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gst/deinterlace2/gstdeinterlace2.*: Add a GstDeinterlaceSimpleMethod subclass of GstDeinterlaceMethod that can be use...

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Original commit message from CVS:
* gst/deinterlace2/gstdeinterlace2.c:
(gst_deinterlace_simple_method_interpolate_scanline),
(gst_deinterlace_simple_method_copy_scanline),
(gst_deinterlace_simple_method_deinterlace_frame),
(gst_deinterlace_simple_method_class_init),
(gst_deinterlace_simple_method_init):
* gst/deinterlace2/gstdeinterlace2.h:
Add a GstDeinterlaceSimpleMethod subclass of GstDeinterlaceMethod that
can be used by simple deinterlacing methods. They only have to provide
a function for interpolating a scanline or copying a scanline.
This commit is contained in:
Sebastian Dröge 2008-08-02 18:18:54 +00:00
parent 8cbe2b9912
commit 163ff0f9a4
3 changed files with 238 additions and 0 deletions
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13
ChangeLog
View file

@ -1,3 +1,16 @@
2008-08-02 Sebastian Dröge <sebastian.droege@collabora.co.uk>
* gst/deinterlace2/gstdeinterlace2.c:
(gst_deinterlace_simple_method_interpolate_scanline),
(gst_deinterlace_simple_method_copy_scanline),
(gst_deinterlace_simple_method_deinterlace_frame),
(gst_deinterlace_simple_method_class_init),
(gst_deinterlace_simple_method_init):
* gst/deinterlace2/gstdeinterlace2.h:
Add a GstDeinterlaceSimpleMethod subclass of GstDeinterlaceMethod that
can be used by simple deinterlacing methods. They only have to provide
a function for interpolating a scanline or copying a scanline.
2008-08-02 Sebastian Dröge <sebastian.droege@collabora.co.uk>
* gst/deinterlace2/gstdeinterlace2.c: (gst_deinterlace2_chain):

163
gst/deinterlace2/gstdeinterlace2.c
View file

@ -89,6 +89,169 @@ gst_deinterlace_method_get_latency (GstDeinterlaceMethod * self)
return klass->latency;
}
G_DEFINE_TYPE (GstDeinterlaceSimpleMethod, gst_deinterlace_simple_method,
GST_TYPE_DEINTERLACE_METHOD);
static void
gst_deinterlace_simple_method_interpolate_scanline (GstDeinterlaceMethod * self,
GstDeinterlace2 * parent, guint8 * out,
GstDeinterlaceScanlineData * scanlines, gint width)
{
memcpy (out, scanlines->m1, parent->line_length);
}
static void
gst_deinterlace_simple_method_copy_scanline (GstDeinterlaceMethod * self,
GstDeinterlace2 * parent, guint8 * out,
GstDeinterlaceScanlineData * scanlines, gint width)
{
memcpy (out, scanlines->m0, parent->line_length);
}
static void
gst_deinterlace_simple_method_deinterlace_frame (GstDeinterlaceMethod * self,
GstDeinterlace2 * parent)
{
GstDeinterlaceSimpleMethodClass *dsm_class =
GST_DEINTERLACE_SIMPLE_METHOD_GET_CLASS (self);
GstDeinterlaceMethodClass *dm_class = GST_DEINTERLACE_METHOD_GET_CLASS (self);
GstDeinterlaceScanlineData scanlines;
guint8 *out = GST_BUFFER_DATA (parent->out_buf);
guint8 *field0 = NULL, *field1 = NULL, *field2 = NULL, *field3 = NULL;
gint cur_field_idx = parent->history_count - dm_class->fields_required;
guint cur_field_flags = parent->field_history[cur_field_idx].flags;
gint line;
field0 = GST_BUFFER_DATA (parent->field_history[cur_field_idx].buf);
g_assert (dm_class->fields_required <= 4);
if (dm_class->fields_required >= 2)
field1 = field0 =
GST_BUFFER_DATA (parent->field_history[cur_field_idx + 1].buf);
if (dm_class->fields_required >= 3)
field1 = field0 =
GST_BUFFER_DATA (parent->field_history[cur_field_idx + 2].buf);
if (dm_class->fields_required >= 4)
field1 = field0 =
GST_BUFFER_DATA (parent->field_history[cur_field_idx + 3].buf);
if (cur_field_flags == PICTURE_INTERLACED_BOTTOM) {
/* double the first scanline of the bottom field */
memcpy (out, field0, parent->line_length);
out += parent->output_stride;
}
memcpy (out, field0, parent->line_length);
out += parent->output_stride;
for (line = 2; line <= parent->field_height; line++) {
memset (&scanlines, 0, sizeof (scanlines));
scanlines.bottom_field = (cur_field_flags == PICTURE_INTERLACED_BOTTOM);
/* interp. scanline */
scanlines.t0 = field0;
scanlines.b0 = field0 + parent->field_stride;
if (field1 != NULL) {
scanlines.tt1 = field1;
scanlines.m1 = field1 + parent->field_stride;
scanlines.bb1 = field1 + parent->field_stride * 2;
field1 += parent->field_stride;
}
if (field2 != NULL) {
scanlines.t2 = field2;
scanlines.b2 = field2 + parent->field_stride;
}
if (field3 != NULL) {
scanlines.tt3 = field3;
scanlines.m3 = field3 + parent->field_stride;
scanlines.bb3 = field3 + parent->field_stride * 2;
field3 += parent->field_stride;
}
/* set valid data for corner cases */
if (line == 2) {
scanlines.tt1 = scanlines.bb1;
scanlines.tt3 = scanlines.bb3;
} else if (line == parent->field_height) {
scanlines.bb1 = scanlines.tt1;
scanlines.bb3 = scanlines.tt3;
}
dsm_class->interpolate_scanline (self, parent, out, &scanlines,
parent->frame_width);
out += parent->output_stride;
memset (&scanlines, 0, sizeof (scanlines));
scanlines.bottom_field = (cur_field_flags == PICTURE_INTERLACED_BOTTOM);
/* copy a scanline */
scanlines.tt0 = field0;
scanlines.m0 = field0 + parent->field_stride;
scanlines.bb0 = field0 + parent->field_stride * 2;
field0 += parent->field_stride;
if (field1 != NULL) {
scanlines.t1 = field1;
scanlines.b1 = field1 + parent->field_stride;
}
if (field2 != NULL) {
scanlines.tt2 = field2;
scanlines.m2 = field2 + parent->field_stride;
scanlines.bb2 = field2 + parent->field_stride * 2;
field2 += parent->field_stride;
}
if (field3 != NULL) {
scanlines.t3 = field3;
scanlines.b3 = field3 + parent->field_stride;
}
/* set valid data for corner cases */
if (line == parent->field_height) {
scanlines.bb0 = scanlines.tt0;
scanlines.b1 = scanlines.t1;
scanlines.bb2 = scanlines.tt2;
scanlines.b3 = scanlines.t3;
}
dsm_class->copy_scanline (self, parent, out, &scanlines,
parent->frame_width);
out += parent->output_stride;
}
if (cur_field_flags == PICTURE_INTERLACED_TOP) {
/* double the last scanline of the top field */
memcpy (out, field0, parent->line_length);
}
}
static void
gst_deinterlace_simple_method_class_init (GstDeinterlaceSimpleMethodClass *
klass)
{
GstDeinterlaceMethodClass *dm_class = (GstDeinterlaceMethodClass *) klass;
dm_class->deinterlace_frame = gst_deinterlace_simple_method_deinterlace_frame;
dm_class->fields_required = 2;
klass->interpolate_scanline =
gst_deinterlace_simple_method_interpolate_scanline;
klass->copy_scanline = gst_deinterlace_simple_method_copy_scanline;
}
static void
gst_deinterlace_simple_method_init (GstDeinterlaceSimpleMethod * self)
{
}
#define GST_TYPE_DEINTERLACE2_METHODS (gst_deinterlace2_methods_get_type ())
static GType
gst_deinterlace2_methods_get_type (void)

62
gst/deinterlace2/gstdeinterlace2.h
View file

@ -84,6 +84,68 @@ struct _GstDeinterlaceMethodClass {
GType gst_deinterlace_method_get_type (void);
#define GST_TYPE_DEINTERLACE_SIMPLE_METHOD (gst_deinterlace_simple_method_get_type ())
#define GST_IS_DEINTERLACE_SIMPLE_METHOD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_DEINTERLACE_SIMPLE_METHOD))
#define GST_IS_DEINTERLACE_SIMPLE_METHOD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_DEINTERLACE_SIMPLE_METHOD))
#define GST_DEINTERLACE_SIMPLE_METHOD_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_DEINTERLACE_SIMPLE_METHOD, GstDeinterlaceSimpleMethodClass))
#define GST_DEINTERLACE_SIMPLE_METHOD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_DEINTERLACE_SIMPLE_METHOD, GstDeinterlaceSimpleMethod))
#define GST_DEINTERLACE_SIMPLE_METHOD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_DEINTERLACE_SIMPLE_METHOD, GstDeinterlaceSimpleMethodClass))
#define GST_DEINTERLACE_SIMPLE_METHOD_CAST(obj) ((GstDeinterlaceSimpleMethod*)(obj))
typedef struct _GstDeinterlaceSimpleMethod GstDeinterlaceSimpleMethod;
typedef struct _GstDeinterlaceSimpleMethodClass GstDeinterlaceSimpleMethodClass;
typedef struct _GstDeinterlaceScanlineData GstDeinterlaceScanlineData;
/*
* This structure defines the simple deinterlacer plugin.
*/
struct _GstDeinterlaceScanlineData {
guint8 *tt0, *t0, *m0, *b0, *bb0;
guint8 *tt1, *t1, *m1, *b1, *bb1;
guint8 *tt2, *t2, *m2, *b2, *bb2;
guint8 *tt3, *t3, *m3, *b3, *bb3;
gboolean bottom_field;
};
/**
* For interpolate_scanline the input is:
*
* | t-3 t-2 t-1 t
* | Field 3 | Field 2 | Field 1 | Field 0 |
* | TT3 | | TT1 | |
* | | T2 | | T0 |
* | M3 | | M1 | |
* | | B2 | | B0 |
* | BB3 | | BB1 | |
*
* For copy_scanline the input is:
*
* | t-3 t-2 t-1 t
* | Field 3 | Field 2 | Field 1 | Field 0 |
* | | TT2 | | TT0 |
* | T3 | | T1 | |
* | | M2 | | M0 |
* | B3 | | B1 | |
* | | BB2 | | BB0 |
*
* All other values are NULL.
*/
struct _GstDeinterlaceSimpleMethod {
GstDeinterlaceMethod parent;
};
struct _GstDeinterlaceSimpleMethodClass {
GstDeinterlaceMethodClass parent_class;
void (*interpolate_scanline) (GstDeinterlaceMethod *self, GstDeinterlace2 * parent, guint8 *out, GstDeinterlaceScanlineData *scanlines, gint width);
void (*copy_scanline) (GstDeinterlaceMethod *self, GstDeinterlace2 * parent, guint8 *out, GstDeinterlaceScanlineData *scanlines, gint width);
};
GType gst_deinterlace_simple_method_get_type (void);
#define MAX_FIELD_HISTORY 10
#define PICTURE_PROGRESSIVE 0