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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 != NULL; 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 != NULL) {
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 == NULL) {
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->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"))
526  av_log_set_level(AV_LOG_DEBUG);
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,
533  AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) ||
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,
540  AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
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,
549  AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) {
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,
567  AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
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,
581  AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
582  av_dict_set(&resample_opts, opt, arg, FLAGS);
583  consumed = 1;
584  }
585 #endif
586 
587  if (consumed)
588  return 0;
589  return AVERROR_OPTION_NOT_FOUND;
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;
634  g->format_opts = format_opts;
635  g->resample_opts = resample_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 
664 static void init_parse_context(OptionParseContext *octx,
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 
686 void uninit_parse_context(OptionParseContext *octx)
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);
695  av_dict_free(&l->groups[j].codec_opts);
696  av_dict_free(&l->groups[j].format_opts);
697  av_dict_free(&l->groups[j].resample_opts);
698 #if CONFIG_SWSCALE
699  sws_freeContext(l->groups[j].sws_opts);
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);
807  return AVERROR_OPTION_NOT_FOUND;
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  av_log(NULL, AV_LOG_ERROR, "Failed to open report \"%s\": %s\n",
963  filename.str, strerror(errno));
964  return AVERROR(errno);
965  }
966  av_log_set_callback(log_callback_report);
967  av_log(NULL, AV_LOG_INFO,
968  "%s started on %04d-%02d-%02d at %02d:%02d:%02d\n"
969  "Report written to \"%s\"\n",
970  program_name,
971  tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
972  tm->tm_hour, tm->tm_min, tm->tm_sec,
973  filename.str);
974  av_bprint_finalize(&filename, NULL);
975  return 0;
976 }
977 
978 int opt_report(const char *opt)
979 {
980  return init_report(NULL);
981 }
982 
983 int opt_max_alloc(void *optctx, const char *opt, const char *arg)
984 {
985  char *tail;
986  size_t max;
987 
988  max = strtol(arg, &tail, 10);
989  if (*tail) {
990  av_log(NULL, AV_LOG_FATAL, "Invalid max_alloc \"%s\".\n", arg);
991  exit_program(1);
992  }
993  av_max_alloc(max);
994  return 0;
995 }
996 
997 int opt_timelimit(void *optctx, const char *opt, const char *arg)
998 {
999 #if HAVE_SETRLIMIT
1000  int lim = parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
1001  struct rlimit rl = { lim, lim + 1 };
1002  if (setrlimit(RLIMIT_CPU, &rl))
1003  perror("setrlimit");
1004 #else
1005  av_log(NULL, AV_LOG_WARNING, "-%s not implemented on this OS\n", opt);
1006 #endif
1007  return 0;
1008 }
1009 
1010 void print_error(const char *filename, int err)
1011 {
1012  char errbuf[128];
1013  const char *errbuf_ptr = errbuf;
1014 
1015  if (av_strerror(err, errbuf, sizeof(errbuf)) < 0)
1016  errbuf_ptr = strerror(AVUNERROR(err));
1017  av_log(NULL, AV_LOG_ERROR, "%s: %s\n", filename, errbuf_ptr);
1018 }
1019 
1020 static int warned_cfg = 0;
1021 
1022 #define INDENT 1
1023 #define SHOW_VERSION 2
1024 #define SHOW_CONFIG 4
1025 #define SHOW_COPYRIGHT 8
1026 
1027 #define PRINT_LIB_INFO(libname, LIBNAME, flags, level) \
1028  if (CONFIG_##LIBNAME) { \
1029  const char *indent = flags & INDENT? " " : ""; \
1030  if (flags & SHOW_VERSION) { \
1031  unsigned int version = libname##_version(); \
1032  av_log(NULL, level, \
1033  "%slib%-11s %2d.%3d.%3d / %2d.%3d.%3d\n", \
1034  indent, #libname, \
1035  LIB##LIBNAME##_VERSION_MAJOR, \
1036  LIB##LIBNAME##_VERSION_MINOR, \
1037  LIB##LIBNAME##_VERSION_MICRO, \
1038  version >> 16, version >> 8 & 0xff, version & 0xff); \
1039  } \
1040  if (flags & SHOW_CONFIG) { \
1041  const char *cfg = libname##_configuration(); \
1042  if (strcmp(FFMPEG_CONFIGURATION, cfg)) { \
1043  if (!warned_cfg) { \
1044  av_log(NULL, level, \
1045  "%sWARNING: library configuration mismatch\n", \
1046  indent); \
1047  warned_cfg = 1; \
1048  } \
1049  av_log(NULL, level, "%s%-11s configuration: %s\n", \
1050  indent, #libname, cfg); \
1051  } \
1052  } \
1053  } \
1054 
1055 static void print_all_libs_info(int flags, int level)
1056 {
1057  PRINT_LIB_INFO(avutil, AVUTIL, flags, level);
1058  PRINT_LIB_INFO(avcodec, AVCODEC, flags, level);
1059  PRINT_LIB_INFO(avformat, AVFORMAT, flags, level);
1060  PRINT_LIB_INFO(avdevice, AVDEVICE, flags, level);
1061  PRINT_LIB_INFO(avfilter, AVFILTER, flags, level);
1062  PRINT_LIB_INFO(avresample, AVRESAMPLE, flags, level);
1063  PRINT_LIB_INFO(swscale, SWSCALE, flags, level);
1064  PRINT_LIB_INFO(swresample,SWRESAMPLE, flags, level);
1065  PRINT_LIB_INFO(postproc, POSTPROC, flags, level);
1066 }
1067 
1068 static void print_program_info(int flags, int level)
1069 {
1070  const char *indent = flags & INDENT? " " : "";
1071 
1072  av_log(NULL, level, "%s version " FFMPEG_VERSION, program_name);
1073  if (flags & SHOW_COPYRIGHT)
1074  av_log(NULL, level, " Copyright (c) %d-%d the FFmpeg developers",
1075  program_birth_year, CONFIG_THIS_YEAR);
1076  av_log(NULL, level, "\n");
1077  av_log(NULL, level, "%sbuilt on %s %s with %s\n",
1078  indent, __DATE__, __TIME__, CC_IDENT);
1079 
1080  av_log(NULL, level, "%sconfiguration: " FFMPEG_CONFIGURATION "\n", indent);
1081 }
1082 
1083 static void print_buildconf(int flags, int level)
1084 {
1085  const char *indent = flags & INDENT ? " " : "";
1086  char str[] = { FFMPEG_CONFIGURATION };
1087  char *conflist, *remove_tilde, *splitconf;
1088 
1089  // Change all the ' --' strings to '~--' so that
1090  // they can be identified as tokens.
1091  while ((conflist = strstr(str, " --")) != NULL) {
1092  strncpy(conflist, "~--", 3);
1093  }
1094 
1095  // Compensate for the weirdness this would cause
1096  // when passing 'pkg-config --static'.
1097  while ((remove_tilde = strstr(str, "pkg-config~")) != NULL) {
1098  strncpy(remove_tilde, "pkg-config ", 11);
1099  }
1100 
1101  splitconf = strtok(str, "~");
1102  av_log(NULL, level, "\n%sconfiguration:\n", indent);
1103  while (splitconf != NULL) {
1104  av_log(NULL, level, "%s%s%s\n", indent, indent, splitconf);
1105  splitconf = strtok(NULL, "~");
1106  }
1107 }
1108 
1109 void show_banner(int argc, char **argv, const OptionDef *options)
1110 {
1111  int idx = locate_option(argc, argv, options, "version");
1112  if (hide_banner || idx)
1113  return;
1114 
1115  print_program_info (INDENT|SHOW_COPYRIGHT, AV_LOG_INFO);
1116  print_all_libs_info(INDENT|SHOW_CONFIG, AV_LOG_INFO);
1117  print_all_libs_info(INDENT|SHOW_VERSION, AV_LOG_INFO);
1118 }
1119 
1120 int show_version(void *optctx, const char *opt, const char *arg)
1121 {
1122  av_log_set_callback(log_callback_help);
1123  print_program_info (SHOW_COPYRIGHT, AV_LOG_INFO);
1124  print_all_libs_info(SHOW_VERSION, AV_LOG_INFO);
1125 
1126  return 0;
1127 }
1128 
1129 int show_buildconf(void *optctx, const char *opt, const char *arg)
1130 {
1131  av_log_set_callback(log_callback_help);
1132  print_buildconf (INDENT|0, AV_LOG_INFO);
1133 
1134  return 0;
1135 }
1136 
1137 int show_license(void *optctx, const char *opt, const char *arg)
1138 {
1139 #if CONFIG_NONFREE
1140  printf(
1141  "This version of %s has nonfree parts compiled in.\n"
1142  "Therefore it is not legally redistributable.\n",
1143  program_name );
1144 #elif CONFIG_GPLV3
1145  printf(
1146  "%s is free software; you can redistribute it and/or modify\n"
1147  "it under the terms of the GNU General Public License as published by\n"
1148  "the Free Software Foundation; either version 3 of the License, or\n"
1149  "(at your option) any later version.\n"
1150  "\n"
1151  "%s is distributed in the hope that it will be useful,\n"
1152  "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
1153  "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
1154  "GNU General Public License for more details.\n"
1155  "\n"
1156  "You should have received a copy of the GNU General Public License\n"
1157  "along with %s. If not, see <http://www.gnu.org/licenses/>.\n",
1158  program_name, program_name, program_name );
1159 #elif CONFIG_GPL
1160  printf(
1161  "%s is free software; you can redistribute it and/or modify\n"
1162  "it under the terms of the GNU General Public License as published by\n"
1163  "the Free Software Foundation; either version 2 of the License, or\n"
1164  "(at your option) any later version.\n"
1165  "\n"
1166  "%s is distributed in the hope that it will be useful,\n"
1167  "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
1168  "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
1169  "GNU General Public License for more details.\n"
1170  "\n"
1171  "You should have received a copy of the GNU General Public License\n"
1172  "along with %s; if not, write to the Free Software\n"
1173  "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
1174  program_name, program_name, program_name );
1175 #elif CONFIG_LGPLV3
1176  printf(
1177  "%s is free software; you can redistribute it and/or modify\n"
1178  "it under the terms of the GNU Lesser General Public License as published by\n"
1179  "the Free Software Foundation; either version 3 of the License, or\n"
1180  "(at your option) any later version.\n"
1181  "\n"
1182  "%s is distributed in the hope that it will be useful,\n"
1183  "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
1184  "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
1185  "GNU Lesser General Public License for more details.\n"
1186  "\n"
1187  "You should have received a copy of the GNU Lesser General Public License\n"
1188  "along with %s. If not, see <http://www.gnu.org/licenses/>.\n",
1189  program_name, program_name, program_name );
1190 #else
1191  printf(
1192  "%s is free software; you can redistribute it and/or\n"
1193  "modify it under the terms of the GNU Lesser General Public\n"
1194  "License as published by the Free Software Foundation; either\n"
1195  "version 2.1 of the License, or (at your option) any later version.\n"
1196  "\n"
1197  "%s is distributed in the hope that it will be useful,\n"
1198  "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
1199  "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\n"
1200  "Lesser General Public License for more details.\n"
1201  "\n"
1202  "You should have received a copy of the GNU Lesser General Public\n"
1203  "License along with %s; if not, write to the Free Software\n"
1204  "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
1205  program_name, program_name, program_name );
1206 #endif
1207 
1208  return 0;
1209 }
1210 
1211 static int is_device(const AVClass *avclass)
1212 {
1213  if (!avclass)
1214  return 0;
1215  return avclass->category == AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT ||
1216  avclass->category == AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT ||
1217  avclass->category == AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT ||
1218  avclass->category == AV_CLASS_CATEGORY_DEVICE_AUDIO_INPUT ||
1219  avclass->category == AV_CLASS_CATEGORY_DEVICE_OUTPUT ||
1220  avclass->category == AV_CLASS_CATEGORY_DEVICE_INPUT;
1221 }
1222 
1223 static int show_formats_devices(void *optctx, const char *opt, const char *arg, int device_only)
1224 {
1225  AVInputFormat *ifmt = NULL;
1226  AVOutputFormat *ofmt = NULL;
1227  const char *last_name;
1228  int is_dev;
1229 
1230  printf("%s\n"
1231  " D. = Demuxing supported\n"
1232  " .E = Muxing supported\n"
1233  " --\n", device_only ? "Devices:" : "File formats:");
1234  last_name = "000";
1235  for (;;) {
1236  int decode = 0;
1237  int encode = 0;
1238  const char *name = NULL;
1239  const char *long_name = NULL;
1240 
1241  while ((ofmt = av_oformat_next(ofmt))) {
1242  is_dev = is_device(ofmt->priv_class);
1243  if (!is_dev && device_only)
1244  continue;
1245  if ((name == NULL || strcmp(ofmt->name, name) < 0) &&
1246  strcmp(ofmt->name, last_name) > 0) {
1247  name = ofmt->name;
1248  long_name = ofmt->long_name;
1249  encode = 1;
1250  }
1251  }
1252  while ((ifmt = av_iformat_next(ifmt))) {
1253  is_dev = is_device(ifmt->priv_class);
1254  if (!is_dev && device_only)
1255  continue;
1256  if ((name == NULL || strcmp(ifmt->name, name) < 0) &&
1257  strcmp(ifmt->name, last_name) > 0) {
1258  name = ifmt->name;
1259  long_name = ifmt->long_name;
1260  encode = 0;
1261  }
1262  if (name && strcmp(ifmt->name, name) == 0)
1263  decode = 1;
1264  }
1265  if (name == NULL)
1266  break;
1267  last_name = name;
1268 
1269  printf(" %s%s %-15s %s\n",
1270  decode ? "D" : " ",
1271  encode ? "E" : " ",
1272  name,
1273  long_name ? long_name:" ");
1274  }
1275  return 0;
1276 }
1277 
1278 int show_formats(void *optctx, const char *opt, const char *arg)
1279 {
1280  return show_formats_devices(optctx, opt, arg, 0);
1281 }
1282 
1283 int show_devices(void *optctx, const char *opt, const char *arg)
1284 {
1285  return show_formats_devices(optctx, opt, arg, 1);
1286 }
1287 
1288 #define PRINT_CODEC_SUPPORTED(codec, field, type, list_name, term, get_name) \
1289  if (codec->field) { \
1290  const type *p = codec->field; \
1291  \
1292  printf(" Supported " list_name ":"); \
1293  while (*p != term) { \
1294  get_name(*p); \
1295  printf(" %s", name); \
1296  p++; \
1297  } \
1298  printf("\n"); \
1299  } \
1300 
1301 static void print_codec(const AVCodec *c)
1302 {
1303  int encoder = av_codec_is_encoder(c);
1304 
1305  printf("%s %s [%s]:\n", encoder ? "Encoder" : "Decoder", c->name,
1306  c->long_name ? c->long_name : "");
1307 
1308  if (c->type == AVMEDIA_TYPE_VIDEO ||
1309  c->type == AVMEDIA_TYPE_AUDIO) {
1310  printf(" Threading capabilities: ");
1311  switch (c->capabilities & (CODEC_CAP_FRAME_THREADS |
1312  CODEC_CAP_SLICE_THREADS)) {
1313  case CODEC_CAP_FRAME_THREADS |
1314  CODEC_CAP_SLICE_THREADS: printf("frame and slice"); break;
1315  case CODEC_CAP_FRAME_THREADS: printf("frame"); break;
1316  case CODEC_CAP_SLICE_THREADS: printf("slice"); break;
1317  default: printf("no"); break;
1318  }
1319  printf("\n");
1320  }
1321 
1322  if (c->supported_framerates) {
1323  const AVRational *fps = c->supported_framerates;
1324 
1325  printf(" Supported framerates:");
1326  while (fps->num) {
1327  printf(" %d/%d", fps->num, fps->den);
1328  fps++;
1329  }
1330  printf("\n");
1331  }
1332  PRINT_CODEC_SUPPORTED(c, pix_fmts, enum AVPixelFormat, "pixel formats",
1333  AV_PIX_FMT_NONE, GET_PIX_FMT_NAME);
1334  PRINT_CODEC_SUPPORTED(c, supported_samplerates, int, "sample rates", 0,
1335  GET_SAMPLE_RATE_NAME);
1336  PRINT_CODEC_SUPPORTED(c, sample_fmts, enum AVSampleFormat, "sample formats",
1337  AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME);
1338  PRINT_CODEC_SUPPORTED(c, channel_layouts, uint64_t, "channel layouts",
1339  0, GET_CH_LAYOUT_DESC);
1340 
1341  if (c->priv_class) {
1342  show_help_children(c->priv_class,
1343  AV_OPT_FLAG_ENCODING_PARAM |
1344  AV_OPT_FLAG_DECODING_PARAM);
1345  }
1346 }
1347 
1348 static char get_media_type_char(enum AVMediaType type)
1349 {
1350  switch (type) {
1351  case AVMEDIA_TYPE_VIDEO: return 'V';
1352  case AVMEDIA_TYPE_AUDIO: return 'A';
1353  case AVMEDIA_TYPE_DATA: return 'D';
1354  case AVMEDIA_TYPE_SUBTITLE: return 'S';
1355  case AVMEDIA_TYPE_ATTACHMENT:return 'T';
1356  default: return '?';
1357  }
1358 }
1359 
1360 static const AVCodec *next_codec_for_id(enum AVCodecID id, const AVCodec *prev,
1361  int encoder)
1362 {
1363  while ((prev = av_codec_next(prev))) {
1364  if (prev->id == id &&
1365  (encoder ? av_codec_is_encoder(prev) : av_codec_is_decoder(prev)))
1366  return prev;
1367  }
1368  return NULL;
1369 }
1370 
1371 static int compare_codec_desc(const void *a, const void *b)
1372 {
1373  const AVCodecDescriptor * const *da = a;
1374  const AVCodecDescriptor * const *db = b;
1375 
1376  return (*da)->type != (*db)->type ? (*da)->type - (*db)->type :
1377  strcmp((*da)->name, (*db)->name);
1378 }
1379 
1380 static unsigned get_codecs_sorted(const AVCodecDescriptor ***rcodecs)
1381 {
1382  const AVCodecDescriptor *desc = NULL;
1383  const AVCodecDescriptor **codecs;
1384  unsigned nb_codecs = 0, i = 0;
1385 
1386  while ((desc = avcodec_descriptor_next(desc)))
1387  nb_codecs++;
1388  if (!(codecs = av_calloc(nb_codecs, sizeof(*codecs)))) {
1389  av_log(NULL, AV_LOG_ERROR, "Out of memory\n");
1390  exit_program(1);
1391  }
1392  desc = NULL;
1393  while ((desc = avcodec_descriptor_next(desc)))
1394  codecs[i++] = desc;
1395  av_assert0(i == nb_codecs);
1396  qsort(codecs, nb_codecs, sizeof(*codecs), compare_codec_desc);
1397  *rcodecs = codecs;
1398  return nb_codecs;
1399 }
1400 
1401 static void print_codecs_for_id(enum AVCodecID id, int encoder)
1402 {
1403  const AVCodec *codec = NULL;
1404 
1405  printf(" (%s: ", encoder ? "encoders" : "decoders");
1406 
1407  while ((codec = next_codec_for_id(id, codec, encoder)))
1408  printf("%s ", codec->name);
1409 
1410  printf(")");
1411 }
1412 
1413 int show_codecs(void *optctx, const char *opt, const char *arg)
1414 {
1415  const AVCodecDescriptor **codecs;
1416  unsigned i, nb_codecs = get_codecs_sorted(&codecs);
1417 
1418  printf("Codecs:\n"
1419  " D..... = Decoding supported\n"
1420  " .E.... = Encoding supported\n"
1421  " ..V... = Video codec\n"
1422  " ..A... = Audio codec\n"
1423  " ..S... = Subtitle codec\n"
1424  " ...I.. = Intra frame-only codec\n"
1425  " ....L. = Lossy compression\n"
1426  " .....S = Lossless compression\n"
1427  " -------\n");
1428  for (i = 0; i < nb_codecs; i++) {
1429  const AVCodecDescriptor *desc = codecs[i];
1430  const AVCodec *codec = NULL;
1431 
1432  if (strstr(desc->name, "_deprecated"))
1433  continue;
1434 
1435  printf(" ");
1436  printf(avcodec_find_decoder(desc->id) ? "D" : ".");
1437  printf(avcodec_find_encoder(desc->id) ? "E" : ".");
1438 
1439  printf("%c", get_media_type_char(desc->type));
1440  printf((desc->props & AV_CODEC_PROP_INTRA_ONLY) ? "I" : ".");
1441  printf((desc->props & AV_CODEC_PROP_LOSSY) ? "L" : ".");
1442  printf((desc->props & AV_CODEC_PROP_LOSSLESS) ? "S" : ".");
1443 
1444  printf(" %-20s %s", desc->name, desc->long_name ? desc->long_name : "");
1445 
1446  /* print decoders/encoders when there's more than one or their
1447  * names are different from codec name */
1448  while ((codec = next_codec_for_id(desc->id, codec, 0))) {
1449  if (strcmp(codec->name, desc->name)) {
1450  print_codecs_for_id(desc->id, 0);
1451  break;
1452  }
1453  }
1454  codec = NULL;
1455  while ((codec = next_codec_for_id(desc->id, codec, 1))) {
1456  if (strcmp(codec->name, desc->name)) {
1457  print_codecs_for_id(desc->id, 1);
1458  break;
1459  }
1460  }
1461 
1462  printf("\n");
1463  }
1464  av_free(codecs);
1465  return 0;
1466 }
1467 
1468 static void print_codecs(int encoder)
1469 {
1470  const AVCodecDescriptor **codecs;
1471  unsigned i, nb_codecs = get_codecs_sorted(&codecs);
1472 
1473  printf("%s:\n"
1474  " V..... = Video\n"
1475  " A..... = Audio\n"
1476  " S..... = Subtitle\n"
1477  " .F.... = Frame-level multithreading\n"
1478  " ..S... = Slice-level multithreading\n"
1479  " ...X.. = Codec is experimental\n"
1480  " ....B. = Supports draw_horiz_band\n"
1481  " .....D = Supports direct rendering method 1\n"
1482  " ------\n",
1483  encoder ? "Encoders" : "Decoders");
1484  for (i = 0; i < nb_codecs; i++) {
1485  const AVCodecDescriptor *desc = codecs[i];
1486  const AVCodec *codec = NULL;
1487 
1488  while ((codec = next_codec_for_id(desc->id, codec, encoder))) {
1489  printf(" %c", get_media_type_char(desc->type));
1490  printf((codec->capabilities & CODEC_CAP_FRAME_THREADS) ? "F" : ".");
1491  printf((codec->capabilities & CODEC_CAP_SLICE_THREADS) ? "S" : ".");
1492  printf((codec->capabilities & CODEC_CAP_EXPERIMENTAL) ? "X" : ".");
1493  printf((codec->capabilities & CODEC_CAP_DRAW_HORIZ_BAND)?"B" : ".");
1494  printf((codec->capabilities & CODEC_CAP_DR1) ? "D" : ".");
1495 
1496  printf(" %-20s %s", codec->name, codec->long_name ? codec->long_name : "");
1497  if (strcmp(codec->name, desc->name))
1498  printf(" (codec %s)", desc->name);
1499 
1500  printf("\n");
1501  }
1502  }
1503  av_free(codecs);
1504 }
1505 
1506 int show_decoders(void *optctx, const char *opt, const char *arg)
1507 {
1508  print_codecs(0);
1509  return 0;
1510 }
1511 
1512 int show_encoders(void *optctx, const char *opt, const char *arg)
1513 {
1514  print_codecs(1);
1515  return 0;
1516 }
1517 
1518 int show_bsfs(void *optctx, const char *opt, const char *arg)
1519 {
1520  AVBitStreamFilter *bsf = NULL;
1521 
1522  printf("Bitstream filters:\n");
1523  while ((bsf = av_bitstream_filter_next(bsf)))
1524  printf("%s\n", bsf->name);
1525  printf("\n");
1526  return 0;
1527 }
1528 
1529 int show_protocols(void *optctx, const char *opt, const char *arg)
1530 {
1531  void *opaque = NULL;
1532  const char *name;
1533 
1534  printf("Supported file protocols:\n"
1535  "Input:\n");
1536  while ((name = avio_enum_protocols(&opaque, 0)))
1537  printf("%s\n", name);
1538  printf("Output:\n");
1539  while ((name = avio_enum_protocols(&opaque, 1)))
1540  printf("%s\n", name);
1541  return 0;
1542 }
1543 
1544 int show_filters(void *optctx, const char *opt, const char *arg)
1545 {
1546  const AVFilter av_unused(*filter) = NULL;
1547  char descr[64], *descr_cur;
1548  int i, j;
1549  const AVFilterPad *pad;
1550 
1551  printf("Filters:\n"
1552  " T.. = Timeline support\n"
1553  " .S. = Slice threading\n"
1554  " ..C = Commmand support\n"
1555  " A = Audio input/output\n"
1556  " V = Video input/output\n"
1557  " N = Dynamic number and/or type of input/output\n"
1558  " | = Source or sink filter\n");
1559 #if CONFIG_AVFILTER
1560  while ((filter = avfilter_next(filter))) {
1561  descr_cur = descr;
1562  for (i = 0; i < 2; i++) {
1563  if (i) {
1564  *(descr_cur++) = '-';
1565  *(descr_cur++) = '>';
1566  }
1567  pad = i ? filter->outputs : filter->inputs;
1568  for (j = 0; pad && pad[j].name; j++) {
1569  if (descr_cur >= descr + sizeof(descr) - 4)
1570  break;
1571  *(descr_cur++) = get_media_type_char(pad[j].type);
1572  }
1573  if (!j)
1574  *(descr_cur++) = ((!i && (filter->flags & AVFILTER_FLAG_DYNAMIC_INPUTS)) ||
1575  ( i && (filter->flags & AVFILTER_FLAG_DYNAMIC_OUTPUTS))) ? 'N' : '|';
1576  }
1577  *descr_cur = 0;
1578  printf(" %c%c%c %-16s %-10s %s\n",
1579  filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE ? 'T' : '.',
1580  filter->flags & AVFILTER_FLAG_SLICE_THREADS ? 'S' : '.',
1581  filter->process_command ? 'C' : '.',
1582  filter->name, descr, filter->description);
1583  }
1584 #endif
1585  return 0;
1586 }
1587 
1588 int show_colors(void *optctx, const char *opt, const char *arg)
1589 {
1590  const char *name;
1591  const uint8_t *rgb;
1592  int i;
1593 
1594  printf("%-32s #RRGGBB\n", "name");
1595 
1596  for (i = 0; name = av_get_known_color_name(i, &rgb); i++)
1597  printf("%-32s #%02x%02x%02x\n", name, rgb[0], rgb[1], rgb[2]);
1598 
1599  return 0;
1600 }
1601 
1602 int show_pix_fmts(void *optctx, const char *opt, const char *arg)
1603 {
1604  const AVPixFmtDescriptor *pix_desc = NULL;
1605 
1606  printf("Pixel formats:\n"
1607  "I.... = Supported Input format for conversion\n"
1608  ".O... = Supported Output format for conversion\n"
1609  "..H.. = Hardware accelerated format\n"
1610  "...P. = Paletted format\n"
1611  "....B = Bitstream format\n"
1612  "FLAGS NAME NB_COMPONENTS BITS_PER_PIXEL\n"
1613  "-----\n");
1614 
1615 #if !CONFIG_SWSCALE
1616 # define sws_isSupportedInput(x) 0
1617 # define sws_isSupportedOutput(x) 0
1618 #endif
1619 
1620  while ((pix_desc = av_pix_fmt_desc_next(pix_desc))) {
1621  enum AVPixelFormat pix_fmt = av_pix_fmt_desc_get_id(pix_desc);
1622  printf("%c%c%c%c%c %-16s %d %2d\n",
1623  sws_isSupportedInput (pix_fmt) ? 'I' : '.',
1624  sws_isSupportedOutput(pix_fmt) ? 'O' : '.',
1625  pix_desc->flags & AV_PIX_FMT_FLAG_HWACCEL ? 'H' : '.',
1626  pix_desc->flags & AV_PIX_FMT_FLAG_PAL ? 'P' : '.',
1627  pix_desc->flags & AV_PIX_FMT_FLAG_BITSTREAM ? 'B' : '.',
1628  pix_desc->name,
1629  pix_desc->nb_components,
1630  av_get_bits_per_pixel(pix_desc));
1631  }
1632  return 0;
1633 }
1634 
1635 int show_layouts(void *optctx, const char *opt, const char *arg)
1636 {
1637  int i = 0;
1638  uint64_t layout, j;
1639  const char *name, *descr;
1640 
1641  printf("Individual channels:\n"
1642  "NAME DESCRIPTION\n");
1643  for (i = 0; i < 63; i++) {
1644  name = av_get_channel_name((uint64_t)1 << i);
1645  if (!name)
1646  continue;
1647  descr = av_get_channel_description((uint64_t)1 << i);
1648  printf("%-12s%s\n", name, descr);
1649  }
1650  printf("\nStandard channel layouts:\n"
1651  "NAME DECOMPOSITION\n");
1652  for (i = 0; !av_get_standard_channel_layout(i, &layout, &name); i++) {
1653  if (name) {
1654  printf("%-12s", name);
1655  for (j = 1; j; j <<= 1)
1656  if ((layout & j))
1657  printf("%s%s", (layout & (j - 1)) ? "+" : "", av_get_channel_name(j));
1658  printf("\n");
1659  }
1660  }
1661  return 0;
1662 }
1663 
1664 int show_sample_fmts(void *optctx, const char *opt, const char *arg)
1665 {
1666  int i;
1667  char fmt_str[128];
1668  for (i = -1; i < AV_SAMPLE_FMT_NB; i++)
1669  printf("%s\n", av_get_sample_fmt_string(fmt_str, sizeof(fmt_str), i));
1670  return 0;
1671 }
1672 
1673 static void show_help_codec(const char *name, int encoder)
1674 {
1675  const AVCodecDescriptor *desc;
1676  const AVCodec *codec;
1677 
1678  if (!name) {
1679  av_log(NULL, AV_LOG_ERROR, "No codec name specified.\n");
1680  return;
1681  }
1682 
1683  codec = encoder ? avcodec_find_encoder_by_name(name) :
1684  avcodec_find_decoder_by_name(name);
1685 
1686  if (codec)
1687  print_codec(codec);
1688  else if ((desc = avcodec_descriptor_get_by_name(name))) {
1689  int printed = 0;
1690 
1691  while ((codec = next_codec_for_id(desc->id, codec, encoder))) {
1692  printed = 1;
1693  print_codec(codec);
1694  }
1695 
1696  if (!printed) {
1697  av_log(NULL, AV_LOG_ERROR, "Codec '%s' is known to FFmpeg, "
1698  "but no %s for it are available. FFmpeg might need to be "
1699  "recompiled with additional external libraries.\n",
1700  name, encoder ? "encoders" : "decoders");
1701  }
1702  } else {
1703  av_log(NULL, AV_LOG_ERROR, "Codec '%s' is not recognized by FFmpeg.\n",
1704  name);
1705  }
1706 }
1707 
1708 static void show_help_demuxer(const char *name)
1709 {
1710  const AVInputFormat *fmt = av_find_input_format(name);
1711 
1712  if (!fmt) {
1713  av_log(NULL, AV_LOG_ERROR, "Unknown format '%s'.\n", name);
1714  return;
1715  }
1716 
1717  printf("Demuxer %s [%s]:\n", fmt->name, fmt->long_name);
1718 
1719  if (fmt->extensions)
1720  printf(" Common extensions: %s.\n", fmt->extensions);
1721 
1722  if (fmt->priv_class)
1723  show_help_children(fmt->priv_class, AV_OPT_FLAG_DECODING_PARAM);
1724 }
1725 
1726 static void show_help_muxer(const char *name)
1727 {
1728  const AVCodecDescriptor *desc;
1729  const AVOutputFormat *fmt = av_guess_format(name, NULL, NULL);
1730 
1731  if (!fmt) {
1732  av_log(NULL, AV_LOG_ERROR, "Unknown format '%s'.\n", name);
1733  return;
1734  }
1735 
1736  printf("Muxer %s [%s]:\n", fmt->name, fmt->long_name);
1737 
1738  if (fmt->extensions)
1739  printf(" Common extensions: %s.\n", fmt->extensions);
1740  if (fmt->mime_type)
1741  printf(" Mime type: %s.\n", fmt->mime_type);
1742  if (fmt->video_codec != AV_CODEC_ID_NONE &&
1743  (desc = avcodec_descriptor_get(fmt->video_codec))) {
1744  printf(" Default video codec: %s.\n", desc->name);
1745  }
1746  if (fmt->audio_codec != AV_CODEC_ID_NONE &&
1747  (desc = avcodec_descriptor_get(fmt->audio_codec))) {
1748  printf(" Default audio codec: %s.\n", desc->name);
1749  }
1750  if (fmt->subtitle_codec != AV_CODEC_ID_NONE &&
1751  (desc = avcodec_descriptor_get(fmt->subtitle_codec))) {
1752  printf(" Default subtitle codec: %s.\n", desc->name);
1753  }
1754 
1755  if (fmt->priv_class)
1756  show_help_children(fmt->priv_class, AV_OPT_FLAG_ENCODING_PARAM);
1757 }
1758 
1759 #if CONFIG_AVFILTER
1760 static void show_help_filter(const char *name)
1761 {
1762 #if CONFIG_AVFILTER
1763  const AVFilter *f = avfilter_get_by_name(name);
1764  int i, count;
1765 
1766  if (!name) {
1767  av_log(NULL, AV_LOG_ERROR, "No filter name specified.\n");
1768  return;
1769  } else if (!f) {
1770  av_log(NULL, AV_LOG_ERROR, "Unknown filter '%s'.\n", name);
1771  return;
1772  }
1773 
1774  printf("Filter %s\n", f->name);
1775  if (f->description)
1776  printf(" %s\n", f->description);
1777 
1778  if (f->flags & AVFILTER_FLAG_SLICE_THREADS)
1779  printf(" slice threading supported\n");
1780 
1781  printf(" Inputs:\n");
1782  count = avfilter_pad_count(f->inputs);
1783  for (i = 0; i < count; i++) {
1784  printf(" #%d: %s (%s)\n", i, avfilter_pad_get_name(f->inputs, i),
1785  media_type_string(avfilter_pad_get_type(f->inputs, i)));
1786  }
1787  if (f->flags & AVFILTER_FLAG_DYNAMIC_INPUTS)
1788  printf(" dynamic (depending on the options)\n");
1789  else if (!count)
1790  printf(" none (source filter)\n");
1791 
1792  printf(" Outputs:\n");
1793  count = avfilter_pad_count(f->outputs);
1794  for (i = 0; i < count; i++) {
1795  printf(" #%d: %s (%s)\n", i, avfilter_pad_get_name(f->outputs, i),
1796  media_type_string(avfilter_pad_get_type(f->outputs, i)));
1797  }
1798  if (f->flags & AVFILTER_FLAG_DYNAMIC_OUTPUTS)
1799  printf(" dynamic (depending on the options)\n");
1800  else if (!count)
1801  printf(" none (sink filter)\n");
1802 
1803  if (f->priv_class)
1804  show_help_children(f->priv_class, AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM |
1805  AV_OPT_FLAG_AUDIO_PARAM);
1806  if (f->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)
1807  printf("This filter has support for timeline through the 'enable' option.\n");
1808 #else
1809  av_log(NULL, AV_LOG_ERROR, "Build without libavfilter; "
1810  "can not to satisfy request\n");
1811 #endif
1812 }
1813 #endif
1814 
1815 int show_help(void *optctx, const char *opt, const char *arg)
1816 {
1817  char *topic, *par;
1818  av_log_set_callback(log_callback_help);
1819 
1820  topic = av_strdup(arg ? arg : "");
1821  par = strchr(topic, '=');
1822  if (par)
1823  *par++ = 0;
1824 
1825  if (!*topic) {
1826  show_help_default(topic, par);
1827  } else if (!strcmp(topic, "decoder")) {
1828  show_help_codec(par, 0);
1829  } else if (!strcmp(topic, "encoder")) {
1830  show_help_codec(par, 1);
1831  } else if (!strcmp(topic, "demuxer")) {
1832  show_help_demuxer(par);
1833  } else if (!strcmp(topic, "muxer")) {
1834  show_help_muxer(par);
1835 #if CONFIG_AVFILTER
1836  } else if (!strcmp(topic, "filter")) {
1837  show_help_filter(par);
1838 #endif
1839  } else {
1840  show_help_default(topic, par);
1841  }
1842 
1843  av_freep(&topic);
1844  return 0;
1845 }
1846 
1847 int read_yesno(void)
1848 {
1849  int c = getchar();
1850  int yesno = (av_toupper(c) == 'Y');
1851 
1852  while (c != '\n' && c != EOF)
1853  c = getchar();
1854 
1855  return yesno;
1856 }
1857 
1858 int cmdutils_read_file(const char *filename, char **bufptr, size_t *size)
1859 {
1860  int ret;
1861  FILE *f = av_fopen_utf8(filename, "rb");
1862 
1863  if (!f) {
1864  av_log(NULL, AV_LOG_ERROR, "Cannot read file '%s': %s\n", filename,
1865  strerror(errno));
1866  return AVERROR(errno);
1867  }
1868  fseek(f, 0, SEEK_END);
1869  *size = ftell(f);
1870  fseek(f, 0, SEEK_SET);
1871  if (*size == (size_t)-1) {
1872  av_log(NULL, AV_LOG_ERROR, "IO error: %s\n", strerror(errno));
1873  fclose(f);
1874  return AVERROR(errno);
1875  }
1876  *bufptr = av_malloc(*size + 1);
1877  if (!*bufptr) {
1878  av_log(NULL, AV_LOG_ERROR, "Could not allocate file buffer\n");
1879  fclose(f);
1880  return AVERROR(ENOMEM);
1881  }
1882  ret = fread(*bufptr, 1, *size, f);
1883  if (ret < *size) {
1884  av_free(*bufptr);
1885  if (ferror(f)) {
1886  av_log(NULL, AV_LOG_ERROR, "Error while reading file '%s': %s\n",
1887  filename, strerror(errno));
1888  ret = AVERROR(errno);
1889  } else
1890  ret = AVERROR_EOF;
1891  } else {
1892  ret = 0;
1893  (*bufptr)[(*size)++] = '\0';
1894  }
1895 
1896  fclose(f);
1897  return ret;
1898 }
1899 
1900 FILE *get_preset_file(char *filename, size_t filename_size,
1901  const char *preset_name, int is_path,
1902  const char *codec_name)
1903 {
1904  FILE *f = NULL;
1905  int i;
1906  const char *base[3] = { getenv("FFMPEG_DATADIR"),
1907  getenv("HOME"),
1908  FFMPEG_DATADIR, };
1909 
1910  if (is_path) {
1911  av_strlcpy(filename, preset_name, filename_size);
1912  f = fopen(filename, "r");
1913  } else {
1914 #ifdef _WIN32
1915  char datadir[MAX_PATH], *ls;
1916  base[2] = NULL;
1917 
1918  if (GetModuleFileNameA(GetModuleHandleA(NULL), datadir, sizeof(datadir) - 1))
1919  {
1920  for (ls = datadir; ls < datadir + strlen(datadir); ls++)
1921  if (*ls == '\\') *ls = '/';
1922 
1923  if (ls = strrchr(datadir, '/'))
1924  {
1925  *ls = 0;
1926  strncat(datadir, "/ffpresets", sizeof(datadir) - 1 - strlen(datadir));
1927  base[2] = datadir;
1928  }
1929  }
1930 #endif
1931  for (i = 0; i < 3 && !f; i++) {
1932  if (!base[i])
1933  continue;
1934  snprintf(filename, filename_size, "%s%s/%s.ffpreset", base[i],
1935  i != 1 ? "" : "/.ffmpeg", preset_name);
1936  f = fopen(filename, "r");
1937  if (!f && codec_name) {
1938  snprintf(filename, filename_size,
1939  "%s%s/%s-%s.ffpreset",
1940  base[i], i != 1 ? "" : "/.ffmpeg", codec_name,
1941  preset_name);
1942  f = fopen(filename, "r");
1943  }
1944  }
1945  }
1946 
1947  return f;
1948 }
1949 
1950 int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
1951 {
1952  int ret = avformat_match_stream_specifier(s, st, spec);
1953  if (ret < 0)
1954  av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
1955  return ret;
1956 }
1957 
1958 AVDictionary *filter_codec_opts(AVDictionary *opts, enum AVCodecID codec_id,
1959  AVFormatContext *s, AVStream *st, AVCodec *codec)
1960 {
1961  AVDictionary *ret = NULL;
1962  AVDictionaryEntry *t = NULL;
1963  int flags = s->oformat ? AV_OPT_FLAG_ENCODING_PARAM
1964  : AV_OPT_FLAG_DECODING_PARAM;
1965  char prefix = 0;
1966  const AVClass *cc = avcodec_get_class();
1967 
1968  if (!codec)
1969  codec = s->oformat ? avcodec_find_encoder(codec_id)
1970  : avcodec_find_decoder(codec_id);
1971 
1972  switch (st->codec->codec_type) {
1973  case AVMEDIA_TYPE_VIDEO:
1974  prefix = 'v';
1975  flags |= AV_OPT_FLAG_VIDEO_PARAM;
1976  break;
1977  case AVMEDIA_TYPE_AUDIO:
1978  prefix = 'a';
1979  flags |= AV_OPT_FLAG_AUDIO_PARAM;
1980  break;
1981  case AVMEDIA_TYPE_SUBTITLE:
1982  prefix = 's';
1983  flags |= AV_OPT_FLAG_SUBTITLE_PARAM;
1984  break;
1985  }
1986 
1987  while (t = av_dict_get(opts, "", t, AV_DICT_IGNORE_SUFFIX)) {
1988  char *p = strchr(t->key, ':');
1989 
1990  /* check stream specification in opt name */
1991  if (p)
1992  switch (check_stream_specifier(s, st, p + 1)) {
1993  case 1: *p = 0; break;
1994  case 0: continue;
1995  default: return NULL;
1996  }
1997 
1998  if (av_opt_find(&cc, t->key, NULL, flags, AV_OPT_SEARCH_FAKE_OBJ) ||
1999  !codec ||
2000  (codec->priv_class &&
2001  av_opt_find(&codec->priv_class, t->key, NULL, flags,
2002  AV_OPT_SEARCH_FAKE_OBJ)))
2003  av_dict_set(&ret, t->key, t->value, 0);
2004  else if (t->key[0] == prefix &&
2005  av_opt_find(&cc, t->key + 1, NULL, flags,
2006  AV_OPT_SEARCH_FAKE_OBJ))
2007  av_dict_set(&ret, t->key + 1, t->value, 0);
2008 
2009  if (p)
2010  *p = ':';
2011  }
2012  return ret;
2013 }
2014 
2015 AVDictionary **setup_find_stream_info_opts(AVFormatContext *s,
2016  AVDictionary *codec_opts)
2017 {
2018  int i;
2019  AVDictionary **opts;
2020 
2021  if (!s->nb_streams)
2022  return NULL;
2023  opts = av_mallocz_array(s->nb_streams, sizeof(*opts));
2024  if (!opts) {
2025  av_log(NULL, AV_LOG_ERROR,
2026  "Could not alloc memory for stream options.\n");
2027  return NULL;
2028  }
2029  for (i = 0; i < s->nb_streams; i++)
2030  opts[i] = filter_codec_opts(codec_opts, s->streams[i]->codec->codec_id,
2031  s, s->streams[i], NULL);
2032  return opts;
2033 }
2034 
2035 void *grow_array(void *array, int elem_size, int *size, int new_size)
2036 {
2037  if (new_size >= INT_MAX / elem_size) {
2038  av_log(NULL, AV_LOG_ERROR, "Array too big.\n");
2039  exit_program(1);
2040  }
2041  if (*size < new_size) {
2042  uint8_t *tmp = av_realloc(array, new_size*elem_size);
2043  if (!tmp) {
2044  av_log(NULL, AV_LOG_ERROR, "Could not alloc buffer.\n");
2045  exit_program(1);
2046  }
2047  memset(tmp + *size*elem_size, 0, (new_size-*size) * elem_size);
2048  *size = new_size;
2049  return tmp;
2050  }
2051  return array;
2052 }
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