private void openToolStripMenuItem_Click(object sender, EventArgs e)
{
openFileDialog1.Filter = "Wave file|*.wav|Any file|*.*";
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
try
{
mWaveFile = new WaveFile(openFileDialog1.FileName);
wavePanel.WaveFile = mWaveFile;
toolStripStatusLabel1.Text = mWaveFile.Label;
playToolStripMenuItem.Enabled = true;
WaveStream S = new WaveStream(openFileDialog1.FileName);
if (S.Length <= 0)
{
throw new Exception("Invalid WAV file");
}
mFormat = S.Format;
if (mFormat.wFormatTag != (short)WaveFmts.Pcm && mFormat.wFormatTag != (short)WaveFmts.Float)
{
throw new Exception("Olny PCM files are supported");
}
mAudioStream = S;
}
catch (Exception x)
{
MessageBox.Show(x.Message, "Error opening file", MessageBoxButtons.OK);
}
}
}
private void ReadHeader()
{
BinaryReader Reader = new BinaryReader(m_Stream);
if (ReadChunk(Reader) != "RIFF")
{
throw new Exception("Invalid file format");
}
Reader.ReadInt32(); // File length minus first 8 bytes of RIFF description, we don't use it
if (ReadChunk(Reader) != "WAVE")
{
throw new Exception("Invalid file format");
}
if (ReadChunk(Reader) != "fmt ")
{
throw new Exception("Invalid file format");
}
int len = Reader.ReadInt32();
if (len < 16) // bad format chunk length
{
throw new Exception("Invalid file format");
}
m_Format = new WaveFmt(22050, 16, 2); // initialize to any format
m_Format.wFormatTag = Reader.ReadInt16();
m_Format.nChannels = Reader.ReadInt16();
m_Format.nSamplesPerSec = Reader.ReadInt32();
m_Format.nAvgBytesPerSec = Reader.ReadInt32();
m_Format.nBlockAlign = Reader.ReadInt16();
m_Format.wBitsPerSample = Reader.ReadInt16();
// advance in the stream to skip the wave format block
len -= 16; // minimum format size
while (len > 0)
{
Reader.ReadByte();
len--;
}
// assume the data chunk is aligned
while (m_Stream.Position < m_Stream.Length && ReadChunk(Reader) != "data")
{
;
}
if (m_Stream.Position >= m_Stream.Length)
{
throw new Exception("Invalid file format");
}
m_Length = Reader.ReadInt32();
m_DataPos = m_Stream.Position;
Position = 0;
}
public WaveOutPlayer(int device, WaveFmt format, int bufferSize, int bufferCount, BufferFillEventHandler fillProc)
{
m_zero = format.wBitsPerSample == 8 ? (byte)128 : (byte)0;
m_FillProc = fillProc;
WaveOutHelper.Try(WaveNative.waveOutOpen(out m_WaveOut, device, format, m_BufferProc, 0, WaveNative.CALLBACK_FUNCTION));
AllocateBuffers(bufferSize, bufferCount);
m_Thread = new Thread(new ThreadStart(ThreadProc));
m_Thread.Start();
}
public static extern int waveOutOpen(out IntPtr hWaveOut, int uDeviceID, WaveFmt lpFormat, WaveDelegate dwCallback, int dwInstance, int dwFlags);
