protected override void LoadHeader()
{
base.LoadHeader();
byte[] fmtIn = _fmt.GetBytes();
if (_fmt2 == null)
{
_fmt2 = WaveFormat2.GetPCMWaveFormat(_fmt.SamplesPerSec, _fmt.Channels, _fmt.BitsPerSample != 0 ? _fmt.BitsPerSample : (short)16);
}
byte[] fmtOut = _fmt2.GetBytes();
MMResult mmr;
_fmt2 = new WaveFormat2(fmtOut);
mmr = AcmNativeMethods.acmStreamOpen(out hStreamComp, IntPtr.Zero, fmtIn, fmtOut, IntPtr.Zero, 0, 0, AcmStreamOpenFlags.CALLBACK_NULL);
hdr1 = new ACMSTREAMHEADER();
hdr1.cbStruct = Marshal.SizeOf(hdr1);
hdr2 = new ACMSTREAMHEADER();
hdr2.cbStruct = Marshal.SizeOf(hdr2);
int cbIn = (_fmt.AvgBytesPerSec * DefaultBufferSizeInSeconds / _fmt.BlockAlign + 1) * _fmt.BlockAlign;
inBuffer1 = new byte[cbIn];
inBuffer2 = new byte[cbIn];
int cbOut = _fmt2.BlockAlign * _fmt2.AvgBytesPerSec * DefaultBufferSizeInSeconds;
mmr = AcmNativeMethods.acmStreamSize(hStreamComp, cbIn, out cbOut, AcmStreamSizeFlags.SOURCE);
outBuffer1 = new byte[cbOut];
outBuffer2 = new byte[cbOut];
hinBuffer1 = GCHandle.Alloc(inBuffer1, GCHandleType.Pinned);
houtBuffer1 = GCHandle.Alloc(outBuffer1, GCHandleType.Pinned);
hinBuffer2 = GCHandle.Alloc(inBuffer2, GCHandleType.Pinned);
houtBuffer2 = GCHandle.Alloc(outBuffer2, GCHandleType.Pinned);
hdr1.pbSrc = hinBuffer1.AddrOfPinnedObject();
hdr1.pbDst = houtBuffer1.AddrOfPinnedObject();
hdr1.cbSrcLength = cbIn;
hdr1.cbDstLength = cbOut;
hdr2.pbSrc = hinBuffer2.AddrOfPinnedObject();
hdr2.pbDst = houtBuffer2.AddrOfPinnedObject();
hdr2.cbSrcLength = cbIn;
hdr2.cbDstLength = cbOut;
ptrBuffer1 = ptrBuffer1 = 0;
bufferRead = new SlidingBuffer(cbOut);
firstBlock = true;
bufferRead.BufferStarving = (BufferStarvingHandler) delegate(SlidingBuffer obj, int spaceAvailable)
{
if (hdr1.cbDstLengthUsed == ptrBuffer1)
{
int cb = ReadInternal(inBuffer1, 0, inBuffer1.Length);
if (cb == 0)
{
return(0);
}
ptrBuffer1 = 0;
AcmStreamConvertFlags flags;
if (firstBlock)
{
flags = AcmStreamConvertFlags.START;
firstBlock = false;
}
else if (cb == inBuffer1.Length)
{
flags = AcmStreamConvertFlags.BLOCKALIGN;
}
else
{
flags = AcmStreamConvertFlags.END;
}
hdr1.cbSrcLength = cb;
MMResult res = AcmNativeMethods.acmStreamConvert(hStreamComp, ref hdr1, flags);
return(cb);
}
int written = obj.Append(outBuffer1, ptrBuffer1, hdr1.cbDstLengthUsed - ptrBuffer1);
ptrBuffer1 += written;
return(written);
};
mmr = AcmNativeMethods.acmStreamPrepareHeader(hStreamComp, ref hdr1, 0);
mmr = AcmNativeMethods.acmStreamPrepareHeader(hStreamComp, ref hdr2, 0);
}
extern static public int acmStreamUnprepareHeader(IntPtr has, ref ACMSTREAMHEADER pash, int fdwUnprepare);
protected override bool InitializeForWriting(Stream underlyingStream, WaveFormat2 wfIn, WaveFormat2 wfOut, bool fAppend)
{
base.InitializeForWriting(underlyingStream, wfIn, wfOut, fAppend);
MMResult mmr;
int driverId = 0;
foreach (AcmDriverInfo drvInfo in ACMSupport.SupportedDrivers)
{
foreach (AcmFormatInfo fmtInfo in drvInfo.Formats)
{
if (fmtInfo.Format == wfOut)
{
driverId = fmtInfo.DriverId;
break;
}
}
}
foreach (AcmDriverInfo drvInfo in ACMSupport.SupportedDrivers)
{
foreach (AcmFormatInfo fmtInfo in drvInfo.Formats)
{
if (fmtInfo.DriverId == driverId && fmtInfo.Format.FormatTag == wfIn.FormatTag)
{
wfIn.CopyFrom(fmtInfo.Format);
break;
}
}
}
byte[] fmtIn = wfIn.GetBytes();
byte[] fmtOut = wfOut.GetBytes();
IntPtr hDrv = IntPtr.Zero;
if (driverId != 0)
{
AcmNativeMethods.acmDriverOpen(out hDrv, driverId, 0);
}
mmr = AcmNativeMethods.acmStreamOpen(out hStreamComp, hDrv, fmtIn, fmtOut, IntPtr.Zero, 0, 0, AcmStreamOpenFlags.CALLBACK_NULL | AcmStreamOpenFlags.NONREALTIME);
hdr1 = new ACMSTREAMHEADER();
hdr1.cbStruct = Marshal.SizeOf(hdr1);
hdr2 = new ACMSTREAMHEADER();
hdr2.cbStruct = Marshal.SizeOf(hdr2);
int cbIn = (wfIn.AvgBytesPerSec * DefaultBufferSizeInSeconds / wfIn.BlockAlign + 1) * wfIn.BlockAlign;
inBuffer1 = new byte[cbIn];
inBuffer2 = new byte[cbIn];
int cbOut = wfOut.BlockAlign * wfOut.AvgBytesPerSec * DefaultBufferSizeInSeconds;
mmr = AcmNativeMethods.acmStreamSize(hStreamComp, cbIn, out cbOut, AcmStreamSizeFlags.DESTINATION);
outBuffer1 = new byte[cbOut];
outBuffer2 = new byte[cbOut];
hinBuffer1 = GCHandle.Alloc(inBuffer1, GCHandleType.Pinned);
houtBuffer1 = GCHandle.Alloc(outBuffer1, GCHandleType.Pinned);
hinBuffer2 = GCHandle.Alloc(inBuffer2, GCHandleType.Pinned);
houtBuffer2 = GCHandle.Alloc(outBuffer2, GCHandleType.Pinned);
hdr1.pbSrc = hinBuffer1.AddrOfPinnedObject();
hdr1.pbDst = houtBuffer1.AddrOfPinnedObject();
hdr1.cbSrcLength = cbIn;
hdr1.cbDstLength = cbOut;
hdr2.pbSrc = hinBuffer2.AddrOfPinnedObject();
hdr2.pbDst = houtBuffer2.AddrOfPinnedObject();
hdr2.cbSrcLength = cbIn;
hdr2.cbDstLength = cbOut;
ptrBuffer1 = ptrBuffer1 = 0;
firstBlock = true;
mmr = AcmNativeMethods.acmStreamPrepareHeader(hStreamComp, ref hdr1, 0);
mmr = AcmNativeMethods.acmStreamPrepareHeader(hStreamComp, ref hdr2, 0);
return(true);
}
extern static public int acmStreamConvert(IntPtr has, ref ACMSTREAMHEADER pash, AcmStreamConvertFlags fdwConvert);
