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 int build_basic_mjpeg_vlc(MJpegDecodeContext *s)
78 if ((ret = build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
79 avpriv_mjpeg_val_dc, 12, 0, 0)) < 0)
82 if ((ret = build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
83 avpriv_mjpeg_val_dc, 12, 0, 0)) < 0)
86 if ((ret = build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
87 avpriv_mjpeg_val_ac_luminance, 251, 0, 1)) < 0)
90 if ((ret = build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
91 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1)) < 0)
94 if ((ret = build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
95 avpriv_mjpeg_val_ac_luminance, 251, 0, 0)) < 0)
98 if ((ret = build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
99 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0)) < 0)
106 static void parse_avid(MJpegDecodeContext *s, uint8_t *buf, int len)
109 if (len > 14 && buf[12] == 1) /* 1 - NTSC */
110 s->interlace_polarity = 1;
111 if (len > 14 && buf[12] == 2) /* 2 - PAL */
112 s->interlace_polarity = 0;
113 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
114 av_log(s->avctx, AV_LOG_INFO, "AVID: len:%d %d\n", len, len > 14 ? buf[12] : -1);
117 static void init_idct(AVCodecContext *avctx)
119 MJpegDecodeContext *s = avctx->priv_data;
121 ff_idctdsp_init(&s->idsp, avctx);
122 ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
126 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
128 MJpegDecodeContext *s = avctx->priv_data;
131 if (!s->picture_ptr) {
132 s->picture = av_frame_alloc();
134 return AVERROR(ENOMEM);
135 s->picture_ptr = s->picture;
139 ff_blockdsp_init(&s->bdsp, avctx);
140 ff_hpeldsp_init(&s->hdsp, avctx->flags);
145 s->first_picture = 1;
147 s->org_height = avctx->coded_height;
148 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
149 avctx->colorspace = AVCOL_SPC_BT470BG;
151 if ((ret = build_basic_mjpeg_vlc(s)) < 0)
154 if (s->extern_huff) {
155 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
156 if ((ret = init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8)) < 0)
158 if (ff_mjpeg_decode_dht(s)) {
159 av_log(avctx, AV_LOG_ERROR,
160 "error using external huffman table, switching back to internal\n");
161 build_basic_mjpeg_vlc(s);
164 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
165 s->interlace_polarity = 1; /* bottom field first */
166 av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
167 } else if (avctx->field_order == AV_FIELD_UNKNOWN) {
168 if (avctx->codec_tag == AV_RL32("MJPG"))
169 s->interlace_polarity = 1;
172 if ( avctx->extradata_size > 8
173 && AV_RL32(avctx->extradata) == 0x2C
174 && AV_RL32(avctx->extradata+4) == 0x18) {
175 parse_avid(s, avctx->extradata, avctx->extradata_size);
178 if (avctx->codec->id == AV_CODEC_ID_AMV)
185 /* quantize tables */
186 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
190 len = get_bits(&s->gb, 16) - 2;
192 if (8*len > get_bits_left(&s->gb)) {
193 av_log(s->avctx, AV_LOG_ERROR, "dqt: len %d is too large\n", len);
194 return AVERROR_INVALIDDATA;
198 int pr = get_bits(&s->gb, 4);
200 av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
201 return AVERROR_INVALIDDATA;
203 index = get_bits(&s->gb, 4);
206 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
207 /* read quant table */
208 for (i = 0; i < 64; i++) {
209 s->quant_matrixes[index][i] = get_bits(&s->gb, pr ? 16 : 8);
210 if (s->quant_matrixes[index][i] == 0) {
211 av_log(s->avctx, AV_LOG_ERROR, "dqt: 0 quant value\n");
212 return AVERROR_INVALIDDATA;
216 // XXX FIXME fine-tune, and perhaps add dc too
217 s->qscale[index] = FFMAX(s->quant_matrixes[index][1],
218 s->quant_matrixes[index][8]) >> 1;
219 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
220 index, s->qscale[index]);
221 len -= 1 + 64 * (1+pr);
226 /* decode huffman tables and build VLC decoders */
227 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
229 int len, index, i, class, n, v, code_max;
230 uint8_t bits_table[17];
231 uint8_t val_table[256];
234 len = get_bits(&s->gb, 16) - 2;
236 if (8*len > get_bits_left(&s->gb)) {
237 av_log(s->avctx, AV_LOG_ERROR, "dht: len %d is too large\n", len);
238 return AVERROR_INVALIDDATA;
243 return AVERROR_INVALIDDATA;
244 class = get_bits(&s->gb, 4);
246 return AVERROR_INVALIDDATA;
247 index = get_bits(&s->gb, 4);
249 return AVERROR_INVALIDDATA;
251 for (i = 1; i <= 16; i++) {
252 bits_table[i] = get_bits(&s->gb, 8);
256 if (len < n || n > 256)
257 return AVERROR_INVALIDDATA;
260 for (i = 0; i < n; i++) {
261 v = get_bits(&s->gb, 8);
268 /* build VLC and flush previous vlc if present */
269 ff_free_vlc(&s->vlcs[class][index]);
270 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
271 class, index, code_max + 1);
272 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
273 code_max + 1, 0, class > 0)) < 0)
277 ff_free_vlc(&s->vlcs[2][index]);
278 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
279 code_max + 1, 0, 0)) < 0)
286 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
288 int len, nb_components, i, width, height, bits, ret;
290 int h_count[MAX_COMPONENTS] = { 0 };
291 int v_count[MAX_COMPONENTS] = { 0 };
294 memset(s->upscale_h, 0, sizeof(s->upscale_h));
295 memset(s->upscale_v, 0, sizeof(s->upscale_v));
297 /* XXX: verify len field validity */
298 len = get_bits(&s->gb, 16);
299 bits = get_bits(&s->gb, 8);
301 if (bits > 16 || bits < 1) {
302 av_log(s->avctx, AV_LOG_ERROR, "bits %d is invalid\n", bits);
303 return AVERROR_INVALIDDATA;
306 if (s->avctx->bits_per_raw_sample != bits) {
307 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);
308 s->avctx->bits_per_raw_sample = bits;
313 if (bits == 9 && !s->pegasus_rct)
314 s->rct = 1; // FIXME ugly
316 if(s->lossless && s->avctx->lowres){
317 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
321 height = get_bits(&s->gb, 16);
322 width = get_bits(&s->gb, 16);
324 // HACK for odd_height.mov
325 if (s->interlaced && s->width == width && s->height == height + 1)
328 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
329 if (av_image_check_size(width, height, 0, s->avctx) < 0)
330 return AVERROR_INVALIDDATA;
332 nb_components = get_bits(&s->gb, 8);
333 if (nb_components <= 0 ||
334 nb_components > MAX_COMPONENTS)
336 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
337 if (nb_components != s->nb_components) {
338 av_log(s->avctx, AV_LOG_ERROR,
339 "nb_components changing in interlaced picture\n");
340 return AVERROR_INVALIDDATA;
343 if (s->ls && !(bits <= 8 || nb_components == 1)) {
344 avpriv_report_missing_feature(s->avctx,
345 "JPEG-LS that is not <= 8 "
346 "bits/component or 16-bit gray");
347 return AVERROR_PATCHWELCOME;
349 s->nb_components = nb_components;
352 for (i = 0; i < nb_components; i++) {
354 s->component_id[i] = get_bits(&s->gb, 8) - 1;
355 h_count[i] = get_bits(&s->gb, 4);
356 v_count[i] = get_bits(&s->gb, 4);
357 /* compute hmax and vmax (only used in interleaved case) */
358 if (h_count[i] > s->h_max)
359 s->h_max = h_count[i];
360 if (v_count[i] > s->v_max)
361 s->v_max = v_count[i];
362 s->quant_index[i] = get_bits(&s->gb, 8);
363 if (s->quant_index[i] >= 4) {
364 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
365 return AVERROR_INVALIDDATA;
367 if (!h_count[i] || !v_count[i]) {
368 av_log(s->avctx, AV_LOG_ERROR,
369 "Invalid sampling factor in component %d %d:%d\n",
370 i, h_count[i], v_count[i]);
371 return AVERROR_INVALIDDATA;
374 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
375 i, h_count[i], v_count[i],
376 s->component_id[i], s->quant_index[i]);
378 if ( nb_components == 4
379 && s->component_id[0] == 'C' - 1
380 && s->component_id[1] == 'M' - 1
381 && s->component_id[2] == 'Y' - 1
382 && s->component_id[3] == 'K' - 1)
383 s->adobe_transform = 0;
385 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
386 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
387 return AVERROR_PATCHWELCOME;
391 /* if different size, realloc/alloc picture */
392 if (width != s->width || height != s->height || bits != s->bits ||
393 memcmp(s->h_count, h_count, sizeof(h_count)) ||
394 memcmp(s->v_count, v_count, sizeof(v_count))) {
399 memcpy(s->h_count, h_count, sizeof(h_count));
400 memcpy(s->v_count, v_count, sizeof(v_count));
404 /* test interlaced mode */
405 if (s->first_picture &&
406 (s->multiscope != 2 || s->avctx->time_base.den >= 25 * s->avctx->time_base.num) &&
407 s->org_height != 0 &&
408 s->height < ((s->org_height * 3) / 4)) {
410 s->bottom_field = s->interlace_polarity;
411 s->picture_ptr->interlaced_frame = 1;
412 s->picture_ptr->top_field_first = !s->interlace_polarity;
416 ret = ff_set_dimensions(s->avctx, width, height);
420 s->first_picture = 0;
423 if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
424 if (s->progressive) {
425 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
426 return AVERROR_INVALIDDATA;
429 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
431 else if (!s->lossless)
433 /* XXX: not complete test ! */
434 pix_fmt_id = ((unsigned)s->h_count[0] << 28) | (s->v_count[0] << 24) |
435 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
436 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
437 (s->h_count[3] << 4) | s->v_count[3];
438 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
439 /* NOTE we do not allocate pictures large enough for the possible
440 * padding of h/v_count being 4 */
441 if (!(pix_fmt_id & 0xD0D0D0D0))
442 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
443 if (!(pix_fmt_id & 0x0D0D0D0D))
444 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
446 for (i = 0; i < 8; i++) {
447 int j = 6 + (i&1) - (i&6);
448 int is = (pix_fmt_id >> (4*i)) & 0xF;
449 int js = (pix_fmt_id >> (4*j)) & 0xF;
451 if (is == 1 && js != 2 && (i < 2 || i > 5))
452 js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
453 if (is == 1 && js != 2 && (i < 2 || i > 5))
454 js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
456 if (is == 1 && js == 2) {
457 if (i & 1) s->upscale_h[j/2] = 1;
458 else s->upscale_v[j/2] = 1;
462 switch (pix_fmt_id) {
465 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
467 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
468 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
470 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
471 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
472 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
475 av_assert0(s->nb_components == 3);
479 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
481 if (s->adobe_transform == 0 && s->bits <= 8) {
482 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
484 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
485 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
488 av_assert0(s->nb_components == 4);
492 if (s->adobe_transform == 0 && s->bits <= 8) {
493 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
494 s->upscale_v[1] = s->upscale_v[2] = 1;
495 s->upscale_h[1] = s->upscale_h[2] = 1;
496 } else if (s->adobe_transform == 2 && s->bits <= 8) {
497 s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
498 s->upscale_v[1] = s->upscale_v[2] = 1;
499 s->upscale_h[1] = s->upscale_h[2] = 1;
500 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
502 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
503 else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
504 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
506 av_assert0(s->nb_components == 4);
512 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
515 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
520 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
523 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
535 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
537 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
544 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
545 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
548 s->upscale_v[0] = s->upscale_v[1] = 1;
550 if (pix_fmt_id == 0x14111100)
551 s->upscale_v[1] = s->upscale_v[2] = 1;
552 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
555 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
559 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
560 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
563 s->upscale_h[0] = s->upscale_h[1] = 1;
565 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
566 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
567 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
573 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
574 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
575 s->upscale_h[1] = s->upscale_h[2] = 2;
579 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
582 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
587 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
588 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
589 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
590 if (pix_fmt_id == 0x42111100) {
593 s->upscale_h[1] = s->upscale_h[2] = 1;
594 } else if (pix_fmt_id == 0x24111100) {
597 s->upscale_v[1] = s->upscale_v[2] = 1;
601 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
604 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
608 avpriv_report_missing_feature(s->avctx, "Pixel format 0x%x bits:%d", pix_fmt_id, s->bits);
609 memset(s->upscale_h, 0, sizeof(s->upscale_h));
610 memset(s->upscale_v, 0, sizeof(s->upscale_v));
611 return AVERROR_PATCHWELCOME;
613 if ((AV_RB32(s->upscale_h) || AV_RB32(s->upscale_v)) && s->avctx->lowres) {
614 avpriv_report_missing_feature(s->avctx, "Lowres for weird subsampling");
615 return AVERROR_PATCHWELCOME;
618 memset(s->upscale_h, 0, sizeof(s->upscale_h));
619 memset(s->upscale_v, 0, sizeof(s->upscale_v));
620 if (s->nb_components == 3) {
621 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
622 } else if (s->nb_components != 1) {
623 av_log(s->avctx, AV_LOG_ERROR, "Unsupported number of components %d\n", s->nb_components);
624 return AVERROR_PATCHWELCOME;
625 } else if (s->palette_index && s->bits <= 8)
626 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
627 else if (s->bits <= 8)
628 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
630 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
633 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
635 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
639 if (s->avctx->skip_frame == AVDISCARD_ALL) {
640 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
641 s->picture_ptr->key_frame = 1;
646 av_frame_unref(s->picture_ptr);
647 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
649 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
650 s->picture_ptr->key_frame = 1;
653 for (i = 0; i < 4; i++)
654 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
656 ff_dlog(s->avctx, "%d %d %d %d %d %d\n",
657 s->width, s->height, s->linesize[0], s->linesize[1],
658 s->interlaced, s->avctx->height);
660 if (len != (8 + (3 * nb_components)))
661 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
664 if ((s->rgb && !s->lossless && !s->ls) ||
665 (!s->rgb && s->ls && s->nb_components > 1)) {
666 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
667 return AVERROR_PATCHWELCOME;
670 /* totally blank picture as progressive JPEG will only add details to it */
671 if (s->progressive) {
672 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
673 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
674 for (i = 0; i < s->nb_components; i++) {
675 int size = bw * bh * s->h_count[i] * s->v_count[i];
676 av_freep(&s->blocks[i]);
677 av_freep(&s->last_nnz[i]);
678 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
679 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
680 if (!s->blocks[i] || !s->last_nnz[i])
681 return AVERROR(ENOMEM);
682 s->block_stride[i] = bw * s->h_count[i];
684 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
689 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
692 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
693 if (code < 0 || code > 16) {
694 av_log(s->avctx, AV_LOG_WARNING,
695 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
696 0, dc_index, &s->vlcs[0][dc_index]);
701 return get_xbits(&s->gb, code);
706 /* decode block and dequantize */
707 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
708 int dc_index, int ac_index, uint16_t *quant_matrix)
710 int code, i, j, level, val;
713 val = mjpeg_decode_dc(s, dc_index);
714 if (val == 0xfffff) {
715 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
716 return AVERROR_INVALIDDATA;
718 val = val * quant_matrix[0] + s->last_dc[component];
719 val = av_clip_int16(val);
720 s->last_dc[component] = val;
724 {OPEN_READER(re, &s->gb);
726 UPDATE_CACHE(re, &s->gb);
727 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
729 i += ((unsigned)code) >> 4;
732 if (code > MIN_CACHE_BITS - 16)
733 UPDATE_CACHE(re, &s->gb);
736 int cache = GET_CACHE(re, &s->gb);
737 int sign = (~cache) >> 31;
738 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
741 LAST_SKIP_BITS(re, &s->gb, code);
744 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
745 return AVERROR_INVALIDDATA;
747 j = s->scantable.permutated[i];
748 block[j] = level * quant_matrix[i];
751 CLOSE_READER(re, &s->gb);}
756 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
757 int component, int dc_index,
758 uint16_t *quant_matrix, int Al)
761 s->bdsp.clear_block(block);
762 val = mjpeg_decode_dc(s, dc_index);
763 if (val == 0xfffff) {
764 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
765 return AVERROR_INVALIDDATA;
767 val = (val * (quant_matrix[0] << Al)) + s->last_dc[component];
768 s->last_dc[component] = val;
773 /* decode block and dequantize - progressive JPEG version */
774 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
775 uint8_t *last_nnz, int ac_index,
776 uint16_t *quant_matrix,
777 int ss, int se, int Al, int *EOBRUN)
779 int code, i, j, val, run;
788 OPEN_READER(re, &s->gb);
789 for (i = ss; ; i++) {
790 UPDATE_CACHE(re, &s->gb);
791 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
793 run = ((unsigned) code) >> 4;
797 if (code > MIN_CACHE_BITS - 16)
798 UPDATE_CACHE(re, &s->gb);
801 int cache = GET_CACHE(re, &s->gb);
802 int sign = (~cache) >> 31;
803 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
806 LAST_SKIP_BITS(re, &s->gb, code);
810 j = s->scantable.permutated[se];
811 block[j] = level * (quant_matrix[se] << Al);
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] << Al);
820 if (run == 0xF) {// ZRL - skip 15 coefficients
823 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
824 return AVERROR_INVALIDDATA;
829 UPDATE_CACHE(re, &s->gb);
830 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
831 LAST_SKIP_BITS(re, &s->gb, run);
838 CLOSE_READER(re, &s->gb);
847 #define REFINE_BIT(j) { \
848 UPDATE_CACHE(re, &s->gb); \
849 sign = block[j] >> 15; \
850 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
851 ((quant_matrix[i] ^ sign) - sign) << Al; \
852 LAST_SKIP_BITS(re, &s->gb, 1); \
860 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
865 j = s->scantable.permutated[i]; \
868 else if (run-- == 0) \
872 /* decode block and dequantize - progressive JPEG refinement pass */
873 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
875 int ac_index, uint16_t *quant_matrix,
876 int ss, int se, int Al, int *EOBRUN)
878 int code, i = ss, j, sign, val, run;
879 int last = FFMIN(se, *last_nnz);
881 OPEN_READER(re, &s->gb);
886 UPDATE_CACHE(re, &s->gb);
887 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
890 run = ((unsigned) code) >> 4;
891 UPDATE_CACHE(re, &s->gb);
892 val = SHOW_UBITS(re, &s->gb, 1);
893 LAST_SKIP_BITS(re, &s->gb, 1);
895 j = s->scantable.permutated[i];
897 block[j] = ((quant_matrix[i] << Al) ^ val) - val;
901 CLOSE_READER(re, &s->gb);
905 run = ((unsigned) code) >> 4;
912 UPDATE_CACHE(re, &s->gb);
913 run += SHOW_UBITS(re, &s->gb, val);
914 LAST_SKIP_BITS(re, &s->gb, val);
926 for (; i <= last; i++) {
927 j = s->scantable.permutated[i];
931 CLOSE_READER(re, &s->gb);
938 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
943 if (s->restart_interval) {
945 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
946 align_get_bits(&s->gb);
947 for (i = 0; i < nb_components; i++) /* reset dc */
948 s->last_dc[i] = (4 << s->bits);
951 i = 8 + ((-get_bits_count(&s->gb)) & 7);
953 if (s->restart_count == 0) {
954 if( show_bits(&s->gb, i) == (1 << i) - 1
955 || show_bits(&s->gb, i) == 0xFF) {
956 int pos = get_bits_count(&s->gb);
957 align_get_bits(&s->gb);
958 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
959 skip_bits(&s->gb, 8);
960 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
961 for (i = 0; i < nb_components; i++) /* reset dc */
962 s->last_dc[i] = (4 << s->bits);
965 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
972 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
975 uint16_t (*buffer)[4];
976 int left[4], top[4], topleft[4];
977 const int linesize = s->linesize[0];
978 const int mask = ((1 << s->bits) - 1) << point_transform;
982 if (s->nb_components != 3 && s->nb_components != 4)
983 return AVERROR_INVALIDDATA;
984 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
985 return AVERROR_INVALIDDATA;
988 s->restart_count = s->restart_interval;
990 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
991 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
992 if (!s->ljpeg_buffer)
993 return AVERROR(ENOMEM);
995 buffer = s->ljpeg_buffer;
997 for (i = 0; i < 4; i++)
998 buffer[0][i] = 1 << (s->bits - 1);
1000 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1001 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
1003 if (s->interlaced && s->bottom_field)
1004 ptr += linesize >> 1;
1006 for (i = 0; i < 4; i++)
1007 top[i] = left[i] = topleft[i] = buffer[0][i];
1009 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1010 int modified_predictor = predictor;
1012 if (s->restart_interval && !s->restart_count){
1013 s->restart_count = s->restart_interval;
1017 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
1019 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
1020 modified_predictor = 1;
1022 for (i=0;i<nb_components;i++) {
1025 topleft[i] = top[i];
1026 top[i] = buffer[mb_x][i];
1028 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
1030 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1034 left[i] = buffer[mb_x][i] =
1035 mask & (pred + (dc * (1 << point_transform)));
1038 if (s->restart_interval && !--s->restart_count) {
1039 align_get_bits(&s->gb);
1040 skip_bits(&s->gb, 16); /* skip RSTn */
1043 if (s->rct && s->nb_components == 4) {
1044 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1045 ptr[4*mb_x + 2] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1046 ptr[4*mb_x + 1] = buffer[mb_x][1] + ptr[4*mb_x + 2];
1047 ptr[4*mb_x + 3] = buffer[mb_x][2] + ptr[4*mb_x + 2];
1048 ptr[4*mb_x + 0] = buffer[mb_x][3];
1050 } else if (s->nb_components == 4) {
1051 for(i=0; i<nb_components; i++) {
1052 int c= s->comp_index[i];
1054 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1055 ptr[4*mb_x+3-c] = buffer[mb_x][i];
1057 } else if(s->bits == 9) {
1058 return AVERROR_PATCHWELCOME;
1060 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1061 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
1065 } else if (s->rct) {
1066 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1067 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1068 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1069 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1071 } else if (s->pegasus_rct) {
1072 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1073 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
1074 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1075 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1078 for(i=0; i<nb_components; i++) {
1079 int c= s->comp_index[i];
1081 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1082 ptr[3*mb_x+2-c] = buffer[mb_x][i];
1084 } else if(s->bits == 9) {
1085 return AVERROR_PATCHWELCOME;
1087 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1088 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
1097 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1098 int point_transform, int nb_components)
1100 int i, mb_x, mb_y, mask;
1101 int bits= (s->bits+7)&~7;
1102 int resync_mb_y = 0;
1103 int resync_mb_x = 0;
1105 point_transform += bits - s->bits;
1106 mask = ((1 << s->bits) - 1) << point_transform;
1108 av_assert0(nb_components>=1 && nb_components<=4);
1110 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1111 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1112 if (get_bits_left(&s->gb) < 1) {
1113 av_log(s->avctx, AV_LOG_ERROR, "bitstream end in yuv_scan\n");
1114 return AVERROR_INVALIDDATA;
1116 if (s->restart_interval && !s->restart_count){
1117 s->restart_count = s->restart_interval;
1122 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1123 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1124 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1125 for (i = 0; i < nb_components; i++) {
1128 int n, h, v, x, y, c, j, linesize;
1129 n = s->nb_blocks[i];
1130 c = s->comp_index[i];
1135 linesize= s->linesize[c];
1137 if(bits>8) linesize /= 2;
1139 for(j=0; j<n; j++) {
1142 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1145 if ( h * mb_x + x >= s->width
1146 || v * mb_y + y >= s->height) {
1148 } else if (bits<=8) {
1149 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1151 if(x==0 && leftcol){
1152 pred= 1 << (bits - 1);
1157 if(x==0 && leftcol){
1158 pred= ptr[-linesize];
1160 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1164 if (s->interlaced && s->bottom_field)
1165 ptr += linesize >> 1;
1167 *ptr= pred + ((unsigned)dc << point_transform);
1169 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1171 if(x==0 && leftcol){
1172 pred= 1 << (bits - 1);
1177 if(x==0 && leftcol){
1178 pred= ptr16[-linesize];
1180 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1184 if (s->interlaced && s->bottom_field)
1185 ptr16 += linesize >> 1;
1187 *ptr16= pred + ((unsigned)dc << point_transform);
1196 for (i = 0; i < nb_components; i++) {
1199 int n, h, v, x, y, c, j, linesize, dc;
1200 n = s->nb_blocks[i];
1201 c = s->comp_index[i];
1206 linesize = s->linesize[c];
1208 if(bits>8) linesize /= 2;
1210 for (j = 0; j < n; j++) {
1213 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1216 if ( h * mb_x + x >= s->width
1217 || v * mb_y + y >= s->height) {
1219 } else if (bits<=8) {
1220 ptr = s->picture_ptr->data[c] +
1221 (linesize * (v * mb_y + y)) +
1222 (h * mb_x + x); //FIXME optimize this crap
1223 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1226 *ptr = pred + ((unsigned)dc << point_transform);
1228 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1229 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1232 *ptr16= pred + ((unsigned)dc << point_transform);
1242 if (s->restart_interval && !--s->restart_count) {
1243 align_get_bits(&s->gb);
1244 skip_bits(&s->gb, 16); /* skip RSTn */
1251 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1252 uint8_t *dst, const uint8_t *src,
1253 int linesize, int lowres)
1256 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1258 case 1: copy_block4(dst, src, linesize, linesize, 4);
1260 case 2: copy_block2(dst, src, linesize, linesize, 2);
1262 case 3: *dst = *src;
1267 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1269 int block_x, block_y;
1270 int size = 8 >> s->avctx->lowres;
1272 for (block_y=0; block_y<size; block_y++)
1273 for (block_x=0; block_x<size; block_x++)
1274 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1276 for (block_y=0; block_y<size; block_y++)
1277 for (block_x=0; block_x<size; block_x++)
1278 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1282 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1283 int Al, const uint8_t *mb_bitmask,
1284 int mb_bitmask_size,
1285 const AVFrame *reference)
1287 int i, mb_x, mb_y, chroma_h_shift, chroma_v_shift, chroma_width, chroma_height;
1288 uint8_t *data[MAX_COMPONENTS];
1289 const uint8_t *reference_data[MAX_COMPONENTS];
1290 int linesize[MAX_COMPONENTS];
1291 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1292 int bytes_per_pixel = 1 + (s->bits > 8);
1295 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1296 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1297 return AVERROR_INVALIDDATA;
1299 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1302 s->restart_count = 0;
1304 av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &chroma_h_shift,
1306 chroma_width = AV_CEIL_RSHIFT(s->width, chroma_h_shift);
1307 chroma_height = AV_CEIL_RSHIFT(s->height, chroma_v_shift);
1309 for (i = 0; i < nb_components; i++) {
1310 int c = s->comp_index[i];
1311 data[c] = s->picture_ptr->data[c];
1312 reference_data[c] = reference ? reference->data[c] : NULL;
1313 linesize[c] = s->linesize[c];
1314 s->coefs_finished[c] |= 1;
1317 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1318 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1319 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1321 if (s->restart_interval && !s->restart_count)
1322 s->restart_count = s->restart_interval;
1324 if (get_bits_left(&s->gb) < 0) {
1325 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1326 -get_bits_left(&s->gb));
1327 return AVERROR_INVALIDDATA;
1329 for (i = 0; i < nb_components; i++) {
1331 int n, h, v, x, y, c, j;
1333 n = s->nb_blocks[i];
1334 c = s->comp_index[i];
1339 for (j = 0; j < n; j++) {
1340 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1341 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1343 if (s->interlaced && s->bottom_field)
1344 block_offset += linesize[c] >> 1;
1345 if ( 8*(h * mb_x + x) < ((c == 1) || (c == 2) ? chroma_width : s->width)
1346 && 8*(v * mb_y + y) < ((c == 1) || (c == 2) ? chroma_height : s->height)) {
1347 ptr = data[c] + block_offset;
1350 if (!s->progressive) {
1353 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1354 linesize[c], s->avctx->lowres);
1357 s->bdsp.clear_block(s->block);
1358 if (decode_block(s, s->block, i,
1359 s->dc_index[i], s->ac_index[i],
1360 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1361 av_log(s->avctx, AV_LOG_ERROR,
1362 "error y=%d x=%d\n", mb_y, mb_x);
1363 return AVERROR_INVALIDDATA;
1366 s->idsp.idct_put(ptr, linesize[c], s->block);
1368 shift_output(s, ptr, linesize[c]);
1372 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1374 int16_t *block = s->blocks[c][block_idx];
1376 block[0] += get_bits1(&s->gb) *
1377 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1378 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1379 s->quant_matrixes[s->quant_sindex[i]],
1381 av_log(s->avctx, AV_LOG_ERROR,
1382 "error y=%d x=%d\n", mb_y, mb_x);
1383 return AVERROR_INVALIDDATA;
1386 ff_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1387 ff_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1388 mb_x, mb_y, x, y, c, s->bottom_field,
1389 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1397 handle_rstn(s, nb_components);
1403 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1404 int se, int Ah, int Al)
1408 int c = s->comp_index[0];
1409 uint16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1411 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1412 if (se < ss || se > 63) {
1413 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1414 return AVERROR_INVALIDDATA;
1417 // s->coefs_finished is a bitmask for coefficients coded
1418 // ss and se are parameters telling start and end coefficients
1419 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1421 s->restart_count = 0;
1423 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1424 int block_idx = mb_y * s->block_stride[c];
1425 int16_t (*block)[64] = &s->blocks[c][block_idx];
1426 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1427 if (get_bits_left(&s->gb) <= 0) {
1428 av_log(s->avctx, AV_LOG_ERROR, "bitstream truncated in mjpeg_decode_scan_progressive_ac\n");
1429 return AVERROR_INVALIDDATA;
1431 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1433 if (s->restart_interval && !s->restart_count)
1434 s->restart_count = s->restart_interval;
1437 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1438 quant_matrix, ss, se, Al, &EOBRUN);
1440 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1441 quant_matrix, ss, se, Al, &EOBRUN);
1443 av_log(s->avctx, AV_LOG_ERROR,
1444 "error y=%d x=%d\n", mb_y, mb_x);
1445 return AVERROR_INVALIDDATA;
1448 if (handle_rstn(s, 0))
1455 static void mjpeg_idct_scan_progressive_ac(MJpegDecodeContext *s)
1459 const int bytes_per_pixel = 1 + (s->bits > 8);
1460 const int block_size = s->lossless ? 1 : 8;
1462 for (c = 0; c < s->nb_components; c++) {
1463 uint8_t *data = s->picture_ptr->data[c];
1464 int linesize = s->linesize[c];
1465 int h = s->h_max / s->h_count[c];
1466 int v = s->v_max / s->v_count[c];
1467 int mb_width = (s->width + h * block_size - 1) / (h * block_size);
1468 int mb_height = (s->height + v * block_size - 1) / (v * block_size);
1470 if (~s->coefs_finished[c])
1471 av_log(s->avctx, AV_LOG_WARNING, "component %d is incomplete\n", c);
1473 if (s->interlaced && s->bottom_field)
1474 data += linesize >> 1;
1476 for (mb_y = 0; mb_y < mb_height; mb_y++) {
1477 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1478 int block_idx = mb_y * s->block_stride[c];
1479 int16_t (*block)[64] = &s->blocks[c][block_idx];
1480 for (mb_x = 0; mb_x < mb_width; mb_x++, block++) {
1481 s->idsp.idct_put(ptr, linesize, *block);
1483 shift_output(s, ptr, linesize);
1484 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1490 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1491 int mb_bitmask_size, const AVFrame *reference)
1493 int len, nb_components, i, h, v, predictor, point_transform;
1495 const int block_size = s->lossless ? 1 : 8;
1496 int ilv, prev_shift;
1498 if (!s->got_picture) {
1499 av_log(s->avctx, AV_LOG_WARNING,
1500 "Can not process SOS before SOF, skipping\n");
1505 if (reference->width != s->picture_ptr->width ||
1506 reference->height != s->picture_ptr->height ||
1507 reference->format != s->picture_ptr->format) {
1508 av_log(s->avctx, AV_LOG_ERROR, "Reference mismatching\n");
1509 return AVERROR_INVALIDDATA;
1513 av_assert0(s->picture_ptr->data[0]);
1514 /* XXX: verify len field validity */
1515 len = get_bits(&s->gb, 16);
1516 nb_components = get_bits(&s->gb, 8);
1517 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1518 avpriv_report_missing_feature(s->avctx,
1519 "decode_sos: nb_components (%d)",
1521 return AVERROR_PATCHWELCOME;
1523 if (len != 6 + 2 * nb_components) {
1524 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1525 return AVERROR_INVALIDDATA;
1527 for (i = 0; i < nb_components; i++) {
1528 id = get_bits(&s->gb, 8) - 1;
1529 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1530 /* find component index */
1531 for (index = 0; index < s->nb_components; index++)
1532 if (id == s->component_id[index])
1534 if (index == s->nb_components) {
1535 av_log(s->avctx, AV_LOG_ERROR,
1536 "decode_sos: index(%d) out of components\n", index);
1537 return AVERROR_INVALIDDATA;
1539 /* Metasoft MJPEG codec has Cb and Cr swapped */
1540 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1541 && nb_components == 3 && s->nb_components == 3 && i)
1544 s->quant_sindex[i] = s->quant_index[index];
1545 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1546 s->h_scount[i] = s->h_count[index];
1547 s->v_scount[i] = s->v_count[index];
1549 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1551 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1552 index = (index+2)%3;
1554 s->comp_index[i] = index;
1556 s->dc_index[i] = get_bits(&s->gb, 4);
1557 s->ac_index[i] = get_bits(&s->gb, 4);
1559 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1560 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1562 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))
1566 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1567 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1568 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1569 prev_shift = get_bits(&s->gb, 4); /* Ah */
1570 point_transform = get_bits(&s->gb, 4); /* Al */
1572 prev_shift = point_transform = 0;
1574 if (nb_components > 1) {
1575 /* interleaved stream */
1576 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1577 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1578 } else if (!s->ls) { /* skip this for JPEG-LS */
1579 h = s->h_max / s->h_scount[0];
1580 v = s->v_max / s->v_scount[0];
1581 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1582 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1583 s->nb_blocks[0] = 1;
1588 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1589 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1590 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1591 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1592 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1595 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1596 for (i = s->mjpb_skiptosod; i > 0; i--)
1597 skip_bits(&s->gb, 8);
1600 for (i = 0; i < nb_components; i++)
1601 s->last_dc[i] = (4 << s->bits);
1604 av_assert0(s->picture_ptr == s->picture);
1605 if (CONFIG_JPEGLS_DECODER && s->ls) {
1607 // reset_ls_coding_parameters(s, 0);
1609 if ((ret = ff_jpegls_decode_picture(s, predictor,
1610 point_transform, ilv)) < 0)
1614 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1617 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1619 nb_components)) < 0)
1624 if (s->progressive && predictor) {
1625 av_assert0(s->picture_ptr == s->picture);
1626 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1628 point_transform)) < 0)
1631 if ((ret = mjpeg_decode_scan(s, nb_components,
1632 prev_shift, point_transform,
1633 mb_bitmask, mb_bitmask_size, reference)) < 0)
1638 if (s->interlaced &&
1639 get_bits_left(&s->gb) > 32 &&
1640 show_bits(&s->gb, 8) == 0xFF) {
1641 GetBitContext bak = s->gb;
1642 align_get_bits(&bak);
1643 if (show_bits(&bak, 16) == 0xFFD1) {
1644 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1646 skip_bits(&s->gb, 16);
1647 s->bottom_field ^= 1;
1656 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1657 return AVERROR_INVALIDDATA;
1660 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1662 if (get_bits(&s->gb, 16) != 4)
1663 return AVERROR_INVALIDDATA;
1664 s->restart_interval = get_bits(&s->gb, 16);
1665 s->restart_count = 0;
1666 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1667 s->restart_interval);
1672 static int mjpeg_decode_app(MJpegDecodeContext *s)
1676 len = get_bits(&s->gb, 16);
1678 return AVERROR_INVALIDDATA;
1679 if (8 * len > get_bits_left(&s->gb))
1680 return AVERROR_INVALIDDATA;
1682 id = get_bits_long(&s->gb, 32);
1685 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1686 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n",
1687 av_fourcc2str(av_bswap32(id)), id, len);
1689 /* Buggy AVID, it puts EOI only at every 10th frame. */
1690 /* Also, this fourcc is used by non-avid files too, it holds some
1691 information, but it's always present in AVID-created files. */
1692 if (id == AV_RB32("AVI1")) {
1698 4bytes field_size_less_padding
1701 i = get_bits(&s->gb, 8); len--;
1702 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1706 if (id == AV_RB32("JFIF")) {
1707 int t_w, t_h, v1, v2;
1710 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1711 v1 = get_bits(&s->gb, 8);
1712 v2 = get_bits(&s->gb, 8);
1713 skip_bits(&s->gb, 8);
1715 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1716 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1717 if ( s->avctx->sample_aspect_ratio.num <= 0
1718 || s->avctx->sample_aspect_ratio.den <= 0) {
1719 s->avctx->sample_aspect_ratio.num = 0;
1720 s->avctx->sample_aspect_ratio.den = 1;
1723 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1724 av_log(s->avctx, AV_LOG_INFO,
1725 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1727 s->avctx->sample_aspect_ratio.num,
1728 s->avctx->sample_aspect_ratio.den);
1732 t_w = get_bits(&s->gb, 8);
1733 t_h = get_bits(&s->gb, 8);
1735 /* skip thumbnail */
1736 if (len -10 - (t_w * t_h * 3) > 0)
1737 len -= t_w * t_h * 3;
1744 if ( id == AV_RB32("Adob")
1746 && show_bits(&s->gb, 8) == 'e'
1747 && show_bits_long(&s->gb, 32) != AV_RB32("e_CM")) {
1748 skip_bits(&s->gb, 8); /* 'e' */
1749 skip_bits(&s->gb, 16); /* version */
1750 skip_bits(&s->gb, 16); /* flags0 */
1751 skip_bits(&s->gb, 16); /* flags1 */
1752 s->adobe_transform = get_bits(&s->gb, 8);
1753 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1754 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1759 if (id == AV_RB32("LJIF")) {
1761 int pegasus_rct = s->pegasus_rct;
1762 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1763 av_log(s->avctx, AV_LOG_INFO,
1764 "Pegasus lossless jpeg header found\n");
1765 skip_bits(&s->gb, 16); /* version ? */
1766 skip_bits(&s->gb, 16); /* unknown always 0? */
1767 skip_bits(&s->gb, 16); /* unknown always 0? */
1768 skip_bits(&s->gb, 16); /* unknown always 0? */
1769 switch (i=get_bits(&s->gb, 8)) {
1779 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1784 if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
1785 av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
1790 s->pegasus_rct = pegasus_rct;
1794 if (id == AV_RL32("colr") && len > 0) {
1795 s->colr = get_bits(&s->gb, 8);
1796 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1797 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1801 if (id == AV_RL32("xfrm") && len > 0) {
1802 s->xfrm = get_bits(&s->gb, 8);
1803 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1804 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1809 /* JPS extension by VRex */
1810 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1811 int flags, layout, type;
1812 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1813 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1815 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1816 skip_bits(&s->gb, 16); len -= 2; /* block length */
1817 skip_bits(&s->gb, 8); /* reserved */
1818 flags = get_bits(&s->gb, 8);
1819 layout = get_bits(&s->gb, 8);
1820 type = get_bits(&s->gb, 8);
1823 s->stereo3d = av_stereo3d_alloc();
1828 s->stereo3d->type = AV_STEREO3D_2D;
1829 } else if (type == 1) {
1832 s->stereo3d->type = AV_STEREO3D_LINES;
1835 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1838 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1841 if (!(flags & 0x04)) {
1842 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1849 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1850 GetByteContext gbytes;
1851 int ret, le, ifd_offset, bytes_read;
1852 const uint8_t *aligned;
1854 skip_bits(&s->gb, 16); // skip padding
1857 // init byte wise reading
1858 aligned = align_get_bits(&s->gb);
1859 bytestream2_init(&gbytes, aligned, len);
1862 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1864 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1866 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1868 // read 0th IFD and store the metadata
1869 // (return values > 0 indicate the presence of subimage metadata)
1870 ret = avpriv_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1872 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1876 bytes_read = bytestream2_tell(&gbytes);
1877 skip_bits(&s->gb, bytes_read << 3);
1884 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1885 id = get_bits_long(&s->gb, 32);
1888 if (id == AV_RB32("mjpg")) {
1891 4bytes pad field size
1899 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1900 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1904 if (s->start_code == APP2 && id == AV_RB32("ICC_") && len >= 10) {
1907 unsigned nummarkers;
1909 id = get_bits_long(&s->gb, 32);
1910 id2 = get_bits_long(&s->gb, 24);
1912 if (id != AV_RB32("PROF") || id2 != AV_RB24("ILE")) {
1913 av_log(s->avctx, AV_LOG_WARNING, "Invalid ICC_PROFILE header in APP2\n");
1917 skip_bits(&s->gb, 8);
1918 seqno = get_bits(&s->gb, 8);
1921 av_log(s->avctx, AV_LOG_WARNING, "Invalid sequence number in APP2\n");
1925 nummarkers = get_bits(&s->gb, 8);
1927 if (nummarkers == 0) {
1928 av_log(s->avctx, AV_LOG_WARNING, "Invalid number of markers coded in APP2\n");
1930 } else if (s->iccnum != 0 && nummarkers != s->iccnum) {
1931 av_log(s->avctx, AV_LOG_WARNING, "Mistmatch in coded number of ICC markers between markers\n");
1933 } else if (seqno > nummarkers) {
1934 av_log(s->avctx, AV_LOG_WARNING, "Mismatching sequence number and coded number of ICC markers\n");
1938 /* Allocate if this is the first APP2 we've seen. */
1939 if (s->iccnum == 0) {
1940 s->iccdata = av_mallocz(nummarkers * sizeof(*(s->iccdata)));
1941 s->iccdatalens = av_mallocz(nummarkers * sizeof(*(s->iccdatalens)));
1942 if (!s->iccdata || !s->iccdatalens) {
1943 av_log(s->avctx, AV_LOG_ERROR, "Could not allocate ICC data arrays\n");
1944 return AVERROR(ENOMEM);
1946 s->iccnum = nummarkers;
1949 if (s->iccdata[seqno - 1]) {
1950 av_log(s->avctx, AV_LOG_WARNING, "Duplicate ICC sequence number\n");
1954 s->iccdatalens[seqno - 1] = len;
1955 s->iccdata[seqno - 1] = av_malloc(len);
1956 if (!s->iccdata[seqno - 1]) {
1957 av_log(s->avctx, AV_LOG_ERROR, "Could not allocate ICC data buffer\n");
1958 return AVERROR(ENOMEM);
1961 memcpy(s->iccdata[seqno - 1], align_get_bits(&s->gb), len);
1962 skip_bits(&s->gb, len << 3);
1966 if (s->iccread > s->iccnum)
1967 av_log(s->avctx, AV_LOG_WARNING, "Read more ICC markers than are supposed to be coded\n");
1971 /* slow but needed for extreme adobe jpegs */
1973 av_log(s->avctx, AV_LOG_ERROR,
1974 "mjpeg: error, decode_app parser read over the end\n");
1976 skip_bits(&s->gb, 8);
1981 static int mjpeg_decode_com(MJpegDecodeContext *s)
1983 int len = get_bits(&s->gb, 16);
1984 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1986 char *cbuf = av_malloc(len - 1);
1988 return AVERROR(ENOMEM);
1990 for (i = 0; i < len - 2; i++)
1991 cbuf[i] = get_bits(&s->gb, 8);
1992 if (i > 0 && cbuf[i - 1] == '\n')
1997 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1998 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
2000 /* buggy avid, it puts EOI only at every 10th frame */
2001 if (!strncmp(cbuf, "AVID", 4)) {
2002 parse_avid(s, cbuf, len);
2003 } else if (!strcmp(cbuf, "CS=ITU601"))
2005 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
2006 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
2008 else if (!strcmp(cbuf, "MULTISCOPE II")) {
2009 s->avctx->sample_aspect_ratio = (AVRational) { 1, 2 };
2019 /* return the 8 bit start code value and update the search
2020 state. Return -1 if no start code found */
2021 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
2023 const uint8_t *buf_ptr;
2028 buf_ptr = *pbuf_ptr;
2029 while (buf_end - buf_ptr > 1) {
2032 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
2041 ff_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
2042 *pbuf_ptr = buf_ptr;
2046 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
2047 const uint8_t **buf_ptr, const uint8_t *buf_end,
2048 const uint8_t **unescaped_buf_ptr,
2049 int *unescaped_buf_size)
2052 start_code = find_marker(buf_ptr, buf_end);
2054 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
2056 return AVERROR(ENOMEM);
2058 /* unescape buffer of SOS, use special treatment for JPEG-LS */
2059 if (start_code == SOS && !s->ls) {
2060 const uint8_t *src = *buf_ptr;
2061 const uint8_t *ptr = src;
2062 uint8_t *dst = s->buffer;
2064 #define copy_data_segment(skip) do { \
2065 ptrdiff_t length = (ptr - src) - (skip); \
2067 memcpy(dst, src, length); \
2073 if (s->avctx->codec_id == AV_CODEC_ID_THP) {
2075 copy_data_segment(0);
2077 while (ptr < buf_end) {
2078 uint8_t x = *(ptr++);
2082 while (ptr < buf_end && x == 0xff) {
2087 /* 0xFF, 0xFF, ... */
2089 copy_data_segment(skip);
2091 /* decrement src as it is equal to ptr after the
2092 * copy_data_segment macro and we might want to
2093 * copy the current value of x later on */
2097 if (x < 0xd0 || x > 0xd7) {
2098 copy_data_segment(1);
2105 copy_data_segment(0);
2107 #undef copy_data_segment
2109 *unescaped_buf_ptr = s->buffer;
2110 *unescaped_buf_size = dst - s->buffer;
2111 memset(s->buffer + *unescaped_buf_size, 0,
2112 AV_INPUT_BUFFER_PADDING_SIZE);
2114 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
2115 (buf_end - *buf_ptr) - (dst - s->buffer));
2116 } else if (start_code == SOS && s->ls) {
2117 const uint8_t *src = *buf_ptr;
2118 uint8_t *dst = s->buffer;
2124 while (src + t < buf_end) {
2125 uint8_t x = src[t++];
2127 while ((src + t < buf_end) && x == 0xff)
2136 init_put_bits(&pb, dst, t);
2138 /* unescape bitstream */
2140 uint8_t x = src[b++];
2141 put_bits(&pb, 8, x);
2142 if (x == 0xFF && b < t) {
2145 av_log(s->avctx, AV_LOG_WARNING, "Invalid escape sequence\n");
2148 put_bits(&pb, 7, x);
2152 flush_put_bits(&pb);
2154 *unescaped_buf_ptr = dst;
2155 *unescaped_buf_size = (bit_count + 7) >> 3;
2156 memset(s->buffer + *unescaped_buf_size, 0,
2157 AV_INPUT_BUFFER_PADDING_SIZE);
2159 *unescaped_buf_ptr = *buf_ptr;
2160 *unescaped_buf_size = buf_end - *buf_ptr;
2166 static void reset_icc_profile(MJpegDecodeContext *s)
2171 for (i = 0; i < s->iccnum; i++)
2172 av_freep(&s->iccdata[i]);
2173 av_freep(&s->iccdata);
2174 av_freep(&s->iccdatalens);
2180 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
2183 AVFrame *frame = data;
2184 const uint8_t *buf = avpkt->data;
2185 int buf_size = avpkt->size;
2186 MJpegDecodeContext *s = avctx->priv_data;
2187 const uint8_t *buf_end, *buf_ptr;
2188 const uint8_t *unescaped_buf_ptr;
2190 int unescaped_buf_size;
2196 av_dict_free(&s->exif_metadata);
2197 av_freep(&s->stereo3d);
2198 s->adobe_transform = -1;
2201 reset_icc_profile(s);
2204 buf_end = buf + buf_size;
2205 while (buf_ptr < buf_end) {
2206 /* find start next marker */
2207 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
2209 &unescaped_buf_size);
2211 if (start_code < 0) {
2213 } else if (unescaped_buf_size > INT_MAX / 8) {
2214 av_log(avctx, AV_LOG_ERROR,
2215 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
2216 start_code, unescaped_buf_size, buf_size);
2217 return AVERROR_INVALIDDATA;
2219 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
2220 start_code, buf_end - buf_ptr);
2222 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
2225 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
2229 s->start_code = start_code;
2230 if (s->avctx->debug & FF_DEBUG_STARTCODE)
2231 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
2233 /* process markers */
2234 if (start_code >= 0xd0 && start_code <= 0xd7) {
2235 av_log(avctx, AV_LOG_DEBUG,
2236 "restart marker: %d\n", start_code & 0x0f);
2238 } else if (start_code >= APP0 && start_code <= APP15) {
2239 if ((ret = mjpeg_decode_app(s)) < 0)
2240 av_log(avctx, AV_LOG_ERROR, "unable to decode APP fields: %s\n",
2243 } else if (start_code == COM) {
2244 ret = mjpeg_decode_com(s);
2247 } else if (start_code == DQT) {
2248 ret = ff_mjpeg_decode_dqt(s);
2255 if (!CONFIG_JPEGLS_DECODER &&
2256 (start_code == SOF48 || start_code == LSE)) {
2257 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
2258 return AVERROR(ENOSYS);
2261 if (avctx->skip_frame == AVDISCARD_ALL) {
2262 switch(start_code) {
2277 switch (start_code) {
2279 s->restart_interval = 0;
2280 s->restart_count = 0;
2281 /* nothing to do on SOI */
2284 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
2285 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
2294 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2301 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2305 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2309 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2313 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2317 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2321 if (!CONFIG_JPEGLS_DECODER ||
2322 (ret = ff_jpegls_decode_lse(s)) < 0)
2327 if (avctx->skip_frame != AVDISCARD_ALL && s->progressive && s->cur_scan && s->got_picture)
2328 mjpeg_idct_scan_progressive_ac(s);
2330 if (!s->got_picture) {
2331 av_log(avctx, AV_LOG_WARNING,
2332 "Found EOI before any SOF, ignoring\n");
2335 if (s->interlaced) {
2336 s->bottom_field ^= 1;
2337 /* if not bottom field, do not output image yet */
2338 if (s->bottom_field == !s->interlace_polarity)
2341 if (avctx->skip_frame == AVDISCARD_ALL) {
2343 goto the_end_no_picture;
2345 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2351 int qp = FFMAX3(s->qscale[0],
2354 int qpw = (s->width + 15) / 16;
2355 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2357 memset(qp_table_buf->data, qp, qpw);
2358 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2361 if(avctx->debug & FF_DEBUG_QP)
2362 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2368 if (avctx->skip_frame == AVDISCARD_ALL) {
2369 skip_bits(&s->gb, get_bits_left(&s->gb));
2373 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2374 (avctx->err_recognition & AV_EF_EXPLODE))
2378 if ((ret = mjpeg_decode_dri(s)) < 0)
2391 av_log(avctx, AV_LOG_ERROR,
2392 "mjpeg: unsupported coding type (%x)\n", start_code);
2397 /* eof process start code */
2398 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2399 av_log(avctx, AV_LOG_DEBUG,
2400 "marker parser used %d bytes (%d bits)\n",
2401 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2403 if (s->got_picture && s->cur_scan) {
2404 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2407 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2408 return AVERROR_INVALIDDATA;
2414 is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step > 1;
2416 if (AV_RB32(s->upscale_h)) {
2418 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2419 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2420 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2421 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2422 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2423 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2424 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2425 avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2426 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2427 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2428 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2429 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2431 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2432 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2433 for (p = 0; p<s->nb_components; p++) {
2434 uint8_t *line = s->picture_ptr->data[p];
2437 if (!s->upscale_h[p])
2440 w = AV_CEIL_RSHIFT(w, hshift);
2441 h = AV_CEIL_RSHIFT(h, vshift);
2443 if (s->upscale_v[p])
2446 for (i = 0; i < h; i++) {
2447 if (s->upscale_h[p] == 1) {
2448 if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2449 else line[w - 1] = line[(w - 1) / 2];
2450 for (index = w - 2; index > 0; index--) {
2452 ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2454 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2456 } else if (s->upscale_h[p] == 2) {
2458 ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 3];
2460 ((uint16_t*)line)[w - 2] = ((uint16_t*)line)[w - 1];
2462 line[w - 1] = line[(w - 1) / 3];
2464 line[w - 2] = line[w - 1];
2466 for (index = w - 3; index > 0; index--) {
2467 line[index] = (line[index / 3] + line[(index + 1) / 3] + line[(index + 2) / 3] + 1) / 3;
2470 line += s->linesize[p];
2474 if (AV_RB32(s->upscale_v)) {
2476 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2477 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2478 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2479 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2480 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2481 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2482 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2483 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2484 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2485 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2486 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2487 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2488 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2490 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2491 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2492 for (p = 0; p < s->nb_components; p++) {
2496 if (!s->upscale_v[p])
2499 w = AV_CEIL_RSHIFT(w, hshift);
2500 h = AV_CEIL_RSHIFT(h, vshift);
2502 dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2503 for (i = h - 1; i; i--) {
2504 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2505 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2506 if (src1 == src2 || i == h - 1) {
2507 memcpy(dst, src1, w);
2509 for (index = 0; index < w; index++)
2510 dst[index] = (src1[index] + src2[index]) >> 1;
2512 dst -= s->linesize[p];
2516 if (s->flipped && !s->rgb) {
2518 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2519 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2520 for (index=0; index<s->nb_components; index++) {
2521 uint8_t *dst = s->picture_ptr->data[index];
2522 int w = s->picture_ptr->width;
2523 int h = s->picture_ptr->height;
2524 if(index && index<3){
2525 w = AV_CEIL_RSHIFT(w, hshift);
2526 h = AV_CEIL_RSHIFT(h, vshift);
2529 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2530 for (i=0; i<h/2; i++) {
2532 FFSWAP(int, dst[j], dst2[j]);
2533 dst += s->picture_ptr->linesize[index];
2534 dst2 -= s->picture_ptr->linesize[index];
2539 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2540 int w = s->picture_ptr->width;
2541 int h = s->picture_ptr->height;
2542 av_assert0(s->nb_components == 4);
2543 for (i=0; i<h; i++) {
2546 for (index=0; index<4; index++) {
2547 dst[index] = s->picture_ptr->data[index]
2548 + s->picture_ptr->linesize[index]*i;
2550 for (j=0; j<w; j++) {
2552 int r = dst[0][j] * k;
2553 int g = dst[1][j] * k;
2554 int b = dst[2][j] * k;
2555 dst[0][j] = g*257 >> 16;
2556 dst[1][j] = b*257 >> 16;
2557 dst[2][j] = r*257 >> 16;
2562 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2563 int w = s->picture_ptr->width;
2564 int h = s->picture_ptr->height;
2565 av_assert0(s->nb_components == 4);
2566 for (i=0; i<h; i++) {
2569 for (index=0; index<4; index++) {
2570 dst[index] = s->picture_ptr->data[index]
2571 + s->picture_ptr->linesize[index]*i;
2573 for (j=0; j<w; j++) {
2575 int r = (255 - dst[0][j]) * k;
2576 int g = (128 - dst[1][j]) * k;
2577 int b = (128 - dst[2][j]) * k;
2578 dst[0][j] = r*257 >> 16;
2579 dst[1][j] = (g*257 >> 16) + 128;
2580 dst[2][j] = (b*257 >> 16) + 128;
2587 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2589 stereo->type = s->stereo3d->type;
2590 stereo->flags = s->stereo3d->flags;
2592 av_freep(&s->stereo3d);
2595 if (s->iccnum != 0 && s->iccnum == s->iccread) {
2596 AVFrameSideData *sd;
2601 /* Sum size of all parts. */
2602 for (i = 0; i < s->iccnum; i++)
2603 total_size += s->iccdatalens[i];
2605 sd = av_frame_new_side_data(data, AV_FRAME_DATA_ICC_PROFILE, total_size);
2607 av_log(s->avctx, AV_LOG_ERROR, "Could not allocate frame side data\n");
2608 return AVERROR(ENOMEM);
2611 /* Reassemble the parts, which are now in-order. */
2612 for (i = 0; i < s->iccnum; i++) {
2613 memcpy(sd->data + offset, s->iccdata[i], s->iccdatalens[i]);
2614 offset += s->iccdatalens[i];
2618 av_dict_copy(&((AVFrame *) data)->metadata, s->exif_metadata, 0);
2619 av_dict_free(&s->exif_metadata);
2622 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2624 // return buf_end - buf_ptr;
2625 return buf_ptr - buf;
2628 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2630 MJpegDecodeContext *s = avctx->priv_data;
2633 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2634 av_log(avctx, AV_LOG_INFO, "Single field\n");
2638 av_frame_free(&s->picture);
2639 s->picture_ptr = NULL;
2640 } else if (s->picture_ptr)
2641 av_frame_unref(s->picture_ptr);
2643 av_freep(&s->buffer);
2644 av_freep(&s->stereo3d);
2645 av_freep(&s->ljpeg_buffer);
2646 s->ljpeg_buffer_size = 0;
2648 for (i = 0; i < 3; i++) {
2649 for (j = 0; j < 4; j++)
2650 ff_free_vlc(&s->vlcs[i][j]);
2652 for (i = 0; i < MAX_COMPONENTS; i++) {
2653 av_freep(&s->blocks[i]);
2654 av_freep(&s->last_nnz[i]);
2656 av_dict_free(&s->exif_metadata);
2658 reset_icc_profile(s);
2663 static void decode_flush(AVCodecContext *avctx)
2665 MJpegDecodeContext *s = avctx->priv_data;
2669 #if CONFIG_MJPEG_DECODER
2670 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2671 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2672 static const AVOption options[] = {
2673 { "extern_huff", "Use external huffman table.",
2674 OFFSET(extern_huff), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
2678 static const AVClass mjpegdec_class = {
2679 .class_name = "MJPEG decoder",
2680 .item_name = av_default_item_name,
2682 .version = LIBAVUTIL_VERSION_INT,
2685 AVCodec ff_mjpeg_decoder = {
2687 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2688 .type = AVMEDIA_TYPE_VIDEO,
2689 .id = AV_CODEC_ID_MJPEG,
2690 .priv_data_size = sizeof(MJpegDecodeContext),
2691 .init = ff_mjpeg_decode_init,
2692 .close = ff_mjpeg_decode_end,
2693 .decode = ff_mjpeg_decode_frame,
2694 .flush = decode_flush,
2695 .capabilities = AV_CODEC_CAP_DR1,
2697 .priv_class = &mjpegdec_class,
2698 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
2699 FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2702 #if CONFIG_THP_DECODER
2703 AVCodec ff_thp_decoder = {
2705 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2706 .type = AVMEDIA_TYPE_VIDEO,
2707 .id = AV_CODEC_ID_THP,
2708 .priv_data_size = sizeof(MJpegDecodeContext),
2709 .init = ff_mjpeg_decode_init,
2710 .close = ff_mjpeg_decode_end,
2711 .decode = ff_mjpeg_decode_frame,
2712 .flush = decode_flush,
2713 .capabilities = AV_CODEC_CAP_DR1,
2715 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,