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namespace TagLib.Mpeg4
{
[SupportedMimeType("taglib/m4a", "m4a")]
[SupportedMimeType("taglib/m4p", "m4p")]
[SupportedMimeType("taglib/mp4", "mp4")]
[SupportedMimeType("audio/mp4")]
[SupportedMimeType("audio/x-m4a")]
public class File : TagLib.File
{
//////////////////////////////////////////////////////////////////////////
// private properties
//////////////////////////////////////////////////////////////////////////
private AppleTag tag;
private Properties properties;
//////////////////////////////////////////////////////////////////////////
// public methods
//////////////////////////////////////////////////////////////////////////
public File (string file, AudioProperties.ReadStyle properties_style) : base (file)
{
// Nullify for safety.
tag = null;
properties = null;
// Try to open read support.
try {Mode = AccessMode.Read;}
catch {return;}
// Read
Read (properties_style);
// Be nice and close.
Mode = AccessMode.Closed;
}
// Assume average speed.
public File (string file) : this (file, AudioProperties.ReadStyle.Average)
{
}
// Read the tag. If it doesn't exist, create.
public override TagLib.Tag Tag {get {return GetTag (TagTypes.Apple, true);}}
// Read the properties.
public override TagLib.AudioProperties AudioProperties {get {return properties;}}
// Save. This work is done in the AppleTag.
public override void Save ()
{
tag.Save();
}
// Get the Apple Tag.
public override TagLib.Tag GetTag (TagTypes type, bool create)
{
if (type == TagTypes.Apple)
{
if (tag == null && create)
tag = new AppleTag (this);
return tag;
}
return null;
}
// Read the file.
private void Read (AudioProperties.ReadStyle properties_style)
{
// Create a dummie outer box, as perscribed by the specs.
FileBox file_box = new FileBox (this);
// Find the movie box and item list. If the movie box doen't exist, an
// exception will be thrown on the next call, but if there is no movie
// box, the file can't possibly be valid.
IsoMovieBox moov_box = (IsoMovieBox) file_box.FindChildDeep ("moov");
AppleItemListBox ilst_box = (AppleItemListBox) moov_box.FindChildDeep ("ilst");
// If we have a ItemListBox, deparent it.
if (ilst_box != null)
ilst_box.RemoveFromParent ();
// Create the tag.
tag = new AppleTag (ilst_box, this);
// If we're not reading properties, we're done.
if(properties_style == Properties.ReadStyle.None)
return;
// Get the movie header box.
IsoMovieHeaderBox mvhd_box = (IsoMovieHeaderBox) moov_box.FindChildDeep ("mvhd");
IsoAudioSampleEntry sample_entry = null;
// Find a TrackBox with a sound Handler.
foreach (Box box in moov_box.Children)
if (box.BoxType == "trak")
{
// If the handler isn't sound, it could be metadata or video or
// any number of other things.
IsoHandlerBox hdlr_box = (IsoHandlerBox) box.FindChildDeep ("hdlr");
if (hdlr_box == null || hdlr_box.HandlerType != "soun")
continue;
// This track SHOULD contain at least one sample entry.
sample_entry = (IsoAudioSampleEntry) box.FindChildDeep (typeof (IsoAudioSampleEntry));
break;
}
// If we have a MovieHeaderBox, deparent it.
if (mvhd_box != null)
mvhd_box.RemoveFromParent ();
// If we have a SampleEntry, deparent it.
if (sample_entry != null)
sample_entry.RemoveFromParent ();
// Read the properties.
properties = new Properties (mvhd_box, sample_entry, properties_style);
}
/*
private void ShowAllTags (Box box, string spa)
{
if (box.GetType () == typeof (AppleDataBox))
System.Console.WriteLine (spa + box.BoxType.Mid (box.BoxType [0] == 0xa9 ? 1 : 0).ToString () + " - " + box.ToString () + " - " + ((AppleDataBox)box).Text);
else if (box.GetType () == typeof (AppleAdditionalInfoBox))
System.Console.WriteLine (spa + box.BoxType.Mid (box.BoxType [0] == 0xa9 ? 1 : 0).ToString () + " - " + box.ToString () + " - " + ((AppleAdditionalInfoBox)box).Text);
else
System.Console.WriteLine (spa + box.BoxType.Mid (box.BoxType [0] == 0xa9 ? 1 : 0).ToString () + " - " + box.ToString ());
foreach (Box child in box.Children)
{
ShowAllTags (child, spa + " ");
}
}
*/
}
}
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