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 memset(s->upscale_h, 0, sizeof(s->upscale_h));
254 memset(s->upscale_v, 0, sizeof(s->upscale_v));
256 /* XXX: verify len field validity */
257 len = get_bits(&s->gb, 16);
258 s->avctx->bits_per_raw_sample =
259 bits = get_bits(&s->gb, 8);
261 if (bits > 16 || bits < 1) {
262 av_log(s->avctx, AV_LOG_ERROR, "bits %d is invalid\n", bits);
263 return AVERROR_INVALIDDATA;
268 if (bits == 9 && !s->pegasus_rct)
269 s->rct = 1; // FIXME ugly
271 if(s->lossless && s->avctx->lowres){
272 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
276 height = get_bits(&s->gb, 16);
277 width = get_bits(&s->gb, 16);
279 if (s->avctx->codec_id == AV_CODEC_ID_AMV && (height&15))
280 avpriv_request_sample(s->avctx, "non mod 16 height AMV\n");
282 // HACK for odd_height.mov
283 if (s->interlaced && s->width == width && s->height == height + 1)
286 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
287 if (av_image_check_size(width, height, 0, s->avctx))
288 return AVERROR_INVALIDDATA;
290 nb_components = get_bits(&s->gb, 8);
291 if (nb_components <= 0 ||
292 nb_components > MAX_COMPONENTS)
294 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
295 if (nb_components != s->nb_components) {
296 av_log(s->avctx, AV_LOG_ERROR,
297 "nb_components changing in interlaced picture\n");
298 return AVERROR_INVALIDDATA;
301 if (s->ls && !(bits <= 8 || nb_components == 1)) {
302 avpriv_report_missing_feature(s->avctx,
303 "JPEG-LS that is not <= 8 "
304 "bits/component or 16-bit gray");
305 return AVERROR_PATCHWELCOME;
307 s->nb_components = nb_components;
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 || bits != s->bits ||
345 memcmp(s->h_count, h_count, sizeof(h_count)) ||
346 memcmp(s->v_count, v_count, sizeof(v_count))) {
351 memcpy(s->h_count, h_count, sizeof(h_count));
352 memcpy(s->v_count, v_count, sizeof(v_count));
356 /* test interlaced mode */
357 if (s->first_picture &&
358 s->org_height != 0 &&
359 s->height < ((s->org_height * 3) / 4)) {
361 s->bottom_field = s->interlace_polarity;
362 s->picture_ptr->interlaced_frame = 1;
363 s->picture_ptr->top_field_first = !s->interlace_polarity;
367 ret = ff_set_dimensions(s->avctx, width, height);
371 s->first_picture = 0;
374 if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
375 if (s->progressive) {
376 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
377 return AVERROR_INVALIDDATA;
380 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
382 else if (!s->lossless)
384 /* XXX: not complete test ! */
385 pix_fmt_id = ((unsigned)s->h_count[0] << 28) | (s->v_count[0] << 24) |
386 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
387 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
388 (s->h_count[3] << 4) | s->v_count[3];
389 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
390 /* NOTE we do not allocate pictures large enough for the possible
391 * padding of h/v_count being 4 */
392 if (!(pix_fmt_id & 0xD0D0D0D0))
393 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
394 if (!(pix_fmt_id & 0x0D0D0D0D))
395 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
397 for (i = 0; i < 8; i++) {
398 int j = 6 + (i&1) - (i&6);
399 int is = (pix_fmt_id >> (4*i)) & 0xF;
400 int js = (pix_fmt_id >> (4*j)) & 0xF;
402 if (is == 1 && js != 2 && (i < 2 || i > 5))
403 js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
404 if (is == 1 && js != 2 && (i < 2 || i > 5))
405 js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
407 if (is == 1 && js == 2) {
408 if (i & 1) s->upscale_h[j/2] = 1;
409 else s->upscale_v[j/2] = 1;
413 switch (pix_fmt_id) {
416 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
418 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
419 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
421 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
422 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
423 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
426 av_assert0(s->nb_components == 3);
430 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
432 if (s->adobe_transform == 0 && s->bits <= 8) {
433 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
435 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
436 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
439 av_assert0(s->nb_components == 4);
443 if (s->adobe_transform == 0 && s->bits <= 8) {
444 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
445 s->upscale_v[1] = s->upscale_v[2] = 1;
446 s->upscale_h[1] = s->upscale_h[2] = 1;
447 } else if (s->adobe_transform == 2 && s->bits <= 8) {
448 s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
449 s->upscale_v[1] = s->upscale_v[2] = 1;
450 s->upscale_h[1] = s->upscale_h[2] = 1;
451 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
453 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
454 else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
455 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
457 av_assert0(s->nb_components == 4);
463 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
466 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
471 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
474 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
486 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
488 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
495 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
496 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
499 s->upscale_v[0] = s->upscale_v[1] = 1;
501 if (pix_fmt_id == 0x14111100)
502 s->upscale_v[1] = s->upscale_v[2] = 1;
503 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
506 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
510 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
511 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
514 s->upscale_h[0] = s->upscale_h[1] = 1;
516 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
517 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
518 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
524 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
525 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
526 s->upscale_h[1] = s->upscale_h[2] = 2;
530 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
533 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
538 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
539 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
540 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
541 if (pix_fmt_id == 0x42111100) {
544 s->upscale_h[1] = s->upscale_h[2] = 1;
545 } else if (pix_fmt_id == 0x24111100) {
548 s->upscale_v[1] = s->upscale_v[2] = 1;
552 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
555 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
559 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x bits:%d\n", pix_fmt_id, s->bits);
560 memset(s->upscale_h, 0, sizeof(s->upscale_h));
561 memset(s->upscale_v, 0, sizeof(s->upscale_v));
562 return AVERROR_PATCHWELCOME;
564 if ((AV_RB32(s->upscale_h) || AV_RB32(s->upscale_v)) && s->avctx->lowres) {
565 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
566 return AVERROR_PATCHWELCOME;
569 memset(s->upscale_h, 0, sizeof(s->upscale_h));
570 memset(s->upscale_v, 0, sizeof(s->upscale_v));
571 if (s->nb_components == 3) {
572 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
573 } else if (s->nb_components != 1) {
574 av_log(s->avctx, AV_LOG_ERROR, "Unsupported number of components %d\n", s->nb_components);
575 return AVERROR_PATCHWELCOME;
576 } else if (s->palette_index && s->bits <= 8)
577 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
578 else if (s->bits <= 8)
579 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
581 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
584 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
586 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
590 av_frame_unref(s->picture_ptr);
591 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
593 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
594 s->picture_ptr->key_frame = 1;
597 for (i = 0; i < 4; i++)
598 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
600 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
601 s->width, s->height, s->linesize[0], s->linesize[1],
602 s->interlaced, s->avctx->height);
604 if (len != (8 + (3 * nb_components)))
605 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
608 if (s->rgb && !s->lossless && !s->ls) {
609 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
610 return AVERROR_PATCHWELCOME;
613 /* totally blank picture as progressive JPEG will only add details to it */
614 if (s->progressive) {
615 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
616 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
617 for (i = 0; i < s->nb_components; i++) {
618 int size = bw * bh * s->h_count[i] * s->v_count[i];
619 av_freep(&s->blocks[i]);
620 av_freep(&s->last_nnz[i]);
621 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
622 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
623 if (!s->blocks[i] || !s->last_nnz[i])
624 return AVERROR(ENOMEM);
625 s->block_stride[i] = bw * s->h_count[i];
627 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
632 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
635 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
636 if (code < 0 || code > 16) {
637 av_log(s->avctx, AV_LOG_WARNING,
638 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
639 0, dc_index, &s->vlcs[0][dc_index]);
644 return get_xbits(&s->gb, code);
649 /* decode block and dequantize */
650 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
651 int dc_index, int ac_index, int16_t *quant_matrix)
653 int code, i, j, level, val;
656 val = mjpeg_decode_dc(s, dc_index);
657 if (val == 0xfffff) {
658 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
659 return AVERROR_INVALIDDATA;
661 val = val * quant_matrix[0] + s->last_dc[component];
662 s->last_dc[component] = val;
666 {OPEN_READER(re, &s->gb);
668 UPDATE_CACHE(re, &s->gb);
669 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
671 i += ((unsigned)code) >> 4;
674 if (code > MIN_CACHE_BITS - 16)
675 UPDATE_CACHE(re, &s->gb);
678 int cache = GET_CACHE(re, &s->gb);
679 int sign = (~cache) >> 31;
680 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
683 LAST_SKIP_BITS(re, &s->gb, code);
686 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
687 return AVERROR_INVALIDDATA;
689 j = s->scantable.permutated[i];
690 block[j] = level * quant_matrix[j];
693 CLOSE_READER(re, &s->gb);}
698 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
699 int component, int dc_index,
700 int16_t *quant_matrix, int Al)
703 s->bdsp.clear_block(block);
704 val = mjpeg_decode_dc(s, dc_index);
705 if (val == 0xfffff) {
706 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
707 return AVERROR_INVALIDDATA;
709 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
710 s->last_dc[component] = val;
715 /* decode block and dequantize - progressive JPEG version */
716 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
717 uint8_t *last_nnz, int ac_index,
718 int16_t *quant_matrix,
719 int ss, int se, int Al, int *EOBRUN)
721 int code, i, j, level, val, run;
729 OPEN_READER(re, &s->gb);
730 for (i = ss; ; i++) {
731 UPDATE_CACHE(re, &s->gb);
732 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
734 run = ((unsigned) code) >> 4;
738 if (code > MIN_CACHE_BITS - 16)
739 UPDATE_CACHE(re, &s->gb);
742 int cache = GET_CACHE(re, &s->gb);
743 int sign = (~cache) >> 31;
744 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
747 LAST_SKIP_BITS(re, &s->gb, code);
751 j = s->scantable.permutated[se];
752 block[j] = level * quant_matrix[j] << Al;
755 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
756 return AVERROR_INVALIDDATA;
758 j = s->scantable.permutated[i];
759 block[j] = level * quant_matrix[j] << Al;
761 if (run == 0xF) {// ZRL - skip 15 coefficients
764 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
765 return AVERROR_INVALIDDATA;
770 UPDATE_CACHE(re, &s->gb);
771 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
772 LAST_SKIP_BITS(re, &s->gb, run);
779 CLOSE_READER(re, &s->gb);
788 #define REFINE_BIT(j) { \
789 UPDATE_CACHE(re, &s->gb); \
790 sign = block[j] >> 15; \
791 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
792 ((quant_matrix[j] ^ sign) - sign) << Al; \
793 LAST_SKIP_BITS(re, &s->gb, 1); \
801 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
806 j = s->scantable.permutated[i]; \
809 else if (run-- == 0) \
813 /* decode block and dequantize - progressive JPEG refinement pass */
814 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
816 int ac_index, int16_t *quant_matrix,
817 int ss, int se, int Al, int *EOBRUN)
819 int code, i = ss, j, sign, val, run;
820 int last = FFMIN(se, *last_nnz);
822 OPEN_READER(re, &s->gb);
827 UPDATE_CACHE(re, &s->gb);
828 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
831 run = ((unsigned) code) >> 4;
832 UPDATE_CACHE(re, &s->gb);
833 val = SHOW_UBITS(re, &s->gb, 1);
834 LAST_SKIP_BITS(re, &s->gb, 1);
836 j = s->scantable.permutated[i];
838 block[j] = ((quant_matrix[j]^val) - val) << Al;
842 CLOSE_READER(re, &s->gb);
846 run = ((unsigned) code) >> 4;
853 UPDATE_CACHE(re, &s->gb);
854 run += SHOW_UBITS(re, &s->gb, val);
855 LAST_SKIP_BITS(re, &s->gb, val);
867 for (; i <= last; i++) {
868 j = s->scantable.permutated[i];
872 CLOSE_READER(re, &s->gb);
879 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
884 if (s->restart_interval) {
886 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
887 align_get_bits(&s->gb);
888 for (i = 0; i < nb_components; i++) /* reset dc */
889 s->last_dc[i] = (4 << s->bits);
892 i = 8 + ((-get_bits_count(&s->gb)) & 7);
894 if (s->restart_count == 0) {
895 if( show_bits(&s->gb, i) == (1 << i) - 1
896 || show_bits(&s->gb, i) == 0xFF) {
897 int pos = get_bits_count(&s->gb);
898 align_get_bits(&s->gb);
899 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
900 skip_bits(&s->gb, 8);
901 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
902 for (i = 0; i < nb_components; i++) /* reset dc */
903 s->last_dc[i] = (4 << s->bits);
906 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
913 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
916 uint16_t (*buffer)[4];
917 int left[4], top[4], topleft[4];
918 const int linesize = s->linesize[0];
919 const int mask = ((1 << s->bits) - 1) << point_transform;
923 if (s->nb_components != 3 && s->nb_components != 4)
924 return AVERROR_INVALIDDATA;
925 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
926 return AVERROR_INVALIDDATA;
929 s->restart_count = s->restart_interval;
931 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
932 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
933 buffer = s->ljpeg_buffer;
935 for (i = 0; i < 4; i++)
936 buffer[0][i] = 1 << (s->bits - 1);
938 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
939 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
941 if (s->interlaced && s->bottom_field)
942 ptr += linesize >> 1;
944 for (i = 0; i < 4; i++)
945 top[i] = left[i] = topleft[i] = buffer[0][i];
947 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
948 int modified_predictor = predictor;
950 if (s->restart_interval && !s->restart_count){
951 s->restart_count = s->restart_interval;
955 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
957 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
958 modified_predictor = 1;
960 for (i=0;i<nb_components;i++) {
964 top[i] = buffer[mb_x][i];
966 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
968 dc = mjpeg_decode_dc(s, s->dc_index[i]);
972 left[i] = buffer[mb_x][i] =
973 mask & (pred + (dc << point_transform));
976 if (s->restart_interval && !--s->restart_count) {
977 align_get_bits(&s->gb);
978 skip_bits(&s->gb, 16); /* skip RSTn */
981 if (s->nb_components == 4) {
982 for(i=0; i<nb_components; i++) {
983 int c= s->comp_index[i];
985 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
986 ptr[4*mb_x+3-c] = buffer[mb_x][i];
988 } else if(s->bits == 9) {
989 return AVERROR_PATCHWELCOME;
991 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
992 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
997 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
998 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
999 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1000 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1002 } else if (s->pegasus_rct) {
1003 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1004 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
1005 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1006 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1009 for(i=0; i<nb_components; i++) {
1010 int c= s->comp_index[i];
1012 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1013 ptr[3*mb_x+2-c] = buffer[mb_x][i];
1015 } else if(s->bits == 9) {
1016 return AVERROR_PATCHWELCOME;
1018 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1019 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
1028 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1029 int point_transform, int nb_components)
1031 int i, mb_x, mb_y, mask;
1032 int bits= (s->bits+7)&~7;
1033 int resync_mb_y = 0;
1034 int resync_mb_x = 0;
1036 point_transform += bits - s->bits;
1037 mask = ((1 << s->bits) - 1) << point_transform;
1039 av_assert0(nb_components>=1 && nb_components<=4);
1041 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1042 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1043 if (s->restart_interval && !s->restart_count){
1044 s->restart_count = s->restart_interval;
1049 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1050 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1051 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1052 for (i = 0; i < nb_components; i++) {
1055 int n, h, v, x, y, c, j, linesize;
1056 n = s->nb_blocks[i];
1057 c = s->comp_index[i];
1062 linesize= s->linesize[c];
1064 if(bits>8) linesize /= 2;
1066 for(j=0; j<n; j++) {
1069 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1073 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1075 if(x==0 && leftcol){
1076 pred= 1 << (bits - 1);
1081 if(x==0 && leftcol){
1082 pred= ptr[-linesize];
1084 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1088 if (s->interlaced && s->bottom_field)
1089 ptr += linesize >> 1;
1091 *ptr= pred + (dc << point_transform);
1093 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1095 if(x==0 && leftcol){
1096 pred= 1 << (bits - 1);
1101 if(x==0 && leftcol){
1102 pred= ptr16[-linesize];
1104 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1108 if (s->interlaced && s->bottom_field)
1109 ptr16 += linesize >> 1;
1111 *ptr16= pred + (dc << point_transform);
1120 for (i = 0; i < nb_components; i++) {
1123 int n, h, v, x, y, c, j, linesize, dc;
1124 n = s->nb_blocks[i];
1125 c = s->comp_index[i];
1130 linesize = s->linesize[c];
1132 if(bits>8) linesize /= 2;
1134 for (j = 0; j < n; j++) {
1137 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1141 ptr = s->picture_ptr->data[c] +
1142 (linesize * (v * mb_y + y)) +
1143 (h * mb_x + x); //FIXME optimize this crap
1144 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1147 *ptr = pred + (dc << point_transform);
1149 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1150 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1153 *ptr16= pred + (dc << point_transform);
1163 if (s->restart_interval && !--s->restart_count) {
1164 align_get_bits(&s->gb);
1165 skip_bits(&s->gb, 16); /* skip RSTn */
1172 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1173 uint8_t *dst, const uint8_t *src,
1174 int linesize, int lowres)
1177 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1179 case 1: copy_block4(dst, src, linesize, linesize, 4);
1181 case 2: copy_block2(dst, src, linesize, linesize, 2);
1183 case 3: *dst = *src;
1188 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1190 int block_x, block_y;
1191 int size = 8 >> s->avctx->lowres;
1193 for (block_y=0; block_y<size; block_y++)
1194 for (block_x=0; block_x<size; block_x++)
1195 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1197 for (block_y=0; block_y<size; block_y++)
1198 for (block_x=0; block_x<size; block_x++)
1199 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1203 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1204 int Al, const uint8_t *mb_bitmask,
1205 int mb_bitmask_size,
1206 const AVFrame *reference)
1209 uint8_t *data[MAX_COMPONENTS];
1210 const uint8_t *reference_data[MAX_COMPONENTS];
1211 int linesize[MAX_COMPONENTS];
1212 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1213 int bytes_per_pixel = 1 + (s->bits > 8);
1216 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1217 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1218 return AVERROR_INVALIDDATA;
1220 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1223 s->restart_count = 0;
1225 for (i = 0; i < nb_components; i++) {
1226 int c = s->comp_index[i];
1227 data[c] = s->picture_ptr->data[c];
1228 reference_data[c] = reference ? reference->data[c] : NULL;
1229 linesize[c] = s->linesize[c];
1230 s->coefs_finished[c] |= 1;
1233 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1234 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1235 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1237 if (s->restart_interval && !s->restart_count)
1238 s->restart_count = s->restart_interval;
1240 if (get_bits_left(&s->gb) < 0) {
1241 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1242 -get_bits_left(&s->gb));
1243 return AVERROR_INVALIDDATA;
1245 for (i = 0; i < nb_components; i++) {
1247 int n, h, v, x, y, c, j;
1249 n = s->nb_blocks[i];
1250 c = s->comp_index[i];
1255 for (j = 0; j < n; j++) {
1256 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1257 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1259 if (s->interlaced && s->bottom_field)
1260 block_offset += linesize[c] >> 1;
1261 if ( 8*(h * mb_x + x) < s->width
1262 && 8*(v * mb_y + y) < s->height) {
1263 ptr = data[c] + block_offset;
1266 if (!s->progressive) {
1269 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1270 linesize[c], s->avctx->lowres);
1273 s->bdsp.clear_block(s->block);
1274 if (decode_block(s, s->block, i,
1275 s->dc_index[i], s->ac_index[i],
1276 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1277 av_log(s->avctx, AV_LOG_ERROR,
1278 "error y=%d x=%d\n", mb_y, mb_x);
1279 return AVERROR_INVALIDDATA;
1282 s->idsp.idct_put(ptr, linesize[c], s->block);
1284 shift_output(s, ptr, linesize[c]);
1288 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1290 int16_t *block = s->blocks[c][block_idx];
1292 block[0] += get_bits1(&s->gb) *
1293 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1294 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1295 s->quant_matrixes[s->quant_sindex[i]],
1297 av_log(s->avctx, AV_LOG_ERROR,
1298 "error y=%d x=%d\n", mb_y, mb_x);
1299 return AVERROR_INVALIDDATA;
1302 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1303 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1304 mb_x, mb_y, x, y, c, s->bottom_field,
1305 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1313 handle_rstn(s, nb_components);
1319 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1320 int se, int Ah, int Al)
1324 int c = s->comp_index[0];
1325 uint8_t *data = s->picture_ptr->data[c];
1326 int linesize = s->linesize[c];
1328 int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1329 int bytes_per_pixel = 1 + (s->bits > 8);
1331 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1332 if (se < ss || se > 63) {
1333 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1334 return AVERROR_INVALIDDATA;
1338 // s->coefs_finished is a bitmask for coefficients coded
1339 // ss and se are parameters telling start and end coefficients
1340 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1341 last_scan = !~s->coefs_finished[c];
1344 if (s->interlaced && s->bottom_field)
1345 data += linesize >> 1;
1347 s->restart_count = 0;
1349 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1350 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1351 int block_idx = mb_y * s->block_stride[c];
1352 int16_t (*block)[64] = &s->blocks[c][block_idx];
1353 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1354 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1356 if (s->restart_interval && !s->restart_count)
1357 s->restart_count = s->restart_interval;
1360 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1361 quant_matrix, ss, se, Al, &EOBRUN);
1363 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1364 quant_matrix, ss, se, Al, &EOBRUN);
1366 av_log(s->avctx, AV_LOG_ERROR,
1367 "error y=%d x=%d\n", mb_y, mb_x);
1368 return AVERROR_INVALIDDATA;
1372 s->idsp.idct_put(ptr, linesize, *block);
1374 shift_output(s, ptr, linesize);
1375 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1377 if (handle_rstn(s, 0))
1384 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1385 int mb_bitmask_size, const AVFrame *reference)
1387 int len, nb_components, i, h, v, predictor, point_transform;
1389 const int block_size = s->lossless ? 1 : 8;
1390 int ilv, prev_shift;
1392 if (!s->got_picture) {
1393 av_log(s->avctx, AV_LOG_WARNING,
1394 "Can not process SOS before SOF, skipping\n");
1398 av_assert0(s->picture_ptr->data[0]);
1399 /* XXX: verify len field validity */
1400 len = get_bits(&s->gb, 16);
1401 nb_components = get_bits(&s->gb, 8);
1402 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1403 av_log(s->avctx, AV_LOG_ERROR,
1404 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1405 return AVERROR_PATCHWELCOME;
1407 if (len != 6 + 2 * nb_components) {
1408 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1409 return AVERROR_INVALIDDATA;
1411 for (i = 0; i < nb_components; i++) {
1412 id = get_bits(&s->gb, 8) - 1;
1413 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1414 /* find component index */
1415 for (index = 0; index < s->nb_components; index++)
1416 if (id == s->component_id[index])
1418 if (index == s->nb_components) {
1419 av_log(s->avctx, AV_LOG_ERROR,
1420 "decode_sos: index(%d) out of components\n", index);
1421 return AVERROR_INVALIDDATA;
1423 /* Metasoft MJPEG codec has Cb and Cr swapped */
1424 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1425 && nb_components == 3 && s->nb_components == 3 && i)
1428 s->quant_sindex[i] = s->quant_index[index];
1429 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1430 s->h_scount[i] = s->h_count[index];
1431 s->v_scount[i] = s->v_count[index];
1433 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1435 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1436 index = (index+2)%3;
1438 s->comp_index[i] = index;
1440 s->dc_index[i] = get_bits(&s->gb, 4);
1441 s->ac_index[i] = get_bits(&s->gb, 4);
1443 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1444 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1446 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))
1450 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1451 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1452 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1453 prev_shift = get_bits(&s->gb, 4); /* Ah */
1454 point_transform = get_bits(&s->gb, 4); /* Al */
1456 prev_shift = point_transform = 0;
1458 if (nb_components > 1) {
1459 /* interleaved stream */
1460 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1461 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1462 } else if (!s->ls) { /* skip this for JPEG-LS */
1463 h = s->h_max / s->h_scount[0];
1464 v = s->v_max / s->v_scount[0];
1465 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1466 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1467 s->nb_blocks[0] = 1;
1472 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1473 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1474 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1475 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1476 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1479 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1480 for (i = s->mjpb_skiptosod; i > 0; i--)
1481 skip_bits(&s->gb, 8);
1484 for (i = 0; i < nb_components; i++)
1485 s->last_dc[i] = (4 << s->bits);
1488 av_assert0(s->picture_ptr == s->picture);
1489 if (CONFIG_JPEGLS_DECODER && s->ls) {
1491 // reset_ls_coding_parameters(s, 0);
1493 if ((ret = ff_jpegls_decode_picture(s, predictor,
1494 point_transform, ilv)) < 0)
1498 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1501 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1503 nb_components)) < 0)
1508 if (s->progressive && predictor) {
1509 av_assert0(s->picture_ptr == s->picture);
1510 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1512 point_transform)) < 0)
1515 if ((ret = mjpeg_decode_scan(s, nb_components,
1516 prev_shift, point_transform,
1517 mb_bitmask, mb_bitmask_size, reference)) < 0)
1522 if (s->interlaced &&
1523 get_bits_left(&s->gb) > 32 &&
1524 show_bits(&s->gb, 8) == 0xFF) {
1525 GetBitContext bak = s->gb;
1526 align_get_bits(&bak);
1527 if (show_bits(&bak, 16) == 0xFFD1) {
1528 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1530 skip_bits(&s->gb, 16);
1531 s->bottom_field ^= 1;
1540 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1541 return AVERROR_INVALIDDATA;
1544 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1546 if (get_bits(&s->gb, 16) != 4)
1547 return AVERROR_INVALIDDATA;
1548 s->restart_interval = get_bits(&s->gb, 16);
1549 s->restart_count = 0;
1550 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1551 s->restart_interval);
1556 static int mjpeg_decode_app(MJpegDecodeContext *s)
1560 len = get_bits(&s->gb, 16);
1562 return AVERROR_INVALIDDATA;
1563 if (8 * len > get_bits_left(&s->gb))
1564 return AVERROR_INVALIDDATA;
1566 id = get_bits_long(&s->gb, 32);
1569 if (s->avctx->debug & FF_DEBUG_STARTCODE) {
1571 av_get_codec_tag_string(id_str, sizeof(id_str), av_bswap32(id));
1572 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n", id_str, id, len);
1575 /* Buggy AVID, it puts EOI only at every 10th frame. */
1576 /* Also, this fourcc is used by non-avid files too, it holds some
1577 information, but it's always present in AVID-created files. */
1578 if (id == AV_RB32("AVI1")) {
1584 4bytes field_size_less_padding
1587 i = get_bits(&s->gb, 8); len--;
1588 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1590 skip_bits(&s->gb, 8);
1591 skip_bits(&s->gb, 32);
1592 skip_bits(&s->gb, 32);
1600 if (id == AV_RB32("JFIF")) {
1601 int t_w, t_h, v1, v2;
1602 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1603 v1 = get_bits(&s->gb, 8);
1604 v2 = get_bits(&s->gb, 8);
1605 skip_bits(&s->gb, 8);
1607 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1608 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1609 ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
1611 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1612 av_log(s->avctx, AV_LOG_INFO,
1613 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1615 s->avctx->sample_aspect_ratio.num,
1616 s->avctx->sample_aspect_ratio.den);
1618 t_w = get_bits(&s->gb, 8);
1619 t_h = get_bits(&s->gb, 8);
1621 /* skip thumbnail */
1622 if (len -10 - (t_w * t_h * 3) > 0)
1623 len -= t_w * t_h * 3;
1629 if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1630 skip_bits(&s->gb, 16); /* version */
1631 skip_bits(&s->gb, 16); /* flags0 */
1632 skip_bits(&s->gb, 16); /* flags1 */
1633 s->adobe_transform = get_bits(&s->gb, 8);
1634 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1635 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1640 if (id == AV_RB32("LJIF")) {
1642 int pegasus_rct = s->pegasus_rct;
1643 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1644 av_log(s->avctx, AV_LOG_INFO,
1645 "Pegasus lossless jpeg header found\n");
1646 skip_bits(&s->gb, 16); /* version ? */
1647 skip_bits(&s->gb, 16); /* unknown always 0? */
1648 skip_bits(&s->gb, 16); /* unknown always 0? */
1649 skip_bits(&s->gb, 16); /* unknown always 0? */
1650 switch (i=get_bits(&s->gb, 8)) {
1660 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1665 if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
1666 av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
1671 s->pegasus_rct = pegasus_rct;
1675 if (id == AV_RL32("colr") && len > 0) {
1676 s->colr = get_bits(&s->gb, 8);
1677 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1678 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1682 if (id == AV_RL32("xfrm") && len > 0) {
1683 s->xfrm = get_bits(&s->gb, 8);
1684 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1685 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1690 /* JPS extension by VRex */
1691 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1692 int flags, layout, type;
1693 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1694 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1696 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1697 skip_bits(&s->gb, 16); len -= 2; /* block length */
1698 skip_bits(&s->gb, 8); /* reserved */
1699 flags = get_bits(&s->gb, 8);
1700 layout = get_bits(&s->gb, 8);
1701 type = get_bits(&s->gb, 8);
1704 s->stereo3d = av_stereo3d_alloc();
1709 s->stereo3d->type = AV_STEREO3D_2D;
1710 } else if (type == 1) {
1713 s->stereo3d->type = AV_STEREO3D_LINES;
1716 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1719 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1722 if (!(flags & 0x04)) {
1723 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1730 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1731 GetByteContext gbytes;
1732 int ret, le, ifd_offset, bytes_read;
1733 const uint8_t *aligned;
1735 skip_bits(&s->gb, 16); // skip padding
1738 // init byte wise reading
1739 aligned = align_get_bits(&s->gb);
1740 bytestream2_init(&gbytes, aligned, len);
1743 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1745 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1747 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1749 // read 0th IFD and store the metadata
1750 // (return values > 0 indicate the presence of subimage metadata)
1751 ret = avpriv_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1753 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1757 bytes_read = bytestream2_tell(&gbytes);
1758 skip_bits(&s->gb, bytes_read << 3);
1765 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1766 id = get_bits_long(&s->gb, 32);
1769 if (id == AV_RB32("mjpg")) {
1771 skip_bits(&s->gb, 32); /* field size */
1772 skip_bits(&s->gb, 32); /* pad field size */
1773 skip_bits(&s->gb, 32); /* next off */
1774 skip_bits(&s->gb, 32); /* quant off */
1775 skip_bits(&s->gb, 32); /* huff off */
1776 skip_bits(&s->gb, 32); /* image off */
1777 skip_bits(&s->gb, 32); /* scan off */
1778 skip_bits(&s->gb, 32); /* data off */
1780 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1781 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1786 /* slow but needed for extreme adobe jpegs */
1788 av_log(s->avctx, AV_LOG_ERROR,
1789 "mjpeg: error, decode_app parser read over the end\n");
1791 skip_bits(&s->gb, 8);
1796 static int mjpeg_decode_com(MJpegDecodeContext *s)
1798 int len = get_bits(&s->gb, 16);
1799 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1800 char *cbuf = av_malloc(len - 1);
1803 for (i = 0; i < len - 2; i++)
1804 cbuf[i] = get_bits(&s->gb, 8);
1805 if (i > 0 && cbuf[i - 1] == '\n')
1810 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1811 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1813 /* buggy avid, it puts EOI only at every 10th frame */
1814 if (!strncmp(cbuf, "AVID", 4)) {
1815 parse_avid(s, cbuf, len);
1816 } else if (!strcmp(cbuf, "CS=ITU601"))
1818 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
1819 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1829 /* return the 8 bit start code value and update the search
1830 state. Return -1 if no start code found */
1831 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1833 const uint8_t *buf_ptr;
1838 buf_ptr = *pbuf_ptr;
1839 while (buf_end - buf_ptr > 1) {
1842 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1851 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1852 *pbuf_ptr = buf_ptr;
1856 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1857 const uint8_t **buf_ptr, const uint8_t *buf_end,
1858 const uint8_t **unescaped_buf_ptr,
1859 int *unescaped_buf_size)
1862 start_code = find_marker(buf_ptr, buf_end);
1864 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1866 return AVERROR(ENOMEM);
1868 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1869 if (start_code == SOS && !s->ls) {
1870 const uint8_t *src = *buf_ptr;
1871 uint8_t *dst = s->buffer;
1873 while (src < buf_end) {
1874 uint8_t x = *(src++);
1877 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1879 while (src < buf_end && x == 0xff)
1882 if (x >= 0xd0 && x <= 0xd7)
1889 *unescaped_buf_ptr = s->buffer;
1890 *unescaped_buf_size = dst - s->buffer;
1891 memset(s->buffer + *unescaped_buf_size, 0,
1892 FF_INPUT_BUFFER_PADDING_SIZE);
1894 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
1895 (buf_end - *buf_ptr) - (dst - s->buffer));
1896 } else if (start_code == SOS && s->ls) {
1897 const uint8_t *src = *buf_ptr;
1898 uint8_t *dst = s->buffer;
1904 while (src + t < buf_end) {
1905 uint8_t x = src[t++];
1907 while ((src + t < buf_end) && x == 0xff)
1916 init_put_bits(&pb, dst, t);
1918 /* unescape bitstream */
1920 uint8_t x = src[b++];
1921 put_bits(&pb, 8, x);
1925 av_log(s->avctx, AV_LOG_WARNING, "Invalid escape sequence\n");
1928 put_bits(&pb, 7, x);
1932 flush_put_bits(&pb);
1934 *unescaped_buf_ptr = dst;
1935 *unescaped_buf_size = (bit_count + 7) >> 3;
1936 memset(s->buffer + *unescaped_buf_size, 0,
1937 FF_INPUT_BUFFER_PADDING_SIZE);
1939 *unescaped_buf_ptr = *buf_ptr;
1940 *unescaped_buf_size = buf_end - *buf_ptr;
1946 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1949 AVFrame *frame = data;
1950 const uint8_t *buf = avpkt->data;
1951 int buf_size = avpkt->size;
1952 MJpegDecodeContext *s = avctx->priv_data;
1953 const uint8_t *buf_end, *buf_ptr;
1954 const uint8_t *unescaped_buf_ptr;
1956 int unescaped_buf_size;
1962 av_dict_free(&s->exif_metadata);
1963 av_freep(&s->stereo3d);
1964 s->adobe_transform = -1;
1967 buf_end = buf + buf_size;
1968 while (buf_ptr < buf_end) {
1969 /* find start next marker */
1970 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1972 &unescaped_buf_size);
1974 if (start_code < 0) {
1976 } else if (unescaped_buf_size > INT_MAX / 8) {
1977 av_log(avctx, AV_LOG_ERROR,
1978 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1979 start_code, unescaped_buf_size, buf_size);
1980 return AVERROR_INVALIDDATA;
1982 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
1983 start_code, buf_end - buf_ptr);
1985 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
1988 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
1992 s->start_code = start_code;
1993 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1994 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1996 /* process markers */
1997 if (start_code >= 0xd0 && start_code <= 0xd7)
1998 av_log(avctx, AV_LOG_DEBUG,
1999 "restart marker: %d\n", start_code & 0x0f);
2001 else if (start_code >= APP0 && start_code <= APP15)
2002 mjpeg_decode_app(s);
2004 else if (start_code == COM)
2005 mjpeg_decode_com(s);
2009 if (!CONFIG_JPEGLS_DECODER &&
2010 (start_code == SOF48 || start_code == LSE)) {
2011 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
2012 return AVERROR(ENOSYS);
2015 switch (start_code) {
2017 s->restart_interval = 0;
2018 s->restart_count = 0;
2019 /* nothing to do on SOI */
2022 ff_mjpeg_decode_dqt(s);
2025 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
2026 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
2035 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2042 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2049 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2056 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2060 if (!CONFIG_JPEGLS_DECODER ||
2061 (ret = ff_jpegls_decode_lse(s)) < 0)
2067 if (!s->got_picture) {
2068 av_log(avctx, AV_LOG_WARNING,
2069 "Found EOI before any SOF, ignoring\n");
2072 if (s->interlaced) {
2073 s->bottom_field ^= 1;
2074 /* if not bottom field, do not output image yet */
2075 if (s->bottom_field == !s->interlace_polarity)
2078 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2084 int qp = FFMAX3(s->qscale[0],
2087 int qpw = (s->width + 15) / 16;
2088 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2090 memset(qp_table_buf->data, qp, qpw);
2091 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2094 if(avctx->debug & FF_DEBUG_QP)
2095 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2101 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2102 (avctx->err_recognition & AV_EF_EXPLODE))
2106 mjpeg_decode_dri(s);
2118 av_log(avctx, AV_LOG_ERROR,
2119 "mjpeg: unsupported coding type (%x)\n", start_code);
2123 /* eof process start code */
2124 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2125 av_log(avctx, AV_LOG_DEBUG,
2126 "marker parser used %d bytes (%d bits)\n",
2127 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2129 if (s->got_picture && s->cur_scan) {
2130 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2133 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2134 return AVERROR_INVALIDDATA;
2140 is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step_minus1;
2142 if (AV_RB32(s->upscale_h)) {
2144 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2145 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2146 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2147 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2148 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2149 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2150 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2151 avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2152 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2153 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2154 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2155 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2157 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2158 for (p = 0; p<4; p++) {
2159 uint8_t *line = s->picture_ptr->data[p];
2162 if (!s->upscale_h[p])
2165 w = FF_CEIL_RSHIFT(w, hshift);
2166 h = FF_CEIL_RSHIFT(h, vshift);
2168 if (s->upscale_v[p])
2171 for (i = 0; i < h; i++) {
2172 if (s->upscale_h[p] == 1) {
2173 if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2174 else line[w - 1] = line[(w - 1) / 2];
2175 for (index = w - 2; index > 0; index--) {
2177 ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2179 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2181 } else if (s->upscale_h[p] == 2) {
2183 ((uint16_t*)line)[w - 1] =
2184 ((uint16_t*)line)[w - 2] = ((uint16_t*)line)[(w - 1) / 3];
2187 line[w - 2] = line[(w - 1) / 3];
2189 for (index = w - 3; index > 0; index--) {
2190 line[index] = (line[index / 3] + line[(index + 1) / 3] + line[(index + 2) / 3] + 1) / 3;
2193 line += s->linesize[p];
2197 if (AV_RB32(s->upscale_v)) {
2199 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2200 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2201 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2202 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2203 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2204 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2205 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2206 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2207 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2208 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2209 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2210 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2211 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2213 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2214 for (p = 0; p < 4; p++) {
2218 if (!s->upscale_v[p])
2221 w = FF_CEIL_RSHIFT(w, hshift);
2222 h = FF_CEIL_RSHIFT(h, vshift);
2224 dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2225 for (i = h - 1; i; i--) {
2226 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2227 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2228 if (src1 == src2 || i == h - 1) {
2229 memcpy(dst, src1, w);
2231 for (index = 0; index < w; index++)
2232 dst[index] = (src1[index] + src2[index]) >> 1;
2234 dst -= s->linesize[p];
2240 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2241 for (index=0; index<4; index++) {
2242 uint8_t *dst = s->picture_ptr->data[index];
2243 int w = s->picture_ptr->width;
2244 int h = s->picture_ptr->height;
2245 if(index && index<3){
2246 w = FF_CEIL_RSHIFT(w, hshift);
2247 h = FF_CEIL_RSHIFT(h, vshift);
2250 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2251 for (i=0; i<h/2; i++) {
2253 FFSWAP(int, dst[j], dst2[j]);
2254 dst += s->picture_ptr->linesize[index];
2255 dst2 -= s->picture_ptr->linesize[index];
2260 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2261 int w = s->picture_ptr->width;
2262 int h = s->picture_ptr->height;
2263 for (i=0; i<h; i++) {
2266 for (index=0; index<4; index++) {
2267 dst[index] = s->picture_ptr->data[index]
2268 + s->picture_ptr->linesize[index]*i;
2270 for (j=0; j<w; j++) {
2272 int r = dst[0][j] * k;
2273 int g = dst[1][j] * k;
2274 int b = dst[2][j] * k;
2275 dst[0][j] = g*257 >> 16;
2276 dst[1][j] = b*257 >> 16;
2277 dst[2][j] = r*257 >> 16;
2282 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2283 int w = s->picture_ptr->width;
2284 int h = s->picture_ptr->height;
2285 for (i=0; i<h; i++) {
2288 for (index=0; index<4; index++) {
2289 dst[index] = s->picture_ptr->data[index]
2290 + s->picture_ptr->linesize[index]*i;
2292 for (j=0; j<w; j++) {
2294 int r = (255 - dst[0][j]) * k;
2295 int g = (128 - dst[1][j]) * k;
2296 int b = (128 - dst[2][j]) * k;
2297 dst[0][j] = r*257 >> 16;
2298 dst[1][j] = (g*257 >> 16) + 128;
2299 dst[2][j] = (b*257 >> 16) + 128;
2306 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2308 stereo->type = s->stereo3d->type;
2309 stereo->flags = s->stereo3d->flags;
2311 av_freep(&s->stereo3d);
2314 av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
2315 av_dict_free(&s->exif_metadata);
2317 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2319 // return buf_end - buf_ptr;
2320 return buf_ptr - buf;
2323 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2325 MJpegDecodeContext *s = avctx->priv_data;
2328 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2329 av_log(avctx, AV_LOG_INFO, "Single field\n");
2333 av_frame_free(&s->picture);
2334 s->picture_ptr = NULL;
2335 } else if (s->picture_ptr)
2336 av_frame_unref(s->picture_ptr);
2338 av_freep(&s->buffer);
2339 av_freep(&s->stereo3d);
2340 av_freep(&s->ljpeg_buffer);
2341 s->ljpeg_buffer_size = 0;
2343 for (i = 0; i < 3; i++) {
2344 for (j = 0; j < 4; j++)
2345 ff_free_vlc(&s->vlcs[i][j]);
2347 for (i = 0; i < MAX_COMPONENTS; i++) {
2348 av_freep(&s->blocks[i]);
2349 av_freep(&s->last_nnz[i]);
2351 av_dict_free(&s->exif_metadata);
2355 static void decode_flush(AVCodecContext *avctx)
2357 MJpegDecodeContext *s = avctx->priv_data;
2361 #if CONFIG_MJPEG_DECODER
2362 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2363 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2364 static const AVOption options[] = {
2365 { "extern_huff", "Use external huffman table.",
2366 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
2370 static const AVClass mjpegdec_class = {
2371 .class_name = "MJPEG decoder",
2372 .item_name = av_default_item_name,
2374 .version = LIBAVUTIL_VERSION_INT,
2377 AVCodec ff_mjpeg_decoder = {
2379 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2380 .type = AVMEDIA_TYPE_VIDEO,
2381 .id = AV_CODEC_ID_MJPEG,
2382 .priv_data_size = sizeof(MJpegDecodeContext),
2383 .init = ff_mjpeg_decode_init,
2384 .close = ff_mjpeg_decode_end,
2385 .decode = ff_mjpeg_decode_frame,
2386 .flush = decode_flush,
2387 .capabilities = CODEC_CAP_DR1,
2389 .priv_class = &mjpegdec_class,
2390 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
2393 #if CONFIG_THP_DECODER
2394 AVCodec ff_thp_decoder = {
2396 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2397 .type = AVMEDIA_TYPE_VIDEO,
2398 .id = AV_CODEC_ID_THP,
2399 .priv_data_size = sizeof(MJpegDecodeContext),
2400 .init = ff_mjpeg_decode_init,
2401 .close = ff_mjpeg_decode_end,
2402 .decode = ff_mjpeg_decode_frame,
2403 .flush = decode_flush,
2404 .capabilities = CODEC_CAP_DR1,
2406 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,