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
36 #include "libavutil/imgutils.h"
37 #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;
90 s->picture_ptr = &s->picture;
93 ff_dsputil_init(&s->dsp, avctx);
94 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
99 s->org_height = avctx->coded_height;
100 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
102 build_basic_mjpeg_vlc(s);
104 if (s->extern_huff) {
106 av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
107 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
108 if ((ret = ff_mjpeg_decode_dht(s))) {
109 av_log(avctx, AV_LOG_ERROR,
110 "mjpeg: error using external huffman table\n");
114 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
115 s->interlace_polarity = 1; /* bottom field first */
116 av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
118 if (avctx->codec->id == AV_CODEC_ID_AMV)
125 /* quantize tables */
126 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
128 int len, index, i, j;
130 len = get_bits(&s->gb, 16) - 2;
133 /* only 8 bit precision handled */
134 if (get_bits(&s->gb, 4) != 0) {
135 av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
138 index = get_bits(&s->gb, 4);
141 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
142 /* read quant table */
143 for (i = 0; i < 64; i++) {
144 j = s->scantable.permutated[i];
145 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
148 // XXX FIXME finetune, and perhaps add dc too
149 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
150 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
151 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
152 index, s->qscale[index]);
158 /* decode huffman tables and build VLC decoders */
159 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
161 int len, index, i, class, n, v, code_max;
162 uint8_t bits_table[17];
163 uint8_t val_table[256];
166 len = get_bits(&s->gb, 16) - 2;
170 return AVERROR_INVALIDDATA;
171 class = get_bits(&s->gb, 4);
173 return AVERROR_INVALIDDATA;
174 index = get_bits(&s->gb, 4);
176 return AVERROR_INVALIDDATA;
178 for (i = 1; i <= 16; i++) {
179 bits_table[i] = get_bits(&s->gb, 8);
183 if (len < n || n > 256)
184 return AVERROR_INVALIDDATA;
187 for (i = 0; i < n; i++) {
188 v = get_bits(&s->gb, 8);
195 /* build VLC and flush previous vlc if present */
196 ff_free_vlc(&s->vlcs[class][index]);
197 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
198 class, index, code_max + 1);
199 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
200 code_max + 1, 0, class > 0)) < 0)
204 ff_free_vlc(&s->vlcs[2][index]);
205 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
206 code_max + 1, 0, 0)) < 0)
213 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
215 int len, nb_components, i, width, height, pix_fmt_id;
217 /* XXX: verify len field validity */
218 len = get_bits(&s->gb, 16);
219 s->bits = get_bits(&s->gb, 8);
223 if (s->bits == 9 && !s->pegasus_rct)
224 s->rct = 1; // FIXME ugly
226 if (s->bits != 8 && !s->lossless) {
227 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
231 height = get_bits(&s->gb, 16);
232 width = get_bits(&s->gb, 16);
234 // HACK for odd_height.mov
235 if (s->interlaced && s->width == width && s->height == height + 1)
238 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
239 if (av_image_check_size(width, height, 0, s->avctx))
240 return AVERROR_INVALIDDATA;
242 nb_components = get_bits(&s->gb, 8);
243 if (nb_components <= 0 ||
244 nb_components > MAX_COMPONENTS)
246 if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
247 av_log_missing_feature(s->avctx,
248 "For JPEG-LS anything except <= 8 bits/component"
249 " or 16-bit gray", 0);
250 return AVERROR_PATCHWELCOME;
252 s->nb_components = nb_components;
255 for (i = 0; i < nb_components; i++) {
257 s->component_id[i] = get_bits(&s->gb, 8) - 1;
258 s->h_count[i] = get_bits(&s->gb, 4);
259 s->v_count[i] = get_bits(&s->gb, 4);
260 /* compute hmax and vmax (only used in interleaved case) */
261 if (s->h_count[i] > s->h_max)
262 s->h_max = s->h_count[i];
263 if (s->v_count[i] > s->v_max)
264 s->v_max = s->v_count[i];
265 s->quant_index[i] = get_bits(&s->gb, 8);
266 if (s->quant_index[i] >= 4)
267 return AVERROR_INVALIDDATA;
268 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
269 i, s->h_count[i], s->v_count[i],
270 s->component_id[i], s->quant_index[i]);
273 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
274 av_log_missing_feature(s->avctx, "Subsampling in JPEG-LS", 0);
275 return AVERROR_PATCHWELCOME;
278 if (s->v_max == 1 && s->h_max == 1 && s->lossless == 1)
281 /* if different size, realloc/alloc picture */
282 /* XXX: also check h_count and v_count */
283 if (width != s->width || height != s->height) {
284 av_freep(&s->qscale_table);
290 /* test interlaced mode */
291 if (s->first_picture &&
292 s->org_height != 0 &&
293 s->height < ((s->org_height * 3) / 4)) {
295 s->bottom_field = s->interlace_polarity;
296 s->picture_ptr->interlaced_frame = 1;
297 s->picture_ptr->top_field_first = !s->interlace_polarity;
301 avcodec_set_dimensions(s->avctx, width, height);
303 s->qscale_table = av_mallocz((s->width + 15) / 16);
304 s->first_picture = 0;
307 if (!(s->interlaced && (s->bottom_field == !s->interlace_polarity))) {
308 /* XXX: not complete test ! */
309 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
310 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
311 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
312 (s->h_count[3] << 4) | s->v_count[3];
313 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
314 /* NOTE we do not allocate pictures large enough for the possible
315 * padding of h/v_count being 4 */
316 if (!(pix_fmt_id & 0xD0D0D0D0))
317 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
318 if (!(pix_fmt_id & 0x0D0D0D0D))
319 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
321 switch (pix_fmt_id) {
324 s->avctx->pix_fmt = AV_PIX_FMT_BGRA;
326 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
327 assert(s->nb_components == 3);
330 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
333 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
336 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
339 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
342 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
343 return AVERROR_PATCHWELCOME;
346 if (s->nb_components > 1)
347 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
348 else if (s->bits <= 8)
349 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
351 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
354 if (s->picture_ptr->data[0])
355 s->avctx->release_buffer(s->avctx, s->picture_ptr);
357 if (ff_get_buffer(s->avctx, s->picture_ptr) < 0) {
358 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
361 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
362 s->picture_ptr->key_frame = 1;
365 for (i = 0; i < 3; i++)
366 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
368 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
369 s->width, s->height, s->linesize[0], s->linesize[1],
370 s->interlaced, s->avctx->height);
372 if (len != (8 + (3 * nb_components)))
373 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
376 /* totally blank picture as progressive JPEG will only add details to it */
377 if (s->progressive) {
378 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
379 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
380 for (i = 0; i < s->nb_components; i++) {
381 int size = bw * bh * s->h_count[i] * s->v_count[i];
382 av_freep(&s->blocks[i]);
383 av_freep(&s->last_nnz[i]);
384 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
385 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
386 s->block_stride[i] = bw * s->h_count[i];
388 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
393 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
396 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
398 av_log(s->avctx, AV_LOG_WARNING,
399 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
400 0, dc_index, &s->vlcs[0][dc_index]);
405 return get_xbits(&s->gb, code);
410 /* decode block and dequantize */
411 static int decode_block(MJpegDecodeContext *s, DCTELEM *block, int component,
412 int dc_index, int ac_index, int16_t *quant_matrix)
414 int code, i, j, level, val;
417 val = mjpeg_decode_dc(s, dc_index);
419 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
420 return AVERROR_INVALIDDATA;
422 val = val * quant_matrix[0] + s->last_dc[component];
423 s->last_dc[component] = val;
427 {OPEN_READER(re, &s->gb);
429 UPDATE_CACHE(re, &s->gb);
430 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
432 i += ((unsigned)code) >> 4;
435 if (code > MIN_CACHE_BITS - 16)
436 UPDATE_CACHE(re, &s->gb);
439 int cache = GET_CACHE(re, &s->gb);
440 int sign = (~cache) >> 31;
441 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
444 LAST_SKIP_BITS(re, &s->gb, code);
447 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
448 return AVERROR_INVALIDDATA;
450 j = s->scantable.permutated[i];
451 block[j] = level * quant_matrix[j];
454 CLOSE_READER(re, &s->gb);}
459 static int decode_dc_progressive(MJpegDecodeContext *s, DCTELEM *block,
460 int component, int dc_index,
461 int16_t *quant_matrix, int Al)
464 s->dsp.clear_block(block);
465 val = mjpeg_decode_dc(s, dc_index);
467 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
468 return AVERROR_INVALIDDATA;
470 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
471 s->last_dc[component] = val;
476 /* decode block and dequantize - progressive JPEG version */
477 static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block,
478 uint8_t *last_nnz, int ac_index,
479 int16_t *quant_matrix,
480 int ss, int se, int Al, int *EOBRUN)
482 int code, i, j, level, val, run;
490 OPEN_READER(re, &s->gb);
491 for (i = ss; ; i++) {
492 UPDATE_CACHE(re, &s->gb);
493 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
495 run = ((unsigned) code) >> 4;
499 if (code > MIN_CACHE_BITS - 16)
500 UPDATE_CACHE(re, &s->gb);
503 int cache = GET_CACHE(re, &s->gb);
504 int sign = (~cache) >> 31;
505 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
508 LAST_SKIP_BITS(re, &s->gb, code);
512 j = s->scantable.permutated[se];
513 block[j] = level * quant_matrix[j] << Al;
516 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
517 return AVERROR_INVALIDDATA;
519 j = s->scantable.permutated[i];
520 block[j] = level * quant_matrix[j] << Al;
522 if (run == 0xF) {// ZRL - skip 15 coefficients
525 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
526 return AVERROR_INVALIDDATA;
531 UPDATE_CACHE(re, &s->gb);
532 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
533 LAST_SKIP_BITS(re, &s->gb, run);
540 CLOSE_READER(re, &s->gb);
549 #define REFINE_BIT(j) { \
550 UPDATE_CACHE(re, &s->gb); \
551 sign = block[j] >> 15; \
552 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
553 ((quant_matrix[j] ^ sign) - sign) << Al; \
554 LAST_SKIP_BITS(re, &s->gb, 1); \
562 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
567 j = s->scantable.permutated[i]; \
570 else if (run-- == 0) \
574 /* decode block and dequantize - progressive JPEG refinement pass */
575 static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block,
577 int ac_index, int16_t *quant_matrix,
578 int ss, int se, int Al, int *EOBRUN)
580 int code, i = ss, j, sign, val, run;
581 int last = FFMIN(se, *last_nnz);
583 OPEN_READER(re, &s->gb);
588 UPDATE_CACHE(re, &s->gb);
589 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
592 run = ((unsigned) code) >> 4;
593 UPDATE_CACHE(re, &s->gb);
594 val = SHOW_UBITS(re, &s->gb, 1);
595 LAST_SKIP_BITS(re, &s->gb, 1);
597 j = s->scantable.permutated[i];
599 block[j] = ((quant_matrix[j]^val) - val) << Al;
603 CLOSE_READER(re, &s->gb);
607 run = ((unsigned) code) >> 4;
614 UPDATE_CACHE(re, &s->gb);
615 run += SHOW_UBITS(re, &s->gb, val);
616 LAST_SKIP_BITS(re, &s->gb, val);
628 for (; i <= last; i++) {
629 j = s->scantable.permutated[i];
633 CLOSE_READER(re, &s->gb);
640 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor,
644 uint16_t (*buffer)[4];
645 int left[3], top[3], topleft[3];
646 const int linesize = s->linesize[0];
647 const int mask = (1 << s->bits) - 1;
649 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
650 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
651 buffer = s->ljpeg_buffer;
653 for (i = 0; i < 3; i++)
654 buffer[0][i] = 1 << (s->bits + point_transform - 1);
656 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
657 const int modified_predictor = mb_y ? predictor : 1;
658 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
660 if (s->interlaced && s->bottom_field)
661 ptr += linesize >> 1;
663 for (i = 0; i < 3; i++)
664 top[i] = left[i] = topleft[i] = buffer[0][i];
666 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
667 if (s->restart_interval && !s->restart_count)
668 s->restart_count = s->restart_interval;
670 for (i = 0; i < 3; i++) {
674 top[i] = buffer[mb_x][i];
676 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
678 left[i] = buffer[mb_x][i] =
679 mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
682 if (s->restart_interval && !--s->restart_count) {
683 align_get_bits(&s->gb);
684 skip_bits(&s->gb, 16); /* skip RSTn */
689 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
690 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
691 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
692 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
694 } else if (s->pegasus_rct) {
695 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
696 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
697 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
698 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
701 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
702 ptr[4 * mb_x + 0] = buffer[mb_x][2];
703 ptr[4 * mb_x + 1] = buffer[mb_x][1];
704 ptr[4 * mb_x + 2] = buffer[mb_x][0];
711 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
715 const int nb_components = 3;
717 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
718 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
719 if (s->restart_interval && !s->restart_count)
720 s->restart_count = s->restart_interval;
722 if (mb_x == 0 || mb_y == 0 || s->interlaced) {
723 for (i = 0; i < nb_components; i++) {
725 int n, h, v, x, y, c, j, linesize;
727 c = s->comp_index[i];
732 linesize = s->linesize[c];
734 for (j = 0; j < n; j++) {
736 // FIXME optimize this crap
737 ptr = s->picture_ptr->data[c] +
738 (linesize * (v * mb_y + y)) +
740 if (y == 0 && mb_y == 0) {
741 if (x == 0 && mb_x == 0)
742 pred = 128 << point_transform;
746 if (x == 0 && mb_x == 0)
747 pred = ptr[-linesize];
749 PREDICT(pred, ptr[-linesize - 1],
750 ptr[-linesize], ptr[-1], predictor);
753 if (s->interlaced && s->bottom_field)
754 ptr += linesize >> 1;
755 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
764 for (i = 0; i < nb_components; i++) {
766 int n, h, v, x, y, c, j, linesize;
768 c = s->comp_index[i];
773 linesize = s->linesize[c];
775 for (j = 0; j < n; j++) {
778 // FIXME optimize this crap
779 ptr = s->picture_ptr->data[c] +
780 (linesize * (v * mb_y + y)) +
782 PREDICT(pred, ptr[-linesize - 1],
783 ptr[-linesize], ptr[-1], predictor);
784 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
792 if (s->restart_interval && !--s->restart_count) {
793 align_get_bits(&s->gb);
794 skip_bits(&s->gb, 16); /* skip RSTn */
801 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
802 int Al, const uint8_t *mb_bitmask,
803 const AVFrame *reference)
806 uint8_t *data[MAX_COMPONENTS];
807 const uint8_t *reference_data[MAX_COMPONENTS];
808 int linesize[MAX_COMPONENTS];
809 GetBitContext mb_bitmask_gb;
812 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
814 if (s->flipped && s->avctx->flags & CODEC_FLAG_EMU_EDGE) {
815 av_log(s->avctx, AV_LOG_ERROR,
816 "Can not flip image with CODEC_FLAG_EMU_EDGE set!\n");
820 for (i = 0; i < nb_components; i++) {
821 int c = s->comp_index[i];
822 data[c] = s->picture_ptr->data[c];
823 reference_data[c] = reference ? reference->data[c] : NULL;
824 linesize[c] = s->linesize[c];
825 s->coefs_finished[c] |= 1;
827 // picture should be flipped upside-down for this codec
828 int offset = (linesize[c] * (s->v_scount[i] *
829 (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
831 reference_data[c] += offset;
836 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
837 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
838 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
840 if (s->restart_interval && !s->restart_count)
841 s->restart_count = s->restart_interval;
843 if (get_bits_left(&s->gb) < 0) {
844 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
845 -get_bits_left(&s->gb));
846 return AVERROR_INVALIDDATA;
848 for (i = 0; i < nb_components; i++) {
850 int n, h, v, x, y, c, j;
853 c = s->comp_index[i];
858 for (j = 0; j < n; j++) {
859 block_offset = ((linesize[c] * (v * mb_y + y) * 8) +
862 if (s->interlaced && s->bottom_field)
863 block_offset += linesize[c] >> 1;
864 ptr = data[c] + block_offset;
865 if (!s->progressive) {
867 copy_block8(ptr, reference_data[c] + block_offset,
868 linesize[c], linesize[c], 8);
870 s->dsp.clear_block(s->block);
871 if (decode_block(s, s->block, i,
872 s->dc_index[i], s->ac_index[i],
873 s->quant_matrixes[s->quant_index[c]]) < 0) {
874 av_log(s->avctx, AV_LOG_ERROR,
875 "error y=%d x=%d\n", mb_y, mb_x);
876 return AVERROR_INVALIDDATA;
878 s->dsp.idct_put(ptr, linesize[c], s->block);
881 int block_idx = s->block_stride[c] * (v * mb_y + y) +
883 DCTELEM *block = s->blocks[c][block_idx];
885 block[0] += get_bits1(&s->gb) *
886 s->quant_matrixes[s->quant_index[c]][0] << Al;
887 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
888 s->quant_matrixes[s->quant_index[c]],
890 av_log(s->avctx, AV_LOG_ERROR,
891 "error y=%d x=%d\n", mb_y, mb_x);
892 return AVERROR_INVALIDDATA;
895 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
896 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
897 mb_x, mb_y, x, y, c, s->bottom_field,
898 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
906 if (s->restart_interval) {
908 i = 8 + ((-get_bits_count(&s->gb)) & 7);
910 if (show_bits(&s->gb, i) == (1 << i) - 1) {
911 int pos = get_bits_count(&s->gb);
912 align_get_bits(&s->gb);
913 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
914 skip_bits(&s->gb, 8);
915 if ((get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
916 for (i = 0; i < nb_components; i++) /* reset dc */
917 s->last_dc[i] = 1024;
919 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
927 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
928 int se, int Ah, int Al,
929 const uint8_t *mb_bitmask,
930 const AVFrame *reference)
934 int c = s->comp_index[0];
935 uint8_t *data = s->picture_ptr->data[c];
936 const uint8_t *reference_data = reference ? reference->data[c] : NULL;
937 int linesize = s->linesize[c];
939 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
940 GetBitContext mb_bitmask_gb;
943 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
946 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
947 last_scan = !~s->coefs_finished[c];
950 if (s->interlaced && s->bottom_field) {
951 int offset = linesize >> 1;
953 reference_data += offset;
956 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
957 int block_offset = mb_y * linesize * 8;
958 uint8_t *ptr = data + block_offset;
959 int block_idx = mb_y * s->block_stride[c];
960 DCTELEM (*block)[64] = &s->blocks[c][block_idx];
961 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
962 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
963 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
968 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
969 quant_matrix, ss, se, Al, &EOBRUN);
971 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
972 quant_matrix, ss, se, Al, &EOBRUN);
974 av_log(s->avctx, AV_LOG_ERROR,
975 "error y=%d x=%d\n", mb_y, mb_x);
976 return AVERROR_INVALIDDATA;
982 copy_block8(ptr, reference_data + block_offset,
983 linesize, linesize, 8);
985 s->dsp.idct_put(ptr, linesize, *block);
994 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
995 const AVFrame *reference)
997 int len, nb_components, i, h, v, predictor, point_transform;
999 const int block_size = s->lossless ? 1 : 8;
1000 int ilv, prev_shift;
1002 /* XXX: verify len field validity */
1003 len = get_bits(&s->gb, 16);
1004 nb_components = get_bits(&s->gb, 8);
1005 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1006 av_log(s->avctx, AV_LOG_ERROR,
1007 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1008 return AVERROR_PATCHWELCOME;
1010 if (len != 6 + 2 * nb_components) {
1011 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1012 return AVERROR_INVALIDDATA;
1014 for (i = 0; i < nb_components; i++) {
1015 id = get_bits(&s->gb, 8) - 1;
1016 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1017 /* find component index */
1018 for (index = 0; index < s->nb_components; index++)
1019 if (id == s->component_id[index])
1021 if (index == s->nb_components) {
1022 av_log(s->avctx, AV_LOG_ERROR,
1023 "decode_sos: index(%d) out of components\n", index);
1024 return AVERROR_INVALIDDATA;
1026 /* Metasoft MJPEG codec has Cb and Cr swapped */
1027 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1028 && nb_components == 3 && s->nb_components == 3 && i)
1031 s->comp_index[i] = index;
1033 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1034 s->h_scount[i] = s->h_count[index];
1035 s->v_scount[i] = s->v_count[index];
1037 s->dc_index[i] = get_bits(&s->gb, 4);
1038 s->ac_index[i] = get_bits(&s->gb, 4);
1040 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1041 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1043 if (!s->vlcs[0][s->dc_index[i]].table ||
1044 !s->vlcs[1][s->ac_index[i]].table)
1048 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1049 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1050 prev_shift = get_bits(&s->gb, 4); /* Ah */
1051 point_transform = get_bits(&s->gb, 4); /* Al */
1053 if (nb_components > 1) {
1054 /* interleaved stream */
1055 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1056 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1057 } else if (!s->ls) { /* skip this for JPEG-LS */
1058 h = s->h_max / s->h_scount[0];
1059 v = s->v_max / s->v_scount[0];
1060 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1061 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1062 s->nb_blocks[0] = 1;
1067 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1068 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n",
1069 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1070 predictor, point_transform, ilv, s->bits,
1071 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
1074 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1075 for (i = s->mjpb_skiptosod; i > 0; i--)
1076 skip_bits(&s->gb, 8);
1079 for (i = 0; i < nb_components; i++)
1080 s->last_dc[i] = 1024;
1083 if (CONFIG_JPEGLS_DECODER && s->ls) {
1085 // reset_ls_coding_parameters(s, 0);
1087 if ((ret = ff_jpegls_decode_picture(s, predictor,
1088 point_transform, ilv)) < 0)
1092 if ((ret = ljpeg_decode_rgb_scan(s, predictor,
1093 point_transform)) < 0)
1096 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1097 point_transform)) < 0)
1102 if (s->progressive && predictor) {
1103 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1110 if ((ret = mjpeg_decode_scan(s, nb_components,
1111 prev_shift, point_transform,
1112 mb_bitmask, reference)) < 0)
1117 if (s->interlaced &&
1118 get_bits_left(&s->gb) > 32 &&
1119 show_bits(&s->gb, 8) == 0xFF) {
1120 GetBitContext bak = s->gb;
1121 align_get_bits(&bak);
1122 if (show_bits(&bak, 16) == 0xFFD1) {
1123 av_dlog(s->avctx, "AVRn interlaced picture marker found\n");
1125 skip_bits(&s->gb, 16);
1126 s->bottom_field ^= 1;
1135 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1136 return AVERROR_INVALIDDATA;
1139 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1141 if (get_bits(&s->gb, 16) != 4)
1142 return AVERROR_INVALIDDATA;
1143 s->restart_interval = get_bits(&s->gb, 16);
1144 s->restart_count = 0;
1145 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1146 s->restart_interval);
1151 static int mjpeg_decode_app(MJpegDecodeContext *s)
1155 len = get_bits(&s->gb, 16);
1157 return AVERROR_INVALIDDATA;
1158 if (8 * len > get_bits_left(&s->gb))
1159 return AVERROR_INVALIDDATA;
1161 id = get_bits_long(&s->gb, 32);
1162 id = av_be2ne32(id);
1165 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1166 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1168 /* Buggy AVID, it puts EOI only at every 10th frame. */
1169 /* Also, this fourcc is used by non-avid files too, it holds some
1170 information, but it's always present in AVID-created files. */
1171 if (id == AV_RL32("AVI1")) {
1177 4bytes field_size_less_padding
1180 i = get_bits(&s->gb, 8);
1182 s->bottom_field = 1;
1184 s->bottom_field = 0;
1186 skip_bits(&s->gb, 8);
1187 skip_bits(&s->gb, 32);
1188 skip_bits(&s->gb, 32);
1196 if (id == AV_RL32("JFIF")) {
1197 int t_w, t_h, v1, v2;
1198 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1199 v1 = get_bits(&s->gb, 8);
1200 v2 = get_bits(&s->gb, 8);
1201 skip_bits(&s->gb, 8);
1203 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1204 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1206 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1207 av_log(s->avctx, AV_LOG_INFO,
1208 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1210 s->avctx->sample_aspect_ratio.num,
1211 s->avctx->sample_aspect_ratio.den);
1213 t_w = get_bits(&s->gb, 8);
1214 t_h = get_bits(&s->gb, 8);
1216 /* skip thumbnail */
1217 if (len -10 - (t_w * t_h * 3) > 0)
1218 len -= t_w * t_h * 3;
1224 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1225 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1226 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1227 skip_bits(&s->gb, 16); /* version */
1228 skip_bits(&s->gb, 16); /* flags0 */
1229 skip_bits(&s->gb, 16); /* flags1 */
1230 skip_bits(&s->gb, 8); /* transform */
1235 if (id == AV_RL32("LJIF")) {
1236 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1237 av_log(s->avctx, AV_LOG_INFO,
1238 "Pegasus lossless jpeg header found\n");
1239 skip_bits(&s->gb, 16); /* version ? */
1240 skip_bits(&s->gb, 16); /* unknwon always 0? */
1241 skip_bits(&s->gb, 16); /* unknwon always 0? */
1242 skip_bits(&s->gb, 16); /* unknwon always 0? */
1243 switch (get_bits(&s->gb, 8)) {
1253 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1260 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1261 id = get_bits_long(&s->gb, 32);
1262 id = av_be2ne32(id);
1265 if (id == AV_RL32("mjpg")) {
1267 skip_bits(&s->gb, 32); /* field size */
1268 skip_bits(&s->gb, 32); /* pad field size */
1269 skip_bits(&s->gb, 32); /* next off */
1270 skip_bits(&s->gb, 32); /* quant off */
1271 skip_bits(&s->gb, 32); /* huff off */
1272 skip_bits(&s->gb, 32); /* image off */
1273 skip_bits(&s->gb, 32); /* scan off */
1274 skip_bits(&s->gb, 32); /* data off */
1276 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1277 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1282 /* slow but needed for extreme adobe jpegs */
1284 av_log(s->avctx, AV_LOG_ERROR,
1285 "mjpeg: error, decode_app parser read over the end\n");
1287 skip_bits(&s->gb, 8);
1292 static int mjpeg_decode_com(MJpegDecodeContext *s)
1294 int len = get_bits(&s->gb, 16);
1295 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1296 char *cbuf = av_malloc(len - 1);
1299 for (i = 0; i < len - 2; i++)
1300 cbuf[i] = get_bits(&s->gb, 8);
1301 if (i > 0 && cbuf[i - 1] == '\n')
1306 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1307 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1309 /* buggy avid, it puts EOI only at every 10th frame */
1310 if (!strcmp(cbuf, "AVID")) {
1312 } else if (!strcmp(cbuf, "CS=ITU601"))
1314 else if ((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
1315 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1325 /* return the 8 bit start code value and update the search
1326 state. Return -1 if no start code found */
1327 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1329 const uint8_t *buf_ptr;
1336 buf_ptr = *pbuf_ptr;
1337 while (buf_ptr < buf_end) {
1340 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1350 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1351 *pbuf_ptr = buf_ptr;
1355 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1356 const uint8_t **buf_ptr, const uint8_t *buf_end,
1357 const uint8_t **unescaped_buf_ptr,
1358 int *unescaped_buf_size)
1361 start_code = find_marker(buf_ptr, buf_end);
1363 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1365 return AVERROR(ENOMEM);
1367 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1368 if (start_code == SOS && !s->ls) {
1369 const uint8_t *src = *buf_ptr;
1370 uint8_t *dst = s->buffer;
1372 while (src < buf_end) {
1373 uint8_t x = *(src++);
1376 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1378 while (src < buf_end && x == 0xff)
1381 if (x >= 0xd0 && x <= 0xd7)
1388 *unescaped_buf_ptr = s->buffer;
1389 *unescaped_buf_size = dst - s->buffer;
1391 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1392 (buf_end - *buf_ptr) - (dst - s->buffer));
1393 } else if (start_code == SOS && s->ls) {
1394 const uint8_t *src = *buf_ptr;
1395 uint8_t *dst = s->buffer;
1403 while (src + t < buf_end) {
1404 uint8_t x = src[t++];
1406 while ((src + t < buf_end) && x == 0xff)
1415 init_put_bits(&pb, dst, t);
1417 /* unescape bitstream */
1419 uint8_t x = src[b++];
1420 put_bits(&pb, 8, x);
1423 put_bits(&pb, 7, x);
1427 flush_put_bits(&pb);
1429 *unescaped_buf_ptr = dst;
1430 *unescaped_buf_size = (bit_count + 7) >> 3;
1432 *unescaped_buf_ptr = *buf_ptr;
1433 *unescaped_buf_size = buf_end - *buf_ptr;
1439 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1442 const uint8_t *buf = avpkt->data;
1443 int buf_size = avpkt->size;
1444 MJpegDecodeContext *s = avctx->priv_data;
1445 const uint8_t *buf_end, *buf_ptr;
1446 const uint8_t *unescaped_buf_ptr;
1447 int unescaped_buf_size;
1450 AVFrame *picture = data;
1452 s->got_picture = 0; // picture from previous image can not be reused
1454 buf_end = buf + buf_size;
1455 while (buf_ptr < buf_end) {
1456 /* find start next marker */
1457 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1459 &unescaped_buf_size);
1461 if (start_code < 0) {
1463 } else if (unescaped_buf_size > (1U<<29)) {
1464 av_log(avctx, AV_LOG_ERROR, "MJPEG packet 0x%x too big (0x%x/0x%x), corrupt data?\n",
1465 start_code, unescaped_buf_size, buf_size);
1466 return AVERROR_INVALIDDATA;
1468 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1469 start_code, buf_end - buf_ptr);
1471 init_get_bits(&s->gb, unescaped_buf_ptr, unescaped_buf_size * 8);
1473 s->start_code = start_code;
1474 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1475 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1477 /* process markers */
1478 if (start_code >= 0xd0 && start_code <= 0xd7)
1479 av_log(avctx, AV_LOG_DEBUG,
1480 "restart marker: %d\n", start_code & 0x0f);
1482 else if (start_code >= APP0 && start_code <= APP15)
1483 mjpeg_decode_app(s);
1485 else if (start_code == COM)
1486 mjpeg_decode_com(s);
1488 switch (start_code) {
1490 s->restart_interval = 0;
1491 s->restart_count = 0;
1492 /* nothing to do on SOI */
1495 ff_mjpeg_decode_dqt(s);
1498 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1499 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1508 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1515 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1522 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1529 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1533 if (!CONFIG_JPEGLS_DECODER ||
1534 (ret = ff_jpegls_decode_lse(s)) < 0)
1539 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1542 if (!s->got_picture) {
1543 av_log(avctx, AV_LOG_WARNING,
1544 "Found EOI before any SOF, ignoring\n");
1547 if (s->interlaced) {
1548 s->bottom_field ^= 1;
1549 /* if not bottom field, do not output image yet */
1550 if (s->bottom_field == !s->interlace_polarity)
1553 *picture = *s->picture_ptr;
1557 picture->quality = FFMAX3(s->qscale[0],
1560 picture->qstride = 0;
1561 picture->qscale_table = s->qscale_table;
1562 memset(picture->qscale_table, picture->quality,
1563 (s->width + 15) / 16);
1564 if (avctx->debug & FF_DEBUG_QP)
1565 av_log(avctx, AV_LOG_DEBUG,
1566 "QP: %d\n", picture->quality);
1567 picture->quality *= FF_QP2LAMBDA;
1572 if (!s->got_picture) {
1573 av_log(avctx, AV_LOG_WARNING,
1574 "Can not process SOS before SOF, skipping\n");
1577 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1578 (avctx->err_recognition & AV_EF_EXPLODE))
1580 /* buggy avid puts EOI every 10-20th frame */
1581 /* if restart period is over process EOI */
1582 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1586 mjpeg_decode_dri(s);
1598 av_log(avctx, AV_LOG_ERROR,
1599 "mjpeg: unsupported coding type (%x)\n", start_code);
1604 /* eof process start code */
1605 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1606 av_log(avctx, AV_LOG_DEBUG,
1607 "marker parser used %d bytes (%d bits)\n",
1608 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1611 if (s->got_picture) {
1612 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1615 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1616 return AVERROR_INVALIDDATA;
1618 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n",
1620 // return buf_end - buf_ptr;
1621 return buf_ptr - buf;
1624 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1626 MJpegDecodeContext *s = avctx->priv_data;
1629 if (s->picture_ptr && s->picture_ptr->data[0])
1630 avctx->release_buffer(avctx, s->picture_ptr);
1633 av_free(s->qscale_table);
1634 av_freep(&s->ljpeg_buffer);
1635 s->ljpeg_buffer_size = 0;
1637 for (i = 0; i < 3; i++) {
1638 for (j = 0; j < 4; j++)
1639 ff_free_vlc(&s->vlcs[i][j]);
1641 for (i = 0; i < MAX_COMPONENTS; i++) {
1642 av_freep(&s->blocks[i]);
1643 av_freep(&s->last_nnz[i]);
1648 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1649 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1650 static const AVOption options[] = {
1651 { "extern_huff", "Use external huffman table.",
1652 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
1656 static const AVClass mjpegdec_class = {
1657 .class_name = "MJPEG decoder",
1658 .item_name = av_default_item_name,
1660 .version = LIBAVUTIL_VERSION_INT,
1663 AVCodec ff_mjpeg_decoder = {
1665 .type = AVMEDIA_TYPE_VIDEO,
1666 .id = AV_CODEC_ID_MJPEG,
1667 .priv_data_size = sizeof(MJpegDecodeContext),
1668 .init = ff_mjpeg_decode_init,
1669 .close = ff_mjpeg_decode_end,
1670 .decode = ff_mjpeg_decode_frame,
1671 .capabilities = CODEC_CAP_DR1,
1672 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1673 .priv_class = &mjpegdec_class,
1676 AVCodec ff_thp_decoder = {
1678 .type = AVMEDIA_TYPE_VIDEO,
1679 .id = AV_CODEC_ID_THP,
1680 .priv_data_size = sizeof(MJpegDecodeContext),
1681 .init = ff_mjpeg_decode_init,
1682 .close = ff_mjpeg_decode_end,
1683 .decode = ff_mjpeg_decode_frame,
1684 .capabilities = CODEC_CAP_DR1,
1685 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),