/// 現在の再生位置を取得する。再生中でない場合負の値となる。
public float get_play_time()
{
#if DEBUG
cadencii.debug.push_log("WavePlay.get_play_time");
#endif
if (s_playing)
{
MMTIME mmt = new MMTIME();
mmt.cb = (uint)sizeof(MMTIME);
mmt.wType = win32.TIME_MS;
uint ret = win32.waveOutGetPosition(s_hwave_out, ref mmt, (uint)sizeof(MMTIME));
#if DEBUG
cadencii.debug.push_log(" ret=" + ret);
#endif
float ms = 0.0f;
switch (mmt.wType)
{
case win32.TIME_MS:
return(mmt.ms * 0.001f);
case win32.TIME_SAMPLES:
return((float)mmt.sample / (float)s_wave_formatx.nSamplesPerSec);
case win32.TIME_BYTES:
return((float)mmt.cb / (float)s_wave_formatx.nAvgBytesPerSec);
default:
return(-1.0f);
}
}
else
{
return(-1.0f);
}
}
public static double SoundGetPosition()
{
if (IntPtr.Zero == wave_out)
{
return(-1.0);
}
MMTIME mmt = new MMTIME();
mmt.wType = win32.TIME_MS;
win32.waveOutGetPosition(wave_out, ref mmt, (uint)sizeof(MMTIME));
float ms = 0.0f;
switch (mmt.wType)
{
case win32.TIME_MS:
return(mmt.ms * 0.001);
case win32.TIME_SAMPLES:
return((double)mmt.sample / (double)wave_format.nSamplesPerSec);
case win32.TIME_BYTES:
return((double)mmt.cb / (double)wave_format.nAvgBytesPerSec);
default:
return(-1.0);
}
return(0.0);
}
/// <summary>Get the playback position in the stream</summary>
/// <returns>position</returns>
public uint GetPosition()
{
if (!this.Playing)
{
return(0);
}
// set up the struct
MMTIME udtTime = new MMTIME();
udtTime.wType = (int)TIME_FORMAT.TIME_BYTES;
// pass it in
waveOutGetPosition(_pWaveOut, ref udtTime, Marshal.SizeOf(udtTime));
// format time
int x = (int)(udtTime.u / this.AvgBytesPerSecond) * 1000;
switch (udtTime.wType)
{
case (int)TIME_FORMAT.TIME_BYTES:
return((uint)(udtTime.u / this.AvgBytesPerSecond) * 1000);
case (int)TIME_FORMAT.TIME_SAMPLES:
return((uint)(udtTime.u / this.SamplesPerSecond) * 1000);
case (int)TIME_FORMAT.TIME_MS:
return((uint)udtTime.u);
default:
return(0);
}
}
public static extern MmResult midiStreamPosition(IntPtr hMidiStream, [MarshalAs(UnmanagedType.Struct)] ref MMTIME lpmmt, int cbmmt);
protected static extern Wave.MMSYSERR waveOutGetPosition(IntPtr hwo, MMTIME pmmt, uint cbmmt);
public static extern MMSYSERROR waveOutGetPosition(WaveOutSafeHandle hwo, ref MMTIME pmmt, int cbmmt);
static extern int midiStreamPosition(IntPtr handle, ref MMTIME lpMMTime, int uSize);
public static extern MmResult midiStreamPosition(IntPtr hMidiStream, ref MMTIME lpmmt, int cbmmt);
public static extern int waveOutGetPosition(IntPtr hwo, ref MMTIME pmmt, int cbmmt);
public static extern int timeGetSystemTime(ref MMTIME pmmt, int cbmmt);
public static extern int waveOutGetPosition(IntPtr hWaveOut, ref MMTIME pmmt, int uSize);
public static extern MMRESULT timeGetSystemTime(out MMTIME pmmt, uint cbmmt = 8);
private static extern MMSYSERR waveOutGetPosition(IntPtr hWaveOut, ref MMTIME lpInfo, int uSize);
protected static extern Wave.MMSYSERR waveOutGetPosition(IntPtr hwo, MMTIME pmmt, uint cbmmt);
