/// <summary>
/// Reads the file with a specified read style.
/// </summary>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
private void Read(ReadStyle propertiesStyle)
{
// TODO: Support Id3v2 boxes!!!
tag = new CombinedTag();
Mode = AccessMode.Read;
try
{
FileParser parser = new FileParser(this);
if (propertiesStyle == ReadStyle.None)
{
parser.ParseTag();
}
else
{
parser.ParseTagAndProperties();
}
InvariantStartPosition = parser.MdatStartPosition;
InvariantEndPosition = parser.MdatEndPosition;
udta_boxes.AddRange(parser.UserDataBoxes);
// Ensure our collection contains at least a single empty box
if (udta_boxes.Count == 0)
{
IsoUserDataBox dummy = new IsoUserDataBox();
udta_boxes.Add(dummy);
}
// Check if a udta with ILST actually exists
if (IsAppleTagUdtaPresent())
{
TagTypesOnDisk |= TagTypes.Apple; //There is an udta present with ILST info
}
// Find the udta box with the Apple Tag ILST
IsoUserDataBox udtaBox = FindAppleTagUdta();
if (null == udtaBox)
{
udtaBox = new IsoUserDataBox();
}
apple_tag = new AppleTag(udtaBox);
tag.SetTags(apple_tag);
// If we're not reading properties, we're done.
if (propertiesStyle == ReadStyle.None)
{
Mode = AccessMode.Closed;
return;
}
// Get the movie header box.
IsoMovieHeaderBox mvhd_box = parser.MovieHeaderBox;
if (mvhd_box == null)
{
Mode = AccessMode.Closed;
throw new CorruptFileException(
"mvhd box not found.");
}
IsoAudioSampleEntry audio_sample_entry =
parser.AudioSampleEntry;
IsoVisualSampleEntry visual_sample_entry =
parser.VisualSampleEntry;
// Read the properties.
properties = new Properties(mvhd_box.Duration,
audio_sample_entry, visual_sample_entry);
}
finally
{
Mode = AccessMode.Closed;
}
}
