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 static void init_idct(AVCodecContext *avctx)
103 MJpegDecodeContext *s = avctx->priv_data;
105 ff_idctdsp_init(&s->idsp, avctx);
106 ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
110 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
112 MJpegDecodeContext *s = avctx->priv_data;
114 if (!s->picture_ptr) {
115 s->picture = av_frame_alloc();
117 return AVERROR(ENOMEM);
118 s->picture_ptr = s->picture;
122 ff_blockdsp_init(&s->bdsp, avctx);
123 ff_hpeldsp_init(&s->hdsp, avctx->flags);
128 s->first_picture = 1;
130 s->org_height = avctx->coded_height;
131 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
132 avctx->colorspace = AVCOL_SPC_BT470BG;
134 build_basic_mjpeg_vlc(s);
136 if (s->extern_huff) {
137 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
138 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
139 if (ff_mjpeg_decode_dht(s)) {
140 av_log(avctx, AV_LOG_ERROR,
141 "error using external huffman table, switching back to internal\n");
142 build_basic_mjpeg_vlc(s);
145 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
146 s->interlace_polarity = 1; /* bottom field first */
147 av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
148 } else if (avctx->field_order == AV_FIELD_UNKNOWN) {
149 if (avctx->codec_tag == AV_RL32("MJPG"))
150 s->interlace_polarity = 1;
153 if ( avctx->extradata_size > 8
154 && AV_RL32(avctx->extradata) == 0x2C
155 && AV_RL32(avctx->extradata+4) == 0x18) {
156 parse_avid(s, avctx->extradata, avctx->extradata_size);
159 if (avctx->codec->id == AV_CODEC_ID_AMV)
166 /* quantize tables */
167 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
171 len = get_bits(&s->gb, 16) - 2;
173 if (8*len > get_bits_left(&s->gb)) {
174 av_log(s->avctx, AV_LOG_ERROR, "dqt: len %d is too large\n", len);
175 return AVERROR_INVALIDDATA;
179 int pr = get_bits(&s->gb, 4);
181 av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
182 return AVERROR_INVALIDDATA;
184 index = get_bits(&s->gb, 4);
187 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
188 /* read quant table */
189 for (i = 0; i < 64; i++) {
190 s->quant_matrixes[index][i] = get_bits(&s->gb, pr ? 16 : 8);
193 // XXX FIXME finetune, and perhaps add dc too
194 s->qscale[index] = FFMAX(s->quant_matrixes[index][1],
195 s->quant_matrixes[index][8]) >> 1;
196 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
197 index, s->qscale[index]);
198 len -= 1 + 64 * (1+pr);
203 /* decode huffman tables and build VLC decoders */
204 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
206 int len, index, i, class, n, v, code_max;
207 uint8_t bits_table[17];
208 uint8_t val_table[256];
211 len = get_bits(&s->gb, 16) - 2;
213 if (8*len > get_bits_left(&s->gb)) {
214 av_log(s->avctx, AV_LOG_ERROR, "dht: len %d is too large\n", len);
215 return AVERROR_INVALIDDATA;
220 return AVERROR_INVALIDDATA;
221 class = get_bits(&s->gb, 4);
223 return AVERROR_INVALIDDATA;
224 index = get_bits(&s->gb, 4);
226 return AVERROR_INVALIDDATA;
228 for (i = 1; i <= 16; i++) {
229 bits_table[i] = get_bits(&s->gb, 8);
233 if (len < n || n > 256)
234 return AVERROR_INVALIDDATA;
237 for (i = 0; i < n; i++) {
238 v = get_bits(&s->gb, 8);
245 /* build VLC and flush previous vlc if present */
246 ff_free_vlc(&s->vlcs[class][index]);
247 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
248 class, index, code_max + 1);
249 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
250 code_max + 1, 0, class > 0)) < 0)
254 ff_free_vlc(&s->vlcs[2][index]);
255 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
256 code_max + 1, 0, 0)) < 0)
263 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
265 int len, nb_components, i, width, height, bits, ret;
267 int h_count[MAX_COMPONENTS] = { 0 };
268 int v_count[MAX_COMPONENTS] = { 0 };
271 memset(s->upscale_h, 0, sizeof(s->upscale_h));
272 memset(s->upscale_v, 0, sizeof(s->upscale_v));
274 /* XXX: verify len field validity */
275 len = get_bits(&s->gb, 16);
276 bits = get_bits(&s->gb, 8);
278 if (bits > 16 || bits < 1) {
279 av_log(s->avctx, AV_LOG_ERROR, "bits %d is invalid\n", bits);
280 return AVERROR_INVALIDDATA;
283 if (s->avctx->bits_per_raw_sample != bits) {
284 av_log(s->avctx, s->avctx->bits_per_raw_sample > 0 ? AV_LOG_INFO : AV_LOG_DEBUG, "Changing bps from %d to %d\n", s->avctx->bits_per_raw_sample, bits);
285 s->avctx->bits_per_raw_sample = bits;
290 if (bits == 9 && !s->pegasus_rct)
291 s->rct = 1; // FIXME ugly
293 if(s->lossless && s->avctx->lowres){
294 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
298 height = get_bits(&s->gb, 16);
299 width = get_bits(&s->gb, 16);
301 // HACK for odd_height.mov
302 if (s->interlaced && s->width == width && s->height == height + 1)
305 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
306 if (av_image_check_size(width, height, 0, s->avctx))
307 return AVERROR_INVALIDDATA;
309 nb_components = get_bits(&s->gb, 8);
310 if (nb_components <= 0 ||
311 nb_components > MAX_COMPONENTS)
313 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
314 if (nb_components != s->nb_components) {
315 av_log(s->avctx, AV_LOG_ERROR,
316 "nb_components changing in interlaced picture\n");
317 return AVERROR_INVALIDDATA;
320 if (s->ls && !(bits <= 8 || nb_components == 1)) {
321 avpriv_report_missing_feature(s->avctx,
322 "JPEG-LS that is not <= 8 "
323 "bits/component or 16-bit gray");
324 return AVERROR_PATCHWELCOME;
326 s->nb_components = nb_components;
329 for (i = 0; i < nb_components; i++) {
331 s->component_id[i] = get_bits(&s->gb, 8) - 1;
332 h_count[i] = get_bits(&s->gb, 4);
333 v_count[i] = get_bits(&s->gb, 4);
334 /* compute hmax and vmax (only used in interleaved case) */
335 if (h_count[i] > s->h_max)
336 s->h_max = h_count[i];
337 if (v_count[i] > s->v_max)
338 s->v_max = v_count[i];
339 s->quant_index[i] = get_bits(&s->gb, 8);
340 if (s->quant_index[i] >= 4) {
341 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
342 return AVERROR_INVALIDDATA;
344 if (!h_count[i] || !v_count[i]) {
345 av_log(s->avctx, AV_LOG_ERROR,
346 "Invalid sampling factor in component %d %d:%d\n",
347 i, h_count[i], v_count[i]);
348 return AVERROR_INVALIDDATA;
351 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
352 i, h_count[i], v_count[i],
353 s->component_id[i], s->quant_index[i]);
355 if ( nb_components == 4
356 && s->component_id[0] == 'C' - 1
357 && s->component_id[1] == 'M' - 1
358 && s->component_id[2] == 'Y' - 1
359 && s->component_id[3] == 'K' - 1)
360 s->adobe_transform = 0;
362 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
363 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
364 return AVERROR_PATCHWELCOME;
368 /* if different size, realloc/alloc picture */
369 if (width != s->width || height != s->height || bits != s->bits ||
370 memcmp(s->h_count, h_count, sizeof(h_count)) ||
371 memcmp(s->v_count, v_count, sizeof(v_count))) {
376 memcpy(s->h_count, h_count, sizeof(h_count));
377 memcpy(s->v_count, v_count, sizeof(v_count));
381 /* test interlaced mode */
382 if (s->first_picture &&
383 (s->multiscope != 2 || s->avctx->time_base.den >= 25 * s->avctx->time_base.num) &&
384 s->org_height != 0 &&
385 s->height < ((s->org_height * 3) / 4)) {
387 s->bottom_field = s->interlace_polarity;
388 s->picture_ptr->interlaced_frame = 1;
389 s->picture_ptr->top_field_first = !s->interlace_polarity;
393 ret = ff_set_dimensions(s->avctx, width, height);
397 s->first_picture = 0;
400 if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
401 if (s->progressive) {
402 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
403 return AVERROR_INVALIDDATA;
406 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
408 else if (!s->lossless)
410 /* XXX: not complete test ! */
411 pix_fmt_id = ((unsigned)s->h_count[0] << 28) | (s->v_count[0] << 24) |
412 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
413 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
414 (s->h_count[3] << 4) | s->v_count[3];
415 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
416 /* NOTE we do not allocate pictures large enough for the possible
417 * padding of h/v_count being 4 */
418 if (!(pix_fmt_id & 0xD0D0D0D0))
419 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
420 if (!(pix_fmt_id & 0x0D0D0D0D))
421 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
423 for (i = 0; i < 8; i++) {
424 int j = 6 + (i&1) - (i&6);
425 int is = (pix_fmt_id >> (4*i)) & 0xF;
426 int js = (pix_fmt_id >> (4*j)) & 0xF;
428 if (is == 1 && js != 2 && (i < 2 || i > 5))
429 js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
430 if (is == 1 && js != 2 && (i < 2 || i > 5))
431 js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
433 if (is == 1 && js == 2) {
434 if (i & 1) s->upscale_h[j/2] = 1;
435 else s->upscale_v[j/2] = 1;
439 switch (pix_fmt_id) {
442 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
444 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
445 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
447 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
448 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
449 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
452 av_assert0(s->nb_components == 3);
456 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
458 if (s->adobe_transform == 0 && s->bits <= 8) {
459 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
461 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
462 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
465 av_assert0(s->nb_components == 4);
469 if (s->adobe_transform == 0 && s->bits <= 8) {
470 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
471 s->upscale_v[1] = s->upscale_v[2] = 1;
472 s->upscale_h[1] = s->upscale_h[2] = 1;
473 } else if (s->adobe_transform == 2 && s->bits <= 8) {
474 s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
475 s->upscale_v[1] = s->upscale_v[2] = 1;
476 s->upscale_h[1] = s->upscale_h[2] = 1;
477 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
479 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
480 else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
481 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
483 av_assert0(s->nb_components == 4);
489 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
492 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
497 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
500 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
512 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
514 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
521 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
522 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
525 s->upscale_v[0] = s->upscale_v[1] = 1;
527 if (pix_fmt_id == 0x14111100)
528 s->upscale_v[1] = s->upscale_v[2] = 1;
529 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
532 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
536 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
537 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
540 s->upscale_h[0] = s->upscale_h[1] = 1;
542 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
543 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
544 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
550 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
551 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
552 s->upscale_h[1] = s->upscale_h[2] = 2;
556 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
559 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
564 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
565 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
566 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
567 if (pix_fmt_id == 0x42111100) {
570 s->upscale_h[1] = s->upscale_h[2] = 1;
571 } else if (pix_fmt_id == 0x24111100) {
574 s->upscale_v[1] = s->upscale_v[2] = 1;
578 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
581 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
585 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x bits:%d\n", pix_fmt_id, s->bits);
586 memset(s->upscale_h, 0, sizeof(s->upscale_h));
587 memset(s->upscale_v, 0, sizeof(s->upscale_v));
588 return AVERROR_PATCHWELCOME;
590 if ((AV_RB32(s->upscale_h) || AV_RB32(s->upscale_v)) && s->avctx->lowres) {
591 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
592 return AVERROR_PATCHWELCOME;
595 memset(s->upscale_h, 0, sizeof(s->upscale_h));
596 memset(s->upscale_v, 0, sizeof(s->upscale_v));
597 if (s->nb_components == 3) {
598 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
599 } else if (s->nb_components != 1) {
600 av_log(s->avctx, AV_LOG_ERROR, "Unsupported number of components %d\n", s->nb_components);
601 return AVERROR_PATCHWELCOME;
602 } else if (s->palette_index && s->bits <= 8)
603 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
604 else if (s->bits <= 8)
605 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
607 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
610 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
612 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
616 if (s->avctx->skip_frame == AVDISCARD_ALL) {
617 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
618 s->picture_ptr->key_frame = 1;
623 av_frame_unref(s->picture_ptr);
624 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
626 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
627 s->picture_ptr->key_frame = 1;
630 for (i = 0; i < 4; i++)
631 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
633 ff_dlog(s->avctx, "%d %d %d %d %d %d\n",
634 s->width, s->height, s->linesize[0], s->linesize[1],
635 s->interlaced, s->avctx->height);
637 if (len != (8 + (3 * nb_components)))
638 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
641 if ((s->rgb && !s->lossless && !s->ls) ||
642 (!s->rgb && s->ls && s->nb_components > 1)) {
643 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
644 return AVERROR_PATCHWELCOME;
647 /* totally blank picture as progressive JPEG will only add details to it */
648 if (s->progressive) {
649 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
650 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
651 for (i = 0; i < s->nb_components; i++) {
652 int size = bw * bh * s->h_count[i] * s->v_count[i];
653 av_freep(&s->blocks[i]);
654 av_freep(&s->last_nnz[i]);
655 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
656 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
657 if (!s->blocks[i] || !s->last_nnz[i])
658 return AVERROR(ENOMEM);
659 s->block_stride[i] = bw * s->h_count[i];
661 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
666 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
669 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
670 if (code < 0 || code > 16) {
671 av_log(s->avctx, AV_LOG_WARNING,
672 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
673 0, dc_index, &s->vlcs[0][dc_index]);
678 return get_xbits(&s->gb, code);
683 /* decode block and dequantize */
684 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
685 int dc_index, int ac_index, int16_t *quant_matrix)
687 int code, i, j, level, val;
690 val = mjpeg_decode_dc(s, dc_index);
691 if (val == 0xfffff) {
692 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
693 return AVERROR_INVALIDDATA;
695 val = val * quant_matrix[0] + s->last_dc[component];
696 val = FFMIN(val, 32767);
697 s->last_dc[component] = val;
701 {OPEN_READER(re, &s->gb);
703 UPDATE_CACHE(re, &s->gb);
704 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
706 i += ((unsigned)code) >> 4;
709 if (code > MIN_CACHE_BITS - 16)
710 UPDATE_CACHE(re, &s->gb);
713 int cache = GET_CACHE(re, &s->gb);
714 int sign = (~cache) >> 31;
715 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
718 LAST_SKIP_BITS(re, &s->gb, code);
721 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
722 return AVERROR_INVALIDDATA;
724 j = s->scantable.permutated[i];
725 block[j] = level * quant_matrix[i];
728 CLOSE_READER(re, &s->gb);}
733 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
734 int component, int dc_index,
735 int16_t *quant_matrix, int Al)
738 s->bdsp.clear_block(block);
739 val = mjpeg_decode_dc(s, dc_index);
740 if (val == 0xfffff) {
741 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
742 return AVERROR_INVALIDDATA;
744 val = (val * (quant_matrix[0] << Al)) + s->last_dc[component];
745 s->last_dc[component] = val;
750 /* decode block and dequantize - progressive JPEG version */
751 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
752 uint8_t *last_nnz, int ac_index,
753 int16_t *quant_matrix,
754 int ss, int se, int Al, int *EOBRUN)
756 int code, i, j, level, val, run;
764 OPEN_READER(re, &s->gb);
765 for (i = ss; ; i++) {
766 UPDATE_CACHE(re, &s->gb);
767 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
769 run = ((unsigned) code) >> 4;
773 if (code > MIN_CACHE_BITS - 16)
774 UPDATE_CACHE(re, &s->gb);
777 int cache = GET_CACHE(re, &s->gb);
778 int sign = (~cache) >> 31;
779 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
782 LAST_SKIP_BITS(re, &s->gb, code);
786 j = s->scantable.permutated[se];
787 block[j] = level * (quant_matrix[se] << Al);
790 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
791 return AVERROR_INVALIDDATA;
793 j = s->scantable.permutated[i];
794 block[j] = level * (quant_matrix[i] << Al);
796 if (run == 0xF) {// ZRL - skip 15 coefficients
799 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
800 return AVERROR_INVALIDDATA;
805 UPDATE_CACHE(re, &s->gb);
806 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
807 LAST_SKIP_BITS(re, &s->gb, run);
814 CLOSE_READER(re, &s->gb);
823 #define REFINE_BIT(j) { \
824 UPDATE_CACHE(re, &s->gb); \
825 sign = block[j] >> 15; \
826 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
827 ((quant_matrix[i] ^ sign) - sign) << Al; \
828 LAST_SKIP_BITS(re, &s->gb, 1); \
836 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
841 j = s->scantable.permutated[i]; \
844 else if (run-- == 0) \
848 /* decode block and dequantize - progressive JPEG refinement pass */
849 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
851 int ac_index, int16_t *quant_matrix,
852 int ss, int se, int Al, int *EOBRUN)
854 int code, i = ss, j, sign, val, run;
855 int last = FFMIN(se, *last_nnz);
857 OPEN_READER(re, &s->gb);
862 UPDATE_CACHE(re, &s->gb);
863 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
866 run = ((unsigned) code) >> 4;
867 UPDATE_CACHE(re, &s->gb);
868 val = SHOW_UBITS(re, &s->gb, 1);
869 LAST_SKIP_BITS(re, &s->gb, 1);
871 j = s->scantable.permutated[i];
873 block[j] = ((quant_matrix[i] << Al) ^ val) - val;
877 CLOSE_READER(re, &s->gb);
881 run = ((unsigned) code) >> 4;
888 UPDATE_CACHE(re, &s->gb);
889 run += SHOW_UBITS(re, &s->gb, val);
890 LAST_SKIP_BITS(re, &s->gb, val);
902 for (; i <= last; i++) {
903 j = s->scantable.permutated[i];
907 CLOSE_READER(re, &s->gb);
914 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
919 if (s->restart_interval) {
921 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
922 align_get_bits(&s->gb);
923 for (i = 0; i < nb_components; i++) /* reset dc */
924 s->last_dc[i] = (4 << s->bits);
927 i = 8 + ((-get_bits_count(&s->gb)) & 7);
929 if (s->restart_count == 0) {
930 if( show_bits(&s->gb, i) == (1 << i) - 1
931 || show_bits(&s->gb, i) == 0xFF) {
932 int pos = get_bits_count(&s->gb);
933 align_get_bits(&s->gb);
934 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
935 skip_bits(&s->gb, 8);
936 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
937 for (i = 0; i < nb_components; i++) /* reset dc */
938 s->last_dc[i] = (4 << s->bits);
941 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
948 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
951 uint16_t (*buffer)[4];
952 int left[4], top[4], topleft[4];
953 const int linesize = s->linesize[0];
954 const int mask = ((1 << s->bits) - 1) << point_transform;
958 if (s->nb_components != 3 && s->nb_components != 4)
959 return AVERROR_INVALIDDATA;
960 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
961 return AVERROR_INVALIDDATA;
964 s->restart_count = s->restart_interval;
966 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
967 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
968 buffer = s->ljpeg_buffer;
970 for (i = 0; i < 4; i++)
971 buffer[0][i] = 1 << (s->bits - 1);
973 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
974 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
976 if (s->interlaced && s->bottom_field)
977 ptr += linesize >> 1;
979 for (i = 0; i < 4; i++)
980 top[i] = left[i] = topleft[i] = buffer[0][i];
982 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
983 int modified_predictor = predictor;
985 if (s->restart_interval && !s->restart_count){
986 s->restart_count = s->restart_interval;
990 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
992 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
993 modified_predictor = 1;
995 for (i=0;i<nb_components;i++) {
999 top[i] = buffer[mb_x][i];
1001 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
1003 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1007 left[i] = buffer[mb_x][i] =
1008 mask & (pred + (dc * (1 << point_transform)));
1011 if (s->restart_interval && !--s->restart_count) {
1012 align_get_bits(&s->gb);
1013 skip_bits(&s->gb, 16); /* skip RSTn */
1016 if (s->rct && s->nb_components == 4) {
1017 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1018 ptr[4*mb_x + 2] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1019 ptr[4*mb_x + 1] = buffer[mb_x][1] + ptr[4*mb_x + 2];
1020 ptr[4*mb_x + 3] = buffer[mb_x][2] + ptr[4*mb_x + 2];
1021 ptr[4*mb_x + 0] = buffer[mb_x][3];
1023 } else if (s->nb_components == 4) {
1024 for(i=0; i<nb_components; i++) {
1025 int c= s->comp_index[i];
1027 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1028 ptr[4*mb_x+3-c] = buffer[mb_x][i];
1030 } else if(s->bits == 9) {
1031 return AVERROR_PATCHWELCOME;
1033 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1034 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
1038 } else if (s->rct) {
1039 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1040 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1041 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1042 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1044 } else if (s->pegasus_rct) {
1045 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1046 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
1047 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1048 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1051 for(i=0; i<nb_components; i++) {
1052 int c= s->comp_index[i];
1054 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1055 ptr[3*mb_x+2-c] = buffer[mb_x][i];
1057 } else if(s->bits == 9) {
1058 return AVERROR_PATCHWELCOME;
1060 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1061 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
1070 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1071 int point_transform, int nb_components)
1073 int i, mb_x, mb_y, mask;
1074 int bits= (s->bits+7)&~7;
1075 int resync_mb_y = 0;
1076 int resync_mb_x = 0;
1078 point_transform += bits - s->bits;
1079 mask = ((1 << s->bits) - 1) << point_transform;
1081 av_assert0(nb_components>=1 && nb_components<=4);
1083 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1084 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1085 if (s->restart_interval && !s->restart_count){
1086 s->restart_count = s->restart_interval;
1091 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1092 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1093 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1094 for (i = 0; i < nb_components; i++) {
1097 int n, h, v, x, y, c, j, linesize;
1098 n = s->nb_blocks[i];
1099 c = s->comp_index[i];
1104 linesize= s->linesize[c];
1106 if(bits>8) linesize /= 2;
1108 for(j=0; j<n; j++) {
1111 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1114 if ( h * mb_x + x >= s->width
1115 || v * mb_y + y >= s->height) {
1117 } else if (bits<=8) {
1118 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1120 if(x==0 && leftcol){
1121 pred= 1 << (bits - 1);
1126 if(x==0 && leftcol){
1127 pred= ptr[-linesize];
1129 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1133 if (s->interlaced && s->bottom_field)
1134 ptr += linesize >> 1;
1136 *ptr= pred + (dc << point_transform);
1138 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1140 if(x==0 && leftcol){
1141 pred= 1 << (bits - 1);
1146 if(x==0 && leftcol){
1147 pred= ptr16[-linesize];
1149 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1153 if (s->interlaced && s->bottom_field)
1154 ptr16 += linesize >> 1;
1156 *ptr16= pred + (dc << point_transform);
1165 for (i = 0; i < nb_components; i++) {
1168 int n, h, v, x, y, c, j, linesize, dc;
1169 n = s->nb_blocks[i];
1170 c = s->comp_index[i];
1175 linesize = s->linesize[c];
1177 if(bits>8) linesize /= 2;
1179 for (j = 0; j < n; j++) {
1182 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1185 if ( h * mb_x + x >= s->width
1186 || v * mb_y + y >= s->height) {
1188 } else if (bits<=8) {
1189 ptr = s->picture_ptr->data[c] +
1190 (linesize * (v * mb_y + y)) +
1191 (h * mb_x + x); //FIXME optimize this crap
1192 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1195 *ptr = pred + (dc << point_transform);
1197 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1198 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1201 *ptr16= pred + (dc << point_transform);
1211 if (s->restart_interval && !--s->restart_count) {
1212 align_get_bits(&s->gb);
1213 skip_bits(&s->gb, 16); /* skip RSTn */
1220 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1221 uint8_t *dst, const uint8_t *src,
1222 int linesize, int lowres)
1225 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1227 case 1: copy_block4(dst, src, linesize, linesize, 4);
1229 case 2: copy_block2(dst, src, linesize, linesize, 2);
1231 case 3: *dst = *src;
1236 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1238 int block_x, block_y;
1239 int size = 8 >> s->avctx->lowres;
1241 for (block_y=0; block_y<size; block_y++)
1242 for (block_x=0; block_x<size; block_x++)
1243 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1245 for (block_y=0; block_y<size; block_y++)
1246 for (block_x=0; block_x<size; block_x++)
1247 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1251 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1252 int Al, const uint8_t *mb_bitmask,
1253 int mb_bitmask_size,
1254 const AVFrame *reference)
1256 int i, mb_x, mb_y, chroma_h_shift, chroma_v_shift, chroma_width, chroma_height;
1257 uint8_t *data[MAX_COMPONENTS];
1258 const uint8_t *reference_data[MAX_COMPONENTS];
1259 int linesize[MAX_COMPONENTS];
1260 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1261 int bytes_per_pixel = 1 + (s->bits > 8);
1264 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1265 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1266 return AVERROR_INVALIDDATA;
1268 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1271 s->restart_count = 0;
1273 av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &chroma_h_shift,
1275 chroma_width = AV_CEIL_RSHIFT(s->width, chroma_h_shift);
1276 chroma_height = AV_CEIL_RSHIFT(s->height, chroma_v_shift);
1278 for (i = 0; i < nb_components; i++) {
1279 int c = s->comp_index[i];
1280 data[c] = s->picture_ptr->data[c];
1281 reference_data[c] = reference ? reference->data[c] : NULL;
1282 linesize[c] = s->linesize[c];
1283 s->coefs_finished[c] |= 1;
1286 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1287 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1288 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1290 if (s->restart_interval && !s->restart_count)
1291 s->restart_count = s->restart_interval;
1293 if (get_bits_left(&s->gb) < 0) {
1294 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1295 -get_bits_left(&s->gb));
1296 return AVERROR_INVALIDDATA;
1298 for (i = 0; i < nb_components; i++) {
1300 int n, h, v, x, y, c, j;
1302 n = s->nb_blocks[i];
1303 c = s->comp_index[i];
1308 for (j = 0; j < n; j++) {
1309 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1310 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1312 if (s->interlaced && s->bottom_field)
1313 block_offset += linesize[c] >> 1;
1314 if ( 8*(h * mb_x + x) < ((c == 1) || (c == 2) ? chroma_width : s->width)
1315 && 8*(v * mb_y + y) < ((c == 1) || (c == 2) ? chroma_height : s->height)) {
1316 ptr = data[c] + block_offset;
1319 if (!s->progressive) {
1322 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1323 linesize[c], s->avctx->lowres);
1326 s->bdsp.clear_block(s->block);
1327 if (decode_block(s, s->block, i,
1328 s->dc_index[i], s->ac_index[i],
1329 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1330 av_log(s->avctx, AV_LOG_ERROR,
1331 "error y=%d x=%d\n", mb_y, mb_x);
1332 return AVERROR_INVALIDDATA;
1335 s->idsp.idct_put(ptr, linesize[c], s->block);
1337 shift_output(s, ptr, linesize[c]);
1341 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1343 int16_t *block = s->blocks[c][block_idx];
1345 block[0] += get_bits1(&s->gb) *
1346 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1347 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1348 s->quant_matrixes[s->quant_sindex[i]],
1350 av_log(s->avctx, AV_LOG_ERROR,
1351 "error y=%d x=%d\n", mb_y, mb_x);
1352 return AVERROR_INVALIDDATA;
1355 ff_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1356 ff_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1357 mb_x, mb_y, x, y, c, s->bottom_field,
1358 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1366 handle_rstn(s, nb_components);
1372 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1373 int se, int Ah, int Al)
1377 int c = s->comp_index[0];
1378 uint8_t *data = s->picture_ptr->data[c];
1379 int linesize = s->linesize[c];
1381 int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1382 int bytes_per_pixel = 1 + (s->bits > 8);
1384 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1385 if (se < ss || se > 63) {
1386 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1387 return AVERROR_INVALIDDATA;
1390 // s->coefs_finished is a bitmask for coefficients coded
1391 // ss and se are parameters telling start and end coefficients
1392 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1393 last_scan = !Al && !~s->coefs_finished[c];
1395 if (s->interlaced && s->bottom_field)
1396 data += linesize >> 1;
1398 s->restart_count = 0;
1400 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1401 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1402 int block_idx = mb_y * s->block_stride[c];
1403 int16_t (*block)[64] = &s->blocks[c][block_idx];
1404 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1405 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1407 if (s->restart_interval && !s->restart_count)
1408 s->restart_count = s->restart_interval;
1411 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1412 quant_matrix, ss, se, Al, &EOBRUN);
1414 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1415 quant_matrix, ss, se, Al, &EOBRUN);
1417 av_log(s->avctx, AV_LOG_ERROR,
1418 "error y=%d x=%d\n", mb_y, mb_x);
1419 return AVERROR_INVALIDDATA;
1423 s->idsp.idct_put(ptr, linesize, *block);
1425 shift_output(s, ptr, linesize);
1426 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1428 if (handle_rstn(s, 0))
1435 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1436 int mb_bitmask_size, const AVFrame *reference)
1438 int len, nb_components, i, h, v, predictor, point_transform;
1440 const int block_size = s->lossless ? 1 : 8;
1441 int ilv, prev_shift;
1443 if (!s->got_picture) {
1444 av_log(s->avctx, AV_LOG_WARNING,
1445 "Can not process SOS before SOF, skipping\n");
1449 av_assert0(s->picture_ptr->data[0]);
1450 /* XXX: verify len field validity */
1451 len = get_bits(&s->gb, 16);
1452 nb_components = get_bits(&s->gb, 8);
1453 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1454 av_log(s->avctx, AV_LOG_ERROR,
1455 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1456 return AVERROR_PATCHWELCOME;
1458 if (len != 6 + 2 * nb_components) {
1459 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1460 return AVERROR_INVALIDDATA;
1462 for (i = 0; i < nb_components; i++) {
1463 id = get_bits(&s->gb, 8) - 1;
1464 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1465 /* find component index */
1466 for (index = 0; index < s->nb_components; index++)
1467 if (id == s->component_id[index])
1469 if (index == s->nb_components) {
1470 av_log(s->avctx, AV_LOG_ERROR,
1471 "decode_sos: index(%d) out of components\n", index);
1472 return AVERROR_INVALIDDATA;
1474 /* Metasoft MJPEG codec has Cb and Cr swapped */
1475 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1476 && nb_components == 3 && s->nb_components == 3 && i)
1479 s->quant_sindex[i] = s->quant_index[index];
1480 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1481 s->h_scount[i] = s->h_count[index];
1482 s->v_scount[i] = s->v_count[index];
1484 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1486 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1487 index = (index+2)%3;
1489 s->comp_index[i] = index;
1491 s->dc_index[i] = get_bits(&s->gb, 4);
1492 s->ac_index[i] = get_bits(&s->gb, 4);
1494 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1495 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1497 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))
1501 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1502 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1503 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1504 prev_shift = get_bits(&s->gb, 4); /* Ah */
1505 point_transform = get_bits(&s->gb, 4); /* Al */
1507 prev_shift = point_transform = 0;
1509 if (nb_components > 1) {
1510 /* interleaved stream */
1511 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1512 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1513 } else if (!s->ls) { /* skip this for JPEG-LS */
1514 h = s->h_max / s->h_scount[0];
1515 v = s->v_max / s->v_scount[0];
1516 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1517 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1518 s->nb_blocks[0] = 1;
1523 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1524 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1525 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1526 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1527 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1530 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1531 for (i = s->mjpb_skiptosod; i > 0; i--)
1532 skip_bits(&s->gb, 8);
1535 for (i = 0; i < nb_components; i++)
1536 s->last_dc[i] = (4 << s->bits);
1539 av_assert0(s->picture_ptr == s->picture);
1540 if (CONFIG_JPEGLS_DECODER && s->ls) {
1542 // reset_ls_coding_parameters(s, 0);
1544 if ((ret = ff_jpegls_decode_picture(s, predictor,
1545 point_transform, ilv)) < 0)
1549 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1552 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1554 nb_components)) < 0)
1559 if (s->progressive && predictor) {
1560 av_assert0(s->picture_ptr == s->picture);
1561 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1563 point_transform)) < 0)
1566 if ((ret = mjpeg_decode_scan(s, nb_components,
1567 prev_shift, point_transform,
1568 mb_bitmask, mb_bitmask_size, reference)) < 0)
1573 if (s->interlaced &&
1574 get_bits_left(&s->gb) > 32 &&
1575 show_bits(&s->gb, 8) == 0xFF) {
1576 GetBitContext bak = s->gb;
1577 align_get_bits(&bak);
1578 if (show_bits(&bak, 16) == 0xFFD1) {
1579 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1581 skip_bits(&s->gb, 16);
1582 s->bottom_field ^= 1;
1591 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1592 return AVERROR_INVALIDDATA;
1595 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1597 if (get_bits(&s->gb, 16) != 4)
1598 return AVERROR_INVALIDDATA;
1599 s->restart_interval = get_bits(&s->gb, 16);
1600 s->restart_count = 0;
1601 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1602 s->restart_interval);
1607 static int mjpeg_decode_app(MJpegDecodeContext *s)
1611 len = get_bits(&s->gb, 16);
1613 return AVERROR_INVALIDDATA;
1614 if (8 * len > get_bits_left(&s->gb))
1615 return AVERROR_INVALIDDATA;
1617 id = get_bits_long(&s->gb, 32);
1620 if (s->avctx->debug & FF_DEBUG_STARTCODE) {
1622 av_get_codec_tag_string(id_str, sizeof(id_str), av_bswap32(id));
1623 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n", id_str, id, len);
1626 /* Buggy AVID, it puts EOI only at every 10th frame. */
1627 /* Also, this fourcc is used by non-avid files too, it holds some
1628 information, but it's always present in AVID-created files. */
1629 if (id == AV_RB32("AVI1")) {
1635 4bytes field_size_less_padding
1638 i = get_bits(&s->gb, 8); len--;
1639 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1641 skip_bits(&s->gb, 8);
1642 skip_bits(&s->gb, 32);
1643 skip_bits(&s->gb, 32);
1651 if (id == AV_RB32("JFIF")) {
1652 int t_w, t_h, v1, v2;
1653 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1654 v1 = get_bits(&s->gb, 8);
1655 v2 = get_bits(&s->gb, 8);
1656 skip_bits(&s->gb, 8);
1658 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1659 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1660 if ( s->avctx->sample_aspect_ratio.num <= 0
1661 || s->avctx->sample_aspect_ratio.den <= 0) {
1662 s->avctx->sample_aspect_ratio.num = 0;
1663 s->avctx->sample_aspect_ratio.den = 1;
1666 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1667 av_log(s->avctx, AV_LOG_INFO,
1668 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1670 s->avctx->sample_aspect_ratio.num,
1671 s->avctx->sample_aspect_ratio.den);
1673 t_w = get_bits(&s->gb, 8);
1674 t_h = get_bits(&s->gb, 8);
1676 /* skip thumbnail */
1677 if (len -10 - (t_w * t_h * 3) > 0)
1678 len -= t_w * t_h * 3;
1684 if ( id == AV_RB32("Adob")
1686 && show_bits(&s->gb, 8) == 'e'
1687 && show_bits_long(&s->gb, 32) != AV_RB32("e_CM")) {
1688 skip_bits(&s->gb, 8); /* 'e' */
1689 skip_bits(&s->gb, 16); /* version */
1690 skip_bits(&s->gb, 16); /* flags0 */
1691 skip_bits(&s->gb, 16); /* flags1 */
1692 s->adobe_transform = get_bits(&s->gb, 8);
1693 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1694 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1699 if (id == AV_RB32("LJIF")) {
1701 int pegasus_rct = s->pegasus_rct;
1702 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1703 av_log(s->avctx, AV_LOG_INFO,
1704 "Pegasus lossless jpeg header found\n");
1705 skip_bits(&s->gb, 16); /* version ? */
1706 skip_bits(&s->gb, 16); /* unknown always 0? */
1707 skip_bits(&s->gb, 16); /* unknown always 0? */
1708 skip_bits(&s->gb, 16); /* unknown always 0? */
1709 switch (i=get_bits(&s->gb, 8)) {
1719 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1724 if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
1725 av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
1730 s->pegasus_rct = pegasus_rct;
1734 if (id == AV_RL32("colr") && len > 0) {
1735 s->colr = get_bits(&s->gb, 8);
1736 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1737 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1741 if (id == AV_RL32("xfrm") && len > 0) {
1742 s->xfrm = get_bits(&s->gb, 8);
1743 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1744 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1749 /* JPS extension by VRex */
1750 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1751 int flags, layout, type;
1752 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1753 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1755 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1756 skip_bits(&s->gb, 16); len -= 2; /* block length */
1757 skip_bits(&s->gb, 8); /* reserved */
1758 flags = get_bits(&s->gb, 8);
1759 layout = get_bits(&s->gb, 8);
1760 type = get_bits(&s->gb, 8);
1763 s->stereo3d = av_stereo3d_alloc();
1768 s->stereo3d->type = AV_STEREO3D_2D;
1769 } else if (type == 1) {
1772 s->stereo3d->type = AV_STEREO3D_LINES;
1775 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1778 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1781 if (!(flags & 0x04)) {
1782 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1789 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1790 GetByteContext gbytes;
1791 int ret, le, ifd_offset, bytes_read;
1792 const uint8_t *aligned;
1794 skip_bits(&s->gb, 16); // skip padding
1797 // init byte wise reading
1798 aligned = align_get_bits(&s->gb);
1799 bytestream2_init(&gbytes, aligned, len);
1802 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1804 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1806 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1808 // read 0th IFD and store the metadata
1809 // (return values > 0 indicate the presence of subimage metadata)
1810 ret = avpriv_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1812 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1816 bytes_read = bytestream2_tell(&gbytes);
1817 skip_bits(&s->gb, bytes_read << 3);
1824 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1825 id = get_bits_long(&s->gb, 32);
1828 if (id == AV_RB32("mjpg")) {
1830 skip_bits(&s->gb, 32); /* field size */
1831 skip_bits(&s->gb, 32); /* pad field size */
1832 skip_bits(&s->gb, 32); /* next off */
1833 skip_bits(&s->gb, 32); /* quant off */
1834 skip_bits(&s->gb, 32); /* huff off */
1835 skip_bits(&s->gb, 32); /* image off */
1836 skip_bits(&s->gb, 32); /* scan off */
1837 skip_bits(&s->gb, 32); /* data off */
1839 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1840 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1845 /* slow but needed for extreme adobe jpegs */
1847 av_log(s->avctx, AV_LOG_ERROR,
1848 "mjpeg: error, decode_app parser read over the end\n");
1850 skip_bits(&s->gb, 8);
1855 static int mjpeg_decode_com(MJpegDecodeContext *s)
1857 int len = get_bits(&s->gb, 16);
1858 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1859 char *cbuf = av_malloc(len - 1);
1862 for (i = 0; i < len - 2; i++)
1863 cbuf[i] = get_bits(&s->gb, 8);
1864 if (i > 0 && cbuf[i - 1] == '\n')
1869 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1870 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1872 /* buggy avid, it puts EOI only at every 10th frame */
1873 if (!strncmp(cbuf, "AVID", 4)) {
1874 parse_avid(s, cbuf, len);
1875 } else if (!strcmp(cbuf, "CS=ITU601"))
1877 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
1878 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1880 else if (!strcmp(cbuf, "MULTISCOPE II")) {
1881 s->avctx->sample_aspect_ratio = (AVRational) { 1, 2 };
1892 /* return the 8 bit start code value and update the search
1893 state. Return -1 if no start code found */
1894 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1896 const uint8_t *buf_ptr;
1901 buf_ptr = *pbuf_ptr;
1902 while (buf_end - buf_ptr > 1) {
1905 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1914 ff_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1915 *pbuf_ptr = buf_ptr;
1919 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1920 const uint8_t **buf_ptr, const uint8_t *buf_end,
1921 const uint8_t **unescaped_buf_ptr,
1922 int *unescaped_buf_size)
1925 start_code = find_marker(buf_ptr, buf_end);
1927 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1929 return AVERROR(ENOMEM);
1931 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1932 if (start_code == SOS && !s->ls) {
1933 const uint8_t *src = *buf_ptr;
1934 const uint8_t *ptr = src;
1935 uint8_t *dst = s->buffer;
1937 #define copy_data_segment(skip) do { \
1938 ptrdiff_t length = (ptr - src) - (skip); \
1940 memcpy(dst, src, length); \
1946 if (s->avctx->codec_id == AV_CODEC_ID_THP) {
1948 copy_data_segment(0);
1950 while (ptr < buf_end) {
1951 uint8_t x = *(ptr++);
1955 while (ptr < buf_end && x == 0xff) {
1960 /* 0xFF, 0xFF, ... */
1962 copy_data_segment(skip);
1964 /* decrement src as it is equal to ptr after the
1965 * copy_data_segment macro and we might want to
1966 * copy the current value of x later on */
1970 if (x < 0xd0 || x > 0xd7) {
1971 copy_data_segment(1);
1978 copy_data_segment(0);
1980 #undef copy_data_segment
1982 *unescaped_buf_ptr = s->buffer;
1983 *unescaped_buf_size = dst - s->buffer;
1984 memset(s->buffer + *unescaped_buf_size, 0,
1985 AV_INPUT_BUFFER_PADDING_SIZE);
1987 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
1988 (buf_end - *buf_ptr) - (dst - s->buffer));
1989 } else if (start_code == SOS && s->ls) {
1990 const uint8_t *src = *buf_ptr;
1991 uint8_t *dst = s->buffer;
1997 while (src + t < buf_end) {
1998 uint8_t x = src[t++];
2000 while ((src + t < buf_end) && x == 0xff)
2009 init_put_bits(&pb, dst, t);
2011 /* unescape bitstream */
2013 uint8_t x = src[b++];
2014 put_bits(&pb, 8, x);
2015 if (x == 0xFF && b < t) {
2018 av_log(s->avctx, AV_LOG_WARNING, "Invalid escape sequence\n");
2021 put_bits(&pb, 7, x);
2025 flush_put_bits(&pb);
2027 *unescaped_buf_ptr = dst;
2028 *unescaped_buf_size = (bit_count + 7) >> 3;
2029 memset(s->buffer + *unescaped_buf_size, 0,
2030 AV_INPUT_BUFFER_PADDING_SIZE);
2032 *unescaped_buf_ptr = *buf_ptr;
2033 *unescaped_buf_size = buf_end - *buf_ptr;
2039 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
2042 AVFrame *frame = data;
2043 const uint8_t *buf = avpkt->data;
2044 int buf_size = avpkt->size;
2045 MJpegDecodeContext *s = avctx->priv_data;
2046 const uint8_t *buf_end, *buf_ptr;
2047 const uint8_t *unescaped_buf_ptr;
2049 int unescaped_buf_size;
2055 av_dict_free(&s->exif_metadata);
2056 av_freep(&s->stereo3d);
2057 s->adobe_transform = -1;
2060 buf_end = buf + buf_size;
2061 while (buf_ptr < buf_end) {
2062 /* find start next marker */
2063 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
2065 &unescaped_buf_size);
2067 if (start_code < 0) {
2069 } else if (unescaped_buf_size > INT_MAX / 8) {
2070 av_log(avctx, AV_LOG_ERROR,
2071 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
2072 start_code, unescaped_buf_size, buf_size);
2073 return AVERROR_INVALIDDATA;
2075 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
2076 start_code, buf_end - buf_ptr);
2078 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
2081 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
2085 s->start_code = start_code;
2086 if (s->avctx->debug & FF_DEBUG_STARTCODE)
2087 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
2089 /* process markers */
2090 if (start_code >= 0xd0 && start_code <= 0xd7)
2091 av_log(avctx, AV_LOG_DEBUG,
2092 "restart marker: %d\n", start_code & 0x0f);
2094 else if (start_code >= APP0 && start_code <= APP15)
2095 mjpeg_decode_app(s);
2097 else if (start_code == COM)
2098 mjpeg_decode_com(s);
2102 if (!CONFIG_JPEGLS_DECODER &&
2103 (start_code == SOF48 || start_code == LSE)) {
2104 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
2105 return AVERROR(ENOSYS);
2108 if (avctx->skip_frame == AVDISCARD_ALL) {
2109 switch(start_code) {
2124 switch (start_code) {
2126 s->restart_interval = 0;
2127 s->restart_count = 0;
2128 /* nothing to do on SOI */
2131 ff_mjpeg_decode_dqt(s);
2134 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
2135 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
2144 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2151 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2155 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2159 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2163 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2167 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2171 if (!CONFIG_JPEGLS_DECODER ||
2172 (ret = ff_jpegls_decode_lse(s)) < 0)
2178 if (!s->got_picture) {
2179 av_log(avctx, AV_LOG_WARNING,
2180 "Found EOI before any SOF, ignoring\n");
2183 if (s->interlaced) {
2184 s->bottom_field ^= 1;
2185 /* if not bottom field, do not output image yet */
2186 if (s->bottom_field == !s->interlace_polarity)
2189 if (avctx->skip_frame == AVDISCARD_ALL) {
2191 goto the_end_no_picture;
2193 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2199 int qp = FFMAX3(s->qscale[0],
2202 int qpw = (s->width + 15) / 16;
2203 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2205 memset(qp_table_buf->data, qp, qpw);
2206 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2209 if(avctx->debug & FF_DEBUG_QP)
2210 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2216 if (avctx->skip_frame == AVDISCARD_ALL)
2219 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2220 (avctx->err_recognition & AV_EF_EXPLODE))
2224 mjpeg_decode_dri(s);
2236 av_log(avctx, AV_LOG_ERROR,
2237 "mjpeg: unsupported coding type (%x)\n", start_code);
2242 /* eof process start code */
2243 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2244 av_log(avctx, AV_LOG_DEBUG,
2245 "marker parser used %d bytes (%d bits)\n",
2246 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2248 if (s->got_picture && s->cur_scan) {
2249 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2252 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2253 return AVERROR_INVALIDDATA;
2259 is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step > 1;
2261 if (AV_RB32(s->upscale_h)) {
2263 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2264 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2265 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2266 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2267 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2268 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2269 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2270 avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2271 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2272 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2273 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2274 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2276 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2277 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2278 for (p = 0; p<s->nb_components; p++) {
2279 uint8_t *line = s->picture_ptr->data[p];
2282 if (!s->upscale_h[p])
2285 w = AV_CEIL_RSHIFT(w, hshift);
2286 h = AV_CEIL_RSHIFT(h, vshift);
2288 if (s->upscale_v[p])
2291 for (i = 0; i < h; i++) {
2292 if (s->upscale_h[p] == 1) {
2293 if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2294 else line[w - 1] = line[(w - 1) / 2];
2295 for (index = w - 2; index > 0; index--) {
2297 ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2299 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2301 } else if (s->upscale_h[p] == 2) {
2303 ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 3];
2305 ((uint16_t*)line)[w - 2] = ((uint16_t*)line)[w - 1];
2307 line[w - 1] = line[(w - 1) / 3];
2309 line[w - 2] = line[w - 1];
2311 for (index = w - 3; index > 0; index--) {
2312 line[index] = (line[index / 3] + line[(index + 1) / 3] + line[(index + 2) / 3] + 1) / 3;
2315 line += s->linesize[p];
2319 if (AV_RB32(s->upscale_v)) {
2321 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2322 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2323 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2324 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2325 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2326 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2327 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2328 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2329 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2330 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2331 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2332 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2333 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2335 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2336 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2337 for (p = 0; p < s->nb_components; p++) {
2341 if (!s->upscale_v[p])
2344 w = AV_CEIL_RSHIFT(w, hshift);
2345 h = AV_CEIL_RSHIFT(h, vshift);
2347 dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2348 for (i = h - 1; i; i--) {
2349 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2350 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2351 if (src1 == src2 || i == h - 1) {
2352 memcpy(dst, src1, w);
2354 for (index = 0; index < w; index++)
2355 dst[index] = (src1[index] + src2[index]) >> 1;
2357 dst -= s->linesize[p];
2363 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2364 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2365 for (index=0; index<s->nb_components; index++) {
2366 uint8_t *dst = s->picture_ptr->data[index];
2367 int w = s->picture_ptr->width;
2368 int h = s->picture_ptr->height;
2369 if(index && index<3){
2370 w = AV_CEIL_RSHIFT(w, hshift);
2371 h = AV_CEIL_RSHIFT(h, vshift);
2374 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2375 for (i=0; i<h/2; i++) {
2377 FFSWAP(int, dst[j], dst2[j]);
2378 dst += s->picture_ptr->linesize[index];
2379 dst2 -= s->picture_ptr->linesize[index];
2384 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2385 int w = s->picture_ptr->width;
2386 int h = s->picture_ptr->height;
2387 av_assert0(s->nb_components == 4);
2388 for (i=0; i<h; i++) {
2391 for (index=0; index<4; index++) {
2392 dst[index] = s->picture_ptr->data[index]
2393 + s->picture_ptr->linesize[index]*i;
2395 for (j=0; j<w; j++) {
2397 int r = dst[0][j] * k;
2398 int g = dst[1][j] * k;
2399 int b = dst[2][j] * k;
2400 dst[0][j] = g*257 >> 16;
2401 dst[1][j] = b*257 >> 16;
2402 dst[2][j] = r*257 >> 16;
2407 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2408 int w = s->picture_ptr->width;
2409 int h = s->picture_ptr->height;
2410 av_assert0(s->nb_components == 4);
2411 for (i=0; i<h; i++) {
2414 for (index=0; index<4; index++) {
2415 dst[index] = s->picture_ptr->data[index]
2416 + s->picture_ptr->linesize[index]*i;
2418 for (j=0; j<w; j++) {
2420 int r = (255 - dst[0][j]) * k;
2421 int g = (128 - dst[1][j]) * k;
2422 int b = (128 - dst[2][j]) * k;
2423 dst[0][j] = r*257 >> 16;
2424 dst[1][j] = (g*257 >> 16) + 128;
2425 dst[2][j] = (b*257 >> 16) + 128;
2432 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2434 stereo->type = s->stereo3d->type;
2435 stereo->flags = s->stereo3d->flags;
2437 av_freep(&s->stereo3d);
2440 av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
2441 av_dict_free(&s->exif_metadata);
2444 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2446 // return buf_end - buf_ptr;
2447 return buf_ptr - buf;
2450 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2452 MJpegDecodeContext *s = avctx->priv_data;
2455 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2456 av_log(avctx, AV_LOG_INFO, "Single field\n");
2460 av_frame_free(&s->picture);
2461 s->picture_ptr = NULL;
2462 } else if (s->picture_ptr)
2463 av_frame_unref(s->picture_ptr);
2465 av_freep(&s->buffer);
2466 av_freep(&s->stereo3d);
2467 av_freep(&s->ljpeg_buffer);
2468 s->ljpeg_buffer_size = 0;
2470 for (i = 0; i < 3; i++) {
2471 for (j = 0; j < 4; j++)
2472 ff_free_vlc(&s->vlcs[i][j]);
2474 for (i = 0; i < MAX_COMPONENTS; i++) {
2475 av_freep(&s->blocks[i]);
2476 av_freep(&s->last_nnz[i]);
2478 av_dict_free(&s->exif_metadata);
2482 static void decode_flush(AVCodecContext *avctx)
2484 MJpegDecodeContext *s = avctx->priv_data;
2488 #if CONFIG_MJPEG_DECODER
2489 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2490 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2491 static const AVOption options[] = {
2492 { "extern_huff", "Use external huffman table.",
2493 OFFSET(extern_huff), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
2497 static const AVClass mjpegdec_class = {
2498 .class_name = "MJPEG decoder",
2499 .item_name = av_default_item_name,
2501 .version = LIBAVUTIL_VERSION_INT,
2504 AVCodec ff_mjpeg_decoder = {
2506 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2507 .type = AVMEDIA_TYPE_VIDEO,
2508 .id = AV_CODEC_ID_MJPEG,
2509 .priv_data_size = sizeof(MJpegDecodeContext),
2510 .init = ff_mjpeg_decode_init,
2511 .close = ff_mjpeg_decode_end,
2512 .decode = ff_mjpeg_decode_frame,
2513 .flush = decode_flush,
2514 .capabilities = AV_CODEC_CAP_DR1,
2516 .priv_class = &mjpegdec_class,
2517 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
2518 FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2521 #if CONFIG_THP_DECODER
2522 AVCodec ff_thp_decoder = {
2524 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2525 .type = AVMEDIA_TYPE_VIDEO,
2526 .id = AV_CODEC_ID_THP,
2527 .priv_data_size = sizeof(MJpegDecodeContext),
2528 .init = ff_mjpeg_decode_init,
2529 .close = ff_mjpeg_decode_end,
2530 .decode = ff_mjpeg_decode_frame,
2531 .flush = decode_flush,
2532 .capabilities = AV_CODEC_CAP_DR1,
2534 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,