/// <summary>
/// Beatの検出位置をListで返す
/// </summary>
/// <returns>Beat検出位置群</returns>
public List <stBeatPos> GetBeatPositions()
{
#region [ BeatPosition格納リストの初期化 ]
if (this.listBeatPositions != null)
{
this.listBeatPositions.Clear();
}
else
{
this.listBeatPositions = new List <stBeatPos>();
}
#endregion
BPMBEATPROC _beatProc = new BPMBEATPROC(GetBeat_ProgressCallback);
bool ret = BassFx.BASS_FX_BPM_BeatDecodeGet(
this.hBassStream,
0,
nTotalSeconds,
//0,
BASSFXBpm.BASS_FX_BPM_DEFAULT, //BASSFXBpm.BASS_FX_BPM_MULT2,
_beatProc,
IntPtr.Zero);
return(this.listBeatPositions);
}
private void ClearUp()
{
if (this.FChannel != null)
{
if (this.FChannel.BassHandle.HasValue)
{
_beatProc = new BPMBEATPROC(MyBeatProc);
BassFx.BASS_FX_BPM_BeatFree(this.FChannel.BassHandle.Value);
}
}
}
private void Scan()
{
long pos = Bass.BASS_ChannelGetLength(this.handle);
this.len = Bass.BASS_ChannelBytes2Seconds(this.handle, pos);
_beatProc = new BPMBEATPROC(MyBeatProc);
BassFx.BASS_FX_BPM_BeatCallbackSet(this.handle, _beatProc, IntPtr.Zero);
BassFx.BASS_FX_BPM_BeatSetParameters(this.handle, this.parameters.Width, this.parameters.Center, this.parameters.Release);
BassFx.BASS_FX_BPM_BeatDecodeGet(this.handle, 0.0, this.len, BASSFXBpm.BASS_FX_BPM_BKGRND, _beatProc, IntPtr.Zero);
Bass.BASS_StreamFree(this.handle);
if (OnComplete != null)
{
OnComplete(this.parameters.Index);
}
}
private void Setup()
{
if (this.FChannel != null)
{
if (this.FChannel.BassHandle.HasValue)
{
_beatProc = new BPMBEATPROC(MyBeatProc);
BassFx.BASS_FX_BPM_BeatCallbackSet(this.FChannel.BassHandle.Value, _beatProc, IntPtr.Zero);
double band, center, release;
this.FPinInBandWidth.GetValue(0, out band);
this.FPinInCenter.GetValue(0, out center);
this.FPinInRelease.GetValue(0, out release);
BassFx.BASS_FX_BPM_BeatSetParameters(this.FChannel.BassHandle.Value, (float)band, (float)center, (float)release);
}
}
}
private void buttonPlay_Click(object sender, System.EventArgs e)
{
this.checkBoxSwap.Checked = false;
this.checkBoxFlanger.Checked = false;
this.checkBoxEcho.Checked = false;
Bass.BASS_StreamFree(_StreamFX);
if (_FileName != String.Empty)
{
// create the decoding stream
_Stream = Bass.BASS_StreamCreateFile(_FileName, 0, 0, BASSFlag.BASS_STREAM_DECODE | BASSFlag.BASS_SAMPLE_FLOAT | BASSFlag.BASS_STREAM_PRESCAN);
if (_Stream != 0)
{
_20mslength = (int)Bass.BASS_ChannelSeconds2Bytes(_Stream, 0.02f); // 20ms window
// and start to get the BPM...BEFORE! playing
bpmProc = new BPMPROCESSPROC(MyBPMProc);
float bpm = BassFx.BASS_FX_BPM_DecodeGet(_Stream, 1f, 180f, Utils.MakeLong(50, 180), BASSFXBpm.BASS_FX_BPM_BKGRND | BASSFXBpm.BASS_FX_FREESOURCE | BASSFXBpm.BASS_FX_BPM_MULT2, bpmProc, IntPtr.Zero);
this.labelBPM.Text = String.Format("BPM={0}", bpm);
// and set the position back...so that we hear the playback from the beginning...
// never get the BPM from '_Stream' while playing...this will steel the data from the decoding channel
Bass.BASS_ChannelSetPosition(_Stream, 0);
// now we create a Tempo channel...the actual playing channel
_StreamFX = BassFx.BASS_FX_TempoCreate(_Stream, BASSFlag.BASS_FX_FREESOURCE | BASSFlag.BASS_SAMPLE_FLOAT | BASSFlag.BASS_SAMPLE_LOOP);
}
if (_StreamFX != 0 && Bass.BASS_ChannelPlay(_StreamFX, false))
{
this.timerUpdate.Start();
// real-time beat position
beatProc = new BPMBEATPROC(MyBeatProc);
BassFx.BASS_FX_BPM_BeatCallbackSet(_StreamFX, beatProc, IntPtr.Zero);
}
else
{
Console.WriteLine("Error = {0}", Bass.BASS_ErrorGetCode());
}
}
}
public void Start(int deviceId)
{
Thread backgroundThread = new Thread(() =>
{
try
{
_threadDispatcher = Dispatcher.CurrentDispatcher;
_threadDispatcher.BeginInvoke(new Action(() =>
{
// Wasapi only works on Vista, 7 and the likes
if (HasWasapi)
{
InitWasapi(deviceId);
}
else
{
Bass.BASS_SetConfig(BASSConfig.BASS_CONFIG_UPDATEPERIOD, 0);
Bass.BASS_Init(0, 44100, BASSInit.BASS_DEVICE_DEFAULT, IntPtr.Zero);
InitBassapi(deviceId);
}
_bpmBeatProc = new BPMBEATPROC(BpmBeatProc);
BassFx.BASS_FX_BPM_BeatCallbackSet(_recordChan, _bpmBeatProc, IntPtr.Zero);
}
));
Dispatcher.Run();
}
catch (Exception e)
{
App.ReportException(e);
}
});
backgroundThread.IsBackground = true;
backgroundThread.SetApartmentState(ApartmentState.STA);
backgroundThread.Priority = ThreadPriority.BelowNormal;
backgroundThread.Start();
}
public static extern bool BASS_FX_BPM_BeatCallbackSet(int handle, BPMBEATPROC proc, IntPtr user);
public static extern bool BASS_FX_BPM_BeatDecodeGet(int channel, double startSec, double endSec, BASSFXBpm flags, BPMBEATPROC proc, IntPtr user);
public static extern bool BASS_FX_BPM_BeatDecodeGet(int channel, double startSec, double endSec, BASSFXBpm flags, BPMBEATPROC proc, IntPtr user);
public static extern bool BASS_FX_BPM_BeatCallbackSet(int handle, BPMBEATPROC proc, IntPtr user);
public static void BPM_BeatCallbackSet(int handle, BPMBEATPROC proc, IntPtr user)
{
if(!BassFx.BASS_FX_BPM_BeatCallbackSet(handle, proc, user))
Base.CheckForError();
}
