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"
41 #include "jpegtables.h"
44 #include "jpeglsdec.h"
48 #include "bytestream.h"
51 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
52 const uint8_t *val_table, int nb_codes,
53 int use_static, int is_ac)
55 uint8_t huff_size[256] = { 0 };
56 uint16_t huff_code[256];
57 uint16_t huff_sym[256];
60 av_assert0(nb_codes <= 256);
62 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
64 for (i = 0; i < 256; i++)
65 huff_sym[i] = i + 16 * is_ac;
68 huff_sym[0] = 16 * 256;
70 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
71 huff_code, 2, 2, huff_sym, 2, 2, use_static);
74 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
76 build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
77 avpriv_mjpeg_val_dc, 12, 0, 0);
78 build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
79 avpriv_mjpeg_val_dc, 12, 0, 0);
80 build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
81 avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
82 build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
83 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
84 build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
85 avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
86 build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
87 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
90 static void parse_avid(MJpegDecodeContext *s, uint8_t *buf, int len)
93 if (len > 14 && buf[12] == 1) /* 1 - NTSC */
94 s->interlace_polarity = 1;
95 if (len > 14 && buf[12] == 2) /* 2 - PAL */
96 s->interlace_polarity = 0;
97 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
98 av_log(s->avctx, AV_LOG_INFO, "AVID: len:%d %d\n", len, len > 14 ? buf[12] : -1);
101 static void init_idct(AVCodecContext *avctx)
103 MJpegDecodeContext *s = avctx->priv_data;
105 ff_idctdsp_init(&s->idsp, avctx);
106 ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
110 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
112 MJpegDecodeContext *s = avctx->priv_data;
114 if (!s->picture_ptr) {
115 s->picture = av_frame_alloc();
117 return AVERROR(ENOMEM);
118 s->picture_ptr = s->picture;
122 ff_blockdsp_init(&s->bdsp, avctx);
123 ff_hpeldsp_init(&s->hdsp, avctx->flags);
128 s->first_picture = 1;
130 s->org_height = avctx->coded_height;
131 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
132 avctx->colorspace = AVCOL_SPC_BT470BG;
134 build_basic_mjpeg_vlc(s);
136 if (s->extern_huff) {
137 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
138 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
139 if (ff_mjpeg_decode_dht(s)) {
140 av_log(avctx, AV_LOG_ERROR,
141 "error using external huffman table, switching back to internal\n");
142 build_basic_mjpeg_vlc(s);
145 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
146 s->interlace_polarity = 1; /* bottom field first */
147 av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
148 } else if (avctx->field_order == AV_FIELD_UNKNOWN) {
149 if (avctx->codec_tag == AV_RL32("MJPG"))
150 s->interlace_polarity = 1;
153 if ( avctx->extradata_size > 8
154 && AV_RL32(avctx->extradata) == 0x2C
155 && AV_RL32(avctx->extradata+4) == 0x18) {
156 parse_avid(s, avctx->extradata, avctx->extradata_size);
159 if (avctx->codec->id == AV_CODEC_ID_AMV)
166 /* quantize tables */
167 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
171 len = get_bits(&s->gb, 16) - 2;
173 if (8*len > get_bits_left(&s->gb)) {
174 av_log(s->avctx, AV_LOG_ERROR, "dqt: len %d is too large\n", len);
175 return AVERROR_INVALIDDATA;
179 int pr = get_bits(&s->gb, 4);
181 av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
182 return AVERROR_INVALIDDATA;
184 index = get_bits(&s->gb, 4);
187 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
188 /* read quant table */
189 for (i = 0; i < 64; i++) {
190 s->quant_matrixes[index][i] = get_bits(&s->gb, pr ? 16 : 8);
191 if (s->quant_matrixes[index][i] == 0) {
192 av_log(s->avctx, AV_LOG_ERROR, "dqt: 0 quant value\n");
193 return AVERROR_INVALIDDATA;
197 // XXX FIXME fine-tune, and perhaps add dc too
198 s->qscale[index] = FFMAX(s->quant_matrixes[index][1],
199 s->quant_matrixes[index][8]) >> 1;
200 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
201 index, s->qscale[index]);
202 len -= 1 + 64 * (1+pr);
207 /* decode huffman tables and build VLC decoders */
208 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
210 int len, index, i, class, n, v, code_max;
211 uint8_t bits_table[17];
212 uint8_t val_table[256];
215 len = get_bits(&s->gb, 16) - 2;
217 if (8*len > get_bits_left(&s->gb)) {
218 av_log(s->avctx, AV_LOG_ERROR, "dht: len %d is too large\n", len);
219 return AVERROR_INVALIDDATA;
224 return AVERROR_INVALIDDATA;
225 class = get_bits(&s->gb, 4);
227 return AVERROR_INVALIDDATA;
228 index = get_bits(&s->gb, 4);
230 return AVERROR_INVALIDDATA;
232 for (i = 1; i <= 16; i++) {
233 bits_table[i] = get_bits(&s->gb, 8);
237 if (len < n || n > 256)
238 return AVERROR_INVALIDDATA;
241 for (i = 0; i < n; i++) {
242 v = get_bits(&s->gb, 8);
249 /* build VLC and flush previous vlc if present */
250 ff_free_vlc(&s->vlcs[class][index]);
251 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
252 class, index, code_max + 1);
253 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
254 code_max + 1, 0, class > 0)) < 0)
258 ff_free_vlc(&s->vlcs[2][index]);
259 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
260 code_max + 1, 0, 0)) < 0)
267 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
269 int len, nb_components, i, width, height, bits, ret;
271 int h_count[MAX_COMPONENTS] = { 0 };
272 int v_count[MAX_COMPONENTS] = { 0 };
275 memset(s->upscale_h, 0, sizeof(s->upscale_h));
276 memset(s->upscale_v, 0, sizeof(s->upscale_v));
278 /* XXX: verify len field validity */
279 len = get_bits(&s->gb, 16);
280 bits = get_bits(&s->gb, 8);
282 if (bits > 16 || bits < 1) {
283 av_log(s->avctx, AV_LOG_ERROR, "bits %d is invalid\n", bits);
284 return AVERROR_INVALIDDATA;
287 if (s->avctx->bits_per_raw_sample != bits) {
288 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);
289 s->avctx->bits_per_raw_sample = bits;
294 if (bits == 9 && !s->pegasus_rct)
295 s->rct = 1; // FIXME ugly
297 if(s->lossless && s->avctx->lowres){
298 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
302 height = get_bits(&s->gb, 16);
303 width = get_bits(&s->gb, 16);
305 // HACK for odd_height.mov
306 if (s->interlaced && s->width == width && s->height == height + 1)
309 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
310 if (av_image_check_size(width, height, 0, s->avctx))
311 return AVERROR_INVALIDDATA;
313 nb_components = get_bits(&s->gb, 8);
314 if (nb_components <= 0 ||
315 nb_components > MAX_COMPONENTS)
317 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
318 if (nb_components != s->nb_components) {
319 av_log(s->avctx, AV_LOG_ERROR,
320 "nb_components changing in interlaced picture\n");
321 return AVERROR_INVALIDDATA;
324 if (s->ls && !(bits <= 8 || nb_components == 1)) {
325 avpriv_report_missing_feature(s->avctx,
326 "JPEG-LS that is not <= 8 "
327 "bits/component or 16-bit gray");
328 return AVERROR_PATCHWELCOME;
330 s->nb_components = nb_components;
333 for (i = 0; i < nb_components; i++) {
335 s->component_id[i] = get_bits(&s->gb, 8) - 1;
336 h_count[i] = get_bits(&s->gb, 4);
337 v_count[i] = get_bits(&s->gb, 4);
338 /* compute hmax and vmax (only used in interleaved case) */
339 if (h_count[i] > s->h_max)
340 s->h_max = h_count[i];
341 if (v_count[i] > s->v_max)
342 s->v_max = v_count[i];
343 s->quant_index[i] = get_bits(&s->gb, 8);
344 if (s->quant_index[i] >= 4) {
345 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
346 return AVERROR_INVALIDDATA;
348 if (!h_count[i] || !v_count[i]) {
349 av_log(s->avctx, AV_LOG_ERROR,
350 "Invalid sampling factor in component %d %d:%d\n",
351 i, h_count[i], v_count[i]);
352 return AVERROR_INVALIDDATA;
355 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
356 i, h_count[i], v_count[i],
357 s->component_id[i], s->quant_index[i]);
359 if ( nb_components == 4
360 && s->component_id[0] == 'C' - 1
361 && s->component_id[1] == 'M' - 1
362 && s->component_id[2] == 'Y' - 1
363 && s->component_id[3] == 'K' - 1)
364 s->adobe_transform = 0;
366 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
367 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
368 return AVERROR_PATCHWELCOME;
372 /* if different size, realloc/alloc picture */
373 if (width != s->width || height != s->height || bits != s->bits ||
374 memcmp(s->h_count, h_count, sizeof(h_count)) ||
375 memcmp(s->v_count, v_count, sizeof(v_count))) {
380 memcpy(s->h_count, h_count, sizeof(h_count));
381 memcpy(s->v_count, v_count, sizeof(v_count));
385 /* test interlaced mode */
386 if (s->first_picture &&
387 (s->multiscope != 2 || s->avctx->time_base.den >= 25 * s->avctx->time_base.num) &&
388 s->org_height != 0 &&
389 s->height < ((s->org_height * 3) / 4)) {
391 s->bottom_field = s->interlace_polarity;
392 s->picture_ptr->interlaced_frame = 1;
393 s->picture_ptr->top_field_first = !s->interlace_polarity;
397 ret = ff_set_dimensions(s->avctx, width, height);
401 s->first_picture = 0;
404 if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
405 if (s->progressive) {
406 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
407 return AVERROR_INVALIDDATA;
410 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
412 else if (!s->lossless)
414 /* XXX: not complete test ! */
415 pix_fmt_id = ((unsigned)s->h_count[0] << 28) | (s->v_count[0] << 24) |
416 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
417 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
418 (s->h_count[3] << 4) | s->v_count[3];
419 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
420 /* NOTE we do not allocate pictures large enough for the possible
421 * padding of h/v_count being 4 */
422 if (!(pix_fmt_id & 0xD0D0D0D0))
423 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
424 if (!(pix_fmt_id & 0x0D0D0D0D))
425 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
427 for (i = 0; i < 8; i++) {
428 int j = 6 + (i&1) - (i&6);
429 int is = (pix_fmt_id >> (4*i)) & 0xF;
430 int js = (pix_fmt_id >> (4*j)) & 0xF;
432 if (is == 1 && js != 2 && (i < 2 || i > 5))
433 js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
434 if (is == 1 && js != 2 && (i < 2 || i > 5))
435 js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
437 if (is == 1 && js == 2) {
438 if (i & 1) s->upscale_h[j/2] = 1;
439 else s->upscale_v[j/2] = 1;
443 switch (pix_fmt_id) {
446 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
448 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
449 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
451 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
452 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
453 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
456 av_assert0(s->nb_components == 3);
460 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
462 if (s->adobe_transform == 0 && s->bits <= 8) {
463 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
465 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
466 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
469 av_assert0(s->nb_components == 4);
473 if (s->adobe_transform == 0 && s->bits <= 8) {
474 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
475 s->upscale_v[1] = s->upscale_v[2] = 1;
476 s->upscale_h[1] = s->upscale_h[2] = 1;
477 } else if (s->adobe_transform == 2 && s->bits <= 8) {
478 s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
479 s->upscale_v[1] = s->upscale_v[2] = 1;
480 s->upscale_h[1] = s->upscale_h[2] = 1;
481 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
483 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
484 else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
485 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
487 av_assert0(s->nb_components == 4);
493 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
496 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
501 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
504 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
516 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
518 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
525 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
526 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
529 s->upscale_v[0] = s->upscale_v[1] = 1;
531 if (pix_fmt_id == 0x14111100)
532 s->upscale_v[1] = s->upscale_v[2] = 1;
533 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
536 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
540 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
541 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
544 s->upscale_h[0] = s->upscale_h[1] = 1;
546 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
547 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
548 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
554 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
555 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
556 s->upscale_h[1] = s->upscale_h[2] = 2;
560 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
563 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
568 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
569 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
570 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
571 if (pix_fmt_id == 0x42111100) {
574 s->upscale_h[1] = s->upscale_h[2] = 1;
575 } else if (pix_fmt_id == 0x24111100) {
578 s->upscale_v[1] = s->upscale_v[2] = 1;
582 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
585 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
589 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x bits:%d\n", pix_fmt_id, s->bits);
590 memset(s->upscale_h, 0, sizeof(s->upscale_h));
591 memset(s->upscale_v, 0, sizeof(s->upscale_v));
592 return AVERROR_PATCHWELCOME;
594 if ((AV_RB32(s->upscale_h) || AV_RB32(s->upscale_v)) && s->avctx->lowres) {
595 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
596 return AVERROR_PATCHWELCOME;
599 memset(s->upscale_h, 0, sizeof(s->upscale_h));
600 memset(s->upscale_v, 0, sizeof(s->upscale_v));
601 if (s->nb_components == 3) {
602 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
603 } else if (s->nb_components != 1) {
604 av_log(s->avctx, AV_LOG_ERROR, "Unsupported number of components %d\n", s->nb_components);
605 return AVERROR_PATCHWELCOME;
606 } else if (s->palette_index && s->bits <= 8)
607 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
608 else if (s->bits <= 8)
609 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
611 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
614 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
616 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
620 if (s->avctx->skip_frame == AVDISCARD_ALL) {
621 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
622 s->picture_ptr->key_frame = 1;
627 av_frame_unref(s->picture_ptr);
628 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
630 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
631 s->picture_ptr->key_frame = 1;
634 for (i = 0; i < 4; i++)
635 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
637 ff_dlog(s->avctx, "%d %d %d %d %d %d\n",
638 s->width, s->height, s->linesize[0], s->linesize[1],
639 s->interlaced, s->avctx->height);
641 if (len != (8 + (3 * nb_components)))
642 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
645 if ((s->rgb && !s->lossless && !s->ls) ||
646 (!s->rgb && s->ls && s->nb_components > 1)) {
647 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
648 return AVERROR_PATCHWELCOME;
651 /* totally blank picture as progressive JPEG will only add details to it */
652 if (s->progressive) {
653 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
654 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
655 for (i = 0; i < s->nb_components; i++) {
656 int size = bw * bh * s->h_count[i] * s->v_count[i];
657 av_freep(&s->blocks[i]);
658 av_freep(&s->last_nnz[i]);
659 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
660 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
661 if (!s->blocks[i] || !s->last_nnz[i])
662 return AVERROR(ENOMEM);
663 s->block_stride[i] = bw * s->h_count[i];
665 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
670 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
673 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
674 if (code < 0 || code > 16) {
675 av_log(s->avctx, AV_LOG_WARNING,
676 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
677 0, dc_index, &s->vlcs[0][dc_index]);
682 return get_xbits(&s->gb, code);
687 /* decode block and dequantize */
688 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
689 int dc_index, int ac_index, uint16_t *quant_matrix)
691 int code, i, j, level, val;
694 val = mjpeg_decode_dc(s, dc_index);
695 if (val == 0xfffff) {
696 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
697 return AVERROR_INVALIDDATA;
699 val = val * quant_matrix[0] + s->last_dc[component];
700 val = FFMIN(val, 32767);
701 s->last_dc[component] = val;
705 {OPEN_READER(re, &s->gb);
707 UPDATE_CACHE(re, &s->gb);
708 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
710 i += ((unsigned)code) >> 4;
713 if (code > MIN_CACHE_BITS - 16)
714 UPDATE_CACHE(re, &s->gb);
717 int cache = GET_CACHE(re, &s->gb);
718 int sign = (~cache) >> 31;
719 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
722 LAST_SKIP_BITS(re, &s->gb, code);
725 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
726 return AVERROR_INVALIDDATA;
728 j = s->scantable.permutated[i];
729 block[j] = level * quant_matrix[i];
732 CLOSE_READER(re, &s->gb);}
737 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
738 int component, int dc_index,
739 uint16_t *quant_matrix, int Al)
742 s->bdsp.clear_block(block);
743 val = mjpeg_decode_dc(s, dc_index);
744 if (val == 0xfffff) {
745 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
746 return AVERROR_INVALIDDATA;
748 val = (val * (quant_matrix[0] << Al)) + s->last_dc[component];
749 s->last_dc[component] = val;
754 /* decode block and dequantize - progressive JPEG version */
755 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
756 uint8_t *last_nnz, int ac_index,
757 uint16_t *quant_matrix,
758 int ss, int se, int Al, int *EOBRUN)
760 int code, i, j, level, val, run;
768 OPEN_READER(re, &s->gb);
769 for (i = ss; ; i++) {
770 UPDATE_CACHE(re, &s->gb);
771 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
773 run = ((unsigned) code) >> 4;
777 if (code > MIN_CACHE_BITS - 16)
778 UPDATE_CACHE(re, &s->gb);
781 int cache = GET_CACHE(re, &s->gb);
782 int sign = (~cache) >> 31;
783 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
786 LAST_SKIP_BITS(re, &s->gb, code);
790 j = s->scantable.permutated[se];
791 block[j] = level * (quant_matrix[se] << Al);
794 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
795 return AVERROR_INVALIDDATA;
797 j = s->scantable.permutated[i];
798 block[j] = level * (quant_matrix[i] << Al);
800 if (run == 0xF) {// ZRL - skip 15 coefficients
803 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
804 return AVERROR_INVALIDDATA;
809 UPDATE_CACHE(re, &s->gb);
810 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
811 LAST_SKIP_BITS(re, &s->gb, run);
818 CLOSE_READER(re, &s->gb);
827 #define REFINE_BIT(j) { \
828 UPDATE_CACHE(re, &s->gb); \
829 sign = block[j] >> 15; \
830 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
831 ((quant_matrix[i] ^ sign) - sign) << Al; \
832 LAST_SKIP_BITS(re, &s->gb, 1); \
840 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
845 j = s->scantable.permutated[i]; \
848 else if (run-- == 0) \
852 /* decode block and dequantize - progressive JPEG refinement pass */
853 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
855 int ac_index, uint16_t *quant_matrix,
856 int ss, int se, int Al, int *EOBRUN)
858 int code, i = ss, j, sign, val, run;
859 int last = FFMIN(se, *last_nnz);
861 OPEN_READER(re, &s->gb);
866 UPDATE_CACHE(re, &s->gb);
867 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
870 run = ((unsigned) code) >> 4;
871 UPDATE_CACHE(re, &s->gb);
872 val = SHOW_UBITS(re, &s->gb, 1);
873 LAST_SKIP_BITS(re, &s->gb, 1);
875 j = s->scantable.permutated[i];
877 block[j] = ((quant_matrix[i] << Al) ^ val) - val;
881 CLOSE_READER(re, &s->gb);
885 run = ((unsigned) code) >> 4;
892 UPDATE_CACHE(re, &s->gb);
893 run += SHOW_UBITS(re, &s->gb, val);
894 LAST_SKIP_BITS(re, &s->gb, val);
906 for (; i <= last; i++) {
907 j = s->scantable.permutated[i];
911 CLOSE_READER(re, &s->gb);
918 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
923 if (s->restart_interval) {
925 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
926 align_get_bits(&s->gb);
927 for (i = 0; i < nb_components; i++) /* reset dc */
928 s->last_dc[i] = (4 << s->bits);
931 i = 8 + ((-get_bits_count(&s->gb)) & 7);
933 if (s->restart_count == 0) {
934 if( show_bits(&s->gb, i) == (1 << i) - 1
935 || show_bits(&s->gb, i) == 0xFF) {
936 int pos = get_bits_count(&s->gb);
937 align_get_bits(&s->gb);
938 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
939 skip_bits(&s->gb, 8);
940 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
941 for (i = 0; i < nb_components; i++) /* reset dc */
942 s->last_dc[i] = (4 << s->bits);
945 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
952 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
955 uint16_t (*buffer)[4];
956 int left[4], top[4], topleft[4];
957 const int linesize = s->linesize[0];
958 const int mask = ((1 << s->bits) - 1) << point_transform;
962 if (s->nb_components != 3 && s->nb_components != 4)
963 return AVERROR_INVALIDDATA;
964 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
965 return AVERROR_INVALIDDATA;
968 s->restart_count = s->restart_interval;
970 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
971 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
972 buffer = s->ljpeg_buffer;
974 for (i = 0; i < 4; i++)
975 buffer[0][i] = 1 << (s->bits - 1);
977 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
978 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
980 if (s->interlaced && s->bottom_field)
981 ptr += linesize >> 1;
983 for (i = 0; i < 4; i++)
984 top[i] = left[i] = topleft[i] = buffer[0][i];
986 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
987 int modified_predictor = predictor;
989 if (s->restart_interval && !s->restart_count){
990 s->restart_count = s->restart_interval;
994 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
996 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
997 modified_predictor = 1;
999 for (i=0;i<nb_components;i++) {
1002 topleft[i] = top[i];
1003 top[i] = buffer[mb_x][i];
1005 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
1007 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1011 left[i] = buffer[mb_x][i] =
1012 mask & (pred + (dc * (1 << point_transform)));
1015 if (s->restart_interval && !--s->restart_count) {
1016 align_get_bits(&s->gb);
1017 skip_bits(&s->gb, 16); /* skip RSTn */
1020 if (s->rct && s->nb_components == 4) {
1021 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1022 ptr[4*mb_x + 2] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1023 ptr[4*mb_x + 1] = buffer[mb_x][1] + ptr[4*mb_x + 2];
1024 ptr[4*mb_x + 3] = buffer[mb_x][2] + ptr[4*mb_x + 2];
1025 ptr[4*mb_x + 0] = buffer[mb_x][3];
1027 } else if (s->nb_components == 4) {
1028 for(i=0; i<nb_components; i++) {
1029 int c= s->comp_index[i];
1031 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1032 ptr[4*mb_x+3-c] = buffer[mb_x][i];
1034 } else if(s->bits == 9) {
1035 return AVERROR_PATCHWELCOME;
1037 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1038 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
1042 } else if (s->rct) {
1043 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1044 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1045 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1046 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1048 } else if (s->pegasus_rct) {
1049 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1050 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
1051 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1052 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1055 for(i=0; i<nb_components; i++) {
1056 int c= s->comp_index[i];
1058 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1059 ptr[3*mb_x+2-c] = buffer[mb_x][i];
1061 } else if(s->bits == 9) {
1062 return AVERROR_PATCHWELCOME;
1064 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1065 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
1074 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1075 int point_transform, int nb_components)
1077 int i, mb_x, mb_y, mask;
1078 int bits= (s->bits+7)&~7;
1079 int resync_mb_y = 0;
1080 int resync_mb_x = 0;
1082 point_transform += bits - s->bits;
1083 mask = ((1 << s->bits) - 1) << point_transform;
1085 av_assert0(nb_components>=1 && nb_components<=4);
1087 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1088 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1089 if (get_bits_left(&s->gb) < 1) {
1090 av_log(s->avctx, AV_LOG_ERROR, "bitstream end in yuv_scan\n");
1091 return AVERROR_INVALIDDATA;
1093 if (s->restart_interval && !s->restart_count){
1094 s->restart_count = s->restart_interval;
1099 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1100 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1101 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1102 for (i = 0; i < nb_components; i++) {
1105 int n, h, v, x, y, c, j, linesize;
1106 n = s->nb_blocks[i];
1107 c = s->comp_index[i];
1112 linesize= s->linesize[c];
1114 if(bits>8) linesize /= 2;
1116 for(j=0; j<n; j++) {
1119 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1122 if ( h * mb_x + x >= s->width
1123 || v * mb_y + y >= s->height) {
1125 } else if (bits<=8) {
1126 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1128 if(x==0 && leftcol){
1129 pred= 1 << (bits - 1);
1134 if(x==0 && leftcol){
1135 pred= ptr[-linesize];
1137 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1141 if (s->interlaced && s->bottom_field)
1142 ptr += linesize >> 1;
1144 *ptr= pred + ((unsigned)dc << point_transform);
1146 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1148 if(x==0 && leftcol){
1149 pred= 1 << (bits - 1);
1154 if(x==0 && leftcol){
1155 pred= ptr16[-linesize];
1157 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1161 if (s->interlaced && s->bottom_field)
1162 ptr16 += linesize >> 1;
1164 *ptr16= pred + ((unsigned)dc << point_transform);
1173 for (i = 0; i < nb_components; i++) {
1176 int n, h, v, x, y, c, j, linesize, dc;
1177 n = s->nb_blocks[i];
1178 c = s->comp_index[i];
1183 linesize = s->linesize[c];
1185 if(bits>8) linesize /= 2;
1187 for (j = 0; j < n; j++) {
1190 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1193 if ( h * mb_x + x >= s->width
1194 || v * mb_y + y >= s->height) {
1196 } else if (bits<=8) {
1197 ptr = s->picture_ptr->data[c] +
1198 (linesize * (v * mb_y + y)) +
1199 (h * mb_x + x); //FIXME optimize this crap
1200 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1203 *ptr = pred + ((unsigned)dc << point_transform);
1205 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1206 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1209 *ptr16= pred + ((unsigned)dc << point_transform);
1219 if (s->restart_interval && !--s->restart_count) {
1220 align_get_bits(&s->gb);
1221 skip_bits(&s->gb, 16); /* skip RSTn */
1228 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1229 uint8_t *dst, const uint8_t *src,
1230 int linesize, int lowres)
1233 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1235 case 1: copy_block4(dst, src, linesize, linesize, 4);
1237 case 2: copy_block2(dst, src, linesize, linesize, 2);
1239 case 3: *dst = *src;
1244 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1246 int block_x, block_y;
1247 int size = 8 >> s->avctx->lowres;
1249 for (block_y=0; block_y<size; block_y++)
1250 for (block_x=0; block_x<size; block_x++)
1251 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1253 for (block_y=0; block_y<size; block_y++)
1254 for (block_x=0; block_x<size; block_x++)
1255 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1259 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1260 int Al, const uint8_t *mb_bitmask,
1261 int mb_bitmask_size,
1262 const AVFrame *reference)
1264 int i, mb_x, mb_y, chroma_h_shift, chroma_v_shift, chroma_width, chroma_height;
1265 uint8_t *data[MAX_COMPONENTS];
1266 const uint8_t *reference_data[MAX_COMPONENTS];
1267 int linesize[MAX_COMPONENTS];
1268 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1269 int bytes_per_pixel = 1 + (s->bits > 8);
1272 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1273 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1274 return AVERROR_INVALIDDATA;
1276 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1279 s->restart_count = 0;
1281 av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &chroma_h_shift,
1283 chroma_width = AV_CEIL_RSHIFT(s->width, chroma_h_shift);
1284 chroma_height = AV_CEIL_RSHIFT(s->height, chroma_v_shift);
1286 for (i = 0; i < nb_components; i++) {
1287 int c = s->comp_index[i];
1288 data[c] = s->picture_ptr->data[c];
1289 reference_data[c] = reference ? reference->data[c] : NULL;
1290 linesize[c] = s->linesize[c];
1291 s->coefs_finished[c] |= 1;
1294 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1295 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1296 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1298 if (s->restart_interval && !s->restart_count)
1299 s->restart_count = s->restart_interval;
1301 if (get_bits_left(&s->gb) < 0) {
1302 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1303 -get_bits_left(&s->gb));
1304 return AVERROR_INVALIDDATA;
1306 for (i = 0; i < nb_components; i++) {
1308 int n, h, v, x, y, c, j;
1310 n = s->nb_blocks[i];
1311 c = s->comp_index[i];
1316 for (j = 0; j < n; j++) {
1317 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1318 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1320 if (s->interlaced && s->bottom_field)
1321 block_offset += linesize[c] >> 1;
1322 if ( 8*(h * mb_x + x) < ((c == 1) || (c == 2) ? chroma_width : s->width)
1323 && 8*(v * mb_y + y) < ((c == 1) || (c == 2) ? chroma_height : s->height)) {
1324 ptr = data[c] + block_offset;
1327 if (!s->progressive) {
1330 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1331 linesize[c], s->avctx->lowres);
1334 s->bdsp.clear_block(s->block);
1335 if (decode_block(s, s->block, i,
1336 s->dc_index[i], s->ac_index[i],
1337 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1338 av_log(s->avctx, AV_LOG_ERROR,
1339 "error y=%d x=%d\n", mb_y, mb_x);
1340 return AVERROR_INVALIDDATA;
1343 s->idsp.idct_put(ptr, linesize[c], s->block);
1345 shift_output(s, ptr, linesize[c]);
1349 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1351 int16_t *block = s->blocks[c][block_idx];
1353 block[0] += get_bits1(&s->gb) *
1354 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1355 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1356 s->quant_matrixes[s->quant_sindex[i]],
1358 av_log(s->avctx, AV_LOG_ERROR,
1359 "error y=%d x=%d\n", mb_y, mb_x);
1360 return AVERROR_INVALIDDATA;
1363 ff_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1364 ff_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1365 mb_x, mb_y, x, y, c, s->bottom_field,
1366 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1374 handle_rstn(s, nb_components);
1380 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1381 int se, int Ah, int Al)
1385 int c = s->comp_index[0];
1386 uint16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1388 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1389 if (se < ss || se > 63) {
1390 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1391 return AVERROR_INVALIDDATA;
1394 // s->coefs_finished is a bitmask for coefficients coded
1395 // ss and se are parameters telling start and end coefficients
1396 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1398 s->restart_count = 0;
1400 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1401 int block_idx = mb_y * s->block_stride[c];
1402 int16_t (*block)[64] = &s->blocks[c][block_idx];
1403 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1404 if (get_bits_left(&s->gb) <= 0) {
1405 av_log(s->avctx, AV_LOG_ERROR, "bitstream truncated in mjpeg_decode_scan_progressive_ac\n");
1406 return AVERROR_INVALIDDATA;
1408 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1410 if (s->restart_interval && !s->restart_count)
1411 s->restart_count = s->restart_interval;
1414 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1415 quant_matrix, ss, se, Al, &EOBRUN);
1417 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1418 quant_matrix, ss, se, Al, &EOBRUN);
1420 av_log(s->avctx, AV_LOG_ERROR,
1421 "error y=%d x=%d\n", mb_y, mb_x);
1422 return AVERROR_INVALIDDATA;
1425 if (handle_rstn(s, 0))
1432 static void mjpeg_idct_scan_progressive_ac(MJpegDecodeContext *s)
1436 const int bytes_per_pixel = 1 + (s->bits > 8);
1437 const int block_size = s->lossless ? 1 : 8;
1439 for (c = 0; c < s->nb_components; c++) {
1440 uint8_t *data = s->picture_ptr->data[c];
1441 int linesize = s->linesize[c];
1442 int h = s->h_max / s->h_count[c];
1443 int v = s->v_max / s->v_count[c];
1444 int mb_width = (s->width + h * block_size - 1) / (h * block_size);
1445 int mb_height = (s->height + v * block_size - 1) / (v * block_size);
1447 if (~s->coefs_finished[c])
1448 av_log(s->avctx, AV_LOG_WARNING, "component %d is incomplete\n", c);
1450 if (s->interlaced && s->bottom_field)
1451 data += linesize >> 1;
1453 for (mb_y = 0; mb_y < mb_height; mb_y++) {
1454 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1455 int block_idx = mb_y * s->block_stride[c];
1456 int16_t (*block)[64] = &s->blocks[c][block_idx];
1457 for (mb_x = 0; mb_x < mb_width; mb_x++, block++) {
1458 s->idsp.idct_put(ptr, linesize, *block);
1460 shift_output(s, ptr, linesize);
1461 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1467 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1468 int mb_bitmask_size, const AVFrame *reference)
1470 int len, nb_components, i, h, v, predictor, point_transform;
1472 const int block_size = s->lossless ? 1 : 8;
1473 int ilv, prev_shift;
1475 if (!s->got_picture) {
1476 av_log(s->avctx, AV_LOG_WARNING,
1477 "Can not process SOS before SOF, skipping\n");
1481 av_assert0(s->picture_ptr->data[0]);
1482 /* XXX: verify len field validity */
1483 len = get_bits(&s->gb, 16);
1484 nb_components = get_bits(&s->gb, 8);
1485 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1486 av_log(s->avctx, AV_LOG_ERROR,
1487 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1488 return AVERROR_PATCHWELCOME;
1490 if (len != 6 + 2 * nb_components) {
1491 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1492 return AVERROR_INVALIDDATA;
1494 for (i = 0; i < nb_components; i++) {
1495 id = get_bits(&s->gb, 8) - 1;
1496 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1497 /* find component index */
1498 for (index = 0; index < s->nb_components; index++)
1499 if (id == s->component_id[index])
1501 if (index == s->nb_components) {
1502 av_log(s->avctx, AV_LOG_ERROR,
1503 "decode_sos: index(%d) out of components\n", index);
1504 return AVERROR_INVALIDDATA;
1506 /* Metasoft MJPEG codec has Cb and Cr swapped */
1507 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1508 && nb_components == 3 && s->nb_components == 3 && i)
1511 s->quant_sindex[i] = s->quant_index[index];
1512 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1513 s->h_scount[i] = s->h_count[index];
1514 s->v_scount[i] = s->v_count[index];
1516 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1518 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1519 index = (index+2)%3;
1521 s->comp_index[i] = index;
1523 s->dc_index[i] = get_bits(&s->gb, 4);
1524 s->ac_index[i] = get_bits(&s->gb, 4);
1526 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1527 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1529 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))
1533 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1534 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1535 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1536 prev_shift = get_bits(&s->gb, 4); /* Ah */
1537 point_transform = get_bits(&s->gb, 4); /* Al */
1539 prev_shift = point_transform = 0;
1541 if (nb_components > 1) {
1542 /* interleaved stream */
1543 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1544 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1545 } else if (!s->ls) { /* skip this for JPEG-LS */
1546 h = s->h_max / s->h_scount[0];
1547 v = s->v_max / s->v_scount[0];
1548 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1549 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1550 s->nb_blocks[0] = 1;
1555 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1556 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1557 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1558 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1559 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1562 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1563 for (i = s->mjpb_skiptosod; i > 0; i--)
1564 skip_bits(&s->gb, 8);
1567 for (i = 0; i < nb_components; i++)
1568 s->last_dc[i] = (4 << s->bits);
1571 av_assert0(s->picture_ptr == s->picture);
1572 if (CONFIG_JPEGLS_DECODER && s->ls) {
1574 // reset_ls_coding_parameters(s, 0);
1576 if ((ret = ff_jpegls_decode_picture(s, predictor,
1577 point_transform, ilv)) < 0)
1581 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1584 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1586 nb_components)) < 0)
1591 if (s->progressive && predictor) {
1592 av_assert0(s->picture_ptr == s->picture);
1593 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1595 point_transform)) < 0)
1598 if ((ret = mjpeg_decode_scan(s, nb_components,
1599 prev_shift, point_transform,
1600 mb_bitmask, mb_bitmask_size, reference)) < 0)
1605 if (s->interlaced &&
1606 get_bits_left(&s->gb) > 32 &&
1607 show_bits(&s->gb, 8) == 0xFF) {
1608 GetBitContext bak = s->gb;
1609 align_get_bits(&bak);
1610 if (show_bits(&bak, 16) == 0xFFD1) {
1611 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1613 skip_bits(&s->gb, 16);
1614 s->bottom_field ^= 1;
1623 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1624 return AVERROR_INVALIDDATA;
1627 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1629 if (get_bits(&s->gb, 16) != 4)
1630 return AVERROR_INVALIDDATA;
1631 s->restart_interval = get_bits(&s->gb, 16);
1632 s->restart_count = 0;
1633 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1634 s->restart_interval);
1639 static int mjpeg_decode_app(MJpegDecodeContext *s)
1643 len = get_bits(&s->gb, 16);
1645 return AVERROR_INVALIDDATA;
1646 if (8 * len > get_bits_left(&s->gb))
1647 return AVERROR_INVALIDDATA;
1649 id = get_bits_long(&s->gb, 32);
1652 if (s->avctx->debug & FF_DEBUG_STARTCODE) {
1654 av_get_codec_tag_string(id_str, sizeof(id_str), av_bswap32(id));
1655 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n", id_str, id, len);
1658 /* Buggy AVID, it puts EOI only at every 10th frame. */
1659 /* Also, this fourcc is used by non-avid files too, it holds some
1660 information, but it's always present in AVID-created files. */
1661 if (id == AV_RB32("AVI1")) {
1667 4bytes field_size_less_padding
1670 i = get_bits(&s->gb, 8); len--;
1671 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1675 if (id == AV_RB32("JFIF")) {
1676 int t_w, t_h, v1, v2;
1679 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1680 v1 = get_bits(&s->gb, 8);
1681 v2 = get_bits(&s->gb, 8);
1682 skip_bits(&s->gb, 8);
1684 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1685 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1686 if ( s->avctx->sample_aspect_ratio.num <= 0
1687 || s->avctx->sample_aspect_ratio.den <= 0) {
1688 s->avctx->sample_aspect_ratio.num = 0;
1689 s->avctx->sample_aspect_ratio.den = 1;
1692 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1693 av_log(s->avctx, AV_LOG_INFO,
1694 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1696 s->avctx->sample_aspect_ratio.num,
1697 s->avctx->sample_aspect_ratio.den);
1701 t_w = get_bits(&s->gb, 8);
1702 t_h = get_bits(&s->gb, 8);
1704 /* skip thumbnail */
1705 if (len -10 - (t_w * t_h * 3) > 0)
1706 len -= t_w * t_h * 3;
1713 if ( id == AV_RB32("Adob")
1715 && show_bits(&s->gb, 8) == 'e'
1716 && show_bits_long(&s->gb, 32) != AV_RB32("e_CM")) {
1717 skip_bits(&s->gb, 8); /* 'e' */
1718 skip_bits(&s->gb, 16); /* version */
1719 skip_bits(&s->gb, 16); /* flags0 */
1720 skip_bits(&s->gb, 16); /* flags1 */
1721 s->adobe_transform = get_bits(&s->gb, 8);
1722 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1723 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1728 if (id == AV_RB32("LJIF")) {
1730 int pegasus_rct = s->pegasus_rct;
1731 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1732 av_log(s->avctx, AV_LOG_INFO,
1733 "Pegasus lossless jpeg header found\n");
1734 skip_bits(&s->gb, 16); /* version ? */
1735 skip_bits(&s->gb, 16); /* unknown always 0? */
1736 skip_bits(&s->gb, 16); /* unknown always 0? */
1737 skip_bits(&s->gb, 16); /* unknown always 0? */
1738 switch (i=get_bits(&s->gb, 8)) {
1748 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1753 if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
1754 av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
1759 s->pegasus_rct = pegasus_rct;
1763 if (id == AV_RL32("colr") && len > 0) {
1764 s->colr = get_bits(&s->gb, 8);
1765 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1766 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1770 if (id == AV_RL32("xfrm") && len > 0) {
1771 s->xfrm = get_bits(&s->gb, 8);
1772 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1773 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1778 /* JPS extension by VRex */
1779 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1780 int flags, layout, type;
1781 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1782 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1784 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1785 skip_bits(&s->gb, 16); len -= 2; /* block length */
1786 skip_bits(&s->gb, 8); /* reserved */
1787 flags = get_bits(&s->gb, 8);
1788 layout = get_bits(&s->gb, 8);
1789 type = get_bits(&s->gb, 8);
1792 s->stereo3d = av_stereo3d_alloc();
1797 s->stereo3d->type = AV_STEREO3D_2D;
1798 } else if (type == 1) {
1801 s->stereo3d->type = AV_STEREO3D_LINES;
1804 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1807 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1810 if (!(flags & 0x04)) {
1811 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1818 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1819 GetByteContext gbytes;
1820 int ret, le, ifd_offset, bytes_read;
1821 const uint8_t *aligned;
1823 skip_bits(&s->gb, 16); // skip padding
1826 // init byte wise reading
1827 aligned = align_get_bits(&s->gb);
1828 bytestream2_init(&gbytes, aligned, len);
1831 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1833 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1835 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1837 // read 0th IFD and store the metadata
1838 // (return values > 0 indicate the presence of subimage metadata)
1839 ret = avpriv_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1841 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1845 bytes_read = bytestream2_tell(&gbytes);
1846 skip_bits(&s->gb, bytes_read << 3);
1853 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1854 id = get_bits_long(&s->gb, 32);
1857 if (id == AV_RB32("mjpg")) {
1860 4bytes pad field size
1868 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1869 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1874 /* slow but needed for extreme adobe jpegs */
1876 av_log(s->avctx, AV_LOG_ERROR,
1877 "mjpeg: error, decode_app parser read over the end\n");
1879 skip_bits(&s->gb, 8);
1884 static int mjpeg_decode_com(MJpegDecodeContext *s)
1886 int len = get_bits(&s->gb, 16);
1887 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1889 char *cbuf = av_malloc(len - 1);
1891 return AVERROR(ENOMEM);
1893 for (i = 0; i < len - 2; i++)
1894 cbuf[i] = get_bits(&s->gb, 8);
1895 if (i > 0 && cbuf[i - 1] == '\n')
1900 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1901 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1903 /* buggy avid, it puts EOI only at every 10th frame */
1904 if (!strncmp(cbuf, "AVID", 4)) {
1905 parse_avid(s, cbuf, len);
1906 } else if (!strcmp(cbuf, "CS=ITU601"))
1908 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
1909 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1911 else if (!strcmp(cbuf, "MULTISCOPE II")) {
1912 s->avctx->sample_aspect_ratio = (AVRational) { 1, 2 };
1922 /* return the 8 bit start code value and update the search
1923 state. Return -1 if no start code found */
1924 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1926 const uint8_t *buf_ptr;
1931 buf_ptr = *pbuf_ptr;
1932 while (buf_end - buf_ptr > 1) {
1935 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1944 ff_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1945 *pbuf_ptr = buf_ptr;
1949 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1950 const uint8_t **buf_ptr, const uint8_t *buf_end,
1951 const uint8_t **unescaped_buf_ptr,
1952 int *unescaped_buf_size)
1955 start_code = find_marker(buf_ptr, buf_end);
1957 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1959 return AVERROR(ENOMEM);
1961 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1962 if (start_code == SOS && !s->ls) {
1963 const uint8_t *src = *buf_ptr;
1964 const uint8_t *ptr = src;
1965 uint8_t *dst = s->buffer;
1967 #define copy_data_segment(skip) do { \
1968 ptrdiff_t length = (ptr - src) - (skip); \
1970 memcpy(dst, src, length); \
1976 if (s->avctx->codec_id == AV_CODEC_ID_THP) {
1978 copy_data_segment(0);
1980 while (ptr < buf_end) {
1981 uint8_t x = *(ptr++);
1985 while (ptr < buf_end && x == 0xff) {
1990 /* 0xFF, 0xFF, ... */
1992 copy_data_segment(skip);
1994 /* decrement src as it is equal to ptr after the
1995 * copy_data_segment macro and we might want to
1996 * copy the current value of x later on */
2000 if (x < 0xd0 || x > 0xd7) {
2001 copy_data_segment(1);
2008 copy_data_segment(0);
2010 #undef copy_data_segment
2012 *unescaped_buf_ptr = s->buffer;
2013 *unescaped_buf_size = dst - s->buffer;
2014 memset(s->buffer + *unescaped_buf_size, 0,
2015 AV_INPUT_BUFFER_PADDING_SIZE);
2017 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
2018 (buf_end - *buf_ptr) - (dst - s->buffer));
2019 } else if (start_code == SOS && s->ls) {
2020 const uint8_t *src = *buf_ptr;
2021 uint8_t *dst = s->buffer;
2027 while (src + t < buf_end) {
2028 uint8_t x = src[t++];
2030 while ((src + t < buf_end) && x == 0xff)
2039 init_put_bits(&pb, dst, t);
2041 /* unescape bitstream */
2043 uint8_t x = src[b++];
2044 put_bits(&pb, 8, x);
2045 if (x == 0xFF && b < t) {
2048 av_log(s->avctx, AV_LOG_WARNING, "Invalid escape sequence\n");
2051 put_bits(&pb, 7, x);
2055 flush_put_bits(&pb);
2057 *unescaped_buf_ptr = dst;
2058 *unescaped_buf_size = (bit_count + 7) >> 3;
2059 memset(s->buffer + *unescaped_buf_size, 0,
2060 AV_INPUT_BUFFER_PADDING_SIZE);
2062 *unescaped_buf_ptr = *buf_ptr;
2063 *unescaped_buf_size = buf_end - *buf_ptr;
2069 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
2072 AVFrame *frame = data;
2073 const uint8_t *buf = avpkt->data;
2074 int buf_size = avpkt->size;
2075 MJpegDecodeContext *s = avctx->priv_data;
2076 const uint8_t *buf_end, *buf_ptr;
2077 const uint8_t *unescaped_buf_ptr;
2079 int unescaped_buf_size;
2085 av_dict_free(&s->exif_metadata);
2086 av_freep(&s->stereo3d);
2087 s->adobe_transform = -1;
2090 buf_end = buf + buf_size;
2091 while (buf_ptr < buf_end) {
2092 /* find start next marker */
2093 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
2095 &unescaped_buf_size);
2097 if (start_code < 0) {
2099 } else if (unescaped_buf_size > INT_MAX / 8) {
2100 av_log(avctx, AV_LOG_ERROR,
2101 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
2102 start_code, unescaped_buf_size, buf_size);
2103 return AVERROR_INVALIDDATA;
2105 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
2106 start_code, buf_end - buf_ptr);
2108 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
2111 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
2115 s->start_code = start_code;
2116 if (s->avctx->debug & FF_DEBUG_STARTCODE)
2117 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
2119 /* process markers */
2120 if (start_code >= 0xd0 && start_code <= 0xd7)
2121 av_log(avctx, AV_LOG_DEBUG,
2122 "restart marker: %d\n", start_code & 0x0f);
2124 else if (start_code >= APP0 && start_code <= APP15)
2125 mjpeg_decode_app(s);
2127 else if (start_code == COM) {
2128 ret = mjpeg_decode_com(s);
2131 } else if (start_code == DQT) {
2132 ff_mjpeg_decode_dqt(s);
2137 if (!CONFIG_JPEGLS_DECODER &&
2138 (start_code == SOF48 || start_code == LSE)) {
2139 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
2140 return AVERROR(ENOSYS);
2143 if (avctx->skip_frame == AVDISCARD_ALL) {
2144 switch(start_code) {
2159 switch (start_code) {
2161 s->restart_interval = 0;
2162 s->restart_count = 0;
2163 /* nothing to do on SOI */
2166 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
2167 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
2176 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2183 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2187 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2191 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2195 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2199 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2203 if (!CONFIG_JPEGLS_DECODER ||
2204 (ret = ff_jpegls_decode_lse(s)) < 0)
2209 if (avctx->skip_frame != AVDISCARD_ALL && s->progressive && s->cur_scan && s->got_picture)
2210 mjpeg_idct_scan_progressive_ac(s);
2212 if (!s->got_picture) {
2213 av_log(avctx, AV_LOG_WARNING,
2214 "Found EOI before any SOF, ignoring\n");
2217 if (s->interlaced) {
2218 s->bottom_field ^= 1;
2219 /* if not bottom field, do not output image yet */
2220 if (s->bottom_field == !s->interlace_polarity)
2223 if (avctx->skip_frame == AVDISCARD_ALL) {
2225 goto the_end_no_picture;
2227 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2233 int qp = FFMAX3(s->qscale[0],
2236 int qpw = (s->width + 15) / 16;
2237 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2239 memset(qp_table_buf->data, qp, qpw);
2240 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2243 if(avctx->debug & FF_DEBUG_QP)
2244 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2250 if (avctx->skip_frame == AVDISCARD_ALL) {
2251 skip_bits(&s->gb, get_bits_left(&s->gb));
2255 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2256 (avctx->err_recognition & AV_EF_EXPLODE))
2260 mjpeg_decode_dri(s);
2272 av_log(avctx, AV_LOG_ERROR,
2273 "mjpeg: unsupported coding type (%x)\n", start_code);
2278 /* eof process start code */
2279 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2280 av_log(avctx, AV_LOG_DEBUG,
2281 "marker parser used %d bytes (%d bits)\n",
2282 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2284 if (s->got_picture && s->cur_scan) {
2285 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2288 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2289 return AVERROR_INVALIDDATA;
2295 is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step > 1;
2297 if (AV_RB32(s->upscale_h)) {
2299 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2300 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2301 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2302 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2303 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2304 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2305 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2306 avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2307 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2308 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2309 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2310 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2312 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2313 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2314 for (p = 0; p<s->nb_components; p++) {
2315 uint8_t *line = s->picture_ptr->data[p];
2318 if (!s->upscale_h[p])
2321 w = AV_CEIL_RSHIFT(w, hshift);
2322 h = AV_CEIL_RSHIFT(h, vshift);
2324 if (s->upscale_v[p])
2327 for (i = 0; i < h; i++) {
2328 if (s->upscale_h[p] == 1) {
2329 if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2330 else line[w - 1] = line[(w - 1) / 2];
2331 for (index = w - 2; index > 0; index--) {
2333 ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2335 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2337 } else if (s->upscale_h[p] == 2) {
2339 ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 3];
2341 ((uint16_t*)line)[w - 2] = ((uint16_t*)line)[w - 1];
2343 line[w - 1] = line[(w - 1) / 3];
2345 line[w - 2] = line[w - 1];
2347 for (index = w - 3; index > 0; index--) {
2348 line[index] = (line[index / 3] + line[(index + 1) / 3] + line[(index + 2) / 3] + 1) / 3;
2351 line += s->linesize[p];
2355 if (AV_RB32(s->upscale_v)) {
2357 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2358 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2359 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2360 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2361 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2362 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2363 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2364 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2365 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2366 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2367 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2368 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2369 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2371 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2372 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2373 for (p = 0; p < s->nb_components; p++) {
2377 if (!s->upscale_v[p])
2380 w = AV_CEIL_RSHIFT(w, hshift);
2381 h = AV_CEIL_RSHIFT(h, vshift);
2383 dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2384 for (i = h - 1; i; i--) {
2385 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2386 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2387 if (src1 == src2 || i == h - 1) {
2388 memcpy(dst, src1, w);
2390 for (index = 0; index < w; index++)
2391 dst[index] = (src1[index] + src2[index]) >> 1;
2393 dst -= s->linesize[p];
2397 if (s->flipped && !s->rgb) {
2399 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2400 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2401 for (index=0; index<s->nb_components; index++) {
2402 uint8_t *dst = s->picture_ptr->data[index];
2403 int w = s->picture_ptr->width;
2404 int h = s->picture_ptr->height;
2405 if(index && index<3){
2406 w = AV_CEIL_RSHIFT(w, hshift);
2407 h = AV_CEIL_RSHIFT(h, vshift);
2410 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2411 for (i=0; i<h/2; i++) {
2413 FFSWAP(int, dst[j], dst2[j]);
2414 dst += s->picture_ptr->linesize[index];
2415 dst2 -= s->picture_ptr->linesize[index];
2420 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2421 int w = s->picture_ptr->width;
2422 int h = s->picture_ptr->height;
2423 av_assert0(s->nb_components == 4);
2424 for (i=0; i<h; i++) {
2427 for (index=0; index<4; index++) {
2428 dst[index] = s->picture_ptr->data[index]
2429 + s->picture_ptr->linesize[index]*i;
2431 for (j=0; j<w; j++) {
2433 int r = dst[0][j] * k;
2434 int g = dst[1][j] * k;
2435 int b = dst[2][j] * k;
2436 dst[0][j] = g*257 >> 16;
2437 dst[1][j] = b*257 >> 16;
2438 dst[2][j] = r*257 >> 16;
2443 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2444 int w = s->picture_ptr->width;
2445 int h = s->picture_ptr->height;
2446 av_assert0(s->nb_components == 4);
2447 for (i=0; i<h; i++) {
2450 for (index=0; index<4; index++) {
2451 dst[index] = s->picture_ptr->data[index]
2452 + s->picture_ptr->linesize[index]*i;
2454 for (j=0; j<w; j++) {
2456 int r = (255 - dst[0][j]) * k;
2457 int g = (128 - dst[1][j]) * k;
2458 int b = (128 - dst[2][j]) * k;
2459 dst[0][j] = r*257 >> 16;
2460 dst[1][j] = (g*257 >> 16) + 128;
2461 dst[2][j] = (b*257 >> 16) + 128;
2468 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2470 stereo->type = s->stereo3d->type;
2471 stereo->flags = s->stereo3d->flags;
2473 av_freep(&s->stereo3d);
2476 av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
2477 av_dict_free(&s->exif_metadata);
2480 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2482 // return buf_end - buf_ptr;
2483 return buf_ptr - buf;
2486 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2488 MJpegDecodeContext *s = avctx->priv_data;
2491 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2492 av_log(avctx, AV_LOG_INFO, "Single field\n");
2496 av_frame_free(&s->picture);
2497 s->picture_ptr = NULL;
2498 } else if (s->picture_ptr)
2499 av_frame_unref(s->picture_ptr);
2501 av_freep(&s->buffer);
2502 av_freep(&s->stereo3d);
2503 av_freep(&s->ljpeg_buffer);
2504 s->ljpeg_buffer_size = 0;
2506 for (i = 0; i < 3; i++) {
2507 for (j = 0; j < 4; j++)
2508 ff_free_vlc(&s->vlcs[i][j]);
2510 for (i = 0; i < MAX_COMPONENTS; i++) {
2511 av_freep(&s->blocks[i]);
2512 av_freep(&s->last_nnz[i]);
2514 av_dict_free(&s->exif_metadata);
2518 static void decode_flush(AVCodecContext *avctx)
2520 MJpegDecodeContext *s = avctx->priv_data;
2524 #if CONFIG_MJPEG_DECODER
2525 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2526 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2527 static const AVOption options[] = {
2528 { "extern_huff", "Use external huffman table.",
2529 OFFSET(extern_huff), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
2533 static const AVClass mjpegdec_class = {
2534 .class_name = "MJPEG decoder",
2535 .item_name = av_default_item_name,
2537 .version = LIBAVUTIL_VERSION_INT,
2540 AVCodec ff_mjpeg_decoder = {
2542 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2543 .type = AVMEDIA_TYPE_VIDEO,
2544 .id = AV_CODEC_ID_MJPEG,
2545 .priv_data_size = sizeof(MJpegDecodeContext),
2546 .init = ff_mjpeg_decode_init,
2547 .close = ff_mjpeg_decode_end,
2548 .decode = ff_mjpeg_decode_frame,
2549 .flush = decode_flush,
2550 .capabilities = AV_CODEC_CAP_DR1,
2552 .priv_class = &mjpegdec_class,
2553 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
2554 FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2557 #if CONFIG_THP_DECODER
2558 AVCodec ff_thp_decoder = {
2560 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2561 .type = AVMEDIA_TYPE_VIDEO,
2562 .id = AV_CODEC_ID_THP,
2563 .priv_data_size = sizeof(MJpegDecodeContext),
2564 .init = ff_mjpeg_decode_init,
2565 .close = ff_mjpeg_decode_end,
2566 .decode = ff_mjpeg_decode_frame,
2567 .flush = decode_flush,
2568 .capabilities = AV_CODEC_CAP_DR1,
2570 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,