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 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
103 MJpegDecodeContext *s = avctx->priv_data;
105 if (!s->picture_ptr) {
106 s->picture = av_frame_alloc();
108 return AVERROR(ENOMEM);
109 s->picture_ptr = s->picture;
113 ff_blockdsp_init(&s->bdsp, avctx);
114 ff_hpeldsp_init(&s->hdsp, avctx->flags);
115 ff_idctdsp_init(&s->idsp, avctx);
116 ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
121 s->first_picture = 1;
123 s->org_height = avctx->coded_height;
124 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
125 avctx->colorspace = AVCOL_SPC_BT470BG;
127 build_basic_mjpeg_vlc(s);
129 if (s->extern_huff) {
130 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
131 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
132 if (ff_mjpeg_decode_dht(s)) {
133 av_log(avctx, AV_LOG_ERROR,
134 "error using external huffman table, switching back to internal\n");
135 build_basic_mjpeg_vlc(s);
138 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
139 s->interlace_polarity = 1; /* bottom field first */
140 av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
141 } else if (avctx->field_order == AV_FIELD_UNKNOWN) {
142 if (avctx->codec_tag == AV_RL32("MJPG"))
143 s->interlace_polarity = 1;
146 if ( avctx->extradata_size > 8
147 && AV_RL32(avctx->extradata) == 0x2C
148 && AV_RL32(avctx->extradata+4) == 0x18) {
149 parse_avid(s, avctx->extradata, avctx->extradata_size);
152 if (avctx->codec->id == AV_CODEC_ID_AMV)
159 /* quantize tables */
160 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
162 int len, index, i, j;
164 len = get_bits(&s->gb, 16) - 2;
166 if (8*len > get_bits_left(&s->gb)) {
167 av_log(s->avctx, AV_LOG_ERROR, "dqt: len %d is too large\n", len);
168 return AVERROR_INVALIDDATA;
172 int pr = get_bits(&s->gb, 4);
174 av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
175 return AVERROR_INVALIDDATA;
177 index = get_bits(&s->gb, 4);
180 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
181 /* read quant table */
182 for (i = 0; i < 64; i++) {
183 j = s->scantable.permutated[i];
184 s->quant_matrixes[index][j] = get_bits(&s->gb, pr ? 16 : 8);
187 // XXX FIXME finetune, and perhaps add dc too
188 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
189 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
190 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
191 index, s->qscale[index]);
192 len -= 1 + 64 * (1+pr);
197 /* decode huffman tables and build VLC decoders */
198 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
200 int len, index, i, class, n, v, code_max;
201 uint8_t bits_table[17];
202 uint8_t val_table[256];
205 len = get_bits(&s->gb, 16) - 2;
207 if (8*len > get_bits_left(&s->gb)) {
208 av_log(s->avctx, AV_LOG_ERROR, "dht: len %d is too large\n", len);
209 return AVERROR_INVALIDDATA;
214 return AVERROR_INVALIDDATA;
215 class = get_bits(&s->gb, 4);
217 return AVERROR_INVALIDDATA;
218 index = get_bits(&s->gb, 4);
220 return AVERROR_INVALIDDATA;
222 for (i = 1; i <= 16; i++) {
223 bits_table[i] = get_bits(&s->gb, 8);
227 if (len < n || n > 256)
228 return AVERROR_INVALIDDATA;
231 for (i = 0; i < n; i++) {
232 v = get_bits(&s->gb, 8);
239 /* build VLC and flush previous vlc if present */
240 ff_free_vlc(&s->vlcs[class][index]);
241 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
242 class, index, code_max + 1);
243 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
244 code_max + 1, 0, class > 0)) < 0)
248 ff_free_vlc(&s->vlcs[2][index]);
249 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
250 code_max + 1, 0, 0)) < 0)
257 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
259 int len, nb_components, i, width, height, bits, ret;
261 int h_count[MAX_COMPONENTS] = { 0 };
262 int v_count[MAX_COMPONENTS] = { 0 };
265 memset(s->upscale_h, 0, sizeof(s->upscale_h));
266 memset(s->upscale_v, 0, sizeof(s->upscale_v));
268 /* XXX: verify len field validity */
269 len = get_bits(&s->gb, 16);
270 s->avctx->bits_per_raw_sample =
271 bits = get_bits(&s->gb, 8);
273 if (bits > 16 || bits < 1) {
274 av_log(s->avctx, AV_LOG_ERROR, "bits %d is invalid\n", bits);
275 return AVERROR_INVALIDDATA;
280 if (bits == 9 && !s->pegasus_rct)
281 s->rct = 1; // FIXME ugly
283 if(s->lossless && s->avctx->lowres){
284 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
288 height = get_bits(&s->gb, 16);
289 width = get_bits(&s->gb, 16);
291 // HACK for odd_height.mov
292 if (s->interlaced && s->width == width && s->height == height + 1)
295 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
296 if (av_image_check_size(width, height, 0, s->avctx))
297 return AVERROR_INVALIDDATA;
299 nb_components = get_bits(&s->gb, 8);
300 if (nb_components <= 0 ||
301 nb_components > MAX_COMPONENTS)
303 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
304 if (nb_components != s->nb_components) {
305 av_log(s->avctx, AV_LOG_ERROR,
306 "nb_components changing in interlaced picture\n");
307 return AVERROR_INVALIDDATA;
310 if (s->ls && !(bits <= 8 || nb_components == 1)) {
311 avpriv_report_missing_feature(s->avctx,
312 "JPEG-LS that is not <= 8 "
313 "bits/component or 16-bit gray");
314 return AVERROR_PATCHWELCOME;
316 s->nb_components = nb_components;
319 for (i = 0; i < nb_components; i++) {
321 s->component_id[i] = get_bits(&s->gb, 8) - 1;
322 h_count[i] = get_bits(&s->gb, 4);
323 v_count[i] = get_bits(&s->gb, 4);
324 /* compute hmax and vmax (only used in interleaved case) */
325 if (h_count[i] > s->h_max)
326 s->h_max = h_count[i];
327 if (v_count[i] > s->v_max)
328 s->v_max = v_count[i];
329 s->quant_index[i] = get_bits(&s->gb, 8);
330 if (s->quant_index[i] >= 4) {
331 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
332 return AVERROR_INVALIDDATA;
334 if (!h_count[i] || !v_count[i]) {
335 av_log(s->avctx, AV_LOG_ERROR,
336 "Invalid sampling factor in component %d %d:%d\n",
337 i, h_count[i], v_count[i]);
338 return AVERROR_INVALIDDATA;
341 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
342 i, h_count[i], v_count[i],
343 s->component_id[i], s->quant_index[i]);
345 if ( nb_components == 4
346 && s->component_id[0] == 'C' - 1
347 && s->component_id[1] == 'M' - 1
348 && s->component_id[2] == 'Y' - 1
349 && s->component_id[3] == 'K' - 1)
350 s->adobe_transform = 0;
352 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
353 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
354 return AVERROR_PATCHWELCOME;
358 /* if different size, realloc/alloc picture */
359 if (width != s->width || height != s->height || bits != s->bits ||
360 memcmp(s->h_count, h_count, sizeof(h_count)) ||
361 memcmp(s->v_count, v_count, sizeof(v_count))) {
366 memcpy(s->h_count, h_count, sizeof(h_count));
367 memcpy(s->v_count, v_count, sizeof(v_count));
371 /* test interlaced mode */
372 if (s->first_picture &&
373 (s->multiscope != 2 || s->avctx->time_base.den >= 25 * s->avctx->time_base.num) &&
374 s->org_height != 0 &&
375 s->height < ((s->org_height * 3) / 4)) {
377 s->bottom_field = s->interlace_polarity;
378 s->picture_ptr->interlaced_frame = 1;
379 s->picture_ptr->top_field_first = !s->interlace_polarity;
383 ret = ff_set_dimensions(s->avctx, width, height);
387 s->first_picture = 0;
390 if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
391 if (s->progressive) {
392 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
393 return AVERROR_INVALIDDATA;
396 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
398 else if (!s->lossless)
400 /* XXX: not complete test ! */
401 pix_fmt_id = ((unsigned)s->h_count[0] << 28) | (s->v_count[0] << 24) |
402 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
403 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
404 (s->h_count[3] << 4) | s->v_count[3];
405 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
406 /* NOTE we do not allocate pictures large enough for the possible
407 * padding of h/v_count being 4 */
408 if (!(pix_fmt_id & 0xD0D0D0D0))
409 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
410 if (!(pix_fmt_id & 0x0D0D0D0D))
411 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
413 for (i = 0; i < 8; i++) {
414 int j = 6 + (i&1) - (i&6);
415 int is = (pix_fmt_id >> (4*i)) & 0xF;
416 int js = (pix_fmt_id >> (4*j)) & 0xF;
418 if (is == 1 && js != 2 && (i < 2 || i > 5))
419 js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
420 if (is == 1 && js != 2 && (i < 2 || i > 5))
421 js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
423 if (is == 1 && js == 2) {
424 if (i & 1) s->upscale_h[j/2] = 1;
425 else s->upscale_v[j/2] = 1;
429 switch (pix_fmt_id) {
432 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
434 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
435 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
437 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
438 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
439 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
442 av_assert0(s->nb_components == 3);
446 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
448 if (s->adobe_transform == 0 && s->bits <= 8) {
449 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
451 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
452 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
455 av_assert0(s->nb_components == 4);
459 if (s->adobe_transform == 0 && s->bits <= 8) {
460 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
461 s->upscale_v[1] = s->upscale_v[2] = 1;
462 s->upscale_h[1] = s->upscale_h[2] = 1;
463 } else if (s->adobe_transform == 2 && s->bits <= 8) {
464 s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
465 s->upscale_v[1] = s->upscale_v[2] = 1;
466 s->upscale_h[1] = s->upscale_h[2] = 1;
467 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
469 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
470 else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
471 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
473 av_assert0(s->nb_components == 4);
479 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
482 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
487 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
490 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
502 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
504 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
511 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
512 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
515 s->upscale_v[0] = s->upscale_v[1] = 1;
517 if (pix_fmt_id == 0x14111100)
518 s->upscale_v[1] = s->upscale_v[2] = 1;
519 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
522 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
526 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
527 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
530 s->upscale_h[0] = s->upscale_h[1] = 1;
532 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
533 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
534 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
540 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
541 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
542 s->upscale_h[1] = s->upscale_h[2] = 2;
546 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
549 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
554 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
555 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
556 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
557 if (pix_fmt_id == 0x42111100) {
560 s->upscale_h[1] = s->upscale_h[2] = 1;
561 } else if (pix_fmt_id == 0x24111100) {
564 s->upscale_v[1] = s->upscale_v[2] = 1;
568 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
571 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
575 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x bits:%d\n", pix_fmt_id, s->bits);
576 memset(s->upscale_h, 0, sizeof(s->upscale_h));
577 memset(s->upscale_v, 0, sizeof(s->upscale_v));
578 return AVERROR_PATCHWELCOME;
580 if ((AV_RB32(s->upscale_h) || AV_RB32(s->upscale_v)) && s->avctx->lowres) {
581 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
582 return AVERROR_PATCHWELCOME;
585 memset(s->upscale_h, 0, sizeof(s->upscale_h));
586 memset(s->upscale_v, 0, sizeof(s->upscale_v));
587 if (s->nb_components == 3) {
588 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
589 } else if (s->nb_components != 1) {
590 av_log(s->avctx, AV_LOG_ERROR, "Unsupported number of components %d\n", s->nb_components);
591 return AVERROR_PATCHWELCOME;
592 } else if (s->palette_index && s->bits <= 8)
593 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
594 else if (s->bits <= 8)
595 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
597 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
600 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
602 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
606 av_frame_unref(s->picture_ptr);
607 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
609 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
610 s->picture_ptr->key_frame = 1;
613 for (i = 0; i < 4; i++)
614 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
616 ff_dlog(s->avctx, "%d %d %d %d %d %d\n",
617 s->width, s->height, s->linesize[0], s->linesize[1],
618 s->interlaced, s->avctx->height);
620 if (len != (8 + (3 * nb_components)))
621 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
624 if (s->rgb && !s->lossless && !s->ls) {
625 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
626 return AVERROR_PATCHWELCOME;
629 /* totally blank picture as progressive JPEG will only add details to it */
630 if (s->progressive) {
631 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
632 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
633 for (i = 0; i < s->nb_components; i++) {
634 int size = bw * bh * s->h_count[i] * s->v_count[i];
635 av_freep(&s->blocks[i]);
636 av_freep(&s->last_nnz[i]);
637 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
638 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
639 if (!s->blocks[i] || !s->last_nnz[i])
640 return AVERROR(ENOMEM);
641 s->block_stride[i] = bw * s->h_count[i];
643 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
648 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
651 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
652 if (code < 0 || code > 16) {
653 av_log(s->avctx, AV_LOG_WARNING,
654 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
655 0, dc_index, &s->vlcs[0][dc_index]);
660 return get_xbits(&s->gb, code);
665 /* decode block and dequantize */
666 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
667 int dc_index, int ac_index, int16_t *quant_matrix)
669 int code, i, j, level, val;
672 val = mjpeg_decode_dc(s, dc_index);
673 if (val == 0xfffff) {
674 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
675 return AVERROR_INVALIDDATA;
677 val = val * quant_matrix[0] + s->last_dc[component];
678 val = FFMIN(val, 32767);
679 s->last_dc[component] = val;
683 {OPEN_READER(re, &s->gb);
685 UPDATE_CACHE(re, &s->gb);
686 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
688 i += ((unsigned)code) >> 4;
691 if (code > MIN_CACHE_BITS - 16)
692 UPDATE_CACHE(re, &s->gb);
695 int cache = GET_CACHE(re, &s->gb);
696 int sign = (~cache) >> 31;
697 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
700 LAST_SKIP_BITS(re, &s->gb, code);
703 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
704 return AVERROR_INVALIDDATA;
706 j = s->scantable.permutated[i];
707 block[j] = level * quant_matrix[j];
710 CLOSE_READER(re, &s->gb);}
715 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
716 int component, int dc_index,
717 int16_t *quant_matrix, int Al)
720 s->bdsp.clear_block(block);
721 val = mjpeg_decode_dc(s, dc_index);
722 if (val == 0xfffff) {
723 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
724 return AVERROR_INVALIDDATA;
726 val = (val * (quant_matrix[0] << Al)) + s->last_dc[component];
727 s->last_dc[component] = val;
732 /* decode block and dequantize - progressive JPEG version */
733 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
734 uint8_t *last_nnz, int ac_index,
735 int16_t *quant_matrix,
736 int ss, int se, int Al, int *EOBRUN)
738 int code, i, j, level, val, run;
746 OPEN_READER(re, &s->gb);
747 for (i = ss; ; i++) {
748 UPDATE_CACHE(re, &s->gb);
749 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
751 run = ((unsigned) code) >> 4;
755 if (code > MIN_CACHE_BITS - 16)
756 UPDATE_CACHE(re, &s->gb);
759 int cache = GET_CACHE(re, &s->gb);
760 int sign = (~cache) >> 31;
761 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
764 LAST_SKIP_BITS(re, &s->gb, code);
768 j = s->scantable.permutated[se];
769 block[j] = level * (quant_matrix[j] << Al);
772 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
773 return AVERROR_INVALIDDATA;
775 j = s->scantable.permutated[i];
776 block[j] = level * (quant_matrix[j] << Al);
778 if (run == 0xF) {// ZRL - skip 15 coefficients
781 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
782 return AVERROR_INVALIDDATA;
787 UPDATE_CACHE(re, &s->gb);
788 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
789 LAST_SKIP_BITS(re, &s->gb, run);
796 CLOSE_READER(re, &s->gb);
805 #define REFINE_BIT(j) { \
806 UPDATE_CACHE(re, &s->gb); \
807 sign = block[j] >> 15; \
808 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
809 ((quant_matrix[j] ^ sign) - sign) << Al; \
810 LAST_SKIP_BITS(re, &s->gb, 1); \
818 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
823 j = s->scantable.permutated[i]; \
826 else if (run-- == 0) \
830 /* decode block and dequantize - progressive JPEG refinement pass */
831 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
833 int ac_index, int16_t *quant_matrix,
834 int ss, int se, int Al, int *EOBRUN)
836 int code, i = ss, j, sign, val, run;
837 int last = FFMIN(se, *last_nnz);
839 OPEN_READER(re, &s->gb);
844 UPDATE_CACHE(re, &s->gb);
845 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
848 run = ((unsigned) code) >> 4;
849 UPDATE_CACHE(re, &s->gb);
850 val = SHOW_UBITS(re, &s->gb, 1);
851 LAST_SKIP_BITS(re, &s->gb, 1);
853 j = s->scantable.permutated[i];
855 block[j] = ((quant_matrix[j] << Al) ^ val) - val;
859 CLOSE_READER(re, &s->gb);
863 run = ((unsigned) code) >> 4;
870 UPDATE_CACHE(re, &s->gb);
871 run += SHOW_UBITS(re, &s->gb, val);
872 LAST_SKIP_BITS(re, &s->gb, val);
884 for (; i <= last; i++) {
885 j = s->scantable.permutated[i];
889 CLOSE_READER(re, &s->gb);
896 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
901 if (s->restart_interval) {
903 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
904 align_get_bits(&s->gb);
905 for (i = 0; i < nb_components; i++) /* reset dc */
906 s->last_dc[i] = (4 << s->bits);
909 i = 8 + ((-get_bits_count(&s->gb)) & 7);
911 if (s->restart_count == 0) {
912 if( show_bits(&s->gb, i) == (1 << i) - 1
913 || show_bits(&s->gb, i) == 0xFF) {
914 int pos = get_bits_count(&s->gb);
915 align_get_bits(&s->gb);
916 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
917 skip_bits(&s->gb, 8);
918 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
919 for (i = 0; i < nb_components; i++) /* reset dc */
920 s->last_dc[i] = (4 << s->bits);
923 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
930 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
933 uint16_t (*buffer)[4];
934 int left[4], top[4], topleft[4];
935 const int linesize = s->linesize[0];
936 const int mask = ((1 << s->bits) - 1) << point_transform;
940 if (s->nb_components != 3 && s->nb_components != 4)
941 return AVERROR_INVALIDDATA;
942 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
943 return AVERROR_INVALIDDATA;
946 s->restart_count = s->restart_interval;
948 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
949 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
950 buffer = s->ljpeg_buffer;
952 for (i = 0; i < 4; i++)
953 buffer[0][i] = 1 << (s->bits - 1);
955 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
956 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
958 if (s->interlaced && s->bottom_field)
959 ptr += linesize >> 1;
961 for (i = 0; i < 4; i++)
962 top[i] = left[i] = topleft[i] = buffer[0][i];
964 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
965 int modified_predictor = predictor;
967 if (s->restart_interval && !s->restart_count){
968 s->restart_count = s->restart_interval;
972 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
974 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
975 modified_predictor = 1;
977 for (i=0;i<nb_components;i++) {
981 top[i] = buffer[mb_x][i];
983 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
985 dc = mjpeg_decode_dc(s, s->dc_index[i]);
989 left[i] = buffer[mb_x][i] =
990 mask & (pred + (dc << point_transform));
993 if (s->restart_interval && !--s->restart_count) {
994 align_get_bits(&s->gb);
995 skip_bits(&s->gb, 16); /* skip RSTn */
998 if (s->rct && s->nb_components == 4) {
999 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1000 ptr[4*mb_x + 2] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1001 ptr[4*mb_x + 1] = buffer[mb_x][1] + ptr[4*mb_x + 2];
1002 ptr[4*mb_x + 3] = buffer[mb_x][2] + ptr[4*mb_x + 2];
1003 ptr[4*mb_x + 0] = buffer[mb_x][3];
1005 } else if (s->nb_components == 4) {
1006 for(i=0; i<nb_components; i++) {
1007 int c= s->comp_index[i];
1009 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1010 ptr[4*mb_x+3-c] = buffer[mb_x][i];
1012 } else if(s->bits == 9) {
1013 return AVERROR_PATCHWELCOME;
1015 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1016 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
1020 } else if (s->rct) {
1021 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1022 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1023 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1024 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1026 } else if (s->pegasus_rct) {
1027 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1028 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
1029 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1030 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1033 for(i=0; i<nb_components; i++) {
1034 int c= s->comp_index[i];
1036 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1037 ptr[3*mb_x+2-c] = buffer[mb_x][i];
1039 } else if(s->bits == 9) {
1040 return AVERROR_PATCHWELCOME;
1042 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1043 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
1052 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1053 int point_transform, int nb_components)
1055 int i, mb_x, mb_y, mask;
1056 int bits= (s->bits+7)&~7;
1057 int resync_mb_y = 0;
1058 int resync_mb_x = 0;
1060 point_transform += bits - s->bits;
1061 mask = ((1 << s->bits) - 1) << point_transform;
1063 av_assert0(nb_components>=1 && nb_components<=4);
1065 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1066 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1067 if (s->restart_interval && !s->restart_count){
1068 s->restart_count = s->restart_interval;
1073 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1074 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1075 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1076 for (i = 0; i < nb_components; i++) {
1079 int n, h, v, x, y, c, j, linesize;
1080 n = s->nb_blocks[i];
1081 c = s->comp_index[i];
1086 linesize= s->linesize[c];
1088 if(bits>8) linesize /= 2;
1090 for(j=0; j<n; j++) {
1093 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1097 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1099 if(x==0 && leftcol){
1100 pred= 1 << (bits - 1);
1105 if(x==0 && leftcol){
1106 pred= ptr[-linesize];
1108 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1112 if (s->interlaced && s->bottom_field)
1113 ptr += linesize >> 1;
1115 *ptr= pred + (dc << point_transform);
1117 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1119 if(x==0 && leftcol){
1120 pred= 1 << (bits - 1);
1125 if(x==0 && leftcol){
1126 pred= ptr16[-linesize];
1128 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1132 if (s->interlaced && s->bottom_field)
1133 ptr16 += linesize >> 1;
1135 *ptr16= pred + (dc << point_transform);
1144 for (i = 0; i < nb_components; i++) {
1147 int n, h, v, x, y, c, j, linesize, dc;
1148 n = s->nb_blocks[i];
1149 c = s->comp_index[i];
1154 linesize = s->linesize[c];
1156 if(bits>8) linesize /= 2;
1158 for (j = 0; j < n; j++) {
1161 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1165 ptr = s->picture_ptr->data[c] +
1166 (linesize * (v * mb_y + y)) +
1167 (h * mb_x + x); //FIXME optimize this crap
1168 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1171 *ptr = pred + (dc << point_transform);
1173 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1174 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1177 *ptr16= pred + (dc << point_transform);
1187 if (s->restart_interval && !--s->restart_count) {
1188 align_get_bits(&s->gb);
1189 skip_bits(&s->gb, 16); /* skip RSTn */
1196 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1197 uint8_t *dst, const uint8_t *src,
1198 int linesize, int lowres)
1201 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1203 case 1: copy_block4(dst, src, linesize, linesize, 4);
1205 case 2: copy_block2(dst, src, linesize, linesize, 2);
1207 case 3: *dst = *src;
1212 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1214 int block_x, block_y;
1215 int size = 8 >> s->avctx->lowres;
1217 for (block_y=0; block_y<size; block_y++)
1218 for (block_x=0; block_x<size; block_x++)
1219 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1221 for (block_y=0; block_y<size; block_y++)
1222 for (block_x=0; block_x<size; block_x++)
1223 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1227 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1228 int Al, const uint8_t *mb_bitmask,
1229 int mb_bitmask_size,
1230 const AVFrame *reference)
1233 uint8_t *data[MAX_COMPONENTS];
1234 const uint8_t *reference_data[MAX_COMPONENTS];
1235 int linesize[MAX_COMPONENTS];
1236 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1237 int bytes_per_pixel = 1 + (s->bits > 8);
1240 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1241 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1242 return AVERROR_INVALIDDATA;
1244 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1247 s->restart_count = 0;
1249 for (i = 0; i < nb_components; i++) {
1250 int c = s->comp_index[i];
1251 data[c] = s->picture_ptr->data[c];
1252 reference_data[c] = reference ? reference->data[c] : NULL;
1253 linesize[c] = s->linesize[c];
1254 s->coefs_finished[c] |= 1;
1257 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1258 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1259 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1261 if (s->restart_interval && !s->restart_count)
1262 s->restart_count = s->restart_interval;
1264 if (get_bits_left(&s->gb) < 0) {
1265 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1266 -get_bits_left(&s->gb));
1267 return AVERROR_INVALIDDATA;
1269 for (i = 0; i < nb_components; i++) {
1271 int n, h, v, x, y, c, j;
1273 n = s->nb_blocks[i];
1274 c = s->comp_index[i];
1279 for (j = 0; j < n; j++) {
1280 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1281 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1283 if (s->interlaced && s->bottom_field)
1284 block_offset += linesize[c] >> 1;
1285 if ( 8*(h * mb_x + x) < s->width
1286 && 8*(v * mb_y + y) < s->height) {
1287 ptr = data[c] + block_offset;
1290 if (!s->progressive) {
1293 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1294 linesize[c], s->avctx->lowres);
1297 s->bdsp.clear_block(s->block);
1298 if (decode_block(s, s->block, i,
1299 s->dc_index[i], s->ac_index[i],
1300 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1301 av_log(s->avctx, AV_LOG_ERROR,
1302 "error y=%d x=%d\n", mb_y, mb_x);
1303 return AVERROR_INVALIDDATA;
1306 s->idsp.idct_put(ptr, linesize[c], s->block);
1308 shift_output(s, ptr, linesize[c]);
1312 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1314 int16_t *block = s->blocks[c][block_idx];
1316 block[0] += get_bits1(&s->gb) *
1317 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1318 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1319 s->quant_matrixes[s->quant_sindex[i]],
1321 av_log(s->avctx, AV_LOG_ERROR,
1322 "error y=%d x=%d\n", mb_y, mb_x);
1323 return AVERROR_INVALIDDATA;
1326 ff_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1327 ff_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1328 mb_x, mb_y, x, y, c, s->bottom_field,
1329 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1337 handle_rstn(s, nb_components);
1343 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1344 int se, int Ah, int Al)
1348 int c = s->comp_index[0];
1349 uint8_t *data = s->picture_ptr->data[c];
1350 int linesize = s->linesize[c];
1352 int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1353 int bytes_per_pixel = 1 + (s->bits > 8);
1355 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1356 if (se < ss || se > 63) {
1357 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1358 return AVERROR_INVALIDDATA;
1362 // s->coefs_finished is a bitmask for coefficients coded
1363 // ss and se are parameters telling start and end coefficients
1364 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1365 last_scan = !~s->coefs_finished[c];
1368 if (s->interlaced && s->bottom_field)
1369 data += linesize >> 1;
1371 s->restart_count = 0;
1373 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1374 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1375 int block_idx = mb_y * s->block_stride[c];
1376 int16_t (*block)[64] = &s->blocks[c][block_idx];
1377 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1378 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1380 if (s->restart_interval && !s->restart_count)
1381 s->restart_count = s->restart_interval;
1384 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1385 quant_matrix, ss, se, Al, &EOBRUN);
1387 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1388 quant_matrix, ss, se, Al, &EOBRUN);
1390 av_log(s->avctx, AV_LOG_ERROR,
1391 "error y=%d x=%d\n", mb_y, mb_x);
1392 return AVERROR_INVALIDDATA;
1396 s->idsp.idct_put(ptr, linesize, *block);
1398 shift_output(s, ptr, linesize);
1399 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1401 if (handle_rstn(s, 0))
1408 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1409 int mb_bitmask_size, const AVFrame *reference)
1411 int len, nb_components, i, h, v, predictor, point_transform;
1413 const int block_size = s->lossless ? 1 : 8;
1414 int ilv, prev_shift;
1416 if (!s->got_picture) {
1417 av_log(s->avctx, AV_LOG_WARNING,
1418 "Can not process SOS before SOF, skipping\n");
1422 av_assert0(s->picture_ptr->data[0]);
1423 /* XXX: verify len field validity */
1424 len = get_bits(&s->gb, 16);
1425 nb_components = get_bits(&s->gb, 8);
1426 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1427 av_log(s->avctx, AV_LOG_ERROR,
1428 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1429 return AVERROR_PATCHWELCOME;
1431 if (len != 6 + 2 * nb_components) {
1432 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1433 return AVERROR_INVALIDDATA;
1435 for (i = 0; i < nb_components; i++) {
1436 id = get_bits(&s->gb, 8) - 1;
1437 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1438 /* find component index */
1439 for (index = 0; index < s->nb_components; index++)
1440 if (id == s->component_id[index])
1442 if (index == s->nb_components) {
1443 av_log(s->avctx, AV_LOG_ERROR,
1444 "decode_sos: index(%d) out of components\n", index);
1445 return AVERROR_INVALIDDATA;
1447 /* Metasoft MJPEG codec has Cb and Cr swapped */
1448 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1449 && nb_components == 3 && s->nb_components == 3 && i)
1452 s->quant_sindex[i] = s->quant_index[index];
1453 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1454 s->h_scount[i] = s->h_count[index];
1455 s->v_scount[i] = s->v_count[index];
1457 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1459 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1460 index = (index+2)%3;
1462 s->comp_index[i] = index;
1464 s->dc_index[i] = get_bits(&s->gb, 4);
1465 s->ac_index[i] = get_bits(&s->gb, 4);
1467 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1468 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1470 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))
1474 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1475 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1476 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1477 prev_shift = get_bits(&s->gb, 4); /* Ah */
1478 point_transform = get_bits(&s->gb, 4); /* Al */
1480 prev_shift = point_transform = 0;
1482 if (nb_components > 1) {
1483 /* interleaved stream */
1484 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1485 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1486 } else if (!s->ls) { /* skip this for JPEG-LS */
1487 h = s->h_max / s->h_scount[0];
1488 v = s->v_max / s->v_scount[0];
1489 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1490 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1491 s->nb_blocks[0] = 1;
1496 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1497 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1498 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1499 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1500 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1503 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1504 for (i = s->mjpb_skiptosod; i > 0; i--)
1505 skip_bits(&s->gb, 8);
1508 for (i = 0; i < nb_components; i++)
1509 s->last_dc[i] = (4 << s->bits);
1512 av_assert0(s->picture_ptr == s->picture);
1513 if (CONFIG_JPEGLS_DECODER && s->ls) {
1515 // reset_ls_coding_parameters(s, 0);
1517 if ((ret = ff_jpegls_decode_picture(s, predictor,
1518 point_transform, ilv)) < 0)
1522 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1525 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1527 nb_components)) < 0)
1532 if (s->progressive && predictor) {
1533 av_assert0(s->picture_ptr == s->picture);
1534 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1536 point_transform)) < 0)
1539 if ((ret = mjpeg_decode_scan(s, nb_components,
1540 prev_shift, point_transform,
1541 mb_bitmask, mb_bitmask_size, reference)) < 0)
1546 if (s->interlaced &&
1547 get_bits_left(&s->gb) > 32 &&
1548 show_bits(&s->gb, 8) == 0xFF) {
1549 GetBitContext bak = s->gb;
1550 align_get_bits(&bak);
1551 if (show_bits(&bak, 16) == 0xFFD1) {
1552 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1554 skip_bits(&s->gb, 16);
1555 s->bottom_field ^= 1;
1564 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1565 return AVERROR_INVALIDDATA;
1568 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1570 if (get_bits(&s->gb, 16) != 4)
1571 return AVERROR_INVALIDDATA;
1572 s->restart_interval = get_bits(&s->gb, 16);
1573 s->restart_count = 0;
1574 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1575 s->restart_interval);
1580 static int mjpeg_decode_app(MJpegDecodeContext *s)
1584 len = get_bits(&s->gb, 16);
1586 return AVERROR_INVALIDDATA;
1587 if (8 * len > get_bits_left(&s->gb))
1588 return AVERROR_INVALIDDATA;
1590 id = get_bits_long(&s->gb, 32);
1593 if (s->avctx->debug & FF_DEBUG_STARTCODE) {
1595 av_get_codec_tag_string(id_str, sizeof(id_str), av_bswap32(id));
1596 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n", id_str, id, len);
1599 /* Buggy AVID, it puts EOI only at every 10th frame. */
1600 /* Also, this fourcc is used by non-avid files too, it holds some
1601 information, but it's always present in AVID-created files. */
1602 if (id == AV_RB32("AVI1")) {
1608 4bytes field_size_less_padding
1611 i = get_bits(&s->gb, 8); len--;
1612 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1614 skip_bits(&s->gb, 8);
1615 skip_bits(&s->gb, 32);
1616 skip_bits(&s->gb, 32);
1624 if (id == AV_RB32("JFIF")) {
1625 int t_w, t_h, v1, v2;
1626 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1627 v1 = get_bits(&s->gb, 8);
1628 v2 = get_bits(&s->gb, 8);
1629 skip_bits(&s->gb, 8);
1631 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1632 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1633 ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
1635 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1636 av_log(s->avctx, AV_LOG_INFO,
1637 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1639 s->avctx->sample_aspect_ratio.num,
1640 s->avctx->sample_aspect_ratio.den);
1642 t_w = get_bits(&s->gb, 8);
1643 t_h = get_bits(&s->gb, 8);
1645 /* skip thumbnail */
1646 if (len -10 - (t_w * t_h * 3) > 0)
1647 len -= t_w * t_h * 3;
1653 if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1654 skip_bits(&s->gb, 16); /* version */
1655 skip_bits(&s->gb, 16); /* flags0 */
1656 skip_bits(&s->gb, 16); /* flags1 */
1657 s->adobe_transform = get_bits(&s->gb, 8);
1658 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1659 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1664 if (id == AV_RB32("LJIF")) {
1666 int pegasus_rct = s->pegasus_rct;
1667 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1668 av_log(s->avctx, AV_LOG_INFO,
1669 "Pegasus lossless jpeg header found\n");
1670 skip_bits(&s->gb, 16); /* version ? */
1671 skip_bits(&s->gb, 16); /* unknown always 0? */
1672 skip_bits(&s->gb, 16); /* unknown always 0? */
1673 skip_bits(&s->gb, 16); /* unknown always 0? */
1674 switch (i=get_bits(&s->gb, 8)) {
1684 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1689 if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
1690 av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
1695 s->pegasus_rct = pegasus_rct;
1699 if (id == AV_RL32("colr") && len > 0) {
1700 s->colr = get_bits(&s->gb, 8);
1701 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1702 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1706 if (id == AV_RL32("xfrm") && len > 0) {
1707 s->xfrm = get_bits(&s->gb, 8);
1708 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1709 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1714 /* JPS extension by VRex */
1715 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1716 int flags, layout, type;
1717 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1718 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1720 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1721 skip_bits(&s->gb, 16); len -= 2; /* block length */
1722 skip_bits(&s->gb, 8); /* reserved */
1723 flags = get_bits(&s->gb, 8);
1724 layout = get_bits(&s->gb, 8);
1725 type = get_bits(&s->gb, 8);
1728 s->stereo3d = av_stereo3d_alloc();
1733 s->stereo3d->type = AV_STEREO3D_2D;
1734 } else if (type == 1) {
1737 s->stereo3d->type = AV_STEREO3D_LINES;
1740 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1743 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1746 if (!(flags & 0x04)) {
1747 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1754 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1755 GetByteContext gbytes;
1756 int ret, le, ifd_offset, bytes_read;
1757 const uint8_t *aligned;
1759 skip_bits(&s->gb, 16); // skip padding
1762 // init byte wise reading
1763 aligned = align_get_bits(&s->gb);
1764 bytestream2_init(&gbytes, aligned, len);
1767 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1769 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1771 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1773 // read 0th IFD and store the metadata
1774 // (return values > 0 indicate the presence of subimage metadata)
1775 ret = avpriv_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1777 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1781 bytes_read = bytestream2_tell(&gbytes);
1782 skip_bits(&s->gb, bytes_read << 3);
1789 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1790 id = get_bits_long(&s->gb, 32);
1793 if (id == AV_RB32("mjpg")) {
1795 skip_bits(&s->gb, 32); /* field size */
1796 skip_bits(&s->gb, 32); /* pad field size */
1797 skip_bits(&s->gb, 32); /* next off */
1798 skip_bits(&s->gb, 32); /* quant off */
1799 skip_bits(&s->gb, 32); /* huff off */
1800 skip_bits(&s->gb, 32); /* image off */
1801 skip_bits(&s->gb, 32); /* scan off */
1802 skip_bits(&s->gb, 32); /* data off */
1804 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1805 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1810 /* slow but needed for extreme adobe jpegs */
1812 av_log(s->avctx, AV_LOG_ERROR,
1813 "mjpeg: error, decode_app parser read over the end\n");
1815 skip_bits(&s->gb, 8);
1820 static int mjpeg_decode_com(MJpegDecodeContext *s)
1822 int len = get_bits(&s->gb, 16);
1823 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1824 char *cbuf = av_malloc(len - 1);
1827 for (i = 0; i < len - 2; i++)
1828 cbuf[i] = get_bits(&s->gb, 8);
1829 if (i > 0 && cbuf[i - 1] == '\n')
1834 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1835 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1837 /* buggy avid, it puts EOI only at every 10th frame */
1838 if (!strncmp(cbuf, "AVID", 4)) {
1839 parse_avid(s, cbuf, len);
1840 } else if (!strcmp(cbuf, "CS=ITU601"))
1842 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
1843 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1845 else if (!strcmp(cbuf, "MULTISCOPE II"))
1855 /* return the 8 bit start code value and update the search
1856 state. Return -1 if no start code found */
1857 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1859 const uint8_t *buf_ptr;
1864 buf_ptr = *pbuf_ptr;
1865 while (buf_end - buf_ptr > 1) {
1868 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1877 ff_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1878 *pbuf_ptr = buf_ptr;
1882 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1883 const uint8_t **buf_ptr, const uint8_t *buf_end,
1884 const uint8_t **unescaped_buf_ptr,
1885 int *unescaped_buf_size)
1888 start_code = find_marker(buf_ptr, buf_end);
1890 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1892 return AVERROR(ENOMEM);
1894 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1895 if (start_code == SOS && !s->ls) {
1896 const uint8_t *src = *buf_ptr;
1897 uint8_t *dst = s->buffer;
1899 while (src < buf_end) {
1900 uint8_t x = *(src++);
1903 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1905 while (src < buf_end && x == 0xff)
1908 if (x >= 0xd0 && x <= 0xd7)
1915 *unescaped_buf_ptr = s->buffer;
1916 *unescaped_buf_size = dst - s->buffer;
1917 memset(s->buffer + *unescaped_buf_size, 0,
1918 AV_INPUT_BUFFER_PADDING_SIZE);
1920 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
1921 (buf_end - *buf_ptr) - (dst - s->buffer));
1922 } else if (start_code == SOS && s->ls) {
1923 const uint8_t *src = *buf_ptr;
1924 uint8_t *dst = s->buffer;
1930 while (src + t < buf_end) {
1931 uint8_t x = src[t++];
1933 while ((src + t < buf_end) && x == 0xff)
1942 init_put_bits(&pb, dst, t);
1944 /* unescape bitstream */
1946 uint8_t x = src[b++];
1947 put_bits(&pb, 8, x);
1951 av_log(s->avctx, AV_LOG_WARNING, "Invalid escape sequence\n");
1954 put_bits(&pb, 7, x);
1958 flush_put_bits(&pb);
1960 *unescaped_buf_ptr = dst;
1961 *unescaped_buf_size = (bit_count + 7) >> 3;
1962 memset(s->buffer + *unescaped_buf_size, 0,
1963 AV_INPUT_BUFFER_PADDING_SIZE);
1965 *unescaped_buf_ptr = *buf_ptr;
1966 *unescaped_buf_size = buf_end - *buf_ptr;
1972 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1975 AVFrame *frame = data;
1976 const uint8_t *buf = avpkt->data;
1977 int buf_size = avpkt->size;
1978 MJpegDecodeContext *s = avctx->priv_data;
1979 const uint8_t *buf_end, *buf_ptr;
1980 const uint8_t *unescaped_buf_ptr;
1982 int unescaped_buf_size;
1988 av_dict_free(&s->exif_metadata);
1989 av_freep(&s->stereo3d);
1990 s->adobe_transform = -1;
1993 buf_end = buf + buf_size;
1994 while (buf_ptr < buf_end) {
1995 /* find start next marker */
1996 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1998 &unescaped_buf_size);
2000 if (start_code < 0) {
2002 } else if (unescaped_buf_size > INT_MAX / 8) {
2003 av_log(avctx, AV_LOG_ERROR,
2004 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
2005 start_code, unescaped_buf_size, buf_size);
2006 return AVERROR_INVALIDDATA;
2008 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
2009 start_code, buf_end - buf_ptr);
2011 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
2014 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
2018 s->start_code = start_code;
2019 if (s->avctx->debug & FF_DEBUG_STARTCODE)
2020 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
2022 /* process markers */
2023 if (start_code >= 0xd0 && start_code <= 0xd7)
2024 av_log(avctx, AV_LOG_DEBUG,
2025 "restart marker: %d\n", start_code & 0x0f);
2027 else if (start_code >= APP0 && start_code <= APP15)
2028 mjpeg_decode_app(s);
2030 else if (start_code == COM)
2031 mjpeg_decode_com(s);
2035 if (!CONFIG_JPEGLS_DECODER &&
2036 (start_code == SOF48 || start_code == LSE)) {
2037 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
2038 return AVERROR(ENOSYS);
2041 switch (start_code) {
2043 s->restart_interval = 0;
2044 s->restart_count = 0;
2045 /* nothing to do on SOI */
2048 ff_mjpeg_decode_dqt(s);
2051 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
2052 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
2061 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2068 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2072 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2076 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2080 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2084 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2088 if (!CONFIG_JPEGLS_DECODER ||
2089 (ret = ff_jpegls_decode_lse(s)) < 0)
2095 if (!s->got_picture) {
2096 av_log(avctx, AV_LOG_WARNING,
2097 "Found EOI before any SOF, ignoring\n");
2100 if (s->interlaced) {
2101 s->bottom_field ^= 1;
2102 /* if not bottom field, do not output image yet */
2103 if (s->bottom_field == !s->interlace_polarity)
2106 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2112 int qp = FFMAX3(s->qscale[0],
2115 int qpw = (s->width + 15) / 16;
2116 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2118 memset(qp_table_buf->data, qp, qpw);
2119 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2122 if(avctx->debug & FF_DEBUG_QP)
2123 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2129 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2130 (avctx->err_recognition & AV_EF_EXPLODE))
2134 mjpeg_decode_dri(s);
2146 av_log(avctx, AV_LOG_ERROR,
2147 "mjpeg: unsupported coding type (%x)\n", start_code);
2151 /* eof process start code */
2152 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2153 av_log(avctx, AV_LOG_DEBUG,
2154 "marker parser used %d bytes (%d bits)\n",
2155 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2157 if (s->got_picture && s->cur_scan) {
2158 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2161 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2162 return AVERROR_INVALIDDATA;
2168 is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step > 1;
2170 if (AV_RB32(s->upscale_h)) {
2172 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2173 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2174 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2175 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2176 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2177 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2178 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2179 avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2180 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2181 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2182 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2183 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2185 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2186 for (p = 0; p<4; p++) {
2187 uint8_t *line = s->picture_ptr->data[p];
2190 if (!s->upscale_h[p])
2193 w = FF_CEIL_RSHIFT(w, hshift);
2194 h = FF_CEIL_RSHIFT(h, vshift);
2196 if (s->upscale_v[p])
2199 for (i = 0; i < h; i++) {
2200 if (s->upscale_h[p] == 1) {
2201 if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2202 else line[w - 1] = line[(w - 1) / 2];
2203 for (index = w - 2; index > 0; index--) {
2205 ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2207 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2209 } else if (s->upscale_h[p] == 2) {
2211 ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 3];
2213 ((uint16_t*)line)[w - 2] = ((uint16_t*)line)[w - 1];
2215 line[w - 1] = line[(w - 1) / 3];
2217 line[w - 2] = line[w - 1];
2219 for (index = w - 3; index > 0; index--) {
2220 line[index] = (line[index / 3] + line[(index + 1) / 3] + line[(index + 2) / 3] + 1) / 3;
2223 line += s->linesize[p];
2227 if (AV_RB32(s->upscale_v)) {
2229 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2230 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2231 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2232 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2233 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2234 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2235 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2236 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2237 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2238 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2239 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2240 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2241 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2243 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2244 for (p = 0; p < 4; p++) {
2248 if (!s->upscale_v[p])
2251 w = FF_CEIL_RSHIFT(w, hshift);
2252 h = FF_CEIL_RSHIFT(h, vshift);
2254 dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2255 for (i = h - 1; i; i--) {
2256 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2257 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2258 if (src1 == src2 || i == h - 1) {
2259 memcpy(dst, src1, w);
2261 for (index = 0; index < w; index++)
2262 dst[index] = (src1[index] + src2[index]) >> 1;
2264 dst -= s->linesize[p];
2270 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2271 for (index=0; index<4; index++) {
2272 uint8_t *dst = s->picture_ptr->data[index];
2273 int w = s->picture_ptr->width;
2274 int h = s->picture_ptr->height;
2275 if(index && index<3){
2276 w = FF_CEIL_RSHIFT(w, hshift);
2277 h = FF_CEIL_RSHIFT(h, vshift);
2280 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2281 for (i=0; i<h/2; i++) {
2283 FFSWAP(int, dst[j], dst2[j]);
2284 dst += s->picture_ptr->linesize[index];
2285 dst2 -= s->picture_ptr->linesize[index];
2290 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2291 int w = s->picture_ptr->width;
2292 int h = s->picture_ptr->height;
2293 for (i=0; i<h; i++) {
2296 for (index=0; index<4; index++) {
2297 dst[index] = s->picture_ptr->data[index]
2298 + s->picture_ptr->linesize[index]*i;
2300 for (j=0; j<w; j++) {
2302 int r = dst[0][j] * k;
2303 int g = dst[1][j] * k;
2304 int b = dst[2][j] * k;
2305 dst[0][j] = g*257 >> 16;
2306 dst[1][j] = b*257 >> 16;
2307 dst[2][j] = r*257 >> 16;
2312 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2313 int w = s->picture_ptr->width;
2314 int h = s->picture_ptr->height;
2315 for (i=0; i<h; i++) {
2318 for (index=0; index<4; index++) {
2319 dst[index] = s->picture_ptr->data[index]
2320 + s->picture_ptr->linesize[index]*i;
2322 for (j=0; j<w; j++) {
2324 int r = (255 - dst[0][j]) * k;
2325 int g = (128 - dst[1][j]) * k;
2326 int b = (128 - dst[2][j]) * k;
2327 dst[0][j] = r*257 >> 16;
2328 dst[1][j] = (g*257 >> 16) + 128;
2329 dst[2][j] = (b*257 >> 16) + 128;
2336 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2338 stereo->type = s->stereo3d->type;
2339 stereo->flags = s->stereo3d->flags;
2341 av_freep(&s->stereo3d);
2344 av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
2345 av_dict_free(&s->exif_metadata);
2347 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2349 // return buf_end - buf_ptr;
2350 return buf_ptr - buf;
2353 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2355 MJpegDecodeContext *s = avctx->priv_data;
2358 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2359 av_log(avctx, AV_LOG_INFO, "Single field\n");
2363 av_frame_free(&s->picture);
2364 s->picture_ptr = NULL;
2365 } else if (s->picture_ptr)
2366 av_frame_unref(s->picture_ptr);
2368 av_freep(&s->buffer);
2369 av_freep(&s->stereo3d);
2370 av_freep(&s->ljpeg_buffer);
2371 s->ljpeg_buffer_size = 0;
2373 for (i = 0; i < 3; i++) {
2374 for (j = 0; j < 4; j++)
2375 ff_free_vlc(&s->vlcs[i][j]);
2377 for (i = 0; i < MAX_COMPONENTS; i++) {
2378 av_freep(&s->blocks[i]);
2379 av_freep(&s->last_nnz[i]);
2381 av_dict_free(&s->exif_metadata);
2385 static void decode_flush(AVCodecContext *avctx)
2387 MJpegDecodeContext *s = avctx->priv_data;
2391 #if CONFIG_MJPEG_DECODER
2392 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2393 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2394 static const AVOption options[] = {
2395 { "extern_huff", "Use external huffman table.",
2396 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
2400 static const AVClass mjpegdec_class = {
2401 .class_name = "MJPEG decoder",
2402 .item_name = av_default_item_name,
2404 .version = LIBAVUTIL_VERSION_INT,
2407 AVCodec ff_mjpeg_decoder = {
2409 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2410 .type = AVMEDIA_TYPE_VIDEO,
2411 .id = AV_CODEC_ID_MJPEG,
2412 .priv_data_size = sizeof(MJpegDecodeContext),
2413 .init = ff_mjpeg_decode_init,
2414 .close = ff_mjpeg_decode_end,
2415 .decode = ff_mjpeg_decode_frame,
2416 .flush = decode_flush,
2417 .capabilities = AV_CODEC_CAP_DR1,
2419 .priv_class = &mjpegdec_class,
2420 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
2423 #if CONFIG_THP_DECODER
2424 AVCodec ff_thp_decoder = {
2426 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2427 .type = AVMEDIA_TYPE_VIDEO,
2428 .id = AV_CODEC_ID_THP,
2429 .priv_data_size = sizeof(MJpegDecodeContext),
2430 .init = ff_mjpeg_decode_init,
2431 .close = ff_mjpeg_decode_end,
2432 .decode = ff_mjpeg_decode_frame,
2433 .flush = decode_flush,
2434 .capabilities = AV_CODEC_CAP_DR1,
2436 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,