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 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
45 const uint8_t *val_table, int nb_codes,
46 int use_static, int is_ac)
48 uint8_t huff_size[256] = { 0 };
49 uint16_t huff_code[256];
50 uint16_t huff_sym[256];
53 av_assert0(nb_codes <= 256);
55 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
57 for (i = 0; i < 256; i++)
58 huff_sym[i] = i + 16 * is_ac;
61 huff_sym[0] = 16 * 256;
63 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
64 huff_code, 2, 2, huff_sym, 2, 2, use_static);
67 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
69 build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
70 avpriv_mjpeg_val_dc, 12, 0, 0);
71 build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
72 avpriv_mjpeg_val_dc, 12, 0, 0);
73 build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
74 avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
75 build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
76 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
77 build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
78 avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
79 build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
80 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
83 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
85 MJpegDecodeContext *s = avctx->priv_data;
88 s->picture_ptr = &s->picture;
89 avcodec_get_frame_defaults(&s->picture);
92 ff_hpeldsp_init(&s->hdsp, avctx->flags);
93 ff_dsputil_init(&s->dsp, avctx);
94 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
100 s->org_height = avctx->coded_height;
101 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
103 build_basic_mjpeg_vlc(s);
105 if (s->extern_huff) {
106 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
107 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
108 if (ff_mjpeg_decode_dht(s)) {
109 av_log(avctx, AV_LOG_ERROR,
110 "error using external huffman table, switching back to internal\n");
111 build_basic_mjpeg_vlc(s);
114 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
115 s->interlace_polarity = 1; /* bottom field first */
116 av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
118 if (avctx->codec->id == AV_CODEC_ID_AMV)
125 /* quantize tables */
126 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
128 int len, index, i, j;
130 len = get_bits(&s->gb, 16) - 2;
133 int pr = get_bits(&s->gb, 4);
135 av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
136 return AVERROR_INVALIDDATA;
138 index = get_bits(&s->gb, 4);
141 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
142 /* read quant table */
143 for (i = 0; i < 64; i++) {
144 j = s->scantable.permutated[i];
145 s->quant_matrixes[index][j] = get_bits(&s->gb, pr ? 16 : 8);
148 // XXX FIXME finetune, and perhaps add dc too
149 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
150 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
151 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
152 index, s->qscale[index]);
158 /* decode huffman tables and build VLC decoders */
159 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
161 int len, index, i, class, n, v, code_max;
162 uint8_t bits_table[17];
163 uint8_t val_table[256];
166 len = get_bits(&s->gb, 16) - 2;
170 return AVERROR_INVALIDDATA;
171 class = get_bits(&s->gb, 4);
173 return AVERROR_INVALIDDATA;
174 index = get_bits(&s->gb, 4);
176 return AVERROR_INVALIDDATA;
178 for (i = 1; i <= 16; i++) {
179 bits_table[i] = get_bits(&s->gb, 8);
183 if (len < n || n > 256)
184 return AVERROR_INVALIDDATA;
187 for (i = 0; i < n; i++) {
188 v = get_bits(&s->gb, 8);
195 /* build VLC and flush previous vlc if present */
196 ff_free_vlc(&s->vlcs[class][index]);
197 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
198 class, index, code_max + 1);
199 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
200 code_max + 1, 0, class > 0)) < 0)
204 ff_free_vlc(&s->vlcs[2][index]);
205 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
206 code_max + 1, 0, 0)) < 0)
213 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
215 int len, nb_components, i, width, height, pix_fmt_id;
216 int h_count[MAX_COMPONENTS];
217 int v_count[MAX_COMPONENTS];
220 s->upscale_h = s->upscale_v = 0;
222 /* XXX: verify len field validity */
223 len = get_bits(&s->gb, 16);
224 s->bits = get_bits(&s->gb, 8);
228 if (s->bits == 9 && !s->pegasus_rct)
229 s->rct = 1; // FIXME ugly
231 if (s->bits != 8 && !s->lossless) {
232 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
236 if(s->lossless && s->avctx->lowres){
237 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
241 height = get_bits(&s->gb, 16);
242 width = get_bits(&s->gb, 16);
244 // HACK for odd_height.mov
245 if (s->interlaced && s->width == width && s->height == height + 1)
248 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
249 if (av_image_check_size(width, height, 0, s->avctx))
250 return AVERROR_INVALIDDATA;
252 nb_components = get_bits(&s->gb, 8);
253 if (nb_components <= 0 ||
254 nb_components > MAX_COMPONENTS)
256 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
257 if (nb_components != s->nb_components) {
258 av_log(s->avctx, AV_LOG_ERROR, "nb_components changing in interlaced picture\n");
259 return AVERROR_INVALIDDATA;
262 if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
263 avpriv_report_missing_feature(s->avctx,
264 "JPEG-LS that is not <= 8 "
265 "bits/component or 16-bit gray");
266 return AVERROR_PATCHWELCOME;
268 s->nb_components = nb_components;
271 memset(h_count, 0, sizeof(h_count));
272 memset(v_count, 0, sizeof(v_count));
273 for (i = 0; i < nb_components; i++) {
275 s->component_id[i] = get_bits(&s->gb, 8) - 1;
276 h_count[i] = get_bits(&s->gb, 4);
277 v_count[i] = get_bits(&s->gb, 4);
278 /* compute hmax and vmax (only used in interleaved case) */
279 if (h_count[i] > s->h_max)
280 s->h_max = h_count[i];
281 if (v_count[i] > s->v_max)
282 s->v_max = v_count[i];
283 if (!h_count[i] || !v_count[i]) {
284 av_log(s->avctx, AV_LOG_ERROR, "h/v_count is 0\n");
287 s->quant_index[i] = get_bits(&s->gb, 8);
288 if (s->quant_index[i] >= 4) {
289 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
290 return AVERROR_INVALIDDATA;
292 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
293 i, h_count[i], v_count[i],
294 s->component_id[i], s->quant_index[i]);
297 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
298 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
299 return AVERROR_PATCHWELCOME;
303 /* if different size, realloc/alloc picture */
304 if ( width != s->width || height != s->height
305 || memcmp(s->h_count, h_count, sizeof(h_count))
306 || memcmp(s->v_count, v_count, sizeof(v_count))) {
310 memcpy(s->h_count, h_count, sizeof(h_count));
311 memcpy(s->v_count, v_count, sizeof(v_count));
315 /* test interlaced mode */
316 if (s->first_picture &&
317 s->org_height != 0 &&
318 s->height < ((s->org_height * 3) / 4)) {
320 s->bottom_field = s->interlace_polarity;
321 s->picture_ptr->interlaced_frame = 1;
322 s->picture_ptr->top_field_first = !s->interlace_polarity;
326 avcodec_set_dimensions(s->avctx, width, height);
328 s->first_picture = 0;
331 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
332 if (s->progressive) {
333 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
334 return AVERROR_INVALIDDATA;
337 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && nb_components==3)
339 else if (!s->lossless)
341 /* XXX: not complete test ! */
342 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
343 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
344 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
345 (s->h_count[3] << 4) | s->v_count[3];
346 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
347 /* NOTE we do not allocate pictures large enough for the possible
348 * padding of h/v_count being 4 */
349 if (!(pix_fmt_id & 0xD0D0D0D0))
350 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
351 if (!(pix_fmt_id & 0x0D0D0D0D))
352 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
354 switch (pix_fmt_id) {
357 s->avctx->pix_fmt = AV_PIX_FMT_BGR24;
359 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
360 s->avctx->pix_fmt = AV_PIX_FMT_GBR24P;
362 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
363 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
366 av_assert0(s->nb_components == 3);
370 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
371 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
373 s->upscale_h = (pix_fmt_id == 0x22122100);
374 s->chroma_height = s->height;
378 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
379 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
380 s->upscale_v = (pix_fmt_id == 0x22211200);
382 s->chroma_height = s->height;
385 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
386 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
389 s->chroma_height = s->height / 2;
401 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
403 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
408 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
409 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
410 s->upscale_h = (pix_fmt_id == 0x22211100) * 2 + (pix_fmt_id == 0x22112100);
411 s->chroma_height = s->height / 2;
414 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
415 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
419 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
420 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
421 s->upscale_v = (pix_fmt_id == 0x22121100) + 1;
424 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
425 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
428 s->avctx->pix_fmt = AV_PIX_FMT_YUV411P;
429 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
432 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
433 return AVERROR_PATCHWELCOME;
435 if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
436 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
437 return AVERROR_PATCHWELCOME;
440 s->upscale_h = s->upscale_v = 0;
441 if (s->nb_components > 1)
442 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
443 else if (s->bits <= 8)
444 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
446 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
449 av_frame_unref(s->picture_ptr);
450 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
452 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
453 s->picture_ptr->key_frame = 1;
456 for (i = 0; i < 3; i++)
457 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
459 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
460 s->width, s->height, s->linesize[0], s->linesize[1],
461 s->interlaced, s->avctx->height);
463 if (len != (8 + (3 * nb_components)))
464 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
467 if (s->rgb && !s->lossless && !s->ls) {
468 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
469 return AVERROR_PATCHWELCOME;
472 /* totally blank picture as progressive JPEG will only add details to it */
473 if (s->progressive) {
474 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
475 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
476 for (i = 0; i < s->nb_components; i++) {
477 int size = bw * bh * s->h_count[i] * s->v_count[i];
478 av_freep(&s->blocks[i]);
479 av_freep(&s->last_nnz[i]);
480 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
481 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
482 s->block_stride[i] = bw * s->h_count[i];
484 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
489 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
492 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
494 av_log(s->avctx, AV_LOG_WARNING,
495 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
496 0, dc_index, &s->vlcs[0][dc_index]);
501 return get_xbits(&s->gb, code);
506 /* decode block and dequantize */
507 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
508 int dc_index, int ac_index, int16_t *quant_matrix)
510 int code, i, j, level, val;
513 val = mjpeg_decode_dc(s, dc_index);
515 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
516 return AVERROR_INVALIDDATA;
518 val = val * quant_matrix[0] + s->last_dc[component];
519 s->last_dc[component] = val;
523 {OPEN_READER(re, &s->gb);
525 UPDATE_CACHE(re, &s->gb);
526 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
528 i += ((unsigned)code) >> 4;
531 if (code > MIN_CACHE_BITS - 16)
532 UPDATE_CACHE(re, &s->gb);
535 int cache = GET_CACHE(re, &s->gb);
536 int sign = (~cache) >> 31;
537 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
540 LAST_SKIP_BITS(re, &s->gb, code);
543 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
544 return AVERROR_INVALIDDATA;
546 j = s->scantable.permutated[i];
547 block[j] = level * quant_matrix[j];
550 CLOSE_READER(re, &s->gb);}
555 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
556 int component, int dc_index,
557 int16_t *quant_matrix, int Al)
560 s->dsp.clear_block(block);
561 val = mjpeg_decode_dc(s, dc_index);
563 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
564 return AVERROR_INVALIDDATA;
566 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
567 s->last_dc[component] = val;
572 /* decode block and dequantize - progressive JPEG version */
573 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
574 uint8_t *last_nnz, int ac_index,
575 int16_t *quant_matrix,
576 int ss, int se, int Al, int *EOBRUN)
578 int code, i, j, level, val, run;
586 OPEN_READER(re, &s->gb);
587 for (i = ss; ; i++) {
588 UPDATE_CACHE(re, &s->gb);
589 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
591 run = ((unsigned) code) >> 4;
595 if (code > MIN_CACHE_BITS - 16)
596 UPDATE_CACHE(re, &s->gb);
599 int cache = GET_CACHE(re, &s->gb);
600 int sign = (~cache) >> 31;
601 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
604 LAST_SKIP_BITS(re, &s->gb, code);
608 j = s->scantable.permutated[se];
609 block[j] = level * quant_matrix[j] << Al;
612 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
613 return AVERROR_INVALIDDATA;
615 j = s->scantable.permutated[i];
616 block[j] = level * quant_matrix[j] << Al;
618 if (run == 0xF) {// ZRL - skip 15 coefficients
621 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
622 return AVERROR_INVALIDDATA;
627 UPDATE_CACHE(re, &s->gb);
628 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
629 LAST_SKIP_BITS(re, &s->gb, run);
636 CLOSE_READER(re, &s->gb);
645 #define REFINE_BIT(j) { \
646 UPDATE_CACHE(re, &s->gb); \
647 sign = block[j] >> 15; \
648 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
649 ((quant_matrix[j] ^ sign) - sign) << Al; \
650 LAST_SKIP_BITS(re, &s->gb, 1); \
658 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
663 j = s->scantable.permutated[i]; \
666 else if (run-- == 0) \
670 /* decode block and dequantize - progressive JPEG refinement pass */
671 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
673 int ac_index, int16_t *quant_matrix,
674 int ss, int se, int Al, int *EOBRUN)
676 int code, i = ss, j, sign, val, run;
677 int last = FFMIN(se, *last_nnz);
679 OPEN_READER(re, &s->gb);
684 UPDATE_CACHE(re, &s->gb);
685 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
688 run = ((unsigned) code) >> 4;
689 UPDATE_CACHE(re, &s->gb);
690 val = SHOW_UBITS(re, &s->gb, 1);
691 LAST_SKIP_BITS(re, &s->gb, 1);
693 j = s->scantable.permutated[i];
695 block[j] = ((quant_matrix[j]^val) - val) << Al;
699 CLOSE_READER(re, &s->gb);
703 run = ((unsigned) code) >> 4;
710 UPDATE_CACHE(re, &s->gb);
711 run += SHOW_UBITS(re, &s->gb, val);
712 LAST_SKIP_BITS(re, &s->gb, val);
724 for (; i <= last; i++) {
725 j = s->scantable.permutated[i];
729 CLOSE_READER(re, &s->gb);
736 static void handle_rstn(MJpegDecodeContext *s, int nb_components)
739 if (s->restart_interval) {
741 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
742 align_get_bits(&s->gb);
743 for (i = 0; i < nb_components; i++) /* reset dc */
744 s->last_dc[i] = 1024;
747 i = 8 + ((-get_bits_count(&s->gb)) & 7);
749 if (s->restart_count == 0) {
750 if( show_bits(&s->gb, i) == (1 << i) - 1
751 || show_bits(&s->gb, i) == 0xFF) {
752 int pos = get_bits_count(&s->gb);
753 align_get_bits(&s->gb);
754 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
755 skip_bits(&s->gb, 8);
756 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
757 for (i = 0; i < nb_components; i++) /* reset dc */
758 s->last_dc[i] = 1024;
760 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
766 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
769 uint16_t (*buffer)[4];
770 int left[3], top[3], topleft[3];
771 const int linesize = s->linesize[0];
772 const int mask = (1 << s->bits) - 1;
776 s->restart_count = s->restart_interval;
778 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
779 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
780 buffer = s->ljpeg_buffer;
782 for (i = 0; i < 3; i++)
783 buffer[0][i] = 1 << (s->bits - 1);
785 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
786 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
788 if (s->interlaced && s->bottom_field)
789 ptr += linesize >> 1;
791 for (i = 0; i < 3; i++)
792 top[i] = left[i] = topleft[i] = buffer[0][i];
794 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
795 int modified_predictor = predictor;
797 if (s->restart_interval && !s->restart_count){
798 s->restart_count = s->restart_interval;
802 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
804 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
805 modified_predictor = 1;
807 for (i=0;i<nb_components;i++) {
811 top[i] = buffer[mb_x][i];
813 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
815 dc = mjpeg_decode_dc(s, s->dc_index[i]);
819 left[i] = buffer[mb_x][i] =
820 mask & (pred + (dc << point_transform));
823 if (s->restart_interval && !--s->restart_count) {
824 align_get_bits(&s->gb);
825 skip_bits(&s->gb, 16); /* skip RSTn */
830 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
831 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
832 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
833 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
835 } else if (s->pegasus_rct) {
836 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
837 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
838 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
839 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
842 for(i=0; i<nb_components; i++) {
843 int c= s->comp_index[i];
844 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
845 ptr[3*mb_x+2-c] = buffer[mb_x][i];
853 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int nb_components, int predictor,
857 int bits= (s->bits+7)&~7;
861 point_transform += bits - s->bits;
863 av_assert0(nb_components>=1 && nb_components<=3);
865 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
866 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
867 if (s->restart_interval && !s->restart_count){
868 s->restart_count = s->restart_interval;
873 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
874 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
875 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
876 for (i = 0; i < nb_components; i++) {
879 int n, h, v, x, y, c, j, linesize;
881 c = s->comp_index[i];
886 linesize= s->linesize[c];
888 if(bits>8) linesize /= 2;
893 dc = mjpeg_decode_dc(s, s->dc_index[i]);
897 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
900 pred= 1 << (bits - 1);
906 pred= ptr[-linesize];
908 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
912 if (s->interlaced && s->bottom_field)
913 ptr += linesize >> 1;
914 pred &= (-1)<<(8-s->bits);
915 *ptr= pred + (dc << point_transform);
917 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
920 pred= 1 << (bits - 1);
926 pred= ptr16[-linesize];
928 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
932 if (s->interlaced && s->bottom_field)
933 ptr16 += linesize >> 1;
934 pred &= (-1)<<(16-s->bits);
935 *ptr16= pred + (dc << point_transform);
944 for (i = 0; i < nb_components; i++) {
947 int n, h, v, x, y, c, j, linesize, dc;
949 c = s->comp_index[i];
954 linesize = s->linesize[c];
956 if(bits>8) linesize /= 2;
958 for (j = 0; j < n; j++) {
961 dc = mjpeg_decode_dc(s, s->dc_index[i]);
965 ptr = s->picture.data[c] +
966 (linesize * (v * mb_y + y)) +
967 (h * mb_x + x); //FIXME optimize this crap
968 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
970 pred &= (-1)<<(8-s->bits);
971 *ptr = pred + (dc << point_transform);
973 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
974 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
976 pred &= (-1)<<(16-s->bits);
977 *ptr16= pred + (dc << point_transform);
987 if (s->restart_interval && !--s->restart_count) {
988 align_get_bits(&s->gb);
989 skip_bits(&s->gb, 16); /* skip RSTn */
996 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
997 uint8_t *dst, const uint8_t *src,
998 int linesize, int lowres)
1001 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1003 case 1: copy_block4(dst, src, linesize, linesize, 4);
1005 case 2: copy_block2(dst, src, linesize, linesize, 2);
1007 case 3: *dst = *src;
1012 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1013 int Al, const uint8_t *mb_bitmask,
1014 const AVFrame *reference)
1017 uint8_t *data[MAX_COMPONENTS];
1018 const uint8_t *reference_data[MAX_COMPONENTS];
1019 int linesize[MAX_COMPONENTS];
1020 GetBitContext mb_bitmask_gb;
1023 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1025 if (s->flipped && s->avctx->lowres) {
1026 av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with lowres\n");
1030 for (i = 0; i < nb_components; i++) {
1031 int c = s->comp_index[i];
1032 data[c] = s->picture_ptr->data[c];
1033 reference_data[c] = reference ? reference->data[c] : NULL;
1034 linesize[c] = s->linesize[c];
1035 s->coefs_finished[c] |= 1;
1036 if (s->flipped && !(s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
1037 // picture should be flipped upside-down for this codec
1038 int offset = (linesize[c] * (s->v_scount[i] *
1039 (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
1041 reference_data[c] += offset;
1046 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1047 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1048 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1050 if (s->restart_interval && !s->restart_count)
1051 s->restart_count = s->restart_interval;
1053 if (get_bits_left(&s->gb) < 0) {
1054 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1055 -get_bits_left(&s->gb));
1056 return AVERROR_INVALIDDATA;
1058 for (i = 0; i < nb_components; i++) {
1060 int n, h, v, x, y, c, j;
1062 n = s->nb_blocks[i];
1063 c = s->comp_index[i];
1068 for (j = 0; j < n; j++) {
1069 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1070 (h * mb_x + x) * 8) >> s->avctx->lowres);
1072 if (s->interlaced && s->bottom_field)
1073 block_offset += linesize[c] >> 1;
1074 ptr = data[c] + block_offset;
1075 if (!s->progressive) {
1077 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1078 linesize[c], s->avctx->lowres);
1081 s->dsp.clear_block(s->block);
1082 if (decode_block(s, s->block, i,
1083 s->dc_index[i], s->ac_index[i],
1084 s->quant_matrixes[s->quant_index[c]]) < 0) {
1085 av_log(s->avctx, AV_LOG_ERROR,
1086 "error y=%d x=%d\n", mb_y, mb_x);
1087 return AVERROR_INVALIDDATA;
1089 s->dsp.idct_put(ptr, linesize[c], s->block);
1092 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1094 int16_t *block = s->blocks[c][block_idx];
1096 block[0] += get_bits1(&s->gb) *
1097 s->quant_matrixes[s->quant_index[c]][0] << Al;
1098 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1099 s->quant_matrixes[s->quant_index[c]],
1101 av_log(s->avctx, AV_LOG_ERROR,
1102 "error y=%d x=%d\n", mb_y, mb_x);
1103 return AVERROR_INVALIDDATA;
1106 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1107 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1108 mb_x, mb_y, x, y, c, s->bottom_field,
1109 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1117 handle_rstn(s, nb_components);
1123 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1124 int se, int Ah, int Al)
1128 int c = s->comp_index[0];
1129 uint8_t *data = s->picture.data[c];
1130 int linesize = s->linesize[c];
1132 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
1135 av_log(s->avctx, AV_LOG_ERROR, "SE %d is too large\n", se);
1136 return AVERROR_INVALIDDATA;
1140 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
1141 last_scan = !~s->coefs_finished[c];
1144 if (s->interlaced && s->bottom_field)
1145 data += linesize >> 1;
1147 s->restart_count = 0;
1149 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1150 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1151 int block_idx = mb_y * s->block_stride[c];
1152 int16_t (*block)[64] = &s->blocks[c][block_idx];
1153 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1154 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1156 if (s->restart_interval && !s->restart_count)
1157 s->restart_count = s->restart_interval;
1160 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1161 quant_matrix, ss, se, Al, &EOBRUN);
1163 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1164 quant_matrix, ss, se, Al, &EOBRUN);
1166 av_log(s->avctx, AV_LOG_ERROR,
1167 "error y=%d x=%d\n", mb_y, mb_x);
1168 return AVERROR_INVALIDDATA;
1172 s->dsp.idct_put(ptr, linesize, *block);
1173 ptr += 8 >> s->avctx->lowres;
1181 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1182 const AVFrame *reference)
1184 int len, nb_components, i, h, v, predictor, point_transform;
1186 const int block_size = s->lossless ? 1 : 8;
1187 int ilv, prev_shift;
1189 if (!s->got_picture) {
1190 av_log(s->avctx, AV_LOG_WARNING,
1191 "Can not process SOS before SOF, skipping\n");
1195 av_assert0(s->picture_ptr->data[0]);
1196 /* XXX: verify len field validity */
1197 len = get_bits(&s->gb, 16);
1198 nb_components = get_bits(&s->gb, 8);
1199 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1200 av_log(s->avctx, AV_LOG_ERROR,
1201 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1202 return AVERROR_PATCHWELCOME;
1204 if (len != 6 + 2 * nb_components) {
1205 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1206 return AVERROR_INVALIDDATA;
1208 for (i = 0; i < nb_components; i++) {
1209 id = get_bits(&s->gb, 8) - 1;
1210 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1211 /* find component index */
1212 for (index = 0; index < s->nb_components; index++)
1213 if (id == s->component_id[index])
1215 if (index == s->nb_components) {
1216 av_log(s->avctx, AV_LOG_ERROR,
1217 "decode_sos: index(%d) out of components\n", index);
1218 return AVERROR_INVALIDDATA;
1220 /* Metasoft MJPEG codec has Cb and Cr swapped */
1221 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1222 && nb_components == 3 && s->nb_components == 3 && i)
1225 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1227 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1228 index = (index+2)%3;
1230 s->comp_index[i] = index;
1232 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1233 s->h_scount[i] = s->h_count[index];
1234 s->v_scount[i] = s->v_count[index];
1236 s->dc_index[i] = get_bits(&s->gb, 4);
1237 s->ac_index[i] = get_bits(&s->gb, 4);
1239 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1240 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1242 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))
1246 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1247 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1248 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1249 prev_shift = get_bits(&s->gb, 4); /* Ah */
1250 point_transform = get_bits(&s->gb, 4); /* Al */
1252 prev_shift = point_transform = 0;
1254 if (nb_components > 1) {
1255 /* interleaved stream */
1256 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1257 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1258 } else if (!s->ls) { /* skip this for JPEG-LS */
1259 h = s->h_max / s->h_scount[0];
1260 v = s->v_max / s->v_scount[0];
1261 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1262 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1263 s->nb_blocks[0] = 1;
1268 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1269 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1270 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1271 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1272 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1275 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1276 for (i = s->mjpb_skiptosod; i > 0; i--)
1277 skip_bits(&s->gb, 8);
1280 for (i = 0; i < nb_components; i++)
1281 s->last_dc[i] = 1024;
1284 av_assert0(s->picture_ptr == &s->picture);
1285 if (CONFIG_JPEGLS_DECODER && s->ls) {
1287 // reset_ls_coding_parameters(s, 0);
1289 if ((ret = ff_jpegls_decode_picture(s, predictor,
1290 point_transform, ilv)) < 0)
1294 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1297 if ((ret = ljpeg_decode_yuv_scan(s, nb_components, predictor, point_transform)) < 0)
1302 if (s->progressive && predictor) {
1303 av_assert0(s->picture_ptr == &s->picture);
1304 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1306 point_transform)) < 0)
1309 if ((ret = mjpeg_decode_scan(s, nb_components,
1310 prev_shift, point_transform,
1311 mb_bitmask, reference)) < 0)
1316 if (s->interlaced &&
1317 get_bits_left(&s->gb) > 32 &&
1318 show_bits(&s->gb, 8) == 0xFF) {
1319 GetBitContext bak = s->gb;
1320 align_get_bits(&bak);
1321 if (show_bits(&bak, 16) == 0xFFD1) {
1322 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1324 skip_bits(&s->gb, 16);
1325 s->bottom_field ^= 1;
1334 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1335 return AVERROR_INVALIDDATA;
1338 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1340 if (get_bits(&s->gb, 16) != 4)
1341 return AVERROR_INVALIDDATA;
1342 s->restart_interval = get_bits(&s->gb, 16);
1343 s->restart_count = 0;
1344 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1345 s->restart_interval);
1350 static int mjpeg_decode_app(MJpegDecodeContext *s)
1354 len = get_bits(&s->gb, 16);
1356 return AVERROR_INVALIDDATA;
1357 if (8 * len > get_bits_left(&s->gb))
1358 return AVERROR_INVALIDDATA;
1360 id = get_bits_long(&s->gb, 32);
1363 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1364 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1366 /* Buggy AVID, it puts EOI only at every 10th frame. */
1367 /* Also, this fourcc is used by non-avid files too, it holds some
1368 information, but it's always present in AVID-created files. */
1369 if (id == AV_RB32("AVI1")) {
1375 4bytes field_size_less_padding
1378 i = get_bits(&s->gb, 8); len--;
1379 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1381 skip_bits(&s->gb, 8);
1382 skip_bits(&s->gb, 32);
1383 skip_bits(&s->gb, 32);
1391 if (id == AV_RB32("JFIF")) {
1392 int t_w, t_h, v1, v2;
1393 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1394 v1 = get_bits(&s->gb, 8);
1395 v2 = get_bits(&s->gb, 8);
1396 skip_bits(&s->gb, 8);
1398 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1399 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1401 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1402 av_log(s->avctx, AV_LOG_INFO,
1403 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1405 s->avctx->sample_aspect_ratio.num,
1406 s->avctx->sample_aspect_ratio.den);
1408 t_w = get_bits(&s->gb, 8);
1409 t_h = get_bits(&s->gb, 8);
1411 /* skip thumbnail */
1412 if (len -10 - (t_w * t_h * 3) > 0)
1413 len -= t_w * t_h * 3;
1419 if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1420 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1421 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1422 skip_bits(&s->gb, 16); /* version */
1423 skip_bits(&s->gb, 16); /* flags0 */
1424 skip_bits(&s->gb, 16); /* flags1 */
1425 skip_bits(&s->gb, 8); /* transform */
1430 if (id == AV_RB32("LJIF")) {
1431 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1432 av_log(s->avctx, AV_LOG_INFO,
1433 "Pegasus lossless jpeg header found\n");
1434 skip_bits(&s->gb, 16); /* version ? */
1435 skip_bits(&s->gb, 16); /* unknown always 0? */
1436 skip_bits(&s->gb, 16); /* unknown always 0? */
1437 skip_bits(&s->gb, 16); /* unknown always 0? */
1438 switch (get_bits(&s->gb, 8)) {
1448 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1455 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1456 id = get_bits_long(&s->gb, 32);
1459 if (id == AV_RB32("mjpg")) {
1461 skip_bits(&s->gb, 32); /* field size */
1462 skip_bits(&s->gb, 32); /* pad field size */
1463 skip_bits(&s->gb, 32); /* next off */
1464 skip_bits(&s->gb, 32); /* quant off */
1465 skip_bits(&s->gb, 32); /* huff off */
1466 skip_bits(&s->gb, 32); /* image off */
1467 skip_bits(&s->gb, 32); /* scan off */
1468 skip_bits(&s->gb, 32); /* data off */
1470 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1471 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1476 /* slow but needed for extreme adobe jpegs */
1478 av_log(s->avctx, AV_LOG_ERROR,
1479 "mjpeg: error, decode_app parser read over the end\n");
1481 skip_bits(&s->gb, 8);
1486 static int mjpeg_decode_com(MJpegDecodeContext *s)
1488 int len = get_bits(&s->gb, 16);
1489 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1490 char *cbuf = av_malloc(len - 1);
1493 for (i = 0; i < len - 2; i++)
1494 cbuf[i] = get_bits(&s->gb, 8);
1495 if (i > 0 && cbuf[i - 1] == '\n')
1500 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1501 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1503 /* buggy avid, it puts EOI only at every 10th frame */
1504 if (!strcmp(cbuf, "AVID")) {
1506 } else if (!strcmp(cbuf, "CS=ITU601"))
1508 else if ((len > 31 && !strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32)) ||
1509 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1519 /* return the 8 bit start code value and update the search
1520 state. Return -1 if no start code found */
1521 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1523 const uint8_t *buf_ptr;
1528 buf_ptr = *pbuf_ptr;
1529 while (buf_ptr < buf_end) {
1532 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1540 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1541 *pbuf_ptr = buf_ptr;
1545 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1546 const uint8_t **buf_ptr, const uint8_t *buf_end,
1547 const uint8_t **unescaped_buf_ptr,
1548 int *unescaped_buf_size)
1551 start_code = find_marker(buf_ptr, buf_end);
1553 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1555 return AVERROR(ENOMEM);
1557 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1558 if (start_code == SOS && !s->ls) {
1559 const uint8_t *src = *buf_ptr;
1560 uint8_t *dst = s->buffer;
1562 while (src < buf_end) {
1563 uint8_t x = *(src++);
1566 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1568 while (src < buf_end && x == 0xff)
1571 if (x >= 0xd0 && x <= 0xd7)
1578 *unescaped_buf_ptr = s->buffer;
1579 *unescaped_buf_size = dst - s->buffer;
1580 memset(s->buffer + *unescaped_buf_size, 0,
1581 FF_INPUT_BUFFER_PADDING_SIZE);
1583 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1584 (buf_end - *buf_ptr) - (dst - s->buffer));
1585 } else if (start_code == SOS && s->ls) {
1586 const uint8_t *src = *buf_ptr;
1587 uint8_t *dst = s->buffer;
1595 while (src + t < buf_end) {
1596 uint8_t x = src[t++];
1598 while ((src + t < buf_end) && x == 0xff)
1607 init_put_bits(&pb, dst, t);
1609 /* unescape bitstream */
1611 uint8_t x = src[b++];
1612 put_bits(&pb, 8, x);
1615 put_bits(&pb, 7, x);
1619 flush_put_bits(&pb);
1621 *unescaped_buf_ptr = dst;
1622 *unescaped_buf_size = (bit_count + 7) >> 3;
1623 memset(s->buffer + *unescaped_buf_size, 0,
1624 FF_INPUT_BUFFER_PADDING_SIZE);
1626 *unescaped_buf_ptr = *buf_ptr;
1627 *unescaped_buf_size = buf_end - *buf_ptr;
1633 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1636 const uint8_t *buf = avpkt->data;
1637 int buf_size = avpkt->size;
1638 MJpegDecodeContext *s = avctx->priv_data;
1639 const uint8_t *buf_end, *buf_ptr;
1640 const uint8_t *unescaped_buf_ptr;
1642 int unescaped_buf_size;
1648 buf_end = buf + buf_size;
1649 while (buf_ptr < buf_end) {
1650 /* find start next marker */
1651 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1653 &unescaped_buf_size);
1655 if (start_code < 0) {
1657 } else if (unescaped_buf_size > (1U<<28)) {
1658 av_log(avctx, AV_LOG_ERROR, "MJPEG packet 0x%x too big (0x%x/0x%x), corrupt data?\n",
1659 start_code, unescaped_buf_size, buf_size);
1660 return AVERROR_INVALIDDATA;
1662 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1663 start_code, buf_end - buf_ptr);
1664 if ((ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size)) < 0) {
1665 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
1669 s->start_code = start_code;
1670 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1671 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1673 /* process markers */
1674 if (start_code >= 0xd0 && start_code <= 0xd7)
1675 av_log(avctx, AV_LOG_DEBUG,
1676 "restart marker: %d\n", start_code & 0x0f);
1678 else if (start_code >= APP0 && start_code <= APP15)
1679 mjpeg_decode_app(s);
1681 else if (start_code == COM)
1682 mjpeg_decode_com(s);
1685 switch (start_code) {
1687 s->restart_interval = 0;
1688 s->restart_count = 0;
1689 /* nothing to do on SOI */
1692 ff_mjpeg_decode_dqt(s);
1695 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1696 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1705 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1712 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1719 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1726 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1730 if (!CONFIG_JPEGLS_DECODER ||
1731 (ret = ff_jpegls_decode_lse(s)) < 0)
1737 if (!s->got_picture) {
1738 av_log(avctx, AV_LOG_WARNING,
1739 "Found EOI before any SOF, ignoring\n");
1742 if (s->interlaced) {
1743 s->bottom_field ^= 1;
1744 /* if not bottom field, do not output image yet */
1745 if (s->bottom_field == !s->interlace_polarity)
1748 if ((ret = av_frame_ref(data, s->picture_ptr)) < 0)
1754 int qp = FFMAX3(s->qscale[0],
1757 int qpw = (s->width + 15) / 16;
1758 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
1760 memset(qp_table_buf->data, qp, qpw);
1761 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
1764 if(avctx->debug & FF_DEBUG_QP)
1765 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
1770 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1771 (avctx->err_recognition & AV_EF_EXPLODE))
1775 mjpeg_decode_dri(s);
1787 av_log(avctx, AV_LOG_ERROR,
1788 "mjpeg: unsupported coding type (%x)\n", start_code);
1792 /* eof process start code */
1793 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1794 av_log(avctx, AV_LOG_DEBUG,
1795 "marker parser used %d bytes (%d bits)\n",
1796 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1799 if (s->got_picture) {
1800 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1803 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1804 return AVERROR_INVALIDDATA;
1810 uint8_t *line = s->picture_ptr->data[s->upscale_h];
1811 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
1812 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1813 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
1814 avctx->pix_fmt == AV_PIX_FMT_YUV440P);
1815 for (i = 0; i < s->chroma_height; i++) {
1816 for (index = s->width - 1; index; index--)
1817 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
1818 line += s->linesize[s->upscale_h];
1822 uint8_t *dst = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(s->height - 1) * s->linesize[s->upscale_v]];
1824 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
1825 w = s->width >> hshift;
1826 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
1827 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1828 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
1829 avctx->pix_fmt == AV_PIX_FMT_YUV422P);
1830 for (i = s->height - 1; i; i--) {
1831 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[i / 2 * s->linesize[s->upscale_v]];
1832 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(i + 1) / 2 * s->linesize[s->upscale_v]];
1834 memcpy(dst, src1, w);
1836 for (index = 0; index < w; index++)
1837 dst[index] = (src1[index] + src2[index]) >> 1;
1839 dst -= s->linesize[s->upscale_v];
1842 if (s->flipped && (s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
1844 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
1845 for (index=0; index<4; index++) {
1846 uint8_t *dst = s->picture_ptr->data[index];
1849 if(index && index<3){
1850 w = -((-w) >> hshift);
1851 h = -((-h) >> vshift);
1854 uint8_t *dst2 = dst + s->linesize[index]*(h-1);
1855 for (i=0; i<h/2; i++) {
1857 FFSWAP(int, dst[j], dst2[j]);
1858 dst += s->linesize[index];
1859 dst2 -= s->linesize[index];
1865 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %td bytes\n",
1867 // return buf_end - buf_ptr;
1868 return buf_ptr - buf;
1871 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1873 MJpegDecodeContext *s = avctx->priv_data;
1877 av_frame_unref(s->picture_ptr);
1880 av_freep(&s->ljpeg_buffer);
1881 s->ljpeg_buffer_size = 0;
1883 for (i = 0; i < 3; i++) {
1884 for (j = 0; j < 4; j++)
1885 ff_free_vlc(&s->vlcs[i][j]);
1887 for (i = 0; i < MAX_COMPONENTS; i++) {
1888 av_freep(&s->blocks[i]);
1889 av_freep(&s->last_nnz[i]);
1894 static void decode_flush(AVCodecContext *avctx)
1896 MJpegDecodeContext *s = avctx->priv_data;
1900 #if CONFIG_MJPEG_DECODER
1901 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1902 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1903 static const AVOption options[] = {
1904 { "extern_huff", "Use external huffman table.",
1905 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
1909 static const AVClass mjpegdec_class = {
1910 .class_name = "MJPEG decoder",
1911 .item_name = av_default_item_name,
1913 .version = LIBAVUTIL_VERSION_INT,
1916 AVCodec ff_mjpeg_decoder = {
1918 .type = AVMEDIA_TYPE_VIDEO,
1919 .id = AV_CODEC_ID_MJPEG,
1920 .priv_data_size = sizeof(MJpegDecodeContext),
1921 .init = ff_mjpeg_decode_init,
1922 .close = ff_mjpeg_decode_end,
1923 .decode = ff_mjpeg_decode_frame,
1924 .flush = decode_flush,
1925 .capabilities = CODEC_CAP_DR1,
1927 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1928 .priv_class = &mjpegdec_class,
1931 #if CONFIG_THP_DECODER
1932 AVCodec ff_thp_decoder = {
1934 .type = AVMEDIA_TYPE_VIDEO,
1935 .id = AV_CODEC_ID_THP,
1936 .priv_data_size = sizeof(MJpegDecodeContext),
1937 .init = ff_mjpeg_decode_init,
1938 .close = ff_mjpeg_decode_end,
1939 .decode = ff_mjpeg_decode_frame,
1940 .flush = decode_flush,
1941 .capabilities = CODEC_CAP_DR1,
1943 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),