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Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / mjpegdec.c
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CommitLineData
1/*
2 * MJPEG decoder
3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2003 Alex Beregszaszi
5 * Copyright (c) 2003-2004 Michael Niedermayer
6 *
7 * Support for external huffman table, various fixes (AVID workaround),
8 * aspecting, new decode_frame mechanism and apple mjpeg-b support
9 * by Alex Beregszaszi
10 *
11 * This file is part of FFmpeg.
12 *
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.
17 *
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.
22 *
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
26 */
27
28/**
29 * @file
30 * MJPEG decoder.
31 */
32
33#include "libavutil/imgutils.h"
34#include "libavutil/avassert.h"
35#include "libavutil/opt.h"
36#include "avcodec.h"
37#include "blockdsp.h"
38#include "copy_block.h"
39#include "idctdsp.h"
40#include "internal.h"
41#include "mjpeg.h"
42#include "mjpegdec.h"
43#include "jpeglsdec.h"
44#include "tiff.h"
45#include "exif.h"
46#include "bytestream.h"
47
48
49static int build_vlc(VLC *vlc, const uint8_t *bits_table,
50 const uint8_t *val_table, int nb_codes,
51 int use_static, int is_ac)
52{
53 uint8_t huff_size[256] = { 0 };
54 uint16_t huff_code[256];
55 uint16_t huff_sym[256];
56 int i;
57
58 av_assert0(nb_codes <= 256);
59
60 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
61
62 for (i = 0; i < 256; i++)
63 huff_sym[i] = i + 16 * is_ac;
64
65 if (is_ac)
66 huff_sym[0] = 16 * 256;
67
68 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
69 huff_code, 2, 2, huff_sym, 2, 2, use_static);
70}
71
72static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
73{
74 build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
75 avpriv_mjpeg_val_dc, 12, 0, 0);
76 build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
77 avpriv_mjpeg_val_dc, 12, 0, 0);
78 build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
79 avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
80 build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
81 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
82 build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
83 avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
84 build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
85 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
86}
87
88static void parse_avid(MJpegDecodeContext *s, uint8_t *buf, int len)
89{
90 s->buggy_avid = 1;
91 if (len > 14 && buf[12] == 1) /* 1 - NTSC */
92 s->interlace_polarity = 1;
93 if (len > 14 && buf[12] == 2) /* 2 - PAL */
94 s->interlace_polarity = 0;
95 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
96 av_log(s->avctx, AV_LOG_INFO, "AVID: len:%d %d\n", len, len > 14 ? buf[12] : -1);
97}
98
99av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
100{
101 MJpegDecodeContext *s = avctx->priv_data;
102
103 if (!s->picture_ptr) {
104 s->picture = av_frame_alloc();
105 if (!s->picture)
106 return AVERROR(ENOMEM);
107 s->picture_ptr = s->picture;
108 }
109
110 s->avctx = avctx;
111 ff_blockdsp_init(&s->bdsp, avctx);
112 ff_hpeldsp_init(&s->hdsp, avctx->flags);
113 ff_idctdsp_init(&s->idsp, avctx);
114 ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
115 ff_zigzag_direct);
116 s->buffer_size = 0;
117 s->buffer = NULL;
118 s->start_code = -1;
119 s->first_picture = 1;
120 s->got_picture = 0;
121 s->org_height = avctx->coded_height;
122 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
123 avctx->colorspace = AVCOL_SPC_BT470BG;
124
125 build_basic_mjpeg_vlc(s);
126
127 if (s->extern_huff) {
128 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
129 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
130 if (ff_mjpeg_decode_dht(s)) {
131 av_log(avctx, AV_LOG_ERROR,
132 "error using external huffman table, switching back to internal\n");
133 build_basic_mjpeg_vlc(s);
134 }
135 }
136 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
137 s->interlace_polarity = 1; /* bottom field first */
138 av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
139 } else if (avctx->field_order == AV_FIELD_UNKNOWN) {
140 if (avctx->codec_tag == AV_RL32("MJPG"))
141 s->interlace_polarity = 1;
142 }
143
144 if ( avctx->extradata_size > 8
145 && AV_RL32(avctx->extradata) == 0x2C
146 && AV_RL32(avctx->extradata+4) == 0x18) {
147 parse_avid(s, avctx->extradata, avctx->extradata_size);
148 }
149
150 if (avctx->codec->id == AV_CODEC_ID_AMV)
151 s->flipped = 1;
152
153 return 0;
154}
155
156
157/* quantize tables */
158int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
159{
160 int len, index, i, j;
161
162 len = get_bits(&s->gb, 16) - 2;
163
164 while (len >= 65) {
165 int pr = get_bits(&s->gb, 4);
166 if (pr > 1) {
167 av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
168 return AVERROR_INVALIDDATA;
169 }
170 index = get_bits(&s->gb, 4);
171 if (index >= 4)
172 return -1;
173 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
174 /* read quant table */
175 for (i = 0; i < 64; i++) {
176 j = s->scantable.permutated[i];
177 s->quant_matrixes[index][j] = get_bits(&s->gb, pr ? 16 : 8);
178 }
179
180 // XXX FIXME finetune, and perhaps add dc too
181 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
182 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
183 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
184 index, s->qscale[index]);
185 len -= 65;
186 }
187 return 0;
188}
189
190/* decode huffman tables and build VLC decoders */
191int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
192{
193 int len, index, i, class, n, v, code_max;
194 uint8_t bits_table[17];
195 uint8_t val_table[256];
196 int ret = 0;
197
198 len = get_bits(&s->gb, 16) - 2;
199
200 while (len > 0) {
201 if (len < 17)
202 return AVERROR_INVALIDDATA;
203 class = get_bits(&s->gb, 4);
204 if (class >= 2)
205 return AVERROR_INVALIDDATA;
206 index = get_bits(&s->gb, 4);
207 if (index >= 4)
208 return AVERROR_INVALIDDATA;
209 n = 0;
210 for (i = 1; i <= 16; i++) {
211 bits_table[i] = get_bits(&s->gb, 8);
212 n += bits_table[i];
213 }
214 len -= 17;
215 if (len < n || n > 256)
216 return AVERROR_INVALIDDATA;
217
218 code_max = 0;
219 for (i = 0; i < n; i++) {
220 v = get_bits(&s->gb, 8);
221 if (v > code_max)
222 code_max = v;
223 val_table[i] = v;
224 }
225 len -= n;
226
227 /* build VLC and flush previous vlc if present */
228 ff_free_vlc(&s->vlcs[class][index]);
229 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
230 class, index, code_max + 1);
231 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
232 code_max + 1, 0, class > 0)) < 0)
233 return ret;
234
235 if (class > 0) {
236 ff_free_vlc(&s->vlcs[2][index]);
237 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
238 code_max + 1, 0, 0)) < 0)
239 return ret;
240 }
241 }
242 return 0;
243}
244
245int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
246{
247 int len, nb_components, i, width, height, bits, ret;
248 unsigned pix_fmt_id;
249 int h_count[MAX_COMPONENTS];
250 int v_count[MAX_COMPONENTS];
251
252 s->cur_scan = 0;
253 s->upscale_h = s->upscale_v = 0;
254
255 /* XXX: verify len field validity */
256 len = get_bits(&s->gb, 16);
257 s->avctx->bits_per_raw_sample =
258 bits = get_bits(&s->gb, 8);
259
260 if (bits > 16 || bits < 1) {
261 av_log(s->avctx, AV_LOG_ERROR, "bits %d is invalid\n", bits);
262 return AVERROR_INVALIDDATA;
263 }
264
265 if (s->pegasus_rct)
266 bits = 9;
267 if (bits == 9 && !s->pegasus_rct)
268 s->rct = 1; // FIXME ugly
269
270 if(s->lossless && s->avctx->lowres){
271 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
272 return -1;
273 }
274
275 height = get_bits(&s->gb, 16);
276 width = get_bits(&s->gb, 16);
277
278 if (s->avctx->codec_id == AV_CODEC_ID_AMV && (height&15))
279 avpriv_request_sample(s->avctx, "non mod 16 height AMV\n");
280
281 // HACK for odd_height.mov
282 if (s->interlaced && s->width == width && s->height == height + 1)
283 height= s->height;
284
285 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
286 if (av_image_check_size(width, height, 0, s->avctx))
287 return AVERROR_INVALIDDATA;
288
289 nb_components = get_bits(&s->gb, 8);
290 if (nb_components <= 0 ||
291 nb_components > MAX_COMPONENTS)
292 return -1;
293 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
294 if (nb_components != s->nb_components) {
295 av_log(s->avctx, AV_LOG_ERROR,
296 "nb_components changing in interlaced picture\n");
297 return AVERROR_INVALIDDATA;
298 }
299 }
300 if (s->ls && !(bits <= 8 || nb_components == 1)) {
301 avpriv_report_missing_feature(s->avctx,
302 "JPEG-LS that is not <= 8 "
303 "bits/component or 16-bit gray");
304 return AVERROR_PATCHWELCOME;
305 }
306 s->nb_components = nb_components;
307 s->h_max = 1;
308 s->v_max = 1;
309 memset(h_count, 0, sizeof(h_count));
310 memset(v_count, 0, sizeof(v_count));
311 for (i = 0; i < nb_components; i++) {
312 /* component id */
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;
325 }
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;
331 }
332
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]);
336 }
337
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;
341 }
342
343
344 /* if different size, realloc/alloc picture */
345 if ( width != s->width || height != s->height
346 || bits != s->bits
347 || memcmp(s->h_count, h_count, sizeof(h_count))
348 || memcmp(s->v_count, v_count, sizeof(v_count))) {
349
350 s->width = width;
351 s->height = height;
352 s->bits = bits;
353 memcpy(s->h_count, h_count, sizeof(h_count));
354 memcpy(s->v_count, v_count, sizeof(v_count));
355 s->interlaced = 0;
356 s->got_picture = 0;
357
358 /* test interlaced mode */
359 if (s->first_picture &&
360 s->org_height != 0 &&
361 s->height < ((s->org_height * 3) / 4)) {
362 s->interlaced = 1;
363 s->bottom_field = s->interlace_polarity;
364 s->picture_ptr->interlaced_frame = 1;
365 s->picture_ptr->top_field_first = !s->interlace_polarity;
366 height *= 2;
367 }
368
369 ret = ff_set_dimensions(s->avctx, width, height);
370 if (ret < 0)
371 return ret;
372
373 s->first_picture = 0;
374 }
375
376 if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
377 if (s->progressive) {
378 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
379 return AVERROR_INVALIDDATA;
380 }
381 } else{
382 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
383 s->rgb = 1;
384 else if (!s->lossless)
385 s->rgb = 0;
386 /* XXX: not complete test ! */
387 pix_fmt_id = ((unsigned)s->h_count[0] << 28) | (s->v_count[0] << 24) |
388 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
389 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
390 (s->h_count[3] << 4) | s->v_count[3];
391 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
392 /* NOTE we do not allocate pictures large enough for the possible
393 * padding of h/v_count being 4 */
394 if (!(pix_fmt_id & 0xD0D0D0D0))
395 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
396 if (!(pix_fmt_id & 0x0D0D0D0D))
397 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
398
399 for (i = 0; i < 8; i++) {
400 int j = 6 + (i&1) - (i&6);
401 int is = (pix_fmt_id >> (4*i)) & 0xF;
402 int js = (pix_fmt_id >> (4*j)) & 0xF;
403
404 if (is == 1 && js != 2 && (i < 2 || i > 5))
405 js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
406 if (is == 1 && js != 2 && (i < 2 || i > 5))
407 js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
408
409 if (is == 1 && js == 2) {
410 if (i & 1) s->upscale_h |= 1 << (j/2);
411 else s->upscale_v |= 1 << (j/2);
412 }
413 }
414
415 switch (pix_fmt_id) {
416 case 0x11111100:
417 if (s->rgb)
418 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
419 else {
420 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
421 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
422 } else {
423 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
424 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
425 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
426 }
427 }
428 av_assert0(s->nb_components == 3);
429 break;
430 case 0x11111111:
431 if (s->rgb)
432 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
433 else {
434 if (s->adobe_transform == 0 && s->bits <= 8) {
435 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
436 } else {
437 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
438 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
439 }
440 }
441 av_assert0(s->nb_components == 4);
442 break;
443 case 0x22111122:
444 case 0x22111111:
445 if (s->adobe_transform == 0 && s->bits <= 8) {
446 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
447 s->upscale_v |= 6;
448 s->upscale_h |= 6;
449 } else if (s->adobe_transform == 2 && s->bits <= 8) {
450 s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
451 s->upscale_v |= 6;
452 s->upscale_h |= 6;
453 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
454 } else {
455 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
456 else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
457 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
458 }
459 av_assert0(s->nb_components == 4);
460 break;
461 case 0x12121100:
462 case 0x22122100:
463 case 0x21211100:
464 case 0x22211200:
465 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
466 else
467 goto unk_pixfmt;
468 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
469 break;
470 case 0x22221100:
471 case 0x22112200:
472 case 0x11222200:
473 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
474 else
475 goto unk_pixfmt;
476 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
477 break;
478 case 0x11000000:
479 case 0x13000000:
480 case 0x14000000:
481 case 0x31000000:
482 case 0x33000000:
483 case 0x34000000:
484 case 0x41000000:
485 case 0x43000000:
486 case 0x44000000:
487 if(s->bits <= 8)
488 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
489 else
490 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
491 break;
492 case 0x12111100:
493 case 0x14121200:
494 case 0x14111100:
495 case 0x22211100:
496 case 0x22112100:
497 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
498 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
499 else
500 goto unk_pixfmt;
501 s->upscale_v |= 3;
502 } else {
503 if (pix_fmt_id == 0x14111100)
504 s->upscale_v |= 6;
505 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
506 else
507 goto unk_pixfmt;
508 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
509 }
510 break;
511 case 0x21111100:
512 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
513 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
514 else
515 goto unk_pixfmt;
516 s->upscale_h |= 3;
517 } else {
518 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
519 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
520 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
521 }
522 break;
523 case 0x22121100:
524 case 0x22111200:
525 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
526 else
527 goto unk_pixfmt;
528 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
529 break;
530 case 0x22111100:
531 case 0x42111100:
532 case 0x24111100:
533 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
534 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
535 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
536 if (pix_fmt_id == 0x42111100) {
537 if (s->bits > 8)
538 goto unk_pixfmt;
539 s->upscale_h = 6;
540 } else if (pix_fmt_id == 0x24111100) {
541 if (s->bits > 8)
542 goto unk_pixfmt;
543 s->upscale_v = 6;
544 }
545 break;
546 case 0x41111100:
547 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
548 else
549 goto unk_pixfmt;
550 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
551 break;
552 default:
553unk_pixfmt:
554 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x bits:%d\n", pix_fmt_id, s->bits);
555 s->upscale_h = s->upscale_v = 0;
556 return AVERROR_PATCHWELCOME;
557 }
558 if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
559 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
560 return AVERROR_PATCHWELCOME;
561 }
562 if (s->ls) {
563 s->upscale_h = s->upscale_v = 0;
564 if (s->nb_components > 1)
565 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
566 else if (s->palette_index && s->bits <= 8)
567 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
568 else if (s->bits <= 8)
569 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
570 else
571 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
572 }
573
574 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
575 if (!s->pix_desc) {
576 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
577 return AVERROR_BUG;
578 }
579
580 av_frame_unref(s->picture_ptr);
581 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
582 return -1;
583 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
584 s->picture_ptr->key_frame = 1;
585 s->got_picture = 1;
586
587 for (i = 0; i < 4; i++)
588 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
589
590 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
591 s->width, s->height, s->linesize[0], s->linesize[1],
592 s->interlaced, s->avctx->height);
593
594 if (len != (8 + (3 * nb_components)))
595 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
596 }
597
598 if (s->rgb && !s->lossless && !s->ls) {
599 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
600 return AVERROR_PATCHWELCOME;
601 }
602
603 /* totally blank picture as progressive JPEG will only add details to it */
604 if (s->progressive) {
605 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
606 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
607 for (i = 0; i < s->nb_components; i++) {
608 int size = bw * bh * s->h_count[i] * s->v_count[i];
609 av_freep(&s->blocks[i]);
610 av_freep(&s->last_nnz[i]);
611 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
612 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
613 if (!s->blocks[i] || !s->last_nnz[i])
614 return AVERROR(ENOMEM);
615 s->block_stride[i] = bw * s->h_count[i];
616 }
617 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
618 }
619 return 0;
620}
621
622static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
623{
624 int code;
625 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
626 if (code < 0 || code > 16) {
627 av_log(s->avctx, AV_LOG_WARNING,
628 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
629 0, dc_index, &s->vlcs[0][dc_index]);
630 return 0xfffff;
631 }
632
633 if (code)
634 return get_xbits(&s->gb, code);
635 else
636 return 0;
637}
638
639/* decode block and dequantize */
640static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
641 int dc_index, int ac_index, int16_t *quant_matrix)
642{
643 int code, i, j, level, val;
644
645 /* DC coef */
646 val = mjpeg_decode_dc(s, dc_index);
647 if (val == 0xfffff) {
648 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
649 return AVERROR_INVALIDDATA;
650 }
651 val = val * quant_matrix[0] + s->last_dc[component];
652 s->last_dc[component] = val;
653 block[0] = val;
654 /* AC coefs */
655 i = 0;
656 {OPEN_READER(re, &s->gb);
657 do {
658 UPDATE_CACHE(re, &s->gb);
659 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
660
661 i += ((unsigned)code) >> 4;
662 code &= 0xf;
663 if (code) {
664 if (code > MIN_CACHE_BITS - 16)
665 UPDATE_CACHE(re, &s->gb);
666
667 {
668 int cache = GET_CACHE(re, &s->gb);
669 int sign = (~cache) >> 31;
670 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
671 }
672
673 LAST_SKIP_BITS(re, &s->gb, code);
674
675 if (i > 63) {
676 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
677 return AVERROR_INVALIDDATA;
678 }
679 j = s->scantable.permutated[i];
680 block[j] = level * quant_matrix[j];
681 }
682 } while (i < 63);
683 CLOSE_READER(re, &s->gb);}
684
685 return 0;
686}
687
688static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
689 int component, int dc_index,
690 int16_t *quant_matrix, int Al)
691{
692 int val;
693 s->bdsp.clear_block(block);
694 val = mjpeg_decode_dc(s, dc_index);
695 if (val == 0xfffff) {
696 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
697 return AVERROR_INVALIDDATA;
698 }
699 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
700 s->last_dc[component] = val;
701 block[0] = val;
702 return 0;
703}
704
705/* decode block and dequantize - progressive JPEG version */
706static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
707 uint8_t *last_nnz, int ac_index,
708 int16_t *quant_matrix,
709 int ss, int se, int Al, int *EOBRUN)
710{
711 int code, i, j, level, val, run;
712
713 if (*EOBRUN) {
714 (*EOBRUN)--;
715 return 0;
716 }
717
718 {
719 OPEN_READER(re, &s->gb);
720 for (i = ss; ; i++) {
721 UPDATE_CACHE(re, &s->gb);
722 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
723
724 run = ((unsigned) code) >> 4;
725 code &= 0xF;
726 if (code) {
727 i += run;
728 if (code > MIN_CACHE_BITS - 16)
729 UPDATE_CACHE(re, &s->gb);
730
731 {
732 int cache = GET_CACHE(re, &s->gb);
733 int sign = (~cache) >> 31;
734 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
735 }
736
737 LAST_SKIP_BITS(re, &s->gb, code);
738
739 if (i >= se) {
740 if (i == se) {
741 j = s->scantable.permutated[se];
742 block[j] = level * quant_matrix[j] << Al;
743 break;
744 }
745 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
746 return AVERROR_INVALIDDATA;
747 }
748 j = s->scantable.permutated[i];
749 block[j] = level * quant_matrix[j] << Al;
750 } else {
751 if (run == 0xF) {// ZRL - skip 15 coefficients
752 i += 15;
753 if (i >= se) {
754 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
755 return AVERROR_INVALIDDATA;
756 }
757 } else {
758 val = (1 << run);
759 if (run) {
760 UPDATE_CACHE(re, &s->gb);
761 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
762 LAST_SKIP_BITS(re, &s->gb, run);
763 }
764 *EOBRUN = val - 1;
765 break;
766 }
767 }
768 }
769 CLOSE_READER(re, &s->gb);
770 }
771
772 if (i > *last_nnz)
773 *last_nnz = i;
774
775 return 0;
776}
777
778#define REFINE_BIT(j) { \
779 UPDATE_CACHE(re, &s->gb); \
780 sign = block[j] >> 15; \
781 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
782 ((quant_matrix[j] ^ sign) - sign) << Al; \
783 LAST_SKIP_BITS(re, &s->gb, 1); \
784}
785
786#define ZERO_RUN \
787for (; ; i++) { \
788 if (i > last) { \
789 i += run; \
790 if (i > se) { \
791 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
792 return -1; \
793 } \
794 break; \
795 } \
796 j = s->scantable.permutated[i]; \
797 if (block[j]) \
798 REFINE_BIT(j) \
799 else if (run-- == 0) \
800 break; \
801}
802
803/* decode block and dequantize - progressive JPEG refinement pass */
804static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
805 uint8_t *last_nnz,
806 int ac_index, int16_t *quant_matrix,
807 int ss, int se, int Al, int *EOBRUN)
808{
809 int code, i = ss, j, sign, val, run;
810 int last = FFMIN(se, *last_nnz);
811
812 OPEN_READER(re, &s->gb);
813 if (*EOBRUN) {
814 (*EOBRUN)--;
815 } else {
816 for (; ; i++) {
817 UPDATE_CACHE(re, &s->gb);
818 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
819
820 if (code & 0xF) {
821 run = ((unsigned) code) >> 4;
822 UPDATE_CACHE(re, &s->gb);
823 val = SHOW_UBITS(re, &s->gb, 1);
824 LAST_SKIP_BITS(re, &s->gb, 1);
825 ZERO_RUN;
826 j = s->scantable.permutated[i];
827 val--;
828 block[j] = ((quant_matrix[j]^val) - val) << Al;
829 if (i == se) {
830 if (i > *last_nnz)
831 *last_nnz = i;
832 CLOSE_READER(re, &s->gb);
833 return 0;
834 }
835 } else {
836 run = ((unsigned) code) >> 4;
837 if (run == 0xF) {
838 ZERO_RUN;
839 } else {
840 val = run;
841 run = (1 << run);
842 if (val) {
843 UPDATE_CACHE(re, &s->gb);
844 run += SHOW_UBITS(re, &s->gb, val);
845 LAST_SKIP_BITS(re, &s->gb, val);
846 }
847 *EOBRUN = run - 1;
848 break;
849 }
850 }
851 }
852
853 if (i > *last_nnz)
854 *last_nnz = i;
855 }
856
857 for (; i <= last; i++) {
858 j = s->scantable.permutated[i];
859 if (block[j])
860 REFINE_BIT(j)
861 }
862 CLOSE_READER(re, &s->gb);
863
864 return 0;
865}
866#undef REFINE_BIT
867#undef ZERO_RUN
868
869static int handle_rstn(MJpegDecodeContext *s, int nb_components)
870{
871 int i;
872 int reset = 0;
873
874 if (s->restart_interval) {
875 s->restart_count--;
876 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
877 align_get_bits(&s->gb);
878 for (i = 0; i < nb_components; i++) /* reset dc */
879 s->last_dc[i] = (4 << s->bits);
880 }
881
882 i = 8 + ((-get_bits_count(&s->gb)) & 7);
883 /* skip RSTn */
884 if (s->restart_count == 0) {
885 if( show_bits(&s->gb, i) == (1 << i) - 1
886 || show_bits(&s->gb, i) == 0xFF) {
887 int pos = get_bits_count(&s->gb);
888 align_get_bits(&s->gb);
889 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
890 skip_bits(&s->gb, 8);
891 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
892 for (i = 0; i < nb_components; i++) /* reset dc */
893 s->last_dc[i] = (4 << s->bits);
894 reset = 1;
895 } else
896 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
897 }
898 }
899 }
900 return reset;
901}
902
903static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
904{
905 int i, mb_x, mb_y;
906 uint16_t (*buffer)[4];
907 int left[4], top[4], topleft[4];
908 const int linesize = s->linesize[0];
909 const int mask = ((1 << s->bits) - 1) << point_transform;
910 int resync_mb_y = 0;
911 int resync_mb_x = 0;
912
913 if (s->nb_components != 3 && s->nb_components != 4)
914 return AVERROR_INVALIDDATA;
915 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
916 return AVERROR_INVALIDDATA;
917
918
919 s->restart_count = s->restart_interval;
920
921 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
922 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
923 buffer = s->ljpeg_buffer;
924
925 for (i = 0; i < 4; i++)
926 buffer[0][i] = 1 << (s->bits - 1);
927
928 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
929 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
930
931 if (s->interlaced && s->bottom_field)
932 ptr += linesize >> 1;
933
934 for (i = 0; i < 4; i++)
935 top[i] = left[i] = topleft[i] = buffer[0][i];
936
937 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
938 int modified_predictor = predictor;
939
940 if (s->restart_interval && !s->restart_count){
941 s->restart_count = s->restart_interval;
942 resync_mb_x = mb_x;
943 resync_mb_y = mb_y;
944 for(i=0; i<4; i++)
945 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
946 }
947 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
948 modified_predictor = 1;
949
950 for (i=0;i<nb_components;i++) {
951 int pred, dc;
952
953 topleft[i] = top[i];
954 top[i] = buffer[mb_x][i];
955
956 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
957
958 dc = mjpeg_decode_dc(s, s->dc_index[i]);
959 if(dc == 0xFFFFF)
960 return -1;
961
962 left[i] = buffer[mb_x][i] =
963 mask & (pred + (dc << point_transform));
964 }
965
966 if (s->restart_interval && !--s->restart_count) {
967 align_get_bits(&s->gb);
968 skip_bits(&s->gb, 16); /* skip RSTn */
969 }
970 }
971 if (s->nb_components == 4) {
972 for(i=0; i<nb_components; i++) {
973 int c= s->comp_index[i];
974 if (s->bits <= 8) {
975 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
976 ptr[4*mb_x+3-c] = buffer[mb_x][i];
977 }
978 } else if(s->bits == 9) {
979 return AVERROR_PATCHWELCOME;
980 } else {
981 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
982 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
983 }
984 }
985 }
986 } else if (s->rct) {
987 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
988 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
989 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
990 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
991 }
992 } else if (s->pegasus_rct) {
993 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
994 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
995 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
996 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
997 }
998 } else {
999 for(i=0; i<nb_components; i++) {
1000 int c= s->comp_index[i];
1001 if (s->bits <= 8) {
1002 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1003 ptr[3*mb_x+2-c] = buffer[mb_x][i];
1004 }
1005 } else if(s->bits == 9) {
1006 return AVERROR_PATCHWELCOME;
1007 } else {
1008 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1009 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
1010 }
1011 }
1012 }
1013 }
1014 }
1015 return 0;
1016}
1017
1018static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1019 int point_transform, int nb_components)
1020{
1021 int i, mb_x, mb_y, mask;
1022 int bits= (s->bits+7)&~7;
1023 int resync_mb_y = 0;
1024 int resync_mb_x = 0;
1025
1026 point_transform += bits - s->bits;
1027 mask = ((1 << s->bits) - 1) << point_transform;
1028
1029 av_assert0(nb_components>=1 && nb_components<=4);
1030
1031 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1032 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1033 if (s->restart_interval && !s->restart_count){
1034 s->restart_count = s->restart_interval;
1035 resync_mb_x = mb_x;
1036 resync_mb_y = mb_y;
1037 }
1038
1039 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1040 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1041 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1042 for (i = 0; i < nb_components; i++) {
1043 uint8_t *ptr;
1044 uint16_t *ptr16;
1045 int n, h, v, x, y, c, j, linesize;
1046 n = s->nb_blocks[i];
1047 c = s->comp_index[i];
1048 h = s->h_scount[i];
1049 v = s->v_scount[i];
1050 x = 0;
1051 y = 0;
1052 linesize= s->linesize[c];
1053
1054 if(bits>8) linesize /= 2;
1055
1056 for(j=0; j<n; j++) {
1057 int pred, dc;
1058
1059 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1060 if(dc == 0xFFFFF)
1061 return -1;
1062 if(bits<=8){
1063 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1064 if(y==0 && toprow){
1065 if(x==0 && leftcol){
1066 pred= 1 << (bits - 1);
1067 }else{
1068 pred= ptr[-1];
1069 }
1070 }else{
1071 if(x==0 && leftcol){
1072 pred= ptr[-linesize];
1073 }else{
1074 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1075 }
1076 }
1077
1078 if (s->interlaced && s->bottom_field)
1079 ptr += linesize >> 1;
1080 pred &= mask;
1081 *ptr= pred + (dc << point_transform);
1082 }else{
1083 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1084 if(y==0 && toprow){
1085 if(x==0 && leftcol){
1086 pred= 1 << (bits - 1);
1087 }else{
1088 pred= ptr16[-1];
1089 }
1090 }else{
1091 if(x==0 && leftcol){
1092 pred= ptr16[-linesize];
1093 }else{
1094 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1095 }
1096 }
1097
1098 if (s->interlaced && s->bottom_field)
1099 ptr16 += linesize >> 1;
1100 pred &= mask;
1101 *ptr16= pred + (dc << point_transform);
1102 }
1103 if (++x == h) {
1104 x = 0;
1105 y++;
1106 }
1107 }
1108 }
1109 } else {
1110 for (i = 0; i < nb_components; i++) {
1111 uint8_t *ptr;
1112 uint16_t *ptr16;
1113 int n, h, v, x, y, c, j, linesize, dc;
1114 n = s->nb_blocks[i];
1115 c = s->comp_index[i];
1116 h = s->h_scount[i];
1117 v = s->v_scount[i];
1118 x = 0;
1119 y = 0;
1120 linesize = s->linesize[c];
1121
1122 if(bits>8) linesize /= 2;
1123
1124 for (j = 0; j < n; j++) {
1125 int pred;
1126
1127 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1128 if(dc == 0xFFFFF)
1129 return -1;
1130 if(bits<=8){
1131 ptr = s->picture_ptr->data[c] +
1132 (linesize * (v * mb_y + y)) +
1133 (h * mb_x + x); //FIXME optimize this crap
1134 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1135
1136 pred &= mask;
1137 *ptr = pred + (dc << point_transform);
1138 }else{
1139 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1140 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1141
1142 pred &= mask;
1143 *ptr16= pred + (dc << point_transform);
1144 }
1145
1146 if (++x == h) {
1147 x = 0;
1148 y++;
1149 }
1150 }
1151 }
1152 }
1153 if (s->restart_interval && !--s->restart_count) {
1154 align_get_bits(&s->gb);
1155 skip_bits(&s->gb, 16); /* skip RSTn */
1156 }
1157 }
1158 }
1159 return 0;
1160}
1161
1162static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1163 uint8_t *dst, const uint8_t *src,
1164 int linesize, int lowres)
1165{
1166 switch (lowres) {
1167 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1168 break;
1169 case 1: copy_block4(dst, src, linesize, linesize, 4);
1170 break;
1171 case 2: copy_block2(dst, src, linesize, linesize, 2);
1172 break;
1173 case 3: *dst = *src;
1174 break;
1175 }
1176}
1177
1178static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1179{
1180 int block_x, block_y;
1181 int size = 8 >> s->avctx->lowres;
1182 if (s->bits > 8) {
1183 for (block_y=0; block_y<size; block_y++)
1184 for (block_x=0; block_x<size; block_x++)
1185 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1186 } else {
1187 for (block_y=0; block_y<size; block_y++)
1188 for (block_x=0; block_x<size; block_x++)
1189 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1190 }
1191}
1192
1193static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1194 int Al, const uint8_t *mb_bitmask,
1195 int mb_bitmask_size,
1196 const AVFrame *reference)
1197{
1198 int i, mb_x, mb_y;
1199 uint8_t *data[MAX_COMPONENTS];
1200 const uint8_t *reference_data[MAX_COMPONENTS];
1201 int linesize[MAX_COMPONENTS];
1202 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1203 int bytes_per_pixel = 1 + (s->bits > 8);
1204
1205 if (mb_bitmask) {
1206 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1207 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1208 return AVERROR_INVALIDDATA;
1209 }
1210 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1211 }
1212
1213 s->restart_count = 0;
1214
1215 for (i = 0; i < nb_components; i++) {
1216 int c = s->comp_index[i];
1217 data[c] = s->picture_ptr->data[c];
1218 reference_data[c] = reference ? reference->data[c] : NULL;
1219 linesize[c] = s->linesize[c];
1220 s->coefs_finished[c] |= 1;
1221 }
1222
1223 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1224 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1225 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1226
1227 if (s->restart_interval && !s->restart_count)
1228 s->restart_count = s->restart_interval;
1229
1230 if (get_bits_left(&s->gb) < 0) {
1231 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1232 -get_bits_left(&s->gb));
1233 return AVERROR_INVALIDDATA;
1234 }
1235 for (i = 0; i < nb_components; i++) {
1236 uint8_t *ptr;
1237 int n, h, v, x, y, c, j;
1238 int block_offset;
1239 n = s->nb_blocks[i];
1240 c = s->comp_index[i];
1241 h = s->h_scount[i];
1242 v = s->v_scount[i];
1243 x = 0;
1244 y = 0;
1245 for (j = 0; j < n; j++) {
1246 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1247 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1248
1249 if (s->interlaced && s->bottom_field)
1250 block_offset += linesize[c] >> 1;
1251 ptr = data[c] + block_offset;
1252 if (!s->progressive) {
1253 if (copy_mb)
1254 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1255 linesize[c], s->avctx->lowres);
1256
1257 else {
1258 s->bdsp.clear_block(s->block);
1259 if (decode_block(s, s->block, i,
1260 s->dc_index[i], s->ac_index[i],
1261 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1262 av_log(s->avctx, AV_LOG_ERROR,
1263 "error y=%d x=%d\n", mb_y, mb_x);
1264 return AVERROR_INVALIDDATA;
1265 }
1266 s->idsp.idct_put(ptr, linesize[c], s->block);
1267 if (s->bits & 7)
1268 shift_output(s, ptr, linesize[c]);
1269 }
1270 } else {
1271 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1272 (h * mb_x + x);
1273 int16_t *block = s->blocks[c][block_idx];
1274 if (Ah)
1275 block[0] += get_bits1(&s->gb) *
1276 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1277 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1278 s->quant_matrixes[s->quant_sindex[i]],
1279 Al) < 0) {
1280 av_log(s->avctx, AV_LOG_ERROR,
1281 "error y=%d x=%d\n", mb_y, mb_x);
1282 return AVERROR_INVALIDDATA;
1283 }
1284 }
1285 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1286 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1287 mb_x, mb_y, x, y, c, s->bottom_field,
1288 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1289 if (++x == h) {
1290 x = 0;
1291 y++;
1292 }
1293 }
1294 }
1295
1296 handle_rstn(s, nb_components);
1297 }
1298 }
1299 return 0;
1300}
1301
1302static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1303 int se, int Ah, int Al)
1304{
1305 int mb_x, mb_y;
1306 int EOBRUN = 0;
1307 int c = s->comp_index[0];
1308 uint8_t *data = s->picture_ptr->data[c];
1309 int linesize = s->linesize[c];
1310 int last_scan = 0;
1311 int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1312 int bytes_per_pixel = 1 + (s->bits > 8);
1313
1314 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1315 if (se < ss || se > 63) {
1316 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1317 return AVERROR_INVALIDDATA;
1318 }
1319
1320 if (!Al) {
1321 // s->coefs_finished is a bitmask for coefficients coded
1322 // ss and se are parameters telling start and end coefficients
1323 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1324 last_scan = !~s->coefs_finished[c];
1325 }
1326
1327 if (s->interlaced && s->bottom_field)
1328 data += linesize >> 1;
1329
1330 s->restart_count = 0;
1331
1332 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1333 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1334 int block_idx = mb_y * s->block_stride[c];
1335 int16_t (*block)[64] = &s->blocks[c][block_idx];
1336 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1337 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1338 int ret;
1339 if (s->restart_interval && !s->restart_count)
1340 s->restart_count = s->restart_interval;
1341
1342 if (Ah)
1343 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1344 quant_matrix, ss, se, Al, &EOBRUN);
1345 else
1346 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1347 quant_matrix, ss, se, Al, &EOBRUN);
1348 if (ret < 0) {
1349 av_log(s->avctx, AV_LOG_ERROR,
1350 "error y=%d x=%d\n", mb_y, mb_x);
1351 return AVERROR_INVALIDDATA;
1352 }
1353
1354 if (last_scan) {
1355 s->idsp.idct_put(ptr, linesize, *block);
1356 if (s->bits & 7)
1357 shift_output(s, ptr, linesize);
1358 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1359 }
1360 if (handle_rstn(s, 0))
1361 EOBRUN = 0;
1362 }
1363 }
1364 return 0;
1365}
1366
1367int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1368 int mb_bitmask_size, const AVFrame *reference)
1369{
1370 int len, nb_components, i, h, v, predictor, point_transform;
1371 int index, id, ret;
1372 const int block_size = s->lossless ? 1 : 8;
1373 int ilv, prev_shift;
1374
1375 if (!s->got_picture) {
1376 av_log(s->avctx, AV_LOG_WARNING,
1377 "Can not process SOS before SOF, skipping\n");
1378 return -1;
1379 }
1380
1381 av_assert0(s->picture_ptr->data[0]);
1382 /* XXX: verify len field validity */
1383 len = get_bits(&s->gb, 16);
1384 nb_components = get_bits(&s->gb, 8);
1385 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1386 av_log(s->avctx, AV_LOG_ERROR,
1387 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1388 return AVERROR_PATCHWELCOME;
1389 }
1390 if (len != 6 + 2 * nb_components) {
1391 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1392 return AVERROR_INVALIDDATA;
1393 }
1394 for (i = 0; i < nb_components; i++) {
1395 id = get_bits(&s->gb, 8) - 1;
1396 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1397 /* find component index */
1398 for (index = 0; index < s->nb_components; index++)
1399 if (id == s->component_id[index])
1400 break;
1401 if (index == s->nb_components) {
1402 av_log(s->avctx, AV_LOG_ERROR,
1403 "decode_sos: index(%d) out of components\n", index);
1404 return AVERROR_INVALIDDATA;
1405 }
1406 /* Metasoft MJPEG codec has Cb and Cr swapped */
1407 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1408 && nb_components == 3 && s->nb_components == 3 && i)
1409 index = 3 - i;
1410
1411 s->quant_sindex[i] = s->quant_index[index];
1412 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1413 s->h_scount[i] = s->h_count[index];
1414 s->v_scount[i] = s->v_count[index];
1415
1416 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1417 index = (i+2)%3;
1418 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1419 index = (index+2)%3;
1420
1421 s->comp_index[i] = index;
1422
1423 s->dc_index[i] = get_bits(&s->gb, 4);
1424 s->ac_index[i] = get_bits(&s->gb, 4);
1425
1426 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1427 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1428 goto out_of_range;
1429 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))
1430 goto out_of_range;
1431 }
1432
1433 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1434 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1435 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1436 prev_shift = get_bits(&s->gb, 4); /* Ah */
1437 point_transform = get_bits(&s->gb, 4); /* Al */
1438 }else
1439 prev_shift = point_transform = 0;
1440
1441 if (nb_components > 1) {
1442 /* interleaved stream */
1443 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1444 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1445 } else if (!s->ls) { /* skip this for JPEG-LS */
1446 h = s->h_max / s->h_scount[0];
1447 v = s->v_max / s->v_scount[0];
1448 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1449 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1450 s->nb_blocks[0] = 1;
1451 s->h_scount[0] = 1;
1452 s->v_scount[0] = 1;
1453 }
1454
1455 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1456 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1457 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1458 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1459 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1460
1461
1462 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1463 for (i = s->mjpb_skiptosod; i > 0; i--)
1464 skip_bits(&s->gb, 8);
1465
1466next_field:
1467 for (i = 0; i < nb_components; i++)
1468 s->last_dc[i] = (4 << s->bits);
1469
1470 if (s->lossless) {
1471 av_assert0(s->picture_ptr == s->picture);
1472 if (CONFIG_JPEGLS_DECODER && s->ls) {
1473// for () {
1474// reset_ls_coding_parameters(s, 0);
1475
1476 if ((ret = ff_jpegls_decode_picture(s, predictor,
1477 point_transform, ilv)) < 0)
1478 return ret;
1479 } else {
1480 if (s->rgb) {
1481 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1482 return ret;
1483 } else {
1484 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1485 point_transform,
1486 nb_components)) < 0)
1487 return ret;
1488 }
1489 }
1490 } else {
1491 if (s->progressive && predictor) {
1492 av_assert0(s->picture_ptr == s->picture);
1493 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1494 ilv, prev_shift,
1495 point_transform)) < 0)
1496 return ret;
1497 } else {
1498 if ((ret = mjpeg_decode_scan(s, nb_components,
1499 prev_shift, point_transform,
1500 mb_bitmask, mb_bitmask_size, reference)) < 0)
1501 return ret;
1502 }
1503 }
1504
1505 if (s->interlaced &&
1506 get_bits_left(&s->gb) > 32 &&
1507 show_bits(&s->gb, 8) == 0xFF) {
1508 GetBitContext bak = s->gb;
1509 align_get_bits(&bak);
1510 if (show_bits(&bak, 16) == 0xFFD1) {
1511 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1512 s->gb = bak;
1513 skip_bits(&s->gb, 16);
1514 s->bottom_field ^= 1;
1515
1516 goto next_field;
1517 }
1518 }
1519
1520 emms_c();
1521 return 0;
1522 out_of_range:
1523 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1524 return AVERROR_INVALIDDATA;
1525}
1526
1527static int mjpeg_decode_dri(MJpegDecodeContext *s)
1528{
1529 if (get_bits(&s->gb, 16) != 4)
1530 return AVERROR_INVALIDDATA;
1531 s->restart_interval = get_bits(&s->gb, 16);
1532 s->restart_count = 0;
1533 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1534 s->restart_interval);
1535
1536 return 0;
1537}
1538
1539static int mjpeg_decode_app(MJpegDecodeContext *s)
1540{
1541 int len, id, i;
1542
1543 len = get_bits(&s->gb, 16);
1544 if (len < 6)
1545 return AVERROR_INVALIDDATA;
1546 if (8 * len > get_bits_left(&s->gb))
1547 return AVERROR_INVALIDDATA;
1548
1549 id = get_bits_long(&s->gb, 32);
1550 len -= 6;
1551
1552 if (s->avctx->debug & FF_DEBUG_STARTCODE) {
1553 char id_str[32];
1554 av_get_codec_tag_string(id_str, sizeof(id_str), av_bswap32(id));
1555 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n", id_str, id, len);
1556 }
1557
1558 /* Buggy AVID, it puts EOI only at every 10th frame. */
1559 /* Also, this fourcc is used by non-avid files too, it holds some
1560 information, but it's always present in AVID-created files. */
1561 if (id == AV_RB32("AVI1")) {
1562 /* structure:
1563 4bytes AVI1
1564 1bytes polarity
1565 1bytes always zero
1566 4bytes field_size
1567 4bytes field_size_less_padding
1568 */
1569 s->buggy_avid = 1;
1570 i = get_bits(&s->gb, 8); len--;
1571 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1572#if 0
1573 skip_bits(&s->gb, 8);
1574 skip_bits(&s->gb, 32);
1575 skip_bits(&s->gb, 32);
1576 len -= 10;
1577#endif
1578 goto out;
1579 }
1580
1581// len -= 2;
1582
1583 if (id == AV_RB32("JFIF")) {
1584 int t_w, t_h, v1, v2;
1585 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1586 v1 = get_bits(&s->gb, 8);
1587 v2 = get_bits(&s->gb, 8);
1588 skip_bits(&s->gb, 8);
1589
1590 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1591 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1592 ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
1593
1594 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1595 av_log(s->avctx, AV_LOG_INFO,
1596 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1597 v1, v2,
1598 s->avctx->sample_aspect_ratio.num,
1599 s->avctx->sample_aspect_ratio.den);
1600
1601 t_w = get_bits(&s->gb, 8);
1602 t_h = get_bits(&s->gb, 8);
1603 if (t_w && t_h) {
1604 /* skip thumbnail */
1605 if (len -10 - (t_w * t_h * 3) > 0)
1606 len -= t_w * t_h * 3;
1607 }
1608 len -= 10;
1609 goto out;
1610 }
1611
1612 if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1613 skip_bits(&s->gb, 16); /* version */
1614 skip_bits(&s->gb, 16); /* flags0 */
1615 skip_bits(&s->gb, 16); /* flags1 */
1616 s->adobe_transform = get_bits(&s->gb, 8);
1617 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1618 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1619 len -= 7;
1620 goto out;
1621 }
1622
1623 if (id == AV_RB32("LJIF")) {
1624 int rgb = s->rgb;
1625 int pegasus_rct = s->pegasus_rct;
1626 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1627 av_log(s->avctx, AV_LOG_INFO,
1628 "Pegasus lossless jpeg header found\n");
1629 skip_bits(&s->gb, 16); /* version ? */
1630 skip_bits(&s->gb, 16); /* unknown always 0? */
1631 skip_bits(&s->gb, 16); /* unknown always 0? */
1632 skip_bits(&s->gb, 16); /* unknown always 0? */
1633 switch (i=get_bits(&s->gb, 8)) {
1634 case 1:
1635 rgb = 1;
1636 pegasus_rct = 0;
1637 break;
1638 case 2:
1639 rgb = 1;
1640 pegasus_rct = 1;
1641 break;
1642 default:
1643 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1644 }
1645
1646 len -= 9;
1647 if (s->got_picture)
1648 if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
1649 av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
1650 goto out;
1651 }
1652
1653 s->rgb = rgb;
1654 s->pegasus_rct = pegasus_rct;
1655
1656 goto out;
1657 }
1658 if (id == AV_RL32("colr") && len > 0) {
1659 s->colr = get_bits(&s->gb, 8);
1660 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1661 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1662 len --;
1663 goto out;
1664 }
1665 if (id == AV_RL32("xfrm") && len > 0) {
1666 s->xfrm = get_bits(&s->gb, 8);
1667 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1668 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1669 len --;
1670 goto out;
1671 }
1672
1673 /* JPS extension by VRex */
1674 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1675 int flags, layout, type;
1676 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1677 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1678
1679 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1680 skip_bits(&s->gb, 16); len -= 2; /* block length */
1681 skip_bits(&s->gb, 8); /* reserved */
1682 flags = get_bits(&s->gb, 8);
1683 layout = get_bits(&s->gb, 8);
1684 type = get_bits(&s->gb, 8);
1685 len -= 4;
1686
1687 s->stereo3d = av_stereo3d_alloc();
1688 if (!s->stereo3d) {
1689 goto out;
1690 }
1691 if (type == 0) {
1692 s->stereo3d->type = AV_STEREO3D_2D;
1693 } else if (type == 1) {
1694 switch (layout) {
1695 case 0x01:
1696 s->stereo3d->type = AV_STEREO3D_LINES;
1697 break;
1698 case 0x02:
1699 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1700 break;
1701 case 0x03:
1702 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1703 break;
1704 }
1705 if (!(flags & 0x04)) {
1706 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1707 }
1708 }
1709 goto out;
1710 }
1711
1712 /* EXIF metadata */
1713 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1714 GetByteContext gbytes;
1715 int ret, le, ifd_offset, bytes_read;
1716 const uint8_t *aligned;
1717
1718 skip_bits(&s->gb, 16); // skip padding
1719 len -= 2;
1720
1721 // init byte wise reading
1722 aligned = align_get_bits(&s->gb);
1723 bytestream2_init(&gbytes, aligned, len);
1724
1725 // read TIFF header
1726 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1727 if (ret) {
1728 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1729 } else {
1730 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1731
1732 // read 0th IFD and store the metadata
1733 // (return values > 0 indicate the presence of subimage metadata)
1734 ret = avpriv_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1735 if (ret < 0) {
1736 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1737 }
1738 }
1739
1740 bytes_read = bytestream2_tell(&gbytes);
1741 skip_bits(&s->gb, bytes_read << 3);
1742 len -= bytes_read;
1743
1744 goto out;
1745 }
1746
1747 /* Apple MJPEG-A */
1748 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1749 id = get_bits_long(&s->gb, 32);
1750 len -= 4;
1751 /* Apple MJPEG-A */
1752 if (id == AV_RB32("mjpg")) {
1753#if 0
1754 skip_bits(&s->gb, 32); /* field size */
1755 skip_bits(&s->gb, 32); /* pad field size */
1756 skip_bits(&s->gb, 32); /* next off */
1757 skip_bits(&s->gb, 32); /* quant off */
1758 skip_bits(&s->gb, 32); /* huff off */
1759 skip_bits(&s->gb, 32); /* image off */
1760 skip_bits(&s->gb, 32); /* scan off */
1761 skip_bits(&s->gb, 32); /* data off */
1762#endif
1763 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1764 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1765 }
1766 }
1767
1768out:
1769 /* slow but needed for extreme adobe jpegs */
1770 if (len < 0)
1771 av_log(s->avctx, AV_LOG_ERROR,
1772 "mjpeg: error, decode_app parser read over the end\n");
1773 while (--len > 0)
1774 skip_bits(&s->gb, 8);
1775
1776 return 0;
1777}
1778
1779static int mjpeg_decode_com(MJpegDecodeContext *s)
1780{
1781 int len = get_bits(&s->gb, 16);
1782 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1783 char *cbuf = av_malloc(len - 1);
1784 if (cbuf) {
1785 int i;
1786 for (i = 0; i < len - 2; i++)
1787 cbuf[i] = get_bits(&s->gb, 8);
1788 if (i > 0 && cbuf[i - 1] == '\n')
1789 cbuf[i - 1] = 0;
1790 else
1791 cbuf[i] = 0;
1792
1793 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1794 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1795
1796 /* buggy avid, it puts EOI only at every 10th frame */
1797 if (!strncmp(cbuf, "AVID", 4)) {
1798 parse_avid(s, cbuf, len);
1799 } else if (!strcmp(cbuf, "CS=ITU601"))
1800 s->cs_itu601 = 1;
1801 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
1802 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1803 s->flipped = 1;
1804
1805 av_free(cbuf);
1806 }
1807 }
1808
1809 return 0;
1810}
1811
1812/* return the 8 bit start code value and update the search
1813 state. Return -1 if no start code found */
1814static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1815{
1816 const uint8_t *buf_ptr;
1817 unsigned int v, v2;
1818 int val;
1819 int skipped = 0;
1820
1821 buf_ptr = *pbuf_ptr;
1822 while (buf_end - buf_ptr > 1) {
1823 v = *buf_ptr++;
1824 v2 = *buf_ptr;
1825 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1826 val = *buf_ptr++;
1827 goto found;
1828 }
1829 skipped++;
1830 }
1831 buf_ptr = buf_end;
1832 val = -1;
1833found:
1834 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1835 *pbuf_ptr = buf_ptr;
1836 return val;
1837}
1838
1839int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1840 const uint8_t **buf_ptr, const uint8_t *buf_end,
1841 const uint8_t **unescaped_buf_ptr,
1842 int *unescaped_buf_size)
1843{
1844 int start_code;
1845 start_code = find_marker(buf_ptr, buf_end);
1846
1847 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1848 if (!s->buffer)
1849 return AVERROR(ENOMEM);
1850
1851 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1852 if (start_code == SOS && !s->ls) {
1853 const uint8_t *src = *buf_ptr;
1854 uint8_t *dst = s->buffer;
1855
1856 while (src < buf_end) {
1857 uint8_t x = *(src++);
1858
1859 *(dst++) = x;
1860 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1861 if (x == 0xff) {
1862 while (src < buf_end && x == 0xff)
1863 x = *(src++);
1864
1865 if (x >= 0xd0 && x <= 0xd7)
1866 *(dst++) = x;
1867 else if (x)
1868 break;
1869 }
1870 }
1871 }
1872 *unescaped_buf_ptr = s->buffer;
1873 *unescaped_buf_size = dst - s->buffer;
1874 memset(s->buffer + *unescaped_buf_size, 0,
1875 FF_INPUT_BUFFER_PADDING_SIZE);
1876
1877 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
1878 (buf_end - *buf_ptr) - (dst - s->buffer));
1879 } else if (start_code == SOS && s->ls) {
1880 const uint8_t *src = *buf_ptr;
1881 uint8_t *dst = s->buffer;
1882 int bit_count = 0;
1883 int t = 0, b = 0;
1884 PutBitContext pb;
1885
1886 /* find marker */
1887 while (src + t < buf_end) {
1888 uint8_t x = src[t++];
1889 if (x == 0xff) {
1890 while ((src + t < buf_end) && x == 0xff)
1891 x = src[t++];
1892 if (x & 0x80) {
1893 t -= FFMIN(2, t);
1894 break;
1895 }
1896 }
1897 }
1898 bit_count = t * 8;
1899 init_put_bits(&pb, dst, t);
1900
1901 /* unescape bitstream */
1902 while (b < t) {
1903 uint8_t x = src[b++];
1904 put_bits(&pb, 8, x);
1905 if (x == 0xFF) {
1906 x = src[b++];
1907 put_bits(&pb, 7, x);
1908 bit_count--;
1909 }
1910 }
1911 flush_put_bits(&pb);
1912
1913 *unescaped_buf_ptr = dst;
1914 *unescaped_buf_size = (bit_count + 7) >> 3;
1915 memset(s->buffer + *unescaped_buf_size, 0,
1916 FF_INPUT_BUFFER_PADDING_SIZE);
1917 } else {
1918 *unescaped_buf_ptr = *buf_ptr;
1919 *unescaped_buf_size = buf_end - *buf_ptr;
1920 }
1921
1922 return start_code;
1923}
1924
1925int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1926 AVPacket *avpkt)
1927{
1928 AVFrame *frame = data;
1929 const uint8_t *buf = avpkt->data;
1930 int buf_size = avpkt->size;
1931 MJpegDecodeContext *s = avctx->priv_data;
1932 const uint8_t *buf_end, *buf_ptr;
1933 const uint8_t *unescaped_buf_ptr;
1934 int hshift, vshift;
1935 int unescaped_buf_size;
1936 int start_code;
1937 int i, index;
1938 int ret = 0;
1939 int is16bit;
1940
1941 av_dict_free(&s->exif_metadata);
1942 av_freep(&s->stereo3d);
1943 s->adobe_transform = -1;
1944
1945 buf_ptr = buf;
1946 buf_end = buf + buf_size;
1947 while (buf_ptr < buf_end) {
1948 /* find start next marker */
1949 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1950 &unescaped_buf_ptr,
1951 &unescaped_buf_size);
1952 /* EOF */
1953 if (start_code < 0) {
1954 break;
1955 } else if (unescaped_buf_size > INT_MAX / 8) {
1956 av_log(avctx, AV_LOG_ERROR,
1957 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1958 start_code, unescaped_buf_size, buf_size);
1959 return AVERROR_INVALIDDATA;
1960 }
1961 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
1962 start_code, buf_end - buf_ptr);
1963
1964 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
1965
1966 if (ret < 0) {
1967 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
1968 goto fail;
1969 }
1970
1971 s->start_code = start_code;
1972 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1973 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1974
1975 /* process markers */
1976 if (start_code >= 0xd0 && start_code <= 0xd7)
1977 av_log(avctx, AV_LOG_DEBUG,
1978 "restart marker: %d\n", start_code & 0x0f);
1979 /* APP fields */
1980 else if (start_code >= APP0 && start_code <= APP15)
1981 mjpeg_decode_app(s);
1982 /* Comment */
1983 else if (start_code == COM)
1984 mjpeg_decode_com(s);
1985
1986 ret = -1;
1987
1988 if (!CONFIG_JPEGLS_DECODER &&
1989 (start_code == SOF48 || start_code == LSE)) {
1990 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
1991 return AVERROR(ENOSYS);
1992 }
1993
1994 switch (start_code) {
1995 case SOI:
1996 s->restart_interval = 0;
1997 s->restart_count = 0;
1998 /* nothing to do on SOI */
1999 break;
2000 case DQT:
2001 ff_mjpeg_decode_dqt(s);
2002 break;
2003 case DHT:
2004 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
2005 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
2006 goto fail;
2007 }
2008 break;
2009 case SOF0:
2010 case SOF1:
2011 s->lossless = 0;
2012 s->ls = 0;
2013 s->progressive = 0;
2014 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2015 goto fail;
2016 break;
2017 case SOF2:
2018 s->lossless = 0;
2019 s->ls = 0;
2020 s->progressive = 1;
2021 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2022 goto fail;
2023 break;
2024 case SOF3:
2025 s->lossless = 1;
2026 s->ls = 0;
2027 s->progressive = 0;
2028 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2029 goto fail;
2030 break;
2031 case SOF48:
2032 s->lossless = 1;
2033 s->ls = 1;
2034 s->progressive = 0;
2035 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2036 goto fail;
2037 break;
2038 case LSE:
2039 if (!CONFIG_JPEGLS_DECODER ||
2040 (ret = ff_jpegls_decode_lse(s)) < 0)
2041 goto fail;
2042 break;
2043 case EOI:
2044eoi_parser:
2045 s->cur_scan = 0;
2046 if (!s->got_picture) {
2047 av_log(avctx, AV_LOG_WARNING,
2048 "Found EOI before any SOF, ignoring\n");
2049 break;
2050 }
2051 if (s->interlaced) {
2052 s->bottom_field ^= 1;
2053 /* if not bottom field, do not output image yet */
2054 if (s->bottom_field == !s->interlace_polarity)
2055 break;
2056 }
2057 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2058 return ret;
2059 *got_frame = 1;
2060 s->got_picture = 0;
2061
2062 if (!s->lossless) {
2063 int qp = FFMAX3(s->qscale[0],
2064 s->qscale[1],
2065 s->qscale[2]);
2066 int qpw = (s->width + 15) / 16;
2067 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2068 if (qp_table_buf) {
2069 memset(qp_table_buf->data, qp, qpw);
2070 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2071 }
2072
2073 if(avctx->debug & FF_DEBUG_QP)
2074 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2075 }
2076
2077 goto the_end;
2078 case SOS:
2079 s->cur_scan++;
2080 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2081 (avctx->err_recognition & AV_EF_EXPLODE))
2082 goto fail;
2083 break;
2084 case DRI:
2085 mjpeg_decode_dri(s);
2086 break;
2087 case SOF5:
2088 case SOF6:
2089 case SOF7:
2090 case SOF9:
2091 case SOF10:
2092 case SOF11:
2093 case SOF13:
2094 case SOF14:
2095 case SOF15:
2096 case JPG:
2097 av_log(avctx, AV_LOG_ERROR,
2098 "mjpeg: unsupported coding type (%x)\n", start_code);
2099 break;
2100 }
2101
2102 /* eof process start code */
2103 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2104 av_log(avctx, AV_LOG_DEBUG,
2105 "marker parser used %d bytes (%d bits)\n",
2106 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2107 }
2108 if (s->got_picture && s->cur_scan) {
2109 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2110 goto eoi_parser;
2111 }
2112 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2113 return AVERROR_INVALIDDATA;
2114fail:
2115 s->got_picture = 0;
2116 return ret;
2117the_end:
2118
2119 is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step_minus1;
2120
2121 if (s->upscale_h) {
2122 int p;
2123 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2124 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2125 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2126 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2127 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2128 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2129 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2130 avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2131 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2132 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2133 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2134 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2135 );
2136 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2137 for (p = 0; p<4; p++) {
2138 uint8_t *line = s->picture_ptr->data[p];
2139 int w = s->width;
2140 int h = s->height;
2141 if (!(s->upscale_h & (1<<p)))
2142 continue;
2143 if (p==1 || p==2) {
2144 w = FF_CEIL_RSHIFT(w, hshift);
2145 h = FF_CEIL_RSHIFT(h, vshift);
2146 }
2147 if (s->upscale_v & (1<<p))
2148 h = (h+1)>>1;
2149 av_assert0(w > 0);
2150 for (i = 0; i < h; i++) {
2151 if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2152 else line[w - 1] = line[(w - 1) / 2];
2153 for (index = w - 2; index > 0; index--) {
2154 if (is16bit)
2155 ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2156 else
2157 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2158 }
2159 line += s->linesize[p];
2160 }
2161 }
2162 }
2163 if (s->upscale_v) {
2164 int p;
2165 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2166 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2167 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2168 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2169 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2170 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2171 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2172 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2173 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2174 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2175 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2176 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2177 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2178 );
2179 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2180 for (p = 0; p < 4; p++) {
2181 uint8_t *dst;
2182 int w = s->width;
2183 int h = s->height;
2184 if (!(s->upscale_v & (1<<p)))
2185 continue;
2186 if (p==1 || p==2) {
2187 w = FF_CEIL_RSHIFT(w, hshift);
2188 h = FF_CEIL_RSHIFT(h, vshift);
2189 }
2190 dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2191 for (i = h - 1; i; i--) {
2192 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2193 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2194 if (src1 == src2 || i == h - 1) {
2195 memcpy(dst, src1, w);
2196 } else {
2197 for (index = 0; index < w; index++)
2198 dst[index] = (src1[index] + src2[index]) >> 1;
2199 }
2200 dst -= s->linesize[p];
2201 }
2202 }
2203 }
2204 if (s->flipped) {
2205 int j;
2206 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2207 for (index=0; index<4; index++) {
2208 uint8_t *dst = s->picture_ptr->data[index];
2209 int w = s->picture_ptr->width;
2210 int h = s->picture_ptr->height;
2211 if(index && index<3){
2212 w = FF_CEIL_RSHIFT(w, hshift);
2213 h = FF_CEIL_RSHIFT(h, vshift);
2214 }
2215 if(dst){
2216 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2217 for (i=0; i<h/2; i++) {
2218 for (j=0; j<w; j++)
2219 FFSWAP(int, dst[j], dst2[j]);
2220 dst += s->picture_ptr->linesize[index];
2221 dst2 -= s->picture_ptr->linesize[index];
2222 }
2223 }
2224 }
2225 }
2226 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2227 int w = s->picture_ptr->width;
2228 int h = s->picture_ptr->height;
2229 for (i=0; i<h; i++) {
2230 int j;
2231 uint8_t *dst[4];
2232 for (index=0; index<4; index++) {
2233 dst[index] = s->picture_ptr->data[index]
2234 + s->picture_ptr->linesize[index]*i;
2235 }
2236 for (j=0; j<w; j++) {
2237 int k = dst[3][j];
2238 int r = dst[0][j] * k;
2239 int g = dst[1][j] * k;
2240 int b = dst[2][j] * k;
2241 dst[0][j] = g*257 >> 16;
2242 dst[1][j] = b*257 >> 16;
2243 dst[2][j] = r*257 >> 16;
2244 dst[3][j] = 255;
2245 }
2246 }
2247 }
2248 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2249 int w = s->picture_ptr->width;
2250 int h = s->picture_ptr->height;
2251 for (i=0; i<h; i++) {
2252 int j;
2253 uint8_t *dst[4];
2254 for (index=0; index<4; index++) {
2255 dst[index] = s->picture_ptr->data[index]
2256 + s->picture_ptr->linesize[index]*i;
2257 }
2258 for (j=0; j<w; j++) {
2259 int k = dst[3][j];
2260 int r = (255 - dst[0][j]) * k;
2261 int g = (128 - dst[1][j]) * k;
2262 int b = (128 - dst[2][j]) * k;
2263 dst[0][j] = r*257 >> 16;
2264 dst[1][j] = (g*257 >> 16) + 128;
2265 dst[2][j] = (b*257 >> 16) + 128;
2266 dst[3][j] = 255;
2267 }
2268 }
2269 }
2270
2271 if (s->stereo3d) {
2272 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2273 if (stereo) {
2274 stereo->type = s->stereo3d->type;
2275 stereo->flags = s->stereo3d->flags;
2276 }
2277 av_freep(&s->stereo3d);
2278 }
2279
2280 av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
2281 av_dict_free(&s->exif_metadata);
2282
2283 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2284 buf_end - buf_ptr);
2285// return buf_end - buf_ptr;
2286 return buf_ptr - buf;
2287}
2288
2289av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2290{
2291 MJpegDecodeContext *s = avctx->priv_data;
2292 int i, j;
2293
2294 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2295 av_log(avctx, AV_LOG_INFO, "Single field\n");
2296 }
2297
2298 if (s->picture) {
2299 av_frame_free(&s->picture);
2300 s->picture_ptr = NULL;
2301 } else if (s->picture_ptr)
2302 av_frame_unref(s->picture_ptr);
2303
2304 av_freep(&s->buffer);
2305 av_freep(&s->stereo3d);
2306 av_freep(&s->ljpeg_buffer);
2307 s->ljpeg_buffer_size = 0;
2308
2309 for (i = 0; i < 3; i++) {
2310 for (j = 0; j < 4; j++)
2311 ff_free_vlc(&s->vlcs[i][j]);
2312 }
2313 for (i = 0; i < MAX_COMPONENTS; i++) {
2314 av_freep(&s->blocks[i]);
2315 av_freep(&s->last_nnz[i]);
2316 }
2317 av_dict_free(&s->exif_metadata);
2318 return 0;
2319}
2320
2321static void decode_flush(AVCodecContext *avctx)
2322{
2323 MJpegDecodeContext *s = avctx->priv_data;
2324 s->got_picture = 0;
2325}
2326
2327#if CONFIG_MJPEG_DECODER
2328#define OFFSET(x) offsetof(MJpegDecodeContext, x)
2329#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2330static const AVOption options[] = {
2331 { "extern_huff", "Use external huffman table.",
2332 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
2333 { NULL },
2334};
2335
2336static const AVClass mjpegdec_class = {
2337 .class_name = "MJPEG decoder",
2338 .item_name = av_default_item_name,
2339 .option = options,
2340 .version = LIBAVUTIL_VERSION_INT,
2341};
2342
2343AVCodec ff_mjpeg_decoder = {
2344 .name = "mjpeg",
2345 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2346 .type = AVMEDIA_TYPE_VIDEO,
2347 .id = AV_CODEC_ID_MJPEG,
2348 .priv_data_size = sizeof(MJpegDecodeContext),
2349 .init = ff_mjpeg_decode_init,
2350 .close = ff_mjpeg_decode_end,
2351 .decode = ff_mjpeg_decode_frame,
2352 .flush = decode_flush,
2353 .capabilities = CODEC_CAP_DR1,
2354 .max_lowres = 3,
2355 .priv_class = &mjpegdec_class,
2356};
2357#endif
2358#if CONFIG_THP_DECODER
2359AVCodec ff_thp_decoder = {
2360 .name = "thp",
2361 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2362 .type = AVMEDIA_TYPE_VIDEO,
2363 .id = AV_CODEC_ID_THP,
2364 .priv_data_size = sizeof(MJpegDecodeContext),
2365 .init = ff_mjpeg_decode_init,
2366 .close = ff_mjpeg_decode_end,
2367 .decode = ff_mjpeg_decode_frame,
2368 .flush = decode_flush,
2369 .capabilities = CODEC_CAP_DR1,
2370 .max_lowres = 3,
2371};
2372#endif
ffmpeg Piment Noir Debian package repository