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"
40 #include "jpeglsdec.h"
43 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
44 const uint8_t *val_table, int nb_codes,
45 int use_static, int is_ac)
47 uint8_t huff_size[256] = { 0 };
48 uint16_t huff_code[256];
49 uint16_t huff_sym[256];
52 av_assert0(nb_codes <= 256);
54 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
56 for (i = 0; i < 256; i++)
57 huff_sym[i] = i + 16 * is_ac;
60 huff_sym[0] = 16 * 256;
62 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
63 huff_code, 2, 2, huff_sym, 2, 2, use_static);
66 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
68 build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
69 avpriv_mjpeg_val_dc, 12, 0, 0);
70 build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
71 avpriv_mjpeg_val_dc, 12, 0, 0);
72 build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
73 avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
74 build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
75 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
76 build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
77 avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
78 build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
79 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
82 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
84 MJpegDecodeContext *s = avctx->priv_data;
87 s->picture_ptr = &s->picture;
88 avcodec_get_frame_defaults(&s->picture);
91 ff_dsputil_init(&s->dsp, avctx);
92 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) {
104 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
105 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
106 if (ff_mjpeg_decode_dht(s)) {
107 av_log(avctx, AV_LOG_ERROR,
108 "error using external huffman table, switching back to internal\n");
109 build_basic_mjpeg_vlc(s);
112 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
113 s->interlace_polarity = 1; /* bottom field first */
114 av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
116 if (avctx->codec->id == AV_CODEC_ID_AMV)
123 /* quantize tables */
124 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
126 int len, index, i, j;
128 len = get_bits(&s->gb, 16) - 2;
131 /* only 8 bit precision handled */
132 if (get_bits(&s->gb, 4) != 0) {
133 av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
136 index = get_bits(&s->gb, 4);
139 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
140 /* read quant table */
141 for (i = 0; i < 64; i++) {
142 j = s->scantable.permutated[i];
143 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
146 // XXX FIXME finetune, and perhaps add dc too
147 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
148 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
149 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
150 index, s->qscale[index]);
156 /* decode huffman tables and build VLC decoders */
157 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
159 int len, index, i, class, n, v, code_max;
160 uint8_t bits_table[17];
161 uint8_t val_table[256];
164 len = get_bits(&s->gb, 16) - 2;
168 return AVERROR_INVALIDDATA;
169 class = get_bits(&s->gb, 4);
171 return AVERROR_INVALIDDATA;
172 index = get_bits(&s->gb, 4);
174 return AVERROR_INVALIDDATA;
176 for (i = 1; i <= 16; i++) {
177 bits_table[i] = get_bits(&s->gb, 8);
181 if (len < n || n > 256)
182 return AVERROR_INVALIDDATA;
185 for (i = 0; i < n; i++) {
186 v = get_bits(&s->gb, 8);
193 /* build VLC and flush previous vlc if present */
194 ff_free_vlc(&s->vlcs[class][index]);
195 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
196 class, index, code_max + 1);
197 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
198 code_max + 1, 0, class > 0)) < 0)
202 ff_free_vlc(&s->vlcs[2][index]);
203 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
204 code_max + 1, 0, 0)) < 0)
211 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
213 int len, nb_components, i, width, height, pix_fmt_id;
214 int h_count[MAX_COMPONENTS];
215 int v_count[MAX_COMPONENTS];
218 s->upscale_h = s->upscale_v = 0;
220 /* XXX: verify len field validity */
221 len = get_bits(&s->gb, 16);
222 s->bits = get_bits(&s->gb, 8);
226 if (s->bits == 9 && !s->pegasus_rct)
227 s->rct = 1; // FIXME ugly
229 if (s->bits != 8 && !s->lossless) {
230 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
234 if(s->lossless && s->avctx->lowres){
235 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
239 height = get_bits(&s->gb, 16);
240 width = get_bits(&s->gb, 16);
242 // HACK for odd_height.mov
243 if (s->interlaced && s->width == width && s->height == height + 1)
246 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
247 if (av_image_check_size(width, height, 0, s->avctx))
248 return AVERROR_INVALIDDATA;
250 nb_components = get_bits(&s->gb, 8);
251 if (nb_components <= 0 ||
252 nb_components > MAX_COMPONENTS)
254 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
255 if (nb_components != s->nb_components) {
256 av_log(s->avctx, AV_LOG_ERROR, "nb_components changing in interlaced picture\n");
257 return AVERROR_INVALIDDATA;
260 if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
261 av_log_missing_feature(s->avctx,
262 "For JPEG-LS anything except <= 8 bits/component"
263 " or 16-bit gray", 0);
264 return AVERROR_PATCHWELCOME;
266 s->nb_components = nb_components;
269 memset(h_count, 0, sizeof(h_count));
270 memset(v_count, 0, sizeof(v_count));
271 for (i = 0; i < nb_components; i++) {
273 s->component_id[i] = get_bits(&s->gb, 8) - 1;
274 h_count[i] = get_bits(&s->gb, 4);
275 v_count[i] = get_bits(&s->gb, 4);
276 /* compute hmax and vmax (only used in interleaved case) */
277 if (h_count[i] > s->h_max)
278 s->h_max = h_count[i];
279 if (v_count[i] > s->v_max)
280 s->v_max = v_count[i];
281 if (!h_count[i] || !v_count[i]) {
282 av_log(s->avctx, AV_LOG_ERROR, "h/v_count is 0\n");
285 s->quant_index[i] = get_bits(&s->gb, 8);
286 if (s->quant_index[i] >= 4) {
287 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
288 return AVERROR_INVALIDDATA;
290 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
291 i, h_count[i], v_count[i],
292 s->component_id[i], s->quant_index[i]);
295 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
296 av_log_missing_feature(s->avctx, "Subsampling in JPEG-LS", 0);
297 return AVERROR_PATCHWELCOME;
300 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && nb_components==3)
303 /* if different size, realloc/alloc picture */
304 if ( width != s->width || height != s->height
305 || memcmp(s->h_count, h_count, sizeof(h_count[0])*nb_components)
306 || memcmp(s->v_count, v_count, sizeof(v_count[0])*nb_components)) {
307 av_freep(&s->qscale_table);
311 memcpy(s->h_count, h_count, sizeof(h_count));
312 memcpy(s->v_count, v_count, sizeof(v_count));
316 /* test interlaced mode */
317 if (s->first_picture &&
318 s->org_height != 0 &&
319 s->height < ((s->org_height * 3) / 4)) {
321 s->bottom_field = s->interlace_polarity;
322 s->picture_ptr->interlaced_frame = 1;
323 s->picture_ptr->top_field_first = !s->interlace_polarity;
327 avcodec_set_dimensions(s->avctx, width, height);
329 s->qscale_table = av_mallocz((s->width + 15) / 16);
330 s->first_picture = 0;
333 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
334 if (s->progressive) {
335 av_log_ask_for_sample(s->avctx, "progressively coded interlaced pictures not supported\n");
336 return AVERROR_INVALIDDATA;
339 /* XXX: not complete test ! */
340 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
341 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
342 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
343 (s->h_count[3] << 4) | s->v_count[3];
344 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
345 /* NOTE we do not allocate pictures large enough for the possible
346 * padding of h/v_count being 4 */
347 if (!(pix_fmt_id & 0xD0D0D0D0))
348 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
349 if (!(pix_fmt_id & 0x0D0D0D0D))
350 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
352 switch (pix_fmt_id) {
355 s->avctx->pix_fmt = AV_PIX_FMT_BGR24;
357 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
358 s->avctx->pix_fmt = AV_PIX_FMT_GBR24P;
360 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
361 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
364 av_assert0(s->nb_components == 3);
368 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
369 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
371 s->upscale_h = (pix_fmt_id == 0x22122100);
372 s->chroma_height = s->height;
376 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
377 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
378 s->upscale_v = (pix_fmt_id == 0x22211200);
380 s->chroma_height = s->height;
383 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
384 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
387 s->chroma_height = s->height / 2;
391 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
393 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
398 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
399 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
400 s->upscale_h = (pix_fmt_id == 0x22211100) * 2 + (pix_fmt_id == 0x22112100);
401 s->chroma_height = s->height / 2;
404 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
405 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
409 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
410 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
411 s->upscale_v = (pix_fmt_id == 0x22121100) + 1;
414 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
415 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
418 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
419 return AVERROR_PATCHWELCOME;
421 if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
422 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
423 return AVERROR_PATCHWELCOME;
426 s->upscale_h = s->upscale_v = 0;
427 if (s->nb_components > 1)
428 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
429 else if (s->bits <= 8)
430 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
432 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
435 if (s->picture_ptr->data[0])
436 s->avctx->release_buffer(s->avctx, s->picture_ptr);
438 if (s->avctx->get_buffer(s->avctx, s->picture_ptr) < 0) {
439 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
442 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
443 s->picture_ptr->key_frame = 1;
446 for (i = 0; i < 3; i++)
447 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
449 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
450 s->width, s->height, s->linesize[0], s->linesize[1],
451 s->interlaced, s->avctx->height);
453 if (len != (8 + (3 * nb_components)))
454 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
457 /* totally blank picture as progressive JPEG will only add details to it */
458 if (s->progressive) {
459 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
460 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
461 for (i = 0; i < s->nb_components; i++) {
462 int size = bw * bh * s->h_count[i] * s->v_count[i];
463 av_freep(&s->blocks[i]);
464 av_freep(&s->last_nnz[i]);
465 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
466 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
467 s->block_stride[i] = bw * s->h_count[i];
469 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
474 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
477 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
479 av_log(s->avctx, AV_LOG_WARNING,
480 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
481 0, dc_index, &s->vlcs[0][dc_index]);
486 return get_xbits(&s->gb, code);
491 /* decode block and dequantize */
492 static int decode_block(MJpegDecodeContext *s, DCTELEM *block, int component,
493 int dc_index, int ac_index, int16_t *quant_matrix)
495 int code, i, j, level, val;
498 val = mjpeg_decode_dc(s, dc_index);
500 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
501 return AVERROR_INVALIDDATA;
503 val = val * quant_matrix[0] + s->last_dc[component];
504 s->last_dc[component] = val;
508 {OPEN_READER(re, &s->gb);
510 UPDATE_CACHE(re, &s->gb);
511 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
513 i += ((unsigned)code) >> 4;
516 if (code > MIN_CACHE_BITS - 16)
517 UPDATE_CACHE(re, &s->gb);
520 int cache = GET_CACHE(re, &s->gb);
521 int sign = (~cache) >> 31;
522 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
525 LAST_SKIP_BITS(re, &s->gb, code);
528 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
529 return AVERROR_INVALIDDATA;
531 j = s->scantable.permutated[i];
532 block[j] = level * quant_matrix[j];
535 CLOSE_READER(re, &s->gb);}
540 static int decode_dc_progressive(MJpegDecodeContext *s, DCTELEM *block,
541 int component, int dc_index,
542 int16_t *quant_matrix, int Al)
545 s->dsp.clear_block(block);
546 val = mjpeg_decode_dc(s, dc_index);
548 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
549 return AVERROR_INVALIDDATA;
551 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
552 s->last_dc[component] = val;
557 /* decode block and dequantize - progressive JPEG version */
558 static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block,
559 uint8_t *last_nnz, int ac_index,
560 int16_t *quant_matrix,
561 int ss, int se, int Al, int *EOBRUN)
563 int code, i, j, level, val, run;
571 OPEN_READER(re, &s->gb);
572 for (i = ss; ; i++) {
573 UPDATE_CACHE(re, &s->gb);
574 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
576 run = ((unsigned) code) >> 4;
580 if (code > MIN_CACHE_BITS - 16)
581 UPDATE_CACHE(re, &s->gb);
584 int cache = GET_CACHE(re, &s->gb);
585 int sign = (~cache) >> 31;
586 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
589 LAST_SKIP_BITS(re, &s->gb, code);
593 j = s->scantable.permutated[se];
594 block[j] = level * quant_matrix[j] << Al;
597 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
598 return AVERROR_INVALIDDATA;
600 j = s->scantable.permutated[i];
601 block[j] = level * quant_matrix[j] << Al;
603 if (run == 0xF) {// ZRL - skip 15 coefficients
606 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
607 return AVERROR_INVALIDDATA;
612 UPDATE_CACHE(re, &s->gb);
613 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
614 LAST_SKIP_BITS(re, &s->gb, run);
621 CLOSE_READER(re, &s->gb);
630 #define REFINE_BIT(j) { \
631 UPDATE_CACHE(re, &s->gb); \
632 sign = block[j] >> 15; \
633 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
634 ((quant_matrix[j] ^ sign) - sign) << Al; \
635 LAST_SKIP_BITS(re, &s->gb, 1); \
643 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
648 j = s->scantable.permutated[i]; \
651 else if (run-- == 0) \
655 /* decode block and dequantize - progressive JPEG refinement pass */
656 static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block,
658 int ac_index, int16_t *quant_matrix,
659 int ss, int se, int Al, int *EOBRUN)
661 int code, i = ss, j, sign, val, run;
662 int last = FFMIN(se, *last_nnz);
664 OPEN_READER(re, &s->gb);
669 UPDATE_CACHE(re, &s->gb);
670 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
673 run = ((unsigned) code) >> 4;
674 UPDATE_CACHE(re, &s->gb);
675 val = SHOW_UBITS(re, &s->gb, 1);
676 LAST_SKIP_BITS(re, &s->gb, 1);
678 j = s->scantable.permutated[i];
680 block[j] = ((quant_matrix[j]^val) - val) << Al;
684 CLOSE_READER(re, &s->gb);
688 run = ((unsigned) code) >> 4;
695 UPDATE_CACHE(re, &s->gb);
696 run += SHOW_UBITS(re, &s->gb, val);
697 LAST_SKIP_BITS(re, &s->gb, val);
709 for (; i <= last; i++) {
710 j = s->scantable.permutated[i];
714 CLOSE_READER(re, &s->gb);
721 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
724 uint16_t (*buffer)[4];
725 int left[3], top[3], topleft[3];
726 const int linesize = s->linesize[0];
727 const int mask = (1 << s->bits) - 1;
731 s->restart_count = s->restart_interval;
733 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
734 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
735 buffer = s->ljpeg_buffer;
737 for (i = 0; i < 3; i++)
738 buffer[0][i] = 1 << (s->bits - 1);
740 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
741 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
743 if (s->interlaced && s->bottom_field)
744 ptr += linesize >> 1;
746 for (i = 0; i < 3; i++)
747 top[i] = left[i] = topleft[i] = buffer[0][i];
749 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
750 int modified_predictor = predictor;
752 if (s->restart_interval && !s->restart_count){
753 s->restart_count = s->restart_interval;
757 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
759 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
760 modified_predictor = 1;
762 for (i=0;i<nb_components;i++) {
766 top[i] = buffer[mb_x][i];
768 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
770 dc = mjpeg_decode_dc(s, s->dc_index[i]);
774 left[i] = buffer[mb_x][i] =
775 mask & (pred + (dc << point_transform));
778 if (s->restart_interval && !--s->restart_count) {
779 align_get_bits(&s->gb);
780 skip_bits(&s->gb, 16); /* skip RSTn */
785 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
786 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
787 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
788 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
790 } else if (s->pegasus_rct) {
791 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
792 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
793 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
794 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
797 for(i=0; i<nb_components; i++) {
798 int c= s->comp_index[i];
799 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
800 ptr[3*mb_x+2-c] = buffer[mb_x][i];
808 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
812 const int nb_components=s->nb_components;
813 int bits= (s->bits+7)&~7;
817 point_transform += bits - s->bits;
819 av_assert0(nb_components==1 || nb_components==3);
821 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
822 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
823 if (s->restart_interval && !s->restart_count){
824 s->restart_count = s->restart_interval;
829 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
830 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
831 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
832 for (i = 0; i < nb_components; i++) {
835 int n, h, v, x, y, c, j, linesize;
837 c = s->comp_index[i];
842 linesize= s->linesize[c];
844 if(bits>8) linesize /= 2;
849 dc = mjpeg_decode_dc(s, s->dc_index[i]);
853 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
856 pred= 1 << (bits - 1);
862 pred= ptr[-linesize];
864 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
868 if (s->interlaced && s->bottom_field)
869 ptr += linesize >> 1;
870 pred &= (-1)<<(8-s->bits);
871 *ptr= pred + (dc << point_transform);
873 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
876 pred= 1 << (bits - 1);
882 pred= ptr16[-linesize];
884 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
888 if (s->interlaced && s->bottom_field)
889 ptr16 += linesize >> 1;
890 pred &= (-1)<<(16-s->bits);
891 *ptr16= pred + (dc << point_transform);
900 for (i = 0; i < nb_components; i++) {
903 int n, h, v, x, y, c, j, linesize, dc;
905 c = s->comp_index[i];
910 linesize = s->linesize[c];
912 if(bits>8) linesize /= 2;
914 for (j = 0; j < n; j++) {
917 dc = mjpeg_decode_dc(s, s->dc_index[i]);
921 ptr = s->picture.data[c] +
922 (linesize * (v * mb_y + y)) +
923 (h * mb_x + x); //FIXME optimize this crap
924 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
926 pred &= (-1)<<(8-s->bits);
927 *ptr = pred + (dc << point_transform);
929 ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
930 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
932 pred &= (-1)<<(16-s->bits);
933 *ptr16= pred + (dc << point_transform);
943 if (s->restart_interval && !--s->restart_count) {
944 align_get_bits(&s->gb);
945 skip_bits(&s->gb, 16); /* skip RSTn */
952 static av_always_inline void mjpeg_copy_block(uint8_t *dst, const uint8_t *src,
953 int linesize, int lowres)
956 case 0: copy_block8(dst, src, linesize, linesize, 8);
958 case 1: copy_block4(dst, src, linesize, linesize, 4);
960 case 2: copy_block2(dst, src, linesize, linesize, 2);
967 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
968 int Al, const uint8_t *mb_bitmask,
969 const AVFrame *reference)
972 uint8_t *data[MAX_COMPONENTS];
973 const uint8_t *reference_data[MAX_COMPONENTS];
974 int linesize[MAX_COMPONENTS];
975 GetBitContext mb_bitmask_gb;
978 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
980 if (s->flipped && s->avctx->lowres) {
981 av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with lowres\n");
985 for (i = 0; i < nb_components; i++) {
986 int c = s->comp_index[i];
987 data[c] = s->picture_ptr->data[c];
988 reference_data[c] = reference ? reference->data[c] : NULL;
989 linesize[c] = s->linesize[c];
990 s->coefs_finished[c] |= 1;
991 if (s->flipped && !(s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
992 // picture should be flipped upside-down for this codec
993 int offset = (linesize[c] * (s->v_scount[i] *
994 (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
996 reference_data[c] += offset;
1001 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1002 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1003 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1005 if (s->restart_interval && !s->restart_count)
1006 s->restart_count = s->restart_interval;
1008 if (get_bits_left(&s->gb) < 0) {
1009 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1010 -get_bits_left(&s->gb));
1011 return AVERROR_INVALIDDATA;
1013 for (i = 0; i < nb_components; i++) {
1015 int n, h, v, x, y, c, j;
1017 n = s->nb_blocks[i];
1018 c = s->comp_index[i];
1023 for (j = 0; j < n; j++) {
1024 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1025 (h * mb_x + x) * 8) >> s->avctx->lowres);
1027 if (s->interlaced && s->bottom_field)
1028 block_offset += linesize[c] >> 1;
1029 ptr = data[c] + block_offset;
1030 if (!s->progressive) {
1032 mjpeg_copy_block(ptr, reference_data[c] + block_offset,
1033 linesize[c], s->avctx->lowres);
1035 s->dsp.clear_block(s->block);
1036 if (decode_block(s, s->block, i,
1037 s->dc_index[i], s->ac_index[i],
1038 s->quant_matrixes[s->quant_index[c]]) < 0) {
1039 av_log(s->avctx, AV_LOG_ERROR,
1040 "error y=%d x=%d\n", mb_y, mb_x);
1041 return AVERROR_INVALIDDATA;
1043 s->dsp.idct_put(ptr, linesize[c], s->block);
1046 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1048 DCTELEM *block = s->blocks[c][block_idx];
1050 block[0] += get_bits1(&s->gb) *
1051 s->quant_matrixes[s->quant_index[c]][0] << Al;
1052 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1053 s->quant_matrixes[s->quant_index[c]],
1055 av_log(s->avctx, AV_LOG_ERROR,
1056 "error y=%d x=%d\n", mb_y, mb_x);
1057 return AVERROR_INVALIDDATA;
1060 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1061 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1062 mb_x, mb_y, x, y, c, s->bottom_field,
1063 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1071 if (s->restart_interval) {
1073 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
1074 align_get_bits(&s->gb);
1075 for (i = 0; i < nb_components; i++) /* reset dc */
1076 s->last_dc[i] = 1024;
1079 i = 8 + ((-get_bits_count(&s->gb)) & 7);
1081 if (show_bits(&s->gb, i) == (1 << i) - 1) {
1082 int pos = get_bits_count(&s->gb);
1083 align_get_bits(&s->gb);
1084 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
1085 skip_bits(&s->gb, 8);
1086 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
1087 for (i = 0; i < nb_components; i++) /* reset dc */
1088 s->last_dc[i] = 1024;
1090 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
1098 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1099 int se, int Ah, int Al)
1103 int c = s->comp_index[0];
1104 uint8_t *data = s->picture.data[c];
1105 int linesize = s->linesize[c];
1107 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
1110 av_log(s->avctx, AV_LOG_ERROR, "SE %d is too large\n", se);
1111 return AVERROR_INVALIDDATA;
1115 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
1116 last_scan = !~s->coefs_finished[c];
1119 if (s->interlaced && s->bottom_field)
1120 data += linesize >> 1;
1122 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1123 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1124 int block_idx = mb_y * s->block_stride[c];
1125 DCTELEM (*block)[64] = &s->blocks[c][block_idx];
1126 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1127 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1130 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1131 quant_matrix, ss, se, Al, &EOBRUN);
1133 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1134 quant_matrix, ss, se, Al, &EOBRUN);
1136 av_log(s->avctx, AV_LOG_ERROR,
1137 "error y=%d x=%d\n", mb_y, mb_x);
1138 return AVERROR_INVALIDDATA;
1142 s->dsp.idct_put(ptr, linesize, *block);
1143 ptr += 8 >> s->avctx->lowres;
1150 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1151 const AVFrame *reference)
1153 int len, nb_components, i, h, v, predictor, point_transform;
1155 const int block_size = s->lossless ? 1 : 8;
1156 int ilv, prev_shift;
1158 if (!s->got_picture) {
1159 av_log(s->avctx, AV_LOG_WARNING,
1160 "Can not process SOS before SOF, skipping\n");
1164 av_assert0(s->picture_ptr->data[0]);
1165 /* XXX: verify len field validity */
1166 len = get_bits(&s->gb, 16);
1167 nb_components = get_bits(&s->gb, 8);
1168 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1169 av_log(s->avctx, AV_LOG_ERROR,
1170 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1171 return AVERROR_PATCHWELCOME;
1173 if (len != 6 + 2 * nb_components) {
1174 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1175 return AVERROR_INVALIDDATA;
1177 for (i = 0; i < nb_components; i++) {
1178 id = get_bits(&s->gb, 8) - 1;
1179 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1180 /* find component index */
1181 for (index = 0; index < s->nb_components; index++)
1182 if (id == s->component_id[index])
1184 if (index == s->nb_components) {
1185 av_log(s->avctx, AV_LOG_ERROR,
1186 "decode_sos: index(%d) out of components\n", index);
1187 return AVERROR_INVALIDDATA;
1189 /* Metasoft MJPEG codec has Cb and Cr swapped */
1190 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1191 && nb_components == 3 && s->nb_components == 3 && i)
1194 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1196 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1197 index = (index+2)%3;
1199 s->comp_index[i] = index;
1201 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1202 s->h_scount[i] = s->h_count[index];
1203 s->v_scount[i] = s->v_count[index];
1205 s->dc_index[i] = get_bits(&s->gb, 4);
1206 s->ac_index[i] = get_bits(&s->gb, 4);
1208 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1209 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1211 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))
1215 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1216 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1217 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1218 prev_shift = get_bits(&s->gb, 4); /* Ah */
1219 point_transform = get_bits(&s->gb, 4); /* Al */
1221 prev_shift = point_transform = 0;
1223 if (nb_components > 1) {
1224 /* interleaved stream */
1225 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1226 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1227 } else if (!s->ls) { /* skip this for JPEG-LS */
1228 h = s->h_max / s->h_scount[0];
1229 v = s->v_max / s->v_scount[0];
1230 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1231 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1232 s->nb_blocks[0] = 1;
1237 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1238 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1239 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1240 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1241 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1244 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1245 for (i = s->mjpb_skiptosod; i > 0; i--)
1246 skip_bits(&s->gb, 8);
1249 for (i = 0; i < nb_components; i++)
1250 s->last_dc[i] = 1024;
1253 av_assert0(s->picture_ptr == &s->picture);
1254 if (CONFIG_JPEGLS_DECODER && s->ls) {
1256 // reset_ls_coding_parameters(s, 0);
1258 if ((ret = ff_jpegls_decode_picture(s, predictor,
1259 point_transform, ilv)) < 0)
1263 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1266 if ((ret = ljpeg_decode_yuv_scan(s, predictor, point_transform)) < 0)
1271 if (s->progressive && predictor) {
1272 av_assert0(s->picture_ptr == &s->picture);
1273 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1275 point_transform)) < 0)
1278 if ((ret = mjpeg_decode_scan(s, nb_components,
1279 prev_shift, point_transform,
1280 mb_bitmask, reference)) < 0)
1285 if (s->interlaced &&
1286 get_bits_left(&s->gb) > 32 &&
1287 show_bits(&s->gb, 8) == 0xFF) {
1288 GetBitContext bak = s->gb;
1289 align_get_bits(&bak);
1290 if (show_bits(&bak, 16) == 0xFFD1) {
1291 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1293 skip_bits(&s->gb, 16);
1294 s->bottom_field ^= 1;
1303 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1304 return AVERROR_INVALIDDATA;
1307 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1309 if (get_bits(&s->gb, 16) != 4)
1310 return AVERROR_INVALIDDATA;
1311 s->restart_interval = get_bits(&s->gb, 16);
1312 s->restart_count = 0;
1313 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1314 s->restart_interval);
1319 static int mjpeg_decode_app(MJpegDecodeContext *s)
1323 len = get_bits(&s->gb, 16);
1325 return AVERROR_INVALIDDATA;
1326 if (8 * len > get_bits_left(&s->gb))
1327 return AVERROR_INVALIDDATA;
1329 id = get_bits_long(&s->gb, 32);
1330 id = av_be2ne32(id);
1333 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1334 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1336 /* Buggy AVID, it puts EOI only at every 10th frame. */
1337 /* Also, this fourcc is used by non-avid files too, it holds some
1338 information, but it's always present in AVID-created files. */
1339 if (id == AV_RL32("AVI1")) {
1345 4bytes field_size_less_padding
1348 i = get_bits(&s->gb, 8); len--;
1349 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1351 skip_bits(&s->gb, 8);
1352 skip_bits(&s->gb, 32);
1353 skip_bits(&s->gb, 32);
1361 if (id == AV_RL32("JFIF")) {
1362 int t_w, t_h, v1, v2;
1363 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1364 v1 = get_bits(&s->gb, 8);
1365 v2 = get_bits(&s->gb, 8);
1366 skip_bits(&s->gb, 8);
1368 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1369 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1371 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1372 av_log(s->avctx, AV_LOG_INFO,
1373 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1375 s->avctx->sample_aspect_ratio.num,
1376 s->avctx->sample_aspect_ratio.den);
1378 t_w = get_bits(&s->gb, 8);
1379 t_h = get_bits(&s->gb, 8);
1381 /* skip thumbnail */
1382 if (len -10 - (t_w * t_h * 3) > 0)
1383 len -= t_w * t_h * 3;
1389 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1390 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1391 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1392 skip_bits(&s->gb, 16); /* version */
1393 skip_bits(&s->gb, 16); /* flags0 */
1394 skip_bits(&s->gb, 16); /* flags1 */
1395 skip_bits(&s->gb, 8); /* transform */
1400 if (id == AV_RL32("LJIF")) {
1401 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1402 av_log(s->avctx, AV_LOG_INFO,
1403 "Pegasus lossless jpeg header found\n");
1404 skip_bits(&s->gb, 16); /* version ? */
1405 skip_bits(&s->gb, 16); /* unknwon always 0? */
1406 skip_bits(&s->gb, 16); /* unknwon always 0? */
1407 skip_bits(&s->gb, 16); /* unknwon always 0? */
1408 switch (get_bits(&s->gb, 8)) {
1418 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1425 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1426 id = get_bits_long(&s->gb, 32);
1427 id = av_be2ne32(id);
1430 if (id == AV_RL32("mjpg")) {
1432 skip_bits(&s->gb, 32); /* field size */
1433 skip_bits(&s->gb, 32); /* pad field size */
1434 skip_bits(&s->gb, 32); /* next off */
1435 skip_bits(&s->gb, 32); /* quant off */
1436 skip_bits(&s->gb, 32); /* huff off */
1437 skip_bits(&s->gb, 32); /* image off */
1438 skip_bits(&s->gb, 32); /* scan off */
1439 skip_bits(&s->gb, 32); /* data off */
1441 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1442 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1447 /* slow but needed for extreme adobe jpegs */
1449 av_log(s->avctx, AV_LOG_ERROR,
1450 "mjpeg: error, decode_app parser read over the end\n");
1452 skip_bits(&s->gb, 8);
1457 static int mjpeg_decode_com(MJpegDecodeContext *s)
1459 int len = get_bits(&s->gb, 16);
1460 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1461 char *cbuf = av_malloc(len - 1);
1464 for (i = 0; i < len - 2; i++)
1465 cbuf[i] = get_bits(&s->gb, 8);
1466 if (i > 0 && cbuf[i - 1] == '\n')
1471 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1472 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1474 /* buggy avid, it puts EOI only at every 10th frame */
1475 if (!strcmp(cbuf, "AVID")) {
1477 } else if (!strcmp(cbuf, "CS=ITU601"))
1479 else if ((len > 31 && !strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32)) ||
1480 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1490 /* return the 8 bit start code value and update the search
1491 state. Return -1 if no start code found */
1492 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1494 const uint8_t *buf_ptr;
1499 buf_ptr = *pbuf_ptr;
1500 while (buf_ptr < buf_end) {
1503 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1511 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1512 *pbuf_ptr = buf_ptr;
1516 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1517 const uint8_t **buf_ptr, const uint8_t *buf_end,
1518 const uint8_t **unescaped_buf_ptr,
1519 int *unescaped_buf_size)
1522 start_code = find_marker(buf_ptr, buf_end);
1524 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1526 return AVERROR(ENOMEM);
1528 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1529 if (start_code == SOS && !s->ls) {
1530 const uint8_t *src = *buf_ptr;
1531 uint8_t *dst = s->buffer;
1533 while (src < buf_end) {
1534 uint8_t x = *(src++);
1537 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1539 while (src < buf_end && x == 0xff)
1542 if (x >= 0xd0 && x <= 0xd7)
1549 *unescaped_buf_ptr = s->buffer;
1550 *unescaped_buf_size = dst - s->buffer;
1552 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1553 (buf_end - *buf_ptr) - (dst - s->buffer));
1554 } else if (start_code == SOS && s->ls) {
1555 const uint8_t *src = *buf_ptr;
1556 uint8_t *dst = s->buffer;
1564 while (src + t < buf_end) {
1565 uint8_t x = src[t++];
1567 while ((src + t < buf_end) && x == 0xff)
1576 init_put_bits(&pb, dst, t);
1578 /* unescape bitstream */
1580 uint8_t x = src[b++];
1581 put_bits(&pb, 8, x);
1584 put_bits(&pb, 7, x);
1588 flush_put_bits(&pb);
1590 *unescaped_buf_ptr = dst;
1591 *unescaped_buf_size = (bit_count + 7) >> 3;
1593 *unescaped_buf_ptr = *buf_ptr;
1594 *unescaped_buf_size = buf_end - *buf_ptr;
1600 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
1603 const uint8_t *buf = avpkt->data;
1604 int buf_size = avpkt->size;
1605 MJpegDecodeContext *s = avctx->priv_data;
1606 const uint8_t *buf_end, *buf_ptr;
1607 const uint8_t *unescaped_buf_ptr;
1608 int unescaped_buf_size;
1612 AVFrame *picture = data;
1615 buf_end = buf + buf_size;
1616 while (buf_ptr < buf_end) {
1617 /* find start next marker */
1618 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1620 &unescaped_buf_size);
1622 if (start_code < 0) {
1624 } else if (unescaped_buf_size > (1U<<28)) {
1625 av_log(avctx, AV_LOG_ERROR, "MJPEG packet 0x%x too big (0x%x/0x%x), corrupt data?\n",
1626 start_code, unescaped_buf_size, buf_size);
1627 return AVERROR_INVALIDDATA;
1629 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1630 start_code, buf_end - buf_ptr);
1632 init_get_bits(&s->gb, unescaped_buf_ptr, unescaped_buf_size * 8);
1634 s->start_code = start_code;
1635 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1636 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1638 /* process markers */
1639 if (start_code >= 0xd0 && start_code <= 0xd7)
1640 av_log(avctx, AV_LOG_DEBUG,
1641 "restart marker: %d\n", start_code & 0x0f);
1643 else if (start_code >= APP0 && start_code <= APP15)
1644 mjpeg_decode_app(s);
1646 else if (start_code == COM)
1647 mjpeg_decode_com(s);
1650 switch (start_code) {
1652 s->restart_interval = 0;
1653 s->restart_count = 0;
1654 /* nothing to do on SOI */
1657 ff_mjpeg_decode_dqt(s);
1660 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1661 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1670 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1677 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1684 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1691 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1695 if (!CONFIG_JPEGLS_DECODER ||
1696 (ret = ff_jpegls_decode_lse(s)) < 0)
1702 if (!s->got_picture) {
1703 av_log(avctx, AV_LOG_WARNING,
1704 "Found EOI before any SOF, ignoring\n");
1707 if (s->interlaced) {
1708 s->bottom_field ^= 1;
1709 /* if not bottom field, do not output image yet */
1710 if (s->bottom_field == !s->interlace_polarity)
1713 *picture = *s->picture_ptr;
1714 *data_size = sizeof(AVFrame);
1718 picture->quality = FFMAX3(s->qscale[0],
1721 picture->qstride = 0;
1722 picture->qscale_table = s->qscale_table;
1723 memset(picture->qscale_table, picture->quality,
1724 (s->width + 15) / 16);
1725 if (avctx->debug & FF_DEBUG_QP)
1726 av_log(avctx, AV_LOG_DEBUG,
1727 "QP: %d\n", picture->quality);
1728 picture->quality *= FF_QP2LAMBDA;
1733 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1734 (avctx->err_recognition & AV_EF_EXPLODE))
1738 mjpeg_decode_dri(s);
1750 av_log(avctx, AV_LOG_ERROR,
1751 "mjpeg: unsupported coding type (%x)\n", start_code);
1755 /* eof process start code */
1756 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1757 av_log(avctx, AV_LOG_DEBUG,
1758 "marker parser used %d bytes (%d bits)\n",
1759 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1762 if (s->got_picture) {
1763 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1766 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1767 return AVERROR_INVALIDDATA;
1773 uint8_t *line = s->picture_ptr->data[s->upscale_h];
1774 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
1775 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1776 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
1777 avctx->pix_fmt == AV_PIX_FMT_YUV440P);
1778 for (i = 0; i < s->chroma_height; i++) {
1779 for (index = s->width - 1; index; index--)
1780 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
1781 line += s->linesize[s->upscale_h];
1785 uint8_t *dst = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(s->height - 1) * s->linesize[s->upscale_v]];
1786 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
1787 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1788 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
1789 avctx->pix_fmt == AV_PIX_FMT_YUV422P);
1790 for (i = s->height - 1; i; i--) {
1791 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[i / 2 * s->linesize[s->upscale_v]];
1792 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(i + 1) / 2 * s->linesize[s->upscale_v]];
1794 memcpy(dst, src1, s->width);
1796 for (index = 0; index < s->width; index++)
1797 dst[index] = (src1[index] + src2[index]) >> 1;
1799 dst -= s->linesize[s->upscale_v];
1802 if (s->flipped && (s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
1803 int hshift, vshift, j;
1804 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
1805 for (index=0; index<4; index++) {
1806 uint8_t *dst = s->picture_ptr->data[index];
1809 if(index && index<3){
1810 w = -((-w) >> hshift);
1811 h = -((-h) >> vshift);
1814 uint8_t *dst2 = dst + s->linesize[index]*(h-1);
1815 for (i=0; i<h/2; i++) {
1817 FFSWAP(int, dst[j], dst2[j]);
1818 dst += s->linesize[index];
1819 dst2 -= s->linesize[index];
1825 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %td bytes\n",
1827 // return buf_end - buf_ptr;
1828 return buf_ptr - buf;
1831 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1833 MJpegDecodeContext *s = avctx->priv_data;
1836 if (s->picture_ptr && s->picture_ptr->data[0])
1837 avctx->release_buffer(avctx, s->picture_ptr);
1840 av_free(s->qscale_table);
1841 av_freep(&s->ljpeg_buffer);
1842 s->ljpeg_buffer_size = 0;
1844 for (i = 0; i < 3; i++) {
1845 for (j = 0; j < 4; j++)
1846 ff_free_vlc(&s->vlcs[i][j]);
1848 for (i = 0; i < MAX_COMPONENTS; i++) {
1849 av_freep(&s->blocks[i]);
1850 av_freep(&s->last_nnz[i]);
1855 static void decode_flush(AVCodecContext *avctx)
1857 MJpegDecodeContext *s = avctx->priv_data;
1861 #if CONFIG_MJPEG_DECODER
1862 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1863 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1864 static const AVOption options[] = {
1865 { "extern_huff", "Use external huffman table.",
1866 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
1870 static const AVClass mjpegdec_class = {
1871 .class_name = "MJPEG decoder",
1872 .item_name = av_default_item_name,
1874 .version = LIBAVUTIL_VERSION_INT,
1877 AVCodec ff_mjpeg_decoder = {
1879 .type = AVMEDIA_TYPE_VIDEO,
1880 .id = AV_CODEC_ID_MJPEG,
1881 .priv_data_size = sizeof(MJpegDecodeContext),
1882 .init = ff_mjpeg_decode_init,
1883 .close = ff_mjpeg_decode_end,
1884 .decode = ff_mjpeg_decode_frame,
1885 .flush = decode_flush,
1886 .capabilities = CODEC_CAP_DR1,
1888 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1889 .priv_class = &mjpegdec_class,
1892 #if CONFIG_THP_DECODER
1893 AVCodec ff_thp_decoder = {
1895 .type = AVMEDIA_TYPE_VIDEO,
1896 .id = AV_CODEC_ID_THP,
1897 .priv_data_size = sizeof(MJpegDecodeContext),
1898 .init = ff_mjpeg_decode_init,
1899 .close = ff_mjpeg_decode_end,
1900 .decode = ff_mjpeg_decode_frame,
1901 .flush = decode_flush,
1902 .capabilities = CODEC_CAP_DR1,
1904 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),