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 FFmpeg.
13 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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/avassert.h"
38 #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];
51 uint16_t huff_code[256];
52 uint16_t huff_sym[256];
55 assert(nb_codes <= 256);
57 memset(huff_size, 0, sizeof(huff_size));
58 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
60 for (i = 0; i < 256; i++)
61 huff_sym[i] = i + 16 * is_ac;
64 huff_sym[0] = 16 * 256;
66 return init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
67 huff_code, 2, 2, huff_sym, 2, 2, use_static);
70 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
72 build_vlc(&s->vlcs[0][0], ff_mjpeg_bits_dc_luminance,
73 ff_mjpeg_val_dc, 12, 0, 0);
74 build_vlc(&s->vlcs[0][1], ff_mjpeg_bits_dc_chrominance,
75 ff_mjpeg_val_dc, 12, 0, 0);
76 build_vlc(&s->vlcs[1][0], ff_mjpeg_bits_ac_luminance,
77 ff_mjpeg_val_ac_luminance, 251, 0, 1);
78 build_vlc(&s->vlcs[1][1], ff_mjpeg_bits_ac_chrominance,
79 ff_mjpeg_val_ac_chrominance, 251, 0, 1);
80 build_vlc(&s->vlcs[2][0], ff_mjpeg_bits_ac_luminance,
81 ff_mjpeg_val_ac_luminance, 251, 0, 0);
82 build_vlc(&s->vlcs[2][1], ff_mjpeg_bits_ac_chrominance,
83 ff_mjpeg_val_ac_chrominance, 251, 0, 0);
86 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
88 MJpegDecodeContext *s = avctx->priv_data;
91 s->picture_ptr = &s->picture;
92 avcodec_get_frame_defaults(&s->picture);
95 dsputil_init(&s->dsp, avctx);
96 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
100 s->first_picture = 1;
101 s->org_height = avctx->coded_height;
102 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
104 build_basic_mjpeg_vlc(s);
106 #if FF_API_MJPEG_GLOBAL_OPTS
107 if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
110 if (s->extern_huff) {
111 av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
112 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
113 if (ff_mjpeg_decode_dht(s)) {
114 av_log(avctx, AV_LOG_ERROR,
115 "mjpeg: error using external huffman table, switching back to internal\n");
116 build_basic_mjpeg_vlc(s);
119 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
120 s->interlace_polarity = 1; /* bottom field first */
121 av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
123 if (avctx->codec->id == CODEC_ID_AMV)
130 /* quantize tables */
131 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
133 int len, index, i, j;
135 len = get_bits(&s->gb, 16) - 2;
138 /* only 8 bit precision handled */
139 if (get_bits(&s->gb, 4) != 0) {
140 av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
143 index = get_bits(&s->gb, 4);
146 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
147 /* read quant table */
148 for (i = 0; i < 64; i++) {
149 j = s->scantable.permutated[i];
150 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
153 // XXX FIXME finetune, and perhaps add dc too
154 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
155 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
156 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
157 index, s->qscale[index]);
163 /* decode huffman tables and build VLC decoders */
164 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
166 int len, index, i, class, n, v, code_max;
167 uint8_t bits_table[17];
168 uint8_t val_table[256];
170 len = get_bits(&s->gb, 16) - 2;
175 class = get_bits(&s->gb, 4);
178 index = get_bits(&s->gb, 4);
182 for (i = 1; i <= 16; i++) {
183 bits_table[i] = get_bits(&s->gb, 8);
187 if (len < n || n > 256)
191 for (i = 0; i < n; i++) {
192 v = get_bits(&s->gb, 8);
199 /* build VLC and flush previous vlc if present */
200 free_vlc(&s->vlcs[class][index]);
201 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
202 class, index, code_max + 1);
203 if (build_vlc(&s->vlcs[class][index], bits_table, val_table,
204 code_max + 1, 0, class > 0) < 0)
208 free_vlc(&s->vlcs[2][index]);
209 if (build_vlc(&s->vlcs[2][index], bits_table, val_table,
210 code_max + 1, 0, 0) < 0)
217 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
219 int len, nb_components, i, width, height, pix_fmt_id;
222 s->upscale_h = s->upscale_v = 0;
224 /* XXX: verify len field validity */
225 len = get_bits(&s->gb, 16);
226 s->bits = get_bits(&s->gb, 8);
230 if (s->bits == 9 && !s->pegasus_rct)
231 s->rct = 1; // FIXME ugly
233 if (s->bits != 8 && !s->lossless) {
234 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
238 if(s->lossless && s->avctx->lowres){
239 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
243 height = get_bits(&s->gb, 16);
244 width = get_bits(&s->gb, 16);
246 // HACK for odd_height.mov
247 if (s->interlaced && s->width == width && s->height == height + 1)
250 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
251 if (av_image_check_size(width, height, 0, s->avctx))
254 nb_components = get_bits(&s->gb, 8);
255 if (nb_components <= 0 ||
256 nb_components > MAX_COMPONENTS)
258 if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
259 av_log(s->avctx, AV_LOG_ERROR,
260 "only <= 8 bits/component or 16-bit gray accepted for JPEG-LS\n");
263 s->nb_components = nb_components;
266 for (i = 0; i < nb_components; i++) {
268 s->component_id[i] = get_bits(&s->gb, 8) - 1;
269 s->h_count[i] = get_bits(&s->gb, 4);
270 s->v_count[i] = get_bits(&s->gb, 4);
271 /* compute hmax and vmax (only used in interleaved case) */
272 if (s->h_count[i] > s->h_max)
273 s->h_max = s->h_count[i];
274 if (s->v_count[i] > s->v_max)
275 s->v_max = s->v_count[i];
276 s->quant_index[i] = get_bits(&s->gb, 8);
277 if (s->quant_index[i] >= 4)
279 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
280 i, s->h_count[i], s->v_count[i],
281 s->component_id[i], s->quant_index[i]);
284 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
285 av_log(s->avctx, AV_LOG_ERROR,
286 "Subsampling in JPEG-LS is not supported.\n");
290 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && nb_components==3)
293 /* if different size, realloc/alloc picture */
294 /* XXX: also check h_count and v_count */
295 if (width != s->width || height != s->height) {
296 av_freep(&s->qscale_table);
302 /* test interlaced mode */
303 if (s->first_picture &&
304 s->org_height != 0 &&
305 s->height < ((s->org_height * 3) / 4)) {
307 s->bottom_field = s->interlace_polarity;
308 s->picture_ptr->interlaced_frame = 1;
309 s->picture_ptr->top_field_first = !s->interlace_polarity;
313 avcodec_set_dimensions(s->avctx, width, height);
315 s->qscale_table = av_mallocz((s->width + 15) / 16);
316 s->first_picture = 0;
319 if (s->interlaced && (s->bottom_field == !s->interlace_polarity))
322 /* XXX: not complete test ! */
323 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
324 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
325 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
326 (s->h_count[3] << 4) | s->v_count[3];
327 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
328 /* NOTE we do not allocate pictures large enough for the possible
329 * padding of h/v_count being 4 */
330 if (!(pix_fmt_id & 0xD0D0D0D0))
331 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
332 if (!(pix_fmt_id & 0x0D0D0D0D))
333 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
335 switch (pix_fmt_id) {
338 s->avctx->pix_fmt = PIX_FMT_BGR24;
340 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
341 s->avctx->pix_fmt = PIX_FMT_GBR24P;
343 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
344 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
347 assert(s->nb_components == 3);
351 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
352 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
354 s->upscale_h = (pix_fmt_id == 0x22122100);
355 s->chroma_height = s->height;
359 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
360 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
361 s->upscale_v = (pix_fmt_id == 0x22211200);
363 s->chroma_height = s->height;
366 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
367 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
370 s->chroma_height = s->height / 2;
374 s->avctx->pix_fmt = PIX_FMT_GRAY8;
376 s->avctx->pix_fmt = PIX_FMT_GRAY16;
381 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV440P : PIX_FMT_YUVJ440P;
382 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
383 s->upscale_h = (pix_fmt_id == 0x22211100) * 2 + (pix_fmt_id == 0x22112100);
384 s->chroma_height = s->height / 2;
387 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
388 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
392 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
393 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
394 s->upscale_v = (pix_fmt_id == 0x22121100) + 1;
397 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P;
398 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
401 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
405 s->upscale_h = s->upscale_v = 0;
406 if (s->nb_components > 1)
407 s->avctx->pix_fmt = PIX_FMT_RGB24;
408 else if (s->bits <= 8)
409 s->avctx->pix_fmt = PIX_FMT_GRAY8;
411 s->avctx->pix_fmt = PIX_FMT_GRAY16;
414 if (s->picture_ptr->data[0])
415 s->avctx->release_buffer(s->avctx, s->picture_ptr);
417 if (s->avctx->get_buffer(s->avctx, s->picture_ptr) < 0) {
418 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
421 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
422 s->picture_ptr->key_frame = 1;
425 for (i = 0; i < 3; i++)
426 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
428 // printf("%d %d %d %d %d %d\n",
429 // s->width, s->height, s->linesize[0], s->linesize[1],
430 // s->interlaced, s->avctx->height);
432 if (len != (8 + (3 * nb_components)))
433 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
435 /* totally blank picture as progressive JPEG will only add details to it */
436 if (s->progressive) {
437 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
438 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
439 for (i = 0; i < s->nb_components; i++) {
440 int size = bw * bh * s->h_count[i] * s->v_count[i];
441 av_freep(&s->blocks[i]);
442 av_freep(&s->last_nnz[i]);
443 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
444 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
445 s->block_stride[i] = bw * s->h_count[i];
447 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
452 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
455 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
457 av_log(s->avctx, AV_LOG_WARNING,
458 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
459 0, dc_index, &s->vlcs[0][dc_index]);
464 return get_xbits(&s->gb, code);
469 /* decode block and dequantize */
470 static int decode_block(MJpegDecodeContext *s, DCTELEM *block, int component,
471 int dc_index, int ac_index, int16_t *quant_matrix)
473 int code, i, j, level, val;
476 val = mjpeg_decode_dc(s, dc_index);
478 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
481 val = val * quant_matrix[0] + s->last_dc[component];
482 s->last_dc[component] = val;
486 {OPEN_READER(re, &s->gb);
488 UPDATE_CACHE(re, &s->gb);
489 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
491 i += ((unsigned)code) >> 4;
494 if (code > MIN_CACHE_BITS - 16)
495 UPDATE_CACHE(re, &s->gb);
498 int cache = GET_CACHE(re, &s->gb);
499 int sign = (~cache) >> 31;
500 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
503 LAST_SKIP_BITS(re, &s->gb, code);
506 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
509 j = s->scantable.permutated[i];
510 block[j] = level * quant_matrix[j];
513 CLOSE_READER(re, &s->gb);}
518 static int decode_dc_progressive(MJpegDecodeContext *s, DCTELEM *block,
519 int component, int dc_index,
520 int16_t *quant_matrix, int Al)
523 s->dsp.clear_block(block);
524 val = mjpeg_decode_dc(s, dc_index);
526 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
529 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
530 s->last_dc[component] = val;
535 /* decode block and dequantize - progressive JPEG version */
536 static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block,
537 uint8_t *last_nnz, int ac_index,
538 int16_t *quant_matrix,
539 int ss, int se, int Al, int *EOBRUN)
541 int code, i, j, level, val, run;
549 OPEN_READER(re, &s->gb);
550 for (i = ss; ; i++) {
551 UPDATE_CACHE(re, &s->gb);
552 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
554 run = ((unsigned) code) >> 4;
558 if (code > MIN_CACHE_BITS - 16)
559 UPDATE_CACHE(re, &s->gb);
562 int cache = GET_CACHE(re, &s->gb);
563 int sign = (~cache) >> 31;
564 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
567 LAST_SKIP_BITS(re, &s->gb, code);
571 j = s->scantable.permutated[se];
572 block[j] = level * quant_matrix[j] << Al;
575 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
578 j = s->scantable.permutated[i];
579 block[j] = level * quant_matrix[j] << Al;
581 if (run == 0xF) {// ZRL - skip 15 coefficients
584 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
590 UPDATE_CACHE(re, &s->gb);
591 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
592 LAST_SKIP_BITS(re, &s->gb, run);
599 CLOSE_READER(re, &s->gb);
608 #define REFINE_BIT(j) { \
609 UPDATE_CACHE(re, &s->gb); \
610 sign = block[j] >> 15; \
611 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
612 ((quant_matrix[j] ^ sign) - sign) << Al; \
613 LAST_SKIP_BITS(re, &s->gb, 1); \
621 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
626 j = s->scantable.permutated[i]; \
629 else if (run-- == 0) \
633 /* decode block and dequantize - progressive JPEG refinement pass */
634 static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block,
636 int ac_index, int16_t *quant_matrix,
637 int ss, int se, int Al, int *EOBRUN)
639 int code, i = ss, j, sign, val, run;
640 int last = FFMIN(se, *last_nnz);
642 OPEN_READER(re, &s->gb);
647 UPDATE_CACHE(re, &s->gb);
648 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
651 run = ((unsigned) code) >> 4;
652 UPDATE_CACHE(re, &s->gb);
653 val = SHOW_UBITS(re, &s->gb, 1);
654 LAST_SKIP_BITS(re, &s->gb, 1);
656 j = s->scantable.permutated[i];
658 block[j] = ((quant_matrix[j]^val) - val) << Al;
662 CLOSE_READER(re, &s->gb);
666 run = ((unsigned) code) >> 4;
673 UPDATE_CACHE(re, &s->gb);
674 run += SHOW_UBITS(re, &s->gb, val);
675 LAST_SKIP_BITS(re, &s->gb, val);
687 for (; i <= last; i++) {
688 j = s->scantable.permutated[i];
692 CLOSE_READER(re, &s->gb);
699 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
702 uint16_t (*buffer)[4];
703 int left[3], top[3], topleft[3];
704 const int linesize = s->linesize[0];
705 const int mask = (1 << s->bits) - 1;
709 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
710 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
711 buffer = s->ljpeg_buffer;
713 for (i = 0; i < 3; i++)
714 buffer[0][i] = 1 << (s->bits - 1);
716 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
717 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
719 if (s->interlaced && s->bottom_field)
720 ptr += linesize >> 1;
722 for (i = 0; i < 3; i++)
723 top[i] = left[i] = topleft[i] = buffer[0][i];
725 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
726 int modified_predictor = predictor;
728 if (s->restart_interval && !s->restart_count){
729 s->restart_count = s->restart_interval;
733 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
735 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
736 modified_predictor = 1;
738 for (i=0;i<nb_components;i++) {
742 top[i] = buffer[mb_x][i];
744 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
746 dc = mjpeg_decode_dc(s, s->dc_index[i]);
750 left[i] = buffer[mb_x][i] =
751 mask & (pred + (dc << point_transform));
754 if (s->restart_interval && !--s->restart_count) {
755 align_get_bits(&s->gb);
756 skip_bits(&s->gb, 16); /* skip RSTn */
761 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
762 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
763 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
764 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
766 } else if (s->pegasus_rct) {
767 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
768 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
769 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
770 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
773 for(i=0; i<nb_components; i++) {
774 int c= s->comp_index[i];
775 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
776 ptr[3*mb_x+2-c] = buffer[mb_x][i];
784 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
788 const int nb_components=s->nb_components;
789 int bits= (s->bits+7)&~7;
793 point_transform += bits - s->bits;
795 av_assert0(nb_components==1 || nb_components==3);
797 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
798 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
799 if (s->restart_interval && !s->restart_count){
800 s->restart_count = s->restart_interval;
805 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
806 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
807 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
808 for (i = 0; i < nb_components; i++) {
811 int n, h, v, x, y, c, j, linesize;
813 c = s->comp_index[i];
818 linesize= s->linesize[c];
820 if(bits>8) linesize /= 2;
825 dc = mjpeg_decode_dc(s, s->dc_index[i]);
829 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
832 pred= 1 << (bits - 1);
838 pred= ptr[-linesize];
840 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
844 if (s->interlaced && s->bottom_field)
845 ptr += linesize >> 1;
846 pred &= (-1)<<(8-s->bits);
847 *ptr= pred + (dc << point_transform);
849 ptr16 = s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x); //FIXME optimize this crap
852 pred= 1 << (bits - 1);
858 pred= ptr16[-linesize];
860 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
864 if (s->interlaced && s->bottom_field)
865 ptr16 += linesize >> 1;
866 pred &= (-1)<<(16-s->bits);
867 *ptr16= pred + (dc << point_transform);
876 for (i = 0; i < nb_components; i++) {
879 int n, h, v, x, y, c, j, linesize, dc;
881 c = s->comp_index[i];
886 linesize = s->linesize[c];
888 if(bits>8) linesize /= 2;
890 for (j = 0; j < n; j++) {
893 dc = mjpeg_decode_dc(s, s->dc_index[i]);
897 ptr = s->picture.data[c] +
898 (linesize * (v * mb_y + y)) +
899 (h * mb_x + x); //FIXME optimize this crap
900 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
902 pred &= (-1)<<(8-s->bits);
903 *ptr = pred + (dc << point_transform);
905 ptr16 = s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x); //FIXME optimize this crap
906 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
908 pred &= (-1)<<(16-s->bits);
909 *ptr16= pred + (dc << point_transform);
919 if (s->restart_interval && !--s->restart_count) {
920 align_get_bits(&s->gb);
921 skip_bits(&s->gb, 16); /* skip RSTn */
928 static av_always_inline void mjpeg_copy_block(uint8_t *dst, const uint8_t *src,
929 int linesize, int lowres)
932 case 0: copy_block8(dst, src, linesize, linesize, 8);
934 case 1: copy_block4(dst, src, linesize, linesize, 4);
936 case 2: copy_block2(dst, src, linesize, linesize, 2);
943 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
944 int Al, const uint8_t *mb_bitmask,
945 const AVFrame *reference)
948 uint8_t *data[MAX_COMPONENTS];
949 const uint8_t *reference_data[MAX_COMPONENTS];
950 int linesize[MAX_COMPONENTS];
951 GetBitContext mb_bitmask_gb;
954 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
956 if (s->flipped && s->avctx->flags & CODEC_FLAG_EMU_EDGE) {
957 av_log(s->avctx, AV_LOG_ERROR,
958 "Can not flip image with CODEC_FLAG_EMU_EDGE set!\n");
962 for (i = 0; i < nb_components; i++) {
963 int c = s->comp_index[i];
964 data[c] = s->picture_ptr->data[c];
965 reference_data[c] = reference ? reference->data[c] : NULL;
966 linesize[c] = s->linesize[c];
967 s->coefs_finished[c] |= 1;
969 // picture should be flipped upside-down for this codec
970 int offset = (linesize[c] * (s->v_scount[i] *
971 (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
973 reference_data[c] += offset;
978 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
979 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
980 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
982 if (s->restart_interval && !s->restart_count)
983 s->restart_count = s->restart_interval;
985 if (get_bits_count(&s->gb)>s->gb.size_in_bits) {
986 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
987 get_bits_count(&s->gb) - s->gb.size_in_bits);
990 for (i = 0; i < nb_components; i++) {
992 int n, h, v, x, y, c, j;
995 c = s->comp_index[i];
1000 for (j = 0; j < n; j++) {
1001 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1002 (h * mb_x + x) * 8) >> s->avctx->lowres);
1004 if (s->interlaced && s->bottom_field)
1005 block_offset += linesize[c] >> 1;
1006 ptr = data[c] + block_offset;
1007 if (!s->progressive) {
1009 mjpeg_copy_block(ptr, reference_data[c] + block_offset,
1010 linesize[c], s->avctx->lowres);
1012 s->dsp.clear_block(s->block);
1013 if (decode_block(s, s->block, i,
1014 s->dc_index[i], s->ac_index[i],
1015 s->quant_matrixes[s->quant_index[c]]) < 0) {
1016 av_log(s->avctx, AV_LOG_ERROR,
1017 "error y=%d x=%d\n", mb_y, mb_x);
1020 s->dsp.idct_put(ptr, linesize[c], s->block);
1023 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1025 DCTELEM *block = s->blocks[c][block_idx];
1027 block[0] += get_bits1(&s->gb) *
1028 s->quant_matrixes[s->quant_index[c]][0] << Al;
1029 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1030 s->quant_matrixes[s->quant_index[c]],
1032 av_log(s->avctx, AV_LOG_ERROR,
1033 "error y=%d x=%d\n", mb_y, mb_x);
1037 // av_log(s->avctx, AV_LOG_DEBUG, "mb: %d %d processed\n",
1039 // av_log(NULL, AV_LOG_DEBUG, "%d %d %d %d %d %d %d %d \n",
1040 // mb_x, mb_y, x, y, c, s->bottom_field,
1041 // (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1049 if (s->restart_interval) {
1051 i = 8 + ((-get_bits_count(&s->gb)) & 7);
1053 if (show_bits(&s->gb, i) == (1 << i) - 1) {
1054 int pos = get_bits_count(&s->gb);
1055 align_get_bits(&s->gb);
1056 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
1057 skip_bits(&s->gb, 8);
1058 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
1059 for (i = 0; i < nb_components; i++) /* reset dc */
1060 s->last_dc[i] = 1024;
1062 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
1070 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1071 int se, int Ah, int Al)
1075 int c = s->comp_index[0];
1076 uint8_t *data = s->picture.data[c];
1077 int linesize = s->linesize[c];
1079 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
1082 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
1083 last_scan = !~s->coefs_finished[c];
1086 if (s->interlaced && s->bottom_field)
1087 data += linesize >> 1;
1089 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1090 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1091 int block_idx = mb_y * s->block_stride[c];
1092 DCTELEM (*block)[64] = &s->blocks[c][block_idx];
1093 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1094 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1097 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1098 quant_matrix, ss, se, Al, &EOBRUN);
1100 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1101 quant_matrix, ss, se, Al, &EOBRUN);
1103 av_log(s->avctx, AV_LOG_ERROR,
1104 "error y=%d x=%d\n", mb_y, mb_x);
1109 s->dsp.idct_put(ptr, linesize, *block);
1110 ptr += 8 >> s->avctx->lowres;
1117 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1118 const AVFrame *reference)
1120 int len, nb_components, i, h, v, predictor, point_transform;
1122 const int block_size = s->lossless ? 1 : 8;
1123 int ilv, prev_shift;
1125 /* XXX: verify len field validity */
1126 len = get_bits(&s->gb, 16);
1127 nb_components = get_bits(&s->gb, 8);
1128 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1129 av_log(s->avctx, AV_LOG_ERROR,
1130 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1133 if (len != 6 + 2 * nb_components) {
1134 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1137 for (i = 0; i < nb_components; i++) {
1138 id = get_bits(&s->gb, 8) - 1;
1139 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1140 /* find component index */
1141 for (index = 0; index < s->nb_components; index++)
1142 if (id == s->component_id[index])
1144 if (index == s->nb_components) {
1145 av_log(s->avctx, AV_LOG_ERROR,
1146 "decode_sos: index(%d) out of components\n", index);
1149 /* Metasoft MJPEG codec has Cb and Cr swapped */
1150 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1151 && nb_components == 3 && s->nb_components == 3 && i)
1154 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == PIX_FMT_GBR24P)
1157 s->comp_index[i] = index;
1159 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1160 s->h_scount[i] = s->h_count[index];
1161 s->v_scount[i] = s->v_count[index];
1163 s->dc_index[i] = get_bits(&s->gb, 4);
1164 s->ac_index[i] = get_bits(&s->gb, 4);
1166 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1167 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1169 if (!s->vlcs[0][s->dc_index[i]].table || !(s->progressive ? s->vlcs[2][s->ac_index[0]].table : s->vlcs[1][s->ac_index[i]].table))
1173 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1174 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1175 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1176 prev_shift = get_bits(&s->gb, 4); /* Ah */
1177 point_transform = get_bits(&s->gb, 4); /* Al */
1179 prev_shift = point_transform = 0;
1181 for (i = 0; i < nb_components; i++)
1182 s->last_dc[i] = 1024;
1184 if (nb_components > 1) {
1185 /* interleaved stream */
1186 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1187 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1188 } else if (!s->ls) { /* skip this for JPEG-LS */
1189 h = s->h_max / s->h_scount[0];
1190 v = s->v_max / s->v_scount[0];
1191 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1192 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1193 s->nb_blocks[0] = 1;
1198 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1199 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1200 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1201 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1202 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1205 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1206 for (i = s->mjpb_skiptosod; i > 0; i--)
1207 skip_bits(&s->gb, 8);
1210 av_assert0(s->picture_ptr == &s->picture);
1211 if (CONFIG_JPEGLS_DECODER && s->ls) {
1213 // reset_ls_coding_parameters(s, 0);
1215 if (ff_jpegls_decode_picture(s, predictor, point_transform, ilv) < 0)
1219 if (ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform) < 0)
1222 if (ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0)
1227 if (s->progressive && predictor) {
1228 av_assert0(s->picture_ptr == &s->picture);
1229 if (mjpeg_decode_scan_progressive_ac(s, predictor, ilv, prev_shift,
1230 point_transform) < 0)
1233 if (mjpeg_decode_scan(s, nb_components, prev_shift, point_transform,
1234 mb_bitmask, reference) < 0)
1241 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1245 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1247 if (get_bits(&s->gb, 16) != 4)
1249 s->restart_interval = get_bits(&s->gb, 16);
1250 s->restart_count = 0;
1251 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1252 s->restart_interval);
1257 static int mjpeg_decode_app(MJpegDecodeContext *s)
1261 len = get_bits(&s->gb, 16);
1264 if (8 * len + get_bits_count(&s->gb) > s->gb.size_in_bits)
1267 id = get_bits_long(&s->gb, 32);
1268 id = av_be2ne32(id);
1271 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1272 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1274 /* Buggy AVID, it puts EOI only at every 10th frame. */
1275 /* Also, this fourcc is used by non-avid files too, it holds some
1276 information, but it's always present in AVID-created files. */
1277 if (id == AV_RL32("AVI1")) {
1283 4bytes field_size_less_padding
1286 // if (s->first_picture)
1287 // printf("mjpeg: workarounding buggy AVID\n");
1288 i = get_bits(&s->gb, 8); len--;
1289 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1291 skip_bits(&s->gb, 8);
1292 skip_bits(&s->gb, 32);
1293 skip_bits(&s->gb, 32);
1296 // if (s->interlace_polarity)
1297 // printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
1303 if (id == AV_RL32("JFIF")) {
1304 int t_w, t_h, v1, v2;
1305 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1306 v1 = get_bits(&s->gb, 8);
1307 v2 = get_bits(&s->gb, 8);
1308 skip_bits(&s->gb, 8);
1310 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1311 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1313 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1314 av_log(s->avctx, AV_LOG_INFO,
1315 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1317 s->avctx->sample_aspect_ratio.num,
1318 s->avctx->sample_aspect_ratio.den);
1320 t_w = get_bits(&s->gb, 8);
1321 t_h = get_bits(&s->gb, 8);
1323 /* skip thumbnail */
1324 if (len -10 - (t_w * t_h * 3) > 0)
1325 len -= t_w * t_h * 3;
1331 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1332 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1333 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1334 skip_bits(&s->gb, 16); /* version */
1335 skip_bits(&s->gb, 16); /* flags0 */
1336 skip_bits(&s->gb, 16); /* flags1 */
1337 skip_bits(&s->gb, 8); /* transform */
1342 if (id == AV_RL32("LJIF")) {
1343 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1344 av_log(s->avctx, AV_LOG_INFO,
1345 "Pegasus lossless jpeg header found\n");
1346 skip_bits(&s->gb, 16); /* version ? */
1347 skip_bits(&s->gb, 16); /* unknwon always 0? */
1348 skip_bits(&s->gb, 16); /* unknwon always 0? */
1349 skip_bits(&s->gb, 16); /* unknwon always 0? */
1350 switch (get_bits(&s->gb, 8)) {
1360 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1367 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1368 id = get_bits_long(&s->gb, 32);
1369 id = av_be2ne32(id);
1372 if (id == AV_RL32("mjpg")) {
1374 skip_bits(&s->gb, 32); /* field size */
1375 skip_bits(&s->gb, 32); /* pad field size */
1376 skip_bits(&s->gb, 32); /* next off */
1377 skip_bits(&s->gb, 32); /* quant off */
1378 skip_bits(&s->gb, 32); /* huff off */
1379 skip_bits(&s->gb, 32); /* image off */
1380 skip_bits(&s->gb, 32); /* scan off */
1381 skip_bits(&s->gb, 32); /* data off */
1383 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1384 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1389 /* slow but needed for extreme adobe jpegs */
1391 av_log(s->avctx, AV_LOG_ERROR,
1392 "mjpeg: error, decode_app parser read over the end\n");
1394 skip_bits(&s->gb, 8);
1399 static int mjpeg_decode_com(MJpegDecodeContext *s)
1401 int len = get_bits(&s->gb, 16);
1403 8 * len - 16 + get_bits_count(&s->gb) <= s->gb.size_in_bits) {
1404 char *cbuf = av_malloc(len - 1);
1407 for (i = 0; i < len - 2; i++)
1408 cbuf[i] = get_bits(&s->gb, 8);
1409 if (i > 0 && cbuf[i - 1] == '\n')
1414 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1415 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1417 /* buggy avid, it puts EOI only at every 10th frame */
1418 if (!strcmp(cbuf, "AVID")) {
1420 // if (s->first_picture)
1421 // printf("mjpeg: workarounding buggy AVID\n");
1422 } else if (!strcmp(cbuf, "CS=ITU601"))
1424 else if ((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
1425 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1435 /* return the 8 bit start code value and update the search
1436 state. Return -1 if no start code found */
1437 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1439 const uint8_t *buf_ptr;
1444 buf_ptr = *pbuf_ptr;
1445 while (buf_ptr < buf_end) {
1448 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1456 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1457 *pbuf_ptr = buf_ptr;
1461 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1462 const uint8_t **buf_ptr, const uint8_t *buf_end,
1463 const uint8_t **unescaped_buf_ptr,
1464 int *unescaped_buf_size)
1467 start_code = find_marker(buf_ptr, buf_end);
1469 if ((buf_end - *buf_ptr) > s->buffer_size) {
1471 s->buffer_size = buf_end - *buf_ptr;
1472 s->buffer = av_malloc(s->buffer_size + FF_INPUT_BUFFER_PADDING_SIZE);
1473 av_log(s->avctx, AV_LOG_DEBUG,
1474 "buffer too small, expanding to %d bytes\n", s->buffer_size);
1477 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1478 if (start_code == SOS && !s->ls) {
1479 const uint8_t *src = *buf_ptr;
1480 uint8_t *dst = s->buffer;
1482 while (src < buf_end) {
1483 uint8_t x = *(src++);
1486 if (s->avctx->codec_id != CODEC_ID_THP) {
1488 while (src < buf_end && x == 0xff)
1491 if (x >= 0xd0 && x <= 0xd7)
1498 *unescaped_buf_ptr = s->buffer;
1499 *unescaped_buf_size = dst - s->buffer;
1501 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1502 (buf_end - *buf_ptr) - (dst - s->buffer));
1503 } else if (start_code == SOS && s->ls) {
1504 const uint8_t *src = *buf_ptr;
1505 uint8_t *dst = s->buffer;
1513 while (src + t < buf_end) {
1514 uint8_t x = src[t++];
1516 while ((src + t < buf_end) && x == 0xff)
1525 init_put_bits(&pb, dst, t);
1527 /* unescape bitstream */
1529 uint8_t x = src[b++];
1530 put_bits(&pb, 8, x);
1533 put_bits(&pb, 7, x);
1537 flush_put_bits(&pb);
1539 *unescaped_buf_ptr = dst;
1540 *unescaped_buf_size = (bit_count + 7) >> 3;
1542 *unescaped_buf_ptr = *buf_ptr;
1543 *unescaped_buf_size = buf_end - *buf_ptr;
1549 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
1552 const uint8_t *buf = avpkt->data;
1553 int buf_size = avpkt->size;
1554 MJpegDecodeContext *s = avctx->priv_data;
1555 const uint8_t *buf_end, *buf_ptr;
1556 const uint8_t *unescaped_buf_ptr;
1557 int unescaped_buf_size;
1560 AVFrame *picture = data;
1562 s->got_picture = 0; // picture from previous image can not be reused
1564 buf_end = buf + buf_size;
1565 while (buf_ptr < buf_end) {
1566 /* find start next marker */
1567 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1569 &unescaped_buf_size);
1571 if (start_code < 0) {
1574 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1575 start_code, buf_end - buf_ptr);
1577 init_get_bits(&s->gb, unescaped_buf_ptr, unescaped_buf_size * 8);
1579 s->start_code = start_code;
1580 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1581 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1583 /* process markers */
1584 if (start_code >= 0xd0 && start_code <= 0xd7)
1585 av_log(avctx, AV_LOG_DEBUG,
1586 "restart marker: %d\n", start_code & 0x0f);
1588 else if (start_code >= APP0 && start_code <= APP15)
1589 mjpeg_decode_app(s);
1591 else if (start_code == COM)
1592 mjpeg_decode_com(s);
1594 switch (start_code) {
1596 s->restart_interval = 0;
1597 s->restart_count = 0;
1598 /* nothing to do on SOI */
1601 ff_mjpeg_decode_dqt(s);
1604 if (ff_mjpeg_decode_dht(s) < 0) {
1605 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1614 if (ff_mjpeg_decode_sof(s) < 0)
1621 if (ff_mjpeg_decode_sof(s) < 0)
1628 if (ff_mjpeg_decode_sof(s) < 0)
1635 if (ff_mjpeg_decode_sof(s) < 0)
1639 if (!CONFIG_JPEGLS_DECODER || ff_jpegls_decode_lse(s) < 0)
1645 if (!s->got_picture) {
1646 av_log(avctx, AV_LOG_WARNING,
1647 "Found EOI before any SOF, ignoring\n");
1650 if (s->interlaced) {
1651 s->bottom_field ^= 1;
1652 /* if not bottom field, do not output image yet */
1653 if (s->bottom_field == !s->interlace_polarity)
1656 *picture = *s->picture_ptr;
1657 *data_size = sizeof(AVFrame);
1660 picture->quality = FFMAX3(s->qscale[0],
1663 picture->qstride = 0;
1664 picture->qscale_table = s->qscale_table;
1665 memset(picture->qscale_table, picture->quality,
1666 (s->width + 15) / 16);
1667 if (avctx->debug & FF_DEBUG_QP)
1668 av_log(avctx, AV_LOG_DEBUG,
1669 "QP: %d\n", picture->quality);
1670 picture->quality *= FF_QP2LAMBDA;
1675 if (!s->got_picture) {
1676 av_log(avctx, AV_LOG_WARNING,
1677 "Can not process SOS before SOF, skipping\n");
1680 if (ff_mjpeg_decode_sos(s, NULL, NULL) < 0 &&
1681 (avctx->err_recognition & AV_EF_EXPLODE))
1682 return AVERROR_INVALIDDATA;
1685 mjpeg_decode_dri(s);
1697 av_log(avctx, AV_LOG_ERROR,
1698 "mjpeg: unsupported coding type (%x)\n", start_code);
1701 // printf("mjpeg: unsupported marker (%x)\n", start_code);
1705 /* eof process start code */
1706 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1707 av_log(avctx, AV_LOG_DEBUG,
1708 "marker parser used %d bytes (%d bits)\n",
1709 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1712 if (s->got_picture) {
1713 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1716 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1720 uint8_t *line = s->picture_ptr->data[s->upscale_h];
1721 av_assert0(avctx->pix_fmt == PIX_FMT_YUVJ444P ||
1722 avctx->pix_fmt == PIX_FMT_YUV444P ||
1723 avctx->pix_fmt == PIX_FMT_YUVJ440P ||
1724 avctx->pix_fmt == PIX_FMT_YUV440P);
1725 for (i = 0; i < s->chroma_height; i++) {
1726 for (index = s->width - 1; index; index--)
1727 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
1728 line += s->linesize[s->upscale_h];
1732 uint8_t *dst = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(s->height - 1) * s->linesize[s->upscale_v]];
1733 av_assert0(avctx->pix_fmt == PIX_FMT_YUVJ444P ||
1734 avctx->pix_fmt == PIX_FMT_YUV444P ||
1735 avctx->pix_fmt == PIX_FMT_YUVJ422P ||
1736 avctx->pix_fmt == PIX_FMT_YUV422P);
1737 for (i = s->height - 1; i; i--) {
1738 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[i / 2 * s->linesize[s->upscale_v]];
1739 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(i + 1) / 2 * s->linesize[s->upscale_v]];
1741 memcpy(dst, src1, s->width);
1743 for (index = 0; index < s->width; index++)
1744 dst[index] = (src1[index] + src2[index]) >> 1;
1746 dst -= s->linesize[s->upscale_v];
1749 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n",
1751 // return buf_end - buf_ptr;
1752 return buf_ptr - buf;
1755 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1757 MJpegDecodeContext *s = avctx->priv_data;
1760 if (s->picture_ptr && s->picture_ptr->data[0])
1761 avctx->release_buffer(avctx, s->picture_ptr);
1764 av_free(s->qscale_table);
1765 av_freep(&s->ljpeg_buffer);
1766 s->ljpeg_buffer_size = 0;
1768 for (i = 0; i < 3; i++) {
1769 for (j = 0; j < 4; j++)
1770 free_vlc(&s->vlcs[i][j]);
1772 for (i = 0; i < MAX_COMPONENTS; i++) {
1773 av_freep(&s->blocks[i]);
1774 av_freep(&s->last_nnz[i]);
1779 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1780 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1781 static const AVOption options[] = {
1782 { "extern_huff", "Use external huffman table.",
1783 OFFSET(extern_huff), AV_OPT_TYPE_INT, { 0 }, 0, 1, VD },
1787 static const AVClass mjpegdec_class = {
1788 .class_name = "MJPEG decoder",
1789 .item_name = av_default_item_name,
1791 .version = LIBAVUTIL_VERSION_INT,
1794 AVCodec ff_mjpeg_decoder = {
1796 .type = AVMEDIA_TYPE_VIDEO,
1797 .id = CODEC_ID_MJPEG,
1798 .priv_data_size = sizeof(MJpegDecodeContext),
1799 .init = ff_mjpeg_decode_init,
1800 .close = ff_mjpeg_decode_end,
1801 .decode = ff_mjpeg_decode_frame,
1802 .capabilities = CODEC_CAP_DR1,
1804 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1805 .priv_class = &mjpegdec_class,
1808 AVCodec ff_thp_decoder = {
1810 .type = AVMEDIA_TYPE_VIDEO,
1812 .priv_data_size = sizeof(MJpegDecodeContext),
1813 .init = ff_mjpeg_decode_init,
1814 .close = ff_mjpeg_decode_end,
1815 .decode = ff_mjpeg_decode_frame,
1816 .capabilities = CODEC_CAP_DR1,
1818 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),