public ITagWriter GetWriter()
{
if (_file.Exists)
{
_file.Delete();
}
FileStream stream = _file.Create();
ITagWriter writer = new FlvWriter(stream, false);
writer.WriteHeader();
return(writer);
}
public ITagWriter GetAppendWriter()
{
// If the file doesnt exist, we cant append to it, so return a writer
if (!_file.Exists)
{
#if !SILVERLIGHT
log.Info("File does not exist, calling writer. This will create a new file.");
#endif
return(GetWriter());
}
//FileStream stream = _file.Open(FileMode.Append);
FileStream stream = new FileStream(_file.FullName, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.Read, 65536);
ITagWriter writer = new FlvWriter(stream, true);
return(writer);
}
/// <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();
}