private void btnPlay_Click(object sender, EventArgs e)
{
updateTimer.Stop();
Bass.BASS_StreamFree(stream);
if (filename != string.Empty)
{
stream = Bass.BASS_StreamCreateFile(filename, 0, 0, BASSFlag.BASS_SAMPLE_FLOAT | BASSFlag.BASS_STREAM_PRESCAN);
if (stream != 0)
{
mslength = (int)Bass.BASS_ChannelSeconds2Bytes(stream, 0.03);
deviceLatencyBytes = (int)Bass.BASS_ChannelSeconds2Bytes(stream, deviceLatencyMS / 1000.0);
myDSPAddr = new DSPPROC(MyDSPGain);
Bass.BASS_ChannelSetDSP(stream, myDSPAddr, IntPtr.Zero, 2);
if (WF2 != null && WF2.IsRendered)
{
WF2.SyncPlayback(stream);
long cuein = WF2.GetMarker("CUE");
long cueout = WF2.GetMarker("END");
int cueinFrame = WF2.Position2Frames(cuein);
int cueoutFrame = WF2.Position2Frames(cueout);
if (cuein >= 0)
{
Bass.BASS_ChannelSetPosition(stream, cuein);
}
if (cueout >= 0)
{
Bass.BASS_ChannelRemoveSync(stream, syncer);
syncer = Bass.BASS_ChannelSetSync(stream, BASSSync.BASS_SYNC_POS, cueout, sync, IntPtr.Zero);
}
}
}
if (stream != 0 && Bass.BASS_ChannelPlay(stream, false))
{
textBox1.Text = "";
updateTimer.Start();
BASS_CHANNELINFO info = new BASS_CHANNELINFO();
Bass.BASS_ChannelGetInfo(stream, info);
textBox1.Text += "Info: " + info.ToString() + Environment.NewLine;
TAG_INFO tagInfo = new TAG_INFO();
if (BassTags.BASS_TAG_GetFromFile(stream, tagInfo))
{
textBoxAlbum.Text = tagInfo.album;
textBoxArtist.Text = tagInfo.artist;
textBoxTitle.Text = tagInfo.title;
textBoxComment.Text = tagInfo.comment;
textBoxGenre.Text = tagInfo.genre;
textBoxYear.Text = tagInfo.year;
textBoxTrack.Text = tagInfo.track;
}
btnStop.Enabled = true;
btnPlay.Enabled = false;
}
}
}
private void DrawWavePosition(long pos, long len)
{
if (_WF == null || len == 0 || pos < 0)
{
this.pictureBoxWaveForm.Image = null;
return;
}
Bitmap bitmap = null;
Graphics g = null;
Pen p = null;
double bpp = 0;
try
{
if (_zoomed)
{
// total length doesn't have to be _zoomDistance sec. here
len = _WF.Frame2Bytes(_zoomEnd) - _zoomStartBytes;
int scrollOffset = 10; // 10*20ms = 200ms.
// if we scroll out the window...(scrollOffset*20ms before the zoom window ends)
if (pos > (_zoomStartBytes + len - scrollOffset * _WF.Wave.bpf))
{
// we 'scroll' our zoom with a little offset
_zoomStart = _WF.Position2Frames(pos - scrollOffset * _WF.Wave.bpf);
_zoomStartBytes = _WF.Frame2Bytes(_zoomStart);
_zoomEnd = _zoomStart + _WF.Position2Frames(_zoomDistance) - 1;
if (_zoomEnd >= _WF.Wave.data.Length)
{
// beyond the end, so we zoom from end - _zoomDistance.
_zoomEnd = _WF.Wave.data.Length - 1;
_zoomStart = _zoomEnd - _WF.Position2Frames(_zoomDistance) + 1;
if (_zoomStart < 0)
{
_zoomStart = 0;
}
_zoomStartBytes = _WF.Frame2Bytes(_zoomStart);
// total length doesn't have to be _zoomDistance sec. here
len = _WF.Frame2Bytes(_zoomEnd) - _zoomStartBytes;
}
// get the new wave image for the new zoom window
DrawWave();
}
// zoomed: starts with _zoomStartBytes and is _zoomDistance long
pos -= _zoomStartBytes; // offset of the zoomed window
bpp = len / (double)this.pictureBoxWaveForm.Width; // bytes per pixel
}
else
{
// not zoomed: width = length of stream
bpp = len / (double)this.pictureBoxWaveForm.Width; // bytes per pixel
}
p = new Pen(Color.Red);
bitmap = new Bitmap(this.pictureBoxWaveForm.Width, this.pictureBoxWaveForm.Height);
g = Graphics.FromImage(bitmap);
g.Clear(Color.Black);
int x = (int)Math.Round(pos / bpp); // position (x) where to draw the line
g.DrawLine(p, x, 0, x, this.pictureBoxWaveForm.Height - 1);
bitmap.MakeTransparent(Color.Black);
}
catch
{
bitmap = null;
}
finally
{
// clean up graphics resources
if (p != null)
{
p.Dispose();
}
if (g != null)
{
g.Dispose();
}
}
this.pictureBoxWaveForm.Image = bitmap;
}
