/// <summary>
/// Parses a raw AVI stream list and returns the stream
/// information.
/// </summary>
/// <param name="data">
/// A <see cref="ByteVector" /> object containing raw stream
/// list.
/// </param>
/// <returns>
/// A <see cref="AviStream" /> object containing stream
/// information.
/// </returns>
public static AviStream ParseStreamList(ByteVector data)
{
if (data == null)
{
throw new ArgumentNullException(nameof(data));
}
if (!data.StartsWith("strl"))
{
return(null);
}
AviStream stream = null;
var pos = 4;
while (pos + 8 < data.Count)
{
var id = data.Mid(pos, 4);
var block_length = (int)data.Mid(pos + 4, 4)
.ToUInt(false);
if (id == "strh" && stream == null)
{
var stream_header =
new AviStreamHeader(data, pos + 8);
if (stream_header.Type == "vids")
{
stream = new AviVideoStream(
stream_header);
}
else if (stream_header.Type == "auds")
{
stream = new AviAudioStream(
stream_header);
}
}
else if (stream != null)
{
stream.ParseItem(id, data, pos + 8, block_length);
}
pos += block_length + 8;
}
return(stream);
}
/// <summary>
/// Constructs and intializes a new instance of
/// <see
/// cref="AviVideoStream" />
/// with a specified stream header.
/// </summary>
/// <param name="header">
/// A <see cref="AviStreamHeader" /> object containing the
/// stream's header.
/// </param>
public AviVideoStream(AviStreamHeader header)
: base(header)
{
}
/// <summary>
/// Constructs and intializes a new instance of
/// <see
/// cref="AviStream" />
/// with a specified stream header.
/// </summary>
/// <param name="header">
/// A <see cref="AviStreamHeader" /> object containing the
/// stream's header.
/// </param>
protected AviStream(AviStreamHeader header)
{
Header = header;
}
/// <summary>
/// Constructs and intializes a new instance of
/// <see
/// cref="AviAudioStream" />
/// with a specified stream header.
/// </summary>
/// <param name="header">
/// A <see cref="AviStreamHeader" /> object containing the
/// stream's header.
/// </param>
public AviAudioStream(AviStreamHeader header)
: base(header)
{
}