--- /dev/null
+/*
+ * GStreamer
+ * Copyright (C) 2019 Jan Schmidt <jan@centricular.com>
+ *
+ * Portions of this file extracted from libav
+ * Copyright (C) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <gst/gst.h>
+#ifdef HAVE_ORC
+#include <orc/orc.h>
+#endif
+#include "gstdeinterlacemethod.h"
+#include "yadif.h"
+
+#define GST_TYPE_DEINTERLACE_METHOD_YADIF (gst_deinterlace_method_yadif_get_type ())
+#define GST_IS_DEINTERLACE_METHOD_YADIF(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_DEINTERLACE_METHOD_YADIF))
+#define GST_IS_DEINTERLACE_METHOD_YADIF_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_DEINTERLACE_METHOD_YADIF))
+#define GST_DEINTERLACE_METHOD_YADIF_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_DEINTERLACE_METHOD_YADIF, GstDeinterlaceMethodYadifClass))
+#define GST_DEINTERLACE_METHOD_YADIF(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_DEINTERLACE_METHOD_YADIF, GstDeinterlaceMethodYadif))
+#define GST_DEINTERLACE_METHOD_YADIF_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_DEINTERLACE_METHOD_YADIF, GstDeinterlaceMethodYadifClass))
+#define GST_DEINTERLACE_METHOD_YADIF_CAST(obj) ((GstDeinterlaceMethodYadif*)(obj))
+
+typedef GstDeinterlaceSimpleMethod GstDeinterlaceMethodYadif;
+typedef GstDeinterlaceSimpleMethodClass GstDeinterlaceMethodYadifClass;
+
+G_DEFINE_TYPE (GstDeinterlaceMethodYadif,
+ gst_deinterlace_method_yadif, GST_TYPE_DEINTERLACE_SIMPLE_METHOD);
+
+static void
+filter_scanline_yadif (GstDeinterlaceSimpleMethod * self,
+ guint8 * out, const GstDeinterlaceScanlineData * scanlines, guint size);
+
+static void
+copy_scanline (GstDeinterlaceSimpleMethod * self, guint8 * out,
+ const GstDeinterlaceScanlineData * scanlines, guint size)
+{
+ memcpy (out, scanlines->m0, size);
+}
+
+static void
+ gst_deinterlace_method_yadif_class_init
+ (GstDeinterlaceMethodYadifClass * klass)
+{
+ GstDeinterlaceMethodClass *dim_class = (GstDeinterlaceMethodClass *) klass;
+ GstDeinterlaceSimpleMethodClass *dism_class =
+ (GstDeinterlaceSimpleMethodClass *) klass;
+
+ dim_class->name = "YADIF Adaptive Deinterlacer";
+ dim_class->nick = "yadif";
+ dim_class->fields_required = 5;
+ dim_class->latency = 2;
+
+ dism_class->copy_scanline_planar_y = copy_scanline;
+ dism_class->copy_scanline_planar_u = copy_scanline;
+ dism_class->copy_scanline_planar_v = copy_scanline;
+
+ dism_class->interpolate_scanline_planar_y = filter_scanline_yadif;
+ dism_class->interpolate_scanline_planar_u = filter_scanline_yadif;
+ dism_class->interpolate_scanline_planar_v = filter_scanline_yadif;
+}
+
+static void
+gst_deinterlace_method_yadif_init (GstDeinterlaceMethodYadif * self)
+{
+}
+
+#define FFABS(a) ABS(a)
+#define FFMIN(a,b) MIN(a,b)
+#define FFMAX(a,b) MAX(a,b)
+#define FFMAX3(a,b,c) FFMAX(FFMAX(a,b),c)
+#define FFMIN3(a,b,c) FFMIN(FFMIN(a,b),c)
+
+#define CHECK(j)\
+ { int score = FFABS(s->t0[x - 1 + (j)] - s->b0[x - 1 - (j)])\
+ + FFABS(s->t0[x +(j)] - s->b0[x -(j)])\
+ + FFABS(s->t0[x + 1 + (j)] - s->b0[x + 1 - (j)]);\
+ if (score < spatial_score) {\
+ spatial_score= score;\
+ spatial_pred= (s->t0[x +(j)] + s->b0[x -(j)])>>1;\
+
+/* The is_not_edge argument here controls when the code will enter a branch
+ * which reads up to and including x-3 and x+3. */
+
+#define FILTER(start, end, is_not_edge) \
+ for (x = start; x < end; x++) { \
+ int c = s->t0[x]; \
+ int d = (s->m1[x] + s->mp[x])>>1; \
+ int e = s->b0[x]; \
+ int temporal_diff0 = FFABS(s->m1[x] - s->mp[x]); \
+ int temporal_diff1 =(FFABS(s->t2[x] - c) + FFABS(s->b2[x] - e) )>>1; \
+ int temporal_diff2 =(FFABS(s->tp2[x] - c) + FFABS(s->bp2[x] - e) )>>1; \
+ int diff = FFMAX3(temporal_diff0 >> 1, temporal_diff1, temporal_diff2); \
+ int spatial_pred = (c+e) >> 1; \
+ \
+ if (is_not_edge) {\
+ int spatial_score = FFABS(s->t0[x-1] - s->b0[x-1]) + FFABS(c-e) \
+ + FFABS(s->t0[x+1] - s->b0[x+1]); \
+ CHECK(-1) CHECK(-2) }} }} \
+ CHECK( 1) CHECK( 2) }} }} \
+ }\
+ \
+ if (!(mode&2)) { \
+ int b = (s->tt1[x] + s->ttp[x])>>1; \
+ int f = (s->bb1[x] + s->bbp[x])>>1; \
+ int max = FFMAX3(d - e, d - c, FFMIN(b - c, f - e)); \
+ int min = FFMIN3(d - e, d - c, FFMAX(b - c, f - e)); \
+ \
+ diff = FFMAX3(diff, min, -max); \
+ } \
+ \
+ if (spatial_pred > d + diff) \
+ spatial_pred = d + diff; \
+ else if (spatial_pred < d - diff) \
+ spatial_pred = d - diff; \
+ \
+ dst[x] = spatial_pred; \
+ \
+ }
+
+static void
+filter_line_c (guint8 * dst,
+ const GstDeinterlaceScanlineData * s, int start, int end, int mode)
+{
+ int x;
+ /* The function is called for processing the middle
+ * pixels of each line, excluding 3 at each end.
+ * This allows the FILTER macro to be
+ * called so that it processes all the pixels normally. A constant value of
+ * true for is_not_edge lets the compiler ignore the if statement. */
+ FILTER (start, end, 1)
+}
+
+#define MAX_ALIGN 8
+static void
+filter_edges (guint8 * dst,
+ const GstDeinterlaceScanlineData * s, int w, int mode)
+{
+ int x;
+ const int edge = MAX_ALIGN - 1;
+
+ /* Only edge pixels need to be processed here. A constant value of false
+ * for is_not_edge should let the compiler ignore the whole branch. */
+ FILTER (0, 3, 0)
+ FILTER (w - edge, w - 3, 1)
+ FILTER (w - 3, w, 0)
+}
+
+static void
+filter_scanline_yadif (GstDeinterlaceSimpleMethod * self,
+ guint8 * out, const GstDeinterlaceScanlineData * s_orig, guint size)
+{
+ uint8_t *dst = out;
+ const int bpp = 1; // Hard code 8-bit atm
+ int w = size / bpp;
+ int edge = MAX_ALIGN / bpp - 1;
+ GstDeinterlaceScanlineData s = *s_orig;
+
+ int mode = (s.tt1 == NULL || s.bb1 == NULL || s.ttp == NULL
+ || s.bbp == NULL) ? 2 : 0;
+
+ /* When starting up, some data might not yet be available, so use the current frame */
+ if (s.m1 == NULL) {
+ s.tt1 = s.ttp;
+ s.m1 = s.mp;
+ s.bb1 = s.bbp;
+ }
+ if (s.t2 == NULL)
+ s.t2 = s.tp2;
+ if (s.b2 == NULL)
+ s.b2 = s.bp2;
+
+ filter_edges (dst, &s, w, mode);
+ filter_line_c (dst, &s, 3, w - edge, mode);
+}
projects / platform / upstream / gstreamer.git / commitdiff