af_astats.c File Reference

#include <float.h>
#include "libavutil/opt.h"
#include "audio.h"
#include "avfilter.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	ChannelStats
struct	AudioStatsContext

Macros
#define	OFFSET(x)   offsetof(AudioStatsContext, x)
#define	FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	LINEAR_TO_DB(x)   (log10(x) * 20)

Functions
	AVFILTER_DEFINE_CLASS (astats)
static int	query_formats (AVFilterContext *ctx)
static void	reset_stats (AudioStatsContext *s)
static int	config_output (AVFilterLink *outlink)
static unsigned	bit_depth (uint64_t mask)
static void	update_stat (AudioStatsContext *s, ChannelStats *p, double d)
static void	set_meta (AVDictionary **metadata, int chan, const char *key, const char *fmt, double val)
static void	set_metadata (AudioStatsContext *s, AVDictionary **metadata)
static int	filter_frame (AVFilterLink *inlink, AVFrame *buf)
static void	print_stats (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	astats_options []
static const AVFilterPad	astats_inputs []
static const AVFilterPad	astats_outputs []
AVFilter	ff_af_astats

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(AudioStatsContext, x)

Definition at line 55 of file af_astats.c.

#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 56 of file af_astats.c.

#define LINEAR_TO_DB

(

x

)

(log10(x) * 20)

Definition at line 193 of file af_astats.c.

Referenced by print_stats(), and set_metadata().

Function Documentation

AVFILTER_DEFINE_CLASS

(

astats

)

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 67 of file af_astats.c.

static void reset_stats ( AudioStatsContext *  s )

static

Definition at line 97 of file af_astats.c.

Referenced by config_output(), and filter_frame().

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 112 of file af_astats.c.

static unsigned bit_depth ( uint64_t  mask )

static

Definition at line 128 of file af_astats.c.

Referenced by checkasm_check_h264pred(), checkasm_check_h264qpel(), dnxhd_encode_init(), dnxhd_init_vlc(), ff_dnxhd_find_cid(), ff_yadif_init_x86(), hl_decode_mb(), hl_decode_mb_444(), matroska_parse_tracks(), mkv_write_track(), print_stats(), and set_metadata().

static void update_stat ( AudioStatsContext *  s, ChannelStats *  p, double  d  )

inlinestatic

Definition at line 137 of file af_astats.c.

Referenced by filter_frame().

static void set_meta ( AVDictionary **  metadata, int  chan, const char *  key, const char *  fmt, double  val  )

static

Definition at line 179 of file af_astats.c.

Referenced by set_metadata().

static void set_metadata ( AudioStatsContext *  s, AVDictionary **  metadata  )

static

Definition at line 195 of file af_astats.c.

Referenced by filter_frame().

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

static

Definition at line 264 of file af_astats.c.

static void print_stats ( AVFilterContext *  ctx )

static

Definition at line 306 of file af_astats.c.

Referenced by uninit().

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 380 of file af_astats.c.

Variable Documentation

const AVOption astats_options[]

static

Initial value:

= {
    { "length", "set the window length", OFFSET(time_constant), AV_OPT_TYPE_DOUBLE, {.dbl=.05}, .01, 10, FLAGS },
    { "metadata", "inject metadata in the filtergraph", OFFSET(metadata), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS },
    { "reset", "recalculate stats after this many frames", OFFSET(reset_count), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS },
    { NULL }
}

Definition at line 58 of file af_astats.c.

const AVFilterPad astats_inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_AUDIO,
        .filter_frame = filter_frame,
    },
    { NULL }
}

Definition at line 389 of file af_astats.c.

const AVFilterPad astats_outputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_AUDIO,
        .config_props = config_output,
    },
    { NULL }
}

Definition at line 398 of file af_astats.c.

AVFilter ff_af_astats

Initial value:

= {
    .name          = "astats",
    .description   = NULL_IF_CONFIG_SMALL("Show time domain statistics about audio frames."),
    .query_formats = query_formats,
    .priv_size     = sizeof(AudioStatsContext),
    .priv_class    = &astats_class,
    .uninit        = uninit,
    .inputs        = astats_inputs,
    .outputs       = astats_outputs,
}

Definition at line 407 of file af_astats.c.