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path: root/libavformat/img2dec.c (plain)
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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 _DEFAULT_SOURCE
24#define _BSD_SOURCE
25#include <sys/stat.h>
26#include "libavutil/avstring.h"
27#include "libavutil/log.h"
28#include "libavutil/opt.h"
29#include "libavutil/pixdesc.h"
30#include "libavutil/parseutils.h"
31#include "libavutil/intreadwrite.h"
32#include "avformat.h"
33#include "avio_internal.h"
34#include "internal.h"
35#include "img2.h"
36#include "libavcodec/mjpeg.h"
37
38#if HAVE_GLOB
39/* Locally define as 0 (bitwise-OR no-op) any missing glob options that
40 are non-posix glibc/bsd extensions. */
41#ifndef GLOB_NOMAGIC
42#define GLOB_NOMAGIC 0
43#endif
44#ifndef GLOB_BRACE
45#define GLOB_BRACE 0
46#endif
47
48#endif /* HAVE_GLOB */
49
50static const int sizes[][2] = {
51 { 640, 480 },
52 { 720, 480 },
53 { 720, 576 },
54 { 352, 288 },
55 { 352, 240 },
56 { 160, 128 },
57 { 512, 384 },
58 { 640, 352 },
59 { 640, 240 },
60};
61
62static int infer_size(int *width_ptr, int *height_ptr, int size)
63{
64 int i;
65
66 for (i = 0; i < FF_ARRAY_ELEMS(sizes); i++) {
67 if ((sizes[i][0] * sizes[i][1]) == size) {
68 *width_ptr = sizes[i][0];
69 *height_ptr = sizes[i][1];
70 return 0;
71 }
72 }
73
74 return -1;
75}
76
77static int is_glob(const char *path)
78{
79#if HAVE_GLOB
80 size_t span = 0;
81 const char *p = path;
82
83 while (p = strchr(p, '%')) {
84 if (*(++p) == '%') {
85 ++p;
86 continue;
87 }
88 if (span = strspn(p, "*?[]{}"))
89 break;
90 }
91 /* Did we hit a glob char or get to the end? */
92 return span != 0;
93#else
94 return 0;
95#endif
96}
97
98/**
99 * Get index range of image files matched by path.
100 *
101 * @param pfirst_index pointer to index updated with the first number in the range
102 * @param plast_index pointer to index updated with the last number in the range
103 * @param path path which has to be matched by the image files in the range
104 * @param start_index minimum accepted value for the first index in the range
105 * @return -1 if no image file could be found
106 */
107static int find_image_range(AVIOContext *pb, int *pfirst_index, int *plast_index,
108 const char *path, int start_index, int start_index_range)
109{
110 char buf[1024];
111 int range, last_index, range1, first_index;
112
113 /* find the first image */
114 for (first_index = start_index; first_index < start_index + start_index_range; first_index++) {
115 if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0) {
116 *pfirst_index =
117 *plast_index = 1;
118 if (pb || avio_check(buf, AVIO_FLAG_READ) > 0)
119 return 0;
120 return -1;
121 }
122 if (avio_check(buf, AVIO_FLAG_READ) > 0)
123 break;
124 }
125 if (first_index == start_index + start_index_range)
126 goto fail;
127
128 /* find the last image */
129 last_index = first_index;
130 for (;;) {
131 range = 0;
132 for (;;) {
133 if (!range)
134 range1 = 1;
135 else
136 range1 = 2 * range;
137 if (av_get_frame_filename(buf, sizeof(buf), path,
138 last_index + range1) < 0)
139 goto fail;
140 if (avio_check(buf, AVIO_FLAG_READ) <= 0)
141 break;
142 range = range1;
143 /* just in case... */
144 if (range >= (1 << 30))
145 goto fail;
146 }
147 /* we are sure than image last_index + range exists */
148 if (!range)
149 break;
150 last_index += range;
151 }
152 *pfirst_index = first_index;
153 *plast_index = last_index;
154 return 0;
155
156fail:
157 return -1;
158}
159
160static int img_read_probe(AVProbeData *p)
161{
162 if (p->filename && ff_guess_image2_codec(p->filename)) {
163 if (av_filename_number_test(p->filename))
164 return AVPROBE_SCORE_MAX;
165 else if (is_glob(p->filename))
166 return AVPROBE_SCORE_MAX;
167 else if (p->filename[strcspn(p->filename, "*?{")]) // probably PT_GLOB
168 return AVPROBE_SCORE_EXTENSION + 2; // score chosen to be a tad above the image pipes
169 else if (p->buf_size == 0)
170 return 0;
171 else if (av_match_ext(p->filename, "raw") || av_match_ext(p->filename, "gif"))
172 return 5;
173 else
174 return AVPROBE_SCORE_EXTENSION;
175 }
176 return 0;
177}
178
179int ff_img_read_header(AVFormatContext *s1)
180{
181 VideoDemuxData *s = s1->priv_data;
182 int first_index = 1, last_index = 1;
183 AVStream *st;
184 enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE;
185
186 s1->ctx_flags |= AVFMTCTX_NOHEADER;
187
188 st = avformat_new_stream(s1, NULL);
189 if (!st) {
190 return AVERROR(ENOMEM);
191 }
192
193 if (s->pixel_format &&
194 (pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
195 av_log(s1, AV_LOG_ERROR, "No such pixel format: %s.\n",
196 s->pixel_format);
197 return AVERROR(EINVAL);
198 }
199
200 av_strlcpy(s->path, s1->filename, sizeof(s->path));
201 s->img_number = 0;
202 s->img_count = 0;
203
204 /* find format */
205 if (s1->iformat->flags & AVFMT_NOFILE)
206 s->is_pipe = 0;
207 else {
208 s->is_pipe = 1;
209 st->need_parsing = AVSTREAM_PARSE_FULL;
210 }
211
212 if (s->ts_from_file == 2) {
213#if !HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
214 av_log(s1, AV_LOG_ERROR, "POSIX.1-2008 not supported, nanosecond file timestamps unavailable\n");
215 return AVERROR(ENOSYS);
216#endif
217 avpriv_set_pts_info(st, 64, 1, 1000000000);
218 } else if (s->ts_from_file)
219 avpriv_set_pts_info(st, 64, 1, 1);
220 else
221 avpriv_set_pts_info(st, 64, s->framerate.den, s->framerate.num);
222
223 if (s->width && s->height) {
224 st->codecpar->width = s->width;
225 st->codecpar->height = s->height;
226 }
227
228 if (!s->is_pipe) {
229 if (s->pattern_type == PT_DEFAULT) {
230 if (s1->pb) {
231 s->pattern_type = PT_NONE;
232 } else
233 s->pattern_type = PT_GLOB_SEQUENCE;
234 }
235
236 if (s->pattern_type == PT_GLOB_SEQUENCE) {
237 s->use_glob = is_glob(s->path);
238 if (s->use_glob) {
239#if HAVE_GLOB
240 char *p = s->path, *q, *dup;
241 int gerr;
242#endif
243
244 av_log(s1, AV_LOG_WARNING, "Pattern type 'glob_sequence' is deprecated: "
245 "use pattern_type 'glob' instead\n");
246#if HAVE_GLOB
247 dup = q = av_strdup(p);
248 while (*q) {
249 /* Do we have room for the next char and a \ insertion? */
250 if ((p - s->path) >= (sizeof(s->path) - 2))
251 break;
252 if (*q == '%' && strspn(q + 1, "%*?[]{}"))
253 ++q;
254 else if (strspn(q, "\\*?[]{}"))
255 *p++ = '\\';
256 *p++ = *q++;
257 }
258 *p = 0;
259 av_free(dup);
260
261 gerr = glob(s->path, GLOB_NOCHECK|GLOB_BRACE|GLOB_NOMAGIC, NULL, &s->globstate);
262 if (gerr != 0) {
263 return AVERROR(ENOENT);
264 }
265 first_index = 0;
266 last_index = s->globstate.gl_pathc - 1;
267#endif
268 }
269 }
270 if ((s->pattern_type == PT_GLOB_SEQUENCE && !s->use_glob) || s->pattern_type == PT_SEQUENCE) {
271 if (find_image_range(s1->pb, &first_index, &last_index, s->path,
272 s->start_number, s->start_number_range) < 0) {
273 av_log(s1, AV_LOG_ERROR,
274 "Could find no file with path '%s' and index in the range %d-%d\n",
275 s->path, s->start_number, s->start_number + s->start_number_range - 1);
276 return AVERROR(ENOENT);
277 }
278 } else if (s->pattern_type == PT_GLOB) {
279#if HAVE_GLOB
280 int gerr;
281 gerr = glob(s->path, GLOB_NOCHECK|GLOB_BRACE|GLOB_NOMAGIC, NULL, &s->globstate);
282 if (gerr != 0) {
283 return AVERROR(ENOENT);
284 }
285 first_index = 0;
286 last_index = s->globstate.gl_pathc - 1;
287 s->use_glob = 1;
288#else
289 av_log(s1, AV_LOG_ERROR,
290 "Pattern type 'glob' was selected but globbing "
291 "is not supported by this libavformat build\n");
292 return AVERROR(ENOSYS);
293#endif
294 } else if (s->pattern_type != PT_GLOB_SEQUENCE && s->pattern_type != PT_NONE) {
295 av_log(s1, AV_LOG_ERROR,
296 "Unknown value '%d' for pattern_type option\n", s->pattern_type);
297 return AVERROR(EINVAL);
298 }
299 s->img_first = first_index;
300 s->img_last = last_index;
301 s->img_number = first_index;
302 /* compute duration */
303 if (!s->ts_from_file) {
304 st->start_time = 0;
305 st->duration = last_index - first_index + 1;
306 }
307 }
308
309 if (s1->video_codec_id) {
310 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
311 st->codecpar->codec_id = s1->video_codec_id;
312 } else if (s1->audio_codec_id) {
313 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
314 st->codecpar->codec_id = s1->audio_codec_id;
315 } else if (s1->iformat->raw_codec_id) {
316 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
317 st->codecpar->codec_id = s1->iformat->raw_codec_id;
318 } else {
319 const char *str = strrchr(s->path, '.');
320 s->split_planes = str && !av_strcasecmp(str + 1, "y");
321 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
322 if (s1->pb) {
323 int probe_buffer_size = 2048;
324 uint8_t *probe_buffer = av_realloc(NULL, probe_buffer_size + AVPROBE_PADDING_SIZE);
325 AVInputFormat *fmt = NULL;
326 AVProbeData pd = { 0 };
327
328 if (!probe_buffer)
329 return AVERROR(ENOMEM);
330
331 probe_buffer_size = avio_read(s1->pb, probe_buffer, probe_buffer_size);
332 if (probe_buffer_size < 0) {
333 av_free(probe_buffer);
334 return probe_buffer_size;
335 }
336 memset(probe_buffer + probe_buffer_size, 0, AVPROBE_PADDING_SIZE);
337
338 pd.buf = probe_buffer;
339 pd.buf_size = probe_buffer_size;
340 pd.filename = s1->filename;
341
342 while ((fmt = av_iformat_next(fmt))) {
343 if (fmt->read_header != ff_img_read_header ||
344 !fmt->read_probe ||
345 (fmt->flags & AVFMT_NOFILE) ||
346 !fmt->raw_codec_id)
347 continue;
348 if (fmt->read_probe(&pd) > 0) {
349 st->codecpar->codec_id = fmt->raw_codec_id;
350 break;
351 }
352 }
353 if (s1->flags & AVFMT_FLAG_CUSTOM_IO) {
354 avio_seek(s1->pb, 0, SEEK_SET);
355 } else
356 ffio_rewind_with_probe_data(s1->pb, &probe_buffer, probe_buffer_size);
357 }
358 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
359 st->codecpar->codec_id = ff_guess_image2_codec(s->path);
360 if (st->codecpar->codec_id == AV_CODEC_ID_LJPEG)
361 st->codecpar->codec_id = AV_CODEC_ID_MJPEG;
362 if (st->codecpar->codec_id == AV_CODEC_ID_ALIAS_PIX) // we cannot distingiush this from BRENDER_PIX
363 st->codecpar->codec_id = AV_CODEC_ID_NONE;
364 }
365 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
366 pix_fmt != AV_PIX_FMT_NONE)
367 st->codecpar->format = pix_fmt;
368
369 return 0;
370}
371
372int ff_img_read_packet(AVFormatContext *s1, AVPacket *pkt)
373{
374 VideoDemuxData *s = s1->priv_data;
375 char filename_bytes[1024];
376 char *filename = filename_bytes;
377 int i, res;
378 int size[3] = { 0 }, ret[3] = { 0 };
379 AVIOContext *f[3] = { NULL };
380 AVCodecParameters *par = s1->streams[0]->codecpar;
381
382 if (!s->is_pipe) {
383 /* loop over input */
384 if (s->loop && s->img_number > s->img_last) {
385 s->img_number = s->img_first;
386 }
387 if (s->img_number > s->img_last)
388 return AVERROR_EOF;
389 if (s->pattern_type == PT_NONE) {
390 av_strlcpy(filename_bytes, s->path, sizeof(filename_bytes));
391 } else if (s->use_glob) {
392#if HAVE_GLOB
393 filename = s->globstate.gl_pathv[s->img_number];
394#endif
395 } else {
396 if (av_get_frame_filename(filename_bytes, sizeof(filename_bytes),
397 s->path,
398 s->img_number) < 0 && s->img_number > 1)
399 return AVERROR(EIO);
400 }
401 for (i = 0; i < 3; i++) {
402 if (s1->pb &&
403 !strcmp(filename_bytes, s->path) &&
404 !s->loop &&
405 !s->split_planes) {
406 f[i] = s1->pb;
407 } else if (s1->io_open(s1, &f[i], filename, AVIO_FLAG_READ, NULL) < 0) {
408 if (i >= 1)
409 break;
410 av_log(s1, AV_LOG_ERROR, "Could not open file : %s\n",
411 filename);
412 return AVERROR(EIO);
413 }
414 size[i] = avio_size(f[i]);
415
416 if (!s->split_planes)
417 break;
418 filename[strlen(filename) - 1] = 'U' + i;
419 }
420
421 if (par->codec_id == AV_CODEC_ID_NONE) {
422 AVProbeData pd = { 0 };
423 AVInputFormat *ifmt;
424 uint8_t header[PROBE_BUF_MIN + AVPROBE_PADDING_SIZE];
425 int ret;
426 int score = 0;
427
428 ret = avio_read(f[0], header, PROBE_BUF_MIN);
429 if (ret < 0)
430 return ret;
431 memset(header + ret, 0, sizeof(header) - ret);
432 avio_skip(f[0], -ret);
433 pd.buf = header;
434 pd.buf_size = ret;
435 pd.filename = filename;
436
437 ifmt = av_probe_input_format3(&pd, 1, &score);
438 if (ifmt && ifmt->read_packet == ff_img_read_packet && ifmt->raw_codec_id)
439 par->codec_id = ifmt->raw_codec_id;
440 }
441
442 if (par->codec_id == AV_CODEC_ID_RAWVIDEO && !par->width)
443 infer_size(&par->width, &par->height, size[0]);
444 } else {
445 f[0] = s1->pb;
446 if (avio_feof(f[0]) && s->loop && s->is_pipe)
447 avio_seek(f[0], 0, SEEK_SET);
448 if (avio_feof(f[0]))
449 return AVERROR_EOF;
450 if (s->frame_size > 0) {
451 size[0] = s->frame_size;
452 } else if (!s1->streams[0]->parser) {
453 size[0] = avio_size(s1->pb);
454 } else {
455 size[0] = 4096;
456 }
457 }
458
459 res = av_new_packet(pkt, size[0] + size[1] + size[2]);
460 if (res < 0) {
461 goto fail;
462 }
463 pkt->stream_index = 0;
464 pkt->flags |= AV_PKT_FLAG_KEY;
465 if (s->ts_from_file) {
466 struct stat img_stat;
467 if (stat(filename, &img_stat)) {
468 res = AVERROR(EIO);
469 goto fail;
470 }
471 pkt->pts = (int64_t)img_stat.st_mtime;
472#if HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
473 if (s->ts_from_file == 2)
474 pkt->pts = 1000000000*pkt->pts + img_stat.st_mtim.tv_nsec;
475#endif
476 av_add_index_entry(s1->streams[0], s->img_number, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
477 } else if (!s->is_pipe) {
478 pkt->pts = s->pts;
479 }
480
481 if (s->is_pipe)
482 pkt->pos = avio_tell(f[0]);
483
484 pkt->size = 0;
485 for (i = 0; i < 3; i++) {
486 if (f[i]) {
487 ret[i] = avio_read(f[i], pkt->data + pkt->size, size[i]);
488 if (s->loop && s->is_pipe && ret[i] == AVERROR_EOF) {
489 if (avio_seek(f[i], 0, SEEK_SET) >= 0) {
490 pkt->pos = 0;
491 ret[i] = avio_read(f[i], pkt->data + pkt->size, size[i]);
492 }
493 }
494 if (!s->is_pipe && f[i] != s1->pb)
495 ff_format_io_close(s1, &f[i]);
496 if (ret[i] > 0)
497 pkt->size += ret[i];
498 }
499 }
500
501 if (ret[0] <= 0 || ret[1] < 0 || ret[2] < 0) {
502 av_packet_unref(pkt);
503 if (ret[0] < 0) {
504 res = ret[0];
505 } else if (ret[1] < 0) {
506 res = ret[1];
507 } else if (ret[2] < 0) {
508 res = ret[2];
509 } else {
510 res = AVERROR_EOF;
511 }
512 goto fail;
513 } else {
514 s->img_count++;
515 s->img_number++;
516 s->pts++;
517 return 0;
518 }
519
520fail:
521 if (!s->is_pipe) {
522 for (i = 0; i < 3; i++) {
523 if (f[i] != s1->pb)
524 ff_format_io_close(s1, &f[i]);
525 }
526 }
527 return res;
528}
529
530static int img_read_close(struct AVFormatContext* s1)
531{
532#if HAVE_GLOB
533 VideoDemuxData *s = s1->priv_data;
534 if (s->use_glob) {
535 globfree(&s->globstate);
536 }
537#endif
538 return 0;
539}
540
541static int img_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
542{
543 VideoDemuxData *s1 = s->priv_data;
544 AVStream *st = s->streams[0];
545
546 if (s1->ts_from_file) {
547 int index = av_index_search_timestamp(st, timestamp, flags);
548 if(index < 0)
549 return -1;
550 s1->img_number = st->index_entries[index].pos;
551 return 0;
552 }
553
554 if (timestamp < 0 || !s1->loop && timestamp > s1->img_last - s1->img_first)
555 return -1;
556 s1->img_number = timestamp%(s1->img_last - s1->img_first + 1) + s1->img_first;
557 s1->pts = timestamp;
558 return 0;
559}
560
561#define OFFSET(x) offsetof(VideoDemuxData, x)
562#define DEC AV_OPT_FLAG_DECODING_PARAM
563const AVOption ff_img_options[] = {
564 { "framerate", "set the video framerate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, DEC },
565 { "loop", "force loop over input file sequence", OFFSET(loop), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, DEC },
566
567 { "pattern_type", "set pattern type", OFFSET(pattern_type), AV_OPT_TYPE_INT, {.i64=PT_DEFAULT}, 0, INT_MAX, DEC, "pattern_type"},
568 { "glob_sequence","select glob/sequence pattern type", 0, AV_OPT_TYPE_CONST, {.i64=PT_GLOB_SEQUENCE}, INT_MIN, INT_MAX, DEC, "pattern_type" },
569 { "glob", "select glob pattern type", 0, AV_OPT_TYPE_CONST, {.i64=PT_GLOB }, INT_MIN, INT_MAX, DEC, "pattern_type" },
570 { "sequence", "select sequence pattern type", 0, AV_OPT_TYPE_CONST, {.i64=PT_SEQUENCE }, INT_MIN, INT_MAX, DEC, "pattern_type" },
571 { "none", "disable pattern matching", 0, AV_OPT_TYPE_CONST, {.i64=PT_NONE }, INT_MIN, INT_MAX, DEC, "pattern_type" },
572
573 { "pixel_format", "set video pixel format", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
574 { "start_number", "set first number in the sequence", OFFSET(start_number), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, DEC },
575 { "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 },
576 { "video_size", "set video size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
577 { "frame_size", "force frame size in bytes", OFFSET(frame_size), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, DEC },
578 { "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" },
579 { "none", "none", 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 2, DEC, "ts_type" },
580 { "sec", "second precision", 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 2, DEC, "ts_type" },
581 { "ns", "nano second precision", 0, AV_OPT_TYPE_CONST, {.i64 = 2 }, 0, 2, DEC, "ts_type" },
582 { NULL },
583};
584
585#if CONFIG_IMAGE2_DEMUXER
586static const AVClass img2_class = {
587 .class_name = "image2 demuxer",
588 .item_name = av_default_item_name,
589 .option = ff_img_options,
590 .version = LIBAVUTIL_VERSION_INT,
591};
592AVInputFormat ff_image2_demuxer = {
593 .name = "image2",
594 .long_name = NULL_IF_CONFIG_SMALL("image2 sequence"),
595 .priv_data_size = sizeof(VideoDemuxData),
596 .read_probe = img_read_probe,
597 .read_header = ff_img_read_header,
598 .read_packet = ff_img_read_packet,
599 .read_close = img_read_close,
600 .read_seek = img_read_seek,
601 .flags = AVFMT_NOFILE,
602 .priv_class = &img2_class,
603};
604#endif
605#if CONFIG_IMAGE2PIPE_DEMUXER
606static const AVClass img2pipe_class = {
607 .class_name = "image2pipe demuxer",
608 .item_name = av_default_item_name,
609 .option = ff_img_options,
610 .version = LIBAVUTIL_VERSION_INT,
611};
612AVInputFormat ff_image2pipe_demuxer = {
613 .name = "image2pipe",
614 .long_name = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
615 .priv_data_size = sizeof(VideoDemuxData),
616 .read_header = ff_img_read_header,
617 .read_packet = ff_img_read_packet,
618 .priv_class = &img2pipe_class,
619};
620#endif
621
622static int bmp_probe(AVProbeData *p)
623{
624 const uint8_t *b = p->buf;
625 int ihsize;
626
627 if (AV_RB16(b) != 0x424d)
628 return 0;
629
630 ihsize = AV_RL32(b+14);
631 if (ihsize < 12 || ihsize > 255)
632 return 0;
633
634 if (!AV_RN32(b + 6)) {
635 return AVPROBE_SCORE_EXTENSION + 1;
636 }
637 return AVPROBE_SCORE_EXTENSION / 4;
638}
639
640static int dds_probe(AVProbeData *p)
641{
642 const uint8_t *b = p->buf;
643
644 if ( AV_RB64(b) == 0x444453207c000000
645 && AV_RL32(b + 8)
646 && AV_RL32(b + 12))
647 return AVPROBE_SCORE_MAX - 1;
648 return 0;
649}
650
651static int dpx_probe(AVProbeData *p)
652{
653 const uint8_t *b = p->buf;
654 int w, h;
655 int is_big = (AV_RN32(b) == AV_RN32("SDPX"));
656
657 if (p->buf_size < 0x304+8)
658 return 0;
659 w = is_big ? AV_RB32(p->buf + 0x304) : AV_RL32(p->buf + 0x304);
660 h = is_big ? AV_RB32(p->buf + 0x308) : AV_RL32(p->buf + 0x308);
661 if (w <= 0 || h <= 0)
662 return 0;
663
664 if (is_big || AV_RN32(b) == AV_RN32("XPDS"))
665 return AVPROBE_SCORE_EXTENSION + 1;
666 return 0;
667}
668
669static int exr_probe(AVProbeData *p)
670{
671 const uint8_t *b = p->buf;
672
673 if (AV_RL32(b) == 20000630)
674 return AVPROBE_SCORE_EXTENSION + 1;
675 return 0;
676}
677
678static int j2k_probe(AVProbeData *p)
679{
680 const uint8_t *b = p->buf;
681
682 if (AV_RB64(b) == 0x0000000c6a502020 ||
683 AV_RB32(b) == 0xff4fff51)
684 return AVPROBE_SCORE_EXTENSION + 1;
685 return 0;
686}
687
688static int jpeg_probe(AVProbeData *p)
689{
690 const uint8_t *b = p->buf;
691 int i, state = SOI;
692
693 if (AV_RB16(b) != 0xFFD8 ||
694 AV_RB32(b) == 0xFFD8FFF7)
695 return 0;
696
697 b += 2;
698 for (i = 0; i < p->buf_size - 3; i++) {
699 int c;
700 if (b[i] != 0xFF)
701 continue;
702 c = b[i + 1];
703 switch (c) {
704 case SOI:
705 return 0;
706 case SOF0:
707 case SOF1:
708 case SOF2:
709 case SOF3:
710 case SOF5:
711 case SOF6:
712 case SOF7:
713 i += AV_RB16(&b[i + 2]) + 1;
714 if (state != SOI)
715 return 0;
716 state = SOF0;
717 break;
718 case SOS:
719 i += AV_RB16(&b[i + 2]) + 1;
720 if (state != SOF0 && state != SOS)
721 return 0;
722 state = SOS;
723 break;
724 case EOI:
725 if (state != SOS)
726 return 0;
727 state = EOI;
728 break;
729 case DQT:
730 case APP0:
731 case APP1:
732 case APP2:
733 case APP3:
734 case APP4:
735 case APP5:
736 case APP6:
737 case APP7:
738 case APP8:
739 case APP9:
740 case APP10:
741 case APP11:
742 case APP12:
743 case APP13:
744 case APP14:
745 case APP15:
746 case COM:
747 i += AV_RB16(&b[i + 2]) + 1;
748 break;
749 default:
750 if ( (c > TEM && c < SOF0)
751 || c == JPG)
752 return 0;
753 }
754 }
755
756 if (state == EOI)
757 return AVPROBE_SCORE_EXTENSION + 1;
758 if (state == SOS)
759 return AVPROBE_SCORE_EXTENSION / 2;
760 return AVPROBE_SCORE_EXTENSION / 8;
761}
762
763static int jpegls_probe(AVProbeData *p)
764{
765 const uint8_t *b = p->buf;
766
767 if (AV_RB32(b) == 0xffd8fff7)
768 return AVPROBE_SCORE_EXTENSION + 1;
769 return 0;
770}
771
772static int pcx_probe(AVProbeData *p)
773{
774 const uint8_t *b = p->buf;
775
776 if ( p->buf_size < 128
777 || b[0] != 10
778 || b[1] > 5
779 || b[2] > 1
780 || av_popcount(b[3]) != 1 || b[3] > 8
781 || AV_RL16(&b[4]) > AV_RL16(&b[8])
782 || AV_RL16(&b[6]) > AV_RL16(&b[10])
783 || b[64])
784 return 0;
785 b += 73;
786 while (++b < p->buf + 128)
787 if (*b)
788 return AVPROBE_SCORE_EXTENSION / 4;
789
790 return AVPROBE_SCORE_EXTENSION + 1;
791}
792
793static int qdraw_probe(AVProbeData *p)
794{
795 const uint8_t *b = p->buf;
796
797 if ( p->buf_size >= 528
798 && (AV_RB64(b + 520) & 0xFFFFFFFFFFFF) == 0x001102ff0c00
799 && AV_RB16(b + 520)
800 && AV_RB16(b + 518))
801 return AVPROBE_SCORE_MAX * 3 / 4;
802 if ( (AV_RB64(b + 8) & 0xFFFFFFFFFFFF) == 0x001102ff0c00
803 && AV_RB16(b + 8)
804 && AV_RB16(b + 6))
805 return AVPROBE_SCORE_EXTENSION / 4;
806 return 0;
807}
808
809static int pictor_probe(AVProbeData *p)
810{
811 const uint8_t *b = p->buf;
812
813 if (AV_RL16(b) == 0x1234)
814 return AVPROBE_SCORE_EXTENSION / 4;
815 return 0;
816}
817
818static int png_probe(AVProbeData *p)
819{
820 const uint8_t *b = p->buf;
821
822 if (AV_RB64(b) == 0x89504e470d0a1a0a)
823 return AVPROBE_SCORE_MAX - 1;
824 return 0;
825}
826
827static int psd_probe(AVProbeData *p)
828{
829 const uint8_t *b = p->buf;
830 int ret = 0;
831 uint16_t color_mode;
832
833 if (AV_RL32(b) == MKTAG('8','B','P','S')) {
834 ret += 1;
835 } else {
836 return 0;
837 }
838
839 if ((b[4] == 0) && (b[5] == 1)) {/* version 1 is PSD, version 2 is PSB */
840 ret += 1;
841 } else {
842 return 0;
843 }
844
845 if ((AV_RL32(b+6) == 0) && (AV_RL16(b+10) == 0))/* reserved must be 0 */
846 ret += 1;
847
848 color_mode = AV_RB16(b+24);
849 if ((color_mode <= 9) && (color_mode != 5) && (color_mode != 6))
850 ret += 1;
851
852 return AVPROBE_SCORE_EXTENSION + ret;
853}
854
855static int sgi_probe(AVProbeData *p)
856{
857 const uint8_t *b = p->buf;
858
859 if (AV_RB16(b) == 474 &&
860 (b[2] & ~1) == 0 &&
861 (b[3] & ~3) == 0 && b[3] &&
862 (AV_RB16(b + 4) & ~7) == 0 && AV_RB16(b + 4))
863 return AVPROBE_SCORE_EXTENSION + 1;
864 return 0;
865}
866
867static int sunrast_probe(AVProbeData *p)
868{
869 const uint8_t *b = p->buf;
870
871 if (AV_RB32(b) == 0x59a66a95)
872 return AVPROBE_SCORE_EXTENSION + 1;
873 return 0;
874}
875
876static int tiff_probe(AVProbeData *p)
877{
878 const uint8_t *b = p->buf;
879
880 if (AV_RB32(b) == 0x49492a00 ||
881 AV_RB32(b) == 0x4D4D002a)
882 return AVPROBE_SCORE_EXTENSION + 1;
883 return 0;
884}
885
886static int webp_probe(AVProbeData *p)
887{
888 const uint8_t *b = p->buf;
889
890 if (AV_RB32(b) == 0x52494646 &&
891 AV_RB32(b + 8) == 0x57454250)
892 return AVPROBE_SCORE_MAX - 1;
893 return 0;
894}
895
896static int pnm_magic_check(const AVProbeData *p, int magic)
897{
898 const uint8_t *b = p->buf;
899
900 return b[0] == 'P' && b[1] == magic + '0';
901}
902
903static inline int pnm_probe(const AVProbeData *p)
904{
905 const uint8_t *b = p->buf;
906
907 while (b[2] == '\r')
908 b++;
909 if (b[2] == '\n' && (b[3] == '#' || (b[3] >= '0' && b[3] <= '9')))
910 return AVPROBE_SCORE_EXTENSION + 2;
911 return 0;
912}
913
914static int pbm_probe(AVProbeData *p)
915{
916 return pnm_magic_check(p, 1) || pnm_magic_check(p, 4) ? pnm_probe(p) : 0;
917}
918
919static inline int pgmx_probe(AVProbeData *p)
920{
921 return pnm_magic_check(p, 2) || pnm_magic_check(p, 5) ? pnm_probe(p) : 0;
922}
923
924static int pgm_probe(AVProbeData *p)
925{
926 int ret = pgmx_probe(p);
927 return ret && !av_match_ext(p->filename, "pgmyuv") ? ret : 0;
928}
929
930static int pgmyuv_probe(AVProbeData *p) // custom FFmpeg format recognized by file extension
931{
932 int ret = pgmx_probe(p);
933 return ret && av_match_ext(p->filename, "pgmyuv") ? ret : 0;
934}
935
936static int ppm_probe(AVProbeData *p)
937{
938 return pnm_magic_check(p, 3) || pnm_magic_check(p, 6) ? pnm_probe(p) : 0;
939}
940
941static int pam_probe(AVProbeData *p)
942{
943 return pnm_magic_check(p, 7) ? pnm_probe(p) : 0;
944}
945
946static int xpm_probe(AVProbeData *p)
947{
948 const uint8_t *b = p->buf;
949
950 if (AV_RB64(b) == 0x2f2a2058504d202a && *(b+8) == '/')
951 return AVPROBE_SCORE_MAX - 1;
952 return 0;
953}
954
955#define IMAGEAUTO_DEMUXER(imgname, codecid)\
956static const AVClass imgname ## _class = {\
957 .class_name = AV_STRINGIFY(imgname) " demuxer",\
958 .item_name = av_default_item_name,\
959 .option = ff_img_options,\
960 .version = LIBAVUTIL_VERSION_INT,\
961};\
962AVInputFormat ff_image_ ## imgname ## _pipe_demuxer = {\
963 .name = AV_STRINGIFY(imgname) "_pipe",\
964 .long_name = NULL_IF_CONFIG_SMALL("piped " AV_STRINGIFY(imgname) " sequence"),\
965 .priv_data_size = sizeof(VideoDemuxData),\
966 .read_probe = imgname ## _probe,\
967 .read_header = ff_img_read_header,\
968 .read_packet = ff_img_read_packet,\
969 .priv_class = & imgname ## _class,\
970 .flags = AVFMT_GENERIC_INDEX, \
971 .raw_codec_id = codecid,\
972};
973
974IMAGEAUTO_DEMUXER(bmp, AV_CODEC_ID_BMP)
975IMAGEAUTO_DEMUXER(dds, AV_CODEC_ID_DDS)
976IMAGEAUTO_DEMUXER(dpx, AV_CODEC_ID_DPX)
977IMAGEAUTO_DEMUXER(exr, AV_CODEC_ID_EXR)
978IMAGEAUTO_DEMUXER(j2k, AV_CODEC_ID_JPEG2000)
979IMAGEAUTO_DEMUXER(jpeg, AV_CODEC_ID_MJPEG)
980IMAGEAUTO_DEMUXER(jpegls, AV_CODEC_ID_JPEGLS)
981IMAGEAUTO_DEMUXER(pam, AV_CODEC_ID_PAM)
982IMAGEAUTO_DEMUXER(pbm, AV_CODEC_ID_PBM)
983IMAGEAUTO_DEMUXER(pcx, AV_CODEC_ID_PCX)
984IMAGEAUTO_DEMUXER(pgm, AV_CODEC_ID_PGM)
985IMAGEAUTO_DEMUXER(pgmyuv, AV_CODEC_ID_PGMYUV)
986IMAGEAUTO_DEMUXER(pictor, AV_CODEC_ID_PICTOR)
987IMAGEAUTO_DEMUXER(png, AV_CODEC_ID_PNG)
988IMAGEAUTO_DEMUXER(ppm, AV_CODEC_ID_PPM)
989IMAGEAUTO_DEMUXER(psd, AV_CODEC_ID_PSD)
990IMAGEAUTO_DEMUXER(qdraw, AV_CODEC_ID_QDRAW)
991IMAGEAUTO_DEMUXER(sgi, AV_CODEC_ID_SGI)
992IMAGEAUTO_DEMUXER(sunrast, AV_CODEC_ID_SUNRAST)
993IMAGEAUTO_DEMUXER(tiff, AV_CODEC_ID_TIFF)
994IMAGEAUTO_DEMUXER(webp, AV_CODEC_ID_WEBP)
995IMAGEAUTO_DEMUXER(xpm, AV_CODEC_ID_XPM)
996
generated by cgit at 2024-05-17 06:29:48 (GMT)