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avf_showwaves.c File Reference

audio to video multimedia filter More...

#include "libavutil/avassert.h"
#include "libavutil/avstring.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
}
 
enum  ShowWavesScale { SCALE_LIN, SCALE_LOG, SCALE_NB }
 

Functions

 AVFILTER_DEFINE_CLASS (showwaves)
 
static av_cold void uninit (AVFilterContext *ctx)
 
static int query_formats (AVFilterContext *ctx)
 
static int get_lin_h (int16_t sample, int height)
 
static int get_lin_h2 (int16_t sample, int height)
 
static int get_log_h (int16_t sample, int height)
 
static int get_log_h2 (int16_t sample, int height)
 
static void draw_sample_point_rgba (uint8_t *buf, int height, int linesize, int16_t *prev_y, const uint8_t color[4], int h)
 
static void draw_sample_line_rgba (uint8_t *buf, int height, int linesize, int16_t *prev_y, const uint8_t color[4], int h)
 
static void draw_sample_p2p_rgba (uint8_t *buf, int height, int linesize, int16_t *prev_y, const uint8_t color[4], int h)
 
static void draw_sample_cline_rgba (uint8_t *buf, int height, int linesize, int16_t *prev_y, const uint8_t color[4], int h)
 
static void draw_sample_point_gray (uint8_t *buf, int height, int linesize, int16_t *prev_y, const uint8_t color[4], int h)
 
static void draw_sample_line_gray (uint8_t *buf, int height, int linesize, int16_t *prev_y, const uint8_t color[4], int h)
 
static void draw_sample_p2p_gray (uint8_t *buf, int height, int linesize, int16_t *prev_y, const uint8_t color[4], int h)
 
static void draw_sample_cline_gray (uint8_t *buf, int height, int linesize, int16_t *prev_y, const uint8_t color[4], int h)
 
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 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 84 of file avf_showwaves.c.

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 85 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 37 of file avf_showwaves.c.

enum ShowWavesScale
Enumerator
SCALE_LIN 
SCALE_LOG 
SCALE_NB 

Definition at line 45 of file avf_showwaves.c.

Function Documentation

AVFILTER_DEFINE_CLASS ( showwaves  )
static av_cold void uninit ( AVFilterContext *  ctx)
static

Definition at line 108 of file avf_showwaves.c.

static int query_formats ( AVFilterContext *  ctx)
static

Definition at line 130 of file avf_showwaves.c.

static int get_lin_h ( int16_t  sample,
int  height 
)
static

Definition at line 161 of file avf_showwaves.c.

Referenced by config_output().

static int get_lin_h2 ( int16_t  sample,
int  height 
)
static

Definition at line 166 of file avf_showwaves.c.

Referenced by config_output().

static int get_log_h ( int16_t  sample,
int  height 
)
static

Definition at line 171 of file avf_showwaves.c.

Referenced by config_output().

static int get_log_h2 ( int16_t  sample,
int  height 
)
static

Definition at line 176 of file avf_showwaves.c.

Referenced by config_output().

static void draw_sample_point_rgba ( uint8_t *  buf,
int  height,
int  linesize,
int16_t *  prev_y,
const uint8_t  color[4],
int  h 
)
static

Definition at line 181 of file avf_showwaves.c.

Referenced by config_output().

static void draw_sample_line_rgba ( uint8_t *  buf,
int  height,
int  linesize,
int16_t *  prev_y,
const uint8_t  color[4],
int  h 
)
static

Definition at line 193 of file avf_showwaves.c.

Referenced by config_output().

static void draw_sample_p2p_rgba ( uint8_t *  buf,
int  height,
int  linesize,
int16_t *  prev_y,
const uint8_t  color[4],
int  h 
)
static

Definition at line 210 of file avf_showwaves.c.

Referenced by config_output().

static void draw_sample_cline_rgba ( uint8_t *  buf,
int  height,
int  linesize,
int16_t *  prev_y,
const uint8_t  color[4],
int  h 
)
static

Definition at line 236 of file avf_showwaves.c.

Referenced by config_output().

static void draw_sample_point_gray ( uint8_t *  buf,
int  height,
int  linesize,
int16_t *  prev_y,
const uint8_t  color[4],
int  h 
)
static

Definition at line 251 of file avf_showwaves.c.

Referenced by config_output().

static void draw_sample_line_gray ( uint8_t *  buf,
int  height,
int  linesize,
int16_t *  prev_y,
const uint8_t  color[4],
int  h 
)
static

Definition at line 259 of file avf_showwaves.c.

Referenced by config_output().

static void draw_sample_p2p_gray ( uint8_t *  buf,
int  height,
int  linesize,
int16_t *  prev_y,
const uint8_t  color[4],
int  h 
)
static

Definition at line 272 of file avf_showwaves.c.

Referenced by config_output().

static void draw_sample_cline_gray ( uint8_t *  buf,
int  height,
int  linesize,
int16_t *  prev_y,
const uint8_t  color[4],
int  h 
)
static

Definition at line 291 of file avf_showwaves.c.

Referenced by config_output().

static int config_output ( AVFilterLink *  outlink)
static

Definition at line 302 of file avf_showwaves.c.

static int push_frame ( AVFilterLink *  outlink)
inlinestatic

Definition at line 414 of file avf_showwaves.c.

Referenced by push_single_pic(), and request_frame().

static int push_single_pic ( AVFilterLink *  outlink)
static

Definition at line 430 of file avf_showwaves.c.

Referenced by request_frame().

static int request_frame ( AVFilterLink *  outlink)
static

Definition at line 487 of file avf_showwaves.c.

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

Definition at line 504 of file avf_showwaves.c.

static av_cold int init ( AVFilterContext *  ctx)
static

Definition at line 525 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_BOOL, {.i64 = 0}, 0, 1, FLAGS },
{ "colors", "set channels colors", OFFSET(colors), AV_OPT_TYPE_STRING, {.str = "red|green|blue|yellow|orange|lime|pink|magenta|brown" }, 0, 0, FLAGS },
{ "scale", "set amplitude scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, SCALE_NB-1, FLAGS, .unit="scale" },
{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_LIN}, .flags=FLAGS, .unit="scale"},
{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_LOG}, .flags=FLAGS, .unit="scale"},
{ NULL }
}
NULL
#define NULL
Definition: coverity.c:32
OFFSET
#define OFFSET(x)
Definition: avf_showwaves.c:84
AV_OPT_TYPE_INT
Definition: opt.h:223
SCALE_LIN
Definition: avf_showwaves.c:46
MODE_P2P
Definition: avf_showwaves.c:40
MODE_NB
Definition: avf_showwaves.c:42
MODE_POINT
Definition: avf_showwaves.c:38
AV_OPT_TYPE_CONST
Definition: opt.h:231
mode
mode
Definition: f_perms.c:27
MODE_CENTERED_LINE
Definition: avf_showwaves.c:41
AV_OPT_TYPE_STRING
Definition: opt.h:227
SCALE_NB
Definition: avf_showwaves.c:48
AV_OPT_TYPE_BOOL
Definition: opt.h:239
n
int n
Definition: avisynth_c.h:547
AV_OPT_TYPE_VIDEO_RATE
offset must point to AVRational
Definition: opt.h:235
MODE_LINE
Definition: avf_showwaves.c:39
AV_OPT_TYPE_IMAGE_SIZE
offset must point to two consecutive integers
Definition: opt.h:232
FLAGS
#define FLAGS
Definition: avf_showwaves.c:85
SCALE_LOG
Definition: avf_showwaves.c:47

Definition at line 87 of file avf_showwaves.c.

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