/// <summary>
/// Parses boxes for a specified range, looking for tags and
/// properties.
/// </summary>
/// <param name="start">
/// A <see cref="long" /> value specifying the seek position
/// at which to start reading.
/// </param>
/// <param name="end">
/// A <see cref="long" /> value specifying the seek position
/// at which to stop reading.
/// </param>
/// <param name="handler">
/// A <see cref="IsoHandlerBox" /> object that applied to the
/// range being searched.
/// </param>
private void ParseTagAndProperties(long start, long end,
IsoHandlerBox handler)
{
BoxHeader header;
for (long position = start; position < end;
position += header.TotalBoxSize)
{
header = new BoxHeader(file, position);
ByteVector type = header.BoxType;
if (type == BoxType.Moov ||
type == BoxType.Mdia ||
type == BoxType.Minf ||
type == BoxType.Stbl ||
type == BoxType.Trak)
{
ParseTagAndProperties(
header.HeaderSize + position,
header.TotalBoxSize + position,
handler);
}
else if (type == BoxType.Stsd)
{
stsd_boxes.Add(BoxFactory.CreateBox(
file, header, handler));
}
else if (type == BoxType.Hdlr)
{
handler = BoxFactory.CreateBox(file,
header, handler) as
IsoHandlerBox;
}
else if (mvhd_box == null &&
type == BoxType.Mvhd)
{
mvhd_box = BoxFactory.CreateBox(file,
header, handler) as
IsoMovieHeaderBox;
}
else if (udta_box == null &&
type == BoxType.Udta)
{
udta_box = BoxFactory.CreateBox(file,
header, handler) as
IsoUserDataBox;
}
else if (type == BoxType.Mdat)
{
mdat_start = position;
mdat_end = position + header.TotalBoxSize;
}
if (header.TotalBoxSize == 0)
{
break;
}
}
}
/// <summary>
/// Parses boxes for a specified range, looking for tags and
/// properties.
/// </summary>
/// <param name="start">
/// A <see cref="long" /> value specifying the seek position
/// at which to start reading.
/// </param>
/// <param name="end">
/// A <see cref="long" /> value specifying the seek position
/// at which to stop reading.
/// </param>
/// <param name="handler">
/// A <see cref="IsoHandlerBox" /> object that applied to the
/// range being searched.
/// </param>
/// <param name="parents">
/// A <see cref="T:List" /> of <see cref="BoxHeader" /> parents.
/// </param>
void ParseTagAndProperties(long start, long end, IsoHandlerBox handler, List <BoxHeader> parents)
{
BoxHeader header;
for (long position = start; position < end; position += header.TotalBoxSize)
{
header = new BoxHeader(file, position);
ByteVector type = header.BoxType;
if (type == BoxType.Moov)
{
ParseTagAndProperties(header.HeaderSize + position, header.TotalBoxSize + position, handler, AddParent(parents, header));
}
else if (type == BoxType.Mdia ||
type == BoxType.Minf ||
type == BoxType.Stbl ||
type == BoxType.Trak)
{
ParseTagAndProperties(header.HeaderSize + position, header.TotalBoxSize + position, handler, AddParent(parents, header));
}
else if (type == BoxType.Stsd)
{
stsd_boxes.Add(BoxFactory.CreateBox(file, header, handler));
}
else if (type == BoxType.Hdlr)
{
handler = BoxFactory.CreateBox(file, header, handler) as IsoHandlerBox;
}
else if (mvhd_box == null &&
type == BoxType.Mvhd)
{
mvhd_box = BoxFactory.CreateBox(file, header, handler) as IsoMovieHeaderBox;
}
else if (type == BoxType.Udta)
{
var udtaBox = BoxFactory.CreateBox(file, header, handler) as IsoUserDataBox;
// Since we can have multiple udta boxes, save the parent for each one
List <BoxHeader> new_parents = AddParent(parents, header);
udtaBox.ParentTree = new_parents.ToArray();
udta_boxes.Add(udtaBox);
}
else if (type == BoxType.Mdat)
{
mdat_start = position;
mdat_end = position + header.TotalBoxSize;
}
if (header.TotalBoxSize == 0)
{
break;
}
}
}
/// <summary>
/// Resets all internal fields.
/// </summary>
private void ResetFields()
{
mvhd_box = null;
udta_boxes.Clear();
moov_tree = null;
udta_tree = null;
stco_boxes.Clear();
stsd_boxes.Clear();
mdat_start = -1;
mdat_end = -1;
}
private void Read(ReadStyle propertiesStyle)
{
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);
if (udta_boxes.Count == 0)
{
IsoUserDataBox dummy = new IsoUserDataBox();
udta_boxes.Add(dummy);
}
if (IsAppleTagUdtaPresent())
{
TagTypesOnDisk |= TagTypes.Apple;
}
IsoUserDataBox udtaBox = FindAppleTagUdta();
if (null == udtaBox)
{
udtaBox = new IsoUserDataBox();
}
apple_tag = new AppleTag(udtaBox);
tag.SetTags(apple_tag);
if (propertiesStyle == ReadStyle.None)
{
Mode = AccessMode.Closed;
return;
}
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;
properties = new Properties(mvhd_box.Duration, audio_sample_entry, visual_sample_entry);
}
finally
{
Mode = AccessMode.Closed;
}
}
/// <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)
{
// 2TODO: 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;
}
}
/// <summary>
/// Resets all internal fields.
/// </summary>
private void ResetFields ()
{
mvhd_box = null;
udta_boxes.Clear ();
moov_tree = null;
udta_tree = null;
stco_boxes.Clear ();
stsd_boxes.Clear ();
mdat_start = -1;
mdat_end = -1;
}
/// <summary>
/// Parses boxes for a specified range, looking for tags and
/// properties.
/// </summary>
/// <param name="start">
/// A <see cref="long" /> value specifying the seek position
/// at which to start reading.
/// </param>
/// <param name="end">
/// A <see cref="long" /> value specifying the seek position
/// at which to stop reading.
/// </param>
/// <param name="handler">
/// A <see cref="IsoHandlerBox" /> object that applied to the
/// range being searched.
/// </param>
private void ParseTagAndProperties (long start, long end,
IsoHandlerBox handler, List<BoxHeader> parents)
{
BoxHeader header;
for (long position = start; position < end;
position += header.TotalBoxSize) {
header = new BoxHeader (file, position);
ByteVector type = header.BoxType;
if (type == BoxType.Moov) {
ParseTagAndProperties (header.HeaderSize + position,
header.TotalBoxSize + position,
handler,
AddParent (parents, header));
} else if (type == BoxType.Mdia ||
type == BoxType.Minf ||
type == BoxType.Stbl ||
type == BoxType.Trak) {
ParseTagAndProperties (
header.HeaderSize + position,
header.TotalBoxSize + position,
handler,
AddParent (parents, header));
} else if (type == BoxType.Stsd) {
stsd_boxes.Add (BoxFactory.CreateBox (
file, header, handler));
} else if (type == BoxType.Hdlr) {
handler = BoxFactory.CreateBox (file,
header, handler) as
IsoHandlerBox;
} else if (mvhd_box == null &&
type == BoxType.Mvhd) {
mvhd_box = BoxFactory.CreateBox (file,
header, handler) as
IsoMovieHeaderBox;
} else if (type == BoxType.Udta) {
IsoUserDataBox udtaBox = BoxFactory.CreateBox (file,
header, handler) as
IsoUserDataBox;
// Since we can have multiple udta boxes, save the parent for each one
List<BoxHeader> new_parents = AddParent (
parents, header);
udtaBox.ParentTree = new_parents.ToArray ();
udta_boxes.Add(udtaBox);
} else if (type == BoxType.Mdat) {
mdat_start = position;
mdat_end = position + header.TotalBoxSize;
}
if (header.TotalBoxSize == 0)
break;
}
}
/// <summary>
/// Parses boxes for a specified range, looking for tags and
/// properties.
/// </summary>
/// <param name="start">
/// A <see cref="long" /> value specifying the seek position
/// at which to start reading.
/// </param>
/// <param name="end">
/// A <see cref="long" /> value specifying the seek position
/// at which to stop reading.
/// </param>
/// <param name="handler">
/// A <see cref="IsoHandlerBox" /> object that applied to the
/// range being searched.
/// </param>
private void ParseTagAndProperties (long start, long end,
IsoHandlerBox handler)
{
BoxHeader header;
for (long position = start; position < end;
position += header.TotalBoxSize) {
header = new BoxHeader (file, position);
ByteVector type = header.BoxType;
if (type == BoxType.Moov ||
type == BoxType.Mdia ||
type == BoxType.Minf ||
type == BoxType.Stbl ||
type == BoxType.Trak) {
ParseTagAndProperties (
header.HeaderSize + position,
header.TotalBoxSize + position,
handler);
} else if (type == BoxType.Stsd) {
stsd_boxes.Add (BoxFactory.CreateBox (
file, header, handler));
} else if (type == BoxType.Hdlr) {
handler = BoxFactory.CreateBox (file,
header, handler) as
IsoHandlerBox;
} else if (mvhd_box == null &&
type == BoxType.Mvhd) {
mvhd_box = BoxFactory.CreateBox (file,
header, handler) as
IsoMovieHeaderBox;
} else if (udta_box == null &&
type == BoxType.Udta) {
udta_box = BoxFactory.CreateBox (file,
header, handler) as
IsoUserDataBox;
} else if (type == BoxType.Mdat) {
mdat_start = position;
mdat_end = position + header.TotalBoxSize;
}
if (header.TotalBoxSize == 0)
break;
}
}
/// <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_box = parser.UserDataBox;
if (udta_box != null && udta_box.GetChild(BoxType.Meta)
!= null && udta_box.GetChild(BoxType.Meta
).GetChild(BoxType.Ilst) != null)
{
TagTypesOnDisk |= TagTypes.Apple;
}
if (udta_box == null)
{
udta_box = new IsoUserDataBox();
}
apple_tag = new AppleTag(udta_box);
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;
}
}
private void ResetFields()
{
this.mvhd_box = null;
this.udta_box = null;
this.moov_tree = null;
this.udta_tree = null;
this.stco_boxes.Clear();
this.stsd_boxes.Clear();
this.mdat_start = -1L;
this.mdat_end = -1L;
}
private void ParseTagAndProperties(long start, long end, IsoHandlerBox handler)
{
BoxHeader header;
for (long i = start; i < end; i += header.TotalBoxSize)
{
header = new BoxHeader(this.file, i);
ByteVector boxType = header.BoxType;
if (((boxType == BoxType.Moov) || (boxType == BoxType.Mdia)) || (((boxType == BoxType.Minf) || (boxType == BoxType.Stbl)) || (boxType == BoxType.Trak)))
{
this.ParseTagAndProperties(header.HeaderSize + i, header.TotalBoxSize + i, handler);
}
else if (boxType == BoxType.Stsd)
{
this.stsd_boxes.Add(BoxFactory.CreateBox(this.file, header, handler));
}
else if (boxType == BoxType.Hdlr)
{
handler = BoxFactory.CreateBox(this.file, header, handler) as IsoHandlerBox;
}
else if ((this.mvhd_box == null) && (boxType == BoxType.Mvhd))
{
this.mvhd_box = BoxFactory.CreateBox(this.file, header, handler) as IsoMovieHeaderBox;
}
else if ((this.udta_box == null) && (boxType == BoxType.Udta))
{
this.udta_box = BoxFactory.CreateBox(this.file, header, handler) as IsoUserDataBox;
}
else if (boxType == BoxType.Mdat)
{
this.mdat_start = i;
this.mdat_end = i + header.TotalBoxSize;
}
if (header.TotalBoxSize == 0)
{
break;
}
}
}