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"
41 #include "jpegtables.h"
44 #include "jpeglsdec.h"
48 #include "bytestream.h"
51 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
52 const uint8_t *val_table, int nb_codes,
53 int use_static, int is_ac)
55 uint8_t huff_size[256] = { 0 };
56 uint16_t huff_code[256];
57 uint16_t huff_sym[256];
60 av_assert0(nb_codes <= 256);
62 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
64 for (i = 0; i < 256; i++)
65 huff_sym[i] = i + 16 * is_ac;
68 huff_sym[0] = 16 * 256;
70 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
71 huff_code, 2, 2, huff_sym, 2, 2, use_static);
74 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
76 build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
77 avpriv_mjpeg_val_dc, 12, 0, 0);
78 build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
79 avpriv_mjpeg_val_dc, 12, 0, 0);
80 build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
81 avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
82 build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
83 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
84 build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
85 avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
86 build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
87 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
90 static void parse_avid(MJpegDecodeContext *s, uint8_t *buf, int len)
93 if (len > 14 && buf[12] == 1) /* 1 - NTSC */
94 s->interlace_polarity = 1;
95 if (len > 14 && buf[12] == 2) /* 2 - PAL */
96 s->interlace_polarity = 0;
97 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
98 av_log(s->avctx, AV_LOG_INFO, "AVID: len:%d %d\n", len, len > 14 ? buf[12] : -1);
101 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
103 MJpegDecodeContext *s = avctx->priv_data;
105 if (!s->picture_ptr) {
106 s->picture = av_frame_alloc();
108 return AVERROR(ENOMEM);
109 s->picture_ptr = s->picture;
113 ff_blockdsp_init(&s->bdsp, avctx);
114 ff_hpeldsp_init(&s->hdsp, avctx->flags);
115 ff_idctdsp_init(&s->idsp, avctx);
116 ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
121 s->first_picture = 1;
123 s->org_height = avctx->coded_height;
124 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
125 avctx->colorspace = AVCOL_SPC_BT470BG;
127 build_basic_mjpeg_vlc(s);
129 if (s->extern_huff) {
130 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
131 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
132 if (ff_mjpeg_decode_dht(s)) {
133 av_log(avctx, AV_LOG_ERROR,
134 "error using external huffman table, switching back to internal\n");
135 build_basic_mjpeg_vlc(s);
138 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
139 s->interlace_polarity = 1; /* bottom field first */
140 av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
141 } else if (avctx->field_order == AV_FIELD_UNKNOWN) {
142 if (avctx->codec_tag == AV_RL32("MJPG"))
143 s->interlace_polarity = 1;
146 if ( avctx->extradata_size > 8
147 && AV_RL32(avctx->extradata) == 0x2C
148 && AV_RL32(avctx->extradata+4) == 0x18) {
149 parse_avid(s, avctx->extradata, avctx->extradata_size);
152 if (avctx->codec->id == AV_CODEC_ID_AMV)
159 /* quantize tables */
160 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
162 int len, index, i, j;
164 len = get_bits(&s->gb, 16) - 2;
166 if (8*len > get_bits_left(&s->gb)) {
167 av_log(s->avctx, AV_LOG_ERROR, "dqt: len %d is too large\n", len);
168 return AVERROR_INVALIDDATA;
172 int pr = get_bits(&s->gb, 4);
174 av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
175 return AVERROR_INVALIDDATA;
177 index = get_bits(&s->gb, 4);
180 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
181 /* read quant table */
182 for (i = 0; i < 64; i++) {
183 j = s->scantable.permutated[i];
184 s->quant_matrixes[index][j] = get_bits(&s->gb, pr ? 16 : 8);
187 // XXX FIXME finetune, and perhaps add dc too
188 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
189 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
190 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
191 index, s->qscale[index]);
192 len -= 1 + 64 * (1+pr);
197 /* decode huffman tables and build VLC decoders */
198 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
200 int len, index, i, class, n, v, code_max;
201 uint8_t bits_table[17];
202 uint8_t val_table[256];
205 len = get_bits(&s->gb, 16) - 2;
207 if (8*len > get_bits_left(&s->gb)) {
208 av_log(s->avctx, AV_LOG_ERROR, "dht: len %d is too large\n", len);
209 return AVERROR_INVALIDDATA;
214 return AVERROR_INVALIDDATA;
215 class = get_bits(&s->gb, 4);
217 return AVERROR_INVALIDDATA;
218 index = get_bits(&s->gb, 4);
220 return AVERROR_INVALIDDATA;
222 for (i = 1; i <= 16; i++) {
223 bits_table[i] = get_bits(&s->gb, 8);
227 if (len < n || n > 256)
228 return AVERROR_INVALIDDATA;
231 for (i = 0; i < n; i++) {
232 v = get_bits(&s->gb, 8);
239 /* build VLC and flush previous vlc if present */
240 ff_free_vlc(&s->vlcs[class][index]);
241 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
242 class, index, code_max + 1);
243 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
244 code_max + 1, 0, class > 0)) < 0)
248 ff_free_vlc(&s->vlcs[2][index]);
249 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
250 code_max + 1, 0, 0)) < 0)
257 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
259 int len, nb_components, i, width, height, bits, ret;
261 int h_count[MAX_COMPONENTS] = { 0 };
262 int v_count[MAX_COMPONENTS] = { 0 };
265 memset(s->upscale_h, 0, sizeof(s->upscale_h));
266 memset(s->upscale_v, 0, sizeof(s->upscale_v));
268 /* XXX: verify len field validity */
269 len = get_bits(&s->gb, 16);
270 s->avctx->bits_per_raw_sample =
271 bits = get_bits(&s->gb, 8);
273 if (bits > 16 || bits < 1) {
274 av_log(s->avctx, AV_LOG_ERROR, "bits %d is invalid\n", bits);
275 return AVERROR_INVALIDDATA;
280 if (bits == 9 && !s->pegasus_rct)
281 s->rct = 1; // FIXME ugly
283 if(s->lossless && s->avctx->lowres){
284 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
288 height = get_bits(&s->gb, 16);
289 width = get_bits(&s->gb, 16);
291 if (s->avctx->codec_id == AV_CODEC_ID_AMV && (height&15))
292 avpriv_request_sample(s->avctx, "non mod 16 height AMV\n");
294 // HACK for odd_height.mov
295 if (s->interlaced && s->width == width && s->height == height + 1)
298 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
299 if (av_image_check_size(width, height, 0, s->avctx))
300 return AVERROR_INVALIDDATA;
302 nb_components = get_bits(&s->gb, 8);
303 if (nb_components <= 0 ||
304 nb_components > MAX_COMPONENTS)
306 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
307 if (nb_components != s->nb_components) {
308 av_log(s->avctx, AV_LOG_ERROR,
309 "nb_components changing in interlaced picture\n");
310 return AVERROR_INVALIDDATA;
313 if (s->ls && !(bits <= 8 || nb_components == 1)) {
314 avpriv_report_missing_feature(s->avctx,
315 "JPEG-LS that is not <= 8 "
316 "bits/component or 16-bit gray");
317 return AVERROR_PATCHWELCOME;
319 s->nb_components = nb_components;
322 for (i = 0; i < nb_components; i++) {
324 s->component_id[i] = get_bits(&s->gb, 8) - 1;
325 h_count[i] = get_bits(&s->gb, 4);
326 v_count[i] = get_bits(&s->gb, 4);
327 /* compute hmax and vmax (only used in interleaved case) */
328 if (h_count[i] > s->h_max)
329 s->h_max = h_count[i];
330 if (v_count[i] > s->v_max)
331 s->v_max = v_count[i];
332 s->quant_index[i] = get_bits(&s->gb, 8);
333 if (s->quant_index[i] >= 4) {
334 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
335 return AVERROR_INVALIDDATA;
337 if (!h_count[i] || !v_count[i]) {
338 av_log(s->avctx, AV_LOG_ERROR,
339 "Invalid sampling factor in component %d %d:%d\n",
340 i, h_count[i], v_count[i]);
341 return AVERROR_INVALIDDATA;
344 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
345 i, h_count[i], v_count[i],
346 s->component_id[i], s->quant_index[i]);
349 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
350 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
351 return AVERROR_PATCHWELCOME;
355 /* if different size, realloc/alloc picture */
356 if (width != s->width || height != s->height || bits != s->bits ||
357 memcmp(s->h_count, h_count, sizeof(h_count)) ||
358 memcmp(s->v_count, v_count, sizeof(v_count))) {
363 memcpy(s->h_count, h_count, sizeof(h_count));
364 memcpy(s->v_count, v_count, sizeof(v_count));
368 /* test interlaced mode */
369 if (s->first_picture &&
370 (s->multiscope != 2 || s->avctx->time_base.den >= 25 * s->avctx->time_base.num) &&
371 s->org_height != 0 &&
372 s->height < ((s->org_height * 3) / 4)) {
374 s->bottom_field = s->interlace_polarity;
375 s->picture_ptr->interlaced_frame = 1;
376 s->picture_ptr->top_field_first = !s->interlace_polarity;
380 ret = ff_set_dimensions(s->avctx, width, height);
384 s->first_picture = 0;
387 if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
388 if (s->progressive) {
389 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
390 return AVERROR_INVALIDDATA;
393 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
395 else if (!s->lossless)
397 /* XXX: not complete test ! */
398 pix_fmt_id = ((unsigned)s->h_count[0] << 28) | (s->v_count[0] << 24) |
399 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
400 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
401 (s->h_count[3] << 4) | s->v_count[3];
402 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
403 /* NOTE we do not allocate pictures large enough for the possible
404 * padding of h/v_count being 4 */
405 if (!(pix_fmt_id & 0xD0D0D0D0))
406 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
407 if (!(pix_fmt_id & 0x0D0D0D0D))
408 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
410 for (i = 0; i < 8; i++) {
411 int j = 6 + (i&1) - (i&6);
412 int is = (pix_fmt_id >> (4*i)) & 0xF;
413 int js = (pix_fmt_id >> (4*j)) & 0xF;
415 if (is == 1 && js != 2 && (i < 2 || i > 5))
416 js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
417 if (is == 1 && js != 2 && (i < 2 || i > 5))
418 js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
420 if (is == 1 && js == 2) {
421 if (i & 1) s->upscale_h[j/2] = 1;
422 else s->upscale_v[j/2] = 1;
426 switch (pix_fmt_id) {
429 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
431 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
432 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
434 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
435 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
436 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
439 av_assert0(s->nb_components == 3);
443 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
445 if (s->adobe_transform == 0 && s->bits <= 8) {
446 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
448 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
449 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
452 av_assert0(s->nb_components == 4);
456 if (s->adobe_transform == 0 && s->bits <= 8) {
457 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
458 s->upscale_v[1] = s->upscale_v[2] = 1;
459 s->upscale_h[1] = s->upscale_h[2] = 1;
460 } else if (s->adobe_transform == 2 && s->bits <= 8) {
461 s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
462 s->upscale_v[1] = s->upscale_v[2] = 1;
463 s->upscale_h[1] = s->upscale_h[2] = 1;
464 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
466 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
467 else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
468 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
470 av_assert0(s->nb_components == 4);
476 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
479 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
484 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
487 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
499 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
501 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
508 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
509 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
512 s->upscale_v[0] = s->upscale_v[1] = 1;
514 if (pix_fmt_id == 0x14111100)
515 s->upscale_v[1] = s->upscale_v[2] = 1;
516 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
519 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
523 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
524 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
527 s->upscale_h[0] = s->upscale_h[1] = 1;
529 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
530 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
531 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
537 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
538 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
539 s->upscale_h[1] = s->upscale_h[2] = 2;
543 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
546 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
551 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
552 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
553 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
554 if (pix_fmt_id == 0x42111100) {
557 s->upscale_h[1] = s->upscale_h[2] = 1;
558 } else if (pix_fmt_id == 0x24111100) {
561 s->upscale_v[1] = s->upscale_v[2] = 1;
565 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
568 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
572 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x bits:%d\n", pix_fmt_id, s->bits);
573 memset(s->upscale_h, 0, sizeof(s->upscale_h));
574 memset(s->upscale_v, 0, sizeof(s->upscale_v));
575 return AVERROR_PATCHWELCOME;
577 if ((AV_RB32(s->upscale_h) || AV_RB32(s->upscale_v)) && s->avctx->lowres) {
578 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
579 return AVERROR_PATCHWELCOME;
582 memset(s->upscale_h, 0, sizeof(s->upscale_h));
583 memset(s->upscale_v, 0, sizeof(s->upscale_v));
584 if (s->nb_components == 3) {
585 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
586 } else if (s->nb_components != 1) {
587 av_log(s->avctx, AV_LOG_ERROR, "Unsupported number of components %d\n", s->nb_components);
588 return AVERROR_PATCHWELCOME;
589 } else if (s->palette_index && s->bits <= 8)
590 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
591 else if (s->bits <= 8)
592 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
594 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
597 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
599 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
603 av_frame_unref(s->picture_ptr);
604 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
606 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
607 s->picture_ptr->key_frame = 1;
610 for (i = 0; i < 4; i++)
611 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
613 ff_dlog(s->avctx, "%d %d %d %d %d %d\n",
614 s->width, s->height, s->linesize[0], s->linesize[1],
615 s->interlaced, s->avctx->height);
617 if (len != (8 + (3 * nb_components)))
618 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
621 if (s->rgb && !s->lossless && !s->ls) {
622 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
623 return AVERROR_PATCHWELCOME;
626 /* totally blank picture as progressive JPEG will only add details to it */
627 if (s->progressive) {
628 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
629 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
630 for (i = 0; i < s->nb_components; i++) {
631 int size = bw * bh * s->h_count[i] * s->v_count[i];
632 av_freep(&s->blocks[i]);
633 av_freep(&s->last_nnz[i]);
634 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
635 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
636 if (!s->blocks[i] || !s->last_nnz[i])
637 return AVERROR(ENOMEM);
638 s->block_stride[i] = bw * s->h_count[i];
640 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
645 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
648 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
649 if (code < 0 || code > 16) {
650 av_log(s->avctx, AV_LOG_WARNING,
651 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
652 0, dc_index, &s->vlcs[0][dc_index]);
657 return get_xbits(&s->gb, code);
662 /* decode block and dequantize */
663 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
664 int dc_index, int ac_index, int16_t *quant_matrix)
666 int code, i, j, level, val;
669 val = mjpeg_decode_dc(s, dc_index);
670 if (val == 0xfffff) {
671 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
672 return AVERROR_INVALIDDATA;
674 val = val * quant_matrix[0] + s->last_dc[component];
675 val = FFMIN(val, 32767);
676 s->last_dc[component] = val;
680 {OPEN_READER(re, &s->gb);
682 UPDATE_CACHE(re, &s->gb);
683 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
685 i += ((unsigned)code) >> 4;
688 if (code > MIN_CACHE_BITS - 16)
689 UPDATE_CACHE(re, &s->gb);
692 int cache = GET_CACHE(re, &s->gb);
693 int sign = (~cache) >> 31;
694 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
697 LAST_SKIP_BITS(re, &s->gb, code);
700 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
701 return AVERROR_INVALIDDATA;
703 j = s->scantable.permutated[i];
704 block[j] = level * quant_matrix[j];
707 CLOSE_READER(re, &s->gb);}
712 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
713 int component, int dc_index,
714 int16_t *quant_matrix, int Al)
717 s->bdsp.clear_block(block);
718 val = mjpeg_decode_dc(s, dc_index);
719 if (val == 0xfffff) {
720 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
721 return AVERROR_INVALIDDATA;
723 val = (val * (quant_matrix[0] << Al)) + s->last_dc[component];
724 s->last_dc[component] = val;
729 /* decode block and dequantize - progressive JPEG version */
730 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
731 uint8_t *last_nnz, int ac_index,
732 int16_t *quant_matrix,
733 int ss, int se, int Al, int *EOBRUN)
735 int code, i, j, level, val, run;
743 OPEN_READER(re, &s->gb);
744 for (i = ss; ; i++) {
745 UPDATE_CACHE(re, &s->gb);
746 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
748 run = ((unsigned) code) >> 4;
752 if (code > MIN_CACHE_BITS - 16)
753 UPDATE_CACHE(re, &s->gb);
756 int cache = GET_CACHE(re, &s->gb);
757 int sign = (~cache) >> 31;
758 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
761 LAST_SKIP_BITS(re, &s->gb, code);
765 j = s->scantable.permutated[se];
766 block[j] = level * (quant_matrix[j] << Al);
769 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
770 return AVERROR_INVALIDDATA;
772 j = s->scantable.permutated[i];
773 block[j] = level * (quant_matrix[j] << Al);
775 if (run == 0xF) {// ZRL - skip 15 coefficients
778 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
779 return AVERROR_INVALIDDATA;
784 UPDATE_CACHE(re, &s->gb);
785 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
786 LAST_SKIP_BITS(re, &s->gb, run);
793 CLOSE_READER(re, &s->gb);
802 #define REFINE_BIT(j) { \
803 UPDATE_CACHE(re, &s->gb); \
804 sign = block[j] >> 15; \
805 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
806 ((quant_matrix[j] ^ sign) - sign) << Al; \
807 LAST_SKIP_BITS(re, &s->gb, 1); \
815 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
820 j = s->scantable.permutated[i]; \
823 else if (run-- == 0) \
827 /* decode block and dequantize - progressive JPEG refinement pass */
828 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
830 int ac_index, int16_t *quant_matrix,
831 int ss, int se, int Al, int *EOBRUN)
833 int code, i = ss, j, sign, val, run;
834 int last = FFMIN(se, *last_nnz);
836 OPEN_READER(re, &s->gb);
841 UPDATE_CACHE(re, &s->gb);
842 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
845 run = ((unsigned) code) >> 4;
846 UPDATE_CACHE(re, &s->gb);
847 val = SHOW_UBITS(re, &s->gb, 1);
848 LAST_SKIP_BITS(re, &s->gb, 1);
850 j = s->scantable.permutated[i];
852 block[j] = ((quant_matrix[j] << Al) ^ val) - val;
856 CLOSE_READER(re, &s->gb);
860 run = ((unsigned) code) >> 4;
867 UPDATE_CACHE(re, &s->gb);
868 run += SHOW_UBITS(re, &s->gb, val);
869 LAST_SKIP_BITS(re, &s->gb, val);
881 for (; i <= last; i++) {
882 j = s->scantable.permutated[i];
886 CLOSE_READER(re, &s->gb);
893 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
898 if (s->restart_interval) {
900 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
901 align_get_bits(&s->gb);
902 for (i = 0; i < nb_components; i++) /* reset dc */
903 s->last_dc[i] = (4 << s->bits);
906 i = 8 + ((-get_bits_count(&s->gb)) & 7);
908 if (s->restart_count == 0) {
909 if( show_bits(&s->gb, i) == (1 << i) - 1
910 || show_bits(&s->gb, i) == 0xFF) {
911 int pos = get_bits_count(&s->gb);
912 align_get_bits(&s->gb);
913 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
914 skip_bits(&s->gb, 8);
915 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
916 for (i = 0; i < nb_components; i++) /* reset dc */
917 s->last_dc[i] = (4 << s->bits);
920 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
927 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
930 uint16_t (*buffer)[4];
931 int left[4], top[4], topleft[4];
932 const int linesize = s->linesize[0];
933 const int mask = ((1 << s->bits) - 1) << point_transform;
937 if (s->nb_components != 3 && s->nb_components != 4)
938 return AVERROR_INVALIDDATA;
939 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
940 return AVERROR_INVALIDDATA;
943 s->restart_count = s->restart_interval;
945 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
946 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
947 buffer = s->ljpeg_buffer;
949 for (i = 0; i < 4; i++)
950 buffer[0][i] = 1 << (s->bits - 1);
952 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
953 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
955 if (s->interlaced && s->bottom_field)
956 ptr += linesize >> 1;
958 for (i = 0; i < 4; i++)
959 top[i] = left[i] = topleft[i] = buffer[0][i];
961 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
962 int modified_predictor = predictor;
964 if (s->restart_interval && !s->restart_count){
965 s->restart_count = s->restart_interval;
969 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
971 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
972 modified_predictor = 1;
974 for (i=0;i<nb_components;i++) {
978 top[i] = buffer[mb_x][i];
980 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
982 dc = mjpeg_decode_dc(s, s->dc_index[i]);
986 left[i] = buffer[mb_x][i] =
987 mask & (pred + (dc << point_transform));
990 if (s->restart_interval && !--s->restart_count) {
991 align_get_bits(&s->gb);
992 skip_bits(&s->gb, 16); /* skip RSTn */
995 if (s->nb_components == 4) {
996 for(i=0; i<nb_components; i++) {
997 int c= s->comp_index[i];
999 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1000 ptr[4*mb_x+3-c] = buffer[mb_x][i];
1002 } else if(s->bits == 9) {
1003 return AVERROR_PATCHWELCOME;
1005 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1006 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
1010 } else if (s->rct) {
1011 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1012 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1013 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1014 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1016 } else if (s->pegasus_rct) {
1017 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1018 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
1019 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1020 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1023 for(i=0; i<nb_components; i++) {
1024 int c= s->comp_index[i];
1026 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1027 ptr[3*mb_x+2-c] = buffer[mb_x][i];
1029 } else if(s->bits == 9) {
1030 return AVERROR_PATCHWELCOME;
1032 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1033 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
1042 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1043 int point_transform, int nb_components)
1045 int i, mb_x, mb_y, mask;
1046 int bits= (s->bits+7)&~7;
1047 int resync_mb_y = 0;
1048 int resync_mb_x = 0;
1050 point_transform += bits - s->bits;
1051 mask = ((1 << s->bits) - 1) << point_transform;
1053 av_assert0(nb_components>=1 && nb_components<=4);
1055 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1056 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1057 if (s->restart_interval && !s->restart_count){
1058 s->restart_count = s->restart_interval;
1063 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1064 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1065 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1066 for (i = 0; i < nb_components; i++) {
1069 int n, h, v, x, y, c, j, linesize;
1070 n = s->nb_blocks[i];
1071 c = s->comp_index[i];
1076 linesize= s->linesize[c];
1078 if(bits>8) linesize /= 2;
1080 for(j=0; j<n; j++) {
1083 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1087 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1089 if(x==0 && leftcol){
1090 pred= 1 << (bits - 1);
1095 if(x==0 && leftcol){
1096 pred= ptr[-linesize];
1098 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1102 if (s->interlaced && s->bottom_field)
1103 ptr += linesize >> 1;
1105 *ptr= pred + (dc << point_transform);
1107 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1109 if(x==0 && leftcol){
1110 pred= 1 << (bits - 1);
1115 if(x==0 && leftcol){
1116 pred= ptr16[-linesize];
1118 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1122 if (s->interlaced && s->bottom_field)
1123 ptr16 += linesize >> 1;
1125 *ptr16= pred + (dc << point_transform);
1134 for (i = 0; i < nb_components; i++) {
1137 int n, h, v, x, y, c, j, linesize, dc;
1138 n = s->nb_blocks[i];
1139 c = s->comp_index[i];
1144 linesize = s->linesize[c];
1146 if(bits>8) linesize /= 2;
1148 for (j = 0; j < n; j++) {
1151 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1155 ptr = s->picture_ptr->data[c] +
1156 (linesize * (v * mb_y + y)) +
1157 (h * mb_x + x); //FIXME optimize this crap
1158 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1161 *ptr = pred + (dc << point_transform);
1163 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1164 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1167 *ptr16= pred + (dc << point_transform);
1177 if (s->restart_interval && !--s->restart_count) {
1178 align_get_bits(&s->gb);
1179 skip_bits(&s->gb, 16); /* skip RSTn */
1186 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1187 uint8_t *dst, const uint8_t *src,
1188 int linesize, int lowres)
1191 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1193 case 1: copy_block4(dst, src, linesize, linesize, 4);
1195 case 2: copy_block2(dst, src, linesize, linesize, 2);
1197 case 3: *dst = *src;
1202 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1204 int block_x, block_y;
1205 int size = 8 >> s->avctx->lowres;
1207 for (block_y=0; block_y<size; block_y++)
1208 for (block_x=0; block_x<size; block_x++)
1209 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1211 for (block_y=0; block_y<size; block_y++)
1212 for (block_x=0; block_x<size; block_x++)
1213 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1217 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1218 int Al, const uint8_t *mb_bitmask,
1219 int mb_bitmask_size,
1220 const AVFrame *reference)
1223 uint8_t *data[MAX_COMPONENTS];
1224 const uint8_t *reference_data[MAX_COMPONENTS];
1225 int linesize[MAX_COMPONENTS];
1226 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1227 int bytes_per_pixel = 1 + (s->bits > 8);
1230 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1231 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1232 return AVERROR_INVALIDDATA;
1234 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1237 s->restart_count = 0;
1239 for (i = 0; i < nb_components; i++) {
1240 int c = s->comp_index[i];
1241 data[c] = s->picture_ptr->data[c];
1242 reference_data[c] = reference ? reference->data[c] : NULL;
1243 linesize[c] = s->linesize[c];
1244 s->coefs_finished[c] |= 1;
1247 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1248 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1249 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1251 if (s->restart_interval && !s->restart_count)
1252 s->restart_count = s->restart_interval;
1254 if (get_bits_left(&s->gb) < 0) {
1255 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1256 -get_bits_left(&s->gb));
1257 return AVERROR_INVALIDDATA;
1259 for (i = 0; i < nb_components; i++) {
1261 int n, h, v, x, y, c, j;
1263 n = s->nb_blocks[i];
1264 c = s->comp_index[i];
1269 for (j = 0; j < n; j++) {
1270 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1271 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1273 if (s->interlaced && s->bottom_field)
1274 block_offset += linesize[c] >> 1;
1275 if ( 8*(h * mb_x + x) < s->width
1276 && 8*(v * mb_y + y) < s->height) {
1277 ptr = data[c] + block_offset;
1280 if (!s->progressive) {
1283 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1284 linesize[c], s->avctx->lowres);
1287 s->bdsp.clear_block(s->block);
1288 if (decode_block(s, s->block, i,
1289 s->dc_index[i], s->ac_index[i],
1290 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1291 av_log(s->avctx, AV_LOG_ERROR,
1292 "error y=%d x=%d\n", mb_y, mb_x);
1293 return AVERROR_INVALIDDATA;
1296 s->idsp.idct_put(ptr, linesize[c], s->block);
1298 shift_output(s, ptr, linesize[c]);
1302 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1304 int16_t *block = s->blocks[c][block_idx];
1306 block[0] += get_bits1(&s->gb) *
1307 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1308 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1309 s->quant_matrixes[s->quant_sindex[i]],
1311 av_log(s->avctx, AV_LOG_ERROR,
1312 "error y=%d x=%d\n", mb_y, mb_x);
1313 return AVERROR_INVALIDDATA;
1316 ff_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1317 ff_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1318 mb_x, mb_y, x, y, c, s->bottom_field,
1319 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1327 handle_rstn(s, nb_components);
1333 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1334 int se, int Ah, int Al)
1338 int c = s->comp_index[0];
1339 uint8_t *data = s->picture_ptr->data[c];
1340 int linesize = s->linesize[c];
1342 int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1343 int bytes_per_pixel = 1 + (s->bits > 8);
1345 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1346 if (se < ss || se > 63) {
1347 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1348 return AVERROR_INVALIDDATA;
1352 // s->coefs_finished is a bitmask for coefficients coded
1353 // ss and se are parameters telling start and end coefficients
1354 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1355 last_scan = !~s->coefs_finished[c];
1358 if (s->interlaced && s->bottom_field)
1359 data += linesize >> 1;
1361 s->restart_count = 0;
1363 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1364 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1365 int block_idx = mb_y * s->block_stride[c];
1366 int16_t (*block)[64] = &s->blocks[c][block_idx];
1367 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1368 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1370 if (s->restart_interval && !s->restart_count)
1371 s->restart_count = s->restart_interval;
1374 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1375 quant_matrix, ss, se, Al, &EOBRUN);
1377 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1378 quant_matrix, ss, se, Al, &EOBRUN);
1380 av_log(s->avctx, AV_LOG_ERROR,
1381 "error y=%d x=%d\n", mb_y, mb_x);
1382 return AVERROR_INVALIDDATA;
1386 s->idsp.idct_put(ptr, linesize, *block);
1388 shift_output(s, ptr, linesize);
1389 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1391 if (handle_rstn(s, 0))
1398 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1399 int mb_bitmask_size, const AVFrame *reference)
1401 int len, nb_components, i, h, v, predictor, point_transform;
1403 const int block_size = s->lossless ? 1 : 8;
1404 int ilv, prev_shift;
1406 if (!s->got_picture) {
1407 av_log(s->avctx, AV_LOG_WARNING,
1408 "Can not process SOS before SOF, skipping\n");
1412 av_assert0(s->picture_ptr->data[0]);
1413 /* XXX: verify len field validity */
1414 len = get_bits(&s->gb, 16);
1415 nb_components = get_bits(&s->gb, 8);
1416 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1417 av_log(s->avctx, AV_LOG_ERROR,
1418 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1419 return AVERROR_PATCHWELCOME;
1421 if (len != 6 + 2 * nb_components) {
1422 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1423 return AVERROR_INVALIDDATA;
1425 for (i = 0; i < nb_components; i++) {
1426 id = get_bits(&s->gb, 8) - 1;
1427 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1428 /* find component index */
1429 for (index = 0; index < s->nb_components; index++)
1430 if (id == s->component_id[index])
1432 if (index == s->nb_components) {
1433 av_log(s->avctx, AV_LOG_ERROR,
1434 "decode_sos: index(%d) out of components\n", index);
1435 return AVERROR_INVALIDDATA;
1437 /* Metasoft MJPEG codec has Cb and Cr swapped */
1438 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1439 && nb_components == 3 && s->nb_components == 3 && i)
1442 s->quant_sindex[i] = s->quant_index[index];
1443 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1444 s->h_scount[i] = s->h_count[index];
1445 s->v_scount[i] = s->v_count[index];
1447 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1449 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1450 index = (index+2)%3;
1452 s->comp_index[i] = index;
1454 s->dc_index[i] = get_bits(&s->gb, 4);
1455 s->ac_index[i] = get_bits(&s->gb, 4);
1457 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1458 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1460 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))
1464 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1465 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1466 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1467 prev_shift = get_bits(&s->gb, 4); /* Ah */
1468 point_transform = get_bits(&s->gb, 4); /* Al */
1470 prev_shift = point_transform = 0;
1472 if (nb_components > 1) {
1473 /* interleaved stream */
1474 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1475 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1476 } else if (!s->ls) { /* skip this for JPEG-LS */
1477 h = s->h_max / s->h_scount[0];
1478 v = s->v_max / s->v_scount[0];
1479 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1480 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1481 s->nb_blocks[0] = 1;
1486 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1487 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1488 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1489 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1490 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1493 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1494 for (i = s->mjpb_skiptosod; i > 0; i--)
1495 skip_bits(&s->gb, 8);
1498 for (i = 0; i < nb_components; i++)
1499 s->last_dc[i] = (4 << s->bits);
1502 av_assert0(s->picture_ptr == s->picture);
1503 if (CONFIG_JPEGLS_DECODER && s->ls) {
1505 // reset_ls_coding_parameters(s, 0);
1507 if ((ret = ff_jpegls_decode_picture(s, predictor,
1508 point_transform, ilv)) < 0)
1512 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1515 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1517 nb_components)) < 0)
1522 if (s->progressive && predictor) {
1523 av_assert0(s->picture_ptr == s->picture);
1524 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1526 point_transform)) < 0)
1529 if ((ret = mjpeg_decode_scan(s, nb_components,
1530 prev_shift, point_transform,
1531 mb_bitmask, mb_bitmask_size, reference)) < 0)
1536 if (s->interlaced &&
1537 get_bits_left(&s->gb) > 32 &&
1538 show_bits(&s->gb, 8) == 0xFF) {
1539 GetBitContext bak = s->gb;
1540 align_get_bits(&bak);
1541 if (show_bits(&bak, 16) == 0xFFD1) {
1542 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1544 skip_bits(&s->gb, 16);
1545 s->bottom_field ^= 1;
1554 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1555 return AVERROR_INVALIDDATA;
1558 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1560 if (get_bits(&s->gb, 16) != 4)
1561 return AVERROR_INVALIDDATA;
1562 s->restart_interval = get_bits(&s->gb, 16);
1563 s->restart_count = 0;
1564 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1565 s->restart_interval);
1570 static int mjpeg_decode_app(MJpegDecodeContext *s)
1574 len = get_bits(&s->gb, 16);
1576 return AVERROR_INVALIDDATA;
1577 if (8 * len > get_bits_left(&s->gb))
1578 return AVERROR_INVALIDDATA;
1580 id = get_bits_long(&s->gb, 32);
1583 if (s->avctx->debug & FF_DEBUG_STARTCODE) {
1585 av_get_codec_tag_string(id_str, sizeof(id_str), av_bswap32(id));
1586 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n", id_str, id, len);
1589 /* Buggy AVID, it puts EOI only at every 10th frame. */
1590 /* Also, this fourcc is used by non-avid files too, it holds some
1591 information, but it's always present in AVID-created files. */
1592 if (id == AV_RB32("AVI1")) {
1598 4bytes field_size_less_padding
1601 i = get_bits(&s->gb, 8); len--;
1602 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1604 skip_bits(&s->gb, 8);
1605 skip_bits(&s->gb, 32);
1606 skip_bits(&s->gb, 32);
1614 if (id == AV_RB32("JFIF")) {
1615 int t_w, t_h, v1, v2;
1616 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1617 v1 = get_bits(&s->gb, 8);
1618 v2 = get_bits(&s->gb, 8);
1619 skip_bits(&s->gb, 8);
1621 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1622 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1623 ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
1625 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1626 av_log(s->avctx, AV_LOG_INFO,
1627 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1629 s->avctx->sample_aspect_ratio.num,
1630 s->avctx->sample_aspect_ratio.den);
1632 t_w = get_bits(&s->gb, 8);
1633 t_h = get_bits(&s->gb, 8);
1635 /* skip thumbnail */
1636 if (len -10 - (t_w * t_h * 3) > 0)
1637 len -= t_w * t_h * 3;
1643 if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1644 skip_bits(&s->gb, 16); /* version */
1645 skip_bits(&s->gb, 16); /* flags0 */
1646 skip_bits(&s->gb, 16); /* flags1 */
1647 s->adobe_transform = get_bits(&s->gb, 8);
1648 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1649 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1654 if (id == AV_RB32("LJIF")) {
1656 int pegasus_rct = s->pegasus_rct;
1657 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1658 av_log(s->avctx, AV_LOG_INFO,
1659 "Pegasus lossless jpeg header found\n");
1660 skip_bits(&s->gb, 16); /* version ? */
1661 skip_bits(&s->gb, 16); /* unknown always 0? */
1662 skip_bits(&s->gb, 16); /* unknown always 0? */
1663 skip_bits(&s->gb, 16); /* unknown always 0? */
1664 switch (i=get_bits(&s->gb, 8)) {
1674 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1679 if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
1680 av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
1685 s->pegasus_rct = pegasus_rct;
1689 if (id == AV_RL32("colr") && len > 0) {
1690 s->colr = get_bits(&s->gb, 8);
1691 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1692 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1696 if (id == AV_RL32("xfrm") && len > 0) {
1697 s->xfrm = get_bits(&s->gb, 8);
1698 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1699 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1704 /* JPS extension by VRex */
1705 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1706 int flags, layout, type;
1707 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1708 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1710 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1711 skip_bits(&s->gb, 16); len -= 2; /* block length */
1712 skip_bits(&s->gb, 8); /* reserved */
1713 flags = get_bits(&s->gb, 8);
1714 layout = get_bits(&s->gb, 8);
1715 type = get_bits(&s->gb, 8);
1718 s->stereo3d = av_stereo3d_alloc();
1723 s->stereo3d->type = AV_STEREO3D_2D;
1724 } else if (type == 1) {
1727 s->stereo3d->type = AV_STEREO3D_LINES;
1730 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1733 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1736 if (!(flags & 0x04)) {
1737 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1744 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1745 GetByteContext gbytes;
1746 int ret, le, ifd_offset, bytes_read;
1747 const uint8_t *aligned;
1749 skip_bits(&s->gb, 16); // skip padding
1752 // init byte wise reading
1753 aligned = align_get_bits(&s->gb);
1754 bytestream2_init(&gbytes, aligned, len);
1757 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1759 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1761 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1763 // read 0th IFD and store the metadata
1764 // (return values > 0 indicate the presence of subimage metadata)
1765 ret = avpriv_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1767 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1771 bytes_read = bytestream2_tell(&gbytes);
1772 skip_bits(&s->gb, bytes_read << 3);
1779 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1780 id = get_bits_long(&s->gb, 32);
1783 if (id == AV_RB32("mjpg")) {
1785 skip_bits(&s->gb, 32); /* field size */
1786 skip_bits(&s->gb, 32); /* pad field size */
1787 skip_bits(&s->gb, 32); /* next off */
1788 skip_bits(&s->gb, 32); /* quant off */
1789 skip_bits(&s->gb, 32); /* huff off */
1790 skip_bits(&s->gb, 32); /* image off */
1791 skip_bits(&s->gb, 32); /* scan off */
1792 skip_bits(&s->gb, 32); /* data off */
1794 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1795 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1800 /* slow but needed for extreme adobe jpegs */
1802 av_log(s->avctx, AV_LOG_ERROR,
1803 "mjpeg: error, decode_app parser read over the end\n");
1805 skip_bits(&s->gb, 8);
1810 static int mjpeg_decode_com(MJpegDecodeContext *s)
1812 int len = get_bits(&s->gb, 16);
1813 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1814 char *cbuf = av_malloc(len - 1);
1817 for (i = 0; i < len - 2; i++)
1818 cbuf[i] = get_bits(&s->gb, 8);
1819 if (i > 0 && cbuf[i - 1] == '\n')
1824 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1825 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1827 /* buggy avid, it puts EOI only at every 10th frame */
1828 if (!strncmp(cbuf, "AVID", 4)) {
1829 parse_avid(s, cbuf, len);
1830 } else if (!strcmp(cbuf, "CS=ITU601"))
1832 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
1833 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1835 else if (!strcmp(cbuf, "MULTISCOPE II"))
1845 /* return the 8 bit start code value and update the search
1846 state. Return -1 if no start code found */
1847 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1849 const uint8_t *buf_ptr;
1854 buf_ptr = *pbuf_ptr;
1855 while (buf_end - buf_ptr > 1) {
1858 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1867 ff_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1868 *pbuf_ptr = buf_ptr;
1872 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1873 const uint8_t **buf_ptr, const uint8_t *buf_end,
1874 const uint8_t **unescaped_buf_ptr,
1875 int *unescaped_buf_size)
1878 start_code = find_marker(buf_ptr, buf_end);
1880 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1882 return AVERROR(ENOMEM);
1884 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1885 if (start_code == SOS && !s->ls) {
1886 const uint8_t *src = *buf_ptr;
1887 uint8_t *dst = s->buffer;
1889 while (src < buf_end) {
1890 uint8_t x = *(src++);
1893 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1895 while (src < buf_end && x == 0xff)
1898 if (x >= 0xd0 && x <= 0xd7)
1905 *unescaped_buf_ptr = s->buffer;
1906 *unescaped_buf_size = dst - s->buffer;
1907 memset(s->buffer + *unescaped_buf_size, 0,
1908 FF_INPUT_BUFFER_PADDING_SIZE);
1910 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
1911 (buf_end - *buf_ptr) - (dst - s->buffer));
1912 } else if (start_code == SOS && s->ls) {
1913 const uint8_t *src = *buf_ptr;
1914 uint8_t *dst = s->buffer;
1920 while (src + t < buf_end) {
1921 uint8_t x = src[t++];
1923 while ((src + t < buf_end) && x == 0xff)
1932 init_put_bits(&pb, dst, t);
1934 /* unescape bitstream */
1936 uint8_t x = src[b++];
1937 put_bits(&pb, 8, x);
1941 av_log(s->avctx, AV_LOG_WARNING, "Invalid escape sequence\n");
1944 put_bits(&pb, 7, x);
1948 flush_put_bits(&pb);
1950 *unescaped_buf_ptr = dst;
1951 *unescaped_buf_size = (bit_count + 7) >> 3;
1952 memset(s->buffer + *unescaped_buf_size, 0,
1953 FF_INPUT_BUFFER_PADDING_SIZE);
1955 *unescaped_buf_ptr = *buf_ptr;
1956 *unescaped_buf_size = buf_end - *buf_ptr;
1962 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1965 AVFrame *frame = data;
1966 const uint8_t *buf = avpkt->data;
1967 int buf_size = avpkt->size;
1968 MJpegDecodeContext *s = avctx->priv_data;
1969 const uint8_t *buf_end, *buf_ptr;
1970 const uint8_t *unescaped_buf_ptr;
1972 int unescaped_buf_size;
1978 av_dict_free(&s->exif_metadata);
1979 av_freep(&s->stereo3d);
1980 s->adobe_transform = -1;
1983 buf_end = buf + buf_size;
1984 while (buf_ptr < buf_end) {
1985 /* find start next marker */
1986 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1988 &unescaped_buf_size);
1990 if (start_code < 0) {
1992 } else if (unescaped_buf_size > INT_MAX / 8) {
1993 av_log(avctx, AV_LOG_ERROR,
1994 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1995 start_code, unescaped_buf_size, buf_size);
1996 return AVERROR_INVALIDDATA;
1998 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
1999 start_code, buf_end - buf_ptr);
2001 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
2004 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
2008 s->start_code = start_code;
2009 if (s->avctx->debug & FF_DEBUG_STARTCODE)
2010 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
2012 /* process markers */
2013 if (start_code >= 0xd0 && start_code <= 0xd7)
2014 av_log(avctx, AV_LOG_DEBUG,
2015 "restart marker: %d\n", start_code & 0x0f);
2017 else if (start_code >= APP0 && start_code <= APP15)
2018 mjpeg_decode_app(s);
2020 else if (start_code == COM)
2021 mjpeg_decode_com(s);
2025 if (!CONFIG_JPEGLS_DECODER &&
2026 (start_code == SOF48 || start_code == LSE)) {
2027 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
2028 return AVERROR(ENOSYS);
2031 switch (start_code) {
2033 s->restart_interval = 0;
2034 s->restart_count = 0;
2035 /* nothing to do on SOI */
2038 ff_mjpeg_decode_dqt(s);
2041 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
2042 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
2051 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2058 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2062 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2066 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2070 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2074 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2078 if (!CONFIG_JPEGLS_DECODER ||
2079 (ret = ff_jpegls_decode_lse(s)) < 0)
2085 if (!s->got_picture) {
2086 av_log(avctx, AV_LOG_WARNING,
2087 "Found EOI before any SOF, ignoring\n");
2090 if (s->interlaced) {
2091 s->bottom_field ^= 1;
2092 /* if not bottom field, do not output image yet */
2093 if (s->bottom_field == !s->interlace_polarity)
2096 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2102 int qp = FFMAX3(s->qscale[0],
2105 int qpw = (s->width + 15) / 16;
2106 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2108 memset(qp_table_buf->data, qp, qpw);
2109 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2112 if(avctx->debug & FF_DEBUG_QP)
2113 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2119 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2120 (avctx->err_recognition & AV_EF_EXPLODE))
2124 mjpeg_decode_dri(s);
2136 av_log(avctx, AV_LOG_ERROR,
2137 "mjpeg: unsupported coding type (%x)\n", start_code);
2141 /* eof process start code */
2142 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2143 av_log(avctx, AV_LOG_DEBUG,
2144 "marker parser used %d bytes (%d bits)\n",
2145 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2147 if (s->got_picture && s->cur_scan) {
2148 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2151 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2152 return AVERROR_INVALIDDATA;
2158 is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step_minus1;
2160 if (AV_RB32(s->upscale_h)) {
2162 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2163 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2164 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2165 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2166 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2167 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2168 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2169 avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2170 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2171 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2172 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2173 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2175 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2176 for (p = 0; p<4; p++) {
2177 uint8_t *line = s->picture_ptr->data[p];
2180 if (!s->upscale_h[p])
2183 w = FF_CEIL_RSHIFT(w, hshift);
2184 h = FF_CEIL_RSHIFT(h, vshift);
2186 if (s->upscale_v[p])
2189 for (i = 0; i < h; i++) {
2190 if (s->upscale_h[p] == 1) {
2191 if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2192 else line[w - 1] = line[(w - 1) / 2];
2193 for (index = w - 2; index > 0; index--) {
2195 ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2197 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2199 } else if (s->upscale_h[p] == 2) {
2201 ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 3];
2203 ((uint16_t*)line)[w - 2] = ((uint16_t*)line)[w - 1];
2205 line[w - 1] = line[(w - 1) / 3];
2207 line[w - 2] = line[w - 1];
2209 for (index = w - 3; index > 0; index--) {
2210 line[index] = (line[index / 3] + line[(index + 1) / 3] + line[(index + 2) / 3] + 1) / 3;
2213 line += s->linesize[p];
2217 if (AV_RB32(s->upscale_v)) {
2219 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2220 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2221 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2222 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2223 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2224 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2225 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2226 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2227 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2228 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2229 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2230 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2231 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2233 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2234 for (p = 0; p < 4; p++) {
2238 if (!s->upscale_v[p])
2241 w = FF_CEIL_RSHIFT(w, hshift);
2242 h = FF_CEIL_RSHIFT(h, vshift);
2244 dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2245 for (i = h - 1; i; i--) {
2246 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2247 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2248 if (src1 == src2 || i == h - 1) {
2249 memcpy(dst, src1, w);
2251 for (index = 0; index < w; index++)
2252 dst[index] = (src1[index] + src2[index]) >> 1;
2254 dst -= s->linesize[p];
2260 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2261 for (index=0; index<4; index++) {
2262 uint8_t *dst = s->picture_ptr->data[index];
2263 int w = s->picture_ptr->width;
2264 int h = s->picture_ptr->height;
2265 if(index && index<3){
2266 w = FF_CEIL_RSHIFT(w, hshift);
2267 h = FF_CEIL_RSHIFT(h, vshift);
2270 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2271 for (i=0; i<h/2; i++) {
2273 FFSWAP(int, dst[j], dst2[j]);
2274 dst += s->picture_ptr->linesize[index];
2275 dst2 -= s->picture_ptr->linesize[index];
2280 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2281 int w = s->picture_ptr->width;
2282 int h = s->picture_ptr->height;
2283 for (i=0; i<h; i++) {
2286 for (index=0; index<4; index++) {
2287 dst[index] = s->picture_ptr->data[index]
2288 + s->picture_ptr->linesize[index]*i;
2290 for (j=0; j<w; j++) {
2292 int r = dst[0][j] * k;
2293 int g = dst[1][j] * k;
2294 int b = dst[2][j] * k;
2295 dst[0][j] = g*257 >> 16;
2296 dst[1][j] = b*257 >> 16;
2297 dst[2][j] = r*257 >> 16;
2302 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2303 int w = s->picture_ptr->width;
2304 int h = s->picture_ptr->height;
2305 for (i=0; i<h; i++) {
2308 for (index=0; index<4; index++) {
2309 dst[index] = s->picture_ptr->data[index]
2310 + s->picture_ptr->linesize[index]*i;
2312 for (j=0; j<w; j++) {
2314 int r = (255 - dst[0][j]) * k;
2315 int g = (128 - dst[1][j]) * k;
2316 int b = (128 - dst[2][j]) * k;
2317 dst[0][j] = r*257 >> 16;
2318 dst[1][j] = (g*257 >> 16) + 128;
2319 dst[2][j] = (b*257 >> 16) + 128;
2326 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2328 stereo->type = s->stereo3d->type;
2329 stereo->flags = s->stereo3d->flags;
2331 av_freep(&s->stereo3d);
2334 av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
2335 av_dict_free(&s->exif_metadata);
2337 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2339 // return buf_end - buf_ptr;
2340 return buf_ptr - buf;
2343 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2345 MJpegDecodeContext *s = avctx->priv_data;
2348 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2349 av_log(avctx, AV_LOG_INFO, "Single field\n");
2353 av_frame_free(&s->picture);
2354 s->picture_ptr = NULL;
2355 } else if (s->picture_ptr)
2356 av_frame_unref(s->picture_ptr);
2358 av_freep(&s->buffer);
2359 av_freep(&s->stereo3d);
2360 av_freep(&s->ljpeg_buffer);
2361 s->ljpeg_buffer_size = 0;
2363 for (i = 0; i < 3; i++) {
2364 for (j = 0; j < 4; j++)
2365 ff_free_vlc(&s->vlcs[i][j]);
2367 for (i = 0; i < MAX_COMPONENTS; i++) {
2368 av_freep(&s->blocks[i]);
2369 av_freep(&s->last_nnz[i]);
2371 av_dict_free(&s->exif_metadata);
2375 static void decode_flush(AVCodecContext *avctx)
2377 MJpegDecodeContext *s = avctx->priv_data;
2381 #if CONFIG_MJPEG_DECODER
2382 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2383 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2384 static const AVOption options[] = {
2385 { "extern_huff", "Use external huffman table.",
2386 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
2390 static const AVClass mjpegdec_class = {
2391 .class_name = "MJPEG decoder",
2392 .item_name = av_default_item_name,
2394 .version = LIBAVUTIL_VERSION_INT,
2397 AVCodec ff_mjpeg_decoder = {
2399 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2400 .type = AVMEDIA_TYPE_VIDEO,
2401 .id = AV_CODEC_ID_MJPEG,
2402 .priv_data_size = sizeof(MJpegDecodeContext),
2403 .init = ff_mjpeg_decode_init,
2404 .close = ff_mjpeg_decode_end,
2405 .decode = ff_mjpeg_decode_frame,
2406 .flush = decode_flush,
2407 .capabilities = CODEC_CAP_DR1,
2409 .priv_class = &mjpegdec_class,
2410 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
2413 #if CONFIG_THP_DECODER
2414 AVCodec ff_thp_decoder = {
2416 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2417 .type = AVMEDIA_TYPE_VIDEO,
2418 .id = AV_CODEC_ID_THP,
2419 .priv_data_size = sizeof(MJpegDecodeContext),
2420 .init = ff_mjpeg_decode_init,
2421 .close = ff_mjpeg_decode_end,
2422 .decode = ff_mjpeg_decode_frame,
2423 .flush = decode_flush,
2424 .capabilities = CODEC_CAP_DR1,
2426 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,