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"
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_dsputil_init(&s->dsp, avctx);
93 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
99 s->org_height = avctx->coded_height;
100 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
102 build_basic_mjpeg_vlc(s);
104 if (s->extern_huff) {
105 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
106 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
107 if (ff_mjpeg_decode_dht(s)) {
108 av_log(avctx, AV_LOG_ERROR,
109 "error using external huffman table, switching back to internal\n");
110 build_basic_mjpeg_vlc(s);
113 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
114 s->interlace_polarity = 1; /* bottom field first */
115 av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
117 if (avctx->codec->id == AV_CODEC_ID_AMV)
124 /* quantize tables */
125 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
127 int len, index, i, j;
129 len = get_bits(&s->gb, 16) - 2;
132 /* only 8 bit precision handled */
133 if (get_bits(&s->gb, 4) != 0) {
134 av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
137 index = get_bits(&s->gb, 4);
140 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
141 /* read quant table */
142 for (i = 0; i < 64; i++) {
143 j = s->scantable.permutated[i];
144 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
147 // XXX FIXME finetune, and perhaps add dc too
148 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
149 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
150 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
151 index, s->qscale[index]);
157 /* decode huffman tables and build VLC decoders */
158 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
160 int len, index, i, class, n, v, code_max;
161 uint8_t bits_table[17];
162 uint8_t val_table[256];
165 len = get_bits(&s->gb, 16) - 2;
169 return AVERROR_INVALIDDATA;
170 class = get_bits(&s->gb, 4);
172 return AVERROR_INVALIDDATA;
173 index = get_bits(&s->gb, 4);
175 return AVERROR_INVALIDDATA;
177 for (i = 1; i <= 16; i++) {
178 bits_table[i] = get_bits(&s->gb, 8);
182 if (len < n || n > 256)
183 return AVERROR_INVALIDDATA;
186 for (i = 0; i < n; i++) {
187 v = get_bits(&s->gb, 8);
194 /* build VLC and flush previous vlc if present */
195 ff_free_vlc(&s->vlcs[class][index]);
196 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
197 class, index, code_max + 1);
198 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
199 code_max + 1, 0, class > 0)) < 0)
203 ff_free_vlc(&s->vlcs[2][index]);
204 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
205 code_max + 1, 0, 0)) < 0)
212 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
214 int len, nb_components, i, width, height, pix_fmt_id;
215 int h_count[MAX_COMPONENTS];
216 int v_count[MAX_COMPONENTS];
219 s->upscale_h = s->upscale_v = 0;
221 /* XXX: verify len field validity */
222 len = get_bits(&s->gb, 16);
223 s->bits = get_bits(&s->gb, 8);
227 if (s->bits == 9 && !s->pegasus_rct)
228 s->rct = 1; // FIXME ugly
230 if (s->bits != 8 && !s->lossless) {
231 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
235 if(s->lossless && s->avctx->lowres){
236 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
240 height = get_bits(&s->gb, 16);
241 width = get_bits(&s->gb, 16);
243 // HACK for odd_height.mov
244 if (s->interlaced && s->width == width && s->height == height + 1)
247 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
248 if (av_image_check_size(width, height, 0, s->avctx))
249 return AVERROR_INVALIDDATA;
251 nb_components = get_bits(&s->gb, 8);
252 if (nb_components <= 0 ||
253 nb_components > MAX_COMPONENTS)
255 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
256 if (nb_components != s->nb_components) {
257 av_log(s->avctx, AV_LOG_ERROR, "nb_components changing in interlaced picture\n");
258 return AVERROR_INVALIDDATA;
261 if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
262 av_log_missing_feature(s->avctx,
263 "For JPEG-LS anything except <= 8 bits/component"
264 " or 16-bit gray", 0);
265 return AVERROR_PATCHWELCOME;
267 s->nb_components = nb_components;
270 memset(h_count, 0, sizeof(h_count));
271 memset(v_count, 0, sizeof(v_count));
272 for (i = 0; i < nb_components; i++) {
274 s->component_id[i] = get_bits(&s->gb, 8) - 1;
275 h_count[i] = get_bits(&s->gb, 4);
276 v_count[i] = get_bits(&s->gb, 4);
277 /* compute hmax and vmax (only used in interleaved case) */
278 if (h_count[i] > s->h_max)
279 s->h_max = h_count[i];
280 if (v_count[i] > s->v_max)
281 s->v_max = v_count[i];
282 if (!h_count[i] || !v_count[i]) {
283 av_log(s->avctx, AV_LOG_ERROR, "h/v_count is 0\n");
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 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
292 i, h_count[i], v_count[i],
293 s->component_id[i], s->quant_index[i]);
296 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
297 av_log_missing_feature(s->avctx, "Subsampling in JPEG-LS", 0);
298 return AVERROR_PATCHWELCOME;
301 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && nb_components==3)
304 /* if different size, realloc/alloc picture */
305 if ( width != s->width || height != s->height
306 || memcmp(s->h_count, h_count, sizeof(h_count[0])*nb_components)
307 || memcmp(s->v_count, v_count, sizeof(v_count[0])*nb_components)) {
308 av_freep(&s->qscale_table);
312 memcpy(s->h_count, h_count, sizeof(h_count));
313 memcpy(s->v_count, v_count, sizeof(v_count));
317 /* test interlaced mode */
318 if (s->first_picture &&
319 s->org_height != 0 &&
320 s->height < ((s->org_height * 3) / 4)) {
322 s->bottom_field = s->interlace_polarity;
323 s->picture_ptr->interlaced_frame = 1;
324 s->picture_ptr->top_field_first = !s->interlace_polarity;
328 avcodec_set_dimensions(s->avctx, width, height);
330 s->qscale_table = av_mallocz((s->width + 15) / 16);
331 s->first_picture = 0;
334 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
335 if (s->progressive) {
336 av_log_ask_for_sample(s->avctx, "progressively coded interlaced pictures not supported\n");
337 return AVERROR_INVALIDDATA;
340 /* XXX: not complete test ! */
341 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
342 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
343 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
344 (s->h_count[3] << 4) | s->v_count[3];
345 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
346 /* NOTE we do not allocate pictures large enough for the possible
347 * padding of h/v_count being 4 */
348 if (!(pix_fmt_id & 0xD0D0D0D0))
349 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
350 if (!(pix_fmt_id & 0x0D0D0D0D))
351 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
353 switch (pix_fmt_id) {
356 s->avctx->pix_fmt = AV_PIX_FMT_BGR24;
358 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
359 s->avctx->pix_fmt = AV_PIX_FMT_GBR24P;
361 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
362 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
365 av_assert0(s->nb_components == 3);
369 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
370 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
372 s->upscale_h = (pix_fmt_id == 0x22122100);
373 s->chroma_height = s->height;
377 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
378 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
379 s->upscale_v = (pix_fmt_id == 0x22211200);
381 s->chroma_height = s->height;
384 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
385 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
388 s->chroma_height = s->height / 2;
392 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
394 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
399 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
400 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
401 s->upscale_h = (pix_fmt_id == 0x22211100) * 2 + (pix_fmt_id == 0x22112100);
402 s->chroma_height = s->height / 2;
405 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
406 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
410 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
411 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
412 s->upscale_v = (pix_fmt_id == 0x22121100) + 1;
415 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
416 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
419 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
420 return AVERROR_PATCHWELCOME;
422 if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
423 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
424 return AVERROR_PATCHWELCOME;
427 s->upscale_h = s->upscale_v = 0;
428 if (s->nb_components > 1)
429 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
430 else if (s->bits <= 8)
431 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
433 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
436 if (s->picture_ptr->data[0])
437 s->avctx->release_buffer(s->avctx, s->picture_ptr);
439 if (ff_get_buffer(s->avctx, s->picture_ptr) < 0) {
440 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
443 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
444 s->picture_ptr->key_frame = 1;
447 for (i = 0; i < 3; i++)
448 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
450 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
451 s->width, s->height, s->linesize[0], s->linesize[1],
452 s->interlaced, s->avctx->height);
454 if (len != (8 + (3 * nb_components)))
455 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
458 /* totally blank picture as progressive JPEG will only add details to it */
459 if (s->progressive) {
460 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
461 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
462 for (i = 0; i < s->nb_components; i++) {
463 int size = bw * bh * s->h_count[i] * s->v_count[i];
464 av_freep(&s->blocks[i]);
465 av_freep(&s->last_nnz[i]);
466 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
467 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
468 s->block_stride[i] = bw * s->h_count[i];
470 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
475 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
478 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
480 av_log(s->avctx, AV_LOG_WARNING,
481 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
482 0, dc_index, &s->vlcs[0][dc_index]);
487 return get_xbits(&s->gb, code);
492 /* decode block and dequantize */
493 static int decode_block(MJpegDecodeContext *s, DCTELEM *block, int component,
494 int dc_index, int ac_index, int16_t *quant_matrix)
496 int code, i, j, level, val;
499 val = mjpeg_decode_dc(s, dc_index);
501 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
502 return AVERROR_INVALIDDATA;
504 val = val * quant_matrix[0] + s->last_dc[component];
505 s->last_dc[component] = val;
509 {OPEN_READER(re, &s->gb);
511 UPDATE_CACHE(re, &s->gb);
512 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
514 i += ((unsigned)code) >> 4;
517 if (code > MIN_CACHE_BITS - 16)
518 UPDATE_CACHE(re, &s->gb);
521 int cache = GET_CACHE(re, &s->gb);
522 int sign = (~cache) >> 31;
523 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
526 LAST_SKIP_BITS(re, &s->gb, code);
529 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
530 return AVERROR_INVALIDDATA;
532 j = s->scantable.permutated[i];
533 block[j] = level * quant_matrix[j];
536 CLOSE_READER(re, &s->gb);}
541 static int decode_dc_progressive(MJpegDecodeContext *s, DCTELEM *block,
542 int component, int dc_index,
543 int16_t *quant_matrix, int Al)
546 s->dsp.clear_block(block);
547 val = mjpeg_decode_dc(s, dc_index);
549 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
550 return AVERROR_INVALIDDATA;
552 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
553 s->last_dc[component] = val;
558 /* decode block and dequantize - progressive JPEG version */
559 static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block,
560 uint8_t *last_nnz, int ac_index,
561 int16_t *quant_matrix,
562 int ss, int se, int Al, int *EOBRUN)
564 int code, i, j, level, val, run;
572 OPEN_READER(re, &s->gb);
573 for (i = ss; ; i++) {
574 UPDATE_CACHE(re, &s->gb);
575 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
577 run = ((unsigned) code) >> 4;
581 if (code > MIN_CACHE_BITS - 16)
582 UPDATE_CACHE(re, &s->gb);
585 int cache = GET_CACHE(re, &s->gb);
586 int sign = (~cache) >> 31;
587 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
590 LAST_SKIP_BITS(re, &s->gb, code);
594 j = s->scantable.permutated[se];
595 block[j] = level * quant_matrix[j] << Al;
598 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
599 return AVERROR_INVALIDDATA;
601 j = s->scantable.permutated[i];
602 block[j] = level * quant_matrix[j] << Al;
604 if (run == 0xF) {// ZRL - skip 15 coefficients
607 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
608 return AVERROR_INVALIDDATA;
613 UPDATE_CACHE(re, &s->gb);
614 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
615 LAST_SKIP_BITS(re, &s->gb, run);
622 CLOSE_READER(re, &s->gb);
631 #define REFINE_BIT(j) { \
632 UPDATE_CACHE(re, &s->gb); \
633 sign = block[j] >> 15; \
634 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
635 ((quant_matrix[j] ^ sign) - sign) << Al; \
636 LAST_SKIP_BITS(re, &s->gb, 1); \
644 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
649 j = s->scantable.permutated[i]; \
652 else if (run-- == 0) \
656 /* decode block and dequantize - progressive JPEG refinement pass */
657 static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block,
659 int ac_index, int16_t *quant_matrix,
660 int ss, int se, int Al, int *EOBRUN)
662 int code, i = ss, j, sign, val, run;
663 int last = FFMIN(se, *last_nnz);
665 OPEN_READER(re, &s->gb);
670 UPDATE_CACHE(re, &s->gb);
671 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
674 run = ((unsigned) code) >> 4;
675 UPDATE_CACHE(re, &s->gb);
676 val = SHOW_UBITS(re, &s->gb, 1);
677 LAST_SKIP_BITS(re, &s->gb, 1);
679 j = s->scantable.permutated[i];
681 block[j] = ((quant_matrix[j]^val) - val) << Al;
685 CLOSE_READER(re, &s->gb);
689 run = ((unsigned) code) >> 4;
696 UPDATE_CACHE(re, &s->gb);
697 run += SHOW_UBITS(re, &s->gb, val);
698 LAST_SKIP_BITS(re, &s->gb, val);
710 for (; i <= last; i++) {
711 j = s->scantable.permutated[i];
715 CLOSE_READER(re, &s->gb);
722 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
725 uint16_t (*buffer)[4];
726 int left[3], top[3], topleft[3];
727 const int linesize = s->linesize[0];
728 const int mask = (1 << s->bits) - 1;
732 s->restart_count = s->restart_interval;
734 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
735 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
736 buffer = s->ljpeg_buffer;
738 for (i = 0; i < 3; i++)
739 buffer[0][i] = 1 << (s->bits - 1);
741 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
742 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
744 if (s->interlaced && s->bottom_field)
745 ptr += linesize >> 1;
747 for (i = 0; i < 3; i++)
748 top[i] = left[i] = topleft[i] = buffer[0][i];
750 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
751 int modified_predictor = predictor;
753 if (s->restart_interval && !s->restart_count){
754 s->restart_count = s->restart_interval;
758 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
760 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
761 modified_predictor = 1;
763 for (i=0;i<nb_components;i++) {
767 top[i] = buffer[mb_x][i];
769 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
771 dc = mjpeg_decode_dc(s, s->dc_index[i]);
775 left[i] = buffer[mb_x][i] =
776 mask & (pred + (dc << point_transform));
779 if (s->restart_interval && !--s->restart_count) {
780 align_get_bits(&s->gb);
781 skip_bits(&s->gb, 16); /* skip RSTn */
786 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
787 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
788 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
789 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
791 } else if (s->pegasus_rct) {
792 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
793 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
794 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
795 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
798 for(i=0; i<nb_components; i++) {
799 int c= s->comp_index[i];
800 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
801 ptr[3*mb_x+2-c] = buffer[mb_x][i];
809 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
813 const int nb_components=s->nb_components;
814 int bits= (s->bits+7)&~7;
818 point_transform += bits - s->bits;
820 av_assert0(nb_components==1 || nb_components==3);
822 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
823 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
824 if (s->restart_interval && !s->restart_count){
825 s->restart_count = s->restart_interval;
830 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
831 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
832 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
833 for (i = 0; i < nb_components; i++) {
836 int n, h, v, x, y, c, j, linesize;
838 c = s->comp_index[i];
843 linesize= s->linesize[c];
845 if(bits>8) linesize /= 2;
850 dc = mjpeg_decode_dc(s, s->dc_index[i]);
854 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
857 pred= 1 << (bits - 1);
863 pred= ptr[-linesize];
865 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
869 if (s->interlaced && s->bottom_field)
870 ptr += linesize >> 1;
871 pred &= (-1)<<(8-s->bits);
872 *ptr= pred + (dc << point_transform);
874 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
877 pred= 1 << (bits - 1);
883 pred= ptr16[-linesize];
885 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
889 if (s->interlaced && s->bottom_field)
890 ptr16 += linesize >> 1;
891 pred &= (-1)<<(16-s->bits);
892 *ptr16= pred + (dc << point_transform);
901 for (i = 0; i < nb_components; i++) {
904 int n, h, v, x, y, c, j, linesize, dc;
906 c = s->comp_index[i];
911 linesize = s->linesize[c];
913 if(bits>8) linesize /= 2;
915 for (j = 0; j < n; j++) {
918 dc = mjpeg_decode_dc(s, s->dc_index[i]);
922 ptr = s->picture.data[c] +
923 (linesize * (v * mb_y + y)) +
924 (h * mb_x + x); //FIXME optimize this crap
925 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
927 pred &= (-1)<<(8-s->bits);
928 *ptr = pred + (dc << point_transform);
930 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
931 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
933 pred &= (-1)<<(16-s->bits);
934 *ptr16= pred + (dc << point_transform);
944 if (s->restart_interval && !--s->restart_count) {
945 align_get_bits(&s->gb);
946 skip_bits(&s->gb, 16); /* skip RSTn */
953 static av_always_inline void mjpeg_copy_block(uint8_t *dst, const uint8_t *src,
954 int linesize, int lowres)
957 case 0: copy_block8(dst, src, linesize, linesize, 8);
959 case 1: copy_block4(dst, src, linesize, linesize, 4);
961 case 2: copy_block2(dst, src, linesize, linesize, 2);
968 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
969 int Al, const uint8_t *mb_bitmask,
970 const AVFrame *reference)
973 uint8_t *data[MAX_COMPONENTS];
974 const uint8_t *reference_data[MAX_COMPONENTS];
975 int linesize[MAX_COMPONENTS];
976 GetBitContext mb_bitmask_gb;
979 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
981 if (s->flipped && s->avctx->lowres) {
982 av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with lowres\n");
986 for (i = 0; i < nb_components; i++) {
987 int c = s->comp_index[i];
988 data[c] = s->picture_ptr->data[c];
989 reference_data[c] = reference ? reference->data[c] : NULL;
990 linesize[c] = s->linesize[c];
991 s->coefs_finished[c] |= 1;
992 if (s->flipped && !(s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
993 // picture should be flipped upside-down for this codec
994 int offset = (linesize[c] * (s->v_scount[i] *
995 (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
997 reference_data[c] += offset;
1002 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1003 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1004 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1006 if (s->restart_interval && !s->restart_count)
1007 s->restart_count = s->restart_interval;
1009 if (get_bits_left(&s->gb) < 0) {
1010 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1011 -get_bits_left(&s->gb));
1012 return AVERROR_INVALIDDATA;
1014 for (i = 0; i < nb_components; i++) {
1016 int n, h, v, x, y, c, j;
1018 n = s->nb_blocks[i];
1019 c = s->comp_index[i];
1024 for (j = 0; j < n; j++) {
1025 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1026 (h * mb_x + x) * 8) >> s->avctx->lowres);
1028 if (s->interlaced && s->bottom_field)
1029 block_offset += linesize[c] >> 1;
1030 ptr = data[c] + block_offset;
1031 if (!s->progressive) {
1033 mjpeg_copy_block(ptr, reference_data[c] + block_offset,
1034 linesize[c], s->avctx->lowres);
1036 s->dsp.clear_block(s->block);
1037 if (decode_block(s, s->block, i,
1038 s->dc_index[i], s->ac_index[i],
1039 s->quant_matrixes[s->quant_index[c]]) < 0) {
1040 av_log(s->avctx, AV_LOG_ERROR,
1041 "error y=%d x=%d\n", mb_y, mb_x);
1042 return AVERROR_INVALIDDATA;
1044 s->dsp.idct_put(ptr, linesize[c], s->block);
1047 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1049 DCTELEM *block = s->blocks[c][block_idx];
1051 block[0] += get_bits1(&s->gb) *
1052 s->quant_matrixes[s->quant_index[c]][0] << Al;
1053 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1054 s->quant_matrixes[s->quant_index[c]],
1056 av_log(s->avctx, AV_LOG_ERROR,
1057 "error y=%d x=%d\n", mb_y, mb_x);
1058 return AVERROR_INVALIDDATA;
1061 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1062 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1063 mb_x, mb_y, x, y, c, s->bottom_field,
1064 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1072 if (s->restart_interval) {
1074 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
1075 align_get_bits(&s->gb);
1076 for (i = 0; i < nb_components; i++) /* reset dc */
1077 s->last_dc[i] = 1024;
1080 i = 8 + ((-get_bits_count(&s->gb)) & 7);
1082 if (show_bits(&s->gb, i) == (1 << i) - 1) {
1083 int pos = get_bits_count(&s->gb);
1084 align_get_bits(&s->gb);
1085 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
1086 skip_bits(&s->gb, 8);
1087 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
1088 for (i = 0; i < nb_components; i++) /* reset dc */
1089 s->last_dc[i] = 1024;
1091 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
1099 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1100 int se, int Ah, int Al)
1104 int c = s->comp_index[0];
1105 uint8_t *data = s->picture.data[c];
1106 int linesize = s->linesize[c];
1108 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
1111 av_log(s->avctx, AV_LOG_ERROR, "SE %d is too large\n", se);
1112 return AVERROR_INVALIDDATA;
1116 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
1117 last_scan = !~s->coefs_finished[c];
1120 if (s->interlaced && s->bottom_field)
1121 data += linesize >> 1;
1123 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1124 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1125 int block_idx = mb_y * s->block_stride[c];
1126 DCTELEM (*block)[64] = &s->blocks[c][block_idx];
1127 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1128 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1131 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1132 quant_matrix, ss, se, Al, &EOBRUN);
1134 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1135 quant_matrix, ss, se, Al, &EOBRUN);
1137 av_log(s->avctx, AV_LOG_ERROR,
1138 "error y=%d x=%d\n", mb_y, mb_x);
1139 return AVERROR_INVALIDDATA;
1143 s->dsp.idct_put(ptr, linesize, *block);
1144 ptr += 8 >> s->avctx->lowres;
1151 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1152 const AVFrame *reference)
1154 int len, nb_components, i, h, v, predictor, point_transform;
1156 const int block_size = s->lossless ? 1 : 8;
1157 int ilv, prev_shift;
1159 if (!s->got_picture) {
1160 av_log(s->avctx, AV_LOG_WARNING,
1161 "Can not process SOS before SOF, skipping\n");
1165 av_assert0(s->picture_ptr->data[0]);
1166 /* XXX: verify len field validity */
1167 len = get_bits(&s->gb, 16);
1168 nb_components = get_bits(&s->gb, 8);
1169 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1170 av_log(s->avctx, AV_LOG_ERROR,
1171 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1172 return AVERROR_PATCHWELCOME;
1174 if (len != 6 + 2 * nb_components) {
1175 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1176 return AVERROR_INVALIDDATA;
1178 for (i = 0; i < nb_components; i++) {
1179 id = get_bits(&s->gb, 8) - 1;
1180 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1181 /* find component index */
1182 for (index = 0; index < s->nb_components; index++)
1183 if (id == s->component_id[index])
1185 if (index == s->nb_components) {
1186 av_log(s->avctx, AV_LOG_ERROR,
1187 "decode_sos: index(%d) out of components\n", index);
1188 return AVERROR_INVALIDDATA;
1190 /* Metasoft MJPEG codec has Cb and Cr swapped */
1191 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1192 && nb_components == 3 && s->nb_components == 3 && i)
1195 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1197 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1198 index = (index+2)%3;
1200 s->comp_index[i] = index;
1202 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1203 s->h_scount[i] = s->h_count[index];
1204 s->v_scount[i] = s->v_count[index];
1206 s->dc_index[i] = get_bits(&s->gb, 4);
1207 s->ac_index[i] = get_bits(&s->gb, 4);
1209 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1210 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1212 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))
1216 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1217 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1218 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1219 prev_shift = get_bits(&s->gb, 4); /* Ah */
1220 point_transform = get_bits(&s->gb, 4); /* Al */
1222 prev_shift = point_transform = 0;
1224 if (nb_components > 1) {
1225 /* interleaved stream */
1226 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1227 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1228 } else if (!s->ls) { /* skip this for JPEG-LS */
1229 h = s->h_max / s->h_scount[0];
1230 v = s->v_max / s->v_scount[0];
1231 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1232 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1233 s->nb_blocks[0] = 1;
1238 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1239 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1240 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1241 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1242 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1245 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1246 for (i = s->mjpb_skiptosod; i > 0; i--)
1247 skip_bits(&s->gb, 8);
1250 for (i = 0; i < nb_components; i++)
1251 s->last_dc[i] = 1024;
1254 av_assert0(s->picture_ptr == &s->picture);
1255 if (CONFIG_JPEGLS_DECODER && s->ls) {
1257 // reset_ls_coding_parameters(s, 0);
1259 if ((ret = ff_jpegls_decode_picture(s, predictor,
1260 point_transform, ilv)) < 0)
1264 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1267 if ((ret = ljpeg_decode_yuv_scan(s, predictor, point_transform)) < 0)
1272 if (s->progressive && predictor) {
1273 av_assert0(s->picture_ptr == &s->picture);
1274 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1276 point_transform)) < 0)
1279 if ((ret = mjpeg_decode_scan(s, nb_components,
1280 prev_shift, point_transform,
1281 mb_bitmask, reference)) < 0)
1286 if (s->interlaced &&
1287 get_bits_left(&s->gb) > 32 &&
1288 show_bits(&s->gb, 8) == 0xFF) {
1289 GetBitContext bak = s->gb;
1290 align_get_bits(&bak);
1291 if (show_bits(&bak, 16) == 0xFFD1) {
1292 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1294 skip_bits(&s->gb, 16);
1295 s->bottom_field ^= 1;
1304 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1305 return AVERROR_INVALIDDATA;
1308 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1310 if (get_bits(&s->gb, 16) != 4)
1311 return AVERROR_INVALIDDATA;
1312 s->restart_interval = get_bits(&s->gb, 16);
1313 s->restart_count = 0;
1314 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1315 s->restart_interval);
1320 static int mjpeg_decode_app(MJpegDecodeContext *s)
1324 len = get_bits(&s->gb, 16);
1326 return AVERROR_INVALIDDATA;
1327 if (8 * len > get_bits_left(&s->gb))
1328 return AVERROR_INVALIDDATA;
1330 id = get_bits_long(&s->gb, 32);
1331 id = av_be2ne32(id);
1334 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1335 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1337 /* Buggy AVID, it puts EOI only at every 10th frame. */
1338 /* Also, this fourcc is used by non-avid files too, it holds some
1339 information, but it's always present in AVID-created files. */
1340 if (id == AV_RL32("AVI1")) {
1346 4bytes field_size_less_padding
1349 i = get_bits(&s->gb, 8); len--;
1350 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1352 skip_bits(&s->gb, 8);
1353 skip_bits(&s->gb, 32);
1354 skip_bits(&s->gb, 32);
1362 if (id == AV_RL32("JFIF")) {
1363 int t_w, t_h, v1, v2;
1364 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1365 v1 = get_bits(&s->gb, 8);
1366 v2 = get_bits(&s->gb, 8);
1367 skip_bits(&s->gb, 8);
1369 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1370 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1372 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1373 av_log(s->avctx, AV_LOG_INFO,
1374 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1376 s->avctx->sample_aspect_ratio.num,
1377 s->avctx->sample_aspect_ratio.den);
1379 t_w = get_bits(&s->gb, 8);
1380 t_h = get_bits(&s->gb, 8);
1382 /* skip thumbnail */
1383 if (len -10 - (t_w * t_h * 3) > 0)
1384 len -= t_w * t_h * 3;
1390 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1391 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1392 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1393 skip_bits(&s->gb, 16); /* version */
1394 skip_bits(&s->gb, 16); /* flags0 */
1395 skip_bits(&s->gb, 16); /* flags1 */
1396 skip_bits(&s->gb, 8); /* transform */
1401 if (id == AV_RL32("LJIF")) {
1402 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1403 av_log(s->avctx, AV_LOG_INFO,
1404 "Pegasus lossless jpeg header found\n");
1405 skip_bits(&s->gb, 16); /* version ? */
1406 skip_bits(&s->gb, 16); /* unknwon always 0? */
1407 skip_bits(&s->gb, 16); /* unknwon always 0? */
1408 skip_bits(&s->gb, 16); /* unknwon always 0? */
1409 switch (get_bits(&s->gb, 8)) {
1419 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1426 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1427 id = get_bits_long(&s->gb, 32);
1428 id = av_be2ne32(id);
1431 if (id == AV_RL32("mjpg")) {
1433 skip_bits(&s->gb, 32); /* field size */
1434 skip_bits(&s->gb, 32); /* pad field size */
1435 skip_bits(&s->gb, 32); /* next off */
1436 skip_bits(&s->gb, 32); /* quant off */
1437 skip_bits(&s->gb, 32); /* huff off */
1438 skip_bits(&s->gb, 32); /* image off */
1439 skip_bits(&s->gb, 32); /* scan off */
1440 skip_bits(&s->gb, 32); /* data off */
1442 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1443 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1448 /* slow but needed for extreme adobe jpegs */
1450 av_log(s->avctx, AV_LOG_ERROR,
1451 "mjpeg: error, decode_app parser read over the end\n");
1453 skip_bits(&s->gb, 8);
1458 static int mjpeg_decode_com(MJpegDecodeContext *s)
1460 int len = get_bits(&s->gb, 16);
1461 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1462 char *cbuf = av_malloc(len - 1);
1465 for (i = 0; i < len - 2; i++)
1466 cbuf[i] = get_bits(&s->gb, 8);
1467 if (i > 0 && cbuf[i - 1] == '\n')
1472 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1473 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1475 /* buggy avid, it puts EOI only at every 10th frame */
1476 if (!strcmp(cbuf, "AVID")) {
1478 } else if (!strcmp(cbuf, "CS=ITU601"))
1480 else if ((len > 31 && !strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32)) ||
1481 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1491 /* return the 8 bit start code value and update the search
1492 state. Return -1 if no start code found */
1493 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1495 const uint8_t *buf_ptr;
1500 buf_ptr = *pbuf_ptr;
1501 while (buf_ptr < buf_end) {
1504 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1512 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1513 *pbuf_ptr = buf_ptr;
1517 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1518 const uint8_t **buf_ptr, const uint8_t *buf_end,
1519 const uint8_t **unescaped_buf_ptr,
1520 int *unescaped_buf_size)
1523 start_code = find_marker(buf_ptr, buf_end);
1525 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1527 return AVERROR(ENOMEM);
1529 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1530 if (start_code == SOS && !s->ls) {
1531 const uint8_t *src = *buf_ptr;
1532 uint8_t *dst = s->buffer;
1534 while (src < buf_end) {
1535 uint8_t x = *(src++);
1538 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1540 while (src < buf_end && x == 0xff)
1543 if (x >= 0xd0 && x <= 0xd7)
1550 *unescaped_buf_ptr = s->buffer;
1551 *unescaped_buf_size = dst - s->buffer;
1553 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1554 (buf_end - *buf_ptr) - (dst - s->buffer));
1555 } else if (start_code == SOS && s->ls) {
1556 const uint8_t *src = *buf_ptr;
1557 uint8_t *dst = s->buffer;
1565 while (src + t < buf_end) {
1566 uint8_t x = src[t++];
1568 while ((src + t < buf_end) && x == 0xff)
1577 init_put_bits(&pb, dst, t);
1579 /* unescape bitstream */
1581 uint8_t x = src[b++];
1582 put_bits(&pb, 8, x);
1585 put_bits(&pb, 7, x);
1589 flush_put_bits(&pb);
1591 *unescaped_buf_ptr = dst;
1592 *unescaped_buf_size = (bit_count + 7) >> 3;
1594 *unescaped_buf_ptr = *buf_ptr;
1595 *unescaped_buf_size = buf_end - *buf_ptr;
1601 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1604 const uint8_t *buf = avpkt->data;
1605 int buf_size = avpkt->size;
1606 MJpegDecodeContext *s = avctx->priv_data;
1607 const uint8_t *buf_end, *buf_ptr;
1608 const uint8_t *unescaped_buf_ptr;
1609 int unescaped_buf_size;
1613 AVFrame *picture = data;
1616 buf_end = buf + buf_size;
1617 while (buf_ptr < buf_end) {
1618 /* find start next marker */
1619 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1621 &unescaped_buf_size);
1623 if (start_code < 0) {
1625 } else if (unescaped_buf_size > (1U<<28)) {
1626 av_log(avctx, AV_LOG_ERROR, "MJPEG packet 0x%x too big (0x%x/0x%x), corrupt data?\n",
1627 start_code, unescaped_buf_size, buf_size);
1628 return AVERROR_INVALIDDATA;
1630 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1631 start_code, buf_end - buf_ptr);
1633 init_get_bits(&s->gb, unescaped_buf_ptr, unescaped_buf_size * 8);
1635 s->start_code = start_code;
1636 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1637 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1639 /* process markers */
1640 if (start_code >= 0xd0 && start_code <= 0xd7)
1641 av_log(avctx, AV_LOG_DEBUG,
1642 "restart marker: %d\n", start_code & 0x0f);
1644 else if (start_code >= APP0 && start_code <= APP15)
1645 mjpeg_decode_app(s);
1647 else if (start_code == COM)
1648 mjpeg_decode_com(s);
1651 switch (start_code) {
1653 s->restart_interval = 0;
1654 s->restart_count = 0;
1655 /* nothing to do on SOI */
1658 ff_mjpeg_decode_dqt(s);
1661 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1662 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1671 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1678 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1685 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1692 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1696 if (!CONFIG_JPEGLS_DECODER ||
1697 (ret = ff_jpegls_decode_lse(s)) < 0)
1703 if (!s->got_picture) {
1704 av_log(avctx, AV_LOG_WARNING,
1705 "Found EOI before any SOF, ignoring\n");
1708 if (s->interlaced) {
1709 s->bottom_field ^= 1;
1710 /* if not bottom field, do not output image yet */
1711 if (s->bottom_field == !s->interlace_polarity)
1714 *picture = *s->picture_ptr;
1719 picture->quality = FFMAX3(s->qscale[0],
1722 picture->qstride = 0;
1723 picture->qscale_table = s->qscale_table;
1724 memset(picture->qscale_table, picture->quality,
1725 (s->width + 15) / 16);
1726 if (avctx->debug & FF_DEBUG_QP)
1727 av_log(avctx, AV_LOG_DEBUG,
1728 "QP: %d\n", picture->quality);
1729 picture->quality *= FF_QP2LAMBDA;
1734 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1735 (avctx->err_recognition & AV_EF_EXPLODE))
1739 mjpeg_decode_dri(s);
1751 av_log(avctx, AV_LOG_ERROR,
1752 "mjpeg: unsupported coding type (%x)\n", start_code);
1756 /* eof process start code */
1757 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1758 av_log(avctx, AV_LOG_DEBUG,
1759 "marker parser used %d bytes (%d bits)\n",
1760 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1763 if (s->got_picture) {
1764 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1767 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1768 return AVERROR_INVALIDDATA;
1774 uint8_t *line = s->picture_ptr->data[s->upscale_h];
1775 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
1776 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1777 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
1778 avctx->pix_fmt == AV_PIX_FMT_YUV440P);
1779 for (i = 0; i < s->chroma_height; i++) {
1780 for (index = s->width - 1; index; index--)
1781 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
1782 line += s->linesize[s->upscale_h];
1786 uint8_t *dst = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(s->height - 1) * s->linesize[s->upscale_v]];
1787 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
1788 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1789 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
1790 avctx->pix_fmt == AV_PIX_FMT_YUV422P);
1791 for (i = s->height - 1; i; i--) {
1792 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[i / 2 * s->linesize[s->upscale_v]];
1793 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(i + 1) / 2 * s->linesize[s->upscale_v]];
1795 memcpy(dst, src1, s->width);
1797 for (index = 0; index < s->width; index++)
1798 dst[index] = (src1[index] + src2[index]) >> 1;
1800 dst -= s->linesize[s->upscale_v];
1803 if (s->flipped && (s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
1804 int hshift, vshift, j;
1805 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
1806 for (index=0; index<4; index++) {
1807 uint8_t *dst = s->picture_ptr->data[index];
1810 if(index && index<3){
1811 w = -((-w) >> hshift);
1812 h = -((-h) >> vshift);
1815 uint8_t *dst2 = dst + s->linesize[index]*(h-1);
1816 for (i=0; i<h/2; i++) {
1818 FFSWAP(int, dst[j], dst2[j]);
1819 dst += s->linesize[index];
1820 dst2 -= s->linesize[index];
1826 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %td bytes\n",
1828 // return buf_end - buf_ptr;
1829 return buf_ptr - buf;
1832 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1834 MJpegDecodeContext *s = avctx->priv_data;
1837 if (s->picture_ptr && s->picture_ptr->data[0])
1838 avctx->release_buffer(avctx, s->picture_ptr);
1841 av_free(s->qscale_table);
1842 av_freep(&s->ljpeg_buffer);
1843 s->ljpeg_buffer_size = 0;
1845 for (i = 0; i < 3; i++) {
1846 for (j = 0; j < 4; j++)
1847 ff_free_vlc(&s->vlcs[i][j]);
1849 for (i = 0; i < MAX_COMPONENTS; i++) {
1850 av_freep(&s->blocks[i]);
1851 av_freep(&s->last_nnz[i]);
1856 static void decode_flush(AVCodecContext *avctx)
1858 MJpegDecodeContext *s = avctx->priv_data;
1862 #if CONFIG_MJPEG_DECODER
1863 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1864 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1865 static const AVOption options[] = {
1866 { "extern_huff", "Use external huffman table.",
1867 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
1871 static const AVClass mjpegdec_class = {
1872 .class_name = "MJPEG decoder",
1873 .item_name = av_default_item_name,
1875 .version = LIBAVUTIL_VERSION_INT,
1878 AVCodec ff_mjpeg_decoder = {
1880 .type = AVMEDIA_TYPE_VIDEO,
1881 .id = AV_CODEC_ID_MJPEG,
1882 .priv_data_size = sizeof(MJpegDecodeContext),
1883 .init = ff_mjpeg_decode_init,
1884 .close = ff_mjpeg_decode_end,
1885 .decode = ff_mjpeg_decode_frame,
1886 .flush = decode_flush,
1887 .capabilities = CODEC_CAP_DR1,
1889 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1890 .priv_class = &mjpegdec_class,
1893 #if CONFIG_THP_DECODER
1894 AVCodec ff_thp_decoder = {
1896 .type = AVMEDIA_TYPE_VIDEO,
1897 .id = AV_CODEC_ID_THP,
1898 .priv_data_size = sizeof(MJpegDecodeContext),
1899 .init = ff_mjpeg_decode_init,
1900 .close = ff_mjpeg_decode_end,
1901 .decode = ff_mjpeg_decode_frame,
1902 .flush = decode_flush,
1903 .capabilities = CODEC_CAP_DR1,
1905 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),