RiffChunk(Stream stream, RiffAviFourCCCode code, RiffChunk parent)
{
this.stream = stream;
WriteBits(RiffAviFourCCCodes.GetCode(code));
bookmark = new StreamBookmark(this.stream);
bookmark.CaptureAndWrite(0);
size = 0;
this.parentChunk = parent;
if (this.parentChunk != null)
{
this.parentChunk.size += 8;
}
}
public StreamBookmark WriteAndBookmarkDWORD(UInt32 value)
{
StreamBookmark bookmark = new StreamBookmark(this.stream);
bookmark.CaptureAndWrite(value);
this.size += 4;
return (bookmark);
}
void WriteStrhHeaderStructure(RiffChunk chunk)
{
chunk.WriteFourCC(RiffAviFourCCCode.Vids); // 'vids'
chunk.WriteFourCC(RiffAviFourCCCode.Dib); // 'DIB '
chunk.WriteDWORD(0); // flags
chunk.WriteWORD(0); // priority
chunk.WriteWORD(0); // language
chunk.WriteDWORD(0); // initial frames
chunk.WriteDWORD(1); // scale
chunk.WriteDWORD(framesPerSecond); // rate
chunk.WriteDWORD(0); // start
strhFrameCountBookmark =
chunk.WriteAndBookmarkDWORD(0); // frameCount
chunk.WriteDWORD(width * height * 4); // suggested buffer size
chunk.WriteDWORD(0); // quality
chunk.WriteDWORD(0); // sample size
chunk.WriteDWORD(0); // left
chunk.WriteDWORD(0); // top
chunk.WriteDWORD((ushort)width); // right
chunk.WriteDWORD((ushort)height); // bottom
}
void WriteAvihHeaderStructure(RiffChunk chunk)
{
UInt32 microSecondsPerFrame =
(UInt32)((1.0 / framesPerSecond) * 1.0E6);
chunk.WriteDWORD(microSecondsPerFrame); // Microseconds per frame
chunk.WriteDWORD(0); // Max Bytes Per Second
chunk.WriteDWORD(0); // Padding granularity
chunk.WriteDWORD(0); // Flags
avihFrameCountBookmark =
chunk.WriteAndBookmarkDWORD(0); // Total frames
chunk.WriteDWORD(0); // Initial frames
chunk.WriteDWORD(1); // Streams
chunk.WriteDWORD(width * height * 4); // Suggested buffer size
chunk.WriteDWORD(width); // Width
chunk.WriteDWORD(height); // Height
chunk.WriteDWORD(0); // Reserved [0]
chunk.WriteDWORD(0); // Reserved [1]
chunk.WriteDWORD(0); // Reserved [2]
chunk.WriteDWORD(0); // Reserved [3]
}