FFmpeg
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
 Used for passing data between threads. More...
 

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 ABSDIFF(a, b)   (abs((int)(a)-(int)(b)))
 
#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.

Definition at line 50 of file vf_hqx.c.

#define YMASK   0xff0000

Referenced by yuv_diff().

#define UMASK   0x00ff00

Referenced by yuv_diff().

#define VMASK   0x0000ff

Referenced by yuv_diff().

#define ABSDIFF (   a,
  b 
)    (abs((int)(a)-(int)(b)))

Referenced by yuv_diff().

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

Definition at line 92 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 96 of file vf_hqx.c.

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

Definition at line 99 of file vf_hqx.c.

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

Definition at line 102 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]
#define SHF(x, rot, n)
Definition: vf_hqx.c:99
uint8_t w
Definition: llviddspenc.c:38

Definition at line 107 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; \
}
ptrdiff_t size
Definition: opengl_enc.c:100
const char * arg
Definition: jacosubdec.c:66
static av_always_inline void hqx_filter(const ThreadData *td, int jobnr, int nb_jobs, int n)
Definition: vf_hqx.c:383
AVFormatContext * ctx
Definition: movenc.c:48
An instance of a filter.
Definition: avfilter.h:338
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a it should return

Definition at line 453 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 hqx_filter().

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 76 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 83 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 119 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 169 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 235 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 383 of file vf_hqx.c.

static int query_formats ( AVFilterContext ctx)
static

Definition at line 464 of file vf_hqx.c.

static int config_output ( AVFilterLink outlink)
static

Definition at line 473 of file vf_hqx.c.

static int filter_frame ( AVFilterLink inlink,
AVFrame in 
)
static

Definition at line 487 of file vf_hqx.c.

static av_cold int init ( AVFilterContext ctx)
static

Definition at line 511 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 }
}
#define NULL
Definition: coverity.c:32
int n
Definition: avisynth_c.h:760
#define OFFSET(x)
Definition: vf_hqx.c:49
#define FLAGS
Definition: vf_hqx.c:50

Definition at line 51 of file vf_hqx.c.

const AVFilterPad hqx_inputs[]
static
Initial value:
= {
{
.name = "default",
.filter_frame = filter_frame,
},
{ NULL }
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_hqx.c:487
#define NULL
Definition: coverity.c:32

Definition at line 538 of file vf_hqx.c.

const AVFilterPad hqx_outputs[]
static
Initial value:
= {
{
.name = "default",
.config_props = config_output,
},
{ NULL }
}
#define NULL
Definition: coverity.c:32
static int config_output(AVFilterLink *outlink)
Definition: vf_hqx.c:473

Definition at line 547 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,
.priv_class = &hqx_class,
}
static av_cold int init(AVFilterContext *ctx)
Definition: vf_hqx.c:511
static int query_formats(AVFilterContext *ctx)
Definition: vf_hqx.c:464
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:116
Definition: hqx.h:62
static const AVFilterPad hqx_outputs[]
Definition: vf_hqx.c:547
static const AVFilterPad hqx_inputs[]
Definition: vf_hqx.c:538
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
#define flags(name, subs,...)
Definition: cbs_av1.c:561

Definition at line 556 of file vf_hqx.c.