FFmpeg: libavfilter/vf_hqx.c File Reference

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Data Structures | Macros | Typedefs | Functions | Variables

vf_hqx.c File Reference

hqx magnification filters (hq2x, hq3x, hq4x) More...

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

Go to the source code of this file.

Data Structures

struct HQXContext

struct ThreadData

Macros

#define OFFSET(x) offsetof(HQXContext, x)

#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

#define YMASK 0xff0000

#define UMASK 0x00ff00

#define VMASK 0x0000ff

#define P(m, r) ((k_shuffled & (m)) == (r))

#define DROP4(z) ((z) > 4 ? (z)-1 : (z))

#define SHF(x, rot, n) (((x) >> ((rot) ? 7-DROP4(n) : DROP4(n)) & 1) << DROP4(p##n))

#define WDIFF(c1, c2) yuv_diff(rgb2yuv(r2y, c1), rgb2yuv(r2y, c2))

#define INTERP_BOOTSTRAP(rot)

#define HQX_FUNC(size)

Typedefs

typedef int(* hqxfunc_t )(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)

Functions

AVFILTER_DEFINE_CLASS (hqx)

static av_always_inline uint32_t rgb2yuv (const uint32_t *r2y, uint32_t c)

static av_always_inline int yuv_diff (uint32_t yuv1, uint32_t yuv2)

static av_always_inline uint32_t interp_2px (uint32_t c1, int w1, uint32_t c2, int w2, int s)

static av_always_inline uint32_t interp_3px (uint32_t c1, int w1, uint32_t c2, int w2, uint32_t c3, int w3, int s)

static av_always_inline uint32_t hq2x_interp_1x1 (const uint32_t *r2y, int k, const uint32_t *w, int p0, int p1, int p2, int p3, int p4, int p5, int p6, int p7, int p8)

static av_always_inline void hq3x_interp_2x1 (uint32_t *dst, int dst_linesize, const uint32_t *r2y, int k, const uint32_t *w, int pos00, int pos01, int p0, int p1, int p2, int p3, int p4, int p5, int p6, int p7, int p8, int rotate)

static av_always_inline void hq4x_interp_2x2 (uint32_t *dst, int dst_linesize, const uint32_t *r2y, int k, const uint32_t *w, int pos00, int pos01, int pos10, int pos11, int p0, int p1, int p2, int p3, int p4, int p5, int p6, int p7, int p8)

static av_always_inline void hqx_filter (const ThreadData *td, int jobnr, int nb_jobs, int n)

static int query_formats (AVFilterContext *ctx)

static int config_output (AVFilterLink *outlink)

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

static av_cold int init (AVFilterContext *ctx)

Variables

static const AVOption hqx_options []

static const AVFilterPad hqx_inputs []

static const AVFilterPad hqx_outputs []

AVFilter ff_vf_hqx

Detailed Description

hqx magnification filters (hq2x, hq3x, hq4x)

Originally designed by Maxim Stephin.

See Also: http://en.wikipedia.org/wiki/Hqx; http://web.archive.org/web/20131114143602/http://www.hiend3d.com/hq3x.html; http://blog.pkh.me/p/19-butchering-hqx-scaling-filters.html

Definition in file vf_hqx.c.

Macro Definition Documentation

#define OFFSET ( x ) offsetof(HQXContext, x)

Definition at line 49 of file vf_hqx.c.

#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 50 of file vf_hqx.c.

#define YMASK 0xff0000

Referenced by pixel_diff(), and yuv_diff().

#define UMASK 0x00ff00

Referenced by pixel_diff(), and yuv_diff().

#define VMASK 0x0000ff

Referenced by pixel_diff(), and yuv_diff().

#define P ( m,

) ((k_shuffled & (m)) == (r))

Definition at line 90 of file vf_hqx.c.

Referenced by hq2x_interp_1x1(), hq3x_interp_2x1(), and hq4x_interp_2x2().

#define DROP4 ( z ) ((z) > 4 ? (z)-1 : (z))

Definition at line 94 of file vf_hqx.c.

#define SHF ( x,

rot,

) (((x) >> ((rot) ? 7-DROP4(n) : DROP4(n)) & 1) << DROP4(p##n))

Definition at line 97 of file vf_hqx.c.

#define WDIFF ( c1,

) yuv_diff(rgb2yuv(r2y, c1), rgb2yuv(r2y, c2))

Definition at line 100 of file vf_hqx.c.

Referenced by hq2x_interp_1x1(), hq3x_interp_2x1(), and hq4x_interp_2x2().

#define INTERP_BOOTSTRAP ( rot )

Value:

const int k_shuffled = SHF(k,rot,0) | SHF(k,rot,1) | SHF(k,rot,2) \

| SHF(k,rot,3) | 0 | SHF(k,rot,5) \

| SHF(k,rot,6) | SHF(k,rot,7) | SHF(k,rot,8); \

const uint32_t w0 = w[p0], w1 = w[p1], \

w3 = w[p3], w4 = w[p4], w5 = w[p5], \

w7 = w[p7]

Definition at line 105 of file vf_hqx.c.

Referenced by hq2x_interp_1x1(), hq3x_interp_2x1(), and hq4x_interp_2x2().

#define HQX_FUNC ( size )

Value:

static int hq##size##x(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \

{ \

hqx_filter(arg, jobnr, nb_jobs, size); \

return 0; \

}

Definition at line 451 of file vf_hqx.c.

Typedef Documentation

typedef int(* hqxfunc_t)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)

Definition at line 35 of file vf_hqx.c.

Function Documentation

AVFILTER_DEFINE_CLASS ( hqx )

static av_always_inline uint32_t rgb2yuv ( const uint32_t * r2y,

uint32_t c

)

static

Definition at line 58 of file vf_hqx.c.

Referenced by bayer_to_yv12_wrapper(), hqx_filter(), yv12_copy(), and yv12_interpolate().

static av_always_inline int yuv_diff ( uint32_t yuv1,

uint32_t yuv2

)

static

Definition at line 63 of file vf_hqx.c.

Referenced by hqx_filter().

static av_always_inline uint32_t interp_2px ( uint32_t c1,

int w1,

uint32_t c2,

int w2,

int s

)

static

Definition at line 74 of file vf_hqx.c.

Referenced by hq2x_interp_1x1(), hq3x_interp_2x1(), and hq4x_interp_2x2().

static av_always_inline uint32_t interp_3px ( uint32_t c1,

int w1,

uint32_t c2,

int w2,

uint32_t c3,

int w3,

int s

)

static

Definition at line 81 of file vf_hqx.c.

Referenced by hq2x_interp_1x1(), hq3x_interp_2x1(), and hq4x_interp_2x2().

static av_always_inline uint32_t hq2x_interp_1x1 ( const uint32_t * r2y,

int k,

const uint32_t * w,

int p0,

int p1,

int p2,

int p3,

int p4,

int p5,

int p6,

int p7,

int p8

)

static

Definition at line 117 of file vf_hqx.c.

Referenced by hqx_filter().

static av_always_inline void hq3x_interp_2x1 ( uint32_t * dst,

int dst_linesize,

const uint32_t * r2y,

int k,

const uint32_t * w,

int pos00,

int pos01,

int p0,

int p1,

int p2,

int p3,

int p4,

int p5,

int p6,

int p7,

int p8,

int rotate

)

static

Definition at line 167 of file vf_hqx.c.

Referenced by hqx_filter().

static av_always_inline void hq4x_interp_2x2 ( uint32_t * dst,

int dst_linesize,

const uint32_t * r2y,

int k,

const uint32_t * w,

int pos00,

int pos01,

int pos10,

int pos11,

int p0,

int p1,

int p2,

int p3,

int p4,

int p5,

int p6,

int p7,

int p8

)

static

Definition at line 233 of file vf_hqx.c.

Referenced by hqx_filter().

static av_always_inline void hqx_filter ( const ThreadData * td,

int jobnr,

int nb_jobs,

int n

)

static

Definition at line 381 of file vf_hqx.c.

static int query_formats ( AVFilterContext * ctx )

static

Definition at line 462 of file vf_hqx.c.

static int config_output ( AVFilterLink * outlink )

static

Definition at line 469 of file vf_hqx.c.

static int filter_frame ( AVFilterLink * inlink,

AVFrame * in

)

static

Definition at line 483 of file vf_hqx.c.

static av_cold int init ( AVFilterContext * ctx )

static

Definition at line 507 of file vf_hqx.c.

Variable Documentation

const AVOption hqx_options[]

static

Initial value:

= {

{ "n", "set scale factor", OFFSET(n), AV_OPT_TYPE_INT, {.i64 = 3}, 2, 4, .flags = FLAGS },

{ NULL }

}

Definition at line 51 of file vf_hqx.c.

const AVFilterPad hqx_inputs[]

static

Initial value:

= {

{

.name = "default",

.type = AVMEDIA_TYPE_VIDEO,

.filter_frame = filter_frame,

{ NULL }

}

Definition at line 534 of file vf_hqx.c.

const AVFilterPad hqx_outputs[]

static

Initial value:

= {

{

.name = "default",

.type = AVMEDIA_TYPE_VIDEO,

.config_props = config_output,

{ NULL }

}

Definition at line 543 of file vf_hqx.c.

AVFilter ff_vf_hqx

Initial value:

= {

.name = "hqx",

.description = NULL_IF_CONFIG_SMALL("Scale the input by 2, 3 or 4 using the hq*x magnification algorithm."),

.priv_size = sizeof(HQXContext),

.init = init,

.query_formats = query_formats,

.inputs = hqx_inputs,

.outputs = hqx_outputs,

.priv_class = &hqx_class,

.flags = AVFILTER_FLAG_SLICE_THREADS,

}

Definition at line 552 of file vf_hqx.c.

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