void InitializeSampleCountsInChunk(int trackIndex)
{
SampleCountsInChunk[trackIndex] = new List <uint>();
SampleCountsInChunk[trackIndex].Clear();
TrackBox[] tracks = this.mmb.TrackBoxes;
SampleTableBox sampleTable = tracks[trackIndex].MediaBox.MediaInformationBox.SampleTableBox;
SampleToChunkBox stsc = sampleTable.SampleToChunkBox;
uint totalChunks = sampleTable.ChunkOffSetBox.EntryCount;
int chunkEntryIndex;
uint samplesPerChunk;
for (chunkEntryIndex = 0; chunkEntryIndex < (stsc.EntryCount - 1); chunkEntryIndex++)
{
for (uint chunkCount = stsc.ChunkEntries[chunkEntryIndex].firstChunk; chunkCount < stsc.ChunkEntries[chunkEntryIndex + 1].firstChunk;
chunkCount++)
{
samplesPerChunk = stsc.ChunkEntries[chunkEntryIndex].samplesPerChunk;
SampleCountsInChunk[trackIndex].Add(samplesPerChunk);
}
}
uint remainingChunkCount = (uint)sampleTable.ChunkOffSetBox.ChunkOffsets.Length - stsc.ChunkEntries[chunkEntryIndex].firstChunk + 1;
samplesPerChunk = stsc.ChunkEntries[chunkEntryIndex].samplesPerChunk;
for (; remainingChunkCount > 0; remainingChunkCount--)
{
SampleCountsInChunk[trackIndex].Add(samplesPerChunk);
}
}
/// <summary>
/// Constructor to use when building the box from scratch.
/// NOTE: We don't compute the Size of this box in this constructor.
/// The Size of this box is computed during FinalizeBox.
/// NOTE: The ordering of the sub-boxes is not determined in the constructor.
/// Writing out the sub-boxes (see the Write method below) determines the order of sub-boxes.
/// </summary>
/// <param name="inParent">MediaInformationBox</param>
/// <param name="trackInfo">IsochronousTrackInfo</param>
public SampleTableBox(MediaInformationBox inParent, IsochronousTrackInfo trackInfo)
: this(inParent)
{
CTTSOut = trackInfo.CTTSOut;
fragmented = trackInfo.IsFragment;
SampleDescriptionsBox = new SampleDescriptionsBox(this, trackInfo);
DecodingTimeToSampleBox = new DecodingTimeToSampleBox(this);
SampleToChunkBox = new SampleToChunkBox(this);
SampleSizeBox = new SampleSizeBox(this);
ChunkOffSetBox = new ChunkOffSetBox(this);
if ((trackInfo is RawVideoTrackInfo) && !fragmented)
{
SyncSampleMapBox = new SyncSampleMapBox();
//CompositionTimeToSample = new CompositionTimeToSample(this);
}
}
/// <summary>
/// Read - read in the SampleTableBox from the input MP4 file.
/// Sub-boxes can come in in any order.
/// </summary>
/// <param name="reader">BoxReader</param>
public override void Read(BoxReader reader)
{
using (new SizeChecker(this, reader)) {
base.Read(reader);
while (reader.BaseStream.Position < (long)(this.Size + this.Offset))
{
long pos = reader.BaseStream.Position;
Box test = new Box(BoxTypes.Any);
test.Read(reader);
reader.BaseStream.Position = pos;
if (test.Type == BoxTypes.TimeToSample)
{
this.DecodingTimeToSampleBox = new DecodingTimeToSampleBox(this);
DecodingTimeToSampleBox.Read(reader);
}
else if (test.Type == BoxTypes.CompositionOffset)
{
this.CompositionTimeToSample = new CompositionTimeToSample(this);
CompositionTimeToSample.Read(reader);
}
else if (test.Type == BoxTypes.SampleDescription)
{
this.SampleDescriptionsBox = new SampleDescriptionsBox(this);
SampleDescriptionsBox.Read(reader);
}
else if (test.Type == BoxTypes.SampleToChunk)
{
this.SampleToChunkBox = new SampleToChunkBox(this);
SampleToChunkBox.Read(reader);
}
else if (test.Type == BoxTypes.SampleSize)
{
this.SampleSizeBox = new SampleSizeBox(this);
SampleSizeBox.Read(reader);
}
else if (test.Type == BoxTypes.ChunkOffset) // FIXME: this can be a "co64" box
{
this.ChunkOffSetBox = new ChunkOffSetBox(this);
ChunkOffSetBox.Read(reader);
}
else if (test.Type == BoxTypes.SyncSampleMap)
{
this.SyncSampleMapBox = new SyncSampleMapBox();
SyncSampleMapBox.Read(reader);
}
else
{
reader.BaseStream.Position = (long)(test.Size + test.Offset); // skip unknown box
Debug.WriteLine(string.Format("Unknown box type {0} in SampleTableBox (stbl), skipped", test.Type.ToString()));
}
} // end of while
if (SampleToChunkBox != null)
{
SampleToChunkBox.CheckIntegrityOfChunkData();
}
}
}
/// <summary>
/// Constructor to use when building the box from scratch.
/// NOTE: We don't compute the Size of this box in this constructor.
/// The Size of this box is computed during FinalizeBox.
/// NOTE: The ordering of the sub-boxes is not determined in the constructor.
/// Writing out the sub-boxes (see the Write method below) determines the order of sub-boxes.
/// </summary>
/// <param name="inParent">MediaInformationBox</param>
/// <param name="trackInfo">IsochronousTrackInfo</param>
public SampleTableBox(MediaInformationBox inParent, IsochronousTrackInfo trackInfo)
: this(inParent)
{
CTTSOut = trackInfo.CTTSOut;
fragmented = trackInfo.IsFragment;
SampleDescriptionsBox = new SampleDescriptionsBox(this, trackInfo);
DecodingTimeToSampleBox = new DecodingTimeToSampleBox(this);
SampleToChunkBox = new SampleToChunkBox(this);
SampleSizeBox = new SampleSizeBox(this);
ChunkOffSetBox = new ChunkOffSetBox(this);
if ((trackInfo is RawVideoTrackInfo) && !fragmented)
{
SyncSampleMapBox = new SyncSampleMapBox();
//CompositionTimeToSample = new CompositionTimeToSample(this);
}
}
/// <summary>
/// Read - read in the SampleTableBox from the input MP4 file.
/// Sub-boxes can come in in any order.
/// </summary>
/// <param name="reader">BoxReader</param>
public override void Read(BoxReader reader)
{
using (new SizeChecker(this, reader)) {
base.Read(reader);
while (reader.BaseStream.Position < (long)(this.Size + this.Offset)) {
long pos = reader.BaseStream.Position;
Box test = new Box(BoxTypes.Any);
test.Read(reader);
reader.BaseStream.Position = pos;
if (test.Type == BoxTypes.TimeToSample) {
this.DecodingTimeToSampleBox = new DecodingTimeToSampleBox(this);
DecodingTimeToSampleBox.Read(reader);
}
else if (test.Type == BoxTypes.CompositionOffset) {
this.CompositionTimeToSample = new CompositionTimeToSample(this);
CompositionTimeToSample.Read(reader);
}
else if (test.Type == BoxTypes.SampleDescription) {
this.SampleDescriptionsBox = new SampleDescriptionsBox(this);
SampleDescriptionsBox.Read(reader);
}
else if (test.Type == BoxTypes.SampleToChunk) {
this.SampleToChunkBox = new SampleToChunkBox(this);
SampleToChunkBox.Read(reader);
}
else if (test.Type == BoxTypes.SampleSize) {
this.SampleSizeBox = new SampleSizeBox(this);
SampleSizeBox.Read(reader);
}
else if (test.Type == BoxTypes.ChunkOffset) { // FIXME: this can be a "co64" box
this.ChunkOffSetBox = new ChunkOffSetBox(this);
ChunkOffSetBox.Read(reader);
}
else if (test.Type == BoxTypes.SyncSampleMap)
{
this.SyncSampleMapBox = new SyncSampleMapBox();
SyncSampleMapBox.Read(reader);
}
else
{
reader.BaseStream.Position = (long)(test.Size + test.Offset); // skip unknown box
Debug.WriteLine(string.Format("Unknown box type {0} in SampleTableBox (stbl), skipped", test.Type.ToString()));
}
} // end of while
if (SampleToChunkBox != null)
SampleToChunkBox.CheckIntegrityOfChunkData();
}
}
