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;
167 int pr = get_bits(&s->gb, 4);
169 av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
170 return AVERROR_INVALIDDATA;
172 index = get_bits(&s->gb, 4);
175 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
176 /* read quant table */
177 for (i = 0; i < 64; i++) {
178 j = s->scantable.permutated[i];
179 s->quant_matrixes[index][j] = get_bits(&s->gb, pr ? 16 : 8);
182 // XXX FIXME finetune, and perhaps add dc too
183 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
184 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
185 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
186 index, s->qscale[index]);
192 /* decode huffman tables and build VLC decoders */
193 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
195 int len, index, i, class, n, v, code_max;
196 uint8_t bits_table[17];
197 uint8_t val_table[256];
200 len = get_bits(&s->gb, 16) - 2;
204 return AVERROR_INVALIDDATA;
205 class = get_bits(&s->gb, 4);
207 return AVERROR_INVALIDDATA;
208 index = get_bits(&s->gb, 4);
210 return AVERROR_INVALIDDATA;
212 for (i = 1; i <= 16; i++) {
213 bits_table[i] = get_bits(&s->gb, 8);
217 if (len < n || n > 256)
218 return AVERROR_INVALIDDATA;
221 for (i = 0; i < n; i++) {
222 v = get_bits(&s->gb, 8);
229 /* build VLC and flush previous vlc if present */
230 ff_free_vlc(&s->vlcs[class][index]);
231 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
232 class, index, code_max + 1);
233 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
234 code_max + 1, 0, class > 0)) < 0)
238 ff_free_vlc(&s->vlcs[2][index]);
239 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
240 code_max + 1, 0, 0)) < 0)
247 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
249 int len, nb_components, i, width, height, bits, ret;
251 int h_count[MAX_COMPONENTS] = { 0 };
252 int v_count[MAX_COMPONENTS] = { 0 };
255 memset(s->upscale_h, 0, sizeof(s->upscale_h));
256 memset(s->upscale_v, 0, sizeof(s->upscale_v));
258 /* XXX: verify len field validity */
259 len = get_bits(&s->gb, 16);
260 s->avctx->bits_per_raw_sample =
261 bits = get_bits(&s->gb, 8);
263 if (bits > 16 || bits < 1) {
264 av_log(s->avctx, AV_LOG_ERROR, "bits %d is invalid\n", bits);
265 return AVERROR_INVALIDDATA;
270 if (bits == 9 && !s->pegasus_rct)
271 s->rct = 1; // FIXME ugly
273 if(s->lossless && s->avctx->lowres){
274 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
278 height = get_bits(&s->gb, 16);
279 width = get_bits(&s->gb, 16);
281 if (s->avctx->codec_id == AV_CODEC_ID_AMV && (height&15))
282 avpriv_request_sample(s->avctx, "non mod 16 height AMV\n");
284 // HACK for odd_height.mov
285 if (s->interlaced && s->width == width && s->height == height + 1)
288 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
289 if (av_image_check_size(width, height, 0, s->avctx))
290 return AVERROR_INVALIDDATA;
292 nb_components = get_bits(&s->gb, 8);
293 if (nb_components <= 0 ||
294 nb_components > MAX_COMPONENTS)
296 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
297 if (nb_components != s->nb_components) {
298 av_log(s->avctx, AV_LOG_ERROR,
299 "nb_components changing in interlaced picture\n");
300 return AVERROR_INVALIDDATA;
303 if (s->ls && !(bits <= 8 || nb_components == 1)) {
304 avpriv_report_missing_feature(s->avctx,
305 "JPEG-LS that is not <= 8 "
306 "bits/component or 16-bit gray");
307 return AVERROR_PATCHWELCOME;
309 s->nb_components = nb_components;
312 for (i = 0; i < nb_components; i++) {
314 s->component_id[i] = get_bits(&s->gb, 8) - 1;
315 h_count[i] = get_bits(&s->gb, 4);
316 v_count[i] = get_bits(&s->gb, 4);
317 /* compute hmax and vmax (only used in interleaved case) */
318 if (h_count[i] > s->h_max)
319 s->h_max = h_count[i];
320 if (v_count[i] > s->v_max)
321 s->v_max = v_count[i];
322 s->quant_index[i] = get_bits(&s->gb, 8);
323 if (s->quant_index[i] >= 4) {
324 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
325 return AVERROR_INVALIDDATA;
327 if (!h_count[i] || !v_count[i]) {
328 av_log(s->avctx, AV_LOG_ERROR,
329 "Invalid sampling factor in component %d %d:%d\n",
330 i, h_count[i], v_count[i]);
331 return AVERROR_INVALIDDATA;
334 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
335 i, h_count[i], v_count[i],
336 s->component_id[i], s->quant_index[i]);
339 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
340 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
341 return AVERROR_PATCHWELCOME;
345 /* if different size, realloc/alloc picture */
346 if (width != s->width || height != s->height || bits != s->bits ||
347 memcmp(s->h_count, h_count, sizeof(h_count)) ||
348 memcmp(s->v_count, v_count, sizeof(v_count))) {
353 memcpy(s->h_count, h_count, sizeof(h_count));
354 memcpy(s->v_count, v_count, sizeof(v_count));
358 /* test interlaced mode */
359 if (s->first_picture &&
360 s->org_height != 0 &&
361 s->height < ((s->org_height * 3) / 4)) {
363 s->bottom_field = s->interlace_polarity;
364 s->picture_ptr->interlaced_frame = 1;
365 s->picture_ptr->top_field_first = !s->interlace_polarity;
369 ret = ff_set_dimensions(s->avctx, width, height);
373 s->first_picture = 0;
376 if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
377 if (s->progressive) {
378 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
379 return AVERROR_INVALIDDATA;
382 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
384 else if (!s->lossless)
386 /* XXX: not complete test ! */
387 pix_fmt_id = ((unsigned)s->h_count[0] << 28) | (s->v_count[0] << 24) |
388 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
389 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
390 (s->h_count[3] << 4) | s->v_count[3];
391 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
392 /* NOTE we do not allocate pictures large enough for the possible
393 * padding of h/v_count being 4 */
394 if (!(pix_fmt_id & 0xD0D0D0D0))
395 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
396 if (!(pix_fmt_id & 0x0D0D0D0D))
397 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
399 for (i = 0; i < 8; i++) {
400 int j = 6 + (i&1) - (i&6);
401 int is = (pix_fmt_id >> (4*i)) & 0xF;
402 int js = (pix_fmt_id >> (4*j)) & 0xF;
404 if (is == 1 && js != 2 && (i < 2 || i > 5))
405 js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
406 if (is == 1 && js != 2 && (i < 2 || i > 5))
407 js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
409 if (is == 1 && js == 2) {
410 if (i & 1) s->upscale_h[j/2] = 1;
411 else s->upscale_v[j/2] = 1;
415 switch (pix_fmt_id) {
418 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
420 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
421 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
423 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
424 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
425 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
428 av_assert0(s->nb_components == 3);
432 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
434 if (s->adobe_transform == 0 && s->bits <= 8) {
435 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
437 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
438 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
441 av_assert0(s->nb_components == 4);
445 if (s->adobe_transform == 0 && s->bits <= 8) {
446 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
447 s->upscale_v[1] = s->upscale_v[2] = 1;
448 s->upscale_h[1] = s->upscale_h[2] = 1;
449 } else if (s->adobe_transform == 2 && s->bits <= 8) {
450 s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
451 s->upscale_v[1] = s->upscale_v[2] = 1;
452 s->upscale_h[1] = s->upscale_h[2] = 1;
453 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
455 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
456 else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
457 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
459 av_assert0(s->nb_components == 4);
465 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
468 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
473 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
476 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
488 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
490 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
497 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
498 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
501 s->upscale_v[0] = s->upscale_v[1] = 1;
503 if (pix_fmt_id == 0x14111100)
504 s->upscale_v[1] = s->upscale_v[2] = 1;
505 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
508 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
512 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
513 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
516 s->upscale_h[0] = s->upscale_h[1] = 1;
518 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
519 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
520 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
526 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
527 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
528 s->upscale_h[1] = s->upscale_h[2] = 2;
532 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
535 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
540 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
541 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
542 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
543 if (pix_fmt_id == 0x42111100) {
546 s->upscale_h[1] = s->upscale_h[2] = 1;
547 } else if (pix_fmt_id == 0x24111100) {
550 s->upscale_v[1] = s->upscale_v[2] = 1;
554 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
557 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
561 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x bits:%d\n", pix_fmt_id, s->bits);
562 memset(s->upscale_h, 0, sizeof(s->upscale_h));
563 memset(s->upscale_v, 0, sizeof(s->upscale_v));
564 return AVERROR_PATCHWELCOME;
566 if ((AV_RB32(s->upscale_h) || AV_RB32(s->upscale_v)) && s->avctx->lowres) {
567 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
568 return AVERROR_PATCHWELCOME;
571 memset(s->upscale_h, 0, sizeof(s->upscale_h));
572 memset(s->upscale_v, 0, sizeof(s->upscale_v));
573 if (s->nb_components == 3) {
574 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
575 } else if (s->nb_components != 1) {
576 av_log(s->avctx, AV_LOG_ERROR, "Unsupported number of components %d\n", s->nb_components);
577 return AVERROR_PATCHWELCOME;
578 } else if (s->palette_index && s->bits <= 8)
579 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
580 else if (s->bits <= 8)
581 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
583 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
586 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
588 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
592 av_frame_unref(s->picture_ptr);
593 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
595 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
596 s->picture_ptr->key_frame = 1;
599 for (i = 0; i < 4; i++)
600 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
602 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
603 s->width, s->height, s->linesize[0], s->linesize[1],
604 s->interlaced, s->avctx->height);
606 if (len != (8 + (3 * nb_components)))
607 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
610 if (s->rgb && !s->lossless && !s->ls) {
611 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
612 return AVERROR_PATCHWELCOME;
615 /* totally blank picture as progressive JPEG will only add details to it */
616 if (s->progressive) {
617 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
618 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
619 for (i = 0; i < s->nb_components; i++) {
620 int size = bw * bh * s->h_count[i] * s->v_count[i];
621 av_freep(&s->blocks[i]);
622 av_freep(&s->last_nnz[i]);
623 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
624 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
625 if (!s->blocks[i] || !s->last_nnz[i])
626 return AVERROR(ENOMEM);
627 s->block_stride[i] = bw * s->h_count[i];
629 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
634 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
637 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
638 if (code < 0 || code > 16) {
639 av_log(s->avctx, AV_LOG_WARNING,
640 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
641 0, dc_index, &s->vlcs[0][dc_index]);
646 return get_xbits(&s->gb, code);
651 /* decode block and dequantize */
652 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
653 int dc_index, int ac_index, int16_t *quant_matrix)
655 int code, i, j, level, val;
658 val = mjpeg_decode_dc(s, dc_index);
659 if (val == 0xfffff) {
660 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
661 return AVERROR_INVALIDDATA;
663 val = val * quant_matrix[0] + s->last_dc[component];
664 s->last_dc[component] = val;
668 {OPEN_READER(re, &s->gb);
670 UPDATE_CACHE(re, &s->gb);
671 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
673 i += ((unsigned)code) >> 4;
676 if (code > MIN_CACHE_BITS - 16)
677 UPDATE_CACHE(re, &s->gb);
680 int cache = GET_CACHE(re, &s->gb);
681 int sign = (~cache) >> 31;
682 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
685 LAST_SKIP_BITS(re, &s->gb, code);
688 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
689 return AVERROR_INVALIDDATA;
691 j = s->scantable.permutated[i];
692 block[j] = level * quant_matrix[j];
695 CLOSE_READER(re, &s->gb);}
700 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
701 int component, int dc_index,
702 int16_t *quant_matrix, int Al)
705 s->bdsp.clear_block(block);
706 val = mjpeg_decode_dc(s, dc_index);
707 if (val == 0xfffff) {
708 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
709 return AVERROR_INVALIDDATA;
711 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
712 s->last_dc[component] = val;
717 /* decode block and dequantize - progressive JPEG version */
718 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
719 uint8_t *last_nnz, int ac_index,
720 int16_t *quant_matrix,
721 int ss, int se, int Al, int *EOBRUN)
723 int code, i, j, level, val, run;
731 OPEN_READER(re, &s->gb);
732 for (i = ss; ; i++) {
733 UPDATE_CACHE(re, &s->gb);
734 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
736 run = ((unsigned) code) >> 4;
740 if (code > MIN_CACHE_BITS - 16)
741 UPDATE_CACHE(re, &s->gb);
744 int cache = GET_CACHE(re, &s->gb);
745 int sign = (~cache) >> 31;
746 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
749 LAST_SKIP_BITS(re, &s->gb, code);
753 j = s->scantable.permutated[se];
754 block[j] = level * quant_matrix[j] << Al;
757 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
758 return AVERROR_INVALIDDATA;
760 j = s->scantable.permutated[i];
761 block[j] = level * quant_matrix[j] << Al;
763 if (run == 0xF) {// ZRL - skip 15 coefficients
766 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
767 return AVERROR_INVALIDDATA;
772 UPDATE_CACHE(re, &s->gb);
773 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
774 LAST_SKIP_BITS(re, &s->gb, run);
781 CLOSE_READER(re, &s->gb);
790 #define REFINE_BIT(j) { \
791 UPDATE_CACHE(re, &s->gb); \
792 sign = block[j] >> 15; \
793 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
794 ((quant_matrix[j] ^ sign) - sign) << Al; \
795 LAST_SKIP_BITS(re, &s->gb, 1); \
803 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
808 j = s->scantable.permutated[i]; \
811 else if (run-- == 0) \
815 /* decode block and dequantize - progressive JPEG refinement pass */
816 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
818 int ac_index, int16_t *quant_matrix,
819 int ss, int se, int Al, int *EOBRUN)
821 int code, i = ss, j, sign, val, run;
822 int last = FFMIN(se, *last_nnz);
824 OPEN_READER(re, &s->gb);
829 UPDATE_CACHE(re, &s->gb);
830 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
833 run = ((unsigned) code) >> 4;
834 UPDATE_CACHE(re, &s->gb);
835 val = SHOW_UBITS(re, &s->gb, 1);
836 LAST_SKIP_BITS(re, &s->gb, 1);
838 j = s->scantable.permutated[i];
840 block[j] = ((quant_matrix[j]^val) - val) << Al;
844 CLOSE_READER(re, &s->gb);
848 run = ((unsigned) code) >> 4;
855 UPDATE_CACHE(re, &s->gb);
856 run += SHOW_UBITS(re, &s->gb, val);
857 LAST_SKIP_BITS(re, &s->gb, val);
869 for (; i <= last; i++) {
870 j = s->scantable.permutated[i];
874 CLOSE_READER(re, &s->gb);
881 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
886 if (s->restart_interval) {
888 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
889 align_get_bits(&s->gb);
890 for (i = 0; i < nb_components; i++) /* reset dc */
891 s->last_dc[i] = (4 << s->bits);
894 i = 8 + ((-get_bits_count(&s->gb)) & 7);
896 if (s->restart_count == 0) {
897 if( show_bits(&s->gb, i) == (1 << i) - 1
898 || show_bits(&s->gb, i) == 0xFF) {
899 int pos = get_bits_count(&s->gb);
900 align_get_bits(&s->gb);
901 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
902 skip_bits(&s->gb, 8);
903 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
904 for (i = 0; i < nb_components; i++) /* reset dc */
905 s->last_dc[i] = (4 << s->bits);
908 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
915 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
918 uint16_t (*buffer)[4];
919 int left[4], top[4], topleft[4];
920 const int linesize = s->linesize[0];
921 const int mask = ((1 << s->bits) - 1) << point_transform;
925 if (s->nb_components != 3 && s->nb_components != 4)
926 return AVERROR_INVALIDDATA;
927 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
928 return AVERROR_INVALIDDATA;
931 s->restart_count = s->restart_interval;
933 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
934 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
935 buffer = s->ljpeg_buffer;
937 for (i = 0; i < 4; i++)
938 buffer[0][i] = 1 << (s->bits - 1);
940 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
941 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
943 if (s->interlaced && s->bottom_field)
944 ptr += linesize >> 1;
946 for (i = 0; i < 4; i++)
947 top[i] = left[i] = topleft[i] = buffer[0][i];
949 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
950 int modified_predictor = predictor;
952 if (s->restart_interval && !s->restart_count){
953 s->restart_count = s->restart_interval;
957 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
959 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
960 modified_predictor = 1;
962 for (i=0;i<nb_components;i++) {
966 top[i] = buffer[mb_x][i];
968 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
970 dc = mjpeg_decode_dc(s, s->dc_index[i]);
974 left[i] = buffer[mb_x][i] =
975 mask & (pred + (dc << point_transform));
978 if (s->restart_interval && !--s->restart_count) {
979 align_get_bits(&s->gb);
980 skip_bits(&s->gb, 16); /* skip RSTn */
983 if (s->nb_components == 4) {
984 for(i=0; i<nb_components; i++) {
985 int c= s->comp_index[i];
987 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
988 ptr[4*mb_x+3-c] = buffer[mb_x][i];
990 } else if(s->bits == 9) {
991 return AVERROR_PATCHWELCOME;
993 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
994 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
999 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1000 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1001 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1002 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1004 } else if (s->pegasus_rct) {
1005 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1006 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
1007 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1008 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1011 for(i=0; i<nb_components; i++) {
1012 int c= s->comp_index[i];
1014 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1015 ptr[3*mb_x+2-c] = buffer[mb_x][i];
1017 } else if(s->bits == 9) {
1018 return AVERROR_PATCHWELCOME;
1020 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1021 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
1030 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1031 int point_transform, int nb_components)
1033 int i, mb_x, mb_y, mask;
1034 int bits= (s->bits+7)&~7;
1035 int resync_mb_y = 0;
1036 int resync_mb_x = 0;
1038 point_transform += bits - s->bits;
1039 mask = ((1 << s->bits) - 1) << point_transform;
1041 av_assert0(nb_components>=1 && nb_components<=4);
1043 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1044 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1045 if (s->restart_interval && !s->restart_count){
1046 s->restart_count = s->restart_interval;
1051 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1052 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1053 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1054 for (i = 0; i < nb_components; i++) {
1057 int n, h, v, x, y, c, j, linesize;
1058 n = s->nb_blocks[i];
1059 c = s->comp_index[i];
1064 linesize= s->linesize[c];
1066 if(bits>8) linesize /= 2;
1068 for(j=0; j<n; j++) {
1071 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1075 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1077 if(x==0 && leftcol){
1078 pred= 1 << (bits - 1);
1083 if(x==0 && leftcol){
1084 pred= ptr[-linesize];
1086 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1090 if (s->interlaced && s->bottom_field)
1091 ptr += linesize >> 1;
1093 *ptr= pred + (dc << point_transform);
1095 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1097 if(x==0 && leftcol){
1098 pred= 1 << (bits - 1);
1103 if(x==0 && leftcol){
1104 pred= ptr16[-linesize];
1106 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1110 if (s->interlaced && s->bottom_field)
1111 ptr16 += linesize >> 1;
1113 *ptr16= pred + (dc << point_transform);
1122 for (i = 0; i < nb_components; i++) {
1125 int n, h, v, x, y, c, j, linesize, dc;
1126 n = s->nb_blocks[i];
1127 c = s->comp_index[i];
1132 linesize = s->linesize[c];
1134 if(bits>8) linesize /= 2;
1136 for (j = 0; j < n; j++) {
1139 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1143 ptr = s->picture_ptr->data[c] +
1144 (linesize * (v * mb_y + y)) +
1145 (h * mb_x + x); //FIXME optimize this crap
1146 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1149 *ptr = pred + (dc << point_transform);
1151 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1152 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1155 *ptr16= pred + (dc << point_transform);
1165 if (s->restart_interval && !--s->restart_count) {
1166 align_get_bits(&s->gb);
1167 skip_bits(&s->gb, 16); /* skip RSTn */
1174 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1175 uint8_t *dst, const uint8_t *src,
1176 int linesize, int lowres)
1179 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1181 case 1: copy_block4(dst, src, linesize, linesize, 4);
1183 case 2: copy_block2(dst, src, linesize, linesize, 2);
1185 case 3: *dst = *src;
1190 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1192 int block_x, block_y;
1193 int size = 8 >> s->avctx->lowres;
1195 for (block_y=0; block_y<size; block_y++)
1196 for (block_x=0; block_x<size; block_x++)
1197 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1199 for (block_y=0; block_y<size; block_y++)
1200 for (block_x=0; block_x<size; block_x++)
1201 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1205 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1206 int Al, const uint8_t *mb_bitmask,
1207 int mb_bitmask_size,
1208 const AVFrame *reference)
1211 uint8_t *data[MAX_COMPONENTS];
1212 const uint8_t *reference_data[MAX_COMPONENTS];
1213 int linesize[MAX_COMPONENTS];
1214 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1215 int bytes_per_pixel = 1 + (s->bits > 8);
1218 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1219 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1220 return AVERROR_INVALIDDATA;
1222 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1225 s->restart_count = 0;
1227 for (i = 0; i < nb_components; i++) {
1228 int c = s->comp_index[i];
1229 data[c] = s->picture_ptr->data[c];
1230 reference_data[c] = reference ? reference->data[c] : NULL;
1231 linesize[c] = s->linesize[c];
1232 s->coefs_finished[c] |= 1;
1235 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1236 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1237 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1239 if (s->restart_interval && !s->restart_count)
1240 s->restart_count = s->restart_interval;
1242 if (get_bits_left(&s->gb) < 0) {
1243 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1244 -get_bits_left(&s->gb));
1245 return AVERROR_INVALIDDATA;
1247 for (i = 0; i < nb_components; i++) {
1249 int n, h, v, x, y, c, j;
1251 n = s->nb_blocks[i];
1252 c = s->comp_index[i];
1257 for (j = 0; j < n; j++) {
1258 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1259 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1261 if (s->interlaced && s->bottom_field)
1262 block_offset += linesize[c] >> 1;
1263 if ( 8*(h * mb_x + x) < s->width
1264 && 8*(v * mb_y + y) < s->height) {
1265 ptr = data[c] + block_offset;
1268 if (!s->progressive) {
1271 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1272 linesize[c], s->avctx->lowres);
1275 s->bdsp.clear_block(s->block);
1276 if (decode_block(s, s->block, i,
1277 s->dc_index[i], s->ac_index[i],
1278 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1279 av_log(s->avctx, AV_LOG_ERROR,
1280 "error y=%d x=%d\n", mb_y, mb_x);
1281 return AVERROR_INVALIDDATA;
1284 s->idsp.idct_put(ptr, linesize[c], s->block);
1286 shift_output(s, ptr, linesize[c]);
1290 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1292 int16_t *block = s->blocks[c][block_idx];
1294 block[0] += get_bits1(&s->gb) *
1295 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1296 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1297 s->quant_matrixes[s->quant_sindex[i]],
1299 av_log(s->avctx, AV_LOG_ERROR,
1300 "error y=%d x=%d\n", mb_y, mb_x);
1301 return AVERROR_INVALIDDATA;
1304 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1305 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1306 mb_x, mb_y, x, y, c, s->bottom_field,
1307 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1315 handle_rstn(s, nb_components);
1321 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1322 int se, int Ah, int Al)
1326 int c = s->comp_index[0];
1327 uint8_t *data = s->picture_ptr->data[c];
1328 int linesize = s->linesize[c];
1330 int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1331 int bytes_per_pixel = 1 + (s->bits > 8);
1333 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1334 if (se < ss || se > 63) {
1335 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1336 return AVERROR_INVALIDDATA;
1340 // s->coefs_finished is a bitmask for coefficients coded
1341 // ss and se are parameters telling start and end coefficients
1342 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1343 last_scan = !~s->coefs_finished[c];
1346 if (s->interlaced && s->bottom_field)
1347 data += linesize >> 1;
1349 s->restart_count = 0;
1351 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1352 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1353 int block_idx = mb_y * s->block_stride[c];
1354 int16_t (*block)[64] = &s->blocks[c][block_idx];
1355 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1356 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1358 if (s->restart_interval && !s->restart_count)
1359 s->restart_count = s->restart_interval;
1362 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1363 quant_matrix, ss, se, Al, &EOBRUN);
1365 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1366 quant_matrix, ss, se, Al, &EOBRUN);
1368 av_log(s->avctx, AV_LOG_ERROR,
1369 "error y=%d x=%d\n", mb_y, mb_x);
1370 return AVERROR_INVALIDDATA;
1374 s->idsp.idct_put(ptr, linesize, *block);
1376 shift_output(s, ptr, linesize);
1377 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1379 if (handle_rstn(s, 0))
1386 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1387 int mb_bitmask_size, const AVFrame *reference)
1389 int len, nb_components, i, h, v, predictor, point_transform;
1391 const int block_size = s->lossless ? 1 : 8;
1392 int ilv, prev_shift;
1394 if (!s->got_picture) {
1395 av_log(s->avctx, AV_LOG_WARNING,
1396 "Can not process SOS before SOF, skipping\n");
1400 av_assert0(s->picture_ptr->data[0]);
1401 /* XXX: verify len field validity */
1402 len = get_bits(&s->gb, 16);
1403 nb_components = get_bits(&s->gb, 8);
1404 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1405 av_log(s->avctx, AV_LOG_ERROR,
1406 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1407 return AVERROR_PATCHWELCOME;
1409 if (len != 6 + 2 * nb_components) {
1410 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1411 return AVERROR_INVALIDDATA;
1413 for (i = 0; i < nb_components; i++) {
1414 id = get_bits(&s->gb, 8) - 1;
1415 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1416 /* find component index */
1417 for (index = 0; index < s->nb_components; index++)
1418 if (id == s->component_id[index])
1420 if (index == s->nb_components) {
1421 av_log(s->avctx, AV_LOG_ERROR,
1422 "decode_sos: index(%d) out of components\n", index);
1423 return AVERROR_INVALIDDATA;
1425 /* Metasoft MJPEG codec has Cb and Cr swapped */
1426 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1427 && nb_components == 3 && s->nb_components == 3 && i)
1430 s->quant_sindex[i] = s->quant_index[index];
1431 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1432 s->h_scount[i] = s->h_count[index];
1433 s->v_scount[i] = s->v_count[index];
1435 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1437 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1438 index = (index+2)%3;
1440 s->comp_index[i] = index;
1442 s->dc_index[i] = get_bits(&s->gb, 4);
1443 s->ac_index[i] = get_bits(&s->gb, 4);
1445 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1446 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1448 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))
1452 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1453 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1454 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1455 prev_shift = get_bits(&s->gb, 4); /* Ah */
1456 point_transform = get_bits(&s->gb, 4); /* Al */
1458 prev_shift = point_transform = 0;
1460 if (nb_components > 1) {
1461 /* interleaved stream */
1462 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1463 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1464 } else if (!s->ls) { /* skip this for JPEG-LS */
1465 h = s->h_max / s->h_scount[0];
1466 v = s->v_max / s->v_scount[0];
1467 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1468 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1469 s->nb_blocks[0] = 1;
1474 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1475 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1476 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1477 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1478 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1481 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1482 for (i = s->mjpb_skiptosod; i > 0; i--)
1483 skip_bits(&s->gb, 8);
1486 for (i = 0; i < nb_components; i++)
1487 s->last_dc[i] = (4 << s->bits);
1490 av_assert0(s->picture_ptr == s->picture);
1491 if (CONFIG_JPEGLS_DECODER && s->ls) {
1493 // reset_ls_coding_parameters(s, 0);
1495 if ((ret = ff_jpegls_decode_picture(s, predictor,
1496 point_transform, ilv)) < 0)
1500 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1503 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1505 nb_components)) < 0)
1510 if (s->progressive && predictor) {
1511 av_assert0(s->picture_ptr == s->picture);
1512 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1514 point_transform)) < 0)
1517 if ((ret = mjpeg_decode_scan(s, nb_components,
1518 prev_shift, point_transform,
1519 mb_bitmask, mb_bitmask_size, reference)) < 0)
1524 if (s->interlaced &&
1525 get_bits_left(&s->gb) > 32 &&
1526 show_bits(&s->gb, 8) == 0xFF) {
1527 GetBitContext bak = s->gb;
1528 align_get_bits(&bak);
1529 if (show_bits(&bak, 16) == 0xFFD1) {
1530 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1532 skip_bits(&s->gb, 16);
1533 s->bottom_field ^= 1;
1542 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1543 return AVERROR_INVALIDDATA;
1546 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1548 if (get_bits(&s->gb, 16) != 4)
1549 return AVERROR_INVALIDDATA;
1550 s->restart_interval = get_bits(&s->gb, 16);
1551 s->restart_count = 0;
1552 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1553 s->restart_interval);
1558 static int mjpeg_decode_app(MJpegDecodeContext *s)
1562 len = get_bits(&s->gb, 16);
1564 return AVERROR_INVALIDDATA;
1565 if (8 * len > get_bits_left(&s->gb))
1566 return AVERROR_INVALIDDATA;
1568 id = get_bits_long(&s->gb, 32);
1571 if (s->avctx->debug & FF_DEBUG_STARTCODE) {
1573 av_get_codec_tag_string(id_str, sizeof(id_str), av_bswap32(id));
1574 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n", id_str, id, len);
1577 /* Buggy AVID, it puts EOI only at every 10th frame. */
1578 /* Also, this fourcc is used by non-avid files too, it holds some
1579 information, but it's always present in AVID-created files. */
1580 if (id == AV_RB32("AVI1")) {
1586 4bytes field_size_less_padding
1589 i = get_bits(&s->gb, 8); len--;
1590 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1592 skip_bits(&s->gb, 8);
1593 skip_bits(&s->gb, 32);
1594 skip_bits(&s->gb, 32);
1602 if (id == AV_RB32("JFIF")) {
1603 int t_w, t_h, v1, v2;
1604 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1605 v1 = get_bits(&s->gb, 8);
1606 v2 = get_bits(&s->gb, 8);
1607 skip_bits(&s->gb, 8);
1609 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1610 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1611 ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
1613 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1614 av_log(s->avctx, AV_LOG_INFO,
1615 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1617 s->avctx->sample_aspect_ratio.num,
1618 s->avctx->sample_aspect_ratio.den);
1620 t_w = get_bits(&s->gb, 8);
1621 t_h = get_bits(&s->gb, 8);
1623 /* skip thumbnail */
1624 if (len -10 - (t_w * t_h * 3) > 0)
1625 len -= t_w * t_h * 3;
1631 if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1632 skip_bits(&s->gb, 16); /* version */
1633 skip_bits(&s->gb, 16); /* flags0 */
1634 skip_bits(&s->gb, 16); /* flags1 */
1635 s->adobe_transform = get_bits(&s->gb, 8);
1636 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1637 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1642 if (id == AV_RB32("LJIF")) {
1644 int pegasus_rct = s->pegasus_rct;
1645 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1646 av_log(s->avctx, AV_LOG_INFO,
1647 "Pegasus lossless jpeg header found\n");
1648 skip_bits(&s->gb, 16); /* version ? */
1649 skip_bits(&s->gb, 16); /* unknown always 0? */
1650 skip_bits(&s->gb, 16); /* unknown always 0? */
1651 skip_bits(&s->gb, 16); /* unknown always 0? */
1652 switch (i=get_bits(&s->gb, 8)) {
1662 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1667 if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
1668 av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
1673 s->pegasus_rct = pegasus_rct;
1677 if (id == AV_RL32("colr") && len > 0) {
1678 s->colr = get_bits(&s->gb, 8);
1679 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1680 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1684 if (id == AV_RL32("xfrm") && len > 0) {
1685 s->xfrm = get_bits(&s->gb, 8);
1686 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1687 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1692 /* JPS extension by VRex */
1693 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1694 int flags, layout, type;
1695 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1696 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1698 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1699 skip_bits(&s->gb, 16); len -= 2; /* block length */
1700 skip_bits(&s->gb, 8); /* reserved */
1701 flags = get_bits(&s->gb, 8);
1702 layout = get_bits(&s->gb, 8);
1703 type = get_bits(&s->gb, 8);
1706 s->stereo3d = av_stereo3d_alloc();
1711 s->stereo3d->type = AV_STEREO3D_2D;
1712 } else if (type == 1) {
1715 s->stereo3d->type = AV_STEREO3D_LINES;
1718 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1721 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1724 if (!(flags & 0x04)) {
1725 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1732 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1733 GetByteContext gbytes;
1734 int ret, le, ifd_offset, bytes_read;
1735 const uint8_t *aligned;
1737 skip_bits(&s->gb, 16); // skip padding
1740 // init byte wise reading
1741 aligned = align_get_bits(&s->gb);
1742 bytestream2_init(&gbytes, aligned, len);
1745 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1747 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1749 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1751 // read 0th IFD and store the metadata
1752 // (return values > 0 indicate the presence of subimage metadata)
1753 ret = avpriv_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1755 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1759 bytes_read = bytestream2_tell(&gbytes);
1760 skip_bits(&s->gb, bytes_read << 3);
1767 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1768 id = get_bits_long(&s->gb, 32);
1771 if (id == AV_RB32("mjpg")) {
1773 skip_bits(&s->gb, 32); /* field size */
1774 skip_bits(&s->gb, 32); /* pad field size */
1775 skip_bits(&s->gb, 32); /* next off */
1776 skip_bits(&s->gb, 32); /* quant off */
1777 skip_bits(&s->gb, 32); /* huff off */
1778 skip_bits(&s->gb, 32); /* image off */
1779 skip_bits(&s->gb, 32); /* scan off */
1780 skip_bits(&s->gb, 32); /* data off */
1782 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1783 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1788 /* slow but needed for extreme adobe jpegs */
1790 av_log(s->avctx, AV_LOG_ERROR,
1791 "mjpeg: error, decode_app parser read over the end\n");
1793 skip_bits(&s->gb, 8);
1798 static int mjpeg_decode_com(MJpegDecodeContext *s)
1800 int len = get_bits(&s->gb, 16);
1801 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1802 char *cbuf = av_malloc(len - 1);
1805 for (i = 0; i < len - 2; i++)
1806 cbuf[i] = get_bits(&s->gb, 8);
1807 if (i > 0 && cbuf[i - 1] == '\n')
1812 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1813 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1815 /* buggy avid, it puts EOI only at every 10th frame */
1816 if (!strncmp(cbuf, "AVID", 4)) {
1817 parse_avid(s, cbuf, len);
1818 } else if (!strcmp(cbuf, "CS=ITU601"))
1820 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
1821 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1831 /* return the 8 bit start code value and update the search
1832 state. Return -1 if no start code found */
1833 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1835 const uint8_t *buf_ptr;
1840 buf_ptr = *pbuf_ptr;
1841 while (buf_end - buf_ptr > 1) {
1844 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1853 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1854 *pbuf_ptr = buf_ptr;
1858 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1859 const uint8_t **buf_ptr, const uint8_t *buf_end,
1860 const uint8_t **unescaped_buf_ptr,
1861 int *unescaped_buf_size)
1864 start_code = find_marker(buf_ptr, buf_end);
1866 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1868 return AVERROR(ENOMEM);
1870 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1871 if (start_code == SOS && !s->ls) {
1872 const uint8_t *src = *buf_ptr;
1873 uint8_t *dst = s->buffer;
1875 while (src < buf_end) {
1876 uint8_t x = *(src++);
1879 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1881 while (src < buf_end && x == 0xff)
1884 if (x >= 0xd0 && x <= 0xd7)
1891 *unescaped_buf_ptr = s->buffer;
1892 *unescaped_buf_size = dst - s->buffer;
1893 memset(s->buffer + *unescaped_buf_size, 0,
1894 FF_INPUT_BUFFER_PADDING_SIZE);
1896 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
1897 (buf_end - *buf_ptr) - (dst - s->buffer));
1898 } else if (start_code == SOS && s->ls) {
1899 const uint8_t *src = *buf_ptr;
1900 uint8_t *dst = s->buffer;
1906 while (src + t < buf_end) {
1907 uint8_t x = src[t++];
1909 while ((src + t < buf_end) && x == 0xff)
1918 init_put_bits(&pb, dst, t);
1920 /* unescape bitstream */
1922 uint8_t x = src[b++];
1923 put_bits(&pb, 8, x);
1927 av_log(s->avctx, AV_LOG_WARNING, "Invalid escape sequence\n");
1930 put_bits(&pb, 7, x);
1934 flush_put_bits(&pb);
1936 *unescaped_buf_ptr = dst;
1937 *unescaped_buf_size = (bit_count + 7) >> 3;
1938 memset(s->buffer + *unescaped_buf_size, 0,
1939 FF_INPUT_BUFFER_PADDING_SIZE);
1941 *unescaped_buf_ptr = *buf_ptr;
1942 *unescaped_buf_size = buf_end - *buf_ptr;
1948 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1951 AVFrame *frame = data;
1952 const uint8_t *buf = avpkt->data;
1953 int buf_size = avpkt->size;
1954 MJpegDecodeContext *s = avctx->priv_data;
1955 const uint8_t *buf_end, *buf_ptr;
1956 const uint8_t *unescaped_buf_ptr;
1958 int unescaped_buf_size;
1964 av_dict_free(&s->exif_metadata);
1965 av_freep(&s->stereo3d);
1966 s->adobe_transform = -1;
1969 buf_end = buf + buf_size;
1970 while (buf_ptr < buf_end) {
1971 /* find start next marker */
1972 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1974 &unescaped_buf_size);
1976 if (start_code < 0) {
1978 } else if (unescaped_buf_size > INT_MAX / 8) {
1979 av_log(avctx, AV_LOG_ERROR,
1980 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1981 start_code, unescaped_buf_size, buf_size);
1982 return AVERROR_INVALIDDATA;
1984 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
1985 start_code, buf_end - buf_ptr);
1987 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
1990 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
1994 s->start_code = start_code;
1995 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1996 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1998 /* process markers */
1999 if (start_code >= 0xd0 && start_code <= 0xd7)
2000 av_log(avctx, AV_LOG_DEBUG,
2001 "restart marker: %d\n", start_code & 0x0f);
2003 else if (start_code >= APP0 && start_code <= APP15)
2004 mjpeg_decode_app(s);
2006 else if (start_code == COM)
2007 mjpeg_decode_com(s);
2011 if (!CONFIG_JPEGLS_DECODER &&
2012 (start_code == SOF48 || start_code == LSE)) {
2013 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
2014 return AVERROR(ENOSYS);
2017 switch (start_code) {
2019 s->restart_interval = 0;
2020 s->restart_count = 0;
2021 /* nothing to do on SOI */
2024 ff_mjpeg_decode_dqt(s);
2027 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
2028 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
2037 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2044 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2051 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2058 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2062 if (!CONFIG_JPEGLS_DECODER ||
2063 (ret = ff_jpegls_decode_lse(s)) < 0)
2069 if (!s->got_picture) {
2070 av_log(avctx, AV_LOG_WARNING,
2071 "Found EOI before any SOF, ignoring\n");
2074 if (s->interlaced) {
2075 s->bottom_field ^= 1;
2076 /* if not bottom field, do not output image yet */
2077 if (s->bottom_field == !s->interlace_polarity)
2080 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2086 int qp = FFMAX3(s->qscale[0],
2089 int qpw = (s->width + 15) / 16;
2090 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2092 memset(qp_table_buf->data, qp, qpw);
2093 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2096 if(avctx->debug & FF_DEBUG_QP)
2097 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2103 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2104 (avctx->err_recognition & AV_EF_EXPLODE))
2108 mjpeg_decode_dri(s);
2120 av_log(avctx, AV_LOG_ERROR,
2121 "mjpeg: unsupported coding type (%x)\n", start_code);
2125 /* eof process start code */
2126 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2127 av_log(avctx, AV_LOG_DEBUG,
2128 "marker parser used %d bytes (%d bits)\n",
2129 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2131 if (s->got_picture && s->cur_scan) {
2132 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2135 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2136 return AVERROR_INVALIDDATA;
2142 is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step_minus1;
2144 if (AV_RB32(s->upscale_h)) {
2146 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2147 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2148 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2149 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2150 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2151 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2152 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2153 avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2154 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2155 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2156 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2157 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2159 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2160 for (p = 0; p<4; p++) {
2161 uint8_t *line = s->picture_ptr->data[p];
2164 if (!s->upscale_h[p])
2167 w = FF_CEIL_RSHIFT(w, hshift);
2168 h = FF_CEIL_RSHIFT(h, vshift);
2170 if (s->upscale_v[p])
2173 for (i = 0; i < h; i++) {
2174 if (s->upscale_h[p] == 1) {
2175 if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2176 else line[w - 1] = line[(w - 1) / 2];
2177 for (index = w - 2; index > 0; index--) {
2179 ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2181 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2183 } else if (s->upscale_h[p] == 2) {
2185 ((uint16_t*)line)[w - 1] =
2186 ((uint16_t*)line)[w - 2] = ((uint16_t*)line)[(w - 1) / 3];
2189 line[w - 2] = line[(w - 1) / 3];
2191 for (index = w - 3; index > 0; index--) {
2192 line[index] = (line[index / 3] + line[(index + 1) / 3] + line[(index + 2) / 3] + 1) / 3;
2195 line += s->linesize[p];
2199 if (AV_RB32(s->upscale_v)) {
2201 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2202 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2203 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2204 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2205 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2206 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2207 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2208 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2209 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2210 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2211 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2212 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2213 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2215 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2216 for (p = 0; p < 4; p++) {
2220 if (!s->upscale_v[p])
2223 w = FF_CEIL_RSHIFT(w, hshift);
2224 h = FF_CEIL_RSHIFT(h, vshift);
2226 dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2227 for (i = h - 1; i; i--) {
2228 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2229 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2230 if (src1 == src2 || i == h - 1) {
2231 memcpy(dst, src1, w);
2233 for (index = 0; index < w; index++)
2234 dst[index] = (src1[index] + src2[index]) >> 1;
2236 dst -= s->linesize[p];
2242 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2243 for (index=0; index<4; index++) {
2244 uint8_t *dst = s->picture_ptr->data[index];
2245 int w = s->picture_ptr->width;
2246 int h = s->picture_ptr->height;
2247 if(index && index<3){
2248 w = FF_CEIL_RSHIFT(w, hshift);
2249 h = FF_CEIL_RSHIFT(h, vshift);
2252 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2253 for (i=0; i<h/2; i++) {
2255 FFSWAP(int, dst[j], dst2[j]);
2256 dst += s->picture_ptr->linesize[index];
2257 dst2 -= s->picture_ptr->linesize[index];
2262 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2263 int w = s->picture_ptr->width;
2264 int h = s->picture_ptr->height;
2265 for (i=0; i<h; i++) {
2268 for (index=0; index<4; index++) {
2269 dst[index] = s->picture_ptr->data[index]
2270 + s->picture_ptr->linesize[index]*i;
2272 for (j=0; j<w; j++) {
2274 int r = dst[0][j] * k;
2275 int g = dst[1][j] * k;
2276 int b = dst[2][j] * k;
2277 dst[0][j] = g*257 >> 16;
2278 dst[1][j] = b*257 >> 16;
2279 dst[2][j] = r*257 >> 16;
2284 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2285 int w = s->picture_ptr->width;
2286 int h = s->picture_ptr->height;
2287 for (i=0; i<h; i++) {
2290 for (index=0; index<4; index++) {
2291 dst[index] = s->picture_ptr->data[index]
2292 + s->picture_ptr->linesize[index]*i;
2294 for (j=0; j<w; j++) {
2296 int r = (255 - dst[0][j]) * k;
2297 int g = (128 - dst[1][j]) * k;
2298 int b = (128 - dst[2][j]) * k;
2299 dst[0][j] = r*257 >> 16;
2300 dst[1][j] = (g*257 >> 16) + 128;
2301 dst[2][j] = (b*257 >> 16) + 128;
2308 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2310 stereo->type = s->stereo3d->type;
2311 stereo->flags = s->stereo3d->flags;
2313 av_freep(&s->stereo3d);
2316 av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
2317 av_dict_free(&s->exif_metadata);
2319 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2321 // return buf_end - buf_ptr;
2322 return buf_ptr - buf;
2325 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2327 MJpegDecodeContext *s = avctx->priv_data;
2330 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2331 av_log(avctx, AV_LOG_INFO, "Single field\n");
2335 av_frame_free(&s->picture);
2336 s->picture_ptr = NULL;
2337 } else if (s->picture_ptr)
2338 av_frame_unref(s->picture_ptr);
2340 av_freep(&s->buffer);
2341 av_freep(&s->stereo3d);
2342 av_freep(&s->ljpeg_buffer);
2343 s->ljpeg_buffer_size = 0;
2345 for (i = 0; i < 3; i++) {
2346 for (j = 0; j < 4; j++)
2347 ff_free_vlc(&s->vlcs[i][j]);
2349 for (i = 0; i < MAX_COMPONENTS; i++) {
2350 av_freep(&s->blocks[i]);
2351 av_freep(&s->last_nnz[i]);
2353 av_dict_free(&s->exif_metadata);
2357 static void decode_flush(AVCodecContext *avctx)
2359 MJpegDecodeContext *s = avctx->priv_data;
2363 #if CONFIG_MJPEG_DECODER
2364 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2365 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2366 static const AVOption options[] = {
2367 { "extern_huff", "Use external huffman table.",
2368 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
2372 static const AVClass mjpegdec_class = {
2373 .class_name = "MJPEG decoder",
2374 .item_name = av_default_item_name,
2376 .version = LIBAVUTIL_VERSION_INT,
2379 AVCodec ff_mjpeg_decoder = {
2381 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2382 .type = AVMEDIA_TYPE_VIDEO,
2383 .id = AV_CODEC_ID_MJPEG,
2384 .priv_data_size = sizeof(MJpegDecodeContext),
2385 .init = ff_mjpeg_decode_init,
2386 .close = ff_mjpeg_decode_end,
2387 .decode = ff_mjpeg_decode_frame,
2388 .flush = decode_flush,
2389 .capabilities = CODEC_CAP_DR1,
2391 .priv_class = &mjpegdec_class,
2392 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
2395 #if CONFIG_THP_DECODER
2396 AVCodec ff_thp_decoder = {
2398 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2399 .type = AVMEDIA_TYPE_VIDEO,
2400 .id = AV_CODEC_ID_THP,
2401 .priv_data_size = sizeof(MJpegDecodeContext),
2402 .init = ff_mjpeg_decode_init,
2403 .close = ff_mjpeg_decode_end,
2404 .decode = ff_mjpeg_decode_frame,
2405 .flush = decode_flush,
2406 .capabilities = CODEC_CAP_DR1,
2408 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,