vf_uspp.c File Reference

Ultra Slow/Simple Post-processing filter. More...

#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "internal.h"
#include "avfilter.h"

Go to the source code of this file.

Data Structures
struct	USPPContext

Macros
#define	MAX_LEVEL   8 /* quality levels */
#define	BLOCK   16
#define	OFFSET(x)   offsetof(USPPContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define	STORE(pos)

Functions
	AVFILTER_DEFINE_CLASS (uspp)
static void	store_slice_c (uint8_t *dst, const uint16_t *src, int dst_stride, int src_stride, int width, int height, int log2_scale)
static void	filter (USPPContext *p, uint8_t *dst[3], uint8_t *src[3], int dst_stride[3], int src_stride[3], int width, int height, uint8_t *qp_store, int qp_stride)
static int	query_formats (AVFilterContext *ctx)
static int	config_input (AVFilterLink *inlink)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	uspp_options []
static const uint8_t	dither [8][8]
static const uint8_t	offset [511][2]
static const AVFilterPad	uspp_inputs []
static const AVFilterPad	uspp_outputs []
AVFilter	ff_vf_uspp

Detailed Description

Ultra Slow/Simple Post-processing filter.

Originally written by Michael Niedermayer for the MPlayer project, and ported by Arwa Arif for FFmpeg.

Definition in file vf_uspp.c.

Macro Definition Documentation

#define MAX_LEVEL   8 /* quality levels */

Definition at line 37 of file vf_uspp.c.

#define BLOCK   16

Definition at line 38 of file vf_uspp.c.

Referenced by config_input(), and filter().

#define OFFSET

(

x

)

offsetof(USPPContext, x)

Definition at line 59 of file vf_uspp.c.

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 60 of file vf_uspp.c.

#define STORE

(

pos

)

Value:

do {                                                     \
    temp = ((src[x + y * src_stride + pos] << log2_scale) + d[pos]) >> 8;   \
    if (temp & 0x100) temp = ~(temp >> 31);                                 \
    dst[x + y * dst_stride + pos] = temp;                                   \
} while (0)

Referenced by store_slice_c().

Function Documentation

AVFILTER_DEFINE_CLASS

(

uspp

)

static void store_slice_c ( uint8_t *  dst, const uint16_t *  src, int  dst_stride, int  src_stride, int  width, int  height, int  log2_scale  )

static

Definition at line 155 of file vf_uspp.c.

Referenced by filter().

static void filter ( USPPContext *  p, uint8_t *  dst[3], uint8_t *  src[3], int  dst_stride[3], int  src_stride[3], int  width, int  height, uint8_t *  qp_store, int  qp_stride  )

static

Definition at line 183 of file vf_uspp.c.

Referenced by filter_frame().

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 285 of file vf_uspp.c.

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 303 of file vf_uspp.c.

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

static

Definition at line 374 of file vf_uspp.c.

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 455 of file vf_uspp.c.

Variable Documentation

const AVOption uspp_options[]

static

Initial value:

= {
    { "quality",       "set quality",                          OFFSET(log2_count),    AV_OPT_TYPE_INT, {.i64 = 3}, 0, MAX_LEVEL, FLAGS },
    { "qp",            "force a constant quantizer parameter", OFFSET(qp),            AV_OPT_TYPE_INT, {.i64 = 0}, 0, 63,        FLAGS },
    { "use_bframe_qp", "use B-frames' QP",                     OFFSET(use_bframe_qp), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1,         FLAGS },
    { NULL }
}

Definition at line 61 of file vf_uspp.c.

const uint8_t dither[8][8]

static

Initial value:

= {
    {  0*4,  48*4,  12*4,  60*4,   3*4,  51*4,  15*4,  63*4, },
    { 32*4,  16*4,  44*4,  28*4,  35*4,  19*4,  47*4,  31*4, },
    {  8*4,  56*4,   4*4,  52*4,  11*4,  59*4,   7*4,  55*4, },
    { 40*4,  24*4,  36*4,  20*4,  43*4,  27*4,  39*4,  23*4, },
    {  2*4,  50*4,  14*4,  62*4,   1*4,  49*4,  13*4,  61*4, },
    { 34*4,  18*4,  46*4,  30*4,  33*4,  17*4,  45*4,  29*4, },
    { 10*4,  58*4,   6*4,  54*4,   9*4,  57*4,   5*4,  53*4, },
    { 42*4,  26*4,  38*4,  22*4,  41*4,  25*4,  37*4,  21*4, },
}

Definition at line 70 of file vf_uspp.c.

Referenced by store_slice_c().

const uint8_t offset[511][2]

static

Definition at line 81 of file vf_uspp.c.

Referenced by filter().

const AVFilterPad uspp_inputs[]

static

Initial value:

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

Definition at line 475 of file vf_uspp.c.

const AVFilterPad uspp_outputs[]

static

Initial value:

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

Definition at line 485 of file vf_uspp.c.

AVFilter ff_vf_uspp

Initial value:

= {
    .name            = "uspp",
    .description     = NULL_IF_CONFIG_SMALL("Apply Ultra Simple / Slow Post-processing filter."),
    .priv_size       = sizeof(USPPContext),
    .uninit          = uninit,
    .query_formats   = query_formats,
    .inputs          = uspp_inputs,
    .outputs         = uspp_outputs,
    .priv_class      = &uspp_class,
    .flags           = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
}

Definition at line 493 of file vf_uspp.c.