f_metadata.c File Reference

filter for manipulating frame metadata More...

#include "config_components.h"
#include <float.h>
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/eval.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "libavutil/timestamp.h"
#include "libavformat/avio.h"
#include "avfilter.h"
#include "audio.h"
#include "filters.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	MetadataContext

Macros
#define	OFFSET(x)
#define	DEFINE_OPTIONS(filt_name, FLAGS)

Enumerations
enum	MetadataMode {   METADATA_SELECT , METADATA_ADD , METADATA_MODIFY , METADATA_DELETE ,   METADATA_PRINT , METADATA_NB }
enum	MetadataFunction {   METADATAF_SAME_STR , METADATAF_STARTS_WITH , METADATAF_LESS , METADATAF_EQUAL ,   METADATAF_GREATER , METADATAF_EXPR , METADATAF_ENDS_WITH , METADATAF_NB }
enum	var_name {   VAR_VALUE1 , VAR_VALUE2 , VAR_FRAMEVAL , VAR_USERVAL ,   VAR_VARS_NB }

Functions
static int	same_str (MetadataContext *s, const char *value1, const char *value2)
static int	starts_with (MetadataContext *s, const char *value1, const char *value2)
static int	ends_with (MetadataContext *s, const char *value1, const char *value2)
static int	equal (MetadataContext *s, const char *value1, const char *value2)
static int	less (MetadataContext *s, const char *value1, const char *value2)
static int	greater (MetadataContext *s, const char *value1, const char *value2)
static int	parse_expr (MetadataContext *s, const char *value1, const char *value2)
static void	print_log (AVFilterContext *ctx, const char *msg,...)
static void	print_file (AVFilterContext *ctx, const char *msg,...)
static av_cold int	init (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)
static int	filter_frame (AVFilterLink *inlink, AVFrame *frame)

Variables
static const char *const	var_names []

Detailed Description

filter for manipulating frame metadata

Definition in file f_metadata.c.

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(MetadataContext, x)

Definition at line 100 of file f_metadata.c.

DEFINE_OPTIONS

#define DEFINE_OPTIONS	(		filt_name,
			FLAGS )

Value:

static const AVOption filt_name##_options[] = { \
    { "mode", "set a mode of operation", OFFSET(mode),   AV_OPT_TYPE_INT,    {.i64 = 0 }, 0, METADATA_NB-1, FLAGS, .unit = "mode" }, \
    {   "select", "select frame",        0,              AV_OPT_TYPE_CONST,  {.i64 = METADATA_SELECT }, 0, 0, FLAGS, .unit = "mode" }, \
    {   "add",    "add new metadata",    0,              AV_OPT_TYPE_CONST,  {.i64 = METADATA_ADD },    0, 0, FLAGS, .unit = "mode" }, \
    {   "modify", "modify metadata",     0,              AV_OPT_TYPE_CONST,  {.i64 = METADATA_MODIFY }, 0, 0, FLAGS, .unit = "mode" }, \
    {   "delete", "delete metadata",     0,              AV_OPT_TYPE_CONST,  {.i64 = METADATA_DELETE }, 0, 0, FLAGS, .unit = "mode" }, \
    {   "print",  "print metadata",      0,              AV_OPT_TYPE_CONST,  {.i64 = METADATA_PRINT },  0, 0, FLAGS, .unit = "mode" }, \
    { "key",   "set metadata key",       OFFSET(key),    AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, FLAGS }, \
    { "value", "set metadata value",     OFFSET(value),  AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, FLAGS }, \
    { "function", "function for comparing values", OFFSET(function), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, METADATAF_NB-1, FLAGS, .unit = "function" }, \
    {   "same_str",    NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_SAME_STR },    0, 3, FLAGS, .unit = "function" }, \
    {   "starts_with", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_STARTS_WITH }, 0, 0, FLAGS, .unit = "function" }, \
    {   "less",        NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_LESS    },     0, 3, FLAGS, .unit = "function" }, \
    {   "equal",       NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_EQUAL   },     0, 3, FLAGS, .unit = "function" }, \
    {   "greater",     NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_GREATER },     0, 3, FLAGS, .unit = "function" }, \
    {   "expr",        NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_EXPR    },     0, 3, FLAGS, .unit = "function" }, \
    {   "ends_with",   NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_ENDS_WITH },   0, 0, FLAGS, .unit = "function" }, \
    { "expr", "set expression for expr function", OFFSET(expr_str), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, FLAGS }, \
    { "file", "set file where to print metadata information", OFFSET(file_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS }, \
    { "direct", "reduce buffering when printing to user-set file or pipe", OFFSET(direct), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS }, \
    { NULL } \
}

Definition at line 101 of file f_metadata.c.

Enumeration Type Documentation

MetadataMode

enum MetadataMode

Enumerator
METADATA_SELECT
METADATA_ADD
METADATA_MODIFY
METADATA_DELETE
METADATA_PRINT
METADATA_NB

Definition at line 42 of file f_metadata.c.

MetadataFunction

enum MetadataFunction

Enumerator
METADATAF_SAME_STR
METADATAF_STARTS_WITH
METADATAF_LESS
METADATAF_EQUAL
METADATAF_GREATER
METADATAF_EXPR
METADATAF_ENDS_WITH
METADATAF_NB

Definition at line 51 of file f_metadata.c.

var_name

enum var_name

Enumerator
VAR_VALUE1
VAR_VALUE2
VAR_FRAMEVAL
VAR_USERVAL
VAR_VARS_NB

Definition at line 70 of file f_metadata.c.

Function Documentation

same_str()

static int same_str ( MetadataContext * s, const char * value1, const char * value2 )

static

Definition at line 125 of file f_metadata.c.

Referenced by init().

starts_with()

static int starts_with ( MetadataContext * s, const char * value1, const char * value2 )

static

Definition at line 130 of file f_metadata.c.

Referenced by init().

ends_with()

static int ends_with ( MetadataContext * s, const char * value1, const char * value2 )

static

Definition at line 135 of file f_metadata.c.

Referenced by init().

equal()

static int equal ( MetadataContext * s, const char * value1, const char * value2 )

static

Definition at line 143 of file f_metadata.c.

Referenced by init().

less()

static int less ( MetadataContext * s, const char * value1, const char * value2 )

static

Definition at line 153 of file f_metadata.c.

greater()

static int greater ( MetadataContext * s, const char * value1, const char * value2 )

static

Definition at line 163 of file f_metadata.c.

Referenced by init().

parse_expr()

static int parse_expr ( MetadataContext * s, const char * value1, const char * value2 )

static

Definition at line 173 of file f_metadata.c.

Referenced by init().

print_log()

static void print_log ( AVFilterContext * ctx, const char * msg, ... )

static

Definition at line 186 of file f_metadata.c.

Referenced by init().

print_file()

static void print_file ( AVFilterContext * ctx, const char * msg, ... )

static

Definition at line 196 of file f_metadata.c.

Referenced by init().

init()

static av_cold int init ( AVFilterContext * ctx )

static

Definition at line 210 of file f_metadata.c.

uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 291 of file f_metadata.c.

filter_frame()

static int filter_frame ( AVFilterLink * inlink, AVFrame * frame )

static

Definition at line 302 of file f_metadata.c.

Variable Documentation

var_names

const char* const var_names[]

static

Initial value:

= {
    "VALUE1",
    "VALUE2",
    "FRAMEVAL",
    "USERVAL",
    NULL
}

Definition at line 62 of file f_metadata.c.