path: root/cmdutils.c (plain)
blob: 3d428f3eea8a90dc6f753520cab7ad545d5c524b

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/display.h"
45	#include "libavutil/mathematics.h"
46	#include "libavutil/imgutils.h"
47	#include "libavutil/libm.h"
48	#include "libavutil/parseutils.h"
49	#include "libavutil/pixdesc.h"
50	#include "libavutil/eval.h"
51	#include "libavutil/dict.h"
52	#include "libavutil/opt.h"
53	#include "libavutil/cpu.h"
54	#include "libavutil/ffversion.h"
55	#include "libavutil/version.h"
56	#include "cmdutils.h"
57	#if CONFIG_NETWORK
58	#include "libavformat/network.h"
59	#endif
60	#if HAVE_SYS_RESOURCE_H
61	#include <sys/time.h>
62	#include <sys/resource.h>
63	#endif
64	#ifdef _WIN32
65	#include <windows.h>
66	#endif
67
68	static int init_report(const char *env);
69
70	AVDictionary *sws_dict;
71	AVDictionary *swr_opts;
72	AVDictionary *format_opts, *codec_opts, *resample_opts;
73
74	static FILE *report_file;
75	static int report_file_level = AV_LOG_DEBUG;
76	int hide_banner = 0;
77
78	enum show_muxdemuxers {
79	SHOW_DEFAULT,
80	SHOW_DEMUXERS,
81	SHOW_MUXERS,
82	};
83
84	void init_opts(void)
85	{
86	av_dict_set(&sws_dict, "flags", "bicubic", 0);
87	}
88
89	void uninit_opts(void)
90	{
91	av_dict_free(&swr_opts);
92	av_dict_free(&sws_dict);
93	av_dict_free(&format_opts);
94	av_dict_free(&codec_opts);
95	av_dict_free(&resample_opts);
96	}
97
98	void log_callback_help(void *ptr, int level, const char *fmt, va_list vl)
99	{
100	vfprintf(stdout, fmt, vl);
101	}
102
103	static void log_callback_report(void *ptr, int level, const char *fmt, va_list vl)
104	{
105	va_list vl2;
106	char line[1024];
107	static int print_prefix = 1;
108
109	va_copy(vl2, vl);
110	av_log_default_callback(ptr, level, fmt, vl);
111	av_log_format_line(ptr, level, fmt, vl2, line, sizeof(line), &print_prefix);
112	va_end(vl2);
113	if (report_file_level >= level) {
114	fputs(line, report_file);
115	fflush(report_file);
116	}
117	}
118
119	void init_dynload(void)
120	{
121	#ifdef _WIN32
122	/* Calling SetDllDirectory with the empty string (but not NULL) removes the
123	* current working directory from the DLL search path as a security pre-caution. */
124	SetDllDirectory("");
125	#endif
126	}
127
128	static void (*program_exit)(int ret);
129
130	void register_exit(void (*cb)(int ret))
131	{
132	program_exit = cb;
133	}
134
135	void exit_program(int ret)
136	{
137	if (program_exit)
138	program_exit(ret);
139
140	exit(ret);
141	}
142
143	double parse_number_or_die(const char *context, const char *numstr, int type,
144	double min, double max)
145	{
146	char *tail;
147	const char *error;
148	double d = av_strtod(numstr, &tail);
149	if (*tail)
150	error = "Expected number for %s but found: %s\n";
151	else if (d < min || d > max)
152	error = "The value for %s was %s which is not within %f - %f\n";
153	else if (type == OPT_INT64 && (int64_t)d != d)
154	error = "Expected int64 for %s but found %s\n";
155	else if (type == OPT_INT && (int)d != d)
156	error = "Expected int for %s but found %s\n";
157	else
158	return d;
159	av_log(NULL, AV_LOG_FATAL, error, context, numstr, min, max);
160	exit_program(1);
161	return 0;
162	}
163
164	int64_t parse_time_or_die(const char *context, const char *timestr,
165	int is_duration)
166	{
167	int64_t us;
168	if (av_parse_time(&us, timestr, is_duration) < 0) {
169	av_log(NULL, AV_LOG_FATAL, "Invalid %s specification for %s: %s\n",
170	is_duration ? "duration" : "date", context, timestr);
171	exit_program(1);
172	}
173	return us;
174	}
175
176	void show_help_options(const OptionDef *options, const char *msg, int req_flags,
177	int rej_flags, int alt_flags)
178	{
179	const OptionDef *po;
180	int first;
181
182	first = 1;
183	for (po = options; po->name; po++) {
184	char buf[64];
185
186	if (((po->flags & req_flags) != req_flags) ||
187	(alt_flags && !(po->flags & alt_flags)) ||
188	(po->flags & rej_flags))
189	continue;
190
191	if (first) {
192	printf("%s\n", msg);
193	first = 0;
194	}
195	av_strlcpy(buf, po->name, sizeof(buf));
196	if (po->argname) {
197	av_strlcat(buf, " ", sizeof(buf));
198	av_strlcat(buf, po->argname, sizeof(buf));
199	}
200	printf("-%-17s %s\n", buf, po->help);
201	}
202	printf("\n");
203	}
204
205	void show_help_children(const AVClass *class, int flags)
206	{
207	const AVClass *child = NULL;
208	if (class->option) {
209	av_opt_show2(&class, NULL, flags, 0);
210	printf("\n");
211	}
212
213	while (child = av_opt_child_class_next(class, child))
214	show_help_children(child, flags);
215	}
216
217	static const OptionDef *find_option(const OptionDef *po, const char *name)
218	{
219	const char *p = strchr(name, ':');
220	int len = p ? p - name : strlen(name);
221
222	while (po->name) {
223	if (!strncmp(name, po->name, len) && strlen(po->name) == len)
224	break;
225	po++;
226	}
227	return po;
228	}
229
230	/* _WIN32 means using the windows libc - cygwin doesn't define that
231	* by default. HAVE_COMMANDLINETOARGVW is true on cygwin, while
232	* it doesn't provide the actual command line via GetCommandLineW(). */
233	#if HAVE_COMMANDLINETOARGVW && defined(_WIN32)
234	#include <shellapi.h>
235	/* Will be leaked on exit */
236	static char** win32_argv_utf8 = NULL;
237	static int win32_argc = 0;
238
239	/**
240	* Prepare command line arguments for executable.
241	* For Windows - perform wide-char to UTF-8 conversion.
242	* Input arguments should be main() function arguments.
243	* @param argc_ptr Arguments number (including executable)
244	* @param argv_ptr Arguments list.
245	*/
246	static void prepare_app_arguments(int *argc_ptr, char ***argv_ptr)
247	{
248	char *argstr_flat;
249	wchar_t **argv_w;
250	int i, buffsize = 0, offset = 0;
251
252	if (win32_argv_utf8) {
253	*argc_ptr = win32_argc;
254	*argv_ptr = win32_argv_utf8;
255	return;
256	}
257
258	win32_argc = 0;
259	argv_w = CommandLineToArgvW(GetCommandLineW(), &win32_argc);
260	if (win32_argc <= 0 || !argv_w)
261	return;
262
263	/* determine the UTF-8 buffer size (including NULL-termination symbols) */
264	for (i = 0; i < win32_argc; i++)
265	buffsize += WideCharToMultiByte(CP_UTF8, 0, argv_w[i], -1,
266	NULL, 0, NULL, NULL);
267
268	win32_argv_utf8 = av_mallocz(sizeof(char *) * (win32_argc + 1) + buffsize);
269	argstr_flat = (char *)win32_argv_utf8 + sizeof(char *) * (win32_argc + 1);
270	if (!win32_argv_utf8) {
271	LocalFree(argv_w);
272	return;
273	}
274
275	for (i = 0; i < win32_argc; i++) {
276	win32_argv_utf8[i] = &argstr_flat[offset];
277	offset += WideCharToMultiByte(CP_UTF8, 0, argv_w[i], -1,
278	&argstr_flat[offset],
279	buffsize - offset, NULL, NULL);
280	}
281	win32_argv_utf8[i] = NULL;
282	LocalFree(argv_w);
283
284	*argc_ptr = win32_argc;
285	*argv_ptr = win32_argv_utf8;
286	}
287	#else
288	static inline void prepare_app_arguments(int *argc_ptr, char ***argv_ptr)
289	{
290	/* nothing to do */
291	}
292	#endif /* HAVE_COMMANDLINETOARGVW */
293
294	static int write_option(void *optctx, const OptionDef *po, const char *opt,
295	const char *arg)
296	{
297	/* new-style options contain an offset into optctx, old-style address of
298	* a global var*/
299	void *dst = po->flags & (OPT_OFFSET | OPT_SPEC) ?
300	(uint8_t *)optctx + po->u.off : po->u.dst_ptr;
301	int *dstcount;
302
303	if (po->flags & OPT_SPEC) {
304	SpecifierOpt **so = dst;
305	char *p = strchr(opt, ':');
306	char *str;
307
308	dstcount = (int *)(so + 1);
309	*so = grow_array(*so, sizeof(**so), dstcount, *dstcount + 1);
310	str = av_strdup(p ? p + 1 : "");
311	if (!str)
312	return AVERROR(ENOMEM);
313	(*so)[*dstcount - 1].specifier = str;
314	dst = &(*so)[*dstcount - 1].u;
315	}
316
317	if (po->flags & OPT_STRING) {
318	char *str;
319	str = av_strdup(arg);
320	av_freep(dst);
321	if (!str)
322	return AVERROR(ENOMEM);
323	*(char **)dst = str;
324	} else if (po->flags & OPT_BOOL || po->flags & OPT_INT) {
325	*(int *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT_MIN, INT_MAX);
326	} else if (po->flags & OPT_INT64) {
327	*(int64_t *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT64_MIN, INT64_MAX);
328	} else if (po->flags & OPT_TIME) {
329	*(int64_t *)dst = parse_time_or_die(opt, arg, 1);
330	} else if (po->flags & OPT_FLOAT) {
331	*(float *)dst = parse_number_or_die(opt, arg, OPT_FLOAT, -INFINITY, INFINITY);
332	} else if (po->flags & OPT_DOUBLE) {
333	*(double *)dst = parse_number_or_die(opt, arg, OPT_DOUBLE, -INFINITY, INFINITY);
334	} else if (po->u.func_arg) {
335	int ret = po->u.func_arg(optctx, opt, arg);
336	if (ret < 0) {
337	av_log(NULL, AV_LOG_ERROR,
338	"Failed to set value '%s' for option '%s': %s\n",
339	arg, opt, av_err2str(ret));
340	return ret;
341	}
342	}
343	if (po->flags & OPT_EXIT)
344	exit_program(0);
345
346	return 0;
347	}
348
349	int parse_option(void *optctx, const char *opt, const char *arg,
350	const OptionDef *options)
351	{
352	const OptionDef *po;
353	int ret;
354
355	po = find_option(options, opt);
356	if (!po->name && opt[0] == 'n' && opt[1] == 'o') {
357	/* handle 'no' bool option */
358	po = find_option(options, opt + 2);
359	if ((po->name && (po->flags & OPT_BOOL)))
360	arg = "0";
361	} else if (po->flags & OPT_BOOL)
362	arg = "1";
363
364	if (!po->name)
365	po = find_option(options, "default");
366	if (!po->name) {
367	av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'\n", opt);
368	return AVERROR(EINVAL);
369	}
370	if (po->flags & HAS_ARG && !arg) {
371	av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'\n", opt);
372	return AVERROR(EINVAL);
373	}
374
375	ret = write_option(optctx, po, opt, arg);
376	if (ret < 0)
377	return ret;
378
379	return !!(po->flags & HAS_ARG);
380	}
381
382	void parse_options(void *optctx, int argc, char **argv, const OptionDef *options,
383	void (*parse_arg_function)(void *, const char*))
384	{
385	const char *opt;
386	int optindex, handleoptions = 1, ret;
387
388	/* perform system-dependent conversions for arguments list */
389	prepare_app_arguments(&argc, &argv);
390
391	/* parse options */
392	optindex = 1;
393	while (optindex < argc) {
394	opt = argv[optindex++];
395
396	if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
397	if (opt[1] == '-' && opt[2] == '\0') {
398	handleoptions = 0;
399	continue;
400	}
401	opt++;
402
403	if ((ret = parse_option(optctx, opt, argv[optindex], options)) < 0)
404	exit_program(1);
405	optindex += ret;
406	} else {
407	if (parse_arg_function)
408	parse_arg_function(optctx, opt);
409	}
410	}
411	}
412
413	int parse_optgroup(void *optctx, OptionGroup *g)
414	{
415	int i, ret;
416
417	av_log(NULL, AV_LOG_DEBUG, "Parsing a group of options: %s %s.\n",
418	g->group_def->name, g->arg);
419
420	for (i = 0; i < g->nb_opts; i++) {
421	Option *o = &g->opts[i];
422
423	if (g->group_def->flags &&
424	!(g->group_def->flags & o->opt->flags)) {
425	av_log(NULL, AV_LOG_ERROR, "Option %s (%s) cannot be applied to "
426	"%s %s -- you are trying to apply an input option to an "
427	"output file or vice versa. Move this option before the "
428	"file it belongs to.\n", o->key, o->opt->help,
429	g->group_def->name, g->arg);
430	return AVERROR(EINVAL);
431	}
432
433	av_log(NULL, AV_LOG_DEBUG, "Applying option %s (%s) with argument %s.\n",
434	o->key, o->opt->help, o->val);
435
436	ret = write_option(optctx, o->opt, o->key, o->val);
437	if (ret < 0)
438	return ret;
439	}
440
441	av_log(NULL, AV_LOG_DEBUG, "Successfully parsed a group of options.\n");
442
443	return 0;
444	}
445
446	int locate_option(int argc, char **argv, const OptionDef *options,
447	const char *optname)
448	{
449	const OptionDef *po;
450	int i;
451
452	for (i = 1; i < argc; i++) {
453	const char *cur_opt = argv[i];
454
455	if (*cur_opt++ != '-')
456	continue;
457
458	po = find_option(options, cur_opt);
459	if (!po->name && cur_opt[0] == 'n' && cur_opt[1] == 'o')
460	po = find_option(options, cur_opt + 2);
461
462	if ((!po->name && !strcmp(cur_opt, optname)) ||
463	(po->name && !strcmp(optname, po->name)))
464	return i;
465
466	if (!po->name || po->flags & HAS_ARG)
467	i++;
468	}
469	return 0;
470	}
471
472	static void dump_argument(const char *a)
473	{
474	const unsigned char *p;
475
476	for (p = a; *p; p++)
477	if (!((*p >= '+' && *p <= ':') || (*p >= '@' && *p <= 'Z') ||
478	*p == '_' || (*p >= 'a' && *p <= 'z')))
479	break;
480	if (!*p) {
481	fputs(a, report_file);
482	return;
483	}
484	fputc('"', report_file);
485	for (p = a; *p; p++) {
486	if (*p == '\\' || *p == '"' || *p == '$' || *p == '`')
487	fprintf(report_file, "\\%c", *p);
488	else if (*p < ' ' || *p > '~')
489	fprintf(report_file, "\\x%02x", *p);
490	else
491	fputc(*p, report_file);
492	}
493	fputc('"', report_file);
494	}
495
496	static void check_options(const OptionDef *po)
497	{
498	while (po->name) {
499	if (po->flags & OPT_PERFILE)
500	av_assert0(po->flags & (OPT_INPUT | OPT_OUTPUT));
501	po++;
502	}
503	}
504
505	void parse_loglevel(int argc, char **argv, const OptionDef *options)
506	{
507	int idx = locate_option(argc, argv, options, "loglevel");
508	const char *env;
509
510	check_options(options);
511
512	if (!idx)
513	idx = locate_option(argc, argv, options, "v");
514	if (idx && argv[idx + 1])
515	opt_loglevel(NULL, "loglevel", argv[idx + 1]);
516	idx = locate_option(argc, argv, options, "report");
517	if ((env = getenv("FFREPORT")) || idx) {
518	init_report(env);
519	if (report_file) {
520	int i;
521	fprintf(report_file, "Command line:\n");
522	for (i = 0; i < argc; i++) {
523	dump_argument(argv[i]);
524	fputc(i < argc - 1 ? ' ' : '\n', report_file);
525	}
526	fflush(report_file);
527	}
528	}
529	idx = locate_option(argc, argv, options, "hide_banner");
530	if (idx)
531	hide_banner = 1;
532	}
533
534	static const AVOption *opt_find(void *obj, const char *name, const char *unit,
535	int opt_flags, int search_flags)
536	{
537	const AVOption *o = av_opt_find(obj, name, unit, opt_flags, search_flags);
538	if(o && !o->flags)
539	return NULL;
540	return o;
541	}
542
543	#define FLAGS (o->type == AV_OPT_TYPE_FLAGS && (arg[0]=='-' || arg[0]=='+')) ? AV_DICT_APPEND : 0
544	int opt_default(void *optctx, const char *opt, const char *arg)
545	{
546	const AVOption *o;
547	int consumed = 0;
548	char opt_stripped[128];
549	const char *p;
550	const AVClass *cc = avcodec_get_class(), *fc = avformat_get_class();
551	#if CONFIG_AVRESAMPLE
552	const AVClass *rc = avresample_get_class();
553	#endif
554	#if CONFIG_SWSCALE
555	const AVClass *sc = sws_get_class();
556	#endif
557	#if CONFIG_SWRESAMPLE
558	const AVClass *swr_class = swr_get_class();
559	#endif
560
561	if (!strcmp(opt, "debug") || !strcmp(opt, "fdebug"))
562	av_log_set_level(AV_LOG_DEBUG);
563
564	if (!(p = strchr(opt, ':')))
565	p = opt + strlen(opt);
566	av_strlcpy(opt_stripped, opt, FFMIN(sizeof(opt_stripped), p - opt + 1));
567
568	if ((o = opt_find(&cc, opt_stripped, NULL, 0,
569	AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) ||
570	((opt[0] == 'v' || opt[0] == 'a' || opt[0] == 's') &&
571	(o = opt_find(&cc, opt + 1, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ)))) {
572	av_dict_set(&codec_opts, opt, arg, FLAGS);
573	consumed = 1;
574	}
575	if ((o = opt_find(&fc, opt, NULL, 0,
576	AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
577	av_dict_set(&format_opts, opt, arg, FLAGS);
578	if (consumed)
579	av_log(NULL, AV_LOG_VERBOSE, "Routing option %s to both codec and muxer layer\n", opt);
580	consumed = 1;
581	}
582	#if CONFIG_SWSCALE
583	if (!consumed && (o = opt_find(&sc, opt, NULL, 0,
584	AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
585	struct SwsContext *sws = sws_alloc_context();
586	int ret = av_opt_set(sws, opt, arg, 0);
587	sws_freeContext(sws);
588	if (!strcmp(opt, "srcw") || !strcmp(opt, "srch") ||
589	!strcmp(opt, "dstw") || !strcmp(opt, "dsth") ||
590	!strcmp(opt, "src_format") || !strcmp(opt, "dst_format")) {
591	av_log(NULL, AV_LOG_ERROR, "Directly using swscale dimensions/format options is not supported, please use the -s or -pix_fmt options\n");
592	return AVERROR(EINVAL);
593	}
594	if (ret < 0) {
595	av_log(NULL, AV_LOG_ERROR, "Error setting option %s.\n", opt);
596	return ret;
597	}
598
599	av_dict_set(&sws_dict, opt, arg, FLAGS);
600
601	consumed = 1;
602	}
603	#else
604	if (!consumed && !strcmp(opt, "sws_flags")) {
605	av_log(NULL, AV_LOG_WARNING, "Ignoring %s %s, due to disabled swscale\n", opt, arg);
606	consumed = 1;
607	}
608	#endif
609	#if CONFIG_SWRESAMPLE
610	if (!consumed && (o=opt_find(&swr_class, opt, NULL, 0,
611	AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
612	struct SwrContext *swr = swr_alloc();
613	int ret = av_opt_set(swr, opt, arg, 0);
614	swr_free(&swr);
615	if (ret < 0) {
616	av_log(NULL, AV_LOG_ERROR, "Error setting option %s.\n", opt);
617	return ret;
618	}
619	av_dict_set(&swr_opts, opt, arg, FLAGS);
620	consumed = 1;
621	}
622	#endif
623	#if CONFIG_AVRESAMPLE
624	if ((o=opt_find(&rc, opt, NULL, 0,
625	AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
626	av_dict_set(&resample_opts, opt, arg, FLAGS);
627	consumed = 1;
628	}
629	#endif
630
631	if (consumed)
632	return 0;
633	return AVERROR_OPTION_NOT_FOUND;
634	}
635
636	/*
637	* Check whether given option is a group separator.
638	*
639	* @return index of the group definition that matched or -1 if none
640	*/
641	static int match_group_separator(const OptionGroupDef *groups, int nb_groups,
642	const char *opt)
643	{
644	int i;
645
646	for (i = 0; i < nb_groups; i++) {
647	const OptionGroupDef *p = &groups[i];
648	if (p->sep && !strcmp(p->sep, opt))
649	return i;
650	}
651
652	return -1;
653	}
654
655	/*
656	* Finish parsing an option group.
657	*
658	* @param group_idx which group definition should this group belong to
659	* @param arg argument of the group delimiting option
660	*/
661	static void finish_group(OptionParseContext *octx, int group_idx,
662	const char *arg)
663	{
664	OptionGroupList *l = &octx->groups[group_idx];
665	OptionGroup *g;
666
667	GROW_ARRAY(l->groups, l->nb_groups);
668	g = &l->groups[l->nb_groups - 1];
669
670	*g = octx->cur_group;
671	g->arg = arg;
672	g->group_def = l->group_def;
673	g->sws_dict = sws_dict;
674	g->swr_opts = swr_opts;
675	g->codec_opts = codec_opts;
676	g->format_opts = format_opts;
677	g->resample_opts = resample_opts;
678
679	codec_opts = NULL;
680	format_opts = NULL;
681	resample_opts = NULL;
682	sws_dict = NULL;
683	swr_opts = NULL;
684	init_opts();
685
686	memset(&octx->cur_group, 0, sizeof(octx->cur_group));
687	}
688
689	/*
690	* Add an option instance to currently parsed group.
691	*/
692	static void add_opt(OptionParseContext *octx, const OptionDef *opt,
693	const char *key, const char *val)
694	{
695	int global = !(opt->flags & (OPT_PERFILE | OPT_SPEC | OPT_OFFSET));
696	OptionGroup *g = global ? &octx->global_opts : &octx->cur_group;
697
698	GROW_ARRAY(g->opts, g->nb_opts);
699	g->opts[g->nb_opts - 1].opt = opt;
700	g->opts[g->nb_opts - 1].key = key;
701	g->opts[g->nb_opts - 1].val = val;
702	}
703
704	static void init_parse_context(OptionParseContext *octx,
705	const OptionGroupDef *groups, int nb_groups)
706	{
707	static const OptionGroupDef global_group = { "global" };
708	int i;
709
710	memset(octx, 0, sizeof(*octx));
711
712	octx->nb_groups = nb_groups;
713	octx->groups = av_mallocz_array(octx->nb_groups, sizeof(*octx->groups));
714	if (!octx->groups)
715	exit_program(1);
716
717	for (i = 0; i < octx->nb_groups; i++)
718	octx->groups[i].group_def = &groups[i];
719
720	octx->global_opts.group_def = &global_group;
721	octx->global_opts.arg = "";
722
723	init_opts();
724	}
725
726	void uninit_parse_context(OptionParseContext *octx)
727	{
728	int i, j;
729
730	for (i = 0; i < octx->nb_groups; i++) {
731	OptionGroupList *l = &octx->groups[i];
732
733	for (j = 0; j < l->nb_groups; j++) {
734	av_freep(&l->groups[j].opts);
735	av_dict_free(&l->groups[j].codec_opts);
736	av_dict_free(&l->groups[j].format_opts);
737	av_dict_free(&l->groups[j].resample_opts);
738
739	av_dict_free(&l->groups[j].sws_dict);
740	av_dict_free(&l->groups[j].swr_opts);
741	}
742	av_freep(&l->groups);
743	}
744	av_freep(&octx->groups);
745
746	av_freep(&octx->cur_group.opts);
747	av_freep(&octx->global_opts.opts);
748
749	uninit_opts();
750	}
751
752	int split_commandline(OptionParseContext *octx, int argc, char *argv[],
753	const OptionDef *options,
754	const OptionGroupDef *groups, int nb_groups)
755	{
756	int optindex = 1;
757	int dashdash = -2;
758
759	/* perform system-dependent conversions for arguments list */
760	prepare_app_arguments(&argc, &argv);
761
762	init_parse_context(octx, groups, nb_groups);
763	av_log(NULL, AV_LOG_DEBUG, "Splitting the commandline.\n");
764
765	while (optindex < argc) {
766	const char *opt = argv[optindex++], *arg;
767	const OptionDef *po;
768	int ret;
769
770	av_log(NULL, AV_LOG_DEBUG, "Reading option '%s' ...", opt);
771
772	if (opt[0] == '-' && opt[1] == '-' && !opt[2]) {
773	dashdash = optindex;
774	continue;
775	}
776	/* unnamed group separators, e.g. output filename */
777	if (opt[0] != '-' || !opt[1] || dashdash+1 == optindex) {
778	finish_group(octx, 0, opt);
779	av_log(NULL, AV_LOG_DEBUG, " matched as %s.\n", groups[0].name);
780	continue;
781	}
782	opt++;
783
784	#define GET_ARG(arg) \
785	do { \
786	arg = argv[optindex++]; \
787	if (!arg) { \
788	av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'.\n", opt);\
789	return AVERROR(EINVAL); \
790	} \
791	} while (0)
792
793	/* named group separators, e.g. -i */
794	if ((ret = match_group_separator(groups, nb_groups, opt)) >= 0) {
795	GET_ARG(arg);
796	finish_group(octx, ret, arg);
797	av_log(NULL, AV_LOG_DEBUG, " matched as %s with argument '%s'.\n",
798	groups[ret].name, arg);
799	continue;
800	}
801
802	/* normal options */
803	po = find_option(options, opt);
804	if (po->name) {
805	if (po->flags & OPT_EXIT) {
806	/* optional argument, e.g. -h */
807	arg = argv[optindex++];
808	} else if (po->flags & HAS_ARG) {
809	GET_ARG(arg);
810	} else {
811	arg = "1";
812	}
813
814	add_opt(octx, po, opt, arg);
815	av_log(NULL, AV_LOG_DEBUG, " matched as option '%s' (%s) with "
816	"argument '%s'.\n", po->name, po->help, arg);
817	continue;
818	}
819
820	/* AVOptions */
821	if (argv[optindex]) {
822	ret = opt_default(NULL, opt, argv[optindex]);
823	if (ret >= 0) {
824	av_log(NULL, AV_LOG_DEBUG, " matched as AVOption '%s' with "
825	"argument '%s'.\n", opt, argv[optindex]);
826	optindex++;
827	continue;
828	} else if (ret != AVERROR_OPTION_NOT_FOUND) {
829	av_log(NULL, AV_LOG_ERROR, "Error parsing option '%s' "
830	"with argument '%s'.\n", opt, argv[optindex]);
831	return ret;
832	}
833	}
834
835	/* boolean -nofoo options */
836	if (opt[0] == 'n' && opt[1] == 'o' &&
837	(po = find_option(options, opt + 2)) &&
838	po->name && po->flags & OPT_BOOL) {
839	add_opt(octx, po, opt, "0");
840	av_log(NULL, AV_LOG_DEBUG, " matched as option '%s' (%s) with "
841	"argument 0.\n", po->name, po->help);
842	continue;
843	}
844
845	av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'.\n", opt);
846	return AVERROR_OPTION_NOT_FOUND;
847	}
848
849	if (octx->cur_group.nb_opts || codec_opts || format_opts || resample_opts)
850	av_log(NULL, AV_LOG_WARNING, "Trailing options were found on the "
851	"commandline.\n");
852
853	av_log(NULL, AV_LOG_DEBUG, "Finished splitting the commandline.\n");
854
855	return 0;
856	}
857
858	int opt_cpuflags(void *optctx, const char *opt, const char *arg)
859	{
860	int ret;
861	unsigned flags = av_get_cpu_flags();
862
863	if ((ret = av_parse_cpu_caps(&flags, arg)) < 0)
864	return ret;
865
866	av_force_cpu_flags(flags);
867	return 0;
868	}
869
870	int opt_loglevel(void *optctx, const char *opt, const char *arg)
871	{
872	const struct { const char *name; int level; } log_levels[] = {
873	{ "quiet" , AV_LOG_QUIET },
874	{ "panic" , AV_LOG_PANIC },
875	{ "fatal" , AV_LOG_FATAL },
876	{ "error" , AV_LOG_ERROR },
877	{ "warning", AV_LOG_WARNING },
878	{ "info" , AV_LOG_INFO },
879	{ "verbose", AV_LOG_VERBOSE },
880	{ "debug" , AV_LOG_DEBUG },
881	{ "trace" , AV_LOG_TRACE },
882	};
883	char *tail;
884	int level;
885	int flags;
886	int i;
887
888	flags = av_log_get_flags();
889	tail = strstr(arg, "repeat");
890	if (tail)
891	flags &= ~AV_LOG_SKIP_REPEATED;
892	else
893	flags |= AV_LOG_SKIP_REPEATED;
894
895	av_log_set_flags(flags);
896	if (tail == arg)
897	arg += 6 + (arg[6]=='+');
898	if(tail && !*arg)
899	return 0;
900
901	for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++) {
902	if (!strcmp(log_levels[i].name, arg)) {
903	av_log_set_level(log_levels[i].level);
904	return 0;
905	}
906	}
907
908	level = strtol(arg, &tail, 10);
909	if (*tail) {
910	av_log(NULL, AV_LOG_FATAL, "Invalid loglevel \"%s\". "
911	"Possible levels are numbers or:\n", arg);
912	for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++)
913	av_log(NULL, AV_LOG_FATAL, "\"%s\"\n", log_levels[i].name);
914	exit_program(1);
915	}
916	av_log_set_level(level);
917	return 0;
918	}
919
920	static void expand_filename_template(AVBPrint *bp, const char *template,
921	struct tm *tm)
922	{
923	int c;
924
925	while ((c = *(template++))) {
926	if (c == '%') {
927	if (!(c = *(template++)))
928	break;
929	switch (c) {
930	case 'p':
931	av_bprintf(bp, "%s", program_name);
932	break;
933	case 't':
934	av_bprintf(bp, "%04d%02d%02d-%02d%02d%02d",
935	tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
936	tm->tm_hour, tm->tm_min, tm->tm_sec);
937	break;
938	case '%':
939	av_bprint_chars(bp, c, 1);
940	break;
941	}
942	} else {
943	av_bprint_chars(bp, c, 1);
944	}
945	}
946	}
947
948	static int init_report(const char *env)
949	{
950	char *filename_template = NULL;
951	char *key, *val;
952	int ret, count = 0;
953	time_t now;
954	struct tm *tm;
955	AVBPrint filename;
956
957	if (report_file) /* already opened */
958	return 0;
959	time(&now);
960	tm = localtime(&now);
961
962	while (env && *env) {
963	if ((ret = av_opt_get_key_value(&env, "=", ":", 0, &key, &val)) < 0) {
964	if (count)
965	av_log(NULL, AV_LOG_ERROR,
966	"Failed to parse FFREPORT environment variable: %s\n",
967	av_err2str(ret));
968	break;
969	}
970	if (*env)
971	env++;
972	count++;
973	if (!strcmp(key, "file")) {
974	av_free(filename_template);
975	filename_template = val;
976	val = NULL;
977	} else if (!strcmp(key, "level")) {
978	char *tail;
979	report_file_level = strtol(val, &tail, 10);
980	if (*tail) {
981	av_log(NULL, AV_LOG_FATAL, "Invalid report file level\n");
982	exit_program(1);
983	}
984	} else {
985	av_log(NULL, AV_LOG_ERROR, "Unknown key '%s' in FFREPORT\n", key);
986	}
987	av_free(val);
988	av_free(key);
989	}
990
991	av_bprint_init(&filename, 0, 1);
992	expand_filename_template(&filename,
993	av_x_if_null(filename_template, "%p-%t.log"), tm);
994	av_free(filename_template);
995	if (!av_bprint_is_complete(&filename)) {
996	av_log(NULL, AV_LOG_ERROR, "Out of memory building report file name\n");
997	return AVERROR(ENOMEM);
998	}
999
1000	report_file = fopen(filename.str, "w");
1001	if (!report_file) {
1002	int ret = AVERROR(errno);
1003	av_log(NULL, AV_LOG_ERROR, "Failed to open report \"%s\": %s\n",
1004	filename.str, strerror(errno));
1005	return ret;
1006	}
1007	av_log_set_callback(log_callback_report);
1008	av_log(NULL, AV_LOG_INFO,
1009	"%s started on %04d-%02d-%02d at %02d:%02d:%02d\n"
1010	"Report written to \"%s\"\n",
1011	program_name,
1012	tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
1013	tm->tm_hour, tm->tm_min, tm->tm_sec,
1014	filename.str);
1015	av_bprint_finalize(&filename, NULL);
1016	return 0;
1017	}
1018
1019	int opt_report(const char *opt)
1020	{
1021	return init_report(NULL);
1022	}
1023
1024	int opt_max_alloc(void *optctx, const char *opt, const char *arg)
1025	{
1026	char *tail;
1027	size_t max;
1028
1029	max = strtol(arg, &tail, 10);
1030	if (*tail) {
1031	av_log(NULL, AV_LOG_FATAL, "Invalid max_alloc \"%s\".\n", arg);
1032	exit_program(1);
1033	}
1034	av_max_alloc(max);
1035	return 0;
1036	}
1037
1038	int opt_timelimit(void *optctx, const char *opt, const char *arg)
1039	{
1040	#if HAVE_SETRLIMIT
1041	int lim = parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
1042	struct rlimit rl = { lim, lim + 1 };
1043	if (setrlimit(RLIMIT_CPU, &rl))
1044	perror("setrlimit");
1045	#else
1046	av_log(NULL, AV_LOG_WARNING, "-%s not implemented on this OS\n", opt);
1047	#endif
1048	return 0;
1049	}
1050
1051	void print_error(const char *filename, int err)
1052	{
1053	char errbuf[128];
1054	const char *errbuf_ptr = errbuf;
1055
1056	if (av_strerror(err, errbuf, sizeof(errbuf)) < 0)
1057	errbuf_ptr = strerror(AVUNERROR(err));
1058	av_log(NULL, AV_LOG_ERROR, "%s: %s\n", filename, errbuf_ptr);
1059	}
1060
1061	static int warned_cfg = 0;
1062
1063	#define INDENT 1
1064	#define SHOW_VERSION 2
1065	#define SHOW_CONFIG 4
1066	#define SHOW_COPYRIGHT 8
1067
1068	#define PRINT_LIB_INFO(libname, LIBNAME, flags, level) \
1069	if (CONFIG_##LIBNAME) { \
1070	const char *indent = flags & INDENT? " " : ""; \
1071	if (flags & SHOW_VERSION) { \
1072	unsigned int version = libname##_version(); \
1073	av_log(NULL, level, \
1074	"%slib%-11s %2d.%3d.%3d / %2d.%3d.%3d\n", \
1075	indent, #libname, \
1076	LIB##LIBNAME##_VERSION_MAJOR, \
1077	LIB##LIBNAME##_VERSION_MINOR, \
1078	LIB##LIBNAME##_VERSION_MICRO, \
1079	AV_VERSION_MAJOR(version), AV_VERSION_MINOR(version),\
1080	AV_VERSION_MICRO(version)); \
1081	} \
1082	if (flags & SHOW_CONFIG) { \
1083	const char *cfg = libname##_configuration(); \
1084	if (strcmp(FFMPEG_CONFIGURATION, cfg)) { \
1085	if (!warned_cfg) { \
1086	av_log(NULL, level, \
1087	"%sWARNING: library configuration mismatch\n", \
1088	indent); \
1089	warned_cfg = 1; \
1090	} \
1091	av_log(NULL, level, "%s%-11s configuration: %s\n", \
1092	indent, #libname, cfg); \
1093	} \
1094	} \
1095	} \
1096
1097	static void print_all_libs_info(int flags, int level)
1098	{
1099	PRINT_LIB_INFO(avutil, AVUTIL, flags, level);
1100	PRINT_LIB_INFO(avcodec, AVCODEC, flags, level);
1101	PRINT_LIB_INFO(avformat, AVFORMAT, flags, level);
1102	PRINT_LIB_INFO(avdevice, AVDEVICE, flags, level);
1103	PRINT_LIB_INFO(avfilter, AVFILTER, flags, level);
1104	PRINT_LIB_INFO(avresample, AVRESAMPLE, flags, level);
1105	PRINT_LIB_INFO(swscale, SWSCALE, flags, level);
1106	PRINT_LIB_INFO(swresample, SWRESAMPLE, flags, level);
1107	PRINT_LIB_INFO(postproc, POSTPROC, flags, level);
1108	}
1109
1110	static void print_program_info(int flags, int level)
1111	{
1112	const char *indent = flags & INDENT? " " : "";
1113
1114	av_log(NULL, level, "%s version " FFMPEG_VERSION, program_name);
1115	if (flags & SHOW_COPYRIGHT)
1116	av_log(NULL, level, " Copyright (c) %d-%d the FFmpeg developers",
1117	program_birth_year, CONFIG_THIS_YEAR);
1118	av_log(NULL, level, "\n");
1119	av_log(NULL, level, "%sbuilt with %s\n", indent, CC_IDENT);
1120
1121	av_log(NULL, level, "%sconfiguration: " FFMPEG_CONFIGURATION "\n", indent);
1122	}
1123
1124	static void print_buildconf(int flags, int level)
1125	{
1126	const char *indent = flags & INDENT ? " " : "";
1127	char str[] = { FFMPEG_CONFIGURATION };
1128	char *conflist, *remove_tilde, *splitconf;
1129
1130	// Change all the ' --' strings to '~--' so that
1131	// they can be identified as tokens.
1132	while ((conflist = strstr(str, " --")) != NULL) {
1133	strncpy(conflist, "~--", 3);
1134	}
1135
1136	// Compensate for the weirdness this would cause
1137	// when passing 'pkg-config --static'.
1138	while ((remove_tilde = strstr(str, "pkg-config~")) != NULL) {
1139	strncpy(remove_tilde, "pkg-config ", 11);
1140	}
1141
1142	splitconf = strtok(str, "~");
1143	av_log(NULL, level, "\n%sconfiguration:\n", indent);
1144	while (splitconf != NULL) {
1145	av_log(NULL, level, "%s%s%s\n", indent, indent, splitconf);
1146	splitconf = strtok(NULL, "~");
1147	}
1148	}
1149
1150	void show_banner(int argc, char **argv, const OptionDef *options)
1151	{
1152	int idx = locate_option(argc, argv, options, "version");
1153	if (hide_banner || idx)
1154	return;
1155
1156	print_program_info (INDENT|SHOW_COPYRIGHT, AV_LOG_INFO);
1157	print_all_libs_info(INDENT|SHOW_CONFIG, AV_LOG_INFO);
1158	print_all_libs_info(INDENT|SHOW_VERSION, AV_LOG_INFO);
1159	}
1160
1161	int show_version(void *optctx, const char *opt, const char *arg)
1162	{
1163	av_log_set_callback(log_callback_help);
1164	print_program_info (SHOW_COPYRIGHT, AV_LOG_INFO);
1165	print_all_libs_info(SHOW_VERSION, AV_LOG_INFO);
1166
1167	return 0;
1168	}
1169
1170	int show_buildconf(void *optctx, const char *opt, const char *arg)
1171	{
1172	av_log_set_callback(log_callback_help);
1173	print_buildconf (INDENT|0, AV_LOG_INFO);
1174
1175	return 0;
1176	}
1177
1178	int show_license(void *optctx, const char *opt, const char *arg)
1179	{
1180	#if CONFIG_NONFREE
1181	printf(
1182	"This version of %s has nonfree parts compiled in.\n"
1183	"Therefore it is not legally redistributable.\n",
1184	program_name );
1185	#elif CONFIG_GPLV3
1186	printf(
1187	"%s is free software; you can redistribute it and/or modify\n"
1188	"it under the terms of the GNU General Public License as published by\n"
1189	"the Free Software Foundation; either version 3 of the License, or\n"
1190	"(at your option) any later version.\n"
1191	"\n"
1192	"%s is distributed in the hope that it will be useful,\n"
1193	"but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
1194	"MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
1195	"GNU General Public License for more details.\n"
1196	"\n"
1197	"You should have received a copy of the GNU General Public License\n"
1198	"along with %s. If not, see <http://www.gnu.org/licenses/>.\n",
1199	program_name, program_name, program_name );
1200	#elif CONFIG_GPL
1201	printf(
1202	"%s is free software; you can redistribute it and/or modify\n"
1203	"it under the terms of the GNU General Public License as published by\n"
1204	"the Free Software Foundation; either version 2 of the License, or\n"
1205	"(at your option) any later version.\n"
1206	"\n"
1207	"%s is distributed in the hope that it will be useful,\n"
1208	"but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
1209	"MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
1210	"GNU General Public License for more details.\n"
1211	"\n"
1212	"You should have received a copy of the GNU General Public License\n"
1213	"along with %s; if not, write to the Free Software\n"
1214	"Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
1215	program_name, program_name, program_name );
1216	#elif CONFIG_LGPLV3
1217	printf(
1218	"%s is free software; you can redistribute it and/or modify\n"
1219	"it under the terms of the GNU Lesser General Public License as published by\n"
1220	"the Free Software Foundation; either version 3 of the License, or\n"
1221	"(at your option) any later version.\n"
1222	"\n"
1223	"%s is distributed in the hope that it will be useful,\n"
1224	"but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
1225	"MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
1226	"GNU Lesser General Public License for more details.\n"
1227	"\n"
1228	"You should have received a copy of the GNU Lesser General Public License\n"
1229	"along with %s. If not, see <http://www.gnu.org/licenses/>.\n",
1230	program_name, program_name, program_name );
1231	#else
1232	printf(
1233	"%s is free software; you can redistribute it and/or\n"
1234	"modify it under the terms of the GNU Lesser General Public\n"
1235	"License as published by the Free Software Foundation; either\n"
1236	"version 2.1 of the License, or (at your option) any later version.\n"
1237	"\n"
1238	"%s is distributed in the hope that it will be useful,\n"
1239	"but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
1240	"MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\n"
1241	"Lesser General Public License for more details.\n"
1242	"\n"
1243	"You should have received a copy of the GNU Lesser General Public\n"
1244	"License along with %s; if not, write to the Free Software\n"
1245	"Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
1246	program_name, program_name, program_name );
1247	#endif
1248
1249	return 0;
1250	}
1251
1252	static int is_device(const AVClass *avclass)
1253	{
1254	if (!avclass)
1255	return 0;
1256	return AV_IS_INPUT_DEVICE(avclass->category) || AV_IS_OUTPUT_DEVICE(avclass->category);
1257	}
1258
1259	static int show_formats_devices(void *optctx, const char *opt, const char *arg, int device_only, int muxdemuxers)
1260	{
1261	AVInputFormat *ifmt = NULL;
1262	AVOutputFormat *ofmt = NULL;
1263	const char *last_name;
1264	int is_dev;
1265
1266	printf("%s\n"
1267	" D. = Demuxing supported\n"
1268	" .E = Muxing supported\n"
1269	" --\n", device_only ? "Devices:" : "File formats:");
1270	last_name = "000";
1271	for (;;) {
1272	int decode = 0;
1273	int encode = 0;
1274	const char *name = NULL;
1275	const char *long_name = NULL;
1276
1277	if (muxdemuxers !=SHOW_DEMUXERS) {
1278	while ((ofmt = av_oformat_next(ofmt))) {
1279	is_dev = is_device(ofmt->priv_class);
1280	if (!is_dev && device_only)
1281	continue;
1282	if ((!name || strcmp(ofmt->name, name) < 0) &&
1283	strcmp(ofmt->name, last_name) > 0) {
1284	name = ofmt->name;
1285	long_name = ofmt->long_name;
1286	encode = 1;
1287	}
1288	}
1289	}
1290	if (muxdemuxers != SHOW_MUXERS) {
1291	while ((ifmt = av_iformat_next(ifmt))) {
1292	is_dev = is_device(ifmt->priv_class);
1293	if (!is_dev && device_only)
1294	continue;
1295	if ((!name || strcmp(ifmt->name, name) < 0) &&
1296	strcmp(ifmt->name, last_name) > 0) {
1297	name = ifmt->name;
1298	long_name = ifmt->long_name;
1299	encode = 0;
1300	}
1301	if (name && strcmp(ifmt->name, name) == 0)
1302	decode = 1;
1303	}
1304	}
1305	if (!name)
1306	break;
1307	last_name = name;
1308
1309	printf(" %s%s %-15s %s\n",
1310	decode ? "D" : " ",
1311	encode ? "E" : " ",
1312	name,
1313	long_name ? long_name:" ");
1314	}
1315	return 0;
1316	}
1317
1318	int show_formats(void *optctx, const char *opt, const char *arg)
1319	{
1320	return show_formats_devices(optctx, opt, arg, 0, SHOW_DEFAULT);
1321	}
1322
1323	int show_muxers(void *optctx, const char *opt, const char *arg)
1324	{
1325	return show_formats_devices(optctx, opt, arg, 0, SHOW_MUXERS);
1326	}
1327
1328	int show_demuxers(void *optctx, const char *opt, const char *arg)
1329	{
1330	return show_formats_devices(optctx, opt, arg, 0, SHOW_DEMUXERS);
1331	}
1332
1333	int show_devices(void *optctx, const char *opt, const char *arg)
1334	{
1335	return show_formats_devices(optctx, opt, arg, 1, SHOW_DEFAULT);
1336	}
1337
1338	#define PRINT_CODEC_SUPPORTED(codec, field, type, list_name, term, get_name) \
1339	if (codec->field) { \
1340	const type *p = codec->field; \
1341	\
1342	printf(" Supported " list_name ":"); \
1343	while (*p != term) { \
1344	get_name(*p); \
1345	printf(" %s", name); \
1346	p++; \
1347	} \
1348	printf("\n"); \
1349	} \
1350
1351	static void print_codec(const AVCodec *c)
1352	{
1353	int encoder = av_codec_is_encoder(c);
1354
1355	printf("%s %s [%s]:\n", encoder ? "Encoder" : "Decoder", c->name,
1356	c->long_name ? c->long_name : "");
1357
1358	printf(" General capabilities: ");
1359	if (c->capabilities & AV_CODEC_CAP_DRAW_HORIZ_BAND)
1360	printf("horizband ");
1361	if (c->capabilities & AV_CODEC_CAP_DR1)
1362	printf("dr1 ");
1363	if (c->capabilities & AV_CODEC_CAP_TRUNCATED)
1364	printf("trunc ");
1365	if (c->capabilities & AV_CODEC_CAP_DELAY)
1366	printf("delay ");
1367	if (c->capabilities & AV_CODEC_CAP_SMALL_LAST_FRAME)
1368	printf("small ");
1369	if (c->capabilities & AV_CODEC_CAP_SUBFRAMES)
1370	printf("subframes ");
1371	if (c->capabilities & AV_CODEC_CAP_EXPERIMENTAL)
1372	printf("exp ");
1373	if (c->capabilities & AV_CODEC_CAP_CHANNEL_CONF)
1374	printf("chconf ");
1375	if (c->capabilities & AV_CODEC_CAP_PARAM_CHANGE)
1376	printf("paramchange ");
1377	if (c->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE)
1378	printf("variable ");
1379	if (c->capabilities & (AV_CODEC_CAP_FRAME_THREADS |
1380	AV_CODEC_CAP_SLICE_THREADS |
1381	AV_CODEC_CAP_AUTO_THREADS))
1382	printf("threads ");
1383	if (!c->capabilities)
1384	printf("none");
1385	printf("\n");
1386
1387	if (c->type == AVMEDIA_TYPE_VIDEO ||
1388	c->type == AVMEDIA_TYPE_AUDIO) {
1389	printf(" Threading capabilities: ");
1390	switch (c->capabilities & (AV_CODEC_CAP_FRAME_THREADS |
1391	AV_CODEC_CAP_SLICE_THREADS |
1392	AV_CODEC_CAP_AUTO_THREADS)) {
1393	case AV_CODEC_CAP_FRAME_THREADS |
1394	AV_CODEC_CAP_SLICE_THREADS: printf("frame and slice"); break;
1395	case AV_CODEC_CAP_FRAME_THREADS: printf("frame"); break;
1396	case AV_CODEC_CAP_SLICE_THREADS: printf("slice"); break;
1397	case AV_CODEC_CAP_AUTO_THREADS : printf("auto"); break;
1398	default: printf("none"); break;
1399	}
1400	printf("\n");
1401	}
1402
1403	if (c->supported_framerates) {
1404	const AVRational *fps = c->supported_framerates;
1405
1406	printf(" Supported framerates:");
1407	while (fps->num) {
1408	printf(" %d/%d", fps->num, fps->den);
1409	fps++;
1410	}
1411	printf("\n");
1412	}
1413	PRINT_CODEC_SUPPORTED(c, pix_fmts, enum AVPixelFormat, "pixel formats",
1414	AV_PIX_FMT_NONE, GET_PIX_FMT_NAME);
1415	PRINT_CODEC_SUPPORTED(c, supported_samplerates, int, "sample rates", 0,
1416	GET_SAMPLE_RATE_NAME);
1417	PRINT_CODEC_SUPPORTED(c, sample_fmts, enum AVSampleFormat, "sample formats",
1418	AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME);
1419	PRINT_CODEC_SUPPORTED(c, channel_layouts, uint64_t, "channel layouts",
1420	0, GET_CH_LAYOUT_DESC);
1421
1422	if (c->priv_class) {
1423	show_help_children(c->priv_class,
1424	AV_OPT_FLAG_ENCODING_PARAM |
1425	AV_OPT_FLAG_DECODING_PARAM);
1426	}
1427	}
1428
1429	static char get_media_type_char(enum AVMediaType type)
1430	{
1431	switch (type) {
1432	case AVMEDIA_TYPE_VIDEO: return 'V';
1433	case AVMEDIA_TYPE_AUDIO: return 'A';
1434	case AVMEDIA_TYPE_DATA: return 'D';
1435	case AVMEDIA_TYPE_SUBTITLE: return 'S';
1436	case AVMEDIA_TYPE_ATTACHMENT:return 'T';
1437	default: return '?';
1438	}
1439	}
1440
1441	static const AVCodec *next_codec_for_id(enum AVCodecID id, const AVCodec *prev,
1442	int encoder)
1443	{
1444	while ((prev = av_codec_next(prev))) {
1445	if (prev->id == id &&
1446	(encoder ? av_codec_is_encoder(prev) : av_codec_is_decoder(prev)))
1447	return prev;
1448	}
1449	return NULL;
1450	}
1451
1452	static int compare_codec_desc(const void *a, const void *b)
1453	{
1454	const AVCodecDescriptor * const *da = a;
1455	const AVCodecDescriptor * const *db = b;
1456
1457	return (*da)->type != (*db)->type ? FFDIFFSIGN((*da)->type, (*db)->type) :
1458	strcmp((*da)->name, (*db)->name);
1459	}
1460
1461	static unsigned get_codecs_sorted(const AVCodecDescriptor ***rcodecs)
1462	{
1463	const AVCodecDescriptor *desc = NULL;
1464	const AVCodecDescriptor **codecs;
1465	unsigned nb_codecs = 0, i = 0;
1466
1467	while ((desc = avcodec_descriptor_next(desc)))
1468	nb_codecs++;
1469	if (!(codecs = av_calloc(nb_codecs, sizeof(*codecs)))) {
1470	av_log(NULL, AV_LOG_ERROR, "Out of memory\n");
1471	exit_program(1);
1472	}
1473	desc = NULL;
1474	while ((desc = avcodec_descriptor_next(desc)))
1475	codecs[i++] = desc;
1476	av_assert0(i == nb_codecs);
1477	qsort(codecs, nb_codecs, sizeof(*codecs), compare_codec_desc);
1478	*rcodecs = codecs;
1479	return nb_codecs;
1480	}
1481
1482	static void print_codecs_for_id(enum AVCodecID id, int encoder)
1483	{
1484	const AVCodec *codec = NULL;
1485
1486	printf(" (%s: ", encoder ? "encoders" : "decoders");
1487
1488	while ((codec = next_codec_for_id(id, codec, encoder)))
1489	printf("%s ", codec->name);
1490
1491	printf(")");
1492	}
1493
1494	int show_codecs(void *optctx, const char *opt, const char *arg)
1495	{
1496	const AVCodecDescriptor **codecs;
1497	unsigned i, nb_codecs = get_codecs_sorted(&codecs);
1498
1499	printf("Codecs:\n"
1500	" D..... = Decoding supported\n"
1501	" .E.... = Encoding supported\n"
1502	" ..V... = Video codec\n"
1503	" ..A... = Audio codec\n"
1504	" ..S... = Subtitle codec\n"
1505	" ...I.. = Intra frame-only codec\n"
1506	" ....L. = Lossy compression\n"
1507	" .....S = Lossless compression\n"
1508	" -------\n");
1509	for (i = 0; i < nb_codecs; i++) {
1510	const AVCodecDescriptor *desc = codecs[i];
1511	const AVCodec *codec = NULL;
1512
1513	if (strstr(desc->name, "_deprecated"))
1514	continue;
1515
1516	printf(" ");
1517	printf(avcodec_find_decoder(desc->id) ? "D" : ".");
1518	printf(avcodec_find_encoder(desc->id) ? "E" : ".");
1519
1520	printf("%c", get_media_type_char(desc->type));
1521	printf((desc->props & AV_CODEC_PROP_INTRA_ONLY) ? "I" : ".");
1522	printf((desc->props & AV_CODEC_PROP_LOSSY) ? "L" : ".");
1523	printf((desc->props & AV_CODEC_PROP_LOSSLESS) ? "S" : ".");
1524
1525	printf(" %-20s %s", desc->name, desc->long_name ? desc->long_name : "");
1526
1527	/* print decoders/encoders when there's more than one or their
1528	* names are different from codec name */
1529	while ((codec = next_codec_for_id(desc->id, codec, 0))) {
1530	if (strcmp(codec->name, desc->name)) {
1531	print_codecs_for_id(desc->id, 0);
1532	break;
1533	}
1534	}
1535	codec = NULL;
1536	while ((codec = next_codec_for_id(desc->id, codec, 1))) {
1537	if (strcmp(codec->name, desc->name)) {
1538	print_codecs_for_id(desc->id, 1);
1539	break;
1540	}
1541	}
1542
1543	printf("\n");
1544	}
1545	av_free(codecs);
1546	return 0;
1547	}
1548
1549	static void print_codecs(int encoder)
1550	{
1551	const AVCodecDescriptor **codecs;
1552	unsigned i, nb_codecs = get_codecs_sorted(&codecs);
1553
1554	printf("%s:\n"
1555	" V..... = Video\n"
1556	" A..... = Audio\n"
1557	" S..... = Subtitle\n"
1558	" .F.... = Frame-level multithreading\n"
1559	" ..S... = Slice-level multithreading\n"
1560	" ...X.. = Codec is experimental\n"
1561	" ....B. = Supports draw_horiz_band\n"
1562	" .....D = Supports direct rendering method 1\n"
1563	" ------\n",
1564	encoder ? "Encoders" : "Decoders");
1565	for (i = 0; i < nb_codecs; i++) {
1566	const AVCodecDescriptor *desc = codecs[i];
1567	const AVCodec *codec = NULL;
1568
1569	while ((codec = next_codec_for_id(desc->id, codec, encoder))) {
1570	printf(" %c", get_media_type_char(desc->type));
1571	printf((codec->capabilities & AV_CODEC_CAP_FRAME_THREADS) ? "F" : ".");
1572	printf((codec->capabilities & AV_CODEC_CAP_SLICE_THREADS) ? "S" : ".");
1573	printf((codec->capabilities & AV_CODEC_CAP_EXPERIMENTAL) ? "X" : ".");
1574	printf((codec->capabilities & AV_CODEC_CAP_DRAW_HORIZ_BAND)?"B" : ".");
1575	printf((codec->capabilities & AV_CODEC_CAP_DR1) ? "D" : ".");
1576
1577	printf(" %-20s %s", codec->name, codec->long_name ? codec->long_name : "");
1578	if (strcmp(codec->name, desc->name))
1579	printf(" (codec %s)", desc->name);
1580
1581	printf("\n");
1582	}
1583	}
1584	av_free(codecs);
1585	}
1586
1587	int show_decoders(void *optctx, const char *opt, const char *arg)
1588	{
1589	print_codecs(0);
1590	return 0;
1591	}
1592
1593	int show_encoders(void *optctx, const char *opt, const char *arg)
1594	{
1595	print_codecs(1);
1596	return 0;
1597	}
1598
1599	int show_bsfs(void *optctx, const char *opt, const char *arg)
1600	{
1601	const AVBitStreamFilter *bsf = NULL;
1602	void *opaque = NULL;
1603
1604	printf("Bitstream filters:\n");
1605	while ((bsf = av_bsf_next(&opaque)))
1606	printf("%s\n", bsf->name);
1607	printf("\n");
1608	return 0;
1609	}
1610
1611	int show_protocols(void *optctx, const char *opt, const char *arg)
1612	{
1613	void *opaque = NULL;
1614	const char *name;
1615
1616	printf("Supported file protocols:\n"
1617	"Input:\n");
1618	while ((name = avio_enum_protocols(&opaque, 0)))
1619	printf(" %s\n", name);
1620	printf("Output:\n");
1621	while ((name = avio_enum_protocols(&opaque, 1)))
1622	printf(" %s\n", name);
1623	return 0;
1624	}
1625
1626	int show_filters(void *optctx, const char *opt, const char *arg)
1627	{
1628	#if CONFIG_AVFILTER
1629	const AVFilter *filter = NULL;
1630	char descr[64], *descr_cur;
1631	int i, j;
1632	const AVFilterPad *pad;
1633
1634	printf("Filters:\n"
1635	" T.. = Timeline support\n"
1636	" .S. = Slice threading\n"
1637	" ..C = Command support\n"
1638	" A = Audio input/output\n"
1639	" V = Video input/output\n"
1640	" N = Dynamic number and/or type of input/output\n"
1641	" | = Source or sink filter\n");
1642	while ((filter = avfilter_next(filter))) {
1643	descr_cur = descr;
1644	for (i = 0; i < 2; i++) {
1645	if (i) {
1646	*(descr_cur++) = '-';
1647	*(descr_cur++) = '>';
1648	}
1649	pad = i ? filter->outputs : filter->inputs;
1650	for (j = 0; pad && avfilter_pad_get_name(pad, j); j++) {
1651	if (descr_cur >= descr + sizeof(descr) - 4)
1652	break;
1653	*(descr_cur++) = get_media_type_char(avfilter_pad_get_type(pad, j));
1654	}
1655	if (!j)
1656	*(descr_cur++) = ((!i && (filter->flags & AVFILTER_FLAG_DYNAMIC_INPUTS)) ||
1657	( i && (filter->flags & AVFILTER_FLAG_DYNAMIC_OUTPUTS))) ? 'N' : '|';
1658	}
1659	*descr_cur = 0;
1660	printf(" %c%c%c %-17s %-10s %s\n",
1661	filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE ? 'T' : '.',
1662	filter->flags & AVFILTER_FLAG_SLICE_THREADS ? 'S' : '.',
1663	filter->process_command ? 'C' : '.',
1664	filter->name, descr, filter->description);
1665	}
1666	#else
1667	printf("No filters available: libavfilter disabled\n");
1668	#endif
1669	return 0;
1670	}
1671
1672	int show_colors(void *optctx, const char *opt, const char *arg)
1673	{
1674	const char *name;
1675	const uint8_t *rgb;
1676	int i;
1677
1678	printf("%-32s #RRGGBB\n", "name");
1679
1680	for (i = 0; name = av_get_known_color_name(i, &rgb); i++)
1681	printf("%-32s #%02x%02x%02x\n", name, rgb[0], rgb[1], rgb[2]);
1682
1683	return 0;
1684	}
1685
1686	int show_pix_fmts(void *optctx, const char *opt, const char *arg)
1687	{
1688	const AVPixFmtDescriptor *pix_desc = NULL;
1689
1690	printf("Pixel formats:\n"
1691	"I.... = Supported Input format for conversion\n"
1692	".O... = Supported Output format for conversion\n"
1693	"..H.. = Hardware accelerated format\n"
1694	"...P. = Paletted format\n"
1695	"....B = Bitstream format\n"
1696	"FLAGS NAME NB_COMPONENTS BITS_PER_PIXEL\n"
1697	"-----\n");
1698
1699	#if !CONFIG_SWSCALE
1700	# define sws_isSupportedInput(x) 0
1701	# define sws_isSupportedOutput(x) 0
1702	#endif
1703
1704	while ((pix_desc = av_pix_fmt_desc_next(pix_desc))) {
1705	enum AVPixelFormat pix_fmt = av_pix_fmt_desc_get_id(pix_desc);
1706	printf("%c%c%c%c%c %-16s %d %2d\n",
1707	sws_isSupportedInput (pix_fmt) ? 'I' : '.',
1708	sws_isSupportedOutput(pix_fmt) ? 'O' : '.',
1709	pix_desc->flags & AV_PIX_FMT_FLAG_HWACCEL ? 'H' : '.',
1710	pix_desc->flags & AV_PIX_FMT_FLAG_PAL ? 'P' : '.',
1711	pix_desc->flags & AV_PIX_FMT_FLAG_BITSTREAM ? 'B' : '.',
1712	pix_desc->name,
1713	pix_desc->nb_components,
1714	av_get_bits_per_pixel(pix_desc));
1715	}
1716	return 0;
1717	}
1718
1719	int show_layouts(void *optctx, const char *opt, const char *arg)
1720	{
1721	int i = 0;
1722	uint64_t layout, j;
1723	const char *name, *descr;
1724
1725	printf("Individual channels:\n"
1726	"NAME DESCRIPTION\n");
1727	for (i = 0; i < 63; i++) {
1728	name = av_get_channel_name((uint64_t)1 << i);
1729	if (!name)
1730	continue;
1731	descr = av_get_channel_description((uint64_t)1 << i);
1732	printf("%-14s %s\n", name, descr);
1733	}
1734	printf("\nStandard channel layouts:\n"
1735	"NAME DECOMPOSITION\n");
1736	for (i = 0; !av_get_standard_channel_layout(i, &layout, &name); i++) {
1737	if (name) {
1738	printf("%-14s ", name);
1739	for (j = 1; j; j <<= 1)
1740	if ((layout & j))
1741	printf("%s%s", (layout & (j - 1)) ? "+" : "", av_get_channel_name(j));
1742	printf("\n");
1743	}
1744	}
1745	return 0;
1746	}
1747
1748	int show_sample_fmts(void *optctx, const char *opt, const char *arg)
1749	{
1750	int i;
1751	char fmt_str[128];
1752	for (i = -1; i < AV_SAMPLE_FMT_NB; i++)
1753	printf("%s\n", av_get_sample_fmt_string(fmt_str, sizeof(fmt_str), i));
1754	return 0;
1755	}
1756
1757	static void show_help_codec(const char *name, int encoder)
1758	{
1759	const AVCodecDescriptor *desc;
1760	const AVCodec *codec;
1761
1762	if (!name) {
1763	av_log(NULL, AV_LOG_ERROR, "No codec name specified.\n");
1764	return;
1765	}
1766
1767	codec = encoder ? avcodec_find_encoder_by_name(name) :
1768	avcodec_find_decoder_by_name(name);
1769
1770	if (codec)
1771	print_codec(codec);
1772	else if ((desc = avcodec_descriptor_get_by_name(name))) {
1773	int printed = 0;
1774
1775	while ((codec = next_codec_for_id(desc->id, codec, encoder))) {
1776	printed = 1;
1777	print_codec(codec);
1778	}
1779
1780	if (!printed) {
1781	av_log(NULL, AV_LOG_ERROR, "Codec '%s' is known to FFmpeg, "
1782	"but no %s for it are available. FFmpeg might need to be "
1783	"recompiled with additional external libraries.\n",
1784	name, encoder ? "encoders" : "decoders");
1785	}
1786	} else {
1787	av_log(NULL, AV_LOG_ERROR, "Codec '%s' is not recognized by FFmpeg.\n",
1788	name);
1789	}
1790	}
1791
1792	static void show_help_demuxer(const char *name)
1793	{
1794	const AVInputFormat *fmt = av_find_input_format(name);
1795
1796	if (!fmt) {
1797	av_log(NULL, AV_LOG_ERROR, "Unknown format '%s'.\n", name);
1798	return;
1799	}
1800
1801	printf("Demuxer %s [%s]:\n", fmt->name, fmt->long_name);
1802
1803	if (fmt->extensions)
1804	printf(" Common extensions: %s.\n", fmt->extensions);
1805
1806	if (fmt->priv_class)
1807	show_help_children(fmt->priv_class, AV_OPT_FLAG_DECODING_PARAM);
1808	}
1809
1810	static void show_help_muxer(const char *name)
1811	{
1812	const AVCodecDescriptor *desc;
1813	const AVOutputFormat *fmt = av_guess_format(name, NULL, NULL);
1814
1815	if (!fmt) {
1816	av_log(NULL, AV_LOG_ERROR, "Unknown format '%s'.\n", name);
1817	return;
1818	}
1819
1820	printf("Muxer %s [%s]:\n", fmt->name, fmt->long_name);
1821
1822	if (fmt->extensions)
1823	printf(" Common extensions: %s.\n", fmt->extensions);
1824	if (fmt->mime_type)
1825	printf(" Mime type: %s.\n", fmt->mime_type);
1826	if (fmt->video_codec != AV_CODEC_ID_NONE &&
1827	(desc = avcodec_descriptor_get(fmt->video_codec))) {
1828	printf(" Default video codec: %s.\n", desc->name);
1829	}
1830	if (fmt->audio_codec != AV_CODEC_ID_NONE &&
1831	(desc = avcodec_descriptor_get(fmt->audio_codec))) {
1832	printf(" Default audio codec: %s.\n", desc->name);
1833	}
1834	if (fmt->subtitle_codec != AV_CODEC_ID_NONE &&
1835	(desc = avcodec_descriptor_get(fmt->subtitle_codec))) {
1836	printf(" Default subtitle codec: %s.\n", desc->name);
1837	}
1838
1839	if (fmt->priv_class)
1840	show_help_children(fmt->priv_class, AV_OPT_FLAG_ENCODING_PARAM);
1841	}
1842
1843	#if CONFIG_AVFILTER
1844	static void show_help_filter(const char *name)
1845	{
1846	#if CONFIG_AVFILTER
1847	const AVFilter *f = avfilter_get_by_name(name);
1848	int i, count;
1849
1850	if (!name) {
1851	av_log(NULL, AV_LOG_ERROR, "No filter name specified.\n");
1852	return;
1853	} else if (!f) {
1854	av_log(NULL, AV_LOG_ERROR, "Unknown filter '%s'.\n", name);
1855	return;
1856	}
1857
1858	printf("Filter %s\n", f->name);
1859	if (f->description)
1860	printf(" %s\n", f->description);
1861
1862	if (f->flags & AVFILTER_FLAG_SLICE_THREADS)
1863	printf(" slice threading supported\n");
1864
1865	printf(" Inputs:\n");
1866	count = avfilter_pad_count(f->inputs);
1867	for (i = 0; i < count; i++) {
1868	printf(" #%d: %s (%s)\n", i, avfilter_pad_get_name(f->inputs, i),
1869	media_type_string(avfilter_pad_get_type(f->inputs, i)));
1870	}
1871	if (f->flags & AVFILTER_FLAG_DYNAMIC_INPUTS)
1872	printf(" dynamic (depending on the options)\n");
1873	else if (!count)
1874	printf(" none (source filter)\n");
1875
1876	printf(" Outputs:\n");
1877	count = avfilter_pad_count(f->outputs);
1878	for (i = 0; i < count; i++) {
1879	printf(" #%d: %s (%s)\n", i, avfilter_pad_get_name(f->outputs, i),
1880	media_type_string(avfilter_pad_get_type(f->outputs, i)));
1881	}
1882	if (f->flags & AVFILTER_FLAG_DYNAMIC_OUTPUTS)
1883	printf(" dynamic (depending on the options)\n");
1884	else if (!count)
1885	printf(" none (sink filter)\n");
1886
1887	if (f->priv_class)
1888	show_help_children(f->priv_class, AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM |
1889	AV_OPT_FLAG_AUDIO_PARAM);
1890	if (f->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)
1891	printf("This filter has support for timeline through the 'enable' option.\n");
1892	#else
1893	av_log(NULL, AV_LOG_ERROR, "Build without libavfilter; "
1894	"can not to satisfy request\n");
1895	#endif
1896	}
1897	#endif
1898
1899	int show_help(void *optctx, const char *opt, const char *arg)
1900	{
1901	char *topic, *par;
1902	av_log_set_callback(log_callback_help);
1903
1904	topic = av_strdup(arg ? arg : "");
1905	if (!topic)
1906	return AVERROR(ENOMEM);
1907	par = strchr(topic, '=');
1908	if (par)
1909	*par++ = 0;
1910
1911	if (!*topic) {
1912	show_help_default(topic, par);
1913	} else if (!strcmp(topic, "decoder")) {
1914	show_help_codec(par, 0);
1915	} else if (!strcmp(topic, "encoder")) {
1916	show_help_codec(par, 1);
1917	} else if (!strcmp(topic, "demuxer")) {
1918	show_help_demuxer(par);
1919	} else if (!strcmp(topic, "muxer")) {
1920	show_help_muxer(par);
1921	#if CONFIG_AVFILTER
1922	} else if (!strcmp(topic, "filter")) {
1923	show_help_filter(par);
1924	#endif
1925	} else {
1926	show_help_default(topic, par);
1927	}
1928
1929	av_freep(&topic);
1930	return 0;
1931	}
1932
1933	int read_yesno(void)
1934	{
1935	int c = getchar();
1936	int yesno = (av_toupper(c) == 'Y');
1937
1938	while (c != '\n' && c != EOF)
1939	c = getchar();
1940
1941	return yesno;
1942	}
1943
1944	FILE *get_preset_file(char *filename, size_t filename_size,
1945	const char *preset_name, int is_path,
1946	const char *codec_name)
1947	{
1948	FILE *f = NULL;
1949	int i;
1950	const char *base[3] = { getenv("FFMPEG_DATADIR"),
1951	getenv("HOME"),
1952	FFMPEG_DATADIR, };
1953
1954	if (is_path) {
1955	av_strlcpy(filename, preset_name, filename_size);
1956	f = fopen(filename, "r");
1957	} else {
1958	#ifdef _WIN32
1959	char datadir[MAX_PATH], *ls;
1960	base[2] = NULL;
1961
1962	if (GetModuleFileNameA(GetModuleHandleA(NULL), datadir, sizeof(datadir) - 1))
1963	{
1964	for (ls = datadir; ls < datadir + strlen(datadir); ls++)
1965	if (*ls == '\\') *ls = '/';
1966
1967	if (ls = strrchr(datadir, '/'))
1968	{
1969	*ls = 0;
1970	strncat(datadir, "/ffpresets", sizeof(datadir) - 1 - strlen(datadir));
1971	base[2] = datadir;
1972	}
1973	}
1974	#endif
1975	for (i = 0; i < 3 && !f; i++) {
1976	if (!base[i])
1977	continue;
1978	snprintf(filename, filename_size, "%s%s/%s.ffpreset", base[i],
1979	i != 1 ? "" : "/.ffmpeg", preset_name);
1980	f = fopen(filename, "r");
1981	if (!f && codec_name) {
1982	snprintf(filename, filename_size,
1983	"%s%s/%s-%s.ffpreset",
1984	base[i], i != 1 ? "" : "/.ffmpeg", codec_name,
1985	preset_name);
1986	f = fopen(filename, "r");
1987	}
1988	}
1989	}
1990
1991	return f;
1992	}
1993
1994	int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
1995	{
1996	int ret = avformat_match_stream_specifier(s, st, spec);
1997	if (ret < 0)
1998	av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
1999	return ret;
2000	}
2001
2002	AVDictionary *filter_codec_opts(AVDictionary *opts, enum AVCodecID codec_id,
2003	AVFormatContext *s, AVStream *st, AVCodec *codec)
2004	{
2005	AVDictionary *ret = NULL;
2006	AVDictionaryEntry *t = NULL;
2007	int flags = s->oformat ? AV_OPT_FLAG_ENCODING_PARAM
2008	: AV_OPT_FLAG_DECODING_PARAM;
2009	char prefix = 0;
2010	const AVClass *cc = avcodec_get_class();
2011
2012	if (!codec)
2013	codec = s->oformat ? avcodec_find_encoder(codec_id)
2014	: avcodec_find_decoder(codec_id);
2015
2016	switch (st->codecpar->codec_type) {
2017	case AVMEDIA_TYPE_VIDEO:
2018	prefix = 'v';
2019	flags |= AV_OPT_FLAG_VIDEO_PARAM;
2020	break;
2021	case AVMEDIA_TYPE_AUDIO:
2022	prefix = 'a';
2023	flags |= AV_OPT_FLAG_AUDIO_PARAM;
2024	break;
2025	case AVMEDIA_TYPE_SUBTITLE:
2026	prefix = 's';
2027	flags |= AV_OPT_FLAG_SUBTITLE_PARAM;
2028	break;
2029	}
2030
2031	while (t = av_dict_get(opts, "", t, AV_DICT_IGNORE_SUFFIX)) {
2032	char *p = strchr(t->key, ':');
2033
2034	/* check stream specification in opt name */
2035	if (p)
2036	switch (check_stream_specifier(s, st, p + 1)) {
2037	case 1: *p = 0; break;
2038	case 0: continue;
2039	default: exit_program(1);
2040	}
2041
2042	if (av_opt_find(&cc, t->key, NULL, flags, AV_OPT_SEARCH_FAKE_OBJ) ||
2043	!codec ||
2044	(codec->priv_class &&
2045	av_opt_find(&codec->priv_class, t->key, NULL, flags,
2046	AV_OPT_SEARCH_FAKE_OBJ)))
2047	av_dict_set(&ret, t->key, t->value, 0);
2048	else if (t->key[0] == prefix &&
2049	av_opt_find(&cc, t->key + 1, NULL, flags,
2050	AV_OPT_SEARCH_FAKE_OBJ))
2051	av_dict_set(&ret, t->key + 1, t->value, 0);
2052
2053	if (p)
2054	*p = ':';
2055	}
2056	return ret;
2057	}
2058
2059	AVDictionary **setup_find_stream_info_opts(AVFormatContext *s,
2060	AVDictionary *codec_opts)
2061	{
2062	int i;
2063	AVDictionary **opts;
2064
2065	if (!s->nb_streams)
2066	return NULL;
2067	opts = av_mallocz_array(s->nb_streams, sizeof(*opts));
2068	if (!opts) {
2069	av_log(NULL, AV_LOG_ERROR,
2070	"Could not alloc memory for stream options.\n");
2071	return NULL;
2072	}
2073	for (i = 0; i < s->nb_streams; i++)
2074	opts[i] = filter_codec_opts(codec_opts, s->streams[i]->codecpar->codec_id,
2075	s, s->streams[i], NULL);
2076	return opts;
2077	}
2078
2079	void *grow_array(void *array, int elem_size, int *size, int new_size)
2080	{
2081	if (new_size >= INT_MAX / elem_size) {
2082	av_log(NULL, AV_LOG_ERROR, "Array too big.\n");
2083	exit_program(1);
2084	}
2085	if (*size < new_size) {
2086	uint8_t *tmp = av_realloc_array(array, new_size, elem_size);
2087	if (!tmp) {
2088	av_log(NULL, AV_LOG_ERROR, "Could not alloc buffer.\n");
2089	exit_program(1);
2090	}
2091	memset(tmp + *size*elem_size, 0, (new_size-*size) * elem_size);
2092	*size = new_size;
2093	return tmp;
2094	}
2095	return array;
2096	}
2097
2098	double get_rotation(AVStream *st)
2099	{
2100	uint8_t* displaymatrix = av_stream_get_side_data(st,
2101	AV_PKT_DATA_DISPLAYMATRIX, NULL);
2102	double theta = 0;
2103	if (displaymatrix)
2104	theta = -av_display_rotation_get((int32_t*) displaymatrix);
2105
2106	theta -= 360*floor(theta/360 + 0.9/360);
2107
2108	if (fabs(theta - 90*round(theta/90)) > 2)
2109	av_log(NULL, AV_LOG_WARNING, "Odd rotation angle.\n"
2110	"If you want to help, upload a sample "
2111	"of this file to ftp://upload.ffmpeg.org/incoming/ "
2112	"and contact the ffmpeg-devel mailing list. (ffmpeg-devel@ffmpeg.org)");
2113
2114	return theta;
2115	}
2116
2117	#if CONFIG_AVDEVICE
2118	static int print_device_sources(AVInputFormat *fmt, AVDictionary *opts)
2119	{
2120	int ret, i;
2121	AVDeviceInfoList *device_list = NULL;
2122
2123	if (!fmt || !fmt->priv_class || !AV_IS_INPUT_DEVICE(fmt->priv_class->category))
2124	return AVERROR(EINVAL);
2125
2126	printf("Auto-detected sources for %s:\n", fmt->name);
2127	if (!fmt->get_device_list) {
2128	ret = AVERROR(ENOSYS);
2129	printf("Cannot list sources. Not implemented.\n");
2130	goto fail;
2131	}
2132
2133	if ((ret = avdevice_list_input_sources(fmt, NULL, opts, &device_list)) < 0) {
2134	printf("Cannot list sources.\n");
2135	goto fail;
2136	}
2137
2138	for (i = 0; i < device_list->nb_devices; i++) {
2139	printf("%s %s [%s]\n", device_list->default_device == i ? "*" : " ",
2140	device_list->devices[i]->device_name, device_list->devices[i]->device_description);
2141	}
2142
2143	fail:
2144	avdevice_free_list_devices(&device_list);
2145	return ret;
2146	}
2147
2148	static int print_device_sinks(AVOutputFormat *fmt, AVDictionary *opts)
2149	{
2150	int ret, i;
2151	AVDeviceInfoList *device_list = NULL;
2152
2153	if (!fmt || !fmt->priv_class || !AV_IS_OUTPUT_DEVICE(fmt->priv_class->category))
2154	return AVERROR(EINVAL);
2155
2156	printf("Auto-detected sinks for %s:\n", fmt->name);
2157	if (!fmt->get_device_list) {
2158	ret = AVERROR(ENOSYS);
2159	printf("Cannot list sinks. Not implemented.\n");
2160	goto fail;
2161	}
2162
2163	if ((ret = avdevice_list_output_sinks(fmt, NULL, opts, &device_list)) < 0) {
2164	printf("Cannot list sinks.\n");
2165	goto fail;
2166	}
2167
2168	for (i = 0; i < device_list->nb_devices; i++) {
2169	printf("%s %s [%s]\n", device_list->default_device == i ? "*" : " ",
2170	device_list->devices[i]->device_name, device_list->devices[i]->device_description);
2171	}
2172
2173	fail:
2174	avdevice_free_list_devices(&device_list);
2175	return ret;
2176	}
2177
2178	static int show_sinks_sources_parse_arg(const char *arg, char **dev, AVDictionary **opts)
2179	{
2180	int ret;
2181	if (arg) {
2182	char *opts_str = NULL;
2183	av_assert0(dev && opts);
2184	*dev = av_strdup(arg);
2185	if (!*dev)
2186	return AVERROR(ENOMEM);
2187	if ((opts_str = strchr(*dev, ','))) {
2188	*(opts_str++) = '\0';
2189	if (opts_str[0] && ((ret = av_dict_parse_string(opts, opts_str, "=", ":", 0)) < 0)) {
2190	av_freep(dev);
2191	return ret;
2192	}
2193	}
2194	} else
2195	printf("\nDevice name is not provided.\n"
2196	"You can pass devicename[,opt1=val1[,opt2=val2...]] as an argument.\n\n");
2197	return 0;
2198	}
2199
2200	int show_sources(void *optctx, const char *opt, const char *arg)
2201	{
2202	AVInputFormat *fmt = NULL;
2203	char *dev = NULL;
2204	AVDictionary *opts = NULL;
2205	int ret = 0;
2206	int error_level = av_log_get_level();
2207
2208	av_log_set_level(AV_LOG_ERROR);
2209
2210	if ((ret = show_sinks_sources_parse_arg(arg, &dev, &opts)) < 0)
2211	goto fail;
2212
2213	do {
2214	fmt = av_input_audio_device_next(fmt);
2215	if (fmt) {
2216	if (!strcmp(fmt->name, "lavfi"))
2217	continue; //it's pointless to probe lavfi
2218	if (dev && !av_match_name(dev, fmt->name))
2219	continue;
2220	print_device_sources(fmt, opts);
2221	}
2222	} while (fmt);
2223	do {
2224	fmt = av_input_video_device_next(fmt);
2225	if (fmt) {
2226	if (dev && !av_match_name(dev, fmt->name))
2227	continue;
2228	print_device_sources(fmt, opts);
2229	}
2230	} while (fmt);
2231	fail:
2232	av_dict_free(&opts);
2233	av_free(dev);
2234	av_log_set_level(error_level);
2235	return ret;
2236	}
2237
2238	int show_sinks(void *optctx, const char *opt, const char *arg)
2239	{
2240	AVOutputFormat *fmt = NULL;
2241	char *dev = NULL;
2242	AVDictionary *opts = NULL;
2243	int ret = 0;
2244	int error_level = av_log_get_level();
2245
2246	av_log_set_level(AV_LOG_ERROR);
2247
2248	if ((ret = show_sinks_sources_parse_arg(arg, &dev, &opts)) < 0)
2249	goto fail;
2250
2251	do {
2252	fmt = av_output_audio_device_next(fmt);
2253	if (fmt) {
2254	if (dev && !av_match_name(dev, fmt->name))
2255	continue;
2256	print_device_sinks(fmt, opts);
2257	}
2258	} while (fmt);
2259	do {
2260	fmt = av_output_video_device_next(fmt);
2261	if (fmt) {
2262	if (dev && !av_match_name(dev, fmt->name))
2263	continue;
2264	print_device_sinks(fmt, opts);
2265	}
2266	} while (fmt);
2267	fail:
2268	av_dict_free(&opts);
2269	av_free(dev);
2270	av_log_set_level(error_level);
2271	return ret;
2272	}
2273
2274	#endif
2275