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, ret;
249 int h_count[MAX_COMPONENTS] = { 0 };
250 int v_count[MAX_COMPONENTS] = { 0 };
253 s->upscale_h = s->upscale_v = 0;
255 /* XXX: verify len field validity */
256 len = get_bits(&s->gb, 16);
257 s->avctx->bits_per_raw_sample =
258 bits = get_bits(&s->gb, 8);
260 if (bits > 16 || bits < 1) {
261 av_log(s->avctx, AV_LOG_ERROR, "bits %d is invalid\n", bits);
262 return AVERROR_INVALIDDATA;
267 if (bits == 9 && !s->pegasus_rct)
268 s->rct = 1; // FIXME ugly
270 if(s->lossless && s->avctx->lowres){
271 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
275 height = get_bits(&s->gb, 16);
276 width = get_bits(&s->gb, 16);
278 if (s->avctx->codec_id == AV_CODEC_ID_AMV && (height&15))
279 avpriv_request_sample(s->avctx, "non mod 16 height AMV\n");
281 // HACK for odd_height.mov
282 if (s->interlaced && s->width == width && s->height == height + 1)
285 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
286 if (av_image_check_size(width, height, 0, s->avctx))
287 return AVERROR_INVALIDDATA;
289 nb_components = get_bits(&s->gb, 8);
290 if (nb_components <= 0 ||
291 nb_components > MAX_COMPONENTS)
293 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
294 if (nb_components != s->nb_components) {
295 av_log(s->avctx, AV_LOG_ERROR,
296 "nb_components changing in interlaced picture\n");
297 return AVERROR_INVALIDDATA;
300 if (s->ls && !(bits <= 8 || nb_components == 1)) {
301 avpriv_report_missing_feature(s->avctx,
302 "JPEG-LS that is not <= 8 "
303 "bits/component or 16-bit gray");
304 return AVERROR_PATCHWELCOME;
306 s->nb_components = nb_components;
309 for (i = 0; i < nb_components; i++) {
311 s->component_id[i] = get_bits(&s->gb, 8) - 1;
312 h_count[i] = get_bits(&s->gb, 4);
313 v_count[i] = get_bits(&s->gb, 4);
314 /* compute hmax and vmax (only used in interleaved case) */
315 if (h_count[i] > s->h_max)
316 s->h_max = h_count[i];
317 if (v_count[i] > s->v_max)
318 s->v_max = v_count[i];
319 s->quant_index[i] = get_bits(&s->gb, 8);
320 if (s->quant_index[i] >= 4) {
321 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
322 return AVERROR_INVALIDDATA;
324 if (!h_count[i] || !v_count[i]) {
325 av_log(s->avctx, AV_LOG_ERROR,
326 "Invalid sampling factor in component %d %d:%d\n",
327 i, h_count[i], v_count[i]);
328 return AVERROR_INVALIDDATA;
331 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
332 i, h_count[i], v_count[i],
333 s->component_id[i], s->quant_index[i]);
336 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
337 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
338 return AVERROR_PATCHWELCOME;
342 /* if different size, realloc/alloc picture */
343 if (width != s->width || height != s->height || bits != s->bits ||
344 memcmp(s->h_count, h_count, sizeof(h_count)) ||
345 memcmp(s->v_count, v_count, sizeof(v_count))) {
350 memcpy(s->h_count, h_count, sizeof(h_count));
351 memcpy(s->v_count, v_count, sizeof(v_count));
355 /* test interlaced mode */
356 if (s->first_picture &&
357 s->org_height != 0 &&
358 s->height < ((s->org_height * 3) / 4)) {
360 s->bottom_field = s->interlace_polarity;
361 s->picture_ptr->interlaced_frame = 1;
362 s->picture_ptr->top_field_first = !s->interlace_polarity;
366 ret = ff_set_dimensions(s->avctx, width, height);
370 s->first_picture = 0;
373 if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
374 if (s->progressive) {
375 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
376 return AVERROR_INVALIDDATA;
379 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
381 else if (!s->lossless)
383 /* XXX: not complete test ! */
384 pix_fmt_id = ((unsigned)s->h_count[0] << 28) | (s->v_count[0] << 24) |
385 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
386 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
387 (s->h_count[3] << 4) | s->v_count[3];
388 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
389 /* NOTE we do not allocate pictures large enough for the possible
390 * padding of h/v_count being 4 */
391 if (!(pix_fmt_id & 0xD0D0D0D0))
392 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
393 if (!(pix_fmt_id & 0x0D0D0D0D))
394 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
396 for (i = 0; i < 8; i++) {
397 int j = 6 + (i&1) - (i&6);
398 int is = (pix_fmt_id >> (4*i)) & 0xF;
399 int js = (pix_fmt_id >> (4*j)) & 0xF;
401 if (is == 1 && js != 2 && (i < 2 || i > 5))
402 js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
403 if (is == 1 && js != 2 && (i < 2 || i > 5))
404 js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
406 if (is == 1 && js == 2) {
407 if (i & 1) s->upscale_h |= 1 << (j/2);
408 else s->upscale_v |= 1 << (j/2);
412 switch (pix_fmt_id) {
415 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
417 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
418 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
420 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
421 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
422 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
425 av_assert0(s->nb_components == 3);
429 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
431 if (s->adobe_transform == 0 && s->bits <= 8) {
432 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
434 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
435 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
438 av_assert0(s->nb_components == 4);
442 if (s->adobe_transform == 0 && s->bits <= 8) {
443 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
446 } else if (s->adobe_transform == 2 && s->bits <= 8) {
447 s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
450 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
452 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
453 else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
454 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
456 av_assert0(s->nb_components == 4);
462 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
465 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
470 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
473 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
485 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
487 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
494 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
495 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
500 if (pix_fmt_id == 0x14111100)
502 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
505 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
509 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
510 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
515 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
516 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
517 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
522 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
525 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
530 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
531 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
532 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
533 if (pix_fmt_id == 0x42111100) {
537 } else if (pix_fmt_id == 0x24111100) {
544 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
547 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
551 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x bits:%d\n", pix_fmt_id, s->bits);
552 s->upscale_h = s->upscale_v = 0;
553 return AVERROR_PATCHWELCOME;
555 if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
556 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
557 return AVERROR_PATCHWELCOME;
560 s->upscale_h = s->upscale_v = 0;
561 if (s->nb_components > 1)
562 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
563 else if (s->palette_index && s->bits <= 8)
564 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
565 else if (s->bits <= 8)
566 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
568 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
571 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
573 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
577 av_frame_unref(s->picture_ptr);
578 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
580 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
581 s->picture_ptr->key_frame = 1;
584 for (i = 0; i < 4; i++)
585 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
587 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
588 s->width, s->height, s->linesize[0], s->linesize[1],
589 s->interlaced, s->avctx->height);
591 if (len != (8 + (3 * nb_components)))
592 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
595 if (s->rgb && !s->lossless && !s->ls) {
596 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
597 return AVERROR_PATCHWELCOME;
600 /* totally blank picture as progressive JPEG will only add details to it */
601 if (s->progressive) {
602 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
603 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
604 for (i = 0; i < s->nb_components; i++) {
605 int size = bw * bh * s->h_count[i] * s->v_count[i];
606 av_freep(&s->blocks[i]);
607 av_freep(&s->last_nnz[i]);
608 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
609 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
610 if (!s->blocks[i] || !s->last_nnz[i])
611 return AVERROR(ENOMEM);
612 s->block_stride[i] = bw * s->h_count[i];
614 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
619 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
622 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
623 if (code < 0 || code > 16) {
624 av_log(s->avctx, AV_LOG_WARNING,
625 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
626 0, dc_index, &s->vlcs[0][dc_index]);
631 return get_xbits(&s->gb, code);
636 /* decode block and dequantize */
637 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
638 int dc_index, int ac_index, int16_t *quant_matrix)
640 int code, i, j, level, val;
643 val = mjpeg_decode_dc(s, dc_index);
644 if (val == 0xfffff) {
645 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
646 return AVERROR_INVALIDDATA;
648 val = val * quant_matrix[0] + s->last_dc[component];
649 s->last_dc[component] = val;
653 {OPEN_READER(re, &s->gb);
655 UPDATE_CACHE(re, &s->gb);
656 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
658 i += ((unsigned)code) >> 4;
661 if (code > MIN_CACHE_BITS - 16)
662 UPDATE_CACHE(re, &s->gb);
665 int cache = GET_CACHE(re, &s->gb);
666 int sign = (~cache) >> 31;
667 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
670 LAST_SKIP_BITS(re, &s->gb, code);
673 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
674 return AVERROR_INVALIDDATA;
676 j = s->scantable.permutated[i];
677 block[j] = level * quant_matrix[j];
680 CLOSE_READER(re, &s->gb);}
685 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
686 int component, int dc_index,
687 int16_t *quant_matrix, int Al)
690 s->bdsp.clear_block(block);
691 val = mjpeg_decode_dc(s, dc_index);
692 if (val == 0xfffff) {
693 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
694 return AVERROR_INVALIDDATA;
696 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
697 s->last_dc[component] = val;
702 /* decode block and dequantize - progressive JPEG version */
703 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
704 uint8_t *last_nnz, int ac_index,
705 int16_t *quant_matrix,
706 int ss, int se, int Al, int *EOBRUN)
708 int code, i, j, level, val, run;
716 OPEN_READER(re, &s->gb);
717 for (i = ss; ; i++) {
718 UPDATE_CACHE(re, &s->gb);
719 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
721 run = ((unsigned) code) >> 4;
725 if (code > MIN_CACHE_BITS - 16)
726 UPDATE_CACHE(re, &s->gb);
729 int cache = GET_CACHE(re, &s->gb);
730 int sign = (~cache) >> 31;
731 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
734 LAST_SKIP_BITS(re, &s->gb, code);
738 j = s->scantable.permutated[se];
739 block[j] = level * quant_matrix[j] << Al;
742 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
743 return AVERROR_INVALIDDATA;
745 j = s->scantable.permutated[i];
746 block[j] = level * quant_matrix[j] << Al;
748 if (run == 0xF) {// ZRL - skip 15 coefficients
751 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
752 return AVERROR_INVALIDDATA;
757 UPDATE_CACHE(re, &s->gb);
758 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
759 LAST_SKIP_BITS(re, &s->gb, run);
766 CLOSE_READER(re, &s->gb);
775 #define REFINE_BIT(j) { \
776 UPDATE_CACHE(re, &s->gb); \
777 sign = block[j] >> 15; \
778 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
779 ((quant_matrix[j] ^ sign) - sign) << Al; \
780 LAST_SKIP_BITS(re, &s->gb, 1); \
788 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
793 j = s->scantable.permutated[i]; \
796 else if (run-- == 0) \
800 /* decode block and dequantize - progressive JPEG refinement pass */
801 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
803 int ac_index, int16_t *quant_matrix,
804 int ss, int se, int Al, int *EOBRUN)
806 int code, i = ss, j, sign, val, run;
807 int last = FFMIN(se, *last_nnz);
809 OPEN_READER(re, &s->gb);
814 UPDATE_CACHE(re, &s->gb);
815 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
818 run = ((unsigned) code) >> 4;
819 UPDATE_CACHE(re, &s->gb);
820 val = SHOW_UBITS(re, &s->gb, 1);
821 LAST_SKIP_BITS(re, &s->gb, 1);
823 j = s->scantable.permutated[i];
825 block[j] = ((quant_matrix[j]^val) - val) << Al;
829 CLOSE_READER(re, &s->gb);
833 run = ((unsigned) code) >> 4;
840 UPDATE_CACHE(re, &s->gb);
841 run += SHOW_UBITS(re, &s->gb, val);
842 LAST_SKIP_BITS(re, &s->gb, val);
854 for (; i <= last; i++) {
855 j = s->scantable.permutated[i];
859 CLOSE_READER(re, &s->gb);
866 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
871 if (s->restart_interval) {
873 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
874 align_get_bits(&s->gb);
875 for (i = 0; i < nb_components; i++) /* reset dc */
876 s->last_dc[i] = (4 << s->bits);
879 i = 8 + ((-get_bits_count(&s->gb)) & 7);
881 if (s->restart_count == 0) {
882 if( show_bits(&s->gb, i) == (1 << i) - 1
883 || show_bits(&s->gb, i) == 0xFF) {
884 int pos = get_bits_count(&s->gb);
885 align_get_bits(&s->gb);
886 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
887 skip_bits(&s->gb, 8);
888 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
889 for (i = 0; i < nb_components; i++) /* reset dc */
890 s->last_dc[i] = (4 << s->bits);
893 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
900 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
903 uint16_t (*buffer)[4];
904 int left[4], top[4], topleft[4];
905 const int linesize = s->linesize[0];
906 const int mask = ((1 << s->bits) - 1) << point_transform;
910 if (s->nb_components != 3 && s->nb_components != 4)
911 return AVERROR_INVALIDDATA;
912 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
913 return AVERROR_INVALIDDATA;
916 s->restart_count = s->restart_interval;
918 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
919 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
920 buffer = s->ljpeg_buffer;
922 for (i = 0; i < 4; i++)
923 buffer[0][i] = 1 << (s->bits - 1);
925 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
926 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
928 if (s->interlaced && s->bottom_field)
929 ptr += linesize >> 1;
931 for (i = 0; i < 4; i++)
932 top[i] = left[i] = topleft[i] = buffer[0][i];
934 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
935 int modified_predictor = predictor;
937 if (s->restart_interval && !s->restart_count){
938 s->restart_count = s->restart_interval;
942 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
944 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
945 modified_predictor = 1;
947 for (i=0;i<nb_components;i++) {
951 top[i] = buffer[mb_x][i];
953 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
955 dc = mjpeg_decode_dc(s, s->dc_index[i]);
959 left[i] = buffer[mb_x][i] =
960 mask & (pred + (dc << point_transform));
963 if (s->restart_interval && !--s->restart_count) {
964 align_get_bits(&s->gb);
965 skip_bits(&s->gb, 16); /* skip RSTn */
968 if (s->nb_components == 4) {
969 for(i=0; i<nb_components; i++) {
970 int c= s->comp_index[i];
972 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
973 ptr[4*mb_x+3-c] = buffer[mb_x][i];
975 } else if(s->bits == 9) {
976 return AVERROR_PATCHWELCOME;
978 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
979 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
984 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
985 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
986 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
987 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
989 } else if (s->pegasus_rct) {
990 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
991 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
992 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
993 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
996 for(i=0; i<nb_components; i++) {
997 int c= s->comp_index[i];
999 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1000 ptr[3*mb_x+2-c] = buffer[mb_x][i];
1002 } else if(s->bits == 9) {
1003 return AVERROR_PATCHWELCOME;
1005 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1006 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
1015 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1016 int point_transform, int nb_components)
1018 int i, mb_x, mb_y, mask;
1019 int bits= (s->bits+7)&~7;
1020 int resync_mb_y = 0;
1021 int resync_mb_x = 0;
1023 point_transform += bits - s->bits;
1024 mask = ((1 << s->bits) - 1) << point_transform;
1026 av_assert0(nb_components>=1 && nb_components<=4);
1028 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1029 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1030 if (s->restart_interval && !s->restart_count){
1031 s->restart_count = s->restart_interval;
1036 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1037 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1038 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1039 for (i = 0; i < nb_components; i++) {
1042 int n, h, v, x, y, c, j, linesize;
1043 n = s->nb_blocks[i];
1044 c = s->comp_index[i];
1049 linesize= s->linesize[c];
1051 if(bits>8) linesize /= 2;
1053 for(j=0; j<n; j++) {
1056 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1060 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1062 if(x==0 && leftcol){
1063 pred= 1 << (bits - 1);
1068 if(x==0 && leftcol){
1069 pred= ptr[-linesize];
1071 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1075 if (s->interlaced && s->bottom_field)
1076 ptr += linesize >> 1;
1078 *ptr= pred + (dc << point_transform);
1080 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1082 if(x==0 && leftcol){
1083 pred= 1 << (bits - 1);
1088 if(x==0 && leftcol){
1089 pred= ptr16[-linesize];
1091 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1095 if (s->interlaced && s->bottom_field)
1096 ptr16 += linesize >> 1;
1098 *ptr16= pred + (dc << point_transform);
1107 for (i = 0; i < nb_components; i++) {
1110 int n, h, v, x, y, c, j, linesize, dc;
1111 n = s->nb_blocks[i];
1112 c = s->comp_index[i];
1117 linesize = s->linesize[c];
1119 if(bits>8) linesize /= 2;
1121 for (j = 0; j < n; j++) {
1124 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1128 ptr = s->picture_ptr->data[c] +
1129 (linesize * (v * mb_y + y)) +
1130 (h * mb_x + x); //FIXME optimize this crap
1131 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1134 *ptr = pred + (dc << point_transform);
1136 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1137 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1140 *ptr16= pred + (dc << point_transform);
1150 if (s->restart_interval && !--s->restart_count) {
1151 align_get_bits(&s->gb);
1152 skip_bits(&s->gb, 16); /* skip RSTn */
1159 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1160 uint8_t *dst, const uint8_t *src,
1161 int linesize, int lowres)
1164 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1166 case 1: copy_block4(dst, src, linesize, linesize, 4);
1168 case 2: copy_block2(dst, src, linesize, linesize, 2);
1170 case 3: *dst = *src;
1175 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1177 int block_x, block_y;
1178 int size = 8 >> s->avctx->lowres;
1180 for (block_y=0; block_y<size; block_y++)
1181 for (block_x=0; block_x<size; block_x++)
1182 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1184 for (block_y=0; block_y<size; block_y++)
1185 for (block_x=0; block_x<size; block_x++)
1186 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1190 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1191 int Al, const uint8_t *mb_bitmask,
1192 int mb_bitmask_size,
1193 const AVFrame *reference)
1196 uint8_t *data[MAX_COMPONENTS];
1197 const uint8_t *reference_data[MAX_COMPONENTS];
1198 int linesize[MAX_COMPONENTS];
1199 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1200 int bytes_per_pixel = 1 + (s->bits > 8);
1203 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1204 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1205 return AVERROR_INVALIDDATA;
1207 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1210 s->restart_count = 0;
1212 for (i = 0; i < nb_components; i++) {
1213 int c = s->comp_index[i];
1214 data[c] = s->picture_ptr->data[c];
1215 reference_data[c] = reference ? reference->data[c] : NULL;
1216 linesize[c] = s->linesize[c];
1217 s->coefs_finished[c] |= 1;
1220 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1221 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1222 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1224 if (s->restart_interval && !s->restart_count)
1225 s->restart_count = s->restart_interval;
1227 if (get_bits_left(&s->gb) < 0) {
1228 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1229 -get_bits_left(&s->gb));
1230 return AVERROR_INVALIDDATA;
1232 for (i = 0; i < nb_components; i++) {
1234 int n, h, v, x, y, c, j;
1236 n = s->nb_blocks[i];
1237 c = s->comp_index[i];
1242 for (j = 0; j < n; j++) {
1243 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1244 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1246 if (s->interlaced && s->bottom_field)
1247 block_offset += linesize[c] >> 1;
1248 ptr = data[c] + block_offset;
1249 if (!s->progressive) {
1251 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1252 linesize[c], s->avctx->lowres);
1255 s->bdsp.clear_block(s->block);
1256 if (decode_block(s, s->block, i,
1257 s->dc_index[i], s->ac_index[i],
1258 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1259 av_log(s->avctx, AV_LOG_ERROR,
1260 "error y=%d x=%d\n", mb_y, mb_x);
1261 return AVERROR_INVALIDDATA;
1263 s->idsp.idct_put(ptr, linesize[c], s->block);
1265 shift_output(s, ptr, linesize[c]);
1268 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1270 int16_t *block = s->blocks[c][block_idx];
1272 block[0] += get_bits1(&s->gb) *
1273 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1274 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1275 s->quant_matrixes[s->quant_sindex[i]],
1277 av_log(s->avctx, AV_LOG_ERROR,
1278 "error y=%d x=%d\n", mb_y, mb_x);
1279 return AVERROR_INVALIDDATA;
1282 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1283 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1284 mb_x, mb_y, x, y, c, s->bottom_field,
1285 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1293 handle_rstn(s, nb_components);
1299 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1300 int se, int Ah, int Al)
1304 int c = s->comp_index[0];
1305 uint8_t *data = s->picture_ptr->data[c];
1306 int linesize = s->linesize[c];
1308 int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1309 int bytes_per_pixel = 1 + (s->bits > 8);
1311 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1312 if (se < ss || se > 63) {
1313 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1314 return AVERROR_INVALIDDATA;
1318 // s->coefs_finished is a bitmask for coefficients coded
1319 // ss and se are parameters telling start and end coefficients
1320 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1321 last_scan = !~s->coefs_finished[c];
1324 if (s->interlaced && s->bottom_field)
1325 data += linesize >> 1;
1327 s->restart_count = 0;
1329 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1330 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1331 int block_idx = mb_y * s->block_stride[c];
1332 int16_t (*block)[64] = &s->blocks[c][block_idx];
1333 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1334 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1336 if (s->restart_interval && !s->restart_count)
1337 s->restart_count = s->restart_interval;
1340 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1341 quant_matrix, ss, se, Al, &EOBRUN);
1343 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1344 quant_matrix, ss, se, Al, &EOBRUN);
1346 av_log(s->avctx, AV_LOG_ERROR,
1347 "error y=%d x=%d\n", mb_y, mb_x);
1348 return AVERROR_INVALIDDATA;
1352 s->idsp.idct_put(ptr, linesize, *block);
1354 shift_output(s, ptr, linesize);
1355 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1357 if (handle_rstn(s, 0))
1364 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1365 int mb_bitmask_size, const AVFrame *reference)
1367 int len, nb_components, i, h, v, predictor, point_transform;
1369 const int block_size = s->lossless ? 1 : 8;
1370 int ilv, prev_shift;
1372 if (!s->got_picture) {
1373 av_log(s->avctx, AV_LOG_WARNING,
1374 "Can not process SOS before SOF, skipping\n");
1378 av_assert0(s->picture_ptr->data[0]);
1379 /* XXX: verify len field validity */
1380 len = get_bits(&s->gb, 16);
1381 nb_components = get_bits(&s->gb, 8);
1382 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1383 av_log(s->avctx, AV_LOG_ERROR,
1384 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1385 return AVERROR_PATCHWELCOME;
1387 if (len != 6 + 2 * nb_components) {
1388 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1389 return AVERROR_INVALIDDATA;
1391 for (i = 0; i < nb_components; i++) {
1392 id = get_bits(&s->gb, 8) - 1;
1393 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1394 /* find component index */
1395 for (index = 0; index < s->nb_components; index++)
1396 if (id == s->component_id[index])
1398 if (index == s->nb_components) {
1399 av_log(s->avctx, AV_LOG_ERROR,
1400 "decode_sos: index(%d) out of components\n", index);
1401 return AVERROR_INVALIDDATA;
1403 /* Metasoft MJPEG codec has Cb and Cr swapped */
1404 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1405 && nb_components == 3 && s->nb_components == 3 && i)
1408 s->quant_sindex[i] = s->quant_index[index];
1409 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1410 s->h_scount[i] = s->h_count[index];
1411 s->v_scount[i] = s->v_count[index];
1413 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1415 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1416 index = (index+2)%3;
1418 s->comp_index[i] = index;
1420 s->dc_index[i] = get_bits(&s->gb, 4);
1421 s->ac_index[i] = get_bits(&s->gb, 4);
1423 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1424 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1426 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))
1430 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1431 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1432 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1433 prev_shift = get_bits(&s->gb, 4); /* Ah */
1434 point_transform = get_bits(&s->gb, 4); /* Al */
1436 prev_shift = point_transform = 0;
1438 if (nb_components > 1) {
1439 /* interleaved stream */
1440 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1441 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1442 } else if (!s->ls) { /* skip this for JPEG-LS */
1443 h = s->h_max / s->h_scount[0];
1444 v = s->v_max / s->v_scount[0];
1445 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1446 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1447 s->nb_blocks[0] = 1;
1452 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1453 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1454 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1455 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1456 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1459 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1460 for (i = s->mjpb_skiptosod; i > 0; i--)
1461 skip_bits(&s->gb, 8);
1464 for (i = 0; i < nb_components; i++)
1465 s->last_dc[i] = (4 << s->bits);
1468 av_assert0(s->picture_ptr == s->picture);
1469 if (CONFIG_JPEGLS_DECODER && s->ls) {
1471 // reset_ls_coding_parameters(s, 0);
1473 if ((ret = ff_jpegls_decode_picture(s, predictor,
1474 point_transform, ilv)) < 0)
1478 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1481 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1483 nb_components)) < 0)
1488 if (s->progressive && predictor) {
1489 av_assert0(s->picture_ptr == s->picture);
1490 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1492 point_transform)) < 0)
1495 if ((ret = mjpeg_decode_scan(s, nb_components,
1496 prev_shift, point_transform,
1497 mb_bitmask, mb_bitmask_size, reference)) < 0)
1502 if (s->interlaced &&
1503 get_bits_left(&s->gb) > 32 &&
1504 show_bits(&s->gb, 8) == 0xFF) {
1505 GetBitContext bak = s->gb;
1506 align_get_bits(&bak);
1507 if (show_bits(&bak, 16) == 0xFFD1) {
1508 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1510 skip_bits(&s->gb, 16);
1511 s->bottom_field ^= 1;
1520 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1521 return AVERROR_INVALIDDATA;
1524 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1526 if (get_bits(&s->gb, 16) != 4)
1527 return AVERROR_INVALIDDATA;
1528 s->restart_interval = get_bits(&s->gb, 16);
1529 s->restart_count = 0;
1530 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1531 s->restart_interval);
1536 static int mjpeg_decode_app(MJpegDecodeContext *s)
1540 len = get_bits(&s->gb, 16);
1542 return AVERROR_INVALIDDATA;
1543 if (8 * len > get_bits_left(&s->gb))
1544 return AVERROR_INVALIDDATA;
1546 id = get_bits_long(&s->gb, 32);
1549 if (s->avctx->debug & FF_DEBUG_STARTCODE) {
1551 av_get_codec_tag_string(id_str, sizeof(id_str), av_bswap32(id));
1552 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n", id_str, id, len);
1555 /* Buggy AVID, it puts EOI only at every 10th frame. */
1556 /* Also, this fourcc is used by non-avid files too, it holds some
1557 information, but it's always present in AVID-created files. */
1558 if (id == AV_RB32("AVI1")) {
1564 4bytes field_size_less_padding
1567 i = get_bits(&s->gb, 8); len--;
1568 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1570 skip_bits(&s->gb, 8);
1571 skip_bits(&s->gb, 32);
1572 skip_bits(&s->gb, 32);
1580 if (id == AV_RB32("JFIF")) {
1581 int t_w, t_h, v1, v2;
1582 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1583 v1 = get_bits(&s->gb, 8);
1584 v2 = get_bits(&s->gb, 8);
1585 skip_bits(&s->gb, 8);
1587 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1588 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1589 ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
1591 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1592 av_log(s->avctx, AV_LOG_INFO,
1593 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1595 s->avctx->sample_aspect_ratio.num,
1596 s->avctx->sample_aspect_ratio.den);
1598 t_w = get_bits(&s->gb, 8);
1599 t_h = get_bits(&s->gb, 8);
1601 /* skip thumbnail */
1602 if (len -10 - (t_w * t_h * 3) > 0)
1603 len -= t_w * t_h * 3;
1609 if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1610 skip_bits(&s->gb, 16); /* version */
1611 skip_bits(&s->gb, 16); /* flags0 */
1612 skip_bits(&s->gb, 16); /* flags1 */
1613 s->adobe_transform = get_bits(&s->gb, 8);
1614 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1615 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1620 if (id == AV_RB32("LJIF")) {
1622 int pegasus_rct = s->pegasus_rct;
1623 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1624 av_log(s->avctx, AV_LOG_INFO,
1625 "Pegasus lossless jpeg header found\n");
1626 skip_bits(&s->gb, 16); /* version ? */
1627 skip_bits(&s->gb, 16); /* unknown always 0? */
1628 skip_bits(&s->gb, 16); /* unknown always 0? */
1629 skip_bits(&s->gb, 16); /* unknown always 0? */
1630 switch (i=get_bits(&s->gb, 8)) {
1640 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1645 if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
1646 av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
1651 s->pegasus_rct = pegasus_rct;
1655 if (id == AV_RL32("colr") && len > 0) {
1656 s->colr = get_bits(&s->gb, 8);
1657 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1658 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1662 if (id == AV_RL32("xfrm") && len > 0) {
1663 s->xfrm = get_bits(&s->gb, 8);
1664 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1665 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1670 /* JPS extension by VRex */
1671 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1672 int flags, layout, type;
1673 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1674 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1676 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1677 skip_bits(&s->gb, 16); len -= 2; /* block length */
1678 skip_bits(&s->gb, 8); /* reserved */
1679 flags = get_bits(&s->gb, 8);
1680 layout = get_bits(&s->gb, 8);
1681 type = get_bits(&s->gb, 8);
1684 s->stereo3d = av_stereo3d_alloc();
1689 s->stereo3d->type = AV_STEREO3D_2D;
1690 } else if (type == 1) {
1693 s->stereo3d->type = AV_STEREO3D_LINES;
1696 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1699 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1702 if (!(flags & 0x04)) {
1703 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1710 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1711 GetByteContext gbytes;
1712 int ret, le, ifd_offset, bytes_read;
1713 const uint8_t *aligned;
1715 skip_bits(&s->gb, 16); // skip padding
1718 // init byte wise reading
1719 aligned = align_get_bits(&s->gb);
1720 bytestream2_init(&gbytes, aligned, len);
1723 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1725 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1727 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1729 // read 0th IFD and store the metadata
1730 // (return values > 0 indicate the presence of subimage metadata)
1731 ret = avpriv_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1733 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1737 bytes_read = bytestream2_tell(&gbytes);
1738 skip_bits(&s->gb, bytes_read << 3);
1745 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1746 id = get_bits_long(&s->gb, 32);
1749 if (id == AV_RB32("mjpg")) {
1751 skip_bits(&s->gb, 32); /* field size */
1752 skip_bits(&s->gb, 32); /* pad field size */
1753 skip_bits(&s->gb, 32); /* next off */
1754 skip_bits(&s->gb, 32); /* quant off */
1755 skip_bits(&s->gb, 32); /* huff off */
1756 skip_bits(&s->gb, 32); /* image off */
1757 skip_bits(&s->gb, 32); /* scan off */
1758 skip_bits(&s->gb, 32); /* data off */
1760 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1761 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1766 /* slow but needed for extreme adobe jpegs */
1768 av_log(s->avctx, AV_LOG_ERROR,
1769 "mjpeg: error, decode_app parser read over the end\n");
1771 skip_bits(&s->gb, 8);
1776 static int mjpeg_decode_com(MJpegDecodeContext *s)
1778 int len = get_bits(&s->gb, 16);
1779 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1780 char *cbuf = av_malloc(len - 1);
1783 for (i = 0; i < len - 2; i++)
1784 cbuf[i] = get_bits(&s->gb, 8);
1785 if (i > 0 && cbuf[i - 1] == '\n')
1790 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1791 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1793 /* buggy avid, it puts EOI only at every 10th frame */
1794 if (!strncmp(cbuf, "AVID", 4)) {
1795 parse_avid(s, cbuf, len);
1796 } else if (!strcmp(cbuf, "CS=ITU601"))
1798 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
1799 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1809 /* return the 8 bit start code value and update the search
1810 state. Return -1 if no start code found */
1811 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1813 const uint8_t *buf_ptr;
1818 buf_ptr = *pbuf_ptr;
1819 while (buf_end - buf_ptr > 1) {
1822 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1831 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1832 *pbuf_ptr = buf_ptr;
1836 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1837 const uint8_t **buf_ptr, const uint8_t *buf_end,
1838 const uint8_t **unescaped_buf_ptr,
1839 int *unescaped_buf_size)
1842 start_code = find_marker(buf_ptr, buf_end);
1844 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1846 return AVERROR(ENOMEM);
1848 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1849 if (start_code == SOS && !s->ls) {
1850 const uint8_t *src = *buf_ptr;
1851 uint8_t *dst = s->buffer;
1853 while (src < buf_end) {
1854 uint8_t x = *(src++);
1857 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1859 while (src < buf_end && x == 0xff)
1862 if (x >= 0xd0 && x <= 0xd7)
1869 *unescaped_buf_ptr = s->buffer;
1870 *unescaped_buf_size = dst - s->buffer;
1871 memset(s->buffer + *unescaped_buf_size, 0,
1872 FF_INPUT_BUFFER_PADDING_SIZE);
1874 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
1875 (buf_end - *buf_ptr) - (dst - s->buffer));
1876 } else if (start_code == SOS && s->ls) {
1877 const uint8_t *src = *buf_ptr;
1878 uint8_t *dst = s->buffer;
1884 while (src + t < buf_end) {
1885 uint8_t x = src[t++];
1887 while ((src + t < buf_end) && x == 0xff)
1896 init_put_bits(&pb, dst, t);
1898 /* unescape bitstream */
1900 uint8_t x = src[b++];
1901 put_bits(&pb, 8, x);
1904 put_bits(&pb, 7, x);
1908 flush_put_bits(&pb);
1910 *unescaped_buf_ptr = dst;
1911 *unescaped_buf_size = (bit_count + 7) >> 3;
1912 memset(s->buffer + *unescaped_buf_size, 0,
1913 FF_INPUT_BUFFER_PADDING_SIZE);
1915 *unescaped_buf_ptr = *buf_ptr;
1916 *unescaped_buf_size = buf_end - *buf_ptr;
1922 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1925 AVFrame *frame = data;
1926 const uint8_t *buf = avpkt->data;
1927 int buf_size = avpkt->size;
1928 MJpegDecodeContext *s = avctx->priv_data;
1929 const uint8_t *buf_end, *buf_ptr;
1930 const uint8_t *unescaped_buf_ptr;
1932 int unescaped_buf_size;
1938 av_dict_free(&s->exif_metadata);
1939 av_freep(&s->stereo3d);
1940 s->adobe_transform = -1;
1943 buf_end = buf + buf_size;
1944 while (buf_ptr < buf_end) {
1945 /* find start next marker */
1946 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1948 &unescaped_buf_size);
1950 if (start_code < 0) {
1952 } else if (unescaped_buf_size > INT_MAX / 8) {
1953 av_log(avctx, AV_LOG_ERROR,
1954 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1955 start_code, unescaped_buf_size, buf_size);
1956 return AVERROR_INVALIDDATA;
1958 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
1959 start_code, buf_end - buf_ptr);
1961 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
1964 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
1968 s->start_code = start_code;
1969 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1970 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1972 /* process markers */
1973 if (start_code >= 0xd0 && start_code <= 0xd7)
1974 av_log(avctx, AV_LOG_DEBUG,
1975 "restart marker: %d\n", start_code & 0x0f);
1977 else if (start_code >= APP0 && start_code <= APP15)
1978 mjpeg_decode_app(s);
1980 else if (start_code == COM)
1981 mjpeg_decode_com(s);
1985 if (!CONFIG_JPEGLS_DECODER &&
1986 (start_code == SOF48 || start_code == LSE)) {
1987 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
1988 return AVERROR(ENOSYS);
1991 switch (start_code) {
1993 s->restart_interval = 0;
1994 s->restart_count = 0;
1995 /* nothing to do on SOI */
1998 ff_mjpeg_decode_dqt(s);
2001 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
2002 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
2011 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2018 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2025 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2032 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2036 if (!CONFIG_JPEGLS_DECODER ||
2037 (ret = ff_jpegls_decode_lse(s)) < 0)
2043 if (!s->got_picture) {
2044 av_log(avctx, AV_LOG_WARNING,
2045 "Found EOI before any SOF, ignoring\n");
2048 if (s->interlaced) {
2049 s->bottom_field ^= 1;
2050 /* if not bottom field, do not output image yet */
2051 if (s->bottom_field == !s->interlace_polarity)
2054 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2060 int qp = FFMAX3(s->qscale[0],
2063 int qpw = (s->width + 15) / 16;
2064 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2066 memset(qp_table_buf->data, qp, qpw);
2067 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2070 if(avctx->debug & FF_DEBUG_QP)
2071 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2077 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2078 (avctx->err_recognition & AV_EF_EXPLODE))
2082 mjpeg_decode_dri(s);
2094 av_log(avctx, AV_LOG_ERROR,
2095 "mjpeg: unsupported coding type (%x)\n", start_code);
2099 /* eof process start code */
2100 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2101 av_log(avctx, AV_LOG_DEBUG,
2102 "marker parser used %d bytes (%d bits)\n",
2103 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2105 if (s->got_picture && s->cur_scan) {
2106 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2109 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2110 return AVERROR_INVALIDDATA;
2116 is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step_minus1;
2120 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2121 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2122 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2123 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2124 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2125 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2126 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2127 avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2128 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2129 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2130 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2131 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2133 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2134 for (p = 0; p<4; p++) {
2135 uint8_t *line = s->picture_ptr->data[p];
2138 if (!(s->upscale_h & (1<<p)))
2141 w = FF_CEIL_RSHIFT(w, hshift);
2142 h = FF_CEIL_RSHIFT(h, vshift);
2144 if (s->upscale_v & (1<<p))
2147 for (i = 0; i < h; i++) {
2148 if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2149 else line[w - 1] = line[(w - 1) / 2];
2150 for (index = w - 2; index > 0; index--) {
2152 ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2154 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2156 line += s->linesize[p];
2162 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2163 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2164 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2165 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2166 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2167 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2168 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2169 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2170 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2171 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2172 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2173 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2174 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2176 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2177 for (p = 0; p < 4; p++) {
2181 if (!(s->upscale_v & (1<<p)))
2184 w = FF_CEIL_RSHIFT(w, hshift);
2185 h = FF_CEIL_RSHIFT(h, vshift);
2187 dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2188 for (i = h - 1; i; i--) {
2189 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2190 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2191 if (src1 == src2 || i == h - 1) {
2192 memcpy(dst, src1, w);
2194 for (index = 0; index < w; index++)
2195 dst[index] = (src1[index] + src2[index]) >> 1;
2197 dst -= s->linesize[p];
2203 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2204 for (index=0; index<4; index++) {
2205 uint8_t *dst = s->picture_ptr->data[index];
2206 int w = s->picture_ptr->width;
2207 int h = s->picture_ptr->height;
2208 if(index && index<3){
2209 w = FF_CEIL_RSHIFT(w, hshift);
2210 h = FF_CEIL_RSHIFT(h, vshift);
2213 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2214 for (i=0; i<h/2; i++) {
2216 FFSWAP(int, dst[j], dst2[j]);
2217 dst += s->picture_ptr->linesize[index];
2218 dst2 -= s->picture_ptr->linesize[index];
2223 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2224 int w = s->picture_ptr->width;
2225 int h = s->picture_ptr->height;
2226 for (i=0; i<h; i++) {
2229 for (index=0; index<4; index++) {
2230 dst[index] = s->picture_ptr->data[index]
2231 + s->picture_ptr->linesize[index]*i;
2233 for (j=0; j<w; j++) {
2235 int r = dst[0][j] * k;
2236 int g = dst[1][j] * k;
2237 int b = dst[2][j] * k;
2238 dst[0][j] = g*257 >> 16;
2239 dst[1][j] = b*257 >> 16;
2240 dst[2][j] = r*257 >> 16;
2245 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2246 int w = s->picture_ptr->width;
2247 int h = s->picture_ptr->height;
2248 for (i=0; i<h; i++) {
2251 for (index=0; index<4; index++) {
2252 dst[index] = s->picture_ptr->data[index]
2253 + s->picture_ptr->linesize[index]*i;
2255 for (j=0; j<w; j++) {
2257 int r = (255 - dst[0][j]) * k;
2258 int g = (128 - dst[1][j]) * k;
2259 int b = (128 - dst[2][j]) * k;
2260 dst[0][j] = r*257 >> 16;
2261 dst[1][j] = (g*257 >> 16) + 128;
2262 dst[2][j] = (b*257 >> 16) + 128;
2269 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2271 stereo->type = s->stereo3d->type;
2272 stereo->flags = s->stereo3d->flags;
2274 av_freep(&s->stereo3d);
2277 av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
2278 av_dict_free(&s->exif_metadata);
2280 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2282 // return buf_end - buf_ptr;
2283 return buf_ptr - buf;
2286 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2288 MJpegDecodeContext *s = avctx->priv_data;
2291 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2292 av_log(avctx, AV_LOG_INFO, "Single field\n");
2296 av_frame_free(&s->picture);
2297 s->picture_ptr = NULL;
2298 } else if (s->picture_ptr)
2299 av_frame_unref(s->picture_ptr);
2301 av_freep(&s->buffer);
2302 av_freep(&s->stereo3d);
2303 av_freep(&s->ljpeg_buffer);
2304 s->ljpeg_buffer_size = 0;
2306 for (i = 0; i < 3; i++) {
2307 for (j = 0; j < 4; j++)
2308 ff_free_vlc(&s->vlcs[i][j]);
2310 for (i = 0; i < MAX_COMPONENTS; i++) {
2311 av_freep(&s->blocks[i]);
2312 av_freep(&s->last_nnz[i]);
2314 av_dict_free(&s->exif_metadata);
2318 static void decode_flush(AVCodecContext *avctx)
2320 MJpegDecodeContext *s = avctx->priv_data;
2324 #if CONFIG_MJPEG_DECODER
2325 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2326 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2327 static const AVOption options[] = {
2328 { "extern_huff", "Use external huffman table.",
2329 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
2333 static const AVClass mjpegdec_class = {
2334 .class_name = "MJPEG decoder",
2335 .item_name = av_default_item_name,
2337 .version = LIBAVUTIL_VERSION_INT,
2340 AVCodec ff_mjpeg_decoder = {
2342 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2343 .type = AVMEDIA_TYPE_VIDEO,
2344 .id = AV_CODEC_ID_MJPEG,
2345 .priv_data_size = sizeof(MJpegDecodeContext),
2346 .init = ff_mjpeg_decode_init,
2347 .close = ff_mjpeg_decode_end,
2348 .decode = ff_mjpeg_decode_frame,
2349 .flush = decode_flush,
2350 .capabilities = CODEC_CAP_DR1,
2352 .priv_class = &mjpegdec_class,
2355 #if CONFIG_THP_DECODER
2356 AVCodec ff_thp_decoder = {
2358 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2359 .type = AVMEDIA_TYPE_VIDEO,
2360 .id = AV_CODEC_ID_THP,
2361 .priv_data_size = sizeof(MJpegDecodeContext),
2362 .init = ff_mjpeg_decode_init,
2363 .close = ff_mjpeg_decode_end,
2364 .decode = ff_mjpeg_decode_frame,
2365 .flush = decode_flush,
2366 .capabilities = CODEC_CAP_DR1,