Commit 84ed474e authored by David Schleef's avatar David Schleef
Browse files

videotestsrc: add chroma-zone-plate pattern

pattern=chroma-zone-plate is pattern similar to zone-plate,
but in the chroma channels instead of luma.
parent ed438e55
......@@ -130,6 +130,8 @@ gst_video_test_src_pattern_get_type (void)
{GST_VIDEO_TEST_SRC_SMPTE75, "SMPTE 75% color bars", "smpte75"},
{GST_VIDEO_TEST_SRC_ZONE_PLATE, "Zone plate", "zone-plate"},
{GST_VIDEO_TEST_SRC_GAMUT, "Gamut checkers", "gamut"},
{GST_VIDEO_TEST_SRC_CHROMA_ZONE_PLATE, "Chroma zone plate",
"chroma-zone-plate"},
{0, NULL, NULL}
};
......@@ -358,6 +360,9 @@ gst_video_test_src_set_pattern (GstVideoTestSrc * videotestsrc,
case GST_VIDEO_TEST_SRC_GAMUT:
videotestsrc->make_image = gst_video_test_src_gamut;
break;
case GST_VIDEO_TEST_SRC_CHROMA_ZONE_PLATE:
videotestsrc->make_image = gst_video_test_src_chromazoneplate;
break;
default:
g_assert_not_reached ();
}
......
......@@ -55,6 +55,7 @@ G_BEGIN_DECLS
* @GST_VIDEO_TEST_SRC_SMPTE75: SMPTE test pattern (75% color bars)
* @GST_VIDEO_TEST_SRC_ZONE_PLATE: Zone plate
* @GST_VIDEO_TEST_SRC_GAMUT: Gamut checking pattern
* @GST_VIDEO_TEST_SRC_CHROMA_ZONE_PLATE: Chroma zone plate
*
* The test pattern to produce.
*
......@@ -66,6 +67,14 @@ G_BEGIN_DECLS
* pattern is still visible after conversion, this indicates a faulty
* conversion. Image manipulation, such as adjusting contrast or
* brightness, can also cause the pattern to be visible.
*
* The Zone Plate pattern is based on BBC R&D Report 1978/23, and can
* be used to test spatial frequency response of a system. This
* pattern generator is controlled by the xoffset and yoffset parameters
* and also by all the parameters starting with 'k'. The default
* parameters produce a grey pattern. Try 'videotestsrc
* pattern=zone-plate kx2=20 ky2=20 kt=1' to produce something
* interesting.
*/
typedef enum {
GST_VIDEO_TEST_SRC_SMPTE,
......@@ -83,7 +92,8 @@ typedef enum {
GST_VIDEO_TEST_SRC_BLINK,
GST_VIDEO_TEST_SRC_SMPTE75,
GST_VIDEO_TEST_SRC_ZONE_PLATE,
GST_VIDEO_TEST_SRC_GAMUT
GST_VIDEO_TEST_SRC_GAMUT,
GST_VIDEO_TEST_SRC_CHROMA_ZONE_PLATE
} GstVideoTestSrcPattern;
/**
......
......@@ -1356,6 +1356,137 @@ gst_video_test_src_zoneplate (GstVideoTestSrc * v, unsigned char *dest,
t++;
}
void
gst_video_test_src_chromazoneplate (GstVideoTestSrc * v, unsigned char *dest,
int w, int h)
{
int i;
int j;
paintinfo pi = { NULL, };
paintinfo *p = π
struct fourcc_list_struct *fourcc;
struct vts_color_struct_rgb rgb_color;
struct vts_color_struct_yuv yuv_color;
struct vts_color_struct_gray gray_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->gray_colors = vts_colors_gray_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];
gray_color = p->gray_colors[COLOR_BLACK];
p->rgb_color = &rgb_color;
p->yuv_color = &yuv_color;
p->gray_color = &gray_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
*/
/* 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 = 128;
yuv_color.U = sine_array[phase & 0xff];
yuv_color.V = sine_array[phase & 0xff];
rgb_color.R = 128;
rgb_color.G = 128;
rgb_color.B = yuv_color.V;
gray_color.G = yuv_color.Y << 8;
p->paint_hline (p, i, j, 1);
}
}
t++;
}
#undef SCALE_AMPLITUDE
#undef SCALE_AMPLITUDE
void
gst_video_test_src_circular (GstVideoTestSrc * v, unsigned char *dest,
......
......@@ -116,6 +116,8 @@ void gst_video_test_src_zoneplate (GstVideoTestSrc * v,
unsigned char *dest, int w, int h);
void gst_video_test_src_gamut (GstVideoTestSrc * v,
unsigned char *dest, int w, int h);
void gst_video_test_src_chromazoneplate (GstVideoTestSrc * v,
unsigned char *dest, int w, int h);
extern struct fourcc_list_struct fourcc_list[];
extern int n_fourccs;
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment