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;
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 if (!s->lossless && !(s->bits <= 8 || nb_components == 1)) {
269 avpriv_report_missing_feature(s->avctx,
270 "lossy that is not <= 8 "
271 "bits/component or 16-bit gray");
272 return AVERROR_PATCHWELCOME;
274 s->nb_components = nb_components;
277 memset(h_count, 0, sizeof(h_count));
278 memset(v_count, 0, sizeof(v_count));
279 for (i = 0; i < nb_components; i++) {
281 s->component_id[i] = get_bits(&s->gb, 8) - 1;
282 h_count[i] = get_bits(&s->gb, 4);
283 v_count[i] = get_bits(&s->gb, 4);
284 /* compute hmax and vmax (only used in interleaved case) */
285 if (h_count[i] > s->h_max)
286 s->h_max = h_count[i];
287 if (v_count[i] > s->v_max)
288 s->v_max = v_count[i];
289 s->quant_index[i] = get_bits(&s->gb, 8);
290 if (s->quant_index[i] >= 4) {
291 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
292 return AVERROR_INVALIDDATA;
294 if (!h_count[i] || !v_count[i]) {
295 av_log(s->avctx, AV_LOG_ERROR,
296 "Invalid sampling factor in component %d %d:%d\n",
297 i, h_count[i], v_count[i]);
298 return AVERROR_INVALIDDATA;
301 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
302 i, h_count[i], v_count[i],
303 s->component_id[i], s->quant_index[i]);
306 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
307 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
308 return AVERROR_PATCHWELCOME;
312 /* if different size, realloc/alloc picture */
313 if ( width != s->width || height != s->height
314 || memcmp(s->h_count, h_count, sizeof(h_count))
315 || memcmp(s->v_count, v_count, sizeof(v_count))) {
319 memcpy(s->h_count, h_count, sizeof(h_count));
320 memcpy(s->v_count, v_count, sizeof(v_count));
324 /* test interlaced mode */
325 if (s->first_picture &&
326 s->org_height != 0 &&
327 s->height < ((s->org_height * 3) / 4)) {
329 s->bottom_field = s->interlace_polarity;
330 s->picture_ptr->interlaced_frame = 1;
331 s->picture_ptr->top_field_first = !s->interlace_polarity;
335 avcodec_set_dimensions(s->avctx, width, height);
337 s->first_picture = 0;
340 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
341 if (s->progressive) {
342 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
343 return AVERROR_INVALIDDATA;
346 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
348 else if (!s->lossless)
350 /* XXX: not complete test ! */
351 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
352 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
353 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
354 (s->h_count[3] << 4) | s->v_count[3];
355 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
356 /* NOTE we do not allocate pictures large enough for the possible
357 * padding of h/v_count being 4 */
358 if (!(pix_fmt_id & 0xD0D0D0D0))
359 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
360 if (!(pix_fmt_id & 0x0D0D0D0D))
361 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
363 switch (pix_fmt_id) {
366 s->avctx->pix_fmt = AV_PIX_FMT_BGR24;
368 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
369 s->avctx->pix_fmt = AV_PIX_FMT_GBR24P;
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;
375 av_assert0(s->nb_components == 3);
379 s->avctx->pix_fmt = AV_PIX_FMT_ABGR;
381 s->avctx->pix_fmt = /*s->cs_itu601 ?*/ AV_PIX_FMT_YUVA444P/* : AV_PIX_FMT_YUVJA444P*/;
382 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
384 av_assert0(s->nb_components == 4);
388 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
389 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
391 s->upscale_h = (pix_fmt_id == 0x22122100);
392 s->chroma_height = s->height;
396 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
397 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
398 s->upscale_v = (pix_fmt_id == 0x22211200);
400 s->chroma_height = s->height;
403 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
404 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
407 s->chroma_height = s->height / 2;
419 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
421 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
426 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
427 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
428 s->upscale_h = (pix_fmt_id == 0x22211100) * 2 + (pix_fmt_id == 0x22112100);
429 s->chroma_height = s->height / 2;
432 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
433 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
437 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
438 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
439 s->upscale_v = (pix_fmt_id == 0x22121100) + 1;
442 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
443 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
446 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
447 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
450 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
451 return AVERROR_PATCHWELCOME;
453 if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
454 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
455 return AVERROR_PATCHWELCOME;
458 s->upscale_h = s->upscale_v = 0;
459 if (s->nb_components > 1)
460 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
461 else if (s->bits <= 8)
462 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
464 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
467 av_frame_unref(s->picture_ptr);
468 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
470 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
471 s->picture_ptr->key_frame = 1;
474 for (i = 0; i < 3; i++)
475 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
477 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
478 s->width, s->height, s->linesize[0], s->linesize[1],
479 s->interlaced, s->avctx->height);
481 if (len != (8 + (3 * nb_components)))
482 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
485 if (s->rgb && !s->lossless && !s->ls) {
486 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
487 return AVERROR_PATCHWELCOME;
490 /* totally blank picture as progressive JPEG will only add details to it */
491 if (s->progressive) {
492 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
493 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
494 for (i = 0; i < s->nb_components; i++) {
495 int size = bw * bh * s->h_count[i] * s->v_count[i];
496 av_freep(&s->blocks[i]);
497 av_freep(&s->last_nnz[i]);
498 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
499 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
500 s->block_stride[i] = bw * s->h_count[i];
502 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
507 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
510 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
511 if (code < 0 || code > 16) {
512 av_log(s->avctx, AV_LOG_WARNING,
513 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
514 0, dc_index, &s->vlcs[0][dc_index]);
519 return get_xbits(&s->gb, code);
524 /* decode block and dequantize */
525 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
526 int dc_index, int ac_index, int16_t *quant_matrix)
528 int code, i, j, level, val;
531 val = mjpeg_decode_dc(s, dc_index);
533 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
534 return AVERROR_INVALIDDATA;
536 val = val * quant_matrix[0] + s->last_dc[component];
537 s->last_dc[component] = val;
541 {OPEN_READER(re, &s->gb);
543 UPDATE_CACHE(re, &s->gb);
544 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
546 i += ((unsigned)code) >> 4;
549 if (code > MIN_CACHE_BITS - 16)
550 UPDATE_CACHE(re, &s->gb);
553 int cache = GET_CACHE(re, &s->gb);
554 int sign = (~cache) >> 31;
555 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
558 LAST_SKIP_BITS(re, &s->gb, code);
561 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
562 return AVERROR_INVALIDDATA;
564 j = s->scantable.permutated[i];
565 block[j] = level * quant_matrix[j];
568 CLOSE_READER(re, &s->gb);}
573 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
574 int component, int dc_index,
575 int16_t *quant_matrix, int Al)
578 s->dsp.clear_block(block);
579 val = mjpeg_decode_dc(s, dc_index);
581 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
582 return AVERROR_INVALIDDATA;
584 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
585 s->last_dc[component] = val;
590 /* decode block and dequantize - progressive JPEG version */
591 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
592 uint8_t *last_nnz, int ac_index,
593 int16_t *quant_matrix,
594 int ss, int se, int Al, int *EOBRUN)
596 int code, i, j, level, val, run;
604 OPEN_READER(re, &s->gb);
605 for (i = ss; ; i++) {
606 UPDATE_CACHE(re, &s->gb);
607 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
609 run = ((unsigned) code) >> 4;
613 if (code > MIN_CACHE_BITS - 16)
614 UPDATE_CACHE(re, &s->gb);
617 int cache = GET_CACHE(re, &s->gb);
618 int sign = (~cache) >> 31;
619 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
622 LAST_SKIP_BITS(re, &s->gb, code);
626 j = s->scantable.permutated[se];
627 block[j] = level * quant_matrix[j] << Al;
630 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
631 return AVERROR_INVALIDDATA;
633 j = s->scantable.permutated[i];
634 block[j] = level * quant_matrix[j] << Al;
636 if (run == 0xF) {// ZRL - skip 15 coefficients
639 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
640 return AVERROR_INVALIDDATA;
645 UPDATE_CACHE(re, &s->gb);
646 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
647 LAST_SKIP_BITS(re, &s->gb, run);
654 CLOSE_READER(re, &s->gb);
663 #define REFINE_BIT(j) { \
664 UPDATE_CACHE(re, &s->gb); \
665 sign = block[j] >> 15; \
666 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
667 ((quant_matrix[j] ^ sign) - sign) << Al; \
668 LAST_SKIP_BITS(re, &s->gb, 1); \
676 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
681 j = s->scantable.permutated[i]; \
684 else if (run-- == 0) \
688 /* decode block and dequantize - progressive JPEG refinement pass */
689 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
691 int ac_index, int16_t *quant_matrix,
692 int ss, int se, int Al, int *EOBRUN)
694 int code, i = ss, j, sign, val, run;
695 int last = FFMIN(se, *last_nnz);
697 OPEN_READER(re, &s->gb);
702 UPDATE_CACHE(re, &s->gb);
703 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
706 run = ((unsigned) code) >> 4;
707 UPDATE_CACHE(re, &s->gb);
708 val = SHOW_UBITS(re, &s->gb, 1);
709 LAST_SKIP_BITS(re, &s->gb, 1);
711 j = s->scantable.permutated[i];
713 block[j] = ((quant_matrix[j]^val) - val) << Al;
717 CLOSE_READER(re, &s->gb);
721 run = ((unsigned) code) >> 4;
728 UPDATE_CACHE(re, &s->gb);
729 run += SHOW_UBITS(re, &s->gb, val);
730 LAST_SKIP_BITS(re, &s->gb, val);
742 for (; i <= last; i++) {
743 j = s->scantable.permutated[i];
747 CLOSE_READER(re, &s->gb);
754 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
759 if (s->restart_interval) {
761 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
762 align_get_bits(&s->gb);
763 for (i = 0; i < nb_components; i++) /* reset dc */
764 s->last_dc[i] = (4 << s->bits);
767 i = 8 + ((-get_bits_count(&s->gb)) & 7);
769 if (s->restart_count == 0) {
770 if( show_bits(&s->gb, i) == (1 << i) - 1
771 || show_bits(&s->gb, i) == 0xFF) {
772 int pos = get_bits_count(&s->gb);
773 align_get_bits(&s->gb);
774 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
775 skip_bits(&s->gb, 8);
776 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
777 for (i = 0; i < nb_components; i++) /* reset dc */
778 s->last_dc[i] = (4 << s->bits);
781 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
788 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
791 uint16_t (*buffer)[4];
792 int left[4], top[4], topleft[4];
793 const int linesize = s->linesize[0];
794 const int mask = ((1 << s->bits) - 1) << point_transform;
798 if (s->nb_components != 3 && s->nb_components != 4)
799 return AVERROR_INVALIDDATA;
800 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
801 return AVERROR_INVALIDDATA;
804 s->restart_count = s->restart_interval;
806 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
807 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
808 buffer = s->ljpeg_buffer;
810 for (i = 0; i < 4; i++)
811 buffer[0][i] = 1 << (s->bits - 1);
813 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
814 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
816 if (s->interlaced && s->bottom_field)
817 ptr += linesize >> 1;
819 for (i = 0; i < 4; i++)
820 top[i] = left[i] = topleft[i] = buffer[0][i];
822 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
823 int modified_predictor = predictor;
825 if (s->restart_interval && !s->restart_count){
826 s->restart_count = s->restart_interval;
830 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
832 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
833 modified_predictor = 1;
835 for (i=0;i<nb_components;i++) {
839 top[i] = buffer[mb_x][i];
841 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
843 dc = mjpeg_decode_dc(s, s->dc_index[i]);
847 left[i] = buffer[mb_x][i] =
848 mask & (pred + (dc << point_transform));
851 if (s->restart_interval && !--s->restart_count) {
852 align_get_bits(&s->gb);
853 skip_bits(&s->gb, 16); /* skip RSTn */
856 if (s->nb_components == 4) {
857 for(i=0; i<nb_components; i++) {
858 int c= s->comp_index[i];
859 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
860 ptr[4*mb_x+3-c] = buffer[mb_x][i];
864 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
865 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
866 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
867 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
869 } else if (s->pegasus_rct) {
870 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
871 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
872 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
873 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
876 for(i=0; i<nb_components; i++) {
877 int c= s->comp_index[i];
878 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
879 ptr[3*mb_x+2-c] = buffer[mb_x][i];
887 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
888 int point_transform, int nb_components)
890 int i, mb_x, mb_y, mask;
891 int bits= (s->bits+7)&~7;
895 point_transform += bits - s->bits;
896 mask = ((1 << s->bits) - 1) << point_transform;
898 av_assert0(nb_components>=1 && nb_components<=4);
900 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
901 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
902 if (s->restart_interval && !s->restart_count){
903 s->restart_count = s->restart_interval;
908 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
909 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
910 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
911 for (i = 0; i < nb_components; i++) {
914 int n, h, v, x, y, c, j, linesize;
916 c = s->comp_index[i];
921 linesize= s->linesize[c];
923 if(bits>8) linesize /= 2;
928 dc = mjpeg_decode_dc(s, s->dc_index[i]);
932 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
935 pred= 1 << (bits - 1);
941 pred= ptr[-linesize];
943 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
947 if (s->interlaced && s->bottom_field)
948 ptr += linesize >> 1;
950 *ptr= pred + (dc << point_transform);
952 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
955 pred= 1 << (bits - 1);
961 pred= ptr16[-linesize];
963 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
967 if (s->interlaced && s->bottom_field)
968 ptr16 += linesize >> 1;
970 *ptr16= pred + (dc << point_transform);
979 for (i = 0; i < nb_components; i++) {
982 int n, h, v, x, y, c, j, linesize, dc;
984 c = s->comp_index[i];
989 linesize = s->linesize[c];
991 if(bits>8) linesize /= 2;
993 for (j = 0; j < n; j++) {
996 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1000 ptr = s->picture.data[c] +
1001 (linesize * (v * mb_y + y)) +
1002 (h * mb_x + x); //FIXME optimize this crap
1003 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1006 *ptr = pred + (dc << point_transform);
1008 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1009 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1012 *ptr16= pred + (dc << point_transform);
1022 if (s->restart_interval && !--s->restart_count) {
1023 align_get_bits(&s->gb);
1024 skip_bits(&s->gb, 16); /* skip RSTn */
1031 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1032 uint8_t *dst, const uint8_t *src,
1033 int linesize, int lowres)
1036 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1038 case 1: copy_block4(dst, src, linesize, linesize, 4);
1040 case 2: copy_block2(dst, src, linesize, linesize, 2);
1042 case 3: *dst = *src;
1047 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1049 int block_x, block_y;
1050 int size = 8 >> s->avctx->lowres;
1052 for (block_y=0; block_y<size; block_y++)
1053 for (block_x=0; block_x<size; block_x++)
1054 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1056 for (block_y=0; block_y<size; block_y++)
1057 for (block_x=0; block_x<size; block_x++)
1058 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1062 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1063 int Al, const uint8_t *mb_bitmask,
1064 const AVFrame *reference)
1067 uint8_t *data[MAX_COMPONENTS];
1068 const uint8_t *reference_data[MAX_COMPONENTS];
1069 int linesize[MAX_COMPONENTS];
1070 GetBitContext mb_bitmask_gb;
1071 int bytes_per_pixel = 1 + (s->bits > 8);
1074 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1076 if (s->flipped && s->avctx->lowres) {
1077 av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with lowres\n");
1080 s->restart_count = 0;
1081 for (i = 0; i < nb_components; i++) {
1082 int c = s->comp_index[i];
1083 data[c] = s->picture_ptr->data[c];
1084 reference_data[c] = reference ? reference->data[c] : NULL;
1085 linesize[c] = s->linesize[c];
1086 s->coefs_finished[c] |= 1;
1087 if (s->flipped && !(s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
1088 // picture should be flipped upside-down for this codec
1089 int offset = (linesize[c] * (s->v_scount[i] *
1090 (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
1092 reference_data[c] += offset;
1097 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1098 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1099 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1101 if (s->restart_interval && !s->restart_count)
1102 s->restart_count = s->restart_interval;
1104 if (get_bits_left(&s->gb) < 0) {
1105 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1106 -get_bits_left(&s->gb));
1107 return AVERROR_INVALIDDATA;
1109 for (i = 0; i < nb_components; i++) {
1111 int n, h, v, x, y, c, j;
1113 n = s->nb_blocks[i];
1114 c = s->comp_index[i];
1119 for (j = 0; j < n; j++) {
1120 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1121 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1123 if (s->interlaced && s->bottom_field)
1124 block_offset += linesize[c] >> 1;
1125 ptr = data[c] + block_offset;
1126 if (!s->progressive) {
1128 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1129 linesize[c], s->avctx->lowres);
1132 s->dsp.clear_block(s->block);
1133 if (decode_block(s, s->block, i,
1134 s->dc_index[i], s->ac_index[i],
1135 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1136 av_log(s->avctx, AV_LOG_ERROR,
1137 "error y=%d x=%d\n", mb_y, mb_x);
1138 return AVERROR_INVALIDDATA;
1140 s->dsp.idct_put(ptr, linesize[c], s->block);
1142 shift_output(s, ptr, linesize[c]);
1145 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1147 int16_t *block = s->blocks[c][block_idx];
1149 block[0] += get_bits1(&s->gb) *
1150 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1151 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1152 s->quant_matrixes[s->quant_sindex[i]],
1154 av_log(s->avctx, AV_LOG_ERROR,
1155 "error y=%d x=%d\n", mb_y, mb_x);
1156 return AVERROR_INVALIDDATA;
1159 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1160 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1161 mb_x, mb_y, x, y, c, s->bottom_field,
1162 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1170 handle_rstn(s, nb_components);
1176 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1177 int se, int Ah, int Al)
1181 int c = s->comp_index[0];
1182 uint8_t *data = s->picture.data[c];
1183 int linesize = s->linesize[c];
1185 int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1186 int bytes_per_pixel = 1 + (s->bits > 8);
1188 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1189 if (se < ss || se > 63) {
1190 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1191 return AVERROR_INVALIDDATA;
1195 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
1196 last_scan = !~s->coefs_finished[c];
1199 if (s->interlaced && s->bottom_field)
1200 data += linesize >> 1;
1202 s->restart_count = 0;
1204 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1205 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1206 int block_idx = mb_y * s->block_stride[c];
1207 int16_t (*block)[64] = &s->blocks[c][block_idx];
1208 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1209 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1211 if (s->restart_interval && !s->restart_count)
1212 s->restart_count = s->restart_interval;
1215 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1216 quant_matrix, ss, se, Al, &EOBRUN);
1218 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1219 quant_matrix, ss, se, Al, &EOBRUN);
1221 av_log(s->avctx, AV_LOG_ERROR,
1222 "error y=%d x=%d\n", mb_y, mb_x);
1223 return AVERROR_INVALIDDATA;
1227 s->dsp.idct_put(ptr, linesize, *block);
1229 shift_output(s, ptr, linesize);
1230 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1232 if (handle_rstn(s, 0))
1239 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1240 const AVFrame *reference)
1242 int len, nb_components, i, h, v, predictor, point_transform;
1244 const int block_size = s->lossless ? 1 : 8;
1245 int ilv, prev_shift;
1247 if (!s->got_picture) {
1248 av_log(s->avctx, AV_LOG_WARNING,
1249 "Can not process SOS before SOF, skipping\n");
1253 av_assert0(s->picture_ptr->data[0]);
1254 /* XXX: verify len field validity */
1255 len = get_bits(&s->gb, 16);
1256 nb_components = get_bits(&s->gb, 8);
1257 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1258 av_log(s->avctx, AV_LOG_ERROR,
1259 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1260 return AVERROR_PATCHWELCOME;
1262 if (len != 6 + 2 * nb_components) {
1263 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1264 return AVERROR_INVALIDDATA;
1266 for (i = 0; i < nb_components; i++) {
1267 id = get_bits(&s->gb, 8) - 1;
1268 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1269 /* find component index */
1270 for (index = 0; index < s->nb_components; index++)
1271 if (id == s->component_id[index])
1273 if (index == s->nb_components) {
1274 av_log(s->avctx, AV_LOG_ERROR,
1275 "decode_sos: index(%d) out of components\n", index);
1276 return AVERROR_INVALIDDATA;
1278 /* Metasoft MJPEG codec has Cb and Cr swapped */
1279 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1280 && nb_components == 3 && s->nb_components == 3 && i)
1283 s->quant_sindex[i] = s->quant_index[index];
1284 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1285 s->h_scount[i] = s->h_count[index];
1286 s->v_scount[i] = s->v_count[index];
1288 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1290 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1291 index = (index+2)%3;
1293 s->comp_index[i] = index;
1295 s->dc_index[i] = get_bits(&s->gb, 4);
1296 s->ac_index[i] = get_bits(&s->gb, 4);
1298 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1299 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1301 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))
1305 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1306 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1307 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1308 prev_shift = get_bits(&s->gb, 4); /* Ah */
1309 point_transform = get_bits(&s->gb, 4); /* Al */
1311 prev_shift = point_transform = 0;
1313 if (nb_components > 1) {
1314 /* interleaved stream */
1315 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1316 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1317 } else if (!s->ls) { /* skip this for JPEG-LS */
1318 h = s->h_max / s->h_scount[0];
1319 v = s->v_max / s->v_scount[0];
1320 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1321 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1322 s->nb_blocks[0] = 1;
1327 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1328 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1329 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1330 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1331 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1334 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1335 for (i = s->mjpb_skiptosod; i > 0; i--)
1336 skip_bits(&s->gb, 8);
1339 for (i = 0; i < nb_components; i++)
1340 s->last_dc[i] = (4 << s->bits);
1343 av_assert0(s->picture_ptr == &s->picture);
1344 if (CONFIG_JPEGLS_DECODER && s->ls) {
1346 // reset_ls_coding_parameters(s, 0);
1348 if ((ret = ff_jpegls_decode_picture(s, predictor,
1349 point_transform, ilv)) < 0)
1353 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1356 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1358 nb_components)) < 0)
1363 if (s->progressive && predictor) {
1364 av_assert0(s->picture_ptr == &s->picture);
1365 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1367 point_transform)) < 0)
1370 if ((ret = mjpeg_decode_scan(s, nb_components,
1371 prev_shift, point_transform,
1372 mb_bitmask, reference)) < 0)
1377 if (s->interlaced &&
1378 get_bits_left(&s->gb) > 32 &&
1379 show_bits(&s->gb, 8) == 0xFF) {
1380 GetBitContext bak = s->gb;
1381 align_get_bits(&bak);
1382 if (show_bits(&bak, 16) == 0xFFD1) {
1383 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1385 skip_bits(&s->gb, 16);
1386 s->bottom_field ^= 1;
1395 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1396 return AVERROR_INVALIDDATA;
1399 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1401 if (get_bits(&s->gb, 16) != 4)
1402 return AVERROR_INVALIDDATA;
1403 s->restart_interval = get_bits(&s->gb, 16);
1404 s->restart_count = 0;
1405 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1406 s->restart_interval);
1411 static int mjpeg_decode_app(MJpegDecodeContext *s)
1415 len = get_bits(&s->gb, 16);
1417 return AVERROR_INVALIDDATA;
1418 if (8 * len > get_bits_left(&s->gb))
1419 return AVERROR_INVALIDDATA;
1421 id = get_bits_long(&s->gb, 32);
1424 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1425 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X len=%d\n", id, len);
1427 /* Buggy AVID, it puts EOI only at every 10th frame. */
1428 /* Also, this fourcc is used by non-avid files too, it holds some
1429 information, but it's always present in AVID-created files. */
1430 if (id == AV_RB32("AVI1")) {
1436 4bytes field_size_less_padding
1439 i = get_bits(&s->gb, 8); len--;
1440 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1442 skip_bits(&s->gb, 8);
1443 skip_bits(&s->gb, 32);
1444 skip_bits(&s->gb, 32);
1452 if (id == AV_RB32("JFIF")) {
1453 int t_w, t_h, v1, v2;
1454 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1455 v1 = get_bits(&s->gb, 8);
1456 v2 = get_bits(&s->gb, 8);
1457 skip_bits(&s->gb, 8);
1459 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1460 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1462 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1463 av_log(s->avctx, AV_LOG_INFO,
1464 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1466 s->avctx->sample_aspect_ratio.num,
1467 s->avctx->sample_aspect_ratio.den);
1469 t_w = get_bits(&s->gb, 8);
1470 t_h = get_bits(&s->gb, 8);
1472 /* skip thumbnail */
1473 if (len -10 - (t_w * t_h * 3) > 0)
1474 len -= t_w * t_h * 3;
1480 if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1481 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1482 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1483 skip_bits(&s->gb, 16); /* version */
1484 skip_bits(&s->gb, 16); /* flags0 */
1485 skip_bits(&s->gb, 16); /* flags1 */
1486 skip_bits(&s->gb, 8); /* transform */
1491 if (id == AV_RB32("LJIF")) {
1492 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1493 av_log(s->avctx, AV_LOG_INFO,
1494 "Pegasus lossless jpeg header found\n");
1495 skip_bits(&s->gb, 16); /* version ? */
1496 skip_bits(&s->gb, 16); /* unknown always 0? */
1497 skip_bits(&s->gb, 16); /* unknown always 0? */
1498 skip_bits(&s->gb, 16); /* unknown always 0? */
1499 switch (i=get_bits(&s->gb, 8)) {
1509 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1514 if (id == AV_RL32("colr") && len > 0) {
1515 s->colr = get_bits(&s->gb, 8);
1516 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1517 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1521 if (id == AV_RL32("xfrm") && len > 0) {
1522 s->xfrm = get_bits(&s->gb, 8);
1523 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1524 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1530 if (s->start_code == APP1 && id == AV_RB32("Exif")) {
1531 GetByteContext gbytes;
1532 int ret, le, ifd_offset, bytes_read;
1533 const uint8_t *aligned;
1535 skip_bits(&s->gb, 16); // skip padding
1538 // init byte wise reading
1539 aligned = align_get_bits(&s->gb);
1540 bytestream2_init(&gbytes, aligned, len);
1543 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1545 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1549 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1551 // read 0th IFD and store the metadata
1552 // (return values > 0 indicate the presence of subimage metadata)
1553 ret = ff_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1555 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1559 bytes_read = bytestream2_tell(&gbytes);
1560 skip_bits(&s->gb, bytes_read << 3);
1567 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1568 id = get_bits_long(&s->gb, 32);
1571 if (id == AV_RB32("mjpg")) {
1573 skip_bits(&s->gb, 32); /* field size */
1574 skip_bits(&s->gb, 32); /* pad field size */
1575 skip_bits(&s->gb, 32); /* next off */
1576 skip_bits(&s->gb, 32); /* quant off */
1577 skip_bits(&s->gb, 32); /* huff off */
1578 skip_bits(&s->gb, 32); /* image off */
1579 skip_bits(&s->gb, 32); /* scan off */
1580 skip_bits(&s->gb, 32); /* data off */
1582 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1583 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1588 /* slow but needed for extreme adobe jpegs */
1590 av_log(s->avctx, AV_LOG_ERROR,
1591 "mjpeg: error, decode_app parser read over the end\n");
1593 skip_bits(&s->gb, 8);
1598 static int mjpeg_decode_com(MJpegDecodeContext *s)
1600 int len = get_bits(&s->gb, 16);
1601 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1602 char *cbuf = av_malloc(len - 1);
1605 for (i = 0; i < len - 2; i++)
1606 cbuf[i] = get_bits(&s->gb, 8);
1607 if (i > 0 && cbuf[i - 1] == '\n')
1612 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1613 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1615 /* buggy avid, it puts EOI only at every 10th frame */
1616 if (!strncmp(cbuf, "AVID", 4)) {
1618 if (len > 14 && cbuf[12] == 1) /* 1 - NTSC, 2 - PAL */
1619 s->interlace_polarity = 1;
1620 } else if (!strcmp(cbuf, "CS=ITU601"))
1622 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32)) ||
1623 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1633 /* return the 8 bit start code value and update the search
1634 state. Return -1 if no start code found */
1635 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1637 const uint8_t *buf_ptr;
1642 buf_ptr = *pbuf_ptr;
1643 while (buf_end - buf_ptr > 1) {
1646 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1655 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1656 *pbuf_ptr = buf_ptr;
1660 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1661 const uint8_t **buf_ptr, const uint8_t *buf_end,
1662 const uint8_t **unescaped_buf_ptr,
1663 int *unescaped_buf_size)
1666 start_code = find_marker(buf_ptr, buf_end);
1668 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1670 return AVERROR(ENOMEM);
1672 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1673 if (start_code == SOS && !s->ls) {
1674 const uint8_t *src = *buf_ptr;
1675 uint8_t *dst = s->buffer;
1677 while (src < buf_end) {
1678 uint8_t x = *(src++);
1681 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1683 while (src < buf_end && x == 0xff)
1686 if (x >= 0xd0 && x <= 0xd7)
1693 *unescaped_buf_ptr = s->buffer;
1694 *unescaped_buf_size = dst - s->buffer;
1695 memset(s->buffer + *unescaped_buf_size, 0,
1696 FF_INPUT_BUFFER_PADDING_SIZE);
1698 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1699 (buf_end - *buf_ptr) - (dst - s->buffer));
1700 } else if (start_code == SOS && s->ls) {
1701 const uint8_t *src = *buf_ptr;
1702 uint8_t *dst = s->buffer;
1710 while (src + t < buf_end) {
1711 uint8_t x = src[t++];
1713 while ((src + t < buf_end) && x == 0xff)
1722 init_put_bits(&pb, dst, t);
1724 /* unescape bitstream */
1726 uint8_t x = src[b++];
1727 put_bits(&pb, 8, x);
1730 put_bits(&pb, 7, x);
1734 flush_put_bits(&pb);
1736 *unescaped_buf_ptr = dst;
1737 *unescaped_buf_size = (bit_count + 7) >> 3;
1738 memset(s->buffer + *unescaped_buf_size, 0,
1739 FF_INPUT_BUFFER_PADDING_SIZE);
1741 *unescaped_buf_ptr = *buf_ptr;
1742 *unescaped_buf_size = buf_end - *buf_ptr;
1748 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1751 const uint8_t *buf = avpkt->data;
1752 int buf_size = avpkt->size;
1753 MJpegDecodeContext *s = avctx->priv_data;
1754 const uint8_t *buf_end, *buf_ptr;
1755 const uint8_t *unescaped_buf_ptr;
1757 int unescaped_buf_size;
1762 av_dict_free(&s->exif_metadata);
1765 buf_end = buf + buf_size;
1766 while (buf_ptr < buf_end) {
1767 /* find start next marker */
1768 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1770 &unescaped_buf_size);
1772 if (start_code < 0) {
1774 } else if (unescaped_buf_size > INT_MAX / 8) {
1775 av_log(avctx, AV_LOG_ERROR,
1776 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1777 start_code, unescaped_buf_size, buf_size);
1778 return AVERROR_INVALIDDATA;
1780 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1781 start_code, buf_end - buf_ptr);
1783 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
1786 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
1790 s->start_code = start_code;
1791 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1792 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1794 /* process markers */
1795 if (start_code >= 0xd0 && start_code <= 0xd7)
1796 av_log(avctx, AV_LOG_DEBUG,
1797 "restart marker: %d\n", start_code & 0x0f);
1799 else if (start_code >= APP0 && start_code <= APP15)
1800 mjpeg_decode_app(s);
1802 else if (start_code == COM)
1803 mjpeg_decode_com(s);
1807 if (!CONFIG_JPEGLS_DECODER &&
1808 (start_code == SOF48 || start_code == LSE)) {
1809 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
1810 return AVERROR(ENOSYS);
1813 switch (start_code) {
1815 s->restart_interval = 0;
1816 s->restart_count = 0;
1817 /* nothing to do on SOI */
1820 ff_mjpeg_decode_dqt(s);
1823 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1824 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1833 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1840 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1847 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1854 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1858 if (!CONFIG_JPEGLS_DECODER ||
1859 (ret = ff_jpegls_decode_lse(s)) < 0)
1865 if (!s->got_picture) {
1866 av_log(avctx, AV_LOG_WARNING,
1867 "Found EOI before any SOF, ignoring\n");
1870 if (s->interlaced) {
1871 s->bottom_field ^= 1;
1872 /* if not bottom field, do not output image yet */
1873 if (s->bottom_field == !s->interlace_polarity)
1876 if ((ret = av_frame_ref(data, s->picture_ptr)) < 0)
1882 int qp = FFMAX3(s->qscale[0],
1885 int qpw = (s->width + 15) / 16;
1886 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
1888 memset(qp_table_buf->data, qp, qpw);
1889 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
1892 if(avctx->debug & FF_DEBUG_QP)
1893 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
1898 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1899 (avctx->err_recognition & AV_EF_EXPLODE))
1903 mjpeg_decode_dri(s);
1915 av_log(avctx, AV_LOG_ERROR,
1916 "mjpeg: unsupported coding type (%x)\n", start_code);
1920 /* eof process start code */
1921 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1922 av_log(avctx, AV_LOG_DEBUG,
1923 "marker parser used %d bytes (%d bits)\n",
1924 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1926 if (s->got_picture) {
1927 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1930 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1931 return AVERROR_INVALIDDATA;
1937 uint8_t *line = s->picture_ptr->data[s->upscale_h];
1938 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
1939 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1940 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
1941 avctx->pix_fmt == AV_PIX_FMT_YUV440P);
1942 for (i = 0; i < s->chroma_height; i++) {
1943 for (index = s->width - 1; index; index--)
1944 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
1945 line += s->linesize[s->upscale_h];
1949 uint8_t *dst = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(s->height - 1) * s->linesize[s->upscale_v]];
1951 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
1952 w = s->width >> hshift;
1953 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
1954 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1955 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
1956 avctx->pix_fmt == AV_PIX_FMT_YUV422P);
1957 for (i = s->height - 1; i; i--) {
1958 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[i / 2 * s->linesize[s->upscale_v]];
1959 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(i + 1) / 2 * s->linesize[s->upscale_v]];
1961 memcpy(dst, src1, w);
1963 for (index = 0; index < w; index++)
1964 dst[index] = (src1[index] + src2[index]) >> 1;
1966 dst -= s->linesize[s->upscale_v];
1969 if (s->flipped && (s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
1971 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
1972 for (index=0; index<4; index++) {
1973 uint8_t *dst = s->picture_ptr->data[index];
1976 if(index && index<3){
1977 w = FF_CEIL_RSHIFT(w, hshift);
1978 h = FF_CEIL_RSHIFT(h, vshift);
1981 uint8_t *dst2 = dst + s->linesize[index]*(h-1);
1982 for (i=0; i<h/2; i++) {
1984 FFSWAP(int, dst[j], dst2[j]);
1985 dst += s->linesize[index];
1986 dst2 -= s->linesize[index];
1992 av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
1993 av_dict_free(&s->exif_metadata);
1995 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %td bytes\n",
1997 // return buf_end - buf_ptr;
1998 return buf_ptr - buf;
2001 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2003 MJpegDecodeContext *s = avctx->priv_data;
2006 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2007 av_log(avctx, AV_LOG_INFO, "Single field\n");
2011 av_frame_unref(s->picture_ptr);
2014 av_freep(&s->ljpeg_buffer);
2015 s->ljpeg_buffer_size = 0;
2017 for (i = 0; i < 3; i++) {
2018 for (j = 0; j < 4; j++)
2019 ff_free_vlc(&s->vlcs[i][j]);
2021 for (i = 0; i < MAX_COMPONENTS; i++) {
2022 av_freep(&s->blocks[i]);
2023 av_freep(&s->last_nnz[i]);
2025 av_dict_free(&s->exif_metadata);
2029 static void decode_flush(AVCodecContext *avctx)
2031 MJpegDecodeContext *s = avctx->priv_data;
2035 #if CONFIG_MJPEG_DECODER
2036 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2037 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2038 static const AVOption options[] = {
2039 { "extern_huff", "Use external huffman table.",
2040 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
2044 static const AVClass mjpegdec_class = {
2045 .class_name = "MJPEG decoder",
2046 .item_name = av_default_item_name,
2048 .version = LIBAVUTIL_VERSION_INT,
2051 AVCodec ff_mjpeg_decoder = {
2053 .type = AVMEDIA_TYPE_VIDEO,
2054 .id = AV_CODEC_ID_MJPEG,
2055 .priv_data_size = sizeof(MJpegDecodeContext),
2056 .init = ff_mjpeg_decode_init,
2057 .close = ff_mjpeg_decode_end,
2058 .decode = ff_mjpeg_decode_frame,
2059 .flush = decode_flush,
2060 .capabilities = CODEC_CAP_DR1,
2062 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2063 .priv_class = &mjpegdec_class,
2066 #if CONFIG_THP_DECODER
2067 AVCodec ff_thp_decoder = {
2069 .type = AVMEDIA_TYPE_VIDEO,
2070 .id = AV_CODEC_ID_THP,
2071 .priv_data_size = sizeof(MJpegDecodeContext),
2072 .init = ff_mjpeg_decode_init,
2073 .close = ff_mjpeg_decode_end,
2074 .decode = ff_mjpeg_decode_frame,
2075 .flush = decode_flush,
2076 .capabilities = CODEC_CAP_DR1,
2078 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),