/// 初期化関数
public WavePlay( int block_size, int sample_rate ) {
#if DEBUG
Console.WriteLine( "waveplay..ctor" );
#endif
s_block_size = block_size;
s_sample_rate = sample_rate;
//s_ptr_wave_formatx = Marshal.AllocHGlobal( sizeof( WAVEFORMATEX ) );
s_wave_formatx = new WAVEFORMATEX();
//Marshal.PtrToStructure( s_ptr_wave_formatx, s_wave_formatx );
s_wave_formatx.cbSize = (ushort)sizeof( WAVEFORMATEX );
#if DEBUG
Console.WriteLine( " s_wave_fomratx.cbSize=" + s_wave_formatx.cbSize );
Console.WriteLine( " sizeof( WAVEHDR )=" + sizeof( WAVEHDR ) );
#endif
s_wave_formatx.wFormatTag = win32.WAVE_FORMAT_PCM;
s_wave_formatx.nChannels = 2;
s_wave_formatx.wBitsPerSample = 16;
s_wave_formatx.nBlockAlign = (ushort)(s_wave_formatx.nChannels * s_wave_formatx.wBitsPerSample / 8);
s_wave_formatx.nSamplesPerSec = (uint)s_sample_rate;
s_wave_formatx.nAvgBytesPerSec = s_wave_formatx.nSamplesPerSec * s_wave_formatx.nBlockAlign;
s_wave_callback = new delegateWaveOutProc( wave_callback );
s_hwave_out = IntPtr.Zero;
Console.WriteLine( " calling waveOutOpen..." );
uint ret = win32.waveOutOpen( ref s_hwave_out,
win32.WAVE_MAPPER,
ref s_wave_formatx,
s_wave_callback,
IntPtr.Zero,
(uint)win32.CALLBACK_FUNCTION );
Console.WriteLine( " ...done; ret=" + ret );
#if DEBUG
com.github.cadencii.debug.push_log( " s_hwave_out=0x" + Convert.ToString( s_hwave_out.ToInt32(), 16 ) );
#endif
for ( int k = 0; k < _NUM_BUF; k++ ) {
s_ptr_wave[k] = Marshal.AllocHGlobal( sizeof( uint ) * s_block_size );
s_wave[k] = (uint*)s_ptr_wave[k];// = (ulong*)calloc( sizeof( ulong ), s_block_size );
s_ptr_wave_header[k] = Marshal.AllocHGlobal( sizeof( WAVEHDR ) );
s_wave_header[k] = (WAVEHDR)Marshal.PtrToStructure( s_ptr_wave_header[k], typeof( WAVEHDR ) );
s_wave_header[k].lpData = s_ptr_wave[k];
s_wave_header[k].dwBufferLength = (uint)(sizeof( uint ) * s_block_size);
s_wave_header[k].dwFlags = win32.WHDR_BEGINLOOP | win32.WHDR_ENDLOOP;
s_wave_header[k].dwLoops = 1;
#if DEBUG
Console.WriteLine( "calling waveOutPrepareHeader..." );
#endif
uint ret2 = win32.waveOutPrepareHeader( s_hwave_out, ref s_wave_header[k], (uint)sizeof( WAVEHDR ) );
#if DEBUG
Console.WriteLine( "...done; ret2=" + ret2 );
#endif
s_wave_header[k].dwUser = new IntPtr( k );
}
#if DEBUG
com.github.cadencii.debug.push_log( " exit waveplay..ctor; s_hwave_out=0x" + Convert.ToString( s_hwave_out.ToInt32(), 16 ) );
#endif
}
//[return: MarshalAs(UnmanagedType.U4)]
public static extern uint waveOutOpen( ref IntPtr hWaveOut,
int uDeviceID,
ref WAVEFORMATEX lpFormat,
delegateWaveOutProc dwCallback,
IntPtr dwInstance,
uint dwFlags );