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;
630 memset(s->upscale_h, 0, sizeof(s->upscale_h));
631 memset(s->upscale_v, 0, sizeof(s->upscale_v));
632 if (s->nb_components == 3) {
633 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
634 } else if (s->nb_components != 1) {
635 av_log(s->avctx, AV_LOG_ERROR, "Unsupported number of components %d\n", s->nb_components);
636 return AVERROR_PATCHWELCOME;
637 } else if (s->palette_index && s->bits <= 8)
638 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
639 else if (s->bits <= 8)
640 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
642 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
645 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
647 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
651 if (s->avctx->pix_fmt == s->hwaccel_sw_pix_fmt && !size_change) {
652 s->avctx->pix_fmt = s->hwaccel_pix_fmt;
654 enum AVPixelFormat pix_fmts[] = {
655 #if CONFIG_MJPEG_NVDEC_HWACCEL
658 #if CONFIG_MJPEG_VAAPI_HWACCEL
664 s->hwaccel_pix_fmt = ff_get_format(s->avctx, pix_fmts);
665 if (s->hwaccel_pix_fmt < 0)
666 return AVERROR(EINVAL);
668 s->hwaccel_sw_pix_fmt = s->avctx->pix_fmt;
669 s->avctx->pix_fmt = s->hwaccel_pix_fmt;
672 if (s->avctx->skip_frame == AVDISCARD_ALL) {
673 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
674 s->picture_ptr->key_frame = 1;
679 av_frame_unref(s->picture_ptr);
680 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
682 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
683 s->picture_ptr->key_frame = 1;
686 for (i = 0; i < 4; i++)
687 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
689 ff_dlog(s->avctx, "%d %d %d %d %d %d\n",
690 s->width, s->height, s->linesize[0], s->linesize[1],
691 s->interlaced, s->avctx->height);
693 if (len != (8 + (3 * nb_components)))
694 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
697 if ((s->rgb && !s->lossless && !s->ls) ||
698 (!s->rgb && s->ls && s->nb_components > 1)) {
699 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
700 return AVERROR_PATCHWELCOME;
703 /* totally blank picture as progressive JPEG will only add details to it */
704 if (s->progressive) {
705 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
706 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
707 for (i = 0; i < s->nb_components; i++) {
708 int size = bw * bh * s->h_count[i] * s->v_count[i];
709 av_freep(&s->blocks[i]);
710 av_freep(&s->last_nnz[i]);
711 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
712 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
713 if (!s->blocks[i] || !s->last_nnz[i])
714 return AVERROR(ENOMEM);
715 s->block_stride[i] = bw * s->h_count[i];
717 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
720 if (s->avctx->hwaccel) {
721 s->hwaccel_picture_private =
722 av_mallocz(s->avctx->hwaccel->frame_priv_data_size);
723 if (!s->hwaccel_picture_private)
724 return AVERROR(ENOMEM);
726 ret = s->avctx->hwaccel->start_frame(s->avctx, s->raw_image_buffer,
727 s->raw_image_buffer_size);
735 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
738 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
739 if (code < 0 || code > 16) {
740 av_log(s->avctx, AV_LOG_WARNING,
741 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
742 0, dc_index, &s->vlcs[0][dc_index]);
747 return get_xbits(&s->gb, code);
752 /* decode block and dequantize */
753 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
754 int dc_index, int ac_index, uint16_t *quant_matrix)
756 int code, i, j, level, val;
759 val = mjpeg_decode_dc(s, dc_index);
760 if (val == 0xfffff) {
761 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
762 return AVERROR_INVALIDDATA;
764 val = val * (unsigned)quant_matrix[0] + s->last_dc[component];
765 val = av_clip_int16(val);
766 s->last_dc[component] = val;
770 {OPEN_READER(re, &s->gb);
772 UPDATE_CACHE(re, &s->gb);
773 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
775 i += ((unsigned)code) >> 4;
778 if (code > MIN_CACHE_BITS - 16)
779 UPDATE_CACHE(re, &s->gb);
782 int cache = GET_CACHE(re, &s->gb);
783 int sign = (~cache) >> 31;
784 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
787 LAST_SKIP_BITS(re, &s->gb, code);
790 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
791 return AVERROR_INVALIDDATA;
793 j = s->scantable.permutated[i];
794 block[j] = level * quant_matrix[i];
797 CLOSE_READER(re, &s->gb);}
802 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
803 int component, int dc_index,
804 uint16_t *quant_matrix, int Al)
807 s->bdsp.clear_block(block);
808 val = mjpeg_decode_dc(s, dc_index);
809 if (val == 0xfffff) {
810 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
811 return AVERROR_INVALIDDATA;
813 val = (val * (quant_matrix[0] << Al)) + s->last_dc[component];
814 s->last_dc[component] = val;
819 /* decode block and dequantize - progressive JPEG version */
820 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
821 uint8_t *last_nnz, int ac_index,
822 uint16_t *quant_matrix,
823 int ss, int se, int Al, int *EOBRUN)
825 int code, i, j, val, run;
834 OPEN_READER(re, &s->gb);
835 for (i = ss; ; i++) {
836 UPDATE_CACHE(re, &s->gb);
837 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
839 run = ((unsigned) code) >> 4;
843 if (code > MIN_CACHE_BITS - 16)
844 UPDATE_CACHE(re, &s->gb);
847 int cache = GET_CACHE(re, &s->gb);
848 int sign = (~cache) >> 31;
849 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
852 LAST_SKIP_BITS(re, &s->gb, code);
856 j = s->scantable.permutated[se];
857 block[j] = level * (quant_matrix[se] << Al);
860 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
861 return AVERROR_INVALIDDATA;
863 j = s->scantable.permutated[i];
864 block[j] = level * (quant_matrix[i] << Al);
866 if (run == 0xF) {// ZRL - skip 15 coefficients
869 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
870 return AVERROR_INVALIDDATA;
875 UPDATE_CACHE(re, &s->gb);
876 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
877 LAST_SKIP_BITS(re, &s->gb, run);
884 CLOSE_READER(re, &s->gb);
893 #define REFINE_BIT(j) { \
894 UPDATE_CACHE(re, &s->gb); \
895 sign = block[j] >> 15; \
896 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
897 ((quant_matrix[i] ^ sign) - sign) << Al; \
898 LAST_SKIP_BITS(re, &s->gb, 1); \
906 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
911 j = s->scantable.permutated[i]; \
914 else if (run-- == 0) \
918 /* decode block and dequantize - progressive JPEG refinement pass */
919 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
921 int ac_index, uint16_t *quant_matrix,
922 int ss, int se, int Al, int *EOBRUN)
924 int code, i = ss, j, sign, val, run;
925 int last = FFMIN(se, *last_nnz);
927 OPEN_READER(re, &s->gb);
932 UPDATE_CACHE(re, &s->gb);
933 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
936 run = ((unsigned) code) >> 4;
937 UPDATE_CACHE(re, &s->gb);
938 val = SHOW_UBITS(re, &s->gb, 1);
939 LAST_SKIP_BITS(re, &s->gb, 1);
941 j = s->scantable.permutated[i];
943 block[j] = ((quant_matrix[i] << Al) ^ val) - val;
947 CLOSE_READER(re, &s->gb);
951 run = ((unsigned) code) >> 4;
958 UPDATE_CACHE(re, &s->gb);
959 run += SHOW_UBITS(re, &s->gb, val);
960 LAST_SKIP_BITS(re, &s->gb, val);
972 for (; i <= last; i++) {
973 j = s->scantable.permutated[i];
977 CLOSE_READER(re, &s->gb);
984 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
989 if (s->restart_interval) {
991 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
992 align_get_bits(&s->gb);
993 for (i = 0; i < nb_components; i++) /* reset dc */
994 s->last_dc[i] = (4 << s->bits);
997 i = 8 + ((-get_bits_count(&s->gb)) & 7);
999 if (s->restart_count == 0) {
1000 if( show_bits(&s->gb, i) == (1 << i) - 1
1001 || show_bits(&s->gb, i) == 0xFF) {
1002 int pos = get_bits_count(&s->gb);
1003 align_get_bits(&s->gb);
1004 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
1005 skip_bits(&s->gb, 8);
1006 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
1007 for (i = 0; i < nb_components; i++) /* reset dc */
1008 s->last_dc[i] = (4 << s->bits);
1011 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
1018 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
1021 uint16_t (*buffer)[4];
1022 int left[4], top[4], topleft[4];
1023 const int linesize = s->linesize[0];
1024 const int mask = ((1 << s->bits) - 1) << point_transform;
1025 int resync_mb_y = 0;
1026 int resync_mb_x = 0;
1028 if (s->nb_components != 3 && s->nb_components != 4)
1029 return AVERROR_INVALIDDATA;
1030 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
1031 return AVERROR_INVALIDDATA;
1034 s->restart_count = s->restart_interval;
1036 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
1037 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
1038 if (!s->ljpeg_buffer)
1039 return AVERROR(ENOMEM);
1041 buffer = s->ljpeg_buffer;
1043 for (i = 0; i < 4; i++)
1044 buffer[0][i] = 1 << (s->bits - 1);
1046 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1047 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
1049 if (s->interlaced && s->bottom_field)
1050 ptr += linesize >> 1;
1052 for (i = 0; i < 4; i++)
1053 top[i] = left[i] = topleft[i] = buffer[0][i];
1055 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1056 int modified_predictor = predictor;
1058 if (s->restart_interval && !s->restart_count){
1059 s->restart_count = s->restart_interval;
1063 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
1065 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
1066 modified_predictor = 1;
1068 for (i=0;i<nb_components;i++) {
1071 topleft[i] = top[i];
1072 top[i] = buffer[mb_x][i];
1074 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
1076 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1080 left[i] = buffer[mb_x][i] =
1081 mask & (pred + (dc * (1 << point_transform)));
1084 if (s->restart_interval && !--s->restart_count) {
1085 align_get_bits(&s->gb);
1086 skip_bits(&s->gb, 16); /* skip RSTn */
1089 if (s->rct && s->nb_components == 4) {
1090 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1091 ptr[4*mb_x + 2] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1092 ptr[4*mb_x + 1] = buffer[mb_x][1] + ptr[4*mb_x + 2];
1093 ptr[4*mb_x + 3] = buffer[mb_x][2] + ptr[4*mb_x + 2];
1094 ptr[4*mb_x + 0] = buffer[mb_x][3];
1096 } else if (s->nb_components == 4) {
1097 for(i=0; i<nb_components; i++) {
1098 int c= s->comp_index[i];
1100 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1101 ptr[4*mb_x+3-c] = buffer[mb_x][i];
1103 } else if(s->bits == 9) {
1104 return AVERROR_PATCHWELCOME;
1106 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1107 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
1111 } else if (s->rct) {
1112 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1113 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1114 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1115 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1117 } else if (s->pegasus_rct) {
1118 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1119 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
1120 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1121 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1124 for(i=0; i<nb_components; i++) {
1125 int c= s->comp_index[i];
1127 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1128 ptr[3*mb_x+2-c] = buffer[mb_x][i];
1130 } else if(s->bits == 9) {
1131 return AVERROR_PATCHWELCOME;
1133 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1134 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
1143 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1144 int point_transform, int nb_components)
1146 int i, mb_x, mb_y, mask;
1147 int bits= (s->bits+7)&~7;
1148 int resync_mb_y = 0;
1149 int resync_mb_x = 0;
1151 point_transform += bits - s->bits;
1152 mask = ((1 << s->bits) - 1) << point_transform;
1154 av_assert0(nb_components>=1 && nb_components<=4);
1156 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1157 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1158 if (get_bits_left(&s->gb) < 1) {
1159 av_log(s->avctx, AV_LOG_ERROR, "bitstream end in yuv_scan\n");
1160 return AVERROR_INVALIDDATA;
1162 if (s->restart_interval && !s->restart_count){
1163 s->restart_count = s->restart_interval;
1168 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1169 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1170 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1171 for (i = 0; i < nb_components; i++) {
1174 int n, h, v, x, y, c, j, linesize;
1175 n = s->nb_blocks[i];
1176 c = s->comp_index[i];
1181 linesize= s->linesize[c];
1183 if(bits>8) linesize /= 2;
1185 for(j=0; j<n; j++) {
1188 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1191 if ( h * mb_x + x >= s->width
1192 || v * mb_y + y >= s->height) {
1194 } else if (bits<=8) {
1195 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1197 if(x==0 && leftcol){
1198 pred= 1 << (bits - 1);
1203 if(x==0 && leftcol){
1204 pred= ptr[-linesize];
1206 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1210 if (s->interlaced && s->bottom_field)
1211 ptr += linesize >> 1;
1213 *ptr= pred + ((unsigned)dc << point_transform);
1215 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1217 if(x==0 && leftcol){
1218 pred= 1 << (bits - 1);
1223 if(x==0 && leftcol){
1224 pred= ptr16[-linesize];
1226 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1230 if (s->interlaced && s->bottom_field)
1231 ptr16 += linesize >> 1;
1233 *ptr16= pred + ((unsigned)dc << point_transform);
1242 for (i = 0; i < nb_components; i++) {
1245 int n, h, v, x, y, c, j, linesize, dc;
1246 n = s->nb_blocks[i];
1247 c = s->comp_index[i];
1252 linesize = s->linesize[c];
1254 if(bits>8) linesize /= 2;
1256 for (j = 0; j < n; j++) {
1259 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1262 if ( h * mb_x + x >= s->width
1263 || v * mb_y + y >= s->height) {
1265 } else if (bits<=8) {
1266 ptr = s->picture_ptr->data[c] +
1267 (linesize * (v * mb_y + y)) +
1268 (h * mb_x + x); //FIXME optimize this crap
1269 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1272 *ptr = pred + ((unsigned)dc << point_transform);
1274 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1275 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1278 *ptr16= pred + ((unsigned)dc << point_transform);
1288 if (s->restart_interval && !--s->restart_count) {
1289 align_get_bits(&s->gb);
1290 skip_bits(&s->gb, 16); /* skip RSTn */
1297 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1298 uint8_t *dst, const uint8_t *src,
1299 int linesize, int lowres)
1302 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1304 case 1: copy_block4(dst, src, linesize, linesize, 4);
1306 case 2: copy_block2(dst, src, linesize, linesize, 2);
1308 case 3: *dst = *src;
1313 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1315 int block_x, block_y;
1316 int size = 8 >> s->avctx->lowres;
1318 for (block_y=0; block_y<size; block_y++)
1319 for (block_x=0; block_x<size; block_x++)
1320 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1322 for (block_y=0; block_y<size; block_y++)
1323 for (block_x=0; block_x<size; block_x++)
1324 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1328 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1329 int Al, const uint8_t *mb_bitmask,
1330 int mb_bitmask_size,
1331 const AVFrame *reference)
1333 int i, mb_x, mb_y, chroma_h_shift, chroma_v_shift, chroma_width, chroma_height;
1334 uint8_t *data[MAX_COMPONENTS];
1335 const uint8_t *reference_data[MAX_COMPONENTS];
1336 int linesize[MAX_COMPONENTS];
1337 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1338 int bytes_per_pixel = 1 + (s->bits > 8);
1341 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1342 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1343 return AVERROR_INVALIDDATA;
1345 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1348 s->restart_count = 0;
1350 av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &chroma_h_shift,
1352 chroma_width = AV_CEIL_RSHIFT(s->width, chroma_h_shift);
1353 chroma_height = AV_CEIL_RSHIFT(s->height, chroma_v_shift);
1355 for (i = 0; i < nb_components; i++) {
1356 int c = s->comp_index[i];
1357 data[c] = s->picture_ptr->data[c];
1358 reference_data[c] = reference ? reference->data[c] : NULL;
1359 linesize[c] = s->linesize[c];
1360 s->coefs_finished[c] |= 1;
1363 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1364 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1365 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1367 if (s->restart_interval && !s->restart_count)
1368 s->restart_count = s->restart_interval;
1370 if (get_bits_left(&s->gb) < 0) {
1371 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1372 -get_bits_left(&s->gb));
1373 return AVERROR_INVALIDDATA;
1375 for (i = 0; i < nb_components; i++) {
1377 int n, h, v, x, y, c, j;
1379 n = s->nb_blocks[i];
1380 c = s->comp_index[i];
1385 for (j = 0; j < n; j++) {
1386 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1387 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1389 if (s->interlaced && s->bottom_field)
1390 block_offset += linesize[c] >> 1;
1391 if ( 8*(h * mb_x + x) < ((c == 1) || (c == 2) ? chroma_width : s->width)
1392 && 8*(v * mb_y + y) < ((c == 1) || (c == 2) ? chroma_height : s->height)) {
1393 ptr = data[c] + block_offset;
1396 if (!s->progressive) {
1399 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1400 linesize[c], s->avctx->lowres);
1403 s->bdsp.clear_block(s->block);
1404 if (decode_block(s, s->block, i,
1405 s->dc_index[i], s->ac_index[i],
1406 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1407 av_log(s->avctx, AV_LOG_ERROR,
1408 "error y=%d x=%d\n", mb_y, mb_x);
1409 return AVERROR_INVALIDDATA;
1412 s->idsp.idct_put(ptr, linesize[c], s->block);
1414 shift_output(s, ptr, linesize[c]);
1418 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1420 int16_t *block = s->blocks[c][block_idx];
1422 block[0] += get_bits1(&s->gb) *
1423 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1424 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1425 s->quant_matrixes[s->quant_sindex[i]],
1427 av_log(s->avctx, AV_LOG_ERROR,
1428 "error y=%d x=%d\n", mb_y, mb_x);
1429 return AVERROR_INVALIDDATA;
1432 ff_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1433 ff_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1434 mb_x, mb_y, x, y, c, s->bottom_field,
1435 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1443 handle_rstn(s, nb_components);
1449 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1450 int se, int Ah, int Al)
1454 int c = s->comp_index[0];
1455 uint16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1457 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1458 if (se < ss || se > 63) {
1459 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1460 return AVERROR_INVALIDDATA;
1463 // s->coefs_finished is a bitmask for coefficients coded
1464 // ss and se are parameters telling start and end coefficients
1465 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1467 s->restart_count = 0;
1469 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1470 int block_idx = mb_y * s->block_stride[c];
1471 int16_t (*block)[64] = &s->blocks[c][block_idx];
1472 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1473 if (get_bits_left(&s->gb) <= 0) {
1474 av_log(s->avctx, AV_LOG_ERROR, "bitstream truncated in mjpeg_decode_scan_progressive_ac\n");
1475 return AVERROR_INVALIDDATA;
1477 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1479 if (s->restart_interval && !s->restart_count)
1480 s->restart_count = s->restart_interval;
1483 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1484 quant_matrix, ss, se, Al, &EOBRUN);
1486 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1487 quant_matrix, ss, se, Al, &EOBRUN);
1489 av_log(s->avctx, AV_LOG_ERROR,
1490 "error y=%d x=%d\n", mb_y, mb_x);
1491 return AVERROR_INVALIDDATA;
1494 if (handle_rstn(s, 0))
1501 static void mjpeg_idct_scan_progressive_ac(MJpegDecodeContext *s)
1505 const int bytes_per_pixel = 1 + (s->bits > 8);
1506 const int block_size = s->lossless ? 1 : 8;
1508 for (c = 0; c < s->nb_components; c++) {
1509 uint8_t *data = s->picture_ptr->data[c];
1510 int linesize = s->linesize[c];
1511 int h = s->h_max / s->h_count[c];
1512 int v = s->v_max / s->v_count[c];
1513 int mb_width = (s->width + h * block_size - 1) / (h * block_size);
1514 int mb_height = (s->height + v * block_size - 1) / (v * block_size);
1516 if (~s->coefs_finished[c])
1517 av_log(s->avctx, AV_LOG_WARNING, "component %d is incomplete\n", c);
1519 if (s->interlaced && s->bottom_field)
1520 data += linesize >> 1;
1522 for (mb_y = 0; mb_y < mb_height; mb_y++) {
1523 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1524 int block_idx = mb_y * s->block_stride[c];
1525 int16_t (*block)[64] = &s->blocks[c][block_idx];
1526 for (mb_x = 0; mb_x < mb_width; mb_x++, block++) {
1527 s->idsp.idct_put(ptr, linesize, *block);
1529 shift_output(s, ptr, linesize);
1530 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1536 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1537 int mb_bitmask_size, const AVFrame *reference)
1539 int len, nb_components, i, h, v, predictor, point_transform;
1541 const int block_size = s->lossless ? 1 : 8;
1542 int ilv, prev_shift;
1544 if (!s->got_picture) {
1545 av_log(s->avctx, AV_LOG_WARNING,
1546 "Can not process SOS before SOF, skipping\n");
1551 if (reference->width != s->picture_ptr->width ||
1552 reference->height != s->picture_ptr->height ||
1553 reference->format != s->picture_ptr->format) {
1554 av_log(s->avctx, AV_LOG_ERROR, "Reference mismatching\n");
1555 return AVERROR_INVALIDDATA;
1559 /* XXX: verify len field validity */
1560 len = get_bits(&s->gb, 16);
1561 nb_components = get_bits(&s->gb, 8);
1562 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1563 avpriv_report_missing_feature(s->avctx,
1564 "decode_sos: nb_components (%d)",
1566 return AVERROR_PATCHWELCOME;
1568 if (len != 6 + 2 * nb_components) {
1569 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1570 return AVERROR_INVALIDDATA;
1572 for (i = 0; i < nb_components; i++) {
1573 id = get_bits(&s->gb, 8) - 1;
1574 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1575 /* find component index */
1576 for (index = 0; index < s->nb_components; index++)
1577 if (id == s->component_id[index])
1579 if (index == s->nb_components) {
1580 av_log(s->avctx, AV_LOG_ERROR,
1581 "decode_sos: index(%d) out of components\n", index);
1582 return AVERROR_INVALIDDATA;
1584 /* Metasoft MJPEG codec has Cb and Cr swapped */
1585 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1586 && nb_components == 3 && s->nb_components == 3 && i)
1589 s->quant_sindex[i] = s->quant_index[index];
1590 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1591 s->h_scount[i] = s->h_count[index];
1592 s->v_scount[i] = s->v_count[index];
1594 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1596 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1597 index = (index+2)%3;
1599 s->comp_index[i] = index;
1601 s->dc_index[i] = get_bits(&s->gb, 4);
1602 s->ac_index[i] = get_bits(&s->gb, 4);
1604 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1605 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1607 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))
1611 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1612 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1613 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1614 prev_shift = get_bits(&s->gb, 4); /* Ah */
1615 point_transform = get_bits(&s->gb, 4); /* Al */
1617 prev_shift = point_transform = 0;
1619 if (nb_components > 1) {
1620 /* interleaved stream */
1621 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1622 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1623 } else if (!s->ls) { /* skip this for JPEG-LS */
1624 h = s->h_max / s->h_scount[0];
1625 v = s->v_max / s->v_scount[0];
1626 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1627 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1628 s->nb_blocks[0] = 1;
1633 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1634 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1635 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1636 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1637 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1640 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1641 for (i = s->mjpb_skiptosod; i > 0; i--)
1642 skip_bits(&s->gb, 8);
1645 for (i = 0; i < nb_components; i++)
1646 s->last_dc[i] = (4 << s->bits);
1648 if (s->avctx->hwaccel) {
1649 int bytes_to_start = get_bits_count(&s->gb) / 8;
1650 av_assert0(bytes_to_start >= 0 &&
1651 s->raw_scan_buffer_size >= bytes_to_start);
1653 ret = s->avctx->hwaccel->decode_slice(s->avctx,
1654 s->raw_scan_buffer + bytes_to_start,
1655 s->raw_scan_buffer_size - bytes_to_start);
1659 } else if (s->lossless) {
1660 av_assert0(s->picture_ptr == s->picture);
1661 if (CONFIG_JPEGLS_DECODER && s->ls) {
1663 // reset_ls_coding_parameters(s, 0);
1665 if ((ret = ff_jpegls_decode_picture(s, predictor,
1666 point_transform, ilv)) < 0)
1670 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1673 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1675 nb_components)) < 0)
1680 if (s->progressive && predictor) {
1681 av_assert0(s->picture_ptr == s->picture);
1682 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1684 point_transform)) < 0)
1687 if ((ret = mjpeg_decode_scan(s, nb_components,
1688 prev_shift, point_transform,
1689 mb_bitmask, mb_bitmask_size, reference)) < 0)
1694 if (s->interlaced &&
1695 get_bits_left(&s->gb) > 32 &&
1696 show_bits(&s->gb, 8) == 0xFF) {
1697 GetBitContext bak = s->gb;
1698 align_get_bits(&bak);
1699 if (show_bits(&bak, 16) == 0xFFD1) {
1700 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1702 skip_bits(&s->gb, 16);
1703 s->bottom_field ^= 1;
1712 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1713 return AVERROR_INVALIDDATA;
1716 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1718 if (get_bits(&s->gb, 16) != 4)
1719 return AVERROR_INVALIDDATA;
1720 s->restart_interval = get_bits(&s->gb, 16);
1721 s->restart_count = 0;
1722 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1723 s->restart_interval);
1728 static int mjpeg_decode_app(MJpegDecodeContext *s)
1732 len = get_bits(&s->gb, 16);
1734 return AVERROR_INVALIDDATA;
1735 if (8 * len > get_bits_left(&s->gb))
1736 return AVERROR_INVALIDDATA;
1738 id = get_bits_long(&s->gb, 32);
1741 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1742 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n",
1743 av_fourcc2str(av_bswap32(id)), id, len);
1745 /* Buggy AVID, it puts EOI only at every 10th frame. */
1746 /* Also, this fourcc is used by non-avid files too, it holds some
1747 information, but it's always present in AVID-created files. */
1748 if (id == AV_RB32("AVI1")) {
1754 4bytes field_size_less_padding
1757 i = get_bits(&s->gb, 8); len--;
1758 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1762 if (id == AV_RB32("JFIF")) {
1763 int t_w, t_h, v1, v2;
1766 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1767 v1 = get_bits(&s->gb, 8);
1768 v2 = get_bits(&s->gb, 8);
1769 skip_bits(&s->gb, 8);
1771 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1772 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1773 if ( s->avctx->sample_aspect_ratio.num <= 0
1774 || s->avctx->sample_aspect_ratio.den <= 0) {
1775 s->avctx->sample_aspect_ratio.num = 0;
1776 s->avctx->sample_aspect_ratio.den = 1;
1779 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1780 av_log(s->avctx, AV_LOG_INFO,
1781 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1783 s->avctx->sample_aspect_ratio.num,
1784 s->avctx->sample_aspect_ratio.den);
1788 t_w = get_bits(&s->gb, 8);
1789 t_h = get_bits(&s->gb, 8);
1791 /* skip thumbnail */
1792 if (len -10 - (t_w * t_h * 3) > 0)
1793 len -= t_w * t_h * 3;
1800 if ( id == AV_RB32("Adob")
1802 && show_bits(&s->gb, 8) == 'e'
1803 && show_bits_long(&s->gb, 32) != AV_RB32("e_CM")) {
1804 skip_bits(&s->gb, 8); /* 'e' */
1805 skip_bits(&s->gb, 16); /* version */
1806 skip_bits(&s->gb, 16); /* flags0 */
1807 skip_bits(&s->gb, 16); /* flags1 */
1808 s->adobe_transform = get_bits(&s->gb, 8);
1809 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1810 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1815 if (id == AV_RB32("LJIF")) {
1817 int pegasus_rct = s->pegasus_rct;
1818 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1819 av_log(s->avctx, AV_LOG_INFO,
1820 "Pegasus lossless jpeg header found\n");
1821 skip_bits(&s->gb, 16); /* version ? */
1822 skip_bits(&s->gb, 16); /* unknown always 0? */
1823 skip_bits(&s->gb, 16); /* unknown always 0? */
1824 skip_bits(&s->gb, 16); /* unknown always 0? */
1825 switch (i=get_bits(&s->gb, 8)) {
1835 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1840 if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
1841 av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
1846 s->pegasus_rct = pegasus_rct;
1850 if (id == AV_RL32("colr") && len > 0) {
1851 s->colr = get_bits(&s->gb, 8);
1852 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1853 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1857 if (id == AV_RL32("xfrm") && len > 0) {
1858 s->xfrm = get_bits(&s->gb, 8);
1859 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1860 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1865 /* JPS extension by VRex */
1866 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1867 int flags, layout, type;
1868 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1869 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1871 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1872 skip_bits(&s->gb, 16); len -= 2; /* block length */
1873 skip_bits(&s->gb, 8); /* reserved */
1874 flags = get_bits(&s->gb, 8);
1875 layout = get_bits(&s->gb, 8);
1876 type = get_bits(&s->gb, 8);
1879 s->stereo3d = av_stereo3d_alloc();
1884 s->stereo3d->type = AV_STEREO3D_2D;
1885 } else if (type == 1) {
1888 s->stereo3d->type = AV_STEREO3D_LINES;
1891 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1894 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1897 if (!(flags & 0x04)) {
1898 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1905 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1906 GetByteContext gbytes;
1907 int ret, le, ifd_offset, bytes_read;
1908 const uint8_t *aligned;
1910 skip_bits(&s->gb, 16); // skip padding
1913 // init byte wise reading
1914 aligned = align_get_bits(&s->gb);
1915 bytestream2_init(&gbytes, aligned, len);
1918 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1920 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1922 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1924 // read 0th IFD and store the metadata
1925 // (return values > 0 indicate the presence of subimage metadata)
1926 ret = ff_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1928 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1932 bytes_read = bytestream2_tell(&gbytes);
1933 skip_bits(&s->gb, bytes_read << 3);
1940 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1941 id = get_bits_long(&s->gb, 32);
1944 if (id == AV_RB32("mjpg")) {
1947 4bytes pad field size
1955 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1956 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1960 if (s->start_code == APP2 && id == AV_RB32("ICC_") && len >= 10) {
1963 unsigned nummarkers;
1965 id = get_bits_long(&s->gb, 32);
1966 id2 = get_bits_long(&s->gb, 24);
1968 if (id != AV_RB32("PROF") || id2 != AV_RB24("ILE")) {
1969 av_log(s->avctx, AV_LOG_WARNING, "Invalid ICC_PROFILE header in APP2\n");
1973 skip_bits(&s->gb, 8);
1974 seqno = get_bits(&s->gb, 8);
1977 av_log(s->avctx, AV_LOG_WARNING, "Invalid sequence number in APP2\n");
1981 nummarkers = get_bits(&s->gb, 8);
1983 if (nummarkers == 0) {
1984 av_log(s->avctx, AV_LOG_WARNING, "Invalid number of markers coded in APP2\n");
1986 } else if (s->iccnum != 0 && nummarkers != s->iccnum) {
1987 av_log(s->avctx, AV_LOG_WARNING, "Mistmatch in coded number of ICC markers between markers\n");
1989 } else if (seqno > nummarkers) {
1990 av_log(s->avctx, AV_LOG_WARNING, "Mismatching sequence number and coded number of ICC markers\n");
1994 /* Allocate if this is the first APP2 we've seen. */
1995 if (s->iccnum == 0) {
1996 s->iccdata = av_mallocz(nummarkers * sizeof(*(s->iccdata)));
1997 s->iccdatalens = av_mallocz(nummarkers * sizeof(*(s->iccdatalens)));
1998 if (!s->iccdata || !s->iccdatalens) {
1999 av_log(s->avctx, AV_LOG_ERROR, "Could not allocate ICC data arrays\n");
2000 return AVERROR(ENOMEM);
2002 s->iccnum = nummarkers;
2005 if (s->iccdata[seqno - 1]) {
2006 av_log(s->avctx, AV_LOG_WARNING, "Duplicate ICC sequence number\n");
2010 s->iccdatalens[seqno - 1] = len;
2011 s->iccdata[seqno - 1] = av_malloc(len);
2012 if (!s->iccdata[seqno - 1]) {
2013 av_log(s->avctx, AV_LOG_ERROR, "Could not allocate ICC data buffer\n");
2014 return AVERROR(ENOMEM);
2017 memcpy(s->iccdata[seqno - 1], align_get_bits(&s->gb), len);
2018 skip_bits(&s->gb, len << 3);
2022 if (s->iccread > s->iccnum)
2023 av_log(s->avctx, AV_LOG_WARNING, "Read more ICC markers than are supposed to be coded\n");
2027 /* slow but needed for extreme adobe jpegs */
2029 av_log(s->avctx, AV_LOG_ERROR,
2030 "mjpeg: error, decode_app parser read over the end\n");
2032 skip_bits(&s->gb, 8);
2037 static int mjpeg_decode_com(MJpegDecodeContext *s)
2039 int len = get_bits(&s->gb, 16);
2040 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
2042 char *cbuf = av_malloc(len - 1);
2044 return AVERROR(ENOMEM);
2046 for (i = 0; i < len - 2; i++)
2047 cbuf[i] = get_bits(&s->gb, 8);
2048 if (i > 0 && cbuf[i - 1] == '\n')
2053 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2054 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
2056 /* buggy avid, it puts EOI only at every 10th frame */
2057 if (!strncmp(cbuf, "AVID", 4)) {
2058 parse_avid(s, cbuf, len);
2059 } else if (!strcmp(cbuf, "CS=ITU601"))
2061 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
2062 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
2064 else if (!strcmp(cbuf, "MULTISCOPE II")) {
2065 s->avctx->sample_aspect_ratio = (AVRational) { 1, 2 };
2075 /* return the 8 bit start code value and update the search
2076 state. Return -1 if no start code found */
2077 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
2079 const uint8_t *buf_ptr;
2084 buf_ptr = *pbuf_ptr;
2085 while (buf_end - buf_ptr > 1) {
2088 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
2097 ff_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
2098 *pbuf_ptr = buf_ptr;
2102 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
2103 const uint8_t **buf_ptr, const uint8_t *buf_end,
2104 const uint8_t **unescaped_buf_ptr,
2105 int *unescaped_buf_size)
2108 start_code = find_marker(buf_ptr, buf_end);
2110 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
2112 return AVERROR(ENOMEM);
2114 /* unescape buffer of SOS, use special treatment for JPEG-LS */
2115 if (start_code == SOS && !s->ls) {
2116 const uint8_t *src = *buf_ptr;
2117 const uint8_t *ptr = src;
2118 uint8_t *dst = s->buffer;
2120 #define copy_data_segment(skip) do { \
2121 ptrdiff_t length = (ptr - src) - (skip); \
2123 memcpy(dst, src, length); \
2129 if (s->avctx->codec_id == AV_CODEC_ID_THP) {
2131 copy_data_segment(0);
2133 while (ptr < buf_end) {
2134 uint8_t x = *(ptr++);
2138 while (ptr < buf_end && x == 0xff) {
2143 /* 0xFF, 0xFF, ... */
2145 copy_data_segment(skip);
2147 /* decrement src as it is equal to ptr after the
2148 * copy_data_segment macro and we might want to
2149 * copy the current value of x later on */
2153 if (x < 0xd0 || x > 0xd7) {
2154 copy_data_segment(1);
2161 copy_data_segment(0);
2163 #undef copy_data_segment
2165 *unescaped_buf_ptr = s->buffer;
2166 *unescaped_buf_size = dst - s->buffer;
2167 memset(s->buffer + *unescaped_buf_size, 0,
2168 AV_INPUT_BUFFER_PADDING_SIZE);
2170 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
2171 (buf_end - *buf_ptr) - (dst - s->buffer));
2172 } else if (start_code == SOS && s->ls) {
2173 const uint8_t *src = *buf_ptr;
2174 uint8_t *dst = s->buffer;
2180 while (src + t < buf_end) {
2181 uint8_t x = src[t++];
2183 while ((src + t < buf_end) && x == 0xff)
2192 init_put_bits(&pb, dst, t);
2194 /* unescape bitstream */
2196 uint8_t x = src[b++];
2197 put_bits(&pb, 8, x);
2198 if (x == 0xFF && b < t) {
2201 av_log(s->avctx, AV_LOG_WARNING, "Invalid escape sequence\n");
2204 put_bits(&pb, 7, x);
2208 flush_put_bits(&pb);
2210 *unescaped_buf_ptr = dst;
2211 *unescaped_buf_size = (bit_count + 7) >> 3;
2212 memset(s->buffer + *unescaped_buf_size, 0,
2213 AV_INPUT_BUFFER_PADDING_SIZE);
2215 *unescaped_buf_ptr = *buf_ptr;
2216 *unescaped_buf_size = buf_end - *buf_ptr;
2222 static void reset_icc_profile(MJpegDecodeContext *s)
2227 for (i = 0; i < s->iccnum; i++)
2228 av_freep(&s->iccdata[i]);
2229 av_freep(&s->iccdata);
2230 av_freep(&s->iccdatalens);
2236 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
2239 AVFrame *frame = data;
2240 const uint8_t *buf = avpkt->data;
2241 int buf_size = avpkt->size;
2242 MJpegDecodeContext *s = avctx->priv_data;
2243 const uint8_t *buf_end, *buf_ptr;
2244 const uint8_t *unescaped_buf_ptr;
2246 int unescaped_buf_size;
2252 s->buf_size = buf_size;
2254 av_dict_free(&s->exif_metadata);
2255 av_freep(&s->stereo3d);
2256 s->adobe_transform = -1;
2259 reset_icc_profile(s);
2262 buf_end = buf + buf_size;
2263 while (buf_ptr < buf_end) {
2264 /* find start next marker */
2265 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
2267 &unescaped_buf_size);
2269 if (start_code < 0) {
2271 } else if (unescaped_buf_size > INT_MAX / 8) {
2272 av_log(avctx, AV_LOG_ERROR,
2273 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
2274 start_code, unescaped_buf_size, buf_size);
2275 return AVERROR_INVALIDDATA;
2277 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
2278 start_code, buf_end - buf_ptr);
2280 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
2283 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
2287 s->start_code = start_code;
2288 if (s->avctx->debug & FF_DEBUG_STARTCODE)
2289 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
2291 /* process markers */
2292 if (start_code >= 0xd0 && start_code <= 0xd7) {
2293 av_log(avctx, AV_LOG_DEBUG,
2294 "restart marker: %d\n", start_code & 0x0f);
2296 } else if (start_code >= APP0 && start_code <= APP15) {
2297 if ((ret = mjpeg_decode_app(s)) < 0)
2298 av_log(avctx, AV_LOG_ERROR, "unable to decode APP fields: %s\n",
2301 } else if (start_code == COM) {
2302 ret = mjpeg_decode_com(s);
2305 } else if (start_code == DQT) {
2306 ret = ff_mjpeg_decode_dqt(s);
2313 if (!CONFIG_JPEGLS_DECODER &&
2314 (start_code == SOF48 || start_code == LSE)) {
2315 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
2316 return AVERROR(ENOSYS);
2319 if (avctx->skip_frame == AVDISCARD_ALL) {
2320 switch(start_code) {
2335 switch (start_code) {
2337 s->restart_interval = 0;
2338 s->restart_count = 0;
2339 s->raw_image_buffer = buf_ptr;
2340 s->raw_image_buffer_size = buf_end - buf_ptr;
2341 /* nothing to do on SOI */
2344 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
2345 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
2351 if (start_code == SOF0)
2352 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_BASELINE_DCT;
2354 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_EXTENDED_SEQUENTIAL_DCT;
2358 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2362 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_PROGRESSIVE_DCT;
2366 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2370 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_LOSSLESS;
2371 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2375 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2379 s->avctx->profile = FF_PROFILE_MJPEG_JPEG_LS;
2380 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2384 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2388 if (!CONFIG_JPEGLS_DECODER ||
2389 (ret = ff_jpegls_decode_lse(s)) < 0)
2394 if (!avctx->hwaccel && avctx->skip_frame != AVDISCARD_ALL &&
2395 s->progressive && s->cur_scan && s->got_picture)
2396 mjpeg_idct_scan_progressive_ac(s);
2398 if (!s->got_picture) {
2399 av_log(avctx, AV_LOG_WARNING,
2400 "Found EOI before any SOF, ignoring\n");
2403 if (s->interlaced) {
2404 s->bottom_field ^= 1;
2405 /* if not bottom field, do not output image yet */
2406 if (s->bottom_field == !s->interlace_polarity)
2409 if (avctx->skip_frame == AVDISCARD_ALL) {
2411 goto the_end_no_picture;
2413 if (s->avctx->hwaccel) {
2414 ret = s->avctx->hwaccel->end_frame(s->avctx);
2418 av_freep(&s->hwaccel_picture_private);
2420 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2426 int qp = FFMAX3(s->qscale[0],
2429 int qpw = (s->width + 15) / 16;
2430 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2432 memset(qp_table_buf->data, qp, qpw);
2433 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2436 if(avctx->debug & FF_DEBUG_QP)
2437 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2442 s->raw_scan_buffer = buf_ptr;
2443 s->raw_scan_buffer_size = buf_end - buf_ptr;
2446 if (avctx->skip_frame == AVDISCARD_ALL) {
2447 skip_bits(&s->gb, get_bits_left(&s->gb));
2451 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2452 (avctx->err_recognition & AV_EF_EXPLODE))
2456 if ((ret = mjpeg_decode_dri(s)) < 0)
2469 av_log(avctx, AV_LOG_ERROR,
2470 "mjpeg: unsupported coding type (%x)\n", start_code);
2475 /* eof process start code */
2476 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2477 av_log(avctx, AV_LOG_DEBUG,
2478 "marker parser used %d bytes (%d bits)\n",
2479 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2481 if (s->got_picture && s->cur_scan) {
2482 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2485 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2486 return AVERROR_INVALIDDATA;
2492 is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step > 1;
2494 if (AV_RB32(s->upscale_h)) {
2496 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2497 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2498 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2499 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2500 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2501 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2502 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2503 avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2504 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2505 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2506 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2507 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2509 ret = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2513 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2514 for (p = 0; p<s->nb_components; p++) {
2515 uint8_t *line = s->picture_ptr->data[p];
2518 if (!s->upscale_h[p])
2521 w = AV_CEIL_RSHIFT(w, hshift);
2522 h = AV_CEIL_RSHIFT(h, vshift);
2524 if (s->upscale_v[p])
2527 for (i = 0; i < h; i++) {
2528 if (s->upscale_h[p] == 1) {
2529 if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2530 else line[w - 1] = line[(w - 1) / 2];
2531 for (index = w - 2; index > 0; index--) {
2533 ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2535 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2537 } else if (s->upscale_h[p] == 2) {
2539 ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 3];
2541 ((uint16_t*)line)[w - 2] = ((uint16_t*)line)[w - 1];
2543 line[w - 1] = line[(w - 1) / 3];
2545 line[w - 2] = line[w - 1];
2547 for (index = w - 3; index > 0; index--) {
2548 line[index] = (line[index / 3] + line[(index + 1) / 3] + line[(index + 2) / 3] + 1) / 3;
2551 line += s->linesize[p];
2555 if (AV_RB32(s->upscale_v)) {
2557 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2558 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2559 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2560 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2561 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2562 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2563 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2564 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2565 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2566 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2567 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2568 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2569 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2571 ret = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2575 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2576 for (p = 0; p < s->nb_components; p++) {
2580 if (!s->upscale_v[p])
2583 w = AV_CEIL_RSHIFT(w, hshift);
2584 h = AV_CEIL_RSHIFT(h, vshift);
2586 dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2587 for (i = h - 1; i; i--) {
2588 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2589 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2590 if (src1 == src2 || i == h - 1) {
2591 memcpy(dst, src1, w);
2593 for (index = 0; index < w; index++)
2594 dst[index] = (src1[index] + src2[index]) >> 1;
2596 dst -= s->linesize[p];
2600 if (s->flipped && !s->rgb) {
2602 ret = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2606 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2607 for (index=0; index<s->nb_components; index++) {
2608 uint8_t *dst = s->picture_ptr->data[index];
2609 int w = s->picture_ptr->width;
2610 int h = s->picture_ptr->height;
2611 if(index && index<3){
2612 w = AV_CEIL_RSHIFT(w, hshift);
2613 h = AV_CEIL_RSHIFT(h, vshift);
2616 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2617 for (i=0; i<h/2; i++) {
2619 FFSWAP(int, dst[j], dst2[j]);
2620 dst += s->picture_ptr->linesize[index];
2621 dst2 -= s->picture_ptr->linesize[index];
2626 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2627 int w = s->picture_ptr->width;
2628 int h = s->picture_ptr->height;
2629 av_assert0(s->nb_components == 4);
2630 for (i=0; i<h; i++) {
2633 for (index=0; index<4; index++) {
2634 dst[index] = s->picture_ptr->data[index]
2635 + s->picture_ptr->linesize[index]*i;
2637 for (j=0; j<w; j++) {
2639 int r = dst[0][j] * k;
2640 int g = dst[1][j] * k;
2641 int b = dst[2][j] * k;
2642 dst[0][j] = g*257 >> 16;
2643 dst[1][j] = b*257 >> 16;
2644 dst[2][j] = r*257 >> 16;
2649 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2650 int w = s->picture_ptr->width;
2651 int h = s->picture_ptr->height;
2652 av_assert0(s->nb_components == 4);
2653 for (i=0; i<h; i++) {
2656 for (index=0; index<4; index++) {
2657 dst[index] = s->picture_ptr->data[index]
2658 + s->picture_ptr->linesize[index]*i;
2660 for (j=0; j<w; j++) {
2662 int r = (255 - dst[0][j]) * k;
2663 int g = (128 - dst[1][j]) * k;
2664 int b = (128 - dst[2][j]) * k;
2665 dst[0][j] = r*257 >> 16;
2666 dst[1][j] = (g*257 >> 16) + 128;
2667 dst[2][j] = (b*257 >> 16) + 128;
2674 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2676 stereo->type = s->stereo3d->type;
2677 stereo->flags = s->stereo3d->flags;
2679 av_freep(&s->stereo3d);
2682 if (s->iccnum != 0 && s->iccnum == s->iccread) {
2683 AVFrameSideData *sd;
2688 /* Sum size of all parts. */
2689 for (i = 0; i < s->iccnum; i++)
2690 total_size += s->iccdatalens[i];
2692 sd = av_frame_new_side_data(data, AV_FRAME_DATA_ICC_PROFILE, total_size);
2694 av_log(s->avctx, AV_LOG_ERROR, "Could not allocate frame side data\n");
2695 return AVERROR(ENOMEM);
2698 /* Reassemble the parts, which are now in-order. */
2699 for (i = 0; i < s->iccnum; i++) {
2700 memcpy(sd->data + offset, s->iccdata[i], s->iccdatalens[i]);
2701 offset += s->iccdatalens[i];
2705 av_dict_copy(&((AVFrame *) data)->metadata, s->exif_metadata, 0);
2706 av_dict_free(&s->exif_metadata);
2709 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2711 // return buf_end - buf_ptr;
2712 return buf_ptr - buf;
2715 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2717 MJpegDecodeContext *s = avctx->priv_data;
2720 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2721 av_log(avctx, AV_LOG_INFO, "Single field\n");
2725 av_frame_free(&s->picture);
2726 s->picture_ptr = NULL;
2727 } else if (s->picture_ptr)
2728 av_frame_unref(s->picture_ptr);
2730 av_freep(&s->buffer);
2731 av_freep(&s->stereo3d);
2732 av_freep(&s->ljpeg_buffer);
2733 s->ljpeg_buffer_size = 0;
2735 for (i = 0; i < 3; i++) {
2736 for (j = 0; j < 4; j++)
2737 ff_free_vlc(&s->vlcs[i][j]);
2739 for (i = 0; i < MAX_COMPONENTS; i++) {
2740 av_freep(&s->blocks[i]);
2741 av_freep(&s->last_nnz[i]);
2743 av_dict_free(&s->exif_metadata);
2745 reset_icc_profile(s);
2747 av_freep(&s->hwaccel_picture_private);
2752 static void decode_flush(AVCodecContext *avctx)
2754 MJpegDecodeContext *s = avctx->priv_data;
2758 #if CONFIG_MJPEG_DECODER
2759 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2760 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2761 static const AVOption options[] = {
2762 { "extern_huff", "Use external huffman table.",
2763 OFFSET(extern_huff), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
2767 static const AVClass mjpegdec_class = {
2768 .class_name = "MJPEG decoder",
2769 .item_name = av_default_item_name,
2771 .version = LIBAVUTIL_VERSION_INT,
2774 AVCodec ff_mjpeg_decoder = {
2776 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2777 .type = AVMEDIA_TYPE_VIDEO,
2778 .id = AV_CODEC_ID_MJPEG,
2779 .priv_data_size = sizeof(MJpegDecodeContext),
2780 .init = ff_mjpeg_decode_init,
2781 .close = ff_mjpeg_decode_end,
2782 .decode = ff_mjpeg_decode_frame,
2783 .flush = decode_flush,
2784 .capabilities = AV_CODEC_CAP_DR1,
2786 .priv_class = &mjpegdec_class,
2787 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
2788 FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2789 .hw_configs = (const AVCodecHWConfigInternal*[]) {
2790 #if CONFIG_MJPEG_NVDEC_HWACCEL
2791 HWACCEL_NVDEC(mjpeg),
2793 #if CONFIG_MJPEG_VAAPI_HWACCEL
2794 HWACCEL_VAAPI(mjpeg),
2800 #if CONFIG_THP_DECODER
2801 AVCodec ff_thp_decoder = {
2803 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2804 .type = AVMEDIA_TYPE_VIDEO,
2805 .id = AV_CODEC_ID_THP,
2806 .priv_data_size = sizeof(MJpegDecodeContext),
2807 .init = ff_mjpeg_decode_init,
2808 .close = ff_mjpeg_decode_end,
2809 .decode = ff_mjpeg_decode_frame,
2810 .flush = decode_flush,
2811 .capabilities = AV_CODEC_CAP_DR1,
2813 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,