vf_qp.c File Reference

#include <math.h>
#include "libavutil/eval.h"
#include "libavutil/opt.h"
#include "libavutil/video_enc_params.h"
#include "avfilter.h"
#include "filters.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	QPContext

Macros
#define	OFFSET(x)   offsetof(QPContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define	BLOCK_QP_DELTA(block_idx)   (par_in ? av_video_enc_params_block(par_in, block_idx)->delta_qp : 0)

Functions
	AVFILTER_DEFINE_CLASS (qp)
static int	config_input (AVFilterLink *inlink)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)

Variables
static const char *const	var_names [] = { "known", "qp", "x", "y", "w", "h", NULL }
static const AVOption	qp_options []
static const AVFilterPad	qp_inputs []
const AVFilter	ff_vf_qp

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(QPContext, x)

Definition at line 40 of file vf_qp.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 41 of file vf_qp.c.

BLOCK_QP_DELTA

#define BLOCK_QP_DELTA

(

block_idx

)

(par_in ? av_video_enc_params_block(par_in, block_idx)->delta_qp : 0)

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

qp

)

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 50 of file vf_qp.c.

filter_frame()

static int filter_frame ( AVFilterLink *  inlink, AVFrame *  in  )

static

Definition at line 87 of file vf_qp.c.

Variable Documentation

var_names

const char* const var_names[] = { "known", "qp", "x", "y", "w", "h", NULL }

static

Definition at line 38 of file vf_qp.c.

Referenced by config_input(), and filter_frame().

qp_options

const AVOption qp_options[]

static

Initial value:

= {
    { "qp", "set qp expression", OFFSET(qp_expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
    { NULL }
}

Definition at line 43 of file vf_qp.c.

qp_inputs

const AVFilterPad qp_inputs[]

static

Initial value:

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

Definition at line 175 of file vf_qp.c.

ff_vf_qp

const AVFilter ff_vf_qp

Initial value:

= {
    .name          = "qp",
    .description   = NULL_IF_CONFIG_SMALL("Change video quantization parameters."),
    .priv_size     = sizeof(QPContext),
    FILTER_INPUTS(qp_inputs),
    FILTER_OUTPUTS(ff_video_default_filterpad),
    .priv_class    = &qp_class,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
                     AVFILTER_FLAG_METADATA_ONLY,
}

Definition at line 184 of file vf_qp.c.