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overlay: Expose sampling period/frequency as a user parameter

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Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2013-08-24 10:00:36 +01:00
parent 09d9089ead
commit 68c63ddd36
1 changed files with 20 additions and 3 deletions
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23
overlay/overlay.c
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@ -708,6 +708,21 @@ static void signal_snapshot(int sig)
take_snapshot = sig; take_snapshot = sig;
} }
static int get_sample_period(struct config *config)
{
const char *value;
value = config_get_value(config, "sampling", "period");
if (value && atoi(value) > 0)
return atoi(value);
value = config_get_value(config, "sampling", "frequency");
if (value && atoi(value) > 0)
return 1000000 / atoi(value);
return 500000;
}
int main(int argc, char **argv) int main(int argc, char **argv)
{ {
static struct option long_options[] = { static struct option long_options[] = {
@ -718,7 +733,7 @@ int main(int argc, char **argv)
}; };
struct overlay_context ctx; struct overlay_context ctx;
struct config config; struct config config;
int index; int index, sample_period;
int i; int i;
config_init(&config); config_init(&config);
@ -760,10 +775,10 @@ int main(int argc, char **argv)
init_gpu_freq(&ctx, &ctx.gpu_freq); init_gpu_freq(&ctx, &ctx.gpu_freq);
init_gem_objects(&ctx, &ctx.gem_objects); init_gem_objects(&ctx, &ctx.gem_objects);
sample_period = get_sample_period(&config);
i = 0; i = 0;
while (1) { while (1) {
usleep(500*1000);
ctx.cr = cairo_create(ctx.surface); ctx.cr = cairo_create(ctx.surface);
cairo_set_operator(ctx.cr, CAIRO_OPERATOR_CLEAR); cairo_set_operator(ctx.cr, CAIRO_OPERATOR_CLEAR);
cairo_paint(ctx.cr); cairo_paint(ctx.cr);
@ -797,6 +812,8 @@ int main(int argc, char **argv)
cairo_surface_write_to_png(ctx.surface, buf); cairo_surface_write_to_png(ctx.surface, buf);
take_snapshot = 0; take_snapshot = 0;
} }
usleep(sample_period);
} }
return 0; return 0;