/// <summary>
/// 初始化BassEngine
/// </summary>
private void Initialize(DeviceInfo? device = null)
{
positionTimer.Interval = TimeSpan.FromMilliseconds(50);
positionTimer.Tick += positionTimer_Tick;
IsPlaying = false;
IntPtr handle = IntPtr.Zero;
if (Application.Current.MainWindow != null)
{
handle = new WindowInteropHelper(Application.Current.MainWindow).EnsureHandle();
}
int deviceNO = FindDevice(device, true);
if (!Un4seen.Bass.Bass.BASS_Init(deviceNO, sampleFrequency, Un4seen.Bass.BASSInit.BASS_DEVICE_DEFAULT, handle))
{
var error = Un4seen.Bass.Bass.BASS_ErrorGetCode();
int count = Un4seen.Bass.Bass.BASS_GetDeviceCount();
for (deviceNO = -1; deviceNO < count; ++deviceNO)
{
if (deviceNO != 0 && Un4seen.Bass.Bass.BASS_Init(deviceNO, sampleFrequency, Un4seen.Bass.BASSInit.BASS_DEVICE_DEFAULT, handle))
{
break;
}
}
if (deviceNO == count)
{
throw new BassInitializationFailureException(error);
}
}
if (device == null && deviceNO == FindDefaultDevice())
{
Device = null;
}
else
{
var info = Un4seen.Bass.Bass.BASS_GetDeviceInfo(Un4seen.Bass.Bass.BASS_GetDevice());
Device = new DeviceInfo { Driver = info.driver, Name = info.name, ID = info.id };
}
Un4seen.Bass.Bass.BASS_SetConfig(Un4seen.Bass.BASSConfig.BASS_CONFIG_NET_TIMEOUT, 15000);
}
/// <summary>
/// 查找设备的序号
/// </summary>
/// <param name="device">要查找的设备</param>
/// <param name="returnDefault">当找不到设备时，是否返回默认设备的序号</param>
/// <returns></returns>
private static int FindDevice(DeviceInfo? device, bool returnDefault = false)
{
if (device.HasValue)
{
int deviceNO = -1;
var devices = Un4seen.Bass.Bass.BASS_GetDeviceInfos();
var filteredDevices = from d in devices where d.id != null && d.id == device.Value.ID select Array.IndexOf(devices, d);
if (filteredDevices.Count() == 1)
{
deviceNO = filteredDevices.First();
}
if (deviceNO == -1)
{
filteredDevices = from d in devices where d.name == device.Value.Name select Array.IndexOf(devices, d);
if (filteredDevices.Count() == 1)
{
deviceNO = filteredDevices.First();
}
}
if (deviceNO == -1)
{
filteredDevices = from d in devices where d.driver == device.Value.Driver select Array.IndexOf(devices, d);
if (filteredDevices.Count() == 1)
{
deviceNO = filteredDevices.First();
}
}
if (deviceNO == -1 && returnDefault)
{
return FindDefaultDevice();
}
else if (deviceNO != -1)
{
return deviceNO;
}
else
{
throw new Exception("找不到此设备：" + device.Value.Name);
}
}
else
{
return FindDefaultDevice();
}
}
/// <summary>
/// 更换设备
/// </summary>
public void ChangeDevice(DeviceInfo? device)
{
int deviceNO = FindDevice(device);
int oldDeviceNO = Un4seen.Bass.Bass.BASS_GetDevice();
if (oldDeviceNO != deviceNO)
{
if (!Un4seen.Bass.Bass.BASS_GetDeviceInfo(deviceNO).IsInitialized)
{
IntPtr handle = IntPtr.Zero;
if (Application.Current.MainWindow != null)
{
handle = new WindowInteropHelper(Application.Current.MainWindow).EnsureHandle();
}
if (!Un4seen.Bass.Bass.BASS_Init(deviceNO, sampleFrequency, Un4seen.Bass.BASSInit.BASS_DEVICE_DEFAULT, handle))
{
throw new Exception(Un4seen.Bass.Bass.BASS_ErrorGetCode().ToString());
}
}
if (activeStreamHandle != 0)
{
if (!Un4seen.Bass.Bass.BASS_ChannelSetDevice(activeStreamHandle, deviceNO))
{
throw new Exception(Un4seen.Bass.Bass.BASS_ErrorGetCode().ToString());
}
}
if (!Un4seen.Bass.Bass.BASS_SetDevice(oldDeviceNO))
{
throw new Exception(Un4seen.Bass.Bass.BASS_ErrorGetCode().ToString());
}
if (!Un4seen.Bass.Bass.BASS_Free())
{
throw new Exception(Un4seen.Bass.Bass.BASS_ErrorGetCode().ToString());
}
if (!Un4seen.Bass.Bass.BASS_SetDevice(deviceNO))
{
throw new Exception(Un4seen.Bass.Bass.BASS_ErrorGetCode().ToString());
}
}
Device = device;
}
/// <summary>
/// 显式初始化
/// </summary>
public static void ExplicitInitialize(DeviceInfo? deviceInfo = null)
{
if (instance == null)
instance = new BassEngine(deviceInfo);
}
private BassEngine(DeviceInfo? deviceInfo = null)
{
Initialize(deviceInfo);
//设置播放结束的回调
endTrackSyncProc = EndTrack;
}
/// <summary>
/// 初始化BassEngine
/// </summary>
private void Initialize(DeviceInfo? device = null)
{
positionTimer.Interval = TimeSpan.FromSeconds(double.Parse(ConfigurationManager.AppSettings["Bass.ChannelPositionRefreshRate"]));
positionTimer.Tick += positionTimer_Tick;
IsPlaying = false;
IntPtr handle = IntPtr.Zero;
if (Application.Current.MainWindow != null)
{
handle = new WindowInteropHelper(Application.Current.MainWindow).EnsureHandle();
}
int deviceNO = FindDevice(device, true);
if (!Un4seen.Bass.Bass.BASS_Init(deviceNO, sampleFrequency, initFlags, handle))
{
var error = Un4seen.Bass.Bass.BASS_ErrorGetCode();
int count = Un4seen.Bass.Bass.BASS_GetDeviceCount();
for (deviceNO = -1; deviceNO < count; ++deviceNO)
{
if (deviceNO != 0 && Un4seen.Bass.Bass.BASS_Init(deviceNO, sampleFrequency, initFlags, handle))
{
break;
}
}
if (deviceNO == count)
{
throw new BassInitializationFailureException(error);
}
}
if (device == null && deviceNO == FindDefaultDevice())
{
Device = null;
}
else
{
var info = Un4seen.Bass.Bass.BASS_GetDeviceInfo(Un4seen.Bass.Bass.BASS_GetDevice());
Device = new DeviceInfo { Driver = info.driver, Name = info.name, ID = info.id };
}
}
