cmdutils.c File Reference

#include <string.h>
#include <stdint.h>
#include <stdlib.h>
#include <errno.h>
#include <math.h>
#include "config.h"
#include "compat/va_copy.h"
#include "libavformat/avformat.h"
#include "libavfilter/avfilter.h"
#include "libavdevice/avdevice.h"
#include "libavresample/avresample.h"
#include "libswscale/swscale.h"
#include "libswresample/swresample.h"
#include "libpostproc/postprocess.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/display.h"
#include "libavutil/mathematics.h"
#include "libavutil/imgutils.h"
#include "libavutil/libm.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/eval.h"
#include "libavutil/dict.h"
#include "libavutil/opt.h"
#include "libavutil/cpu.h"
#include "libavutil/ffversion.h"
#include "cmdutils.h"

Go to the source code of this file.

Macros
#define	FLAGS   (o->type == AV_OPT_TYPE_FLAGS && (arg[0]=='-' || arg[0]=='+')) ? AV_DICT_APPEND : 0
#define	GET_ARG(arg)
#define	INDENT   1
#define	SHOW_VERSION   2
#define	SHOW_CONFIG   4
#define	SHOW_COPYRIGHT   8
#define	PRINT_LIB_INFO(libname, LIBNAME, flags, level)
#define	PRINT_CODEC_SUPPORTED(codec, field, type, list_name, term, get_name)
#define	sws_isSupportedInput(x)   0
#define	sws_isSupportedOutput(x)   0

Functions
static int	init_report (const char *env)
void	init_opts (void)
	Initialize the cmdutils option system, in particular allocate the *_opts contexts. More...
void	uninit_opts (void)
	Uninitialize the cmdutils option system, in particular free the *_opts contexts and their contents. More...
void	log_callback_help (void *ptr, int level, const char *fmt, va_list vl)
	Trivial log callback. More...
static void	log_callback_report (void *ptr, int level, const char *fmt, va_list vl)
void	register_exit (void(*cb)(int ret))
	Register a program-specific cleanup routine. More...
void	exit_program (int ret)
	Wraps exit with a program-specific cleanup routine. More...
double	parse_number_or_die (const char *context, const char *numstr, int type, double min, double max)
	Parse a string and return its corresponding value as a double. More...
int64_t	parse_time_or_die (const char *context, const char *timestr, int is_duration)
	Parse a string specifying a time and return its corresponding value as a number of microseconds. More...
void	show_help_options (const OptionDef *options, const char *msg, int req_flags, int rej_flags, int alt_flags)
	Print help for all options matching specified flags. More...
void	show_help_children (const AVClass *class, int flags)
	Show help for all options with given flags in class and all its children. More...
static const OptionDef *	find_option (const OptionDef *po, const char *name)
static void	prepare_app_arguments (int *argc_ptr, char ***argv_ptr)
static int	write_option (void *optctx, const OptionDef *po, const char *opt, const char *arg)
int	parse_option (void *optctx, const char *opt, const char *arg, const OptionDef *options)
	Parse one given option. More...
void	parse_options (void *optctx, int argc, char **argv, const OptionDef *options, void(*parse_arg_function)(void *, const char *))
int	parse_optgroup (void *optctx, OptionGroup *g)
	Parse an options group and write results into optctx. More...
int	locate_option (int argc, char **argv, const OptionDef *options, const char *optname)
	Return index of option opt in argv or 0 if not found. More...
static void	dump_argument (const char *a)
static void	check_options (const OptionDef *po)
void	parse_loglevel (int argc, char **argv, const OptionDef *options)
	Find the '-loglevel' option in the command line args and apply it. More...
static const AVOption *	opt_find (void *obj, const char *name, const char *unit, int opt_flags, int search_flags)
int	opt_default (void *optctx, const char *opt, const char *arg)
	Fallback for options that are not explicitly handled, these will be parsed through AVOptions. More...
static int	match_group_separator (const OptionGroupDef *groups, int nb_groups, const char *opt)
static void	finish_group (OptionParseContext *octx, int group_idx, const char *arg)
static void	add_opt (OptionParseContext *octx, const OptionDef *opt, const char *key, const char *val)
static void	init_parse_context (OptionParseContext *octx, const OptionGroupDef *groups, int nb_groups)
void	uninit_parse_context (OptionParseContext *octx)
	Free all allocated memory in an OptionParseContext. More...
int	split_commandline (OptionParseContext *octx, int argc, char *argv[], const OptionDef *options, const OptionGroupDef *groups, int nb_groups)
	Split the commandline into an intermediate form convenient for further processing. More...
int	opt_cpuflags (void *optctx, const char *opt, const char *arg)
	Override the cpuflags. More...
int	opt_loglevel (void *optctx, const char *opt, const char *arg)
	Set the libav* libraries log level. More...
static void	expand_filename_template (AVBPrint *bp, const char *template, struct tm *tm)
int	opt_report (const char *opt)
int	opt_max_alloc (void *optctx, const char *opt, const char *arg)
int	opt_timelimit (void *optctx, const char *opt, const char *arg)
	Limit the execution time. More...
void	print_error (const char *filename, int err)
	Print an error message to stderr, indicating filename and a human readable description of the error code err. More...
static void	print_all_libs_info (int flags, int level)
static void	print_program_info (int flags, int level)
static void	print_buildconf (int flags, int level)
void	show_banner (int argc, char **argv, const OptionDef *options)
	Print the program banner to stderr. More...
int	show_version (void *optctx, const char *opt, const char *arg)
	Print the version of the program to stdout. More...
int	show_buildconf (void *optctx, const char *opt, const char *arg)
	Print the build configuration of the program to stdout. More...
int	show_license (void *optctx, const char *opt, const char *arg)
	Print the license of the program to stdout. More...
static int	is_device (const AVClass *avclass)
static int	show_formats_devices (void *optctx, const char *opt, const char *arg, int device_only)
int	show_formats (void *optctx, const char *opt, const char *arg)
	Print a listing containing all the formats supported by the program (including devices). More...
int	show_devices (void *optctx, const char *opt, const char *arg)
	Print a listing containing all the devices supported by the program. More...
static void	print_codec (const AVCodec *c)
static char	get_media_type_char (enum AVMediaType type)
static const AVCodec *	next_codec_for_id (enum AVCodecID id, const AVCodec *prev, int encoder)
static int	compare_codec_desc (const void *a, const void *b)
static unsigned	get_codecs_sorted (const AVCodecDescriptor ***rcodecs)
static void	print_codecs_for_id (enum AVCodecID id, int encoder)
int	show_codecs (void *optctx, const char *opt, const char *arg)
	Print a listing containing all the codecs supported by the program. More...
static void	print_codecs (int encoder)
int	show_decoders (void *optctx, const char *opt, const char *arg)
	Print a listing containing all the decoders supported by the program. More...
int	show_encoders (void *optctx, const char *opt, const char *arg)
	Print a listing containing all the encoders supported by the program. More...
int	show_bsfs (void *optctx, const char *opt, const char *arg)
	Print a listing containing all the bit stream filters supported by the program. More...
int	show_protocols (void *optctx, const char *opt, const char *arg)
	Print a listing containing all the protocols supported by the program. More...
int	show_filters (void *optctx, const char *opt, const char *arg)
	Print a listing containing all the filters supported by the program. More...
int	show_colors (void *optctx, const char *opt, const char *arg)
	Print a listing containing all the color names and values recognized by the program. More...
int	show_pix_fmts (void *optctx, const char *opt, const char *arg)
	Print a listing containing all the pixel formats supported by the program. More...
int	show_layouts (void *optctx, const char *opt, const char *arg)
	Print a listing containing all the standard channel layouts supported by the program. More...
int	show_sample_fmts (void *optctx, const char *opt, const char *arg)
	Print a listing containing all the sample formats supported by the program. More...
static void	show_help_codec (const char *name, int encoder)
static void	show_help_demuxer (const char *name)
static void	show_help_muxer (const char *name)
int	show_help (void *optctx, const char *opt, const char *arg)
	Generic -h handler common to all fftools. More...
int	read_yesno (void)
	Return a positive value if a line read from standard input starts with [yY], otherwise return 0. More...
FILE *	get_preset_file (char *filename, size_t filename_size, const char *preset_name, int is_path, const char *codec_name)
	Get a file corresponding to a preset file. More...
int	check_stream_specifier (AVFormatContext *s, AVStream *st, const char *spec)
	Check if the given stream matches a stream specifier. More...
AVDictionary *	filter_codec_opts (AVDictionary *opts, enum AVCodecID codec_id, AVFormatContext *s, AVStream *st, AVCodec *codec)
	Filter out options for given codec. More...
AVDictionary **	setup_find_stream_info_opts (AVFormatContext *s, AVDictionary *codec_opts)
	Setup AVCodecContext options for avformat_find_stream_info(). More...
void *	grow_array (void *array, int elem_size, int *size, int new_size)
	Realloc array to hold new_size elements of elem_size. More...
double	get_rotation (AVStream *st)

Variables
AVDictionary *	sws_dict
AVDictionary *	swr_opts
AVDictionary *	format_opts
AVDictionary *	codec_opts
AVDictionary *	resample_opts
static FILE *	report_file
static int	report_file_level = AV_LOG_DEBUG
int	hide_banner = 0
static void(*	program_exit )(int ret)
static int	warned_cfg = 0

Macro Definition Documentation

#define FLAGS   (o->type == AV_OPT_TYPE_FLAGS && (arg[0]=='-' || arg[0]=='+')) ? AV_DICT_APPEND : 0

Definition at line 525 of file cmdutils.c.

Referenced by opt_default().

#define GET_ARG

(

arg

)

Value:

do {                                                                           \
    arg = argv[optindex++];                                                    \
    if (!arg) {                                                                \
        av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'.\n", opt);\
        return AVERROR(EINVAL);                                                \
    }                                                                          \
} while (0)

Referenced by split_commandline().

#define INDENT   1

Definition at line 1036 of file cmdutils.c.

Referenced by print_buildconf(), print_program_info(), show_banner(), and show_buildconf().

#define SHOW_VERSION   2

Definition at line 1037 of file cmdutils.c.

Referenced by show_banner(), and show_version().

#define SHOW_CONFIG   4

Definition at line 1038 of file cmdutils.c.

Referenced by show_banner().

#define SHOW_COPYRIGHT   8

Definition at line 1039 of file cmdutils.c.

Referenced by print_program_info(), show_banner(), and show_version().

#define PRINT_LIB_INFO	(		libname,
			LIBNAME,
			flags,
			level
	)

Value:

if (CONFIG_##LIBNAME) {                                             \
        const char *indent = flags & INDENT? "  " : "";                 \
        if (flags & SHOW_VERSION) {                                     \
            unsigned int version = libname##_version();                 \
            av_log(NULL, level,                                         \
                   "%slib%-11s %2d.%3d.%3d / %2d.%3d.%3d\n",            \
                   indent, #libname,                                    \
                   LIB##LIBNAME##_VERSION_MAJOR,                        \
                   LIB##LIBNAME##_VERSION_MINOR,                        \
                   LIB##LIBNAME##_VERSION_MICRO,                        \
                   version >> 16, version >> 8 & 0xff, version & 0xff); \
        }                                                               \
        if (flags & SHOW_CONFIG) {                                      \
            const char *cfg = libname##_configuration();                \
            if (strcmp(FFMPEG_CONFIGURATION, cfg)) {                    \
                if (!warned_cfg) {                                      \
                    av_log(NULL, level,                                 \
                            "%sWARNING: library configuration mismatch\n", \
                            indent);                                    \
                    warned_cfg = 1;                                     \
                }                                                       \
                av_log(NULL, level, "%s%-11s configuration: %s\n",      \
                        indent, #libname, cfg);                         \
            }                                                           \
        }                                                               \
    }                                                                   \

Definition at line 1041 of file cmdutils.c.

Referenced by print_all_libs_info().

#define PRINT_CODEC_SUPPORTED	(		codec,
			field,
			type,
			list_name,
			term,
			get_name
	)

Value:

if (codec->field) {                                                      \
        const type *p = codec->field;                                        \
                                                                             \
        printf("    Supported " list_name ":");                              \
        while (*p != term) {                                                 \
            get_name(*p);                                                    \
            printf(" %s", name);                                             \
            p++;                                                             \
        }                                                                    \
        printf("\n");                                                        \
    }                                                                        \

Definition at line 1296 of file cmdutils.c.

Referenced by print_codec().

#define sws_isSupportedInput

(

x

)

0

Referenced by query_formats(), selfTest(), and show_pix_fmts().

#define sws_isSupportedOutput

(

x

)

0

Referenced by query_formats(), selfTest(), and show_pix_fmts().

Function Documentation

static int init_report ( const char *  env )

static

Definition at line 921 of file cmdutils.c.

Referenced by opt_report(), and parse_loglevel().

void init_opts

(

void

)

Initialize the cmdutils option system, in particular allocate the *_opts contexts.

Definition at line 74 of file cmdutils.c.

Referenced by finish_group(), init_parse_context(), and main().

void uninit_opts

(

void

)

Uninitialize the cmdutils option system, in particular free the *_opts contexts and their contents.

Definition at line 79 of file cmdutils.c.

Referenced by do_exit(), ffmpeg_cleanup(), main(), and uninit_parse_context().

void log_callback_help	(	void *	ptr,
		int	level,
		const char *	fmt,
		va_list	vl
	)

Trivial log callback.

Only suitable for opt_help and similar since it lacks prefix handling.

Definition at line 88 of file cmdutils.c.

Referenced by show_buildconf(), show_help(), show_help_default(), and show_version().

static void log_callback_report ( void *  ptr, int  level, const char *  fmt, va_list  vl  )

static

Definition at line 93 of file cmdutils.c.

Referenced by init_report().

void register_exit

(

void(*)(int ret)

cb

)

Register a program-specific cleanup routine.

Definition at line 111 of file cmdutils.c.

Referenced by main().

void exit_program

(

int

ret

)

Wraps exit with a program-specific cleanup routine.

Definition at line 116 of file cmdutils.c.

Referenced by abort_codec_experimental(), add_input_streams(), assert_avoptions(), assert_file_overwrite(), check_streamcopy_filters(), choose_pix_fmts(), configure_output_filter(), copy_metadata(), decode_audio(), decode_video(), DEF_CHOOSE_FORMAT(), do_audio_out(), do_subtitle_out(), do_video_out(), do_video_stats(), dump_attachment(), filter_codec_opts(), find_codec_or_die(), flush_encoders(), get_codecs_sorted(), get_line(), get_ost_filters(), grow_array(), init_complex_filtergraph(), init_input_filter(), init_output_filter(), init_output_stream(), init_parse_context(), init_report(), main(), new_audio_stream(), new_data_stream(), new_output_stream(), new_subtitle_stream(), new_unknown_stream(), new_video_stream(), open_input_file(), open_output_file(), opt_input_file(), opt_loglevel(), opt_map(), opt_map_channel(), opt_max_alloc(), opt_preset(), opt_streamid(), opt_target(), opt_vstats(), parse_forced_key_frames(), parse_matrix_coeffs(), parse_meta_type(), parse_number_or_die(), parse_options(), parse_time_or_die(), print_sdp(), process_input(), process_input_packet(), set_encoder_id(), transcode_init(), transcode_subtitles(), write_frame(), and write_option().

double parse_number_or_die	(	const char *	context,
		const char *	numstr,
		int	type,
		double	min,
		double	max
	)

Parse a string and return its corresponding value as a double.

Exit from the application if the string cannot be correctly parsed or the corresponding value is invalid.

Parameters

context	the context of the value to be set (e.g. the corresponding command line option name)
numstr	the string to be parsed
type	the type (OPT_INT64 or OPT_FLOAT) as which the string should be parsed
min	the minimum valid accepted value
max	the maximum valid accepted value

Definition at line 124 of file cmdutils.c.

Referenced by opt_height(), opt_show_mode(), opt_streamid(), opt_timelimit(), opt_vsync(), opt_width(), and write_option().

int64_t parse_time_or_die	(	const char *	context,
		const char *	timestr,
		int	is_duration
	)

Parse a string specifying a time and return its corresponding value as a number of microseconds.

Exit from the application if the string cannot be correctly parsed.

Parameters

context	the context of the value to be set (e.g. the corresponding command line option name)
timestr	the string to be parsed
is_duration	a flag which tells how to interpret timestr, if not zero timestr is interpreted as a duration, otherwise as a date

See Also

av_parse_time()

Definition at line 145 of file cmdutils.c.

Referenced by opt_duration(), opt_recording_timestamp(), opt_seek(), parse_forced_key_frames(), and write_option().

void show_help_options	(	const OptionDef *	options,
		const char *	msg,
		int	req_flags,
		int	rej_flags,
		int	alt_flags
	)

Print help for all options matching specified flags.

Parameters

options	a list of options
msg	title of this group. Only printed if at least one option matches.
req_flags	print only options which have all those flags set.
rej_flags	don't print options which have any of those flags set.
alt_flags	print only options that have at least one of those flags set

Definition at line 157 of file cmdutils.c.

Referenced by show_help_default().

void show_help_children	(	const AVClass *	class,
		int	flags
	)

Show help for all options with given flags in class and all its children.

Definition at line 186 of file cmdutils.c.

Referenced by print_codec(), show_help_children(), show_help_default(), show_help_demuxer(), and show_help_muxer().

static const OptionDef* find_option ( const OptionDef *  po, const char *  name  )

static

Definition at line 198 of file cmdutils.c.

Referenced by locate_option(), parse_option(), and split_commandline().

static void prepare_app_arguments ( int *  argc_ptr, char ***  argv_ptr  )

inlinestatic

Definition at line 270 of file cmdutils.c.

Referenced by parse_options(), and split_commandline().

static int write_option ( void *  optctx, const OptionDef *  po, const char *  opt, const char *  arg  )

static

Definition at line 276 of file cmdutils.c.

Referenced by parse_optgroup(), and parse_option().

int parse_option	(	void *	optctx,
		const char *	opt,
		const char *	arg,
		const OptionDef *	options
	)

Parse one given option.

Returns

on success 1 if arg was consumed, 0 otherwise; negative number on error

Definition at line 331 of file cmdutils.c.

Referenced by open_output_file(), opt_audio_codec(), opt_audio_filters(), opt_audio_frames(), opt_audio_qscale(), opt_channel_layout(), opt_data_codec(), opt_data_frames(), opt_old2new(), opt_qscale(), opt_recording_timestamp(), opt_subtitle_codec(), opt_target(), opt_timecode(), opt_video_codec(), opt_video_filters(), opt_video_frames(), and parse_options().

void parse_options	(	void *	optctx,
		int	argc,
		char **	argv,
		const OptionDef *	options,
		void(*)(void *, const char *)	parse_arg_function
	)

Definition at line 364 of file cmdutils.c.

Referenced by main().

int parse_optgroup	(	void *	optctx,
		OptionGroup *	g
	)

Parse an options group and write results into optctx.

Parameters

optctx

an app-specific options context. NULL for global options group

Definition at line 395 of file cmdutils.c.

Referenced by ffmpeg_parse_options(), and open_files().

int locate_option	(	int	argc,
		char **	argv,
		const OptionDef *	options,
		const char *	optname
	)

Return index of option opt in argv or 0 if not found.

Definition at line 428 of file cmdutils.c.

Referenced by parse_loglevel(), and show_banner().

static void dump_argument ( const char *  a )

static

Definition at line 454 of file cmdutils.c.

Referenced by parse_loglevel().

static void check_options ( const OptionDef *  po )

static

Definition at line 478 of file cmdutils.c.

Referenced by parse_loglevel().

void parse_loglevel	(	int	argc,
		char **	argv,
		const OptionDef *	options
	)

Find the '-loglevel' option in the command line args and apply it.

Definition at line 487 of file cmdutils.c.

Referenced by main().

static const AVOption* opt_find ( void *  obj, const char *  name, const char *  unit, int  opt_flags, int  search_flags  )

static

Definition at line 516 of file cmdutils.c.

Referenced by opt_default().

int opt_default	(	void *	optctx,
		const char *	opt,
		const char *	arg
	)

Fallback for options that are not explicitly handled, these will be parsed through AVOptions.

Definition at line 526 of file cmdutils.c.

Referenced by opt_default_new(), opt_frame_pix_fmt(), opt_frame_size(), opt_target(), opt_video_channel(), opt_video_standard(), and split_commandline().

static int match_group_separator ( const OptionGroupDef *  groups, int  nb_groups, const char *  opt  )

static

Definition at line 614 of file cmdutils.c.

Referenced by split_commandline().

static void finish_group ( OptionParseContext *  octx, int  group_idx, const char *  arg  )

static

Definition at line 634 of file cmdutils.c.

Referenced by split_commandline().

static void add_opt ( OptionParseContext *  octx, const OptionDef *  opt, const char *  key, const char *  val  )

static

Definition at line 665 of file cmdutils.c.

Referenced by split_commandline().

static void init_parse_context ( OptionParseContext *  octx, const OptionGroupDef *  groups, int  nb_groups  )

static

Definition at line 677 of file cmdutils.c.

Referenced by split_commandline().

void uninit_parse_context

(

OptionParseContext *

octx

)

Free all allocated memory in an OptionParseContext.

Definition at line 699 of file cmdutils.c.

Referenced by ffmpeg_parse_options().

int split_commandline	(	OptionParseContext *	octx,
		int	argc,
		char *	argv[],
		const OptionDef *	options,
		const OptionGroupDef *	groups,
		int	nb_groups
	)

Split the commandline into an intermediate form convenient for further processing.

The commandline is assumed to be composed of options which either belong to a group (those with OPT_SPEC, OPT_OFFSET or OPT_PERFILE) or are global (everything else).

A group (defined by an OptionGroupDef struct) is a sequence of options terminated by either a group separator option (e.g. -i) or a parameter that is not an option (doesn't start with -). A group without a separator option must always be first in the supplied groups list.

All options within the same group are stored in one OptionGroup struct in an OptionGroupList, all groups with the same group definition are stored in one OptionGroupList in OptionParseContext.groups. The order of group lists is the same as the order of group definitions.

Definition at line 725 of file cmdutils.c.

Referenced by ffmpeg_parse_options().

int opt_cpuflags	(	void *	optctx,
		const char *	opt,
		const char *	arg
	)

Override the cpuflags.

Definition at line 831 of file cmdutils.c.

int opt_loglevel	(	void *	optctx,
		const char *	opt,
		const char *	arg
	)

Set the libav* libraries log level.

Definition at line 843 of file cmdutils.c.

Referenced by parse_loglevel().

static void expand_filename_template ( AVBPrint *  bp, const char *  template, struct tm *  tm  )

static

Definition at line 893 of file cmdutils.c.

Referenced by init_report().

int opt_report

(

const char *

opt

)

Definition at line 992 of file cmdutils.c.

int opt_max_alloc	(	void *	optctx,
		const char *	opt,
		const char *	arg
	)

Definition at line 997 of file cmdutils.c.

int opt_timelimit	(	void *	optctx,
		const char *	opt,
		const char *	arg
	)

Limit the execution time.

Definition at line 1011 of file cmdutils.c.

void print_error	(	const char *	filename,
		int	err
	)

Print an error message to stderr, indicating filename and a human readable description of the error code err.

If strerror_r() is not available the use of this function in a multithreaded application may be unsafe.

See Also

av_strerror()

Definition at line 1024 of file cmdutils.c.

Referenced by open_input_file(), open_output_file(), process_input(), read_thread(), and write_frame().

static void print_all_libs_info ( int  flags, int  level  )

static

Definition at line 1069 of file cmdutils.c.

Referenced by show_banner(), and show_version().

static void print_program_info ( int  flags, int  level  )

static

Definition at line 1082 of file cmdutils.c.

Referenced by show_banner(), and show_version().

static void print_buildconf ( int  flags, int  level  )

static

Definition at line 1096 of file cmdutils.c.

Referenced by show_buildconf().

void show_banner	(	int	argc,
		char **	argv,
		const OptionDef *	options
	)

Print the program banner to stderr.

The banner contents depend on the current version of the repository and of the libav* libraries used by the program.

Definition at line 1122 of file cmdutils.c.

Referenced by main().

int show_version	(	void *	optctx,
		const char *	opt,
		const char *	arg
	)

Print the version of the program to stdout.

The version message depends on the current versions of the repository and of the libav* libraries. This option processing function does not utilize the arguments.

Definition at line 1133 of file cmdutils.c.

int show_buildconf	(	void *	optctx,
		const char *	opt,
		const char *	arg
	)

Print the build configuration of the program to stdout.

The contents depend on the definition of FFMPEG_CONFIGURATION. This option processing function does not utilize the arguments.

Definition at line 1142 of file cmdutils.c.

int show_license	(	void *	optctx,
		const char *	opt,
		const char *	arg
	)

Print the license of the program to stdout.

The license depends on the license of the libraries compiled into the program. This option processing function does not utilize the arguments.

Definition at line 1150 of file cmdutils.c.

static int is_device ( const AVClass *  avclass )

static

Definition at line 1224 of file cmdutils.c.

Referenced by show_formats_devices().

static int show_formats_devices ( void *  optctx, const char *  opt, const char *  arg, int  device_only  )

static

Definition at line 1231 of file cmdutils.c.

Referenced by show_devices(), and show_formats().

int show_formats	(	void *	optctx,
		const char *	opt,
		const char *	arg
	)

Print a listing containing all the formats supported by the program (including devices).

This option processing function does not utilize the arguments.

Definition at line 1286 of file cmdutils.c.

int show_devices	(	void *	optctx,
		const char *	opt,
		const char *	arg
	)

Print a listing containing all the devices supported by the program.

This option processing function does not utilize the arguments.

Definition at line 1291 of file cmdutils.c.

static void print_codec ( const AVCodec *  c )

static

Definition at line 1309 of file cmdutils.c.

Referenced by show_help_codec().

static char get_media_type_char ( enum AVMediaType  type )

static

Definition at line 1356 of file cmdutils.c.

Referenced by print_codecs(), show_codecs(), and show_filters().

static const AVCodec* next_codec_for_id ( enum AVCodecID  id, const AVCodec *  prev, int  encoder  )

static

Definition at line 1368 of file cmdutils.c.

Referenced by print_codecs(), print_codecs_for_id(), show_codecs(), and show_help_codec().

static int compare_codec_desc ( const void *  a, const void *  b  )

static

Definition at line 1379 of file cmdutils.c.

Referenced by get_codecs_sorted().

static unsigned get_codecs_sorted ( const AVCodecDescriptor ***  rcodecs )

static

Definition at line 1388 of file cmdutils.c.

Referenced by print_codecs(), and show_codecs().

static void print_codecs_for_id ( enum AVCodecID  id, int  encoder  )

static

Definition at line 1409 of file cmdutils.c.

Referenced by show_codecs().

int show_codecs	(	void *	optctx,
		const char *	opt,
		const char *	arg
	)

Print a listing containing all the codecs supported by the program.

This option processing function does not utilize the arguments.

Definition at line 1421 of file cmdutils.c.

static void print_codecs ( int  encoder )

static

Definition at line 1476 of file cmdutils.c.

Referenced by show_decoders(), and show_encoders().

int show_decoders	(	void *	optctx,
		const char *	opt,
		const char *	arg
	)

Print a listing containing all the decoders supported by the program.

Definition at line 1514 of file cmdutils.c.

int show_encoders	(	void *	optctx,
		const char *	opt,
		const char *	arg
	)

Print a listing containing all the encoders supported by the program.

Definition at line 1520 of file cmdutils.c.

int show_bsfs	(	void *	optctx,
		const char *	opt,
		const char *	arg
	)

Print a listing containing all the bit stream filters supported by the program.

This option processing function does not utilize the arguments.

Definition at line 1526 of file cmdutils.c.

int show_protocols	(	void *	optctx,
		const char *	opt,
		const char *	arg
	)

Print a listing containing all the protocols supported by the program.

This option processing function does not utilize the arguments.

Definition at line 1537 of file cmdutils.c.

int show_filters	(	void *	optctx,
		const char *	opt,
		const char *	arg
	)

Print a listing containing all the filters supported by the program.

This option processing function does not utilize the arguments.

Definition at line 1552 of file cmdutils.c.

int show_colors	(	void *	optctx,
		const char *	opt,
		const char *	arg
	)

Print a listing containing all the color names and values recognized by the program.

Definition at line 1598 of file cmdutils.c.

int show_pix_fmts	(	void *	optctx,
		const char *	opt,
		const char *	arg
	)

Print a listing containing all the pixel formats supported by the program.

This option processing function does not utilize the arguments.

Definition at line 1612 of file cmdutils.c.

int show_layouts	(	void *	optctx,
		const char *	opt,
		const char *	arg
	)

Print a listing containing all the standard channel layouts supported by the program.

This option processing function does not utilize the arguments.

Definition at line 1645 of file cmdutils.c.

int show_sample_fmts	(	void *	optctx,
		const char *	opt,
		const char *	arg
	)

Print a listing containing all the sample formats supported by the program.

Definition at line 1674 of file cmdutils.c.

static void show_help_codec ( const char *  name, int  encoder  )

static

Definition at line 1683 of file cmdutils.c.

Referenced by show_help().

static void show_help_demuxer ( const char *  name )

static

Definition at line 1718 of file cmdutils.c.

Referenced by show_help().

static void show_help_muxer ( const char *  name )

static

Definition at line 1736 of file cmdutils.c.

Referenced by show_help().

int show_help	(	void *	optctx,
		const char *	opt,
		const char *	arg
	)

Generic -h handler common to all fftools.

Definition at line 1825 of file cmdutils.c.

int read_yesno

(

void

)

Return a positive value if a line read from standard input starts with [yY], otherwise return 0.

Definition at line 1859 of file cmdutils.c.

Referenced by assert_file_overwrite().

FILE* get_preset_file	(	char *	filename,
		size_t	filename_size,
		const char *	preset_name,
		int	is_path,
		const char *	codec_name
	)

Get a file corresponding to a preset file.

If is_path is non-zero, look for the file in the path preset_name. Otherwise search for a file named arg.ffpreset in the directories $FFMPEG_DATADIR (if set), $HOME/.ffmpeg, and in the datadir defined at configuration time or in a "ffpresets" folder along the executable on win32, in that order. If no such file is found and codec_name is defined, then search for a file named codec_name-preset_name.avpreset in the above-mentioned directories.

Parameters

filename	buffer where the name of the found filename is written
filename_size	size in bytes of the filename buffer
preset_name	name of the preset to search
is_path	tell if preset_name is a filename path
codec_name	name of the codec for which to look for the preset, may be NULL

Definition at line 1870 of file cmdutils.c.

Referenced by ffserver_opt_preset(), and opt_preset().

int check_stream_specifier	(	AVFormatContext *	s,
		AVStream *	st,
		const char *	spec
	)

Check if the given stream matches a stream specifier.

Parameters

s	Corresponding format context.
st	Stream from s to be checked.
spec	A stream specifier of the [v|a|s|d]:[<stream index>] form.

Returns

1 if the stream matches, 0 if it doesn't, <0 on error

Definition at line 1920 of file cmdutils.c.

Referenced by copy_metadata(), filter_codec_opts(), init_input_filter(), open_input_file(), open_output_file(), and opt_map().

AVDictionary* filter_codec_opts	(	AVDictionary *	opts,
		enum AVCodecID	codec_id,
		AVFormatContext *	s,
		AVStream *	st,
		AVCodec *	codec
	)

Filter out options for given codec.

Create a new options dictionary containing only the options from opts which apply to the codec with ID codec_id.

Parameters

opts	dictionary to place options in
codec_id	ID of the codec that should be filtered for
s	Corresponding format context.
st	A stream from s for which the options should be filtered.
codec	The particular codec for which the options should be filtered. If null, the default one is looked up according to the codec id.

Returns

a pointer to the created dictionary

Definition at line 1928 of file cmdutils.c.

Referenced by add_input_streams(), new_output_stream(), open_input_file(), setup_find_stream_info_opts(), and stream_component_open().

AVDictionary** setup_find_stream_info_opts	(	AVFormatContext *	s,
		AVDictionary *	codec_opts
	)

Setup AVCodecContext options for avformat_find_stream_info().

Create an array of dictionaries, one dictionary for each stream contained in s. Each dictionary will contain the options from codec_opts which can be applied to the corresponding stream codec context.

Returns

pointer to the created array of dictionaries, NULL if it cannot be created

Definition at line 1985 of file cmdutils.c.

Referenced by open_input_file(), and read_thread().

void* grow_array	(	void *	array,
		int	elem_size,
		int *	size,
		int	new_size
	)

Realloc array to hold new_size elements of elem_size.

Calls exit() on failure.

Parameters

array	array to reallocate
elem_size	size in bytes of each element
size	new element count will be written here
new_size	number of elements to place in reallocated array

Returns

reallocated array

Definition at line 2005 of file cmdutils.c.

Referenced by opt_streamid(), and write_option().

double get_rotation

(

AVStream *

st

)

Definition at line 2024 of file cmdutils.c.

Referenced by configure_input_video_filter().

Variable Documentation

AVDictionary* sws_dict

Definition at line 66 of file cmdutils.c.

Referenced by finish_group(), and queue_picture().

AVDictionary* swr_opts

Definition at line 67 of file cmdutils.c.

Referenced by finish_group().

AVDictionary* format_opts

Definition at line 68 of file cmdutils.c.

Referenced by finish_group(), main(), open_input_file(), opt_default_new(), opt_target(), and read_thread().

AVDictionary * codec_opts

Definition at line 68 of file cmdutils.c.

Referenced by finish_group(), open_input_file(), opt_default_new(), opt_target(), read_thread(), and stream_component_open().

AVDictionary * resample_opts

Definition at line 68 of file cmdutils.c.

Referenced by finish_group().

FILE* report_file

static

Definition at line 70 of file cmdutils.c.

Referenced by dump_argument(), init_report(), log_callback_report(), and parse_loglevel().

int report_file_level = AV_LOG_DEBUG

static

Definition at line 71 of file cmdutils.c.

Referenced by init_report(), and log_callback_report().

int hide_banner = 0

Definition at line 72 of file cmdutils.c.

Referenced by parse_loglevel(), and show_banner().

void(* program_exit)(int ret)

static

Definition at line 109 of file cmdutils.c.

Referenced by exit_program(), and register_exit().

int warned_cfg = 0

static

Definition at line 1034 of file cmdutils.c.