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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 FFmpeg.
6  *
7  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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 "compat/va_copy.h"
34 #include "libavformat/avformat.h"
35 #include "libavfilter/avfilter.h"
36 #include "libavdevice/avdevice.h"
38 #include "libswscale/swscale.h"
41 #include "libavutil/avassert.h"
42 #include "libavutil/avstring.h"
43 #include "libavutil/bprint.h"
44 #include "libavutil/mathematics.h"
45 #include "libavutil/imgutils.h"
46 #include "libavutil/parseutils.h"
47 #include "libavutil/pixdesc.h"
48 #include "libavutil/eval.h"
49 #include "libavutil/dict.h"
50 #include "libavutil/opt.h"
51 #include "libavutil/cpu.h"
52 #include "libavutil/ffversion.h"
53 #include "cmdutils.h"
54 #if CONFIG_NETWORK
55 #include "libavformat/network.h"
56 #endif
57 #if HAVE_SYS_RESOURCE_H
58 #include <sys/time.h>
59 #include <sys/resource.h>
60 #endif
61 
62 static int init_report(const char *env);
63 
67 
68 static FILE *report_file;
70 int hide_banner = 0;
71 
72 void init_opts(void)
73 {
74 
75  if(CONFIG_SWSCALE)
76  sws_opts = sws_getContext(16, 16, 0, 16, 16, 0, SWS_BICUBIC,
77  NULL, NULL, NULL);
78 }
79 
80 void uninit_opts(void)
81 {
82 #if CONFIG_SWSCALE
83  sws_freeContext(sws_opts);
84  sws_opts = NULL;
85 #endif
86 
87  av_dict_free(&swr_opts);
88  av_dict_free(&format_opts);
89  av_dict_free(&codec_opts);
90  av_dict_free(&resample_opts);
91 }
92 
93 void log_callback_help(void *ptr, int level, const char *fmt, va_list vl)
94 {
95  vfprintf(stdout, fmt, vl);
96 }
97 
98 static void log_callback_report(void *ptr, int level, const char *fmt, va_list vl)
99 {
100  va_list vl2;
101  char line[1024];
102  static int print_prefix = 1;
103 
104  va_copy(vl2, vl);
105  av_log_default_callback(ptr, level, fmt, vl);
106  av_log_format_line(ptr, level, fmt, vl2, line, sizeof(line), &print_prefix);
107  va_end(vl2);
108  if (report_file_level >= level) {
109  fputs(line, report_file);
110  fflush(report_file);
111  }
112 }
113 
114 static void (*program_exit)(int ret);
115 
116 void register_exit(void (*cb)(int ret))
117 {
118  program_exit = cb;
119 }
120 
121 void exit_program(int ret)
122 {
123  if (program_exit)
124  program_exit(ret);
125 
126  exit(ret);
127 }
128 
129 double parse_number_or_die(const char *context, const char *numstr, int type,
130  double min, double max)
131 {
132  char *tail;
133  const char *error;
134  double d = av_strtod(numstr, &tail);
135  if (*tail)
136  error = "Expected number for %s but found: %s\n";
137  else if (d < min || d > max)
138  error = "The value for %s was %s which is not within %f - %f\n";
139  else if (type == OPT_INT64 && (int64_t)d != d)
140  error = "Expected int64 for %s but found %s\n";
141  else if (type == OPT_INT && (int)d != d)
142  error = "Expected int for %s but found %s\n";
143  else
144  return d;
145  av_log(NULL, AV_LOG_FATAL, error, context, numstr, min, max);
146  exit_program(1);
147  return 0;
148 }
149 
150 int64_t parse_time_or_die(const char *context, const char *timestr,
151  int is_duration)
152 {
153  int64_t us;
154  if (av_parse_time(&us, timestr, is_duration) < 0) {
155  av_log(NULL, AV_LOG_FATAL, "Invalid %s specification for %s: %s\n",
156  is_duration ? "duration" : "date", context, timestr);
157  exit_program(1);
158  }
159  return us;
160 }
161 
162 void show_help_options(const OptionDef *options, const char *msg, int req_flags,
163  int rej_flags, int alt_flags)
164 {
165  const OptionDef *po;
166  int first;
167 
168  first = 1;
169  for (po = options; po->name; po++) {
170  char buf[64];
171 
172  if (((po->flags & req_flags) != req_flags) ||
173  (alt_flags && !(po->flags & alt_flags)) ||
174  (po->flags & rej_flags))
175  continue;
176 
177  if (first) {
178  printf("%s\n", msg);
179  first = 0;
180  }
181  av_strlcpy(buf, po->name, sizeof(buf));
182  if (po->argname) {
183  av_strlcat(buf, " ", sizeof(buf));
184  av_strlcat(buf, po->argname, sizeof(buf));
185  }
186  printf("-%-17s %s\n", buf, po->help);
187  }
188  printf("\n");
189 }
190 
191 void show_help_children(const AVClass *class, int flags)
192 {
193  const AVClass *child = NULL;
194  if (class->option) {
195  av_opt_show2(&class, NULL, flags, 0);
196  printf("\n");
197  }
198 
199  while (child = av_opt_child_class_next(class, child))
200  show_help_children(child, flags);
201 }
202 
203 static const OptionDef *find_option(const OptionDef *po, const char *name)
204 {
205  const char *p = strchr(name, ':');
206  int len = p ? p - name : strlen(name);
207 
208  while (po->name) {
209  if (!strncmp(name, po->name, len) && strlen(po->name) == len)
210  break;
211  po++;
212  }
213  return po;
214 }
215 
216 /* _WIN32 means using the windows libc - cygwin doesn't define that
217  * by default. HAVE_COMMANDLINETOARGVW is true on cygwin, while
218  * it doesn't provide the actual command line via GetCommandLineW(). */
219 #if HAVE_COMMANDLINETOARGVW && defined(_WIN32)
220 #include <windows.h>
221 #include <shellapi.h>
222 /* Will be leaked on exit */
223 static char** win32_argv_utf8 = NULL;
224 static int win32_argc = 0;
225 
226 /**
227  * Prepare command line arguments for executable.
228  * For Windows - perform wide-char to UTF-8 conversion.
229  * Input arguments should be main() function arguments.
230  * @param argc_ptr Arguments number (including executable)
231  * @param argv_ptr Arguments list.
232  */
233 static void prepare_app_arguments(int *argc_ptr, char ***argv_ptr)
234 {
235  char *argstr_flat;
236  wchar_t **argv_w;
237  int i, buffsize = 0, offset = 0;
238 
239  if (win32_argv_utf8) {
240  *argc_ptr = win32_argc;
241  *argv_ptr = win32_argv_utf8;
242  return;
243  }
244 
245  win32_argc = 0;
246  argv_w = CommandLineToArgvW(GetCommandLineW(), &win32_argc);
247  if (win32_argc <= 0 || !argv_w)
248  return;
249 
250  /* determine the UTF-8 buffer size (including NULL-termination symbols) */
251  for (i = 0; i < win32_argc; i++)
252  buffsize += WideCharToMultiByte(CP_UTF8, 0, argv_w[i], -1,
253  NULL, 0, NULL, NULL);
254 
255  win32_argv_utf8 = av_mallocz(sizeof(char *) * (win32_argc + 1) + buffsize);
256  argstr_flat = (char *)win32_argv_utf8 + sizeof(char *) * (win32_argc + 1);
257  if (!win32_argv_utf8) {
258  LocalFree(argv_w);
259  return;
260  }
261 
262  for (i = 0; i < win32_argc; i++) {
263  win32_argv_utf8[i] = &argstr_flat[offset];
264  offset += WideCharToMultiByte(CP_UTF8, 0, argv_w[i], -1,
265  &argstr_flat[offset],
266  buffsize - offset, NULL, NULL);
267  }
268  win32_argv_utf8[i] = NULL;
269  LocalFree(argv_w);
270 
271  *argc_ptr = win32_argc;
272  *argv_ptr = win32_argv_utf8;
273 }
274 #else
275 static inline void prepare_app_arguments(int *argc_ptr, char ***argv_ptr)
276 {
277  /* nothing to do */
278 }
279 #endif /* HAVE_COMMANDLINETOARGVW */
280 
281 static int write_option(void *optctx, const OptionDef *po, const char *opt,
282  const char *arg)
283 {
284  /* new-style options contain an offset into optctx, old-style address of
285  * a global var*/
286  void *dst = po->flags & (OPT_OFFSET | OPT_SPEC) ?
287  (uint8_t *)optctx + po->u.off : po->u.dst_ptr;
288  int *dstcount;
289 
290  if (po->flags & OPT_SPEC) {
291  SpecifierOpt **so = dst;
292  char *p = strchr(opt, ':');
293 
294  dstcount = (int *)(so + 1);
295  *so = grow_array(*so, sizeof(**so), dstcount, *dstcount + 1);
296  (*so)[*dstcount - 1].specifier = av_strdup(p ? p + 1 : "");
297  dst = &(*so)[*dstcount - 1].u;
298  }
299 
300  if (po->flags & OPT_STRING) {
301  char *str;
302  str = av_strdup(arg);
303  av_freep(dst);
304  *(char **)dst = str;
305  } else if (po->flags & OPT_BOOL || po->flags & OPT_INT) {
306  *(int *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT_MIN, INT_MAX);
307  } else if (po->flags & OPT_INT64) {
308  *(int64_t *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT64_MIN, INT64_MAX);
309  } else if (po->flags & OPT_TIME) {
310  *(int64_t *)dst = parse_time_or_die(opt, arg, 1);
311  } else if (po->flags & OPT_FLOAT) {
312  *(float *)dst = parse_number_or_die(opt, arg, OPT_FLOAT, -INFINITY, INFINITY);
313  } else if (po->flags & OPT_DOUBLE) {
314  *(double *)dst = parse_number_or_die(opt, arg, OPT_DOUBLE, -INFINITY, INFINITY);
315  } else if (po->u.func_arg) {
316  int ret = po->u.func_arg(optctx, opt, arg);
317  if (ret < 0) {
318  av_log(NULL, AV_LOG_ERROR,
319  "Failed to set value '%s' for option '%s': %s\n",
320  arg, opt, av_err2str(ret));
321  return ret;
322  }
323  }
324  if (po->flags & OPT_EXIT)
325  exit_program(0);
326 
327  return 0;
328 }
329 
330 int parse_option(void *optctx, const char *opt, const char *arg,
331  const OptionDef *options)
332 {
333  const OptionDef *po;
334  int ret;
335 
336  po = find_option(options, opt);
337  if (!po->name && opt[0] == 'n' && opt[1] == 'o') {
338  /* handle 'no' bool option */
339  po = find_option(options, opt + 2);
340  if ((po->name && (po->flags & OPT_BOOL)))
341  arg = "0";
342  } else if (po->flags & OPT_BOOL)
343  arg = "1";
344 
345  if (!po->name)
346  po = find_option(options, "default");
347  if (!po->name) {
348  av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'\n", opt);
349  return AVERROR(EINVAL);
350  }
351  if (po->flags & HAS_ARG && !arg) {
352  av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'\n", opt);
353  return AVERROR(EINVAL);
354  }
355 
356  ret = write_option(optctx, po, opt, arg);
357  if (ret < 0)
358  return ret;
359 
360  return !!(po->flags & HAS_ARG);
361 }
362 
363 void parse_options(void *optctx, int argc, char **argv, const OptionDef *options,
364  void (*parse_arg_function)(void *, const char*))
365 {
366  const char *opt;
367  int optindex, handleoptions = 1, ret;
368 
369  /* perform system-dependent conversions for arguments list */
370  prepare_app_arguments(&argc, &argv);
371 
372  /* parse options */
373  optindex = 1;
374  while (optindex < argc) {
375  opt = argv[optindex++];
376 
377  if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
378  if (opt[1] == '-' && opt[2] == '\0') {
379  handleoptions = 0;
380  continue;
381  }
382  opt++;
383 
384  if ((ret = parse_option(optctx, opt, argv[optindex], options)) < 0)
385  exit_program(1);
386  optindex += ret;
387  } else {
388  if (parse_arg_function)
389  parse_arg_function(optctx, opt);
390  }
391  }
392 }
393 
394 int parse_optgroup(void *optctx, OptionGroup *g)
395 {
396  int i, ret;
397 
398  av_log(NULL, AV_LOG_DEBUG, "Parsing a group of options: %s %s.\n",
399  g->group_def->name, g->arg);
400 
401  for (i = 0; i < g->nb_opts; i++) {
402  Option *o = &g->opts[i];
403 
404  if (g->group_def->flags &&
405  !(g->group_def->flags & o->opt->flags)) {
406  av_log(NULL, AV_LOG_ERROR, "Option %s (%s) cannot be applied to "
407  "%s %s -- you are trying to apply an input option to an "
408  "output file or vice versa. Move this option before the "
409  "file it belongs to.\n", o->key, o->opt->help,
410  g->group_def->name, g->arg);
411  return AVERROR(EINVAL);
412  }
413 
414  av_log(NULL, AV_LOG_DEBUG, "Applying option %s (%s) with argument %s.\n",
415  o->key, o->opt->help, o->val);
416 
417  ret = write_option(optctx, o->opt, o->key, o->val);
418  if (ret < 0)
419  return ret;
420  }
421 
422  av_log(NULL, AV_LOG_DEBUG, "Successfully parsed a group of options.\n");
423 
424  return 0;
425 }
426 
427 int locate_option(int argc, char **argv, const OptionDef *options,
428  const char *optname)
429 {
430  const OptionDef *po;
431  int i;
432 
433  for (i = 1; i < argc; i++) {
434  const char *cur_opt = argv[i];
435 
436  if (*cur_opt++ != '-')
437  continue;
438 
439  po = find_option(options, cur_opt);
440  if (!po->name && cur_opt[0] == 'n' && cur_opt[1] == 'o')
441  po = find_option(options, cur_opt + 2);
442 
443  if ((!po->name && !strcmp(cur_opt, optname)) ||
444  (po->name && !strcmp(optname, po->name)))
445  return i;
446 
447  if (!po->name || po->flags & HAS_ARG)
448  i++;
449  }
450  return 0;
451 }
452 
453 static void dump_argument(const char *a)
454 {
455  const unsigned char *p;
456 
457  for (p = a; *p; p++)
458  if (!((*p >= '+' && *p <= ':') || (*p >= '@' && *p <= 'Z') ||
459  *p == '_' || (*p >= 'a' && *p <= 'z')))
460  break;
461  if (!*p) {
462  fputs(a, report_file);
463  return;
464  }
465  fputc('"', report_file);
466  for (p = a; *p; p++) {
467  if (*p == '\\' || *p == '"' || *p == '$' || *p == '`')
468  fprintf(report_file, "\\%c", *p);
469  else if (*p < ' ' || *p > '~')
470  fprintf(report_file, "\\x%02x", *p);
471  else
472  fputc(*p, report_file);
473  }
474  fputc('"', report_file);
475 }
476 
477 void parse_loglevel(int argc, char **argv, const OptionDef *options)
478 {
479  int idx = locate_option(argc, argv, options, "loglevel");
480  const char *env;
481  if (!idx)
482  idx = locate_option(argc, argv, options, "v");
483  if (idx && argv[idx + 1])
484  opt_loglevel(NULL, "loglevel", argv[idx + 1]);
485  idx = locate_option(argc, argv, options, "report");
486  if ((env = getenv("FFREPORT")) || idx) {
487  init_report(env);
488  if (report_file) {
489  int i;
490  fprintf(report_file, "Command line:\n");
491  for (i = 0; i < argc; i++) {
492  dump_argument(argv[i]);
493  fputc(i < argc - 1 ? ' ' : '\n', report_file);
494  }
495  fflush(report_file);
496  }
497  }
498  idx = locate_option(argc, argv, options, "hide_banner");
499  if (idx)
500  hide_banner = 1;
501 }
502 
503 static const AVOption *opt_find(void *obj, const char *name, const char *unit,
504  int opt_flags, int search_flags)
505 {
506  const AVOption *o = av_opt_find(obj, name, unit, opt_flags, search_flags);
507  if(o && !o->flags)
508  return NULL;
509  return o;
510 }
511 
512 #define FLAGS (o->type == AV_OPT_TYPE_FLAGS) ? AV_DICT_APPEND : 0
513 int opt_default(void *optctx, const char *opt, const char *arg)
514 {
515  const AVOption *o;
516  int consumed = 0;
517  char opt_stripped[128];
518  const char *p;
519  const AVClass *cc = avcodec_get_class(), *fc = avformat_get_class();
520 #if CONFIG_AVRESAMPLE
521  const AVClass *rc = avresample_get_class();
522 #endif
523  const AVClass *sc, *swr_class;
524 
525  if (!strcmp(opt, "debug") || !strcmp(opt, "fdebug"))
527 
528  if (!(p = strchr(opt, ':')))
529  p = opt + strlen(opt);
530  av_strlcpy(opt_stripped, opt, FFMIN(sizeof(opt_stripped), p - opt + 1));
531 
532  if ((o = opt_find(&cc, opt_stripped, NULL, 0,
534  ((opt[0] == 'v' || opt[0] == 'a' || opt[0] == 's') &&
535  (o = opt_find(&cc, opt + 1, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ)))) {
536  av_dict_set(&codec_opts, opt, arg, FLAGS);
537  consumed = 1;
538  }
539  if ((o = opt_find(&fc, opt, NULL, 0,
541  av_dict_set(&format_opts, opt, arg, FLAGS);
542  if (consumed)
543  av_log(NULL, AV_LOG_VERBOSE, "Routing option %s to both codec and muxer layer\n", opt);
544  consumed = 1;
545  }
546 #if CONFIG_SWSCALE
547  sc = sws_get_class();
548  if (!consumed && opt_find(&sc, opt, NULL, 0,
550  // XXX we only support sws_flags, not arbitrary sws options
551  int ret = av_opt_set(sws_opts, opt, arg, 0);
552  if (ret < 0) {
553  av_log(NULL, AV_LOG_ERROR, "Error setting option %s.\n", opt);
554  return ret;
555  }
556  consumed = 1;
557  }
558 #else
559  if (!consumed && !strcmp(opt, "sws_flags")) {
560  av_log(NULL, AV_LOG_WARNING, "Ignoring %s %s, due to disabled swscale\n", opt, arg);
561  consumed = 1;
562  }
563 #endif
564 #if CONFIG_SWRESAMPLE
565  swr_class = swr_get_class();
566  if (!consumed && (o=opt_find(&swr_class, opt, NULL, 0,
568  struct SwrContext *swr = swr_alloc();
569  int ret = av_opt_set(swr, opt, arg, 0);
570  swr_free(&swr);
571  if (ret < 0) {
572  av_log(NULL, AV_LOG_ERROR, "Error setting option %s.\n", opt);
573  return ret;
574  }
575  av_dict_set(&swr_opts, opt, arg, FLAGS);
576  consumed = 1;
577  }
578 #endif
579 #if CONFIG_AVRESAMPLE
580  if ((o=opt_find(&rc, opt, NULL, 0,
582  av_dict_set(&resample_opts, opt, arg, FLAGS);
583  consumed = 1;
584  }
585 #endif
586 
587  if (consumed)
588  return 0;
590 }
591 
592 /*
593  * Check whether given option is a group separator.
594  *
595  * @return index of the group definition that matched or -1 if none
596  */
597 static int match_group_separator(const OptionGroupDef *groups, int nb_groups,
598  const char *opt)
599 {
600  int i;
601 
602  for (i = 0; i < nb_groups; i++) {
603  const OptionGroupDef *p = &groups[i];
604  if (p->sep && !strcmp(p->sep, opt))
605  return i;
606  }
607 
608  return -1;
609 }
610 
611 /*
612  * Finish parsing an option group.
613  *
614  * @param group_idx which group definition should this group belong to
615  * @param arg argument of the group delimiting option
616  */
617 static void finish_group(OptionParseContext *octx, int group_idx,
618  const char *arg)
619 {
620  OptionGroupList *l = &octx->groups[group_idx];
621  OptionGroup *g;
622 
623  GROW_ARRAY(l->groups, l->nb_groups);
624  g = &l->groups[l->nb_groups - 1];
625 
626  *g = octx->cur_group;
627  g->arg = arg;
628  g->group_def = l->group_def;
629 #if CONFIG_SWSCALE
630  g->sws_opts = sws_opts;
631 #endif
632  g->swr_opts = swr_opts;
633  g->codec_opts = codec_opts;
636 
637  codec_opts = NULL;
638  format_opts = NULL;
639  resample_opts = NULL;
640 #if CONFIG_SWSCALE
641  sws_opts = NULL;
642 #endif
643  swr_opts = NULL;
644  init_opts();
645 
646  memset(&octx->cur_group, 0, sizeof(octx->cur_group));
647 }
648 
649 /*
650  * Add an option instance to currently parsed group.
651  */
652 static void add_opt(OptionParseContext *octx, const OptionDef *opt,
653  const char *key, const char *val)
654 {
655  int global = !(opt->flags & (OPT_PERFILE | OPT_SPEC | OPT_OFFSET));
656  OptionGroup *g = global ? &octx->global_opts : &octx->cur_group;
657 
658  GROW_ARRAY(g->opts, g->nb_opts);
659  g->opts[g->nb_opts - 1].opt = opt;
660  g->opts[g->nb_opts - 1].key = key;
661  g->opts[g->nb_opts - 1].val = val;
662 }
663 
665  const OptionGroupDef *groups, int nb_groups)
666 {
667  static const OptionGroupDef global_group = { "global" };
668  int i;
669 
670  memset(octx, 0, sizeof(*octx));
671 
672  octx->nb_groups = nb_groups;
673  octx->groups = av_mallocz_array(octx->nb_groups, sizeof(*octx->groups));
674  if (!octx->groups)
675  exit_program(1);
676 
677  for (i = 0; i < octx->nb_groups; i++)
678  octx->groups[i].group_def = &groups[i];
679 
680  octx->global_opts.group_def = &global_group;
681  octx->global_opts.arg = "";
682 
683  init_opts();
684 }
685 
687 {
688  int i, j;
689 
690  for (i = 0; i < octx->nb_groups; i++) {
691  OptionGroupList *l = &octx->groups[i];
692 
693  for (j = 0; j < l->nb_groups; j++) {
694  av_freep(&l->groups[j].opts);
698 #if CONFIG_SWSCALE
700 #endif
701  av_dict_free(&l->groups[j].swr_opts);
702  }
703  av_freep(&l->groups);
704  }
705  av_freep(&octx->groups);
706 
707  av_freep(&octx->cur_group.opts);
708  av_freep(&octx->global_opts.opts);
709 
710  uninit_opts();
711 }
712 
713 int split_commandline(OptionParseContext *octx, int argc, char *argv[],
714  const OptionDef *options,
715  const OptionGroupDef *groups, int nb_groups)
716 {
717  int optindex = 1;
718  int dashdash = -2;
719 
720  /* perform system-dependent conversions for arguments list */
721  prepare_app_arguments(&argc, &argv);
722 
723  init_parse_context(octx, groups, nb_groups);
724  av_log(NULL, AV_LOG_DEBUG, "Splitting the commandline.\n");
725 
726  while (optindex < argc) {
727  const char *opt = argv[optindex++], *arg;
728  const OptionDef *po;
729  int ret;
730 
731  av_log(NULL, AV_LOG_DEBUG, "Reading option '%s' ...", opt);
732 
733  if (opt[0] == '-' && opt[1] == '-' && !opt[2]) {
734  dashdash = optindex;
735  continue;
736  }
737  /* unnamed group separators, e.g. output filename */
738  if (opt[0] != '-' || !opt[1] || dashdash+1 == optindex) {
739  finish_group(octx, 0, opt);
740  av_log(NULL, AV_LOG_DEBUG, " matched as %s.\n", groups[0].name);
741  continue;
742  }
743  opt++;
744 
745 #define GET_ARG(arg) \
746 do { \
747  arg = argv[optindex++]; \
748  if (!arg) { \
749  av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'.\n", opt);\
750  return AVERROR(EINVAL); \
751  } \
752 } while (0)
753 
754  /* named group separators, e.g. -i */
755  if ((ret = match_group_separator(groups, nb_groups, opt)) >= 0) {
756  GET_ARG(arg);
757  finish_group(octx, ret, arg);
758  av_log(NULL, AV_LOG_DEBUG, " matched as %s with argument '%s'.\n",
759  groups[ret].name, arg);
760  continue;
761  }
762 
763  /* normal options */
764  po = find_option(options, opt);
765  if (po->name) {
766  if (po->flags & OPT_EXIT) {
767  /* optional argument, e.g. -h */
768  arg = argv[optindex++];
769  } else if (po->flags & HAS_ARG) {
770  GET_ARG(arg);
771  } else {
772  arg = "1";
773  }
774 
775  add_opt(octx, po, opt, arg);
776  av_log(NULL, AV_LOG_DEBUG, " matched as option '%s' (%s) with "
777  "argument '%s'.\n", po->name, po->help, arg);
778  continue;
779  }
780 
781  /* AVOptions */
782  if (argv[optindex]) {
783  ret = opt_default(NULL, opt, argv[optindex]);
784  if (ret >= 0) {
785  av_log(NULL, AV_LOG_DEBUG, " matched as AVOption '%s' with "
786  "argument '%s'.\n", opt, argv[optindex]);
787  optindex++;
788  continue;
789  } else if (ret != AVERROR_OPTION_NOT_FOUND) {
790  av_log(NULL, AV_LOG_ERROR, "Error parsing option '%s' "
791  "with argument '%s'.\n", opt, argv[optindex]);
792  return ret;
793  }
794  }
795 
796  /* boolean -nofoo options */
797  if (opt[0] == 'n' && opt[1] == 'o' &&
798  (po = find_option(options, opt + 2)) &&
799  po->name && po->flags & OPT_BOOL) {
800  add_opt(octx, po, opt, "0");
801  av_log(NULL, AV_LOG_DEBUG, " matched as option '%s' (%s) with "
802  "argument 0.\n", po->name, po->help);
803  continue;
804  }
805 
806  av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'.\n", opt);
808  }
809 
810  if (octx->cur_group.nb_opts || codec_opts || format_opts || resample_opts)
811  av_log(NULL, AV_LOG_WARNING, "Trailing options were found on the "
812  "commandline.\n");
813 
814  av_log(NULL, AV_LOG_DEBUG, "Finished splitting the commandline.\n");
815 
816  return 0;
817 }
818 
819 int opt_cpuflags(void *optctx, const char *opt, const char *arg)
820 {
821  int ret;
822  unsigned flags = av_get_cpu_flags();
823 
824  if ((ret = av_parse_cpu_caps(&flags, arg)) < 0)
825  return ret;
826 
827  av_force_cpu_flags(flags);
828  return 0;
829 }
830 
831 int opt_loglevel(void *optctx, const char *opt, const char *arg)
832 {
833  const struct { const char *name; int level; } log_levels[] = {
834  { "quiet" , AV_LOG_QUIET },
835  { "panic" , AV_LOG_PANIC },
836  { "fatal" , AV_LOG_FATAL },
837  { "error" , AV_LOG_ERROR },
838  { "warning", AV_LOG_WARNING },
839  { "info" , AV_LOG_INFO },
840  { "verbose", AV_LOG_VERBOSE },
841  { "debug" , AV_LOG_DEBUG },
842  };
843  char *tail;
844  int level;
845  int flags;
846  int i;
847 
848  flags = av_log_get_flags();
849  tail = strstr(arg, "repeat");
850  if (tail)
851  flags &= ~AV_LOG_SKIP_REPEATED;
852  else
853  flags |= AV_LOG_SKIP_REPEATED;
854 
855  av_log_set_flags(flags);
856  if (tail == arg)
857  arg += 6 + (arg[6]=='+');
858  if(tail && !*arg)
859  return 0;
860 
861  for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++) {
862  if (!strcmp(log_levels[i].name, arg)) {
863  av_log_set_level(log_levels[i].level);
864  return 0;
865  }
866  }
867 
868  level = strtol(arg, &tail, 10);
869  if (*tail) {
870  av_log(NULL, AV_LOG_FATAL, "Invalid loglevel \"%s\". "
871  "Possible levels are numbers or:\n", arg);
872  for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++)
873  av_log(NULL, AV_LOG_FATAL, "\"%s\"\n", log_levels[i].name);
874  exit_program(1);
875  }
876  av_log_set_level(level);
877  return 0;
878 }
879 
880 static void expand_filename_template(AVBPrint *bp, const char *template,
881  struct tm *tm)
882 {
883  int c;
884 
885  while ((c = *(template++))) {
886  if (c == '%') {
887  if (!(c = *(template++)))
888  break;
889  switch (c) {
890  case 'p':
891  av_bprintf(bp, "%s", program_name);
892  break;
893  case 't':
894  av_bprintf(bp, "%04d%02d%02d-%02d%02d%02d",
895  tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
896  tm->tm_hour, tm->tm_min, tm->tm_sec);
897  break;
898  case '%':
899  av_bprint_chars(bp, c, 1);
900  break;
901  }
902  } else {
903  av_bprint_chars(bp, c, 1);
904  }
905  }
906 }
907 
908 static int init_report(const char *env)
909 {
910  char *filename_template = NULL;
911  char *key, *val;
912  int ret, count = 0;
913  time_t now;
914  struct tm *tm;
915  AVBPrint filename;
916 
917  if (report_file) /* already opened */
918  return 0;
919  time(&now);
920  tm = localtime(&now);
921 
922  while (env && *env) {
923  if ((ret = av_opt_get_key_value(&env, "=", ":", 0, &key, &val)) < 0) {
924  if (count)
925  av_log(NULL, AV_LOG_ERROR,
926  "Failed to parse FFREPORT environment variable: %s\n",
927  av_err2str(ret));
928  break;
929  }
930  if (*env)
931  env++;
932  count++;
933  if (!strcmp(key, "file")) {
934  av_free(filename_template);
935  filename_template = val;
936  val = NULL;
937  } else if (!strcmp(key, "level")) {
938  char *tail;
939  report_file_level = strtol(val, &tail, 10);
940  if (*tail) {
941  av_log(NULL, AV_LOG_FATAL, "Invalid report file level\n");
942  exit_program(1);
943  }
944  } else {
945  av_log(NULL, AV_LOG_ERROR, "Unknown key '%s' in FFREPORT\n", key);
946  }
947  av_free(val);
948  av_free(key);
949  }
950 
951  av_bprint_init(&filename, 0, 1);
952  expand_filename_template(&filename,
953  av_x_if_null(filename_template, "%p-%t.log"), tm);
954  av_free(filename_template);
955  if (!av_bprint_is_complete(&filename)) {
956  av_log(NULL, AV_LOG_ERROR, "Out of memory building report file name\n");
957  return AVERROR(ENOMEM);
958  }
959 
960  report_file = fopen(filename.str, "w");
961  if (!report_file) {
962  int ret = AVERROR(errno);
963  av_log(NULL, AV_LOG_ERROR, "Failed to open report \"%s\": %s\n",
964  filename.str, strerror(errno));
965  return ret;
966  }
968  av_log(NULL, AV_LOG_INFO,
969  "%s started on %04d-%02d-%02d at %02d:%02d:%02d\n"
970  "Report written to \"%s\"\n",
971  program_name,
972  tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
973  tm->tm_hour, tm->tm_min, tm->tm_sec,
974  filename.str);
975  av_bprint_finalize(&filename, NULL);
976  return 0;
977 }
978 
979 int opt_report(const char *opt)
980 {
981  return init_report(NULL);
982 }
983 
984 int opt_max_alloc(void *optctx, const char *opt, const char *arg)
985 {
986  char *tail;
987  size_t max;
988 
989  max = strtol(arg, &tail, 10);
990  if (*tail) {
991  av_log(NULL, AV_LOG_FATAL, "Invalid max_alloc \"%s\".\n", arg);
992  exit_program(1);
993  }
994  av_max_alloc(max);
995  return 0;
996 }
997 
998 int opt_timelimit(void *optctx, const char *opt, const char *arg)
999 {
1000 #if HAVE_SETRLIMIT
1001  int lim = parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
1002  struct rlimit rl = { lim, lim + 1 };
1003  if (setrlimit(RLIMIT_CPU, &rl))
1004  perror("setrlimit");
1005 #else
1006  av_log(NULL, AV_LOG_WARNING, "-%s not implemented on this OS\n", opt);
1007 #endif
1008  return 0;
1009 }
1010 
1011 void print_error(const char *filename, int err)
1012 {
1013  char errbuf[128];
1014  const char *errbuf_ptr = errbuf;
1015 
1016  if (av_strerror(err, errbuf, sizeof(errbuf)) < 0)
1017  errbuf_ptr = strerror(AVUNERROR(err));
1018  av_log(NULL, AV_LOG_ERROR, "%s: %s\n", filename, errbuf_ptr);
1019 }
1020 
1021 static int warned_cfg = 0;
1022 
1023 #define INDENT 1
1024 #define SHOW_VERSION 2
1025 #define SHOW_CONFIG 4
1026 #define SHOW_COPYRIGHT 8
1027 
1028 #define PRINT_LIB_INFO(libname, LIBNAME, flags, level) \
1029  if (CONFIG_##LIBNAME) { \
1030  const char *indent = flags & INDENT? " " : ""; \
1031  if (flags & SHOW_VERSION) { \
1032  unsigned int version = libname##_version(); \
1033  av_log(NULL, level, \
1034  "%slib%-11s %2d.%3d.%3d / %2d.%3d.%3d\n", \
1035  indent, #libname, \
1036  LIB##LIBNAME##_VERSION_MAJOR, \
1037  LIB##LIBNAME##_VERSION_MINOR, \
1038  LIB##LIBNAME##_VERSION_MICRO, \
1039  version >> 16, version >> 8 & 0xff, version & 0xff); \
1040  } \
1041  if (flags & SHOW_CONFIG) { \
1042  const char *cfg = libname##_configuration(); \
1043  if (strcmp(FFMPEG_CONFIGURATION, cfg)) { \
1044  if (!warned_cfg) { \
1045  av_log(NULL, level, \
1046  "%sWARNING: library configuration mismatch\n", \
1047  indent); \
1048  warned_cfg = 1; \
1049  } \
1050  av_log(NULL, level, "%s%-11s configuration: %s\n", \
1051  indent, #libname, cfg); \
1052  } \
1053  } \
1054  } \
1055 
1056 static void print_all_libs_info(int flags, int level)
1057 {
1058  PRINT_LIB_INFO(avutil, AVUTIL, flags, level);
1059  PRINT_LIB_INFO(avcodec, AVCODEC, flags, level);
1060  PRINT_LIB_INFO(avformat, AVFORMAT, flags, level);
1061  PRINT_LIB_INFO(avdevice, AVDEVICE, flags, level);
1062  PRINT_LIB_INFO(avfilter, AVFILTER, flags, level);
1063  PRINT_LIB_INFO(avresample, AVRESAMPLE, flags, level);
1064  PRINT_LIB_INFO(swscale, SWSCALE, flags, level);
1065  PRINT_LIB_INFO(swresample,SWRESAMPLE, flags, level);
1066  PRINT_LIB_INFO(postproc, POSTPROC, flags, level);
1067 }
1068 
1069 static void print_program_info(int flags, int level)
1070 {
1071  const char *indent = flags & INDENT? " " : "";
1072 
1073  av_log(NULL, level, "%s version " FFMPEG_VERSION, program_name);
1074  if (flags & SHOW_COPYRIGHT)
1075  av_log(NULL, level, " Copyright (c) %d-%d the FFmpeg developers",
1076  program_birth_year, CONFIG_THIS_YEAR);
1077  av_log(NULL, level, "\n");
1078  av_log(NULL, level, "%sbuilt on %s %s with %s\n",
1079  indent, __DATE__, __TIME__, CC_IDENT);
1080 
1081  av_log(NULL, level, "%sconfiguration: " FFMPEG_CONFIGURATION "\n", indent);
1082 }
1083 
1084 static void print_buildconf(int flags, int level)
1085 {
1086  const char *indent = flags & INDENT ? " " : "";
1087  char str[] = { FFMPEG_CONFIGURATION };
1088  char *conflist, *remove_tilde, *splitconf;
1089 
1090  // Change all the ' --' strings to '~--' so that
1091  // they can be identified as tokens.
1092  while ((conflist = strstr(str, " --")) != NULL) {
1093  strncpy(conflist, "~--", 3);
1094  }
1095 
1096  // Compensate for the weirdness this would cause
1097  // when passing 'pkg-config --static'.
1098  while ((remove_tilde = strstr(str, "pkg-config~")) != NULL) {
1099  strncpy(remove_tilde, "pkg-config ", 11);
1100  }
1101 
1102  splitconf = strtok(str, "~");
1103  av_log(NULL, level, "\n%sconfiguration:\n", indent);
1104  while (splitconf != NULL) {
1105  av_log(NULL, level, "%s%s%s\n", indent, indent, splitconf);
1106  splitconf = strtok(NULL, "~");
1107  }
1108 }
1109 
1110 void show_banner(int argc, char **argv, const OptionDef *options)
1111 {
1112  int idx = locate_option(argc, argv, options, "version");
1113  if (hide_banner || idx)
1114  return;
1115 
1119 }
1120 
1121 int show_version(void *optctx, const char *opt, const char *arg)
1122 {
1126 
1127  return 0;
1128 }
1129 
1130 int show_buildconf(void *optctx, const char *opt, const char *arg)
1131 {
1134 
1135  return 0;
1136 }
1137 
1138 int show_license(void *optctx, const char *opt, const char *arg)
1139 {
1140 #if CONFIG_NONFREE
1141  printf(
1142  "This version of %s has nonfree parts compiled in.\n"
1143  "Therefore it is not legally redistributable.\n",
1144  program_name );
1145 #elif CONFIG_GPLV3
1146  printf(
1147  "%s is free software; you can redistribute it and/or modify\n"
1148  "it under the terms of the GNU General Public License as published by\n"
1149  "the Free Software Foundation; either version 3 of the License, or\n"
1150  "(at your option) any later version.\n"
1151  "\n"
1152  "%s is distributed in the hope that it will be useful,\n"
1153  "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
1154  "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
1155  "GNU General Public License for more details.\n"
1156  "\n"
1157  "You should have received a copy of the GNU General Public License\n"
1158  "along with %s. If not, see <http://www.gnu.org/licenses/>.\n",
1160 #elif CONFIG_GPL
1161  printf(
1162  "%s is free software; you can redistribute it and/or modify\n"
1163  "it under the terms of the GNU General Public License as published by\n"
1164  "the Free Software Foundation; either version 2 of the License, or\n"
1165  "(at your option) any later version.\n"
1166  "\n"
1167  "%s is distributed in the hope that it will be useful,\n"
1168  "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
1169  "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
1170  "GNU General Public License for more details.\n"
1171  "\n"
1172  "You should have received a copy of the GNU General Public License\n"
1173  "along with %s; if not, write to the Free Software\n"
1174  "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
1176 #elif CONFIG_LGPLV3
1177  printf(
1178  "%s is free software; you can redistribute it and/or modify\n"
1179  "it under the terms of the GNU Lesser General Public License as published by\n"
1180  "the Free Software Foundation; either version 3 of the License, or\n"
1181  "(at your option) any later version.\n"
1182  "\n"
1183  "%s is distributed in the hope that it will be useful,\n"
1184  "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
1185  "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
1186  "GNU Lesser General Public License for more details.\n"
1187  "\n"
1188  "You should have received a copy of the GNU Lesser General Public License\n"
1189  "along with %s. If not, see <http://www.gnu.org/licenses/>.\n",
1191 #else
1192  printf(
1193  "%s is free software; you can redistribute it and/or\n"
1194  "modify it under the terms of the GNU Lesser General Public\n"
1195  "License as published by the Free Software Foundation; either\n"
1196  "version 2.1 of the License, or (at your option) any later version.\n"
1197  "\n"
1198  "%s is distributed in the hope that it will be useful,\n"
1199  "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
1200  "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\n"
1201  "Lesser General Public License for more details.\n"
1202  "\n"
1203  "You should have received a copy of the GNU Lesser General Public\n"
1204  "License along with %s; if not, write to the Free Software\n"
1205  "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
1207 #endif
1208 
1209  return 0;
1210 }
1211 
1212 static int is_device(const AVClass *avclass)
1213 {
1214  if (!avclass)
1215  return 0;
1216  return avclass->category == AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT ||
1222 }
1223 
1224 static int show_formats_devices(void *optctx, const char *opt, const char *arg, int device_only)
1225 {
1226  AVInputFormat *ifmt = NULL;
1227  AVOutputFormat *ofmt = NULL;
1228  const char *last_name;
1229  int is_dev;
1230 
1231  printf("%s\n"
1232  " D. = Demuxing supported\n"
1233  " .E = Muxing supported\n"
1234  " --\n", device_only ? "Devices:" : "File formats:");
1235  last_name = "000";
1236  for (;;) {
1237  int decode = 0;
1238  int encode = 0;
1239  const char *name = NULL;
1240  const char *long_name = NULL;
1241 
1242  while ((ofmt = av_oformat_next(ofmt))) {
1243  is_dev = is_device(ofmt->priv_class);
1244  if (!is_dev && device_only)
1245  continue;
1246  if ((!name || strcmp(ofmt->name, name) < 0) &&
1247  strcmp(ofmt->name, last_name) > 0) {
1248  name = ofmt->name;
1249  long_name = ofmt->long_name;
1250  encode = 1;
1251  }
1252  }
1253  while ((ifmt = av_iformat_next(ifmt))) {
1254  is_dev = is_device(ifmt->priv_class);
1255  if (!is_dev && device_only)
1256  continue;
1257  if ((!name || strcmp(ifmt->name, name) < 0) &&
1258  strcmp(ifmt->name, last_name) > 0) {
1259  name = ifmt->name;
1260  long_name = ifmt->long_name;
1261  encode = 0;
1262  }
1263  if (name && strcmp(ifmt->name, name) == 0)
1264  decode = 1;
1265  }
1266  if (!name)
1267  break;
1268  last_name = name;
1269 
1270  printf(" %s%s %-15s %s\n",
1271  decode ? "D" : " ",
1272  encode ? "E" : " ",
1273  name,
1274  long_name ? long_name:" ");
1275  }
1276  return 0;
1277 }
1278 
1279 int show_formats(void *optctx, const char *opt, const char *arg)
1280 {
1281  return show_formats_devices(optctx, opt, arg, 0);
1282 }
1283 
1284 int show_devices(void *optctx, const char *opt, const char *arg)
1285 {
1286  return show_formats_devices(optctx, opt, arg, 1);
1287 }
1288 
1289 #define PRINT_CODEC_SUPPORTED(codec, field, type, list_name, term, get_name) \
1290  if (codec->field) { \
1291  const type *p = codec->field; \
1292  \
1293  printf(" Supported " list_name ":"); \
1294  while (*p != term) { \
1295  get_name(*p); \
1296  printf(" %s", name); \
1297  p++; \
1298  } \
1299  printf("\n"); \
1300  } \
1301 
1302 static void print_codec(const AVCodec *c)
1303 {
1304  int encoder = av_codec_is_encoder(c);
1305 
1306  printf("%s %s [%s]:\n", encoder ? "Encoder" : "Decoder", c->name,
1307  c->long_name ? c->long_name : "");
1308 
1309  if (c->type == AVMEDIA_TYPE_VIDEO ||
1310  c->type == AVMEDIA_TYPE_AUDIO) {
1311  printf(" Threading capabilities: ");
1312  switch (c->capabilities & (CODEC_CAP_FRAME_THREADS |
1315  CODEC_CAP_SLICE_THREADS: printf("frame and slice"); break;
1316  case CODEC_CAP_FRAME_THREADS: printf("frame"); break;
1317  case CODEC_CAP_SLICE_THREADS: printf("slice"); break;
1318  default: printf("no"); break;
1319  }
1320  printf("\n");
1321  }
1322 
1323  if (c->supported_framerates) {
1324  const AVRational *fps = c->supported_framerates;
1325 
1326  printf(" Supported framerates:");
1327  while (fps->num) {
1328  printf(" %d/%d", fps->num, fps->den);
1329  fps++;
1330  }
1331  printf("\n");
1332  }
1333  PRINT_CODEC_SUPPORTED(c, pix_fmts, enum AVPixelFormat, "pixel formats",
1335  PRINT_CODEC_SUPPORTED(c, supported_samplerates, int, "sample rates", 0,
1337  PRINT_CODEC_SUPPORTED(c, sample_fmts, enum AVSampleFormat, "sample formats",
1339  PRINT_CODEC_SUPPORTED(c, channel_layouts, uint64_t, "channel layouts",
1340  0, GET_CH_LAYOUT_DESC);
1341 
1342  if (c->priv_class) {
1346  }
1347 }
1348 
1350 {
1351  switch (type) {
1352  case AVMEDIA_TYPE_VIDEO: return 'V';
1353  case AVMEDIA_TYPE_AUDIO: return 'A';
1354  case AVMEDIA_TYPE_DATA: return 'D';
1355  case AVMEDIA_TYPE_SUBTITLE: return 'S';
1356  case AVMEDIA_TYPE_ATTACHMENT:return 'T';
1357  default: return '?';
1358  }
1359 }
1360 
1361 static const AVCodec *next_codec_for_id(enum AVCodecID id, const AVCodec *prev,
1362  int encoder)
1363 {
1364  while ((prev = av_codec_next(prev))) {
1365  if (prev->id == id &&
1366  (encoder ? av_codec_is_encoder(prev) : av_codec_is_decoder(prev)))
1367  return prev;
1368  }
1369  return NULL;
1370 }
1371 
1372 static int compare_codec_desc(const void *a, const void *b)
1373 {
1374  const AVCodecDescriptor * const *da = a;
1375  const AVCodecDescriptor * const *db = b;
1376 
1377  return (*da)->type != (*db)->type ? (*da)->type - (*db)->type :
1378  strcmp((*da)->name, (*db)->name);
1379 }
1380 
1381 static unsigned get_codecs_sorted(const AVCodecDescriptor ***rcodecs)
1382 {
1383  const AVCodecDescriptor *desc = NULL;
1384  const AVCodecDescriptor **codecs;
1385  unsigned nb_codecs = 0, i = 0;
1386 
1387  while ((desc = avcodec_descriptor_next(desc)))
1388  nb_codecs++;
1389  if (!(codecs = av_calloc(nb_codecs, sizeof(*codecs)))) {
1390  av_log(NULL, AV_LOG_ERROR, "Out of memory\n");
1391  exit_program(1);
1392  }
1393  desc = NULL;
1394  while ((desc = avcodec_descriptor_next(desc)))
1395  codecs[i++] = desc;
1396  av_assert0(i == nb_codecs);
1397  qsort(codecs, nb_codecs, sizeof(*codecs), compare_codec_desc);
1398  *rcodecs = codecs;
1399  return nb_codecs;
1400 }
1401 
1402 static void print_codecs_for_id(enum AVCodecID id, int encoder)
1403 {
1404  const AVCodec *codec = NULL;
1405 
1406  printf(" (%s: ", encoder ? "encoders" : "decoders");
1407 
1408  while ((codec = next_codec_for_id(id, codec, encoder)))
1409  printf("%s ", codec->name);
1410 
1411  printf(")");
1412 }
1413 
1414 int show_codecs(void *optctx, const char *opt, const char *arg)
1415 {
1416  const AVCodecDescriptor **codecs;
1417  unsigned i, nb_codecs = get_codecs_sorted(&codecs);
1418 
1419  printf("Codecs:\n"
1420  " D..... = Decoding supported\n"
1421  " .E.... = Encoding supported\n"
1422  " ..V... = Video codec\n"
1423  " ..A... = Audio codec\n"
1424  " ..S... = Subtitle codec\n"
1425  " ...I.. = Intra frame-only codec\n"
1426  " ....L. = Lossy compression\n"
1427  " .....S = Lossless compression\n"
1428  " -------\n");
1429  for (i = 0; i < nb_codecs; i++) {
1430  const AVCodecDescriptor *desc = codecs[i];
1431  const AVCodec *codec = NULL;
1432 
1433  if (strstr(desc->name, "_deprecated"))
1434  continue;
1435 
1436  printf(" ");
1437  printf(avcodec_find_decoder(desc->id) ? "D" : ".");
1438  printf(avcodec_find_encoder(desc->id) ? "E" : ".");
1439 
1440  printf("%c", get_media_type_char(desc->type));
1441  printf((desc->props & AV_CODEC_PROP_INTRA_ONLY) ? "I" : ".");
1442  printf((desc->props & AV_CODEC_PROP_LOSSY) ? "L" : ".");
1443  printf((desc->props & AV_CODEC_PROP_LOSSLESS) ? "S" : ".");
1444 
1445  printf(" %-20s %s", desc->name, desc->long_name ? desc->long_name : "");
1446 
1447  /* print decoders/encoders when there's more than one or their
1448  * names are different from codec name */
1449  while ((codec = next_codec_for_id(desc->id, codec, 0))) {
1450  if (strcmp(codec->name, desc->name)) {
1451  print_codecs_for_id(desc->id, 0);
1452  break;
1453  }
1454  }
1455  codec = NULL;
1456  while ((codec = next_codec_for_id(desc->id, codec, 1))) {
1457  if (strcmp(codec->name, desc->name)) {
1458  print_codecs_for_id(desc->id, 1);
1459  break;
1460  }
1461  }
1462 
1463  printf("\n");
1464  }
1465  av_free(codecs);
1466  return 0;
1467 }
1468 
1469 static void print_codecs(int encoder)
1470 {
1471  const AVCodecDescriptor **codecs;
1472  unsigned i, nb_codecs = get_codecs_sorted(&codecs);
1473 
1474  printf("%s:\n"
1475  " V..... = Video\n"
1476  " A..... = Audio\n"
1477  " S..... = Subtitle\n"
1478  " .F.... = Frame-level multithreading\n"
1479  " ..S... = Slice-level multithreading\n"
1480  " ...X.. = Codec is experimental\n"
1481  " ....B. = Supports draw_horiz_band\n"
1482  " .....D = Supports direct rendering method 1\n"
1483  " ------\n",
1484  encoder ? "Encoders" : "Decoders");
1485  for (i = 0; i < nb_codecs; i++) {
1486  const AVCodecDescriptor *desc = codecs[i];
1487  const AVCodec *codec = NULL;
1488 
1489  while ((codec = next_codec_for_id(desc->id, codec, encoder))) {
1490  printf(" %c", get_media_type_char(desc->type));
1491  printf((codec->capabilities & CODEC_CAP_FRAME_THREADS) ? "F" : ".");
1492  printf((codec->capabilities & CODEC_CAP_SLICE_THREADS) ? "S" : ".");
1493  printf((codec->capabilities & CODEC_CAP_EXPERIMENTAL) ? "X" : ".");
1494  printf((codec->capabilities & CODEC_CAP_DRAW_HORIZ_BAND)?"B" : ".");
1495  printf((codec->capabilities & CODEC_CAP_DR1) ? "D" : ".");
1496 
1497  printf(" %-20s %s", codec->name, codec->long_name ? codec->long_name : "");
1498  if (strcmp(codec->name, desc->name))
1499  printf(" (codec %s)", desc->name);
1500 
1501  printf("\n");
1502  }
1503  }
1504  av_free(codecs);
1505 }
1506 
1507 int show_decoders(void *optctx, const char *opt, const char *arg)
1508 {
1509  print_codecs(0);
1510  return 0;
1511 }
1512 
1513 int show_encoders(void *optctx, const char *opt, const char *arg)
1514 {
1515  print_codecs(1);
1516  return 0;
1517 }
1518 
1519 int show_bsfs(void *optctx, const char *opt, const char *arg)
1520 {
1521  AVBitStreamFilter *bsf = NULL;
1522 
1523  printf("Bitstream filters:\n");
1524  while ((bsf = av_bitstream_filter_next(bsf)))
1525  printf("%s\n", bsf->name);
1526  printf("\n");
1527  return 0;
1528 }
1529 
1530 int show_protocols(void *optctx, const char *opt, const char *arg)
1531 {
1532  void *opaque = NULL;
1533  const char *name;
1534 
1535  printf("Supported file protocols:\n"
1536  "Input:\n");
1537  while ((name = avio_enum_protocols(&opaque, 0)))
1538  printf("%s\n", name);
1539  printf("Output:\n");
1540  while ((name = avio_enum_protocols(&opaque, 1)))
1541  printf("%s\n", name);
1542  return 0;
1543 }
1544 
1545 int show_filters(void *optctx, const char *opt, const char *arg)
1546 {
1547 #if CONFIG_AVFILTER
1548  const AVFilter *filter = NULL;
1549  char descr[64], *descr_cur;
1550  int i, j;
1551  const AVFilterPad *pad;
1552 
1553  printf("Filters:\n"
1554  " T.. = Timeline support\n"
1555  " .S. = Slice threading\n"
1556  " ..C = Commmand support\n"
1557  " A = Audio input/output\n"
1558  " V = Video input/output\n"
1559  " N = Dynamic number and/or type of input/output\n"
1560  " | = Source or sink filter\n");
1561  while ((filter = avfilter_next(filter))) {
1562  descr_cur = descr;
1563  for (i = 0; i < 2; i++) {
1564  if (i) {
1565  *(descr_cur++) = '-';
1566  *(descr_cur++) = '>';
1567  }
1568  pad = i ? filter->outputs : filter->inputs;
1569  for (j = 0; pad && pad[j].name; j++) {
1570  if (descr_cur >= descr + sizeof(descr) - 4)
1571  break;
1572  *(descr_cur++) = get_media_type_char(pad[j].type);
1573  }
1574  if (!j)
1575  *(descr_cur++) = ((!i && (filter->flags & AVFILTER_FLAG_DYNAMIC_INPUTS)) ||
1576  ( i && (filter->flags & AVFILTER_FLAG_DYNAMIC_OUTPUTS))) ? 'N' : '|';
1577  }
1578  *descr_cur = 0;
1579  printf(" %c%c%c %-16s %-10s %s\n",
1580  filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE ? 'T' : '.',
1581  filter->flags & AVFILTER_FLAG_SLICE_THREADS ? 'S' : '.',
1582  filter->process_command ? 'C' : '.',
1583  filter->name, descr, filter->description);
1584  }
1585 #else
1586  printf("No filters available: libavfilter disabled\n");
1587 #endif
1588  return 0;
1589 }
1590 
1591 int show_colors(void *optctx, const char *opt, const char *arg)
1592 {
1593  const char *name;
1594  const uint8_t *rgb;
1595  int i;
1596 
1597  printf("%-32s #RRGGBB\n", "name");
1598 
1599  for (i = 0; name = av_get_known_color_name(i, &rgb); i++)
1600  printf("%-32s #%02x%02x%02x\n", name, rgb[0], rgb[1], rgb[2]);
1601 
1602  return 0;
1603 }
1604 
1605 int show_pix_fmts(void *optctx, const char *opt, const char *arg)
1606 {
1607  const AVPixFmtDescriptor *pix_desc = NULL;
1608 
1609  printf("Pixel formats:\n"
1610  "I.... = Supported Input format for conversion\n"
1611  ".O... = Supported Output format for conversion\n"
1612  "..H.. = Hardware accelerated format\n"
1613  "...P. = Paletted format\n"
1614  "....B = Bitstream format\n"
1615  "FLAGS NAME NB_COMPONENTS BITS_PER_PIXEL\n"
1616  "-----\n");
1617 
1618 #if !CONFIG_SWSCALE
1619 # define sws_isSupportedInput(x) 0
1620 # define sws_isSupportedOutput(x) 0
1621 #endif
1622 
1623  while ((pix_desc = av_pix_fmt_desc_next(pix_desc))) {
1624  enum AVPixelFormat pix_fmt = av_pix_fmt_desc_get_id(pix_desc);
1625  printf("%c%c%c%c%c %-16s %d %2d\n",
1626  sws_isSupportedInput (pix_fmt) ? 'I' : '.',
1627  sws_isSupportedOutput(pix_fmt) ? 'O' : '.',
1628  pix_desc->flags & AV_PIX_FMT_FLAG_HWACCEL ? 'H' : '.',
1629  pix_desc->flags & AV_PIX_FMT_FLAG_PAL ? 'P' : '.',
1630  pix_desc->flags & AV_PIX_FMT_FLAG_BITSTREAM ? 'B' : '.',
1631  pix_desc->name,
1632  pix_desc->nb_components,
1633  av_get_bits_per_pixel(pix_desc));
1634  }
1635  return 0;
1636 }
1637 
1638 int show_layouts(void *optctx, const char *opt, const char *arg)
1639 {
1640  int i = 0;
1641  uint64_t layout, j;
1642  const char *name, *descr;
1643 
1644  printf("Individual channels:\n"
1645  "NAME DESCRIPTION\n");
1646  for (i = 0; i < 63; i++) {
1647  name = av_get_channel_name((uint64_t)1 << i);
1648  if (!name)
1649  continue;
1650  descr = av_get_channel_description((uint64_t)1 << i);
1651  printf("%-14s %s\n", name, descr);
1652  }
1653  printf("\nStandard channel layouts:\n"
1654  "NAME DECOMPOSITION\n");
1655  for (i = 0; !av_get_standard_channel_layout(i, &layout, &name); i++) {
1656  if (name) {
1657  printf("%-14s ", name);
1658  for (j = 1; j; j <<= 1)
1659  if ((layout & j))
1660  printf("%s%s", (layout & (j - 1)) ? "+" : "", av_get_channel_name(j));
1661  printf("\n");
1662  }
1663  }
1664  return 0;
1665 }
1666 
1667 int show_sample_fmts(void *optctx, const char *opt, const char *arg)
1668 {
1669  int i;
1670  char fmt_str[128];
1671  for (i = -1; i < AV_SAMPLE_FMT_NB; i++)
1672  printf("%s\n", av_get_sample_fmt_string(fmt_str, sizeof(fmt_str), i));
1673  return 0;
1674 }
1675 
1676 static void show_help_codec(const char *name, int encoder)
1677 {
1678  const AVCodecDescriptor *desc;
1679  const AVCodec *codec;
1680 
1681  if (!name) {
1682  av_log(NULL, AV_LOG_ERROR, "No codec name specified.\n");
1683  return;
1684  }
1685 
1686  codec = encoder ? avcodec_find_encoder_by_name(name) :
1688 
1689  if (codec)
1690  print_codec(codec);
1691  else if ((desc = avcodec_descriptor_get_by_name(name))) {
1692  int printed = 0;
1693 
1694  while ((codec = next_codec_for_id(desc->id, codec, encoder))) {
1695  printed = 1;
1696  print_codec(codec);
1697  }
1698 
1699  if (!printed) {
1700  av_log(NULL, AV_LOG_ERROR, "Codec '%s' is known to FFmpeg, "
1701  "but no %s for it are available. FFmpeg might need to be "
1702  "recompiled with additional external libraries.\n",
1703  name, encoder ? "encoders" : "decoders");
1704  }
1705  } else {
1706  av_log(NULL, AV_LOG_ERROR, "Codec '%s' is not recognized by FFmpeg.\n",
1707  name);
1708  }
1709 }
1710 
1711 static void show_help_demuxer(const char *name)
1712 {
1713  const AVInputFormat *fmt = av_find_input_format(name);
1714 
1715  if (!fmt) {
1716  av_log(NULL, AV_LOG_ERROR, "Unknown format '%s'.\n", name);
1717  return;
1718  }
1719 
1720  printf("Demuxer %s [%s]:\n", fmt->name, fmt->long_name);
1721 
1722  if (fmt->extensions)
1723  printf(" Common extensions: %s.\n", fmt->extensions);
1724 
1725  if (fmt->priv_class)
1727 }
1728 
1729 static void show_help_muxer(const char *name)
1730 {
1731  const AVCodecDescriptor *desc;
1732  const AVOutputFormat *fmt = av_guess_format(name, NULL, NULL);
1733 
1734  if (!fmt) {
1735  av_log(NULL, AV_LOG_ERROR, "Unknown format '%s'.\n", name);
1736  return;
1737  }
1738 
1739  printf("Muxer %s [%s]:\n", fmt->name, fmt->long_name);
1740 
1741  if (fmt->extensions)
1742  printf(" Common extensions: %s.\n", fmt->extensions);
1743  if (fmt->mime_type)
1744  printf(" Mime type: %s.\n", fmt->mime_type);
1745  if (fmt->video_codec != AV_CODEC_ID_NONE &&
1746  (desc = avcodec_descriptor_get(fmt->video_codec))) {
1747  printf(" Default video codec: %s.\n", desc->name);
1748  }
1749  if (fmt->audio_codec != AV_CODEC_ID_NONE &&
1750  (desc = avcodec_descriptor_get(fmt->audio_codec))) {
1751  printf(" Default audio codec: %s.\n", desc->name);
1752  }
1753  if (fmt->subtitle_codec != AV_CODEC_ID_NONE &&
1754  (desc = avcodec_descriptor_get(fmt->subtitle_codec))) {
1755  printf(" Default subtitle codec: %s.\n", desc->name);
1756  }
1757 
1758  if (fmt->priv_class)
1760 }
1761 
1762 #if CONFIG_AVFILTER
1763 static void show_help_filter(const char *name)
1764 {
1765 #if CONFIG_AVFILTER
1766  const AVFilter *f = avfilter_get_by_name(name);
1767  int i, count;
1768 
1769  if (!name) {
1770  av_log(NULL, AV_LOG_ERROR, "No filter name specified.\n");
1771  return;
1772  } else if (!f) {
1773  av_log(NULL, AV_LOG_ERROR, "Unknown filter '%s'.\n", name);
1774  return;
1775  }
1776 
1777  printf("Filter %s\n", f->name);
1778  if (f->description)
1779  printf(" %s\n", f->description);
1780 
1782  printf(" slice threading supported\n");
1783 
1784  printf(" Inputs:\n");
1785  count = avfilter_pad_count(f->inputs);
1786  for (i = 0; i < count; i++) {
1787  printf(" #%d: %s (%s)\n", i, avfilter_pad_get_name(f->inputs, i),
1789  }
1791  printf(" dynamic (depending on the options)\n");
1792  else if (!count)
1793  printf(" none (source filter)\n");
1794 
1795  printf(" Outputs:\n");
1796  count = avfilter_pad_count(f->outputs);
1797  for (i = 0; i < count; i++) {
1798  printf(" #%d: %s (%s)\n", i, avfilter_pad_get_name(f->outputs, i),
1800  }
1802  printf(" dynamic (depending on the options)\n");
1803  else if (!count)
1804  printf(" none (sink filter)\n");
1805 
1806  if (f->priv_class)
1810  printf("This filter has support for timeline through the 'enable' option.\n");
1811 #else
1812  av_log(NULL, AV_LOG_ERROR, "Build without libavfilter; "
1813  "can not to satisfy request\n");
1814 #endif
1815 }
1816 #endif
1817 
1818 int show_help(void *optctx, const char *opt, const char *arg)
1819 {
1820  char *topic, *par;
1822 
1823  topic = av_strdup(arg ? arg : "");
1824  par = strchr(topic, '=');
1825  if (par)
1826  *par++ = 0;
1827 
1828  if (!*topic) {
1829  show_help_default(topic, par);
1830  } else if (!strcmp(topic, "decoder")) {
1831  show_help_codec(par, 0);
1832  } else if (!strcmp(topic, "encoder")) {
1833  show_help_codec(par, 1);
1834  } else if (!strcmp(topic, "demuxer")) {
1835  show_help_demuxer(par);
1836  } else if (!strcmp(topic, "muxer")) {
1837  show_help_muxer(par);
1838 #if CONFIG_AVFILTER
1839  } else if (!strcmp(topic, "filter")) {
1840  show_help_filter(par);
1841 #endif
1842  } else {
1843  show_help_default(topic, par);
1844  }
1845 
1846  av_freep(&topic);
1847  return 0;
1848 }
1849 
1850 int read_yesno(void)
1851 {
1852  int c = getchar();
1853  int yesno = (av_toupper(c) == 'Y');
1854 
1855  while (c != '\n' && c != EOF)
1856  c = getchar();
1857 
1858  return yesno;
1859 }
1860 
1861 int cmdutils_read_file(const char *filename, char **bufptr, size_t *size)
1862 {
1863  int ret;
1864  FILE *f = av_fopen_utf8(filename, "rb");
1865 
1866  if (!f) {
1867  ret = AVERROR(errno);
1868  av_log(NULL, AV_LOG_ERROR, "Cannot read file '%s': %s\n", filename,
1869  strerror(errno));
1870  return ret;
1871  }
1872  fseek(f, 0, SEEK_END);
1873  *size = ftell(f);
1874  fseek(f, 0, SEEK_SET);
1875  if (*size == (size_t)-1) {
1876  ret = AVERROR(errno);
1877  av_log(NULL, AV_LOG_ERROR, "IO error: %s\n", strerror(errno));
1878  fclose(f);
1879  return ret;
1880  }
1881  *bufptr = av_malloc(*size + 1);
1882  if (!*bufptr) {
1883  av_log(NULL, AV_LOG_ERROR, "Could not allocate file buffer\n");
1884  fclose(f);
1885  return AVERROR(ENOMEM);
1886  }
1887  ret = fread(*bufptr, 1, *size, f);
1888  if (ret < *size) {
1889  av_free(*bufptr);
1890  if (ferror(f)) {
1891  ret = AVERROR(errno);
1892  av_log(NULL, AV_LOG_ERROR, "Error while reading file '%s': %s\n",
1893  filename, strerror(errno));
1894  } else
1895  ret = AVERROR_EOF;
1896  } else {
1897  ret = 0;
1898  (*bufptr)[(*size)++] = '\0';
1899  }
1900 
1901  fclose(f);
1902  return ret;
1903 }
1904 
1905 FILE *get_preset_file(char *filename, size_t filename_size,
1906  const char *preset_name, int is_path,
1907  const char *codec_name)
1908 {
1909  FILE *f = NULL;
1910  int i;
1911  const char *base[3] = { getenv("FFMPEG_DATADIR"),
1912  getenv("HOME"),
1913  FFMPEG_DATADIR, };
1914 
1915  if (is_path) {
1916  av_strlcpy(filename, preset_name, filename_size);
1917  f = fopen(filename, "r");
1918  } else {
1919 #ifdef _WIN32
1920  char datadir[MAX_PATH], *ls;
1921  base[2] = NULL;
1922 
1923  if (GetModuleFileNameA(GetModuleHandleA(NULL), datadir, sizeof(datadir) - 1))
1924  {
1925  for (ls = datadir; ls < datadir + strlen(datadir); ls++)
1926  if (*ls == '\\') *ls = '/';
1927 
1928  if (ls = strrchr(datadir, '/'))
1929  {
1930  *ls = 0;
1931  strncat(datadir, "/ffpresets", sizeof(datadir) - 1 - strlen(datadir));
1932  base[2] = datadir;
1933  }
1934  }
1935 #endif
1936  for (i = 0; i < 3 && !f; i++) {
1937  if (!base[i])
1938  continue;
1939  snprintf(filename, filename_size, "%s%s/%s.ffpreset", base[i],
1940  i != 1 ? "" : "/.ffmpeg", preset_name);
1941  f = fopen(filename, "r");
1942  if (!f && codec_name) {
1943  snprintf(filename, filename_size,
1944  "%s%s/%s-%s.ffpreset",
1945  base[i], i != 1 ? "" : "/.ffmpeg", codec_name,
1946  preset_name);
1947  f = fopen(filename, "r");
1948  }
1949  }
1950  }
1951 
1952  return f;
1953 }
1954 
1955 int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
1956 {
1957  int ret = avformat_match_stream_specifier(s, st, spec);
1958  if (ret < 0)
1959  av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
1960  return ret;
1961 }
1962 
1964  AVFormatContext *s, AVStream *st, AVCodec *codec)
1965 {
1966  AVDictionary *ret = NULL;
1967  AVDictionaryEntry *t = NULL;
1970  char prefix = 0;
1971  const AVClass *cc = avcodec_get_class();
1972 
1973  if (!codec)
1974  codec = s->oformat ? avcodec_find_encoder(codec_id)
1975  : avcodec_find_decoder(codec_id);
1976 
1977  switch (st->codec->codec_type) {
1978  case AVMEDIA_TYPE_VIDEO:
1979  prefix = 'v';
1980  flags |= AV_OPT_FLAG_VIDEO_PARAM;
1981  break;
1982  case AVMEDIA_TYPE_AUDIO:
1983  prefix = 'a';
1984  flags |= AV_OPT_FLAG_AUDIO_PARAM;
1985  break;
1986  case AVMEDIA_TYPE_SUBTITLE:
1987  prefix = 's';
1988  flags |= AV_OPT_FLAG_SUBTITLE_PARAM;
1989  break;
1990  }
1991 
1992  while (t = av_dict_get(opts, "", t, AV_DICT_IGNORE_SUFFIX)) {
1993  char *p = strchr(t->key, ':');
1994 
1995  /* check stream specification in opt name */
1996  if (p)
1997  switch (check_stream_specifier(s, st, p + 1)) {
1998  case 1: *p = 0; break;
1999  case 0: continue;
2000  default: return NULL;
2001  }
2002 
2003  if (av_opt_find(&cc, t->key, NULL, flags, AV_OPT_SEARCH_FAKE_OBJ) ||
2004  !codec ||
2005  (codec->priv_class &&
2006  av_opt_find(&codec->priv_class, t->key, NULL, flags,
2008  av_dict_set(&ret, t->key, t->value, 0);
2009  else if (t->key[0] == prefix &&
2010  av_opt_find(&cc, t->key + 1, NULL, flags,
2012  av_dict_set(&ret, t->key + 1, t->value, 0);
2013 
2014  if (p)
2015  *p = ':';
2016  }
2017  return ret;
2018 }
2019 
2021  AVDictionary *codec_opts)
2022 {
2023  int i;
2024  AVDictionary **opts;
2025 
2026  if (!s->nb_streams)
2027  return NULL;
2028  opts = av_mallocz_array(s->nb_streams, sizeof(*opts));
2029  if (!opts) {
2030  av_log(NULL, AV_LOG_ERROR,
2031  "Could not alloc memory for stream options.\n");
2032  return NULL;
2033  }
2034  for (i = 0; i < s->nb_streams; i++)
2035  opts[i] = filter_codec_opts(codec_opts, s->streams[i]->codec->codec_id,
2036  s, s->streams[i], NULL);
2037  return opts;
2038 }
2039 
2040 void *grow_array(void *array, int elem_size, int *size, int new_size)
2041 {
2042  if (new_size >= INT_MAX / elem_size) {
2043  av_log(NULL, AV_LOG_ERROR, "Array too big.\n");
2044  exit_program(1);
2045  }
2046  if (*size < new_size) {
2047  uint8_t *tmp = av_realloc(array, new_size*elem_size);
2048  if (!tmp) {
2049  av_log(NULL, AV_LOG_ERROR, "Could not alloc buffer.\n");
2050  exit_program(1);
2051  }
2052  memset(tmp + *size*elem_size, 0, (new_size-*size) * elem_size);
2053  *size = new_size;
2054  return tmp;
2055  }
2056  return array;
2057 }
2058 
2059 #if CONFIG_AVDEVICE
2060 static int print_device_sources(AVInputFormat *fmt, AVDictionary *opts)
2061 {
2062  int ret, i;
2063  AVFormatContext *dev = NULL;
2064  AVDeviceInfoList *device_list = NULL;
2065  AVDictionary *tmp_opts = NULL;
2066 
2067  if (!fmt || !fmt->priv_class || !AV_IS_INPUT_DEVICE(fmt->priv_class->category))
2068  return AVERROR(EINVAL);
2069 
2070  printf("Audo-detected sources for %s:\n", fmt->name);
2071  if (!fmt->get_device_list) {
2072  ret = AVERROR(ENOSYS);
2073  printf("Cannot list sources. Not implemented.\n");
2074  goto fail;
2075  }
2076 
2077  /* TODO: avformat_open_input calls read_header callback which is not necessary.
2078  Function like avformat_alloc_output_context2 for input could be helpful here. */
2079  av_dict_copy(&tmp_opts, opts, 0);
2080  if ((ret = avformat_open_input(&dev, NULL, fmt, &tmp_opts)) < 0) {
2081  printf("Cannot open device: %s.\n", fmt->name);
2082  goto fail;
2083  }
2084 
2085  if ((ret = avdevice_list_devices(dev, &device_list)) < 0) {
2086  printf("Cannot list sources.\n");
2087  goto fail;
2088  }
2089 
2090  for (i = 0; i < device_list->nb_devices; i++) {
2091  printf("%s %s [%s]\n", device_list->default_device == i ? "*" : " ",
2092  device_list->devices[i]->device_name, device_list->devices[i]->device_description);
2093  }
2094 
2095  fail:
2096  av_dict_free(&tmp_opts);
2097  avdevice_free_list_devices(&device_list);
2098  avformat_close_input(&dev);
2099  return ret;
2100 }
2101 
2102 static int print_device_sinks(AVOutputFormat *fmt, AVDictionary *opts)
2103 {
2104  int ret, i;
2105  AVFormatContext *dev = NULL;
2106  AVDeviceInfoList *device_list = NULL;
2107  AVDictionary *tmp_opts = NULL;
2108 
2109  if (!fmt || !fmt->priv_class || !AV_IS_OUTPUT_DEVICE(fmt->priv_class->category))
2110  return AVERROR(EINVAL);
2111 
2112  printf("Audo-detected sinks for %s:\n", fmt->name);
2113  if (!fmt->get_device_list) {
2114  ret = AVERROR(ENOSYS);
2115  printf("Cannot list sinks. Not implemented.\n");
2116  goto fail;
2117  }
2118 
2119  if ((ret = avformat_alloc_output_context2(&dev, fmt, NULL, NULL)) < 0) {
2120  printf("Cannot open device: %s.\n", fmt->name);
2121  goto fail;
2122  }
2123  av_dict_copy(&tmp_opts, opts, 0);
2124  av_opt_set_dict2(dev, &tmp_opts, AV_OPT_SEARCH_CHILDREN);
2125 
2126  if ((ret = avdevice_list_devices(dev, &device_list)) < 0) {
2127  printf("Cannot list sinks.\n");
2128  goto fail;
2129  }
2130 
2131  for (i = 0; i < device_list->nb_devices; i++) {
2132  printf("%s %s [%s]\n", device_list->default_device == i ? "*" : " ",
2133  device_list->devices[i]->device_name, device_list->devices[i]->device_description);
2134  }
2135 
2136  fail:
2137  av_dict_free(&tmp_opts);
2138  avdevice_free_list_devices(&device_list);
2139  avformat_free_context(dev);
2140  return ret;
2141 }
2142 
2143 static int show_sinks_sources_parse_arg(const char *arg, char **dev, AVDictionary **opts)
2144 {
2145  int ret;
2146  if (arg) {
2147  char *opts_str = NULL;
2148  av_assert0(dev && opts);
2149  *dev = av_strdup(arg);
2150  if (!*dev)
2151  return AVERROR(ENOMEM);
2152  if ((opts_str = strchr(*dev, ','))) {
2153  *(opts_str++) = '\0';
2154  if (opts_str[0] && ((ret = av_dict_parse_string(opts, opts_str, "=", ":", 0)) < 0)) {
2155  av_freep(dev);
2156  return ret;
2157  }
2158  }
2159  } else
2160  printf("\nDevice name is not provided.\n"
2161  "You can pass devicename[,opt1=val1[,opt2=val2...]] as an argument.\n\n");
2162  return 0;
2163 }
2164 
2165 int show_sources(void *optctx, const char *opt, const char *arg)
2166 {
2167  AVInputFormat *fmt = NULL;
2168  char *dev = NULL;
2169  AVDictionary *opts = NULL;
2170  int ret = 0;
2171  int error_level = av_log_get_level();
2172 
2174 
2175  if ((ret = show_sinks_sources_parse_arg(arg, &dev, &opts)) < 0)
2176  goto fail;
2177 
2178  do {
2179  fmt = av_input_audio_device_next(fmt);
2180  if (fmt) {
2181  if (!strcmp(fmt->name, "lavfi"))
2182  continue; //it's pointless to probe lavfi
2183  if (dev && strcmp(fmt->name, dev))
2184  continue;
2185  print_device_sources(fmt, opts);
2186  }
2187  } while (fmt);
2188  do {
2189  fmt = av_input_video_device_next(fmt);
2190  if (fmt) {
2191  if (dev && strcmp(fmt->name, dev))
2192  continue;
2193  print_device_sources(fmt, opts);
2194  }
2195  } while (fmt);
2196  fail:
2197  av_dict_free(&opts);
2198  av_free(dev);
2199  av_log_set_level(error_level);
2200  return ret;
2201 }
2202 
2203 int show_sinks(void *optctx, const char *opt, const char *arg)
2204 {
2205  AVOutputFormat *fmt = NULL;
2206  char *dev = NULL;
2207  AVDictionary *opts = NULL;
2208  int ret = 0;
2209  int error_level = av_log_get_level();
2210 
2212 
2213  if ((ret = show_sinks_sources_parse_arg(arg, &dev, &opts)) < 0)
2214  goto fail;
2215 
2216  do {
2217  fmt = av_output_audio_device_next(fmt);
2218  if (fmt) {
2219  if (dev && strcmp(fmt->name, dev))
2220  continue;
2221  print_device_sinks(fmt, opts);
2222  }
2223  } while (fmt);
2224  do {
2225  fmt = av_output_video_device_next(fmt);
2226  if (fmt) {
2227  if (dev && strcmp(fmt->name, dev))
2228  continue;
2229  print_device_sinks(fmt, opts);
2230  }
2231  } while (fmt);
2232  fail:
2233  av_dict_free(&opts);
2234  av_free(dev);
2235  av_log_set_level(error_level);
2236  return ret;
2237 }
2238 #endif