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"
42 #include "jpegtables.h"
45 #include "jpeglsdec.h"
49 #include "bytestream.h"
52 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
53 const uint8_t *val_table, int nb_codes,
54 int use_static, int is_ac)
56 uint8_t huff_size[256] = { 0 };
57 uint16_t huff_code[256];
58 uint16_t huff_sym[256];
61 av_assert0(nb_codes <= 256);
63 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
65 for (i = 0; i < 256; i++)
66 huff_sym[i] = i + 16 * is_ac;
69 huff_sym[0] = 16 * 256;
71 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
72 huff_code, 2, 2, huff_sym, 2, 2, use_static);
75 static int build_basic_mjpeg_vlc(MJpegDecodeContext *s)
79 if ((ret = build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
80 avpriv_mjpeg_val_dc, 12, 0, 0)) < 0)
83 if ((ret = build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
84 avpriv_mjpeg_val_dc, 12, 0, 0)) < 0)
87 if ((ret = build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
88 avpriv_mjpeg_val_ac_luminance, 251, 0, 1)) < 0)
91 if ((ret = build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
92 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1)) < 0)
95 if ((ret = build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
96 avpriv_mjpeg_val_ac_luminance, 251, 0, 0)) < 0)
99 if ((ret = build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
100 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0)) < 0)
107 static void parse_avid(MJpegDecodeContext *s, uint8_t *buf, int len)
110 if (len > 14 && buf[12] == 1) /* 1 - NTSC */
111 s->interlace_polarity = 1;
112 if (len > 14 && buf[12] == 2) /* 2 - PAL */
113 s->interlace_polarity = 0;
114 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
115 av_log(s->avctx, AV_LOG_INFO, "AVID: len:%d %d\n", len, len > 14 ? buf[12] : -1);
118 static void init_idct(AVCodecContext *avctx)
120 MJpegDecodeContext *s = avctx->priv_data;
122 ff_idctdsp_init(&s->idsp, avctx);
123 ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
127 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
129 MJpegDecodeContext *s = avctx->priv_data;
132 if (!s->picture_ptr) {
133 s->picture = av_frame_alloc();
135 return AVERROR(ENOMEM);
136 s->picture_ptr = s->picture;
140 ff_blockdsp_init(&s->bdsp, avctx);
141 ff_hpeldsp_init(&s->hdsp, avctx->flags);
146 s->first_picture = 1;
148 s->org_height = avctx->coded_height;
149 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
150 avctx->colorspace = AVCOL_SPC_BT470BG;
151 s->hwaccel_pix_fmt = s->hwaccel_sw_pix_fmt = AV_PIX_FMT_NONE;
153 if ((ret = build_basic_mjpeg_vlc(s)) < 0)
156 if (s->extern_huff) {
157 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
158 if ((ret = init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8)) < 0)
160 if (ff_mjpeg_decode_dht(s)) {
161 av_log(avctx, AV_LOG_ERROR,
162 "error using external huffman table, switching back to internal\n");
163 build_basic_mjpeg_vlc(s);
166 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
167 s->interlace_polarity = 1; /* bottom field first */
168 av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
169 } else if (avctx->field_order == AV_FIELD_UNKNOWN) {
170 if (avctx->codec_tag == AV_RL32("MJPG"))
171 s->interlace_polarity = 1;
174 if ( avctx->extradata_size > 8
175 && AV_RL32(avctx->extradata) == 0x2C
176 && AV_RL32(avctx->extradata+4) == 0x18) {
177 parse_avid(s, avctx->extradata, avctx->extradata_size);
180 if (avctx->codec->id == AV_CODEC_ID_AMV)
187 /* quantize tables */
188 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
192 len = get_bits(&s->gb, 16) - 2;
194 if (8*len > get_bits_left(&s->gb)) {
195 av_log(s->avctx, AV_LOG_ERROR, "dqt: len %d is too large\n", len);
196 return AVERROR_INVALIDDATA;
200 int pr = get_bits(&s->gb, 4);
202 av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
203 return AVERROR_INVALIDDATA;
205 index = get_bits(&s->gb, 4);
208 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
209 /* read quant table */
210 for (i = 0; i < 64; i++) {
211 s->quant_matrixes[index][i] = get_bits(&s->gb, pr ? 16 : 8);
212 if (s->quant_matrixes[index][i] == 0) {
213 av_log(s->avctx, AV_LOG_ERROR, "dqt: 0 quant value\n");
214 return AVERROR_INVALIDDATA;
218 // XXX FIXME fine-tune, and perhaps add dc too
219 s->qscale[index] = FFMAX(s->quant_matrixes[index][1],
220 s->quant_matrixes[index][8]) >> 1;
221 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
222 index, s->qscale[index]);
223 len -= 1 + 64 * (1+pr);
228 /* decode huffman tables and build VLC decoders */
229 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
231 int len, index, i, class, n, v, code_max;
232 uint8_t bits_table[17];
233 uint8_t val_table[256];
236 len = get_bits(&s->gb, 16) - 2;
238 if (8*len > get_bits_left(&s->gb)) {
239 av_log(s->avctx, AV_LOG_ERROR, "dht: len %d is too large\n", len);
240 return AVERROR_INVALIDDATA;
245 return AVERROR_INVALIDDATA;
246 class = get_bits(&s->gb, 4);
248 return AVERROR_INVALIDDATA;
249 index = get_bits(&s->gb, 4);
251 return AVERROR_INVALIDDATA;
253 for (i = 1; i <= 16; i++) {
254 bits_table[i] = get_bits(&s->gb, 8);
258 if (len < n || n > 256)
259 return AVERROR_INVALIDDATA;
262 for (i = 0; i < n; i++) {
263 v = get_bits(&s->gb, 8);
270 /* build VLC and flush previous vlc if present */
271 ff_free_vlc(&s->vlcs[class][index]);
272 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
273 class, index, code_max + 1);
274 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
275 code_max + 1, 0, class > 0)) < 0)
279 ff_free_vlc(&s->vlcs[2][index]);
280 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
281 code_max + 1, 0, 0)) < 0)
285 for (i = 0; i < 16; i++)
286 s->raw_huffman_lengths[class][index][i] = bits_table[i + 1];
287 for (i = 0; i < 256; i++)
288 s->raw_huffman_values[class][index][i] = val_table[i];
293 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
295 int len, nb_components, i, width, height, bits, ret, size_change;
297 int h_count[MAX_COMPONENTS] = { 0 };
298 int v_count[MAX_COMPONENTS] = { 0 };
301 memset(s->upscale_h, 0, sizeof(s->upscale_h));
302 memset(s->upscale_v, 0, sizeof(s->upscale_v));
304 /* XXX: verify len field validity */
305 len = get_bits(&s->gb, 16);
306 bits = get_bits(&s->gb, 8);
308 if (bits > 16 || bits < 1) {
309 av_log(s->avctx, AV_LOG_ERROR, "bits %d is invalid\n", bits);
310 return AVERROR_INVALIDDATA;
313 if (s->avctx->bits_per_raw_sample != bits) {
314 av_log(s->avctx, s->avctx->bits_per_raw_sample > 0 ? AV_LOG_INFO : AV_LOG_DEBUG, "Changing bps from %d to %d\n", s->avctx->bits_per_raw_sample, bits);
315 s->avctx->bits_per_raw_sample = bits;
320 if (bits == 9 && !s->pegasus_rct)
321 s->rct = 1; // FIXME ugly
323 if(s->lossless && s->avctx->lowres){
324 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
328 height = get_bits(&s->gb, 16);
329 width = get_bits(&s->gb, 16);
331 // HACK for odd_height.mov
332 if (s->interlaced && s->width == width && s->height == height + 1)
335 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
336 if (av_image_check_size(width, height, 0, s->avctx) < 0)
337 return AVERROR_INVALIDDATA;
338 if (s->buf_size && (width + 7) / 8 * ((height + 7) / 8) > s->buf_size * 4LL)
339 return AVERROR_INVALIDDATA;
341 nb_components = get_bits(&s->gb, 8);
342 if (nb_components <= 0 ||
343 nb_components > MAX_COMPONENTS)
345 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
346 if (nb_components != s->nb_components) {
347 av_log(s->avctx, AV_LOG_ERROR,
348 "nb_components changing in interlaced picture\n");
349 return AVERROR_INVALIDDATA;
352 if (s->ls && !(bits <= 8 || nb_components == 1)) {
353 avpriv_report_missing_feature(s->avctx,
354 "JPEG-LS that is not <= 8 "
355 "bits/component or 16-bit gray");
356 return AVERROR_PATCHWELCOME;
358 s->nb_components = nb_components;
361 for (i = 0; i < nb_components; i++) {
363 s->component_id[i] = get_bits(&s->gb, 8) - 1;
364 h_count[i] = get_bits(&s->gb, 4);
365 v_count[i] = get_bits(&s->gb, 4);
366 /* compute hmax and vmax (only used in interleaved case) */
367 if (h_count[i] > s->h_max)
368 s->h_max = h_count[i];
369 if (v_count[i] > s->v_max)
370 s->v_max = v_count[i];
371 s->quant_index[i] = get_bits(&s->gb, 8);
372 if (s->quant_index[i] >= 4) {
373 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
374 return AVERROR_INVALIDDATA;
376 if (!h_count[i] || !v_count[i]) {
377 av_log(s->avctx, AV_LOG_ERROR,
378 "Invalid sampling factor in component %d %d:%d\n",
379 i, h_count[i], v_count[i]);
380 return AVERROR_INVALIDDATA;
383 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
384 i, h_count[i], v_count[i],
385 s->component_id[i], s->quant_index[i]);
387 if ( nb_components == 4
388 && s->component_id[0] == 'C' - 1
389 && s->component_id[1] == 'M' - 1
390 && s->component_id[2] == 'Y' - 1
391 && s->component_id[3] == 'K' - 1)
392 s->adobe_transform = 0;
394 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
395 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
396 return AVERROR_PATCHWELCOME;
400 /* if different size, realloc/alloc picture */
401 if (width != s->width || height != s->height || bits != s->bits ||
402 memcmp(s->h_count, h_count, sizeof(h_count)) ||
403 memcmp(s->v_count, v_count, sizeof(v_count))) {
409 memcpy(s->h_count, h_count, sizeof(h_count));
410 memcpy(s->v_count, v_count, sizeof(v_count));
414 /* test interlaced mode */
415 if (s->first_picture &&
416 (s->multiscope != 2 || s->avctx->time_base.den >= 25 * s->avctx->time_base.num) &&
417 s->org_height != 0 &&
418 s->height < ((s->org_height * 3) / 4)) {
420 s->bottom_field = s->interlace_polarity;
421 s->picture_ptr->interlaced_frame = 1;
422 s->picture_ptr->top_field_first = !s->interlace_polarity;
426 ret = ff_set_dimensions(s->avctx, width, height);
430 s->first_picture = 0;
435 if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
436 if (s->progressive) {
437 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
438 return AVERROR_INVALIDDATA;
441 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
443 else if (!s->lossless)
445 /* XXX: not complete test ! */
446 pix_fmt_id = ((unsigned)s->h_count[0] << 28) | (s->v_count[0] << 24) |
447 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
448 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
449 (s->h_count[3] << 4) | s->v_count[3];
450 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
451 /* NOTE we do not allocate pictures large enough for the possible
452 * padding of h/v_count being 4 */
453 if (!(pix_fmt_id & 0xD0D0D0D0))
454 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
455 if (!(pix_fmt_id & 0x0D0D0D0D))
456 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
458 for (i = 0; i < 8; i++) {
459 int j = 6 + (i&1) - (i&6);
460 int is = (pix_fmt_id >> (4*i)) & 0xF;
461 int js = (pix_fmt_id >> (4*j)) & 0xF;
463 if (is == 1 && js != 2 && (i < 2 || i > 5))
464 js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
465 if (is == 1 && js != 2 && (i < 2 || i > 5))
466 js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
468 if (is == 1 && js == 2) {
469 if (i & 1) s->upscale_h[j/2] = 1;
470 else s->upscale_v[j/2] = 1;
474 switch (pix_fmt_id) {
477 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
479 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
480 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
482 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
483 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
484 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
487 av_assert0(s->nb_components == 3);
491 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
493 if (s->adobe_transform == 0 && s->bits <= 8) {
494 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
496 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
497 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
500 av_assert0(s->nb_components == 4);
504 if (s->adobe_transform == 0 && s->bits <= 8) {
505 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
506 s->upscale_v[1] = s->upscale_v[2] = 1;
507 s->upscale_h[1] = s->upscale_h[2] = 1;
508 } else if (s->adobe_transform == 2 && s->bits <= 8) {
509 s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
510 s->upscale_v[1] = s->upscale_v[2] = 1;
511 s->upscale_h[1] = s->upscale_h[2] = 1;
512 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
514 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
515 else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
516 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
518 av_assert0(s->nb_components == 4);
524 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
527 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
532 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
535 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
547 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
549 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
556 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
557 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
560 s->upscale_v[0] = s->upscale_v[1] = 1;
562 if (pix_fmt_id == 0x14111100)
563 s->upscale_v[1] = s->upscale_v[2] = 1;
564 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
567 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
571 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
572 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
575 s->upscale_h[0] = s->upscale_h[1] = 1;
577 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
578 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
579 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
585 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
586 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
587 s->upscale_h[1] = s->upscale_h[2] = 2;
591 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
594 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
599 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
600 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
601 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
602 if (pix_fmt_id == 0x42111100) {
605 s->upscale_h[1] = s->upscale_h[2] = 1;
606 } else if (pix_fmt_id == 0x24111100) {
609 s->upscale_v[1] = s->upscale_v[2] = 1;
613 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
616 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
620 avpriv_report_missing_feature(s->avctx, "Pixel format 0x%x bits:%d", pix_fmt_id, s->bits);
621 memset(s->upscale_h, 0, sizeof(s->upscale_h));
622 memset(s->upscale_v, 0, sizeof(s->upscale_v));
623 return AVERROR_PATCHWELCOME;
625 if ((AV_RB32(s->upscale_h) || AV_RB32(s->upscale_v)) && s->avctx->lowres) {
626 avpriv_report_missing_feature(s->avctx, "Lowres for weird subsampling");
627 return AVERROR_PATCHWELCOME;
629 if ((AV_RB32(s->upscale_h) || AV_RB32(s->upscale_v)) && s->progressive && s->avctx->pix_fmt == AV_PIX_FMT_GBRP) {
630 avpriv_report_missing_feature(s->avctx, "progressive for weird subsampling");
631 return AVERROR_PATCHWELCOME;
634 memset(s->upscale_h, 0, sizeof(s->upscale_h));
635 memset(s->upscale_v, 0, sizeof(s->upscale_v));
636 if (s->nb_components == 3) {
637 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
638 } else if (s->nb_components != 1) {
639 av_log(s->avctx, AV_LOG_ERROR, "Unsupported number of components %d\n", s->nb_components);
640 return AVERROR_PATCHWELCOME;
641 } else if (s->palette_index && s->bits <= 8)
642 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
643 else if (s->bits <= 8)
644 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
646 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
649 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
651 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
655 if (s->avctx->pix_fmt == s->hwaccel_sw_pix_fmt && !size_change) {
656 s->avctx->pix_fmt = s->hwaccel_pix_fmt;
658 enum AVPixelFormat pix_fmts[] = {
659 #if CONFIG_MJPEG_NVDEC_HWACCEL
662 #if CONFIG_MJPEG_VAAPI_HWACCEL
668 s->hwaccel_pix_fmt = ff_get_format(s->avctx, pix_fmts);
669 if (s->hwaccel_pix_fmt < 0)
670 return AVERROR(EINVAL);
672 s->hwaccel_sw_pix_fmt = s->avctx->pix_fmt;
673 s->avctx->pix_fmt = s->hwaccel_pix_fmt;
676 if (s->avctx->skip_frame == AVDISCARD_ALL) {
677 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
678 s->picture_ptr->key_frame = 1;
683 av_frame_unref(s->picture_ptr);
684 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
686 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
687 s->picture_ptr->key_frame = 1;
690 for (i = 0; i < 4; i++)
691 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
693 ff_dlog(s->avctx, "%d %d %d %d %d %d\n",
694 s->width, s->height, s->linesize[0], s->linesize[1],
695 s->interlaced, s->avctx->height);
697 if (len != (8 + (3 * nb_components)))
698 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
701 if ((s->rgb && !s->lossless && !s->ls) ||
702 (!s->rgb && s->ls && s->nb_components > 1)) {
703 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
704 return AVERROR_PATCHWELCOME;
707 /* totally blank picture as progressive JPEG will only add details to it */
708 if (s->progressive) {
709 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
710 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
711 for (i = 0; i < s->nb_components; i++) {
712 int size = bw * bh * s->h_count[i] * s->v_count[i];
713 av_freep(&s->blocks[i]);
714 av_freep(&s->last_nnz[i]);
715 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
716 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
717 if (!s->blocks[i] || !s->last_nnz[i])
718 return AVERROR(ENOMEM);
719 s->block_stride[i] = bw * s->h_count[i];
721 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
724 if (s->avctx->hwaccel) {
725 s->hwaccel_picture_private =
726 av_mallocz(s->avctx->hwaccel->frame_priv_data_size);
727 if (!s->hwaccel_picture_private)
728 return AVERROR(ENOMEM);
730 ret = s->avctx->hwaccel->start_frame(s->avctx, s->raw_image_buffer,
731 s->raw_image_buffer_size);
739 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
742 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
743 if (code < 0 || code > 16) {
744 av_log(s->avctx, AV_LOG_WARNING,
745 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
746 0, dc_index, &s->vlcs[0][dc_index]);
751 return get_xbits(&s->gb, code);
756 /* decode block and dequantize */
757 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
758 int dc_index, int ac_index, uint16_t *quant_matrix)
760 int code, i, j, level, val;
763 val = mjpeg_decode_dc(s, dc_index);
764 if (val == 0xfffff) {
765 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
766 return AVERROR_INVALIDDATA;
768 val = val * (unsigned)quant_matrix[0] + s->last_dc[component];
769 val = av_clip_int16(val);
770 s->last_dc[component] = val;
774 {OPEN_READER(re, &s->gb);
776 UPDATE_CACHE(re, &s->gb);
777 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
779 i += ((unsigned)code) >> 4;
782 if (code > MIN_CACHE_BITS - 16)
783 UPDATE_CACHE(re, &s->gb);
786 int cache = GET_CACHE(re, &s->gb);
787 int sign = (~cache) >> 31;
788 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
791 LAST_SKIP_BITS(re, &s->gb, code);
794 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
795 return AVERROR_INVALIDDATA;
797 j = s->scantable.permutated[i];
798 block[j] = level * quant_matrix[i];
801 CLOSE_READER(re, &s->gb);}
806 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
807 int component, int dc_index,
808 uint16_t *quant_matrix, int Al)
811 s->bdsp.clear_block(block);
812 val = mjpeg_decode_dc(s, dc_index);
813 if (val == 0xfffff) {
814 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
815 return AVERROR_INVALIDDATA;
817 val = (val * (quant_matrix[0] << Al)) + s->last_dc[component];
818 s->last_dc[component] = val;
823 /* decode block and dequantize - progressive JPEG version */
824 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
825 uint8_t *last_nnz, int ac_index,
826 uint16_t *quant_matrix,
827 int ss, int se, int Al, int *EOBRUN)
829 int code, i, j, val, run;
838 OPEN_READER(re, &s->gb);
839 for (i = ss; ; i++) {
840 UPDATE_CACHE(re, &s->gb);
841 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
843 run = ((unsigned) code) >> 4;
847 if (code > MIN_CACHE_BITS - 16)
848 UPDATE_CACHE(re, &s->gb);
851 int cache = GET_CACHE(re, &s->gb);
852 int sign = (~cache) >> 31;
853 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
856 LAST_SKIP_BITS(re, &s->gb, code);
860 j = s->scantable.permutated[se];
861 block[j] = level * (quant_matrix[se] << Al);
864 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
865 return AVERROR_INVALIDDATA;
867 j = s->scantable.permutated[i];
868 block[j] = level * (quant_matrix[i] << Al);
870 if (run == 0xF) {// ZRL - skip 15 coefficients
873 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
874 return AVERROR_INVALIDDATA;
879 UPDATE_CACHE(re, &s->gb);
880 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
881 LAST_SKIP_BITS(re, &s->gb, run);
888 CLOSE_READER(re, &s->gb);
897 #define REFINE_BIT(j) { \
898 UPDATE_CACHE(re, &s->gb); \
899 sign = block[j] >> 15; \
900 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
901 ((quant_matrix[i] ^ sign) - sign) << Al; \
902 LAST_SKIP_BITS(re, &s->gb, 1); \
910 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
915 j = s->scantable.permutated[i]; \
918 else if (run-- == 0) \
922 /* decode block and dequantize - progressive JPEG refinement pass */
923 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
925 int ac_index, uint16_t *quant_matrix,
926 int ss, int se, int Al, int *EOBRUN)
928 int code, i = ss, j, sign, val, run;
929 int last = FFMIN(se, *last_nnz);
931 OPEN_READER(re, &s->gb);
936 UPDATE_CACHE(re, &s->gb);
937 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
940 run = ((unsigned) code) >> 4;
941 UPDATE_CACHE(re, &s->gb);
942 val = SHOW_UBITS(re, &s->gb, 1);
943 LAST_SKIP_BITS(re, &s->gb, 1);
945 j = s->scantable.permutated[i];
947 block[j] = ((quant_matrix[i] << Al) ^ val) - val;
951 CLOSE_READER(re, &s->gb);
955 run = ((unsigned) code) >> 4;
962 UPDATE_CACHE(re, &s->gb);
963 run += SHOW_UBITS(re, &s->gb, val);
964 LAST_SKIP_BITS(re, &s->gb, val);
976 for (; i <= last; i++) {
977 j = s->scantable.permutated[i];
981 CLOSE_READER(re, &s->gb);
988 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
993 if (s->restart_interval) {
995 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
996 align_get_bits(&s->gb);
997 for (i = 0; i < nb_components; i++) /* reset dc */
998 s->last_dc[i] = (4 << s->bits);
1001 i = 8 + ((-get_bits_count(&s->gb)) & 7);
1003 if (s->restart_count == 0) {
1004 if( show_bits(&s->gb, i) == (1 << i) - 1
1005 || show_bits(&s->gb, i) == 0xFF) {
1006 int pos = get_bits_count(&s->gb);
1007 align_get_bits(&s->gb);
1008 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
1009 skip_bits(&s->gb, 8);
1010 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
1011 for (i = 0; i < nb_components; i++) /* reset dc */
1012 s->last_dc[i] = (4 << s->bits);
1015 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
1022 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
1025 uint16_t (*buffer)[4];
1026 int left[4], top[4], topleft[4];
1027 const int linesize = s->linesize[0];
1028 const int mask = ((1 << s->bits) - 1) << point_transform;
1029 int resync_mb_y = 0;
1030 int resync_mb_x = 0;
1032 if (s->nb_components != 3 && s->nb_components != 4)
1033 return AVERROR_INVALIDDATA;
1034 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
1035 return AVERROR_INVALIDDATA;
1038 s->restart_count = s->restart_interval;
1040 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
1041 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
1042 if (!s->ljpeg_buffer)
1043 return AVERROR(ENOMEM);
1045 buffer = s->ljpeg_buffer;
1047 for (i = 0; i < 4; i++)
1048 buffer[0][i] = 1 << (s->bits - 1);
1050 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1051 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
1053 if (s->interlaced && s->bottom_field)
1054 ptr += linesize >> 1;
1056 for (i = 0; i < 4; i++)
1057 top[i] = left[i] = topleft[i] = buffer[0][i];
1059 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1060 int modified_predictor = predictor;
1062 if (get_bits_left(&s->gb) < 1) {
1063 av_log(s->avctx, AV_LOG_ERROR, "bitstream end in rgb_scan\n");
1064 return AVERROR_INVALIDDATA;
1067 if (s->restart_interval && !s->restart_count){
1068 s->restart_count = s->restart_interval;
1072 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
1074 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
1075 modified_predictor = 1;
1077 for (i=0;i<nb_components;i++) {
1080 topleft[i] = top[i];
1081 top[i] = buffer[mb_x][i];
1083 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
1085 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1089 left[i] = buffer[mb_x][i] =
1090 mask & (pred + (unsigned)(dc * (1 << point_transform)));
1093 if (s->restart_interval && !--s->restart_count) {
1094 align_get_bits(&s->gb);
1095 skip_bits(&s->gb, 16); /* skip RSTn */
1098 if (s->rct && s->nb_components == 4) {
1099 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1100 ptr[4*mb_x + 2] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1101 ptr[4*mb_x + 1] = buffer[mb_x][1] + ptr[4*mb_x + 2];
1102 ptr[4*mb_x + 3] = buffer[mb_x][2] + ptr[4*mb_x + 2];
1103 ptr[4*mb_x + 0] = buffer[mb_x][3];
1105 } else if (s->nb_components == 4) {
1106 for(i=0; i<nb_components; i++) {
1107 int c= s->comp_index[i];
1109 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1110 ptr[4*mb_x+3-c] = buffer[mb_x][i];
1112 } else if(s->bits == 9) {
1113 return AVERROR_PATCHWELCOME;
1115 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1116 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
1120 } else if (s->rct) {
1121 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1122 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1123 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1124 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1126 } else if (s->pegasus_rct) {
1127 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1128 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
1129 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1130 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1133 for(i=0; i<nb_components; i++) {
1134 int c= s->comp_index[i];
1136 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1137 ptr[3*mb_x+2-c] = buffer[mb_x][i];
1139 } else if(s->bits == 9) {
1140 return AVERROR_PATCHWELCOME;
1142 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1143 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
1152 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1153 int point_transform, int nb_components)
1155 int i, mb_x, mb_y, mask;
1156 int bits= (s->bits+7)&~7;
1157 int resync_mb_y = 0;
1158 int resync_mb_x = 0;
1160 point_transform += bits - s->bits;
1161 mask = ((1 << s->bits) - 1) << point_transform;
1163 av_assert0(nb_components>=1 && nb_components<=4);
1165 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1166 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1167 if (get_bits_left(&s->gb) < 1) {
1168 av_log(s->avctx, AV_LOG_ERROR, "bitstream end in yuv_scan\n");
1169 return AVERROR_INVALIDDATA;
1171 if (s->restart_interval && !s->restart_count){
1172 s->restart_count = s->restart_interval;
1177 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1178 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1179 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1180 for (i = 0; i < nb_components; i++) {
1183 int n, h, v, x, y, c, j, linesize;
1184 n = s->nb_blocks[i];
1185 c = s->comp_index[i];
1190 linesize= s->linesize[c];
1192 if(bits>8) linesize /= 2;
1194 for(j=0; j<n; j++) {
1197 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1200 if ( h * mb_x + x >= s->width
1201 || v * mb_y + y >= s->height) {
1203 } else if (bits<=8) {
1204 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1206 if(x==0 && leftcol){
1207 pred= 1 << (bits - 1);
1212 if(x==0 && leftcol){
1213 pred= ptr[-linesize];
1215 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1219 if (s->interlaced && s->bottom_field)
1220 ptr += linesize >> 1;
1222 *ptr= pred + ((unsigned)dc << point_transform);
1224 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1226 if(x==0 && leftcol){
1227 pred= 1 << (bits - 1);
1232 if(x==0 && leftcol){
1233 pred= ptr16[-linesize];
1235 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1239 if (s->interlaced && s->bottom_field)
1240 ptr16 += linesize >> 1;
1242 *ptr16= pred + ((unsigned)dc << point_transform);
1251 for (i = 0; i < nb_components; i++) {
1254 int n, h, v, x, y, c, j, linesize, dc;
1255 n = s->nb_blocks[i];
1256 c = s->comp_index[i];
1261 linesize = s->linesize[c];
1263 if(bits>8) linesize /= 2;
1265 for (j = 0; j < n; j++) {
1268 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1271 if ( h * mb_x + x >= s->width
1272 || v * mb_y + y >= s->height) {
1274 } else if (bits<=8) {
1275 ptr = s->picture_ptr->data[c] +
1276 (linesize * (v * mb_y + y)) +
1277 (h * mb_x + x); //FIXME optimize this crap
1278 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1281 *ptr = pred + ((unsigned)dc << point_transform);
1283 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1284 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1287 *ptr16= pred + ((unsigned)dc << point_transform);
1297 if (s->restart_interval && !--s->restart_count) {
1298 align_get_bits(&s->gb);
1299 skip_bits(&s->gb, 16); /* skip RSTn */
1306 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1307 uint8_t *dst, const uint8_t *src,
1308 int linesize, int lowres)
1311 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1313 case 1: copy_block4(dst, src, linesize, linesize, 4);
1315 case 2: copy_block2(dst, src, linesize, linesize, 2);
1317 case 3: *dst = *src;
1322 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1324 int block_x, block_y;
1325 int size = 8 >> s->avctx->lowres;
1327 for (block_y=0; block_y<size; block_y++)
1328 for (block_x=0; block_x<size; block_x++)
1329 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1331 for (block_y=0; block_y<size; block_y++)
1332 for (block_x=0; block_x<size; block_x++)
1333 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1337 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1338 int Al, const uint8_t *mb_bitmask,
1339 int mb_bitmask_size,
1340 const AVFrame *reference)
1342 int i, mb_x, mb_y, chroma_h_shift, chroma_v_shift, chroma_width, chroma_height;
1343 uint8_t *data[MAX_COMPONENTS];
1344 const uint8_t *reference_data[MAX_COMPONENTS];
1345 int linesize[MAX_COMPONENTS];
1346 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1347 int bytes_per_pixel = 1 + (s->bits > 8);
1350 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1351 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1352 return AVERROR_INVALIDDATA;
1354 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1357 s->restart_count = 0;
1359 av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &chroma_h_shift,
1361 chroma_width = AV_CEIL_RSHIFT(s->width, chroma_h_shift);
1362 chroma_height = AV_CEIL_RSHIFT(s->height, chroma_v_shift);
1364 for (i = 0; i < nb_components; i++) {
1365 int c = s->comp_index[i];
1366 data[c] = s->picture_ptr->data[c];
1367 reference_data[c] = reference ? reference->data[c] : NULL;
1368 linesize[c] = s->linesize[c];
1369 s->coefs_finished[c] |= 1;
1372 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1373 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1374 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1376 if (s->restart_interval && !s->restart_count)
1377 s->restart_count = s->restart_interval;
1379 if (get_bits_left(&s->gb) < 0) {
1380 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1381 -get_bits_left(&s->gb));
1382 return AVERROR_INVALIDDATA;
1384 for (i = 0; i < nb_components; i++) {
1386 int n, h, v, x, y, c, j;
1388 n = s->nb_blocks[i];
1389 c = s->comp_index[i];
1394 for (j = 0; j < n; j++) {
1395 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1396 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1398 if (s->interlaced && s->bottom_field)
1399 block_offset += linesize[c] >> 1;
1400 if ( 8*(h * mb_x + x) < ((c == 1) || (c == 2) ? chroma_width : s->width)
1401 && 8*(v * mb_y + y) < ((c == 1) || (c == 2) ? chroma_height : s->height)) {
1402 ptr = data[c] + block_offset;
1405 if (!s->progressive) {
1408 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1409 linesize[c], s->avctx->lowres);
1412 s->bdsp.clear_block(s->block);
1413 if (decode_block(s, s->block, i,
1414 s->dc_index[i], s->ac_index[i],
1415 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1416 av_log(s->avctx, AV_LOG_ERROR,
1417 "error y=%d x=%d\n", mb_y, mb_x);
1418 return AVERROR_INVALIDDATA;
1421 s->idsp.idct_put(ptr, linesize[c], s->block);
1423 shift_output(s, ptr, linesize[c]);
1427 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1429 int16_t *block = s->blocks[c][block_idx];
1431 block[0] += get_bits1(&s->gb) *
1432 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1433 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1434 s->quant_matrixes[s->quant_sindex[i]],
1436 av_log(s->avctx, AV_LOG_ERROR,
1437 "error y=%d x=%d\n", mb_y, mb_x);
1438 return AVERROR_INVALIDDATA;
1441 ff_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1442 ff_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1443 mb_x, mb_y, x, y, c, s->bottom_field,
1444 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1452 handle_rstn(s, nb_components);
1458 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1459 int se, int Ah, int Al)
1463 int c = s->comp_index[0];
1464 uint16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1466 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1467 if (se < ss || se > 63) {
1468 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1469 return AVERROR_INVALIDDATA;
1472 // s->coefs_finished is a bitmask for coefficients coded
1473 // ss and se are parameters telling start and end coefficients
1474 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1476 s->restart_count = 0;
1478 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1479 int block_idx = mb_y * s->block_stride[c];
1480 int16_t (*block)[64] = &s->blocks[c][block_idx];
1481 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1482 if (get_bits_left(&s->gb) <= 0) {
1483 av_log(s->avctx, AV_LOG_ERROR, "bitstream truncated in mjpeg_decode_scan_progressive_ac\n");
1484 return AVERROR_INVALIDDATA;
1486 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1488 if (s->restart_interval && !s->restart_count)
1489 s->restart_count = s->restart_interval;
1492 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1493 quant_matrix, ss, se, Al, &EOBRUN);
1495 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1496 quant_matrix, ss, se, Al, &EOBRUN);
1498 av_log(s->avctx, AV_LOG_ERROR,
1499 "error y=%d x=%d\n", mb_y, mb_x);
1500 return AVERROR_INVALIDDATA;
1503 if (handle_rstn(s, 0))
1510 static void mjpeg_idct_scan_progressive_ac(MJpegDecodeContext *s)
1514 const int bytes_per_pixel = 1 + (s->bits > 8);
1515 const int block_size = s->lossless ? 1 : 8;
1517 for (c = 0; c < s->nb_components; c++) {
1518 uint8_t *data = s->picture_ptr->data[c];
1519 int linesize = s->linesize[c];
1520 int h = s->h_max / s->h_count[c];
1521 int v = s->v_max / s->v_count[c];
1522 int mb_width = (s->width + h * block_size - 1) / (h * block_size);
1523 int mb_height = (s->height + v * block_size - 1) / (v * block_size);
1525 if (~s->coefs_finished[c])
1526 av_log(s->avctx, AV_LOG_WARNING, "component %d is incomplete\n", c);
1528 if (s->interlaced && s->bottom_field)
1529 data += linesize >> 1;
1531 for (mb_y = 0; mb_y < mb_height; mb_y++) {
1532 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1533 int block_idx = mb_y * s->block_stride[c];
1534 int16_t (*block)[64] = &s->blocks[c][block_idx];
1535 for (mb_x = 0; mb_x < mb_width; mb_x++, block++) {
1536 s->idsp.idct_put(ptr, linesize, *block);
1538 shift_output(s, ptr, linesize);
1539 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1545 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1546 int mb_bitmask_size, const AVFrame *reference)
1548 int len, nb_components, i, h, v, predictor, point_transform;
1550 const int block_size = s->lossless ? 1 : 8;
1551 int ilv, prev_shift;
1553 if (!s->got_picture) {
1554 av_log(s->avctx, AV_LOG_WARNING,
1555 "Can not process SOS before SOF, skipping\n");
1560 if (reference->width != s->picture_ptr->width ||
1561 reference->height != s->picture_ptr->height ||
1562 reference->format != s->picture_ptr->format) {
1563 av_log(s->avctx, AV_LOG_ERROR, "Reference mismatching\n");
1564 return AVERROR_INVALIDDATA;
1568 /* XXX: verify len field validity */
1569 len = get_bits(&s->gb, 16);
1570 nb_components = get_bits(&s->gb, 8);
1571 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1572 avpriv_report_missing_feature(s->avctx,
1573 "decode_sos: nb_components (%d)",
1575 return AVERROR_PATCHWELCOME;
1577 if (len != 6 + 2 * nb_components) {
1578 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1579 return AVERROR_INVALIDDATA;
1581 for (i = 0; i < nb_components; i++) {
1582 id = get_bits(&s->gb, 8) - 1;
1583 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1584 /* find component index */
1585 for (index = 0; index < s->nb_components; index++)
1586 if (id == s->component_id[index])
1588 if (index == s->nb_components) {
1589 av_log(s->avctx, AV_LOG_ERROR,
1590 "decode_sos: index(%d) out of components\n", index);
1591 return AVERROR_INVALIDDATA;
1593 /* Metasoft MJPEG codec has Cb and Cr swapped */
1594 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1595 && nb_components == 3 && s->nb_components == 3 && i)
1598 s->quant_sindex[i] = s->quant_index[index];
1599 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1600 s->h_scount[i] = s->h_count[index];
1601 s->v_scount[i] = s->v_count[index];
1603 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1605 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1606 index = (index+2)%3;
1608 s->comp_index[i] = index;
1610 s->dc_index[i] = get_bits(&s->gb, 4);
1611 s->ac_index[i] = get_bits(&s->gb, 4);
1613 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1614 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1616 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))
1620 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1621 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1622 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1623 prev_shift = get_bits(&s->gb, 4); /* Ah */
1624 point_transform = get_bits(&s->gb, 4); /* Al */
1626 prev_shift = point_transform = 0;
1628 if (nb_components > 1) {
1629 /* interleaved stream */
1630 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1631 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1632 } else if (!s->ls) { /* skip this for JPEG-LS */
1633 h = s->h_max / s->h_scount[0];
1634 v = s->v_max / s->v_scount[0];
1635 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1636 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1637 s->nb_blocks[0] = 1;
1642 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1643 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1644 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1645 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1646 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1649 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1650 for (i = s->mjpb_skiptosod; i > 0; i--)
1651 skip_bits(&s->gb, 8);
1654 for (i = 0; i < nb_components; i++)
1655 s->last_dc[i] = (4 << s->bits);
1657 if (s->avctx->hwaccel) {
1658 int bytes_to_start = get_bits_count(&s->gb) / 8;
1659 av_assert0(bytes_to_start >= 0 &&
1660 s->raw_scan_buffer_size >= bytes_to_start);
1662 ret = s->avctx->hwaccel->decode_slice(s->avctx,
1663 s->raw_scan_buffer + bytes_to_start,
1664 s->raw_scan_buffer_size - bytes_to_start);
1668 } else if (s->lossless) {
1669 av_assert0(s->picture_ptr == s->picture);
1670 if (CONFIG_JPEGLS_DECODER && s->ls) {
1672 // reset_ls_coding_parameters(s, 0);
1674 if ((ret = ff_jpegls_decode_picture(s, predictor,
1675 point_transform, ilv)) < 0)
1679 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1682 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1684 nb_components)) < 0)
1689 if (s->progressive && predictor) {
1690 av_assert0(s->picture_ptr == s->picture);
1691 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1693 point_transform)) < 0)
1696 if ((ret = mjpeg_decode_scan(s, nb_components,
1697 prev_shift, point_transform,
1698 mb_bitmask, mb_bitmask_size, reference)) < 0)
1703 if (s->interlaced &&
1704 get_bits_left(&s->gb) > 32 &&
1705 show_bits(&s->gb, 8) == 0xFF) {
1706 GetBitContext bak = s->gb;
1707 align_get_bits(&bak);
1708 if (show_bits(&bak, 16) == 0xFFD1) {
1709 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1711 skip_bits(&s->gb, 16);
1712 s->bottom_field ^= 1;
1721 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1722 return AVERROR_INVALIDDATA;
1725 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1727 if (get_bits(&s->gb, 16) != 4)
1728 return AVERROR_INVALIDDATA;
1729 s->restart_interval = get_bits(&s->gb, 16);
1730 s->restart_count = 0;
1731 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1732 s->restart_interval);
1737 static int mjpeg_decode_app(MJpegDecodeContext *s)
1741 len = get_bits(&s->gb, 16);
1743 return AVERROR_INVALIDDATA;
1744 if (8 * len > get_bits_left(&s->gb))
1745 return AVERROR_INVALIDDATA;
1747 id = get_bits_long(&s->gb, 32);
1750 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1751 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n",
1752 av_fourcc2str(av_bswap32(id)), id, len);
1754 /* Buggy AVID, it puts EOI only at every 10th frame. */
1755 /* Also, this fourcc is used by non-avid files too, it holds some
1756 information, but it's always present in AVID-created files. */
1757 if (id == AV_RB32("AVI1")) {
1763 4bytes field_size_less_padding
1766 i = get_bits(&s->gb, 8); len--;
1767 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1771 if (id == AV_RB32("JFIF")) {
1772 int t_w, t_h, v1, v2;
1775 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1776 v1 = get_bits(&s->gb, 8);
1777 v2 = get_bits(&s->gb, 8);
1778 skip_bits(&s->gb, 8);
1780 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1781 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1782 if ( s->avctx->sample_aspect_ratio.num <= 0
1783 || s->avctx->sample_aspect_ratio.den <= 0) {
1784 s->avctx->sample_aspect_ratio.num = 0;
1785 s->avctx->sample_aspect_ratio.den = 1;
1788 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1789 av_log(s->avctx, AV_LOG_INFO,
1790 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1792 s->avctx->sample_aspect_ratio.num,
1793 s->avctx->sample_aspect_ratio.den);
1797 t_w = get_bits(&s->gb, 8);
1798 t_h = get_bits(&s->gb, 8);
1800 /* skip thumbnail */
1801 if (len -10 - (t_w * t_h * 3) > 0)
1802 len -= t_w * t_h * 3;
1809 if ( id == AV_RB32("Adob")
1811 && show_bits(&s->gb, 8) == 'e'
1812 && show_bits_long(&s->gb, 32) != AV_RB32("e_CM")) {
1813 skip_bits(&s->gb, 8); /* 'e' */
1814 skip_bits(&s->gb, 16); /* version */
1815 skip_bits(&s->gb, 16); /* flags0 */
1816 skip_bits(&s->gb, 16); /* flags1 */
1817 s->adobe_transform = get_bits(&s->gb, 8);
1818 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1819 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1824 if (id == AV_RB32("LJIF")) {
1826 int pegasus_rct = s->pegasus_rct;
1827 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1828 av_log(s->avctx, AV_LOG_INFO,
1829 "Pegasus lossless jpeg header found\n");
1830 skip_bits(&s->gb, 16); /* version ? */
1831 skip_bits(&s->gb, 16); /* unknown always 0? */
1832 skip_bits(&s->gb, 16); /* unknown always 0? */
1833 skip_bits(&s->gb, 16); /* unknown always 0? */
1834 switch (i=get_bits(&s->gb, 8)) {
1844 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1849 if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
1850 av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
1855 s->pegasus_rct = pegasus_rct;
1859 if (id == AV_RL32("colr") && len > 0) {
1860 s->colr = get_bits(&s->gb, 8);
1861 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1862 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1866 if (id == AV_RL32("xfrm") && len > 0) {
1867 s->xfrm = get_bits(&s->gb, 8);
1868 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1869 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1874 /* JPS extension by VRex */
1875 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1876 int flags, layout, type;
1877 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1878 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1880 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1881 skip_bits(&s->gb, 16); len -= 2; /* block length */
1882 skip_bits(&s->gb, 8); /* reserved */
1883 flags = get_bits(&s->gb, 8);
1884 layout = get_bits(&s->gb, 8);
1885 type = get_bits(&s->gb, 8);
1888 s->stereo3d = av_stereo3d_alloc();
1893 s->stereo3d->type = AV_STEREO3D_2D;
1894 } else if (type == 1) {
1897 s->stereo3d->type = AV_STEREO3D_LINES;
1900 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1903 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1906 if (!(flags & 0x04)) {
1907 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1914 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1915 GetByteContext gbytes;
1916 int ret, le, ifd_offset, bytes_read;
1917 const uint8_t *aligned;
1919 skip_bits(&s->gb, 16); // skip padding
1922 // init byte wise reading
1923 aligned = align_get_bits(&s->gb);
1924 bytestream2_init(&gbytes, aligned, len);
1927 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1929 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1931 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1933 // read 0th IFD and store the metadata
1934 // (return values > 0 indicate the presence of subimage metadata)
1935 ret = ff_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1937 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1941 bytes_read = bytestream2_tell(&gbytes);
1942 skip_bits(&s->gb, bytes_read << 3);
1949 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1950 id = get_bits_long(&s->gb, 32);
1953 if (id == AV_RB32("mjpg")) {
1956 4bytes pad field size
1964 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1965 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1969 if (s->start_code == APP2 && id == AV_RB32("ICC_") && len >= 10) {
1972 unsigned nummarkers;
1974 id = get_bits_long(&s->gb, 32);
1975 id2 = get_bits_long(&s->gb, 24);
1977 if (id != AV_RB32("PROF") || id2 != AV_RB24("ILE")) {
1978 av_log(s->avctx, AV_LOG_WARNING, "Invalid ICC_PROFILE header in APP2\n");
1982 skip_bits(&s->gb, 8);
1983 seqno = get_bits(&s->gb, 8);
1986 av_log(s->avctx, AV_LOG_WARNING, "Invalid sequence number in APP2\n");
1990 nummarkers = get_bits(&s->gb, 8);
1992 if (nummarkers == 0) {
1993 av_log(s->avctx, AV_LOG_WARNING, "Invalid number of markers coded in APP2\n");
1995 } else if (s->iccnum != 0 && nummarkers != s->iccnum) {
1996 av_log(s->avctx, AV_LOG_WARNING, "Mistmatch in coded number of ICC markers between markers\n");
1998 } else if (seqno > nummarkers) {
1999 av_log(s->avctx, AV_LOG_WARNING, "Mismatching sequence number and coded number of ICC markers\n");
2003 /* Allocate if this is the first APP2 we've seen. */
2004 if (s->iccnum == 0) {
2005 s->iccdata = av_mallocz(nummarkers * sizeof(*(s->iccdata)));
2006 s->iccdatalens = av_mallocz(nummarkers * sizeof(*(s->iccdatalens)));
2007 if (!s->iccdata || !s->iccdatalens) {
2008 av_log(s->avctx, AV_LOG_ERROR, "Could not allocate ICC data arrays\n");
2009 return AVERROR(ENOMEM);
2011 s->iccnum = nummarkers;
2014 if (s->iccdata[seqno - 1]) {
2015 av_log(s->avctx, AV_LOG_WARNING, "Duplicate ICC sequence number\n");
2019 s->iccdatalens[seqno - 1] = len;
2020 s->iccdata[seqno - 1] = av_malloc(len);
2021 if (!s->iccdata[seqno - 1]) {
2022 av_log(s->avctx, AV_LOG_ERROR, "Could not allocate ICC data buffer\n");
2023 return AVERROR(ENOMEM);
2026 memcpy(s->iccdata[seqno - 1], align_get_bits(&s->gb), len);
2027 skip_bits(&s->gb, len << 3);
2031 if (s->iccread > s->iccnum)
2032 av_log(s->avctx, AV_LOG_WARNING, "Read more ICC markers than are supposed to be coded\n");
2036 /* slow but needed for extreme adobe jpegs */
2038 av_log(s->avctx, AV_LOG_ERROR,
2039 "mjpeg: error, decode_app parser read over the end\n");
2041 skip_bits(&s->gb, 8);
2046 static int mjpeg_decode_com(MJpegDecodeContext *s)
2048 int len = get_bits(&s->gb, 16);
2049 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
2051 char *cbuf = av_malloc(len - 1);
2053 return AVERROR(ENOMEM);
2055 for (i = 0; i < len - 2; i++)
2056 cbuf[i] = get_bits(&s->gb, 8);
2057 if (i > 0 && cbuf[i - 1] == '\n')
2062 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2063 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
2065 /* buggy avid, it puts EOI only at every 10th frame */
2066 if (!strncmp(cbuf, "AVID", 4)) {
2067 parse_avid(s, cbuf, len);
2068 } else if (!strcmp(cbuf, "CS=ITU601"))
2070 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
2071 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
2073 else if (!strcmp(cbuf, "MULTISCOPE II")) {
2074 s->avctx->sample_aspect_ratio = (AVRational) { 1, 2 };
2084 /* return the 8 bit start code value and update the search
2085 state. Return -1 if no start code found */
2086 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
2088 const uint8_t *buf_ptr;
2093 buf_ptr = *pbuf_ptr;
2094 while (buf_end - buf_ptr > 1) {
2097 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
2106 ff_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
2107 *pbuf_ptr = buf_ptr;
2111 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
2112 const uint8_t **buf_ptr, const uint8_t *buf_end,
2113 const uint8_t **unescaped_buf_ptr,
2114 int *unescaped_buf_size)
2117 start_code = find_marker(buf_ptr, buf_end);
2119 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
2121 return AVERROR(ENOMEM);
2123 /* unescape buffer of SOS, use special treatment for JPEG-LS */
2124 if (start_code == SOS && !s->ls) {
2125 const uint8_t *src = *buf_ptr;
2126 const uint8_t *ptr = src;
2127 uint8_t *dst = s->buffer;
2129 #define copy_data_segment(skip) do { \
2130 ptrdiff_t length = (ptr - src) - (skip); \
2132 memcpy(dst, src, length); \
2138 if (s->avctx->codec_id == AV_CODEC_ID_THP) {
2140 copy_data_segment(0);
2142 while (ptr < buf_end) {
2143 uint8_t x = *(ptr++);
2147 while (ptr < buf_end && x == 0xff) {
2152 /* 0xFF, 0xFF, ... */
2154 copy_data_segment(skip);
2156 /* decrement src as it is equal to ptr after the
2157 * copy_data_segment macro and we might want to
2158 * copy the current value of x later on */
2162 if (x < 0xd0 || x > 0xd7) {
2163 copy_data_segment(1);
2170 copy_data_segment(0);
2172 #undef copy_data_segment
2174 *unescaped_buf_ptr = s->buffer;
2175 *unescaped_buf_size = dst - s->buffer;
2176 memset(s->buffer + *unescaped_buf_size, 0,
2177 AV_INPUT_BUFFER_PADDING_SIZE);
2179 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
2180 (buf_end - *buf_ptr) - (dst - s->buffer));
2181 } else if (start_code == SOS && s->ls) {
2182 const uint8_t *src = *buf_ptr;
2183 uint8_t *dst = s->buffer;
2189 while (src + t < buf_end) {
2190 uint8_t x = src[t++];
2192 while ((src + t < buf_end) && x == 0xff)
2201 init_put_bits(&pb, dst, t);
2203 /* unescape bitstream */
2205 uint8_t x = src[b++];
2206 put_bits(&pb, 8, x);
2207 if (x == 0xFF && b < t) {
2210 av_log(s->avctx, AV_LOG_WARNING, "Invalid escape sequence\n");
2213 put_bits(&pb, 7, x);
2217 flush_put_bits(&pb);
2219 *unescaped_buf_ptr = dst;
2220 *unescaped_buf_size = (bit_count + 7) >> 3;
2221 memset(s->buffer + *unescaped_buf_size, 0,
2222 AV_INPUT_BUFFER_PADDING_SIZE);
2224 *unescaped_buf_ptr = *buf_ptr;
2225 *unescaped_buf_size = buf_end - *buf_ptr;
2231 static void reset_icc_profile(MJpegDecodeContext *s)
2236 for (i = 0; i < s->iccnum; i++)
2237 av_freep(&s->iccdata[i]);
2238 av_freep(&s->iccdata);
2239 av_freep(&s->iccdatalens);
2245 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
2248 AVFrame *frame = data;
2249 const uint8_t *buf = avpkt->data;
2250 int buf_size = avpkt->size;
2251 MJpegDecodeContext *s = avctx->priv_data;
2252 const uint8_t *buf_end, *buf_ptr;
2253 const uint8_t *unescaped_buf_ptr;
2255 int unescaped_buf_size;
2261 s->buf_size = buf_size;
2263 av_dict_free(&s->exif_metadata);
2264 av_freep(&s->stereo3d);
2265 s->adobe_transform = -1;
2268 reset_icc_profile(s);
2271 buf_end = buf + buf_size;
2272 while (buf_ptr < buf_end) {
2273 /* find start next marker */
2274 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
2276 &unescaped_buf_size);
2278 if (start_code < 0) {
2280 } else if (unescaped_buf_size > INT_MAX / 8) {
2281 av_log(avctx, AV_LOG_ERROR,
2282 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
2283 start_code, unescaped_buf_size, buf_size);
2284 return AVERROR_INVALIDDATA;
2286 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
2287 start_code, buf_end - buf_ptr);
2289 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
2292 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
2296 s->start_code = start_code;
2297 if (s->avctx->debug & FF_DEBUG_STARTCODE)
2298 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
2300 /* process markers */
2301 if (start_code >= 0xd0 && start_code <= 0xd7) {
2302 av_log(avctx, AV_LOG_DEBUG,
2303 "restart marker: %d\n", start_code & 0x0f);
2305 } else if (start_code >= APP0 && start_code <= APP15) {
2306 if ((ret = mjpeg_decode_app(s)) < 0)
2307 av_log(avctx, AV_LOG_ERROR, "unable to decode APP fields: %s\n",
2310 } else if (start_code == COM) {
2311 ret = mjpeg_decode_com(s);
2314 } else if (start_code == DQT) {
2315 ret = ff_mjpeg_decode_dqt(s);
2322 if (!CONFIG_JPEGLS_DECODER &&
2323 (start_code == SOF48 || start_code == LSE)) {
2324 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
2325 return AVERROR(ENOSYS);
2328 if (avctx->skip_frame == AVDISCARD_ALL) {
2329 switch(start_code) {
2344 switch (start_code) {
2346 s->restart_interval = 0;
2347 s->restart_count = 0;
2348 s->raw_image_buffer = buf_ptr;
2349 s->raw_image_buffer_size = buf_end - buf_ptr;
2350 /* nothing to do on SOI */
2353 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
2354 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
2360 if (start_code == SOF0)
2361 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_BASELINE_DCT;
2363 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_EXTENDED_SEQUENTIAL_DCT;
2367 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2371 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_PROGRESSIVE_DCT;
2375 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2379 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_LOSSLESS;
2380 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2384 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2388 s->avctx->profile = FF_PROFILE_MJPEG_JPEG_LS;
2389 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2393 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2397 if (!CONFIG_JPEGLS_DECODER ||
2398 (ret = ff_jpegls_decode_lse(s)) < 0)
2403 if (!avctx->hwaccel && avctx->skip_frame != AVDISCARD_ALL &&
2404 s->progressive && s->cur_scan && s->got_picture)
2405 mjpeg_idct_scan_progressive_ac(s);
2407 if (!s->got_picture) {
2408 av_log(avctx, AV_LOG_WARNING,
2409 "Found EOI before any SOF, ignoring\n");
2412 if (s->interlaced) {
2413 s->bottom_field ^= 1;
2414 /* if not bottom field, do not output image yet */
2415 if (s->bottom_field == !s->interlace_polarity)
2418 if (avctx->skip_frame == AVDISCARD_ALL) {
2420 goto the_end_no_picture;
2422 if (s->avctx->hwaccel) {
2423 ret = s->avctx->hwaccel->end_frame(s->avctx);
2427 av_freep(&s->hwaccel_picture_private);
2429 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2435 int qp = FFMAX3(s->qscale[0],
2438 int qpw = (s->width + 15) / 16;
2439 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2441 memset(qp_table_buf->data, qp, qpw);
2442 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2445 if(avctx->debug & FF_DEBUG_QP)
2446 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2451 s->raw_scan_buffer = buf_ptr;
2452 s->raw_scan_buffer_size = buf_end - buf_ptr;
2455 if (avctx->skip_frame == AVDISCARD_ALL) {
2456 skip_bits(&s->gb, get_bits_left(&s->gb));
2460 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2461 (avctx->err_recognition & AV_EF_EXPLODE))
2465 if ((ret = mjpeg_decode_dri(s)) < 0)
2478 av_log(avctx, AV_LOG_ERROR,
2479 "mjpeg: unsupported coding type (%x)\n", start_code);
2484 /* eof process start code */
2485 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2486 av_log(avctx, AV_LOG_DEBUG,
2487 "marker parser used %d bytes (%d bits)\n",
2488 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2490 if (s->got_picture && s->cur_scan) {
2491 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2494 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2495 return AVERROR_INVALIDDATA;
2501 is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step > 1;
2503 if (AV_RB32(s->upscale_h)) {
2505 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2506 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2507 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2508 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2509 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2510 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2511 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2512 avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2513 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2514 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2515 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2516 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2518 ret = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2522 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2523 for (p = 0; p<s->nb_components; p++) {
2524 uint8_t *line = s->picture_ptr->data[p];
2527 if (!s->upscale_h[p])
2530 w = AV_CEIL_RSHIFT(w, hshift);
2531 h = AV_CEIL_RSHIFT(h, vshift);
2533 if (s->upscale_v[p])
2536 for (i = 0; i < h; i++) {
2537 if (s->upscale_h[p] == 1) {
2538 if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2539 else line[w - 1] = line[(w - 1) / 2];
2540 for (index = w - 2; index > 0; index--) {
2542 ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2544 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2546 } else if (s->upscale_h[p] == 2) {
2548 ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 3];
2550 ((uint16_t*)line)[w - 2] = ((uint16_t*)line)[w - 1];
2552 line[w - 1] = line[(w - 1) / 3];
2554 line[w - 2] = line[w - 1];
2556 for (index = w - 3; index > 0; index--) {
2557 line[index] = (line[index / 3] + line[(index + 1) / 3] + line[(index + 2) / 3] + 1) / 3;
2560 line += s->linesize[p];
2564 if (AV_RB32(s->upscale_v)) {
2566 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2567 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2568 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2569 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2570 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2571 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2572 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2573 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2574 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2575 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2576 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2577 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2578 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2580 ret = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2584 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2585 for (p = 0; p < s->nb_components; p++) {
2589 if (!s->upscale_v[p])
2592 w = AV_CEIL_RSHIFT(w, hshift);
2593 h = AV_CEIL_RSHIFT(h, vshift);
2595 dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2596 for (i = h - 1; i; i--) {
2597 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2598 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2599 if (src1 == src2 || i == h - 1) {
2600 memcpy(dst, src1, w);
2602 for (index = 0; index < w; index++)
2603 dst[index] = (src1[index] + src2[index]) >> 1;
2605 dst -= s->linesize[p];
2609 if (s->flipped && !s->rgb) {
2611 ret = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2615 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2616 for (index=0; index<s->nb_components; index++) {
2617 uint8_t *dst = s->picture_ptr->data[index];
2618 int w = s->picture_ptr->width;
2619 int h = s->picture_ptr->height;
2620 if(index && index<3){
2621 w = AV_CEIL_RSHIFT(w, hshift);
2622 h = AV_CEIL_RSHIFT(h, vshift);
2625 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2626 for (i=0; i<h/2; i++) {
2628 FFSWAP(int, dst[j], dst2[j]);
2629 dst += s->picture_ptr->linesize[index];
2630 dst2 -= s->picture_ptr->linesize[index];
2635 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2636 int w = s->picture_ptr->width;
2637 int h = s->picture_ptr->height;
2638 av_assert0(s->nb_components == 4);
2639 for (i=0; i<h; i++) {
2642 for (index=0; index<4; index++) {
2643 dst[index] = s->picture_ptr->data[index]
2644 + s->picture_ptr->linesize[index]*i;
2646 for (j=0; j<w; j++) {
2648 int r = dst[0][j] * k;
2649 int g = dst[1][j] * k;
2650 int b = dst[2][j] * k;
2651 dst[0][j] = g*257 >> 16;
2652 dst[1][j] = b*257 >> 16;
2653 dst[2][j] = r*257 >> 16;
2658 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2659 int w = s->picture_ptr->width;
2660 int h = s->picture_ptr->height;
2661 av_assert0(s->nb_components == 4);
2662 for (i=0; i<h; i++) {
2665 for (index=0; index<4; index++) {
2666 dst[index] = s->picture_ptr->data[index]
2667 + s->picture_ptr->linesize[index]*i;
2669 for (j=0; j<w; j++) {
2671 int r = (255 - dst[0][j]) * k;
2672 int g = (128 - dst[1][j]) * k;
2673 int b = (128 - dst[2][j]) * k;
2674 dst[0][j] = r*257 >> 16;
2675 dst[1][j] = (g*257 >> 16) + 128;
2676 dst[2][j] = (b*257 >> 16) + 128;
2683 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2685 stereo->type = s->stereo3d->type;
2686 stereo->flags = s->stereo3d->flags;
2688 av_freep(&s->stereo3d);
2691 if (s->iccnum != 0 && s->iccnum == s->iccread) {
2692 AVFrameSideData *sd;
2697 /* Sum size of all parts. */
2698 for (i = 0; i < s->iccnum; i++)
2699 total_size += s->iccdatalens[i];
2701 sd = av_frame_new_side_data(data, AV_FRAME_DATA_ICC_PROFILE, total_size);
2703 av_log(s->avctx, AV_LOG_ERROR, "Could not allocate frame side data\n");
2704 return AVERROR(ENOMEM);
2707 /* Reassemble the parts, which are now in-order. */
2708 for (i = 0; i < s->iccnum; i++) {
2709 memcpy(sd->data + offset, s->iccdata[i], s->iccdatalens[i]);
2710 offset += s->iccdatalens[i];
2714 av_dict_copy(&((AVFrame *) data)->metadata, s->exif_metadata, 0);
2715 av_dict_free(&s->exif_metadata);
2718 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2720 // return buf_end - buf_ptr;
2721 return buf_ptr - buf;
2724 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2726 MJpegDecodeContext *s = avctx->priv_data;
2729 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2730 av_log(avctx, AV_LOG_INFO, "Single field\n");
2734 av_frame_free(&s->picture);
2735 s->picture_ptr = NULL;
2736 } else if (s->picture_ptr)
2737 av_frame_unref(s->picture_ptr);
2739 av_freep(&s->buffer);
2740 av_freep(&s->stereo3d);
2741 av_freep(&s->ljpeg_buffer);
2742 s->ljpeg_buffer_size = 0;
2744 for (i = 0; i < 3; i++) {
2745 for (j = 0; j < 4; j++)
2746 ff_free_vlc(&s->vlcs[i][j]);
2748 for (i = 0; i < MAX_COMPONENTS; i++) {
2749 av_freep(&s->blocks[i]);
2750 av_freep(&s->last_nnz[i]);
2752 av_dict_free(&s->exif_metadata);
2754 reset_icc_profile(s);
2756 av_freep(&s->hwaccel_picture_private);
2761 static void decode_flush(AVCodecContext *avctx)
2763 MJpegDecodeContext *s = avctx->priv_data;
2767 #if CONFIG_MJPEG_DECODER
2768 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2769 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2770 static const AVOption options[] = {
2771 { "extern_huff", "Use external huffman table.",
2772 OFFSET(extern_huff), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
2776 static const AVClass mjpegdec_class = {
2777 .class_name = "MJPEG decoder",
2778 .item_name = av_default_item_name,
2780 .version = LIBAVUTIL_VERSION_INT,
2783 AVCodec ff_mjpeg_decoder = {
2785 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2786 .type = AVMEDIA_TYPE_VIDEO,
2787 .id = AV_CODEC_ID_MJPEG,
2788 .priv_data_size = sizeof(MJpegDecodeContext),
2789 .init = ff_mjpeg_decode_init,
2790 .close = ff_mjpeg_decode_end,
2791 .decode = ff_mjpeg_decode_frame,
2792 .flush = decode_flush,
2793 .capabilities = AV_CODEC_CAP_DR1,
2795 .priv_class = &mjpegdec_class,
2796 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
2797 FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2798 .hw_configs = (const AVCodecHWConfigInternal*[]) {
2799 #if CONFIG_MJPEG_NVDEC_HWACCEL
2800 HWACCEL_NVDEC(mjpeg),
2802 #if CONFIG_MJPEG_VAAPI_HWACCEL
2803 HWACCEL_VAAPI(mjpeg),
2809 #if CONFIG_THP_DECODER
2810 AVCodec ff_thp_decoder = {
2812 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2813 .type = AVMEDIA_TYPE_VIDEO,
2814 .id = AV_CODEC_ID_THP,
2815 .priv_data_size = sizeof(MJpegDecodeContext),
2816 .init = ff_mjpeg_decode_init,
2817 .close = ff_mjpeg_decode_end,
2818 .decode = ff_mjpeg_decode_frame,
2819 .flush = decode_flush,
2820 .capabilities = AV_CODEC_CAP_DR1,
2822 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,