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Rewrote timer code.

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The new code is based on timestamps, rather than delays. This eliminates the
need to update every timer in timer_process(), which cost a non-trivial amount
of CPU time on low-end machines.

This involved changes to every user of the timer code, so this change almost
certainly introduces bugs.
This commit is contained in:
SarahW 2018-08-02 22:06:10 +01:00
commit a7d006b637
79 changed files with 1050 additions and 1033 deletions
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8
src/lpt_dss.c
View file

@ -12,7 +12,7 @@ typedef struct dss_t
uint8_t dac_val;
int time;
pc_timer_t timer;
int16_t buffer[MAXSOUNDBUFLEN];
int pos;
@ -29,8 +29,6 @@ static void dss_write_data(uint8_t val, void *p)
{
dss_t *dss = (dss_t *)p;
timer_clock();
if ((dss->write_idx - dss->read_idx) < 16)
{
dss->fifo[dss->write_idx & 15] = val;
@ -82,7 +80,7 @@ static void dss_callback(void *p)
dss->read_idx++;
}
dss->time += (TIMER_USEC * (1000000.0 / 7000.0));
timer_advance_u64(&dss->timer, (TIMER_USEC * (1000000.0 / 7000.0)));
}
static void *dss_init()
@ -91,7 +89,7 @@ static void *dss_init()
memset(dss, 0, sizeof(dss_t));
sound_add_handler(dss_get_buffer, dss);
timer_add(dss_callback, &dss->time, TIMER_ALWAYS_ENABLED, dss);
timer_add(&dss->timer, dss_callback, dss, 1);
return dss;
}