public static AviMainHeader Read(FourCCHeader fcc, BinaryReader br)
{
var r = new AviMainHeader();
r.fcc = fcc.fourcc;
r.cb = fcc.bytes;
if (0 != r.fcc.CompareTo("avih") ||
56 != r.cb)
{
throw new ArgumentException("AviMainHeader fourcc/size mismatch");
}
r.dwMicroSecPerFrame = br.ReadUInt32();
r.dwMaxBytesPersec = br.ReadUInt32();
r.dwPaddingGranularity = br.ReadUInt32();
r.dwFlags = br.ReadUInt32();
r.dwTotalFrames = br.ReadUInt32();
r.dwInitialFrames = br.ReadUInt32();
r.dwStreams = br.ReadUInt32();
r.dwSuggestedBufferSize = br.ReadUInt32();
r.dwWidth = br.ReadUInt32();
r.dwHeight = br.ReadUInt32();
r.dwReserved0 = br.ReadUInt32();
r.dwReserved1 = br.ReadUInt32();
r.dwReserved2 = br.ReadUInt32();
r.dwReserved3 = br.ReadUInt32();
return(r);
}
/* RIFF "AVI "
* LIST "hdrl"
* avih AviMainHeader
* LIST "strl"
* strh AviStreamHeader
* strf BitmapInfoHeader
* LIST "movi"
* 00db
* 00db
* ...
* RIFF "AVIX"
* LIST "movi"
* 00db
* 00db
* ...
*/
public bool Open(string path)
{
mImagePos.Clear();
mBr = new BinaryReader(new FileStream(path, FileMode.Open, FileAccess.Read));
var riffHeader = RiffHeader.Read(mBr);
if (0 != riffHeader.riff.CompareTo("RIFF") ||
0 != riffHeader.type.CompareTo("AVI "))
{
Console.WriteLine("E: this is not AVI");
return(false);
}
try {
do
{
var fcc = FourCCHeader.Read(mBr);
Console.WriteLine("{0}", fcc.fourcc);
switch (fcc.fourcc)
{
case "RIFF":
var riffType = Common.ReadFourCC(mBr);
if (0 != riffType.CompareTo("AVIX"))
{
Console.WriteLine("D: Unknown Riff {0}", riffType);
}
break;
case "LIST":
var lst = ListHeader.Read(fcc, mBr);
break;
case "avih":
mAviMainHeader = AviMainHeader.Read(fcc, mBr);
break;
case "strh":
mAviStreamHeader = AviStreamHeader.Read(fcc, mBr);
break;
case "strf":
if (0 == mAviStreamHeader.fccType.CompareTo("vids"))
{
mBmpih = BitmapInfoHeader.Read(fcc, mBr);
}
else
{
SkipUnknownHeader(fcc);
}
break;
case "00db":
case "00dc":
ReadOneImage(fcc);
break;
default:
SkipUnknownHeader(fcc);
break;
}
} while (true);
} catch (EndOfStreamException) {
// OK
}
Console.WriteLine("Total {0} images", mImagePos.Count);
if (mImagePos.Count == 0)
{
Close();
return(false);
}
return(true);
}
