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slaudio: prevent suspend on macOS #317

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slaudio: prevent suspend on macOS #317

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2c20f1c
slaudio: prevent suspend on macOS
sreimers Sep 7, 2022
2f9a15b
use kIOPMAssertionTypeNoDisplaySleep
sreimers Sep 7, 2022
04ec4bd
fix comment
sreimers Sep 7, 2022
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18 changes: 18 additions & 0 deletions src/modules/slaudio/slaudio.c
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,9 @@
#ifdef WIN32
#include <windows.h>
#endif
#ifdef DARWIN
#include <IOKit/pwr_mgt/IOPMLib.h>
#endif
#include <webapp.h>

#define BUFFER_LEN 19200 /* max buffer_len = 192kHz*2ch*25ms*2frames */
Expand Down Expand Up @@ -1601,6 +1604,21 @@ static int slaudio_init(void)
/* Activate windows low latency timer */
timeBeginPeriod(1);
#endif

#ifdef DARWIN
/* Prevent DisplaySleep - usefull for backup applications
/* IOPMAssertionCreateWithName limits the string to 128 characters. */
CFStringRef reasonForActivity = CFSTR("Studio Link - Audio");
IOPMAssertionID assertionID;

if (kIOReturnSuccess ==
IOPMAssertionCreateWithName(
kIOPMAssertionTypeNoDisplaySleep, kIOPMAssertionLevelOn,
reasonForActivity, &assertionID))
warning("macOS suspend prevent active\n");
else
warning("macOS suspend prevent failed\n");
#endif
info("slaudio ready\n");

return err;
Expand Down