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Imported Debian version 2.5.0~trusty1.1
[deb_ffmpeg.git] / ffmpeg / libavformat / img2dec.c
CommitLineData
2ba45a60
DM		 1/*
2 * Image format
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4 * Copyright (c) 2004 Michael Niedermayer
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23#define _BSD_SOURCE
24#include <sys/stat.h>
25#include "libavutil/avstring.h"
26#include "libavutil/log.h"
27#include "libavutil/opt.h"
28#include "libavutil/pixdesc.h"
29#include "libavutil/parseutils.h"
30#include "libavutil/intreadwrite.h"
31#include "avformat.h"
32#include "avio_internal.h"
33#include "internal.h"
34#include "img2.h"
35
36#if HAVE_GLOB
37/* Locally define as 0 (bitwise-OR no-op) any missing glob options that
38 are non-posix glibc/bsd extensions. */
39#ifndef GLOB_NOMAGIC
40#define GLOB_NOMAGIC 0
41#endif
42#ifndef GLOB_BRACE
43#define GLOB_BRACE 0
44#endif
45
46#endif /* HAVE_GLOB */
47
48static const int sizes[][2] = {
49 { 640, 480 },
50 { 720, 480 },
51 { 720, 576 },
52 { 352, 288 },
53 { 352, 240 },
54 { 160, 128 },
55 { 512, 384 },
56 { 640, 352 },
57 { 640, 240 },
58};
59
60static int infer_size(int *width_ptr, int *height_ptr, int size)
61{
62 int i;
63
64 for (i = 0; i < FF_ARRAY_ELEMS(sizes); i++) {
65 if ((sizes[i][0] * sizes[i][1]) == size) {
66 *width_ptr = sizes[i][0];
67 *height_ptr = sizes[i][1];
68 return 0;
69 }
70 }
71
72 return -1;
73}
74
75static int is_glob(const char *path)
76{
77#if HAVE_GLOB
78 size_t span = 0;
79 const char *p = path;
80
81 while (p = strchr(p, '%')) {
82 if (*(++p) == '%') {
83 ++p;
84 continue;
85 }
86 if (span = strspn(p, "*?[]{}"))
87 break;
88 }
89 /* Did we hit a glob char or get to the end? */
90 return span != 0;
91#else
92 return 0;
93#endif
94}
95
96/**
97 * Get index range of image files matched by path.
98 *
99 * @param pfirst_index pointer to index updated with the first number in the range
100 * @param plast_index pointer to index updated with the last number in the range
101 * @param path path which has to be matched by the image files in the range
102 * @param start_index minimum accepted value for the first index in the range
103 * @return -1 if no image file could be found
104 */
105static int find_image_range(int *pfirst_index, int *plast_index,
106 const char *path, int start_index, int start_index_range)
107{
108 char buf[1024];
109 int range, last_index, range1, first_index;
110
111 /* find the first image */
112 for (first_index = start_index; first_index < start_index + start_index_range; first_index++) {
113 if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0) {
114 *pfirst_index =
115 *plast_index = 1;
116 if (avio_check(buf, AVIO_FLAG_READ) > 0)
117 return 0;
118 return -1;
119 }
120 if (avio_check(buf, AVIO_FLAG_READ) > 0)
121 break;
122 }
123 if (first_index == start_index + start_index_range)
124 goto fail;
125
126 /* find the last image */
127 last_index = first_index;
128 for (;;) {
129 range = 0;
130 for (;;) {
131 if (!range)
132 range1 = 1;
133 else
134 range1 = 2 * range;
135 if (av_get_frame_filename(buf, sizeof(buf), path,
136 last_index + range1) < 0)
137 goto fail;
138 if (avio_check(buf, AVIO_FLAG_READ) <= 0)
139 break;
140 range = range1;
141 /* just in case... */
142 if (range >= (1 << 30))
143 goto fail;
144 }
145 /* we are sure than image last_index + range exists */
146 if (!range)
147 break;
148 last_index += range;
149 }
150 *pfirst_index = first_index;
151 *plast_index = last_index;
152 return 0;
153
154fail:
155 return -1;
156}
157
158static int img_read_probe(AVProbeData *p)
159{
160 if (p->filename && ff_guess_image2_codec(p->filename)) {
161 if (av_filename_number_test(p->filename))
162 return AVPROBE_SCORE_MAX;
163 else if (is_glob(p->filename))
164 return AVPROBE_SCORE_MAX;
165 else if (p->filename[strcspn(p->filename, "*?{")]) // probably PT_GLOB
166 return AVPROBE_SCORE_EXTENSION + 2; // score chosen to be a tad above the image pipes
167 else if (p->buf_size == 0)
168 return 0;
169 else if (av_match_ext(p->filename, "raw") || av_match_ext(p->filename, "gif"))
170 return 5;
171 else
172 return AVPROBE_SCORE_EXTENSION;
173 }
174 return 0;
175}
176
177int ff_img_read_header(AVFormatContext *s1)
178{
179 VideoDemuxData *s = s1->priv_data;
180 int first_index, last_index;
181 AVStream *st;
182 enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE;
183
184 s1->ctx_flags |= AVFMTCTX_NOHEADER;
185
186 st = avformat_new_stream(s1, NULL);
187 if (!st) {
188 return AVERROR(ENOMEM);
189 }
190
191 if (s->pixel_format &&
192 (pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
193 av_log(s1, AV_LOG_ERROR, "No such pixel format: %s.\n",
194 s->pixel_format);
195 return AVERROR(EINVAL);
196 }
197
198 av_strlcpy(s->path, s1->filename, sizeof(s->path));
199 s->img_number = 0;
200 s->img_count = 0;
201
202 /* find format */
203 if (s1->iformat->flags & AVFMT_NOFILE)
204 s->is_pipe = 0;
205 else {
206 s->is_pipe = 1;
207 st->need_parsing = AVSTREAM_PARSE_FULL;
208 }
209
210 if (s->ts_from_file == 2) {
211#if !HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
212 av_log(s1, AV_LOG_ERROR, "POSIX.1-2008 not supported, nanosecond file timestamps unavailable\n");
213 return AVERROR(ENOSYS);
214#endif
215 avpriv_set_pts_info(st, 64, 1, 1000000000);
216 } else if (s->ts_from_file)
217 avpriv_set_pts_info(st, 64, 1, 1);
218 else
219 avpriv_set_pts_info(st, 64, s->framerate.den, s->framerate.num);
220
221 if (s->width && s->height) {
222 st->codec->width = s->width;
223 st->codec->height = s->height;
224 }
225
226 if (!s->is_pipe) {
227 if (s->pattern_type == PT_GLOB_SEQUENCE) {
228 s->use_glob = is_glob(s->path);
229 if (s->use_glob) {
230 char *p = s->path, *q, *dup;
231 int gerr;
232
233 av_log(s1, AV_LOG_WARNING, "Pattern type 'glob_sequence' is deprecated: "
234 "use pattern_type 'glob' instead\n");
235#if HAVE_GLOB
236 dup = q = av_strdup(p);
237 while (*q) {
238 /* Do we have room for the next char and a \ insertion? */
239 if ((p - s->path) >= (sizeof(s->path) - 2))
240 break;
241 if (*q == '%' && strspn(q + 1, "%*?[]{}"))
242 ++q;
243 else if (strspn(q, "\\*?[]{}"))
244 *p++ = '\\';
245 *p++ = *q++;
246 }
247 *p = 0;
248 av_free(dup);
249
250 gerr = glob(s->path, GLOB_NOCHECK|GLOB_BRACE|GLOB_NOMAGIC, NULL, &s->globstate);
251 if (gerr != 0) {
252 return AVERROR(ENOENT);
253 }
254 first_index = 0;
255 last_index = s->globstate.gl_pathc - 1;
256#endif
257 }
258 }
259 if ((s->pattern_type == PT_GLOB_SEQUENCE && !s->use_glob) || s->pattern_type == PT_SEQUENCE) {
260 if (find_image_range(&first_index, &last_index, s->path,
261 s->start_number, s->start_number_range) < 0) {
262 av_log(s1, AV_LOG_ERROR,
263 "Could find no file with path '%s' and index in the range %d-%d\n",
264 s->path, s->start_number, s->start_number + s->start_number_range - 1);
265 return AVERROR(ENOENT);
266 }
267 } else if (s->pattern_type == PT_GLOB) {
268#if HAVE_GLOB
269 int gerr;
270 gerr = glob(s->path, GLOB_NOCHECK|GLOB_BRACE|GLOB_NOMAGIC, NULL, &s->globstate);
271 if (gerr != 0) {
272 return AVERROR(ENOENT);
273 }
274 first_index = 0;
275 last_index = s->globstate.gl_pathc - 1;
276 s->use_glob = 1;
277#else
278 av_log(s1, AV_LOG_ERROR,
279 "Pattern type 'glob' was selected but globbing "
280 "is not supported by this libavformat build\n");
281 return AVERROR(ENOSYS);
282#endif
283 } else if (s->pattern_type != PT_GLOB_SEQUENCE) {
284 av_log(s1, AV_LOG_ERROR,
285 "Unknown value '%d' for pattern_type option\n", s->pattern_type);
286 return AVERROR(EINVAL);
287 }
288 s->img_first = first_index;
289 s->img_last = last_index;
290 s->img_number = first_index;
291 /* compute duration */
292 if (!s->ts_from_file) {
293 st->start_time = 0;
294 st->duration = last_index - first_index + 1;
295 }
296 }
297
298 if (s1->video_codec_id) {
299 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
300 st->codec->codec_id = s1->video_codec_id;
301 } else if (s1->audio_codec_id) {
302 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
303 st->codec->codec_id = s1->audio_codec_id;
304 } else if (s1->iformat->raw_codec_id) {
305 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
306 st->codec->codec_id = s1->iformat->raw_codec_id;
307 } else {
308 const char *str = strrchr(s->path, '.');
309 s->split_planes = str && !av_strcasecmp(str + 1, "y");
310 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
311 if (s1->pb) {
312 int probe_buffer_size = 2048;
313 uint8_t *probe_buffer = av_realloc(NULL, probe_buffer_size + AVPROBE_PADDING_SIZE);
314 AVInputFormat *fmt = NULL;
315 AVProbeData pd = { 0 };
316
317 if (!probe_buffer)
318 return AVERROR(ENOMEM);
319
320 probe_buffer_size = avio_read(s1->pb, probe_buffer, probe_buffer_size);
321 if (probe_buffer_size < 0) {
322 av_free(probe_buffer);
323 return probe_buffer_size;
324 }
325 memset(probe_buffer + probe_buffer_size, 0, AVPROBE_PADDING_SIZE);
326
327 pd.buf = probe_buffer;
328 pd.buf_size = probe_buffer_size;
329 pd.filename = s1->filename;
330
331 while ((fmt = av_iformat_next(fmt))) {
332 if (fmt->read_header != ff_img_read_header ||
333 !fmt->read_probe ||
334 (fmt->flags & AVFMT_NOFILE) ||
335 !fmt->raw_codec_id)
336 continue;
337 if (fmt->read_probe(&pd) > 0) {
338 st->codec->codec_id = fmt->raw_codec_id;
339 break;
340 }
341 }
342 ffio_rewind_with_probe_data(s1->pb, &probe_buffer, probe_buffer_size);
343 }
344 if (st->codec->codec_id == AV_CODEC_ID_NONE)
345 st->codec->codec_id = ff_guess_image2_codec(s->path);
346 if (st->codec->codec_id == AV_CODEC_ID_LJPEG)
347 st->codec->codec_id = AV_CODEC_ID_MJPEG;
348 if (st->codec->codec_id == AV_CODEC_ID_ALIAS_PIX) // we cannot distingiush this from BRENDER_PIX
349 st->codec->codec_id = AV_CODEC_ID_NONE;
350 }
351 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
352 pix_fmt != AV_PIX_FMT_NONE)
353 st->codec->pix_fmt = pix_fmt;
354
355 return 0;
356}
357
358int ff_img_read_packet(AVFormatContext *s1, AVPacket *pkt)
359{
360 VideoDemuxData *s = s1->priv_data;
361 char filename_bytes[1024];
362 char *filename = filename_bytes;
f6fa7814 363 int i, res;
2ba45a60
DM		 364 int size[3] = { 0 }, ret[3] = { 0 };
365 AVIOContext *f[3] = { NULL };
366 AVCodecContext *codec = s1->streams[0]->codec;
367
368 if (!s->is_pipe) {
369 /* loop over input */
370 if (s->loop && s->img_number > s->img_last) {
371 s->img_number = s->img_first;
372 }
373 if (s->img_number > s->img_last)
374 return AVERROR_EOF;
375 if (s->use_glob) {
376#if HAVE_GLOB
377 filename = s->globstate.gl_pathv[s->img_number];
378#endif
379 } else {
380 if (av_get_frame_filename(filename_bytes, sizeof(filename_bytes),
381 s->path,
382 s->img_number) < 0 && s->img_number > 1)
383 return AVERROR(EIO);
384 }
385 for (i = 0; i < 3; i++) {
386 if (avio_open2(&f[i], filename, AVIO_FLAG_READ,
387 &s1->interrupt_callback, NULL) < 0) {
388 if (i >= 1)
389 break;
390 av_log(s1, AV_LOG_ERROR, "Could not open file : %s\n",
391 filename);
392 return AVERROR(EIO);
393 }
394 size[i] = avio_size(f[i]);
395
396 if (!s->split_planes)
397 break;
398 filename[strlen(filename) - 1] = 'U' + i;
399 }
400
401 if (codec->codec_id == AV_CODEC_ID_NONE) {
402 AVProbeData pd = { 0 };
403 AVInputFormat *ifmt;
404 uint8_t header[PROBE_BUF_MIN + AVPROBE_PADDING_SIZE];
405 int ret;
406 int score = 0;
407
408 ret = avio_read(f[0], header, PROBE_BUF_MIN);
409 if (ret < 0)
410 return ret;
411 memset(header + ret, 0, sizeof(header) - ret);
412 avio_skip(f[0], -ret);
413 pd.buf = header;
414 pd.buf_size = ret;
415 pd.filename = filename;
416
417 ifmt = av_probe_input_format3(&pd, 1, &score);
418 if (ifmt && ifmt->read_packet == ff_img_read_packet && ifmt->raw_codec_id)
419 codec->codec_id = ifmt->raw_codec_id;
420 }
421
422 if (codec->codec_id == AV_CODEC_ID_RAWVIDEO && !codec->width)
423 infer_size(&codec->width, &codec->height, size[0]);
424 } else {
425 f[0] = s1->pb;
426 if (avio_feof(f[0]) && s->loop && s->is_pipe)
427 avio_seek(f[0], 0, SEEK_SET);
428 if (avio_feof(f[0]))
429 return AVERROR_EOF;
430 if (s->frame_size > 0) {
431 size[0] = s->frame_size;
432 } else if (!s1->streams[0]->parser) {
433 size[0] = avio_size(s1->pb);
434 } else {
435 size[0] = 4096;
436 }
437 }
438
f6fa7814
DM		 439 res = av_new_packet(pkt, size[0] + size[1] + size[2]);
440 if (res < 0)
441 return res;
2ba45a60
DM		 442 pkt->stream_index = 0;
443 pkt->flags |= AV_PKT_FLAG_KEY;
444 if (s->ts_from_file) {
445 struct stat img_stat;
446 if (stat(filename, &img_stat))
447 return AVERROR(EIO);
448 pkt->pts = (int64_t)img_stat.st_mtime;
449#if HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
450 if (s->ts_from_file == 2)
451 pkt->pts = 1000000000*pkt->pts + img_stat.st_mtim.tv_nsec;
452#endif
453 av_add_index_entry(s1->streams[0], s->img_number, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
454 } else if (!s->is_pipe) {
455 pkt->pts = s->pts;
456 }
457
458 if (s->is_pipe)
459 pkt->pos = avio_tell(f[0]);
460
461 pkt->size = 0;
462 for (i = 0; i < 3; i++) {
463 if (f[i]) {
464 ret[i] = avio_read(f[i], pkt->data + pkt->size, size[i]);
465 if (s->loop && s->is_pipe && ret[i] == AVERROR_EOF) {
466 if (avio_seek(f[i], 0, SEEK_SET) >= 0) {
467 pkt->pos = 0;
468 ret[i] = avio_read(f[i], pkt->data + pkt->size, size[i]);
469 }
470 }
471 if (!s->is_pipe)
472 avio_close(f[i]);
473 if (ret[i] > 0)
474 pkt->size += ret[i];
475 }
476 }
477
478 if (ret[0] <= 0 || ret[1] < 0 || ret[2] < 0) {
479 av_free_packet(pkt);
480 if (ret[0] < 0) {
481 return ret[0];
482 } else if (ret[1] < 0) {
483 return ret[1];
484 } else if (ret[2] < 0)
485 return ret[2];
486 return AVERROR_EOF;
487 } else {
488 s->img_count++;
489 s->img_number++;
490 s->pts++;
491 return 0;
492 }
493}
494
495static int img_read_close(struct AVFormatContext* s1)
496{
497 VideoDemuxData *s = s1->priv_data;
498#if HAVE_GLOB
499 if (s->use_glob) {
500 globfree(&s->globstate);
501 }
502#endif
503 return 0;
504}
505
506static int img_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
507{
508 VideoDemuxData *s1 = s->priv_data;
509 AVStream *st = s->streams[0];
510
511 if (s1->ts_from_file) {
512 int index = av_index_search_timestamp(st, timestamp, flags);
513 if(index < 0)
514 return -1;
515 s1->img_number = st->index_entries[index].pos;
516 return 0;
517 }
518
519 if (timestamp < 0 || !s1->loop && timestamp > s1->img_last - s1->img_first)
520 return -1;
521 s1->img_number = timestamp%(s1->img_last - s1->img_first + 1) + s1->img_first;
522 s1->pts = timestamp;
523 return 0;
524}
525
526#define OFFSET(x) offsetof(VideoDemuxData, x)
527#define DEC AV_OPT_FLAG_DECODING_PARAM
528const AVOption ff_img_options[] = {
529 { "framerate", "set the video framerate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, DEC },
530 { "loop", "force loop over input file sequence", OFFSET(loop), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, DEC },
531
532 { "pattern_type", "set pattern type", OFFSET(pattern_type), AV_OPT_TYPE_INT, {.i64=PT_GLOB_SEQUENCE}, 0, INT_MAX, DEC, "pattern_type"},
533 { "glob_sequence","select glob/sequence pattern type", 0, AV_OPT_TYPE_CONST, {.i64=PT_GLOB_SEQUENCE}, INT_MIN, INT_MAX, DEC, "pattern_type" },
534 { "glob", "select glob pattern type", 0, AV_OPT_TYPE_CONST, {.i64=PT_GLOB }, INT_MIN, INT_MAX, DEC, "pattern_type" },
535 { "sequence", "select sequence pattern type", 0, AV_OPT_TYPE_CONST, {.i64=PT_SEQUENCE }, INT_MIN, INT_MAX, DEC, "pattern_type" },
536
537 { "pixel_format", "set video pixel format", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
538 { "start_number", "set first number in the sequence", OFFSET(start_number), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, DEC },
539 { "start_number_range", "set range for looking at the first sequence number", OFFSET(start_number_range), AV_OPT_TYPE_INT, {.i64 = 5}, 1, INT_MAX, DEC },
540 { "video_size", "set video size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
541 { "frame_size", "force frame size in bytes", OFFSET(frame_size), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, DEC },
542 { "ts_from_file", "set frame timestamp from file's one", OFFSET(ts_from_file), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 2, DEC, "ts_type" },
543 { "none", "none", 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 2, DEC, "ts_type" },
544 { "sec", "second precision", 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 2, DEC, "ts_type" },
545 { "ns", "nano second precision", 0, AV_OPT_TYPE_CONST, {.i64 = 2 }, 0, 2, DEC, "ts_type" },
546 { NULL },
547};
548
549#if CONFIG_IMAGE2_DEMUXER
550static const AVClass img2_class = {
551 .class_name = "image2 demuxer",
552 .item_name = av_default_item_name,
553 .option = ff_img_options,
554 .version = LIBAVUTIL_VERSION_INT,
555};
556AVInputFormat ff_image2_demuxer = {
557 .name = "image2",
558 .long_name = NULL_IF_CONFIG_SMALL("image2 sequence"),
559 .priv_data_size = sizeof(VideoDemuxData),
560 .read_probe = img_read_probe,
561 .read_header = ff_img_read_header,
562 .read_packet = ff_img_read_packet,
563 .read_close = img_read_close,
564 .read_seek = img_read_seek,
565 .flags = AVFMT_NOFILE,
566 .priv_class = &img2_class,
567};
568#endif
569#if CONFIG_IMAGE2PIPE_DEMUXER
570static const AVClass img2pipe_class = {
571 .class_name = "image2pipe demuxer",
572 .item_name = av_default_item_name,
573 .option = ff_img_options,
574 .version = LIBAVUTIL_VERSION_INT,
575};
576AVInputFormat ff_image2pipe_demuxer = {
577 .name = "image2pipe",
578 .long_name = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
579 .priv_data_size = sizeof(VideoDemuxData),
580 .read_header = ff_img_read_header,
581 .read_packet = ff_img_read_packet,
582 .priv_class = &img2pipe_class,
583};
584#endif
585
586static int bmp_probe(AVProbeData *p)
587{
588 const uint8_t *b = p->buf;
589 int ihsize;
590
591 if (AV_RB16(b) != 0x424d)
592 return 0;
593
594 ihsize = AV_RL32(b+14);
595 if (ihsize < 12 || ihsize > 255)
596 return 0;
597
598 if (!AV_RN32(b + 6)) {
f6fa7814 599 return AVPROBE_SCORE_EXTENSION + 1;
2ba45a60
DM		 600 } else {
601 return AVPROBE_SCORE_EXTENSION / 4;
602 }
603 return 0;
604}
605
606static int dpx_probe(AVProbeData *p)
607{
608 const uint8_t *b = p->buf;
609
610 if (AV_RN32(b) == AV_RN32("SDPX") || AV_RN32(b) == AV_RN32("XPDS"))
611 return AVPROBE_SCORE_EXTENSION + 1;
612 return 0;
613}
614
615static int exr_probe(AVProbeData *p)
616{
617 const uint8_t *b = p->buf;
618
619 if (AV_RL32(b) == 20000630)
620 return AVPROBE_SCORE_EXTENSION + 1;
621 return 0;
622}
623
624static int j2k_probe(AVProbeData *p)
625{
626 const uint8_t *b = p->buf;
627
628 if (AV_RB64(b) == 0x0000000c6a502020 ||
629 AV_RB32(b) == 0xff4fff51)
630 return AVPROBE_SCORE_EXTENSION + 1;
631 return 0;
632}
633
f6fa7814
DM		 634static int jpeg_probe(AVProbeData *p)
635{
636 const uint8_t *b = p->buf;
637 int i, state = 0xD8;
638
639 if (AV_RB16(b) != 0xFFD8 ||
640 AV_RB32(b) == 0xFFD8FFF7)
641 return 0;
642
643 b += 2;
644 for (i = 0; i < p->buf_size - 2; i++) {
645 int c;
646 if (b[i] != 0xFF)
647 continue;
648 c = b[i + 1];
649 switch (c) {
650 case 0xD8:
651 return 0;
652 case 0xC0:
653 case 0xC1:
654 case 0xC2:
655 case 0xC3:
656 case 0xC5:
657 case 0xC6:
658 case 0xC7:
659 if (state != 0xD8)
660 return 0;
661 state = 0xC0;
662 break;
663 case 0xDA:
664 if (state != 0xC0)
665 return 0;
666 state = 0xDA;
667 break;
668 case 0xD9:
669 if (state != 0xDA)
670 return 0;
671 state = 0xD9;
672 break;
673 default:
674 if ( (c >= 0x02 && c <= 0xBF)
675 || c == 0xC8)
676 return 0;
677 }
678 }
679
680 if (state == 0xD9)
681 return AVPROBE_SCORE_EXTENSION + 1;
682 return AVPROBE_SCORE_EXTENSION / 8;
683}
684
2ba45a60
DM		 685static int jpegls_probe(AVProbeData *p)
686{
687 const uint8_t *b = p->buf;
688
689 if (AV_RB32(b) == 0xffd8fff7)
690 return AVPROBE_SCORE_EXTENSION + 1;
691 return 0;
692}
693
694static int pictor_probe(AVProbeData *p)
695{
696 const uint8_t *b = p->buf;
697
698 if (AV_RL16(b) == 0x1234)
699 return AVPROBE_SCORE_EXTENSION / 4;
700 return 0;
701}
702
703static int png_probe(AVProbeData *p)
704{
705 const uint8_t *b = p->buf;
706
707 if (AV_RB64(b) == 0x89504e470d0a1a0a)
708 return AVPROBE_SCORE_MAX - 1;
709 return 0;
710}
711
712static int sgi_probe(AVProbeData *p)
713{
714 const uint8_t *b = p->buf;
715
716 if (AV_RB16(b) == 474 &&
717 (b[2] & ~1) == 0 &&
718 (b[3] & ~3) == 0 && b[3] &&
719 (AV_RB16(b + 4) & ~7) == 0 && AV_RB16(b + 4))
720 return AVPROBE_SCORE_EXTENSION + 1;
721 return 0;
722}
723
724static int sunrast_probe(AVProbeData *p)
725{
726 const uint8_t *b = p->buf;
727
728 if (AV_RB32(b) == 0x59a66a95)
729 return AVPROBE_SCORE_EXTENSION + 1;
730 return 0;
731}
732
733static int tiff_probe(AVProbeData *p)
734{
735 const uint8_t *b = p->buf;
736
737 if (AV_RB32(b) == 0x49492a00 ||
738 AV_RB32(b) == 0x4D4D002a)
739 return AVPROBE_SCORE_EXTENSION + 1;
740 return 0;
741}
742
743static int webp_probe(AVProbeData *p)
744{
745 const uint8_t *b = p->buf;
746
747 if (AV_RB32(b) == 0x52494646 &&
748 AV_RB32(b + 8) == 0x57454250)
749 return AVPROBE_SCORE_MAX - 1;
750 return 0;
751}
752
753#define IMAGEAUTO_DEMUXER(imgname, codecid)\
754static const AVClass imgname ## _class = {\
755 .class_name = AV_STRINGIFY(imgname) " demuxer",\
756 .item_name = av_default_item_name,\
757 .option = ff_img_options,\
758 .version = LIBAVUTIL_VERSION_INT,\
759};\
760AVInputFormat ff_image_ ## imgname ## _pipe_demuxer = {\
761 .name = AV_STRINGIFY(imgname) "_pipe",\
762 .long_name = NULL_IF_CONFIG_SMALL("piped " AV_STRINGIFY(imgname) " sequence"),\
763 .priv_data_size = sizeof(VideoDemuxData),\
764 .read_probe = imgname ## _probe,\
765 .read_header = ff_img_read_header,\
766 .read_packet = ff_img_read_packet,\
767 .priv_class = & imgname ## _class,\
768 .flags = AVFMT_GENERIC_INDEX, \
769 .raw_codec_id = codecid,\
770};
771
772IMAGEAUTO_DEMUXER(bmp, AV_CODEC_ID_BMP)
773IMAGEAUTO_DEMUXER(dpx, AV_CODEC_ID_DPX)
774IMAGEAUTO_DEMUXER(exr, AV_CODEC_ID_EXR)
775IMAGEAUTO_DEMUXER(j2k, AV_CODEC_ID_JPEG2000)
f6fa7814 776IMAGEAUTO_DEMUXER(jpeg, AV_CODEC_ID_MJPEG)
2ba45a60
DM		 777IMAGEAUTO_DEMUXER(jpegls, AV_CODEC_ID_JPEGLS)
778IMAGEAUTO_DEMUXER(pictor, AV_CODEC_ID_PICTOR)
779IMAGEAUTO_DEMUXER(png, AV_CODEC_ID_PNG)
780IMAGEAUTO_DEMUXER(sgi, AV_CODEC_ID_SGI)
781IMAGEAUTO_DEMUXER(sunrast, AV_CODEC_ID_SUNRAST)
782IMAGEAUTO_DEMUXER(tiff, AV_CODEC_ID_TIFF)
783IMAGEAUTO_DEMUXER(webp, AV_CODEC_ID_WEBP)
ffmpeg Piment Noir Debian package repository