FFmpeg
Data Structures | Macros | Enumerations | Functions | Variables
avf_ahistogram.c File Reference
#include "libavutil/avassert.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "audio.h"
#include "video.h"
#include "internal.h"

Go to the source code of this file.

Data Structures

struct  AudioHistogramContext
 

Macros

#define OFFSET(x)   offsetof(AudioHistogramContext, x)
 
#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
 

Enumerations

enum  DisplayScale {
  LINEAR, SQRT, CBRT, LOG,
  RLOG, NB_SCALES, LINEAR, SQRT,
  CBRT, LOG, FOURTHRT, FIFTHRT,
  NB_SCALES, LINEAR, LOG, NB_DISPLAY_SCALE
}
 
enum  AmplitudeScale {
  ALINEAR, ALOG, NB_ASCALES, AS_LINEAR,
  AS_SQRT, AS_CBRT, AS_LOG, NB_ASCALES
}
 
enum  SlideMode {
  REPLACE, SCROLL, NB_SLIDES, REPLACE,
  SCROLL, FULLFRAME, RSCROLL, NB_SLIDES,
  REPLACE, SCROLL, FULLFRAME, RSCROLL,
  NB_SLIDES
}
 
enum  DisplayMode {
  SINGLE, SEPARATE, NB_DMODES, LINE,
  BAR, DOT, NB_MODES, COMBINED,
  SEPARATE, NB_MODES
}
 
enum  HistogramMode { ACCUMULATE, CURRENT, NB_HMODES }
 

Functions

 AVFILTER_DEFINE_CLASS (ahistogram)
 
static int query_formats (AVFilterContext *ctx)
 
static int config_input (AVFilterLink *inlink)
 
static int config_output (AVFilterLink *outlink)
 
static int filter_frame (AVFilterLink *inlink, AVFrame *in)
 
static int activate (AVFilterContext *ctx)
 
static av_cold void uninit (AVFilterContext *ctx)
 

Variables

static const AVOption ahistogram_options []
 
static const AVFilterPad ahistogram_inputs []
 
static const AVFilterPad ahistogram_outputs []
 
AVFilter ff_avf_ahistogram
 

Macro Definition Documentation

#define OFFSET (   x)    offsetof(AudioHistogramContext, x)

Definition at line 61 of file avf_ahistogram.c.

Definition at line 62 of file avf_ahistogram.c.

Enumeration Type Documentation

Enumerator
LINEAR 
SQRT 
CBRT 
LOG 
RLOG 
NB_SCALES 
LINEAR 
SQRT 
CBRT 
LOG 
FOURTHRT 
FIFTHRT 
NB_SCALES 
LINEAR 
LOG 
NB_DISPLAY_SCALE 

Definition at line 31 of file avf_ahistogram.c.

Enumerator
ALINEAR 
ALOG 
NB_ASCALES 
AS_LINEAR 
AS_SQRT 
AS_CBRT 
AS_LOG 
NB_ASCALES 

Definition at line 32 of file avf_ahistogram.c.

enum SlideMode
Enumerator
REPLACE 
SCROLL 
NB_SLIDES 
REPLACE 
SCROLL 
FULLFRAME 
RSCROLL 
NB_SLIDES 
REPLACE 
SCROLL 
FULLFRAME 
RSCROLL 
NB_SLIDES 

Definition at line 33 of file avf_ahistogram.c.

Enumerator
SINGLE 
SEPARATE 
NB_DMODES 
LINE 
BAR 
DOT 
NB_MODES 
COMBINED 
SEPARATE 
NB_MODES 

Definition at line 34 of file avf_ahistogram.c.

Enumerator
ACCUMULATE 
CURRENT 
NB_HMODES 

Definition at line 35 of file avf_ahistogram.c.

Function Documentation

AVFILTER_DEFINE_CLASS ( ahistogram  )
static int query_formats ( AVFilterContext ctx)
static

Definition at line 91 of file avf_ahistogram.c.

static int config_input ( AVFilterLink inlink)
static

Definition at line 118 of file avf_ahistogram.c.

static int config_output ( AVFilterLink outlink)
static

Definition at line 136 of file avf_ahistogram.c.

static int filter_frame ( AVFilterLink inlink,
AVFrame in 
)
static

Definition at line 157 of file avf_ahistogram.c.

Referenced by activate().

static int activate ( AVFilterContext ctx)
static

Definition at line 369 of file avf_ahistogram.c.

static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 391 of file avf_ahistogram.c.

Variable Documentation

const AVOption ahistogram_options[]
static
Initial value:
= {
{ "dmode", "set method to display channels", OFFSET(dmode), AV_OPT_TYPE_INT, {.i64=SINGLE}, 0, NB_DMODES-1, FLAGS, "dmode" },
{ "single", "all channels use single histogram", 0, AV_OPT_TYPE_CONST, {.i64=SINGLE}, 0, 0, FLAGS, "dmode" },
{ "separate", "each channel have own histogram", 0, AV_OPT_TYPE_CONST, {.i64=SEPARATE}, 0, 0, FLAGS, "dmode" },
{ "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="hd720"}, 0, 0, FLAGS },
{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="hd720"}, 0, 0, FLAGS },
{ "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LOG}, LINEAR, NB_SCALES-1, FLAGS, "scale" },
{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, "scale" },
{ "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, "scale" },
{ "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, FLAGS, "scale" },
{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, "scale" },
{ "rlog", "reverse logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=RLOG}, 0, 0, FLAGS, "scale" },
{ "ascale", "set amplitude scale", OFFSET(ascale), AV_OPT_TYPE_INT, {.i64=ALOG}, LINEAR, NB_ASCALES-1, FLAGS, "ascale" },
{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=ALOG}, 0, 0, FLAGS, "ascale" },
{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=ALINEAR}, 0, 0, FLAGS, "ascale" },
{ "acount", "how much frames to accumulate", OFFSET(count), AV_OPT_TYPE_INT, {.i64=1}, -1, 100, FLAGS },
{ "rheight", "set histogram ratio of window height", OFFSET(phisto), AV_OPT_TYPE_FLOAT, {.dbl=0.10}, 0, 1, FLAGS },
{ "slide", "set sonogram sliding", OFFSET(slide), AV_OPT_TYPE_INT, {.i64=REPLACE}, 0, NB_SLIDES-1, FLAGS, "slide" },
{ "replace", "replace old rows with new", 0, AV_OPT_TYPE_CONST, {.i64=REPLACE}, 0, 0, FLAGS, "slide" },
{ "scroll", "scroll from top to bottom", 0, AV_OPT_TYPE_CONST, {.i64=SCROLL}, 0, 0, FLAGS, "slide" },
{ NULL }
}
#define NULL
Definition: coverity.c:32
#define OFFSET(x)
GLsizei count
Definition: opengl_enc.c:108
#define FLAGS
uint8_t w
Definition: llviddspenc.c:38
offset must point to AVRational
Definition: opt.h:236
offset must point to two consecutive integers
Definition: opt.h:233

Definition at line 64 of file avf_ahistogram.c.

const AVFilterPad ahistogram_inputs[]
static
Initial value:
= {
{
.name = "default",
.config_props = config_input,
},
{ NULL }
}
#define NULL
Definition: coverity.c:32
static int config_input(AVFilterLink *inlink)

Definition at line 404 of file avf_ahistogram.c.

const AVFilterPad ahistogram_outputs[]
static
Initial value:
= {
{
.name = "default",
.config_props = config_output,
},
{ NULL }
}
#define NULL
Definition: coverity.c:32
static int config_output(AVFilterLink *outlink)

Definition at line 413 of file avf_ahistogram.c.

AVFilter ff_avf_ahistogram
Initial value:
= {
.name = "ahistogram",
.description = NULL_IF_CONFIG_SMALL("Convert input audio to histogram video output."),
.uninit = uninit,
.query_formats = query_formats,
.priv_size = sizeof(AudioHistogramContext),
.priv_class = &ahistogram_class,
}
static const AVFilterPad ahistogram_inputs[]
static int query_formats(AVFilterContext *ctx)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
static int activate(AVFilterContext *ctx)
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
static const AVFilterPad ahistogram_outputs[]
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
static av_cold void uninit(AVFilterContext *ctx)

Definition at line 422 of file avf_ahistogram.c.