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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"
37 #include "libavresample/avresample.h"
38 #include "libswscale/swscale.h"
39 #include "libswresample/swresample.h"
40 #include "libpostproc/postprocess.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 
64 struct SwsContext *sws_opts;
65 AVDictionary *swr_opts;
66 AVDictionary *format_opts, *codec_opts, *resample_opts;
67 
68 static FILE *report_file;
69 static int report_file_level = AV_LOG_DEBUG;
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  char *str;
294 
295  dstcount = (int *)(so + 1);
296  *so = grow_array(*so, sizeof(**so), dstcount, *dstcount + 1);
297  str = av_strdup(p ? p + 1 : "");
298  if (!str)
299  return AVERROR(ENOMEM);
300  (*so)[*dstcount - 1].specifier = str;
301  dst = &(*so)[*dstcount - 1].u;
302  }
303 
304  if (po->flags & OPT_STRING) {
305  char *str;
306  str = av_strdup(arg);
307  av_freep(dst);
308  if (!str)
309  return AVERROR(ENOMEM);
310  *(char **)dst = str;
311  } else if (po->flags & OPT_BOOL || po->flags & OPT_INT) {
312  *(int *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT_MIN, INT_MAX);
313  } else if (po->flags & OPT_INT64) {
314  *(int64_t *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT64_MIN, INT64_MAX);
315  } else if (po->flags & OPT_TIME) {
316  *(int64_t *)dst = parse_time_or_die(opt, arg, 1);
317  } else if (po->flags & OPT_FLOAT) {
318  *(float *)dst = parse_number_or_die(opt, arg, OPT_FLOAT, -INFINITY, INFINITY);
319  } else if (po->flags & OPT_DOUBLE) {
320  *(double *)dst = parse_number_or_die(opt, arg, OPT_DOUBLE, -INFINITY, INFINITY);
321  } else if (po->u.func_arg) {
322  int ret = po->u.func_arg(optctx, opt, arg);
323  if (ret < 0) {
324  av_log(NULL, AV_LOG_ERROR,
325  "Failed to set value '%s' for option '%s': %s\n",
326  arg, opt, av_err2str(ret));
327  return ret;
328  }
329  }
330  if (po->flags & OPT_EXIT)
331  exit_program(0);
332 
333  return 0;
334 }
335 
336 int parse_option(void *optctx, const char *opt, const char *arg,
337  const OptionDef *options)
338 {
339  const OptionDef *po;
340  int ret;
341 
342  po = find_option(options, opt);
343  if (!po->name && opt[0] == 'n' && opt[1] == 'o') {
344  /* handle 'no' bool option */
345  po = find_option(options, opt + 2);
346  if ((po->name && (po->flags & OPT_BOOL)))
347  arg = "0";
348  } else if (po->flags & OPT_BOOL)
349  arg = "1";
350 
351  if (!po->name)
352  po = find_option(options, "default");
353  if (!po->name) {
354  av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'\n", opt);
355  return AVERROR(EINVAL);
356  }
357  if (po->flags & HAS_ARG && !arg) {
358  av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'\n", opt);
359  return AVERROR(EINVAL);
360  }
361 
362  ret = write_option(optctx, po, opt, arg);
363  if (ret < 0)
364  return ret;
365 
366  return !!(po->flags & HAS_ARG);
367 }
368 
369 void parse_options(void *optctx, int argc, char **argv, const OptionDef *options,
370  void (*parse_arg_function)(void *, const char*))
371 {
372  const char *opt;
373  int optindex, handleoptions = 1, ret;
374 
375  /* perform system-dependent conversions for arguments list */
376  prepare_app_arguments(&argc, &argv);
377 
378  /* parse options */
379  optindex = 1;
380  while (optindex < argc) {
381  opt = argv[optindex++];
382 
383  if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
384  if (opt[1] == '-' && opt[2] == '\0') {
385  handleoptions = 0;
386  continue;
387  }
388  opt++;
389 
390  if ((ret = parse_option(optctx, opt, argv[optindex], options)) < 0)
391  exit_program(1);
392  optindex += ret;
393  } else {
394  if (parse_arg_function)
395  parse_arg_function(optctx, opt);
396  }
397  }
398 }
399 
400 int parse_optgroup(void *optctx, OptionGroup *g)
401 {
402  int i, ret;
403 
404  av_log(NULL, AV_LOG_DEBUG, "Parsing a group of options: %s %s.\n",
405  g->group_def->name, g->arg);
406 
407  for (i = 0; i < g->nb_opts; i++) {
408  Option *o = &g->opts[i];
409 
410  if (g->group_def->flags &&
411  !(g->group_def->flags & o->opt->flags)) {
412  av_log(NULL, AV_LOG_ERROR, "Option %s (%s) cannot be applied to "
413  "%s %s -- you are trying to apply an input option to an "
414  "output file or vice versa. Move this option before the "
415  "file it belongs to.\n", o->key, o->opt->help,
416  g->group_def->name, g->arg);
417  return AVERROR(EINVAL);
418  }
419 
420  av_log(NULL, AV_LOG_DEBUG, "Applying option %s (%s) with argument %s.\n",
421  o->key, o->opt->help, o->val);
422 
423  ret = write_option(optctx, o->opt, o->key, o->val);
424  if (ret < 0)
425  return ret;
426  }
427 
428  av_log(NULL, AV_LOG_DEBUG, "Successfully parsed a group of options.\n");
429 
430  return 0;
431 }
432 
433 int locate_option(int argc, char **argv, const OptionDef *options,
434  const char *optname)
435 {
436  const OptionDef *po;
437  int i;
438 
439  for (i = 1; i < argc; i++) {
440  const char *cur_opt = argv[i];
441 
442  if (*cur_opt++ != '-')
443  continue;
444 
445  po = find_option(options, cur_opt);
446  if (!po->name && cur_opt[0] == 'n' && cur_opt[1] == 'o')
447  po = find_option(options, cur_opt + 2);
448 
449  if ((!po->name && !strcmp(cur_opt, optname)) ||
450  (po->name && !strcmp(optname, po->name)))
451  return i;
452 
453  if (!po->name || po->flags & HAS_ARG)
454  i++;
455  }
456  return 0;
457 }
458 
459 static void dump_argument(const char *a)
460 {
461  const unsigned char *p;
462 
463  for (p = a; *p; p++)
464  if (!((*p >= '+' && *p <= ':') || (*p >= '@' && *p <= 'Z') ||
465  *p == '_' || (*p >= 'a' && *p <= 'z')))
466  break;
467  if (!*p) {
468  fputs(a, report_file);
469  return;
470  }
471  fputc('"', report_file);
472  for (p = a; *p; p++) {
473  if (*p == '\\' || *p == '"' || *p == '$' || *p == '`')
474  fprintf(report_file, "\\%c", *p);
475  else if (*p < ' ' || *p > '~')
476  fprintf(report_file, "\\x%02x", *p);
477  else
478  fputc(*p, report_file);
479  }
480  fputc('"', report_file);
481 }
482 
483 void parse_loglevel(int argc, char **argv, const OptionDef *options)
484 {
485  int idx = locate_option(argc, argv, options, "loglevel");
486  const char *env;
487  if (!idx)
488  idx = locate_option(argc, argv, options, "v");
489  if (idx && argv[idx + 1])
490  opt_loglevel(NULL, "loglevel", argv[idx + 1]);
491  idx = locate_option(argc, argv, options, "report");
492  if ((env = getenv("FFREPORT")) || idx) {
493  init_report(env);
494  if (report_file) {
495  int i;
496  fprintf(report_file, "Command line:\n");
497  for (i = 0; i < argc; i++) {
498  dump_argument(argv[i]);
499  fputc(i < argc - 1 ? ' ' : '\n', report_file);
500  }
501  fflush(report_file);
502  }
503  }
504  idx = locate_option(argc, argv, options, "hide_banner");
505  if (idx)
506  hide_banner = 1;
507 }
508 
509 static const AVOption *opt_find(void *obj, const char *name, const char *unit,
510  int opt_flags, int search_flags)
511 {
512  const AVOption *o = av_opt_find(obj, name, unit, opt_flags, search_flags);
513  if(o && !o->flags)
514  return NULL;
515  return o;
516 }
517 
518 #define FLAGS (o->type == AV_OPT_TYPE_FLAGS) ? AV_DICT_APPEND : 0
519 int opt_default(void *optctx, const char *opt, const char *arg)
520 {
521  const AVOption *o;
522  int consumed = 0;
523  char opt_stripped[128];
524  const char *p;
525  const AVClass *cc = avcodec_get_class(), *fc = avformat_get_class();
526 #if CONFIG_AVRESAMPLE
527  const AVClass *rc = avresample_get_class();
528 #endif
529  const AVClass *sc, *swr_class;
530 
531  if (!strcmp(opt, "debug") || !strcmp(opt, "fdebug"))
532  av_log_set_level(AV_LOG_DEBUG);
533 
534  if (!(p = strchr(opt, ':')))
535  p = opt + strlen(opt);
536  av_strlcpy(opt_stripped, opt, FFMIN(sizeof(opt_stripped), p - opt + 1));
537 
538  if ((o = opt_find(&cc, opt_stripped, NULL, 0,
539  AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) ||
540  ((opt[0] == 'v' || opt[0] == 'a' || opt[0] == 's') &&
541  (o = opt_find(&cc, opt + 1, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ)))) {
542  av_dict_set(&codec_opts, opt, arg, FLAGS);
543  consumed = 1;
544  }
545  if ((o = opt_find(&fc, opt, NULL, 0,
546  AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
547  av_dict_set(&format_opts, opt, arg, FLAGS);
548  if (consumed)
549  av_log(NULL, AV_LOG_VERBOSE, "Routing option %s to both codec and muxer layer\n", opt);
550  consumed = 1;
551  }
552 #if CONFIG_SWSCALE
553  sc = sws_get_class();
554  if (!consumed && opt_find(&sc, opt, NULL, 0,
555  AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) {
556  // XXX we only support sws_flags, not arbitrary sws options
557  int ret = av_opt_set(sws_opts, opt, arg, 0);
558  if (ret < 0) {
559  av_log(NULL, AV_LOG_ERROR, "Error setting option %s.\n", opt);
560  return ret;
561  }
562  consumed = 1;
563  }
564 #else
565  if (!consumed && !strcmp(opt, "sws_flags")) {
566  av_log(NULL, AV_LOG_WARNING, "Ignoring %s %s, due to disabled swscale\n", opt, arg);
567  consumed = 1;
568  }
569 #endif
570 #if CONFIG_SWRESAMPLE
571  swr_class = swr_get_class();
572  if (!consumed && (o=opt_find(&swr_class, opt, NULL, 0,
573  AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
574  struct SwrContext *swr = swr_alloc();
575  int ret = av_opt_set(swr, opt, arg, 0);
576  swr_free(&swr);
577  if (ret < 0) {
578  av_log(NULL, AV_LOG_ERROR, "Error setting option %s.\n", opt);
579  return ret;
580  }
581  av_dict_set(&swr_opts, opt, arg, FLAGS);
582  consumed = 1;
583  }
584 #endif
585 #if CONFIG_AVRESAMPLE
586  if ((o=opt_find(&rc, opt, NULL, 0,
587  AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
588  av_dict_set(&resample_opts, opt, arg, FLAGS);
589  consumed = 1;
590  }
591 #endif
592 
593  if (consumed)
594  return 0;
595  return AVERROR_OPTION_NOT_FOUND;
596 }
597 
598 /*
599  * Check whether given option is a group separator.
600  *
601  * @return index of the group definition that matched or -1 if none
602  */
603 static int match_group_separator(const OptionGroupDef *groups, int nb_groups,
604  const char *opt)
605 {
606  int i;
607 
608  for (i = 0; i < nb_groups; i++) {
609  const OptionGroupDef *p = &groups[i];
610  if (p->sep && !strcmp(p->sep, opt))
611  return i;
612  }
613 
614  return -1;
615 }
616 
617 /*
618  * Finish parsing an option group.
619  *
620  * @param group_idx which group definition should this group belong to
621  * @param arg argument of the group delimiting option
622  */
623 static void finish_group(OptionParseContext *octx, int group_idx,
624  const char *arg)
625 {
626  OptionGroupList *l = &octx->groups[group_idx];
627  OptionGroup *g;
628 
629  GROW_ARRAY(l->groups, l->nb_groups);
630  g = &l->groups[l->nb_groups - 1];
631 
632  *g = octx->cur_group;
633  g->arg = arg;
634  g->group_def = l->group_def;
635 #if CONFIG_SWSCALE
636  g->sws_opts = sws_opts;
637 #endif
638  g->swr_opts = swr_opts;
639  g->codec_opts = codec_opts;
640  g->format_opts = format_opts;
641  g->resample_opts = resample_opts;
642 
643  codec_opts = NULL;
644  format_opts = NULL;
645  resample_opts = NULL;
646 #if CONFIG_SWSCALE
647  sws_opts = NULL;
648 #endif
649  swr_opts = NULL;
650  init_opts();
651 
652  memset(&octx->cur_group, 0, sizeof(octx->cur_group));
653 }
654 
655 /*
656  * Add an option instance to currently parsed group.
657  */
658 static void add_opt(OptionParseContext *octx, const OptionDef *opt,
659  const char *key, const char *val)
660 {
661  int global = !(opt->flags & (OPT_PERFILE | OPT_SPEC | OPT_OFFSET));
662  OptionGroup *g = global ? &octx->global_opts : &octx->cur_group;
663 
664  GROW_ARRAY(g->opts, g->nb_opts);
665  g->opts[g->nb_opts - 1].opt = opt;
666  g->opts[g->nb_opts - 1].key = key;
667  g->opts[g->nb_opts - 1].val = val;
668 }
669 
670 static void init_parse_context(OptionParseContext *octx,
671  const OptionGroupDef *groups, int nb_groups)
672 {
673  static const OptionGroupDef global_group = { "global" };
674  int i;
675 
676  memset(octx, 0, sizeof(*octx));
677 
678  octx->nb_groups = nb_groups;
679  octx->groups = av_mallocz_array(octx->nb_groups, sizeof(*octx->groups));
680  if (!octx->groups)
681  exit_program(1);
682 
683  for (i = 0; i < octx->nb_groups; i++)
684  octx->groups[i].group_def = &groups[i];
685 
686  octx->global_opts.group_def = &global_group;
687  octx->global_opts.arg = "";
688 
689  init_opts();
690 }
691 
692 void uninit_parse_context(OptionParseContext *octx)
693 {
694  int i, j;
695 
696  for (i = 0; i < octx->nb_groups; i++) {
697  OptionGroupList *l = &octx->groups[i];
698 
699  for (j = 0; j < l->nb_groups; j++) {
700  av_freep(&l->groups[j].opts);
701  av_dict_free(&l->groups[j].codec_opts);
702  av_dict_free(&l->groups[j].format_opts);
703  av_dict_free(&l->groups[j].resample_opts);
704 #if CONFIG_SWSCALE
705  sws_freeContext(l->groups[j].sws_opts);
706 #endif
707  av_dict_free(&l->groups[j].swr_opts);
708  }
709  av_freep(&l->groups);
710  }
711  av_freep(&octx->groups);
712 
713  av_freep(&octx->cur_group.opts);
714  av_freep(&octx->global_opts.opts);
715 
716  uninit_opts();
717 }
718 
719 int split_commandline(OptionParseContext *octx, int argc, char *argv[],
720  const OptionDef *options,
721  const OptionGroupDef *groups, int nb_groups)
722 {
723  int optindex = 1;
724  int dashdash = -2;
725 
726  /* perform system-dependent conversions for arguments list */
727  prepare_app_arguments(&argc, &argv);
728 
729  init_parse_context(octx, groups, nb_groups);
730  av_log(NULL, AV_LOG_DEBUG, "Splitting the commandline.\n");
731 
732  while (optindex < argc) {
733  const char *opt = argv[optindex++], *arg;
734  const OptionDef *po;
735  int ret;
736 
737  av_log(NULL, AV_LOG_DEBUG, "Reading option '%s' ...", opt);
738 
739  if (opt[0] == '-' && opt[1] == '-' && !opt[2]) {
740  dashdash = optindex;
741  continue;
742  }
743  /* unnamed group separators, e.g. output filename */
744  if (opt[0] != '-' || !opt[1] || dashdash+1 == optindex) {
745  finish_group(octx, 0, opt);
746  av_log(NULL, AV_LOG_DEBUG, " matched as %s.\n", groups[0].name);
747  continue;
748  }
749  opt++;
750 
751 #define GET_ARG(arg) \
752 do { \
753  arg = argv[optindex++]; \
754  if (!arg) { \
755  av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'.\n", opt);\
756  return AVERROR(EINVAL); \
757  } \
758 } while (0)
759 
760  /* named group separators, e.g. -i */
761  if ((ret = match_group_separator(groups, nb_groups, opt)) >= 0) {
762  GET_ARG(arg);
763  finish_group(octx, ret, arg);
764  av_log(NULL, AV_LOG_DEBUG, " matched as %s with argument '%s'.\n",
765  groups[ret].name, arg);
766  continue;
767  }
768 
769  /* normal options */
770  po = find_option(options, opt);
771  if (po->name) {
772  if (po->flags & OPT_EXIT) {
773  /* optional argument, e.g. -h */
774  arg = argv[optindex++];
775  } else if (po->flags & HAS_ARG) {
776  GET_ARG(arg);
777  } else {
778  arg = "1";
779  }
780 
781  add_opt(octx, po, opt, arg);
782  av_log(NULL, AV_LOG_DEBUG, " matched as option '%s' (%s) with "
783  "argument '%s'.\n", po->name, po->help, arg);
784  continue;
785  }
786 
787  /* AVOptions */
788  if (argv[optindex]) {
789  ret = opt_default(NULL, opt, argv[optindex]);
790  if (ret >= 0) {
791  av_log(NULL, AV_LOG_DEBUG, " matched as AVOption '%s' with "
792  "argument '%s'.\n", opt, argv[optindex]);
793  optindex++;
794  continue;
795  } else if (ret != AVERROR_OPTION_NOT_FOUND) {
796  av_log(NULL, AV_LOG_ERROR, "Error parsing option '%s' "
797  "with argument '%s'.\n", opt, argv[optindex]);
798  return ret;
799  }
800  }
801 
802  /* boolean -nofoo options */
803  if (opt[0] == 'n' && opt[1] == 'o' &&
804  (po = find_option(options, opt + 2)) &&
805  po->name && po->flags & OPT_BOOL) {
806  add_opt(octx, po, opt, "0");
807  av_log(NULL, AV_LOG_DEBUG, " matched as option '%s' (%s) with "
808  "argument 0.\n", po->name, po->help);
809  continue;
810  }
811 
812  av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'.\n", opt);
813  return AVERROR_OPTION_NOT_FOUND;
814  }
815 
816  if (octx->cur_group.nb_opts || codec_opts || format_opts || resample_opts)
817  av_log(NULL, AV_LOG_WARNING, "Trailing options were found on the "
818  "commandline.\n");
819 
820  av_log(NULL, AV_LOG_DEBUG, "Finished splitting the commandline.\n");
821 
822  return 0;
823 }
824 
825 int opt_cpuflags(void *optctx, const char *opt, const char *arg)
826 {
827  int ret;
828  unsigned flags = av_get_cpu_flags();
829 
830  if ((ret = av_parse_cpu_caps(&flags, arg)) < 0)
831  return ret;
832 
833  av_force_cpu_flags(flags);
834  return 0;
835 }
836 
837 int opt_loglevel(void *optctx, const char *opt, const char *arg)
838 {
839  const struct { const char *name; int level; } log_levels[] = {
840  { "quiet" , AV_LOG_QUIET },
841  { "panic" , AV_LOG_PANIC },
842  { "fatal" , AV_LOG_FATAL },
843  { "error" , AV_LOG_ERROR },
844  { "warning", AV_LOG_WARNING },
845  { "info" , AV_LOG_INFO },
846  { "verbose", AV_LOG_VERBOSE },
847  { "debug" , AV_LOG_DEBUG },
848  };
849  char *tail;
850  int level;
851  int flags;
852  int i;
853 
854  flags = av_log_get_flags();
855  tail = strstr(arg, "repeat");
856  if (tail)
857  flags &= ~AV_LOG_SKIP_REPEATED;
858  else
859  flags |= AV_LOG_SKIP_REPEATED;
860 
861  av_log_set_flags(flags);
862  if (tail == arg)
863  arg += 6 + (arg[6]=='+');
864  if(tail && !*arg)
865  return 0;
866 
867  for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++) {
868  if (!strcmp(log_levels[i].name, arg)) {
869  av_log_set_level(log_levels[i].level);
870  return 0;
871  }
872  }
873 
874  level = strtol(arg, &tail, 10);
875  if (*tail) {
876  av_log(NULL, AV_LOG_FATAL, "Invalid loglevel \"%s\". "
877  "Possible levels are numbers or:\n", arg);
878  for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++)
879  av_log(NULL, AV_LOG_FATAL, "\"%s\"\n", log_levels[i].name);
880  exit_program(1);
881  }
882  av_log_set_level(level);
883  return 0;
884 }
885 
886 static void expand_filename_template(AVBPrint *bp, const char *template,
887  struct tm *tm)
888 {
889  int c;
890 
891  while ((c = *(template++))) {
892  if (c == '%') {
893  if (!(c = *(template++)))
894  break;
895  switch (c) {
896  case 'p':
897  av_bprintf(bp, "%s", program_name);
898  break;
899  case 't':
900  av_bprintf(bp, "%04d%02d%02d-%02d%02d%02d",
901  tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
902  tm->tm_hour, tm->tm_min, tm->tm_sec);
903  break;
904  case '%':
905  av_bprint_chars(bp, c, 1);
906  break;
907  }
908  } else {
909  av_bprint_chars(bp, c, 1);
910  }
911  }
912 }
913 
914 static int init_report(const char *env)
915 {
916  char *filename_template = NULL;
917  char *key, *val;
918  int ret, count = 0;
919  time_t now;
920  struct tm *tm;
921  AVBPrint filename;
922 
923  if (report_file) /* already opened */
924  return 0;
925  time(&now);
926  tm = localtime(&now);
927 
928  while (env && *env) {
929  if ((ret = av_opt_get_key_value(&env, "=", ":", 0, &key, &val)) < 0) {
930  if (count)
931  av_log(NULL, AV_LOG_ERROR,
932  "Failed to parse FFREPORT environment variable: %s\n",
933  av_err2str(ret));
934  break;
935  }
936  if (*env)
937  env++;
938  count++;
939  if (!strcmp(key, "file")) {
940  av_free(filename_template);
941  filename_template = val;
942  val = NULL;
943  } else if (!strcmp(key, "level")) {
944  char *tail;
945  report_file_level = strtol(val, &tail, 10);
946  if (*tail) {
947  av_log(NULL, AV_LOG_FATAL, "Invalid report file level\n");
948  exit_program(1);
949  }
950  } else {
951  av_log(NULL, AV_LOG_ERROR, "Unknown key '%s' in FFREPORT\n", key);
952  }
953  av_free(val);
954  av_free(key);
955  }
956 
957  av_bprint_init(&filename, 0, 1);
958  expand_filename_template(&filename,
959  av_x_if_null(filename_template, "%p-%t.log"), tm);
960  av_free(filename_template);
961  if (!av_bprint_is_complete(&filename)) {
962  av_log(NULL, AV_LOG_ERROR, "Out of memory building report file name\n");
963  return AVERROR(ENOMEM);
964  }
965 
966  report_file = fopen(filename.str, "w");
967  if (!report_file) {
968  int ret = AVERROR(errno);
969  av_log(NULL, AV_LOG_ERROR, "Failed to open report \"%s\": %s\n",
970  filename.str, strerror(errno));
971  return ret;
972  }
973  av_log_set_callback(log_callback_report);
974  av_log(NULL, AV_LOG_INFO,
975  "%s started on %04d-%02d-%02d at %02d:%02d:%02d\n"
976  "Report written to \"%s\"\n",
977  program_name,
978  tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
979  tm->tm_hour, tm->tm_min, tm->tm_sec,
980  filename.str);
981  av_bprint_finalize(&filename, NULL);
982  return 0;
983 }
984 
985 int opt_report(const char *opt)
986 {
987  return init_report(NULL);
988 }
989 
990 int opt_max_alloc(void *optctx, const char *opt, const char *arg)
991 {
992  char *tail;
993  size_t max;
994 
995  max = strtol(arg, &tail, 10);
996  if (*tail) {
997  av_log(NULL, AV_LOG_FATAL, "Invalid max_alloc \"%s\".\n", arg);
998  exit_program(1);
999  }
1000  av_max_alloc(max);
1001  return 0;
1002 }
1003 
1004 int opt_timelimit(void *optctx, const char *opt, const char *arg)
1005 {
1006 #if HAVE_SETRLIMIT
1007  int lim = parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
1008  struct rlimit rl = { lim, lim + 1 };
1009  if (setrlimit(RLIMIT_CPU, &rl))
1010  perror("setrlimit");
1011 #else
1012  av_log(NULL, AV_LOG_WARNING, "-%s not implemented on this OS\n", opt);
1013 #endif
1014  return 0;
1015 }
1016 
1017 void print_error(const char *filename, int err)
1018 {
1019  char errbuf[128];
1020  const char *errbuf_ptr = errbuf;
1021 
1022  if (av_strerror(err, errbuf, sizeof(errbuf)) < 0)
1023  errbuf_ptr = strerror(AVUNERROR(err));
1024  av_log(NULL, AV_LOG_ERROR, "%s: %s\n", filename, errbuf_ptr);
1025 }
1026 
1027 static int warned_cfg = 0;
1028 
1029 #define INDENT 1
1030 #define SHOW_VERSION 2
1031 #define SHOW_CONFIG 4
1032 #define SHOW_COPYRIGHT 8
1033 
1034 #define PRINT_LIB_INFO(libname, LIBNAME, flags, level) \
1035  if (CONFIG_##LIBNAME) { \
1036  const char *indent = flags & INDENT? " " : ""; \
1037  if (flags & SHOW_VERSION) { \
1038  unsigned int version = libname##_version(); \
1039  av_log(NULL, level, \
1040  "%slib%-11s %2d.%3d.%3d / %2d.%3d.%3d\n", \
1041  indent, #libname, \
1042  LIB##LIBNAME##_VERSION_MAJOR, \
1043  LIB##LIBNAME##_VERSION_MINOR, \
1044  LIB##LIBNAME##_VERSION_MICRO, \
1045  version >> 16, version >> 8 & 0xff, version & 0xff); \
1046  } \
1047  if (flags & SHOW_CONFIG) { \
1048  const char *cfg = libname##_configuration(); \
1049  if (strcmp(FFMPEG_CONFIGURATION, cfg)) { \
1050  if (!warned_cfg) { \
1051  av_log(NULL, level, \
1052  "%sWARNING: library configuration mismatch\n", \
1053  indent); \
1054  warned_cfg = 1; \
1055  } \
1056  av_log(NULL, level, "%s%-11s configuration: %s\n", \
1057  indent, #libname, cfg); \
1058  } \
1059  } \
1060  } \
1061 
1062 static void print_all_libs_info(int flags, int level)
1063 {
1064  PRINT_LIB_INFO(avutil, AVUTIL, flags, level);
1065  PRINT_LIB_INFO(avcodec, AVCODEC, flags, level);
1066  PRINT_LIB_INFO(avformat, AVFORMAT, flags, level);
1067  PRINT_LIB_INFO(avdevice, AVDEVICE, flags, level);
1068  PRINT_LIB_INFO(avfilter, AVFILTER, flags, level);
1069  PRINT_LIB_INFO(avresample, AVRESAMPLE, flags, level);
1070  PRINT_LIB_INFO(swscale, SWSCALE, flags, level);
1071  PRINT_LIB_INFO(swresample,SWRESAMPLE, flags, level);
1072  PRINT_LIB_INFO(postproc, POSTPROC, flags, level);
1073 }
1074 
1075 static void print_program_info(int flags, int level)
1076 {
1077  const char *indent = flags & INDENT? " " : "";
1078 
1079  av_log(NULL, level, "%s version " FFMPEG_VERSION, program_name);
1080  if (flags & SHOW_COPYRIGHT)
1081  av_log(NULL, level, " Copyright (c) %d-%d the FFmpeg developers",
1082  program_birth_year, CONFIG_THIS_YEAR);
1083  av_log(NULL, level, "\n");
1084  av_log(NULL, level, "%sbuilt with %s\n", indent, CC_IDENT);
1085 
1086  av_log(NULL, level, "%sconfiguration: " FFMPEG_CONFIGURATION "\n", indent);
1087 }
1088 
1089 static void print_buildconf(int flags, int level)
1090 {
1091  const char *indent = flags & INDENT ? " " : "";
1092  char str[] = { FFMPEG_CONFIGURATION };
1093  char *conflist, *remove_tilde, *splitconf;
1094 
1095  // Change all the ' --' strings to '~--' so that
1096  // they can be identified as tokens.
1097  while ((conflist = strstr(str, " --")) != NULL) {
1098  strncpy(conflist, "~--", 3);
1099  }
1100 
1101  // Compensate for the weirdness this would cause
1102  // when passing 'pkg-config --static'.
1103  while ((remove_tilde = strstr(str, "pkg-config~")) != NULL) {
1104  strncpy(remove_tilde, "pkg-config ", 11);
1105  }
1106 
1107  splitconf = strtok(str, "~");
1108  av_log(NULL, level, "\n%sconfiguration:\n", indent);
1109  while (splitconf != NULL) {
1110  av_log(NULL, level, "%s%s%s\n", indent, indent, splitconf);
1111  splitconf = strtok(NULL, "~");
1112  }
1113 }
1114 
1115 void show_banner(int argc, char **argv, const OptionDef *options)
1116 {
1117  int idx = locate_option(argc, argv, options, "version");
1118  if (hide_banner || idx)
1119  return;
1120 
1121  print_program_info (INDENT|SHOW_COPYRIGHT, AV_LOG_INFO);
1122  print_all_libs_info(INDENT|SHOW_CONFIG, AV_LOG_INFO);
1123  print_all_libs_info(INDENT|SHOW_VERSION, AV_LOG_INFO);
1124 }
1125 
1126 int show_version(void *optctx, const char *opt, const char *arg)
1127 {
1128  av_log_set_callback(log_callback_help);
1129  print_program_info (SHOW_COPYRIGHT, AV_LOG_INFO);
1130  print_all_libs_info(SHOW_VERSION, AV_LOG_INFO);
1131 
1132  return 0;
1133 }
1134 
1135 int show_buildconf(void *optctx, const char *opt, const char *arg)
1136 {
1137  av_log_set_callback(log_callback_help);
1138  print_buildconf (INDENT|0, AV_LOG_INFO);
1139 
1140  return 0;
1141 }
1142 
1143 int show_license(void *optctx, const char *opt, const char *arg)
1144 {
1145 #if CONFIG_NONFREE
1146  printf(
1147  "This version of %s has nonfree parts compiled in.\n"
1148  "Therefore it is not legally redistributable.\n",
1149  program_name );
1150 #elif CONFIG_GPLV3
1151  printf(
1152  "%s is free software; you can redistribute it and/or modify\n"
1153  "it under the terms of the GNU General Public License as published by\n"
1154  "the Free Software Foundation; either version 3 of the License, or\n"
1155  "(at your option) any later version.\n"
1156  "\n"
1157  "%s is distributed in the hope that it will be useful,\n"
1158  "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
1159  "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
1160  "GNU General Public License for more details.\n"
1161  "\n"
1162  "You should have received a copy of the GNU General Public License\n"
1163  "along with %s. If not, see <http://www.gnu.org/licenses/>.\n",
1164  program_name, program_name, program_name );
1165 #elif CONFIG_GPL
1166  printf(
1167  "%s is free software; you can redistribute it and/or modify\n"
1168  "it under the terms of the GNU General Public License as published by\n"
1169  "the Free Software Foundation; either version 2 of the License, or\n"
1170  "(at your option) any later version.\n"
1171  "\n"
1172  "%s is distributed in the hope that it will be useful,\n"
1173  "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
1174  "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
1175  "GNU General Public License for more details.\n"
1176  "\n"
1177  "You should have received a copy of the GNU General Public License\n"
1178  "along with %s; if not, write to the Free Software\n"
1179  "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
1180  program_name, program_name, program_name );
1181 #elif CONFIG_LGPLV3
1182  printf(
1183  "%s is free software; you can redistribute it and/or modify\n"
1184  "it under the terms of the GNU Lesser General Public License as published by\n"
1185  "the Free Software Foundation; either version 3 of the License, or\n"
1186  "(at your option) any later version.\n"
1187  "\n"
1188  "%s is distributed in the hope that it will be useful,\n"
1189  "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
1190  "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
1191  "GNU Lesser General Public License for more details.\n"
1192  "\n"
1193  "You should have received a copy of the GNU Lesser General Public License\n"
1194  "along with %s. If not, see <http://www.gnu.org/licenses/>.\n",
1195  program_name, program_name, program_name );
1196 #else
1197  printf(
1198  "%s is free software; you can redistribute it and/or\n"
1199  "modify it under the terms of the GNU Lesser General Public\n"
1200  "License as published by the Free Software Foundation; either\n"
1201  "version 2.1 of the License, or (at your option) any later version.\n"
1202  "\n"
1203  "%s is distributed in the hope that it will be useful,\n"
1204  "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
1205  "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\n"
1206  "Lesser General Public License for more details.\n"
1207  "\n"
1208  "You should have received a copy of the GNU Lesser General Public\n"
1209  "License along with %s; if not, write to the Free Software\n"
1210  "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
1211  program_name, program_name, program_name );
1212 #endif
1213 
1214  return 0;
1215 }
1216 
1217 static int is_device(const AVClass *avclass)
1218 {
1219  if (!avclass)
1220  return 0;
1221  return AV_IS_INPUT_DEVICE(avclass->category) || AV_IS_OUTPUT_DEVICE(avclass->category);
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 |
1313  CODEC_CAP_SLICE_THREADS)) {
1314  case 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",
1334  AV_PIX_FMT_NONE, GET_PIX_FMT_NAME);
1335  PRINT_CODEC_SUPPORTED(c, supported_samplerates, int, "sample rates", 0,
1336  GET_SAMPLE_RATE_NAME);
1337  PRINT_CODEC_SUPPORTED(c, sample_fmts, enum AVSampleFormat, "sample formats",
1338  AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME);
1339  PRINT_CODEC_SUPPORTED(c, channel_layouts, uint64_t, "channel layouts",
1340  0, GET_CH_LAYOUT_DESC);
1341 
1342  if (c->priv_class) {
1343  show_help_children(c->priv_class,
1344  AV_OPT_FLAG_ENCODING_PARAM |
1345  AV_OPT_FLAG_DECODING_PARAM);
1346  }
1347 }
1348 
1349 static char get_media_type_char(enum AVMediaType type)
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) :
1687  avcodec_find_decoder_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)
1726  show_help_children(fmt->priv_class, AV_OPT_FLAG_DECODING_PARAM);
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)
1759  show_help_children(fmt->priv_class, AV_OPT_FLAG_ENCODING_PARAM);
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 
1781  if (f->flags & AVFILTER_FLAG_SLICE_THREADS)
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),
1788  media_type_string(avfilter_pad_get_type(f->inputs, i)));
1789  }
1790  if (f->flags & AVFILTER_FLAG_DYNAMIC_INPUTS)
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),
1799  media_type_string(avfilter_pad_get_type(f->outputs, i)));
1800  }
1801  if (f->flags & AVFILTER_FLAG_DYNAMIC_OUTPUTS)
1802  printf(" dynamic (depending on the options)\n");
1803  else if (!count)
1804  printf(" none (sink filter)\n");
1805 
1806  if (f->priv_class)
1807  show_help_children(f->priv_class, AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM |
1808  AV_OPT_FLAG_AUDIO_PARAM);
1809  if (f->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)
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;
1821  av_log_set_callback(log_callback_help);
1822 
1823  topic = av_strdup(arg ? arg : "");
1824  if (!topic)
1825  return AVERROR(ENOMEM);
1826  par = strchr(topic, '=');
1827  if (par)
1828  *par++ = 0;
1829 
1830  if (!*topic) {
1831  show_help_default(topic, par);
1832  } else if (!strcmp(topic, "decoder")) {
1833  show_help_codec(par, 0);
1834  } else if (!strcmp(topic, "encoder")) {
1835  show_help_codec(par, 1);
1836  } else if (!strcmp(topic, "demuxer")) {
1837  show_help_demuxer(par);
1838  } else if (!strcmp(topic, "muxer")) {
1839  show_help_muxer(par);
1840 #if CONFIG_AVFILTER
1841  } else if (!strcmp(topic, "filter")) {
1842  show_help_filter(par);
1843 #endif
1844  } else {
1845  show_help_default(topic, par);
1846  }
1847 
1848  av_freep(&topic);
1849  return 0;
1850 }
1851 
1852 int read_yesno(void)
1853 {
1854  int c = getchar();
1855  int yesno = (av_toupper(c) == 'Y');
1856 
1857  while (c != '\n' && c != EOF)
1858  c = getchar();
1859 
1860  return yesno;
1861 }
1862 
1863 int cmdutils_read_file(const char *filename, char **bufptr, size_t *size)
1864 {
1865  int64_t ret;
1866  FILE *f = av_fopen_utf8(filename, "rb");
1867 
1868  if (!f) {
1869  ret = AVERROR(errno);
1870  av_log(NULL, AV_LOG_ERROR, "Cannot read file '%s': %s\n", filename,
1871  strerror(errno));
1872  return ret;
1873  }
1874 
1875  ret = fseek(f, 0, SEEK_END);
1876  if (ret == -1) {
1877  ret = AVERROR(errno);
1878  goto out;
1879  }
1880 
1881  ret = ftell(f);
1882  if (ret < 0) {
1883  ret = AVERROR(errno);
1884  goto out;
1885  }
1886  *size = ret;
1887 
1888  ret = fseek(f, 0, SEEK_SET);
1889  if (ret == -1) {
1890  ret = AVERROR(errno);
1891  goto out;
1892  }
1893 
1894  *bufptr = av_malloc(*size + 1);
1895  if (!*bufptr) {
1896  av_log(NULL, AV_LOG_ERROR, "Could not allocate file buffer\n");
1897  ret = AVERROR(ENOMEM);
1898  goto out;
1899  }
1900  ret = fread(*bufptr, 1, *size, f);
1901  if (ret < *size) {
1902  av_free(*bufptr);
1903  if (ferror(f)) {
1904  ret = AVERROR(errno);
1905  av_log(NULL, AV_LOG_ERROR, "Error while reading file '%s': %s\n",
1906  filename, strerror(errno));
1907  } else
1908  ret = AVERROR_EOF;
1909  } else {
1910  ret = 0;
1911  (*bufptr)[(*size)++] = '\0';
1912  }
1913 
1914 out:
1915  if (ret < 0)
1916  av_log(NULL, AV_LOG_ERROR, "IO error: %s\n", av_err2str(ret));
1917  fclose(f);
1918  return ret;
1919 }
1920 
1921 FILE *get_preset_file(char *filename, size_t filename_size,
1922  const char *preset_name, int is_path,
1923  const char *codec_name)
1924 {
1925  FILE *f = NULL;
1926  int i;
1927  const char *base[3] = { getenv("FFMPEG_DATADIR"),
1928  getenv("HOME"),
1929  FFMPEG_DATADIR, };
1930 
1931  if (is_path) {
1932  av_strlcpy(filename, preset_name, filename_size);
1933  f = fopen(filename, "r");
1934  } else {
1935 #ifdef _WIN32
1936  char datadir[MAX_PATH], *ls;
1937  base[2] = NULL;
1938 
1939  if (GetModuleFileNameA(GetModuleHandleA(NULL), datadir, sizeof(datadir) - 1))
1940  {
1941  for (ls = datadir; ls < datadir + strlen(datadir); ls++)
1942  if (*ls == '\\') *ls = '/';
1943 
1944  if (ls = strrchr(datadir, '/'))
1945  {
1946  *ls = 0;
1947  strncat(datadir, "/ffpresets", sizeof(datadir) - 1 - strlen(datadir));
1948  base[2] = datadir;
1949  }
1950  }
1951 #endif
1952  for (i = 0; i < 3 && !f; i++) {
1953  if (!base[i])
1954  continue;
1955  snprintf(filename, filename_size, "%s%s/%s.ffpreset", base[i],
1956  i != 1 ? "" : "/.ffmpeg", preset_name);
1957  f = fopen(filename, "r");
1958  if (!f && codec_name) {
1959  snprintf(filename, filename_size,
1960  "%s%s/%s-%s.ffpreset",
1961  base[i], i != 1 ? "" : "/.ffmpeg", codec_name,
1962  preset_name);
1963  f = fopen(filename, "r");
1964  }
1965  }
1966  }
1967 
1968  return f;
1969 }
1970 
1971 int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
1972 {
1973  int ret = avformat_match_stream_specifier(s, st, spec);
1974  if (ret < 0)
1975  av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
1976  return ret;
1977 }
1978 
1979 AVDictionary *filter_codec_opts(AVDictionary *opts, enum AVCodecID codec_id,
1980  AVFormatContext *s, AVStream *st, AVCodec *codec)
1981 {
1982  AVDictionary *ret = NULL;
1983  AVDictionaryEntry *t = NULL;
1984  int flags = s->oformat ? AV_OPT_FLAG_ENCODING_PARAM
1985  : AV_OPT_FLAG_DECODING_PARAM;
1986  char prefix = 0;
1987  const AVClass *cc = avcodec_get_class();
1988 
1989  if (!codec)
1990  codec = s->oformat ? avcodec_find_encoder(codec_id)
1991  : avcodec_find_decoder(codec_id);
1992 
1993  switch (st->codec->codec_type) {
1994  case AVMEDIA_TYPE_VIDEO:
1995  prefix = 'v';
1996  flags |= AV_OPT_FLAG_VIDEO_PARAM;
1997  break;
1998  case AVMEDIA_TYPE_AUDIO:
1999  prefix = 'a';
2000  flags |= AV_OPT_FLAG_AUDIO_PARAM;
2001  break;
2002  case AVMEDIA_TYPE_SUBTITLE:
2003  prefix = 's';
2004  flags |= AV_OPT_FLAG_SUBTITLE_PARAM;
2005  break;
2006  }
2007 
2008  while (t = av_dict_get(opts, "", t, AV_DICT_IGNORE_SUFFIX)) {
2009  char *p = strchr(t->key, ':');
2010 
2011  /* check stream specification in opt name */
2012  if (p)
2013  switch (check_stream_specifier(s, st, p + 1)) {
2014  case 1: *p = 0; break;
2015  case 0: continue;
2016  default: exit_program(1);
2017  }
2018 
2019  if (av_opt_find(&cc, t->key, NULL, flags, AV_OPT_SEARCH_FAKE_OBJ) ||
2020  !codec ||
2021  (codec->priv_class &&
2022  av_opt_find(&codec->priv_class, t->key, NULL, flags,
2023  AV_OPT_SEARCH_FAKE_OBJ)))
2024  av_dict_set(&ret, t->key, t->value, 0);
2025  else if (t->key[0] == prefix &&
2026  av_opt_find(&cc, t->key + 1, NULL, flags,
2027  AV_OPT_SEARCH_FAKE_OBJ))
2028  av_dict_set(&ret, t->key + 1, t->value, 0);
2029 
2030  if (p)
2031  *p = ':';
2032  }
2033  return ret;
2034 }
2035 
2036 AVDictionary **setup_find_stream_info_opts(AVFormatContext *s,
2037  AVDictionary *codec_opts)
2038 {
2039  int i;
2040  AVDictionary **opts;
2041 
2042  if (!s->nb_streams)
2043  return NULL;
2044  opts = av_mallocz_array(s->nb_streams, sizeof(*opts));
2045  if (!opts) {
2046  av_log(NULL, AV_LOG_ERROR,
2047  "Could not alloc memory for stream options.\n");
2048  return NULL;
2049  }
2050  for (i = 0; i < s->nb_streams; i++)
2051  opts[i] = filter_codec_opts(codec_opts, s->streams[i]->codec->codec_id,
2052  s, s->streams[i], NULL);
2053  return opts;
2054 }
2055 
2056 void *grow_array(void *array, int elem_size, int *size, int new_size)
2057 {
2058  if (new_size >= INT_MAX / elem_size) {
2059  av_log(NULL, AV_LOG_ERROR, "Array too big.\n");
2060  exit_program(1);
2061  }
2062  if (*size < new_size) {
2063  uint8_t *tmp = av_realloc_array(array, new_size, elem_size);
2064  if (!tmp) {
2065  av_log(NULL, AV_LOG_ERROR, "Could not alloc buffer.\n");
2066  exit_program(1);
2067  }
2068  memset(tmp + *size*elem_size, 0, (new_size-*size) * elem_size);
2069  *size = new_size;
2070  return tmp;
2071  }
2072  return array;
2073 }
2074 
2075 #if CONFIG_AVDEVICE
2076 static int print_device_sources(AVInputFormat *fmt, AVDictionary *opts)
2077 {
2078  int ret, i;
2079  AVDeviceInfoList *device_list = NULL;
2080 
2081  if (!fmt || !fmt->priv_class || !AV_IS_INPUT_DEVICE(fmt->priv_class->category))
2082  return AVERROR(EINVAL);
2083 
2084  printf("Audo-detected sources for %s:\n", fmt->name);
2085  if (!fmt->get_device_list) {
2086  ret = AVERROR(ENOSYS);
2087  printf("Cannot list sources. Not implemented.\n");
2088  goto fail;
2089  }
2090 
2091  if ((ret = avdevice_list_input_sources(fmt, NULL, opts, &device_list)) < 0) {
2092  printf("Cannot list sources.\n");
2093  goto fail;
2094  }
2095 
2096  for (i = 0; i < device_list->nb_devices; i++) {
2097  printf("%s %s [%s]\n", device_list->default_device == i ? "*" : " ",
2098  device_list->devices[i]->device_name, device_list->devices[i]->device_description);
2099  }
2100 
2101  fail:
2102  avdevice_free_list_devices(&device_list);
2103  return ret;
2104 }
2105 
2106 static int print_device_sinks(AVOutputFormat *fmt, AVDictionary *opts)
2107 {
2108  int ret, i;
2109  AVDeviceInfoList *device_list = NULL;
2110 
2111  if (!fmt || !fmt->priv_class || !AV_IS_OUTPUT_DEVICE(fmt->priv_class->category))
2112  return AVERROR(EINVAL);
2113 
2114  printf("Audo-detected sinks for %s:\n", fmt->name);
2115  if (!fmt->get_device_list) {
2116  ret = AVERROR(ENOSYS);
2117  printf("Cannot list sinks. Not implemented.\n");
2118  goto fail;
2119  }
2120 
2121  if ((ret = avdevice_list_output_sinks(fmt, NULL, opts, &device_list)) < 0) {
2122  printf("Cannot list sinks.\n");
2123  goto fail;
2124  }
2125 
2126  for (i = 0; i < device_list->nb_devices; i++) {
2127  printf("%s %s [%s]\n", device_list->default_device == i ? "*" : " ",
2128  device_list->devices[i]->device_name, device_list->devices[i]->device_description);
2129  }
2130 
2131  fail:
2132  avdevice_free_list_devices(&device_list);
2133  return ret;
2134 }
2135 
2136 static int show_sinks_sources_parse_arg(const char *arg, char **dev, AVDictionary **opts)
2137 {
2138  int ret;
2139  if (arg) {
2140  char *opts_str = NULL;
2141  av_assert0(dev && opts);
2142  *dev = av_strdup(arg);
2143  if (!*dev)
2144  return AVERROR(ENOMEM);
2145  if ((opts_str = strchr(*dev, ','))) {
2146  *(opts_str++) = '\0';
2147  if (opts_str[0] && ((ret = av_dict_parse_string(opts, opts_str, "=", ":", 0)) < 0)) {
2148  av_freep(dev);
2149  return ret;
2150  }
2151  }
2152  } else
2153  printf("\nDevice name is not provided.\n"
2154  "You can pass devicename[,opt1=val1[,opt2=val2...]] as an argument.\n\n");
2155  return 0;
2156 }
2157 
2158 int show_sources(void *optctx, const char *opt, const char *arg)
2159 {
2160  AVInputFormat *fmt = NULL;
2161  char *dev = NULL;
2162  AVDictionary *opts = NULL;
2163  int ret = 0;
2164  int error_level = av_log_get_level();
2165 
2166  av_log_set_level(AV_LOG_ERROR);
2167 
2168  if ((ret = show_sinks_sources_parse_arg(arg, &dev, &opts)) < 0)
2169  goto fail;
2170 
2171  do {
2172  fmt = av_input_audio_device_next(fmt);
2173  if (fmt) {
2174  if (!strcmp(fmt->name, "lavfi"))
2175  continue; //it's pointless to probe lavfi
2176  if (dev && !av_match_name(dev, fmt->name))
2177  continue;
2178  print_device_sources(fmt, opts);
2179  }
2180  } while (fmt);
2181  do {
2182  fmt = av_input_video_device_next(fmt);
2183  if (fmt) {
2184  if (dev && !av_match_name(dev, fmt->name))
2185  continue;
2186  print_device_sources(fmt, opts);
2187  }
2188  } while (fmt);
2189  fail:
2190  av_dict_free(&opts);
2191  av_free(dev);
2192  av_log_set_level(error_level);
2193  return ret;
2194 }
2195 
2196 int show_sinks(void *optctx, const char *opt, const char *arg)
2197 {
2198  AVOutputFormat *fmt = NULL;
2199  char *dev = NULL;
2200  AVDictionary *opts = NULL;
2201  int ret = 0;
2202  int error_level = av_log_get_level();
2203 
2204  av_log_set_level(AV_LOG_ERROR);
2205 
2206  if ((ret = show_sinks_sources_parse_arg(arg, &dev, &opts)) < 0)
2207  goto fail;
2208 
2209  do {
2210  fmt = av_output_audio_device_next(fmt);
2211  if (fmt) {
2212  if (dev && !av_match_name(dev, fmt->name))
2213  continue;
2214  print_device_sinks(fmt, opts);
2215  }
2216  } while (fmt);
2217  do {
2218  fmt = av_output_video_device_next(fmt);
2219  if (fmt) {
2220  if (dev && !av_match_name(dev, fmt->name))
2221  continue;
2222  print_device_sinks(fmt, opts);
2223  }
2224  } while (fmt);
2225  fail:
2226  av_dict_free(&opts);
2227  av_free(dev);
2228  av_log_set_level(error_level);
2229  return ret;
2230 }
2231 #endif
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