CallbackDeviceTracker.java

com.mojang.blaze3d.audio.CallbackDeviceTracker

信息

• 全限定名：com.mojang.blaze3d.audio.CallbackDeviceTracker
• 类型：public class
• 包：com.mojang.blaze3d.audio
• 源码路径：src/main/java/com/mojang/blaze3d/audio/CallbackDeviceTracker.java
• 起始行号：L14
• 继承：AbstractDeviceTracker
• 职责：

  TODO

字段/常量

• LOGGER

  • 类型: Logger
  • 修饰符: private static final
  • 源码定位: L15
  • 说明:

    TODO

• updateRequested

  • 类型: boolean
  • 修饰符: private volatile
  • 源码定位: L16
  • 说明:

    TODO

• SUBSCRIBED_EVENT_TYPES

  • 类型: int[]
  • 修饰符: private static final
  • 源码定位: L17
  • 说明:

    TODO

• HEX_FORMAT

  • 类型: HexFormat
  • 修饰符: public static final
  • 源码定位: L18
  • 说明:

    TODO

内部类/嵌套类型

• 无

构造器

public CallbackDeviceTracker(DeviceList deviceList) @ L20

• 构造器名：CallbackDeviceTracker
• 源码定位：L20
• 修饰符：public

参数:

• deviceList: DeviceList

说明:

TODO

方法

下面的方法块按源码顺序生成。

protected boolean isUpdateRequested() @ L24

• 方法名：isUpdateRequested
• 源码定位：L24
• 返回类型：boolean
• 修饰符：protected

参数:

• 无

说明:

TODO

protected void discardUpdateRequest() @ L29

• 方法名：discardUpdateRequest
• 源码定位：L29
• 返回类型：void
• 修饰符：protected

参数:

• 无

说明:

TODO

public static boolean isSupported() @ L34

• 方法名：isSupported
• 源码定位：L34
• 返回类型：boolean
• 修饰符：public static

参数:

• 无

说明:

TODO

public static CallbackDeviceTracker createAndInstall(DeviceList deviceList) @ L44

• 方法名：createAndInstall
• 源码定位：L44
• 返回类型：CallbackDeviceTracker
• 修饰符：public static

参数:

• deviceList: DeviceList

说明:

TODO

private SOFTSystemEventProcI createCallback() @ L51

• 方法名：createCallback
• 源码定位：L51
• 返回类型：SOFTSystemEventProcI
• 修饰符：private

参数:

• 无

说明:

TODO

private static boolean isSupportedForPlaybackDevice(int eventType) @ L72

• 方法名：isSupportedForPlaybackDevice
• 源码定位：L72
• 返回类型：boolean
• 修饰符：private static

参数:

• eventType: int

说明:

TODO

private static String deviceTypeToString(int deviceType) @ L83

• 方法名：deviceTypeToString
• 源码定位：L83
• 返回类型：String
• 修饰符：private static

参数:

• deviceType: int

说明:

TODO

代码

@OnlyIn(Dist.CLIENT)
public class CallbackDeviceTracker extends AbstractDeviceTracker {
    private static final Logger LOGGER = LogUtils.getLogger();
    private volatile boolean updateRequested;
    private static final int[] SUBSCRIBED_EVENT_TYPES = new int[]{6614, 6615, 6616};
    public static final HexFormat HEX_FORMAT = HexFormat.of();
 
    public CallbackDeviceTracker(DeviceList deviceList) {
        super(deviceList);
    }
 
    @Override
    protected boolean isUpdateRequested() {
        return this.updateRequested;
    }
 
    @Override
    protected void discardUpdateRequest() {
        this.updateRequested = false;
    }
 
    public static boolean isSupported() {
        for (int eventType : SUBSCRIBED_EVENT_TYPES) {
            if (!isSupportedForPlaybackDevice(eventType)) {
                return false;
            }
        }
 
        return true;
    }
 
    public static CallbackDeviceTracker createAndInstall(DeviceList deviceList) {
        CallbackDeviceTracker result = new CallbackDeviceTracker(deviceList);
        SOFTSystemEvents.alcEventControlSOFT(SUBSCRIBED_EVENT_TYPES, true);
        SOFTSystemEvents.alcEventCallbackSOFT(result.createCallback(), 0L);
        return result;
    }
 
    private SOFTSystemEventProcI createCallback() {
        return (eventType, deviceType, device, messageLength, messagePtr, userParam) -> {
            String deviceTypeString = deviceTypeToString(deviceType);
            String message = MemoryUtil.memASCII(messagePtr, messageLength);
            switch (eventType) {
                case 6614:
                    LOGGER.debug("Default {} device changed: {}", deviceTypeString, message);
                    break;
                case 6615:
                    LOGGER.debug("Added new {} device: {}", deviceTypeString, message);
                    break;
                case 6616:
                    LOGGER.debug("Removed {} device: {}", deviceTypeString, message);
            }
 
            if (deviceType == 6612) {
                this.updateRequested = true;
            }
        };
    }
 
    private static boolean isSupportedForPlaybackDevice(int eventType) {
        int result = SOFTSystemEvents.alcEventIsSupportedSOFT(eventType, 6612);
        if (result == 0) {
            int error = ALC10.alcGetError(0L);
            LOGGER.warn("Failed to check event {}, error: {}", HEX_FORMAT.toHexDigits(eventType), HEX_FORMAT.toHexDigits(error));
            return false;
        } else {
            return result == 6617;
        }
    }
 
    private static String deviceTypeToString(int deviceType) {
        return switch (deviceType) {
            case 6612 -> "playback";
            case 6613 -> "capture";
            default -> "unknown (0x" + HEX_FORMAT.toHexDigits(deviceType) + ")";
        };
    }
}

引用的其他类

• AbstractDeviceTracker

  • 引用位置: 继承

• DeviceList

  • 引用位置: 参数