vf_psnr.c File Reference

Caculate the PSNR between two input videos. More...

#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "dualinput.h"
#include "drawutils.h"
#include "formats.h"
#include "internal.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	PSNRContext

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

Functions
	AVFILTER_DEFINE_CLASS (psnr)
static int	pow2 (int base)
static double	get_psnr (double mse, uint64_t nb_frames, int max)
static void	compute_images_mse (const uint8_t *main_data[4], const int main_linesizes[4], const uint8_t *ref_data[4], const int ref_linesizes[4], int w, int h, const AVPixFmtDescriptor *desc, double mse[4])
static void	set_meta (AVDictionary **metadata, const char *key, char comp, float d)
static AVFrame *	do_psnr (AVFilterContext *ctx, AVFrame *main, const AVFrame *ref)
static av_cold int	init (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static int	config_input_ref (AVFilterLink *inlink)
static int	config_output (AVFilterLink *outlink)
static int	filter_frame_main (AVFilterLink *inlink, AVFrame *inpicref)
static int	filter_frame_ref (AVFilterLink *inlink, AVFrame *inpicref)
static int	request_frame (AVFilterLink *outlink)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	psnr_options []
static const AVFilterPad	psnr_inputs []
static const AVFilterPad	psnr_outputs []
AVFilter	avfilter_vf_psnr

Detailed Description

Caculate the PSNR between two input videos.

Definition in file vf_psnr.c.

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(PSNRContext, x)

Definition at line 51 of file vf_psnr.c.

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 52 of file vf_psnr.c.

Function Documentation

AVFILTER_DEFINE_CLASS

(

psnr

)

static int pow2 ( int  base )

inlinestatic

Definition at line 62 of file vf_psnr.c.

Referenced by compute_images_mse(), and get_psnr().

static double get_psnr ( double  mse, uint64_t  nb_frames, int  max  )

inlinestatic

Definition at line 67 of file vf_psnr.c.

Referenced by do_psnr(), and uninit().

static void compute_images_mse ( const uint8_t *  main_data[4], const int  main_linesizes[4], const uint8_t *  ref_data[4], const int  ref_linesizes[4], int  w, int  h, const AVPixFmtDescriptor *  desc, double  mse[4]  )

inlinestatic

Definition at line 73 of file vf_psnr.c.

Referenced by do_psnr().

static void set_meta ( AVDictionary **  metadata, const char *  key, char  comp, float  d  )

static

Definition at line 101 of file vf_psnr.c.

Referenced by do_psnr().

static AVFrame* do_psnr ( AVFilterContext *  ctx, AVFrame *  main, const AVFrame *  ref  )

static

Definition at line 114 of file vf_psnr.c.

Referenced by init().

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 161 of file vf_psnr.c.

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 184 of file vf_psnr.c.

static int config_input_ref ( AVFilterLink *  inlink )

static

Definition at line 201 of file vf_psnr.c.

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 249 of file vf_psnr.c.

static int filter_frame_main ( AVFilterLink *  inlink, AVFrame *  inpicref  )

static

Definition at line 263 of file vf_psnr.c.

static int filter_frame_ref ( AVFilterLink *  inlink, AVFrame *  inpicref  )

static

Definition at line 269 of file vf_psnr.c.

static int request_frame ( AVFilterLink *  outlink )

static

Definition at line 275 of file vf_psnr.c.

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 281 of file vf_psnr.c.

Variable Documentation

const AVOption psnr_options[]

static

Initial value:

= {
    {"stats_file", "Set file where to store per-frame difference information", OFFSET(stats_file_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
    {"f",          "Set file where to store per-frame difference information", OFFSET(stats_file_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
    { NULL },
}

Definition at line 54 of file vf_psnr.c.

const AVFilterPad psnr_inputs[]

static

Initial value:

= {
    {
        .name             = "main",
        .type             = AVMEDIA_TYPE_VIDEO,
        .filter_frame     = filter_frame_main,
    },{
        .name             = "reference",
        .type             = AVMEDIA_TYPE_VIDEO,
        .filter_frame     = filter_frame_ref,
        .config_props     = config_input_ref,
    },
    { NULL }
}

Definition at line 298 of file vf_psnr.c.

const AVFilterPad psnr_outputs[]

static

Initial value:

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

Definition at line 312 of file vf_psnr.c.

AVFilter avfilter_vf_psnr

Initial value:

= {
    .name           = "psnr",
    .description    = NULL_IF_CONFIG_SMALL("Calculate the PSNR between two video streams."),
    .init           = init,
    .uninit         = uninit,
    .query_formats  = query_formats,
    .priv_size      = sizeof(PSNRContext),
    .priv_class     = &psnr_class,
    .inputs         = psnr_inputs,
    .outputs        = psnr_outputs,
}

Definition at line 322 of file vf_psnr.c.