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Imported Debian version 2.4.3~trusty1
[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;
363 int i;
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
439 if (av_new_packet(pkt, size[0] + size[1] + size[2]) < 0)
440 return AVERROR(ENOMEM);
441 pkt->stream_index = 0;
442 pkt->flags |= AV_PKT_FLAG_KEY;
443 if (s->ts_from_file) {
444 struct stat img_stat;
445 if (stat(filename, &img_stat))
446 return AVERROR(EIO);
447 pkt->pts = (int64_t)img_stat.st_mtime;
448#if HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
449 if (s->ts_from_file == 2)
450 pkt->pts = 1000000000*pkt->pts + img_stat.st_mtim.tv_nsec;
451#endif
452 av_add_index_entry(s1->streams[0], s->img_number, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
453 } else if (!s->is_pipe) {
454 pkt->pts = s->pts;
455 }
456
457 if (s->is_pipe)
458 pkt->pos = avio_tell(f[0]);
459
460 pkt->size = 0;
461 for (i = 0; i < 3; i++) {
462 if (f[i]) {
463 ret[i] = avio_read(f[i], pkt->data + pkt->size, size[i]);
464 if (s->loop && s->is_pipe && ret[i] == AVERROR_EOF) {
465 if (avio_seek(f[i], 0, SEEK_SET) >= 0) {
466 pkt->pos = 0;
467 ret[i] = avio_read(f[i], pkt->data + pkt->size, size[i]);
468 }
469 }
470 if (!s->is_pipe)
471 avio_close(f[i]);
472 if (ret[i] > 0)
473 pkt->size += ret[i];
474 }
475 }
476
477 if (ret[0] <= 0 || ret[1] < 0 || ret[2] < 0) {
478 av_free_packet(pkt);
479 if (ret[0] < 0) {
480 return ret[0];
481 } else if (ret[1] < 0) {
482 return ret[1];
483 } else if (ret[2] < 0)
484 return ret[2];
485 return AVERROR_EOF;
486 } else {
487 s->img_count++;
488 s->img_number++;
489 s->pts++;
490 return 0;
491 }
492}
493
494static int img_read_close(struct AVFormatContext* s1)
495{
496 VideoDemuxData *s = s1->priv_data;
497#if HAVE_GLOB
498 if (s->use_glob) {
499 globfree(&s->globstate);
500 }
501#endif
502 return 0;
503}
504
505static int img_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
506{
507 VideoDemuxData *s1 = s->priv_data;
508 AVStream *st = s->streams[0];
509
510 if (s1->ts_from_file) {
511 int index = av_index_search_timestamp(st, timestamp, flags);
512 if(index < 0)
513 return -1;
514 s1->img_number = st->index_entries[index].pos;
515 return 0;
516 }
517
518 if (timestamp < 0 || !s1->loop && timestamp > s1->img_last - s1->img_first)
519 return -1;
520 s1->img_number = timestamp%(s1->img_last - s1->img_first + 1) + s1->img_first;
521 s1->pts = timestamp;
522 return 0;
523}
524
525#define OFFSET(x) offsetof(VideoDemuxData, x)
526#define DEC AV_OPT_FLAG_DECODING_PARAM
527const AVOption ff_img_options[] = {
528 { "framerate", "set the video framerate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, DEC },
529 { "loop", "force loop over input file sequence", OFFSET(loop), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, DEC },
530
531 { "pattern_type", "set pattern type", OFFSET(pattern_type), AV_OPT_TYPE_INT, {.i64=PT_GLOB_SEQUENCE}, 0, INT_MAX, DEC, "pattern_type"},
532 { "glob_sequence","select glob/sequence pattern type", 0, AV_OPT_TYPE_CONST, {.i64=PT_GLOB_SEQUENCE}, INT_MIN, INT_MAX, DEC, "pattern_type" },
533 { "glob", "select glob pattern type", 0, AV_OPT_TYPE_CONST, {.i64=PT_GLOB }, INT_MIN, INT_MAX, DEC, "pattern_type" },
534 { "sequence", "select sequence pattern type", 0, AV_OPT_TYPE_CONST, {.i64=PT_SEQUENCE }, INT_MIN, INT_MAX, DEC, "pattern_type" },
535
536 { "pixel_format", "set video pixel format", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
537 { "start_number", "set first number in the sequence", OFFSET(start_number), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, DEC },
538 { "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 },
539 { "video_size", "set video size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
540 { "frame_size", "force frame size in bytes", OFFSET(frame_size), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, DEC },
541 { "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" },
542 { "none", "none", 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 2, DEC, "ts_type" },
543 { "sec", "second precision", 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 2, DEC, "ts_type" },
544 { "ns", "nano second precision", 0, AV_OPT_TYPE_CONST, {.i64 = 2 }, 0, 2, DEC, "ts_type" },
545 { NULL },
546};
547
548#if CONFIG_IMAGE2_DEMUXER
549static const AVClass img2_class = {
550 .class_name = "image2 demuxer",
551 .item_name = av_default_item_name,
552 .option = ff_img_options,
553 .version = LIBAVUTIL_VERSION_INT,
554};
555AVInputFormat ff_image2_demuxer = {
556 .name = "image2",
557 .long_name = NULL_IF_CONFIG_SMALL("image2 sequence"),
558 .priv_data_size = sizeof(VideoDemuxData),
559 .read_probe = img_read_probe,
560 .read_header = ff_img_read_header,
561 .read_packet = ff_img_read_packet,
562 .read_close = img_read_close,
563 .read_seek = img_read_seek,
564 .flags = AVFMT_NOFILE,
565 .priv_class = &img2_class,
566};
567#endif
568#if CONFIG_IMAGE2PIPE_DEMUXER
569static const AVClass img2pipe_class = {
570 .class_name = "image2pipe demuxer",
571 .item_name = av_default_item_name,
572 .option = ff_img_options,
573 .version = LIBAVUTIL_VERSION_INT,
574};
575AVInputFormat ff_image2pipe_demuxer = {
576 .name = "image2pipe",
577 .long_name = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
578 .priv_data_size = sizeof(VideoDemuxData),
579 .read_header = ff_img_read_header,
580 .read_packet = ff_img_read_packet,
581 .priv_class = &img2pipe_class,
582};
583#endif
584
585static int bmp_probe(AVProbeData *p)
586{
587 const uint8_t *b = p->buf;
588 int ihsize;
589
590 if (AV_RB16(b) != 0x424d)
591 return 0;
592
593 ihsize = AV_RL32(b+14);
594 if (ihsize < 12 || ihsize > 255)
595 return 0;
596
597 if (!AV_RN32(b + 6)) {
598 return AVPROBE_SCORE_EXTENSION - 1; // lower than extension as bmp pipe has bugs
599 } else {
600 return AVPROBE_SCORE_EXTENSION / 4;
601 }
602 return 0;
603}
604
605static int dpx_probe(AVProbeData *p)
606{
607 const uint8_t *b = p->buf;
608
609 if (AV_RN32(b) == AV_RN32("SDPX") || AV_RN32(b) == AV_RN32("XPDS"))
610 return AVPROBE_SCORE_EXTENSION + 1;
611 return 0;
612}
613
614static int exr_probe(AVProbeData *p)
615{
616 const uint8_t *b = p->buf;
617
618 if (AV_RL32(b) == 20000630)
619 return AVPROBE_SCORE_EXTENSION + 1;
620 return 0;
621}
622
623static int j2k_probe(AVProbeData *p)
624{
625 const uint8_t *b = p->buf;
626
627 if (AV_RB64(b) == 0x0000000c6a502020 ||
628 AV_RB32(b) == 0xff4fff51)
629 return AVPROBE_SCORE_EXTENSION + 1;
630 return 0;
631}
632
633static int jpegls_probe(AVProbeData *p)
634{
635 const uint8_t *b = p->buf;
636
637 if (AV_RB32(b) == 0xffd8fff7)
638 return AVPROBE_SCORE_EXTENSION + 1;
639 return 0;
640}
641
642static int pictor_probe(AVProbeData *p)
643{
644 const uint8_t *b = p->buf;
645
646 if (AV_RL16(b) == 0x1234)
647 return AVPROBE_SCORE_EXTENSION / 4;
648 return 0;
649}
650
651static int png_probe(AVProbeData *p)
652{
653 const uint8_t *b = p->buf;
654
655 if (AV_RB64(b) == 0x89504e470d0a1a0a)
656 return AVPROBE_SCORE_MAX - 1;
657 return 0;
658}
659
660static int sgi_probe(AVProbeData *p)
661{
662 const uint8_t *b = p->buf;
663
664 if (AV_RB16(b) == 474 &&
665 (b[2] & ~1) == 0 &&
666 (b[3] & ~3) == 0 && b[3] &&
667 (AV_RB16(b + 4) & ~7) == 0 && AV_RB16(b + 4))
668 return AVPROBE_SCORE_EXTENSION + 1;
669 return 0;
670}
671
672static int sunrast_probe(AVProbeData *p)
673{
674 const uint8_t *b = p->buf;
675
676 if (AV_RB32(b) == 0x59a66a95)
677 return AVPROBE_SCORE_EXTENSION + 1;
678 return 0;
679}
680
681static int tiff_probe(AVProbeData *p)
682{
683 const uint8_t *b = p->buf;
684
685 if (AV_RB32(b) == 0x49492a00 ||
686 AV_RB32(b) == 0x4D4D002a)
687 return AVPROBE_SCORE_EXTENSION + 1;
688 return 0;
689}
690
691static int webp_probe(AVProbeData *p)
692{
693 const uint8_t *b = p->buf;
694
695 if (AV_RB32(b) == 0x52494646 &&
696 AV_RB32(b + 8) == 0x57454250)
697 return AVPROBE_SCORE_MAX - 1;
698 return 0;
699}
700
701#define IMAGEAUTO_DEMUXER(imgname, codecid)\
702static const AVClass imgname ## _class = {\
703 .class_name = AV_STRINGIFY(imgname) " demuxer",\
704 .item_name = av_default_item_name,\
705 .option = ff_img_options,\
706 .version = LIBAVUTIL_VERSION_INT,\
707};\
708AVInputFormat ff_image_ ## imgname ## _pipe_demuxer = {\
709 .name = AV_STRINGIFY(imgname) "_pipe",\
710 .long_name = NULL_IF_CONFIG_SMALL("piped " AV_STRINGIFY(imgname) " sequence"),\
711 .priv_data_size = sizeof(VideoDemuxData),\
712 .read_probe = imgname ## _probe,\
713 .read_header = ff_img_read_header,\
714 .read_packet = ff_img_read_packet,\
715 .priv_class = & imgname ## _class,\
716 .flags = AVFMT_GENERIC_INDEX, \
717 .raw_codec_id = codecid,\
718};
719
720IMAGEAUTO_DEMUXER(bmp, AV_CODEC_ID_BMP)
721IMAGEAUTO_DEMUXER(dpx, AV_CODEC_ID_DPX)
722IMAGEAUTO_DEMUXER(exr, AV_CODEC_ID_EXR)
723IMAGEAUTO_DEMUXER(j2k, AV_CODEC_ID_JPEG2000)
724IMAGEAUTO_DEMUXER(jpegls, AV_CODEC_ID_JPEGLS)
725IMAGEAUTO_DEMUXER(pictor, AV_CODEC_ID_PICTOR)
726IMAGEAUTO_DEMUXER(png, AV_CODEC_ID_PNG)
727IMAGEAUTO_DEMUXER(sgi, AV_CODEC_ID_SGI)
728IMAGEAUTO_DEMUXER(sunrast, AV_CODEC_ID_SUNRAST)
729IMAGEAUTO_DEMUXER(tiff, AV_CODEC_ID_TIFF)
730IMAGEAUTO_DEMUXER(webp, AV_CODEC_ID_WEBP)
ffmpeg Piment Noir Debian package repository