public ITagReader GetReader()
{
FlvReader reader = null;
string fileName = _file.Name;
if (_file.Exists)
{
#if !SILVERLIGHT
if (log.IsDebugEnabled)
{
log.Debug("File size: " + _file.Length);
}
#endif
reader = new FlvReader(_file, _generateMetadata);
}
else
{
#if !SILVERLIGHT
log.Info("Creating new file: " + fileName);
#endif
using (FileStream fs = _file.Create()) { }
_file.Refresh();
reader = new FlvReader(_file, _generateMetadata);
}
return(reader);
}
public Flv(FileInfo file, bool generateMetadata)
{
_file = file;
_generateMetadata = generateMetadata;
int count = 0;
if (!_generateMetadata)
{
try {
FlvReader reader = new FlvReader(_file);
ITag tag = null;
while (reader.HasMoreTags() && (++count < 5))
{
tag = reader.ReadTag();
if (tag.DataType == IOConstants.TYPE_METADATA)
{
if (_metaService == null)
{
_metaService = new MetaService(_file);
}
_metaData = _metaService.ReadMetaData(tag.Body);
}
}
reader.Close();
} catch (Exception ex) {
#if !SILVERLIGHT
log.Error("An error occured looking for metadata:", ex);
#endif
}
}
}
/// <summary>
/// Initiates writing of the Metadata.
/// </summary>
/// <param name="meta">Metadata to write.</param>
public void Write(MetaData meta)
{
// Get cue points, FLV reader and writer
MetaCue[] metaArr = meta.MetaCue;
FlvReader reader = new FlvReader(_file, false);
FlvWriter writer = new FlvWriter(_output, false);
ITag tag = null;
// Read first tag
if (reader.HasMoreTags())
{
tag = reader.ReadTag();
if (tag.DataType == IOConstants.TYPE_METADATA)
{
if (!reader.HasMoreTags())
{
throw new IOException("File we're writing is metadata only?");
}
}
}
meta.Duration = (double)reader.Duration / 1000;
meta.VideoCodecId = reader.VideoCodecId;
meta.AudioCodecId = reader.AudioCodecId;
ITag injectedTag = InjectMetaData(meta, tag);
injectedTag.PreviousTagSize = 0;
tag.PreviousTagSize = injectedTag.BodySize;
writer.WriteHeader();
writer.WriteTag(injectedTag);
writer.WriteTag(tag);
int cuePointTimeStamp = 0;
int counter = 0;
if (metaArr != null)
{
Array.Sort(metaArr);
cuePointTimeStamp = GetTimeInMilliseconds(metaArr[0]);
}
while (reader.HasMoreTags())
{
tag = reader.ReadTag();
// if there are cuePoints in the array
if (counter < metaArr.Length)
{
// If the tag has a greater timestamp than the
// cuePointTimeStamp, then inject the tag
while (tag.Timestamp > cuePointTimeStamp)
{
injectedTag = InjectMetaCue(metaArr[counter], tag);
writer.WriteTag(injectedTag);
tag.PreviousTagSize = injectedTag.BodySize;
// Advance to the next CuePoint
counter++;
if (counter > (metaArr.Length - 1))
{
break;
}
cuePointTimeStamp = GetTimeInMilliseconds(metaArr[counter]);
}
}
if (tag.DataType != IOConstants.TYPE_METADATA)
{
writer.WriteTag(tag);
}
}
writer.Close();
}