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 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
724 return AVERROR_PATCHWELCOME;
727 /* totally blank picture as progressive JPEG will only add details to it */
728 if (s->progressive) {
729 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
730 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
731 for (i = 0; i < s->nb_components; i++) {
732 int size = bw * bh * s->h_count[i] * s->v_count[i];
733 av_freep(&s->blocks[i]);
734 av_freep(&s->last_nnz[i]);
735 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
736 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
737 if (!s->blocks[i] || !s->last_nnz[i])
738 return AVERROR(ENOMEM);
739 s->block_stride[i] = bw * s->h_count[i];
741 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
744 if (s->avctx->hwaccel) {
745 s->hwaccel_picture_private =
746 av_mallocz(s->avctx->hwaccel->frame_priv_data_size);
747 if (!s->hwaccel_picture_private)
748 return AVERROR(ENOMEM);
750 ret = s->avctx->hwaccel->start_frame(s->avctx, s->raw_image_buffer,
751 s->raw_image_buffer_size);
759 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
762 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
763 if (code < 0 || code > 16) {
764 av_log(s->avctx, AV_LOG_WARNING,
765 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
766 0, dc_index, &s->vlcs[0][dc_index]);
771 return get_xbits(&s->gb, code);
776 /* decode block and dequantize */
777 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
778 int dc_index, int ac_index, uint16_t *quant_matrix)
780 int code, i, j, level, val;
783 val = mjpeg_decode_dc(s, dc_index);
784 if (val == 0xfffff) {
785 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
786 return AVERROR_INVALIDDATA;
788 val = val * (unsigned)quant_matrix[0] + s->last_dc[component];
789 val = av_clip_int16(val);
790 s->last_dc[component] = val;
794 {OPEN_READER(re, &s->gb);
796 UPDATE_CACHE(re, &s->gb);
797 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
799 i += ((unsigned)code) >> 4;
802 if (code > MIN_CACHE_BITS - 16)
803 UPDATE_CACHE(re, &s->gb);
806 int cache = GET_CACHE(re, &s->gb);
807 int sign = (~cache) >> 31;
808 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
811 LAST_SKIP_BITS(re, &s->gb, code);
814 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
815 return AVERROR_INVALIDDATA;
817 j = s->scantable.permutated[i];
818 block[j] = level * quant_matrix[i];
821 CLOSE_READER(re, &s->gb);}
826 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
827 int component, int dc_index,
828 uint16_t *quant_matrix, int Al)
831 s->bdsp.clear_block(block);
832 val = mjpeg_decode_dc(s, dc_index);
833 if (val == 0xfffff) {
834 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
835 return AVERROR_INVALIDDATA;
837 val = (val * (quant_matrix[0] << Al)) + s->last_dc[component];
838 s->last_dc[component] = val;
843 /* decode block and dequantize - progressive JPEG version */
844 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
845 uint8_t *last_nnz, int ac_index,
846 uint16_t *quant_matrix,
847 int ss, int se, int Al, int *EOBRUN)
849 int code, i, j, val, run;
858 OPEN_READER(re, &s->gb);
859 for (i = ss; ; i++) {
860 UPDATE_CACHE(re, &s->gb);
861 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
863 run = ((unsigned) code) >> 4;
867 if (code > MIN_CACHE_BITS - 16)
868 UPDATE_CACHE(re, &s->gb);
871 int cache = GET_CACHE(re, &s->gb);
872 int sign = (~cache) >> 31;
873 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
876 LAST_SKIP_BITS(re, &s->gb, code);
880 j = s->scantable.permutated[se];
881 block[j] = level * (quant_matrix[se] << Al);
884 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
885 return AVERROR_INVALIDDATA;
887 j = s->scantable.permutated[i];
888 block[j] = level * (quant_matrix[i] << Al);
890 if (run == 0xF) {// ZRL - skip 15 coefficients
893 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
894 return AVERROR_INVALIDDATA;
899 UPDATE_CACHE(re, &s->gb);
900 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
901 LAST_SKIP_BITS(re, &s->gb, run);
908 CLOSE_READER(re, &s->gb);
917 #define REFINE_BIT(j) { \
918 UPDATE_CACHE(re, &s->gb); \
919 sign = block[j] >> 15; \
920 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
921 ((quant_matrix[i] ^ sign) - sign) << Al; \
922 LAST_SKIP_BITS(re, &s->gb, 1); \
930 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
935 j = s->scantable.permutated[i]; \
938 else if (run-- == 0) \
942 /* decode block and dequantize - progressive JPEG refinement pass */
943 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
945 int ac_index, uint16_t *quant_matrix,
946 int ss, int se, int Al, int *EOBRUN)
948 int code, i = ss, j, sign, val, run;
949 int last = FFMIN(se, *last_nnz);
951 OPEN_READER(re, &s->gb);
956 UPDATE_CACHE(re, &s->gb);
957 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
960 run = ((unsigned) code) >> 4;
961 UPDATE_CACHE(re, &s->gb);
962 val = SHOW_UBITS(re, &s->gb, 1);
963 LAST_SKIP_BITS(re, &s->gb, 1);
965 j = s->scantable.permutated[i];
967 block[j] = ((quant_matrix[i] << Al) ^ val) - val;
971 CLOSE_READER(re, &s->gb);
975 run = ((unsigned) code) >> 4;
982 UPDATE_CACHE(re, &s->gb);
983 run += SHOW_UBITS(re, &s->gb, val);
984 LAST_SKIP_BITS(re, &s->gb, val);
996 for (; i <= last; i++) {
997 j = s->scantable.permutated[i];
1001 CLOSE_READER(re, &s->gb);
1008 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
1013 if (s->restart_interval) {
1015 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
1016 align_get_bits(&s->gb);
1017 for (i = 0; i < nb_components; i++) /* reset dc */
1018 s->last_dc[i] = (4 << s->bits);
1021 i = 8 + ((-get_bits_count(&s->gb)) & 7);
1023 if (s->restart_count == 0) {
1024 if( show_bits(&s->gb, i) == (1 << i) - 1
1025 || show_bits(&s->gb, i) == 0xFF) {
1026 int pos = get_bits_count(&s->gb);
1027 align_get_bits(&s->gb);
1028 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
1029 skip_bits(&s->gb, 8);
1030 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
1031 for (i = 0; i < nb_components; i++) /* reset dc */
1032 s->last_dc[i] = (4 << s->bits);
1035 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
1042 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
1045 uint16_t (*buffer)[4];
1046 int left[4], top[4], topleft[4];
1047 const int linesize = s->linesize[0];
1048 const int mask = ((1 << s->bits) - 1) << point_transform;
1049 int resync_mb_y = 0;
1050 int resync_mb_x = 0;
1052 if (s->nb_components != 3 && s->nb_components != 4)
1053 return AVERROR_INVALIDDATA;
1054 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
1055 return AVERROR_INVALIDDATA;
1058 s->restart_count = s->restart_interval;
1060 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
1061 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
1062 if (!s->ljpeg_buffer)
1063 return AVERROR(ENOMEM);
1065 buffer = s->ljpeg_buffer;
1067 for (i = 0; i < 4; i++)
1068 buffer[0][i] = 1 << (s->bits - 1);
1070 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1071 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
1073 if (s->interlaced && s->bottom_field)
1074 ptr += linesize >> 1;
1076 for (i = 0; i < 4; i++)
1077 top[i] = left[i] = topleft[i] = buffer[0][i];
1079 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1080 int modified_predictor = predictor;
1082 if (get_bits_left(&s->gb) < 1) {
1083 av_log(s->avctx, AV_LOG_ERROR, "bitstream end in rgb_scan\n");
1084 return AVERROR_INVALIDDATA;
1087 if (s->restart_interval && !s->restart_count){
1088 s->restart_count = s->restart_interval;
1092 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
1094 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
1095 modified_predictor = 1;
1097 for (i=0;i<nb_components;i++) {
1100 topleft[i] = top[i];
1101 top[i] = buffer[mb_x][i];
1103 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
1105 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1109 left[i] = buffer[mb_x][i] =
1110 mask & (pred + (unsigned)(dc * (1 << point_transform)));
1113 if (s->restart_interval && !--s->restart_count) {
1114 align_get_bits(&s->gb);
1115 skip_bits(&s->gb, 16); /* skip RSTn */
1118 if (s->rct && s->nb_components == 4) {
1119 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1120 ptr[4*mb_x + 2] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1121 ptr[4*mb_x + 1] = buffer[mb_x][1] + ptr[4*mb_x + 2];
1122 ptr[4*mb_x + 3] = buffer[mb_x][2] + ptr[4*mb_x + 2];
1123 ptr[4*mb_x + 0] = buffer[mb_x][3];
1125 } else if (s->nb_components == 4) {
1126 for(i=0; i<nb_components; i++) {
1127 int c= s->comp_index[i];
1129 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1130 ptr[4*mb_x+3-c] = buffer[mb_x][i];
1132 } else if(s->bits == 9) {
1133 return AVERROR_PATCHWELCOME;
1135 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1136 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
1140 } else if (s->rct) {
1141 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1142 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1143 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1144 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1146 } else if (s->pegasus_rct) {
1147 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1148 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
1149 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1150 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1153 for(i=0; i<nb_components; i++) {
1154 int c= s->comp_index[i];
1156 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1157 ptr[3*mb_x+2-c] = buffer[mb_x][i];
1159 } else if(s->bits == 9) {
1160 return AVERROR_PATCHWELCOME;
1162 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1163 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
1172 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1173 int point_transform, int nb_components)
1175 int i, mb_x, mb_y, mask;
1176 int bits= (s->bits+7)&~7;
1177 int resync_mb_y = 0;
1178 int resync_mb_x = 0;
1180 point_transform += bits - s->bits;
1181 mask = ((1 << s->bits) - 1) << point_transform;
1183 av_assert0(nb_components>=1 && nb_components<=4);
1185 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1186 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1187 if (get_bits_left(&s->gb) < 1) {
1188 av_log(s->avctx, AV_LOG_ERROR, "bitstream end in yuv_scan\n");
1189 return AVERROR_INVALIDDATA;
1191 if (s->restart_interval && !s->restart_count){
1192 s->restart_count = s->restart_interval;
1197 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1198 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1199 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1200 for (i = 0; i < nb_components; i++) {
1203 int n, h, v, x, y, c, j, linesize;
1204 n = s->nb_blocks[i];
1205 c = s->comp_index[i];
1210 linesize= s->linesize[c];
1212 if(bits>8) linesize /= 2;
1214 for(j=0; j<n; j++) {
1217 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1220 if ( h * mb_x + x >= s->width
1221 || v * mb_y + y >= s->height) {
1223 } else if (bits<=8) {
1224 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1226 if(x==0 && leftcol){
1227 pred= 1 << (bits - 1);
1232 if(x==0 && leftcol){
1233 pred= ptr[-linesize];
1235 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1239 if (s->interlaced && s->bottom_field)
1240 ptr += linesize >> 1;
1242 *ptr= pred + ((unsigned)dc << point_transform);
1244 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1246 if(x==0 && leftcol){
1247 pred= 1 << (bits - 1);
1252 if(x==0 && leftcol){
1253 pred= ptr16[-linesize];
1255 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1259 if (s->interlaced && s->bottom_field)
1260 ptr16 += linesize >> 1;
1262 *ptr16= pred + ((unsigned)dc << point_transform);
1271 for (i = 0; i < nb_components; i++) {
1274 int n, h, v, x, y, c, j, linesize, dc;
1275 n = s->nb_blocks[i];
1276 c = s->comp_index[i];
1281 linesize = s->linesize[c];
1283 if(bits>8) linesize /= 2;
1285 for (j = 0; j < n; j++) {
1288 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1291 if ( h * mb_x + x >= s->width
1292 || v * mb_y + y >= s->height) {
1294 } else if (bits<=8) {
1295 ptr = s->picture_ptr->data[c] +
1296 (linesize * (v * mb_y + y)) +
1297 (h * mb_x + x); //FIXME optimize this crap
1298 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1301 *ptr = pred + ((unsigned)dc << point_transform);
1303 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1304 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1307 *ptr16= pred + ((unsigned)dc << point_transform);
1317 if (s->restart_interval && !--s->restart_count) {
1318 align_get_bits(&s->gb);
1319 skip_bits(&s->gb, 16); /* skip RSTn */
1326 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1327 uint8_t *dst, const uint8_t *src,
1328 int linesize, int lowres)
1331 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1333 case 1: copy_block4(dst, src, linesize, linesize, 4);
1335 case 2: copy_block2(dst, src, linesize, linesize, 2);
1337 case 3: *dst = *src;
1342 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1344 int block_x, block_y;
1345 int size = 8 >> s->avctx->lowres;
1347 for (block_y=0; block_y<size; block_y++)
1348 for (block_x=0; block_x<size; block_x++)
1349 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1351 for (block_y=0; block_y<size; block_y++)
1352 for (block_x=0; block_x<size; block_x++)
1353 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1357 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1358 int Al, const uint8_t *mb_bitmask,
1359 int mb_bitmask_size,
1360 const AVFrame *reference)
1362 int i, mb_x, mb_y, chroma_h_shift, chroma_v_shift, chroma_width, chroma_height;
1363 uint8_t *data[MAX_COMPONENTS];
1364 const uint8_t *reference_data[MAX_COMPONENTS];
1365 int linesize[MAX_COMPONENTS];
1366 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1367 int bytes_per_pixel = 1 + (s->bits > 8);
1370 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1371 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1372 return AVERROR_INVALIDDATA;
1374 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1377 s->restart_count = 0;
1379 av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &chroma_h_shift,
1381 chroma_width = AV_CEIL_RSHIFT(s->width, chroma_h_shift);
1382 chroma_height = AV_CEIL_RSHIFT(s->height, chroma_v_shift);
1384 for (i = 0; i < nb_components; i++) {
1385 int c = s->comp_index[i];
1386 data[c] = s->picture_ptr->data[c];
1387 reference_data[c] = reference ? reference->data[c] : NULL;
1388 linesize[c] = s->linesize[c];
1389 s->coefs_finished[c] |= 1;
1392 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1393 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1394 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1396 if (s->restart_interval && !s->restart_count)
1397 s->restart_count = s->restart_interval;
1399 if (get_bits_left(&s->gb) < 0) {
1400 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1401 -get_bits_left(&s->gb));
1402 return AVERROR_INVALIDDATA;
1404 for (i = 0; i < nb_components; i++) {
1406 int n, h, v, x, y, c, j;
1408 n = s->nb_blocks[i];
1409 c = s->comp_index[i];
1414 for (j = 0; j < n; j++) {
1415 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1416 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1418 if (s->interlaced && s->bottom_field)
1419 block_offset += linesize[c] >> 1;
1420 if ( 8*(h * mb_x + x) < ((c == 1) || (c == 2) ? chroma_width : s->width)
1421 && 8*(v * mb_y + y) < ((c == 1) || (c == 2) ? chroma_height : s->height)) {
1422 ptr = data[c] + block_offset;
1425 if (!s->progressive) {
1428 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1429 linesize[c], s->avctx->lowres);
1432 s->bdsp.clear_block(s->block);
1433 if (decode_block(s, s->block, i,
1434 s->dc_index[i], s->ac_index[i],
1435 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1436 av_log(s->avctx, AV_LOG_ERROR,
1437 "error y=%d x=%d\n", mb_y, mb_x);
1438 return AVERROR_INVALIDDATA;
1441 s->idsp.idct_put(ptr, linesize[c], s->block);
1443 shift_output(s, ptr, linesize[c]);
1447 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1449 int16_t *block = s->blocks[c][block_idx];
1451 block[0] += get_bits1(&s->gb) *
1452 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1453 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1454 s->quant_matrixes[s->quant_sindex[i]],
1456 av_log(s->avctx, AV_LOG_ERROR,
1457 "error y=%d x=%d\n", mb_y, mb_x);
1458 return AVERROR_INVALIDDATA;
1461 ff_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1462 ff_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1463 mb_x, mb_y, x, y, c, s->bottom_field,
1464 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1472 handle_rstn(s, nb_components);
1478 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1479 int se, int Ah, int Al)
1483 int c = s->comp_index[0];
1484 uint16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1486 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1487 if (se < ss || se > 63) {
1488 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1489 return AVERROR_INVALIDDATA;
1492 // s->coefs_finished is a bitmask for coefficients coded
1493 // ss and se are parameters telling start and end coefficients
1494 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1496 s->restart_count = 0;
1498 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1499 int block_idx = mb_y * s->block_stride[c];
1500 int16_t (*block)[64] = &s->blocks[c][block_idx];
1501 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1502 if (get_bits_left(&s->gb) <= 0) {
1503 av_log(s->avctx, AV_LOG_ERROR, "bitstream truncated in mjpeg_decode_scan_progressive_ac\n");
1504 return AVERROR_INVALIDDATA;
1506 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1508 if (s->restart_interval && !s->restart_count)
1509 s->restart_count = s->restart_interval;
1512 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1513 quant_matrix, ss, se, Al, &EOBRUN);
1515 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1516 quant_matrix, ss, se, Al, &EOBRUN);
1518 av_log(s->avctx, AV_LOG_ERROR,
1519 "error y=%d x=%d\n", mb_y, mb_x);
1520 return AVERROR_INVALIDDATA;
1523 if (handle_rstn(s, 0))
1530 static void mjpeg_idct_scan_progressive_ac(MJpegDecodeContext *s)
1534 const int bytes_per_pixel = 1 + (s->bits > 8);
1535 const int block_size = s->lossless ? 1 : 8;
1537 for (c = 0; c < s->nb_components; c++) {
1538 uint8_t *data = s->picture_ptr->data[c];
1539 int linesize = s->linesize[c];
1540 int h = s->h_max / s->h_count[c];
1541 int v = s->v_max / s->v_count[c];
1542 int mb_width = (s->width + h * block_size - 1) / (h * block_size);
1543 int mb_height = (s->height + v * block_size - 1) / (v * block_size);
1545 if (~s->coefs_finished[c])
1546 av_log(s->avctx, AV_LOG_WARNING, "component %d is incomplete\n", c);
1548 if (s->interlaced && s->bottom_field)
1549 data += linesize >> 1;
1551 for (mb_y = 0; mb_y < mb_height; mb_y++) {
1552 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1553 int block_idx = mb_y * s->block_stride[c];
1554 int16_t (*block)[64] = &s->blocks[c][block_idx];
1555 for (mb_x = 0; mb_x < mb_width; mb_x++, block++) {
1556 s->idsp.idct_put(ptr, linesize, *block);
1558 shift_output(s, ptr, linesize);
1559 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1565 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1566 int mb_bitmask_size, const AVFrame *reference)
1568 int len, nb_components, i, h, v, predictor, point_transform;
1570 const int block_size = s->lossless ? 1 : 8;
1571 int ilv, prev_shift;
1573 if (!s->got_picture) {
1574 av_log(s->avctx, AV_LOG_WARNING,
1575 "Can not process SOS before SOF, skipping\n");
1580 if (reference->width != s->picture_ptr->width ||
1581 reference->height != s->picture_ptr->height ||
1582 reference->format != s->picture_ptr->format) {
1583 av_log(s->avctx, AV_LOG_ERROR, "Reference mismatching\n");
1584 return AVERROR_INVALIDDATA;
1588 /* XXX: verify len field validity */
1589 len = get_bits(&s->gb, 16);
1590 nb_components = get_bits(&s->gb, 8);
1591 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1592 avpriv_report_missing_feature(s->avctx,
1593 "decode_sos: nb_components (%d)",
1595 return AVERROR_PATCHWELCOME;
1597 if (len != 6 + 2 * nb_components) {
1598 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1599 return AVERROR_INVALIDDATA;
1601 for (i = 0; i < nb_components; i++) {
1602 id = get_bits(&s->gb, 8) - 1;
1603 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1604 /* find component index */
1605 for (index = 0; index < s->nb_components; index++)
1606 if (id == s->component_id[index])
1608 if (index == s->nb_components) {
1609 av_log(s->avctx, AV_LOG_ERROR,
1610 "decode_sos: index(%d) out of components\n", index);
1611 return AVERROR_INVALIDDATA;
1613 /* Metasoft MJPEG codec has Cb and Cr swapped */
1614 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1615 && nb_components == 3 && s->nb_components == 3 && i)
1618 s->quant_sindex[i] = s->quant_index[index];
1619 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1620 s->h_scount[i] = s->h_count[index];
1621 s->v_scount[i] = s->v_count[index];
1623 if((nb_components == 1 || nb_components == 3) && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1624 index = (index+2)%3;
1626 s->comp_index[i] = index;
1628 s->dc_index[i] = get_bits(&s->gb, 4);
1629 s->ac_index[i] = get_bits(&s->gb, 4);
1631 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1632 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1634 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))
1638 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1639 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1640 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1641 prev_shift = get_bits(&s->gb, 4); /* Ah */
1642 point_transform = get_bits(&s->gb, 4); /* Al */
1644 prev_shift = point_transform = 0;
1646 if (nb_components > 1) {
1647 /* interleaved stream */
1648 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1649 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1650 } else if (!s->ls) { /* skip this for JPEG-LS */
1651 h = s->h_max / s->h_scount[0];
1652 v = s->v_max / s->v_scount[0];
1653 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1654 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1655 s->nb_blocks[0] = 1;
1660 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1661 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1662 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1663 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1664 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1667 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1668 for (i = s->mjpb_skiptosod; i > 0; i--)
1669 skip_bits(&s->gb, 8);
1672 for (i = 0; i < nb_components; i++)
1673 s->last_dc[i] = (4 << s->bits);
1675 if (s->avctx->hwaccel) {
1676 int bytes_to_start = get_bits_count(&s->gb) / 8;
1677 av_assert0(bytes_to_start >= 0 &&
1678 s->raw_scan_buffer_size >= bytes_to_start);
1680 ret = s->avctx->hwaccel->decode_slice(s->avctx,
1681 s->raw_scan_buffer + bytes_to_start,
1682 s->raw_scan_buffer_size - bytes_to_start);
1686 } else if (s->lossless) {
1687 av_assert0(s->picture_ptr == s->picture);
1688 if (CONFIG_JPEGLS_DECODER && s->ls) {
1690 // reset_ls_coding_parameters(s, 0);
1692 if ((ret = ff_jpegls_decode_picture(s, predictor,
1693 point_transform, ilv)) < 0)
1697 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1700 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1702 nb_components)) < 0)
1707 if (s->progressive && predictor) {
1708 av_assert0(s->picture_ptr == s->picture);
1709 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1711 point_transform)) < 0)
1714 if ((ret = mjpeg_decode_scan(s, nb_components,
1715 prev_shift, point_transform,
1716 mb_bitmask, mb_bitmask_size, reference)) < 0)
1721 if (s->interlaced &&
1722 get_bits_left(&s->gb) > 32 &&
1723 show_bits(&s->gb, 8) == 0xFF) {
1724 GetBitContext bak = s->gb;
1725 align_get_bits(&bak);
1726 if (show_bits(&bak, 16) == 0xFFD1) {
1727 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1729 skip_bits(&s->gb, 16);
1730 s->bottom_field ^= 1;
1739 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1740 return AVERROR_INVALIDDATA;
1743 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1745 if (get_bits(&s->gb, 16) != 4)
1746 return AVERROR_INVALIDDATA;
1747 s->restart_interval = get_bits(&s->gb, 16);
1748 s->restart_count = 0;
1749 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1750 s->restart_interval);
1755 static int mjpeg_decode_app(MJpegDecodeContext *s)
1759 len = get_bits(&s->gb, 16);
1761 return AVERROR_INVALIDDATA;
1762 if (8 * len > get_bits_left(&s->gb))
1763 return AVERROR_INVALIDDATA;
1765 id = get_bits_long(&s->gb, 32);
1768 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1769 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n",
1770 av_fourcc2str(av_bswap32(id)), id, len);
1772 /* Buggy AVID, it puts EOI only at every 10th frame. */
1773 /* Also, this fourcc is used by non-avid files too, it holds some
1774 information, but it's always present in AVID-created files. */
1775 if (id == AV_RB32("AVI1")) {
1781 4bytes field_size_less_padding
1784 i = get_bits(&s->gb, 8); len--;
1785 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1789 if (id == AV_RB32("JFIF")) {
1790 int t_w, t_h, v1, v2;
1793 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1794 v1 = get_bits(&s->gb, 8);
1795 v2 = get_bits(&s->gb, 8);
1796 skip_bits(&s->gb, 8);
1798 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1799 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1800 if ( s->avctx->sample_aspect_ratio.num <= 0
1801 || s->avctx->sample_aspect_ratio.den <= 0) {
1802 s->avctx->sample_aspect_ratio.num = 0;
1803 s->avctx->sample_aspect_ratio.den = 1;
1806 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1807 av_log(s->avctx, AV_LOG_INFO,
1808 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1810 s->avctx->sample_aspect_ratio.num,
1811 s->avctx->sample_aspect_ratio.den);
1815 t_w = get_bits(&s->gb, 8);
1816 t_h = get_bits(&s->gb, 8);
1818 /* skip thumbnail */
1819 if (len -10 - (t_w * t_h * 3) > 0)
1820 len -= t_w * t_h * 3;
1827 if ( id == AV_RB32("Adob")
1829 && show_bits(&s->gb, 8) == 'e'
1830 && show_bits_long(&s->gb, 32) != AV_RB32("e_CM")) {
1831 skip_bits(&s->gb, 8); /* 'e' */
1832 skip_bits(&s->gb, 16); /* version */
1833 skip_bits(&s->gb, 16); /* flags0 */
1834 skip_bits(&s->gb, 16); /* flags1 */
1835 s->adobe_transform = get_bits(&s->gb, 8);
1836 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1837 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1842 if (id == AV_RB32("LJIF")) {
1844 int pegasus_rct = s->pegasus_rct;
1845 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1846 av_log(s->avctx, AV_LOG_INFO,
1847 "Pegasus lossless jpeg header found\n");
1848 skip_bits(&s->gb, 16); /* version ? */
1849 skip_bits(&s->gb, 16); /* unknown always 0? */
1850 skip_bits(&s->gb, 16); /* unknown always 0? */
1851 skip_bits(&s->gb, 16); /* unknown always 0? */
1852 switch (i=get_bits(&s->gb, 8)) {
1862 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1867 if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
1868 av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
1873 s->pegasus_rct = pegasus_rct;
1877 if (id == AV_RL32("colr") && len > 0) {
1878 s->colr = get_bits(&s->gb, 8);
1879 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1880 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1884 if (id == AV_RL32("xfrm") && len > 0) {
1885 s->xfrm = get_bits(&s->gb, 8);
1886 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1887 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1892 /* JPS extension by VRex */
1893 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1894 int flags, layout, type;
1895 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1896 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1898 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1899 skip_bits(&s->gb, 16); len -= 2; /* block length */
1900 skip_bits(&s->gb, 8); /* reserved */
1901 flags = get_bits(&s->gb, 8);
1902 layout = get_bits(&s->gb, 8);
1903 type = get_bits(&s->gb, 8);
1906 av_freep(&s->stereo3d);
1907 s->stereo3d = av_stereo3d_alloc();
1912 s->stereo3d->type = AV_STEREO3D_2D;
1913 } else if (type == 1) {
1916 s->stereo3d->type = AV_STEREO3D_LINES;
1919 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1922 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1925 if (!(flags & 0x04)) {
1926 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1933 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1934 GetByteContext gbytes;
1935 int ret, le, ifd_offset, bytes_read;
1936 const uint8_t *aligned;
1938 skip_bits(&s->gb, 16); // skip padding
1941 // init byte wise reading
1942 aligned = align_get_bits(&s->gb);
1943 bytestream2_init(&gbytes, aligned, len);
1946 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1948 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1950 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1952 // read 0th IFD and store the metadata
1953 // (return values > 0 indicate the presence of subimage metadata)
1954 ret = ff_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1956 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1960 bytes_read = bytestream2_tell(&gbytes);
1961 skip_bits(&s->gb, bytes_read << 3);
1968 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1969 id = get_bits_long(&s->gb, 32);
1972 if (id == AV_RB32("mjpg")) {
1975 4bytes pad field size
1983 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1984 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1988 if (s->start_code == APP2 && id == AV_RB32("ICC_") && len >= 10) {
1991 unsigned nummarkers;
1993 id = get_bits_long(&s->gb, 32);
1994 id2 = get_bits_long(&s->gb, 24);
1996 if (id != AV_RB32("PROF") || id2 != AV_RB24("ILE")) {
1997 av_log(s->avctx, AV_LOG_WARNING, "Invalid ICC_PROFILE header in APP2\n");
2001 skip_bits(&s->gb, 8);
2002 seqno = get_bits(&s->gb, 8);
2005 av_log(s->avctx, AV_LOG_WARNING, "Invalid sequence number in APP2\n");
2009 nummarkers = get_bits(&s->gb, 8);
2011 if (nummarkers == 0) {
2012 av_log(s->avctx, AV_LOG_WARNING, "Invalid number of markers coded in APP2\n");
2014 } else if (s->iccnum != 0 && nummarkers != s->iccnum) {
2015 av_log(s->avctx, AV_LOG_WARNING, "Mistmatch in coded number of ICC markers between markers\n");
2017 } else if (seqno > nummarkers) {
2018 av_log(s->avctx, AV_LOG_WARNING, "Mismatching sequence number and coded number of ICC markers\n");
2022 /* Allocate if this is the first APP2 we've seen. */
2023 if (s->iccnum == 0) {
2024 s->iccdata = av_mallocz(nummarkers * sizeof(*(s->iccdata)));
2025 s->iccdatalens = av_mallocz(nummarkers * sizeof(*(s->iccdatalens)));
2026 if (!s->iccdata || !s->iccdatalens) {
2027 av_log(s->avctx, AV_LOG_ERROR, "Could not allocate ICC data arrays\n");
2028 return AVERROR(ENOMEM);
2030 s->iccnum = nummarkers;
2033 if (s->iccdata[seqno - 1]) {
2034 av_log(s->avctx, AV_LOG_WARNING, "Duplicate ICC sequence number\n");
2038 s->iccdatalens[seqno - 1] = len;
2039 s->iccdata[seqno - 1] = av_malloc(len);
2040 if (!s->iccdata[seqno - 1]) {
2041 av_log(s->avctx, AV_LOG_ERROR, "Could not allocate ICC data buffer\n");
2042 return AVERROR(ENOMEM);
2045 memcpy(s->iccdata[seqno - 1], align_get_bits(&s->gb), len);
2046 skip_bits(&s->gb, len << 3);
2050 if (s->iccread > s->iccnum)
2051 av_log(s->avctx, AV_LOG_WARNING, "Read more ICC markers than are supposed to be coded\n");
2055 /* slow but needed for extreme adobe jpegs */
2057 av_log(s->avctx, AV_LOG_ERROR,
2058 "mjpeg: error, decode_app parser read over the end\n");
2060 skip_bits(&s->gb, 8);
2065 static int mjpeg_decode_com(MJpegDecodeContext *s)
2067 int len = get_bits(&s->gb, 16);
2068 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
2070 char *cbuf = av_malloc(len - 1);
2072 return AVERROR(ENOMEM);
2074 for (i = 0; i < len - 2; i++)
2075 cbuf[i] = get_bits(&s->gb, 8);
2076 if (i > 0 && cbuf[i - 1] == '\n')
2081 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2082 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
2084 /* buggy avid, it puts EOI only at every 10th frame */
2085 if (!strncmp(cbuf, "AVID", 4)) {
2086 parse_avid(s, cbuf, len);
2087 } else if (!strcmp(cbuf, "CS=ITU601"))
2089 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
2090 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
2092 else if (!strcmp(cbuf, "MULTISCOPE II")) {
2093 s->avctx->sample_aspect_ratio = (AVRational) { 1, 2 };
2103 /* return the 8 bit start code value and update the search
2104 state. Return -1 if no start code found */
2105 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
2107 const uint8_t *buf_ptr;
2112 buf_ptr = *pbuf_ptr;
2113 while (buf_end - buf_ptr > 1) {
2116 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
2125 ff_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
2126 *pbuf_ptr = buf_ptr;
2130 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
2131 const uint8_t **buf_ptr, const uint8_t *buf_end,
2132 const uint8_t **unescaped_buf_ptr,
2133 int *unescaped_buf_size)
2136 start_code = find_marker(buf_ptr, buf_end);
2138 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
2140 return AVERROR(ENOMEM);
2142 /* unescape buffer of SOS, use special treatment for JPEG-LS */
2143 if (start_code == SOS && !s->ls) {
2144 const uint8_t *src = *buf_ptr;
2145 const uint8_t *ptr = src;
2146 uint8_t *dst = s->buffer;
2148 #define copy_data_segment(skip) do { \
2149 ptrdiff_t length = (ptr - src) - (skip); \
2151 memcpy(dst, src, length); \
2157 if (s->avctx->codec_id == AV_CODEC_ID_THP) {
2159 copy_data_segment(0);
2161 while (ptr < buf_end) {
2162 uint8_t x = *(ptr++);
2166 while (ptr < buf_end && x == 0xff) {
2171 /* 0xFF, 0xFF, ... */
2173 copy_data_segment(skip);
2175 /* decrement src as it is equal to ptr after the
2176 * copy_data_segment macro and we might want to
2177 * copy the current value of x later on */
2181 if (x < 0xd0 || x > 0xd7) {
2182 copy_data_segment(1);
2189 copy_data_segment(0);
2191 #undef copy_data_segment
2193 *unescaped_buf_ptr = s->buffer;
2194 *unescaped_buf_size = dst - s->buffer;
2195 memset(s->buffer + *unescaped_buf_size, 0,
2196 AV_INPUT_BUFFER_PADDING_SIZE);
2198 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
2199 (buf_end - *buf_ptr) - (dst - s->buffer));
2200 } else if (start_code == SOS && s->ls) {
2201 const uint8_t *src = *buf_ptr;
2202 uint8_t *dst = s->buffer;
2208 while (src + t < buf_end) {
2209 uint8_t x = src[t++];
2211 while ((src + t < buf_end) && x == 0xff)
2220 init_put_bits(&pb, dst, t);
2222 /* unescape bitstream */
2224 uint8_t x = src[b++];
2225 put_bits(&pb, 8, x);
2226 if (x == 0xFF && b < t) {
2229 av_log(s->avctx, AV_LOG_WARNING, "Invalid escape sequence\n");
2232 put_bits(&pb, 7, x);
2236 flush_put_bits(&pb);
2238 *unescaped_buf_ptr = dst;
2239 *unescaped_buf_size = (bit_count + 7) >> 3;
2240 memset(s->buffer + *unescaped_buf_size, 0,
2241 AV_INPUT_BUFFER_PADDING_SIZE);
2243 *unescaped_buf_ptr = *buf_ptr;
2244 *unescaped_buf_size = buf_end - *buf_ptr;
2250 static void reset_icc_profile(MJpegDecodeContext *s)
2255 for (i = 0; i < s->iccnum; i++)
2256 av_freep(&s->iccdata[i]);
2257 av_freep(&s->iccdata);
2258 av_freep(&s->iccdatalens);
2264 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
2267 AVFrame *frame = data;
2268 const uint8_t *buf = avpkt->data;
2269 int buf_size = avpkt->size;
2270 MJpegDecodeContext *s = avctx->priv_data;
2271 const uint8_t *buf_end, *buf_ptr;
2272 const uint8_t *unescaped_buf_ptr;
2274 int unescaped_buf_size;
2280 s->buf_size = buf_size;
2282 av_dict_free(&s->exif_metadata);
2283 av_freep(&s->stereo3d);
2284 s->adobe_transform = -1;
2287 reset_icc_profile(s);
2290 buf_end = buf + buf_size;
2291 while (buf_ptr < buf_end) {
2292 /* find start next marker */
2293 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
2295 &unescaped_buf_size);
2297 if (start_code < 0) {
2299 } else if (unescaped_buf_size > INT_MAX / 8) {
2300 av_log(avctx, AV_LOG_ERROR,
2301 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
2302 start_code, unescaped_buf_size, buf_size);
2303 return AVERROR_INVALIDDATA;
2305 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
2306 start_code, buf_end - buf_ptr);
2308 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
2311 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
2315 s->start_code = start_code;
2316 if (s->avctx->debug & FF_DEBUG_STARTCODE)
2317 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
2319 /* process markers */
2320 if (start_code >= 0xd0 && start_code <= 0xd7) {
2321 av_log(avctx, AV_LOG_DEBUG,
2322 "restart marker: %d\n", start_code & 0x0f);
2324 } else if (start_code >= APP0 && start_code <= APP15) {
2325 if ((ret = mjpeg_decode_app(s)) < 0)
2326 av_log(avctx, AV_LOG_ERROR, "unable to decode APP fields: %s\n",
2329 } else if (start_code == COM) {
2330 ret = mjpeg_decode_com(s);
2333 } else if (start_code == DQT) {
2334 ret = ff_mjpeg_decode_dqt(s);
2341 if (!CONFIG_JPEGLS_DECODER &&
2342 (start_code == SOF48 || start_code == LSE)) {
2343 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
2344 return AVERROR(ENOSYS);
2347 if (avctx->skip_frame == AVDISCARD_ALL) {
2348 switch(start_code) {
2363 switch (start_code) {
2365 s->restart_interval = 0;
2366 s->restart_count = 0;
2367 s->raw_image_buffer = buf_ptr;
2368 s->raw_image_buffer_size = buf_end - buf_ptr;
2369 /* nothing to do on SOI */
2372 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
2373 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
2379 if (start_code == SOF0)
2380 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_BASELINE_DCT;
2382 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_EXTENDED_SEQUENTIAL_DCT;
2386 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2390 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_PROGRESSIVE_DCT;
2394 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2398 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_LOSSLESS;
2399 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2403 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2407 s->avctx->profile = FF_PROFILE_MJPEG_JPEG_LS;
2408 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2412 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2416 if (!CONFIG_JPEGLS_DECODER ||
2417 (ret = ff_jpegls_decode_lse(s)) < 0)
2422 if (!avctx->hwaccel && avctx->skip_frame != AVDISCARD_ALL &&
2423 s->progressive && s->cur_scan && s->got_picture)
2424 mjpeg_idct_scan_progressive_ac(s);
2426 if (!s->got_picture) {
2427 av_log(avctx, AV_LOG_WARNING,
2428 "Found EOI before any SOF, ignoring\n");
2431 if (s->interlaced) {
2432 s->bottom_field ^= 1;
2433 /* if not bottom field, do not output image yet */
2434 if (s->bottom_field == !s->interlace_polarity)
2437 if (avctx->skip_frame == AVDISCARD_ALL) {
2439 goto the_end_no_picture;
2441 if (s->avctx->hwaccel) {
2442 ret = s->avctx->hwaccel->end_frame(s->avctx);
2446 av_freep(&s->hwaccel_picture_private);
2448 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2454 int qp = FFMAX3(s->qscale[0],
2457 int qpw = (s->width + 15) / 16;
2458 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2460 memset(qp_table_buf->data, qp, qpw);
2461 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2464 if(avctx->debug & FF_DEBUG_QP)
2465 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2470 s->raw_scan_buffer = buf_ptr;
2471 s->raw_scan_buffer_size = buf_end - buf_ptr;
2474 if (avctx->skip_frame == AVDISCARD_ALL) {
2475 skip_bits(&s->gb, get_bits_left(&s->gb));
2479 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2480 (avctx->err_recognition & AV_EF_EXPLODE))
2484 if ((ret = mjpeg_decode_dri(s)) < 0)
2497 av_log(avctx, AV_LOG_ERROR,
2498 "mjpeg: unsupported coding type (%x)\n", start_code);
2503 /* eof process start code */
2504 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2505 av_log(avctx, AV_LOG_DEBUG,
2506 "marker parser used %d bytes (%d bits)\n",
2507 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2509 if (s->got_picture && s->cur_scan) {
2510 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2513 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2514 return AVERROR_INVALIDDATA;
2520 is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step > 1;
2522 if (AV_RB32(s->upscale_h)) {
2524 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2525 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2526 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2527 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2528 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2529 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2530 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2531 avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2532 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2533 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2534 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2535 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2537 ret = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2541 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2542 for (p = 0; p<s->nb_components; p++) {
2543 uint8_t *line = s->picture_ptr->data[p];
2546 if (!s->upscale_h[p])
2549 w = AV_CEIL_RSHIFT(w, hshift);
2550 h = AV_CEIL_RSHIFT(h, vshift);
2552 if (s->upscale_v[p] == 1)
2555 for (i = 0; i < h; i++) {
2556 if (s->upscale_h[p] == 1) {
2557 if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2558 else line[w - 1] = line[(w - 1) / 2];
2559 for (index = w - 2; index > 0; index--) {
2561 ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2563 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2565 } else if (s->upscale_h[p] == 2) {
2567 ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 3];
2569 ((uint16_t*)line)[w - 2] = ((uint16_t*)line)[w - 1];
2571 line[w - 1] = line[(w - 1) / 3];
2573 line[w - 2] = line[w - 1];
2575 for (index = w - 3; index > 0; index--) {
2576 line[index] = (line[index / 3] + line[(index + 1) / 3] + line[(index + 2) / 3] + 1) / 3;
2579 line += s->linesize[p];
2583 if (AV_RB32(s->upscale_v)) {
2585 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2586 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2587 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2588 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2589 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2590 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2591 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2592 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2593 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2594 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2595 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2596 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2597 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2599 ret = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2603 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2604 for (p = 0; p < s->nb_components; p++) {
2608 if (!s->upscale_v[p])
2611 w = AV_CEIL_RSHIFT(w, hshift);
2612 h = AV_CEIL_RSHIFT(h, vshift);
2614 dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2615 for (i = h - 1; i; i--) {
2616 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i * s->upscale_v[p] / (s->upscale_v[p] + 1) * s->linesize[p]];
2617 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) * s->upscale_v[p] / (s->upscale_v[p] + 1) * s->linesize[p]];
2618 if (s->upscale_v[p] != 2 && (src1 == src2 || i == h - 1)) {
2619 memcpy(dst, src1, w);
2621 for (index = 0; index < w; index++)
2622 dst[index] = (src1[index] + src2[index]) >> 1;
2624 dst -= s->linesize[p];
2628 if (s->flipped && !s->rgb) {
2630 ret = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2634 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2635 for (index=0; index<s->nb_components; index++) {
2636 uint8_t *dst = s->picture_ptr->data[index];
2637 int w = s->picture_ptr->width;
2638 int h = s->picture_ptr->height;
2639 if(index && index<3){
2640 w = AV_CEIL_RSHIFT(w, hshift);
2641 h = AV_CEIL_RSHIFT(h, vshift);
2644 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2645 for (i=0; i<h/2; i++) {
2647 FFSWAP(int, dst[j], dst2[j]);
2648 dst += s->picture_ptr->linesize[index];
2649 dst2 -= s->picture_ptr->linesize[index];
2654 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2655 int w = s->picture_ptr->width;
2656 int h = s->picture_ptr->height;
2657 av_assert0(s->nb_components == 4);
2658 for (i=0; i<h; i++) {
2661 for (index=0; index<4; index++) {
2662 dst[index] = s->picture_ptr->data[index]
2663 + s->picture_ptr->linesize[index]*i;
2665 for (j=0; j<w; j++) {
2667 int r = dst[0][j] * k;
2668 int g = dst[1][j] * k;
2669 int b = dst[2][j] * k;
2670 dst[0][j] = g*257 >> 16;
2671 dst[1][j] = b*257 >> 16;
2672 dst[2][j] = r*257 >> 16;
2677 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2678 int w = s->picture_ptr->width;
2679 int h = s->picture_ptr->height;
2680 av_assert0(s->nb_components == 4);
2681 for (i=0; i<h; i++) {
2684 for (index=0; index<4; index++) {
2685 dst[index] = s->picture_ptr->data[index]
2686 + s->picture_ptr->linesize[index]*i;
2688 for (j=0; j<w; j++) {
2690 int r = (255 - dst[0][j]) * k;
2691 int g = (128 - dst[1][j]) * k;
2692 int b = (128 - dst[2][j]) * k;
2693 dst[0][j] = r*257 >> 16;
2694 dst[1][j] = (g*257 >> 16) + 128;
2695 dst[2][j] = (b*257 >> 16) + 128;
2702 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2704 stereo->type = s->stereo3d->type;
2705 stereo->flags = s->stereo3d->flags;
2707 av_freep(&s->stereo3d);
2710 if (s->iccnum != 0 && s->iccnum == s->iccread) {
2711 AVFrameSideData *sd;
2716 /* Sum size of all parts. */
2717 for (i = 0; i < s->iccnum; i++)
2718 total_size += s->iccdatalens[i];
2720 sd = av_frame_new_side_data(data, AV_FRAME_DATA_ICC_PROFILE, total_size);
2722 av_log(s->avctx, AV_LOG_ERROR, "Could not allocate frame side data\n");
2723 return AVERROR(ENOMEM);
2726 /* Reassemble the parts, which are now in-order. */
2727 for (i = 0; i < s->iccnum; i++) {
2728 memcpy(sd->data + offset, s->iccdata[i], s->iccdatalens[i]);
2729 offset += s->iccdatalens[i];
2733 av_dict_copy(&((AVFrame *) data)->metadata, s->exif_metadata, 0);
2734 av_dict_free(&s->exif_metadata);
2737 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2739 // return buf_end - buf_ptr;
2740 return buf_ptr - buf;
2743 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2745 MJpegDecodeContext *s = avctx->priv_data;
2748 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2749 av_log(avctx, AV_LOG_INFO, "Single field\n");
2753 av_frame_free(&s->picture);
2754 s->picture_ptr = NULL;
2755 } else if (s->picture_ptr)
2756 av_frame_unref(s->picture_ptr);
2758 av_freep(&s->buffer);
2759 av_freep(&s->stereo3d);
2760 av_freep(&s->ljpeg_buffer);
2761 s->ljpeg_buffer_size = 0;
2763 for (i = 0; i < 3; i++) {
2764 for (j = 0; j < 4; j++)
2765 ff_free_vlc(&s->vlcs[i][j]);
2767 for (i = 0; i < MAX_COMPONENTS; i++) {
2768 av_freep(&s->blocks[i]);
2769 av_freep(&s->last_nnz[i]);
2771 av_dict_free(&s->exif_metadata);
2773 reset_icc_profile(s);
2775 av_freep(&s->hwaccel_picture_private);
2780 static void decode_flush(AVCodecContext *avctx)
2782 MJpegDecodeContext *s = avctx->priv_data;
2786 #if CONFIG_MJPEG_DECODER
2787 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2788 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2789 static const AVOption options[] = {
2790 { "extern_huff", "Use external huffman table.",
2791 OFFSET(extern_huff), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
2795 static const AVClass mjpegdec_class = {
2796 .class_name = "MJPEG decoder",
2797 .item_name = av_default_item_name,
2799 .version = LIBAVUTIL_VERSION_INT,
2802 AVCodec ff_mjpeg_decoder = {
2804 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2805 .type = AVMEDIA_TYPE_VIDEO,
2806 .id = AV_CODEC_ID_MJPEG,
2807 .priv_data_size = sizeof(MJpegDecodeContext),
2808 .init = ff_mjpeg_decode_init,
2809 .close = ff_mjpeg_decode_end,
2810 .decode = ff_mjpeg_decode_frame,
2811 .flush = decode_flush,
2812 .capabilities = AV_CODEC_CAP_DR1,
2814 .priv_class = &mjpegdec_class,
2815 .profiles = NULL_IF_CONFIG_SMALL(ff_mjpeg_profiles),
2816 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
2817 FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2818 .hw_configs = (const AVCodecHWConfigInternal*[]) {
2819 #if CONFIG_MJPEG_NVDEC_HWACCEL
2820 HWACCEL_NVDEC(mjpeg),
2822 #if CONFIG_MJPEG_VAAPI_HWACCEL
2823 HWACCEL_VAAPI(mjpeg),
2829 #if CONFIG_THP_DECODER
2830 AVCodec ff_thp_decoder = {
2832 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2833 .type = AVMEDIA_TYPE_VIDEO,
2834 .id = AV_CODEC_ID_THP,
2835 .priv_data_size = sizeof(MJpegDecodeContext),
2836 .init = ff_mjpeg_decode_init,
2837 .close = ff_mjpeg_decode_end,
2838 .decode = ff_mjpeg_decode_frame,
2839 .flush = decode_flush,
2840 .capabilities = AV_CODEC_CAP_DR1,
2842 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,