Libav
cmdutils.c
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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"
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 "cmdutils.h"
49 #include "version.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 
60 
61 static const int this_year = 2014;
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 != NULL) {
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 
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 == NULL) {
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 
265  dstcount = (int *)(so + 1);
266  *so = grow_array(*so, sizeof(**so), dstcount, *dstcount + 1);
267  (*so)[*dstcount - 1].specifier = av_strdup(p ? p + 1 : "");
268  dst = &(*so)[*dstcount - 1].u;
269  }
270 
271  if (po->flags & OPT_STRING) {
272  char *str;
273  str = av_strdup(arg);
274  av_freep(dst);
275  *(char **)dst = str;
276  } else if (po->flags & OPT_BOOL || po->flags & OPT_INT) {
277  *(int *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT_MIN, INT_MAX);
278  } else if (po->flags & OPT_INT64) {
279  *(int64_t *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT64_MIN, INT64_MAX);
280  } else if (po->flags & OPT_TIME) {
281  *(int64_t *)dst = parse_time_or_die(opt, arg, 1);
282  } else if (po->flags & OPT_FLOAT) {
283  *(float *)dst = parse_number_or_die(opt, arg, OPT_FLOAT, -INFINITY, INFINITY);
284  } else if (po->flags & OPT_DOUBLE) {
285  *(double *)dst = parse_number_or_die(opt, arg, OPT_DOUBLE, -INFINITY, INFINITY);
286  } else if (po->u.func_arg) {
287  int ret = po->u.func_arg(optctx, opt, arg);
288  if (ret < 0) {
290  "Failed to set value '%s' for option '%s'\n", arg, opt);
291  return ret;
292  }
293  }
294  if (po->flags & OPT_EXIT)
295  exit_program(0);
296 
297  return 0;
298 }
299 
300 int parse_option(void *optctx, const char *opt, const char *arg,
301  const OptionDef *options)
302 {
303  const OptionDef *po;
304  int ret;
305 
306  po = find_option(options, opt);
307  if (!po->name && opt[0] == 'n' && opt[1] == 'o') {
308  /* handle 'no' bool option */
309  po = find_option(options, opt + 2);
310  if ((po->name && (po->flags & OPT_BOOL)))
311  arg = "0";
312  } else if (po->flags & OPT_BOOL)
313  arg = "1";
314 
315  if (!po->name)
316  po = find_option(options, "default");
317  if (!po->name) {
318  av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'\n", opt);
319  return AVERROR(EINVAL);
320  }
321  if (po->flags & HAS_ARG && !arg) {
322  av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'\n", opt);
323  return AVERROR(EINVAL);
324  }
325 
326  ret = write_option(optctx, po, opt, arg);
327  if (ret < 0)
328  return ret;
329 
330  return !!(po->flags & HAS_ARG);
331 }
332 
333 void parse_options(void *optctx, int argc, char **argv, const OptionDef *options,
334  void (*parse_arg_function)(void *, const char*))
335 {
336  const char *opt;
337  int optindex, handleoptions = 1, ret;
338 
339  /* perform system-dependent conversions for arguments list */
340  prepare_app_arguments(&argc, &argv);
341 
342  /* parse options */
343  optindex = 1;
344  while (optindex < argc) {
345  opt = argv[optindex++];
346 
347  if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
348  if (opt[1] == '-' && opt[2] == '\0') {
349  handleoptions = 0;
350  continue;
351  }
352  opt++;
353 
354  if ((ret = parse_option(optctx, opt, argv[optindex], options)) < 0)
355  exit_program(1);
356  optindex += ret;
357  } else {
358  if (parse_arg_function)
359  parse_arg_function(optctx, opt);
360  }
361  }
362 }
363 
364 int parse_optgroup(void *optctx, OptionGroup *g)
365 {
366  int i, ret;
367 
368  av_log(NULL, AV_LOG_DEBUG, "Parsing a group of options: %s %s.\n",
369  g->group_def->name, g->arg);
370 
371  for (i = 0; i < g->nb_opts; i++) {
372  Option *o = &g->opts[i];
373 
374  if (g->group_def->flags &&
375  !(g->group_def->flags & o->opt->flags)) {
376  av_log(NULL, AV_LOG_ERROR, "Option %s (%s) cannot be applied to "
377  "%s %s -- you are trying to apply an input option to an "
378  "output file or vice versa. Move this option before the "
379  "file it belongs to.\n", o->key, o->opt->help,
380  g->group_def->name, g->arg);
381  return AVERROR(EINVAL);
382  }
383 
384  av_log(NULL, AV_LOG_DEBUG, "Applying option %s (%s) with argument %s.\n",
385  o->key, o->opt->help, o->val);
386 
387  ret = write_option(optctx, o->opt, o->key, o->val);
388  if (ret < 0)
389  return ret;
390  }
391 
392  av_log(NULL, AV_LOG_DEBUG, "Successfully parsed a group of options.\n");
393 
394  return 0;
395 }
396 
397 int locate_option(int argc, char **argv, const OptionDef *options,
398  const char *optname)
399 {
400  const OptionDef *po;
401  int i;
402 
403  for (i = 1; i < argc; i++) {
404  const char *cur_opt = argv[i];
405 
406  if (*cur_opt++ != '-')
407  continue;
408 
409  po = find_option(options, cur_opt);
410  if (!po->name && cur_opt[0] == 'n' && cur_opt[1] == 'o')
411  po = find_option(options, cur_opt + 2);
412 
413  if ((!po->name && !strcmp(cur_opt, optname)) ||
414  (po->name && !strcmp(optname, po->name)))
415  return i;
416 
417  if (!po || po->flags & HAS_ARG)
418  i++;
419  }
420  return 0;
421 }
422 
423 void parse_loglevel(int argc, char **argv, const OptionDef *options)
424 {
425  int idx = locate_option(argc, argv, options, "loglevel");
426  if (!idx)
427  idx = locate_option(argc, argv, options, "v");
428  if (idx && argv[idx + 1])
429  opt_loglevel(NULL, "loglevel", argv[idx + 1]);
430 }
431 
432 #define FLAGS (o->type == AV_OPT_TYPE_FLAGS) ? AV_DICT_APPEND : 0
433 int opt_default(void *optctx, const char *opt, const char *arg)
434 {
435  const AVOption *o;
436  char opt_stripped[128];
437  const char *p;
438  const AVClass *cc = avcodec_get_class(), *fc = avformat_get_class();
439 #if CONFIG_AVRESAMPLE
440  const AVClass *rc = avresample_get_class();
441 #endif
442 #if CONFIG_SWSCALE
443  const AVClass *sc = sws_get_class();
444 #endif
445 
446  if (!(p = strchr(opt, ':')))
447  p = opt + strlen(opt);
448  av_strlcpy(opt_stripped, opt, FFMIN(sizeof(opt_stripped), p - opt + 1));
449 
450  if ((o = av_opt_find(&cc, opt_stripped, NULL, 0,
452  ((opt[0] == 'v' || opt[0] == 'a' || opt[0] == 's') &&
453  (o = av_opt_find(&cc, opt + 1, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ))))
454  av_dict_set(&codec_opts, opt, arg, FLAGS);
455  else if ((o = av_opt_find(&fc, opt, NULL, 0,
457  av_dict_set(&format_opts, opt, arg, FLAGS);
458 #if CONFIG_AVRESAMPLE
459  else if ((o = av_opt_find(&rc, opt, NULL, 0,
461  av_dict_set(&resample_opts, opt, arg, FLAGS);
462 #endif
463 #if CONFIG_SWSCALE
464  else if ((o = av_opt_find(&sc, opt, NULL, 0,
466  // XXX we only support sws_flags, not arbitrary sws options
467  int ret = av_opt_set(sws_opts, opt, arg, 0);
468  if (ret < 0) {
469  av_log(NULL, AV_LOG_ERROR, "Error setting option %s.\n", opt);
470  return ret;
471  }
472  }
473 #endif
474 
475  if (o)
476  return 0;
478 }
479 
480 /*
481  * Check whether given option is a group separator.
482  *
483  * @return index of the group definition that matched or -1 if none
484  */
485 static int match_group_separator(const OptionGroupDef *groups, int nb_groups,
486  const char *opt)
487 {
488  int i;
489 
490  for (i = 0; i < nb_groups; i++) {
491  const OptionGroupDef *p = &groups[i];
492  if (p->sep && !strcmp(p->sep, opt))
493  return i;
494  }
495 
496  return -1;
497 }
498 
499 /*
500  * Finish parsing an option group.
501  *
502  * @param group_idx which group definition should this group belong to
503  * @param arg argument of the group delimiting option
504  */
505 static void finish_group(OptionParseContext *octx, int group_idx,
506  const char *arg)
507 {
508  OptionGroupList *l = &octx->groups[group_idx];
509  OptionGroup *g;
510 
511  GROW_ARRAY(l->groups, l->nb_groups);
512  g = &l->groups[l->nb_groups - 1];
513 
514  *g = octx->cur_group;
515  g->arg = arg;
516  g->group_def = l->group_def;
517 #if CONFIG_SWSCALE
518  g->sws_opts = sws_opts;
519 #endif
520  g->codec_opts = codec_opts;
523 
524  codec_opts = NULL;
525  format_opts = NULL;
526  resample_opts = NULL;
527 #if CONFIG_SWSCALE
528  sws_opts = NULL;
529 #endif
530  init_opts();
531 
532  memset(&octx->cur_group, 0, sizeof(octx->cur_group));
533 }
534 
535 /*
536  * Add an option instance to currently parsed group.
537  */
538 static void add_opt(OptionParseContext *octx, const OptionDef *opt,
539  const char *key, const char *val)
540 {
541  int global = !(opt->flags & (OPT_PERFILE | OPT_SPEC | OPT_OFFSET));
542  OptionGroup *g = global ? &octx->global_opts : &octx->cur_group;
543 
544  GROW_ARRAY(g->opts, g->nb_opts);
545  g->opts[g->nb_opts - 1].opt = opt;
546  g->opts[g->nb_opts - 1].key = key;
547  g->opts[g->nb_opts - 1].val = val;
548 }
549 
551  const OptionGroupDef *groups, int nb_groups)
552 {
553  static const OptionGroupDef global_group = { "global" };
554  int i;
555 
556  memset(octx, 0, sizeof(*octx));
557 
558  octx->nb_groups = nb_groups;
559  octx->groups = av_mallocz(sizeof(*octx->groups) * octx->nb_groups);
560  if (!octx->groups)
561  exit_program(1);
562 
563  for (i = 0; i < octx->nb_groups; i++)
564  octx->groups[i].group_def = &groups[i];
565 
566  octx->global_opts.group_def = &global_group;
567  octx->global_opts.arg = "";
568 
569  init_opts();
570 }
571 
573 {
574  int i, j;
575 
576  for (i = 0; i < octx->nb_groups; i++) {
577  OptionGroupList *l = &octx->groups[i];
578 
579  for (j = 0; j < l->nb_groups; j++) {
580  av_freep(&l->groups[j].opts);
584 #if CONFIG_SWSCALE
586 #endif
587  }
588  av_freep(&l->groups);
589  }
590  av_freep(&octx->groups);
591 
592  av_freep(&octx->cur_group.opts);
593  av_freep(&octx->global_opts.opts);
594 
595  uninit_opts();
596 }
597 
598 int split_commandline(OptionParseContext *octx, int argc, char *argv[],
599  const OptionDef *options,
600  const OptionGroupDef *groups, int nb_groups)
601 {
602  int optindex = 1;
603 
604  /* perform system-dependent conversions for arguments list */
605  prepare_app_arguments(&argc, &argv);
606 
607  init_parse_context(octx, groups, nb_groups);
608  av_log(NULL, AV_LOG_DEBUG, "Splitting the commandline.\n");
609 
610  while (optindex < argc) {
611  const char *opt = argv[optindex++], *arg;
612  const OptionDef *po;
613  int ret;
614 
615  av_log(NULL, AV_LOG_DEBUG, "Reading option '%s' ...", opt);
616 
617  /* unnamed group separators, e.g. output filename */
618  if (opt[0] != '-' || !opt[1]) {
619  finish_group(octx, 0, opt);
620  av_log(NULL, AV_LOG_DEBUG, " matched as %s.\n", groups[0].name);
621  continue;
622  }
623  opt++;
624 
625 #define GET_ARG(arg) \
626 do { \
627  arg = argv[optindex++]; \
628  if (!arg) { \
629  av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'.\n", opt);\
630  return AVERROR(EINVAL); \
631  } \
632 } while (0)
633 
634  /* named group separators, e.g. -i */
635  if ((ret = match_group_separator(groups, nb_groups, opt)) >= 0) {
636  GET_ARG(arg);
637  finish_group(octx, ret, arg);
638  av_log(NULL, AV_LOG_DEBUG, " matched as %s with argument '%s'.\n",
639  groups[ret].name, arg);
640  continue;
641  }
642 
643  /* normal options */
644  po = find_option(options, opt);
645  if (po->name) {
646  if (po->flags & OPT_EXIT) {
647  /* optional argument, e.g. -h */
648  arg = argv[optindex++];
649  } else if (po->flags & HAS_ARG) {
650  GET_ARG(arg);
651  } else {
652  arg = "1";
653  }
654 
655  add_opt(octx, po, opt, arg);
656  av_log(NULL, AV_LOG_DEBUG, " matched as option '%s' (%s) with "
657  "argument '%s'.\n", po->name, po->help, arg);
658  continue;
659  }
660 
661  /* AVOptions */
662  if (argv[optindex]) {
663  ret = opt_default(NULL, opt, argv[optindex]);
664  if (ret >= 0) {
665  av_log(NULL, AV_LOG_DEBUG, " matched as AVOption '%s' with "
666  "argument '%s'.\n", opt, argv[optindex]);
667  optindex++;
668  continue;
669  } else if (ret != AVERROR_OPTION_NOT_FOUND) {
670  av_log(NULL, AV_LOG_ERROR, "Error parsing option '%s' "
671  "with argument '%s'.\n", opt, argv[optindex]);
672  return ret;
673  }
674  }
675 
676  /* boolean -nofoo options */
677  if (opt[0] == 'n' && opt[1] == 'o' &&
678  (po = find_option(options, opt + 2)) &&
679  po->name && po->flags & OPT_BOOL) {
680  add_opt(octx, po, opt, "0");
681  av_log(NULL, AV_LOG_DEBUG, " matched as option '%s' (%s) with "
682  "argument 0.\n", po->name, po->help);
683  continue;
684  }
685 
686  av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'.\n", opt);
688  }
689 
690  if (octx->cur_group.nb_opts || codec_opts || format_opts || resample_opts)
691  av_log(NULL, AV_LOG_WARNING, "Trailing options were found on the "
692  "commandline.\n");
693 
694  av_log(NULL, AV_LOG_DEBUG, "Finished splitting the commandline.\n");
695 
696  return 0;
697 }
698 
699 int opt_cpuflags(void *optctx, const char *opt, const char *arg)
700 {
701  int flags = av_parse_cpu_flags(arg);
702 
703  if (flags < 0)
704  return flags;
705 
706  av_set_cpu_flags_mask(flags);
707  return 0;
708 }
709 
710 int opt_loglevel(void *optctx, const char *opt, const char *arg)
711 {
712  const struct { const char *name; int level; } log_levels[] = {
713  { "quiet" , AV_LOG_QUIET },
714  { "panic" , AV_LOG_PANIC },
715  { "fatal" , AV_LOG_FATAL },
716  { "error" , AV_LOG_ERROR },
717  { "warning", AV_LOG_WARNING },
718  { "info" , AV_LOG_INFO },
719  { "verbose", AV_LOG_VERBOSE },
720  { "debug" , AV_LOG_DEBUG },
721  };
722  char *tail;
723  int level;
724  int i;
725 
726  for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++) {
727  if (!strcmp(log_levels[i].name, arg)) {
728  av_log_set_level(log_levels[i].level);
729  return 0;
730  }
731  }
732 
733  level = strtol(arg, &tail, 10);
734  if (*tail) {
735  av_log(NULL, AV_LOG_FATAL, "Invalid loglevel \"%s\". "
736  "Possible levels are numbers or:\n", arg);
737  for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++)
738  av_log(NULL, AV_LOG_FATAL, "\"%s\"\n", log_levels[i].name);
739  exit_program(1);
740  }
741  av_log_set_level(level);
742  return 0;
743 }
744 
745 int opt_timelimit(void *optctx, const char *opt, const char *arg)
746 {
747 #if HAVE_SETRLIMIT
748  int lim = parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
749  struct rlimit rl = { lim, lim + 1 };
750  if (setrlimit(RLIMIT_CPU, &rl))
751  perror("setrlimit");
752 #else
753  av_log(NULL, AV_LOG_WARNING, "-%s not implemented on this OS\n", opt);
754 #endif
755  return 0;
756 }
757 
758 void print_error(const char *filename, int err)
759 {
760  char errbuf[128];
761  const char *errbuf_ptr = errbuf;
762 
763  if (av_strerror(err, errbuf, sizeof(errbuf)) < 0)
764  errbuf_ptr = strerror(AVUNERROR(err));
765  av_log(NULL, AV_LOG_ERROR, "%s: %s\n", filename, errbuf_ptr);
766 }
767 
768 // Debian/Ubuntu: see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=619530
769 // https://launchpad.net/bugs/765357
770 static int warned_cfg = 1;
771 
772 #define INDENT 1
773 #define SHOW_VERSION 2
774 #define SHOW_CONFIG 4
775 
776 #define PRINT_LIB_INFO(libname, LIBNAME, flags, level) \
777  if (CONFIG_##LIBNAME) { \
778  const char *indent = flags & INDENT? " " : ""; \
779  if (flags & SHOW_VERSION) { \
780  unsigned int version = libname##_version(); \
781  av_log(NULL, level, \
782  "%slib%-10s %2d.%3d.%2d / %2d.%3d.%2d\n", \
783  indent, #libname, \
784  LIB##LIBNAME##_VERSION_MAJOR, \
785  LIB##LIBNAME##_VERSION_MINOR, \
786  LIB##LIBNAME##_VERSION_MICRO, \
787  version >> 16, version >> 8 & 0xff, version & 0xff); \
788  } \
789  if (flags & SHOW_CONFIG) { \
790  const char *cfg = libname##_configuration(); \
791  if (strcmp(LIBAV_CONFIGURATION, cfg)) { \
792  if (!warned_cfg) { \
793  av_log(NULL, level, \
794  "%sWARNING: library configuration mismatch\n", \
795  indent); \
796  warned_cfg = 1; \
797  } \
798  av_log(NULL, level, "%s%-11s configuration: %s\n", \
799  indent, #libname, cfg); \
800  } \
801  } \
802  } \
803 
804 static void print_all_libs_info(int flags, int level)
805 {
806  PRINT_LIB_INFO(avutil, AVUTIL, flags, level);
807  PRINT_LIB_INFO(avcodec, AVCODEC, flags, level);
808  PRINT_LIB_INFO(avformat, AVFORMAT, flags, level);
809  PRINT_LIB_INFO(avdevice, AVDEVICE, flags, level);
810  PRINT_LIB_INFO(avfilter, AVFILTER, flags, level);
811  PRINT_LIB_INFO(avresample, AVRESAMPLE, flags, level);
812  PRINT_LIB_INFO(swscale, SWSCALE, flags, level);
813 }
814 
815 void show_banner(void)
816 {
818  "%s version " LIBAV_VERSION ", Copyright (c) %d-%d the Libav developers\n",
820  av_log(NULL, AV_LOG_INFO, " built on %s %s with %s\n",
821  __DATE__, __TIME__, CC_IDENT);
822  av_log(NULL, AV_LOG_VERBOSE, " configuration: " LIBAV_CONFIGURATION "\n");
825 }
826 
827 int show_version(void *optctx, const char *opt, const char *arg)
828 {
830  printf("%s " LIBAV_VERSION "\n", program_name);
832 
833  return 0;
834 }
835 
836 int show_license(void *optctx, const char *opt, const char *arg)
837 {
838  printf(
839 #if CONFIG_NONFREE
840  "This version of %s has nonfree parts compiled in.\n"
841  "Therefore it is not legally redistributable.\n",
843 #elif CONFIG_GPLV3
844  "%s is free software; you can redistribute it and/or modify\n"
845  "it under the terms of the GNU General Public License as published by\n"
846  "the Free Software Foundation; either version 3 of the License, or\n"
847  "(at your option) any later version.\n"
848  "\n"
849  "%s is distributed in the hope that it will be useful,\n"
850  "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
851  "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
852  "GNU General Public License for more details.\n"
853  "\n"
854  "You should have received a copy of the GNU General Public License\n"
855  "along with %s. If not, see <http://www.gnu.org/licenses/>.\n",
857 #elif CONFIG_GPL
858  "%s is free software; you can redistribute it and/or modify\n"
859  "it under the terms of the GNU General Public License as published by\n"
860  "the Free Software Foundation; either version 2 of the License, or\n"
861  "(at your option) any later version.\n"
862  "\n"
863  "%s is distributed in the hope that it will be useful,\n"
864  "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
865  "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
866  "GNU General Public License for more details.\n"
867  "\n"
868  "You should have received a copy of the GNU General Public License\n"
869  "along with %s; if not, write to the Free Software\n"
870  "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
872 #elif CONFIG_LGPLV3
873  "%s is free software; you can redistribute it and/or modify\n"
874  "it under the terms of the GNU Lesser General Public License as published by\n"
875  "the Free Software Foundation; either version 3 of the License, or\n"
876  "(at your option) any later version.\n"
877  "\n"
878  "%s is distributed in the hope that it will be useful,\n"
879  "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
880  "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
881  "GNU Lesser General Public License for more details.\n"
882  "\n"
883  "You should have received a copy of the GNU Lesser General Public License\n"
884  "along with %s. If not, see <http://www.gnu.org/licenses/>.\n",
886 #else
887  "%s is free software; you can redistribute it and/or\n"
888  "modify it under the terms of the GNU Lesser General Public\n"
889  "License as published by the Free Software Foundation; either\n"
890  "version 2.1 of the License, or (at your option) any later version.\n"
891  "\n"
892  "%s is distributed in the hope that it will be useful,\n"
893  "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
894  "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\n"
895  "Lesser General Public License for more details.\n"
896  "\n"
897  "You should have received a copy of the GNU Lesser General Public\n"
898  "License along with %s; if not, write to the Free Software\n"
899  "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
901 #endif
902  );
903 
904  return 0;
905 }
906 
907 int show_formats(void *optctx, const char *opt, const char *arg)
908 {
909  AVInputFormat *ifmt = NULL;
910  AVOutputFormat *ofmt = NULL;
911  const char *last_name;
912 
913  printf("File formats:\n"
914  " D. = Demuxing supported\n"
915  " .E = Muxing supported\n"
916  " --\n");
917  last_name = "000";
918  for (;;) {
919  int decode = 0;
920  int encode = 0;
921  const char *name = NULL;
922  const char *long_name = NULL;
923 
924  while ((ofmt = av_oformat_next(ofmt))) {
925  if ((name == NULL || strcmp(ofmt->name, name) < 0) &&
926  strcmp(ofmt->name, last_name) > 0) {
927  name = ofmt->name;
928  long_name = ofmt->long_name;
929  encode = 1;
930  }
931  }
932  while ((ifmt = av_iformat_next(ifmt))) {
933  if ((name == NULL || strcmp(ifmt->name, name) < 0) &&
934  strcmp(ifmt->name, last_name) > 0) {
935  name = ifmt->name;
936  long_name = ifmt->long_name;
937  encode = 0;
938  }
939  if (name && strcmp(ifmt->name, name) == 0)
940  decode = 1;
941  }
942  if (name == NULL)
943  break;
944  last_name = name;
945 
946  printf(" %s%s %-15s %s\n",
947  decode ? "D" : " ",
948  encode ? "E" : " ",
949  name,
950  long_name ? long_name:" ");
951  }
952  return 0;
953 }
954 
955 #define PRINT_CODEC_SUPPORTED(codec, field, type, list_name, term, get_name) \
956  if (codec->field) { \
957  const type *p = c->field; \
958  \
959  printf(" Supported " list_name ":"); \
960  while (*p != term) { \
961  get_name(*p); \
962  printf(" %s", name); \
963  p++; \
964  } \
965  printf("\n"); \
966  } \
967 
968 static void print_codec(const AVCodec *c)
969 {
970  int encoder = av_codec_is_encoder(c);
971 
972  printf("%s %s [%s]:\n", encoder ? "Encoder" : "Decoder", c->name,
973  c->long_name ? c->long_name : "");
974 
975  if (c->type == AVMEDIA_TYPE_VIDEO) {
976  printf(" Threading capabilities: ");
977  switch (c->capabilities & (CODEC_CAP_FRAME_THREADS |
980  CODEC_CAP_SLICE_THREADS: printf("frame and slice"); break;
981  case CODEC_CAP_FRAME_THREADS: printf("frame"); break;
982  case CODEC_CAP_SLICE_THREADS: printf("slice"); break;
983  default: printf("no"); break;
984  }
985  printf("\n");
986  }
987 
988  if (c->supported_framerates) {
989  const AVRational *fps = c->supported_framerates;
990 
991  printf(" Supported framerates:");
992  while (fps->num) {
993  printf(" %d/%d", fps->num, fps->den);
994  fps++;
995  }
996  printf("\n");
997  }
998  PRINT_CODEC_SUPPORTED(c, pix_fmts, enum AVPixelFormat, "pixel formats",
1000  PRINT_CODEC_SUPPORTED(c, supported_samplerates, int, "sample rates", 0,
1002  PRINT_CODEC_SUPPORTED(c, sample_fmts, enum AVSampleFormat, "sample formats",
1004  PRINT_CODEC_SUPPORTED(c, channel_layouts, uint64_t, "channel layouts",
1005  0, GET_CH_LAYOUT_DESC);
1006 
1007  if (c->priv_class) {
1011  }
1012 }
1013 
1014 static char get_media_type_char(enum AVMediaType type)
1015 {
1016  switch (type) {
1017  case AVMEDIA_TYPE_VIDEO: return 'V';
1018  case AVMEDIA_TYPE_AUDIO: return 'A';
1019  case AVMEDIA_TYPE_SUBTITLE: return 'S';
1020  default: return '?';
1021  }
1022 }
1023 
1024 static const AVCodec *next_codec_for_id(enum AVCodecID id, const AVCodec *prev,
1025  int encoder)
1026 {
1027  while ((prev = av_codec_next(prev))) {
1028  if (prev->id == id &&
1029  (encoder ? av_codec_is_encoder(prev) : av_codec_is_decoder(prev)))
1030  return prev;
1031  }
1032  return NULL;
1033 }
1034 
1035 static void print_codecs_for_id(enum AVCodecID id, int encoder)
1036 {
1037  const AVCodec *codec = NULL;
1038 
1039  printf(" (%s: ", encoder ? "encoders" : "decoders");
1040 
1041  while ((codec = next_codec_for_id(id, codec, encoder)))
1042  printf("%s ", codec->name);
1043 
1044  printf(")");
1045 }
1046 
1047 int show_codecs(void *optctx, const char *opt, const char *arg)
1048 {
1049  const AVCodecDescriptor *desc = NULL;
1050 
1051  printf("Codecs:\n"
1052  " D..... = Decoding supported\n"
1053  " .E.... = Encoding supported\n"
1054  " ..V... = Video codec\n"
1055  " ..A... = Audio codec\n"
1056  " ..S... = Subtitle codec\n"
1057  " ...I.. = Intra frame-only codec\n"
1058  " ....L. = Lossy compression\n"
1059  " .....S = Lossless compression\n"
1060  " -------\n");
1061  while ((desc = avcodec_descriptor_next(desc))) {
1062  const AVCodec *codec = NULL;
1063 
1064  printf(avcodec_find_decoder(desc->id) ? "D" : ".");
1065  printf(avcodec_find_encoder(desc->id) ? "E" : ".");
1066 
1067  printf("%c", get_media_type_char(desc->type));
1068  printf((desc->props & AV_CODEC_PROP_INTRA_ONLY) ? "I" : ".");
1069  printf((desc->props & AV_CODEC_PROP_LOSSY) ? "L" : ".");
1070  printf((desc->props & AV_CODEC_PROP_LOSSLESS) ? "S" : ".");
1071 
1072  printf(" %-20s %s", desc->name, desc->long_name ? desc->long_name : "");
1073 
1074  /* print decoders/encoders when there's more than one or their
1075  * names are different from codec name */
1076  while ((codec = next_codec_for_id(desc->id, codec, 0))) {
1077  if (strcmp(codec->name, desc->name)) {
1078  print_codecs_for_id(desc->id, 0);
1079  break;
1080  }
1081  }
1082  codec = NULL;
1083  while ((codec = next_codec_for_id(desc->id, codec, 1))) {
1084  if (strcmp(codec->name, desc->name)) {
1085  print_codecs_for_id(desc->id, 1);
1086  break;
1087  }
1088  }
1089 
1090  printf("\n");
1091  }
1092  return 0;
1093 }
1094 
1095 static void print_codecs(int encoder)
1096 {
1097  const AVCodecDescriptor *desc = NULL;
1098 
1099  printf("%s:\n"
1100  " V... = Video\n"
1101  " A... = Audio\n"
1102  " S... = Subtitle\n"
1103  " .F.. = Frame-level multithreading\n"
1104  " ..S. = Slice-level multithreading\n"
1105  " ...X = Codec is experimental\n"
1106  " ---\n",
1107  encoder ? "Encoders" : "Decoders");
1108  while ((desc = avcodec_descriptor_next(desc))) {
1109  const AVCodec *codec = NULL;
1110 
1111  while ((codec = next_codec_for_id(desc->id, codec, encoder))) {
1112  printf("%c", get_media_type_char(desc->type));
1113  printf((codec->capabilities & CODEC_CAP_FRAME_THREADS) ? "F" : ".");
1114  printf((codec->capabilities & CODEC_CAP_SLICE_THREADS) ? "S" : ".");
1115  printf((codec->capabilities & CODEC_CAP_EXPERIMENTAL) ? "X" : ".");
1116 
1117  printf(" %-20s %s", codec->name, codec->long_name ? codec->long_name : "");
1118  if (strcmp(codec->name, desc->name))
1119  printf(" (codec %s)", desc->name);
1120 
1121  printf("\n");
1122  }
1123  }
1124 }
1125 
1126 int show_decoders(void *optctx, const char *opt, const char *arg)
1127 {
1128  print_codecs(0);
1129  return 0;
1130 }
1131 
1132 int show_encoders(void *optctx, const char *opt, const char *arg)
1133 {
1134  print_codecs(1);
1135  return 0;
1136 }
1137 
1138 int show_bsfs(void *optctx, const char *opt, const char *arg)
1139 {
1140  AVBitStreamFilter *bsf = NULL;
1141 
1142  printf("Bitstream filters:\n");
1143  while ((bsf = av_bitstream_filter_next(bsf)))
1144  printf("%s\n", bsf->name);
1145  printf("\n");
1146  return 0;
1147 }
1148 
1149 int show_protocols(void *optctx, const char *opt, const char *arg)
1150 {
1151  void *opaque = NULL;
1152  const char *name;
1153 
1154  printf("Supported file protocols:\n"
1155  "Input:\n");
1156  while ((name = avio_enum_protocols(&opaque, 0)))
1157  printf("%s\n", name);
1158  printf("Output:\n");
1159  while ((name = avio_enum_protocols(&opaque, 1)))
1160  printf("%s\n", name);
1161  return 0;
1162 }
1163 
1164 int show_filters(void *optctx, const char *opt, const char *arg)
1165 {
1166  const AVFilter av_unused(*filter) = NULL;
1167 
1168  printf("Filters:\n");
1169 #if CONFIG_AVFILTER
1170  while ((filter = avfilter_next(filter)))
1171  printf("%-16s %s\n", filter->name, filter->description);
1172 #endif
1173  return 0;
1174 }
1175 
1176 int show_pix_fmts(void *optctx, const char *opt, const char *arg)
1177 {
1178  const AVPixFmtDescriptor *pix_desc = NULL;
1179 
1180  printf("Pixel formats:\n"
1181  "I.... = Supported Input format for conversion\n"
1182  ".O... = Supported Output format for conversion\n"
1183  "..H.. = Hardware accelerated format\n"
1184  "...P. = Paletted format\n"
1185  "....B = Bitstream format\n"
1186  "FLAGS NAME NB_COMPONENTS BITS_PER_PIXEL\n"
1187  "-----\n");
1188 
1189 #if !CONFIG_SWSCALE
1190 # define sws_isSupportedInput(x) 0
1191 # define sws_isSupportedOutput(x) 0
1192 #endif
1193 
1194  while ((pix_desc = av_pix_fmt_desc_next(pix_desc))) {
1195  enum AVPixelFormat pix_fmt = av_pix_fmt_desc_get_id(pix_desc);
1196  printf("%c%c%c%c%c %-16s %d %2d\n",
1197  sws_isSupportedInput (pix_fmt) ? 'I' : '.',
1198  sws_isSupportedOutput(pix_fmt) ? 'O' : '.',
1199  pix_desc->flags & AV_PIX_FMT_FLAG_HWACCEL ? 'H' : '.',
1200  pix_desc->flags & AV_PIX_FMT_FLAG_PAL ? 'P' : '.',
1201  pix_desc->flags & AV_PIX_FMT_FLAG_BITSTREAM ? 'B' : '.',
1202  pix_desc->name,
1203  pix_desc->nb_components,
1204  av_get_bits_per_pixel(pix_desc));
1205  }
1206  return 0;
1207 }
1208 
1209 int show_sample_fmts(void *optctx, const char *opt, const char *arg)
1210 {
1211  int i;
1212  char fmt_str[128];
1213  for (i = -1; i < AV_SAMPLE_FMT_NB; i++)
1214  printf("%s\n", av_get_sample_fmt_string(fmt_str, sizeof(fmt_str), i));
1215  return 0;
1216 }
1217 
1218 static void show_help_codec(const char *name, int encoder)
1219 {
1220  const AVCodecDescriptor *desc;
1221  const AVCodec *codec;
1222 
1223  if (!name) {
1224  av_log(NULL, AV_LOG_ERROR, "No codec name specified.\n");
1225  return;
1226  }
1227 
1228  codec = encoder ? avcodec_find_encoder_by_name(name) :
1230 
1231  if (codec)
1232  print_codec(codec);
1233  else if ((desc = avcodec_descriptor_get_by_name(name))) {
1234  int printed = 0;
1235 
1236  while ((codec = next_codec_for_id(desc->id, codec, encoder))) {
1237  printed = 1;
1238  print_codec(codec);
1239  }
1240 
1241  if (!printed) {
1242  av_log(NULL, AV_LOG_ERROR, "Codec '%s' is known to Libav, "
1243  "but no %s for it are available. Libav might need to be "
1244  "recompiled with additional external libraries.\n",
1245  name, encoder ? "encoders" : "decoders");
1246  }
1247  } else {
1248  av_log(NULL, AV_LOG_ERROR, "Codec '%s' is not recognized by Libav.\n",
1249  name);
1250  }
1251 }
1252 
1253 static void show_help_demuxer(const char *name)
1254 {
1255  const AVInputFormat *fmt = av_find_input_format(name);
1256 
1257  if (!fmt) {
1258  av_log(NULL, AV_LOG_ERROR, "Unknown format '%s'.\n", name);
1259  return;
1260  }
1261 
1262  printf("Demuxer %s [%s]:\n", fmt->name, fmt->long_name);
1263 
1264  if (fmt->extensions)
1265  printf(" Common extensions: %s.\n", fmt->extensions);
1266 
1267  if (fmt->priv_class)
1269 }
1270 
1271 static void show_help_muxer(const char *name)
1272 {
1273  const AVCodecDescriptor *desc;
1274  const AVOutputFormat *fmt = av_guess_format(name, NULL, NULL);
1275 
1276  if (!fmt) {
1277  av_log(NULL, AV_LOG_ERROR, "Unknown format '%s'.\n", name);
1278  return;
1279  }
1280 
1281  printf("Muxer %s [%s]:\n", fmt->name, fmt->long_name);
1282 
1283  if (fmt->extensions)
1284  printf(" Common extensions: %s.\n", fmt->extensions);
1285  if (fmt->mime_type)
1286  printf(" Mime type: %s.\n", fmt->mime_type);
1287  if (fmt->video_codec != AV_CODEC_ID_NONE &&
1288  (desc = avcodec_descriptor_get(fmt->video_codec))) {
1289  printf(" Default video codec: %s.\n", desc->name);
1290  }
1291  if (fmt->audio_codec != AV_CODEC_ID_NONE &&
1292  (desc = avcodec_descriptor_get(fmt->audio_codec))) {
1293  printf(" Default audio codec: %s.\n", desc->name);
1294  }
1295  if (fmt->subtitle_codec != AV_CODEC_ID_NONE &&
1296  (desc = avcodec_descriptor_get(fmt->subtitle_codec))) {
1297  printf(" Default subtitle codec: %s.\n", desc->name);
1298  }
1299 
1300  if (fmt->priv_class)
1302 }
1303 
1304 #if CONFIG_AVFILTER
1305 static void show_help_filter(const char *name)
1306 {
1307  const AVFilter *f = avfilter_get_by_name(name);
1308  int i, count;
1309 
1310  if (!name) {
1311  av_log(NULL, AV_LOG_ERROR, "No filter name specified.\n");
1312  return;
1313  } else if (!f) {
1314  av_log(NULL, AV_LOG_ERROR, "Unknown filter '%s'.\n", name);
1315  return;
1316  }
1317 
1318  printf("Filter %s [%s]:\n", f->name, f->description);
1319 
1321  printf(" slice threading supported\n");
1322 
1323  printf(" Inputs:\n");
1324  count = avfilter_pad_count(f->inputs);
1325  for (i = 0; i < count; i++) {
1326  printf(" %d %s (%s)\n", i, avfilter_pad_get_name(f->inputs, i),
1328  }
1330  printf(" dynamic (depending on the options)\n");
1331 
1332  printf(" Outputs:\n");
1333  count = avfilter_pad_count(f->outputs);
1334  for (i = 0; i < count; i++) {
1335  printf(" %d %s (%s)\n", i, avfilter_pad_get_name(f->outputs, i),
1337  }
1339  printf(" dynamic (depending on the options)\n");
1340 
1341  if (f->priv_class)
1344 }
1345 #endif
1346 
1347 int show_help(void *optctx, const char *opt, const char *arg)
1348 {
1349  char *topic, *par;
1351 
1352  topic = av_strdup(arg ? arg : "");
1353  par = strchr(topic, '=');
1354  if (par)
1355  *par++ = 0;
1356 
1357  if (!*topic) {
1358  show_help_default(topic, par);
1359  } else if (!strcmp(topic, "decoder")) {
1360  show_help_codec(par, 0);
1361  } else if (!strcmp(topic, "encoder")) {
1362  show_help_codec(par, 1);
1363  } else if (!strcmp(topic, "demuxer")) {
1364  show_help_demuxer(par);
1365  } else if (!strcmp(topic, "muxer")) {
1366  show_help_muxer(par);
1367 #if CONFIG_AVFILTER
1368  } else if (!strcmp(topic, "filter")) {
1369  show_help_filter(par);
1370 #endif
1371  } else {
1372  show_help_default(topic, par);
1373  }
1374 
1375  av_freep(&topic);
1376  return 0;
1377 }
1378 
1379 int read_yesno(void)
1380 {
1381  int c = getchar();
1382  int yesno = (av_toupper(c) == 'Y');
1383 
1384  while (c != '\n' && c != EOF)
1385  c = getchar();
1386 
1387  return yesno;
1388 }
1389 
1390 int cmdutils_read_file(const char *filename, char **bufptr, size_t *size)
1391 {
1392  int ret;
1393  FILE *f = fopen(filename, "rb");
1394 
1395  if (!f) {
1396  av_log(NULL, AV_LOG_ERROR, "Cannot read file '%s': %s\n", filename,
1397  strerror(errno));
1398  return AVERROR(errno);
1399  }
1400  fseek(f, 0, SEEK_END);
1401  *size = ftell(f);
1402  fseek(f, 0, SEEK_SET);
1403  *bufptr = av_malloc(*size + 1);
1404  if (!*bufptr) {
1405  av_log(NULL, AV_LOG_ERROR, "Could not allocate file buffer\n");
1406  fclose(f);
1407  return AVERROR(ENOMEM);
1408  }
1409  ret = fread(*bufptr, 1, *size, f);
1410  if (ret < *size) {
1411  av_free(*bufptr);
1412  if (ferror(f)) {
1413  av_log(NULL, AV_LOG_ERROR, "Error while reading file '%s': %s\n",
1414  filename, strerror(errno));
1415  ret = AVERROR(errno);
1416  } else
1417  ret = AVERROR_EOF;
1418  } else {
1419  ret = 0;
1420  (*bufptr)[(*size)++] = '\0';
1421  }
1422 
1423  fclose(f);
1424  return ret;
1425 }
1426 
1428 {
1429  ctx->num_faulty_pts = ctx->num_faulty_dts = 0;
1430  ctx->last_pts = ctx->last_dts = INT64_MIN;
1431 }
1432 
1433 int64_t guess_correct_pts(PtsCorrectionContext *ctx, int64_t reordered_pts,
1434  int64_t dts)
1435 {
1436  int64_t pts = AV_NOPTS_VALUE;
1437 
1438  if (dts != AV_NOPTS_VALUE) {
1439  ctx->num_faulty_dts += dts <= ctx->last_dts;
1440  ctx->last_dts = dts;
1441  }
1442  if (reordered_pts != AV_NOPTS_VALUE) {
1443  ctx->num_faulty_pts += reordered_pts <= ctx->last_pts;
1444  ctx->last_pts = reordered_pts;
1445  }
1446  if ((ctx->num_faulty_pts<=ctx->num_faulty_dts || dts == AV_NOPTS_VALUE)
1447  && reordered_pts != AV_NOPTS_VALUE)
1448  pts = reordered_pts;
1449  else
1450  pts = dts;
1451 
1452  return pts;
1453 }
1454 
1455 FILE *get_preset_file(char *filename, size_t filename_size,
1456  const char *preset_name, int is_path,
1457  const char *codec_name)
1458 {
1459  FILE *f = NULL;
1460  int i;
1461  const char *base[3] = { getenv("AVCONV_DATADIR"),
1462  getenv("HOME"),
1463  AVCONV_DATADIR, };
1464 
1465  if (is_path) {
1466  av_strlcpy(filename, preset_name, filename_size);
1467  f = fopen(filename, "r");
1468  } else {
1469  for (i = 0; i < 3 && !f; i++) {
1470  if (!base[i])
1471  continue;
1472  snprintf(filename, filename_size, "%s%s/%s.avpreset", base[i],
1473  i != 1 ? "" : "/.avconv", preset_name);
1474  f = fopen(filename, "r");
1475  if (!f && codec_name) {
1476  snprintf(filename, filename_size,
1477  "%s%s/%s-%s.avpreset",
1478  base[i], i != 1 ? "" : "/.avconv", codec_name,
1479  preset_name);
1480  f = fopen(filename, "r");
1481  }
1482  }
1483  }
1484 
1485  return f;
1486 }
1487 
1488 int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
1489 {
1490  if (*spec <= '9' && *spec >= '0') /* opt:index */
1491  return strtol(spec, NULL, 0) == st->index;
1492  else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
1493  *spec == 't') { /* opt:[vasdt] */
1494  enum AVMediaType type;
1495 
1496  switch (*spec++) {
1497  case 'v': type = AVMEDIA_TYPE_VIDEO; break;
1498  case 'a': type = AVMEDIA_TYPE_AUDIO; break;
1499  case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
1500  case 'd': type = AVMEDIA_TYPE_DATA; break;
1501  case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
1502  default: av_assert0(0);
1503  }
1504  if (type != st->codec->codec_type)
1505  return 0;
1506  if (*spec++ == ':') { /* possibly followed by :index */
1507  int i, index = strtol(spec, NULL, 0);
1508  for (i = 0; i < s->nb_streams; i++)
1509  if (s->streams[i]->codec->codec_type == type && index-- == 0)
1510  return i == st->index;
1511  return 0;
1512  }
1513  return 1;
1514  } else if (*spec == 'p' && *(spec + 1) == ':') {
1515  int prog_id, i, j;
1516  char *endptr;
1517  spec += 2;
1518  prog_id = strtol(spec, &endptr, 0);
1519  for (i = 0; i < s->nb_programs; i++) {
1520  if (s->programs[i]->id != prog_id)
1521  continue;
1522 
1523  if (*endptr++ == ':') {
1524  int stream_idx = strtol(endptr, NULL, 0);
1525  return stream_idx >= 0 &&
1526  stream_idx < s->programs[i]->nb_stream_indexes &&
1527  st->index == s->programs[i]->stream_index[stream_idx];
1528  }
1529 
1530  for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
1531  if (st->index == s->programs[i]->stream_index[j])
1532  return 1;
1533  }
1534  return 0;
1535  } else if (!*spec) /* empty specifier, matches everything */
1536  return 1;
1537 
1538  av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
1539  return AVERROR(EINVAL);
1540 }
1541 
1543  AVFormatContext *s, AVStream *st, AVCodec *codec)
1544 {
1545  AVDictionary *ret = NULL;
1549  char prefix = 0;
1550  const AVClass *cc = avcodec_get_class();
1551 
1552  if (!codec)
1553  codec = s->oformat ? avcodec_find_encoder(codec_id)
1554  : avcodec_find_decoder(codec_id);
1555 
1556  switch (st->codec->codec_type) {
1557  case AVMEDIA_TYPE_VIDEO:
1558  prefix = 'v';
1559  flags |= AV_OPT_FLAG_VIDEO_PARAM;
1560  break;
1561  case AVMEDIA_TYPE_AUDIO:
1562  prefix = 'a';
1563  flags |= AV_OPT_FLAG_AUDIO_PARAM;
1564  break;
1565  case AVMEDIA_TYPE_SUBTITLE:
1566  prefix = 's';
1567  flags |= AV_OPT_FLAG_SUBTITLE_PARAM;
1568  break;
1569  }
1570 
1571  while (t = av_dict_get(opts, "", t, AV_DICT_IGNORE_SUFFIX)) {
1572  char *p = strchr(t->key, ':');
1573 
1574  /* check stream specification in opt name */
1575  if (p)
1576  switch (check_stream_specifier(s, st, p + 1)) {
1577  case 1: *p = 0; break;
1578  case 0: continue;
1579  default: return NULL;
1580  }
1581 
1582  if (av_opt_find(&cc, t->key, NULL, flags, AV_OPT_SEARCH_FAKE_OBJ) ||
1583  (codec && codec->priv_class &&
1584  av_opt_find(&codec->priv_class, t->key, NULL, flags,
1586  av_dict_set(&ret, t->key, t->value, 0);
1587  else if (t->key[0] == prefix &&
1588  av_opt_find(&cc, t->key + 1, NULL, flags,
1590  av_dict_set(&ret, t->key + 1, t->value, 0);
1591 
1592  if (p)
1593  *p = ':';
1594  }
1595  return ret;
1596 }
1597 
1599  AVDictionary *codec_opts)
1600 {
1601  int i;
1602  AVDictionary **opts;
1603 
1604  if (!s->nb_streams)
1605  return NULL;
1606  opts = av_mallocz(s->nb_streams * sizeof(*opts));
1607  if (!opts) {
1609  "Could not alloc memory for stream options.\n");
1610  return NULL;
1611  }
1612  for (i = 0; i < s->nb_streams; i++)
1613  opts[i] = filter_codec_opts(codec_opts, s->streams[i]->codec->codec_id,
1614  s, s->streams[i], NULL);
1615  return opts;
1616 }
1617 
1618 void *grow_array(void *array, int elem_size, int *size, int new_size)
1619 {
1620  if (new_size >= INT_MAX / elem_size) {
1621  av_log(NULL, AV_LOG_ERROR, "Array too big.\n");
1622  exit_program(1);
1623  }
1624  if (*size < new_size) {
1625  uint8_t *tmp = av_realloc(array, new_size*elem_size);
1626  if (!tmp) {
1627  av_log(NULL, AV_LOG_ERROR, "Could not alloc buffer.\n");
1628  exit_program(1);
1629  }
1630  memset(tmp + *size*elem_size, 0, (new_size-*size) * elem_size);
1631  *size = new_size;
1632  return tmp;
1633  }
1634  return array;
1635 }
1636 
1637 const char *media_type_string(enum AVMediaType media_type)
1638 {
1639  switch (media_type) {
1640  case AVMEDIA_TYPE_VIDEO: return "video";
1641  case AVMEDIA_TYPE_AUDIO: return "audio";
1642  case AVMEDIA_TYPE_DATA: return "data";
1643  case AVMEDIA_TYPE_SUBTITLE: return "subtitle";
1644  case AVMEDIA_TYPE_ATTACHMENT: return "attachment";
1645  default: return "unknown";
1646  }
1647 }