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"
42 #include "jpeglsdec.h"
45 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
46 const uint8_t *val_table, int nb_codes,
47 int use_static, int is_ac)
49 uint8_t huff_size[256] = { 0 };
50 uint16_t huff_code[256];
51 uint16_t huff_sym[256];
54 av_assert0(nb_codes <= 256);
56 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
58 for (i = 0; i < 256; i++)
59 huff_sym[i] = i + 16 * is_ac;
62 huff_sym[0] = 16 * 256;
64 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
65 huff_code, 2, 2, huff_sym, 2, 2, use_static);
68 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
70 build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
71 avpriv_mjpeg_val_dc, 12, 0, 0);
72 build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
73 avpriv_mjpeg_val_dc, 12, 0, 0);
74 build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
75 avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
76 build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
77 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
78 build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
79 avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
80 build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
81 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
84 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
86 MJpegDecodeContext *s = avctx->priv_data;
89 s->picture_ptr = &s->picture;
90 avcodec_get_frame_defaults(&s->picture);
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 av_log_missing_feature(s->avctx,
264 "For JPEG-LS anything except <= 8 bits/component"
265 " or 16-bit gray", 0);
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 av_log_missing_feature(s->avctx, "Subsampling in JPEG-LS", 0);
299 return AVERROR_PATCHWELCOME;
302 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && nb_components==3)
304 else if (!s->lossless)
307 /* if different size, realloc/alloc picture */
308 if ( width != s->width || height != s->height
309 || memcmp(s->h_count, h_count, sizeof(h_count))
310 || memcmp(s->v_count, v_count, sizeof(v_count))) {
311 av_freep(&s->qscale_table);
315 memcpy(s->h_count, h_count, sizeof(h_count));
316 memcpy(s->v_count, v_count, sizeof(v_count));
320 /* test interlaced mode */
321 if (s->first_picture &&
322 s->org_height != 0 &&
323 s->height < ((s->org_height * 3) / 4)) {
325 s->bottom_field = s->interlace_polarity;
326 s->picture_ptr->interlaced_frame = 1;
327 s->picture_ptr->top_field_first = !s->interlace_polarity;
331 avcodec_set_dimensions(s->avctx, width, height);
333 s->qscale_table = av_mallocz((s->width + 15) / 16);
334 s->first_picture = 0;
337 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
338 if (s->progressive) {
339 av_log_ask_for_sample(s->avctx, "progressively coded interlaced pictures not supported\n");
340 return AVERROR_INVALIDDATA;
343 /* XXX: not complete test ! */
344 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
345 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
346 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
347 (s->h_count[3] << 4) | s->v_count[3];
348 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
349 /* NOTE we do not allocate pictures large enough for the possible
350 * padding of h/v_count being 4 */
351 if (!(pix_fmt_id & 0xD0D0D0D0))
352 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
353 if (!(pix_fmt_id & 0x0D0D0D0D))
354 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
356 switch (pix_fmt_id) {
359 s->avctx->pix_fmt = AV_PIX_FMT_BGR24;
361 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
362 s->avctx->pix_fmt = AV_PIX_FMT_GBR24P;
364 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
365 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
368 av_assert0(s->nb_components == 3);
372 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
373 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
375 s->upscale_h = (pix_fmt_id == 0x22122100);
376 s->chroma_height = s->height;
380 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
381 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
382 s->upscale_v = (pix_fmt_id == 0x22211200);
384 s->chroma_height = s->height;
387 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
388 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
391 s->chroma_height = s->height / 2;
403 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
405 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
410 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
411 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
412 s->upscale_h = (pix_fmt_id == 0x22211100) * 2 + (pix_fmt_id == 0x22112100);
413 s->chroma_height = s->height / 2;
416 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
417 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
421 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
422 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
423 s->upscale_v = (pix_fmt_id == 0x22121100) + 1;
426 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
427 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
430 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
431 return AVERROR_PATCHWELCOME;
433 if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
434 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
435 return AVERROR_PATCHWELCOME;
438 s->upscale_h = s->upscale_v = 0;
439 if (s->nb_components > 1)
440 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
441 else if (s->bits <= 8)
442 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
444 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
447 if (s->picture_ptr->data[0])
448 s->avctx->release_buffer(s->avctx, s->picture_ptr);
450 if (ff_get_buffer(s->avctx, s->picture_ptr) < 0) {
451 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
454 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
455 s->picture_ptr->key_frame = 1;
458 for (i = 0; i < 3; i++)
459 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
461 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
462 s->width, s->height, s->linesize[0], s->linesize[1],
463 s->interlaced, s->avctx->height);
465 if (len != (8 + (3 * nb_components)))
466 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
469 /* totally blank picture as progressive JPEG will only add details to it */
470 if (s->progressive) {
471 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
472 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
473 for (i = 0; i < s->nb_components; i++) {
474 int size = bw * bh * s->h_count[i] * s->v_count[i];
475 av_freep(&s->blocks[i]);
476 av_freep(&s->last_nnz[i]);
477 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
478 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
479 s->block_stride[i] = bw * s->h_count[i];
481 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
486 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
489 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
491 av_log(s->avctx, AV_LOG_WARNING,
492 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
493 0, dc_index, &s->vlcs[0][dc_index]);
498 return get_xbits(&s->gb, code);
503 /* decode block and dequantize */
504 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
505 int dc_index, int ac_index, int16_t *quant_matrix)
507 int code, i, j, level, val;
510 val = mjpeg_decode_dc(s, dc_index);
512 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
513 return AVERROR_INVALIDDATA;
515 val = val * quant_matrix[0] + s->last_dc[component];
516 s->last_dc[component] = val;
520 {OPEN_READER(re, &s->gb);
522 UPDATE_CACHE(re, &s->gb);
523 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
525 i += ((unsigned)code) >> 4;
528 if (code > MIN_CACHE_BITS - 16)
529 UPDATE_CACHE(re, &s->gb);
532 int cache = GET_CACHE(re, &s->gb);
533 int sign = (~cache) >> 31;
534 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
537 LAST_SKIP_BITS(re, &s->gb, code);
540 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
541 return AVERROR_INVALIDDATA;
543 j = s->scantable.permutated[i];
544 block[j] = level * quant_matrix[j];
547 CLOSE_READER(re, &s->gb);}
552 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
553 int component, int dc_index,
554 int16_t *quant_matrix, int Al)
557 s->dsp.clear_block(block);
558 val = mjpeg_decode_dc(s, dc_index);
560 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
561 return AVERROR_INVALIDDATA;
563 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
564 s->last_dc[component] = val;
569 /* decode block and dequantize - progressive JPEG version */
570 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
571 uint8_t *last_nnz, int ac_index,
572 int16_t *quant_matrix,
573 int ss, int se, int Al, int *EOBRUN)
575 int code, i, j, level, val, run;
583 OPEN_READER(re, &s->gb);
584 for (i = ss; ; i++) {
585 UPDATE_CACHE(re, &s->gb);
586 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
588 run = ((unsigned) code) >> 4;
592 if (code > MIN_CACHE_BITS - 16)
593 UPDATE_CACHE(re, &s->gb);
596 int cache = GET_CACHE(re, &s->gb);
597 int sign = (~cache) >> 31;
598 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
601 LAST_SKIP_BITS(re, &s->gb, code);
605 j = s->scantable.permutated[se];
606 block[j] = level * quant_matrix[j] << Al;
609 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
610 return AVERROR_INVALIDDATA;
612 j = s->scantable.permutated[i];
613 block[j] = level * quant_matrix[j] << Al;
615 if (run == 0xF) {// ZRL - skip 15 coefficients
618 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
619 return AVERROR_INVALIDDATA;
624 UPDATE_CACHE(re, &s->gb);
625 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
626 LAST_SKIP_BITS(re, &s->gb, run);
633 CLOSE_READER(re, &s->gb);
642 #define REFINE_BIT(j) { \
643 UPDATE_CACHE(re, &s->gb); \
644 sign = block[j] >> 15; \
645 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
646 ((quant_matrix[j] ^ sign) - sign) << Al; \
647 LAST_SKIP_BITS(re, &s->gb, 1); \
655 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
660 j = s->scantable.permutated[i]; \
663 else if (run-- == 0) \
667 /* decode block and dequantize - progressive JPEG refinement pass */
668 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
670 int ac_index, int16_t *quant_matrix,
671 int ss, int se, int Al, int *EOBRUN)
673 int code, i = ss, j, sign, val, run;
674 int last = FFMIN(se, *last_nnz);
676 OPEN_READER(re, &s->gb);
681 UPDATE_CACHE(re, &s->gb);
682 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
685 run = ((unsigned) code) >> 4;
686 UPDATE_CACHE(re, &s->gb);
687 val = SHOW_UBITS(re, &s->gb, 1);
688 LAST_SKIP_BITS(re, &s->gb, 1);
690 j = s->scantable.permutated[i];
692 block[j] = ((quant_matrix[j]^val) - val) << Al;
696 CLOSE_READER(re, &s->gb);
700 run = ((unsigned) code) >> 4;
707 UPDATE_CACHE(re, &s->gb);
708 run += SHOW_UBITS(re, &s->gb, val);
709 LAST_SKIP_BITS(re, &s->gb, val);
721 for (; i <= last; i++) {
722 j = s->scantable.permutated[i];
726 CLOSE_READER(re, &s->gb);
733 static void handle_rstn(MJpegDecodeContext *s, int nb_components)
736 if (s->restart_interval) {
738 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
739 align_get_bits(&s->gb);
740 for (i = 0; i < nb_components; i++) /* reset dc */
741 s->last_dc[i] = 1024;
744 i = 8 + ((-get_bits_count(&s->gb)) & 7);
746 if (s->restart_count == 0 && show_bits(&s->gb, i) == (1 << i) - 1) {
747 int pos = get_bits_count(&s->gb);
748 align_get_bits(&s->gb);
749 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
750 skip_bits(&s->gb, 8);
751 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
752 for (i = 0; i < nb_components; i++) /* reset dc */
753 s->last_dc[i] = 1024;
755 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
760 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
763 uint16_t (*buffer)[4];
764 int left[3], top[3], topleft[3];
765 const int linesize = s->linesize[0];
766 const int mask = (1 << s->bits) - 1;
770 s->restart_count = s->restart_interval;
772 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
773 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
774 buffer = s->ljpeg_buffer;
776 for (i = 0; i < 3; i++)
777 buffer[0][i] = 1 << (s->bits - 1);
779 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
780 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
782 if (s->interlaced && s->bottom_field)
783 ptr += linesize >> 1;
785 for (i = 0; i < 3; i++)
786 top[i] = left[i] = topleft[i] = buffer[0][i];
788 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
789 int modified_predictor = predictor;
791 if (s->restart_interval && !s->restart_count){
792 s->restart_count = s->restart_interval;
796 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
798 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
799 modified_predictor = 1;
801 for (i=0;i<nb_components;i++) {
805 top[i] = buffer[mb_x][i];
807 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
809 dc = mjpeg_decode_dc(s, s->dc_index[i]);
813 left[i] = buffer[mb_x][i] =
814 mask & (pred + (dc << point_transform));
817 if (s->restart_interval && !--s->restart_count) {
818 align_get_bits(&s->gb);
819 skip_bits(&s->gb, 16); /* skip RSTn */
824 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
825 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
826 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
827 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
829 } else if (s->pegasus_rct) {
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]) >> 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];
836 for(i=0; i<nb_components; i++) {
837 int c= s->comp_index[i];
838 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
839 ptr[3*mb_x+2-c] = buffer[mb_x][i];
847 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
851 const int nb_components=s->nb_components;
852 int bits= (s->bits+7)&~7;
856 point_transform += bits - s->bits;
858 av_assert0(nb_components>=1 && nb_components<=3);
860 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
861 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
862 if (s->restart_interval && !s->restart_count){
863 s->restart_count = s->restart_interval;
868 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
869 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
870 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
871 for (i = 0; i < nb_components; i++) {
874 int n, h, v, x, y, c, j, linesize;
876 c = s->comp_index[i];
881 linesize= s->linesize[c];
883 if(bits>8) linesize /= 2;
888 dc = mjpeg_decode_dc(s, s->dc_index[i]);
892 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
895 pred= 1 << (bits - 1);
901 pred= ptr[-linesize];
903 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
907 if (s->interlaced && s->bottom_field)
908 ptr += linesize >> 1;
909 pred &= (-1)<<(8-s->bits);
910 *ptr= pred + (dc << point_transform);
912 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
915 pred= 1 << (bits - 1);
921 pred= ptr16[-linesize];
923 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
927 if (s->interlaced && s->bottom_field)
928 ptr16 += linesize >> 1;
929 pred &= (-1)<<(16-s->bits);
930 *ptr16= pred + (dc << point_transform);
939 for (i = 0; i < nb_components; i++) {
942 int n, h, v, x, y, c, j, linesize, dc;
944 c = s->comp_index[i];
949 linesize = s->linesize[c];
951 if(bits>8) linesize /= 2;
953 for (j = 0; j < n; j++) {
956 dc = mjpeg_decode_dc(s, s->dc_index[i]);
960 ptr = s->picture.data[c] +
961 (linesize * (v * mb_y + y)) +
962 (h * mb_x + x); //FIXME optimize this crap
963 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
965 pred &= (-1)<<(8-s->bits);
966 *ptr = pred + (dc << point_transform);
968 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
969 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
971 pred &= (-1)<<(16-s->bits);
972 *ptr16= pred + (dc << point_transform);
982 if (s->restart_interval && !--s->restart_count) {
983 align_get_bits(&s->gb);
984 skip_bits(&s->gb, 16); /* skip RSTn */
991 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
992 uint8_t *dst, const uint8_t *src,
993 int linesize, int lowres)
996 case 0: s->dsp.put_pixels_tab[1][0](dst, src, linesize, 8);
998 case 1: copy_block4(dst, src, linesize, linesize, 4);
1000 case 2: copy_block2(dst, src, linesize, linesize, 2);
1002 case 3: *dst = *src;
1007 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1008 int Al, const uint8_t *mb_bitmask,
1009 const AVFrame *reference)
1012 uint8_t *data[MAX_COMPONENTS];
1013 const uint8_t *reference_data[MAX_COMPONENTS];
1014 int linesize[MAX_COMPONENTS];
1015 GetBitContext mb_bitmask_gb;
1018 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1020 if (s->flipped && s->avctx->lowres) {
1021 av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with lowres\n");
1025 for (i = 0; i < nb_components; i++) {
1026 int c = s->comp_index[i];
1027 data[c] = s->picture_ptr->data[c];
1028 reference_data[c] = reference ? reference->data[c] : NULL;
1029 linesize[c] = s->linesize[c];
1030 s->coefs_finished[c] |= 1;
1031 if (s->flipped && !(s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
1032 // picture should be flipped upside-down for this codec
1033 int offset = (linesize[c] * (s->v_scount[i] *
1034 (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
1036 reference_data[c] += offset;
1041 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1042 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1043 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1045 if (s->restart_interval && !s->restart_count)
1046 s->restart_count = s->restart_interval;
1048 if (get_bits_left(&s->gb) < 0) {
1049 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1050 -get_bits_left(&s->gb));
1051 return AVERROR_INVALIDDATA;
1053 for (i = 0; i < nb_components; i++) {
1055 int n, h, v, x, y, c, j;
1057 n = s->nb_blocks[i];
1058 c = s->comp_index[i];
1063 for (j = 0; j < n; j++) {
1064 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1065 (h * mb_x + x) * 8) >> s->avctx->lowres);
1067 if (s->interlaced && s->bottom_field)
1068 block_offset += linesize[c] >> 1;
1069 ptr = data[c] + block_offset;
1070 if (!s->progressive) {
1072 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1073 linesize[c], s->avctx->lowres);
1076 s->dsp.clear_block(s->block);
1077 if (decode_block(s, s->block, i,
1078 s->dc_index[i], s->ac_index[i],
1079 s->quant_matrixes[s->quant_index[c]]) < 0) {
1080 av_log(s->avctx, AV_LOG_ERROR,
1081 "error y=%d x=%d\n", mb_y, mb_x);
1082 return AVERROR_INVALIDDATA;
1084 s->dsp.idct_put(ptr, linesize[c], s->block);
1087 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1089 int16_t *block = s->blocks[c][block_idx];
1091 block[0] += get_bits1(&s->gb) *
1092 s->quant_matrixes[s->quant_index[c]][0] << Al;
1093 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1094 s->quant_matrixes[s->quant_index[c]],
1096 av_log(s->avctx, AV_LOG_ERROR,
1097 "error y=%d x=%d\n", mb_y, mb_x);
1098 return AVERROR_INVALIDDATA;
1101 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1102 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1103 mb_x, mb_y, x, y, c, s->bottom_field,
1104 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1112 handle_rstn(s, nb_components);
1118 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1119 int se, int Ah, int Al)
1123 int c = s->comp_index[0];
1124 uint8_t *data = s->picture.data[c];
1125 int linesize = s->linesize[c];
1127 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
1130 av_log(s->avctx, AV_LOG_ERROR, "SE %d is too large\n", se);
1131 return AVERROR_INVALIDDATA;
1135 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
1136 last_scan = !~s->coefs_finished[c];
1139 if (s->interlaced && s->bottom_field)
1140 data += linesize >> 1;
1142 s->restart_count = 0;
1144 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1145 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1146 int block_idx = mb_y * s->block_stride[c];
1147 int16_t (*block)[64] = &s->blocks[c][block_idx];
1148 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1149 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1151 if (s->restart_interval && !s->restart_count)
1152 s->restart_count = s->restart_interval;
1155 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1156 quant_matrix, ss, se, Al, &EOBRUN);
1158 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1159 quant_matrix, ss, se, Al, &EOBRUN);
1161 av_log(s->avctx, AV_LOG_ERROR,
1162 "error y=%d x=%d\n", mb_y, mb_x);
1163 return AVERROR_INVALIDDATA;
1167 s->dsp.idct_put(ptr, linesize, *block);
1168 ptr += 8 >> s->avctx->lowres;
1176 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1177 const AVFrame *reference)
1179 int len, nb_components, i, h, v, predictor, point_transform;
1181 const int block_size = s->lossless ? 1 : 8;
1182 int ilv, prev_shift;
1184 if (!s->got_picture) {
1185 av_log(s->avctx, AV_LOG_WARNING,
1186 "Can not process SOS before SOF, skipping\n");
1190 av_assert0(s->picture_ptr->data[0]);
1191 /* XXX: verify len field validity */
1192 len = get_bits(&s->gb, 16);
1193 nb_components = get_bits(&s->gb, 8);
1194 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1195 av_log(s->avctx, AV_LOG_ERROR,
1196 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1197 return AVERROR_PATCHWELCOME;
1199 if (len != 6 + 2 * nb_components) {
1200 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1201 return AVERROR_INVALIDDATA;
1203 for (i = 0; i < nb_components; i++) {
1204 id = get_bits(&s->gb, 8) - 1;
1205 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1206 /* find component index */
1207 for (index = 0; index < s->nb_components; index++)
1208 if (id == s->component_id[index])
1210 if (index == s->nb_components) {
1211 av_log(s->avctx, AV_LOG_ERROR,
1212 "decode_sos: index(%d) out of components\n", index);
1213 return AVERROR_INVALIDDATA;
1215 /* Metasoft MJPEG codec has Cb and Cr swapped */
1216 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1217 && nb_components == 3 && s->nb_components == 3 && i)
1220 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1222 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1223 index = (index+2)%3;
1225 s->comp_index[i] = index;
1227 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1228 s->h_scount[i] = s->h_count[index];
1229 s->v_scount[i] = s->v_count[index];
1231 s->dc_index[i] = get_bits(&s->gb, 4);
1232 s->ac_index[i] = get_bits(&s->gb, 4);
1234 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1235 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1237 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))
1241 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1242 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1243 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1244 prev_shift = get_bits(&s->gb, 4); /* Ah */
1245 point_transform = get_bits(&s->gb, 4); /* Al */
1247 prev_shift = point_transform = 0;
1249 if (nb_components > 1) {
1250 /* interleaved stream */
1251 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1252 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1253 } else if (!s->ls) { /* skip this for JPEG-LS */
1254 h = s->h_max / s->h_scount[0];
1255 v = s->v_max / s->v_scount[0];
1256 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1257 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1258 s->nb_blocks[0] = 1;
1263 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1264 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1265 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1266 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1267 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1270 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1271 for (i = s->mjpb_skiptosod; i > 0; i--)
1272 skip_bits(&s->gb, 8);
1275 for (i = 0; i < nb_components; i++)
1276 s->last_dc[i] = 1024;
1279 av_assert0(s->picture_ptr == &s->picture);
1280 if (CONFIG_JPEGLS_DECODER && s->ls) {
1282 // reset_ls_coding_parameters(s, 0);
1284 if ((ret = ff_jpegls_decode_picture(s, predictor,
1285 point_transform, ilv)) < 0)
1289 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1292 if ((ret = ljpeg_decode_yuv_scan(s, predictor, point_transform)) < 0)
1297 if (s->progressive && predictor) {
1298 av_assert0(s->picture_ptr == &s->picture);
1299 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1301 point_transform)) < 0)
1304 if ((ret = mjpeg_decode_scan(s, nb_components,
1305 prev_shift, point_transform,
1306 mb_bitmask, reference)) < 0)
1311 if (s->interlaced &&
1312 get_bits_left(&s->gb) > 32 &&
1313 show_bits(&s->gb, 8) == 0xFF) {
1314 GetBitContext bak = s->gb;
1315 align_get_bits(&bak);
1316 if (show_bits(&bak, 16) == 0xFFD1) {
1317 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1319 skip_bits(&s->gb, 16);
1320 s->bottom_field ^= 1;
1329 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1330 return AVERROR_INVALIDDATA;
1333 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1335 if (get_bits(&s->gb, 16) != 4)
1336 return AVERROR_INVALIDDATA;
1337 s->restart_interval = get_bits(&s->gb, 16);
1338 s->restart_count = 0;
1339 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1340 s->restart_interval);
1345 static int mjpeg_decode_app(MJpegDecodeContext *s)
1349 len = get_bits(&s->gb, 16);
1351 return AVERROR_INVALIDDATA;
1352 if (8 * len > get_bits_left(&s->gb))
1353 return AVERROR_INVALIDDATA;
1355 id = get_bits_long(&s->gb, 32);
1356 id = av_be2ne32(id);
1359 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1360 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1362 /* Buggy AVID, it puts EOI only at every 10th frame. */
1363 /* Also, this fourcc is used by non-avid files too, it holds some
1364 information, but it's always present in AVID-created files. */
1365 if (id == AV_RL32("AVI1")) {
1371 4bytes field_size_less_padding
1374 i = get_bits(&s->gb, 8); len--;
1375 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1377 skip_bits(&s->gb, 8);
1378 skip_bits(&s->gb, 32);
1379 skip_bits(&s->gb, 32);
1387 if (id == AV_RL32("JFIF")) {
1388 int t_w, t_h, v1, v2;
1389 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1390 v1 = get_bits(&s->gb, 8);
1391 v2 = get_bits(&s->gb, 8);
1392 skip_bits(&s->gb, 8);
1394 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1395 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1397 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1398 av_log(s->avctx, AV_LOG_INFO,
1399 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1401 s->avctx->sample_aspect_ratio.num,
1402 s->avctx->sample_aspect_ratio.den);
1404 t_w = get_bits(&s->gb, 8);
1405 t_h = get_bits(&s->gb, 8);
1407 /* skip thumbnail */
1408 if (len -10 - (t_w * t_h * 3) > 0)
1409 len -= t_w * t_h * 3;
1415 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1416 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1417 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1418 skip_bits(&s->gb, 16); /* version */
1419 skip_bits(&s->gb, 16); /* flags0 */
1420 skip_bits(&s->gb, 16); /* flags1 */
1421 skip_bits(&s->gb, 8); /* transform */
1426 if (id == AV_RL32("LJIF")) {
1427 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1428 av_log(s->avctx, AV_LOG_INFO,
1429 "Pegasus lossless jpeg header found\n");
1430 skip_bits(&s->gb, 16); /* version ? */
1431 skip_bits(&s->gb, 16); /* unknown always 0? */
1432 skip_bits(&s->gb, 16); /* unknown always 0? */
1433 skip_bits(&s->gb, 16); /* unknown always 0? */
1434 switch (get_bits(&s->gb, 8)) {
1444 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1451 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1452 id = get_bits_long(&s->gb, 32);
1453 id = av_be2ne32(id);
1456 if (id == AV_RL32("mjpg")) {
1458 skip_bits(&s->gb, 32); /* field size */
1459 skip_bits(&s->gb, 32); /* pad field size */
1460 skip_bits(&s->gb, 32); /* next off */
1461 skip_bits(&s->gb, 32); /* quant off */
1462 skip_bits(&s->gb, 32); /* huff off */
1463 skip_bits(&s->gb, 32); /* image off */
1464 skip_bits(&s->gb, 32); /* scan off */
1465 skip_bits(&s->gb, 32); /* data off */
1467 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1468 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1473 /* slow but needed for extreme adobe jpegs */
1475 av_log(s->avctx, AV_LOG_ERROR,
1476 "mjpeg: error, decode_app parser read over the end\n");
1478 skip_bits(&s->gb, 8);
1483 static int mjpeg_decode_com(MJpegDecodeContext *s)
1485 int len = get_bits(&s->gb, 16);
1486 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1487 char *cbuf = av_malloc(len - 1);
1490 for (i = 0; i < len - 2; i++)
1491 cbuf[i] = get_bits(&s->gb, 8);
1492 if (i > 0 && cbuf[i - 1] == '\n')
1497 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1498 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1500 /* buggy avid, it puts EOI only at every 10th frame */
1501 if (!strcmp(cbuf, "AVID")) {
1503 } else if (!strcmp(cbuf, "CS=ITU601"))
1505 else if ((len > 31 && !strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32)) ||
1506 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1516 /* return the 8 bit start code value and update the search
1517 state. Return -1 if no start code found */
1518 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1520 const uint8_t *buf_ptr;
1525 buf_ptr = *pbuf_ptr;
1526 while (buf_ptr < buf_end) {
1529 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1537 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1538 *pbuf_ptr = buf_ptr;
1542 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1543 const uint8_t **buf_ptr, const uint8_t *buf_end,
1544 const uint8_t **unescaped_buf_ptr,
1545 int *unescaped_buf_size)
1548 start_code = find_marker(buf_ptr, buf_end);
1550 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1552 return AVERROR(ENOMEM);
1554 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1555 if (start_code == SOS && !s->ls) {
1556 const uint8_t *src = *buf_ptr;
1557 uint8_t *dst = s->buffer;
1559 while (src < buf_end) {
1560 uint8_t x = *(src++);
1563 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1565 while (src < buf_end && x == 0xff)
1568 if (x >= 0xd0 && x <= 0xd7)
1575 *unescaped_buf_ptr = s->buffer;
1576 *unescaped_buf_size = dst - s->buffer;
1577 memset(s->buffer + *unescaped_buf_size, 0,
1578 FF_INPUT_BUFFER_PADDING_SIZE);
1580 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1581 (buf_end - *buf_ptr) - (dst - s->buffer));
1582 } else if (start_code == SOS && s->ls) {
1583 const uint8_t *src = *buf_ptr;
1584 uint8_t *dst = s->buffer;
1592 while (src + t < buf_end) {
1593 uint8_t x = src[t++];
1595 while ((src + t < buf_end) && x == 0xff)
1604 init_put_bits(&pb, dst, t);
1606 /* unescape bitstream */
1608 uint8_t x = src[b++];
1609 put_bits(&pb, 8, x);
1612 put_bits(&pb, 7, x);
1616 flush_put_bits(&pb);
1618 *unescaped_buf_ptr = dst;
1619 *unescaped_buf_size = (bit_count + 7) >> 3;
1620 memset(s->buffer + *unescaped_buf_size, 0,
1621 FF_INPUT_BUFFER_PADDING_SIZE);
1623 *unescaped_buf_ptr = *buf_ptr;
1624 *unescaped_buf_size = buf_end - *buf_ptr;
1630 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1633 const uint8_t *buf = avpkt->data;
1634 int buf_size = avpkt->size;
1635 MJpegDecodeContext *s = avctx->priv_data;
1636 const uint8_t *buf_end, *buf_ptr;
1637 const uint8_t *unescaped_buf_ptr;
1638 int unescaped_buf_size;
1642 AVFrame *picture = data;
1645 buf_end = buf + buf_size;
1646 while (buf_ptr < buf_end) {
1647 /* find start next marker */
1648 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1650 &unescaped_buf_size);
1652 if (start_code < 0) {
1654 } else if (unescaped_buf_size > (1U<<28)) {
1655 av_log(avctx, AV_LOG_ERROR, "MJPEG packet 0x%x too big (0x%x/0x%x), corrupt data?\n",
1656 start_code, unescaped_buf_size, buf_size);
1657 return AVERROR_INVALIDDATA;
1659 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1660 start_code, buf_end - buf_ptr);
1662 init_get_bits(&s->gb, unescaped_buf_ptr, unescaped_buf_size * 8);
1664 s->start_code = start_code;
1665 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1666 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1668 /* process markers */
1669 if (start_code >= 0xd0 && start_code <= 0xd7)
1670 av_log(avctx, AV_LOG_DEBUG,
1671 "restart marker: %d\n", start_code & 0x0f);
1673 else if (start_code >= APP0 && start_code <= APP15)
1674 mjpeg_decode_app(s);
1676 else if (start_code == COM)
1677 mjpeg_decode_com(s);
1680 switch (start_code) {
1682 s->restart_interval = 0;
1683 s->restart_count = 0;
1684 /* nothing to do on SOI */
1687 ff_mjpeg_decode_dqt(s);
1690 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1691 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1700 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1707 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1714 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1721 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1725 if (!CONFIG_JPEGLS_DECODER ||
1726 (ret = ff_jpegls_decode_lse(s)) < 0)
1732 if (!s->got_picture) {
1733 av_log(avctx, AV_LOG_WARNING,
1734 "Found EOI before any SOF, ignoring\n");
1737 if (s->interlaced) {
1738 s->bottom_field ^= 1;
1739 /* if not bottom field, do not output image yet */
1740 if (s->bottom_field == !s->interlace_polarity)
1743 *picture = *s->picture_ptr;
1748 picture->quality = FFMAX3(s->qscale[0],
1751 picture->qstride = 0;
1752 picture->qscale_table = s->qscale_table;
1753 memset(picture->qscale_table, picture->quality,
1754 (s->width + 15) / 16);
1755 if (avctx->debug & FF_DEBUG_QP)
1756 av_log(avctx, AV_LOG_DEBUG,
1757 "QP: %d\n", picture->quality);
1758 picture->quality *= FF_QP2LAMBDA;
1763 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1764 (avctx->err_recognition & AV_EF_EXPLODE))
1768 mjpeg_decode_dri(s);
1780 av_log(avctx, AV_LOG_ERROR,
1781 "mjpeg: unsupported coding type (%x)\n", start_code);
1785 /* eof process start code */
1786 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1787 av_log(avctx, AV_LOG_DEBUG,
1788 "marker parser used %d bytes (%d bits)\n",
1789 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1792 if (s->got_picture) {
1793 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1796 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1797 return AVERROR_INVALIDDATA;
1803 uint8_t *line = s->picture_ptr->data[s->upscale_h];
1804 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
1805 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1806 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
1807 avctx->pix_fmt == AV_PIX_FMT_YUV440P);
1808 for (i = 0; i < s->chroma_height; i++) {
1809 for (index = s->width - 1; index; index--)
1810 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
1811 line += s->linesize[s->upscale_h];
1815 uint8_t *dst = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(s->height - 1) * s->linesize[s->upscale_v]];
1816 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
1817 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1818 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
1819 avctx->pix_fmt == AV_PIX_FMT_YUV422P);
1820 for (i = s->height - 1; i; i--) {
1821 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[i / 2 * s->linesize[s->upscale_v]];
1822 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(i + 1) / 2 * s->linesize[s->upscale_v]];
1824 memcpy(dst, src1, s->width);
1826 for (index = 0; index < s->width; index++)
1827 dst[index] = (src1[index] + src2[index]) >> 1;
1829 dst -= s->linesize[s->upscale_v];
1832 if (s->flipped && (s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
1833 int hshift, vshift, j;
1834 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
1835 for (index=0; index<4; index++) {
1836 uint8_t *dst = s->picture_ptr->data[index];
1839 if(index && index<3){
1840 w = -((-w) >> hshift);
1841 h = -((-h) >> vshift);
1844 uint8_t *dst2 = dst + s->linesize[index]*(h-1);
1845 for (i=0; i<h/2; i++) {
1847 FFSWAP(int, dst[j], dst2[j]);
1848 dst += s->linesize[index];
1849 dst2 -= s->linesize[index];
1855 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %td bytes\n",
1857 // return buf_end - buf_ptr;
1858 return buf_ptr - buf;
1861 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1863 MJpegDecodeContext *s = avctx->priv_data;
1866 if (s->picture_ptr && s->picture_ptr->data[0])
1867 avctx->release_buffer(avctx, s->picture_ptr);
1870 av_free(s->qscale_table);
1871 av_freep(&s->ljpeg_buffer);
1872 s->ljpeg_buffer_size = 0;
1874 for (i = 0; i < 3; i++) {
1875 for (j = 0; j < 4; j++)
1876 ff_free_vlc(&s->vlcs[i][j]);
1878 for (i = 0; i < MAX_COMPONENTS; i++) {
1879 av_freep(&s->blocks[i]);
1880 av_freep(&s->last_nnz[i]);
1885 static void decode_flush(AVCodecContext *avctx)
1887 MJpegDecodeContext *s = avctx->priv_data;
1891 #if CONFIG_MJPEG_DECODER
1892 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1893 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1894 static const AVOption options[] = {
1895 { "extern_huff", "Use external huffman table.",
1896 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
1900 static const AVClass mjpegdec_class = {
1901 .class_name = "MJPEG decoder",
1902 .item_name = av_default_item_name,
1904 .version = LIBAVUTIL_VERSION_INT,
1907 AVCodec ff_mjpeg_decoder = {
1909 .type = AVMEDIA_TYPE_VIDEO,
1910 .id = AV_CODEC_ID_MJPEG,
1911 .priv_data_size = sizeof(MJpegDecodeContext),
1912 .init = ff_mjpeg_decode_init,
1913 .close = ff_mjpeg_decode_end,
1914 .decode = ff_mjpeg_decode_frame,
1915 .flush = decode_flush,
1916 .capabilities = CODEC_CAP_DR1,
1918 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1919 .priv_class = &mjpegdec_class,
1922 #if CONFIG_THP_DECODER
1923 AVCodec ff_thp_decoder = {
1925 .type = AVMEDIA_TYPE_VIDEO,
1926 .id = AV_CODEC_ID_THP,
1927 .priv_data_size = sizeof(MJpegDecodeContext),
1928 .init = ff_mjpeg_decode_init,
1929 .close = ff_mjpeg_decode_end,
1930 .decode = ff_mjpeg_decode_frame,
1931 .flush = decode_flush,
1932 .capabilities = CODEC_CAP_DR1,
1934 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),