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"
42 #include "jpeglsdec.h"
45 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
46 const uint8_t *val_table, int nb_codes,
47 int use_static, int is_ac)
49 uint8_t huff_size[256] = { 0 };
50 uint16_t huff_code[256];
51 uint16_t huff_sym[256];
54 assert(nb_codes <= 256);
56 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
58 for (i = 0; i < 256; i++)
59 huff_sym[i] = i + 16 * is_ac;
62 huff_sym[0] = 16 * 256;
64 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
65 huff_code, 2, 2, huff_sym, 2, 2, use_static);
68 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
70 build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
71 avpriv_mjpeg_val_dc, 12, 0, 0);
72 build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
73 avpriv_mjpeg_val_dc, 12, 0, 0);
74 build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
75 avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
76 build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
77 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
78 build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
79 avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
80 build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
81 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
84 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
86 MJpegDecodeContext *s = avctx->priv_data;
88 if (!s->picture_ptr) {
89 s->picture = av_frame_alloc();
91 return AVERROR(ENOMEM);
92 s->picture_ptr = s->picture;
96 ff_blockdsp_init(&s->bdsp, avctx);
97 ff_hpeldsp_init(&s->hdsp, avctx->flags);
98 ff_dsputil_init(&s->dsp, avctx);
99 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
103 s->first_picture = 1;
104 s->org_height = avctx->coded_height;
105 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
106 avctx->colorspace = AVCOL_SPC_BT470BG;
108 build_basic_mjpeg_vlc(s);
110 if (s->extern_huff) {
112 av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
113 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
114 if ((ret = ff_mjpeg_decode_dht(s))) {
115 av_log(avctx, AV_LOG_ERROR,
116 "mjpeg: error using external huffman table\n");
120 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
121 s->interlace_polarity = 1; /* bottom field first */
122 av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
124 if (avctx->codec->id == AV_CODEC_ID_AMV)
131 /* quantize tables */
132 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
134 int len, index, i, j;
136 len = get_bits(&s->gb, 16) - 2;
139 /* only 8 bit precision handled */
140 if (get_bits(&s->gb, 4) != 0) {
141 av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
144 index = get_bits(&s->gb, 4);
147 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
148 /* read quant table */
149 for (i = 0; i < 64; i++) {
150 j = s->scantable.permutated[i];
151 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
154 // XXX FIXME finetune, and perhaps add dc too
155 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
156 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
157 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
158 index, s->qscale[index]);
164 /* decode huffman tables and build VLC decoders */
165 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
167 int len, index, i, class, n, v, code_max;
168 uint8_t bits_table[17];
169 uint8_t val_table[256];
172 len = get_bits(&s->gb, 16) - 2;
176 return AVERROR_INVALIDDATA;
177 class = get_bits(&s->gb, 4);
179 return AVERROR_INVALIDDATA;
180 index = get_bits(&s->gb, 4);
182 return AVERROR_INVALIDDATA;
184 for (i = 1; i <= 16; i++) {
185 bits_table[i] = get_bits(&s->gb, 8);
189 if (len < n || n > 256)
190 return AVERROR_INVALIDDATA;
193 for (i = 0; i < n; i++) {
194 v = get_bits(&s->gb, 8);
201 /* build VLC and flush previous vlc if present */
202 ff_free_vlc(&s->vlcs[class][index]);
203 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
204 class, index, code_max + 1);
205 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
206 code_max + 1, 0, class > 0)) < 0)
210 ff_free_vlc(&s->vlcs[2][index]);
211 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
212 code_max + 1, 0, 0)) < 0)
219 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
221 int len, nb_components, i, width, height, pix_fmt_id, ret;
223 /* XXX: verify len field validity */
224 len = get_bits(&s->gb, 16);
225 s->bits = get_bits(&s->gb, 8);
229 if (s->bits == 9 && !s->pegasus_rct)
230 s->rct = 1; // FIXME ugly
232 if (s->bits != 8 && !s->lossless) {
233 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
237 height = get_bits(&s->gb, 16);
238 width = get_bits(&s->gb, 16);
240 // HACK for odd_height.mov
241 if (s->interlaced && s->width == width && s->height == height + 1)
244 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
245 if (av_image_check_size(width, height, 0, s->avctx))
246 return AVERROR_INVALIDDATA;
248 nb_components = get_bits(&s->gb, 8);
249 if (nb_components <= 0 ||
250 nb_components > MAX_COMPONENTS)
252 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
253 if (nb_components != s->nb_components) {
254 av_log(s->avctx, AV_LOG_ERROR,
255 "nb_components changing in interlaced picture\n");
256 return AVERROR_INVALIDDATA;
259 if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
260 avpriv_report_missing_feature(s->avctx,
261 "JPEG-LS that is not <= 8 "
262 "bits/component or 16-bit gray");
263 return AVERROR_PATCHWELCOME;
265 s->nb_components = nb_components;
268 for (i = 0; i < nb_components; i++) {
270 s->component_id[i] = get_bits(&s->gb, 8) - 1;
271 s->h_count[i] = get_bits(&s->gb, 4);
272 s->v_count[i] = get_bits(&s->gb, 4);
273 /* compute hmax and vmax (only used in interleaved case) */
274 if (s->h_count[i] > s->h_max)
275 s->h_max = s->h_count[i];
276 if (s->v_count[i] > s->v_max)
277 s->v_max = s->v_count[i];
278 s->quant_index[i] = get_bits(&s->gb, 8);
279 if (s->quant_index[i] >= 4)
280 return AVERROR_INVALIDDATA;
281 if (!s->h_count[i] || !s->v_count[i]) {
282 av_log(s->avctx, AV_LOG_ERROR,
283 "Invalid sampling factor in component %d %d:%d\n",
284 i, s->h_count[i], s->v_count[i]);
285 return AVERROR_INVALIDDATA;
288 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
289 i, s->h_count[i], s->v_count[i],
290 s->component_id[i], s->quant_index[i]);
293 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
294 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
295 return AVERROR_PATCHWELCOME;
298 if (s->v_max == 1 && s->h_max == 1 && s->lossless == 1)
301 /* if different size, realloc/alloc picture */
302 /* XXX: also check h_count and v_count */
303 if (width != s->width || height != s->height) {
308 /* test interlaced mode */
309 if (s->first_picture &&
310 s->org_height != 0 &&
311 s->height < ((s->org_height * 3) / 4)) {
313 s->bottom_field = s->interlace_polarity;
314 s->picture_ptr->interlaced_frame = 1;
315 s->picture_ptr->top_field_first = !s->interlace_polarity;
319 ret = ff_set_dimensions(s->avctx, width, height);
323 s->first_picture = 0;
326 if (!(s->interlaced && (s->bottom_field == !s->interlace_polarity))) {
327 /* XXX: not complete test ! */
328 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
329 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
330 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
331 (s->h_count[3] << 4) | s->v_count[3];
332 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
333 /* NOTE we do not allocate pictures large enough for the possible
334 * padding of h/v_count being 4 */
335 if (!(pix_fmt_id & 0xD0D0D0D0))
336 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
337 if (!(pix_fmt_id & 0x0D0D0D0D))
338 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
340 switch (pix_fmt_id) {
343 s->avctx->pix_fmt = AV_PIX_FMT_BGRA;
345 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
346 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
348 assert(s->nb_components == 3);
351 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
354 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
355 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
358 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
359 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
362 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
363 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
366 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
367 return AVERROR_PATCHWELCOME;
370 if (s->nb_components > 1)
371 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
372 else if (s->bits <= 8)
373 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
375 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
378 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
380 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
384 av_frame_unref(s->picture_ptr);
385 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0) {
386 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
389 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
390 s->picture_ptr->key_frame = 1;
393 for (i = 0; i < 3; i++)
394 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
396 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
397 s->width, s->height, s->linesize[0], s->linesize[1],
398 s->interlaced, s->avctx->height);
400 if (len != (8 + (3 * nb_components)))
401 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
404 /* totally blank picture as progressive JPEG will only add details to it */
405 if (s->progressive) {
406 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
407 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
408 for (i = 0; i < s->nb_components; i++) {
409 int size = bw * bh * s->h_count[i] * s->v_count[i];
410 av_freep(&s->blocks[i]);
411 av_freep(&s->last_nnz[i]);
412 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
413 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
414 s->block_stride[i] = bw * s->h_count[i];
416 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
421 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
424 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
426 av_log(s->avctx, AV_LOG_WARNING,
427 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
428 0, dc_index, &s->vlcs[0][dc_index]);
433 return get_xbits(&s->gb, code);
438 /* decode block and dequantize */
439 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
440 int dc_index, int ac_index, int16_t *quant_matrix)
442 int code, i, j, level, val;
445 val = mjpeg_decode_dc(s, dc_index);
447 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
448 return AVERROR_INVALIDDATA;
450 val = val * quant_matrix[0] + s->last_dc[component];
451 s->last_dc[component] = val;
455 {OPEN_READER(re, &s->gb);
457 UPDATE_CACHE(re, &s->gb);
458 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
460 i += ((unsigned)code) >> 4;
463 if (code > MIN_CACHE_BITS - 16)
464 UPDATE_CACHE(re, &s->gb);
467 int cache = GET_CACHE(re, &s->gb);
468 int sign = (~cache) >> 31;
469 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
472 LAST_SKIP_BITS(re, &s->gb, code);
475 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
476 return AVERROR_INVALIDDATA;
478 j = s->scantable.permutated[i];
479 block[j] = level * quant_matrix[j];
482 CLOSE_READER(re, &s->gb);}
487 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
488 int component, int dc_index,
489 int16_t *quant_matrix, int Al)
492 s->bdsp.clear_block(block);
493 val = mjpeg_decode_dc(s, dc_index);
495 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
496 return AVERROR_INVALIDDATA;
498 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
499 s->last_dc[component] = val;
504 /* decode block and dequantize - progressive JPEG version */
505 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
506 uint8_t *last_nnz, int ac_index,
507 int16_t *quant_matrix,
508 int ss, int se, int Al, int *EOBRUN)
510 int code, i, j, level, val, run;
518 OPEN_READER(re, &s->gb);
519 for (i = ss; ; i++) {
520 UPDATE_CACHE(re, &s->gb);
521 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
523 run = ((unsigned) code) >> 4;
527 if (code > MIN_CACHE_BITS - 16)
528 UPDATE_CACHE(re, &s->gb);
531 int cache = GET_CACHE(re, &s->gb);
532 int sign = (~cache) >> 31;
533 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
536 LAST_SKIP_BITS(re, &s->gb, code);
540 j = s->scantable.permutated[se];
541 block[j] = level * quant_matrix[j] << Al;
544 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
545 return AVERROR_INVALIDDATA;
547 j = s->scantable.permutated[i];
548 block[j] = level * quant_matrix[j] << Al;
550 if (run == 0xF) {// ZRL - skip 15 coefficients
553 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
554 return AVERROR_INVALIDDATA;
559 UPDATE_CACHE(re, &s->gb);
560 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
561 LAST_SKIP_BITS(re, &s->gb, run);
568 CLOSE_READER(re, &s->gb);
577 #define REFINE_BIT(j) { \
578 UPDATE_CACHE(re, &s->gb); \
579 sign = block[j] >> 15; \
580 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
581 ((quant_matrix[j] ^ sign) - sign) << Al; \
582 LAST_SKIP_BITS(re, &s->gb, 1); \
590 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
595 j = s->scantable.permutated[i]; \
598 else if (run-- == 0) \
602 /* decode block and dequantize - progressive JPEG refinement pass */
603 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
605 int ac_index, int16_t *quant_matrix,
606 int ss, int se, int Al, int *EOBRUN)
608 int code, i = ss, j, sign, val, run;
609 int last = FFMIN(se, *last_nnz);
611 OPEN_READER(re, &s->gb);
616 UPDATE_CACHE(re, &s->gb);
617 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
620 run = ((unsigned) code) >> 4;
621 UPDATE_CACHE(re, &s->gb);
622 val = SHOW_UBITS(re, &s->gb, 1);
623 LAST_SKIP_BITS(re, &s->gb, 1);
625 j = s->scantable.permutated[i];
627 block[j] = ((quant_matrix[j]^val) - val) << Al;
631 CLOSE_READER(re, &s->gb);
635 run = ((unsigned) code) >> 4;
642 UPDATE_CACHE(re, &s->gb);
643 run += SHOW_UBITS(re, &s->gb, val);
644 LAST_SKIP_BITS(re, &s->gb, val);
656 for (; i <= last; i++) {
657 j = s->scantable.permutated[i];
661 CLOSE_READER(re, &s->gb);
668 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor,
672 uint16_t (*buffer)[4];
673 int left[3], top[3], topleft[3];
674 const int linesize = s->linesize[0];
675 const int mask = (1 << s->bits) - 1;
677 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
678 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
679 buffer = s->ljpeg_buffer;
681 for (i = 0; i < 3; i++)
682 buffer[0][i] = 1 << (s->bits + point_transform - 1);
684 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
685 const int modified_predictor = mb_y ? predictor : 1;
686 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
688 if (s->interlaced && s->bottom_field)
689 ptr += linesize >> 1;
691 for (i = 0; i < 3; i++)
692 top[i] = left[i] = topleft[i] = buffer[0][i];
694 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
695 if (s->restart_interval && !s->restart_count)
696 s->restart_count = s->restart_interval;
698 for (i = 0; i < 3; i++) {
702 top[i] = buffer[mb_x][i];
704 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
706 left[i] = buffer[mb_x][i] =
707 mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
710 if (s->restart_interval && !--s->restart_count) {
711 align_get_bits(&s->gb);
712 skip_bits(&s->gb, 16); /* skip RSTn */
717 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
718 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
719 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
720 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
722 } else if (s->pegasus_rct) {
723 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
724 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
725 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
726 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
729 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
730 ptr[4 * mb_x + 0] = buffer[mb_x][2];
731 ptr[4 * mb_x + 1] = buffer[mb_x][1];
732 ptr[4 * mb_x + 2] = buffer[mb_x][0];
739 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
740 int point_transform, int nb_components)
744 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
745 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
746 if (s->restart_interval && !s->restart_count)
747 s->restart_count = s->restart_interval;
749 if (mb_x == 0 || mb_y == 0 || s->interlaced) {
750 for (i = 0; i < nb_components; i++) {
752 int n, h, v, x, y, c, j, linesize;
754 c = s->comp_index[i];
759 linesize = s->linesize[c];
761 for (j = 0; j < n; j++) {
763 // FIXME optimize this crap
764 ptr = s->picture_ptr->data[c] +
765 (linesize * (v * mb_y + y)) +
767 if (y == 0 && mb_y == 0) {
768 if (x == 0 && mb_x == 0)
769 pred = 128 << point_transform;
773 if (x == 0 && mb_x == 0)
774 pred = ptr[-linesize];
776 PREDICT(pred, ptr[-linesize - 1],
777 ptr[-linesize], ptr[-1], predictor);
780 if (s->interlaced && s->bottom_field)
781 ptr += linesize >> 1;
782 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
791 for (i = 0; i < nb_components; i++) {
793 int n, h, v, x, y, c, j, linesize;
795 c = s->comp_index[i];
800 linesize = s->linesize[c];
802 for (j = 0; j < n; j++) {
805 // FIXME optimize this crap
806 ptr = s->picture_ptr->data[c] +
807 (linesize * (v * mb_y + y)) +
809 PREDICT(pred, ptr[-linesize - 1],
810 ptr[-linesize], ptr[-1], predictor);
811 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
819 if (s->restart_interval && !--s->restart_count) {
820 align_get_bits(&s->gb);
821 skip_bits(&s->gb, 16); /* skip RSTn */
828 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
829 int Al, const uint8_t *mb_bitmask,
830 const AVFrame *reference)
833 uint8_t *data[MAX_COMPONENTS];
834 const uint8_t *reference_data[MAX_COMPONENTS];
835 int linesize[MAX_COMPONENTS];
836 GetBitContext mb_bitmask_gb;
839 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
841 for (i = 0; i < nb_components; i++) {
842 int c = s->comp_index[i];
843 data[c] = s->picture_ptr->data[c];
844 reference_data[c] = reference ? reference->data[c] : NULL;
845 linesize[c] = s->linesize[c];
846 s->coefs_finished[c] |= 1;
849 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
850 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
851 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
853 if (s->restart_interval && !s->restart_count)
854 s->restart_count = s->restart_interval;
856 if (get_bits_left(&s->gb) < 0) {
857 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
858 -get_bits_left(&s->gb));
859 return AVERROR_INVALIDDATA;
861 for (i = 0; i < nb_components; i++) {
863 int n, h, v, x, y, c, j;
866 c = s->comp_index[i];
871 for (j = 0; j < n; j++) {
872 block_offset = ((linesize[c] * (v * mb_y + y) * 8) +
875 if (s->interlaced && s->bottom_field)
876 block_offset += linesize[c] >> 1;
877 ptr = data[c] + block_offset;
878 if (!s->progressive) {
880 s->hdsp.put_pixels_tab[1][0](ptr,
881 reference_data[c] + block_offset,
884 s->bdsp.clear_block(s->block);
885 if (decode_block(s, s->block, i,
886 s->dc_index[i], s->ac_index[i],
887 s->quant_matrixes[s->quant_index[c]]) < 0) {
888 av_log(s->avctx, AV_LOG_ERROR,
889 "error y=%d x=%d\n", mb_y, mb_x);
890 return AVERROR_INVALIDDATA;
892 s->dsp.idct_put(ptr, linesize[c], s->block);
895 int block_idx = s->block_stride[c] * (v * mb_y + y) +
897 int16_t *block = s->blocks[c][block_idx];
899 block[0] += get_bits1(&s->gb) *
900 s->quant_matrixes[s->quant_index[c]][0] << Al;
901 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
902 s->quant_matrixes[s->quant_index[c]],
904 av_log(s->avctx, AV_LOG_ERROR,
905 "error y=%d x=%d\n", mb_y, mb_x);
906 return AVERROR_INVALIDDATA;
909 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
910 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
911 mb_x, mb_y, x, y, c, s->bottom_field,
912 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
920 if (s->restart_interval) {
922 i = 8 + ((-get_bits_count(&s->gb)) & 7);
924 if (show_bits(&s->gb, i) == (1 << i) - 1) {
925 int pos = get_bits_count(&s->gb);
926 align_get_bits(&s->gb);
927 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
928 skip_bits(&s->gb, 8);
929 if ((get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
930 for (i = 0; i < nb_components; i++) /* reset dc */
931 s->last_dc[i] = 1024;
933 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
941 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
942 int se, int Ah, int Al,
943 const uint8_t *mb_bitmask,
944 const AVFrame *reference)
948 int c = s->comp_index[0];
949 uint8_t *data = s->picture_ptr->data[c];
950 const uint8_t *reference_data = reference ? reference->data[c] : NULL;
951 int linesize = s->linesize[c];
953 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
954 GetBitContext mb_bitmask_gb;
956 if (ss < 0 || ss >= 64 ||
957 se < ss || se >= 64 ||
959 return AVERROR_INVALIDDATA;
962 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
965 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
966 last_scan = !~s->coefs_finished[c];
969 if (s->interlaced && s->bottom_field) {
970 int offset = linesize >> 1;
972 reference_data += offset;
975 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
976 int block_offset = mb_y * linesize * 8;
977 uint8_t *ptr = data + block_offset;
978 int block_idx = mb_y * s->block_stride[c];
979 int16_t (*block)[64] = &s->blocks[c][block_idx];
980 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
981 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
982 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
987 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
988 quant_matrix, ss, se, Al, &EOBRUN);
990 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
991 quant_matrix, ss, se, Al, &EOBRUN);
993 av_log(s->avctx, AV_LOG_ERROR,
994 "error y=%d x=%d\n", mb_y, mb_x);
995 return AVERROR_INVALIDDATA;
1001 s->hdsp.put_pixels_tab[1][0](ptr,
1002 reference_data + block_offset,
1005 s->dsp.idct_put(ptr, linesize, *block);
1014 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1015 const AVFrame *reference)
1017 int len, nb_components, i, h, v, predictor, point_transform;
1019 const int block_size = s->lossless ? 1 : 8;
1020 int ilv, prev_shift;
1022 /* XXX: verify len field validity */
1023 len = get_bits(&s->gb, 16);
1024 nb_components = get_bits(&s->gb, 8);
1025 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1026 av_log(s->avctx, AV_LOG_ERROR,
1027 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1028 return AVERROR_PATCHWELCOME;
1030 if (len != 6 + 2 * nb_components) {
1031 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1032 return AVERROR_INVALIDDATA;
1034 for (i = 0; i < nb_components; i++) {
1035 id = get_bits(&s->gb, 8) - 1;
1036 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1037 /* find component index */
1038 for (index = 0; index < s->nb_components; index++)
1039 if (id == s->component_id[index])
1041 if (index == s->nb_components) {
1042 av_log(s->avctx, AV_LOG_ERROR,
1043 "decode_sos: index(%d) out of components\n", index);
1044 return AVERROR_INVALIDDATA;
1046 /* Metasoft MJPEG codec has Cb and Cr swapped */
1047 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1048 && nb_components == 3 && s->nb_components == 3 && i)
1051 s->comp_index[i] = index;
1053 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1054 s->h_scount[i] = s->h_count[index];
1055 s->v_scount[i] = s->v_count[index];
1057 s->dc_index[i] = get_bits(&s->gb, 4);
1058 s->ac_index[i] = get_bits(&s->gb, 4);
1060 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1061 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1063 if (!s->vlcs[0][s->dc_index[i]].table ||
1064 !s->vlcs[1][s->ac_index[i]].table)
1068 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1069 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1070 prev_shift = get_bits(&s->gb, 4); /* Ah */
1071 point_transform = get_bits(&s->gb, 4); /* Al */
1073 if (nb_components > 1) {
1074 /* interleaved stream */
1075 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1076 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1077 } else if (!s->ls) { /* skip this for JPEG-LS */
1078 h = s->h_max / s->h_scount[0];
1079 v = s->v_max / s->v_scount[0];
1080 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1081 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1082 s->nb_blocks[0] = 1;
1087 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1088 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n",
1089 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1090 predictor, point_transform, ilv, s->bits,
1091 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
1094 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1095 for (i = s->mjpb_skiptosod; i > 0; i--)
1096 skip_bits(&s->gb, 8);
1099 for (i = 0; i < nb_components; i++)
1100 s->last_dc[i] = 1024;
1103 if (CONFIG_JPEGLS_DECODER && s->ls) {
1105 // reset_ls_coding_parameters(s, 0);
1107 if ((ret = ff_jpegls_decode_picture(s, predictor,
1108 point_transform, ilv)) < 0)
1112 if ((ret = ljpeg_decode_rgb_scan(s, predictor,
1113 point_transform)) < 0)
1116 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1118 nb_components)) < 0)
1123 if (s->progressive && predictor) {
1124 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1131 if ((ret = mjpeg_decode_scan(s, nb_components,
1132 prev_shift, point_transform,
1133 mb_bitmask, reference)) < 0)
1138 if (s->interlaced &&
1139 get_bits_left(&s->gb) > 32 &&
1140 show_bits(&s->gb, 8) == 0xFF) {
1141 GetBitContext bak = s->gb;
1142 align_get_bits(&bak);
1143 if (show_bits(&bak, 16) == 0xFFD1) {
1144 av_dlog(s->avctx, "AVRn interlaced picture marker found\n");
1146 skip_bits(&s->gb, 16);
1147 s->bottom_field ^= 1;
1156 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1157 return AVERROR_INVALIDDATA;
1160 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1162 if (get_bits(&s->gb, 16) != 4)
1163 return AVERROR_INVALIDDATA;
1164 s->restart_interval = get_bits(&s->gb, 16);
1165 s->restart_count = 0;
1166 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1167 s->restart_interval);
1172 static int mjpeg_decode_app(MJpegDecodeContext *s)
1176 len = get_bits(&s->gb, 16);
1178 return AVERROR_INVALIDDATA;
1179 if (8 * len > get_bits_left(&s->gb))
1180 return AVERROR_INVALIDDATA;
1182 id = get_bits_long(&s->gb, 32);
1183 id = av_be2ne32(id);
1186 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1187 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1189 /* Buggy AVID, it puts EOI only at every 10th frame. */
1190 /* Also, this fourcc is used by non-avid files too, it holds some
1191 information, but it's always present in AVID-created files. */
1192 if (id == AV_RL32("AVI1")) {
1198 4bytes field_size_less_padding
1201 i = get_bits(&s->gb, 8);
1203 s->bottom_field = 1;
1205 s->bottom_field = 0;
1207 skip_bits(&s->gb, 8);
1208 skip_bits(&s->gb, 32);
1209 skip_bits(&s->gb, 32);
1217 if (id == AV_RL32("JFIF")) {
1218 int t_w, t_h, v1, v2;
1219 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1220 v1 = get_bits(&s->gb, 8);
1221 v2 = get_bits(&s->gb, 8);
1222 skip_bits(&s->gb, 8);
1224 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1225 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1226 ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
1228 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1229 av_log(s->avctx, AV_LOG_INFO,
1230 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1232 s->avctx->sample_aspect_ratio.num,
1233 s->avctx->sample_aspect_ratio.den);
1235 t_w = get_bits(&s->gb, 8);
1236 t_h = get_bits(&s->gb, 8);
1238 /* skip thumbnail */
1239 if (len -10 - (t_w * t_h * 3) > 0)
1240 len -= t_w * t_h * 3;
1246 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1247 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1248 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1249 skip_bits(&s->gb, 16); /* version */
1250 skip_bits(&s->gb, 16); /* flags0 */
1251 skip_bits(&s->gb, 16); /* flags1 */
1252 skip_bits(&s->gb, 8); /* transform */
1257 if (id == AV_RL32("LJIF")) {
1258 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1259 av_log(s->avctx, AV_LOG_INFO,
1260 "Pegasus lossless jpeg header found\n");
1261 skip_bits(&s->gb, 16); /* version ? */
1262 skip_bits(&s->gb, 16); /* unknwon always 0? */
1263 skip_bits(&s->gb, 16); /* unknwon always 0? */
1264 skip_bits(&s->gb, 16); /* unknwon always 0? */
1265 switch (get_bits(&s->gb, 8)) {
1275 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1282 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1283 id = get_bits_long(&s->gb, 32);
1284 id = av_be2ne32(id);
1287 if (id == AV_RL32("mjpg")) {
1289 skip_bits(&s->gb, 32); /* field size */
1290 skip_bits(&s->gb, 32); /* pad field size */
1291 skip_bits(&s->gb, 32); /* next off */
1292 skip_bits(&s->gb, 32); /* quant off */
1293 skip_bits(&s->gb, 32); /* huff off */
1294 skip_bits(&s->gb, 32); /* image off */
1295 skip_bits(&s->gb, 32); /* scan off */
1296 skip_bits(&s->gb, 32); /* data off */
1298 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1299 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1304 /* slow but needed for extreme adobe jpegs */
1306 av_log(s->avctx, AV_LOG_ERROR,
1307 "mjpeg: error, decode_app parser read over the end\n");
1309 skip_bits(&s->gb, 8);
1314 static int mjpeg_decode_com(MJpegDecodeContext *s)
1316 int len = get_bits(&s->gb, 16);
1317 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1318 char *cbuf = av_malloc(len - 1);
1321 for (i = 0; i < len - 2; i++)
1322 cbuf[i] = get_bits(&s->gb, 8);
1323 if (i > 0 && cbuf[i - 1] == '\n')
1328 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1329 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1331 /* buggy avid, it puts EOI only at every 10th frame */
1332 if (!strcmp(cbuf, "AVID")) {
1334 } else if (!strcmp(cbuf, "CS=ITU601"))
1336 else if ((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
1337 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1347 /* return the 8 bit start code value and update the search
1348 state. Return -1 if no start code found */
1349 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1351 const uint8_t *buf_ptr;
1358 buf_ptr = *pbuf_ptr;
1359 while (buf_ptr < buf_end) {
1362 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1372 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1373 *pbuf_ptr = buf_ptr;
1377 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1378 const uint8_t **buf_ptr, const uint8_t *buf_end,
1379 const uint8_t **unescaped_buf_ptr,
1380 int *unescaped_buf_size)
1383 start_code = find_marker(buf_ptr, buf_end);
1385 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1387 return AVERROR(ENOMEM);
1389 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1390 if (start_code == SOS && !s->ls) {
1391 const uint8_t *src = *buf_ptr;
1392 uint8_t *dst = s->buffer;
1394 while (src < buf_end) {
1395 uint8_t x = *(src++);
1398 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1400 while (src < buf_end && x == 0xff)
1403 if (x >= 0xd0 && x <= 0xd7)
1410 *unescaped_buf_ptr = s->buffer;
1411 *unescaped_buf_size = dst - s->buffer;
1412 memset(s->buffer + *unescaped_buf_size, 0,
1413 FF_INPUT_BUFFER_PADDING_SIZE);
1415 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1416 (buf_end - *buf_ptr) - (dst - s->buffer));
1417 } else if (start_code == SOS && s->ls) {
1418 const uint8_t *src = *buf_ptr;
1419 uint8_t *dst = s->buffer;
1427 while (src + t < buf_end) {
1428 uint8_t x = src[t++];
1430 while ((src + t < buf_end) && x == 0xff)
1439 init_put_bits(&pb, dst, t);
1441 /* unescape bitstream */
1443 uint8_t x = src[b++];
1444 put_bits(&pb, 8, x);
1447 put_bits(&pb, 7, x);
1451 flush_put_bits(&pb);
1453 *unescaped_buf_ptr = dst;
1454 *unescaped_buf_size = (bit_count + 7) >> 3;
1455 memset(s->buffer + *unescaped_buf_size, 0,
1456 FF_INPUT_BUFFER_PADDING_SIZE);
1458 *unescaped_buf_ptr = *buf_ptr;
1459 *unescaped_buf_size = buf_end - *buf_ptr;
1465 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1468 AVFrame *frame = data;
1469 const uint8_t *buf = avpkt->data;
1470 int buf_size = avpkt->size;
1471 MJpegDecodeContext *s = avctx->priv_data;
1472 const uint8_t *buf_end, *buf_ptr;
1473 const uint8_t *unescaped_buf_ptr;
1474 int unescaped_buf_size;
1478 s->got_picture = 0; // picture from previous image can not be reused
1480 buf_end = buf + buf_size;
1481 while (buf_ptr < buf_end) {
1482 /* find start next marker */
1483 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1485 &unescaped_buf_size);
1487 if (start_code < 0) {
1489 } else if (unescaped_buf_size > INT_MAX / 8) {
1490 av_log(avctx, AV_LOG_ERROR,
1491 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1492 start_code, unescaped_buf_size, buf_size);
1493 return AVERROR_INVALIDDATA;
1496 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1497 start_code, buf_end - buf_ptr);
1499 ret = init_get_bits(&s->gb, unescaped_buf_ptr,
1500 unescaped_buf_size * 8);
1504 s->start_code = start_code;
1505 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1506 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1508 /* process markers */
1509 if (start_code >= 0xd0 && start_code <= 0xd7)
1510 av_log(avctx, AV_LOG_DEBUG,
1511 "restart marker: %d\n", start_code & 0x0f);
1513 else if (start_code >= APP0 && start_code <= APP15)
1514 mjpeg_decode_app(s);
1516 else if (start_code == COM)
1517 mjpeg_decode_com(s);
1519 if (!CONFIG_JPEGLS_DECODER &&
1520 (start_code == SOF48 || start_code == LSE)) {
1521 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
1522 return AVERROR(ENOSYS);
1525 switch (start_code) {
1527 s->restart_interval = 0;
1528 s->restart_count = 0;
1529 /* nothing to do on SOI */
1532 ff_mjpeg_decode_dqt(s);
1535 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1536 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1545 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1552 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1559 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1566 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1570 if (!CONFIG_JPEGLS_DECODER ||
1571 (ret = ff_jpegls_decode_lse(s)) < 0)
1576 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1579 if (!s->got_picture) {
1580 av_log(avctx, AV_LOG_WARNING,
1581 "Found EOI before any SOF, ignoring\n");
1584 if (s->interlaced) {
1585 s->bottom_field ^= 1;
1586 /* if not bottom field, do not output image yet */
1587 if (s->bottom_field == !s->interlace_polarity)
1590 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
1594 for (i = 0; frame->data[i]; i++) {
1595 int h = frame->height >> ((i == 1 || i == 2) ?
1596 s->pix_desc->log2_chroma_h : 0);
1597 frame->data[i] += frame->linesize[i] * (h - 1);
1598 frame->linesize[i] *= -1;
1604 avctx->debug & FF_DEBUG_QP) {
1605 av_log(avctx, AV_LOG_DEBUG,
1606 "QP: %d\n", FFMAX3(s->qscale[0],
1613 if (!s->got_picture) {
1614 av_log(avctx, AV_LOG_WARNING,
1615 "Can not process SOS before SOF, skipping\n");
1618 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1619 (avctx->err_recognition & AV_EF_EXPLODE))
1621 /* buggy avid puts EOI every 10-20th frame */
1622 /* if restart period is over process EOI */
1623 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1627 mjpeg_decode_dri(s);
1639 av_log(avctx, AV_LOG_ERROR,
1640 "mjpeg: unsupported coding type (%x)\n", start_code);
1645 /* eof process start code */
1646 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1647 av_log(avctx, AV_LOG_DEBUG,
1648 "marker parser used %d bytes (%d bits)\n",
1649 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1651 if (s->got_picture) {
1652 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1655 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1656 return AVERROR_INVALIDDATA;
1658 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n",
1660 // return buf_end - buf_ptr;
1661 return buf_ptr - buf;
1664 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1666 MJpegDecodeContext *s = avctx->priv_data;
1670 av_frame_free(&s->picture);
1671 s->picture_ptr = NULL;
1672 } else if (s->picture_ptr)
1673 av_frame_unref(s->picture_ptr);
1676 av_freep(&s->ljpeg_buffer);
1677 s->ljpeg_buffer_size = 0;
1679 for (i = 0; i < 3; i++) {
1680 for (j = 0; j < 4; j++)
1681 ff_free_vlc(&s->vlcs[i][j]);
1683 for (i = 0; i < MAX_COMPONENTS; i++) {
1684 av_freep(&s->blocks[i]);
1685 av_freep(&s->last_nnz[i]);
1690 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1691 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1692 static const AVOption options[] = {
1693 { "extern_huff", "Use external huffman table.",
1694 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
1698 static const AVClass mjpegdec_class = {
1699 .class_name = "MJPEG decoder",
1700 .item_name = av_default_item_name,
1702 .version = LIBAVUTIL_VERSION_INT,
1705 AVCodec ff_mjpeg_decoder = {
1707 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1708 .type = AVMEDIA_TYPE_VIDEO,
1709 .id = AV_CODEC_ID_MJPEG,
1710 .priv_data_size = sizeof(MJpegDecodeContext),
1711 .init = ff_mjpeg_decode_init,
1712 .close = ff_mjpeg_decode_end,
1713 .decode = ff_mjpeg_decode_frame,
1714 .capabilities = CODEC_CAP_DR1,
1715 .priv_class = &mjpegdec_class,
1718 AVCodec ff_thp_decoder = {
1720 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
1721 .type = AVMEDIA_TYPE_VIDEO,
1722 .id = AV_CODEC_ID_THP,
1723 .priv_data_size = sizeof(MJpegDecodeContext),
1724 .init = ff_mjpeg_decode_init,
1725 .close = ff_mjpeg_decode_end,
1726 .decode = ff_mjpeg_decode_frame,
1727 .capabilities = CODEC_CAP_DR1,