vf_framerate.c File Reference

#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"
#include "filters.h"
#include "framerate.h"
#include "scene_sad.h"

Go to the source code of this file.

Data Structures
struct	ThreadData
	Used for passing data between threads. More...

Macros
#define	DEBUG
#define	OFFSET(x)   offsetof(FrameRateContext, x)
#define	V   AV_OPT_FLAG_VIDEO_PARAM
#define	F   AV_OPT_FLAG_FILTERING_PARAM
#define	FRAMERATE_FLAG_SCD   01
#define	BLEND_FRAME_FUNC(nbits)

Functions
	AVFILTER_DEFINE_CLASS (framerate)
static double	get_scene_score (AVFilterContext *ctx, AVFrame *crnt, AVFrame *next)
static int	filter_slice (AVFilterContext *ctx, void *arg, int job, int nb_jobs)
static int	blend_frames (AVFilterContext *ctx, int interpolate)
static int	process_work_frame (AVFilterContext *ctx)
static av_cold int	init (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
void	ff_framerate_init (FrameRateContext *s)
static int	config_input (AVFilterLink *inlink)
static int	activate (AVFilterContext *ctx)
static int	config_output (AVFilterLink *outlink)

Variables
static const AVOption	framerate_options []
static const AVFilterPad	framerate_inputs []
static const AVFilterPad	framerate_outputs []
AVFilter	ff_vf_framerate

Detailed Description

filter for upsampling or downsampling a progressive source

Definition in file vf_framerate.c.

Macro Definition Documentation

DEBUG

#define DEBUG

Definition at line 29 of file vf_framerate.c.

OFFSET

#define OFFSET

(

x

)

offsetof(FrameRateContext, x)

Definition at line 44 of file vf_framerate.c.

V

#define V   AV_OPT_FLAG_VIDEO_PARAM

Definition at line 45 of file vf_framerate.c.

F

#define F   AV_OPT_FLAG_FILTERING_PARAM

Definition at line 46 of file vf_framerate.c.

FRAMERATE_FLAG_SCD

#define FRAMERATE_FLAG_SCD   01

Definition at line 47 of file vf_framerate.c.

BLEND_FRAME_FUNC

#define BLEND_FRAME_FUNC

(

nbits

)

Value:

static void blend_frames##nbits##_c(BLEND_FUNC_PARAMS)  \
{                                                       \
    int line, pixel;                                    \
    uint##nbits##_t *dstw  = (uint##nbits##_t *)dst;    \
    uint##nbits##_t *src1w = (uint##nbits##_t *)src1;   \
    uint##nbits##_t *src2w = (uint##nbits##_t *)src2;   \
    int bytes = nbits / 8;                              \
    width /= bytes;                                     \
    src1_linesize /= bytes;                             \
    src2_linesize /= bytes;                             \
    dst_linesize /= bytes;                              \
    for (line = 0; line < height; line++) {             \
        for (pixel = 0; pixel < width; pixel++)         \
            dstw[pixel] = ((src1w[pixel] * factor1) +   \
                    (src2w[pixel] * factor2) + half)    \
                    >> BLEND_FACTOR_DEPTH(nbits);       \
        src1w += src1_linesize;                         \
        src2w += src2_linesize;                         \
        dstw  += dst_linesize;                          \
    }                                                   \
}

Definition at line 240 of file vf_framerate.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

framerate

)

get_scene_score()

static double get_scene_score ( AVFilterContext *  ctx, AVFrame *  crnt, AVFrame *  next  )

static

Definition at line 65 of file vf_framerate.c.

Referenced by blend_frames().

filter_slice()

static int filter_slice ( AVFilterContext *  ctx, void *  arg, int  job, int  nb_jobs  )

static

Definition at line 94 of file vf_framerate.c.

Referenced by blend_frames().

blend_frames()

static int blend_frames ( AVFilterContext *  ctx, int  interpolate  )

static

Definition at line 120 of file vf_framerate.c.

Referenced by process_work_frame().

process_work_frame()

static int process_work_frame ( AVFilterContext *  ctx )

static

Definition at line 155 of file vf_framerate.c.

Referenced by activate().

init()

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 205 of file vf_framerate.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 212 of file vf_framerate.c.

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 219 of file vf_framerate.c.

ff_framerate_init()

void ff_framerate_init

(

FrameRateContext *

s

)

Definition at line 265 of file vf_framerate.c.

Referenced by config_input().

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 278 of file vf_framerate.c.

activate()

static int activate ( AVFilterContext *  ctx )

static

Definition at line 304 of file vf_framerate.c.

config_output()

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 381 of file vf_framerate.c.

Variable Documentation

framerate_options

const AVOption framerate_options[]

static

Initial value:

= {
    {"fps",                 "required output frames per second rate", OFFSET(dest_frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="50"},             0,       INT_MAX, V|F },
 
    {"interp_start",        "point to start linear interpolation",    OFFSET(interp_start),    AV_OPT_TYPE_INT,      {.i64=15},                 0,       255,     V|F },
    {"interp_end",          "point to end linear interpolation",      OFFSET(interp_end),      AV_OPT_TYPE_INT,      {.i64=240},                0,       255,     V|F },
    {"scene",               "scene change level",                     OFFSET(scene_score),     AV_OPT_TYPE_DOUBLE,   {.dbl=8.2},                0,       100., V|F },
 
    {"flags",               "set flags",                              OFFSET(flags),           AV_OPT_TYPE_FLAGS,    {.i64=1},                  0,       INT_MAX, V|F, "flags" },
    {"scene_change_detect", "enable scene change detection",          0,                       AV_OPT_TYPE_CONST,    {.i64=FRAMERATE_FLAG_SCD}, INT_MIN, INT_MAX, V|F, "flags" },
    {"scd",                 "enable scene change detection",          0,                       AV_OPT_TYPE_CONST,    {.i64=FRAMERATE_FLAG_SCD}, INT_MIN, INT_MAX, V|F, "flags" },
 
    {NULL}
}

Definition at line 49 of file vf_framerate.c.

framerate_inputs

const AVFilterPad framerate_inputs[]

static

Initial value:

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

Definition at line 426 of file vf_framerate.c.

framerate_outputs

const AVFilterPad framerate_outputs[]

static

Initial value:

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

Definition at line 435 of file vf_framerate.c.

ff_vf_framerate

AVFilter ff_vf_framerate

Initial value:

= {
    .name          = "framerate",
    .description   = NULL_IF_CONFIG_SMALL("Upsamples or downsamples progressive source between specified frame rates."),
    .priv_size     = sizeof(FrameRateContext),
    .priv_class    = &framerate_class,
    .init          = init,
    .uninit        = uninit,
    .query_formats = query_formats,
    .inputs        = framerate_inputs,
    .outputs       = framerate_outputs,
    .flags         = AVFILTER_FLAG_SLICE_THREADS,
    .activate      = activate,
}

Definition at line 444 of file vf_framerate.c.