/// <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);
}
private bool AcmFormatEnumCallback(IntPtr hAcmDriverId, ref AcmFormatDetails formatDetails, IntPtr dwInstance, AcmDriverDetailsSupportFlags flags)
{
tempFormatsList.Add(new AcmFormat(formatDetails));
return true;
}
/// <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;
}
public static extern MmResult acmFormatEnum(IntPtr hAcmDriver, ref AcmFormatDetails formatDetails, AcmFormatEnumCallback callback, IntPtr instance, AcmFormatEnumFlags flags);
private bool AcmFormatEnumCallback(IntPtr hAcmDriverId, ref AcmFormatDetails formatDetails, IntPtr dwInstance, AcmDriverDetailsSupportFlags flags)
{
tempFormatsList.Add(new AcmFormat(formatDetails));
return(true);
}
internal AcmFormat(AcmFormatDetails formatDetails)
{
this.formatDetails = formatDetails;
waveFormat = WaveFormat.MarshalFromPtr(formatDetails.waveFormatPointer);
}
internal AcmFormat(AcmFormatDetails formatDetails)
{
this.formatDetails = formatDetails;
waveFormat = WaveFormat.MarshalFromPtr(formatDetails.waveFormatPointer);
}
