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
33 #include "libavutil/imgutils.h"
34 #include "libavutil/avassert.h"
35 #include "libavutil/opt.h"
37 #include "copy_block.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 av_assert0(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;
89 avcodec_get_frame_defaults(&s->picture);
92 ff_hpeldsp_init(&s->hdsp, avctx->flags);
93 ff_dsputil_init(&s->dsp, avctx);
94 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
100 s->org_height = avctx->coded_height;
101 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
103 build_basic_mjpeg_vlc(s);
105 if (s->extern_huff) {
106 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
107 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
108 if (ff_mjpeg_decode_dht(s)) {
109 av_log(avctx, AV_LOG_ERROR,
110 "error using external huffman table, switching back to internal\n");
111 build_basic_mjpeg_vlc(s);
114 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
115 s->interlace_polarity = 1; /* bottom field first */
116 av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
118 if (avctx->codec->id == AV_CODEC_ID_AMV)
125 /* quantize tables */
126 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
128 int len, index, i, j;
130 len = get_bits(&s->gb, 16) - 2;
133 int pr = get_bits(&s->gb, 4);
135 av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
136 return AVERROR_INVALIDDATA;
138 index = get_bits(&s->gb, 4);
141 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
142 /* read quant table */
143 for (i = 0; i < 64; i++) {
144 j = s->scantable.permutated[i];
145 s->quant_matrixes[index][j] = get_bits(&s->gb, pr ? 16 : 8);
148 // XXX FIXME finetune, and perhaps add dc too
149 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
150 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
151 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
152 index, s->qscale[index]);
158 /* decode huffman tables and build VLC decoders */
159 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
161 int len, index, i, class, n, v, code_max;
162 uint8_t bits_table[17];
163 uint8_t val_table[256];
166 len = get_bits(&s->gb, 16) - 2;
170 return AVERROR_INVALIDDATA;
171 class = get_bits(&s->gb, 4);
173 return AVERROR_INVALIDDATA;
174 index = get_bits(&s->gb, 4);
176 return AVERROR_INVALIDDATA;
178 for (i = 1; i <= 16; i++) {
179 bits_table[i] = get_bits(&s->gb, 8);
183 if (len < n || n > 256)
184 return AVERROR_INVALIDDATA;
187 for (i = 0; i < n; i++) {
188 v = get_bits(&s->gb, 8);
195 /* build VLC and flush previous vlc if present */
196 ff_free_vlc(&s->vlcs[class][index]);
197 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
198 class, index, code_max + 1);
199 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
200 code_max + 1, 0, class > 0)) < 0)
204 ff_free_vlc(&s->vlcs[2][index]);
205 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
206 code_max + 1, 0, 0)) < 0)
213 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
215 int len, nb_components, i, width, height, pix_fmt_id;
216 int h_count[MAX_COMPONENTS];
217 int v_count[MAX_COMPONENTS];
220 s->upscale_h = s->upscale_v = 0;
222 /* XXX: verify len field validity */
223 len = get_bits(&s->gb, 16);
224 s->bits = get_bits(&s->gb, 8);
228 if (s->bits == 9 && !s->pegasus_rct)
229 s->rct = 1; // FIXME ugly
231 if (s->bits != 8 && !s->lossless) {
232 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
236 if(s->lossless && s->avctx->lowres){
237 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
241 height = get_bits(&s->gb, 16);
242 width = get_bits(&s->gb, 16);
244 // HACK for odd_height.mov
245 if (s->interlaced && s->width == width && s->height == height + 1)
248 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
249 if (av_image_check_size(width, height, 0, s->avctx))
250 return AVERROR_INVALIDDATA;
252 nb_components = get_bits(&s->gb, 8);
253 if (nb_components <= 0 ||
254 nb_components > MAX_COMPONENTS)
256 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
257 if (nb_components != s->nb_components) {
258 av_log(s->avctx, AV_LOG_ERROR, "nb_components changing in interlaced picture\n");
259 return AVERROR_INVALIDDATA;
262 if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
263 avpriv_report_missing_feature(s->avctx,
264 "JPEG-LS that is not <= 8 "
265 "bits/component or 16-bit gray");
266 return AVERROR_PATCHWELCOME;
268 s->nb_components = nb_components;
271 memset(h_count, 0, sizeof(h_count));
272 memset(v_count, 0, sizeof(v_count));
273 for (i = 0; i < nb_components; i++) {
275 s->component_id[i] = get_bits(&s->gb, 8) - 1;
276 h_count[i] = get_bits(&s->gb, 4);
277 v_count[i] = get_bits(&s->gb, 4);
278 /* compute hmax and vmax (only used in interleaved case) */
279 if (h_count[i] > s->h_max)
280 s->h_max = h_count[i];
281 if (v_count[i] > s->v_max)
282 s->v_max = v_count[i];
283 s->quant_index[i] = get_bits(&s->gb, 8);
284 if (s->quant_index[i] >= 4) {
285 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
286 return AVERROR_INVALIDDATA;
288 if (!h_count[i] || !v_count[i]) {
289 av_log(s->avctx, AV_LOG_ERROR,
290 "Invalid sampling factor in component %d %d:%d\n",
291 i, h_count[i], v_count[i]);
292 return AVERROR_INVALIDDATA;
295 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
296 i, h_count[i], v_count[i],
297 s->component_id[i], s->quant_index[i]);
300 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
301 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
302 return AVERROR_PATCHWELCOME;
306 /* if different size, realloc/alloc picture */
307 if ( width != s->width || height != s->height
308 || memcmp(s->h_count, h_count, sizeof(h_count))
309 || memcmp(s->v_count, v_count, sizeof(v_count))) {
313 memcpy(s->h_count, h_count, sizeof(h_count));
314 memcpy(s->v_count, v_count, sizeof(v_count));
318 /* test interlaced mode */
319 if (s->first_picture &&
320 s->org_height != 0 &&
321 s->height < ((s->org_height * 3) / 4)) {
323 s->bottom_field = s->interlace_polarity;
324 s->picture_ptr->interlaced_frame = 1;
325 s->picture_ptr->top_field_first = !s->interlace_polarity;
329 avcodec_set_dimensions(s->avctx, width, height);
331 s->first_picture = 0;
334 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
335 if (s->progressive) {
336 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
337 return AVERROR_INVALIDDATA;
340 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && nb_components==3)
342 else if (!s->lossless)
344 /* XXX: not complete test ! */
345 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
346 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
347 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
348 (s->h_count[3] << 4) | s->v_count[3];
349 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
350 /* NOTE we do not allocate pictures large enough for the possible
351 * padding of h/v_count being 4 */
352 if (!(pix_fmt_id & 0xD0D0D0D0))
353 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
354 if (!(pix_fmt_id & 0x0D0D0D0D))
355 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
357 switch (pix_fmt_id) {
360 s->avctx->pix_fmt = AV_PIX_FMT_BGR24;
362 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
363 s->avctx->pix_fmt = AV_PIX_FMT_GBR24P;
365 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
366 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
369 av_assert0(s->nb_components == 3);
373 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
374 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
376 s->upscale_h = (pix_fmt_id == 0x22122100);
377 s->chroma_height = s->height;
381 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
382 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
383 s->upscale_v = (pix_fmt_id == 0x22211200);
385 s->chroma_height = s->height;
388 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
389 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
392 s->chroma_height = s->height / 2;
404 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
406 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
411 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
412 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
413 s->upscale_h = (pix_fmt_id == 0x22211100) * 2 + (pix_fmt_id == 0x22112100);
414 s->chroma_height = s->height / 2;
417 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
418 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
422 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
423 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
424 s->upscale_v = (pix_fmt_id == 0x22121100) + 1;
427 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
428 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
431 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
432 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
435 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
436 return AVERROR_PATCHWELCOME;
438 if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
439 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
440 return AVERROR_PATCHWELCOME;
443 s->upscale_h = s->upscale_v = 0;
444 if (s->nb_components > 1)
445 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
446 else if (s->bits <= 8)
447 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
449 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
452 av_frame_unref(s->picture_ptr);
453 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
455 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
456 s->picture_ptr->key_frame = 1;
459 for (i = 0; i < 3; i++)
460 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
462 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
463 s->width, s->height, s->linesize[0], s->linesize[1],
464 s->interlaced, s->avctx->height);
466 if (len != (8 + (3 * nb_components)))
467 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
470 if (s->rgb && !s->lossless && !s->ls) {
471 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
472 return AVERROR_PATCHWELCOME;
475 /* totally blank picture as progressive JPEG will only add details to it */
476 if (s->progressive) {
477 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
478 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
479 for (i = 0; i < s->nb_components; i++) {
480 int size = bw * bh * s->h_count[i] * s->v_count[i];
481 av_freep(&s->blocks[i]);
482 av_freep(&s->last_nnz[i]);
483 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
484 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
485 s->block_stride[i] = bw * s->h_count[i];
487 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
492 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
495 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
497 av_log(s->avctx, AV_LOG_WARNING,
498 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
499 0, dc_index, &s->vlcs[0][dc_index]);
504 return get_xbits(&s->gb, code);
509 /* decode block and dequantize */
510 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
511 int dc_index, int ac_index, int16_t *quant_matrix)
513 int code, i, j, level, val;
516 val = mjpeg_decode_dc(s, dc_index);
518 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
519 return AVERROR_INVALIDDATA;
521 val = val * quant_matrix[0] + s->last_dc[component];
522 s->last_dc[component] = val;
526 {OPEN_READER(re, &s->gb);
528 UPDATE_CACHE(re, &s->gb);
529 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
531 i += ((unsigned)code) >> 4;
534 if (code > MIN_CACHE_BITS - 16)
535 UPDATE_CACHE(re, &s->gb);
538 int cache = GET_CACHE(re, &s->gb);
539 int sign = (~cache) >> 31;
540 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
543 LAST_SKIP_BITS(re, &s->gb, code);
546 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
547 return AVERROR_INVALIDDATA;
549 j = s->scantable.permutated[i];
550 block[j] = level * quant_matrix[j];
553 CLOSE_READER(re, &s->gb);}
558 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
559 int component, int dc_index,
560 int16_t *quant_matrix, int Al)
563 s->dsp.clear_block(block);
564 val = mjpeg_decode_dc(s, dc_index);
566 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
567 return AVERROR_INVALIDDATA;
569 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
570 s->last_dc[component] = val;
575 /* decode block and dequantize - progressive JPEG version */
576 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
577 uint8_t *last_nnz, int ac_index,
578 int16_t *quant_matrix,
579 int ss, int se, int Al, int *EOBRUN)
581 int code, i, j, level, val, run;
589 OPEN_READER(re, &s->gb);
590 for (i = ss; ; i++) {
591 UPDATE_CACHE(re, &s->gb);
592 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
594 run = ((unsigned) code) >> 4;
598 if (code > MIN_CACHE_BITS - 16)
599 UPDATE_CACHE(re, &s->gb);
602 int cache = GET_CACHE(re, &s->gb);
603 int sign = (~cache) >> 31;
604 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
607 LAST_SKIP_BITS(re, &s->gb, code);
611 j = s->scantable.permutated[se];
612 block[j] = level * quant_matrix[j] << Al;
615 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
616 return AVERROR_INVALIDDATA;
618 j = s->scantable.permutated[i];
619 block[j] = level * quant_matrix[j] << Al;
621 if (run == 0xF) {// ZRL - skip 15 coefficients
624 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
625 return AVERROR_INVALIDDATA;
630 UPDATE_CACHE(re, &s->gb);
631 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
632 LAST_SKIP_BITS(re, &s->gb, run);
639 CLOSE_READER(re, &s->gb);
648 #define REFINE_BIT(j) { \
649 UPDATE_CACHE(re, &s->gb); \
650 sign = block[j] >> 15; \
651 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
652 ((quant_matrix[j] ^ sign) - sign) << Al; \
653 LAST_SKIP_BITS(re, &s->gb, 1); \
661 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
666 j = s->scantable.permutated[i]; \
669 else if (run-- == 0) \
673 /* decode block and dequantize - progressive JPEG refinement pass */
674 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
676 int ac_index, int16_t *quant_matrix,
677 int ss, int se, int Al, int *EOBRUN)
679 int code, i = ss, j, sign, val, run;
680 int last = FFMIN(se, *last_nnz);
682 OPEN_READER(re, &s->gb);
687 UPDATE_CACHE(re, &s->gb);
688 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
691 run = ((unsigned) code) >> 4;
692 UPDATE_CACHE(re, &s->gb);
693 val = SHOW_UBITS(re, &s->gb, 1);
694 LAST_SKIP_BITS(re, &s->gb, 1);
696 j = s->scantable.permutated[i];
698 block[j] = ((quant_matrix[j]^val) - val) << Al;
702 CLOSE_READER(re, &s->gb);
706 run = ((unsigned) code) >> 4;
713 UPDATE_CACHE(re, &s->gb);
714 run += SHOW_UBITS(re, &s->gb, val);
715 LAST_SKIP_BITS(re, &s->gb, val);
727 for (; i <= last; i++) {
728 j = s->scantable.permutated[i];
732 CLOSE_READER(re, &s->gb);
739 static void handle_rstn(MJpegDecodeContext *s, int nb_components)
742 if (s->restart_interval) {
744 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
745 align_get_bits(&s->gb);
746 for (i = 0; i < nb_components; i++) /* reset dc */
747 s->last_dc[i] = 1024;
750 i = 8 + ((-get_bits_count(&s->gb)) & 7);
752 if (s->restart_count == 0) {
753 if( show_bits(&s->gb, i) == (1 << i) - 1
754 || show_bits(&s->gb, i) == 0xFF) {
755 int pos = get_bits_count(&s->gb);
756 align_get_bits(&s->gb);
757 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
758 skip_bits(&s->gb, 8);
759 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
760 for (i = 0; i < nb_components; i++) /* reset dc */
761 s->last_dc[i] = 1024;
763 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
769 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
772 uint16_t (*buffer)[4];
773 int left[3], top[3], topleft[3];
774 const int linesize = s->linesize[0];
775 const int mask = (1 << s->bits) - 1;
779 s->restart_count = s->restart_interval;
781 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
782 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
783 buffer = s->ljpeg_buffer;
785 for (i = 0; i < 3; i++)
786 buffer[0][i] = 1 << (s->bits - 1);
788 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
789 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
791 if (s->interlaced && s->bottom_field)
792 ptr += linesize >> 1;
794 for (i = 0; i < 3; i++)
795 top[i] = left[i] = topleft[i] = buffer[0][i];
797 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
798 int modified_predictor = predictor;
800 if (s->restart_interval && !s->restart_count){
801 s->restart_count = s->restart_interval;
805 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
807 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
808 modified_predictor = 1;
810 for (i=0;i<nb_components;i++) {
814 top[i] = buffer[mb_x][i];
816 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
818 dc = mjpeg_decode_dc(s, s->dc_index[i]);
822 left[i] = buffer[mb_x][i] =
823 mask & (pred + (dc << point_transform));
826 if (s->restart_interval && !--s->restart_count) {
827 align_get_bits(&s->gb);
828 skip_bits(&s->gb, 16); /* skip RSTn */
833 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
834 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
835 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
836 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
838 } else if (s->pegasus_rct) {
839 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
840 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
841 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
842 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
845 for(i=0; i<nb_components; i++) {
846 int c= s->comp_index[i];
847 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
848 ptr[3*mb_x+2-c] = buffer[mb_x][i];
856 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
857 int point_transform, int nb_components)
860 int bits= (s->bits+7)&~7;
864 point_transform += bits - s->bits;
866 av_assert0(nb_components>=1 && nb_components<=3);
868 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
869 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
870 if (s->restart_interval && !s->restart_count){
871 s->restart_count = s->restart_interval;
876 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
877 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
878 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
879 for (i = 0; i < nb_components; i++) {
882 int n, h, v, x, y, c, j, linesize;
884 c = s->comp_index[i];
889 linesize= s->linesize[c];
891 if(bits>8) linesize /= 2;
896 dc = mjpeg_decode_dc(s, s->dc_index[i]);
900 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
903 pred= 1 << (bits - 1);
909 pred= ptr[-linesize];
911 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
915 if (s->interlaced && s->bottom_field)
916 ptr += linesize >> 1;
917 pred &= (-1)<<(8-s->bits);
918 *ptr= pred + (dc << point_transform);
920 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
923 pred= 1 << (bits - 1);
929 pred= ptr16[-linesize];
931 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
935 if (s->interlaced && s->bottom_field)
936 ptr16 += linesize >> 1;
937 pred &= (-1)<<(16-s->bits);
938 *ptr16= pred + (dc << point_transform);
947 for (i = 0; i < nb_components; i++) {
950 int n, h, v, x, y, c, j, linesize, dc;
952 c = s->comp_index[i];
957 linesize = s->linesize[c];
959 if(bits>8) linesize /= 2;
961 for (j = 0; j < n; j++) {
964 dc = mjpeg_decode_dc(s, s->dc_index[i]);
968 ptr = s->picture.data[c] +
969 (linesize * (v * mb_y + y)) +
970 (h * mb_x + x); //FIXME optimize this crap
971 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
973 pred &= (-1)<<(8-s->bits);
974 *ptr = pred + (dc << point_transform);
976 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
977 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
979 pred &= (-1)<<(16-s->bits);
980 *ptr16= pred + (dc << point_transform);
990 if (s->restart_interval && !--s->restart_count) {
991 align_get_bits(&s->gb);
992 skip_bits(&s->gb, 16); /* skip RSTn */
999 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1000 uint8_t *dst, const uint8_t *src,
1001 int linesize, int lowres)
1004 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1006 case 1: copy_block4(dst, src, linesize, linesize, 4);
1008 case 2: copy_block2(dst, src, linesize, linesize, 2);
1010 case 3: *dst = *src;
1015 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1016 int Al, const uint8_t *mb_bitmask,
1017 const AVFrame *reference)
1020 uint8_t *data[MAX_COMPONENTS];
1021 const uint8_t *reference_data[MAX_COMPONENTS];
1022 int linesize[MAX_COMPONENTS];
1023 GetBitContext mb_bitmask_gb;
1026 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1028 if (s->flipped && s->avctx->lowres) {
1029 av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with lowres\n");
1033 for (i = 0; i < nb_components; i++) {
1034 int c = s->comp_index[i];
1035 data[c] = s->picture_ptr->data[c];
1036 reference_data[c] = reference ? reference->data[c] : NULL;
1037 linesize[c] = s->linesize[c];
1038 s->coefs_finished[c] |= 1;
1039 if (s->flipped && !(s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
1040 // picture should be flipped upside-down for this codec
1041 int offset = (linesize[c] * (s->v_scount[i] *
1042 (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
1044 reference_data[c] += offset;
1049 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1050 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1051 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1053 if (s->restart_interval && !s->restart_count)
1054 s->restart_count = s->restart_interval;
1056 if (get_bits_left(&s->gb) < 0) {
1057 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1058 -get_bits_left(&s->gb));
1059 return AVERROR_INVALIDDATA;
1061 for (i = 0; i < nb_components; i++) {
1063 int n, h, v, x, y, c, j;
1065 n = s->nb_blocks[i];
1066 c = s->comp_index[i];
1071 for (j = 0; j < n; j++) {
1072 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1073 (h * mb_x + x) * 8) >> s->avctx->lowres);
1075 if (s->interlaced && s->bottom_field)
1076 block_offset += linesize[c] >> 1;
1077 ptr = data[c] + block_offset;
1078 if (!s->progressive) {
1080 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1081 linesize[c], s->avctx->lowres);
1084 s->dsp.clear_block(s->block);
1085 if (decode_block(s, s->block, i,
1086 s->dc_index[i], s->ac_index[i],
1087 s->quant_matrixes[s->quant_index[c]]) < 0) {
1088 av_log(s->avctx, AV_LOG_ERROR,
1089 "error y=%d x=%d\n", mb_y, mb_x);
1090 return AVERROR_INVALIDDATA;
1092 s->dsp.idct_put(ptr, linesize[c], s->block);
1095 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1097 int16_t *block = s->blocks[c][block_idx];
1099 block[0] += get_bits1(&s->gb) *
1100 s->quant_matrixes[s->quant_index[c]][0] << Al;
1101 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1102 s->quant_matrixes[s->quant_index[c]],
1104 av_log(s->avctx, AV_LOG_ERROR,
1105 "error y=%d x=%d\n", mb_y, mb_x);
1106 return AVERROR_INVALIDDATA;
1109 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1110 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1111 mb_x, mb_y, x, y, c, s->bottom_field,
1112 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1120 handle_rstn(s, nb_components);
1126 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1127 int se, int Ah, int Al)
1131 int c = s->comp_index[0];
1132 uint8_t *data = s->picture.data[c];
1133 int linesize = s->linesize[c];
1135 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
1137 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1138 if (se < ss || se > 63) {
1139 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1140 return AVERROR_INVALIDDATA;
1144 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
1145 last_scan = !~s->coefs_finished[c];
1148 if (s->interlaced && s->bottom_field)
1149 data += linesize >> 1;
1151 s->restart_count = 0;
1153 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1154 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1155 int block_idx = mb_y * s->block_stride[c];
1156 int16_t (*block)[64] = &s->blocks[c][block_idx];
1157 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1158 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1160 if (s->restart_interval && !s->restart_count)
1161 s->restart_count = s->restart_interval;
1164 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1165 quant_matrix, ss, se, Al, &EOBRUN);
1167 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1168 quant_matrix, ss, se, Al, &EOBRUN);
1170 av_log(s->avctx, AV_LOG_ERROR,
1171 "error y=%d x=%d\n", mb_y, mb_x);
1172 return AVERROR_INVALIDDATA;
1176 s->dsp.idct_put(ptr, linesize, *block);
1177 ptr += 8 >> s->avctx->lowres;
1185 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1186 const AVFrame *reference)
1188 int len, nb_components, i, h, v, predictor, point_transform;
1190 const int block_size = s->lossless ? 1 : 8;
1191 int ilv, prev_shift;
1193 if (!s->got_picture) {
1194 av_log(s->avctx, AV_LOG_WARNING,
1195 "Can not process SOS before SOF, skipping\n");
1199 av_assert0(s->picture_ptr->data[0]);
1200 /* XXX: verify len field validity */
1201 len = get_bits(&s->gb, 16);
1202 nb_components = get_bits(&s->gb, 8);
1203 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1204 av_log(s->avctx, AV_LOG_ERROR,
1205 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1206 return AVERROR_PATCHWELCOME;
1208 if (len != 6 + 2 * nb_components) {
1209 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1210 return AVERROR_INVALIDDATA;
1212 for (i = 0; i < nb_components; i++) {
1213 id = get_bits(&s->gb, 8) - 1;
1214 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1215 /* find component index */
1216 for (index = 0; index < s->nb_components; index++)
1217 if (id == s->component_id[index])
1219 if (index == s->nb_components) {
1220 av_log(s->avctx, AV_LOG_ERROR,
1221 "decode_sos: index(%d) out of components\n", index);
1222 return AVERROR_INVALIDDATA;
1224 /* Metasoft MJPEG codec has Cb and Cr swapped */
1225 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1226 && nb_components == 3 && s->nb_components == 3 && i)
1229 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1231 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1232 index = (index+2)%3;
1234 s->comp_index[i] = index;
1236 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1237 s->h_scount[i] = s->h_count[index];
1238 s->v_scount[i] = s->v_count[index];
1240 s->dc_index[i] = get_bits(&s->gb, 4);
1241 s->ac_index[i] = get_bits(&s->gb, 4);
1243 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1244 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1246 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))
1250 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1251 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1252 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1253 prev_shift = get_bits(&s->gb, 4); /* Ah */
1254 point_transform = get_bits(&s->gb, 4); /* Al */
1256 prev_shift = point_transform = 0;
1258 if (nb_components > 1) {
1259 /* interleaved stream */
1260 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1261 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1262 } else if (!s->ls) { /* skip this for JPEG-LS */
1263 h = s->h_max / s->h_scount[0];
1264 v = s->v_max / s->v_scount[0];
1265 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1266 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1267 s->nb_blocks[0] = 1;
1272 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1273 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1274 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1275 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1276 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1279 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1280 for (i = s->mjpb_skiptosod; i > 0; i--)
1281 skip_bits(&s->gb, 8);
1284 for (i = 0; i < nb_components; i++)
1285 s->last_dc[i] = 1024;
1288 av_assert0(s->picture_ptr == &s->picture);
1289 if (CONFIG_JPEGLS_DECODER && s->ls) {
1291 // reset_ls_coding_parameters(s, 0);
1293 if ((ret = ff_jpegls_decode_picture(s, predictor,
1294 point_transform, ilv)) < 0)
1298 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1301 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1303 nb_components)) < 0)
1308 if (s->progressive && predictor) {
1309 av_assert0(s->picture_ptr == &s->picture);
1310 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1312 point_transform)) < 0)
1315 if ((ret = mjpeg_decode_scan(s, nb_components,
1316 prev_shift, point_transform,
1317 mb_bitmask, reference)) < 0)
1322 if (s->interlaced &&
1323 get_bits_left(&s->gb) > 32 &&
1324 show_bits(&s->gb, 8) == 0xFF) {
1325 GetBitContext bak = s->gb;
1326 align_get_bits(&bak);
1327 if (show_bits(&bak, 16) == 0xFFD1) {
1328 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1330 skip_bits(&s->gb, 16);
1331 s->bottom_field ^= 1;
1340 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1341 return AVERROR_INVALIDDATA;
1344 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1346 if (get_bits(&s->gb, 16) != 4)
1347 return AVERROR_INVALIDDATA;
1348 s->restart_interval = get_bits(&s->gb, 16);
1349 s->restart_count = 0;
1350 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1351 s->restart_interval);
1356 static int mjpeg_decode_app(MJpegDecodeContext *s)
1360 len = get_bits(&s->gb, 16);
1362 return AVERROR_INVALIDDATA;
1363 if (8 * len > get_bits_left(&s->gb))
1364 return AVERROR_INVALIDDATA;
1366 id = get_bits_long(&s->gb, 32);
1369 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1370 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1372 /* Buggy AVID, it puts EOI only at every 10th frame. */
1373 /* Also, this fourcc is used by non-avid files too, it holds some
1374 information, but it's always present in AVID-created files. */
1375 if (id == AV_RB32("AVI1")) {
1381 4bytes field_size_less_padding
1384 i = get_bits(&s->gb, 8); len--;
1385 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1387 skip_bits(&s->gb, 8);
1388 skip_bits(&s->gb, 32);
1389 skip_bits(&s->gb, 32);
1397 if (id == AV_RB32("JFIF")) {
1398 int t_w, t_h, v1, v2;
1399 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1400 v1 = get_bits(&s->gb, 8);
1401 v2 = get_bits(&s->gb, 8);
1402 skip_bits(&s->gb, 8);
1404 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1405 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1407 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1408 av_log(s->avctx, AV_LOG_INFO,
1409 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1411 s->avctx->sample_aspect_ratio.num,
1412 s->avctx->sample_aspect_ratio.den);
1414 t_w = get_bits(&s->gb, 8);
1415 t_h = get_bits(&s->gb, 8);
1417 /* skip thumbnail */
1418 if (len -10 - (t_w * t_h * 3) > 0)
1419 len -= t_w * t_h * 3;
1425 if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1426 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1427 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1428 skip_bits(&s->gb, 16); /* version */
1429 skip_bits(&s->gb, 16); /* flags0 */
1430 skip_bits(&s->gb, 16); /* flags1 */
1431 skip_bits(&s->gb, 8); /* transform */
1436 if (id == AV_RB32("LJIF")) {
1437 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1438 av_log(s->avctx, AV_LOG_INFO,
1439 "Pegasus lossless jpeg header found\n");
1440 skip_bits(&s->gb, 16); /* version ? */
1441 skip_bits(&s->gb, 16); /* unknown always 0? */
1442 skip_bits(&s->gb, 16); /* unknown always 0? */
1443 skip_bits(&s->gb, 16); /* unknown always 0? */
1444 switch (get_bits(&s->gb, 8)) {
1454 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1461 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1462 id = get_bits_long(&s->gb, 32);
1465 if (id == AV_RB32("mjpg")) {
1467 skip_bits(&s->gb, 32); /* field size */
1468 skip_bits(&s->gb, 32); /* pad field size */
1469 skip_bits(&s->gb, 32); /* next off */
1470 skip_bits(&s->gb, 32); /* quant off */
1471 skip_bits(&s->gb, 32); /* huff off */
1472 skip_bits(&s->gb, 32); /* image off */
1473 skip_bits(&s->gb, 32); /* scan off */
1474 skip_bits(&s->gb, 32); /* data off */
1476 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1477 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1482 /* slow but needed for extreme adobe jpegs */
1484 av_log(s->avctx, AV_LOG_ERROR,
1485 "mjpeg: error, decode_app parser read over the end\n");
1487 skip_bits(&s->gb, 8);
1492 static int mjpeg_decode_com(MJpegDecodeContext *s)
1494 int len = get_bits(&s->gb, 16);
1495 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1496 char *cbuf = av_malloc(len - 1);
1499 for (i = 0; i < len - 2; i++)
1500 cbuf[i] = get_bits(&s->gb, 8);
1501 if (i > 0 && cbuf[i - 1] == '\n')
1506 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1507 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1509 /* buggy avid, it puts EOI only at every 10th frame */
1510 if (!strncmp(cbuf, "AVID", 4)) {
1512 if (len > 14 && cbuf[12] == 1) /* 1 - NTSC, 2 - PAL */
1513 s->interlace_polarity = 1;
1514 } else if (!strcmp(cbuf, "CS=ITU601"))
1516 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32)) ||
1517 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1527 /* return the 8 bit start code value and update the search
1528 state. Return -1 if no start code found */
1529 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1531 const uint8_t *buf_ptr;
1536 buf_ptr = *pbuf_ptr;
1537 while (buf_ptr < buf_end) {
1540 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1548 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1549 *pbuf_ptr = buf_ptr;
1553 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1554 const uint8_t **buf_ptr, const uint8_t *buf_end,
1555 const uint8_t **unescaped_buf_ptr,
1556 int *unescaped_buf_size)
1559 start_code = find_marker(buf_ptr, buf_end);
1561 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1563 return AVERROR(ENOMEM);
1565 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1566 if (start_code == SOS && !s->ls) {
1567 const uint8_t *src = *buf_ptr;
1568 uint8_t *dst = s->buffer;
1570 while (src < buf_end) {
1571 uint8_t x = *(src++);
1574 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1576 while (src < buf_end && x == 0xff)
1579 if (x >= 0xd0 && x <= 0xd7)
1586 *unescaped_buf_ptr = s->buffer;
1587 *unescaped_buf_size = dst - s->buffer;
1588 memset(s->buffer + *unescaped_buf_size, 0,
1589 FF_INPUT_BUFFER_PADDING_SIZE);
1591 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1592 (buf_end - *buf_ptr) - (dst - s->buffer));
1593 } else if (start_code == SOS && s->ls) {
1594 const uint8_t *src = *buf_ptr;
1595 uint8_t *dst = s->buffer;
1603 while (src + t < buf_end) {
1604 uint8_t x = src[t++];
1606 while ((src + t < buf_end) && x == 0xff)
1615 init_put_bits(&pb, dst, t);
1617 /* unescape bitstream */
1619 uint8_t x = src[b++];
1620 put_bits(&pb, 8, x);
1623 put_bits(&pb, 7, x);
1627 flush_put_bits(&pb);
1629 *unescaped_buf_ptr = dst;
1630 *unescaped_buf_size = (bit_count + 7) >> 3;
1631 memset(s->buffer + *unescaped_buf_size, 0,
1632 FF_INPUT_BUFFER_PADDING_SIZE);
1634 *unescaped_buf_ptr = *buf_ptr;
1635 *unescaped_buf_size = buf_end - *buf_ptr;
1641 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1644 const uint8_t *buf = avpkt->data;
1645 int buf_size = avpkt->size;
1646 MJpegDecodeContext *s = avctx->priv_data;
1647 const uint8_t *buf_end, *buf_ptr;
1648 const uint8_t *unescaped_buf_ptr;
1650 int unescaped_buf_size;
1656 buf_end = buf + buf_size;
1657 while (buf_ptr < buf_end) {
1658 /* find start next marker */
1659 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1661 &unescaped_buf_size);
1663 if (start_code < 0) {
1665 } else if (unescaped_buf_size > (1U<<28)) {
1666 av_log(avctx, AV_LOG_ERROR, "MJPEG packet 0x%x too big (0x%x/0x%x), corrupt data?\n",
1667 start_code, unescaped_buf_size, buf_size);
1668 return AVERROR_INVALIDDATA;
1670 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1671 start_code, buf_end - buf_ptr);
1672 if ((ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size)) < 0) {
1673 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
1677 s->start_code = start_code;
1678 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1679 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1681 /* process markers */
1682 if (start_code >= 0xd0 && start_code <= 0xd7)
1683 av_log(avctx, AV_LOG_DEBUG,
1684 "restart marker: %d\n", start_code & 0x0f);
1686 else if (start_code >= APP0 && start_code <= APP15)
1687 mjpeg_decode_app(s);
1689 else if (start_code == COM)
1690 mjpeg_decode_com(s);
1694 if (!CONFIG_JPEGLS_DECODER &&
1695 (start_code == SOF48 || start_code == LSE)) {
1696 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
1697 return AVERROR(ENOSYS);
1700 switch (start_code) {
1702 s->restart_interval = 0;
1703 s->restart_count = 0;
1704 /* nothing to do on SOI */
1707 ff_mjpeg_decode_dqt(s);
1710 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1711 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1720 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1727 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1734 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1741 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1745 if (!CONFIG_JPEGLS_DECODER ||
1746 (ret = ff_jpegls_decode_lse(s)) < 0)
1752 if (!s->got_picture) {
1753 av_log(avctx, AV_LOG_WARNING,
1754 "Found EOI before any SOF, ignoring\n");
1757 if (s->interlaced) {
1758 s->bottom_field ^= 1;
1759 /* if not bottom field, do not output image yet */
1760 if (s->bottom_field == !s->interlace_polarity)
1763 if ((ret = av_frame_ref(data, s->picture_ptr)) < 0)
1769 int qp = FFMAX3(s->qscale[0],
1772 int qpw = (s->width + 15) / 16;
1773 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
1775 memset(qp_table_buf->data, qp, qpw);
1776 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
1779 if(avctx->debug & FF_DEBUG_QP)
1780 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
1785 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1786 (avctx->err_recognition & AV_EF_EXPLODE))
1790 mjpeg_decode_dri(s);
1802 av_log(avctx, AV_LOG_ERROR,
1803 "mjpeg: unsupported coding type (%x)\n", start_code);
1807 /* eof process start code */
1808 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1809 av_log(avctx, AV_LOG_DEBUG,
1810 "marker parser used %d bytes (%d bits)\n",
1811 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1814 if (s->got_picture) {
1815 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1818 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1819 return AVERROR_INVALIDDATA;
1825 uint8_t *line = s->picture_ptr->data[s->upscale_h];
1826 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
1827 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1828 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
1829 avctx->pix_fmt == AV_PIX_FMT_YUV440P);
1830 for (i = 0; i < s->chroma_height; i++) {
1831 for (index = s->width - 1; index; index--)
1832 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
1833 line += s->linesize[s->upscale_h];
1837 uint8_t *dst = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(s->height - 1) * s->linesize[s->upscale_v]];
1839 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
1840 w = s->width >> hshift;
1841 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
1842 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1843 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
1844 avctx->pix_fmt == AV_PIX_FMT_YUV422P);
1845 for (i = s->height - 1; i; i--) {
1846 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[i / 2 * s->linesize[s->upscale_v]];
1847 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(i + 1) / 2 * s->linesize[s->upscale_v]];
1849 memcpy(dst, src1, w);
1851 for (index = 0; index < w; index++)
1852 dst[index] = (src1[index] + src2[index]) >> 1;
1854 dst -= s->linesize[s->upscale_v];
1857 if (s->flipped && (s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
1859 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
1860 for (index=0; index<4; index++) {
1861 uint8_t *dst = s->picture_ptr->data[index];
1864 if(index && index<3){
1865 w = FF_CEIL_RSHIFT(w, hshift);
1866 h = FF_CEIL_RSHIFT(h, vshift);
1869 uint8_t *dst2 = dst + s->linesize[index]*(h-1);
1870 for (i=0; i<h/2; i++) {
1872 FFSWAP(int, dst[j], dst2[j]);
1873 dst += s->linesize[index];
1874 dst2 -= s->linesize[index];
1880 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %td bytes\n",
1882 // return buf_end - buf_ptr;
1883 return buf_ptr - buf;
1886 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1888 MJpegDecodeContext *s = avctx->priv_data;
1892 av_frame_unref(s->picture_ptr);
1895 av_freep(&s->ljpeg_buffer);
1896 s->ljpeg_buffer_size = 0;
1898 for (i = 0; i < 3; i++) {
1899 for (j = 0; j < 4; j++)
1900 ff_free_vlc(&s->vlcs[i][j]);
1902 for (i = 0; i < MAX_COMPONENTS; i++) {
1903 av_freep(&s->blocks[i]);
1904 av_freep(&s->last_nnz[i]);
1909 static void decode_flush(AVCodecContext *avctx)
1911 MJpegDecodeContext *s = avctx->priv_data;
1915 #if CONFIG_MJPEG_DECODER
1916 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1917 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1918 static const AVOption options[] = {
1919 { "extern_huff", "Use external huffman table.",
1920 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
1924 static const AVClass mjpegdec_class = {
1925 .class_name = "MJPEG decoder",
1926 .item_name = av_default_item_name,
1928 .version = LIBAVUTIL_VERSION_INT,
1931 AVCodec ff_mjpeg_decoder = {
1933 .type = AVMEDIA_TYPE_VIDEO,
1934 .id = AV_CODEC_ID_MJPEG,
1935 .priv_data_size = sizeof(MJpegDecodeContext),
1936 .init = ff_mjpeg_decode_init,
1937 .close = ff_mjpeg_decode_end,
1938 .decode = ff_mjpeg_decode_frame,
1939 .flush = decode_flush,
1940 .capabilities = CODEC_CAP_DR1,
1942 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1943 .priv_class = &mjpegdec_class,
1946 #if CONFIG_THP_DECODER
1947 AVCodec ff_thp_decoder = {
1949 .type = AVMEDIA_TYPE_VIDEO,
1950 .id = AV_CODEC_ID_THP,
1951 .priv_data_size = sizeof(MJpegDecodeContext),
1952 .init = ff_mjpeg_decode_init,
1953 .close = ff_mjpeg_decode_end,
1954 .decode = ff_mjpeg_decode_frame,
1955 .flush = decode_flush,
1956 .capabilities = CODEC_CAP_DR1,
1958 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),