avf_aphasemeter.c File Reference

#include "libavutil/channel_layout.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/timestamp.h"
#include "avfilter.h"
#include "formats.h"
#include "audio.h"
#include "video.h"
#include "internal.h"
#include "float.h"

Go to the source code of this file.

Data Structures
struct	AudioPhaseMeterContext

Macros
#define	MAX_DURATION   (24*60*60*1000000LL)
#define	OFFSET(x)   offsetof(AudioPhaseMeterContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define	get_duration(index)   (index[1] - index[0])

Functions
	AVFILTER_DEFINE_CLASS (aphasemeter)
static int	query_formats (AVFilterContext *ctx)
static int	config_input (AVFilterLink *inlink)
static int	config_video_output (AVFilterLink *outlink)
static int	get_x (float phase, int w)
static void	add_metadata (AVFrame *insamples, const char *key, char *value)
static void	update_mono_detection (AudioPhaseMeterContext *s, AVFrame *insamples, int mono_measurement)
static void	update_out_phase_detection (AudioPhaseMeterContext *s, AVFrame *insamples, int out_phase_measurement)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static av_cold void	uninit (AVFilterContext *ctx)
static av_cold int	init (AVFilterContext *ctx)

Variables
static const AVOption	aphasemeter_options []
static const AVFilterPad	inputs []
const AVFilter	ff_avf_aphasemeter

Detailed Description

audio to video multimedia aphasemeter filter

Definition in file avf_aphasemeter.c.

Macro Definition Documentation

MAX_DURATION

#define MAX_DURATION   (24*60*60*1000000LL)

Definition at line 63 of file avf_aphasemeter.c.

OFFSET

#define OFFSET

(

x

)

offsetof(AudioPhaseMeterContext, x)

Definition at line 64 of file avf_aphasemeter.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 65 of file avf_aphasemeter.c.

get_duration

#define get_duration

(

index

)

(index[1] - index[0])

Definition at line 66 of file avf_aphasemeter.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

aphasemeter

)

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 90 of file avf_aphasemeter.c.

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 125 of file avf_aphasemeter.c.

config_video_output()

static int config_video_output ( AVFilterLink *  outlink )

static

Definition at line 141 of file avf_aphasemeter.c.

Referenced by init().

get_x()

static int get_x ( float  phase, int  w  )

inlinestatic

Definition at line 161 of file avf_aphasemeter.c.

Referenced by filter_frame().

add_metadata()

static void add_metadata ( AVFrame *  insamples, const char *  key, char *  value  )

inlinestatic

Definition at line 166 of file avf_aphasemeter.c.

Referenced by filter_frame(), update_mono_detection(), and update_out_phase_detection().

update_mono_detection()

static void update_mono_detection ( AudioPhaseMeterContext *  s, AVFrame *  insamples, int  mono_measurement  )

inlinestatic

Definition at line 174 of file avf_aphasemeter.c.

Referenced by filter_frame(), and uninit().

update_out_phase_detection()

static void update_out_phase_detection ( AudioPhaseMeterContext *  s, AVFrame *  insamples, int  out_phase_measurement  )

inlinestatic

Definition at line 205 of file avf_aphasemeter.c.

Referenced by filter_frame(), and uninit().

filter_frame()

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

static

Definition at line 236 of file avf_aphasemeter.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 338 of file avf_aphasemeter.c.

init()

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 349 of file avf_aphasemeter.c.

Variable Documentation

aphasemeter_options

const AVOption aphasemeter_options[]

static

Initial value:

= {
    { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
    { "r",    "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
    { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="800x400"}, 0, 0, FLAGS },
    { "s",    "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="800x400"}, 0, 0, FLAGS },
    { "rc", "set red contrast",   OFFSET(contrast[0]), AV_OPT_TYPE_INT, {.i64=2}, 0, 255, FLAGS },
    { "gc", "set green contrast", OFFSET(contrast[1]), AV_OPT_TYPE_INT, {.i64=7}, 0, 255, FLAGS },
    { "bc", "set blue contrast",  OFFSET(contrast[2]), AV_OPT_TYPE_INT, {.i64=1}, 0, 255, FLAGS },
    { "mpc", "set median phase color", OFFSET(mpc_str), AV_OPT_TYPE_STRING, {.str = "none"}, 0, 0, FLAGS },
    { "video", "set video output", OFFSET(do_video), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
    { "phasing", "set mono and out-of-phase detection output", OFFSET(do_phasing_detection), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
    { "tolerance", "set phase tolerance for mono detection", OFFSET(tolerance), AV_OPT_TYPE_FLOAT, {.dbl = 0.}, 0, 1, FLAGS },
    { "t",         "set phase tolerance for mono detection", OFFSET(tolerance), AV_OPT_TYPE_FLOAT, {.dbl = 0.}, 0, 1, FLAGS },
    { "angle", "set angle threshold for out-of-phase detection", OFFSET(angle), AV_OPT_TYPE_FLOAT, {.dbl = 170.}, 90, 180, FLAGS },
    { "a",     "set angle threshold for out-of-phase detection", OFFSET(angle), AV_OPT_TYPE_FLOAT, {.dbl = 170.}, 90, 180, FLAGS },
    { "duration", "set minimum mono or out-of-phase duration in seconds", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=2000000}, 0, MAX_DURATION, FLAGS },
    { "d",        "set minimum mono or out-of-phase duration in seconds", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=2000000}, 0, MAX_DURATION, FLAGS },
    { NULL }
}

Definition at line 68 of file avf_aphasemeter.c.

inputs

const AVFilterPad inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_AUDIO,
        .config_props = config_input,
        .filter_frame = filter_frame,
    },
}

Definition at line 377 of file avf_aphasemeter.c.

ff_avf_aphasemeter

const AVFilter ff_avf_aphasemeter

Initial value:

= {
    .name          = "aphasemeter",
    .description   = NULL_IF_CONFIG_SMALL("Convert input audio to phase meter video output."),
    .init          = init,
    .uninit        = uninit,
    .priv_size     = sizeof(AudioPhaseMeterContext),
    FILTER_INPUTS(inputs),
    .outputs       = NULL,
    FILTER_QUERY_FUNC(query_formats),
    .priv_class    = &aphasemeter_class,
    .flags         = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
}

Definition at line 386 of file avf_aphasemeter.c.