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FFT plugin: Some speed regulation for too-fast targets. (50FPS)

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26503 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2010-06-03 04:21:27 +00:00
parent 949d546fc8
commit 7e538995a5
1 changed files with 20 additions and 8 deletions
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28
apps/plugins/fft/fft.c
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@ -1294,7 +1294,7 @@ static void fft_close_fft(void)
* target uses IRAM */ * target uses IRAM */
static bool fft_have_fft(void) static bool fft_have_fft(void)
{ {
return fft_get_fft(); return rb->pcm_is_playing() && fft_get_fft();
} }
static inline void fft_free_fft_output(void) static inline void fft_free_fft_output(void)
@ -1355,6 +1355,9 @@ enum plugin_status plugin_start(const void* parameter)
while (run) while (run)
{ {
/* Unless otherwise specified, HZ/50 is around the window length
* and quite fast. We want to be done with drawing by this time. */
long next_frame_tick = *rb->current_tick + HZ/50;
int button; int button;
while (!fft_have_fft()) while (!fft_have_fft())
@ -1378,13 +1381,13 @@ enum plugin_status plugin_start(const void* parameter)
lcd_(update)(); lcd_(update)();
} }
timeout = HZ/100; timeout = HZ/100; /* 'till end of curent tick, don't use 100% CPU */
} }
/* Make sure the input thread has produced something before doing /* Make sure the FFT has produced something before doing anything
* anything but watching for buttons. Music might not be playing * but watching for buttons. Music might not be playing or things
* or things just aren't going well for picking up buffers so keys * just aren't going well for picking up buffers so keys are
* are scanned to avoid lockup. */ * scanned to avoid lockup. */
button = rb->button_get_w_tmo(timeout); button = rb->button_get_w_tmo(timeout);
if (button != BUTTON_NONE) if (button != BUTTON_NONE)
goto read_button; goto read_button;
@ -1394,9 +1397,18 @@ enum plugin_status plugin_start(const void* parameter)
fft_free_fft_output(); /* COP only */ fft_free_fft_output(); /* COP only */
rb->yield(); long tick = *rb->current_tick;
if(TIME_BEFORE(tick, next_frame_tick))
{
tick = next_frame_tick - tick;
}
else
{
rb->yield(); /* tmo = 0 won't yield */
tick = 0;
}
button = rb->button_get(false); button = rb->button_get_w_tmo(tick);
read_button: read_button:
switch (button) switch (button)
{ {