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#ifndef CHECK_AUDIO_H
#define CHECK_AUDIO_H
#include <stdio.h>
#include <stdbool.h>
#include <unistd.h>
/* Only check once every 60 calls, so this can be called every frame
* without much penalty */
#define AUDIO_CHECK_THROTTLE 60
bool found_usb_audio = false;
bool has_usb_audio = false;
/* Every AUDIO_CHECK_THROTTLE calls, check to see if the USB audio
* device has been plugged or unplugged. When the status changes,
* calls `reinit_callback` with the new status. */
void audio_hotplug_check(void (*reinit_callback)(bool has_usb_audio)) {
static int count;
if (++count < AUDIO_CHECK_THROTTLE) return;
count = 0;
if (access("/dev/dsp1", R_OK | W_OK) == 0) {
found_usb_audio = true;
} else {
found_usb_audio = false;
}
if (!has_usb_audio && found_usb_audio) {
has_usb_audio = true;
reinit_callback(true);
} else if (has_usb_audio && !found_usb_audio) {
has_usb_audio = false;
reinit_callback(false);
}
}
/* For SDL apps, set audio to the correct device. */
void audio_hotplug_set_device(bool has_usb_audio) {
if (has_usb_audio) {
SDL_putenv("AUDIODEV=/dev/dsp1");
} else {
SDL_putenv("AUDIODEV=/dev/dsp");
}
}
#endif
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