private void ParseKeyframes(XmlReader r)
{
// TODO: catch empty tag <Keyframes/>.
// Note: unlike chrono and tracks, keyframes are "merged" into existing keyframes if one already exists at the same position.
// This has an impact on how we add drawings.
// We keep the drawings internally to the keyframe during the parse, and only perform the post-drawing init at the end,
// when the keyframe is merge-inserted into the collection.
// For chrono and tracks on the other hand, we perform the post-drawing init on the fly during the parse.
r.ReadStartElement();
while (r.NodeType == XmlNodeType.Element)
{
if (r.Name == "Keyframe")
{
Keyframe keyframe = KeyframeSerializer.Deserialize(r, GetScaling(), RemapTimestamp, metadata);
if (keyframe != null)
{
metadata.MergeInsertKeyframe(keyframe);
}
}
else
{
string unparsed = r.ReadOuterXml();
log.DebugFormat("Unparsed content in KVA XML: {0}", unparsed);
}
}
r.ReadEndElement();
}
/// <summary>
/// Create a keyframe and a label to host the subtitle.
/// </summary>
private static void AddSubtitle(Metadata metadata, int start, int end, string content)
{
long startTs = (long)(start * metadata.AverageTimeStampsPerSecond / 1000.0f);
long endTs = (long)(end * metadata.AverageTimeStampsPerSecond / 1000.0f);
// Make sure the keyframe timestamps corresponds to an actual video frame.
long startFrame = (long)Math.Round((float)startTs / metadata.AverageTimeStampsPerFrame);
startTs = startFrame * metadata.AverageTimeStampsPerFrame;
long endFrame = (long)Math.Round((float)endTs / metadata.AverageTimeStampsPerFrame);
endTs = endFrame * metadata.AverageTimeStampsPerFrame;
Guid id = Guid.NewGuid();
long position = startTs;
string title = null;
string timecode = start.ToString();
string comments = "";
List <AbstractDrawing> drawings = new List <AbstractDrawing>();
// Create a label object.
float top = metadata.ImageSize.Height * 0.75f;
PointF location = new PointF(200, top);
DrawingText drawing = new DrawingText(location, startTs, metadata.AverageTimeStampsPerFrame, content);
drawing.Name = "Subtitle";
drawing.InfosFading.UseDefault = false;
drawing.InfosFading.ReferenceTimestamp = position;
drawing.InfosFading.AverageTimeStampsPerFrame = metadata.AverageTimeStampsPerFrame;
drawing.InfosFading.AlwaysVisible = false;
drawing.InfosFading.OpaqueFrames = (int)((endTs - startTs) / (float)metadata.AverageTimeStampsPerFrame);
drawing.InfosFading.FadingFrames = 10;
// FIXME: there seems to be an issue with style element .Value modification.
//StyleElementFontSize styleElement = label.DrawingStyle.Elements["font size"] as StyleElementFontSize;
//if (styleElement != null)
//{
// styleElement.Value = 24;
// label.DrawingStyle.RaiseValueChanged();
//}
drawings.Add(drawing);
Keyframe keyframe = new Keyframe(id, position, title, timecode, comments, drawings, metadata);
metadata.MergeInsertKeyframe(keyframe);
}
private static void ParseFile(string source, Metadata metadata, int frameNumber)
{
string json = File.ReadAllText(source);
OpenPoseFrame frame;
try
{
frame = JsonConvert.DeserializeObject <OpenPoseFrame>(json);
}
catch (Exception e)
{
log.ErrorFormat(e.Message);
return;
}
long timestamp = metadata.FirstTimeStamp + (frameNumber * metadata.AverageTimeStampsPerFrame);
List <AbstractDrawing> drawings = new List <AbstractDrawing>();
foreach (OpenPosePerson person in frame.people)
{
AbstractDrawing drawing = CreateDrawing(metadata, timestamp, person);
if (drawing != null)
{
drawings.Add(drawing);
}
}
// Create a keyframe and add the drawings to it.
Guid id = Guid.NewGuid();
long position = timestamp;
string title = null;
string timecode = null;
string comments = "";
Keyframe keyframe = new Keyframe(id, position, title, timecode, comments, drawings, metadata);
metadata.MergeInsertKeyframe(keyframe);
}