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, 0, 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(); }
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 static extern int waveOutOpen(out IntPtr hWaveOut, int uDeviceID, WaveFormat lpFormat, WaveDelegate dwCallback, int dwInstance, int dwFlags);