public override void Read(BoxReader reader)
{
using (new SizeChecker(this, reader)) {
base.Read(reader);
TrackHeaderBox.Read(reader);
while (this.Size > (ulong)(reader.BaseStream.Position - (long)this.Offset))
{
long pos = reader.BaseStream.Position;
BoxType next = reader.PeekNextBoxType();
if (next == BoxTypes.Edts)
{
EdtsBox = new EdtsBox();
EdtsBox.movieTimeScale = movieTimeScale;
EdtsBox.Read(reader);
}
else if (next == BoxTypes.TrackReference)
{
TrackReferenceBox = new TrackReferenceBox();
TrackReferenceBox.Read(reader);
}
else if (next == BoxTypes.Media)
{
MediaBox = new MediaBox(this);
MediaBox.Read(reader);
}
else
{
Box unknown = new Box(BoxTypes.Any);
unknown.Read(reader);
Debug.WriteLine(string.Format("Unknow box type {0} in Trak box, skipped", next.ToString()));
}
}
}
}
public TrackBox(IsochronousTrackInfo trackInfo)
: this()
{
float height = 0.0f;
float width = 0.0f;
if (trackInfo is RawVideoTrackInfo)
{
// set the TRACK width, which may differ from SampleDescription width and height, depending on Aspect Ratio
RawVideoTrackInfo rvti = (RawVideoTrackInfo)trackInfo;
height = rvti.Height;
width = rvti.Width * ((float)rvti.AspectRatioX / (float)rvti.AspectRatioY);
}
ulong scaledDuration = (ulong)TimeArithmetic.ConvertToTimeScale(trackInfo.MovieTimeScale, trackInfo.DurationIn100NanoSecs);
TrackHeaderBox = new TrackHeaderBox((uint)trackInfo.TrackID, scaledDuration, height, width);
// TrackHeaderBox = new TrackHeaderBox((uint)trackInfo.TrackID, (trackInfo.Duration * oneSecondTicks) / trackInfo.TimeScale, height, width);
this.Size += TrackHeaderBox.Size;
// skip the TrackReferenceBox for now
//TrackReferenceBox = new TrackReferenceBox((uint)trackInfo.TrackID);
//this.Size += TrackReferenceBox.Size;
#if EDTS_OUT
EdtsBox = (EdtsBox)trackInfo.GetEdtsBox();
if (EdtsBox != null)
{
this.Size += EdtsBox.Size;
EdtsBox.ScaleToTarget(trackInfo.MovieTimeScale, trackInfo.TimeScale);
}
#endif
MediaBox = new MediaBox(trackInfo);
// MediaBox.Size can only be determined during FinalizeBox
// NOTE: NO Esds Box
}
public void ScaleToTarget(uint newMovieTimeScale, uint newTrackTimeScale, EdtsBox parent)
{
for (int i = 0; i < entryCount; i++)
{
editList[i].segmentDuration = (ulong)(((decimal)editList[i].segmentDuration / parent.movieTimeScale) * newMovieTimeScale);
editList[i].mediaTime = (long)(((decimal)editList[i].mediaTime / parent.trackTimeScale) * newTrackTimeScale);
}
}
/// <summary>
/// InitSampleStreamFromSampleTableBox
/// Generate the list of StreamDataBlockInfo instances from this SampleTableBox.
/// 1. Call GetStartAndEndAddress;
/// 2. Call InitSampleStreamFromSampleTableBox.
/// </summary>
/// <param name="edtsBox">EdtsBox</param>
/// <param name="sampleTimeScale">uint - sample time scale</param>
/// <param name="startTime">ulong - start time</param>
/// <param name="endTime">ulong - end time</param>
/// <param name="lastEnd">ulong - last end</param>
/// <returns></returns>
public List <StreamDataBlockInfo> InitSampleStreamFromSampleTableBox(EdtsBox edtsBox, uint sampleTimeScale, ulong startTime, ulong endTime, ref ulong lastEnd)
{
uint startIndex, endIndex;
GetStartAndEndIndex(edtsBox, sampleTimeScale, startTime, endTime, out startIndex, out endIndex);
if (endIndex <= startIndex)
{
return(null);
}
return(InitSampleStreamFromSampleTableBox(sampleTimeScale, (int)startIndex, (int)endIndex, ref lastEnd));
}
public override void Write(BoxWriter writer)
{
using (new SizeCalculator(this, writer))
{
base.Write(writer);
TrackHeaderBox.Write(writer);
if (EdtsBox != null)
{
EdtsBox.Write(writer);
//this.Size -= EdtsBox.Size;
}
MediaBox.Write(writer);
if (TrackReferenceBox != null)
{
TrackReferenceBox.Write(writer);
}
}
}
public override string ToString()
{
StringBuilder xml = new StringBuilder();
xml.Append(base.ToString());
xml.Append(TrackHeaderBox.ToString());
if (MediaBox != null)
{
xml.Append(MediaBox.ToString());
}
if (TrackReferenceBox != null)
{
xml.Append(TrackReferenceBox.ToString());
}
if (EdtsBox != null)
{
xml.Append(EdtsBox.ToString());
}
xml.Append("</box>");
return(xml.ToString());
}
public TrackBox(IsochronousTrackInfo trackInfo)
: this()
{
float height = 0.0f;
float width = 0.0f;
if (trackInfo is RawVideoTrackInfo)
{
// set the TRACK width, which may differ from SampleDescription width and height, depending on Aspect Ratio
RawVideoTrackInfo rvti = (RawVideoTrackInfo)trackInfo;
height = rvti.Height;
width = rvti.Width * ((float)rvti.AspectRatioX / (float)rvti.AspectRatioY);
}
ulong scaledDuration = (ulong)TimeArithmetic.ConvertToTimeScale(trackInfo.MovieTimeScale, trackInfo.DurationIn100NanoSecs);
TrackHeaderBox = new TrackHeaderBox((uint)trackInfo.TrackID, scaledDuration, height, width);
// TrackHeaderBox = new TrackHeaderBox((uint)trackInfo.TrackID, (trackInfo.Duration * oneSecondTicks) / trackInfo.TimeScale, height, width);
this.Size += TrackHeaderBox.Size;
// skip the TrackReferenceBox for now
//TrackReferenceBox = new TrackReferenceBox((uint)trackInfo.TrackID);
//this.Size += TrackReferenceBox.Size;
#if EDTS_OUT
EdtsBox = (EdtsBox)trackInfo.GetEdtsBox();
if (EdtsBox != null)
{
this.Size += EdtsBox.Size;
EdtsBox.ScaleToTarget(trackInfo.MovieTimeScale, trackInfo.TimeScale);
}
#endif
MediaBox = new MediaBox(trackInfo);
// MediaBox.Size can only be determined during FinalizeBox
// NOTE: NO Esds Box
}
public override void Read(BoxReader reader)
{
using (new SizeChecker(this, reader)) {
base.Read(reader);
TrackHeaderBox.Read(reader);
while (this.Size > (ulong)(reader.BaseStream.Position - (long)this.Offset)) {
long pos = reader.BaseStream.Position;
BoxType next = reader.PeekNextBoxType();
if (next == BoxTypes.Edts)
{
EdtsBox = new EdtsBox();
EdtsBox.movieTimeScale = movieTimeScale;
EdtsBox.Read(reader);
}
else if (next == BoxTypes.TrackReference)
{
TrackReferenceBox = new TrackReferenceBox();
TrackReferenceBox.Read(reader);
}
else if (next == BoxTypes.Media)
{
MediaBox = new MediaBox(this);
MediaBox.Read(reader);
}
else
{
Box unknown = new Box(BoxTypes.Any);
unknown.Read(reader);
Debug.WriteLine(string.Format("Unknow box type {0} in Trak box, skipped", next.ToString()));
}
}
}
}
/// <summary>
/// GetStartAndEndIndex
/// Given a start time and an end time, determine the start slice index and end slice index.
/// </summary>
/// <param name="edtsBox"EditsBox></param>
/// <param name="sampleTimeScale">uint - sample time scale</param>
/// <param name="startTime">ulong - start time</param>
/// <param name="endTime">ulong - end time</param>
/// <param name="startIndex">out param: start index</param>
/// <param name="endIndex">out param: end index</param>
private void GetStartAndEndIndex(EdtsBox edtsBox, uint sampleTimeScale, ulong startTime, ulong endTime, out uint startIndex, out uint endIndex)
{
startIndex = 0;
endIndex = 0;
ulong ticksDuration = (ulong)TimeArithmetic.ConvertToStandardUnit(sampleTimeScale, parent.parent.MediaHeaderBox.Duration);
if (edtsBox != null)
{
ticksDuration = (ulong)(edtsBox.GetEditTrackDuration(sampleTimeScale) * (decimal)TimeSpan.TicksPerSecond);
}
if (ticksDuration < startTime)
{
return;
}
DecodingTimeToSampleBox stts = this.DecodingTimeToSampleBox;
SyncSampleMapBox stss = this.SyncSampleMapBox;
uint sampleCount = 0;
ulong timeT = 0;
ulong currScaledT = 0;
ulong prevScaledT = 0;
uint[] counts = stts.SampleCount;
uint[] deltaTimes = stts.SampleDelta;
bool startSet = false;
for (int i = 0; i < stts.EntryCount; i++)
{
for (int j = 0; j < counts[i]; j++)
{
if ((currScaledT >= startTime) && (!startSet) && ((stss == null) || (stss.IsIFrame(sampleCount + 1))))
{
startSet = true;
startIndex = sampleCount + 1;
}
if (((stss == null) || stss.IsIFrame(sampleCount + 2)) && (currScaledT > endTime))
{
endIndex = sampleCount + 1;
break;
} // close of if (currScaledT > endTime)
prevScaledT = currScaledT;
timeT += deltaTimes[i];
sampleCount++;
currScaledT = (ulong)TimeArithmetic.ConvertToStandardUnit(sampleTimeScale, timeT);
} // end of for j
if (endIndex > 0) // end sample found
{
break;
}
} // end of for i
if ((endIndex == 0) && startSet) // end sample not found
{
endIndex = sampleCount + 1;
}
}
/// <summary>
/// GetStartAndEndIndex
/// Given a start time and an end time, determine the start slice index and end slice index.
/// </summary>
/// <param name="edtsBox"EditsBox></param>
/// <param name="sampleTimeScale">uint - sample time scale</param>
/// <param name="startTime">ulong - start time</param>
/// <param name="endTime">ulong - end time</param>
/// <param name="startIndex">out param: start index</param>
/// <param name="endIndex">out param: end index</param>
private void GetStartAndEndIndex(EdtsBox edtsBox, uint sampleTimeScale, ulong startTime, ulong endTime, out uint startIndex, out uint endIndex)
{
startIndex = 0;
endIndex = 0;
ulong ticksDuration = (ulong)TimeArithmetic.ConvertToStandardUnit(sampleTimeScale, parent.parent.MediaHeaderBox.Duration);
if (edtsBox != null)
{
ticksDuration = (ulong)(edtsBox.GetEditTrackDuration(sampleTimeScale) * (decimal)TimeSpan.TicksPerSecond);
}
if (ticksDuration < startTime)
return;
DecodingTimeToSampleBox stts = this.DecodingTimeToSampleBox;
SyncSampleMapBox stss = this.SyncSampleMapBox;
uint sampleCount = 0;
ulong timeT = 0;
ulong currScaledT = 0;
ulong prevScaledT = 0;
uint[] counts = stts.SampleCount;
uint[] deltaTimes = stts.SampleDelta;
bool startSet = false;
for (int i = 0; i < stts.EntryCount; i++)
{
for (int j = 0; j < counts[i]; j++)
{
if ((currScaledT >= startTime) && (!startSet) && ((stss == null) || (stss.IsIFrame(sampleCount + 1))))
{
startSet = true;
startIndex = sampleCount + 1;
}
if (((stss == null) || stss.IsIFrame(sampleCount + 2)) && (currScaledT > endTime))
{
endIndex = sampleCount + 1;
break;
} // close of if (currScaledT > endTime)
prevScaledT = currScaledT;
timeT += deltaTimes[i];
sampleCount++;
currScaledT = (ulong)TimeArithmetic.ConvertToStandardUnit(sampleTimeScale, timeT);
} // end of for j
if (endIndex > 0) // end sample found
break;
} // end of for i
if ((endIndex == 0) && startSet) // end sample not found
{
endIndex = sampleCount + 1;
}
}
/// <summary>
/// InitSampleStreamFromSampleTableBox
/// Generate the list of StreamDataBlockInfo instances from this SampleTableBox.
/// 1. Call GetStartAndEndAddress;
/// 2. Call InitSampleStreamFromSampleTableBox.
/// </summary>
/// <param name="edtsBox">EdtsBox</param>
/// <param name="sampleTimeScale">uint - sample time scale</param>
/// <param name="startTime">ulong - start time</param>
/// <param name="endTime">ulong - end time</param>
/// <param name="lastEnd">ulong - last end</param>
/// <returns></returns>
public List<StreamDataBlockInfo> InitSampleStreamFromSampleTableBox(EdtsBox edtsBox, uint sampleTimeScale, ulong startTime, ulong endTime, ref ulong lastEnd)
{
uint startIndex, endIndex;
GetStartAndEndIndex(edtsBox, sampleTimeScale, startTime, endTime, out startIndex, out endIndex);
if (endIndex <= startIndex)
return null;
return InitSampleStreamFromSampleTableBox(sampleTimeScale, (int)startIndex, (int)endIndex, ref lastEnd);
}
public void ScaleToTarget(uint newMovieTimeScale, uint newTrackTimeScale, EdtsBox parent)
{
for (int i = 0; i < entryCount; i++)
{
editList[i].segmentDuration = (ulong)(((decimal)editList[i].segmentDuration / parent.movieTimeScale) * newMovieTimeScale);
editList[i].mediaTime = (long)(((decimal)editList[i].mediaTime / parent.trackTimeScale) * newTrackTimeScale);
}
}
