public override bool Parse(AviParser parser)
{
if (!base.Parse(parser))
{
return(false);
}
parser.GetInt(Attribute.TotalFrames);
return(Valid);
}
public override bool Parse(AviParser parser)
{
// Call the Parse method of the parent to initialise the header and
// allow parsing the containing header if there is one.
if (!base.Parse(parser))
{
return(false);
}
FileType = parser.GetFourCC(Attribute.FileType); // 'AVI ' or 'AVIX'
return(Valid);
}
public override bool Parse(AviParser parser)
{
uint maxStreamNameLength = (uint)AviDetector.Configurable[AviDetector.ConfigurationKey.AviStreamNameMaxNameLength];
if (!base.Parse(parser))
{
return(false);
}
if (parser.BytesRemaining > maxStreamNameLength)
{
return(false); // Sanity check
}
parser.GetString(Attribute.Name, parser.BytesRemaining);
return(Valid);
}
public override bool Parse(AviParser parser)
{
if (!base.Parse(parser))
{
return(false);
}
uint maxDateStringLength = (uint)AviDetector.Configurable[AviDetector.ConfigurationKey.DigitizingDateMaxDateStringLength];
if (parser.BytesRemaining > maxDateStringLength)
{
return(false);
}
parser.GetString(Attribute.DateTime, parser.BytesRemaining);
return(Valid);
}
public override bool Parse(AviParser parser)
{
if (!base.Parse(parser))
{
return(false);
}
parser.GetInt(Attribute.MicroSecPerFrame);
parser.GetInt(Attribute.MaxBytesPerSec);
parser.GetInt(Attribute.PaddingGranularity);
parser.GetInt(Attribute.Flags);
// TODO parse flags
// • AVIF_HASINDEX
// The file has an index
// • AVIF_MUSTUSEINDEX
// The order in which the video and audio chunks must be replayed is determined by the
// index and may differ from the order in which those chunks occur in the file.
// • AVIF_ISINTERLEAVED
// The streams are properly interleaved into each other
// • AVIF_WASCAPTUREFILE
// The file was captured. The interleave might be weird.
// • AVIF_COPYRIGHTED
// Ignore it
// • AVIF_TRUSTCKTYPE (Open-DML only!)
// This flag indicates that the keyframe flags in the index are reliable. If this flag is not
// set in an Open-DML file, the keyframe flags could be defective without technically
// rendering the file invalid.
parser.GetInt(Attribute.TotalFrames);
parser.GetInt(Attribute.InitialFrames);
parser.GetInt(Attribute.Streams);
parser.GetInt(Attribute.SuggestedBufferSize);
parser.GetInt(Attribute.Width);
parser.GetInt(Attribute.Height);
parser.GetInt(Attribute.Reserved);
parser.GetInt(Attribute.Reserved);
parser.GetInt(Attribute.Reserved);
parser.GetInt(Attribute.Reserved);
return(Valid);
}
public override bool Parse(AviParser parser)
{
if (!base.Parse(parser))
{
return(false);
}
const int IntFieldsCount = 17;
const int ExpectedSize = IntFieldsCount * sizeof(int);
if (Size < ExpectedSize) // invalidate the size attribute
{
parser.CheckAttribute(AviChunk.Attribute.Size, Size == ExpectedSize, false);
}
else if (Size > ExpectedSize) // invalidate the complete header
{
parser.CheckAttribute(AviChunk.Attribute.Size, Size == ExpectedSize, true);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.VideoFormatToken, typeof(VideoFormatToken));
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.VideoStandard, typeof(VideoStandard));
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.VerticalRefreshRate);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.HorizontalTotalInT);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.VerticalTotalInLines);
}
if (parser.BytesRemaining >= 4)
{
parser.GetFrameAspectRatio(Attribute.FrameAspectRatio);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.FrameWidthInPixels);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.FrameHeightInLines);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.FieldPerFrame);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.CompressedBitmapHeight);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.CompressedBitmapWidth);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.ValidBitmapHeight);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.ValidBitmapWidth);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.ValidBitmapXOffset);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.ValidBitmapYOffset);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.VideoXOffsetInT);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.VideoYValidStartLine);
}
return(Valid);
}
public override bool Parse(AviParser parser)
{
if (!base.Parse(parser))
{
return(false);
}
const int FrameSize = 4 * sizeof(short);
const int IntFieldCount = 11;
const int ShortFieldCount = 2;
const int ExpectedSize = IntFieldCount * sizeof(int) + ShortFieldCount * sizeof(short) + FrameSize;
// One sample had 8 bytes more.
// The assumption is made that the frame is written in four ints
// instead of in four shorts.
const int ExtraBytesAllowed = 8;
if ((Size < ExpectedSize) ||
(Size > ExpectedSize && Size <= ExpectedSize + ExtraBytesAllowed)) // invalidate the size attribute
{
parser.CheckAttribute(AviChunk.Attribute.Size, Size == ExpectedSize, false);
}
else if (Size > ExpectedSize + ExtraBytesAllowed) // invalidate the complete header
{
parser.CheckAttribute(AviChunk.Attribute.Size, Size == ExpectedSize, true);
}
if (parser.BytesRemaining >= 4)
{
StreamType = parser.GetFourCC(Attribute.StreamType);
}
if (parser.BytesRemaining >= 4)
{
Handler = parser.GetFourCC(Attribute.Handler);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.Flags);
}
// TODO parse flags
//
// AVISF_DISABLED = 0x00000001
// Indicates this stream should not be enabled by default
//
// AVISF_VIDEO_PALCHANGES = 0x00010000
// Indicates this video stream contains palette changes.
// This flag warns the playback software that it will need to
// animate the palette.
//
if (parser.BytesRemaining >= 2)
{
parser.GetShort(Attribute.Priority);
}
if (parser.BytesRemaining >= 2)
{
parser.GetShort(Attribute.Language);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.InitialFrames);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.Scale);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.Rate);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.Start);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.Length);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.SuggestedBufferSize);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.Quality);
}
if (parser.BytesRemaining >= 4)
{
parser.GetInt(Attribute.SampleSize);
}
if (Size == ExpectedSize)
{
if (parser.BytesRemaining >= 8)
{
parser.GetFrame(Attribute.Frame, FrameFieldType.Short);
}
}
else if (Size == ExpectedSize + 4 * sizeof(short))
{
if (parser.BytesRemaining >= 16)
{
parser.GetFrame(Attribute.Frame, FrameFieldType.Int);
}
}
return(Valid);
}
