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"
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], ff_mjpeg_bits_dc_luminance,
71 ff_mjpeg_val_dc, 12, 0, 0);
72 build_vlc(&s->vlcs[0][1], ff_mjpeg_bits_dc_chrominance,
73 ff_mjpeg_val_dc, 12, 0, 0);
74 build_vlc(&s->vlcs[1][0], ff_mjpeg_bits_ac_luminance,
75 ff_mjpeg_val_ac_luminance, 251, 0, 1);
76 build_vlc(&s->vlcs[1][1], ff_mjpeg_bits_ac_chrominance,
77 ff_mjpeg_val_ac_chrominance, 251, 0, 1);
78 build_vlc(&s->vlcs[2][0], ff_mjpeg_bits_ac_luminance,
79 ff_mjpeg_val_ac_luminance, 251, 0, 0);
80 build_vlc(&s->vlcs[2][1], ff_mjpeg_bits_ac_chrominance,
81 ff_mjpeg_val_ac_chrominance, 251, 0, 0);
84 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
86 MJpegDecodeContext *s = avctx->priv_data;
89 s->picture_ptr = &s->picture;
92 ff_dsputil_init(&s->dsp, avctx);
93 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
98 s->org_height = avctx->coded_height;
99 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
101 build_basic_mjpeg_vlc(s);
103 if (s->extern_huff) {
105 av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
106 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
107 if ((ret = ff_mjpeg_decode_dht(s))) {
108 av_log(avctx, AV_LOG_ERROR,
109 "mjpeg: error using external huffman table\n");
113 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
114 s->interlace_polarity = 1; /* bottom field first */
115 av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
117 if (avctx->codec->id == AV_CODEC_ID_AMV)
124 /* quantize tables */
125 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
127 int len, index, i, j;
129 len = get_bits(&s->gb, 16) - 2;
132 /* only 8 bit precision handled */
133 if (get_bits(&s->gb, 4) != 0) {
134 av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
137 index = get_bits(&s->gb, 4);
140 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
141 /* read quant table */
142 for (i = 0; i < 64; i++) {
143 j = s->scantable.permutated[i];
144 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
147 // XXX FIXME finetune, and perhaps add dc too
148 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
149 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
150 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
151 index, s->qscale[index]);
157 /* decode huffman tables and build VLC decoders */
158 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
160 int len, index, i, class, n, v, code_max;
161 uint8_t bits_table[17];
162 uint8_t val_table[256];
165 len = get_bits(&s->gb, 16) - 2;
169 return AVERROR_INVALIDDATA;
170 class = get_bits(&s->gb, 4);
172 return AVERROR_INVALIDDATA;
173 index = get_bits(&s->gb, 4);
175 return AVERROR_INVALIDDATA;
177 for (i = 1; i <= 16; i++) {
178 bits_table[i] = get_bits(&s->gb, 8);
182 if (len < n || n > 256)
183 return AVERROR_INVALIDDATA;
186 for (i = 0; i < n; i++) {
187 v = get_bits(&s->gb, 8);
194 /* build VLC and flush previous vlc if present */
195 ff_free_vlc(&s->vlcs[class][index]);
196 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
197 class, index, code_max + 1);
198 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
199 code_max + 1, 0, class > 0)) < 0)
203 ff_free_vlc(&s->vlcs[2][index]);
204 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
205 code_max + 1, 0, 0)) < 0)
212 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
214 int len, nb_components, i, width, height, pix_fmt_id;
216 /* XXX: verify len field validity */
217 len = get_bits(&s->gb, 16);
218 s->bits = get_bits(&s->gb, 8);
222 if (s->bits == 9 && !s->pegasus_rct)
223 s->rct = 1; // FIXME ugly
225 if (s->bits != 8 && !s->lossless) {
226 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
230 height = get_bits(&s->gb, 16);
231 width = get_bits(&s->gb, 16);
233 // HACK for odd_height.mov
234 if (s->interlaced && s->width == width && s->height == height + 1)
237 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
238 if (av_image_check_size(width, height, 0, s->avctx))
239 return AVERROR_INVALIDDATA;
241 nb_components = get_bits(&s->gb, 8);
242 if (nb_components <= 0 ||
243 nb_components > MAX_COMPONENTS)
245 if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
246 av_log_missing_feature(s->avctx,
247 "only <= 8 bits/component or "
248 "16-bit gray accepted for JPEG-LS\n", 0);
249 return AVERROR_PATCHWELCOME;
251 s->nb_components = nb_components;
254 for (i = 0; i < nb_components; i++) {
256 s->component_id[i] = get_bits(&s->gb, 8) - 1;
257 s->h_count[i] = get_bits(&s->gb, 4);
258 s->v_count[i] = get_bits(&s->gb, 4);
259 /* compute hmax and vmax (only used in interleaved case) */
260 if (s->h_count[i] > s->h_max)
261 s->h_max = s->h_count[i];
262 if (s->v_count[i] > s->v_max)
263 s->v_max = s->v_count[i];
264 s->quant_index[i] = get_bits(&s->gb, 8);
265 if (s->quant_index[i] >= 4)
266 return AVERROR_INVALIDDATA;
267 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
268 i, s->h_count[i], s->v_count[i],
269 s->component_id[i], s->quant_index[i]);
272 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
273 av_log_missing_feature(s->avctx,
274 "Subsampling in JPEG-LS is not supported.\n", 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 = PIX_FMT_BGRA;
326 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
327 assert(s->nb_components == 3);
330 s->avctx->pix_fmt = PIX_FMT_GRAY8;
333 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV440P : PIX_FMT_YUVJ440P;
336 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
339 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : 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 = PIX_FMT_RGB24;
348 else if (s->bits <= 8)
349 s->avctx->pix_fmt = PIX_FMT_GRAY8;
351 s->avctx->pix_fmt = PIX_FMT_GRAY16;
354 if (s->picture_ptr->data[0])
355 s->avctx->release_buffer(s->avctx, s->picture_ptr);
357 if (s->avctx->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 // printf("%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_log(s->avctx, AV_LOG_DEBUG, "mb: %d %d processed\n",
897 // av_log(NULL, AV_LOG_DEBUG, "%d %d %d %d %d %d %d %d \n",
898 // mb_x, mb_y, x, y, c, s->bottom_field,
899 // (v * mb_y + y) * 8, (h * mb_x + x) * 8);
907 if (s->restart_interval) {
909 i = 8 + ((-get_bits_count(&s->gb)) & 7);
911 if (show_bits(&s->gb, i) == (1 << i) - 1) {
912 int pos = get_bits_count(&s->gb);
913 align_get_bits(&s->gb);
914 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
915 skip_bits(&s->gb, 8);
916 if ((get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
917 for (i = 0; i < nb_components; i++) /* reset dc */
918 s->last_dc[i] = 1024;
920 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
928 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
929 int se, int Ah, int Al,
930 const uint8_t *mb_bitmask,
931 const AVFrame *reference)
935 int c = s->comp_index[0];
936 uint8_t *data = s->picture_ptr->data[c];
937 const uint8_t *reference_data = reference ? reference->data[c] : NULL;
938 int linesize = s->linesize[c];
940 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
941 GetBitContext mb_bitmask_gb;
944 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
947 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
948 last_scan = !~s->coefs_finished[c];
951 if (s->interlaced && s->bottom_field) {
952 int offset = linesize >> 1;
954 reference_data += offset;
957 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
958 int block_offset = mb_y * linesize * 8;
959 uint8_t *ptr = data + block_offset;
960 int block_idx = mb_y * s->block_stride[c];
961 DCTELEM (*block)[64] = &s->blocks[c][block_idx];
962 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
963 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
964 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
969 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
970 quant_matrix, ss, se, Al, &EOBRUN);
972 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
973 quant_matrix, ss, se, Al, &EOBRUN);
975 av_log(s->avctx, AV_LOG_ERROR,
976 "error y=%d x=%d\n", mb_y, mb_x);
977 return AVERROR_INVALIDDATA;
983 copy_block8(ptr, reference_data + block_offset,
984 linesize, linesize, 8);
986 s->dsp.idct_put(ptr, linesize, *block);
995 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
996 const AVFrame *reference)
998 int len, nb_components, i, h, v, predictor, point_transform;
1000 const int block_size = s->lossless ? 1 : 8;
1001 int ilv, prev_shift;
1003 /* XXX: verify len field validity */
1004 len = get_bits(&s->gb, 16);
1005 nb_components = get_bits(&s->gb, 8);
1006 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1007 av_log(s->avctx, AV_LOG_ERROR,
1008 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1009 return AVERROR_PATCHWELCOME;
1011 if (len != 6 + 2 * nb_components) {
1012 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1013 return AVERROR_INVALIDDATA;
1015 for (i = 0; i < nb_components; i++) {
1016 id = get_bits(&s->gb, 8) - 1;
1017 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1018 /* find component index */
1019 for (index = 0; index < s->nb_components; index++)
1020 if (id == s->component_id[index])
1022 if (index == s->nb_components) {
1023 av_log(s->avctx, AV_LOG_ERROR,
1024 "decode_sos: index(%d) out of components\n", index);
1025 return AVERROR_INVALIDDATA;
1027 /* Metasoft MJPEG codec has Cb and Cr swapped */
1028 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1029 && nb_components == 3 && s->nb_components == 3 && i)
1032 s->comp_index[i] = index;
1034 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1035 s->h_scount[i] = s->h_count[index];
1036 s->v_scount[i] = s->v_count[index];
1038 s->dc_index[i] = get_bits(&s->gb, 4);
1039 s->ac_index[i] = get_bits(&s->gb, 4);
1041 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1042 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1044 if (!s->vlcs[0][s->dc_index[i]].table ||
1045 !s->vlcs[1][s->ac_index[i]].table)
1049 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1050 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1051 prev_shift = get_bits(&s->gb, 4); /* Ah */
1052 point_transform = get_bits(&s->gb, 4); /* Al */
1054 for (i = 0; i < nb_components; i++)
1055 s->last_dc[i] = 1024;
1057 if (nb_components > 1) {
1058 /* interleaved stream */
1059 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1060 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1061 } else if (!s->ls) { /* skip this for JPEG-LS */
1062 h = s->h_max / s->h_scount[0];
1063 v = s->v_max / s->v_scount[0];
1064 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1065 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1066 s->nb_blocks[0] = 1;
1071 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1072 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n",
1073 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1074 predictor, point_transform, ilv, s->bits,
1075 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
1078 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1079 for (i = s->mjpb_skiptosod; i > 0; i--)
1080 skip_bits(&s->gb, 8);
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)
1119 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1120 return AVERROR_INVALIDDATA;
1123 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1125 if (get_bits(&s->gb, 16) != 4)
1126 return AVERROR_INVALIDDATA;
1127 s->restart_interval = get_bits(&s->gb, 16);
1128 s->restart_count = 0;
1129 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1130 s->restart_interval);
1135 static int mjpeg_decode_app(MJpegDecodeContext *s)
1139 len = get_bits(&s->gb, 16);
1141 return AVERROR_INVALIDDATA;
1142 if (8 * len > get_bits_left(&s->gb))
1143 return AVERROR_INVALIDDATA;
1145 id = get_bits_long(&s->gb, 32);
1146 id = av_be2ne32(id);
1149 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1150 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1152 /* Buggy AVID, it puts EOI only at every 10th frame. */
1153 /* Also, this fourcc is used by non-avid files too, it holds some
1154 information, but it's always present in AVID-created files. */
1155 if (id == AV_RL32("AVI1")) {
1161 4bytes field_size_less_padding
1164 // if (s->first_picture)
1165 // printf("mjpeg: workarounding buggy AVID\n");
1166 i = get_bits(&s->gb, 8);
1168 s->bottom_field = 1;
1170 s->bottom_field = 0;
1172 skip_bits(&s->gb, 8);
1173 skip_bits(&s->gb, 32);
1174 skip_bits(&s->gb, 32);
1177 // if (s->interlace_polarity)
1178 // printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
1184 if (id == AV_RL32("JFIF")) {
1185 int t_w, t_h, v1, v2;
1186 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1187 v1 = get_bits(&s->gb, 8);
1188 v2 = get_bits(&s->gb, 8);
1189 skip_bits(&s->gb, 8);
1191 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1192 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1194 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1195 av_log(s->avctx, AV_LOG_INFO,
1196 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1198 s->avctx->sample_aspect_ratio.num,
1199 s->avctx->sample_aspect_ratio.den);
1201 t_w = get_bits(&s->gb, 8);
1202 t_h = get_bits(&s->gb, 8);
1204 /* skip thumbnail */
1205 if (len -10 - (t_w * t_h * 3) > 0)
1206 len -= t_w * t_h * 3;
1212 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1213 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1214 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1215 skip_bits(&s->gb, 16); /* version */
1216 skip_bits(&s->gb, 16); /* flags0 */
1217 skip_bits(&s->gb, 16); /* flags1 */
1218 skip_bits(&s->gb, 8); /* transform */
1223 if (id == AV_RL32("LJIF")) {
1224 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1225 av_log(s->avctx, AV_LOG_INFO,
1226 "Pegasus lossless jpeg header found\n");
1227 skip_bits(&s->gb, 16); /* version ? */
1228 skip_bits(&s->gb, 16); /* unknwon always 0? */
1229 skip_bits(&s->gb, 16); /* unknwon always 0? */
1230 skip_bits(&s->gb, 16); /* unknwon always 0? */
1231 switch (get_bits(&s->gb, 8)) {
1241 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1248 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1249 id = get_bits_long(&s->gb, 32);
1250 id = av_be2ne32(id);
1253 if (id == AV_RL32("mjpg")) {
1255 skip_bits(&s->gb, 32); /* field size */
1256 skip_bits(&s->gb, 32); /* pad field size */
1257 skip_bits(&s->gb, 32); /* next off */
1258 skip_bits(&s->gb, 32); /* quant off */
1259 skip_bits(&s->gb, 32); /* huff off */
1260 skip_bits(&s->gb, 32); /* image off */
1261 skip_bits(&s->gb, 32); /* scan off */
1262 skip_bits(&s->gb, 32); /* data off */
1264 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1265 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1270 /* slow but needed for extreme adobe jpegs */
1272 av_log(s->avctx, AV_LOG_ERROR,
1273 "mjpeg: error, decode_app parser read over the end\n");
1275 skip_bits(&s->gb, 8);
1280 static int mjpeg_decode_com(MJpegDecodeContext *s)
1282 int len = get_bits(&s->gb, 16);
1283 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1284 char *cbuf = av_malloc(len - 1);
1287 for (i = 0; i < len - 2; i++)
1288 cbuf[i] = get_bits(&s->gb, 8);
1289 if (i > 0 && cbuf[i - 1] == '\n')
1294 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1295 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1297 /* buggy avid, it puts EOI only at every 10th frame */
1298 if (!strcmp(cbuf, "AVID")) {
1300 // if (s->first_picture)
1301 // printf("mjpeg: workarounding buggy AVID\n");
1302 } else if (!strcmp(cbuf, "CS=ITU601"))
1304 else if ((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
1305 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1315 /* return the 8 bit start code value and update the search
1316 state. Return -1 if no start code found */
1317 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1319 const uint8_t *buf_ptr;
1326 buf_ptr = *pbuf_ptr;
1327 while (buf_ptr < buf_end) {
1330 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1340 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1341 *pbuf_ptr = buf_ptr;
1345 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1346 const uint8_t **buf_ptr, const uint8_t *buf_end,
1347 const uint8_t **unescaped_buf_ptr,
1348 int *unescaped_buf_size)
1351 start_code = find_marker(buf_ptr, buf_end);
1353 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1355 return AVERROR(ENOMEM);
1357 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1358 if (start_code == SOS && !s->ls) {
1359 const uint8_t *src = *buf_ptr;
1360 uint8_t *dst = s->buffer;
1362 while (src < buf_end) {
1363 uint8_t x = *(src++);
1366 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1368 while (src < buf_end && x == 0xff)
1371 if (x >= 0xd0 && x <= 0xd7)
1378 *unescaped_buf_ptr = s->buffer;
1379 *unescaped_buf_size = dst - s->buffer;
1381 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1382 (buf_end - *buf_ptr) - (dst - s->buffer));
1383 } else if (start_code == SOS && s->ls) {
1384 const uint8_t *src = *buf_ptr;
1385 uint8_t *dst = s->buffer;
1393 while (src + t < buf_end) {
1394 uint8_t x = src[t++];
1396 while ((src + t < buf_end) && x == 0xff)
1405 init_put_bits(&pb, dst, t);
1407 /* unescape bitstream */
1409 uint8_t x = src[b++];
1410 put_bits(&pb, 8, x);
1413 put_bits(&pb, 7, x);
1417 flush_put_bits(&pb);
1419 *unescaped_buf_ptr = dst;
1420 *unescaped_buf_size = (bit_count + 7) >> 3;
1422 *unescaped_buf_ptr = *buf_ptr;
1423 *unescaped_buf_size = buf_end - *buf_ptr;
1429 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
1432 const uint8_t *buf = avpkt->data;
1433 int buf_size = avpkt->size;
1434 MJpegDecodeContext *s = avctx->priv_data;
1435 const uint8_t *buf_end, *buf_ptr;
1436 const uint8_t *unescaped_buf_ptr;
1437 int unescaped_buf_size;
1440 AVFrame *picture = data;
1442 s->got_picture = 0; // picture from previous image can not be reused
1444 buf_end = buf + buf_size;
1445 while (buf_ptr < buf_end) {
1446 /* find start next marker */
1447 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1449 &unescaped_buf_size);
1451 if (start_code < 0) {
1453 } else if (unescaped_buf_size > (1U<<29)) {
1454 av_log(avctx, AV_LOG_ERROR, "MJPEG packet 0x%x too big (0x%x/0x%x), corrupt data?\n",
1455 start_code, unescaped_buf_size, buf_size);
1456 return AVERROR_INVALIDDATA;
1458 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1459 start_code, buf_end - buf_ptr);
1461 init_get_bits(&s->gb, unescaped_buf_ptr, unescaped_buf_size * 8);
1463 s->start_code = start_code;
1464 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1465 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1467 /* process markers */
1468 if (start_code >= 0xd0 && start_code <= 0xd7)
1469 av_log(avctx, AV_LOG_DEBUG,
1470 "restart marker: %d\n", start_code & 0x0f);
1472 else if (start_code >= APP0 && start_code <= APP15)
1473 mjpeg_decode_app(s);
1475 else if (start_code == COM)
1476 mjpeg_decode_com(s);
1478 switch (start_code) {
1480 s->restart_interval = 0;
1481 s->restart_count = 0;
1482 /* nothing to do on SOI */
1485 ff_mjpeg_decode_dqt(s);
1488 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1489 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1498 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1505 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1512 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1519 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1523 if (!CONFIG_JPEGLS_DECODER ||
1524 (ret = ff_jpegls_decode_lse(s)) < 0)
1529 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1532 if (!s->got_picture) {
1533 av_log(avctx, AV_LOG_WARNING,
1534 "Found EOI before any SOF, ignoring\n");
1537 if (s->interlaced) {
1538 s->bottom_field ^= 1;
1539 /* if not bottom field, do not output image yet */
1540 if (s->bottom_field == !s->interlace_polarity)
1543 *picture = *s->picture_ptr;
1544 *data_size = sizeof(AVFrame);
1547 picture->quality = FFMAX3(s->qscale[0],
1550 picture->qstride = 0;
1551 picture->qscale_table = s->qscale_table;
1552 memset(picture->qscale_table, picture->quality,
1553 (s->width + 15) / 16);
1554 if (avctx->debug & FF_DEBUG_QP)
1555 av_log(avctx, AV_LOG_DEBUG,
1556 "QP: %d\n", picture->quality);
1557 picture->quality *= FF_QP2LAMBDA;
1562 if (!s->got_picture) {
1563 av_log(avctx, AV_LOG_WARNING,
1564 "Can not process SOS before SOF, skipping\n");
1567 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1568 (avctx->err_recognition & AV_EF_EXPLODE))
1570 /* buggy avid puts EOI every 10-20th frame */
1571 /* if restart period is over process EOI */
1572 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1576 mjpeg_decode_dri(s);
1588 av_log(avctx, AV_LOG_ERROR,
1589 "mjpeg: unsupported coding type (%x)\n", start_code);
1592 // printf("mjpeg: unsupported marker (%x)\n", start_code);
1597 /* eof process start code */
1598 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1599 av_log(avctx, AV_LOG_DEBUG,
1600 "marker parser used %d bytes (%d bits)\n",
1601 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1604 if (s->got_picture) {
1605 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1608 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1609 return AVERROR_INVALIDDATA;
1611 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n",
1613 // return buf_end - buf_ptr;
1614 return buf_ptr - buf;
1617 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1619 MJpegDecodeContext *s = avctx->priv_data;
1622 if (s->picture_ptr && s->picture_ptr->data[0])
1623 avctx->release_buffer(avctx, s->picture_ptr);
1626 av_free(s->qscale_table);
1627 av_freep(&s->ljpeg_buffer);
1628 s->ljpeg_buffer_size = 0;
1630 for (i = 0; i < 3; i++) {
1631 for (j = 0; j < 4; j++)
1632 ff_free_vlc(&s->vlcs[i][j]);
1634 for (i = 0; i < MAX_COMPONENTS; i++) {
1635 av_freep(&s->blocks[i]);
1636 av_freep(&s->last_nnz[i]);
1641 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1642 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1643 static const AVOption options[] = {
1644 { "extern_huff", "Use external huffman table.",
1645 OFFSET(extern_huff), AV_OPT_TYPE_INT, { 0 }, 0, 1, VD },
1649 static const AVClass mjpegdec_class = {
1650 .class_name = "MJPEG decoder",
1651 .item_name = av_default_item_name,
1653 .version = LIBAVUTIL_VERSION_INT,
1656 AVCodec ff_mjpeg_decoder = {
1658 .type = AVMEDIA_TYPE_VIDEO,
1659 .id = AV_CODEC_ID_MJPEG,
1660 .priv_data_size = sizeof(MJpegDecodeContext),
1661 .init = ff_mjpeg_decode_init,
1662 .close = ff_mjpeg_decode_end,
1663 .decode = ff_mjpeg_decode_frame,
1664 .capabilities = CODEC_CAP_DR1,
1665 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1666 .priv_class = &mjpegdec_class,
1669 AVCodec ff_thp_decoder = {
1671 .type = AVMEDIA_TYPE_VIDEO,
1672 .id = AV_CODEC_ID_THP,
1673 .priv_data_size = sizeof(MJpegDecodeContext),
1674 .init = ff_mjpeg_decode_init,
1675 .close = ff_mjpeg_decode_end,
1676 .decode = ff_mjpeg_decode_frame,
1677 .capabilities = CODEC_CAP_DR1,
1678 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),