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"
43 #include "jpeglsdec.h"
47 #include "bytestream.h"
50 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
51 const uint8_t *val_table, int nb_codes,
52 int use_static, int is_ac)
54 uint8_t huff_size[256] = { 0 };
55 uint16_t huff_code[256];
56 uint16_t huff_sym[256];
59 av_assert0(nb_codes <= 256);
61 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
63 for (i = 0; i < 256; i++)
64 huff_sym[i] = i + 16 * is_ac;
67 huff_sym[0] = 16 * 256;
69 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
70 huff_code, 2, 2, huff_sym, 2, 2, use_static);
73 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
75 build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
76 avpriv_mjpeg_val_dc, 12, 0, 0);
77 build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
78 avpriv_mjpeg_val_dc, 12, 0, 0);
79 build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
80 avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
81 build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
82 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
83 build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
84 avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
85 build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
86 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
89 static void parse_avid(MJpegDecodeContext *s, uint8_t *buf, int len)
92 if (len > 14 && buf[12] == 1) /* 1 - NTSC */
93 s->interlace_polarity = 1;
94 if (len > 14 && buf[12] == 2) /* 2 - PAL */
95 s->interlace_polarity = 0;
96 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
97 av_log(s->avctx, AV_LOG_INFO, "AVID: len:%d %d\n", len, len > 14 ? buf[12] : -1);
100 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
102 MJpegDecodeContext *s = avctx->priv_data;
104 if (!s->picture_ptr) {
105 s->picture = av_frame_alloc();
107 return AVERROR(ENOMEM);
108 s->picture_ptr = s->picture;
112 ff_blockdsp_init(&s->bdsp, avctx);
113 ff_hpeldsp_init(&s->hdsp, avctx->flags);
114 ff_idctdsp_init(&s->idsp, avctx);
115 ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
120 s->first_picture = 1;
122 s->org_height = avctx->coded_height;
123 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
124 avctx->colorspace = AVCOL_SPC_BT470BG;
126 build_basic_mjpeg_vlc(s);
128 if (s->extern_huff) {
129 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
130 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
131 if (ff_mjpeg_decode_dht(s)) {
132 av_log(avctx, AV_LOG_ERROR,
133 "error using external huffman table, switching back to internal\n");
134 build_basic_mjpeg_vlc(s);
137 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
138 s->interlace_polarity = 1; /* bottom field first */
139 av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
140 } else if (avctx->field_order == AV_FIELD_UNKNOWN) {
141 if (avctx->codec_tag == AV_RL32("MJPG"))
142 s->interlace_polarity = 1;
145 if ( avctx->extradata_size > 8
146 && AV_RL32(avctx->extradata) == 0x2C
147 && AV_RL32(avctx->extradata+4) == 0x18) {
148 parse_avid(s, avctx->extradata, avctx->extradata_size);
151 if (avctx->codec->id == AV_CODEC_ID_AMV)
158 /* quantize tables */
159 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
161 int len, index, i, j;
163 len = get_bits(&s->gb, 16) - 2;
166 int pr = get_bits(&s->gb, 4);
168 av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
169 return AVERROR_INVALIDDATA;
171 index = get_bits(&s->gb, 4);
174 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
175 /* read quant table */
176 for (i = 0; i < 64; i++) {
177 j = s->scantable.permutated[i];
178 s->quant_matrixes[index][j] = get_bits(&s->gb, pr ? 16 : 8);
181 // XXX FIXME finetune, and perhaps add dc too
182 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
183 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
184 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
185 index, s->qscale[index]);
191 /* decode huffman tables and build VLC decoders */
192 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
194 int len, index, i, class, n, v, code_max;
195 uint8_t bits_table[17];
196 uint8_t val_table[256];
199 len = get_bits(&s->gb, 16) - 2;
203 return AVERROR_INVALIDDATA;
204 class = get_bits(&s->gb, 4);
206 return AVERROR_INVALIDDATA;
207 index = get_bits(&s->gb, 4);
209 return AVERROR_INVALIDDATA;
211 for (i = 1; i <= 16; i++) {
212 bits_table[i] = get_bits(&s->gb, 8);
216 if (len < n || n > 256)
217 return AVERROR_INVALIDDATA;
220 for (i = 0; i < n; i++) {
221 v = get_bits(&s->gb, 8);
228 /* build VLC and flush previous vlc if present */
229 ff_free_vlc(&s->vlcs[class][index]);
230 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
231 class, index, code_max + 1);
232 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
233 code_max + 1, 0, class > 0)) < 0)
237 ff_free_vlc(&s->vlcs[2][index]);
238 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
239 code_max + 1, 0, 0)) < 0)
246 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
248 int len, nb_components, i, width, height, bits, ret;
250 int h_count[MAX_COMPONENTS] = { 0 };
251 int v_count[MAX_COMPONENTS] = { 0 };
254 memset(s->upscale_h, 0, sizeof(s->upscale_h));
255 memset(s->upscale_v, 0, sizeof(s->upscale_v));
257 /* XXX: verify len field validity */
258 len = get_bits(&s->gb, 16);
259 s->avctx->bits_per_raw_sample =
260 bits = get_bits(&s->gb, 8);
262 if (bits > 16 || bits < 1) {
263 av_log(s->avctx, AV_LOG_ERROR, "bits %d is invalid\n", bits);
264 return AVERROR_INVALIDDATA;
269 if (bits == 9 && !s->pegasus_rct)
270 s->rct = 1; // FIXME ugly
272 if(s->lossless && s->avctx->lowres){
273 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
277 height = get_bits(&s->gb, 16);
278 width = get_bits(&s->gb, 16);
280 if (s->avctx->codec_id == AV_CODEC_ID_AMV && (height&15))
281 avpriv_request_sample(s->avctx, "non mod 16 height AMV\n");
283 // HACK for odd_height.mov
284 if (s->interlaced && s->width == width && s->height == height + 1)
287 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
288 if (av_image_check_size(width, height, 0, s->avctx))
289 return AVERROR_INVALIDDATA;
291 nb_components = get_bits(&s->gb, 8);
292 if (nb_components <= 0 ||
293 nb_components > MAX_COMPONENTS)
295 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
296 if (nb_components != s->nb_components) {
297 av_log(s->avctx, AV_LOG_ERROR,
298 "nb_components changing in interlaced picture\n");
299 return AVERROR_INVALIDDATA;
302 if (s->ls && !(bits <= 8 || nb_components == 1)) {
303 avpriv_report_missing_feature(s->avctx,
304 "JPEG-LS that is not <= 8 "
305 "bits/component or 16-bit gray");
306 return AVERROR_PATCHWELCOME;
308 s->nb_components = nb_components;
311 for (i = 0; i < nb_components; i++) {
313 s->component_id[i] = get_bits(&s->gb, 8) - 1;
314 h_count[i] = get_bits(&s->gb, 4);
315 v_count[i] = get_bits(&s->gb, 4);
316 /* compute hmax and vmax (only used in interleaved case) */
317 if (h_count[i] > s->h_max)
318 s->h_max = h_count[i];
319 if (v_count[i] > s->v_max)
320 s->v_max = v_count[i];
321 s->quant_index[i] = get_bits(&s->gb, 8);
322 if (s->quant_index[i] >= 4) {
323 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
324 return AVERROR_INVALIDDATA;
326 if (!h_count[i] || !v_count[i]) {
327 av_log(s->avctx, AV_LOG_ERROR,
328 "Invalid sampling factor in component %d %d:%d\n",
329 i, h_count[i], v_count[i]);
330 return AVERROR_INVALIDDATA;
333 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
334 i, h_count[i], v_count[i],
335 s->component_id[i], s->quant_index[i]);
338 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
339 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
340 return AVERROR_PATCHWELCOME;
344 /* if different size, realloc/alloc picture */
345 if (width != s->width || height != s->height || bits != s->bits ||
346 memcmp(s->h_count, h_count, sizeof(h_count)) ||
347 memcmp(s->v_count, v_count, sizeof(v_count))) {
352 memcpy(s->h_count, h_count, sizeof(h_count));
353 memcpy(s->v_count, v_count, sizeof(v_count));
357 /* test interlaced mode */
358 if (s->first_picture &&
359 s->org_height != 0 &&
360 s->height < ((s->org_height * 3) / 4)) {
362 s->bottom_field = s->interlace_polarity;
363 s->picture_ptr->interlaced_frame = 1;
364 s->picture_ptr->top_field_first = !s->interlace_polarity;
368 ret = ff_set_dimensions(s->avctx, width, height);
372 s->first_picture = 0;
375 if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
376 if (s->progressive) {
377 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
378 return AVERROR_INVALIDDATA;
381 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
383 else if (!s->lossless)
385 /* XXX: not complete test ! */
386 pix_fmt_id = ((unsigned)s->h_count[0] << 28) | (s->v_count[0] << 24) |
387 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
388 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
389 (s->h_count[3] << 4) | s->v_count[3];
390 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
391 /* NOTE we do not allocate pictures large enough for the possible
392 * padding of h/v_count being 4 */
393 if (!(pix_fmt_id & 0xD0D0D0D0))
394 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
395 if (!(pix_fmt_id & 0x0D0D0D0D))
396 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
398 for (i = 0; i < 8; i++) {
399 int j = 6 + (i&1) - (i&6);
400 int is = (pix_fmt_id >> (4*i)) & 0xF;
401 int js = (pix_fmt_id >> (4*j)) & 0xF;
403 if (is == 1 && js != 2 && (i < 2 || i > 5))
404 js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
405 if (is == 1 && js != 2 && (i < 2 || i > 5))
406 js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
408 if (is == 1 && js == 2) {
409 if (i & 1) s->upscale_h[j/2] = 1;
410 else s->upscale_v[j/2] = 1;
414 switch (pix_fmt_id) {
417 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
419 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
420 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
422 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
423 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
424 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
427 av_assert0(s->nb_components == 3);
431 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
433 if (s->adobe_transform == 0 && s->bits <= 8) {
434 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
436 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
437 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
440 av_assert0(s->nb_components == 4);
444 if (s->adobe_transform == 0 && s->bits <= 8) {
445 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
446 s->upscale_v[1] = s->upscale_v[2] = 1;
447 s->upscale_h[1] = s->upscale_h[2] = 1;
448 } else if (s->adobe_transform == 2 && s->bits <= 8) {
449 s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
450 s->upscale_v[1] = s->upscale_v[2] = 1;
451 s->upscale_h[1] = s->upscale_h[2] = 1;
452 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
454 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
455 else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
456 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
458 av_assert0(s->nb_components == 4);
464 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
467 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
472 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
475 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
487 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
489 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
496 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
497 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
500 s->upscale_v[0] = s->upscale_v[1] = 1;
502 if (pix_fmt_id == 0x14111100)
503 s->upscale_v[1] = s->upscale_v[2] = 1;
504 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
507 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
511 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
512 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
515 s->upscale_h[0] = s->upscale_h[1] = 1;
517 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
518 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
519 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
525 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
526 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
527 s->upscale_h[1] = s->upscale_h[2] = 2;
531 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
534 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
539 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
540 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
541 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
542 if (pix_fmt_id == 0x42111100) {
545 s->upscale_h[1] = s->upscale_h[2] = 1;
546 } else if (pix_fmt_id == 0x24111100) {
549 s->upscale_v[1] = s->upscale_v[2] = 1;
553 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
556 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
560 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x bits:%d\n", pix_fmt_id, s->bits);
561 memset(s->upscale_h, 0, sizeof(s->upscale_h));
562 memset(s->upscale_v, 0, sizeof(s->upscale_v));
563 return AVERROR_PATCHWELCOME;
565 if ((AV_RB32(s->upscale_h) || AV_RB32(s->upscale_v)) && s->avctx->lowres) {
566 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
567 return AVERROR_PATCHWELCOME;
570 memset(s->upscale_h, 0, sizeof(s->upscale_h));
571 memset(s->upscale_v, 0, sizeof(s->upscale_v));
572 if (s->nb_components == 3) {
573 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
574 } else if (s->nb_components != 1) {
575 av_log(s->avctx, AV_LOG_ERROR, "Unsupported number of components %d\n", s->nb_components);
576 return AVERROR_PATCHWELCOME;
577 } else if (s->palette_index && s->bits <= 8)
578 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
579 else if (s->bits <= 8)
580 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
582 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
585 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
587 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
591 av_frame_unref(s->picture_ptr);
592 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
594 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
595 s->picture_ptr->key_frame = 1;
598 for (i = 0; i < 4; i++)
599 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
601 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
602 s->width, s->height, s->linesize[0], s->linesize[1],
603 s->interlaced, s->avctx->height);
605 if (len != (8 + (3 * nb_components)))
606 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
609 if (s->rgb && !s->lossless && !s->ls) {
610 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
611 return AVERROR_PATCHWELCOME;
614 /* totally blank picture as progressive JPEG will only add details to it */
615 if (s->progressive) {
616 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
617 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
618 for (i = 0; i < s->nb_components; i++) {
619 int size = bw * bh * s->h_count[i] * s->v_count[i];
620 av_freep(&s->blocks[i]);
621 av_freep(&s->last_nnz[i]);
622 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
623 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
624 if (!s->blocks[i] || !s->last_nnz[i])
625 return AVERROR(ENOMEM);
626 s->block_stride[i] = bw * s->h_count[i];
628 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
633 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
636 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
637 if (code < 0 || code > 16) {
638 av_log(s->avctx, AV_LOG_WARNING,
639 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
640 0, dc_index, &s->vlcs[0][dc_index]);
645 return get_xbits(&s->gb, code);
650 /* decode block and dequantize */
651 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
652 int dc_index, int ac_index, int16_t *quant_matrix)
654 int code, i, j, level, val;
657 val = mjpeg_decode_dc(s, dc_index);
658 if (val == 0xfffff) {
659 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
660 return AVERROR_INVALIDDATA;
662 val = val * quant_matrix[0] + s->last_dc[component];
663 s->last_dc[component] = val;
667 {OPEN_READER(re, &s->gb);
669 UPDATE_CACHE(re, &s->gb);
670 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
672 i += ((unsigned)code) >> 4;
675 if (code > MIN_CACHE_BITS - 16)
676 UPDATE_CACHE(re, &s->gb);
679 int cache = GET_CACHE(re, &s->gb);
680 int sign = (~cache) >> 31;
681 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
684 LAST_SKIP_BITS(re, &s->gb, code);
687 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
688 return AVERROR_INVALIDDATA;
690 j = s->scantable.permutated[i];
691 block[j] = level * quant_matrix[j];
694 CLOSE_READER(re, &s->gb);}
699 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
700 int component, int dc_index,
701 int16_t *quant_matrix, int Al)
704 s->bdsp.clear_block(block);
705 val = mjpeg_decode_dc(s, dc_index);
706 if (val == 0xfffff) {
707 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
708 return AVERROR_INVALIDDATA;
710 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
711 s->last_dc[component] = val;
716 /* decode block and dequantize - progressive JPEG version */
717 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
718 uint8_t *last_nnz, int ac_index,
719 int16_t *quant_matrix,
720 int ss, int se, int Al, int *EOBRUN)
722 int code, i, j, level, val, run;
730 OPEN_READER(re, &s->gb);
731 for (i = ss; ; i++) {
732 UPDATE_CACHE(re, &s->gb);
733 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
735 run = ((unsigned) code) >> 4;
739 if (code > MIN_CACHE_BITS - 16)
740 UPDATE_CACHE(re, &s->gb);
743 int cache = GET_CACHE(re, &s->gb);
744 int sign = (~cache) >> 31;
745 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
748 LAST_SKIP_BITS(re, &s->gb, code);
752 j = s->scantable.permutated[se];
753 block[j] = level * quant_matrix[j] << Al;
756 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
757 return AVERROR_INVALIDDATA;
759 j = s->scantable.permutated[i];
760 block[j] = level * quant_matrix[j] << Al;
762 if (run == 0xF) {// ZRL - skip 15 coefficients
765 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
766 return AVERROR_INVALIDDATA;
771 UPDATE_CACHE(re, &s->gb);
772 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
773 LAST_SKIP_BITS(re, &s->gb, run);
780 CLOSE_READER(re, &s->gb);
789 #define REFINE_BIT(j) { \
790 UPDATE_CACHE(re, &s->gb); \
791 sign = block[j] >> 15; \
792 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
793 ((quant_matrix[j] ^ sign) - sign) << Al; \
794 LAST_SKIP_BITS(re, &s->gb, 1); \
802 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
807 j = s->scantable.permutated[i]; \
810 else if (run-- == 0) \
814 /* decode block and dequantize - progressive JPEG refinement pass */
815 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
817 int ac_index, int16_t *quant_matrix,
818 int ss, int se, int Al, int *EOBRUN)
820 int code, i = ss, j, sign, val, run;
821 int last = FFMIN(se, *last_nnz);
823 OPEN_READER(re, &s->gb);
828 UPDATE_CACHE(re, &s->gb);
829 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
832 run = ((unsigned) code) >> 4;
833 UPDATE_CACHE(re, &s->gb);
834 val = SHOW_UBITS(re, &s->gb, 1);
835 LAST_SKIP_BITS(re, &s->gb, 1);
837 j = s->scantable.permutated[i];
839 block[j] = ((quant_matrix[j]^val) - val) << Al;
843 CLOSE_READER(re, &s->gb);
847 run = ((unsigned) code) >> 4;
854 UPDATE_CACHE(re, &s->gb);
855 run += SHOW_UBITS(re, &s->gb, val);
856 LAST_SKIP_BITS(re, &s->gb, val);
868 for (; i <= last; i++) {
869 j = s->scantable.permutated[i];
873 CLOSE_READER(re, &s->gb);
880 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
885 if (s->restart_interval) {
887 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
888 align_get_bits(&s->gb);
889 for (i = 0; i < nb_components; i++) /* reset dc */
890 s->last_dc[i] = (4 << s->bits);
893 i = 8 + ((-get_bits_count(&s->gb)) & 7);
895 if (s->restart_count == 0) {
896 if( show_bits(&s->gb, i) == (1 << i) - 1
897 || show_bits(&s->gb, i) == 0xFF) {
898 int pos = get_bits_count(&s->gb);
899 align_get_bits(&s->gb);
900 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
901 skip_bits(&s->gb, 8);
902 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
903 for (i = 0; i < nb_components; i++) /* reset dc */
904 s->last_dc[i] = (4 << s->bits);
907 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
914 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
917 uint16_t (*buffer)[4];
918 int left[4], top[4], topleft[4];
919 const int linesize = s->linesize[0];
920 const int mask = ((1 << s->bits) - 1) << point_transform;
924 if (s->nb_components != 3 && s->nb_components != 4)
925 return AVERROR_INVALIDDATA;
926 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
927 return AVERROR_INVALIDDATA;
930 s->restart_count = s->restart_interval;
932 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
933 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
934 buffer = s->ljpeg_buffer;
936 for (i = 0; i < 4; i++)
937 buffer[0][i] = 1 << (s->bits - 1);
939 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
940 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
942 if (s->interlaced && s->bottom_field)
943 ptr += linesize >> 1;
945 for (i = 0; i < 4; i++)
946 top[i] = left[i] = topleft[i] = buffer[0][i];
948 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
949 int modified_predictor = predictor;
951 if (s->restart_interval && !s->restart_count){
952 s->restart_count = s->restart_interval;
956 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
958 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
959 modified_predictor = 1;
961 for (i=0;i<nb_components;i++) {
965 top[i] = buffer[mb_x][i];
967 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
969 dc = mjpeg_decode_dc(s, s->dc_index[i]);
973 left[i] = buffer[mb_x][i] =
974 mask & (pred + (dc << point_transform));
977 if (s->restart_interval && !--s->restart_count) {
978 align_get_bits(&s->gb);
979 skip_bits(&s->gb, 16); /* skip RSTn */
982 if (s->nb_components == 4) {
983 for(i=0; i<nb_components; i++) {
984 int c= s->comp_index[i];
986 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
987 ptr[4*mb_x+3-c] = buffer[mb_x][i];
989 } else if(s->bits == 9) {
990 return AVERROR_PATCHWELCOME;
992 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
993 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
998 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
999 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1000 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1001 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1003 } else if (s->pegasus_rct) {
1004 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1005 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
1006 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1007 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1010 for(i=0; i<nb_components; i++) {
1011 int c= s->comp_index[i];
1013 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1014 ptr[3*mb_x+2-c] = buffer[mb_x][i];
1016 } else if(s->bits == 9) {
1017 return AVERROR_PATCHWELCOME;
1019 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1020 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
1029 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1030 int point_transform, int nb_components)
1032 int i, mb_x, mb_y, mask;
1033 int bits= (s->bits+7)&~7;
1034 int resync_mb_y = 0;
1035 int resync_mb_x = 0;
1037 point_transform += bits - s->bits;
1038 mask = ((1 << s->bits) - 1) << point_transform;
1040 av_assert0(nb_components>=1 && nb_components<=4);
1042 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1043 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1044 if (s->restart_interval && !s->restart_count){
1045 s->restart_count = s->restart_interval;
1050 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1051 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1052 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1053 for (i = 0; i < nb_components; i++) {
1056 int n, h, v, x, y, c, j, linesize;
1057 n = s->nb_blocks[i];
1058 c = s->comp_index[i];
1063 linesize= s->linesize[c];
1065 if(bits>8) linesize /= 2;
1067 for(j=0; j<n; j++) {
1070 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1074 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1076 if(x==0 && leftcol){
1077 pred= 1 << (bits - 1);
1082 if(x==0 && leftcol){
1083 pred= ptr[-linesize];
1085 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1089 if (s->interlaced && s->bottom_field)
1090 ptr += linesize >> 1;
1092 *ptr= pred + (dc << point_transform);
1094 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1096 if(x==0 && leftcol){
1097 pred= 1 << (bits - 1);
1102 if(x==0 && leftcol){
1103 pred= ptr16[-linesize];
1105 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1109 if (s->interlaced && s->bottom_field)
1110 ptr16 += linesize >> 1;
1112 *ptr16= pred + (dc << point_transform);
1121 for (i = 0; i < nb_components; i++) {
1124 int n, h, v, x, y, c, j, linesize, dc;
1125 n = s->nb_blocks[i];
1126 c = s->comp_index[i];
1131 linesize = s->linesize[c];
1133 if(bits>8) linesize /= 2;
1135 for (j = 0; j < n; j++) {
1138 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1142 ptr = s->picture_ptr->data[c] +
1143 (linesize * (v * mb_y + y)) +
1144 (h * mb_x + x); //FIXME optimize this crap
1145 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1148 *ptr = pred + (dc << point_transform);
1150 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1151 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1154 *ptr16= pred + (dc << point_transform);
1164 if (s->restart_interval && !--s->restart_count) {
1165 align_get_bits(&s->gb);
1166 skip_bits(&s->gb, 16); /* skip RSTn */
1173 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1174 uint8_t *dst, const uint8_t *src,
1175 int linesize, int lowres)
1178 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1180 case 1: copy_block4(dst, src, linesize, linesize, 4);
1182 case 2: copy_block2(dst, src, linesize, linesize, 2);
1184 case 3: *dst = *src;
1189 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1191 int block_x, block_y;
1192 int size = 8 >> s->avctx->lowres;
1194 for (block_y=0; block_y<size; block_y++)
1195 for (block_x=0; block_x<size; block_x++)
1196 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1198 for (block_y=0; block_y<size; block_y++)
1199 for (block_x=0; block_x<size; block_x++)
1200 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1204 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1205 int Al, const uint8_t *mb_bitmask,
1206 int mb_bitmask_size,
1207 const AVFrame *reference)
1210 uint8_t *data[MAX_COMPONENTS];
1211 const uint8_t *reference_data[MAX_COMPONENTS];
1212 int linesize[MAX_COMPONENTS];
1213 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1214 int bytes_per_pixel = 1 + (s->bits > 8);
1217 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1218 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1219 return AVERROR_INVALIDDATA;
1221 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1224 s->restart_count = 0;
1226 for (i = 0; i < nb_components; i++) {
1227 int c = s->comp_index[i];
1228 data[c] = s->picture_ptr->data[c];
1229 reference_data[c] = reference ? reference->data[c] : NULL;
1230 linesize[c] = s->linesize[c];
1231 s->coefs_finished[c] |= 1;
1234 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1235 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1236 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1238 if (s->restart_interval && !s->restart_count)
1239 s->restart_count = s->restart_interval;
1241 if (get_bits_left(&s->gb) < 0) {
1242 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1243 -get_bits_left(&s->gb));
1244 return AVERROR_INVALIDDATA;
1246 for (i = 0; i < nb_components; i++) {
1248 int n, h, v, x, y, c, j;
1250 n = s->nb_blocks[i];
1251 c = s->comp_index[i];
1256 for (j = 0; j < n; j++) {
1257 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1258 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1260 if (s->interlaced && s->bottom_field)
1261 block_offset += linesize[c] >> 1;
1262 if ( 8*(h * mb_x + x) < s->width
1263 && 8*(v * mb_y + y) < s->height) {
1264 ptr = data[c] + block_offset;
1267 if (!s->progressive) {
1270 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1271 linesize[c], s->avctx->lowres);
1274 s->bdsp.clear_block(s->block);
1275 if (decode_block(s, s->block, i,
1276 s->dc_index[i], s->ac_index[i],
1277 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1278 av_log(s->avctx, AV_LOG_ERROR,
1279 "error y=%d x=%d\n", mb_y, mb_x);
1280 return AVERROR_INVALIDDATA;
1283 s->idsp.idct_put(ptr, linesize[c], s->block);
1285 shift_output(s, ptr, linesize[c]);
1289 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1291 int16_t *block = s->blocks[c][block_idx];
1293 block[0] += get_bits1(&s->gb) *
1294 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1295 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1296 s->quant_matrixes[s->quant_sindex[i]],
1298 av_log(s->avctx, AV_LOG_ERROR,
1299 "error y=%d x=%d\n", mb_y, mb_x);
1300 return AVERROR_INVALIDDATA;
1303 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1304 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1305 mb_x, mb_y, x, y, c, s->bottom_field,
1306 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1314 handle_rstn(s, nb_components);
1320 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1321 int se, int Ah, int Al)
1325 int c = s->comp_index[0];
1326 uint8_t *data = s->picture_ptr->data[c];
1327 int linesize = s->linesize[c];
1329 int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1330 int bytes_per_pixel = 1 + (s->bits > 8);
1332 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1333 if (se < ss || se > 63) {
1334 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1335 return AVERROR_INVALIDDATA;
1339 // s->coefs_finished is a bitmask for coefficients coded
1340 // ss and se are parameters telling start and end coefficients
1341 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1342 last_scan = !~s->coefs_finished[c];
1345 if (s->interlaced && s->bottom_field)
1346 data += linesize >> 1;
1348 s->restart_count = 0;
1350 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1351 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1352 int block_idx = mb_y * s->block_stride[c];
1353 int16_t (*block)[64] = &s->blocks[c][block_idx];
1354 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1355 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1357 if (s->restart_interval && !s->restart_count)
1358 s->restart_count = s->restart_interval;
1361 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1362 quant_matrix, ss, se, Al, &EOBRUN);
1364 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1365 quant_matrix, ss, se, Al, &EOBRUN);
1367 av_log(s->avctx, AV_LOG_ERROR,
1368 "error y=%d x=%d\n", mb_y, mb_x);
1369 return AVERROR_INVALIDDATA;
1373 s->idsp.idct_put(ptr, linesize, *block);
1375 shift_output(s, ptr, linesize);
1376 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1378 if (handle_rstn(s, 0))
1385 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1386 int mb_bitmask_size, const AVFrame *reference)
1388 int len, nb_components, i, h, v, predictor, point_transform;
1390 const int block_size = s->lossless ? 1 : 8;
1391 int ilv, prev_shift;
1393 if (!s->got_picture) {
1394 av_log(s->avctx, AV_LOG_WARNING,
1395 "Can not process SOS before SOF, skipping\n");
1399 av_assert0(s->picture_ptr->data[0]);
1400 /* XXX: verify len field validity */
1401 len = get_bits(&s->gb, 16);
1402 nb_components = get_bits(&s->gb, 8);
1403 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1404 av_log(s->avctx, AV_LOG_ERROR,
1405 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1406 return AVERROR_PATCHWELCOME;
1408 if (len != 6 + 2 * nb_components) {
1409 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1410 return AVERROR_INVALIDDATA;
1412 for (i = 0; i < nb_components; i++) {
1413 id = get_bits(&s->gb, 8) - 1;
1414 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1415 /* find component index */
1416 for (index = 0; index < s->nb_components; index++)
1417 if (id == s->component_id[index])
1419 if (index == s->nb_components) {
1420 av_log(s->avctx, AV_LOG_ERROR,
1421 "decode_sos: index(%d) out of components\n", index);
1422 return AVERROR_INVALIDDATA;
1424 /* Metasoft MJPEG codec has Cb and Cr swapped */
1425 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1426 && nb_components == 3 && s->nb_components == 3 && i)
1429 s->quant_sindex[i] = s->quant_index[index];
1430 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1431 s->h_scount[i] = s->h_count[index];
1432 s->v_scount[i] = s->v_count[index];
1434 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1436 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1437 index = (index+2)%3;
1439 s->comp_index[i] = index;
1441 s->dc_index[i] = get_bits(&s->gb, 4);
1442 s->ac_index[i] = get_bits(&s->gb, 4);
1444 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1445 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1447 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))
1451 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1452 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1453 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1454 prev_shift = get_bits(&s->gb, 4); /* Ah */
1455 point_transform = get_bits(&s->gb, 4); /* Al */
1457 prev_shift = point_transform = 0;
1459 if (nb_components > 1) {
1460 /* interleaved stream */
1461 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1462 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1463 } else if (!s->ls) { /* skip this for JPEG-LS */
1464 h = s->h_max / s->h_scount[0];
1465 v = s->v_max / s->v_scount[0];
1466 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1467 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1468 s->nb_blocks[0] = 1;
1473 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1474 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1475 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1476 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1477 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1480 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1481 for (i = s->mjpb_skiptosod; i > 0; i--)
1482 skip_bits(&s->gb, 8);
1485 for (i = 0; i < nb_components; i++)
1486 s->last_dc[i] = (4 << s->bits);
1489 av_assert0(s->picture_ptr == s->picture);
1490 if (CONFIG_JPEGLS_DECODER && s->ls) {
1492 // reset_ls_coding_parameters(s, 0);
1494 if ((ret = ff_jpegls_decode_picture(s, predictor,
1495 point_transform, ilv)) < 0)
1499 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1502 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1504 nb_components)) < 0)
1509 if (s->progressive && predictor) {
1510 av_assert0(s->picture_ptr == s->picture);
1511 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1513 point_transform)) < 0)
1516 if ((ret = mjpeg_decode_scan(s, nb_components,
1517 prev_shift, point_transform,
1518 mb_bitmask, mb_bitmask_size, reference)) < 0)
1523 if (s->interlaced &&
1524 get_bits_left(&s->gb) > 32 &&
1525 show_bits(&s->gb, 8) == 0xFF) {
1526 GetBitContext bak = s->gb;
1527 align_get_bits(&bak);
1528 if (show_bits(&bak, 16) == 0xFFD1) {
1529 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1531 skip_bits(&s->gb, 16);
1532 s->bottom_field ^= 1;
1541 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1542 return AVERROR_INVALIDDATA;
1545 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1547 if (get_bits(&s->gb, 16) != 4)
1548 return AVERROR_INVALIDDATA;
1549 s->restart_interval = get_bits(&s->gb, 16);
1550 s->restart_count = 0;
1551 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1552 s->restart_interval);
1557 static int mjpeg_decode_app(MJpegDecodeContext *s)
1561 len = get_bits(&s->gb, 16);
1563 return AVERROR_INVALIDDATA;
1564 if (8 * len > get_bits_left(&s->gb))
1565 return AVERROR_INVALIDDATA;
1567 id = get_bits_long(&s->gb, 32);
1570 if (s->avctx->debug & FF_DEBUG_STARTCODE) {
1572 av_get_codec_tag_string(id_str, sizeof(id_str), av_bswap32(id));
1573 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n", id_str, id, len);
1576 /* Buggy AVID, it puts EOI only at every 10th frame. */
1577 /* Also, this fourcc is used by non-avid files too, it holds some
1578 information, but it's always present in AVID-created files. */
1579 if (id == AV_RB32("AVI1")) {
1585 4bytes field_size_less_padding
1588 i = get_bits(&s->gb, 8); len--;
1589 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1591 skip_bits(&s->gb, 8);
1592 skip_bits(&s->gb, 32);
1593 skip_bits(&s->gb, 32);
1601 if (id == AV_RB32("JFIF")) {
1602 int t_w, t_h, v1, v2;
1603 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1604 v1 = get_bits(&s->gb, 8);
1605 v2 = get_bits(&s->gb, 8);
1606 skip_bits(&s->gb, 8);
1608 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1609 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1610 ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
1612 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1613 av_log(s->avctx, AV_LOG_INFO,
1614 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1616 s->avctx->sample_aspect_ratio.num,
1617 s->avctx->sample_aspect_ratio.den);
1619 t_w = get_bits(&s->gb, 8);
1620 t_h = get_bits(&s->gb, 8);
1622 /* skip thumbnail */
1623 if (len -10 - (t_w * t_h * 3) > 0)
1624 len -= t_w * t_h * 3;
1630 if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1631 skip_bits(&s->gb, 16); /* version */
1632 skip_bits(&s->gb, 16); /* flags0 */
1633 skip_bits(&s->gb, 16); /* flags1 */
1634 s->adobe_transform = get_bits(&s->gb, 8);
1635 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1636 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1641 if (id == AV_RB32("LJIF")) {
1643 int pegasus_rct = s->pegasus_rct;
1644 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1645 av_log(s->avctx, AV_LOG_INFO,
1646 "Pegasus lossless jpeg header found\n");
1647 skip_bits(&s->gb, 16); /* version ? */
1648 skip_bits(&s->gb, 16); /* unknown always 0? */
1649 skip_bits(&s->gb, 16); /* unknown always 0? */
1650 skip_bits(&s->gb, 16); /* unknown always 0? */
1651 switch (i=get_bits(&s->gb, 8)) {
1661 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1666 if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
1667 av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
1672 s->pegasus_rct = pegasus_rct;
1676 if (id == AV_RL32("colr") && len > 0) {
1677 s->colr = get_bits(&s->gb, 8);
1678 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1679 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1683 if (id == AV_RL32("xfrm") && len > 0) {
1684 s->xfrm = get_bits(&s->gb, 8);
1685 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1686 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1691 /* JPS extension by VRex */
1692 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1693 int flags, layout, type;
1694 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1695 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1697 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1698 skip_bits(&s->gb, 16); len -= 2; /* block length */
1699 skip_bits(&s->gb, 8); /* reserved */
1700 flags = get_bits(&s->gb, 8);
1701 layout = get_bits(&s->gb, 8);
1702 type = get_bits(&s->gb, 8);
1705 s->stereo3d = av_stereo3d_alloc();
1710 s->stereo3d->type = AV_STEREO3D_2D;
1711 } else if (type == 1) {
1714 s->stereo3d->type = AV_STEREO3D_LINES;
1717 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1720 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1723 if (!(flags & 0x04)) {
1724 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1731 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1732 GetByteContext gbytes;
1733 int ret, le, ifd_offset, bytes_read;
1734 const uint8_t *aligned;
1736 skip_bits(&s->gb, 16); // skip padding
1739 // init byte wise reading
1740 aligned = align_get_bits(&s->gb);
1741 bytestream2_init(&gbytes, aligned, len);
1744 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1746 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1748 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1750 // read 0th IFD and store the metadata
1751 // (return values > 0 indicate the presence of subimage metadata)
1752 ret = avpriv_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1754 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1758 bytes_read = bytestream2_tell(&gbytes);
1759 skip_bits(&s->gb, bytes_read << 3);
1766 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1767 id = get_bits_long(&s->gb, 32);
1770 if (id == AV_RB32("mjpg")) {
1772 skip_bits(&s->gb, 32); /* field size */
1773 skip_bits(&s->gb, 32); /* pad field size */
1774 skip_bits(&s->gb, 32); /* next off */
1775 skip_bits(&s->gb, 32); /* quant off */
1776 skip_bits(&s->gb, 32); /* huff off */
1777 skip_bits(&s->gb, 32); /* image off */
1778 skip_bits(&s->gb, 32); /* scan off */
1779 skip_bits(&s->gb, 32); /* data off */
1781 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1782 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1787 /* slow but needed for extreme adobe jpegs */
1789 av_log(s->avctx, AV_LOG_ERROR,
1790 "mjpeg: error, decode_app parser read over the end\n");
1792 skip_bits(&s->gb, 8);
1797 static int mjpeg_decode_com(MJpegDecodeContext *s)
1799 int len = get_bits(&s->gb, 16);
1800 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1801 char *cbuf = av_malloc(len - 1);
1804 for (i = 0; i < len - 2; i++)
1805 cbuf[i] = get_bits(&s->gb, 8);
1806 if (i > 0 && cbuf[i - 1] == '\n')
1811 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1812 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1814 /* buggy avid, it puts EOI only at every 10th frame */
1815 if (!strncmp(cbuf, "AVID", 4)) {
1816 parse_avid(s, cbuf, len);
1817 } else if (!strcmp(cbuf, "CS=ITU601"))
1819 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
1820 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1830 /* return the 8 bit start code value and update the search
1831 state. Return -1 if no start code found */
1832 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1834 const uint8_t *buf_ptr;
1839 buf_ptr = *pbuf_ptr;
1840 while (buf_end - buf_ptr > 1) {
1843 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1852 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1853 *pbuf_ptr = buf_ptr;
1857 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1858 const uint8_t **buf_ptr, const uint8_t *buf_end,
1859 const uint8_t **unescaped_buf_ptr,
1860 int *unescaped_buf_size)
1863 start_code = find_marker(buf_ptr, buf_end);
1865 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1867 return AVERROR(ENOMEM);
1869 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1870 if (start_code == SOS && !s->ls) {
1871 const uint8_t *src = *buf_ptr;
1872 uint8_t *dst = s->buffer;
1874 while (src < buf_end) {
1875 uint8_t x = *(src++);
1878 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1880 while (src < buf_end && x == 0xff)
1883 if (x >= 0xd0 && x <= 0xd7)
1890 *unescaped_buf_ptr = s->buffer;
1891 *unescaped_buf_size = dst - s->buffer;
1892 memset(s->buffer + *unescaped_buf_size, 0,
1893 FF_INPUT_BUFFER_PADDING_SIZE);
1895 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
1896 (buf_end - *buf_ptr) - (dst - s->buffer));
1897 } else if (start_code == SOS && s->ls) {
1898 const uint8_t *src = *buf_ptr;
1899 uint8_t *dst = s->buffer;
1905 while (src + t < buf_end) {
1906 uint8_t x = src[t++];
1908 while ((src + t < buf_end) && x == 0xff)
1917 init_put_bits(&pb, dst, t);
1919 /* unescape bitstream */
1921 uint8_t x = src[b++];
1922 put_bits(&pb, 8, x);
1926 av_log(s->avctx, AV_LOG_WARNING, "Invalid escape sequence\n");
1929 put_bits(&pb, 7, x);
1933 flush_put_bits(&pb);
1935 *unescaped_buf_ptr = dst;
1936 *unescaped_buf_size = (bit_count + 7) >> 3;
1937 memset(s->buffer + *unescaped_buf_size, 0,
1938 FF_INPUT_BUFFER_PADDING_SIZE);
1940 *unescaped_buf_ptr = *buf_ptr;
1941 *unescaped_buf_size = buf_end - *buf_ptr;
1947 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1950 AVFrame *frame = data;
1951 const uint8_t *buf = avpkt->data;
1952 int buf_size = avpkt->size;
1953 MJpegDecodeContext *s = avctx->priv_data;
1954 const uint8_t *buf_end, *buf_ptr;
1955 const uint8_t *unescaped_buf_ptr;
1957 int unescaped_buf_size;
1963 av_dict_free(&s->exif_metadata);
1964 av_freep(&s->stereo3d);
1965 s->adobe_transform = -1;
1968 buf_end = buf + buf_size;
1969 while (buf_ptr < buf_end) {
1970 /* find start next marker */
1971 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1973 &unescaped_buf_size);
1975 if (start_code < 0) {
1977 } else if (unescaped_buf_size > INT_MAX / 8) {
1978 av_log(avctx, AV_LOG_ERROR,
1979 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1980 start_code, unescaped_buf_size, buf_size);
1981 return AVERROR_INVALIDDATA;
1983 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
1984 start_code, buf_end - buf_ptr);
1986 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
1989 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
1993 s->start_code = start_code;
1994 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1995 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1997 /* process markers */
1998 if (start_code >= 0xd0 && start_code <= 0xd7)
1999 av_log(avctx, AV_LOG_DEBUG,
2000 "restart marker: %d\n", start_code & 0x0f);
2002 else if (start_code >= APP0 && start_code <= APP15)
2003 mjpeg_decode_app(s);
2005 else if (start_code == COM)
2006 mjpeg_decode_com(s);
2010 if (!CONFIG_JPEGLS_DECODER &&
2011 (start_code == SOF48 || start_code == LSE)) {
2012 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
2013 return AVERROR(ENOSYS);
2016 switch (start_code) {
2018 s->restart_interval = 0;
2019 s->restart_count = 0;
2020 /* nothing to do on SOI */
2023 ff_mjpeg_decode_dqt(s);
2026 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
2027 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
2036 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2043 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2050 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2057 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2061 if (!CONFIG_JPEGLS_DECODER ||
2062 (ret = ff_jpegls_decode_lse(s)) < 0)
2068 if (!s->got_picture) {
2069 av_log(avctx, AV_LOG_WARNING,
2070 "Found EOI before any SOF, ignoring\n");
2073 if (s->interlaced) {
2074 s->bottom_field ^= 1;
2075 /* if not bottom field, do not output image yet */
2076 if (s->bottom_field == !s->interlace_polarity)
2079 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2085 int qp = FFMAX3(s->qscale[0],
2088 int qpw = (s->width + 15) / 16;
2089 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2091 memset(qp_table_buf->data, qp, qpw);
2092 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2095 if(avctx->debug & FF_DEBUG_QP)
2096 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2102 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2103 (avctx->err_recognition & AV_EF_EXPLODE))
2107 mjpeg_decode_dri(s);
2119 av_log(avctx, AV_LOG_ERROR,
2120 "mjpeg: unsupported coding type (%x)\n", start_code);
2124 /* eof process start code */
2125 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2126 av_log(avctx, AV_LOG_DEBUG,
2127 "marker parser used %d bytes (%d bits)\n",
2128 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2130 if (s->got_picture && s->cur_scan) {
2131 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2134 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2135 return AVERROR_INVALIDDATA;
2141 is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step_minus1;
2143 if (AV_RB32(s->upscale_h)) {
2145 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2146 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2147 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2148 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2149 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2150 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2151 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2152 avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2153 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2154 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2155 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2156 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2158 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2159 for (p = 0; p<4; p++) {
2160 uint8_t *line = s->picture_ptr->data[p];
2163 if (!s->upscale_h[p])
2166 w = FF_CEIL_RSHIFT(w, hshift);
2167 h = FF_CEIL_RSHIFT(h, vshift);
2169 if (s->upscale_v[p])
2172 for (i = 0; i < h; i++) {
2173 if (s->upscale_h[p] == 1) {
2174 if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2175 else line[w - 1] = line[(w - 1) / 2];
2176 for (index = w - 2; index > 0; index--) {
2178 ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2180 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2182 } else if (s->upscale_h[p] == 2) {
2184 ((uint16_t*)line)[w - 1] =
2185 ((uint16_t*)line)[w - 2] = ((uint16_t*)line)[(w - 1) / 3];
2188 line[w - 2] = line[(w - 1) / 3];
2190 for (index = w - 3; index > 0; index--) {
2191 line[index] = (line[index / 3] + line[(index + 1) / 3] + line[(index + 2) / 3] + 1) / 3;
2194 line += s->linesize[p];
2198 if (AV_RB32(s->upscale_v)) {
2200 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2201 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2202 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2203 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2204 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2205 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2206 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2207 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2208 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2209 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2210 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2211 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2212 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2214 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2215 for (p = 0; p < 4; p++) {
2219 if (!s->upscale_v[p])
2222 w = FF_CEIL_RSHIFT(w, hshift);
2223 h = FF_CEIL_RSHIFT(h, vshift);
2225 dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2226 for (i = h - 1; i; i--) {
2227 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2228 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2229 if (src1 == src2 || i == h - 1) {
2230 memcpy(dst, src1, w);
2232 for (index = 0; index < w; index++)
2233 dst[index] = (src1[index] + src2[index]) >> 1;
2235 dst -= s->linesize[p];
2241 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2242 for (index=0; index<4; index++) {
2243 uint8_t *dst = s->picture_ptr->data[index];
2244 int w = s->picture_ptr->width;
2245 int h = s->picture_ptr->height;
2246 if(index && index<3){
2247 w = FF_CEIL_RSHIFT(w, hshift);
2248 h = FF_CEIL_RSHIFT(h, vshift);
2251 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2252 for (i=0; i<h/2; i++) {
2254 FFSWAP(int, dst[j], dst2[j]);
2255 dst += s->picture_ptr->linesize[index];
2256 dst2 -= s->picture_ptr->linesize[index];
2261 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2262 int w = s->picture_ptr->width;
2263 int h = s->picture_ptr->height;
2264 for (i=0; i<h; i++) {
2267 for (index=0; index<4; index++) {
2268 dst[index] = s->picture_ptr->data[index]
2269 + s->picture_ptr->linesize[index]*i;
2271 for (j=0; j<w; j++) {
2273 int r = dst[0][j] * k;
2274 int g = dst[1][j] * k;
2275 int b = dst[2][j] * k;
2276 dst[0][j] = g*257 >> 16;
2277 dst[1][j] = b*257 >> 16;
2278 dst[2][j] = r*257 >> 16;
2283 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2284 int w = s->picture_ptr->width;
2285 int h = s->picture_ptr->height;
2286 for (i=0; i<h; i++) {
2289 for (index=0; index<4; index++) {
2290 dst[index] = s->picture_ptr->data[index]
2291 + s->picture_ptr->linesize[index]*i;
2293 for (j=0; j<w; j++) {
2295 int r = (255 - dst[0][j]) * k;
2296 int g = (128 - dst[1][j]) * k;
2297 int b = (128 - dst[2][j]) * k;
2298 dst[0][j] = r*257 >> 16;
2299 dst[1][j] = (g*257 >> 16) + 128;
2300 dst[2][j] = (b*257 >> 16) + 128;
2307 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2309 stereo->type = s->stereo3d->type;
2310 stereo->flags = s->stereo3d->flags;
2312 av_freep(&s->stereo3d);
2315 av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
2316 av_dict_free(&s->exif_metadata);
2318 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2320 // return buf_end - buf_ptr;
2321 return buf_ptr - buf;
2324 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2326 MJpegDecodeContext *s = avctx->priv_data;
2329 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2330 av_log(avctx, AV_LOG_INFO, "Single field\n");
2334 av_frame_free(&s->picture);
2335 s->picture_ptr = NULL;
2336 } else if (s->picture_ptr)
2337 av_frame_unref(s->picture_ptr);
2339 av_freep(&s->buffer);
2340 av_freep(&s->stereo3d);
2341 av_freep(&s->ljpeg_buffer);
2342 s->ljpeg_buffer_size = 0;
2344 for (i = 0; i < 3; i++) {
2345 for (j = 0; j < 4; j++)
2346 ff_free_vlc(&s->vlcs[i][j]);
2348 for (i = 0; i < MAX_COMPONENTS; i++) {
2349 av_freep(&s->blocks[i]);
2350 av_freep(&s->last_nnz[i]);
2352 av_dict_free(&s->exif_metadata);
2356 static void decode_flush(AVCodecContext *avctx)
2358 MJpegDecodeContext *s = avctx->priv_data;
2362 #if CONFIG_MJPEG_DECODER
2363 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2364 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2365 static const AVOption options[] = {
2366 { "extern_huff", "Use external huffman table.",
2367 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
2371 static const AVClass mjpegdec_class = {
2372 .class_name = "MJPEG decoder",
2373 .item_name = av_default_item_name,
2375 .version = LIBAVUTIL_VERSION_INT,
2378 AVCodec ff_mjpeg_decoder = {
2380 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2381 .type = AVMEDIA_TYPE_VIDEO,
2382 .id = AV_CODEC_ID_MJPEG,
2383 .priv_data_size = sizeof(MJpegDecodeContext),
2384 .init = ff_mjpeg_decode_init,
2385 .close = ff_mjpeg_decode_end,
2386 .decode = ff_mjpeg_decode_frame,
2387 .flush = decode_flush,
2388 .capabilities = CODEC_CAP_DR1,
2390 .priv_class = &mjpegdec_class,
2391 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
2394 #if CONFIG_THP_DECODER
2395 AVCodec ff_thp_decoder = {
2397 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2398 .type = AVMEDIA_TYPE_VIDEO,
2399 .id = AV_CODEC_ID_THP,
2400 .priv_data_size = sizeof(MJpegDecodeContext),
2401 .init = ff_mjpeg_decode_init,
2402 .close = ff_mjpeg_decode_end,
2403 .decode = ff_mjpeg_decode_frame,
2404 .flush = decode_flush,
2405 .capabilities = CODEC_CAP_DR1,
2407 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,