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;
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);
}
