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);
}
public static BitmapInfoHeader Read(FourCCHeader fcc, BinaryReader br)
{
if (0 != fcc.fourcc.CompareTo("strf") ||
40 != fcc.bytes)
{
throw new ArgumentException("BitmapInfoHeader fourcc/size mismatch");
}
var r = new BitmapInfoHeader();
r.biSize = br.ReadUInt32();
r.biWidth = br.ReadInt32();
r.biHeight = br.ReadInt32();
r.biPlanes = br.ReadInt16();
r.biBitCount = br.ReadInt16();
r.biCompression = br.ReadUInt32();
r.biSizeImage = br.ReadUInt32();
r.biXPelsPerMeter = br.ReadInt32();
r.biYPelsPerMeter = br.ReadInt32();
r.biClrUsed = br.ReadUInt32();
r.biClrImportant = br.ReadUInt32();
return(r);
}
public static FourCCHeader Read(BinaryReader br)
{
var fh = new FourCCHeader();
fh.fourcc = Common.ReadFourCC(br);
fh.bytes = br.ReadUInt32();
return(fh);
}
public void ReadOneImage(FourCCHeader fcc)
{
PositionAndSize ps = new PositionAndSize();
ps.bytes = fcc.bytes;
ps.position = mBr.BaseStream.Position;
mImagePos.Add(ps);
mBr.BaseStream.Seek(fcc.bytes, SeekOrigin.Current);
}
public static ListHeader Read(FourCCHeader fcc, BinaryReader br)
{
var r = new ListHeader();
if (0 != fcc.fourcc.CompareTo("LIST"))
{
throw new ArgumentException("LIST header mismatch");
}
r.fcc = fcc.fourcc;
r.bytes = fcc.bytes;
r.type = Common.ReadFourCC(br);
return(r);
}
public static AviStreamHeader Read(FourCCHeader fcc, BinaryReader br)
{
var r = new AviStreamHeader();
r.fcc = fcc.fourcc;
r.cb = fcc.bytes;
if (0 != r.fcc.CompareTo("strh") ||
56 != r.cb)
{
throw new ArgumentException("AviStreamHeader fourcc/size mismatch");
}
r.fccType = Common.ReadFourCC(br);
r.fccHandler = Common.ReadFourCC(br);
r.dwFlags = br.ReadUInt32();
r.wPriority = br.ReadUInt16();
r.wLanguage = br.ReadUInt16();
r.dwInitialFrames = br.ReadUInt32();
r.dwScale = br.ReadUInt32();
r.dwRate = br.ReadUInt32();
r.dwStart = br.ReadUInt32();
r.dwLength = br.ReadUInt32();
r.dwSuggestedBufferSize = br.ReadUInt32();
r.dwQuality = br.ReadUInt32();
r.dwSampleSize = br.ReadUInt32();
r.left = br.ReadInt16();
r.top = br.ReadInt16();
r.right = br.ReadInt16();
r.bottom = br.ReadInt16();
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);
}
public void SkipUnknownHeader(FourCCHeader fcc)
{
mBr.BaseStream.Seek(fcc.bytes, SeekOrigin.Current);
}