private void AddBitmapInternal(Bitmap bitmap)
{
//flip it.
bitmap.RotateFlip(RotateFlipType.RotateNoneFlipY);
BitmapData data = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height),
ImageLockMode.ReadOnly, bitmap.PixelFormat);
IntPtr outputStream = _aviStreamRef;
if (_aviCompressedStreamRef != IntPtr.Zero)
{
outputStream = _aviCompressedStreamRef;
}
int result = Avi.AVIStreamWrite(outputStream, _frameCount++, 1, data.Scan0,
(Int32)(data.Stride * data.Height), 0, 0, 0);
bitmap.UnlockBits(data);
//reset it.
bitmap.RotateFlip(RotateFlipType.RotateNoneFlipY);
if (result != 0)
{
throw new VideoStreamWriterException("Error adding bitmap to video stream.");
}
}
private void ReleaseFile()
{
if (_aviFileRef != IntPtr.Zero)
{
int result = Avi.AVIFileRelease(_aviFileRef);
if (result != 0)
{
throw new VideoStreamWriterException("Error releasing Avi file.");
}
}
}
private void ReleaseStream()
{
if (_aviStreamRef != IntPtr.Zero)
{
int result = Avi.AVIStreamRelease(_aviStreamRef);
if (result != 0)
{
throw new VideoStreamWriterException("Error releasing Avi stream.");
}
}
}
private void SetFormat(IntPtr aviStream)
{
Avi.BITMAPINFOHEADER info = GetImageFormat();
int result = Avi.AVIStreamSetFormat(aviStream, 0, ref info, info.biSize);
if (result != 0)
{
throw new VideoStreamWriterException("Avi stream format could not be set.");
}
GC.KeepAlive(info);
}
private void MakeStreamCompressed()
{
Avi.AVICOMPRESSOPTIONS compressOptions = GetCompressOptions();
int result = Avi.AVIMakeCompressedStream(out _aviCompressedStreamRef, _aviStreamRef, ref compressOptions, 0);
if (result != 0)
{
throw new Exception("Failed to create compressed stream.");
}
GC.KeepAlive(compressOptions);
SetFormat(_aviCompressedStreamRef);
}
private void Open()
{
Avi.AVIFileInit();
_initialized = true;
IntPtr aviFileRef;
int result = Avi.AVIFileOpen(out aviFileRef, _fileName, Avi.OF_WRITE | Avi.OF_CREATE, 0);
if (result != 0)
{
throw new VideoStreamWriterException("Avi file could not be created.");
}
_aviFileRef = aviFileRef;
CreateStream();
}
public void Close()
{
try
{
ReleaseCompressedStream();
ReleaseStream();
ReleaseFile();
}
finally
{
_aviCompressedStreamRef = IntPtr.Zero;
_aviStreamRef = IntPtr.Zero;
_aviFileRef = IntPtr.Zero;
if (_initialized)
{
_initialized = false;
Avi.AVIFileExit();
}
}
}
private void CreateStream()
{
Avi.AVISTREAMINFO streamInfo = GetStreamInfo();
int result = Avi.AVIFileCreateStream(_aviFileRef, out _aviStreamRef, ref streamInfo);
if (result != 0)
{
throw new VideoStreamWriterException("Avi stream could not be created.");
}
GC.KeepAlive(streamInfo);
if (!Codec.SupportsQuality)
{
SetFormat(_aviStreamRef);
}
else
{
MakeStreamCompressed();
}
}
