) {
450 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
453 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
454 s->picture_ptr->key_frame = 1;
457 for (i = 0; i < 3; i++)
458 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
460 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
461 s->width, s->height, s->linesize[0], s->linesize[1],
462 s->interlaced, s->avctx->height);
464 if (len != (8 + (3 * nb_components)))
465 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
468 /* totally blank picture as progressive JPEG will only add details to it */
469 if (s->progressive) {
470 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
471 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
472 for (i = 0; i < s->nb_components; i++) {
473 int size = bw * bh * s->h_count[i] * s->v_count[i];
474 av_freep(&s->blocks[i]);
475 av_freep(&s->last_nnz[i]);
476 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
477 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
478 s->block_stride[i] = bw * s->h_count[i];
480 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
485 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
488 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
490 av_log(s->avctx, AV_LOG_WARNING,
491 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
492 0, dc_index, &s->vlcs[0][dc_index]);
497 return get_xbits(&s->gb, code);
502 /* decode block and dequantize */
503 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
504 int dc_index, int ac_index, int16_t *quant_matrix)
506 int code, i, j, level, val;
509 val = mjpeg_decode_dc(s, dc_index);
511 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
512 return AVERROR_INVALIDDATA;
514 val = val * quant_matrix[0] + s->last_dc[component];
515 s->last_dc[component] = val;
519 {OPEN_READER(re, &s->gb);
521 UPDATE_CACHE(re, &s->gb);
522 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
524 i += ((unsigned)code) >> 4;
527 if (code > MIN_CACHE_BITS - 16)
528 UPDATE_CACHE(re, &s->gb);
531 int cache = GET_CACHE(re, &s->gb);
532 int sign = (~cache) >> 31;
533 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
536 LAST_SKIP_BITS(re, &s->gb, code);
539 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
540 return AVERROR_INVALIDDATA;
542 j = s->scantable.permutated[i];
543 block[j] = level * quant_matrix[j];
546 CLOSE_READER(re, &s->gb);}
551 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
552 int component, int dc_index,
553 int16_t *quant_matrix, int Al)
556 s->dsp.clear_block(block);
557 val = mjpeg_decode_dc(s, dc_index);
559 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
560 return AVERROR_INVALIDDATA;
562 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
563 s->last_dc[component] = val;
568 /* decode block and dequantize - progressive JPEG version */
569 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
570 uint8_t *last_nnz, int ac_index,
571 int16_t *quant_matrix,
572 int ss, int se, int Al, int *EOBRUN)
574 int code, i, j, level, val, run;
582 OPEN_READER(re, &s->gb);
583 for (i = ss; ; i++) {
584 UPDATE_CACHE(re, &s->gb);
585 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
587 run = ((unsigned) code) >> 4;
591 if (code > MIN_CACHE_BITS - 16)
592 UPDATE_CACHE(re, &s->gb);
595 int cache = GET_CACHE(re, &s->gb);
596 int sign = (~cache) >> 31;
597 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
600 LAST_SKIP_BITS(re, &s->gb, code);
604 j = s->scantable.permutated[se];
605 block[j] = level * quant_matrix[j] << Al;
608 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
609 return AVERROR_INVALIDDATA;
611 j = s->scantable.permutated[i];
612 block[j] = level * quant_matrix[j] << Al;
614 if (run == 0xF) {// ZRL - skip 15 coefficients
617 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
618 return AVERROR_INVALIDDATA;
623 UPDATE_CACHE(re, &s->gb);
624 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
625 LAST_SKIP_BITS(re, &s->gb, run);
632 CLOSE_READER(re, &s->gb);
641 #define REFINE_BIT(j) { \
642 UPDATE_CACHE(re, &s->gb); \
643 sign = block[j] >> 15; \
644 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
645 ((quant_matrix[j] ^ sign) - sign) << Al; \
646 LAST_SKIP_BITS(re, &s->gb, 1); \
654 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
659 j = s->scantable.permutated[i]; \
662 else if (run-- == 0) \
666 /* decode block and dequantize - progressive JPEG refinement pass */
667 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
669 int ac_index, int16_t *quant_matrix,
670 int ss, int se, int Al, int *EOBRUN)
672 int code, i = ss, j, sign, val, run;
673 int last = FFMIN(se, *last_nnz);
675 OPEN_READER(re, &s->gb);
680 UPDATE_CACHE(re, &s->gb);
681 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
684 run = ((unsigned) code) >> 4;
685 UPDATE_CACHE(re, &s->gb);
686 val = SHOW_UBITS(re, &s->gb, 1);
687 LAST_SKIP_BITS(re, &s->gb, 1);
689 j = s->scantable.permutated[i];
691 block[j] = ((quant_matrix[j]^val) - val) << Al;
695 CLOSE_READER(re, &s->gb);
699 run = ((unsigned) code) >> 4;
706 UPDATE_CACHE(re, &s->gb);
707 run += SHOW_UBITS(re, &s->gb, val);
708 LAST_SKIP_BITS(re, &s->gb, val);
720 for (; i <= last; i++) {
721 j = s->scantable.permutated[i];
725 CLOSE_READER(re, &s->gb);
732 static void handle_rstn(MJpegDecodeContext *s, int nb_components)
735 if (s->restart_interval) {
737 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
738 align_get_bits(&s->gb);
739 for (i = 0; i < nb_components; i++) /* reset dc */
740 s->last_dc[i] = 1024;
743 i = 8 + ((-get_bits_count(&s->gb)) & 7);
745 if (s->restart_count == 0 && show_bits(&s->gb, i) == (1 << i) - 1) {
746 int pos = get_bits_count(&s->gb);
747 align_get_bits(&s->gb);
748 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
749 skip_bits(&s->gb, 8);
750 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
751 for (i = 0; i < nb_components; i++) /* reset dc */
752 s->last_dc[i] = 1024;
754 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
759 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
762 uint16_t (*buffer)[4];
763 int left[3], top[3], topleft[3];
764 const int linesize = s->linesize[0];
765 const int mask = (1 << s->bits) - 1;
769 s->restart_count = s->restart_interval;
771 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
772 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
773 buffer = s->ljpeg_buffer;
775 for (i = 0; i < 3; i++)
776 buffer[0][i] = 1 << (s->bits - 1);
778 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
779 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
781 if (s->interlaced && s->bottom_field)
782 ptr += linesize >> 1;
784 for (i = 0; i < 3; i++)
785 top[i] = left[i] = topleft[i] = buffer[0][i];
787 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
788 int modified_predictor = predictor;
790 if (s->restart_interval && !s->restart_count){
791 s->restart_count = s->restart_interval;
795 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
797 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
798 modified_predictor = 1;
800 for (i=0;i<nb_components;i++) {
804 top[i] = buffer[mb_x][i];
806 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
808 dc = mjpeg_decode_dc(s, s->dc_index[i]);
812 left[i] = buffer[mb_x][i] =
813 mask & (pred + (dc << point_transform));
816 if (s->restart_interval && !--s->restart_count) {
817 align_get_bits(&s->gb);
818 skip_bits(&s->gb, 16); /* skip RSTn */
823 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
824 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
825 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
826 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
828 } else if (s->pegasus_rct) {
829 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
830 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
831 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
832 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
835 for(i=0; i<nb_components; i++) {
836 int c= s->comp_index[i];
837 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
838 ptr[3*mb_x+2-c] = buffer[mb_x][i];
846 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
850 const int nb_components=s->nb_components;
851 int bits= (s->bits+7)&~7;
855 point_transform += bits - s->bits;
857 av_assert0(nb_components>=1 && nb_components<=3);
859 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
860 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
861 if (s->restart_interval && !s->restart_count){
862 s->restart_count = s->restart_interval;
867 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
868 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
869 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
870 for (i = 0; i < nb_components; i++) {
873 int n, h, v, x, y, c, j, linesize;
875 c = s->comp_index[i];
880 linesize= s->linesize[c];
882 if(bits>8) linesize /= 2;
887 dc = mjpeg_decode_dc(s, s->dc_index[i]);
891 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
894 pred= 1 << (bits - 1);
900 pred= ptr[-linesize];
902 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
906 if (s->interlaced && s->bottom_field)
907 ptr += linesize >> 1;
908 pred &= (-1)<<(8-s->bits);
909 *ptr= pred + (dc << point_transform);
911 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
914 pred= 1 << (bits - 1);
920 pred= ptr16[-linesize];
922 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
926 if (s->interlaced && s->bottom_field)
927 ptr16 += linesize >> 1;
928 pred &= (-1)<<(16-s->bits);
929 *ptr16= pred + (dc << point_transform);
938 for (i = 0; i < nb_components; i++) {
941 int n, h, v, x, y, c, j, linesize, dc;
943 c = s->comp_index[i];
948 linesize = s->linesize[c];
950 if(bits>8) linesize /= 2;
952 for (j = 0; j < n; j++) {
955 dc = mjpeg_decode_dc(s, s->dc_index[i]);
959 ptr = s->picture.data[c] +
960 (linesize * (v * mb_y + y)) +
961 (h * mb_x + x); //FIXME optimize this crap
962 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
964 pred &= (-1)<<(8-s->bits);
965 *ptr = pred + (dc << point_transform);
967 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
968 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
970 pred &= (-1)<<(16-s->bits);
971 *ptr16= pred + (dc << point_transform);
981 if (s->restart_interval && !--s->restart_count) {
982 align_get_bits(&s->gb);
983 skip_bits(&s->gb, 16); /* skip RSTn */
990 static av_always_inline void mjpeg_copy_block(uint8_t *dst, const uint8_t *src,
991 int linesize, int lowres)
994 case 0: copy_block8(dst, src, linesize, linesize, 8);
996 case 1: copy_block4(dst, src, linesize, linesize, 4);
998 case 2: copy_block2(dst, src, linesize, linesize, 2);
1000 case 3: *dst = *src;
1005 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1006 int Al, const uint8_t *mb_bitmask,
1007 const AVFrame *reference)
1010 uint8_t *data[MAX_COMPONENTS];
1011 const uint8_t *reference_data[MAX_COMPONENTS];
1012 int linesize[MAX_COMPONENTS];
1013 GetBitContext mb_bitmask_gb;
1016 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1018 if (s->flipped && s->avctx->lowres) {
1019 av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with lowres\n");
1023 for (i = 0; i < nb_components; i++) {
1024 int c = s->comp_index[i];
1025 data[c] = s->picture_ptr->data[c];
1026 reference_data[c] = reference ? reference->data[c] : NULL;
1027 linesize[c] = s->linesize[c];
1028 s->coefs_finished[c] |= 1;
1029 if (s->flipped && !(s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
1030 // picture should be flipped upside-down for this codec
1031 int offset = (linesize[c] * (s->v_scount[i] *
1032 (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
1034 reference_data[c] += offset;
1039 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1040 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1041 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1043 if (s->restart_interval && !s->restart_count)
1044 s->restart_count = s->restart_interval;
1046 if (get_bits_left(&s->gb) < 0) {
1047 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1048 -get_bits_left(&s->gb));
1049 return AVERROR_INVALIDDATA;
1051 for (i = 0; i < nb_components; i++) {
1053 int n, h, v, x, y, c, j;
1055 n = s->nb_blocks[i];
1056 c = s->comp_index[i];
1061 for (j = 0; j < n; j++) {
1062 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1063 (h * mb_x + x) * 8) >> s->avctx->lowres);
1065 if (s->interlaced && s->bottom_field)
1066 block_offset += linesize[c] >> 1;
1067 ptr = data[c] + block_offset;
1068 if (!s->progressive) {
1070 mjpeg_copy_block(ptr, reference_data[c] + block_offset,
1071 linesize[c], s->avctx->lowres);
1073 s->dsp.clear_block(s->block);
1074 if (decode_block(s, s->block, i,
1075 s->dc_index[i], s->ac_index[i],
1076 s->quant_matrixes[s->quant_index[c]]) < 0) {
1077 av_log(s->avctx, AV_LOG_ERROR,
1078 "error y=%d x=%d\n", mb_y, mb_x);
1079 return AVERROR_INVALIDDATA;
1081 s->dsp.idct_put(ptr, linesize[c], s->block);
1084 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1086 int16_t *block = s->blocks[c][block_idx];
1088 block[0] += get_bits1(&s->gb) *
1089 s->quant_matrixes[s->quant_index[c]][0] << Al;
1090 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1091 s->quant_matrixes[s->quant_index[c]],
1093 av_log(s->avctx, AV_LOG_ERROR,
1094 "error y=%d x=%d\n", mb_y, mb_x);
1095 return AVERROR_INVALIDDATA;
1098 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1099 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1100 mb_x, mb_y, x, y, c, s->bottom_field,
1101 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1109 handle_rstn(s, nb_components);
1115 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1116 int se, int Ah, int Al)
1120 int c = s->comp_index[0];
1121 uint8_t *data = s->picture.data[c];
1122 int linesize = s->linesize[c];
1124 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
1127 av_log(s->avctx, AV_LOG_ERROR, "SE %d is too large\n", se);
1128 return AVERROR_INVALIDDATA;
1132 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
1133 last_scan = !~s->coefs_finished[c];
1136 if (s->interlaced && s->bottom_field)
1137 data += linesize >> 1;
1139 s->restart_count = 0;
1141 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1142 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1143 int block_idx = mb_y * s->block_stride[c];
1144 int16_t (*block)[64] = &s->blocks[c][block_idx];
1145 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1146 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1148 if (s->restart_interval && !s->restart_count)
1149 s->restart_count = s->restart_interval;
1152 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1153 quant_matrix, ss, se, Al, &EOBRUN);
1155 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1156 quant_matrix, ss, se, Al, &EOBRUN);
1158 av_log(s->avctx, AV_LOG_ERROR,
1159 "error y=%d x=%d\n", mb_y, mb_x);
1160 return AVERROR_INVALIDDATA;
1164 s->dsp.idct_put(ptr, linesize, *block);
1165 ptr += 8 >> s->avctx->lowres;
1173 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1174 const AVFrame *reference)
1176 int len, nb_components, i, h, v, predictor, point_transform;
1178 const int block_size = s->lossless ? 1 : 8;
1179 int ilv, prev_shift;
1181 if (!s->got_picture) {
1182 av_log(s->avctx, AV_LOG_WARNING,
1183 "Can not process SOS before SOF, skipping\n");
1187 av_assert0(s->picture_ptr->data[0]);
1188 /* XXX: verify len field validity */
1189 len = get_bits(&s->gb, 16);
1190 nb_components = get_bits(&s->gb, 8);
1191 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1192 av_log(s->avctx, AV_LOG_ERROR,
1193 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1194 return AVERROR_PATCHWELCOME;
1196 if (len != 6 + 2 * nb_components) {
1197 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1198 return AVERROR_INVALIDDATA;
1200 for (i = 0; i < nb_components; i++) {
1201 id = get_bits(&s->gb, 8) - 1;
1202 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1203 /* find component index */
1204 for (index = 0; index < s->nb_components; index++)
1205 if (id == s->component_id[index])
1207 if (index == s->nb_components) {
1208 av_log(s->avctx, AV_LOG_ERROR,
1209 "decode_sos: index(%d) out of components\n", index);
1210 return AVERROR_INVALIDDATA;
1212 /* Metasoft MJPEG codec has Cb and Cr swapped */
1213 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1214 && nb_components == 3 && s->nb_components == 3 && i)
1217 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1219 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1220 index = (index+2)%3;
1222 s->comp_index[i] = index;
1224 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1225 s->h_scount[i] = s->h_count[index];
1226 s->v_scount[i] = s->v_count[index];
1228 s->dc_index[i] = get_bits(&s->gb, 4);
1229 s->ac_index[i] = get_bits(&s->gb, 4);
1231 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1232 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1234 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))
1238 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1239 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1240 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1241 prev_shift = get_bits(&s->gb, 4); /* Ah */
1242 point_transform = get_bits(&s->gb, 4); /* Al */
1244 prev_shift = point_transform = 0;
1246 if (nb_components > 1) {
1247 /* interleaved stream */
1248 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1249 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1250 } else if (!s->ls) { /* skip this for JPEG-LS */
1251 h = s->h_max / s->h_scount[0];
1252 v = s->v_max / s->v_scount[0];
1253 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1254 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1255 s->nb_blocks[0] = 1;
1260 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1261 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1262 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1263 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1264 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1267 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1268 for (i = s->mjpb_skiptosod; i > 0; i--)
1269 skip_bits(&s->gb, 8);
1272 for (i = 0; i < nb_components; i++)
1273 s->last_dc[i] = 1024;
1276 av_assert0(s->picture_ptr == &s->picture);
1277 if (CONFIG_JPEGLS_DECODER && s->ls) {
1279 // reset_ls_coding_parameters(s, 0);
1281 if ((ret = ff_jpegls_decode_picture(s, predictor,
1282 point_transform, ilv)) < 0)
1286 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1289 if ((ret = ljpeg_decode_yuv_scan(s, predictor, point_transform)) < 0)
1294 if (s->progressive && predictor) {
1295 av_assert0(s->picture_ptr == &s->picture);
1296 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1298 point_transform)) < 0)
1301 if ((ret = mjpeg_decode_scan(s, nb_components,
1302 prev_shift, point_transform,
1303 mb_bitmask, reference)) < 0)
1308 if (s->interlaced &&
1309 get_bits_left(&s->gb) > 32 &&
1310 show_bits(&s->gb, 8) == 0xFF) {
1311 GetBitContext bak = s->gb;
1312 align_get_bits(&bak);
1313 if (show_bits(&bak, 16) == 0xFFD1) {
1314 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1316 skip_bits(&s->gb, 16);
1317 s->bottom_field ^= 1;
1326 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1327 return AVERROR_INVALIDDATA;
1330 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1332 if (get_bits(&s->gb, 16) != 4)
1333 return AVERROR_INVALIDDATA;
1334 s->restart_interval = get_bits(&s->gb, 16);
1335 s->restart_count = 0;
1336 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1337 s->restart_interval);
1342 static int mjpeg_decode_app(MJpegDecodeContext *s)
1346 len = get_bits(&s->gb, 16);
1348 return AVERROR_INVALIDDATA;
1349 if (8 * len > get_bits_left(&s->gb))
1350 return AVERROR_INVALIDDATA;
1352 id = get_bits_long(&s->gb, 32);
1353 id = av_be2ne32(id);
1356 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1357 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1359 /* Buggy AVID, it puts EOI only at every 10th frame. */
1360 /* Also, this fourcc is used by non-avid files too, it holds some
1361 information, but it's always present in AVID-created files. */
1362 if (id == AV_RL32("AVI1")) {
1368 4bytes field_size_less_padding
1371 i = get_bits(&s->gb, 8); len--;
1372 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1374 skip_bits(&s->gb, 8);
1375 skip_bits(&s->gb, 32);
1376 skip_bits(&s->gb, 32);
1384 if (id == AV_RL32("JFIF")) {
1385 int t_w, t_h, v1, v2;
1386 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1387 v1 = get_bits(&s->gb, 8);
1388 v2 = get_bits(&s->gb, 8);
1389 skip_bits(&s->gb, 8);
1391 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1392 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1394 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1395 av_log(s->avctx, AV_LOG_INFO,
1396 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1398 s->avctx->sample_aspect_ratio.num,
1399 s->avctx->sample_aspect_ratio.den);
1401 t_w = get_bits(&s->gb, 8);
1402 t_h = get_bits(&s->gb, 8);
1404 /* skip thumbnail */
1405 if (len -10 - (t_w * t_h * 3) > 0)
1406 len -= t_w * t_h * 3;
1412 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1413 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1414 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1415 skip_bits(&s->gb, 16); /* version */
1416 skip_bits(&s->gb, 16); /* flags0 */
1417 skip_bits(&s->gb, 16); /* flags1 */
1418 skip_bits(&s->gb, 8); /* transform */
1423 if (id == AV_RL32("LJIF")) {
1424 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1425 av_log(s->avctx, AV_LOG_INFO,
1426 "Pegasus lossless jpeg header found\n");
1427 skip_bits(&s->gb, 16); /* version ? */
1428 skip_bits(&s->gb, 16); /* unknown always 0? */
1429 skip_bits(&s->gb, 16); /* unknown always 0? */
1430 skip_bits(&s->gb, 16); /* unknown always 0? */
1431 switch (get_bits(&s->gb, 8)) {
1441 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1448 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1449 id = get_bits_long(&s->gb, 32);
1450 id = av_be2ne32(id);
1453 if (id == AV_RL32("mjpg")) {
1455 skip_bits(&s->gb, 32); /* field size */
1456 skip_bits(&s->gb, 32); /* pad field size */
1457 skip_bits(&s->gb, 32); /* next off */
1458 skip_bits(&s->gb, 32); /* quant off */
1459 skip_bits(&s->gb, 32); /* huff off */
1460 skip_bits(&s->gb, 32); /* image off */
1461 skip_bits(&s->gb, 32); /* scan off */
1462 skip_bits(&s->gb, 32); /* data off */
1464 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1465 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1470 /* slow but needed for extreme adobe jpegs */
1472 av_log(s->avctx, AV_LOG_ERROR,
1473 "mjpeg: error, decode_app parser read over the end\n");
1475 skip_bits(&s->gb, 8);
1480 static int mjpeg_decode_com(MJpegDecodeContext *s)
1482 int len = get_bits(&s->gb, 16);
1483 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1484 char *cbuf = av_malloc(len - 1);
1487 for (i = 0; i < len - 2; i++)
1488 cbuf[i] = get_bits(&s->gb, 8);
1489 if (i > 0 && cbuf[i - 1] == '\n')
1494 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1495 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1497 /* buggy avid, it puts EOI only at every 10th frame */
1498 if (!strcmp(cbuf, "AVID")) {
1500 } else if (!strcmp(cbuf, "CS=ITU601"))
1502 else if ((len > 31 && !strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32)) ||
1503 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1513 /* return the 8 bit start code value and update the search
1514 state. Return -1 if no start code found */
1515 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1517 const uint8_t *buf_ptr;
1522 buf_ptr = *pbuf_ptr;
1523 while (buf_ptr < buf_end) {
1526 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1534 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1535 *pbuf_ptr = buf_ptr;
1539 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1540 const uint8_t **buf_ptr, const uint8_t *buf_end,
1541 const uint8_t **unescaped_buf_ptr,
1542 int *unescaped_buf_size)
1545 start_code = find_marker(buf_ptr, buf_end);
1547 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1549 return AVERROR(ENOMEM);
1551 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1552 if (start_code == SOS && !s->ls) {
1553 const uint8_t *src = *buf_ptr;
1554 uint8_t *dst = s->buffer;
1556 while (src < buf_end) {
1557 uint8_t x = *(src++);
1560 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1562 while (src < buf_end && x == 0xff)
1565 if (x >= 0xd0 && x <= 0xd7)
1572 *unescaped_buf_ptr = s->buffer;
1573 *unescaped_buf_size = dst - s->buffer;
1574 memset(s->buffer + *unescaped_buf_size, 0,
1575 FF_INPUT_BUFFER_PADDING_SIZE);
1577 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1578 (buf_end - *buf_ptr) - (dst - s->buffer));
1579 } else if (start_code == SOS && s->ls) {
1580 const uint8_t *src = *buf_ptr;
1581 uint8_t *dst = s->buffer;
1589 while (src + t < buf_end) {
1590 uint8_t x = src[t++];
1592 while ((src + t < buf_end) && x == 0xff)
1601 init_put_bits(&pb, dst, t);
1603 /* unescape bitstream */
1605 uint8_t x = src[b++];
1606 put_bits(&pb, 8, x);
1609 put_bits(&pb, 7, x);
1613 flush_put_bits(&pb);
1615 *unescaped_buf_ptr = dst;
1616 *unescaped_buf_size = (bit_count + 7) >> 3;
1617 memset(s->buffer + *unescaped_buf_size, 0,
1618 FF_INPUT_BUFFER_PADDING_SIZE);
1620 *unescaped_buf_ptr = *buf_ptr;
1621 *unescaped_buf_size = buf_end - *buf_ptr;
1627 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1630 const uint8_t *buf = avpkt->data;
1631 int buf_size = avpkt->size;
1632 MJpegDecodeContext *s = avctx->priv_data;
1633 const uint8_t *buf_end, *buf_ptr;
1634 const uint8_t *unescaped_buf_ptr;
1635 int unescaped_buf_size;
1639 AVFrame *picture = data;
1642 buf_end = buf + buf_size;
1643 while (buf_ptr < buf_end) {
1644 /* find start next marker */
1645 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1647 &unescaped_buf_size);
1649 if (start_code < 0) {
1651 } else if (unescaped_buf_size > (1U<<28)) {
1652 av_log(avctx, AV_LOG_ERROR, "MJPEG packet 0x%x too big (0x%x/0x%x), corrupt data?\n",
1653 start_code, unescaped_buf_size, buf_size);
1654 return AVERROR_INVALIDDATA;
1656 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1657 start_code, buf_end - buf_ptr);
1659 init_get_bits(&s->gb, unescaped_buf_ptr, unescaped_buf_size * 8);
1661 s->start_code = start_code;
1662 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1663 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1665 /* process markers */
1666 if (start_code >= 0xd0 && start_code <= 0xd7)
1667 av_log(avctx, AV_LOG_DEBUG,
1668 "restart marker: %d\n", start_code & 0x0f);
1670 else if (start_code >= APP0 && start_code <= APP15)
1671 mjpeg_decode_app(s);
1673 else if (start_code == COM)
1674 mjpeg_decode_com(s);
1677 switch (start_code) {
1679 s->restart_interval = 0;
1680 s->restart_count = 0;
1681 /* nothing to do on SOI */
1684 ff_mjpeg_decode_dqt(s);
1687 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1688 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1697 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1704 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1711 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1718 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1722 if (!CONFIG_JPEGLS_DECODER ||
1723 (ret = ff_jpegls_decode_lse(s)) < 0)
1729 if (!s->got_picture) {
1730 av_log(avctx, AV_LOG_WARNING,
1731 "Found EOI before any SOF, ignoring\n");
1734 if (s->interlaced) {
1735 s->bottom_field ^= 1;
1736 /* if not bottom field, do not output image yet */
1737 if (s->bottom_field == !s->interlace_polarity)
1740 *picture = *s->picture_ptr;
1745 picture->quality = FFMAX3(s->qscale[0],
1748 picture->qstride = 0;
1749 picture->qscale_table = s->qscale_table;
1750 memset(picture->qscale_table, picture->quality,
1751 (s->width + 15) / 16);
1752 if (avctx->debug & FF_DEBUG_QP)
1753 av_log(avctx, AV_LOG_DEBUG,
1754 "QP: %d\n", picture->quality);
1755 picture->quality *= FF_QP2LAMBDA;
1760 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1761 (avctx->err_recognition & AV_EF_EXPLODE))
1765 mjpeg_decode_dri(s);
1777 av_log(avctx, AV_LOG_ERROR,
1778 "mjpeg: unsupported coding type (%x)\n", start_code);
1782 /* eof process start code */
1783 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1784 av_log(avctx, AV_LOG_DEBUG,
1785 "marker parser used %d bytes (%d bits)\n",
1786 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1789 if (s->got_picture) {
1790 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1793 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1794 return AVERROR_INVALIDDATA;
1800 uint8_t *line = s->picture_ptr->data[s->upscale_h];
1801 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
1802 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1803 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
1804 avctx->pix_fmt == AV_PIX_FMT_YUV440P);
1805 for (i = 0; i < s->chroma_height; i++) {
1806 for (index = s->width - 1; index; index--)
1807 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
1808 line += s->linesize[s->upscale_h];
1812 uint8_t *dst = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(s->height - 1) * s->linesize[s->upscale_v]];
1813 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
1814 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1815 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
1816 avctx->pix_fmt == AV_PIX_FMT_YUV422P);
1817 for (i = s->height - 1; i; i--) {
1818 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[i / 2 * s->linesize[s->upscale_v]];
1819 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(i + 1) / 2 * s->linesize[s->upscale_v]];
1821 memcpy(dst, src1, s->width);
1823 for (index = 0; index < s->width; index++)
1824 dst[index] = (src1[index] + src2[index]) >> 1;
1826 dst -= s->linesize[s->upscale_v];
1829 if (s->flipped && (s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
1830 int hshift, vshift, j;
1831 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
1832 for (index=0; index<4; index++) {
1833 uint8_t *dst = s->picture_ptr->data[index];
1836 if(index && index<3){
1837 w = -((-w) >> hshift);
1838 h = -((-h) >> vshift);
1841 uint8_t *dst2 = dst + s->linesize[index]*(h-1);
1842 for (i=0; i<h/2; i++) {
1844 FFSWAP(int, dst[j], dst2[j]);
1845 dst += s->linesize[index];
1846 dst2 -= s->linesize[index];
1852 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %td bytes\n",
1854 // return buf_end - buf_ptr;
1855 return buf_ptr - buf;
1858 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1860 MJpegDecodeContext *s = avctx->priv_data;
1863 if (s->picture_ptr && s->picture_ptr->data[0])
1864 avctx->release_buffer(avctx, s->picture_ptr);
1867 av_free(s->qscale_table);
1868 av_freep(&s->ljpeg_buffer);
1869 s->ljpeg_buffer_size = 0;
1871 for (i = 0; i < 3; i++) {
1872 for (j = 0; j < 4; j++)
1873 ff_free_vlc(&s->vlcs[i][j]);
1875 for (i = 0; i < MAX_COMPONENTS; i++) {
1876 av_freep(&s->blocks[i]);
1877 av_freep(&s->last_nnz[i]);
1882 static void decode_flush(AVCodecContext *avctx)
1884 MJpegDecodeContext *s = avctx->priv_data;
1888 #if CONFIG_MJPEG_DECODER
1889 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1890 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1891 static const AVOption options[] = {
1892 { "extern_huff", "Use external huffman table.",
1893 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
1897 static const AVClass mjpegdec_class = {
1898 .class_name = "MJPEG decoder",
1899 .item_name = av_default_item_name,
1901 .version = LIBAVUTIL_VERSION_INT,
1904 AVCodec ff_mjpeg_decoder = {
1906 .type = AVMEDIA_TYPE_VIDEO,
1907 .id = AV_CODEC_ID_MJPEG,
1908 .priv_data_size = sizeof(MJpegDecodeContext),
1909 .init = ff_mjpeg_decode_init,
1910 .close = ff_mjpeg_decode_end,
1911 .decode = ff_mjpeg_decode_frame,
1912 .flush = decode_flush,
1913 .capabilities = CODEC_CAP_DR1,
1915 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1916 .priv_class = &mjpegdec_class,
1919 #if CONFIG_THP_DECODER
1920 AVCodec ff_thp_decoder = {
1922 .type = AVMEDIA_TYPE_VIDEO,
1923 .id = AV_CODEC_ID_THP,
1924 .priv_data_size = sizeof(MJpegDecodeContext),
1925 .init = ff_mjpeg_decode_init,
1926 .close = ff_mjpeg_decode_end,
1927 .decode = ff_mjpeg_decode_frame,
1928 .flush = decode_flush,
1929 .capabilities = CODEC_CAP_DR1,
1931 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),