/// <summary>
/// Initializes a new instance of the <see cref="FlacSubFrame"/> class.
/// </summary>
/// <param name="flacFrame">The FLAC frame.</param>
protected FlacSubFrame(FlacFrame flacFrame)
{
if (flacFrame == null)
throw new ArgumentNullException("flacFrame");
FlacFrame = flacFrame;
}
////------------------------------------------------------------------------------------------------------------------------------
/// <summary>
/// Reads a <see cref="FlacSubFrame" /> from a <see cref="Stream" />.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="channel">The channel.</param>
/// <param name="flacFrame">The FLAC frame.</param>
/// <returns>
/// true if found; otherwise, null.
/// </returns>
/// <exception cref="System.ArgumentNullException">Thrown if stream is null.</exception>
public static FlacSubFrame ReadFrame(Stream stream, int channel, FlacFrame flacFrame)
{
if (stream == null)
throw new ArgumentNullException("stream");
if (flacFrame == null)
throw new ArgumentNullException("flacFrame");
return ReadSubFrame(stream as StreamBuffer ?? new StreamBuffer(stream), channel, flacFrame);
}
/// <summary>
/// Initializes a new instance of the <see cref="FlacVerbatimSubFrame"/> class.
/// </summary>
/// <param name="flacFrame">The <see cref="FlacFrame"/>.</param>
public FlacVerbatimSubFrame(FlacFrame flacFrame)
: base(flacFrame)
{
if (flacFrame == null)
throw new ArgumentNullException("flacFrame");
}
////------------------------------------------------------------------------------------------------------------------------------
/// <summary>
/// Reads a <see cref="FlacFrame" /> from a <see cref="Stream" />.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="flacStream">The FLAC stream.</param>
/// <returns>
/// true if found; otherwise, null.
/// </returns>
/// <exception cref="System.ArgumentNullException">Thrown if stream is null.</exception>
public static FlacFrame ReadFrame(Stream stream, IO.FlacStream flacStream)
{
if (stream == null)
throw new ArgumentNullException("stream");
if (flacStream == null)
throw new ArgumentNullException("flacStream");
FlacFrame frame = new FlacFrame(flacStream);
return frame.ReadFrame(stream as StreamBuffer ?? new StreamBuffer(stream)) ? frame : null;
}
/// <summary>
/// Initializes a new instance of the <see cref="FlacLinearPredictorSubFrame"/> class.
/// </summary>
/// <param name="flacFrame">The <see cref="FlacFrame"/>.</param>
public FlacLinearPredictorSubFrame(FlacFrame flacFrame)
: base(flacFrame)
{
if (flacFrame == null)
throw new ArgumentNullException("flacFrame");
}
/// <summary>
/// Initializes a new instance of the <see cref="FlacConstantSubFrame"/> class.
/// </summary>
/// <param name="flacFrame">The FLAC frame.</param>
public FlacConstantSubFrame(FlacFrame flacFrame)
: base(flacFrame)
{
if (flacFrame == null)
throw new ArgumentNullException("flacFrame");
}
////------------------------------------------------------------------------------------------------------------------------------
private static FlacSubFrame ReadSubFrame(StreamBuffer sb, int channel, FlacFrame flacFrame)
{
if (sb == null)
throw new ArgumentNullException("sb");
if (flacFrame == null)
throw new ArgumentNullException("flacFrame");
FlacSubFrame frame;
int header = sb.ReadBigEndianInt32(false);
int type = (header >> 1) & 0x7E;
switch (type)
{
case 0x00:
frame = new FlacConstantSubFrame(flacFrame);
break;
case 0x01:
frame = new FlacVerbatimSubFrame(flacFrame);
break;
default:
if ((type >= 0x08) && (type <= 0x0C))
frame = new FlacFixedSubFrame(flacFrame);
else if (type >= 0x20)
frame = new FlacLinearPredictorSubFrame(flacFrame);
else
frame = new FlacSubFrame(flacFrame);
break;
}
frame.ReadSubFrame(sb, channel);
return frame;
}
