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plugins code cleanup : moved the duplicated fixed point table loockup based sinus/cosinus functions to fixedpoint.c, removed the bmp size definition in the clock.c|-(useless as the size is already defined in a .h generated with every bitmaps ...)

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14087 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Kevin Ferrare 2007-07-31 04:59:03 +00:00
parent 4e8b171fc4
commit df4f56b2b0
6 changed files with 118 additions and 378 deletions
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57
apps/plugins/plasma.c
View file

@ -29,6 +29,7 @@
#ifndef HAVE_LCD_COLOR
#include "gray.h"
#endif
#include "fixedpoint.h"
PLUGIN_HEADER
@ -101,60 +102,6 @@ static int plasma_frequency;
#define WAV_AMP 90
/* Precalculated sine * 16384 (fixed point 18.14) */
static const short sin_table[91] =
{
0, 285, 571, 857, 1142, 1427, 1712, 1996, 2280, 2563,
2845, 3126, 3406, 3685, 3963, 4240, 4516, 4790, 5062, 5334,
5603, 5871, 6137, 6401, 6663, 6924, 7182, 7438, 7691, 7943,
8191, 8438, 8682, 8923, 9161, 9397, 9630, 9860, 10086, 10310,
10531, 10748, 10963, 11173, 11381, 11585, 11785, 11982, 12175, 12365,
12550, 12732, 12910, 13084, 13254, 13420, 13582, 13740, 13894, 14043,
14188, 14329, 14466, 14598, 14725, 14848, 14967, 15081, 15190, 15295,
15395, 15491, 15582, 15668, 15749, 15825, 15897, 15964, 16025, 16082,
16135, 16182, 16224, 16261, 16294, 16321, 16344, 16361, 16374, 16381,
16384
};
static short sin(int val)
{
/* value should be between 0 and 360 degree for correct lookup*/
val%=360;
if(val<0)
val+=360;
/* Speed improvement through successive lookup */
if (val < 181)
{
if (val < 91)
{
/* phase 0-90 degree */
return (short)sin_table[val];
}
else
{
/* phase 91-180 degree */
return (short)sin_table[180-val];
}
}
else
{
if (val < 271)
{
/* phase 181-270 degree */
return -(short)sin_table[val-180];
}
else
{
/* phase 270-359 degree */
return -(short)sin_table[360-val];
}
}
return 0;
}
/*
* Main wave function so we don't have to re-calc the sine
* curve every time. Mess around WAV_AMP and FREQ to make slighlty
@ -167,7 +114,7 @@ static void wave_table_generate(void)
for (i=0;i<256;++i)
{
wave_array[i] = (unsigned char)((WAV_AMP
* (sin((i * 360 * plasma_frequency) / 256))) / 16384);
* (sin_int((i * 360 * plasma_frequency) / 256))) / 16384);
}
}