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gstreamer/subprojects/gst-plugins-good/gst/deinterlace/tvtime/greedy.c
Stijn Last 4bda59f88d deinterlace: greedy, improve quality 
scanlines->m1 = same line of the previous field
scanlines->t0 = line above of the current field
scanlines->b0 = line below of the current field
scanlines->mp = same line of the next field

Deinterlacing a field weaved frame:
When deinterlacing the top field, the next bottom field is available
(part of the same frame). but when deinterlacing the bottom field,
the next top field (part of the next frame) is not available and
scanlines->mp equals NULL.

In this case it's better to use greedy algorithm using the prevous field
(twice) rather then linear interpolation of the current field.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5331>
2023-09-25 06:40:47 +00:00

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/*
*
* GStreamer
* Copyright (c) 2000 Tom Barry All rights reserved.
* mmx.h port copyright (c) 2002 Billy Biggs <vektor@dumbterm.net>.
*
* Copyright (C) 2008,2010 Sebastian Dröge <slomo@collabora.co.uk>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/*
* Relicensed for GStreamer from GPL to LGPL with permit from Tom Barry
* and Billy Biggs.
* See: http://bugzilla.gnome.org/show_bug.cgi?id=163578
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "gstdeinterlacemethod.h"
#include <string.h>
#include "tvtime.h"
#define GST_TYPE_DEINTERLACE_METHOD_GREEDY_L (gst_deinterlace_method_greedy_l_get_type ())
#define GST_IS_DEINTERLACE_METHOD_GREEDY_L(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_DEINTERLACE_METHOD_GREEDY_L))
#define GST_IS_DEINTERLACE_METHOD_GREEDY_L_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_DEINTERLACE_METHOD_GREEDY_L))
#define GST_DEINTERLACE_METHOD_GREEDY_L_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_DEINTERLACE_METHOD_GREEDY_L, GstDeinterlaceMethodGreedyLClass))
#define GST_DEINTERLACE_METHOD_GREEDY_L(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_DEINTERLACE_METHOD_GREEDY_L, GstDeinterlaceMethodGreedyL))
#define GST_DEINTERLACE_METHOD_GREEDY_L_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_DEINTERLACE_METHOD_GREEDY_L, GstDeinterlaceMethodGreedyLClass))
#define GST_DEINTERLACE_METHOD_GREEDY_L_CAST(obj) ((GstDeinterlaceMethodGreedyL*)(obj))
GType gst_deinterlace_method_greedy_l_get_type (void);
typedef struct
{
GstDeinterlaceSimpleMethod parent;
guint max_comb;
} GstDeinterlaceMethodGreedyL;
typedef GstDeinterlaceSimpleMethodClass GstDeinterlaceMethodGreedyLClass;
// This is a simple lightweight DeInterlace method that uses little CPU time
// but gives very good results for low or intermedite motion.
// It defers frames by one field, but that does not seem to produce noticeable
// lip sync problems.
//
// The method used is to take either the older or newer weave pixel depending
// upon which give the smaller comb factor, and then clip to avoid large damage
// when wrong.
//
// I'd intended this to be part of a larger more elaborate method added to
// Blended Clip but this give too good results for the CPU to ignore here.
static inline void
deinterlace_greedy_interpolate_scanline_orc (GstDeinterlaceSimpleMethod * self,
guint8 * out, const GstDeinterlaceScanlineData * scanlines, guint size)
{
guint max_comb = GST_DEINTERLACE_METHOD_GREEDY_L (self)->max_comb;
if (scanlines->m1 == NULL) {
deinterlace_line_linear (out, scanlines->t0, scanlines->b0, size);
} else {
deinterlace_line_greedy (out, scanlines->m1, scanlines->t0, scanlines->b0,
scanlines->mp ? scanlines->mp : scanlines->m1, max_comb, size);
}
}
static inline void
deinterlace_greedy_interpolate_scanline_orc_planar_u (GstDeinterlaceSimpleMethod
* self, guint8 * out, const GstDeinterlaceScanlineData * scanlines, guint
size)
{
guint max_comb = GST_DEINTERLACE_METHOD_GREEDY_L (self)->max_comb;
if (scanlines->m1 == NULL) {
deinterlace_line_linear (out, scanlines->t0, scanlines->b0, size);
} else {
deinterlace_line_greedy (out, scanlines->m1, scanlines->t0, scanlines->b0,
scanlines->mp ? scanlines->mp : scanlines->m1, max_comb, size);
}
}
static inline void
deinterlace_greedy_interpolate_scanline_orc_planar_v (GstDeinterlaceSimpleMethod
* self, guint8 * out, const GstDeinterlaceScanlineData * scanlines, guint
size)
{
guint max_comb = GST_DEINTERLACE_METHOD_GREEDY_L (self)->max_comb;
if (scanlines->m1 == NULL) {
deinterlace_line_linear (out, scanlines->t0, scanlines->b0, size);
} else {
deinterlace_line_greedy (out, scanlines->m1, scanlines->t0, scanlines->b0,
scanlines->mp ? scanlines->mp : scanlines->m1, max_comb, size);
}
}
static void
deinterlace_greedy_copy_scanline (GstDeinterlaceSimpleMethod * self,
guint8 * out, const GstDeinterlaceScanlineData * scanlines, guint size)
{
memcpy (out, scanlines->m0, size);
}
static void
deinterlace_greedy_copy_scanline_planar_u (GstDeinterlaceSimpleMethod * self,
guint8 * out, const GstDeinterlaceScanlineData * scanlines, guint size)
{
memcpy (out, scanlines->m0, size);
}
static void
deinterlace_greedy_copy_scanline_planar_v (GstDeinterlaceSimpleMethod * self,
guint8 * out, const GstDeinterlaceScanlineData * scanlines, guint size)
{
memcpy (out, scanlines->m0, size);
}
G_DEFINE_TYPE (GstDeinterlaceMethodGreedyL, gst_deinterlace_method_greedy_l,
GST_TYPE_DEINTERLACE_SIMPLE_METHOD);
enum
{
PROP_0,
PROP_MAX_COMB
};
static void
gst_deinterlace_method_greedy_l_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstDeinterlaceMethodGreedyL *self = GST_DEINTERLACE_METHOD_GREEDY_L (object);
switch (prop_id) {
case PROP_MAX_COMB:
self->max_comb = g_value_get_uint (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
gst_deinterlace_method_greedy_l_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstDeinterlaceMethodGreedyL *self = GST_DEINTERLACE_METHOD_GREEDY_L (object);
switch (prop_id) {
case PROP_MAX_COMB:
g_value_set_uint (value, self->max_comb);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
gst_deinterlace_method_greedy_l_class_init (GstDeinterlaceMethodGreedyLClass *
klass)
{
GstDeinterlaceMethodClass *dim_class = (GstDeinterlaceMethodClass *) klass;
GstDeinterlaceSimpleMethodClass *dism_class =
(GstDeinterlaceSimpleMethodClass *) klass;
GObjectClass *gobject_class = (GObjectClass *) klass;
gobject_class->set_property = gst_deinterlace_method_greedy_l_set_property;
gobject_class->get_property = gst_deinterlace_method_greedy_l_get_property;
g_object_class_install_property (gobject_class, PROP_MAX_COMB,
g_param_spec_uint ("max-comb",
"Max comb",
"Max Comb", 0, 255, 15, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)
);
dim_class->fields_required = 2;
dim_class->name = "Motion Adaptive: Simple Detection";
dim_class->nick = "greedyl";
dim_class->latency = 1;
dism_class->interpolate_scanline_ayuv =
deinterlace_greedy_interpolate_scanline_orc;
dism_class->interpolate_scanline_yuy2 =
deinterlace_greedy_interpolate_scanline_orc;
dism_class->interpolate_scanline_yvyu =
deinterlace_greedy_interpolate_scanline_orc;
dism_class->interpolate_scanline_uyvy =
deinterlace_greedy_interpolate_scanline_orc;
dism_class->interpolate_scanline_nv12 =
deinterlace_greedy_interpolate_scanline_orc;
dism_class->interpolate_scanline_nv21 =
deinterlace_greedy_interpolate_scanline_orc;
dism_class->interpolate_scanline_argb =
deinterlace_greedy_interpolate_scanline_orc;
dism_class->interpolate_scanline_abgr =
deinterlace_greedy_interpolate_scanline_orc;
dism_class->interpolate_scanline_rgba =
deinterlace_greedy_interpolate_scanline_orc;
dism_class->interpolate_scanline_bgra =
deinterlace_greedy_interpolate_scanline_orc;
dism_class->interpolate_scanline_rgb =
deinterlace_greedy_interpolate_scanline_orc;
dism_class->interpolate_scanline_bgr =
deinterlace_greedy_interpolate_scanline_orc;
dism_class->interpolate_scanline_planar_y =
deinterlace_greedy_interpolate_scanline_orc;
dism_class->interpolate_scanline_planar_u =
deinterlace_greedy_interpolate_scanline_orc_planar_u;
dism_class->interpolate_scanline_planar_v =
deinterlace_greedy_interpolate_scanline_orc_planar_v;
dism_class->copy_scanline_ayuv = deinterlace_greedy_copy_scanline;
dism_class->copy_scanline_yuy2 = deinterlace_greedy_copy_scanline;
dism_class->copy_scanline_yvyu = deinterlace_greedy_copy_scanline;
dism_class->copy_scanline_uyvy = deinterlace_greedy_copy_scanline;
dism_class->copy_scanline_argb = deinterlace_greedy_copy_scanline;
dism_class->copy_scanline_abgr = deinterlace_greedy_copy_scanline;
dism_class->copy_scanline_rgba = deinterlace_greedy_copy_scanline;
dism_class->copy_scanline_bgra = deinterlace_greedy_copy_scanline;
dism_class->copy_scanline_rgb = deinterlace_greedy_copy_scanline;
dism_class->copy_scanline_bgr = deinterlace_greedy_copy_scanline;
dism_class->copy_scanline_planar_y = deinterlace_greedy_copy_scanline;
dism_class->copy_scanline_planar_u =
deinterlace_greedy_copy_scanline_planar_u;
dism_class->copy_scanline_planar_v =
deinterlace_greedy_copy_scanline_planar_v;
}
static void
gst_deinterlace_method_greedy_l_init (GstDeinterlaceMethodGreedyL * self)
{
self->max_comb = 15;
}
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