3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2003 Alex Beregszaszi
5 * Copyright (c) 2003-2004 Michael Niedermayer
7 * Support for external huffman table, various fixes (AVID workaround),
8 * aspecting, new decode_frame mechanism and apple mjpeg-b support
11 * This file is part of FFmpeg.
13 * FFmpeg is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU Lesser General Public
15 * License as published by the Free Software Foundation; either
16 * version 2.1 of the License, or (at your option) any later version.
18 * FFmpeg is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * Lesser General Public License for more details.
23 * You should have received a copy of the GNU Lesser General Public
24 * License along with FFmpeg; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
33 #include "libavutil/imgutils.h"
34 #include "libavutil/avassert.h"
35 #include "libavutil/opt.h"
37 #include "copy_block.h"
41 #include "jpeglsdec.h"
44 #include "bytestream.h"
47 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
48 const uint8_t *val_table, int nb_codes,
49 int use_static, int is_ac)
51 uint8_t huff_size[256] = { 0 };
52 uint16_t huff_code[256];
53 uint16_t huff_sym[256];
56 av_assert0(nb_codes <= 256);
58 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
60 for (i = 0; i < 256; i++)
61 huff_sym[i] = i + 16 * is_ac;
64 huff_sym[0] = 16 * 256;
66 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
67 huff_code, 2, 2, huff_sym, 2, 2, use_static);
70 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
72 build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
73 avpriv_mjpeg_val_dc, 12, 0, 0);
74 build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
75 avpriv_mjpeg_val_dc, 12, 0, 0);
76 build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
77 avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
78 build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
79 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
80 build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
81 avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
82 build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
83 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
86 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
88 MJpegDecodeContext *s = avctx->priv_data;
91 s->picture_ptr = &s->picture;
92 avcodec_get_frame_defaults(&s->picture);
95 ff_hpeldsp_init(&s->hdsp, avctx->flags);
96 ff_dsputil_init(&s->dsp, avctx);
97 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
101 s->first_picture = 1;
103 s->org_height = avctx->coded_height;
104 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
106 build_basic_mjpeg_vlc(s);
108 if (s->extern_huff) {
109 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
110 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
111 if (ff_mjpeg_decode_dht(s)) {
112 av_log(avctx, AV_LOG_ERROR,
113 "error using external huffman table, switching back to internal\n");
114 build_basic_mjpeg_vlc(s);
117 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
118 s->interlace_polarity = 1; /* bottom field first */
119 av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
121 if (avctx->codec->id == AV_CODEC_ID_AMV)
128 /* quantize tables */
129 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
131 int len, index, i, j;
133 len = get_bits(&s->gb, 16) - 2;
136 int pr = get_bits(&s->gb, 4);
138 av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
139 return AVERROR_INVALIDDATA;
141 index = get_bits(&s->gb, 4);
144 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
145 /* read quant table */
146 for (i = 0; i < 64; i++) {
147 j = s->scantable.permutated[i];
148 s->quant_matrixes[index][j] = get_bits(&s->gb, pr ? 16 : 8);
151 // XXX FIXME finetune, and perhaps add dc too
152 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
153 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
154 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
155 index, s->qscale[index]);
161 /* decode huffman tables and build VLC decoders */
162 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
164 int len, index, i, class, n, v, code_max;
165 uint8_t bits_table[17];
166 uint8_t val_table[256];
169 len = get_bits(&s->gb, 16) - 2;
173 return AVERROR_INVALIDDATA;
174 class = get_bits(&s->gb, 4);
176 return AVERROR_INVALIDDATA;
177 index = get_bits(&s->gb, 4);
179 return AVERROR_INVALIDDATA;
181 for (i = 1; i <= 16; i++) {
182 bits_table[i] = get_bits(&s->gb, 8);
186 if (len < n || n > 256)
187 return AVERROR_INVALIDDATA;
190 for (i = 0; i < n; i++) {
191 v = get_bits(&s->gb, 8);
198 /* build VLC and flush previous vlc if present */
199 ff_free_vlc(&s->vlcs[class][index]);
200 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
201 class, index, code_max + 1);
202 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
203 code_max + 1, 0, class > 0)) < 0)
207 ff_free_vlc(&s->vlcs[2][index]);
208 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
209 code_max + 1, 0, 0)) < 0)
216 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
218 int len, nb_components, i, width, height, pix_fmt_id;
219 int h_count[MAX_COMPONENTS];
220 int v_count[MAX_COMPONENTS];
223 s->upscale_h = s->upscale_v = 0;
225 /* XXX: verify len field validity */
226 len = get_bits(&s->gb, 16);
227 s->avctx->bits_per_raw_sample =
228 s->bits = get_bits(&s->gb, 8);
232 if (s->bits == 9 && !s->pegasus_rct)
233 s->rct = 1; // FIXME ugly
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,
258 "nb_components changing in interlaced picture\n");
259 return AVERROR_INVALIDDATA;
262 if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
263 avpriv_report_missing_feature(s->avctx,
264 "JPEG-LS that is not <= 8 "
265 "bits/component or 16-bit gray");
266 return AVERROR_PATCHWELCOME;
268 s->nb_components = nb_components;
271 memset(h_count, 0, sizeof(h_count));
272 memset(v_count, 0, sizeof(v_count));
273 for (i = 0; i < nb_components; i++) {
275 s->component_id[i] = get_bits(&s->gb, 8) - 1;
276 h_count[i] = get_bits(&s->gb, 4);
277 v_count[i] = get_bits(&s->gb, 4);
278 /* compute hmax and vmax (only used in interleaved case) */
279 if (h_count[i] > s->h_max)
280 s->h_max = h_count[i];
281 if (v_count[i] > s->v_max)
282 s->v_max = v_count[i];
283 s->quant_index[i] = get_bits(&s->gb, 8);
284 if (s->quant_index[i] >= 4) {
285 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
286 return AVERROR_INVALIDDATA;
288 if (!h_count[i] || !v_count[i]) {
289 av_log(s->avctx, AV_LOG_ERROR,
290 "Invalid sampling factor in component %d %d:%d\n",
291 i, h_count[i], v_count[i]);
292 return AVERROR_INVALIDDATA;
295 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
296 i, h_count[i], v_count[i],
297 s->component_id[i], s->quant_index[i]);
300 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
301 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
302 return AVERROR_PATCHWELCOME;
306 /* if different size, realloc/alloc picture */
307 if ( width != s->width || height != s->height
308 || memcmp(s->h_count, h_count, sizeof(h_count))
309 || memcmp(s->v_count, v_count, sizeof(v_count))) {
313 memcpy(s->h_count, h_count, sizeof(h_count));
314 memcpy(s->v_count, v_count, sizeof(v_count));
318 /* test interlaced mode */
319 if (s->first_picture &&
320 s->org_height != 0 &&
321 s->height < ((s->org_height * 3) / 4)) {
323 s->bottom_field = s->interlace_polarity;
324 s->picture_ptr->interlaced_frame = 1;
325 s->picture_ptr->top_field_first = !s->interlace_polarity;
329 avcodec_set_dimensions(s->avctx, width, height);
331 s->first_picture = 0;
334 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
335 if (s->progressive) {
336 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
337 return AVERROR_INVALIDDATA;
340 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
342 else if (!s->lossless)
344 /* XXX: not complete test ! */
345 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
346 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
347 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
348 (s->h_count[3] << 4) | s->v_count[3];
349 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
350 /* NOTE we do not allocate pictures large enough for the possible
351 * padding of h/v_count being 4 */
352 if (!(pix_fmt_id & 0xD0D0D0D0))
353 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
354 if (!(pix_fmt_id & 0x0D0D0D0D))
355 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
357 switch (pix_fmt_id) {
360 s->avctx->pix_fmt = AV_PIX_FMT_BGR24;
362 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
363 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
365 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
366 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
367 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
370 av_assert0(s->nb_components == 3);
374 s->avctx->pix_fmt = AV_PIX_FMT_ABGR;
376 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
377 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
379 av_assert0(s->nb_components == 4);
383 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
386 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
388 s->upscale_h = (pix_fmt_id == 0x22122100);
389 s->chroma_height = s->height;
393 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
396 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
397 s->upscale_v = (pix_fmt_id == 0x22211200);
399 s->chroma_height = s->height;
402 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
405 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
408 s->chroma_height = s->height / 2;
420 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
422 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
427 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
430 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
431 s->upscale_h = (pix_fmt_id == 0x22211100) * 2 + (pix_fmt_id == 0x22112100);
432 s->chroma_height = s->height / 2;
435 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
436 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
437 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
441 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
444 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
445 s->upscale_v = (pix_fmt_id == 0x22121100) + 1;
448 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
449 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
450 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
453 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
456 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
460 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
461 return AVERROR_PATCHWELCOME;
463 if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
464 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
465 return AVERROR_PATCHWELCOME;
468 s->upscale_h = s->upscale_v = 0;
469 if (s->nb_components > 1)
470 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
471 else if (s->bits <= 8)
472 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
474 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
477 av_frame_unref(s->picture_ptr);
478 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
480 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
481 s->picture_ptr->key_frame = 1;
484 for (i = 0; i < 3; i++)
485 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
487 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
488 s->width, s->height, s->linesize[0], s->linesize[1],
489 s->interlaced, s->avctx->height);
491 if (len != (8 + (3 * nb_components)))
492 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
495 if (s->rgb && !s->lossless && !s->ls) {
496 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
497 return AVERROR_PATCHWELCOME;
500 /* totally blank picture as progressive JPEG will only add details to it */
501 if (s->progressive) {
502 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
503 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
504 for (i = 0; i < s->nb_components; i++) {
505 int size = bw * bh * s->h_count[i] * s->v_count[i];
506 av_freep(&s->blocks[i]);
507 av_freep(&s->last_nnz[i]);
508 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
509 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
510 s->block_stride[i] = bw * s->h_count[i];
512 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
517 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
520 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
521 if (code < 0 || code > 16) {
522 av_log(s->avctx, AV_LOG_WARNING,
523 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
524 0, dc_index, &s->vlcs[0][dc_index]);
529 return get_xbits(&s->gb, code);
534 /* decode block and dequantize */
535 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
536 int dc_index, int ac_index, int16_t *quant_matrix)
538 int code, i, j, level, val;
541 val = mjpeg_decode_dc(s, dc_index);
543 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
544 return AVERROR_INVALIDDATA;
546 val = val * quant_matrix[0] + s->last_dc[component];
547 s->last_dc[component] = val;
551 {OPEN_READER(re, &s->gb);
553 UPDATE_CACHE(re, &s->gb);
554 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
556 i += ((unsigned)code) >> 4;
559 if (code > MIN_CACHE_BITS - 16)
560 UPDATE_CACHE(re, &s->gb);
563 int cache = GET_CACHE(re, &s->gb);
564 int sign = (~cache) >> 31;
565 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
568 LAST_SKIP_BITS(re, &s->gb, code);
571 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
572 return AVERROR_INVALIDDATA;
574 j = s->scantable.permutated[i];
575 block[j] = level * quant_matrix[j];
578 CLOSE_READER(re, &s->gb);}
583 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
584 int component, int dc_index,
585 int16_t *quant_matrix, int Al)
588 s->dsp.clear_block(block);
589 val = mjpeg_decode_dc(s, dc_index);
591 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
592 return AVERROR_INVALIDDATA;
594 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
595 s->last_dc[component] = val;
600 /* decode block and dequantize - progressive JPEG version */
601 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
602 uint8_t *last_nnz, int ac_index,
603 int16_t *quant_matrix,
604 int ss, int se, int Al, int *EOBRUN)
606 int code, i, j, level, val, run;
614 OPEN_READER(re, &s->gb);
615 for (i = ss; ; i++) {
616 UPDATE_CACHE(re, &s->gb);
617 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
619 run = ((unsigned) code) >> 4;
623 if (code > MIN_CACHE_BITS - 16)
624 UPDATE_CACHE(re, &s->gb);
627 int cache = GET_CACHE(re, &s->gb);
628 int sign = (~cache) >> 31;
629 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
632 LAST_SKIP_BITS(re, &s->gb, code);
636 j = s->scantable.permutated[se];
637 block[j] = level * quant_matrix[j] << Al;
640 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
641 return AVERROR_INVALIDDATA;
643 j = s->scantable.permutated[i];
644 block[j] = level * quant_matrix[j] << Al;
646 if (run == 0xF) {// ZRL - skip 15 coefficients
649 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
650 return AVERROR_INVALIDDATA;
655 UPDATE_CACHE(re, &s->gb);
656 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
657 LAST_SKIP_BITS(re, &s->gb, run);
664 CLOSE_READER(re, &s->gb);
673 #define REFINE_BIT(j) { \
674 UPDATE_CACHE(re, &s->gb); \
675 sign = block[j] >> 15; \
676 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
677 ((quant_matrix[j] ^ sign) - sign) << Al; \
678 LAST_SKIP_BITS(re, &s->gb, 1); \
686 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
691 j = s->scantable.permutated[i]; \
694 else if (run-- == 0) \
698 /* decode block and dequantize - progressive JPEG refinement pass */
699 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
701 int ac_index, int16_t *quant_matrix,
702 int ss, int se, int Al, int *EOBRUN)
704 int code, i = ss, j, sign, val, run;
705 int last = FFMIN(se, *last_nnz);
707 OPEN_READER(re, &s->gb);
712 UPDATE_CACHE(re, &s->gb);
713 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
716 run = ((unsigned) code) >> 4;
717 UPDATE_CACHE(re, &s->gb);
718 val = SHOW_UBITS(re, &s->gb, 1);
719 LAST_SKIP_BITS(re, &s->gb, 1);
721 j = s->scantable.permutated[i];
723 block[j] = ((quant_matrix[j]^val) - val) << Al;
727 CLOSE_READER(re, &s->gb);
731 run = ((unsigned) code) >> 4;
738 UPDATE_CACHE(re, &s->gb);
739 run += SHOW_UBITS(re, &s->gb, val);
740 LAST_SKIP_BITS(re, &s->gb, val);
752 for (; i <= last; i++) {
753 j = s->scantable.permutated[i];
757 CLOSE_READER(re, &s->gb);
764 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
769 if (s->restart_interval) {
771 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
772 align_get_bits(&s->gb);
773 for (i = 0; i < nb_components; i++) /* reset dc */
774 s->last_dc[i] = (4 << s->bits);
777 i = 8 + ((-get_bits_count(&s->gb)) & 7);
779 if (s->restart_count == 0) {
780 if( show_bits(&s->gb, i) == (1 << i) - 1
781 || show_bits(&s->gb, i) == 0xFF) {
782 int pos = get_bits_count(&s->gb);
783 align_get_bits(&s->gb);
784 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
785 skip_bits(&s->gb, 8);
786 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
787 for (i = 0; i < nb_components; i++) /* reset dc */
788 s->last_dc[i] = (4 << s->bits);
791 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
798 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
801 uint16_t (*buffer)[4];
802 int left[4], top[4], topleft[4];
803 const int linesize = s->linesize[0];
804 const int mask = ((1 << s->bits) - 1) << point_transform;
808 if (s->nb_components != 3 && s->nb_components != 4)
809 return AVERROR_INVALIDDATA;
810 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
811 return AVERROR_INVALIDDATA;
814 s->restart_count = s->restart_interval;
816 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
817 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
818 buffer = s->ljpeg_buffer;
820 for (i = 0; i < 4; i++)
821 buffer[0][i] = 1 << (s->bits - 1);
823 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
824 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
826 if (s->interlaced && s->bottom_field)
827 ptr += linesize >> 1;
829 for (i = 0; i < 4; i++)
830 top[i] = left[i] = topleft[i] = buffer[0][i];
832 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
833 int modified_predictor = predictor;
835 if (s->restart_interval && !s->restart_count){
836 s->restart_count = s->restart_interval;
840 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
842 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
843 modified_predictor = 1;
845 for (i=0;i<nb_components;i++) {
849 top[i] = buffer[mb_x][i];
851 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
853 dc = mjpeg_decode_dc(s, s->dc_index[i]);
857 left[i] = buffer[mb_x][i] =
858 mask & (pred + (dc << point_transform));
861 if (s->restart_interval && !--s->restart_count) {
862 align_get_bits(&s->gb);
863 skip_bits(&s->gb, 16); /* skip RSTn */
866 if (s->nb_components == 4) {
867 for(i=0; i<nb_components; i++) {
868 int c= s->comp_index[i];
869 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
870 ptr[4*mb_x+3-c] = buffer[mb_x][i];
874 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
875 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
876 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
877 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
879 } else if (s->pegasus_rct) {
880 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
881 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
882 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
883 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
886 for(i=0; i<nb_components; i++) {
887 int c= s->comp_index[i];
888 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
889 ptr[3*mb_x+2-c] = buffer[mb_x][i];
897 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
898 int point_transform, int nb_components)
900 int i, mb_x, mb_y, mask;
901 int bits= (s->bits+7)&~7;
905 point_transform += bits - s->bits;
906 mask = ((1 << s->bits) - 1) << point_transform;
908 av_assert0(nb_components>=1 && nb_components<=4);
910 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
911 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
912 if (s->restart_interval && !s->restart_count){
913 s->restart_count = s->restart_interval;
918 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
919 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
920 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
921 for (i = 0; i < nb_components; i++) {
924 int n, h, v, x, y, c, j, linesize;
926 c = s->comp_index[i];
931 linesize= s->linesize[c];
933 if(bits>8) linesize /= 2;
938 dc = mjpeg_decode_dc(s, s->dc_index[i]);
942 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
945 pred= 1 << (bits - 1);
951 pred= ptr[-linesize];
953 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
957 if (s->interlaced && s->bottom_field)
958 ptr += linesize >> 1;
960 *ptr= pred + (dc << point_transform);
962 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
965 pred= 1 << (bits - 1);
971 pred= ptr16[-linesize];
973 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
977 if (s->interlaced && s->bottom_field)
978 ptr16 += linesize >> 1;
980 *ptr16= pred + (dc << point_transform);
989 for (i = 0; i < nb_components; i++) {
992 int n, h, v, x, y, c, j, linesize, dc;
994 c = s->comp_index[i];
999 linesize = s->linesize[c];
1001 if(bits>8) linesize /= 2;
1003 for (j = 0; j < n; j++) {
1006 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1010 ptr = s->picture.data[c] +
1011 (linesize * (v * mb_y + y)) +
1012 (h * mb_x + x); //FIXME optimize this crap
1013 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1016 *ptr = pred + (dc << point_transform);
1018 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1019 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1022 *ptr16= pred + (dc << point_transform);
1032 if (s->restart_interval && !--s->restart_count) {
1033 align_get_bits(&s->gb);
1034 skip_bits(&s->gb, 16); /* skip RSTn */
1041 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1042 uint8_t *dst, const uint8_t *src,
1043 int linesize, int lowres)
1046 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1048 case 1: copy_block4(dst, src, linesize, linesize, 4);
1050 case 2: copy_block2(dst, src, linesize, linesize, 2);
1052 case 3: *dst = *src;
1057 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1059 int block_x, block_y;
1060 int size = 8 >> s->avctx->lowres;
1062 for (block_y=0; block_y<size; block_y++)
1063 for (block_x=0; block_x<size; block_x++)
1064 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1066 for (block_y=0; block_y<size; block_y++)
1067 for (block_x=0; block_x<size; block_x++)
1068 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1072 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1073 int Al, const uint8_t *mb_bitmask,
1074 const AVFrame *reference)
1077 uint8_t *data[MAX_COMPONENTS];
1078 const uint8_t *reference_data[MAX_COMPONENTS];
1079 int linesize[MAX_COMPONENTS];
1080 GetBitContext mb_bitmask_gb;
1081 int bytes_per_pixel = 1 + (s->bits > 8);
1084 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1086 if (s->flipped && s->avctx->lowres) {
1087 av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with lowres\n");
1090 s->restart_count = 0;
1091 for (i = 0; i < nb_components; i++) {
1092 int c = s->comp_index[i];
1093 data[c] = s->picture_ptr->data[c];
1094 reference_data[c] = reference ? reference->data[c] : NULL;
1095 linesize[c] = s->linesize[c];
1096 s->coefs_finished[c] |= 1;
1097 if (s->flipped && !(s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
1098 // picture should be flipped upside-down for this codec
1099 int offset = (linesize[c] * (s->v_scount[i] *
1100 (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
1102 reference_data[c] += offset;
1107 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1108 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1109 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1111 if (s->restart_interval && !s->restart_count)
1112 s->restart_count = s->restart_interval;
1114 if (get_bits_left(&s->gb) < 0) {
1115 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1116 -get_bits_left(&s->gb));
1117 return AVERROR_INVALIDDATA;
1119 for (i = 0; i < nb_components; i++) {
1121 int n, h, v, x, y, c, j;
1123 n = s->nb_blocks[i];
1124 c = s->comp_index[i];
1129 for (j = 0; j < n; j++) {
1130 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1131 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1133 if (s->interlaced && s->bottom_field)
1134 block_offset += linesize[c] >> 1;
1135 ptr = data[c] + block_offset;
1136 if (!s->progressive) {
1138 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1139 linesize[c], s->avctx->lowres);
1142 s->dsp.clear_block(s->block);
1143 if (decode_block(s, s->block, i,
1144 s->dc_index[i], s->ac_index[i],
1145 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1146 av_log(s->avctx, AV_LOG_ERROR,
1147 "error y=%d x=%d\n", mb_y, mb_x);
1148 return AVERROR_INVALIDDATA;
1150 s->dsp.idct_put(ptr, linesize[c], s->block);
1152 shift_output(s, ptr, linesize[c]);
1155 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1157 int16_t *block = s->blocks[c][block_idx];
1159 block[0] += get_bits1(&s->gb) *
1160 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1161 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1162 s->quant_matrixes[s->quant_sindex[i]],
1164 av_log(s->avctx, AV_LOG_ERROR,
1165 "error y=%d x=%d\n", mb_y, mb_x);
1166 return AVERROR_INVALIDDATA;
1169 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1170 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1171 mb_x, mb_y, x, y, c, s->bottom_field,
1172 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1180 handle_rstn(s, nb_components);
1186 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1187 int se, int Ah, int Al)
1191 int c = s->comp_index[0];
1192 uint8_t *data = s->picture.data[c];
1193 int linesize = s->linesize[c];
1195 int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1196 int bytes_per_pixel = 1 + (s->bits > 8);
1198 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1199 if (se < ss || se > 63) {
1200 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1201 return AVERROR_INVALIDDATA;
1205 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
1206 last_scan = !~s->coefs_finished[c];
1209 if (s->interlaced && s->bottom_field)
1210 data += linesize >> 1;
1212 s->restart_count = 0;
1214 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1215 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1216 int block_idx = mb_y * s->block_stride[c];
1217 int16_t (*block)[64] = &s->blocks[c][block_idx];
1218 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1219 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1221 if (s->restart_interval && !s->restart_count)
1222 s->restart_count = s->restart_interval;
1225 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1226 quant_matrix, ss, se, Al, &EOBRUN);
1228 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1229 quant_matrix, ss, se, Al, &EOBRUN);
1231 av_log(s->avctx, AV_LOG_ERROR,
1232 "error y=%d x=%d\n", mb_y, mb_x);
1233 return AVERROR_INVALIDDATA;
1237 s->dsp.idct_put(ptr, linesize, *block);
1239 shift_output(s, ptr, linesize);
1240 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1242 if (handle_rstn(s, 0))
1249 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1250 const AVFrame *reference)
1252 int len, nb_components, i, h, v, predictor, point_transform;
1254 const int block_size = s->lossless ? 1 : 8;
1255 int ilv, prev_shift;
1257 if (!s->got_picture) {
1258 av_log(s->avctx, AV_LOG_WARNING,
1259 "Can not process SOS before SOF, skipping\n");
1263 av_assert0(s->picture_ptr->data[0]);
1264 /* XXX: verify len field validity */
1265 len = get_bits(&s->gb, 16);
1266 nb_components = get_bits(&s->gb, 8);
1267 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1268 av_log(s->avctx, AV_LOG_ERROR,
1269 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1270 return AVERROR_PATCHWELCOME;
1272 if (len != 6 + 2 * nb_components) {
1273 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1274 return AVERROR_INVALIDDATA;
1276 for (i = 0; i < nb_components; i++) {
1277 id = get_bits(&s->gb, 8) - 1;
1278 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1279 /* find component index */
1280 for (index = 0; index < s->nb_components; index++)
1281 if (id == s->component_id[index])
1283 if (index == s->nb_components) {
1284 av_log(s->avctx, AV_LOG_ERROR,
1285 "decode_sos: index(%d) out of components\n", index);
1286 return AVERROR_INVALIDDATA;
1288 /* Metasoft MJPEG codec has Cb and Cr swapped */
1289 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1290 && nb_components == 3 && s->nb_components == 3 && i)
1293 s->quant_sindex[i] = s->quant_index[index];
1294 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1295 s->h_scount[i] = s->h_count[index];
1296 s->v_scount[i] = s->v_count[index];
1298 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1300 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1301 index = (index+2)%3;
1303 s->comp_index[i] = index;
1305 s->dc_index[i] = get_bits(&s->gb, 4);
1306 s->ac_index[i] = get_bits(&s->gb, 4);
1308 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1309 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1311 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))
1315 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1316 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1317 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1318 prev_shift = get_bits(&s->gb, 4); /* Ah */
1319 point_transform = get_bits(&s->gb, 4); /* Al */
1321 prev_shift = point_transform = 0;
1323 if (nb_components > 1) {
1324 /* interleaved stream */
1325 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1326 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1327 } else if (!s->ls) { /* skip this for JPEG-LS */
1328 h = s->h_max / s->h_scount[0];
1329 v = s->v_max / s->v_scount[0];
1330 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1331 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1332 s->nb_blocks[0] = 1;
1337 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1338 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1339 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1340 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1341 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1344 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1345 for (i = s->mjpb_skiptosod; i > 0; i--)
1346 skip_bits(&s->gb, 8);
1349 for (i = 0; i < nb_components; i++)
1350 s->last_dc[i] = (4 << s->bits);
1353 av_assert0(s->picture_ptr == &s->picture);
1354 if (CONFIG_JPEGLS_DECODER && s->ls) {
1356 // reset_ls_coding_parameters(s, 0);
1358 if ((ret = ff_jpegls_decode_picture(s, predictor,
1359 point_transform, ilv)) < 0)
1363 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1366 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1368 nb_components)) < 0)
1373 if (s->progressive && predictor) {
1374 av_assert0(s->picture_ptr == &s->picture);
1375 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1377 point_transform)) < 0)
1380 if ((ret = mjpeg_decode_scan(s, nb_components,
1381 prev_shift, point_transform,
1382 mb_bitmask, reference)) < 0)
1387 if (s->interlaced &&
1388 get_bits_left(&s->gb) > 32 &&
1389 show_bits(&s->gb, 8) == 0xFF) {
1390 GetBitContext bak = s->gb;
1391 align_get_bits(&bak);
1392 if (show_bits(&bak, 16) == 0xFFD1) {
1393 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1395 skip_bits(&s->gb, 16);
1396 s->bottom_field ^= 1;
1405 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1406 return AVERROR_INVALIDDATA;
1409 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1411 if (get_bits(&s->gb, 16) != 4)
1412 return AVERROR_INVALIDDATA;
1413 s->restart_interval = get_bits(&s->gb, 16);
1414 s->restart_count = 0;
1415 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1416 s->restart_interval);
1421 static int mjpeg_decode_app(MJpegDecodeContext *s)
1425 len = get_bits(&s->gb, 16);
1427 return AVERROR_INVALIDDATA;
1428 if (8 * len > get_bits_left(&s->gb))
1429 return AVERROR_INVALIDDATA;
1431 id = get_bits_long(&s->gb, 32);
1434 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1435 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X len=%d\n", id, len);
1437 /* Buggy AVID, it puts EOI only at every 10th frame. */
1438 /* Also, this fourcc is used by non-avid files too, it holds some
1439 information, but it's always present in AVID-created files. */
1440 if (id == AV_RB32("AVI1")) {
1446 4bytes field_size_less_padding
1449 i = get_bits(&s->gb, 8); len--;
1450 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1452 skip_bits(&s->gb, 8);
1453 skip_bits(&s->gb, 32);
1454 skip_bits(&s->gb, 32);
1462 if (id == AV_RB32("JFIF")) {
1463 int t_w, t_h, v1, v2;
1464 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1465 v1 = get_bits(&s->gb, 8);
1466 v2 = get_bits(&s->gb, 8);
1467 skip_bits(&s->gb, 8);
1469 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1470 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1472 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1473 av_log(s->avctx, AV_LOG_INFO,
1474 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1476 s->avctx->sample_aspect_ratio.num,
1477 s->avctx->sample_aspect_ratio.den);
1479 t_w = get_bits(&s->gb, 8);
1480 t_h = get_bits(&s->gb, 8);
1482 /* skip thumbnail */
1483 if (len -10 - (t_w * t_h * 3) > 0)
1484 len -= t_w * t_h * 3;
1490 if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1491 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1492 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1493 skip_bits(&s->gb, 16); /* version */
1494 skip_bits(&s->gb, 16); /* flags0 */
1495 skip_bits(&s->gb, 16); /* flags1 */
1496 skip_bits(&s->gb, 8); /* transform */
1501 if (id == AV_RB32("LJIF")) {
1502 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1503 av_log(s->avctx, AV_LOG_INFO,
1504 "Pegasus lossless jpeg header found\n");
1505 skip_bits(&s->gb, 16); /* version ? */
1506 skip_bits(&s->gb, 16); /* unknown always 0? */
1507 skip_bits(&s->gb, 16); /* unknown always 0? */
1508 skip_bits(&s->gb, 16); /* unknown always 0? */
1509 switch (i=get_bits(&s->gb, 8)) {
1519 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1524 if (id == AV_RL32("colr") && len > 0) {
1525 s->colr = get_bits(&s->gb, 8);
1526 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1527 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1531 if (id == AV_RL32("xfrm") && len > 0) {
1532 s->xfrm = get_bits(&s->gb, 8);
1533 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1534 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1540 if (s->start_code == APP1 && id == AV_RB32("Exif")) {
1541 GetByteContext gbytes;
1542 int ret, le, ifd_offset, bytes_read;
1543 const uint8_t *aligned;
1545 skip_bits(&s->gb, 16); // skip padding
1548 // init byte wise reading
1549 aligned = align_get_bits(&s->gb);
1550 bytestream2_init(&gbytes, aligned, len);
1553 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1555 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1559 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1561 // read 0th IFD and store the metadata
1562 // (return values > 0 indicate the presence of subimage metadata)
1563 ret = ff_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1565 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1569 bytes_read = bytestream2_tell(&gbytes);
1570 skip_bits(&s->gb, bytes_read << 3);
1577 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1578 id = get_bits_long(&s->gb, 32);
1581 if (id == AV_RB32("mjpg")) {
1583 skip_bits(&s->gb, 32); /* field size */
1584 skip_bits(&s->gb, 32); /* pad field size */
1585 skip_bits(&s->gb, 32); /* next off */
1586 skip_bits(&s->gb, 32); /* quant off */
1587 skip_bits(&s->gb, 32); /* huff off */
1588 skip_bits(&s->gb, 32); /* image off */
1589 skip_bits(&s->gb, 32); /* scan off */
1590 skip_bits(&s->gb, 32); /* data off */
1592 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1593 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1598 /* slow but needed for extreme adobe jpegs */
1600 av_log(s->avctx, AV_LOG_ERROR,
1601 "mjpeg: error, decode_app parser read over the end\n");
1603 skip_bits(&s->gb, 8);
1608 static int mjpeg_decode_com(MJpegDecodeContext *s)
1610 int len = get_bits(&s->gb, 16);
1611 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1612 char *cbuf = av_malloc(len - 1);
1615 for (i = 0; i < len - 2; i++)
1616 cbuf[i] = get_bits(&s->gb, 8);
1617 if (i > 0 && cbuf[i - 1] == '\n')
1622 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1623 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1625 /* buggy avid, it puts EOI only at every 10th frame */
1626 if (!strncmp(cbuf, "AVID", 4)) {
1628 if (len > 14 && cbuf[12] == 1) /* 1 - NTSC, 2 - PAL */
1629 s->interlace_polarity = 1;
1630 } else if (!strcmp(cbuf, "CS=ITU601"))
1632 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32)) ||
1633 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1643 /* return the 8 bit start code value and update the search
1644 state. Return -1 if no start code found */
1645 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1647 const uint8_t *buf_ptr;
1652 buf_ptr = *pbuf_ptr;
1653 while (buf_end - buf_ptr > 1) {
1656 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1665 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1666 *pbuf_ptr = buf_ptr;
1670 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1671 const uint8_t **buf_ptr, const uint8_t *buf_end,
1672 const uint8_t **unescaped_buf_ptr,
1673 int *unescaped_buf_size)
1676 start_code = find_marker(buf_ptr, buf_end);
1678 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1680 return AVERROR(ENOMEM);
1682 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1683 if (start_code == SOS && !s->ls) {
1684 const uint8_t *src = *buf_ptr;
1685 uint8_t *dst = s->buffer;
1687 while (src < buf_end) {
1688 uint8_t x = *(src++);
1691 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1693 while (src < buf_end && x == 0xff)
1696 if (x >= 0xd0 && x <= 0xd7)
1703 *unescaped_buf_ptr = s->buffer;
1704 *unescaped_buf_size = dst - s->buffer;
1705 memset(s->buffer + *unescaped_buf_size, 0,
1706 FF_INPUT_BUFFER_PADDING_SIZE);
1708 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1709 (buf_end - *buf_ptr) - (dst - s->buffer));
1710 } else if (start_code == SOS && s->ls) {
1711 const uint8_t *src = *buf_ptr;
1712 uint8_t *dst = s->buffer;
1720 while (src + t < buf_end) {
1721 uint8_t x = src[t++];
1723 while ((src + t < buf_end) && x == 0xff)
1732 init_put_bits(&pb, dst, t);
1734 /* unescape bitstream */
1736 uint8_t x = src[b++];
1737 put_bits(&pb, 8, x);
1740 put_bits(&pb, 7, x);
1744 flush_put_bits(&pb);
1746 *unescaped_buf_ptr = dst;
1747 *unescaped_buf_size = (bit_count + 7) >> 3;
1748 memset(s->buffer + *unescaped_buf_size, 0,
1749 FF_INPUT_BUFFER_PADDING_SIZE);
1751 *unescaped_buf_ptr = *buf_ptr;
1752 *unescaped_buf_size = buf_end - *buf_ptr;
1758 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1761 const uint8_t *buf = avpkt->data;
1762 int buf_size = avpkt->size;
1763 MJpegDecodeContext *s = avctx->priv_data;
1764 const uint8_t *buf_end, *buf_ptr;
1765 const uint8_t *unescaped_buf_ptr;
1767 int unescaped_buf_size;
1772 av_dict_free(&s->exif_metadata);
1775 buf_end = buf + buf_size;
1776 while (buf_ptr < buf_end) {
1777 /* find start next marker */
1778 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1780 &unescaped_buf_size);
1782 if (start_code < 0) {
1784 } else if (unescaped_buf_size > INT_MAX / 8) {
1785 av_log(avctx, AV_LOG_ERROR,
1786 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1787 start_code, unescaped_buf_size, buf_size);
1788 return AVERROR_INVALIDDATA;
1790 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1791 start_code, buf_end - buf_ptr);
1793 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
1796 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
1800 s->start_code = start_code;
1801 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1802 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1804 /* process markers */
1805 if (start_code >= 0xd0 && start_code <= 0xd7)
1806 av_log(avctx, AV_LOG_DEBUG,
1807 "restart marker: %d\n", start_code & 0x0f);
1809 else if (start_code >= APP0 && start_code <= APP15)
1810 mjpeg_decode_app(s);
1812 else if (start_code == COM)
1813 mjpeg_decode_com(s);
1817 if (!CONFIG_JPEGLS_DECODER &&
1818 (start_code == SOF48 || start_code == LSE)) {
1819 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
1820 return AVERROR(ENOSYS);
1823 switch (start_code) {
1825 s->restart_interval = 0;
1826 s->restart_count = 0;
1827 /* nothing to do on SOI */
1830 ff_mjpeg_decode_dqt(s);
1833 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1834 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1843 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1850 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1857 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1864 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1868 if (!CONFIG_JPEGLS_DECODER ||
1869 (ret = ff_jpegls_decode_lse(s)) < 0)
1875 if (!s->got_picture) {
1876 av_log(avctx, AV_LOG_WARNING,
1877 "Found EOI before any SOF, ignoring\n");
1880 if (s->interlaced) {
1881 s->bottom_field ^= 1;
1882 /* if not bottom field, do not output image yet */
1883 if (s->bottom_field == !s->interlace_polarity)
1886 if ((ret = av_frame_ref(data, s->picture_ptr)) < 0)
1892 int qp = FFMAX3(s->qscale[0],
1895 int qpw = (s->width + 15) / 16;
1896 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
1898 memset(qp_table_buf->data, qp, qpw);
1899 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
1902 if(avctx->debug & FF_DEBUG_QP)
1903 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
1908 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1909 (avctx->err_recognition & AV_EF_EXPLODE))
1913 mjpeg_decode_dri(s);
1925 av_log(avctx, AV_LOG_ERROR,
1926 "mjpeg: unsupported coding type (%x)\n", start_code);
1930 /* eof process start code */
1931 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1932 av_log(avctx, AV_LOG_DEBUG,
1933 "marker parser used %d bytes (%d bits)\n",
1934 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1936 if (s->got_picture) {
1937 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1940 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1941 return AVERROR_INVALIDDATA;
1947 uint8_t *line = s->picture_ptr->data[s->upscale_h];
1948 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
1949 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1950 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
1951 avctx->pix_fmt == AV_PIX_FMT_YUV440P);
1952 for (i = 0; i < s->chroma_height; i++) {
1953 for (index = s->width - 1; index; index--)
1954 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
1955 line += s->linesize[s->upscale_h];
1959 uint8_t *dst = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(s->height - 1) * s->linesize[s->upscale_v]];
1961 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
1962 w = s->width >> hshift;
1963 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
1964 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1965 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
1966 avctx->pix_fmt == AV_PIX_FMT_YUV422P);
1967 for (i = s->height - 1; i; i--) {
1968 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[i / 2 * s->linesize[s->upscale_v]];
1969 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(i + 1) / 2 * s->linesize[s->upscale_v]];
1971 memcpy(dst, src1, w);
1973 for (index = 0; index < w; index++)
1974 dst[index] = (src1[index] + src2[index]) >> 1;
1976 dst -= s->linesize[s->upscale_v];
1979 if (s->flipped && (s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
1981 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
1982 for (index=0; index<4; index++) {
1983 uint8_t *dst = s->picture_ptr->data[index];
1986 if(index && index<3){
1987 w = FF_CEIL_RSHIFT(w, hshift);
1988 h = FF_CEIL_RSHIFT(h, vshift);
1991 uint8_t *dst2 = dst + s->linesize[index]*(h-1);
1992 for (i=0; i<h/2; i++) {
1994 FFSWAP(int, dst[j], dst2[j]);
1995 dst += s->linesize[index];
1996 dst2 -= s->linesize[index];
2002 av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
2003 av_dict_free(&s->exif_metadata);
2005 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %td bytes\n",
2007 // return buf_end - buf_ptr;
2008 return buf_ptr - buf;
2011 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2013 MJpegDecodeContext *s = avctx->priv_data;
2016 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2017 av_log(avctx, AV_LOG_INFO, "Single field\n");
2021 av_frame_unref(s->picture_ptr);
2024 av_freep(&s->ljpeg_buffer);
2025 s->ljpeg_buffer_size = 0;
2027 for (i = 0; i < 3; i++) {
2028 for (j = 0; j < 4; j++)
2029 ff_free_vlc(&s->vlcs[i][j]);
2031 for (i = 0; i < MAX_COMPONENTS; i++) {
2032 av_freep(&s->blocks[i]);
2033 av_freep(&s->last_nnz[i]);
2035 av_dict_free(&s->exif_metadata);
2039 static void decode_flush(AVCodecContext *avctx)
2041 MJpegDecodeContext *s = avctx->priv_data;
2045 #if CONFIG_MJPEG_DECODER
2046 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2047 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2048 static const AVOption options[] = {
2049 { "extern_huff", "Use external huffman table.",
2050 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
2054 static const AVClass mjpegdec_class = {
2055 .class_name = "MJPEG decoder",
2056 .item_name = av_default_item_name,
2058 .version = LIBAVUTIL_VERSION_INT,
2061 AVCodec ff_mjpeg_decoder = {
2063 .type = AVMEDIA_TYPE_VIDEO,
2064 .id = AV_CODEC_ID_MJPEG,
2065 .priv_data_size = sizeof(MJpegDecodeContext),
2066 .init = ff_mjpeg_decode_init,
2067 .close = ff_mjpeg_decode_end,
2068 .decode = ff_mjpeg_decode_frame,
2069 .flush = decode_flush,
2070 .capabilities = CODEC_CAP_DR1,
2072 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2073 .priv_class = &mjpegdec_class,
2076 #if CONFIG_THP_DECODER
2077 AVCodec ff_thp_decoder = {
2079 .type = AVMEDIA_TYPE_VIDEO,
2080 .id = AV_CODEC_ID_THP,
2081 .priv_data_size = sizeof(MJpegDecodeContext),
2082 .init = ff_mjpeg_decode_init,
2083 .close = ff_mjpeg_decode_end,
2084 .decode = ff_mjpeg_decode_frame,
2085 .flush = decode_flush,
2086 .capabilities = CODEC_CAP_DR1,
2088 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),