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videotestsrc: Use static sine table
This commit is contained in:
David Schleef
parent
131d619737
commit
d03fc85095
3 changed files with 89 additions and 42 deletions
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@ -15,4 +15,9 @@ libgstvideotestsrc_la_LIBTOOLFLAGS = --tag=disable-static
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noinst_HEADERS = gstvideotestsrc.h videotestsrc.h
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noinst_PROGRAMS = generate_sine_table
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generate_sine_table_SOURCES = generate_sine_table.c
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generate_sine_table_CFLAGS = $(GST_CFLAGS)
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generate_sine_table_LDADD = $(LIBM)
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42
gst/videotestsrc/generate_sine_table.c
Normal file
42
gst/videotestsrc/generate_sine_table.c
Normal file
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@ -0,0 +1,42 @@
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#include <stdio.h>
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#include <math.h>
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static int
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get_value (int i)
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{
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int x;
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x = floor (256 * (0.5 + 0.5 * sin (i * 2 * M_PI / 256)));
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if (x > 255)
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x = 255;
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return x;
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}
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int
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main (int argc, char *argv[])
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{
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int i;
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int j;
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printf ("static const guint8\n");
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printf ("sine_table[256] = {\n");
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for (i = 0; i < 256; i += 8) {
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printf (" ");
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for (j = 0; j < 8; j++) {
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printf ("%3d", get_value (i + j));
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if (j != 7) {
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printf (", ");
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} else {
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if (i + j != 255) {
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printf (",\n");
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} else {
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printf ("\n");
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}
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}
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}
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}
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printf ("};\n");
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}
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@ -1179,6 +1179,42 @@ gst_video_test_src_checkers8 (GstVideoTestSrc * v, guchar * dest, int w, int h)
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}
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}
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static const guint8 sine_table[256] = {
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128, 131, 134, 137, 140, 143, 146, 149,
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152, 156, 159, 162, 165, 168, 171, 174,
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176, 179, 182, 185, 188, 191, 193, 196,
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199, 201, 204, 206, 209, 211, 213, 216,
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218, 220, 222, 224, 226, 228, 230, 232,
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234, 236, 237, 239, 240, 242, 243, 245,
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246, 247, 248, 249, 250, 251, 252, 252,
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253, 254, 254, 255, 255, 255, 255, 255,
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255, 255, 255, 255, 255, 255, 254, 254,
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253, 252, 252, 251, 250, 249, 248, 247,
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246, 245, 243, 242, 240, 239, 237, 236,
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234, 232, 230, 228, 226, 224, 222, 220,
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218, 216, 213, 211, 209, 206, 204, 201,
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199, 196, 193, 191, 188, 185, 182, 179,
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176, 174, 171, 168, 165, 162, 159, 156,
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152, 149, 146, 143, 140, 137, 134, 131,
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128, 124, 121, 118, 115, 112, 109, 106,
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103, 99, 96, 93, 90, 87, 84, 81,
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79, 76, 73, 70, 67, 64, 62, 59,
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56, 54, 51, 49, 46, 44, 42, 39,
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37, 35, 33, 31, 29, 27, 25, 23,
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21, 19, 18, 16, 15, 13, 12, 10,
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9, 8, 7, 6, 5, 4, 3, 3,
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2, 1, 1, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 1, 1,
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2, 3, 3, 4, 5, 6, 7, 8,
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9, 10, 12, 13, 15, 16, 18, 19,
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21, 23, 25, 27, 29, 31, 33, 35,
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37, 39, 42, 44, 46, 49, 51, 54,
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56, 59, 62, 64, 67, 70, 73, 76,
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79, 81, 84, 87, 90, 93, 96, 99,
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103, 106, 109, 112, 115, 118, 121, 124
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};
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void
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gst_video_test_src_zoneplate (GstVideoTestSrc * v, unsigned char *dest,
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int w, int h)
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@ -1189,8 +1225,6 @@ gst_video_test_src_zoneplate (GstVideoTestSrc * v, unsigned char *dest,
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paintinfo *p = π
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struct fourcc_list_struct *fourcc;
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struct vts_color_struct color;
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static guint8 sine_array[256];
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static int sine_array_inited = FALSE;
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int t = v->zoneplate_t;
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int xreset = -(w / 2) - v->xoffset; /* starting values for x^2 and y^2, centering the ellipse */
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int yreset = -(h / 2) - v->yoffset;
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@ -1209,17 +1243,6 @@ gst_video_test_src_zoneplate (GstVideoTestSrc * v, unsigned char *dest,
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int scale_kxy = 0xffff / (w / 2);
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int scale_kx2 = 0xffff / w;
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if (!sine_array_inited) {
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int black = 16;
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int white = 235;
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int range = white - black;
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for (i = 0; i < 256; i++) {
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sine_array[i] =
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floor (range * (0.5 + 0.5 * sin (i * 2 * M_PI / 256)) + 0.5 + black);
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}
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sine_array_inited = TRUE;
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}
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videotestsrc_setup_paintinfo (v, p, w, h);
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fourcc = v->fourcc;
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if (fourcc == NULL)
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@ -1257,7 +1280,7 @@ gst_video_test_src_zoneplate (GstVideoTestSrc * v, unsigned char *dest,
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phase + ((v->kx2 * x * x) / w) + ((v->ky2 * y * y) / h) +
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((v->kt2 * t * t) >> 1);
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color.Y = sine_array[phase & 0xff];
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color.Y = sine_table[phase & 0xff];
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color.R = color.Y;
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color.G = color.Y;
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@ -1306,7 +1329,7 @@ gst_video_test_src_zoneplate (GstVideoTestSrc * v, unsigned char *dest,
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phase = phase + ((v->kx2 * x * x * scale_kx2) >> 16) + ky2 + (kt2 >> 1);
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videotestsrc_blend_color (&color, &p->foreground_color,
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&p->background_color, sine_array[phase & 0xff]);
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&p->background_color, sine_table[phase & 0xff]);
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p->paint_hline (p, i, j, 1);
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}
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@ -1325,8 +1348,6 @@ gst_video_test_src_chromazoneplate (GstVideoTestSrc * v, unsigned char *dest,
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paintinfo *p = π
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struct fourcc_list_struct *fourcc;
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struct vts_color_struct color;
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static guint8 sine_array[256];
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static int sine_array_inited = FALSE;
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int t = v->zoneplate_t;
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int xreset = -(w / 2) - v->xoffset; /* starting values for x^2 and y^2, centering the ellipse */
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@ -1346,17 +1367,6 @@ gst_video_test_src_chromazoneplate (GstVideoTestSrc * v, unsigned char *dest,
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int scale_kxy = 0xffff / (w / 2);
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int scale_kx2 = 0xffff / w;
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if (!sine_array_inited) {
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int black = 16;
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int white = 235;
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int range = white - black;
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for (i = 0; i < 256; i++) {
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sine_array[i] =
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floor (range * (0.5 + 0.5 * sin (i * 2 * M_PI / 256)) + 0.5 + black);
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}
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sine_array_inited = TRUE;
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}
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videotestsrc_setup_paintinfo (v, p, w, h);
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fourcc = v->fourcc;
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if (fourcc == NULL)
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@ -1413,8 +1423,8 @@ gst_video_test_src_chromazoneplate (GstVideoTestSrc * v, unsigned char *dest,
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phase = phase + ((v->kx2 * x * x * scale_kx2) >> 16) + ky2 + (kt2 >> 1);
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color.Y = 128;
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color.U = sine_array[phase & 0xff];
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color.V = sine_array[phase & 0xff];
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color.U = sine_table[phase & 0xff];
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color.V = sine_table[phase & 0xff];
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color.R = 128;
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color.G = 128;
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@ -1439,8 +1449,6 @@ gst_video_test_src_circular (GstVideoTestSrc * v, unsigned char *dest,
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paintinfo *p = π
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struct fourcc_list_struct *fourcc;
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struct vts_color_struct color;
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static guint8 sine_array[256];
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static int sine_array_inited = FALSE;
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double freq[8];
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#ifdef SCALE_AMPLITUDE
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@ -1448,14 +1456,6 @@ gst_video_test_src_circular (GstVideoTestSrc * v, unsigned char *dest,
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#endif
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int d;
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if (!sine_array_inited) {
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for (i = 0; i < 256; i++) {
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sine_array[i] =
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floor (255 * (0.5 + 0.5 * sin (i * 2 * M_PI / 256)) + 0.5);
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}
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sine_array_inited = TRUE;
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}
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videotestsrc_setup_paintinfo (v, p, w, h);
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fourcc = v->fourcc;
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if (fourcc == NULL)
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@ -1499,10 +1499,10 @@ gst_video_test_src_circular (GstVideoTestSrc * v, unsigned char *dest,
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if (a < 0)
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a = 0;
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videotestsrc_blend_color (&color, &p->foreground_color,
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&p->background_color, 128 + a * (sine_array[d & 0xff] - 128));
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&p->background_color, 128 + a * (sine_table[d & 0xff] - 128));
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#else
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videotestsrc_blend_color (&color, &p->foreground_color,
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&p->background_color, sine_array[d & 0xff]);
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&p->background_color, sine_table[d & 0xff]);
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#endif
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}
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p->paint_hline (p, i, j, 1);
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