vf_spp.c File Reference

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 "vf_spp.h"

Macros
#define	OFFSET(x)   offsetof(SPPContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define	STORE(pos)
#define	STORE16(pos)

Enumerations
enum	mode {   FF_EBUR128_MODE_M = (1 << 0), FF_EBUR128_MODE_S = (1 << 1) | FF_EBUR128_MODE_M, FF_EBUR128_MODE_I = (1 << 2) | FF_EBUR128_MODE_M, FF_EBUR128_MODE_LRA = (1 << 3) | FF_EBUR128_MODE_S,   FF_EBUR128_MODE_SAMPLE_PEAK = (1 << 4) | FF_EBUR128_MODE_M, MODE_NONE, MODE_RO, MODE_RW,   MODE_TOGGLE, MODE_RANDOM, NB_MODES, MODE_COVER,   MODE_BLUR, NB_MODES, MODE_HARD, MODE_SOFT,   MODE_MEDIUM, MODE_HARD, MODE_SOFT, NB_MODES }

Functions
	DECLARE_ALIGNED (8, static const uint8_t, ldither)[8][8]

Variables
AVFilter	ff_vf_spp

Detailed Description

Simple post processing filter.

This implementation is based on an algorithm described in "Aria Nosratinia Embedded Post-Processing for Enhancement of Compressed Images (1999)"

Originally written by Michael Niedermayer for the MPlayer project, and ported by Clément Bœsch for FFmpeg.

Macro Definition Documentation

STORE

#define STORE

(

pos

)

Value:

do {                                                     \
    temp = ((src[x + y*src_linesize + pos] << log2_scale) + d[pos]) >> 6;   \
    if (temp & 0x100)                                                       \
        temp = ~(temp >> 31);                                               \
    dst[x + y*dst_linesize + pos] = temp;                                   \
} while (0)

STORE16

#define STORE16

(

pos

)

Value:

do {                                                   \
    temp = ((src[x + y*src_linesize + pos] << log2_scale) + (d[pos]>>1)) >> 5;   \
    if (temp & mask )                                                       \
        temp = ~(temp >> 31);                                               \
    dst[x + y*dst_linesize + pos] = temp;                                   \
} while (0)

Enumeration Type Documentation

mode

enum mode

Enumerator
FF_EBUR128_MODE_M	can call ff_ebur128_loudness_momentary
FF_EBUR128_MODE_S	can call ff_ebur128_loudness_shortterm
FF_EBUR128_MODE_I	can call ff_ebur128_loudness_global_* and ff_ebur128_relative_threshold
FF_EBUR128_MODE_LRA	can call ff_ebur128_loudness_range
FF_EBUR128_MODE_SAMPLE_PEAK	can call ff_ebur128_sample_peak

Variable Documentation

ff_vf_spp

AVFilter ff_vf_spp

Initial value:

= {
    .name            = "spp",
    .description     = NULL_IF_CONFIG_SMALL("Apply a simple post processing filter."),
    .priv_size       = sizeof(SPPContext),
    .init_dict       = init_dict,
    .uninit          = uninit,
    .query_formats   = query_formats,
    .inputs          = spp_inputs,
    .outputs         = spp_outputs,
    .process_command = process_command,
    .priv_class      = &spp_class,
    .flags           = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
}