public static async Task <SampleDescriptionBox> CreateAsync(IBinaryStream stream, Box box)
{
var stsdBox = new SampleDescriptionBox();
stream.Position = box.Offset + 8;
stsdBox.Version = await stream.ReadByteAsync().ConfigureAwait(false);
stsdBox.Flags = await stream.ReadInt32Async(3, ByteOrder.BigEndian).ConfigureAwait(false);
var entriesAmount = await stream.ReadInt32Async(ByteOrder.BigEndian).ConfigureAwait(false);
for (var i = 0; i < entriesAmount; i++)
{
var sampleDescriptionSize = await stream.ReadUInt32Async(ByteOrder.BigEndian).ConfigureAwait(false);
var dataFormat = await stream.ReadStringAsync(4).ConfigureAwait(false);
stream.Position += 6;
var dataReferenceIndex = await stream.ReadUInt16Async(ByteOrder.BigEndian).ConfigureAwait(false);
stsdBox.Table.Add(new TableEntry(sampleDescriptionSize, dataFormat, dataReferenceIndex));
/*var version = await stream.ReadUInt16Async(ByteOrder.BigEndian).ConfigureAwait(false);
* var revision = await stream.ReadUInt16Async(ByteOrder.BigEndian).ConfigureAwait(false);
* var vendor = await stream.ReadUInt32Async(ByteOrder.BigEndian).ConfigureAwait(false);
* var channels = await stream.ReadUInt16Async(ByteOrder.BigEndian).ConfigureAwait(false);
* var sampleSize = await stream.ReadUInt16Async(ByteOrder.BigEndian).ConfigureAwait(false);
* var compressionId = await stream.ReadUInt16Async(ByteOrder.BigEndian).ConfigureAwait(false);
* var packetSize = await stream.ReadUInt16Async(ByteOrder.BigEndian).ConfigureAwait(false);
* var sampleRate = await stream.ReadUInt16Async(ByteOrder.BigEndian).ConfigureAwait(false);*/
}
return(stsdBox);
}
internal static async Task <Box> ReadBoxAsync(IBinaryStream stream, UInt32 maxPosition)
{
var boxes = new List <Box>();
var offset = stream.Position;
var length = await stream.ReadUInt32Async(ByteOrder.BigEndian).ConfigureAwait(false);
if ((length < 8) || (stream.Position + length - 4 > maxPosition))
{
return(null);
}
var name = await stream.ReadStringAsync(4).ConfigureAwait(false);
if (name == "meta")
{
var version = await stream.ReadByteAsync().ConfigureAwait(false);
var flags = await stream.ReadInt32Async(3, ByteOrder.BigEndian).ConfigureAwait(false);
}
var thisBoxMaxPosition = offset + length;
while (stream.Position < thisBoxMaxPosition)
{
var box = await ReadBoxAsync(stream, thisBoxMaxPosition).ConfigureAwait(false);
if (box == null)
{
boxes.Clear();
stream.Position = thisBoxMaxPosition;
break;
}
boxes.Add(box);
}
return(new Box(offset, length, name, boxes));
}
public static async Task <SampleSizeBox> CreateAsync(IBinaryStream stream, Box box)
{
var stcoBox = new SampleSizeBox();
stream.Position = box.Offset + 8;
stcoBox.Version = await stream.ReadByteAsync().ConfigureAwait(false);
stcoBox.Flags = await stream.ReadInt32Async(3, ByteOrder.BigEndian).ConfigureAwait(false);
var uniformSizeOfSample = await stream.ReadInt32Async(ByteOrder.BigEndian).ConfigureAwait(false);
var entriesAmount = await stream.ReadInt32Async(ByteOrder.BigEndian).ConfigureAwait(false);
for (var i = 0; i < entriesAmount; i++)
{
stcoBox.Table.Add(await stream.ReadUInt32Async(ByteOrder.BigEndian).ConfigureAwait(false));
}
return(stcoBox);
}
public static async Task <TimeToSampleBox> CreateAsync(IBinaryStream stream, Box box)
{
var sttsBox = new TimeToSampleBox();
stream.Position = box.Offset + 8;
sttsBox.Version = await stream.ReadByteAsync().ConfigureAwait(false);
sttsBox.Flags = await stream.ReadInt32Async(3, ByteOrder.BigEndian).ConfigureAwait(false);
var entriesAmount = await stream.ReadInt32Async(ByteOrder.BigEndian).ConfigureAwait(false);
for (var i = 0; i < entriesAmount; i++)
{
var sampleCount = await stream.ReadUInt32Async(ByteOrder.BigEndian).ConfigureAwait(false);
var sampleDuration = await stream.ReadUInt32Async(ByteOrder.BigEndian).ConfigureAwait(false);
sttsBox.Table.Add(new TableEntry(sampleCount, sampleDuration));
}
return(sttsBox);
}
public static async Task <MediaHeaderBox> CreateAsync(IBinaryStream stream, Box box)
{
var mdhdBox = new MediaHeaderBox();
stream.Position = box.Offset + 8;
mdhdBox.Version = await stream.ReadByteAsync().ConfigureAwait(false);
mdhdBox.Flags = await stream.ReadInt32Async(3, ByteOrder.BigEndian).ConfigureAwait(false);
mdhdBox.CreationTime = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc).AddSeconds(await stream.ReadInt32Async(ByteOrder.BigEndian).ConfigureAwait(false)).ToLocalTime();
mdhdBox.ModificationTime = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc).AddSeconds(await stream.ReadInt32Async(ByteOrder.BigEndian).ConfigureAwait(false)).ToLocalTime();
mdhdBox.TimeScale = await stream.ReadInt32Async(ByteOrder.BigEndian).ConfigureAwait(false);
mdhdBox.Duration = await stream.ReadInt32Async(ByteOrder.BigEndian).ConfigureAwait(false);
mdhdBox.Language = await stream.ReadInt16Async(ByteOrder.BigEndian).ConfigureAwait(false);
mdhdBox.Quality = await stream.ReadInt16Async(ByteOrder.BigEndian).ConfigureAwait(false);
return(mdhdBox);
}
public static async Task <SampleToChunkBox> CreateAsync(IBinaryStream stream, Box box)
{
var stscBox = new SampleToChunkBox();
stream.Position = box.Offset + 8;
stscBox.Version = await stream.ReadByteAsync().ConfigureAwait(false);
stscBox.Flags = await stream.ReadInt32Async(3, ByteOrder.BigEndian).ConfigureAwait(false);
var entriesAmount = await stream.ReadInt32Async(ByteOrder.BigEndian).ConfigureAwait(false);
for (var i = 0; i < entriesAmount; i++)
{
var firstChunk = await stream.ReadUInt32Async(ByteOrder.BigEndian).ConfigureAwait(false);
var samplesPerChunk = await stream.ReadUInt32Async(ByteOrder.BigEndian).ConfigureAwait(false);
var sampleDescriptionId = await stream.ReadUInt32Async(ByteOrder.BigEndian).ConfigureAwait(false);
stscBox.Table.Add(new TableEntry(firstChunk, samplesPerChunk, sampleDescriptionId));
}
return(stscBox);
}
public static async Task <MetadataBox> CreateAsync(IBinaryStream stream, Box box)
{
var metadataBox = new MetadataBox();
stream.Position = box.Offset + 8;
metadataBox.Version = await stream.ReadByteAsync().ConfigureAwait(false);
metadataBox.Flags = await stream.ReadInt32Async(3, ByteOrder.BigEndian).ConfigureAwait(false);
var boxes = new List <Box>();
while (stream.Position < box.Offset + box.Length)
{
var subBox = await Mpeg4File.ReadBoxAsync(stream, box.Offset + box.Length).ConfigureAwait(false);
if (subBox != null)
{
metadataBox.Boxes.Add(subBox);
}
}
return(metadataBox);
}