/// <summary>
/// Create the writer indicating Metadata information
/// </summary>
/// <param name="output"><see cref="System.IO.Stream"/> Where resulting WMA string will be written</param>
/// <param name="inputFormat">PCM format of input data received in <see cref="WmaWriter.Write"/> method</param>
/// <param name="profile">IWMProfile that describe the resulting compressed stream</param>
/// <param name="MetadataAttributes">Array of <see cref="Yeti.WMFSdk.WM_Attr"/> structures describing the metadata information that will be in the result stream</param>
public WmaWriter(Stream output, WaveFormat inputFormat, IWMProfile profile, WM_Attr[] MetadataAttributes)
{
this.m_outputStream = output;
this.m_inputFormat = inputFormat;
m_Writer = WM.CreateWriter();
IWMWriterAdvanced wa = (IWMWriterAdvanced)m_Writer;
wa.AddSink((IWMWriterSink)this);
m_Writer.SetProfile(profile);
uint inputs;
m_Writer.GetInputCount(out inputs);
if (inputs == 1)
{
IWMInputMediaProps InpProps;
Guid type;
m_Writer.GetInputProps(0, out InpProps);
InpProps.GetType(out type);
if (type == MediaTypes.WMMEDIATYPE_Audio)
{
WM_MEDIA_TYPE mt;
mt.majortype = MediaTypes.WMMEDIATYPE_Audio;
mt.subtype = MediaTypes.WMMEDIASUBTYPE_PCM;
mt.bFixedSizeSamples = true;
mt.bTemporalCompression = false;
mt.lSampleSize = (uint)inputFormat.BlockAlign;
mt.formattype = MediaTypes.WMFORMAT_WaveFormatEx;
mt.pUnk = IntPtr.Zero;
mt.cbFormat = (uint)Marshal.SizeOf(inputFormat);
GCHandle h = GCHandle.Alloc(inputFormat, GCHandleType.Pinned);
try
{
mt.pbFormat = h.AddrOfPinnedObject();
InpProps.SetMediaType(ref mt);
}
finally
{
h.Free();
}
m_Writer.SetInputProps(0, InpProps);
if (MetadataAttributes != null)
{
WMHeaderInfo info = new WMHeaderInfo((IWMHeaderInfo)m_Writer);
foreach (WM_Attr attr in MetadataAttributes)
{
info.SetAttribute(attr);
}
info = null;
}
m_Writer.BeginWriting();
m_Profile = profile;
}
else
{
throw new ArgumentException("Invalid profile", "profile");
}
}
else
{
throw new ArgumentException("Invalid profile", "profile");
}
}
