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 Libav.
13 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
35 #include "libavutil/imgutils.h"
36 #include "libavutil/opt.h"
43 #include "jpeglsdec.h"
46 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
47 const uint8_t *val_table, int nb_codes,
48 int use_static, int is_ac)
50 uint8_t huff_size[256] = { 0 };
51 uint16_t huff_code[256];
52 uint16_t huff_sym[256];
55 assert(nb_codes <= 256);
57 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
59 for (i = 0; i < 256; i++)
60 huff_sym[i] = i + 16 * is_ac;
63 huff_sym[0] = 16 * 256;
65 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
66 huff_code, 2, 2, huff_sym, 2, 2, use_static);
69 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
71 build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
72 avpriv_mjpeg_val_dc, 12, 0, 0);
73 build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
74 avpriv_mjpeg_val_dc, 12, 0, 0);
75 build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
76 avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
77 build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
78 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
79 build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
80 avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
81 build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
82 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
85 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
87 MJpegDecodeContext *s = avctx->priv_data;
89 if (!s->picture_ptr) {
90 s->picture = av_frame_alloc();
92 return AVERROR(ENOMEM);
93 s->picture_ptr = s->picture;
97 ff_blockdsp_init(&s->bdsp, avctx);
98 ff_hpeldsp_init(&s->hdsp, avctx->flags);
99 ff_idctdsp_init(&s->idsp, avctx);
100 ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
105 s->first_picture = 1;
106 s->org_height = avctx->coded_height;
107 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
108 avctx->colorspace = AVCOL_SPC_BT470BG;
110 build_basic_mjpeg_vlc(s);
112 if (s->extern_huff) {
114 av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
115 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
116 if ((ret = ff_mjpeg_decode_dht(s))) {
117 av_log(avctx, AV_LOG_ERROR,
118 "mjpeg: error using external huffman table\n");
122 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
123 s->interlace_polarity = 1; /* bottom field first */
124 av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
126 if (avctx->codec->id == AV_CODEC_ID_AMV)
133 /* quantize tables */
134 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
136 int len, index, i, j;
138 len = get_bits(&s->gb, 16) - 2;
141 /* only 8 bit precision handled */
142 if (get_bits(&s->gb, 4) != 0) {
143 av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
146 index = get_bits(&s->gb, 4);
149 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
150 /* read quant table */
151 for (i = 0; i < 64; i++) {
152 j = s->scantable.permutated[i];
153 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
156 // XXX FIXME finetune, and perhaps add dc too
157 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
158 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
159 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
160 index, s->qscale[index]);
166 /* decode huffman tables and build VLC decoders */
167 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
169 int len, index, i, class, n, v, code_max;
170 uint8_t bits_table[17];
171 uint8_t val_table[256];
174 len = get_bits(&s->gb, 16) - 2;
178 return AVERROR_INVALIDDATA;
179 class = get_bits(&s->gb, 4);
181 return AVERROR_INVALIDDATA;
182 index = get_bits(&s->gb, 4);
184 return AVERROR_INVALIDDATA;
186 for (i = 1; i <= 16; i++) {
187 bits_table[i] = get_bits(&s->gb, 8);
191 if (len < n || n > 256)
192 return AVERROR_INVALIDDATA;
195 for (i = 0; i < n; i++) {
196 v = get_bits(&s->gb, 8);
203 /* build VLC and flush previous vlc if present */
204 ff_free_vlc(&s->vlcs[class][index]);
205 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
206 class, index, code_max + 1);
207 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
208 code_max + 1, 0, class > 0)) < 0)
212 ff_free_vlc(&s->vlcs[2][index]);
213 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
214 code_max + 1, 0, 0)) < 0)
221 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
223 int h_count[MAX_COMPONENTS] = { 0 };
224 int v_count[MAX_COMPONENTS] = { 0 };
225 int len, nb_components, i, width, height, bits, pix_fmt_id, ret;
227 /* XXX: verify len field validity */
228 len = get_bits(&s->gb, 16);
229 bits = get_bits(&s->gb, 8);
233 if (bits == 9 && !s->pegasus_rct)
234 s->rct = 1; // FIXME ugly
236 if (bits != 8 && !s->lossless) {
237 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\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,
259 "nb_components changing in interlaced picture\n");
260 return AVERROR_INVALIDDATA;
263 if (s->ls && !(bits <= 8 || nb_components == 1)) {
264 avpriv_report_missing_feature(s->avctx,
265 "JPEG-LS that is not <= 8 "
266 "bits/component or 16-bit gray");
267 return AVERROR_PATCHWELCOME;
269 s->nb_components = nb_components;
272 for (i = 0; i < nb_components; i++) {
274 s->component_id[i] = get_bits(&s->gb, 8) - 1;
275 h_count[i] = get_bits(&s->gb, 4);
276 v_count[i] = get_bits(&s->gb, 4);
277 /* compute hmax and vmax (only used in interleaved case) */
278 if (h_count[i] > s->h_max)
279 s->h_max = h_count[i];
280 if (v_count[i] > s->v_max)
281 s->v_max = v_count[i];
282 s->quant_index[i] = get_bits(&s->gb, 8);
283 if (s->quant_index[i] >= 4)
284 return AVERROR_INVALIDDATA;
285 if (!h_count[i] || !v_count[i]) {
286 av_log(s->avctx, AV_LOG_ERROR,
287 "Invalid sampling factor in component %d %d:%d\n",
288 i, h_count[i], v_count[i]);
289 return AVERROR_INVALIDDATA;
292 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
293 i, h_count[i], v_count[i],
294 s->component_id[i], s->quant_index[i]);
297 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
298 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
299 return AVERROR_PATCHWELCOME;
302 if (s->v_max == 1 && s->h_max == 1 && s->lossless == 1)
305 /* if different size, realloc/alloc picture */
306 if (width != s->width || height != s->height || bits != s->bits ||
307 memcmp(s->h_count, h_count, sizeof(h_count)) ||
308 memcmp(s->v_count, v_count, sizeof(v_count))) {
312 memcpy(s->h_count, h_count, sizeof(h_count));
313 memcpy(s->v_count, v_count, sizeof(v_count));
316 /* test interlaced mode */
317 if (s->first_picture &&
318 s->org_height != 0 &&
319 s->height < ((s->org_height * 3) / 4)) {
321 s->bottom_field = s->interlace_polarity;
322 s->picture_ptr->interlaced_frame = 1;
323 s->picture_ptr->top_field_first = !s->interlace_polarity;
327 ret = ff_set_dimensions(s->avctx, width, height);
331 s->first_picture = 0;
334 if (!(s->interlaced && (s->bottom_field == !s->interlace_polarity))) {
335 /* XXX: not complete test ! */
336 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
337 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
338 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
339 (s->h_count[3] << 4) | s->v_count[3];
340 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
341 /* NOTE we do not allocate pictures large enough for the possible
342 * padding of h/v_count being 4 */
343 if (!(pix_fmt_id & 0xD0D0D0D0))
344 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
345 if (!(pix_fmt_id & 0x0D0D0D0D))
346 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
348 switch (pix_fmt_id) {
351 s->avctx->pix_fmt = AV_PIX_FMT_BGRA;
353 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
354 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
356 assert(s->nb_components == 3);
359 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
362 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
363 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
366 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
367 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
370 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
371 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
374 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
375 return AVERROR_PATCHWELCOME;
378 if (s->nb_components > 1)
379 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
380 else if (s->bits <= 8)
381 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
383 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
386 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
388 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
392 av_frame_unref(s->picture_ptr);
393 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0) {
394 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
397 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
398 s->picture_ptr->key_frame = 1;
401 for (i = 0; i < 3; i++)
402 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
404 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
405 s->width, s->height, s->linesize[0], s->linesize[1],
406 s->interlaced, s->avctx->height);
408 if (len != (8 + (3 * nb_components)))
409 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
412 /* totally blank picture as progressive JPEG will only add details to it */
413 if (s->progressive) {
414 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
415 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
416 for (i = 0; i < s->nb_components; i++) {
417 int size = bw * bh * s->h_count[i] * s->v_count[i];
418 av_freep(&s->blocks[i]);
419 av_freep(&s->last_nnz[i]);
420 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
421 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
422 s->block_stride[i] = bw * s->h_count[i];
424 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
429 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
432 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
434 av_log(s->avctx, AV_LOG_WARNING,
435 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
436 0, dc_index, &s->vlcs[0][dc_index]);
441 return get_xbits(&s->gb, code);
446 /* decode block and dequantize */
447 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
448 int dc_index, int ac_index, int16_t *quant_matrix)
450 int code, i, j, level, val;
453 val = mjpeg_decode_dc(s, dc_index);
455 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
456 return AVERROR_INVALIDDATA;
458 val = val * quant_matrix[0] + s->last_dc[component];
459 s->last_dc[component] = val;
463 {OPEN_READER(re, &s->gb);
465 UPDATE_CACHE(re, &s->gb);
466 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
468 i += ((unsigned)code) >> 4;
471 if (code > MIN_CACHE_BITS - 16)
472 UPDATE_CACHE(re, &s->gb);
475 int cache = GET_CACHE(re, &s->gb);
476 int sign = (~cache) >> 31;
477 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
480 LAST_SKIP_BITS(re, &s->gb, code);
483 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
484 return AVERROR_INVALIDDATA;
486 j = s->scantable.permutated[i];
487 block[j] = level * quant_matrix[j];
490 CLOSE_READER(re, &s->gb);}
495 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
496 int component, int dc_index,
497 int16_t *quant_matrix, int Al)
500 s->bdsp.clear_block(block);
501 val = mjpeg_decode_dc(s, dc_index);
503 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
504 return AVERROR_INVALIDDATA;
506 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
507 s->last_dc[component] = val;
512 /* decode block and dequantize - progressive JPEG version */
513 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
514 uint8_t *last_nnz, int ac_index,
515 int16_t *quant_matrix,
516 int ss, int se, int Al, int *EOBRUN)
518 int code, i, j, level, val, run;
526 OPEN_READER(re, &s->gb);
527 for (i = ss; ; i++) {
528 UPDATE_CACHE(re, &s->gb);
529 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
531 run = ((unsigned) code) >> 4;
535 if (code > MIN_CACHE_BITS - 16)
536 UPDATE_CACHE(re, &s->gb);
539 int cache = GET_CACHE(re, &s->gb);
540 int sign = (~cache) >> 31;
541 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
544 LAST_SKIP_BITS(re, &s->gb, code);
548 j = s->scantable.permutated[se];
549 block[j] = level * quant_matrix[j] << Al;
552 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
553 return AVERROR_INVALIDDATA;
555 j = s->scantable.permutated[i];
556 block[j] = level * quant_matrix[j] << Al;
558 if (run == 0xF) {// ZRL - skip 15 coefficients
561 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
562 return AVERROR_INVALIDDATA;
567 UPDATE_CACHE(re, &s->gb);
568 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
569 LAST_SKIP_BITS(re, &s->gb, run);
576 CLOSE_READER(re, &s->gb);
585 #define REFINE_BIT(j) { \
586 UPDATE_CACHE(re, &s->gb); \
587 sign = block[j] >> 15; \
588 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
589 ((quant_matrix[j] ^ sign) - sign) << Al; \
590 LAST_SKIP_BITS(re, &s->gb, 1); \
598 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
603 j = s->scantable.permutated[i]; \
606 else if (run-- == 0) \
610 /* decode block and dequantize - progressive JPEG refinement pass */
611 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
613 int ac_index, int16_t *quant_matrix,
614 int ss, int se, int Al, int *EOBRUN)
616 int code, i = ss, j, sign, val, run;
617 int last = FFMIN(se, *last_nnz);
619 OPEN_READER(re, &s->gb);
624 UPDATE_CACHE(re, &s->gb);
625 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
628 run = ((unsigned) code) >> 4;
629 UPDATE_CACHE(re, &s->gb);
630 val = SHOW_UBITS(re, &s->gb, 1);
631 LAST_SKIP_BITS(re, &s->gb, 1);
633 j = s->scantable.permutated[i];
635 block[j] = ((quant_matrix[j]^val) - val) << Al;
639 CLOSE_READER(re, &s->gb);
643 run = ((unsigned) code) >> 4;
650 UPDATE_CACHE(re, &s->gb);
651 run += SHOW_UBITS(re, &s->gb, val);
652 LAST_SKIP_BITS(re, &s->gb, val);
664 for (; i <= last; i++) {
665 j = s->scantable.permutated[i];
669 CLOSE_READER(re, &s->gb);
676 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor,
680 uint16_t (*buffer)[4];
681 int left[3], top[3], topleft[3];
682 const int linesize = s->linesize[0];
683 const int mask = (1 << s->bits) - 1;
685 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
686 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
687 buffer = s->ljpeg_buffer;
689 for (i = 0; i < 3; i++)
690 buffer[0][i] = 1 << (s->bits + point_transform - 1);
692 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
693 const int modified_predictor = mb_y ? predictor : 1;
694 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
696 if (s->interlaced && s->bottom_field)
697 ptr += linesize >> 1;
699 for (i = 0; i < 3; i++)
700 top[i] = left[i] = topleft[i] = buffer[0][i];
702 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
703 if (s->restart_interval && !s->restart_count)
704 s->restart_count = s->restart_interval;
706 for (i = 0; i < 3; i++) {
710 top[i] = buffer[mb_x][i];
712 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
714 left[i] = buffer[mb_x][i] =
715 mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
718 if (s->restart_interval && !--s->restart_count) {
719 align_get_bits(&s->gb);
720 skip_bits(&s->gb, 16); /* skip RSTn */
725 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
726 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
727 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
728 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
730 } else if (s->pegasus_rct) {
731 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
732 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
733 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
734 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
737 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
738 ptr[4 * mb_x + 0] = buffer[mb_x][2];
739 ptr[4 * mb_x + 1] = buffer[mb_x][1];
740 ptr[4 * mb_x + 2] = buffer[mb_x][0];
747 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
748 int point_transform, int nb_components)
752 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
753 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
754 if (s->restart_interval && !s->restart_count)
755 s->restart_count = s->restart_interval;
757 if (mb_x == 0 || mb_y == 0 || s->interlaced) {
758 for (i = 0; i < nb_components; i++) {
760 int n, h, v, x, y, c, j, linesize;
762 c = s->comp_index[i];
767 linesize = s->linesize[c];
769 for (j = 0; j < n; j++) {
771 // FIXME optimize this crap
772 ptr = s->picture_ptr->data[c] +
773 (linesize * (v * mb_y + y)) +
775 if (y == 0 && mb_y == 0) {
776 if (x == 0 && mb_x == 0)
777 pred = 128 << point_transform;
781 if (x == 0 && mb_x == 0)
782 pred = ptr[-linesize];
784 PREDICT(pred, ptr[-linesize - 1],
785 ptr[-linesize], ptr[-1], predictor);
788 if (s->interlaced && s->bottom_field)
789 ptr += linesize >> 1;
790 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
799 for (i = 0; i < nb_components; i++) {
801 int n, h, v, x, y, c, j, linesize;
803 c = s->comp_index[i];
808 linesize = s->linesize[c];
810 for (j = 0; j < n; j++) {
813 // FIXME optimize this crap
814 ptr = s->picture_ptr->data[c] +
815 (linesize * (v * mb_y + y)) +
817 PREDICT(pred, ptr[-linesize - 1],
818 ptr[-linesize], ptr[-1], predictor);
819 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
827 if (s->restart_interval && !--s->restart_count) {
828 align_get_bits(&s->gb);
829 skip_bits(&s->gb, 16); /* skip RSTn */
836 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
837 int Al, const uint8_t *mb_bitmask,
838 const AVFrame *reference)
841 uint8_t *data[MAX_COMPONENTS];
842 const uint8_t *reference_data[MAX_COMPONENTS];
843 int linesize[MAX_COMPONENTS];
844 GetBitContext mb_bitmask_gb;
847 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
849 for (i = 0; i < nb_components; i++) {
850 int c = s->comp_index[i];
851 data[c] = s->picture_ptr->data[c];
852 reference_data[c] = reference ? reference->data[c] : NULL;
853 linesize[c] = s->linesize[c];
854 s->coefs_finished[c] |= 1;
857 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
858 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
859 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
861 if (s->restart_interval && !s->restart_count)
862 s->restart_count = s->restart_interval;
864 if (get_bits_left(&s->gb) < 0) {
865 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
866 -get_bits_left(&s->gb));
867 return AVERROR_INVALIDDATA;
869 for (i = 0; i < nb_components; i++) {
871 int n, h, v, x, y, c, j;
874 c = s->comp_index[i];
879 for (j = 0; j < n; j++) {
880 block_offset = ((linesize[c] * (v * mb_y + y) * 8) +
883 if (s->interlaced && s->bottom_field)
884 block_offset += linesize[c] >> 1;
885 ptr = data[c] + block_offset;
886 if (!s->progressive) {
888 s->hdsp.put_pixels_tab[1][0](ptr,
889 reference_data[c] + block_offset,
892 s->bdsp.clear_block(s->block);
893 if (decode_block(s, s->block, i,
894 s->dc_index[i], s->ac_index[i],
895 s->quant_matrixes[s->quant_index[c]]) < 0) {
896 av_log(s->avctx, AV_LOG_ERROR,
897 "error y=%d x=%d\n", mb_y, mb_x);
898 return AVERROR_INVALIDDATA;
900 s->idsp.idct_put(ptr, linesize[c], s->block);
903 int block_idx = s->block_stride[c] * (v * mb_y + y) +
905 int16_t *block = s->blocks[c][block_idx];
907 block[0] += get_bits1(&s->gb) *
908 s->quant_matrixes[s->quant_index[c]][0] << Al;
909 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
910 s->quant_matrixes[s->quant_index[c]],
912 av_log(s->avctx, AV_LOG_ERROR,
913 "error y=%d x=%d\n", mb_y, mb_x);
914 return AVERROR_INVALIDDATA;
917 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
918 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
919 mb_x, mb_y, x, y, c, s->bottom_field,
920 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
928 if (s->restart_interval) {
930 i = 8 + ((-get_bits_count(&s->gb)) & 7);
932 if (show_bits(&s->gb, i) == (1 << i) - 1) {
933 int pos = get_bits_count(&s->gb);
934 align_get_bits(&s->gb);
935 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
936 skip_bits(&s->gb, 8);
937 if ((get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
938 for (i = 0; i < nb_components; i++) /* reset dc */
939 s->last_dc[i] = 1024;
941 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
949 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
950 int se, int Ah, int Al,
951 const uint8_t *mb_bitmask,
952 const AVFrame *reference)
956 int c = s->comp_index[0];
957 uint8_t *data = s->picture_ptr->data[c];
958 const uint8_t *reference_data = reference ? reference->data[c] : NULL;
959 int linesize = s->linesize[c];
961 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
962 GetBitContext mb_bitmask_gb;
964 if (ss < 0 || ss >= 64 ||
965 se < ss || se >= 64 ||
967 return AVERROR_INVALIDDATA;
970 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
973 // s->coefs_finished is a bitmask for coefficients coded
974 // ss and se are parameters telling start and end coefficients
975 s->coefs_finished[c] |= (~0ULL >> (63 - (se - ss))) << ss;
976 last_scan = !~s->coefs_finished[c];
979 if (s->interlaced && s->bottom_field) {
980 int offset = linesize >> 1;
982 reference_data += offset;
985 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
986 int block_offset = mb_y * linesize * 8;
987 uint8_t *ptr = data + block_offset;
988 int block_idx = mb_y * s->block_stride[c];
989 int16_t (*block)[64] = &s->blocks[c][block_idx];
990 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
991 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
992 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
997 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
998 quant_matrix, ss, se, Al, &EOBRUN);
1000 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1001 quant_matrix, ss, se, Al, &EOBRUN);
1003 av_log(s->avctx, AV_LOG_ERROR,
1004 "error y=%d x=%d\n", mb_y, mb_x);
1005 return AVERROR_INVALIDDATA;
1011 s->hdsp.put_pixels_tab[1][0](ptr,
1012 reference_data + block_offset,
1015 s->idsp.idct_put(ptr, linesize, *block);
1024 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1025 const AVFrame *reference)
1027 int len, nb_components, i, h, v, predictor, point_transform;
1029 const int block_size = s->lossless ? 1 : 8;
1030 int ilv, prev_shift;
1032 /* XXX: verify len field validity */
1033 len = get_bits(&s->gb, 16);
1034 nb_components = get_bits(&s->gb, 8);
1035 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1036 av_log(s->avctx, AV_LOG_ERROR,
1037 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1038 return AVERROR_PATCHWELCOME;
1040 if (len != 6 + 2 * nb_components) {
1041 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1042 return AVERROR_INVALIDDATA;
1044 for (i = 0; i < nb_components; i++) {
1045 id = get_bits(&s->gb, 8) - 1;
1046 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1047 /* find component index */
1048 for (index = 0; index < s->nb_components; index++)
1049 if (id == s->component_id[index])
1051 if (index == s->nb_components) {
1052 av_log(s->avctx, AV_LOG_ERROR,
1053 "decode_sos: index(%d) out of components\n", index);
1054 return AVERROR_INVALIDDATA;
1056 /* Metasoft MJPEG codec has Cb and Cr swapped */
1057 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1058 && nb_components == 3 && s->nb_components == 3 && i)
1061 s->comp_index[i] = index;
1063 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1064 s->h_scount[i] = s->h_count[index];
1065 s->v_scount[i] = s->v_count[index];
1067 s->dc_index[i] = get_bits(&s->gb, 4);
1068 s->ac_index[i] = get_bits(&s->gb, 4);
1070 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1071 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1073 if (!s->vlcs[0][s->dc_index[i]].table ||
1074 !s->vlcs[1][s->ac_index[i]].table)
1078 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1079 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1080 prev_shift = get_bits(&s->gb, 4); /* Ah */
1081 point_transform = get_bits(&s->gb, 4); /* Al */
1083 if (nb_components > 1) {
1084 /* interleaved stream */
1085 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1086 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1087 } else if (!s->ls) { /* skip this for JPEG-LS */
1088 h = s->h_max / s->h_scount[0];
1089 v = s->v_max / s->v_scount[0];
1090 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1091 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1092 s->nb_blocks[0] = 1;
1097 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1098 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n",
1099 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1100 predictor, point_transform, ilv, s->bits,
1101 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
1104 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1105 for (i = s->mjpb_skiptosod; i > 0; i--)
1106 skip_bits(&s->gb, 8);
1109 for (i = 0; i < nb_components; i++)
1110 s->last_dc[i] = 1024;
1113 if (CONFIG_JPEGLS_DECODER && s->ls) {
1115 // reset_ls_coding_parameters(s, 0);
1117 if ((ret = ff_jpegls_decode_picture(s, predictor,
1118 point_transform, ilv)) < 0)
1122 if ((ret = ljpeg_decode_rgb_scan(s, predictor,
1123 point_transform)) < 0)
1126 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1128 nb_components)) < 0)
1133 if (s->progressive && predictor) {
1134 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1141 if ((ret = mjpeg_decode_scan(s, nb_components,
1142 prev_shift, point_transform,
1143 mb_bitmask, reference)) < 0)
1148 if (s->interlaced &&
1149 get_bits_left(&s->gb) > 32 &&
1150 show_bits(&s->gb, 8) == 0xFF) {
1151 GetBitContext bak = s->gb;
1152 align_get_bits(&bak);
1153 if (show_bits(&bak, 16) == 0xFFD1) {
1154 av_dlog(s->avctx, "AVRn interlaced picture marker found\n");
1156 skip_bits(&s->gb, 16);
1157 s->bottom_field ^= 1;
1166 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1167 return AVERROR_INVALIDDATA;
1170 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1172 if (get_bits(&s->gb, 16) != 4)
1173 return AVERROR_INVALIDDATA;
1174 s->restart_interval = get_bits(&s->gb, 16);
1175 s->restart_count = 0;
1176 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1177 s->restart_interval);
1182 static int mjpeg_decode_app(MJpegDecodeContext *s)
1186 len = get_bits(&s->gb, 16);
1188 return AVERROR_INVALIDDATA;
1189 if (8 * len > get_bits_left(&s->gb))
1190 return AVERROR_INVALIDDATA;
1192 id = get_bits_long(&s->gb, 32);
1193 id = av_be2ne32(id);
1196 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1197 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1199 /* Buggy AVID, it puts EOI only at every 10th frame. */
1200 /* Also, this fourcc is used by non-avid files too, it holds some
1201 information, but it's always present in AVID-created files. */
1202 if (id == AV_RL32("AVI1")) {
1208 4bytes field_size_less_padding
1211 i = get_bits(&s->gb, 8);
1213 s->bottom_field = 1;
1215 s->bottom_field = 0;
1217 skip_bits(&s->gb, 8);
1218 skip_bits(&s->gb, 32);
1219 skip_bits(&s->gb, 32);
1227 if (id == AV_RL32("JFIF")) {
1228 int t_w, t_h, v1, v2;
1229 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1230 v1 = get_bits(&s->gb, 8);
1231 v2 = get_bits(&s->gb, 8);
1232 skip_bits(&s->gb, 8);
1234 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1235 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1236 ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
1238 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1239 av_log(s->avctx, AV_LOG_INFO,
1240 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1242 s->avctx->sample_aspect_ratio.num,
1243 s->avctx->sample_aspect_ratio.den);
1245 t_w = get_bits(&s->gb, 8);
1246 t_h = get_bits(&s->gb, 8);
1248 /* skip thumbnail */
1249 if (len -10 - (t_w * t_h * 3) > 0)
1250 len -= t_w * t_h * 3;
1256 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1257 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1258 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1259 skip_bits(&s->gb, 16); /* version */
1260 skip_bits(&s->gb, 16); /* flags0 */
1261 skip_bits(&s->gb, 16); /* flags1 */
1262 skip_bits(&s->gb, 8); /* transform */
1267 if (id == AV_RL32("LJIF")) {
1268 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1269 av_log(s->avctx, AV_LOG_INFO,
1270 "Pegasus lossless jpeg header found\n");
1271 skip_bits(&s->gb, 16); /* version ? */
1272 skip_bits(&s->gb, 16); /* unknwon always 0? */
1273 skip_bits(&s->gb, 16); /* unknwon always 0? */
1274 skip_bits(&s->gb, 16); /* unknwon always 0? */
1275 switch (get_bits(&s->gb, 8)) {
1285 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1292 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1293 id = get_bits_long(&s->gb, 32);
1294 id = av_be2ne32(id);
1297 if (id == AV_RL32("mjpg")) {
1299 skip_bits(&s->gb, 32); /* field size */
1300 skip_bits(&s->gb, 32); /* pad field size */
1301 skip_bits(&s->gb, 32); /* next off */
1302 skip_bits(&s->gb, 32); /* quant off */
1303 skip_bits(&s->gb, 32); /* huff off */
1304 skip_bits(&s->gb, 32); /* image off */
1305 skip_bits(&s->gb, 32); /* scan off */
1306 skip_bits(&s->gb, 32); /* data off */
1308 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1309 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1314 /* slow but needed for extreme adobe jpegs */
1316 av_log(s->avctx, AV_LOG_ERROR,
1317 "mjpeg: error, decode_app parser read over the end\n");
1319 skip_bits(&s->gb, 8);
1324 static int mjpeg_decode_com(MJpegDecodeContext *s)
1326 int len = get_bits(&s->gb, 16);
1327 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1328 char *cbuf = av_malloc(len - 1);
1331 for (i = 0; i < len - 2; i++)
1332 cbuf[i] = get_bits(&s->gb, 8);
1333 if (i > 0 && cbuf[i - 1] == '\n')
1338 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1339 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1341 /* buggy avid, it puts EOI only at every 10th frame */
1342 if (!strcmp(cbuf, "AVID")) {
1344 } else if (!strcmp(cbuf, "CS=ITU601"))
1346 else if ((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
1347 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1357 /* return the 8 bit start code value and update the search
1358 state. Return -1 if no start code found */
1359 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1361 const uint8_t *buf_ptr;
1368 buf_ptr = *pbuf_ptr;
1369 while (buf_ptr < buf_end) {
1372 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1382 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1383 *pbuf_ptr = buf_ptr;
1387 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1388 const uint8_t **buf_ptr, const uint8_t *buf_end,
1389 const uint8_t **unescaped_buf_ptr,
1390 int *unescaped_buf_size)
1393 start_code = find_marker(buf_ptr, buf_end);
1395 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1397 return AVERROR(ENOMEM);
1399 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1400 if (start_code == SOS && !s->ls) {
1401 const uint8_t *src = *buf_ptr;
1402 uint8_t *dst = s->buffer;
1404 while (src < buf_end) {
1405 uint8_t x = *(src++);
1408 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1410 while (src < buf_end && x == 0xff)
1413 if (x >= 0xd0 && x <= 0xd7)
1420 *unescaped_buf_ptr = s->buffer;
1421 *unescaped_buf_size = dst - s->buffer;
1422 memset(s->buffer + *unescaped_buf_size, 0,
1423 FF_INPUT_BUFFER_PADDING_SIZE);
1425 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1426 (buf_end - *buf_ptr) - (dst - s->buffer));
1427 } else if (start_code == SOS && s->ls) {
1428 const uint8_t *src = *buf_ptr;
1429 uint8_t *dst = s->buffer;
1437 while (src + t < buf_end) {
1438 uint8_t x = src[t++];
1440 while ((src + t < buf_end) && x == 0xff)
1449 init_put_bits(&pb, dst, t);
1451 /* unescape bitstream */
1453 uint8_t x = src[b++];
1454 put_bits(&pb, 8, x);
1457 put_bits(&pb, 7, x);
1461 flush_put_bits(&pb);
1463 *unescaped_buf_ptr = dst;
1464 *unescaped_buf_size = (bit_count + 7) >> 3;
1465 memset(s->buffer + *unescaped_buf_size, 0,
1466 FF_INPUT_BUFFER_PADDING_SIZE);
1468 *unescaped_buf_ptr = *buf_ptr;
1469 *unescaped_buf_size = buf_end - *buf_ptr;
1475 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1478 AVFrame *frame = data;
1479 const uint8_t *buf = avpkt->data;
1480 int buf_size = avpkt->size;
1481 MJpegDecodeContext *s = avctx->priv_data;
1482 const uint8_t *buf_end, *buf_ptr;
1483 const uint8_t *unescaped_buf_ptr;
1484 int unescaped_buf_size;
1488 s->got_picture = 0; // picture from previous image can not be reused
1490 buf_end = buf + buf_size;
1491 while (buf_ptr < buf_end) {
1492 /* find start next marker */
1493 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1495 &unescaped_buf_size);
1497 if (start_code < 0) {
1499 } else if (unescaped_buf_size > INT_MAX / 8) {
1500 av_log(avctx, AV_LOG_ERROR,
1501 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1502 start_code, unescaped_buf_size, buf_size);
1503 return AVERROR_INVALIDDATA;
1506 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1507 start_code, buf_end - buf_ptr);
1509 ret = init_get_bits(&s->gb, unescaped_buf_ptr,
1510 unescaped_buf_size * 8);
1514 s->start_code = start_code;
1515 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1516 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1518 /* process markers */
1519 if (start_code >= 0xd0 && start_code <= 0xd7)
1520 av_log(avctx, AV_LOG_DEBUG,
1521 "restart marker: %d\n", start_code & 0x0f);
1523 else if (start_code >= APP0 && start_code <= APP15)
1524 mjpeg_decode_app(s);
1526 else if (start_code == COM)
1527 mjpeg_decode_com(s);
1529 if (!CONFIG_JPEGLS_DECODER &&
1530 (start_code == SOF48 || start_code == LSE)) {
1531 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
1532 return AVERROR(ENOSYS);
1535 switch (start_code) {
1537 s->restart_interval = 0;
1538 s->restart_count = 0;
1539 /* nothing to do on SOI */
1542 ff_mjpeg_decode_dqt(s);
1545 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1546 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1555 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1562 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1569 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1576 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1580 if (!CONFIG_JPEGLS_DECODER ||
1581 (ret = ff_jpegls_decode_lse(s)) < 0)
1586 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1589 if (!s->got_picture) {
1590 av_log(avctx, AV_LOG_WARNING,
1591 "Found EOI before any SOF, ignoring\n");
1594 if (s->interlaced) {
1595 s->bottom_field ^= 1;
1596 /* if not bottom field, do not output image yet */
1597 if (s->bottom_field == !s->interlace_polarity)
1600 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
1604 for (i = 0; frame->data[i]; i++) {
1605 int h = frame->height >> ((i == 1 || i == 2) ?
1606 s->pix_desc->log2_chroma_h : 0);
1607 frame->data[i] += frame->linesize[i] * (h - 1);
1608 frame->linesize[i] *= -1;
1614 avctx->debug & FF_DEBUG_QP) {
1615 av_log(avctx, AV_LOG_DEBUG,
1616 "QP: %d\n", FFMAX3(s->qscale[0],
1623 if (!s->got_picture) {
1624 av_log(avctx, AV_LOG_WARNING,
1625 "Can not process SOS before SOF, skipping\n");
1628 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1629 (avctx->err_recognition & AV_EF_EXPLODE))
1631 /* buggy avid puts EOI every 10-20th frame */
1632 /* if restart period is over process EOI */
1633 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1637 mjpeg_decode_dri(s);
1649 av_log(avctx, AV_LOG_ERROR,
1650 "mjpeg: unsupported coding type (%x)\n", start_code);
1655 /* eof process start code */
1656 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1657 av_log(avctx, AV_LOG_DEBUG,
1658 "marker parser used %d bytes (%d bits)\n",
1659 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1661 if (s->got_picture) {
1662 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1665 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1666 return AVERROR_INVALIDDATA;
1668 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n",
1670 // return buf_end - buf_ptr;
1671 return buf_ptr - buf;
1674 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1676 MJpegDecodeContext *s = avctx->priv_data;
1680 av_frame_free(&s->picture);
1681 s->picture_ptr = NULL;
1682 } else if (s->picture_ptr)
1683 av_frame_unref(s->picture_ptr);
1686 av_freep(&s->ljpeg_buffer);
1687 s->ljpeg_buffer_size = 0;
1689 for (i = 0; i < 3; i++) {
1690 for (j = 0; j < 4; j++)
1691 ff_free_vlc(&s->vlcs[i][j]);
1693 for (i = 0; i < MAX_COMPONENTS; i++) {
1694 av_freep(&s->blocks[i]);
1695 av_freep(&s->last_nnz[i]);
1700 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1701 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1702 static const AVOption options[] = {
1703 { "extern_huff", "Use external huffman table.",
1704 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
1708 static const AVClass mjpegdec_class = {
1709 .class_name = "MJPEG decoder",
1710 .item_name = av_default_item_name,
1712 .version = LIBAVUTIL_VERSION_INT,
1715 AVCodec ff_mjpeg_decoder = {
1717 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1718 .type = AVMEDIA_TYPE_VIDEO,
1719 .id = AV_CODEC_ID_MJPEG,
1720 .priv_data_size = sizeof(MJpegDecodeContext),
1721 .init = ff_mjpeg_decode_init,
1722 .close = ff_mjpeg_decode_end,
1723 .decode = ff_mjpeg_decode_frame,
1724 .capabilities = CODEC_CAP_DR1,
1725 .priv_class = &mjpegdec_class,
1728 AVCodec ff_thp_decoder = {
1730 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
1731 .type = AVMEDIA_TYPE_VIDEO,
1732 .id = AV_CODEC_ID_THP,
1733 .priv_data_size = sizeof(MJpegDecodeContext),
1734 .init = ff_mjpeg_decode_init,
1735 .close = ff_mjpeg_decode_end,
1736 .decode = ff_mjpeg_decode_frame,
1737 .capabilities = CODEC_CAP_DR1,