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Audio picker: always expose raw USB audio path for car-dash compatibility #80

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Merged
patrickrb merged 1 commit into from
May 29, 2026
Merged

Audio picker: always expose raw USB audio path for car-dash compatibility #80

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32 changes: 7 additions & 25 deletions ft8cn/app/src/main/java/com/bg7yoz/ft8cn/ui/AudioDeviceSpinnerAdapter.java
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Original file line number Diff line number Diff line change
Expand Up @@ -57,37 +57,19 @@ public void refreshDevices() {
}
}

// 2. Scan for USB Audio Class devices not recognized by AudioManager
// 2. Scan for USB Audio Class devices and list them as a separate "direct" entry.
// We intentionally do NOT dedupe against AudioManager-listed USB devices: on
// automotive Android skins the AudioManager entry routes through AudioRecord +
// setPreferredDevice(), which the in-car audio policy silently overrides back to
// the built-in mic. The raw USB path bypasses that policy entirely, so users on
// those systems need both entries visible and labeled distinctly.
try {
List<UsbAudioDevice.UsbAudioDeviceInfo> usbDevices =
UsbAudioDevice.findUsbAudioDevices(mContext);
for (UsbAudioDevice.UsbAudioDeviceInfo usbDev : usbDevices) {
boolean matchesDirection = isInput ? usbDev.hasInput : usbDev.hasOutput;
if (!matchesDirection) continue;

// Check if this device is already listed by AudioManager (by matching type)
boolean alreadyListed = false;
for (AudioDeviceInfo adi : audioDeviceList) {
if (adi.getType() == AudioDeviceInfo.TYPE_USB_DEVICE
|| adi.getType() == AudioDeviceInfo.TYPE_USB_ACCESSORY
|| adi.getType() == AudioDeviceInfo.TYPE_USB_HEADSET) {
// AudioManager already has a USB audio device — might be the same one
// Compare product name if available
String adName = adi.getProductName() != null
? adi.getProductName().toString() : "";
String usbName = usbDev.device.getProductName() != null
? usbDev.device.getProductName() : "";
if (!adName.isEmpty() && !usbName.isEmpty()
&& adName.equals(usbName)) {
alreadyListed = true;
break;
}
}
}

if (!alreadyListed) {
usbAudioDeviceList.add(usbDev);
}
usbAudioDeviceList.add(usbDev);
}
} catch (Exception e) {
// Ignore USB enumeration errors
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2 changes: 1 addition & 1 deletion ft8cn/app/src/main/java/com/bg7yoz/ft8cn/wave/UsbAudioDevice.java
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Original file line number Diff line number Diff line change
Expand Up @@ -573,7 +573,7 @@ public String getDisplayName() {
name = String.format("USB Audio [%04X:%04X]",
device.getVendorId(), device.getProductId());
}
return name + " (USB)";
return name + " (USB direct)";
}
}
}
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