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;
416 /* if different size, realloc/alloc picture */
417 if (width != s->width || height != s->height || bits != s->bits ||
418 memcmp(s->h_count, h_count, sizeof(h_count)) ||
419 memcmp(s->v_count, v_count, sizeof(v_count))) {
425 memcpy(s->h_count, h_count, sizeof(h_count));
426 memcpy(s->v_count, v_count, sizeof(v_count));
430 /* test interlaced mode */
431 if (s->first_picture &&
432 (s->multiscope != 2 || s->avctx->time_base.den >= 25 * s->avctx->time_base.num) &&
433 s->org_height != 0 &&
434 s->height < ((s->org_height * 3) / 4)) {
436 s->bottom_field = s->interlace_polarity;
437 s->picture_ptr->interlaced_frame = 1;
438 s->picture_ptr->top_field_first = !s->interlace_polarity;
442 ret = ff_set_dimensions(s->avctx, width, height);
446 s->first_picture = 0;
451 if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
452 if (s->progressive) {
453 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
454 return AVERROR_INVALIDDATA;
457 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
459 else if (!s->lossless)
461 /* XXX: not complete test ! */
462 pix_fmt_id = ((unsigned)s->h_count[0] << 28) | (s->v_count[0] << 24) |
463 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
464 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
465 (s->h_count[3] << 4) | s->v_count[3];
466 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
467 /* NOTE we do not allocate pictures large enough for the possible
468 * padding of h/v_count being 4 */
469 if (!(pix_fmt_id & 0xD0D0D0D0))
470 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
471 if (!(pix_fmt_id & 0x0D0D0D0D))
472 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
474 for (i = 0; i < 8; i++) {
475 int j = 6 + (i&1) - (i&6);
476 int is = (pix_fmt_id >> (4*i)) & 0xF;
477 int js = (pix_fmt_id >> (4*j)) & 0xF;
479 if (is == 1 && js != 2 && (i < 2 || i > 5))
480 js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
481 if (is == 1 && js != 2 && (i < 2 || i > 5))
482 js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
484 if (is == 1 && js == 2) {
485 if (i & 1) s->upscale_h[j/2] = 1;
486 else s->upscale_v[j/2] = 1;
490 switch (pix_fmt_id) {
493 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
495 if ( s->adobe_transform == 0
496 || s->component_id[0] == 'R' - 1 && s->component_id[1] == 'G' - 1 && s->component_id[2] == 'B' - 1) {
497 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
499 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
500 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
501 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
504 av_assert0(s->nb_components == 3);
508 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
510 if (s->adobe_transform == 0 && s->bits <= 8) {
511 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
513 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
514 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
517 av_assert0(s->nb_components == 4);
521 if (s->adobe_transform == 0 && s->bits <= 8) {
522 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
523 s->upscale_v[1] = s->upscale_v[2] = 1;
524 s->upscale_h[1] = s->upscale_h[2] = 1;
525 } else if (s->adobe_transform == 2 && s->bits <= 8) {
526 s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
527 s->upscale_v[1] = s->upscale_v[2] = 1;
528 s->upscale_h[1] = s->upscale_h[2] = 1;
529 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
531 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
532 else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
533 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
535 av_assert0(s->nb_components == 4);
541 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
544 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
549 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
552 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
564 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
566 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
573 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
574 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
577 s->upscale_v[0] = s->upscale_v[1] = 1;
579 if (pix_fmt_id == 0x14111100)
580 s->upscale_v[1] = s->upscale_v[2] = 1;
581 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
584 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
588 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
589 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
592 s->upscale_h[0] = s->upscale_h[1] = 1;
594 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
595 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
596 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
602 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
603 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
604 s->upscale_h[1] = s->upscale_h[2] = 2;
608 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
611 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
617 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
618 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
619 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
620 if (pix_fmt_id == 0x42111100) {
623 s->upscale_h[1] = s->upscale_h[2] = 1;
624 } else if (pix_fmt_id == 0x24111100) {
627 s->upscale_v[1] = s->upscale_v[2] = 1;
628 } else if (pix_fmt_id == 0x23111100) {
631 s->upscale_v[1] = s->upscale_v[2] = 2;
635 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
638 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
642 avpriv_report_missing_feature(s->avctx, "Pixel format 0x%x bits:%d", pix_fmt_id, s->bits);
643 memset(s->upscale_h, 0, sizeof(s->upscale_h));
644 memset(s->upscale_v, 0, sizeof(s->upscale_v));
645 return AVERROR_PATCHWELCOME;
647 if ((AV_RB32(s->upscale_h) || AV_RB32(s->upscale_v)) && s->avctx->lowres) {
648 avpriv_report_missing_feature(s->avctx, "Lowres for weird subsampling");
649 return AVERROR_PATCHWELCOME;
651 if ((AV_RB32(s->upscale_h) || AV_RB32(s->upscale_v)) && s->progressive && s->avctx->pix_fmt == AV_PIX_FMT_GBRP) {
652 avpriv_report_missing_feature(s->avctx, "progressive for weird subsampling");
653 return AVERROR_PATCHWELCOME;
656 memset(s->upscale_h, 0, sizeof(s->upscale_h));
657 memset(s->upscale_v, 0, sizeof(s->upscale_v));
658 if (s->nb_components == 3) {
659 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
660 } else if (s->nb_components != 1) {
661 av_log(s->avctx, AV_LOG_ERROR, "Unsupported number of components %d\n", s->nb_components);
662 return AVERROR_PATCHWELCOME;
663 } else if (s->palette_index && s->bits <= 8)
664 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
665 else if (s->bits <= 8)
666 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
668 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
671 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
673 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
677 if (s->avctx->pix_fmt == s->hwaccel_sw_pix_fmt && !size_change) {
678 s->avctx->pix_fmt = s->hwaccel_pix_fmt;
680 enum AVPixelFormat pix_fmts[] = {
681 #if CONFIG_MJPEG_NVDEC_HWACCEL
684 #if CONFIG_MJPEG_VAAPI_HWACCEL
690 s->hwaccel_pix_fmt = ff_get_format(s->avctx, pix_fmts);
691 if (s->hwaccel_pix_fmt < 0)
692 return AVERROR(EINVAL);
694 s->hwaccel_sw_pix_fmt = s->avctx->pix_fmt;
695 s->avctx->pix_fmt = s->hwaccel_pix_fmt;
698 if (s->avctx->skip_frame == AVDISCARD_ALL) {
699 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
700 s->picture_ptr->key_frame = 1;
705 av_frame_unref(s->picture_ptr);
706 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
708 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
709 s->picture_ptr->key_frame = 1;
712 for (i = 0; i < 4; i++)
713 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
715 ff_dlog(s->avctx, "%d %d %d %d %d %d\n",
716 s->width, s->height, s->linesize[0], s->linesize[1],
717 s->interlaced, s->avctx->height);
721 if ((s->rgb && !s->lossless && !s->ls) ||
722 (!s->rgb && s->ls && s->nb_components > 1) ||
723 (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 && !s->ls)
725 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
726 return AVERROR_PATCHWELCOME;
729 /* totally blank picture as progressive JPEG will only add details to it */
730 if (s->progressive) {
731 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
732 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
733 for (i = 0; i < s->nb_components; i++) {
734 int size = bw * bh * s->h_count[i] * s->v_count[i];
735 av_freep(&s->blocks[i]);
736 av_freep(&s->last_nnz[i]);
737 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
738 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
739 if (!s->blocks[i] || !s->last_nnz[i])
740 return AVERROR(ENOMEM);
741 s->block_stride[i] = bw * s->h_count[i];
743 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
746 if (s->avctx->hwaccel) {
747 s->hwaccel_picture_private =
748 av_mallocz(s->avctx->hwaccel->frame_priv_data_size);
749 if (!s->hwaccel_picture_private)
750 return AVERROR(ENOMEM);
752 ret = s->avctx->hwaccel->start_frame(s->avctx, s->raw_image_buffer,
753 s->raw_image_buffer_size);
761 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
764 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
765 if (code < 0 || code > 16) {
766 av_log(s->avctx, AV_LOG_WARNING,
767 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
768 0, dc_index, &s->vlcs[0][dc_index]);
773 return get_xbits(&s->gb, code);
778 /* decode block and dequantize */
779 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
780 int dc_index, int ac_index, uint16_t *quant_matrix)
782 int code, i, j, level, val;
785 val = mjpeg_decode_dc(s, dc_index);
786 if (val == 0xfffff) {
787 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
788 return AVERROR_INVALIDDATA;
790 val = val * (unsigned)quant_matrix[0] + s->last_dc[component];
791 val = av_clip_int16(val);
792 s->last_dc[component] = val;
796 {OPEN_READER(re, &s->gb);
798 UPDATE_CACHE(re, &s->gb);
799 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
801 i += ((unsigned)code) >> 4;
804 if (code > MIN_CACHE_BITS - 16)
805 UPDATE_CACHE(re, &s->gb);
808 int cache = GET_CACHE(re, &s->gb);
809 int sign = (~cache) >> 31;
810 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
813 LAST_SKIP_BITS(re, &s->gb, code);
816 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
817 return AVERROR_INVALIDDATA;
819 j = s->scantable.permutated[i];
820 block[j] = level * quant_matrix[i];
823 CLOSE_READER(re, &s->gb);}
828 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
829 int component, int dc_index,
830 uint16_t *quant_matrix, int Al)
833 s->bdsp.clear_block(block);
834 val = mjpeg_decode_dc(s, dc_index);
835 if (val == 0xfffff) {
836 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
837 return AVERROR_INVALIDDATA;
839 val = (val * (quant_matrix[0] << Al)) + s->last_dc[component];
840 s->last_dc[component] = val;
845 /* decode block and dequantize - progressive JPEG version */
846 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
847 uint8_t *last_nnz, int ac_index,
848 uint16_t *quant_matrix,
849 int ss, int se, int Al, int *EOBRUN)
851 int code, i, j, val, run;
860 OPEN_READER(re, &s->gb);
861 for (i = ss; ; i++) {
862 UPDATE_CACHE(re, &s->gb);
863 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
865 run = ((unsigned) code) >> 4;
869 if (code > MIN_CACHE_BITS - 16)
870 UPDATE_CACHE(re, &s->gb);
873 int cache = GET_CACHE(re, &s->gb);
874 int sign = (~cache) >> 31;
875 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
878 LAST_SKIP_BITS(re, &s->gb, code);
882 j = s->scantable.permutated[se];
883 block[j] = level * (quant_matrix[se] << Al);
886 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
887 return AVERROR_INVALIDDATA;
889 j = s->scantable.permutated[i];
890 block[j] = level * (quant_matrix[i] << Al);
892 if (run == 0xF) {// ZRL - skip 15 coefficients
895 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
896 return AVERROR_INVALIDDATA;
901 UPDATE_CACHE(re, &s->gb);
902 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
903 LAST_SKIP_BITS(re, &s->gb, run);
910 CLOSE_READER(re, &s->gb);
919 #define REFINE_BIT(j) { \
920 UPDATE_CACHE(re, &s->gb); \
921 sign = block[j] >> 15; \
922 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
923 ((quant_matrix[i] ^ sign) - sign) << Al; \
924 LAST_SKIP_BITS(re, &s->gb, 1); \
932 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
937 j = s->scantable.permutated[i]; \
940 else if (run-- == 0) \
944 /* decode block and dequantize - progressive JPEG refinement pass */
945 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
947 int ac_index, uint16_t *quant_matrix,
948 int ss, int se, int Al, int *EOBRUN)
950 int code, i = ss, j, sign, val, run;
951 int last = FFMIN(se, *last_nnz);
953 OPEN_READER(re, &s->gb);
958 UPDATE_CACHE(re, &s->gb);
959 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
962 run = ((unsigned) code) >> 4;
963 UPDATE_CACHE(re, &s->gb);
964 val = SHOW_UBITS(re, &s->gb, 1);
965 LAST_SKIP_BITS(re, &s->gb, 1);
967 j = s->scantable.permutated[i];
969 block[j] = ((quant_matrix[i] << Al) ^ val) - val;
973 CLOSE_READER(re, &s->gb);
977 run = ((unsigned) code) >> 4;
984 UPDATE_CACHE(re, &s->gb);
985 run += SHOW_UBITS(re, &s->gb, val);
986 LAST_SKIP_BITS(re, &s->gb, val);
998 for (; i <= last; i++) {
999 j = s->scantable.permutated[i];
1003 CLOSE_READER(re, &s->gb);
1010 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
1015 if (s->restart_interval) {
1017 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
1018 align_get_bits(&s->gb);
1019 for (i = 0; i < nb_components; i++) /* reset dc */
1020 s->last_dc[i] = (4 << s->bits);
1023 i = 8 + ((-get_bits_count(&s->gb)) & 7);
1025 if (s->restart_count == 0) {
1026 if( show_bits(&s->gb, i) == (1 << i) - 1
1027 || show_bits(&s->gb, i) == 0xFF) {
1028 int pos = get_bits_count(&s->gb);
1029 align_get_bits(&s->gb);
1030 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
1031 skip_bits(&s->gb, 8);
1032 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
1033 for (i = 0; i < nb_components; i++) /* reset dc */
1034 s->last_dc[i] = (4 << s->bits);
1037 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
1044 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
1047 uint16_t (*buffer)[4];
1048 int left[4], top[4], topleft[4];
1049 const int linesize = s->linesize[0];
1050 const int mask = ((1 << s->bits) - 1) << point_transform;
1051 int resync_mb_y = 0;
1052 int resync_mb_x = 0;
1054 if (s->nb_components != 3 && s->nb_components != 4)
1055 return AVERROR_INVALIDDATA;
1056 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
1057 return AVERROR_INVALIDDATA;
1060 s->restart_count = s->restart_interval;
1062 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
1063 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
1064 if (!s->ljpeg_buffer)
1065 return AVERROR(ENOMEM);
1067 buffer = s->ljpeg_buffer;
1069 for (i = 0; i < 4; i++)
1070 buffer[0][i] = 1 << (s->bits - 1);
1072 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1073 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
1075 if (s->interlaced && s->bottom_field)
1076 ptr += linesize >> 1;
1078 for (i = 0; i < 4; i++)
1079 top[i] = left[i] = topleft[i] = buffer[0][i];
1081 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1082 int modified_predictor = predictor;
1084 if (get_bits_left(&s->gb) < 1) {
1085 av_log(s->avctx, AV_LOG_ERROR, "bitstream end in rgb_scan\n");
1086 return AVERROR_INVALIDDATA;
1089 if (s->restart_interval && !s->restart_count){
1090 s->restart_count = s->restart_interval;
1094 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
1096 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
1097 modified_predictor = 1;
1099 for (i=0;i<nb_components;i++) {
1102 topleft[i] = top[i];
1103 top[i] = buffer[mb_x][i];
1105 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
1107 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1111 left[i] = buffer[mb_x][i] =
1112 mask & (pred + (unsigned)(dc * (1 << point_transform)));
1115 if (s->restart_interval && !--s->restart_count) {
1116 align_get_bits(&s->gb);
1117 skip_bits(&s->gb, 16); /* skip RSTn */
1120 if (s->rct && s->nb_components == 4) {
1121 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1122 ptr[4*mb_x + 2] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1123 ptr[4*mb_x + 1] = buffer[mb_x][1] + ptr[4*mb_x + 2];
1124 ptr[4*mb_x + 3] = buffer[mb_x][2] + ptr[4*mb_x + 2];
1125 ptr[4*mb_x + 0] = buffer[mb_x][3];
1127 } else if (s->nb_components == 4) {
1128 for(i=0; i<nb_components; i++) {
1129 int c= s->comp_index[i];
1131 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1132 ptr[4*mb_x+3-c] = buffer[mb_x][i];
1134 } else if(s->bits == 9) {
1135 return AVERROR_PATCHWELCOME;
1137 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1138 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
1142 } else if (s->rct) {
1143 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1144 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1145 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1146 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1148 } else if (s->pegasus_rct) {
1149 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1150 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
1151 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1152 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1155 for(i=0; i<nb_components; i++) {
1156 int c= s->comp_index[i];
1158 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1159 ptr[3*mb_x+2-c] = buffer[mb_x][i];
1161 } else if(s->bits == 9) {
1162 return AVERROR_PATCHWELCOME;
1164 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1165 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
1174 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1175 int point_transform, int nb_components)
1177 int i, mb_x, mb_y, mask;
1178 int bits= (s->bits+7)&~7;
1179 int resync_mb_y = 0;
1180 int resync_mb_x = 0;
1182 point_transform += bits - s->bits;
1183 mask = ((1 << s->bits) - 1) << point_transform;
1185 av_assert0(nb_components>=1 && nb_components<=4);
1187 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1188 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1189 if (get_bits_left(&s->gb) < 1) {
1190 av_log(s->avctx, AV_LOG_ERROR, "bitstream end in yuv_scan\n");
1191 return AVERROR_INVALIDDATA;
1193 if (s->restart_interval && !s->restart_count){
1194 s->restart_count = s->restart_interval;
1199 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1200 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1201 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1202 for (i = 0; i < nb_components; i++) {
1205 int n, h, v, x, y, c, j, linesize;
1206 n = s->nb_blocks[i];
1207 c = s->comp_index[i];
1212 linesize= s->linesize[c];
1214 if(bits>8) linesize /= 2;
1216 for(j=0; j<n; j++) {
1219 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1222 if ( h * mb_x + x >= s->width
1223 || v * mb_y + y >= s->height) {
1225 } else if (bits<=8) {
1226 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1228 if(x==0 && leftcol){
1229 pred= 1 << (bits - 1);
1234 if(x==0 && leftcol){
1235 pred= ptr[-linesize];
1237 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1241 if (s->interlaced && s->bottom_field)
1242 ptr += linesize >> 1;
1244 *ptr= pred + ((unsigned)dc << point_transform);
1246 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1248 if(x==0 && leftcol){
1249 pred= 1 << (bits - 1);
1254 if(x==0 && leftcol){
1255 pred= ptr16[-linesize];
1257 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1261 if (s->interlaced && s->bottom_field)
1262 ptr16 += linesize >> 1;
1264 *ptr16= pred + ((unsigned)dc << point_transform);
1273 for (i = 0; i < nb_components; i++) {
1276 int n, h, v, x, y, c, j, linesize, dc;
1277 n = s->nb_blocks[i];
1278 c = s->comp_index[i];
1283 linesize = s->linesize[c];
1285 if(bits>8) linesize /= 2;
1287 for (j = 0; j < n; j++) {
1290 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1293 if ( h * mb_x + x >= s->width
1294 || v * mb_y + y >= s->height) {
1296 } else if (bits<=8) {
1297 ptr = s->picture_ptr->data[c] +
1298 (linesize * (v * mb_y + y)) +
1299 (h * mb_x + x); //FIXME optimize this crap
1300 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1303 *ptr = pred + ((unsigned)dc << point_transform);
1305 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1306 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1309 *ptr16= pred + ((unsigned)dc << point_transform);
1319 if (s->restart_interval && !--s->restart_count) {
1320 align_get_bits(&s->gb);
1321 skip_bits(&s->gb, 16); /* skip RSTn */
1328 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1329 uint8_t *dst, const uint8_t *src,
1330 int linesize, int lowres)
1333 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1335 case 1: copy_block4(dst, src, linesize, linesize, 4);
1337 case 2: copy_block2(dst, src, linesize, linesize, 2);
1339 case 3: *dst = *src;
1344 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1346 int block_x, block_y;
1347 int size = 8 >> s->avctx->lowres;
1349 for (block_y=0; block_y<size; block_y++)
1350 for (block_x=0; block_x<size; block_x++)
1351 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1353 for (block_y=0; block_y<size; block_y++)
1354 for (block_x=0; block_x<size; block_x++)
1355 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1359 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1360 int Al, const uint8_t *mb_bitmask,
1361 int mb_bitmask_size,
1362 const AVFrame *reference)
1364 int i, mb_x, mb_y, chroma_h_shift, chroma_v_shift, chroma_width, chroma_height;
1365 uint8_t *data[MAX_COMPONENTS];
1366 const uint8_t *reference_data[MAX_COMPONENTS];
1367 int linesize[MAX_COMPONENTS];
1368 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1369 int bytes_per_pixel = 1 + (s->bits > 8);
1372 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1373 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1374 return AVERROR_INVALIDDATA;
1376 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1379 s->restart_count = 0;
1381 av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &chroma_h_shift,
1383 chroma_width = AV_CEIL_RSHIFT(s->width, chroma_h_shift);
1384 chroma_height = AV_CEIL_RSHIFT(s->height, chroma_v_shift);
1386 for (i = 0; i < nb_components; i++) {
1387 int c = s->comp_index[i];
1388 data[c] = s->picture_ptr->data[c];
1389 reference_data[c] = reference ? reference->data[c] : NULL;
1390 linesize[c] = s->linesize[c];
1391 s->coefs_finished[c] |= 1;
1394 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1395 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1396 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1398 if (s->restart_interval && !s->restart_count)
1399 s->restart_count = s->restart_interval;
1401 if (get_bits_left(&s->gb) < 0) {
1402 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1403 -get_bits_left(&s->gb));
1404 return AVERROR_INVALIDDATA;
1406 for (i = 0; i < nb_components; i++) {
1408 int n, h, v, x, y, c, j;
1410 n = s->nb_blocks[i];
1411 c = s->comp_index[i];
1416 for (j = 0; j < n; j++) {
1417 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1418 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1420 if (s->interlaced && s->bottom_field)
1421 block_offset += linesize[c] >> 1;
1422 if ( 8*(h * mb_x + x) < ((c == 1) || (c == 2) ? chroma_width : s->width)
1423 && 8*(v * mb_y + y) < ((c == 1) || (c == 2) ? chroma_height : s->height)) {
1424 ptr = data[c] + block_offset;
1427 if (!s->progressive) {
1430 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1431 linesize[c], s->avctx->lowres);
1434 s->bdsp.clear_block(s->block);
1435 if (decode_block(s, s->block, i,
1436 s->dc_index[i], s->ac_index[i],
1437 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1438 av_log(s->avctx, AV_LOG_ERROR,
1439 "error y=%d x=%d\n", mb_y, mb_x);
1440 return AVERROR_INVALIDDATA;
1443 s->idsp.idct_put(ptr, linesize[c], s->block);
1445 shift_output(s, ptr, linesize[c]);
1449 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1451 int16_t *block = s->blocks[c][block_idx];
1453 block[0] += get_bits1(&s->gb) *
1454 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1455 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1456 s->quant_matrixes[s->quant_sindex[i]],
1458 av_log(s->avctx, AV_LOG_ERROR,
1459 "error y=%d x=%d\n", mb_y, mb_x);
1460 return AVERROR_INVALIDDATA;
1463 ff_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1464 ff_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1465 mb_x, mb_y, x, y, c, s->bottom_field,
1466 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1474 handle_rstn(s, nb_components);
1480 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1481 int se, int Ah, int Al)
1485 int c = s->comp_index[0];
1486 uint16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1488 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1489 if (se < ss || se > 63) {
1490 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1491 return AVERROR_INVALIDDATA;
1494 // s->coefs_finished is a bitmask for coefficients coded
1495 // ss and se are parameters telling start and end coefficients
1496 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1498 s->restart_count = 0;
1500 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1501 int block_idx = mb_y * s->block_stride[c];
1502 int16_t (*block)[64] = &s->blocks[c][block_idx];
1503 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1504 if (get_bits_left(&s->gb) <= 0) {
1505 av_log(s->avctx, AV_LOG_ERROR, "bitstream truncated in mjpeg_decode_scan_progressive_ac\n");
1506 return AVERROR_INVALIDDATA;
1508 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1510 if (s->restart_interval && !s->restart_count)
1511 s->restart_count = s->restart_interval;
1514 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1515 quant_matrix, ss, se, Al, &EOBRUN);
1517 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1518 quant_matrix, ss, se, Al, &EOBRUN);
1520 av_log(s->avctx, AV_LOG_ERROR,
1521 "error y=%d x=%d\n", mb_y, mb_x);
1522 return AVERROR_INVALIDDATA;
1525 if (handle_rstn(s, 0))
1532 static void mjpeg_idct_scan_progressive_ac(MJpegDecodeContext *s)
1536 const int bytes_per_pixel = 1 + (s->bits > 8);
1537 const int block_size = s->lossless ? 1 : 8;
1539 for (c = 0; c < s->nb_components; c++) {
1540 uint8_t *data = s->picture_ptr->data[c];
1541 int linesize = s->linesize[c];
1542 int h = s->h_max / s->h_count[c];
1543 int v = s->v_max / s->v_count[c];
1544 int mb_width = (s->width + h * block_size - 1) / (h * block_size);
1545 int mb_height = (s->height + v * block_size - 1) / (v * block_size);
1547 if (~s->coefs_finished[c])
1548 av_log(s->avctx, AV_LOG_WARNING, "component %d is incomplete\n", c);
1550 if (s->interlaced && s->bottom_field)
1551 data += linesize >> 1;
1553 for (mb_y = 0; mb_y < mb_height; mb_y++) {
1554 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1555 int block_idx = mb_y * s->block_stride[c];
1556 int16_t (*block)[64] = &s->blocks[c][block_idx];
1557 for (mb_x = 0; mb_x < mb_width; mb_x++, block++) {
1558 s->idsp.idct_put(ptr, linesize, *block);
1560 shift_output(s, ptr, linesize);
1561 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1567 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1568 int mb_bitmask_size, const AVFrame *reference)
1570 int len, nb_components, i, h, v, predictor, point_transform;
1572 const int block_size = s->lossless ? 1 : 8;
1573 int ilv, prev_shift;
1575 if (!s->got_picture) {
1576 av_log(s->avctx, AV_LOG_WARNING,
1577 "Can not process SOS before SOF, skipping\n");
1582 if (reference->width != s->picture_ptr->width ||
1583 reference->height != s->picture_ptr->height ||
1584 reference->format != s->picture_ptr->format) {
1585 av_log(s->avctx, AV_LOG_ERROR, "Reference mismatching\n");
1586 return AVERROR_INVALIDDATA;
1590 /* XXX: verify len field validity */
1591 len = get_bits(&s->gb, 16);
1592 nb_components = get_bits(&s->gb, 8);
1593 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1594 avpriv_report_missing_feature(s->avctx,
1595 "decode_sos: nb_components (%d)",
1597 return AVERROR_PATCHWELCOME;
1599 if (len != 6 + 2 * nb_components) {
1600 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1601 return AVERROR_INVALIDDATA;
1603 for (i = 0; i < nb_components; i++) {
1604 id = get_bits(&s->gb, 8) - 1;
1605 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1606 /* find component index */
1607 for (index = 0; index < s->nb_components; index++)
1608 if (id == s->component_id[index])
1610 if (index == s->nb_components) {
1611 av_log(s->avctx, AV_LOG_ERROR,
1612 "decode_sos: index(%d) out of components\n", index);
1613 return AVERROR_INVALIDDATA;
1615 /* Metasoft MJPEG codec has Cb and Cr swapped */
1616 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1617 && nb_components == 3 && s->nb_components == 3 && i)
1620 s->quant_sindex[i] = s->quant_index[index];
1621 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1622 s->h_scount[i] = s->h_count[index];
1623 s->v_scount[i] = s->v_count[index];
1625 if((nb_components == 1 || nb_components == 3) && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1626 index = (index+2)%3;
1628 s->comp_index[i] = index;
1630 s->dc_index[i] = get_bits(&s->gb, 4);
1631 s->ac_index[i] = get_bits(&s->gb, 4);
1633 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1634 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1636 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))
1640 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1641 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1642 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1643 prev_shift = get_bits(&s->gb, 4); /* Ah */
1644 point_transform = get_bits(&s->gb, 4); /* Al */
1646 prev_shift = point_transform = 0;
1648 if (nb_components > 1) {
1649 /* interleaved stream */
1650 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1651 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1652 } else if (!s->ls) { /* skip this for JPEG-LS */
1653 h = s->h_max / s->h_scount[0];
1654 v = s->v_max / s->v_scount[0];
1655 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1656 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1657 s->nb_blocks[0] = 1;
1662 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1663 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1664 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1665 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1666 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1669 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1670 for (i = s->mjpb_skiptosod; i > 0; i--)
1671 skip_bits(&s->gb, 8);
1674 for (i = 0; i < nb_components; i++)
1675 s->last_dc[i] = (4 << s->bits);
1677 if (s->avctx->hwaccel) {
1678 int bytes_to_start = get_bits_count(&s->gb) / 8;
1679 av_assert0(bytes_to_start >= 0 &&
1680 s->raw_scan_buffer_size >= bytes_to_start);
1682 ret = s->avctx->hwaccel->decode_slice(s->avctx,
1683 s->raw_scan_buffer + bytes_to_start,
1684 s->raw_scan_buffer_size - bytes_to_start);
1688 } else if (s->lossless) {
1689 av_assert0(s->picture_ptr == s->picture);
1690 if (CONFIG_JPEGLS_DECODER && s->ls) {
1692 // reset_ls_coding_parameters(s, 0);
1694 if ((ret = ff_jpegls_decode_picture(s, predictor,
1695 point_transform, ilv)) < 0)
1699 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1702 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1704 nb_components)) < 0)
1709 if (s->progressive && predictor) {
1710 av_assert0(s->picture_ptr == s->picture);
1711 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1713 point_transform)) < 0)
1716 if ((ret = mjpeg_decode_scan(s, nb_components,
1717 prev_shift, point_transform,
1718 mb_bitmask, mb_bitmask_size, reference)) < 0)
1723 if (s->interlaced &&
1724 get_bits_left(&s->gb) > 32 &&
1725 show_bits(&s->gb, 8) == 0xFF) {
1726 GetBitContext bak = s->gb;
1727 align_get_bits(&bak);
1728 if (show_bits(&bak, 16) == 0xFFD1) {
1729 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1731 skip_bits(&s->gb, 16);
1732 s->bottom_field ^= 1;
1741 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1742 return AVERROR_INVALIDDATA;
1745 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1747 if (get_bits(&s->gb, 16) != 4)
1748 return AVERROR_INVALIDDATA;
1749 s->restart_interval = get_bits(&s->gb, 16);
1750 s->restart_count = 0;
1751 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1752 s->restart_interval);
1757 static int mjpeg_decode_app(MJpegDecodeContext *s)
1761 len = get_bits(&s->gb, 16);
1763 return AVERROR_INVALIDDATA;
1764 if (8 * len > get_bits_left(&s->gb))
1765 return AVERROR_INVALIDDATA;
1767 id = get_bits_long(&s->gb, 32);
1770 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1771 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n",
1772 av_fourcc2str(av_bswap32(id)), id, len);
1774 /* Buggy AVID, it puts EOI only at every 10th frame. */
1775 /* Also, this fourcc is used by non-avid files too, it holds some
1776 information, but it's always present in AVID-created files. */
1777 if (id == AV_RB32("AVI1")) {
1783 4bytes field_size_less_padding
1786 i = get_bits(&s->gb, 8); len--;
1787 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1791 if (id == AV_RB32("JFIF")) {
1792 int t_w, t_h, v1, v2;
1795 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1796 v1 = get_bits(&s->gb, 8);
1797 v2 = get_bits(&s->gb, 8);
1798 skip_bits(&s->gb, 8);
1800 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1801 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1802 if ( s->avctx->sample_aspect_ratio.num <= 0
1803 || s->avctx->sample_aspect_ratio.den <= 0) {
1804 s->avctx->sample_aspect_ratio.num = 0;
1805 s->avctx->sample_aspect_ratio.den = 1;
1808 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1809 av_log(s->avctx, AV_LOG_INFO,
1810 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1812 s->avctx->sample_aspect_ratio.num,
1813 s->avctx->sample_aspect_ratio.den);
1817 t_w = get_bits(&s->gb, 8);
1818 t_h = get_bits(&s->gb, 8);
1820 /* skip thumbnail */
1821 if (len -10 - (t_w * t_h * 3) > 0)
1822 len -= t_w * t_h * 3;
1829 if ( id == AV_RB32("Adob")
1831 && show_bits(&s->gb, 8) == 'e'
1832 && show_bits_long(&s->gb, 32) != AV_RB32("e_CM")) {
1833 skip_bits(&s->gb, 8); /* 'e' */
1834 skip_bits(&s->gb, 16); /* version */
1835 skip_bits(&s->gb, 16); /* flags0 */
1836 skip_bits(&s->gb, 16); /* flags1 */
1837 s->adobe_transform = get_bits(&s->gb, 8);
1838 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1839 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1844 if (id == AV_RB32("LJIF")) {
1846 int pegasus_rct = s->pegasus_rct;
1847 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1848 av_log(s->avctx, AV_LOG_INFO,
1849 "Pegasus lossless jpeg header found\n");
1850 skip_bits(&s->gb, 16); /* version ? */
1851 skip_bits(&s->gb, 16); /* unknown always 0? */
1852 skip_bits(&s->gb, 16); /* unknown always 0? */
1853 skip_bits(&s->gb, 16); /* unknown always 0? */
1854 switch (i=get_bits(&s->gb, 8)) {
1864 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1869 if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
1870 av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
1875 s->pegasus_rct = pegasus_rct;
1879 if (id == AV_RL32("colr") && len > 0) {
1880 s->colr = get_bits(&s->gb, 8);
1881 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1882 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1886 if (id == AV_RL32("xfrm") && len > 0) {
1887 s->xfrm = get_bits(&s->gb, 8);
1888 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1889 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1894 /* JPS extension by VRex */
1895 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1896 int flags, layout, type;
1897 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1898 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1900 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1901 skip_bits(&s->gb, 16); len -= 2; /* block length */
1902 skip_bits(&s->gb, 8); /* reserved */
1903 flags = get_bits(&s->gb, 8);
1904 layout = get_bits(&s->gb, 8);
1905 type = get_bits(&s->gb, 8);
1908 av_freep(&s->stereo3d);
1909 s->stereo3d = av_stereo3d_alloc();
1914 s->stereo3d->type = AV_STEREO3D_2D;
1915 } else if (type == 1) {
1918 s->stereo3d->type = AV_STEREO3D_LINES;
1921 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1924 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1927 if (!(flags & 0x04)) {
1928 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1935 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1936 GetByteContext gbytes;
1937 int ret, le, ifd_offset, bytes_read;
1938 const uint8_t *aligned;
1940 skip_bits(&s->gb, 16); // skip padding
1943 // init byte wise reading
1944 aligned = align_get_bits(&s->gb);
1945 bytestream2_init(&gbytes, aligned, len);
1948 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1950 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1952 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1954 // read 0th IFD and store the metadata
1955 // (return values > 0 indicate the presence of subimage metadata)
1956 ret = ff_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1958 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1962 bytes_read = bytestream2_tell(&gbytes);
1963 skip_bits(&s->gb, bytes_read << 3);
1970 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1971 id = get_bits_long(&s->gb, 32);
1974 if (id == AV_RB32("mjpg")) {
1977 4bytes pad field size
1985 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1986 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1990 if (s->start_code == APP2 && id == AV_RB32("ICC_") && len >= 10) {
1993 unsigned nummarkers;
1995 id = get_bits_long(&s->gb, 32);
1996 id2 = get_bits_long(&s->gb, 24);
1998 if (id != AV_RB32("PROF") || id2 != AV_RB24("ILE")) {
1999 av_log(s->avctx, AV_LOG_WARNING, "Invalid ICC_PROFILE header in APP2\n");
2003 skip_bits(&s->gb, 8);
2004 seqno = get_bits(&s->gb, 8);
2007 av_log(s->avctx, AV_LOG_WARNING, "Invalid sequence number in APP2\n");
2011 nummarkers = get_bits(&s->gb, 8);
2013 if (nummarkers == 0) {
2014 av_log(s->avctx, AV_LOG_WARNING, "Invalid number of markers coded in APP2\n");
2016 } else if (s->iccnum != 0 && nummarkers != s->iccnum) {
2017 av_log(s->avctx, AV_LOG_WARNING, "Mistmatch in coded number of ICC markers between markers\n");
2019 } else if (seqno > nummarkers) {
2020 av_log(s->avctx, AV_LOG_WARNING, "Mismatching sequence number and coded number of ICC markers\n");
2024 /* Allocate if this is the first APP2 we've seen. */
2025 if (s->iccnum == 0) {
2026 s->iccdata = av_mallocz(nummarkers * sizeof(*(s->iccdata)));
2027 s->iccdatalens = av_mallocz(nummarkers * sizeof(*(s->iccdatalens)));
2028 if (!s->iccdata || !s->iccdatalens) {
2029 av_log(s->avctx, AV_LOG_ERROR, "Could not allocate ICC data arrays\n");
2030 return AVERROR(ENOMEM);
2032 s->iccnum = nummarkers;
2035 if (s->iccdata[seqno - 1]) {
2036 av_log(s->avctx, AV_LOG_WARNING, "Duplicate ICC sequence number\n");
2040 s->iccdatalens[seqno - 1] = len;
2041 s->iccdata[seqno - 1] = av_malloc(len);
2042 if (!s->iccdata[seqno - 1]) {
2043 av_log(s->avctx, AV_LOG_ERROR, "Could not allocate ICC data buffer\n");
2044 return AVERROR(ENOMEM);
2047 memcpy(s->iccdata[seqno - 1], align_get_bits(&s->gb), len);
2048 skip_bits(&s->gb, len << 3);
2052 if (s->iccread > s->iccnum)
2053 av_log(s->avctx, AV_LOG_WARNING, "Read more ICC markers than are supposed to be coded\n");
2057 /* slow but needed for extreme adobe jpegs */
2059 av_log(s->avctx, AV_LOG_ERROR,
2060 "mjpeg: error, decode_app parser read over the end\n");
2062 skip_bits(&s->gb, 8);
2067 static int mjpeg_decode_com(MJpegDecodeContext *s)
2069 int len = get_bits(&s->gb, 16);
2070 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
2072 char *cbuf = av_malloc(len - 1);
2074 return AVERROR(ENOMEM);
2076 for (i = 0; i < len - 2; i++)
2077 cbuf[i] = get_bits(&s->gb, 8);
2078 if (i > 0 && cbuf[i - 1] == '\n')
2083 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2084 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
2086 /* buggy avid, it puts EOI only at every 10th frame */
2087 if (!strncmp(cbuf, "AVID", 4)) {
2088 parse_avid(s, cbuf, len);
2089 } else if (!strcmp(cbuf, "CS=ITU601"))
2091 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
2092 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
2094 else if (!strcmp(cbuf, "MULTISCOPE II")) {
2095 s->avctx->sample_aspect_ratio = (AVRational) { 1, 2 };
2105 /* return the 8 bit start code value and update the search
2106 state. Return -1 if no start code found */
2107 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
2109 const uint8_t *buf_ptr;
2114 buf_ptr = *pbuf_ptr;
2115 while (buf_end - buf_ptr > 1) {
2118 if ((v == 0xff) && (v2 >= SOF0) && (v2 <= COM) && buf_ptr < buf_end) {
2127 ff_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
2128 *pbuf_ptr = buf_ptr;
2132 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
2133 const uint8_t **buf_ptr, const uint8_t *buf_end,
2134 const uint8_t **unescaped_buf_ptr,
2135 int *unescaped_buf_size)
2138 start_code = find_marker(buf_ptr, buf_end);
2140 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
2142 return AVERROR(ENOMEM);
2144 /* unescape buffer of SOS, use special treatment for JPEG-LS */
2145 if (start_code == SOS && !s->ls) {
2146 const uint8_t *src = *buf_ptr;
2147 const uint8_t *ptr = src;
2148 uint8_t *dst = s->buffer;
2150 #define copy_data_segment(skip) do { \
2151 ptrdiff_t length = (ptr - src) - (skip); \
2153 memcpy(dst, src, length); \
2159 if (s->avctx->codec_id == AV_CODEC_ID_THP) {
2161 copy_data_segment(0);
2163 while (ptr < buf_end) {
2164 uint8_t x = *(ptr++);
2168 while (ptr < buf_end && x == 0xff) {
2173 /* 0xFF, 0xFF, ... */
2175 copy_data_segment(skip);
2177 /* decrement src as it is equal to ptr after the
2178 * copy_data_segment macro and we might want to
2179 * copy the current value of x later on */
2183 if (x < RST0 || x > RST7) {
2184 copy_data_segment(1);
2191 copy_data_segment(0);
2193 #undef copy_data_segment
2195 *unescaped_buf_ptr = s->buffer;
2196 *unescaped_buf_size = dst - s->buffer;
2197 memset(s->buffer + *unescaped_buf_size, 0,
2198 AV_INPUT_BUFFER_PADDING_SIZE);
2200 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
2201 (buf_end - *buf_ptr) - (dst - s->buffer));
2202 } else if (start_code == SOS && s->ls) {
2203 const uint8_t *src = *buf_ptr;
2204 uint8_t *dst = s->buffer;
2210 while (src + t < buf_end) {
2211 uint8_t x = src[t++];
2213 while ((src + t < buf_end) && x == 0xff)
2222 init_put_bits(&pb, dst, t);
2224 /* unescape bitstream */
2226 uint8_t x = src[b++];
2227 put_bits(&pb, 8, x);
2228 if (x == 0xFF && b < t) {
2231 av_log(s->avctx, AV_LOG_WARNING, "Invalid escape sequence\n");
2234 put_bits(&pb, 7, x);
2238 flush_put_bits(&pb);
2240 *unescaped_buf_ptr = dst;
2241 *unescaped_buf_size = (bit_count + 7) >> 3;
2242 memset(s->buffer + *unescaped_buf_size, 0,
2243 AV_INPUT_BUFFER_PADDING_SIZE);
2245 *unescaped_buf_ptr = *buf_ptr;
2246 *unescaped_buf_size = buf_end - *buf_ptr;
2252 static void reset_icc_profile(MJpegDecodeContext *s)
2257 for (i = 0; i < s->iccnum; i++)
2258 av_freep(&s->iccdata[i]);
2259 av_freep(&s->iccdata);
2260 av_freep(&s->iccdatalens);
2266 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
2269 AVFrame *frame = data;
2270 const uint8_t *buf = avpkt->data;
2271 int buf_size = avpkt->size;
2272 MJpegDecodeContext *s = avctx->priv_data;
2273 const uint8_t *buf_end, *buf_ptr;
2274 const uint8_t *unescaped_buf_ptr;
2276 int unescaped_buf_size;
2282 s->buf_size = buf_size;
2284 av_dict_free(&s->exif_metadata);
2285 av_freep(&s->stereo3d);
2286 s->adobe_transform = -1;
2289 reset_icc_profile(s);
2292 buf_end = buf + buf_size;
2293 while (buf_ptr < buf_end) {
2294 /* find start next marker */
2295 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
2297 &unescaped_buf_size);
2299 if (start_code < 0) {
2301 } else if (unescaped_buf_size > INT_MAX / 8) {
2302 av_log(avctx, AV_LOG_ERROR,
2303 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
2304 start_code, unescaped_buf_size, buf_size);
2305 return AVERROR_INVALIDDATA;
2307 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
2308 start_code, buf_end - buf_ptr);
2310 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
2313 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
2317 s->start_code = start_code;
2318 if (s->avctx->debug & FF_DEBUG_STARTCODE)
2319 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
2321 /* process markers */
2322 if (start_code >= RST0 && start_code <= RST7) {
2323 av_log(avctx, AV_LOG_DEBUG,
2324 "restart marker: %d\n", start_code & 0x0f);
2326 } else if (start_code >= APP0 && start_code <= APP15) {
2327 if ((ret = mjpeg_decode_app(s)) < 0)
2328 av_log(avctx, AV_LOG_ERROR, "unable to decode APP fields: %s\n",
2331 } else if (start_code == COM) {
2332 ret = mjpeg_decode_com(s);
2335 } else if (start_code == DQT) {
2336 ret = ff_mjpeg_decode_dqt(s);
2343 if (!CONFIG_JPEGLS_DECODER &&
2344 (start_code == SOF48 || start_code == LSE)) {
2345 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
2346 return AVERROR(ENOSYS);
2349 if (avctx->skip_frame == AVDISCARD_ALL) {
2350 switch(start_code) {
2365 switch (start_code) {
2367 s->restart_interval = 0;
2368 s->restart_count = 0;
2369 s->raw_image_buffer = buf_ptr;
2370 s->raw_image_buffer_size = buf_end - buf_ptr;
2371 /* nothing to do on SOI */
2374 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
2375 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
2381 if (start_code == SOF0)
2382 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_BASELINE_DCT;
2384 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_EXTENDED_SEQUENTIAL_DCT;
2388 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2392 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_PROGRESSIVE_DCT;
2396 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2400 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_LOSSLESS;
2401 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2405 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2409 s->avctx->profile = FF_PROFILE_MJPEG_JPEG_LS;
2410 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2414 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2418 if (!CONFIG_JPEGLS_DECODER ||
2419 (ret = ff_jpegls_decode_lse(s)) < 0)
2424 if (!avctx->hwaccel && avctx->skip_frame != AVDISCARD_ALL &&
2425 s->progressive && s->cur_scan && s->got_picture)
2426 mjpeg_idct_scan_progressive_ac(s);
2428 if (!s->got_picture) {
2429 av_log(avctx, AV_LOG_WARNING,
2430 "Found EOI before any SOF, ignoring\n");
2433 if (s->interlaced) {
2434 s->bottom_field ^= 1;
2435 /* if not bottom field, do not output image yet */
2436 if (s->bottom_field == !s->interlace_polarity)
2439 if (avctx->skip_frame == AVDISCARD_ALL) {
2441 goto the_end_no_picture;
2443 if (s->avctx->hwaccel) {
2444 ret = s->avctx->hwaccel->end_frame(s->avctx);
2448 av_freep(&s->hwaccel_picture_private);
2450 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2456 int qp = FFMAX3(s->qscale[0],
2459 int qpw = (s->width + 15) / 16;
2460 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2462 memset(qp_table_buf->data, qp, qpw);
2463 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2466 if(avctx->debug & FF_DEBUG_QP)
2467 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2472 s->raw_scan_buffer = buf_ptr;
2473 s->raw_scan_buffer_size = buf_end - buf_ptr;
2476 if (avctx->skip_frame == AVDISCARD_ALL) {
2477 skip_bits(&s->gb, get_bits_left(&s->gb));
2481 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2482 (avctx->err_recognition & AV_EF_EXPLODE))
2486 if ((ret = mjpeg_decode_dri(s)) < 0)
2499 av_log(avctx, AV_LOG_ERROR,
2500 "mjpeg: unsupported coding type (%x)\n", start_code);
2505 /* eof process start code */
2506 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2507 av_log(avctx, AV_LOG_DEBUG,
2508 "marker parser used %d bytes (%d bits)\n",
2509 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2511 if (s->got_picture && s->cur_scan) {
2512 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2515 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2516 return AVERROR_INVALIDDATA;
2522 is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step > 1;
2524 if (AV_RB32(s->upscale_h)) {
2526 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2527 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2528 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2529 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2530 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2531 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2532 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2533 avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2534 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2535 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2536 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2537 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2539 ret = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2543 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2544 for (p = 0; p<s->nb_components; p++) {
2545 uint8_t *line = s->picture_ptr->data[p];
2548 if (!s->upscale_h[p])
2551 w = AV_CEIL_RSHIFT(w, hshift);
2552 h = AV_CEIL_RSHIFT(h, vshift);
2554 if (s->upscale_v[p] == 1)
2557 for (i = 0; i < h; i++) {
2558 if (s->upscale_h[p] == 1) {
2559 if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2560 else line[w - 1] = line[(w - 1) / 2];
2561 for (index = w - 2; index > 0; index--) {
2563 ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2565 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2567 } else if (s->upscale_h[p] == 2) {
2569 ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 3];
2571 ((uint16_t*)line)[w - 2] = ((uint16_t*)line)[w - 1];
2573 line[w - 1] = line[(w - 1) / 3];
2575 line[w - 2] = line[w - 1];
2577 for (index = w - 3; index > 0; index--) {
2578 line[index] = (line[index / 3] + line[(index + 1) / 3] + line[(index + 2) / 3] + 1) / 3;
2581 line += s->linesize[p];
2585 if (AV_RB32(s->upscale_v)) {
2587 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2588 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2589 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2590 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2591 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2592 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2593 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2594 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2595 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2596 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2597 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2598 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2599 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2601 ret = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2605 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2606 for (p = 0; p < s->nb_components; p++) {
2610 if (!s->upscale_v[p])
2613 w = AV_CEIL_RSHIFT(w, hshift);
2614 h = AV_CEIL_RSHIFT(h, vshift);
2616 dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2617 for (i = h - 1; i; i--) {
2618 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i * s->upscale_v[p] / (s->upscale_v[p] + 1) * s->linesize[p]];
2619 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) * s->upscale_v[p] / (s->upscale_v[p] + 1) * s->linesize[p]];
2620 if (s->upscale_v[p] != 2 && (src1 == src2 || i == h - 1)) {
2621 memcpy(dst, src1, w);
2623 for (index = 0; index < w; index++)
2624 dst[index] = (src1[index] + src2[index]) >> 1;
2626 dst -= s->linesize[p];
2630 if (s->flipped && !s->rgb) {
2632 ret = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2636 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2637 for (index=0; index<s->nb_components; index++) {
2638 uint8_t *dst = s->picture_ptr->data[index];
2639 int w = s->picture_ptr->width;
2640 int h = s->picture_ptr->height;
2641 if(index && index<3){
2642 w = AV_CEIL_RSHIFT(w, hshift);
2643 h = AV_CEIL_RSHIFT(h, vshift);
2646 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2647 for (i=0; i<h/2; i++) {
2649 FFSWAP(int, dst[j], dst2[j]);
2650 dst += s->picture_ptr->linesize[index];
2651 dst2 -= s->picture_ptr->linesize[index];
2656 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2657 int w = s->picture_ptr->width;
2658 int h = s->picture_ptr->height;
2659 av_assert0(s->nb_components == 4);
2660 for (i=0; i<h; i++) {
2663 for (index=0; index<4; index++) {
2664 dst[index] = s->picture_ptr->data[index]
2665 + s->picture_ptr->linesize[index]*i;
2667 for (j=0; j<w; j++) {
2669 int r = dst[0][j] * k;
2670 int g = dst[1][j] * k;
2671 int b = dst[2][j] * k;
2672 dst[0][j] = g*257 >> 16;
2673 dst[1][j] = b*257 >> 16;
2674 dst[2][j] = r*257 >> 16;
2679 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2680 int w = s->picture_ptr->width;
2681 int h = s->picture_ptr->height;
2682 av_assert0(s->nb_components == 4);
2683 for (i=0; i<h; i++) {
2686 for (index=0; index<4; index++) {
2687 dst[index] = s->picture_ptr->data[index]
2688 + s->picture_ptr->linesize[index]*i;
2690 for (j=0; j<w; j++) {
2692 int r = (255 - dst[0][j]) * k;
2693 int g = (128 - dst[1][j]) * k;
2694 int b = (128 - dst[2][j]) * k;
2695 dst[0][j] = r*257 >> 16;
2696 dst[1][j] = (g*257 >> 16) + 128;
2697 dst[2][j] = (b*257 >> 16) + 128;
2704 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2706 stereo->type = s->stereo3d->type;
2707 stereo->flags = s->stereo3d->flags;
2709 av_freep(&s->stereo3d);
2712 if (s->iccnum != 0 && s->iccnum == s->iccread) {
2713 AVFrameSideData *sd;
2718 /* Sum size of all parts. */
2719 for (i = 0; i < s->iccnum; i++)
2720 total_size += s->iccdatalens[i];
2722 sd = av_frame_new_side_data(data, AV_FRAME_DATA_ICC_PROFILE, total_size);
2724 av_log(s->avctx, AV_LOG_ERROR, "Could not allocate frame side data\n");
2725 return AVERROR(ENOMEM);
2728 /* Reassemble the parts, which are now in-order. */
2729 for (i = 0; i < s->iccnum; i++) {
2730 memcpy(sd->data + offset, s->iccdata[i], s->iccdatalens[i]);
2731 offset += s->iccdatalens[i];
2735 av_dict_copy(&((AVFrame *) data)->metadata, s->exif_metadata, 0);
2736 av_dict_free(&s->exif_metadata);
2739 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2741 // return buf_end - buf_ptr;
2742 return buf_ptr - buf;
2745 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2747 MJpegDecodeContext *s = avctx->priv_data;
2750 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2751 av_log(avctx, AV_LOG_INFO, "Single field\n");
2755 av_frame_free(&s->picture);
2756 s->picture_ptr = NULL;
2757 } else if (s->picture_ptr)
2758 av_frame_unref(s->picture_ptr);
2760 av_freep(&s->buffer);
2761 av_freep(&s->stereo3d);
2762 av_freep(&s->ljpeg_buffer);
2763 s->ljpeg_buffer_size = 0;
2765 for (i = 0; i < 3; i++) {
2766 for (j = 0; j < 4; j++)
2767 ff_free_vlc(&s->vlcs[i][j]);
2769 for (i = 0; i < MAX_COMPONENTS; i++) {
2770 av_freep(&s->blocks[i]);
2771 av_freep(&s->last_nnz[i]);
2773 av_dict_free(&s->exif_metadata);
2775 reset_icc_profile(s);
2777 av_freep(&s->hwaccel_picture_private);
2782 static void decode_flush(AVCodecContext *avctx)
2784 MJpegDecodeContext *s = avctx->priv_data;
2788 #if CONFIG_MJPEG_DECODER
2789 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2790 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2791 static const AVOption options[] = {
2792 { "extern_huff", "Use external huffman table.",
2793 OFFSET(extern_huff), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
2797 static const AVClass mjpegdec_class = {
2798 .class_name = "MJPEG decoder",
2799 .item_name = av_default_item_name,
2801 .version = LIBAVUTIL_VERSION_INT,
2804 AVCodec ff_mjpeg_decoder = {
2806 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2807 .type = AVMEDIA_TYPE_VIDEO,
2808 .id = AV_CODEC_ID_MJPEG,
2809 .priv_data_size = sizeof(MJpegDecodeContext),
2810 .init = ff_mjpeg_decode_init,
2811 .close = ff_mjpeg_decode_end,
2812 .decode = ff_mjpeg_decode_frame,
2813 .flush = decode_flush,
2814 .capabilities = AV_CODEC_CAP_DR1,
2816 .priv_class = &mjpegdec_class,
2817 .profiles = NULL_IF_CONFIG_SMALL(ff_mjpeg_profiles),
2818 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
2819 FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2820 .hw_configs = (const AVCodecHWConfigInternal*[]) {
2821 #if CONFIG_MJPEG_NVDEC_HWACCEL
2822 HWACCEL_NVDEC(mjpeg),
2824 #if CONFIG_MJPEG_VAAPI_HWACCEL
2825 HWACCEL_VAAPI(mjpeg),
2831 #if CONFIG_THP_DECODER
2832 AVCodec ff_thp_decoder = {
2834 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2835 .type = AVMEDIA_TYPE_VIDEO,
2836 .id = AV_CODEC_ID_THP,
2837 .priv_data_size = sizeof(MJpegDecodeContext),
2838 .init = ff_mjpeg_decode_init,
2839 .close = ff_mjpeg_decode_end,
2840 .decode = ff_mjpeg_decode_frame,
2841 .flush = decode_flush,
2842 .capabilities = AV_CODEC_CAP_DR1,
2844 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,