/// <summary>
/// Reads the contents of the current instance determining
/// the size of the riff data, the area the tagging is in,
/// and optionally reading in the tags and media properties.
/// </summary>
/// <param name="read_tags">
/// If <see langword="true" />, any tags found will be read
/// into the current instance.
/// </param>
/// <param name="style">
/// A <see cref="ReadStyle"/> value specifying how the media
/// data is to be read into the current instance.
/// </param>
/// <param name="riff_size">
/// A <see cref="uint"/> value reference to be filled with
/// the size of the RIFF data as read from the file.
/// </param>
/// <param name="tag_start">
/// A <see cref="long" /> value reference to be filled with
/// the absolute seek position at which the tagging data
/// starts.
/// </param>
/// <param name="tag_end">
/// A <see cref="long" /> value reference to be filled with
/// the absolute seek position at which the tagging data
/// ends.
/// </param>
/// <exception cref="CorruptFileException">
/// The file does not begin with <see cref="FileIdentifier"
/// />.
/// </exception>
private void Read(bool read_tags, ReadStyle style,
out uint riff_size, out long tag_start,
out long tag_end)
{
Seek (0);
if (ReadBlock (4) != FileIdentifier)
throw new CorruptFileException (
"File does not begin with RIFF identifier");
riff_size = ReadBlock (4).ToUInt (false);
ByteVector stream_format = ReadBlock (4);
tag_start = -1;
tag_end = -1;
long position = 12;
long length = Length;
uint size = 0;
TimeSpan duration = TimeSpan.Zero;
ICodec [] codecs = new ICodec [0];
// Read until there are less than 8 bytes to read.
do {
bool tag_found = false;
Seek (position);
string fourcc = ReadBlock (4).ToString (StringType.UTF8);
size = ReadBlock (4).ToUInt (false);
switch (fourcc)
{
// "fmt " is used by Wave files to hold the
// WaveFormatEx structure.
case "fmt ":
if (style == ReadStyle.None ||
stream_format != "WAVE")
break;
Seek (position + 8);
codecs = new ICodec [] {
new WaveFormatEx (ReadBlock (18), 0)
};
break;
// "data" contains the audio data for wave
// files. It's contents represent the invariant
// portion of the file and is used to determine
// the duration of a file. It should always
// appear after "fmt ".
case "data":
if (stream_format != "WAVE")
break;
InvariantStartPosition = position;
InvariantEndPosition = position + size;
if (style == ReadStyle.None ||
codecs.Length != 1 ||
!(codecs [0] is WaveFormatEx))
break;
duration += TimeSpan.FromSeconds (
(double) size / (double)
((WaveFormatEx) codecs [0])
.AverageBytesPerSecond);
break;
// Lists are used to store a variety of data
// collections. Read the type and act on it.
case "LIST":
{
switch (ReadBlock (4).ToString (StringType.UTF8))
{
// "hdlr" is used by AVI files to hold
// a media header and BitmapInfoHeader
// and WaveFormatEx structures.
case "hdrl":
if (style == ReadStyle.None ||
stream_format != "AVI ")
continue;
AviHeaderList header_list =
new AviHeaderList (this,
position + 12,
(int) (size - 4));
duration = header_list.Header.Duration;
codecs = header_list.Codecs;
break;
// "INFO" is a tagging format handled by
// the InfoTag class.
case "INFO":
if (read_tags && info_tag == null)
info_tag = new InfoTag (
this,
position + 12,
(int) (size - 4));
tag_found = true;
break;
// "MID " is a tagging format handled by
// the MovieIdTag class.
case "MID ":
if (read_tags && mid_tag == null)
mid_tag = new MovieIdTag (
this,
position + 12,
(int) (size - 4));
tag_found = true;
break;
// "movi" contains the media data for
// and AVI and its contents represent
// the invariant portion of the file.
case "movi":
if (stream_format != "AVI ")
break;
InvariantStartPosition = position;
InvariantEndPosition = position + size;
break;
}
break;
}
// "ID32" is a custom box for this format that
// contains an ID3v2 tag.
case "ID32":
if (read_tags && id32_tag == null)
id32_tag = new Id3v2.Tag (this,
position + 8);
tag_found = true;
break;
// "IDVX" is used by DivX and holds an ID3v1-
// style tag.
case "IDVX":
if (read_tags && divx_tag == null)
divx_tag = new DivXTag (this,
position + 8);
tag_found = true;
break;
// "JUNK" is a padding element that could be
// associated with tag data.
case "JUNK":
if (tag_end == position)
tag_end = position + 8 + size;
break;
}
// Determine the region of the file that
// contains tags.
if (tag_found) {
if (tag_start == -1) {
tag_start = position;
tag_end = position + 8 + size;
} else if (tag_end == position) {
tag_end = position + 8 + size;
}
}
// Move to the next item.
} while ((position += 8 + size) + 8 < length);
// If we're reading properties, and one were found,
// throw an exception. Otherwise, create the Properties
// object.
if (style != ReadStyle.None) {
if (codecs.Length == 0)
throw new UnsupportedFormatException (
"Unsupported RIFF type.");
properties = new Properties (duration, codecs);
}
// If we're reading tags, update the combined tag.
if (read_tags)
tag.SetTags (id32_tag, info_tag, mid_tag, divx_tag);
}
/// <summary>
/// Reads the contents of the current instance determining
/// the size of the riff data, the area the tagging is in,
/// and optionally reading in the tags and media properties.
/// </summary>
/// <param name="read_tags">
/// If <see langword="true" />, any tags found will be read
/// into the current instance.
/// </param>
/// <param name="style">
/// A <see cref="ReadStyle"/> value specifying how the media
/// data is to be read into the current instance.
/// </param>
/// <param name="riff_size">
/// A <see cref="uint"/> value reference to be filled with
/// the size of the RIFF data as read from the file.
/// </param>
/// <param name="tag_start">
/// A <see cref="long" /> value reference to be filled with
/// the absolute seek position at which the tagging data
/// starts.
/// </param>
/// <param name="tag_end">
/// A <see cref="long" /> value reference to be filled with
/// the absolute seek position at which the tagging data
/// ends.
/// </param>
/// <exception cref="CorruptFileException">
/// The file does not begin with <see cref="FileIdentifier"
/// />.
/// </exception>
private void Read(bool read_tags, ReadStyle style,
out uint riff_size, out long tag_start,
out long tag_end)
{
Seek(0);
if (ReadBlock(4) != FileIdentifier)
{
throw new CorruptFileException(
"File does not begin with RIFF identifier");
}
riff_size = ReadBlock(4).ToUInt(false);
ByteVector stream_format = ReadBlock(4);
tag_start = -1;
tag_end = -1;
long position = 12;
long length = Length;
uint size = 0;
TimeSpan duration = TimeSpan.Zero;
ICodec [] codecs = new ICodec [0];
// Read until there are less than 8 bytes to read.
do
{
bool tag_found = false;
Seek(position);
string fourcc = ReadBlock(4).ToString(StringType.UTF8);
size = ReadBlock(4).ToUInt(false);
switch (fourcc)
{
// "fmt " is used by Wave files to hold the
// WaveFormatEx structure.
case "fmt ":
if (style == ReadStyle.None ||
stream_format != "WAVE")
{
break;
}
Seek(position + 8);
codecs = new ICodec [] {
new WaveFormatEx(ReadBlock(18), 0)
};
break;
// "data" contains the audio data for wave
// files. It's contents represent the invariant
// portion of the file and is used to determine
// the duration of a file. It should always
// appear after "fmt ".
case "data":
if (stream_format != "WAVE")
{
break;
}
InvariantStartPosition = position;
InvariantEndPosition = position + size;
if (style == ReadStyle.None ||
codecs.Length != 1 ||
!(codecs [0] is WaveFormatEx))
{
break;
}
duration += TimeSpan.FromSeconds(
(double)size / (double)
((WaveFormatEx)codecs [0])
.AverageBytesPerSecond);
break;
// Lists are used to store a variety of data
// collections. Read the type and act on it.
case "LIST":
{
switch (ReadBlock(4).ToString(StringType.UTF8))
{
// "hdlr" is used by AVI files to hold
// a media header and BitmapInfoHeader
// and WaveFormatEx structures.
case "hdrl":
if (style == ReadStyle.None ||
stream_format != "AVI ")
{
continue;
}
AviHeaderList header_list =
new AviHeaderList(this,
position + 12,
(int)(size - 4));
duration = header_list.Header.Duration;
codecs = header_list.Codecs;
break;
// "INFO" is a tagging format handled by
// the InfoTag class.
case "INFO":
if (read_tags && info_tag == null)
{
info_tag = new InfoTag(
this,
position + 12,
(int)(size - 4));
}
tag_found = true;
break;
// "MID " is a tagging format handled by
// the MovieIdTag class.
case "MID ":
if (read_tags && mid_tag == null)
{
mid_tag = new MovieIdTag(
this,
position + 12,
(int)(size - 4));
}
tag_found = true;
break;
// "movi" contains the media data for
// and AVI and its contents represent
// the invariant portion of the file.
case "movi":
if (stream_format != "AVI ")
{
break;
}
InvariantStartPosition = position;
InvariantEndPosition = position + size;
break;
}
break;
}
// "ID32" is a custom box for this format that
// contains an ID3v2 tag.
case "ID32":
if (read_tags && id32_tag == null)
{
id32_tag = new Id3v2.Tag(this,
position + 8);
}
tag_found = true;
break;
// "IDVX" is used by DivX and holds an ID3v1-
// style tag.
case "IDVX":
if (read_tags && divx_tag == null)
{
divx_tag = new DivXTag(this,
position + 8);
}
tag_found = true;
break;
// "JUNK" is a padding element that could be
// associated with tag data.
case "JUNK":
if (tag_end == position)
{
tag_end = position + 8 + size;
}
break;
}
// Determine the region of the file that
// contains tags.
if (tag_found)
{
if (tag_start == -1)
{
tag_start = position;
tag_end = position + 8 + size;
}
else if (tag_end == position)
{
tag_end = position + 8 + size;
}
}
// Move to the next item.
} while ((position += 8 + (long)size) + 8 < length);
// If we're reading properties, and one were found,
// throw an exception. Otherwise, create the Properties
// object.
if (style != ReadStyle.None)
{
if (codecs.Length == 0)
{
throw new UnsupportedFormatException(
"Unsupported RIFF type.");
}
properties = new Properties(duration, codecs);
}
// If we're reading tags, update the combined tag.
if (read_tags)
{
tag.SetTags(id32_tag, info_tag, mid_tag, divx_tag);
}
}
private void Read(bool read_tags, ReadStyle style, out uint riff_size, out long tag_start, out long tag_end)
{
bool flag;
base.Seek(0L);
if (base.ReadBlock(4) != FileIdentifier)
{
throw new CorruptFileException("File does not begin with RIFF identifier");
}
riff_size = base.ReadBlock(4).ToUInt(false);
ByteVector vector = base.ReadBlock(4);
tag_start = -1L;
tag_end = -1L;
long offset = 12L;
long length = base.Length;
uint num3 = 0;
TimeSpan zero = TimeSpan.Zero;
ICodec[] codecs = new ICodec[0];
Label_0066:
flag = false;
base.Seek(offset);
string str = base.ReadBlock(4).ToString(StringType.UTF8);
num3 = base.ReadBlock(4).ToUInt(false);
string key = str;
if (key != null)
{
Dictionary<string, int> dictionary;
int num4;
if (<>f__switch$map3 == null)
{
dictionary = new Dictionary<string, int>(6);
dictionary.Add("fmt ", 0);
dictionary.Add("data", 1);
dictionary.Add("LIST", 2);
dictionary.Add("ID32", 3);
dictionary.Add("IDVX", 4);
dictionary.Add("JUNK", 5);
<>f__switch$map3 = dictionary;
}
if (<>f__switch$map3.TryGetValue(key, out num4))
{
switch (num4)
{
case 0:
if ((style != ReadStyle.None) && (vector == "WAVE"))
{
base.Seek(offset + 8L);
codecs = new ICodec[] { new WaveFormatEx(base.ReadBlock(0x12), 0) };
break;
}
break;
case 1:
if (vector == "WAVE")
{
base.InvariantStartPosition = offset;
base.InvariantEndPosition = offset + num3;
if (((style != ReadStyle.None) && (codecs.Length == 1)) && (codecs[0] is WaveFormatEx))
{
WaveFormatEx ex = (WaveFormatEx) codecs[0];
zero += TimeSpan.FromSeconds(((double) num3) / ((double) ex.AverageBytesPerSecond));
}
break;
}
break;
case 2:
{
string str3 = base.ReadBlock(4).ToString(StringType.UTF8);
if (str3 != null)
{
int num5;
if (<>f__switch$map2 == null)
{
dictionary = new Dictionary<string, int>(4);
dictionary.Add("hdrl", 0);
dictionary.Add("INFO", 1);
dictionary.Add("MID ", 2);
dictionary.Add("movi", 3);
<>f__switch$map2 = dictionary;
}
if (<>f__switch$map2.TryGetValue(str3, out num5))
{
switch (num5)
{
case 0:
if ((style != ReadStyle.None) && (vector == "AVI "))
{
AviHeaderList list = new AviHeaderList(this, offset + 12L, ((int) num3) - 4);
zero = list.Header.Duration;
codecs = list.Codecs;
break;
}
goto Label_040E;
case 1:
if (read_tags && (this.info_tag == null))
{
this.info_tag = new InfoTag(this, offset + 12L, ((int) num3) - 4);
}
flag = true;
break;
case 2:
if (read_tags && (this.mid_tag == null))
{
this.mid_tag = new MovieIdTag(this, offset + 12L, ((int) num3) - 4);
}
flag = true;
break;
case 3:
if (vector == "AVI ")
{
base.InvariantStartPosition = offset;
base.InvariantEndPosition = offset + num3;
break;
}
break;
}
}
}
break;
}
case 3:
if (read_tags && (this.id32_tag == null))
{
this.id32_tag = new TagLib.Id3v2.Tag(this, offset + 8L);
}
flag = true;
break;
case 4:
if (read_tags && (this.divx_tag == null))
{
this.divx_tag = new DivXTag(this, offset + 8L);
}
flag = true;
break;
case 5:
if (tag_end == offset)
{
tag_end = (offset + 8L) + num3;
}
break;
}
}
}
if (flag)
{
if (tag_start == -1L)
{
tag_start = offset;
tag_end = (offset + 8L) + num3;
}
else if (tag_end == offset)
{
tag_end = (offset + 8L) + num3;
}
}
Label_040E:
if (((offset += (8 + num3)) + 8L) < length)
{
goto Label_0066;
}
if (style != ReadStyle.None)
{
if (codecs.Length == 0)
{
throw new UnsupportedFormatException("Unsupported RIFF type.");
}
this.properties = new TagLib.Properties(zero, codecs);
}
if (read_tags)
{
TagLib.Tag[] tags = new TagLib.Tag[] { this.id32_tag, this.info_tag, this.mid_tag, this.divx_tag };
this.tag.SetTags(tags);
}
}
private void Read (bool read_tags, ReadStyle style, out uint riff_size, out long tag_start, out long tag_end)
{
Seek (0);
if (ReadBlock (4) != FileIdentifier)
throw new CorruptFileException ("File does not begin with RIFF identifier");
riff_size = ReadBlock (4).ToUInt (false);
ByteVector stream_format = ReadBlock (4);
tag_start = -1;
tag_end = -1;
long position = 12;
long length = Length;
TimeSpan duration = TimeSpan.Zero;
ICodec[] codecs = new ICodec [0];
do
{
bool tag_found = false;
Seek (position);
string fourcc = ReadBlock (4).ToString (StringType.UTF8);
uint size = ReadBlock (4).ToUInt (false);
switch (fourcc)
{
case "fmt ":
if (stream_format == "WAVE" && style != ReadStyle.None)
{
Seek (position + 8);
codecs = new ICodec [] {new WaveFormatEx (ReadBlock (18), 0)};
}
break;
case "data":
if (stream_format == "WAVE") {
if (style != ReadStyle.None && codecs.Length == 1 && codecs [0] is WaveFormatEx)
duration += TimeSpan.FromSeconds ((double) size / (double) ((WaveFormatEx) codecs [0]).AverageBytesPerSecond);
InvariantStartPosition = position;
InvariantEndPosition = position + size;
}
break;
case "LIST":
{
switch (ReadBlock (4).ToString (StringType.UTF8))
{
case "hdrl":
if (stream_format == "AVI " && style != ReadStyle.None)
{
AviHeaderList header_list = new AviHeaderList (this, position + 12, (int) (size - 4));
duration = header_list.Header.Duration;
codecs = header_list.Codecs;
}
break;
case "INFO":
{
if (read_tags && info_tag == null)
info_tag = new InfoTag (this, position + 12, (int) (size - 4));
tag_found = true;
break;
}
case "MID ":
if (read_tags && mid_tag == null)
mid_tag = new MovieIdTag (this, position + 12, (int) (size - 4));
tag_found = true;
break;
case "movi":
if (stream_format == "AVI ") {
InvariantStartPosition = position;
InvariantEndPosition = position + size;
}
break;
}
break;
}
case "ID32":
if (read_tags && id32_tag == null)
id32_tag = new Id3v2.Tag (this, position + 8);
tag_found = true;
break;
case "IDVX":
if (read_tags && divx_tag == null)
divx_tag = new DivXTag (this, position + 8);
tag_found = true;
break;
case "JUNK":
if (tag_end == position)
tag_end = position + 8 + size;
break;
}
if (tag_found)
{
if (tag_start == -1)
{
tag_start = position;
tag_end = position + 8 + size;
}
else if (tag_end == position)
tag_end = position + 8 + size;
}
position += 8 + size;
}
while (position + 8 < length);
if (style != ReadStyle.None)
{
if (codecs.Length == 0)
throw new UnsupportedFormatException ("Unsupported RIFF type.");
properties = new Properties (duration, codecs);
}
if (read_tags)
tag.SetTags (id32_tag, info_tag, mid_tag, divx_tag);
}
private void Read(bool read_tags, ReadStyle style, out uint riff_size, out long tag_start, out long tag_end)
{
Seek(0);
if (ReadBlock(4) != FileIdentifier)
{
throw new CorruptFileException("File does not begin with RIFF identifier");
}
riff_size = ReadBlock(4).ToUInt(false);
ByteVector stream_format = ReadBlock(4);
tag_start = -1;
tag_end = -1;
long position = 12;
long length = Length;
uint size = 0;
TimeSpan duration = TimeSpan.Zero;
ICodec[] codecs = new ICodec[0];
do
{
bool tag_found = false;
Seek(position);
string fourcc = ReadBlock(4).ToString(StringType.UTF8);
size = ReadBlock(4).ToUInt(false);
switch (fourcc)
{
case "fmt ":
if (style == ReadStyle.None || stream_format != "WAVE")
{
break;
}
Seek(position + 8);
codecs = new ICodec[]
{
new WaveFormatEx(ReadBlock(18), 0)
};
break;
case "data":
if (stream_format != "WAVE")
{
break;
}
InvariantStartPosition = position;
InvariantEndPosition = position + size;
if (style == ReadStyle.None || codecs.Length != 1 || !(codecs[0] is WaveFormatEx))
{
break;
}
duration += TimeSpan.FromSeconds((double)size / (double)((WaveFormatEx)codecs[0]).AverageBytesPerSecond);
break;
case "LIST":
{
switch (ReadBlock(4).ToString(StringType.UTF8))
{
case "hdrl":
if (style == ReadStyle.None || stream_format != "AVI ")
{
continue;
}
AviHeaderList header_list = new AviHeaderList(this, position + 12, (int)(size - 4));
duration = header_list.Header.Duration;
codecs = header_list.Codecs;
break;
case "INFO":
if (read_tags && info_tag == null)
{
info_tag = new InfoTag(this, position + 12, (int)(size - 4));
}
tag_found = true;
break;
case "MID ":
if (read_tags && mid_tag == null)
{
mid_tag = new MovieIdTag(this, position + 12, (int)(size - 4));
}
tag_found = true;
break;
case "movi":
if (stream_format != "AVI ")
{
break;
}
InvariantStartPosition = position;
InvariantEndPosition = position + size;
break;
}
break;
}
case "ID32":
if (read_tags && id32_tag == null)
{
id32_tag = new Id3v2.Tag(this, position + 8);
}
tag_found = true;
break;
case "IDVX":
if (read_tags && divx_tag == null)
{
divx_tag = new DivXTag(this, position + 8);
}
tag_found = true;
break;
case "JUNK":
if (tag_end == position)
{
tag_end = position + 8 + size;
}
break;
}
if (tag_found)
{
if (tag_start == -1)
{
tag_start = position;
tag_end = position + 8 + size;
}
else if (tag_end == position)
{
tag_end = position + 8 + size;
}
}
}while((position += 8 + size) + 8 < length);
if (style != ReadStyle.None)
{
if (codecs.Length == 0)
{
throw new UnsupportedFormatException("Unsupported RIFF type.");
}
properties = new Properties(duration, codecs);
}
if (read_tags)
{
tag.SetTags(id32_tag, info_tag, mid_tag, divx_tag);
}
}