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;
400 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
402 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
407 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
408 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
409 s->upscale_h = (pix_fmt_id == 0x22211100) * 2 + (pix_fmt_id == 0x22112100);
410 s->chroma_height = s->height / 2;
413 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
414 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
418 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
419 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
420 s->upscale_v = (pix_fmt_id == 0x22121100) + 1;
423 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
424 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
427 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
428 return AVERROR_PATCHWELCOME;
430 if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
431 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
432 return AVERROR_PATCHWELCOME;
435 s->upscale_h = s->upscale_v = 0;
436 if (s->nb_components > 1)
437 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
438 else if (s->bits <= 8)
439 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
441 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
444 if (s->picture_ptr->data[0])
445 s->avctx->release_buffer(s->avctx, s->picture_ptr);
447 if (ff_get_buffer(s->avctx, s->picture_ptr) < 0) {
448 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
451 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
452 s->picture_ptr->key_frame = 1;
455 for (i = 0; i < 3; i++)
456 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
458 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
459 s->width, s->height, s->linesize[0], s->linesize[1],
460 s->interlaced, s->avctx->height);
462 if (len != (8 + (3 * nb_components)))
463 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
466 /* totally blank picture as progressive JPEG will only add details to it */
467 if (s->progressive) {
468 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
469 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
470 for (i = 0; i < s->nb_components; i++) {
471 int size = bw * bh * s->h_count[i] * s->v_count[i];
472 av_freep(&s->blocks[i]);
473 av_freep(&s->last_nnz[i]);
474 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
475 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
476 s->block_stride[i] = bw * s->h_count[i];
478 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
483 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
486 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
488 av_log(s->avctx, AV_LOG_WARNING,
489 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
490 0, dc_index, &s->vlcs[0][dc_index]);
495 return get_xbits(&s->gb, code);
500 /* decode block and dequantize */
501 static int decode_block(MJpegDecodeContext *s, DCTELEM *block, int component,
502 int dc_index, int ac_index, int16_t *quant_matrix)
504 int code, i, j, level, val;
507 val = mjpeg_decode_dc(s, dc_index);
509 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
510 return AVERROR_INVALIDDATA;
512 val = val * quant_matrix[0] + s->last_dc[component];
513 s->last_dc[component] = val;
517 {OPEN_READER(re, &s->gb);
519 UPDATE_CACHE(re, &s->gb);
520 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
522 i += ((unsigned)code) >> 4;
525 if (code > MIN_CACHE_BITS - 16)
526 UPDATE_CACHE(re, &s->gb);
529 int cache = GET_CACHE(re, &s->gb);
530 int sign = (~cache) >> 31;
531 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
534 LAST_SKIP_BITS(re, &s->gb, code);
537 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
538 return AVERROR_INVALIDDATA;
540 j = s->scantable.permutated[i];
541 block[j] = level * quant_matrix[j];
544 CLOSE_READER(re, &s->gb);}
549 static int decode_dc_progressive(MJpegDecodeContext *s, DCTELEM *block,
550 int component, int dc_index,
551 int16_t *quant_matrix, int Al)
554 s->dsp.clear_block(block);
555 val = mjpeg_decode_dc(s, dc_index);
557 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
558 return AVERROR_INVALIDDATA;
560 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
561 s->last_dc[component] = val;
566 /* decode block and dequantize - progressive JPEG version */
567 static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block,
568 uint8_t *last_nnz, int ac_index,
569 int16_t *quant_matrix,
570 int ss, int se, int Al, int *EOBRUN)
572 int code, i, j, level, val, run;
580 OPEN_READER(re, &s->gb);
581 for (i = ss; ; i++) {
582 UPDATE_CACHE(re, &s->gb);
583 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
585 run = ((unsigned) code) >> 4;
589 if (code > MIN_CACHE_BITS - 16)
590 UPDATE_CACHE(re, &s->gb);
593 int cache = GET_CACHE(re, &s->gb);
594 int sign = (~cache) >> 31;
595 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
598 LAST_SKIP_BITS(re, &s->gb, code);
602 j = s->scantable.permutated[se];
603 block[j] = level * quant_matrix[j] << Al;
606 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
607 return AVERROR_INVALIDDATA;
609 j = s->scantable.permutated[i];
610 block[j] = level * quant_matrix[j] << Al;
612 if (run == 0xF) {// ZRL - skip 15 coefficients
615 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
616 return AVERROR_INVALIDDATA;
621 UPDATE_CACHE(re, &s->gb);
622 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
623 LAST_SKIP_BITS(re, &s->gb, run);
630 CLOSE_READER(re, &s->gb);
639 #define REFINE_BIT(j) { \
640 UPDATE_CACHE(re, &s->gb); \
641 sign = block[j] >> 15; \
642 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
643 ((quant_matrix[j] ^ sign) - sign) << Al; \
644 LAST_SKIP_BITS(re, &s->gb, 1); \
652 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
657 j = s->scantable.permutated[i]; \
660 else if (run-- == 0) \
664 /* decode block and dequantize - progressive JPEG refinement pass */
665 static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block,
667 int ac_index, int16_t *quant_matrix,
668 int ss, int se, int Al, int *EOBRUN)
670 int code, i = ss, j, sign, val, run;
671 int last = FFMIN(se, *last_nnz);
673 OPEN_READER(re, &s->gb);
678 UPDATE_CACHE(re, &s->gb);
679 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
682 run = ((unsigned) code) >> 4;
683 UPDATE_CACHE(re, &s->gb);
684 val = SHOW_UBITS(re, &s->gb, 1);
685 LAST_SKIP_BITS(re, &s->gb, 1);
687 j = s->scantable.permutated[i];
689 block[j] = ((quant_matrix[j]^val) - val) << Al;
693 CLOSE_READER(re, &s->gb);
697 run = ((unsigned) code) >> 4;
704 UPDATE_CACHE(re, &s->gb);
705 run += SHOW_UBITS(re, &s->gb, val);
706 LAST_SKIP_BITS(re, &s->gb, val);
718 for (; i <= last; i++) {
719 j = s->scantable.permutated[i];
723 CLOSE_READER(re, &s->gb);
730 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
733 uint16_t (*buffer)[4];
734 int left[3], top[3], topleft[3];
735 const int linesize = s->linesize[0];
736 const int mask = (1 << s->bits) - 1;
740 s->restart_count = s->restart_interval;
742 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
743 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
744 buffer = s->ljpeg_buffer;
746 for (i = 0; i < 3; i++)
747 buffer[0][i] = 1 << (s->bits - 1);
749 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
750 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
752 if (s->interlaced && s->bottom_field)
753 ptr += linesize >> 1;
755 for (i = 0; i < 3; i++)
756 top[i] = left[i] = topleft[i] = buffer[0][i];
758 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
759 int modified_predictor = predictor;
761 if (s->restart_interval && !s->restart_count){
762 s->restart_count = s->restart_interval;
766 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
768 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
769 modified_predictor = 1;
771 for (i=0;i<nb_components;i++) {
775 top[i] = buffer[mb_x][i];
777 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
779 dc = mjpeg_decode_dc(s, s->dc_index[i]);
783 left[i] = buffer[mb_x][i] =
784 mask & (pred + (dc << point_transform));
787 if (s->restart_interval && !--s->restart_count) {
788 align_get_bits(&s->gb);
789 skip_bits(&s->gb, 16); /* skip RSTn */
794 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
795 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
796 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
797 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
799 } else if (s->pegasus_rct) {
800 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
801 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
802 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
803 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
806 for(i=0; i<nb_components; i++) {
807 int c= s->comp_index[i];
808 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
809 ptr[3*mb_x+2-c] = buffer[mb_x][i];
817 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
821 const int nb_components=s->nb_components;
822 int bits= (s->bits+7)&~7;
826 point_transform += bits - s->bits;
828 av_assert0(nb_components==1 || nb_components==3);
830 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
831 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
832 if (s->restart_interval && !s->restart_count){
833 s->restart_count = s->restart_interval;
838 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
839 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
840 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
841 for (i = 0; i < nb_components; i++) {
844 int n, h, v, x, y, c, j, linesize;
846 c = s->comp_index[i];
851 linesize= s->linesize[c];
853 if(bits>8) linesize /= 2;
858 dc = mjpeg_decode_dc(s, s->dc_index[i]);
862 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
865 pred= 1 << (bits - 1);
871 pred= ptr[-linesize];
873 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
877 if (s->interlaced && s->bottom_field)
878 ptr += linesize >> 1;
879 pred &= (-1)<<(8-s->bits);
880 *ptr= pred + (dc << point_transform);
882 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
885 pred= 1 << (bits - 1);
891 pred= ptr16[-linesize];
893 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
897 if (s->interlaced && s->bottom_field)
898 ptr16 += linesize >> 1;
899 pred &= (-1)<<(16-s->bits);
900 *ptr16= pred + (dc << point_transform);
909 for (i = 0; i < nb_components; i++) {
912 int n, h, v, x, y, c, j, linesize, dc;
914 c = s->comp_index[i];
919 linesize = s->linesize[c];
921 if(bits>8) linesize /= 2;
923 for (j = 0; j < n; j++) {
926 dc = mjpeg_decode_dc(s, s->dc_index[i]);
930 ptr = s->picture.data[c] +
931 (linesize * (v * mb_y + y)) +
932 (h * mb_x + x); //FIXME optimize this crap
933 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
935 pred &= (-1)<<(8-s->bits);
936 *ptr = pred + (dc << point_transform);
938 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
939 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
941 pred &= (-1)<<(16-s->bits);
942 *ptr16= pred + (dc << point_transform);
952 if (s->restart_interval && !--s->restart_count) {
953 align_get_bits(&s->gb);
954 skip_bits(&s->gb, 16); /* skip RSTn */
961 static av_always_inline void mjpeg_copy_block(uint8_t *dst, const uint8_t *src,
962 int linesize, int lowres)
965 case 0: copy_block8(dst, src, linesize, linesize, 8);
967 case 1: copy_block4(dst, src, linesize, linesize, 4);
969 case 2: copy_block2(dst, src, linesize, linesize, 2);
976 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
977 int Al, const uint8_t *mb_bitmask,
978 const AVFrame *reference)
981 uint8_t *data[MAX_COMPONENTS];
982 const uint8_t *reference_data[MAX_COMPONENTS];
983 int linesize[MAX_COMPONENTS];
984 GetBitContext mb_bitmask_gb;
987 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
989 if (s->flipped && s->avctx->lowres) {
990 av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with lowres\n");
994 for (i = 0; i < nb_components; i++) {
995 int c = s->comp_index[i];
996 data[c] = s->picture_ptr->data[c];
997 reference_data[c] = reference ? reference->data[c] : NULL;
998 linesize[c] = s->linesize[c];
999 s->coefs_finished[c] |= 1;
1000 if (s->flipped && !(s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
1001 // picture should be flipped upside-down for this codec
1002 int offset = (linesize[c] * (s->v_scount[i] *
1003 (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
1005 reference_data[c] += offset;
1010 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1011 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1012 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1014 if (s->restart_interval && !s->restart_count)
1015 s->restart_count = s->restart_interval;
1017 if (get_bits_left(&s->gb) < 0) {
1018 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1019 -get_bits_left(&s->gb));
1020 return AVERROR_INVALIDDATA;
1022 for (i = 0; i < nb_components; i++) {
1024 int n, h, v, x, y, c, j;
1026 n = s->nb_blocks[i];
1027 c = s->comp_index[i];
1032 for (j = 0; j < n; j++) {
1033 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1034 (h * mb_x + x) * 8) >> s->avctx->lowres);
1036 if (s->interlaced && s->bottom_field)
1037 block_offset += linesize[c] >> 1;
1038 ptr = data[c] + block_offset;
1039 if (!s->progressive) {
1041 mjpeg_copy_block(ptr, reference_data[c] + block_offset,
1042 linesize[c], s->avctx->lowres);
1044 s->dsp.clear_block(s->block);
1045 if (decode_block(s, s->block, i,
1046 s->dc_index[i], s->ac_index[i],
1047 s->quant_matrixes[s->quant_index[c]]) < 0) {
1048 av_log(s->avctx, AV_LOG_ERROR,
1049 "error y=%d x=%d\n", mb_y, mb_x);
1050 return AVERROR_INVALIDDATA;
1052 s->dsp.idct_put(ptr, linesize[c], s->block);
1055 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1057 DCTELEM *block = s->blocks[c][block_idx];
1059 block[0] += get_bits1(&s->gb) *
1060 s->quant_matrixes[s->quant_index[c]][0] << Al;
1061 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1062 s->quant_matrixes[s->quant_index[c]],
1064 av_log(s->avctx, AV_LOG_ERROR,
1065 "error y=%d x=%d\n", mb_y, mb_x);
1066 return AVERROR_INVALIDDATA;
1069 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1070 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1071 mb_x, mb_y, x, y, c, s->bottom_field,
1072 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1080 if (s->restart_interval) {
1082 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
1083 align_get_bits(&s->gb);
1084 for (i = 0; i < nb_components; i++) /* reset dc */
1085 s->last_dc[i] = 1024;
1088 i = 8 + ((-get_bits_count(&s->gb)) & 7);
1090 if (show_bits(&s->gb, i) == (1 << i) - 1) {
1091 int pos = get_bits_count(&s->gb);
1092 align_get_bits(&s->gb);
1093 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
1094 skip_bits(&s->gb, 8);
1095 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
1096 for (i = 0; i < nb_components; i++) /* reset dc */
1097 s->last_dc[i] = 1024;
1099 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
1107 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1108 int se, int Ah, int Al)
1112 int c = s->comp_index[0];
1113 uint8_t *data = s->picture.data[c];
1114 int linesize = s->linesize[c];
1116 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
1119 av_log(s->avctx, AV_LOG_ERROR, "SE %d is too large\n", se);
1120 return AVERROR_INVALIDDATA;
1124 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
1125 last_scan = !~s->coefs_finished[c];
1128 if (s->interlaced && s->bottom_field)
1129 data += linesize >> 1;
1131 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1132 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1133 int block_idx = mb_y * s->block_stride[c];
1134 DCTELEM (*block)[64] = &s->blocks[c][block_idx];
1135 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1136 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1139 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1140 quant_matrix, ss, se, Al, &EOBRUN);
1142 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1143 quant_matrix, ss, se, Al, &EOBRUN);
1145 av_log(s->avctx, AV_LOG_ERROR,
1146 "error y=%d x=%d\n", mb_y, mb_x);
1147 return AVERROR_INVALIDDATA;
1151 s->dsp.idct_put(ptr, linesize, *block);
1152 ptr += 8 >> s->avctx->lowres;
1159 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1160 const AVFrame *reference)
1162 int len, nb_components, i, h, v, predictor, point_transform;
1164 const int block_size = s->lossless ? 1 : 8;
1165 int ilv, prev_shift;
1167 if (!s->got_picture) {
1168 av_log(s->avctx, AV_LOG_WARNING,
1169 "Can not process SOS before SOF, skipping\n");
1173 av_assert0(s->picture_ptr->data[0]);
1174 /* XXX: verify len field validity */
1175 len = get_bits(&s->gb, 16);
1176 nb_components = get_bits(&s->gb, 8);
1177 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1178 av_log(s->avctx, AV_LOG_ERROR,
1179 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1180 return AVERROR_PATCHWELCOME;
1182 if (len != 6 + 2 * nb_components) {
1183 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1184 return AVERROR_INVALIDDATA;
1186 for (i = 0; i < nb_components; i++) {
1187 id = get_bits(&s->gb, 8) - 1;
1188 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1189 /* find component index */
1190 for (index = 0; index < s->nb_components; index++)
1191 if (id == s->component_id[index])
1193 if (index == s->nb_components) {
1194 av_log(s->avctx, AV_LOG_ERROR,
1195 "decode_sos: index(%d) out of components\n", index);
1196 return AVERROR_INVALIDDATA;
1198 /* Metasoft MJPEG codec has Cb and Cr swapped */
1199 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1200 && nb_components == 3 && s->nb_components == 3 && i)
1203 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1205 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1206 index = (index+2)%3;
1208 s->comp_index[i] = index;
1210 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1211 s->h_scount[i] = s->h_count[index];
1212 s->v_scount[i] = s->v_count[index];
1214 s->dc_index[i] = get_bits(&s->gb, 4);
1215 s->ac_index[i] = get_bits(&s->gb, 4);
1217 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1218 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1220 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))
1224 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1225 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1226 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1227 prev_shift = get_bits(&s->gb, 4); /* Ah */
1228 point_transform = get_bits(&s->gb, 4); /* Al */
1230 prev_shift = point_transform = 0;
1232 if (nb_components > 1) {
1233 /* interleaved stream */
1234 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1235 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1236 } else if (!s->ls) { /* skip this for JPEG-LS */
1237 h = s->h_max / s->h_scount[0];
1238 v = s->v_max / s->v_scount[0];
1239 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1240 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1241 s->nb_blocks[0] = 1;
1246 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1247 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1248 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1249 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1250 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1253 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1254 for (i = s->mjpb_skiptosod; i > 0; i--)
1255 skip_bits(&s->gb, 8);
1258 for (i = 0; i < nb_components; i++)
1259 s->last_dc[i] = 1024;
1262 av_assert0(s->picture_ptr == &s->picture);
1263 if (CONFIG_JPEGLS_DECODER && s->ls) {
1265 // reset_ls_coding_parameters(s, 0);
1267 if ((ret = ff_jpegls_decode_picture(s, predictor,
1268 point_transform, ilv)) < 0)
1272 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1275 if ((ret = ljpeg_decode_yuv_scan(s, predictor, point_transform)) < 0)
1280 if (s->progressive && predictor) {
1281 av_assert0(s->picture_ptr == &s->picture);
1282 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1284 point_transform)) < 0)
1287 if ((ret = mjpeg_decode_scan(s, nb_components,
1288 prev_shift, point_transform,
1289 mb_bitmask, reference)) < 0)
1294 if (s->interlaced &&
1295 get_bits_left(&s->gb) > 32 &&
1296 show_bits(&s->gb, 8) == 0xFF) {
1297 GetBitContext bak = s->gb;
1298 align_get_bits(&bak);
1299 if (show_bits(&bak, 16) == 0xFFD1) {
1300 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1302 skip_bits(&s->gb, 16);
1303 s->bottom_field ^= 1;
1312 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1313 return AVERROR_INVALIDDATA;
1316 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1318 if (get_bits(&s->gb, 16) != 4)
1319 return AVERROR_INVALIDDATA;
1320 s->restart_interval = get_bits(&s->gb, 16);
1321 s->restart_count = 0;
1322 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1323 s->restart_interval);
1328 static int mjpeg_decode_app(MJpegDecodeContext *s)
1332 len = get_bits(&s->gb, 16);
1334 return AVERROR_INVALIDDATA;
1335 if (8 * len > get_bits_left(&s->gb))
1336 return AVERROR_INVALIDDATA;
1338 id = get_bits_long(&s->gb, 32);
1339 id = av_be2ne32(id);
1342 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1343 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1345 /* Buggy AVID, it puts EOI only at every 10th frame. */
1346 /* Also, this fourcc is used by non-avid files too, it holds some
1347 information, but it's always present in AVID-created files. */
1348 if (id == AV_RL32("AVI1")) {
1354 4bytes field_size_less_padding
1357 i = get_bits(&s->gb, 8); len--;
1358 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1360 skip_bits(&s->gb, 8);
1361 skip_bits(&s->gb, 32);
1362 skip_bits(&s->gb, 32);
1370 if (id == AV_RL32("JFIF")) {
1371 int t_w, t_h, v1, v2;
1372 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1373 v1 = get_bits(&s->gb, 8);
1374 v2 = get_bits(&s->gb, 8);
1375 skip_bits(&s->gb, 8);
1377 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1378 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1380 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1381 av_log(s->avctx, AV_LOG_INFO,
1382 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1384 s->avctx->sample_aspect_ratio.num,
1385 s->avctx->sample_aspect_ratio.den);
1387 t_w = get_bits(&s->gb, 8);
1388 t_h = get_bits(&s->gb, 8);
1390 /* skip thumbnail */
1391 if (len -10 - (t_w * t_h * 3) > 0)
1392 len -= t_w * t_h * 3;
1398 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1399 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1400 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1401 skip_bits(&s->gb, 16); /* version */
1402 skip_bits(&s->gb, 16); /* flags0 */
1403 skip_bits(&s->gb, 16); /* flags1 */
1404 skip_bits(&s->gb, 8); /* transform */
1409 if (id == AV_RL32("LJIF")) {
1410 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1411 av_log(s->avctx, AV_LOG_INFO,
1412 "Pegasus lossless jpeg header found\n");
1413 skip_bits(&s->gb, 16); /* version ? */
1414 skip_bits(&s->gb, 16); /* unknwon always 0? */
1415 skip_bits(&s->gb, 16); /* unknwon always 0? */
1416 skip_bits(&s->gb, 16); /* unknwon always 0? */
1417 switch (get_bits(&s->gb, 8)) {
1427 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1434 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1435 id = get_bits_long(&s->gb, 32);
1436 id = av_be2ne32(id);
1439 if (id == AV_RL32("mjpg")) {
1441 skip_bits(&s->gb, 32); /* field size */
1442 skip_bits(&s->gb, 32); /* pad field size */
1443 skip_bits(&s->gb, 32); /* next off */
1444 skip_bits(&s->gb, 32); /* quant off */
1445 skip_bits(&s->gb, 32); /* huff off */
1446 skip_bits(&s->gb, 32); /* image off */
1447 skip_bits(&s->gb, 32); /* scan off */
1448 skip_bits(&s->gb, 32); /* data off */
1450 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1451 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1456 /* slow but needed for extreme adobe jpegs */
1458 av_log(s->avctx, AV_LOG_ERROR,
1459 "mjpeg: error, decode_app parser read over the end\n");
1461 skip_bits(&s->gb, 8);
1466 static int mjpeg_decode_com(MJpegDecodeContext *s)
1468 int len = get_bits(&s->gb, 16);
1469 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1470 char *cbuf = av_malloc(len - 1);
1473 for (i = 0; i < len - 2; i++)
1474 cbuf[i] = get_bits(&s->gb, 8);
1475 if (i > 0 && cbuf[i - 1] == '\n')
1480 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1481 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1483 /* buggy avid, it puts EOI only at every 10th frame */
1484 if (!strcmp(cbuf, "AVID")) {
1486 } else if (!strcmp(cbuf, "CS=ITU601"))
1488 else if ((len > 31 && !strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32)) ||
1489 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1499 /* return the 8 bit start code value and update the search
1500 state. Return -1 if no start code found */
1501 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1503 const uint8_t *buf_ptr;
1508 buf_ptr = *pbuf_ptr;
1509 while (buf_ptr < buf_end) {
1512 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1520 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1521 *pbuf_ptr = buf_ptr;
1525 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1526 const uint8_t **buf_ptr, const uint8_t *buf_end,
1527 const uint8_t **unescaped_buf_ptr,
1528 int *unescaped_buf_size)
1531 start_code = find_marker(buf_ptr, buf_end);
1533 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1535 return AVERROR(ENOMEM);
1537 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1538 if (start_code == SOS && !s->ls) {
1539 const uint8_t *src = *buf_ptr;
1540 uint8_t *dst = s->buffer;
1542 while (src < buf_end) {
1543 uint8_t x = *(src++);
1546 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1548 while (src < buf_end && x == 0xff)
1551 if (x >= 0xd0 && x <= 0xd7)
1558 *unescaped_buf_ptr = s->buffer;
1559 *unescaped_buf_size = dst - s->buffer;
1560 memset(s->buffer + *unescaped_buf_size, 0,
1561 FF_INPUT_BUFFER_PADDING_SIZE);
1563 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1564 (buf_end - *buf_ptr) - (dst - s->buffer));
1565 } else if (start_code == SOS && s->ls) {
1566 const uint8_t *src = *buf_ptr;
1567 uint8_t *dst = s->buffer;
1575 while (src + t < buf_end) {
1576 uint8_t x = src[t++];
1578 while ((src + t < buf_end) && x == 0xff)
1587 init_put_bits(&pb, dst, t);
1589 /* unescape bitstream */
1591 uint8_t x = src[b++];
1592 put_bits(&pb, 8, x);
1595 put_bits(&pb, 7, x);
1599 flush_put_bits(&pb);
1601 *unescaped_buf_ptr = dst;
1602 *unescaped_buf_size = (bit_count + 7) >> 3;
1603 memset(s->buffer + *unescaped_buf_size, 0,
1604 FF_INPUT_BUFFER_PADDING_SIZE);
1606 *unescaped_buf_ptr = *buf_ptr;
1607 *unescaped_buf_size = buf_end - *buf_ptr;
1613 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1616 const uint8_t *buf = avpkt->data;
1617 int buf_size = avpkt->size;
1618 MJpegDecodeContext *s = avctx->priv_data;
1619 const uint8_t *buf_end, *buf_ptr;
1620 const uint8_t *unescaped_buf_ptr;
1621 int unescaped_buf_size;
1625 AVFrame *picture = data;
1628 buf_end = buf + buf_size;
1629 while (buf_ptr < buf_end) {
1630 /* find start next marker */
1631 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1633 &unescaped_buf_size);
1635 if (start_code < 0) {
1637 } else if (unescaped_buf_size > (1U<<28)) {
1638 av_log(avctx, AV_LOG_ERROR, "MJPEG packet 0x%x too big (0x%x/0x%x), corrupt data?\n",
1639 start_code, unescaped_buf_size, buf_size);
1640 return AVERROR_INVALIDDATA;
1642 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1643 start_code, buf_end - buf_ptr);
1645 init_get_bits(&s->gb, unescaped_buf_ptr, unescaped_buf_size * 8);
1647 s->start_code = start_code;
1648 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1649 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1651 /* process markers */
1652 if (start_code >= 0xd0 && start_code <= 0xd7)
1653 av_log(avctx, AV_LOG_DEBUG,
1654 "restart marker: %d\n", start_code & 0x0f);
1656 else if (start_code >= APP0 && start_code <= APP15)
1657 mjpeg_decode_app(s);
1659 else if (start_code == COM)
1660 mjpeg_decode_com(s);
1663 switch (start_code) {
1665 s->restart_interval = 0;
1666 s->restart_count = 0;
1667 /* nothing to do on SOI */
1670 ff_mjpeg_decode_dqt(s);
1673 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1674 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1683 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1690 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1697 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1704 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1708 if (!CONFIG_JPEGLS_DECODER ||
1709 (ret = ff_jpegls_decode_lse(s)) < 0)
1715 if (!s->got_picture) {
1716 av_log(avctx, AV_LOG_WARNING,
1717 "Found EOI before any SOF, ignoring\n");
1720 if (s->interlaced) {
1721 s->bottom_field ^= 1;
1722 /* if not bottom field, do not output image yet */
1723 if (s->bottom_field == !s->interlace_polarity)
1726 *picture = *s->picture_ptr;
1731 picture->quality = FFMAX3(s->qscale[0],
1734 picture->qstride = 0;
1735 picture->qscale_table = s->qscale_table;
1736 memset(picture->qscale_table, picture->quality,
1737 (s->width + 15) / 16);
1738 if (avctx->debug & FF_DEBUG_QP)
1739 av_log(avctx, AV_LOG_DEBUG,
1740 "QP: %d\n", picture->quality);
1741 picture->quality *= FF_QP2LAMBDA;
1746 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1747 (avctx->err_recognition & AV_EF_EXPLODE))
1751 mjpeg_decode_dri(s);
1763 av_log(avctx, AV_LOG_ERROR,
1764 "mjpeg: unsupported coding type (%x)\n", start_code);
1768 /* eof process start code */
1769 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1770 av_log(avctx, AV_LOG_DEBUG,
1771 "marker parser used %d bytes (%d bits)\n",
1772 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1775 if (s->got_picture) {
1776 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1779 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1780 return AVERROR_INVALIDDATA;
1786 uint8_t *line = s->picture_ptr->data[s->upscale_h];
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_YUVJ440P ||
1790 avctx->pix_fmt == AV_PIX_FMT_YUV440P);
1791 for (i = 0; i < s->chroma_height; i++) {
1792 for (index = s->width - 1; index; index--)
1793 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
1794 line += s->linesize[s->upscale_h];
1798 uint8_t *dst = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(s->height - 1) * s->linesize[s->upscale_v]];
1799 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
1800 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1801 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
1802 avctx->pix_fmt == AV_PIX_FMT_YUV422P);
1803 for (i = s->height - 1; i; i--) {
1804 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[i / 2 * s->linesize[s->upscale_v]];
1805 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(i + 1) / 2 * s->linesize[s->upscale_v]];
1807 memcpy(dst, src1, s->width);
1809 for (index = 0; index < s->width; index++)
1810 dst[index] = (src1[index] + src2[index]) >> 1;
1812 dst -= s->linesize[s->upscale_v];
1815 if (s->flipped && (s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
1816 int hshift, vshift, j;
1817 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
1818 for (index=0; index<4; index++) {
1819 uint8_t *dst = s->picture_ptr->data[index];
1822 if(index && index<3){
1823 w = -((-w) >> hshift);
1824 h = -((-h) >> vshift);
1827 uint8_t *dst2 = dst + s->linesize[index]*(h-1);
1828 for (i=0; i<h/2; i++) {
1830 FFSWAP(int, dst[j], dst2[j]);
1831 dst += s->linesize[index];
1832 dst2 -= s->linesize[index];
1838 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %td bytes\n",
1840 // return buf_end - buf_ptr;
1841 return buf_ptr - buf;
1844 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1846 MJpegDecodeContext *s = avctx->priv_data;
1849 if (s->picture_ptr && s->picture_ptr->data[0])
1850 avctx->release_buffer(avctx, s->picture_ptr);
1853 av_free(s->qscale_table);
1854 av_freep(&s->ljpeg_buffer);
1855 s->ljpeg_buffer_size = 0;
1857 for (i = 0; i < 3; i++) {
1858 for (j = 0; j < 4; j++)
1859 ff_free_vlc(&s->vlcs[i][j]);
1861 for (i = 0; i < MAX_COMPONENTS; i++) {
1862 av_freep(&s->blocks[i]);
1863 av_freep(&s->last_nnz[i]);
1868 static void decode_flush(AVCodecContext *avctx)
1870 MJpegDecodeContext *s = avctx->priv_data;
1874 #if CONFIG_MJPEG_DECODER
1875 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1876 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1877 static const AVOption options[] = {
1878 { "extern_huff", "Use external huffman table.",
1879 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
1883 static const AVClass mjpegdec_class = {
1884 .class_name = "MJPEG decoder",
1885 .item_name = av_default_item_name,
1887 .version = LIBAVUTIL_VERSION_INT,
1890 AVCodec ff_mjpeg_decoder = {
1892 .type = AVMEDIA_TYPE_VIDEO,
1893 .id = AV_CODEC_ID_MJPEG,
1894 .priv_data_size = sizeof(MJpegDecodeContext),
1895 .init = ff_mjpeg_decode_init,
1896 .close = ff_mjpeg_decode_end,
1897 .decode = ff_mjpeg_decode_frame,
1898 .flush = decode_flush,
1899 .capabilities = CODEC_CAP_DR1,
1901 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1902 .priv_class = &mjpegdec_class,
1905 #if CONFIG_THP_DECODER
1906 AVCodec ff_thp_decoder = {
1908 .type = AVMEDIA_TYPE_VIDEO,
1909 .id = AV_CODEC_ID_THP,
1910 .priv_data_size = sizeof(MJpegDecodeContext),
1911 .init = ff_mjpeg_decode_init,
1912 .close = ff_mjpeg_decode_end,
1913 .decode = ff_mjpeg_decode_frame,
1914 .flush = decode_flush,
1915 .capabilities = CODEC_CAP_DR1,
1917 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),