public override bool Parse(AviParser parser)
{
if (!base.Parse(parser))
{
return(false);
}
if ((uint)Size > MaxUnparsedBytes)
{
return(false);
}
// Put the position back to the beginning of the header.
// We want to be able the read the channel property.
parser.Position -= 8;
// Read the channel property (first 2 bytes of fourcc)
if (!ParseChannel(parser))
{
return(false);
}
// Read the information type property (last 2 bytes of fourcc)
ParseStreamType(parser);
// Skip the 'Size' bytes
parser.Position += 4;
ulong size = Math.Min(Size, parser.BytesRemaining);
if (size > 0)
{
StreamData = parser.GetDataPacket(parser.Position, (long)size);
}
// Show the number of bytes that go to the codec detector
parser.AddAttribute(new FormattedAttribute <Attribute, ulong>(Attribute.NumberOfBytesForCodecDetector, parser.BytesRemaining));
// Prevent AviChunk.ParseEnd() from displaying the unparsed bytes as hex dump
parser.Position += (long)parser.BytesRemaining;
return(Valid);
}
public override bool Parse(AviParser parser)
{
if (!base.Parse(parser))
{
return(false);
}
switch (_aviStreamFormatType)
{
case AviStreamFormatType.Video:
parser.GetInt(Attribute.Size);
parser.GetInt(Attribute.Width);
parser.GetInt(Attribute.Height);
parser.GetShort(Attribute.Planes);
parser.GetShort(Attribute.BitCount);
Compression = parser.GetFourCC(Attribute.Compression);
parser.GetInt(Attribute.SizeImage);
parser.GetInt(Attribute.XPelsPerMeter);
parser.GetInt(Attribute.YPelsPerMeter);
parser.GetInt(Attribute.ClrUsed);
parser.GetInt(Attribute.ClrImportant);
ulong extraDataSize = parser.BytesRemaining;
if ((extraDataSize >= 17) && (extraDataSize < 256))
{
ExtraData = parser.GetDataPacket(parser.Position, (int)extraDataSize);
Attributes.Add(new FormattedAttribute <Attribute, ulong>(Attribute.ExtraDataSize, extraDataSize));
}
break;
case AviStreamFormatType.Audio:
FormatTagValue = parser.GetShort(Attribute.FormatTag, typeof(FormatTag));
parser.GetShort(Attribute.Channels);
parser.GetInt(Attribute.SamplesPerSec);
parser.GetInt(Attribute.AvgBytesPerSec);
parser.GetShort(Attribute.BlockAlign);
parser.GetShort(Attribute.BitsPerSample);
if (FormatTagValue != (short)FormatTag.WAVE_FORMAT_PCM &&
parser.BytesRemaining > 0)
{
parser.GetShort(Attribute.ExtraSize);
}
// TODO parse the other audio formats
switch (FormatTagValue)
{
case (short)FormatTag.WAVE_FORMAT_MPEGLAYER3:
if (parser.BytesRemaining > 0)
{
parser.GetShort(Attribute.Id);
parser.GetInt(Attribute.Flags); // TODO Parse the flags
parser.GetShort(Attribute.BlockSize);
parser.GetShort(Attribute.FramesPerBlock);
// Some file I found did not have this last field
if (parser.BytesRemaining > 0)
{
parser.GetShort(Attribute.CodecDelay);
}
}
break;
}
break;
default:
break;
}
return(Valid);
}
