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"
38 #include "copy_block.h"
43 #include "jpeglsdec.h"
46 #include "bytestream.h"
49 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
50 const uint8_t *val_table, int nb_codes,
51 int use_static, int is_ac)
53 uint8_t huff_size[256] = { 0 };
54 uint16_t huff_code[256];
55 uint16_t huff_sym[256];
58 av_assert0(nb_codes <= 256);
60 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
62 for (i = 0; i < 256; i++)
63 huff_sym[i] = i + 16 * is_ac;
66 huff_sym[0] = 16 * 256;
68 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
69 huff_code, 2, 2, huff_sym, 2, 2, use_static);
72 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
74 build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
75 avpriv_mjpeg_val_dc, 12, 0, 0);
76 build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
77 avpriv_mjpeg_val_dc, 12, 0, 0);
78 build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
79 avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
80 build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
81 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
82 build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
83 avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
84 build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
85 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
88 static void parse_avid(MJpegDecodeContext *s, uint8_t *buf, int len)
91 if (len > 14 && buf[12] == 1) /* 1 - NTSC */
92 s->interlace_polarity = 1;
93 if (len > 14 && buf[12] == 2) /* 2 - PAL */
94 s->interlace_polarity = 0;
95 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
96 av_log(s->avctx, AV_LOG_INFO, "AVID: len:%d %d\n", len, len > 14 ? buf[12] : -1);
99 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
101 MJpegDecodeContext *s = avctx->priv_data;
103 if (!s->picture_ptr) {
104 s->picture = av_frame_alloc();
106 return AVERROR(ENOMEM);
107 s->picture_ptr = s->picture;
111 ff_blockdsp_init(&s->bdsp, avctx);
112 ff_hpeldsp_init(&s->hdsp, avctx->flags);
113 ff_idctdsp_init(&s->idsp, avctx);
114 ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
119 s->first_picture = 1;
121 s->org_height = avctx->coded_height;
122 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
123 avctx->colorspace = AVCOL_SPC_BT470BG;
125 build_basic_mjpeg_vlc(s);
127 if (s->extern_huff) {
128 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
129 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
130 if (ff_mjpeg_decode_dht(s)) {
131 av_log(avctx, AV_LOG_ERROR,
132 "error using external huffman table, switching back to internal\n");
133 build_basic_mjpeg_vlc(s);
136 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
137 s->interlace_polarity = 1; /* bottom field first */
138 av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
139 } else if (avctx->field_order == AV_FIELD_UNKNOWN) {
140 if (avctx->codec_tag == AV_RL32("MJPG"))
141 s->interlace_polarity = 1;
144 if ( avctx->extradata_size > 8
145 && AV_RL32(avctx->extradata) == 0x2C
146 && AV_RL32(avctx->extradata+4) == 0x18) {
147 parse_avid(s, avctx->extradata, avctx->extradata_size);
150 if (avctx->codec->id == AV_CODEC_ID_AMV)
157 /* quantize tables */
158 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
160 int len, index, i, j;
162 len = get_bits(&s->gb, 16) - 2;
165 int pr = get_bits(&s->gb, 4);
167 av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
168 return AVERROR_INVALIDDATA;
170 index = get_bits(&s->gb, 4);
173 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
174 /* read quant table */
175 for (i = 0; i < 64; i++) {
176 j = s->scantable.permutated[i];
177 s->quant_matrixes[index][j] = get_bits(&s->gb, pr ? 16 : 8);
180 // XXX FIXME finetune, and perhaps add dc too
181 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
182 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
183 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
184 index, s->qscale[index]);
190 /* decode huffman tables and build VLC decoders */
191 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
193 int len, index, i, class, n, v, code_max;
194 uint8_t bits_table[17];
195 uint8_t val_table[256];
198 len = get_bits(&s->gb, 16) - 2;
202 return AVERROR_INVALIDDATA;
203 class = get_bits(&s->gb, 4);
205 return AVERROR_INVALIDDATA;
206 index = get_bits(&s->gb, 4);
208 return AVERROR_INVALIDDATA;
210 for (i = 1; i <= 16; i++) {
211 bits_table[i] = get_bits(&s->gb, 8);
215 if (len < n || n > 256)
216 return AVERROR_INVALIDDATA;
219 for (i = 0; i < n; i++) {
220 v = get_bits(&s->gb, 8);
227 /* build VLC and flush previous vlc if present */
228 ff_free_vlc(&s->vlcs[class][index]);
229 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
230 class, index, code_max + 1);
231 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
232 code_max + 1, 0, class > 0)) < 0)
236 ff_free_vlc(&s->vlcs[2][index]);
237 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
238 code_max + 1, 0, 0)) < 0)
245 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
247 int len, nb_components, i, width, height, bits, pix_fmt_id, ret;
248 int h_count[MAX_COMPONENTS];
249 int v_count[MAX_COMPONENTS];
252 s->upscale_h = s->upscale_v = 0;
254 /* XXX: verify len field validity */
255 len = get_bits(&s->gb, 16);
256 s->avctx->bits_per_raw_sample =
257 bits = get_bits(&s->gb, 8);
259 if (bits > 16 || bits < 1) {
260 av_log(s->avctx, AV_LOG_ERROR, "bits %d is invalid\n", bits);
261 return AVERROR_INVALIDDATA;
266 if (bits == 9 && !s->pegasus_rct)
267 s->rct = 1; // FIXME ugly
269 if(s->lossless && s->avctx->lowres){
270 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
274 height = get_bits(&s->gb, 16);
275 width = get_bits(&s->gb, 16);
277 if (s->avctx->codec_id == AV_CODEC_ID_AMV && (height&15))
278 avpriv_request_sample(s->avctx, "non mod 16 height AMV\n");
280 // HACK for odd_height.mov
281 if (s->interlaced && s->width == width && s->height == height + 1)
284 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
285 if (av_image_check_size(width, height, 0, s->avctx))
286 return AVERROR_INVALIDDATA;
288 nb_components = get_bits(&s->gb, 8);
289 if (nb_components <= 0 ||
290 nb_components > MAX_COMPONENTS)
292 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
293 if (nb_components != s->nb_components) {
294 av_log(s->avctx, AV_LOG_ERROR,
295 "nb_components changing in interlaced picture\n");
296 return AVERROR_INVALIDDATA;
299 if (s->ls && !(bits <= 8 || nb_components == 1)) {
300 avpriv_report_missing_feature(s->avctx,
301 "JPEG-LS that is not <= 8 "
302 "bits/component or 16-bit gray");
303 return AVERROR_PATCHWELCOME;
305 s->nb_components = nb_components;
308 memset(h_count, 0, sizeof(h_count));
309 memset(v_count, 0, sizeof(v_count));
310 for (i = 0; i < nb_components; i++) {
312 s->component_id[i] = get_bits(&s->gb, 8) - 1;
313 h_count[i] = get_bits(&s->gb, 4);
314 v_count[i] = get_bits(&s->gb, 4);
315 /* compute hmax and vmax (only used in interleaved case) */
316 if (h_count[i] > s->h_max)
317 s->h_max = h_count[i];
318 if (v_count[i] > s->v_max)
319 s->v_max = v_count[i];
320 s->quant_index[i] = get_bits(&s->gb, 8);
321 if (s->quant_index[i] >= 4) {
322 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
323 return AVERROR_INVALIDDATA;
325 if (!h_count[i] || !v_count[i]) {
326 av_log(s->avctx, AV_LOG_ERROR,
327 "Invalid sampling factor in component %d %d:%d\n",
328 i, h_count[i], v_count[i]);
329 return AVERROR_INVALIDDATA;
332 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
333 i, h_count[i], v_count[i],
334 s->component_id[i], s->quant_index[i]);
337 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
338 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
339 return AVERROR_PATCHWELCOME;
343 /* if different size, realloc/alloc picture */
344 if ( width != s->width || height != s->height
346 || memcmp(s->h_count, h_count, sizeof(h_count))
347 || memcmp(s->v_count, v_count, sizeof(v_count))) {
352 memcpy(s->h_count, h_count, sizeof(h_count));
353 memcpy(s->v_count, v_count, sizeof(v_count));
357 /* test interlaced mode */
358 if (s->first_picture &&
359 s->org_height != 0 &&
360 s->height < ((s->org_height * 3) / 4)) {
362 s->bottom_field = s->interlace_polarity;
363 s->picture_ptr->interlaced_frame = 1;
364 s->picture_ptr->top_field_first = !s->interlace_polarity;
368 ret = ff_set_dimensions(s->avctx, width, height);
372 s->first_picture = 0;
375 if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
376 if (s->progressive) {
377 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
378 return AVERROR_INVALIDDATA;
381 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
383 else if (!s->lossless)
385 /* XXX: not complete test ! */
386 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
387 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
388 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
389 (s->h_count[3] << 4) | s->v_count[3];
390 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
391 /* NOTE we do not allocate pictures large enough for the possible
392 * padding of h/v_count being 4 */
393 if (!(pix_fmt_id & 0xD0D0D0D0))
394 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
395 if (!(pix_fmt_id & 0x0D0D0D0D))
396 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
398 for (i = 0; i < 8; i++) {
399 int j = 6 + (i&1) - (i&6);
400 int is = (pix_fmt_id >> (4*i)) & 0xF;
401 int js = (pix_fmt_id >> (4*j)) & 0xF;
403 if (is == 1 && js != 2 && (i < 2 || i > 5))
404 js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
405 if (is == 1 && js != 2 && (i < 2 || i > 5))
406 js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
408 if (is == 1 && js == 2) {
409 if (i & 1) s->upscale_h |= 1 << (j/2);
410 else s->upscale_v |= 1 << (j/2);
414 switch (pix_fmt_id) {
417 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
419 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
420 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
422 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
423 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
424 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
427 av_assert0(s->nb_components == 3);
431 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
433 if (s->adobe_transform == 0 && s->bits <= 8) {
434 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
436 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
437 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
440 av_assert0(s->nb_components == 4);
444 if (s->adobe_transform == 0 && s->bits <= 8) {
445 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
448 } else if (s->adobe_transform == 2 && s->bits <= 8) {
449 s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
452 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
454 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
455 else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
456 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
458 av_assert0(s->nb_components == 4);
464 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
467 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
472 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
475 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
487 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
489 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
496 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
497 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
502 if (pix_fmt_id == 0x14111100)
504 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
507 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
511 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
512 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
517 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
518 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
519 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
524 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
527 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
532 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
533 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
534 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
535 if (pix_fmt_id == 0x42111100) {
537 } else if (pix_fmt_id == 0x24111100) {
542 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
545 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
549 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
550 s->upscale_h = s->upscale_v = 0;
551 return AVERROR_PATCHWELCOME;
553 if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
554 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
555 return AVERROR_PATCHWELCOME;
558 s->upscale_h = s->upscale_v = 0;
559 if (s->nb_components > 1)
560 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
561 else if (s->palette_index && s->bits <= 8)
562 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
563 else if (s->bits <= 8)
564 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
566 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
569 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
571 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
575 av_frame_unref(s->picture_ptr);
576 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
578 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
579 s->picture_ptr->key_frame = 1;
582 for (i = 0; i < 4; i++)
583 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
585 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
586 s->width, s->height, s->linesize[0], s->linesize[1],
587 s->interlaced, s->avctx->height);
589 if (len != (8 + (3 * nb_components)))
590 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
593 if (s->rgb && !s->lossless && !s->ls) {
594 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
595 return AVERROR_PATCHWELCOME;
598 /* totally blank picture as progressive JPEG will only add details to it */
599 if (s->progressive) {
600 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
601 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
602 for (i = 0; i < s->nb_components; i++) {
603 int size = bw * bh * s->h_count[i] * s->v_count[i];
604 av_freep(&s->blocks[i]);
605 av_freep(&s->last_nnz[i]);
606 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
607 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
608 if (!s->blocks[i] || !s->last_nnz[i])
609 return AVERROR(ENOMEM);
610 s->block_stride[i] = bw * s->h_count[i];
612 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
617 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
620 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
621 if (code < 0 || code > 16) {
622 av_log(s->avctx, AV_LOG_WARNING,
623 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
624 0, dc_index, &s->vlcs[0][dc_index]);
629 return get_xbits(&s->gb, code);
634 /* decode block and dequantize */
635 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
636 int dc_index, int ac_index, int16_t *quant_matrix)
638 int code, i, j, level, val;
641 val = mjpeg_decode_dc(s, dc_index);
642 if (val == 0xfffff) {
643 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
644 return AVERROR_INVALIDDATA;
646 val = val * quant_matrix[0] + s->last_dc[component];
647 s->last_dc[component] = val;
651 {OPEN_READER(re, &s->gb);
653 UPDATE_CACHE(re, &s->gb);
654 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
656 i += ((unsigned)code) >> 4;
659 if (code > MIN_CACHE_BITS - 16)
660 UPDATE_CACHE(re, &s->gb);
663 int cache = GET_CACHE(re, &s->gb);
664 int sign = (~cache) >> 31;
665 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
668 LAST_SKIP_BITS(re, &s->gb, code);
671 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
672 return AVERROR_INVALIDDATA;
674 j = s->scantable.permutated[i];
675 block[j] = level * quant_matrix[j];
678 CLOSE_READER(re, &s->gb);}
683 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
684 int component, int dc_index,
685 int16_t *quant_matrix, int Al)
688 s->bdsp.clear_block(block);
689 val = mjpeg_decode_dc(s, dc_index);
690 if (val == 0xfffff) {
691 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
692 return AVERROR_INVALIDDATA;
694 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
695 s->last_dc[component] = val;
700 /* decode block and dequantize - progressive JPEG version */
701 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
702 uint8_t *last_nnz, int ac_index,
703 int16_t *quant_matrix,
704 int ss, int se, int Al, int *EOBRUN)
706 int code, i, j, level, val, run;
714 OPEN_READER(re, &s->gb);
715 for (i = ss; ; i++) {
716 UPDATE_CACHE(re, &s->gb);
717 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
719 run = ((unsigned) code) >> 4;
723 if (code > MIN_CACHE_BITS - 16)
724 UPDATE_CACHE(re, &s->gb);
727 int cache = GET_CACHE(re, &s->gb);
728 int sign = (~cache) >> 31;
729 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
732 LAST_SKIP_BITS(re, &s->gb, code);
736 j = s->scantable.permutated[se];
737 block[j] = level * quant_matrix[j] << Al;
740 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
741 return AVERROR_INVALIDDATA;
743 j = s->scantable.permutated[i];
744 block[j] = level * quant_matrix[j] << Al;
746 if (run == 0xF) {// ZRL - skip 15 coefficients
749 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
750 return AVERROR_INVALIDDATA;
755 UPDATE_CACHE(re, &s->gb);
756 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
757 LAST_SKIP_BITS(re, &s->gb, run);
764 CLOSE_READER(re, &s->gb);
773 #define REFINE_BIT(j) { \
774 UPDATE_CACHE(re, &s->gb); \
775 sign = block[j] >> 15; \
776 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
777 ((quant_matrix[j] ^ sign) - sign) << Al; \
778 LAST_SKIP_BITS(re, &s->gb, 1); \
786 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
791 j = s->scantable.permutated[i]; \
794 else if (run-- == 0) \
798 /* decode block and dequantize - progressive JPEG refinement pass */
799 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
801 int ac_index, int16_t *quant_matrix,
802 int ss, int se, int Al, int *EOBRUN)
804 int code, i = ss, j, sign, val, run;
805 int last = FFMIN(se, *last_nnz);
807 OPEN_READER(re, &s->gb);
812 UPDATE_CACHE(re, &s->gb);
813 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
816 run = ((unsigned) code) >> 4;
817 UPDATE_CACHE(re, &s->gb);
818 val = SHOW_UBITS(re, &s->gb, 1);
819 LAST_SKIP_BITS(re, &s->gb, 1);
821 j = s->scantable.permutated[i];
823 block[j] = ((quant_matrix[j]^val) - val) << Al;
827 CLOSE_READER(re, &s->gb);
831 run = ((unsigned) code) >> 4;
838 UPDATE_CACHE(re, &s->gb);
839 run += SHOW_UBITS(re, &s->gb, val);
840 LAST_SKIP_BITS(re, &s->gb, val);
852 for (; i <= last; i++) {
853 j = s->scantable.permutated[i];
857 CLOSE_READER(re, &s->gb);
864 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
869 if (s->restart_interval) {
871 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
872 align_get_bits(&s->gb);
873 for (i = 0; i < nb_components; i++) /* reset dc */
874 s->last_dc[i] = (4 << s->bits);
877 i = 8 + ((-get_bits_count(&s->gb)) & 7);
879 if (s->restart_count == 0) {
880 if( show_bits(&s->gb, i) == (1 << i) - 1
881 || show_bits(&s->gb, i) == 0xFF) {
882 int pos = get_bits_count(&s->gb);
883 align_get_bits(&s->gb);
884 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
885 skip_bits(&s->gb, 8);
886 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
887 for (i = 0; i < nb_components; i++) /* reset dc */
888 s->last_dc[i] = (4 << s->bits);
891 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
898 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
901 uint16_t (*buffer)[4];
902 int left[4], top[4], topleft[4];
903 const int linesize = s->linesize[0];
904 const int mask = ((1 << s->bits) - 1) << point_transform;
908 if (s->nb_components != 3 && s->nb_components != 4)
909 return AVERROR_INVALIDDATA;
910 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
911 return AVERROR_INVALIDDATA;
914 s->restart_count = s->restart_interval;
916 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
917 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
918 buffer = s->ljpeg_buffer;
920 for (i = 0; i < 4; i++)
921 buffer[0][i] = 1 << (s->bits - 1);
923 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
924 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
926 if (s->interlaced && s->bottom_field)
927 ptr += linesize >> 1;
929 for (i = 0; i < 4; i++)
930 top[i] = left[i] = topleft[i] = buffer[0][i];
932 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
933 int modified_predictor = predictor;
935 if (s->restart_interval && !s->restart_count){
936 s->restart_count = s->restart_interval;
940 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
942 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
943 modified_predictor = 1;
945 for (i=0;i<nb_components;i++) {
949 top[i] = buffer[mb_x][i];
951 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
953 dc = mjpeg_decode_dc(s, s->dc_index[i]);
957 left[i] = buffer[mb_x][i] =
958 mask & (pred + (dc << point_transform));
961 if (s->restart_interval && !--s->restart_count) {
962 align_get_bits(&s->gb);
963 skip_bits(&s->gb, 16); /* skip RSTn */
966 if (s->nb_components == 4) {
967 for(i=0; i<nb_components; i++) {
968 int c= s->comp_index[i];
970 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
971 ptr[4*mb_x+3-c] = buffer[mb_x][i];
973 } else if(s->bits == 9) {
974 return AVERROR_PATCHWELCOME;
976 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
977 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
982 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
983 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
984 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
985 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
987 } else if (s->pegasus_rct) {
988 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
989 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
990 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
991 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
994 for(i=0; i<nb_components; i++) {
995 int c= s->comp_index[i];
997 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
998 ptr[3*mb_x+2-c] = buffer[mb_x][i];
1000 } else if(s->bits == 9) {
1001 return AVERROR_PATCHWELCOME;
1003 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1004 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
1013 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1014 int point_transform, int nb_components)
1016 int i, mb_x, mb_y, mask;
1017 int bits= (s->bits+7)&~7;
1018 int resync_mb_y = 0;
1019 int resync_mb_x = 0;
1021 point_transform += bits - s->bits;
1022 mask = ((1 << s->bits) - 1) << point_transform;
1024 av_assert0(nb_components>=1 && nb_components<=4);
1026 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1027 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1028 if (s->restart_interval && !s->restart_count){
1029 s->restart_count = s->restart_interval;
1034 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1035 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1036 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1037 for (i = 0; i < nb_components; i++) {
1040 int n, h, v, x, y, c, j, linesize;
1041 n = s->nb_blocks[i];
1042 c = s->comp_index[i];
1047 linesize= s->linesize[c];
1049 if(bits>8) linesize /= 2;
1051 for(j=0; j<n; j++) {
1054 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1058 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1060 if(x==0 && leftcol){
1061 pred= 1 << (bits - 1);
1066 if(x==0 && leftcol){
1067 pred= ptr[-linesize];
1069 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1073 if (s->interlaced && s->bottom_field)
1074 ptr += linesize >> 1;
1076 *ptr= pred + (dc << point_transform);
1078 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1080 if(x==0 && leftcol){
1081 pred= 1 << (bits - 1);
1086 if(x==0 && leftcol){
1087 pred= ptr16[-linesize];
1089 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1093 if (s->interlaced && s->bottom_field)
1094 ptr16 += linesize >> 1;
1096 *ptr16= pred + (dc << point_transform);
1105 for (i = 0; i < nb_components; i++) {
1108 int n, h, v, x, y, c, j, linesize, dc;
1109 n = s->nb_blocks[i];
1110 c = s->comp_index[i];
1115 linesize = s->linesize[c];
1117 if(bits>8) linesize /= 2;
1119 for (j = 0; j < n; j++) {
1122 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1126 ptr = s->picture_ptr->data[c] +
1127 (linesize * (v * mb_y + y)) +
1128 (h * mb_x + x); //FIXME optimize this crap
1129 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1132 *ptr = pred + (dc << point_transform);
1134 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1135 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1138 *ptr16= pred + (dc << point_transform);
1148 if (s->restart_interval && !--s->restart_count) {
1149 align_get_bits(&s->gb);
1150 skip_bits(&s->gb, 16); /* skip RSTn */
1157 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1158 uint8_t *dst, const uint8_t *src,
1159 int linesize, int lowres)
1162 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1164 case 1: copy_block4(dst, src, linesize, linesize, 4);
1166 case 2: copy_block2(dst, src, linesize, linesize, 2);
1168 case 3: *dst = *src;
1173 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1175 int block_x, block_y;
1176 int size = 8 >> s->avctx->lowres;
1178 for (block_y=0; block_y<size; block_y++)
1179 for (block_x=0; block_x<size; block_x++)
1180 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1182 for (block_y=0; block_y<size; block_y++)
1183 for (block_x=0; block_x<size; block_x++)
1184 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1188 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1189 int Al, const uint8_t *mb_bitmask,
1190 int mb_bitmask_size,
1191 const AVFrame *reference)
1194 uint8_t *data[MAX_COMPONENTS];
1195 const uint8_t *reference_data[MAX_COMPONENTS];
1196 int linesize[MAX_COMPONENTS];
1197 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1198 int bytes_per_pixel = 1 + (s->bits > 8);
1201 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1202 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1203 return AVERROR_INVALIDDATA;
1205 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1208 s->restart_count = 0;
1210 for (i = 0; i < nb_components; i++) {
1211 int c = s->comp_index[i];
1212 data[c] = s->picture_ptr->data[c];
1213 reference_data[c] = reference ? reference->data[c] : NULL;
1214 linesize[c] = s->linesize[c];
1215 s->coefs_finished[c] |= 1;
1218 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1219 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1220 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1222 if (s->restart_interval && !s->restart_count)
1223 s->restart_count = s->restart_interval;
1225 if (get_bits_left(&s->gb) < 0) {
1226 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1227 -get_bits_left(&s->gb));
1228 return AVERROR_INVALIDDATA;
1230 for (i = 0; i < nb_components; i++) {
1232 int n, h, v, x, y, c, j;
1234 n = s->nb_blocks[i];
1235 c = s->comp_index[i];
1240 for (j = 0; j < n; j++) {
1241 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1242 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1244 if (s->interlaced && s->bottom_field)
1245 block_offset += linesize[c] >> 1;
1246 ptr = data[c] + block_offset;
1247 if (!s->progressive) {
1249 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1250 linesize[c], s->avctx->lowres);
1253 s->bdsp.clear_block(s->block);
1254 if (decode_block(s, s->block, i,
1255 s->dc_index[i], s->ac_index[i],
1256 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1257 av_log(s->avctx, AV_LOG_ERROR,
1258 "error y=%d x=%d\n", mb_y, mb_x);
1259 return AVERROR_INVALIDDATA;
1261 s->idsp.idct_put(ptr, linesize[c], s->block);
1263 shift_output(s, ptr, linesize[c]);
1266 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1268 int16_t *block = s->blocks[c][block_idx];
1270 block[0] += get_bits1(&s->gb) *
1271 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1272 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1273 s->quant_matrixes[s->quant_sindex[i]],
1275 av_log(s->avctx, AV_LOG_ERROR,
1276 "error y=%d x=%d\n", mb_y, mb_x);
1277 return AVERROR_INVALIDDATA;
1280 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1281 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1282 mb_x, mb_y, x, y, c, s->bottom_field,
1283 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1291 handle_rstn(s, nb_components);
1297 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1298 int se, int Ah, int Al)
1302 int c = s->comp_index[0];
1303 uint8_t *data = s->picture_ptr->data[c];
1304 int linesize = s->linesize[c];
1306 int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1307 int bytes_per_pixel = 1 + (s->bits > 8);
1309 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1310 if (se < ss || se > 63) {
1311 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1312 return AVERROR_INVALIDDATA;
1316 // s->coefs_finished is a bitmask for coefficients coded
1317 // ss and se are parameters telling start and end coefficients
1318 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1319 last_scan = !~s->coefs_finished[c];
1322 if (s->interlaced && s->bottom_field)
1323 data += linesize >> 1;
1325 s->restart_count = 0;
1327 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1328 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1329 int block_idx = mb_y * s->block_stride[c];
1330 int16_t (*block)[64] = &s->blocks[c][block_idx];
1331 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1332 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1334 if (s->restart_interval && !s->restart_count)
1335 s->restart_count = s->restart_interval;
1338 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1339 quant_matrix, ss, se, Al, &EOBRUN);
1341 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1342 quant_matrix, ss, se, Al, &EOBRUN);
1344 av_log(s->avctx, AV_LOG_ERROR,
1345 "error y=%d x=%d\n", mb_y, mb_x);
1346 return AVERROR_INVALIDDATA;
1350 s->idsp.idct_put(ptr, linesize, *block);
1352 shift_output(s, ptr, linesize);
1353 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1355 if (handle_rstn(s, 0))
1362 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1363 int mb_bitmask_size, const AVFrame *reference)
1365 int len, nb_components, i, h, v, predictor, point_transform;
1367 const int block_size = s->lossless ? 1 : 8;
1368 int ilv, prev_shift;
1370 if (!s->got_picture) {
1371 av_log(s->avctx, AV_LOG_WARNING,
1372 "Can not process SOS before SOF, skipping\n");
1376 av_assert0(s->picture_ptr->data[0]);
1377 /* XXX: verify len field validity */
1378 len = get_bits(&s->gb, 16);
1379 nb_components = get_bits(&s->gb, 8);
1380 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1381 av_log(s->avctx, AV_LOG_ERROR,
1382 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1383 return AVERROR_PATCHWELCOME;
1385 if (len != 6 + 2 * nb_components) {
1386 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1387 return AVERROR_INVALIDDATA;
1389 for (i = 0; i < nb_components; i++) {
1390 id = get_bits(&s->gb, 8) - 1;
1391 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1392 /* find component index */
1393 for (index = 0; index < s->nb_components; index++)
1394 if (id == s->component_id[index])
1396 if (index == s->nb_components) {
1397 av_log(s->avctx, AV_LOG_ERROR,
1398 "decode_sos: index(%d) out of components\n", index);
1399 return AVERROR_INVALIDDATA;
1401 /* Metasoft MJPEG codec has Cb and Cr swapped */
1402 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1403 && nb_components == 3 && s->nb_components == 3 && i)
1406 s->quant_sindex[i] = s->quant_index[index];
1407 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1408 s->h_scount[i] = s->h_count[index];
1409 s->v_scount[i] = s->v_count[index];
1411 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1413 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1414 index = (index+2)%3;
1416 s->comp_index[i] = index;
1418 s->dc_index[i] = get_bits(&s->gb, 4);
1419 s->ac_index[i] = get_bits(&s->gb, 4);
1421 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1422 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1424 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))
1428 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1429 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1430 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1431 prev_shift = get_bits(&s->gb, 4); /* Ah */
1432 point_transform = get_bits(&s->gb, 4); /* Al */
1434 prev_shift = point_transform = 0;
1436 if (nb_components > 1) {
1437 /* interleaved stream */
1438 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1439 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1440 } else if (!s->ls) { /* skip this for JPEG-LS */
1441 h = s->h_max / s->h_scount[0];
1442 v = s->v_max / s->v_scount[0];
1443 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1444 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1445 s->nb_blocks[0] = 1;
1450 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1451 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1452 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1453 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1454 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1457 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1458 for (i = s->mjpb_skiptosod; i > 0; i--)
1459 skip_bits(&s->gb, 8);
1462 for (i = 0; i < nb_components; i++)
1463 s->last_dc[i] = (4 << s->bits);
1466 av_assert0(s->picture_ptr == s->picture);
1467 if (CONFIG_JPEGLS_DECODER && s->ls) {
1469 // reset_ls_coding_parameters(s, 0);
1471 if ((ret = ff_jpegls_decode_picture(s, predictor,
1472 point_transform, ilv)) < 0)
1476 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1479 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1481 nb_components)) < 0)
1486 if (s->progressive && predictor) {
1487 av_assert0(s->picture_ptr == s->picture);
1488 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1490 point_transform)) < 0)
1493 if ((ret = mjpeg_decode_scan(s, nb_components,
1494 prev_shift, point_transform,
1495 mb_bitmask, mb_bitmask_size, reference)) < 0)
1500 if (s->interlaced &&
1501 get_bits_left(&s->gb) > 32 &&
1502 show_bits(&s->gb, 8) == 0xFF) {
1503 GetBitContext bak = s->gb;
1504 align_get_bits(&bak);
1505 if (show_bits(&bak, 16) == 0xFFD1) {
1506 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1508 skip_bits(&s->gb, 16);
1509 s->bottom_field ^= 1;
1518 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1519 return AVERROR_INVALIDDATA;
1522 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1524 if (get_bits(&s->gb, 16) != 4)
1525 return AVERROR_INVALIDDATA;
1526 s->restart_interval = get_bits(&s->gb, 16);
1527 s->restart_count = 0;
1528 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1529 s->restart_interval);
1534 static int mjpeg_decode_app(MJpegDecodeContext *s)
1538 len = get_bits(&s->gb, 16);
1540 return AVERROR_INVALIDDATA;
1541 if (8 * len > get_bits_left(&s->gb))
1542 return AVERROR_INVALIDDATA;
1544 id = get_bits_long(&s->gb, 32);
1547 if (s->avctx->debug & FF_DEBUG_STARTCODE) {
1549 av_get_codec_tag_string(id_str, sizeof(id_str), av_bswap32(id));
1550 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n", id_str, id, len);
1553 /* Buggy AVID, it puts EOI only at every 10th frame. */
1554 /* Also, this fourcc is used by non-avid files too, it holds some
1555 information, but it's always present in AVID-created files. */
1556 if (id == AV_RB32("AVI1")) {
1562 4bytes field_size_less_padding
1565 i = get_bits(&s->gb, 8); len--;
1566 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1568 skip_bits(&s->gb, 8);
1569 skip_bits(&s->gb, 32);
1570 skip_bits(&s->gb, 32);
1578 if (id == AV_RB32("JFIF")) {
1579 int t_w, t_h, v1, v2;
1580 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1581 v1 = get_bits(&s->gb, 8);
1582 v2 = get_bits(&s->gb, 8);
1583 skip_bits(&s->gb, 8);
1585 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1586 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1587 ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
1589 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1590 av_log(s->avctx, AV_LOG_INFO,
1591 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1593 s->avctx->sample_aspect_ratio.num,
1594 s->avctx->sample_aspect_ratio.den);
1596 t_w = get_bits(&s->gb, 8);
1597 t_h = get_bits(&s->gb, 8);
1599 /* skip thumbnail */
1600 if (len -10 - (t_w * t_h * 3) > 0)
1601 len -= t_w * t_h * 3;
1607 if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1608 skip_bits(&s->gb, 16); /* version */
1609 skip_bits(&s->gb, 16); /* flags0 */
1610 skip_bits(&s->gb, 16); /* flags1 */
1611 s->adobe_transform = get_bits(&s->gb, 8);
1612 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1613 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1618 if (id == AV_RB32("LJIF")) {
1619 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1620 av_log(s->avctx, AV_LOG_INFO,
1621 "Pegasus lossless jpeg header found\n");
1622 skip_bits(&s->gb, 16); /* version ? */
1623 skip_bits(&s->gb, 16); /* unknown always 0? */
1624 skip_bits(&s->gb, 16); /* unknown always 0? */
1625 skip_bits(&s->gb, 16); /* unknown always 0? */
1626 switch (i=get_bits(&s->gb, 8)) {
1636 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1641 if (id == AV_RL32("colr") && len > 0) {
1642 s->colr = get_bits(&s->gb, 8);
1643 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1644 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1648 if (id == AV_RL32("xfrm") && len > 0) {
1649 s->xfrm = get_bits(&s->gb, 8);
1650 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1651 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1656 /* JPS extension by VRex */
1657 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1658 int flags, layout, type;
1659 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1660 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1662 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1663 skip_bits(&s->gb, 16); len -= 2; /* block length */
1664 skip_bits(&s->gb, 8); /* reserved */
1665 flags = get_bits(&s->gb, 8);
1666 layout = get_bits(&s->gb, 8);
1667 type = get_bits(&s->gb, 8);
1670 s->stereo3d = av_stereo3d_alloc();
1675 s->stereo3d->type = AV_STEREO3D_2D;
1676 } else if (type == 1) {
1679 s->stereo3d->type = AV_STEREO3D_LINES;
1682 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1685 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1688 if (!(flags & 0x04)) {
1689 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1696 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1697 GetByteContext gbytes;
1698 int ret, le, ifd_offset, bytes_read;
1699 const uint8_t *aligned;
1701 skip_bits(&s->gb, 16); // skip padding
1704 // init byte wise reading
1705 aligned = align_get_bits(&s->gb);
1706 bytestream2_init(&gbytes, aligned, len);
1709 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1711 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1713 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1715 // read 0th IFD and store the metadata
1716 // (return values > 0 indicate the presence of subimage metadata)
1717 ret = avpriv_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1719 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1723 bytes_read = bytestream2_tell(&gbytes);
1724 skip_bits(&s->gb, bytes_read << 3);
1731 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1732 id = get_bits_long(&s->gb, 32);
1735 if (id == AV_RB32("mjpg")) {
1737 skip_bits(&s->gb, 32); /* field size */
1738 skip_bits(&s->gb, 32); /* pad field size */
1739 skip_bits(&s->gb, 32); /* next off */
1740 skip_bits(&s->gb, 32); /* quant off */
1741 skip_bits(&s->gb, 32); /* huff off */
1742 skip_bits(&s->gb, 32); /* image off */
1743 skip_bits(&s->gb, 32); /* scan off */
1744 skip_bits(&s->gb, 32); /* data off */
1746 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1747 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1752 /* slow but needed for extreme adobe jpegs */
1754 av_log(s->avctx, AV_LOG_ERROR,
1755 "mjpeg: error, decode_app parser read over the end\n");
1757 skip_bits(&s->gb, 8);
1762 static int mjpeg_decode_com(MJpegDecodeContext *s)
1764 int len = get_bits(&s->gb, 16);
1765 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1766 char *cbuf = av_malloc(len - 1);
1769 for (i = 0; i < len - 2; i++)
1770 cbuf[i] = get_bits(&s->gb, 8);
1771 if (i > 0 && cbuf[i - 1] == '\n')
1776 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1777 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1779 /* buggy avid, it puts EOI only at every 10th frame */
1780 if (!strncmp(cbuf, "AVID", 4)) {
1781 parse_avid(s, cbuf, len);
1782 } else if (!strcmp(cbuf, "CS=ITU601"))
1784 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
1785 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1795 /* return the 8 bit start code value and update the search
1796 state. Return -1 if no start code found */
1797 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1799 const uint8_t *buf_ptr;
1804 buf_ptr = *pbuf_ptr;
1805 while (buf_end - buf_ptr > 1) {
1808 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1817 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1818 *pbuf_ptr = buf_ptr;
1822 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1823 const uint8_t **buf_ptr, const uint8_t *buf_end,
1824 const uint8_t **unescaped_buf_ptr,
1825 int *unescaped_buf_size)
1828 start_code = find_marker(buf_ptr, buf_end);
1830 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1832 return AVERROR(ENOMEM);
1834 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1835 if (start_code == SOS && !s->ls) {
1836 const uint8_t *src = *buf_ptr;
1837 uint8_t *dst = s->buffer;
1839 while (src < buf_end) {
1840 uint8_t x = *(src++);
1843 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1845 while (src < buf_end && x == 0xff)
1848 if (x >= 0xd0 && x <= 0xd7)
1855 *unescaped_buf_ptr = s->buffer;
1856 *unescaped_buf_size = dst - s->buffer;
1857 memset(s->buffer + *unescaped_buf_size, 0,
1858 FF_INPUT_BUFFER_PADDING_SIZE);
1860 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
1861 (buf_end - *buf_ptr) - (dst - s->buffer));
1862 } else if (start_code == SOS && s->ls) {
1863 const uint8_t *src = *buf_ptr;
1864 uint8_t *dst = s->buffer;
1870 while (src + t < buf_end) {
1871 uint8_t x = src[t++];
1873 while ((src + t < buf_end) && x == 0xff)
1882 init_put_bits(&pb, dst, t);
1884 /* unescape bitstream */
1886 uint8_t x = src[b++];
1887 put_bits(&pb, 8, x);
1890 put_bits(&pb, 7, x);
1894 flush_put_bits(&pb);
1896 *unescaped_buf_ptr = dst;
1897 *unescaped_buf_size = (bit_count + 7) >> 3;
1898 memset(s->buffer + *unescaped_buf_size, 0,
1899 FF_INPUT_BUFFER_PADDING_SIZE);
1901 *unescaped_buf_ptr = *buf_ptr;
1902 *unescaped_buf_size = buf_end - *buf_ptr;
1908 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1911 AVFrame *frame = data;
1912 const uint8_t *buf = avpkt->data;
1913 int buf_size = avpkt->size;
1914 MJpegDecodeContext *s = avctx->priv_data;
1915 const uint8_t *buf_end, *buf_ptr;
1916 const uint8_t *unescaped_buf_ptr;
1918 int unescaped_buf_size;
1924 av_dict_free(&s->exif_metadata);
1925 av_freep(&s->stereo3d);
1926 s->adobe_transform = -1;
1929 buf_end = buf + buf_size;
1930 while (buf_ptr < buf_end) {
1931 /* find start next marker */
1932 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1934 &unescaped_buf_size);
1936 if (start_code < 0) {
1938 } else if (unescaped_buf_size > INT_MAX / 8) {
1939 av_log(avctx, AV_LOG_ERROR,
1940 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1941 start_code, unescaped_buf_size, buf_size);
1942 return AVERROR_INVALIDDATA;
1944 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
1945 start_code, buf_end - buf_ptr);
1947 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
1950 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
1954 s->start_code = start_code;
1955 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1956 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1958 /* process markers */
1959 if (start_code >= 0xd0 && start_code <= 0xd7)
1960 av_log(avctx, AV_LOG_DEBUG,
1961 "restart marker: %d\n", start_code & 0x0f);
1963 else if (start_code >= APP0 && start_code <= APP15)
1964 mjpeg_decode_app(s);
1966 else if (start_code == COM)
1967 mjpeg_decode_com(s);
1971 if (!CONFIG_JPEGLS_DECODER &&
1972 (start_code == SOF48 || start_code == LSE)) {
1973 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
1974 return AVERROR(ENOSYS);
1977 switch (start_code) {
1979 s->restart_interval = 0;
1980 s->restart_count = 0;
1981 /* nothing to do on SOI */
1984 ff_mjpeg_decode_dqt(s);
1987 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1988 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1997 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2004 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2011 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2018 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2022 if (!CONFIG_JPEGLS_DECODER ||
2023 (ret = ff_jpegls_decode_lse(s)) < 0)
2029 if (!s->got_picture) {
2030 av_log(avctx, AV_LOG_WARNING,
2031 "Found EOI before any SOF, ignoring\n");
2034 if (s->interlaced) {
2035 s->bottom_field ^= 1;
2036 /* if not bottom field, do not output image yet */
2037 if (s->bottom_field == !s->interlace_polarity)
2040 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2046 int qp = FFMAX3(s->qscale[0],
2049 int qpw = (s->width + 15) / 16;
2050 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2052 memset(qp_table_buf->data, qp, qpw);
2053 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2056 if(avctx->debug & FF_DEBUG_QP)
2057 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2063 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2064 (avctx->err_recognition & AV_EF_EXPLODE))
2068 mjpeg_decode_dri(s);
2080 av_log(avctx, AV_LOG_ERROR,
2081 "mjpeg: unsupported coding type (%x)\n", start_code);
2085 /* eof process start code */
2086 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2087 av_log(avctx, AV_LOG_DEBUG,
2088 "marker parser used %d bytes (%d bits)\n",
2089 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2091 if (s->got_picture && s->cur_scan) {
2092 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2095 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2096 return AVERROR_INVALIDDATA;
2102 is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step_minus1;
2106 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2107 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2108 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2109 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2110 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2111 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2112 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2113 avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2114 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2115 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2117 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2118 for (p = 0; p<4; p++) {
2119 uint8_t *line = s->picture_ptr->data[p];
2122 if (!(s->upscale_h & (1<<p)))
2125 w = FF_CEIL_RSHIFT(w, hshift);
2126 h = FF_CEIL_RSHIFT(h, vshift);
2128 if (s->upscale_v & (1<<p))
2131 for (i = 0; i < h; i++) {
2132 if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2133 else line[w - 1] = line[(w - 1) / 2];
2134 for (index = w - 2; index > 0; index--) {
2136 ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2138 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2140 line += s->linesize[p];
2146 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2147 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2148 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2149 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2150 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2151 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2152 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2153 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2154 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2155 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2156 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2158 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2159 for (p = 0; p < 4; p++) {
2163 if (!(s->upscale_v & (1<<p)))
2166 w = FF_CEIL_RSHIFT(w, hshift);
2167 h = FF_CEIL_RSHIFT(h, vshift);
2169 dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2170 for (i = h - 1; i; i--) {
2171 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2172 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2173 if (src1 == src2 || i == h - 1) {
2174 memcpy(dst, src1, w);
2176 for (index = 0; index < w; index++)
2177 dst[index] = (src1[index] + src2[index]) >> 1;
2179 dst -= s->linesize[p];
2185 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2186 for (index=0; index<4; index++) {
2187 uint8_t *dst = s->picture_ptr->data[index];
2188 int w = s->picture_ptr->width;
2189 int h = s->picture_ptr->height;
2190 if(index && index<3){
2191 w = FF_CEIL_RSHIFT(w, hshift);
2192 h = FF_CEIL_RSHIFT(h, vshift);
2195 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2196 for (i=0; i<h/2; i++) {
2198 FFSWAP(int, dst[j], dst2[j]);
2199 dst += s->picture_ptr->linesize[index];
2200 dst2 -= s->picture_ptr->linesize[index];
2205 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2206 int w = s->picture_ptr->width;
2207 int h = s->picture_ptr->height;
2208 for (i=0; i<h; i++) {
2211 for (index=0; index<4; index++) {
2212 dst[index] = s->picture_ptr->data[index]
2213 + s->picture_ptr->linesize[index]*i;
2215 for (j=0; j<w; j++) {
2217 int r = dst[0][j] * k;
2218 int g = dst[1][j] * k;
2219 int b = dst[2][j] * k;
2220 dst[0][j] = g*257 >> 16;
2221 dst[1][j] = b*257 >> 16;
2222 dst[2][j] = r*257 >> 16;
2227 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2228 int w = s->picture_ptr->width;
2229 int h = s->picture_ptr->height;
2230 for (i=0; i<h; i++) {
2233 for (index=0; index<4; index++) {
2234 dst[index] = s->picture_ptr->data[index]
2235 + s->picture_ptr->linesize[index]*i;
2237 for (j=0; j<w; j++) {
2239 int r = (255 - dst[0][j]) * k;
2240 int g = (128 - dst[1][j]) * k;
2241 int b = (128 - dst[2][j]) * k;
2242 dst[0][j] = r*257 >> 16;
2243 dst[1][j] = (g*257 >> 16) + 128;
2244 dst[2][j] = (b*257 >> 16) + 128;
2251 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2253 stereo->type = s->stereo3d->type;
2254 stereo->flags = s->stereo3d->flags;
2256 av_freep(&s->stereo3d);
2259 av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
2260 av_dict_free(&s->exif_metadata);
2262 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2264 // return buf_end - buf_ptr;
2265 return buf_ptr - buf;
2268 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2270 MJpegDecodeContext *s = avctx->priv_data;
2273 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2274 av_log(avctx, AV_LOG_INFO, "Single field\n");
2278 av_frame_free(&s->picture);
2279 s->picture_ptr = NULL;
2280 } else if (s->picture_ptr)
2281 av_frame_unref(s->picture_ptr);
2283 av_freep(&s->buffer);
2284 av_freep(&s->stereo3d);
2285 av_freep(&s->ljpeg_buffer);
2286 s->ljpeg_buffer_size = 0;
2288 for (i = 0; i < 3; i++) {
2289 for (j = 0; j < 4; j++)
2290 ff_free_vlc(&s->vlcs[i][j]);
2292 for (i = 0; i < MAX_COMPONENTS; i++) {
2293 av_freep(&s->blocks[i]);
2294 av_freep(&s->last_nnz[i]);
2296 av_dict_free(&s->exif_metadata);
2300 static void decode_flush(AVCodecContext *avctx)
2302 MJpegDecodeContext *s = avctx->priv_data;
2306 #if CONFIG_MJPEG_DECODER
2307 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2308 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2309 static const AVOption options[] = {
2310 { "extern_huff", "Use external huffman table.",
2311 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
2315 static const AVClass mjpegdec_class = {
2316 .class_name = "MJPEG decoder",
2317 .item_name = av_default_item_name,
2319 .version = LIBAVUTIL_VERSION_INT,
2322 AVCodec ff_mjpeg_decoder = {
2324 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2325 .type = AVMEDIA_TYPE_VIDEO,
2326 .id = AV_CODEC_ID_MJPEG,
2327 .priv_data_size = sizeof(MJpegDecodeContext),
2328 .init = ff_mjpeg_decode_init,
2329 .close = ff_mjpeg_decode_end,
2330 .decode = ff_mjpeg_decode_frame,
2331 .flush = decode_flush,
2332 .capabilities = CODEC_CAP_DR1,
2334 .priv_class = &mjpegdec_class,
2337 #if CONFIG_THP_DECODER
2338 AVCodec ff_thp_decoder = {
2340 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2341 .type = AVMEDIA_TYPE_VIDEO,
2342 .id = AV_CODEC_ID_THP,
2343 .priv_data_size = sizeof(MJpegDecodeContext),
2344 .init = ff_mjpeg_decode_init,
2345 .close = ff_mjpeg_decode_end,
2346 .decode = ff_mjpeg_decode_frame,
2347 .flush = decode_flush,
2348 .capabilities = CODEC_CAP_DR1,