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 len, nb_components, i, width, height, pix_fmt_id, ret;
225 /* XXX: verify len field validity */
226 len = get_bits(&s->gb, 16);
227 s->bits = get_bits(&s->gb, 8);
231 if (s->bits == 9 && !s->pegasus_rct)
232 s->rct = 1; // FIXME ugly
234 if (s->bits != 8 && !s->lossless) {
235 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
239 height = get_bits(&s->gb, 16);
240 width = get_bits(&s->gb, 16);
242 // HACK for odd_height.mov
243 if (s->interlaced && s->width == width && s->height == height + 1)
246 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
247 if (av_image_check_size(width, height, 0, s->avctx))
248 return AVERROR_INVALIDDATA;
250 nb_components = get_bits(&s->gb, 8);
251 if (nb_components <= 0 ||
252 nb_components > MAX_COMPONENTS)
254 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
255 if (nb_components != s->nb_components) {
256 av_log(s->avctx, AV_LOG_ERROR,
257 "nb_components changing in interlaced picture\n");
258 return AVERROR_INVALIDDATA;
261 if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
262 avpriv_report_missing_feature(s->avctx,
263 "JPEG-LS that is not <= 8 "
264 "bits/component or 16-bit gray");
265 return AVERROR_PATCHWELCOME;
267 s->nb_components = nb_components;
270 for (i = 0; i < nb_components; i++) {
272 s->component_id[i] = get_bits(&s->gb, 8) - 1;
273 s->h_count[i] = get_bits(&s->gb, 4);
274 s->v_count[i] = get_bits(&s->gb, 4);
275 /* compute hmax and vmax (only used in interleaved case) */
276 if (s->h_count[i] > s->h_max)
277 s->h_max = s->h_count[i];
278 if (s->v_count[i] > s->v_max)
279 s->v_max = s->v_count[i];
280 s->quant_index[i] = get_bits(&s->gb, 8);
281 if (s->quant_index[i] >= 4)
282 return AVERROR_INVALIDDATA;
283 if (!s->h_count[i] || !s->v_count[i]) {
284 av_log(s->avctx, AV_LOG_ERROR,
285 "Invalid sampling factor in component %d %d:%d\n",
286 i, s->h_count[i], s->v_count[i]);
287 return AVERROR_INVALIDDATA;
290 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
291 i, s->h_count[i], s->v_count[i],
292 s->component_id[i], s->quant_index[i]);
295 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
296 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
297 return AVERROR_PATCHWELCOME;
300 if (s->v_max == 1 && s->h_max == 1 && s->lossless == 1)
303 /* if different size, realloc/alloc picture */
304 /* XXX: also check h_count and v_count */
305 if (width != s->width || height != s->height) {
310 /* test interlaced mode */
311 if (s->first_picture &&
312 s->org_height != 0 &&
313 s->height < ((s->org_height * 3) / 4)) {
315 s->bottom_field = s->interlace_polarity;
316 s->picture_ptr->interlaced_frame = 1;
317 s->picture_ptr->top_field_first = !s->interlace_polarity;
321 ret = ff_set_dimensions(s->avctx, width, height);
325 s->first_picture = 0;
328 if (!(s->interlaced && (s->bottom_field == !s->interlace_polarity))) {
329 /* XXX: not complete test ! */
330 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
331 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
332 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
333 (s->h_count[3] << 4) | s->v_count[3];
334 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
335 /* NOTE we do not allocate pictures large enough for the possible
336 * padding of h/v_count being 4 */
337 if (!(pix_fmt_id & 0xD0D0D0D0))
338 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
339 if (!(pix_fmt_id & 0x0D0D0D0D))
340 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
342 switch (pix_fmt_id) {
345 s->avctx->pix_fmt = AV_PIX_FMT_BGRA;
347 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
348 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
350 assert(s->nb_components == 3);
353 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
356 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
357 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
360 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
361 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
364 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
365 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
368 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
369 return AVERROR_PATCHWELCOME;
372 if (s->nb_components > 1)
373 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
374 else if (s->bits <= 8)
375 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
377 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
380 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
382 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
386 av_frame_unref(s->picture_ptr);
387 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0) {
388 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
391 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
392 s->picture_ptr->key_frame = 1;
395 for (i = 0; i < 3; i++)
396 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
398 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
399 s->width, s->height, s->linesize[0], s->linesize[1],
400 s->interlaced, s->avctx->height);
402 if (len != (8 + (3 * nb_components)))
403 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
406 /* totally blank picture as progressive JPEG will only add details to it */
407 if (s->progressive) {
408 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
409 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
410 for (i = 0; i < s->nb_components; i++) {
411 int size = bw * bh * s->h_count[i] * s->v_count[i];
412 av_freep(&s->blocks[i]);
413 av_freep(&s->last_nnz[i]);
414 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
415 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
416 s->block_stride[i] = bw * s->h_count[i];
418 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
423 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
426 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
428 av_log(s->avctx, AV_LOG_WARNING,
429 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
430 0, dc_index, &s->vlcs[0][dc_index]);
435 return get_xbits(&s->gb, code);
440 /* decode block and dequantize */
441 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
442 int dc_index, int ac_index, int16_t *quant_matrix)
444 int code, i, j, level, val;
447 val = mjpeg_decode_dc(s, dc_index);
449 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
450 return AVERROR_INVALIDDATA;
452 val = val * quant_matrix[0] + s->last_dc[component];
453 s->last_dc[component] = val;
457 {OPEN_READER(re, &s->gb);
459 UPDATE_CACHE(re, &s->gb);
460 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
462 i += ((unsigned)code) >> 4;
465 if (code > MIN_CACHE_BITS - 16)
466 UPDATE_CACHE(re, &s->gb);
469 int cache = GET_CACHE(re, &s->gb);
470 int sign = (~cache) >> 31;
471 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
474 LAST_SKIP_BITS(re, &s->gb, code);
477 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
478 return AVERROR_INVALIDDATA;
480 j = s->scantable.permutated[i];
481 block[j] = level * quant_matrix[j];
484 CLOSE_READER(re, &s->gb);}
489 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
490 int component, int dc_index,
491 int16_t *quant_matrix, int Al)
494 s->bdsp.clear_block(block);
495 val = mjpeg_decode_dc(s, dc_index);
497 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
498 return AVERROR_INVALIDDATA;
500 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
501 s->last_dc[component] = val;
506 /* decode block and dequantize - progressive JPEG version */
507 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
508 uint8_t *last_nnz, int ac_index,
509 int16_t *quant_matrix,
510 int ss, int se, int Al, int *EOBRUN)
512 int code, i, j, level, val, run;
520 OPEN_READER(re, &s->gb);
521 for (i = ss; ; i++) {
522 UPDATE_CACHE(re, &s->gb);
523 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
525 run = ((unsigned) code) >> 4;
529 if (code > MIN_CACHE_BITS - 16)
530 UPDATE_CACHE(re, &s->gb);
533 int cache = GET_CACHE(re, &s->gb);
534 int sign = (~cache) >> 31;
535 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
538 LAST_SKIP_BITS(re, &s->gb, code);
542 j = s->scantable.permutated[se];
543 block[j] = level * quant_matrix[j] << Al;
546 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
547 return AVERROR_INVALIDDATA;
549 j = s->scantable.permutated[i];
550 block[j] = level * quant_matrix[j] << Al;
552 if (run == 0xF) {// ZRL - skip 15 coefficients
555 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
556 return AVERROR_INVALIDDATA;
561 UPDATE_CACHE(re, &s->gb);
562 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
563 LAST_SKIP_BITS(re, &s->gb, run);
570 CLOSE_READER(re, &s->gb);
579 #define REFINE_BIT(j) { \
580 UPDATE_CACHE(re, &s->gb); \
581 sign = block[j] >> 15; \
582 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
583 ((quant_matrix[j] ^ sign) - sign) << Al; \
584 LAST_SKIP_BITS(re, &s->gb, 1); \
592 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
597 j = s->scantable.permutated[i]; \
600 else if (run-- == 0) \
604 /* decode block and dequantize - progressive JPEG refinement pass */
605 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
607 int ac_index, int16_t *quant_matrix,
608 int ss, int se, int Al, int *EOBRUN)
610 int code, i = ss, j, sign, val, run;
611 int last = FFMIN(se, *last_nnz);
613 OPEN_READER(re, &s->gb);
618 UPDATE_CACHE(re, &s->gb);
619 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
622 run = ((unsigned) code) >> 4;
623 UPDATE_CACHE(re, &s->gb);
624 val = SHOW_UBITS(re, &s->gb, 1);
625 LAST_SKIP_BITS(re, &s->gb, 1);
627 j = s->scantable.permutated[i];
629 block[j] = ((quant_matrix[j]^val) - val) << Al;
633 CLOSE_READER(re, &s->gb);
637 run = ((unsigned) code) >> 4;
644 UPDATE_CACHE(re, &s->gb);
645 run += SHOW_UBITS(re, &s->gb, val);
646 LAST_SKIP_BITS(re, &s->gb, val);
658 for (; i <= last; i++) {
659 j = s->scantable.permutated[i];
663 CLOSE_READER(re, &s->gb);
670 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor,
674 uint16_t (*buffer)[4];
675 int left[3], top[3], topleft[3];
676 const int linesize = s->linesize[0];
677 const int mask = (1 << s->bits) - 1;
679 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
680 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
681 buffer = s->ljpeg_buffer;
683 for (i = 0; i < 3; i++)
684 buffer[0][i] = 1 << (s->bits + point_transform - 1);
686 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
687 const int modified_predictor = mb_y ? predictor : 1;
688 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
690 if (s->interlaced && s->bottom_field)
691 ptr += linesize >> 1;
693 for (i = 0; i < 3; i++)
694 top[i] = left[i] = topleft[i] = buffer[0][i];
696 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
697 if (s->restart_interval && !s->restart_count)
698 s->restart_count = s->restart_interval;
700 for (i = 0; i < 3; i++) {
704 top[i] = buffer[mb_x][i];
706 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
708 left[i] = buffer[mb_x][i] =
709 mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
712 if (s->restart_interval && !--s->restart_count) {
713 align_get_bits(&s->gb);
714 skip_bits(&s->gb, 16); /* skip RSTn */
719 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
720 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
721 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
722 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
724 } else if (s->pegasus_rct) {
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]) >> 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];
731 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
732 ptr[4 * mb_x + 0] = buffer[mb_x][2];
733 ptr[4 * mb_x + 1] = buffer[mb_x][1];
734 ptr[4 * mb_x + 2] = buffer[mb_x][0];
741 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
742 int point_transform, int nb_components)
746 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
747 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
748 if (s->restart_interval && !s->restart_count)
749 s->restart_count = s->restart_interval;
751 if (mb_x == 0 || mb_y == 0 || s->interlaced) {
752 for (i = 0; i < nb_components; i++) {
754 int n, h, v, x, y, c, j, linesize;
756 c = s->comp_index[i];
761 linesize = s->linesize[c];
763 for (j = 0; j < n; j++) {
765 // FIXME optimize this crap
766 ptr = s->picture_ptr->data[c] +
767 (linesize * (v * mb_y + y)) +
769 if (y == 0 && mb_y == 0) {
770 if (x == 0 && mb_x == 0)
771 pred = 128 << point_transform;
775 if (x == 0 && mb_x == 0)
776 pred = ptr[-linesize];
778 PREDICT(pred, ptr[-linesize - 1],
779 ptr[-linesize], ptr[-1], predictor);
782 if (s->interlaced && s->bottom_field)
783 ptr += linesize >> 1;
784 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
793 for (i = 0; i < nb_components; i++) {
795 int n, h, v, x, y, c, j, linesize;
797 c = s->comp_index[i];
802 linesize = s->linesize[c];
804 for (j = 0; j < n; j++) {
807 // FIXME optimize this crap
808 ptr = s->picture_ptr->data[c] +
809 (linesize * (v * mb_y + y)) +
811 PREDICT(pred, ptr[-linesize - 1],
812 ptr[-linesize], ptr[-1], predictor);
813 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
821 if (s->restart_interval && !--s->restart_count) {
822 align_get_bits(&s->gb);
823 skip_bits(&s->gb, 16); /* skip RSTn */
830 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
831 int Al, const uint8_t *mb_bitmask,
832 const AVFrame *reference)
835 uint8_t *data[MAX_COMPONENTS];
836 const uint8_t *reference_data[MAX_COMPONENTS];
837 int linesize[MAX_COMPONENTS];
838 GetBitContext mb_bitmask_gb;
841 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
843 for (i = 0; i < nb_components; i++) {
844 int c = s->comp_index[i];
845 data[c] = s->picture_ptr->data[c];
846 reference_data[c] = reference ? reference->data[c] : NULL;
847 linesize[c] = s->linesize[c];
848 s->coefs_finished[c] |= 1;
851 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
852 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
853 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
855 if (s->restart_interval && !s->restart_count)
856 s->restart_count = s->restart_interval;
858 if (get_bits_left(&s->gb) < 0) {
859 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
860 -get_bits_left(&s->gb));
861 return AVERROR_INVALIDDATA;
863 for (i = 0; i < nb_components; i++) {
865 int n, h, v, x, y, c, j;
868 c = s->comp_index[i];
873 for (j = 0; j < n; j++) {
874 block_offset = ((linesize[c] * (v * mb_y + y) * 8) +
877 if (s->interlaced && s->bottom_field)
878 block_offset += linesize[c] >> 1;
879 ptr = data[c] + block_offset;
880 if (!s->progressive) {
882 s->hdsp.put_pixels_tab[1][0](ptr,
883 reference_data[c] + block_offset,
886 s->bdsp.clear_block(s->block);
887 if (decode_block(s, s->block, i,
888 s->dc_index[i], s->ac_index[i],
889 s->quant_matrixes[s->quant_index[c]]) < 0) {
890 av_log(s->avctx, AV_LOG_ERROR,
891 "error y=%d x=%d\n", mb_y, mb_x);
892 return AVERROR_INVALIDDATA;
894 s->idsp.idct_put(ptr, linesize[c], s->block);
897 int block_idx = s->block_stride[c] * (v * mb_y + y) +
899 int16_t *block = s->blocks[c][block_idx];
901 block[0] += get_bits1(&s->gb) *
902 s->quant_matrixes[s->quant_index[c]][0] << Al;
903 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
904 s->quant_matrixes[s->quant_index[c]],
906 av_log(s->avctx, AV_LOG_ERROR,
907 "error y=%d x=%d\n", mb_y, mb_x);
908 return AVERROR_INVALIDDATA;
911 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
912 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
913 mb_x, mb_y, x, y, c, s->bottom_field,
914 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
922 if (s->restart_interval) {
924 i = 8 + ((-get_bits_count(&s->gb)) & 7);
926 if (show_bits(&s->gb, i) == (1 << i) - 1) {
927 int pos = get_bits_count(&s->gb);
928 align_get_bits(&s->gb);
929 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
930 skip_bits(&s->gb, 8);
931 if ((get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
932 for (i = 0; i < nb_components; i++) /* reset dc */
933 s->last_dc[i] = 1024;
935 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
943 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
944 int se, int Ah, int Al,
945 const uint8_t *mb_bitmask,
946 const AVFrame *reference)
950 int c = s->comp_index[0];
951 uint8_t *data = s->picture_ptr->data[c];
952 const uint8_t *reference_data = reference ? reference->data[c] : NULL;
953 int linesize = s->linesize[c];
955 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
956 GetBitContext mb_bitmask_gb;
958 if (ss < 0 || ss >= 64 ||
959 se < ss || se >= 64 ||
961 return AVERROR_INVALIDDATA;
964 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
967 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
968 last_scan = !~s->coefs_finished[c];
971 if (s->interlaced && s->bottom_field) {
972 int offset = linesize >> 1;
974 reference_data += offset;
977 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
978 int block_offset = mb_y * linesize * 8;
979 uint8_t *ptr = data + block_offset;
980 int block_idx = mb_y * s->block_stride[c];
981 int16_t (*block)[64] = &s->blocks[c][block_idx];
982 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
983 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
984 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
989 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
990 quant_matrix, ss, se, Al, &EOBRUN);
992 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
993 quant_matrix, ss, se, Al, &EOBRUN);
995 av_log(s->avctx, AV_LOG_ERROR,
996 "error y=%d x=%d\n", mb_y, mb_x);
997 return AVERROR_INVALIDDATA;
1003 s->hdsp.put_pixels_tab[1][0](ptr,
1004 reference_data + block_offset,
1007 s->idsp.idct_put(ptr, linesize, *block);
1016 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1017 const AVFrame *reference)
1019 int len, nb_components, i, h, v, predictor, point_transform;
1021 const int block_size = s->lossless ? 1 : 8;
1022 int ilv, prev_shift;
1024 /* XXX: verify len field validity */
1025 len = get_bits(&s->gb, 16);
1026 nb_components = get_bits(&s->gb, 8);
1027 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1028 av_log(s->avctx, AV_LOG_ERROR,
1029 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1030 return AVERROR_PATCHWELCOME;
1032 if (len != 6 + 2 * nb_components) {
1033 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1034 return AVERROR_INVALIDDATA;
1036 for (i = 0; i < nb_components; i++) {
1037 id = get_bits(&s->gb, 8) - 1;
1038 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1039 /* find component index */
1040 for (index = 0; index < s->nb_components; index++)
1041 if (id == s->component_id[index])
1043 if (index == s->nb_components) {
1044 av_log(s->avctx, AV_LOG_ERROR,
1045 "decode_sos: index(%d) out of components\n", index);
1046 return AVERROR_INVALIDDATA;
1048 /* Metasoft MJPEG codec has Cb and Cr swapped */
1049 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1050 && nb_components == 3 && s->nb_components == 3 && i)
1053 s->comp_index[i] = index;
1055 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1056 s->h_scount[i] = s->h_count[index];
1057 s->v_scount[i] = s->v_count[index];
1059 s->dc_index[i] = get_bits(&s->gb, 4);
1060 s->ac_index[i] = get_bits(&s->gb, 4);
1062 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1063 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1065 if (!s->vlcs[0][s->dc_index[i]].table ||
1066 !s->vlcs[1][s->ac_index[i]].table)
1070 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1071 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1072 prev_shift = get_bits(&s->gb, 4); /* Ah */
1073 point_transform = get_bits(&s->gb, 4); /* Al */
1075 if (nb_components > 1) {
1076 /* interleaved stream */
1077 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1078 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1079 } else if (!s->ls) { /* skip this for JPEG-LS */
1080 h = s->h_max / s->h_scount[0];
1081 v = s->v_max / s->v_scount[0];
1082 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1083 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1084 s->nb_blocks[0] = 1;
1089 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1090 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n",
1091 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1092 predictor, point_transform, ilv, s->bits,
1093 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
1096 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1097 for (i = s->mjpb_skiptosod; i > 0; i--)
1098 skip_bits(&s->gb, 8);
1101 for (i = 0; i < nb_components; i++)
1102 s->last_dc[i] = 1024;
1105 if (CONFIG_JPEGLS_DECODER && s->ls) {
1107 // reset_ls_coding_parameters(s, 0);
1109 if ((ret = ff_jpegls_decode_picture(s, predictor,
1110 point_transform, ilv)) < 0)
1114 if ((ret = ljpeg_decode_rgb_scan(s, predictor,
1115 point_transform)) < 0)
1118 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1120 nb_components)) < 0)
1125 if (s->progressive && predictor) {
1126 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1133 if ((ret = mjpeg_decode_scan(s, nb_components,
1134 prev_shift, point_transform,
1135 mb_bitmask, reference)) < 0)
1140 if (s->interlaced &&
1141 get_bits_left(&s->gb) > 32 &&
1142 show_bits(&s->gb, 8) == 0xFF) {
1143 GetBitContext bak = s->gb;
1144 align_get_bits(&bak);
1145 if (show_bits(&bak, 16) == 0xFFD1) {
1146 av_dlog(s->avctx, "AVRn interlaced picture marker found\n");
1148 skip_bits(&s->gb, 16);
1149 s->bottom_field ^= 1;
1158 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1159 return AVERROR_INVALIDDATA;
1162 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1164 if (get_bits(&s->gb, 16) != 4)
1165 return AVERROR_INVALIDDATA;
1166 s->restart_interval = get_bits(&s->gb, 16);
1167 s->restart_count = 0;
1168 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1169 s->restart_interval);
1174 static int mjpeg_decode_app(MJpegDecodeContext *s)
1178 len = get_bits(&s->gb, 16);
1180 return AVERROR_INVALIDDATA;
1181 if (8 * len > get_bits_left(&s->gb))
1182 return AVERROR_INVALIDDATA;
1184 id = get_bits_long(&s->gb, 32);
1185 id = av_be2ne32(id);
1188 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1189 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1191 /* Buggy AVID, it puts EOI only at every 10th frame. */
1192 /* Also, this fourcc is used by non-avid files too, it holds some
1193 information, but it's always present in AVID-created files. */
1194 if (id == AV_RL32("AVI1")) {
1200 4bytes field_size_less_padding
1203 i = get_bits(&s->gb, 8);
1205 s->bottom_field = 1;
1207 s->bottom_field = 0;
1209 skip_bits(&s->gb, 8);
1210 skip_bits(&s->gb, 32);
1211 skip_bits(&s->gb, 32);
1219 if (id == AV_RL32("JFIF")) {
1220 int t_w, t_h, v1, v2;
1221 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1222 v1 = get_bits(&s->gb, 8);
1223 v2 = get_bits(&s->gb, 8);
1224 skip_bits(&s->gb, 8);
1226 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1227 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1228 ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
1230 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1231 av_log(s->avctx, AV_LOG_INFO,
1232 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1234 s->avctx->sample_aspect_ratio.num,
1235 s->avctx->sample_aspect_ratio.den);
1237 t_w = get_bits(&s->gb, 8);
1238 t_h = get_bits(&s->gb, 8);
1240 /* skip thumbnail */
1241 if (len -10 - (t_w * t_h * 3) > 0)
1242 len -= t_w * t_h * 3;
1248 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1249 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1250 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1251 skip_bits(&s->gb, 16); /* version */
1252 skip_bits(&s->gb, 16); /* flags0 */
1253 skip_bits(&s->gb, 16); /* flags1 */
1254 skip_bits(&s->gb, 8); /* transform */
1259 if (id == AV_RL32("LJIF")) {
1260 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1261 av_log(s->avctx, AV_LOG_INFO,
1262 "Pegasus lossless jpeg header found\n");
1263 skip_bits(&s->gb, 16); /* version ? */
1264 skip_bits(&s->gb, 16); /* unknwon always 0? */
1265 skip_bits(&s->gb, 16); /* unknwon always 0? */
1266 skip_bits(&s->gb, 16); /* unknwon always 0? */
1267 switch (get_bits(&s->gb, 8)) {
1277 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1284 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1285 id = get_bits_long(&s->gb, 32);
1286 id = av_be2ne32(id);
1289 if (id == AV_RL32("mjpg")) {
1291 skip_bits(&s->gb, 32); /* field size */
1292 skip_bits(&s->gb, 32); /* pad field size */
1293 skip_bits(&s->gb, 32); /* next off */
1294 skip_bits(&s->gb, 32); /* quant off */
1295 skip_bits(&s->gb, 32); /* huff off */
1296 skip_bits(&s->gb, 32); /* image off */
1297 skip_bits(&s->gb, 32); /* scan off */
1298 skip_bits(&s->gb, 32); /* data off */
1300 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1301 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1306 /* slow but needed for extreme adobe jpegs */
1308 av_log(s->avctx, AV_LOG_ERROR,
1309 "mjpeg: error, decode_app parser read over the end\n");
1311 skip_bits(&s->gb, 8);
1316 static int mjpeg_decode_com(MJpegDecodeContext *s)
1318 int len = get_bits(&s->gb, 16);
1319 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1320 char *cbuf = av_malloc(len - 1);
1323 for (i = 0; i < len - 2; i++)
1324 cbuf[i] = get_bits(&s->gb, 8);
1325 if (i > 0 && cbuf[i - 1] == '\n')
1330 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1331 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1333 /* buggy avid, it puts EOI only at every 10th frame */
1334 if (!strcmp(cbuf, "AVID")) {
1336 } else if (!strcmp(cbuf, "CS=ITU601"))
1338 else if ((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
1339 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1349 /* return the 8 bit start code value and update the search
1350 state. Return -1 if no start code found */
1351 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1353 const uint8_t *buf_ptr;
1360 buf_ptr = *pbuf_ptr;
1361 while (buf_ptr < buf_end) {
1364 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1374 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1375 *pbuf_ptr = buf_ptr;
1379 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1380 const uint8_t **buf_ptr, const uint8_t *buf_end,
1381 const uint8_t **unescaped_buf_ptr,
1382 int *unescaped_buf_size)
1385 start_code = find_marker(buf_ptr, buf_end);
1387 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1389 return AVERROR(ENOMEM);
1391 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1392 if (start_code == SOS && !s->ls) {
1393 const uint8_t *src = *buf_ptr;
1394 uint8_t *dst = s->buffer;
1396 while (src < buf_end) {
1397 uint8_t x = *(src++);
1400 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1402 while (src < buf_end && x == 0xff)
1405 if (x >= 0xd0 && x <= 0xd7)
1412 *unescaped_buf_ptr = s->buffer;
1413 *unescaped_buf_size = dst - s->buffer;
1414 memset(s->buffer + *unescaped_buf_size, 0,
1415 FF_INPUT_BUFFER_PADDING_SIZE);
1417 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1418 (buf_end - *buf_ptr) - (dst - s->buffer));
1419 } else if (start_code == SOS && s->ls) {
1420 const uint8_t *src = *buf_ptr;
1421 uint8_t *dst = s->buffer;
1429 while (src + t < buf_end) {
1430 uint8_t x = src[t++];
1432 while ((src + t < buf_end) && x == 0xff)
1441 init_put_bits(&pb, dst, t);
1443 /* unescape bitstream */
1445 uint8_t x = src[b++];
1446 put_bits(&pb, 8, x);
1449 put_bits(&pb, 7, x);
1453 flush_put_bits(&pb);
1455 *unescaped_buf_ptr = dst;
1456 *unescaped_buf_size = (bit_count + 7) >> 3;
1457 memset(s->buffer + *unescaped_buf_size, 0,
1458 FF_INPUT_BUFFER_PADDING_SIZE);
1460 *unescaped_buf_ptr = *buf_ptr;
1461 *unescaped_buf_size = buf_end - *buf_ptr;
1467 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1470 AVFrame *frame = data;
1471 const uint8_t *buf = avpkt->data;
1472 int buf_size = avpkt->size;
1473 MJpegDecodeContext *s = avctx->priv_data;
1474 const uint8_t *buf_end, *buf_ptr;
1475 const uint8_t *unescaped_buf_ptr;
1476 int unescaped_buf_size;
1480 s->got_picture = 0; // picture from previous image can not be reused
1482 buf_end = buf + buf_size;
1483 while (buf_ptr < buf_end) {
1484 /* find start next marker */
1485 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1487 &unescaped_buf_size);
1489 if (start_code < 0) {
1491 } else if (unescaped_buf_size > INT_MAX / 8) {
1492 av_log(avctx, AV_LOG_ERROR,
1493 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1494 start_code, unescaped_buf_size, buf_size);
1495 return AVERROR_INVALIDDATA;
1498 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1499 start_code, buf_end - buf_ptr);
1501 ret = init_get_bits(&s->gb, unescaped_buf_ptr,
1502 unescaped_buf_size * 8);
1506 s->start_code = start_code;
1507 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1508 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1510 /* process markers */
1511 if (start_code >= 0xd0 && start_code <= 0xd7)
1512 av_log(avctx, AV_LOG_DEBUG,
1513 "restart marker: %d\n", start_code & 0x0f);
1515 else if (start_code >= APP0 && start_code <= APP15)
1516 mjpeg_decode_app(s);
1518 else if (start_code == COM)
1519 mjpeg_decode_com(s);
1521 if (!CONFIG_JPEGLS_DECODER &&
1522 (start_code == SOF48 || start_code == LSE)) {
1523 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
1524 return AVERROR(ENOSYS);
1527 switch (start_code) {
1529 s->restart_interval = 0;
1530 s->restart_count = 0;
1531 /* nothing to do on SOI */
1534 ff_mjpeg_decode_dqt(s);
1537 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1538 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1547 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1554 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1561 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1568 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1572 if (!CONFIG_JPEGLS_DECODER ||
1573 (ret = ff_jpegls_decode_lse(s)) < 0)
1578 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1581 if (!s->got_picture) {
1582 av_log(avctx, AV_LOG_WARNING,
1583 "Found EOI before any SOF, ignoring\n");
1586 if (s->interlaced) {
1587 s->bottom_field ^= 1;
1588 /* if not bottom field, do not output image yet */
1589 if (s->bottom_field == !s->interlace_polarity)
1592 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
1596 for (i = 0; frame->data[i]; i++) {
1597 int h = frame->height >> ((i == 1 || i == 2) ?
1598 s->pix_desc->log2_chroma_h : 0);
1599 frame->data[i] += frame->linesize[i] * (h - 1);
1600 frame->linesize[i] *= -1;
1606 avctx->debug & FF_DEBUG_QP) {
1607 av_log(avctx, AV_LOG_DEBUG,
1608 "QP: %d\n", FFMAX3(s->qscale[0],
1615 if (!s->got_picture) {
1616 av_log(avctx, AV_LOG_WARNING,
1617 "Can not process SOS before SOF, skipping\n");
1620 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1621 (avctx->err_recognition & AV_EF_EXPLODE))
1623 /* buggy avid puts EOI every 10-20th frame */
1624 /* if restart period is over process EOI */
1625 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1629 mjpeg_decode_dri(s);
1641 av_log(avctx, AV_LOG_ERROR,
1642 "mjpeg: unsupported coding type (%x)\n", start_code);
1647 /* eof process start code */
1648 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1649 av_log(avctx, AV_LOG_DEBUG,
1650 "marker parser used %d bytes (%d bits)\n",
1651 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1653 if (s->got_picture) {
1654 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1657 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1658 return AVERROR_INVALIDDATA;
1660 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n",
1662 // return buf_end - buf_ptr;
1663 return buf_ptr - buf;
1666 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1668 MJpegDecodeContext *s = avctx->priv_data;
1672 av_frame_free(&s->picture);
1673 s->picture_ptr = NULL;
1674 } else if (s->picture_ptr)
1675 av_frame_unref(s->picture_ptr);
1678 av_freep(&s->ljpeg_buffer);
1679 s->ljpeg_buffer_size = 0;
1681 for (i = 0; i < 3; i++) {
1682 for (j = 0; j < 4; j++)
1683 ff_free_vlc(&s->vlcs[i][j]);
1685 for (i = 0; i < MAX_COMPONENTS; i++) {
1686 av_freep(&s->blocks[i]);
1687 av_freep(&s->last_nnz[i]);
1692 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1693 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1694 static const AVOption options[] = {
1695 { "extern_huff", "Use external huffman table.",
1696 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
1700 static const AVClass mjpegdec_class = {
1701 .class_name = "MJPEG decoder",
1702 .item_name = av_default_item_name,
1704 .version = LIBAVUTIL_VERSION_INT,
1707 AVCodec ff_mjpeg_decoder = {
1709 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1710 .type = AVMEDIA_TYPE_VIDEO,
1711 .id = AV_CODEC_ID_MJPEG,
1712 .priv_data_size = sizeof(MJpegDecodeContext),
1713 .init = ff_mjpeg_decode_init,
1714 .close = ff_mjpeg_decode_end,
1715 .decode = ff_mjpeg_decode_frame,
1716 .capabilities = CODEC_CAP_DR1,
1717 .priv_class = &mjpegdec_class,
1720 AVCodec ff_thp_decoder = {
1722 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
1723 .type = AVMEDIA_TYPE_VIDEO,
1724 .id = AV_CODEC_ID_THP,
1725 .priv_data_size = sizeof(MJpegDecodeContext),
1726 .init = ff_mjpeg_decode_init,
1727 .close = ff_mjpeg_decode_end,
1728 .decode = ff_mjpeg_decode_frame,
1729 .capabilities = CODEC_CAP_DR1,