cmdutils.c File Reference

#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <math.h>
#include "config.h"
#include "libavformat/avformat.h"
#include "libavfilter/avfilter.h"
#include "libavdevice/avdevice.h"
#include "libswscale/swscale.h"
#include "libswresample/swresample.h"
#include "libavutil/avstring.h"
#include "libavutil/mathematics.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/eval.h"
#include "libavutil/dict.h"
#include "libavutil/opt.h"
#include "cmdutils.h"
#include "version.h"

Go to the source code of this file.

Defines

#define FLAGS(o)   ((o)->type == AV_OPT_TYPE_FLAGS) ? AV_DICT_APPEND : 0
#define INDENT   1
#define SHOW_VERSION   2
#define SHOW_CONFIG   4
#define SHOW_COPYRIGHT   8
#define PRINT_LIB_INFO(libname, LIBNAME, flags, level)
#define sws_isSupportedInput(x)   0
#define sws_isSupportedOutput(x)   0

Functions

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)
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 mask, int value)
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)
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 *))
static int locate_option (int argc, char **argv, const OptionDef *options, const char *optname)
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.
int opt_default (const char *opt, const char *arg)
 Fallback for options that are not explicitly handled, these will be parsed through AVOptions.
int opt_loglevel (const char *opt, const char *arg)
 Set the libav* libraries log level.
int opt_report (const char *opt)
int opt_max_alloc (const char *opt, const char *arg)
int opt_codec_debug (const char *opt, const char *arg)
int opt_timelimit (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)
void show_banner (int argc, char **argv, const OptionDef *options)
 Print the program banner to stderr.
int opt_version (const char *opt, const char *arg)
 Print the version of the program to stdout.
int opt_license (const char *opt, const char *arg)
 Print the license of the program to stdout.
int opt_formats (const char *opt, const char *arg)
 Print a listing containing all the formats supported by the program.
static char get_media_type_char (enum AVMediaType type)
int opt_codecs (const char *opt, const char *arg)
 Print a listing containing all the codecs supported by the program.
int opt_bsfs (const char *opt, const char *arg)
 Print a listing containing all the bit stream filters supported by the program.
int opt_protocols (const char *opt, const char *arg)
 Print a listing containing all the protocols supported by the program.
int opt_filters (const char *opt, const char *arg)
 Print a listing containing all the filters supported by the program.
int opt_pix_fmts (const char *opt, const char *arg)
 Print a listing containing all the pixel formats supported by the program.
int show_sample_fmts (const char *opt, const char *arg)
 Print a listing containing all the sample formats supported by the program.
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, AVCodec *codec, AVFormatContext *s, AVStream *st)
 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().
void * grow_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
AVDictionaryformat_opts
AVDictionarycodec_opts
const int this_year = 2012
 this year, defined by the program for show_banner()
static FILE * report_file
static int warned_cfg = 0


Define Documentation

#define FLAGS (  )     ((o)->type == AV_OPT_TYPE_FLAGS) ? AV_DICT_APPEND : 0

Definition at line 420 of file cmdutils.c.

Referenced by opt_default().

#define INDENT   1

Definition at line 571 of file cmdutils.c.

Referenced by print_program_info(), and show_banner().

#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 576 of file cmdutils.c.

Referenced by print_all_libs_info().

#define SHOW_CONFIG   4

Definition at line 573 of file cmdutils.c.

Referenced by show_banner().

#define SHOW_COPYRIGHT   8

Definition at line 574 of file cmdutils.c.

Referenced by print_program_info(), and show_banner().

#define SHOW_VERSION   2

Definition at line 572 of file cmdutils.c.

Referenced by opt_version(), and show_banner().

#define sws_isSupportedInput (  )     0

#define sws_isSupportedOutput (  )     0


Function Documentation

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 1046 of file cmdutils.c.

Referenced by copy_metadata(), filter_codec_opts(), opt_input_file(), opt_map(), and opt_output_file().

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:
bufptr location where pointer to buffer is returned
size location 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 959 of file cmdutils.c.

Referenced by transcode_init().

static void dump_argument ( const char *  a  )  [static]

Definition at line 374 of file cmdutils.c.

Referenced by parse_loglevel().

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

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:
s Corresponding format context.
st A stream from s for which the options should be filtered.
Returns:
a pointer to the created dictionary

Definition at line 1100 of file cmdutils.c.

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

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

Definition at line 167 of file cmdutils.c.

Referenced by locate_option(), and parse_option().

static char get_media_type_char ( enum AVMediaType  type  )  [static]

Definition at line 767 of file cmdutils.c.

Referenced by opt_codecs(), and opt_filters().

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.ffpreset 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 996 of file cmdutils.c.

Referenced by ffserver_opt_preset(), and opt_preset().

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_program() on failure.

Parameters:
elem_size size in bytes of each element
size new element count will be written here
Returns:
reallocated array

Definition at line 1175 of file cmdutils.c.

Referenced by add_input_streams(), new_output_stream(), opt_attach(), opt_input_file(), opt_map(), opt_map_channel(), opt_output_file(), opt_streamid(), and parse_option().

void init_opts ( void   ) 

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

Definition at line 63 of file cmdutils.c.

Referenced by main(), and reset_options().

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

Definition at line 348 of file cmdutils.c.

Referenced by parse_loglevel(), and show_banner().

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 81 of file cmdutils.c.

Referenced by opt_help(), and opt_version().

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

Definition at line 86 of file cmdutils.c.

Referenced by opt_report().

int opt_bsfs ( 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 842 of file cmdutils.c.

int opt_codec_debug ( const char *  opt,
const char *  arg 
)

Definition at line 540 of file cmdutils.c.

int opt_codecs ( 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 779 of file cmdutils.c.

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

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

Definition at line 421 of file cmdutils.c.

Referenced by opt_bitrate(), opt_codec_debug(), opt_frame_pix_fmt(), opt_frame_size(), opt_passlogfile(), opt_preset(), opt_target(), opt_video_channel(), and opt_video_standard().

int opt_filters ( 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 872 of file cmdutils.c.

int opt_formats ( const char *  opt,
const char *  arg 
)

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

This option processing function does not utilize the arguments.

Definition at line 719 of file cmdutils.c.

int opt_license ( 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 649 of file cmdutils.c.

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

Set the libav* libraries log level.

Definition at line 459 of file cmdutils.c.

Referenced by parse_loglevel().

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

Definition at line 526 of file cmdutils.c.

int opt_pix_fmts ( 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 904 of file cmdutils.c.

int opt_protocols ( 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 853 of file cmdutils.c.

int opt_report ( const char *  opt  ) 

Definition at line 494 of file cmdutils.c.

Referenced by parse_loglevel().

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

Limit the execution time.

Definition at line 546 of file cmdutils.c.

int opt_version ( 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 642 of file cmdutils.c.

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 398 of file cmdutils.c.

Referenced by main().

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 100 of file cmdutils.c.

Referenced by opt_height(), opt_pass(), opt_show_mode(), opt_streamid(), opt_timelimit(), opt_vsync(), opt_width(), 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 241 of file cmdutils.c.

Referenced by opt_audio_codec(), opt_audio_frames(), opt_audio_qscale(), opt_bitrate(), opt_data_codec(), opt_data_frames(), opt_old2new(), opt_qscale(), opt_recording_timestamp(), opt_subtitle_codec(), opt_target(), 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 314 of file cmdutils.c.

Referenced by main(), and parse_script().

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:
parse_date()

Definition at line 121 of file cmdutils.c.

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

static void prepare_app_arguments ( int *  argc_ptr,
char ***  argv_ptr 
) [inline, static]

Definition at line 235 of file cmdutils.c.

Referenced by parse_options().

static void print_all_libs_info ( int  flags,
int  level 
) [static]

Definition at line 603 of file cmdutils.c.

Referenced by opt_version(), and show_banner().

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 559 of file cmdutils.c.

Referenced by open_input_file(), opt_input_file(), opt_output_file(), read_thread(), and write_frame().

static void print_program_info ( int  flags,
int  level 
) [static]

Definition at line 617 of file cmdutils.c.

Referenced by opt_version(), and show_banner().

int read_yesno ( void   ) 

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

Definition at line 948 of file cmdutils.c.

Referenced by assert_file_overwrite().

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 1155 of file cmdutils.c.

Referenced by opt_input_file(), and read_thread().

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 631 of file cmdutils.c.

Referenced by main().

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 157 of file cmdutils.c.

Referenced by opt_help(), and show_help_children().

void show_help_options ( const OptionDef options,
const char *  msg,
int  mask,
int  value 
)

Definition at line 133 of file cmdutils.c.

Referenced by opt_help().

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

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

Definition at line 939 of file cmdutils.c.

void uninit_opts ( void   ) 

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

Definition at line 71 of file cmdutils.c.

Referenced by do_exit(), exit_program(), and reset_options().


Variable Documentation

Definition at line 57 of file cmdutils.c.

Referenced by main(), open_input_file(), opt_input_file(), opt_output_file(), and read_thread().

FILE* report_file [static]

Definition at line 61 of file cmdutils.c.

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

Definition at line 56 of file cmdutils.c.

Referenced by new_output_stream(), and queue_picture().

const int this_year = 2012

this year, defined by the program for show_banner()

Definition at line 59 of file cmdutils.c.

Referenced by ffprobe_show_program_version(), and print_program_info().

int warned_cfg = 0 [static]

Definition at line 569 of file cmdutils.c.


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