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verbose and retry on file read

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This commit is contained in:
Alessandro Mauri 2026-08-10 15:30:07 +02:00
parent 36c4aff457
commit 56af20f4fe
1 changed files with 45 additions and 16 deletions
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61
ambientd.c3
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@ -200,13 +200,24 @@ macro float @bezier(float t)
// https://docs.kernel.org/admin-guide/abi-stable-files.html#abi-file-stable-sysfs-class-backlight
macro int @read_int_from_file(String path) => ((String)file::load_temp(path)[..^2]).to_int() ?? 0;
macro int? @read_int_from_file(String path) => ((String)file::load_temp(path)[..^2]).to_int();
macro void @write_int_to_file(String path, int i) => (void)file::save(path, string::tformat("%d\n", i));
macro int @get_luminance() => @read_int_from_file(light_sensor_path);
macro int @get_max_backlight() => @read_int_from_file(backlight_path.tconcat("/max_brightness"));
macro int @get_backlight() => @read_int_from_file(backlight_path.tconcat("/brightness"));
macro int? @get_luminance() => @read_int_from_file(light_sensor_path);
macro int? @get_max_backlight() => @read_int_from_file(backlight_path.tconcat("/max_brightness"));
macro int? @get_backlight() => @read_int_from_file(backlight_path.tconcat("/brightness"));
macro void @set_backlight(int v) => @write_int_to_file(backlight_path.tconcat("/brightness"), v);
macro bool @is_screen_on() => @read_int_from_file(backlight_path.tconcat("/bl_power")) == 0;
macro bool? @is_screen_on() => @read_int_from_file(backlight_path.tconcat("/bl_power")) == 0;
macro @retry_every(#f, int ms = 100)
{
const sz TRIES = 10;
for (sz i = 0; i < TRIES; i++) {
if (try x = #f) return x;
thread::sleep_ms(ms);
}
io::eprintfn("ERROR: tried to execute '%s' but it failed too many times (%d)", $stringify(#f), TRIES);
std::os::exit(1);
}
fn void sigusr1_handler(CInt sig, void* act, void* oldact)
@ -223,32 +234,50 @@ fn void sigusr1_handler(CInt sig, void* act, void* oldact)
// TODO: override config file with arguments
fn void main(String[] args)
{
bool verbose = false;
foreach (a : args[1..]) {
switch (a) {
case "-v":
verbose = true;
break;
case "-h":
io::printfn("ambientd [-hv]");
std::os::exit(0);
default:
io::eprintfn("Unrecognized argument: '%s'", a);
std::os::exit(1);
}
}
update_config();
posix::install_signal_handler(libc::SIGUSR1, &sigusr1_handler);
filter.init(@get_luminance());
float luminance_old = filter.update(@get_luminance(), 0.0);
int brightness_set = @get_backlight();
int _l = @get_luminance() ?? 0;
filter.init(_l);
float luminance_old = filter.update(_l, 0.0);
int brightness_set = @retry_every(@get_backlight());
int user_offset = 0;
int backlight_max = @get_max_backlight();
int backlight_max = @get_max_backlight() ?? 0;
Time start = time::now();
while (true) {
if (!@is_screen_on()) {
if (!@is_screen_on() ?? false) {
thread::sleep_ms(5000);
continue;
}
// Check user offset
user_offset = @retry_every(@get_backlight(), update_interval_ms/2) - brightness_set;
int _lx = @retry_every(@get_luminance(), update_interval_ms/2);
Time now = time::now();
Time dt = (Time)(now - start);
// Check user offset
user_offset = @get_backlight() - brightness_set;
// Filtered luminance, depends heavily on the type of sensor, for the CF-SV7
// seems to be in lux
float luminance = filter.update(@get_luminance(), (float)dt.to_seconds()) * light_sensor_k;
float luminance = filter.update(_lx, (float)dt.to_seconds()) * light_sensor_k;
// Percent of the luminance received compared to what the panel can output
float p = min((luminance/backlight_max_luminance), 1.0f);
@ -258,9 +287,9 @@ fn void main(String[] args)
// perceived luminance is non-linear, I think the inverse square law is correct
int new_brightness = (int)(math::pow(p*1.1f, 0.5f)*backlight_max);
brightness_set = new_brightness;
@set_backlight(brightness_set + user_offset);
@set_backlight(max(brightness_set + user_offset, 0));
// io::printfn("%f, %d, %d", luminance, brightness_set, user_offset);
if (verbose) io::printfn("%f, %d, %d", luminance, brightness_set, user_offset);
start = now;
thread::sleep_ms(update_interval_ms);