public IEnumerable <AcmFormat> GetFormats(AcmFormatTag formatTag)
{
if (this.driverHandle == IntPtr.Zero)
{
throw new InvalidOperationException("Driver must be opened first");
}
this.tempFormatsList = new List <AcmFormat>();
AcmFormatDetails acmFormatDetails = default(AcmFormatDetails);
acmFormatDetails.structSize = Marshal.SizeOf(acmFormatDetails);
acmFormatDetails.waveFormatByteSize = 1024;
acmFormatDetails.waveFormatPointer = Marshal.AllocHGlobal(acmFormatDetails.waveFormatByteSize);
acmFormatDetails.formatTag = (int)formatTag.FormatTag;
MmResult result = AcmInterop.acmFormatEnum(this.driverHandle, ref acmFormatDetails, new AcmInterop.AcmFormatEnumCallback(this.AcmFormatEnumCallback), IntPtr.Zero, AcmFormatEnumFlags.None);
Marshal.FreeHGlobal(acmFormatDetails.waveFormatPointer);
MmException.Try(result, "acmFormatEnum");
return(this.tempFormatsList);
}
/// <summary>
/// Gets all the supported formats for a given format tag
/// </summary>
/// <param name="formatTag">Format tag</param>
/// <returns>Supported formats</returns>
public IEnumerable <AcmFormat> GetFormats(AcmFormatTag formatTag)
{
if (driverHandle == IntPtr.Zero)
{
throw new InvalidOperationException("Driver must be opened first");
}
tempFormatsList = new List <AcmFormat>();
AcmFormatDetails formatDetails = new AcmFormatDetails();
formatDetails.structSize = Marshal.SizeOf(formatDetails);
formatDetails.waveFormatByteSize = MaxFormatSize; // formatTag.FormatSize doesn't work;
formatDetails.waveFormatPointer = Marshal.AllocHGlobal(formatDetails.waveFormatByteSize);
formatDetails.formatTag = (int)formatTag.FormatTag; // (int)WaveFormatEncoding.Unknown
MmResult result = AcmInterop.acmFormatEnum(driverHandle,
ref formatDetails, AcmFormatEnumCallback, IntPtr.Zero,
AcmFormatEnumFlags.None);
Marshal.FreeHGlobal(formatDetails.waveFormatPointer);
MmException.Try(result, "acmFormatEnum");
return(tempFormatsList);
}
/// <summary>
/// Gets all the supported formats for a given format tag
/// </summary>
/// <param name="formatTag">Format tag</param>
/// <returns>Supported formats</returns>
public IEnumerable <AcmFormat> GetFormats(AcmFormatTag formatTag)
{
if (driverHandle == IntPtr.Zero)
{
throw new InvalidOperationException("Driver must be opened first");
}
tempFormatsList = new List <AcmFormat>();
var formatDetails = new AcmFormatDetails();
formatDetails.structSize = Marshal.SizeOf(formatDetails);
// need to make sure we have enough space for a waveFormat. formatTag.FormatSize isn't reliable,
// and some codecs MaxFormatSize isn't either
formatDetails.waveFormatByteSize = 1024;
formatDetails.waveFormatPointer = Marshal.AllocHGlobal(formatDetails.waveFormatByteSize);
formatDetails.formatTag = (int)formatTag.FormatTag; // (int)WaveFormatEncoding.Unknown
var result = AcmInterop.acmFormatEnum(driverHandle,
ref formatDetails, AcmFormatEnumCallback, IntPtr.Zero,
AcmFormatEnumFlags.None);
Marshal.FreeHGlobal(formatDetails.waveFormatPointer);
MmException.Try(result, "acmFormatEnum");
return(tempFormatsList);
}
