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"
38 #include "copy_block.h"
42 #include "jpegtables.h"
45 #include "jpeglsdec.h"
50 #include "bytestream.h"
53 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
54 const uint8_t *val_table, int nb_codes,
55 int use_static, int is_ac)
57 uint8_t huff_size[256] = { 0 };
58 uint16_t huff_code[256];
59 uint16_t huff_sym[256];
62 av_assert0(nb_codes <= 256);
64 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
66 for (i = 0; i < 256; i++)
67 huff_sym[i] = i + 16 * is_ac;
70 huff_sym[0] = 16 * 256;
72 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
73 huff_code, 2, 2, huff_sym, 2, 2, use_static);
76 static int init_default_huffman_tables(MJpegDecodeContext *s)
82 const uint8_t *values;
86 { 0, 0, avpriv_mjpeg_bits_dc_luminance,
87 avpriv_mjpeg_val_dc, 12, 12 },
88 { 0, 1, avpriv_mjpeg_bits_dc_chrominance,
89 avpriv_mjpeg_val_dc, 12, 12 },
90 { 1, 0, avpriv_mjpeg_bits_ac_luminance,
91 avpriv_mjpeg_val_ac_luminance, 251, 162 },
92 { 1, 1, avpriv_mjpeg_bits_ac_chrominance,
93 avpriv_mjpeg_val_ac_chrominance, 251, 162 },
94 { 2, 0, avpriv_mjpeg_bits_ac_luminance,
95 avpriv_mjpeg_val_ac_luminance, 251, 162 },
96 { 2, 1, avpriv_mjpeg_bits_ac_chrominance,
97 avpriv_mjpeg_val_ac_chrominance, 251, 162 },
101 for (i = 0; i < FF_ARRAY_ELEMS(ht); i++) {
102 ret = build_vlc(&s->vlcs[ht[i].class][ht[i].index],
103 ht[i].bits, ht[i].values, ht[i].codes,
104 0, ht[i].class == 1);
108 if (ht[i].class < 2) {
109 memcpy(s->raw_huffman_lengths[ht[i].class][ht[i].index],
111 memcpy(s->raw_huffman_values[ht[i].class][ht[i].index],
112 ht[i].values, ht[i].length);
119 static void parse_avid(MJpegDecodeContext *s, uint8_t *buf, int len)
122 if (len > 14 && buf[12] == 1) /* 1 - NTSC */
123 s->interlace_polarity = 1;
124 if (len > 14 && buf[12] == 2) /* 2 - PAL */
125 s->interlace_polarity = 0;
126 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
127 av_log(s->avctx, AV_LOG_INFO, "AVID: len:%d %d\n", len, len > 14 ? buf[12] : -1);
130 static void init_idct(AVCodecContext *avctx)
132 MJpegDecodeContext *s = avctx->priv_data;
134 ff_idctdsp_init(&s->idsp, avctx);
135 ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
139 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
141 MJpegDecodeContext *s = avctx->priv_data;
144 if (!s->picture_ptr) {
145 s->picture = av_frame_alloc();
147 return AVERROR(ENOMEM);
148 s->picture_ptr = s->picture;
152 ff_blockdsp_init(&s->bdsp, avctx);
153 ff_hpeldsp_init(&s->hdsp, avctx->flags);
158 s->first_picture = 1;
160 s->org_height = avctx->coded_height;
161 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
162 avctx->colorspace = AVCOL_SPC_BT470BG;
163 s->hwaccel_pix_fmt = s->hwaccel_sw_pix_fmt = AV_PIX_FMT_NONE;
165 if ((ret = init_default_huffman_tables(s)) < 0)
168 if (s->extern_huff) {
169 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
170 if ((ret = init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8)) < 0)
172 if (ff_mjpeg_decode_dht(s)) {
173 av_log(avctx, AV_LOG_ERROR,
174 "error using external huffman table, switching back to internal\n");
175 init_default_huffman_tables(s);
178 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
179 s->interlace_polarity = 1; /* bottom field first */
180 av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
181 } else if (avctx->field_order == AV_FIELD_UNKNOWN) {
182 if (avctx->codec_tag == AV_RL32("MJPG"))
183 s->interlace_polarity = 1;
186 if ( avctx->extradata_size > 8
187 && AV_RL32(avctx->extradata) == 0x2C
188 && AV_RL32(avctx->extradata+4) == 0x18) {
189 parse_avid(s, avctx->extradata, avctx->extradata_size);
192 if (avctx->codec->id == AV_CODEC_ID_AMV)
199 /* quantize tables */
200 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
204 len = get_bits(&s->gb, 16) - 2;
206 if (8*len > get_bits_left(&s->gb)) {
207 av_log(s->avctx, AV_LOG_ERROR, "dqt: len %d is too large\n", len);
208 return AVERROR_INVALIDDATA;
212 int pr = get_bits(&s->gb, 4);
214 av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
215 return AVERROR_INVALIDDATA;
217 index = get_bits(&s->gb, 4);
220 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
221 /* read quant table */
222 for (i = 0; i < 64; i++) {
223 s->quant_matrixes[index][i] = get_bits(&s->gb, pr ? 16 : 8);
224 if (s->quant_matrixes[index][i] == 0) {
225 av_log(s->avctx, AV_LOG_ERROR, "dqt: 0 quant value\n");
226 return AVERROR_INVALIDDATA;
230 // XXX FIXME fine-tune, and perhaps add dc too
231 s->qscale[index] = FFMAX(s->quant_matrixes[index][1],
232 s->quant_matrixes[index][8]) >> 1;
233 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
234 index, s->qscale[index]);
235 len -= 1 + 64 * (1+pr);
240 /* decode huffman tables and build VLC decoders */
241 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
243 int len, index, i, class, n, v, code_max;
244 uint8_t bits_table[17];
245 uint8_t val_table[256];
248 len = get_bits(&s->gb, 16) - 2;
250 if (8*len > get_bits_left(&s->gb)) {
251 av_log(s->avctx, AV_LOG_ERROR, "dht: len %d is too large\n", len);
252 return AVERROR_INVALIDDATA;
257 return AVERROR_INVALIDDATA;
258 class = get_bits(&s->gb, 4);
260 return AVERROR_INVALIDDATA;
261 index = get_bits(&s->gb, 4);
263 return AVERROR_INVALIDDATA;
265 for (i = 1; i <= 16; i++) {
266 bits_table[i] = get_bits(&s->gb, 8);
270 if (len < n || n > 256)
271 return AVERROR_INVALIDDATA;
274 for (i = 0; i < n; i++) {
275 v = get_bits(&s->gb, 8);
282 /* build VLC and flush previous vlc if present */
283 ff_free_vlc(&s->vlcs[class][index]);
284 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
285 class, index, code_max + 1);
286 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
287 code_max + 1, 0, class > 0)) < 0)
291 ff_free_vlc(&s->vlcs[2][index]);
292 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
293 code_max + 1, 0, 0)) < 0)
297 for (i = 0; i < 16; i++)
298 s->raw_huffman_lengths[class][index][i] = bits_table[i + 1];
299 for (i = 0; i < 256; i++)
300 s->raw_huffman_values[class][index][i] = val_table[i];
305 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
307 int len, nb_components, i, width, height, bits, ret, size_change;
309 int h_count[MAX_COMPONENTS] = { 0 };
310 int v_count[MAX_COMPONENTS] = { 0 };
313 memset(s->upscale_h, 0, sizeof(s->upscale_h));
314 memset(s->upscale_v, 0, sizeof(s->upscale_v));
316 len = get_bits(&s->gb, 16);
317 bits = get_bits(&s->gb, 8);
319 if (bits > 16 || bits < 1) {
320 av_log(s->avctx, AV_LOG_ERROR, "bits %d is invalid\n", bits);
321 return AVERROR_INVALIDDATA;
324 if (s->avctx->bits_per_raw_sample != bits) {
325 av_log(s->avctx, s->avctx->bits_per_raw_sample > 0 ? AV_LOG_INFO : AV_LOG_DEBUG, "Changing bps from %d to %d\n", s->avctx->bits_per_raw_sample, bits);
326 s->avctx->bits_per_raw_sample = bits;
331 if (bits == 9 && !s->pegasus_rct)
332 s->rct = 1; // FIXME ugly
334 if(s->lossless && s->avctx->lowres){
335 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
339 height = get_bits(&s->gb, 16);
340 width = get_bits(&s->gb, 16);
342 // HACK for odd_height.mov
343 if (s->interlaced && s->width == width && s->height == height + 1)
346 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
347 if (av_image_check_size(width, height, 0, s->avctx) < 0)
348 return AVERROR_INVALIDDATA;
349 if (s->buf_size && (width + 7) / 8 * ((height + 7) / 8) > s->buf_size * 4LL)
350 return AVERROR_INVALIDDATA;
352 nb_components = get_bits(&s->gb, 8);
353 if (nb_components <= 0 ||
354 nb_components > MAX_COMPONENTS)
356 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
357 if (nb_components != s->nb_components) {
358 av_log(s->avctx, AV_LOG_ERROR,
359 "nb_components changing in interlaced picture\n");
360 return AVERROR_INVALIDDATA;
363 if (s->ls && !(bits <= 8 || nb_components == 1)) {
364 avpriv_report_missing_feature(s->avctx,
365 "JPEG-LS that is not <= 8 "
366 "bits/component or 16-bit gray");
367 return AVERROR_PATCHWELCOME;
369 if (len != 8 + 3 * nb_components) {
370 av_log(s->avctx, AV_LOG_ERROR, "decode_sof0: error, len(%d) mismatch %d components\n", len, nb_components);
371 return AVERROR_INVALIDDATA;
374 s->nb_components = nb_components;
377 for (i = 0; i < nb_components; i++) {
379 s->component_id[i] = get_bits(&s->gb, 8) - 1;
380 h_count[i] = get_bits(&s->gb, 4);
381 v_count[i] = get_bits(&s->gb, 4);
382 /* compute hmax and vmax (only used in interleaved case) */
383 if (h_count[i] > s->h_max)
384 s->h_max = h_count[i];
385 if (v_count[i] > s->v_max)
386 s->v_max = v_count[i];
387 s->quant_index[i] = get_bits(&s->gb, 8);
388 if (s->quant_index[i] >= 4) {
389 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
390 return AVERROR_INVALIDDATA;
392 if (!h_count[i] || !v_count[i]) {
393 av_log(s->avctx, AV_LOG_ERROR,
394 "Invalid sampling factor in component %d %d:%d\n",
395 i, h_count[i], v_count[i]);
396 return AVERROR_INVALIDDATA;
399 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
400 i, h_count[i], v_count[i],
401 s->component_id[i], s->quant_index[i]);
403 if ( nb_components == 4
404 && s->component_id[0] == 'C' - 1
405 && s->component_id[1] == 'M' - 1
406 && s->component_id[2] == 'Y' - 1
407 && s->component_id[3] == 'K' - 1)
408 s->adobe_transform = 0;
410 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
411 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
412 return AVERROR_PATCHWELCOME;
415 /* Lossless JPEGs encoded in DNGs are commonly bayer-encoded. They contain 2
416 interleaved components and the width stored in their SOF3 markers is the
417 width of each one. We only output a single component, therefore we need
418 to adjust the output image width. */
419 if (s->lossless == 1 && nb_components == 2) {
424 /* if different size, realloc/alloc picture */
425 if (width != s->width || height != s->height || bits != s->bits ||
426 memcmp(s->h_count, h_count, sizeof(h_count)) ||
427 memcmp(s->v_count, v_count, sizeof(v_count))) {
433 memcpy(s->h_count, h_count, sizeof(h_count));
434 memcpy(s->v_count, v_count, sizeof(v_count));
438 /* test interlaced mode */
439 if (s->first_picture &&
440 (s->multiscope != 2 || s->avctx->time_base.den >= 25 * s->avctx->time_base.num) &&
441 s->org_height != 0 &&
442 s->height < ((s->org_height * 3) / 4)) {
444 s->bottom_field = s->interlace_polarity;
445 s->picture_ptr->interlaced_frame = 1;
446 s->picture_ptr->top_field_first = !s->interlace_polarity;
450 ret = ff_set_dimensions(s->avctx, width, height);
454 s->first_picture = 0;
459 if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
460 if (s->progressive) {
461 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
462 return AVERROR_INVALIDDATA;
465 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
467 else if (!s->lossless)
469 /* XXX: not complete test ! */
470 pix_fmt_id = ((unsigned)s->h_count[0] << 28) | (s->v_count[0] << 24) |
471 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
472 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
473 (s->h_count[3] << 4) | s->v_count[3];
474 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
475 /* NOTE we do not allocate pictures large enough for the possible
476 * padding of h/v_count being 4 */
477 if (!(pix_fmt_id & 0xD0D0D0D0))
478 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
479 if (!(pix_fmt_id & 0x0D0D0D0D))
480 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
482 for (i = 0; i < 8; i++) {
483 int j = 6 + (i&1) - (i&6);
484 int is = (pix_fmt_id >> (4*i)) & 0xF;
485 int js = (pix_fmt_id >> (4*j)) & 0xF;
487 if (is == 1 && js != 2 && (i < 2 || i > 5))
488 js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
489 if (is == 1 && js != 2 && (i < 2 || i > 5))
490 js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
492 if (is == 1 && js == 2) {
493 if (i & 1) s->upscale_h[j/2] = 1;
494 else s->upscale_v[j/2] = 1;
498 switch (pix_fmt_id) {
499 case 0x11110000: /* for bayer-encoded huffman lossless JPEGs embedded in DNGs */
500 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16LE;
504 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
506 if ( s->adobe_transform == 0
507 || s->component_id[0] == 'R' - 1 && s->component_id[1] == 'G' - 1 && s->component_id[2] == 'B' - 1) {
508 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
510 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
511 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
512 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
515 av_assert0(s->nb_components == 3);
519 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
521 if (s->adobe_transform == 0 && s->bits <= 8) {
522 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
524 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
525 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
528 av_assert0(s->nb_components == 4);
532 if (s->adobe_transform == 0 && s->bits <= 8) {
533 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
534 s->upscale_v[1] = s->upscale_v[2] = 1;
535 s->upscale_h[1] = s->upscale_h[2] = 1;
536 } else if (s->adobe_transform == 2 && s->bits <= 8) {
537 s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
538 s->upscale_v[1] = s->upscale_v[2] = 1;
539 s->upscale_h[1] = s->upscale_h[2] = 1;
540 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
542 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
543 else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
544 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
546 av_assert0(s->nb_components == 4);
552 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
555 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
560 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
563 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
575 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
577 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
584 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
585 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
588 s->upscale_v[0] = s->upscale_v[1] = 1;
590 if (pix_fmt_id == 0x14111100)
591 s->upscale_v[1] = s->upscale_v[2] = 1;
592 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
595 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
599 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
600 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
603 s->upscale_h[0] = s->upscale_h[1] = 1;
605 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
606 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
607 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
613 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
614 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
615 s->upscale_h[1] = s->upscale_h[2] = 2;
619 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
622 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
628 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
629 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
630 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
631 if (pix_fmt_id == 0x42111100) {
634 s->upscale_h[1] = s->upscale_h[2] = 1;
635 } else if (pix_fmt_id == 0x24111100) {
638 s->upscale_v[1] = s->upscale_v[2] = 1;
639 } else if (pix_fmt_id == 0x23111100) {
642 s->upscale_v[1] = s->upscale_v[2] = 2;
646 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
649 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
653 avpriv_report_missing_feature(s->avctx, "Pixel format 0x%x bits:%d", pix_fmt_id, s->bits);
654 memset(s->upscale_h, 0, sizeof(s->upscale_h));
655 memset(s->upscale_v, 0, sizeof(s->upscale_v));
656 return AVERROR_PATCHWELCOME;
658 if ((AV_RB32(s->upscale_h) || AV_RB32(s->upscale_v)) && s->avctx->lowres) {
659 avpriv_report_missing_feature(s->avctx, "Lowres for weird subsampling");
660 return AVERROR_PATCHWELCOME;
662 if ((AV_RB32(s->upscale_h) || AV_RB32(s->upscale_v)) && s->progressive && s->avctx->pix_fmt == AV_PIX_FMT_GBRP) {
663 avpriv_report_missing_feature(s->avctx, "progressive for weird subsampling");
664 return AVERROR_PATCHWELCOME;
667 memset(s->upscale_h, 0, sizeof(s->upscale_h));
668 memset(s->upscale_v, 0, sizeof(s->upscale_v));
669 if (s->nb_components == 3) {
670 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
671 } else if (s->nb_components != 1) {
672 av_log(s->avctx, AV_LOG_ERROR, "Unsupported number of components %d\n", s->nb_components);
673 return AVERROR_PATCHWELCOME;
674 } else if (s->palette_index && s->bits <= 8)
675 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
676 else if (s->bits <= 8)
677 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
679 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
682 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
684 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
688 if (s->avctx->pix_fmt == s->hwaccel_sw_pix_fmt && !size_change) {
689 s->avctx->pix_fmt = s->hwaccel_pix_fmt;
691 enum AVPixelFormat pix_fmts[] = {
692 #if CONFIG_MJPEG_NVDEC_HWACCEL
695 #if CONFIG_MJPEG_VAAPI_HWACCEL
701 s->hwaccel_pix_fmt = ff_get_format(s->avctx, pix_fmts);
702 if (s->hwaccel_pix_fmt < 0)
703 return AVERROR(EINVAL);
705 s->hwaccel_sw_pix_fmt = s->avctx->pix_fmt;
706 s->avctx->pix_fmt = s->hwaccel_pix_fmt;
709 if (s->avctx->skip_frame == AVDISCARD_ALL) {
710 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
711 s->picture_ptr->key_frame = 1;
716 av_frame_unref(s->picture_ptr);
717 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
719 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
720 s->picture_ptr->key_frame = 1;
723 for (i = 0; i < 4; i++)
724 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
726 ff_dlog(s->avctx, "%d %d %d %d %d %d\n",
727 s->width, s->height, s->linesize[0], s->linesize[1],
728 s->interlaced, s->avctx->height);
732 if ((s->rgb && !s->lossless && !s->ls) ||
733 (!s->rgb && s->ls && s->nb_components > 1) ||
734 (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 && !s->ls)
736 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
737 return AVERROR_PATCHWELCOME;
740 /* totally blank picture as progressive JPEG will only add details to it */
741 if (s->progressive) {
742 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
743 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
744 for (i = 0; i < s->nb_components; i++) {
745 int size = bw * bh * s->h_count[i] * s->v_count[i];
746 av_freep(&s->blocks[i]);
747 av_freep(&s->last_nnz[i]);
748 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
749 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
750 if (!s->blocks[i] || !s->last_nnz[i])
751 return AVERROR(ENOMEM);
752 s->block_stride[i] = bw * s->h_count[i];
754 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
757 if (s->avctx->hwaccel) {
758 s->hwaccel_picture_private =
759 av_mallocz(s->avctx->hwaccel->frame_priv_data_size);
760 if (!s->hwaccel_picture_private)
761 return AVERROR(ENOMEM);
763 ret = s->avctx->hwaccel->start_frame(s->avctx, s->raw_image_buffer,
764 s->raw_image_buffer_size);
772 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
775 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
776 if (code < 0 || code > 16) {
777 av_log(s->avctx, AV_LOG_WARNING,
778 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
779 0, dc_index, &s->vlcs[0][dc_index]);
784 return get_xbits(&s->gb, code);
789 /* decode block and dequantize */
790 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
791 int dc_index, int ac_index, uint16_t *quant_matrix)
793 int code, i, j, level, val;
796 val = mjpeg_decode_dc(s, dc_index);
797 if (val == 0xfffff) {
798 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
799 return AVERROR_INVALIDDATA;
801 val = val * (unsigned)quant_matrix[0] + s->last_dc[component];
802 val = av_clip_int16(val);
803 s->last_dc[component] = val;
807 {OPEN_READER(re, &s->gb);
809 UPDATE_CACHE(re, &s->gb);
810 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
812 i += ((unsigned)code) >> 4;
815 if (code > MIN_CACHE_BITS - 16)
816 UPDATE_CACHE(re, &s->gb);
819 int cache = GET_CACHE(re, &s->gb);
820 int sign = (~cache) >> 31;
821 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
824 LAST_SKIP_BITS(re, &s->gb, code);
827 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
828 return AVERROR_INVALIDDATA;
830 j = s->scantable.permutated[i];
831 block[j] = level * quant_matrix[i];
834 CLOSE_READER(re, &s->gb);}
839 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
840 int component, int dc_index,
841 uint16_t *quant_matrix, int Al)
844 s->bdsp.clear_block(block);
845 val = mjpeg_decode_dc(s, dc_index);
846 if (val == 0xfffff) {
847 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
848 return AVERROR_INVALIDDATA;
850 val = (val * (quant_matrix[0] << Al)) + s->last_dc[component];
851 s->last_dc[component] = val;
856 /* decode block and dequantize - progressive JPEG version */
857 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
858 uint8_t *last_nnz, int ac_index,
859 uint16_t *quant_matrix,
860 int ss, int se, int Al, int *EOBRUN)
862 int code, i, j, val, run;
871 OPEN_READER(re, &s->gb);
872 for (i = ss; ; i++) {
873 UPDATE_CACHE(re, &s->gb);
874 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
876 run = ((unsigned) code) >> 4;
880 if (code > MIN_CACHE_BITS - 16)
881 UPDATE_CACHE(re, &s->gb);
884 int cache = GET_CACHE(re, &s->gb);
885 int sign = (~cache) >> 31;
886 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
889 LAST_SKIP_BITS(re, &s->gb, code);
893 j = s->scantable.permutated[se];
894 block[j] = level * (quant_matrix[se] << Al);
897 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
898 return AVERROR_INVALIDDATA;
900 j = s->scantable.permutated[i];
901 block[j] = level * (quant_matrix[i] << Al);
903 if (run == 0xF) {// ZRL - skip 15 coefficients
906 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
907 return AVERROR_INVALIDDATA;
912 UPDATE_CACHE(re, &s->gb);
913 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
914 LAST_SKIP_BITS(re, &s->gb, run);
921 CLOSE_READER(re, &s->gb);
930 #define REFINE_BIT(j) { \
931 UPDATE_CACHE(re, &s->gb); \
932 sign = block[j] >> 15; \
933 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
934 ((quant_matrix[i] ^ sign) - sign) << Al; \
935 LAST_SKIP_BITS(re, &s->gb, 1); \
943 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
948 j = s->scantable.permutated[i]; \
951 else if (run-- == 0) \
955 /* decode block and dequantize - progressive JPEG refinement pass */
956 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
958 int ac_index, uint16_t *quant_matrix,
959 int ss, int se, int Al, int *EOBRUN)
961 int code, i = ss, j, sign, val, run;
962 int last = FFMIN(se, *last_nnz);
964 OPEN_READER(re, &s->gb);
969 UPDATE_CACHE(re, &s->gb);
970 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
973 run = ((unsigned) code) >> 4;
974 UPDATE_CACHE(re, &s->gb);
975 val = SHOW_UBITS(re, &s->gb, 1);
976 LAST_SKIP_BITS(re, &s->gb, 1);
978 j = s->scantable.permutated[i];
980 block[j] = ((quant_matrix[i] << Al) ^ val) - val;
984 CLOSE_READER(re, &s->gb);
988 run = ((unsigned) code) >> 4;
995 UPDATE_CACHE(re, &s->gb);
996 run += SHOW_UBITS(re, &s->gb, val);
997 LAST_SKIP_BITS(re, &s->gb, val);
1009 for (; i <= last; i++) {
1010 j = s->scantable.permutated[i];
1014 CLOSE_READER(re, &s->gb);
1021 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
1026 if (s->restart_interval) {
1028 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
1029 align_get_bits(&s->gb);
1030 for (i = 0; i < nb_components; i++) /* reset dc */
1031 s->last_dc[i] = (4 << s->bits);
1034 i = 8 + ((-get_bits_count(&s->gb)) & 7);
1036 if (s->restart_count == 0) {
1037 if( show_bits(&s->gb, i) == (1 << i) - 1
1038 || show_bits(&s->gb, i) == 0xFF) {
1039 int pos = get_bits_count(&s->gb);
1040 align_get_bits(&s->gb);
1041 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
1042 skip_bits(&s->gb, 8);
1043 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
1044 for (i = 0; i < nb_components; i++) /* reset dc */
1045 s->last_dc[i] = (4 << s->bits);
1048 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
1055 /* Handles 1 to 4 components */
1056 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
1060 uint16_t (*buffer)[4];
1061 int left[4], top[4], topleft[4];
1062 const int linesize = s->linesize[0];
1063 const int mask = ((1 << s->bits) - 1) << point_transform;
1064 int resync_mb_y = 0;
1065 int resync_mb_x = 0;
1068 if (s->nb_components <= 0 || s->nb_components > 4)
1069 return AVERROR_INVALIDDATA;
1070 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
1071 return AVERROR_INVALIDDATA;
1074 s->restart_count = s->restart_interval;
1076 if (s->restart_interval == 0)
1077 s->restart_interval = INT_MAX;
1080 width = s->mb_width / nb_components; /* Interleaved, width stored is the total so need to divide */
1082 width = s->mb_width;
1084 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size, width * 4 * sizeof(s->ljpeg_buffer[0][0]));
1085 if (!s->ljpeg_buffer)
1086 return AVERROR(ENOMEM);
1088 buffer = s->ljpeg_buffer;
1090 for (i = 0; i < 4; i++)
1091 buffer[0][i] = 1 << (s->bits - 1);
1093 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1094 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
1096 if (s->interlaced && s->bottom_field)
1097 ptr += linesize >> 1;
1099 for (i = 0; i < 4; i++)
1100 top[i] = left[i] = topleft[i] = buffer[0][i];
1102 if ((mb_y * s->width) % s->restart_interval == 0) {
1103 for (i = 0; i < 6; i++)
1104 vpred[i] = 1 << (s->bits-1);
1107 for (mb_x = 0; mb_x < width; mb_x++) {
1108 int modified_predictor = predictor;
1110 if (get_bits_left(&s->gb) < 1) {
1111 av_log(s->avctx, AV_LOG_ERROR, "bitstream end in rgb_scan\n");
1112 return AVERROR_INVALIDDATA;
1115 if (s->restart_interval && !s->restart_count){
1116 s->restart_count = s->restart_interval;
1120 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
1122 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
1123 modified_predictor = 1;
1125 for (i=0;i<nb_components;i++) {
1128 topleft[i] = top[i];
1129 top[i] = buffer[mb_x][i];
1131 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1135 if (!s->bayer || mb_x) {
1137 } else { /* This path runs only for the first line in bayer images */
1139 pred = vpred[i] - dc;
1142 PREDICT(pred, topleft[i], top[i], pred, modified_predictor);
1144 left[i] = buffer[mb_x][i] =
1145 mask & (pred + (unsigned)(dc * (1 << point_transform)));
1148 if (s->restart_interval && !--s->restart_count) {
1149 align_get_bits(&s->gb);
1150 skip_bits(&s->gb, 16); /* skip RSTn */
1153 if (s->rct && s->nb_components == 4) {
1154 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1155 ptr[4*mb_x + 2] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1156 ptr[4*mb_x + 1] = buffer[mb_x][1] + ptr[4*mb_x + 2];
1157 ptr[4*mb_x + 3] = buffer[mb_x][2] + ptr[4*mb_x + 2];
1158 ptr[4*mb_x + 0] = buffer[mb_x][3];
1160 } else if (s->nb_components == 4) {
1161 for(i=0; i<nb_components; i++) {
1162 int c= s->comp_index[i];
1164 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1165 ptr[4*mb_x+3-c] = buffer[mb_x][i];
1167 } else if(s->bits == 9) {
1168 return AVERROR_PATCHWELCOME;
1170 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1171 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
1175 } else if (s->rct) {
1176 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1177 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1178 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1179 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1181 } else if (s->pegasus_rct) {
1182 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1183 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
1184 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1185 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1187 } else if (s->bayer && nb_components == 2) {
1188 for (mb_x = 0; mb_x < width; mb_x++) {
1189 ((uint16_t*)ptr)[2*mb_x + 0] = buffer[mb_x][0];
1190 ((uint16_t*)ptr)[2*mb_x + 1] = buffer[mb_x][1];
1193 for(i=0; i<nb_components; i++) {
1194 int c= s->comp_index[i];
1196 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1197 ptr[3*mb_x+2-c] = buffer[mb_x][i];
1199 } else if(s->bits == 9) {
1200 return AVERROR_PATCHWELCOME;
1202 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1203 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
1212 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1213 int point_transform, int nb_components)
1215 int i, mb_x, mb_y, mask;
1216 int bits= (s->bits+7)&~7;
1217 int resync_mb_y = 0;
1218 int resync_mb_x = 0;
1220 point_transform += bits - s->bits;
1221 mask = ((1 << s->bits) - 1) << point_transform;
1223 av_assert0(nb_components>=1 && nb_components<=4);
1225 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1226 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1227 if (get_bits_left(&s->gb) < 1) {
1228 av_log(s->avctx, AV_LOG_ERROR, "bitstream end in yuv_scan\n");
1229 return AVERROR_INVALIDDATA;
1231 if (s->restart_interval && !s->restart_count){
1232 s->restart_count = s->restart_interval;
1237 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1238 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1239 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1240 for (i = 0; i < nb_components; i++) {
1243 int n, h, v, x, y, c, j, linesize;
1244 n = s->nb_blocks[i];
1245 c = s->comp_index[i];
1250 linesize= s->linesize[c];
1252 if(bits>8) linesize /= 2;
1254 for(j=0; j<n; j++) {
1257 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1260 if ( h * mb_x + x >= s->width
1261 || v * mb_y + y >= s->height) {
1263 } else if (bits<=8) {
1264 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1266 if(x==0 && leftcol){
1267 pred= 1 << (bits - 1);
1272 if(x==0 && leftcol){
1273 pred= ptr[-linesize];
1275 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1279 if (s->interlaced && s->bottom_field)
1280 ptr += linesize >> 1;
1282 *ptr= pred + ((unsigned)dc << point_transform);
1284 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1286 if(x==0 && leftcol){
1287 pred= 1 << (bits - 1);
1292 if(x==0 && leftcol){
1293 pred= ptr16[-linesize];
1295 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1299 if (s->interlaced && s->bottom_field)
1300 ptr16 += linesize >> 1;
1302 *ptr16= pred + ((unsigned)dc << point_transform);
1311 for (i = 0; i < nb_components; i++) {
1314 int n, h, v, x, y, c, j, linesize, dc;
1315 n = s->nb_blocks[i];
1316 c = s->comp_index[i];
1321 linesize = s->linesize[c];
1323 if(bits>8) linesize /= 2;
1325 for (j = 0; j < n; j++) {
1328 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1331 if ( h * mb_x + x >= s->width
1332 || v * mb_y + y >= s->height) {
1334 } else if (bits<=8) {
1335 ptr = s->picture_ptr->data[c] +
1336 (linesize * (v * mb_y + y)) +
1337 (h * mb_x + x); //FIXME optimize this crap
1338 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1341 *ptr = pred + ((unsigned)dc << point_transform);
1343 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1344 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1347 *ptr16= pred + ((unsigned)dc << point_transform);
1357 if (s->restart_interval && !--s->restart_count) {
1358 align_get_bits(&s->gb);
1359 skip_bits(&s->gb, 16); /* skip RSTn */
1366 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1367 uint8_t *dst, const uint8_t *src,
1368 int linesize, int lowres)
1371 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1373 case 1: copy_block4(dst, src, linesize, linesize, 4);
1375 case 2: copy_block2(dst, src, linesize, linesize, 2);
1377 case 3: *dst = *src;
1382 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1384 int block_x, block_y;
1385 int size = 8 >> s->avctx->lowres;
1387 for (block_y=0; block_y<size; block_y++)
1388 for (block_x=0; block_x<size; block_x++)
1389 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1391 for (block_y=0; block_y<size; block_y++)
1392 for (block_x=0; block_x<size; block_x++)
1393 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1397 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1398 int Al, const uint8_t *mb_bitmask,
1399 int mb_bitmask_size,
1400 const AVFrame *reference)
1402 int i, mb_x, mb_y, chroma_h_shift, chroma_v_shift, chroma_width, chroma_height;
1403 uint8_t *data[MAX_COMPONENTS];
1404 const uint8_t *reference_data[MAX_COMPONENTS];
1405 int linesize[MAX_COMPONENTS];
1406 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1407 int bytes_per_pixel = 1 + (s->bits > 8);
1410 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1411 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1412 return AVERROR_INVALIDDATA;
1414 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1417 s->restart_count = 0;
1419 av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &chroma_h_shift,
1421 chroma_width = AV_CEIL_RSHIFT(s->width, chroma_h_shift);
1422 chroma_height = AV_CEIL_RSHIFT(s->height, chroma_v_shift);
1424 for (i = 0; i < nb_components; i++) {
1425 int c = s->comp_index[i];
1426 data[c] = s->picture_ptr->data[c];
1427 reference_data[c] = reference ? reference->data[c] : NULL;
1428 linesize[c] = s->linesize[c];
1429 s->coefs_finished[c] |= 1;
1432 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1433 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1434 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1436 if (s->restart_interval && !s->restart_count)
1437 s->restart_count = s->restart_interval;
1439 if (get_bits_left(&s->gb) < 0) {
1440 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1441 -get_bits_left(&s->gb));
1442 return AVERROR_INVALIDDATA;
1444 for (i = 0; i < nb_components; i++) {
1446 int n, h, v, x, y, c, j;
1448 n = s->nb_blocks[i];
1449 c = s->comp_index[i];
1454 for (j = 0; j < n; j++) {
1455 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1456 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1458 if (s->interlaced && s->bottom_field)
1459 block_offset += linesize[c] >> 1;
1460 if ( 8*(h * mb_x + x) < ((c == 1) || (c == 2) ? chroma_width : s->width)
1461 && 8*(v * mb_y + y) < ((c == 1) || (c == 2) ? chroma_height : s->height)) {
1462 ptr = data[c] + block_offset;
1465 if (!s->progressive) {
1468 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1469 linesize[c], s->avctx->lowres);
1472 s->bdsp.clear_block(s->block);
1473 if (decode_block(s, s->block, i,
1474 s->dc_index[i], s->ac_index[i],
1475 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1476 av_log(s->avctx, AV_LOG_ERROR,
1477 "error y=%d x=%d\n", mb_y, mb_x);
1478 return AVERROR_INVALIDDATA;
1481 s->idsp.idct_put(ptr, linesize[c], s->block);
1483 shift_output(s, ptr, linesize[c]);
1487 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1489 int16_t *block = s->blocks[c][block_idx];
1491 block[0] += get_bits1(&s->gb) *
1492 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1493 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1494 s->quant_matrixes[s->quant_sindex[i]],
1496 av_log(s->avctx, AV_LOG_ERROR,
1497 "error y=%d x=%d\n", mb_y, mb_x);
1498 return AVERROR_INVALIDDATA;
1501 ff_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1502 ff_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1503 mb_x, mb_y, x, y, c, s->bottom_field,
1504 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1512 handle_rstn(s, nb_components);
1518 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1519 int se, int Ah, int Al)
1523 int c = s->comp_index[0];
1524 uint16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1526 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1527 if (se < ss || se > 63) {
1528 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1529 return AVERROR_INVALIDDATA;
1532 // s->coefs_finished is a bitmask for coefficients coded
1533 // ss and se are parameters telling start and end coefficients
1534 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1536 s->restart_count = 0;
1538 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1539 int block_idx = mb_y * s->block_stride[c];
1540 int16_t (*block)[64] = &s->blocks[c][block_idx];
1541 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1542 if (get_bits_left(&s->gb) <= 0) {
1543 av_log(s->avctx, AV_LOG_ERROR, "bitstream truncated in mjpeg_decode_scan_progressive_ac\n");
1544 return AVERROR_INVALIDDATA;
1546 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1548 if (s->restart_interval && !s->restart_count)
1549 s->restart_count = s->restart_interval;
1552 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1553 quant_matrix, ss, se, Al, &EOBRUN);
1555 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1556 quant_matrix, ss, se, Al, &EOBRUN);
1558 av_log(s->avctx, AV_LOG_ERROR,
1559 "error y=%d x=%d\n", mb_y, mb_x);
1560 return AVERROR_INVALIDDATA;
1563 if (handle_rstn(s, 0))
1570 static void mjpeg_idct_scan_progressive_ac(MJpegDecodeContext *s)
1574 const int bytes_per_pixel = 1 + (s->bits > 8);
1575 const int block_size = s->lossless ? 1 : 8;
1577 for (c = 0; c < s->nb_components; c++) {
1578 uint8_t *data = s->picture_ptr->data[c];
1579 int linesize = s->linesize[c];
1580 int h = s->h_max / s->h_count[c];
1581 int v = s->v_max / s->v_count[c];
1582 int mb_width = (s->width + h * block_size - 1) / (h * block_size);
1583 int mb_height = (s->height + v * block_size - 1) / (v * block_size);
1585 if (~s->coefs_finished[c])
1586 av_log(s->avctx, AV_LOG_WARNING, "component %d is incomplete\n", c);
1588 if (s->interlaced && s->bottom_field)
1589 data += linesize >> 1;
1591 for (mb_y = 0; mb_y < mb_height; mb_y++) {
1592 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1593 int block_idx = mb_y * s->block_stride[c];
1594 int16_t (*block)[64] = &s->blocks[c][block_idx];
1595 for (mb_x = 0; mb_x < mb_width; mb_x++, block++) {
1596 s->idsp.idct_put(ptr, linesize, *block);
1598 shift_output(s, ptr, linesize);
1599 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1605 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1606 int mb_bitmask_size, const AVFrame *reference)
1608 int len, nb_components, i, h, v, predictor, point_transform;
1610 const int block_size = s->lossless ? 1 : 8;
1611 int ilv, prev_shift;
1613 if (!s->got_picture) {
1614 av_log(s->avctx, AV_LOG_WARNING,
1615 "Can not process SOS before SOF, skipping\n");
1620 if (reference->width != s->picture_ptr->width ||
1621 reference->height != s->picture_ptr->height ||
1622 reference->format != s->picture_ptr->format) {
1623 av_log(s->avctx, AV_LOG_ERROR, "Reference mismatching\n");
1624 return AVERROR_INVALIDDATA;
1628 /* XXX: verify len field validity */
1629 len = get_bits(&s->gb, 16);
1630 nb_components = get_bits(&s->gb, 8);
1631 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1632 avpriv_report_missing_feature(s->avctx,
1633 "decode_sos: nb_components (%d)",
1635 return AVERROR_PATCHWELCOME;
1637 if (len != 6 + 2 * nb_components) {
1638 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1639 return AVERROR_INVALIDDATA;
1641 for (i = 0; i < nb_components; i++) {
1642 id = get_bits(&s->gb, 8) - 1;
1643 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1644 /* find component index */
1645 for (index = 0; index < s->nb_components; index++)
1646 if (id == s->component_id[index])
1648 if (index == s->nb_components) {
1649 av_log(s->avctx, AV_LOG_ERROR,
1650 "decode_sos: index(%d) out of components\n", index);
1651 return AVERROR_INVALIDDATA;
1653 /* Metasoft MJPEG codec has Cb and Cr swapped */
1654 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1655 && nb_components == 3 && s->nb_components == 3 && i)
1658 s->quant_sindex[i] = s->quant_index[index];
1659 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1660 s->h_scount[i] = s->h_count[index];
1661 s->v_scount[i] = s->v_count[index];
1663 if((nb_components == 1 || nb_components == 3) && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1664 index = (index+2)%3;
1666 s->comp_index[i] = index;
1668 s->dc_index[i] = get_bits(&s->gb, 4);
1669 s->ac_index[i] = get_bits(&s->gb, 4);
1671 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1672 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1674 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))
1678 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1679 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1680 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1681 prev_shift = get_bits(&s->gb, 4); /* Ah */
1682 point_transform = get_bits(&s->gb, 4); /* Al */
1684 prev_shift = point_transform = 0;
1686 if (nb_components > 1) {
1687 /* interleaved stream */
1688 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1689 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1690 } else if (!s->ls) { /* skip this for JPEG-LS */
1691 h = s->h_max / s->h_scount[0];
1692 v = s->v_max / s->v_scount[0];
1693 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1694 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1695 s->nb_blocks[0] = 1;
1700 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1701 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1702 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1703 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1704 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1707 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1708 for (i = s->mjpb_skiptosod; i > 0; i--)
1709 skip_bits(&s->gb, 8);
1712 for (i = 0; i < nb_components; i++)
1713 s->last_dc[i] = (4 << s->bits);
1715 if (s->avctx->hwaccel) {
1716 int bytes_to_start = get_bits_count(&s->gb) / 8;
1717 av_assert0(bytes_to_start >= 0 &&
1718 s->raw_scan_buffer_size >= bytes_to_start);
1720 ret = s->avctx->hwaccel->decode_slice(s->avctx,
1721 s->raw_scan_buffer + bytes_to_start,
1722 s->raw_scan_buffer_size - bytes_to_start);
1726 } else if (s->lossless) {
1727 av_assert0(s->picture_ptr == s->picture);
1728 if (CONFIG_JPEGLS_DECODER && s->ls) {
1730 // reset_ls_coding_parameters(s, 0);
1732 if ((ret = ff_jpegls_decode_picture(s, predictor,
1733 point_transform, ilv)) < 0)
1736 if (s->rgb || s->bayer) {
1737 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1740 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1742 nb_components)) < 0)
1747 if (s->progressive && predictor) {
1748 av_assert0(s->picture_ptr == s->picture);
1749 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1751 point_transform)) < 0)
1754 if ((ret = mjpeg_decode_scan(s, nb_components,
1755 prev_shift, point_transform,
1756 mb_bitmask, mb_bitmask_size, reference)) < 0)
1761 if (s->interlaced &&
1762 get_bits_left(&s->gb) > 32 &&
1763 show_bits(&s->gb, 8) == 0xFF) {
1764 GetBitContext bak = s->gb;
1765 align_get_bits(&bak);
1766 if (show_bits(&bak, 16) == 0xFFD1) {
1767 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1769 skip_bits(&s->gb, 16);
1770 s->bottom_field ^= 1;
1779 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1780 return AVERROR_INVALIDDATA;
1783 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1785 if (get_bits(&s->gb, 16) != 4)
1786 return AVERROR_INVALIDDATA;
1787 s->restart_interval = get_bits(&s->gb, 16);
1788 s->restart_count = 0;
1789 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1790 s->restart_interval);
1795 static int mjpeg_decode_app(MJpegDecodeContext *s)
1799 len = get_bits(&s->gb, 16);
1801 return AVERROR_INVALIDDATA;
1802 if (8 * len > get_bits_left(&s->gb))
1803 return AVERROR_INVALIDDATA;
1805 id = get_bits_long(&s->gb, 32);
1808 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1809 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n",
1810 av_fourcc2str(av_bswap32(id)), id, len);
1812 /* Buggy AVID, it puts EOI only at every 10th frame. */
1813 /* Also, this fourcc is used by non-avid files too, it holds some
1814 information, but it's always present in AVID-created files. */
1815 if (id == AV_RB32("AVI1")) {
1821 4bytes field_size_less_padding
1824 i = get_bits(&s->gb, 8); len--;
1825 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1829 if (id == AV_RB32("JFIF")) {
1830 int t_w, t_h, v1, v2;
1833 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1834 v1 = get_bits(&s->gb, 8);
1835 v2 = get_bits(&s->gb, 8);
1836 skip_bits(&s->gb, 8);
1838 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1839 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1840 if ( s->avctx->sample_aspect_ratio.num <= 0
1841 || s->avctx->sample_aspect_ratio.den <= 0) {
1842 s->avctx->sample_aspect_ratio.num = 0;
1843 s->avctx->sample_aspect_ratio.den = 1;
1846 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1847 av_log(s->avctx, AV_LOG_INFO,
1848 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1850 s->avctx->sample_aspect_ratio.num,
1851 s->avctx->sample_aspect_ratio.den);
1855 t_w = get_bits(&s->gb, 8);
1856 t_h = get_bits(&s->gb, 8);
1858 /* skip thumbnail */
1859 if (len -10 - (t_w * t_h * 3) > 0)
1860 len -= t_w * t_h * 3;
1867 if ( id == AV_RB32("Adob")
1869 && show_bits(&s->gb, 8) == 'e'
1870 && show_bits_long(&s->gb, 32) != AV_RB32("e_CM")) {
1871 skip_bits(&s->gb, 8); /* 'e' */
1872 skip_bits(&s->gb, 16); /* version */
1873 skip_bits(&s->gb, 16); /* flags0 */
1874 skip_bits(&s->gb, 16); /* flags1 */
1875 s->adobe_transform = get_bits(&s->gb, 8);
1876 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1877 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1882 if (id == AV_RB32("LJIF")) {
1884 int pegasus_rct = s->pegasus_rct;
1885 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1886 av_log(s->avctx, AV_LOG_INFO,
1887 "Pegasus lossless jpeg header found\n");
1888 skip_bits(&s->gb, 16); /* version ? */
1889 skip_bits(&s->gb, 16); /* unknown always 0? */
1890 skip_bits(&s->gb, 16); /* unknown always 0? */
1891 skip_bits(&s->gb, 16); /* unknown always 0? */
1892 switch (i=get_bits(&s->gb, 8)) {
1902 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1907 if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
1908 av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
1913 s->pegasus_rct = pegasus_rct;
1917 if (id == AV_RL32("colr") && len > 0) {
1918 s->colr = get_bits(&s->gb, 8);
1919 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1920 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1924 if (id == AV_RL32("xfrm") && len > 0) {
1925 s->xfrm = get_bits(&s->gb, 8);
1926 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1927 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1932 /* JPS extension by VRex */
1933 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1934 int flags, layout, type;
1935 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1936 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1938 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1939 skip_bits(&s->gb, 16); len -= 2; /* block length */
1940 skip_bits(&s->gb, 8); /* reserved */
1941 flags = get_bits(&s->gb, 8);
1942 layout = get_bits(&s->gb, 8);
1943 type = get_bits(&s->gb, 8);
1946 av_freep(&s->stereo3d);
1947 s->stereo3d = av_stereo3d_alloc();
1952 s->stereo3d->type = AV_STEREO3D_2D;
1953 } else if (type == 1) {
1956 s->stereo3d->type = AV_STEREO3D_LINES;
1959 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1962 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1965 if (!(flags & 0x04)) {
1966 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1973 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1974 GetByteContext gbytes;
1975 int ret, le, ifd_offset, bytes_read;
1976 const uint8_t *aligned;
1978 skip_bits(&s->gb, 16); // skip padding
1981 // init byte wise reading
1982 aligned = align_get_bits(&s->gb);
1983 bytestream2_init(&gbytes, aligned, len);
1986 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1988 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1990 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1992 // read 0th IFD and store the metadata
1993 // (return values > 0 indicate the presence of subimage metadata)
1994 ret = ff_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1996 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
2000 bytes_read = bytestream2_tell(&gbytes);
2001 skip_bits(&s->gb, bytes_read << 3);
2008 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
2009 id = get_bits_long(&s->gb, 32);
2012 if (id == AV_RB32("mjpg")) {
2015 4bytes pad field size
2023 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2024 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
2028 if (s->start_code == APP2 && id == AV_RB32("ICC_") && len >= 10) {
2031 unsigned nummarkers;
2033 id = get_bits_long(&s->gb, 32);
2034 id2 = get_bits_long(&s->gb, 24);
2036 if (id != AV_RB32("PROF") || id2 != AV_RB24("ILE")) {
2037 av_log(s->avctx, AV_LOG_WARNING, "Invalid ICC_PROFILE header in APP2\n");
2041 skip_bits(&s->gb, 8);
2042 seqno = get_bits(&s->gb, 8);
2045 av_log(s->avctx, AV_LOG_WARNING, "Invalid sequence number in APP2\n");
2049 nummarkers = get_bits(&s->gb, 8);
2051 if (nummarkers == 0) {
2052 av_log(s->avctx, AV_LOG_WARNING, "Invalid number of markers coded in APP2\n");
2054 } else if (s->iccnum != 0 && nummarkers != s->iccnum) {
2055 av_log(s->avctx, AV_LOG_WARNING, "Mistmatch in coded number of ICC markers between markers\n");
2057 } else if (seqno > nummarkers) {
2058 av_log(s->avctx, AV_LOG_WARNING, "Mismatching sequence number and coded number of ICC markers\n");
2062 /* Allocate if this is the first APP2 we've seen. */
2063 if (s->iccnum == 0) {
2064 s->iccdata = av_mallocz(nummarkers * sizeof(*(s->iccdata)));
2065 s->iccdatalens = av_mallocz(nummarkers * sizeof(*(s->iccdatalens)));
2066 if (!s->iccdata || !s->iccdatalens) {
2067 av_log(s->avctx, AV_LOG_ERROR, "Could not allocate ICC data arrays\n");
2068 return AVERROR(ENOMEM);
2070 s->iccnum = nummarkers;
2073 if (s->iccdata[seqno - 1]) {
2074 av_log(s->avctx, AV_LOG_WARNING, "Duplicate ICC sequence number\n");
2078 s->iccdatalens[seqno - 1] = len;
2079 s->iccdata[seqno - 1] = av_malloc(len);
2080 if (!s->iccdata[seqno - 1]) {
2081 av_log(s->avctx, AV_LOG_ERROR, "Could not allocate ICC data buffer\n");
2082 return AVERROR(ENOMEM);
2085 memcpy(s->iccdata[seqno - 1], align_get_bits(&s->gb), len);
2086 skip_bits(&s->gb, len << 3);
2090 if (s->iccread > s->iccnum)
2091 av_log(s->avctx, AV_LOG_WARNING, "Read more ICC markers than are supposed to be coded\n");
2095 /* slow but needed for extreme adobe jpegs */
2097 av_log(s->avctx, AV_LOG_ERROR,
2098 "mjpeg: error, decode_app parser read over the end\n");
2100 skip_bits(&s->gb, 8);
2105 static int mjpeg_decode_com(MJpegDecodeContext *s)
2107 int len = get_bits(&s->gb, 16);
2108 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
2110 char *cbuf = av_malloc(len - 1);
2112 return AVERROR(ENOMEM);
2114 for (i = 0; i < len - 2; i++)
2115 cbuf[i] = get_bits(&s->gb, 8);
2116 if (i > 0 && cbuf[i - 1] == '\n')
2121 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2122 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
2124 /* buggy avid, it puts EOI only at every 10th frame */
2125 if (!strncmp(cbuf, "AVID", 4)) {
2126 parse_avid(s, cbuf, len);
2127 } else if (!strcmp(cbuf, "CS=ITU601"))
2129 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
2130 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
2132 else if (!strcmp(cbuf, "MULTISCOPE II")) {
2133 s->avctx->sample_aspect_ratio = (AVRational) { 1, 2 };
2143 /* return the 8 bit start code value and update the search
2144 state. Return -1 if no start code found */
2145 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
2147 const uint8_t *buf_ptr;
2152 buf_ptr = *pbuf_ptr;
2153 while (buf_end - buf_ptr > 1) {
2156 if ((v == 0xff) && (v2 >= SOF0) && (v2 <= COM) && buf_ptr < buf_end) {
2165 ff_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
2166 *pbuf_ptr = buf_ptr;
2170 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
2171 const uint8_t **buf_ptr, const uint8_t *buf_end,
2172 const uint8_t **unescaped_buf_ptr,
2173 int *unescaped_buf_size)
2176 start_code = find_marker(buf_ptr, buf_end);
2178 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
2180 return AVERROR(ENOMEM);
2182 /* unescape buffer of SOS, use special treatment for JPEG-LS */
2183 if (start_code == SOS && !s->ls) {
2184 const uint8_t *src = *buf_ptr;
2185 const uint8_t *ptr = src;
2186 uint8_t *dst = s->buffer;
2188 #define copy_data_segment(skip) do { \
2189 ptrdiff_t length = (ptr - src) - (skip); \
2191 memcpy(dst, src, length); \
2197 if (s->avctx->codec_id == AV_CODEC_ID_THP) {
2199 copy_data_segment(0);
2201 while (ptr < buf_end) {
2202 uint8_t x = *(ptr++);
2206 while (ptr < buf_end && x == 0xff) {
2211 /* 0xFF, 0xFF, ... */
2213 copy_data_segment(skip);
2215 /* decrement src as it is equal to ptr after the
2216 * copy_data_segment macro and we might want to
2217 * copy the current value of x later on */
2221 if (x < RST0 || x > RST7) {
2222 copy_data_segment(1);
2229 copy_data_segment(0);
2231 #undef copy_data_segment
2233 *unescaped_buf_ptr = s->buffer;
2234 *unescaped_buf_size = dst - s->buffer;
2235 memset(s->buffer + *unescaped_buf_size, 0,
2236 AV_INPUT_BUFFER_PADDING_SIZE);
2238 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
2239 (buf_end - *buf_ptr) - (dst - s->buffer));
2240 } else if (start_code == SOS && s->ls) {
2241 const uint8_t *src = *buf_ptr;
2242 uint8_t *dst = s->buffer;
2248 while (src + t < buf_end) {
2249 uint8_t x = src[t++];
2251 while ((src + t < buf_end) && x == 0xff)
2260 init_put_bits(&pb, dst, t);
2262 /* unescape bitstream */
2264 uint8_t x = src[b++];
2265 put_bits(&pb, 8, x);
2266 if (x == 0xFF && b < t) {
2269 av_log(s->avctx, AV_LOG_WARNING, "Invalid escape sequence\n");
2272 put_bits(&pb, 7, x);
2276 flush_put_bits(&pb);
2278 *unescaped_buf_ptr = dst;
2279 *unescaped_buf_size = (bit_count + 7) >> 3;
2280 memset(s->buffer + *unescaped_buf_size, 0,
2281 AV_INPUT_BUFFER_PADDING_SIZE);
2283 *unescaped_buf_ptr = *buf_ptr;
2284 *unescaped_buf_size = buf_end - *buf_ptr;
2290 static void reset_icc_profile(MJpegDecodeContext *s)
2295 for (i = 0; i < s->iccnum; i++)
2296 av_freep(&s->iccdata[i]);
2297 av_freep(&s->iccdata);
2298 av_freep(&s->iccdatalens);
2304 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
2307 AVFrame *frame = data;
2308 const uint8_t *buf = avpkt->data;
2309 int buf_size = avpkt->size;
2310 MJpegDecodeContext *s = avctx->priv_data;
2311 const uint8_t *buf_end, *buf_ptr;
2312 const uint8_t *unescaped_buf_ptr;
2314 int unescaped_buf_size;
2320 s->buf_size = buf_size;
2322 av_dict_free(&s->exif_metadata);
2323 av_freep(&s->stereo3d);
2324 s->adobe_transform = -1;
2327 reset_icc_profile(s);
2330 buf_end = buf + buf_size;
2331 while (buf_ptr < buf_end) {
2332 /* find start next marker */
2333 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
2335 &unescaped_buf_size);
2337 if (start_code < 0) {
2339 } else if (unescaped_buf_size > INT_MAX / 8) {
2340 av_log(avctx, AV_LOG_ERROR,
2341 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
2342 start_code, unescaped_buf_size, buf_size);
2343 return AVERROR_INVALIDDATA;
2345 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
2346 start_code, buf_end - buf_ptr);
2348 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
2351 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
2355 s->start_code = start_code;
2356 if (s->avctx->debug & FF_DEBUG_STARTCODE)
2357 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
2359 /* process markers */
2360 if (start_code >= RST0 && start_code <= RST7) {
2361 av_log(avctx, AV_LOG_DEBUG,
2362 "restart marker: %d\n", start_code & 0x0f);
2364 } else if (start_code >= APP0 && start_code <= APP15) {
2365 if ((ret = mjpeg_decode_app(s)) < 0)
2366 av_log(avctx, AV_LOG_ERROR, "unable to decode APP fields: %s\n",
2369 } else if (start_code == COM) {
2370 ret = mjpeg_decode_com(s);
2373 } else if (start_code == DQT) {
2374 ret = ff_mjpeg_decode_dqt(s);
2381 if (!CONFIG_JPEGLS_DECODER &&
2382 (start_code == SOF48 || start_code == LSE)) {
2383 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
2384 return AVERROR(ENOSYS);
2387 if (avctx->skip_frame == AVDISCARD_ALL) {
2388 switch(start_code) {
2403 switch (start_code) {
2405 s->restart_interval = 0;
2406 s->restart_count = 0;
2407 s->raw_image_buffer = buf_ptr;
2408 s->raw_image_buffer_size = buf_end - buf_ptr;
2409 /* nothing to do on SOI */
2412 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
2413 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
2419 if (start_code == SOF0)
2420 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_BASELINE_DCT;
2422 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_EXTENDED_SEQUENTIAL_DCT;
2426 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2430 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_PROGRESSIVE_DCT;
2434 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2438 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_LOSSLESS;
2439 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2443 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2447 s->avctx->profile = FF_PROFILE_MJPEG_JPEG_LS;
2448 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2452 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2456 if (!CONFIG_JPEGLS_DECODER ||
2457 (ret = ff_jpegls_decode_lse(s)) < 0)
2462 if (!avctx->hwaccel && avctx->skip_frame != AVDISCARD_ALL &&
2463 s->progressive && s->cur_scan && s->got_picture)
2464 mjpeg_idct_scan_progressive_ac(s);
2466 if (!s->got_picture) {
2467 av_log(avctx, AV_LOG_WARNING,
2468 "Found EOI before any SOF, ignoring\n");
2471 if (s->interlaced) {
2472 s->bottom_field ^= 1;
2473 /* if not bottom field, do not output image yet */
2474 if (s->bottom_field == !s->interlace_polarity)
2477 if (avctx->skip_frame == AVDISCARD_ALL) {
2479 goto the_end_no_picture;
2481 if (s->avctx->hwaccel) {
2482 ret = s->avctx->hwaccel->end_frame(s->avctx);
2486 av_freep(&s->hwaccel_picture_private);
2488 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2494 int qp = FFMAX3(s->qscale[0],
2497 int qpw = (s->width + 15) / 16;
2498 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2500 memset(qp_table_buf->data, qp, qpw);
2501 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2504 if(avctx->debug & FF_DEBUG_QP)
2505 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2510 s->raw_scan_buffer = buf_ptr;
2511 s->raw_scan_buffer_size = buf_end - buf_ptr;
2514 if (avctx->skip_frame == AVDISCARD_ALL) {
2515 skip_bits(&s->gb, get_bits_left(&s->gb));
2519 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2520 (avctx->err_recognition & AV_EF_EXPLODE))
2524 if ((ret = mjpeg_decode_dri(s)) < 0)
2537 av_log(avctx, AV_LOG_ERROR,
2538 "mjpeg: unsupported coding type (%x)\n", start_code);
2543 /* eof process start code */
2544 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2545 av_log(avctx, AV_LOG_DEBUG,
2546 "marker parser used %d bytes (%d bits)\n",
2547 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2549 if (s->got_picture && s->cur_scan) {
2550 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2553 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2554 return AVERROR_INVALIDDATA;
2560 is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step > 1;
2562 if (AV_RB32(s->upscale_h)) {
2564 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2565 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2566 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2567 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2568 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2569 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2570 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2571 avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2572 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2573 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2574 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2575 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2577 ret = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2581 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2582 for (p = 0; p<s->nb_components; p++) {
2583 uint8_t *line = s->picture_ptr->data[p];
2586 if (!s->upscale_h[p])
2589 w = AV_CEIL_RSHIFT(w, hshift);
2590 h = AV_CEIL_RSHIFT(h, vshift);
2592 if (s->upscale_v[p] == 1)
2595 for (i = 0; i < h; i++) {
2596 if (s->upscale_h[p] == 1) {
2597 if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2598 else line[w - 1] = line[(w - 1) / 2];
2599 for (index = w - 2; index > 0; index--) {
2601 ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2603 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2605 } else if (s->upscale_h[p] == 2) {
2607 ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 3];
2609 ((uint16_t*)line)[w - 2] = ((uint16_t*)line)[w - 1];
2611 line[w - 1] = line[(w - 1) / 3];
2613 line[w - 2] = line[w - 1];
2615 for (index = w - 3; index > 0; index--) {
2616 line[index] = (line[index / 3] + line[(index + 1) / 3] + line[(index + 2) / 3] + 1) / 3;
2619 line += s->linesize[p];
2623 if (AV_RB32(s->upscale_v)) {
2625 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2626 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2627 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2628 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2629 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2630 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2631 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2632 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2633 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2634 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2635 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2636 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2637 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2639 ret = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2643 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2644 for (p = 0; p < s->nb_components; p++) {
2648 if (!s->upscale_v[p])
2651 w = AV_CEIL_RSHIFT(w, hshift);
2652 h = AV_CEIL_RSHIFT(h, vshift);
2654 dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2655 for (i = h - 1; i; i--) {
2656 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i * s->upscale_v[p] / (s->upscale_v[p] + 1) * s->linesize[p]];
2657 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) * s->upscale_v[p] / (s->upscale_v[p] + 1) * s->linesize[p]];
2658 if (s->upscale_v[p] != 2 && (src1 == src2 || i == h - 1)) {
2659 memcpy(dst, src1, w);
2661 for (index = 0; index < w; index++)
2662 dst[index] = (src1[index] + src2[index]) >> 1;
2664 dst -= s->linesize[p];
2668 if (s->flipped && !s->rgb) {
2670 ret = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2674 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2675 for (index=0; index<s->nb_components; index++) {
2676 uint8_t *dst = s->picture_ptr->data[index];
2677 int w = s->picture_ptr->width;
2678 int h = s->picture_ptr->height;
2679 if(index && index<3){
2680 w = AV_CEIL_RSHIFT(w, hshift);
2681 h = AV_CEIL_RSHIFT(h, vshift);
2684 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2685 for (i=0; i<h/2; i++) {
2687 FFSWAP(int, dst[j], dst2[j]);
2688 dst += s->picture_ptr->linesize[index];
2689 dst2 -= s->picture_ptr->linesize[index];
2694 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2695 int w = s->picture_ptr->width;
2696 int h = s->picture_ptr->height;
2697 av_assert0(s->nb_components == 4);
2698 for (i=0; i<h; i++) {
2701 for (index=0; index<4; index++) {
2702 dst[index] = s->picture_ptr->data[index]
2703 + s->picture_ptr->linesize[index]*i;
2705 for (j=0; j<w; j++) {
2707 int r = dst[0][j] * k;
2708 int g = dst[1][j] * k;
2709 int b = dst[2][j] * k;
2710 dst[0][j] = g*257 >> 16;
2711 dst[1][j] = b*257 >> 16;
2712 dst[2][j] = r*257 >> 16;
2717 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2718 int w = s->picture_ptr->width;
2719 int h = s->picture_ptr->height;
2720 av_assert0(s->nb_components == 4);
2721 for (i=0; i<h; i++) {
2724 for (index=0; index<4; index++) {
2725 dst[index] = s->picture_ptr->data[index]
2726 + s->picture_ptr->linesize[index]*i;
2728 for (j=0; j<w; j++) {
2730 int r = (255 - dst[0][j]) * k;
2731 int g = (128 - dst[1][j]) * k;
2732 int b = (128 - dst[2][j]) * k;
2733 dst[0][j] = r*257 >> 16;
2734 dst[1][j] = (g*257 >> 16) + 128;
2735 dst[2][j] = (b*257 >> 16) + 128;
2742 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2744 stereo->type = s->stereo3d->type;
2745 stereo->flags = s->stereo3d->flags;
2747 av_freep(&s->stereo3d);
2750 if (s->iccnum != 0 && s->iccnum == s->iccread) {
2751 AVFrameSideData *sd;
2756 /* Sum size of all parts. */
2757 for (i = 0; i < s->iccnum; i++)
2758 total_size += s->iccdatalens[i];
2760 sd = av_frame_new_side_data(data, AV_FRAME_DATA_ICC_PROFILE, total_size);
2762 av_log(s->avctx, AV_LOG_ERROR, "Could not allocate frame side data\n");
2763 return AVERROR(ENOMEM);
2766 /* Reassemble the parts, which are now in-order. */
2767 for (i = 0; i < s->iccnum; i++) {
2768 memcpy(sd->data + offset, s->iccdata[i], s->iccdatalens[i]);
2769 offset += s->iccdatalens[i];
2773 av_dict_copy(&((AVFrame *) data)->metadata, s->exif_metadata, 0);
2774 av_dict_free(&s->exif_metadata);
2777 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2779 // return buf_end - buf_ptr;
2780 return buf_ptr - buf;
2783 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2785 MJpegDecodeContext *s = avctx->priv_data;
2788 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2789 av_log(avctx, AV_LOG_INFO, "Single field\n");
2793 av_frame_free(&s->picture);
2794 s->picture_ptr = NULL;
2795 } else if (s->picture_ptr)
2796 av_frame_unref(s->picture_ptr);
2798 av_freep(&s->buffer);
2799 av_freep(&s->stereo3d);
2800 av_freep(&s->ljpeg_buffer);
2801 s->ljpeg_buffer_size = 0;
2803 for (i = 0; i < 3; i++) {
2804 for (j = 0; j < 4; j++)
2805 ff_free_vlc(&s->vlcs[i][j]);
2807 for (i = 0; i < MAX_COMPONENTS; i++) {
2808 av_freep(&s->blocks[i]);
2809 av_freep(&s->last_nnz[i]);
2811 av_dict_free(&s->exif_metadata);
2813 reset_icc_profile(s);
2815 av_freep(&s->hwaccel_picture_private);
2820 static void decode_flush(AVCodecContext *avctx)
2822 MJpegDecodeContext *s = avctx->priv_data;
2826 #if CONFIG_MJPEG_DECODER
2827 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2828 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2829 static const AVOption options[] = {
2830 { "extern_huff", "Use external huffman table.",
2831 OFFSET(extern_huff), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
2835 static const AVClass mjpegdec_class = {
2836 .class_name = "MJPEG decoder",
2837 .item_name = av_default_item_name,
2839 .version = LIBAVUTIL_VERSION_INT,
2842 AVCodec ff_mjpeg_decoder = {
2844 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2845 .type = AVMEDIA_TYPE_VIDEO,
2846 .id = AV_CODEC_ID_MJPEG,
2847 .priv_data_size = sizeof(MJpegDecodeContext),
2848 .init = ff_mjpeg_decode_init,
2849 .close = ff_mjpeg_decode_end,
2850 .decode = ff_mjpeg_decode_frame,
2851 .flush = decode_flush,
2852 .capabilities = AV_CODEC_CAP_DR1,
2854 .priv_class = &mjpegdec_class,
2855 .profiles = NULL_IF_CONFIG_SMALL(ff_mjpeg_profiles),
2856 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
2857 FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2858 .hw_configs = (const AVCodecHWConfigInternal*[]) {
2859 #if CONFIG_MJPEG_NVDEC_HWACCEL
2860 HWACCEL_NVDEC(mjpeg),
2862 #if CONFIG_MJPEG_VAAPI_HWACCEL
2863 HWACCEL_VAAPI(mjpeg),
2869 #if CONFIG_THP_DECODER
2870 AVCodec ff_thp_decoder = {
2872 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2873 .type = AVMEDIA_TYPE_VIDEO,
2874 .id = AV_CODEC_ID_THP,
2875 .priv_data_size = sizeof(MJpegDecodeContext),
2876 .init = ff_mjpeg_decode_init,
2877 .close = ff_mjpeg_decode_end,
2878 .decode = ff_mjpeg_decode_frame,
2879 .flush = decode_flush,
2880 .capabilities = AV_CODEC_CAP_DR1,
2882 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,