/// <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="format">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.wma.structs.WM_Attr"/> structures describing the metadata information that will be in the result stream</param>
public WmaWriter(Stream output, WaveFormat format, IWMProfile profile, IEnumerable <WM_Attr> metadataAttributes)
: base(output, format)
{
m_Writer = WM.CreateWriter();
var 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)m_InputDataFormat.nBlockAlign;
mt.formattype = MediaTypes.WMFORMAT_WaveFormatEx;
mt.pUnk = IntPtr.Zero;
mt.cbFormat = (uint)Marshal.SizeOf(m_InputDataFormat);
GCHandle h = GCHandle.Alloc(m_InputDataFormat, GCHandleType.Pinned);
try
{
mt.pbFormat = h.AddrOfPinnedObject();
inpProps.SetMediaType(ref mt);
}
finally
{
h.Free();
}
m_Writer.SetInputProps(0, inpProps);
if (metadataAttributes != null)
{
var 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");
}
}
