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 "jpeglsdec.h"
44 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
45 const uint8_t *val_table, int nb_codes,
46 int use_static, int is_ac)
48 uint8_t huff_size[256] = { 0 };
49 uint16_t huff_code[256];
50 uint16_t huff_sym[256];
53 assert(nb_codes <= 256);
55 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
57 for (i = 0; i < 256; i++)
58 huff_sym[i] = i + 16 * is_ac;
61 huff_sym[0] = 16 * 256;
63 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
64 huff_code, 2, 2, huff_sym, 2, 2, use_static);
67 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
69 build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
70 avpriv_mjpeg_val_dc, 12, 0, 0);
71 build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
72 avpriv_mjpeg_val_dc, 12, 0, 0);
73 build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
74 avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
75 build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
76 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
77 build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
78 avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
79 build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
80 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
83 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
85 MJpegDecodeContext *s = avctx->priv_data;
88 s->picture_ptr = &s->picture;
91 ff_hpeldsp_init(&s->hdsp, avctx->flags);
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->interlaced && (s->bottom_field == !s->interlace_polarity)) {
246 if (nb_components != s->nb_components) {
247 av_log(s->avctx, AV_LOG_ERROR,
248 "nb_components changing in interlaced picture\n");
249 return AVERROR_INVALIDDATA;
252 if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
253 avpriv_report_missing_feature(s->avctx,
254 "JPEG-LS that is not <= 8 "
255 "bits/component or 16-bit gray");
256 return AVERROR_PATCHWELCOME;
258 s->nb_components = nb_components;
261 for (i = 0; i < nb_components; i++) {
263 s->component_id[i] = get_bits(&s->gb, 8) - 1;
264 s->h_count[i] = get_bits(&s->gb, 4);
265 s->v_count[i] = get_bits(&s->gb, 4);
266 /* compute hmax and vmax (only used in interleaved case) */
267 if (s->h_count[i] > s->h_max)
268 s->h_max = s->h_count[i];
269 if (s->v_count[i] > s->v_max)
270 s->v_max = s->v_count[i];
271 s->quant_index[i] = get_bits(&s->gb, 8);
272 if (s->quant_index[i] >= 4)
273 return AVERROR_INVALIDDATA;
274 if (!s->h_count[i] || !s->v_count[i]) {
275 av_log(s->avctx, AV_LOG_ERROR,
276 "Invalid sampling factor in component %d %d:%d\n",
277 i, s->h_count[i], s->v_count[i]);
278 return AVERROR_INVALIDDATA;
281 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
282 i, s->h_count[i], s->v_count[i],
283 s->component_id[i], s->quant_index[i]);
286 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
287 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
288 return AVERROR_PATCHWELCOME;
291 if (s->v_max == 1 && s->h_max == 1 && s->lossless == 1)
294 /* if different size, realloc/alloc picture */
295 /* XXX: also check h_count and v_count */
296 if (width != s->width || height != s->height) {
301 /* test interlaced mode */
302 if (s->first_picture &&
303 s->org_height != 0 &&
304 s->height < ((s->org_height * 3) / 4)) {
306 s->bottom_field = s->interlace_polarity;
307 s->picture_ptr->interlaced_frame = 1;
308 s->picture_ptr->top_field_first = !s->interlace_polarity;
312 avcodec_set_dimensions(s->avctx, width, height);
314 s->first_picture = 0;
317 if (!(s->interlaced && (s->bottom_field == !s->interlace_polarity))) {
318 /* XXX: not complete test ! */
319 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
320 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
321 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
322 (s->h_count[3] << 4) | s->v_count[3];
323 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
324 /* NOTE we do not allocate pictures large enough for the possible
325 * padding of h/v_count being 4 */
326 if (!(pix_fmt_id & 0xD0D0D0D0))
327 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
328 if (!(pix_fmt_id & 0x0D0D0D0D))
329 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
331 switch (pix_fmt_id) {
334 s->avctx->pix_fmt = AV_PIX_FMT_BGRA;
336 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
337 assert(s->nb_components == 3);
340 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
343 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
346 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
349 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
352 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
353 return AVERROR_PATCHWELCOME;
356 if (s->nb_components > 1)
357 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
358 else if (s->bits <= 8)
359 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
361 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
364 av_frame_unref(s->picture_ptr);
365 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0) {
366 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
369 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
370 s->picture_ptr->key_frame = 1;
373 for (i = 0; i < 3; i++)
374 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
376 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
377 s->width, s->height, s->linesize[0], s->linesize[1],
378 s->interlaced, s->avctx->height);
380 if (len != (8 + (3 * nb_components)))
381 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
384 /* totally blank picture as progressive JPEG will only add details to it */
385 if (s->progressive) {
386 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
387 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
388 for (i = 0; i < s->nb_components; i++) {
389 int size = bw * bh * s->h_count[i] * s->v_count[i];
390 av_freep(&s->blocks[i]);
391 av_freep(&s->last_nnz[i]);
392 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
393 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
394 s->block_stride[i] = bw * s->h_count[i];
396 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
401 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
404 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
406 av_log(s->avctx, AV_LOG_WARNING,
407 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
408 0, dc_index, &s->vlcs[0][dc_index]);
413 return get_xbits(&s->gb, code);
418 /* decode block and dequantize */
419 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
420 int dc_index, int ac_index, int16_t *quant_matrix)
422 int code, i, j, level, val;
425 val = mjpeg_decode_dc(s, dc_index);
427 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
428 return AVERROR_INVALIDDATA;
430 val = val * quant_matrix[0] + s->last_dc[component];
431 s->last_dc[component] = val;
435 {OPEN_READER(re, &s->gb);
437 UPDATE_CACHE(re, &s->gb);
438 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
440 i += ((unsigned)code) >> 4;
443 if (code > MIN_CACHE_BITS - 16)
444 UPDATE_CACHE(re, &s->gb);
447 int cache = GET_CACHE(re, &s->gb);
448 int sign = (~cache) >> 31;
449 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
452 LAST_SKIP_BITS(re, &s->gb, code);
455 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
456 return AVERROR_INVALIDDATA;
458 j = s->scantable.permutated[i];
459 block[j] = level * quant_matrix[j];
462 CLOSE_READER(re, &s->gb);}
467 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
468 int component, int dc_index,
469 int16_t *quant_matrix, int Al)
472 s->dsp.clear_block(block);
473 val = mjpeg_decode_dc(s, dc_index);
475 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
476 return AVERROR_INVALIDDATA;
478 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
479 s->last_dc[component] = val;
484 /* decode block and dequantize - progressive JPEG version */
485 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
486 uint8_t *last_nnz, int ac_index,
487 int16_t *quant_matrix,
488 int ss, int se, int Al, int *EOBRUN)
490 int code, i, j, level, val, run;
498 OPEN_READER(re, &s->gb);
499 for (i = ss; ; i++) {
500 UPDATE_CACHE(re, &s->gb);
501 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
503 run = ((unsigned) code) >> 4;
507 if (code > MIN_CACHE_BITS - 16)
508 UPDATE_CACHE(re, &s->gb);
511 int cache = GET_CACHE(re, &s->gb);
512 int sign = (~cache) >> 31;
513 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
516 LAST_SKIP_BITS(re, &s->gb, code);
520 j = s->scantable.permutated[se];
521 block[j] = level * quant_matrix[j] << Al;
524 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
525 return AVERROR_INVALIDDATA;
527 j = s->scantable.permutated[i];
528 block[j] = level * quant_matrix[j] << Al;
530 if (run == 0xF) {// ZRL - skip 15 coefficients
533 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
534 return AVERROR_INVALIDDATA;
539 UPDATE_CACHE(re, &s->gb);
540 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
541 LAST_SKIP_BITS(re, &s->gb, run);
548 CLOSE_READER(re, &s->gb);
557 #define REFINE_BIT(j) { \
558 UPDATE_CACHE(re, &s->gb); \
559 sign = block[j] >> 15; \
560 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
561 ((quant_matrix[j] ^ sign) - sign) << Al; \
562 LAST_SKIP_BITS(re, &s->gb, 1); \
570 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
575 j = s->scantable.permutated[i]; \
578 else if (run-- == 0) \
582 /* decode block and dequantize - progressive JPEG refinement pass */
583 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
585 int ac_index, int16_t *quant_matrix,
586 int ss, int se, int Al, int *EOBRUN)
588 int code, i = ss, j, sign, val, run;
589 int last = FFMIN(se, *last_nnz);
591 OPEN_READER(re, &s->gb);
596 UPDATE_CACHE(re, &s->gb);
597 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
600 run = ((unsigned) code) >> 4;
601 UPDATE_CACHE(re, &s->gb);
602 val = SHOW_UBITS(re, &s->gb, 1);
603 LAST_SKIP_BITS(re, &s->gb, 1);
605 j = s->scantable.permutated[i];
607 block[j] = ((quant_matrix[j]^val) - val) << Al;
611 CLOSE_READER(re, &s->gb);
615 run = ((unsigned) code) >> 4;
622 UPDATE_CACHE(re, &s->gb);
623 run += SHOW_UBITS(re, &s->gb, val);
624 LAST_SKIP_BITS(re, &s->gb, val);
636 for (; i <= last; i++) {
637 j = s->scantable.permutated[i];
641 CLOSE_READER(re, &s->gb);
648 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor,
652 uint16_t (*buffer)[4];
653 int left[3], top[3], topleft[3];
654 const int linesize = s->linesize[0];
655 const int mask = (1 << s->bits) - 1;
657 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
658 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
659 buffer = s->ljpeg_buffer;
661 for (i = 0; i < 3; i++)
662 buffer[0][i] = 1 << (s->bits + point_transform - 1);
664 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
665 const int modified_predictor = mb_y ? predictor : 1;
666 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
668 if (s->interlaced && s->bottom_field)
669 ptr += linesize >> 1;
671 for (i = 0; i < 3; i++)
672 top[i] = left[i] = topleft[i] = buffer[0][i];
674 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
675 if (s->restart_interval && !s->restart_count)
676 s->restart_count = s->restart_interval;
678 for (i = 0; i < 3; i++) {
682 top[i] = buffer[mb_x][i];
684 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
686 left[i] = buffer[mb_x][i] =
687 mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
690 if (s->restart_interval && !--s->restart_count) {
691 align_get_bits(&s->gb);
692 skip_bits(&s->gb, 16); /* skip RSTn */
697 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
698 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
699 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
700 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
702 } else if (s->pegasus_rct) {
703 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
704 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
705 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
706 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
709 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
710 ptr[4 * mb_x + 0] = buffer[mb_x][2];
711 ptr[4 * mb_x + 1] = buffer[mb_x][1];
712 ptr[4 * mb_x + 2] = buffer[mb_x][0];
719 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
720 int point_transform, int nb_components)
724 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
725 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
726 if (s->restart_interval && !s->restart_count)
727 s->restart_count = s->restart_interval;
729 if (mb_x == 0 || mb_y == 0 || s->interlaced) {
730 for (i = 0; i < nb_components; i++) {
732 int n, h, v, x, y, c, j, linesize;
734 c = s->comp_index[i];
739 linesize = s->linesize[c];
741 for (j = 0; j < n; j++) {
743 // FIXME optimize this crap
744 ptr = s->picture_ptr->data[c] +
745 (linesize * (v * mb_y + y)) +
747 if (y == 0 && mb_y == 0) {
748 if (x == 0 && mb_x == 0)
749 pred = 128 << point_transform;
753 if (x == 0 && mb_x == 0)
754 pred = ptr[-linesize];
756 PREDICT(pred, ptr[-linesize - 1],
757 ptr[-linesize], ptr[-1], predictor);
760 if (s->interlaced && s->bottom_field)
761 ptr += linesize >> 1;
762 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
771 for (i = 0; i < nb_components; i++) {
773 int n, h, v, x, y, c, j, linesize;
775 c = s->comp_index[i];
780 linesize = s->linesize[c];
782 for (j = 0; j < n; j++) {
785 // FIXME optimize this crap
786 ptr = s->picture_ptr->data[c] +
787 (linesize * (v * mb_y + y)) +
789 PREDICT(pred, ptr[-linesize - 1],
790 ptr[-linesize], ptr[-1], predictor);
791 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
799 if (s->restart_interval && !--s->restart_count) {
800 align_get_bits(&s->gb);
801 skip_bits(&s->gb, 16); /* skip RSTn */
808 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
809 int Al, const uint8_t *mb_bitmask,
810 const AVFrame *reference)
813 uint8_t *data[MAX_COMPONENTS];
814 const uint8_t *reference_data[MAX_COMPONENTS];
815 int linesize[MAX_COMPONENTS];
816 GetBitContext mb_bitmask_gb;
819 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
821 if (s->flipped && s->avctx->flags & CODEC_FLAG_EMU_EDGE) {
822 av_log(s->avctx, AV_LOG_ERROR,
823 "Can not flip image with CODEC_FLAG_EMU_EDGE set!\n");
827 for (i = 0; i < nb_components; i++) {
828 int c = s->comp_index[i];
829 data[c] = s->picture_ptr->data[c];
830 reference_data[c] = reference ? reference->data[c] : NULL;
831 linesize[c] = s->linesize[c];
832 s->coefs_finished[c] |= 1;
834 // picture should be flipped upside-down for this codec
835 int offset = (linesize[c] * (s->v_scount[i] *
836 (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
838 reference_data[c] += offset;
843 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
844 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
845 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
847 if (s->restart_interval && !s->restart_count)
848 s->restart_count = s->restart_interval;
850 if (get_bits_left(&s->gb) < 0) {
851 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
852 -get_bits_left(&s->gb));
853 return AVERROR_INVALIDDATA;
855 for (i = 0; i < nb_components; i++) {
857 int n, h, v, x, y, c, j;
860 c = s->comp_index[i];
865 for (j = 0; j < n; j++) {
866 block_offset = ((linesize[c] * (v * mb_y + y) * 8) +
869 if (s->interlaced && s->bottom_field)
870 block_offset += linesize[c] >> 1;
871 ptr = data[c] + block_offset;
872 if (!s->progressive) {
874 s->hdsp.put_pixels_tab[1][0](ptr,
875 reference_data[c] + block_offset,
878 s->dsp.clear_block(s->block);
879 if (decode_block(s, s->block, i,
880 s->dc_index[i], s->ac_index[i],
881 s->quant_matrixes[s->quant_index[c]]) < 0) {
882 av_log(s->avctx, AV_LOG_ERROR,
883 "error y=%d x=%d\n", mb_y, mb_x);
884 return AVERROR_INVALIDDATA;
886 s->dsp.idct_put(ptr, linesize[c], s->block);
889 int block_idx = s->block_stride[c] * (v * mb_y + y) +
891 int16_t *block = s->blocks[c][block_idx];
893 block[0] += get_bits1(&s->gb) *
894 s->quant_matrixes[s->quant_index[c]][0] << Al;
895 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
896 s->quant_matrixes[s->quant_index[c]],
898 av_log(s->avctx, AV_LOG_ERROR,
899 "error y=%d x=%d\n", mb_y, mb_x);
900 return AVERROR_INVALIDDATA;
903 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
904 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
905 mb_x, mb_y, x, y, c, s->bottom_field,
906 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
914 if (s->restart_interval) {
916 i = 8 + ((-get_bits_count(&s->gb)) & 7);
918 if (show_bits(&s->gb, i) == (1 << i) - 1) {
919 int pos = get_bits_count(&s->gb);
920 align_get_bits(&s->gb);
921 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
922 skip_bits(&s->gb, 8);
923 if ((get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
924 for (i = 0; i < nb_components; i++) /* reset dc */
925 s->last_dc[i] = 1024;
927 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
935 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
936 int se, int Ah, int Al,
937 const uint8_t *mb_bitmask,
938 const AVFrame *reference)
942 int c = s->comp_index[0];
943 uint8_t *data = s->picture_ptr->data[c];
944 const uint8_t *reference_data = reference ? reference->data[c] : NULL;
945 int linesize = s->linesize[c];
947 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
948 GetBitContext mb_bitmask_gb;
950 if (ss < 0 || ss >= 64 ||
951 se < ss || se >= 64 ||
953 return AVERROR_INVALIDDATA;
956 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
959 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
960 last_scan = !~s->coefs_finished[c];
963 if (s->interlaced && s->bottom_field) {
964 int offset = linesize >> 1;
966 reference_data += offset;
969 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
970 int block_offset = mb_y * linesize * 8;
971 uint8_t *ptr = data + block_offset;
972 int block_idx = mb_y * s->block_stride[c];
973 int16_t (*block)[64] = &s->blocks[c][block_idx];
974 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
975 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
976 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
981 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
982 quant_matrix, ss, se, Al, &EOBRUN);
984 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
985 quant_matrix, ss, se, Al, &EOBRUN);
987 av_log(s->avctx, AV_LOG_ERROR,
988 "error y=%d x=%d\n", mb_y, mb_x);
989 return AVERROR_INVALIDDATA;
995 s->hdsp.put_pixels_tab[1][0](ptr,
996 reference_data + block_offset,
999 s->dsp.idct_put(ptr, linesize, *block);
1008 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1009 const AVFrame *reference)
1011 int len, nb_components, i, h, v, predictor, point_transform;
1013 const int block_size = s->lossless ? 1 : 8;
1014 int ilv, prev_shift;
1016 /* XXX: verify len field validity */
1017 len = get_bits(&s->gb, 16);
1018 nb_components = get_bits(&s->gb, 8);
1019 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1020 av_log(s->avctx, AV_LOG_ERROR,
1021 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1022 return AVERROR_PATCHWELCOME;
1024 if (len != 6 + 2 * nb_components) {
1025 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1026 return AVERROR_INVALIDDATA;
1028 for (i = 0; i < nb_components; i++) {
1029 id = get_bits(&s->gb, 8) - 1;
1030 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1031 /* find component index */
1032 for (index = 0; index < s->nb_components; index++)
1033 if (id == s->component_id[index])
1035 if (index == s->nb_components) {
1036 av_log(s->avctx, AV_LOG_ERROR,
1037 "decode_sos: index(%d) out of components\n", index);
1038 return AVERROR_INVALIDDATA;
1040 /* Metasoft MJPEG codec has Cb and Cr swapped */
1041 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1042 && nb_components == 3 && s->nb_components == 3 && i)
1045 s->comp_index[i] = index;
1047 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1048 s->h_scount[i] = s->h_count[index];
1049 s->v_scount[i] = s->v_count[index];
1051 s->dc_index[i] = get_bits(&s->gb, 4);
1052 s->ac_index[i] = get_bits(&s->gb, 4);
1054 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1055 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1057 if (!s->vlcs[0][s->dc_index[i]].table ||
1058 !s->vlcs[1][s->ac_index[i]].table)
1062 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1063 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1064 prev_shift = get_bits(&s->gb, 4); /* Ah */
1065 point_transform = get_bits(&s->gb, 4); /* Al */
1067 if (nb_components > 1) {
1068 /* interleaved stream */
1069 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1070 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1071 } else if (!s->ls) { /* skip this for JPEG-LS */
1072 h = s->h_max / s->h_scount[0];
1073 v = s->v_max / s->v_scount[0];
1074 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1075 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1076 s->nb_blocks[0] = 1;
1081 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1082 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n",
1083 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1084 predictor, point_transform, ilv, s->bits,
1085 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
1088 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1089 for (i = s->mjpb_skiptosod; i > 0; i--)
1090 skip_bits(&s->gb, 8);
1093 for (i = 0; i < nb_components; i++)
1094 s->last_dc[i] = 1024;
1097 if (CONFIG_JPEGLS_DECODER && s->ls) {
1099 // reset_ls_coding_parameters(s, 0);
1101 if ((ret = ff_jpegls_decode_picture(s, predictor,
1102 point_transform, ilv)) < 0)
1106 if ((ret = ljpeg_decode_rgb_scan(s, predictor,
1107 point_transform)) < 0)
1110 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1112 nb_components)) < 0)
1117 if (s->progressive && predictor) {
1118 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1125 if ((ret = mjpeg_decode_scan(s, nb_components,
1126 prev_shift, point_transform,
1127 mb_bitmask, reference)) < 0)
1132 if (s->interlaced &&
1133 get_bits_left(&s->gb) > 32 &&
1134 show_bits(&s->gb, 8) == 0xFF) {
1135 GetBitContext bak = s->gb;
1136 align_get_bits(&bak);
1137 if (show_bits(&bak, 16) == 0xFFD1) {
1138 av_dlog(s->avctx, "AVRn interlaced picture marker found\n");
1140 skip_bits(&s->gb, 16);
1141 s->bottom_field ^= 1;
1150 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1151 return AVERROR_INVALIDDATA;
1154 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1156 if (get_bits(&s->gb, 16) != 4)
1157 return AVERROR_INVALIDDATA;
1158 s->restart_interval = get_bits(&s->gb, 16);
1159 s->restart_count = 0;
1160 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1161 s->restart_interval);
1166 static int mjpeg_decode_app(MJpegDecodeContext *s)
1170 len = get_bits(&s->gb, 16);
1172 return AVERROR_INVALIDDATA;
1173 if (8 * len > get_bits_left(&s->gb))
1174 return AVERROR_INVALIDDATA;
1176 id = get_bits_long(&s->gb, 32);
1177 id = av_be2ne32(id);
1180 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1181 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1183 /* Buggy AVID, it puts EOI only at every 10th frame. */
1184 /* Also, this fourcc is used by non-avid files too, it holds some
1185 information, but it's always present in AVID-created files. */
1186 if (id == AV_RL32("AVI1")) {
1192 4bytes field_size_less_padding
1195 i = get_bits(&s->gb, 8);
1197 s->bottom_field = 1;
1199 s->bottom_field = 0;
1201 skip_bits(&s->gb, 8);
1202 skip_bits(&s->gb, 32);
1203 skip_bits(&s->gb, 32);
1211 if (id == AV_RL32("JFIF")) {
1212 int t_w, t_h, v1, v2;
1213 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1214 v1 = get_bits(&s->gb, 8);
1215 v2 = get_bits(&s->gb, 8);
1216 skip_bits(&s->gb, 8);
1218 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1219 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1221 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1222 av_log(s->avctx, AV_LOG_INFO,
1223 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1225 s->avctx->sample_aspect_ratio.num,
1226 s->avctx->sample_aspect_ratio.den);
1228 t_w = get_bits(&s->gb, 8);
1229 t_h = get_bits(&s->gb, 8);
1231 /* skip thumbnail */
1232 if (len -10 - (t_w * t_h * 3) > 0)
1233 len -= t_w * t_h * 3;
1239 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1240 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1241 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1242 skip_bits(&s->gb, 16); /* version */
1243 skip_bits(&s->gb, 16); /* flags0 */
1244 skip_bits(&s->gb, 16); /* flags1 */
1245 skip_bits(&s->gb, 8); /* transform */
1250 if (id == AV_RL32("LJIF")) {
1251 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1252 av_log(s->avctx, AV_LOG_INFO,
1253 "Pegasus lossless jpeg header found\n");
1254 skip_bits(&s->gb, 16); /* version ? */
1255 skip_bits(&s->gb, 16); /* unknwon always 0? */
1256 skip_bits(&s->gb, 16); /* unknwon always 0? */
1257 skip_bits(&s->gb, 16); /* unknwon always 0? */
1258 switch (get_bits(&s->gb, 8)) {
1268 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1275 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1276 id = get_bits_long(&s->gb, 32);
1277 id = av_be2ne32(id);
1280 if (id == AV_RL32("mjpg")) {
1282 skip_bits(&s->gb, 32); /* field size */
1283 skip_bits(&s->gb, 32); /* pad field size */
1284 skip_bits(&s->gb, 32); /* next off */
1285 skip_bits(&s->gb, 32); /* quant off */
1286 skip_bits(&s->gb, 32); /* huff off */
1287 skip_bits(&s->gb, 32); /* image off */
1288 skip_bits(&s->gb, 32); /* scan off */
1289 skip_bits(&s->gb, 32); /* data off */
1291 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1292 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1297 /* slow but needed for extreme adobe jpegs */
1299 av_log(s->avctx, AV_LOG_ERROR,
1300 "mjpeg: error, decode_app parser read over the end\n");
1302 skip_bits(&s->gb, 8);
1307 static int mjpeg_decode_com(MJpegDecodeContext *s)
1309 int len = get_bits(&s->gb, 16);
1310 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1311 char *cbuf = av_malloc(len - 1);
1314 for (i = 0; i < len - 2; i++)
1315 cbuf[i] = get_bits(&s->gb, 8);
1316 if (i > 0 && cbuf[i - 1] == '\n')
1321 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1322 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1324 /* buggy avid, it puts EOI only at every 10th frame */
1325 if (!strcmp(cbuf, "AVID")) {
1327 } else if (!strcmp(cbuf, "CS=ITU601"))
1329 else if ((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
1330 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1340 /* return the 8 bit start code value and update the search
1341 state. Return -1 if no start code found */
1342 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1344 const uint8_t *buf_ptr;
1351 buf_ptr = *pbuf_ptr;
1352 while (buf_ptr < buf_end) {
1355 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1365 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1366 *pbuf_ptr = buf_ptr;
1370 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1371 const uint8_t **buf_ptr, const uint8_t *buf_end,
1372 const uint8_t **unescaped_buf_ptr,
1373 int *unescaped_buf_size)
1376 start_code = find_marker(buf_ptr, buf_end);
1378 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1380 return AVERROR(ENOMEM);
1382 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1383 if (start_code == SOS && !s->ls) {
1384 const uint8_t *src = *buf_ptr;
1385 uint8_t *dst = s->buffer;
1387 while (src < buf_end) {
1388 uint8_t x = *(src++);
1391 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1393 while (src < buf_end && x == 0xff)
1396 if (x >= 0xd0 && x <= 0xd7)
1403 *unescaped_buf_ptr = s->buffer;
1404 *unescaped_buf_size = dst - s->buffer;
1405 memset(s->buffer + *unescaped_buf_size, 0,
1406 FF_INPUT_BUFFER_PADDING_SIZE);
1408 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1409 (buf_end - *buf_ptr) - (dst - s->buffer));
1410 } else if (start_code == SOS && s->ls) {
1411 const uint8_t *src = *buf_ptr;
1412 uint8_t *dst = s->buffer;
1420 while (src + t < buf_end) {
1421 uint8_t x = src[t++];
1423 while ((src + t < buf_end) && x == 0xff)
1432 init_put_bits(&pb, dst, t);
1434 /* unescape bitstream */
1436 uint8_t x = src[b++];
1437 put_bits(&pb, 8, x);
1440 put_bits(&pb, 7, x);
1444 flush_put_bits(&pb);
1446 *unescaped_buf_ptr = dst;
1447 *unescaped_buf_size = (bit_count + 7) >> 3;
1448 memset(s->buffer + *unescaped_buf_size, 0,
1449 FF_INPUT_BUFFER_PADDING_SIZE);
1451 *unescaped_buf_ptr = *buf_ptr;
1452 *unescaped_buf_size = buf_end - *buf_ptr;
1458 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1461 const uint8_t *buf = avpkt->data;
1462 int buf_size = avpkt->size;
1463 MJpegDecodeContext *s = avctx->priv_data;
1464 const uint8_t *buf_end, *buf_ptr;
1465 const uint8_t *unescaped_buf_ptr;
1466 int unescaped_buf_size;
1470 s->got_picture = 0; // picture from previous image can not be reused
1472 buf_end = buf + buf_size;
1473 while (buf_ptr < buf_end) {
1474 /* find start next marker */
1475 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1477 &unescaped_buf_size);
1479 if (start_code < 0) {
1481 } else if (unescaped_buf_size > INT_MAX / 8) {
1482 av_log(avctx, AV_LOG_ERROR,
1483 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1484 start_code, unescaped_buf_size, buf_size);
1485 return AVERROR_INVALIDDATA;
1488 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1489 start_code, buf_end - buf_ptr);
1491 ret = init_get_bits(&s->gb, unescaped_buf_ptr,
1492 unescaped_buf_size * 8);
1496 s->start_code = start_code;
1497 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1498 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1500 /* process markers */
1501 if (start_code >= 0xd0 && start_code <= 0xd7)
1502 av_log(avctx, AV_LOG_DEBUG,
1503 "restart marker: %d\n", start_code & 0x0f);
1505 else if (start_code >= APP0 && start_code <= APP15)
1506 mjpeg_decode_app(s);
1508 else if (start_code == COM)
1509 mjpeg_decode_com(s);
1511 if (!CONFIG_JPEGLS_DECODER &&
1512 (start_code == SOF48 || start_code == LSE)) {
1513 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
1514 return AVERROR(ENOSYS);
1517 switch (start_code) {
1519 s->restart_interval = 0;
1520 s->restart_count = 0;
1521 /* nothing to do on SOI */
1524 ff_mjpeg_decode_dqt(s);
1527 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1528 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1537 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1544 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1551 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1558 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1562 if (!CONFIG_JPEGLS_DECODER ||
1563 (ret = ff_jpegls_decode_lse(s)) < 0)
1568 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1571 if (!s->got_picture) {
1572 av_log(avctx, AV_LOG_WARNING,
1573 "Found EOI before any SOF, ignoring\n");
1576 if (s->interlaced) {
1577 s->bottom_field ^= 1;
1578 /* if not bottom field, do not output image yet */
1579 if (s->bottom_field == !s->interlace_polarity)
1582 if ((ret = av_frame_ref(data, s->picture_ptr)) < 0)
1587 avctx->debug & FF_DEBUG_QP) {
1588 av_log(avctx, AV_LOG_DEBUG,
1589 "QP: %d\n", FFMAX3(s->qscale[0],
1596 if (!s->got_picture) {
1597 av_log(avctx, AV_LOG_WARNING,
1598 "Can not process SOS before SOF, skipping\n");
1601 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1602 (avctx->err_recognition & AV_EF_EXPLODE))
1604 /* buggy avid puts EOI every 10-20th frame */
1605 /* if restart period is over process EOI */
1606 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1610 mjpeg_decode_dri(s);
1622 av_log(avctx, AV_LOG_ERROR,
1623 "mjpeg: unsupported coding type (%x)\n", start_code);
1628 /* eof process start code */
1629 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1630 av_log(avctx, AV_LOG_DEBUG,
1631 "marker parser used %d bytes (%d bits)\n",
1632 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1634 if (s->got_picture) {
1635 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1638 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1639 return AVERROR_INVALIDDATA;
1641 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n",
1643 // return buf_end - buf_ptr;
1644 return buf_ptr - buf;
1647 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1649 MJpegDecodeContext *s = avctx->priv_data;
1653 av_frame_unref(s->picture_ptr);
1656 av_freep(&s->ljpeg_buffer);
1657 s->ljpeg_buffer_size = 0;
1659 for (i = 0; i < 3; i++) {
1660 for (j = 0; j < 4; j++)
1661 ff_free_vlc(&s->vlcs[i][j]);
1663 for (i = 0; i < MAX_COMPONENTS; i++) {
1664 av_freep(&s->blocks[i]);
1665 av_freep(&s->last_nnz[i]);
1670 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1671 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1672 static const AVOption options[] = {
1673 { "extern_huff", "Use external huffman table.",
1674 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
1678 static const AVClass mjpegdec_class = {
1679 .class_name = "MJPEG decoder",
1680 .item_name = av_default_item_name,
1682 .version = LIBAVUTIL_VERSION_INT,
1685 AVCodec ff_mjpeg_decoder = {
1687 .type = AVMEDIA_TYPE_VIDEO,
1688 .id = AV_CODEC_ID_MJPEG,
1689 .priv_data_size = sizeof(MJpegDecodeContext),
1690 .init = ff_mjpeg_decode_init,
1691 .close = ff_mjpeg_decode_end,
1692 .decode = ff_mjpeg_decode_frame,
1693 .capabilities = CODEC_CAP_DR1,
1694 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1695 .priv_class = &mjpegdec_class,
1698 AVCodec ff_thp_decoder = {
1700 .type = AVMEDIA_TYPE_VIDEO,
1701 .id = AV_CODEC_ID_THP,
1702 .priv_data_size = sizeof(MJpegDecodeContext),
1703 .init = ff_mjpeg_decode_init,
1704 .close = ff_mjpeg_decode_end,
1705 .decode = ff_mjpeg_decode_frame,
1706 .capabilities = CODEC_CAP_DR1,
1707 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),