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"
37 #include "copy_block.h"
41 #include "jpeglsdec.h"
44 #include "bytestream.h"
47 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
48 const uint8_t *val_table, int nb_codes,
49 int use_static, int is_ac)
51 uint8_t huff_size[256] = { 0 };
52 uint16_t huff_code[256];
53 uint16_t huff_sym[256];
56 av_assert0(nb_codes <= 256);
58 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
60 for (i = 0; i < 256; i++)
61 huff_sym[i] = i + 16 * is_ac;
64 huff_sym[0] = 16 * 256;
66 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
67 huff_code, 2, 2, huff_sym, 2, 2, use_static);
70 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
72 build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
73 avpriv_mjpeg_val_dc, 12, 0, 0);
74 build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
75 avpriv_mjpeg_val_dc, 12, 0, 0);
76 build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
77 avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
78 build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
79 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
80 build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
81 avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
82 build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
83 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
86 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
88 MJpegDecodeContext *s = avctx->priv_data;
91 s->picture_ptr = &s->picture;
92 avcodec_get_frame_defaults(&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;
103 s->org_height = avctx->coded_height;
104 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
106 build_basic_mjpeg_vlc(s);
108 if (s->extern_huff) {
109 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
110 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
111 if (ff_mjpeg_decode_dht(s)) {
112 av_log(avctx, AV_LOG_ERROR,
113 "error using external huffman table, switching back to internal\n");
114 build_basic_mjpeg_vlc(s);
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, "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 int pr = get_bits(&s->gb, 4);
138 av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
139 return AVERROR_INVALIDDATA;
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, pr ? 16 : 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;
219 int h_count[MAX_COMPONENTS];
220 int v_count[MAX_COMPONENTS];
223 s->upscale_h = s->upscale_v = 0;
225 /* XXX: verify len field validity */
226 len = get_bits(&s->gb, 16);
227 s->avctx->bits_per_raw_sample =
228 s->bits = get_bits(&s->gb, 8);
232 if (s->bits == 9 && !s->pegasus_rct)
233 s->rct = 1; // FIXME ugly
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,
258 "nb_components changing in interlaced picture\n");
259 return AVERROR_INVALIDDATA;
262 if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
263 avpriv_report_missing_feature(s->avctx,
264 "JPEG-LS that is not <= 8 "
265 "bits/component or 16-bit gray");
266 return AVERROR_PATCHWELCOME;
268 s->nb_components = nb_components;
271 memset(h_count, 0, sizeof(h_count));
272 memset(v_count, 0, sizeof(v_count));
273 for (i = 0; i < nb_components; i++) {
275 s->component_id[i] = get_bits(&s->gb, 8) - 1;
276 h_count[i] = get_bits(&s->gb, 4);
277 v_count[i] = get_bits(&s->gb, 4);
278 /* compute hmax and vmax (only used in interleaved case) */
279 if (h_count[i] > s->h_max)
280 s->h_max = h_count[i];
281 if (v_count[i] > s->v_max)
282 s->v_max = v_count[i];
283 s->quant_index[i] = get_bits(&s->gb, 8);
284 if (s->quant_index[i] >= 4) {
285 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
286 return AVERROR_INVALIDDATA;
288 if (!h_count[i] || !v_count[i]) {
289 av_log(s->avctx, AV_LOG_ERROR,
290 "Invalid sampling factor in component %d %d:%d\n",
291 i, h_count[i], v_count[i]);
292 return AVERROR_INVALIDDATA;
295 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
296 i, h_count[i], v_count[i],
297 s->component_id[i], s->quant_index[i]);
300 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
301 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
302 return AVERROR_PATCHWELCOME;
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))) {
313 memcpy(s->h_count, h_count, sizeof(h_count));
314 memcpy(s->v_count, v_count, sizeof(v_count));
318 /* test interlaced mode */
319 if (s->first_picture &&
320 s->org_height != 0 &&
321 s->height < ((s->org_height * 3) / 4)) {
323 s->bottom_field = s->interlace_polarity;
324 s->picture_ptr->interlaced_frame = 1;
325 s->picture_ptr->top_field_first = !s->interlace_polarity;
329 ret = ff_set_dimensions(s->avctx, width, height);
333 s->first_picture = 0;
336 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
337 if (s->progressive) {
338 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
339 return AVERROR_INVALIDDATA;
342 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
344 else if (!s->lossless)
346 /* XXX: not complete test ! */
347 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
348 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
349 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
350 (s->h_count[3] << 4) | s->v_count[3];
351 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
352 /* NOTE we do not allocate pictures large enough for the possible
353 * padding of h/v_count being 4 */
354 if (!(pix_fmt_id & 0xD0D0D0D0))
355 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
356 if (!(pix_fmt_id & 0x0D0D0D0D))
357 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
359 switch (pix_fmt_id) {
362 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
364 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
365 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
367 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
368 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
369 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
372 av_assert0(s->nb_components == 3);
376 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
378 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
379 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
381 av_assert0(s->nb_components == 4);
385 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
388 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
390 s->upscale_h = (pix_fmt_id == 0x22122100);
391 s->chroma_height = s->height;
395 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
398 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
399 s->upscale_v = (pix_fmt_id == 0x22211200);
401 s->chroma_height = s->height;
404 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
407 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
410 s->chroma_height = s->height / 2;
422 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
424 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
429 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
432 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
433 s->upscale_h = (pix_fmt_id == 0x22211100) * 2 + (pix_fmt_id == 0x22112100);
434 s->chroma_height = s->height / 2;
437 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
438 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
439 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
443 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
446 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
447 s->upscale_v = (pix_fmt_id == 0x22121100) + 1;
450 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
451 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
452 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
455 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
458 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
462 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
463 return AVERROR_PATCHWELCOME;
465 if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
466 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
467 return AVERROR_PATCHWELCOME;
470 s->upscale_h = s->upscale_v = 0;
471 if (s->nb_components > 1)
472 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
473 else if (s->bits <= 8)
474 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
476 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
479 av_frame_unref(s->picture_ptr);
480 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
482 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
483 s->picture_ptr->key_frame = 1;
486 for (i = 0; i < 3; i++)
487 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
489 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
490 s->width, s->height, s->linesize[0], s->linesize[1],
491 s->interlaced, s->avctx->height);
493 if (len != (8 + (3 * nb_components)))
494 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
497 if (s->rgb && !s->lossless && !s->ls) {
498 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
499 return AVERROR_PATCHWELCOME;
502 /* totally blank picture as progressive JPEG will only add details to it */
503 if (s->progressive) {
504 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
505 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
506 for (i = 0; i < s->nb_components; i++) {
507 int size = bw * bh * s->h_count[i] * s->v_count[i];
508 av_freep(&s->blocks[i]);
509 av_freep(&s->last_nnz[i]);
510 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
511 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
512 if (!s->blocks[i] || !s->last_nnz[i])
513 return AVERROR(ENOMEM);
514 s->block_stride[i] = bw * s->h_count[i];
516 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
521 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
524 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
525 if (code < 0 || code > 16) {
526 av_log(s->avctx, AV_LOG_WARNING,
527 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
528 0, dc_index, &s->vlcs[0][dc_index]);
533 return get_xbits(&s->gb, code);
538 /* decode block and dequantize */
539 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
540 int dc_index, int ac_index, int16_t *quant_matrix)
542 int code, i, j, level, val;
545 val = mjpeg_decode_dc(s, dc_index);
546 if (val == 0xfffff) {
547 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
548 return AVERROR_INVALIDDATA;
550 val = val * quant_matrix[0] + s->last_dc[component];
551 s->last_dc[component] = val;
555 {OPEN_READER(re, &s->gb);
557 UPDATE_CACHE(re, &s->gb);
558 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
560 i += ((unsigned)code) >> 4;
563 if (code > MIN_CACHE_BITS - 16)
564 UPDATE_CACHE(re, &s->gb);
567 int cache = GET_CACHE(re, &s->gb);
568 int sign = (~cache) >> 31;
569 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
572 LAST_SKIP_BITS(re, &s->gb, code);
575 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
576 return AVERROR_INVALIDDATA;
578 j = s->scantable.permutated[i];
579 block[j] = level * quant_matrix[j];
582 CLOSE_READER(re, &s->gb);}
587 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
588 int component, int dc_index,
589 int16_t *quant_matrix, int Al)
592 s->dsp.clear_block(block);
593 val = mjpeg_decode_dc(s, dc_index);
594 if (val == 0xfffff) {
595 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
596 return AVERROR_INVALIDDATA;
598 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
599 s->last_dc[component] = val;
604 /* decode block and dequantize - progressive JPEG version */
605 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
606 uint8_t *last_nnz, int ac_index,
607 int16_t *quant_matrix,
608 int ss, int se, int Al, int *EOBRUN)
610 int code, i, j, level, val, run;
618 OPEN_READER(re, &s->gb);
619 for (i = ss; ; i++) {
620 UPDATE_CACHE(re, &s->gb);
621 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
623 run = ((unsigned) code) >> 4;
627 if (code > MIN_CACHE_BITS - 16)
628 UPDATE_CACHE(re, &s->gb);
631 int cache = GET_CACHE(re, &s->gb);
632 int sign = (~cache) >> 31;
633 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
636 LAST_SKIP_BITS(re, &s->gb, code);
640 j = s->scantable.permutated[se];
641 block[j] = level * quant_matrix[j] << Al;
644 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
645 return AVERROR_INVALIDDATA;
647 j = s->scantable.permutated[i];
648 block[j] = level * quant_matrix[j] << Al;
650 if (run == 0xF) {// ZRL - skip 15 coefficients
653 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
654 return AVERROR_INVALIDDATA;
659 UPDATE_CACHE(re, &s->gb);
660 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
661 LAST_SKIP_BITS(re, &s->gb, run);
668 CLOSE_READER(re, &s->gb);
677 #define REFINE_BIT(j) { \
678 UPDATE_CACHE(re, &s->gb); \
679 sign = block[j] >> 15; \
680 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
681 ((quant_matrix[j] ^ sign) - sign) << Al; \
682 LAST_SKIP_BITS(re, &s->gb, 1); \
690 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
695 j = s->scantable.permutated[i]; \
698 else if (run-- == 0) \
702 /* decode block and dequantize - progressive JPEG refinement pass */
703 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
705 int ac_index, int16_t *quant_matrix,
706 int ss, int se, int Al, int *EOBRUN)
708 int code, i = ss, j, sign, val, run;
709 int last = FFMIN(se, *last_nnz);
711 OPEN_READER(re, &s->gb);
716 UPDATE_CACHE(re, &s->gb);
717 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
720 run = ((unsigned) code) >> 4;
721 UPDATE_CACHE(re, &s->gb);
722 val = SHOW_UBITS(re, &s->gb, 1);
723 LAST_SKIP_BITS(re, &s->gb, 1);
725 j = s->scantable.permutated[i];
727 block[j] = ((quant_matrix[j]^val) - val) << Al;
731 CLOSE_READER(re, &s->gb);
735 run = ((unsigned) code) >> 4;
742 UPDATE_CACHE(re, &s->gb);
743 run += SHOW_UBITS(re, &s->gb, val);
744 LAST_SKIP_BITS(re, &s->gb, val);
756 for (; i <= last; i++) {
757 j = s->scantable.permutated[i];
761 CLOSE_READER(re, &s->gb);
768 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
773 if (s->restart_interval) {
775 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
776 align_get_bits(&s->gb);
777 for (i = 0; i < nb_components; i++) /* reset dc */
778 s->last_dc[i] = (4 << s->bits);
781 i = 8 + ((-get_bits_count(&s->gb)) & 7);
783 if (s->restart_count == 0) {
784 if( show_bits(&s->gb, i) == (1 << i) - 1
785 || show_bits(&s->gb, i) == 0xFF) {
786 int pos = get_bits_count(&s->gb);
787 align_get_bits(&s->gb);
788 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
789 skip_bits(&s->gb, 8);
790 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
791 for (i = 0; i < nb_components; i++) /* reset dc */
792 s->last_dc[i] = (4 << s->bits);
795 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
802 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
805 uint16_t (*buffer)[4];
806 int left[4], top[4], topleft[4];
807 const int linesize = s->linesize[0];
808 const int mask = ((1 << s->bits) - 1) << point_transform;
812 if (s->nb_components != 3 && s->nb_components != 4)
813 return AVERROR_INVALIDDATA;
814 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
815 return AVERROR_INVALIDDATA;
818 s->restart_count = s->restart_interval;
820 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
821 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
822 buffer = s->ljpeg_buffer;
824 for (i = 0; i < 4; i++)
825 buffer[0][i] = 1 << (s->bits - 1);
827 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
828 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
830 if (s->interlaced && s->bottom_field)
831 ptr += linesize >> 1;
833 for (i = 0; i < 4; i++)
834 top[i] = left[i] = topleft[i] = buffer[0][i];
836 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
837 int modified_predictor = predictor;
839 if (s->restart_interval && !s->restart_count){
840 s->restart_count = s->restart_interval;
844 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
846 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
847 modified_predictor = 1;
849 for (i=0;i<nb_components;i++) {
853 top[i] = buffer[mb_x][i];
855 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
857 dc = mjpeg_decode_dc(s, s->dc_index[i]);
861 left[i] = buffer[mb_x][i] =
862 mask & (pred + (dc << point_transform));
865 if (s->restart_interval && !--s->restart_count) {
866 align_get_bits(&s->gb);
867 skip_bits(&s->gb, 16); /* skip RSTn */
870 if (s->nb_components == 4) {
871 for(i=0; i<nb_components; i++) {
872 int c= s->comp_index[i];
874 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
875 ptr[4*mb_x+3-c] = buffer[mb_x][i];
877 } else if(s->bits == 9) {
878 return AVERROR_PATCHWELCOME;
880 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
881 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
886 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
887 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
888 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
889 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
891 } else if (s->pegasus_rct) {
892 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
893 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
894 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
895 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
898 for(i=0; i<nb_components; i++) {
899 int c= s->comp_index[i];
901 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
902 ptr[3*mb_x+2-c] = buffer[mb_x][i];
904 } else if(s->bits == 9) {
905 return AVERROR_PATCHWELCOME;
907 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
908 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
917 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
918 int point_transform, int nb_components)
920 int i, mb_x, mb_y, mask;
921 int bits= (s->bits+7)&~7;
925 point_transform += bits - s->bits;
926 mask = ((1 << s->bits) - 1) << point_transform;
928 av_assert0(nb_components>=1 && nb_components<=4);
930 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
931 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
932 if (s->restart_interval && !s->restart_count){
933 s->restart_count = s->restart_interval;
938 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
939 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
940 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
941 for (i = 0; i < nb_components; i++) {
944 int n, h, v, x, y, c, j, linesize;
946 c = s->comp_index[i];
951 linesize= s->linesize[c];
953 if(bits>8) linesize /= 2;
958 dc = mjpeg_decode_dc(s, s->dc_index[i]);
962 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
965 pred= 1 << (bits - 1);
971 pred= ptr[-linesize];
973 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
977 if (s->interlaced && s->bottom_field)
978 ptr += linesize >> 1;
980 *ptr= pred + (dc << point_transform);
982 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
985 pred= 1 << (bits - 1);
991 pred= ptr16[-linesize];
993 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
997 if (s->interlaced && s->bottom_field)
998 ptr16 += linesize >> 1;
1000 *ptr16= pred + (dc << point_transform);
1009 for (i = 0; i < nb_components; i++) {
1012 int n, h, v, x, y, c, j, linesize, dc;
1013 n = s->nb_blocks[i];
1014 c = s->comp_index[i];
1019 linesize = s->linesize[c];
1021 if(bits>8) linesize /= 2;
1023 for (j = 0; j < n; j++) {
1026 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1030 ptr = s->picture.data[c] +
1031 (linesize * (v * mb_y + y)) +
1032 (h * mb_x + x); //FIXME optimize this crap
1033 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1036 *ptr = pred + (dc << point_transform);
1038 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1039 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1042 *ptr16= pred + (dc << point_transform);
1052 if (s->restart_interval && !--s->restart_count) {
1053 align_get_bits(&s->gb);
1054 skip_bits(&s->gb, 16); /* skip RSTn */
1061 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1062 uint8_t *dst, const uint8_t *src,
1063 int linesize, int lowres)
1066 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1068 case 1: copy_block4(dst, src, linesize, linesize, 4);
1070 case 2: copy_block2(dst, src, linesize, linesize, 2);
1072 case 3: *dst = *src;
1077 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1079 int block_x, block_y;
1080 int size = 8 >> s->avctx->lowres;
1082 for (block_y=0; block_y<size; block_y++)
1083 for (block_x=0; block_x<size; block_x++)
1084 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1086 for (block_y=0; block_y<size; block_y++)
1087 for (block_x=0; block_x<size; block_x++)
1088 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1092 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1093 int Al, const uint8_t *mb_bitmask,
1094 const AVFrame *reference)
1097 uint8_t *data[MAX_COMPONENTS];
1098 const uint8_t *reference_data[MAX_COMPONENTS];
1099 int linesize[MAX_COMPONENTS];
1100 GetBitContext mb_bitmask_gb;
1101 int bytes_per_pixel = 1 + (s->bits > 8);
1104 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1106 if (s->flipped && s->avctx->lowres) {
1107 av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with lowres\n");
1110 s->restart_count = 0;
1111 for (i = 0; i < nb_components; i++) {
1112 int c = s->comp_index[i];
1113 data[c] = s->picture_ptr->data[c];
1114 reference_data[c] = reference ? reference->data[c] : NULL;
1115 linesize[c] = s->linesize[c];
1116 s->coefs_finished[c] |= 1;
1117 if (s->flipped && !(s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
1118 // picture should be flipped upside-down for this codec
1119 int offset = (linesize[c] * (s->v_scount[i] *
1120 (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
1122 reference_data[c] += offset;
1127 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1128 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1129 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1131 if (s->restart_interval && !s->restart_count)
1132 s->restart_count = s->restart_interval;
1134 if (get_bits_left(&s->gb) < 0) {
1135 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1136 -get_bits_left(&s->gb));
1137 return AVERROR_INVALIDDATA;
1139 for (i = 0; i < nb_components; i++) {
1141 int n, h, v, x, y, c, j;
1143 n = s->nb_blocks[i];
1144 c = s->comp_index[i];
1149 for (j = 0; j < n; j++) {
1150 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1151 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1153 if (s->interlaced && s->bottom_field)
1154 block_offset += linesize[c] >> 1;
1155 ptr = data[c] + block_offset;
1156 if (!s->progressive) {
1158 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1159 linesize[c], s->avctx->lowres);
1162 s->dsp.clear_block(s->block);
1163 if (decode_block(s, s->block, i,
1164 s->dc_index[i], s->ac_index[i],
1165 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1166 av_log(s->avctx, AV_LOG_ERROR,
1167 "error y=%d x=%d\n", mb_y, mb_x);
1168 return AVERROR_INVALIDDATA;
1170 s->dsp.idct_put(ptr, linesize[c], s->block);
1172 shift_output(s, ptr, linesize[c]);
1175 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1177 int16_t *block = s->blocks[c][block_idx];
1179 block[0] += get_bits1(&s->gb) *
1180 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1181 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1182 s->quant_matrixes[s->quant_sindex[i]],
1184 av_log(s->avctx, AV_LOG_ERROR,
1185 "error y=%d x=%d\n", mb_y, mb_x);
1186 return AVERROR_INVALIDDATA;
1189 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1190 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1191 mb_x, mb_y, x, y, c, s->bottom_field,
1192 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1200 handle_rstn(s, nb_components);
1206 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1207 int se, int Ah, int Al)
1211 int c = s->comp_index[0];
1212 uint8_t *data = s->picture.data[c];
1213 int linesize = s->linesize[c];
1215 int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1216 int bytes_per_pixel = 1 + (s->bits > 8);
1218 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1219 if (se < ss || se > 63) {
1220 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1221 return AVERROR_INVALIDDATA;
1225 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
1226 last_scan = !~s->coefs_finished[c];
1229 if (s->interlaced && s->bottom_field)
1230 data += linesize >> 1;
1232 s->restart_count = 0;
1234 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1235 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1236 int block_idx = mb_y * s->block_stride[c];
1237 int16_t (*block)[64] = &s->blocks[c][block_idx];
1238 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1239 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1241 if (s->restart_interval && !s->restart_count)
1242 s->restart_count = s->restart_interval;
1245 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1246 quant_matrix, ss, se, Al, &EOBRUN);
1248 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1249 quant_matrix, ss, se, Al, &EOBRUN);
1251 av_log(s->avctx, AV_LOG_ERROR,
1252 "error y=%d x=%d\n", mb_y, mb_x);
1253 return AVERROR_INVALIDDATA;
1257 s->dsp.idct_put(ptr, linesize, *block);
1259 shift_output(s, ptr, linesize);
1260 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1262 if (handle_rstn(s, 0))
1269 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1270 const AVFrame *reference)
1272 int len, nb_components, i, h, v, predictor, point_transform;
1274 const int block_size = s->lossless ? 1 : 8;
1275 int ilv, prev_shift;
1277 if (!s->got_picture) {
1278 av_log(s->avctx, AV_LOG_WARNING,
1279 "Can not process SOS before SOF, skipping\n");
1283 av_assert0(s->picture_ptr->data[0]);
1284 /* XXX: verify len field validity */
1285 len = get_bits(&s->gb, 16);
1286 nb_components = get_bits(&s->gb, 8);
1287 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1288 av_log(s->avctx, AV_LOG_ERROR,
1289 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1290 return AVERROR_PATCHWELCOME;
1292 if (len != 6 + 2 * nb_components) {
1293 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1294 return AVERROR_INVALIDDATA;
1296 for (i = 0; i < nb_components; i++) {
1297 id = get_bits(&s->gb, 8) - 1;
1298 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1299 /* find component index */
1300 for (index = 0; index < s->nb_components; index++)
1301 if (id == s->component_id[index])
1303 if (index == s->nb_components) {
1304 av_log(s->avctx, AV_LOG_ERROR,
1305 "decode_sos: index(%d) out of components\n", index);
1306 return AVERROR_INVALIDDATA;
1308 /* Metasoft MJPEG codec has Cb and Cr swapped */
1309 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1310 && nb_components == 3 && s->nb_components == 3 && i)
1313 s->quant_sindex[i] = s->quant_index[index];
1314 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1315 s->h_scount[i] = s->h_count[index];
1316 s->v_scount[i] = s->v_count[index];
1318 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1320 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1321 index = (index+2)%3;
1323 s->comp_index[i] = index;
1325 s->dc_index[i] = get_bits(&s->gb, 4);
1326 s->ac_index[i] = get_bits(&s->gb, 4);
1328 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1329 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1331 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))
1335 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1336 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1337 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1338 prev_shift = get_bits(&s->gb, 4); /* Ah */
1339 point_transform = get_bits(&s->gb, 4); /* Al */
1341 prev_shift = point_transform = 0;
1343 if (nb_components > 1) {
1344 /* interleaved stream */
1345 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1346 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1347 } else if (!s->ls) { /* skip this for JPEG-LS */
1348 h = s->h_max / s->h_scount[0];
1349 v = s->v_max / s->v_scount[0];
1350 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1351 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1352 s->nb_blocks[0] = 1;
1357 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1358 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1359 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1360 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1361 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1364 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1365 for (i = s->mjpb_skiptosod; i > 0; i--)
1366 skip_bits(&s->gb, 8);
1369 for (i = 0; i < nb_components; i++)
1370 s->last_dc[i] = (4 << s->bits);
1373 av_assert0(s->picture_ptr == &s->picture);
1374 if (CONFIG_JPEGLS_DECODER && s->ls) {
1376 // reset_ls_coding_parameters(s, 0);
1378 if ((ret = ff_jpegls_decode_picture(s, predictor,
1379 point_transform, ilv)) < 0)
1383 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1386 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1388 nb_components)) < 0)
1393 if (s->progressive && predictor) {
1394 av_assert0(s->picture_ptr == &s->picture);
1395 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1397 point_transform)) < 0)
1400 if ((ret = mjpeg_decode_scan(s, nb_components,
1401 prev_shift, point_transform,
1402 mb_bitmask, reference)) < 0)
1407 if (s->interlaced &&
1408 get_bits_left(&s->gb) > 32 &&
1409 show_bits(&s->gb, 8) == 0xFF) {
1410 GetBitContext bak = s->gb;
1411 align_get_bits(&bak);
1412 if (show_bits(&bak, 16) == 0xFFD1) {
1413 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1415 skip_bits(&s->gb, 16);
1416 s->bottom_field ^= 1;
1425 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1426 return AVERROR_INVALIDDATA;
1429 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1431 if (get_bits(&s->gb, 16) != 4)
1432 return AVERROR_INVALIDDATA;
1433 s->restart_interval = get_bits(&s->gb, 16);
1434 s->restart_count = 0;
1435 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1436 s->restart_interval);
1441 static int mjpeg_decode_app(MJpegDecodeContext *s)
1445 len = get_bits(&s->gb, 16);
1447 return AVERROR_INVALIDDATA;
1448 if (8 * len > get_bits_left(&s->gb))
1449 return AVERROR_INVALIDDATA;
1451 id = get_bits_long(&s->gb, 32);
1454 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1455 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X len=%d\n", id, len);
1457 /* Buggy AVID, it puts EOI only at every 10th frame. */
1458 /* Also, this fourcc is used by non-avid files too, it holds some
1459 information, but it's always present in AVID-created files. */
1460 if (id == AV_RB32("AVI1")) {
1466 4bytes field_size_less_padding
1469 i = get_bits(&s->gb, 8); len--;
1470 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1472 skip_bits(&s->gb, 8);
1473 skip_bits(&s->gb, 32);
1474 skip_bits(&s->gb, 32);
1482 if (id == AV_RB32("JFIF")) {
1483 int t_w, t_h, v1, v2;
1484 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1485 v1 = get_bits(&s->gb, 8);
1486 v2 = get_bits(&s->gb, 8);
1487 skip_bits(&s->gb, 8);
1489 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1490 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1492 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1493 av_log(s->avctx, AV_LOG_INFO,
1494 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1496 s->avctx->sample_aspect_ratio.num,
1497 s->avctx->sample_aspect_ratio.den);
1499 t_w = get_bits(&s->gb, 8);
1500 t_h = get_bits(&s->gb, 8);
1502 /* skip thumbnail */
1503 if (len -10 - (t_w * t_h * 3) > 0)
1504 len -= t_w * t_h * 3;
1510 if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1511 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1512 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1513 skip_bits(&s->gb, 16); /* version */
1514 skip_bits(&s->gb, 16); /* flags0 */
1515 skip_bits(&s->gb, 16); /* flags1 */
1516 skip_bits(&s->gb, 8); /* transform */
1521 if (id == AV_RB32("LJIF")) {
1522 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1523 av_log(s->avctx, AV_LOG_INFO,
1524 "Pegasus lossless jpeg header found\n");
1525 skip_bits(&s->gb, 16); /* version ? */
1526 skip_bits(&s->gb, 16); /* unknown always 0? */
1527 skip_bits(&s->gb, 16); /* unknown always 0? */
1528 skip_bits(&s->gb, 16); /* unknown always 0? */
1529 switch (i=get_bits(&s->gb, 8)) {
1539 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1544 if (id == AV_RL32("colr") && len > 0) {
1545 s->colr = get_bits(&s->gb, 8);
1546 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1547 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1551 if (id == AV_RL32("xfrm") && len > 0) {
1552 s->xfrm = get_bits(&s->gb, 8);
1553 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1554 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1560 if (s->start_code == APP1 && id == AV_RB32("Exif")) {
1561 GetByteContext gbytes;
1562 int ret, le, ifd_offset, bytes_read;
1563 const uint8_t *aligned;
1565 skip_bits(&s->gb, 16); // skip padding
1568 // init byte wise reading
1569 aligned = align_get_bits(&s->gb);
1570 bytestream2_init(&gbytes, aligned, len);
1573 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1575 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1579 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1581 // read 0th IFD and store the metadata
1582 // (return values > 0 indicate the presence of subimage metadata)
1583 ret = ff_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1585 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1589 bytes_read = bytestream2_tell(&gbytes);
1590 skip_bits(&s->gb, bytes_read << 3);
1597 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1598 id = get_bits_long(&s->gb, 32);
1601 if (id == AV_RB32("mjpg")) {
1603 skip_bits(&s->gb, 32); /* field size */
1604 skip_bits(&s->gb, 32); /* pad field size */
1605 skip_bits(&s->gb, 32); /* next off */
1606 skip_bits(&s->gb, 32); /* quant off */
1607 skip_bits(&s->gb, 32); /* huff off */
1608 skip_bits(&s->gb, 32); /* image off */
1609 skip_bits(&s->gb, 32); /* scan off */
1610 skip_bits(&s->gb, 32); /* data off */
1612 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1613 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1618 /* slow but needed for extreme adobe jpegs */
1620 av_log(s->avctx, AV_LOG_ERROR,
1621 "mjpeg: error, decode_app parser read over the end\n");
1623 skip_bits(&s->gb, 8);
1628 static int mjpeg_decode_com(MJpegDecodeContext *s)
1630 int len = get_bits(&s->gb, 16);
1631 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1632 char *cbuf = av_malloc(len - 1);
1635 for (i = 0; i < len - 2; i++)
1636 cbuf[i] = get_bits(&s->gb, 8);
1637 if (i > 0 && cbuf[i - 1] == '\n')
1642 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1643 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1645 /* buggy avid, it puts EOI only at every 10th frame */
1646 if (!strncmp(cbuf, "AVID", 4)) {
1648 if (len > 14 && cbuf[12] == 1) /* 1 - NTSC, 2 - PAL */
1649 s->interlace_polarity = 1;
1650 } else if (!strcmp(cbuf, "CS=ITU601"))
1652 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32)) ||
1653 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1663 /* return the 8 bit start code value and update the search
1664 state. Return -1 if no start code found */
1665 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1667 const uint8_t *buf_ptr;
1672 buf_ptr = *pbuf_ptr;
1673 while (buf_end - buf_ptr > 1) {
1676 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1685 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1686 *pbuf_ptr = buf_ptr;
1690 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1691 const uint8_t **buf_ptr, const uint8_t *buf_end,
1692 const uint8_t **unescaped_buf_ptr,
1693 int *unescaped_buf_size)
1696 start_code = find_marker(buf_ptr, buf_end);
1698 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1700 return AVERROR(ENOMEM);
1702 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1703 if (start_code == SOS && !s->ls) {
1704 const uint8_t *src = *buf_ptr;
1705 uint8_t *dst = s->buffer;
1707 while (src < buf_end) {
1708 uint8_t x = *(src++);
1711 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1713 while (src < buf_end && x == 0xff)
1716 if (x >= 0xd0 && x <= 0xd7)
1723 *unescaped_buf_ptr = s->buffer;
1724 *unescaped_buf_size = dst - s->buffer;
1725 memset(s->buffer + *unescaped_buf_size, 0,
1726 FF_INPUT_BUFFER_PADDING_SIZE);
1728 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1729 (buf_end - *buf_ptr) - (dst - s->buffer));
1730 } else if (start_code == SOS && s->ls) {
1731 const uint8_t *src = *buf_ptr;
1732 uint8_t *dst = s->buffer;
1740 while (src + t < buf_end) {
1741 uint8_t x = src[t++];
1743 while ((src + t < buf_end) && x == 0xff)
1752 init_put_bits(&pb, dst, t);
1754 /* unescape bitstream */
1756 uint8_t x = src[b++];
1757 put_bits(&pb, 8, x);
1760 put_bits(&pb, 7, x);
1764 flush_put_bits(&pb);
1766 *unescaped_buf_ptr = dst;
1767 *unescaped_buf_size = (bit_count + 7) >> 3;
1768 memset(s->buffer + *unescaped_buf_size, 0,
1769 FF_INPUT_BUFFER_PADDING_SIZE);
1771 *unescaped_buf_ptr = *buf_ptr;
1772 *unescaped_buf_size = buf_end - *buf_ptr;
1778 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1781 const uint8_t *buf = avpkt->data;
1782 int buf_size = avpkt->size;
1783 MJpegDecodeContext *s = avctx->priv_data;
1784 const uint8_t *buf_end, *buf_ptr;
1785 const uint8_t *unescaped_buf_ptr;
1787 int unescaped_buf_size;
1792 av_dict_free(&s->exif_metadata);
1795 buf_end = buf + buf_size;
1796 while (buf_ptr < buf_end) {
1797 /* find start next marker */
1798 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1800 &unescaped_buf_size);
1802 if (start_code < 0) {
1804 } else if (unescaped_buf_size > INT_MAX / 8) {
1805 av_log(avctx, AV_LOG_ERROR,
1806 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1807 start_code, unescaped_buf_size, buf_size);
1808 return AVERROR_INVALIDDATA;
1810 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1811 start_code, buf_end - buf_ptr);
1813 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
1816 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
1820 s->start_code = start_code;
1821 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1822 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1824 /* process markers */
1825 if (start_code >= 0xd0 && start_code <= 0xd7)
1826 av_log(avctx, AV_LOG_DEBUG,
1827 "restart marker: %d\n", start_code & 0x0f);
1829 else if (start_code >= APP0 && start_code <= APP15)
1830 mjpeg_decode_app(s);
1832 else if (start_code == COM)
1833 mjpeg_decode_com(s);
1837 if (!CONFIG_JPEGLS_DECODER &&
1838 (start_code == SOF48 || start_code == LSE)) {
1839 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
1840 return AVERROR(ENOSYS);
1843 switch (start_code) {
1845 s->restart_interval = 0;
1846 s->restart_count = 0;
1847 /* nothing to do on SOI */
1850 ff_mjpeg_decode_dqt(s);
1853 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1854 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1863 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1870 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1877 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1884 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1888 if (!CONFIG_JPEGLS_DECODER ||
1889 (ret = ff_jpegls_decode_lse(s)) < 0)
1895 if (!s->got_picture) {
1896 av_log(avctx, AV_LOG_WARNING,
1897 "Found EOI before any SOF, ignoring\n");
1900 if (s->interlaced) {
1901 s->bottom_field ^= 1;
1902 /* if not bottom field, do not output image yet */
1903 if (s->bottom_field == !s->interlace_polarity)
1906 if ((ret = av_frame_ref(data, s->picture_ptr)) < 0)
1912 int qp = FFMAX3(s->qscale[0],
1915 int qpw = (s->width + 15) / 16;
1916 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
1918 memset(qp_table_buf->data, qp, qpw);
1919 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
1922 if(avctx->debug & FF_DEBUG_QP)
1923 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
1928 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1929 (avctx->err_recognition & AV_EF_EXPLODE))
1933 mjpeg_decode_dri(s);
1945 av_log(avctx, AV_LOG_ERROR,
1946 "mjpeg: unsupported coding type (%x)\n", start_code);
1950 /* eof process start code */
1951 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1952 av_log(avctx, AV_LOG_DEBUG,
1953 "marker parser used %d bytes (%d bits)\n",
1954 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1956 if (s->got_picture) {
1957 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1960 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1961 return AVERROR_INVALIDDATA;
1967 uint8_t *line = s->picture_ptr->data[s->upscale_h];
1968 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
1969 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1970 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
1971 avctx->pix_fmt == AV_PIX_FMT_YUV440P);
1972 for (i = 0; i < s->chroma_height; i++) {
1973 for (index = s->width - 1; index; index--)
1974 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
1975 line += s->linesize[s->upscale_h];
1979 uint8_t *dst = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(s->height - 1) * s->linesize[s->upscale_v]];
1981 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
1982 w = s->width >> hshift;
1983 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
1984 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1985 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
1986 avctx->pix_fmt == AV_PIX_FMT_YUV422P);
1987 for (i = s->height - 1; i; i--) {
1988 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[i / 2 * s->linesize[s->upscale_v]];
1989 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(i + 1) / 2 * s->linesize[s->upscale_v]];
1991 memcpy(dst, src1, w);
1993 for (index = 0; index < w; index++)
1994 dst[index] = (src1[index] + src2[index]) >> 1;
1996 dst -= s->linesize[s->upscale_v];
1999 if (s->flipped && (s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
2001 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2002 for (index=0; index<4; index++) {
2003 uint8_t *dst = s->picture_ptr->data[index];
2006 if(index && index<3){
2007 w = FF_CEIL_RSHIFT(w, hshift);
2008 h = FF_CEIL_RSHIFT(h, vshift);
2011 uint8_t *dst2 = dst + s->linesize[index]*(h-1);
2012 for (i=0; i<h/2; i++) {
2014 FFSWAP(int, dst[j], dst2[j]);
2015 dst += s->linesize[index];
2016 dst2 -= s->linesize[index];
2022 av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
2023 av_dict_free(&s->exif_metadata);
2025 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %td bytes\n",
2027 // return buf_end - buf_ptr;
2028 return buf_ptr - buf;
2031 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2033 MJpegDecodeContext *s = avctx->priv_data;
2036 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2037 av_log(avctx, AV_LOG_INFO, "Single field\n");
2041 av_frame_unref(s->picture_ptr);
2044 av_freep(&s->ljpeg_buffer);
2045 s->ljpeg_buffer_size = 0;
2047 for (i = 0; i < 3; i++) {
2048 for (j = 0; j < 4; j++)
2049 ff_free_vlc(&s->vlcs[i][j]);
2051 for (i = 0; i < MAX_COMPONENTS; i++) {
2052 av_freep(&s->blocks[i]);
2053 av_freep(&s->last_nnz[i]);
2055 av_dict_free(&s->exif_metadata);
2059 static void decode_flush(AVCodecContext *avctx)
2061 MJpegDecodeContext *s = avctx->priv_data;
2065 #if CONFIG_MJPEG_DECODER
2066 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2067 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2068 static const AVOption options[] = {
2069 { "extern_huff", "Use external huffman table.",
2070 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
2074 static const AVClass mjpegdec_class = {
2075 .class_name = "MJPEG decoder",
2076 .item_name = av_default_item_name,
2078 .version = LIBAVUTIL_VERSION_INT,
2081 AVCodec ff_mjpeg_decoder = {
2083 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2084 .type = AVMEDIA_TYPE_VIDEO,
2085 .id = AV_CODEC_ID_MJPEG,
2086 .priv_data_size = sizeof(MJpegDecodeContext),
2087 .init = ff_mjpeg_decode_init,
2088 .close = ff_mjpeg_decode_end,
2089 .decode = ff_mjpeg_decode_frame,
2090 .flush = decode_flush,
2091 .capabilities = CODEC_CAP_DR1,
2093 .priv_class = &mjpegdec_class,
2096 #if CONFIG_THP_DECODER
2097 AVCodec ff_thp_decoder = {
2099 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2100 .type = AVMEDIA_TYPE_VIDEO,
2101 .id = AV_CODEC_ID_THP,
2102 .priv_data_size = sizeof(MJpegDecodeContext),
2103 .init = ff_mjpeg_decode_init,
2104 .close = ff_mjpeg_decode_end,
2105 .decode = ff_mjpeg_decode_frame,
2106 .flush = decode_flush,
2107 .capabilities = CODEC_CAP_DR1,