avf_showwaves.c File Reference

audio to video multimedia filter More...

#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "avfilter.h"
#include "formats.h"
#include "audio.h"
#include "video.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	frame_node
struct	ShowWavesContext

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

Enumerations
enum	ShowWavesMode {   MODE_POINT, MODE_LINE, MODE_P2P, MODE_CENTERED_LINE,   MODE_NB }

Functions
	AVFILTER_DEFINE_CLASS (showwaves)
static av_cold void	uninit (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static int	config_output (AVFilterLink *outlink)
static int	push_frame (AVFilterLink *outlink)
static int	push_single_pic (AVFilterLink *outlink)
static int	request_frame (AVFilterLink *outlink)
static void	draw_sample_point (uint8_t *buf, int height, int linesize, int16_t sample, int16_t *prev_y, int intensity)
static void	draw_sample_line (uint8_t *buf, int height, int linesize, int16_t sample, int16_t *prev_y, int intensity)
static void	draw_sample_p2p (uint8_t *buf, int height, int linesize, int16_t sample, int16_t *prev_y, int intensity)
static void	draw_sample_cline (uint8_t *buf, int height, int linesize, int16_t sample, int16_t *prev_y, int intensity)
static int	alloc_out_frame (ShowWavesContext *showwaves, const int16_t *p, const AVFilterLink *inlink, AVFilterLink *outlink, const AVFrame *in)
static av_cold int	init (AVFilterContext *ctx)

Variables
static const AVOption	showwaves_options []

Detailed Description

audio to video multimedia filter

Definition in file avf_showwaves.c.

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(ShowWavesContext, x)

Definition at line 72 of file avf_showwaves.c.

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 73 of file avf_showwaves.c.

Enumeration Type Documentation

enum ShowWavesMode

Enumerator
MODE_POINT
MODE_LINE
MODE_P2P
MODE_CENTERED_LINE
MODE_NB

Definition at line 36 of file avf_showwaves.c.

Function Documentation

AVFILTER_DEFINE_CLASS

(

showwaves

)

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 92 of file avf_showwaves.c.

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 113 of file avf_showwaves.c.

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 147 of file avf_showwaves.c.

static int push_frame ( AVFilterLink *  outlink )

inlinestatic

Definition at line 174 of file avf_showwaves.c.

Referenced by push_single_pic(), and request_frame().

static int push_single_pic ( AVFilterLink *  outlink )

static

Definition at line 191 of file avf_showwaves.c.

Referenced by request_frame().

static int request_frame ( AVFilterLink *  outlink )

static

Definition at line 240 of file avf_showwaves.c.

static void draw_sample_point ( uint8_t *  buf, int  height, int  linesize, int16_t  sample, int16_t *  prev_y, int  intensity  )

static

Definition at line 261 of file avf_showwaves.c.

Referenced by init().

static void draw_sample_line ( uint8_t *  buf, int  height, int  linesize, int16_t  sample, int16_t *  prev_y, int  intensity  )

static

Definition at line 269 of file avf_showwaves.c.

Referenced by init().

static void draw_sample_p2p ( uint8_t *  buf, int  height, int  linesize, int16_t  sample, int16_t *  prev_y, int  intensity  )

static

Definition at line 282 of file avf_showwaves.c.

Referenced by init().

static void draw_sample_cline ( uint8_t *  buf, int  height, int  linesize, int16_t  sample, int16_t *  prev_y, int  intensity  )

static

Definition at line 301 of file avf_showwaves.c.

Referenced by init().

static int alloc_out_frame ( ShowWavesContext *  showwaves, const int16_t *  p, const AVFilterLink *  inlink, AVFilterLink *  outlink, const AVFrame *  in  )

static

Definition at line 312 of file avf_showwaves.c.

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 333 of file avf_showwaves.c.

Variable Documentation

const AVOption showwaves_options[]

static

Initial value:

= {
    { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
    { "s",    "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
    { "mode", "select display mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_POINT}, 0, MODE_NB-1, FLAGS, "mode"},
        { "point", "draw a point for each sample",         0, AV_OPT_TYPE_CONST, {.i64=MODE_POINT},         .flags=FLAGS, .unit="mode"},
        { "line",  "draw a line for each sample",          0, AV_OPT_TYPE_CONST, {.i64=MODE_LINE},          .flags=FLAGS, .unit="mode"},
        { "p2p",   "draw a line between samples",          0, AV_OPT_TYPE_CONST, {.i64=MODE_P2P},           .flags=FLAGS, .unit="mode"},
        { "cline", "draw a centered line for each sample", 0, AV_OPT_TYPE_CONST, {.i64=MODE_CENTERED_LINE}, .flags=FLAGS, .unit="mode"},
    { "n",    "set how many samples to show in the same point", OFFSET(n), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
    { "rate", "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, FLAGS },
    { "r",    "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, FLAGS },
    { "split_channels", "draw channels separately", OFFSET(split_channels), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, FLAGS },
    { NULL }
}

Definition at line 75 of file avf_showwaves.c.