[gst-cvs] gst-plugins-base: videotestsrc: Use static sine table
David Schleef
ds at kemper.freedesktop.org
Sun Sep 5 20:59:58 PDT 2010
Module: gst-plugins-base
Branch: master
Commit: d03fc85095d32461455875f1ecd63cce9cdce64f
URL: http://cgit.freedesktop.org/gstreamer/gst-plugins-base/commit/?id=d03fc85095d32461455875f1ecd63cce9cdce64f
Author: David Schleef <ds at schleef.org>
Date: Sun Sep 5 20:57:48 2010 -0700
videotestsrc: Use static sine table
---
gst/videotestsrc/Makefile.am | 5 ++
gst/videotestsrc/generate_sine_table.c | 42 ++++++++++++++++
gst/videotestsrc/videotestsrc.c | 84 ++++++++++++++++----------------
3 files changed, 89 insertions(+), 42 deletions(-)
diff --git a/gst/videotestsrc/Makefile.am b/gst/videotestsrc/Makefile.am
index 4e21874..12f357d 100644
--- a/gst/videotestsrc/Makefile.am
+++ b/gst/videotestsrc/Makefile.am
@@ -15,4 +15,9 @@ libgstvideotestsrc_la_LIBTOOLFLAGS = --tag=disable-static
noinst_HEADERS = gstvideotestsrc.h videotestsrc.h
+noinst_PROGRAMS = generate_sine_table
+
+generate_sine_table_SOURCES = generate_sine_table.c
+generate_sine_table_CFLAGS = $(GST_CFLAGS)
+generate_sine_table_LDADD = $(LIBM)
diff --git a/gst/videotestsrc/generate_sine_table.c b/gst/videotestsrc/generate_sine_table.c
new file mode 100644
index 0000000..4d8e571
--- /dev/null
+++ b/gst/videotestsrc/generate_sine_table.c
@@ -0,0 +1,42 @@
+
+#include <stdio.h>
+#include <math.h>
+
+
+static int
+get_value (int i)
+{
+ int x;
+
+ x = floor (256 * (0.5 + 0.5 * sin (i * 2 * M_PI / 256)));
+ if (x > 255)
+ x = 255;
+ return x;
+}
+
+int
+main (int argc, char *argv[])
+{
+ int i;
+ int j;
+
+ printf ("static const guint8\n");
+ printf ("sine_table[256] = {\n");
+ for (i = 0; i < 256; i += 8) {
+ printf (" ");
+ for (j = 0; j < 8; j++) {
+ printf ("%3d", get_value (i + j));
+ if (j != 7) {
+ printf (", ");
+ } else {
+ if (i + j != 255) {
+ printf (",\n");
+ } else {
+ printf ("\n");
+ }
+ }
+ }
+ }
+ printf ("};\n");
+
+}
diff --git a/gst/videotestsrc/videotestsrc.c b/gst/videotestsrc/videotestsrc.c
index de7f336..d4c61a6 100644
--- a/gst/videotestsrc/videotestsrc.c
+++ b/gst/videotestsrc/videotestsrc.c
@@ -1179,6 +1179,42 @@ gst_video_test_src_checkers8 (GstVideoTestSrc * v, guchar * dest, int w, int h)
}
}
+static const guint8 sine_table[256] = {
+ 128, 131, 134, 137, 140, 143, 146, 149,
+ 152, 156, 159, 162, 165, 168, 171, 174,
+ 176, 179, 182, 185, 188, 191, 193, 196,
+ 199, 201, 204, 206, 209, 211, 213, 216,
+ 218, 220, 222, 224, 226, 228, 230, 232,
+ 234, 236, 237, 239, 240, 242, 243, 245,
+ 246, 247, 248, 249, 250, 251, 252, 252,
+ 253, 254, 254, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 254, 254,
+ 253, 252, 252, 251, 250, 249, 248, 247,
+ 246, 245, 243, 242, 240, 239, 237, 236,
+ 234, 232, 230, 228, 226, 224, 222, 220,
+ 218, 216, 213, 211, 209, 206, 204, 201,
+ 199, 196, 193, 191, 188, 185, 182, 179,
+ 176, 174, 171, 168, 165, 162, 159, 156,
+ 152, 149, 146, 143, 140, 137, 134, 131,
+ 128, 124, 121, 118, 115, 112, 109, 106,
+ 103, 99, 96, 93, 90, 87, 84, 81,
+ 79, 76, 73, 70, 67, 64, 62, 59,
+ 56, 54, 51, 49, 46, 44, 42, 39,
+ 37, 35, 33, 31, 29, 27, 25, 23,
+ 21, 19, 18, 16, 15, 13, 12, 10,
+ 9, 8, 7, 6, 5, 4, 3, 3,
+ 2, 1, 1, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 1, 1,
+ 2, 3, 3, 4, 5, 6, 7, 8,
+ 9, 10, 12, 13, 15, 16, 18, 19,
+ 21, 23, 25, 27, 29, 31, 33, 35,
+ 37, 39, 42, 44, 46, 49, 51, 54,
+ 56, 59, 62, 64, 67, 70, 73, 76,
+ 79, 81, 84, 87, 90, 93, 96, 99,
+ 103, 106, 109, 112, 115, 118, 121, 124
+};
+
+
void
gst_video_test_src_zoneplate (GstVideoTestSrc * v, unsigned char *dest,
int w, int h)
@@ -1189,8 +1225,6 @@ gst_video_test_src_zoneplate (GstVideoTestSrc * v, unsigned char *dest,
paintinfo *p = π
struct fourcc_list_struct *fourcc;
struct vts_color_struct color;
- static guint8 sine_array[256];
- static int sine_array_inited = FALSE;
int t = v->zoneplate_t;
int xreset = -(w / 2) - v->xoffset; /* starting values for x^2 and y^2, centering the ellipse */
int yreset = -(h / 2) - v->yoffset;
@@ -1209,17 +1243,6 @@ gst_video_test_src_zoneplate (GstVideoTestSrc * v, unsigned char *dest,
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;
- }
-
videotestsrc_setup_paintinfo (v, p, w, h);
fourcc = v->fourcc;
if (fourcc == NULL)
@@ -1257,7 +1280,7 @@ gst_video_test_src_zoneplate (GstVideoTestSrc * v, unsigned char *dest,
phase + ((v->kx2 * x * x) / w) + ((v->ky2 * y * y) / h) +
((v->kt2 * t * t) >> 1);
- color.Y = sine_array[phase & 0xff];
+ color.Y = sine_table[phase & 0xff];
color.R = color.Y;
color.G = color.Y;
@@ -1306,7 +1329,7 @@ gst_video_test_src_zoneplate (GstVideoTestSrc * v, unsigned char *dest,
phase = phase + ((v->kx2 * x * x * scale_kx2) >> 16) + ky2 + (kt2 >> 1);
videotestsrc_blend_color (&color, &p->foreground_color,
- &p->background_color, sine_array[phase & 0xff]);
+ &p->background_color, sine_table[phase & 0xff]);
p->paint_hline (p, i, j, 1);
}
@@ -1325,8 +1348,6 @@ gst_video_test_src_chromazoneplate (GstVideoTestSrc * v, unsigned char *dest,
paintinfo *p = π
struct fourcc_list_struct *fourcc;
struct vts_color_struct color;
- static guint8 sine_array[256];
- static int sine_array_inited = FALSE;
int t = v->zoneplate_t;
int xreset = -(w / 2) - v->xoffset; /* starting values for x^2 and y^2, centering the ellipse */
@@ -1346,17 +1367,6 @@ gst_video_test_src_chromazoneplate (GstVideoTestSrc * v, unsigned char *dest,
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;
- }
-
videotestsrc_setup_paintinfo (v, p, w, h);
fourcc = v->fourcc;
if (fourcc == NULL)
@@ -1413,8 +1423,8 @@ gst_video_test_src_chromazoneplate (GstVideoTestSrc * v, unsigned char *dest,
phase = phase + ((v->kx2 * x * x * scale_kx2) >> 16) + ky2 + (kt2 >> 1);
color.Y = 128;
- color.U = sine_array[phase & 0xff];
- color.V = sine_array[phase & 0xff];
+ color.U = sine_table[phase & 0xff];
+ color.V = sine_table[phase & 0xff];
color.R = 128;
color.G = 128;
@@ -1439,8 +1449,6 @@ gst_video_test_src_circular (GstVideoTestSrc * v, unsigned char *dest,
paintinfo *p = π
struct fourcc_list_struct *fourcc;
struct vts_color_struct color;
- static guint8 sine_array[256];
- static int sine_array_inited = FALSE;
double freq[8];
#ifdef SCALE_AMPLITUDE
@@ -1448,14 +1456,6 @@ gst_video_test_src_circular (GstVideoTestSrc * v, unsigned char *dest,
#endif
int d;
- if (!sine_array_inited) {
- for (i = 0; i < 256; i++) {
- sine_array[i] =
- floor (255 * (0.5 + 0.5 * sin (i * 2 * M_PI / 256)) + 0.5);
- }
- sine_array_inited = TRUE;
- }
-
videotestsrc_setup_paintinfo (v, p, w, h);
fourcc = v->fourcc;
if (fourcc == NULL)
@@ -1499,10 +1499,10 @@ gst_video_test_src_circular (GstVideoTestSrc * v, unsigned char *dest,
if (a < 0)
a = 0;
videotestsrc_blend_color (&color, &p->foreground_color,
- &p->background_color, 128 + a * (sine_array[d & 0xff] - 128));
+ &p->background_color, 128 + a * (sine_table[d & 0xff] - 128));
#else
videotestsrc_blend_color (&color, &p->foreground_color,
- &p->background_color, sine_array[d & 0xff]);
+ &p->background_color, sine_table[d & 0xff]);
#endif
}
p->paint_hline (p, i, j, 1);
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