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"
41 #include "jpegtables.h"
44 #include "jpeglsdec.h"
48 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
49 const uint8_t *val_table, int nb_codes,
50 int use_static, int is_ac)
52 uint8_t huff_size[256] = { 0 };
53 uint16_t huff_code[256];
54 uint16_t huff_sym[256];
57 assert(nb_codes <= 256);
59 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
61 for (i = 0; i < 256; i++)
62 huff_sym[i] = i + 16 * is_ac;
65 huff_sym[0] = 16 * 256;
67 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
68 huff_code, 2, 2, huff_sym, 2, 2, use_static);
71 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
73 build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
74 avpriv_mjpeg_val_dc, 12, 0, 0);
75 build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
76 avpriv_mjpeg_val_dc, 12, 0, 0);
77 build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
78 avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
79 build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
80 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
81 build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
82 avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
83 build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
84 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
87 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
89 MJpegDecodeContext *s = avctx->priv_data;
91 if (!s->picture_ptr) {
92 s->picture = av_frame_alloc();
94 return AVERROR(ENOMEM);
95 s->picture_ptr = s->picture;
99 ff_blockdsp_init(&s->bdsp, avctx);
100 ff_hpeldsp_init(&s->hdsp, avctx->flags);
101 ff_idctdsp_init(&s->idsp, avctx);
102 ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
107 s->first_picture = 1;
108 s->org_height = avctx->coded_height;
109 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
110 avctx->colorspace = AVCOL_SPC_BT470BG;
112 build_basic_mjpeg_vlc(s);
114 if (s->extern_huff) {
116 av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
117 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
118 if ((ret = ff_mjpeg_decode_dht(s))) {
119 av_log(avctx, AV_LOG_ERROR,
120 "mjpeg: error using external huffman table\n");
124 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
125 s->interlace_polarity = 1; /* bottom field first */
126 av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
128 if (avctx->codec->id == AV_CODEC_ID_AMV)
135 /* quantize tables */
136 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
138 int len, index, i, j;
140 len = get_bits(&s->gb, 16) - 2;
143 /* only 8 bit precision handled */
144 if (get_bits(&s->gb, 4) != 0) {
145 av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
148 index = get_bits(&s->gb, 4);
151 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
152 /* read quant table */
153 for (i = 0; i < 64; i++) {
154 j = s->scantable.permutated[i];
155 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
158 // XXX FIXME finetune, and perhaps add dc too
159 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
160 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
161 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
162 index, s->qscale[index]);
168 /* decode huffman tables and build VLC decoders */
169 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
171 int len, index, i, class, n, v, code_max;
172 uint8_t bits_table[17];
173 uint8_t val_table[256];
176 len = get_bits(&s->gb, 16) - 2;
180 return AVERROR_INVALIDDATA;
181 class = get_bits(&s->gb, 4);
183 return AVERROR_INVALIDDATA;
184 index = get_bits(&s->gb, 4);
186 return AVERROR_INVALIDDATA;
188 for (i = 1; i <= 16; i++) {
189 bits_table[i] = get_bits(&s->gb, 8);
193 if (len < n || n > 256)
194 return AVERROR_INVALIDDATA;
197 for (i = 0; i < n; i++) {
198 v = get_bits(&s->gb, 8);
205 /* build VLC and flush previous vlc if present */
206 ff_free_vlc(&s->vlcs[class][index]);
207 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
208 class, index, code_max + 1);
209 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
210 code_max + 1, 0, class > 0)) < 0)
214 ff_free_vlc(&s->vlcs[2][index]);
215 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
216 code_max + 1, 0, 0)) < 0)
223 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
225 int h_count[MAX_COMPONENTS] = { 0 };
226 int v_count[MAX_COMPONENTS] = { 0 };
227 int len, nb_components, i, width, height, bits, pix_fmt_id, ret;
229 /* XXX: verify len field validity */
230 len = get_bits(&s->gb, 16);
231 bits = get_bits(&s->gb, 8);
235 if (bits == 9 && !s->pegasus_rct)
236 s->rct = 1; // FIXME ugly
238 if (bits != 8 && !s->lossless) {
239 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
243 height = get_bits(&s->gb, 16);
244 width = get_bits(&s->gb, 16);
246 // HACK for odd_height.mov
247 if (s->interlaced && s->width == width && s->height == height + 1)
250 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
251 if (av_image_check_size(width, height, 0, s->avctx))
252 return AVERROR_INVALIDDATA;
254 nb_components = get_bits(&s->gb, 8);
255 if (nb_components <= 0 ||
256 nb_components > MAX_COMPONENTS)
258 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
259 if (nb_components != s->nb_components) {
260 av_log(s->avctx, AV_LOG_ERROR,
261 "nb_components changing in interlaced picture\n");
262 return AVERROR_INVALIDDATA;
265 if (s->ls && !(bits <= 8 || nb_components == 1)) {
266 avpriv_report_missing_feature(s->avctx,
267 "JPEG-LS that is not <= 8 "
268 "bits/component or 16-bit gray");
269 return AVERROR_PATCHWELCOME;
271 s->nb_components = nb_components;
274 for (i = 0; i < nb_components; i++) {
276 s->component_id[i] = get_bits(&s->gb, 8) - 1;
277 h_count[i] = get_bits(&s->gb, 4);
278 v_count[i] = get_bits(&s->gb, 4);
279 /* compute hmax and vmax (only used in interleaved case) */
280 if (h_count[i] > s->h_max)
281 s->h_max = h_count[i];
282 if (v_count[i] > s->v_max)
283 s->v_max = v_count[i];
284 s->quant_index[i] = get_bits(&s->gb, 8);
285 if (s->quant_index[i] >= 4)
286 return AVERROR_INVALIDDATA;
287 if (!h_count[i] || !v_count[i]) {
288 av_log(s->avctx, AV_LOG_ERROR,
289 "Invalid sampling factor in component %d %d:%d\n",
290 i, h_count[i], v_count[i]);
291 return AVERROR_INVALIDDATA;
294 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
295 i, h_count[i], v_count[i],
296 s->component_id[i], s->quant_index[i]);
299 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
300 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
301 return AVERROR_PATCHWELCOME;
304 if (s->v_max == 1 && s->h_max == 1 && s->lossless == 1)
307 /* if different size, realloc/alloc picture */
308 if (width != s->width || height != s->height || bits != s->bits ||
309 memcmp(s->h_count, h_count, sizeof(h_count)) ||
310 memcmp(s->v_count, v_count, sizeof(v_count))) {
314 memcpy(s->h_count, h_count, sizeof(h_count));
315 memcpy(s->v_count, v_count, sizeof(v_count));
318 /* test interlaced mode */
319 if (s->first_picture &&
320 s->org_height != 0 &&
321 s->height < ((s->org_height * 3) / 4)) {
323 s->bottom_field = s->interlace_polarity;
324 s->picture_ptr->interlaced_frame = 1;
325 s->picture_ptr->top_field_first = !s->interlace_polarity;
329 ret = ff_set_dimensions(s->avctx, width, height);
333 s->first_picture = 0;
336 if (!(s->interlaced && (s->bottom_field == !s->interlace_polarity))) {
337 /* XXX: not complete test ! */
338 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
339 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
340 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
341 (s->h_count[3] << 4) | s->v_count[3];
342 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
343 /* NOTE we do not allocate pictures large enough for the possible
344 * padding of h/v_count being 4 */
345 if (!(pix_fmt_id & 0xD0D0D0D0))
346 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
347 if (!(pix_fmt_id & 0x0D0D0D0D))
348 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
350 switch (pix_fmt_id) {
353 s->avctx->pix_fmt = AV_PIX_FMT_BGRA;
355 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
356 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
358 assert(s->nb_components == 3);
361 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
364 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
365 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
368 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
369 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
372 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
373 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
376 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
377 return AVERROR_PATCHWELCOME;
380 if (s->nb_components > 1)
381 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
382 else if (s->bits <= 8)
383 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
385 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
388 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
390 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
394 av_frame_unref(s->picture_ptr);
395 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0) {
396 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
399 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
400 s->picture_ptr->key_frame = 1;
403 for (i = 0; i < 3; i++)
404 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
406 ff_dlog(s->avctx, "%d %d %d %d %d %d\n",
407 s->width, s->height, s->linesize[0], s->linesize[1],
408 s->interlaced, s->avctx->height);
410 if (len != (8 + (3 * nb_components)))
411 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
414 /* totally blank picture as progressive JPEG will only add details to it */
415 if (s->progressive) {
416 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
417 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
418 for (i = 0; i < s->nb_components; i++) {
419 int size = bw * bh * s->h_count[i] * s->v_count[i];
420 av_freep(&s->blocks[i]);
421 av_freep(&s->last_nnz[i]);
422 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
423 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
424 s->block_stride[i] = bw * s->h_count[i];
426 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
431 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
434 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
436 av_log(s->avctx, AV_LOG_WARNING,
437 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
438 0, dc_index, &s->vlcs[0][dc_index]);
443 return get_xbits(&s->gb, code);
448 /* decode block and dequantize */
449 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
450 int dc_index, int ac_index, int16_t *quant_matrix)
452 int code, i, j, level, val;
455 val = mjpeg_decode_dc(s, dc_index);
457 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
458 return AVERROR_INVALIDDATA;
460 val = val * quant_matrix[0] + s->last_dc[component];
461 s->last_dc[component] = val;
465 {OPEN_READER(re, &s->gb);
467 UPDATE_CACHE(re, &s->gb);
468 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
470 i += ((unsigned)code) >> 4;
473 if (code > MIN_CACHE_BITS - 16)
474 UPDATE_CACHE(re, &s->gb);
477 int cache = GET_CACHE(re, &s->gb);
478 int sign = (~cache) >> 31;
479 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
482 LAST_SKIP_BITS(re, &s->gb, code);
485 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
486 return AVERROR_INVALIDDATA;
488 j = s->scantable.permutated[i];
489 block[j] = level * quant_matrix[j];
492 CLOSE_READER(re, &s->gb);}
497 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
498 int component, int dc_index,
499 int16_t *quant_matrix, int Al)
502 s->bdsp.clear_block(block);
503 val = mjpeg_decode_dc(s, dc_index);
505 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
506 return AVERROR_INVALIDDATA;
508 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
509 s->last_dc[component] = val;
514 /* decode block and dequantize - progressive JPEG version */
515 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
516 uint8_t *last_nnz, int ac_index,
517 int16_t *quant_matrix,
518 int ss, int se, int Al, int *EOBRUN)
520 int code, i, j, level, val, run;
528 OPEN_READER(re, &s->gb);
529 for (i = ss; ; i++) {
530 UPDATE_CACHE(re, &s->gb);
531 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
533 run = ((unsigned) code) >> 4;
537 if (code > MIN_CACHE_BITS - 16)
538 UPDATE_CACHE(re, &s->gb);
541 int cache = GET_CACHE(re, &s->gb);
542 int sign = (~cache) >> 31;
543 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
546 LAST_SKIP_BITS(re, &s->gb, code);
550 j = s->scantable.permutated[se];
551 block[j] = level * quant_matrix[j] << Al;
554 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
555 return AVERROR_INVALIDDATA;
557 j = s->scantable.permutated[i];
558 block[j] = level * quant_matrix[j] << Al;
560 if (run == 0xF) {// ZRL - skip 15 coefficients
563 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
564 return AVERROR_INVALIDDATA;
569 UPDATE_CACHE(re, &s->gb);
570 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
571 LAST_SKIP_BITS(re, &s->gb, run);
578 CLOSE_READER(re, &s->gb);
587 #define REFINE_BIT(j) { \
588 UPDATE_CACHE(re, &s->gb); \
589 sign = block[j] >> 15; \
590 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
591 ((quant_matrix[j] ^ sign) - sign) << Al; \
592 LAST_SKIP_BITS(re, &s->gb, 1); \
600 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
605 j = s->scantable.permutated[i]; \
608 else if (run-- == 0) \
612 /* decode block and dequantize - progressive JPEG refinement pass */
613 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
615 int ac_index, int16_t *quant_matrix,
616 int ss, int se, int Al, int *EOBRUN)
618 int code, i = ss, j, sign, val, run;
619 int last = FFMIN(se, *last_nnz);
621 OPEN_READER(re, &s->gb);
626 UPDATE_CACHE(re, &s->gb);
627 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
630 run = ((unsigned) code) >> 4;
631 UPDATE_CACHE(re, &s->gb);
632 val = SHOW_UBITS(re, &s->gb, 1);
633 LAST_SKIP_BITS(re, &s->gb, 1);
635 j = s->scantable.permutated[i];
637 block[j] = ((quant_matrix[j]^val) - val) << Al;
641 CLOSE_READER(re, &s->gb);
645 run = ((unsigned) code) >> 4;
652 UPDATE_CACHE(re, &s->gb);
653 run += SHOW_UBITS(re, &s->gb, val);
654 LAST_SKIP_BITS(re, &s->gb, val);
666 for (; i <= last; i++) {
667 j = s->scantable.permutated[i];
671 CLOSE_READER(re, &s->gb);
678 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor,
682 uint16_t (*buffer)[4];
683 int left[3], top[3], topleft[3];
684 const int linesize = s->linesize[0];
685 const int mask = (1 << s->bits) - 1;
687 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
688 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
689 buffer = s->ljpeg_buffer;
691 for (i = 0; i < 3; i++)
692 buffer[0][i] = 1 << (s->bits + point_transform - 1);
694 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
695 const int modified_predictor = mb_y ? predictor : 1;
696 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
698 if (s->interlaced && s->bottom_field)
699 ptr += linesize >> 1;
701 for (i = 0; i < 3; i++)
702 top[i] = left[i] = topleft[i] = buffer[0][i];
704 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
705 if (s->restart_interval && !s->restart_count)
706 s->restart_count = s->restart_interval;
708 for (i = 0; i < 3; i++) {
712 top[i] = buffer[mb_x][i];
714 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
716 left[i] = buffer[mb_x][i] =
717 mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
720 if (s->restart_interval && !--s->restart_count) {
721 align_get_bits(&s->gb);
722 skip_bits(&s->gb, 16); /* skip RSTn */
727 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
728 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
729 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
730 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
732 } else if (s->pegasus_rct) {
733 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
734 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
735 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
736 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
739 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
740 ptr[4 * mb_x + 0] = buffer[mb_x][2];
741 ptr[4 * mb_x + 1] = buffer[mb_x][1];
742 ptr[4 * mb_x + 2] = buffer[mb_x][0];
749 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
750 int point_transform, int nb_components)
754 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
755 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
756 if (s->restart_interval && !s->restart_count)
757 s->restart_count = s->restart_interval;
759 if (mb_x == 0 || mb_y == 0 || s->interlaced) {
760 for (i = 0; i < nb_components; i++) {
762 int n, h, v, x, y, c, j, linesize;
764 c = s->comp_index[i];
769 linesize = s->linesize[c];
771 for (j = 0; j < n; j++) {
773 // FIXME optimize this crap
774 ptr = s->picture_ptr->data[c] +
775 (linesize * (v * mb_y + y)) +
777 if (y == 0 && mb_y == 0) {
778 if (x == 0 && mb_x == 0)
779 pred = 128 << point_transform;
783 if (x == 0 && mb_x == 0)
784 pred = ptr[-linesize];
786 PREDICT(pred, ptr[-linesize - 1],
787 ptr[-linesize], ptr[-1], predictor);
790 if (s->interlaced && s->bottom_field)
791 ptr += linesize >> 1;
792 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
801 for (i = 0; i < nb_components; i++) {
803 int n, h, v, x, y, c, j, linesize;
805 c = s->comp_index[i];
810 linesize = s->linesize[c];
812 for (j = 0; j < n; j++) {
815 // FIXME optimize this crap
816 ptr = s->picture_ptr->data[c] +
817 (linesize * (v * mb_y + y)) +
819 PREDICT(pred, ptr[-linesize - 1],
820 ptr[-linesize], ptr[-1], predictor);
821 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
829 if (s->restart_interval && !--s->restart_count) {
830 align_get_bits(&s->gb);
831 skip_bits(&s->gb, 16); /* skip RSTn */
838 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
839 int Al, const uint8_t *mb_bitmask,
840 const AVFrame *reference)
843 uint8_t *data[MAX_COMPONENTS];
844 const uint8_t *reference_data[MAX_COMPONENTS];
845 int linesize[MAX_COMPONENTS];
846 GetBitContext mb_bitmask_gb;
849 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
851 for (i = 0; i < nb_components; i++) {
852 int c = s->comp_index[i];
853 data[c] = s->picture_ptr->data[c];
854 reference_data[c] = reference ? reference->data[c] : NULL;
855 linesize[c] = s->linesize[c];
856 s->coefs_finished[c] |= 1;
859 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
860 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
861 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
863 if (s->restart_interval && !s->restart_count)
864 s->restart_count = s->restart_interval;
866 if (get_bits_left(&s->gb) < 0) {
867 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
868 -get_bits_left(&s->gb));
869 return AVERROR_INVALIDDATA;
871 for (i = 0; i < nb_components; i++) {
873 int n, h, v, x, y, c, j;
876 c = s->comp_index[i];
881 for (j = 0; j < n; j++) {
882 block_offset = ((linesize[c] * (v * mb_y + y) * 8) +
885 if (s->interlaced && s->bottom_field)
886 block_offset += linesize[c] >> 1;
887 ptr = data[c] + block_offset;
888 if (!s->progressive) {
890 s->hdsp.put_pixels_tab[1][0](ptr,
891 reference_data[c] + block_offset,
894 s->bdsp.clear_block(s->block);
895 if (decode_block(s, s->block, i,
896 s->dc_index[i], s->ac_index[i],
897 s->quant_matrixes[s->quant_index[c]]) < 0) {
898 av_log(s->avctx, AV_LOG_ERROR,
899 "error y=%d x=%d\n", mb_y, mb_x);
900 return AVERROR_INVALIDDATA;
902 s->idsp.idct_put(ptr, linesize[c], s->block);
905 int block_idx = s->block_stride[c] * (v * mb_y + y) +
907 int16_t *block = s->blocks[c][block_idx];
909 block[0] += get_bits1(&s->gb) *
910 s->quant_matrixes[s->quant_index[c]][0] << Al;
911 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
912 s->quant_matrixes[s->quant_index[c]],
914 av_log(s->avctx, AV_LOG_ERROR,
915 "error y=%d x=%d\n", mb_y, mb_x);
916 return AVERROR_INVALIDDATA;
919 ff_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
920 ff_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
921 mb_x, mb_y, x, y, c, s->bottom_field,
922 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
930 if (s->restart_interval) {
932 i = 8 + ((-get_bits_count(&s->gb)) & 7);
934 if (show_bits(&s->gb, i) == (1 << i) - 1) {
935 int pos = get_bits_count(&s->gb);
936 align_get_bits(&s->gb);
937 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
938 skip_bits(&s->gb, 8);
939 if ((get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
940 for (i = 0; i < nb_components; i++) /* reset dc */
941 s->last_dc[i] = 1024;
943 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
951 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
952 int se, int Ah, int Al,
953 const uint8_t *mb_bitmask,
954 const AVFrame *reference)
958 int c = s->comp_index[0];
959 uint8_t *data = s->picture_ptr->data[c];
960 const uint8_t *reference_data = reference ? reference->data[c] : NULL;
961 int linesize = s->linesize[c];
963 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
964 GetBitContext mb_bitmask_gb;
966 if (ss < 0 || ss >= 64 ||
967 se < ss || se >= 64 ||
969 return AVERROR_INVALIDDATA;
972 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
975 // s->coefs_finished is a bitmask for coefficients coded
976 // ss and se are parameters telling start and end coefficients
977 s->coefs_finished[c] |= (~0ULL >> (63 - (se - ss))) << ss;
978 last_scan = !~s->coefs_finished[c];
981 if (s->interlaced && s->bottom_field) {
982 int offset = linesize >> 1;
984 reference_data += offset;
987 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
988 int block_offset = mb_y * linesize * 8;
989 uint8_t *ptr = data + block_offset;
990 int block_idx = mb_y * s->block_stride[c];
991 int16_t (*block)[64] = &s->blocks[c][block_idx];
992 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
993 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
994 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
999 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1000 quant_matrix, ss, se, Al, &EOBRUN);
1002 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1003 quant_matrix, ss, se, Al, &EOBRUN);
1005 av_log(s->avctx, AV_LOG_ERROR,
1006 "error y=%d x=%d\n", mb_y, mb_x);
1007 return AVERROR_INVALIDDATA;
1013 s->hdsp.put_pixels_tab[1][0](ptr,
1014 reference_data + block_offset,
1017 s->idsp.idct_put(ptr, linesize, *block);
1026 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1027 const AVFrame *reference)
1029 int len, nb_components, i, h, v, predictor, point_transform;
1031 const int block_size = s->lossless ? 1 : 8;
1032 int ilv, prev_shift;
1034 /* XXX: verify len field validity */
1035 len = get_bits(&s->gb, 16);
1036 nb_components = get_bits(&s->gb, 8);
1037 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1038 av_log(s->avctx, AV_LOG_ERROR,
1039 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1040 return AVERROR_PATCHWELCOME;
1042 if (len != 6 + 2 * nb_components) {
1043 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1044 return AVERROR_INVALIDDATA;
1046 for (i = 0; i < nb_components; i++) {
1047 id = get_bits(&s->gb, 8) - 1;
1048 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1049 /* find component index */
1050 for (index = 0; index < s->nb_components; index++)
1051 if (id == s->component_id[index])
1053 if (index == s->nb_components) {
1054 av_log(s->avctx, AV_LOG_ERROR,
1055 "decode_sos: index(%d) out of components\n", index);
1056 return AVERROR_INVALIDDATA;
1058 /* Metasoft MJPEG codec has Cb and Cr swapped */
1059 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1060 && nb_components == 3 && s->nb_components == 3 && i)
1063 s->comp_index[i] = index;
1065 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1066 s->h_scount[i] = s->h_count[index];
1067 s->v_scount[i] = s->v_count[index];
1069 s->dc_index[i] = get_bits(&s->gb, 4);
1070 s->ac_index[i] = get_bits(&s->gb, 4);
1072 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1073 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1075 if (!s->vlcs[0][s->dc_index[i]].table ||
1076 !s->vlcs[1][s->ac_index[i]].table)
1080 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1081 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1082 prev_shift = get_bits(&s->gb, 4); /* Ah */
1083 point_transform = get_bits(&s->gb, 4); /* Al */
1085 if (nb_components > 1) {
1086 /* interleaved stream */
1087 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1088 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1089 } else if (!s->ls) { /* skip this for JPEG-LS */
1090 h = s->h_max / s->h_scount[0];
1091 v = s->v_max / s->v_scount[0];
1092 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1093 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1094 s->nb_blocks[0] = 1;
1099 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1100 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n",
1101 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1102 predictor, point_transform, ilv, s->bits,
1103 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
1106 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1107 for (i = s->mjpb_skiptosod; i > 0; i--)
1108 skip_bits(&s->gb, 8);
1111 for (i = 0; i < nb_components; i++)
1112 s->last_dc[i] = 1024;
1115 if (CONFIG_JPEGLS_DECODER && s->ls) {
1117 // reset_ls_coding_parameters(s, 0);
1119 if ((ret = ff_jpegls_decode_picture(s, predictor,
1120 point_transform, ilv)) < 0)
1124 if ((ret = ljpeg_decode_rgb_scan(s, predictor,
1125 point_transform)) < 0)
1128 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1130 nb_components)) < 0)
1135 if (s->progressive && predictor) {
1136 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1143 if ((ret = mjpeg_decode_scan(s, nb_components,
1144 prev_shift, point_transform,
1145 mb_bitmask, reference)) < 0)
1150 if (s->interlaced &&
1151 get_bits_left(&s->gb) > 32 &&
1152 show_bits(&s->gb, 8) == 0xFF) {
1153 GetBitContext bak = s->gb;
1154 align_get_bits(&bak);
1155 if (show_bits(&bak, 16) == 0xFFD1) {
1156 ff_dlog(s->avctx, "AVRn interlaced picture marker found\n");
1158 skip_bits(&s->gb, 16);
1159 s->bottom_field ^= 1;
1168 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1169 return AVERROR_INVALIDDATA;
1172 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1174 if (get_bits(&s->gb, 16) != 4)
1175 return AVERROR_INVALIDDATA;
1176 s->restart_interval = get_bits(&s->gb, 16);
1177 s->restart_count = 0;
1178 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1179 s->restart_interval);
1184 static int mjpeg_decode_app(MJpegDecodeContext *s)
1188 len = get_bits(&s->gb, 16);
1190 return AVERROR_INVALIDDATA;
1191 if (8 * len > get_bits_left(&s->gb))
1192 return AVERROR_INVALIDDATA;
1194 id = get_bits_long(&s->gb, 32);
1195 id = av_be2ne32(id);
1198 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1199 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1201 /* Buggy AVID, it puts EOI only at every 10th frame. */
1202 /* Also, this fourcc is used by non-avid files too, it holds some
1203 information, but it's always present in AVID-created files. */
1204 if (id == AV_RL32("AVI1")) {
1210 4bytes field_size_less_padding
1213 i = get_bits(&s->gb, 8);
1215 s->bottom_field = 1;
1217 s->bottom_field = 0;
1219 skip_bits(&s->gb, 8);
1220 skip_bits(&s->gb, 32);
1221 skip_bits(&s->gb, 32);
1229 if (id == AV_RL32("JFIF")) {
1230 int t_w, t_h, v1, v2;
1231 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1232 v1 = get_bits(&s->gb, 8);
1233 v2 = get_bits(&s->gb, 8);
1234 skip_bits(&s->gb, 8);
1236 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1237 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1238 ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
1240 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1241 av_log(s->avctx, AV_LOG_INFO,
1242 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1244 s->avctx->sample_aspect_ratio.num,
1245 s->avctx->sample_aspect_ratio.den);
1247 t_w = get_bits(&s->gb, 8);
1248 t_h = get_bits(&s->gb, 8);
1250 /* skip thumbnail */
1251 if (len -10 - (t_w * t_h * 3) > 0)
1252 len -= t_w * t_h * 3;
1258 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1259 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1260 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1261 skip_bits(&s->gb, 16); /* version */
1262 skip_bits(&s->gb, 16); /* flags0 */
1263 skip_bits(&s->gb, 16); /* flags1 */
1264 skip_bits(&s->gb, 8); /* transform */
1269 if (id == AV_RL32("LJIF")) {
1270 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1271 av_log(s->avctx, AV_LOG_INFO,
1272 "Pegasus lossless jpeg header found\n");
1273 skip_bits(&s->gb, 16); /* version ? */
1274 skip_bits(&s->gb, 16); /* unknwon always 0? */
1275 skip_bits(&s->gb, 16); /* unknwon always 0? */
1276 skip_bits(&s->gb, 16); /* unknwon always 0? */
1277 switch (get_bits(&s->gb, 8)) {
1287 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1294 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1295 id = get_bits_long(&s->gb, 32);
1296 id = av_be2ne32(id);
1299 if (id == AV_RL32("mjpg")) {
1301 skip_bits(&s->gb, 32); /* field size */
1302 skip_bits(&s->gb, 32); /* pad field size */
1303 skip_bits(&s->gb, 32); /* next off */
1304 skip_bits(&s->gb, 32); /* quant off */
1305 skip_bits(&s->gb, 32); /* huff off */
1306 skip_bits(&s->gb, 32); /* image off */
1307 skip_bits(&s->gb, 32); /* scan off */
1308 skip_bits(&s->gb, 32); /* data off */
1310 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1311 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1316 /* slow but needed for extreme adobe jpegs */
1318 av_log(s->avctx, AV_LOG_ERROR,
1319 "mjpeg: error, decode_app parser read over the end\n");
1321 skip_bits(&s->gb, 8);
1326 static int mjpeg_decode_com(MJpegDecodeContext *s)
1328 int len = get_bits(&s->gb, 16);
1329 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1330 char *cbuf = av_malloc(len - 1);
1333 for (i = 0; i < len - 2; i++)
1334 cbuf[i] = get_bits(&s->gb, 8);
1335 if (i > 0 && cbuf[i - 1] == '\n')
1340 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1341 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1343 /* buggy avid, it puts EOI only at every 10th frame */
1344 if (!strcmp(cbuf, "AVID")) {
1346 } else if (!strcmp(cbuf, "CS=ITU601"))
1348 else if ((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
1349 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1359 /* return the 8 bit start code value and update the search
1360 state. Return -1 if no start code found */
1361 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1363 const uint8_t *buf_ptr;
1370 buf_ptr = *pbuf_ptr;
1371 while (buf_ptr < buf_end) {
1374 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1384 ff_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1385 *pbuf_ptr = buf_ptr;
1389 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1390 const uint8_t **buf_ptr, const uint8_t *buf_end,
1391 const uint8_t **unescaped_buf_ptr,
1392 int *unescaped_buf_size)
1395 start_code = find_marker(buf_ptr, buf_end);
1397 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1399 return AVERROR(ENOMEM);
1401 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1402 if (start_code == SOS && !s->ls) {
1403 const uint8_t *src = *buf_ptr;
1404 uint8_t *dst = s->buffer;
1406 while (src < buf_end) {
1407 uint8_t x = *(src++);
1410 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1412 while (src < buf_end && x == 0xff)
1415 if (x >= 0xd0 && x <= 0xd7)
1422 *unescaped_buf_ptr = s->buffer;
1423 *unescaped_buf_size = dst - s->buffer;
1424 memset(s->buffer + *unescaped_buf_size, 0,
1425 AV_INPUT_BUFFER_PADDING_SIZE);
1427 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1428 (buf_end - *buf_ptr) - (dst - s->buffer));
1429 } else if (start_code == SOS && s->ls) {
1430 const uint8_t *src = *buf_ptr;
1431 uint8_t *dst = s->buffer;
1439 while (src + t < buf_end) {
1440 uint8_t x = src[t++];
1442 while ((src + t < buf_end) && x == 0xff)
1451 init_put_bits(&pb, dst, t);
1453 /* unescape bitstream */
1455 uint8_t x = src[b++];
1456 put_bits(&pb, 8, x);
1459 put_bits(&pb, 7, x);
1463 flush_put_bits(&pb);
1465 *unescaped_buf_ptr = dst;
1466 *unescaped_buf_size = (bit_count + 7) >> 3;
1467 memset(s->buffer + *unescaped_buf_size, 0,
1468 AV_INPUT_BUFFER_PADDING_SIZE);
1470 *unescaped_buf_ptr = *buf_ptr;
1471 *unescaped_buf_size = buf_end - *buf_ptr;
1477 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1480 AVFrame *frame = data;
1481 const uint8_t *buf = avpkt->data;
1482 int buf_size = avpkt->size;
1483 MJpegDecodeContext *s = avctx->priv_data;
1484 const uint8_t *buf_end, *buf_ptr;
1485 const uint8_t *unescaped_buf_ptr;
1486 int unescaped_buf_size;
1490 s->got_picture = 0; // picture from previous image can not be reused
1492 buf_end = buf + buf_size;
1493 while (buf_ptr < buf_end) {
1494 /* find start next marker */
1495 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1497 &unescaped_buf_size);
1499 if (start_code < 0) {
1501 } else if (unescaped_buf_size > INT_MAX / 8) {
1502 av_log(avctx, AV_LOG_ERROR,
1503 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1504 start_code, unescaped_buf_size, buf_size);
1505 return AVERROR_INVALIDDATA;
1508 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1509 start_code, buf_end - buf_ptr);
1511 ret = init_get_bits(&s->gb, unescaped_buf_ptr,
1512 unescaped_buf_size * 8);
1516 s->start_code = start_code;
1517 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1518 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1520 /* process markers */
1521 if (start_code >= 0xd0 && start_code <= 0xd7)
1522 av_log(avctx, AV_LOG_DEBUG,
1523 "restart marker: %d\n", start_code & 0x0f);
1525 else if (start_code >= APP0 && start_code <= APP15)
1526 mjpeg_decode_app(s);
1528 else if (start_code == COM)
1529 mjpeg_decode_com(s);
1531 if (!CONFIG_JPEGLS_DECODER &&
1532 (start_code == SOF48 || start_code == LSE)) {
1533 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
1534 return AVERROR(ENOSYS);
1537 switch (start_code) {
1539 s->restart_interval = 0;
1540 s->restart_count = 0;
1541 /* nothing to do on SOI */
1544 ff_mjpeg_decode_dqt(s);
1547 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1548 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1557 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1564 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1571 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1578 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1582 if (!CONFIG_JPEGLS_DECODER ||
1583 (ret = ff_jpegls_decode_lse(s)) < 0)
1588 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1591 if (!s->got_picture) {
1592 av_log(avctx, AV_LOG_WARNING,
1593 "Found EOI before any SOF, ignoring\n");
1596 if (s->interlaced) {
1597 s->bottom_field ^= 1;
1598 /* if not bottom field, do not output image yet */
1599 if (s->bottom_field == !s->interlace_polarity)
1602 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
1606 for (i = 0; frame->data[i]; i++) {
1607 int h = frame->height >> ((i == 1 || i == 2) ?
1608 s->pix_desc->log2_chroma_h : 0);
1609 frame->data[i] += frame->linesize[i] * (h - 1);
1610 frame->linesize[i] *= -1;
1616 avctx->debug & FF_DEBUG_QP) {
1617 av_log(avctx, AV_LOG_DEBUG,
1618 "QP: %d\n", FFMAX3(s->qscale[0],
1625 if (!s->got_picture) {
1626 av_log(avctx, AV_LOG_WARNING,
1627 "Can not process SOS before SOF, skipping\n");
1630 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1631 (avctx->err_recognition & AV_EF_EXPLODE))
1633 /* buggy avid puts EOI every 10-20th frame */
1634 /* if restart period is over process EOI */
1635 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1639 mjpeg_decode_dri(s);
1651 av_log(avctx, AV_LOG_ERROR,
1652 "mjpeg: unsupported coding type (%x)\n", start_code);
1657 /* eof process start code */
1658 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1659 av_log(avctx, AV_LOG_DEBUG,
1660 "marker parser used %d bytes (%d bits)\n",
1661 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1663 if (s->got_picture) {
1664 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1667 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1668 return AVERROR_INVALIDDATA;
1670 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n",
1672 // return buf_end - buf_ptr;
1673 return buf_ptr - buf;
1676 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1678 MJpegDecodeContext *s = avctx->priv_data;
1682 av_frame_free(&s->picture);
1683 s->picture_ptr = NULL;
1684 } else if (s->picture_ptr)
1685 av_frame_unref(s->picture_ptr);
1688 av_freep(&s->ljpeg_buffer);
1689 s->ljpeg_buffer_size = 0;
1691 for (i = 0; i < 3; i++) {
1692 for (j = 0; j < 4; j++)
1693 ff_free_vlc(&s->vlcs[i][j]);
1695 for (i = 0; i < MAX_COMPONENTS; i++) {
1696 av_freep(&s->blocks[i]);
1697 av_freep(&s->last_nnz[i]);
1702 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1703 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1704 static const AVOption options[] = {
1705 { "extern_huff", "Use external huffman table.",
1706 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
1710 static const AVClass mjpegdec_class = {
1711 .class_name = "MJPEG decoder",
1712 .item_name = av_default_item_name,
1714 .version = LIBAVUTIL_VERSION_INT,
1717 AVCodec ff_mjpeg_decoder = {
1719 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1720 .type = AVMEDIA_TYPE_VIDEO,
1721 .id = AV_CODEC_ID_MJPEG,
1722 .priv_data_size = sizeof(MJpegDecodeContext),
1723 .init = ff_mjpeg_decode_init,
1724 .close = ff_mjpeg_decode_end,
1725 .decode = ff_mjpeg_decode_frame,
1726 .capabilities = AV_CODEC_CAP_DR1,
1727 .priv_class = &mjpegdec_class,
1728 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
1731 AVCodec ff_thp_decoder = {
1733 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
1734 .type = AVMEDIA_TYPE_VIDEO,
1735 .id = AV_CODEC_ID_THP,
1736 .priv_data_size = sizeof(MJpegDecodeContext),
1737 .init = ff_mjpeg_decode_init,
1738 .close = ff_mjpeg_decode_end,
1739 .decode = ff_mjpeg_decode_frame,
1740 .capabilities = AV_CODEC_CAP_DR1,
1741 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,