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 WaveFormat(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 WaveInRecorder(int device, WaveFormat format, int bufferSize, int bufferCount, BufferDoneEventHandler doneProc)
{
m_DoneProc = doneProc;
WaveInHelper.Try(WaveNative.waveInOpen(out m_WaveIn, device, format, m_BufferProc, IntPtr.Zero, WaveNative.CALLBACK_FUNCTION));
AllocateBuffers(bufferSize, bufferCount);
for (int i = 0; i < bufferCount; i++)
{
SelectNextBuffer();
m_CurrentBuffer.Record();
}
WaveInHelper.Try(WaveNative.waveInStart(m_WaveIn));
m_Thread = new Thread(new ThreadStart(ThreadProc));
m_Thread.Start();
}
/// <summary>Write a new header</summary>
public static Stream CreateStream(Stream waveData, WaveFormat format) {
MemoryStream stream = new MemoryStream();
BinaryWriter writer = new BinaryWriter(stream);
writer.Write(System.Text.Encoding.ASCII.GetBytes("RIFF".ToCharArray()));
writer.Write((Int32)(waveData.Length + 36)); //File length minus first 8 bytes of RIFF description
writer.Write(System.Text.Encoding.ASCII.GetBytes("WAVEfmt ".ToCharArray()));
writer.Write((Int32)16); //length of following chunk: 16
writer.Write((Int16)format.wFormatTag);
writer.Write((Int16)format.nChannels);
writer.Write((Int32)format.nSamplesPerSec);
writer.Write((Int32)format.nAvgBytesPerSec);
writer.Write((Int16)format.nBlockAlign);
writer.Write((Int16)format.wBitsPerSample);
writer.Write(System.Text.Encoding.ASCII.GetBytes("data".ToCharArray()));
writer.Write((Int32)waveData.Length);
waveData.Seek(0, SeekOrigin.Begin);
byte[] b = new byte[waveData.Length];
waveData.Read(b, 0, (int)waveData.Length);
writer.Write(b);
writer.Seek(0, SeekOrigin.Begin);
return stream;
}
/// <summary>ReadHeader() - Changed to CopyHeader(destination)</summary>
private void CopyHeader(Stream destinationStream)
{
BinaryReader reader = new BinaryReader(m_Stream);
BinaryWriter writer = new BinaryWriter(destinationStream);
if (CopyChunk(reader, writer) != "RIFF")
throw new Exception("Invalid file format");
writer.Write( reader.ReadInt32() ); // File length minus first 8 bytes of RIFF description
if (CopyChunk(reader, writer) != "WAVE")
throw new Exception("Invalid file format");
if (CopyChunk(reader, writer) != "fmt ")
throw new Exception("Invalid file format");
int len = reader.ReadInt32();
if (len < 16){ // bad format chunk length
throw new Exception("Invalid file format");
}else{
writer.Write(len);
}
m_Format = new WaveFormat(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();
//copy format information
writer.Write( m_Format.wFormatTag );
writer.Write( m_Format.nChannels );
writer.Write( m_Format.nSamplesPerSec );
writer.Write( m_Format.nAvgBytesPerSec );
writer.Write( m_Format.nBlockAlign );
writer.Write( m_Format.wBitsPerSample );
// advance in the stream to skip the wave format block
len -= 16; // minimum format size
writer.Write( reader.ReadBytes(len) );
len = 0;
/*while (len > 0)
{
reader.ReadByte();
len--;
}*/
// assume the data chunk is aligned
while(m_Stream.Position < m_Stream.Length && CopyChunk(reader, writer) != "data")
;
if (m_Stream.Position >= m_Stream.Length)
throw new Exception("Invalid file format");
m_Length = reader.ReadInt32();
writer.Write( m_Length );
m_DataPos = m_Stream.Position;
Position = 0;
}
private void Start()
{
Stop();
try
{
_waveFormat = new WaveFormat(Properties.Settings.Default.SettingSamplesPerSecond, Properties.Settings.Default.SettingBitsPerSample, Properties.Settings.Default.SettingChannels);
_recorder = new WaveInRecorder(Properties.Settings.Default.SettingAudioInputDevice, _waveFormat, Properties.Settings.Default.SettingBytesPerFrame * Properties.Settings.Default.SettingChannels, 3, new BufferDoneEventHandler(DataArrived));
if (_isPlayer == true)
_player = new WaveOutPlayer(Properties.Settings.Default.SettingAudioOutputDevice, _waveFormat, Properties.Settings.Default.SettingBytesPerFrame * Properties.Settings.Default.SettingChannels, 3, new BufferFillEventHandler(Filler));
textBoxConsole.AppendText(DateTime.Now.ToString() + " : Audio input device polling started\r\n");
textBoxConsole.AppendText(DateTime.Now + " : Device = " + Properties.Settings.Default.SettingAudioInputDevice.ToString() + "\r\n");
textBoxConsole.AppendText(DateTime.Now + " : Channels = " + Properties.Settings.Default.SettingChannels.ToString() + "\r\n");
textBoxConsole.AppendText(DateTime.Now + " : Bits per sample = " + Properties.Settings.Default.SettingBitsPerSample.ToString() + "\r\n");
textBoxConsole.AppendText(DateTime.Now + " : Samples per second = " + Properties.Settings.Default.SettingSamplesPerSecond.ToString() + "\r\n");
textBoxConsole.AppendText(DateTime.Now + " : Frame size = " + Properties.Settings.Default.SettingBytesPerFrame.ToString() + "\r\n");
_audioFrame.sampleMessageTextLabel = sampleMessageTextLabel;
_audioFrame.interactLabel = interactLabel;
_audioFrame.neuralOutputLabel = neuralOutputlabel;
AudioFrame.sampleNameTextBox = sampleNameTextBox;
}
catch (Exception ex)
{
textBoxConsole.AppendText(DateTime.Now + " : " + ex.InnerException.ToString() + "\r\n");
}
}
public WaveOutPlayer(int device, WaveFormat 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, IntPtr.Zero, 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, WaveFormat lpFormat, WaveDelegate dwCallback, IntPtr dwInstance, int dwFlags);
public static extern int waveOutOpen(out IntPtr hWaveOut, int uDeviceID, WaveFormat lpFormat, WaveDelegate dwCallback, IntPtr dwInstance, int dwFlags);
