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| author | Jens Arnold <amiconn@rockbox.org> | 2009-11-22 13:35:41 +0000 |
|---|---|---|
| committer | Jens Arnold <amiconn@rockbox.org> | 2009-11-22 13:35:41 +0000 |
| commit | 0c52374a3d9aba02a0743892767678491710a367 (patch) | |
| tree | d887768461d93eef6c56a649888b549dbc933f21 | |
| parent | 98755fd49362a0f9ae0f732b1575b484f75cf8d8 (diff) | |
| download | rockbox-0c52374a3d9aba02a0743892767678491710a367.zip rockbox-0c52374a3d9aba02a0743892767678491710a367.tar.gz rockbox-0c52374a3d9aba02a0743892767678491710a367.tar.bz2 rockbox-0c52374a3d9aba02a0743892767678491710a367.tar.xz | |
Plasma demo: (1) small speed optimisation. (2) Limit speed to 33fps. (3) Boost if running too slow on targets with variable CPU frequency.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23696 a1c6a512-1295-4272-9138-f99709370657
| -rw-r--r-- | apps/plugins/plasma.c | 36 |
1 files changed, 31 insertions, 5 deletions
diff --git a/apps/plugins/plasma.c b/apps/plugins/plasma.c index 450b09f..aadeb18 100644 --- a/apps/plugins/plasma.c +++ b/apps/plugins/plasma.c @@ -53,6 +53,9 @@ static size_t gbuf_size = 0; #endif static unsigned char sp1, sp2, sp3, sp4; /* Speed of plasma */ static int plasma_frequency; +#ifdef HAVE_ADJUSTABLE_CPU_FREQ +static bool boosted = false; +#endif /* Key assignement, all bitmapped models */ #if (CONFIG_KEYPAD == IPOD_4G_PAD) || (CONFIG_KEYPAD == IPOD_3G_PAD) || \ @@ -260,6 +263,10 @@ void cleanup(void *parameter) { (void)parameter; +#ifdef HAVE_ADJUSTABLE_CPU_FREQ + if (boosted) + rb->cpu_boost(false); +#endif #ifndef HAVE_LCD_COLOR grey_release(); #endif @@ -275,8 +282,12 @@ void cleanup(void *parameter) int main(void) { plasma_frequency = 1; - int button, x, y; - unsigned char p1,p2,p3,p4,t1,t2,t3,t4, z; + int button, delay, x, y; + unsigned char p1,p2,p3,p4,t1,t2,t3,t4, z,z0; + long last_tick = *rb->current_tick; +#ifdef HAVE_ADJUSTABLE_CPU_FREQ + int cumulated_lag = 0; +#endif #ifdef HAVE_LCD_COLOR #if defined(HAVE_LCD_MODES) && (HAVE_LCD_MODES & LCD_MODE_PAL256) unsigned char *ptr; @@ -325,10 +336,10 @@ int main(void) { t3=p3; t4=p4; + z0 = wave_array[t1] + wave_array[t2]; for(x = 0; x < LCD_WIDTH; ++x) { - z = wave_array[t1] + wave_array[t2] + wave_array[t3] - + wave_array[t4]; + z = z0 + wave_array[t3] + wave_array[t4]; #if defined(HAVE_LCD_MODES) && (HAVE_LCD_MODES & LCD_MODE_PAL256) *ptr++ = z; #else @@ -356,7 +367,22 @@ int main(void) grey_ub_gray_bitmap(greybuffer, 0, 0, LCD_WIDTH, LCD_HEIGHT); #endif - button = rb->button_get(false); + delay = last_tick - *rb->current_tick + HZ/33; +#ifdef HAVE_ADJUSTABLE_CPU_FREQ + if (!boosted && delay < 0) + { + cumulated_lag -= delay; /* proportional increase */ + if (cumulated_lag >= HZ) + rb->cpu_boost(boosted = true); + } + else if (boosted && delay > 1) /* account for jitter */ + { + if (--cumulated_lag <= 0) /* slow decrease */ + rb->cpu_boost(boosted = false); + } +#endif + button = rb->button_get_w_tmo(MAX(0, delay)); + last_tick = *rb->current_tick; switch(button) { |