Drop some bogus Doxygen documentation.
[libav.git] / cmdutils.c
1 /*
2 * Various utilities for command line tools
3 * Copyright (c) 2000-2003 Fabrice Bellard
4 *
5 * This file is part of Libav.
6 *
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include <string.h>
23 #include <stdint.h>
24 #include <stdlib.h>
25 #include <errno.h>
26 #include <math.h>
27
28 /* Include only the enabled headers since some compilers (namely, Sun
29 Studio) will not omit unused inline functions and create undefined
30 references to libraries that are not being built. */
31
32 #include "config.h"
33 #include "libavformat/avformat.h"
34 #include "libavfilter/avfilter.h"
35 #include "libavdevice/avdevice.h"
36 #include "libavresample/avresample.h"
37 #include "libswscale/swscale.h"
38 #include "libavutil/avassert.h"
39 #include "libavutil/avstring.h"
40 #include "libavutil/mathematics.h"
41 #include "libavutil/imgutils.h"
42 #include "libavutil/parseutils.h"
43 #include "libavutil/pixdesc.h"
44 #include "libavutil/eval.h"
45 #include "libavutil/dict.h"
46 #include "libavutil/opt.h"
47 #include "libavutil/cpu.h"
48 #include "avversion.h"
49 #include "cmdutils.h"
50 #if CONFIG_NETWORK
51 #include "libavformat/network.h"
52 #endif
53 #if HAVE_SYS_RESOURCE_H
54 #include <sys/time.h>
55 #include <sys/resource.h>
56 #endif
57
58 struct SwsContext *sws_opts;
59 AVDictionary *format_opts, *codec_opts, *resample_opts;
60
61 static const int this_year = 2016;
62
63 void init_opts(void)
64 {
65 #if CONFIG_SWSCALE
66 sws_opts = sws_getContext(16, 16, 0, 16, 16, 0, SWS_BICUBIC,
67 NULL, NULL, NULL);
68 #endif
69 }
70
71 void uninit_opts(void)
72 {
73 #if CONFIG_SWSCALE
74 sws_freeContext(sws_opts);
75 sws_opts = NULL;
76 #endif
77 av_dict_free(&format_opts);
78 av_dict_free(&codec_opts);
79 av_dict_free(&resample_opts);
80 }
81
82 void log_callback_help(void *ptr, int level, const char *fmt, va_list vl)
83 {
84 vfprintf(stdout, fmt, vl);
85 }
86
87 static void (*program_exit)(int ret);
88
89 void register_exit(void (*cb)(int ret))
90 {
91 program_exit = cb;
92 }
93
94 void exit_program(int ret)
95 {
96 if (program_exit)
97 program_exit(ret);
98
99 exit(ret);
100 }
101
102 double parse_number_or_die(const char *context, const char *numstr, int type,
103 double min, double max)
104 {
105 char *tail;
106 const char *error;
107 double d = av_strtod(numstr, &tail);
108 if (*tail)
109 error = "Expected number for %s but found: %s\n";
110 else if (d < min || d > max)
111 error = "The value for %s was %s which is not within %f - %f\n";
112 else if (type == OPT_INT64 && (int64_t)d != d)
113 error = "Expected int64 for %s but found %s\n";
114 else if (type == OPT_INT && (int)d != d)
115 error = "Expected int for %s but found %s\n";
116 else
117 return d;
118 av_log(NULL, AV_LOG_FATAL, error, context, numstr, min, max);
119 exit_program(1);
120 return 0;
121 }
122
123 int64_t parse_time_or_die(const char *context, const char *timestr,
124 int is_duration)
125 {
126 int64_t us;
127 if (av_parse_time(&us, timestr, is_duration) < 0) {
128 av_log(NULL, AV_LOG_FATAL, "Invalid %s specification for %s: %s\n",
129 is_duration ? "duration" : "date", context, timestr);
130 exit_program(1);
131 }
132 return us;
133 }
134
135 void show_help_options(const OptionDef *options, const char *msg, int req_flags,
136 int rej_flags, int alt_flags)
137 {
138 const OptionDef *po;
139 int first;
140
141 first = 1;
142 for (po = options; po->name != NULL; po++) {
143 char buf[64];
144
145 if (((po->flags & req_flags) != req_flags) ||
146 (alt_flags && !(po->flags & alt_flags)) ||
147 (po->flags & rej_flags))
148 continue;
149
150 if (first) {
151 printf("%s\n", msg);
152 first = 0;
153 }
154 av_strlcpy(buf, po->name, sizeof(buf));
155 if (po->argname) {
156 av_strlcat(buf, " ", sizeof(buf));
157 av_strlcat(buf, po->argname, sizeof(buf));
158 }
159 printf("-%-17s %s\n", buf, po->help);
160 }
161 printf("\n");
162 }
163
164 void show_help_children(const AVClass *class, int flags)
165 {
166 const AVClass *child = NULL;
167 av_opt_show2(&class, NULL, flags, 0);
168 printf("\n");
169
170 while (child = av_opt_child_class_next(class, child))
171 show_help_children(child, flags);
172 }
173
174 static const OptionDef *find_option(const OptionDef *po, const char *name)
175 {
176 const char *p = strchr(name, ':');
177 int len = p ? p - name : strlen(name);
178
179 while (po->name) {
180 if (!strncmp(name, po->name, len) && strlen(po->name) == len)
181 break;
182 po++;
183 }
184 return po;
185 }
186
187 /* _WIN32 means using the windows libc - cygwin doesn't define that
188 * by default. HAVE_COMMANDLINETOARGVW is true on cygwin, while
189 * it doesn't provide the actual command line via GetCommandLineW(). */
190 #if HAVE_COMMANDLINETOARGVW && defined(_WIN32)
191 #include <windows.h>
192 #include <shellapi.h>
193 /* Will be leaked on exit */
194 static char** win32_argv_utf8 = NULL;
195 static int win32_argc = 0;
196
197 /**
198 * Prepare command line arguments for executable.
199 * For Windows - perform wide-char to UTF-8 conversion.
200 * Input arguments should be main() function arguments.
201 * @param argc_ptr Arguments number (including executable)
202 * @param argv_ptr Arguments list.
203 */
204 static void prepare_app_arguments(int *argc_ptr, char ***argv_ptr)
205 {
206 char *argstr_flat;
207 wchar_t **argv_w;
208 int i, buffsize = 0, offset = 0;
209
210 if (win32_argv_utf8) {
211 *argc_ptr = win32_argc;
212 *argv_ptr = win32_argv_utf8;
213 return;
214 }
215
216 win32_argc = 0;
217 argv_w = CommandLineToArgvW(GetCommandLineW(), &win32_argc);
218 if (win32_argc <= 0 || !argv_w)
219 return;
220
221 /* determine the UTF-8 buffer size (including NULL-termination symbols) */
222 for (i = 0; i < win32_argc; i++)
223 buffsize += WideCharToMultiByte(CP_UTF8, 0, argv_w[i], -1,
224 NULL, 0, NULL, NULL);
225
226 win32_argv_utf8 = av_mallocz(sizeof(char *) * (win32_argc + 1) + buffsize);
227 argstr_flat = (char *)win32_argv_utf8 + sizeof(char *) * (win32_argc + 1);
228 if (!win32_argv_utf8) {
229 LocalFree(argv_w);
230 return;
231 }
232
233 for (i = 0; i < win32_argc; i++) {
234 win32_argv_utf8[i] = &argstr_flat[offset];
235 offset += WideCharToMultiByte(CP_UTF8, 0, argv_w[i], -1,
236 &argstr_flat[offset],
237 buffsize - offset, NULL, NULL);
238 }
239 win32_argv_utf8[i] = NULL;
240 LocalFree(argv_w);
241
242 *argc_ptr = win32_argc;
243 *argv_ptr = win32_argv_utf8;
244 }
245 #else
246 static inline void prepare_app_arguments(int *argc_ptr, char ***argv_ptr)
247 {
248 /* nothing to do */
249 }
250 #endif /* HAVE_COMMANDLINETOARGVW */
251
252 static int write_option(void *optctx, const OptionDef *po, const char *opt,
253 const char *arg)
254 {
255 /* new-style options contain an offset into optctx, old-style address of
256 * a global var*/
257 void *dst = po->flags & (OPT_OFFSET | OPT_SPEC) ?
258 (uint8_t *)optctx + po->u.off : po->u.dst_ptr;
259 int *dstcount;
260
261 if (po->flags & OPT_SPEC) {
262 SpecifierOpt **so = dst;
263 char *p = strchr(opt, ':');
264 char *str;
265
266 dstcount = (int *)(so + 1);
267 *so = grow_array(*so, sizeof(**so), dstcount, *dstcount + 1);
268 str = av_strdup(p ? p + 1 : "");
269 if (!str)
270 return AVERROR(ENOMEM);
271 (*so)[*dstcount - 1].specifier = str;
272 dst = &(*so)[*dstcount - 1].u;
273 }
274
275 if (po->flags & OPT_STRING) {
276 char *str;
277 str = av_strdup(arg);
278 av_freep(dst);
279 if (!str)
280 return AVERROR(ENOMEM);
281 *(char **)dst = str;
282 } else if (po->flags & OPT_BOOL || po->flags & OPT_INT) {
283 *(int *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT_MIN, INT_MAX);
284 } else if (po->flags & OPT_INT64) {
285 *(int64_t *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT64_MIN, INT64_MAX);
286 } else if (po->flags & OPT_TIME) {
287 *(int64_t *)dst = parse_time_or_die(opt, arg, 1);
288 } else if (po->flags & OPT_FLOAT) {
289 *(float *)dst = parse_number_or_die(opt, arg, OPT_FLOAT, -INFINITY, INFINITY);
290 } else if (po->flags & OPT_DOUBLE) {
291 *(double *)dst = parse_number_or_die(opt, arg, OPT_DOUBLE, -INFINITY, INFINITY);
292 } else if (po->u.func_arg) {
293 int ret = po->u.func_arg(optctx, opt, arg);
294 if (ret < 0) {
295 av_log(NULL, AV_LOG_ERROR,
296 "Failed to set value '%s' for option '%s'\n", arg, opt);
297 return ret;
298 }
299 }
300 if (po->flags & OPT_EXIT)
301 exit_program(0);
302
303 return 0;
304 }
305
306 int parse_option(void *optctx, const char *opt, const char *arg,
307 const OptionDef *options)
308 {
309 const OptionDef *po;
310 int ret;
311
312 po = find_option(options, opt);
313 if (!po->name && opt[0] == 'n' && opt[1] == 'o') {
314 /* handle 'no' bool option */
315 po = find_option(options, opt + 2);
316 if ((po->name && (po->flags & OPT_BOOL)))
317 arg = "0";
318 } else if (po->flags & OPT_BOOL)
319 arg = "1";
320
321 if (!po->name)
322 po = find_option(options, "default");
323 if (!po->name) {
324 av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'\n", opt);
325 return AVERROR(EINVAL);
326 }
327 if (po->flags & HAS_ARG && !arg) {
328 av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'\n", opt);
329 return AVERROR(EINVAL);
330 }
331
332 ret = write_option(optctx, po, opt, arg);
333 if (ret < 0)
334 return ret;
335
336 return !!(po->flags & HAS_ARG);
337 }
338
339 void parse_options(void *optctx, int argc, char **argv, const OptionDef *options,
340 void (*parse_arg_function)(void *, const char*))
341 {
342 const char *opt;
343 int optindex, handleoptions = 1, ret;
344
345 /* perform system-dependent conversions for arguments list */
346 prepare_app_arguments(&argc, &argv);
347
348 /* parse options */
349 optindex = 1;
350 while (optindex < argc) {
351 opt = argv[optindex++];
352
353 if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
354 if (opt[1] == '-' && opt[2] == '\0') {
355 handleoptions = 0;
356 continue;
357 }
358 opt++;
359
360 if ((ret = parse_option(optctx, opt, argv[optindex], options)) < 0)
361 exit_program(1);
362 optindex += ret;
363 } else {
364 if (parse_arg_function)
365 parse_arg_function(optctx, opt);
366 }
367 }
368 }
369
370 int parse_optgroup(void *optctx, OptionGroup *g)
371 {
372 int i, ret;
373
374 av_log(NULL, AV_LOG_DEBUG, "Parsing a group of options: %s %s.\n",
375 g->group_def->name, g->arg);
376
377 for (i = 0; i < g->nb_opts; i++) {
378 Option *o = &g->opts[i];
379
380 if (g->group_def->flags &&
381 !(g->group_def->flags & o->opt->flags)) {
382 av_log(NULL, AV_LOG_ERROR, "Option %s (%s) cannot be applied to "
383 "%s %s -- you are trying to apply an input option to an "
384 "output file or vice versa. Move this option before the "
385 "file it belongs to.\n", o->key, o->opt->help,
386 g->group_def->name, g->arg);
387 return AVERROR(EINVAL);
388 }
389
390 av_log(NULL, AV_LOG_DEBUG, "Applying option %s (%s) with argument %s.\n",
391 o->key, o->opt->help, o->val);
392
393 ret = write_option(optctx, o->opt, o->key, o->val);
394 if (ret < 0)
395 return ret;
396 }
397
398 av_log(NULL, AV_LOG_DEBUG, "Successfully parsed a group of options.\n");
399
400 return 0;
401 }
402
403 int locate_option(int argc, char **argv, const OptionDef *options,
404 const char *optname)
405 {
406 const OptionDef *po;
407 int i;
408
409 for (i = 1; i < argc; i++) {
410 const char *cur_opt = argv[i];
411
412 if (*cur_opt++ != '-')
413 continue;
414
415 po = find_option(options, cur_opt);
416 if (!po->name && cur_opt[0] == 'n' && cur_opt[1] == 'o')
417 po = find_option(options, cur_opt + 2);
418
419 if ((!po->name && !strcmp(cur_opt, optname)) ||
420 (po->name && !strcmp(optname, po->name)))
421 return i;
422
423 if (!po->name || po->flags & HAS_ARG)
424 i++;
425 }
426 return 0;
427 }
428
429 void parse_loglevel(int argc, char **argv, const OptionDef *options)
430 {
431 int idx = locate_option(argc, argv, options, "loglevel");
432 if (!idx)
433 idx = locate_option(argc, argv, options, "v");
434 if (idx && argv[idx + 1])
435 opt_loglevel(NULL, "loglevel", argv[idx + 1]);
436 }
437
438 #define FLAGS (o->type == AV_OPT_TYPE_FLAGS) ? AV_DICT_APPEND : 0
439 int opt_default(void *optctx, const char *opt, const char *arg)
440 {
441 const AVOption *o;
442 char opt_stripped[128];
443 const char *p;
444 const AVClass *cc = avcodec_get_class(), *fc = avformat_get_class();
445 #if CONFIG_AVRESAMPLE
446 const AVClass *rc = avresample_get_class();
447 #endif
448 #if CONFIG_SWSCALE
449 const AVClass *sc = sws_get_class();
450 #endif
451
452 if (!(p = strchr(opt, ':')))
453 p = opt + strlen(opt);
454 av_strlcpy(opt_stripped, opt, FFMIN(sizeof(opt_stripped), p - opt + 1));
455
456 if ((o = av_opt_find(&cc, opt_stripped, NULL, 0,
457 AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) ||
458 ((opt[0] == 'v' || opt[0] == 'a' || opt[0] == 's') &&
459 (o = av_opt_find(&cc, opt + 1, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ))))
460 av_dict_set(&codec_opts, opt, arg, FLAGS);
461 else if ((o = av_opt_find(&fc, opt, NULL, 0,
462 AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)))
463 av_dict_set(&format_opts, opt, arg, FLAGS);
464 #if CONFIG_AVRESAMPLE
465 else if ((o = av_opt_find(&rc, opt, NULL, 0,
466 AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)))
467 av_dict_set(&resample_opts, opt, arg, FLAGS);
468 #endif
469 #if CONFIG_SWSCALE
470 else if ((o = av_opt_find(&sc, opt, NULL, 0,
471 AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
472 // XXX we only support sws_flags, not arbitrary sws options
473 int ret = av_opt_set(sws_opts, opt, arg, 0);
474 if (ret < 0) {
475 av_log(NULL, AV_LOG_ERROR, "Error setting option %s.\n", opt);
476 return ret;
477 }
478 }
479 #endif
480
481 if (o)
482 return 0;
483 return AVERROR_OPTION_NOT_FOUND;
484 }
485
486 /*
487 * Check whether given option is a group separator.
488 *
489 * @return index of the group definition that matched or -1 if none
490 */
491 static int match_group_separator(const OptionGroupDef *groups, int nb_groups,
492 const char *opt)
493 {
494 int i;
495
496 for (i = 0; i < nb_groups; i++) {
497 const OptionGroupDef *p = &groups[i];
498 if (p->sep && !strcmp(p->sep, opt))
499 return i;
500 }
501
502 return -1;
503 }
504
505 /*
506 * Finish parsing an option group.
507 *
508 * @param group_idx which group definition should this group belong to
509 * @param arg argument of the group delimiting option
510 */
511 static void finish_group(OptionParseContext *octx, int group_idx,
512 const char *arg)
513 {
514 OptionGroupList *l = &octx->groups[group_idx];
515 OptionGroup *g;
516
517 GROW_ARRAY(l->groups, l->nb_groups);
518 g = &l->groups[l->nb_groups - 1];
519
520 *g = octx->cur_group;
521 g->arg = arg;
522 g->group_def = l->group_def;
523 #if CONFIG_SWSCALE
524 g->sws_opts = sws_opts;
525 #endif
526 g->codec_opts = codec_opts;
527 g->format_opts = format_opts;
528 g->resample_opts = resample_opts;
529
530 codec_opts = NULL;
531 format_opts = NULL;
532 resample_opts = NULL;
533 #if CONFIG_SWSCALE
534 sws_opts = NULL;
535 #endif
536 init_opts();
537
538 memset(&octx->cur_group, 0, sizeof(octx->cur_group));
539 }
540
541 /*
542 * Add an option instance to currently parsed group.
543 */
544 static void add_opt(OptionParseContext *octx, const OptionDef *opt,
545 const char *key, const char *val)
546 {
547 int global = !(opt->flags & (OPT_PERFILE | OPT_SPEC | OPT_OFFSET));
548 OptionGroup *g = global ? &octx->global_opts : &octx->cur_group;
549
550 GROW_ARRAY(g->opts, g->nb_opts);
551 g->opts[g->nb_opts - 1].opt = opt;
552 g->opts[g->nb_opts - 1].key = key;
553 g->opts[g->nb_opts - 1].val = val;
554 }
555
556 static void init_parse_context(OptionParseContext *octx,
557 const OptionGroupDef *groups, int nb_groups)
558 {
559 static const OptionGroupDef global_group = { "global" };
560 int i;
561
562 memset(octx, 0, sizeof(*octx));
563
564 octx->nb_groups = nb_groups;
565 octx->groups = av_mallocz(sizeof(*octx->groups) * octx->nb_groups);
566 if (!octx->groups)
567 exit_program(1);
568
569 for (i = 0; i < octx->nb_groups; i++)
570 octx->groups[i].group_def = &groups[i];
571
572 octx->global_opts.group_def = &global_group;
573 octx->global_opts.arg = "";
574
575 init_opts();
576 }
577
578 void uninit_parse_context(OptionParseContext *octx)
579 {
580 int i, j;
581
582 for (i = 0; i < octx->nb_groups; i++) {
583 OptionGroupList *l = &octx->groups[i];
584
585 for (j = 0; j < l->nb_groups; j++) {
586 av_freep(&l->groups[j].opts);
587 av_dict_free(&l->groups[j].codec_opts);
588 av_dict_free(&l->groups[j].format_opts);
589 av_dict_free(&l->groups[j].resample_opts);
590 #if CONFIG_SWSCALE
591 sws_freeContext(l->groups[j].sws_opts);
592 #endif
593 }
594 av_freep(&l->groups);
595 }
596 av_freep(&octx->groups);
597
598 av_freep(&octx->cur_group.opts);
599 av_freep(&octx->global_opts.opts);
600
601 uninit_opts();
602 }
603
604 int split_commandline(OptionParseContext *octx, int argc, char *argv[],
605 const OptionDef *options,
606 const OptionGroupDef *groups, int nb_groups)
607 {
608 int optindex = 1;
609
610 /* perform system-dependent conversions for arguments list */
611 prepare_app_arguments(&argc, &argv);
612
613 init_parse_context(octx, groups, nb_groups);
614 av_log(NULL, AV_LOG_DEBUG, "Splitting the commandline.\n");
615
616 while (optindex < argc) {
617 const char *opt = argv[optindex++], *arg;
618 const OptionDef *po;
619 int ret;
620
621 av_log(NULL, AV_LOG_DEBUG, "Reading option '%s' ...", opt);
622
623 /* unnamed group separators, e.g. output filename */
624 if (opt[0] != '-' || !opt[1]) {
625 finish_group(octx, 0, opt);
626 av_log(NULL, AV_LOG_DEBUG, " matched as %s.\n", groups[0].name);
627 continue;
628 }
629 opt++;
630
631 #define GET_ARG(arg) \
632 do { \
633 arg = argv[optindex++]; \
634 if (!arg) { \
635 av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'.\n", opt);\
636 return AVERROR(EINVAL); \
637 } \
638 } while (0)
639
640 /* named group separators, e.g. -i */
641 if ((ret = match_group_separator(groups, nb_groups, opt)) >= 0) {
642 GET_ARG(arg);
643 finish_group(octx, ret, arg);
644 av_log(NULL, AV_LOG_DEBUG, " matched as %s with argument '%s'.\n",
645 groups[ret].name, arg);
646 continue;
647 }
648
649 /* normal options */
650 po = find_option(options, opt);
651 if (po->name) {
652 if (po->flags & OPT_EXIT) {
653 /* optional argument, e.g. -h */
654 arg = argv[optindex++];
655 } else if (po->flags & HAS_ARG) {
656 GET_ARG(arg);
657 } else {
658 arg = "1";
659 }
660
661 add_opt(octx, po, opt, arg);
662 av_log(NULL, AV_LOG_DEBUG, " matched as option '%s' (%s) with "
663 "argument '%s'.\n", po->name, po->help, arg);
664 continue;
665 }
666
667 /* AVOptions */
668 if (argv[optindex]) {
669 ret = opt_default(NULL, opt, argv[optindex]);
670 if (ret >= 0) {
671 av_log(NULL, AV_LOG_DEBUG, " matched as AVOption '%s' with "
672 "argument '%s'.\n", opt, argv[optindex]);
673 optindex++;
674 continue;
675 } else if (ret != AVERROR_OPTION_NOT_FOUND) {
676 av_log(NULL, AV_LOG_ERROR, "Error parsing option '%s' "
677 "with argument '%s'.\n", opt, argv[optindex]);
678 return ret;
679 }
680 }
681
682 /* boolean -nofoo options */
683 if (opt[0] == 'n' && opt[1] == 'o' &&
684 (po = find_option(options, opt + 2)) &&
685 po->name && po->flags & OPT_BOOL) {
686 add_opt(octx, po, opt, "0");
687 av_log(NULL, AV_LOG_DEBUG, " matched as option '%s' (%s) with "
688 "argument 0.\n", po->name, po->help);
689 continue;
690 }
691
692 av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'.\n", opt);
693 return AVERROR_OPTION_NOT_FOUND;
694 }
695
696 if (octx->cur_group.nb_opts || codec_opts || format_opts || resample_opts)
697 av_log(NULL, AV_LOG_WARNING, "Trailing options were found on the "
698 "commandline.\n");
699
700 av_log(NULL, AV_LOG_DEBUG, "Finished splitting the commandline.\n");
701
702 return 0;
703 }
704
705 int opt_cpuflags(void *optctx, const char *opt, const char *arg)
706 {
707 int flags = av_parse_cpu_flags(arg);
708
709 if (flags < 0)
710 return flags;
711
712 av_set_cpu_flags_mask(flags);
713 return 0;
714 }
715
716 int opt_loglevel(void *optctx, const char *opt, const char *arg)
717 {
718 const struct { const char *name; int level; } log_levels[] = {
719 { "quiet" , AV_LOG_QUIET },
720 { "panic" , AV_LOG_PANIC },
721 { "fatal" , AV_LOG_FATAL },
722 { "error" , AV_LOG_ERROR },
723 { "warning", AV_LOG_WARNING },
724 { "info" , AV_LOG_INFO },
725 { "verbose", AV_LOG_VERBOSE },
726 { "debug" , AV_LOG_DEBUG },
727 { "trace" , AV_LOG_TRACE },
728 };
729 char *tail;
730 int level;
731 int i;
732
733 for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++) {
734 if (!strcmp(log_levels[i].name, arg)) {
735 av_log_set_level(log_levels[i].level);
736 return 0;
737 }
738 }
739
740 level = strtol(arg, &tail, 10);
741 if (*tail) {
742 av_log(NULL, AV_LOG_FATAL, "Invalid loglevel \"%s\". "
743 "Possible levels are numbers or:\n", arg);
744 for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++)
745 av_log(NULL, AV_LOG_FATAL, "\"%s\"\n", log_levels[i].name);
746 exit_program(1);
747 }
748 av_log_set_level(level);
749 return 0;
750 }
751
752 int opt_timelimit(void *optctx, const char *opt, const char *arg)
753 {
754 #if HAVE_SETRLIMIT
755 int lim = parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
756 struct rlimit rl = { lim, lim + 1 };
757 if (setrlimit(RLIMIT_CPU, &rl))
758 perror("setrlimit");
759 #else
760 av_log(NULL, AV_LOG_WARNING, "-%s not implemented on this OS\n", opt);
761 #endif
762 return 0;
763 }
764
765 void print_error(const char *filename, int err)
766 {
767 char errbuf[128];
768 const char *errbuf_ptr = errbuf;
769
770 if (av_strerror(err, errbuf, sizeof(errbuf)) < 0)
771 errbuf_ptr = strerror(AVUNERROR(err));
772 av_log(NULL, AV_LOG_ERROR, "%s: %s\n", filename, errbuf_ptr);
773 }
774
775 static int warned_cfg = 0;
776
777 #define INDENT 1
778 #define SHOW_VERSION 2
779 #define SHOW_CONFIG 4
780
781 #define PRINT_LIB_INFO(libname, LIBNAME, flags, level) \
782 if (CONFIG_##LIBNAME) { \
783 const char *indent = flags & INDENT? " " : ""; \
784 if (flags & SHOW_VERSION) { \
785 unsigned int version = libname##_version(); \
786 av_log(NULL, level, \
787 "%slib%-10s %2d.%3d.%2d / %2d.%3d.%2d\n", \
788 indent, #libname, \
789 LIB##LIBNAME##_VERSION_MAJOR, \
790 LIB##LIBNAME##_VERSION_MINOR, \
791 LIB##LIBNAME##_VERSION_MICRO, \
792 version >> 16, version >> 8 & 0xff, version & 0xff); \
793 } \
794 if (flags & SHOW_CONFIG) { \
795 const char *cfg = libname##_configuration(); \
796 if (strcmp(LIBAV_CONFIGURATION, cfg)) { \
797 if (!warned_cfg) { \
798 av_log(NULL, level, \
799 "%sWARNING: library configuration mismatch\n", \
800 indent); \
801 warned_cfg = 1; \
802 } \
803 av_log(NULL, level, "%s%-11s configuration: %s\n", \
804 indent, #libname, cfg); \
805 } \
806 } \
807 } \
808
809 static void print_all_libs_info(int flags, int level)
810 {
811 PRINT_LIB_INFO(avutil, AVUTIL, flags, level);
812 PRINT_LIB_INFO(avcodec, AVCODEC, flags, level);
813 PRINT_LIB_INFO(avformat, AVFORMAT, flags, level);
814 PRINT_LIB_INFO(avdevice, AVDEVICE, flags, level);
815 PRINT_LIB_INFO(avfilter, AVFILTER, flags, level);
816 PRINT_LIB_INFO(avresample, AVRESAMPLE, flags, level);
817 PRINT_LIB_INFO(swscale, SWSCALE, flags, level);
818 }
819
820 void show_banner(void)
821 {
822 av_log(NULL, AV_LOG_INFO,
823 "%s version " LIBAV_VERSION ", Copyright (c) %d-%d the Libav developers\n",
824 program_name, program_birth_year, this_year);
825 av_log(NULL, AV_LOG_INFO, " built on %s %s with %s\n",
826 __DATE__, __TIME__, CC_IDENT);
827 av_log(NULL, AV_LOG_VERBOSE, " configuration: " LIBAV_CONFIGURATION "\n");
828 print_all_libs_info(INDENT|SHOW_CONFIG, AV_LOG_VERBOSE);
829 print_all_libs_info(INDENT|SHOW_VERSION, AV_LOG_VERBOSE);
830 }
831
832 int show_version(void *optctx, const char *opt, const char *arg)
833 {
834 av_log_set_callback(log_callback_help);
835 printf("%s " LIBAV_VERSION "\n", program_name);
836 print_all_libs_info(SHOW_VERSION, AV_LOG_INFO);
837
838 return 0;
839 }
840
841 int show_license(void *optctx, const char *opt, const char *arg)
842 {
843 printf(
844 #if CONFIG_NONFREE
845 "This version of %s has nonfree parts compiled in.\n"
846 "Therefore it is not legally redistributable.\n",
847 program_name
848 #elif CONFIG_GPLV3
849 "%s is free software; you can redistribute it and/or modify\n"
850 "it under the terms of the GNU General Public License as published by\n"
851 "the Free Software Foundation; either version 3 of the License, or\n"
852 "(at your option) any later version.\n"
853 "\n"
854 "%s is distributed in the hope that it will be useful,\n"
855 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
856 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
857 "GNU General Public License for more details.\n"
858 "\n"
859 "You should have received a copy of the GNU General Public License\n"
860 "along with %s. If not, see <http://www.gnu.org/licenses/>.\n",
861 program_name, program_name, program_name
862 #elif CONFIG_GPL
863 "%s is free software; you can redistribute it and/or modify\n"
864 "it under the terms of the GNU General Public License as published by\n"
865 "the Free Software Foundation; either version 2 of the License, or\n"
866 "(at your option) any later version.\n"
867 "\n"
868 "%s is distributed in the hope that it will be useful,\n"
869 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
870 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
871 "GNU General Public License for more details.\n"
872 "\n"
873 "You should have received a copy of the GNU General Public License\n"
874 "along with %s; if not, write to the Free Software\n"
875 "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
876 program_name, program_name, program_name
877 #elif CONFIG_LGPLV3
878 "%s is free software; you can redistribute it and/or modify\n"
879 "it under the terms of the GNU Lesser General Public License as published by\n"
880 "the Free Software Foundation; either version 3 of the License, or\n"
881 "(at your option) any later version.\n"
882 "\n"
883 "%s is distributed in the hope that it will be useful,\n"
884 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
885 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
886 "GNU Lesser General Public License for more details.\n"
887 "\n"
888 "You should have received a copy of the GNU Lesser General Public License\n"
889 "along with %s. If not, see <http://www.gnu.org/licenses/>.\n",
890 program_name, program_name, program_name
891 #else
892 "%s is free software; you can redistribute it and/or\n"
893 "modify it under the terms of the GNU Lesser General Public\n"
894 "License as published by the Free Software Foundation; either\n"
895 "version 2.1 of the License, or (at your option) any later version.\n"
896 "\n"
897 "%s is distributed in the hope that it will be useful,\n"
898 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
899 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\n"
900 "Lesser General Public License for more details.\n"
901 "\n"
902 "You should have received a copy of the GNU Lesser General Public\n"
903 "License along with %s; if not, write to the Free Software\n"
904 "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
905 program_name, program_name, program_name
906 #endif
907 );
908
909 return 0;
910 }
911
912 int show_formats(void *optctx, const char *opt, const char *arg)
913 {
914 AVInputFormat *ifmt = NULL;
915 AVOutputFormat *ofmt = NULL;
916 const char *last_name;
917
918 printf("File formats:\n"
919 " D. = Demuxing supported\n"
920 " .E = Muxing supported\n"
921 " --\n");
922 last_name = "000";
923 for (;;) {
924 int decode = 0;
925 int encode = 0;
926 const char *name = NULL;
927 const char *long_name = NULL;
928
929 while ((ofmt = av_oformat_next(ofmt))) {
930 if ((!name || strcmp(ofmt->name, name) < 0) &&
931 strcmp(ofmt->name, last_name) > 0) {
932 name = ofmt->name;
933 long_name = ofmt->long_name;
934 encode = 1;
935 }
936 }
937 while ((ifmt = av_iformat_next(ifmt))) {
938 if ((!name || strcmp(ifmt->name, name) < 0) &&
939 strcmp(ifmt->name, last_name) > 0) {
940 name = ifmt->name;
941 long_name = ifmt->long_name;
942 encode = 0;
943 }
944 if (name && strcmp(ifmt->name, name) == 0)
945 decode = 1;
946 }
947 if (!name)
948 break;
949 last_name = name;
950
951 printf(" %s%s %-15s %s\n",
952 decode ? "D" : " ",
953 encode ? "E" : " ",
954 name,
955 long_name ? long_name:" ");
956 }
957 return 0;
958 }
959
960 #define PRINT_CODEC_SUPPORTED(codec, field, type, list_name, term, get_name) \
961 if (codec->field) { \
962 const type *p = c->field; \
963 \
964 printf(" Supported " list_name ":"); \
965 while (*p != term) { \
966 get_name(*p); \
967 printf(" %s", name); \
968 p++; \
969 } \
970 printf("\n"); \
971 } \
972
973 static void print_codec(const AVCodec *c)
974 {
975 int encoder = av_codec_is_encoder(c);
976
977 printf("%s %s [%s]:\n", encoder ? "Encoder" : "Decoder", c->name,
978 c->long_name ? c->long_name : "");
979
980 printf(" General capabilities: ");
981 if (c->capabilities & AV_CODEC_CAP_DRAW_HORIZ_BAND)
982 printf("horizband ");
983 if (c->capabilities & AV_CODEC_CAP_DR1)
984 printf("dr1 ");
985 if (c->capabilities & AV_CODEC_CAP_TRUNCATED)
986 printf("trunc ");
987 if (c->capabilities & AV_CODEC_CAP_DELAY)
988 printf("delay ");
989 if (c->capabilities & AV_CODEC_CAP_SMALL_LAST_FRAME)
990 printf("small ");
991 if (c->capabilities & AV_CODEC_CAP_SUBFRAMES)
992 printf("subframes ");
993 if (c->capabilities & AV_CODEC_CAP_EXPERIMENTAL)
994 printf("exp ");
995 if (c->capabilities & AV_CODEC_CAP_CHANNEL_CONF)
996 printf("chconf ");
997 if (c->capabilities & AV_CODEC_CAP_PARAM_CHANGE)
998 printf("paramchange ");
999 if (c->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE)
1000 printf("variable ");
1001 if (c->capabilities & (AV_CODEC_CAP_FRAME_THREADS |
1002 AV_CODEC_CAP_SLICE_THREADS |
1003 AV_CODEC_CAP_AUTO_THREADS))
1004 printf("threads ");
1005 if (!c->capabilities)
1006 printf("none");
1007 printf("\n");
1008
1009 if (c->type == AVMEDIA_TYPE_VIDEO) {
1010 printf(" Threading capabilities: ");
1011 switch (c->capabilities & (AV_CODEC_CAP_FRAME_THREADS |
1012 AV_CODEC_CAP_SLICE_THREADS |
1013 AV_CODEC_CAP_AUTO_THREADS)) {
1014 case AV_CODEC_CAP_FRAME_THREADS |
1015 AV_CODEC_CAP_SLICE_THREADS: printf("frame and slice"); break;
1016 case AV_CODEC_CAP_FRAME_THREADS: printf("frame"); break;
1017 case AV_CODEC_CAP_SLICE_THREADS: printf("slice"); break;
1018 case AV_CODEC_CAP_AUTO_THREADS : printf("auto"); break;
1019 default: printf("none"); break;
1020 }
1021 printf("\n");
1022 }
1023
1024 if (c->supported_framerates) {
1025 const AVRational *fps = c->supported_framerates;
1026
1027 printf(" Supported framerates:");
1028 while (fps->num) {
1029 printf(" %d/%d", fps->num, fps->den);
1030 fps++;
1031 }
1032 printf("\n");
1033 }
1034 PRINT_CODEC_SUPPORTED(c, pix_fmts, enum AVPixelFormat, "pixel formats",
1035 AV_PIX_FMT_NONE, GET_PIX_FMT_NAME);
1036 PRINT_CODEC_SUPPORTED(c, supported_samplerates, int, "sample rates", 0,
1037 GET_SAMPLE_RATE_NAME);
1038 PRINT_CODEC_SUPPORTED(c, sample_fmts, enum AVSampleFormat, "sample formats",
1039 AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME);
1040 PRINT_CODEC_SUPPORTED(c, channel_layouts, uint64_t, "channel layouts",
1041 0, GET_CH_LAYOUT_DESC);
1042
1043 if (c->priv_class) {
1044 show_help_children(c->priv_class,
1045 AV_OPT_FLAG_ENCODING_PARAM |
1046 AV_OPT_FLAG_DECODING_PARAM);
1047 }
1048 }
1049
1050 static char get_media_type_char(enum AVMediaType type)
1051 {
1052 switch (type) {
1053 case AVMEDIA_TYPE_VIDEO: return 'V';
1054 case AVMEDIA_TYPE_AUDIO: return 'A';
1055 case AVMEDIA_TYPE_SUBTITLE: return 'S';
1056 default: return '?';
1057 }
1058 }
1059
1060 static const AVCodec *next_codec_for_id(enum AVCodecID id, const AVCodec *prev,
1061 int encoder)
1062 {
1063 while ((prev = av_codec_next(prev))) {
1064 if (prev->id == id &&
1065 (encoder ? av_codec_is_encoder(prev) : av_codec_is_decoder(prev)))
1066 return prev;
1067 }
1068 return NULL;
1069 }
1070
1071 static void print_codecs_for_id(enum AVCodecID id, int encoder)
1072 {
1073 const AVCodec *codec = NULL;
1074
1075 printf(" (%s: ", encoder ? "encoders" : "decoders");
1076
1077 while ((codec = next_codec_for_id(id, codec, encoder)))
1078 printf("%s ", codec->name);
1079
1080 printf(")");
1081 }
1082
1083 int show_codecs(void *optctx, const char *opt, const char *arg)
1084 {
1085 const AVCodecDescriptor *desc = NULL;
1086
1087 printf("Codecs:\n"
1088 " D..... = Decoding supported\n"
1089 " .E.... = Encoding supported\n"
1090 " ..V... = Video codec\n"
1091 " ..A... = Audio codec\n"
1092 " ..S... = Subtitle codec\n"
1093 " ...I.. = Intra frame-only codec\n"
1094 " ....L. = Lossy compression\n"
1095 " .....S = Lossless compression\n"
1096 " -------\n");
1097 while ((desc = avcodec_descriptor_next(desc))) {
1098 const AVCodec *codec = NULL;
1099
1100 printf(avcodec_find_decoder(desc->id) ? "D" : ".");
1101 printf(avcodec_find_encoder(desc->id) ? "E" : ".");
1102
1103 printf("%c", get_media_type_char(desc->type));
1104 printf((desc->props & AV_CODEC_PROP_INTRA_ONLY) ? "I" : ".");
1105 printf((desc->props & AV_CODEC_PROP_LOSSY) ? "L" : ".");
1106 printf((desc->props & AV_CODEC_PROP_LOSSLESS) ? "S" : ".");
1107
1108 printf(" %-20s %s", desc->name, desc->long_name ? desc->long_name : "");
1109
1110 /* print decoders/encoders when there's more than one or their
1111 * names are different from codec name */
1112 while ((codec = next_codec_for_id(desc->id, codec, 0))) {
1113 if (strcmp(codec->name, desc->name)) {
1114 print_codecs_for_id(desc->id, 0);
1115 break;
1116 }
1117 }
1118 codec = NULL;
1119 while ((codec = next_codec_for_id(desc->id, codec, 1))) {
1120 if (strcmp(codec->name, desc->name)) {
1121 print_codecs_for_id(desc->id, 1);
1122 break;
1123 }
1124 }
1125
1126 printf("\n");
1127 }
1128 return 0;
1129 }
1130
1131 static void print_codecs(int encoder)
1132 {
1133 const AVCodecDescriptor *desc = NULL;
1134
1135 printf("%s:\n"
1136 " V... = Video\n"
1137 " A... = Audio\n"
1138 " S... = Subtitle\n"
1139 " .F.. = Frame-level multithreading\n"
1140 " ..S. = Slice-level multithreading\n"
1141 " ...X = Codec is experimental\n"
1142 " ---\n",
1143 encoder ? "Encoders" : "Decoders");
1144 while ((desc = avcodec_descriptor_next(desc))) {
1145 const AVCodec *codec = NULL;
1146
1147 while ((codec = next_codec_for_id(desc->id, codec, encoder))) {
1148 printf("%c", get_media_type_char(desc->type));
1149 printf((codec->capabilities & AV_CODEC_CAP_FRAME_THREADS) ? "F" : ".");
1150 printf((codec->capabilities & AV_CODEC_CAP_SLICE_THREADS) ? "S" : ".");
1151 printf((codec->capabilities & AV_CODEC_CAP_EXPERIMENTAL) ? "X" : ".");
1152
1153 printf(" %-20s %s", codec->name, codec->long_name ? codec->long_name : "");
1154 if (strcmp(codec->name, desc->name))
1155 printf(" (codec %s)", desc->name);
1156
1157 printf("\n");
1158 }
1159 }
1160 }
1161
1162 int show_decoders(void *optctx, const char *opt, const char *arg)
1163 {
1164 print_codecs(0);
1165 return 0;
1166 }
1167
1168 int show_encoders(void *optctx, const char *opt, const char *arg)
1169 {
1170 print_codecs(1);
1171 return 0;
1172 }
1173
1174 int show_bsfs(void *optctx, const char *opt, const char *arg)
1175 {
1176 const AVBitStreamFilter *bsf = NULL;
1177 void *opaque = NULL;
1178
1179 printf("Bitstream filters:\n");
1180 while ((bsf = av_bsf_next(&opaque)))
1181 printf("%s\n", bsf->name);
1182 printf("\n");
1183 return 0;
1184 }
1185
1186 int show_protocols(void *optctx, const char *opt, const char *arg)
1187 {
1188 void *opaque = NULL;
1189 const char *name;
1190
1191 printf("Supported file protocols:\n"
1192 "Input:\n");
1193 while ((name = avio_enum_protocols(&opaque, 0)))
1194 printf("%s\n", name);
1195 printf("Output:\n");
1196 while ((name = avio_enum_protocols(&opaque, 1)))
1197 printf("%s\n", name);
1198 return 0;
1199 }
1200
1201 int show_filters(void *optctx, const char *opt, const char *arg)
1202 {
1203 #if CONFIG_AVFILTER
1204 const AVFilter *filter = NULL;
1205
1206 printf("Filters:\n");
1207 while ((filter = avfilter_next(filter)))
1208 printf("%-16s %s\n", filter->name, filter->description);
1209 #else
1210 printf("No filters available: libavfilter disabled\n");
1211 #endif
1212 return 0;
1213 }
1214
1215 int show_pix_fmts(void *optctx, const char *opt, const char *arg)
1216 {
1217 const AVPixFmtDescriptor *pix_desc = NULL;
1218
1219 printf("Pixel formats:\n"
1220 "I.... = Supported Input format for conversion\n"
1221 ".O... = Supported Output format for conversion\n"
1222 "..H.. = Hardware accelerated format\n"
1223 "...P. = Paletted format\n"
1224 "....B = Bitstream format\n"
1225 "FLAGS NAME NB_COMPONENTS BITS_PER_PIXEL\n"
1226 "-----\n");
1227
1228 #if !CONFIG_SWSCALE
1229 # define sws_isSupportedInput(x) 0
1230 # define sws_isSupportedOutput(x) 0
1231 #endif
1232
1233 while ((pix_desc = av_pix_fmt_desc_next(pix_desc))) {
1234 enum AVPixelFormat pix_fmt = av_pix_fmt_desc_get_id(pix_desc);
1235 printf("%c%c%c%c%c %-16s %d %2d\n",
1236 sws_isSupportedInput (pix_fmt) ? 'I' : '.',
1237 sws_isSupportedOutput(pix_fmt) ? 'O' : '.',
1238 pix_desc->flags & AV_PIX_FMT_FLAG_HWACCEL ? 'H' : '.',
1239 pix_desc->flags & AV_PIX_FMT_FLAG_PAL ? 'P' : '.',
1240 pix_desc->flags & AV_PIX_FMT_FLAG_BITSTREAM ? 'B' : '.',
1241 pix_desc->name,
1242 pix_desc->nb_components,
1243 av_get_bits_per_pixel(pix_desc));
1244 }
1245 return 0;
1246 }
1247
1248 int show_sample_fmts(void *optctx, const char *opt, const char *arg)
1249 {
1250 int i;
1251 char fmt_str[128];
1252 for (i = -1; i < AV_SAMPLE_FMT_NB; i++)
1253 printf("%s\n", av_get_sample_fmt_string(fmt_str, sizeof(fmt_str), i));
1254 return 0;
1255 }
1256
1257 static void show_help_codec(const char *name, int encoder)
1258 {
1259 const AVCodecDescriptor *desc;
1260 const AVCodec *codec;
1261
1262 if (!name) {
1263 av_log(NULL, AV_LOG_ERROR, "No codec name specified.\n");
1264 return;
1265 }
1266
1267 codec = encoder ? avcodec_find_encoder_by_name(name) :
1268 avcodec_find_decoder_by_name(name);
1269
1270 if (codec)
1271 print_codec(codec);
1272 else if ((desc = avcodec_descriptor_get_by_name(name))) {
1273 int printed = 0;
1274
1275 while ((codec = next_codec_for_id(desc->id, codec, encoder))) {
1276 printed = 1;
1277 print_codec(codec);
1278 }
1279
1280 if (!printed) {
1281 av_log(NULL, AV_LOG_ERROR, "Codec '%s' is known to Libav, "
1282 "but no %s for it are available. Libav might need to be "
1283 "recompiled with additional external libraries.\n",
1284 name, encoder ? "encoders" : "decoders");
1285 }
1286 } else {
1287 av_log(NULL, AV_LOG_ERROR, "Codec '%s' is not recognized by Libav.\n",
1288 name);
1289 }
1290 }
1291
1292 static void show_help_demuxer(const char *name)
1293 {
1294 const AVInputFormat *fmt = av_find_input_format(name);
1295
1296 if (!fmt) {
1297 av_log(NULL, AV_LOG_ERROR, "Unknown format '%s'.\n", name);
1298 return;
1299 }
1300
1301 printf("Demuxer %s [%s]:\n", fmt->name, fmt->long_name);
1302
1303 if (fmt->extensions)
1304 printf(" Common extensions: %s.\n", fmt->extensions);
1305
1306 if (fmt->priv_class)
1307 show_help_children(fmt->priv_class, AV_OPT_FLAG_DECODING_PARAM);
1308 }
1309
1310 static void show_help_muxer(const char *name)
1311 {
1312 const AVCodecDescriptor *desc;
1313 const AVOutputFormat *fmt = av_guess_format(name, NULL, NULL);
1314
1315 if (!fmt) {
1316 av_log(NULL, AV_LOG_ERROR, "Unknown format '%s'.\n", name);
1317 return;
1318 }
1319
1320 printf("Muxer %s [%s]:\n", fmt->name, fmt->long_name);
1321
1322 if (fmt->extensions)
1323 printf(" Common extensions: %s.\n", fmt->extensions);
1324 if (fmt->mime_type)
1325 printf(" Mime type: %s.\n", fmt->mime_type);
1326 if (fmt->video_codec != AV_CODEC_ID_NONE &&
1327 (desc = avcodec_descriptor_get(fmt->video_codec))) {
1328 printf(" Default video codec: %s.\n", desc->name);
1329 }
1330 if (fmt->audio_codec != AV_CODEC_ID_NONE &&
1331 (desc = avcodec_descriptor_get(fmt->audio_codec))) {
1332 printf(" Default audio codec: %s.\n", desc->name);
1333 }
1334 if (fmt->subtitle_codec != AV_CODEC_ID_NONE &&
1335 (desc = avcodec_descriptor_get(fmt->subtitle_codec))) {
1336 printf(" Default subtitle codec: %s.\n", desc->name);
1337 }
1338
1339 if (fmt->priv_class)
1340 show_help_children(fmt->priv_class, AV_OPT_FLAG_ENCODING_PARAM);
1341 }
1342
1343 #if CONFIG_AVFILTER
1344 static void show_help_filter(const char *name)
1345 {
1346 const AVFilter *f = avfilter_get_by_name(name);
1347 int i, count;
1348
1349 if (!name) {
1350 av_log(NULL, AV_LOG_ERROR, "No filter name specified.\n");
1351 return;
1352 } else if (!f) {
1353 av_log(NULL, AV_LOG_ERROR, "Unknown filter '%s'.\n", name);
1354 return;
1355 }
1356
1357 printf("Filter %s [%s]:\n", f->name, f->description);
1358
1359 if (f->flags & AVFILTER_FLAG_SLICE_THREADS)
1360 printf(" slice threading supported\n");
1361
1362 printf(" Inputs:\n");
1363 count = avfilter_pad_count(f->inputs);
1364 for (i = 0; i < count; i++) {
1365 printf(" %d %s (%s)\n", i, avfilter_pad_get_name(f->inputs, i),
1366 media_type_string(avfilter_pad_get_type(f->inputs, i)));
1367 }
1368 if (f->flags & AVFILTER_FLAG_DYNAMIC_INPUTS)
1369 printf(" dynamic (depending on the options)\n");
1370
1371 printf(" Outputs:\n");
1372 count = avfilter_pad_count(f->outputs);
1373 for (i = 0; i < count; i++) {
1374 printf(" %d %s (%s)\n", i, avfilter_pad_get_name(f->outputs, i),
1375 media_type_string(avfilter_pad_get_type(f->outputs, i)));
1376 }
1377 if (f->flags & AVFILTER_FLAG_DYNAMIC_OUTPUTS)
1378 printf(" dynamic (depending on the options)\n");
1379
1380 if (f->priv_class)
1381 show_help_children(f->priv_class, AV_OPT_FLAG_VIDEO_PARAM |
1382 AV_OPT_FLAG_AUDIO_PARAM);
1383 }
1384 #endif
1385
1386 int show_help(void *optctx, const char *opt, const char *arg)
1387 {
1388 char *topic, *par;
1389 av_log_set_callback(log_callback_help);
1390
1391 topic = av_strdup(arg ? arg : "");
1392 if (!topic)
1393 return AVERROR(ENOMEM);
1394 par = strchr(topic, '=');
1395 if (par)
1396 *par++ = 0;
1397
1398 if (!*topic) {
1399 show_help_default(topic, par);
1400 } else if (!strcmp(topic, "decoder")) {
1401 show_help_codec(par, 0);
1402 } else if (!strcmp(topic, "encoder")) {
1403 show_help_codec(par, 1);
1404 } else if (!strcmp(topic, "demuxer")) {
1405 show_help_demuxer(par);
1406 } else if (!strcmp(topic, "muxer")) {
1407 show_help_muxer(par);
1408 #if CONFIG_AVFILTER
1409 } else if (!strcmp(topic, "filter")) {
1410 show_help_filter(par);
1411 #endif
1412 } else {
1413 show_help_default(topic, par);
1414 }
1415
1416 av_freep(&topic);
1417 return 0;
1418 }
1419
1420 int read_yesno(void)
1421 {
1422 int c = getchar();
1423 int yesno = (av_toupper(c) == 'Y');
1424
1425 while (c != '\n' && c != EOF)
1426 c = getchar();
1427
1428 return yesno;
1429 }
1430
1431 void init_pts_correction(PtsCorrectionContext *ctx)
1432 {
1433 ctx->num_faulty_pts = ctx->num_faulty_dts = 0;
1434 ctx->last_pts = ctx->last_dts = INT64_MIN;
1435 }
1436
1437 int64_t guess_correct_pts(PtsCorrectionContext *ctx, int64_t reordered_pts,
1438 int64_t dts)
1439 {
1440 int64_t pts = AV_NOPTS_VALUE;
1441
1442 if (dts != AV_NOPTS_VALUE) {
1443 ctx->num_faulty_dts += dts <= ctx->last_dts;
1444 ctx->last_dts = dts;
1445 }
1446 if (reordered_pts != AV_NOPTS_VALUE) {
1447 ctx->num_faulty_pts += reordered_pts <= ctx->last_pts;
1448 ctx->last_pts = reordered_pts;
1449 }
1450 if ((ctx->num_faulty_pts<=ctx->num_faulty_dts || dts == AV_NOPTS_VALUE)
1451 && reordered_pts != AV_NOPTS_VALUE)
1452 pts = reordered_pts;
1453 else
1454 pts = dts;
1455
1456 return pts;
1457 }
1458
1459 FILE *get_preset_file(char *filename, size_t filename_size,
1460 const char *preset_name, int is_path,
1461 const char *codec_name)
1462 {
1463 FILE *f = NULL;
1464 int i;
1465 const char *base[3] = { getenv("AVCONV_DATADIR"),
1466 getenv("HOME"),
1467 AVCONV_DATADIR, };
1468
1469 if (is_path) {
1470 av_strlcpy(filename, preset_name, filename_size);
1471 f = fopen(filename, "r");
1472 } else {
1473 for (i = 0; i < 3 && !f; i++) {
1474 if (!base[i])
1475 continue;
1476 snprintf(filename, filename_size, "%s%s/%s.avpreset", base[i],
1477 i != 1 ? "" : "/.avconv", preset_name);
1478 f = fopen(filename, "r");
1479 if (!f && codec_name) {
1480 snprintf(filename, filename_size,
1481 "%s%s/%s-%s.avpreset",
1482 base[i], i != 1 ? "" : "/.avconv", codec_name,
1483 preset_name);
1484 f = fopen(filename, "r");
1485 }
1486 }
1487 }
1488
1489 return f;
1490 }
1491
1492 int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
1493 {
1494 if (*spec <= '9' && *spec >= '0') /* opt:index */
1495 return strtol(spec, NULL, 0) == st->index;
1496 else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
1497 *spec == 't') { /* opt:[vasdt] */
1498 enum AVMediaType type;
1499
1500 switch (*spec++) {
1501 case 'v': type = AVMEDIA_TYPE_VIDEO; break;
1502 case 'a': type = AVMEDIA_TYPE_AUDIO; break;
1503 case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
1504 case 'd': type = AVMEDIA_TYPE_DATA; break;
1505 case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
1506 default: av_assert0(0);
1507 }
1508 if (type != st->codecpar->codec_type)
1509 return 0;
1510 if (*spec++ == ':') { /* possibly followed by :index */
1511 int i, index = strtol(spec, NULL, 0);
1512 for (i = 0; i < s->nb_streams; i++)
1513 if (s->streams[i]->codecpar->codec_type == type && index-- == 0)
1514 return i == st->index;
1515 return 0;
1516 }
1517 return 1;
1518 } else if (*spec == 'p' && *(spec + 1) == ':') {
1519 int prog_id, i, j;
1520 char *endptr;
1521 spec += 2;
1522 prog_id = strtol(spec, &endptr, 0);
1523 for (i = 0; i < s->nb_programs; i++) {
1524 if (s->programs[i]->id != prog_id)
1525 continue;
1526
1527 if (*endptr++ == ':') {
1528 int stream_idx = strtol(endptr, NULL, 0);
1529 return stream_idx >= 0 &&
1530 stream_idx < s->programs[i]->nb_stream_indexes &&
1531 st->index == s->programs[i]->stream_index[stream_idx];
1532 }
1533
1534 for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
1535 if (st->index == s->programs[i]->stream_index[j])
1536 return 1;
1537 }
1538 return 0;
1539 } else if (*spec == 'i' && *(spec + 1) == ':') {
1540 int stream_id;
1541 char *endptr;
1542 spec += 2;
1543 stream_id = strtol(spec, &endptr, 0);
1544 return stream_id == st->id;
1545 } else if (*spec == 'm' && *(spec + 1) == ':') {
1546 AVDictionaryEntry *tag;
1547 char *key, *val;
1548 int ret;
1549
1550 spec += 2;
1551 val = strchr(spec, ':');
1552
1553 key = val ? av_strndup(spec, val - spec) : av_strdup(spec);
1554 if (!key)
1555 return AVERROR(ENOMEM);
1556
1557 tag = av_dict_get(st->metadata, key, NULL, 0);
1558 if (tag) {
1559 if (!val || !strcmp(tag->value, val + 1))
1560 ret = 1;
1561 else
1562 ret = 0;
1563 } else
1564 ret = 0;
1565
1566 av_freep(&key);
1567 return ret;
1568 } else if (*spec == 'u') {
1569 AVCodecParameters *par = st->codecpar;
1570 int val;
1571 switch (par->codec_type) {
1572 case AVMEDIA_TYPE_AUDIO:
1573 val = par->sample_rate && par->channels;
1574 if (par->format == AV_SAMPLE_FMT_NONE)
1575 return 0;
1576 break;
1577 case AVMEDIA_TYPE_VIDEO:
1578 val = par->width && par->height;
1579 if (par->format == AV_PIX_FMT_NONE)
1580 return 0;
1581 break;
1582 case AVMEDIA_TYPE_UNKNOWN:
1583 val = 0;
1584 break;
1585 default:
1586 val = 1;
1587 break;
1588 }
1589 return par->codec_id != AV_CODEC_ID_NONE && val != 0;
1590 } else if (!*spec) /* empty specifier, matches everything */
1591 return 1;
1592
1593 av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
1594 return AVERROR(EINVAL);
1595 }
1596
1597 AVDictionary *filter_codec_opts(AVDictionary *opts, enum AVCodecID codec_id,
1598 AVFormatContext *s, AVStream *st, AVCodec *codec)
1599 {
1600 AVDictionary *ret = NULL;
1601 AVDictionaryEntry *t = NULL;
1602 int flags = s->oformat ? AV_OPT_FLAG_ENCODING_PARAM
1603 : AV_OPT_FLAG_DECODING_PARAM;
1604 char prefix = 0;
1605 const AVClass *cc = avcodec_get_class();
1606
1607 if (!codec)
1608 codec = s->oformat ? avcodec_find_encoder(codec_id)
1609 : avcodec_find_decoder(codec_id);
1610
1611 switch (st->codecpar->codec_type) {
1612 case AVMEDIA_TYPE_VIDEO:
1613 prefix = 'v';
1614 flags |= AV_OPT_FLAG_VIDEO_PARAM;
1615 break;
1616 case AVMEDIA_TYPE_AUDIO:
1617 prefix = 'a';
1618 flags |= AV_OPT_FLAG_AUDIO_PARAM;
1619 break;
1620 case AVMEDIA_TYPE_SUBTITLE:
1621 prefix = 's';
1622 flags |= AV_OPT_FLAG_SUBTITLE_PARAM;
1623 break;
1624 }
1625
1626 while (t = av_dict_get(opts, "", t, AV_DICT_IGNORE_SUFFIX)) {
1627 char *p = strchr(t->key, ':');
1628
1629 /* check stream specification in opt name */
1630 if (p)
1631 switch (check_stream_specifier(s, st, p + 1)) {
1632 case 1: *p = 0; break;
1633 case 0: continue;
1634 default: return NULL;
1635 }
1636
1637 if (av_opt_find(&cc, t->key, NULL, flags, AV_OPT_SEARCH_FAKE_OBJ) ||
1638 (codec && codec->priv_class &&
1639 av_opt_find(&codec->priv_class, t->key, NULL, flags,
1640 AV_OPT_SEARCH_FAKE_OBJ)))
1641 av_dict_set(&ret, t->key, t->value, 0);
1642 else if (t->key[0] == prefix &&
1643 av_opt_find(&cc, t->key + 1, NULL, flags,
1644 AV_OPT_SEARCH_FAKE_OBJ))
1645 av_dict_set(&ret, t->key + 1, t->value, 0);
1646
1647 if (p)
1648 *p = ':';
1649 }
1650 return ret;
1651 }
1652
1653 AVDictionary **setup_find_stream_info_opts(AVFormatContext *s,
1654 AVDictionary *codec_opts)
1655 {
1656 int i;
1657 AVDictionary **opts;
1658
1659 if (!s->nb_streams)
1660 return NULL;
1661 opts = av_mallocz(s->nb_streams * sizeof(*opts));
1662 if (!opts) {
1663 av_log(NULL, AV_LOG_ERROR,
1664 "Could not alloc memory for stream options.\n");
1665 return NULL;
1666 }
1667 for (i = 0; i < s->nb_streams; i++)
1668 opts[i] = filter_codec_opts(codec_opts, s->streams[i]->codecpar->codec_id,
1669 s, s->streams[i], NULL);
1670 return opts;
1671 }
1672
1673 void *grow_array(void *array, int elem_size, int *size, int new_size)
1674 {
1675 if (new_size >= INT_MAX / elem_size) {
1676 av_log(NULL, AV_LOG_ERROR, "Array too big.\n");
1677 exit_program(1);
1678 }
1679 if (*size < new_size) {
1680 uint8_t *tmp = av_realloc(array, new_size*elem_size);
1681 if (!tmp) {
1682 av_log(NULL, AV_LOG_ERROR, "Could not alloc buffer.\n");
1683 exit_program(1);
1684 }
1685 memset(tmp + *size*elem_size, 0, (new_size-*size) * elem_size);
1686 *size = new_size;
1687 return tmp;
1688 }
1689 return array;
1690 }
1691
1692 const char *media_type_string(enum AVMediaType media_type)
1693 {
1694 switch (media_type) {
1695 case AVMEDIA_TYPE_VIDEO: return "video";
1696 case AVMEDIA_TYPE_AUDIO: return "audio";
1697 case AVMEDIA_TYPE_DATA: return "data";
1698 case AVMEDIA_TYPE_SUBTITLE: return "subtitle";
1699 case AVMEDIA_TYPE_ATTACHMENT: return "attachment";
1700 default: return "unknown";
1701 }
1702 }