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->org_height != 0 &&
371 s->height < ((s->org_height * 3) / 4)) {
373 s->bottom_field = s->interlace_polarity;
374 s->picture_ptr->interlaced_frame = 1;
375 s->picture_ptr->top_field_first = !s->interlace_polarity;
379 ret = ff_set_dimensions(s->avctx, width, height);
383 s->first_picture = 0;
386 if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
387 if (s->progressive) {
388 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
389 return AVERROR_INVALIDDATA;
392 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
394 else if (!s->lossless)
396 /* XXX: not complete test ! */
397 pix_fmt_id = ((unsigned)s->h_count[0] << 28) | (s->v_count[0] << 24) |
398 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
399 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
400 (s->h_count[3] << 4) | s->v_count[3];
401 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
402 /* NOTE we do not allocate pictures large enough for the possible
403 * padding of h/v_count being 4 */
404 if (!(pix_fmt_id & 0xD0D0D0D0))
405 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
406 if (!(pix_fmt_id & 0x0D0D0D0D))
407 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
409 for (i = 0; i < 8; i++) {
410 int j = 6 + (i&1) - (i&6);
411 int is = (pix_fmt_id >> (4*i)) & 0xF;
412 int js = (pix_fmt_id >> (4*j)) & 0xF;
414 if (is == 1 && js != 2 && (i < 2 || i > 5))
415 js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
416 if (is == 1 && js != 2 && (i < 2 || i > 5))
417 js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
419 if (is == 1 && js == 2) {
420 if (i & 1) s->upscale_h[j/2] = 1;
421 else s->upscale_v[j/2] = 1;
425 switch (pix_fmt_id) {
428 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
430 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
431 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
433 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
434 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
435 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
438 av_assert0(s->nb_components == 3);
442 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
444 if (s->adobe_transform == 0 && s->bits <= 8) {
445 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
447 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
448 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
451 av_assert0(s->nb_components == 4);
455 if (s->adobe_transform == 0 && s->bits <= 8) {
456 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
457 s->upscale_v[1] = s->upscale_v[2] = 1;
458 s->upscale_h[1] = s->upscale_h[2] = 1;
459 } else if (s->adobe_transform == 2 && s->bits <= 8) {
460 s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
461 s->upscale_v[1] = s->upscale_v[2] = 1;
462 s->upscale_h[1] = s->upscale_h[2] = 1;
463 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
465 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
466 else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
467 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
469 av_assert0(s->nb_components == 4);
475 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
478 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
483 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
486 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
498 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
500 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
507 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
508 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
511 s->upscale_v[0] = s->upscale_v[1] = 1;
513 if (pix_fmt_id == 0x14111100)
514 s->upscale_v[1] = s->upscale_v[2] = 1;
515 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
518 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
522 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
523 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
526 s->upscale_h[0] = s->upscale_h[1] = 1;
528 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
529 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
530 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
536 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
537 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
538 s->upscale_h[1] = s->upscale_h[2] = 2;
542 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
545 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
550 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
551 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
552 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
553 if (pix_fmt_id == 0x42111100) {
556 s->upscale_h[1] = s->upscale_h[2] = 1;
557 } else if (pix_fmt_id == 0x24111100) {
560 s->upscale_v[1] = s->upscale_v[2] = 1;
564 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
567 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
571 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x bits:%d\n", pix_fmt_id, s->bits);
572 memset(s->upscale_h, 0, sizeof(s->upscale_h));
573 memset(s->upscale_v, 0, sizeof(s->upscale_v));
574 return AVERROR_PATCHWELCOME;
576 if ((AV_RB32(s->upscale_h) || AV_RB32(s->upscale_v)) && s->avctx->lowres) {
577 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
578 return AVERROR_PATCHWELCOME;
581 memset(s->upscale_h, 0, sizeof(s->upscale_h));
582 memset(s->upscale_v, 0, sizeof(s->upscale_v));
583 if (s->nb_components == 3) {
584 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
585 } else if (s->nb_components != 1) {
586 av_log(s->avctx, AV_LOG_ERROR, "Unsupported number of components %d\n", s->nb_components);
587 return AVERROR_PATCHWELCOME;
588 } else if (s->palette_index && s->bits <= 8)
589 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
590 else if (s->bits <= 8)
591 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
593 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
596 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
598 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
602 av_frame_unref(s->picture_ptr);
603 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
605 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
606 s->picture_ptr->key_frame = 1;
609 for (i = 0; i < 4; i++)
610 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
612 ff_dlog(s->avctx, "%d %d %d %d %d %d\n",
613 s->width, s->height, s->linesize[0], s->linesize[1],
614 s->interlaced, s->avctx->height);
616 if (len != (8 + (3 * nb_components)))
617 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
620 if (s->rgb && !s->lossless && !s->ls) {
621 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
622 return AVERROR_PATCHWELCOME;
625 /* totally blank picture as progressive JPEG will only add details to it */
626 if (s->progressive) {
627 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
628 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
629 for (i = 0; i < s->nb_components; i++) {
630 int size = bw * bh * s->h_count[i] * s->v_count[i];
631 av_freep(&s->blocks[i]);
632 av_freep(&s->last_nnz[i]);
633 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
634 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
635 if (!s->blocks[i] || !s->last_nnz[i])
636 return AVERROR(ENOMEM);
637 s->block_stride[i] = bw * s->h_count[i];
639 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
644 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
647 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
648 if (code < 0 || code > 16) {
649 av_log(s->avctx, AV_LOG_WARNING,
650 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
651 0, dc_index, &s->vlcs[0][dc_index]);
656 return get_xbits(&s->gb, code);
661 /* decode block and dequantize */
662 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
663 int dc_index, int ac_index, int16_t *quant_matrix)
665 int code, i, j, level, val;
668 val = mjpeg_decode_dc(s, dc_index);
669 if (val == 0xfffff) {
670 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
671 return AVERROR_INVALIDDATA;
673 val = val * quant_matrix[0] + s->last_dc[component];
674 s->last_dc[component] = val;
678 {OPEN_READER(re, &s->gb);
680 UPDATE_CACHE(re, &s->gb);
681 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
683 i += ((unsigned)code) >> 4;
686 if (code > MIN_CACHE_BITS - 16)
687 UPDATE_CACHE(re, &s->gb);
690 int cache = GET_CACHE(re, &s->gb);
691 int sign = (~cache) >> 31;
692 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
695 LAST_SKIP_BITS(re, &s->gb, code);
698 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
699 return AVERROR_INVALIDDATA;
701 j = s->scantable.permutated[i];
702 block[j] = level * quant_matrix[j];
705 CLOSE_READER(re, &s->gb);}
710 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
711 int component, int dc_index,
712 int16_t *quant_matrix, int Al)
715 s->bdsp.clear_block(block);
716 val = mjpeg_decode_dc(s, dc_index);
717 if (val == 0xfffff) {
718 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
719 return AVERROR_INVALIDDATA;
721 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
722 s->last_dc[component] = val;
727 /* decode block and dequantize - progressive JPEG version */
728 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
729 uint8_t *last_nnz, int ac_index,
730 int16_t *quant_matrix,
731 int ss, int se, int Al, int *EOBRUN)
733 int code, i, j, level, val, run;
741 OPEN_READER(re, &s->gb);
742 for (i = ss; ; i++) {
743 UPDATE_CACHE(re, &s->gb);
744 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
746 run = ((unsigned) code) >> 4;
750 if (code > MIN_CACHE_BITS - 16)
751 UPDATE_CACHE(re, &s->gb);
754 int cache = GET_CACHE(re, &s->gb);
755 int sign = (~cache) >> 31;
756 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
759 LAST_SKIP_BITS(re, &s->gb, code);
763 j = s->scantable.permutated[se];
764 block[j] = level * quant_matrix[j] << Al;
767 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
768 return AVERROR_INVALIDDATA;
770 j = s->scantable.permutated[i];
771 block[j] = level * quant_matrix[j] << Al;
773 if (run == 0xF) {// ZRL - skip 15 coefficients
776 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
777 return AVERROR_INVALIDDATA;
782 UPDATE_CACHE(re, &s->gb);
783 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
784 LAST_SKIP_BITS(re, &s->gb, run);
791 CLOSE_READER(re, &s->gb);
800 #define REFINE_BIT(j) { \
801 UPDATE_CACHE(re, &s->gb); \
802 sign = block[j] >> 15; \
803 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
804 ((quant_matrix[j] ^ sign) - sign) << Al; \
805 LAST_SKIP_BITS(re, &s->gb, 1); \
813 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
818 j = s->scantable.permutated[i]; \
821 else if (run-- == 0) \
825 /* decode block and dequantize - progressive JPEG refinement pass */
826 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
828 int ac_index, int16_t *quant_matrix,
829 int ss, int se, int Al, int *EOBRUN)
831 int code, i = ss, j, sign, val, run;
832 int last = FFMIN(se, *last_nnz);
834 OPEN_READER(re, &s->gb);
839 UPDATE_CACHE(re, &s->gb);
840 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
843 run = ((unsigned) code) >> 4;
844 UPDATE_CACHE(re, &s->gb);
845 val = SHOW_UBITS(re, &s->gb, 1);
846 LAST_SKIP_BITS(re, &s->gb, 1);
848 j = s->scantable.permutated[i];
850 block[j] = ((quant_matrix[j]^val) - val) << Al;
854 CLOSE_READER(re, &s->gb);
858 run = ((unsigned) code) >> 4;
865 UPDATE_CACHE(re, &s->gb);
866 run += SHOW_UBITS(re, &s->gb, val);
867 LAST_SKIP_BITS(re, &s->gb, val);
879 for (; i <= last; i++) {
880 j = s->scantable.permutated[i];
884 CLOSE_READER(re, &s->gb);
891 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
896 if (s->restart_interval) {
898 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
899 align_get_bits(&s->gb);
900 for (i = 0; i < nb_components; i++) /* reset dc */
901 s->last_dc[i] = (4 << s->bits);
904 i = 8 + ((-get_bits_count(&s->gb)) & 7);
906 if (s->restart_count == 0) {
907 if( show_bits(&s->gb, i) == (1 << i) - 1
908 || show_bits(&s->gb, i) == 0xFF) {
909 int pos = get_bits_count(&s->gb);
910 align_get_bits(&s->gb);
911 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
912 skip_bits(&s->gb, 8);
913 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
914 for (i = 0; i < nb_components; i++) /* reset dc */
915 s->last_dc[i] = (4 << s->bits);
918 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
925 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
928 uint16_t (*buffer)[4];
929 int left[4], top[4], topleft[4];
930 const int linesize = s->linesize[0];
931 const int mask = ((1 << s->bits) - 1) << point_transform;
935 if (s->nb_components != 3 && s->nb_components != 4)
936 return AVERROR_INVALIDDATA;
937 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
938 return AVERROR_INVALIDDATA;
941 s->restart_count = s->restart_interval;
943 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
944 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
945 buffer = s->ljpeg_buffer;
947 for (i = 0; i < 4; i++)
948 buffer[0][i] = 1 << (s->bits - 1);
950 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
951 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
953 if (s->interlaced && s->bottom_field)
954 ptr += linesize >> 1;
956 for (i = 0; i < 4; i++)
957 top[i] = left[i] = topleft[i] = buffer[0][i];
959 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
960 int modified_predictor = predictor;
962 if (s->restart_interval && !s->restart_count){
963 s->restart_count = s->restart_interval;
967 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
969 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
970 modified_predictor = 1;
972 for (i=0;i<nb_components;i++) {
976 top[i] = buffer[mb_x][i];
978 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
980 dc = mjpeg_decode_dc(s, s->dc_index[i]);
984 left[i] = buffer[mb_x][i] =
985 mask & (pred + (dc << point_transform));
988 if (s->restart_interval && !--s->restart_count) {
989 align_get_bits(&s->gb);
990 skip_bits(&s->gb, 16); /* skip RSTn */
993 if (s->nb_components == 4) {
994 for(i=0; i<nb_components; i++) {
995 int c= s->comp_index[i];
997 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
998 ptr[4*mb_x+3-c] = buffer[mb_x][i];
1000 } else if(s->bits == 9) {
1001 return AVERROR_PATCHWELCOME;
1003 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1004 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
1008 } else if (s->rct) {
1009 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1010 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1011 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1012 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1014 } else if (s->pegasus_rct) {
1015 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1016 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
1017 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1018 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1021 for(i=0; i<nb_components; i++) {
1022 int c= s->comp_index[i];
1024 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1025 ptr[3*mb_x+2-c] = buffer[mb_x][i];
1027 } else if(s->bits == 9) {
1028 return AVERROR_PATCHWELCOME;
1030 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1031 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
1040 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1041 int point_transform, int nb_components)
1043 int i, mb_x, mb_y, mask;
1044 int bits= (s->bits+7)&~7;
1045 int resync_mb_y = 0;
1046 int resync_mb_x = 0;
1048 point_transform += bits - s->bits;
1049 mask = ((1 << s->bits) - 1) << point_transform;
1051 av_assert0(nb_components>=1 && nb_components<=4);
1053 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1054 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1055 if (s->restart_interval && !s->restart_count){
1056 s->restart_count = s->restart_interval;
1061 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1062 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1063 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1064 for (i = 0; i < nb_components; i++) {
1067 int n, h, v, x, y, c, j, linesize;
1068 n = s->nb_blocks[i];
1069 c = s->comp_index[i];
1074 linesize= s->linesize[c];
1076 if(bits>8) linesize /= 2;
1078 for(j=0; j<n; j++) {
1081 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1085 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1087 if(x==0 && leftcol){
1088 pred= 1 << (bits - 1);
1093 if(x==0 && leftcol){
1094 pred= ptr[-linesize];
1096 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1100 if (s->interlaced && s->bottom_field)
1101 ptr += linesize >> 1;
1103 *ptr= pred + (dc << point_transform);
1105 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1107 if(x==0 && leftcol){
1108 pred= 1 << (bits - 1);
1113 if(x==0 && leftcol){
1114 pred= ptr16[-linesize];
1116 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1120 if (s->interlaced && s->bottom_field)
1121 ptr16 += linesize >> 1;
1123 *ptr16= pred + (dc << point_transform);
1132 for (i = 0; i < nb_components; i++) {
1135 int n, h, v, x, y, c, j, linesize, dc;
1136 n = s->nb_blocks[i];
1137 c = s->comp_index[i];
1142 linesize = s->linesize[c];
1144 if(bits>8) linesize /= 2;
1146 for (j = 0; j < n; j++) {
1149 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1153 ptr = s->picture_ptr->data[c] +
1154 (linesize * (v * mb_y + y)) +
1155 (h * mb_x + x); //FIXME optimize this crap
1156 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1159 *ptr = pred + (dc << point_transform);
1161 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1162 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1165 *ptr16= pred + (dc << point_transform);
1175 if (s->restart_interval && !--s->restart_count) {
1176 align_get_bits(&s->gb);
1177 skip_bits(&s->gb, 16); /* skip RSTn */
1184 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1185 uint8_t *dst, const uint8_t *src,
1186 int linesize, int lowres)
1189 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1191 case 1: copy_block4(dst, src, linesize, linesize, 4);
1193 case 2: copy_block2(dst, src, linesize, linesize, 2);
1195 case 3: *dst = *src;
1200 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1202 int block_x, block_y;
1203 int size = 8 >> s->avctx->lowres;
1205 for (block_y=0; block_y<size; block_y++)
1206 for (block_x=0; block_x<size; block_x++)
1207 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1209 for (block_y=0; block_y<size; block_y++)
1210 for (block_x=0; block_x<size; block_x++)
1211 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1215 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1216 int Al, const uint8_t *mb_bitmask,
1217 int mb_bitmask_size,
1218 const AVFrame *reference)
1221 uint8_t *data[MAX_COMPONENTS];
1222 const uint8_t *reference_data[MAX_COMPONENTS];
1223 int linesize[MAX_COMPONENTS];
1224 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1225 int bytes_per_pixel = 1 + (s->bits > 8);
1228 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1229 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1230 return AVERROR_INVALIDDATA;
1232 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1235 s->restart_count = 0;
1237 for (i = 0; i < nb_components; i++) {
1238 int c = s->comp_index[i];
1239 data[c] = s->picture_ptr->data[c];
1240 reference_data[c] = reference ? reference->data[c] : NULL;
1241 linesize[c] = s->linesize[c];
1242 s->coefs_finished[c] |= 1;
1245 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1246 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1247 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1249 if (s->restart_interval && !s->restart_count)
1250 s->restart_count = s->restart_interval;
1252 if (get_bits_left(&s->gb) < 0) {
1253 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1254 -get_bits_left(&s->gb));
1255 return AVERROR_INVALIDDATA;
1257 for (i = 0; i < nb_components; i++) {
1259 int n, h, v, x, y, c, j;
1261 n = s->nb_blocks[i];
1262 c = s->comp_index[i];
1267 for (j = 0; j < n; j++) {
1268 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1269 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1271 if (s->interlaced && s->bottom_field)
1272 block_offset += linesize[c] >> 1;
1273 if ( 8*(h * mb_x + x) < s->width
1274 && 8*(v * mb_y + y) < s->height) {
1275 ptr = data[c] + block_offset;
1278 if (!s->progressive) {
1281 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1282 linesize[c], s->avctx->lowres);
1285 s->bdsp.clear_block(s->block);
1286 if (decode_block(s, s->block, i,
1287 s->dc_index[i], s->ac_index[i],
1288 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1289 av_log(s->avctx, AV_LOG_ERROR,
1290 "error y=%d x=%d\n", mb_y, mb_x);
1291 return AVERROR_INVALIDDATA;
1294 s->idsp.idct_put(ptr, linesize[c], s->block);
1296 shift_output(s, ptr, linesize[c]);
1300 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1302 int16_t *block = s->blocks[c][block_idx];
1304 block[0] += get_bits1(&s->gb) *
1305 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1306 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1307 s->quant_matrixes[s->quant_sindex[i]],
1309 av_log(s->avctx, AV_LOG_ERROR,
1310 "error y=%d x=%d\n", mb_y, mb_x);
1311 return AVERROR_INVALIDDATA;
1314 ff_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1315 ff_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1316 mb_x, mb_y, x, y, c, s->bottom_field,
1317 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1325 handle_rstn(s, nb_components);
1331 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1332 int se, int Ah, int Al)
1336 int c = s->comp_index[0];
1337 uint8_t *data = s->picture_ptr->data[c];
1338 int linesize = s->linesize[c];
1340 int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1341 int bytes_per_pixel = 1 + (s->bits > 8);
1343 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1344 if (se < ss || se > 63) {
1345 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1346 return AVERROR_INVALIDDATA;
1350 // s->coefs_finished is a bitmask for coefficients coded
1351 // ss and se are parameters telling start and end coefficients
1352 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1353 last_scan = !~s->coefs_finished[c];
1356 if (s->interlaced && s->bottom_field)
1357 data += linesize >> 1;
1359 s->restart_count = 0;
1361 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1362 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1363 int block_idx = mb_y * s->block_stride[c];
1364 int16_t (*block)[64] = &s->blocks[c][block_idx];
1365 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1366 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1368 if (s->restart_interval && !s->restart_count)
1369 s->restart_count = s->restart_interval;
1372 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1373 quant_matrix, ss, se, Al, &EOBRUN);
1375 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1376 quant_matrix, ss, se, Al, &EOBRUN);
1378 av_log(s->avctx, AV_LOG_ERROR,
1379 "error y=%d x=%d\n", mb_y, mb_x);
1380 return AVERROR_INVALIDDATA;
1384 s->idsp.idct_put(ptr, linesize, *block);
1386 shift_output(s, ptr, linesize);
1387 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1389 if (handle_rstn(s, 0))
1396 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1397 int mb_bitmask_size, const AVFrame *reference)
1399 int len, nb_components, i, h, v, predictor, point_transform;
1401 const int block_size = s->lossless ? 1 : 8;
1402 int ilv, prev_shift;
1404 if (!s->got_picture) {
1405 av_log(s->avctx, AV_LOG_WARNING,
1406 "Can not process SOS before SOF, skipping\n");
1410 av_assert0(s->picture_ptr->data[0]);
1411 /* XXX: verify len field validity */
1412 len = get_bits(&s->gb, 16);
1413 nb_components = get_bits(&s->gb, 8);
1414 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1415 av_log(s->avctx, AV_LOG_ERROR,
1416 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1417 return AVERROR_PATCHWELCOME;
1419 if (len != 6 + 2 * nb_components) {
1420 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1421 return AVERROR_INVALIDDATA;
1423 for (i = 0; i < nb_components; i++) {
1424 id = get_bits(&s->gb, 8) - 1;
1425 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1426 /* find component index */
1427 for (index = 0; index < s->nb_components; index++)
1428 if (id == s->component_id[index])
1430 if (index == s->nb_components) {
1431 av_log(s->avctx, AV_LOG_ERROR,
1432 "decode_sos: index(%d) out of components\n", index);
1433 return AVERROR_INVALIDDATA;
1435 /* Metasoft MJPEG codec has Cb and Cr swapped */
1436 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1437 && nb_components == 3 && s->nb_components == 3 && i)
1440 s->quant_sindex[i] = s->quant_index[index];
1441 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1442 s->h_scount[i] = s->h_count[index];
1443 s->v_scount[i] = s->v_count[index];
1445 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1447 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1448 index = (index+2)%3;
1450 s->comp_index[i] = index;
1452 s->dc_index[i] = get_bits(&s->gb, 4);
1453 s->ac_index[i] = get_bits(&s->gb, 4);
1455 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1456 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1458 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))
1462 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1463 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1464 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1465 prev_shift = get_bits(&s->gb, 4); /* Ah */
1466 point_transform = get_bits(&s->gb, 4); /* Al */
1468 prev_shift = point_transform = 0;
1470 if (nb_components > 1) {
1471 /* interleaved stream */
1472 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1473 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1474 } else if (!s->ls) { /* skip this for JPEG-LS */
1475 h = s->h_max / s->h_scount[0];
1476 v = s->v_max / s->v_scount[0];
1477 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1478 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1479 s->nb_blocks[0] = 1;
1484 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1485 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1486 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1487 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1488 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1491 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1492 for (i = s->mjpb_skiptosod; i > 0; i--)
1493 skip_bits(&s->gb, 8);
1496 for (i = 0; i < nb_components; i++)
1497 s->last_dc[i] = (4 << s->bits);
1500 av_assert0(s->picture_ptr == s->picture);
1501 if (CONFIG_JPEGLS_DECODER && s->ls) {
1503 // reset_ls_coding_parameters(s, 0);
1505 if ((ret = ff_jpegls_decode_picture(s, predictor,
1506 point_transform, ilv)) < 0)
1510 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1513 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1515 nb_components)) < 0)
1520 if (s->progressive && predictor) {
1521 av_assert0(s->picture_ptr == s->picture);
1522 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1524 point_transform)) < 0)
1527 if ((ret = mjpeg_decode_scan(s, nb_components,
1528 prev_shift, point_transform,
1529 mb_bitmask, mb_bitmask_size, reference)) < 0)
1534 if (s->interlaced &&
1535 get_bits_left(&s->gb) > 32 &&
1536 show_bits(&s->gb, 8) == 0xFF) {
1537 GetBitContext bak = s->gb;
1538 align_get_bits(&bak);
1539 if (show_bits(&bak, 16) == 0xFFD1) {
1540 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1542 skip_bits(&s->gb, 16);
1543 s->bottom_field ^= 1;
1552 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1553 return AVERROR_INVALIDDATA;
1556 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1558 if (get_bits(&s->gb, 16) != 4)
1559 return AVERROR_INVALIDDATA;
1560 s->restart_interval = get_bits(&s->gb, 16);
1561 s->restart_count = 0;
1562 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1563 s->restart_interval);
1568 static int mjpeg_decode_app(MJpegDecodeContext *s)
1572 len = get_bits(&s->gb, 16);
1574 return AVERROR_INVALIDDATA;
1575 if (8 * len > get_bits_left(&s->gb))
1576 return AVERROR_INVALIDDATA;
1578 id = get_bits_long(&s->gb, 32);
1581 if (s->avctx->debug & FF_DEBUG_STARTCODE) {
1583 av_get_codec_tag_string(id_str, sizeof(id_str), av_bswap32(id));
1584 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n", id_str, id, len);
1587 /* Buggy AVID, it puts EOI only at every 10th frame. */
1588 /* Also, this fourcc is used by non-avid files too, it holds some
1589 information, but it's always present in AVID-created files. */
1590 if (id == AV_RB32("AVI1")) {
1596 4bytes field_size_less_padding
1599 i = get_bits(&s->gb, 8); len--;
1600 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1602 skip_bits(&s->gb, 8);
1603 skip_bits(&s->gb, 32);
1604 skip_bits(&s->gb, 32);
1612 if (id == AV_RB32("JFIF")) {
1613 int t_w, t_h, v1, v2;
1614 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1615 v1 = get_bits(&s->gb, 8);
1616 v2 = get_bits(&s->gb, 8);
1617 skip_bits(&s->gb, 8);
1619 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1620 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1621 ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
1623 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1624 av_log(s->avctx, AV_LOG_INFO,
1625 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1627 s->avctx->sample_aspect_ratio.num,
1628 s->avctx->sample_aspect_ratio.den);
1630 t_w = get_bits(&s->gb, 8);
1631 t_h = get_bits(&s->gb, 8);
1633 /* skip thumbnail */
1634 if (len -10 - (t_w * t_h * 3) > 0)
1635 len -= t_w * t_h * 3;
1641 if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1642 skip_bits(&s->gb, 16); /* version */
1643 skip_bits(&s->gb, 16); /* flags0 */
1644 skip_bits(&s->gb, 16); /* flags1 */
1645 s->adobe_transform = get_bits(&s->gb, 8);
1646 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1647 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1652 if (id == AV_RB32("LJIF")) {
1654 int pegasus_rct = s->pegasus_rct;
1655 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1656 av_log(s->avctx, AV_LOG_INFO,
1657 "Pegasus lossless jpeg header found\n");
1658 skip_bits(&s->gb, 16); /* version ? */
1659 skip_bits(&s->gb, 16); /* unknown always 0? */
1660 skip_bits(&s->gb, 16); /* unknown always 0? */
1661 skip_bits(&s->gb, 16); /* unknown always 0? */
1662 switch (i=get_bits(&s->gb, 8)) {
1672 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1677 if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
1678 av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
1683 s->pegasus_rct = pegasus_rct;
1687 if (id == AV_RL32("colr") && len > 0) {
1688 s->colr = get_bits(&s->gb, 8);
1689 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1690 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1694 if (id == AV_RL32("xfrm") && len > 0) {
1695 s->xfrm = get_bits(&s->gb, 8);
1696 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1697 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1702 /* JPS extension by VRex */
1703 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1704 int flags, layout, type;
1705 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1706 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1708 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1709 skip_bits(&s->gb, 16); len -= 2; /* block length */
1710 skip_bits(&s->gb, 8); /* reserved */
1711 flags = get_bits(&s->gb, 8);
1712 layout = get_bits(&s->gb, 8);
1713 type = get_bits(&s->gb, 8);
1716 s->stereo3d = av_stereo3d_alloc();
1721 s->stereo3d->type = AV_STEREO3D_2D;
1722 } else if (type == 1) {
1725 s->stereo3d->type = AV_STEREO3D_LINES;
1728 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1731 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1734 if (!(flags & 0x04)) {
1735 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1742 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1743 GetByteContext gbytes;
1744 int ret, le, ifd_offset, bytes_read;
1745 const uint8_t *aligned;
1747 skip_bits(&s->gb, 16); // skip padding
1750 // init byte wise reading
1751 aligned = align_get_bits(&s->gb);
1752 bytestream2_init(&gbytes, aligned, len);
1755 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1757 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1759 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1761 // read 0th IFD and store the metadata
1762 // (return values > 0 indicate the presence of subimage metadata)
1763 ret = avpriv_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1765 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1769 bytes_read = bytestream2_tell(&gbytes);
1770 skip_bits(&s->gb, bytes_read << 3);
1777 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1778 id = get_bits_long(&s->gb, 32);
1781 if (id == AV_RB32("mjpg")) {
1783 skip_bits(&s->gb, 32); /* field size */
1784 skip_bits(&s->gb, 32); /* pad field size */
1785 skip_bits(&s->gb, 32); /* next off */
1786 skip_bits(&s->gb, 32); /* quant off */
1787 skip_bits(&s->gb, 32); /* huff off */
1788 skip_bits(&s->gb, 32); /* image off */
1789 skip_bits(&s->gb, 32); /* scan off */
1790 skip_bits(&s->gb, 32); /* data off */
1792 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1793 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1798 /* slow but needed for extreme adobe jpegs */
1800 av_log(s->avctx, AV_LOG_ERROR,
1801 "mjpeg: error, decode_app parser read over the end\n");
1803 skip_bits(&s->gb, 8);
1808 static int mjpeg_decode_com(MJpegDecodeContext *s)
1810 int len = get_bits(&s->gb, 16);
1811 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1812 char *cbuf = av_malloc(len - 1);
1815 for (i = 0; i < len - 2; i++)
1816 cbuf[i] = get_bits(&s->gb, 8);
1817 if (i > 0 && cbuf[i - 1] == '\n')
1822 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1823 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1825 /* buggy avid, it puts EOI only at every 10th frame */
1826 if (!strncmp(cbuf, "AVID", 4)) {
1827 parse_avid(s, cbuf, len);
1828 } else if (!strcmp(cbuf, "CS=ITU601"))
1830 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
1831 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1841 /* return the 8 bit start code value and update the search
1842 state. Return -1 if no start code found */
1843 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1845 const uint8_t *buf_ptr;
1850 buf_ptr = *pbuf_ptr;
1851 while (buf_end - buf_ptr > 1) {
1854 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1863 ff_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1864 *pbuf_ptr = buf_ptr;
1868 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1869 const uint8_t **buf_ptr, const uint8_t *buf_end,
1870 const uint8_t **unescaped_buf_ptr,
1871 int *unescaped_buf_size)
1874 start_code = find_marker(buf_ptr, buf_end);
1876 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1878 return AVERROR(ENOMEM);
1880 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1881 if (start_code == SOS && !s->ls) {
1882 const uint8_t *src = *buf_ptr;
1883 uint8_t *dst = s->buffer;
1885 while (src < buf_end) {
1886 uint8_t x = *(src++);
1889 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1891 while (src < buf_end && x == 0xff)
1894 if (x >= 0xd0 && x <= 0xd7)
1901 *unescaped_buf_ptr = s->buffer;
1902 *unescaped_buf_size = dst - s->buffer;
1903 memset(s->buffer + *unescaped_buf_size, 0,
1904 FF_INPUT_BUFFER_PADDING_SIZE);
1906 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
1907 (buf_end - *buf_ptr) - (dst - s->buffer));
1908 } else if (start_code == SOS && s->ls) {
1909 const uint8_t *src = *buf_ptr;
1910 uint8_t *dst = s->buffer;
1916 while (src + t < buf_end) {
1917 uint8_t x = src[t++];
1919 while ((src + t < buf_end) && x == 0xff)
1928 init_put_bits(&pb, dst, t);
1930 /* unescape bitstream */
1932 uint8_t x = src[b++];
1933 put_bits(&pb, 8, x);
1937 av_log(s->avctx, AV_LOG_WARNING, "Invalid escape sequence\n");
1940 put_bits(&pb, 7, x);
1944 flush_put_bits(&pb);
1946 *unescaped_buf_ptr = dst;
1947 *unescaped_buf_size = (bit_count + 7) >> 3;
1948 memset(s->buffer + *unescaped_buf_size, 0,
1949 FF_INPUT_BUFFER_PADDING_SIZE);
1951 *unescaped_buf_ptr = *buf_ptr;
1952 *unescaped_buf_size = buf_end - *buf_ptr;
1958 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1961 AVFrame *frame = data;
1962 const uint8_t *buf = avpkt->data;
1963 int buf_size = avpkt->size;
1964 MJpegDecodeContext *s = avctx->priv_data;
1965 const uint8_t *buf_end, *buf_ptr;
1966 const uint8_t *unescaped_buf_ptr;
1968 int unescaped_buf_size;
1974 av_dict_free(&s->exif_metadata);
1975 av_freep(&s->stereo3d);
1976 s->adobe_transform = -1;
1979 buf_end = buf + buf_size;
1980 while (buf_ptr < buf_end) {
1981 /* find start next marker */
1982 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1984 &unescaped_buf_size);
1986 if (start_code < 0) {
1988 } else if (unescaped_buf_size > INT_MAX / 8) {
1989 av_log(avctx, AV_LOG_ERROR,
1990 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1991 start_code, unescaped_buf_size, buf_size);
1992 return AVERROR_INVALIDDATA;
1994 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
1995 start_code, buf_end - buf_ptr);
1997 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
2000 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
2004 s->start_code = start_code;
2005 if (s->avctx->debug & FF_DEBUG_STARTCODE)
2006 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
2008 /* process markers */
2009 if (start_code >= 0xd0 && start_code <= 0xd7)
2010 av_log(avctx, AV_LOG_DEBUG,
2011 "restart marker: %d\n", start_code & 0x0f);
2013 else if (start_code >= APP0 && start_code <= APP15)
2014 mjpeg_decode_app(s);
2016 else if (start_code == COM)
2017 mjpeg_decode_com(s);
2021 if (!CONFIG_JPEGLS_DECODER &&
2022 (start_code == SOF48 || start_code == LSE)) {
2023 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
2024 return AVERROR(ENOSYS);
2027 switch (start_code) {
2029 s->restart_interval = 0;
2030 s->restart_count = 0;
2031 /* nothing to do on SOI */
2034 ff_mjpeg_decode_dqt(s);
2037 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
2038 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
2047 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2054 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2061 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2068 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2072 if (!CONFIG_JPEGLS_DECODER ||
2073 (ret = ff_jpegls_decode_lse(s)) < 0)
2079 if (!s->got_picture) {
2080 av_log(avctx, AV_LOG_WARNING,
2081 "Found EOI before any SOF, ignoring\n");
2084 if (s->interlaced) {
2085 s->bottom_field ^= 1;
2086 /* if not bottom field, do not output image yet */
2087 if (s->bottom_field == !s->interlace_polarity)
2090 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2096 int qp = FFMAX3(s->qscale[0],
2099 int qpw = (s->width + 15) / 16;
2100 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2102 memset(qp_table_buf->data, qp, qpw);
2103 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2106 if(avctx->debug & FF_DEBUG_QP)
2107 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2113 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2114 (avctx->err_recognition & AV_EF_EXPLODE))
2118 mjpeg_decode_dri(s);
2130 av_log(avctx, AV_LOG_ERROR,
2131 "mjpeg: unsupported coding type (%x)\n", start_code);
2135 /* eof process start code */
2136 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2137 av_log(avctx, AV_LOG_DEBUG,
2138 "marker parser used %d bytes (%d bits)\n",
2139 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2141 if (s->got_picture && s->cur_scan) {
2142 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2145 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2146 return AVERROR_INVALIDDATA;
2152 is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step_minus1;
2154 if (AV_RB32(s->upscale_h)) {
2156 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2157 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2158 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2159 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2160 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2161 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2162 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2163 avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2164 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2165 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2166 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2167 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2169 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2170 for (p = 0; p<4; p++) {
2171 uint8_t *line = s->picture_ptr->data[p];
2174 if (!s->upscale_h[p])
2177 w = FF_CEIL_RSHIFT(w, hshift);
2178 h = FF_CEIL_RSHIFT(h, vshift);
2180 if (s->upscale_v[p])
2183 for (i = 0; i < h; i++) {
2184 if (s->upscale_h[p] == 1) {
2185 if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2186 else line[w - 1] = line[(w - 1) / 2];
2187 for (index = w - 2; index > 0; index--) {
2189 ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2191 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2193 } else if (s->upscale_h[p] == 2) {
2195 ((uint16_t*)line)[w - 1] =
2196 ((uint16_t*)line)[w - 2] = ((uint16_t*)line)[(w - 1) / 3];
2199 line[w - 2] = line[(w - 1) / 3];
2201 for (index = w - 3; index > 0; index--) {
2202 line[index] = (line[index / 3] + line[(index + 1) / 3] + line[(index + 2) / 3] + 1) / 3;
2205 line += s->linesize[p];
2209 if (AV_RB32(s->upscale_v)) {
2211 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2212 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2213 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2214 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2215 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2216 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2217 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2218 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2219 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2220 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2221 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2222 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2223 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2225 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2226 for (p = 0; p < 4; p++) {
2230 if (!s->upscale_v[p])
2233 w = FF_CEIL_RSHIFT(w, hshift);
2234 h = FF_CEIL_RSHIFT(h, vshift);
2236 dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2237 for (i = h - 1; i; i--) {
2238 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2239 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2240 if (src1 == src2 || i == h - 1) {
2241 memcpy(dst, src1, w);
2243 for (index = 0; index < w; index++)
2244 dst[index] = (src1[index] + src2[index]) >> 1;
2246 dst -= s->linesize[p];
2252 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2253 for (index=0; index<4; index++) {
2254 uint8_t *dst = s->picture_ptr->data[index];
2255 int w = s->picture_ptr->width;
2256 int h = s->picture_ptr->height;
2257 if(index && index<3){
2258 w = FF_CEIL_RSHIFT(w, hshift);
2259 h = FF_CEIL_RSHIFT(h, vshift);
2262 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2263 for (i=0; i<h/2; i++) {
2265 FFSWAP(int, dst[j], dst2[j]);
2266 dst += s->picture_ptr->linesize[index];
2267 dst2 -= s->picture_ptr->linesize[index];
2272 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2273 int w = s->picture_ptr->width;
2274 int h = s->picture_ptr->height;
2275 for (i=0; i<h; i++) {
2278 for (index=0; index<4; index++) {
2279 dst[index] = s->picture_ptr->data[index]
2280 + s->picture_ptr->linesize[index]*i;
2282 for (j=0; j<w; j++) {
2284 int r = dst[0][j] * k;
2285 int g = dst[1][j] * k;
2286 int b = dst[2][j] * k;
2287 dst[0][j] = g*257 >> 16;
2288 dst[1][j] = b*257 >> 16;
2289 dst[2][j] = r*257 >> 16;
2294 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2295 int w = s->picture_ptr->width;
2296 int h = s->picture_ptr->height;
2297 for (i=0; i<h; i++) {
2300 for (index=0; index<4; index++) {
2301 dst[index] = s->picture_ptr->data[index]
2302 + s->picture_ptr->linesize[index]*i;
2304 for (j=0; j<w; j++) {
2306 int r = (255 - dst[0][j]) * k;
2307 int g = (128 - dst[1][j]) * k;
2308 int b = (128 - dst[2][j]) * k;
2309 dst[0][j] = r*257 >> 16;
2310 dst[1][j] = (g*257 >> 16) + 128;
2311 dst[2][j] = (b*257 >> 16) + 128;
2318 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2320 stereo->type = s->stereo3d->type;
2321 stereo->flags = s->stereo3d->flags;
2323 av_freep(&s->stereo3d);
2326 av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
2327 av_dict_free(&s->exif_metadata);
2329 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2331 // return buf_end - buf_ptr;
2332 return buf_ptr - buf;
2335 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2337 MJpegDecodeContext *s = avctx->priv_data;
2340 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2341 av_log(avctx, AV_LOG_INFO, "Single field\n");
2345 av_frame_free(&s->picture);
2346 s->picture_ptr = NULL;
2347 } else if (s->picture_ptr)
2348 av_frame_unref(s->picture_ptr);
2350 av_freep(&s->buffer);
2351 av_freep(&s->stereo3d);
2352 av_freep(&s->ljpeg_buffer);
2353 s->ljpeg_buffer_size = 0;
2355 for (i = 0; i < 3; i++) {
2356 for (j = 0; j < 4; j++)
2357 ff_free_vlc(&s->vlcs[i][j]);
2359 for (i = 0; i < MAX_COMPONENTS; i++) {
2360 av_freep(&s->blocks[i]);
2361 av_freep(&s->last_nnz[i]);
2363 av_dict_free(&s->exif_metadata);
2367 static void decode_flush(AVCodecContext *avctx)
2369 MJpegDecodeContext *s = avctx->priv_data;
2373 #if CONFIG_MJPEG_DECODER
2374 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2375 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2376 static const AVOption options[] = {
2377 { "extern_huff", "Use external huffman table.",
2378 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
2382 static const AVClass mjpegdec_class = {
2383 .class_name = "MJPEG decoder",
2384 .item_name = av_default_item_name,
2386 .version = LIBAVUTIL_VERSION_INT,
2389 AVCodec ff_mjpeg_decoder = {
2391 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2392 .type = AVMEDIA_TYPE_VIDEO,
2393 .id = AV_CODEC_ID_MJPEG,
2394 .priv_data_size = sizeof(MJpegDecodeContext),
2395 .init = ff_mjpeg_decode_init,
2396 .close = ff_mjpeg_decode_end,
2397 .decode = ff_mjpeg_decode_frame,
2398 .flush = decode_flush,
2399 .capabilities = CODEC_CAP_DR1,
2401 .priv_class = &mjpegdec_class,
2402 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
2405 #if CONFIG_THP_DECODER
2406 AVCodec ff_thp_decoder = {
2408 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2409 .type = AVMEDIA_TYPE_VIDEO,
2410 .id = AV_CODEC_ID_THP,
2411 .priv_data_size = sizeof(MJpegDecodeContext),
2412 .init = ff_mjpeg_decode_init,
2413 .close = ff_mjpeg_decode_end,
2414 .decode = ff_mjpeg_decode_frame,
2415 .flush = decode_flush,
2416 .capabilities = CODEC_CAP_DR1,
2418 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,