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WASAPI: get period duration for raw devices

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Andrew Kelley 2015-08-13 10:18:27 -07:00
parent 9a06d22608
commit e82c3e89da
3 changed files with 11 additions and 6 deletions
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2
README.md
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@ -251,8 +251,6 @@ view `coverage/index.html` in a browser.
0. implement WASAPI (Windows) backend, get examples working 0. implement WASAPI (Windows) backend, get examples working
- list devices - list devices
- raw mode
- period duration
- watching - watching
- sine wave - sine wave
- microphone - microphone

9
soundio/soundio.h
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@ -364,9 +364,12 @@ struct SoundIoDevice {
double buffer_duration_current; double buffer_duration_current;
// Period duration in seconds. After this much time passes, write_callback // Period duration in seconds. After this much time passes, write_callback
// is called. If values are unknown, they are set to 0.0. These values are // is called. If values are unknown, they are set to 0.0.
// meaningless for PulseAudio and CoreAudio. For JACK, buffer duration and // For PulseAudio and CoreAudio, these values are meaningless.
// period duration are the same. // For JACK, buffer duration and period duration are the same.
// For WASAPI, `period_duration_max` is unknown for raw devices, so a
// reasonable max of 4.0 is used. You may check that the current backend is
// WASAPI and ignore the max value for raw devices.
double period_duration_min; double period_duration_min;
double period_duration_max; double period_duration_max;
double period_duration_current; double period_duration_current;

6
src/wasapi.cpp
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@ -650,7 +650,11 @@ static int refresh_devices(SoundIoPrivate *si) {
return SoundIoErrorOpeningDevice; return SoundIoErrorOpeningDevice;
} }
rd.device_shared->period_duration_current = from_reference_time(default_device_period); rd.device_shared->period_duration_current = from_reference_time(default_device_period);
rd.device_shared->period_duration_min = from_reference_time(min_device_period); rd.device_shared->period_duration_min = rd.device_shared->period_duration_current;
rd.device_shared->period_duration_max = rd.device_shared->period_duration_current;
rd.device_raw->period_duration_min = from_reference_time(min_device_period);
rd.device_raw->period_duration_max = 4.0;
if (rd.endpoint) if (rd.endpoint)