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"
37 #include "copy_block.h"
41 #include "jpeglsdec.h"
44 #include "bytestream.h"
47 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
48 const uint8_t *val_table, int nb_codes,
49 int use_static, int is_ac)
51 uint8_t huff_size[256] = { 0 };
52 uint16_t huff_code[256];
53 uint16_t huff_sym[256];
56 av_assert0(nb_codes <= 256);
58 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
60 for (i = 0; i < 256; i++)
61 huff_sym[i] = i + 16 * is_ac;
64 huff_sym[0] = 16 * 256;
66 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
67 huff_code, 2, 2, huff_sym, 2, 2, use_static);
70 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
72 build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
73 avpriv_mjpeg_val_dc, 12, 0, 0);
74 build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
75 avpriv_mjpeg_val_dc, 12, 0, 0);
76 build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
77 avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
78 build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
79 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
80 build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
81 avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
82 build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
83 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
86 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
88 MJpegDecodeContext *s = avctx->priv_data;
90 if (!s->picture_ptr) {
91 s->picture = av_frame_alloc();
93 return AVERROR(ENOMEM);
94 s->picture_ptr = s->picture;
98 ff_hpeldsp_init(&s->hdsp, avctx->flags);
99 ff_dsputil_init(&s->dsp, avctx);
100 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
104 s->first_picture = 1;
106 s->org_height = avctx->coded_height;
107 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
109 build_basic_mjpeg_vlc(s);
111 if (s->extern_huff) {
112 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
113 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
114 if (ff_mjpeg_decode_dht(s)) {
115 av_log(avctx, AV_LOG_ERROR,
116 "error using external huffman table, switching back to internal\n");
117 build_basic_mjpeg_vlc(s);
120 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
121 s->interlace_polarity = 1; /* bottom field first */
122 av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
124 if (avctx->codec->id == AV_CODEC_ID_AMV)
131 /* quantize tables */
132 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
134 int len, index, i, j;
136 len = get_bits(&s->gb, 16) - 2;
139 int pr = get_bits(&s->gb, 4);
141 av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
142 return AVERROR_INVALIDDATA;
144 index = get_bits(&s->gb, 4);
147 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
148 /* read quant table */
149 for (i = 0; i < 64; i++) {
150 j = s->scantable.permutated[i];
151 s->quant_matrixes[index][j] = get_bits(&s->gb, pr ? 16 : 8);
154 // XXX FIXME finetune, and perhaps add dc too
155 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
156 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
157 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
158 index, s->qscale[index]);
164 /* decode huffman tables and build VLC decoders */
165 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
167 int len, index, i, class, n, v, code_max;
168 uint8_t bits_table[17];
169 uint8_t val_table[256];
172 len = get_bits(&s->gb, 16) - 2;
176 return AVERROR_INVALIDDATA;
177 class = get_bits(&s->gb, 4);
179 return AVERROR_INVALIDDATA;
180 index = get_bits(&s->gb, 4);
182 return AVERROR_INVALIDDATA;
184 for (i = 1; i <= 16; i++) {
185 bits_table[i] = get_bits(&s->gb, 8);
189 if (len < n || n > 256)
190 return AVERROR_INVALIDDATA;
193 for (i = 0; i < n; i++) {
194 v = get_bits(&s->gb, 8);
201 /* build VLC and flush previous vlc if present */
202 ff_free_vlc(&s->vlcs[class][index]);
203 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
204 class, index, code_max + 1);
205 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
206 code_max + 1, 0, class > 0)) < 0)
210 ff_free_vlc(&s->vlcs[2][index]);
211 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
212 code_max + 1, 0, 0)) < 0)
219 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
221 int len, nb_components, i, width, height, pix_fmt_id, ret;
222 int h_count[MAX_COMPONENTS];
223 int v_count[MAX_COMPONENTS];
226 s->upscale_h = s->upscale_v = 0;
228 /* XXX: verify len field validity */
229 len = get_bits(&s->gb, 16);
230 s->avctx->bits_per_raw_sample =
231 s->bits = get_bits(&s->gb, 8);
235 if (s->bits == 9 && !s->pegasus_rct)
236 s->rct = 1; // FIXME ugly
238 if(s->lossless && s->avctx->lowres){
239 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
243 height = get_bits(&s->gb, 16);
244 width = get_bits(&s->gb, 16);
246 // HACK for odd_height.mov
247 if (s->interlaced && s->width == width && s->height == height + 1)
250 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
251 if (av_image_check_size(width, height, 0, s->avctx))
252 return AVERROR_INVALIDDATA;
254 nb_components = get_bits(&s->gb, 8);
255 if (nb_components <= 0 ||
256 nb_components > MAX_COMPONENTS)
258 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
259 if (nb_components != s->nb_components) {
260 av_log(s->avctx, AV_LOG_ERROR,
261 "nb_components changing in interlaced picture\n");
262 return AVERROR_INVALIDDATA;
265 if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
266 avpriv_report_missing_feature(s->avctx,
267 "JPEG-LS that is not <= 8 "
268 "bits/component or 16-bit gray");
269 return AVERROR_PATCHWELCOME;
271 s->nb_components = nb_components;
274 memset(h_count, 0, sizeof(h_count));
275 memset(v_count, 0, sizeof(v_count));
276 for (i = 0; i < nb_components; i++) {
278 s->component_id[i] = get_bits(&s->gb, 8) - 1;
279 h_count[i] = get_bits(&s->gb, 4);
280 v_count[i] = get_bits(&s->gb, 4);
281 /* compute hmax and vmax (only used in interleaved case) */
282 if (h_count[i] > s->h_max)
283 s->h_max = h_count[i];
284 if (v_count[i] > s->v_max)
285 s->v_max = v_count[i];
286 s->quant_index[i] = get_bits(&s->gb, 8);
287 if (s->quant_index[i] >= 4) {
288 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
289 return AVERROR_INVALIDDATA;
291 if (!h_count[i] || !v_count[i]) {
292 av_log(s->avctx, AV_LOG_ERROR,
293 "Invalid sampling factor in component %d %d:%d\n",
294 i, h_count[i], v_count[i]);
295 return AVERROR_INVALIDDATA;
298 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
299 i, h_count[i], v_count[i],
300 s->component_id[i], s->quant_index[i]);
303 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
304 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
305 return AVERROR_PATCHWELCOME;
309 /* if different size, realloc/alloc picture */
310 if ( width != s->width || height != s->height
311 || memcmp(s->h_count, h_count, sizeof(h_count))
312 || memcmp(s->v_count, v_count, sizeof(v_count))) {
316 memcpy(s->h_count, h_count, sizeof(h_count));
317 memcpy(s->v_count, v_count, sizeof(v_count));
321 /* test interlaced mode */
322 if (s->first_picture &&
323 s->org_height != 0 &&
324 s->height < ((s->org_height * 3) / 4)) {
326 s->bottom_field = s->interlace_polarity;
327 s->picture_ptr->interlaced_frame = 1;
328 s->picture_ptr->top_field_first = !s->interlace_polarity;
332 ret = ff_set_dimensions(s->avctx, width, height);
336 s->first_picture = 0;
339 if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
340 if (s->progressive) {
341 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
342 return AVERROR_INVALIDDATA;
345 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
347 else if (!s->lossless)
349 /* XXX: not complete test ! */
350 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
351 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
352 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
353 (s->h_count[3] << 4) | s->v_count[3];
354 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
355 /* NOTE we do not allocate pictures large enough for the possible
356 * padding of h/v_count being 4 */
357 if (!(pix_fmt_id & 0xD0D0D0D0))
358 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
359 if (!(pix_fmt_id & 0x0D0D0D0D))
360 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
362 switch (pix_fmt_id) {
365 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
367 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
368 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
370 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
371 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
372 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
375 av_assert0(s->nb_components == 3);
379 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
381 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
382 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
384 av_assert0(s->nb_components == 4);
388 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
391 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
393 s->upscale_h = (pix_fmt_id == 0x22122100);
394 s->chroma_height = s->height;
398 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
401 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
402 s->upscale_v = (pix_fmt_id == 0x22211200);
404 s->chroma_height = s->height;
407 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
410 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
413 s->chroma_height = s->height / 2;
425 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
427 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
432 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
435 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
436 s->upscale_h = (pix_fmt_id == 0x22211100) * 2 + (pix_fmt_id == 0x22112100);
437 s->chroma_height = s->height / 2;
440 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
441 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
442 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
446 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
449 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
450 s->upscale_v = (pix_fmt_id == 0x22121100) + 1;
453 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
454 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
455 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
458 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
461 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
465 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
466 return AVERROR_PATCHWELCOME;
468 if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
469 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
470 return AVERROR_PATCHWELCOME;
473 s->upscale_h = s->upscale_v = 0;
474 if (s->nb_components > 1)
475 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
476 else if (s->bits <= 8)
477 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
479 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
482 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
484 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
488 av_frame_unref(s->picture_ptr);
489 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
491 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
492 s->picture_ptr->key_frame = 1;
495 for (i = 0; i < 3; i++)
496 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
498 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
499 s->width, s->height, s->linesize[0], s->linesize[1],
500 s->interlaced, s->avctx->height);
502 if (len != (8 + (3 * nb_components)))
503 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
506 if (s->rgb && !s->lossless && !s->ls) {
507 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
508 return AVERROR_PATCHWELCOME;
511 /* totally blank picture as progressive JPEG will only add details to it */
512 if (s->progressive) {
513 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
514 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
515 for (i = 0; i < s->nb_components; i++) {
516 int size = bw * bh * s->h_count[i] * s->v_count[i];
517 av_freep(&s->blocks[i]);
518 av_freep(&s->last_nnz[i]);
519 s->blocks[i] = av_mallocz(size * sizeof(**s->blocks));
520 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
521 if (!s->blocks[i] || !s->last_nnz[i])
522 return AVERROR(ENOMEM);
523 s->block_stride[i] = bw * s->h_count[i];
525 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
530 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
533 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
534 if (code < 0 || code > 16) {
535 av_log(s->avctx, AV_LOG_WARNING,
536 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
537 0, dc_index, &s->vlcs[0][dc_index]);
542 return get_xbits(&s->gb, code);
547 /* decode block and dequantize */
548 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
549 int dc_index, int ac_index, int16_t *quant_matrix)
551 int code, i, j, level, val;
554 val = mjpeg_decode_dc(s, dc_index);
555 if (val == 0xfffff) {
556 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
557 return AVERROR_INVALIDDATA;
559 val = val * quant_matrix[0] + s->last_dc[component];
560 s->last_dc[component] = val;
564 {OPEN_READER(re, &s->gb);
566 UPDATE_CACHE(re, &s->gb);
567 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
569 i += ((unsigned)code) >> 4;
572 if (code > MIN_CACHE_BITS - 16)
573 UPDATE_CACHE(re, &s->gb);
576 int cache = GET_CACHE(re, &s->gb);
577 int sign = (~cache) >> 31;
578 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
581 LAST_SKIP_BITS(re, &s->gb, code);
584 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
585 return AVERROR_INVALIDDATA;
587 j = s->scantable.permutated[i];
588 block[j] = level * quant_matrix[j];
591 CLOSE_READER(re, &s->gb);}
596 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
597 int component, int dc_index,
598 int16_t *quant_matrix, int Al)
601 s->dsp.clear_block(block);
602 val = mjpeg_decode_dc(s, dc_index);
603 if (val == 0xfffff) {
604 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
605 return AVERROR_INVALIDDATA;
607 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
608 s->last_dc[component] = val;
613 /* decode block and dequantize - progressive JPEG version */
614 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
615 uint8_t *last_nnz, int ac_index,
616 int16_t *quant_matrix,
617 int ss, int se, int Al, int *EOBRUN)
619 int code, i, j, level, val, run;
627 OPEN_READER(re, &s->gb);
628 for (i = ss; ; i++) {
629 UPDATE_CACHE(re, &s->gb);
630 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
632 run = ((unsigned) code) >> 4;
636 if (code > MIN_CACHE_BITS - 16)
637 UPDATE_CACHE(re, &s->gb);
640 int cache = GET_CACHE(re, &s->gb);
641 int sign = (~cache) >> 31;
642 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
645 LAST_SKIP_BITS(re, &s->gb, code);
649 j = s->scantable.permutated[se];
650 block[j] = level * quant_matrix[j] << Al;
653 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
654 return AVERROR_INVALIDDATA;
656 j = s->scantable.permutated[i];
657 block[j] = level * quant_matrix[j] << Al;
659 if (run == 0xF) {// ZRL - skip 15 coefficients
662 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
663 return AVERROR_INVALIDDATA;
668 UPDATE_CACHE(re, &s->gb);
669 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
670 LAST_SKIP_BITS(re, &s->gb, run);
677 CLOSE_READER(re, &s->gb);
686 #define REFINE_BIT(j) { \
687 UPDATE_CACHE(re, &s->gb); \
688 sign = block[j] >> 15; \
689 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
690 ((quant_matrix[j] ^ sign) - sign) << Al; \
691 LAST_SKIP_BITS(re, &s->gb, 1); \
699 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
704 j = s->scantable.permutated[i]; \
707 else if (run-- == 0) \
711 /* decode block and dequantize - progressive JPEG refinement pass */
712 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
714 int ac_index, int16_t *quant_matrix,
715 int ss, int se, int Al, int *EOBRUN)
717 int code, i = ss, j, sign, val, run;
718 int last = FFMIN(se, *last_nnz);
720 OPEN_READER(re, &s->gb);
725 UPDATE_CACHE(re, &s->gb);
726 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
729 run = ((unsigned) code) >> 4;
730 UPDATE_CACHE(re, &s->gb);
731 val = SHOW_UBITS(re, &s->gb, 1);
732 LAST_SKIP_BITS(re, &s->gb, 1);
734 j = s->scantable.permutated[i];
736 block[j] = ((quant_matrix[j]^val) - val) << Al;
740 CLOSE_READER(re, &s->gb);
744 run = ((unsigned) code) >> 4;
751 UPDATE_CACHE(re, &s->gb);
752 run += SHOW_UBITS(re, &s->gb, val);
753 LAST_SKIP_BITS(re, &s->gb, val);
765 for (; i <= last; i++) {
766 j = s->scantable.permutated[i];
770 CLOSE_READER(re, &s->gb);
777 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
782 if (s->restart_interval) {
784 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
785 align_get_bits(&s->gb);
786 for (i = 0; i < nb_components; i++) /* reset dc */
787 s->last_dc[i] = (4 << s->bits);
790 i = 8 + ((-get_bits_count(&s->gb)) & 7);
792 if (s->restart_count == 0) {
793 if( show_bits(&s->gb, i) == (1 << i) - 1
794 || show_bits(&s->gb, i) == 0xFF) {
795 int pos = get_bits_count(&s->gb);
796 align_get_bits(&s->gb);
797 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
798 skip_bits(&s->gb, 8);
799 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
800 for (i = 0; i < nb_components; i++) /* reset dc */
801 s->last_dc[i] = (4 << s->bits);
804 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
811 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
814 uint16_t (*buffer)[4];
815 int left[4], top[4], topleft[4];
816 const int linesize = s->linesize[0];
817 const int mask = ((1 << s->bits) - 1) << point_transform;
821 if (s->nb_components != 3 && s->nb_components != 4)
822 return AVERROR_INVALIDDATA;
823 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
824 return AVERROR_INVALIDDATA;
827 s->restart_count = s->restart_interval;
829 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
830 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
831 buffer = s->ljpeg_buffer;
833 for (i = 0; i < 4; i++)
834 buffer[0][i] = 1 << (s->bits - 1);
836 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
837 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
839 if (s->interlaced && s->bottom_field)
840 ptr += linesize >> 1;
842 for (i = 0; i < 4; i++)
843 top[i] = left[i] = topleft[i] = buffer[0][i];
845 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
846 int modified_predictor = predictor;
848 if (s->restart_interval && !s->restart_count){
849 s->restart_count = s->restart_interval;
853 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
855 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
856 modified_predictor = 1;
858 for (i=0;i<nb_components;i++) {
862 top[i] = buffer[mb_x][i];
864 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
866 dc = mjpeg_decode_dc(s, s->dc_index[i]);
870 left[i] = buffer[mb_x][i] =
871 mask & (pred + (dc << point_transform));
874 if (s->restart_interval && !--s->restart_count) {
875 align_get_bits(&s->gb);
876 skip_bits(&s->gb, 16); /* skip RSTn */
879 if (s->nb_components == 4) {
880 for(i=0; i<nb_components; i++) {
881 int c= s->comp_index[i];
883 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
884 ptr[4*mb_x+3-c] = buffer[mb_x][i];
886 } else if(s->bits == 9) {
887 return AVERROR_PATCHWELCOME;
889 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
890 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
895 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
896 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
897 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
898 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
900 } else if (s->pegasus_rct) {
901 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
902 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
903 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
904 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
907 for(i=0; i<nb_components; i++) {
908 int c= s->comp_index[i];
910 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
911 ptr[3*mb_x+2-c] = buffer[mb_x][i];
913 } else if(s->bits == 9) {
914 return AVERROR_PATCHWELCOME;
916 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
917 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
926 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
927 int point_transform, int nb_components)
929 int i, mb_x, mb_y, mask;
930 int bits= (s->bits+7)&~7;
934 point_transform += bits - s->bits;
935 mask = ((1 << s->bits) - 1) << point_transform;
937 av_assert0(nb_components>=1 && nb_components<=4);
939 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
940 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
941 if (s->restart_interval && !s->restart_count){
942 s->restart_count = s->restart_interval;
947 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
948 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
949 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
950 for (i = 0; i < nb_components; i++) {
953 int n, h, v, x, y, c, j, linesize;
955 c = s->comp_index[i];
960 linesize= s->linesize[c];
962 if(bits>8) linesize /= 2;
967 dc = mjpeg_decode_dc(s, s->dc_index[i]);
971 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
974 pred= 1 << (bits - 1);
980 pred= ptr[-linesize];
982 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
986 if (s->interlaced && s->bottom_field)
987 ptr += linesize >> 1;
989 *ptr= pred + (dc << point_transform);
991 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
994 pred= 1 << (bits - 1);
1000 pred= ptr16[-linesize];
1002 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1006 if (s->interlaced && s->bottom_field)
1007 ptr16 += linesize >> 1;
1009 *ptr16= pred + (dc << point_transform);
1018 for (i = 0; i < nb_components; i++) {
1021 int n, h, v, x, y, c, j, linesize, dc;
1022 n = s->nb_blocks[i];
1023 c = s->comp_index[i];
1028 linesize = s->linesize[c];
1030 if(bits>8) linesize /= 2;
1032 for (j = 0; j < n; j++) {
1035 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1039 ptr = s->picture_ptr->data[c] +
1040 (linesize * (v * mb_y + y)) +
1041 (h * mb_x + x); //FIXME optimize this crap
1042 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1045 *ptr = pred + (dc << point_transform);
1047 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1048 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1051 *ptr16= pred + (dc << point_transform);
1061 if (s->restart_interval && !--s->restart_count) {
1062 align_get_bits(&s->gb);
1063 skip_bits(&s->gb, 16); /* skip RSTn */
1070 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1071 uint8_t *dst, const uint8_t *src,
1072 int linesize, int lowres)
1075 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1077 case 1: copy_block4(dst, src, linesize, linesize, 4);
1079 case 2: copy_block2(dst, src, linesize, linesize, 2);
1081 case 3: *dst = *src;
1086 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1088 int block_x, block_y;
1089 int size = 8 >> s->avctx->lowres;
1091 for (block_y=0; block_y<size; block_y++)
1092 for (block_x=0; block_x<size; block_x++)
1093 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1095 for (block_y=0; block_y<size; block_y++)
1096 for (block_x=0; block_x<size; block_x++)
1097 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1101 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1102 int Al, const uint8_t *mb_bitmask,
1103 int mb_bitmask_size,
1104 const AVFrame *reference)
1107 uint8_t *data[MAX_COMPONENTS];
1108 const uint8_t *reference_data[MAX_COMPONENTS];
1109 int linesize[MAX_COMPONENTS];
1110 GetBitContext mb_bitmask_gb;
1111 int bytes_per_pixel = 1 + (s->bits > 8);
1114 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1115 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1116 return AVERROR_INVALIDDATA;
1118 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1121 s->restart_count = 0;
1123 for (i = 0; i < nb_components; i++) {
1124 int c = s->comp_index[i];
1125 data[c] = s->picture_ptr->data[c];
1126 reference_data[c] = reference ? reference->data[c] : NULL;
1127 linesize[c] = s->linesize[c];
1128 s->coefs_finished[c] |= 1;
1131 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1132 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1133 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1135 if (s->restart_interval && !s->restart_count)
1136 s->restart_count = s->restart_interval;
1138 if (get_bits_left(&s->gb) < 0) {
1139 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1140 -get_bits_left(&s->gb));
1141 return AVERROR_INVALIDDATA;
1143 for (i = 0; i < nb_components; i++) {
1145 int n, h, v, x, y, c, j;
1147 n = s->nb_blocks[i];
1148 c = s->comp_index[i];
1153 for (j = 0; j < n; j++) {
1154 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1155 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1157 if (s->interlaced && s->bottom_field)
1158 block_offset += linesize[c] >> 1;
1159 ptr = data[c] + block_offset;
1160 if (!s->progressive) {
1162 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1163 linesize[c], s->avctx->lowres);
1166 s->dsp.clear_block(s->block);
1167 if (decode_block(s, s->block, i,
1168 s->dc_index[i], s->ac_index[i],
1169 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1170 av_log(s->avctx, AV_LOG_ERROR,
1171 "error y=%d x=%d\n", mb_y, mb_x);
1172 return AVERROR_INVALIDDATA;
1174 s->dsp.idct_put(ptr, linesize[c], s->block);
1176 shift_output(s, ptr, linesize[c]);
1179 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1181 int16_t *block = s->blocks[c][block_idx];
1183 block[0] += get_bits1(&s->gb) *
1184 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1185 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1186 s->quant_matrixes[s->quant_sindex[i]],
1188 av_log(s->avctx, AV_LOG_ERROR,
1189 "error y=%d x=%d\n", mb_y, mb_x);
1190 return AVERROR_INVALIDDATA;
1193 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1194 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1195 mb_x, mb_y, x, y, c, s->bottom_field,
1196 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1204 handle_rstn(s, nb_components);
1210 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1211 int se, int Ah, int Al)
1215 int c = s->comp_index[0];
1216 uint8_t *data = s->picture_ptr->data[c];
1217 int linesize = s->linesize[c];
1219 int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1220 int bytes_per_pixel = 1 + (s->bits > 8);
1222 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1223 if (se < ss || se > 63) {
1224 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1225 return AVERROR_INVALIDDATA;
1229 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
1230 last_scan = !~s->coefs_finished[c];
1233 if (s->interlaced && s->bottom_field)
1234 data += linesize >> 1;
1236 s->restart_count = 0;
1238 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1239 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1240 int block_idx = mb_y * s->block_stride[c];
1241 int16_t (*block)[64] = &s->blocks[c][block_idx];
1242 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1243 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1245 if (s->restart_interval && !s->restart_count)
1246 s->restart_count = s->restart_interval;
1249 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1250 quant_matrix, ss, se, Al, &EOBRUN);
1252 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1253 quant_matrix, ss, se, Al, &EOBRUN);
1255 av_log(s->avctx, AV_LOG_ERROR,
1256 "error y=%d x=%d\n", mb_y, mb_x);
1257 return AVERROR_INVALIDDATA;
1261 s->dsp.idct_put(ptr, linesize, *block);
1263 shift_output(s, ptr, linesize);
1264 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1266 if (handle_rstn(s, 0))
1273 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1274 int mb_bitmask_size, const AVFrame *reference)
1276 int len, nb_components, i, h, v, predictor, point_transform;
1278 const int block_size = s->lossless ? 1 : 8;
1279 int ilv, prev_shift;
1281 if (!s->got_picture) {
1282 av_log(s->avctx, AV_LOG_WARNING,
1283 "Can not process SOS before SOF, skipping\n");
1287 av_assert0(s->picture_ptr->data[0]);
1288 /* XXX: verify len field validity */
1289 len = get_bits(&s->gb, 16);
1290 nb_components = get_bits(&s->gb, 8);
1291 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1292 av_log(s->avctx, AV_LOG_ERROR,
1293 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1294 return AVERROR_PATCHWELCOME;
1296 if (len != 6 + 2 * nb_components) {
1297 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1298 return AVERROR_INVALIDDATA;
1300 for (i = 0; i < nb_components; i++) {
1301 id = get_bits(&s->gb, 8) - 1;
1302 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1303 /* find component index */
1304 for (index = 0; index < s->nb_components; index++)
1305 if (id == s->component_id[index])
1307 if (index == s->nb_components) {
1308 av_log(s->avctx, AV_LOG_ERROR,
1309 "decode_sos: index(%d) out of components\n", index);
1310 return AVERROR_INVALIDDATA;
1312 /* Metasoft MJPEG codec has Cb and Cr swapped */
1313 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1314 && nb_components == 3 && s->nb_components == 3 && i)
1317 s->quant_sindex[i] = s->quant_index[index];
1318 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1319 s->h_scount[i] = s->h_count[index];
1320 s->v_scount[i] = s->v_count[index];
1322 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1324 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1325 index = (index+2)%3;
1327 s->comp_index[i] = index;
1329 s->dc_index[i] = get_bits(&s->gb, 4);
1330 s->ac_index[i] = get_bits(&s->gb, 4);
1332 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1333 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1335 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))
1339 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1340 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1341 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1342 prev_shift = get_bits(&s->gb, 4); /* Ah */
1343 point_transform = get_bits(&s->gb, 4); /* Al */
1345 prev_shift = point_transform = 0;
1347 if (nb_components > 1) {
1348 /* interleaved stream */
1349 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1350 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1351 } else if (!s->ls) { /* skip this for JPEG-LS */
1352 h = s->h_max / s->h_scount[0];
1353 v = s->v_max / s->v_scount[0];
1354 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1355 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1356 s->nb_blocks[0] = 1;
1361 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1362 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1363 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1364 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1365 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1368 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1369 for (i = s->mjpb_skiptosod; i > 0; i--)
1370 skip_bits(&s->gb, 8);
1373 for (i = 0; i < nb_components; i++)
1374 s->last_dc[i] = (4 << s->bits);
1377 av_assert0(s->picture_ptr == s->picture);
1378 if (CONFIG_JPEGLS_DECODER && s->ls) {
1380 // reset_ls_coding_parameters(s, 0);
1382 if ((ret = ff_jpegls_decode_picture(s, predictor,
1383 point_transform, ilv)) < 0)
1387 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1390 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1392 nb_components)) < 0)
1397 if (s->progressive && predictor) {
1398 av_assert0(s->picture_ptr == s->picture);
1399 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1401 point_transform)) < 0)
1404 if ((ret = mjpeg_decode_scan(s, nb_components,
1405 prev_shift, point_transform,
1406 mb_bitmask, mb_bitmask_size, reference)) < 0)
1411 if (s->interlaced &&
1412 get_bits_left(&s->gb) > 32 &&
1413 show_bits(&s->gb, 8) == 0xFF) {
1414 GetBitContext bak = s->gb;
1415 align_get_bits(&bak);
1416 if (show_bits(&bak, 16) == 0xFFD1) {
1417 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1419 skip_bits(&s->gb, 16);
1420 s->bottom_field ^= 1;
1429 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1430 return AVERROR_INVALIDDATA;
1433 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1435 if (get_bits(&s->gb, 16) != 4)
1436 return AVERROR_INVALIDDATA;
1437 s->restart_interval = get_bits(&s->gb, 16);
1438 s->restart_count = 0;
1439 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1440 s->restart_interval);
1445 static int mjpeg_decode_app(MJpegDecodeContext *s)
1449 len = get_bits(&s->gb, 16);
1451 return AVERROR_INVALIDDATA;
1452 if (8 * len > get_bits_left(&s->gb))
1453 return AVERROR_INVALIDDATA;
1455 id = get_bits_long(&s->gb, 32);
1458 if (s->avctx->debug & FF_DEBUG_STARTCODE) {
1460 av_get_codec_tag_string(id_str, sizeof(id_str), av_bswap32(id));
1461 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n", id_str, id, len);
1464 /* Buggy AVID, it puts EOI only at every 10th frame. */
1465 /* Also, this fourcc is used by non-avid files too, it holds some
1466 information, but it's always present in AVID-created files. */
1467 if (id == AV_RB32("AVI1")) {
1473 4bytes field_size_less_padding
1476 i = get_bits(&s->gb, 8); len--;
1477 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1479 skip_bits(&s->gb, 8);
1480 skip_bits(&s->gb, 32);
1481 skip_bits(&s->gb, 32);
1489 if (id == AV_RB32("JFIF")) {
1490 int t_w, t_h, v1, v2;
1491 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1492 v1 = get_bits(&s->gb, 8);
1493 v2 = get_bits(&s->gb, 8);
1494 skip_bits(&s->gb, 8);
1496 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1497 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1499 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1500 av_log(s->avctx, AV_LOG_INFO,
1501 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1503 s->avctx->sample_aspect_ratio.num,
1504 s->avctx->sample_aspect_ratio.den);
1506 t_w = get_bits(&s->gb, 8);
1507 t_h = get_bits(&s->gb, 8);
1509 /* skip thumbnail */
1510 if (len -10 - (t_w * t_h * 3) > 0)
1511 len -= t_w * t_h * 3;
1517 if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1518 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1519 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1520 skip_bits(&s->gb, 16); /* version */
1521 skip_bits(&s->gb, 16); /* flags0 */
1522 skip_bits(&s->gb, 16); /* flags1 */
1523 skip_bits(&s->gb, 8); /* transform */
1528 if (id == AV_RB32("LJIF")) {
1529 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1530 av_log(s->avctx, AV_LOG_INFO,
1531 "Pegasus lossless jpeg header found\n");
1532 skip_bits(&s->gb, 16); /* version ? */
1533 skip_bits(&s->gb, 16); /* unknown always 0? */
1534 skip_bits(&s->gb, 16); /* unknown always 0? */
1535 skip_bits(&s->gb, 16); /* unknown always 0? */
1536 switch (i=get_bits(&s->gb, 8)) {
1546 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1551 if (id == AV_RL32("colr") && len > 0) {
1552 s->colr = get_bits(&s->gb, 8);
1553 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1554 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1558 if (id == AV_RL32("xfrm") && len > 0) {
1559 s->xfrm = get_bits(&s->gb, 8);
1560 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1561 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1566 /* JPS extension by VRex */
1567 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1568 int flags, layout, type;
1569 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1570 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1572 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1573 skip_bits(&s->gb, 16); len -= 2; /* block length */
1574 skip_bits(&s->gb, 8); /* reserved */
1575 flags = get_bits(&s->gb, 8);
1576 layout = get_bits(&s->gb, 8);
1577 type = get_bits(&s->gb, 8);
1580 s->stereo3d = av_stereo3d_alloc();
1585 s->stereo3d->type = AV_STEREO3D_2D;
1586 } else if (type == 1) {
1589 s->stereo3d->type = AV_STEREO3D_LINES;
1592 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1595 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1598 if (!(flags & 0x04)) {
1599 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1606 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1607 GetByteContext gbytes;
1608 int ret, le, ifd_offset, bytes_read;
1609 const uint8_t *aligned;
1611 skip_bits(&s->gb, 16); // skip padding
1614 // init byte wise reading
1615 aligned = align_get_bits(&s->gb);
1616 bytestream2_init(&gbytes, aligned, len);
1619 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1621 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1625 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1627 // read 0th IFD and store the metadata
1628 // (return values > 0 indicate the presence of subimage metadata)
1629 ret = ff_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1631 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1635 bytes_read = bytestream2_tell(&gbytes);
1636 skip_bits(&s->gb, bytes_read << 3);
1643 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1644 id = get_bits_long(&s->gb, 32);
1647 if (id == AV_RB32("mjpg")) {
1649 skip_bits(&s->gb, 32); /* field size */
1650 skip_bits(&s->gb, 32); /* pad field size */
1651 skip_bits(&s->gb, 32); /* next off */
1652 skip_bits(&s->gb, 32); /* quant off */
1653 skip_bits(&s->gb, 32); /* huff off */
1654 skip_bits(&s->gb, 32); /* image off */
1655 skip_bits(&s->gb, 32); /* scan off */
1656 skip_bits(&s->gb, 32); /* data off */
1658 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1659 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1664 /* slow but needed for extreme adobe jpegs */
1666 av_log(s->avctx, AV_LOG_ERROR,
1667 "mjpeg: error, decode_app parser read over the end\n");
1669 skip_bits(&s->gb, 8);
1674 static int mjpeg_decode_com(MJpegDecodeContext *s)
1676 int len = get_bits(&s->gb, 16);
1677 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1678 char *cbuf = av_malloc(len - 1);
1681 for (i = 0; i < len - 2; i++)
1682 cbuf[i] = get_bits(&s->gb, 8);
1683 if (i > 0 && cbuf[i - 1] == '\n')
1688 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1689 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1691 /* buggy avid, it puts EOI only at every 10th frame */
1692 if (!strncmp(cbuf, "AVID", 4)) {
1694 if (len > 14 && cbuf[12] == 1) /* 1 - NTSC, 2 - PAL */
1695 s->interlace_polarity = 1;
1696 } else if (!strcmp(cbuf, "CS=ITU601"))
1698 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32)) ||
1699 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1709 /* return the 8 bit start code value and update the search
1710 state. Return -1 if no start code found */
1711 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1713 const uint8_t *buf_ptr;
1718 buf_ptr = *pbuf_ptr;
1719 while (buf_end - buf_ptr > 1) {
1722 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1731 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1732 *pbuf_ptr = buf_ptr;
1736 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1737 const uint8_t **buf_ptr, const uint8_t *buf_end,
1738 const uint8_t **unescaped_buf_ptr,
1739 int *unescaped_buf_size)
1742 start_code = find_marker(buf_ptr, buf_end);
1744 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1746 return AVERROR(ENOMEM);
1748 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1749 if (start_code == SOS && !s->ls) {
1750 const uint8_t *src = *buf_ptr;
1751 uint8_t *dst = s->buffer;
1753 while (src < buf_end) {
1754 uint8_t x = *(src++);
1757 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1759 while (src < buf_end && x == 0xff)
1762 if (x >= 0xd0 && x <= 0xd7)
1769 *unescaped_buf_ptr = s->buffer;
1770 *unescaped_buf_size = dst - s->buffer;
1771 memset(s->buffer + *unescaped_buf_size, 0,
1772 FF_INPUT_BUFFER_PADDING_SIZE);
1774 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1775 (buf_end - *buf_ptr) - (dst - s->buffer));
1776 } else if (start_code == SOS && s->ls) {
1777 const uint8_t *src = *buf_ptr;
1778 uint8_t *dst = s->buffer;
1784 while (src + t < buf_end) {
1785 uint8_t x = src[t++];
1787 while ((src + t < buf_end) && x == 0xff)
1796 init_put_bits(&pb, dst, t);
1798 /* unescape bitstream */
1800 uint8_t x = src[b++];
1801 put_bits(&pb, 8, x);
1804 put_bits(&pb, 7, x);
1808 flush_put_bits(&pb);
1810 *unescaped_buf_ptr = dst;
1811 *unescaped_buf_size = (bit_count + 7) >> 3;
1812 memset(s->buffer + *unescaped_buf_size, 0,
1813 FF_INPUT_BUFFER_PADDING_SIZE);
1815 *unescaped_buf_ptr = *buf_ptr;
1816 *unescaped_buf_size = buf_end - *buf_ptr;
1822 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1825 AVFrame *frame = data;
1826 const uint8_t *buf = avpkt->data;
1827 int buf_size = avpkt->size;
1828 MJpegDecodeContext *s = avctx->priv_data;
1829 const uint8_t *buf_end, *buf_ptr;
1830 const uint8_t *unescaped_buf_ptr;
1832 int unescaped_buf_size;
1837 av_dict_free(&s->exif_metadata);
1838 av_freep(&s->stereo3d);
1841 buf_end = buf + buf_size;
1842 while (buf_ptr < buf_end) {
1843 /* find start next marker */
1844 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1846 &unescaped_buf_size);
1848 if (start_code < 0) {
1850 } else if (unescaped_buf_size > INT_MAX / 8) {
1851 av_log(avctx, AV_LOG_ERROR,
1852 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1853 start_code, unescaped_buf_size, buf_size);
1854 return AVERROR_INVALIDDATA;
1856 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1857 start_code, buf_end - buf_ptr);
1859 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
1862 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
1866 s->start_code = start_code;
1867 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1868 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1870 /* process markers */
1871 if (start_code >= 0xd0 && start_code <= 0xd7)
1872 av_log(avctx, AV_LOG_DEBUG,
1873 "restart marker: %d\n", start_code & 0x0f);
1875 else if (start_code >= APP0 && start_code <= APP15)
1876 mjpeg_decode_app(s);
1878 else if (start_code == COM)
1879 mjpeg_decode_com(s);
1883 if (!CONFIG_JPEGLS_DECODER &&
1884 (start_code == SOF48 || start_code == LSE)) {
1885 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
1886 return AVERROR(ENOSYS);
1889 switch (start_code) {
1891 s->restart_interval = 0;
1892 s->restart_count = 0;
1893 /* nothing to do on SOI */
1896 ff_mjpeg_decode_dqt(s);
1899 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1900 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1909 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1916 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1923 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1930 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1934 if (!CONFIG_JPEGLS_DECODER ||
1935 (ret = ff_jpegls_decode_lse(s)) < 0)
1941 if (!s->got_picture) {
1942 av_log(avctx, AV_LOG_WARNING,
1943 "Found EOI before any SOF, ignoring\n");
1946 if (s->interlaced) {
1947 s->bottom_field ^= 1;
1948 /* if not bottom field, do not output image yet */
1949 if (s->bottom_field == !s->interlace_polarity)
1952 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
1958 int qp = FFMAX3(s->qscale[0],
1961 int qpw = (s->width + 15) / 16;
1962 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
1964 memset(qp_table_buf->data, qp, qpw);
1965 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
1968 if(avctx->debug & FF_DEBUG_QP)
1969 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
1975 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
1976 (avctx->err_recognition & AV_EF_EXPLODE))
1980 mjpeg_decode_dri(s);
1992 av_log(avctx, AV_LOG_ERROR,
1993 "mjpeg: unsupported coding type (%x)\n", start_code);
1997 /* eof process start code */
1998 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1999 av_log(avctx, AV_LOG_DEBUG,
2000 "marker parser used %d bytes (%d bits)\n",
2001 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2003 if (s->got_picture && s->cur_scan) {
2004 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2007 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2008 return AVERROR_INVALIDDATA;
2014 uint8_t *line = s->picture_ptr->data[s->upscale_h];
2015 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2016 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2017 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2018 avctx->pix_fmt == AV_PIX_FMT_YUV440P);
2019 for (i = 0; i < s->chroma_height; i++) {
2020 for (index = s->width - 1; index; index--)
2021 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2022 line += s->linesize[s->upscale_h];
2026 uint8_t *dst = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(s->height - 1) * s->linesize[s->upscale_v]];
2028 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2029 w = s->width >> hshift;
2030 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2031 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2032 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2033 avctx->pix_fmt == AV_PIX_FMT_YUV422P);
2034 for (i = s->height - 1; i; i--) {
2035 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[i / 2 * s->linesize[s->upscale_v]];
2036 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(i + 1) / 2 * s->linesize[s->upscale_v]];
2038 memcpy(dst, src1, w);
2040 for (index = 0; index < w; index++)
2041 dst[index] = (src1[index] + src2[index]) >> 1;
2043 dst -= s->linesize[s->upscale_v];
2048 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2049 for (index=0; index<4; index++) {
2050 uint8_t *dst = s->picture_ptr->data[index];
2051 int w = s->picture_ptr->width;
2052 int h = s->picture_ptr->height;
2053 if(index && index<3){
2054 w = FF_CEIL_RSHIFT(w, hshift);
2055 h = FF_CEIL_RSHIFT(h, vshift);
2058 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2059 for (i=0; i<h/2; i++) {
2061 FFSWAP(int, dst[j], dst2[j]);
2062 dst += s->picture_ptr->linesize[index];
2063 dst2 -= s->picture_ptr->linesize[index];
2070 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2072 stereo->type = s->stereo3d->type;
2073 stereo->flags = s->stereo3d->flags;
2075 av_freep(&s->stereo3d);
2078 av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
2079 av_dict_free(&s->exif_metadata);
2081 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %td bytes\n",
2083 // return buf_end - buf_ptr;
2084 return buf_ptr - buf;
2087 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2089 MJpegDecodeContext *s = avctx->priv_data;
2092 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2093 av_log(avctx, AV_LOG_INFO, "Single field\n");
2097 av_frame_free(&s->picture);
2098 s->picture_ptr = NULL;
2099 } else if (s->picture_ptr)
2100 av_frame_unref(s->picture_ptr);
2102 av_freep(&s->buffer);
2103 av_freep(&s->stereo3d);
2104 av_freep(&s->ljpeg_buffer);
2105 s->ljpeg_buffer_size = 0;
2107 for (i = 0; i < 3; i++) {
2108 for (j = 0; j < 4; j++)
2109 ff_free_vlc(&s->vlcs[i][j]);
2111 for (i = 0; i < MAX_COMPONENTS; i++) {
2112 av_freep(&s->blocks[i]);
2113 av_freep(&s->last_nnz[i]);
2115 av_dict_free(&s->exif_metadata);
2119 static void decode_flush(AVCodecContext *avctx)
2121 MJpegDecodeContext *s = avctx->priv_data;
2125 #if CONFIG_MJPEG_DECODER
2126 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2127 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2128 static const AVOption options[] = {
2129 { "extern_huff", "Use external huffman table.",
2130 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
2134 static const AVClass mjpegdec_class = {
2135 .class_name = "MJPEG decoder",
2136 .item_name = av_default_item_name,
2138 .version = LIBAVUTIL_VERSION_INT,
2141 AVCodec ff_mjpeg_decoder = {
2143 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2144 .type = AVMEDIA_TYPE_VIDEO,
2145 .id = AV_CODEC_ID_MJPEG,
2146 .priv_data_size = sizeof(MJpegDecodeContext),
2147 .init = ff_mjpeg_decode_init,
2148 .close = ff_mjpeg_decode_end,
2149 .decode = ff_mjpeg_decode_frame,
2150 .flush = decode_flush,
2151 .capabilities = CODEC_CAP_DR1,
2153 .priv_class = &mjpegdec_class,
2156 #if CONFIG_THP_DECODER
2157 AVCodec ff_thp_decoder = {
2159 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2160 .type = AVMEDIA_TYPE_VIDEO,
2161 .id = AV_CODEC_ID_THP,
2162 .priv_data_size = sizeof(MJpegDecodeContext),
2163 .init = ff_mjpeg_decode_init,
2164 .close = ff_mjpeg_decode_end,
2165 .decode = ff_mjpeg_decode_frame,
2166 .flush = decode_flush,
2167 .capabilities = CODEC_CAP_DR1,