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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/mathematics.h"
#include "libavutil/imgutils.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) ? 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.
 
void uninit_opts (void)
 Uninitialize the cmdutils option system, in particular free the *_opts contexts and their contents.
 
void log_callback_help (void *ptr, int level, const char *fmt, va_list vl)
 Trivial log callback.
 
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.
 
void exit_program (int ret)
 Wraps exit with a program-specific cleanup routine.
 
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.
 
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.
 
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.
 
void show_help_children (const AVClass *class, int flags)
 Show help for all options with given flags in class and all its children.
 
static const OptionDeffind_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.
 
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.
 
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.
 
static void dump_argument (const char *a)
 
void parse_loglevel (int argc, char **argv, const OptionDef *options)
 Find the '-loglevel' option in the command line args and apply it.
 
static const AVOptionopt_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.
 
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.
 
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.
 
int opt_cpuflags (void *optctx, const char *opt, const char *arg)
 Override the cpuflags.
 
int opt_loglevel (void *optctx, const char *opt, const char *arg)
 Set the libav* libraries log level.
 
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.
 
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.
 
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.
 
int show_version (void *optctx, const char *opt, const char *arg)
 Print the version of the program to stdout.
 
int show_buildconf (void *optctx, const char *opt, const char *arg)
 Print the build configuration of the program to stdout.
 
int show_license (void *optctx, const char *opt, const char *arg)
 Print the license of the program to stdout.
 
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).
 
int show_devices (void *optctx, const char *opt, const char *arg)
 Print a listing containing all the devices supported by the program.
 
static void print_codec (const AVCodec *c)
 
static char get_media_type_char (enum AVMediaType type)
 
static const AVCodecnext_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.
 
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.
 
int show_encoders (void *optctx, const char *opt, const char *arg)
 Print a listing containing all the encoders supported by the program.
 
int show_bsfs (void *optctx, const char *opt, const char *arg)
 Print a listing containing all the bit stream filters supported by the program.
 
int show_protocols (void *optctx, const char *opt, const char *arg)
 Print a listing containing all the protocols supported by the program.
 
int show_filters (void *optctx, const char *opt, const char *arg)
 Print a listing containing all the filters supported by the program.
 
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.
 
int show_pix_fmts (void *optctx, const char *opt, const char *arg)
 Print a listing containing all the pixel formats supported by the program.
 
int show_layouts (void *optctx, const char *opt, const char *arg)
 Print a listing containing all the standard channel layouts supported by the program.
 
int show_sample_fmts (void *optctx, const char *opt, const char *arg)
 Print a listing containing all the sample formats supported by the program.
 
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.
 
int read_yesno (void)
 Return a positive value if a line read from standard input starts with [yY], otherwise return 0.
 
int cmdutils_read_file (const char *filename, char **bufptr, size_t *size)
 Read the file with name filename, and put its content in a newly allocated 0-terminated buffer.
 
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.
 
int check_stream_specifier (AVFormatContext *s, AVStream *st, const char *spec)
 Check if the given stream matches a stream specifier.
 
AVDictionaryfilter_codec_opts (AVDictionary *opts, enum AVCodecID codec_id, AVFormatContext *s, AVStream *st, AVCodec *codec)
 Filter out options for given codec.
 
AVDictionary ** setup_find_stream_info_opts (AVFormatContext *s, AVDictionary *codec_opts)
 Setup AVCodecContext options for avformat_find_stream_info().
 
voidgrow_array (void *array, int elem_size, int *size, int new_size)
 Realloc array to hold new_size elements of elem_size.
 

Variables

struct SwsContextsws_opts
 
AVDictionaryswr_opts
 
AVDictionaryformat_opts
 
AVDictionarycodec_opts
 
AVDictionaryresample_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) ? AV_DICT_APPEND : 0

Definition at line 518 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 1029 of file cmdutils.c.

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

#define SHOW_VERSION   2

Definition at line 1030 of file cmdutils.c.

Referenced by show_banner(), and show_version().

#define SHOW_CONFIG   4

Definition at line 1031 of file cmdutils.c.

Referenced by show_banner().

#define SHOW_COPYRIGHT   8

Definition at line 1032 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 1034 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 1290 of file cmdutils.c.

Referenced by print_codec().

#define sws_isSupportedInput (   x)    0
#define sws_isSupportedOutput (   x)    0

Function Documentation

static int init_report ( const char *  env)
static

Definition at line 914 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 72 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 80 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 93 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 98 of file cmdutils.c.

Referenced by init_report().

void register_exit ( void(*)(int ret cb)

Register a program-specific cleanup routine.

Definition at line 116 of file cmdutils.c.

Referenced by main().

void exit_program ( int  ret)
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
contextthe context of the value to be set (e.g. the corresponding command line option name)
numstrthe string to be parsed
typethe type (OPT_INT64 or OPT_FLOAT) as which the string should be parsed
minthe minimum valid accepted value
maxthe maximum valid accepted value

Definition at line 129 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
contextthe context of the value to be set (e.g. the corresponding command line option name)
timestrthe string to be parsed
is_durationa 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 150 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
optionsa list of options
msgtitle of this group. Only printed if at least one option matches.
req_flagsprint only options which have all those flags set.
rej_flagsdon't print options which have any of those flags set.
alt_flagsprint only options that have at least one of those flags set

Definition at line 162 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 191 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 203 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 275 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 281 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 
)
void parse_options ( void optctx,
int  argc,
char **  argv,
const OptionDef options,
void(*)(void *, const char *)  parse_arg_function 
)

Definition at line 369 of file cmdutils.c.

Referenced by main(), and parse_script().

int parse_optgroup ( void optctx,
OptionGroup g 
)

Parse an options group and write results into optctx.

Parameters
optctxan app-specific options context. NULL for global options group

Definition at line 400 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 433 of file cmdutils.c.

Referenced by parse_loglevel(), and show_banner().

static void dump_argument ( const char *  a)
static

Definition at line 459 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 483 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 509 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 519 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 603 of file cmdutils.c.

Referenced by split_commandline().

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

Definition at line 623 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 658 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 670 of file cmdutils.c.

Referenced by split_commandline().

void uninit_parse_context ( OptionParseContext octx)

Free all allocated memory in an OptionParseContext.

Definition at line 692 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 719 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 825 of file cmdutils.c.

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

Set the libav* libraries log level.

Definition at line 837 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 886 of file cmdutils.c.

Referenced by init_report().

int opt_report ( const char *  opt)

Definition at line 985 of file cmdutils.c.

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

Definition at line 990 of file cmdutils.c.

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

Limit the execution time.

Definition at line 1004 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 1017 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 1062 of file cmdutils.c.

Referenced by show_banner(), and show_version().

static void print_program_info ( int  flags,
int  level 
)
static

Definition at line 1075 of file cmdutils.c.

Referenced by show_banner(), and show_version().

static void print_buildconf ( int  flags,
int  level 
)
static

Definition at line 1090 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 1116 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 1127 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 1136 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 1144 of file cmdutils.c.

static int is_device ( const AVClass avclass)
static

Definition at line 1218 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 1225 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 1280 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 1285 of file cmdutils.c.

static void print_codec ( const AVCodec c)
static

Definition at line 1303 of file cmdutils.c.

Referenced by show_help_codec().

static char get_media_type_char ( enum AVMediaType  type)
static

Definition at line 1350 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 1362 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 1373 of file cmdutils.c.

Referenced by get_codecs_sorted().

static unsigned get_codecs_sorted ( const AVCodecDescriptor ***  rcodecs)
static

Definition at line 1382 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 1403 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 1415 of file cmdutils.c.

static void print_codecs ( int  encoder)
static

Definition at line 1470 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 1508 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 1514 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 1520 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 1531 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 1546 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 1592 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 1606 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 1639 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 1668 of file cmdutils.c.

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

Definition at line 1677 of file cmdutils.c.

Referenced by show_help().

static void show_help_demuxer ( const char *  name)
static

Definition at line 1712 of file cmdutils.c.

Referenced by show_help().

static void show_help_muxer ( const char *  name)
static

Definition at line 1730 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 1819 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 1853 of file cmdutils.c.

Referenced by assert_file_overwrite().

int cmdutils_read_file ( const char *  filename,
char **  bufptr,
size_t *  size 
)

Read the file with name filename, and put its content in a newly allocated 0-terminated buffer.

Parameters
filenamefile to read from
bufptrlocation where pointer to buffer is returned
sizelocation where size of buffer is returned
Returns
>= 0 in case of success, a negative value corresponding to an AVERROR error code in case of failure.

Definition at line 1864 of file cmdutils.c.

Referenced by transcode_init().

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
filenamebuffer where the name of the found filename is written
filename_sizesize in bytes of the filename buffer
preset_namename of the preset to search
is_pathtell if preset_name is a filename path
codec_namename of the codec for which to look for the preset, may be NULL

Definition at line 1921 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
sCorresponding format context.
stStream from s to be checked.
specA 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 1971 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
optsdictionary to place options in
codec_idID of the codec that should be filtered for
sCorresponding format context.
stA stream from s for which the options should be filtered.
codecThe 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 1979 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 2036 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
arrayarray to reallocate
elem_sizesize in bytes of each element
sizenew element count will be written here
new_sizenumber of elements to place in reallocated array
Returns
reallocated array

Definition at line 2056 of file cmdutils.c.

Referenced by opt_streamid(), and write_option().

Variable Documentation

struct SwsContext* sws_opts

Definition at line 64 of file cmdutils.c.

Referenced by finish_group(), and queue_picture().

AVDictionary* swr_opts

Definition at line 65 of file cmdutils.c.

Referenced by finish_group().

AVDictionary* format_opts

Definition at line 66 of file cmdutils.c.

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

AVDictionary * codec_opts
AVDictionary * resample_opts

Definition at line 66 of file cmdutils.c.

Referenced by finish_group().

FILE* report_file
static

Definition at line 68 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 69 of file cmdutils.c.

Referenced by init_report(), and log_callback_report().

int hide_banner = 0

Definition at line 70 of file cmdutils.c.

Referenced by parse_loglevel(), and show_banner().

void(* program_exit)(int ret)
static

Definition at line 114 of file cmdutils.c.

Referenced by exit_program(), and register_exit().

int warned_cfg = 0
static

Definition at line 1027 of file cmdutils.c.