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 if (s->avctx->codec_id == AV_CODEC_ID_AMV && (height&15))
292 avpriv_request_sample(s->avctx, "non mod 16 height AMV");
294 // HACK for odd_height.mov
295 if (s->interlaced && s->width == width && s->height == height + 1)
298 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
299 if (av_image_check_size(width, height, 0, s->avctx))
300 return AVERROR_INVALIDDATA;
302 nb_components = get_bits(&s->gb, 8);
303 if (nb_components <= 0 ||
304 nb_components > MAX_COMPONENTS)
306 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
307 if (nb_components != s->nb_components) {
308 av_log(s->avctx, AV_LOG_ERROR,
309 "nb_components changing in interlaced picture\n");
310 return AVERROR_INVALIDDATA;
313 if (s->ls && !(bits <= 8 || nb_components == 1)) {
314 avpriv_report_missing_feature(s->avctx,
315 "JPEG-LS that is not <= 8 "
316 "bits/component or 16-bit gray");
317 return AVERROR_PATCHWELCOME;
319 s->nb_components = nb_components;
322 for (i = 0; i < nb_components; i++) {
324 s->component_id[i] = get_bits(&s->gb, 8) - 1;
325 h_count[i] = get_bits(&s->gb, 4);
326 v_count[i] = get_bits(&s->gb, 4);
327 /* compute hmax and vmax (only used in interleaved case) */
328 if (h_count[i] > s->h_max)
329 s->h_max = h_count[i];
330 if (v_count[i] > s->v_max)
331 s->v_max = v_count[i];
332 s->quant_index[i] = get_bits(&s->gb, 8);
333 if (s->quant_index[i] >= 4) {
334 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
335 return AVERROR_INVALIDDATA;
337 if (!h_count[i] || !v_count[i]) {
338 av_log(s->avctx, AV_LOG_ERROR,
339 "Invalid sampling factor in component %d %d:%d\n",
340 i, h_count[i], v_count[i]);
341 return AVERROR_INVALIDDATA;
344 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
345 i, h_count[i], v_count[i],
346 s->component_id[i], s->quant_index[i]);
348 if ( nb_components == 4
349 && s->component_id[0] == 'C' - 1
350 && s->component_id[1] == 'M' - 1
351 && s->component_id[2] == 'Y' - 1
352 && s->component_id[3] == 'K' - 1)
353 s->adobe_transform = 0;
355 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
356 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
357 return AVERROR_PATCHWELCOME;
361 /* if different size, realloc/alloc picture */
362 if (width != s->width || height != s->height || bits != s->bits ||
363 memcmp(s->h_count, h_count, sizeof(h_count)) ||
364 memcmp(s->v_count, v_count, sizeof(v_count))) {
369 memcpy(s->h_count, h_count, sizeof(h_count));
370 memcpy(s->v_count, v_count, sizeof(v_count));
374 /* test interlaced mode */
375 if (s->first_picture &&
376 (s->multiscope != 2 || s->avctx->time_base.den >= 25 * s->avctx->time_base.num) &&
377 s->org_height != 0 &&
378 s->height < ((s->org_height * 3) / 4)) {
380 s->bottom_field = s->interlace_polarity;
381 s->picture_ptr->interlaced_frame = 1;
382 s->picture_ptr->top_field_first = !s->interlace_polarity;
386 ret = ff_set_dimensions(s->avctx, width, height);
390 s->first_picture = 0;
393 if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
394 if (s->progressive) {
395 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
396 return AVERROR_INVALIDDATA;
399 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
401 else if (!s->lossless)
403 /* XXX: not complete test ! */
404 pix_fmt_id = ((unsigned)s->h_count[0] << 28) | (s->v_count[0] << 24) |
405 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
406 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
407 (s->h_count[3] << 4) | s->v_count[3];
408 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
409 /* NOTE we do not allocate pictures large enough for the possible
410 * padding of h/v_count being 4 */
411 if (!(pix_fmt_id & 0xD0D0D0D0))
412 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
413 if (!(pix_fmt_id & 0x0D0D0D0D))
414 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
416 for (i = 0; i < 8; i++) {
417 int j = 6 + (i&1) - (i&6);
418 int is = (pix_fmt_id >> (4*i)) & 0xF;
419 int js = (pix_fmt_id >> (4*j)) & 0xF;
421 if (is == 1 && js != 2 && (i < 2 || i > 5))
422 js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
423 if (is == 1 && js != 2 && (i < 2 || i > 5))
424 js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
426 if (is == 1 && js == 2) {
427 if (i & 1) s->upscale_h[j/2] = 1;
428 else s->upscale_v[j/2] = 1;
432 switch (pix_fmt_id) {
435 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
437 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
438 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
440 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
441 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
442 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
445 av_assert0(s->nb_components == 3);
449 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
451 if (s->adobe_transform == 0 && s->bits <= 8) {
452 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
454 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
455 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
458 av_assert0(s->nb_components == 4);
462 if (s->adobe_transform == 0 && s->bits <= 8) {
463 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
464 s->upscale_v[1] = s->upscale_v[2] = 1;
465 s->upscale_h[1] = s->upscale_h[2] = 1;
466 } else if (s->adobe_transform == 2 && s->bits <= 8) {
467 s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
468 s->upscale_v[1] = s->upscale_v[2] = 1;
469 s->upscale_h[1] = s->upscale_h[2] = 1;
470 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
472 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
473 else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
474 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
476 av_assert0(s->nb_components == 4);
482 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
485 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
490 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
493 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
505 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
507 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
514 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
515 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
518 s->upscale_v[0] = s->upscale_v[1] = 1;
520 if (pix_fmt_id == 0x14111100)
521 s->upscale_v[1] = s->upscale_v[2] = 1;
522 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
525 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
529 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
530 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
533 s->upscale_h[0] = s->upscale_h[1] = 1;
535 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
536 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
537 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
543 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
544 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
545 s->upscale_h[1] = s->upscale_h[2] = 2;
549 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
552 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
557 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
558 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
559 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
560 if (pix_fmt_id == 0x42111100) {
563 s->upscale_h[1] = s->upscale_h[2] = 1;
564 } else if (pix_fmt_id == 0x24111100) {
567 s->upscale_v[1] = s->upscale_v[2] = 1;
571 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
574 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
578 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x bits:%d\n", pix_fmt_id, s->bits);
579 memset(s->upscale_h, 0, sizeof(s->upscale_h));
580 memset(s->upscale_v, 0, sizeof(s->upscale_v));
581 return AVERROR_PATCHWELCOME;
583 if ((AV_RB32(s->upscale_h) || AV_RB32(s->upscale_v)) && s->avctx->lowres) {
584 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
585 return AVERROR_PATCHWELCOME;
588 memset(s->upscale_h, 0, sizeof(s->upscale_h));
589 memset(s->upscale_v, 0, sizeof(s->upscale_v));
590 if (s->nb_components == 3) {
591 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
592 } else if (s->nb_components != 1) {
593 av_log(s->avctx, AV_LOG_ERROR, "Unsupported number of components %d\n", s->nb_components);
594 return AVERROR_PATCHWELCOME;
595 } else if (s->palette_index && s->bits <= 8)
596 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
597 else if (s->bits <= 8)
598 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
600 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
603 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
605 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
609 av_frame_unref(s->picture_ptr);
610 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
612 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
613 s->picture_ptr->key_frame = 1;
616 for (i = 0; i < 4; i++)
617 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
619 ff_dlog(s->avctx, "%d %d %d %d %d %d\n",
620 s->width, s->height, s->linesize[0], s->linesize[1],
621 s->interlaced, s->avctx->height);
623 if (len != (8 + (3 * nb_components)))
624 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
627 if (s->rgb && !s->lossless && !s->ls) {
628 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
629 return AVERROR_PATCHWELCOME;
632 /* totally blank picture as progressive JPEG will only add details to it */
633 if (s->progressive) {
634 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
635 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
636 for (i = 0; i < s->nb_components; i++) {
637 int size = bw * bh * s->h_count[i] * s->v_count[i];
638 av_freep(&s->blocks[i]);
639 av_freep(&s->last_nnz[i]);
640 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
641 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
642 if (!s->blocks[i] || !s->last_nnz[i])
643 return AVERROR(ENOMEM);
644 s->block_stride[i] = bw * s->h_count[i];
646 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
651 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
654 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
655 if (code < 0 || code > 16) {
656 av_log(s->avctx, AV_LOG_WARNING,
657 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
658 0, dc_index, &s->vlcs[0][dc_index]);
663 return get_xbits(&s->gb, code);
668 /* decode block and dequantize */
669 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
670 int dc_index, int ac_index, int16_t *quant_matrix)
672 int code, i, j, level, val;
675 val = mjpeg_decode_dc(s, dc_index);
676 if (val == 0xfffff) {
677 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
678 return AVERROR_INVALIDDATA;
680 val = val * quant_matrix[0] + s->last_dc[component];
681 val = FFMIN(val, 32767);
682 s->last_dc[component] = val;
686 {OPEN_READER(re, &s->gb);
688 UPDATE_CACHE(re, &s->gb);
689 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
691 i += ((unsigned)code) >> 4;
694 if (code > MIN_CACHE_BITS - 16)
695 UPDATE_CACHE(re, &s->gb);
698 int cache = GET_CACHE(re, &s->gb);
699 int sign = (~cache) >> 31;
700 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
703 LAST_SKIP_BITS(re, &s->gb, code);
706 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
707 return AVERROR_INVALIDDATA;
709 j = s->scantable.permutated[i];
710 block[j] = level * quant_matrix[j];
713 CLOSE_READER(re, &s->gb);}
718 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
719 int component, int dc_index,
720 int16_t *quant_matrix, int Al)
723 s->bdsp.clear_block(block);
724 val = mjpeg_decode_dc(s, dc_index);
725 if (val == 0xfffff) {
726 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
727 return AVERROR_INVALIDDATA;
729 val = (val * (quant_matrix[0] << Al)) + s->last_dc[component];
730 s->last_dc[component] = val;
735 /* decode block and dequantize - progressive JPEG version */
736 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
737 uint8_t *last_nnz, int ac_index,
738 int16_t *quant_matrix,
739 int ss, int se, int Al, int *EOBRUN)
741 int code, i, j, level, val, run;
749 OPEN_READER(re, &s->gb);
750 for (i = ss; ; i++) {
751 UPDATE_CACHE(re, &s->gb);
752 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
754 run = ((unsigned) code) >> 4;
758 if (code > MIN_CACHE_BITS - 16)
759 UPDATE_CACHE(re, &s->gb);
762 int cache = GET_CACHE(re, &s->gb);
763 int sign = (~cache) >> 31;
764 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
767 LAST_SKIP_BITS(re, &s->gb, code);
771 j = s->scantable.permutated[se];
772 block[j] = level * (quant_matrix[j] << Al);
775 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
776 return AVERROR_INVALIDDATA;
778 j = s->scantable.permutated[i];
779 block[j] = level * (quant_matrix[j] << Al);
781 if (run == 0xF) {// ZRL - skip 15 coefficients
784 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
785 return AVERROR_INVALIDDATA;
790 UPDATE_CACHE(re, &s->gb);
791 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
792 LAST_SKIP_BITS(re, &s->gb, run);
799 CLOSE_READER(re, &s->gb);
808 #define REFINE_BIT(j) { \
809 UPDATE_CACHE(re, &s->gb); \
810 sign = block[j] >> 15; \
811 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
812 ((quant_matrix[j] ^ sign) - sign) << Al; \
813 LAST_SKIP_BITS(re, &s->gb, 1); \
821 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
826 j = s->scantable.permutated[i]; \
829 else if (run-- == 0) \
833 /* decode block and dequantize - progressive JPEG refinement pass */
834 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
836 int ac_index, int16_t *quant_matrix,
837 int ss, int se, int Al, int *EOBRUN)
839 int code, i = ss, j, sign, val, run;
840 int last = FFMIN(se, *last_nnz);
842 OPEN_READER(re, &s->gb);
847 UPDATE_CACHE(re, &s->gb);
848 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
851 run = ((unsigned) code) >> 4;
852 UPDATE_CACHE(re, &s->gb);
853 val = SHOW_UBITS(re, &s->gb, 1);
854 LAST_SKIP_BITS(re, &s->gb, 1);
856 j = s->scantable.permutated[i];
858 block[j] = ((quant_matrix[j] << Al) ^ val) - val;
862 CLOSE_READER(re, &s->gb);
866 run = ((unsigned) code) >> 4;
873 UPDATE_CACHE(re, &s->gb);
874 run += SHOW_UBITS(re, &s->gb, val);
875 LAST_SKIP_BITS(re, &s->gb, val);
887 for (; i <= last; i++) {
888 j = s->scantable.permutated[i];
892 CLOSE_READER(re, &s->gb);
899 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
904 if (s->restart_interval) {
906 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
907 align_get_bits(&s->gb);
908 for (i = 0; i < nb_components; i++) /* reset dc */
909 s->last_dc[i] = (4 << s->bits);
912 i = 8 + ((-get_bits_count(&s->gb)) & 7);
914 if (s->restart_count == 0) {
915 if( show_bits(&s->gb, i) == (1 << i) - 1
916 || show_bits(&s->gb, i) == 0xFF) {
917 int pos = get_bits_count(&s->gb);
918 align_get_bits(&s->gb);
919 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
920 skip_bits(&s->gb, 8);
921 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
922 for (i = 0; i < nb_components; i++) /* reset dc */
923 s->last_dc[i] = (4 << s->bits);
926 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
933 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
936 uint16_t (*buffer)[4];
937 int left[4], top[4], topleft[4];
938 const int linesize = s->linesize[0];
939 const int mask = ((1 << s->bits) - 1) << point_transform;
943 if (s->nb_components != 3 && s->nb_components != 4)
944 return AVERROR_INVALIDDATA;
945 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
946 return AVERROR_INVALIDDATA;
949 s->restart_count = s->restart_interval;
951 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
952 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
953 buffer = s->ljpeg_buffer;
955 for (i = 0; i < 4; i++)
956 buffer[0][i] = 1 << (s->bits - 1);
958 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
959 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
961 if (s->interlaced && s->bottom_field)
962 ptr += linesize >> 1;
964 for (i = 0; i < 4; i++)
965 top[i] = left[i] = topleft[i] = buffer[0][i];
967 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
968 int modified_predictor = predictor;
970 if (s->restart_interval && !s->restart_count){
971 s->restart_count = s->restart_interval;
975 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
977 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
978 modified_predictor = 1;
980 for (i=0;i<nb_components;i++) {
984 top[i] = buffer[mb_x][i];
986 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
988 dc = mjpeg_decode_dc(s, s->dc_index[i]);
992 left[i] = buffer[mb_x][i] =
993 mask & (pred + (dc << point_transform));
996 if (s->restart_interval && !--s->restart_count) {
997 align_get_bits(&s->gb);
998 skip_bits(&s->gb, 16); /* skip RSTn */
1001 if (s->nb_components == 4) {
1002 for(i=0; i<nb_components; i++) {
1003 int c= s->comp_index[i];
1005 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1006 ptr[4*mb_x+3-c] = buffer[mb_x][i];
1008 } else if(s->bits == 9) {
1009 return AVERROR_PATCHWELCOME;
1011 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1012 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
1016 } else if (s->rct) {
1017 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1018 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1019 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1020 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1022 } else if (s->pegasus_rct) {
1023 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1024 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
1025 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1026 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1029 for(i=0; i<nb_components; i++) {
1030 int c= s->comp_index[i];
1032 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1033 ptr[3*mb_x+2-c] = buffer[mb_x][i];
1035 } else if(s->bits == 9) {
1036 return AVERROR_PATCHWELCOME;
1038 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1039 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
1048 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1049 int point_transform, int nb_components)
1051 int i, mb_x, mb_y, mask;
1052 int bits= (s->bits+7)&~7;
1053 int resync_mb_y = 0;
1054 int resync_mb_x = 0;
1056 point_transform += bits - s->bits;
1057 mask = ((1 << s->bits) - 1) << point_transform;
1059 av_assert0(nb_components>=1 && nb_components<=4);
1061 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1062 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1063 if (s->restart_interval && !s->restart_count){
1064 s->restart_count = s->restart_interval;
1069 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1070 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1071 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1072 for (i = 0; i < nb_components; i++) {
1075 int n, h, v, x, y, c, j, linesize;
1076 n = s->nb_blocks[i];
1077 c = s->comp_index[i];
1082 linesize= s->linesize[c];
1084 if(bits>8) linesize /= 2;
1086 for(j=0; j<n; j++) {
1089 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1093 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1095 if(x==0 && leftcol){
1096 pred= 1 << (bits - 1);
1101 if(x==0 && leftcol){
1102 pred= ptr[-linesize];
1104 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1108 if (s->interlaced && s->bottom_field)
1109 ptr += linesize >> 1;
1111 *ptr= pred + (dc << point_transform);
1113 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1115 if(x==0 && leftcol){
1116 pred= 1 << (bits - 1);
1121 if(x==0 && leftcol){
1122 pred= ptr16[-linesize];
1124 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1128 if (s->interlaced && s->bottom_field)
1129 ptr16 += linesize >> 1;
1131 *ptr16= pred + (dc << point_transform);
1140 for (i = 0; i < nb_components; i++) {
1143 int n, h, v, x, y, c, j, linesize, dc;
1144 n = s->nb_blocks[i];
1145 c = s->comp_index[i];
1150 linesize = s->linesize[c];
1152 if(bits>8) linesize /= 2;
1154 for (j = 0; j < n; j++) {
1157 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1161 ptr = s->picture_ptr->data[c] +
1162 (linesize * (v * mb_y + y)) +
1163 (h * mb_x + x); //FIXME optimize this crap
1164 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1167 *ptr = pred + (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
1170 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1173 *ptr16= pred + (dc << point_transform);
1183 if (s->restart_interval && !--s->restart_count) {
1184 align_get_bits(&s->gb);
1185 skip_bits(&s->gb, 16); /* skip RSTn */
1192 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1193 uint8_t *dst, const uint8_t *src,
1194 int linesize, int lowres)
1197 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1199 case 1: copy_block4(dst, src, linesize, linesize, 4);
1201 case 2: copy_block2(dst, src, linesize, linesize, 2);
1203 case 3: *dst = *src;
1208 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1210 int block_x, block_y;
1211 int size = 8 >> s->avctx->lowres;
1213 for (block_y=0; block_y<size; block_y++)
1214 for (block_x=0; block_x<size; block_x++)
1215 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1217 for (block_y=0; block_y<size; block_y++)
1218 for (block_x=0; block_x<size; block_x++)
1219 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1223 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1224 int Al, const uint8_t *mb_bitmask,
1225 int mb_bitmask_size,
1226 const AVFrame *reference)
1229 uint8_t *data[MAX_COMPONENTS];
1230 const uint8_t *reference_data[MAX_COMPONENTS];
1231 int linesize[MAX_COMPONENTS];
1232 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1233 int bytes_per_pixel = 1 + (s->bits > 8);
1236 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1237 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1238 return AVERROR_INVALIDDATA;
1240 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1243 s->restart_count = 0;
1245 for (i = 0; i < nb_components; i++) {
1246 int c = s->comp_index[i];
1247 data[c] = s->picture_ptr->data[c];
1248 reference_data[c] = reference ? reference->data[c] : NULL;
1249 linesize[c] = s->linesize[c];
1250 s->coefs_finished[c] |= 1;
1253 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1254 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1255 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1257 if (s->restart_interval && !s->restart_count)
1258 s->restart_count = s->restart_interval;
1260 if (get_bits_left(&s->gb) < 0) {
1261 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1262 -get_bits_left(&s->gb));
1263 return AVERROR_INVALIDDATA;
1265 for (i = 0; i < nb_components; i++) {
1267 int n, h, v, x, y, c, j;
1269 n = s->nb_blocks[i];
1270 c = s->comp_index[i];
1275 for (j = 0; j < n; j++) {
1276 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1277 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1279 if (s->interlaced && s->bottom_field)
1280 block_offset += linesize[c] >> 1;
1281 if ( 8*(h * mb_x + x) < s->width
1282 && 8*(v * mb_y + y) < s->height) {
1283 ptr = data[c] + block_offset;
1286 if (!s->progressive) {
1289 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1290 linesize[c], s->avctx->lowres);
1293 s->bdsp.clear_block(s->block);
1294 if (decode_block(s, s->block, i,
1295 s->dc_index[i], s->ac_index[i],
1296 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1297 av_log(s->avctx, AV_LOG_ERROR,
1298 "error y=%d x=%d\n", mb_y, mb_x);
1299 return AVERROR_INVALIDDATA;
1302 s->idsp.idct_put(ptr, linesize[c], s->block);
1304 shift_output(s, ptr, linesize[c]);
1308 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1310 int16_t *block = s->blocks[c][block_idx];
1312 block[0] += get_bits1(&s->gb) *
1313 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1314 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1315 s->quant_matrixes[s->quant_sindex[i]],
1317 av_log(s->avctx, AV_LOG_ERROR,
1318 "error y=%d x=%d\n", mb_y, mb_x);
1319 return AVERROR_INVALIDDATA;
1322 ff_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1323 ff_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1324 mb_x, mb_y, x, y, c, s->bottom_field,
1325 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1333 handle_rstn(s, nb_components);
1339 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1340 int se, int Ah, int Al)
1344 int c = s->comp_index[0];
1345 uint8_t *data = s->picture_ptr->data[c];
1346 int linesize = s->linesize[c];
1348 int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1349 int bytes_per_pixel = 1 + (s->bits > 8);
1351 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1352 if (se < ss || se > 63) {
1353 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1354 return AVERROR_INVALIDDATA;
1358 // s->coefs_finished is a bitmask for coefficients coded
1359 // ss and se are parameters telling start and end coefficients
1360 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1361 last_scan = !~s->coefs_finished[c];
1364 if (s->interlaced && s->bottom_field)
1365 data += linesize >> 1;
1367 s->restart_count = 0;
1369 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1370 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1371 int block_idx = mb_y * s->block_stride[c];
1372 int16_t (*block)[64] = &s->blocks[c][block_idx];
1373 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1374 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1376 if (s->restart_interval && !s->restart_count)
1377 s->restart_count = s->restart_interval;
1380 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1381 quant_matrix, ss, se, Al, &EOBRUN);
1383 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1384 quant_matrix, ss, se, Al, &EOBRUN);
1386 av_log(s->avctx, AV_LOG_ERROR,
1387 "error y=%d x=%d\n", mb_y, mb_x);
1388 return AVERROR_INVALIDDATA;
1392 s->idsp.idct_put(ptr, linesize, *block);
1394 shift_output(s, ptr, linesize);
1395 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1397 if (handle_rstn(s, 0))
1404 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1405 int mb_bitmask_size, const AVFrame *reference)
1407 int len, nb_components, i, h, v, predictor, point_transform;
1409 const int block_size = s->lossless ? 1 : 8;
1410 int ilv, prev_shift;
1412 if (!s->got_picture) {
1413 av_log(s->avctx, AV_LOG_WARNING,
1414 "Can not process SOS before SOF, skipping\n");
1418 av_assert0(s->picture_ptr->data[0]);
1419 /* XXX: verify len field validity */
1420 len = get_bits(&s->gb, 16);
1421 nb_components = get_bits(&s->gb, 8);
1422 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1423 av_log(s->avctx, AV_LOG_ERROR,
1424 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1425 return AVERROR_PATCHWELCOME;
1427 if (len != 6 + 2 * nb_components) {
1428 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1429 return AVERROR_INVALIDDATA;
1431 for (i = 0; i < nb_components; i++) {
1432 id = get_bits(&s->gb, 8) - 1;
1433 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1434 /* find component index */
1435 for (index = 0; index < s->nb_components; index++)
1436 if (id == s->component_id[index])
1438 if (index == s->nb_components) {
1439 av_log(s->avctx, AV_LOG_ERROR,
1440 "decode_sos: index(%d) out of components\n", index);
1441 return AVERROR_INVALIDDATA;
1443 /* Metasoft MJPEG codec has Cb and Cr swapped */
1444 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1445 && nb_components == 3 && s->nb_components == 3 && i)
1448 s->quant_sindex[i] = s->quant_index[index];
1449 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1450 s->h_scount[i] = s->h_count[index];
1451 s->v_scount[i] = s->v_count[index];
1453 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1455 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1456 index = (index+2)%3;
1458 s->comp_index[i] = index;
1460 s->dc_index[i] = get_bits(&s->gb, 4);
1461 s->ac_index[i] = get_bits(&s->gb, 4);
1463 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1464 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1466 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))
1470 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1471 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1472 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1473 prev_shift = get_bits(&s->gb, 4); /* Ah */
1474 point_transform = get_bits(&s->gb, 4); /* Al */
1476 prev_shift = point_transform = 0;
1478 if (nb_components > 1) {
1479 /* interleaved stream */
1480 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1481 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1482 } else if (!s->ls) { /* skip this for JPEG-LS */
1483 h = s->h_max / s->h_scount[0];
1484 v = s->v_max / s->v_scount[0];
1485 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1486 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1487 s->nb_blocks[0] = 1;
1492 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1493 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1494 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1495 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1496 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1499 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1500 for (i = s->mjpb_skiptosod; i > 0; i--)
1501 skip_bits(&s->gb, 8);
1504 for (i = 0; i < nb_components; i++)
1505 s->last_dc[i] = (4 << s->bits);
1508 av_assert0(s->picture_ptr == s->picture);
1509 if (CONFIG_JPEGLS_DECODER && s->ls) {
1511 // reset_ls_coding_parameters(s, 0);
1513 if ((ret = ff_jpegls_decode_picture(s, predictor,
1514 point_transform, ilv)) < 0)
1518 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1521 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1523 nb_components)) < 0)
1528 if (s->progressive && predictor) {
1529 av_assert0(s->picture_ptr == s->picture);
1530 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1532 point_transform)) < 0)
1535 if ((ret = mjpeg_decode_scan(s, nb_components,
1536 prev_shift, point_transform,
1537 mb_bitmask, mb_bitmask_size, reference)) < 0)
1542 if (s->interlaced &&
1543 get_bits_left(&s->gb) > 32 &&
1544 show_bits(&s->gb, 8) == 0xFF) {
1545 GetBitContext bak = s->gb;
1546 align_get_bits(&bak);
1547 if (show_bits(&bak, 16) == 0xFFD1) {
1548 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1550 skip_bits(&s->gb, 16);
1551 s->bottom_field ^= 1;
1560 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1561 return AVERROR_INVALIDDATA;
1564 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1566 if (get_bits(&s->gb, 16) != 4)
1567 return AVERROR_INVALIDDATA;
1568 s->restart_interval = get_bits(&s->gb, 16);
1569 s->restart_count = 0;
1570 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1571 s->restart_interval);
1576 static int mjpeg_decode_app(MJpegDecodeContext *s)
1580 len = get_bits(&s->gb, 16);
1582 return AVERROR_INVALIDDATA;
1583 if (8 * len > get_bits_left(&s->gb))
1584 return AVERROR_INVALIDDATA;
1586 id = get_bits_long(&s->gb, 32);
1589 if (s->avctx->debug & FF_DEBUG_STARTCODE) {
1591 av_get_codec_tag_string(id_str, sizeof(id_str), av_bswap32(id));
1592 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n", id_str, id, len);
1595 /* Buggy AVID, it puts EOI only at every 10th frame. */
1596 /* Also, this fourcc is used by non-avid files too, it holds some
1597 information, but it's always present in AVID-created files. */
1598 if (id == AV_RB32("AVI1")) {
1604 4bytes field_size_less_padding
1607 i = get_bits(&s->gb, 8); len--;
1608 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1610 skip_bits(&s->gb, 8);
1611 skip_bits(&s->gb, 32);
1612 skip_bits(&s->gb, 32);
1620 if (id == AV_RB32("JFIF")) {
1621 int t_w, t_h, v1, v2;
1622 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1623 v1 = get_bits(&s->gb, 8);
1624 v2 = get_bits(&s->gb, 8);
1625 skip_bits(&s->gb, 8);
1627 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1628 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1629 ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
1631 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1632 av_log(s->avctx, AV_LOG_INFO,
1633 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1635 s->avctx->sample_aspect_ratio.num,
1636 s->avctx->sample_aspect_ratio.den);
1638 t_w = get_bits(&s->gb, 8);
1639 t_h = get_bits(&s->gb, 8);
1641 /* skip thumbnail */
1642 if (len -10 - (t_w * t_h * 3) > 0)
1643 len -= t_w * t_h * 3;
1649 if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1650 skip_bits(&s->gb, 16); /* version */
1651 skip_bits(&s->gb, 16); /* flags0 */
1652 skip_bits(&s->gb, 16); /* flags1 */
1653 s->adobe_transform = get_bits(&s->gb, 8);
1654 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1655 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1660 if (id == AV_RB32("LJIF")) {
1662 int pegasus_rct = s->pegasus_rct;
1663 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1664 av_log(s->avctx, AV_LOG_INFO,
1665 "Pegasus lossless jpeg header found\n");
1666 skip_bits(&s->gb, 16); /* version ? */
1667 skip_bits(&s->gb, 16); /* unknown always 0? */
1668 skip_bits(&s->gb, 16); /* unknown always 0? */
1669 skip_bits(&s->gb, 16); /* unknown always 0? */
1670 switch (i=get_bits(&s->gb, 8)) {
1680 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1685 if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
1686 av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
1691 s->pegasus_rct = pegasus_rct;
1695 if (id == AV_RL32("colr") && len > 0) {
1696 s->colr = get_bits(&s->gb, 8);
1697 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1698 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1702 if (id == AV_RL32("xfrm") && len > 0) {
1703 s->xfrm = get_bits(&s->gb, 8);
1704 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1705 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1710 /* JPS extension by VRex */
1711 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1712 int flags, layout, type;
1713 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1714 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1716 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1717 skip_bits(&s->gb, 16); len -= 2; /* block length */
1718 skip_bits(&s->gb, 8); /* reserved */
1719 flags = get_bits(&s->gb, 8);
1720 layout = get_bits(&s->gb, 8);
1721 type = get_bits(&s->gb, 8);
1724 s->stereo3d = av_stereo3d_alloc();
1729 s->stereo3d->type = AV_STEREO3D_2D;
1730 } else if (type == 1) {
1733 s->stereo3d->type = AV_STEREO3D_LINES;
1736 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1739 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1742 if (!(flags & 0x04)) {
1743 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1750 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1751 GetByteContext gbytes;
1752 int ret, le, ifd_offset, bytes_read;
1753 const uint8_t *aligned;
1755 skip_bits(&s->gb, 16); // skip padding
1758 // init byte wise reading
1759 aligned = align_get_bits(&s->gb);
1760 bytestream2_init(&gbytes, aligned, len);
1763 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1765 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1767 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1769 // read 0th IFD and store the metadata
1770 // (return values > 0 indicate the presence of subimage metadata)
1771 ret = avpriv_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1773 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1777 bytes_read = bytestream2_tell(&gbytes);
1778 skip_bits(&s->gb, bytes_read << 3);
1785 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1786 id = get_bits_long(&s->gb, 32);
1789 if (id == AV_RB32("mjpg")) {
1791 skip_bits(&s->gb, 32); /* field size */
1792 skip_bits(&s->gb, 32); /* pad field size */
1793 skip_bits(&s->gb, 32); /* next off */
1794 skip_bits(&s->gb, 32); /* quant off */
1795 skip_bits(&s->gb, 32); /* huff off */
1796 skip_bits(&s->gb, 32); /* image off */
1797 skip_bits(&s->gb, 32); /* scan off */
1798 skip_bits(&s->gb, 32); /* data off */
1800 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1801 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1806 /* slow but needed for extreme adobe jpegs */
1808 av_log(s->avctx, AV_LOG_ERROR,
1809 "mjpeg: error, decode_app parser read over the end\n");
1811 skip_bits(&s->gb, 8);
1816 static int mjpeg_decode_com(MJpegDecodeContext *s)
1818 int len = get_bits(&s->gb, 16);
1819 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1820 char *cbuf = av_malloc(len - 1);
1823 for (i = 0; i < len - 2; i++)
1824 cbuf[i] = get_bits(&s->gb, 8);
1825 if (i > 0 && cbuf[i - 1] == '\n')
1830 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1831 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1833 /* buggy avid, it puts EOI only at every 10th frame */
1834 if (!strncmp(cbuf, "AVID", 4)) {
1835 parse_avid(s, cbuf, len);
1836 } else if (!strcmp(cbuf, "CS=ITU601"))
1838 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
1839 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1841 else if (!strcmp(cbuf, "MULTISCOPE II"))
1851 /* return the 8 bit start code value and update the search
1852 state. Return -1 if no start code found */
1853 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1855 const uint8_t *buf_ptr;
1860 buf_ptr = *pbuf_ptr;
1861 while (buf_end - buf_ptr > 1) {
1864 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1873 ff_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1874 *pbuf_ptr = buf_ptr;
1878 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1879 const uint8_t **buf_ptr, const uint8_t *buf_end,
1880 const uint8_t **unescaped_buf_ptr,
1881 int *unescaped_buf_size)
1884 start_code = find_marker(buf_ptr, buf_end);
1886 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1888 return AVERROR(ENOMEM);
1890 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1891 if (start_code == SOS && !s->ls) {
1892 const uint8_t *src = *buf_ptr;
1893 uint8_t *dst = s->buffer;
1895 while (src < buf_end) {
1896 uint8_t x = *(src++);
1899 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1901 while (src < buf_end && x == 0xff)
1904 if (x >= 0xd0 && x <= 0xd7)
1911 *unescaped_buf_ptr = s->buffer;
1912 *unescaped_buf_size = dst - s->buffer;
1913 memset(s->buffer + *unescaped_buf_size, 0,
1914 AV_INPUT_BUFFER_PADDING_SIZE);
1916 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
1917 (buf_end - *buf_ptr) - (dst - s->buffer));
1918 } else if (start_code == SOS && s->ls) {
1919 const uint8_t *src = *buf_ptr;
1920 uint8_t *dst = s->buffer;
1926 while (src + t < buf_end) {
1927 uint8_t x = src[t++];
1929 while ((src + t < buf_end) && x == 0xff)
1938 init_put_bits(&pb, dst, t);
1940 /* unescape bitstream */
1942 uint8_t x = src[b++];
1943 put_bits(&pb, 8, x);
1947 av_log(s->avctx, AV_LOG_WARNING, "Invalid escape sequence\n");
1950 put_bits(&pb, 7, x);
1954 flush_put_bits(&pb);
1956 *unescaped_buf_ptr = dst;
1957 *unescaped_buf_size = (bit_count + 7) >> 3;
1958 memset(s->buffer + *unescaped_buf_size, 0,
1959 AV_INPUT_BUFFER_PADDING_SIZE);
1961 *unescaped_buf_ptr = *buf_ptr;
1962 *unescaped_buf_size = buf_end - *buf_ptr;
1968 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1971 AVFrame *frame = data;
1972 const uint8_t *buf = avpkt->data;
1973 int buf_size = avpkt->size;
1974 MJpegDecodeContext *s = avctx->priv_data;
1975 const uint8_t *buf_end, *buf_ptr;
1976 const uint8_t *unescaped_buf_ptr;
1978 int unescaped_buf_size;
1984 av_dict_free(&s->exif_metadata);
1985 av_freep(&s->stereo3d);
1986 s->adobe_transform = -1;
1989 buf_end = buf + buf_size;
1990 while (buf_ptr < buf_end) {
1991 /* find start next marker */
1992 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1994 &unescaped_buf_size);
1996 if (start_code < 0) {
1998 } else if (unescaped_buf_size > INT_MAX / 8) {
1999 av_log(avctx, AV_LOG_ERROR,
2000 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
2001 start_code, unescaped_buf_size, buf_size);
2002 return AVERROR_INVALIDDATA;
2004 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
2005 start_code, buf_end - buf_ptr);
2007 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
2010 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
2014 s->start_code = start_code;
2015 if (s->avctx->debug & FF_DEBUG_STARTCODE)
2016 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
2018 /* process markers */
2019 if (start_code >= 0xd0 && start_code <= 0xd7)
2020 av_log(avctx, AV_LOG_DEBUG,
2021 "restart marker: %d\n", start_code & 0x0f);
2023 else if (start_code >= APP0 && start_code <= APP15)
2024 mjpeg_decode_app(s);
2026 else if (start_code == COM)
2027 mjpeg_decode_com(s);
2031 if (!CONFIG_JPEGLS_DECODER &&
2032 (start_code == SOF48 || start_code == LSE)) {
2033 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
2034 return AVERROR(ENOSYS);
2037 switch (start_code) {
2039 s->restart_interval = 0;
2040 s->restart_count = 0;
2041 /* nothing to do on SOI */
2044 ff_mjpeg_decode_dqt(s);
2047 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
2048 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
2057 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2064 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2068 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2072 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2076 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2080 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2084 if (!CONFIG_JPEGLS_DECODER ||
2085 (ret = ff_jpegls_decode_lse(s)) < 0)
2091 if (!s->got_picture) {
2092 av_log(avctx, AV_LOG_WARNING,
2093 "Found EOI before any SOF, ignoring\n");
2096 if (s->interlaced) {
2097 s->bottom_field ^= 1;
2098 /* if not bottom field, do not output image yet */
2099 if (s->bottom_field == !s->interlace_polarity)
2102 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2108 int qp = FFMAX3(s->qscale[0],
2111 int qpw = (s->width + 15) / 16;
2112 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2114 memset(qp_table_buf->data, qp, qpw);
2115 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2118 if(avctx->debug & FF_DEBUG_QP)
2119 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2125 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2126 (avctx->err_recognition & AV_EF_EXPLODE))
2130 mjpeg_decode_dri(s);
2142 av_log(avctx, AV_LOG_ERROR,
2143 "mjpeg: unsupported coding type (%x)\n", start_code);
2147 /* eof process start code */
2148 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2149 av_log(avctx, AV_LOG_DEBUG,
2150 "marker parser used %d bytes (%d bits)\n",
2151 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2153 if (s->got_picture && s->cur_scan) {
2154 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2157 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2158 return AVERROR_INVALIDDATA;
2164 is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step_minus1;
2166 if (AV_RB32(s->upscale_h)) {
2168 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2169 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2170 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2171 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2172 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2173 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2174 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2175 avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2176 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2177 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2178 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2179 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2181 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2182 for (p = 0; p<4; p++) {
2183 uint8_t *line = s->picture_ptr->data[p];
2186 if (!s->upscale_h[p])
2189 w = FF_CEIL_RSHIFT(w, hshift);
2190 h = FF_CEIL_RSHIFT(h, vshift);
2192 if (s->upscale_v[p])
2195 for (i = 0; i < h; i++) {
2196 if (s->upscale_h[p] == 1) {
2197 if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2198 else line[w - 1] = line[(w - 1) / 2];
2199 for (index = w - 2; index > 0; index--) {
2201 ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2203 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2205 } else if (s->upscale_h[p] == 2) {
2207 ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 3];
2209 ((uint16_t*)line)[w - 2] = ((uint16_t*)line)[w - 1];
2211 line[w - 1] = line[(w - 1) / 3];
2213 line[w - 2] = line[w - 1];
2215 for (index = w - 3; index > 0; index--) {
2216 line[index] = (line[index / 3] + line[(index + 1) / 3] + line[(index + 2) / 3] + 1) / 3;
2219 line += s->linesize[p];
2223 if (AV_RB32(s->upscale_v)) {
2225 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2226 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2227 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2228 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2229 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2230 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2231 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2232 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2233 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2234 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2235 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2236 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2237 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2239 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2240 for (p = 0; p < 4; p++) {
2244 if (!s->upscale_v[p])
2247 w = FF_CEIL_RSHIFT(w, hshift);
2248 h = FF_CEIL_RSHIFT(h, vshift);
2250 dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2251 for (i = h - 1; i; i--) {
2252 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2253 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2254 if (src1 == src2 || i == h - 1) {
2255 memcpy(dst, src1, w);
2257 for (index = 0; index < w; index++)
2258 dst[index] = (src1[index] + src2[index]) >> 1;
2260 dst -= s->linesize[p];
2266 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2267 for (index=0; index<4; index++) {
2268 uint8_t *dst = s->picture_ptr->data[index];
2269 int w = s->picture_ptr->width;
2270 int h = s->picture_ptr->height;
2271 if(index && index<3){
2272 w = FF_CEIL_RSHIFT(w, hshift);
2273 h = FF_CEIL_RSHIFT(h, vshift);
2276 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2277 for (i=0; i<h/2; i++) {
2279 FFSWAP(int, dst[j], dst2[j]);
2280 dst += s->picture_ptr->linesize[index];
2281 dst2 -= s->picture_ptr->linesize[index];
2286 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2287 int w = s->picture_ptr->width;
2288 int h = s->picture_ptr->height;
2289 for (i=0; i<h; i++) {
2292 for (index=0; index<4; index++) {
2293 dst[index] = s->picture_ptr->data[index]
2294 + s->picture_ptr->linesize[index]*i;
2296 for (j=0; j<w; j++) {
2298 int r = dst[0][j] * k;
2299 int g = dst[1][j] * k;
2300 int b = dst[2][j] * k;
2301 dst[0][j] = g*257 >> 16;
2302 dst[1][j] = b*257 >> 16;
2303 dst[2][j] = r*257 >> 16;
2308 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2309 int w = s->picture_ptr->width;
2310 int h = s->picture_ptr->height;
2311 for (i=0; i<h; i++) {
2314 for (index=0; index<4; index++) {
2315 dst[index] = s->picture_ptr->data[index]
2316 + s->picture_ptr->linesize[index]*i;
2318 for (j=0; j<w; j++) {
2320 int r = (255 - dst[0][j]) * k;
2321 int g = (128 - dst[1][j]) * k;
2322 int b = (128 - dst[2][j]) * k;
2323 dst[0][j] = r*257 >> 16;
2324 dst[1][j] = (g*257 >> 16) + 128;
2325 dst[2][j] = (b*257 >> 16) + 128;
2332 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2334 stereo->type = s->stereo3d->type;
2335 stereo->flags = s->stereo3d->flags;
2337 av_freep(&s->stereo3d);
2340 av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
2341 av_dict_free(&s->exif_metadata);
2343 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2345 // return buf_end - buf_ptr;
2346 return buf_ptr - buf;
2349 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2351 MJpegDecodeContext *s = avctx->priv_data;
2354 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2355 av_log(avctx, AV_LOG_INFO, "Single field\n");
2359 av_frame_free(&s->picture);
2360 s->picture_ptr = NULL;
2361 } else if (s->picture_ptr)
2362 av_frame_unref(s->picture_ptr);
2364 av_freep(&s->buffer);
2365 av_freep(&s->stereo3d);
2366 av_freep(&s->ljpeg_buffer);
2367 s->ljpeg_buffer_size = 0;
2369 for (i = 0; i < 3; i++) {
2370 for (j = 0; j < 4; j++)
2371 ff_free_vlc(&s->vlcs[i][j]);
2373 for (i = 0; i < MAX_COMPONENTS; i++) {
2374 av_freep(&s->blocks[i]);
2375 av_freep(&s->last_nnz[i]);
2377 av_dict_free(&s->exif_metadata);
2381 static void decode_flush(AVCodecContext *avctx)
2383 MJpegDecodeContext *s = avctx->priv_data;
2387 #if CONFIG_MJPEG_DECODER
2388 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2389 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2390 static const AVOption options[] = {
2391 { "extern_huff", "Use external huffman table.",
2392 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
2396 static const AVClass mjpegdec_class = {
2397 .class_name = "MJPEG decoder",
2398 .item_name = av_default_item_name,
2400 .version = LIBAVUTIL_VERSION_INT,
2403 AVCodec ff_mjpeg_decoder = {
2405 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2406 .type = AVMEDIA_TYPE_VIDEO,
2407 .id = AV_CODEC_ID_MJPEG,
2408 .priv_data_size = sizeof(MJpegDecodeContext),
2409 .init = ff_mjpeg_decode_init,
2410 .close = ff_mjpeg_decode_end,
2411 .decode = ff_mjpeg_decode_frame,
2412 .flush = decode_flush,
2413 .capabilities = AV_CODEC_CAP_DR1,
2415 .priv_class = &mjpegdec_class,
2416 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
2419 #if CONFIG_THP_DECODER
2420 AVCodec ff_thp_decoder = {
2422 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2423 .type = AVMEDIA_TYPE_VIDEO,
2424 .id = AV_CODEC_ID_THP,
2425 .priv_data_size = sizeof(MJpegDecodeContext),
2426 .init = ff_mjpeg_decode_init,
2427 .close = ff_mjpeg_decode_end,
2428 .decode = ff_mjpeg_decode_frame,
2429 .flush = decode_flush,
2430 .capabilities = AV_CODEC_CAP_DR1,
2432 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,