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gst/videotestsrc/: Add a zone plate pattern generator based on BBC R&D Report 1978/23 (yeah *that* 1978). Try 'video...

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Original commit message from CVS:
Patch by: Jonathan Rosser <jonathan.rosser@rd.bbc.co.uk>
* gst/videotestsrc/gstvideotestsrc.c:
* gst/videotestsrc/gstvideotestsrc.h:
* gst/videotestsrc/videotestsrc.c:
* gst/videotestsrc/videotestsrc.h:
Add a zone plate pattern generator based on BBC R&D Report
1978/23 (yeah *that* 1978).  Try 'videotestsrc pattern=zone-plate
kx2=20 ky2=20 kt=1'.
This commit is contained in:
Jonathan Rosser 2008-11-21 20:32:56 +00:00 committed by David Schleef
parent d36adc543b
commit 6026260635
5 changed files with 328 additions and 2 deletions
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12
ChangeLog
View file

@ -1,3 +1,15 @@
2008-11-21 David Schleef <ds@schleef.org>
Patch by: Jonathan Rosser <jonathan.rosser@rd.bbc.co.uk>
* gst/videotestsrc/gstvideotestsrc.c:
* gst/videotestsrc/gstvideotestsrc.h:
* gst/videotestsrc/videotestsrc.c:
* gst/videotestsrc/videotestsrc.h:
Add a zone plate pattern generator based on BBC R&D Report
1978/23 (yeah *that* 1978). Try 'videotestsrc pattern=zone-plate
kx2=20 ky2=20 kt=1'.
2008-11-20 Michael Smith <msmith@songbirdnest.com>
* gst/playback/gstdecodebin2.c:

143
gst/videotestsrc/gstvideotestsrc.c
View file

@ -66,6 +66,18 @@ enum
PROP_IS_LIVE,
PROP_PEER_ALLOC,
PROP_COLOR_SPEC,
PROP_K0,
PROP_KX,
PROP_KY,
PROP_KT,
PROP_KXT,
PROP_KYT,
PROP_KXY,
PROP_KX2,
PROP_KY2,
PROP_KT2,
PROP_XOFFSET,
PROP_YOFFSET,
PROP_LAST
};
@ -116,6 +128,7 @@ gst_video_test_src_pattern_get_type (void)
{GST_VIDEO_TEST_SRC_CIRCULAR, "Circular", "circular"},
{GST_VIDEO_TEST_SRC_BLINK, "Blink", "blink"},
{GST_VIDEO_TEST_SRC_SMPTE75, "SMPTE 75% color bars", "smpte75"},
{GST_VIDEO_TEST_SRC_ZONE_PLATE, "Zone plate", "zone-plate"},
{0, NULL, NULL}
};
@ -191,6 +204,61 @@ gst_video_test_src_class_init (GstVideoTestSrcClass * klass)
"Generate video in the given color specification",
GST_TYPE_VIDEO_TEST_SRC_COLOR_SPEC,
DEFAULT_COLOR_SPEC, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_K0,
g_param_spec_int ("k0", "Zoneplate zero order phase",
"Zoneplate zero order phase, for generating plain fields or phase offsets",
G_MININT32, G_MAXINT32, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_KX,
g_param_spec_int ("kx", "Zoneplate 1st order x phase",
"Zoneplate 1st order x phase, for generating constant horizontal frequencies",
G_MININT32, G_MAXINT32, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_KY,
g_param_spec_int ("ky", "Zoneplate 1st order y phase",
"Zoneplate 1st order y phase, for generating contant vertical frequencies",
G_MININT32, G_MAXINT32, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_KT,
g_param_spec_int ("kt", "Zoneplate 1st order t phase",
"Zoneplate 1st order t phase, for generating phase rotation as a function of time",
G_MININT32, G_MAXINT32, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_KXT,
g_param_spec_int ("kxt", "Zoneplate x*t product phase",
"Zoneplate x*t product phase, normalised to kxy/256 cycles per vertical pixel at width/2 from origin",
G_MININT32, G_MAXINT32, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_KYT,
g_param_spec_int ("kyt", "Zoneplate y*t product phase",
"Zoneplate y*t product phase", G_MININT32, G_MAXINT32, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_KXY,
g_param_spec_int ("kxy", "Zoneplate x*y product phase",
"Zoneplate x*t product phase", G_MININT32, G_MAXINT32, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_KX2,
g_param_spec_int ("kx2", "Zoneplate 2nd order x phase",
"Zoneplate 2nd order x phase, normalised to kx2/256 cycles per horizontal pixel at width/2 from origin",
G_MININT32, G_MAXINT32, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_KY2,
g_param_spec_int ("ky2", "Zoneplate 2nd order y phase",
"Zoneplate 2nd order y phase, normailsed to ky2/256 cycles per vertical pixel at height/2 from origin",
G_MININT32, G_MAXINT32, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_KT2,
g_param_spec_int ("kt2", "Zoneplate 2nd order t phase",
"Zoneplate 2nd order t phase, t*t/256 cycles per picture", G_MININT32,
G_MAXINT32, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_XOFFSET,
g_param_spec_int ("xoffset", "Zoneplate 2nd order products x offset",
"Zoneplate 2nd order products x offset", G_MININT32, G_MAXINT32, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_YOFFSET,
g_param_spec_int ("yoffset", "Zoneplate 2nd order products y offset",
"Zoneplate 2nd order products y offset", G_MININT32, G_MAXINT32, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gstbasesrc_class->get_caps = gst_video_test_src_getcaps;
gstbasesrc_class->set_caps = gst_video_test_src_setcaps;
@ -283,6 +351,9 @@ gst_video_test_src_set_pattern (GstVideoTestSrc * videotestsrc,
case GST_VIDEO_TEST_SRC_SMPTE75:
videotestsrc->make_image = gst_video_test_src_smpte75;
break;
case GST_VIDEO_TEST_SRC_ZONE_PLATE:
videotestsrc->make_image = gst_video_test_src_zoneplate;
break;
default:
g_assert_not_reached ();
}
@ -310,6 +381,42 @@ gst_video_test_src_set_property (GObject * object, guint prop_id,
case PROP_COLOR_SPEC:
src->color_spec = g_value_get_enum (value);
break;
case PROP_K0:
src->k0 = g_value_get_int (value);
break;
case PROP_KX:
src->kx = g_value_get_int (value);
break;
case PROP_KY:
src->ky = g_value_get_int (value);
break;
case PROP_KT:
src->kt = g_value_get_int (value);
break;
case PROP_KXT:
src->kxt = g_value_get_int (value);
break;
case PROP_KYT:
src->kyt = g_value_get_int (value);
break;
case PROP_KXY:
src->kxy = g_value_get_int (value);
break;
case PROP_KX2:
src->kx2 = g_value_get_int (value);
break;
case PROP_KY2:
src->ky2 = g_value_get_int (value);
break;
case PROP_KT2:
src->kt2 = g_value_get_int (value);
break;
case PROP_XOFFSET:
src->xoffset = g_value_get_int (value);
break;
case PROP_YOFFSET:
src->yoffset = g_value_get_int (value);
break;
default:
break;
}
@ -337,6 +444,42 @@ gst_video_test_src_get_property (GObject * object, guint prop_id,
case PROP_COLOR_SPEC:
g_value_set_enum (value, src->color_spec);
break;
case PROP_K0:
g_value_set_int (value, src->k0);
break;
case PROP_KX:
g_value_set_int (value, src->kx);
break;
case PROP_KY:
g_value_set_int (value, src->ky);
break;
case PROP_KT:
g_value_set_int (value, src->kt);
break;
case PROP_KXT:
g_value_set_int (value, src->kxt);
break;
case PROP_KYT:
g_value_set_int (value, src->kyt);
break;
case PROP_KXY:
g_value_set_int (value, src->kxy);
break;
case PROP_KX2:
g_value_set_int (value, src->kx2);
break;
case PROP_KY2:
g_value_set_int (value, src->ky2);
break;
case PROP_KT2:
g_value_set_int (value, src->kt2);
break;
case PROP_XOFFSET:
g_value_set_int (value, src->xoffset);
break;
case PROP_YOFFSET:
g_value_set_int (value, src->yoffset);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;

18
gst/videotestsrc/gstvideotestsrc.h
View file

@ -53,6 +53,7 @@ G_BEGIN_DECLS
* @GST_VIDEO_TEST_SRC_CIRCULAR: Circular pattern
* @GST_VIDEO_TEST_SRC_BLINK: Alternate between black and white
* @GST_VIDEO_TEST_SRC_SMPTE75: SMPTE test pattern (75% color bars)
* @GST_VIDEO_TEST_SRC_ZONE_PLATE: Zone plate
*
* The test pattern to produce.
*/
@ -70,7 +71,8 @@ typedef enum {
GST_VIDEO_TEST_SRC_CHECKERS8,
GST_VIDEO_TEST_SRC_CIRCULAR,
GST_VIDEO_TEST_SRC_BLINK,
GST_VIDEO_TEST_SRC_SMPTE75
GST_VIDEO_TEST_SRC_SMPTE75,
GST_VIDEO_TEST_SRC_ZONE_PLATE
} GstVideoTestSrcPattern;
/**
@ -119,6 +121,20 @@ struct _GstVideoTestSrc {
gint64 n_frames; /* total frames sent */
gboolean peer_alloc;
/* zoneplate */
gint k0;
gint kx;
gint ky;
gint kt;
gint kxt;
gint kyt;
gint kxy;
gint kx2;
gint ky2;
gint kt2;
gint xoffset;
gint yoffset;
void (*make_image) (GstVideoTestSrc *v, unsigned char *dest, int w, int h);
};

154
gst/videotestsrc/videotestsrc.c
View file

@ -1061,6 +1061,158 @@ gst_video_test_src_checkers8 (GstVideoTestSrc * v, guchar * dest, int w, int h)
}
}
void
gst_video_test_src_zoneplate (GstVideoTestSrc * v, unsigned char *dest,
int w, int h)
{
int i;
int j;
paintinfo pi = { NULL, };
paintinfo *p = &pi;
struct fourcc_list_struct *fourcc;
struct vts_color_struct_rgb rgb_color;
struct vts_color_struct_yuv yuv_color;
static uint8_t sine_array[256];
static int sine_array_inited = FALSE;
static int t = 0; /* time - increment phase vs time by 1 for each generated frame */
/* this may not fit with the correct gstreamer notion of time, so maybe FIXME? */
int xreset = -(w / 2) - v->xoffset; /* starting values for x^2 and y^2, centering the ellipse */
int yreset = -(h / 2) - v->yoffset;
int x, y;
int accum_kx;
int accum_kxt;
int accum_ky;
int accum_kyt;
int accum_kxy;
int kt;
int kt2;
int ky2;
int delta_kxt = v->kxt * t;
int delta_kxy;
int scale_kxy = 0xffff / (w / 2);
int scale_kx2 = 0xffff / w;
if (!sine_array_inited) {
int black = 16;
int white = 235;
int range = white - black;
for (i = 0; i < 256; i++) {
sine_array[i] =
floor (range * (0.5 + 0.5 * sin (i * 2 * M_PI / 256)) + 0.5 + black);
}
sine_array_inited = TRUE;
}
p->rgb_colors = vts_colors_rgb;
if (v->color_spec == GST_VIDEO_TEST_SRC_BT601) {
p->yuv_colors = vts_colors_bt601_ycbcr_100;
} else {
p->yuv_colors = vts_colors_bt709_ycbcr_100;
}
p->width = w;
p->height = h;
fourcc = v->fourcc;
if (fourcc == NULL)
return;
fourcc->paint_setup (p, dest);
p->paint_hline = fourcc->paint_hline;
rgb_color = p->rgb_colors[COLOR_BLACK];
yuv_color = p->yuv_colors[COLOR_BLACK];
p->rgb_color = &rgb_color;
p->yuv_color = &yuv_color;
/* Zoneplate equation:
*
* phase = k0 + kx*x + ky*y + kt*t
* + kxt*x*t + kyt*y*t + kxy*x*y
* + kx2*x*x + ky2*y*y + Kt2*t*t
*/
#if 0
for (j = 0, y = yreset; j < h; j++, y++) {
for (i = 0, x = xreset; i < w; i++, x++) {
//zero order
int phase = v->k0;
//first order
phase = phase + (v->kx * i) + (v->ky * j) + (v->kt * t);
//cross term
//phase = phase + (v->kxt * i * t) + (v->kyt * j * t);
//phase = phase + (v->kxy * x * y) / (w/2);
/*second order */
/*normalise x/y terms to rate of change of phase at the picture edge */
phase =
phase + ((v->kx2 * x * x) / w) + ((v->ky2 * y * y) / h) +
((v->kt2 * t * t) >> 1);
color.Y = sine_array[phase & 0xff];
color.R = color.Y;
color.G = color.Y;
color.B = color.Y;
p->paint_hline (p, i, j, 1);
}
}
#endif
/* optimised version, with original code shown in comments */
accum_ky = 0;
accum_kyt = 0;
kt = v->kt * t;
kt2 = v->kt2 * t * t;
for (j = 0, y = yreset; j < h; j++, y++) {
accum_kx = 0;
accum_kxt = 0;
accum_ky += v->ky;
accum_kyt += v->kyt * t;
delta_kxy = v->kxy * y * scale_kxy;
accum_kxy = delta_kxy * xreset;
ky2 = (v->ky2 * y * y) / h;
for (i = 0, x = xreset; i < w; i++, x++) {
//zero order
int phase = v->k0;
//first order
accum_kx += v->kx;
//phase = phase + (v->kx * i) + (v->ky * j) + (v->kt * t);
phase = phase + accum_kx + accum_ky + kt;
//cross term
accum_kxt += delta_kxt;
accum_kxy += delta_kxy;
//phase = phase + (v->kxt * i * t) + (v->kyt * j * t);
phase = phase + accum_kxt + accum_kyt;
//phase = phase + (v->kxy * x * y) / (w/2);
//phase = phase + accum_kxy / (w/2) ;
phase = phase + (accum_kxy >> 16);
/*second order */
/*normalise x/y terms to rate of change of phase at the picture edge */
//phase = phase + ((v->kx2 * x * x)/w) + ((v->ky2 * y * y)/h) + ((v->kt2 * t * t)>>1);
phase = phase + ((v->kx2 * x * x * scale_kx2) >> 16) + ky2 + (kt2 >> 1);
yuv_color.Y = sine_array[phase & 0xff];
rgb_color.R = yuv_color.Y;
rgb_color.G = yuv_color.Y;
rgb_color.B = yuv_color.Y;
p->paint_hline (p, i, j, 1);
}
}
t++;
}
#undef SCALE_AMPLITUDE
void
gst_video_test_src_circular (GstVideoTestSrc * v, unsigned char *dest,
@ -1155,6 +1307,8 @@ gst_video_test_src_circular (GstVideoTestSrc * v, unsigned char *dest,
}
}
static void
paint_setup_I420 (paintinfo * p, unsigned char *dest)
{

3
gst/videotestsrc/videotestsrc.h
View file

@ -106,7 +106,8 @@ void gst_video_test_src_checkers8 (GstVideoTestSrc * v,
unsigned char *dest, int w, int h);
void gst_video_test_src_circular (GstVideoTestSrc * v,
unsigned char *dest, int w, int h);
void gst_video_test_src_zoneplate (GstVideoTestSrc * v,
unsigned char *dest, int w, int h);
extern struct fourcc_list_struct fourcc_list[];
extern int n_fourccs;